A bus is a collection of one or more wires. A bus is called a multiplex-bus when it is shared by a number of devices. There are many applications of a multiplex-bus. For example, a microprocessor-based measurement system may use a bus (say IEEE-488, VME, etc.) to interconnect a number o f microprocessor-based instruments, e.g., voltmeter, ammeter, data acquisition devices, etc. All the automobi...

This variation on a classical phenomenon makes it possible, even in an irregular sample, to measure fundamental constants with an accuracy rivaling that of the most precise measurements yet made F ew areas of modern science have effect, a planar sample of conductive been studied as intensively as the physics of semiconducting mate-material is placed in a magnetic field and thus obtain quantitie...

BACKGROUND How HIV-1 enter into the eyes remains obscure. We postulated that HIV-1 Tat protein can alter the expression of specific tight-junction proteins and disturb the blood retinal barrier, and contributes to HIV trafficking into the eyes. This study is to determine the effects of HIV-1 Tat proteins on the barrier function and tight-junction protein expression of retinal pigment epithelial...

It makes swept insertion and return loss measurements simultaneously, overa wide frequency range. TO THE MICROWAVE ENGINEER, an instru ment that measures insertion and return loss simultaneously, over a broad band, would be as useful as is the voltmeter to other electronic special ists, provided it is made practical in several im portant ways. • Its measurements must really refer to the micro...

The present PTB primary standard allows power measurements with a measurement uncertainty of about 2.5 μW / VA (k = 2). It operates at voltages up to 240 V and currents up to 10 A in the frequency range from 16 Hz up to some kHz. This paper gives a short overview of the working principle of the standard and recent improvements. © Metrology Society of India, All rights reserved. 1. Basic Operati...

Evanescent microwave principles of operation 1 are based on the papers described by Kumar and Smith [1] and Kumar [2]. They described that when a dielectric/semiconductor/biological material is placed in the vicinity of the evanescent waveguide (which is connected to a cavity resonator), the reflection coefficient of the resonator changes. Both the resonance frequency and the quality factor of ...

in this research, after carrying out chemical tests measuring the moisture, protein and ash contents on rice flour according to standard methods, gluten- free breads were prepared from rice flour combined with 0.5% carboxy methyl cellulose (cmc) and 1% -κcarrageenan gum. a sample lacking gum was also produced as control. rice breads (with gum and without gum) were then produced by semi-industri...

A study was conducted to determine differences in pulpal sensitivity of the maxillary primary anterior teeth in groups of children with unilateral clefts of the lip, alveolar process and palate, bilateral clefts of the lip process, and children without clefts. Thirty-nine children between the ages of 4 and 5 years with a total of 216 maxillary primary anterior teeth were tested using a pulp tes...

A scaled dc insulator contamination experiment in which the electric field, air flow, and particle dynamics around an insulator string are modeled has been implemented. Outstanding contamination features, including sharp clean rings and leeward wakes on the insulator surfaces, and diffuse contamination bands on the pin caps, are explained using simple trajectory models, which are both qualitati...

A unified global and local closed-orbit feedback system has been implemented at the Advanced Photon Source in order to stabilize both particle and photon beams. Beam stability requirements in the band up to 50Hz are 17μm in the horizontal plane and 4.4μm vertically. Orbit feedback algorithms are implemented digitally using multiple digital signal processors, with computing power distributed in ...