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This paper deals with a software package for the numerical analysis in transient and steady-state modes of power electrical networks or variable speed drives with arbitrary topologies. The package is composed of a series of units, each representing a speci ...
We investigated the I-V characteristics of the double barrier stair-well structure. Resonant tunneling current is achieved by application of an electric field, which increases the transmission under positive bias and decreases it under the reverse bias. Th ...
On-column thermooptical absorbance (TOA) detection in capillary electrophoretic separations of various nucleoside and mono- and diphosphate nucleotide mixtures absorbing at 257 nm is demonstrated in 20 μm i.d. capillaries. The analytes are optically pumped ...
We have fabricated YBa/sub 2/Cu/sub 3/O/sub 7/ ramp-type junctions incorporating a barrier layer of NdGaO/sub 3/ with a nominal thickness of 2 nm. The junctions exhibit pronounced Josephson effects and operate up to 82 K. The characteristics are well descr ...
Institute of Electrical and Electronics Engineers1995
A novel approach, called pigtailing, is presented for the construction of optical detectors for capillary electrophoresis. Optical components and procedures from other fields, mainly telecommunications, are incorporated into these devices to give miniaturi ...
A series of direct carotid end-to-end laser anastomosis vs. direct manual suture was carried out on a series of 70 Wistar rats (mean weight 260 g). Both common carotids (0.8-1.2 mm) were sectioned and repaired. The left side (n = 70) was submitted to laser ...
We report on the realization of InGaAs-lnGaAsP separate confinement heterostructure multiple quantum well lasers grown by chemical beam epitaxy. We discuss key growth parameters and characterization by secondary-ion mass spectroscopy, transmission electron ...
In this work, we present the Hall electrical properties for molecular beam epitaxy,grown modulation-doped field-effect transistors structures using a short-period superlattices channel of (InAs)(1.1+/-0.1) (GaAs)(n) where the indexes 1.1 and n represent th ...
A method of obtaining a relative calibration of Si photodiodes for the spectral range of soft x rays (1-30 KeV) is presented. A simple mathematical model of the p-n diode is adopted which allows the response to be described in terms of a small set of param ...
We studied the electrical properties, the Hall mobility and the free carrier concentration of modulation-doped field-effect transitor heterostructures using M(InAs)mN(GaAs)m short-period superlattice (SPS) channels. We changed the number of monolayers m fo ...
