bluuebunny/crossref_metadata_2025_split huggingface dataset:
TRIBOCHEMICAL REACTIONS OCCURING DURING FRICTION OF COMPOSITES BASED ON PTFE FILLED WITH LAYERED SILICATES
Authors: Капитонова Ю.В. , Тарасова П.Н. , Охлопкова А.А. , Лазарева Н.Н. 
Published: June 2024

В статье описаны процессы, протекающие на поверхности трения полимерных композиционных материалов (ПКМ) на основе политетрафторэтилена (ПТФЭ) и слоистых силикатов (СС). Проведенные исследования с использованием инфракрасной спектроскопии и рентгеновской фотоэлектронной спектроскопии свидетельствуют о протекании трибоокислительных процессов в зоне контакта полимер/металл. Исследование элементного состава поверхности трения методом энергодисперсионного анализа зафиксировало появление новых пиков, соответствующих Fe и Cr. Данный факт свидетельствует о взаимодействии металла контртела с полимером в процессе трения. По результатам рентгеновской фотоэлектронной спектроскопии зафиксировано протекание реакций дефторирования и гидроксилирования макромолекул ПТФЭ на поверхности трения ПКМ. Предложен возможный механизм протекания трибохимических процессов, которые протекают на поверхности трения композитов. Установлено, что вследствие трибохимических реакций на поверхности трения образуется защитный слой, состоящий из частиц наполнителей и продуктов трибодеструкции. Таким образом, основным фактором повышения износостойкости ПКМ на основе ПТФЭ является формирование на поверхности трения вторичных новых структур в зоне трения.
The article describes the processes occurring on the friction surface of polymer composite materials (PCM) based on polytetrafluoroethylene (PTFE) and layered silicates (LS). The studies carried out using infrared spectroscopy and X-ray photoelectron spectroscopy indicate the occurrence of tribo-oxidative processes in the polymer/metal contact zone. The study of the elemental composition of the friction surface using energy-dispersive analysis recorded the appearance of new peaks corresponding to Fe and Cr. This fact indicates the interaction of the counterbody metal with the polymer during friction. Based on the results of X-ray photoelectron spectroscopy, the occurrence of defluorination and hydroxylation reactions of PTFE macromolecules on the friction surface of the PCM was recorded. A possible mechanism for the occurrence of tribochemical processes that occur on the friction surface of composites is proposed. It has been established that, as a result of tribochemical reactions, a protective layer is formed on the friction surface, consisting of filler particles and tribodestruction products. Thus, the main factor in increasing the wear resistance of PTFE-based PCM is the formation of new secondary structures on the friction surface in the friction zone.
NUMERICAL SIMULATION OF TWO-DIMENSIONAL FLOW OF A VISCOUS INCOMPRESSIBLE FLUID FILM BETWEEN ROTATING CYLINDERS WITH FORMATION OF DUSTING
Authors: Варепо Л.Г. , Паничкин А.В. , Трапезникова О.В. 
Published: June 2024

Пыление является проблемой протекания пленки вязкой несжимаемой жидкости между вращающимися цилиндрами различных технических узлов. Она свойственна также различным технологическим процессам, вызывает решение как экологических, так и технологических задач. Определить количество вязкой несжимаемой жидкости, которое выпадает на долю пыления в реальных производственных условиях, очень сложно. В работе представлен подход к оценке этого параметра для его прогнозирования и контроля на основе численного моделирования. Численный алгоритм расчета течения вязкой жидкости в двухмерных областях реализован на основе применения конечно-разностных схем, аппроксимирующих уравнения Навье-Стокса в полярной системе координат на регулярных сетках с расчетом по ним подвижных твердых границ и свободных границ жидкости.
Dusting is a problem of the flow of a film of a viscous incompressible liquid between rotating cylinders of various technical units. It is also characteristic of various technological processes, causes the solution of both environmental and technological problems. It is very difficult to determine the amount of a viscous incompressible liquid that falls to the share of dusting in real production conditions. The paper presents an approach to estimating this parameter based on numerical simulation. The numerical algorithm for calculating the flow of a viscous fluid in two-dimensional regions is implemented on the basis of the use of finite-difference schemes that approximate the Navier-Stokes equations in a polar coordinate system on regular grids with the calculation of moving solid boundaries and free fluid boundaries.
CALCULATION OF DEFORMATION OF THE WALLS OF FIRE PRESSURE HOSES UNDER INTERNAL WATER PRESSURE
Authors: Малый В.П. , Лунев А.С. , Карнаухов И.В. , Кайзер Ю.Ф. 
Published: June 2024

В статье приведены теоретические основы расчета кольцевой, радиальной и продольной деформаций стенок рукавов пожарных напорных (РПН) под действием внутреннего давления воды. Разработана графическая и математическая модели деформируемого объекта. На основе этих моделей при различных степенях упрощений выполнены аналитические расчеты каждого вида деформаций, проведен сравнительный анализ их вклада в механическую нагрузку стенок рукавов пожарных напорных (РПН), позволяющих определить места максимальной деформационной нагрузки. Проанализировано влияние деформаций на гидравлическое сопротивление РПН, отвечающее за тактику боевого развертывания сил и средств обеспечения надёжного пожаротушения. Представлены первые результаты измерения вышеуказанных деформаций и изменений гидравлических сопротивлений, полученные на авторской экспериментально-исследовательской установке «ЭИУ «ПОЛИГОН-НРС-СПСА», показавших правильность полученных расчетных соотношений.
The article presents theoretical bases for calculation of annular, radial and longitudinal deformations of walls of fire pressure hoses (RPN) under action of internal water pressure. Graphic and mathematical models of the deformed object have been developed. On the basis of these models, at various degrees of simplification, analytical calculations of each type of deformation were performed, a comparative analysis of their contribution to the mechanical load of the walls of fire pressure hoses (OLTC) was carried out, allowing to determine the places of maximum deformation load. The effect of deformations on the hydraulic resistance of the OLTC, which is responsible for the tactics of combat deployment of forces and means to ensure reliable fire extinguishing, was analyzed. The first results of measurement of the above deformations and changes in hydraulic resistance, obtained at the author's experimental research installation "EIU" POLYGON-LDC-SPSA, "which showed the correctness of the obtained design ratios, are presented.
DEVELOPMENT OF EXPERIMENTAL RESEARCH UNIT "DEFORM-RPN" FOR STUDY OF DEFORMATION OF FIRE HOSE WALLS UNDER INTERNAL PRESSURE
Authors: Малый В.П. , Куртов С.О. , Лунев А.С. , Карнаухов И.В. , Кайзер Ю.Ф. 
Published: June 2024

В статье приведено обоснование состава и описаны особенности созданной авторами экспериментально-исследовательской Установки «ДЕФОРМ-РПН», предназначенной для проведения измерения кольцевой, радиальной и продольной деформации стенок РПН при нагружении внутренним давлением. Показаны примеры практического использования ЭИУ «ДЕФОРМ-РПН» по назначению.
The article provides a justification for the composition and describes the features of the DEFORM-OLTC experimental research installation created by the authors, designed to measure all types of deformation of the OLTC walls under loading with internal pressure. Examples of practical use of DEFORM-RPN EIU for their intended purpose are shown.
PENGARUH PROFITABILITAS, LIKUIDITAS, AKTIVITAS, STRUKTUR MODAL DAN KEBIJAKAN DIVIDEN TERHADAP NILAI PERUSAHAAN (STUDI PADA PERUSAHAAN ENERGI YANG TERDAFTAR DI BEI PERIODE 2018-2022)
Authors: Gusti Ayu Ratih Hapsari 
Published: June 2024

Tujuan penelitian ini untuk menganalisis pengaruh rasio profitabilitas, likuiditas, aktivitas, struktur modal dan kebijakan dividen yang diproksikan oleh ROE, CR, TATO, LTDER dan DPR terhadap Nilai Perusahaan proksi PBV secara parsial pada perusahaan sektor energi yang listing di Bursa Efek Indonesia 2018-2022. Asosiatif kuantitatif merupakan jenis penelitian ini, sedangkan data yang dikumpulkan menggunakan metode sampel survey sera teknik studi dokumentasi. Jenis dan sumber data yaitu sekunder yang diperoleh dari Kantor Perwakilan Bursa Efek Indonesia NTB dan situs web perusahaan energi yang terkait. Dari 80 perusahaan, terdapat 13 sampel perusahaan yang memenuhi kriteria purposive sampling. Menggunakan metode regresi linier berganda melalui aplikasi SPSS. Hasil penelitian menggunakan Uji-T menunjukkan Profitabilitas berpengaruh positif dan signifikan terhadap Nilai Perusahaan. Likuditas dan Struktur Modal berpengaruh negatif dan signifikan terhadap Nilai Perusahaan. Sedangkan Rasio Aktivitas dan Kebijakan Dividen berpengaruh positif dan tidak signifikan terhadap Nilai Perusahaan.
Correlation Studies: The Relationship of Metacognitive Skills and Cognitive Learning Outcomes
Authors: Kusuma Anindita SHM , Busyairi Ahmad 
Published: June 2024

Learning basic natural sciences is not only about understanding the universe, but also about developing the trained, critical and analytical thinking needed to succeed in various life contexts. Material in basic natural science learning often involves understanding complex concepts and abstract thought processes, so good metacognitive skills are needed in students. Well-developed metacognitive skills are very important so that students can understand basic concepts and principles well so that they are expected to have a significant correlation with student cognitive learning outcomes. The research uses correlational research methods. The variable relationship that will be looked at in the research is the relationship between metacognitive skills and students' cognitive learning outcomes in learning using the Reading Concept Mapping-Student Team Achievement Division (Remap-STAD) model. The subjects in this research were students who were taking basic natural science courses. Metacognitive skills are measured using an achievement test integrated with cognitive learning outcomes questions. The data analysis used in the research is correlation analysis and regression analysis. The research results show that there is a relationship between metacognitive skills and students' cognitive learning outcomes in learning using the Reading Concept-Student Team Achievement Divisions (ReMap-STAD) model. The correlation coefficient (r) value of metacognitive skills with cognitive learning outcomes is 0.945 (very high). The direction of the relationship between metacognitive skills and cognitive learning outcomes is a positive relationship. The coefficient of determination (r2) is 0.893, so it can be explained that the variability in students' cognitive learning outcomes is determined by 89.3% by metacognitive skills. The regression significance value proves that the regression line equation can be used for predictions. The regression line equation for the relationship between metacognitive skills and cognitive learning outcomes using the Reading Concept-Student Team Achievement Divisions (ReMap-STAD) model is =1.246+1.058X.
La frontera Colombo-Venezolana: una sola región en una encrucijada entre dos estados
Authors: Jiménez Aguilar Carlos Manuel 
Published: June 2024

El trabajo aborda el problema de la percepción de las tensiones diplomáticas colombo-venezolanas de 2005-2008 por los actores comerciales de la frontera común y sus respuestas a ellas. Este problema se investiga a través de entrevistas realizadas entre julio y agosto de 2008 a un grupo de actores en las ciudades de Cúcuta, Ureña y San Antonio: Empresarios, gerentes, directores de cámara de comercio, administradores de aduana y al presidente de cámara internacional de transporte del área.
From wallets to screens: Exploring the determinants of QRIS payment adoption among Millennials in Eastern Indonesia
Authors: Tatian Calysta Tartila , Nurabiah  , Ridhawati Rini , Thao Hoang Thi Phuong 
Published: June 2024

In response to the global challenges and the demands of the digital revolution, Bank Indonesia launched the Quick Response Code Indonesian Standard (QRIS), a unified payment system designed to enhance convenience and security. Despite these potential benefits, the adoption rate of QRIS has been relatively slow. This study aims to understand the factors driving the adoption of QRIS among Millennials in Eastern Indonesia by examining how attitudes, subjective norms, and perceived behavioral control affect their intention to use QRIS. Using a quantitative approach and Partial Least Squares Structural Equation Modeling (PLS-SEM), we analyzed data from 505 respondents. The findings reveal that attitudes, subjective norms, and perceived behavioral control significantly impact Eastern Indonesian Millennials intention to adopt QRIS. Interestingly, even though Eastern Indonesia is known for its inadequate digital infrastructure and low digital literacy, these internal behavioral factors are remarkably positive. This indicates that the low penetration of QRIS in the region is mostly due to external factors rather than individual behavioral tendencies.
PENYULUHAN DAN DETEKSI DINI KANKER MULUT RAHIM DENGAN IVA TEST DI KELURAHAN BINTORO KABUPATEN JEMBER
Authors: Sugijati Sugijati , Kiswati Kiswati , Susilawati Susilawati 
Published: June 2024

Pengabdian masyarakat ini berjudul “Penyuluhan dan Deteksi Dini Kanker Mulut Rahim dengan IVA Test di Kelurahan Bintoro Kabupaten Jember ”. Pengabdian masyarakat ini berfokus pada kesehatan reproduksi pada wanita usia subur karena pada usia tersebut rentan terhadap berbagai permasalahan tentang kesehatan reproduksi. Salah satu kejadian yang paling sering dijumpai pada wanita usia subur adalah penyakit kanker mulut rahim sehingga perlu adanya peningkatan informasi mengenai kanker mulut rahim dan cara melakukan deteksi dini terhadap kanker mulut rahim. Di wilayah Kelurahan Bintoro Kabupaten Jember pada saat ada program pemeriksaan kesehatan reproduksi bagi wanita usia subur yang diadakan oleh bidan Puskesmas, dari sekitar 20 ibu wanita usia subur tidak ada ibu yang pernah melakukan pemeriksaan kanker mulut rahim dikarenakan kurangnya wawasan ibu tentang kesehatan reproduksi dan pencegahan kanker mulut rahim. Tujuan dari pengabdian masyarakat ini untuk meningkatkan pengetahuan ibu wanita usia subur tentang kanker mulut rahim, setelah adanya peningkatan pengetahuan tentang kanker mulut rahim diharapkan ibu wanita usia subur tersebut lebih dapat menjaga kesehatan reproduksi dan meningkatkan kesadaran ibu wanita usia subur untuk melakukan deteksi dini kanker serviks salah satunya dengan melakukan IVA Test, karena IVA Test merupakan salah satu pendeteksi atau screening kanker serviks yang paling sederhana dan paling terjangkau, dan dapat dilakukan ditingkat pelayanan kesehatan pratama (Bidan Praktik Mandiri), jadi tidak harus ke rumah sakit. Dari hasil evaluasi pemberian pendidikan kesehatan atau penyuluhan tentang kanker mulut rahim, sebelum diberikan penyuluhan sebagian besar ibu belum mengetahui tentang kanker mulut rahim termasuk cara deteksi dini kanker mulut rahim, hanya 25% ibu yang mengerti tentang kanker mulut rahim. Setelah dilakukan pendidikan kesehatan atau penyuluhan tentang kanker mulut rahim, 95% ibu mengerti dan sepakat untuk melakukan pemeriksaan kanker serviks dengan metode IVA Test secara rutin di wilayah tempat tinggalnya
Пам’ятки буго-дністровської та трипільської культури у науковій спадщині П. І. Хавлюка
Authors: Ленчук Дмитро 
Published: June 2024

The purpose of the article is to generalize and evaluate the scientific conclusions of P. I. Havlyuk about the development of archaeological cultures of the Neolithic (Bugo-Dniester) and Eneolithic (Trypil) eras. The research methodology is represented by: the principle of historicism, the systemic approach, the methods of logic and grouping, the comparative-historical and problem-chronological principle. The scientific novelty of the work lies in the fact that the article summarizes P. I. Havlyuk conclusions about early agricultural archaeological cultures in the Eastern Podil, as well as their assessment by other archaeologists. To write the article, unpublished manuscripts from the personal fund of P. I. Havlyuk, stored in the Vinnytsya Regional Museum of History and Nature and archaeological research reports from the Scientific Archive of the Institute of Archeology of the National Academy of Sciences of Ukraine were used. The point of view of P. I. Havlyuk about the peculiarities of the material culture of the population during the Neolithic and Eneolithic eras in the Middle Pobuzhzhia is presented. The following issues were considered: topography of settlements (planning features), characteristics of housing construction, economic activity (agriculture and animal husbandry) and crafts (pottery, weaving and tool making). The article also mentions the settlements of the Bugo-Dniester culture discovered by the archaeologist (Glynishche, Glynske I, Ladyzhyn I, Ladyzhyn II, Samchintsi, Skibyntsi, Sokiltsi, Trostyanets) and Trypil culture (Borysivka, Velyki Yaruzhki, Verbivka I, Verbivka II, Gunchanske, Ivanky, Klishchiv, Pechera, Rakhnianske, Soroka, Ulanivka, Chortorija). They are chronologically systematized and a scientific interpretation is presented. Conclusions. The archaeologist was the first in Vinnytsia to start a systematic study of Neolithic monuments. He managed to find out the peculiarities of material culture and present his own interpretation of the development of the population of that time. The discussion about the published conclusions of P. I. Havlyuk continues.
Urgency of E-Commerce Act for Consumer Protection (Comparative Study in Indonesia, Singapore, and China)
Authors: Cahyaningsih Diana Tantri , Kharisma Dona Budi , Agnjana Goldwina Aphroditerri 
Published: June 2024

<p>This research aims to discover the problems of regulation of electronic commerce (e-commerce) in Indonesia, Singapore, and China with a focus on Indonesia. This study also intends to construct e-commerce legislation to promote the expansion of the digital economy in many nations. This study focuses on legal research. Comparative and legal approaches are utilized in the study process. The legal documents utilized are e-commerce laws in Indonesia, Singapore, and China. In pandemic era, Indonesian e-commerce transactions had climbed by 50.8% with transactions reaching IDR 401 trillion. However, fraud in online transactions is one of the most reported crimes. As many as 28.7% of cybercrimes originate from fraud. The number of fraud cases, transaction security, and weak protection of personal data consumers are still central issues. The Information and Electronic Transactions Act, as revised by Act Number 19/2016 does not explicitly regulate e-commerce. Compared to Singapore, it has a Casetrust to increase consumer confidence and is supported by the Electronic Transactions Act (ETA). Personal Data Protection Act 2012 (PDPA). E-commerce Act of the People’s Republic of China is supported by Personal Information Protection Act of the People's Republic of China. The Act aims to give some legal certainty and predictability to online businesses.</p>
The Legal, Economic, and Social Vulnerabilities Experienced by Seasonal Mexican Agricultural Workers Before and During COVID-19
Authors: Goolab Nadira 
Published: June 2024

<p>This MRP explores the interconnected legal, economic, and social vulnerabilities faced by Mexican Seasonal Agricultural Workers in Canada, before and during the COVID-19 pandemic. Using a systematic literature review and two interviews with migrant organizations, this paper explores how the policies of the SAWP foster these vulnerabilities. While providing workers with access to P.R. would be helpful, using labour market segmentation theory, the discussion section of this paper explores how the reconstruction of the agricultural sector has grown in its reliance on temporary migrant labour to enhance labour productivity. As a result, these factors have created legal, economic, and social vulnerabilities for Mexican SAWP workers. KEYWORDS: </p>
Impact of Audit Market Concentration and Auditor Attributes on Audit Quality of Consumer Goods Firms in Nigeria
Authors: Tahir Muhammad Isah , Shaibu Alhassan Abdulkarim , Emmanuel Oyedokun Godwin 
Published: June 2024

This study investigated the relationship between audit market concentration, auditor attributes, and audit quality of quoted consumer goods firms in Nigeria. A purposive sampling technique was used to select five (5) quoted consumer goods firms that consistently published their annual reports from 2012 to 2020. Secondary data were sourced from annual reports of the selected quoted consumer goods in Nigeria. Data collected were analyzed using the pooled regression least square estimation technique. The result of the study revealed that audit market concentration exerts a positive and significant effect on the audit quality of quoted consumer goods firms in Nigeria. The result also indicates that the auditor’s independence positively and significantly impacts audit quality. In contrast, the auditor’s tenure has an insignificant positive effect on the audit quality of quoted consumer goods firms in Nigeria. Based on these findings, this study concludes that audit market concentration and auditor attributes improve audit quality of consumer goods firms in Nigeria. The study, therefore, recommends that firms ensure frequent auditor rotation to limit the chances of auditor-client over-familiarity which will jeopardize independence and reduce audit quality.
QUANDO A IGREJA SE REÚNE EM CASA: A COMPREENSÃO DO ESPAÇO SAGRADO DAS IGREJAS EM LARES
Authors: SANTOS FILHO CHRISTOVAM REIS DOS 
Published: June 2024

Por meio dos estudos da geografia cultural que trata dos fenômenos espaciais pela apreensão dos significados, propomos fazer uma análise da religião. A discussão que se insere articula uma interpretação entre o espaço sagrado e as igrejas em lares, grupos que não utilizam locais previamente construídos para prática religiosa, mas antes adotam os lares como pontos de encontro e as assembleias se constituem essenciais para a fluência do sagrado. Nosso objetivo é a apreensão teórica da manifestação do sagrado em uma espacialidade vivida pelas as igrejas em lares. Tomamos como abordagem metodológica um olhar interpretativo de textos expoentes sobre o tema, bem como documentos elaborados por pessoas que defendem tal modo de vivenciar o sagrado. Assim, entendemos que estes grupos possuem um discurso de divergência acerca do espaço sagrado em relação às instituições tradicionais, pois aquelas não adotam o tripé denominacional utilizadas por estas, uma vez que combatem o uso de templos, de sacerdotes religiosos e de dízimos em suas práticas cristãs. Desse modo, o espaço sagrado das igrejas em lares adota uma sacralidade fluida, advinda da efemeridade dos encontros em grupo. Palavras-chave: Espaço sagrado. Igrejas em lares. Tripé denominacional.