Regeneration microelectrode array for peripheral nerve recordingand stimulation

A microelectrode array capable of recording from and stimulating peripheral nerves at prolonged intervals after surgical implantation has been demonstrated. The microelectrode array, fabricated on a silicon substrate perforated by multiple holes (referred to as via holes), is implanted between the ends of a surgically severed nerve. Regenerating tissue fixes the device in place to provide a stable mapping between the microelectrodes and the axons in the nerve. Processes were developed for the fabrication of thin-film iridium microelectrodes, micromachined via holes, and silicon nitride passivation layers. All fabrication methods were designed to be compatible with standard CMOS/BiCMOS processes to allow for on-chip signal processing circuits in future designs. Such arrays, implanted in the peroneal nerves of rats, were used to record from and stimulate the nerves at up to 13 months postoperatively.     

Fear of Negative Evaluation and the Reluctance to Transmit Bad News

An experiment was conducted to determine whether reluctance to transmit an overheard message intended for a stranger depends on (1) fear of negative evaluation by that stranger and (2) fear of the message's anticipated consequences for him. It was reasoned that a messenger would fear negative evaluation if he were identified by the recipient. The hypothesis that bad news would be transmitted less completely and spontaneously than good news was supported. Unexpectedly, anonymity did not interact with news content. Instead, greater communication occurred under nonanonymity than under anonymity. These findings, along with some supportive correlational data, are reinterpreted from an attribution-theoretical viewpoint.     

Analysis of millimeter wave phase shifters coupled to a fixedperiodic structure

The propagation characteristics of an active plasma-induced millimeter wave phase shifter coupled to a fixed periodic structure are discussed. The numerical calculation is based on an improved boundary value solution. Like a normal dielectric slab waveguide with a plasma layer, the grating waveguide displays a phase shift with the increase of the plasma density. This phase shift due to the significant change of the field distribution has an impact on the modal attenuation coefficient. It results in the scanning of the radiation beam in the vicinity of the second Bragg, Especially, at both weak and strong plasma densities when the mode losses are small, the resonances caused by the periodic structure do not appear to be weakened. The results can be used to design electronically controllable millimeter wave scanning antennas     

Structure of the Interlayer Boundary of Layered Metal Materials with an Internal Protector Obtained Via Explosion Welding

Metallurgist - Multilayer metal composite materials are used in the chemical industry, particularly nuclear power engineering, and enable to increase the robustness and durability of steel...