In this paper we analyze measurements conducted in an indoor environment of our university building at a central frequency of 2.4 GHz in terms of the Saleh-Valenzuela channel. The channel parameters are extrapolated by processing the power-delay profiles measured by a vector network analyzer. Final adjustments of the parameters are obtained by comparison of simulated and measured delay-spread c...

A joint effort between the U.S. Naval Academy and the National Institute of Standard and Technology (NIST) resulted in the development of a method to characterize the capacitance and dissipation factor of a set of commercial standard four terminal-pair (4TP) capacitors. The method depends on network analyzer impedance measurements at high frequencies (40 MH–200 MHz) and a regression of these me...

introduction: motion of the patient during myocardial perfusion spect could potentially results in false perfusion defects. the effect of different reconstruction methods on these artifacts is not studied. clarification of the relation between the extent, severity and duration of motion with the resultant artifacts may be helpful in designing special soft wares for motion correction. this study...

background: ammonium is produced in culture medium due to amino acids degradation and has adverse effect on in vitro culture of embryo. in the current study, the purpose was to evaluate the effects of ammuniom chloride (ac) on in vitro oocyte maturation rate and early embryo development in the sheep and its effect on the expression of bcl-2. methods: in vitro maturation (ivm) was performed in t...

This study demonstrates the use of a selective and sensitive voltammetric sensor for determination of acetaminophen (AC). This was  performed by modifying a glassy carbon electrode with composite film of poly(4-vinylpyridine) and graphene sheet (P4VP/GR-GCE). The redox peak currents of AC increased significantly at P4VP/GR-GCE. The result was achieved by the synergistic effect of combined elect...