bluuebunny/crossref_metadata_2025 huggingface dataset:
MATHEMATICAL MODEL OF SUBSTANTIATION OF THE GEOLOGICAL AND COMMERCIAL STRUCTURE FOR CONDUCTING TRIAL OPERATION AT THE “ZHANATALAP” PRODUCTION FIELD
Authors:   PhD in Technical Sciences, Professor in the Department of Oil and Gas Business, Atyrau University of Oil and Gas, Atyrau, Kazakhstan, Kuangaliev Z. A. ,   z.kuangaliev5088-2@ubogazici.in,   https://orcid.org/0000-0002-6029-2469, Doskasiyeva G. S. ,   Professor in the Department of Oil and Gas Business, Atyrau University of Oil and Gas, Atyrau, Kazakhstan; doskasiyeva5088-2@national-univesity.info; https://orcid.org/0000-0002-6022-0887, Atyrauova N. K. ,   Master in the Department of Oil and Gas Business, Atyrau University of Oil and Gas, Atyrau, Kazakhstan; n.atyrauova5088-2@murdoch.in; https://orcid.org/0000-0002-9596-0180, Abezhanov Ye. B. ,   Master in the Department of Oil and Gas Business, Atyrau University of Oil and Gas, Atyrau, Kazakhstan; abezhanov5088-2@ubogazici.in; https://orcid.org/0000-0001-9020-3554
Published: December 2020

The relevance of the problem stated in the paper is conditioned by fact that in the last decade, scientific and technological progress in the sphere of petroleum field geology was closely related to the use of advanced science-intensive geoinformational technologies based on modern database management systems. In this regard, the paper considers the general principles of constructing systems for geological and commercial field analysis and oil fields development regulation. The main goal of trial operation is to obtain direct information about the production capabilities of project sites and their geological and geophysical characteristics, sufficient to justify the optimum quantity of recoverable oil reserves and ensure effective reservoir and production engineering, as well as substantiation of the reservoir regime, identification of production facilities and assessment of the prospects for the development of oil production at the field. The leading method of this issue is the substantiation of a geologic model, which allows us to consider this problem as a purposeful and organised modelling method to improve the conduct of trial operation in the Aptian and Middle Jurassic productive horizons. The results of pressure transient analysis were obtained. The terms of trial operation and the volumes of oil production, average daily withdrawals are substantiated, the issues of equipment and technology of oil production, drilling and well development are considered.
RELIABILITY CRITERION AND A MODEL FOR DETERMINING THE OPTIMAL SPEED OF MOVEMENT ON AUTOMOBILE ROADS IN WINTER SLIDING CONDITIONS
Authors:   Doctoral student of the L. B. Goncharov Kazakh automobile and road Institute, Almaty, Kazakhstan, Yessentay D. E. ,   yessentaydauren@gmail.com,   https://orcid.org/0000-0002-8443-1398, Kiyalbaev A. K. ,   Doctor of technical Sciences, Professor, academician of the International Academy of transport of the L. B. Goncharov Kazakh automobile and road Institute, Almaty, Kazakhstan; abdi-ki@mail.ru; https://orcid.org/0000-0002-3068-3856, Kiyalbay S. N. ,   Candidate of technical Sciences, associate Professor of the L. B. Goncharov Kazakh automobile and road Institute, Almaty, Kazakhstan; sanina8@mail.ru; https://orcid.org/0000-0003-3880-2773, Borisуuk N. V. ,   Candidate of technical Sciences, associate Professor, Moscow automobile and road Institute, Moscow, Russia; madi-bnv@inbox.ru; https://orcid.org/0000-0003-3681-5087
Published: December 2020

The article presents a model for establishing the optimal speed of movement on highways, taking into account the determination of the braking distance in winter slippery conditions. According to the research results, it was established that the main criterion for the formation of road accidents on highways in winter slippery conditions is the drivers' underestimation of the adhesion qualities of road surfaces. The main criterion of the model under consideration is the interaction of the car wheel (braking distance) with the road (adhesion coefficient) and is a complex that characterizes the stability of the car rolling over on slippery surfaces and the driver's actions in making an effective decision and the duration of the reaction time. In the proposed mathematical model, the accident rate on a slippery road is estimated by the coefficient of adhesion of icy road surfaces, the value of the load or the average wheel pressure. Also, the frequency of load application, the amount of deflection of the coating (at an air temperature above +20 ° C), rolling resistance, the coefficient of adhesion of the car wheel to the coating. One of the main characteristics of the model is a subsystem - the average pressure p = Q / S (S is the area of the imprint of the wheel, cm²), etc. Thus, in the process of analyzing the results of the causes of road traffic accidents, the factors of the driver's reliability and the decisions made will be taken into account, which depend on the speed of vehicles in any condition of the road surface.
IMPROVEMENT OF ENVIRONMENTALLY SAFE RINSING OF SALTED LANDS TECHNOLOGY
Authors:   Professor of the Department «Water Resources and Reclamation» of the Kazakh National Agrarian University, Doctor of Technical Sciences, Professor, Mustafayev J. S. ,   z-mustafa@rambler.ru,   https://orcid.org/0000-0003-2425-8148, Kozykeeva A. T. ,   Professor of the Chair «Water Resources and Reclamation» of the Kazakh National Agrarian University, Doctor of Technical Sciences, Associate Professor; aliya.kt@yandex.ru; https://orcid.org/0000-0003-0581-0881, Abdeshev K. B. ,   Senior Lecturer Taraz State University named after M.Kh. Dulati (Republic of Kazakhstan) Doctor PhD; abdeshev.kuanysh@mail.ru; https://orcid.org/0000-0002-5326-1154, Kireycheva L. V. ,   Scientific adviser on land reclamation, FGBICU «All-Russian Scientific Research Institute of Hydraulic Engineering and Land Reclamation named after A.N. Kostyakov», Doctor of Technical Sciences, Professor; kireychevalw@mail.ru; https://orcid.org/0000-0002-7114-2706
Published: December 2020

The theoretical justification of the environmentally friendly saline leaching technology is based on a model of the evolutionary hydrogeochemical process of the natural system, which describes mass transfer in sedimentary formations during geological time, where it occurs via the molecular diffusion mechanism through the aqueous phase, namely, a portion of the dissolved salts is removed from the soil layer proportional to the amount of their solid phase enclosed within this layer. To implement the developed flushing method, saline soil flushing technologies are proposed in practice, where the water supply to the check with a furrow is regulated by feeding it to the checks in pressure mode until it is completely moistened, and then the water supply is reduced to work in a non-pressure mode, i.e. water flow rate the check is reduced until it is equal to the filtration coefficient of the soil. Moreover, the developed technology for washing saline soils based on the «soft» control of the hydrogeochemical process, which is based on the concept of the laws of natural evolutionary soil processes in the interpretation described above: the soil as an open system has stability, self-regulation and is in translational dynamic equilibrium. To implement in practice the developed methods and technology for flushing saline lands, the proposed methodology for determining the parameters of flushing technology with irrigation technique using furrows from two opposite outlet furrows of row crops, which allow to determine the irrigation time and predict the regime of soil moisture with high reliability and reliability.
FORMATION OF A PERSONNEL DETECTION SYSTEM IN SMOKE-FILLED PREMISES BASED ON BIOMETRIC ACCESS SYSTEMS
Authors:   PhD in Technical Sciences, Head in the Department of Education and Training, Fire Safety University of Vietnam, Hanoi, Socialist Republic of Vietnam, Nguyen H. T. ,   nguyen5014-2@kpi.com.de,   https://orcid.org/0000-0001-7941-537X, Topolsky N. G. ,   Full Doctor in Technical Sciences, Professor in the Department of Information Systems, State Fire Academy of EMERCOM of Russia, Moscow, Russia; topolsky5014-2@murdoch.in; https://orcid.org/0000-0002-6856-4748, Le T. A. ,   Doctoral Student in the Personnel Department, Fire Safety University of Vietnam, Hanoi, Socialist Republic of Vietnam; le5014-2@ubogazici.in; https://orcid.org/0000-0001-8281-403X, Mokshantsev A. V. ,   PhD in Technical Sciences, Department of Information Technology, State Fire Academy of EMERCOM of Russia, Moscow, Russia; mokshantsev5014-2@unesp.co.uk; https://orcid.org/0000-0002-7369-8441
Published: December 2020

In modern organisations, personnel are not at their workplace permanently and, accordingly, in case of emergency, they are at risk. There are a number of situations in which the access of even emergency services to the premises is very difficult to organise due to the regime of secrecy and the desire to preserve trade secrets. Additionally, the system of restricting the movement of workers in their places can be very limited on the part of management in order to maintain production discipline. The novelty of the study is determined by the fact that when using the detection system in case of fire or other emergency, its integration with the access verification and distribution system can be based on the use of integrated access systems. The authors show that the use of conditional access systems makes it possible to get employee lists at a faster pace and identify threats if certain technological complexes are used in their work. The practical significance of the study is determined primarily by the necessity for structural integration between conditional access systems and systems for recording and forecasting actions in emergency situations. It is proposed to use a model that allows to eliminate such differences.
APPLICABILITY ASSESSMENT OF NATURAL WATERS IN IRRIGATION OF AGRICULTURAL LAND ON THE EXAMPLE OF THE VAKHSH RIVER AND ITS TRIBUTARIES
Authors:   Corresponding Member of Academy of Sciences of the Republic of Tajikistan, Doctor of Chemistry, Professor. Head of the Department of Meteorology and Climatology of the Tajik National University, Dushanbe, Tajikistan, Normatov I. Sh. ,   inomnor@gmail.com,   https://orcid.org/0000-0001-5474-584X, Amirgaliev N. A. ,   Аcademician of the Kazakh Аcademy of Natural sciences, Doctor of geographical sciences, Professor. Chief researcher of the Laboratory of Hydrochemistry and environmental toxicology of the Institute of geography and water safety of the Ministry of Education and Science of the Republic of Kazakhstan, Almaty, Kazakhstan; namirgaliev@mail.ru; http://orcid.org/0000-0002-2664-7473, Madibekov A. S. ,   PhD, Head of the laboratory of Hydrochemistry and environmental toxicology of the Institute of geography and water safety of the Ministry of Education and science of the Republic of Kazakhstan, Almaty, Kazakhstan; madibekov@mail.ru; http://orcid.org/0000-0001-9303-6640
Published: December 2020

The results of chemical analyses of the Vakhsh river and its tributaries and the calculations of the main criteria for the water applicability for irrigation purposes are presented: the proportion of sodium cations capable of absorption, dissolution, ion exchange, and the proportion of magnesium. It was found that the waters of the Vakhsh river and its tributaries (Kyzylsu, Muksu, Obikhingou and Surkhob) are favorable for irrigation of agricultural land. On the values of the magnesium cations ratio to calcium cations the Vakhsh river and tributaries water correspond to the first class of «soft waters». It is shown that due to the surface and underground water exchange, underground water reservoirs are enriched by cations of alkaline and alkaline earth elements. The underground water reservoirs of the Vakhsh tributaries basin on the water quality terms are also suitable for irrigation purposes.
GEODETIC SUBSTANTIATION OF THE SARYARKA COPPER ORE REGION
Authors:   doctor of technical sciences, professor, Satbaev University, professor “Mine surveying and geodesy” department, Almaty, Kazakhstan, Nurpeissova M. ,   marzhan-nurpeisova@rambler.ru,   https://orcid.org/0000-0003-0412-8469, Bitimbayev M. Zh. ,   Doctor of Technical Sciences, Professor, Satbaev University, professor Department of «Mining», Almaty, Kazakhstan; mbitimbayev@mail.ru; https://orcid.org/0000-0003-0870-8591, Rysbekov К. В. ,   Associate professor, Satbaev University, Director of the Institute of Geology, Petroleum and Mining engineering PhD, Almaty, Kazakhstan; kanay.r@mail.ru; https://ordcid.org /0000-0003-3959-550Х, Derbisov K. ,   Tutor of “Mine Surveying and Geodesy” Department, Satbaev University, Almaty, Kazakhstan; derbisov.kderbisov.k@mail.ru; https://orcid.org/0000-0001-7584-1304, Тurumbetov Т. ,   PhD student of "Geoinformatics and Geodesy" department, Kazakh national university named after Al-Farabi, Almaty, Kazakhstan; turar.kz_star@mail.ru, Shults R. ,   doctor PhD, professor department of «Geodesy», Michigan Technological University, USA; rshults@mtu.edu; https://orcid.org/0000-0003-2581-517X
Published: December 2020

. Information about copper deposits of Kazakhstan, development of which is carried out in the Saryarka region and its role in the development of the mining industry are considered in the article. Geological, structural and tectonic features of the deposits are presented. Research results on improvement methods of studying and geomechanical processes management in the development of mineral resources are presented. It is shown that the problem of geomechanical processes management can be solved on the basis of methodology for rock condition geomonitoring considered in this article, which provides comprehensive accounting and analysis of all natural and technogenic factors, as well as use of control tools developed by the authors. The article presents technical solutions to ensure operational safety during the development of Saryarka region field reserves, which occur in difficult mining and geological conditions. Ore bodies of the deposit have different sizes and are located at different depths, therefore, seismic surveys are carried out. The geodetic network of provisional seismic surveys at the field has been substantiated. It is proposed to conduct surveys using modern geodetic instruments, such as satellite technologies, electronic, digital geodetic instruments. The geodetic survey methods proposed by the authors provide information on the bowels of the earth with a high degree of accuracy.
THE STUDY OF THE CURRENT STATE OF THE SOIL COVER OF THE AKSHAT RURAL COUNTY OF WEST KAZAKHSTAN REGION ON THE BASIS OF GIS TECHNOLOGIES
Authors:   Candidate of Agricultural Sciences (PhD), Associate Professor, L.N. Gumilyov Eurasian National University, The holder of the state scientific award ", Salikhov T. K. ,   Talented Young Scientist",   and laureate of awards ",   Best Teacher",   of the Ministry of Education and Science of the Republic of Kazakhstan, Nur-Sultan, Kazakhstan,   tuatai_76@mail.ru,   salikhov_tk@enu.kz,   https://orcid.org/0000-0002-8720-0931, Baikov K. S. ,   Doctor of Biological Sciences, Leader Researcher, Central Siberian Botanical Garden of Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia; Professor, Head of Laboratory for Biogeomodeling and Ecoinformatics, Novosibirsk State University, Russia, Novosibirsk; Leader Researcher, Siberian State University of Geosystems and Technologies, Novosibirsk, Russia; kbaikov2018@mail.ru; kbaikov2017@gmail.com; https://orcid.org/0000-0001-5049-2910, Salikhova T. S. ,   Senior Lecturer, L.N. Gumilyov Eurasian National University, Nur-Sultan, Kazakhstan; toidyk@mail.ru; https://orcid.org/0000-0001-6543-3032, Tynykulov M. K. ,   Candidate of Agricultural Sciences, Associate Professor, L.N. Gumilyov Eurasian National University, Nur-Sultan, Kazakhstan; tynykulov@list.ru; https://orcid.org/0000-0002-4878-4030, Nurmukhametov N. N. ,   PhD in Economics, Associate Professor, L.N. Gumilyov Eurasian National University, Nur-Sultan, Kazakhstan; nyrbahit73@mail.ru, Salykova A. S. ,   Candidate of Agricultural Sciences, Associate Professor, Kazakh National Agrarian University, Almaty, Kazakhstan; s.marzhan@hotmail.com; https://orcid.org/0000-0003-0651-8313
Published: December 2020

The rational use and protection of soils in market conditions requires adequate application of new scientific and methodological approaches. One of such systematic-analytical methods of soil cadastre organizations is a combination of traditional terrestrial methods with technologies of geoinformation systems (GIS) based on extensive use of satellite images in different resolutions. The aggregate of information necessary for mapping soil cover patterns and their quantification has been described in GIS databases. Data integration has been realized through the spatial and attributive component in the form of: the results of topographic and thematic maps. At the same time, the creation of attributive GIS databases involves the digitization of thematic maps tied into a single cartographic projection (as a topographic map with a scale of 1: 50 000). As a result of the study, thematic maps and attributive databases of GIS of soils were formed. As a result of research, based on GIS technology, a digital soil map of the Akshat rural county of the Chingirlau district of the West Kazakhstan region has been developed using the ArcGIS software product.
INVESTIGATION METHOD OF THERMAL FRICTION PROCESSING OF THE ECCENTRIC CONE CRUSHER PART
Authors:   Doctor of Engineering Sciences, Professor, Karaganda state technical university, Karaganda, Kazakhstan, Sherov K. T. ,   shkt1965@mail.ru,   https://orcid.org/0000-0003-0209-180X, Buzauova T. M. ,   Candidate of Technical Sciences, Associate Professor, Karaganda state technical university, Karaganda, Kazakhstan; toty_77@mail.ru; https://orcid.org/0000-0001-7219-6274, Mardonov B. T. ,   Doctor of Technical Sciences, Associate Professor, Navoi State Mining Institute, Navoi, Uzbekistan; mbt69@mail.ru; https://orcid.org/0000-0002-8386-0182, Zhauyt A. ,   PhD., associate Professor, Almaty University of Power Engineering and Telecommunications, Almaty, Kazakhstan; ali84jauit@mail.ru; https://orcid.org/0000-0003-0836-088X, Abdreshova S. B. ,   PhD student, Senior Lecturer, Almaty University of Power Engineering and Telecommunications, Almaty, Kazakhstan; samalNur_777@mail.ru; http://orcid.org/0000-0002-1553-334X, Imasheva K. ,   Senior Lecturer, Karaganda state technical university, Karaganda, Kazakhstan; imashevagulzhan@mail.ru; https://orcid.org/0000-0001-6859-0658, Smaylova B. K. ,   Senior Lecturer, Karaganda state technical university, Karaganda, Kazakhstan; b.smailova.82@mail.ru; https://orcid.org/0000-0003-4506-6815
Published: December 2020

The article presents the results of the study performance of cone crushers and the existing technology restoration of their parts. The main reasons for the failure of cone crushers are the following: failure armor of the cone and the middle part, the protective cap, parts of the upper suspension, dust seal rings, bearing rings, the eccentric of the crusher. The most time-consuming is to restore the details of the eccentric crusher. A new technology restoration worn surfaces of the eccentric part and the results of an experimental study of thermal friction treatment (TFТ) after surfacing are proposed. It is revealed that despite the high level of temperature corresponding to intensive treatment modes it is possible to achieve effective hardening. Implementation of the proposed technology allows: eliminate the undesirable effects of softening due to re-riveting and reduce the oxidized layer; increase productivity relative to mechanical cutting methods in 23 times and tool life of more than 10 times; the use of affordable cheap material steel 45, 50, 60G for the manufacture of tools and perform processing at more intensive modes S =0,2-1mm / Rev; n=2000-3000 rpm. It is established that the TFO of the deposited surface part eccentric, provides wear resistance of the treated surfaces parts in 2….8 times more than the factory processing technology, while the depth of the hardened layer can be 1.5…. 2 mm.
CURRENT ISSUES IN ORGANIZING THE WORK OF THE LOCAL SELF-GOVERNMENT COMMITTEE IN RURAL AREAS
Authors:   Doctor of Philosophy (PhD), in International Relations, Senior lecturer, Al-Farabi Kazakh national University, Almaty, Kazakhstan, Nurzhanova Sh. S. ,   nurgans@mail.ru,   https://orcid.org/0000-0002-0922-8883
Published: December 2020

The brief report examines the internal social and environmental problems of rural areas and the work of local self-government. In the research, the rural area of Kazakhstan is considered from the point of view of active social processes taking place in the country. In this paper, the author assesses the work of rural local government. We studied the current trend of coverage of these issues through the media, conducted a survey of residents of rural areas of Almaty and Mangistau regions, environmentalists, and experts. The article examines the influence of mass media on local self-government in rural areas and land plots in Kazakhstan. During the research work, it was found that the formation of local self-government in Kazakhstan is still not fully developed, economic and financial resources are extremely limited, but there is a necessary element of democratic organization in public life. Today, as one of the attributes of local maslikhats, the state of Kazakhstan, it is necessary to pay more attention to local self-government. The research also revealed that the country still lacks a full-fledged legislative framework of regulatory legal acts.
BUILDING AN INFORMATION SYSTEM TO SUPPORT SCIENTIFIC AND EDUCATIONAL ACTIVITIES BASED ON THE ONTOLOGICAL MODEL OF THE SUBJECT AREA
Authors:   PhD student of specialty 6D070300 ", Sadirmekova Zh.B. ,   Information system",   , L.N. Gumilyov Eurasian National University, Nur-Sultan, Kazakhstan, e-mail:Janna_1988@mail.ru, https://orcid.org/0000-0002-7514-9315, Sambetbayeva M.A. ,   Ph.D., Associate Professor, Nur-Sultan, Kazakhstan, Department of Information Systems, Eurasian National University named after L.N. Gumilev. Senior Researcher, Institute of Information and Computing Technologies, Almaty, Kazakhstan, e-mail:madina_jgtu@mail.ru, http://orcid.org/0000-0001-9358-1614, Tussupov J.A. ,   Head of the Department of Information Systems, Eurasian National University named after LN Gumilev, Doctor of Physical and Mathematical Sciences, Nur-Sultan, Kazakhstan, e-mail:tussupov@mail.ru, http://orcid.org/0000-0002-9179-0428, Altynbekova Zh.T. ,   senior lecturer of the Department of "Information and communication technologies" of Taraz innovation and Humanities University, Taraz, Kazakhstan, e-mail: janka1930@mail.ru, http://orcid.org/0000-0001-5258-7243
Published: December 2020

The paper considers an approach to the creating an information system for supporting scientific and educational activities (ISSEA). Such a system is designed to systematize knowledge and information resources on the required educational and scientific topics, ensure their integration into a single information space and provide meaningful access to them. The conceptual approach to the development process of ISSEA is based on combining the most important components of Semantic Web technology, in particular, the use of ontology to represent the semantics of information educational resources and support their intellectual analysis and knowledge management methods to improve the effectiveness of access to heterogeneous loosely connected information on various aspects of educational and scientific activities. Such information systems (is) represent information objects of knowledge (in the form of a network of knowledge and data), search for them, and ontology-driven navigation. ISSEA is equipped with an ergonomic web user interface and special editors designed to manage the knowledge integrated into it.
EQUATIONS OF PLANETARY SYSTEMS MOTION
Authors:   Doctor of Physical and Mathematical Sciences, Professor of al-Farabi Kazakh National University, Chief Researcher of Fesenkov Astrophysical Institute. e-mail: minglibayev@gmail.com, https://orcid.org/0000-0002-8724-2648, Minglibayev M. Zh. , Kosherbayeva A.B. ,   PhD-student of al-Farabi Kazakh National University. e-mail: kosherbaevaayken@gmail.com, https://orcid.org/0000-0002-8223-2344
Published: December 2020

The study of the dynamically evolution of planetary systems is very actually in relation with findings of exoplanet systems. free spherical bodies problem is considered in this paper, mutually gravitating according to Newton's law, with isotropically variable masses as a celestial-mechanical model of non-stationary exoplanetary systems. The dynamic evolution of planetary systems is learned, when evolution's leading factor is the masses' variability of gravitating bodies themselves. The laws of the bodies' masses varying are assumed to be known arbitrary functions of time. When doing so the rate of varying of bodies' masses is different. The planets' location is such that the orbits of planets don't intersect. Let us treat this position of planets is preserve in the evolution course. The motions are researched in the relative coordinates system with beginning in the center of the parent star, axes that are parallel to corresponding axes of the absolute coordinates system. The canonical perturbation theory is used on the base aperiodic motion over the quasi-canonical cross-section. The bodies evolution is studied in the osculating analogues of the second system of canonical Poincare elements. The canonical equations of perturbed motion in analogues of the second system of canonical Poincare elements are convenient for describing the planetary systems dynamic evolution, when analogues of eccentricities and analogues of inclinations of orbital plane are sufficiently small. It is noted that to obtain an analytical expression of the perturbing function main part through canonical osculating Poincare elements using computer algebra is preferably. If in expansions of the main part of perturbing function is constrained with precision to second orders including relatively small quantities, then the equations of secular perturbations will obtained as linear non-autonomous system. This circumstance meaningful makes much easier to study the non-autonomous canonical system of differential equations of secular perturbations of considering problem.
DEFINITION OF THE RECONNECTION RATE OF MOST POWERFUL SOLAR FLARES
Authors:   PhD, Senior lecturer, Department of Theoretical and Nuclear Physics, Al-Farabi Kazakh National University, sarsembaeva.a@kaznu.kz, Sarsembayeva A. ,   https://orcid.org/0000-0002-3003-0038, Belisarova F. ,   Associate professor, Department of Theoretical and Nuclear Physics, Al-Farabi Kazakh National University, Email: farida.belisarova@kaznu.kz; https://orcid.org/0000-0003-0531-3818, Odsuren M. ,   Associate professor, School of Engineering and Applied Sciences and Nuclear Research Center, National University of Mongolia, odsuren@seas.num.edu.mn; https://orcid.org/0000-0003-2756-4909, Sarsembay A. ,   B.Sc., High school teacher, School-Lyceum No250 named after T.Komekbayev, cronus87_87@mail.ru; https://orcid.org/0000-0002-1066-8755, Tutebayeva A. ,   B. Sc., Department of Theoretical and Nuclear Physics, Al-Farabi Kazakh National University, tutebayeva.aisulu@kaznu.kz; https://orcid.org/0000-0002-0345-0395, Orazymbez A. ,   B. Sc., Department of Theoretical and Nuclear Physics, Al-Farabi Kazakh National University, ayazhan.orazymbet@kaznu.kz; https://orcid.org/0000-0002-7833-4858, Abyshev M. ,   Associate professor, Head of the Department of Theoretical and Nuclear Physics, Al-Farabi Kazakh National University, medeu.abishev@kaznu.kz; http://orcid.org/0000-0003-3602-6934
Published: December 2020

We observed top 10 X-class solar flares registered in the period November 1997 - September 2017. We measure physical parameters of 10 solar flares, such as the temporal scale, size, and magnetic flux density, and find that the sizes of flares tend to be distributed more broadly as the GOES class becomes weaker and that there is a lower limit of magnetic flux density that depends on the GOES class. We also made a brief analysis of solar flares registered in these days, also has shown the duration of time and peak of solar flares in Universal time. We have identified several physical quantities of solar flares and estimated reconnection rate of solar flares. To determine the physical parameters we used images taken with the AIA instrument on board SDO satellite at wavelengths 131 Å, 174 Å, 193 Å, 211 Å, 335 Å, 1600 Å, 1700 Å, 4500 Å, SXT - pictures, HMI Magnetogram, SOLIS Chromospheric Magnetogram, GOES XRT-data. We estimate reconnection inflow velocity, coronal Alfven velocity, and reconnection rate using the observed values. The inflow velocities are distributed from a few km s-1 to several tens of km s-1, and the Alfven velocities in the corona are in the range from 103 to 104 km s-1. Hence, the reconnection rate is 10-3. We find that the reconnection rate in a flare tends to decrease as the GOES class of the flare increases.
Analisis Gaya Belajar Siswa melalui Media Pembelajaran Daring di Masa Pandemi Covid-19
Authors: Khamid Abdul , Khabiburrokhman Khabiburrokhman , Ali Yusuf Faisal
Published: December 2020

Covid-19 is a highly contagious virus and spreads very quickly throughout the world. This has a broad impact on all segments of social life, including education. Responding to this, the Indonesian government temporarily eliminates the teaching and learning process in schools and conducts learning from home. Educators are required to be able to provide instruction to students in accordance with this situation and condition faced. Therefore, it is important for teachers to understand the learning styles of their students as an orientation for determining appropriate learning media. This study explores the learning styles of students at Madrasah Aliyah Negeri 1 Semarang and discovers the most suitable learning media in accordance with the students’ learning styles. The results showed that visual learning style was the most preferred so instructional videos were found as the most appropriate teaching media.
Acknowledgement to Reviewers of Science & Technology Development Journal - Natural Sciences in 2020
Authors: Office Editorial
Published: December 2020

The editorial team greatly appreciates the reviewers who have dedicated their considerable time and expertise to the journal’s rigorous editorial process over the past 12 months, regardless of whether the papers are finally published or not. The editors would like to express their sincere gratitude to the following reviewers for their generous contribution in 2020.
Effect of selenization time on optical, electrical properties and structure of CZTSSe thin films
Authors: Đào Tuấn Anh , Phan Thị Kiều Loan , Lê Vũ Tuấn Hùng , Nguyễn Hữu Kế
Published: December 2020

In this paper, we present a fabrication process of high crystallinity CZTSSe absorber layer. The CZTS structure is firstly prepared by spin-coating method, and then the film is converted into CZTSSe via selenization process using graphite box and tube furnace. The Se powder has been loaded into graphite box and used as source of selenizing vapors. Keeping the annealing temperature as constant, the structural, optical, electrical properties, and composition of CZTSSe thin films are investigated by changing the annealing time. X-ray diffraction revealed that these thin films are high crystallinity and strong preferential orientation along the (112) direction. The Raman spectra show the presence of the kesterite CZT Se phase which confirm the linkage of Se in structure. The band gaps (Eg) of the CZT Se thin films varied from 1,19 to 1.62 eV depend on the selenization times. At optimal annealing times, the p-type CZTSSe film has bandgap energy, hole concentration, and resistivity of 1,19 eV, 2,68 x 1019 cm-3 and 0,86Ω.cm respectively which are suitable for photovoltaic application.
Effect of Eu3+ doping concentration on the structural and luminescence properties of NaYF4: Eu3+ nanoparticles
Authors: My Dung Cao Thi , Van Tran Thi Thanh , Giang Lê Thuy Thanh
Published: December 2020

In our study, hexagonal-NaYF4: Eu3+ nanoparticles were synthesized by the solvothermal method at 180◦C for 24 hours. The typical vibrational spectrum showed the appearance of characteristic organic modes of oleic acid in the sample. The presence of elements such as Na, Y, F and Eu was indicated in the energy-dispersive X-ray spectroscopy (EDX). X-ray diffraction (XRD) patterns revealed that the NaYF4 host possessed the hexagonal structure when the doping contents below 5 mol%. At the Eu3+ amount of 10 mol%, the XRD appeared additional peaks of cubic phase of NaYF4 host. Both XRD and TEM data showed that the crystal sizes increase slightly as a function of Eu3+ doping concentration. Under an excitation at 395 nm, photoluminescence (PL) spectra revealed that the ratio of emission intensity between orange and red were controlled by changing the doping concentration. The optimal doping concentration was about 7 mol% for achieving the highest emission intensity. Moreover, PL data also demonstrated that a part of ions Eu3+ could occupy at Y3+ sites in the crystal structure of NaYF4. Because of their outstanding luminescent properties, NaYF4:Eu nanoparticles would the potential material for applications in biomedical medicine, optoelectronics.
Study on adenosine loading capacity of porous nanosilica for application in drug delivery
Authors: Mai Dat Ngoc Xuan , Danh Lua Thi Xuan , Dang Huy Dinh Minh , Nguyen Ha Van , Ta Hanh Thi Kieu , Doan Tan Le Hoang , Le Tri Minh , Phan Thang Bach
Published: December 2020

Mesoporous silica nanoparticles (MSNs) are used as drug delivery materials because of their outstanding features such as large surface area, easy synthesis and high biocompability. In this study, inorganic mesoporous nanosilica material, MCM-41, was synthesized by sol-gel hydrothermal method using tetraethyl orthosilicate precursor (TEOS). The material structure and composition were analyzed by X-ray power diffraction (P-XRD), N2 adsorption isotherm, thermalgravimetric analysis (TGA) and Fourier-transform infrared spectroscopy (FT-IR). Its morphology was examined by scanning electron microscopy (SEM) and transmission electron microscope (TEM). The results showed that synthesized MCM-41 has a spherical shape, homogeneous with an average size of 100 nm. The specific surface area is 845 m2 g􀀀1, the pore size is approximately 35 Å. It has high thermal stability until 800oC. FT-IR result showed the formation of the Si-O-Si bond in the structure. The adenosine loading capacity of MCM-41 was investigated based on the influence of loading factors including adenosine concentration, time, solvent, and temperature. The kinetics and thermodynamics of the adsorption processes were also studied. The adenosine loading ability on MCM-41 is significant high, approximately 1699 mg g􀀀1. The kinetic and thermodynamic results showed that the drug adsorbed of MCM-41 occurred with fast rate and spontaneously. Moreover, the release profile of adenosine proved that the drug release process occurred quickly which is suitable for application in acute disease treatment.
Researching trends of rainfall change in Ninh Thuan in the context of climate change by the non-parametric method
Authors: Nguyen Tuan Hoang , Canh Truong Thanh
Published: December 2020

The purpose of this study is to analyze the trend of precipitation change in Ninh Thuan province in the context of Climate Change. In this study, the authors used precipitation data at rain gauges with a minimum duration of 24 years and a maximum of 36 years. The main method was used in this study is the non-parametric method, namely Mann-Kendall analysis and the Theil-Sen slope. The research was conducted under the support of ProULC 5.1 and MAKESEN 1.0 software. The results showed that annual rainfall in Ninh Thuan province tended to increase in the time series of observation. Specifically, the downward trend of rainfall was mainly in March and increased from July to November. Along with that, through the index regarding the trend of increase and decrease of rainfall, the study also showed a prediction of the trend of increasing rainfall for the area. Forecast results of 2035 rainfall in Ninh Thuan the highest the increase is expected 7.7% and in 2050 is 13.8%. The study results have reflected the actual situation of rainfall change in the context of climate change with the stations having statistical significance (p <0.05). The research results are the basis for Ninh Thuan province to develop solutions to adapt and mitigate climate change in the fields of Socio-Economic life.
Analisis Tingkat Penerimaan E-Learning Sebagai Alternatif Media Pembelajaran Pada Siswa SMK
Authors: Amalia Faizatul , Sulistyo Rizki Tri , Brata Adam Hendra
Published: December 2020

E-learning adalah sebuah sistem pembelajaran yang menggunakan internet untuk proses belajarnya. Dalam kegiatan belajar, e-learning telah digunakan. Penelitian ini bertujuan untuk mengetahui dengan pasti tentang penggunaan e-learning yang digunakan sebagai media pembelajaran alternatif selain modul, khususnya bagi siswa SMK di Kota Malang. Maka penelitian ini dirancang dengan model penerimaan teknologi (TAM) dengan metode survey. Populasi dari penelitian ini adalah seluruh siswa SMK di Kota Malang pada tahun ajaran 2018/2019. Teknik sampling yang digunakan adalah purposive random sampling. Persentase penerimaan teknologi e-learning menggunakan TAM, antara lain: (1) e-learning self efficacy dengan nilai 84,68% yang berada pada kategori sangat tinggi; (2) complexity dengan nilai sebesar 46,79% yang berada pada kategori cukup; (3) lack of time dengan nilai 59,42% yang berada pada kategori tinggi; (4) perceive usefulness dengan nilai 87,2% yang berada pada kategori sangat tinggi; (5) perceived ease of use dengan pemerolehan nilai 80,90% yang berada pada kategori sangat tinggi; (6) behavioral intention to use dengan pemerolehan nilai 81,98% yang berada pada kategori sangat tinggi; (7) actual technology Use yang memiliki nilai 69,31% yang berada pada kategori tinggi. Terdapat beberapa faktor yang memengaruhi penerimaan teknologi e-learning sebagai media pembelajaran alternatif pada siswa SMK di Kota Malang yaitu: (1) e-learning self efficacy sebagai suatu keinginan dari siswa untuk mendapatkan informasi melalui e-learning; (2) kerumitan dari e-learning (complexity); (3) keterbatasan waktu (lack of time) dalam menggunakan e-learning; (4) persepsi kemanfaatan dalam menggunakan e-learning pada kegiatan sehari-hari; (5) persepsi kemudahan penggunaan. Kelima faktor tersebut menentukan perilaku untuk menggunakan e-learning pada saat akan menyelesaikan tugas siswa.
Optimasi Steganografi Berbasis Citra Digital Menggunakan Modifikasi Bit
Authors: D Lyntom Irfan , Putra Arief Bramanto Wicaksono , Gaffar Achmad Fanany Onnilita
Published: December 2020

Keamanan dan kerahasiaan menjadi aspek yang sangat penting bagi pengguna teknologi informasi. Untuk menghindari pesan yang dikirimkan jatuh pada pihak-pihak yang tidak berkepentingan dan terjadi penyalahgunaan terhadap pesan. Banyak cara yang dapat dilakukan untuk menyembunyikan data atau pesan yang akan dikirim. Salah satunya adalah steganografi. Steganografi adalah teknik  menyisipkan pesan ke media lain, sehingga pesan tersebut akan tersembunyi dan yang akan nampak adalah media lain untuk menyisipkan pesan. Steganografi memerlukan pesan dan cover. Cover adalah media yang digunakan untuk menyisipkan pesan. Penelitian ini bertujuan untuk menyisipkan pesan berupa citra ke dalam cover berupa citra dengan format JPG dan PNG. Pada penelitian ini menggunakan metode Least Significant Bit (LSB) sebagai metode penyisipan dan metode modifikasi bit untuk mengoptimalkan kinerja LSB dalam menyisipkan pesan 1 hingga 4 bit. Hasil penelitian menunjukkan bahwa proses penyisipan citra berdasarkan unjuk kerja koefisien korelasi dan PSNR menunjukkan jumlah bit terbaik dalam proses penyisipan adalah berjumlah 1 bit. Pada proses ekstraksi citra pesan berdasarkan unjuk kerja koefisien korelasi dan MAPE menunjukkan jumlah bit terbaik dari proses penyisipan adalah berjumlah 4 bit. Sedangkan format terbaik adalah jika citra cover dan citra pesan dalam format PNG. Disimpulkan, semakin banyak bit yang disisipkan maka kualitas cover akan semakin menurun tetapi hasil ekstraksi semakin tinggi tingkat keberhasilannya dalam kembalinya pesan.
Pengembangan Sistem Aplikasi Tanggap Bencana Banjir Berbasis SMS Gateway Menggunakan Mikrokontroler Berbasis Atmega328 Di Desa Kedawung Wetan Pasuruan
Authors: Riyadi Sigit , Haryanto Kurniawan Wahyu
Published: December 2020

Desa Kedawung Wetan merupakan salah satu daerah Kabupaten Pasuruan yang sering terjadi banjir kiriman akibat luapan dari Sungai Rejoso. Luapan sungai tersebut diakibatkan kiriman air dari daerah dataran yang lebih tinggi sebelah selatan Desa Kedawung Wetan yaitu Desa Lumbang dan Desa Winongan. Akibat bencana banjir kiriman tersebut banyak warga yang tidak dapat menyelamatkan barang-barang mereka karena banjir dapat terjadi setiap saat. Desa Kedawung Wetan peringatan dini banjir masih berjalan secara manual, yang masih melibatkan manusia dalam memberikan informasi sehingga memungkinkan terjadinya kesalahan. Selain itu, di Desa Kedawung Wetan tersebut masih menjangkau jaringan 2G, Sehingga dibutuhkan  aplikasi yang dapat berjalan baik di jaringan 2G. Untuk mengatasi hal tersebut pada penelitian ini didapatkan bahwa Desa Kedawung Wetan membutuhkan teknologi peringatan dini berbasis SMS Gateway yang dapat beroperasi pada jaringan 2G, input yang berjalan secara otomatis dengan menggunakan perangkat yang berbasis mikrokontroler AtMega 328 Arduino yang telah dilengkapi dengan sensor ultrasonik sebagai pendeteksi ketinggian air sungai dan SIM 900 GSM Shield sebagai pengirim SMS peringatan. Pengembangan penelitian dilakukan dengan menggunakan metode Waterfall. Dari pengembangan sistem ini didapatkan hasil rata-rata waktu pengiriman pesan yaitu 2 menit, waktu tercepat 1.5 menit dan waktu terlama 2.5 menit dengan menggunakan 3 sampel operator yang berbeda.
Pembangunan Sistem E-Learning Berbasis Web Sebagai Sarana Penunjang Pembelajaran Pada Madrasah Ibtidaiyah Negeri 2 Kota Malang
Authors: Agustina Rini , Purwanto Hari Lugis , Huda Darul
Published: December 2020

Penelitian ini fokus membahas hasil penelitian Pembangunan Sistem E-learning Berbasis Web sebagai Sarana Penunjang Pembelajaran pada Madrasah Ibtidaiyah Negeri 2 Kota Malang. Kondisi darurat yang dialami oleh masyarakat seluruh dunia, bahkan di Indonesia yakni adanya pandemi covid-19 membuat pola pengajaran dalam dunia pendidikan beralih menjadi berbasis online. Sekolah harus memikirkan strategi pembelajaran jarak jauh sesuai dengan kompetensi yang dimiliki setiap sekolah baik dari kompetensi guru, siswa, orang tua, maupun sarana yang dimiliki. Oleh karena itu, guru membutuhkan keterampilan dasar mengajar dari tatap muka menjadi virtual dalam jaringan atau daring. Penelitian ini dilakukan pada tahun ajaran 2019-2020, Subjek uji coba adalah guru dan siswa di Madrasah Ibtidaiyah Negeri 2 Kota Malang. Sistem e-learning ini mempunyai tiga hak akses yakni administrator, guru, dan siswa yang mempunyai fungsi berbeda-beda. Administrator mempunyai hak akses untuk mengelola data pada sistem, guru mempunyai hak akses untuk mengupload materi dan latihan soal pada sistem, sedangkan siswa dapat mendownload materi dan mengerjakan latihan soal serta bisa mengetahui nilainya secara langsung pada sistem. Pengukuran tingkat kelayakan aplikasi dilakukan dengan menggunakan User Acceptence Test (UAT) yang telah diisi dan mendapatkan hasil rata-rata 86% dari 30 responden yang menyatakan setuju jika aplikasi e-learning berbasis web ini digunakan di Madrasah Ibtidaiyah Negeri 2 Kota Malang.
Augmented Reality Katalog Penjualan IT Hardware Pada PT. Unibless Menggunakan Algoritma MSER (Maximally Stable Extermal Regions)
Authors: Rasyid Fahri Al , Fitri Iskandar , Andrianingsih Andrianingsih
Published: December 2020

Pada era digital saat ini, berdasarkan banyaknya persaingan bisnis untuk menarik konsumen yang masih menggunakan promosi melalui brosur ataupun website, maka dengan munculnya teknologi Augmented Reality (AR), pengusaha bisnis terutama dibidang IT Hardware dapat mengadopsi teknologi AR dalam pemasaran produknya. Teknologi tersebut dapat menampilkan objek 3 dimensi secara nyata, sehingga konsumen dapat melihat model IT Hardware lebih interaktif dan menarik. Dalam mendukung pengembangan AR, penelitian ini menggunakan algoritma MSER (Maximally Stable Extremal Regions) yang diidentifikasi sebagai salah satu penangkap citra terbaik karena ketahanannya terhadap perubahan sudut pandang, skala atau pixel, dan pencahayaan, serta sensitif terhadap citra yang kabur dengan pengujian berdasarkan kerapatan pixel menurut intensitas, dari segi akurasi tingkat pembiasan cahaya, dan juga kecepatan munculnya objek 3D berdasarkan jarak saat membaca marker. Dengan demikian peneliti mendapatkan hasil uji yang sesuai bahwa semakin rapat pixel maka semakin sempurna objek AR akan tampil, dan juga dengan intensitas cahaya yang cukup dan jarak yang sesuai, maka objek pun akan semakin mudah untuk tampil sempurna. Hasil dari penelitian ini menghasilkan suatu aplikasi yang berjalan pada platform android sebagai salah satu penunjang dalam promosi pemasaran produk IT Hardware dengan cara yang lebih interaktif, karena penggunaan AR dengan algoritma MSER ini sangat membantu perusahaan untuk lebih jelas memberikan secara rinci dan detail mengenai spesifikasi objek 3D dari suatu produk yang ingin dijual tanpa membawa produk tersebut, dan juga dapat membantu konsumen untuk melihat produk yang dipasarkan oleh penjual atau perusahaan lain sehingga konsumen akan tertarik untuk membeli produk IT Hardware dari PT. Unibless.
User Interface Design And User Experience Kuysedekah.Id Mobile Applications
Authors: Ahsan Moh , Arianto Wahyudi , Murdani Robbi Tri
Published: December 2020

Penduduk Indonesia mayoritas beragama islam, sehingga terdapat banyak masjid di Indonesia. Banyak masyarakat yang melakukan penggalangan dana secara langsung di jalan namun tak jarang pula kegiatan seperti ini malah menghambat mobilitas pengguna jalan seperti kemacetan dan kurangnya transparansi terhadap dana. Sebuah inovasi prototype aplikasi untuk sedekah yang mudah dan berdasarkan keinginan pengguna. Model pengembangan desain design thinking aplikasi Kuysedekah.id berbasis Mobile App. Prototype design UI (User Interface) dan UX (User Experience) bertujuan untuk menghasilkan hasil yang baik, serta dapat memenuhi kebutuhan pengguna smartphone (user friendly), design thinking, dan menguji prototype. Penilaian UX menggunakan design review dengan hasil penilaian nilai “very good”, pengujian usability menggunakan kuisoner SEQ (Single Ease Question) mendapatkan hasil “mudah digunakan” dan SUS (System Ussability Scale) mendapatkan hasil “accapteble” dengan 50 responden yang telah dilakukan.