ABSTRACT Equations of fully general relativistic radiation hydrodynamics around a rotating black hole are derived by using the Kerr-Schild coordinate where there is no coordinate singularity at the event horizon. Since the radiation interacts with matter moving with relativistic velocities near the event horizon, the interplay between the radiation and the matter should be described fully relat...

This paper focuses on three commonly used sensorless methods based on high-frequency signal injection; namely, the rotating sinusoidal injection in the stationary reference frame, the pulsating sinusoidal injection in the estimated synchronous reference frame, and the pulsating square wave injection in the estimated synchronous reference frame. Although these methods have found applications in ...

This paper presents a human-robot interface system that enables a user to move a robot by moving his hand. It adopts the technique of the 3D measurement based on the affine invariants from multiple views. In this system, we can choose a reference frame to obtain the 3D hand motion between the user-centered frame and the world-fixed frame. With the former frame, the system interprets the user's ...

Regional reference frames fixed to the stable part of a tectonic plate are often required for national spatial reference systems and to facilitate geophysical interpretation and inter-comparison of geodetic solutions of crustal motions. In 2003, the Stable North American Reference Frame (SNARF) Working Group was established under the auspices of UNAVCO and IAG Regional Sub-Commission 1.3c to ad...

We propose a framework for error robust real−time video telephony over wireless networks. In our approach we cope with packet loss on the downlink by retransmitting lost packets from the base station to the receiver terminal. The effect of lost packets is reduced using error concealment. Retransmitted packets are used for error recovery. In order to be able to use the retransmissions for error ...

In motion capture applications using electromagnetic tracking systems the process of anatomical calibration associates the technical frames of sensors attached to the skin with the human anatomy. Joint centers and axes are determined relative to these frames. A change of orientation of the sensor relative to the skin renders this calibration faulty. This sensitivity regarding sensor displacemen...

At some stage in the process of a sensorimotor transformation for a reaching movement, information about the current position of the hand and information about the location of the target must be encoded in the same frame of reference in order to compute the hand-to-target difference vector. Two main hypotheses have been proposed regarding this reference frame: an eye-centered frame and a body-c...