Examinando por Autor "Trefftz H."

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    Design and usability evaluation of a multi-input interface in an idTV environment
    (Springer Verlag, 2017-01-01) Téllez J.F.; Montoya J.C.; Trefftz H.; Universidad EAFIT. Departamento de Ingeniería de Sistemas; I+D+I en Tecnologías de la Información y las Comunicaciones
    In recent years, and considering the rise of Interactive Digital Television (idTV), it has been great interest in the design of applications and services for this platform. However, the success of these applications largely depends on the ease of use and how users interact with them. For this reason, we have explored different interfaces and modes of interaction to improve the user experience with these applications in comparison with the traditional Remote-Control (RC). This article presents an interaction with idTV applications using multiple input control interfaces with different modes of interaction such as touch buttons, gesture recognition, voice recognition, and recognition of movements. These modes of interaction were validated through usability testing using a model of quasi-experimental evaluation of three dimensions, where each dimension represents respectively: users, tasks and control interfaces. As a result of the qualitative and quantitative assessments, we performed an analysis of possible improvements in the usability of a particular application of idTV. The results showed few differences between one multi-input control interface and one RC in tasks the user was familiar with, on the opposite, significant differences were found in performing tasks involving greater user interaction, such as the text input or navigation between menus. © Springer International Publishing AG 2017.
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    Development of a tongue machine interface for quadriplegic patients
    (DESIGN SOC, 2017-01-01) Velásquez-López A.; Velásquez-Rendón D.; Amaya-Quiroz J.S.; Jimenez-Franco L.D.; Trefftz H.
    This article presents the development and validation of a wheelchair mobility solution. The solution is based on a Tongue Machine Interface (TMI) involving the use of Force Sensing Resistors (FSRs). The semantics and functionality of the development are compared with two other interfaces: a Joystick and a Brain Computer Interface (BCI) implemented on the same wheelchair. Each development is described from the electric, mechanic and informatic domains. Surveys and user's tests were performed in order to explore which technology had a more positive impact on the mobility of quadriplegic persons in terms of effectiveness, better ergonomics, lower costs and better functionality. The quantitative and qualitative results are described and analyzed.
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    Ítem
    Development of a tongue machine interface for quadriplegic patients
    (DESIGN SOC, 2017-01-01) Velásquez-López A.; Velásquez-Rendón D.; Amaya-Quiroz J.S.; Jimenez-Franco L.D.; Trefftz H.; Universidad EAFIT. Departamento de Ingeniería de Sistemas; I+D+I en Tecnologías de la Información y las Comunicaciones
    This article presents the development and validation of a wheelchair mobility solution. The solution is based on a Tongue Machine Interface (TMI) involving the use of Force Sensing Resistors (FSRs). The semantics and functionality of the development are compared with two other interfaces: a Joystick and a Brain Computer Interface (BCI) implemented on the same wheelchair. Each development is described from the electric, mechanic and informatic domains. Surveys and user's tests were performed in order to explore which technology had a more positive impact on the mobility of quadriplegic persons in terms of effectiveness, better ergonomics, lower costs and better functionality. The quantitative and qualitative results are described and analyzed.
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    Use of a serious game for teaching operations programming: Students' perceptions
    (Institute of Electrical and Electronics Engineers Inc., 2018-01-01) Carmona Gonzalez G.L.; Pelaez Valencia L.E.; Trefftz H.; Universidad EAFIT. Departamento de Ingeniería de Producción; Gestión de Producción y Logística
    This paper describes the experiences in the design, construction and validation of a serious game to be used as a support to teach Operations Management (or Operations Programming) in a Production Engineering program. The aim of this publication is to describe the perceptions of the students during the various development stages of the process. A semi-experimental study was conducted in order to determine the pedagogical effectiveness of the use of the game, but in this paper the authors focus on the perceptions of the students, which may become an important input for other faculty interested on using serious games as support for teaching other engineering courses. © 2018 IEEE.
  • No hay miniatura disponible
    Ítem
    Use of a serious game for teaching operations programming: Students' perceptions
    (Institute of Electrical and Electronics Engineers Inc., 2018-01-01) Carmona Gonzalez G.L.; Pelaez Valencia L.E.; Trefftz H.; Universidad EAFIT. Departamento de Ingeniería de Sistemas; I+D+I en Tecnologías de la Información y las Comunicaciones
    This paper describes the experiences in the design, construction and validation of a serious game to be used as a support to teach Operations Management (or Operations Programming) in a Production Engineering program. The aim of this publication is to describe the perceptions of the students during the various development stages of the process. A semi-experimental study was conducted in order to determine the pedagogical effectiveness of the use of the game, but in this paper the authors focus on the perceptions of the students, which may become an important input for other faculty interested on using serious games as support for teaching other engineering courses. © 2018 IEEE.