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  • 2801.
    Velupillai, Sumithra
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Dalianis, Hercules
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Automatic Construction of Domain-specific Dictionaries on Sparse Parallel Corpora in the Nordic languages2008Ingår i: Workshop MMIES-2: Multi-source, Multilingual Information Extraction and Summarization, Held in conjunction with COLING-2008, 2008Konferensbidrag (Refereegranskat)
  • 2802.
    Velupillai, Sumithra
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Dalianis, Hercules
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Duneld, Martin
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Diagnosing Diagnoses in Swedish Clinical Records2008Ingår i: Proceedings of The First Conference on Text and Data Mining of Clinical Documents, Turku, Louhi'08, September 3-4 2008, pp. 110-112: Karsten, H. , B. Back, T. Salakoski, S. Salanterä and H. Suominen , 2008Konferensbidrag (Refereegranskat)
  • 2803.
    Velupillai, Sumithra
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Dalianis, Hercules
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Hassel, Martin
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Nilsson, Gunnar
    Developing a standard for de-identifying electronic patient records written in Swedish: precision, recall and F-measure in a manual and computerized annotation trial2009Ingår i: International Journal of Medical Informatics, ISSN 1386-5056, E-ISSN 1872-8243, Vol. 78, nr 12, s. e19-e26Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Background

    Electronic patient records (EPRs) contain a large amount of information written in free text. This information is considered very valuable for research but is also very sensitive since the free text parts may contain information that could reveal the identity of a patient. Therefore, methods for de-identifying EPRs are needed. The work presented here aims to perform a manual and automatic Protected Health Information (PHI)-annotation trial for EPRs written in Swedish.

    Methods

    This study consists of two main parts: the initial creation of a manually PHI-annotated gold standard, and the porting and evaluation of an existing de-identification software written for American English to Swedish in a preliminary automatic de-identification trial. Results are measured with precision, recall and F-measure.

    Results

    This study reports fairly high Inter-Annotator Agreement (IAA) results on the manually created gold standard, especially for specific tags such as names. The average IAA over all tags was 0.65 F-measure (0.84 F-measure highest pairwise agreement). For name tags the average IAA was 0.80 F-measure (0.91 F-measure highest pairwise agreement). Porting a de-identification software written for American English to Swedish directly was unfortunately non-trivial, yielding poor results.

    Conclusion

    Developing gold standard sets as well as automatic systems for de-identification tasks in Swedish is feasible. However, discussions and definitions on identifiable information is needed, as well as further developments both on the tag sets and the annotation guidelines, in order to get a reliable gold standard. A completely new de-identification software needs to be developed.

  • 2804.
    Velupillai, Sumithra
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Dalianis, Hercules
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Kvist, Maria
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Factuality Levels of Diagnoses in Swedish Clinical Text2011Ingår i: User Centred Networked Health Care - Proceedings of MIE 2011 / [ed] Anne Moen, Stig Kjær Andersen, Jos Aarts, Petter Hurlen, 2011, s. 559-563Konferensbidrag (Refereegranskat)
    Abstract [en]

    Different levels of knowledge certainty, or factuality levels, are expressed in clinical health record documentation. This information is currently not fully exploited, as the subtleties expressed in natural language cannot easily be machine analyzed. Extracting relevant information from knowledge-intensive resources such as electronic health records can be used for improving health care in general by e.g. building automated information access systems. We present an annotation model of six factuality levels linked to diagnoses in Swedish clinical assessments from an emergency ward. Our main findings are that overall agreement is fairly high (0.7/0.58 F-measure, 0.73/0.6 Cohen's κ, Intra/Inter). These distinctions are important for knowledge models, since only approx. 50% of the diagnoses are affirmed with certainty. Moreover, our results indicate that there are patterns inherent in the diagnosis expressions themselves conveying factuality levels, showing that certainty is not only dependent on context cues.

  • 2805.
    Velupillai, Sumithra
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Duneld, Martin
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Dalianis, Hercules
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Automatic Dictionary Construction and Identification of Parallel Text Pairs2008Ingår i: Proceedings of the International Symposium on Using Corpora in Contrastive and Translation Studies (UCCTS), 2008Konferensbidrag (Refereegranskat)
  • 2806.
    Velupillai, Sumithra
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Duneld, MartinStockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.Henriksson, AronStockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.Kvist, MariaStockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.Skeppstedt, MariaStockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.Dalianis, HerculesStockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Louhi 2014: Special issue on health text mining and information analysis2015Proceedings (redaktörskap) (Refereegranskat)
  • 2807.
    Velupillai, Sumithra
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Duneld, Martin
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Henriksson, Aron
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Kvist, Maria
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Skeppstedt, Maria
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Dalianis, Hercules
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Louhi 2014: Special issue on health text mining and information analysis: introduction2015Ingår i: BMC Medical Informatics and Decision Making, ISSN 1472-6947, E-ISSN 1472-6947, Vol. 2, nr SI, s. 1-3Artikel i tidskrift (Refereegranskat)
  • 2808.
    Velupillai, Sumithra
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Hassel, Martin
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Dalianis, Hercules
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Finding the Parallel: Automatic Dictionary Construction and Identification of Parallel Text Pairs2010Ingår i: Using Corpora in Contrastive and Translation Studies / [ed] edited by Richard Xiao, Newcastle: Cambridge Scholars Publishing , 2010Kapitel i bok, del av antologi (Övrigt vetenskapligt)
  • 2809.
    Velupillai, Sumithra
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Ibrahim, Omran
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Kvist, Maria
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. Karolinska Institute, Sweden.
    Functions for personal health records in Sweden – patient perspectives2013Ingår i: Scandinavian Conference on Health Informatics 2013: Copenhagen, Denmark, August 20, 2013 / [ed] Gustav Bellika et al., Linköping: Linköping University Press , 2013, s. 95-95Konferensbidrag (Refereegranskat)
    Abstract [en]

    As part of the ongoing shift in health policy, with focus on patient empowerment, the Swedish government prioritizes the patients’ access to their medical records. Different models for personal health records (PHR) are suggested.

    Studies have shown difficulties for patients when navigating and understanding the information in their records. Electronic health record systems are physician-oriented and do not include patient-oriented functions. One problem with medical records is that they contain a lot of data which is usually kept as unstructured text in narrative form; this information overload needs to be structured and presented in a manner that patients understand. Furthermore, in order for the PHR to be a supporting tool for patients, there is a need to identify which key functions should be implemented to support patients. Usage of PHR is highly dependent on the information offered and that functions available meet patient needs. In Sweden, little research has been conducted regarding PHR functions  referred by patients. This study addresses the research question “Which PHR functions are preferred by patients living in Sweden?”.

  • 2810.
    Velupillai, Sumithra
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Kvist, Maria
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Fine-grained Certainty Level Annotations Used for Coarser-grained E-health Scenarios: Certainty Classication of Diagnostic Statements in Swedish Clinical Text2012Ingår i: Proceedings of the 13th international conference on Computational Linguistics and Intelligent Text Processing - Volume Part II / [ed] Alexander Gelbukh, Berlin/Heidelberg: Springer Berlin/Heidelberg, 2012, s. 450-461Konferensbidrag (Refereegranskat)
    Abstract [en]

    An important task in information access methods is distinguishingfactual information from speculative or negated information.Fine-grained certainty levels of diagnostic statements in Swedish clinicaltext are annotated in a corpus from a medical university hospital.The annotation model has two polarities (positive and negative) andthree certainty levels. However, there are many e-health scenarios wheresuch ne-grained certainty levels are not practical for information extraction.Instead, more coarse-grained groups are needed. We presentthree scenarios: adverse event surveillance, decision support alerts andautomatic summaries and collapse the ne-grained certainty level classi-cations into coarser-grained groups. We build automatic classiers foreach scenario and analyze the results quantitatively. Annotation discrepanciesare analyzed qualitatively through manual corpus analysis. Ourmain ndings are that it is feasible to use a corpus of ne-grained certaintylevel annotations to build classiers for coarser-grained real-worldscenarios: 0.89, 0.91 and 0.8 F-score (overall average).

  • 2811.
    Velupillai, Sumithra
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. University of Utah, USA.
    Mowery, Danielle L.
    Abdelrahman, Samir
    Christensen, Lee
    Chapman, Wendy W.
    BluLab: Temporal Information Extraction for the 2015 Clinical TempEval Challenge2015Ingår i: Proceedings of the 9th International Workshop on Semantic Evaluation (SemEval 2015), Association for Computational Linguistics, 2015, s. 815-819Konferensbidrag (Refereegranskat)
    Abstract [en]

    The 2015 Clinical TempEval Challenge addressed the problem of temporal reasoning in the clinical domain by providing an annotated corpus of pathology and clinical notes related to colon cancer patients. The challenge consisted of six subtasks: TIMEX3 and event span detection, TIMEX3 and event attribute classification, document relation time and narrative container relation classification. Our BluLab team participated in all six subtasks. For the TIMEX3 and event subtasks, we developed a ClearTK support vector machine pipeline using mainly simple lexical features along with information from rule-based systems. For the relation subtasks, we employed a conditional random fields classification approach, with input from a rule-based system for the narrative container relation subtask. Our team ranked first for all TIMEX3 and event subtasks, as well as for the document relation subtask.

  • 2812.
    Velupillai, Sumithra
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Mowery, Danielle L
    South, Brett R.
    Kvist, Maria
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Dalianis, Hercules
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Recent Advances in Clinical Natural Language Processing in Support of Semantic Analysis2015Ingår i: IMIA Yearbook of Medical Informatics, ISSN 0943-4747, Vol. 10, s. 183-193Artikel i tidskrift (Refereegranskat)
  • 2813.
    Velupillai, Sumithra
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Skeppstedt, Maria
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Kvist, Maria
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. Karolinska Institutet, Sweden.
    Mowery, Danielle
    Chapman, Brian E.
    Dalianis, Hercules
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Chapman, Wendy W.
    Cue-based assertion classification for Swedish clinical text-Developing a lexicon for pyConTextSwe2014Ingår i: Artificial Intelligence in Medicine, ISSN 0933-3657, E-ISSN 1873-2860, Vol. 61, nr 3, s. 137-144Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Objective: The ability of a cue-based system to accurately assert whether a disorder is affirmed, negated, or uncertain is dependent, in part, on its cue lexicon. In this paper, we continue our study of porting an assertion system (pyConTextNLP) from English to Swedish (pyConTextSwe) by creating an optimized assertion lexicon for clinical Swedish. Methods and material: We integrated cues from four external lexicons, along with generated inflections and combinations. We used subsets of a clinical corpus in Swedish. We applied four assertion classes (definite existence, probable existence, probable negated existence and definite negated existence) and two binary classes (existence yes/no and uncertainty yes/no) to pyConTextSwe. We compared pyConTextSwe's performance with and without the added cues on a development set, and improved the lexicon further after an error analysis. On a separate evaluation set, we calculated the system's final performance. Results: Following integration steps, we added 454 cues to pyConTextSwe. The optimized lexicon developed after an error analysis resulted in statistically significant improvements on the development set (83%F-score, overall). The system's final F-scores on an evaluation set were 81% (overall). For the individual assertion classes, F-score results were 88% (definite existence), 81% (probable existence), 55% (probable negated existence), and 63% (definite negated existence). For the binary classifications existence yes/no and uncertainty yes/no, final system performance was 97%/87% and 78%/86% F-score, respectively. Conclusions: We have successfully ported pyConTextNLP to Swedish (pyConTextSwe). We have created an extensive and useful assertion lexicon for Swedish clinical text, which could form a valuable resource for similar studies, and which is publicly available.

  • 2814.
    Velupillai, Sumithra
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Skeppstedt, Maria
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Kvist, Maria
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. Karolinska University Hospital.
    Mowery, Danielle
    Chapman, Brian E.
    Dalianis, Hercules
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Chapman, Wendy W.
    Porting a Rule-based Assertion Classifier for Clinical Text from English to Swedish2013Ingår i: Proceedings of the 4th International Louhi Workshop on Health Document Text Mining and Information Analysis - Louhi 2013 / [ed] Hanna Suominen, NICTA, Australia's ICT Research Centre of Excellence , 2013Konferensbidrag (Refereegranskat)
    Abstract [en]

    An existing rule-based assertion classier is ported from En- glish to Swedish: pyConTextSwe. Evaluation on Swedish clinical texts shows that the English lexical resources are useful, but that there are assertion cues not obtainable in existing resources. Iterative error cor- rection of cue lexicons improves results for the ported classier. Overall nal results are 82% F-score on a development set and 74% on a test set.

  • 2815.
    Velupillai, Sumithra
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Weegar, Rebecka
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Kvist, Maria
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Temporal Annotation of Swedish Intensive Care Notes2016Konferensbidrag (Refereegranskat)
    Abstract [en]

    We describe the creation of a corpus of Swedish intensive care unit (ICU) notes annotated for temporal expressions. Clinical notes from an ICU in Stockholm, Sweden were used. The HeidelTime system was adapted to develop Swedish clinical time expression (TIMEX3) resources. Overall micro-average Inter-Annotator Agreement is high (86% F1). We have created Swedish lexical resources with clinically specific time expressions that will be useful for the development of a Swedish clinical text temporal reasoning system.

  • 2816.
    Verhagen, Harko
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    de Azevedo, Razera
    Cerratto-Pargman, Teresa
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Ramberg, Robert
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Plagiarism awareness, perception, and attitudes among students and teachers in Swedish higher education – a case study2010Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]
    The objective of the empirical study presented in this paper was to investigate students’ and teachers attitudes towards the issue of plagiarism. The study was conducted at the department of Computer and Systems Sciences (DSV) at Stockholm University (SU) in Sweden in 2009. For the purpose of the investigation, we chose to make a comparison between results obtained by Uppsala University in a previously survey focused on the study of prevention of plagiarism in student work in 2005 (Henriksson, 2008). The goal with the comparison was twofold: i) to point at similarities and differences found on the issue of how plagiarism is perceived and faced by teachers and students at both universities as well as to summarize teachers’ and students’ attitudes towards plagiarism at DSV-Stockholm University and Ii) to develop a strategy to prevent plagiarism at DSV- Stockholm University. The survey which was in English and was sent by e-mail to teachers and students at the master level at DSV and was answered by 47 students and 24 teachers. Results obtained can be organized into the following topics: Awareness of plagiarism (consisting of a comparison between students and teachers); attitudes towards plagiarism(consisting of a comparison between students and teachers and European and non-European students studying at DSV); perception of plagiarism (consisting of a comparison between students and teachers and European and non-European students studying at DSV) and, comparison of results obtained by Uppsala and Stockholm University.
  • 2817.
    Verhagen, Harko
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Autonomy and reasoning for natural and artificial agents2004Ingår i: Agents and computational autonomy: potential, risks, and solutions / [ed] Matthias Nickles, Michael Rovatsos, Gerhard Weiss, Berlin: Springer Berlin/Heidelberg, 2004, Vol. 2969 , s. 83-94Konferensbidrag (Övrigt vetenskapligt)
  • 2818.
    Verhagen, Harko
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Is there an I in We? Combining individual and collective modes of decision making2013Ingår i: Normative Multi-Agent Systems: NorMAS 2013, 2013Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Social simulation is one of the main areas for agent-based model use with norms being one of the mostly used and studied social mechanisms. The focus has been on inter-agent mechanisms through which individuals are influenced by social norms, resulting in dynamics of norms such as emergence and diffusion. What is lacking is an integration of models of collectiveness such as we-intentionality to transcend the atomistic models such as rational choice, game theory, and social choice theory. We will start with Webers Weber distinction between four types of actions resulting from instrumental, normative, emotional or affectual and traditional motivations for actions. Then we present social norms in the light of the growing literature on collective reasoning/intentionality/rationality and outline a model in which social norms are modelled based on an agent’s collective capacity. This will be connected to the Consumat agent architecture that integrates the social and individual aspects of automatic, instrumental and normative decision making.

  • 2819.
    Verhagen, Harko
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Multiagent systems research and social science theory2006Ingår i: Handbook of research on nature inspired computing for economics and management / [ed] Jean-Philippe Rennard, Hershey, Pa.: Idea Group Reference , 2006, s. 101-110Kapitel i bok, del av antologi (Övrigt vetenskapligt)
    Abstract [en]

    This chapter describes the possible relationships between multiagent systems research and social science research, more particularly sociology. It gives examples of the consequences and possibilities of these relationships and describes some of the important issues and concepts in each of these areas. It finally points out some future directions for a bidirectional relationship between the social sciences and multiagent systems research which hopefully will help researchers in both research areas as well as researchers in management and organisation theory.

  • 2820.
    Verhagen, Harko
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Norms, individualist and collectivist perspectives (on decision making)2014Konferensbidrag (Övrigt vetenskapligt)
  • 2821.
    Verhagen, Harko
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. Kommunikation och kognition.
    Normtypologies2007Ingår i: Normative Multi-Agent Systems 2007. Dagstuhl Seminar Proceedings 07122, 2007Konferensbidrag (Övrigt vetenskapligt)
  • 2822.
    Verhagen, Harko
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. Kommunikation och kognition.
    Cerratto-Pargman, Teresa
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. Kommunikation och kognition.
    Hansson, Henrik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. Kommunikation och kognition.
    Näckros, Kjell
    Ramberg, Robert
    Razera de Azevedo, Diana
    Westerborn, Mats
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. Data- och Systemvetenskap. Tillämpad IT. Tillämpad IT med entreprenörskap.
    Wettergren, Gunnar
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. Programvaruutveckling.
    Control, creativity and cheating in traditional and flexible education - Validating students knowledge in higher education in three educational setups2009Ingår i: 23rd ICDE World Conference on Open Learning and Distance Education including the 2009 EADTU Annual Conference, to be held on 7-10 June 2009 in Maastricht, Netherlands., 2009Konferensbidrag (Övrigt vetenskapligt)
  • 2823.
    Verhagen, Harko
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Eladhari, Mirjam
    Gotland University, , .
    Johansson, Magnus
    Stockholm University, , .
    Constructing autonomous social characters for games2011Konferensbidrag (Refereegranskat)
  • 2824.
    Verhagen, Harko
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Elsenbroich, Corinna
    Surrey University, , .
    Computational Social Science and the Search for Mechanisms2013Övrigt (Övrig (populärvetenskap, debatt, mm))
  • 2825.
    Verhagen, Harko
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Elsenbroich, Corinna
    Putting the agent back together again: needs for integrating social and behavioural sciences for agent-based social simulation2012Ingår i: Report from Dagstuhl Seminar 12111: Normative Multi-Agent Systems / [ed] Giulia Andrighetto, Guido Governatori, Pablo Noriega, and Leon van der Torre, 2012, s. 46-Konferensbidrag (Övrigt vetenskapligt)
  • 2826.
    Verhagen, Harko
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Elsenbroich, Corinna
    Fällström, Kurt
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Modelling Contextual Decision-Making in Dilemma Games2017Ingår i: Advances in Social Simulation 2015 / [ed] Wander Jager, Rineke Verbrugge, Andreas Flache, Gert de Roo, Lex Hoogduin, Charlotte Hemelrijk, Cham, Switzerland: Springer, 2017, s. 121-127Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    Social dilemmas such as the Prisoner’s Dilemma and the Tragedy of the Commons have attracted widespread interest in several social sciences and humanities including economics, sociology and philosophy. Different frameworks of human decision-making produce different answers to these dilemmas. Common for most real-world analyses of the dilemmas is finding that behaviour and choices depend on the decision context. Thus an all-in-one solution such as the rational choice model is untenable. Rather, a framework for agent-based social simulation of real-world behaviour should start by recognising different modes of decisionmaking. This paper presents such a framework and an initial evaluation of its results in two cases, (1) a repeated prisoner’s dilemma tournament playing against a set of well-known base models, and (2) a Tragedy of the Commons simulation.

  • 2827.
    Verhagen, Harko
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Johansson, Magnus
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Demystifying guilds: MMORPG-playing and norms2009Ingår i: Breaking New Ground: Innovation in Games, Play, Practice and Theory, 2009Konferensbidrag (Refereegranskat)
  • 2828.
    Verhagen, Harko
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Johansson, Magnus
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Eladhari, Mirjam P.
    The Need for Socially Believable NPCs: Game Designers' View2012Ingår i: ECREA’s Pre-Conference: Experiencing Digital Games: Use, Effects & Culture of Gaming, 2012Konferensbidrag (Refereegranskat)
  • 2829.
    Verhagen, Harko
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Johansson, Magnus
    Jager, Wander
    Games and Online Research Methods2017Ingår i: The SAGE Handbook of Online Research Methods / [ed] Nigel Fielding, Raymond M. Lee, Grant Blank, Los Angeles: Sage Publications, 2017, nr 2, s. 295-306Kapitel i bok, del av antologi (Refereegranskat)
  • 2830.
    Verhagen, Harko
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Noriega, PabloConsejo Superior de Investigaciones Científicas, , Institut d'Investigació en Intelligència Artificial.Balke, TinaSurrey University.De Vos, MarinaBath University .
    Social coordination: principles, artefacts and theories (SOCIAL.PATH).2013Proceedings (redaktörskap) (Övrig (populärvetenskap, debatt, mm))
  • 2831.
    Verhagen, Harko
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Noriega, Pablo
    d’Inverno, Mark
    Towards a Design Framework for Controlled Hybrid Social Games2013Ingår i: Social Coordination: Principles, Artefacts and Theories (SOCIAL.PATH): AISB Convention 2013 / [ed] Harko Verhagen, Pablo Noriega, Tina Balke, Marina de Vos, 2013, s. 83-87Konferensbidrag (Refereegranskat)
    Abstract [en]

    We propose a framework for designing and deploying games where social behaviour is kept under control. This framework may also be used for designing other dynamic coordinated social spaces.

  • 2832.
    Verhagen, Harko
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Palosaari Eladhari, Mirjam
    Johansson, Magnus
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    McCoy, Josh
    Social Believability in Games2013Ingår i: Advances in Computer Entertainment: 10th International Conference. Proceedings / [ed] Dennis Reidsma, Haruhiro Katayose, Anton Nijholt, Springer International Publishing , 2013, s. 649-652Konferensbidrag (Refereegranskat)
    Abstract [en]

    The Social Believability in Games Workshop intends to be a point of interaction for researchers and game developers interested in different aspects of modelling, discussing, and developing believable social agents and Non-Player Characters (NPCs). This can include discussions around behaviour based on social and behavioural science theories and models, social affordances when interacting with game worlds and more. The intention is to invite participants from a multitude of disciplines in order to create a broad spectrum of approaches to the area.

  • 2833.
    Vickman, Sara
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Larsson, Aron
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Olsson, Leif
    Mittuniversitetet, , Dept. of Information Technology and Media.
    Prerequisites for Decision Aid in Socially Responsible Investment Appraisals2012Ingår i: International Journal of Engineering Management and Economics (IJEME), ISSN 1756-5154, E-ISSN 1756-5162, Vol. 3, nr 4, s. 359-377Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper explores investment appraisals (or capital budgeting decisions) restrained by various sources of uncertainty and influenced by corporate social responsibility and socially responsible investment thinking (SRI). The study aims to provide input for further development of computer based methods for integrating semi-quantitative decision analysis modelling with other quantitative methods for investment evaluations. Of particular interest in this paper is to assess the additional aspects of investment appraisals that derive from SRI thinking together with the multiple sources of uncertainty arising in such decision problems. We assess characteristics of how managers’ try to account for corporate social responsibility, how they cope with evaluating upon objectives beyond monetary return on investment (ROI) and how they manage uncertainty and the source of the uncertainties they emphasize. The perceived need for analytical decision aid in socially responsible investment decision making is analysed and the applicability of real options is assessed relative to the managers’ conditions and concerns. We conclude that organisations are generally exposed to and also consider both aleatory and epistemic uncertainty and need to handle other aspects of investments beyond monetary ROI. There is a mix of macro and micro variables creating a diversified environment where valuation methods such as real options in combination with decision analysis modelling could help in structuring the problem and enlighten different areas and aspects, thereby providing a framework for accounting for corporate social responsibility in capital budgeting decision making.

  • 2834. Vilkkumaa, Eeva
    et al.
    Salo, Ahti
    Liesio, Juuso
    Siddiqui, Afzal
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. University College London, UK.
    Fostering breakthrough technologies - How do optimal funding decisions depend on evaluation accuracy?2015Ingår i: Technological forecasting & social change, ISSN 0040-1625, E-ISSN 1873-5509, Vol. 96, s. 173-190Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    There is a growing interest in fostering breakthrough technologies that offer exceptionally high value to society. However, when starting technology projects, it is impossible to know which of them have the potential to lead to breakthroughs. Therefore, organizations have adopted funding policies in which on-going projects are subjected to interim evaluations based on which some projects may be abandoned to release resources for seizing new opportunities. In this paper, we study which funding policies are optimal when the objective is either (i) to maximize the expected value of the project portfolio, or (ii) to maximize the expected number of exceptionally excellent projects that may lead to breakthrough technologies. We show that the optimal policy for funding exceptionally excellent projects is to start a large number of projects and abandon a high proportion of them later, whereas the optimal policy for maximizing the expected value of the project portfolio is to grant long-term funding to a smaller set of projects based on initial evaluation. Furthermore, we show how the trade-off between these two objectives depends on the initial project evaluation accuracy and the rate at which this accuracy improves. Our results suggest that this trade-off is particularly significant when the initial project evaluations are very uncertain but become more accurate soon after the projects have been launched. In such a setting, policies that seek to maximize the expected portfolio value may fail to promote breakthrough technologies.

  • 2835. Virasjoki, Vilma
    et al.
    Rocha, Paula
    Siddiqui, Afzal S.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. University College London, U.K..
    Salo, Ahti
    Market Impacts of Energy Storage in a Transmission-Constrained Power System2016Ingår i: IEEE Transactions on Power Systems, ISSN 0885-8950, E-ISSN 1558-0679, Vol. 31, nr 5, s. 4108-4117Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Environmental concerns have motivated governments in the European Union and elsewhere to set ambitious targets for generation from renewable energy (RE) technologies and to offer subsidies for their adoption along with priority grid access. However, because RE technologies like solar and wind power are intermittent, their penetration places greater strain on existing conventional power plants that need to ramp up more often. In turn, energy storage technologies, e.g., pumped hydro storage or compressed air storage, are proposed to offset the intermittency of RE technologies and to facilitate their integration into the grid. We assess the economic and environmental consequences of storage via a complementarity model of a stylized Western European power system with market power, representation of the transmission grid, and uncertainty in RE output. Although storage helps to reduce congestion and ramping costs, it may actually increase greenhouse gas emissions from conventional power plants in a perfectly competitive setting. Conversely, strategic use of storage by producers renders it less effective at curbing both congestion and ramping costs, while having no net overall impact on emissions.

  • 2836. Vitak, Jessica
    et al.
    Wisniewski, Pamela
    Page, Xinru
    Lampinen, Airi
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Litt, Eden
    De Wolf, Ralf
    Gage Kelley, Patrick
    Sleeper, Manya
    The Future of Networked Privacy: Challenges and Opportunities2015Ingår i: CSCW'15, the 18th ACM Conference Computer Supported Cooperative Work & Social Computing, ACM Press , 2015Konferensbidrag (Övrigt vetenskapligt)
  • 2837. Višković, Verena
    et al.
    Chen, Yihsu
    Siddiqui, Afzal S.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. University College London, United Kingdom; HEC Montréal, Canada.
    Implications of the EU Emissions Trading System for the South-East Europe Regional Electricity Market2017Ingår i: Energy Economics, ISSN 0140-9883, E-ISSN 1873-6181, Vol. 65, s. 251-261Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    As part of its climate policy, the European Union (EU) aims to reduce greenhouse gas (GHG) emissions levels by 20% by the year 2020 compared to 1990 levels. Although the EU is projected to reach this goal, its achievement of objectives under its Emissions Trading System (ETS) may be delayed by carbon leakage, which is defined as a situation in which the reduction in emissions in the ETS region is partially offset by an increase in carbon emissions in the non-ETS regions. We study the interaction between emissions and hydropower availability in order to estimate the magnitude of carbon leakage in the South-East Europe Regional Electricity Market (SEE-REM) via a bottom-up partial equilibrium framework. We find that 6.3% to 40.5% of the emissions reduction achieved in the ETS part of SEE-REM could be leaked to the non-ETS part depending on the price of allowances. Somewhat surprisingly, greater hydropower availability may increase emissions in the ETS part of SEE-REM. However, carbon leakage might be limited by demand response to higher electricity prices in the non-ETS area of SEE-REM. Such carbon leakage can affect both the competitiveness of producers in ETS member countries on the periphery of the ETS and the achievement of EU targets for CO2 emissions reduction. Meanwhile, higher non-ETS electricity prices imply that the current policy can have undesirable outcomes for consumers in non-ETS countries, while non-ETS producers would experience an increase in their profits due to higher power prices as well as exports. The presence of carbon leakage in SEE-REM suggests that current EU policy might become more effective when it is expanded to cover more countries in the future.

  • 2838. Void, Tone
    et al.
    Marzo, Richard
    Waern, Annika
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Play Style Survey2009Ingår i: Real-Time research: an experiment in the design of scholarship / [ed] S. Dikkers, C. Steinkuhler, K. Squire, and E. Zimmerman, Pittsburgh: ETC Press, 2009Kapitel i bok, del av antologi (Övrigt vetenskapligt)
  • 2839. Vorontsova, Anna
    et al.
    Rusu, Lazar
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Determinants of IT Outsourcing Relationships: a Recipient - Provider Perspective2014Ingår i: CENTERIS - Conference on ENTERprise Information Systems / [ed] João Varajão, Amsterdam: Elsevier, 2014, s. 588-597Konferensbidrag (Refereegranskat)
  • 2840. Väätäjä, Heli
    et al.
    Majaranta, Päivi
    Törnqvist, Heini
    Ainasoja, Mari
    Surakka, Veikko
    Juhlin, Oskar
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Mancini, Clara
    Technology for Bonding in Human-Animal Interaction2017Ingår i: Proceedings of the Fourth International Conference on Animal-Computer Interaction, Association for Computing Machinery (ACM), 2017, artikel-id 20Konferensbidrag (Refereegranskat)
    Abstract [en]

    This workshop focuses on the use and influence of technology on human-animal bonding, and how to facilitate them with technology. We explore the elements and characteristics of human-animal bonding, and how technology is connected to emotions and bonding between the human and the animal. We are particularly interested in animal's experiences, emotions, and welfare in bonding. The workshop facilitates discussion, creates a framework to support design activities, identifies future research themes, and creates ideas on facilitating the mutual bonding in human-animal interaction. The main focus is on dogs, but workshop aims is to pave way for further investigations and research with other domestic animals, such as cats, horses, and rabbits.

  • 2841. Våge, Lars
    et al.
    Dalianis, Hercules
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Iselid, Lars
    Informationssökning på Internet2008 (uppl. 2. [utök.] uppl.)Bok (Övrigt vetenskapligt)
  • 2842.
    Waern, Annika
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    I'm in love with someone who doesn't even exist! Bleed in the context of a computer game2010Ingår i: Nordic DIGRA conference, 2010Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]
    It is not unusual for computer games to include romance, but most games treat romance as a narrative theme rather than as an integrated part of gameplay. In this article I investigate the gameplay experience in the game Dragon Age, a single-player game that allows players to actively engage in romance. Based on an investigation of blog and community comments, we argue that this sometimes will create an experience that is similar to the “bleed” effect in non-computerised role-play, and that the player to some extent shares emotions with his or her character.
  • 2843.
    Waern, Annika
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Framing Games2012Ingår i: Proceedings of 2012 DiGRA Nordic Conference: Local and Global – Games in Culture and Society, Digital Games Research Association , 2012Konferensbidrag (Refereegranskat)
    Abstract [en]

    In this article, I revisit the everlasting question of what constitutes a game. My purpose is to arrive at a permissive definition that can serve to bridge digital and non-digital game studies. The way I approach the issue is through eliciting the qualities of games for which I believe game studies provides appropriate tools. The article centres on the idea that games are systems, which have been designed to be played or evolved within a play practice. I use previous literature to carefully examine what is required from a game system, as well as what signifies play in relationship to other human activities. The strength of game studies is that it has developed ways to understand how these two aspects are interrelated - how play is shaped by systems, and how systems need to be constructed to support play.

  • 2844.
    Waern, Annika
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    I'm in love with someone who doesn't exist!: Bleed in the context of a computer game2011Ingår i: Journal of Gaming & Virtual Worlds, ISSN 1757-191X, E-ISSN 1757-1928, Vol. 3, nr 3, s. 239-257Artikel i tidskrift (Refereegranskat)
    Abstract [sv]

    Det är inte ovanligt att datorspel innehåller romantiska element, men det är ovanligt att datorspel får folk att reagera med romantiska känslor. I den här artikeln undersöker jag den romantiska upplevelsen i spelet Dragon Age. Med utgångspunkt i en samling blog- och community kommentarer argumenterar jag för att spelet skapar en 'bleed' effekt: på så sätt att en del spelare förälskar sig i de karaktärer som de utvecklat en romans med i spelet. Artikeln identifierar vissa nyckelaspekter i hur spelets design bidrar till effekten. Utöver berättelsestrukturer och design av spelets karaktärer visar jag hur spelarnas egen önskan att skapa en 'säker zon' för romantiska upplevelser och hur spelarens självprojektion bidrar till effekten.

  • 2845.
    Waern, Annika
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Ahmet, Zeynep
    Sundström, Daniel
    An In-Game Reporting Tool for Pervasive Games2009Ingår i: ACM Conference on Advances in Computer Entertainment Technology (ACE), 2009Konferensbidrag (Refereegranskat)
  • 2846.
    Waern, Annika
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Balan, Elena
    Nevelsteen, Kim
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Athletes and street acrobats: designing for play as a community value in parkour2012Ingår i: CHI '12 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems, New York: Association for Computing Machinery (ACM), 2012, s. 869-878Konferensbidrag (Refereegranskat)
    Abstract [en]

    Participatory design methods face challenges when designing for a widespread youth community. In such projects, it is not enough to design in collaboration with a few selected individuals; one must also strive to understand the community at a deeper level and incorporate its values and practices into the design solution. We report on our process of designing with, and for, an identified youth group: the Parkour and Freerunning community. We show how the successful design relied not only on employing methods of participatory observation and participatory design, but also on acquiring an understanding of the practice as a ‘fun community’, valuing play over achievement and competition.

  • 2847.
    Waern, Annika
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. Kommunikation och kognition. Mobile Life.
    Denward, Marie
    Broadcast Culture Meets Role-Playing Culture2008Kapitel i bok, del av antologi (Övrigt vetenskapligt)
  • 2848.
    Waern, Annika
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Denward, Marie
    On the edge of reality: Reality fiction in "Sanningen om Marika"2009Ingår i: Breaking New Ground: Innovation in Games, Play, Practice and Theory: Proceedings of DiGRA 2009, 2009Konferensbidrag (Refereegranskat)
    Abstract [en]

    The Alternate Reality Game genre inspires a mode of play in which the participants choose to act as if the game world was real. Jane McGonigal has argued that one of the most attractive features of an ARG is the ‘Pinnochio’ effect: at the same time that the players deeply long to believe in them, it is in reality impossible to believe in them for real. In this article, we study “Sanningen om Marika”, a game production where fact and fiction was blurred in a way that made some participants believe that the production was reality rather than fiction, whereas other participants found the production deeply engaging. We discuss the different participant interpretations of the production and how it affected the players´ mode of engagement. We also outline some of the design choices that caused the effect.

  • 2849.
    Waern, Annika
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Magnusson, Charlotte
    CERTEC, , .
    Rassmus-Gröhn, K
    CERTEC, , .
    Bjernryd, Å
    CERTEC, , .
    Bernhardsson, H
    CERTEC, , .
    Jakobsson, A
    CERTEC, , .
    Salo, J
    Do-Fi, , .
    Wallon, M
    Hjälpmedelscentralen, , .
    Hedvall, P.O.
    CERTEC, , .
    Navigating the world and learning to like it: Mobility training through a pervasive game2011Konferensbidrag (Refereegranskat)
    Abstract [sv]

    Artikeln introducerar tanken att platsberoende ubika spel kan användas för att göra mobilitetsträning för synskadade barn roligare. Vi beskriver en användarcentrerad utvecklingsprocess som har utförts i samarbete både med synskadade barn och rehabiliteringspersonal. Vi presenterar ett nytt spelkoncept som kombinerar platsberoende spel, ljudspår, och gestbaserad interaktion. Vi rapporterar ochdiskuterar erfarenheterna från utvecklingsarbetet och föreslår riktlinjer för design för denna typ av spel.

  • 2850.
    Waern, Annika
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Montola, Markus
    Stenros, Jaakko
    The three-sixty illusion: Designing for immersion in pervasive games2009Ingår i: Conference on Human Factors in Computer Systems, 2009Konferensbidrag (Refereegranskat)
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