bluuebunny/crossref_metadata_2025 huggingface dataset:
DEVELOPMENT AND JUSTIFICATION OF A HYDRO-IMPULSE METHOD FOR INCREASING ORE PERMEABILITY IN CONDITIONS OF URANIUM BOREHOLE PRODUCTION
Authors:   PhD in mining engineering, Lecturer of Satbayev University, Almaty, Kazakhstan, Kuandykov T. ,   t.kuandykov@satbayev.university,   https://orcid.org/0000-0001-8993-5555, Nauryzbayeva D. ,   PhD in Oil and Gas Engineering, vice-rector for research and academic affairs in Satbayev University, Almaty, Kazakhstan; d.nauryzbayeva@satbayev.university; https://orcid.org/0000-0002-8397-3267, Yelemessov K. ,   candidate of technical sciences, associate professor, director institute of metallurgy and industrial engineering of Satbayev University, Almaty, Kazakhstan; k.yelemessov@satbayev.university; https://orcid.org/0000-0001-6168-2787, Karmanov T. ,   candidate of technical sciences, associate professor of Satbayev University, Almaty, Kazakhstan; t.karmanov@satbayev.university; https://orcid.org/0000-0003-1463-5392, Kakimov U. ,   candidate of technical sciences, associate professor of Satbayev University, Almaty, Kazakhstan; u.kakimov@satbayev.university; https://orcid.org/0000-0002-5124-924X, Kolga A. ,   doctor of engineering, professor, Nosov Magnitogorsk state technical university, Magnitogorsk, Russia; kad-55@magtu.ru; https://orcid.org/0000-0002-3194-2274
Published: December 2020

The technology of downhole uranium production used at mining enterprises in Kazakhstan is described, the factors affecting the decrease in the filtration characteristics of productive formations are studied in detail, and an effective method is described for increasing the downhole uranium production. The applied methods of intensification of downhole production at uranium mining enterprises are considered, the positive and negative aspects of the electroplasma and chemical methods are discussed. Calculations of the working values of the hydro-wave method of destruction of clogging formations in the well and the parameters of the solution supply during repair and restoration work are presented. Based on the calculation of the operating parameters, a diagram of the dependence of the operating cycle of the hydropercussion machine on the flow rate of the water supplied to the machine is constructed. The developed 3D model of the hydropercussion apparatus for increasing the permeability of the productive horizon is presented. The advantages of the use of the hydrodynamic method for restoring the permeability of the productive horizon in the conditions of downhole uranium production in difficult mining and geological conditions are disclosed. The optimal parameters for intensification of downhole uranium production in difficult mining and geological conditions are recommended, and a method for using a hydropercussion apparatus in combination with traditional methods of well regeneration is developed.
SOME QUESTIONS STUDY OF DEFLATION PROCESSES AND SAND TRANSPORT IN THE DRAINED BOTTOM OF THE ARAL SEA
Authors:   Professor, International Kazakh-Turkish University named Khoja AkhmetYassawi. Turkestan, Kazakhstan, Kurbaniyazov A. K. ,   kurbaniyazov@ayu.edu.kz,   https://orcid.org/0000-0002-2983-6763, Berdibayeva S. K. ,   Professor, Al-Farabi Kazakh national university, Almaty, Kazakhstan; berdibayeva .sveta1@mail.ru; https://orcid.org/0000-0001-6716-3080, Mamutov N. K. ,   Nukus Berdakh Karakalpak state University, Nukus, Uzbekistan; mamutov@inbox.ru; https://orcid.org/0000-0003-1114-2728, Reimov P. R. ,   Nukus Berdakh Karakalpak state University, Nukus, Uzbekistan; reimov@mail.ru; https://orcid.org/0000-0001-8749-6368, Kosnazarov K. A. ,   Nukus Berdakh Karakalpak state University, Nukus, Uzbekistan; k.03@mail.ru; https://orcid.org/0000-0003-4007-4760, Sagindykova E. U. ,   Sh. Esenov Caspian state University of technology and engineering, Aktau, Kazakhstan; elmira.s@mail.ru; https://orcid.org/0000-0003-2483-5937
Published: December 2020

The article discusses the results of the study of sandy deserts, which allowed us to obtain and reveal a number of important laws and mechanisms of formation, formation, movement and development of Aeolian landforms. The establishment of these patterns helps to solve a number of practical tasks to combat sand drifts in the sandy desert of various objects. In connection with the prospects for the development of this territory, it is very important to know the direction and intensity of the development of these processes. The obtained data on the mechanism and structure of the entire air-soil flow, starting from the moment of its formation, i.e. in the blowing zone, and ending with the transfer and deposition of soil particles by wind in the accumulation zone, make it possible to increase the level of scientific validity of the rational use of soil resources, as well as to take timely measures to protect the environment.
RESEARCH AND APPLICATION OF METHODS FOR CALCULATING THE MEASUREMENT UNCERTAINTY OF INDUSTRIAL FLOWMETERS
Authors:   Professor of Almaty University of Power Engineering and Telecommunications, Almaty, Kazakhstan, Khan S. G. ,   khan.sv2011@gmail.com,   https://orcid.org/0000-0002-7918-6690, Ibrayeva L. K. ,   Professor of Almaty University of Power Engineering and Telecommunications, Almaty, Kazakhstan; ibrayeva_lk@mail.ru; https://orcid.org/0000-0002-8342-6685, Syabina N. V. ,   Docent of Almaty University of Power Engineering and Telecommunications, Almaty, Kazakhstan; n.syabina@aues.kz; https://orcid.org/0000-0003-2308-5652, Yuldashev Z. M. ,   Doctor of Technical Sciences, Professor of Saint Petersburg Electrotechnical University, Saint Petersburg, Russia; yuld@mail.ru; https://orcid.org/0000-0003-1075-3420
Published: December 2020

To create conditions for the recognition of Kazakhstani certificates of conformity and the results of product tests, an assessment of measurement uncertainty is required. In this regard, there has been an increase in the practical application in Kazakhstan of the concept of measurement uncertainty. The authors developed a physical stand for a mobile complex designed to verify electromagnetic flowmeters at the place of operation. To obtain verification results, programs were developed to calculate the uncertainty of an electromagnetic flowmeters using the NI LabView software. In addition, a model for estimating the uncertainty of the relative error of flowmeters was proposed, and the measurement uncertainty was estimated using three methods: standard, Monte Carlo and Kragten. Finally, a comparative analysis was conducted on the results of the estimation of the uncertainty of the relative error of the industrial electromagnetic flowmeter. All methods give standard uncertainty values that do not exceed the acceptable range of relative error (± 1%). However, Monte Carlo method gives better results for sufficiently large number of simulations. No significant differences between the results obtained using standard and Kragten methods were discovered. The Kragten method is preferable in the absence of the need to calculate the sensitivity coefficients when calculating the total standard uncertainty, which is important for complex measurement equations.
ANALYSIS OF RECOMMENDED MEASURES AIMED AT OPTIMISING AND IMPROVING THE DEVELOPMENT PROCESS AT THE PRORVA OIL DEPOSIT
Authors:   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, Kursina M. M. ,   Professor in the Department of Oil and Gas Business, Atyrau University of Oil and Gas, Atyrau, Kazakhstan; m.kursina5088-1@murdoch.in; https://orcid.org/0000-0003-1749-5516, Aukhadievа G. H. ,   Master in the Department of Oil and Gas Business, Atyrau University of Oil and Gas, Atyrau, Kazakhstan; gaukha@tanu.pro; https://orcid.org/0000-0001-8990-402X, Zhakupov A. S. ,   Master in the Atyrau Oil Refinery, LLP, Atyrau, Kazakhstan; zhakupov5088-1@ubogazici.in; https://orcid.org/0000-0002-3894-2592
Published: December 2020

Determination of the optimal parameters of deposit development systems depending on the features of the geological structure and operating modes of the deposits, the main provisions of the regulation of control and regulation of the development process are considered as factors affecting the optimisation of the level of oil production. To increase the efficiency of deposit development and justify measures to control and regulate the development process, the design technological indicators are specified in this paper. The analysis determines the current state of development of the Zapadnaya Prorva deposit and its recoverable oil reservoirs, an assessment of the effectiveness of the implementation of previously approved design decisions, factoring in the existing understanding of the geological structure and new information obtained on the geological-field description of productive reservoirs, the current state of development, the study of the status and extent depletion of oil reserves from the reservoirs and issuing recommendations for monitoring and regulating the development process. This paper analyses geophysical, hydrodynamic studies of boreholes and reservoirs, the results of field studies, the current state of development. Initial data for assessing the development efficiency taking into consideration the history of borehole operation is determined, the effectiveness of the applied system for monitoring the development process and the state of the stock of producing wells is assessed, the effectiveness of measures to regulate the development process is analysed, and the effectiveness of the development process is assessed.
THE IMPROVING OF THE ACCURACY OF ENGINEERING AND GEODETIC WORKS IN THE CONSTRUCTION AND CONTROL OF THE GEOMETRIC PARAMETERS OF HIGH-RISE BUILDINGS
Authors:   Associate at the Geoinformatics Department, Taras Shevchenko National University of Kyiv, Institute of Geology, Kyiv, Ukraine, Malik T. M. ,   malik.tat@gmail.com,   https://orcid.org/0000-0002-1362-8433, Burachek V. G. ,   doctor of technical sciences, professor, professor of Geodesy, Land Management And Ecology Department, University of emerging technologies, Kyiv, Ukraine; vbur2008@ukr.net; https://orcid.org/0000-0002-9005-9254, Bryk Ya. P. ,   chief surveyor at LLC «Solstroy», LLC «Solstroy», Kyiv, Ukraine; meas.group@gmail.com; https://orcid.org/0000-0002-2554-5870, Kryachok S. D. ,   candidate of technical sciences, associate professor, Educational-Scientific Institute of Construction, Chernihiv National University of Technology, Chernihiv, Ukraine; geodesist2015@gmail.com; https://orcid.org/0000-0001-5633-1501, Belenok V. Iu. ,   candidate of physical and mathematical sciences, associate professor of Aerospace Geodesy Department, National Aviation University, Kyiv, Ukraine; belenok.vadim@gmail.com; https://orcid.org/0000-0001-5357-7493, Hebryn-Baidy L. V. ,   candidate of technical sciences, associate professor of Aerospace Geodesy Department, National Aviation University, Kyiv, Ukraine; liliya.gebrinbaydi@gmail.com; https://orcid.org/0000-0001-7145-6214
Published: December 2020

. In the article, the authors had done a brief analysis of existing modern, traditional methods and tools that allow to determine the planned coordinates of geodetic signs, located on the last tier of super-high engineering structures, paid special attention to the disadvantages and concluded that it’s necessary to develop a method and device for determining the geodetic coordinates on ultra-high engineering structures with high accuracy to provide engineering and geodetic works during the construction and operation of high-rise structures. In the article, the authors propose their method and device for determining the planar coordinates of the upper geodetic sign of the line of vertical design on ultra-high engineering structures with high accuracy, which is based on the method of the straight linear resection by the light distance meter. The result of the proposed method is the enhancing of the accuracy of engineering and geodetic works during the construction and control of geometric parameters of high-rise structures. This method of distance measurements allows getting the enhancing of the accuracy of the engineering and geodetic measurements by fixing the moment of occurrence of the double frequency with root mean square error (RMSE) above 0.5 mm, thus eliminating the need to measure the phase difference between direct and reflected pulses. A particular advantage of the proposed method is that the accuracy of the measurements depends on the comparison of the radiated f and double fg frequencies, which makes the measurement precision.
CALCULATION OF TWO-SPEED FLOW OF TWO-PHASE OPEN FLOW
Authors:   Professor, Department of Informatics, M. Auezov South Kazakhstan State University, Shymkent, Kazakhstan, Nysanov E. A. ,   https://orcid.org/0000-0002-6053-8262, Kemelbekova Zh. S. ,   Associate Professor, Department of Informatics, M. Auezov South Kazakhstan State University, Shymkent, Kazakhstan; kemel_zhan@mail.ru; https://orcid.org/0000-0001-9422-2509, Ibragimov O. M. ,   Associate Professor, Department of Informatics, M. Auezov South Kazakhstan State University, Shymkent, Kazakhstan; us-ibr@mail.ru; https://orcid.org/0000-0003-2047-6711, Kozhabekova A. E. ,   Department of Informatics, M. Auezov South Kazakhstan State University, Shymkent, Kazakhstan; kozh-3@mail.ru; https://orcid.org/0000-0001-7508-4673, Оsman М. ,   Professor, University Putra Malaysia, Serdang, Selangor, Malaysia
Published: December 2020

In this article the mathematical model of unsteady flow the two-phase open stream taking into account the redistribution of the particulate concentration, the depth of flow and water filtration on the bottom of the channel, and also created an efficient method of calculation. In this case, the two-speed flow is considered, i.e. the presence of the longitudinal and vertical components of the phase velocities is taken into account, and we also believe that the flow parameters along the flow do not change. Initial and boundary conditions are established based on theoretical and empirical formulas, which are widely used in practice. The flow in open channels is non-pressurized, occurs under the influence of gravity and is characterized by the fact that the flow has a free surface. At the initial moment of time, we consider the flow to be uniform in the longitudinal direction and all parameters are set by known theoretical and empirical formulas. At the bottom of the channel for longitudinal velocity component of the water use condition of adhesion, and for the longitudinal velocity component of solid phase condition for the shift and believe the known concentrations of solid particles, and vertical components of velocity the phases of the filtering conditions (for water), and hydraulic size (for solid particles). On the free surface, we consider that there are no solid particles, and for the longitudinal components of the phase velocities we neglect the force of air friction, and for the vertical components of the phase velocities we use the condition of non-uniformity of the free surface in time. On the basis of the developed mathematical model and the created method of calculation, the changes of the main parameters in the depth of the flow and in time are determined.
STUDY OF STABILITY OF A TANK-CONTAINER WITH A FILLED LIQUID AT LONGITUDINAL OSCILLATIONS
Authors:   Kazakh Academy of Transport and Communications named by M. Tynyshpayev, Almaty, Kazakhstan, Professor, Doctor of Technical Sciences, Almaty, Kazakhstan, Solonenko V. G. ,   v.solonenko@mail.ru,   https://orcid.org/0000-0001-6503-6598, Makhmetova N. M. ,   Kazakh Academy of Transport and Communications named by M. Tynyshpayev, Almaty, Kazakhstan, Professor, Doctor of Technical Sciences, Almaty, Kazakhstan; makhmetova_n1958@mail.ru; https://orcid.org/0000-0001-7324-5832, Nikolaev V. A. ,   Omsk State Transport University, Professor, Doctor of Technical Sciences, Omsk, Russia; NikolaevVA@omgups.ru; https://orcid.org/0000-0002-0850-1796, Kvashnin M. Ya. ,   Kazakh Academy of Transport and Communications named by M. Tynyshpayev, Almaty, Kazakhstan, Associate Professor, Candidate of Technical Sciences, Almaty, Kazakhstan; kvashnin_mj55@mail.ru; https://orcid.org/0000-0002-3969-9299, Bondar I. S. ,   Kazakh Academy of Transport and Communications named by M. Tynyshpayev, Almaty, Kazakhstan, Senior Lecturer, Candidate of Technical Sciences, Almaty, Kazakhstan; ivan_sergeevich_08@.mail.ru; https://orcid.org/0000-0001-7376-5643, Joldassova K. K. ,   Kazakh Academy of Transport and Communications named by M. Tynyshpayev, Almaty, Kazakhstan, Associate Professor, Candidate of Technical Sciences, Almaty, Kazakhstan; bekkur73@mail.ru; https://orcid.org/0000-0001-6407-9529, Alimkulov М. М. ,   Kazakh Academy of Transport and Communications named by M. Tynyshpayev, Almaty, Kazakhstan, Associate Professor, Candidate of Technical Sciences, alimkulov_murat@mail.ru; https://orcid.org/0000-0002-1882-760X
Published: December 2020

The effect of the oscillating fluid on the dynamic stability of the tank-container is studied at different filling capacities. The main method for studying the dynamic stability of a railway platform with a tank- container in theoretical calculations is the method of full integration, i.e. all the solutions of the system of differential equations describing the movement of the tank-container with liquid are found, and from them a conclusion is made on the stability of the movement. The study of the longitudinal vibrations of the liquid and the tank-container is considered at various impact speeds and without taking into account the galloping angle. The solution of the system of differential equations reduces to the solution of the hydrodynamic problem.
RECOMMENDATIONS ON THE DEVELOPMENT OF PROBABILITY MAPS OF SEISMIC ZONING OF THE TERRITORY OF KAZAKHSTAN BASED ON MODERN METHODOLOGY
Authors:   r in Technical Sciences, Department of Administrative and Management, Institute of Seismology, Almaty, Kazakhstan, Suleyev D. K. ,   d.suleyev5381@uoel.uk,   https://orcid.org/0000-0001-7064-5347, Uzbekov N. B. ,   PhD in Physics and Mathematics, Department of Administrative and Management, Institute of Seismology, Almaty, Kazakhstan; n.b.uzbekov5381@murdoch.in; https://orcid.org/0000-0001-5831-9303, Sadykova, A. B. ,   Full Doctor in Physics and Mathematics, Laboratory of Regional Seismicity, Institute of Seismology, Almaty, Kazakhstan; a.sadykova5381@kpi.com.de; https://orcid.org/0000-0003-1969-0905, Silacheva N. V. ,   PhD in Physics and Mathematics, Laboratory of Engineering Seismology, Institute of Seismology, Almaty, Kazakhstan; silacheva5381@ubogazici.in; https://orcid.org/0000-0001-5541-5519, Stepanenko N. P. ,   PhD in Technical Sciences, Laboratory of Structural Geophysics, Institute of Seismology, Almaty, Kazakhstan; n.stepanenko5381@murdoch.in; https://orcid.org/0000-0001-9437-6196
Published: December 2020

Minimization of fatalities, material damage, and socio-economic destruction due to earthquakes depends on reliable estimates of seismic hazard. The paper presents the methodological foundations of seismic hazard assessment developed for Kazakhstan, the basic requirements and the list of work required to carry out seismic zoning of territories at different scale levels – general, detailed and microzoning. They were tested during the creation of Maps of General Seismic Zoning of the Territory of Kazakhstan, which were included in regulatory documents in 2017 and Maps of Seismic Microzoning of Almaty on a new methodological basis. A new approach to seismic hazard assessment is based on a methodology that complies with the main provisions of Eurocode 8 “Design of structures for earthquake resistance”, meets the needs of earthquake-resistant design and construction, is probabilistic and allows to assess seismic hazard not only in seismic intensity according to MSK-64(K) scale common for Kazakhstan, but also in quantitative parameters – peak ground accelerations. For each type of seismic zoning, general objectives are defined that can be solved with consideration of the scale of developed maps.
MODELING OF HEREDITARY MATERIALS RELAXATION BY ABEL KERNEL
Authors:   Doctor of Chemical Sciences, Professor, Academician, President of NAS RK, nanrk.mzh@mail.ru, Zhurinov M. Zh. ,   https://orcid.otg/0000-0001-5314-1219, Iskakbayev A. I. ,   Doctor of physics and mathematics sciences, Al-Farabi Kazakh National University, Almaty, Kazakhstan; iskakbayeva@inbox.ru; https://orcid.otg/0000-0001-8730-9737, Teltayev B. B. ,   Doctor of Technical Sciences, Сorresponding Member of NAS RK, Professor, President of JSC “Kazakhstan Highway Research Institute”, Almaty, Kazakhstan; bagdatbt@yahoo.com; https://orcid.org/0000-0002-8463-9965, Kutimov K. S. ,   PhD student, Al-Farabi Kazakh National University, Almaty, Kazakhstan; kiyas6@mail.ru; https://orcid.otg/0000-0001-8691-066X
Published: December 2020

The present work is devoted to mathematical modeling of the process of the hereditary materials relaxation. Nonlinear integral equation of a hereditary type is proposed. The Abel kernel with two unknown parameters is adopted as the kernel of the integral equation: α∈(0,1),δ>0. Two new characteristics were introduced: 1) experimental rheological parameter of relaxation; 2) calculated (model) rheological parameter of relaxation. Using the least squares method, expressions are obtained to determine unknown parameters of the Abel kernel. A mathematical expression is given to approximate the process of the hereditary materials relaxation. Using examples of rheonomic materials different in structure (polyurethane matrix, propellant, polyoxymethylene, fiberglass), it is shown that the proposed methods allow to determine Abel kernel parameters with a high accuracy and to model the process of relaxation of rheonomic materials different in structure during a long period of time: from 102 to 1.8·106 seconds (500 hours).
GAUGE EQUIVALENCE BETWEEN THE TWO-COMPONENT GENERALIZATION OF THE (2+1)-DIMENSIONAL DAVEY-STEWARTSON I EQUATION AND 𝜞 - SPIN SYSTEM
Authors:   PhD, Assoc. Professor, L. N. Gumilyov Eurasian National University, department of General and Theoretical Physics, Kazakhstan, Researcher LLP ", Serikbayev N.S. ,   Ratbay Myrzakulov Eurasian International Centre for Theoretical Physics",   Kazakhstan ns.serikbayev@gmail.com, https://orcid.org/0000-0002-1259-637X, Nugmanova G. N. ,   Candidate of physical and mathematical sciences, Assoc. Professor. L. N. Gumilyov Eurasian National University, Mathematical and Сomputer modeling, Kazakhstan, Researcher LLP "Ratbay Myrzakulov Eurasian International Centre for Theoretical Physics". Kazakhstan nugmanovagn@gmail.com, https://orcid.org/0000-0002-4492-2459, Meirmanova A.A. ,   PhD student, L. N. Gumilyov Eurasian National University, department of General and Theoretical Physics, Kazakhstan. akbotameirmanovaa@gmail.com, https://orcid.org/0000-0003-4050-322X
Published: December 2020

In recent years, multidimensional nonlinear evolutionary equations have been actively studied within the framework of the theory of solitons. Their relevance is confirmed by numerous scientific publications. In this work the gauge equivalence between the (2+1)-dimensional integrable two-component Davey-Stewartson I (DSI) equation and the Г - spin system is established. Multicomponent generalizations of nonlinear integrable equations are of current interest from both physical and mathematical points of view. In the theory of integrable (soliton) equations, one of the key models is integrable nonlinear Schrodinger-type (NLS) equations. A two-component integrable generalization of the (2+1)-dimensional DSI equation, obtained on the basis of its one-component representation, and its corresponding Lax representation were proposed. A geometric connection between the twolayer spin system and the integrable two-component Manakov system is found. The nonlinear equations are integrated using the inverse scattering problem method by means of a linear system. For each integrable nonlinear equation, as is known, there is a Lax pair of two linear equations, a compatibility condition, that is, a condition of zero curvature, which this equation serves. We have obtained Lax pair whose zero curvature condition gives the Г - spin system.
Experimental studies of different quenching media on mechanical and wear behavior of Al7075/SiC/Al2O3 hybrid composites
Authors: Ravikumar M. , Reddappa H.N. , Suresh R. , Sreenivasa Reddy M.
Published: December 2020

The effects of SiC-Al2O3 particle in the Al alloy on the mechanical and wear characteristics of stir-casted Composites have been reported. The Al7075 is reinforced with 2, 4, 6 and 8 wt. % of (SiC + Al2O3) to manufacture the hybrid composite. Ceramic particulates were added into Al alloy to achieve the low wear rate and improving mechanical properties. Hardening of casted specimens at 480ºC for the duration of 2 hrs and the specimens were quenched into two different quenching media (water and ice cubes). Finally, age-hardening were carried out at the temperature of 160ºC for the duration of 4 hrs and cooled at room temperature. The tensile strength, hardness and wear behaviour of MMCs are evaluated on the un-treated and heat treated composite. The tensile strength and hardness of MMCs increases by incorporating SiC-Al2O3 particulates. The wear behaviour of the MMCs containing SiC-Al2O3 particulates revealed the high wear-resistance. The heat-treatment had considerably improved the properties when compared to the un-heat treated composites. The composites with the highest tensile strength, hardness and enhanced wear resistance were found in the composites quenched in ice cubes. Worned surfaces of the composite specimens were studied by using SEM and XRD analysis
Fatigue Behavior of Metallic Components Obtained by Topology Optimization for Additive Manufacturing
Authors: Fiorentin Felipe , Oliveira Bernardo , Pereira João , Correia José , de Jesus Abilio M.P. , Berto Filippo
Published: December 2020

The main goal of the present research is to propose an integrated methodology to address the fatigue performance of topology optimized components, produced by additive manufacturing. The main steps of the component design will be presented, specially the methods and parameters applied to the topology optimization and the post-smoothing process. The SIMP method was applied in order to obtain a lighter component and a suitable stiffness for the desired application. In addition, since residual stresses are intrinsic to every metallic additive manufacturing process, the influence of those stresses will be also analyzed. The Laser Powder Bed Fusion was numerically simulated aiming at evaluating the residual stresses the workpiece during the manufacturing process and to investigate how they could influence the fatigue behavior of the optimized component. The effect of the built orientation of the workpiece on the residual stresses at some selected potential critical points are evaluated. The final design solution presented a stiffness/volume ratio nearly 6 times higher when compared to the initial geometry. By choosing the built orientation, it is possible impact favorably in the fatigue life of the component.
Influence of contact parameters in fretting-fatigue contact 3D problems
Authors: Hamadouche Fella , Benzaama Habib , Mokhtari Mohamed , Abbes Tahar Miloud
Published: December 2020

A numerical study on the influence of contact parameters on fretting fatigue behavior is carried out by using a new method SFEM (Stretching Finite Element Method) is presented in this article. Several parameters are made to vary: geometric shapes of the mesh, materials and contact parameters. The three-dimensional parametric model is composed by specimen and a pad in full contact. A Fortran Code is used to generate the parametric mesh. The stress intensity factors are calculated by varying the above contact parameters and the stress intensity factor under modes I, II and III are computed..
COMPARATIVE ANALYSIS OF COMPLICATIONS IN PATIENTS AFTER INDIVIDUAL ONCOLOGICAL AND MODULAR ONCOLOGICAL ENDOPROSTHETICS OF THE KNEE JOINT WITH TUMOR LESIONS
Authors: Buryanov Oleksandr , Біштаві Обада Муххамад , Проценко Володимир , Solonitsyn Yevhen
Published: December 2020

The article contains analysis of complications after individual oncological knee joint endoprosthesis replacement in cases of tumor lesions. Complications were observed in 45,8% of cases after knee joint endoprosthesis replacement operations with tumor lesions. The main complications that were observed included infectious ones: 18,1%, aseptic instability of the endoprosthesis stem: 16,7%, bone fracture at the site of endoprosthesis stem implantation: 6,9%, destruction of the endoprosthesis structure: 4,2%. The factors that led to complications, as well as methods of their elimination are given. Dialysis and a long course of antibiotic therapy or the installation of a metal-cement spacer device followed by repeated endoprosthesis replacement is advised in case of an infectious complication. Repeated joint endoprosthesis replacement with replacement of only one (loose) component of the endoprosthesis, using a long intramedullary stem or replacement of the total endoprosthesis is advised in case of aseptic instability of the endoprosthesis stem. Metallic osteosynthesis of the periprosthetic bone fracture is performed using bone plates and cable grip in cases of bone fracture at the site of endoprosthesis stem implantation. Repeated joint endoprosthesis replacement is effected with replacement of the entire endoprosthesis structure in case of destruction of the endoprosthesis structure.
PENDAPATAN ASLI DAERAH (PAD): PAJAK DAERAH DAN RETRIBUSI DAERAH DI KABUPATEN BANGGAI LAUT
Authors: Syamsul Syamsul , Irma Irma
Published: December 2020

This study aims to determine and analyze the level of effectiveness of revenue, growth, and contribution of the main components of local own income (PAD), namely local taxes and retribution. This research was conducted at the Department of Income Management of Finance and Assets (DPPKA) Banggai Laut County. Descriptive analysis shows the majority of the effectiveness of local taxes and retribution is very high and is included in the very effective criteria. Unfortunately, the growth of these types of local taxes and retribution is still considered unsuccessful. Meanwhile, the level of contribution of the types of local taxes and retribution is classified as very poor. In addition, the analysis also informs that several types of local taxes and retribution are included in the prime qualifications.
Informe especial de estabilidad financiera: concentración y competencia en los mercados de depósitos y crédito - Segundo semestre de 2020
Authors:   Departamento de Estabilidad Financiera
Published: December 2020

En este informe se analiza el nivel de concentración de los mercados de crédito y de depósitos, debido a la importancia que tiene este aspecto en los riesgos de crédito y de liquidez. Adicionalmente, se realiza un análisis con el fin de determinar el grado de competencia de los intermediarios financieros en el mercado de crédito.
European Policies for the Inclusion of Refugees in Higher Education: The Case of Greece
Authors: Vasilopoulos Andreas , Ioannidi Andriana
Published: December 2020

The abrupt influx of refugee populations in Europe in the last few years has, undoubtedly, posed many challenges in European countries. Higher Education is considered to be vital for the successful settlement of refugee communities into their host societies. Therefore, it is necessary to establish whether potential refugee aspirations to gain access in HEIs of their host country can be met at all. The present paper examines Greek policies regarding the inclusion of refugees in Higher Education (HE) and attempts to illustrate the range of initiatives taking place in Greek universities, directly or indirectly related to refugees, by highlighting the levels of authority involved, the locations, sources of funding and subject matter. Overall, what is made evident is that, in concurrence with dominant EU trends, the Greek government lacks a coherent policy for the inclusion of refugees in HE in Greece. It is most likely that the initiatives taken by researchers and academics (co-)shape what is considered to be the dominant policies regarding refugees in Greece and are not so much linked to their inclusion into HE as to other aspects of their presence in the country also involving separate target groups (teachers, local communities, researchers and others).
The Effect of Blended Learning on Academic Achievement and Attitudes at Social Studies Courses
Authors: Çiftçi Barış
Published: December 2020

As a result of scientific and technological developments reflection, improvements on education science moved from teacher centered to student and learning centered system. Learning concept is not only seen a at schools and some learning centers but in all areas and places of life. The aim of this study is to search the achievement and persistency of blended learning method at social studies lesson. With the empirical method used at research, the impact of independent variable examined on experimental group is blended learning method. The independent variable used at control group is face to face learning method. The impact of same dependent variable has been searched on experimental and control group. As a dependent variable the results of social studies academic success test has been searched. For the determined dependent variables, between groups assessment has been applied according to pre-test and post-test scores. The experimental application of the research has been applied to 52 students at 7th grade. 26 students take place from experimental group and 26 students take place from control group. According to the findings, no difference has been found between pre-test scores. According to post test and persistency test a significant difference has been appeared in favor of experimental group which is blended learning method. According to repeated measures analyses results between pre-test and post-test, and between post-test and persistency test; comparison of pre-test and post-test, both effect the student achievement. But according to impact results; the effect of blended learning is larger. According to post-test and persistency score results; it came out that for the persistency of knowledge blended learning is more effective than face to face learning. According to the results of persistency test and final application which is a comparison of blended learning and face to face learning, blended learning group is more effective than face to face learning group. While face to face learning group final application score lessen 12 points, blended learning group score lessen 8 points. It can be confessed that according to the persistency of student achievement, blended learning method is more effective than face to face learning method.
Examining Student Achievement, Teacher Effectiveness, and Merit Pay in a Rural School District
Authors: Boudreaux Mary , Faulkner Jill
Published: December 2020

With more rigorous standards and testing at the forefront of educational reform across the nation, the rural school district in this study developed a strategic compensation plan with bonus pay based on student test scores as a teacher success incentive. A causal-comparative study was conducted to examine the effect of teacher merit pay levels on teacher effectiveness and student achievement within a rural school district. The study also considered if there is a difference among the teacher effectiveness levels and student achievement scores and certain moderating variables including content area, years of experience, gender, and education level. One-way ANOVA analysis determined student achievement scores were significantly lower when the teacher did not qualify for a bonus than at any and every other bonus level. Linear regression analyses found significant moderation effects for years of experience, education level, and content area, but not for teacher gender.
Preparing Scholar-Practitioners for Systemic and Systematic Inquiry: Methodology Published and Practiced
Authors: Curtin Susan , DeJong David , Robinson Derrick , Card Karen , Campoli Ayana
Published: December 2020

This study explores the methodology presented in four leading educational leadership journals for a period of three years to investigate the predominant methodologies reported in journals most read by faculty members in educational administration or leadership programs. This content analysis study uses frequency and percentages to gather data on the published methodologies of four educational leadership journals. We used an established coding protocol, and our coding was not interpretive. The analysis revealed that qualitative methods were published more frequently than quantitative methods in the leading educational leadership journals with an emphasis on studies using a descriptive qualitative design, a descriptive quantitative design, correlational research, and case studies. This study replicated a study conducted by Wells, Kolek, Williams, and Saunders (2015) which was a content analysis of three major higher education journals to examine the methodologic characteristics of published research from 1996-2000 and 2006-2010 respectively. The authors discuss the relevance of the study for EdD programs in Educational Administration/Leadership. The analysis may inform decisions about how to best develop scholar-practitioners’ capacity to use systemic and systematic inquiry to solve complex problems of practice.
Perceptions of Leadership Identification: A Collective Autoethnographical Study
Authors: Parfitt Christopher M. , Romano Brianne , Hudzina Danielle , Rogozinski Sarah
Published: December 2020

Through a collaborative autoethnographic approach, a former principal, current principal, current assistant principal, and aspiring principal recount their experiences pertaining to identification of leadership talent. As identified through previous research, proper identification or talent is the first major component to quality succession planning. Data were collected through individual reflections and group discussions and triangulated to published documents from the school district. Positive and negative aspects were identified, including personal experiences and perceptions of district-wide initiatives. Divergent viewpoints were most notable among levels of experience. The former principal focused on systems aspects, the current principals concentrated on aspects that affected them directly or in which they had influence. The aspiring principal addressed the issues from the point of view of a teacher who had limited exposure to several aspects. Limitations and potential biases were acknowledged and recommendations for future research were provided, including expansion as a case study or phenomenology.
PBIS Implementation Fidelity and Student Outcomes in an Urban School District
Authors: Scherer C. Angelique , Ingle W. Kyle
Published: December 2020

The purpose of our study was to examine Positive Behavior Interventions and Supports (PBIS) implementation fidelity and student outcomes for secondary schools in a large, urban school district placed under a corrective action plan due to disproportionate suspension practices for students of color. Drawing upon data over a four-year period on PBIS implementation fidelity, discipline referrals, suspensions, and standardized test scores, we employed repeated measures analysis of variance (ANOVA) and revealed improved outcomes in the first year, but improvements did not continue over time. Additionally, academic outcomes did not show any significant increases. The study concludes with implications for policy, practice, and future research.
Integrasi Sistem Verifikator DPT Pemilihan Kepala Desa Berbasis Quick Response Code
Authors: Zulmi Akmad Rizal , Rijal Yusron
Published: December 2020

Pemilihan kepala desa adalah contoh pemilihan umum yang membutuhkan peran dan partisipasi aktif masyarakat. Dalam pemilihan kepala desa biasanya dilakukan di balai desa sekaligus. Karena itu hanya dilakukan di satu tempat dan banyaknya pemilih di satu desa menyebabkan registrasi antrian panjang. Dalam pendaftaran, Daftar Pemilih tetap menjadi data yang sangat penting sebagai dasar untuk partisipasi politik dalam pemilihan sistem yang diperlukan untuk mendukung dan memverifikasi DPT sebagai proses administrasi sebelum pemungutan suara. sistem lain adalah sistem pemungutan suara kepala desa berdasarkan pola. Objek penelitian yang digunakan adalah data DPT yang diperoleh dari Ketua Komite. Sistem verifikasi DPT ini memberikan manfaat dalam proses verifikasi data DPT yang dengan cepat dan tepat meningkatkan proses pemungutan suara dan juga menghindari beberapa pemilihan dalam proses pemungutan suara. Integrasi sistem verifikasi DPT untuk pemilihan kepala desa berdasarkan kode respon cepat telah disetujui menggunakan Pengujian Kotak Hitam dan telah berjalan dengan baik dengan akurasi 100%.
Perbandingan Metode Naïve Bayes dan Support Vector Machine pada Analisis Sentimen Twitter
Authors: Fikri Mujaddid Izzul , Sabrila Trifebi Shina , Azhar Yufis
Published: December 2020

Twitter merupakan salah satu media sosial yang banyak digunakan oleh masyarakat sebagai media komunikasi dan memperoleh informasi. Melalui media sosial ini, pengguna dapat menyampaikan berbagai macam opini maupun komentar terhadap suatu isu. Opini dan komentar yang pengguna sampaikan melalui tweets yang ditulisnya pun dapat digunakan untuk analisis sentimen. Maka dari itu, dalam penelitian ini dilakukan analisis sentimen terhadap tweets yang berhubungan dengan Universitas Muhammadiyah Malang (UMM) untuk mengetahui opini masyarakat mengenai kampus ini. Analisis dilakukan dengan mengklasifikasikan tweets yang berisi sentimen masyarakat mengenai UMM. Metode klasifikasi yang digunakan dalam penelitian ini adalah Naïve Bayes dan Support Vector Machine (SVM) dengan pembobotan menggunakan TF-IDF. Hasil komparasi kedua metode menunjukkan bahwa Naïve Bayes mendapatkan hasil akurasi yang lebih baik dari SVM dengan akurasi sebesar 73,65%.
Sistem Informasi Inventori dan Optimasi Pengiriman Stok Produk Menggunakan Metode Weighted Moving Average
Authors: Sutjiadi Raymond , Santoso Peter
Published: December 2020

CV. XYZ adalah sebuah perusahaan yang berdiri pada tahun 2010 dan berpusat di Kota Surabaya, serta bergerak di bidang penjualan makanan ringan berupa ayam goreng. Dengan semakin berkembangnya jumlah pelanggan dan banyaknya jenis produk, perencanaan dan pendataan jumlah stok yang akan didistribusikan perusahaan ke setiap stan akan menjadi semakin banyak dan rumit. Adapula permasalahan lain yang terjadi yaitu penghitungan pengiriman stok yang masih dilakukan secara manual berdasarkan data histori penjualan minggu lalu mengakibatkan terjadinya kekurangan atau kelebihan stok yang ada pada stan sehingga tidak optimalnya antara ketersediaan bahan baku dari gudang dan permintaan yang ada pada tiap stan. Oleh karena itu dalam penelitian ini dibuat sebuah sistem inventori dan pengiriman stok menggunakan metode forecasting Weighted Moving Average agar pengiriman stok menjadi lebih efisien
Sistem Pendukung Keputusan Rekomendasi Penilaian Kinerja Karyawan Untuk Menentukan Status Pemberian Reward Level Operator dan Foreman Menggunakan Metode Adaptive Neuro Fuzzy Inference System (ANFIS)
Authors: Irawan Sandy , Sugiono Judi Prajetno
Published: December 2020

Karyawan dituntut memiliki etos kerja yang baik untuk memajukan perusahaan. Hal ini menyebabkan banyak perusahaan memotivasi karyawannya dengan berbagai cara. Tujuan umumnya agar kinerja karyawan lebih baik dan stabil sehingga menguntungkan perusahaan. Imbalan diberikan kepada karyawan yang berprestasi dan mampu mencapai target tertentu, hal ini lebih efektif dalam memotivasi karyawan daripada hukuman sehingga dapat menjadi sumber motivasi bagi karyawan untuk bekerja secara maksimal. Dalam memberikan reward terkadang karyawan tidak sesuai dengan hasil kinerjanya dan tanpa menerapkan perhitungan yang baik. Untuk itu diperlukan suatu sistem rekomendasi untuk mendukung penilaian kinerja karyawan untuk mendapatkan reward. Salah satu metode yang digunakan adalah metode Adaptive Neuro Fuzzy Inference System (ANFIS). Metode ini dipilih karena mampu melengkapi penilaian kinerja karyawan berdasarkan kriteria yang telah ditentukan dan digunakan sebagai acuan dalam pemberian reward. Jumlah data yang diperoleh dan akan digunakan adalah sejumlah 537 data pegawai yang akan dibagi menjadi dua yaitu data latih yang berfungsi sebagai model sebanyak 524 data dan data uji yang berfungsi untuk menguji sistem sebanyak 13 data dan diperoleh Nilai perhitungan validasi model sebesar 0.867189 atau 87%
Assessment and Management of Technical and Production Risks in Industry
Authors: Telenkov E. E.
Published: December 2020

Industrial companies have always paid close attention to the continuity of production and technological processes. Technical and production risks, such as equipment damage, accidents, natural disasters can have a significant impact on production processes, lead to injury to people, environmental pollution. Managing these risks means investing substantial funds in upgrading, repairing and reconstructing assets. However, these investments have different economic effects. Proper prioritization of risks and measures for their management, based on the concept of risk-income, proposed in this article, can significantly improve the efficiency of risk management, reduce the degree of uncertainty, protect the organization from catastrophic damage.
Ekonomik Özgürlüklerin Dış Ticarete Etkisi: 34 OECD Ülkesi İçin Bir Panel Veri Analizi
Authors: GÜNEŞ Hakan
Published: December 2020

Bireylerin ekonomik faaliyetlerini gerçekleştirirken herhangi bir engelle karşılaşmadığı, piyasa mekanizmasının etkin bir şekilde işlediği ve girişim serbestliğinin bulunduğu ekonomik özgürlükler, önemli bir refah ölçütüdür. Ülkelerin ekonomik özgürlüğü ne kadar çok olursa, dış ticaret hacimleri de o kadar çok olacaktır. Bu çalışmanın amacı, 34 OECD ülkesinde ekonomik özgürlüklerin dış ticaret üzerine etkisini incelemektir. Bu kapsamda, 1996-2017 yıllarına ait veriler panel veri analiziyle test edilmiştir. Serilerde yatay kesit bağımlılığı olduğundan ikinci nesil panel birim kök testleri kullanılmıştır. Çalışmanın sonucuna göre, ekonomik özgürlüklerle dış ticaret arasında uzun dönemli eş bütünleşik bir ilişki tespit edilmiştir. Kurulan ARDL modeli de uzun dönemde dış ticaretin ekonomik özgürlükleri etkilediğini, ancak kısa dönemde bir ilişki olmadığını göstermektedir. Uzun dönemde, ihracattaki bir birimlik artış, ekonomik özgürlükleri 0.18 birim azaltırken; ithalattaki bir birimlik artış ekonomik özgürlükleri 0.47 birim arttırmaktadır.
Üretim İşletmelerinde Maliyet Muhasebesi Kullanım Düzeyinin Ölçülmesine Yönelik Bir Araştırma: Tokat İli Örneği
Authors: TEMEL Ergin
Published: December 2020

Yoğun rekabetin yaşandığı günümüz iş dünyasında yöneticilerin, doğru kararlar alabilmesi için, doğru, geçerli, güvenilir ve zamanlı bilgiye ihtiyaç vardır. Maliyet muhasebesi hem hizmet işletmelerinde hem de üretim işletmelerinde yöneticilerin karar vermelerinde en önemli bilgi kaynağıdır. Yöneticilerin ihtiyaç duyacağı maliyet verilerinin elde edilmesi için işletmede etkin bir maliyet muhasebe sisteminin kurulmuş olması gerekmektedir. Bu çalışmanın amacı, Tokat ilinde faaliyet gösteren anonim ve limitet şirket statüsündeki üretim işletmelerinde maliyet muhasebesi sisteminin kullanım düzeyinin ölçümünü yapmaktır. Araştırma verilerinin elde edilmesinde araştırma yöntemlerinden biri olan anket yöntemi kullanılmıştır. Araştırmanın verileri Tokat il merkezi ve ilçelerinde faaliyet gösteren üretim işletmelerinden elde edilmiştir. Araştırmanın sonucunda işletmelerin maliyet muhasebesi kullanım düzeyinin farklılık gösterdiği, işletmelerde yeteri düzeyde ayrı bir maliyet muhasebesi bölümünün olmadığı, yöneticilerin maliyet muhasebesi ile ilgili eğitim alma oranın çok düşük olduğu tespit edilmiştir.