Publications (Doreen Böhnstedt)
back

[RSM+19-1] Tobias Rückelt, Ioannis Stavrakakis, Tobias Meuser, Imane Horiya Brahmi, Doreen Böhnstedt, Ralf Steinmetz:
Data transmission plan adaptation complementing strategic time-network selection for connected vehicles. In: Ad Hoc Networks, p. 146-154, January 2019, ISSN 1570-8705.
[MLA+19-1] Tobias Meuser, Patrick Lieser, The An Binh Nguyen, Doreen Böhnstedt, Ralf Steinmetz:
Lifetime-Aware Information Aggregation under Uncertainty for Advanced Driver Assistance Systems. In: Ad Hoc Networks, p. 56-67, January 2019, ISSN 1570-8705.
[LAN+18]
PDF		 Patrick Lieser, Alaa Alhamoud, Hosam Nima, Björn Richerzhagen, Sanja Huhle, Doreen Böhnstedt, Ralf Steinmetz:
Situation Detection based on Activity Recognition in Disaster Scenarios. In: ISCRAM 2018 Conference Proceedings – 15th International Conference on Information Systems for Crisis Response and Management, p. 737-753, May 2018, ISBN 978-0-692-12760-5.
[JGM+17-1] Florian Jomrich, Markus Grau, Tobias Meuser, The An Binh Nguyen, Doreen Böhnstedt, Ralf Steinmetz:
ICCOMQS - Intelligent measuring framework to ensure reliable communication for highly automated vehicles. In: Proceedings of 2017 IEEE Vehicular Networking Conference (VNC), p. 311-318, IEEE, November 2017, ISBN 978-1-5386-0985-9.
[LAG+17]
PDF		 Patrick Lieser, Flor Alvarez, Paul Gardner-Stephen, Matthias Hollick, Doreen Böhnstedt:
Architecture for Responsive Emergency Communication Networks. In: Proc. 7th IEEE Global Humanitarian Technology Conference (GHTC) , p. 1-10, IEEE, October 2017, ISBN 978-1-5090-6046-7.
[LRF+17-2]
PDF		 Patrick Lieser, Nils Richerzhagen, Tim Feuerbach, The An Binh Nguyen, Björn Richerzhagen, Doreen Böhnstedt, Ralf Steinmetz:
Decentralized Resource Allocation in Mobile Networks. In: Demonstrations of the 42nd IEEE Conference on Local Computer Networks (LCN Demonstrations), p. 1-3, IEEE, October 2017.
[LRF+17-1]
PDF		 Patrick Lieser, Nils Richerzhagen, Tim Feuerbach, Leonhard Nobach, Doreen Böhnstedt, Ralf Steinmetz:
Take it or Leave it: Decentralized Resource Allocation in Mobile Networks. In: Proc. 42st IEEE Conference on Local Computer Networks (LCN) , p. 1-8, IEEE, October 2017, ISBN 978-1-5090-6522-6.
[AAM+17-1]
PDF		 The An Binh Nguyen, Pratyush Agnihotri, Christian Meurisch, Manisha Luthra, Rahul Dwarakanath, Jeremias Blendin, Doreen Böhnstedt, Michael Zink, Ralf Steinmetz:
Efficient Crowd Sensing Task Distribution Through Context-aware NDN-based Geocast. In: 42nd Conference on Local Computer Networks (LCN), p. 52-60, October 2017, ISBN 978-1-5090-6523-3.
[JSR+17-1] Florian Jomrich, Aakash Sharma, Tobias Rückelt, Doreen Böhnstedt, Ralf Steinmetz:
Intelligent Ooading Distribution of High De nition Street Maps for Highly Automated Vehicles. In: Smart Cities, Green Technologies, and Intelligent Transport Systems 6th International Conference, SMARTGREENS 2017, and Third International Conference, VEHITS 2017, Porto, Portugal, April 22-24, 2017, Revised Selected Papers, Springer, August 2017, ISBN 978-3-030-02906-7.
[AABR17-2] Wael Alkhatib, Alaa Alhamoud, Doreen Böhnstedt, Ralf Steinmetz:
Hybrid Model for Large Scale Forecasting of Power Consumption. In: International Work-Conference on Artificial Neural Networks, p. 661--672, Springer, Cham, June 2017, ISBN online:978-3-319-59153-7, print: 978-3-319-59152-0.
[AABR17-1] Wael Alkhatib, Alaa Alhamoud, Doreen Böhnstedt, Ralf Steinmetz:
Hybrid Models for Short-Term Load Forecasting Using Clustering and Time Series. In: International Work-Conference on Artificial Neural Networks, p. 104--115, Springer, Cham, June 2017, ISBN Online: 978-3-319-59147-6, Print: 978-3-319-59146-9.
[RSM+17-1]
PDF		 Tobias Rückelt, Ioannis Stavrakakis, Tobias Meuser, Doreen Böhnstedt, Ralf Steinmetz:
Data Transmission Plan Adaptation for Connected Vehicles. In: Proceedings of the 1st International Balkan Conference on Communications and Networking, May 2017, ISBN 978-3-901882-94-4.
[MLA+17-1]
PDF		 Tobias Meuser, Patrick Lieser, The An Binh Nguyen, Doreen Böhnstedt, Ralf Steinmetz:
Adaptive Information Aggregation for Application-specific Demands. In: Proceedings of the 1st International Balkan Conference on Communications and Networking, May 2017.
[JSRB17-1] Florian Jomrich, Aakash Sharma, Tobias Rückelt, Daniel Burgstahler and Doreen Böhnstedt:
Dynamic Map Update Protocol for Highly Automated Driving Vehicles. In: Proceedings of the 3rd International Conference on Vehicle Technology and Intelligent Transport Systems (VEHITS 2017), 3rd, p. 68-78, SCITEPRESS – Science and Technology Publications, Lda., April 2017, ISBN 978-989-758-242-4.
[JRBS17-1] Florian Jomrich, Tobias Rückelt, Doreen Böhnstedt, Ralf Steinmetz:
An Efficient Heat-Map-Based Wireless Communication Simulation Model for Omnet++. In: Proceedings of the AmE 2017 - Automotive meets Electronics, 87, p. 65-70, VDE Verlag GmbH, March 2017, ISBN 978-3-8007-4369-8 .
[NED+17-1]
PDF		 Svenja Neitzel, Frank Englert, Rahul Dwarakanath, Katharina Schneider, Kathrin Reinke, Gisela Gerlach, Christoph Rensing, Doreen Böhnstedt, Ruth Stock-Homburg:
Towards Using Situational Information to Detect an Individual's Perceived Stress Level. In: Pervasive Computing and Communication Workshops (PerCom Workshops), 2017 IEEE International Conference on, p. 333-338, IEEE, March 2017, ISBN 978-1-5090-4338-5.
[JWR+16-1] Florian Jomrich, Tushar Wankhede, Tobias Rückelt, Daniel Burgsthaler, Doreen Böhnstedt, Ralf Steinmetz:
Demo: Rapid Cellular Network Simulation Framework for Automotive Scenarios (RACE Framework). In: Proceedings of: International Conference on Networked Systems (NetSys 2017), p. 1-2, IEEE, March 2017, ISBN 978-1-5090-4395-8.
[BMB17-1]
PDF		 Daniel Burgstahler, Martin Möbus, Tobias Meuser, Doreen Böhnstedt and Ralf Steinmetz:
A Categorization Scheme for Information Demands of Future Connected ADAS. In: Proceedings of the AmE 2017 - Automotive meets Electronics, p. 32-37, VDE Verlag, March 2017, ISBN 978-3-8007-4369-8.
[MBRB16-1]
PDF		 Tobias Meuser, Daniel Burgstahler, Tobias Rückelt, Doreen Böhnstedt and Ralf Steinmetz:
Hybrid-ProbSense.KOM: Probabilistic Sensing with Hybrid Communication for Gathering Vehicular Sensed Data. In: Proceedings of the AmE 2017 - Automotive meets Electronics, p. 121-126, VDE Verlag, March 2017, ISBN 978-3-8007-4369-8.
[AMBS16-1]
PDF		 Alaa Alhamoud, Vaidehi Muradi, Doreen Böhnstedt, Ralf Steinmetz:
Activity Recognition in Multi-User Environments Using Techniques of Multi-label Classification. In: Proceedings of the 6th International Conference on the Internet of Things, p. 15-23, ACM, November 2016, ISBN 978-1-4503-4814-0.
[RAB+16-1]
PDF		 Tobias Rückelt, Halis Altug, Daniel Burgstahler, Doreen Böhnstedt, Ralf Steinmetz:
MoVeNet: Mobility Management for Vehicular Networking. In: Proceedings of the 14th ACM International Symposium on Mobility Management and Wireless Access (MobiWAC 16), p. 139-146, ACM, November 2016, ISBN 978-1-4503-4503-3.
[RBJ+16-1]
PDF		 Tobias Rückelt, Daniel Burgstahler, Florian Jomrich, Doreen Böhnstedt, Ralf Steinmetz:
Impact of Time in Network Selection for Mobile Nodes. In: In Proceedings of the 19th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems (MSWiM 16), p. 68-77, ACM, November 2016, ISBN 978-1-4503-4502-6.
[BMLB16-1]
PDF		 Daniel Burgstahler, Tobias Meuser, Ulrich Lampe, Doreen Böhnstedt and Ralf Steinmetz:
ProbSense.KOM: A Probabilistic Sensing Approach for Gathering Vehicular Sensed Data. In: IEEE 5th International Conference on Mobile Services (MS 2016), p. 9-16, IEEE Computer Society, June 2016, ISBN 978-1-5090-2625-8.
[SEB+16-2] Katharina Schneider, Frank Englert, Doreen Böhnstedt, Gisela Bieling, Rahul Dwarakanath, Ralf Steinmetz, Ruth Stock-Homburg:
Why are you Stressed? Analyzing Methods for Mobile Stress Management. In: Digital Working Life, April 2016.
[BXB16-1]
PDF		 Daniel Burgstahler, Athiona Xhoga, Christoph Peusens, Martin Möbus, Doreen Böhnstedt and Ralf Steinmetz:
RemoteHorizon.KOM: Dynamic Cloud-based eHorizon. In: Proceedings of the AmE 2016 - Automotive meets Electronics, VDE VERLAG GMBH, March 2016, ISBN 978-3-8007-4167-0.
[ELR+16-1] Frank Englert, Patrick Lieser, Marius Rettberg-Päplow, Alaa Alhamoud, Doreen Böhnstedt, Ralf Steinmetz:
LightMon: Apportioning the Effect of Light Switching Events on the Electricity Consumption of Buildings. In: EWSN '16 Proceedings of the 2016 International Conference on Embedded Wireless Systems and Networks, p. 77-88, February 2016, ISBN 978-0-9949886-0-7 .
[RJB+15-1] Tobias Rückelt, Florian Jomrich, Daniel Burgstahler, Doreen Böhnstedt, Ralf Steinmetz:
Publish-Subscribe-Based Control Mechanism for Scheduling Integration in Mobile IPv6. In: In: Proceedings of the 40th IEEE Conference on Local Computer Networks (LCN), p. 478 - 481, IEEE, October 2015, ISBN 978-1-4673-6771-4.
[AXE+15-1]
PDF		 Alaa Alhamoud, Pei Xu, Frank Englert, Philipp Scholl, The An Binh Nguyen, Doreen Böhnstedt, Ralf Steinmetz:
Evaluation of User Feedback in Smart Home for Situational Context Identification. In: Proceedings of the 2015 IEEE International Conference on Pervasive Computing and Communication Workshops (PerCom Workshops), p. 20-25, IEEE Computer Society Conference Publishing Services, March 2015, ISBN 978-1-4799-8425-1.
[AEF+15-1]
PDF		 The An Binh Nguyen, Frank Englert, Simon Farr, Christian Gottron, Doreen Böhnstedt, Ralf Steinmetz:
Hybrid Communication Architecture for Emergency Response - An Implementation in Firefighter’s Use Case. In: Proceedings of the fifth International Workshop on Pervasive Networks for Emergency Management (PerNEM), p. 528-533, IEEE Computer Society Conference Publishing Services, March 2015, ISBN 978-1-4799-8424-4.
[ERK+15-1]
PDF		 Frank Englert, Marius Rettberg-Päplow, Sebastian Kössler, Alaa Alhamoud, The An Binh Nguyen, Doreen Böhnstedt, Ralf Steinmetz:
Enhancing User Privacy by Data Driven Selection Mechanisms for Finding Transmission-Relevant Data Samples in Energy Recommender Systems. In: Workshop on Middleware for a Smarter Use of Electric Energy (MidSEE 2015), IEEE, March 2015.
[AXR+15-1]
PDF		 Alaa Alhamoud, Pei Xu, Andreas Reinhardt, Frank Englert, Philipp Scholl, Doreen Böhnstedt, Ralf Steinmetz:
Extracting Human Behavior Patterns from Appliance-level Power Consumption Data. In: Wireless Sensor Networks - 12th European Conference, {EWSN} 2015, Porto, Portugal, February 9-11, 2015. Proceedings, p. 52--67, Springer - Lecture Notes in Computer Science, February 2015, ISBN 978-3-319-15581-4.
[AAG+14-1]
PDF		 Alaa Alhamoud, Arun Asokan Nairy, Christian Gottron, Doreen Böhnstedt, Ralf Steinmetz:
Presence Detection, Identification and Tracking in Smart Homes Utilizing Bluetooth Enabled Smartphones. In: Proceedings of the14th IEEE International Workshop on Wireless Local Networks (IEEE WLN 2014), p. 784-789, EDAS Conference Services, September 2014, ISBN 978-1-4799-3784-4.
[AKA+14-1]
PDF		 Alaa Alhamoud, Michael Kreger, Haitham Afifi, Christian Gottron, Daniel Burgstahler, Frank Englert, Doreen Böhnstedt, Ralf Steinmetz:
Empirical Investigation of the Effect of the Door’s State on Received Signal Strength in Indoor Environments At 2.4 GHz. In: Proceedings of the 10th IEEE International Workshop on Performance and Management of Wireless and Mobile Networks (IEEE P2MNET 2014) , p. 652-657, IEEE Xplore, September 2014, ISBN 978-1-4799-3784-4.
[ARR+14-1]
PDF		 Alaa Alhamoud, Felix Ruettiger, Andreas Reinhardt, Frank Englert, Daniel Burgstahler, Doreen Böhnstedt, Christian Gottron, Ralf Steinmetz:
SMARTENERGY.KOM: An Intelligent System for Energy Saving in Smart Home. In: Proceedings of the 3rd IEEE LCN International Workshop on GlObal Trends in SMART Cities (IEEE goSMART 2014), p. 685-692, IEEE Xplore, September 2014, ISBN 978-1-4799-3784-4.
[ABB+13-1]
PDF		 Alaa Alhamoud, Sonja Bergsträßer, Daniel Burgstahler, Doreen Böhnstedt, Frank Englert, Andreas Reinhardt, Johannes Schmitt, Ralf Steinmetz:
CPaaS: Context Processing as a Service. March 2013.
[BBB+13-1]
PDF		 Daniel Burgstahler, Sonja Bergsträßer, Doreen Böhnstedt, Andreas Reinhardt, Alaa Alhamoud, Frank Englert, Johannes Schmitt, Ralf Steinmetz:
CPaaS: Context Processing as a Service. In: PIK - Praxis der Informationsverarbeitung und Kommunikation, p. 47, February 2013, ISSN 1865-8342.
[Böh12-1]
PDF		 Doreen Böhnstedt, Christoph Rensing:
Anregung der Kooperation zwischen Lernenden mittels eines Feeds von Aktionen in einer Lerncommunity. In: DeLFI 2012, 207, p. 15--26, Köllen Verlag, September 2012, ISBN 978-3-88579-601-5.
[RB12-1]
PDF		 Christoph Rensing, Doreen Böhnstedt:
Informelles, Ressourcen-basiertes Lernen. In: i-com, 1, p. 15-18, May 2012, ISSN 1618-162X.
[Böh11-10]
PDF		 Doreen Böhnstedt and Christoph Rensing and Ralf Steinmetz:
Supporting Resource-based Learning with Knowledge Networks and Scaffolds. In: IATEL - Interdisciplinary Approaches to Technology-enhanced Learning, p. 95--110, Waxmann, November 2011, ISBN 978-3-8309-2481-4.
[Sch11-4]
PDF		 Philipp Scholl, Doreen Böhnstedt, Christoph Rensing, Ralf Steinmetz:
Adaptivity and Adaptability in Personal and Community Knowledge Networks. In: IATEL - Interdisciplinary Approaches to Technology-enhanced Learning, p. 261--270, Waxmann, November 2011, ISBN 978-3-8309-2481-4.
[RBB11-1]
PDF		 Christoph Rensing, Doreen Böhnstedt, Claudia Baumer:
Kollaborativer, bedarfsorientierter Wissenserwerb mittels Web-Ressourcen: Prozessmodell, semantische Technologien und eine Communityplattform. In: Unternehmenswissen als Erfolgsfaktor mobilisieren - KnowTech 2011, p. 241-250, Gito mbH, September 2011, ISBN 9783942183451.
[BLRS11-1]
PDF		 Doreen Böhnstedt, Lasse Lehmann, Christoph Rensing, Ralf Steinmetz:
Automatic Identification of Tag Types in a Resource- Based Learning Scenario. In: Towards Ubiquitious Learning, Proceedings of the 6th European Conference on Technology Enhanced Learning, EC-TEL 2011, LNCS 6964, p. 57-70, Springer, September 2011, ISBN 9783642239847.
[BCR11-1]
PDF		 Doreen Böhnstedt, Chris Chard, Christoph Rensing:
Interaktive Visualisierung von Wissensressourcen einer Lerncommunity und Modellierung eines Ressourcenpfads. In: DeLFI 2011 - Die 9. e-Learning Fachtagung Informatik, p. 67-78, Köllen Verlag, September 2011, ISBN 9783885792826.
[ABR11-1]
PDF		 Mojisola Anjorin, Doreen Böhnstedt, Christoph Rensing:
Towards Graph-Based Recommendations for Resource-Based Learning using Semantic Tag Types. In: DeLFI 2011: Die 9. e-Learning Fachtagung Informatik - Poster Workshops Kurzbeiträge, TUD press, September 2011, ISBN 9783942710367.
[Böh11-1]
PDF		 Doreen Böhnstedt:
Semantisches Tagging zur Verwaltung von webbasierten Lernressourcen: Modelle, Methoden und eine Plattform zur Unterstützung Ressourcen-basierten Lernens. June 2011.
[SBD+10-1]
PDF		 Philipp Scholl, Doreen Böhnstedt, Renato Domínguez García, Christoph Rensing, Ralf Steinmetz:
Extended Explicit Semantic Analysis for Calculating Semantic Relatedness of Web Resources. In: Sustaining TEL: From Innovation to Learning and Practice Proceedings of EC-TEL 2010, p. 324--339, Springer Verlag, September 2010, ISBN 978-3-642-16019-6.
[BSRS10-1]
PDF		 Doreen Böhnstedt, Philipp Scholl, Christoph Rensing, Ralf Steinmetz:
Enhancing an Environment for Knowledge Acquisition based on Web Resources by Automatic Tag Type Identification. In: Proceedings of International Conference on Computer-aided Learning 2010 (ICL 2010), p. 380--389, kassel university press, September 2010, ISBN 978-3-89958-541-4.
[RSBS10-1]
PDF		 Christoph Rensing, Philipp Scholl, Doreen Böhnstedt, Ralf Steinmetz:
Recommending and Finding Multimedia Resources in Knowledge Acquisition Based on Web Resources. In: Proceedings of 19th International Conference on Computer Communications and Networks, p. 1-6, IEEE eXpress Conference Publishing, August 2010, ISBN 9781424471140.
[SBB+09-1]
PDF		 Philipp Scholl, Bastian F. Benz, Doreen Böhnstedt, Christoph Rensing, Bernhard Schmitz, Ralf Steinmetz:
Implementation and Evaluation of a Tool for Setting Goals in Self-Regulated Learning with Web Resources. In: Learning in the Synergy of Multiple Disciplines, EC-TEL 2009, p. 521-534, Springer-Verlag Berlin Heidelberg, October 2009, ISBN 978-3-642-04635-3.
[SBD+09-1]
PDF		 Philipp Scholl, Doreen Böhnstedt, Renato Domínguez García, Christoph Rensing, Ralf Steinmetz:
Anwendungen und Nutzen der Automatischen Erkennung von Web-Genres in persönlichen und Community- Wissensnetzen. In: Lernen im digitalen Zeitalter - Workshop-Band - Dokumentation der Pre-Conference zur DeLFI 2009, p. 37-44, Logos, September 2009, ISBN 9783832522735.
[DBS+09-2]
PDF		 Renato Domínguez García, Doreen Böhnstedt, Philipp Scholl, Christoph Rensing, Ralf Steinmetz:
Von Tags zu semantischen Netzen - Einsatz im Ressourcen-basierten Lernen. In: Lernen im digitalen Zeitalter - Workshop-Band - Dokumentation der Pre-Conference zur DeLFI 2009, p. 29-36, Logos, September 2009, ISBN 9783832522735.
[BSRS09-1]
PDF		 Doreen Böhnstedt, Philipp Scholl, Christoph Rensing, Ralf Steinmetz:
Modeling Personal Knowledge Networks to Support Resource Based Learning. In: Proceedings of 9th International Conference on Knowledge Management and Knowledge Technologies (I-KNOW'09), p. 309-316, Verlag der Technischen Universität Graz, Austria, Universiti Malaysia Sarawak, Malaysia, and Know-Center, Austria, September 2009, ISBN 978-3-85125-060-2.
[RB09-1]
PDF		 Christoph Rensing, Doreen Böhnstedt:
Bildung einer Community zur Vermittlung von E-Learning-Erfahrungen auf Basis semantischer Netze. In: Lernen im digitalen Zeitalter - Proceedings der 7. e-Learning Fachtagung Informatik der Gesellschaft für Informatik, Berlin 2009, 153, p. 187-198, GI Verlag, September 2009, ISBN 9783885792475.
[DBS+09-1]
PDF		 Renato Domínguez García, Alexandru Berlea, Philipp Scholl, Doreen Böhnstedt, Christoph Rensing, Ralf Steinmetz:
Improving Topic Exploration in the Blogosphere by Detecting Relevant Segments. In: Proceedings of the I-Know 2009, p. 177-188, Verlag der Technischen Universität Graz, September 2009, ISBN 978-3-851-25-060-2.
[BSR+09-1]
PDF		 Doreen Böhnstedt, Philipp Scholl, Christoph Rensing, Ralf Steinmetz:
Collaborative Semantic Tagging of Web Resources on the Basis of Individual Knowledge Networks. In: Proceedings of First and Seventeenth International Conference on User Modeling, Adaptation, and Personalization UMAP 2009, Vol. 5535, p. 379-384, Springer-Verlag Berlin Heidelberg 2009, June 2009, ISBN 978-3-642-02246-3.
[SDB+09-2]
PDF		 Philipp Scholl, Renato Domínguez García, Doreen Böhnstedt, Christoph Rensing, Ralf Steinmetz:
Towards Language–Independent Web Genre Detection. In: WWW '09: Proceedings of the 18th international conference on World wide web, p. 1157--1158, April 2009, ISBN 978-1-60558-487-4.
[DSB+08-1]
PDF		 Renato Dominguez Garcia, Philipp Scholl, Doreen Böhnstedt, Christoph Rensing, Ralf Steinmetz:
Towards To an Automatic Web Genre Classification. In: TR-2008-10, November 2008.
[SBB+08-1] Philipp Scholl, Bastian Benz, Doreen Böhnstedt, Christoph Rensing, Ralf Steinmetz, Bernhard Schmitz:
Einsatz und Evaluation eines Zielmanagement-Werkzeugs bei der selbstregulierten Internet-Recherche. In: DeLFI 2008: 6. e-Learning Fachtagung Informatik, P-132, p. 125--136, Lecture Notes in Informatics (LNI), September 2008, ISBN 978-3-88579-226-0.
[BSRS08-1]
PDF		 Doreen Böhnstedt, Philipp Scholl, Christoph Rensing, Ralf Steinmetz:
ELWMS.KOM - Typisiertes Tagging in persönlichen Wissensnetzen. In: Workshop Proceedings der Tagungen Mensch & Computer 2008, DeLFI 2008 und Cognitive Design 2008, p. 330--331, Logos Verlag, September 2008, ISBN 978-3-8325-2007-6.
[BSB+08-1]
PDF		 Doreen Böhnstedt, Philipp Scholl, Bastian Benz, Christoph Rensing, Ralf Steinmetz, Bernhard Schmitz:
Einsatz persönlicher Wissensnetze im Ressourcen-basierten Lernen. In: DeLFI 2008: 6. e-Learning Fachtagung Informatik, P-132, p. 113--124, Lecture Notes in Informatics (LNI), September 2008, ISBN 978-3-88579-226-0.