bluuebunny/crossref_metadata_2025_split huggingface dataset:
АВТОМАТИЗАЦИЯ УСТРОЙСТВА ДЛЯ ТРИБОТЕХНИЧЕСКИХ ИСПЫТАНИЙ ПАР ТРЕНИЯ
Authors: С.В. Пьянзов , П.А. Ионов , А.М. Земсков , С.В. Червяков 
Published: November 2024

Изложены основные принципы, подходы к автоматизации процесса триботехнических испытаний. Предложен и спроектирован опытный образец устройства для проведения испытаний пар трения в режиме реального времени. Представлены результаты триботехнических испытаний ресурсолимитирующего соединения гидростатической трансмиссии при оптимальной и расчетной нагрузках.
The basic principles and approaches to the automation of the tribotechnical testing process are outlined. A prototype device for testing friction pairs in real time has been proposed and designed. The results of tribotechnical tests of the resource-limiting connection of the hydrostatic transmission at optimal and design loads are presented.
О ВЛИЯНИИ ГЕОМЕТРИИ ПОВЕРХНОСТИ КАТАНИЯ КОЛЕС НА ПРОДОЛЬНУЮ ДИНАМИКУ ПОЕЗДА
Authors: В.П. Червинский 
Published: November 2024

Изложен метод расчета усилий междувагонных сцепок, включающий компоненты сил, обусловленных отличием геометрии поверхностей катания колес от кругового конуса, возникающей вследствие износа колес. Износ колес сопровождается появлением дополнительных сил инерции, влияющих на характер качения колеса и силы контактного взаимодействия колес с рельсами, также входящих в расчет усилий в сцепах, формирующих продольную динамику поезда. Учитывается зависимость сил от вертикальных неровностей пути.
A method is presented for calculating the forces of inter-car couplers, which includes components of forces caused by the difference in the geometry of the wheel rolling surfaces from a circular cone, which occurs due to wheel wear. Wheel wear is accompanied by the appearance of additional inertia forces that affect the nature of wheel rolling and the forces of contact interaction between wheels and rails, which are also included in the calculation of forces in couplings that form the longitudinal dynamics of the train. The dependence of forces on vertical irregularities of the track is also taken into account.
ОСНОВНЫЕ ПРОБЛЕМЫ НАДЕЖНОСТИ ВЫСОКООБОРОТНЫХ ЭЛЕКТРОЦЕНТРОБЕЖНЫХ ПОГРУЖНЫХ НАСОСОВ СЕРИИ ЭЦН АКМ
Authors: В.М. Коропецкий , И.С. Сплавский 
Published: November 2024

В статье представлены основные проблемы трибомеханики высокооборотных электроцентробежных погружных насосов серии ЭЦН АКМ (номинальная частота вращения 10 000 об/мин) при эксплуатации в осложненных нефтяных скважинах.
The article presents the main problems of tribomechanics of high-speed electric submersible pumps of the ESP AKS series (rated rotation speed 10,000 rpm) during operation in complicated oil wells.
ПОВЫШЕНИЕ ТОЧНОСТИ ПРОМЫШЛЕННЫХ РОБОТОВ ПУТЕМ ПРИМЕНЕНИЯ ДВУХДВИГАТЕЛЬНЫХ СЛЕДЯЩИХ ЭЛЕКТРОПРИВОДОВ
Authors: В.Л. Афонин , В.В. Слепцов , А.Е. Аблаева , С.С. Кананадзе 
Published: November 2024

В статье проведен синтез двухдвигательных электроприводов промышленных технологических роботов и определены их основные технические характеристики. Выбраны тип и параметры регуляторов положения и скорости таких электроприводов, предложена структурная схема системы управления, позволяющая исключить влияние погрешностей, определяемых люфтом в механических передачах.
The article synthesizes dual-motor electric drives of industrial technological robots and determines their main technical characteristics. The type and parameters of position and speed controllers for such electric drives have been selected, and a block diagram of the control system has been proposed to eliminate the influence of errors determined by backlash in mechanical transmissions.
АНАЛИЗ РЕЗУЛЬТАТОВ ПОЛУЧЕНИЯ ТЕРМОМЕХАНИЧЕСКИХ ДИАГРАММ НА ОСНОВЕ ГИПОТЕЗ ПЛОСКОГО НАПРЯЖЁННО-ДЕФОРМИРОВАННОГО СОСТОЯНИЯ И ПЛОСКОЙ ДЕФОРМАЦИИ ДЕТАЛЕЙ В ТМС КОЛЕЦ И ЦИЛИНДРОВ
Authors: Д.У. Хасьянова , Н.В. Раков 
Published: November 2024

В статье представлен анализ результатов получения термомеханических диаграмм на основе гипотез плоского напряженно-деформированного состояния и плоской деформации деталей в ТМС колец и цилиндров.
The article presents an analysis of the results of obtaining thermomechanical diagrams based on the hypotheses of a flat stress-strain state and flat deformation of parts in TMS rings and cylinders.
КОМПЛЕКС НЕРАЗРУШАЮЩЕГО КОНТРОЛЯ ТЕХНИЧЕСКОГО СОСТОЯНИЯ ТОКАРНОГО СТАНКА С ЧИСЛОВЫМ ПРОГРАММНЫМ УПРАВЛЕНИЕМ TNC-20
Authors: А.П. Печенкин , А.Д. Пашко 
Published: November 2024

В процессе эксплуатации технологическое оборудование с числовым программным управлением неизбежно сокращает свой ресурс, для обеспечения его бесперебойной работы проводятся ремонтные работы. На текущий момент ремонт оборудования проводится по заранее определенному плану, который не может гарантировать исключение аварийных ситуации, тем самым являясь несовершенным. Предлагается внедрить на производство комплекс неразрушающего контроля технического состояния оборудования. Предлагаемый комплекс позволит проводить регулярные проверки текущего состояния узлов и агрегатов оборудования. На основании полученных данных, можно сделать вывод о пригодности оборудования к работе и перейти на систему ремонтов относительно текущего состояния оборудования, что позволит сократить затраты на ремонт оборудования и снизить вероятность его аварийного выхода из строя.
During operation, technological equipment with numerical control inevitably reduces its service life, and repairs are carried out to ensure its smooth operation. At the moment, the repair of equipment is carried out according to a predetermined plan, which cannot guarantee the exclusion of emergency situations, thereby being imperfect. It is proposed to introduce a complex of non-destructive testing of the technical condition of the equipment into production. This complex will allow regular checks of the current condition of equipment components and assemblies. Based on the data obtained, it is possible to conclude that the equipment is suitable for operation and switch to a repair system regarding the current condition of the equipment, which will reduce the cost of repairing equipment and reduce the likelihood of its emergency failure.
Conclusions
Authors: Douesnel Laurent , Khonsari Roman Hossein 
Published: November 2024

Après une discrète apparition dans le monde de la santé au début des années 2000, il a fallu une dizaine d’années pour que l’impression 3D s’implante et soit à l’origine de nombreux projets innovants dans le quotidien des soignants. En chirurgie maxillo-faciale, tous les domaines de la spécialité sont impactés, et plus particulièrement la chirurgie orthognathique. En effet, le transfert des planifications chirurgicales s’est transformé avec une transition des méthodes conventionnelles (chirurgie à main levée ou gouttières occlusales traditionnelles) vers des méthodes numériques utilisant la technologie 3D, offrant réduction du temps opératoire, amélioration de la précision des mouvements réalisés, aisance chirurgicale et sécurité du patient.

L’internalisation de la production de dispositifs médicaux (DM) s’intègre dans une dynamique de modernisation du monde hospitalier et d’auto-suffisance vis-à-vis du monde industriel. En plus d’économies financières, elle permet d’optimiser la prise en charge des patients en offrant des DM adaptés au cas par cas dans une fenêtre thérapeutique étroite. Elle offre un dynamisme interdisciplinaire, facilite la formation des internes, recentre la prise en charge autour du chirurgien – seul responsable des actes – et limite la diffusion d’informations médicales sensibles.

À ce jour, il n’existe pas en France de plateforme 3D intra-hospitalière conforme aux exigences du règlement UE 2017/745, et notamment de l’alinéa 5 de l’article 5 relatif à la mise sur le marché des DM produits et utilisés au sein des établissements de santé, et de l’annexe I du règlement relative à la sécurité et aux performances.

À partir du travail de l’équipe de chirurgie maxillo-faciale du CHU de Nantes, nous avons exposé et illustré ces exigences règlementaires. Bien qu’avancé, le dossier d’auto-certification des gouttières occlusales Computer Assisted Design / Computer Assisted Manufacturing (CAD / CAM) en tant que DM de classe I doit encore être complété de plusieurs éléments avant d’être transmis aux autorités compétentes.

Cependant, la présence sur le marché de DM équivalents certifiés CE risque de rendre caduc ce projet innovant. Des discussions doivent avoir lieu avec les autorités nationales et européennes pour aboutir à une révision règlementaire au vu des arguments présentés en faveur de l’internalisation et de l’amélioration de la sécurité des patients. Tous ces éléments en font un enjeu de santé publique en Europe.
Technology-Integrated Instructions and Basic Mathematics Skills Acquisition in Public Secondary Schools in Rwanda: A Case of Nyagatare District
Authors: BYIRINGIRO Jean , Faustin MUGIRANEZA 
Published: November 2024

This research investigated the effects of technology-integrated instructions on basic mathematics skills in Rwandan secondary education. The study aimed to assess the types of technology-integrated instructional methods used for acquiring basic math skills in Rwandan public secondary schools, assess the level of mathematics skills and performance in these schools, and determine the relationship between technology-integrated teaching and the acquisition of basic math skills. Schools were selected based on their location and type. Theory used in this research project was cognitive load theory and constructivism theory. The target population included 214 teachers, 422 students, and 80 head teachers, total of 716 respondents, with a sample size of 257 participants. Data was gathered using questionnaires, interviews, and observation, employing purposive, stratified, and simple random sampling methods. Both qualitative and quantitative data collection and analysis methods were used. Qualitative data were analysed through content analysis, while quantitative data were presented using descriptive statistics (frequency, percentage, mean, and standard deviation) and inferential statistics (correlational and regression analysis) with IBM SPSS Version 21.0. Findings for the first objective showed that 85.7% of respondents strongly agreed on the use of computer algebra systems, 93.5% strongly agreed on blended learning and online education, 87.0% strongly agreed on the use of mobile and handheld devices, and 63.6% strongly agreed on software applications for mathematics calculations as methods influencing the acquisition of basic math skills. Regarding the second objective, 87.0% of teachers strongly agreed that verbal counting ability indicates math skill levels, 93.5% agreed that identifying more and less of a quantity shows math skills, 85.7% agreed on problem-solving skills as an indicator, 66.2% on recognizing numerals, and 77.9% on understanding size, shape, and patterns as indicators of math skills and performance. The study revealed a strong positive relationship between skills such as identifying quantities, verbal counting, problem-solving, and blended learning or online education. Problem-solving skills were also positively linked with computer algebra systems and blended learning. The significance of verbal counting was confirmed, as indicated by a p-value of less than 0.05. The study recommends using digital tools like calculators and graphing software to improve understanding of mathematical concepts. Real-world examples and multimedia can foster problem-solving abilities, while group work can enhance teamwork and communication skills. Educational software and online platforms provide personalized learning, enabling students to learn at their own pace and receive specific support.
Influence of Gender Participation in Sport on Students’ Academic Performance in Public Day Secondary Schools in Rwanda: A Case of Muhanga District
Authors: MUKAMABANO Marie Chantal , MUGIRANEZA Faustin 
Published: November 2024

The study explored the influence of gender participation in sport on students’ academic performance in day public secondary schools in Rwanda, specifically the case of Muhanga district. The specific objectives of this research were to assess the availability of sport resources in day public secondary schools in Muhanga district, Rwanda, to examine the students’ academic performance in day public secondary schools in Muhanga district, Rwanda, and to evaluate the relationship between gender participation in sport and students’ academic performance in day public Secondary schools in Muhanga District, Rwanda. The research targeted a population of 912 including 720 students, 144 teachers and 48 Head teachers selected from different schools in all sectors of Muhanga district, Rwanda. A sample size of 279 respondents were used, this include 221 students and 44 teachers were randomly selected and 14 head teachers selected purposively. Data collection was through questionnaires made for students and teachers, and interview guides designed for school head teachers. The method of data analysis involved the utilization of IBM SPSS 22.0. Every piece of information from the surveys and interviews was consistently grouped into categories. Following that, the information was showcased and talked about through the use of tables and figures. The research findings reveal critical gaps in sports resources in public day secondary schools in Muhanga district, Rwanda. A significant 57.9% of students reported inadequate sports facilities, and 52.9% cited insufficient equipment, highlighting the need for improvement. While 54.8% felt sports did not enhance their academic performance, 44.8% indicated it motivated academic engagement. Regarding gender participation, 54.3% believed sports positively influenced academic results, yet 56.1% felt insufficient efforts were made to promote gender equality in sports. Teachers largely recognized the academic benefits of athletic involvement. These findings emphasize the need for improved sports resources and greater gender inclusivity to enhance academic success. The research emphasizes the need for educational policymakers to integrate sports with academics to enhance student development and ensure gender equality in sports participation. It advocates for structured programs that develop essential skills and calls on the Ministry of Education to provide adequate resources and training for teachers.
Thiết kế, chế tạo hệ thống Radar xuyên đất gắn trên máy bay không người lái
Authors: Đào Ngọc Long , Phạm Cao Đại , Trần Công Anh , Nguyễn Đăng Hải 
Published: November 2024

Radar xuyên đất (Ground-Penetrating Radar, GPR) lợi dụng khả năng có thể xuyên qua các vật liệu không nhìn thấy bằng mắt thường để phát hiện và tạo dựng hình ảnh các vật thể bị chôn vùi, ẩn giấu dưới lòng đất đã và đang được sử dụng rộng rãi như một công cụ cảm biến từ xa. Đối với địa hình phức tạp, radar xuyên đất khó triển khai theo phương pháp truyền thống, như đặt trên xe đẩy. Với sự phát triển của nền tảng máy bay không người lái (Unmanned Aerial Vehicles, UAV), các hệ thống GPR gắn trên UAV giúp mở rộng khả năng làm việc và tăng hiệu quả của GPR. Trong bài báo này, đầu tiên chúng tôi giới thiệu tổng quan các nghiên cứu về hệ thống radar xuyên đất gắn trên UAV. Tiếp theo, dựa trên kết quả phân tích tổng quan, lý thuyết tính toán và yêu cầu thực tiễn, một hệ thống radar xuyên đất gắn trên UAV do chúng tôi thiết kế, chế tạo và thực nghiệm được trình bày chi tiết. Cuối cùng, chúng tôi đánh giá những yếu tố ảnh hưởng đến chất lượng và các triển vọng tương lai liên quan đến công nghệ này.
Основні складові гостинності у готельно-ресторанній сфері
Authors: Вівсюк І. О. , Терещук О. С. , Лук’янець А. В. 
Published: November 2024

Діяльність підприємств готельно-ресторанної сфери перебуває в умовах турбулентності під впливом зовнішніх чинників, таких як наслідки всесвітньої пандемії та початок повномасштабного вторгнення агресора на територію України. Тож, питання вирішення проблеми залучення нових споживачів та збереження існуючих шляхом удосконалення та підвищення рівня гостинності є актуальним для вивчення. Метою даного дослідження є поглиблення теоретичних засад поняття «гостинність» та визначення її основних складових у готельно-ресторанній сфері. Дослідження ґрунтується на системному підході до вивчення, аналізу й узагальнення джерел щодо понять «індустрії гостинності» та «гостинність». Під час дослідження, задля досягнення мети, було застосовано низку загальнонаукових та спеціальних методів пізнання, зокрема: систематизації та порівняння сутності поняття «гостинність» іншими науковцями, аналізу та синтезу задля визначення основних компонент гостинності у готельно-ресторанному господарстві та конкретизації задля охарактеризування встановлених складових. У ході дослідження було удосконалено дефініцію поняття «гостинність» як комплекс підходів до обслуговування споживачів в закладах готельно-ресторанного господарства. Також, було запропоновано структурувати гостинність на основі визначених основних складових, таких як: персонал, сервіс, безпека, атмосфера, інноваційні технології та послуга (продукт). Охарактеризовано кожний компонент гостинності у готельно-ресторанній сфері. Теоретичне значення дослідження полягає в поглиблені теоретичних засад поняття «гостинність» та визначення основних компонент, що формують даний феномен в діяльності підприємств готельно-ресторанного господарства. Методика оцінювання гостинності в кількісному вираженні та її вплив на економічну ефективність діяльності закладів залишається відкритим, що і визначено метою подальших наукових досліджень. Тип статті: теоретична.
Detection of decline in estimated glomerular filtration rate in patients with type 2 diabetes by cystatin C-based equations
Authors: Tran Tam Thai Thanh , Ha Tien Kim , Phan Nhut Minh , Le Minh Van , Nguyen Tin Hoang 
Published: November 2024

BACKGROUND
Aging population is a significant issue in Viet Nam and across the globe. Elderly individuals are at higher risk of chronic kidney disease (CKD), especially those with diabetes. Several studies found that the estimated glomerular filtration rate (eGFR) determined using creatinine-based equations was not as accurate as that determined using cystatin C-based equations. Cystatin C-based equations may be beneficial in elderly patients with an age-associated decline in kidney function. Early determination of eGFR decline and associated factors would aid in appropriate interventions to improve kidney function in elderly patients with diabetes.
AIM
To determine the utility of cystatin C-based equations in early detection of eGFR decline and to explore factors associated with eGFR decline in elderly patients with diabetes.
METHODS
This cross-sectional study included 93 participants aged ≥ 60 years evaluated in Can Tho University of Medicine and Pharmacy Hospital between October 2022 and July 2023, including 47 and 46 participants with and without diabetes respectively, according to the American Diabetes Association criteria for diabetes. The kappa coefficient, Student’s t, Mann-Whitney, χ 2, Pearson’s correlation, multivariate logistic regression, and multiple linear regression analyses were employed.
RESULTS
The eGFRs were lower with the cystatin C-based equations than with the creatinine-based equations. Good agreement was found between the Modification of Diet in Renal Disease (MDRD) and CKD Epidemiology Collaboration (CKD-EPI) 2021 creatinine-cystatin C equations (kappa = 0.66). In the diabetes group, 30% of the participants had low eGFR. Both plasma glucose and glycated hemoglobin were associated with an increased risk of eGFR decline (P < 0.05) and negatively correlated with eGFR (P = 0.001). By multivariate logistic regression, total cholesterol, and exercise were independently associated with low eGFR. By multiple linear regression, higher plasma glucose levels were correlated with lower eGFR (P = 0.026, r = -0.366).
CONCLUSION
Cystatin C-based equations were superior in the early detection of a decline in eGFR, and the MDRD equation may be considered as an alternative to the CKD-EPI 2021 creatinine-cystatin C equation. Exercise, plasma glucose, and total cholesterol were independently associated with eGFR in patients with diabetes.
Outcomes of a 12-month course of early and late rituximab BCD020 biosimilar administration in juvenile systemic lupus erythematosus: A retrospective study
Authors: Kalashnikova Elvira , Isupova Eugenia , Gaidar Ekaterina , Lubimova Natalia , Sorokina Lyubov , Chikova Irina , Kaneva Maria , Raupov Rinat , Kalashnikova Olga , Aliev Damir , Gaydukova Inna , Kostik Mikhail 
Published: November 2024

BACKGROUND
Juvenile systemic lupus erythematosus (SLE) is a severe, life-threatening disease. However, the role of rituximab in managing juvenile SLE remains undefined, although early biological intervention may improve disease outcomes.
AIM
To assess the differences in the outcomes of different types of rituximab administration (early and late).
METHODS
In this retrospective cohort study, the information of 36 children with SLE with early (less than 6 months from onset) rituximab administration (ERA), and late (more than 1 year) rituximab administration (LRA) was analyzed. We compared initial disease characteristics at onset, at baseline (start of rituximab), and at the end of the study (EOS) at 12 months, as well as outcomes and treatment characteristics.
RESULTS
The main differences at baseline were a higher daily median dose of corticosteroids, increased MAS frequency, and a higher Systemic Lupus Erythematosus Disease Activity Index (SLEDAI) in the ERA group. No differences in the main SLE outcomes between groups at the EOS were observed. The part of lupus nephritis patients who achieved remission changed from 44% to 31% in ERA and 32% to 11% in the LRA group. Patients with ERA had a shorter time to achieve low daily corticosteroid dose (≤ 0.2 mg/kg) at 1.2 (0.9; 1.4) years compared to 2.8 (2.3; 4.0) years (P = 0.000001) and higher probability to achieve this low dose [hazard ratio (HR) = 57.8 (95% confidence interval (CI): 7.2; 463.2), P = 0.00001 and remission (SLEDAI = 0); HR = 37.6 (95%CI: 4.45; 333.3), P = 0.00001]. No differences in adverse events, including severe adverse events, were observed.
CONCLUSION
ERA demonstrated a better steroid-sparing effect and a possibility of earlier remission or low disease activity, except for lupus nephritis. Further investigations are required.
De rechtsstaat: juridische ondergrens of politiek richtsnoer?
Authors: Pasterkamp S.J. , Stremler M. 
Published: November 2024

De rechtsstaat: juridische ondergrens of politiek richtsnoer?
Dit artikel bespreekt de rechtsstaatopvatting die ten grondslag ligt aan het rapport van de Staatscommissie rechtsstaat, waarin de staatscommissie naar aanleiding van de toeslagenaffaire aanbevelingen doet voor het versterken van de rechtsstaat in Nederland. De staatscommissie breidt het gangbare liberaal-democratische rechtsstaatsbegrip uit door de rechtsstaat nadrukkelijk een sociale (‘voorwaardenscheppende’) dimensie te geven, die met name sociale grondrechten omvat. De auteurs waarschuwen dat deze uitbreiding het risico van politisering van de rechtsstaat met zich brengt. Als sociale en economische problemen tot rechtsstatelijke kwesties worden verheven, vervaagt het onderscheid tussen politieke vraagstukken en rechtsstatelijke normen. Op Europees niveau maakt de verruimde uitleg het bovendien moeilijker om staten met rechtsstatelijke problemen te bekritiseren. De auteurs pleiten daarom voor terughoudendheid bij het opnemen van een sociale dimensie als essentieel onderdeel van de rechtsstaat​.