This paper presents a control strategy which allows a manipulator/ camera system to track objects with planar motion while simultaneously avoiding kinematic singularities by moving in directions along which the tracking task space is unconstrained. The projection of a cartesian manipulability gradient on these directions of motion is used to determine the magnitude and direction of the required...

The design of retaining walls depends on the magnitude of active pressure exerted from the backfill. Therefore, estimating the scale of this pressure is a fundamental factor in the design. In this study, to assess the active earth pressure, a rigid retaining wall was built capable of translating and/or rotating with adjustable speed. Further, several physical tests were conducte...

In this study, active tendons with Proportional Integral Derivation type controllers were applied to a SDOF and a MDOF building model. Physical models of buildings were constituted with virtual springs, dampers and rigid masses. After that, equations of motion of all degrees of freedoms were obtained. Matlab Simulink was utilized to obtain the block diagrams for these equations of motion. Param...

BACKGROUND The formation of heterotopic ossification (HO) about the elbow after traumatic injury has been well documented in the literature. The optimal treatment, however, for ectopic bone associated with restricted range of motion and ulnar nerve entrapment syndrome has not been established. METHODS Seven elbows with HO in 7 patients admitted to Chang Gung Memorial Hospital from April 1998 ...

Exercise video games (exergames) can motivate players to be more physically active. However, most exergames are controlled by confined and predefined movements and do not promote long-term motivation. Well-funded commercial games often excel at long-term motivation, but are not operated with motion input. Exercise My Game (XMG) is a design framework for turning offthe-shelf action games into fu...

We describe an approach for extracting threedimensional articulated motion from unrestricted monocular video sequences. We combine feature extraction methods based on active contours with interactive adjustment. An articulated model is interactively aligned with the image in selected anchor frames. Active contour points are anchored to model segments in these frames. Occluded points are detecte...

The study of visual illusions of self-motion, or vection, has a long history of research dating back to its first descriptions by Helmholtz (1867). Early vection studies tended to induce vection in physically stationary observers or passively moved observers (externally generated perceptions of self-motion). It has not been until recently that studies have examined this experience in actively m...

We study the effect of different types of fluctuation on the motion of self-propelled particles in two spatial dimensions. We distinguish between passive and active fluctuations. Passive fluctuations (e.g., thermal fluctuations) are independent of the orientation of the particle. In contrast, active ones point parallel or perpendicular to the time dependent orientation of the particle. We deriv...

This report considers the task of 3d reconstruction within a Next Best View (NBV) planning approach. Particular attention is given to the possibilities of extending the well-known Kanade-Lucas-Tomasi (KLT) tracker [1] for the application within a controlled planning framework. The benefit of the tracker’s extensions to the planning procedure is evaluated quantitatively. In relation to general s...

The brain can retain speed information in early visual short-term memory in an astonishingly precise manner. We investigated whether this (early) visual memory system is active during the extrapolation of occluded motion and whether it reflects speed misperception due to contrast and size. Experiments 1A and 2A showed that reducing target contrast or increasing its size led to an illusory speed...