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  • 2901.
    Tollmar, Konrad
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Ramberg, Robert
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Harling, Linus
    On Derive for Mobile Experience: Observing the Mobile User Experience2010Conference paper (Other academic)
  • 2902.
    Tollmar, Konrad
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Towards CSCW design in the Scandinavian tradition2001Doctoral thesis, monograph (Other academic)
    Abstract [en]

    This thesis is about how to design Computer Supported Cooperative Work systems (CSCW) on the basis of design practice that is established in the Scandinavian model of System Design. The approach of the thesis is to develop an understanding of the design of CSCW environments through a series of case studies. These case studies, the CoDesk system, the AtWork system and the VideoCafe system, cover a variety of methods from the Scandinavian tradition in cooperative design. Studying how these methods have succeeded has been the primary source of inspiration for my thesis. In particular, this thesis will focus on the following issues: Can simulation of realistic work situations be used for cooperative design of CSCW systems by developers and users? And, how can we balance a design based on daily work practice with exploration of innovative CSCW solutions? Furthermore we are also investigating how cooperative design could be integrated in the evolving use and how to combine different design approaches into a coherent design. Given the complexity of CSCW it will be argued that the design of CSCW system needs to mix design methods with various backgrounds, such as methods that have their roots in workplace practice with methods that transcend common styles of cooperation, to balance different design methods' strengths and weaknesses. It is suggested that a usable approach is to define and use different design orientations in order to deal with this complexity. The use of a design orientation helps in selecting the essential element that is at the heart of the design. This approach seems more usable than working with pure design methods with specific outlines. A design orientation integrates instead a holistic view into the design by leaving the pre-dominant sequential notion in system modeling.

  • 2903.
    Tollmar, Konrad
    et al.
    The Royal Institute of Technology, Stockholm.
    Ramberg, Robert
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Harling, Linus
    On The Derive for Mobile Experience2011In: Wi: Journal of Mobile Media, ISSN 1918-2104Article in journal (Refereed)
  • 2904. Tolsgaard, Martin G.
    et al.
    Jepsen, Rikke M. H. G.
    Rasmussen, Maria B.
    Kayser, Lars
    Fors, Uno
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Laursen, Lars C.
    Svendsen, Jesper H.
    Ringsted, Charlotte
    The effect of constructing versus solving virtual patient cases on transfer of learning: a randomized trial2016In: Perspectives on Medical Education, ISSN 2212-277X, Vol. 5, no 1, p. 33-38Article in journal (Refereed)
    Abstract [en]

    The purpose of this study was to explore the effect of actively constructing virtual patient (VP) cases compared with solving VP cases on knowledge gains, skills transfer and time spent on cases. Forty-five fourth-year medical students were randomized to constructing (VP-construction, n = 23) or solving (VP-solving, n  = 22) four cardiopulmonary VP cases. Whereas the VP-solving group solved the cases, the VP-construction group only received the final diagnosis and had to complete the history, physical findings, and lab results. After a week, participants completed a transfer test involving two standardized patients representing cardiopulmonary cases. Performances on the transfer test were video-recorded and assessed by two blinded raters using the Reporter, Interpreter, Manager, Educator (RIME) framework. Thirty-nine participants completed the transfer test. The VP-construction group spent significantly more time on the VP cases compared with the VP-solving group, p = 0.002. There were no significant differences in RIME scores between the VP-construction group and VP-solving group, p = 0.54.

    In conclusion, engaging novice students in active VP case construction may be more time consuming than solving VP cases, without resulting in superior skills transfer.

  • 2905. Tomos, Florica
    et al.
    Mozelius, Peter
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Shabalina, Olga
    Balan, Oana Cristina
    Malliarakis, Christos
    Miller, Christopher
    Turner, David
    Jones, Paul
    An international approach to creative pedagogy and students’ preferences of interactive media2013In: Proceedings of the 12th European Conference on e-Learning – ECEL 2013 / [ed] Mélanie Ciussi, Marc Augier, Reading, UK: Academic Conferences and Publishing International , 2013, p. 479-487Conference paper (Refereed)
    Abstract [en]

    The world population lives within an information society, depicted as an era of “integrated software applications” where the new technology and information technology paradigms are affecting the global environment and the international trend of education (Tapscott and Caston, 1993; Ottestad, 2010). Within this context e-learning is presented by Ottestad (2010) as an emerging pedagogy where teachers’ creativity, competence and professionalism (Liakopolou, 2011; Davies, 2013) as a quality force come together with the new technologies to meet students’ preferences for optional learning resources, to empower students and increase their confidence as well as helping learning, understanding, reinforcing knowledge, stimulating interest, increasing collaboration and motivation (Craft and Jeffrey, 2008; Inglis et al., 2011). Previous studies demonstrated that the generation of learners called “Net generation”, “Millenians”, “Digital natives” or “Web generation” (Tapscott, 1998; Howe and Strauss, 2000; Prensky, 2006; Hartmann, 2003 in: Van den Beemt et al., 2011) uses the interactive media vigorously (Duimel and DeHaan, 2007; Schulmeister, 2008 in: Van den Beemt et al., 2011). This study is an international approach developed across four countries: Wales, Sweden, Russia and Greece. The research conducted a Focus Group based on e-learning resource presentation and Surveys with Questionnaires. The results demonstrated students’ preferences for dynamic presentations, effective animation, comic effects (Kruger, 2004) and interactive media. In order to find different learning styles and preferences, online and paper form Questionnaires for course evaluation and assessment were conducted and compared with teachers’ observations and notes. The study proposed optional as well as additional e-learning resources in order to reinforce student learning and it was based on learning theories such as: the concept of learning and reinforcement, stimulus, remembering and schema which can activate experiences stored in the mind (Skinner, 1930 in Kintsch, 1977; Bartlett, 1995). The results of this research are supporting the cognitive development theory, the role of visual and the practical knowledge theory – know-how of interiorization and exteriorization, being a contribution to knowledge (Vygotsky, 1978; Piaget, 1970; Wadsworth, 1979).

  • 2906.
    Toufaili, Houssam
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Kajko-Mattsson, Miroslawa E J
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Software Transition Benchmarking2010In: Software Maintenance Maturity Model Workshop (S3M'10), springer , 2010Conference paper (Other academic)
  • 2907. Tran, Carrie
    et al.
    Toth-Pal, Eva
    Kaila, Päivi
    Ekblad, Solvig
    Fors, Uno
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Salminen, Helena
    How can a virtual patient model facilitate students´ interprofessional learning in primary healthcare?2017In: AMEE 2017: Abstract Book, Association for medical education in Europe (AMEE) , 2017Conference paper (Refereed)
  • 2908.
    Truex, Duane
    et al.
    Mid Sweden University, , ITM.
    Olsson, Leif
    Mid Sweden University, , ITM.
    Lindblad-Gidlund, Katarina
    Mid Sweden University, , ITM.
    Sefyrin, Johanna
    Mid Sweden University, , ITM.
    Larsson, Aron
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Nilsson, Olof
    Mid Sweden University, , ITM.
    Anderson, Karen
    Mid Sweden University, , ITM.
    Borglund, Erik
    Mid Sweden University, , ITM.
    Asproth, Viveca
    Mid Sweden University, , ITM.
    Position Statement: Sustainable Information and Information Systems (SIIS)2011Conference paper (Refereed)
    Abstract [en]

    In this position statement we provide our understanding of the relation between the IS field and the notion of sustainability, and present our focus through a characterization of the “sustainability research” construct. By doing so, we hope to contribute to the discourse on a clarification of the construct itself in our research community.

  • 2909. Tselas, Nikolaos
    et al.
    Papapetrou, Panagiotis
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Benchmarking Dynamic Time Warping on Nearest Neighbor Classification of Electrocardiograms2014In: Proceedings of the 7th International Conference on PErvasive Technologies Related to Assistive Environments, ACM Press, 2014Conference paper (Refereed)
    Abstract [en]

    The human cardiovascular system is a complicated structure that has been the focus of research in many different domains, such as medicine, biology, as well as computer science. Due to the complexity of the heart, even nowadays some of the most common disorders are still hard to identify. In this paper, we map each ECG to a time series or set of time series and explore the applicability of two common time series similarity matching methods, namely, DTW and cDTW, to the problem of ECG classification. We benchmark the two methods on four different datasets in terms of accuracy. In addition, we explore their predictive performance when various ECG channels are taken into account. The latter is performed using a dataset taken from Physiobank. Our findings suggest that different ECG channels are more appropriate for different cardiovascular malfunctions.

  • 2910.
    Tuncer, Sylvaine
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Non-participants joining in an interaction in shared work spaces: Multimodal practices to enter the floor and account for it2018In: Journal of Pragmatics, ISSN 0378-2166, E-ISSN 1879-1387, Vol. 132, p. 76-90Article in journal (Refereed)
    Abstract [en]

    This article studies how co-present workers can join in a co-present interaction they were not previously involved in, thus challenging initial participants' interactional preserve. It is based on ethnographically-informed analyses of video-recorded interactions in workplaces, in English as a lingua franca and in French. Potential joiners' recurrent embodied and verbal practices are identified and analyzed, showing regular methods associated with potential joiners' position relative to the F-formation, and different layouts typical of workplaces. Another set of findings bears on how potential joiners shape their move so as to account for joining in at that moment, to project a more or less extended participation, and to implement a collaborative project. Beyond the variety of projects the practice can serve, potential joiners' moves are systematically designed so as to demonstrate their contribution to the progression of work.

  • 2911.
    Tyseng, Daniel
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Utveckling av tjänster för ett mobilt medium2004Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    The mobile revolution is here to stay, and today most people have (at least) one cell phone at home. Some even a PDA (Personal Digital Assistant)as a complement for the simpler tasks at the office, e.g sending e-mail, word processing, browsing the Internet etc. Many business have also given the employees the opportunity to do some of the business tasks inbetweeen customer visits with the help from a cell phone or PDA.

    Despite all this, the so called Internet connected mobile revolution is often mentioned as a big failure. Maybe because the people in general tended not to use the new technology as much as the companies predicted. This could be because they still haven't learned how it works, or just don't seem to have the need for services provided.

    After a couple of failures in the development process, almost every cell phone has support for mobile Internet today. Instead the responsibility lies on the content providers and cell phone operators. The users are going to need killer applications, e.g. services as e-mail, chat, time tables, services they feel they can't be without. How is a service like this created then? And what kind of obstacles lies in the way of making this service available for everyone that uses a cell phone - not only the technical ones? What kind of responsibility do the operators have?

    To change from the Internet based platform to the mobile platform could contain some difficult tasks. Even if some technical issues occured during the project, the main challenge is not the technical one. In fact, the technical issues should not be a problem for companies already working with Internet technology.

  • 2912.
    Täckström, Oscar
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Velupillai, Sumithra
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Hassel, Martin
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Eriksson, Gunnar
    Dalianis, Hercules
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Karlgren, Jussi
    Uncertainty Detection as Approximate Max-Margin Sequence Labelling2010In: Proceedings of the Fourteenth Conference on Computational Natural Language Learning, Association for Computational Linguistics , 2010Conference paper (Other academic)
  • 2913.
    Uimonen, Paula
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    African art students and digital learning2011In: Interactive Media Use and Youth: Learning, Knowledge Exchange and Behavior / [ed] Elza Dunkels, Gun-Marie Frånberg, and Camilla Hällgren, ed., Hershey, PA: Information Science Reference , 2011, no 1, p. 222-239Chapter in book (Other academic)
    Abstract [en]

    Imagine 120 students sharing 5 computers, yet feeling that they are part of an interconnected world. This is the social context framing digital learning for African art students, the material limitations and cultural imaginations of which this chapter is concerned with. Based on extensive ethnographic engagements at TaSUBa, a national institute for arts and culture in Tanzania, this chapter investigates the development of digital media skills. Using the concept of digital learning to cover the acquisition of ICT skills as well as the use of ICT as a learning tool, the analysis spans from early expectations of connectivity to current forms of media engagement. Focusing on the social and cultural aspects of digital learning, the concept hybrid media engagement is introduced to capture the creative ways in which African art students overcome limitations in infrastructure, while exploring new forms of cultural production.

  • 2914.
    Uimonen, Paula
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Digital Drama: Teaching and Learning Art and Media in Tanzania2012Book (Other academic)
    Abstract [en]

    The aim of this book is to explore digital media and intercultural interaction at an arts college in Tanzania through innovative forms of ethnographic representation. The book and the series website weave together visual and aural narratives, interviews and observations, life stories and video documentaries, art performances and productions. It paints a vivid portrayal of everyday life in East Africa's only institute for practical art training, while tracing the rich cultural history of a state that has mixed tribalism, nationalism, Pan-Africanism, and cosmopolitanism in astonishingly creative ways. While following the anthropological tradition of thick description, Digital Drama employs a more artistic and accessible style of writing. Dramatic, ethnographic details are interspersed with theoretical postulations to explain and make sense of the unfolding narratives. The accompanying website visualizes and sensualizes the stories narrated in the book, unfolding a dramatic world of African dance, music, theater, and digital culture.

  • 2915.
    Uimonen, Paula
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Social and Mobile Media in ICT4D2012In: Social Media in Development Cooperation: Ørecomm - Centre for Communication and Glocal Change / [ed] Ricky Storm Braskov, Malmö: Ørecomm at Malmö University and Roskilde University , 2012, p. 20-28Conference paper (Refereed)
    Abstract [en]

    Can Facebook, Twitter, and mobile phones change the world? Obviously not! But there is something to be said for social networking sites, online news feeds, and mobile communication when it comes to ICT for Development (ICT4D). This paper will identify some key features of social and mobile media and relate these to social and political change, while paying attention to global patterns of digital stratification. Spider-supported projects that aim to use blogs and mobile phones in the fight against corruption in Africa will be used to illustrate and concretize opportunities as well as challenges. Reflections on how a networked organization like Spider can benefit from social media will be combined with a self-critical assessment of some pitfalls involved.

  • 2916.
    Uimonen, Paula
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Visual identity in Facebook2013In: Visual Studies, ISSN 1472-586X, E-ISSN 1472-5878, Vol. 28, no 2, p. 122-135Article in journal (Refereed)
    Abstract [en]

    Seeing your friends in Facebook has become a common means of social interaction, illustrating a visual turn in digital media in general and social media in particular. This article explores visual identity in Facebook, focusing on the use of profile photographs in the performance of digitally mediated selfhood. In Facebook, relationships are increasingly communicated through images, thus rendering the interactive reflexivity of performance rather visible. Based on the profile photographs of students at an arts college in Tanzania, the article discusses the construction of cultural identities through visual communication. By visually expressing their selves through profile photographs, users engage in the social construction of reality, crafting their digitally mediated identities in interaction with their online social relations. The online performance of selfhood is analysed in the context of offline social and material realities, to underline cultural aspirations for global inclusion. Building on anthropological readings of performance, the concept of social aesthetic frame is introduced to capture patterns of digital stratification that encompass the online construction of networked selfhood in the peripheries of the global network society. The article builds on anthropological research on digital media and intercultural interaction at a national arts institute in Tanzania, using a combination of digital, sensory and visual research methods.

  • 2917.
    Uimonen, Paula
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Social Anthropology.
    Hellström, Johan
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    ICT4D Donor Agencies and Networks2015In: The International Encyclopedia of Digital Communication and Society; 1: A - K / [ed] Robin Mansell and Peng Hwa Ang, Chichester: Wiley-Blackwell, 2015, 1, p. 1-9Chapter in book (Refereed)
    Abstract [en]

    Information and communication technology for development (ICT4D) evolved as a field of development cooperation in conjunction with the World Summit on the Information Society (WSIS) in 2003 and 2005. Prior to this United Nations summit, few donors were involved in ICT4D, but as policymakers around the world became involved in the WSIS process, ICT4D emerged as an important aspect of the global development agenda. Donors started to recognize that ICT offered a tool for development, not least for the achievement of the Millennium Development Goals (MDGs). After the WSIS interest dwindled among leading donor agencies, but resurfaced as mobile technologies became widespread even in income-poor countries and among poor populations and after the digitally mediated social uprisings of the so-called Arab Spring which highlighted the social and political significance of the internet. New actors are becoming involved including philanthropic organizations, while the ICT4D field continues to explore new working methods like multistakeholder partnerships. Meanwhile, ICT is gradually becoming integrated into development efforts, although global patterns of digital stratification still remain to be overcome. This entry focuses on the roles of donor organizations and their networks

  • 2918.
    ul Muntaha, Sidrat
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Skeppstedt, Maria
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Kvist, Maria
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Dalianis, Hercules
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Entity Recognition of Pharmaceutical Drugs in Swedish Clinical Text2012In: Proceedings of the Conference, 2012, p. 77-78Conference paper (Refereed)
    Abstract [en]

    An entity recognition system for expressions of pharmaceutical drugs, based on vocabulary lists from FASS, the Medical Subject Headings and SNOMED~CT, achieved a precision of 94\% and a recall of 74\% when evaluated on assessment texts from Swedish emergency unit health records.

  • 2919.
    Uppström, Elin
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Designing, Theorizing, and Reflecting on Information Systems Artifacts and Value Co-Creation in e-Government2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    E-government services in the form of information systems (IS) artifacts create a new arena for co-creation that governments aim to leverage. Design of and knowledge about IS artifacts in value co-creation in e-government can thereby be considered valuable for the future development of e-government. How IS artifacts are used in value co-creation and co-destruction and how the artifacts are developed is however not well understood.

    This thesis addresses the problem of how to design for and understand value co-creation in e-government. To address the problem stated, three research questions are posed. (i) How can IS artifacts be designed to enable value co-creation in e-government and what aspects can inhibit value being co-created through the designed artifacts? (ii) How can boundary object theory facilitate the understanding of IS artifacts used in value co-creation and co-destruction in e-government? (iii) How can retrospectives in design science contribute to research on value co-creation in e-government?

    Two artifacts in the form of instantiations are designed and evaluated. Design science research methodology is used in two different projects at Swedish municipalities. Secondary analysis is used to identify aspects that inhibit value being co-created through the designed IS artifacts. From these inhibitors, core aspects for public value co-creation are derived. Thereafter, this thesis delves further into how IS artifacts are used in collaborations between citizens, private businesses, and government agencies in order to co-create value. Two case studies are carried out at Swedish government agencies and sociomaterial boundary object theory is used to enhance understanding. The thesis research process ends with a retrospective evaluation of the performed research, using critical realism as its philosophical foundation and guidance.

    The result includes one configurable process model that enables value co-creation by facilitating shared understanding between collaborating parties; one mobile service that enables value co-creation through citizen sourcing; aspects that inhibit the realization of co-created value; and four core aspects that need to be considered when designing artifacts for value co-creation. That IS artifacts can be regarded as boundary objects when you aim to study and understand value co-creation and co-destruction between communities in e-government. Descriptions of how IS artifacts, viewed as sociomaterial boundary objects, are used in value co-creation processes between governments, citizens, and businesses and outcomes in terms of value co-creation and co-destruction. The benefit of performing critical realism-guided retrospectives in design science in order to complement prescriptive knowledge with explanatory and critical knowledge is motivated. It is showed that the design of artifacts generates knowledge through the design efforts, regardless of whether they also yield utility.

    This thesis contributes to e-government research and practice with knowledge on how to design artifacts that enable value co-creation. Establishes sociomaterial boundary object theory as a theoretical lens that offers a tool to evaluate and design IS artifacts that enable value co-creation and with knowledge on how IS artifacts are used in value co-creation. The thesis also motivates the usefulness of retrospective evaluation in design science. Suggestions for future research include further developing design science retrospectives. 

  • 2920.
    Uppström, Elin
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Re-Visiting IS Design Science Artifacts: Making a Case for Critical Realism2017In: Proceedings of the 50th Hawaii International Conference on System Sciences (HICSS 2017), 2017, p. 4675-4684Conference paper (Refereed)
    Abstract [en]

    In this paper critical realism is suggested as a suitable philosophical assumption to guide a separate, stand-alone retrospective evaluation of design science projects and artifacts. A main contribution of the paper is to argue that knowledge can be gained in retrospective evaluations of design science projects regardless of the success or nonsuccess of the project itself. Thereby, retrospective evaluation complements current evaluations that are mostly means-end focused. The argumentation is supported through re-visiting two e-government design science projects, which can be considered both as failures and successes depending on the framing. Critical realism puts focus on knowing through making and widens the use of design science in areas where utility is not the main goal. Future research should focus on providing more details on how a critical realism retrospective in design science should be carried out.

  • 2921.
    Uppström, Elin
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    The Promise of Public Value Co-Creation in Open Government: Designing IT Services for Open Government and Public Value Co-Creation2014Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    The engagement of citizens in governmental actives is the future of publicsector reforms. The private sector has already started to leverage onlinetechnology to innovate and to reinvent businesses. The move towards servicesexchange instead of goods exchange is making producers, providersand users cooperate to recognize and exploit value co-creation opportunities.The degree to which collective intelligence is leveraged could be correlatedto the value an initiative generates in the public sector. Thereby open governmentimplies a focus on value co-creation in the public sector. This thesisargues that an important purpose of opening up governments towards citizensand private business is to leverage the potential of value co-creation in asimilar fashion to that already being explored in the private sector. To explorethis phenomenon this thesis addresses the following research question:How can local government use IT services to become more open and leveragethe potential of public value co-creation?Utilizing a design science approach with interpretive philosophical assumptions,the thesis contributes to knowledge on open government and value cocreationby designing artifacts that support open government in the form ofe- and m-services. It also investigates inhibitors of public value co-creationthat may arise from the design of the artifacts.

  • 2922.
    Uppström, Elin
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Lönn, Carl-Mikael
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Explaining value co-creation and co-destruction in e-government using boundary object theory2017In: Government Information Quarterly, ISSN 0740-624X, E-ISSN 1872-9517, Vol. 34, no 3, p. 406-420Article in journal (Refereed)
    Abstract [en]

    This article contributes to the understanding of e-government collaboration, value co-creation and co-destruction when using information systems (IS) artifacts. This is achieved through case study research, based on collaborations between the Swedish Forest Agency and external communities that were intended to co-create value. The collaborations were supported by an IS environment, comprising two IS artifacts that has been in use for several years. The analysis was based on sociomaterial boundary object theory. The philosophical framework underpinning the investigation of the interplay between technological and social aspects of the IS-enabled co-creation processes, i.e. the collaborations, was critical realism. The purpose of this article is, therefore, to analyze the co-creation processes supported by the IS artifacts (viewed as boundary objects) and to consider the outcomes, in terms of value co-creation and co-destruction, of the collaborations.The results show that value is both co-created and co-destroyed in the collaborative processes. The main conclusions are: (i) it is difficult to define value co-creation and co-destruction when the boundaries between collaborating communities are complex; (ii) when boundaries are complex, collaboration requires complex IS artifacts; (iii) the risk of co-destruction outcomes increases with boundary complexity. Finally, the article demonstrates that sociomaterial boundary objects provide a suitable theoretical framework for investigations of value co-creation and co-destruction through IS artifacts in e-government.

  • 2923.
    Uppström, Elin
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Lönn, Carl-Mikael
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    The Promise of a Crowd2013In: AMCIS 2013 Proceedings, Association for Information Systems, 2013Conference paper (Refereed)
    Abstract [en]

    This paper presents an evaluation of a mobile complaint and problem-reporting solution made for Swedish municipalities and their citizens. The evaluation is made through a government 2.0 framework to assess the appropriateness of the initiative as a citizen-sourcing solution. The research approach consists of a secondary analysis of empirical data. The researchers have been active participants in gathering the data for the secondary analysis. The results show that although the promise of the crowd is very prominent in the technical platform, municipalities are not prepared to fully utilize the citizen-sourcing solution. The main contribution for research is a widening of the body of knowledge regarding citizen-sourcing by an empirical application of a previously developed theoretical citizen-sourcing framework. The paper contributes to society and practice through highlighting difficulties that can be expected when realizing the promise of the crowd.

  • 2924.
    Uppström, Elin
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Lönn, Carl-Mikael
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Hoffsten, Madeleine
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Thorström, Joakim
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    New Implications for Customization of ERP Systems2015In: Proceedings of the 48th Annual Hawaii International Conference on System Sciences (HICSS 2015) / [ed] Tung X. Bui, Ralph H. Sprague, Jr. Los Alamitos,, IEEE Computer Society, 2015, p. 4220-4229Conference paper (Refereed)
    Abstract [en]

    Enterprise Resource Planning (ERP) Systems are standardized software packages intended to support the majority or all of an organization's processes. Customization of an ERP system is usually required to achieve fit between system and business processes of an organization. Customization options ranges from setting parameters in the system to developing new functionality by modifying source code. Models describing customization options are a decade old. Since then, the trend is for ERP systems to become more flexible. The feasibility of customization is facilitated and new options for customization are made available. Through in depth interviews, this research identifies a need for revising existing models. Presents necessary changes and proposes new customization options that should be included in a new model. There is also a need for customization models for different types of ERP systems. This paper therefore also contributes with describing how customization of cloud ERP relates to existing models.

  • 2925.
    Uppström, Elin
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Nilsson, Andreas
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Modeling IT-mediated value encounters between citizens and local government2012Conference paper (Refereed)
    Abstract [en]

    Cocreation of value in inter-organizational contexts is an increasingly common phenomenon. There is a lack of empirically grounded research regarding value cocreation in social contexts where meetings are mediated by IT. Through a case study of a e-government project, cocreation between citizens and local government is explored. The value encounter model is used as a tool for modeling cocreation. Results show that the model is able to capture significant cocreation activities, but miss some of the key values from the IT-system. The study recommends future research towards complementing the value encounter model with an “IT-object” and recommend investigating the Platform as a service field for inspiration.

  • 2926. van der Aalst, Wil M. P.
    et al.
    Bichler, Martin
    Zdravkovic, Jelena
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Views on the Past, Present, and Future of Business and Information Systems Engineering2018In: Business & Information Systems Engineering, ISSN 1867-0202, Vol. 60, no 6, p. 443-477Article in journal (Refereed)
    Abstract [en]

    “The times they are a-changin,” a famous song title by Bob Dylan, also applies to our profession and our subject of study. Information technology has always been a driver for innovation. The recent years, however, have seen IT-based innovations that truly impact everybody’s lives. Everything that can be digitized will be digitized, and this trend is continuing at an amazing speed. For a discipline that looks at the design and utilization of information systems these are exciting times. Yet, it is also a time full of challenges. While our discipline has much to contribute, it competes with other disciplines for topics and ideas. Also, the scope of topics studied has become broader and broader, and so have our methods. While initial work in Business and Information Systems Engineering (BISE) was often rooted in artificial intelligence, database systems, or operations research, the community has adopted new approaches to address new types of problems. Nowadays, we also have a strong group of academics working primarily with empirical methods or methods from microeconomics, to name just a few. This development towards a more multi-paradigmatic discipline also had its challenges and there were controversial discussions along the way.

  • 2927. van der Torre, Leon
    et al.
    Verhagen, Harko
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Normative Multiagent Systems2004Other (Other (popular science, discussion, etc.))
  • 2928.
    Van Gemert-Pijnen, Lisette
    et al.
    University of Twente - Enschede, The Netherlands, , .
    Hettinga, MarikeWindesheim University of Applied Sciences, The Netherlands, , .Smedberg, ÅsaStockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    eTELEMED 2014, The Sixth International Conference on eHealth, Telemedicine, and Social Medicine2014Conference proceedings (editor) (Other (popular science, discussion, etc.))
  • 2929.
    Vargas Chevez, Norman Antonio
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Johannesson, Paul
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Rusu, Lazar
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    A unified strategic business and IT alignment model: A study in the public universities of Nicaragua2010In: 16th Americas Conference on Information Systems (AMCIS 2010), AISeL , 2010Conference paper (Other academic)
  • 2930.
    Vargas Chevez, Norman Antonio
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Plazaola, Leonel
    Una representación consolidada del alineamiento estratégico de los negocios y las tecnologías de la información2007In: Nexo, ISSN 1818-6742, E-ISSN 1995-9516, Nexo, Vol. 20Article in journal (Other academic)
  • 2931.
    Vargas Chevez, Norman Antonio
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Plazaola, Leonel
    Ekstedt, Mathias
    A consolidated strategic business and IT alignment representation: A framework aggregated from literature2008In: Proceedings of the 41st Hawaii International Conference on System Sciences - 2008, 2008Conference paper (Refereed)
  • 2932.
    Velupillai, Sumithra
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Automatic Classification of Factuality Levels: A Case Study on Swedish Diagnoses and the Impact of Local Context2011In: The Fourth International Symposium on Languages in Biology and Medicine, Singapore, 2011Conference paper (Refereed)
    Abstract [en]

    Clinicians express different levels of knowledge certainty when reasoning about a patient’s status. Automatic extraction of relevant information is crucial in the clinical setting, which means that factuality levels need to be distinguished. We present an automatic classifier using Conditional Random Fields, which is trained and tested on a Swedish clinical corpus annotated for factuality levels at a diagnosis statement level: the Stockholm EPR Diagnosis-Factuality Corpus. The classifier obtains promising results (best overall results are 0.699 average F-measure using all classes, 0.762 F-measure using merged classes), using simple local context features. Preceding context is more useful than posterior, although best results are obtained using a window size of +/-4. Lower levels of certainty are more problematic than higher levels, which was also the case for the human annotators in creating the corpus. A manual error analysis shows that conjunctions and other higher-level features are common sources of errors.

  • 2933.
    Velupillai, Sumithra
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Semantic Annotations in Clinical Documentation: Exploring Potentials for Future Information Retrieval2010In: ESAIR '10 Proceedings of the third workshop on Exploiting semantic annotations in information retrieval, New York: ACM Press, 2010, p. 9-10Conference paper (Other academic)
  • 2934.
    Velupillai, Sumithra
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Shades of Certainty: Annotation and Classification of Swedish Medical Records2012Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Access to information is fundamental in health care. This thesis presents research on Swedish medical records with the overall goal of building intelligent information access tools that can aid health personnel, researchers and other professions in their daily work, and, ultimately, improve health care in general.

    The issue of ethics and identifiable information is addressed by creating an annotated gold standard corpus and porting an existing de-identification system to Swedish from English. The aim is to move towards making textual resources available to researchers without risking exposure of patients’ confidential information. Results for the rule-based system are not encouraging, but results for the gold standard are fairly high.

    Affirmed, uncertain and negated information needs to be distinguished when building accurate information extraction tools. Annotation models are created, with the aim of building automated systems. One model distinguishes certain and uncertain sentences, and is applied on medical records from several clinical departments. In a second model, two polarities and three levels of certainty are applied on diagnostic statements from an emergency department. Overall results are promising. Differences are seen depending on clinical practice, annotation task and level of domain expertise among the annotators.

    Using annotated resources for automatic classification is studied. Encouraging overall results using local context information are obtained. The fine-grained certainty levels are used for building classifiers for real-world e-health scenarios.

    This thesis contributes two annotation models of certainty and one of identifiable information, applied on Swedish medical records. A deeper understanding of the language use linked to conveying certainty levels is gained. Three annotated resources that can be used for further research have been created, and implications for automated systems are presented.

  • 2935.
    Velupillai, Sumithra
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Swedish Health Data - Information Access and Representation2009Other (Other (popular science, discussion, etc.))
  • 2936.
    Velupillai, Sumithra
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Temporal Expressions in Swedish Medical Text - A Pilot Study2014In: Proceedings of BioNLP 2014: Workshop on Biomedical Natural Language Processing, Stroudsburg: Association for Computational Linguistics, 2014, p. 88-92Conference paper (Refereed)
  • 2937.
    Velupillai, Sumithra
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Towards A Better Understanding of Uncertainties and Speculations in Swedish Clinical Text – Analysis of an Initial Annotation Trial2010In: Proceedings of the Workshop on Negation and Speculation in Natural Language Processing, University of Antwerpen , 2010, p. 14-22Conference paper (Other academic)
    Abstract [en]

    In view of the increasing need to facilitate processing the content of scientific papers, we present an annotation scheme for annotating full papers with zones of conceptualisation, reflecting the information structure and knowledge types which constitute a scientific investigation. The latter are the Core Scientific Concepts (CoreSCs) and include Hypothesis, Motivation, Goal, Object, Background, Method, Experiment, Model, Observation, Result and Conclusion. The CoreSC scheme has been used to annotate a corpus of 265 full papers in physical chemistry and biochemistry and we are currently automating the recognition of CoreSCs in papers. We discuss how the CoreSC scheme relates to other views of scientific papers and indeed how the former could be used to help identify negation and speculation in scientific texts.

  • 2938.
    Velupillai, Sumithra
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Dalianis, Hercules
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Automatic Construction of Domain-specific Dictionaries on Sparse Parallel Corpora in the Nordic languages2008In: Workshop MMIES-2: Multi-source, Multilingual Information Extraction and Summarization, Held in conjunction with COLING-2008, 2008Conference paper (Refereed)
  • 2939.
    Velupillai, Sumithra
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Dalianis, Hercules
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Duneld, Martin
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Diagnosing Diagnoses in Swedish Clinical Records2008In: 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 , 2008Conference paper (Refereed)
  • 2940.
    Velupillai, Sumithra
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Dalianis, Hercules
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Hassel, Martin
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    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 trial2009In: International Journal of Medical Informatics, ISSN 1386-5056, E-ISSN 1872-8243, Vol. 78, no 12, p. e19-e26Article in journal (Refereed)
    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.

  • 2941.
    Velupillai, Sumithra
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Dalianis, Hercules
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Kvist, Maria
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Factuality Levels of Diagnoses in Swedish Clinical Text2011In: User Centred Networked Health Care - Proceedings of MIE 2011 / [ed] Anne Moen, Stig Kjær Andersen, Jos Aarts, Petter Hurlen, 2011, p. 559-563Conference paper (Refereed)
    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.

  • 2942.
    Velupillai, Sumithra
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Duneld, Martin
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Dalianis, Hercules
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Automatic Dictionary Construction and Identification of Parallel Text Pairs2008In: Proceedings of the International Symposium on Using Corpora in Contrastive and Translation Studies (UCCTS), 2008Conference paper (Refereed)
  • 2943.
    Velupillai, Sumithra
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Duneld, MartinStockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.Henriksson, AronStockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.Kvist, MariaStockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.Skeppstedt, MariaStockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.Dalianis, HerculesStockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Louhi 2014: Special issue on health text mining and information analysis2015Conference proceedings (editor) (Refereed)
  • 2944.
    Velupillai, Sumithra
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Duneld, Martin
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Henriksson, Aron
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Kvist, Maria
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Skeppstedt, Maria
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Dalianis, Hercules
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Louhi 2014: Special issue on health text mining and information analysis: introduction2015In: BMC Medical Informatics and Decision Making, ISSN 1472-6947, E-ISSN 1472-6947, Vol. 2, no SI, p. 1-3Article in journal (Refereed)
  • 2945.
    Velupillai, Sumithra
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Hassel, Martin
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Dalianis, Hercules
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Finding the Parallel: Automatic Dictionary Construction and Identification of Parallel Text Pairs2010In: Using Corpora in Contrastive and Translation Studies / [ed] edited by Richard Xiao, Newcastle: Cambridge Scholars Publishing , 2010Chapter in book (Other academic)
  • 2946.
    Velupillai, Sumithra
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Ibrahim, Omran
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Kvist, Maria
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences. Karolinska Institute, Sweden.
    Functions for personal health records in Sweden – patient perspectives2013In: Scandinavian Conference on Health Informatics 2013: Copenhagen, Denmark, August 20, 2013 / [ed] Gustav Bellika et al., Linköping: Linköping University Press , 2013, p. 95-95Conference paper (Refereed)
    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?”.

  • 2947.
    Velupillai, Sumithra
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Kvist, Maria
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Fine-grained Certainty Level Annotations Used for Coarser-grained E-health Scenarios: Certainty Classication of Diagnostic Statements in Swedish Clinical Text2012In: 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, p. 450-461Conference paper (Refereed)
    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).

  • 2948.
    Velupillai, Sumithra
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences. University of Utah, USA.
    Mowery, Danielle L.
    Abdelrahman, Samir
    Christensen, Lee
    Chapman, Wendy W.
    BluLab: Temporal Information Extraction for the 2015 Clinical TempEval Challenge2015In: Proceedings of the 9th International Workshop on Semantic Evaluation (SemEval 2015), Association for Computational Linguistics, 2015, p. 815-819Conference paper (Refereed)
    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.

  • 2949.
    Velupillai, Sumithra
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Mowery, Danielle L.
    South, Brett R.
    Kvist, Maria
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences. Karolinska Institutet, Sweden.
    Dalianis, Hercules
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Recent Advances in Clinical Natural Language Processing in Support of Semantic Analysis2015In: IMIA Yearbook of Medical Informatics, ISSN 0943-4747, Vol. 10, no 1, p. 183-193Article in journal (Refereed)
    Abstract [en]

    Objectives

    We present a review of recent advances in clinical Natural Language Processing (NLP), with a focus on semantic analysis and key subtasks that support such analysis.

    Methods

    We conducted a literature review of clinical NLP research from 2008 to 2014, emphasizing recent publications (2012-2014), based on PubMed and ACL proceedings as well as relevant referenced publications from the included papers.

    Results

    Significant articles published within this time-span were included and are discussed from the perspective of semantic analysis. Three key clinical NLP subtasks that enable such analysis were identified: 1) developing more efficient methods for corpus creation (annotation and de-identification), 2) generating building blocks for extracting meaning (morphological, syntactic, and semantic subtasks), and 3) leveraging NLP for clinical utility (NLP applications and infrastructure for clinical use cases). Finally, we provide a reflection upon most recent developments and potential areas of future NLP development and applications.

    Conclusions

    There has been an increase of advances within key NLP subtasks that support semantic analysis. Performance of NLP semantic analysis is, in many cases, close to that of agreement between humans. The creation and release of corpora annotated with complex semantic information models has greatly supported the development of new tools and approaches. Research on non-English languages is continuously growing. NLP methods have sometimes been successfully employed in real-world clinical tasks. However, there is still a gap between the development of advanced resources and their utilization in clinical settings. A plethora of new clinical use cases are emerging due to established health care initiatives and additional patient-generated sources through the extensive use of social media and other devices.

  • 2950.
    Velupillai, Sumithra
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Skeppstedt, Maria
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Kvist, Maria
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences. Karolinska Institutet, Sweden.
    Mowery, Danielle
    Chapman, Brian E.
    Dalianis, Hercules
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Chapman, Wendy W.
    Cue-based assertion classification for Swedish clinical text-Developing a lexicon for pyConTextSwe2014In: Artificial Intelligence in Medicine, ISSN 0933-3657, E-ISSN 1873-2860, Vol. 61, no 3, p. 137-144Article in journal (Refereed)
    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.

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