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Koldijk, S.J. (author), Sappelli, M. (author), Neerincx, M.A. (author), Kraaij, W. (author)In our connected workplaces it can be hard to work calm and focused. In a simulated work environment we manipulated the stressors time pressure and email interruptions. We found effects on subjective experience and working behavior. Initial results indicate that the sensor data that we collected is suitable for user state modeling in stress...bookPart 2013
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Fuhr, N. (author), Kamps, J. (author), Kraaij, W. (author), Verberne, S. (author)This paper reports on the fourth Information Interaction in Context (IIiX) Symposium held in Nijmegen, the Netherlands in August 2012. It featured a lively program with 3 keynotes, 25 long papers with oral presentation, 20 short papers with poster presentation, a doctoral consortium, a workshop on human-computer information retrieval, and was...article 2013
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Verberne, S. (author), Sappelli, M. (author), Kraaij, W. (author)We compared three term scoring methods in their ability to extract descriptive terms from a knowledge worker's document collection. We compared the methods in two different evaluation scenarios, both from the perspective of the user: a perterm evaluation, and a holistic (term cloud) evaluation. We found that users tend to prefer a term scoring...conference paper 2013
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Oomen, J. (author), Over, P. (author), Kraaij, W. (author), Smeaton, A.F. (author)Audiovisual archives are investing in large-scale digitization efforts of their analogue holdings and, in parallel, ingesting an ever-increasing amount of born-digital files in their digital storage facilities. Digitization opens up new access paradigms and boosted re-use of audiovisual content. Query-log analyses show the shortcomings of manual...article 2013
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Over, P. (author), Fiscus, J. (author), Sanders, G. (author), Shaw, B. (author), Michel, M. (author), Awad, G. (author), Smeaton, A.F. (author), Kraaij, W. (author), Quénot, G. (author)The TREC Video Retrieval Evaluation (TRECVID) 2012 was a TREC-style video analysis and retrieval evaluation, the goal of which remains to promote progress in content-based exploitation of digital video via open, metrics-based evaluation. Over the last ten years this effort has yielded a better understanding of how systems can effectively...conference paper 2013
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- Over, P. (author), Fiscus, J. (author), Sanders, G. (author), Michel, M. (author), Awad, G. (author), Smeaton, A.F. (author), Kraaij, W. (author), Quénot, G. (author) conference paper 2013
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Schutte, K. (author), Bomhof, F.W. (author), Burghouts, G.J. (author), van Diggelen, J. (author), Hiemstra, P. (author), van 't Hof, J. (author), Kraaij, W. (author), Pasman, K.H.W. (author), Smith, A.J.E. (author), Versloot, C.A. (author), de Wit, J.J. (author)More and more sensors are getting Internet connected. Examples are cameras on cell phones, CCTV cameras for traffic control as well as dedicated security and defense sensor systems. Due to the steadily increasing data volume, human exploitation of all this sensor data is impossible for effective mission execution. Smart access to all sensor data...conference paper 2013
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de Boer, M.H.T. (author), Schutte, K. (author), Kraaij, W. (author)The semantic gap is one of the challenges in the GOOSE project. In this paper a Semantic Event Classification (SEC) system is proposed as an initial step in tackling the semantic gap challenge in the GOOSE project. This system uses semantic text analysis, multiple feature detectors using the BoW model, SVM-based concept classifiers, event...conference paper 2013
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Bouma, H. (author), Azzopardi, G. (author), Spitters, M.M. (author), de Wit, J.J. (author), Versloot, C.A. (author), van der Zon, R.W.L. (author), Eendebak, P.T. (author), Baan, J. (author), ten Hove, R.J.M. (author), van Eekeren, A.W.M. (author), ter Haar, F.B. (author), den Hollander, R.J.M. (author), van Huis, R.J. (author), de Boer, M.H.T. (author), van Antwerpen, G. (author), Broekhuijsen, B.J. (author), Daniele, L.M. (author), Brandt, P. (author), Schavemaker, J.G.M. (author), Kraaij, W. (author), Schutte, K. (author)We describe the TNO system and the evaluation results for TRECVID 2013 Multimedia Event Detection (MED) and instance search (INS) tasks. The MED system consists of a bag-of-word (BOW) approach with spatial tiling that uses low-level static and dynamic visual features, an audio feature and high-level concepts. Automatic speech recognition (ASR)...conference paper 2013
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Sappelli, M. (author), Verberne, S. (author), Kraaij, W. (author)Knowledge workers need support in their daily activities to handle the information stream they encounter continuously (e.g. e-mail, search results etc.). One method for this is to place the information in context, i.e. to what activity is the information related? For this purpose, contexts need to be recognized. Additionally, this should happen...conference paper 2012
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- Larson, M. (author), de Jong, F. (author), Kraaij, W. (author), Renals, S. (author) article 2012
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- van Erp, J.B.F. (author), van den Broek, E.L. (author), Schavemaker, J.G.M. (author), Kranenborg, K. (author), de Penning, H.L.H. (author), Blanson Henkemans, O.A. (author), van Tilburg, M.W.T. (author), Bierman, E.B.P. (author), van der Meulen, F.A. (author), Papp, Z. (author), van den Haak, W.P. (author), van Diggelen, J. (author), Janssen, J.B. (author), Witberg, R.R. (author), Kraaij, W. (author) report 2012
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Koldijk, S.J. (author), Neerincx, M.A. (author), Kraaij, W. (author)Imagine a typical working day of a knowledge worker, i.e. someone who is predominantly concerned with interpreting and generating information. Bob gets into the office at 9, starts up his computer, takes a look at his mails and calendar and plans what things he has to do this day. Then he starts working on one of the important tasks that have to...conference paper 2012
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Koldijk, S.J. (author), van Staalduinen, M. (author), Neerincx, M.A. (author), Kraaij, W. (author)Motivation– Supporting knowledge workers in their self-management by providing them overviews of performed tasks.Research approach– Computer interaction data of knowledge workers was logged during their work. For each user different classifiers were trained and compared on their performance on recognizing 12 specified tasks.Findings/Design–...conference paper 2012
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Over, P. (author), Awad, G. (author), Fiscus, J. (author), Antonishek, B. (author), Michel, M. (author), Smeaton, A.F. (author), Kraaij, W. (author), Quénot, G. (author)The TREC Video Retrieval Evaluation (TRECVID) 2011 was a TREC-style video analysis and retrieval evaluation, the goal of which remains to promote progress in content-based exploitation of digital video via open, metrics-based evaluation. Over the last ten years this effort has yielded a better understanding of how systems can effectively...conference paper 2012
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- Over, P. (author), Awad, G. (author), Buckland, L. (author), Dimmick, D. (author), Fiscus, J. (author), Joy, D. (author), Sanders, G. (author), Shaw, B. (author), Michel, M. (author), Smeaton, A. (author), Kraaij, W. (author), Quénot, G. (author), Strassel, S. (author), Morris, A. (author) conference paper 2012
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Schavemaker, J.G.M. (author), Versloot, C.A. (author), de Wit, J.J. (author), Kraaij, W. (author)The TNO instance search submission to TRECVID 2012 consisted of four different runs: two are using an exhaustive SIFT key-point search, and two are using an extended bag-of-visual-words approach.conference paper 2012
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- Kraaij, W. (author), Over, P. (author) conference paper 2012
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- Gurrin, C. (author), Clough, P. (author), Jones, G.J.F. (author), Kraaij, W. (author), Murdoch, V. (author) conference paper 2011
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- Kraaij, W. (author), Awad, G. (author) conference paper 2011