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Daniel Steffen

Contact Data

Phone+49 631 205-5125
E-mailsteffen[at]cs.uni-kl.de
OfficeBuilding 48, Room 454
Gottlieb-Daimler-Straße
67663 Kaiserslautern
Germany

Research Interests

  • Human-centered interaction and visualization
  • Wearable computing and human analytics
  • Interactive system design

Curriculum Vitae

01/2015 - nowResearcher, AG wearHEALTH, University of Kaiserslautern
01/2014 - 02/2016Head of Research and Development, GraphicsMedia.net GmbH, Kaiserslautern
08/2007 - 12/2014Researcher, German Research Center for Artificial Intelligence (DFKI) GmbH, Kaiserslautern
08/2006 - 07/2007Scholarship holder, University of Kaiserslautern
10/2000 - 07/2006Study of Computer Science, University of Kaiserslautern
Degree: Dipl.-Inf.
05/1999 - 09/2000PR Secretary, Administrative district Cochem-Zell, Cochem, Germany
07/1998 - 04/1999German Compulsory Military Service, Budel, Netherlands
07/1995 - 06/1998Study of Public Administration, University of applied sciences for Public Administration Rhineland-Palatinate, Mayen
Degree: Dipl. Verw.-Wirt (FH)

Publications

2017

Steffen, D., Christmann, C.A., Teufl, W. and Bleser, G. (2017), No Game, No Pain? Towards a Mobile Exergame for Rehabilitation, In CHI PLAY'17 Extended Abstracts. Amsterdam, Netherlands
Abstract: Exergames are considered useful to facilitate specific exercises in rehabilitation. This context, however, raises questions regarding pain management: How do we have to consider pain sensations in game design? Beside some rules to avoid overexertion, these important aspects have rather been neglected in prior research.
Within this contribution we address these questions and present an example of a mobile exergame for thrombosis prophylaxis. In a pilot study, 40 healthy young adults rated their subjective pain sensation on a numeric rating scale before and after having completed one of two versions of the exergame (counting of exercise repetitions only vs. controlling a beach ball through exercise repetitions). Beside possible effects of gender and level of fitness on pain reports, we focus on limitations that should be addressed in future research.
BibTeX:
@inproceedings{Steffen2017a,
  author = {Daniel Steffen and Corinna Anna Christmann and Wolfgang Teufl and Gabriele Bleser},
  title = {No Game, No Pain? Towards a Mobile Exergame for Rehabilitation},
  booktitle = {CHI PLAY'17 Extended Abstracts},
  year = {2017},
  doi = {10.1145/3130859.3131310}
}
Steffen, D., Christmann, C.A. and Bleser, G. (2017), jumpBALL - Ein mobiles Exergame für die Thromboseprophylaxe, In Mensch und Computer 2017 - Tagungsband. Regensburg, 9, 2017. , pp. 27-36. Gesellschaft für Informatik e.V..
Abstract: Über 37.000 Patienten wurden 2015 bundesweit in Krankenhäusern unter der Hauptdiagnose I80 (Thrombose, Phlebitis und Thrombophlebitis) behandelt. Bewegungsübungen, wie beispielsweise die Muskel-Venen-Pumpe, werden als allgemeine Basismaßnahmen zur Thromboseprophylaxe für alle Risikogruppen empfohlen. Allerdings können solche repetitiven Übungen schnell monoton und langweilig werden, wodurch die Motivation des Patienten sinkt und die Therapietreue gefährdet wird. Das mobile Exergame jumpBALL adressiert die zuvor beschriebene Problematik und unterstützt und motiviert bei der Durchführung der Muskel-Venen-Pumpe. jumpBALL verwendet zwei drahtlose, inertiale Messeinheiten zur Erfassung der Fußbewegungen und zur Interaktion mit dem Spiel, welches auf einem Tablet PC läuft. jumpBALL kann sowohl im stationären als auch im post-stationären Bereich zur Thromboseprophylaxe eingesetzt werden. Anhand einer experimentellen Benutzerstudie mit Studierenden und Angestellten (N = 40) konnte gezeigt werden, dass sich durch den Einsatz von jumpBALL die Wiederholungshäufigkeit der Muskel-Venen-Pumpe und die Übungsdauer im Vergleich zu einer Kontrollversion der App, bei der die Anzahl der Wiederholungen ohne spielerische Einbettung lediglich gezählt wird, signifikant steigern lässt.
BibTeX:
@inproceedings{Steffen2017,
  author = {Steffen, Daniel and Christmann, Corinna Anna and Bleser, Gabriele},
  editor = {Burghardt, Manuel AND Wimmer, Raphael AND Wolff, Christian AND Womser-Hacker, Christa},
  title = {jumpBALL - Ein mobiles Exergame für die Thromboseprophylaxe},
  booktitle = {Mensch und Computer 2017 - Tagungsband},
  publisher = {Gesellschaft für Informatik e.V.},
  year = {2017},
  pages = {27-36},
  url = {http://dx.doi.org/10.18420/muc2017-mci-0198},
  doi = {10.18420/muc2017-mci-0198}
}
Bleser, G., Christmann, C.A., Taetz, B., Steffen Daniel, Hoffmann, A. and Miezal, M. (2017), Identification of Medically Relevant Application Scenarios for A Wearable Motion Analysis System, In Informatik, Workshop: Partizipatives Entwerfen soziotechnischer Systeme (accepted).
Abstract: This abstract presents the iterative and multi-perspective context of use analysis approach of the interdisciplinary junior research group wearHEALTH for identifying medically relevant application scenarios and required features for a motion analysis system based on inertial motion capture technology. Different iterations of one underlying process are described and discussed. The focus is on how all participating research disciplines as well as potential users in terms of healthcare providers can be involved into this process on equal footing.
BibTeX:
@inproceedings{Bleser2017,
  author = {Bleser, Gabriele and Christmann, Corinna Anna and Taetz, Bertram and Steffen, Daniel, and Hoffmann, Alexandra and Miezal, Markus},
  title = {Identification of Medically Relevant Application Scenarios for A Wearable Motion Analysis System},
  booktitle = {Informatik, Workshop: Partizipatives Entwerfen soziotechnischer Systeme (accepted)},
  year = {2017}
}
Bleser, G., Taetz, B., Miezal, M., Christmann, C.A., Steffen, D. and Regenspurger, K. (2017), Development of an Inertial Motion Capture System for Clinical Application, iCOM., 08, 2017. Vol. 16(2), pp. 113-129.
Abstract: The ability to capture human motion based on wearable sensors has a wide range of applications, e.g., in healthcare, sports, well-being, and workflow analysis. This article focuses on the development of an online-capable system for accurately capturing joint kinematics based on inertial measurement units (IMUs) and its clinical application, with a focus on locomotion analysis for rehabilitation. The article approaches the topic from the technology and application perspectives and fuses both points of view. It presents, in a self-contained way, previous results from three studies as well as new results concerning the technological development of the system. It also correlates these with new results from qualitative expert interviews with medical practitioners and movement scientists. The interviews were conducted for the purpose of identifying relevant application scenarios and requirements for the technology used. As a result, the potentials of the system for the different identified application scenarios are discussed and necessary next steps are deduced from this analysis.
BibTeX:
@article{Bleser2017a,
  author = {Gabriele Bleser and Bertram Taetz and Markus Miezal and Corinna Anna Christmann and Daniel Steffen and Katja Regenspurger},
  title = {Development of an Inertial Motion Capture System for Clinical Application},
  journal = {iCOM},
  year = {2017},
  volume = {16},
  number = {2},
  pages = {113-129},
  doi = {10.1515/icom-2017-0010}
}

2015

Bergner, B. and Steffen, D. (2015), The role of user-generated emotion data and their optimized visualization for planning decision making, In AESOP Annual Congress 2015: Definite space: fuzzy responsibility. Prague, July, 2015. , pp. 2216-2230.
Abstract: With the rise of wearable technologies in the field of ambulatory assessment and commercial body monitoring products, the human being itself becomes a sensor of its immediate environment. In particular, user-generated vital data allows to draw conclusions from peoples’ emotions at every time and everywhere. This fact poses the question to what extent this data can be used for planning decision making. For decades, ambulatory assessment methods have been used to identify humans’ emotions linked to distinctive stimuli. The research is mostly done in laboratories under controlled conditions. Knowledge transfer to real world applications is still rare due to many uncontrollable environmental issues. Psychophysiological monitoring, however, shows high potential of transferability to real-world studies. If this user-generated emotion data is to be used for planning decision processes, many challenges have to be met: a) providing valid physiological, geo-referenced data in a real world environment, b) preparing and processing data for following analyses, c) joining individual and environmental meta data, d) optimizing emerging visualizations and identifying emotional stimuli as basis for planning decision-making. The research at hand confronts these challenges, exemplified by a case study in the field of urban safety and security. It aims at identifying stress eliciting stimuli during an open air event. The methodical approach comprises physiological data collection and analyses, standardized questionnaires of stress experience and event perception, subjective self-assessments and spatial analyses of the surroundings as well as the combination of the results in different GIS-based visualization techniques.
BibTeX:
@inproceedings{Bergner2015,
  author = {Bergner, Benjamin and Steffen, Daniel},
  editor = {Macoun, Milan and Maier, Karel},
  title = {The role of user-generated emotion data and their optimized visualization for planning decision making},
  booktitle = {AESOP Annual Congress 2015: Definite space: fuzzy responsibility},
  year = {2015},
  pages = {2216--2230}
}
Bleser, G., Steffen, D., Reiss, A., Weber, M., Hendeby, G. and Fradet, L. (2015), Personalized Physical Activity Monitoring Using Wearable Sensors, In Smart Health: Open Problems and Future Challenges. Cham , pp. 99-124. Springer International Publishing.
Abstract: It is a well-known fact that exercising helps people improve their overall well-being; both physiological and psychological health. Regular moderate physical activity improves the risk of disease progression, improves the chances for successful rehabilitation, and lowers the levels of stress hormones. Physical fitness can be categorized in cardiovascular fitness, and muscular strength and endurance. A proper balance between aerobic activities and strength exercises are important to maximize the positive effects. This balance is not always easily obtained, so assistance tools are important. Hence, ambient assisted living (AAL) systems that support and motivate balanced training are desirable. This chapter presents methods to provide this, focusing on the methodologies and concepts implemented by the authors in the physical activity monitoring for aging people (PAMAP) platform. The chapter sets the stage for an architecture to provide personalized activity monitoring using a network of wearable sensors, mainly inertial measurement units (IMU). The main focus is then to describe how to do this in a personalizable way: (1) monitoring to provide an estimate of aerobic activities performed, for which a boosting based method to determine activity type, intensity, frequency, and duration is given; (2) supervise and coach strength activities. Here, methodologies are described for obtaining the parameters needed to provide real-time useful feedback to the user about how to exercise safely using the right technique.
BibTeX:
@inbook{Bleser2015,
  author = {Bleser, Gabriele and Steffen, Daniel and Reiss, Attila and Weber, Markus and Hendeby, Gustaf and Fradet, Laetitia},
  editor = {Holzinger, Andreas and Röcker, Carsten and Ziefle, Martina},
  title = {Personalized Physical Activity Monitoring Using Wearable Sensors},
  booktitle = {Smart Health: Open Problems and Future Challenges},
  publisher = {Springer International Publishing},
  year = {2015},
  pages = {99--124},
  url = {http://dx.doi.org/10.1007/978-3-319-16226-3_5},
  doi = {10.1007/978-3-319-16226-3_5}
}
Exner, J.-P., Borschart, D., Steffen, D., Zeile, P. and Schächinger, H. (2015), SensorMapRT – a System for Real-Time Acquisition, Visualization and Analysis of Mobile Sensor Data in an Urban Context, In Proceedings REAL CORP 2015 Tagungsband. Schwechat , pp. 855 - 860. Eigenverlag des Vereins CORP.
Abstract: The use of wearables in citizens’ daily life will increase significantly in the coming years. By analyzing these sensor data, it is possible to detect the emotional well-being in urban areas, which is highly relevant for urban planning purposes. Through the combination of several physiological and other sensor data such as GPS, "stress spots" in the urban environment can be recognized and located. A major objective of this project is therefore, to combine and evaluate various research approaches in the field of human as sensorswith wearables. This is the reason why the project group will be an interdisciplinary cooperation between spatial planning, psychophysiology and computer technology.Together with the project partner cities of Neustadt an der Weinstraße and Pirmasens in the German Federal State Rhineland-Palatine, the project group aims to show exemplary the influence of potential stressing factors in the urban area such as traffic and noise and creates scientifically-robust models of stress detection in urban areas. Besides this, a visualization for planning purposes with the tool GeoVisualizer as well as an evaluation of the resilience of such informtion and their potential use for urban planning is aim of the project.
BibTeX:
@inproceedings{Exner2015,
  author = {Exner, Jan-Philipp and Borschart, Daniel and Steffen, Daniel and Zeile, Peter and Schächinger, Hartmut},
  editor = {Manfred Schrenk and Vasily Popovich and Peter Zeile and Pietro Elisei},
  title = {SensorMapRT – a System for Real-Time Acquisition, Visualization and Analysis of Mobile Sensor Data in an Urban Context},
  booktitle = {Proceedings REAL CORP 2015 Tagungsband},
  publisher = {Eigenverlag des Vereins CORP},
  year = {2015},
  pages = {855 -- 860},
  note = {Real CORP 2015, Ghent; 2015-05-05 -- 2015-05-07},
  url = {http://www.corp.at}
}

2013

Bleser, G., Reiss, A., Steffen, D., Weber, M. and Stricker, D. (2013), Ergebnisse des AAL Projektes PAMAP - Physical Activity Monitoring for Aging People. Thesis at: Deutsches Forschungszentrum für Künstliche Intelligenz. Trippstadter Straße 122 67663 Kaiserslautern, 2, 2013. Vol. 13-01, pp. 24.
Abstract: Innerhalb des europäischen AAL Rahmenprojektes PAMAP wurde ein Sensor-basiertes Aktivitäts-Monitoring-System für ältere Menschen entwickelt. Dieses System richtet sich sowohl an gesunde, als auch an eingeschränkte Menschen und kann sowohl in einer klinischen Umgebung oder speziellen Strukturen, als auch im alltäglichen häuslichen Bereich zum Zweck der Prävention und der Rehabilitation eingesetzt werden. Innerhalb dieses Rahmenprojektes hat das DFKI konkret entsprechende Aktivitäts-Monitoring-Verfahren mittels körpergetragener Sensorik (hauptsächlich inertiale Messeinheiten (IMUs)) und interaktive Visualisierungen der Auswertungsergebnisse, insbesondere während der Ausführung körperlicher Aktivitäten, das heißt in einem Echtzeit-Kontext, erforscht und entwickelt. Gegenüber existierenden Monitoring-Systemen bietet das finale System höhere Flexibilität, Präzision und Funktionalität. Es erlaubt die überwachung allgemeiner Aktivitätsparameter sowie die überwachung und Unterstützung spezifischer übungen mit einem Echtzeit-Feedback. Letztere Komponente basiert auf einem generischen Konzept, bei dem übungen eingelernt und so personalisiert unterstützt werden können. Die wissenschaftliche und technologische Basis des Systems besteht aus Methoden des maschinellen Lernens und der Klassifikation, stochastischen Modellen und Methoden der Mustererkennung sowie Methoden der modellbasierten Sensorfusion.
BibTeX:
@techreport{Bleser2013,
  author = {Gabriele Bleser and Attila Reiss and Daniel Steffen and Markus Weber and Didier Stricker},
  title = {Ergebnisse des AAL Projektes PAMAP - Physical Activity Monitoring for Aging People},
  school = {Deutsches Forschungszentrum für Künstliche Intelligenz},
  year = {2013},
  volume = {13-01},
  pages = {24},
  url = {http://www.dfki.de/web/forschung/av/publikationen/renameFileForDownload?filename=PAMAP_TR_20130219.pdf&file_id=uploads_1929}
}
Michel, F., Steffen, D., Bergner, B., Exner, J.-P. and Zeile, P. (2013), A new Approach in the Visualization of Georeferenced Sensor Data in Spatial Planning, In Proceedings REAL CORP 2013 Tagungsband. Schwechat Eigenverlag des Vereins CORP.
Abstract: There are multiple ways to visualize geotagged information. The most commonly used tools are GIS (Geospatial Information Systems) to show the data on a 2D map. For 3D visualization of geospatial information only a few systems exist, e.g. Google Earth, NASA World Wind, etc., which only provide basic visualization techniques and also only allow to visualize a small number of data attributes at the same time. In addition the user has to put a lot of effort into producing meaningful visualizations to be able to compare and analyze the data. In this paper we present a new approach to the visualization of geotagged sensory data in the context of spatial planning. We use a tool called GeoVisualizer, which aims at providing planners the possibility to show and analyze their multivariate sensory data in a 3D geospatial context. In a cooperation project between DFKI and CPE, a variety of human sensory assessment test data sets, recorded with the BMS Smartband, were visualized. The Smartband is a small wristband that can detect negative arousals of test people. In combination with a GPS device, it is possible to geotag “stress hotspots” in a city. Recorded situations in this paper are for example how people feel during a hike in the forest, watching a football game, going through the city in crowded situations or walking along a touristic path. The focus of the presented new workflow is not only to integrate sensor data, but also traditional sources like WebMapSevices and 3D-content from KMZ files in order to combine them in a way which can be used for various kinds of urban planning projects. The paper will give a short overview of GeoVisualizer and present a planner’s workflow how to integrate their data and how they can edit the look of the integrated data in a fast and easy way.
BibTeX:
@inproceedings{Michel2013,
  author = {Frank Michel and Daniel Steffen and Benjamin Bergner and Jan-Philipp Exner and Peter Zeile},
  editor = {Manfred Schrenk and Vasily Popovich and Peter Zeile and Pietro Elisei},
  title = {A new Approach in the Visualization of Georeferenced Sensor Data in Spatial Planning},
  booktitle = {Proceedings REAL CORP 2013 Tagungsband},
  publisher = {Eigenverlag des Vereins CORP},
  year = {2013},
  note = {Real CORP 2013, Rom; 2013-05-20 -- 2013-05-23},
  url = {http://publik.tuwien.ac.at/files/PubDat_218257.pdf}
}
Steffen, D., Michel, F., Bergner, B., Exner, J.-P. and Zeile, P. (2013), GeoVisualizer - Ein neuer Ansatz zur Visualisierung von Sensordaten im raumplanerischen Kontext, In Angewandte Geoinformatik 2013 - Beiträge zum 25.AGIT-Symposium (AGIT). Wichmann Verlag.
Abstract: Der vorliegende Beitrag stellt einen neuen Ansatz zur Visualisierung von georeferenzierten, sensorbasierten Daten im (raum-) planerischen Kontext dar. Dazu wurde das Tool GeoVi-sualizer entwickelt, welches dem Planer ein Instrument zur Verfügung stellt, um schnell und einfach multivariate Sensordaten in einem dreidimensionalen geographischen Kontext zu visualisieren und zu analysieren. Mithilfe dieser Applikation werden Daten aus ver-schiedenen Testprojekten zur Humansensorik im urbanen Raum visualisiert. Beispielhafte Anwendungsfälle hierfür sind der Besuch eines Fußballspiels (statische Daten) sowie der Weg vom Stadion in die Innenstadt (dynamische Daten). Die identifizierten „Stress Hot-spots“ können auf der Plattform GeoVisualizer in Kombination mit anderen, klassischen Web Map Services (WMS) und standardisierten Auszeichnungssprachen (z. B. KML-Dokumente) frei kombiniert dargestellt werden und somit für weitere raumplanerische Fragestellungen verwendet werden.
BibTeX:
@inproceedings{Steffen2013,
  author = {Daniel Steffen and Frank Michel and Benjamin Bergner and Jan-Philipp Exner and Peter Zeile},
  title = {GeoVisualizer - Ein neuer Ansatz zur Visualisierung von Sensordaten im raumplanerischen Kontext},
  booktitle = {Angewandte Geoinformatik 2013 - Beiträge zum 25.AGIT-Symposium (AGIT)},
  publisher = {Wichmann Verlag},
  year = {2013},
  note = {To be published}
}
Steffen, D. and Michel, F. (2013), VISWIZ - A Visualization Toolkit for 3-D / 4-D Geospatioal Data Representation, In GeoViz Hamburg Workshop., 3, 2013.
Abstract: Three dimensional data representation and visualization are common features of modern geographic information systems (GIS). However, the research related to the visualization of real world 3-D data is mostly shifted to the computer graphics society. Also the aspect of 4-D - given by adding time as a fourth dimension to the spatial data representation - is mostly neglected. Many stand-alone applications and plug-ins have been developed to visualize 3-D models for a variety of applications. A fully integrated and easy-to-use 3-D GIS solution is currently not available. We address the problem by introducing an easy-to-use and extensible toolkit for visualizations called VisWiz. Here, we focus on a intuitive interface to support the user in selecting a suitable state-of-the-art 3-D visualization technique both in the sense of scientific and information visualization to analyze the data rapidly. The VisWiz is designed to support users in selecting a suitable visualization technique for arbitrary data. This is even more important if the user is not familiar with visualization in general or the content of the data. In order to be usable for a wide variety of data sources and by a broad user group, great emphasis was put on the following points for the design of the VisWiz: independence from data source, extendable visualization collection, intelligent visualization proposal, and simple user interaction. The integration and extension of visualization techniques was set up as a plugin architecture using the Service Provider Interface (SPI). It can be used to easily extend the collection of visualization techniques. During our talk we will illustrate the benefits of the extensible architecture with respect to basic, advanced, as well as customized visualizations. Finally, we will demonstrate different visualization techniques (e.g. algorithm for 3-D isosurfaces, animation of 3-D visualizations based on time series, etc.) and the integration of the VisWiz into the utilized NASA World Wind SDK. The World Wind SDK is a free and open source Java-API for a virtual globe released under the NASA Open Source Agreement. The framework provides a powerful platform for giving the basic means to express and manipulate data. It already provides a Virtual Globe metaphor, improved navigation capabilities and support for basic geospatial services. The VisWiz enhances those features and can be easily integrated into any application which is based on the World Wind SDK. The presented work is part of the SUDPLAN (Sustainable Urban Development Planner for Climate Change Adaptation) project [3]. It offers an easy-to-use web-based planning, prediction, decision support and training tool, for the use in an urban context, based on a what-if scenario execution environment. This tool is based on an innovative and visionary capacity to link, in an ad-hoc fashion, existing environmental simulation models, information and sensor infrastructures, spatial data infrastructures and climatic scenario information in a service-oriented approach, as part of the Single Information Space in Europe for the Environment (SISE). SUDPLAN is a project co-funded by the European Framework Program 7, under challenge ICT-2009-6.4 ICT for Environmental Services and Climate Change Adaptation of the Information and Communication Technologies program, project number 247708.
BibTeX:
@inproceedings{Steffen2013a,
  author = {Daniel Steffen and Frank Michel},
  title = {VISWIZ - A Visualization Toolkit for 3-D / 4-D Geospatioal Data Representation},
  booktitle = {GeoViz Hamburg Workshop},
  year = {2013}
}

2012

Lamprinos, I. and Steffen, D. (2012), Physical Activity Monitoring for the Aging Population, In IADIS International Conference e-Health 2012. IADIS International Conference e-Health, located at MCCSIS 2012 IADIS Multi Conference on Computer Science and Information Systems, July 17-19, Lisbon, Portugal., IADIS e-Health 2012, July, 17-19, 2012, Lisbon, Portugal., 7, 2012. o.A..
Abstract: A significant aspect of the modern, holistic and decentralized health care is the provision of out-of-hospital physical rehabilitation and physical activity monitoring services to frail and aged people. Physical activity monitoring is also meaningful for healthy subjects, as it contributes to the assessment of their wellbeing and enhances their interaction with trainees and teammates. The PAMAP system monitors and analyses physical activity and provides its users and their supervisors with valuable feedback. It helps the subjects to perform rehabilitation related activities and monitor the level of their activity. It also provides them with personal health record service, via interactive TV and smart phone interfaces.
BibTeX:
@inproceedings{Lamprinos2012,
  author = {Ilias Lamprinos and Daniel Steffen},
  title = {Physical Activity Monitoring for the Aging Population},
  booktitle = {IADIS International Conference e-Health 2012. IADIS International Conference e-Health, located at MCCSIS 2012 IADIS Multi Conference on Computer Science and Information Systems, July 17-19, Lisbon, Portugal},
  publisher = {o.A.},
  year = {2012}
}
Michel, F., Steffen, D., Schlobinski, S. and Sander, S. (2012), Considering the Impact of Future Climate Change on the Resilience of a City - Surface Run-Off due to Heavy Storm Events in the City of Wuppertal, In Proceedings REAL CORP 2012 Tagungsband., 17th International Conference on Urban Planning and Regional Development in the Information Society, GeoMultimedia 2012, May 14-16, 2012, Schwechat, Austria., 5, 2012. o.A..
Abstract: Environmental events are a big concern when looking at the safety and resilience of a city. This is even more true if climate change scenarios, and thus changed environmental conditions, are taken into account. Within the European FP7 Research Project SUDPLAN (Sustainable Urban Development Planner for Climate Change Adaptation) a Scenario Management System (SMS) is under development. The SMS combines large scale climate change models, downscaled model results and local high resolution simulations with interactive 3-D/4-D visualisations to facilitate the analysis of future climate change effects on city-scale environments.
The system will be applied by four european pilot cities which are part of the consortium: Stockholm, Linz, Prague, and Wuppertal. The project adresses the environmental topics air quality (e.g. temperature, emissions, etc.) and rainfall. In the case of rainfall, major concerns are combined sewage overflow (CSO) and surface run-off due to heavy rainfall events. Due to the geographical situation of the german city of Wuppertal located in the steep, narrow, long valley of the Wupper river, the main concern regarding climate change impact is uncontrollable, extremely localized run-off from increased heavy, short rainfall events. The potential damage of public infrastructure and of private property is a major concern to the city managers. The potential needs for investments are huge, considering that the city copes with run-off from 350 kilometers of creeks (over 800 creek sections) and 650 kilometers of drainage channel system. To enhance the public awareness for investments due to future risks related to a changed climate, means to transport complex domain specific results into a clear and easy to understand “language” are needed.
In this paper we present the current results of the SUDPLAN project concerning the Wuppertal pilot. We will describe the workflow from the large scale climate model to the 3D/4D visualisation of local high resolution simulation results. We focus on the intuitive and easy to understand presentation of the effects on the resilience and safety of critical public and private infrastructures.
We combine widely used GIS features with highly interactive 3D/4D visualisation in order to provide insight into possible future problems caused by heavy rainfall events. This can be used for the analysis and comparison of simulation results from different climate and planning scenarios by domain experts (i.e. climate modellers) as well as endusers (i.e. urban planners). Moreover, the presented results are also suitable to illustrate and convey the necessity of investments even for non-experts (e.g. city administration, property owners, etc.).
BibTeX:
@inproceedings{Michel2012,
  author = {Frank Michel and Daniel Steffen and Sascha Schlobinski and Stefan Sander},
  title = {Considering the Impact of Future Climate Change on the Resilience of a City - Surface Run-Off due to Heavy Storm Events in the City of Wuppertal},
  booktitle = {Proceedings REAL CORP 2012 Tagungsband},
  publisher = {o.A.},
  year = {2012}
}
Steffen, D. and Stricker, D. (2012), Twist - A Scalable Technique for Touch and Touchless Interaction, In International Conference on Interfaces and Human Computer Interaction. IADIS International Conference on Interfaces and Human Computer Interaction (IHCI-2012), July 21-23, Lisbon, Portugal., International Conference on Interfaces and Human Computer Interaction, July 21-23, 2012, Lisbon, Portugal., 7, 2012. o.A..
Abstract: Multi-touch interaction with small devices as well as touchless interaction has received much attention in recent years. Mobile touch devices (e.g. tablet computers and smart phones) allow users to interact directly with what is displayed on a screen. Modern gesture recognition systems using 3-D depth cameras (e.g. Microsoft’s Kinect™) enable users to control and interact with large screens without the need of touching. Both interaction techniques, however, suffer from the limitations of the human physiology and/or the resolution of the employed input device. When selecting a small area on a touch device the minimal selection distance is determined by the size of the user’s finger tips. In the case of using a 3-D depth camera as input device the resolution of the camera is the limiting factor e.g. if the user's hands are close together or his distance to the camera is too large the body parts are indistinguishable. We address the problem by introducing a new gesture which scales for touch and touchless interaction devices. We present a solution how to overcome the limited input resolution of a device (e.g. camera or multi-touch device) for a onedimensional scaling technique by using a new gesture called Twist. Instead of bringing the fingers / hands closer to each other the user simply twists them at a given distance. Finally, we illustrate shortly two scenarios that benefit from using the Twist gesture.
BibTeX:
@inproceedings{Steffen2012,
  author = {Daniel Steffen and Didier Stricker},
  title = {Twist - A Scalable Technique for Touch and Touchless Interaction},
  booktitle = {International Conference on Interfaces and Human Computer Interaction. IADIS International Conference on Interfaces and Human Computer Interaction (IHCI-2012), July 21-23, Lisbon, Portugal},
  publisher = {o.A.},
  year = {2012}
}

2011

Magin, D. and Steffen, D. (2011), SELECT'N'LABEL - Dynamic Boundary Label Placement for Mobile Touch Devices, In International Conference on Interfaces and Human Computer Interaction. IADIS International Conference on Interfaces and Human Computer Interaction (IHCI-2011), July 24-26, Rome, Italy.
Abstract: Including 3G, long battery life, and touch screens, mobile devices are about to replace notebooks and desktop computers. In professional practice, such as map-based large area maintenance jobs, mobile devices allow users to have only one device with all necessary information. However, the usually lower performance of such devices, reduced display size, and touch interaction limit the amount of information to be displayed. This paper introduces the SELECT’N’LABEL technique: a dynamic label selection approach to interact with a labeled map and to select labels in an area of interest illustrated with a fisheye magnification. Furthermore, we introduce a dedicated 3-sided boundary label placement algorithm for mobile touch devices. Here, we consider performance, display size, and interaction mode.
BibTeX:
@inproceedings{Magin2011,
  author = {Dominik Magin and Daniel Steffen},
  title = {SELECT'N'LABEL - Dynamic Boundary Label Placement for Mobile Touch Devices},
  booktitle = {International Conference on Interfaces and Human Computer Interaction. IADIS International Conference on Interfaces and Human Computer Interaction (IHCI-2011), July 24-26, Rome, Italy},
  year = {2011}
}
Steffen, D. and Stricker, D. (2011), pamap - Digitaler Fitness-Coach für Senioren, In Demographischer Wandel - Assistenzsysteme aus der Forschung in den Markt (AAL 2011). Deutscher AAL-Kongress (AAL-11), January 25-26, Berlin, Germany. VDE VERLAG GMBH, Berlin-Offenbach.
Abstract: Die fortschreitende Alterung der Gesellschaft wird die Gesundheitssysteme vor erhebliche finanzielle Schwierigkeiten stellen. Ein hohes Alter in guter Gesundheit ist daher ein langfristiges Ziel. Neben geistiger Aktivität und einer gesunden Ernährung beugen regelmäßige körperliche Bewegung im Alltag und in der Freizeit vielen chronischen und altersbedingten Erkrankungen vor. Aktuelle Studien belegen jedoch, dass 40-60 % der Bevölkerung in der Europäischen Union eine bewegungsarme Lebensweise führen. Die vorliegende Publikation beschreibt den Prototyp pamap, einen digitalen Fitness-Coach, welcher Senioren bei körperlichen Aktivitäten überwacht und motiviert. Das für Senioren entwickelte Assistenzsystem unterstützt beim Fitnesstraining in der Freizeit und bei der Durchführung von Rehabilitationsmaßnahmen. Zentrales Element ist ein mobiles Sensornetzwerk. Inertiale Messeinheiten erfassen die Bewegungen des Nutzers. Der Sensordatenstrom wird analysiert und anhand eines virtuellen Charakters auf einem TV-Gerät wiedergegeben. Gleichzeitig erhält der Anwender eine benutzerorientierte Rückmeldung über Qualität und Quantität seiner Bewegungen. Die gewonnen Informationen werden via Internet an eine elektronische Gesundheitsakte (electronic health record - EHR) übertragen und für aktuelle und zukünftige Behandlungen zur Verfügung gestellt.
BibTeX:
@inproceedings{Steffen2011,
  author = {Daniel Steffen and Didier Stricker},
  editor = {VDE and AAL and BMBF},
  title = {pamap - Digitaler Fitness-Coach für Senioren},
  booktitle = {Demographischer Wandel - Assistenzsysteme aus der Forschung in den Markt (AAL 2011). Deutscher AAL-Kongress (AAL-11), January 25-26, Berlin, Germany},
  publisher = {VDE VERLAG GMBH, Berlin-Offenbach},
  year = {2011}
}
Steffen, D., Bleser, G., Weber, M., Stricker, D., Fradet, L. and Marin, F. (2011), A Personalized Exercise Trainer for Elderly, In Pervasive Health Conference 2011. International ICST Conference on Pervasive Computing Technologies for Healthcare (Pervasive Health-201), 5th, May 23-26, Dublin, Ireland., 5, 2011. IEEE Xplore.
Abstract: Physical activity provides many physiological benefits. On the one hand it reduces the risk of disease outcomes. On the other hand it is the basis for proper rehabilitation in case of or after a severe disease. Both aspects are especially important for the elderly population. Within this context, the present paper proposes a personalized, home-based exercise trainer for elderly people. The system is based on a wearable sensor network that enables capturing the user’s motions. These are then evaluated by comparing them to a prescribed exercise, taking both exercise load and technique into account. Moreover, the results are translated into appropriate feedback to the user to assist the correct exercise execution. A novel part of the system is the generic personalization by means of a supervised teach-in phase.
BibTeX:
@inproceedings{Steffen2011a,
  author = {Daniel Steffen and Gabriele Bleser and Markus Weber and Didier Stricker and Laetitia Fradet and Frederic Marin},
  title = {A Personalized Exercise Trainer for Elderly},
  booktitle = {Pervasive Health Conference 2011. International ICST Conference on Pervasive Computing Technologies for Healthcare (Pervasive Health-201), 5th, May 23-26, Dublin, Ireland},
  publisher = {IEEE Xplore},
  year = {2011}
}
Wölle, J., Szczepanski, T., Tschepetzki, R. and Steffen, D. (2011), Mobile Endgeräte zur prädiktiven Überwachung von Kläranlagen, In 18. SIMBA-Anwendertreffen. SIMBA Anwendertreffen, 18. May 17-18, Magdeburg, Germany. Frau Simone Wettig Werner-Heisenberg-Straße 1 39106 Magdeburg Tel.: 0391 9901461 oder 0391 990140 E-mail: simone.wettig@ifak.eu, 5, 2011. o.A..
BibTeX:
@inproceedings{Woelle2011,
  author = {Jürgen Wölle and Thorsten Szczepanski and Ralf Tschepetzki and Daniel Steffen},
  title = {Mobile Endgeräte zur prädiktiven Überwachung von Kläranlagen},
  booktitle = {18. SIMBA-Anwendertreffen. SIMBA Anwendertreffen, 18. May 17-18, Magdeburg, Germany},
  publisher = {o.A.},
  year = {2011}
}
Wölle, J., Steffen, D., Tschepetzki, R. and Szczepanski, T. (2011), Mobile integrierte Datenplattform für die prädiktive Überwachung von Kläranlagen, In VDI/VDE-Fachtagung Meß- und Regeltechnik in abwassertechnischen Anlagen. Fulda, 10, 2011.
Abstract: Im Rahmen des von Bundesministerium für Bildung und Forschung (BMBF) geförderten Verbundprojektes „SYNERGIE - Entwicklung und Erprobung eines Systems zur Optimierung der Energieeffizienz von kommunalen Kläranlagen durch Intelligentes Wissensmanagement“ wird u.a. der Einsatz mobiler Endgeräte als Hilfsmittel bei der Überwachung und dem Betrieb kommunaler Kläranlagen untersucht. Die technischen Voraussetzungen zur Einbindung solcher Geräte in die lokale Prozessleittechnik sowie das Datenmanagement spielen dabei, neben dem Einsatz innovativer Visualisierungstechniken, eine zentrale Rolle. Die Fähigkeiten aktueller mobiler Endgeräte wie z.B. Apples iPad® ermöglichen mobile Anwendungen, die Benutzern auch im Umfeld von Kläranlagen eine adäquate Unterstützung liefern. Mobilität und technische Einschränkungen erschweren jedoch die einfache Portierung der Darstellung von Desktop-Anwendungen auf mobile Endgeräte. Beispielsweise erfordern große Datenmengen aus dem Prozessleitsystem und eingeschränkte Bildschirmgröße/-auflösung neue Verfahren, welche eine adäquate Visualisierung komplexer Datenmengen auf den mobilen Endgeräten gewährleisten. Vor diesem Hintergrund beschreibt die vorliegende Publikation ein Verfahren zur Annotation der auf Kläranlagen anfallenden großen Datenmengen mittels eines mobilen Endgerätes auf der Basis von GPS-Positionen und Baugruppen. Eine große Anzahl von Beschriftungen führt schnell zur Unübersichtlichkeit (Informationsüberflutung) und zu Schwierigkeiten in der Interaktion. Der präsentierte Ansatz berücksichtigt dabei eine große Anzahl von Beschriftungen und deren Gruppierung bei reduzierter Bildschirmgröße. Letztlich berücksichtigt das Verfahren technische Aspekte wie Datentransfer. Auf Basis der GPS-Position des Anwenders werden zunächst Daten und Information in einem festgelegten Umkreis geladen und dargestellt. Im Anschluss werden weitere Informationen vom zentralen System nachgeladen. Zentrale Elemente des Datenmanagements stellen eine Reihe verknüpfter Ontologien dar, welche die Semantik zu den unterschiedlichen Daten und Informationen liefern. Neben den grundlegenden Informationen zu den unterschiedlichen Datentypen und Datenquellen der darzustellenden Informationen enthalten diese Ontologien auch komplexere Zusammenhänge in Form verfahrenstechnischer und geographischer (Daten-)Modelle einer betrachteten Kläranlage. Speziell die letztgenannten Datenmodelle erlauben im Hinblick auf die bereits genannten Einschränkungen mobiler Endgeräte eine kontext- und ortsbezogene Auswahl und Gruppierung der darzustellenden Informationen und steigern die Effizienz des Datentransfers bei eingeschränkten Bandbreiten. Im Rahmen dieser Veröffentlichung wird ein solches für Kläranlagen entwickeltes Datenmodell vorgestellt. Technisch umgesetzt wurden die Ontologien in Form von frame-basierten Wissenbasen mit Hilfe des OpenSource Ontologie Editors Protégé des Stanford Center for Biomedical Informatics Research an der Stanford University School of Medicine. Dieser in Java® programmierte und damit plattformunabhängige Ontologie Editor ermöglicht eine Wissensrepräsentation kompatibel zum Open Knowledge Base Connectivity Protocol (OKBC) und gewährleistet so die universelle Wiederverwendbarkeit der entwickelten Wissensstrukturen. Als Basis der Interkommunikation der verschiedenen Systemkomponenten wurde für die anlagenbezogenen Untersuchungen auf der Kläranlage Monsheim des Abwasserzweckverbands Mittleres Pfrimmtal OPC-UA (Unified Architecture) ausgewählt. Basierend auf der Funktionalität der OPC-Spezifikation (Data Access DA, Alarm & Events A&E, Historical Data Access HDA, Commands, Complex Data) wurde von der OPC Foundation ein neuer Standard geschaffen, der vollständig in serviceorientierter Architektur (SOA) umgesetzt wurde. Mit OPC-UA ist somit ein allgemeiner Standard für die herstellerunabhängige Kommunikation in der Automatisierungstechnik gegeben. Dieser neue Ansatz ist plattformunabhängig, skalierbar und hoch performant. Dies ermöglicht den Einsatz in Kleinstgeräten der Prozess- und Messtechnik mit speziellen Betriebssystemen. Mit einem erweiterten Informationsmodell können komplexe Zusammenhänge von Daten und ihrer Semantik abgebildet werden. Die dafür entwickelten Transportprotokolle stellen höchste Kommunikationsgeschwindigkeit und Interoperabilität bereit. Darüber hinaus bietet OPC-UA Sicherheitsmechanismen wie Authentifizierung, Autorisierung, Verschlüsselung und Datenintegrität basierend auf den neuesten kryptographischen Standards wie Public-Key-Infrastruktur (PKI), Advanced Encryption Standard (AES) und Secure Hash Algorithm
SHA). Abschließend zusammengefasst gibt die vorliegende Publikation am Beispiel der Pilotanwendung auf der Kläranlage Monsheim einen Überblick über die im BMBF-Verbundprojekt SYNERGIE entwickelten bzw. angewendeten Techniken zur Organisation, Übertragung und Visualisierung von Betriebsdaten kommunaler Kläranlagen vor dem Hintergrund der speziellen Anforderungen mobiler Endgeräte.
BibTeX:
@conference{Woelle2011a,
  author = {Jürgen Wölle and Daniel Steffen and Ralf Tschepetzki and Thorsten Szczepanski},
  title = {Mobile integrierte Datenplattform für die prädiktive Überwachung von Kläranlagen},
  booktitle = {VDI/VDE-Fachtagung Meß- und Regeltechnik in abwassertechnischen Anlagen},
  year = {2011}
}

2010

Michel, F. and Steffen, D. (2010), Visualization for Climate Change Adaptation in SUDPLAN, In Proceedings of the 24th International Conference on Informatics for Environmental Protection. International Conference on Informatics for Environmental Protection (EnviroInfo-2010), October 6-8, Bonn, Germany. , pp. 165-168. Shaker Verlag.
Abstract: In this poster we give a short overview of the EU-FP7 project SUDPLAN (Sustainable Urban Development PLAN-ner for Climate Change Adaptation) and present our approach on how to utilize visualization to get more insight into the effects of climate change.
BibTeX:
@inproceedings{Michel2010,
  author = {Frank Michel and Daniel Steffen},
  editor = {Klaus Greve and Armin B. Cremers},
  title = {Visualization for Climate Change Adaptation in SUDPLAN},
  booktitle = {Proceedings of the 24th International Conference on Informatics for Environmental Protection. International Conference on Informatics for Environmental Protection (EnviroInfo-2010), October 6-8, Bonn, Germany},
  publisher = {Shaker Verlag},
  year = {2010},
  pages = {165-168}
}

2009

Deller, M., Thelen, S., Steffen, D., Olech, P.-S., Ebert, A., Malburg, J. and Meyer, J. (2009), A Highly Scalable Rendering Framework for Arbitrary Display and Display-in-Display Configurations, In Proceedings of the 2009 International Conference on Computer Graphics & Virtual Reality. International Conference on Computer Graphics & Virtual Reality (CGVR-2009), located at WorldComp'09, July 13-16, Las Vegas,, NV, United States., 7, 2009. , pp. 164-170. CSREA Press, USA.
Abstract: Large displays are playing an increasingly important role in today's visualization research. One of the most scalable and cost-effective ways to build a large display with appropriately high resolution is by the use of tiled displays. Unfortunately, it is still a rather high overhead to build even simple OpenGL applications that can effectively scale with the size, number and stereoscopic capabilities of theused display devices. In this paper, we present a lightweight renderingframework that gives users a quick and flexible way to implement OpenGL-based applications that scale to an arbitrary number of tiled display devices and several stereo formats. In addition to customary tiled display setups, our framework supports a variety of stereoscopic modes, both for single and tiled diplays, as well as overlapping and display-in-display configurations. To demonstrate this point, we will also present two non-conventional display setups realized with the AnyScreen framework.
BibTeX:
@inproceedings{Deller2009,
  author = {Matthias Deller and Sebastian Thelen and Daniel Steffen and Peter-Scott Olech and Achim Ebert and Jan Malburg and Jörg Meyer},
  editor = {Hamid R. Arabnia and Leonidas Deligiannidis and (Assoc. Editor) Ashu M. G. Solo},
  title = {A Highly Scalable Rendering Framework for Arbitrary Display and Display-in-Display Configurations},
  booktitle = {Proceedings of the 2009 International Conference on Computer Graphics & Virtual Reality. International Conference on Computer Graphics & Virtual Reality (CGVR-2009), located at WorldComp'09, July 13-16, Las Vegas,, NV, United States},
  publisher = {CSREA Press, USA},
  year = {2009},
  pages = {164-170}
}
Ebert, A., Deller, M., Steffen, D. and Heintz, M. (2009), "Where Did I Put That?" - Effectiveness of Kinesthetic Memory in Immersive Virtual Environments, In Universal Access in Human-Computer Interaction. Applications and Services. International Conference on Universal Access in Human-Computer Interaction - Addressing Diversity (UAHCI-2009), 5th, located at HCI International 2009, July 19-24, San Diego,, CA, United States., 7, 2009. Vol. III(5616), pp. 179-188. Springer-Verlag, Berlin/Heidelberg.
Abstract: Kinesthetic memory is an essential factor in human interaction with the outside world. It helps adept keyboard users to type rapidly and hit the keys without having to look at them. It enables musicians to play their instruments without consciously having to think about the necessary movements. And it can help people to find things again, based on the location where they put them. The benefits of kinesthetic memory in the physical world are well known and well used for training or in physical therapy. Yet little effort has been made to examine the effects of kinesthetic memory in a virtual environment. In our paper, we present a user study designed to explore the intensity of kinesthetic memory while interacting with a large screen immersive environment. This could be used to improve the usability and effectiveness of user interfaces for such environments.
BibTeX:
@inproceedings{Ebert2009,
  author = {Achim Ebert and Matthias Deller and Daniel Steffen and Matthias Heintz},
  editor = {Constantine Stephanidis},
  title = {"Where Did I Put That?" - Effectiveness of Kinesthetic Memory in Immersive Virtual Environments},
  booktitle = {Universal Access in Human-Computer Interaction. Applications and Services. International Conference on Universal Access in Human-Computer Interaction - Addressing Diversity (UAHCI-2009), 5th, located at HCI International 2009, July 19-24, San Diego,, CA, United States},
  publisher = {Springer-Verlag, Berlin/Heidelberg},
  year = {2009},
  volume = {III},
  number = {5616},
  pages = {179-188}
}
Steffen, D., Ebert, A., Deller, M. and Dannenmann, P. (2009), five: Enhancing 3D Wall Displays with a 2D High-Resolution Overlay, In Proceedings of the 12th IFIP TC 13 International Conference on Human-Computer Interaction: Part II. Berlin, Heidelberg , pp. 173-186. Springer-Verlag.
Abstract: Projection-based stereoscopic wall displays allow users to immerse themselves into virtual scenes, such as architecture simulations or games. However, the usually low resolution (dpi) of such displays and slight alignment offsets between the two projectors result in a loss of detail and bad readability of textual information. We propose addressing the problem by overlaying a third projector, so that its image is visible to both eyes. We eliminate offset artifacts by extracting 2D contents from the scene and rendering it using this dedicated “2D projector”. In addition, we locally increase resolution by focusing the 2D projector onto a smaller region. This allows us to reduce the size of overlaid 2D annotations, thereby reducing interference with the 3D scene. In our paper, we describe the
design of our display system called five. Following, we present two detailed user studies that compare five with an overview-and-detail and a pan-and-zoom interface.
BibTeX:
@inproceedings{Steffen2009,
  author = {Steffen, Daniel and Ebert, Achim and Deller, Matthias and Dannenmann, Peter},
  title = {five: Enhancing 3D Wall Displays with a 2D High-Resolution Overlay},
  booktitle = {Proceedings of the 12th IFIP TC 13 International Conference on Human-Computer Interaction: Part II},
  publisher = {Springer-Verlag},
  year = {2009},
  pages = {173--186},
  url = {http://dx.doi.org/10.1007/978-3-642-03658-3_24},
  doi = {10.1007/978-3-642-03658-3_24}
}

2008

Deller, M., Ebert, A., Agne, S. and Steffen, D. (2008), Guiding Attention in Information-rich Virtual Environments, In IASTED International Conference on Visualization, Imaging and Image Processing. IASTED International (VIIP-08), The Eighth IASTED International Conference on Visualization, Imaging and Image Processing, September 1-3, Palma de Mallorca, Spain., 9, 2008. , pp. 310-315. ACTA Press.
Abstract: When presenting complex, multidimensional data to users, the emphasis of relevant information plays an important role. Especially when data is arranged according to sev eral criteria, the simultaneous use of multiple visualization metaphors frequently results in information overload and unintuitive visualizations. In this paper, we present results of an evaluation of preattentive visual features for high lighting relevance of data in an information-rich virtual en vironment. Representations of electronic documents with differing degrees of relevance were presented to users using different visual cues, which were evaluated with regard to their effectiveness, effciency and comprehensibility. Also, they were tested in respect of their scalability to more documents, and effects of different screen sizes.
BibTeX:
@inproceedings{Deller2008,
  author = {Matthias Deller and Achim Ebert and Stefan Agne and Daniel Steffen},
  editor = {J.J. Villanueva},
  title = {Guiding Attention in Information-rich Virtual Environments},
  booktitle = {IASTED International Conference on Visualization, Imaging and Image Processing. IASTED International (VIIP-08), The Eighth IASTED International Conference on Visualization, Imaging and Image Processing, September 1-3, Palma de Mallorca, Spain},
  publisher = {ACTA Press},
  year = {2008},
  pages = {310-315}
}
Deller, M., Dannenmann, P., Ebert, A., Reis, G. and Steffen, D. (2008), Stereoscopic 3D Views with In-Place 2D Overlays for a Medical Tutoring System, In Proceedings of IEEE Conference on Visualization 2008. IEEE Visualization 2008 (IEEEVis-2008), October 19-24, Columbus,, OH, United States. IEEE.
Abstract: Three-dimensional visualization of the human body is a widely used technique in medical education. It is even more effective when using immersive stereoscopic visualization. However, a realistic image of the body and its parts alone is not sufficient for a tutoring system since the scholar needs additional information about what he is seeing. Besides simple names of the organs also detailed information on their functioning as well as additional diagrams may be needed. On the other hand, in a stereo environment, it is difficult to display that kind of detailed information, enforcing additional 2D views of the focussed body part. In the presented system we tackle this problem by enhancing the stereoscopic view with in-place 2D overlays. The stereoscopic projection is extended by a third projector, which is capable of providing a high-resolution picture inside the 3D projection. With this new technique, we extend medical visualization technologies by adding relevant detailed information in the focus plane, thus creating a new and most valuable tutoring system which enables students to learn self-reliantly and in a very efficient manner.
BibTeX:
@inproceedings{Deller2008a,
  author = {Matthias Deller and Peter Dannenmann and Achim Ebert and Gerd Reis and Daniel Steffen},
  title = {Stereoscopic 3D Views with In-Place 2D Overlays for a Medical Tutoring System},
  booktitle = {Proceedings of IEEE Conference on Visualization 2008. IEEE Visualization 2008 (IEEEVis-2008), October 19-24, Columbus,, OH, United States},
  publisher = {IEEE},
  year = {2008},
  note = {Short Paper (Poster Session)}
}
Ebert, A., Dannenmann, P., Deller, M., Steffen, D. and Gershon, N. (2008), A large 2d+3d focus+context screen, In Proceedings of the 26th Conference on Human Factors in Computing Systems. 26th Conference on Human Factors in Computing Systems (CHI-2008), April 5-10, Florence, Italy. , pp. 2691-2696. ACM Press.
Abstract: Today, the amount of unstructured, multidimensional information is becoming more and more complex and overwhelming. One promising approach to face these problems is the efficient use of large displays. Their immersive effect is even stronger when using a stereoscopic representation of information. However, the technical limitations of such 3D projective systems result in a loss of detail and a bad readability of textual information. We present a novel approach which enhances a 3D projective system by providing an additional high resolution 2D focus area.
BibTeX:
@inproceedings{Ebert2008,
  author = {Achim Ebert and Peter Dannenmann and Matthias Deller and Daniel Steffen and Nahum Gershon},
  title = {A large 2d+3d focus+context screen},
  booktitle = {Proceedings of the 26th Conference on Human Factors in Computing Systems. 26th Conference on Human Factors in Computing Systems (CHI-2008), April 5-10, Florence, Italy},
  publisher = {ACM Press},
  year = {2008},
  pages = {2691-2696},
  note = {ISBN:978-1-60558-012-X}
}
Ebert, A., Hagen, H., Bierz, T., Deller, M., Olech, P.-S., Steffen, D. and Thelen, S. (2008), SEE MORE: Improving the Usage of Large Display Environments. Dagstuhl Seminare/Workshops, Workshop on Virtual Reality, Dagstuhl, Germany o.A..
Abstract: Truly seamless tiled displays and stereoscopic large high-resolution displays are among the top research challenges in the area of large displays. In this paper we approach both topics by adding an additional projector to a tiled display scenario as well as to a stereoscopic environment. In both cases, we have developed new focus + context screen approaches: a multiple foci plus context metaphor in the tiled display setup and a 2D+3D focus+context metaphor in the stereoscopic scenario.
BibTeX:
@inproceedings{Ebert2008a,
  author = {Achim Ebert and Hans Hagen and Torsten Bierz and Matthias Deller and Peter-Scott Olech and Daniel Steffen and Sebastian Thelen},
  title = {SEE MORE: Improving the Usage of Large Display Environments. Dagstuhl Seminare/Workshops, Workshop on Virtual Reality, Dagstuhl, Germany},
  publisher = {o.A.},
  year = {2008}
}