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  • 1.
    Blomkvist, Johan
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering. Oslo School of Architecture and Design.
    Persson, Johan
    Linköping University, Department of Management and Engineering, Machine Design. Linköping University, The Institute of Technology.
    Åberg, Johan
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Communication through Boundary Objects in Distributed Agile Teams2015Conference paper (Refereed)
    Abstract [en]

    Personal communication between User-Centered Design (UCD) specialists and developers is important for communicating user needs and design solutions in agile development. In distributed projects where opportunities for personal communication are limited, the design documentation is an important surrogate. This study has investigated the perceived effectiveness of boundary objects in a distributed agile team, and their role in communicating target user needs. Six in-depth interviews with UCD specialists showed that the boundary objects rarely communicate underlying needs of the users but rather focus on interaction with the system that is being developed. The used boundary objects also do not work as stand-alone deliverables; they need to be explained and elaborated. Making the boundary objects comprehensive enough to be stand-alone is seen as too time consuming and not worth the effort. For agile projects with distributed teams, this creates hand-over and follow-up problems.

  • 2.
    Blomkvist, Johan
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences.
    Åberg, Johan
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Holmlid, Stefan
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Formative Evaluation of IT-based Services: A Case Study of a Meal Planning Service2014In: Interacting with computers, ISSN 0953-5438, E-ISSN 1873-7951, Vol. 26, no 6, p. 540-556Article in journal (Refereed)
    Abstract [en]

    To evaluate and develop a service supported by an IT (information technology) system the intentionto use the future service should be in focus. The technology acceptance model (TAM) and the theoryof planned behaviour (TPB) can both provide knowledge about users’ intention to use a service,making them good models to base formative decisions on. Unlike TAM, TPB is concerned withspecific information related to the service context, and provide knowledge about what makes ITuseable.We used an adapted version of the TPB as the foundation for a formative service evaluationtechnique called F-SET.We applied the F-SET to a case where two subsequent versions of a serviceprototype were evaluated. The first prototype was a description of the service supported by Hi-Fidesign sketches showing what a web-based meal planning tool could look like. The second prototypeconsisted of both service processes and the web-based meal planning tool.To find relevant factors thatinfluence future use of such a service, a survey of 28 informants was conducted with the first prototype.The second prototype involved five families who used the service for two weeks.The feedback providedby the families, based on the factors identified in the pre-test, influenced the future direction of theservice development. Feedback from the informants was distributed between the service and the ITsystem, and the most common factors that influence the intention to use the service were time, price,usefulness and availability. Feedback included both positive and negative comments, as well as bugsand suggestions for improvements.We discuss potential improvements and what kind of informationto expect from the different constructs of the TPB.

  • 3.
    Blomkvist, Johan
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Åberg, Johan
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Holmlid, Stefan
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Service Walkthroughs to Support Service Development2012In: ServDes.2012 Conference Proceedings Co-Creating Services; The 3rd Service Design and Service Innovation Conference, Espoo, Finland, 2012, p. 43-52Conference paper (Refereed)
    Abstract [en]

    Service design is said to be a holistic design approach. This is evident in most service design literature and textbooks but still services are prototyped by focusing on separate parts rather than whole service journeys. In this paper we propose a technique called service walkthrough that can be used to represent whole services. We explore what information can be generated using the technique and how useful it is. We found that the technique helped identify the flow of information, problematic areas, and design opportunities. The prototype was generally well received by the participants. In addition to earning about information, the technique also revealed insights about time and interdependencies of the various parts of the service. Some remarks are also made about when the service walkthrough can be used in the service development process and considerations concerning the fidelity of service walkthroughs.

  • 4.
    Ivanova, Valentina
    et al.
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    Lambrix, Patrick
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    Åberg, Johan
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Requirements for and Evaluation of User Support for Large-Scale Ontology Alignment2015In: The Semantic Web. Latest Advances and New Domains: 12th European Semantic Web Conference, ESWC 2015, Portoroz, Slovenia, May 31 -- June 4, 2015. Proceedings, Springer Science+Business Media B.V., 2015, p. 3-20Conference paper (Refereed)
    Abstract [en]

    Currently one of the challenges for the ontology alignment community is the user involvement in the alignment process. At the same time, the focus of the community has shifted towards large-scale matching which introduces an additional dimension to this issue. This paper aims to provide a set of requirements that foster the user involvement for large-scale ontology alignment tasks.Further, we present and discuss the results of a literature study for 7 ontology alignments systems as well as a heuristic evaluation and an observational user study for 3 ontology alignment systems to reveal the coverage of the requirements in the systems and the support for the requirements in the user interfaces.

  • 5.
    Kindborg, Mikael
    et al.
    Linköping University, Department of Computer and Information Science, MDI - Interaction and Service Design Research Group. Linköping University, The Institute of Technology.
    Åberg, Johan
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    A lightweight agent framework for interactive multi-agent applications1999In: Proceedings of Fourth International Conference on the Practical Application of Intelligent Agents and Multi-Agents, 1999, 1, p. 123-142Conference paper (Refereed)
    Abstract [en]

    Usability issues are traditionally associated with user interfaces rather than with agent frameworks. We argue that the metaphors and models used in a framework will affect the thinking of the developer, and will influence the application design. Therefore, usability is of central importance for successful software development, and for reducing development and maintenance costs. We discuss the design and implementation of a lightweight agent framework for interactive multi-agent applications. A lightweight framework is advantageous for distributed interactive applications, for instance applications running on hand-held devices with limited memory. The design is based on minimalism and simplicity. We present the results from a usability study of the framework, where issues such as learnability and attitude have been evaluated. The study shows that minimalist design principles are useful for achieving understandable and navigable frameworks.

  • 6.
    Lambrix, Patrick
    et al.
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Åberg, Johan
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Towards Creating a Knowledge Base for World-Wide Web Documents1997In: Proceedings of the IASTED International Conference on Intelligent Information Systems, IEEE, 1997, 1, p. 507-511Conference paper (Refereed)
    Abstract [en]

    The lack of organization of the information on the web results in non-efficient information retrieval. Several approaches for improvement have been suggested. We propose to use a document knowledge base that contains semantic and structural information concerning the retrievable documents that is extracted from the actual documents. We show that using such a knowledge base gives a number of advantages among which advanced query functionality. We also discuss the creation of such a knowledge base and in particular we show how we can automatically extract structural information from HTML documents for addition to the document base.

  • 7.
    Maciuszek, Dennis
    et al.
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Åberg, Johan
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Dependability requirements to aid the design of virtual companions for later life2004In: Proceedings of the First 'HEAT: The Home and Electronic Assistive Technology Workshop' / [ed] G. Baxter and G. Dewbury, Lancaster, UK: Lancaster University Computing Department , 2004, p. 51-60Conference paper (Refereed)
    Abstract [en]

    Frail older people can normally not be given round-the-clock care-giving assistance. During the time there is no other person around they must be independent. Electronic assistive technology (EAT) can increase an older person's independence in everyday life, but to do so it must be dependable. This paper examines issues of dependability for a special class of EAT software, virtual companions for later life. A virtual companion is a personal system of interconnected functions aiming to assist an elderly user by imitating elder-caregiver interaction. In order to provide designers with an aid for defining, designing, and validating virtual companions, the first part of the paper identifies and discusses the special dependability requirements to be put on such software. The second part describes our own approach, and gives suggestions on how to design for dependability.

  • 8.
    Maciuszek, Dennis
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Shahmehri, Nahid
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Åberg, Johan
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    User involvement in the design of software to assist people with dementia: Creating a personalised virtual kitchen companion2004In: ENABLE Final Conference,2004, 2004, p. 23-23Conference paper (Other academic)
  • 9.
    Maciuszek, Dennis
    et al.
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Åberg, Johan
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Evaluation and refinement of a design framework for generating dependable virtual companions for later life2005In: From Smart Homes to Smart Care. ICOST 2005, Amsterdam: IOS Press , 2005, p. 50-64Conference paper (Refereed)
    Abstract [en]

    Resources in care for frail older people are limited. Electronic assistive technology can help maintain and improve older people's quality of life, however high requirements need to be put on such systems. As part of an iterative design process, this paper evaluates a framework for the design of interactive, multifunctional, and personalised assistive technology - virtual companions - in relation to previously defined dependability requirements. By means of scenario-based testing of a prototype implementation, we refine the first version of the design framework. The paper concludes with a reflection on our method, and outlines the iteration steps to follow.

  • 10.
    Maciuszek, Dennis
    et al.
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Åberg, Johan
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    What help do older people need? Constructing a functional design space of electronic assistive technology applications2005In: Assets '05 Proceedings of the 7th international ACM SIGACCESS conference on Computers and accessibility, New York: ACM , 2005, p. 4-11Conference paper (Refereed)
    Abstract [en]

    In times of ageing populations and shrinking care resources, electronic assistive technology (EAT) has the potential of contributing to guaranteeing frail older people a continued high quality of life. This paper provides users and designers of EAT with an instrument for choosing and producing relevant and useful EAT applications in the form of a functional design space. We present the field study that led to the design space, and give advice on using the tool.

  • 11.
    Shahmehri, Nahid
    et al.
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    Chisalita, Ioan
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, Database and information techniques.
    Åberg, Johan
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, Database and information techniques.
    People with Special Needs and Traffic Safety2008In: The Engineering Handbook of Smart Technology for Aging, Disability and Independence / [ed] Abdelsalam (Sumi) Helal, Mounir Mokhtari, Bessam Abdulrazak, USA: Wiley , 2008, 1, p. -944Chapter in book (Other academic)
    Abstract [en]

    An advanced look at smart technology to promote the independence of the elderly and disabled

    Ongoing research and advancements in technology are essential for the continuing independence of elderly and disabled persons. The Engineering Handbook of Smart Technology for Aging, Disability, and Independenceprovides a thorough analysis of these technologies and the needs of the elderly and disabled, including a breakdown of demographics, government spending, growth rate, and much more.

    Each chapter is written by an expert in his or her respective field, and gives readers unparalleled insight into the research and developments in a multitude of important areas, including:

    • User-need analyses, classifications, and policies
    • Assistive devices and systems for people with motor disabilities
    • Assistive devices and systems for people with visual and hearing impairments
    • Human-machine interaction and virtual reality
    • Assistive robotics
    • Technology for user mobility and object manipulation
    • Smart homes as assistant environments
    • A discussion of emerging standards and guidelines to build accessible devices, tools, and environments

    This book is an indispensable resource for researchers and professionals in computer science, rehabilitation science, and clinical engineering. It also serves as a valuable textbook for graduate students in the aforementioned fields.

  • 12.
    Shahmehri, Nahid
    et al.
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Chisalita, Ioan
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Åberg, Johan
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Maciuszek, Dennis
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Hellqvist, Marie
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Using Vehicular Communication to Support Older Drivers at Road Intersections: A Feasibility Study2004In: Proceedings of the 2nd International Conference on Smart homes and health Telematics, Amsterdam, The Netherlands: IOS Press , 2004, p. 33-40Conference paper (Refereed)
    Abstract [en]

    More and more people are living to old age, and it is usually a desire among elderly people to sustain mobility. Unfortunately, the crash rate of older adults is much higher than for other drivers. Older drivers are also more likely to sustain serious injuries that lead to disability or death. Therefore, technological contributions for improving traffic safetyand preserving mobility of older people are important. One promising new approach is to use traffic safety systems based on vehicular communication, where vehicles exchange warning messages. This paper evaluates the feasibility of using such vehicular communication for supporting older drivers in road intersections, which is the most common accident setting for older drivers. Using a temporal reasoning system (ECAM) this accident setting is analysed in depth, and the potential foraccident avoidance is quantified, while taking into account several relevant factors such as speed, driver reaction time, and transmission delay for warning messages. The results indicate the high potential of vehicular communication, and highlight requirements on transmission delay.

  • 13.
    Shahmehri, Nahid
    et al.
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Åberg, Johan
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Lambrix, Patrick
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Projects as a means for subject learning and personal development under student responsibility2000In: Proceedings of the Second International Conference on Problem-based Learning in Higher Education, 2000, 1, p. 66-Conference paper (Refereed)
    Abstract [en]

    n/a

  • 14.
    Shahmehri, Nahid
    et al.
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    Åberg, Johan
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, Database and information techniques.
    Maciuszek, Dennis
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, Database and information techniques.
    Virtual Companions2008In: The Engineering Handbook of Smart Technology for Aging, Disability and Independence / [ed] Abdelsalam (Sumi) Helal, Mounir Mokhtari, Bessam Abdulrazak., USA: Wiley , 2008, 1, p. -944Chapter in book (Other academic)
    Abstract [en]

    An advanced look at smart technology to promote the independence of the elderly and disabled

    Ongoing research and advancements in technology are essential for the continuing independence of elderly and disabled persons. The Engineering Handbook of Smart Technology for Aging, Disability, and Independenceprovides a thorough analysis of these technologies and the needs of the elderly and disabled, including a breakdown of demographics, government spending, growth rate, and much more.

    Each chapter is written by an expert in his or her respective field, and gives readers unparalleled insight into the research and developments in a multitude of important areas, including:

    • User-need analyses, classifications, and policies
    • Assistive devices and systems for people with motor disabilities
    • Assistive devices and systems for people with visual and hearing impairments
    • Human-machine interaction and virtual reality
    • Assistive robotics
    • Technology for user mobility and object manipulation
    • Smart homes as assistant environments
    • A discussion of emerging standards and guidelines to build accessible devices, tools, and environments

    This book is an indispensable resource for researchers and professionals in computer science, rehabilitation science, and clinical engineering. It also serves as a valuable textbook for graduate students in the aforementioned fields.

  • 15.
    Shahmehri, Nahid
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Åberg, Johan
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Maciuszek, Dennis
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Chisalita, Ioan
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Linköping University's Virtual Companion project2004In: IEEE pervasive computing, ISSN 1536-1268, E-ISSN 1558-2590, Vol. 3, no 2, p. 50-50Article in journal (Other academic)
  • 16.
    Tan, He
    et al.
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    Jakoniené, Vaida
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    Lambrix, Patrick
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    Åberg, Johan
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    Alignment of Biomedical Ontologies using Life Science Literature2006In: KDLL: International Workshop on Knowledge Discovery in Life Science LIterature Knowledge Discovery in Life Science Literature PAKDD 2006 International Workshop, KDLL 2006, Singapore, April 9, 2006. Proceedings / [ed] Eric G. Bremer, Jörg Hakenberg, Eui-Hong (Sam) Han, Daniel Berrar and Werner Dubitzky, Berlin/Heidelberg: Springer, 2006, p. 1-17Conference paper (Refereed)
    Abstract [en]

    This book constitutes the refereed proceedings of the International Workshop on Knowledge Discovery in Life Science Literature, KDLL 2006, held in Singapore in conjunction with the 10th Pacific-Asia Conference on Knowledge Discovery and Data Mining (PAKDD 2006).

    The 12 revised full papers presented together with two invited talks were carefully reviewed and selected for inclusion in the book. The papers cover all topics of knowledge discovery in life science data such as text mining, identification and retrieval of documents, passage retrieval, co-reference resolution, extraction of life science entities or relationships from large collections, automated characterization of biological, biomedical and biotechnological entities and processes, extraction and characterization of more complex patterns and interaction networks, automated generation of text summaries, automated construction, expansion and curation of ontologies for different domains, and construction of controlled vocabularies.

  • 17.
    Åberg, Cecile
    et al.
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    Åberg, Johan
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    Lambrix, Patrick
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    A Platform to Evaluate the Technology for Service Discovery in the Semantic Web2006In: National Conference on Artificial Intelligence AAAI-06,2006, 2006, p. 1253-1258Conference paper (Refereed)
    Abstract [en]

    Since the description of the Semantic Web paradigm in 2001, technology has been proposed to allow its deployment and use. However, there is not yet any large and widely deployed set of semantically annotated Web resources available. As a result, it is not possible to evaluate the use of the technology in a real environment, and several assumptions about how the Semantic Web should work are emerging. In order to further investigate these assumptions and the related technology, we propose a simulation and evaluation platform. The platform provides tools to create SemanticWeb simulations using different technologies for different purposes, and to evaluate their performance. In this paper we introduce the model of the platform and describe the current implementation. The implementation facilitates the integration of technology for an essential operation on the Semantic Web, namely Semantic Web service discovery. We illustrate the use of the platform in a case study by implementing a SemanticWeb where the Jade multi-agent platform provides the framework to describe the agents, and a number of existing Semantic Web technologies are embedded in agent behavior.

  • 18.
    Åberg, Johan
    Linköping University, Department of Computer and Information Science, MDALAB - Human Computer Interfaces. Linköping University, The Institute of Technology.
    An evaluation of a meal planning system: ease of use and perceived usefulness2009In: Proceedings of the 2009 British Computer Society Conference on Human-Computer Interaction / [ed] Alan F. Blackwell, British Computer Society (BCS), 2009, p. 278-287Conference paper (Refereed)
    Abstract [en]

    Unhealthy eating is an increasingly important problem in the western society. Our approach to this problem is to provide a meal planning system giving recommendations of suitable food recipes, taking important factors such as nutrient content, cost, variation, etc into account. A user controls how the system takes these factors into account through settings after which the system creates an optimal meal plan. The user can then iteratively refine the settings until a satisfactory meal plan is produced. The system is evaluated empirically in terms of ease of use and perceived usefulness, factors crucial for eventual user acceptance. The results are positive, and several interesting possibilities for future system improvements are discussed.

  • 19.
    Åberg, Johan
    Linköping University, Department of Computer and Information Science, MDALAB - Human Computer Interfaces. Linköping University, The Institute of Technology.
    Challenges with Teaching HCI Early to Computer Students2010In: Proceedings of the fifteenth annual conference on Innovation and technology in computer science education / [ed] Reyyan Ayfer, John Impagliazzo,Cary Laxer, New York, NY, USA: ACM , 2010, p. 3-7Conference paper (Refereed)
    Abstract [en]

    The introductory course on human-computer interaction (HCI) and usable systems, taught early for the computer science and computer engineering education programs, has suffered from bad course evaluations. To investigate the students' beliefs and values in relation to the subject matter and the course, focus groups were used. The results indicate challenges with a lack of maturity and motivation among the students and that they wrongly perceive the subject matter as trivial. An approach for dealing with the challenges in the form of a course re-design is presented and implemented. The evaluation of the new course showed that it worked well and was greatly appreciated.

  • 20.
    Åberg, Johan
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Dealing with Malnutrition: A Meal Planning System for Elderly2006In: AAAI Spring Symposium on Argumentation for Consumers of Health Care,2006, Menlo Park, CA, USA: AAAI Press , 2006Conference paper (Refereed)
    Abstract [en]

    Malnutrition is a serious problem among people of old age. To overcome malnutrition, a change of food consumption behaviour is necessary, which needs to be based on specialist advice from health-care professionals. Changing food-related behaviour, however, is known to be difficult. Our approach to this problem is to provide an intelligent meal planning system to be used by the elderly person in his or her home. The system provides recommendations of suitable food recipes, taking into account the advice of the care givers (e.g. in terms of dietary restrictions, suitable energy and fat levels, etc). We describe the requirements, design, algorithms, and user interface of the system, and discuss ongoing and future work.

  • 21.
    Åberg, Johan
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Live help systems: an approach to intelligent help for Web information systems2002Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Since the creation of the World-Wide Web we have seen a great growth in the complexity of Web sites. There has also been a large expansion in number of Web sites and in amount of usage. As a consequence, more and more Web site users are having problems accomplishing their tasks, and it is increasingly important to provide them with support.

    Our research approach to online help for Web site users is the introduction and study of what we call live help systems. A live help system is an intelligent help system which integrates human experts in the process of advice giving by allowing users to communicate with dedicated expert assistants through the help system. Traditional fully automatic intelligent help systems have several common problems. For example, there are problems with large system complexity, knowledge engineering bottlenecks, and credibility. We hypothesise that live help systems, offer a solution to these problems.

    Our aim with this thesis is to explore the design, technical feasibility, and usability of live help systems, in order to provide a foundation on which future research and practise can build. We have systematically explored the design space of live help systems. We have implemented and successfully deployed a live help system at an existing Web site, thereby demonstrating technical feasibility. During the deployment period, data was collected from the users and the human experts. Our analysis shows that live help systems are greatly appreciated by Web users, and that they are indeed effective in helping users accomplish their tasks. We also provide empirical results regarding the effectiveness of employing automatic help functions as a filter for the human experts. Further, the concept of user modelling as an aid for human experts has been explored as part of the field study. 

    List of papers
    1. The role of human Web assistants in e-commerce: an analysis and a usability study
    Open this publication in new window or tab >>The role of human Web assistants in e-commerce: an analysis and a usability study
    2000 (English)In: Internet Research, ISSN 1066-2243, Vol. 10, no 2, p. 114-125Article in journal (Refereed) Published
    Abstract [en]

    Electronic commerce has recently shown enormous potential to take over a significant share of the sales market. There is a need to provide services that can reach individual computer users with different information profiles and levels of expertise. In this article the concept of Web assistants, human assistants working in an electronic Web shop, is presented. This human-computer collaboration provides intelligent and adaptive services via an integrated communication media. A prototype of a Web assistant system has been implemented. While browsing through the system the user can call for human assistance should the need arise. Presents the results of a usability study performed on the prototype system. Recent commercial moves in the direction discussed in this article increase the importance of the usability study. The results are encouraging, especially when it comes to the attitude aspects of usability. The subjects were extremely enthusiastic about the concept of Web assistants and its implications. The human Web assistant who participated in the field trial highlighted the importance of user modelling. Although the system is mainly in the context of electronic commerce, it can be used in many other contexts. These include home automation, digital libraries, and technical support, to name a few.

    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-47538 (URN)10.1108/10662240010322902 (DOI)
    Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-13
    2. A design space analysis of live help systems
    Open this publication in new window or tab >>A design space analysis of live help systems
    (English)Manuscript (preprint) (Other academic)
    Abstract [en]

    This paper presents a design space analysis of live help systems. Several important design components are identified. Alternative design options are considered and assessed theoretically against suitable criteria. The assessments are mainly based on a survey of a large number of research papers. We illustrate how the design space analysis can be of value in the design of live help systems in four different kinds of application domains (i.e. electronic banks, digital libraries, web shops, and home health care systems). We describe a design exercise where we compared a design resulting from the design space analysis with the real design of an example system. The comparison showed that the design space analysis leads to reasonable designs, but that special characteristics of the application at hand may require adaptations of the design space analysis. A description of the implementation of the example system is provided. The theoretical design space analysis is then complemented by a summary of the lessons learned from deployment of the example system. We also point out future directions for further extending the scope of this design space analysis. The paper is intended for practitioners and researchers doing work on online help for Web information systems.

    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-86687 (URN)
    Note

    This manuscript will not be published.

    Available from: 2012-12-21 Created: 2012-12-21 Last updated: 2017-01-17
    3. An empirical study of human Web assistants: implications for user support in Web information systems
    Open this publication in new window or tab >>An empirical study of human Web assistants: implications for user support in Web information systems
    2001 (English)In: Proceedings of the CHI Conference on Human Factors in Computing Systems, New York, USA: ACM Press , 2001, 1, p. 404-411Conference paper, Published paper (Refereed)
    Abstract [en]

    User support is an important element in reaching the goal of universal usability for Web information systems. Recent developments indicate that human involvement in user support is a step towards this goal. However, most such efforts are currently being pursued on a purely intuitive basis. This, empirical findings about the role of human assistants are important. In this paper we present the findings from a field study of a general user support model for Web information systems. We show that integrating human assistance into Web systems is a way to provide efficient user support. Further, this integration makes a Web site more fun to use and increases the user's trust in the site. The support also improves the site atmosphere. Our findings are summarised as recommendations and design guidelines for decision-makers and developers Web systems.

    Place, publisher, year, edition, pages
    New York, USA: ACM Press, 2001 Edition: 1
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-54752 (URN)10.1145/365024.365305 (DOI)1-58113-327-8 (ISBN)
    Conference
    CHI Conference on Human Factors in Computing Systems, March 31-April 5, Seattle, Washington, USA
    Available from: 2010-04-08 Created: 2010-04-08 Last updated: 2015-04-22
    4. Collection and exploitation of expert knowledge in Web assistant system
    Open this publication in new window or tab >>Collection and exploitation of expert knowledge in Web assistant system
    2001 (English)In: Proceedings of the 34th Hawaii International Conference on System Sciences, IEEE , 2001, 1, p. 201-203Conference paper, Published paper (Refereed)
    Abstract [en]

    Recent research and commercial developments have highlighted the importance of human involvement in user support for Web information systems. In our earlier work a Web assistant system was introduced, which is a hybrid support system with human Web assistants and computer based support (J. Aberg and N. Shahmehri, 2000). An important issue with Web assistant systems is how to make optimal use of these support resources. We use a knowledge management approach with frequently asked questions for a question answering system that acts as a question filter for the human assistants. Knowledge is continuously collected from the assistants and exploited to augment the question answering capabilities. Our system has been deployed and evaluated by an analysis of conversation logs and questionnaires for users and assistants. The results show that our approach is feasible and useful. Lessons learned are summarised in a set of recommendations.

    Place, publisher, year, edition, pages
    IEEE, 2001 Edition: 1
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-54753 (URN)10.1109/HICSS.2001.927089 (DOI)0-7695-0981-9 (ISBN)
    Conference
    The 34th Hawaii International Conference on System Sciences, 6 January 2001, Maui, Hawaii, USA
    Available from: 2010-04-08 Created: 2010-04-08 Last updated: 2015-06-16
    5. User modelling for live help systems
    Open this publication in new window or tab >>User modelling for live help systems
    2001 (English)In: Proceedings of the Second International Workshop on Electronic Commerce (Welcom'01) / [ed] G. Goos, J. Hartmanis, and J. van Leeuwen, Heidelberg: Springer Verlag , 2001, 1, p. 164-179Conference paper, Published paper (Refereed)
    Abstract [en]

    We have explored the role of user modelling in live help systems for e-commerce web sites. There are several potential benefits with user modelling in this context: 1) Human assistants can use the personal information in the user models to provide the users with efficient support tailored to their personal needs; 2) Assistants can be more comfortable in their supporting role; 3) Consultation resources can be saved, and thus, financial savings can be made for the e-commerce company. A user modelling approachh as been implemented and deployed in a real web environment as part of a live help system. Following the deployment we have analysed consultation dialogue logs and answers to a questionnaire for participating assistants. This paper elaborates on these results, which show that assistants consider user modelling to be helpful and that consultation dialogues can be an important source for user model data collection. Based on lessons learned from the study, future directions for researchand development are carefully analysed and laid out.

    Originally we used the term web assistant system. However, similar system have recently begun to appear on e-commerce sites, commonly referred to as live help systems. To avoid future confusion we now refer to our work using this newly adopted terminology.

    Place, publisher, year, edition, pages
    Heidelberg: Springer Verlag, 2001 Edition: 1
    Series
    Lecture Notes in Computer Science, ISSN 0302-9743, E-ISSN 1611-3349
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-54748 (URN)10.1007/3-540-45598-1_16 (DOI)978-3-540-42878-7 (ISBN)
    Conference
    Second International Workshop on Electronic Commerce (Welcom'01), Heidelberg, Germany, November 16-17
    Available from: 2010-04-08 Created: 2010-04-08 Last updated: 2018-01-30
  • 22.
    Åberg, Johan
    et al.
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    A design space analysis of live help systemsManuscript (preprint) (Other academic)
    Abstract [en]

    This paper presents a design space analysis of live help systems. Several important design components are identified. Alternative design options are considered and assessed theoretically against suitable criteria. The assessments are mainly based on a survey of a large number of research papers. We illustrate how the design space analysis can be of value in the design of live help systems in four different kinds of application domains (i.e. electronic banks, digital libraries, web shops, and home health care systems). We describe a design exercise where we compared a design resulting from the design space analysis with the real design of an example system. The comparison showed that the design space analysis leads to reasonable designs, but that special characteristics of the application at hand may require adaptations of the design space analysis. A description of the implementation of the example system is provided. The theoretical design space analysis is then complemented by a summary of the lessons learned from deployment of the example system. We also point out future directions for further extending the scope of this design space analysis. The paper is intended for practitioners and researchers doing work on online help for Web information systems.

  • 23.
    Åberg, Johan
    et al.
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    An empirical study of human Web assistants: implications for user support in Web information systems2001In: Proceedings of the CHI Conference on Human Factors in Computing Systems, New York, USA: ACM Press , 2001, 1, p. 404-411Conference paper (Refereed)
    Abstract [en]

    User support is an important element in reaching the goal of universal usability for Web information systems. Recent developments indicate that human involvement in user support is a step towards this goal. However, most such efforts are currently being pursued on a purely intuitive basis. This, empirical findings about the role of human assistants are important. In this paper we present the findings from a field study of a general user support model for Web information systems. We show that integrating human assistance into Web systems is a way to provide efficient user support. Further, this integration makes a Web site more fun to use and increases the user's trust in the site. The support also improves the site atmosphere. Our findings are summarised as recommendations and design guidelines for decision-makers and developers Web systems.

  • 24.
    Åberg, Johan
    et al.
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Collection and exploitation of expert knowledge in Web assistant system2001In: Proceedings of the 34th Hawaii International Conference on System Sciences, IEEE , 2001, 1, p. 201-203Conference paper (Refereed)
    Abstract [en]

    Recent research and commercial developments have highlighted the importance of human involvement in user support for Web information systems. In our earlier work a Web assistant system was introduced, which is a hybrid support system with human Web assistants and computer based support (J. Aberg and N. Shahmehri, 2000). An important issue with Web assistant systems is how to make optimal use of these support resources. We use a knowledge management approach with frequently asked questions for a question answering system that acts as a question filter for the human assistants. Knowledge is continuously collected from the assistants and exploited to augment the question answering capabilities. Our system has been deployed and evaluated by an analysis of conversation logs and questionnaires for users and assistants. The results show that our approach is feasible and useful. Lessons learned are summarised in a set of recommendations.

  • 25.
    Åberg, Johan
    et al.
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Live Help Systems2003In: Human Factors and Web Development / [ed] Julie Ratner, Taylor & Francis , 2003, 2, p. -342Chapter in book (Other academic)
    Abstract [en]

    Due to the ever-changing technological landscape and the global integration of the Internet in schools, libraries, homes, and businesses, the content of this second edition changed significantly. Since many computer users are connected at both home and work, the Web has transformed communication; consumption patterns; and access to business, politicians, and neighbors halfway around the world. With numerous books on user-friendly Web sites, the editor's challenge was to deliver a volume with a radically different snapshot of the research being conducted at the beginning of the 21st century. The chapters in this book provide many answers to critical questions and propose thought-provoking research ideas for the future. Corporate and academic practitioners, as well as their doctoral fellows and graduate students from around the globe contributed their time, expertise, and unique research practices. Together, they collectively provide another comprehensive resource that the growing community of human factors and Web development experts can share. The editor's hope is that this book will inspire leading-edge research on accessible Web applications or other topics in the coming years.

  • 26.
    Åberg, Johan
    et al.
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Live Help Systems2003In: Human Factors and Web Development / [ed] Julie Ratne, Taylor & Francis , 2003, 2, p. 287-309Chapter in book (Other academic)
    Abstract [en]

    Due to the ever-changing technological landscape and the global integration of the Internet in schools, libraries, homes, and businesses, the content of this second edition changed significantly. Since many computer users are connected at both home and work, the Web has transformed communication; consumption patterns; and access to business, politicians, and neighbors halfway around the world. With numerous books on user-friendly Web sites, the editor's challenge was to deliver a volume with a radically different snapshot of the research being conducted at the beginning of the 21st century. The chapters in this book provide many answers to critical questions and propose thought-provoking research ideas for the future. Corporate and academic practitioners, as well as their doctoral fellows and graduate students from around the globe contributed their time, expertise, and unique research practices. Together, they collectively provide another comprehensive resource that the growing community of human factors and Web development experts can share. The editor's hope is that this book will inspire leading-edge research on accessible Web applications or other topics in the coming years.

  • 27.
    Åberg, Johan
    et al.
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    The role of human Web assistants in e-commerce: an analysis and a usability study2000In: Internet Research, ISSN 1066-2243, Vol. 10, no 2, p. 114-125Article in journal (Refereed)
    Abstract [en]

    Electronic commerce has recently shown enormous potential to take over a significant share of the sales market. There is a need to provide services that can reach individual computer users with different information profiles and levels of expertise. In this article the concept of Web assistants, human assistants working in an electronic Web shop, is presented. This human-computer collaboration provides intelligent and adaptive services via an integrated communication media. A prototype of a Web assistant system has been implemented. While browsing through the system the user can call for human assistance should the need arise. Presents the results of a usability study performed on the prototype system. Recent commercial moves in the direction discussed in this article increase the importance of the usability study. The results are encouraging, especially when it comes to the attitude aspects of usability. The subjects were extremely enthusiastic about the concept of Web assistants and its implications. The human Web assistant who participated in the field trial highlighted the importance of user modelling. Although the system is mainly in the context of electronic commerce, it can be used in many other contexts. These include home automation, digital libraries, and technical support, to name a few.

  • 28.
    Åberg, Johan
    et al.
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    User modelling as an aid for human web assistants2001In: User Modeling 2001: 8th International Conference, UM 2001 Sonthofen, Germany, July 13–17, 2001 Proceedings / [ed] Mathias Bauer, Piotr J. Gmytrasiewicz and Julita Vassileva, Berlin/Heidelberg: Springer, 2001, Vol. 2109, p. 201-203Chapter in book (Refereed)
    Abstract [en]

    This paper explores how user modelling can work as an aid for human assistants in a user support system for web sites. Information about the user can facilitate for the assistant the tailoring of the consultation to the individual needs of the user. Such information can be represented and structured in a user model made available for the assistant. A user modelling approach has been implemented and deployed in a real web environment as part of a user support system, Following the deployment we have analysed consultation dialogue logs and answers to a questionnaire for participating assistants. The initial results show that assistants consider user modelling to be helpful and that consultation dialogues can be an important source for user Model data collection.

  • 29.
    Åberg, Johan
    et al.
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    User Modelling as an Aid for Human Web Assistants2001In: Proceedings of the 8th International Conference on User Modeling / [ed] G. Goos, J. Hartmanis and J. van Leeuwen, Springer Verlag , 2001, 1, p. 201-203Conference paper (Refereed)
    Abstract [en]

    This paper explores how user modelling can work as an aid for human assistants in a user support system for web sites. Information about the user can facilitate for the assistant the tailoring of the consultation to the individual needs of the user. Such information can be represented and structured in a user model made available for the assistant. A user modelling approach has been implemented and deployed in a real web environment as part of a user support system. Following the deployment we have analysed consultation dialogue logs and answers to a questionnaire for participating assistants. The initial results show that assistants consider user modelling to be helpful and that consultation dialogues can be an important source for user model data collection.

  • 30.
    Åberg, Johan
    et al.
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Web Assistants: Towards an Intelligent and Personal Web Shop1999In: The Second Workshop on Adaptive Systems and User Modeling on the World Wide Web, 1999, 1, p. 5-12Conference paper (Refereed)
    Abstract [en]

    Electronic commerce has recently shown enormous potential to take over the sales market. There is a need to provide services that can reach individual computer users with different information profiles and levels of expertise. In this paper we introduce the novel concept of web assistants, human assistants working in an electronic web shop. This human-computer cooperation provides intelligent and personal services via an integrated communication media. A prototype of a web assistant system has been implemented. While browsing through the system the user can call for human assistance should the need arise. We present the results of a usability study performed on our prototype system. The results are encouraging especially when it comes to the attitude aspects of usability. The subjects were extremely enthusiastic about the concept of web assistants and its implications.

  • 31.
    Åberg, Johan
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Shahmehri, Nahid
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Äldre och framtidens teknik - ett datavetenskapligt perspektiv2005In: Den omvända ålderspyramiden, Linköping, Sweden: Linköping University Electronic Press , 2005, p. 253-265Chapter in book (Other (popular science, discussion, etc.))
  • 32.
    Åberg, Johan
    et al.
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Maciuszek, Dennis
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    User modelling for live help systems2001In: Proceedings of the Second International Workshop on Electronic Commerce (Welcom'01) / [ed] G. Goos, J. Hartmanis, and J. van Leeuwen, Heidelberg: Springer Verlag , 2001, 1, p. 164-179Conference paper (Refereed)
    Abstract [en]

    We have explored the role of user modelling in live help systems for e-commerce web sites. There are several potential benefits with user modelling in this context: 1) Human assistants can use the personal information in the user models to provide the users with efficient support tailored to their personal needs; 2) Assistants can be more comfortable in their supporting role; 3) Consultation resources can be saved, and thus, financial savings can be made for the e-commerce company. A user modelling approachh as been implemented and deployed in a real web environment as part of a live help system. Following the deployment we have analysed consultation dialogue logs and answers to a questionnaire for participating assistants. This paper elaborates on these results, which show that assistants consider user modelling to be helpful and that consultation dialogues can be an important source for user model data collection. Based on lessons learned from the study, future directions for researchand development are carefully analysed and laid out.

    Originally we used the term web assistant system. However, similar system have recently begun to appear on e-commerce sites, commonly referred to as live help systems. To avoid future confusion we now refer to our work using this newly adopted terminology.

  • 33.
    Åberg, Johan
    et al.
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Maciuszek, Dennis
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    User Modelling for Live Help Systems: Initial Results2001In: Proceedings of the Third ACM Conference on Electronic Commerce (EC'01), AMC Press , 2001, 1, p. 194-197Conference paper (Refereed)
    Abstract [en]

    This paper explores the role of user modelling in live help systems for e-commerce web sites. There are several potential benefits with user modelling in this context: 1) Human assistants can use the personal information in the user models to provide the users with efficient support tailored to their personal needs; 2) Assistants can be more comfortable in their supporting role; 3) Consultation resources can be saved, and thus, financial savings can be made for the e-commerce company. A user modelling approach has been implemented and deployed in a real web environment as part of a live help system. Following the deployment we have analysed consultation dialogue logs and answers to a questionnaire for participating assistants. The initial results show that assistants consider user modelling to be helpful and that consultation dialogues can be an important source for user model data collection.

1 - 33 of 33
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