Design considerations for a monolithic, GaAs, dual-mode, QPSK/QASK, high-throughput rate transceiver

A monolithic, GaAs, dual mode, quadrature amplitude shift keying and quadrature phase shift keying transceiver with one and two billion bits per second data rate is being considered to achieve a low power, small and ultra high speed communication system for satellite as well as terrestrial purposes. Recent GaAs integrated circuit achievements are surveyed and their constituent device types are evaluated. Design considerations, on an elemental level, of the entire modem are further included for monolithic realization with practical fabrication techniques. Numerous device types, with practical monolithic compatability, are used in the design of functional blocks with sufficient performances for realization of the transceiver

Dislocation generation and propagation during flash lamp annealing

Dislocation generation and propagation during flash lamp annealing for 20 ms was investigated using wafers with sawed, ground, and etched surfaces. Due to the thermal stress resulting from the temperature profiles generated by the flash pre-existing dislocations propagate into the wafer from both surfaces during flash lamp annealing. A dislocation free zone was observed around 700 μm depth below the surface of a 900 μm thick sawed wafer. The dislocation propagation can be well described by a three-dimensional mechanical model. It was further demonstrated that in wafers being initially free of dislocations no dislocations are generated during flash lamp annealing

Інтелектуальна система діагностики патології щитовидної залози

It is considered a principle of thyroid pathology diagnostics intelligent system structure. It is determined basic ultrasound images features for patients with thyroid cancers. The block diagram of intellectual diagnostics is proposed. It includes two basic subsystems: making decision support and image processing. As a classifier it is used fuzzy neural networks (NEFCLASS) due to its synergy capabilities: rule-based representation and generalization possibilities. As a activation function of rule neuron (to calculate of activation of rules on the basis of membership functions) the T-norm is used. It is used convolution neural networks for ultrasound images processing.Розглянуто принцип побудови інтелектуальної системи діагностики патологій щитовидної залози. Визначено основні особливості ультразвукових зображень для пацієнтів з раком щитовидної залози. Запропоновано структурну схему інтелектуальної діагностики, яка включає дві основні підсистеми: підтримки прийняття рішень і обробки зображень. В якості класифікатора використовується нечітка нейронна мережа (NEFCLLASS) через її синергетичні можливості: представлення результату на основі правил і можливості узагальнення. Як функції активації нейрона (для розрахунку активації правил на основі функцій приналежності) використовується Т-норма. Для обробки ультразвукових зображень використовується згорткова нейронна мережа

Inter-individual Variation in Cancer and Cardiometabolic Health Outcomes in Response to Coffee Consumption : a Critical Review

Funding Sources None declared. Conflict of Interest None declared. Author Contributions E.V. and B.d.R. designed the study. E.V. created the search strategy under the supervision of B.d.R.E.V. and B.d.R. conducted the literature search, evaluated articles, and interpreted the data. E.V. drafted the manuscriptand B.d.R and J.M.G. reviewed and revised the article.Peer reviewedPostprin

Elastic equilibrium plate with curvilinear contour, partly reinforced ribs elastic system

Розглянуто задачу циліндричного згину на нескінченності пластини з криволінійним отвором, контур якого частково підсилений системою двох пружних ребер, наділених жорсткістю на згин та кручення. Побудовано математичну модель задачі у вигляді системи інтегро-диференціальних рівнянь з логарифмічними ядрами. Методом колокації досліджено вплив жорсткості підсилювальних ребер на розподіл напружень на контурі трикутного отворуThe problem of cylindrical bending and infinite plate with a curvilinear hole, the path is partially reinforced system of two elastic ribs, endowed with stiffness in bending and torsion is shown. As well mathematical model of a problem as a system-integrated diferential equations whith logarithmic kernel is built. Collocation method of amplifying the impact stiffness of ribs on the stress distribution on the circuit opening is being investigated

Stress-strain state of a plate with a partly stronger curvilinear contour in its cylindrical bending

. Розв’язано контактну задачу про часткове підсилення контуру криволінійного отвору в нескінченній ізотропній пластинці тонким пружним ребром змінної жорсткості на згин та кручення. Математичну модель задачі побудовано у вигляді системи двох сингулярних інтегро-диференціальних рівнянь із логарифмічними ядрами. Методом колокації досліджено вплив жорсткості підсилювальних елементів на розподіл напружень на контурі отвору пластини.A contact problem on a partial reinforcement of curvilinear hole contour in an infinite isotropic plate by a thin elastic edge of variable stiffness in bending and torsion is considered. Mathematical model as a system of two singular integro-differential equation with logarithmic kernels is constructed . The influence of stiffening elements on the stress distribution on the contour of plate hole is investigated by collocation method

The feasibility of using electromagnetic waves in determining the moisture content of building fabrics and the cause of the water ingress

In this paper, the feasibility of using electromagnetic (EM) waves is determining the moisture content of building fabrics and the case of water ingress in experimentally assessed. This paper will concentrate on investigating the propagation of EM waves through typical structures and their interaction with concealed pipework, wiring and timber. All current methods are overviewed and analysed. Novel microwave sensor described in this paper operates in 6 GHz to 12 GHz frequency range using Marconi 6200A microwave test set. Results of experimental test confirm that microwaves can be used as an alternative nondestructive method for identifying different object behind the walls

Editors' Choice - Precipitation of Suboxides in Silicon, their Role in Gettering of Copper Impurities and Carrier Recombination

This paper describes a theoretical investigation of the phase composition of oxide precipitates and the corresponding emission of self-interstitials at the minimum of the free energy and their evolution with increasing number of oxygen atoms in the precipitates. The results can explain the compositional evolution of oxide precipitates and the role of self-interstitials therein. The formation of suboxides at the edges of SiO2 precipitates after reaching a critical size can explain several phenomena like gettering of Cu by segregation to the suboxide region and lifetime reduction by recombination of minority carriers in the suboxide. It provides an alternative explanation, based on minimized free energy, to the theory of strained and unstrained plates. A second emphasis was payed to the evolution of the morphology of oxide precipitates. Based on the comparison with results from scanning transmission electron microscopy the sequence of morphology evolution of oxide precipitates was deduced. It turned out that it is opposite to the sequence assumed until now. © 2020 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited