bluuebunny/crossref_metadata_2025_split huggingface dataset:
Improving the reliability of determining physical properties of heterogeneous clay reservoir rocks using a set of techniques
Authors: Malyarenko A M , Bogdan V A , Blinov S A , Kotenev Yu A , Mukhametshin V Sh , Kotenev M Yu 
Published: February 2021

Abstract
Oil-water-saturated formations of Western Siberian fields represented by polymictic sandstones are often characterized by strong granulometric heterogeneity. This is the reason for an incorrect assessment of the physicochemical properties of reservoirs, including wettability. On the example of the BS9 - BS11 formations of two fields of Surgut oil and gas region, the distribution of wettability of core samples was analyzed. An analysis of the modeling results for the hydrocarbon phase displacement by oil-saturated reservoir water was carried out using the Tulbovich method. To assess reliability of the wettability values, it was proposed to correlate the difference in the masses of water and kerosene displaced during capillary impregnation and centrifugation with differences in the mass of water and kerosene in water-and kerosene-saturated samples. The method was used to plot the distribution of porosity, permeability and relative clay content on the wettability parameter by capillary impregnation and centrifugal displacement. The results obtained were compared with similar dependences of the reservoir properties and clay content on the general wettability parameter. The type of wettability of core samples with good reservoir properties is validated in complex, low-permeability reservoirs with a high content of clay material. It is recommended to use the results of modeling the displacement by capillary impregnation and centrifugation with differences in the mass of water and kerosene.
Characteristics of Prospective Student Teacher’s Representation in Solving Ill-Well Algebraic Problems
Authors: Santia Ika , Purwanto  , Subanji  , Sudirman  , Sutawidjadja Akbar 
Published: February 2021

Abstract
Mathematical representation is an important aspect of mathematical problem-solving. But prospective student teachers’ ability of a mathematical representation in ill-structured problem solving is still very limited compared to that in well-structured problem-solving. However, ill-structured problems supported mathematical abstraction used in mathematical concept understanding. This study described the characteristics of prospective student teachers’ representations and translation among representation in ill-structured and well-structured social algebraic problem-solving. Thirty Indonesian prospective students teachers have to solve the ill-well algebraic problems by using think-aloud while recorded using a video recorder and the researchers observed by writing on a field note to record the important events. Data were analyzed using a comparative method so that it was obtained the different characteristics of representations between solving ill-structured and well-structured problems. The result showed that verbal and symbolic representations used by subjects to compute, detect and correct an error, and justify their answers in ill-structured problem solving but visual representation only used by the first subject to detect and correct error. The subjects lack to uncover necessary information to solve the ill-Structured problem compared to that of a well-structured problem. It means that representation is important to be studied further because it affected to ill-structured problem ability.
Needs Assessment QR Code Combination with Google Form for Online Cognitive Assessment
Authors: Firmansyah Guntur , Dwi Rahayu Ervin , Hariyanto Didik , Irwansyah  , Setyawan Trinovandhi , Muhamad Aris Tria 
Published: February 2021

Abstract
This study aims 1) to develop online cognitive assessment instruments that meet instrument criteria such as validity, reliability, level of difficulty, different power, 2) develop online cognitive assessment instrument using a combination of qr code and Google forms. The research method refers to the Borg and gall R&D research method. The research subjects were students who were taking theoretical and practice courses on table tennis physical education and recreation education program IKIP Budi Utomo Malang Class of 2017. The results of the initial research of the needs analysis phase given to students and lecturers were 1) cognitive assessment instruments used were still have not met the eligibility criteria, 2) online media has not been used to conduct cognitive assessments, 3) students and lecturers agree if an online cognitive assessment instrument is developed in accordance with the instrument eligibility criteria and the media used a combination of qr code with Google forms.
Dialogic-Interactive Media Design for Language Learning To Improve Speaking Activities and Skills
Authors: Atmazaki  , Ramadhan Syahrul , Indriyani Vivi , Nabila Jeihan 
Published: February 2021

AbstractAbstract.Technology is an unavoidable resource in the education sector, Technology can facilitate learning offline or online. Technology can be used for language learning. Therefore, the purpose of this study is to produce dialogic-interactive media used in Indonesian language learning to improve student learning activities and outcomes. This type of research is development research using Plomp Model (1997) which consists of three phases, namely (1) preliminary research phase; (2) prototype phase; and (3) assessment phase. The study was conducted to develop a product that is dialogic-interactive media to improve learning activities and speaking skills of secondary students in learning Indonesian. Based on the research stages, this article will explain the results of research in the design phase. The data analysis technique used in this study is a descriptive data analysis technique that describes the validity of the learning model. The research instrument was a questionnaire. Based on the results of the questionnaire analysis, it was concluded that the syntax for the development of dialogic-interactive media was categorized as very valid and could be used as a model for the development of instructional media that would be tested in schools.
Learning Management System and EFL Classes: A Way to Promote Autonomous Blended Learning
Authors: Fitrawati  
Published: February 2021

Abstract
This article aims to point out the advantages of using the Learning Management System to increase EFL learner skills and introduce it as one of the aid to support autonomous blended learning. This article also explains how LMS supports e-learning in learning language. Then, it shows how the e-learning can be implemented with using some models in teaching and learning process.
Incorporating both Zoom and YouTube in Micro Teaching Class during the Covid-19 Pandemic: An Effectiveness Investigation
Authors: Roza Veni 
Published: February 2021

Abstract
The article aims at seeking the effectiveness of incorporating both Zoom and YouTube in Micro teaching class by webinar. This class at the first was conducted traditionally by face-to-face interaction in the classroom. After that the Covid-19 pandemic came, all systems were shocked and changed. Students and lecturers had to keep distance socially and physically by learning and working at home. So, all Micro teaching classes were carried out on line by using internet aid using applications such as Zoom and YouTube. The research used quantitative method by distributing questionnaire to students and lecturers after they used the applications during the teaching learning process. Students’ scores in teaching performance were also considered to seek the effectiveness. The sample was selected purposively since not all lecturers applied webinar in their classes. The finding reveals that incorporating both zoom as a synchronous learning model and YouTube as an asynchronous one is effective in teaching micro teaching based on the lecturers’ responses in the questionnaires and viewed from students’ score in final teaching performance which was shared via YouTube in the middle of pandemic era.
Blending Technology with Post Method Pedagogy for Teaching Learning Process
Authors: Depalina Siregar Syamsiah , Lubis Mukhlis , Kohar  , Daud Batubara M. , Asrin Ahmad 
Published: February 2021

Abstract
Pandemic era bring new paradigm in teaching learning process. The lecturers must work hard to create new model, new strategies, and new ways in transmitting their information to the students. This study appears blending technology with post method pedagogy, where the learning process focuses on students need. There are three principles of post method pedagogy, they are particularity, practically, possibility. The lecturers blend conventional interaction with learning based technology. It blends based on students’ need and the target of the material itself. Post method pedagogy gives us challenges to create approptiate method for our class. Lecturers should help the students to success the learning process. The lecturers can used post method pedagogy in main part. In appling three parameters; particularly, possibility and practicallity based on students need.
The Strategic Development for Research Excellence in Thailand 4.0 of Postgraduate students Under Council of the Graduate Studies Administrations of Thailand (CGAT)
Authors: Raob Ismail , Abdullah Hasan Farid , Jeha Zakee 
Published: February 2021

Abstract
This paper aimed to investigate the exploratory factor analysis of research excellence in Thailand 4.0 and to develop the research strategy towards research excellence in Thailand 4.0 of postgraduate students under council of the graduate studies administrations in southernmost Thailand. The mixed method research design was applied in this study. The quantitative was initiated with exploratory factor analysis, and qualitative was used by focus group to develop the research strategy towards research excellence in Thailand 4.0. The Sample size in this study were 530 students. This paper followed factor analysis methods to set the sample. Sample size data was subject to item ratio1:10, 35 items that mean the sample were 530. Furthermore, the sample of qualitative research were 25 students. Besides, a questionnaire with five points rating scale was used to collect the data needed. For qualitative Focus Group the SWOT Analysis, Position Matrix, and TOWS matrix were used. Additionally, frequencies and exploratory factor analysis were used in the study. The data was analyzed using program R version 3.6.2. The finding found that the factor analysis for this measure yielded a seven factors solution with eigenvalues greater than 1.0. These factors were named as 1) research skill, 2) innovative thinking skill, 3) learning style skill, 4) commination skill, 5) digital skill, 6) academic writing skill, and 7) social and life skill. Furthermore, the SWOT analysis has been assessed through an analysis of strengths, weaknesses, opportunities and threats. All data will be analyzed in a matrix relationship using a table called TOWS Matrix. The TOWS Matrix is an analytical table that takes the data obtained from the analysis of SWOT to be analyzed to determine. Come out into the following types of strategies.
Developing Learning Model Based on the PMR Approach to Improve Student’s Knowledge in Mathemathics Learning
Authors: Azizah Nur , Fauzan Ahmad , Lufri  , Arnawa Made 
Published: February 2021

Abstract
There are several factors that cause the low achievement of students’ mathematics learning outcomes in several high schools in the Dharmasraya district, including: learning process plans (RPP), monotonous methods, only 15% of students who like mathematics, abstract material, lack of media, teacher’s difficulty in analogizing material into life around students or vice versa. This is a Research and Development that uses the Plomp development model, which consists of three phase the Preliminary, Prototype, and Assessment. Based on the results of this research that the learning design topic Implementation of sequences and series based on PMR approach has; The average value of HLT validity is 4.11 with a very valid category. The practical test of learning books applying PMR-based sequences and series by teachers and students is 85.02 and is classified as very practical. The average value of students’ mathematical reasoning ability tests after being tested is 76.97% and can be categorized as effective and it also can improve student’s knowledge in mathematics learning.
Computer Self Efficacy, The Availability of Information Technology Facilities, And Accounting Student Attitude
Authors: Hermawan Sigit , Biduri Sarwenda , Wahyu Ningdiyah Endra , Puspitasari Ratna 
Published: February 2021

Abstract
This study aims to analyze the influence of the availability of information technology facilities, experience, and attitudes of accounting students in using computers to computer self-efficacy (CSE). The analytical tool used is lists the questionnaire lists the SPSS 16.0, data collection in the form of test validity and reliability testing. The hypothesis of this study is that there is the influence of the availability of information technology facilities, experience, and attitudes of accounting students in using computers to computer self-efficacy (CSE). To test this hypothesis used data analysis tools such as multiple linear regression. The results showed that the availability of information technology facilities influence on computer self-efficacy (CSE), the experience effect on computer self-efficacy (CSE), and the attitudes of students in using computer effect on computer self-efficacy (CSE) and the availability of information technology facilities, experience, and attitudes affect students in using computers simultaneously on computer self-efficacy (CSE).
Integration of Distance Learning Design and e-Learning in Madrasah
Authors: Munif Muhammad , Umiarso  , Mardia  , Laili Nurul , Sa’dia Halimatus , Muhid  
Published: February 2021

Abstract
This study aims to determine the results of distance learning using e-learning, which is reviewed from a management perspective. This research uses a qualitative case study approach, with a research site at the Madrasah Aliyah Lubbul Labib Maron, Probolinggo, East Java, Indonesia. The results showed that; management of distance learning is carried out in several stages, namely; planning that includes learner analysis, determination of material, methods, approaches, media and evaluation techniques that will be used in learning activities. Furthermore, the results of the planning are implemented in online learning and evaluated according to what has been planned.
Zonal instability and wave trapping
Authors: Garbet X. , Panico O. , Varennes R. , Gillot C. , Dif-Pradalier G. , Sarazin Y. , Bourne E. , Grandgirard V. , Ghendrih P. , Zarzoso D. , Vermare L. 
Published: February 2021

Abstract
This paper presents a model for zonal flow generation based on a wave kinetic equation coupled to a poloidal momentum equation in a regime where wave trapping matters. Several models of the wave collision operator have been tested: Krook, diffusion and diffusion plus an instability growth rate. Conditions for zonal instability have been identified. It is found that a zonal instability is possible in all cases. However the force is a power law of the zonal velocity, so different from the quasi-linear case of random phases that produces a force that is linear in velocity. Also the zonal force may change sign, leading to flow radial profiles that are not sinusoidal.
Analytical method in the study of kinematics of process machinery mechanisms
Authors: Orlov B N , Karapetyan M A , Matveev A S 
Published: February 2021

Abstract
Among all technological machines and equipment, the object of the study was a drainage machine. The machine operates in particularly difficult conditions. The quality of operation depends on the maintenance of process parameters. The kinematics of a working element of the drainage machine and its suspension on the base machine significantly affect the accuracy of holding the given slope of a drain trench and slot. In recent years this issue has received considerable attention. However, the existing analytical methods for kinematic studies of drainage machine mechanisms are complex and therefore not always acceptable. The geometrical methods are used more often. The developed analytical method based on the use of complex numbers conveniently combines the analytical study of the kinematics of mechanisms with geometrical representation.
Modeling of contact interactions in lathe turning with accounts for rheology in the cutting zone
Authors: Vasilkov D V , Cherdakova V S , Bundur M S 
Published: February 2021

Abstract
This article discusses the dynamic modeling of contact interactions in the technological system of machining in the turning process based on piecewise linear approximation. A feature of the model is that it differentiates between the conditions of contact interaction between the front surface of the tool and the coming off chips, as well as between the back surface of the tool and the workpiece being processed. The consideration is based on the two-term characteristic of friction, realized in the form of a sequence of sliding and adhesion phases. In this case, the process of contact interaction in each phase is described by a set of rheological models. The phase switching conditions are determined by the rate of relative contact interactions, as well as the contact pressures between the front surface of the tool and the chips, between the back surface of the tool and the workpiece. Differentiated description of contact interactions from the front and back surfaces of the tool made it possible to build a tool for studying the processes of self-regulation of contact interactions in dynamic contours and the connectivity between them, which allows us to determine the conditions for the formation of self-oscillations that the dynamic system imposes on itself. The performed experimental studies have shown the correspondence between the nature of the movements during modeling and real cutting.
Influence of artificial filler made of calcium hydrosilicates of various basicity on the performance characteristics of non-autoclave hardened silicate materials
Authors: Volodchenko A A 
Published: February 2021

Abstract
The work established the nature of the effect of an artificial filler made of calcium hydrosilicates of various basicity on the physical and mechanical properties of non-autoclave silicate composites based on unconventional aluminosilicate raw materials, represented by clay rocks of an unfinished stage of mineral formation. It is determined that the optimal content of an artificial filler of the composition CaO:SiO2 is 1:1 in the raw mixture is in the range of 1–3 wt.%. The available interval makes it possible to vary the composition of the initial mixture and obtain products with the required properties, which is especially important when the material composition of the feedstock fluctuates, as well as in case of violation of the production technology. The rational content of the artificial filler of the composition CaO:SiO2 = 2:1 is 1 wt. %. It is shown that the addition of an artificial filler promotes the formation of a cementitious substance from neoplasms of a higher degree of crystallization, which contributes to an increase in the strength and water resistance of the material. Mathematical models are proposed for the selection and optimization of the compositions of non-autoclave silicate materials based on unconventional aluminosilicate raw materials and modified with an artificial filler represented by calcium hydrosilicates of various basicity to obtain materials with a compressive strength of 18-23 MPa with an average density of finished products of 1750-2000 kg/m3.
Theoretical and practical aspects of absorbing layers insulation in the conditions of hydraulically perfect modes of grouting solutions injection
Authors: Averyanov A P , Andreev V E , Chizhov A P , Mukhametshin V Sh , Chibisov A V 
Published: February 2021

Abstract
The article presents the results of theoretical and experimental studies of insulation of absorbing intervals during penetration of rocks. The proposed systematic approach makes it possible to effectively apply insulation methods in various mining conditions of well construction. The methods for controlling the absorption of drilling fluids in the conditions of abnormally low layer pressures are combined in a systematic technology.
Development regulation of oil and gas reservoirs based on effective geological and geophysical information
Authors: Batalov D A , Andreev V E , Mukhametshin V V , Kuleshova L S 
Published: February 2021

Abstract
The paper studies the dynamics of fracture reservoir management during the solution of the problems of the increase in the efficiency of development of oil deposits with hard-to-recover reserves. The directions of the creation of models of multichannel telemetry systems are studied from the point of view of the proposed concepts, as well as the conditions under which the study of well conditions is carried out. The results show that these telemetry systems can function in a well when the sensor elements are integrated, which are based on a single-core armored cable.
Modeling of clay acid effects on the bottomhole zone of wells
Authors: Safiullina A R , Mukhametshin V V , Kuleshova L S , Batalov D A 
Published: February 2021

Abstract
Typical wells have been identified in the conditions of the Langepass group deposits, according to which modeling of the clay-acid process on the bottom-hole formation zone has been performed. There was a significant increase in the efficiency of operations based on the use of developed models, which allows choosing the most optimal technologies and exposure parameters depending on the properties of the productive formations.
Geological and technological justification of the parameters of acid-clay treatment of wells
Authors: Gabzalilova A Kh , Batalov D A , Mukhametshin V Sh , Andreev V E 
Published: February 2021

Abstract
The article shows that modelling and design definition of the impact requires the differentiation for a specific well-formation system. The authors found that the effective use of acid-clay exposure in terrigenous strata is possible in various geological and technological conditions considering the criteria for the impact applicability and the implementation of a specific impact design. They proposed to use selective acidic solutions of selective action to increase the efficiency of secondary acid treatments.
Oil and gas well drilling technology based on the system approaches and the results of application
Authors: Gazizov R R , Chizhov A P , Andreev V E , Chibisov A V , Mukhametshin V V , Kuleshova L S 
Published: February 2021

Abstract
The article analyzes the reason and factors of declining in key indicators of quality and efficiency of well construction and operation, which have led to a long-term stagnation in drilling technology. To handle the urgent issues, a systematic approach to implement the complex of hydro-mechanical hardening of an open-hole well by the synchronous and coordinated action of hydraulic monitoring strings of drilling fluids is proposed. The indicators of quality and efficiency of the complex compared to the traditional ones, which exceed the former by two or more times, are provided.