Three-dimensional magnetohydrodynamical simulations of strongly magnetized “light” conical jets have been performed. An investigation of the transition from sub-Alfvénic to super-Alfvénic flow has been made for nearly poloidal and for helical magnetic fields. The jets are stable to asymmetric modes of jet distortion provided they are sub-Alfvénic over most of their interior but destabilize rapi...

OBJECTIVE To quantitate a size distortion involving the side of space contralateral to the lesion (contralesional) in two right-brain-damaged patients. METHODS We studied two right-brain-damaged patients with lesions sparing the occipital lobe and a mild left neglect on target cancellation or line bisection. The lesions involved the temporoparietal region (Patient 1) and the basal ganglia and...

I INTRODUCTION Microphone arrays are powerful tool for the acoustic interference suppression. They usually utilize adaptive algorithm that adapts its beam pattern so to maximally suppress interferences, having unity gain for the desired signal. Its weightings are usually estimated applying minimum variance (MV) criterion utilizing one of the two beamformer types: Frost's beamformer [1] or gener...

Joint RF-baseband interference cancellation to reduce receiver complexity and power consumption. Summary One of the major drawbacks towards the realization of MIMO and multi-sensor wireless communication systems is that multiple antennas at the receiver each have their own separate radio frequency (RF) front ends and analog to digital converter (ADC) units, leading to increased circuit size and...

Figure 1. (a) Conventional multi-standard transmitter architecture. (b) Flexible transmitter with no filters Abstract— In recent publications the Poly-phase multipath technique has been shown to produce a clean output spectrum for a power upconverter (PU) architecture. The technique utilizes frequency independent phase shifts before and after a nonlinear element to cancel out the harmonics and ...

The fusion of voice and data applications, along with the demand for high data-rate applications such as video-on-demand, is making radio frequency (RF) spectrum an increasingly expensive commodity for current and future communications. Although bandwidth-efficient digital modulation alleviates part of the problem by requiring a minimal use of spectral resources, they put an extra design burden...