2024-03-29T09:50:26Z
https://drops.dagstuhl.de/oai
oai:drops-oai.dagstuhl.de:3449
2012-03-07T00:00:00Z
ddc:004
open_access
Dagstuhl Manifestos, Volume 1, Issue 1, January - December 2011, Complete Issue
Dagstuhl Manifestos, Volume 1, Issue 1, January - December 2011, Complete Issue
Dagstuhl Manifestos, Volume 1, Issue 1, January - December 2011, Complete Issue
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
2012
Is Part Of Dagstuhl Manifestos, Volume 1, Issue 1 (2011)
Article
Text
doc-type:ResearchArticle
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application/pdf
doi:10.4230/DagMan.1.1
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eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3448
2012-03-07T00:00:00Z
ddc:004
open_access
Dagstuhl Manifestos, Table of Contents, Volume 1, Issue 1, 2011
Dagstuhl Manifestos
Table of Contents
Volume 1
Issue 1
2011
Dagstuhl Manifestos, Table of Contents, Volume 1, Issue 1, 2011
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
2012
Is Part Of Dagstuhl Manifestos, Volume 1, Issue 1 (2011)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.1.1.i
urn:nbn:de:0030-drops-34480
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.1.1.i
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3205
2011-08-30T00:00:00Z
ddc:004
open_access
Online Privacy: Towards Informational Self-Determination on the Internet (Dagstuhl Perspectives Workshop 11061)
Fischer-Hübner, Simone
Hoofnagle, Chris
Krontiris, Ioannis
Rannenberg, Kai
Waidner, Michael
Online Social Networks
Informational Self-Determination
Privacy Enhancing Technologies
Data Protection Directive
While the collection and monetization of user data has become a main source for funding ``free'' services like search engines, online social networks, news sites and blogs, neither privacy-enhancing technologies nor its regulations have kept up with user needs and privacy preferences.
The aim of this Manifesto is to raise awareness for the actual state of the art of online privacy, especially in the international research community and in ongoing efforts to improve the respective legal frameworks, and to provide concrete recommendations to industry, regulators, and research agencies for improving online privacy. In particular we examine how the basic principle of informational self-determination, as promoted by European legal doctrines, could be applied to infrastructures like the internet, Web 2.0 and mobile telecommunication networks.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Simone Fischer-Hübner and Chris Hoofnagle and Ioannis Krontiris and Kai Rannenberg and Michael Waidner
2011
Is Part Of Dagstuhl Manifestos, Volume 1, Issue 1 (2011)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.1.1.1
urn:nbn:de:0030-drops-32055
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.1.1.1
eng
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oai:drops-oai.dagstuhl.de:3212
2011-09-30T00:00:00Z
ddc:004
open_access
Modeling, Analysis, and Verification - The Formal Methods Manifesto 2010 (Dagstuhl Perspectives Workshop 10482)
Kreiker, Jörg
Tarlecki, Andrzej
Vardi, Moshe Y.
Wilhelm, Reinhard
Formal methods
Verification
Analysis
Modeling
Design for Verifiability
This manifesto represents the results of the Dagstuhl Perspectives Workshop 10482 "Formal Methods – Just a Euro-Science?" held from November 30 to December 3, 2010 at Schloss Dagstuhl, Germany. We strive to clarify the terminology and categorize the abundance of concepts and methods in order to reduce misunderstandings among the involved research community and in communication with industry. We discuss the industrial acceptance of formal methods and how to increase it by targeted research and improved education. Finally, we state a few challenges and provide perspectives of the field. This document is opinionated in nature and biased towards the experiences and views of the participants listed in the appendix, further distilled by the authors.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Jörg Kreiker and Andrzej Tarlecki and Moshe Y. Vardi and Reinhard Wilhelm
2011
Is Part Of Dagstuhl Manifestos, Volume 1, Issue 1 (2011)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.1.1.21
urn:nbn:de:0030-drops-32121
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.1.1.21
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3445
2012-03-06T00:00:00Z
ddc:004
open_access
Improving The Future of Research Communications and e-Scholarship (Dagstuhl Perspectives Workshop 11331)
Bourne, Philip E.
Clark, Timothy W.
Dale, Robert
de Waard, Anita
Herman, Ivan
Hovy, Eduard H.
Shotton, David
Elektronisches Publizieren
Dokumentenserver
Bibliometrie Science publishing
online communities
science policy
digital repositories
semantic publishing
citation analysis
The dissemination of knowledge derived from research and scholarship has a fundamental impact on the ways in which society develops and progresses, and at the same time it feeds back to improve subsequent research and scholarship. Here, as in so many other areas of human activity, the internet is changing the way things work; two decades of emergent and increasingly pervasive information technology have demonstrated the potential for far more effective scholarly communication. But the use of this technology remains limited.
Force11 is a community of scholars, librarians, archivists, publishers and research funders that has arisen organically to help facilitate the change toward improved knowledge creation and sharing. This document highlights the findings of the Force11 workshop on the Future of Research Communication held at Schloss Dagstuhl, Germany, in August 2011: it summarizes a number of key problems facing scholarly publishing today, and presents a vision that addresses these problems, proposing concrete steps that key stakeholders can take to improve the state of scholarly publishing.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Philip E. Bourne and Timothy W. Clark and Robert Dale and Anita de Waard and Ivan Herman and Eduard H. Hovy and David Shotton
2012
Is Part Of Dagstuhl Manifestos, Volume 1, Issue 1 (2011)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.1.1.41
urn:nbn:de:0030-drops-34458
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.1.1.41
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:4171
2013-07-30T00:00:00Z
ddc:004
open_access
Dagstuhl Manifestos, Volume 2, Issue 1, January - December 2012, Complete Issue
Dagstuhl Manifestos, Volume 2, Issue 1, January - December 2012, Complete Issue
Dagstuhl Manifestos, Volume 2, Issue 1, January - December 2012, Complete Issue
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
2013
Is Part Of Dagstuhl Manifestos, Volume 2, Issue 1 (2012)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.2.1
urn:nbn:de:0030-drops-41719
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.2.1
eng
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oai:drops-oai.dagstuhl.de:4170
2013-07-30T00:00:00Z
ddc:004
open_access
Dagstuhl Manifestos, Table of Contents, Volume 2, Issue 1, 2012
Dagstuhl Manifestos
Table of Contents
Volume 2
Issue 1
2012
Dagstuhl Manifestos, Table of Contents, Volume 2, Issue 1, 2012
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
2013
Is Part Of Dagstuhl Manifestos, Volume 2, Issue 1 (2012)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.2.1.i
urn:nbn:de:0030-drops-41704
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.2.1.i
eng
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oai:drops-oai.dagstuhl.de:3654
2012-09-06T00:00:00Z
ddc:004
open_access
Social, Supply-Chain, Administrative, Business, Commerce, Political networks: a multi-discipline perspective (Dagstuhl Perspectives Workshop 12182)
Häsel, Matthias
Quandt, Thorsten
Vossen, Gottfried
Networks
network infrastructure
network types
network effects
data in networks
social networks
social media
crowdsourcing
This is the manifesto of Dagstuhl Perspectives Workshop 12182 on a multi-discipline perspective on networks. The information society is shaped by an increasing presence of networks in various manifestations, most notably computer networks, supply-chain networks, and social networks, but also business networks, administrative networks, or political networks. Online networks nowadays connect people all around the world at day and night, and
allow to communicate and to work collaboratively and efficiently. What has been a commodity in the private as well as in the enterprise sectors independently for quite some time now is currently growing together at an increasing pace. As a consequence, the time has come for the relevant sciences, including computer
science, information systems, social sciences, economics, communication sciences, and others, to give up their traditional "silo-style" thinking and enter into borderless dialogue and interaction. The purpose of this Manifesto is to review where we stand today, and to outline directions in which we urgently need to move, in terms of both research and teaching, but also in terms of funding.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Matthias Häsel and Thorsten Quandt and Gottfried Vossen
2012
Is Part Of Dagstuhl Manifestos, Volume 2, Issue 1 (2012)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.2.1.1
urn:nbn:de:0030-drops-36542
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.2.1.1
eng
https://creativecommons.org/licenses/by-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:4167
2013-07-30T00:00:00Z
ddc:004
open_access
Computation and Palaeography: Potentials and Limits (Dagstuhl Perspectives Workshop 12382)
Hassner, Tal
Rehbein, Malte
Stokes, Peter A.
Wolf, Lior
Digital Humanities
Digital Palaeography
Cultural Heritage
This manifesto documents the program and outcomes of Dagstuhl Seminar 12382 `Perspectives Workshop: Computation and Palaeography: Potentials and Limits'. The workshop focused on the interaction of palaeography, the study of ancient and medieval documents, with computerized tools, particularly those developed for analysis of digital images and text mining. The goal of this marriage of disciplines is to provide efficient solutions to time and labor consuming palaeographic tasks. It furthermore attempts to provide scholars with quantitative evidence to palaeographical arguments, consequently facilitating a better understanding of our cultural heritage through the unique perspective of ancient and medieval documents. The workshop provided a vital opportunity for palaeographers to interact and discuss the potential of digital methods with
computer scientists specializing in machine vision and statistical data analysis. This was essential not only in suggesting new directions and ideas for improving palaeographic research, but also in identifying questions which scholars working individually, in their respective fields, would not have
asked without directly communicating with colleagues from outside their research community.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Tal Hassner and Malte Rehbein and Peter A. Stokes and Lior Wolf
2013
Is Part Of Dagstuhl Manifestos, Volume 2, Issue 1 (2012)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.2.1.14
urn:nbn:de:0030-drops-41679
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.2.1.14
eng
https://creativecommons.org/licenses/by-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:4790
2014-10-16T00:00:00Z
ddc:004
open_access
Dagstuhl Manifestos, Volume 3, Issue 1, January - December 2013, Complete Issue
Dagstuhl Manifestos, Volume 3, Issue 1, January - December 2013, Complete Issue
Dagstuhl Manifestos, Volume 3, Issue 1, January - December 2013, Complete Issue
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
2014
Is Part Of Dagstuhl Manifestos, Volume 3, Issue 1 (2013)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.3.1
urn:nbn:de:0030-drops-47909
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.3.1
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:4789
2014-10-16T00:00:00Z
ddc:004
open_access
Dagstuhl Manifestos, Table of Contents, Volume 3, Issue 1, 2013
Dagstuhl Manifestos
Table of Contents
Volume 3
Issue 1
2013
Dagstuhl Manifestos, Table of Contents, Volume 3, Issue 1, 2013
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
2014
Is Part Of Dagstuhl Manifestos, Volume 3, Issue 1 (2013)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.3.1.i
urn:nbn:de:0030-drops-47896
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.3.1.i
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:4356
2013-11-29T00:00:00Z
ddc:004
open_access
Machine Learning Methods for Computer Security (Dagstuhl Perspectives Workshop 12371)
Joseph, Anthony D.
Laskov, Pavel
Roli, Fabio
Tygar, J. Doug
Nelson, Blaine
Adversarial Learning
Computer Security
Robust Statistical Learning
Online Learning with Experts
Game Theory
Learning Theory
The study of learning in adversarial environments is an emerging discipline at the juncture between machine learning and computer security. The interest in learning-based methods for security- and system-design applications comes from the high degree of complexity of phenomena underlying the security and reliability of computer systems. As it becomes increasingly difficult to reach the desired properties solely using statically designed mechanisms, learning methods are being used more and more to obtain a better understanding of various data collected from these complex systems. However, learning approaches can be evaded by adversaries, who change their behavior in response to the learning methods. To-date, there has been limited research into learning techniques that are resilient to attacks with provable robustness guarantees
The Perspectives Workshop, "Machine Learning Methods for Computer Security" was convened to bring together interested researchers from both the computer security and machine learning communities to discuss techniques, challenges, and future research directions for secure learning and learning-based security applications. As a result of the twenty-two invited presentations, workgroup sessions and informal discussion, several priority areas of research were
identified. The open problems identified in the field ranged from traditional applications of machine learning in security, such as attack detection and analysis of malicious software, to methodological issues related to secure learning, especially the development of new formal approaches with provable security guarantees. Finally a number of other potential applications were
pinpointed outside of the traditional scope of computer security in which
security issues may also arise in connection with data-driven methods. Examples of such applications are social media spam, plagiarism detection, authorship identification, copyright enforcement, computer vision (particularly in the context of biometrics), and sentiment analysis.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Anthony D. Joseph and Pavel Laskov and Fabio Roli and J. Doug Tygar and Blaine Nelson
2013
Is Part Of Dagstuhl Manifestos, Volume 3, Issue 1 (2013)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.3.1.1
urn:nbn:de:0030-drops-43569
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.3.1.1
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:4429
2014-01-13T00:00:00Z
ddc:004
open_access
ICT for Bridging Biology and Medicine (Dagstuhl Perspectives Workshop 13342)
Almeida, Jonas S.
Dress, Andreas
Kühne, Titus
Parida, Laxmi
Systems medicine
health-care related information systems
biomedical workflow engines
medical cloud
patient participation
ICT literacy
The systems paradigm of modern medicine presents both, an opportunity and a challenge, for current Information and Communication Technology (ICT). The opportunity is to understand the spatio-temporal organisation and dynamics of the human body as an integrated whole, incorporating the biochemical, physiological, and environmental interactions that sustain life. Yet, to accomplish this, one has to meet the challenge of integrating, visualising, interpreting, and utilising an unprecedented amount of in-silico, in-vitro and in-vivo data related to health care in a systematic, transparent, comprehensible, and reproducible fashion. This challenge is substantially compounded by the critical need to align technical solutions with the increasingly social dimension of modern ICT and the wide range of stakeholders in modern health-care systems.
Unquestionably, advancing health-care related ICT has the potential of fundamentally revolutionising care-delivery systems, affecting all our lives both, personally and -- in view of the enormous costs of health--care systems in modern societies -- also financially.
Accordingly, to ponder the options of ICT for delivering the promise of systems approaches to medical care, medical researchers and physicians, biologists and mathematicians, computer scientists and information--systems experts
from three continents and from both, industry and academia, met in Dagstuhl for a Dagstuhl Perspectives Workshop on ICT Strategies for Bridging Biology and Medicine from August 18 to 23, 2013, to thoroughly discuss this multidisciplinary topic and to derive and compile a comprehensive list of pertinent recommendations -- rather than just to deliver a set package of sanitised powerpoint presentations on medical ICT. The recommendations in this manifesto reflect points of convergence that emerged during the intense discussions and analyses taking place the workshop. They also reflect a particular attention given to the identification of challenges for improving the effectiveness of ICT approaches to Systems Biomedicine.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Jonas S. Almeida and Andreas Dress and Titus Kühne and Laxmi Parida
2014
Is Part Of Dagstuhl Manifestos, Volume 3, Issue 1 (2013)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.3.1.31
urn:nbn:de:0030-drops-44292
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.3.1.31
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:5466
2015-09-14T00:00:00Z
ddc:004
open_access
Dagstuhl Manifestos, Volume 4, Issue 1, January - December 2014, Complete Issue
Dagstuhl Manifestos, Volume 4, Issue 1, January - December 2014, Complete Issue
Dagstuhl Manifestos, Volume 4, Issue 1, January - December 2014, Complete Issue
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
2015
Is Part Of Dagstuhl Manifestos, Volume 4, Issue 1 (2014)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.4.1
urn:nbn:de:0030-drops-54667
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.4.1
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:5465
2015-09-14T00:00:00Z
ddc:004
open_access
Dagstuhl Manifestos, Table of Contents, Volume 4, Issue 1, 2014
Dagstuhl Manifestos
Table of Contents
Volume 4
Issue 1
2014
Dagstuhl Manifestos, Table of Contents, Volume 4, Issue 1, 2014
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
2015
Is Part Of Dagstuhl Manifestos, Volume 4, Issue 1 (2014)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.4.1.i
urn:nbn:de:0030-drops-54656
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.4.1.i
eng
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oai:drops-oai.dagstuhl.de:4786
2014-10-16T00:00:00Z
ddc:004
open_access
Massive Open Online Courses: Current State and Perspectives (Dagstuhl Perspectives Workshop 14112)
Dillenbourg, Pierre
Fox, Armando
Kirchner, Claude
Mitchell, John
Wirsing, Martin
Massive open online course
MOOC
SPOC
e-learning
education
The rapid emergence and adoption of Massive Open Online Courses (MOOCs) has raised new questions and rekindled old debates in higher education. Academic leaders are concerned about educational quality, access to content, privacy protection for learner data, production costs and the proper relationship between MOOCs and residential instruction, among other matters. At the same time, these same leaders see opportunities for the scale of MOOCs to support learning: faculty interest in teaching innovation, better learner engagement through personalization, increased understanding of learner behavior through large-scale data analytics, wider access for continuing education learners and other nonresidential learners, and the possibility to enhance revenue or lower educational costs. Two years after "the year of the MOOC", this report summarizes the state of the art and the future directions of greatest interest as seen by an international group of academic leaders. Eight provocative positions are put forward, in hopes of aiding policy-makers, academics, administrators, and learners regarding the potential future of MOOCs in higher education. The recommendations span a variety of topics including financial considerations, pedagogical quality, and the social fabric.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Pierre Dillenbourg and Armando Fox and Claude Kirchner and John Mitchell and Martin Wirsing
2014
Is Part Of Dagstuhl Manifestos, Volume 4, Issue 1 (2014)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.4.1.1
urn:nbn:de:0030-drops-47861
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.4.1.1
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:4966
2015-03-16T00:00:00Z
ddc:004
open_access
Co-Design of Systems and Applications for Exascale (Dagstuhl Perspectives Workshop 12212)
Bode, Arndt
Hoisie, Adolfy
Kranzlmüller, Dieter
Nagel, Wolfgang E.
Straube, Christian
Exascale
Co-Deisgn
Scalability
Power Efficiency
Reliability
The Dagstuhl Perspectives Workshop 12212 on "Co-Design of Systems and Applications for Exascale" is reaching into the future, where exascale systems with their capabilities provide new possibilities and challenges. The goal of the workshop has been to identify concrete barriers and obstacles, and to discuss ideas on how to overcome them. It is a common agreement that co-design across all layers, algorithms, applications, programming models, run-time systems, architectures, and infrastructures, will be required. The discussion between the experts identified a series of requirements on exascale co-design efforts, as well as concrete recommendations and open questions for future research.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Arndt Bode and Adolfy Hoisie and Dieter Kranzlmüller and Wolfgang E. Nagel and Christian Straube
2015
Is Part Of Dagstuhl Manifestos, Volume 4, Issue 1 (2014)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.4.1.28
urn:nbn:de:0030-drops-49663
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.4.1.28
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:5690
2016-01-19T00:00:00Z
ddc:004
open_access
Dagstuhl Manifestos, Volume 5, Issue 1, January - December 2015, Complete Issue
Dagstuhl Manifestos, Volume 5, Issue 1, January - December 2015, Complete Issue
Dagstuhl Manifestos, Volume 5, Issue 1, January - December
2015, Complete Issue
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
2016
Is Part Of Dagstuhl Manifestos, Volume 5, Issue 1 (2015)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.5.1
urn:nbn:de:0030-drops-56908
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.5.1
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:5689
2016-01-19T00:00:00Z
ddc:004
open_access
Dagstuhl Manifestos, Table of Contents, Volume 5, Issue 1, 2015
Dagstuhl Manifestos
Table of Contents
Volume 5
Issue 1
2015
Dagstuhl Manifestos, Table of Contents, Volume 5, Issue 1, 2015
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
2016
Is Part Of Dagstuhl Manifestos, Volume 5, Issue 1 (2015)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.5.1.i
urn:nbn:de:0030-drops-56895
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.5.1.i
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:5509
2015-10-23T00:00:00Z
ddc:004
open_access
Connecting Performance Analysis and Visualization (Dagstuhl Perspectives Workshop 14022)
Bremer, Peer-Timo
Mohr, Bernd
Pascucci, Valerio
Schulz, Martin
Gamblin, Todd
Brunst, Holger
Performance Analysis
Performance Tools
Information Visualization
Visual Analytics
In the first week of January 2014 Schloss Dagstuhl hosted a Perspectives Workshop on “Connecting Performance Analysis and Visualization to Advance Extreme Scale Computing”. The workshop brought together two previously separate communities – from Visualization and Performance Analysis for High Performance Computing – to discuss a long term joint research agenda. The goal was to identify and address the challenges in using visual representations to understand and optimize the performance of extreme-scale applications running on today's most powerful
computing systems like climate modeling, combustion, material science or astro-physics simulations.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Peer-Timo Bremer and Bernd Mohr and Valerio Pascucci and Martin Schulz and Todd Gamblin and Holger Brunst
2015
Is Part Of Dagstuhl Manifestos, Volume 5, Issue 1 (2015)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.5.1.1
urn:nbn:de:0030-drops-55099
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.5.1.1
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:5565
2015-11-13T00:00:00Z
ddc:004
open_access
Privacy and Security in an Age of Surveillance (Dagstuhl Perspectives Workshop 14401)
Preneel, Bart
Rogaway, Philipp
Ryan, Mark D.
Ryan, Peter Y. A.
Big data
encryption
mass surveillance
privacy
Before the Snowden revelations about the scope of surveillance by the NSA and its partner agencies, most people assumed that surveillance was limited to what is necessary and proportionate for these agencies to fulfil their prescribed role. People assumed that oversight mechanisms were in place to ensure that
surveillance was appropriately constrained. But the Snowden revelations undermine these beliefs. We now know that nations are amassing personal data about people's lives at an unprecedented scale, far beyond most people's wildest expectations.
The scope of state surveillance must be limited by an understanding of its costs as well as benefits. The costs are not limited to financial ones but also include eroding personal rights and the degradation to the integrity, vibrancy, or fundamental character of civil society.
This manifesto stems from a Dagstuhl Perspectives Workshop held in late 2014.
The meeting was a four-day gathering of experts from multiple disciplines connected with privacy and security. The aim was to explore how society as a whole, and the computing science community in particular, should respond to the Snowden revelations. More precisely, the meeting discussed the scope and nature of the practice of mass-surveillance, basic principles that should underlie reforms, and the potential for technical, legal, and other means to help stem or restore human rights threatened by ubiquitous electronic surveillance.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Bart Preneel and Philipp Rogaway and Mark D. Ryan and Peter Y. A. Ryan
2015
Is Part Of Dagstuhl Manifestos, Volume 5, Issue 1 (2015)
Article
Text
doc-type:ResearchArticle
publishedVersion
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doi:10.4230/DagMan.5.1.25
urn:nbn:de:0030-drops-55653
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.5.1.25
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:8439
2018-02-07T00:00:00Z
ddc:004
open_access
Dagstuhl Manifestos, Volume 6, Issue 1, January 2016 - December 2017, Complete Issue
Dagstuhl Manifestos, Volume 6, Issue 1, January 2016 - December 2017, Complete Issue
Dagstuhl Manifestos, Volume 6, Issue 1, January 2016 - December
2017, Complete Issue
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
2018
Is Part Of Dagstuhl Manifestos, Volume 6, Issue 1 (2017)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.6.1
urn:nbn:de:0030-drops-84399
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.6.1
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:8438
2018-02-07T00:00:00Z
ddc:004
open_access
Dagstuhl Manifestos, Table of Contents, Volume 6, Issue 1, 2016-2017
Dagstuhl Manifestos
Table of Contents
Volume 6
Issue 1
2016-2017
Dagstuhl Manifestos, Table of Contents, Volume 6, Issue 1, 2016-2017
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
2018
Is Part Of Dagstuhl Manifestos, Volume 6, Issue 1 (2017)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.6.1.i
urn:nbn:de:0030-drops-84388
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.6.1.i
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:7146
2017-05-23T00:00:00Z
ddc:004
open_access
Engineering Academic Software (Dagstuhl Perspectives Workshop 16252)
Allen, Alice
Aragon, Cecilia
Becker, Christoph
Carver, Jeffrey
Chis, Andrei
Combemale, Benoit
Croucher, Mike
Crowston, Kevin
Garijo, Daniel
Gehani, Ashish
Goble, Carole
Haines, Robert
Hirschfeld, Robert
Howison, James
Huff, Kathryn
Jay, Caroline
Katz, Daniel S.
Kirchner, Claude
Kuksenok, Katie
Lämmel, Ralf
Nierstrasz, Oscar
Turk, Matt
van Nieuwpoort, Rob
Vaughn, Matthew
Vinju, Jurgen J.
Academic software
Research software
Software citation
Software sustainability
Software is often a critical component of scientific research. It can be a component of the academic research methods used to produce research results, or it may itself be an academic research result. Software, however, has rarely been considered to be a citable artifact in its own right. With the advent of open-source software, artifact evaluation committees of conferences, and journals that include source code and running systems as part of the published artifacts, we foresee that software will increasingly be recognized as part of the academic process. The quality and sustainability of this software must be accounted for, both a prioro and a posteriori.
The Dagstuhl Perspectives Workshop on "Engineering Academic Software" has examined the strengths, weaknesses, risks, and opportunities of academic software engineering. A key outcome of the workshop is this Dagstuhl Manifesto, serving as a roadmap towards future professional software engineering for software-based research instruments and other software produced and used in an academic context. The manifesto is expressed in terms of a series of actionable "pledges" that users and developers of academic research software can take as concrete steps towards improving the environment in which that software is produced.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Alice Allen and Cecilia Aragon and Christoph Becker and Jeffrey Carver and Andrei Chis and Benoit Combemale and Mike Croucher and Kevin Crowston and Daniel Garijo and Ashish Gehani and Carole Goble and Robert Haines and Robert Hirschfeld and James Howison and Kathryn Huff and Caroline Jay and Daniel S. Katz and Claude Kirchner and Katie Kuksenok and Ralf Lämmel and Oscar Nierstrasz and Matt Turk and Rob van Nieuwpoort and Matthew Vaughn and Jurgen J. Vinju
2017
Is Part Of Dagstuhl Manifestos, Volume 6, Issue 1 (2017)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.6.1.1
urn:nbn:de:0030-drops-71468
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.6.1.1
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:10180
2019-01-22T00:00:00Z
ddc:004
open_access
Dagstuhl Manifestos, Volume 7, Issue 1, January - December 2018, Complete Issue
Dagstuhl Manifestos, Volume 7, Issue 1, January - December 2018, Complete Issue
Dagstuhl Manifestos, Volume 7, Issue 1, January - December 2018, Complete Issue
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
2019
Is Part Of Dagstuhl Manifestos, Volume 7, Issue 1 (2018)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.7.1
urn:nbn:de:0030-drops-101808
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.7.1
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:10179
2019-01-22T00:00:00Z
ddc:004
open_access
Dagstuhl Manifestos, Table of Contents, Volume 7, Issue 1, 2018
Dagstuhl Manifestos
Table of Contents
Volume 7
Issue 1
2018
Dagstuhl Manifestos, Table of Contents, Volume 7, Issue 1, 2018
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
2019
Is Part Of Dagstuhl Manifestos, Volume 7, Issue 1 (2018)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.7.1.i
urn:nbn:de:0030-drops-101795
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.7.1.i
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:8677
2018-04-09T00:00:00Z
ddc:004
open_access
Research Directions for Principles of Data Management (Dagstuhl Perspectives Workshop 16151)
Abiteboul, Serge
Arenas, Marcelo
Barceló, Pablo
Bienvenu, Meghyn
Calvanese, Diego
David, Claire
Hull, Richard
Hüllermeier, Eyke
Kimelfeld, Benny
Libkin, Leonid
Martens, Wim
Milo, Tova
Murlak, Filip
Neven, Frank
Ortiz, Magdalena
Schwentick, Thomas
Stoyanovich, Julia
Su, Jianwen
Suciu, Dan
Vianu, Victor
Yi, Ke
database theory
principles of data management
query languages
efficient query processing
query optimization
heterogeneous data
uncertainty
knowledge-enriched data management
machine learning
workflows
human-related data
ethics
The area of Principles of Data Management (PDM) has made crucial contributions to the development of formal frameworks for understanding and managing
data and knowledge. This work has involved a rich cross-fertilization between
PDM and other disciplines in mathematics and computer science, including logic, complexity theory, and knowledge representation. We anticipate on-going expansion of PDM research as the technology and applications involving data management continue to grow and evolve. In particular, the lifecycle of Big Data Analytics raises a wealth of challenge areas that PDM can help with.
In this report we identify some of the most important research directions where the PDM community has the potential to make significant contributions. This is done from three perspectives: potential practical relevance, results already obtained, and research questions that appear surmountable in the short and medium term.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Serge Abiteboul and Marcelo Arenas and Pablo Barceló and Meghyn Bienvenu and Diego Calvanese and Claire David and Richard Hull and Eyke Hüllermeier and Benny Kimelfeld and Leonid Libkin and Wim Martens and Tova Milo and Filip Murlak and Frank Neven and Magdalena Ortiz and Thomas Schwentick and Julia Stoyanovich and Jianwen Su and Dan Suciu and Victor Vianu and Ke Yi
2018
Is Part Of Dagstuhl Manifestos, Volume 7, Issue 1 (2018)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.7.1.1
urn:nbn:de:0030-drops-86772
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.7.1.1
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:8683
2018-04-16T00:00:00Z
ddc:004
open_access
QoE Vadis? (Dagstuhl Perspectives Workshop 16472)
Fiedler, Markus
Möller, Sebastian
Reichl, Peter
Xie, Min
multimedia
network and application management
network quality monitoring and measurement
quality of experience
socio-economic and business aspects
The goal of the Dagstuhl Perspectives Workshop 16472 has been to discuss and outline the strategic evolution of Quality of Experience as a key topic for future Internet research. The resulting manifesto, which is presented here, reviews the state of the art in the Quality of Experience (QoE) domain, along with a SWOT analysis. Based on those, it discusses how the QoE research area might develop in the future, and how QoE research will lead to innovative and improved products and services. It closes by providing a set of recommendations for the scientific community and industry, as well as for future funding of QoE-related activities.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Markus Fiedler and Sebastian Möller and Peter Reichl and Min Xie
2018
Is Part Of Dagstuhl Manifestos, Volume 7, Issue 1 (2018)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.7.1.30
urn:nbn:de:0030-drops-86830
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.7.1.30
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:8824
2018-05-29T00:00:00Z
ddc:004
open_access
Tensor Computing for Internet of Things (Dagstuhl Perspectives Workshop 16152)
Acar, Evrim
Anandkumar, Animashree
Mullin, Lenore
Rusitschka, Sebnem
Tresp, Volker
Distributed Systems
Real-time and embedded systems
Signal processing systems
Learning
Multiagent systems
"The fundamental laws necessary for the mathematical treatment of large part of physics and the whole of chemistry are thus completely known, and the difficulty lies only in the fact that application of these laws leads to equations that are too complex to be solved." - Dirac 1929
The digital world of Internet of Things (IoT) will provide a high-resolution depiction of our physical world through measurements and other data - even high-definition "video," if you consider streaming data frames coming from a myriad of sensors embedded in everything we use. This depiction will have captured our interactions with the physical world and the interactions of digitally enhanced machines and devices. Tensors, as generalizations of vectors and matrices, provide a natural and scalable framework for handling data with such inherent structures and complex dependencies. Scalable tensor methods have attracted considerable amount of attention, with successes in a series of learning tasks, such as learning latent variable models, relational learning, spatio-temporal forecasting as well as training [19] and compression [20] of deep neural networks.
In a Dagstuhl Perspectives Workshop on Tensor Computing for IoT, we validated the fundamental suitability of tensor methods for handling the massive amounts of data coming from connected cyber-physical systems (CPS). The multidisciplinary discourse among academics, industrial researchers and practitioners in the IoT/CPS domain and in the field of machine learning and tensor methods, exposed open issues that need to be addressed to reap value from the technological opportunity. This Manifesto summarizes the immediate action fields for advancement: IoT Tensor Data Benchmarks, Tensor Tools for IoT, and the evolution of a Knowledge Hub. The activities will also be channeled to create best practices and a common tensor language across the disciplines.
In a not so distant future, basic infrastructures for living will be mainly data-driven, automated by digitally enhanced devices and machines. The tools and frameworks used to engineer such systems will ensure production-ready machine learning code which utilizes tensor-based, hence better interpretable, models and runs on distributed, decentralized, and embedded computing resources in a robust and reliable way. We conclude the manifesto with a strategy how to move towards this vision with concrete steps in the identified action fields.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Evrim Acar and Animashree Anandkumar and Lenore Mullin and Sebnem Rusitschka and Volker Tresp
2018
Is Part Of Dagstuhl Manifestos, Volume 7, Issue 1 (2018)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.7.1.52
urn:nbn:de:0030-drops-88244
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.7.1.52
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:9895
2018-11-16T00:00:00Z
ddc:004
open_access
Present and Future of Formal Argumentation (Dagstuhl Perspectives Workshop 15362)
Gabbay, Dov M.
Giacomin, Massimiliano
Liao, Beishui
van der Torre, Leendert
Artificial Intelligence
Knowledge Representation and Reasoning
Multi-Agent Systems
Argumentation
Non-monotonic Logic
Formal Argumentation is emerging as a key reasoning paradigm building bridges among knowledge representation and reasoning in artificial intelligence, informal argumentation in philosophy and linguistics, legal and ethical argumentation, mathematical and logical reasoning, and graph-theoretic reasoning. It aims to capture diverse kinds of reasoning and dialogue activities in the presence of uncertainty and conflicting information in a formal and intuitive way, with potential applications ranging from argumentation mining, via LegalTech and machine ethics, to therapy
in clinical psychology. The turning point for the modern stage of formal argumentation theory, much similar to the introduction of possible worlds semantics for the theory of modality, is the framework and language of Dung's abstract argumentation theory introduced in 1995. This means that nothing could remain the same as before 1995 - it should be a focal point of reference for any study of argumentation, even if it is critical about it. Now, in modal logic, the introduction of the possible worlds semantics has led to a complete paradigm shift, both in tools and new subjects of studies. This is still not fully true for what is going on in argumentation theory. The Dagstuhl workshop led to the first volume of a handbook series in formal argumentation, reflecting the new stage of the development of argumentation theory.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Dov M. Gabbay and Massimiliano Giacomin and Beishui Liao and Leendert van der Torre
2018
Is Part Of Dagstuhl Manifestos, Volume 7, Issue 1 (2018)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.7.1.69
urn:nbn:de:0030-drops-98957
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.7.1.69
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:9898
2018-11-21T00:00:00Z
ddc:004
open_access
From Evaluating to Forecasting Performance: How to Turn Information Retrieval, Natural Language Processing and Recommender Systems into Predictive Sciences (Dagstuhl Perspectives Workshop 17442)
Ferro, Nicola
Fuhr, Norbert
Grefenstette, Gregory
Konstan, Joseph A.
Castells, Pablo
Daly, Elizabeth M.
Declerck, Thierry
Ekstrand, Michael D.
Geyer, Werner
Gonzalo, Julio
Kuflik, Tsvi
Lindén, Krister
Magnini, Bernardo
Nie, Jian-Yun
Perego, Raffaele
Shapira, Bracha
Soboroff, Ian
Tintarev, Nava
Verspoor, Karin
Willemsen, Martijn C.
Zobel, Justin
Information Systems
Formal models
Evaluation
Simulation
User Interaction
We describe the state-of-the-art in performance modeling and prediction for Information Retrieval (IR), Natural Language Processing (NLP) and Recommender Systems (RecSys) along with its shortcomings and strengths. We present a framework for further research, identifying five major problem areas: understanding measures, performance analysis, making underlying assumptions explicit, identifying application features determining performance, and the development of prediction models describing the relationship between assumptions, features and resulting performance.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Nicola Ferro and Norbert Fuhr and Gregory Grefenstette and Joseph A. Konstan and Pablo Castells and Elizabeth M. Daly and Thierry Declerck and Michael D. Ekstrand and Werner Geyer and Julio Gonzalo and Tsvi Kuflik and Krister Lindén and Bernardo Magnini and Jian-Yun Nie and Raffaele Perego and Bracha Shapira and Ian Soboroff and Nava Tintarev and Karin Verspoor and Martijn C. Willemsen and Justin Zobel
2018
Is Part Of Dagstuhl Manifestos, Volume 7, Issue 1 (2018)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.7.1.96
urn:nbn:de:0030-drops-98987
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.7.1.96
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:15758
2020-12-01T00:00:00Z
ddc:004
open_access
Dagstuhl Manifestos, Volume 8, Issue 1, January – December 2020, Complete Issue
Dagstuhl Manifestos, Volume 8, Issue 1, January – December 2020, Complete Issue
Dagstuhl Manifestos, Volume 8, Issue 1, January – December 2020, Complete Issue
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
2020
Is Part Of Dagstuhl Manifestos, Volume 8, Issue 1 (2020)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.8.1
urn:nbn:de:0030-drops-157580
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.8.1
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:15759
2020-12-01T00:00:00Z
ddc:004
open_access
Dagstuhl Manifestos, Table of Contents, Volume 8, Issue 1, 2020
Table of Contents
Frontmatter
Dagstuhl Manifestos, Table of Contents, Volume 8, Issue 1, 2020
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
2020
Is Part Of Dagstuhl Manifestos, Volume 8, Issue 1 (2020)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.8.1.i
urn:nbn:de:0030-drops-157595
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.8.1.i
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:13237
2020-11-24T00:00:00Z
ddc:004
open_access
Implementing FAIR Data Infrastructures (Dagstuhl Perspectives Workshop 18472)
Manola, Natalia
Mutschke, Peter
Scherp, Guido
Tochtermann, Klaus
Wittenburg, Peter
Gregory, Kathleen
Hasselbring, Wilhelm
den Heijer, Kees
Manghi, Paolo
Van Uytvanck, Dieter
fair principles
open data
open science
research data infrastructures
The open science movement is gaining strength and momentum worldwide, signalling a fundamental shift in how scientific research is made accessible and reusable. In order to fulfill the promises of open science, reliable and sustainable research data infrastructures must be developed. While the FAIR data principles provide a promising conceptual basis for developing such data infrastructures, they do not provide technological guidance on how to do so.
Computer science is uniquely situated to fill this gap by researching and developing tools and technical specifications which can help to realize the creation of FAIR data infrastructures. To this end, this Dagstuhl Perspectives Workshop brought together computer scientists and digital infrastructure experts from across disciplinary domains to discuss key challenges and technical solutions to implementing and promoting the establishment of FAIR-compliant infrastructures for research data. This manifesto reports the findings from the workshop and provides recommendations along two lines: (1) how computer science can contribute to implementing FAIR data infrastructures and (2) how to make computer science research itself more FAIR.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Natalia Manola and Peter Mutschke and Guido Scherp and Klaus Tochtermann and Peter Wittenburg and Kathleen Gregory and Wilhelm Hasselbring and Kees den Heijer and Paolo Manghi and Dieter Van Uytvanck
2020
Is Part Of Dagstuhl Manifestos, Volume 8, Issue 1 (2020)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.8.1.1
urn:nbn:de:0030-drops-132376
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.8.1.1
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:15760
2021-12-01T00:00:00Z
ddc:004
open_access
Dagstuhl Manifestos, Volume 9, Issue 1, January – December 2021, Complete Issue
Dagstuhl Manifestos, Volume 9, Issue 1, January – December 2021, Complete Issue
Dagstuhl Manifestos, Volume 9, Issue 1, January – December 2021, Complete Issue
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
2021
Is Part Of Dagstuhl Manifestos, Volume 9, Issue 1 (2021)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.9.1
urn:nbn:de:0030-drops-157608
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.9.1
eng
https://creativecommons.org/licenses/by/4.0/legalcode
oai:drops-oai.dagstuhl.de:15761
2021-12-01T00:00:00Z
ddc:004
open_access
Dagstuhl Manifestos, Table of Contents, Volume 9, Issue 1, 2021
Dagstuhl Manifestos
Table of Contents
Volume 9
Issue 1
2021
Dagstuhl Manifestos, Table of Contents, Volume 9, Issue 1, 2021
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
2021
Is Part Of Dagstuhl Manifestos, Volume 9, Issue 1 (2021)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.9.1.i
urn:nbn:de:0030-drops-157616
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.9.1.i
eng
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oai:drops-oai.dagstuhl.de:13744
2021-03-31T00:00:00Z
ddc:004
open_access
Web Futures: Inclusive, Intelligent, Sustainable The 2020 Manifesto for Web Science (Dagstuhl Perspectives Workshop 18262)
Berendt, Bettina
Gandon, Fabien
Halford, Susan
Hall, Wendy
Hendler, Jim
Kinder-Kurlanda, Katharina E.
Ntoutsi, Eirini
Staab, Steffen
Web Science
Artificial Intelligence
Web Governance
Capacity Building
This Manifesto was produced from the Perspectives Workshop 18262 entitled "10 Years of Web Science" that took place at Schloss Dagstuhl from June 24 – 29, 2018. At the Workshop, we revisited the origins of Web Science, explored the challenges and opportunities of the Web, and looked ahead to potential futures for both the Web and Web Science.
We explain issues that society faces in the Web by the ambivalences that are inherent in the Web. All the enormous benefits that the Web offers - for information sharing, collective organization and distributed activity, social inclusion and economic growth - will always carry along negative consequences, too, and 30 years after its creation negative consequences of the Web are only too apparent.
The Web continues to evolve and its next major step will involve Artificial Intelligence (AI) at large. AI has the potential to amplify positive and negative outcomes, and we explore these possibilities, situating them within the wider debate about the future of regulation and governance for the Web. Finally, we outline the need to extend Web Science as the science that is devoted to the analysis and engineering of the Web, to strengthen our role in shaping the future of the Web and present five key directions for capacity building that are necessary to achieve this: (i), supporting interdisciplinarity, (ii), supporting collaboration, (iii), supporting the sustainable Web, (iv), supporting the Intelligent Web, and (v), supporting the Inclusive Web.
Our writing reflects our background in several disciplines of the social and technical sciences and that these disciplines emphasize topics to various extents. We are acutely aware that our observations occupy a particular point in time and are skewed towards our experience as Western scholars - a limitation that Web Science will need to overcome.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Bettina Berendt and Fabien Gandon and Susan Halford and Wendy Hall and Jim Hendler and Katharina E. Kinder-Kurlanda and Eirini Ntoutsi and Steffen Staab
2021
Is Part Of Dagstuhl Manifestos, Volume 9, Issue 1 (2021)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.9.1.1
urn:nbn:de:0030-drops-137443
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.9.1.1
eng
https://creativecommons.org/licenses/by/4.0/legalcode
oai:drops-oai.dagstuhl.de:13745
2021-03-31T00:00:00Z
ddc:004
open_access
Diversity in News Recommendation (Dagstuhl Perspectives Workshop 19482)
Bernstein, Abraham
de Vreese, Claes
Helberger, Natali
Schulz, Wolfgang
Zweig, Katharina
Baden, Christian
Beam, Michael A.
Hauer, Marc P.
Heitz, Lucien
Jürgens, Pascal
Katzenbach, Christian
Kille, Benjamin
Klimkiewicz, Beate
Loosen, Wiebke
Moeller, Judith
Radanovic, Goran
Shani, Guy
Tintarev, Nava
Tolmeijer, Suzanne
van Atteveldt, Wouter
Vrijenhoek, Sanne
Zueger, Theresa
News
recommender systems
diversity
News diversity in the media has for a long time been a foundational and uncontested basis for ensuring that the communicative needs of individuals and society at large are met. Today, people increasingly rely on online content and recommender systems to consume information challenging the traditional concept of news diversity. In addition, the very concept of diversity, which differs between disciplines, will need to be re-evaluated requiring an interdisciplinary investigation, which requires a new level of mutual cooperation between computer scientists, social scientists, and legal scholars. Based on the outcome of a interdisciplinary workshop, we have the following recommendations, directed at researchers, funders, legislators, regulators, and the media industry:
- Conduct interdisciplinary research on news recommenders and diversity.
- Create a safe harbor for academic research with industry data.
- Strengthen the role of public values in news recommenders.
- Create a meaningful governance framework for news recommenders.
- Fund a joint lab to spearhead the needed interdisciplinary research, boost practical innovation, develop reference solutions, and transfer insights into practice.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Abraham Bernstein and Claes de Vreese and Natali Helberger and Wolfgang Schulz and Katharina Zweig and Christian Baden and Michael A. Beam and Marc P. Hauer and Lucien Heitz and Pascal Jürgens and Christian Katzenbach and Benjamin Kille and Beate Klimkiewicz and Wiebke Loosen and Judith Moeller and Goran Radanovic and Guy Shani and Nava Tintarev and Suzanne Tolmeijer and Wouter van Atteveldt and Sanne Vrijenhoek and Theresa Zueger
2021
Is Part Of Dagstuhl Manifestos, Volume 9, Issue 1 (2021)
Article
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DagMan.9.1.43
urn:nbn:de:0030-drops-137456
https://drops.dagstuhl.de/entities/document/10.4230/DagMan.9.1.43
eng
https://creativecommons.org/licenses/by/4.0/legalcode
oai:drops-oai.dagstuhl.de:3600
2012-08-23T00:00:00Z
ddc:004
open_access
DFU, Volume 1, Scientific Visualization: Advanced Concepts, Complete Volume
Hagen, Hans
Computer Graphics, Image Processing and Computer Vision, Physical Sciences and Engineering, Life and Medical Sciences
DFU, Volume 1, Scientific Visualization: Advanced Concepts, Complete Volume
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Hans Hagen
2012
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
Collection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010
urn:nbn:de:0030-drops-36002
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2692
2010-08-02T00:00:00Z
ddc:004
open_access
Frontmatter, Table of Contents, Preface
Hagen, Hans
Frontmatter
Table of Contents
Preface
Frontmatter. Table of contents. Preface.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Hans Hagen
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.I
urn:nbn:de:0030-drops-26928
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.I
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2693
2010-08-02T00:00:00Z
ddc:004
open_access
Generalized Hyper-cylinders: a Mechanism for Modeling and Visualizing N-D Objects
Ward, Matthew O.
Guo, Zhenyu
N-Dimensional Visualization
Cluster Visualization
The display of surfaces and solids has usually been restricted to the domain of scientific visualization; however, little work has been done on the visualization of surfaces and solids of dimensionality higher than three or four. Indeed, most high-dimensional visualization focuses on the display of data points. However, the ability to effectively model and visualize higher dimensional objects such as clusters and patterns would be quite useful in studying their shapes, relationships, and changes over time.
In this paper we describe a method for the description, extraction, and visualization of N-dimensional surfaces and solids. The approach is to extend generalized cylinders, an object representation used in geometric modeling and computer vision, to arbitrary dimensionality, resulting in what we term Generalized Hyper-cylinders (GHCs). A basic GHC consists of two N-dimensional hyper-spheres connected by a hyper-cylinder whose shape at any point along the cylinder is determined by interpolating between the endpoint shapes. More complex GHCs involve alternate cross-section shapes and curved spines connecting the ends. Several algorithms for constructing or extracting GHCs from multivariate data sets are proposed. Once extracted, the GHCs can be visualized using a variety of projection techniques and methods toconvey cross-section shapes.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Matthew O. Ward and Zhenyu Guo
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.1
urn:nbn:de:0030-drops-26937
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.1
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2694
2010-08-02T00:00:00Z
ddc:004
open_access
Computing an Optimal Layout for Cone Trees
Zeckzer, Dirk
Chen, Fang
Hagen, Hans
Cone Trees
Information Visualization
Tree Layout
Many visual representations for trees have been developed in information and software visualization. One of them are cone trees, a well-known three-dimensional representation for trees. This paper is based on an approach for constructing cone trees bottom-up. For this approach, an optimal layout for these trees is given together with a proof that based on the assumptions, there can be no better layouts. This comprises special cases, an optimal constant for the general case, and a post-processing step improving the layout.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Dirk Zeckzer and Fang Chen and Hans Hagen
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.11
urn:nbn:de:0030-drops-26947
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.11
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2695
2010-08-02T00:00:00Z
ddc:004
open_access
Generalized Swap Operation for Tetrahedrizations
Lehner, Burkhard
Hamann, Bernd
Umlauf, Georg
3D Triangulation
Geometric Conditions
Swap Operations
Mesh optimization of 2D and 3D triangulations is used in multiple applications extensively. For example, mesh optimization is crucial in the context of adaptively discretizing geometry, typically representing the geometrical boundary conditions of a numerical simulation, or adaptively discretizing the entire space over which various dependent variables of a numerical simulation must be approximated. Together with operations applied to the vertices the so-called edge or face swap operations are the building block of all optimization approaches. To speed up the optimization or to avoid local minima of the function measuring overall mesh quality these swaps are combined to generalized swap operations with a less local impact on the triangulation.
Despite the fact that these swap operations change only the connectivity of a triangulation, it depends on the geometry of the triangulation whether the generalized swap will generate inconsistently oriented or degenerate simplices. Because these are undesirable for numerical reasons, this paper is concerned with geometric criteria that guarantee the generalized swaps for a 3D triangulation to yield only valid, non-degenerate triangulations.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Burkhard Lehner and Bernd Hamann and Georg Umlauf
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.30
urn:nbn:de:0030-drops-26956
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.30
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2696
2010-08-02T00:00:00Z
ddc:004
open_access
On Curved Simplicial Elements and Best Quadratic Spline Approximation for Hierarchical Data Representation
Hamann, Bernd
Approximation
Bisection
Grid Generation
Finite Elements
Hierarchical Approximation
Simplicial Decomposition
Spline
We present a method for hierarchical data approximation using curved quadratic simplicial elements for domain decomposition. Scientific data defined over two- or three-dimensional domains typically contain boundaries and discontinuities that are to be preserved and approximated well for data analysis and visualization. Curved simplicial elements make possible a better representation of curved geometry, domain boundaries, and discontinuities than simplicial elements with non-curved edges and faces. We use quadratic basis functions and compute best quadratic simplicial spline approximations that are $C^0$-continuous everywhere except where field discontinuities occur whose locations we assume to be given. We adaptively refine a simplicial approximation by identifying and bisecting simplicial elements with largest errors. It is possible to store multiple approximation levels of increasing quality. Our method can be used for hierarchical data processing and visualization.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Bernd Hamann
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.45
urn:nbn:de:0030-drops-26960
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.45
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2697
2010-08-02T00:00:00Z
ddc:004
open_access
Towards Automatic Feature-based Visualization
Jänicke, Heike
Scheuermann, Gerik
Feature Detection Techniques
Feature-based Visualization
Local Statistical Complexity
Visualizations are well suited to communicate large amounts of complex data. With increasing resolution in the spatial and temporal domain simple imaging techniques meet their limits, as it is quite difficult to display multiple variables in 3D or analyze long video sequences. Feature detection techniques reduce the data-set to the essential structures and allow for a highly abstracted representation of the data. However, current feature detection algorithms commonly rely on a detailed description of each individual feature. In this paper, we present a feature-based visualization technique that is solely based on the data. Using concepts from computational mechanics and information theory, a measure, local statistical complexity, is defined that extracts distinctive structures in the data-set. Local statistical complexity assigns each position in the (multivariate) data-set a scalar value indicating regions with extraordinary behavior. Local structures with high local statistical complexity form the features of the data-set. Volume-rendering and iso-surfacing are used to visualize the automatically extracted features of the data-set. To illustrate the ability of the technique, we use examples from diffusion, and flow simulations in two and three dimensions.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Heike Jänicke and Gerik Scheuermann
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.62
urn:nbn:de:0030-drops-26976
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.62
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2698
2010-08-02T00:00:00Z
ddc:004
open_access
CSG Operations of Arbitrary Primitives with Interval Arithmetic and Real-Time Ray Casting
Hijazi, Younis
Knoll, Aaron
Schott, Mathias
Kensler, Andrew
Hansen, Charles
Implicit Surface
Constructive Solid Geometry
Interval Arithmetic
Ray Casting
We apply Knoll et al.'s algorithm [Knoll et al., "Fast ray tracing of arbitrary implicit surfaces with interval and affine arithmetic.", Comput. Graph. Forum, 28(1):26–40, 2009] to interactively ray-cast constructive solid geometry (CSG) objects of arbitrary primitives represented as implicit functions. Whereas modeling globally with implicit surfaces suffers from a lack of control, implicits are well-suited for arbitrary primitives and can be combined through various operations. The conventional way to represent union and intersection with interval arithmetic (IA) is simply using min and max but other operations such as the product of two forms can be useful in modeling joints between multiple objects.
Typical primitives are objects of simple shape, e.g. cubes, cylinders, spheres, etc. Our method handles arbitrary primitives, e.g. superquadrics or non-algebraic implicits. Subdivision and interval arithmetic guarantee robustness whereas GPU ray casting allows for fast and aesthetic rendering. Indeed, ray casting parallelizes efficiently and trivially and thus takes advantage of the continuous increasing computational power of hardware (CPUs and GPUs); moreover it lends itself to multi-bounce effects, such as shadows and transparency, which help for the visualization of complicated objects. With our system, we are able to render multi-material CSG trees of implicits robustly, in interactive time and with good visual quality.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Younis Hijazi and Aaron Knoll and Mathias Schott and Andrew Kensler and Charles Hansen
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.78
urn:nbn:de:0030-drops-26986
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.78
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2699
2010-08-02T00:00:00Z
ddc:004
open_access
Exploring Visualization Methods for Complex Variables
Hanson, Andrew J.
Sha, Ji-Ping
Visualization
Complex Manifolds
High Dimensions
Applications of complex variables and related manifolds appear throughout mathematics and science. Here we review a family of basic methods for applying visualization concepts to the study of complex variables and the properties of specific complex manifolds. We begin with an outline of the methods we can employ to directly visualize poles and branch cuts as complex functions of one complex variable. $CP^2$ polynomial methods and their higher analogs can then be exploited to produce visualizations of Calabi-Yau spaces such as those modeling the hypothesized hidden dimensions of string theory. Finally, we show how the study of N-boson scattering in dual model/string theory leads to novel cross-ratio-space methods for the treatment of analysis in two or more complex variables.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Andrew J. Hanson and Ji-Ping Sha
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.90
urn:nbn:de:0030-drops-26996
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.90
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2700
2010-08-02T00:00:00Z
ddc:004
open_access
Tensor Field Reconstruction Based on Eigenvector and Eigenvalue Interpolation
Hotz, Ingrid
Sreevalsan-Nair, Jaya
Hagen, Hans
Hamann, Bernd
Tensor Field
Eigenvector
Eigenvalue
Interpolation
Interpolation is an essential step in the visualization process. While most data from simulations or experiments are discrete many visualization methods are based on smooth, continuous data approximation or interpolation methods. We introduce a new interpolation method for symmetrical tensor fields given on a triangulated domain. Differently from standard tensor field interpolation, which is based on the tensor components, we use tensor invariants, eigenvectors and eigenvalues, for the interpolation. This interpolation minimizes the number of eigenvectors and eigenvalues computations by restricting it to mesh vertices and makes an exact integration of the tensor lines possible. The tensor field topology is qualitatively the same as for the component wise-interpolation. Since the interpolation decouples the ``shape'' and ``direction'' interpolation it is shape-preserving, what is especially important for tracing fibers in diffusion MRI data.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Ingrid Hotz and Jaya Sreevalsan-Nair and Hans Hagen and Bernd Hamann
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.110
urn:nbn:de:0030-drops-27003
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.110
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2701
2010-08-02T00:00:00Z
ddc:004
open_access
Tracking Lines in Higher Order Tensor Fields
Hlawitschka, Mario
Scheuermann, Gerik
Tensor Field
Line Tracking
While tensors occur in many areas of science and engineering, little has been done to visualize tensors with order higher than two. Tensors of higher orders can be used for example to describe complex diffusion patterns in magnetic resonance imaging (MRI). Recently, we presented a method for tracking lines in higher order tensor fields that is a generalization of methods known from first order tensor fields (vector fields) and symmetric second order tensor fields. Here, this method is applied to magnetic resonance imaging where tensor fields are used to describe diffusion patterns for example of hydrogen in the human brain. These patterns align to the internal structure and can be used to analyze interconnections between different areas of the brain, the so called tractography problem. The advantage of using higher order tensor lines is the ability to detect crossings locally, which is not possible in second order tensor fields. In this paper, the theoretical details will be extended and tangible results will be given on MRI data sets.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Mario Hlawitschka and Gerik Scheuermann
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.124
urn:nbn:de:0030-drops-27013
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.124
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2702
2010-08-02T00:00:00Z
ddc:004
open_access
Illustrative Focus+Context Approaches in Interactive Volume Visualization
Bruckner, Stefan
Gröller, M. Eduard
Mueller, Klaus
Preim, Bernhard
Silver, Deborah
Illustrative Visualization
Volumetric Data
Illustrative techniques are a new and exciting direction in visualization research. Traditional techniques which have been used by scientific illustrators for centuries are re-examined under the light of modern computer technology. In this paper, we discuss the use of the focus+context concept for the illustrative visualization of volumetric data. We give an overview of the state-of-the-art and discuss recent approaches which employ this concept in novel ways.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Stefan Bruckner and M. Eduard Gröller and Klaus Mueller and Bernhard Preim and Deborah Silver
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.136
urn:nbn:de:0030-drops-27023
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.136
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2703
2010-08-02T00:00:00Z
ddc:004
open_access
Model-Based Visualization for Intervention Planning
Preim, Bernhard
Model-based Visualization
Surface Visualization
Illustrative Rendering
Computer support for intervention planning is often a two-stage process: In a first stage, the relevant segmentation target structures are identified and delineated. In a second stage, image analysis results are employed for the actual planning process. In the first stage, model-based segmentation techniques are often used to reduce the interaction effort and increase the reproducibility. There is a similar argument to employ model-based techniques for the visualization as well. With increasingly more visualization options, users have many parameters to adjust in order to generate expressive visualizations. Surface models may be smoothed with a variety of techniques and parameters. Surface visualization and illustrative rendering techniques are controlled by a large set of additional parameters. Although interactive 3d visualizations should be flexible and support individual planning tasks, appropriate selection of visualization techniques and presets for their parameters is needed. In this chapter, we discuss this kind of visualization support. We refer to model-based visualization to denote the selection and parameterization of visualization techniques based on 'a priori knowledge concerning visual perception, shapes of anatomical objects and intervention planning tasks.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Bernhard Preim
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.163
urn:nbn:de:0030-drops-27033
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.163
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2704
2010-08-02T00:00:00Z
ddc:004
open_access
Pre-operative Planning and Intra-operative Guidance for Shoulder Replacement Surgery
Botha, Charl P.
Krekel, Peter R.
Valstar, Edward R.
de Bruin, Paul W.
Rozing, P.M.
Surgery Assistance
Shoulder joint replacement, or arthroplasty, is indicated in cases where arthritis or trauma has resulted in severe joint damage that in turn causes increased pain and decreased function. However, shoulder arthroplasty is less successful than hip and knee replacement, mostly due to the complexity of the shoulder joint and the resultant complexity of the replacement operation.
In this paper we present a complete visualization-oriented pre-operative planning and intra-operative guidance approach for shoulder joint replacement. Our system assists the surgeon by allowing a virtual arthroplasty procedure whilst giving feedback, primarily via patient- and procedure-specific joint range of motion (ROM) simulation and visualization. After a successful planning, our system automatically generates a 3D model of a patient-specific mechanical guidance device that is then produced by a rapid prototyping machine and can be used during the operation. In this way, a computer-based guidance system is not required in the operating room.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Charl P. Botha and Peter R. Krekel and Edward R. Valstar and Paul W. de Bruin and P.M. Rozing
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.179
urn:nbn:de:0030-drops-27049
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.179
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2705
2010-08-02T00:00:00Z
ddc:004
open_access
Patient-Specific Mappings between Myocardial and Coronary Anatomy
Termeer, Maurice
Bescós, Javier Oliván
Breeuwer, Marcel
Vilanova, Anna
Gerritsen, Frans
Voronoi Diagram
Segmentation
Myocardium
The segmentation of the myocardium based on the 17-segment model as recommended by the American Heart Association is widely used in medical practice. The patient-specific coronary anatomy does not play a role in this model. Due to large variations in coronary anatomy among patients, this can result in an inaccurate mapping between myocardial segments and coronary arteries. We present two approaches to include the patient-specific coronary anatomy in this mapping. The first approach adapts the 17-segment model to fit the patient. The second approach generates a less constrained mapping that does not necessarily conform to this model. Both approaches are based on a Voronoi diagram computation of the primary coronary arteries using geodesic distances along the epicardium in three-dimensional space. We demonstrate both our approaches with several patients and show how our first approach can also be used to fit volume data to the 17-segment model. Our technique gives detailed insight into the coronary anatomy in a single diagram. Based on the feedback provided by clinical experts we conclude that it has the potential to provide a more accurate relation between deficiencies in the myocardium and the supplying coronary arteries.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Maurice Termeer and Javier Oliván Bescós and Marcel Breeuwer and Anna Vilanova and Frans Gerritsen
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.196
urn:nbn:de:0030-drops-27053
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.196
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2706
2010-08-02T00:00:00Z
ddc:004
open_access
Modeling and Visualization of Cardiovascular Systems
Wischgoll, Thomas
Volumetric Data
Curve-skeleton
Cardiovascular Structure
Modeling complex organs, such as the human heart, requires a detailed understanding of the geometric and mechanical properties of that organ. Similarly, the model is only as accurate as the precision of the underlying properties allow. Hence, it is of great importance that accurate measurements of the geometric configuration are available. This paper describes the different steps that are necessary for creating and visualizing such a vascular model, ranging from determining a basic geometric model, gathering statistical data necessary to extend an existing model up to the visualization of the resulting large-scale vascular models.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Thomas Wischgoll
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.210
urn:nbn:de:0030-drops-27061
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.210
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2707
2010-08-02T00:00:00Z
ddc:004
open_access
From Visualization to Visually Enabled Reasoning
Meyer, Joerg
Thomas, Jim
Diehl, Stephan
Fisher, Brian
Keim, Daniel A.
Interactive Visualization
Reasoning
Interactive Visualization has been used to study scientific phenomena, analyze data, visualize information, and to explore large amounts of multi-variate data. It enables the human mind to gain novel insights by empowering the human visual system, encompassing the brain and the eyes, to discover properties that were previously unknown. While it is believed that the process of creating interactive visualizations is reasonably well understood, the process of stimulating and enabling human reasoning with the aid of interactive visualization tools is still a highly unexplored field.
We hypothesize that visualizations make an impact if they successfully influence a thought process or a decision. Interacting with visualizations is part of this process. We present exemplary cases where visualization was successful in enabling human reasoning, and instances where the interaction with data helped in understanding the data and making a better informed decision.
We suggest metrics that help in understanding the evolution of a decision making process. Such a metric would measure the efficiency of the reasoning process, rather than the performance of the visualization system or the user. We claim that the methodology of interactive visualization, which has been studied to a great extent, is now sufficiently mature, and we would like to provide some guidance regarding the evaluation of knowledge gain through visually enabled reasoning. It is our ambition to encourage the reader to take on the next step and move from information visualization to visually enabled reasoning.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Joerg Meyer and Jim Thomas and Stephan Diehl and Brian Fisher and Daniel A. Keim
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.227
urn:nbn:de:0030-drops-27078
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.227
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2708
2010-08-02T00:00:00Z
ddc:004
open_access
Visual Simulation of Flow
Kaufman, Arie
Zhao, Ye
Lattice Boltzmann Method
Amorphous phenomena
GPU Acceleration
Computational Fluid Dynamics
Urban Security
We have adopted a numerical method from computational fluid dynamics, the Lattice Boltzmann Method (LBM), for real-time simulation and visualization of flow and amorphous phenomena, such as clouds, smoke, fire, haze, dust, radioactive plumes, and air-borne biological or chemical agents. Unlike other approaches, LBM discretizes the micro-physics of local interactions and can handle very complex boundary conditions, such as deep urban canyons, curved walls, indoors, and dynamic boundaries of moving objects. Due to its discrete nature, LBM lends itself to multi-resolution approaches, and its computational pattern, which is similar to cellular automata, is easily parallelizable. We have accelerated LBM on commodity graphics processing units (GPUs), achieving real-time or even accelerated real-time on a single GPU or on a GPU cluster. We have implemented a 3D urban navigation system and applied it in New York City with real-time live sensor data. In addition to a pivotal application in simulation of airborne contaminants in urban environments, this approach will enable the development of other superior prediction simulation capabilities, computer graphics and games, and a novel technology for computational science and engineering.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Arie Kaufman and Ye Zhao
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.246
urn:nbn:de:0030-drops-27080
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.246
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2709
2010-08-02T00:00:00Z
ddc:004
open_access
Local and Global Illumination in the Volume Rendering Integral
Max, Nelson
Chen, Min
Volume Rendering
Illumination Model
This article is intended as an update of the major survey by Max [Max, "Optical models for direct volume rendering.", IEEE Trans. on Visualization and Computer Graphics, 1(2):99–108, 1995] on optical models for direct volume rendering. It provides a brief overview of the subject scope covered by [Max, "Optical models for direct volume rendering.", IEEE Trans. on Visualization and Computer Graphics, 1(2):99–108, 1995], and brings recent developments, such as new shadow algorithms and refraction rendering, into the perspective. In particular, we examine three fundamentals aspects of direct volume rendering, namely the volume rendering integral, local illumination models and global illumination models, in a wavelength-independent manner. We review the developments on spectral volume rendering, in which visible light are considered as a form of electromagnetic radiation, optical models are implemented in conjunction with representations of spectral power distribution. This survey can provide a basis for, and encourage, new efforts for developing and using complex illumination models to achieve better realism and perception through optical correctness.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Nelson Max and Min Chen
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.259
urn:nbn:de:0030-drops-27090
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.259
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2710
2010-08-02T00:00:00Z
ddc:004
open_access
Real-time Terrain Mapping
Bernardin, Tony
Cowgil, Eric
Gold, Ryan
Hamann, Bernd
Kreylos, Oliver
Earth
Space
and Environmental Sciences Visualization
Interaction
Terrain Visualization
Multiresolution Visualization
We present an interactive, real-time mapping system for digital elevation maps (DEMs), which allows Earth scientists to map and therefore understand the deformation of the continental crust at length scales of 10m to 1000km. Our system visualizes the surface of the Earth as a 3D~surface generated from a DEM, with a color texture generated from a registered multispectral image and vector-based mapping elements draped over it. We use a quadtree-based multiresolution method to be able to render high-resolution terrain mapping data sets of large spatial regions in real time. The main strength of our system is the combination of interactive rendering and interactive mapping directly onto the 3D~surface, with the ability to navigate the terrain and to change viewpoints arbitrarily during mapping. User studies and comparisons with commercially available mapping software show that our system improves mapping accuracy and efficiency, and also enables qualitatively different observations that are not possible to make with existing systems.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Tony Bernardin and Eric Cowgil and Ryan Gold and Bernd Hamann and Oliver Kreylos
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.275
urn:nbn:de:0030-drops-27106
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.275
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2711
2010-08-02T00:00:00Z
ddc:004
open_access
A Survey of Visualization Methods for Special Relativity
Weiskopf, Daniel
Special Relativity
Minkowski
Spacetime
Virtual Camera
This paper provides a survey of approaches for special relativistic visualization. Visualization techniques are classified into three categories: Minkowski spacetime diagrams, depictions of spatial slices at a constant time, and virtual camera methods that simulate image generation in a relativistic scenario. The paper covers the historical outline from early hand-drawn visualizations to state-of-the-art computer-based visualization methods. This paper also provides a concise presentation of the mathematics of special relativity, making use of the geometric nature of spacetime and relating it to geometric concepts such vectors and linear transformations.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Daniel Weiskopf
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.289
urn:nbn:de:0030-drops-27115
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.289
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2712
2010-08-02T00:00:00Z
ddc:004
open_access
Audio-visual Virtual Reality System for Room Acoustics
Deines, Eduard
Hering-Bertram, Martin
Mohring, Jan
Jegorovs, Jevgenijs
Hagen, Hans
Special Relativity
Minkowski
Spacetime
Virtual Camera
We present an audio-visual Virtual Reality display system for simulated sound fields. In addition to the room acoustic simulation by means of phonon tracing and finite element method this system includes the stereoscopic visualization of simulation results using a 3D back projection system as well as auralization by use of a professional sound equipment. For auralization purposes we develop a sound field synthesis approach for accurate control of the loudspeaker system.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Eduard Deines and Martin Hering-Bertram and Jan Mohring and Jevgenijs Jegorovs and Hans Hagen
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.303
urn:nbn:de:0030-drops-27128
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.303
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2713
2010-08-02T00:00:00Z
ddc:004
open_access
Saliency Guided Summarization of Molecular Dynamics Simulations
Patro, Robert
Ip, Cheuk Yiu
Varshney, Amitabh
Molecuar Dynamics
Saliency
Simulation
We present a novel method to measure saliency in molecular dynamics simulation data. This saliency measure is based on a multiscale center-surround mechanism, which is fast and efficient to compute. We explore the use of the saliency function to guide the selection of representative and anomalous timesteps for summarization of simulations. To this end, we also introduce a multiscale keyframe selection procedure which automatically provides keyframes representing the simulation at varying levels of coarseness. We compare our saliency guided keyframe approach against other methods, and show that it consistently selects superior keyframes as measured by their predictive power in reconstructing the simulation.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Robert Patro and Cheuk Yiu Ip and Amitabh Varshney
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.321
urn:nbn:de:0030-drops-27134
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.321
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:2714
2010-08-02T00:00:00Z
ddc:004
open_access
Streaming Aerial Video Textures
Co, Christopher S.
Duchaineau, Mark A.
Joy, Kenneth I.
Molecuar Dynamics
Saliency
Simulation
We present a streaming compression algorithm for huge time-varying aerial imagery. New airborne optical sensors are capable of collecting billion-pixel images at multiple frames per second. These images must be transmitted through a low-bandwidth pipe requiring aggressive compression techniques. We achieve such compression by treating foreground portions of the imagery separately from background portions. Foreground information consists of moving objects, which form a tiny fraction of the total pixels. Background areas are compressed effectively over time using streaming wavelet analysis to compute a compact video texture map that represents several frames of raw input images. This map can be rendered efficiently using an algorithm amenable to GPU implementation. The core algorithmic contributions of this work are methods for fast, low-memory streaming wavelet compression and efficient display of wavelet video textures resulting from such compression.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Christopher S. Co and Mark A. Duchaineau and Kenneth I. Joy
2010
Is Part Of Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.SciViz.2010.336
urn:nbn:de:0030-drops-27148
https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.336
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3601
2012-08-23T00:00:00Z
ddc:004
open_access
DFU, Volume 2, Scientific Visualization: Interactions, Features, Metaphors, Complete Volume
Hagen, Hans
Computer Graphics, Image Processing and Computer Vision, Physical Sciences and Engineering, Life and Medical Sciences
DFU, Volume 2, Scientific Visualization: Interactions, Features, Metaphors, Complete Volume
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Hans Hagen
2012
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
Collection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011
urn:nbn:de:0030-drops-36013
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3282
2011-10-26T00:00:00Z
ddc:004
open_access
Frontmatter, Table of Contents, Preface, List of Authors
Hagen, Hans
Frontmatter
Table of Contents
Preface
List of Authors
Frontmatter, Table of Contents, Preface, List of Authors
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Hans Hagen
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.i
urn:nbn:de:0030-drops-32822
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.i
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3284
2011-10-26T00:00:00Z
ddc:004
open_access
CakES: Cake Metaphor for Analyzing Safety Issues of Embedded Systems
Al-Zokari, Yasmin I.
Khan, Taimur
Schneider, Daniel
Zeckzer, Dirk
Hagen, Hans
Fault Tree Analysis
minimal cut sets
basic events
information visualization
scientific visualization
engineering
tiled-wall
multiple monitor sy
Embedded systems are used everywhere. They are complex systems whose failure may cause death or injury to people or may damage the environment are required to be safety safe. Therefore, these systems need to be analyzed. Fault tree analysis is a common way for performing safety analysis. It generates a large amount of interconnected data that itself needs to be analyzed to help different domain experts (e.g., engineers and safety analysts) in their decisions for improving the system’s safety. Additional difficulties occur for the experts in communication and in linking the data (e.g., information of basic events or minimal cut sets) to the actual parts of the system (model). Therefore, a large amount of time and effort is being spent on discussions, searching,and navigating through the data. To overcome this, we present a new metaphor called "CakES" consisting of multiple views visualizing the data generated by fault tree analysis and linking them to the actual parts of the model by intuitive interaction. Using the interaction techniques of CakES the user can directly explore the safety related data without navigating through the fault tree while retaining an overview of all critical aspects in the model.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Yasmin I. Al-Zokari and Taimur Khan and Daniel Schneider and Dirk Zeckzer and Hans Hagen
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.1
urn:nbn:de:0030-drops-32844
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.1
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3285
2011-10-26T00:00:00Z
ddc:004
open_access
2D Tensor Field Segmentation
Auer, Cornelia
Sreevalsan-Nair, Jaya
Zobel, Valentin
Hotz, Ingrid
Tensorfield visualization
surface topology
We present a topology-based segmentation as means for visualizing 2D symmetric tensor fields. The segmentation uses directional as well as eigenvalue characteristics of the underlying field to delineate cells of similar (or dissimilar) behavior in the tensor field. A special feature of the resulting cells is that their shape expresses the tensor behavior inside the cells and thus also can be considered as a kind of glyph representation. This allows a qualitative comprehension of important structures of the field. The resulting higher-level abstraction of the field provides valuable analysis. The extraction of the integral topological skeleton using both major and minor eigenvector fields serves as a structural pre-segmentation and renders all directional structures in the field. The resulting curvilinear cells are bounded by tensorlines and already delineate regions of equivalent eigenvector behavior. This pre-segmentation is further adaptively refined to achieve a segmentation reflecting regions of similar eigenvalue and eigenvector characteristics. Cell refinement involves both subdivision and merging of cells achieving a predetermined resolution, accuracy and uniformity of the segmentation. The buildingblocks of the approach can be intuitively customized to meet the demands or different applications. Application to tensor fields from numerical stress simulations demonstrates the effectiveness of our method.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Cornelia Auer and Jaya Sreevalsan-Nair and Valentin Zobel and Ingrid Hotz
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.17
urn:nbn:de:0030-drops-32853
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.17
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3286
2011-10-26T00:00:00Z
ddc:004
open_access
A
Balabanian, Jean-Paul
Gröller, Eduard
Illustrative Visualization
Integrated Visualization
This paper describes the concept of A-space. A-space is the space where visualization algorithms reside. Every visualization algorithm is a unique point in A-space. Integrated visualizations can be interpreted as an interpolation between known algorithms. The void between algorithms can be considered as a visualization opportunity where a new point in A-space can be reconstructed and new integrated visualizations can be created.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Jean-Paul Balabanian and Eduard Gröller
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.36
urn:nbn:de:0030-drops-32866
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.36
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3283
2011-10-26T00:00:00Z
ddc:004
open_access
Interpolants Induced by Marching Cases
Carr, Hamish
Murphy, Eoin
Interpolation
Marching Cubes
Isosurfaces
Visualization depends among other things on the interpolant used in generating images. One way to assess this is to construct case tables for Marching Cubes that represent the chosen interpolant accuracy. Instead, we show how to construct the interpolants induced by Marching Cases for comparison and assessment, how to extend this approach to Marching Squares, Cubes and Hypercubes, and how to construct an interpolant which is computationally equivalent to the digital rules conventionally used in image processing. Furthermore, we demonstrate that unlike tetrahedral meshes, geometric measurements over multi-linear mesh cells are inherently non-linear and cannot be summed as in the Contour Spectrum.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Hamish Carr and Eoin Murphy
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.48
urn:nbn:de:0030-drops-32837
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.48
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3287
2011-10-26T00:00:00Z
ddc:004
open_access
Comparative Visualization Using Cross-Mesh Field Evaluations and Derived Quantities
Childs, Hank
Ahern, Sean
Meredith, Jeremy
Miller, Mark
Joy, Kenneth I.
Comparative Visualization
Cross-Mesh Field Evaluation
Derived Quantity
We present a data-level comparative visualization system that utilizes two key pieces of technology: (1) cross-mesh field evaluation - algorithms to evaluate a field from one mesh onto another - and (2) a highly flexible system for creating new derived quantities. In contrast to previous comparative visualization efforts, which focused on "A-B" comparisons, our system is able to compare many related simulations in a single analysis. Types of possible novel comparisons include comparisons of ensembles of data generated through parameter studies, or comparisons of time-varying data. All portions of the system have been parallelized and our results are applicable to petascale data sets.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Hank Childs and Sean Ahern and Jeremy Meredith and Mark Miller and Kenneth I. Joy
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.59
urn:nbn:de:0030-drops-32870
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.59
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3288
2011-10-26T00:00:00Z
ddc:004
open_access
On the Computation of Integral Curves in Adaptive Mesh Refinement Vector Fields
Deines, Eduard
Weber, Gunther H.
Garth, Christoph
Van Straalen, Brian
Borovikov, Sergey
integration-based visualization
streamlines
interpolation
adaptive mesh refinement
Integral curves, such as streamlines, streaklines, pathlines, and timelines, are an essential tool in the analysis of vector field structures, offering straightforward and intuitive interpretation of visualization results. While such curves have a long-standing tradition in vector field visualization, their application to Adaptive Mesh Refinement (AMR) simulation results poses unique problems. AMR is a highly effective discretization method for a variety of physical simulation problems and has recently been applied to the study of vector fields in flow and magnetohydrodynamic applications. The cell-centered nature of AMR data and discontinuities in the vector field representation arising from AMR level boundaries complicate the application of numerical integration methods to compute integral curves. In this paper, we propose a novel approach to alleviate these problems and show its application to streamline visualization in an AMR model of the magnetic field of the solar system as well as to a simulation of two incompressible viscous vortex rings merging.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Eduard Deines and Gunther H. Weber and Christoph Garth and Brian Van Straalen and Sergey Borovikov
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.73
urn:nbn:de:0030-drops-32880
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.73
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3304
2011-10-26T00:00:00Z
ddc:004
open_access
Integrating Semantics into the Visualization Process
Escarza, Sebastian
Larrea, Martin L.
Urribarri, Dana K.
Castro, Silvia M.
Martig, Sergio R.
semantic driven visualization
ontology
visualization
knowledge representation
Most of today's visualization systems give the user considerable control over the visualization process. Many parameters might be changed until the obtention of a satisfactory visualization. The visualization process is a very complex exploration activity and, even for skilled users, it can be difficult to arrive at an effective visualization. We propose the construction of a visualization prototype to assist users and designers throughout the stages of the visualization process, and the integration of such process with a reasoning procedure that allows the configuration of the visualization, based on the entailed conclusions. We are working on a formal representation of the Visualization field. We aim to establish a common visualization vocabulary, include the underlying semantics, and enable the definition of visualization specifications that can be executed by a visualization engine with ontological support. An ontological description of a visualization
should be enough to specify the visualization and, thus, to generate a runtime environment that is able to bring that visualization to life. The visualization ontology defines the vocabulary. With the addition of inference rules to the system, we can derive conclusions about visualization properties that allow to enhance the visualization, and guide the user throughout the entire process toward an effective result.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Sebastian Escarza and Martin L. Larrea and Dana K. Urribarri and Silvia M. Castro and Sergio R. Martig
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.92
urn:nbn:de:0030-drops-33044
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.92
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3289
2011-10-26T00:00:00Z
ddc:004
open_access
Simulation and Visualization of Medical Application to the Inner Ear of the Guinea Pig to Reduce Animal Experiments
Hering-Bertram, Martin
Siedow, Norbert
Tse, Oliver
Plontke, Stefan K.
Gill, Ruth
Cochlea
Perilymph
Spiral Ligament
Round Window Application
Modiolar Communication Routes
Numerical Simulation
Parameter Identification
We present a novel approach to simulate drug application to the inner ear of the guinea pig with the goal to reduce animal experiments and to increase the accuracy of measurements. The framework is based on a tetrahedral grid representing the individual compartments of the cochlea, associated with a finite element model used to simulate medical diffusion and clearance. In a first simulation scenario, we were able to compute transfer coefficients between the inner compartments of the ear, validating experiments from the literature, and to prove the existence of clearance at the inner scala tympani. In a second scenario, the cochlea was unwound to obtain a one-dimensional model for efficient simulation-based transfer coefficient identification. These coefficients are useful to predict the impact of novel medication application systems.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Martin Hering-Bertram and Norbert Siedow and Oliver Tse and Stefan K. Plontke and Ruth Gill
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.103
urn:nbn:de:0030-drops-32895
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.103
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3290
2011-10-26T00:00:00Z
ddc:004
open_access
Information-theoretic Analysis of Unsteady Data
Jänicke, Heike
Information theory
unsteady data
The temporal evolution of scientific data is of high relevance in many fields of application. Understanding the dynamics over time is a crucial step in understanding the underlying system. The availability of large scale parallel computers has led to a finer and finer resolution of simulation data, which makes it difficult to detect all relevant changes of the system by watching a video or a set of snapshots. In recent years, algorithms for the automatic detection of coherent temporal structures have been developed that allow for an identification of interesting areas and time steps in unsteady data. With such techniques, the user can be guided to interesting subsets of the data or a video can be automatically created that does not occlude relevant aspects of the simulation. In this paper, we give an overview over the different techniques, show how their combination helps to gain deeper insight and look at different directions for further improvement. Two CFD simulations are used to illustrate the different techniques.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Heike Jänicke
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.118
urn:nbn:de:0030-drops-32908
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.118
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3303
2011-10-26T00:00:00Z
ddc:004
open_access
Construction of Implicit Surfaces from Point Clouds Using a Feature-based Approach
Keller, Patric
Kreylos, Oliver
Cowgill, Eric S.
Kellogg, Louise H.
Hering-Bertram, Martin
3D Point Clouds
Surface Reconstruction
Implicit Surfaces
We present a novel feature-based approach to surface generation from point clouds in three-dimensional space obtained by terrestrial and airborne laser scanning. In a first step, we apply a multiscale clustering and classification of local point set neighborhoods by considering their geometric shape. Corresponding feature values quantify the similarity to curve-like, surface-like, and solid-like shapes. For selecting and extracting surface features, we build a hierarchical trivariate B-spline representation of this surface feature
function. Surfaces are extracted with a variant of marching cubes (MC), providing an inner and outer shell that are merged into a single non-manifold surface component at the field’s ridges. By adapting the isovalue of the feature function the user may control surface topology and thus adapt the extracted features to the noise level of the underlying point cloud. User control and adaptive approximation make our method robust for noisy and complex point data.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Patric Keller and Oliver Kreylos and Eric S. Cowgill and Louise H. Kellogg and Martin Hering-Bertram
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.129
urn:nbn:de:0030-drops-33032
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.129
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3291
2011-10-26T00:00:00Z
ddc:004
open_access
Framework for Comprehensive Size and Resolution Utilization of Arbitrary Displays
Khan, Taimur
Schneider, Daniel
Al-Zokari, Yasmin
Zeckzer, Dirk
Hagen, Hans
Large and High-res Displays
Coordinated and Multiple Views
Human Computer Interaction
Scalable large high-resolution displays such as tiled displays are imperative for the visualization of large and complex datasets. In recent times, the relatively low costs for setting up large display systems have led to an highly increased usage of such devices. However, it is equally vital to optimally utilize their size and resolution to effectively explore such data through a combination of diverse visualizations, views, and interaction mechanisms. In this paper, we present a lightweight dispatcher framework which facilitates
input management, focus management, and the execution of several interrelated yet independent visualizations. The approach is deliberately kept flexible to not only tackle different hardware configurations but also the amount of visualization applications to be implemented. This is demonstrated through a scenario that executes four interrelated visualizations equally well on both a 5 PC tiled-wall and a single desktop. The key contribution of this work is the ability to extend the tiled-wall to work with multiple applications for enhanced size and resolution utilization of such displays.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Taimur Khan and Daniel Schneider and Yasmin Al-Zokari and Dirk Zeckzer and Hans Hagen
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.144
urn:nbn:de:0030-drops-32916
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.144
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3292
2011-10-26T00:00:00Z
ddc:004
open_access
Salient Frame Detection for Molecular Dynamics Simulations
Kim, Youngmin
Patro, Robert
Yiu Ip, Cheuk
O’Leary, Dianne P.
Anishkin, Andriy
Saliency based analysis
Molecular Dynamics
Simulation
Recent advances in sophisticated computational techniques have facilitated simulation of incrediblydetailed time-varying trajectories and in the process have generated vast quantities of simulation data. The current tools to analyze and comprehend large-scale time-varying data, however, lag far behind our ability to produce such simulation data. Saliency-based analysis can be applied to time-varying 3D datasets for the purpose of summarization, abstraction, and motion analysis. As the sizes of time-varying datasets continue to grow, it becomes more and more difficult to comprehend vast amounts of data and information in a short period of time. In this paper, we use eigenanalysis to generate orthogonal basis functions over sliding windows to characterize regions of unusual deviations and significant trends. Our results show that motion subspaces provide an effective technique for summarization of large molecular dynamics trajectories.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Youngmin Kim and Robert Patro and Cheuk Yiu Ip and Dianne P. O’Leary and Andriy Anishkin
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.160
urn:nbn:de:0030-drops-32926
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.160
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3293
2011-10-26T00:00:00Z
ddc:004
open_access
3D Reconstruction of Human Ribcage and Lungs and Improved Visualization of Lung X-ray Images Through Removal of the Ribcage
Koehler, Christopher
Wischgoll, Thomas
3D Reconstruction
X-ray images
The analysis of X-ray imagery is the standard pre-screening approach for lung cancer. Unlike CTscans, X-ray images only provide a 2D projection of the patient’s body. As a result occlusions, i.e. some body parts covering other areas of the body within this projected X-ray image, can make the analysis more difficult. For example, the ribs, a predominant feature within the X-ray image, can cover up cancerous nodules, making it difficult for the Computer Aided Diagnostic (CAD) systems or even a doctor to detect such nodules. Hence, this paper describes a methodology for reconstructing a patient-specific 3D model of the ribs and lungs based on a set of lateral and PA X-ray images, which allows the system to calculate simulated X-ray images of just the ribs. The simulated X-ray images can then be subtracted from the original PA X-ray image resulting in
an image where most of the cross hatching pattern caused by the ribs is removed to improve on automated diagnostic processes.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Christopher Koehler and Thomas Wischgoll
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.176
urn:nbn:de:0030-drops-32935
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.176
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3296
2011-10-26T00:00:00Z
ddc:004
open_access
A Visual Approach to Analysis of Stress Tensor Fields
Kratz, Andrea
Meyer, Björn
Hotz, Ingrid
Tensor Field
Visualization and Analysis
We present a visual approach for the exploration of stress tensor fields. In contrast to common tensor visualization methods that only provide a single view to the tensor field, we pursue the idea of providing various perspectives onto the data in attribute and object space. Especially in the context of stress tensors, advanced tensor visualization methods have a young tradition. Thus, we propose a combination of visualization techniques domain experts are used to with statistical views of tensor attributes. The application of this concept to tensor fields was achieved by extending the notion of shape space. It provides an intuitive way of finding tensor invariants that represent relevant physical properties. Using brushing techniques, the user can select features in attribute space, which are mapped to displayable entities in a three-dimensional hybrid visualization in object space. Volume rendering serves as context, while glyphs encode the whole tensor information in focus regions. Tensorlines can be included to emphasize directionally coherent features in the tensor field. We show that the benefit of such a multi-perspective approach is manifold. Foremost, it provides easy access to the complexity of tensor data. Moreover, including
well-known analysis tools, such as Mohr diagrams, users can familiarize themselves gradually with novel visualization methods. Finally, by employing a focus-driven hybrid rendering, we significantly reduce clutter, which was a major problem of other three-dimensional tensor visualization methods.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Andrea Kratz and Björn Meyer and Ingrid Hotz
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.188
urn:nbn:de:0030-drops-32962
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.188
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3295
2011-10-26T00:00:00Z
ddc:004
open_access
Abstract Feature Space Representation for Volumetric Transfer Function Exploration
Maciejewski, Ross
Jang, Yun
Ebert, David S.
Gaither, Kelly P.
Volumetric Transfer Function
Abstract Feature Space
The application of n-dimensional transfer functions for feature segmentation has become increasingly popular in volume rendering. Recent work has focused on the utilization of higher order dimensional transfer functions incorporating spatial dimensions (x,y, and z) along with traditional feature space dimensions (value and value gradient). However, as the dimensionality increases, it becomes exceedingly difficult to abstract the transfer function into an intuitive and interactive workspace. In this work we focus on populating the traditional two-dimensional histogram with a set of derived metrics from the spatial (x, y and z) and feature space (value, value gradient, etc.) domain to create a set of abstract feature space transfer function domains. Current two-dimensional transfer function widgets typically consist of a two-dimensional histogram where each entry in the histogram represents the number of voxels that maps to that entry. In the case of an abstract transfer function design, the amount of spatial variance at that histogram
coordinate is mapped instead, thereby relating additional information about the data abstraction in the projected space. Finally, a non-parametric kernel density estimation approach for feature space clustering is applied in the abstracted space, and the resultant transfer functions are discussed with respect to the space abstraction.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Ross Maciejewski and Yun Jang and David S. Ebert and Kelly P. Gaither
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.212
urn:nbn:de:0030-drops-32955
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.212
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3294
2011-10-26T00:00:00Z
ddc:004
open_access
Variational Level-Set Detection of Local Isosurfaces from Unstructured Point-based Volume Data
Molchanov, Vladimir
Rosenthal, Paul
Linsen, Lars
Level-set
isosurface extraction
visualization in astrophysics
particle simulations
A standard approach for visualizing scalar volume data is the extraction of isosurfaces. The most efficient methods for surface extraction operate on regular grids. When data is given on unstructured point-based samples, regularization can be applied but may introduce interpolation errors. We propose a method for smooth isosurface visualization that operates directly on unstructured point-based volume data avoiding any resampling. We derive a variational formulation for smooth local isosurface extraction using an implicit surface representation in form of a level-set approach, deploying Moving Least Squares (MLS) approximation, and operating on a kd-tree. The locality of our approach has two aspects: first, our algorithm extracts only those components of the isosurface, which intersect a subdomain of interest; second, the action of the main term in the governing equation is concentrated near the current isosurface position. Both aspects reduce the computation times per level-set iteration. As for most level-set methods a reinitialization
procedure is needed, but we also consider a modified algorithm where this step is eliminated. The final isosurface is extracted in form of a point cloud representation. We present a novel point completion
scheme that allows us to handle highly adaptive point sample distributions. Subsequently, splat-based or mere (shaded) point rendering is applied. We apply our method to several synthetic and real-world data sets to demonstrate its validity and efficiency.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Vladimir Molchanov and Paul Rosenthal and Lars Linsen
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.222
urn:nbn:de:0030-drops-32941
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.222
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3297
2011-10-26T00:00:00Z
ddc:004
open_access
Reflections on QuestVis: A Visualization System for an Environmental Sustainability Model
Munzner, Tamara
Barsky, Aaron
Williams, Matt
high-dimensional visualization
dimensionality reduction
linked views
simulation visualization
design study
We present lessons learned from the iterative design of QuestVis, a visualization interface for the QUEST environmental sustainability model. The QUEST model predicts the effects of policy choices in the present using scenarios of future outcomes that consist of several hundred indicators. QuestVis treats this information as a high-dimensional dataset, and shows the relationship between input choices and output indicators using linked views and a compact multilevel browser for indicator values. A first prototype also featured an overview of the space of all possible scenarios based on dimensionality reduction, but this representation was deemed to be be inappropriate for a target audience of people unfamiliar with data analysis. A second prototype with a considerably simplified and streamlined interface was created that supported comparison between multiple scenarios using a flexible approach to aggregation. However, QuestVis was not deployed because of a mismatch between the design goals of the project and the true needs of the target user community, who did not need to carry out detailed analysis of the high-dimensional dataset. We discuss this breakdown in the context of a nested model for visualization design and evaluation.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Tamara Munzner and Aaron Barsky and Matt Williams
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.240
urn:nbn:de:0030-drops-32970
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.240
eng
https://creativecommons.org/licenses/by-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3298
2011-10-26T00:00:00Z
ddc:004
open_access
Generation of Adaptive Streak Surfaces Using Moving Least Squares
Obermaier, Harald
Hering-Bertram, Martin
Kuhnert, Jörg
Hagen, Hans
scattered
flow
streak surface
adaptivity
moving least squares
We introduce a novel method for the generation of fully adaptive streak surfaces in time-varying flow fields based on particle advection and adaptive mesh refinement. Moving least squares approximation plays an important role in multiple stages of the proposed algorithm, which adaptively refines the surface based on curvature approximation and circumradius properties of the underlying Delaunay mesh. We utilize the grid-less Moving Least Squares approximation method for both curvature and surface estimation as well as vector field evaluation during particle advection. Delaunay properties of the surface triangulation are guaranteed by edge flipping operations on the progressive surface mesh. The results of this work illustrate the benefit of adaptivity techniques to streak surface generation and provide the means for a qualitative analysis of the presented approach.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Harald Obermaier and Martin Hering-Bertram and Jörg Kuhnert and Hans Hagen
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.260
urn:nbn:de:0030-drops-32982
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.260
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3305
2011-10-26T00:00:00Z
ddc:004
open_access
Interactive Isocontouring of High-Order Surfaces
Pagot, Christian
Vollrath, Joachim
Sadlo, Filip
Weiskopf, Daniel
Ertl, Thomas
Comba, João Luiz Dihl
High-order finite elements
isosurface visualization
GPU
Scientists and engineers are making increasingly use of hp-adaptive discretization methods to compute simulations. While techniques for isocontouring the high-order data generated by these methods have started to appear, they typically do not facilitate interactive data exploration. This work presents a novel interactive approach for approximate isocontouring of high-order data. The method is based on a two-phase hybrid rendering algorithm. In the first phase, coarsely seeded particles are guided by the gradient of the field for obtaining an initial sampling of the isosurface in object space. The second phase performs ray casting in the image space neighborhood of the initial samples. Since the neighborhood is small, the initial guesses tend to be close to the isosurface, leading to accelerated root finding and thus efficient rendering. The object space phase affects the density of the coarse samples on the isosurface, which can lead to holes in the final rendering and overdraw. Thus, we also propose a heuristic, based on dynamical systems theory, that adapts the neighborhood of the seeds in order to obtain a better coverage of the surface. Results for datasets from computational fluid dynamics are shown and performance measurements for our GPU implementation are given.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Christian Pagot and Joachim Vollrath and Filip Sadlo and Daniel Weiskopf and Thomas Ertl and João Luiz Dihl Comba
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.276
urn:nbn:de:0030-drops-33052
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.276
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3299
2011-10-26T00:00:00Z
ddc:004
open_access
HCI in Medical Visualization
Preim, Bernhard
Medical visualization
Human Computer Interaction
Input devices
Scenarios
Research in medical visualization lead to a remarkable collection
of algorithms for efficiently exploring medical imaging data, such
as CT, MRI and DTI. However, widespread use of such algorithms requires careful parameterization, integration of individual algorithms in solutions for real-world problems in diagnosis, treatment planning and intraoperative navigation. In the field of HCI, input devices, interaction techniques as well as a process for achieving usable, useful, and attractive user interfaces are explored. Findings from HCI may serve as a starting point to significantly improve visual computing solutions in medical diagnosis and treatment. We discuss general issues, such as input devices for medical visualization, and selected examples.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Bernhard Preim
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.292
urn:nbn:de:0030-drops-32999
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.292
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3300
2011-10-26T00:00:00Z
ddc:004
open_access
Visualizing Spatial Partitions
Rheingans, Penny
Bulka, Blazej
desJardins, Marie
geospatial visualization
heuristic search
color mapping
multivariate visualization
We describe an application of geospatial visualization and AI search techniques to the problem of school redistricting, in which students are assigned to home schools within a county or school district. This is a multicriteria optimization problem in which competing objectives must be considered, such as school capacity, busing costs, and socioeconomic distribution. Additionally, school assignments need to be made for three different levels (elementary, middle, and high school) in a way which allows children to move from one school to the next with a cohort of sufficient size. Because of the complexity of the decision-making problem, tools are needed to help end users
generate, evaluate, and compare alternative school assignment plans. A key goal of our research is to aid users in finding multiple qualitatively different redistricting plans that represent different
tradeoffs in the decision space. We present visualization techniques which can be used to visualize the quality of spatial partititioning plans, compare the alternatives presented by different plans, and understand the interrelationships of plans at different educational levels. We demonstrate these techniques on partitions created through both manual construction and intelligient search processes for the population data of the school district of Howard County, Maryland.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Penny Rheingans and Blazej Bulka and Marie desJardins
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.311
urn:nbn:de:0030-drops-33006
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.311
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3301
2011-10-26T00:00:00Z
ddc:004
open_access
Feature Extraction for DW-MRI Visualization: The State of the Art and Beyond
Schultz, Thomas
Diffusion-Weighted MRI
dMRI
DT-MRI
DTI
HARDI
Streamline Clustering
Edge Detection
DW-MRI Segmentation
Tensor Topology
Crease Surfaces
By measuring the anisotropic self-diffusion rates of water, Diffusion Weighted Magnetic Resonance Imaging (DW-MRI) provides a unique noninvasive probe of fibrous tissue. In particular, it has been explored widely for imaging nerve fiber tracts in the human brain. Geometric features provide a quick visual overview of the complex datasets that arise from DW-MRI. At the same time, they build a bridge towards quantitative analysis, by extracting explicit representations of structures in the data that are relevant to specific research questions. Therefore, features in DWMRI data are an active research topic not only within scientific visualization, but have received considerable interest from the medical image analysis, neuroimaging, and computer vision communities. It is the goal of this paper to survey contributions from all these fields, concentrating
on streamline clustering, edge detection and segmentation, topological methods, and extraction of anisotropy creases. We point out interrelations between these topics and make suggestions for future research.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Thomas Schultz
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.322
urn:nbn:de:0030-drops-33010
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.322
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3306
2011-10-26T00:00:00Z
ddc:004
open_access
Previewing Volume Decomposition Through Optimal Viewpoints
Takahashi, Shigeo
Fujishiro, Issei
Takeshima, Yuriko
Bi, Chongke
Interval volumes
viewpoint selection
feature-driven approach
volume peeling
nested structures
Understanding a volume dataset through a 2D display is a complex task because it usually contains multi-layered inner structures that inevitably cause undesirable overlaps when projected onto the display. This requires us to identify feature subvolumes embedded in the given volume and then visualize them on the display so that we can clarify their relative positions. This article therefore introduces a new feature-driven approach to previewing volumes that respects both the 3D nested structures of the feature subvolumes and their 2D arrangement in the projection by minimizing their occlusions. The associated process begins with tracking the topological transitions of isosurfaces with respect to the scalar field, in order to decompose the given volume dataset into feature components called interval volumes while extracting their nested structures. The volume dataset is then projected from the optimal viewpoint that archives the best balanced visibility of the decomposed components. The position of the optimal viewpoint is updated each time when we peel off an outer component with our interface by calculating the sum of the viewpoint optimality values for the remaining components. Several previewing examples are demonstrated to illustrate that the present approach can offer an effective means of traversing volumetric inner structures both in an interactive and automatic fashion with the interface.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Shigeo Takahashi and Issei Fujishiro and Yuriko Takeshima and Chongke Bi
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.346
urn:nbn:de:0030-drops-33062
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.346
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3302
2011-10-26T00:00:00Z
ddc:004
open_access
Modeling Multiresolution 3D Scalar Fields through Regular Simplex Bisection
Weiss, Kenneth
De Floriani, Leila
Tetrahedral bisection
hierarchy of diamonds
mesh-based multiresolution models
regular simplex bisection
scientific visualization
We review modeling techniques for multiresolution three-dimensional scalar fields based on a discretization of the field domain into nested tetrahedral meshes generated through regular simplex bisection. Such meshes are described through hierarchical data structures and their representation is characterized by the modeling primitive used. The primary conceptual distinction among the different approaches proposed in the literature is whether they treat tetrahedra or clusters of tetrahedra, called diamonds, as the modeling primitive. We first focus on representations for the modeling primitive and for nested meshes. Next, we survey the applications of these meshes to modeling multiresolution 3D scalar fields, with an emphasis on interactive visualization. We also consider the relationship of such meshes to octrees. Finally, we discuss directions for further research.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Kenneth Weiss and Leila De Floriani
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.360
urn:nbn:de:0030-drops-33021
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.360
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3307
2011-10-26T00:00:00Z
ddc:004
open_access
ViSSaAn: Visual Support for Safety Analysis
Yang, Yi
Zeckzer, Dirk
Liggesmeyer, Peter
Hagen, Hans
Safety Analysis
Fault Tree Analysis
Minimal Cut Sets
Safety Visualization
Information Visualization
Safety of technical systems are becoming more and more important nowadays. Fault trees and minimal cut sets are usually used to attack the problems of assessing safety-critical systems. A visualization system named ViSSaAn, consisting of a matrix view, is proposed that supports an efficient safety analysis based on the information from these techniques. Interactions such as zooming and grouping are provided to support the task of finding the safety problems from the analysis information. An example based on real data shows the usefulness of ViSSaAn.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Yi Yang and Dirk Zeckzer and Peter Liggesmeyer and Hans Hagen
2011
Is Part Of Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol2.SciViz.2011.378
urn:nbn:de:0030-drops-33073
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.378
eng
https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode
oai:drops-oai.dagstuhl.de:3602
2012-08-23T00:00:00Z
ddc:004
open_access
DFU, Volume 3, Multimodal Music Processing, Complete Volume
Müller, Meinard
Goto, Masataka
Schedl, Markus
Sound and Music Computing, Arts and Humanities–Music, Multimedia Information Systems
DFU, Volume 3, Multimodal Music Processing, Complete Volume
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Meinard Müller and Masataka Goto and Markus Schedl
2012
Is Part Of Dagstuhl Follow-Ups, Volume 3, Multimodal Music Processing (2012)
Collection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol3.11041
urn:nbn:de:0030-drops-36023
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol3.11041
eng
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oai:drops-oai.dagstuhl.de:3462
2012-04-27T00:00:00Z
ddc:004
open_access
Frontmatter, Table of Contents, Preface, List of Authors
Müller, Meinard
Goto, Masataka
Schedl, Markus
Frontmatter
Table of Contents
Preface
List of Authors
Frontmatter, Table of Contents, Preface, List of Authors
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Meinard Müller and Masataka Goto and Markus Schedl
2012
Is Part Of Dagstuhl Follow-Ups, Volume 3, Multimodal Music Processing (2012)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol3.11041.i
urn:nbn:de:0030-drops-34621
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol3.11041.i
eng
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oai:drops-oai.dagstuhl.de:3463
2012-04-27T00:00:00Z
ddc:004
open_access
Linking Sheet Music and Audio - Challenges and New Approaches
Thomas, Verena
Fremerey, Christian
Müller, Meinard
Clausen, Michael
Music signals
audio
sheet music
music synchronization
alignment
optical music recognition
user interfaces
multimodality
Score and audio files are the two most important ways to represent,
convey, record, store, and experience music. While score describes a piece of music on an abstract level using symbols such as notes, keys, and measures, audio files allow for reproducing a specific acoustic realization of the piece. Each of these representations reflects different facets of music yielding insights into aspects ranging from structural elements (e.g., motives, themes, musical form) to specific performance aspects (e.g., artistic shaping,
sound). Therefore, the simultaneous access to score and audio
representations is of great importance.
In this paper, we address the problem of automatically generating
musically relevant linking structures between the various data sources
that are available for a given piece of music. In particular, we discuss the task of sheet music-audio synchronization with the aim to link regions in images of scanned scores to musically corresponding sections in an audio recording of the same piece. Such linking structures form the basis for novel interfaces that allow users to access and explore multimodal sources of music within a single framework.
As our main contributions, we give an overview of the state-of-the-art for this kind of synchronization task, we present some novel approaches, and indicate future research directions. In particular, we address problems that arise in the presence of structural differences and discuss challenges when applying optical music recognition to complex orchestral scores. Finally, potential applications of the synchronization results are presented.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Verena Thomas and Christian Fremerey and Meinard Müller and Michael Clausen
2012
Is Part Of Dagstuhl Follow-Ups, Volume 3, Multimodal Music Processing (2012)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol3.11041.1
urn:nbn:de:0030-drops-34637
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol3.11041.1
eng
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oai:drops-oai.dagstuhl.de:3464
2012-04-27T00:00:00Z
ddc:004
open_access
Lyrics-to-Audio Alignment and its Application
Fujihara, Hiromasa
Goto, Masataka
Lyrics
Alignment
Karaoke
Multifunctional music player
Lyrics-based music retrieval
Automatic lyrics-to-audio alignment techniques have been drawing attention in the last years and various studies have been made in this field. The objective of lyrics-to-audio alignment is to estimate a temporal relationship between lyrics and musical audio signals and can be applied to various applications such as Karaoke-style lyrics display. In this contribution, we provide an overview of recent development in this research topic, where we put a particular focus on categorization of various methods and on applications.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Hiromasa Fujihara and Masataka Goto
2012
Is Part Of Dagstuhl Follow-Ups, Volume 3, Multimodal Music Processing (2012)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol3.11041.23
urn:nbn:de:0030-drops-34644
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol3.11041.23
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:3465
2012-04-27T00:00:00Z
ddc:004
open_access
Fusion of Multimodal Information in Music Content Analysis
Essid, Slim
Richard, Gaël
Multimodal music processing
music signals indexing and transcription
information fusion
audio
video
Music is often processed through its acoustic realization. This is restrictive in the sense that music is clearly a highly multimodal concept where various types of heterogeneous information can be associated to a given piece of music (a musical score, musicians' gestures, lyrics, user-generated metadata, etc.). This has recently led researchers to apprehend music through its various facets, giving rise to "multimodal music analysis" studies. This article gives a synthetic overview of methods that have been successfully employed in multimodal signal analysis. In particular, their use in music content processing is discussed in more details through five case studies that highlight different multimodal integration techniques. The case studies include an example of cross-modal correlation for music video analysis, an audiovisual drum transcription system, a description of the concept of informed source separation, a discussion of multimodal dance-scene analysis, and an example of user-interactive music analysis. In the light of these case studies, some perspectives of multimodality in music processing are finally suggested.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Slim Essid and Gaël Richard
2012
Is Part Of Dagstuhl Follow-Ups, Volume 3, Multimodal Music Processing (2012)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol3.11041.37
urn:nbn:de:0030-drops-34652
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol3.11041.37
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:3466
2012-04-27T00:00:00Z
ddc:004
open_access
A Cross-Version Approach for Harmonic Analysis of Music Recordings
Konz, Verena
Müller, Meinard
Harmonic analysis
chord labeling
audio
music
music synchronization
audio alignment
The automated extraction of chord labels from audio recordings is a central task in music information retrieval. Here, the chord labeling is typically performed on a specific audio version of a piece of music, produced under certain recording conditions, played on specific instruments and characterized by individual styles of the musicians. As a consequence, the obtained chord labeling results are strongly influenced by version-dependent characteristics. In this chapter, we show that analyzing the harmonic properties of several audio versions synchronously stabilizes the chord labeling result in the sense that inconsistencies indicate version-dependent characteristics, whereas consistencies across several versions indicate harmonically stable passages in the piece of music. In particular, we show that consistently labeled passages often correspond to correctly labeled passages. Our experiments show that the cross-version labeling procedure significantly increases the precision of the result while keeping the recall at a relatively high level. Furthermore, we introduce a powerful visualization which reveals the harmonically stable passages on a musical time axis specified in bars. Finally, we demonstrate how this visualization facilitates a better understanding of classification errors and may be used by music experts as a helpful tool for exploring harmonic structures.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Verena Konz and Meinard Müller
2012
Is Part Of Dagstuhl Follow-Ups, Volume 3, Multimodal Music Processing (2012)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol3.11041.53
urn:nbn:de:0030-drops-34665
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol3.11041.53
eng
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oai:drops-oai.dagstuhl.de:3467
2012-04-27T00:00:00Z
ddc:004
open_access
Score-Informed Source Separation for Music Signals
Ewert, Sebastian
Müller, Meinard
Audio processing
music signals
source separation
musical score
alignment
music synchronization
non-negative matrix factorization
parametric mod
In recent years, the processing of audio recordings by exploiting additional musical knowledge has turned out to be a promising research direction. In particular, additional note information as specified by a musical score or a MIDI file has been employed to support various audio processing tasks such as source separation, audio parameterization, performance analysis, or instrument equalization. In this contribution, we provide an overview of approaches for score-informed source separation and illustrate their potential by discussing innovative applications and interfaces. Additionally, to illustrate some basic principles behind these approaches, we demonstrate how score information can be integrated into the well-known non-negative matrix factorization (NMF) framework. Finally, we compare this approach to advanced methods based on parametric models.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Sebastian Ewert and Meinard Müller
2012
Is Part Of Dagstuhl Follow-Ups, Volume 3, Multimodal Music Processing (2012)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol3.11041.73
urn:nbn:de:0030-drops-34670
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol3.11041.73
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:3468
2012-04-27T00:00:00Z
ddc:004
open_access
Music Information Retrieval Meets Music Education
Dittmar, Christian
Cano, Estefanía
Abeßer, Jakob
Grollmisch, Sascha
Music learning
music transcription
source separation
performance feedback
This paper addresses the use of Music Information Retrieval (MIR) techniques in music education and their integration in learning software. A general overview of systems that are either commercially available or in research stage is presented. Furthermore, three well-known MIR methods used in music learning systems and their state-of-the-art are described: music transcription, solo and accompaniment track creation, and generation of performance instructions. As a representative example of a music learning system developed within the MIR community, the Songs2See software is outlined. Finally, challenges and directions for future research are described.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Christian Dittmar and Estefanía Cano and Jakob Abeßer and Sascha Grollmisch
2012
Is Part Of Dagstuhl Follow-Ups, Volume 3, Multimodal Music Processing (2012)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol3.11041.95
urn:nbn:de:0030-drops-34689
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol3.11041.95
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:3469
2012-04-27T00:00:00Z
ddc:004
open_access
Human Computer Music Performance
Dannenberg, Roger B.
Interactive performance
music processing
music signals
music analysis
music synthesis
audio
score
Human Computer Music Performance (HCMP) is the study of music performance by live human performers and real-time computer-based performers. One goal of HCMP is to create a highly autonomous artificial performer that can fill the role of a human, especially in a popular music setting. This will require advances in automated music listening and understanding, new representations for music, techniques for music synchronization, real-time human-computer communication, music generation, sound synthesis, and sound diffusion. Thus, HCMP is an ideal framework to motivate and integrate advanced music research. In addition, HCMP has the potential to benefit millions of practicing musicians, both amateurs and professionals alike. The vision of HCMP, the problems that must be solved, and some recent progress are presented.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Roger B. Dannenberg
2012
Is Part Of Dagstuhl Follow-Ups, Volume 3, Multimodal Music Processing (2012)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol3.11041.121
urn:nbn:de:0030-drops-34693
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol3.11041.121
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:3470
2012-04-27T00:00:00Z
ddc:004
open_access
User-Aware Music Retrieval
Schedl, Markus
Stober, Sebastian
Gómez, Emilia
Orio, Nicola
Liem, Cynthia C.S.
user-aware music retrieval
personalization
recommendation
user context
adaptive systems
similarity measurement
serendipity
Personalized and user-aware systems for retrieving multimedia items are becoming increasingly important as the amount of available multimedia data has been spiraling. A personalized system is one that incorporates information about the user into its data processing part (e.g., a particular user taste for a movie genre). A context-aware system, in contrast, takes into account dynamic aspects of the user context when processing the data (e.g., location and time where/when a user issues a query). Today's user-adaptive systems often incorporate both aspects.
Particularly focusing on the music domain, this article gives an overview of different aspects we deem important to build personalized music retrieval systems. In this vein, we first give an overview of factors that influence the human perception of music. We then propose and discuss various requirements for a personalized, user-aware music retrieval system. Eventually, the state-of-the-art in building such systems is reviewed, taking in particular aspects of "similarity" and "serendipity" into account.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Markus Schedl and Sebastian Stober and Emilia Gómez and Nicola Orio and Cynthia C.S. Liem
2012
Is Part Of Dagstuhl Follow-Ups, Volume 3, Multimodal Music Processing (2012)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol3.11041.135
urn:nbn:de:0030-drops-34709
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol3.11041.135
eng
https://creativecommons.org/licenses/by/3.0/legalcode
oai:drops-oai.dagstuhl.de:3471
2012-04-27T00:00:00Z
ddc:004
open_access
Audio Content-Based Music Retrieval
Grosche, Peter
Müller, Meinard
Serrà, Joan
music retrieval
content-based
query-by-example
audio identification
audio matching
cover song identification
The rapidly growing corpus of digital audio material requires novel
retrieval strategies for exploring large music collections. Traditional retrieval strategies rely on metadata that describe the actual audio content in words. In the case that such textual descriptions are not available, one requires content-based retrieval strategies which only utilize the raw audio material. In this contribution, we discuss content-based retrieval strategies that
follow the query-by-example paradigm: given an audio query, the task is to retrieve all documents that are somehow similar or related to the query from a music collection. Such strategies can be loosely classified according to their "specificity", which refers to the degree of similarity between the query and the database documents. Here, high specificity refers to a strict notion of similarity, whereas low specificity to a rather vague one. Furthermore, we introduce a second classification principle based on "granularity", where one distinguishes between fragment-level and document-level retrieval. Using a classification scheme based on specificity and granularity, we identify various classes of retrieval scenarios, which comprise "audio identification", "audio matching", and "version
identification". For these three important classes, we give an overview of representative state-of-the-art approaches, which also illustrate the sometimes subtle but crucial differences between the retrieval scenarios. Finally, we give an outlook on a user-oriented retrieval system, which combines the various retrieval strategies in a unified framework.
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Peter Grosche and Meinard Müller and Joan Serrà
2012
Is Part Of Dagstuhl Follow-Ups, Volume 3, Multimodal Music Processing (2012)
InCollection
Text
doc-type:ResearchArticle
publishedVersion
application/pdf
doi:10.4230/DFU.Vol3.11041.157
urn:nbn:de:0030-drops-34711
https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol3.11041.157
eng
https://creativecommons.org/licenses/by/3.0/legalcode
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