bluuebunny/crossref_metadata_2025_split huggingface dataset:
On the dependence of the thermal module of elasticity of a two-component magnetic fluid on frequency, concentration and magnetic field
Authors: Zarifzoda A. Q. , Bozorova Yu. K. 
Published: October 2024

Purpose. Study of the dependence of the thermal modulus of elasticity of a two-component magnetic fluid on the magnitude of the magnetic field strength, the frequency of external disturbance and the volumetric concentration of magnetic particles.Method. The research method is based on the kinetic theory of liquid systems. Based on previously constructed kinetic equations for one-particle and two-particle distribution functions and a microscopic expression for the heat flux vector, an explicit dynamic expression for the thermal modulus of elasticity of magnetic fluids is obtained. In fast processes in liquids, heat transfer occurs in waves and their propagation is similar to the propagation of second sound in helium II. The thermal modulus of elasticity in liquids appears at high frequencies and ensures the propagation of second sound. The expression for the thermal modulus of elasticity consists of potential and kinetic parts, taking into account structural and translational relaxation processes, respectively. To study the thermoelastic properties of magnetic fluids, appropriate expressions of potential interaction energies were selected for each subsystem, allowing for numerical calculations.Results. Numerical calculations of the frequency and concentration dependence of the dynamic thermal modulus of elasticity in the presence of an external magnetic field in a kerosene-based magnetic fluid were carried out. The calculation results show that an increase in the influence of external disturbances leads to a nonlinear increase in the thermal modulus of elasticity in the magnetic fluid. An increase in the volume concentration of magnetic particles and an increase in the magnetic field strength also led to a nonlinear increase in the thermal modulus of elasticity in the magnetic fluid.Conclusion. It has been established that, due to taking into account translational and structural relaxation processes, the region of frequency dispersion of the thermal elastic modulus is wide. Numerical calculations carried out at different values of the external magnetic field and the volume concentration of magnetic particles showed that although an increase in the magnetic field and concentration of magnetic particles leads to an increase in the thermal modulus of elasticity, their increase does not affect the change in the frequency dispersion region.
Influence of inhomogeneous magnetic field source location on the intensity of thermomagnetic convection in a closed loop
Authors: Koskov M. A. 
Published: October 2024

Purpose. Obtaining information on the influence of the location of the inhomogeneous magnetic field source relative to the heated section of a vertical hydrodynamic loop filled with magnetic fluid on the intensity of convective heat transfer along the loop.Methods. Experiments were carried out using a hydrodynamic loop made of a thin tube of circular cross-section and placed in a vertical plane. Heat source was carried out by a heater on a short vertical section of the loop, and heat removal was implement out by blowing the entire surface of the tube with thermostated air. The source of the magnetic field was the flat pole tips of the ferrite magnetic core, in the gap between which the heater was located. The position of the pole tips relative to the heater varied vertically in the experiments. In the control experiments, the source of the magnetic field was deleted. The circuit was filled with medium concentrated magnetic liquid of the type "magnetite - kerosene - oleic acid". The intensity of steady-state convective heat flow along the tube was calculated from the results of measuring the tube surface temperature by copper-constantane thermocouples. The measurement results were presented in dimensionless form - the relationship between the Nusselt number and Rayleigh number.Results. The unfluctuating mixed, thermomagnetic and gravitational, convection of the magnetic fluid in the loop was observed at any location of the pole tips of the magnetic core relative to the heater. At location of pole tips above the heater, competition of gravitational and thermomagnetic convection was observed, and the heat flux was weak. When the pole tips were placed below the heater, the Nusselt number was 2 - 4 times higher than in the control tests (only gravitational convection) with equal Rayleigh numbers. The highest Nusselt numbers were obtained when the field source was placed in center of the heater.Conclusion. Information on the influence of the relative location of the magnetic field source and the heater on convective heat transfer by magnetic fluid in a hydrodynamic loop is obtained experimentally. The optimal concerning of heat transfer intensity position of the field source was found.
Structure and properties of powders obtained by electrodispersion of pure Nickel metal waste in distilled water
Authors: Ageeva E. V. , Lоktionova O. G. , Ulitin D. A. , Ageeva A. E. 
Published: October 2024

Purpose. Investigation of the composition, structure and properties of powder materials obtained by electrodispersion of nickel waste of the PNK-0T1 brand in an oxygen-containing medium – distilled water.Methods. To determine the composition, structure and properties of powder materials, samples of powders obtained from waste nickel grade PNK-0T1 were studied. The powder material was obtained by electroerosive dispersion in distilled water. Microanalysis of powder particles was carried out using a scanning electron microscope, an analysis of the size distribution of powder particles was obtained using a particle size analyzer, an X-ray spectral microanalysis of powder particles was carried out using an energy-dispersive X-ray analyzer embedded in a scanning electron microscope, an analysis of the phase composition of powder particles was carried out using X-ray diffraction on the diffractometer.Results. During the study, it was revealed that the shape of the particles obtained from nickel powders is spherical and elliptical, and agglomerates of smaller particles are also noted on the increase. Oxygen and nickel are present in the composition of powder materials. The phases of pure nickel and nickel oxide NiO are marked in the phase composition. From the analysis of the granulometric histogram, it follows that the particle size spread varies in the range of 0.26...18.62 microns, the average volume diameter of the particles was 5.2 microns.Conclusion. The obtained research results can be used to develop a new heavy pseudo-alloy using metal waste from expensive raw materials by the method of electroerosive dispersion, followed by improvement and optimization of the composition and structure of the alloy.
مؤشرات القدرة التنافسية لمجموعة بريكس في الإقتصاد العالمي
Authors: Ahmad Muhsin Ibrahim 
Published: October 2024

تلعب مجموعة بريكس دوراً مهماً في الساحة الدولية، كونها تتميز عن بقية التكتلات الدولية، من حيث أنها تشكلت من إتحاد دول من أربع قارات متباعدة، والتي تمثل أيضاً أربع حضارات متنوعة، وكذلك فإنها تتضمن قوتين دائمتي العضوية في مجلس الأمن الدولي من جهة، فضلاً عن تباين معدلات النمو الإقتصادي لدول المجموعة.
وتهدف مجموعة بريكس الى دعم قيام نظام دولي متعدد الأقطاب، وإصلاح هيئة الأمم المتحدة ومجلس الأمن التابع لها، بالإضافة الى إصلاح المؤسسات المالية الدولية.
يهدف البحث الى التحقق من فرضيته القائمة على أساس أن مجموعة بريكس بإمكانها أن تنافس التكتلات والمجاميع الإقتصادية القائمة في العالم، لما تمتلكها من مقومات و إمكانات المنافسة، وأن تنجح في إصلاح المؤسسات الدولية بحيث تعبّرعن تطلعات الجميع وترعى مصالحها والقضاء على القطبية الواحدة في السياسة الدولية. وخرج البحث بنتيجة مؤداها أن مجموعة بريكس تفوقت على مجموعة السبع في (5) مؤشرات من أصل (12) مؤشراً أستخدمت في تحليل القدرة التنافسية لمجموعة بريكس في الإقتصاد العالمي.
Managing a Double-Edged Sword: The Paradoxical Dynamics of Participative Development of Pricing Control
Authors: Jarmatz Martin , Thrane Sof , Zichella Giulio 
Published: October 2024

ABSTRACT
This study presents a field investigation into the dynamics of developing pricing control designs between the global headquarters of a large multinational company and its most important sales subsidiary. The paper employs a paradox theoretical lens to analyze the development of pricing control designs through employee participation. We report two key findings. First, we outline contradictions between a decentralized, subjective approach and a centralized, financial approach to pricing, conceptualizing the tensions underlying this dilemma. Second, we conceptualize the paradoxical features of the centralization–decentralization dilemma, focusing on how processes switch between virtuous and vicious cycles. We find that employee participation in development processes paradoxically advances and undermines the development of centralized pricing control designs.
JEL Classifications: M41; M42; C990.
Percepción del esfuerzo bajo protocolo de ingesta de carbohidratos en ciclistas aficionados
Authors: Quintero Cristina 
Published: October 2024

Introducción: Una ingesta óptima de carbohidratos permite un buen desempeño y recuperación en deportes de resistencia como en el ciclismo de ruta. Objetivo: Evaluar la percepción del esfuerzo según los criterios de “la escala de Borg” bajo la implementación de acompañamiento nutricional que controla de manera individual la ingesta de carbohidratos en los momentos del antes y el durante un entrenamiento de resistencia de 4 horas de duración, en ciclistas aficionados. Materiales y métodos: Se realizó una investigación evaluativa, con dos momentos de medición transversal; uno sin acompañamiento nutricional y un segundo momento, con prescripción alimentaria para el antes y durante un entrenamiento. Para ello, se seleccionaron por conveniencia 8 ciclistas recreativos de la ciudad de Medellín. Resultados: No se mostraron diferencias estadísticamente significativas en la percepción del esfuerzo tras la prescripción de carbohidratos para el antes y durante, respecto a la percepción del esfuerzo obtenida previa a dicha prescripción. Conclusión: Como principal hallazgo se identificaron variables metabólicas y de composición que pueden ser tenidas en cuenta en futuras intervenciones para establecer correlaciones fisiológicas y de alimentación en deportes de resistencia.
Time-variant left ventricle models for intracardiac impedance analysis
Authors: Voss Daniel , Wemmer Clara , Leonhardt Steffen , Walter Marian 
Published: October 2024

Abstract
Cardiovascular diseases are a leading cause of mortality worldwide. Thus, critically ill patients require continuous monitoring of cardiovascular indicators, such as the left ventricular volume (LVV). Although continuous hemodynamic monitoring of patients is desirable, due to technical limitations, current measurement technologies either require manual intervention of the physician or only provide inaccurate results. Intracardiac impedance measurements are a promising approach for continuous assessment of cardiac function. However, developing and evaluating these methods requires a simulation model of the left ventricle with cardiac motion during an entire cardiac cycle. While many models exist for a fixed ventricle size, to date, no freely available models incorporate time and represent the cardiac motion during a complete cardiac cycle. Therefore, we developed four cardiacmechanical left ventricular models with varying ventricle sizes and complexities. Each model focuses on a different aspect of the geometric shape, thus allowing an isolated analysis of the different influences. This paper presents the development of the models and initial results of the impedance analysis. All measured admittances exhibit a high resemblance for all models and a strong, non-linear correlation with the LVV. A comparison between the models shows how the different geometries affect the impedance. The models, thus, provide a useful basis for the development of LVV estimation algorithms.
COMBATING THE SILENT THREAT OF STREET TRADING RESULTING IN ILLEGAL DUMPING OF WASTE IN UGANDA
Authors: Aidonojie Paul Atagamen , Aidonojie Esther Chetachukwu , Obieshi Eregbuonye , Akinsulore Adedoyin Olusegun , Owuche Antai Godswill , Kolawole Adebayo Adesoji 
Published: October 2024

The Uganda government has taken legal and institutional measures (such as the Uganda constitution, National Environmental Act and the Climate Change Act) to ensure clean and healthy environment and resolving major environmental issues. However, the rate of street trading within the terrain of Uganda, has resulted in the illegal dumping of refuse. It suffices to state that illegal dumping of refuse could generate major environmental issues such as flood, soil pollution, water pollution, air pollution, and destruction of habitat. This study embarks on a hybrid method of study in examining the need to combat the threat of street trading associated with the illegal dumping of waste. 290 questionnaires were sent to respondents residing in the various regions of Uganda. The data obtained through the questionnaire was analyzed using a descriptive and analytical method of research. The study therefore found that, there are unchecked incidents of street trading which often result in illegal dumping of refuse. Furthermore, the continuous dumping of refuse as a result of street trading could result in severe environmental pollution. The study therefore concludes and recommends that for a sustainable environment free from any form of pollution, there is a need for the Uganda government to through institutional measures reinforce the laws against illegal dumping of refuse resulting from street trading.
ACADEMIC ENTREPRENEURSHIP: ESSENCE AND MAIN CHARACTERISTICS
Authors: Helzhynska Tetiana 
Published: October 2024

Стаття присвячена вивченню проблеми академічного підприємництва. Визначено тенденції міжнародного простору вищої освіти, які обґрунтовують потребу у розвитку академічного підприємництва. Виконано аналіз довідкової літератури, яка подає трактування понять “академічний”, “підприємництво”, а також досліджено напрацювання науковців щодо трактування поняття “академічне підприємництво”. Представлено передумови розвитку академічного підприємництва (спрямованість на інноваційність, демонстрація потенціалу університету, комерціалізація науки і трансфер знань, конкурентна перевага на ринку, відповідність потребам ринку і суспільства), а також умови, за яких можливий розвиток підприємницького університету (автономність, ефективний менеджмент, гнучкість, інтеграція науки, освіти та бізнес-середовища). У статті висвітлено переваги розвитку академічного підприємництва (налагодження зв’язків із зовнішнім середовищем, підвищення престижності університету, розвиток науки і її популяризація, вдосконалення освітнього процесу, приваблення абітурієнтів і працевлаштування випускників, диверсифікація фінансування, поліпшення матеріально-технічної бази). Зроблено висновки, що академічне підприємництво – це поліфункціональний освітній феномен та соціально-економічний конструкт, що охоплює діяльність сучасного університету, спрямовану на ефективне використання усіх різновидів ресурсів з метою задоволення внутрішніх потреб, освітніх, наукових, технологічних, інноваційних запитів суспільства та економіки знань, різних галузей науки, і передбачає капіталізацію власного інтелектуального потенціалу. Визначено перспективи подальших наукових досліджень.
Characterization of Bacterial and Fungal Biofilms in Chronic Rhinosinusitis
Authors: Foreman Andrew , Psaltis Alkis James , Tan Lor Wai , Wormald Peter-John 
Published: October 2024

Background Conclusive evidence exists that biofilms are present on the mucosa of chronic rhinosinusitis (CRS) patients. Less is known about the species constituting these biofilms. This study developed a fluorescence in situ hybridization (FISH) protocol for characterization of bacterial and fungal biofilms in CRS. Methods Fifty CRS patients and 10 controls were recruited. Bacteria FISH probes for Staphylococcus aureus, Haemophilus influenzae/ and Pseudomonas aeruginosa and a universal probe for fungi were applied to sinus mucosal specimens and then analyzed using confocal scanning laser microscopy. Results Thirty-six of 50 CRS patients had biofilms present in contrast to 0/10 controls, suggesting a role for biofilms in the pathogenesis of this disease. S. aureus was the most common biofilm-forming organism. Eleven of 50 CRS patients hid characteristic fungal biofilms present. Conclusion This is the largest study of biofilms in CRS. It has validated mucosal tissue cryopreservation for delayed biofilm analysis. Fungal biofilms have been identified and the importance of S. aureus biofilms in the polymicrobial etiology of CRS is highlighted.
Safe sites in the mandibular buccal shelf for orthodontic mini-screws: Tomographic study in different facial types
Authors: Ribeiro Annelise Nazareth Cunha , Domingos Rafael Gorghetto , Lima Junior Almir , Rino Neto Jose , de Paiva João Batista 
Published: October 2024

Objectives:
The objective of this study was to verify safe sites on the mandibular buccal shelf (MBS) for extra-alveolar mini-screw insertion according to facial type.

Material and Methods:
In this retrospective study, 84 cone-beam computed tomography scans were equally divided into three groups according to the patient’s facial type: Group 1, hyperdivergent; Group 2, neutral; and Group 3, hypodivergent. The total buccal alveolar bone thickness was measured in five zones between the mesial root of the first molar and the distal root of the second molar, 3, 6, and 9 mm apical to the cementoenamel junction (CEJ).

Results:
MBS areas with adequate thickness for temporary anchorage device (TAD) insertion were as follows: Group 1, second molar distal root 9 mm from the CEJ; Group 2, second molar distal root 6 and 9 mm from the CEJ; and Group 3, second molar mesial root 9 mm from the CEJ and second molar distal root 6 and 9 mm from the CEJ.

Conclusion:
The safe zones on the MBS for TAD insertion were located on the distal root of the second molar, 9 mm from the CEJ, for all facial types. For neutral and hypodivergent patients, the site located on the second molar distal root, 6 mm from CEJ, was included; for hypodivergent patients, the site located on the second molar mesial root, 9 mm from the CEJ, was included.
Unmet Spiritual Needs: A Study among Patients with Chronic Illness
Authors: Mathew Leemamol , Kunnath Binu 
Published: October 2024

Objectives:
The conventional healthcare system operates on the ‘physiological man’ and overlooks the ‘spiritual man’. Many studies reported on the unmet spiritual needs of terminally ill patients. Despite spiritual care being a predictor of a positive mindset (meaning making) among patients with terminal illnesses, assessing spiritual needs and providing adequate spiritual care is still a distant phenomenon in the healthcare setting.

Materials and Methods:
With the help of a spiritual needs questionnaire, we analysed the unmet spiritual needs and preferences of 30 terminally ill patients. Specific attention was given to psychosocial, emotional, existential, religious and acceptance of death.

Results:
The results show that 72% of terminally ill patients reported a strong desire to have their spiritual needs met. Psychosocial needs scored the highest, while acceptance of dying scored the least. The need to be connected with the family was one of the strongest wishes expressed in the study. Religious needs ranked as the second category of needs. Findings show that the highest needs are intertwined with the patients’ culture.

Conclusion:
In India, religion and family connections are essential; terminally ill patients expressed the desire that meeting these two aspects makes their lives meaningful even at the end stage. The results warrant a spiritual needs assessment as a deathbed test to make the end–of–life more meaningful.
Опыт реконструкции башнеобразного сооружения на поселении Дубки
Authors: Малышев А.А. , Моор В.В. 
Published: October 2024

Античные башнеобразные сооружения ‒ одно из самых заметных составляющих антропогенного ландшафта полуострова Абрау. Ареал двухкамерных башен раннеримского времени – фортов-застав (praesidia) – специфичен: он связан с периферийными районами азиатского и европейского Боспора. В предлагаемом исследовании предпринята попытка воссоздать внешний вид башенного сооружения, исследованного в 2005‒2009 гг. в глубине Анапской долины Маскаги (хора Горгиппии, юго-восток азиатского Боспора), на мысообразном выступе восточного склона горы Маскага. Серьезный импульс для создания логичной и полноценной реконструкции могут дать многочисленные этнографические и исторические аналогии из предгорий Центрального Предкавказья и Ближнего Востока. В исследовании отмечено, что, несмотря на свою однотипность, башенные сооружения могли возводиться в разных вариациях, которые зависели от имеющихся потребностей и ландшафтных условий (например, размеров мысообразного выступа). В частности, сооружение могло иметь различное количество уровней, причем минимальная по этажности ‒ двухуровневая конструкция.
Ancient Roman towerlike constructions are one of the most visible features of the man-made landscape in the Abrau Peninsula. The area of the two-chamber towers dating to the early Roman period – praesidia or fort-gates – is specific because it is linked to the peripheral areas of the Asian and European Bosporus. This study is attempting to recreate the exterior look of the towers excavated in 2005‒2009. These towers are located deep into the Anapa valley of Maskaga (the Gorguipia khôra) on a promontorylike ledge of the eastern slope of Mt. Maskaga. Numerous ethnographic and historical analogies from the piedmont areas of the Central Fore-Caucasus and the Near East may give momentum to consistent and complete reconstruction. The study shows that despite the uniformity of type, towers could be erected in different variations which depended on existing needs and landscape features (for example, the size of the promontorylike ledge). The structure, for instance, could have a different number of levels, a two-level structure had the minimum number of stories.
Неизвестная коллекция предметов из музея «Пруссия» в фондах Государственного исторического музея («Дар директора Бецценбергера »)
Authors: Хомякова О.А. 
Published: October 2024

Статья посвящена атрибуции и публикации коллекции бус из музея «Пруссия» Кёнигсберга в фондах ГИМ. Данные рассматриваются в свете современных данных о памятниках и материальной культуре племен Балтии первых веков н. э. Подаренный А. Бецценбергером во время XV Археологического съезда в Новгороде в 1911 г. Московскому археологическому обществу набор античных бус представляет наиболее характерные типы изделий для культур Юго-Восточной Прибалтики римского периода и эпохи Великого переселения народов.
The paper reports on the attribution and publication of a collection of beads from the Prussia Museum of Koenigsberg in the holdings of the State Historical Museum. The data are examined in the context of contemporary knowledge of the sites and material culture of the Baltic communities in the first centuries of the Common Era. This set of ancient Roman beads handed over by Bezzenberger as a gift to the Moscow Archaeological Society at the 15th Archaeological Congress held in Novgorod in 1911 is made up of the most typical items associated with the cultures of Southeastern Baltics during the Roman period and the Migration period.