bluuebunny/crossref_metadata_2025_split huggingface dataset:
Non-local boundary value problem for a system of equations with the partial derivatives of fractional order
Authors: Мамчуев М.О. 
Published: March 2023

Исследуется нелокальная краевая задача в прямоугольной области для линейной системы уравнений с частными производными дробного порядка в смысле Римана-Лиувилля с постоянными коэффициентами. Знакоопределенность собственных значений матричных коэффициентов в главной части является существенным признаком таких систем, и эти системы можно разделить на два разных типа, которые заметно отличаются в плане постановок корректных краевых задач. Исследуемая система относится к типу II, т. е. к системам с собственными значениями матричных коэффициентов в главной части разных знаков. Доказана теорема о существовании и единственности решения исследуемой краевой задачи. Получены условия однозначной разрешимости исследуемой задачи в терминах собственных векторов матричного коэффициента в главной части системы.
We study a non-local boundary value problem in a rectangular domain for a linear system of equations with partial fractional Riemann-Liouville derivatives with constant coefficients. The eigenvalues of matrix coefficients in the main part have fixed sign, which is an essential feature of such systems. These systems can be divided into two types which differ in terms of formulation of the correct boundary value problems. The system under investigation relates to the type II, i.e. to systems with the eigenvalues of matrix coefficients in the main part having different signs. We prove the existence and uniqueness theorem for the solution of the investigated boundary value problem. The conditions for the unique solvability of the problem are obtained in terms of the eigenvectors of the matrix coefficients in the main part of the system.
Development and application of combined methods for solving the prediction problems of defining characteristics of composites
Authors: Гусев Е.Л. , Иванова М.А. 
Published: March 2023

Рассматривается проблема решения задач прогнозирования изменения определяющих характеристик композиционных материалов и конструкций при воздействии экстремальных факторов внешней среды. Определяющими характеристиками могут являться остаточный ресурс, надежность, долговечность композиционных материалов и конструкций. Рассмотрено применение комбинированных методов поиска экстремума многопараметрических показателей эффективности для решения обратных задач прогнозирования определяющих характеристик композиционных материалов и конструкций на основе усложненных моделей. Исследован вопрос о наиболее эффективном конструировании комбинированных подходов, представляющих собой совокупность нескольких методов для решения обратных задач прогнозирования определяющих характеристик композиционных материалов и конструкций.
We consider solving the problems of predicting changes in the defining characteristics of composite materials and structures under the inﬂuence of extreme environmental factors. As such determining characteristics, we can take the residual life, reliability, and durability of composite materials and structures. We study the application of combined methods for finding the extremum of multiparametric performance indicators for solving inverse problems of predicting the determining characteristics of composite materials and structures based on complicated models. The question of the most effective design of the combined approaches by implementing several methods for the solution of inverse problems of forecasting the defining characteristics of composite materials and designs is investigated.
Implementation of Students’ Worksheets to Improve Critical Thinking Skills
Authors: Azinah Sitti Zakiyah , Arsyad Muhammad , Khaeruddin Khaeruddin 
Published: March 2023

This study aims to (1) provide an overview of the critical thinking skills of students at SMAN 3 Enrekang, (2) to analyse the improvement of students critical thinking skills using the environment based students’ worksheets at SMAN 3 Enrekang (3) to analyse the improvement of students’ critical thinking skills using the conventional students’ worksheets at SMAN 3 Enrekang (4) to compare the use of environment-based students’ worksheets and conventional ones. The research is a quasi-experimental study. The independent variable is the learning model and the dependent variable is the critical thinking skills of students in learning physics. The population in this study were all students of class XI MIPA. Taken by using purposive sampling technique, class of XI MIPA I was the experimental class and XI MIPA II was the control class. Based on descriptive statistical analysis, it was found that (1) the average pretest and post-test scores of critical thinking skills in the experimental class are both in the high category, while the pretest and post-test scores in the control class was the sufficient category and the high category, respectively (2) there is an increase in students’ critical thinking skills in using an environment based students’ worksheets strategy at SMAN 3 Enrekang, (3) there is an increase in students’ critical thinking skills using conventional students’ worksheets, (4) there are differences in the use of environment based student worksheets where the obtained is 0,15 smaller than α 0,05. These results indicate that there are differences in critical thinking skills of students of SMAN 3 Enrekang when using environmental-based student worksheets and without using environmental-based student worksheets.
The Effectiveness of Digital Stotytelling in Teaching Speaking for Students with Different Gender Classification
Authors: Khotimah Laily Mar'atul , Ningrum Ary Setya Budhi 
Published: March 2023

The purpose of this study is to find out the effectiveness of using digital storytelling towards students’ speaking ability based on gender classification. The samples of this study were two classes of class IX students from MTsN 1 Kediri. The experimental group was Class IX-G, and the control group was Class IX-I. Both pretest and posttest set were used as the research instrument. To determine the effectiveness of the media utilized, ANCOVA analysis was used, and an independent sample T-test was used to determine gender differences. The study's findings revealed the effectiveness of digital storytelling to teach speaking as evidenced by sig.=.0000<.05. Further analysis proceeded to the effectiveness of digital story telling based on gender classification. As evidenced by sig. =.003.05., digital story telling was effective in teaching speaking to female students. Meanwhile, male students were not empowered. By sig=.416 >.05., there was no statistically significant difference between male students taught using digital storytelling and those taught using printed text evidence. It means that both teaching media are equally effective for teaching speaking to male students.
When the Whole Is Less Than the Sum of Its Parts: Russian Developmentalism since the Mid-2000s
Authors: Matveev Ilya , Zhuravlev Oleg 
Published: March 2023

Abstract
While Russia became widely known in the 1990s for its experiment in shock therapy, by the mid-2000s the Kremlin pioneered a new set of policies that amounted to the national variant of the developmentalist approach. In this article, we take stock of the Russian developmentalism, focusing on the role of ideas, the institution-building by the federal and regional governments as well as specific developmental policies. While state-oriented, interventionist approach to economic development has had some successes on the level of individual industries, regions and projects, on the whole, it failed to achieve transformational developmental outcomes. The economy has stagnated for over a decade and the Russian export basket is less sophisticated than it was 20 years ago. We argue that the failure of the Russian approach to developmentalism cannot be reduced to corruption and rent-seeking: the lack of an effective coordination mechanism and a consistent policy strategy underpinned by a foundation in heterodox economics have also played a role.
Analisis Pengaruh Pengetahuan K3 terhadap Perilaku Pekerja Konstruksi ( Studi Kasus : Proyek Preservasi Jalan dan Jembatan Ruas Jalan Perintis Kota Makassar )
Authors: Saraswati Rizki Ayu , Putra Wudi Darul 
Published: March 2023

Inadequate Work Safety Standards and the still high number of work accidents in Indonesia, are evidence of weak attention to the importance of K3 aspects in a construction work. This is motivated by the discrepancy between the understanding of Occupational Safety and Health (K3) knowledge and the application of construction worker behavior, especially in the Makassar City Pioneer Road and Bridge Preservation Project. The assumption of the use of tribute safety which is always underestimated is the cause of the above problems, so it requires direction and guidance on mechanisms, management systems and risks borne by the importance of Occupational Safety and Health. The research method used is regression and correlation analysis, where the regression equation describes the functional relationship to the variables studied. The results showed that there was a high positive correlation relationship between K3 knowledge and work behavior with a correlation value of 0.608 with a range of interpretation of the value coefficient between 0.600 – 0.799. As well as the coefficient of determination (Adjusted r square) of 0.366 or 33.6% of the variables reviewed, which means that 66.4% is influenced by other variables.
Menuju Satu Dekade Pelaksanaan Undang-Undang Desa
Authors: Huda Mi’rojul , Swarizona Silkanika 
Published: March 2023

The village. development of the village continues to transform over time. The new direction of village development has begun seen since the 2014 Village Law, which has entered its 8th (Eight) year. Various innovations are seen as including the Village SDGs as a new paradigm of village development. This paper tries to review village development from time to time using descriptive qualitative methods. The village SDGs as a new paradigm of village development still leaves problems such as the capacity of the village head and village officials who are still unequal. There is lacking of performance accountability on transparency. Besides the data from the SDGs data collection that has not be able to enjoyed and felt by the village. Another problem with the village SDGs paradigm is the appearance of a large intervention from the higher instantion which is feared to reduce the principles of recognition and subsidiarity from
Glass Cliff to Glass Cave: The Leadership Challenge of Belonging
Authors: Koehler Andree 
Published: March 2023

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<p>The purpose of this paper is to offer descriptions of the possible next steps in the evolution of the climb to executive leadership positions, termed the <em>glass cave</em>. The discussion concludes with suggestions for moving beyond the glass cave to create a glass tunnel, or broad path to growth and advancement as well as recommendations for future research directions.</p>
Fracture Mechanics Testing of Plastics
Authors: Osuna David Arencón , de Sousa Pais Antunes Marcelo , de Redondo Realinho Vera Cristina , Velasco José Ignacio 
Published: March 2023

AbstractThere are many different types of polymeric materials, ranging from glassy to semicrystalline polymers and even blends. Their mechanical properties range from pure elastic with very high strains to fracture (elastomers) to almost pure linear elastic (Hookian behavior) with low strains to fracture (glassy polymers). This article provides an overview of historical development of fracture behavior in polymers. It discusses the processes involved in three fracture test methods for polymers, namely linear elastic fracture mechanics, elastic-plastic fracture mechanics, and post-yield fracture mechanics.
Impact Loading and Testing
Authors: Major Zoltán , Stelzer Philipp S. , Kiehas Florian 
Published: March 2023

Abstract
This article reviews the impact response of plastic components and the various methods used to evaluate it.. It describes the effects of loading rate on polymer deformation and the influence of temperature and strain rate on failure mode. It discusses the advantages and limitations of standard impact tests, the use of puncture tests for assessing material behavior under extreme strain, and the application of fracture mechanics for analyzing impact failures. It also develops and demonstrates the theory involved in the design and analysis of thin-walled, injection-molded plastic components.
Thermal Analysis and Thermal Properties
Authors: Pieper Robert 
Published: March 2023

AbstractThis article discusses the thermal properties of engineering plastics and elastomers with respect to chemical composition, chain configuration, and base polymer conformation as determined by thermal analysis. It describes the processing of base polymers with or without additives and their response to chemical, physical, and mechanical stresses whether as an unfilled, shaped article or as a component of a composite structure. It summarizes the basic thermal properties of thermoplastics and thermosets, including thermal conductivity, temperature resistance, thermal expansion, specific heat, and glass transition temperature. It also provides information on polyimide and bismaleimide resin systems. Representative examples of different types of engineering thermoplastics are discussed primarily in terms of structure and thermal properties.
Organic Chemical-Related Failure of Plastics
Authors: Duvall Donald 
Published: March 2023

Abstract
The susceptibility of plastics to environmental failure, when exposed to organic chemicals, can limit their use in many applications. A combination of chemical and physical factors, along with stress, usually leads to a serious deterioration in properties, even if stress or the chemical environment alone may not appreciably weaken a material. This phenomenon is referred to as environmental stress cracking (ESC). The ESC failure mechanism for a particular plastics-chemical environment combination can be quite complex and, in many cases, is not yet fully understood. This article focuses on two environmental factors that contribute to failure of plastics, namely chemical and physical effects.
Characterization of Plastics in Failure Analysis
Authors: Jansen Jeffrey A. 
Published: March 2023

Abstract
This article reviews analytical techniques that are most often used in plastic component failure analysis. The description of the techniques is intended to familiarize the reader with the general principles and benefits of the methodologies, namely Fourier transform infrared spectroscopy, energy-dispersive x-ray spectroscopy, differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical analysis. The article describes the methods for molecular weight assessment and mechanical testing to evaluate plastics and polymers. The descriptions of the analytical techniques are supplemented by a series of case studies to illustrate the significance of each method. The case studies also include pertinent visual examination results and the corresponding images that aided in the characterization of the failures.
To the Question of the Displays of Fear and Anxiety among Children with Mental Retardation
Authors: Portnytska N. F. , Tychyna I. M. 
Published: March 2023

The aim of the article is to study displays of children`s mental retardation. Сombination of research methods, which envisage the self –appraisal of emotional reactions, with an expert evaluation, allows carrying out integral description of displays of anxiety and fears of schoolchildren with mental retardation. Сhildren with mental retardation show an increase in the level of anxiety towards the end of primary school age and a slight decrease in its rates during the transition to secondary school. There are gender differences in the experience of anxiety, which are manifested at the level of content and intensity of fears in children with mental retardation. Limitation of the chosen methodology: low level of reflection and critical thinking of children with mental retardation during self-evaluation of anxiety and fears; subjective character of self-concept of own fears. Knowledge of age dynamics and gender peculiarities of the fears manifestation of children with mental retardation allows developing a complex of preventive and psychotherapeutic influences. The dynamics and gender peculiarities of anxiety and fears among schoolchildren with mental retardation are described in terms of studying at a boarding school.
Importance of independence in the context of future specialists’ psychic health
Authors: Pavlyuk М. M. 
Published: March 2023

The article presents the empirical study of the importance of the “independence” value in the context of future specialists’ psychic health. The article reveals correlations between the “independence” value and such students’ personality characteristics as internal and external motivation, beliefs about independence, an internal role position – functional ego-states, the power to build psychological boundaries, revealing information on the students’ internal and external spaces as an indicator of their psychic health. The article shows that the “independence” value determines a number of the respondents’ personal characteristics: the higher importance of the “independence” value is the higher indicators of internal motivation, the deeper belief that the independence can be acquired (and it is not inherent) and it is a constructive personality trait, the higher self-esteem of independence, self-regulation and motivation, the internal role positions of “Parent-Controller” and “Quiet-Neutral boundaries” in relations with other people is used more often. The deep mechanisms that hinder the future specialists’ independence formation are revealed: co-dependence, anti-dependence, false self, fear of existential loneliness. The conclusion is made that the independence is the result of a person’s internal work, his/her ability to set not only individual goals, tasks, but also determine the whole direction of own activities.
Subjects of Aspirations
Authors: Chamorro Luciana 
Published: March 2023

Abstract
Drawing on ethnographic fieldwork conducted in Gracias a Dios, an urban informal settlement in the Pacific region of Nicaragua, this article examines the mechanisms by which investments in Sandinista partisan politics are reproduced even as promises of redistribution made by the ruling Sandinista National Liberation Front are chronically deferred. Populist governance emerges as the administration of aspirations in the gap between the populist promise and its failure. The residents of Gracias a Dios, who are presumed to be invested in Sandinista politics either by ideological interpellation or pragmatic self-interest, are revealed to be neither deceived nor blindly hopeful. This article argues that the populist promise opens an ambivalent space that animates aspirations and preserves possibility even when experience suggests otherwise. The regime's capacity to foster possibility in lieu of probability is dependent on punctuating everyday life with irregularly timed interventions and on transforming partisan belonging into a stopgap between promise and outcome.
Book Reviews
Authors: Carlson Rebecca , Saglam Erol 
Published: March 2023

Adriana Petryna, Horizon Work: At the Edges of Knowledge in an Age of Runaway Climate Change, Princeton, NJ: Princeton University Press, pp. 224, 2022
Sertaç Sehlikoglu, Working Out Desire: Women, Sport, and Self-Making in Istanbul, Syracuse, NY: Syracuse University Press, pp. 339, 2021
Aesthetic politics in contemporary India
Authors: Simpson Nikita 
Published: March 2023

Michiel Baas. Muscular India: Masculinity, mobility & the new middle class. New Delhi: Context, 2020.
Alice Tilche. Adivasi art and activism: Curation in a nationalist age. Seattle: University of Washington Press, 2022.
Sanderien Verstappen. New lives in Anand: Building a Muslim hub in Western India. Seattle: University of Washington Press, 2022.
A Preliminary Comparison of the Methylome and Transcriptome from the Prefrontal Cortex Across Alzheimer’s Disease and Lewy Body Dementia
Authors: Fisher Daniel W. , Tulloch Jessica , Yu Chang-En , Tsuang Debby 
Published: March 2023

Background: Pathological amyloid-β and α-synuclein are associated with a spectrum of related dementias, ranging from Alzheimer’s disease (AD) and dementia with Lewy bodies (DLB) to Parkinson disease dementia (PDD). While these diseases share clinical and pathological features, they also have unique patterns of pathology. However, epigenetic factors that contribute to these pathological differences remain unknown. Objective: In this preliminary study, we explore differences in DNA methylation and transcription in five neuropathologically defined groups: cognitively unimpaired controls, AD, pure DLB, DLB with concomitant AD (DLBAD), and PDD. Methods: We employed an Illumina Infinium 850k array and RNA-seq to quantify these differences in DNA methylation and transcription, respectively. We then used Weighted Gene Co-Network Expression Analysis (WGCNA) to determine transcriptional modules and correlated these with DNA methylation. Results: We found that PDD was transcriptionally unique and correlated with an unexpected hypomethylation pattern compared to the other dementias and controls. Surprisingly, differences between PDD and DLB were especially notable with 197 differentially methylated regions. WGCNA yielded numerous modules associated with controls and the four dementias: one module was associated with transcriptional differences between controls and all the dementias as well as having significant overlap with differentially methylated probes. Functional enrichment demonstrated that this module was associated with responses to oxidative stress. Conclusion: Future work that extends these joint DNA methylation and transcription analyses will be critical to better understanding of differences that contribute to varying clinical presentation across dementias.
Postmortem Cerebellar Volume Is Not Reduced in Essential Tremor: A Comparison with Multiple System Atrophy and Controls
Authors: Tremblay Cécilia , Serrano Geidy E. , Dunckley Nathaniel , Zhang Nan , Fiock Kimberly L. , Adler Charles H. , Driver-Dunckley Erika , Mehta Shyamal H. , Shill Holly A. , Beach Thomas G. 
Published: March 2023

Background: Essential tremor (ET) is a common movement disorder in which cerebellar microscopic and volume alterations have been repeatedly reported although with disagreement between studies. However, pronounced heterogeneity was found with regard to cerebellar volume alterations. Objective: This study aimed to assess postmortem cerebellar volume in subjects with or without ET, as compared with subjects with multiple system atrophy (MSA), a well-established cerebellar neurodegeneration. Methods: Cases with ET ( n = 29), MSA ( n = 7), and non-demented control cases without any movement disorder ( n = 22) were selected from the Arizona Study of Aging and Neurodegenerative Disorders (AZSAND), a longitudinal clinicopathological study with annual research-dedicated clinical assessments by neuropsychologists, subspecialist movement disorders, and cognitive/behavioral neurologists, with comprehensive neuropathological examinations after death. Group comparisons were controlled for common age-related neurodegenerative and cerebrovascular pathologies. Cerebellar volumes were calculated using digital images of slices taken at the time of autopsy, immediately after brain removal and before fixation. Results: Cerebellar volume was not reduced in ET subjects compared to controls. The two groups did not differ in terms of incidental cerebrovascular and Alzheimer’s disease neuropathology. In contrast, cerebellar volume was significantly reduced in subjects with MSA when compared to ET and control subjects. Conclusion: In a well-characterized cohort, postmortem cerebellar volume measurements suggest that there are no volume alterations in ET when compared to controls, in contrast to significant cerebellar atrophy in subjects with MSA.