Disziplingenese und Krieg. American Studies im Zweiten Weltkrieg

Harders L. Disziplingenese und Krieg. American Studies im Zweiten Weltkrieg. In: Berg M, Thiel J, Walter PT, eds. Mit Feder und Schwert. Militär und Wissenschaft – Wissenschaftler und Krieg. Stuttgart: Steiner; 2009: 277-286

Enhancing the visual realism of hysteroscopy simulation

Visualization is a very important part of a high fidelity surgical simulator. Due to modern computer graphics hardware, which offers more and more features and processing power, it is possible to extend the standard OpenGL rendering methods with advanced visualization techniques to achieve highly realistic rendering in real-time. For an easy and efficient use of these new capabilities, a stand-alone graphics engine has been implemented, which exploits these advanced rendering techniques and provides an interface in order to ensure the interoperability with a software framework for surgical simulators

Evaluation of a virtual-reality-based simulator using passive haptic feedback for knee arthroscopy

Purpose: The aim of this work is to determine face validity and construct validity of a new virtual-reality-based simulator for diagnostic and therapeutic knee arthroscopy. Methods: The study tests a novel arthroscopic simulator based on passive haptics. Sixty-eight participants were grouped into novices, intermediates, and experts. All participants completed two exercises. In order to establish face validity, all participants filled out a questionnaire concerning different aspects of simulator realism, training capacity, and different statements using a seven-point Likert scale (range 1-7). Construct validity was tested by comparing various simulator metric values between novices and experts. Results: Face validity could be established: overall realism was rated with a mean value of 5.5 points. Global training capacity scored a mean value of 5.9. Participants considered the simulator as useful for procedural training of diagnostic and therapeutic arthroscopy. In the foreign body removal exercise, experts were overall significantly faster in the whole procedure (6min 24s vs. 8min 24s, p<0.001), took less time to complete the diagnostic tour (2min 49s vs. 3min 32s, p=0.027), and had a shorter camera path length (186 vs. 246cm, p=0.006). Conclusion: The simulator achieved high scores in terms of realism. It was regarded as a useful training tool, which is also capable of differentiating between varying levels of arthroscopic experience. Nevertheless, further improvements of the simulator especially in the field of therapeutic arthroscopy are desirable. In general, the findings support that virtual-reality-based simulation using passive haptics has the potential to complement conventional training of knee arthroscopy skills. Level of evidence: II

Recherche in Social-Media-Korpora mit KorAP

Die Korpusanalyseplattform KorAP wird als Nachfolgesystem zu COSMAS II am Leibniz-Institut für Deutsche Sprache (IDS) entwickelt und erlaubt einen umfassenden Zugriff auf einen Teil von DeReKo (Kupietz et al. 2010). Trotz einiger noch fehlender Funktionalitäten ist KorAP bereits produktiv einsetzbar. Im Folgenden wollen wir am Beispiel der Untersuchung von Social-Media-Korpora einige neue Möglichkeiten und Besonderheiten vorstellen

Work Package Leader ETH

Abstract: The main target of T7.1 was the development of VR based demonstrators for soft tissue interaction. While D7.1 mainly focused on theoretical background, and implementation detail, this report advances towards the evaluation of the system from several points of view. The studies range from psychophysical evaluation experiments, to more technical evaluation of the approaches. An evaluation of the realism of the soft tissue interaction demonstrator was carried out in a simple indentation test. In two experimental studies we examined the fidelity of a simple deformation model for providing haptic feedback during an interaction with virtual elastic objects. Both experiments were based on comparison of the interaction with a virtual object to that with a real silicone object. Our results indicate, that using the simplified physical model for the haptic interaction with soft objects, we were able to achieve a high fidelity of the virtual rendering. We found that subjects could discern between the categories with a mea

KorAP und EuReCo – Recherchieren in mehrsprachigen vergleichbaren Korpora

Die Korpusanalyseplattform KorAP ist von Grund auf sprachenunabhängig konzipiert. Dies gilt sowohl in Bezug auf die Lokalisierung der Benutzeroberfläche als auch hinsichtlich unterschiedlicher Anfragesprachen und der Unterstützung fremdsprachiger Korpora und ihren Annotationen. Diese Eigenschaften dienen im Rahmen der EuReCo Initiative aktuell besonders der Bereitstellung weiterer National- und Referenzkorpora neben DeReKo. EuReCo versucht, Kompetenzen beim Aufbau großer Korpora zu bündeln und durch die Verfügbarmachung vergleichbarer Korpora quantitative Sprachvergleichsforschung zu erleichtern. Hierzu bietet KorAP inzwischen, neben dem Zugang durch die Benutzeroberfläche, einen Web API Client an, der statistische Erhebungen, auch korpusübergreifend, vereinfacht

Evaluation of a virtual-reality-based simulator using passive haptic feedback for knee arthroscopy.

PURPOSE The aim of this work is to determine face validity and construct validity of a new virtual-reality-based simulator for diagnostic and therapeutic knee arthroscopy. METHODS The study tests a novel arthroscopic simulator based on passive haptics. Sixty-eight participants were grouped into novices, intermediates, and experts. All participants completed two exercises. In order to establish face validity, all participants filled out a questionnaire concerning different aspects of simulator realism, training capacity, and different statements using a seven-point Likert scale (range 1-7). Construct validity was tested by comparing various simulator metric values between novices and experts. RESULTS Face validity could be established: overall realism was rated with a mean value of 5.5 points. Global training capacity scored a mean value of 5.9. Participants considered the simulator as useful for procedural training of diagnostic and therapeutic arthroscopy. In the foreign body removal exercise, experts were overall significantly faster in the whole procedure (6 min 24 s vs. 8 min 24 s, p < 0.001), took less time to complete the diagnostic tour (2 min 49 s vs. 3 min 32 s, p = 0.027), and had a shorter camera path length (186 vs. 246 cm, p = 0.006). CONCLUSION The simulator achieved high scores in terms of realism. It was regarded as a useful training tool, which is also capable of differentiating between varying levels of arthroscopic experience. Nevertheless, further improvements of the simulator especially in the field of therapeutic arthroscopy are desirable. In general, the findings support that virtual-reality-based simulation using passive haptics has the potential to complement conventional training of knee arthroscopy skills. LEVEL OF EVIDENCE: II