OBJECTIVE The goal of this study was to investigate, in hearing-impaired participants who could not hear the stimuli, the possibility of artifactual auditory steady-state responses (ASSRs) when stimuli are presented at high intensities. DESIGN ASSRs to single (60 dB HL) and multiple (20 to 50 dB HL; 500 to 4000 Hz) bone-conduction stimuli as well as single 114 to 120 dB HL air-conduction stim...

We demonstrate all-optical logic in a micron-size silicon ring resonator based on the free-carrier dispersion effect in silicon. We show AND and NAND operation at 310 Mbit/s with ~10-dB extinction ratio. The free-carrier-lifetime-limited bit-rate can be significantly improved by active carrier extraction.

background and objectives: beta-thalassemia continues to be a cause of significant burden to the society particularly in the poorer developing countries. although sophisticated methods of screening have become available, a hunt for a cheap, rapid, objective screening method still remains elusive. thus, the objectives are to study the validity of naked-eye-single-tube-osmotic-fragility-test (nes...

The purpose of the present study was to investigate the effect of polyethylene glycol (PEG) molecular weights (6000, 12000 and 20000) as solid dispersion (SD) carriers on the dissolution behavior of simvastatin. SDs with various drug : carrier ratios were prepared by solvent method and evaluated for dissolution rate. Differential scanning calorimetry (DSC), X-ray diffraction (XRD), infrared spe...

We present a set of rate equations for the modal amplitudes and carrier-inversion moments that describe the deterministic multi-mode dynamics of a semiconductor laser due to spatial hole burning. Mutual interactions among the lasing modes, induced by high- frequency modulations of the carrier distribution, are included by carrier-inversion moments for which rate equations are given as well. We ...

In this paper we present an analytical approach to evaluate the bit error rate (BER) of OFDM systems subject to carrier frequency offset (CFO) and channel estimation error in Rayleigh flat fading as well as in time and frequency selective fading channels. Based on correct modeling of the correlation between channel estimates and received signals with carrier frequency offset, the bit error rate...

The increase of the capacity of communication systems can be achieved by an increase in the channel bit-rate. Increasing the channel rate assumes the utilization of shorter carrier pulses. It is well known that the propagation of short pulses is strongly affected by the fibre dispersion, which results in large temporal broadening of the carrier pulses. Subsequently, the carrier pulse power spre...

The mechanism of melibiose symport by the melibiose permease of Escherichia coli was investigated by further analyzing the Na+ (H+ or Li+)-coupled facilitated diffusion reactions catalyzed by the carrier in de-energized membrane vesicles, with particular emphasis on the reaction of sugar exchange at equilibrium. It is first shown that melibiose exchange at equilibrium proceeds without concomita...

background: indirect genetic diagnosis using polymorphic dna markers can detect carriers of hemophilia a. this technique is preferable in developing countries because of its simplicity and cost effectiveness compared to direct mutation analysis. in the present study, we examined usefulness of intragenic marker bcl i restriction fragment length polymorphism (rflp) at intron 18, for carrier detec...

the purpose of the present study was to investigate the effect of polyethylene glycol (peg) molecular weights (6000, 12000 and 20000) as solid dispersion (sd) carriers on the dissolution behavior of simvastatin. sds with various drug : carrier ratios were prepared by solvent method and evaluated for dissolution rate. differential scanning calorimetry (dsc), x-ray diffraction (xrd), infrared spe...