bluuebunny/crossref_metadata_2025_split huggingface dataset:
INVESTIGATION OF PRESSING DIAGRAMS DURING MOLDING A MIXTURE OF COPPER POWDERS AND SILICON CARBIDE
Authors: Панькин Николай Александрович , Сигачев Александр Федорович , Мишкин Владимир Петрович 
Published: December 2020

Проведено исследование смеси порошков меди и карбида кремния после одностороннего холодного формования в закрытой пресс-форме методами: растровой электронной микроскопии, гидростатического взвешивания и анализа диаграмм прессования. Выявлены основные этапы формования, их границы и характерные процессы, происходящие на каждом из них. Установлено, что на диаграмме формования можно выделить не менее трёх областей. Показано, что их границы (по давлению) определяются механическими свойствами материалов используемых порошков и процессами перераспределения / укладки структурных элементов и их упругой/неупругой деформации.
A study of a mixture of copper and silicon carbide powders after one-sided cold forming in a closed mold was carried out by methods: scanning electron microscopy, hydrostatic weighing and analysis of pressing diagrams. The main stages of molding, their boundaries and characteristic processes occurring at each of them are identified. It was found that at least three areas can be distinguished on the molding diagram. It is shown that their boundaries (in terms of pressure) are determined by the mechanical properties of the materials of the powders used and the processes of redistribution / packing of structural elements and their elastic / inelastic deformation.
DESINGN OF GAS SENSOR BASED ON TIN OXIDE NANOWHISKERS
Authors: Тимошенко Дмитрий Александрович , Синёв Илья Владимирович , Симаков Вячеслав Владимирович 
Published: December 2020

Методом осаждения из паровой фазы были выращены нитевидные нанокристаллы диоксида олова. Исследовано влияние технологических параметров синтеза на морфологию выращенных наноструктур. Показано, что увеличение парциального давления кислорода в диапазоне от 0,06 мбар до 9,3 мбар и температуры зоны осаждения в диапазоне от 940 °С до 995 °С приводит к увеличению диаметра формируемых нитевидных нанокристаллов. В экспериментах установлено, что средний диаметр нитевидных нанокристаллов варьировался от 80 нм до 250 нм. На основе полученных нанокристаллов был сформирован активный слой газового сенсора, чувствительный к парам ацетона в воздухе. Величина газочувствительности и характерные времена отклика полученного сенсора достаточны для практического применения в газоанализаторах и системах распознавания газовых смесей и запахов.
Tin dioxide nanowhiskers were grown by the vapor deposition. The effect of technological parameters on the morphology of the grown nanostructures was investigated. It is shown that an increase in the partial pressure of oxygen in the range from 0,06 mbar to 9,3 mbar and the temperature of the deposition zone in the range from 940 °C to 995 °C leads to an increase in the diameter of the formed nanocrystals. Experimentally it was shown that the average diameter of nanowhiskers varied from 80 nm to 250 nm. A gas sensor was formed with an active layer, based on the nanocrystals, sensitive to acetone vapor. The value of the gas sensitivity and the characteristic times of the sensor are sufficient for practical use in gas analyzers and systems for recognizing gas mixtures and odors.
PROCESSES OF FORMATION OF NANODISPERSE ALO POWDERS WITH CARBON IN A DC ELECTRIC ARC
Authors: Алексеенко Наталья Анатольевна , Коваленко Максим Николаевич , Маркова Людмила Владимировна , Зажогин Анатолий Павлович 
Published: December 2020

Исследованы процессы образования нанодисперсных порошков AlO с углеродом в электрической дуге постоянного тока при воздействии дугового разряда между электродом из алюминиевого сплава Д16Т и угольным электродом в атмосфере воздуха. Изучено влияние силы тока дуги на плазменно-дуговой синтез алюминий-углеродного материала, прекурсора для получения полых наночастиц AlO . Установлено, что с увеличением силы тока дуги от 4 до 14 А количество продукта увеличивается почти на порядок, несмотря на конкурирующие процессы диссоциации AlO при увеличении температуры от 5000 до 5500К.
The nanodisperse AlO powders formation with carbon in a DC electric arc under the influence of an arc discharge between an D16T aluminum alloy electrode and a carbon electrode in the air atmosphere are studied. The effect of the arc current on the plasma-arc synthesis of an aluminum-carbon material, a precursor for production of hollow AlO nanoparticles, was studied. It is found that with an increase in the arc current from 4 to 14 A, the amount of product increases by almost an order of magnitude, despite competing dissociation processes with an increase in temperature from 5000 to 5500 К.
EFFECT OF METAL ADDITIVES IN HYDROCHEMICAL PROCESSING OF DIASPORE-BEMITE BAUXITE ON PHYSICOCHEMICAL PROPERTIES OF REDUCED MUDS
Authors: Бибанаева Светлана Александровна , Пасечник Лилия Александровна , Скачков Владимир Михайлович , Суриков Владимир Трофимович , Яценко Сергей Павлович 
Published: December 2020

Работа посвящена изучению высокотемпературного гидрохимического разложения минеральных комплексов диаспор-бемитовых бокситов методом Байера с извлечением макрокомпонентов - алюминия и железа в присутствии металлических восстановителей. Проведены рентгенофазовые исследования, направленные на определение состава и структуры новых соединений в магнетизированном красном шламе. По результатам физико-химических исследований продуктов выщелачивания рекомендованы оптимальные параметры восстановительного выщелачивания бокситов СУБРа, направленные на извлечение алюминия и синтез магнетита. Выявлены закономерности влияния вида металлического восстановителя на морфологию, фазовый состав, размер частиц в красном шламе (КШ).
The work is devoted to study of the high-temperature hydrochemical decomposition of mineral complexes of diaspore-bemite bauxites by the Bayer method with the extraction of macro-components-aluminum and iron in the presence of metal reducing agents. X-ray phase studies were performed to determine the composition and structure of new compounds in magnetized spent red mud. Based on the results of physical and chemical studies of leaching products, optimal parameters for reducing leaching of bauxite are recommended, aimed at extracting aluminum and synthesizing magnetite. The regularities of the influence of the type of metal reducing agent on the morphology, phase composition, and particle size in the red mud are revealed.
ELECTRON-STIMULATED DESORPTION OF POTASSIUM ATOMS ADSORBED ON THE SURFACE OF GOLD
Authors: Кузнецов Юрий Александрович , Лапушкин Михаил Николаевич 
Published: December 2020

Создан ультратонкий слой интерметаллида KAu при комнатной температуре при напылении атомов калия на слой адсорбированного золота на поверхности вольфрама. Исследованы процессы электронно-стимулированной десорбции атомов K с поверхности KAu. Найдены квазирезонансные пики в зависимости выхода ЭСД от энергии возбуждения при 64 и 82 эВ, которые соответствуют возбуждению остовных уровней Au 5р и Au 5р. Полученные результаты свидетельствуют о формировании KAu различной стехиометрии: от KAu до KAu. Показано, что интерметаллид KAu, полученный при комнатной температуре, как полученный ранее KAu при 1000K, является полупроводником. Предложена модель электронно-стимулированной десорбции атомов K в системе K/KAu/Au/W.
An ultrathin intermetallic layer KAuwas created at room temperature by depositing potassium atoms on adsorbed gold layer on the tungsten surface. The processes of electron-stimulated desorption of K atoms from the KAu surface are investigated. Quasi-resonance peaks are found in the dependence of the ESD yield on the excitation energy at 64 and 82 eV, which correspond to the excitation of the core levels Au 5p and Au 5p. The obtained results indicate the formation KAu of different stoichiometry: from KAu to KAu . It is shown that the intermetallic compound KAu created at room temperature is a semiconductor, as it was previously obtained at 1000 K. A model of electron-stimulated desorption of K atoms in the K / KAu / Au / W system is proposed.
CHEMICAL TRANSFORMATIONS OF COPOLYMERS OF ACRYLIC ACID Α-HALOID WITH N-VINYLPYRROLIDONE
Authors: Малкандуев Юсуф Ахматович , Бегиева Мадина Биляловна , Кокоева Анета Ахмедовна , Микитаев Абдулах Касбулатович , Джалилов Абдулахат Турапович 
Published: December 2020

Приведены результаты сополимеризации а - галогенов акриловой кислоты с N - винилпирролидоном в присутствии аминирующих агентов, при низких температурах в органической среде. ИК-спектры полученных сополимеров подтверждают реакцию аминирования. Исследованы зависимости приведенной вязкости водных растворов синтезированных полимеров и наблюдается «полиэлектролитное набухание». Синтезированные аминированные полимеры образовывают внутрикомплексные соединения с галогенидами двухвалентных металлов при комнатной температуре. В работе описываются первые попытки получения новых нанокомпозиционных материалов на основе синтезированных сополимеров и модифицированного монтмориллонита. Анализ литературных данных показывает, что особенности получения нанокомпозитов на основе Na - монтмориллонита и водорастворимых сополимеров ранее не изучались.
The paper presents results on copolymerization of a-halogens acrylic acid and N - vinylpyrrolidone in the presence of aminating agents at low temperatures in an organic environment. The IR spectra of the obtained copolymers confirm the amination reaction. The dependences of the reduced viscosity of synthesized polymers aqueous solutions were studied and a «polyelectrolyte swelling» was observed. The synthesized aminated polymers form internal complex compounds with divalent metal halides at room temperature. This paper describes the first attempts to obtain new nanocomposite materials based on synthesized copolymers and modified montmorillonite. Analysis of the literature data shows that the features of obtaining nanocomposites based on Na -montmorillonite and water-soluble copolymers have not been studied before.
IN MEMORY OF ROSTISLAV MIKHAILOVICH GRECHISHKIN (1941-2020)
Authors: Малышкина Ольга Витальевна 
Published: December 2020

Посвящается памяти Ростислава Михайловича Гречишкина, выдающегося советского и российского учёного-физика, специалиста в области магнитных явлений, доктора физико-математических наук, профессора кафедры прикладной физики физико-технического факультета Тверского государственного университета, руководителя научной школы по магнитоэлектронике.
This short communication is dedicated to memory of Rostislav Mikhailovich Grechishkin, an outstanding Soviet and Russian physicist, a specialist in the field of magnetic phenomena, Dr. of physical and mathematical Sciences, Professor of the Applied Physics Department at the Faculty of Physics and Technology of Tver State University, head of a scientific school in magnetoelectronics.
“Ver para prever a fim de prover”: a voz de professores rurais gaúchos nos boletins do ensino rural (década de 1950)
Authors: Manke Lisiane Sias , Kuster Weliton Barbosa 
Published: December 2020

O presente artigo tem por objetivo analisar alguns discursos de professores rurais gaúchos da década de 1950 presentes nos Boletins do Ensino Rural, que foram produzidos e publicados pela Superintendência do Ensino Rural, vinculada à Secretaria de Educação e Cultura do Rio Grande do Sul, um impresso oficial que tinha como propósito a instrução e o fortalecimento das instituições de ensino rural, voltado, especialmente, para os professores das escolas rurais. Os Boletins analisados referem-se aos números publicados nos anos de 1954, 1954/1955, 1956, 1957 e 1958. Para tanto, utilizamos como referencial teórico-metodológico os escritos de Carlos Bacellar (2005), no que tange à análise documental, e Bezera Neto (2003) e Sud Mennucci (1946), no tocante ao ruralismo pedagógico. O processo de análise documental possibilitou perceber a ação empreendida pela Superintendência do Ensino Rural para alcançar os preceitos defendidos pelo ruralismo pedagógico. Os textos produzidos por professores de escolas rurais apresentavam os problemas e as potencialidades destas comunidades, indicando práticas de ensino e postura adequadas à “missão” a ser desempenhada pelos docentes rurais.
Tabot Festival: Shi'a Tradition Within The Sunni Community Of Bengkulu City On Sociology Of Islamic Law Perspective
Authors: Fahimah Iim , Jafar Wahyu Abdul 
Published: December 2020

The purpose of this research is to describe the Tabot festival, a legacy of the Shia tradition but still exists and held continuously in the Sunni community of Bengkulu City. This festival is a manifestation of love for Sayidina Husen bin Ali from people of Bengkulu. However, even though the purpose of this Tabot is useful, there are still some people who are questioning the legality of Tabot’s law because it is strongly suspected that Shiites brought this festival to the Bengkulu. This research was held to answer the legality of Tabot’s law, which is still being disputed by the Sunni community. Through this study, the researcher explained in detail the Tabot legal issues through the sociology of Islamic law Perspective. This research is categorized as field research, and the approach used in this research is the sociology of Islamic law. Data collection techniques used were interview and documentation techniques. After an in-depth study, it was concluded that the Tabot Festival was accepted by the Sunni community, but there are a few sets of events that need to be improved, because it was considered to violate Shari'ah. The allowed event series are Duduk Penja, Meradai, Menjara/Mengandun, Arak Penja, Mengarak Penja Bersurban, Gam, and Arak Gendang. There are two series of Tabot programs that need to be improved, namely Menggambik Tanah and Tabot Tebuang.
A Study on Problems and Malpractices Emerge during Examination of Grade 5 and Grade 8 Students in Punjab
Authors: Malik Muhammad Shehzad 
Published: December 2020

Abstract Examinations are conducted under some certain rules and regulations set by exam governing bodies. According to Arijesuyo and Adeyoju (2012) credibility of examination depends upon fair and systematic conduct under proper conditions (Ray, et al, 2018). This research was designed to explore the problems and malpractices emerge during examination of grade 5 and grade 8 students in Punjab. Purposive sampling technique was used for the selection of experienced participants of the study (Creswell, 2013). Twenty-two ECC heads, who had been conducting examination were interviewed. A semi structured interview protocol was used as an instrument of the study. Thematic analysis was used for the analysis of data (Clarke and Braun, 2018). Results revealed that several problems hamper the performance of deputed staff and credibility of examination. These problems consist of malpractices, lack of resources and shortage and misprinting of papers. Moreover, improper training, less remuneration, combine and overcrowded exam centres etc. also created problems for ECC heads. It was also explored that activities of schools suffered due to engagement of teaching staff for exams.
Does Mind Mapping Technique improve Cohesion and Coherence in Composition Writing? An Experimental Study
Authors: Shah Nazir Haider 
Published: December 2020

The purpose of this study was to compare the effectiveness of the instructions, founded on mind mapping and traditional teaching techniques for cohesive and coherent teaching in the composition writing of tenth-grade students. This study used a pre-test post-test control group design. Sixty (60) junior students (30 boys and 30 girls) from two schools were randomly selected. The students in the control group were guided by traditional teaching techniques, and the students in the experimental group were guided by the technique of mind mapping. The Subject Achievement Test (SAT) was conducted as a pre-test and post-test on two groups to assess student achievement. As a result, it was discovered that there was a significant difference in the average posttest scores between the experimental group and the control group in terms of the student's Subject Achievement Test (SAT). In addition, gender has a great influence on students' writing performance. The conclusion is that mind mapping technique was more effective than traditional techniques in terms of students' achievements in composition writing. The study has the potential to pave the way for future researchers. Keywords: Mind-mapping technique, composition writing, Grammar Translation Method, Subject Achievement Test, students’ achievement
Pengembangan Kedai Rumah Madinah Dalam Menentukan Strategi Bersaing
Authors: Yosep Charles , Suci Rahayu Puji , Handini Dharmayanti Pri 
Published: December 2020

Madinah Malang in the future using the IFAS Matrix, EFAS Matrix, SWOT Matrix, I-E Matrix, SWOT Matrix and QSPM Matrix. Quantitative method. Research settings at the Madinah Malang Restaurant. The results showed that the ability of Malang Medina Restaurant Shops with IFAS and EFAS were able to exploit their weaknesses. At the decision making stage with QSPM, the alternative strategy chosen was the Market Development Strategy at the Madinah Malang Restaurant Shop. This strategy has a TAS score of 6,595. Limitations / Implications for research need to increase Promotion by utilizing existing technology through mass media such as: Instagram, Facebook, Google.
Hubungan Karakteristik Bank dengan Harga Saham
Authors: H. Mas'ud Muchlis , Anggarani Dwi , Zulkifli  
Published: December 2020

This study discusses the influence of variable bank characteristics on bank stock prices included on the Indonesia Stock Exchange (2009-2013). Regarding what is used is a data collection that is a merger between cross section data and time series from 25 banks.
The results showed that bad credit as a proxy for credit risk increased significantly to stock prices. Credit risk increases. It is proven that efficiency shows a negative and significant relationship to stock prices.
Limitations / Implications in this study are the adequacy of bank capital, profitability and income diversification ratio non-interest income (NIIR) does not affect the bank's stock price.
Mobile Interface Design to suit the Algerian Culture: First initial design
Authors: Abdesselam Brahim , SHEIKH ABDUL AZIZ MADIHAH 
Published: December 2020

The growing number on the use of mobile apps has extraordinary potential for the public transport industry. Through the use of mobile apps, may provide fast, effective and safe services to the passengers to commute to different destinations. However, the particularities of mobile applications need particular attention concerning the usability aspects, such as culture. Taxi-Inter-Wilaya is a shared-taxi service between cities in Algeria. This taxi service is estimated as one of the most beneficial ways for the Algerians to travel. However, the booking for passengers travelling to long distances of 600 KM and more, can only be made via phone calls. Consequently, passengers face various challenges in the booking process. Drivers receive calls for bookings while driving, which puts them in an illegal situation and unsafe.
To this purpose, the researcher uses the design thinking approach to propose a transport mobile application that can assist and support both taxi drivers and passengers to travel between cities suitable to the Algerian culture. The data collection method comprises a series of Interviews with both users (passengers and taxi drivers) as well as designing the several iterations of low and high-fidelity prototypes of the mobile application that is named as DJAMAAI. The prototypes were then evaluated via a series of usability testing for both groups of users. Results shows that users favour visual representations that are associated to their culture more than textual; they prefer, buttons such as icons and symbols, as well as more straightforward and minimalist user interface design. Also, symbols and hints help learnability of using the tool.
Solving Routing Problem Using Improved Camel Herds Algorithm
Authors: Ardabili Ahad Khaleghi , Ahmed Zied Othman , Layth Abbood Ali 
Published: December 2020

This paper introduces a new adaptive, distributed routing algorithm based on the Improved Camel Herds Algorithm (CHA). It is an intelligent, multi-agent optimization algorithm that is inspired by the behavior of camels and how they search for food in their desert environment. We examine its ability to solve the routing problem in switched networks: finding the shortest path in the process of transferring data packets between networks. Many meta-heuristic algorithms have been previously proposed to address the routing problem, and this proposed approach is compared with three well-known algorithms (ACO, GA, PSO) on ten graphs (weighted, integer, and not negative) and datasets with various size of nodes (from 10 nodes to 297 nodes). Three performance criteria were used to evaluate the performance of the algorithms (mean relative error, standard deviation, and number of function evaluations). The results proved that the performance of the proposed algorithm is both promising and competitive with other algorithms.
ESSENTIAL TRIGONOMETRY WITHOUT GEOMETRY PART II: GENERALIZATIONS AND APPLICATIONS
Authors: Gresham John , Wyatt Bryant , Crawford Jesse 
Published: December 2020

Abstract
In a previous paper (Gresham et al. 2019), the properties, theorems, and identities of the sine and cosine functions were developed using only analytical methods and without geometric constructions. We follow those results and use them to develop generalizations of the key theorems of trigonometry, again using purely analytical methods. We conclude with a connection to the Law of Conservation of Energy in physics.
Evaluation of physiological changes and therapeutic approaches of hypertension in pregnancy
Authors: Rahman Mohammed Safi Ur- , Sumayya  , Ayesha Naseer  , Korapati Ramarao  , Nayak P Srinivas 
Published: December 2020

There are various physiological and pharmacokinetic changes occur in pregnancy to nurture the developing foetus, avoid toxicities, resistance to infections and prepare the mother for labour and delivery. Some of these changes influence normal biochemical values while others may mimic symptoms of medical disease and alter the kinetic parameters of the drugs. It is important to differentiate between normal physiological changes and disease pathology. This article highlights the important changes that take place during normal pregnancy, development of common conditions and pharmacokinetic variations. This review also will describe basic concepts in pharmacokinetics and their clinical relevance and highlight the variations in pregnancy that may impact the pharmacokinetic properties of medications, different treatment approaches, contraindications and drugs used in pregnancy
Key words: Physiological changes in pregnancy, Hypertension, pregnancy disorders.