The development of resource saving tehnological processes of manufacture of rims with limited production resources

The problems of the economy of the production are actual in the contemporary conditions of the mechanical industry. Experimental studies profiling processes rims tractor wheels and proposed changes to the process. Introduction them in production allows to reduce metal expenditure and to improve quality of wheels.There has been developed the integrateal technology for the improvement of the competitability of the tractor wheels. The economic-mathematical models were developed for each stage of the integrated technology. Проблемы экономии производственных ресурсов являются актуальными  в современных условиях машиностроительного производства. Проведены экспериментальные исследования процессов профилирования ободьев тракторных колес и предложены изменения в технологический процесс. Разработана интегрированная технология для улучшения совместимости изготовления тракторных колес. Разработаны экономико-методические модели для каждой стадии интегрированной технологии. Внедрение их  в производство позволяет снизить затраты металла и улучшить качество колес

Radio recombination lines from the largest bound atoms in space

In this paper, we report the detection of a series of radio recombination lines (RRLs) in absorption near 26 MHz arising from the largest bound carbon atoms detected in space. These atoms, which are more than a million times larger than the ground state atoms are undergoing delta transitions (n~1009, Delta n=4) in the cool tenuous medium located in the Perseus arm in front of the supernova remnant, Cassiopeia A. Theoretical estimates had shown that atoms which recombined in tenuous media are stable up to quantum levels n~1500. Our data indicates that we have detected radiation from atoms in states very close to this theoretical limit. We also report high signal-to-noise detections of alpha, beta and gamma transitions in carbon atoms arising in the same clouds. In these data, we find that the increase in line widths with quantum number (proportional to n^5) due to pressure and radiation broadening of lines is much gentler than expected from existing models which assume a power law background radiation field. This discrepancy had also been noted earlier. The model line widths had been overestimated since the turnover in radiation field of Cassiopeia A at low frequencies had been ignored. In this paper, we show that, once the spectral turnover is included in the modeling, the slower increase in line width with quantum number is naturally explained.Comment: 5 pages, 4 figures, accepted for publication in MNRA

On the dependence of effective mechanical properties of ceramics on partial concentrations of different size pores in its structure

In the framework of the movable cellular automata method we have developed a plane/2D model of mechanical behavior of brittle porous material under shear loading. The work considers the material characterized by a function of pore size distribution with two maxima. Based on simulation results, the authors proposed the analytical estimation of the dependence of strength and elastic properties of the material on its total porosity and partial porosities that correspond to the pores with different sizes

On the dependence of effective mechanical properties of ceramics on partial concentrations of different size pores in its structure

In the framework of the movable cellular automata method we have developed a plane/2D model of mechanical behavior of brittle porous material under shear loading. The work considers the material characterized by a function of pore size distribution with two maxima. Based on simulation results, the authors proposed the analytical estimation of the dependence of strength and elastic properties of the material on its total porosity and partial porosities that correspond to the pores with different sizes

Educational technologies of new learning methodologies

Discusses the definition educational technology in the context of the new methodology of teaching in high school. Provides signs that should have a genuine education technology. The problems of development and introduction of modern educational technologies.Рассматривается определение образовательной технологии в контексте новой методологии обучения в вузе. Приведены признаки, которыми должна обладать подлинная технология обучения. Сформулированы задачи разработки и внедрения современных образовательных технологий

Обеспечение самостоятельной работы студентов средствами Learning Management System

In the article application of remote technologies for maintenance of independent work of students at the subject «Resistance of materials» in LMS Moodle is considered.В статье рассматривается применение дистанционных технологий для обеспечения самостоятельной работы студентов по курсу «Сопротивление материалов» в среде LMS Moodle

Formation of strategy of rural tourism development at regional level

Сільський зелений туризм виступає дієвим інструментом створення нових робочих місць та розвитку інфраструктури регіонів. В статті досліджені основні типи сільського туризму. Досліджено особливості сільського зеленого туризму та його вплив на зайнятість населення. Розглянуті та проаналізовані особливості надання туристичних послуг в заміському кластер-домі сільського туризму «Country House». Запропоновані заходи щодо більш ефективного розвитку зеленого туризму на Полтавщині і залучення більшої кількості вітчизняних і зарубіжних туристів.          Ключові слова: сільський зелений туризм, цінова стратегія, послуги сільського туризму, проблеми сільського зеленого туризму, авторські проекти для школярів. Green rural tourism is an effective instrument for workplaces creation and regional infrastructure development. The article explores the main types of rural tourism. The main types of green rural tourism and its impact on the population employment have been researched.  Furthermore, the principal features of the tourism services provided by the cluster-house of rural tourism «Country House» have been reviewed and analyzed. The measures which can promote the development of green tourism in Poltava region and attract more domestic and foreign tourists are proposed.         Key words: rural green tourism, price strategy, rural tourism service, green tourism issues, author's projects for schools