19 Search Results for "Sack, J�rg-R�diger"


Document
Survey
Knowledge Graph Embeddings: Open Challenges and Opportunities

Authors: Russa Biswas, Lucie-Aimée Kaffee, Michael Cochez, Stefania Dumbrava, Theis E. Jendal, Matteo Lissandrini, Vanessa Lopez, Eneldo Loza Mencía, Heiko Paulheim, Harald Sack, Edlira Kalemi Vakaj, and Gerard de Melo

Published in: TGDK, Volume 1, Issue 1 (2023): Special Issue on Trends in Graph Data and Knowledge. Transactions on Graph Data and Knowledge, Volume 1, Issue 1


Abstract
While Knowledge Graphs (KGs) have long been used as valuable sources of structured knowledge, in recent years, KG embeddings have become a popular way of deriving numeric vector representations from them, for instance, to support knowledge graph completion and similarity search. This study surveys advances as well as open challenges and opportunities in this area. For instance, the most prominent embedding models focus primarily on structural information. However, there has been notable progress in incorporating further aspects, such as semantics, multi-modal, temporal, and multilingual features. Most embedding techniques are assessed using human-curated benchmark datasets for the task of link prediction, neglecting other important real-world KG applications. Many approaches assume a static knowledge graph and are unable to account for dynamic changes. Additionally, KG embeddings may encode data biases and lack interpretability. Overall, this study provides an overview of promising research avenues to learn improved KG embeddings that can address a more diverse range of use cases.

Cite as

Russa Biswas, Lucie-Aimée Kaffee, Michael Cochez, Stefania Dumbrava, Theis E. Jendal, Matteo Lissandrini, Vanessa Lopez, Eneldo Loza Mencía, Heiko Paulheim, Harald Sack, Edlira Kalemi Vakaj, and Gerard de Melo. Knowledge Graph Embeddings: Open Challenges and Opportunities. In Special Issue on Trends in Graph Data and Knowledge. Transactions on Graph Data and Knowledge (TGDK), Volume 1, Issue 1, pp. 4:1-4:32, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2023)


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@Article{biswas_et_al:TGDK.1.1.4,
  author =	{Biswas, Russa and Kaffee, Lucie-Aim\'{e}e and Cochez, Michael and Dumbrava, Stefania and Jendal, Theis E. and Lissandrini, Matteo and Lopez, Vanessa and Menc{\'\i}a, Eneldo Loza and Paulheim, Heiko and Sack, Harald and Vakaj, Edlira Kalemi and de Melo, Gerard},
  title =	{{Knowledge Graph Embeddings: Open Challenges and Opportunities}},
  journal =	{Transactions on Graph Data and Knowledge},
  pages =	{4:1--4:32},
  year =	{2023},
  volume =	{1},
  number =	{1},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/TGDK.1.1.4},
  URN =		{urn:nbn:de:0030-drops-194783},
  doi =		{10.4230/TGDK.1.1.4},
  annote =	{Keywords: Knowledge Graphs, KG embeddings, Link prediction, KG applications}
}
Document
Short Paper
A Proposal for a Two-Way Journey on Validating Locations in Unstructured and Structured Data

Authors: Ilkcan Keles, Omar Qawasmeh, Tabea Tietz, Ludovica Marinucci, Roberto Reda, and Marieke van Erp

Published in: OASIcs, Volume 70, 2nd Conference on Language, Data and Knowledge (LDK 2019)


Abstract
The Web of Data has grown explosively over the past few years, and as with any dataset, there are bound to be invalid statements in the data, as well as gaps. Natural Language Processing (NLP) is gaining interest to fill gaps in data by transforming (unstructured) text into structured data. However, there is currently a fundamental mismatch in approaches between Linked Data and NLP as the latter is often based on statistical methods, and the former on explicitly modelling knowledge. However, these fields can strengthen each other by joining forces. In this position paper, we argue that using linked data to validate the output of an NLP system, and using textual data to validate Linked Open Data (LOD) cloud statements is a promising research avenue. We illustrate our proposal with a proof of concept on a corpus of historical travel stories.

Cite as

Ilkcan Keles, Omar Qawasmeh, Tabea Tietz, Ludovica Marinucci, Roberto Reda, and Marieke van Erp. A Proposal for a Two-Way Journey on Validating Locations in Unstructured and Structured Data. In 2nd Conference on Language, Data and Knowledge (LDK 2019). Open Access Series in Informatics (OASIcs), Volume 70, pp. 13:1-13:8, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2019)


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@InProceedings{keles_et_al:OASIcs.LDK.2019.13,
  author =	{Keles, Ilkcan and Qawasmeh, Omar and Tietz, Tabea and Marinucci, Ludovica and Reda, Roberto and van Erp, Marieke},
  title =	{{A Proposal for a Two-Way Journey on Validating Locations in Unstructured and Structured Data}},
  booktitle =	{2nd Conference on Language, Data and Knowledge (LDK 2019)},
  pages =	{13:1--13:8},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-105-4},
  ISSN =	{2190-6807},
  year =	{2019},
  volume =	{70},
  editor =	{Eskevich, Maria and de Melo, Gerard and F\"{a}th, Christian and McCrae, John P. and Buitelaar, Paul and Chiarcos, Christian and Klimek, Bettina and Dojchinovski, Milan},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/OASIcs.LDK.2019.13},
  URN =		{urn:nbn:de:0030-drops-103778},
  doi =		{10.4230/OASIcs.LDK.2019.13},
  annote =	{Keywords: data validity, natural language processing, linked data}
}
Document
Approximating the Integral Fréchet Distance

Authors: Anil Maheshwari, Jörg-Rüdiger Sack, and Christian Scheffer

Published in: LIPIcs, Volume 53, 15th Scandinavian Symposium and Workshops on Algorithm Theory (SWAT 2016)


Abstract
We present a pseudo-polynomial time (1 + epsilon)-approximation algorithm for computing the integral and average Fréchet distance between two given polygonal curves T_1 and T_2. The running time is in O(zeta^{4}n^4/epsilon^2) where n is the complexity of T_1 and T_2 and zeta is the maximal ratio of the lengths of any pair of segments from T_1 and T_2. Furthermore, we give relations between weighted shortest paths inside a single parameter cell C and the monotone free space axis of C. As a result we present a simple construction of weighted shortest paths inside a parameter cell. Additionally, such a shortest path provides an optimal solution for the partial Fréchet similarity of segments for all leash lengths. These two aspects are related to each other and are of independent interest.

Cite as

Anil Maheshwari, Jörg-Rüdiger Sack, and Christian Scheffer. Approximating the Integral Fréchet Distance. In 15th Scandinavian Symposium and Workshops on Algorithm Theory (SWAT 2016). Leibniz International Proceedings in Informatics (LIPIcs), Volume 53, pp. 26:1-26:14, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2016)


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@InProceedings{maheshwari_et_al:LIPIcs.SWAT.2016.26,
  author =	{Maheshwari, Anil and Sack, J\"{o}rg-R\"{u}diger and Scheffer, Christian},
  title =	{{Approximating the Integral Fr\'{e}chet Distance}},
  booktitle =	{15th Scandinavian Symposium and Workshops on Algorithm Theory (SWAT 2016)},
  pages =	{26:1--26:14},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-011-8},
  ISSN =	{1868-8969},
  year =	{2016},
  volume =	{53},
  editor =	{Pagh, Rasmus},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.SWAT.2016.26},
  URN =		{urn:nbn:de:0030-drops-60485},
  doi =		{10.4230/LIPIcs.SWAT.2016.26},
  annote =	{Keywords: Fr\'{e}chet distance, partial Fr\'{e}chet similarity, curve matching}
}
Document
Geosensor Networks: Bridging Algorithms and Applications (Dagstuhl Seminar 13492)

Authors: Matt Duckham, Stefan Dulman, Jörg-Rüdiger Sack, and Monika Sester

Published in: Dagstuhl Reports, Volume 3, Issue 12 (2014)


Abstract
This report documents the program and the outcomes of Dagstuhl Seminar 13492 "Geosensor Networks: Bridging Algorithms and Applications." New geosensor networks technologies have the potential to revolutionize the way we monitor and interact with the world around us. The objective of the seminar was to move closer to realizing this potential, by better connecting theoretical advances with practical applications and education. The Seminar ran from 1--6 December 2013, and brought together 21 participants from around the world, representing wide variety of disciplinary backgrounds and expertise connected with geosensor networks. While these discussions are continuing to develop and bear fruit, this report summarizes the results of the discussions held at the seminar.

Cite as

Matt Duckham, Stefan Dulman, Jörg-Rüdiger Sack, and Monika Sester. Geosensor Networks: Bridging Algorithms and Applications (Dagstuhl Seminar 13492). In Dagstuhl Reports, Volume 3, Issue 12, pp. 17-42, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2014)


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@Article{duckham_et_al:DagRep.3.12.17,
  author =	{Duckham, Matt and Dulman, Stefan and Sack, J\"{o}rg-R\"{u}diger and Sester, Monika},
  title =	{{Geosensor Networks: Bridging Algorithms and Applications (Dagstuhl Seminar 13492)}},
  pages =	{17--42},
  journal =	{Dagstuhl Reports},
  ISSN =	{2192-5283},
  year =	{2014},
  volume =	{3},
  number =	{12},
  editor =	{Duckham, Matt and Dulman, Stefan and Sack, J\"{o}rg-R\"{u}diger and Sester, Monika},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagRep.3.12.17},
  URN =		{urn:nbn:de:0030-drops-45060},
  doi =		{10.4230/DagRep.3.12.17},
  annote =	{Keywords: amorphous computing, decentralized spatial computing, distributed algorithms, location privacy, organic computing, self-organization, sensor/actuator networks, situation awareness, smart materials, spatial analysis}
}
Document
Character Networks for Narrative Generation: Structural Balance Theory and the Emergence of Proto-Narratives

Authors: Graham Alexander Sack

Published in: OASIcs, Volume 32, 2013 Workshop on Computational Models of Narrative


Abstract
This paper models narrative as a complex adaptive system in which the temporal sequence of events constituting a story emerges out of cascading local interactions between nodes in a social network. The approach is not intended as a general theory of narrative, but rather as a particular generative mechanism relevant to several academic communities: (1) literary critics and narrative theorists interested in new models for narrative analysis, (2) artificial intelligence researchers and video game designers interested in new mechanisms for narrative generation, and (3) complex systems theorists interested in novel applications of agent-based modeling and network theory. The paper is divided into two parts. The first part offers examples of research by literary critics on the relationship between social networks of fictional characters and the structure of long-form narratives, particularly novels. The second part provides an example of schematic story generation based on a simulation of the structural balance network model. I will argue that if literary critics can better understand sophisticated narratives by extracting networks from them, then narrative intelligence researchers can benefit by inverting the process, that is, by generating narratives from networks.

Cite as

Graham Alexander Sack. Character Networks for Narrative Generation: Structural Balance Theory and the Emergence of Proto-Narratives. In 2013 Workshop on Computational Models of Narrative. Open Access Series in Informatics (OASIcs), Volume 32, pp. 183-197, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2013)


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@InProceedings{sack:OASIcs.CMN.2013.183,
  author =	{Sack, Graham Alexander},
  title =	{{Character Networks for Narrative Generation: Structural Balance Theory and the Emergence of Proto-Narratives}},
  booktitle =	{2013 Workshop on Computational Models of Narrative},
  pages =	{183--197},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-939897-57-6},
  ISSN =	{2190-6807},
  year =	{2013},
  volume =	{32},
  editor =	{Finlayson, Mark A. and Fisseni, Bernhard and L\"{o}we, Benedikt and Meister, Jan Christoph},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/OASIcs.CMN.2013.183},
  URN =		{urn:nbn:de:0030-drops-41617},
  doi =		{10.4230/OASIcs.CMN.2013.183},
  annote =	{Keywords: Narrative Generation, Social Network Analysis, Structural Balance Theory, Agent Based Modeling}
}
Document
10491 Abstracts Collection – Representation, Analysis and Visualization of Moving Objects

Authors: Jörg-Rüdiger Sack, Bettina Speckmann, Emiel Van Loon, and Robert Weibel

Published in: Dagstuhl Seminar Proceedings, Volume 10491, Representation, Analysis and Visualization of Moving Objects (2011)


Abstract
From December 5 to December 10, 2010, the Dagstuhl Seminar 10491 ``Representation, Analysis and Visualization of Moving Objects'' was held in Schloss Dagstuhl~--~Leibniz Center for Informatics. The major goal of this seminar has been to bring together the diverse and fast growing, research community that is involved in developing better computational techniques for spatio-temporal object representation, data mining, and visualization massive amounts of moving object data. The participants included experts from fields such as computational geometry, data mining, visual analytics, GIS science, transportation science, urban planning and movement ecology. Most of the participants came from academic institutions, some from government agencies and industry. The seminar has led to a fruitful exchange of ideas between different disciplines, to the creation of new interdisciplinary collaborations, concrete plans for a data challenge in an upcoming conference, and to recommendations for future research directions. Abstracts of the presentations given during the seminar as well as abstracts of seminar results and ideas are put together in this paper.

Cite as

Jörg-Rüdiger Sack, Bettina Speckmann, Emiel Van Loon, and Robert Weibel. 10491 Abstracts Collection – Representation, Analysis and Visualization of Moving Objects. In Representation, Analysis and Visualization of Moving Objects. Dagstuhl Seminar Proceedings, Volume 10491, pp. 1-14, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2011)


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@InProceedings{sack_et_al:DagSemProc.10491.1,
  author =	{Sack, J\"{o}rg-R\"{u}diger and Speckmann, Bettina and Van Loon, Emiel and Weibel, Robert},
  title =	{{10491 Abstracts Collection – Representation, Analysis and Visualization of Moving Objects}},
  booktitle =	{Representation, Analysis and Visualization of Moving Objects},
  pages =	{1--14},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2011},
  volume =	{10491},
  editor =	{J\"{o}rg-R\"{u}diger Sack and Bettina Speckmann and Emiel Van Loon and Robert Weibel},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemProc.10491.1},
  URN =		{urn:nbn:de:0030-drops-30870},
  doi =		{10.4230/DagSemProc.10491.1},
  annote =	{Keywords: Moving objects, Spatio-temporal databases, Spatio-temporal analysis, Movement analysis, Spatial data mining, KDD, Computational geometry, Visual analytics}
}
Document
10491 Summary – Representation, Analysis and Visualization of Moving Objects

Authors: Jörg-Rüdiger Sack, Bettina Speckmann, Emiel van Loon, and Robert Weibel

Published in: Dagstuhl Seminar Proceedings, Volume 10491, Representation, Analysis and Visualization of Moving Objects (2011)


Abstract
This seminar is a successor to the Representation, Analysis and Visualization of Moving Objects seminar in 2008 (seminar 08451). The major goal has been to bring together the diverse and fast growing, research community that is involved in developing better computational techniques for spatio-temporal object representation, data mining, and visualization of massive amounts of moving object data. The participants included experts from fields such as computational geometry, data mining, visual analytics, GIS science, transportation science, urban planning and movement ecology. Most of the participants came from academic institutions, some from government agencies and industry. The seminar has led to a fruitful exchange of ideas between different disciplines, to the creation of new interdisciplinary collaborations, concrete plans for a data challenge in an upcoming conference, and to recommendations for future research directions.

Cite as

Jörg-Rüdiger Sack, Bettina Speckmann, Emiel van Loon, and Robert Weibel. 10491 Summary – Representation, Analysis and Visualization of Moving Objects. In Representation, Analysis and Visualization of Moving Objects. Dagstuhl Seminar Proceedings, Volume 10491, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2011)


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@InProceedings{sack_et_al:DagSemProc.10491.2,
  author =	{Sack, J\"{o}rg-R\"{u}diger and Speckmann, Bettina and van Loon, Emiel and Weibel, Robert},
  title =	{{10491 Summary – Representation, Analysis and Visualization of Moving Objects}},
  booktitle =	{Representation, Analysis and Visualization of Moving Objects},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2011},
  volume =	{10491},
  editor =	{J\"{o}rg-R\"{u}diger Sack and Bettina Speckmann and Emiel Van Loon and Robert Weibel},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemProc.10491.2},
  URN =		{urn:nbn:de:0030-drops-30864},
  doi =		{10.4230/DagSemProc.10491.2},
  annote =	{Keywords: Moving objects, spatio-temporal databases, spatio-temporal analysis, movement analysis, spatial data mining, KDD, computational geometry, visual analy}
}
Document
10491 Results of the break-out group: Aggregation

Authors: Mark de Berg, Jörg-Rüdiger Sack, Bettina Speckmann, Anne Driemel, Maike Buchin, Monika Sester, and Marc van Kreveld

Published in: Dagstuhl Seminar Proceedings, Volume 10491, Representation, Analysis and Visualization of Moving Objects (2011)


Abstract
We discussed different problems that arise when aggregating trajectories: how to segment the input, whether to use original parts of the input trajectories, as opposed to an ``averaged'' path and how to simplify the aggregated structure. We give examples where these questions are not easily answered.

Cite as

Mark de Berg, Jörg-Rüdiger Sack, Bettina Speckmann, Anne Driemel, Maike Buchin, Monika Sester, and Marc van Kreveld. 10491 Results of the break-out group: Aggregation. In Representation, Analysis and Visualization of Moving Objects. Dagstuhl Seminar Proceedings, Volume 10491, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2011)


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@InProceedings{deberg_et_al:DagSemProc.10491.3,
  author =	{de Berg, Mark and Sack, J\"{o}rg-R\"{u}diger and Speckmann, Bettina and Driemel, Anne and Buchin, Maike and Sester, Monika and van Kreveld, Marc},
  title =	{{10491 Results of the break-out group: Aggregation}},
  booktitle =	{Representation, Analysis and Visualization of Moving Objects},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2011},
  volume =	{10491},
  editor =	{J\"{o}rg-R\"{u}diger Sack and Bettina Speckmann and Emiel Van Loon and Robert Weibel},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemProc.10491.3},
  URN =		{urn:nbn:de:0030-drops-29878},
  doi =		{10.4230/DagSemProc.10491.3},
  annote =	{Keywords: Aggregation, Trajectories, Generalization, Map Generation}
}
Document
10491 Results of the break-out group: Benchmarking

Authors: Emiel van Loon, Ross Purves, and Robert Weibel

Published in: Dagstuhl Seminar Proceedings, Volume 10491, Representation, Analysis and Visualization of Moving Objects (2011)


Abstract
This working group has discussed the possibilities to start developing benchmarking tools for algorithms to analyse movement data. Many basic properties of movement data and derived products from these data are not clearly defined. In addition, analysis algorithms vary with respect to input as well as output data. As a result, it is difficult to evaluate the suitability of different algorithms for application to a given type of data and question. We think there is a need to define clear tests or experiments for this purpose.

Cite as

Emiel van Loon, Ross Purves, and Robert Weibel. 10491 Results of the break-out group: Benchmarking. In Representation, Analysis and Visualization of Moving Objects. Dagstuhl Seminar Proceedings, Volume 10491, pp. 1-3, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2011)


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@InProceedings{vanloon_et_al:DagSemProc.10491.4,
  author =	{van Loon, Emiel and Purves, Ross and Weibel, Robert},
  title =	{{10491 Results of the break-out group: Benchmarking}},
  booktitle =	{Representation, Analysis and Visualization of Moving Objects},
  pages =	{1--3},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2011},
  volume =	{10491},
  editor =	{J\"{o}rg-R\"{u}diger Sack and Bettina Speckmann and Emiel Van Loon and Robert Weibel},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemProc.10491.4},
  URN =		{urn:nbn:de:0030-drops-29886},
  doi =		{10.4230/DagSemProc.10491.4},
  annote =	{Keywords: Benchmarking, Movement Analysis}
}
Document
10491 Results of the break-out group: Gulls Data

Authors: Emiel van Loon, Jörg-Rüdiger Sack, Kevin Buchin, Maike Buchin, Mark de Berg, Marc van Kreveld, Joachim Gudmundsson, and David Mountain

Published in: Dagstuhl Seminar Proceedings, Volume 10491, Representation, Analysis and Visualization of Moving Objects (2011)


Abstract
A classification of gull behaviour was produced by the group, led by domain expert Emiel van Loon, who provided additional context including that gull trips are typically composed of distinct segments, that gull trips are rarely single purpose, and that there is very little diurnal pattern to activities. The classification produced is not intended to be complete, or non overlapping. Furthermore, the group considered how the attributes in the gulls dataset could be used in algorithms to automatically classify the dataset into distinct spatial patterns, and associate this with gull behaviours.

Cite as

Emiel van Loon, Jörg-Rüdiger Sack, Kevin Buchin, Maike Buchin, Mark de Berg, Marc van Kreveld, Joachim Gudmundsson, and David Mountain. 10491 Results of the break-out group: Gulls Data. In Representation, Analysis and Visualization of Moving Objects. Dagstuhl Seminar Proceedings, Volume 10491, pp. 1-4, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2011)


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@InProceedings{vanloon_et_al:DagSemProc.10491.5,
  author =	{van Loon, Emiel and Sack, J\"{o}rg-R\"{u}diger and Buchin, Kevin and Buchin, Maike and de Berg, Mark and van Kreveld, Marc and Gudmundsson, Joachim and Mountain, David},
  title =	{{10491 Results of the break-out group: Gulls Data}},
  booktitle =	{Representation, Analysis and Visualization of Moving Objects},
  pages =	{1--4},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2011},
  volume =	{10491},
  editor =	{J\"{o}rg-R\"{u}diger Sack and Bettina Speckmann and Emiel Van Loon and Robert Weibel},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemProc.10491.5},
  URN =		{urn:nbn:de:0030-drops-29912},
  doi =		{10.4230/DagSemProc.10491.5},
  annote =	{Keywords: Movement classification, Trajectory segmentation}
}
Document
10491 Results of the break-out group: Movement Data of Vervet Monkeys

Authors: Erik P. Willems, Kevin Buchin, and Urska Demsar

Published in: Dagstuhl Seminar Proceedings, Volume 10491, Representation, Analysis and Visualization of Moving Objects (2011)


Abstract
Discussions in this group focused on a particular problem that arises in animal movement ecology: how to link data describing movement (i.e. sequential GPS- coordinates collected on wild and free-ranging animals) with geographical and environmental context (i.e. properties of the internal and external environment within which the animals move). Our case study comprised a spatio-temporal data set on the movement of a group of vervet monkeys (Cercopithecus aethiops) over a twelve months observation period. We focused on two topics: context-aware estimation of home range area and multivariate visualisation of context data.

Cite as

Erik P. Willems, Kevin Buchin, and Urska Demsar. 10491 Results of the break-out group: Movement Data of Vervet Monkeys. In Representation, Analysis and Visualization of Moving Objects. Dagstuhl Seminar Proceedings, Volume 10491, pp. 1-3, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2011)


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@InProceedings{willems_et_al:DagSemProc.10491.6,
  author =	{Willems, Erik P. and Buchin, Kevin and Demsar, Urska},
  title =	{{10491 Results of the break-out group: Movement Data of Vervet Monkeys}},
  booktitle =	{Representation, Analysis and Visualization of Moving Objects},
  pages =	{1--3},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2011},
  volume =	{10491},
  editor =	{J\"{o}rg-R\"{u}diger Sack and Bettina Speckmann and Emiel Van Loon and Robert Weibel},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemProc.10491.6},
  URN =		{urn:nbn:de:0030-drops-29908},
  doi =		{10.4230/DagSemProc.10491.6},
  annote =	{Keywords: Visualisation}
}
Document
10491 Results of the break-out group: Similarity measures

Authors: Joachim Gudmundsson, Harvey Miller, Rodrigo Silveira, Mathias Versichele, and Stefan van der Spek

Published in: Dagstuhl Seminar Proceedings, Volume 10491, Representation, Analysis and Visualization of Moving Objects (2011)


Abstract
In the group discussions we discussed distance measures focussing on real world applications specifically on domain areas where trajectories have been generated by animals (birds, primates...) and humans in urban areas.

Cite as

Joachim Gudmundsson, Harvey Miller, Rodrigo Silveira, Mathias Versichele, and Stefan van der Spek. 10491 Results of the break-out group: Similarity measures. In Representation, Analysis and Visualization of Moving Objects. Dagstuhl Seminar Proceedings, Volume 10491, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2011)


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@InProceedings{gudmundsson_et_al:DagSemProc.10491.7,
  author =	{Gudmundsson, Joachim and Miller, Harvey and Silveira, Rodrigo and Versichele, Mathias and van der Spek, Stefan},
  title =	{{10491 Results of the break-out group: Similarity measures}},
  booktitle =	{Representation, Analysis and Visualization of Moving Objects},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2011},
  volume =	{10491},
  editor =	{J\"{o}rg-R\"{u}diger Sack and Bettina Speckmann and Emiel Van Loon and Robert Weibel},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemProc.10491.7},
  URN =		{urn:nbn:de:0030-drops-29893},
  doi =		{10.4230/DagSemProc.10491.7},
  annote =	{Keywords: Similarity, Movement Analysis}
}
Document
10491 Results of the break-out group: Visualisation

Authors: Kevin Buchin, Urska Demsar, Aidan Slingsby, and Erik P. Willems

Published in: Dagstuhl Seminar Proceedings, Volume 10491, Representation, Analysis and Visualization of Moving Objects (2011)


Abstract
In this group we decided to collect literature that we were familiar with that best illustrated how movement data in the form of trajectories can be visualised. In this report we categorise methods based on what part of the data space is shown, i.e. geographical space, temporal space or attribute space, some combination thereof or an aggregation in one or more of the space components. Methods that use computational methods for pattern recognition in combination with visual methods form a separate category. However, these categories are only what we came up with during our short discussion and are therefore not fixed, nor are they mutually exclusive (i.e. there is certain overlap of methods) and should be extended/redefined as required in a more exhaustive literature review in the future.

Cite as

Kevin Buchin, Urska Demsar, Aidan Slingsby, and Erik P. Willems. 10491 Results of the break-out group: Visualisation. In Representation, Analysis and Visualization of Moving Objects. Dagstuhl Seminar Proceedings, Volume 10491, pp. 1-4, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2011)


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@InProceedings{buchin_et_al:DagSemProc.10491.8,
  author =	{Buchin, Kevin and Demsar, Urska and Slingsby, Aidan and Willems, Erik P.},
  title =	{{10491 Results of the break-out group: Visualisation}},
  booktitle =	{Representation, Analysis and Visualization of Moving Objects},
  pages =	{1--4},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2011},
  volume =	{10491},
  editor =	{J\"{o}rg-R\"{u}diger Sack and Bettina Speckmann and Emiel Van Loon and Robert Weibel},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemProc.10491.8},
  URN =		{urn:nbn:de:0030-drops-29864},
  doi =		{10.4230/DagSemProc.10491.8},
  annote =	{Keywords: Visualisation}
}
Document
08451 Abstracts Collection – Representation, Analysis and Visualization of Moving Objects

Authors: Wolfgang Bitterlich, Jörg-Rüdiger Sack, Monika Sester, and Robert Weibel

Published in: Dagstuhl Seminar Proceedings, Volume 8451, Representation, Analysis and Visualization of Moving Objects (2009)


Abstract
From 02.11. to 07.11.2008, the Dagstuhl Seminar 08451 ``Representation, Analysis and Visualization of Moving Objects '' was held in Schloss Dagstuhl~--~Leibniz Center for Informatics. During the seminar, several participants presented their current research, and ongoing work and open problems were discussed. Abstracts of the presentations given during the seminar as well as abstracts of seminar results and ideas are put together in this paper. The first section describes the seminar topics and goals in general. Links to extended abstracts or full papers are provided, if available.

Cite as

Wolfgang Bitterlich, Jörg-Rüdiger Sack, Monika Sester, and Robert Weibel. 08451 Abstracts Collection – Representation, Analysis and Visualization of Moving Objects. In Representation, Analysis and Visualization of Moving Objects. Dagstuhl Seminar Proceedings, Volume 8451, pp. 1-14, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2009)


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@InProceedings{bitterlich_et_al:DagSemProc.08451.1,
  author =	{Bitterlich, Wolfgang and Sack, J\"{o}rg-R\"{u}diger and Sester, Monika and Weibel, Robert},
  title =	{{08451 Abstracts Collection – Representation, Analysis and Visualization of Moving Objects }},
  booktitle =	{Representation, Analysis and Visualization of Moving Objects},
  pages =	{1--14},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2009},
  volume =	{8451},
  editor =	{Wolfgang Bitterlich and J\"{o}rg-R\"{u}diger Sack and Monika Sester and Robert Weibel},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemProc.08451.1},
  URN =		{urn:nbn:de:0030-drops-18776},
  doi =		{10.4230/DagSemProc.08451.1},
  annote =	{Keywords: Moving objects, trajectory data mining}
}
Document
08451 Summary Report – Representation, Analysis and Visualization of Moving Objects

Authors: Wolfgang Bitterlich, Jörg-Rüdiger Sack, Monika Sester, and Robert Weibel

Published in: Dagstuhl Seminar Proceedings, Volume 8451, Representation, Analysis and Visualization of Moving Objects (2009)


Abstract
This document contains a short report summarizing the background, the program, and the outcomes of Dagstuhl Seminar 08451 on "Representation, Analysis and Visualization of Moving Objects".

Cite as

Wolfgang Bitterlich, Jörg-Rüdiger Sack, Monika Sester, and Robert Weibel. 08451 Summary Report – Representation, Analysis and Visualization of Moving Objects. In Representation, Analysis and Visualization of Moving Objects. Dagstuhl Seminar Proceedings, Volume 8451, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2009)


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@InProceedings{bitterlich_et_al:DagSemProc.08451.2,
  author =	{Bitterlich, Wolfgang and Sack, J\"{o}rg-R\"{u}diger and Sester, Monika and Weibel, Robert},
  title =	{{08451 Summary Report – Representation, Analysis and Visualization of Moving Objects }},
  booktitle =	{Representation, Analysis and Visualization of Moving Objects},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2009},
  volume =	{8451},
  editor =	{Wolfgang Bitterlich and J\"{o}rg-R\"{u}diger Sack and Monika Sester and Robert Weibel},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemProc.08451.2},
  URN =		{urn:nbn:de:0030-drops-18754},
  doi =		{10.4230/DagSemProc.08451.2},
  annote =	{Keywords: Moving objects, trajectory data mining}
}
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