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7. A model of the human smooth pursuit system based on an unsupervised adaptive controller

Author

Koken, Phil W., Jonker, Harm J.J., and Erkelens, Casper J.

Subjects
Visual perception -- Models, Motion perception (Vision) -- Models, Eye -- Movements
Abstract

A first attempt was made, on the basis of Pavel's proposal [18], to integrate a predictive mechanism into a model of the human smooth pursuit system. The predictive mechanism contained an adaptive filter based on the LMS algorithm. Smooth pursuit simulations were made of a large variety of target movements. The model provides a fairly good qualitative and mostly also a fairly good quantitative description of human tracking of the various stimuli. However, when the model was applied to the tracking of sinusoidal target movements with frequencies higher than about 1 Hz, it performed even better than the human smooth pursuit system.

Published
1996

10. Contributors

Author

Accardo, Agostino P., primary, Aiple, Franz, additional, Anderson, Tim, additional, Antonini, Riccardo, additional, Barnes, Graham R., additional, Beltrami, Giorgio, additional, Benassi, Carlo, additional, Bengelsdorf, Herbert, additional, Bergamaschi, Roberto, additional, Berthoz, Alain, additional, Paolo Biral, Gian, additional, Bonaventure, Nicole, additional, Bour, Lo J., additional, Braun, Doris, additional, Bruni, Rosa, additional, Callieco, Roberto, additional, Capocchi, Giuseppe, additional, Carmody, Dennis P., additional, Chekaluk, Eugene, additional, Cheron, Guy, additional, Citterio, Antonietta, additional, Tinsley Coble, E., additional, Corazza, Ruggero, additional, Cosi, Vittorio, additional, Crawford, Trevor J., additional, Da Pozzo, Stefano, additional, Dassonville, Paul, additional, De Angelis, Claudio, additional, dell'Aquila, Teresa, additional, Della Torre, Giovannella, additional, Draicchio, Francesco, additional, Duysens, Jacques, additional, d'Ydewalle, Géry, additional, Eadie, Andrew S., additional, Erkelens, Casper J., additional, Errico, Pierangelo, additional, Farrace, Stefano, additional, Ferraresi, Aldo, additional, Fetter, Michael, additional, Findlay, John M., additional, Fischer, Burkhart, additional, Flach, Frederich, additional, Fuchs, Albert F., additional, Galiana, Henrietta L., additional, Godaux, Emile, additional, Grassi, Silvarosa, additional, Grealy, Madeleine A., additional, Guitton, Daniel, additional, Harding, Anita E., additional, Heron, Gordon, additional, Hohnsbein, Joachim, additional, Horii, Ken, additional, Inchingolo, Paolo, additional, Israël, Isabelle, additional, Jagla, Fedor, additional, Jardon, Blandine, additional, Jüttner, Martin, additional, Kaplan, Melvin, additional, Kennard, Christopher, additional, Kim, Myoung-Soon, additional, Koenig, Eberhard, additional, Koken, Phil W., additional, Lefèvre, Philippe, additional, Ling, Leo, additional, Llewellyn, Keith R., additional, Lueck, Christian J., additional, Lui, Fausta, additional, Mateeff, Stefan, additional, Mergner, Thomas, additional, Mettens, Philippe, additional, Mossman, Stuart S., additional, de Visser, Bram W. Ongerboer, additional, Orlowski, Barbara, additional, Paré, Martin, additional, Pensiero, Stefano, additional, Perissutti, Paolo, additional, Pettorossi, Vito Enrico, additional, Phillips, James O., additional, Porcù, Silvio, additional, Pugh, John R., additional, Romani, Alfredo, additional, Roucoux, André, additional, Santarelli, Rosamaria, additional, Schlag, John, additional, Schlag-Rey, Madeleine, additional, Schweigart, Georg, additional, Spagno, Cinzia, additional, Speelman, Hans D., additional, Takeda, Mariko, additional, Tegetmeyer, Helmut, additional, Tweed, Douglas, additional, Uomori, Kenya, additional, Urbani, Luca, additional, van Gisbergen, Jan A.M., additional, Van Rensbergen, Johan, additional, van ′t Ent, Dennis, additional, Versino, Maurizio, additional, Waterston, John A., additional, Weber, Heike, additional, Wolf, Werner, additional, Wolzak, Adrie, additional, Worfolk†, Ralph, additional, Yakimoff, Naum, additional, Yamada, Mitsuho, additional, Yücel, Hasan Y., additional, Zambarbieri, Daniela, additional, Zampolini, Mauro, additional, and Zikmund, Vladislav, additional

Published
1994
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12. Interoperabiliteit in de radiotherapie in Nederland

Author

Wessel, Rogier H., Koken, Phil W., and Scheurleer, Jelle

Subjects
radiotherapie, interoperabiliteit
Abstract

Interoperabiliteit is het vermogen van informatiesystemen om samen te werken binnen en buiten de grenzen van de organisatie. Binnen de gezondheidszorg betreft het dan ondersteuning van een effectieve zorg. Vanwege de snelle technologische ontwikkelingen en de toenemende complexiteit van de communicatie is de verwachting dat aan interoperabiliteit gerelateerde problemen steeds zichtbaarder en merkbaarder worden. Dit is ook bij radiotherapie het geval. Daarnaast is in Nederland een trend gaande van radiotherapie afdelingen die groeien naar multi-locatie afdelingen. De voorbereidingen door de afdeling radiotherapie van het VUmc voor haar satellietlocatie waren de aanleiding om in 2010 te starten met een onderzoek naar interoperabiliteitsproblemen binnen het vakgebied radiotherapie. Hiervoor is een enquête gehouden onder alle afdelingen radiotherapie in Nederland. Meer informatie is verkregen door interviews op vier radiotherapie afdelingen. Op de afdeling radiotherapie van het VUmc is een casus studie uitgevoerd, waarbij de bedrijfsprocessen en informatiestromen werden gemodelleerd. Geïdentificeerde interoperabiliteitsproblemen zijn geanalyseerd en aanbevelingen ter verbetering zijn gedaan. De bevindingen zijn dat de technische interoperabiliteitsproblemen zeldzaam zijn en dat ze meestal op strategisch en semantisch niveau optreden, dat wil zeggen de eenduidigheid van de berichten structuur en de juiste interpretatie van van de informatie. Voor de afdeling radiotherapie van het VUmc zijn geen grote nieuwe interoperabiliteitsproblemen te verwachten in de groei naar een multi-locatie afdeling. Verwacht wordt dat de meeste problemen zullen worden gedekt door bestaande of toekomstige integratieprofielen van 'Integrating the Healthcare Enterprise'.

Published
2012

13. Patterns of long-term swallowing dysfunction after definitive radiotherapy or chemoradiation

Author

Christianen, Miranda E.M.C., primary, Verdonck-de Leeuw, Irma M., additional, Doornaert, Patricia, additional, Chouvalova, Olga, additional, Steenbakkers, Roel J.H.M., additional, Koken, Phil W., additional, René Leemans, C., additional, Oosting, Sjoukje F., additional, Roodenburg, Jan L.N., additional, van der Laan, Bernard F.A.M., additional, Slotman, Ben J., additional, Bijl, Hendrik P., additional, and Langendijk, Johannes A., additional

Published
2015
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15. A straightforward implantation method of radioactive sources by means of the Leksell frame

Author

Koken, Phil W., De Vos, Robert J., and Radiation Oncology

Abstract

Stereotactic brachytherapy of cerebral gliomas often involves insertion of catheters through the tumor bed. We adopted the hexagonal tube configuration around a central tube. Such a configuration is applicable to most commonly occurring brain tumors. In order to perform a low-cost, accurate and straightforward implantation, a robust mathematical derivation of all relevant formulas is used to transform CT coordinates to Leksell frame coordinates, including derivations for the two stereotactic angles. The coordinates of the seven tubes (which are essential if no template is available) and the length of the radioactive source are also derived, and an example is presented. The calculations have been implemented on a personal computer (Intel processor 386 or higher). Additional options, such as choosing other stereotactic angles than the calculated ones and rotating the tube configuration around the central tube, are integrated into the program.

Published
1996

16. Development of NTCP models for head and neck cancer patients treated with three-dimensional conformal radiotherapy for xerostomia and sticky saliva: The role of dosimetric and clinical factors

Author

Beetz, Ivo, primary, Schilstra, Cornelis, additional, Burlage, Fred R., additional, Koken, Phil W., additional, Doornaert, Patricia, additional, Bijl, Henk P., additional, Chouvalova, Olga, additional, Leemans, C. René, additional, de Bock, Geertruida H., additional, Christianen, Miranda E.M.C., additional, van der Laan, Bernard F.A.M., additional, Vissink, Arjan, additional, Steenbakkers, Roel J.H.M., additional, and Langendijk, Johannes A., additional

Published
2012
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17. Predictive modelling for swallowing dysfunction after primary (chemo)radiation: Results of a prospective observational study

Author

Christianen, Miranda E.M.C., primary, Schilstra, Cornelis, additional, Beetz, Ivo, additional, Muijs, Christina T., additional, Chouvalova, Olga, additional, Burlage, Fred R., additional, Doornaert, Patricia, additional, Koken, Phil W., additional, Leemans, C. René, additional, Rinkel, Rico N.P.M., additional, de Bruijn, Marieke J., additional, de Bock, G.H., additional, Roodenburg, Jan L.N., additional, van der Laan, Bernard F.A.M., additional, Slotman, Ben J., additional, Verdonck-de Leeuw, Irma M., additional, Bijl, Hendrik P., additional, and Langendijk, Johannes A., additional

Published
2012
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