Поверхностная закалка колесной стали высокоэнтальпийной плазменной струей// Journal of Technical and Natural Sciences 1(10), 2019/ OEAPS Inc.(Open European Academy of Public Sciences); Chief Editor Vitaly Yakovlev- Berlin, Germany. 26.01.2019: OEAPS Inc., 2019. - pp. 8-26.

2019 ◽  
Author(s):  
Серик Кажимович Бийжанов ◽  
Амангельды Токешович Канаев
Keyword(s):  
Plasma Treatment ◽  
Heat Affected Zone ◽  
Heating Temperature ◽  
Chief Editor ◽  
Natural Sciences ◽  
Austenite Decomposition ◽  
Surface Plasma ◽  
European Academy ◽  
Maximum Heating Temperature ◽  
Maximum Heating

В статье дается подробное описание процесса поверхностной плазменной обработки тяжело нагруженных стальных деталей. Для решения вопроса о типе структур, возникающих в зоне термического влияния и, следовательно, об их свойствах, определяются скорости охлаждения в каждом микрообъеме, с последующим сопоставлением с термокинетическими кривыми распада аустенита при определенной концентрации аустенита и максимальной температуре нагрева.The article provides a detailed description of the process of surface plasma treatment of heavily loaded steel parts. To solve the problem of the type of structures arising in the heat-affected zone and, therefore, their properties, the cooling rates in each microvolume are determined, followed by comparison with the thermokinetic austenite decomposition curves at a certain austenite concentration and maximum heating temperature.

PROBLEMS OF USING COUNTRY-SIDE TOURISM POTENTIAL// Journal of Technical and Natural Sciences 1(10), 2019/ OEAPS Inc.(Open European Academy of Public Sciences); Chief Editor Vitaly Yakovlev- Berlin, Germany. 26.01.2019: OEAPS Inc., 2019. - pp. 27-29.

2019 ◽  
Author(s):  
Aybibi Erkinovna Matchanova ◽  
Bekhzod Bakhrom ugli Aminov
Keyword(s):  
Chief Editor ◽  
Natural Sciences ◽  
European Academy ◽  
Tourism Potential

This article explores the problems of raising the tourism potential of villages and developing agrotourism. Development of agro-tourism at the demand of tourists using the fertility of existing rural resources in Uzbekistan is one of the most pressing issues of the present day. Especially the villages on the banks of the river, the mountain are widely described in the article.

DETERMINATION THE ACTIVITY OF THE NATURAL RADIOACTIVE ISOTOPE K-40 AND THE TECHNOGENIC RADIONUCLIDE Cs-137 IN THE TRUNKS AND FRUITS OF PERENNIAL TREES// Journal of Technical and Natural Sciences 2(11), 2019/ OEAPS Inc.(Open European Academy of Public Sciences); Chief Editor Vitaly Yakovlev- Berlin, Germany. 26.02.2019: OEAPS Inc., 2019. - PP.29-33.

2019 ◽  
Author(s):  
Оrifjon Bahromovich Mamatkulov ◽  
Shakhboz Khasanovich Khasanov ◽  
Temur Turakulovich Mavlonov ◽  
A’zam Тursunovich Khudayberdiev
Keyword(s):  
Radioactive Isotope ◽  
Specific Activity ◽  
Chief Editor ◽  
Natural Sciences ◽  
Spectrometric Method ◽  
European Academy ◽  
Scintillation Gamma ◽  
Technogenic Radionuclide ◽  
Natural Radioactive Isotope

In the present work with the help of the scintillation gamma spectrometric method the specific activity of the natural radioactive isotope K-40 and the techno genic radionuclide Cs-137 in the trunks and fruits of perennial trees were determined.

Journal of Technical and Natural Sciences 4(13), 2019/ OEAPS Inc.(Open European Academy of Public Sciences); Chief Editor Vitaly Yakovlev- Berlin, Germany. 26.05.2019: OEAPS Inc., 2019. - 74 P. ISBN: 9781075497858

2019 ◽  
Author(s):  
Inc. OEAPS
Keyword(s):  
Chief Editor ◽  
Natural Sciences ◽  
Theory And Practice ◽  
Original Research ◽  
Research Papers ◽  
European Academy ◽  
Constant Interest ◽  
Critical Reviews

Authoritative and critical reviews of the latest achievements of natural and technical disciplines are published by Journal of Technical and Natural Sciences. Journal of Technical and Natural Sciences, an international peerreviewed journal, publishes both theoretical and experimental highquality documents of constant interest, previously unpublished in journals, in the field of technical and natural sciences, whose purpose is to promote theory and practice. In addition to the peerreviewed original research papers, the Editorial Board welcomes original research reports, modern surveys and communications in a broadly defined field of technical and natural sciences.

ПСИХОДИДАКТИЧЕСКИЕ АСПЕКТЫ ОСВОЕНИЯ СТУДЕНТАМИ-ГУМАНИТАРИЯМИ СОДЕРЖАНИЯ ЕСТЕСТВЕННОНАУЧНЫХ ДИСЦИПЛИН// Academy Journal No.5(17), 2019/ Chief Editor Susan Belih /OEAPS Inc.(Open European Academy of Public Sciences). Tallinn, Estonia. 09.05.2019: OEAPS Inc., 2019. - pp. 37-44.

2019 ◽  
Author(s):  
Раиса Николаевна Афонина ◽  
Татьяна Степановна Малолеткина
Keyword(s):  
Left Hemisphere ◽  
Natural Science ◽  
Chief Editor ◽  
Natural Sciences ◽  
Evidence Based ◽  
European Academy ◽  
Emotional Perception ◽  
The World ◽  
Humanities Students ◽  
Figurative Thinking

В статье рассматриваются психодидактические аспекты освоения студентами-гуманитариями содержания естественнонаучных дисциплин. Специфика обучения естественнонаучным дисциплинам студентов-гуманитариев определяется наличием у данной группы обучающихся особенностей восприятия и переработки информации. Для гуманитариев в большей мере характерно превалирование ассоциативного, образного мышления, эмоционального восприятия информации, отторжение формализованных, доказательных способов рассуждений, доминирование реального восприятия окружающего мира над абстрактным, идеализированным. Современные педагогические методики в основном ориентированы на левополушарное восприятие, именно поэтому правополушарные учащиеся оказываются в невыгодном положении. The article deals with psychodidactic aspects of mastering the content of natural sciences by humanities students. The specificity of teaching the natural science disciplines of humanities students is determined by the presence of features of perception and processing of information in this group of students. For the humanities, the prevalence of associative, figurative thinking, emotional perception of information, the rejection of formalized, evidence-based ways of reasoning, the dominance of the real perception of the world over the abstract, idealized, are more characteristic. Modern pedagogical methods are mainly focused on left hemisphere perception, which is why right hemispheric students find themselves at a disadvantage.

Journal of Technical and Natural Sciences 9, 2018/ OEAPS Inc.(Open European Academy of Public Sciences); Chief Editor Vitaly Yakovlev- Berlin, Germany. 18.12.2018: OEAPS Inc., 2019. - 35 P.

2019 ◽  
Author(s):  
Inc. OEAPS ◽  
Михаил Владимирович Кармаза ◽  
Роман Владимирович Мотылев ◽  
Вероника Александровна Одрузова ◽  
Нишчхал ◽  
...  
Keyword(s):  
Chief Editor ◽  
Natural Sciences ◽  
Theory And Practice ◽  
Original Research ◽  
Research Papers ◽  
High Quality ◽  
European Academy ◽  
Constant Interest ◽  
Critical Reviews

Authoritative and critical reviews of the latest achievements of natural and technical disciplines are published by Journal of Technical and Natural Sciences.Journal of Technical and Natural Sciences, an international peer¬reviewed journal, publishes both theoretical and experimental high¬quality documents of constant interest, previously unpublished in journals, in the field of technical and natural sciences, whose purpose is to promote theory and practice. In addition to the peer¬reviewed original research papers, the Editorial Board welcomes original research reports, modern surveys and communications in a broadly defined field of technical and natural sciences.

Инфраструктурные перегрузки как дисбаланс городской среды// Journal of Technical and Natural Sciences 5(14), 2019/ RELF Group & OEAPS Inc.(Open European Academy of Public Sciences); Chief Editor Vitaly Yakovlev- Berlin, Germany. 26.09.2019: OEAPS Inc., 2019. - PP. 37-43.

2019 ◽  
Author(s):  
Татьяна Андреевна Водчиц
Keyword(s):  
Urban Environment ◽  
Chief Editor ◽  
Natural Sciences ◽  
Social Infrastructure ◽  
European Academy ◽  
The Social ◽  
Global Problems ◽  
The City

В предложенной статье поднята на рассмотрение общераспространённая проблематика напряженного состояния социальной инфраструктуры города на примере Москвы. Также берется к рассмотрению тот факт, что растущая инфраструктура – одна из глобальных проблем мегаполиса. Выявлены основные причины формирования дисбаланса городской среды. Предложен ряд способов возможного решения данной задачи.In the proposed article, the widespread problems of the tense state of the social infrastructure of the city are raised for consideration. Also taken into consideration is the fact that the growing infrastructure is one of the global problems of the metropolis. The main causes of the imbalance of the urban environment are revealed. A number of possible solutions to this problem are proposed.

Journal of Technical and Natural Sciences 2(11), 2019/ OEAPS Inc.(Open European Academy of Public Sciences); Chief Editor Vitaly Yakovlev- Berlin, Germany. 26.02.2019: OEAPS Inc., 2019. - 87 P.

2019 ◽  
Author(s):  
Саида Адиловна Низамова ◽  
Alina Evgenievna Averina ◽  
Руслан Сергеевич Решетов ◽  
Дмитрий Алексеевич Погожев ◽  
Мария Михайловна Кошелькова ◽  
...  
Keyword(s):  
Chief Editor ◽  
Natural Sciences ◽  
Theory And Practice ◽  
Original Research ◽  
Research Papers ◽  
European Academy ◽  
Constant Interest ◽  
Critical Reviews

Authoritative and critical reviews of the latest achievements of natural and technical disciplines are published by Journal of Technical and Natural Sciences. Journal of Technical and Natural Sciences, an international peerreviewed journal, publishes both theoretical and experimental highquality documents of constant interest, previously unpublished in journals, in the field of technical and natural sciences, whose purpose is to promote theory and practice. In addition to the peerreviewed original research papers, the Editorial Board welcomes original research reports, modern surveys and communications in a broadly defined field of technical and natural sciences

STRUCTURAL TRANSFORMATIONS OF CARBON NANOMATERIAL UNDER INFLUENCE OF HIGH ENERGY LASER IRRADIATION

2019 ◽  
Vol 62 (1-2) ◽  
pp. 171-180
Author(s):  
P.E. Pavlyuchenko ◽  
G.M. Seropyan ◽  
M.V. Trenikhin ◽  
V.A. Drozdov
Keyword(s):  
Heating Temperature ◽  
High Energy ◽  
Carbon Nanomaterial ◽  
Turbostratic Carbon ◽  
Graphene Layers ◽  
Nanostructured Particles ◽  
Maximum Heating Temperature ◽  
Energy Laser ◽  
High Energy Laser ◽  
Maximum Heating

Laser pulse irradiation of the globular turbostratic carbon material in various conditions was carried out in this work. It was investigated by TEM that the formation of nanostructured particles (nanocapsules) during irradiation at 1064 nm wavelength occurs with power density of 108 W/cm2, and it’s rise up to 1011 W/cm2 leads to increase the degree of ordering of the obtained structures. It is shown that irradiation of the initial globules with pulses at 532 nm wavelength allows to reduce the interplanar spacing of graphene layers from 0,410 nm to 0,346 nm in the formed nanocapsules. The dependence of the maximum heating temperature of nanoparticles on the energy density on the laser spot was analyzed. The influence of the heating temperature of the carbon nanomaterial on structure and morphology was stated.

scholarly journals Influence of Operating Parameters on the Performance of an Adsorption Solar Refrigeration Machine

2021 ◽  
Author(s):  
adnane ghrici ◽  
MEA GHERNAOUT ◽  
Mohammed BENRAMDANE
Keyword(s):  
Thermodynamic Parameters ◽  
Air Conditioning ◽  
Heating Temperature ◽  
Adsorption Refrigeration ◽  
Different Types ◽  
Maximum Heating Temperature ◽  
Low Performance ◽  
Maximum Heating ◽  
Solar Refrigeration ◽  
Refrigeration Machine

Abstract Renewable energies including solar energy requirements for refrigeration and air conditioning are increasingly gaining interest due to the refrigerants friendly to the environment. However, it was found that these technologies have some limitations like the low performance and their high cost. This paper proposes a comparative study of a solar adsorption refrigeration machine. The study consists in determining the optimal thermodynamic parameters of operation as well as their influences on the performance of the system. This is based on a thermodynamic model using different types of adsorbent / adsorbate pairs. The main parameters considered in this study are: temperature of generation, evaporation, maximum heating temperature, condensation pressure as well as the type of the pair used: activated carbon / methanol and zeolite / water. Simulations for different thermodynamic parameters show that the COP is very sensitive to the generation and evaporation temperatures as well as the maximum heating temperature, on the other hand it was slightly influenced by the condensation pressure. The results obtained have shown that the AC / methanol pair is more profitable than the zeolite / water pair.

scholarly journals Nanostructured SiGe:Sb solid solutions with improved thermoelectric figure of merit

2020 ◽  
Author(s):  
Mikhail Vladimirovich Dorokhin ◽  
Polina Borisovna Demina ◽  
Irina Viktorovna Erofeeva ◽  
Yuri Mikhailovich Kuznetsov ◽  
Anton Vladimirovich Zdoroveyshchev ◽  
...  
Keyword(s):  
Solid State ◽  
Figure Of Merit ◽  
Heating Temperature ◽  
Thermoelectric Figure Of Merit ◽  
Thermoelectric Figure ◽  
Plasma Sintering ◽  
Solid State Sintering ◽  
Maximum Heating Temperature ◽  
Spark Plasma ◽  
Maximum Heating

Abstract Thermoelectric Si 0,65 Ge 0,35 Sb δ materials have been fabricated by spark plasma sintering of Ge-Si-Sb powder mixture. The electronic properties of Si 0,65 Ge 0,35 Sb δ were found to be dependent on the uniformity of mixing of the components, which in turn is determined by the maximum heating temperature during solid-state sintering. Provided the concentration of donor Sb impurity is optimized the thermoelectric figure of merit for the investigated structures can be as high as 0.628 at the temperature of 490 °С, the latter value is comparable with world-known analogues obtained for Si 1- x Ge x P δ .

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