We report thermal and mechanical responses accompanying electrical characteristics of depletion mode GaN high electron mobility transistors exposed to gamma radiation up 107 rads. Changes in the lattice strain temperature were simultaneously characterized by changes phonon frequency E2 (high) A1 (LO) from on-state unpowered/pinched off reference states. Lower doses improved properties; however,...

aims: intensification of current environmental legislation leads to an increase wastewater treatment sludge volume. so reducing the sludge volume is considered as a strategy to improve and solve the problems of secondary pollution of sludge. dissolved air flotation (daf) as a substitute clarifier is used for separation of activated sludge liquid-solid phases. the aim of this study was to estima...

introduction today, there is a growing interest in the use of hadrontherapy as an advanced radiotherapy technique. hadrontherapy is considered a promising tool for cancer treatment, given its high radiobiological effectiveness and high accuracy of dose deposition due to the physical properties of hadrons. however, new radiation modalities of dose delivery and on-line beam monitoring play crucia...

OBJECTIVE During transcranial electrical stimulation, current passage across the scalp generates voltage across the scalp surface. The goal was to characterize these scalp voltages for the purpose of validating subject-specific finite element method (FEM) models of current flow. APPROACH Using a recording electrode array, we mapped skin voltages resulting from low-intensity transcranial elect...

STANDARDS Prophylactic treatment of thromboembolism in patients with severe motor deficits due to spinal cord injury is recommended. The use of low-molecular-weight heparins, rotating beds, adjusted dose heparin, or a combination of modalities is recommended as a prophylactic treatment strategy. Low-dose heparin in combination with pneumatic compression stockings or electrical stimulation is re...

Motor nerve conduction (MNC) from proximal and distal points of the median and ulnar nerve was examined in 14 patients receiving a total of 29 i.v. regional anaesthetics (IRA) with bupivacaine hydrochloride in doses ranging from 100 to 300 mg. Conduction was tested during and following vascular obstruction, until MNC returned to pre-IRA value. After 20 min of obstruction, MNC was unobtainable i...

The intensity used during transcutaneous electrical nerve stimulation (TENS) in both, clinical practice and research studies, is often based on subjective commands such as "strong but comfortable sensation". There is no consensus regarding the effectiveness dose of TENS. The objective was to determine the difference in the effect of spinal TENS on soleus H-reflex modulation when applied by two ...

Cardiac tissue dysfunction can result from high-intensity electrical shocks and is manifested as changes in transmembrane potential ( V m). Ten-millisecond shock pulses (SPs) of varying intensity and polarity were applied to frog ventricle in diastole, and V m was quantified directly under the stimulating electrode by an optical method using voltage-sensitive dye. As SP intensities were increas...

OBJECTIVE To determine the hypoalgesic effects of transcutaneous electrical nerve stimulation (TENS) parameter combinations on experimental models in healthy humans. METHODS Searches were performed using the electronic databases Ovid MEDLINE, CINAHL, AMED, and Web of Science (from inception to December 2009). Manual searches of journals and reference lists of retrieved trials were also perfor...

This article presents the development and application of a modelling approach based on quantities obtained from mechanical electrical tests to assess aging low voltage cable insulation for nuclear applications. In order obtain experimental data needed establishing models, accelerated is performed coaxial cables. The first part this paper focuses predictive properties; allows evaluation Dose Equ...