bluuebunny/crossref_metadata_2025_split huggingface dataset:
Material Influence on the Micropitting and Wear Resistance of Nitrided External and Internal Gears
Authors: Geitner M. , Zornek B. , Hoja S. , Tobie T. , Stahl K. 
Published: December 2023

Abstract
Due to increasing performance requirements and sometimes tribologically challenging operating conditions in gears (such as those found in wind turbines), alternative heat treatment processes to quenching and tempering or case hardening are becoming more and more important. Nitriding can significantly increase the load-carrying capacity of gears compared to the quenched and tempered initial state. The nitrided surface layer is characterized by a hard compound layer on the surface that is just a few micrometers thick and a diffusion zone that extends deeper into the material. The structure of the compound layer of iron and alloy element nitrides is primarily decisive for the wear behavior of nitrided components.
Previous studies on nitrided gears with regard to micropitting and wear focus primarily on a systematic variation of the compound layer on gears made of nitriding steel 31CrMoV9. Results on the influence of the base material on the micropitting and wear resistance of nitrided gears are not yet available.
In systematic load and speed stage tests, nitrided gears made from a quenched and tempered steel (42CrMo4) and a material with an alternative alloy composition (34CrNiMo6) were examined in addition to the reference (nitriding steel 31CrMoV9). Both external and internal gear pairings were tested, with the alternative materials showing more favorable tribological behavior in some cases. The results are presented and categorized according to the current state of the art. Finally, recommendations for the practical use of nitrided gears are derived.
Unusual onset of Graves’ disease associated with thymic hyperplasia in a 5-year-old girl with congenital bilateral clinical anophthalmia: diagnostic and therapeutic challenges
Authors: Ben Rabeh Rania , Bouzidi Ahmed , Hamdi Rim , Missaoui Nada , Bouyahia Olfa , Mazigh Sonia , Boukthir Samir 
Published: December 2023

Abstract

Objectives
Graves’ disease (GD) is a rare auto-immune disorder in pediatric population. The association between GD and thymic hyperplasia was rarely reported in children. Diagnosis and management of GD are challenging in children.

Case presentation
This report presents the case of a 5-year-old girl with a personal history of asthma and congenital bilateral isolated clinical anophthalmia who presented with acute congestive heart failure, sinus tachycardia and atypical signs of orbitopathy with edema and erythema of the lower right eyelid and excessive tearing. The diagnosis of GD was based on detecting a suppression of serum TSH level and the presence of high titers of TRAbs. Relapse occurred after 10 months of antithyroid drugs with chief complaints of palpitations, dyspnea and dysphagia. Computed tomography showed heterogeneous anterior mediastinal mass with no invasion into the surrounding tissue. The marked shrinkage of the mass after radioiodine therapy supported the diagnosis of thymic hyperplasia associated with GD.

Conclusions
The presence of clinical anophthalmia may be a confusing factor for the diagnosis of Gravesʼ ophthalmopathy. Recognition of the association between GD and thymic hyperplasia would avoid invasive diagnostic procedures and unnecessary surgical resection. Radioiodine therapy may be used in young children with repeated relapses of GD.
Prominently enhanced luminescence from a continuous monolayer of transition metal dichalcogenide on all-dielectric metasurfaces
Authors: Iwanaga Masanobu , Yang Xu , Karanikolas Vasilios , Kuroda Takashi , Sakuma Yoshiki 
Published: December 2023

Abstract
2D materials such as transition metal dichalcogenides (TMDCs) are a new class of atomic-layer materials possessing optical and electric properties that significantly depend on the number of layers. Electronic transitions can be manipulated in artificial resonant electromagnetic (EM) fields using metasurfaces and other designed nanostructures. Here, we demonstrate prominently resonant enhancement in the photoluminescence (PL) of atomic monolayer, WS2, doped with a small quantity of Mo. The excitonic PL showed a strong enhancement effect on a higher-order magnetic resonance of all-dielectric metasurfaces consisting of periodic arrays of Si nanopellets. The PL intensity witnessed a 300-fold enhancement compared to the reference PL intensity on a flat silicon dioxide (SiO2) layer, which suggests a drastic change in the dynamics of photoexcited states. Confocal PL microscopy and the analysis revealed that the single photons were coherently emitted from the TMDC monolayer on the metasurface. Furthermore, examining the PL lifetime in the ps and ns timescales clarified two exponential components at the prominent exciton PL: a short-time component decaying in 22 ps and a long-time component lasting over 10 ns. Therefore, we can infer that the radiative components were significantly activated in the TMDC monolayer on the metasurfaces in comparison to the reference monolayer on a flat SiO2 layer.
Semiotic approach of strategic narrative: the news discourse of Russia’s coronavirus aid to Italy
Authors: Ventsel Andreas 
Published: December 2023

Abstract
Crucial components of strategic communication include the audience, which plays a decisive role in how any conflict plays out. Strategic narratives are seen as means by which political actors attempt to construct a shared meaning of international politics to shape the behaviour of domestic and international actors. The article analyzes the news discourse of the Russian media sources RT, Pervyj Kanal, and NTV on Russia’s coronavirus aid to Italy in spring 2020. In the context of media coverage, some methodological questions arise: How should the intentional structuring of narratives, targeting of audiences, and the manipulative intentions of the strategic actor be studied? For this purpose, the article combines strategic narrative theory with Umberto Eco’s concepts of the Model Reader and the Model Author. Analysing the aims and intentionality of the strategic narratives, we postulate the Model Reader as an analytical category that organizes the study of the audience’s interpretation process. The function of the Model Reader is to actualize the codes and intertextual references that the author has strategically planned in the news message, in order to achieve the geopolitical aims of the strategic narratives in question. The analysis of constructing the Model Reader and the Model Author of strategic narratives is complemented by Greimas’ semiotic theory of the narrative and the composition principles of Lotman’s discrete/non-discrete texts.
The role of temperature on collector adsorption in galena flotation: Implications of seasonal temperature and climate change
Authors: Baltodano-Obregon Nicole , Ojeda Villegas Sandra Daniela , Uribe-Salas Alejandro 
Published: December 2023

AbstractThis research focuses on studying the effects of the operating temperature and preconditioning time on the adsorption kinetics of sodium diisobutyl dithiophosphinate and sodium isopropyl xanthate collectors on the surface of galena, using contact angle measurements. The results indicate a strong correlation between higher operating water temperature and increased contact angles, suggesting faster adsorption kinetics and heightened hydrophobicity. Statistical analysis underscores the significance of temperature and preconditioning time, both factors being statistically significant. This study delves into the intricate interaction between temperature fluctuations and collector adsorption, contributing to a deeper understanding of flotation processes within the Pb/Cu circuit during seasonal temperature variations.
Graphical abstract
Organizational change management model proposal: action-research in a public exam company.
Authors: Serrano Filho Eduardo de Souza , Junior Jorge Muniz , Martins Fernando Ramalho 
Published: December 2023

Purpose – The presented research aimed to propose a model for organizational change management for a public examination company, which has experienced a significant increase in its activities and business environment in recent decades.
Design/methodology/approach – The adopted methodological approach was action research. The collected data allowed for the identification of the dominant culture within the organization and the assessment of its internal and external environment. This information informed the selection of an appropriate change management model.
Findings – Two results emerged from the research, one of general use and the other specific to the context: i. a method for choosing change management models, and ii. a detailed management model outlined for the analyzed organization.
Originality/value – The academic contribution consisted of developing a method for searching and selecting a management model. It is noteworthy that this method itself represents an initial outcome of the research with a high level of applicability, not limited to companies in the public examination sector. Regarding the final product, the selected and detailed model's primary contribution lies in guiding the organization in making adjustments to remain competitive and continue its operations. The outlined steps include the necessary care and attention to details in implementing changes, aiming to effectively contribute to the success of the adaptations required by the market scenario.
Keywords: Organizational change. Change management. Organizational culture.
INDUSTRIAL AND SERVICES MARKETING STRATEGIES: conceptual framework to analyze the impacts of B2B relationship in CNC machines segment
Authors: Veloso Ribeiro Ricardo , Piato Éderson Luiz , Lopes Pimenta Márcio , Fodra Marcelo 
Published: December 2023

Purpose: The objective of this study is this propose a conceptual framework on the relationship between the strategic elements of services marketing and industrial marketing elements.
Methodology/Approach: A multi-case study was conducted on four multinational manufacturer companies of machinery and equipment, leaders in the segment in which they operate, and 9 business customers, with full participation of 29 professionals. The research was developed analyzing the services’ marketing strategies and their impact on the relationship, commitment, trust, price, cooperation and brand value, from the perspective of manufacturers and client companies.
Findings: The results showed that replacement items prices act directly on the relationship and the perception of the manufacturer's commitment to customers. Commitment and trust can be achieved through transparent and accurate communication, generating greater cooperation between the parties, which contributes to the long-lasting relationship.
Research limitations: The limitations of this study are the reduced number of buyers, in addition to the difficulties of access to large factories.
Practical implications: The study shows that the concepts of Marketing Strategies and Marketing B2B. This research proposes a framework on the relationship between the strategic elements of services marketing and industrial marketing elements.
Originality/ Value: There are few academic studies that demonstrate the influence of marketing strategies services in industrial exchanges (B2B). This paper proposes a conceptual framework on the relationship between the strategic elements of marketing services and industrial marketing elements.
Research of the application of elements of sports games in the process of therapeutic physical education activities
Authors: Dorontsev A. V. , Porubayko L. N. , Zinchuk N. A. , Lyamina Yu. A. 
Published: December 2023

Recent studies have shown that the use of elements of team sports in physical education classes in a special medical group “B” (therapeutic physical education) remains one of the promising areas and, at the same time, a rather complex methodological problem, caused in many cases by concomitant diseases of students. When discussing the features and advantages of various team sports in the mode of practical exercises in therapeutic physical culture in universities, it is necessary to pay attention to the differentiated use of elements of sports games in accordance with the existing pathology.Purpose. Determine the most effective complexes of physical activity using elements of team sports.Materials and methods. The material for the work was the results of a current medical examination, motor tasks that make it possible to determine the level of development of physical qualities, and data from a functional test. The research was conducted at the departments of physical education of Astrakhan State Medical University and Kuban State Medical University and Astrakhan State University in the 2021/22 academic year. Based on functional tests, the level of physical fitness of those involved was analyzed, and hemodynamics were determined during physical activity classes using elements of team sports. The work used standard methods of mathematical analysis.Results. A reliable correlation was revealed between the use of elements of team sports and the level of increase in the regulatoryadaptive potential of the cardiovascular system, reduction of BMI, elements of team sports were identified that are advisable to recommend for the appropriate medical group. During the work, data were obtained on the effectiveness of using elements of sports games for students assigned to medical group “B”.Conclusions. It is advisable to use elements of basketball in the form of developing coordination abilities, mastering techniques of ball possession with changing parameters in space and time interval. In our opinion, this format allows you to vary the intensity of physical activity in accordance with the level of functional and physical fitness of students. In the same group, it is possible to use elements of volleyball and the game of volleyball itself according to simplified rules. The individual duration of rest breaks should allow the cardiorespiratory system to be restored to background levels.
Analysis of morphometric parameters of children’s kidneys according to ultrasound data
Authors: Kurtusunov B. T. , Usmanov I. A. , Trizno M. N. 
Published: December 2023

Objective. To identify the features of morphometric indicators of children’s kidneys according to ultrasound data, depending on height and age.Materials and methods. Morphometric indicators of the kidneys of children, according to ultrasound examination protocols of 280 male and female children aged 0 to 16 years.Results. The study revealed that in all studied groups of children, the length of the left kidney was greater than the right. The most intensive increase in length occurs at heights of 60–90 cm and 150–170 cm. When analyzing gender differences in kidney growth in length, it was found that in both girls and boys the first “jump” in kidney growth is observed when the length of children is from 60 to 90 cm, and both buds grow at the same rate. The second “jump” in the increase in kidney length occurs at heights of 130–160 cm and 140– 170 cm. These changes in kidney length coincide with the intensive growth of the child in the first three years of life, and then with the onset and course of puberty. Based on the data obtained, it was revealed that the most significant increase in kidney parameters occurs in the first year of life. Thus, by the year of life, the length and width of the kidney increased by 20 %, and thickness by 10 %. By the 4th year of life, with average height (100 cm), length and width increased by another 20 %, and thickness by 32 % from the original.
Poluição por mercúrio na Amazônia: Efeitos sobre o meio ambiente e a saúde humana
Authors: Costa Karina da Silva Lopes , Costa Josivan da Silva 
Published: December 2023

Os vários garimpos de ouro, legais e ilegais, espalhados pela Amazônia, tem despertado o desenvolvimento de pesquisas sobre o descarte de mercúrio e suas implicações ambientais e na saúde humana. Este trabalho de revisão, objetivou a abordagem da problemática da poluição ambiental por mercúrio. Para isso, utilizou-se pesquisa bibliográfica com ênfase na poluição ambiental e suas consequências sobre os peixes e sobre o consumo de peixes contaminados pelas populações da Amazônia. Foi possível constatar que o consumo de peixe é a principal fonte de exposição das pessoas ao mercúrio. Em relação às mulheres grávidas, tem afetado a gestação e o feto, podendo resultar em má formação congênita. Tem afetado o comportamento emocional, neuropsicológico, a capacidade motora e as proporções físicas de adultos e crianças da Amazônia brasileira. Conclui-se que a problemática do mercúrio pode ser muito maior do que se apresenta, uma vez que pesquisas sobre a bioacumulação desse metal se concentra na determinação em peixes e seres humanos e a pesquisa em plantas e animais terrestres é incipiente.
Беспилотные автомобили: перспективы и ожидаемые последствия экспансии
Authors: Блинкин Михаил Яковлевич , Кулакова Анастасия Александровна 
Published: December 2023

В статье представлен обзор перспектив и ожидаемых последствий, связанных с приходом на автомобильный рынок и в состав транспортного потока автономных транспортных средств (autonomous vehicles, AV), то есть автомобилей, оснащенных теми или иными программно-аппаратными средствами, предназначенными для помощи водителю в решении «динамической задачи вождения», и в конечном итоге способных заменить традиционного биологического водителя на цифрового в сложной динамической среде.
Представлена современная 6-уровневая классификация систем поддержки действий водителя (Advanced Driver-Assistance Systems, ADAS) — от нулевого уровня (Level 0), при котором автомобиль оборудован разве что ABS (антиблокировочной системой), до пятого уровня (Level 5), на котором достигается полная автоматизация вождения. Транспортные средства данного уровня не требуют внимания человека, здесь «динамическая задача вождения» как таковая устраняется из компетенции пользователя (уже не водителя!). У автомобилей уровня L5 (в полной мере беспилотного!) нет руля, а также педалей газа и тормоза.
Рассмотрены правовые ограничения, связанные с необходимостью внесения дополнений и изменений принципиального плана в Венскую конвенцию о дорожном движении от 1968 года, согласно которой каждое транспортное средство должно иметь водителя, «обладающего необходимыми физическими и психическими качествами», а также «знаниями и навыками, необходимыми для управления».
Основной материал статьи посвящен разбору ожидаемых (прогнозируемых, вероятных) позитивных и негативных последствий, связанных с массовым приходом AV уровня Level 3, Level 4 и особенно Level 5. При этом акцент сделан на последствиях этого явления, представляющих особый интерес в урбанистическом и транспортноградостроительном аспектах: влиянию на форматы землепользования и расселения, транспортное поведение горожан, территориальные предпочтения домохозяйств и компаний, пропускную способность автомобильных дорог, расщепление спроса на передвижения между индивидуальным и общественным транспортом, безопасность дорожного движения.
Общий вывод заключается в том, что влияние массового прихода AV на авторынок и в структуру транспортного потока будет сравнимо по масштабу и долгосрочности последствий с процессом массовой автомобилизации населения, стартовавшим в начале XX века.
Чтобы предсказывать с уверенностью, планируйте свободу
Authors: Уокер Джарретт 
Published: December 2023

Каким будет городской транспорт через 10–20 лет? Как автоматизированные транспортные средства будут взаимодействовать с тенденциями социальных и культурных перемен, определяя лицо завтрашнего города? Будет ли автомобиль будущего персональным или общим? Как изменится ценообразование, чтобы мотивировать поведение потребителя? Что будет с общественным транспортом? Какие еще можно ожидать инновации, способные изменить ландшафт города будущего?
Эта статья, представляющая собой лишь выжимку из более подробной аргументации, предлагает три взаимосвязанных ответа:
• Мы не можем этого знать. История всегда была непредсказуемой, перемежающейся потрясениями, но с ускорением темпов изменений непредсказуемость также может возрастать.
• Не зная, мы не можем сделать убедительных выводов. Удивительным образом многие факты, касающиеся транспортной системы, в том числе довольно контринтуитивные идеи, способные привести к серьезным преобразованиям, если бы они были более широко осознаны, могут быть описаны и получить солидное обоснование, даже несмотря на ограниченные эмпирические свидетельства или даже их полное отсутствие, потому что они вытекают из законов геометрии и физики или почти аксиоматических принципов биологии.
• В любом случае предсказание само по себе может не иметь никакого значения. Даже отказавшись от надежды предсказать будущее, мы все равно можем убедительно описать результаты инвестиций в транспортную систему так, что это будет полезно для тех, кого никогда не интересовали прогнозы пассажиропотока или анализ экономического воздействия. Мы также можем предсказать их в том же смысле, в котором мы можем предсказать бесконечную последовательность знаков числа пи после запятой. Эта идея — свобода и то, как транспортная система увеличивает или уменьшает ее.
REORIENTATION OF THE RUSSIAN ECONOMY AS A CONSEQUENCE OF THE SANCTIONS IMPOSED (ON THE EXAMPLE OF RELATIONS WITH CHINA)
Authors: Осташевский В.Д. 
Published: December 2023

Рассматриваются новые партнерские отношения между Россией и Китаем в условиях введения санкций западными странами. В работе приведена основная статистика товарооборота между Китаем и Россией, а также ключевые товары, перемещаемые между странами. Освещены основные события, связанные с развитием российско-китайского экономического сотрудничества.
The article addresses new partnerships between Russia and China in the context of the sanctions imposed by Western countries against Russia. The paper presents the main statistics of trade between China and Russia, as well as key goods moved between countries. The main events related to the development of Russian-Chinese economic cooperation are highlighted.
FORMATION AND MANAGEMENT OF ENTERPRISE CASH FLOWS IN CONDITIONS OF INSTABILITY MANAGEMENT
Authors: Панарин А.В. 
Published: December 2023

Актуальность темы исследования определяется особой значимостью управления денежными потоками компании в целях обеспечения ее финансового благополучия и укрепления платежеспособности, особенно в современных условиях ограничения источников финансирования и их удорожания. Целью статьи является анализ денежных активов организации, как эти активы управляются и распределяются сбалансированным образом между подразделениями предприятия. В работе рассмотрены теоретические и методологические основы управления денежными средствами в компании и сделан вывод о том, управление денежными потоками является одной из главных функций при ведении хозяйственной деятельности предприятия.
The relevance of the study is determined by the particular importance of managing a company’s cash flows in order to ensure its financial well-being and enhance solvency, especially in the current context of limited sources of finance and their rising cost. The aim of the article is an analysis of the monetary assets of the organization, how these assets are managed and distributed in a balanced way between the divisions of the enterprise. The article considers the theoretical and methodological foundations of cash management in the company and concludes that cash flow management is one of the main functions in the conduct of business activity of the enterprise.