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Ohlsson, Kjell
Publications (10 of 28) Show all publications
Alm, T., Alfredson, J. & Ohlsson, K. (2007). Business process reengineering in the automotive area by simulator-based design (1ed.). In: Asim Abdel Rahman El Sheikh, Abid Al Ajeeli, Evon M. O. Abu-Taieh (Ed.), Simulation and Modeling: Current Technologies and Applications (pp. 337-358). Hershey, PA, USA: IGI-Global Inc.
Open this publication in new window or tab >>Business process reengineering in the automotive area by simulator-based design
2007 (English)In: Simulation and Modeling: Current Technologies and Applications / [ed] Asim Abdel Rahman El Sheikh, Abid Al Ajeeli, Evon M. O. Abu-Taieh, Hershey, PA, USA: IGI-Global Inc. , 2007, 1, p. 337-358Chapter in book (Other academic)
Abstract [en]

The science of simulation and modeling (SM) strives to showcase the highest possible level of reality in order to determine the conditions necessary for optimal performance. SM is a multifaceted and complex field due to the numerous applications involved, particularly since SM applications range from nuclear reaction to supermarket queuing. Simulation and Modeling: Current Technologies and Applications includes examinations of current issues related to simulation such as: Web-based simulation, virtual reality, augmented reality, and artificial intelligence. This book combines different methods, views, theories, and applications of simulations into one volume, and offers insight into the computer science aspect of simulation and modeling while integrating the business practices of SM.

Place, publisher, year, edition, pages
Hershey, PA, USA: IGI-Global Inc., 2007 Edition: 1
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-12756 (URN)978-15-9904-198-8 (ISBN)159-90-4198-7 (ISBN)
Available from: 2007-11-09 Created: 2007-11-09 Last updated: 2013-06-28Bibliographically approved
Alm, T., Kovordányi, R. & Ohlsson, K. (2006). Continuous versus Situation-dependent Night Vision Presentation in Automotive Applications. Paper presented at Human Factors and Ergonomics Society 50th Annual Meeting. Human Factors and Ergonomics Society
Open this publication in new window or tab >>Continuous versus Situation-dependent Night Vision Presentation in Automotive Applications
2006 (English)Conference paper, Published paper (Refereed)
Abstract [en]

As the number of advanced driver assistance systems in modern cars increases the question of possible negative behavioral adaptation is raised. We have investigated this phenomenon for night vision systems in a driving simulator. One common opinion is that there is a risk for using the enhanced visual conditions that come with these systems to increase speed during nighttime driving and thereby eliminate the safety margins the system was designed to provide. In our study two system approaches were compared, one with continuous presentation and one with presentation only when dangerous objects were detected by the system. The latter approach was meant to minimize the risk of negative adaptation, which was partly confirmed in the study. Moreover, the results showed better and more consistent driver performance with the situation-dependent system and all subjects preferred this approach from a workload perspective.

Place, publisher, year, edition, pages
Human Factors and Ergonomics Society, 2006
Series
Human Factors and Ergonomics Society Annual Meeting Proceedings, ISSN 1071-1813 ; 50
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-14325 (URN)
Conference
Human Factors and Ergonomics Society 50th Annual Meeting
Available from: 2007-03-02 Created: 2007-03-02 Last updated: 2014-11-28
Kovordanyi, R., Alm, T. & Ohlsson, K. (2006). Night-vision display unlit during uneventful periods may improve traffic safety. In: 2006 Intelligent Vehicles Symposium sponsored by the IEEE Intelligent Transportation Systems Society,2006: . Paper presented at IEEE Intelligent Vehicles Symposium 2006, June 13-15, 2006, Tokyo, Japan (pp. 282-287). IEEE conference proceedings
Open this publication in new window or tab >>Night-vision display unlit during uneventful periods may improve traffic safety
2006 (English)In: 2006 Intelligent Vehicles Symposium sponsored by the IEEE Intelligent Transportation Systems Society,2006, IEEE conference proceedings, 2006, p. 282-287Conference paper, Published paper (Refereed)
Abstract [en]

It is always uncertain if a new assistance system enhances traffic safety or not: empirical studies indicate that driving style may deteriorate when the driver experiences the increased safety margin created by an advanced driver assistance system. To minimize this negative effect on driving style, we redesigned a night vision system so that it appeared differently to the driver: we let the system's head-up display be turned off during operation, to be lit up only when the system detected an obstacle (e.g., a pedestrian or animal) on the road ahead. This presentation style was compared in a simulator study to the traditional solution of constantly lit-up display. The results indicate that drivers reacted more reliably (showed less variance in reaction times) using the new system, which implies that the lighting up of the IR-display constituted an effective warning. Also, drivers to a greater extent drove at normal (slower) speeds when using the re-designed system. More generally, systems offering discontinuous support (i.e. only in critical situations) may have less of a negative effect on driving style, as their presence is not felt as vividly by the driver

Place, publisher, year, edition, pages
IEEE conference proceedings, 2006
Keywords
advanced driver assistance systems, discontinuous support, driving style, negative behavioral adaptation, night vision systems, re-design
National Category
Computer Sciences
Identifiers
urn:nbn:se:liu:diva-35867 (URN)10.1109/IVS.2006.1689642 (DOI)28885 (Local ID)4-901122-86-X (ISBN)28885 (Archive number)28885 (OAI)
Conference
IEEE Intelligent Vehicles Symposium 2006, June 13-15, 2006, Tokyo, Japan
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2018-01-13Bibliographically approved
Kovordanyi, R., Ohlsson, K. & Alm, T. (2005). Dynamically Deployed Support as a Potential Solution to Negative Behavioral Adaptation. In: 2005 IEEE Intelligent Vehicles Symposium Proceedings, 2005: . Paper presented at IEEE Intelligent Vehicles Symposium Proceedings, 2005 (pp. 613-618). IEEE conference proceedings
Open this publication in new window or tab >>Dynamically Deployed Support as a Potential Solution to Negative Behavioral Adaptation
2005 (English)In: 2005 IEEE Intelligent Vehicles Symposium Proceedings, 2005, IEEE conference proceedings, 2005, p. 613-618Conference paper, Published paper (Refereed)
Abstract [en]

Advanced driver assistance systems are designed to make driving easier that is, to alleviate the driver's workload, and to increase traffic safety. However, traffic safety is affected by negative behavioral adaptation, meaning that drivers tend to increase speed and pay less attention to driving when supported by an advanced assistance system. We relate behavioral adaptation to reinforcement learning at a subconscious level, and propose that driver assistance is dynamically varied within predetermined safety limits. The aim of employing a dynamic assistance policy is to prevent the driver from noticing a constant improvement in vehicle handling. We conclude by describing ongoing work for empirically evaluating an improved lane departure warning system that uses a dynamic assistance policy.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2005
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-31903 (URN)10.1109/IVS.2005.1505171 (DOI)17736 (Local ID)0-7803-8961-1 (ISBN)17736 (Archive number)17736 (OAI)
Conference
IEEE Intelligent Vehicles Symposium Proceedings, 2005
Note

LITH-IKP-CR--05/1267--SE

Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2014-11-28Bibliographically approved
Alm, T., Ohlsson, K. & Kovordanyi, R. (2005). Glass Cockpit Simulators - Tools for IT-based Car Systems Design and Evaluation. In: . Paper presented at Driving Simulator Conference - North America (pp. 192). Orlando, Fl, USA: CATSS/UCF
Open this publication in new window or tab >>Glass Cockpit Simulators - Tools for IT-based Car Systems Design and Evaluation
2005 (English)Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Orlando, Fl, USA: CATSS/UCF, 2005
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-31380 (URN)LiTH-IKP-CR-1237 (ISRN)17148 (Local ID)17148 (Archive number)17148 (OAI)
Conference
Driving Simulator Conference - North America
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2014-11-28
Ohlsson, K., Hans, P. & Östlin, O. (2005). The Bollnäs Model for Testing, Evaluation and Design of Information and Communication Technology Services. In: Online Deliberation 2005 / DIAC-2005,2005.
Open this publication in new window or tab >>The Bollnäs Model for Testing, Evaluation and Design of Information and Communication Technology Services
2005 (English)In: Online Deliberation 2005 / DIAC-2005,2005, 2005Conference paper, Published paper (Refereed)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-31904 (URN)17737 (Local ID)17737 (Archive number)17737 (OAI)
Note
LiTH-IKP-CR--05/1268--SEAvailable from: 2009-10-09 Created: 2009-10-09
Dekker, S., Ohlsson, K., Hollnagel, E. & Alm, H. (2003). Humans in a complex environment II: Automation, IT and operator work.
Open this publication in new window or tab >>Humans in a complex environment II: Automation, IT and operator work
2003 (English)Book (Other academic)
Publisher
p. 322
National Category
Computer Sciences
Identifiers
urn:nbn:se:liu:diva-30869 (URN)16530 (Local ID)91-7373-596-5 (ISBN)978-9-1737-3596-4 (ISBN)16530 (Archive number)16530 (OAI)
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2018-01-13Bibliographically approved
Johansson, K. & Ohlsson, K. (2003). Variationer av riskmeddelanden. Linköping: Tema Teknik och social förändring, Linköpings universitet
Open this publication in new window or tab >>Variationer av riskmeddelanden
2003 (Swedish)Report (Other academic)
Place, publisher, year, edition, pages
Linköping: Tema Teknik och social förändring, Linköpings universitet, 2003
Series
Tema T Arbetsnotat ; 271
National Category
Social Sciences Interdisciplinary
Identifiers
urn:nbn:se:liu:diva-33675 (URN)19712 (Local ID)19712 (Archive number)19712 (OAI)
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2018-01-13
Piamonte, D., Abeysekera, J. & Ohlsson, K. (2001). Understanding small graphical symbols: A cross-cultural study. International Journal of Industrial Ergonomics, 27(6), 399-404
Open this publication in new window or tab >>Understanding small graphical symbols: A cross-cultural study
2001 (English)In: International Journal of Industrial Ergonomics, ISSN 0169-8141, E-ISSN 1872-8219, Vol. 27, no 6, p. 399-404Article in journal (Refereed) Published
Abstract [en]

Graphical symbols such as icons or pictograms as interfaces in modern technological devices have become quite common. Although generally designed in western countries, their use can be found worldwide from audio-visual appliances to computers and computer-related devices. A basic ergonomic principle is to involve the potential users in the design and evaluation stages especially when the user groups are quite diverse. This study was part of an international project on evaluating telecommunication symbols. One of the major objectives was to test different graphical symbols (of the videophone), designed, and tested in Western Europe using subject groups from Asia, Europe, and the United States. This paper would discuss the major portions of the tests involving US and Swedish subjects. Performance indices used were hits, certainties, confusions, and semantic differential ratings. They were useful in analysing how the symbols were recognised, confused, and perceived by different subject groups. They also helped detect differences between groups which otherwise seemed to have similar test results. The results showed differences in patterns of ratings, which may be culturally linked and could help determine aspects of symbol design and usage that may be more helpful in designing instructions, learning aids, etc. Awareness of such subject bias and their implications are important on how one interprets the test results.Relevance to industryThe study outcome can be very helpful for industries in designing and evaluating candidate graphical symbols across various types of consumer products for worldwide use. Copyright © 2001 Elsevier Science B.V.

Keywords
Cross-cultural studies, Evaluation, Graphical symbols, Icons, Pictograms, Semantic differential testing
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-47369 (URN)10.1016/S0169-8141(01)00007-5 (DOI)
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-13
Alfredson, J. & Ohlsson, K. (2000). Pilots’ understanding of situational awareness. In: Proceedings of the 10th European Conference on Cognitive Ergonomics: . Paper presented at 10th European Conference on Cognitive Ergonomics, Linköping, Sweden, 21-23 August 2000 (pp. 172-181).
Open this publication in new window or tab >>Pilots’ understanding of situational awareness
2000 (English)In: Proceedings of the 10th European Conference on Cognitive Ergonomics, 2000, p. 172-181Conference paper, Published paper (Refereed)
National Category
Social Sciences
Identifiers
urn:nbn:se:liu:diva-12752 (URN)
Conference
10th European Conference on Cognitive Ergonomics, Linköping, Sweden, 21-23 August 2000
Available from: 2007-11-09 Created: 2007-11-09 Last updated: 2015-03-02Bibliographically approved
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