Numerical simulation of coupled electron devices and circuits by the MEP hydrodynamical model for semiconductors with Crystal heating

Solutions of a new 2d semiconductor numerical model describing the electron transport in semiconductors coupled with the heating of the Crystal lattice are presented. The model equations have been obtained with the use of the maximum entropy principle. Numerical simulations of a nanoscale MOSFET and inverter circuit are presented and the influence of self-heating on the electrical characteristics is analyzed

Optimization of limiting modes of streamer semiconductor laser

The influence of intensive electric and optical fields produced by streamer discharge in wide-gap semiconductor on their spectroscopic properties has been studied. The given effect is developed at appearance of reversed reconstruction of active environment luminescent characteristics. The methods of sufficient increase in durability and efficiency of streamer laser at limiting modes based on application of semiconductor protecting layers of a definite crystallographic orientation and crystal microrelief with element size of light wave length order. Streamer luminescence in new perspective CaGa2S4:Eu, Ca4Ga2S7:Eu compounds is found and studied

Observation of time quasicrystal and its transition to superfluid time crystal

We report experimental realization of a quantum time quasicrystal, and its transformation to a quantum time crystal. We study Bose-Einstein condensation of magnons, associated with coherent spin precession, created in a flexible trap in superfluid $^3$He-B. Under a periodic drive with an oscillating magnetic field, the coherent spin precession is stabilized at a frequency smaller than that of the drive, demonstrating spontaneous breaking of discrete time translation symmetry. The induced precession frequency is incommensurate with the drive, and hence the obtained state is a time quasicrystal. When the drive is turned off, the self-sustained coherent precession lives a macroscopically-long time, now representing a time crystal with broken symmetry with respect to continuous time translations. Additionally, the magnon condensate manifests spin superfluidity, justifying calling the obtained state a time supersolid or a time super-crystal

Current control in the competence approach

This paper proposes a method of monitoring the knowledge-based test technologies and allows monitoring of formation of partial competencies. The proposed method is illustrated by the example of the course of computer scienceВ работе предлагается методика текущего контроля знаний, основанная на тестовых технологиях и позволяющая осуществлять частичный мониторинг сформированности компетенций. Предлагаемая методика иллюстрируется примером из курса информатик

Study of the results of use on the academic performance of the first-year students of applied mathematics and computer science

The paper discusses the influence of such factors as the results of the Unified State Examination on the academic performance of the first-year students throughout the school year. It uses the technique of grouping students according to their level of performanceВ работе рассматривается вопрос о влиянии такого фактора как результаты единого государственного экзамена на успеваемость студентов-первокурсников в течение всего учебного года. При этом используется методика группировки студентов по уровню их успеваемост