bluuebunny/crossref_metadata_2025_split huggingface dataset:
The relevance of flotation classification in a closed grinding cycle
Authors: Intogarova T I , Valieva O S , Morozov Y P 
Published: February 2021

Abstract
The article discusses a brief history of development of the flotation classification, reflects current trends in the development of flotation ore dressing, in foreign and domestic enrichment practice. Variants of implementation of the flotation classification, due to behavioral patterns, the degree of interaction are discussed. The relationship of flotation and gravitational processes in the flotation classification was identified and confirmed by theoretical and experimental studies. The directions of application of the flotation classification in a closed grinding cycle were considered. Variants of practical application of the flotation classification in a closed grinding cycle for sulfide ores and on tailings for various products of the grinding cycle, in the modes of froth flotation and separation were analyzed, the main advantages were identified. Ways to achieve optimal conditions for flotation classification were described. A new direction for the flotation classification using tapering chutes was identified. It is possible to obtain a conditional concentrate of flotation classification in a closed grinding cycle with the enrichment of the froth product in the tapering chutes. The flotation classification of tailings ensures the maximum extraction of flotation minerals into the froth with the tailings flotation classification being drained. A schematic diagram of flotation classification enrichment in a closed grinding cycle is presented, and the results of calculating final flotation classification parameters for sulphide copper ore dressing are presented. Flotation classifiers in a closed grinding cycle reduce energy costs and increase technological indicators of the enrichment of mineral and industrial raw materials.
Features of IR reflection spectra of β-Tl1-xCuxInS2 single crystals (0 ≤ X ≤ 0.015)
Authors: Matiyev A Kh , Uspazhiev R T , Gachaev A M , Sysoev I A , Khamkhoev B M , Matieva T Ah , Chapanov Kh S-G , Bagov A M 
Published: February 2021

Abstract
The method of long-wave spectroscopy made it possible to study the IR reflection spectra of layered single crystals β-Tl1-xCuxInS2 (0≤X≤0.015) in in the frequency range of 40-500 cm−1 and the temperature range of 84 ¸ 300 K. It was shown that partial substitution of thallium atoms with copper atoms leads to a decrease in the frequencies of the corresponding oscillations in the frequency range of 40-500 cm−1 and does not lead (at these concentrations) to local oscillations. It was found that solid solutions β-Tl1-xCuxInS2 (X=0 ÷ 0.015) exhibit the characteristic single-mode behavior. It was shown that partial substitution of thallium atoms with copper atoms in single crystals β-Tl1-xCuxInS2 (X = 0.005; 0.010; 0.015) weakens the ionic bond in Tl–S, as a result of which the frequencies of “internal” oscillations shift towards low temperatures.
Mossbauer effect in alloys of variable composition (Tb1-xYx)0.8Sm0.2Fe2
Authors: Umkhaeva Z S , Ilyushin A S , Aleroeva T A , Kiseleva T U , Tereshina I S , Pankratov N U 
Published: February 2021

Abstract
The paper presents the results of studying the Mossbauer effect on alloys of the multicomponent system (Tb1-XYX)0.8Sm0.2Fe2 (substitution parameter X = 0, 0.2, 0.4, 0.6, 0.8, 1). This system is based on the TbFe2 compound, which has a cubic crystal structure and the highest magnetostriction constants among rare-earth intermetallic compounds of the RFe2 type. Substitution of atoms magnetic terbium for weakly magnetic samarium (20%) and nonmagnetic yttrium leads to exchange interactions altering in the system which should affect the magnitude of hyperfine interactions on 57Fe nuclei in alloys of this system. The studies were carried out at room temperature. All parameters of the Mossbauer spectrum being isotropic and anisotropic hyperfine fields, quadrupole shift of the components of the spectrum hyperfine structure, and isomeric shift of the Mossbauer line have been determined. Their dependences on the concentration of yttrium have been established.
Geological and statistical modeling of oil recovery of carbonate formations
Authors: Mukhametshin V Sh , Tyncherov K T , Rakhimov N 
Published: February 2021

Abstract
For the conditions of fourteen groups of low productivity, complex features in the carbonate reservoirs of the Volga-Ural oil and gas province were constructed geological and statistical modeling that allows predicting the ultimate oil recovery factor for deposits similar to those studied when solving various development tasks. Based on the consideration of cause-and-effect relationships between geological and technological parameters, the physical interpretation of the obtained models is given. It is established that the variety of oil deposits in carbonate reservoirs according to the conditions of occurrence, geological-physical and physical-chemical properties of reservoirs and their saturating fluids requires a differentiated approach when modeling and using models of the oil recovery process.
Stoke’s theory in problem solution of cementing slurry sedimentation in horizontal sections
Authors: Kuleshova L S , Gabzalilova A Kh , Akhmetshina D I 
Published: February 2021

Abstract
The paper studies the application of Stokes theory in problem solution of cement slurry sedimentation in horizontal sections. As a rule, during the horizontal cementing of wells, due attention is paid to the composition of cement slurry. The final composition should ensure stable casing of the horizontal column - cement slurry - rock. A slight deviation in the fluid loss index can lead to a loss of contact between the cement stone and the rock. The study of the process of sedimentation of solution particles in horizontal sections is relevant. This paper assesses the application of Stokes theory in the solution of the above mentioned problem. The material described in this article will be useful during the study of this topic by students of Mining and Petroleum Faculty, the direction of drilling oil and gas wells, in order to improve the level of knowledge gained during the course of “Well casing” discipline.
On the efficiency of wastewater treatment from solid suspended particles at Tuimazaneft Oil and Gas Production Division (NGDU “Tuimazaneft”)
Authors: Mingulov Sh G , Mingulov I Sh 
Published: February 2021

Abstract
The article shows that the implementation of filters at the intake of submersible pumps along with the flushing deposits from filter elements by a reverse flow of liquid without lifting the pumping equipment is an effective means of cleaning products being extracted from the reservoir from suspended solids. The work notes a considerable experience of NGDU “Tuimazaneft” in the use of mesh filters in pressure maintenance systems. The results present the optimal parameters of the structures and sizes of filter elements, and a high technical and economic effect from their use.
Quality of Service EIGRP Routing Protocol on Campus Area Network
Authors: Antoni Musril Hari , Sri Artika Febria , Derta Sarwo , Darmawati Gusnita , Okra Riri 
Published: February 2021

Abstract
Quality of Service (QoS) is a method of measurement used to determine the capacity of a network to perform services. One of the QoS implementations is to manage the performance of routing protocol. The routing protocol is a method used to connect one router to another, to convey information correctly and to provide a guaranteed service. This study discusses the QoS of the Enhanced Interior Gateway Routing Protocol (EIGRP) applied to campus area network. EIGRP is a routing protocol which only available on Cisco routers and often refers to the proprietary protocol on Cisco. EIGRP can only be applied by Cisco routers and their fellow. Campus area network is an interconnection of computer networks within the campus area. Data exchange on campus network should be undertaken quickly and precisely to facilitate campus operations. The method used in this study was Network Development Life Cycle (NDLC) which consisted of several phases, namely analysis, design, simulation prototyping, implementation, monitoring, and management. The results of this study provided QoS with a throughput value of 77 bps, 0.53 percent of the packet loss value, 1.89 ms of latency, and 1.87 ms of jitter value. This indicates that the EIGRP routing protocol has a strong QoS value to be applied to campus area networks.
Use of the C4.5 Algorithm in Determining Scholarship Recipients
Authors: Novita Rina , Zakir Supratman , Nur Khomarudin Agus , Maiyana Efmi , Hasyim Hamimah 
Published: February 2021

Abstract
The importance of education is increasingly felt by the community. Various attempts were made by parents to continue education for their children. This is in line with the government’s efforts to equalize education. Currently, there are quite a lot of scholarships provided by the government in developing education. One of these scholarships is the Bidik Misi Scholarship. This scholarship is in great demand by prospective students because the period for giving is 4 years and is given every semester. Every year the number of applicants for this scholarship continues to grow. The process of selecting scholarship recipients is getting more complicated due to a large number of candidates for scholarship recipients. The purpose of this research is to develop a system that can assist in selecting prospective scholarship recipients. The method used is Research and Development (RnD) with 4D (Define, Design, Develop, and Disseminate). The system development takes advantage of data mining in classifying the pile of scholarship applicant data using the C4.5 algorithm. The result of the product test shows that the value of the test of vitality is 0.91 which means valid, the practicality test is 0.89 which means that it is practical and the value of the effectiveness test is 0.93 which means that it is effective. These results are shown by the research results obtained from 7 rules with an accuracy rate of 72.5%.
Virtual Multimedia Communication for Physical Distancing in Physical Education
Authors: Adi S , Aldapit Eki , Nova Andi , Dharmika Nugraha Pratama , Hutomo Bhakti Yopi , Bang Redy Utama Made 
Published: February 2021

Abstract
Education is a sector that needs to go on to operate countinously as a means of student’s activity and development in covid-19 pandemic. Multimedia is the best solution for managing PE class not to stop despite the social distancing issue. The aduance of technology in digitalization era isn’t an obstacle to on going learning activities. Advance multimedia facility could surely be able to answer the problem arising in the society related to physical activity carried out as a form of learning. The efectiveness of multimedia learning can be seen from its trancendency to attract student’s attention and interest as it combines the views, sound, and movement. So that learning takes place attractively and easily remembered by the students.
Development Learning Media Based Android for English Subjects
Authors: Kuswanto Joko , Yunarti Yelmi , Lastri Neti , Dapiokta Jum , Adesti Anita 
Published: February 2021

Abstract
This study aims to develop android-based learning media on the subjects of english class IX. The research method used is research development with stages of designing, production, evaluation. The results of this study indicate that the android-based learning media developed on the subjects of english class IX is feasible for use in learning by teachers and students. Based on different stages the trial was being done to experts: media experts 78,3, the design 78, and the matter 80. So the percentage of overall value on the validation experts have eligibility criteria good. To scale one-to-one 80, small group 80,05 and field test 80,5. In addition, students also commented that the android-based learning media are good, varied, interesting and fun. From the results of the data analysis, it can be concluded that the android-based learning media on the subjects of english Class IX are good and can be used in the learning process.
Analysis of Online Learning Activities During the COVID-19 Pandemic at Sulthan Thaha Saifuddin State Islamic University of Jambi
Authors: Buska Wahyudi , Munthalib S.M. , Nurhasnah  , Elwidah Minah , Prihartini Yogia 
Published: February 2021

Abstract
This study aims to obtain objective information about the online learning activities of students of the Islamic Civilization and Humanities Faculty of the Sulthan Thaha Saifuddin State Islamic University of Jambi as implementing the rector’s instructions to carry out the learning process at home during the COVID-19 emergency response period. The research method used is descriptive method with survey research. Data collection techniques used are in direct communication techniques with data collection tools through questionnaires using Google Form media. Respondents in this study amounted to 280 students from the Arabic Language and Literature Department, English Literatures, Library Science, and Islamic Civilization History of the Islamic Civilization and Humanities Faculty of the Sulthan Thaha Saifuddin State Islamic University of Jambi. The results obtained from this study indicate that online learning activities of students during the COVID-19 emergency response to home study policies were “quite good”. With the force majeure situation and with all the challenges and obstacles that are expected in the future can be used as an evaluation and experience in online learning both for students and lecturers.
A Utilization of Information Technology on Education in Indonesia (2017-2020): A Systematic Literature Review
Authors: Wahyu Widodo Arif , Solikhatun Ismi , Raharja Setya , Abdun Salam Ahmad , Sri Wartini Florentina 
Published: February 2021

Abstract
This research aims to demonstrate a theoretical review of information technology used on education in Indonesia in since 2017 to 2020 and review the areas that have been researched to give an overview of the potential subsequent studies. areas of study that have been researched to give an overview of the potential subsequent studies. This study used a qualitative methods of systematic literature review of Denyer and Tranfield models which is divided into 5 systematic steps. From the documents found, demonstrated that the utilization of information technology in the field of education in Indonesia throughout the year 2017-2020 has experienced a surge in innovation in the field of development of learning media and education governance facilities. These developments are mostly solutions to solve contextual problems in research approach, dominance of development and survey is inversely proportional to the case study method, action research phenomenology, and evaluation. In the research object, policy evaluation sector, learning evaluation, and quality assurance have not been lifted as a research object. These sectors have the potential to be objects in future research.
Optimization of Personal Website: Solution for Learning in The New Normal Era
Authors: Lubis Mukhlis , Depalina Siregar Syamsiah , Kasman  , Rukiah  , Afridah  
Published: February 2021

Abstract
The education sector is one of the sectors most affected by the spread of the Covid-19 pandemic. Lecturers must ensure that teaching and learning activities continue even though students are at home. Learning innovation in the era of the industrial revolution 4.0 is a solution that needs to be designed and implemented by lecturers by maximizing existing media such as websites. Optimizing the Lecturer Personal Website is a learning model solution that can be used to deal with the current New Normal Era, especially in the field of education. The learning model through lecturer personal websites aims to optimize the role and function of the website and get added value or benefits that students get from using the Web (E-Learning). This research was conducted at STAIN Mandailing Natal using qualitative descriptive methods. The research data were obtained through recorded interviews with 8 informants, classroom observation, documentation, and literature study. This study used the interactive model data analysis technique of Miles and Huberman. The results showed that the personal role of the lecturer website was as a facility to support the quality of Islamic Law learning at STAIN Mandailing Natal. It has function as means of accessing E-Learning that is easier, more cost-effective, attractive and interactive and serves as a discussion tool for students. Students are more enjoy and full spirit in the learning process because they are cover in getting information and learning materials needed in learning Islamic Law.
Utilization of Information Technology Media and Communication in Distance Learning During the Covid 19 Pandemic
Authors: Januar  , Rahmi Alfi , Andryadi  , Hadini  , Yudelnilastia  
Published: February 2021

AbstractThe Covid 19 pandemic has had an impact on various life settings. One of them is in educational institutions. The application of New Normal with its social distancing has made learning carried out remotely. The implementation of distance learning in schools needs an innovation through the use of Information and Communication Technology in learning. There are several Information and Communication Technology media that can be used in learning including computers and the internet. Teachers can design subject matter using computers. Then the material that has been designed is delivered to students via the internet network. Currently, there are many social media that support distance learning. SDIT Cahaya Hati has also conducted distance learning. Teachers need to prepare distance learning material in advance before it is delivered to students. This study aims to reveal the use of Information and Communication Technology by SDIT Cahaya Hati teachers in distance learning during the COVID-19 pandemic. The type of this research is qualitative with interview data collection techniques, and documentation. The results show that the Cahaya Hati SDIT teachers have organized distance learning using Information and Communication Technology media. SDIT Cahaya Hati teachers use computers to make learning materials in the form of power points and learning videos. This material is delivered to students using the internet network through a WhatsApp group. Every day the teacher evaluates the learning and once a week the assignment is handed over to the teacher at school
Development of Smart Play Wheel Learning Media to Improve Student Learning Outcomes in Islamic Elementary schools
Authors: Udin By Arifin Moch. Bahak , Nurdyansyah  , Rindaningsih Ida , Kalimah Siti 
Published: February 2021

Abstract
This research is motivated by a phenomenon that occurs in the learning outcomes of students of class 3 semester one at Islamic Primary School Nurul Huda Ngampelsari Sidoarjo. Learning outcomes show does not meet the minimum completeness criteria with a p-value of 75 in the material of faith in the angel lessons Aqeedah Morals. This research and development aim to produce learning media for the spinning of the smart wheel in learning the morality of Aqidah’s material religion in the angels of God. This type of research is a type of research and development. The development model used by researchers is the Borg and Gall development model with nine stages of learning design. The results of the development of smart spinning wheel learning media meet the criteria with the results of content expert validation reaching 100%. The validation results of the design experts reached 100%. The results of individual trials reached 100%. The results of small group trials were 83%. The results of a large group trial reached 94.67%, the results of t-test analysis with a significance level of 0.05 indicate the p-velocity value of the t-test statistic was 0.00 <0.05, it can be concluded that Ho was rejected and Ha was accepted. This shows that there is a significant effect on the pre-test and post-test mean values. The conclusion is the smart wheel learning media that was developed effectively in improving student learning outcomes for 3rd semester one students at Islamic Primary School Nurul Huda Ngampelsari Sidoarjo.
VCD Development of Innovative Character-Based Learning Models as Learning Media in Learning Strategy Courses
Authors: Rahayu S , Mertha I G , Hadi K A , Gunawan G , Hikmawati H 
Published: February 2021

AbstractThis research aims to develop VCD media on character-based innovative learning models. The type of this research is the study of R & D with Four-D). The analysis of the data used to develop the models of learning and development within the VCD pieces is using the sheet media expert assessment and experts’ and students’ responses. Based on the evaluation through questionnaires by material experts showed 87.0% for character-based PBL Learning plan and got 85.9% for Cooperative Learning Model type TS-TS, both including its category Neither instrument of Lesson Plan. Results of the validation study model VCD by a media expert with the details of the quantitative results are obtained to have an average percentage of 84.70% for VCD character-based PBL learning model and 88.2% for the type of cooperative learning model TS-TS. From these results, it can be concluded that the media VCD learning model being developed has fulfilled the good criterion. Meanwhile, based on student questionnaires obtained quantitative data has a percentage of 80.60% for VCD on character-based PBL learning model and 84.7% for the type of cooperative learning model TS-TS. Therefore, it can be concluded that the developed media is already categorized to be good.
The Website-based Information Literacy system and Application in Education Facing the Age of Industrial Revolution 4.0”
Authors: Istikomah  , Puji Astutik Anita , Jannah Miftahol 
Published: February 2021

Abstract
This article discusses about the importance of web-based information literacy systems in the era of the industrial revolution 4.0. This era was built on the integration of intellectual (artificial intelligence) with the physical world by opening unlimited space and opportunities for humans to access information and interact virtually fast and easily and very low cost. Therefore, the industrial revolution 4.0 is perceived as a new age that will open opportunities as well as challenges for human life, including for education. In facing this era, high intelligence is needed to explore educational resources and to apply technology that is relevant to the evolving virtual reality. This web-based education information literacy system is one solution to facilitate students in obtaining, designing and processing knowledge and skills needed in their future lives. Education managers must innovate and utilize this system by continuously updating the latest so that the outputs and outcomes of education will be ready to face the rapidly advancing technological developments. Education is not only maintaining and preserving the tradition (culture) of society about learning but it is carving and engineering the future of the young generation in the face of global world competition that continues to roll without any time and space limits.