We study the coordinated transmission problem in cooperative cellular networks where a cluster of base stations forms a virtual cell to serve a mobile station (MS). The performance of such a MS-centric virtual cell network is dictated by the beamformer that enables to suppress interference, however designing a beamformer is highly challenging due to the coupled nature of interference and desire...

This paper presents an approach for providing realistic force feedback to users manipulating serial-chain virtual mechanisms. In the proposed approach, a haptic device controller is designed that penalizes users’ motion along the directions resisted by the virtual joints. The resisted directions span the null space the Jacobian of the virtual mechanism computed at the users’ hand, and are deriv...

Multi-threshold CMOS (MTCMOS) technology is an effective sub-threshold leakage power reduction method in CMOS circuits, which satisfies high-performance and low-power design requirements. The optimization of virtual supply network plays an important role in MTCMOS low-power design. Existing low-power works are mainly on gate level, without any optimization on physical design level, which can le...

A virtual agent that guides users through mindfulness meditation sessions is described. The agent uses input from a respiration sensor to both respond to user breathing rate and use deep breaths as a continuation and acknowledgment signal. A pilot evaluation study comparing the agent to a selfhelp video indicates that users are very receptive to the virtual meditation coach, and that it is more...

Abstrac t In the paper a virtual instrument for power quality measurement and research is proposed. The instrument is divided in several modules which provide generation, measurement and recording of the typical power quality (PQ) disturbances such as: harmonics, voltage dips, interruptions, flicker, unbalance etc. The virtual instrument allows setting different measurement parameters which exp...

in this paper, by investigating the common weights concept and dea models with nonlinear virtual inputs/outputs, we introduce a model for evaluating the decision making units with nonlinear virtual inputs and outputs based on the common weights.

This work concerns a system based on EMG sensors, signal conditioning circuitry, classification algorithm based on Artificial Neural Network, and virtual avatar representation, useful to identify hand movements within a set of five. This is to potentially make any trans-radial upper-limb amputee able to drive a virtual or real limb prosthetic hand. We focused on differences resulting with the a...

This paper aims to realize the testing through impedance control simulation by using Bond Graphs. Thus, in order to make these tests signal generators were used in order to replace the haptic device and virtual interface and the results provided by them have shown position compensation when receiving a force from the virtual environment. Also, in order to simplify the control scheme the force r...