Improving the Efficiency of Electricity Consumption in Changing Power Quality Conditions

Это исследование посвящено анализу режимов работы действующих электрических сетей, осуществляющих питание различных групп потребителей. Установлено, что различный характер электропотребления приводит к существенному изменению норм качества электрической энергии, несоблюдение которых сопровождается значительными энергетическими затратами и нарушает условия электромагнитной совместимости технических средств в единой электромагнитной среде. Предложено новое техническое средство минимизации последствий указанных нарушений. Разработаны методы и программные расчеты показателей качества электрической энергии в условиях отсутствия и применения средства минимизации указанных искажений. Представлено имитационное моделирование влияния разработанного технического средства на нормы качества электрической энергии и энергетические потери в реальной действующей электрической сети низкого напряжения, питающей автозаправочную станцию, расположенную в сельской местности. Произведен анализ эффективности предлагаемого технического решенияThis study is devoted to the analysis of existing electrical network operating modes that provide power to various groups of consumers. It is established that the different nature of power consumption leads to a significant change in the standards of the power quality, the violation of which is accompanied by significant energy costs and violates the conditions of technical means electromagnetic compatibility in a single electromagnetic environment. A new technical means of minimizing these violations consequences is proposed. Methods and software tools have been developed for calculating the power quality indicators in the absence and use of means to minimize these distortions. Simulation modeling of the developed technical means influence on the quality norms of electric energy and energy losses in a real operating low-voltage electric network feeding a gas station located in rural areas is presented. The efficiency of the proposed technical solution is analyze

Психофизиологические корреляты представления движений творческого и не творческого характера у исследуемых с разным уровнем танцевального мастерства

The paper focuses attention on the importance of studying the psychophysiological correlates of the representations of creative and non-creative movements in respondents with various levels of dance skills. The developed methodological tools and the results obtained can be readily used in the development of methods and techniques of professional training of dancers, as well as psychological andpsychophysiological methods and techniques for the development of creativity in dancers, and carrying out a dance-expressive psychotherapy. The authors described the methodology and procedure of the empirical study. The study involved 60 persons at the age from 18 to 25. The sample included 20 professional dancers with a high level of skill in variety and sports dance; 20 novice dancers with a basic experience in the field of variety and sports dance; 20 personswithout any experience in dance or other sports (control group) at a professional or amateur level. In this study, the respondents had to represent creative (an original dance improvisation) and non-creative (a bridge and somersaults back) movements. The study used the method of electroencephalography. The authors studied the strength and character of the distribution of coherence connections of thecerebral cortex in respondents when representing the movements. The results of the empirical study made it possible to distinguish psycho-physiological correlates of representation of the movements. The authors differentiated these correlates as follows: the main, which manifested themselves in all the respondents of the study,and do not depend on the nature of movements; variable, which reflect the level of professional dancing skills of respondents and the nature of the represented movement. High intra- and interhemispheric coherence in the theta, alpha1, and alpha2 ranges are the main components of the psycho-physiological correlates. Among the variable components the study revealed the EEG pattern in the betarange on the “axis of creativity” (between the front divisions of the right hemisphere and posterior divisions of the left one) in professional dancers when representing the creative movements.В статье обоснована актуальность изучения психофизиологических коррелятов представления движений творческого и не творческого характера у исследуемых с разным уровнем танцевального мастерства. Разработанный методический инструментарий и результаты исследования могут быть использованы при разработке методик и технологий профессионального обучения танцоров, при разработке психологических и психофизиологических методов и приемов развития творческого потенциала у танцоров, в проведении танцевально-экспрессивной психотерапии. Описаны методика и процедура проведения эмпирического исследования. В исследовании приняли участие 60 человек в возрасте от 18 до 25 лет, из них: 20 профессиональных танцоров, которые достигли высокого уровня мастерства в спортивно-эстрадных танцах; 20 начинающих танцоров, которые имеют только базовый опыт в спортивно-эстрадных танцах и не получили завершенной, всесторонней подготовки, и 20 человек, никогда не занимавшихся танцами или другими видами спорта (контрольная группа) на профессиональном или любительском уровне. В данном исследовании участникам предлагалось представить движения творческого и не творческого характера. В качестве представления движений не творческого характера выступило «представление мостика и переворота назад»; в качестве представления движений творческого характера – «оригинальный танец-импровизация». В исследовании применен метод электроэнцефалографии. Изучались сила и характер распределения когерентных связей коры головного мозга у участников исследования при представлении движений. Выделенные на основе результатов проведенного эмпирического исследования психофизиологические корреляты представления движений дифференцированы на основные, проявляющиеся у всех участников исследования и не зависящие от характера движений, и вариативные, отражающие уровень профессионального танцевального мастерства участника исследования и характер представляемого движения. К основным компонентам психофизиологических коррелятов отнесены высокая внутри- и межполушарная когерентность в тета-, альфа1,2-диапазонах. В рамках вариативных компонентов выявлен ЭЭГ паттерн при представлении движений творческого характера в бета-диапазоне по «оси творчества» (между передними отделами правого полушария и задними отделами левого) у профессиональных танцоров

A Device for Controlling Anbalancing Modes in Components of Low-Voltage Power Supply Systems

В статье рассматриваются вопросы влияния несбалансированного электропотребления на уровень несимметрии токов и напряжений в низковольтных системах электроснабжения и их компонентах. Доказано, что возникающая несимметрия трехфазной системы напряжения электропитания оказывает негативное влияние на показатели, характеризующие качество электрической энергии, а несимметрия токов в этих системах влечет за собой увеличение потерь мощности и энергии, что сопровождается увеличенным электропотреблением, повышением тепловой нагрузки, являющимся причиной возникновения пожаров, а также снижением уровня надежности электроснабжения. В качестве наиболее эффективного средства минимизации последствий несимметричных режимов предлагается новое техническое средство с автоматическим изменением его мощности за счет саморегулируемой индуктивности в зависимости от уровня несбалансированного электропотребления. На основании произведенных расчетов определены параметры и изготовлена физическая модель предлагаемого устройства, эффективность которой доказана путем экспериментальных исследований, произведенных в лабораторных условиях. Эффективность симметрирования достигает 60 %The article discusses the influence of unbalanced power consumption on the level of asymmetry of currents and voltages in low-voltage power supply systems and their components. It is proved that the resulting asymmetry of the three-phase power supply voltage system has a negative impact on the indicators characterizing the quality of electrical energy, and the asymmetry of currents in these systems entails an increase in power and energy losses, which is accompanied by increased power consumption, increased heat load, which is the cause of fires, as well as a decrease in the level of reliability of power supply. As the most effective means of minimizing the consequences of asymmetric modes, a new technical means is proposed with an automatic change in its power due to self-regulating inductance, depending on the level of unbalanced power consumption. Based on the calculations performed, the parameters were determined and a physical model of the proposed device was made, the effectiveness of which was proved by experimental studies performed in laboratory conditions. The symmetry efficiency reaches 60

Aqua­bis(3,5-dimethyl-1H-pyrazole-κN)(oxalato-κ2 O,O′)copper(II)

In the title compound, [Cu(C2O4)(C5H8N2)2(H2O)], the CuII atom is coordinated in a slightly distorted square-pyramidal geometry by two N atoms belonging to the two 3,5-dimethyl-1H-pyrazole ligands, two O atoms of the oxalate anion providing an O,O′-chelating coordination mode, and an O atom of the water mol­ecule occupying the apical position. The crystal packing shows a well defined layer structure. Intra-layer connections are realised through a system of hydrogen bonds while the nature of the inter-layer inter­actions is completely hydro­phobic, including no hydrogen-bonding inter­actions

Ferroelectric nanostructure having switchable multi-stable vortex states

A ferroelectric nanostructure formed as a low dimensional nanoscale ferroelectric material having at least one vortex ring of polarization generating an ordered toroid moment switchable between multi-stable states. A stress-free ferroelectric nanodot under open-circuit-like electrical boundary conditions maintains such a vortex structure for their local dipoles when subject to a transverse inhomogeneous static electric field controlling the direction of the macroscopic toroidal moment. Stress is also capable of controlling the vortex\u27s chirality because of the electromechanical coupling that exists in ferroelectric nanodots

Assessment of the role of the state in the management of mineral resources

Mineral resources as natural capital can be transformed into human, social and physical capital, that guarantees the sustainable development of a country, exclusively through professional public management. Public management of a country's mineral resource potential is seen as an element of transnational governance. Regulation involves the use of laws, rules and regulations within the jurisdictional and sectoral capabilities of the state, minimizing its involvement as a producer. The features of the ideology of economic liberalism, which polarizes the societies of raw material producing countries by imposing austerity, as well as lowering trade barriers have been studied. The analysis of the influence of the radical new order of neoliberal world ideology on the development of the extractive sector and the strengthening of state regulation has been presented

Enhanced electric conductivity at ferroelectric vortex cores in BiFeO3

In many large ensembles, the property of the system as a whole cannot be understood from studying the individual entities alone ¿ these ensembles can be made up by neurons in the brain, transport users in traffic networks or data packages in the Internet. The past decade has seen important progress in our fundamental understanding of what such seemingly disparate 'complex systems' have in common; some of these advances are surveyed here

Molecular evolution of cyclin proteins in animals and fungi

<p>Abstract</p> <p>Background</p> <p>The passage through the cell cycle is controlled by complexes of cyclins, the regulatory units, with cyclin-dependent kinases, the catalytic units. It is also known that cyclins form several families, which differ considerably in primary structure from one eukaryotic organism to another. Despite these lines of evidence, the relationship between the evolution of cyclins and their function is an open issue. Here we present the results of our study on the molecular evolution of A-, B-, D-, E-type cyclin proteins in animals and fungi.</p> <p>Results</p> <p>We constructed phylogenetic trees for these proteins, their ancestral sequences and analyzed patterns of amino acid replacements. The analysis of infrequently fixed atypical amino acid replacements in cyclins evidenced that accelerated evolution proceeded predominantly during paralog duplication or after it in animals and fungi and that it was related to aromorphic changes in animals. It was shown also that evolutionary flexibility of cyclin function may be provided by consequential reorganization of regions on protein surface remote from CDK binding sites in animal and fungal cyclins and by functional differentiation of paralogous cyclins formed in animal evolution.</p> <p>Conclusions</p> <p>The results suggested that changes in the number and/or nature of cyclin-binding proteins may underlie the evolutionary role of the alterations in the molecular structure of cyclins and their involvement in diverse molecular-genetic events.</p

Potential of Core-Collapse Supernova Neutrino Detection at JUNO

JUNO is an underground neutrino observatory under construction in Jiangmen, China. It uses 20kton liquid scintillator as target, which enables it to detect supernova burst neutrinos of a large statistics for the next galactic core-collapse supernova (CCSN) and also pre-supernova neutrinos from the nearby CCSN progenitors. All flavors of supernova burst neutrinos can be detected by JUNO via several interaction channels, including inverse beta decay, elastic scattering on electron and proton, interactions on C12 nuclei, etc. This retains the possibility for JUNO to reconstruct the energy spectra of supernova burst neutrinos of all flavors. The real time monitoring systems based on FPGA and DAQ are under development in JUNO, which allow prompt alert and trigger-less data acquisition of CCSN events. The alert performances of both monitoring systems have been thoroughly studied using simulations. Moreover, once a CCSN is tagged, the system can give fast characterizations, such as directionality and light curve