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- 2022 (85) (entfernen)
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- CDK (2)
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- assistive robotics (1)
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- barrel cortex, cell types, multielectrode recordings, perception, psychophysics (1)
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Im zweiten Corona-Winter sollen die Schulen offenbleiben. Neben Fenster- und mechanischer Lüftung werden mobile Raumluftreiniger als sinnvolle Maßnahmen angesehen, um das Infektionsrisiko zu reduzieren. Dabei stellt sich die Frage, wie deren sicherer und zuverlässiger Betrieb gestalten sein muss. Gibt es bevorzugte Aufstellpositionen im Raum und wie wirkt sich die Luftbewegung auf die Behaglichkeit aus? Die Datenlage hierzu ist noch unzureichend (vgl. HLH-Interview mit Dr. Gommel, HLH 10/2021). Diese Fragen werden für einen typischen Seminar- und Klassenraum näher beleuchtet.
Robot arms are one of many assistive technologies used by people with motor impairments. Assistive robot arms can allow people to perform activities of daily living (ADL) involving grasping and manipulating objects in their environment without the assistance of caregivers. Suitable input devices (e.g., joysticks) mostly have two Degrees of Freedom (DoF), while most assistive robot arms have six or more. This results in time-consuming and cognitively demanding mode switches to change the mapping of DoFs to control the robot. One option to decrease the difficulty of controlling a high-DoF assistive robot arm using a low-DoF input device is to assign different combinations of movement-DoFs to the device’s input DoFs depending on the current situation (adaptive control). To explore this method of control, we designed two adaptive control methods for a realistic virtual 3D environment. We evaluated our methods against a commonly used non-adaptive control method that requires the user to switch controls manually. This was conducted in a simulated remote study that used Virtual Reality and involved 39 non-disabled participants. Our results show that the number of mode switches necessary to complete a simple pick-and-place task decreases significantl when using an adaptive control type. In contrast, the task completion time and workload stay the same. A thematic analysis of qualitative feedback of our participants suggests that a longer period of training could further improve the performance of adaptive control methods.
Gerechter Zufall per Gesetz?
(2022)
Grundkurs C++
(2022)
Das gesamte Grundwissen zu C++ im praktischen Taschenbuchformat – zum Lernen und Nachschlagen. Vom ersten einfachen Programm bis zu komplexen Anwendungen. Übungen am Ende jedes Kapitels helfen Ihnen bei der Lernkontrolle. Sämtliche Grundlagen (Klassen, Vererbung, Polymorphie, Templates usw.) werden kurz und übersichtlich dargestellt. Diese dritte Auflage berücksichtigt aktuelle Standars bis C++20.
Nowadays, robots are found in a growing number of areas where they collaborate closely with humans. Enabled by lightweight materials and safety sensors, these cobots are gaining increasing popularity in domestic care, where they support people with physical impairments in their everyday lives. However, when cobots perform actions autonomously, it remains challenging for human collaborators to understand and predict their behavior, which is crucial for achieving trust and user acceptance. One significant aspect of predicting cobot behavior is understanding their perception and comprehending how they “see” the world. To tackle this challenge, we compared three different visualization techniques for Spatial Augmented Reality. All of these communicate cobot perception by visually indicating which objects in the cobot’s surrounding have been identified by their sensors. We compared the well-established visualizations Wedge and Halo against our proposed visualization Line in a remote user experiment with participants suffering from physical impairments. In a second remote experiment, we validated these findings with a broader non-specific user base. Our findings show that Line, a lower complexity visualization, results in significantly faster reaction times compared to Halo, and lower task load compared to both Wedge and Halo. Overall, users prefer Line as a more straightforward visualization. In Spatial Augmented Reality, with its known disadvantage of limited projection area size, established off-screen visualizations are not effective in communicating cobot perception and Line presents an easy-to-understand alternative.