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Documents authored by Zeckzer, Dirk

Document
DOI: 10.4230/DFU.Vol2.SciViz.2011.1
CakES: Cake Metaphor for Analyzing Safety Issues of Embedded Systems

Authors: Yasmin I. Al-Zokari, Taimur Khan, Daniel Schneider, Dirk Zeckzer, and Hans Hagen

Published in: Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)

Abstract
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.
Cite as

Yasmin I. Al-Zokari, Taimur Khan, Daniel Schneider, Dirk Zeckzer, and Hans Hagen. CakES: Cake Metaphor for Analyzing Safety Issues of Embedded Systems. In Scientific Visualization: Interactions, Features, Metaphors. Dagstuhl Follow-Ups, Volume 2, pp. 1-16, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2011)

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@InCollection{alzokari_et_al:DFU.Vol2.SciViz.2011.1,
  author =	{Al-Zokari, Yasmin I. and Khan, Taimur and Schneider, Daniel and Zeckzer, Dirk and Hagen, Hans},
  title =	{{CakES: Cake Metaphor for Analyzing Safety Issues of Embedded Systems}},
  booktitle =	{Scientific Visualization: Interactions, Features, Metaphors},
  pages =	{1--16},
  series =	{Dagstuhl Follow-Ups},
  ISBN =	{978-3-939897-26-2},
  ISSN =	{1868-8977},
  year =	{2011},
  volume =	{2},
  editor =	{Hagen, Hans},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.1},
  URN =		{urn:nbn:de:0030-drops-32844},
  doi =		{10.4230/DFU.Vol2.SciViz.2011.1},
  annote =	{Keywords: Fault Tree Analysis, minimal cut sets, basic events, information visualization, scientific visualization, engineering, tiled-wall, multiple monitor sy}
}
Document
DOI: 10.4230/DFU.Vol2.SciViz.2011.144
Framework for Comprehensive Size and Resolution Utilization of Arbitrary Displays

Authors: Taimur Khan, Daniel Schneider, Yasmin Al-Zokari, Dirk Zeckzer, and Hans Hagen

Published in: Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)

Abstract
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.
Cite as

Taimur Khan, Daniel Schneider, Yasmin Al-Zokari, Dirk Zeckzer, and Hans Hagen. Framework for Comprehensive Size and Resolution Utilization of Arbitrary Displays. In Scientific Visualization: Interactions, Features, Metaphors. Dagstuhl Follow-Ups, Volume 2, pp. 144-159, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2011)

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@InCollection{khan_et_al:DFU.Vol2.SciViz.2011.144,
  author =	{Khan, Taimur and Schneider, Daniel and Al-Zokari, Yasmin and Zeckzer, Dirk and Hagen, Hans},
  title =	{{Framework for Comprehensive Size and Resolution Utilization of Arbitrary Displays}},
  booktitle =	{Scientific Visualization: Interactions, Features, Metaphors},
  pages =	{144--159},
  series =	{Dagstuhl Follow-Ups},
  ISBN =	{978-3-939897-26-2},
  ISSN =	{1868-8977},
  year =	{2011},
  volume =	{2},
  editor =	{Hagen, Hans},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.144},
  URN =		{urn:nbn:de:0030-drops-32916},
  doi =		{10.4230/DFU.Vol2.SciViz.2011.144},
  annote =	{Keywords: Large and High-res Displays, Coordinated and Multiple Views, Human Computer Interaction}
}
Document
DOI: 10.4230/DFU.Vol2.SciViz.2011.378
ViSSaAn: Visual Support for Safety Analysis

Authors: Yi Yang, Dirk Zeckzer, Peter Liggesmeyer, and Hans Hagen

Published in: Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)

Abstract
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.
Cite as

Yi Yang, Dirk Zeckzer, Peter Liggesmeyer, and Hans Hagen. ViSSaAn: Visual Support for Safety Analysis. In Scientific Visualization: Interactions, Features, Metaphors. Dagstuhl Follow-Ups, Volume 2, pp. 378-395, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2011)

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@InCollection{yang_et_al:DFU.Vol2.SciViz.2011.378,
  author =	{Yang, Yi and Zeckzer, Dirk and Liggesmeyer, Peter and Hagen, Hans},
  title =	{{ViSSaAn: Visual Support for Safety Analysis}},
  booktitle =	{Scientific Visualization: Interactions, Features, Metaphors},
  pages =	{378--395},
  series =	{Dagstuhl Follow-Ups},
  ISBN =	{978-3-939897-26-2},
  ISSN =	{1868-8977},
  year =	{2011},
  volume =	{2},
  editor =	{Hagen, Hans},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.378},
  URN =		{urn:nbn:de:0030-drops-33073},
  doi =		{10.4230/DFU.Vol2.SciViz.2011.378},
  annote =	{Keywords: Safety Analysis, Fault Tree Analysis, Minimal Cut Sets, Safety Visualization, Information Visualization}
}
Document
DOI: 10.4230/DFU.SciViz.2010.11
Computing an Optimal Layout for Cone Trees

Authors: Dirk Zeckzer, Fang Chen, and Hans Hagen

Published in: Dagstuhl Follow-Ups, Volume 1, Scientific Visualization: Advanced Concepts (2010)

Abstract
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.
Cite as

Dirk Zeckzer, Fang Chen, and Hans Hagen. Computing an Optimal Layout for Cone Trees. In Scientific Visualization: Advanced Concepts. Dagstuhl Follow-Ups, Volume 1, pp. 11-29, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2010)

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@InCollection{zeckzer_et_al:DFU.SciViz.2010.11,
  author =	{Zeckzer, Dirk and Chen, Fang and Hagen, Hans},
  title =	{{Computing an Optimal Layout for Cone Trees}},
  booktitle =	{Scientific Visualization: Advanced Concepts},
  pages =	{11--29},
  series =	{Dagstuhl Follow-Ups},
  ISBN =	{978-3-939897-19-4},
  ISSN =	{1868-8977},
  year =	{2010},
  volume =	{1},
  editor =	{Hagen, Hans},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DFU.SciViz.2010.11},
  URN =		{urn:nbn:de:0030-drops-26947},
  doi =		{10.4230/DFU.SciViz.2010.11},
  annote =	{Keywords: Cone Trees, Information Visualization, Tree Layout}
}
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