bluuebunny/crossref_metadata_2025_split huggingface dataset:
МАТЕМАТИЧЕСКАЯ МОДЕЛЬ ЗАДАЧИ О ТЕЧЕНИИ НЕНЬЮТОНОВСКОЙ НЕСЖИМАЕМОЙ ЖИДКОСТИ В ЗАЗОРЕ МЕЖДУ ДВУМЯ ВРАЩАЮЩИМИСЯ ЦИЛИНДРАМИ
Authors: Купцов В.С. , Катрахова А.А. 
Published: January 2025

представлена математическая модель, при помощи которой решается задача вращения двух цилиндров в неньютоновском потоке несжимаемой жидкости. Для решения представленной задачи использовались цилиндрическая система координат для уравнений в частных производных (в напряжениях) и уравнение неразрывности данного течения. При этом учитывалась конвективная часть уравнений, описывающих течения жидкости. Рассматривалась модель неньютоновской жидкости с нелинейными компонентами напряжений. Течение жидкости установившееся. С учетом нелинейности поля напряжений данного течения жидкости вычислены компоненты скоростей деформации и напряжений, а также вычислен момент всех сил относительно оси симметрии по какой-либо окружности произвольного радиуса. Рассмотрен вариант решения задачи, совпадающий с классическим, но для неньютоновского стационарного потока несжимаемой жидкости. Получены аналитические формулы для вычисления гидродинамических параметров потока течения неньютоновской жидкости. Формулы применяются для конкретных неньютоновских жидкостей аналитически или численно в зависимости от вида жидкости и условий технической задачи. Частный случай данного результата совпадает с формулами для задачи в аналогичной постановке для ньютоновского стационарного потока вязкой несжимаемой жидкости
in this work, a mathematical model is constructed that considers the problem of rotation of two cylinders in a non-Newtonian flow of incompressible fluid. To solve this problem, a cylindrical coordinate system was used for partial differential equations (in stresses) and the continuity equation for a given flow. When solving the problem, the convective part of the equations describing fluid flows was taken into account. A model of a non-Newtonian fluid with nonlinear stress components was considered. The fluid flow was steady. Taking into account the nonlinearity of the stress field of a given fluid flow, the components of strain rates and stresses were calculated, and the moment of the milestone forces relative to the axis of symmetry along any circle of arbitrary radius was calculated. A variant of solving the problem is considered, which coincides with the classical one, but for a non-Newtonian stationary flow of incompressible fluid. In this formulation of the problem, analytical formulas are obtained for calculating the hydrodynamic parameters of the flow of a non-Newtonian fluid. The formulas can be applied to specific non-Newtonian fluids analytically and numerically, depending on the type of fluid and the conditions of the technical problem. A special case of this result coincides with the formulas for a problem in a similar formulation for a Newtonian stationary flow of a viscous incompressible fluid
ИССЛЕДОВАНИЕ ВЛИЯНИЯ КОМПАУНДОВ НА ХАРАКТЕРИСТИКИ ПЛАНАРНОГО ТРАНСФОРМАТОРА В МОДУЛЕ ЭЛЕКТРОПИТАНИЯ
Authors: Бобылкин И.С. , Кузёмкин А.А. , Ивашкина Е.М. , Безрукавый А.М. 
Published: January 2025

в современном мире электроники и электротехники всё большее значение приобретают компактные и эффективные решения для систем электропитания. Планарные трансформаторы, благодаря своей плоской конструкции, представляют собой перспективное направление для уменьшения размеров и веса модулей электропитания. Однако их изготовление требует особого внимания к выбору и использованию компаундов, которые играют ключевую роль в обеспечении надёжности, безопасности и эффективности работы трансформаторов. Компаунды выполняют несколько важных функций: герметизация, электроизоляция, взрывозащита и влияние на тепловые характеристики. Рассматривается исследование влияния компаундов на характеристики планарного трансформатора в модуле электропитания, приводится анализ различных типов компаундов и их воздействия на параметры трансформатора, такие как индуктивность, потери, температурный режим и надёжность. Представлены результаты экспериментальных исследований, которые позволяют оценить эффективность использования различных компаундов для улучшения характеристик трансформатора. Также обсуждаются перспективы применения полученных результатов в разработке современных модулей электропитания. С результатами будет полезно ознакомиться специалистам в области электротехники, электроники и проектирования электронных устройств при изучении данных и рекомендаций для оптимизации и модернизации трансформаторных модулей
in the modern world of electronics and electrical engineering, compact and efficient solutions for power supply systems are becoming increasingly important. Planar transformers, due to their flat design, represent a promising direction for reducing the size and weight of power supply modules. However, their manufacture requires special attention to the selection and use of compounds, which play a key role in ensuring the reliability, safety, and efficiency of transformers. Compounds perform several important functions: sealing, electrical insulation, explosion protection and influence on thermal characteristics. The study of the influence of compounds on the characteristics of a planar transformer in a power supply module is considered, an analysis of various types of compounds and their effects on transformer parameters such as inductance, losses, temperature regime and reliability is given. The results of experimental studies are presented, which allow us to assess the effectiveness of using various compounds to improve the characteristics of the transformer. The prospects of applying the results obtained in the development of modern power supply modules are also discussed. It will be useful for specialists in the field of electrical engineering, electronics, and design of electronic devices to familiarize themselves with the results when studying data and recommendations for optimization and modernization of transformer modules
УМЕНЬШЕНИЕ ГАБАРИТНЫХ ПАРАМЕТРОВ РАДИОТЕХНИЧЕСКИХ УСТРОЙСТВ С УЧЕТОМ СНИЖЕНИЯ ПОТЕРЬ В ТРАНСФОРМАТОРЕ ИСТОЧНИКА ПИТАНИЯ
Authors: Веретенников Н.Ю. 
Published: January 2025

основным путем к снижению габаритных размеров радиотехнических устройств является уменьшение габаритов магнитного компонента импульсного источника питания посредством повышения частоты работы преобразователя. Однако с увеличением рабочей частоты магнитного компонента может страдать его эффективность, вследствие возникновения высокочастотных потерь на перемагничивание сердечника и потерь, вызываемых вихревыми токами в медных проводниках. Рассмотрены основные механизмы возникновения высокочастотных потерь в обмотках магнитных компонентов с накоплением энергии, а также способ аналитического моделирования высокочастотных потерь в обмотках, вызываемых эффектом близости. Наиболее популярным способом снижения потерь в силовых трансформаторах является чередование обмоток с применением провода оптимальной толщины. Однако в обратноходовом преобразователе в силу особенностей топологии силового каскада обмотки работают попеременно. При этом, пассивные слои обмоток выступают в качестве экрана, и их потери могут существенно превышать потери в обмотках, проводящих ток. Показано, что, несмотря на невозможность компенсации поля в обратноходовом трансформаторе, чередование обмоток способно перераспределить вихревые токи в обмотках, и, как следствие, уменьшить потери, связанные с эффектом близости
the main way to reduce the overall dimensions of radio engineering devices is to optimize the dimensions of the magnetic component of the switching power supply by increasing the frequency of operation of the converter. However, with an increase in the operating frequency of the magnetic component, its efficiency may suffer due to the occurrence of high-frequency losses in the core and copper conductors. In this paper, the main mechanisms of occurrence of high-frequency losses in the windings of magnetic components with energy accumulation are considered, as well as a method for analytical modeling of high-frequency losses in windings caused by the proximity effect. The most popular way to reduce losses in power transformers is to alternate windings using wires of optimal thickness. However, in the reverse-way converter, the windings work alternately. At the same time, losses in the passive layers of the windings can significantly exceed losses in the windings conducting current. It is shown that despite the impossibility of compensating the field in a reverse current transformer, alternating windings can redistribute eddy currents in the windings, and, as a result, reduce losses associated with the proximity effect
The Influence of Teachers' Digital Literacy and the Use of Technology Media on Students' Ability to Identify Hoaxes in the Digital Era
Authors: Simamora Nadia Natalia , Alrefay Khaled Ahmed , Qasem Arwa Ahmed , Lorenzo Arnold , Kara Merve Kara 
Published: January 2025

Purpose of the study: This study aims to examine the influence of teacher digital literacy and the use of media technology on students' ability to identify hoaxes in the digital era.
Methodology: A mixed-method approach was employed, combining quantitative analysis using Multiple Linear Regression with Statistical Package for the Social Sciences (SPSS) and qualitative analysis with the Miles and Huberman model through interviews with teachers. The research sample consisted of 50 teachers and 200 students from secondary schools in both urban and rural areas, selected through purposive sampling. The research instrument used a questionnaire and interview guide.
Main Findings: The results indicated that both teacher digital literacy and the use of media technology positively influenced students' ability to identify hoaxes. Teachers with higher digital literacy levels were able to effectively use media technology to guide students in critical thinking and information verification. The use of media technology helped students compare information from different sources and better assess its validity.
Novelty/Originality of this study: This study contributes to the field by exploring the combined impact of teacher digital literacy and media technology usage on students' ability to recognize and evaluate misinformation, addressing a critical issue in the context of education in the digital age.
Mengungkap Pengaruh Sales Promotion dan Shopping Lifestyle dalam Meningkatkan Pembelian Impulsif pada Platform E-Commerce Lazada
Authors: Aprianti Vika , Simarmata Harianto , Ni’mah Aenun 
Published: January 2025

Penelitian ini bertujuan untuk mengetahui pengaruh sales promotion dan shopping lifestyle terhadap impulse buying pada e-commerce lazada. Metode penelitian yang digunakan adalah deskriptif dan verifikatif dengan pendekatan kuantitatif. Dengan pemilihan sampel yaitu simple purposive sampling dan mengambil sampel 100 responden. Berdasarkan hasil yang diperoleh bahwa sales promotion, shopping lifestyle dan impulse buying masuk dalam kategori tinggi. Data dianalisi menggunakan teknik uji asumsi klasik analisis regresi linier berganda, koefisien korelasi, determinasi, uji t dan uji F. Berdasarkan hasil pengujian diperoleh hasil adanya pengaruh yang signifikan sales promotion terhadap impulse buying sebesar 0,473 atau 47,3%, shopping lifestyle berpengaruh signifikan terhadap impulse buying sebesar 0,530 atau 53,0% dan sales promotion dan shopping lifestyle berpengaruh signifikan terhadap impulse buying sebesar sebesar 0,566 atau 56,6%. Hasil penelitian secara parsial menunjukan sales promotion berpengaruh terhadap impulse buying dan shopping lifestyle berpengaruhterhadap impulse buying. Hasil penelitian secara simultan sales promotion dan shopping lifestyle berpengaruh positif dan signifikan terhadap impulse buying pada e-commerec lazada.
ANALISIS STRATEGI PEMASARAN DALAM MENINGKATKAN MINAT BELI KONSUMEN DIBEDAR RESTO DAN KAFE DALAM PERSFEKTIF EKONOMI ISLAM
Authors: Faturohman Adji , Jum’an  
Published: January 2025

This study uses a quantitative research approach. The type of research used in this research is a type of field research, with a sample of 47 respondents. The method used in the analysis is with the help of google forms and for data processing using SPSS statistics 25 Partially the income variable has a significant effect on students' saving awareness at the Mini Bank Laboratory. Thus it can be concluded that the first hypothesis which states that there is an effect of the income variable on saving awareness and is significant, H1 is accepted and Ho is rejected. Partially, the financial literacy variable has a significant effect on students' saving awareness at the Mini Bank Laboratory.
Thus it can be concluded that the second hypothesis which states that there is an effect of the financial literacy variable on saving awareness and is significant that H2 is accepted and Ho is rejected. Simultaneously there is an influence between income and financial literacy on students' awareness of saving at the Laboratory of the Mini Bank of the Islamic Institute of Sultan Muhammad Syafiuddin Sambas, which is indicated by the Fcount> F table of 16.347>3.209 while the significance level is smaller than 0.05, which is 0. 000<0.05 so that the effect is 42.6%. Thus it can be concluded that income and financial literacy have a positive effect on saving awareness.
POTENSI PASAR RAKYAT DALAM MENINGKATKAN KESEJAHTERAAN PEDAGANG PASAR RAKYAT KECAMATAN TEBAS KABUPATEN SAMBAS DALAM PERSPEKTIF EKONOMI ISLAM
Authors: Mega  , Kusnadi Iwan 
Published: January 2025

This research is motivated by the traditional market which is increasingly left behind and there are indications that the market is one of the efforts in the process of increasing the welfare of traders in an economy. With this kind of business, it is hoped that it will enable traders to create better economic conditions than before. In order for this achievement to be carried out optimally, it is considered necessary to explore the existing potential to then be developed optimally.
The data validity technique used is triangulation. Based and the results of the study it can be concluded that the potential of the people’s market in improving the welfare of the people’s market traders in Tebas distric in an Islamic economic perspective has the potential to be developed because it has the interest of buyers who are still classified as existing, the price offered is cheap and easily accessible by people from the lower class, products that are there are people’s markets that also have a variety of variations, a strategic market location, and close to he crowds, opposite the location of bus stops and the morning market, is also a potential. In terms of welfare, traders in people’s markets can be categorized as prosperous, that is, seen from the income earned,theybare able to provide sufficient to meet the necessities of life, as well as help the family economy. The fulfillment of welfare in the perspektive of Islamic economics has also been classified as fulfilled, it can be seen from the statements of traders who say that the results of this trade have been able to bring them to go on pilgrimage and umrah.
Analysis of Body Temperature in Patients with Trauma Visiting a Local Emergency Medical Center during the SARS-CoV-2 Outbreak
Authors: Min Hana , Kim* Gun Bea 
Published: January 2025

Background: The study aimed to evaluate the usefulness of body temperature monitoring as a screening tool for Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2).

Methods: This retrospective study was conducted in an emergency department from January 1, 2019, to December 31, 2020. A total of 5,502 out of 9,205 patients with trauma during the pre-pandemic period and 3703 out of 9205 during the pandemic period (age ≧ 18 years old) were enrolled in the study. Data collected included sex, age, time of visit, initial and follow-up BT, Korean Triage and Acuity Scale (KTAS) score, disposition results, time of disposition, time of the first imaging study, and SARS-CoV-2 test results. Patients were divided into two groups based on their body temperature.

Results: During the pandemic period, three out of 832 patients with a body temperature below 37.5°C tested positive for SARS-CoV-2 via polymerase chain reaction, while none of the 342 patients with a body temperature above 37.5°C tested positive negative. However, this was statistically insignificant. Patients with a body temperature over 37.5°C had to wait significantly longer to see a doctor, undergo imaging studies, and receive disposition, especially in non-major trauma cases. Follow-up body temperatures were significantly lower except in KTAS 1- and ICU-admitted patients.

The usefulness of body temperature as a screening tool for trauma patients in the emergency department during the pandemic period is limited and could have detrimental effects on emergency department crowding.
Effect of Different Mulching Materials on Weed Emergence and Quality of Strawberry under Rainfed Conditions
Authors: Maroof Tooba , Tahir Muneeba , Zahid Noosheen , Khan Muhammad Noman Naseem , Younas Muhammad Tahir , Shahzad Jahanzaib , Zafar Tehmina , Zeeshan Muhammad , Pervaiz Arslan , Yasin Ahsan 
Published: January 2025

Strawberry is one of the most attractive fruits among berries. It possess unique place among cultivated berry fruits due to its attractive red color, taste, flavor and high nutritional value. For commercial production plants are propagated from runners but weed infestation is the biggest problem of strawberry crop. In this regard, the current study was designed to use different mulching materials on weed control, morphological and physico-chemical characteristics of strawberry cv. Chandler under rain fed conditions of Rawalakot. The experiment was laid out in randomized complete block design (RCBD) with six mulching treatments. Data was recorded for various parameters including weed control, morphological characteristics, physical characteristics and biochemical characteristics. Results showed that maximum weed control (10.33) was found in strawberry plants grown in black polythene mulch. However, maximum survival percentage (95.75), leaves per plant (8.0), flowers per plants (7.33),fruits per plant (5.33), runners per plant(8.33), chlorophyll a (8.55 g/mL), chlorophyll b (9.26 g/mL), total chlorophyll (18.14 g/mL), fruit weight (2.93g), fruit diameter(2.73 cm) were found in strawberry plants grown in mulching material amended with coconut coir. Bio chemicals parameters like total soluble solids (TSS) (8.50%), titratable acidity (TA) (1.89%), vitamin C (0.25 mg/100g), total anthocyanins (40.06 mg/100g), total phenolics (0.60 mg gallic acid/100 g), total flavonoids (2.86 mg/100gFW), and antioxidant activity (0.89 µg/100 mg FW) were also found maximum in plants grown in coconut coir. Based on current findings it can be concluded that mulching material black polythene was found better for weed control and coconut coir was found better for morphological and physico-chemical characteristics of strawberry
Determining the Nature of IC 10 X-2: A Comprehensive Study of the Optical/IR Emission from an Extragalactic BeHMXB
Authors: Alnaqbi Jwaher , Gelfand Joseph D. , Saikia Payaswini , Heinke Craig , Baglio M. C. , Russell David M. , Zhang Guobao , Manousakis Antonios , Katkov Ivan Yu. , Lewis Fraser 
Published: January 2025

Abstract
We present a comprehensive analysis of the optical and infrared (IR) properties of high-mass X-ray binary (HMXB) IC 10 X-2, classified as a supergiant HMXB and superfast X-ray transient by previous work. Our analysis of regular (daily and weekly) observations by both the Zwicky Transient Facility and Las Cumbres Observatory over a 5 yr period indicates both periodic flares and variations in the apparent magnitude and color with a period of ∼26.5 days—likely the orbital period of this binary system. The periodic flaring suggests the stellar companion is a Be star, with flares resulting from increased accretion onto the neutron star (NS) when it enters the stellar decretion disk. The periodic variations in the optical/IR brightness and color likely result from orbital variations in the hydrogen column density along the line of sight or a transient accretion disk around the NS. Lastly, the numerous short-duration episodes where IC 10 X-2 is significantly “redder” or “bluer” than normal likely result from clumps within this system—which can accrete onto the NS (causing IC 10 X-2 to appear bluer) or pass through the line of sight (causing IC 10 X-2 to appear redder). These results substantially increase our understanding of the evolution of this source, which is a significant source of ionizing photons in its host galaxy IC 10, a low-mass, metal-poor starburst galaxy similar in many respects to those thought to be common in the early Universe.
Constraining the Gamma-Ray Burst Jet Opening Angle Based on the Very Steep Decay Phase
Authors: Xu Qian , Liu Dong-Jie , Zou Yuan-Chuan 
Published: January 2025

Abstract
Thanks to the rapid follow-up observations by the Swift X-Ray Telescope (XRT), a good part of gamma-ray bursts' (GRBs) high-latitude emission have been observed in the X-ray band. Some even show a dropdown decay after this period, which strongly indicates the edge of the jet is corresponding to the breaking time. This study constrains the jet opening angles of GRBs by analyzing the very steep decay phase in the early X-ray afterglow. Using data from Swift/XRT, we identified GRBs with significant breaks in their light curves and applied a broken power-law model to describe the decay phases. Assuming a spherical and isotropic emitting surface, we set constraints on the radiation radius (R

γ
) to estimate jet opening angles (θ
jet) from the breaking time. Our results indicate that jet opening angles can be constrained, although they are sensitive to the assumed radiation radius. This approach provides yet another method for estimating GRB jet opening angles.
Comparison of treatment outcome of conventional drillings, osteotomes, and Densah bur used in dental implant placement in the posterior maxilla
Authors: Gharge Nikhil R. , Saluja Harish , Dhadhich Anuj , Shah Seemit Vinod 
Published: January 2025

Background:
Implant placement in the posterior maxilla is challenging due to the poor quality of the bone and the reduction in vertical bone height that occurs after extracting posterior teeth. In implant dentistry, success rates, osseointegration, and primary and secondary stability are crucial. This study compares the three surgical techniques for implant placement in the posterior maxilla to achieve the better outcomes for the surgeon, patient, and implant stability.

Methodology:
This study was conducted with institutional ethical approval, and informed consent was obtained from all the participants. The inclusion criteria comprised patients aged between 18 and 60 years with edentulous maxillary posterior arches. A total of 60 patients were enrolled in the study and divided into three groups: Conventional, Densah Bur, and Osteotome techniques. Clinical follow-up was conducted over 6 months to assess the treatment outcomes.

Results:
In this study, 19 patients were in the conventional group, 22 in the Densah Bur group, and 19 in the osteotome group. No significant differences in implant stability or crestal bone loss were found among the techniques. The mean primary stability was 3.15 ± 1.57 for the conventional group, 3.52 ± 2.58 for the osteotome group, and 3.63 ± 1.55 for the Densah Bur group. The Densah Bur technique required the least time (9.86 ± 1.79 min), while the osteotome technique took the longest (20.52 ± 1.80 min). The mean torque values were 43.68 ± 7.78 Ncm for the conventional group, 42.95 ± 7.96 Ncm for the Densah Bur group, and 47.36 ± 7.70 Ncm for the osteotome group.

Conclusion:
All three techniques – conventional, Densah Bur, and osteotome – showed good clinical outcomes in a 6-month follow-up, with better implant stability in the osseodensification cases. The novel Densah Bur technique proves superior in enhancing bone density and achieving primary stability in implant placement, particularly in the posterior maxilla with limited bone height and width.