Gunn Oscillators Based on Shielded Dielectric Resonators with Mechanical Frequency Tuning

The features of Gunn oscillators based on shielded dielectric resonators with whispering gallery modes and ray oscillations are investigated. Their comparative analysis for oscillators with different dielectric resonant structures is carried out

Microwave Oscillator with the Shielded Dielectric Resonator

A Gunn oscillator with partially shielded hemidisk quasioptical resonator is investigated experimentally in this paper. The investigations of the generation characteristics of oscillations by the semiconductor diode in this resonator are carried out for the different radial co-ordinates of the oscillator active element. The advantages of the investigated oscillator in comparison with the oscillator with an open dielectric resonator are show

Anti-Religious Mood in Italy at the Turn of the 18–19th Centuries

The article is devoted to identifying the causes of anti-religious sentiments in Italy at the turn of the 18–19th centuries. The authors point to the reasons for the apologetic writings of Italian theologians. Their views had a very beneficial effect on the mental and in particular on the religious movement in Italy. Special attention is paid to the analysis of the situation in Italy in the 18–19th centuries. Based on this analysis, the authors conclude that because of the constant confrontation with the Italian government for power and their interests, apologists for Christianity, who belonged to the clergy of the Catholic Church, caused hostility towards the Catholic Church among ordinary Italians. In the course of the study, the idea of a significant impact of this situation on the spread of anti-Christian ideas in Italy at the turn of the 18–19th centuries was substantiated. And the national liberation movement for the unification of Italy, which was gaining momentum at that time, opened up a free field for the dissemination of various anti-church and atheistic teachings

Automated control system for a mashing process

The goal of this paper is to describe a system for a mashing process, which is the first part of brewing beer. The mashing is a procedure where the fermentable (and some non-fermentable) sugars are extracted from malts. The program part based on LabVIEW, which is used to control NI CompactRIO. The main target of the project is to reach a predefined levels of the temperatures and maintain it during the pauses. When the necessary break time is ended the system is ready to go to the new value. The precise control of the temperatures during the breaks is one of the critical factors that define the texture and alcohol content of the beer. The system has two tanks with resistors PT100 in both of them, heat exchanger (coil), heater and pump. The first tank has heating element in order to rise the temperature in the other one. This project has practical solution with all explanations and graphs which are proven working ability of this control system

Stimulated emission and lasing in Cu(In,Ga)Se2 thin films

Stimulated emission and lasing in Cu(In,Ga)Se 2 thin films have been demonstrated at a temperature of 20 K using excitation by a nanosecond pulsed N 2 laser with power densities in the range from 2 to 100 kW cm − 2 . Sharp narrowing of the photoluminescence band, superlinear dependence of its intensity on excitation laser power, as well as stabilization of the spectral position and of the full-width at half-maximum of the band were observed in the films at increasing excitation intensity. The stimulated emission threshold was determined to be 20 kW cm − 2 . A gain value of 94 cm − 1 has been estimated using the variable stripe length method. Several sharp laser modes near 1.13 eV were observed above the laser threshold of I thr ~ 50 kW cm −

ABOUT THE STUDY OF MEDICAL BIOPHYSICS USING ACTIVE FORMS OF EDUCATION

В статье продемонстрирована разработанная система семинарских занятий с применением активных форм обучения на примере освоения курса медбиофизики студентами медицинского вузаThe article demonstrates the developed system of seminars with the use of active forms of education on the example of the development of the course of medical Biophysics by students of a medical Universit

Исследование удельной электропроводности короткозамкнутой обмотки ротора асинхронных двигателей статистическим методом планирования эксперимента

Рассматривается влияние температуры и химсостава алюминия при заливке, длины пакетов и суммарного поперечного сечения пазов роторов на удельную электропроводность алюминия короткозамкнутой обмотки роторов асинхронных двигателей. В качестве метода исследования выбран экспериментально-статистический. Составлен центральный композиционный ротатабельный униформплан второго порядка. Для реализации плана изготовлено 116 экспериментальных роторов на базе двигателей серий АО и АО2. Удельная электропроводность измерялась прибором типа ИЭ-1 на вентиляционных крыльях, короткозамыкающих кольцах и на извлеченных из роторов стержнях обмотки. Всего произведено 4292 замера. В результате статистической обработки экспериментальных данных получены уравнения регрессии в виде полиномов второго порядка отдельно для короткозамыкающих колец и стержней обмотки. Проведена проверка уравнений на адекватность по F-критерию Фишера и коэффициентов уравнений на значимость по критерию Стъюдента. Уравнения регрессии позволяют учесть технологические и конструктивно-технологические факторы при проектировании асинхронных двигателей, аналогичных исследованным, и повысить точность расчета их характеристик