bluuebunny/crossref_metadata_2025 huggingface dataset:
Variants of uric acid metabolism and their immune and microbiota accompaniments in patients with neuroendocrine-immune complex dysfunction
Authors: Smagliy Vadym S. , Gozhenko Anatoliy I. , Knyazeva I. , Badiuk Nataliya S. , Zukow Walery , Kostylev M. , Popovych Igor L.
Published: March 2020

Background. Previously, we found a wide range of uric acid exchange parameters and functional relationships of uricemia and uricosuria with the parameters of immunity in healthy rats analyzed. We continued our research along the same lines in the clinical observation of patients, who came to the Truskavets’ spa for the rehabilitation treatment. Relationships between uricemia and uricosuria, on the one hand, and immunity and microbiota parameters, on the other hand, have been identified. The purpose of this study is to further explore these relationships using the cluster and discriminant analyses. Material and Methods. The object of observation were 34 men and 10 women aged 24-70 years old, who came to the Truskavets’ spa for the rehabilitation treatment of chronic pyelonephritis combined with cholecystitis in remission. The serum and daily urine levels of the uric acid by uricase method were determined. Immune status evaluated on a set of I and II levels recommended by the WHO. The condition of microbiota is evaluated on the results of sowing of feces and urine. Results. Cluster analysis revealed 4 variants of uric acid metabolism by deviating uricosuria and uricemia from the norm in Z-scores. In 34% of individuals, moderate hypouricosuria (-0,97±0,11 Z) is combined with a lower borderline uricemia (-0,53±0,20 Z). In 25% of patients, lower-border uricemia (-0,70±0,22 Z) is accompanied by marked hyperuricosuria (+3,87±0,25 Z). In 24% of people, moderately elevated uricosuria (+1,26±0,14 Z) is combined with completely normal uricemia (+0,09±0,16 Z). Finally, in 17%, a similar level of uricosuria (+1,17±0,19 Z) is combined with marked hypouricemia (-1,89±0,14 Z). Discriminant analysis revealed 12 parameters of immunity and 5 parameters of microbiota, by which the clusters of uric acid metabolism are identified with 94,3 %% accuracy.Conclusion. Endogenous uric acid has a modulating overall beneficial effect on a number of immune and microbiota parameters in both healthy rats and people with neuroendocrine-immune complex dysfunction on background of chronic inflammatory diseases.
Beyond the catalyst: how electrode and reactor design determine the product spectrum during electrochemical CO2 reduction
Authors: Wessling Matthias
Published: March 2020

As a remedy to the increasing concentration of greenhouse gases and depleting fossil resources, the electrochemical CO2 reduction closes the carbon cycle and provides an alternative carbon feedstock to the chemical and energy industry. While most contemporary research focuses on the catalyst activity, we emphasize the importance of the reactor design for an energetic efficient (EE) conversion. A design strategy for an electrochemical membrane reactor reducing CO2 to hydrogen, carbon monoxide (CO) and ethylene (C2H4) is developed. We present the stepwise development from an H-cell like setup using full-metal electrodes to a cell with gas diffusion electrodes (GDE) towards high current efficiencies (CE) at high current densities (CD). At 300 mA.cm−2 a CO-CE of 56% for a Ag GDE and a C2H4-CE of 94% for a Cu GDE are measured. The incorporation of the developed GDEs into a zero-gap assembly eliminates ohmic losses and maximizes EE, however the acidic environment of the ion exchange membrane inhibits CO2 reduction. As a compromise a thin liquid buffer layer between cathode and membrane is a prerequisite for a highly active conversion. We demonstrate that industrial relevant CDs with high CEs and EEs can only be achieved by moving beyond today’s research form catalyst development only to an integrated reactor design, which allows to exploit the viable potential of electrochemical CO2 reduction catalysts.
Review Decrease Polyphenols, Ethanol, Lactic Acid, and Acetic Acid during Fermentation with Addition of Cocoa Beans Innoculum
Authors: bin sugeng rijanto mulono apriyanto
Published: March 2020

Decrease Polyphenols, Ethanol, Lactic Acid, and Acetic Acid during Fermentation withAddition of Cocoa Beans Innoculum
Mối liên hệ giữa sự thỏa mãn các nhu cầu tâm lý cơ bản, động lực học tập, và trì hoãn học tập ở sinh viên [The relationships between the satisfaction of basic psychological needs, academic motivation, and academic procrastination among students]
Authors: Nguyen Quang Ngoc , La Thuy-Tien Thi , Phan Mai Thi , Ninh Thuy-Dung
Published: March 2020

Nghiên cứu được tiến hành dựa trên lý thuyết tự quyết nhằm tìm hiểu về mối liên hệ giữa sự thỏa mãn các nhu cầu tâm lý cơ bản, động lực học tập, và trì hoãn trong học tập ở sinh viên. Mẫu nghiên cứu là mẫu thuận tiện với 341 sinh viên có độ tuổi trong khoảng từ 19 đến 26. Trong đó, nam chiếm 11.7% và nữ chiếm 88.3%. Mức độ thỏa mãn các nhu cầu tâm lý cơ bản, các loại động lực học tập, và mức độ trì hoãn trong học tập được đo lường bởi các thang đo. Kết quả phân tích tương quan cho thấy trì hoãn trong học tập có tương quan nghịch chiều với các loại động lực học tập tự chủ và mức độ thỏa mãn các nhu cầu tâm lý cơ bản. Phân tích đường dẫn cho thấy sự thỏa mãn nhu cầu gắn kết và nhu cầu tự chủ góp phần làm tăng sự thỏa mãn nhu cầu năng lực, qua đó làm giảm tình trạng thiếu động lực học tập đồng thời làm tăng động lực hướng đến thành tựu, và dẫn tới mức độ trì hoãn học tập thấp hơn. Các kết quả nghiên cứu ửng hộ giả thuyết của lý thuyết tự quyết về vai trò của việc đáp ứng các nhu cầu tâm lý cơ bản nhằm thúc đẩy động lực bên trong. [The study was conducted based on the self-determination theory to examine the relationships between the satisfaction of basic psychological needs, academic motivation, and academic procrastination among students. The sample was a convenient ?one with 341 students aged between 19 and 26. In particular, males accounted for 11.7% and females accounted for 88.3%. The level of satisfaction of basic psychological needs, the types of academic motivation, and the level of academic procrastination were measured by several scales. The results of correlation analysis showed that the academic procrastination was negatively correlated with autonomous academic motivations and the level of the satisfaction of basic psychological needs. Path analysis showed that the satisfaction of relatedness and autonomy needs contributed to the satisfaction of competence need, thereby reducing amotivation and increasing intrinsic motivation towards achievement which lead to lower levels of academic procrastination. The findings supported the hypothesis of self-determination theory about the role of meeting basic psychological needs in order to promote intrinsic motivation.]
Cẩm nang ứng phó với stress học tập dành cho sinh viên
Authors: Nguyen Quang Ngoc , Nguyen Chi Linh , Van Nguyen Luot
Published: March 2020

Cẩm nang ứng phó với stress trong học tập dành cho sinh viên là một trình bày trực quan về các nguồn gây stress, các hệ quả mà sinh viên có thể sẽ phải đối mặt đồng thời cung cấp một danh sách các cách thức ứng phó cũng như phân tích hệ quả tích hệ quả tích cực hay tiêu cực của các cách ứng phó này dựa trên một nghiên cứu được thực hiện bởi nhóm tác giả Nguyễn Ngọc Quang và Nguyễn Linh Chi dưới sự hướng dẫn của PGS. TS. Nguyễn Văn Lượt thuộc trường Đại học Khoa học Xã hội và Nhân văn, Đại học Quốc gia Hà Nội.
Mối liên hệ giữa ứng phó với stress học tập, mức độ stress, và kết quả học tập của sinh viên [The relationships between coping with academic stress, stress level, and GPA among students]
Authors: Nguyen Quang Ngoc , Nguyen Chi Linh
Published: March 2020

Nghiên cứu này được tiến hành dựa trên mô hình Lý thuyết Tương tác về Stress nhằm tìm hiểu về hệ quả của các chiến lược ứng phó của sinh viên khi đối mặt với stress học tập thông qua hai biến số là mức độ stress và kết quả học tập của sinh viên. Mẫu nghiên cứu thuận tiện gồm 157 sinh viên trường Đại học Khoa học Xã hội và Nhân văn, Đại học Quốc gia Hà Nội với độ tuổi trung bình là 20.52, độ lệch chuẩn là 1.29, và nữ chiếm 77.70%. Kết quả nghiên cứu chỉ ra rằng các chiến lược ứng phó điều hòa cảm xúc, chấp nhận, thay đổi nhận thức, và suy nghĩ tích cực có tương quan nghịch có ý nghĩa thống kê với mức độ stress, trong khi hai chiến lược ứng phó né tránh và mong ước có mối tương quan thuận với mức độ stress của sinh viên. Đối với kết quả học tập, chiến lược ứng phó giải quyết vấn đề có liên hệ tích cực đối với điểm số của sinh viên, trong khi chiến lược ứng phó né tránh và mong ước làm giảm kết quả học tập.
The impact of threat to personal control on trust in experts and non-experts communicating about risk
Authors: van Harreveld Frenk , Rutjens Bastiaan T
Published: March 2020

In the present research we shed light onto processes that may contribute to the decline in trust in experts and other authorities. In a study focusing on the risks of nanotechnology in food, we orthogonally manipulated personal control (high vs low), the expertise of a source communicating about the risks (high vs low) and the extent to which the source communicated with certainty or uncertainty. The main dependent measures were perceptions of ability and trust as well as risk attitudes. The results show perceptions of ability and overall trust were higher for an expert than for a non-expert source, but only when personal control was threatened and the source communicated certainty. When this was not the case, there was no difference in perceived ability or overall trust between the expert and non-expert source. The pattern of results for risk attitudes was similar. Implications for risk communication by experts are discussed.
Mối liên hệ giữa sự ủng hộ tính tự chủ của cha mẹ đối với lòng tự trọng, niềm tin vào năng lực của bản thân, và cảm xúc ở học sinh THPT [The association between parental autonomy support and offsprings' self-esteem, self-efficacy, and affects among high school students]
Authors: Bui Bich Thi , Hoang Thao Thi , Nguyen Quang Ngoc
Published: March 2020

Nghiên cứu được thực hiện dựa trên lý thuyết Tự quyết nhằm tìm hiểu mối liên hệ giữa sự ủng hộ tính tự chủ và kiểm soát tâm lý của cha mẹ đối với con cái và lòng tự trọng, niềm tin vào năng lực của bản thân và cảm xúc ở học sinh THPT. Mẫu nghiên cứu là mẫu thuận tiện bao gồm 262 học sinh trung học phổ thông. Kết quả nghiên cứu cho thấy sự ủng hộ tính tự chủ có tương quan thuận chiều với niềm tin vào năng lực của bản thân, lòng tự trọng và cảm xúc tích cực. Trong khi đó, kiểm soát tâm lý có tương nghịch với lòng tự trọng và tương quan thuận với cảm xúc tiêu cực nhưng không có tương quan với niềm tin vào năng lực của bản thân và cảm xúc tích cực như giả thuyết ban đầu. Phân tích mô hình đường dẫn cho thấy lòng tự trọng và niềm tin vào năng lực bản thân có thể lý giải phần nào ảnh hưởng của sự ủng hộ tính tự chủ và kiểm soát tâm lý của cha mẹ đối với cảm xúc của con cái. Nói cách khác, những học sinh được cha mẹ ủng hộ tính tự chủ thì có lòng tự trọng cao hơn, niềm tin và năng lực cao hơn, có nhiều cảm xúc tích cực hơn và ít cảm xúc tiêu cực hơn. Ngược lại, những học sinh có cha mẹ sử dụng các cách thức kiểm soát tâm lý thì có lòng tự trọng thấp và có nhiều cảm xúc tiêu cực. Các kết quả gợi ý cho cha mẹ cách nuôi dạy con nhằm đem lại những hệ quả tích cực về tâm lý xã hội ở con cái.
Multisensory binding is driven by the strength of stimulus correlation
Authors: Nidiffer Aaron , Ramachandran Ramnarayan , Wallace Mark
Published: March 2020

Our perceptual system is adept at exploiting sensory regularities to better extract information about our environment. One clear example of this is how the sensory and multisensory systems can utilize consistency to group sensory features into a perceptual object and segregate objects from each other and background noise. Leveraging tenets of object-based attention and multisensory binding, we sought whether this ability scaled with the strength of that consistency. We presented participants with amplitude modulated (AM) auditory and visual streams and asked them to detect imbedded orthogonal, near-threshold frequency modulation (FM) events. We modulated the correlation of the streams by varying the phase of the visual AM. In line with a previous report, we first observed peak performance that was shifted from 0°. After accounting for this, we found that across participants discriminability of the FM event linearly improved with correlation. Additionally, we sought to answer a question left dangling from our previous report as to the possible explanation for the phase shift. We found that phase shift correlated with auditory and visual response time differences, but not point of subjective simultaneity, suggesting differences in sensory processing times may account for the observed phase shift. These results suggest that our perceptual system can bind multisensory features across a spectrum of temporal correlations, a process necessary for multisensory binding in complex environments where unrelated signals may have small errant correlations.
A nested computational social science approach for deep-narrative analysis in energy policy research
Authors: Debnath Ramit , darby Sarah , Bardhan Ronita , Mohaddes Kamiar , Sunikka-Blank Minna
Published: March 2020

Text-based data sources like narratives and stories have become increasingly popular as critical insight generator in energy research and social science. However, their implications in policy application usually remain superficial and fail to fully exploit state-of-the-art resources which digital era holds for text analysis. This paper illustrates the potential of deep-narrative analysis in energy policy research using text analysis tools from the cutting-edge domain of computational social sciences, notably topic modelling. We argue that a nested application of topic modelling and grounded theory in narrative analysis promises advances in areas where manual-coding driven narrative analysis has traditionally struggled with directionality biases, scaling, systematisation and repeatability. The nested application of the topic model and the grounded theory goes beyond the frequentist approach of narrative analysis and introduces insight generation capabilities based on the probability distribution of words and topics in a text corpus. In this manner, our proposed methodology deconstructs the corpus and enables the analyst to answer research questions based on the foundational element of the text data structure. We verify the theoretical and epistemological fit of the proposed nested methodology through a meta-analysis of a state-of-the-art bibliographic database on energy policy and computational social science. We find that the nested application contributes to the literature gap on the need for multidisciplinary polyvalence methodologies that can systematically include qualitative evidence into policymaking.
GENDER ROLE NORM CONFORMITY AND SEXUAL ASSAULT RISK AMONG MALE AND FEMALE UNIVERSITY STUDENTS
Authors: Depraetere Joke , Vandeviver Christophe , Keygnaert Ines , Beken Tom Vander
Published: March 2020

Scholars have established various risk factors that increase the risk of sexual victimization (SV) among college students. However, little research has focused on gender norm conformity as a risk factor of SV. Addressing this gap in the literature, we conducted a study with 322 men and 815 female university students. Over 51% of women and 23% of men indicated experiencing some form of SV in their lives. Logistic regression analyses revealed various gender differences and established that gender norms predict SV while controlling for established risk factors. We discuss these findings and their implications for prevention measures of SV.
Kapazitätsplanung skalierbarer Produktionssysteme
Authors: Niemann Jens , Schlegel Andreas , Putz Matthias
Published: March 2020

Kurzfassung

Elektromobilität ist durch hohe Nachfrageunsicherheiten und volatile Volumenprognosen geprägt. Um diese zu bewältigen, werden skalierbare Produktionssysteme eingesetzt. In dem Beitrag wird einerseits eine Methode zum Einsatz der Skalierbarkeit entwickelt und andererseits der Einfluss der Produktionsautomatisierung auf die Skalierbarkeit untersucht. Die Ergebnisse zeigen, dass bei einem niedrigeren Automatisierungsgrad ein frühzeitiger und hoher Einsatz der Skalierbarkeit zu ökonomischeren und flexibleren Produktionen führt. Dieser Effekt nimmt mit steigendem Automatisierungsgrad ab.
Der Industrie-4.0-Leitfaden für kleine und mittlere Unternehmen
Authors: Axmann Bernhard , Harmoko Harmoko
Published: March 2020

Kurzfassung

Im ersten Teil der dreiteiligen Veröffentlichung wurde in der ZWF-Ausgabe (2020) 1/2 das Thema „Daten” erläutert. Hierbei ging es um die Datenqualität, Datenaustausch, Datenverarbeitung, und Datenspeicherung. Das zweite Thema ist die „Software und Verarbeitungsprozess”, die ausfolgenden Kategorien bestehen: Produktdesign und -entwicklung, intelligente Materialplanung, intelligente Produktion, intelligente Wartung. Diese spiegeln die einzelnen Geschäftsprozesse wieder, welche digitalisiert werden sollen. Im dritten Teil soll im Heft 2020–04 auf die Themen externe Logistik und Hardware eingegangen werden
Modeling of the modes of natural gas transportation by main gas pipelines in the conditions of underloading
Authors: Vasyliv О. B. , Titlov О. S. , Sagala Т. А.
Published: March 2020

The current state of transit of natural gas through the Ukrainian gas transmission system (GTS) is estimated in the paper. The prerequisites for further reduction of the GTS load in the coming years are considered, in particular in the direction of Europe through the gas measuring station "Orlivka" (south direction), taking into account the construction of alternative bypass gas pipelines. On the basis of the review of literature sources on the problem of efficient operation of gas pipelines under conditions of underloading, a method for determining the capacity and energy consumption of the gas pipeline for a given combination of working gas pumping units (GPU) was developed. The Ananyev-Tiraspol-Izmail gas pipeline at Tarutino-Orlivka section was selected as the object of research. The methodology includes the calculation of the physical properties of gas by its composition, the calculation of gas compression, the calculation of the linear part, the gas flow to the compressor station's own needs, and the calculation of the total power of the gas-pumping units under the specified technological limitations. With the help of the original software developed in the MATLAB programming language, cyclical multivariate calculations of the capacity and energy consumption of the gas pipeline were carried out and the operating modes of the compressor shop were optimized in the load range from 23 ... 60 million m3/day. Optimization criterion is the minimum total capacity of the GPU. Variable parameters at the same time are the speeds of the superchargers, different combination of working GPU, load factor. According to the results of the optimization graphical dependences were constructed: the optimum frequency of the rotor of the supercharger on the performance of the pipeline; changes in power and pressure depending on the performance of the pipeline when operating a different combination of superchargers. Recommendations have been developed to minimize fuel gas costs at the compressor station.
Development of construction and analysis of the elastic shells packet stability of the device for well trajectory management
Authors: Oleksiuk М. P. , Rachkevych R. V. , Yatsyniak І. І. , Rachkevych І. О. , Ivasiv V. М.
Published: March 2020

Overview of equipment for management of a trajectory of directional and horizontal wells during drill process was done in the article. Both domestic and foreign equipment are described. Based on the critical analyses, most promising designs were chosen and were described their base disadvantage: restriction of range of changing of curvature angle of deflecting tool through some design features. Based on mentioned above, modern device for management of directional and horizontal wells trajectory was suggested. Advanced unit for curvature of deflecting tool’s axle is fundamentals of construction. Using of the elastic shells packet that loses stability by critical axial load and gets small longitudinal deformation is the main innovation. Further, it is a reason of unlocking the mutual movement of specific elements of the device and buckling of its axis on preset angle. That’s why angle of deflecting tool curvature does not depend of absolute longitudinal deformation of the elastic shells packet and, as result, is not restricted by them. Deflecting tool’s axis gets the rectilinear shape after a drill string is torn off from a downhole. So, there is possible to manage a well axis during drilling process using stretching and compression of the deflecting tool. The elastic shells packet that consists of variable quantity of shells is used for setting necessary compression force that switches device in regime of curvature. Stability of the packet was analyzed by 3D-modeling and finite element method. The magnitude of critical force is determined depending on the number of shells in the packet. Was mentioned, this dependence is rectilinear. There is a possibility, by selecting the number of shells in the elastic shells packet, to manage magnitude of axial compression force that causes bend of the deflecting tool’s axis considering needed bit load.
The reasoning of prospects of oil and gas bearing capacity of Cretaceous deposits of the Outer zone of Carpathian foredeep
Authors: Mikhayliv І. R. , Boiko А. P.
Published: March 2020

Although the Outer zone of the Precarpathian foredeep is one of the oldest gas extraction regions of Ukraine it is still promising for the exploration of new oil and gas deposits. The main gas deposits are open here in the Miocene, but the number of unidentified structures is rapidly shrinking. The development of unexplored Cretaceous deposits and the possibility of opening up their deposits of oil and gas can provide an increase in the resource base. In this case, the importance of the prospects of oil and gas bearing capacity of Cretaceous deposits is determined by a set of criterion features, including the determination of the nature of collectors and caprocks distribution, the establishment of favorable hydrogeological, structural and tectonic conditions for the formation and conservation of oil and gas deposits. The substantiated oil and gas prospect increases the search engine success, and therefore the development of the hydrocarbon potential of the Cretaceous deposits of the Outer zone can make a significant contribution to the fuel and energy supply of Ukraine with its own raw materials. Generalization, systematization, and analysis of new and reinterpretation of previously performed geological and geophysical studies and the results of deep drilling made it possible to substantiate the reliable geological structure of the cretaceous deposits of the studied region, which will increase the efficiency of prediction of oil-and-gas saturation and determine the priority oil and gas prospecting objects for detailed geological and geophysical works in order to search for new oil and gas deposits. Research results will increase the efficiency of search work, and the growth of promising and projected resources will be a significant contribution to the task of stabilizing and increasing oil and gas production in Ukraine.
The Influence of the Jet Pump Geometry on its Main Technological Parameters
Authors: Dubei O. Ya.
Published: March 2020

In order to test the operational efficiency of jet pumps which are installed at different depths in artificial lift-ed oil wells, it is necessary to establish the relation between their geometry and the maximum achievable operat-ing parameters. For this purpose, a series of experimental laboratory studies is conducted. Their main task is to identify the optimal parameters of a jet pump that works with gas-liquid flows. In the experimental setup, the fluid is supplied by an electric centrifugal pump and the air is injected by a compressor. The setup provides the possibility to regulate the fluid pressure before and after the jet pump, as well as the pressure and gas supply at its inlet. The basic parameters of the setup are calculated according to the criteria of the resemblance to real wells. The influ-ence of the jet pump geometry on its working parameters is estimated by replacing its main elements (nozzle, mix-ing chamber, diffuser). For each of the suggested designs of the jet pump, the pressure and the flow rates in its main cross-sections are measured and their measurement values are compared. On the basis of this comparison the author finds the main regularities for choosing optimal geometry which provides maximum gas offtaking or minimum pressure losses. The basic results of the experimental study are presented in the form of graphical dependencies which allow to make conclusions about the operational efficiency of jet pumps.
The Investigation of the Composition of Pipeline Gas-liquid Flows and the Effect of Their Harmful Impurities on the Modes of Pumping, Energy Requirements of Transportation n
Authors: Doroshenko Ya. V. , Karpash О. М. , Hozhaiev B. N.
Published: March 2020

Based on the analysis of the composition of gas-liquid flows of various pipelines (trunk, field and gathering gas pipelines, oil pipelines, heat pipelines, water pipelines), it is established that diverse harmful impurities are contained in the interior of almost all operated metal pipelines, regardless of the purpose of pipelines use. In most cases, pipelines contain a complex multicomponent mixture of harmful impurities of various origins: gas conden-sate, water, machine oil, products of in-line corrosion, rock particles removed from the well, incrustation exfoliat-ed from the pipes, paraffins, various mineral salts, sludge deposits, sand, soil, biofilm, etc. The types and properties of distinctive harmful impurities positioned in the interior of various metal pipelines are described; the reasons for their presence in pipeline gas-liquid flows are determined. Depending on the purpose of the pipeline, harmful im-purities can be accumulated in its interior, be sedimentated on the internal walls or move in the flow of the trans-ported product. The parameters influencing significantly the accumulation in the interior of various pipelines and the sedimentation of various harmful impurities on the inner walls of pipelines are considered. Possible locations of their accumulation or sedimentation are presented. The analysis of the negative consequences that occur in the case of accumulation or sedimentation of harmful impurities in the interior of the pipelines, their movement along the pipeline and collision with the wall of shaped elements (bends, T-bends, adapters, etc.) is made. The author presents the main criteria according to which the hydraulic condition of pipelines polluted with harmful impuri-ties is evaluated, and on which energy requirements of transportation depend.
The Effect of Sand Plug at the Gas Well Bottom-hole on its Productive Characteristics
Authors: Kondrat R. М. , Dremliukh N. S.
Published: March 2020

The reasons that lead to the destruction of the bottomhole zone during the operation of wells with unstable reservoirs are considered. The negative effects of the sand carry-over from the formation into the wellbore are shown. The review of scientific and technical literature on the effect of the sand plug on well productivity is presented. It indicates that the studies have mainly considered oil wells, but the effect of the sand plug on well productivity has not been studied sufficiently. For most gas wells, Darcy's law is primarily violated while filtering gas to the bottom-hole of the well, especially at high gas flow rates. The authors have studied theoretically the effect of a sand plug at the bottom of a gas well with permeability variations on the productive characteristics.  According to the results of theoretical studies, the authors construct and analyze graphical dependencies in the form of the ratio of gas flow with and without a sand plug to the ratio of the reservoir permeability and the plug, on condition that the plug blocks the reservoir completely and the plug height exceeds the reservoir thickness. The scientists work a formula for indicating the flow rate of a gas well with a sand plug at the well bottom, on condition that the plug blocks the reservoir completely and the plug height exceeds the reservoir thickness while filtering gas in the reservoir according to the binominal law. On the basis of the research, it is established that on condition of the identical height of the sand plug and the identical ratio of reservoir permeability and the plug, the productivity of the gas well with the sand plug increases with the increase of the reservoir permeability. If the height of the plug exceeds the reservoir thickness, the flow rate of the gas well will be the smaller, the greater is the height of the sand plug compared to the reservoir thickness.
INVESTIGATION OF THE AMPLITUDE STABILITY RELATION OF A MATHEMATICAL MODEL OF A CENTRIFUGAL PUMP OF A PUMPING UNIT AS AN OBJECT OF CONTROL WITH A DEGREE OF GAS PRESSURE
Authors: Lahoida A. I. , Lahoida L. I.
Published: March 2020

Using the experimental data obtained intheprocesso fchange inthetime of the degree of increase in gas pressure, as well as the performance of the centrifugal supercharger of the gas pumping unit, . Digitization of graphs of change of degree of increase of pressure of gas, and also productivity of the centrifugal supercharger of gas-pumping unitis made with the help of software Graph2Digit. The digitization wasper formed with a sampling period of 0.3 s. The number of values forth edegree of increase of gaspressure, as well as the performance of the centrifugal pump gas pumping unitis 581 each.

The experimental data are divide dinto ranges (1 - 811 sec - 818 sec; 2 - 818 sec - 825 sec; 3 - 811 sec - 831 sec; 4 - 825 sec - 831 sec; 5 - 827 pp. - 832 pp .; 6 - 829 pp. - 831 pp.). In the course of the study, the mathematical expectation for each of the intervals, as well as the spectral density equation for the degree of gas pressure increase and the spectral density equation for the performance of the centrifugal supercharger of the gaspumping unit, were determined at appropriate intervals.

Using there lation between the spectral densitiesand the fact function of the Matlab software product, which factorizes fractional-rational expression, the gear function saredetermine date achinter valand the stability stocks are determine dusing the Nyquist criterion.

The plot of the stability reserve of the centrifugal supercharger of the gas pumping unit as an object of control from the mathematical expectation, which is obtained on the basis of the spectral density ratios, is made. This dependency is approximated by the CurveExpert Professional software to select the optimalma them at icalmodel.

From the set of results, the one with the high estcorrelation coefficient and the small eststandard error isselected.
PROBLEMS ISSUES OF REGULATORY PROVISION OF PRODUCTION ACTIVITY OF NATURAL GAS MARKETS
Authors: Klyun A. M. , Kogut G. M. , Karpash M. O. , Karpash О.М.
Published: March 2020

The formation of the modern Ukrainian natural gas market is accompanied by profound transformations of the national gas infrastructure: the creation and operation of new market operators, the redistribution of infrastructure facilities, the development and implementation of new requirements for the effective functioning of the entire system. At the same time, this requires from all parties a verified and balances strategy for the optimal implementation of all the obligations that Ukraine has undertaken to fully implement the requirements of the EU Third Energy Package, which aims to create an effective natural gas market based on the principles of free competition, proper consumer protection and security of supply. Despite the fact that the capacity of the Ukrainian gas transmission system and gas storages is one of the largest in Europe, the unbanding process has caused a number of threats in the area of regulatory support for production activities, requiring the consolidation of specialists' efforts to form optimal solutions to the problems that have arisen. In addition, the lengthy process of reforming and reorganizing the Ukrainian gas distribution system has led to a situation where the work of a natural gas distribution operator is facing a risk of imbalance in terms of inefficient standardization of the main areas of operation to meet the EU legislation requirements implemented in Ukraine. Therefore, to develop basic directions for the future work of gas infrastructure operators, it is necessary to take into account the acting capabilities of existing system for transportation, underground storage and gas distribution (taking into account the significant number of standardized indicators defined by the existing normative documents of the former USSR) and in accordance with the trends in the development of the European gas infrastructure introduce economically and technically feasible measures to standardize performance activities. Such works have to be incorporated into integrated research programs, during which regional and international trends are to be taken into account and adapted, the results of which will be the basis for future roadmaps and programs for the development of natural gas supply and distribution systems.
IMPROVING EFFICIENCY OF ELECTRICAL EQUIPMENT FOR ROAD TRANSPORT
Authors: Shevchuk M. Ya. , Hlad I. V. , Batsala Ya. V. , Kiianiuk O. I.
Published: March 2020

This paper presents the reasons for the increased level of automobile accumulators are given, the design of the start-charging device of increased reliability is considered. The most damaged nodes of the system of electrical equipment of motor vehicles are listed, the differentiation of elements from the standpoint of their structural reliability is shown, ways of increasing the reliability of the elements of the electrical equipment system are determined. It is shown that the main reasons for finding optimal modes of operation of vehicles electrical equipment are the economic factor, the impact on the environment, the need to reduce the dependence on the constant rise in price of petroleum products. Car lead acid batteries are starter batteries, that is, they do not involve deep discharge. As a result of the deep discharge of the battery on its plates, the phenomenon of sulfitation and shedding of the active mass. The longer the battery is discharged, the more active it becomes and the starter current decreases. Therefore, the issue of regular recharging of the battery and guaranteed starting of the internal combustion engine with a discharged battery is urgent. It is established that the causes of rapid discharge of the battery or reduction of its capacity may be the deviation of the electrolyte density from the recommended value, the sulfation of the plates and the shedding of their active mass, malfunction of the vehicle electrical equipment. Most serial chargers are not designed for starting a car engine, and specially designed models have a high price. The complexity and considerable volume of work on researching and predicting the reliability of the car electrical system requires the efforts of specialists, as well as the coordination and coordination of their activities by developing methodological recommendations first to address partial and then general issues of the problem. It is shown that quantitative indicators of the reliability of each element included in the system are of great importance when addressing issues related to the organization of maintenance, the establishment of overhaul terms and repair volumes of the car electrical system. The developed charger will reduce the time spent on starting the car engine during the cold period, as well as significantly increase the battery life due to its full charge.
ANALYSIS OF METHODS AND MEASURES OF MEASUREMENT OF HEAT OF COMBUSTION OF NATURAL GAS IN UKRAINE AND ABROAD
Authors: Shynkaruk K. M.
Published: March 2020

In connection with the increase in prices for natural gas, the urgent issue is to calculate not only the amount of gas consumed, but also its quality precisely with the consumer. The quality of gas is the compliance of its physicochemical parameters with established regulatory documents. With the current gas accounting and payment system in Ukraine, consumers using the same number of cubic meters receive different heat of combustion.

The paper analyzes the regulatory framework for assessing the energy performance of natural gas. The necessity of the transition to accounting for natural gas in energy units is substantiated. Existing methods and means for determining the calorific value of natural gas that are used in Ukraine and abroad are considered. Currently, direct and indirect methods are used to determine the calorific value of natural value of natural gas. The most common is the calculation method based on chromatographic analysis, the implementation of which requires expensive equipment. Other methods for determining the calorific value of natural gas is correlation. The essence of which is to establish the relationship between a certain physicochemical property of natural gas and calorific value, which can be established by experimental observations and based on theoretical analysis, which makes it possible to draw a conclusion about the calorific value of natural gas. Based on the analysis, it was found that currently there are no simple in design and not expensive means of controlling the qualitative characteristics of natural gas commercially available. Therefore, it is relevant to solve the problem of operational control of the quality of natural gas, through scientific justification, development and improvement of tools that enable the indirect accounting of the energy value of natural gas in accordance with global trends in energy accounting.

A correlation analysis was carried out to establish the relationship between the thermal conductivity and the calorific value of natural gas. The use of the thermocatalytic method for determining the calorific value of gas is proposed, which will allow designing a relatively cheap and easy-to-use device for monitoring the quality of natural gas specifically for the consumer.
Experimental investigation of the near-bit jet pump
Authors: Kryzhanivskyi Ye. I. , Panevnyk D. O.
Published: March 2020

The nature of the flow distribution in the hydraulic system of the near-bit jet pump has been analyzed. The peculiarities of searching the pumping station operating point have been shown and the equation for determining hydraulic losses in the elements of the ejection system has been given. Based on experimental studies, an error in the theoretical determination of the relative pressure of a jet pump has been established when using a known and advanced model of its working process. In contrast to the known method, the proposed model provides for the determination of the hydraulic resistance of the chisel flushing system,which is located in the area of mixed flow at the cost of working, not mixed flow. Improving the mathematical model of the ejection system allows to reduce the error of theoretical determination of the relative pressure of the jet pump.
Hydrophobization method and "Ramksis-2" material for the flow rate in crease in the watered oil wells
Authors: Babaev V. N. , Kaptsov I. I. , Nalyvaiko O. I.
Published: March 2020

In the article there is made an attempt to investigate the most effective methods of petrofeedback increasing and wells productivity in the conditions of Ukrainian oil and gas fields. Traditional methods petrofeedback increasing and new approaches of solving this problem, such as hydrophobization layer zones or the use of water-swellable polymers are also considered.Particular attention is given to the processing of studies of cores of flooded wells to determine the coefficient of permeability recovery after injection of hydrophobic suspension "Ramsinks-2". The material significantly increases the injectivity of the well, reduces the injection pressure by improving permeability of the formation. It is shown that the use of hydrophobic materials "Ramsinks-2" and "Silpan-SV" in wells allows almost completely restore the filtration characteristics of the producing formation by increasing the oil component in the oil-water mixture.
Remote monitoring of gas pipelines on the basis of magnetic elastic sensors of mechanical voltage
Authors: Tsyganchuk V. V. , Shlapak L. S. , Matviienkiv O. M. , Sydor P. Ya.
Published: March 2020

A method of controlling the stress state of gas pipelines with a four-pole magnetoanisotropic converter has been suggested. The Arduino hardware and software platform has been used to enhance the capabilities of the INI-1C basic mechanical stress measuring device. The system of remote monitoring for periodic measurements of pipeline voltages, accumulation and analysis of the received data has been described in order to provide objective information for making technological decisions.
Research of pressure influence in the gas supply system on the energy consuption level of gas devices
Authors: Pylypiv L. D. , Maslanych І. І.
Published: March 2020

There are investigated the influence of operating pressures in the gas supply system on the level of such energy indicators as efficiency, gas flow and gas overrun by gas equipment in residential buildings. There is established a relationship between the values of operating pressures in the gas supply system and the gas consumption level of household appliances. The causes of insufficient pressure in the gas networks of settlements are analyzed in the article. There is also developed an algorithm for calculating the change in the efficiency of gas appliances depending on the operational parameters of the gas network. It has been found that the most efficient operation of gas appliances is observed at an overpressure at the inlet of gas appliances of about 1200 Pa.To ensure the required quality of natural gas combustion among consumers and minimize gas consumption there are justified the following measures in the article: coordinating a domestic regulatory framework for assessing the quality of natural gas with international norms and standards; improving the preparation of gas coming from local wells before supplying it to gas distribution networks; auditing low pressure gas pipelines and reconstructing areas affected by corrosion; ensuring standard gas pressure in the network for the normal operation of domestic gas appliances; stating quality indicators of natural gas combustion by gas sales organizations.
Psychological aspects of motivation and job satisfaction of faculty members: the case of one state University in Kazakhstan
Authors: Almurzayeva Bibigul , Summers Danna , Davletkaliyeva Yelizaveta
Published: March 2020

Psychological aspects of motivation and job satisfaction are integral parts of the effective and productive operations of any organization. In the context of higher education,it is one of the spheres, where satisfaction of faculty members, as well as appropriate motivational environment, has the paramount value for the effectiveness of a higher education institution and the quality of educational services. This research aims to explore the psychological aspects of motivation and job satisfaction of faculty members of one state university in Kazakhstan. Questionnaires concerning the job satisfaction level and motivation were distributed among 232 faculty members of one state university in Kazakhstan. The research findings show that the vast majority of participants have a relatively high level of job satisfaction, despite the existence of factors that negatively influence on the job satisfaction level, such as inappropriate work schedule, salary issues, and dealings with administration. At the same time, it becomes evident that favorable social and psychological climate, as well as relationships with colleagues can be considered as the most important components of psychological aspects of faculty members’ motivation. This study provides recommendations that can increase the job satisfaction level of faculty members and improve motivational environment in higher education institutions.
Fascynacja jako kategoria komunikacji w internecie (na przykładzie rosyjskiego portalu rambler.ru)
Authors: Kiklewicz Aleksander
Published: March 2020

The subject of this article is fascination as a type of communicative influence on the addressees, the purpose of which is to attract or retain the attention to the message and/or its source. In public communication, fascination serves to activate the processing of semantic information, to create a positive image of the source of information and its preferences in the face of increasing market competition, the prolongation of communicative contact as an opportunity to distribute the advertising copies. Fascination is one of the definite characteristics of modern media culture. Fascination as a stylistic phenomenon is based on different means, which fall into four categories: the language code, the cognitive system (mental thesaurus, worldview), the system of social relations, and the physical environment. Semantic information is subordinated on the Internet to the principle of attractiveness. This concerns such its characteristics of it as the preference for events in the sphere of politics, occasionality, sensationalism, dangerous trains, intracultural attitude.
The European and Russian experience in the area of linguistic urban studies as a theoretical foundation for studies in Kazakhstan
Authors: Suyunova Gulnara
Published: March 2020

The article is an attempt to analyze the status of linguistic urban studies in Kazakhstan. The author compares the achievements of domestic linguists in this area of scientific knowledge with similar studies of foreign scientists and identifies options for using their experience for the development of Kazakhstan linguistic urban study. The strong linguo-communicative potential of modern cities is emphasized, providing scientists with an ever-growing scope of objects of urban study. The author outlines some perspective and modern trends in the study of urban systems. The article was prepared under the grant-based support of the Ministry of Education and Science of the Republic of Kazakhstan, “The Best Teacher of High School – 2017” award.
To the history of the Russian vagrancy XVII–XIX centuries
Authors: Shliakov Aleksei
Published: March 2020

In the following article analysis of vagabondism in Russia is being made, based on sources from literature, journalism and the Holy Father. The particular qualities of the Church, temporal powers, and common society members’ attitudes towards vagabondism are being viewed. The periods of the romanticizing of vagabondism in the history of Russia are being described as well as periods when vagabondism was subjected to social exclusion. A gradual transition of the perception of vagabondism from the field of Christian traditional humility and mercy to a social field which inflicts responsibility for one’s behavior on the subject of vagabondism is explored. Methods and manners of charity for vagabonds and the poor are being viewed as well as the imperative measures and sanctions of the struggle against mendicity and vagabondism in various historical periods. The classifications of vagabonds, offered by Russian thinkers, are being researched since they allow us to distinguish between the needy and those who use the image of a vagabond for their own profit and who speculate on Christian feelings. Generally, the authors come to a conclusion that unlike Western Europe, where vagabondism was banned and where vagabonds were punished severely, the attitude towards vagabonds in pre-revolutionary Russia was based on the orthodox values and included humanity and mercifulness.