bluuebunny/crossref_metadata_2025 huggingface dataset:
SURİYELİ GÖÇÜNÜN TÜRKİYE’DEKİ EVLİLİK VE BOŞANMAYA ETKİSİ
Authors: MERCAN Murat Anıl , CEBECİ Ali Fehim , KARADUMAN Hasan Ağan , BARLIN Hande , BEĞEN Nazire
Published: June 2023

Suriye İç Savaşının 2011 yılında başlamasından sonra Suriyeliler Türkiye’ye yoğun bir şekilde göç etmişlerdir. Suriyelilerin göç hareketinin ev sahibi ülkeler üzerindeki etkileri akademik yazında yoğun olarak incelenen konular arasındadır. Bahse konu niceliksel yöntem kullanan çalışmaların önemli bir kısmı Suriyeli göçünün ekonomik etkilerine odaklanmaktadır. Suriyelilerin göçünün evlilik ve boşanma üzerindeki etkisi, niceliksel yöntemler kullanılarak şimdiye kadar hiç incelenmemiştir. Literatürdeki bu açığı kapatmak amacıyla çalışmada 2008-2020 yılları arasında Türkiye’deki illerde Suriyeli sayısındaki değişimlerin, Türkiye’deki evlilik ve boşanmalar üzerindeki etkilerini incelenmektir. Analiz için akademik yazında nedenselliği ölçmeye yönelik sıklıkla tercih edilen Farkların Farkı yöntemi kullanılmıştır. Araştırmanın sonuçları, 25-29 ve 30-34 yaşlarındaki yerli erkeklerin yanı sıra 20-24, 25-29, 40-44 ve 45-49 yaşlarındaki yerli kadınların evlilik oranlarının Suriyeli akınından etkilendiğini ortaya koymaktadır. 20-24 yaş arası yerli kadınların ve 25-29 yaş arası yerli erkeklerin, diğer gruplardaki yaşıtlarına göre daha fazla etkilendikleri görülmektedir. Ayrıca, 20-24 ve 60 ve üstü yaş gruplarındaki erkeklerin evlenme hızında düşüş olduğu tespit edilmiştir. Öte yandan, Suriyeli akınının Türkiye’de hem erkeklerde hem de kadınlarda 25-29 ve 30-34 yaş grupları arasında; erkeklerde 35-39 ve kadınlarda 20-24 yaş arasındaki bireylerin boşanma oranlarını artırdığı bulunmuştur.
Antiballistic material, testing, and procedures of curved-layered objects: A systematic review and current milestone
Authors: Maulana Fattah , Prabowo Aditya Rio , Ridwan Ridwan , Ubaidillah Ubaidillah , Ariawan Dody , Sohn Jung Min , Muhayat Nurul , Tjahjana Dominicus Danardono Dwi Prija , Do Quang Thang
Published: June 2023

Antiballistics are used as personal protective equipment required by military and police personnel. They have been mentioned frequently in recent decades due to the increasing cases of war. Several studies have reviewed the development of antiballistic technology. However, there needs to be more discussion on and systematic reviews of the current milestones of antiballistic materials, testing, and procedures. In addition, compared to other fields, antiballistic studies are rarely carried out by public researchers because research on weapons is still a sensitive topic. Researchers who want to discuss antiballistics must cooperate with the country's defense and security agencies. This article aims to present a summary on and the development of scientific research on the theoretical concept of impact, the experimental approach for ballistic tests on advanced materials, the idealization of ballistic tests in computational mechanic simulations, and milestones of technical apparatus for ballistic performance measurement, over a period of more than 500 years. Thus, this analysis makes an excellent contribution to the field of antiballistics. This article review is based on hundreds of international journals and websites that are still active and can be accounted for legally. The results show that research related to antiballistics will continue to grow yearly.
Simulation evaluation of underwater robot structure and control system based on ADAMS
Authors: Tang Donglin , Li Long
Published: June 2023

The twenty-first century is the century of marine resources. The ocean is a treasure of biological resources, energy, water resources and mineral resources, and it would gradually become the “second space” of mankind. In the next few years, it would be more and more relevant to human life. Many scholars have realized the importance of the ocean and began to vigorously develop and use the ocean. Underwater robot is a means for human beings to explore and develop the ocean, and it would be widely used in this field. The development and promotion of underwater vehicles are of great significance to resource development, economic development, and national security. With the increasing shortage of land resources, the development and utilization of marine resources have received increasing attention. The direct exploitation of marine resources by humans would have adverse effects, so the underwater robot technology has developed rapidly in recent years. However, at present, most underwater robots are driven by electric turbines. The underwater working environment requires that the underwater motor has good sealing performance, so its structure is complex and expensive, and it is rarely used in ordinary underwater operations. In recent years, intelligent robots have been used more and more, but because of the complexity and uncertainty of the underwater working environment, there are many uncertain factors. Therefore, it is very meaningful to carry out stability control for it. The research results showed that the displacement, stability, and other corresponding test curves of each component can be obtained by establishing a simple model with software and through ADAMS (Automatic Dynamic Analysis of Mechanical Systems) simulation analysis. This can simulate the movement of real objects in the real environment and find the existing problems, so as to provide a reference for the actual underwater robot design. In this way, the development cycle and production costs can be reduced. This article analyzed the structure and control system of the underwater vehicle based on ADAMS simulation. The results showed that the dynamic stability of the underwater vehicle based on ADAMS simulation analysis was improved by 4.67% compared with the underwater vehicle before optimization.
The Family Effect: A Compass for Research on Heterogeneity of Family Businesses in Embedded Contexts
Authors: Labaki Rania , Mustafa Michael J.
Published: June 2023

We highlight recent research on the intertwinement of family, entrepreneurship, and strategy with a particular focus on entrepreneurial and business families. Our efforts lead us to untangle the nodal points by suggesting an interpretative framework of their main dimensions, motivators, and impacts. The family logic transcends entrepreneurial, strategic, and psychological decisions and dimensions by shaping in different ways their processes from the motivations to the outcomes. It appears, therefore, as an essential unit of study that ought to inform future research of family businesses in embedded contexts. Towards this direction, we suggest a series of theoretical and empirical route(s) along with methodological recommendations.
How Brexit Damaged the United Kingdom and the City of London
Authors: Ryan John Martin Timothy
Published: June 2023

This paper examines the economic cost of Brexit for the City of London. Even though the Covid pandemic may have delayed some plans for relocations by financial firms from London to the EU, the EU’s finance hubs are growing. Paris has become the bloc’s top trading hub, while Frankfurt, Dublin and Amsterdam are also emerging as hubs for different financial services specialisms. There were three drivers behind the UK government’s stance on Brexit which have been largely detrimental to City of London interests: First, Getting Brexit Done by concluding a boilerplate agreement on goods, while neglecting financial services; second, leaving the single market and ending freedom of movement making a deal on financial services impossible, and third, the false and arrogant mantra that ‘the EU needed the City more than the City needed the EU’. Prime Ministers Johnson, Truss and Sunak have led the UK into further self-inflicted economic and political decline and regulatory uncertainty. Brexit will over the next few years have a negative impact on jobs and tax receipts. The City of London will have to adapt to the harsh realities of a hard Brexit, perennial tensions with Brussels and growing competition from European financial centres and from New York.
Preventing fiber–fiber adhesion of lignin–cellulose precursors and carbon fibers with spin finish application
Authors: Bengtsson Jenny , Bengtsson Andreas , Ulmefors Hanna , Sedin Maria , Jedvert Kerstin
Published: June 2023

Adhesion of fibers within a spun tow, including carbon fibers and precursors, is undesirable as it may interrupt the manufacturing process and entail inferior fiber properties. In this work, softwood kraft lignin was used together with a dissolving pulp to spin carbon fiber precursors. Lignin–cellulose precursors have previously been found to be prone to fiber fusion, both post-spinning and during carbon fiber conversion. In this study, the efficiency of applying different kinds of spin finishes, with respect to rendering separable precursors and carbon fibers, has been investigated. It was found that applying a cationic surfactant, and to a similar extent a nonionic surfactant, resulted in well separated lignin–cellulose precursor tows. Furthermore, the fiber separability after carbon fiber conversion was evaluated, and notably, precursors treated with a silicone-based spin finish generated the most well-separated carbon fibers. The underlying mechanism of fiber fusion post-spinning and converted carbon fibers is discussed.
A TRANSFORMING ATTITUDE TOWARDS THE CLIENT IN SOCIAL WORK: THE PRAXIS OF THE ANTIOCH SCHOOL OF ANTHROPOLOGY AND THEOLOGY
Authors: Gūtmane Skaidrīte
Published: June 2023

This article is an analysis of the historical roots and ethical semantics of the social work concept ‘a marginal person, a client’ (the Greek words ξένος, ksenos and αςτος, astos). The question is relevant in modern social work in relation to the concept of ‘strange’ or ‘marginal’. The article analyses how the concepts ‘strange’, ‘other’ and marginal’ have re-entered the modern world from the Ancient world, as they were used in Ancient Syria (in the fourth century), Greece, and Medieval Europe. However, nowadays in social work theory they should be described anew using the discourses of social work and anthropology. The article explores the question of how to communicate with the ‘other’ or marginal person, based on reciprocity and internal solidarity.
TARPINSTITUCINIS BENDRADARBIAVIMAS ATVEJO VADYBOS PROCESE, TEIKIANT PAGALBĄ SOCIALINĘ RIZIKĄ PATIRIANČIOMS ŠEIMOMS
Authors: Nikolajenko Edita , Raudytė Viktorija
Published: June 2023

In this article, we analyse the process of case management in the context of inter-institutional cooperation while providing aid to families at social risk in Lithuania. According to the theoretical framework, effective inter-institutional cooperation depends directly on the communication practice, and is oriented towards certain strategic goals, building a more effective system of social services, and improving opportunities for aid for families. In order to argue for the importance of inter-institutional cooperation as a significant aid tool for families at social risk, it is appropriate to examine the experiences and expectations of the participants in the process related to the management of interdependency between organisations and involvement in the exchange of necessary resources. With the help of analyses of the practice of inter-institutional cooperation in the case management process, we attempt to emphasise the essential factors in and obstacles to effective inter-institutional cooperation, assembling aid providers, planning, providing aid to the child and (or) family, and cooperating with government and local authority institutions, and other organisations.
Finansal Okuryazarlık Düzeylerinin Belirlenmesine Yönelik Bir Araştırma: Dicle Üniversitesi Örneği
Authors: YÜRÜK Muhammed Fatih
Published: June 2023

Finansal okuryazarlık 2008 küresel ekonomik kriz sonrasında uluslararası literatüre girmiş ve günümüz dünyasında önemini artıran bir kavramdır. Bireylerin yaşam kalitesini artırabilmeleri için finansal bilgiye sahip olmaları gerekmektedir. Karmaşıklaşan finans dünyasında çok ölçütlü seçenekler arasından doğruyu seçmek önemli bir durumdur. Doğru kararı verebilmek için finansal okuryazarlık düzeyinin yeterli olması gerekmektedir. Özellikle üniversite öğrencilerinin finansal okuryazarlık seviyesinin yüksek olması ülkenin de ekonomik anlamda güçlü olmasına katkı sağlayacaktır. Bu çalışmada da Dicle Üniversitesi öğrencileri üzerinde finansal okuryazarlık seviyesi ölçülmeye çalışılmıştır. Dicle üniversitesi bünyesinde bulunan toplam 13 fakülte ve yüksekokulun 708 öğrencisine anket uygulanmıştır. Kadın ve erkek öğrencilerin genel başarı puanları karşılaştırıldığında erkek öğrencilerin kadın öğrencilere göre finansal okuryazarlık düzeylerinin daha fazla olduğu belirlenmiştir.
Individualization of Training Based on Sprint Force-Velocity Profiles: A Conceptual Framework for Biomechanical and Technical Training Recommendations
Authors: Hicks Dylan S. , Drummond Claire , Williams Kym J. , Pickering Craig , van den Tillaar Roland
Published: June 2023

The purpose of this article is to provide practitioners with a system to categorize and individualize training prescription from sprint force-velocity (F-v) profiles to enhance performance in team and individual sport athletes. Despite F-v variables presenting key information about the underpinning mechanisms contributing to sprint performance, the overall data interpretation may be limited for the practitioner to implement applied training interventions compared with the researcher. Therefore, this article provides a conceptual framework for appropriate training prescriptions based on individual biomechanical and technical characteristics contributing to sprint performance.
Development of Embrittlement Trend Equations for WWER-440 RPV Materials
Authors: Brumovský Milan
Published: June 2023

This paper describes a short history of the development of formulas for the prediction of transition temperature shift ΔTk for material 15Kh2MFA(A) type (base metal and weld metal) used for the manufacturing of reactor pressure vessels for WWER-440-type reactors. Based on updated databases of test data from surveillance specimen programs of WWER-440/V-213C models manufactured by SKODA JS, new embrittlement trend equations for Charpy impact transition temperature shifts ΔTk as well as fracture toughness reference temperature shifts ΔT0 were determined and included into normative documentation.
Methodology for Adjusting Reactor Pressure Vessel Embrittlement Predictions Using Heat-Specific Surveillance Data
Authors: Hall J. Brian , Mays Ben E. , Simpson Derek A.
Published: June 2023

An approach is presented for adjusting a generic embrittlement trend curve (ETC) for trend and bias differences to measured reactor pressure vessel steel heat-specific Charpy embrittlement shift data. With heat-specific embrittlement measurements, prediction certainty is increased; therefore, the uncertainty term of the ETC can be reduced. A technical basis is presented quantifying product-form-specific uncertainty terms when heat-specific measurements are available using the ASTM E900-15 embrittlement database. For steel heats irradiated in different plants, additional uncertainty was observed with an associated increased uncertainty term developed. The approach depends on the number of heat-specific embrittlement measurements available.
Improved Upper-Shelf Energy Prediction Model and Implications for the U.S. PWR Fleet
Authors: Hall J. Brian , Hall Gordon Z. , Long Elliot J.
Published: June 2023

U.S. 10 CFR Part 50, Appendix G, “Fracture Toughness Requirements,” specifies that vessel materials must maintain a Charpy upper-shelf energy (USE) of no less than 68 J (50 ft-lb) throughout the life of the vessel. If the USE is projected to fall below 68 J, a fracture-mechanics equivalent-margin analysis (EMA) must be performed according to ASME Section XI, Appendix K to demonstrate the margins of safety against fracture that are equivalent to those required by ASME Section XI, Appendix G. Irradiated USE is typically calculated using Regulatory Guide 1.99, Revision 2 methodology, which has been the subject of an adequacy review by the U.S. Nuclear Regulatory Commission. Modern improved USE prediction models have been developed and published. This paper considers improved USE predictions, high-fluence fracture-toughness data, and completed EMAs and draws implications for the U.S. pressurized water reactor fleet considering extended operation.
On High-Fluence Irradiation Hardening of Nine RPV Surveillance Steels in the UCSB ATR-2 Experiment: Implications for Extended-Life Embrittlement Predictions
Authors: Nanstad Randy K. , Almirall Nathan , Wells Peter , Server William L. , Sokolov Mikhail A. , Long Elliot J. , Odette G. Robert
Published: June 2023

Nine archival reactor pressure vessel (RPV) surveillance steels from commercial nuclear power plants were irradiated in the University of California, Santa Barbara Advanced Test Reactor 2 (ATR-2) experiment to evaluate irradiation embrittlement under low-flux surveillance capsule versus higher flux test reactor (ATR-2) conditions. The postirradiation measurements of irradiation hardening, measured as increases in yield stress (Δσy), and corresponding conversions of Δσy to Charpy V-notch 41-J transition temperature shifts (ΔTc) are compared with various embrittlement trend curve (ETC) model predictions for the nine steels. Tensile and converted shear punch and microhardness measurements of Δσy generally show a continuing increase between intermediate and high ATR-2 fluences. The Eason-Odette-Nanstad-Yamamoto and ASTM E900 ETC models underpredict embrittlement at the ATR-2 irradiation condition: irradiation temperature (Ti) of 292°C, neutron fluence (ϕt) of 1.4 × 1020 n/cm2 (E > 1 MeV), and neutron flux (ϕ) of 3.68 × 1012 n/cm2-s. On average, the French FIS and Japanese JAEC ETCs slightly overpredict the ATR-2 data. The increase in Δσy with higher fluence is primarily due to Ni-Mn-Si precipitates, which slowly evolve in both nearly copper-free and copper-bearing steels. Finally, a new Odette-Wells-Almirall-Yamamoto embrittlement model is shown that yields good predictions for the nine steels at high fluences (ϕt > 5.5 × 1019 n/cm2).
A transcription‐independent mechanism determines rapid periodic fluctuations of BRCA1 expression
Authors: Nie Chen , Zhou Xiao Albert , Zhou Jiadong , Liu Zelin , Gu Yangyang , Liu Wanchang , Zhan Jun , Li Shiwei , Xiong Yundong , Zhou Mei , Shen Qinjian , Wang Weibin , Yang Ence , Wang Jiadong
Published: June 2023

BRCA1 expression is highly regulated to prevent genomic instability and tumorigenesis. Dysregulation of BRCA1 expression correlates closely with sporadic basal‐like breast cancer and ovarian cancer. The most significant characteristic of BRCA1 regulation is periodic expression fluctuation throughout the cell cycle, which is important for the orderly progression of different DNA repair pathways throughout the various cell cycle phases and for further genomic stability. However, the underlying mechanism driving this phenomenon is poorly understood. Here, we demonstrate that RBM10‐mediated RNA alternative splicing coupled to nonsense‐mediated mRNA decay (AS‐NMD), rather than transcription, determines the periodic fluctuations in G1/S‐phase BRCA1 expression. Furthermore, AS‐NMD broadly regulates the expression of period genes, such as DNA replication‐related genes, in an uneconomical but more rapid manner. In summary, we identified an unexpected posttranscriptional mechanism distinct from canonical processes that mediates the rapid regulation of BRCA1 as well as other period gene expression during the G1/S‐phase transition and provided insights into potential targets for cancer therapy.
Precipitation of lignin from softwood black liquor: An investigation of the equilibrium and molecular properties of lignin
Authors: Zhu Weizhen , Theliander Hans
Published: June 2023

Extracting lignin from black liquor is an attractive option in modern pulp mills as a unit process for a combined biorefinery. The lignin obtained can be utilized as solid fuel or other high-value added products. The precipitation equilibrium of kraft lignin from softwood black liquor was studied in this work. It was found that with decreasing pH and temperature, or increasing ion strength, the solid yield increases. Moreover, precipitated softwood kraft lignin has a higher molecular weight and contains lower amounts of carbohydrates and phenolic groups than lignin precipitated from mixed hardwood/softwood black liquor. The content of methoxyl groups in softwood kraft lignin was found to decrease with increasing precipitation yield. An empirical model for estimating the precipitation yield of lignin was proposed and evaluated.
Binderless materials obtained by thermo-compressive processing of lignocellulosic fibers: A comprehensive review
Authors: Pintiaux Thibaud , Viet David , Vandenbossche Virginie , Rigal Luc , Rouilly Antoine
Published: June 2023

As the worldwide demand for fuels and materials increases, fossil resources are decreasing and global warming is a concern, and thus the need for alternative solutions is high. In the industries of furniture and housing, particleboards are interesting materials, as they reutilize wastes from other industries (wood, agriculture) although they also rely on chemical binders that are petroleum-based and toxic. A very promising alternative is then clearly identified in finding ways to produce binderless boards and associated materials. This review considers the state of the art in the field of binderless board production, and other processes making it possible to turn raw plant fibers into structural materials without using any external chemistry. The mechanical properties and water resistance are collected and compared. Identified chemistry changes occurring during the thermo-compressive process are discussed with an aim towards understanding of the mechanisms of cohesion.
Antibacterial modification of cellulosic materials
Authors: Liu Ying , Ren Xuehong , Liang Jie
Published: June 2023

The proliferation of bacteria on the surfaces of cellulosic materials during their use and storage can have negative effects on the materials themselves and on consumers. People’s demands for materials with antibacterial properties have been satisfied in recent years because of the emergence of various antibacterial compounds. This paper reviews recent research and development progress in antibacterial modification of cellulosic fibers using various biocides such as N-halamines, quaternary ammonium salts, chitosan, triclosan, and nanoparticles composed of noble metals and metal oxides. Antibacterial mechanisms and treating methods for antibacterial cellulosic materials are also involved in this paper.
Hydrodeoxygenation of phenol as a model compound by Ni2P/HBeta-SBA-15,
Authors: Jiang Jiao , Wang Shurong , Li Jin , Cao Yang , Zhou Shiyun , Gao Mingyuan , Tang Boheng
Published: June 2023

The stable silica sieve-based HBeta-SBA-15 catalyst-carrier was successfully prepared by a hydrothermal synthesis method, and then Ni2P/HBeta-SBA-15 new hydrodeoxygenation catalyst was successfully loaded by the equal volume impregnation method. It was characterized by X-ray diffraction (XRD), N2 adsorption-desorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and pyrolysis-infrared (Py-IR) methods. The results showed that SBA-15 was successfully immobilized on HBeta to form a microporous and mesoporous composite carrier. The introduction of SBA-15 not only increased the specific surface area of HBeta-SBA-15, but also reduced its acidity. After loading the active metal component Ni2P, the structure of the catalyst has not changed much. Hydrodeoxygenation (HDO) of phenol model compounds over Ni2P/HBeta-SBA-15 catalyst was studied in water. The response surface analysis showed that the conversion of phenol was 84.4% and the selectivity of cyclohexane was 94.2% at a lower temperature of 240 °C. The effect of reaction conditions on the yield of cyclohexane was as follows: the reaction temperature > the amount of hydrogen > the amount of catalyst > the reaction time. This study provides theoretical guidance for upgrading biomass pyrolysis oil to green fuel through hydrodeoxygenation.
Recovery of an agro-industrial vinasse by adsorption on different wood materials: Parametric study at laboratory scale
Authors: Daragon Guillaume , Trouvé Gwenaëlle , Schönnenbeck Cornelius , Leyssens Gontrand
Published: June 2023

Three types of biomasses (miscanthus, spruce, and a mixture of different woodchips species) were tested as low-cost adsorption media for an industrial agro-industrial effluent, typically a vinasse. Influences of effluent dilution, working temperature, and time duration were studied. Kinetic modelling studies of adsorption were proposed. Ratios of adsorption at ambient temperature and without dilution expressed in g of dry vinasse per g of dry biomass were 1.0, 0.85, and 0.65 for miscanthus, woodchips mixture, and spruce, respectively. An increase of the temperature from 10 °C to 50 °C led to a decrease of the vinasse viscosity and favored its penetration in the biomasses. Maximal adsorbance of dry matter of vinasse was obtained at 50 °C for a vinasse viscosity of 20 mPas. Whatever the experimental conditions required during adsorption processes, miscanthus showed the best affinity for the vinasse. Pseudo-second order and intra-particle diffusion model well described the adsorption process. This study indicates that conventional biomasses could be used as natural low-cost adsorbent for by-products such as vinasse.
EXPRESSION OF PROGRAMMED CELL DEATH RECEPTOR IN ENDOMETRIAL CANCER PATIENTS WITH METABOLIC DISORDERS
Authors: Kuzmenko O.V. , Sorochan P.P. , Gromakova I.S. , Shevtsov V.G. , Ivanenko M.O. , Polozova M.V.
Published: June 2023

Aim: To study the expression of the programmed cell death receptor (PD-1) and its ligand (PD-L1) by immunocompetent cells in endometrial cancer patients with metabolic disorders. Materials and Methods: Populations and subpopulations of lymphocytes were analyzed by flow cytometry. Antibodies against CD279 were used to detect PD-1 on the CD4+ and CD8+ T cells. Antibodies against CD14 and CD274 were used to detect PD-L1 on monocytes. Results: In patients with severe metabolic disorders, the expression of PD-1 on CD8+ and CD4+ lymphocytes and the expression of the corresponding PD-L1 on CD14+ cells before treatment and after radiation therapy were higher than in the control group. Conclusion: Theincreased expression of PD-1 and PD-L1 receptors by immunocompetent cells can be considered a new prognostic marker in endometrial cancer patients with morbid obesity.
Algorithms to calculate supersonic flow about a ring wing launch vehicle
Authors:   Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine, Timoshenko V.I. , Halynskyi V.P. ,   Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine
Published: June 2023

This paper presents algorithms to calculate supersonic flow about a prospective ring wing launch vehicle by the marching method and the relaxation method. The feature of the algorithms is the introduction of two computational subregions in the ring wing zone over the rocket airframe. In the marching algorithm, the computation region is reconstructed according to the position of the marching cross-section relative to the leading and trailing edge of the ring wing. When it finds itself at the leading edge of the ring wing, the computational region is split into a lower subregion between the rocket airframe and the downstream face of the ring wing and an upper subregion between the upstream face of the ring wing and the bow shock front. When the marching cross-section finds itself at the trailing edge of the ring wing, the lower and the upper computational subregions are merged into a single computational region. Based on the marching algorithm and using the authors’ rocket flow calculation program, software is developed for a fast numerical calculation of supersonic flow about ring wing rockets. For a particular ring wing rocket configuration, the paper presents the results of comparative calculations of supersonic flow about the rocket in the form of gas-dynamic parameter isolines in the flow field and the pressure distribution over the rocket airframe and the ring wing. The results for the marching method and the relaxation method are compared. It is shown that the ring wing is responsible for an undulatory pressure distribution between the rocket airframe and the downstream face of the ring wing. The marching method simulates the flow pattern between the rocket airframe and the downstream face of the ring wing more adequately, and its computation time is two orders of magnitude shorter than that of the relaxation method. The relaxation method should be used in the case of subsonic flows between the rocket airframe and the downstream face of the ring wing. The algorithm and software developed are recommended for parametric calculations of supersonic flow about ring wing rockets.
Reducing the dimension of a nonlinear dynamic system to simulate a multi-walled nanotube
Authors:   A. Pidgorny Institute of Mechanical Engineering Problems of the National Academy of Sciences of Ukraine, Avramov K.V. , Biblik I.V. ,   A. Pidgorny Institute of Mechanical Engineering Problems of the National Academy of Sciences of Ukraine, Hrebennik I.V. ,   Kharkiv National University of Radio Electronics, Urniaieva I.A. ,   Kharkiv National University of Radio Electronics
Published: June 2023

A system of nonlinear partial differential equations is derived to describe the vibrations of a multi-walled nanotube. The system reduces to a nonlinear dynamic system with а large number of degrees of freedom (DOFs). To reduce its dimension, the nonlinear modal analysis method is used to give 2-DOF dynamic system, which is studied by the asymptotic multiple scale method. This gives a system of modulation equations, whose fixed points describe the free vibrations of the nanotube. The fixed points are described by nonlinear algebraic equations, whose solutions are given on a backbone curve. Use is made of the Sanders–Koiter shell model to describe the nonlinear deformation of the nanotube and Hook’s nonlocal anisotropic law to simulate its vibrations. Notice that the elastic constants of the nanotube walls differ. The nanotube model is a system of nonlinear ordinary differential equations, which is obtained by applying the weighed residuals method to the nonlinear partial equations. Three types of nonlinearities are accounted for in the nanotube model. First, the Van der Waals forces are nonlinear functions of the radial displacements. Second, the displacements of the nanotube walls are assumed to be moderate, which is described by a geometrically nonlinear model. Third, since the resultant forces are nonlinear functions of the displacements, the use of natural boundary conditions in the weighted residuals method results in additional nonlinear terms. A finite-DOF nonlinear dynamical system is derived. The free nonlinear vibrations of the nanotube are analyzed. The calculated results are shown on a backbone curve.
EDDY CURRENTS CALCULATION IN A THREE-PHASE INDUCTION-TYPE HEAT GENERATOR USING THE SECONDARY SOURCES METHOD. CURRENT MODE
Authors:   Institute of Electrodynamics National Academy of Sciences of Ukraine, Peremohy Ave., 56, Kyiv, 03057, Ukraine, Zhyltsov A.V. , Zaiets N.A. ,   National University of Life and Environmental Sciences of Ukraine, Heroiv Oborony Str.15, Kyiv, 03041, Ukraine, Bereziuk A.O. ,   National University of Life and Environmental Sciences of Ukraine, Heroiv Oborony Str.15, Kyiv, 03041, Ukraine, Gai O.V. ,   National University of Life and Environmental Sciences of Ukraine, Heroiv Oborony Str.15, Kyiv, 03041, Ukraine, Lyktei V.V. ,   National University of Life and Environmental Sciences of Ukraine, Heroiv Oborony Str.15, Kyiv, 03041, Ukraine
Published: June 2023

Using the secondary sources method, a three-dimensional mathematical model of a heat induction type generator was devel-oped when it is powered by a three-phase current source with a load in the form of non-connected ferromagnetic conducting pipes, taking into account the symmetrical distribution of the densities of the electromagnetic field secondary sources. The analysis of the secondary sources distribution of the electromagnetic field and heat losses in the loaded one allowed us to conclude about the possibility of neglecting the components of eddy current densities and magnetization current densities along the symmetry axis of the pipes and in the radial direction, which reduces the number of secondary source densities sought from six to three. It is shown that for the analysis of electromagnetic processes in heat generators of this type, it is permissible to assume the uniformity of the secondary sources density distribution in all pipes, which, when using the method of secondary sources, makes it possible to reduce the search area to one ferromagnetic base pipe. References 8, figures 3, table 1.
Application of spectral decomposition to establish inequalities for operators
Authors: Bilichenko R. , Zhir S.
Published: June 2023

We give specific examples of the spectral decomposition of self-adjoint operators in application to establish sharp inequalities for their powers.
On the algebra of derivations of some nilpotent Leibniz algebras
Authors: Kurdachenko L.A. , Semko M.M. , Yashchuk V.S.
Published: June 2023

We describe the algebra of derivations of some nilpotent Leibniz algebra, having dimensionality 3.
KEGIATAN KURENAH SEBAGAI MEDIA PROMOSI LAYANAN ANAK
Authors: Fitriyanti Anjela , Primadesi Yona
Published: June 2023

This study aims to describe kurenah activities as a media for promoting child services at the Padang Panjang City Library and Archives Service. This study uses descriptive qualitative research methods, with data collection techniques namely observation, interviews and documentation. The data analyst uses Miles and Huberman's model theory, namely data reduction, data presentation and verification. The results showed that kurenah activities as a media for promoting children's services at the Padang Panjang City Library and Archives Service could make children and parents visit children's services by: (a) attracting the attention of children and parents supported by services. children's librarians, children's collections, children's service facilities, and service conditions; (b) generating interest (interest) of children and parents is carried out by holding supporting activities, such as the use of promotional media, and giving rewards; (c) desire (desire) arises as evidenced by children and parents asking when the activities are carried out and benefits obtained from participating in activities; (d) action obtained from kurenah activities as a media for promoting child services, namely increasing the number of visits to children's services and children who have never visited the library in the end visited the library.Penelitian ini bermaksud untuk mendeskripsikan kegiatan kurenah sebagai media promosi layanan anak di Dinas Perpustakaan dan Kearsipan Kota Padang Panjang. Penelitian ini menggunakan metode kualitatif deskriptif, dengan teknik pengumpulan data yaitu observasi, wawancara dan dokumentasi. Analis data menggunakan teori Miles dan Huberman yaitu reduksi data, penyajian data dan verifikasi. Hasil penelitian menunjukkan bahwa kegiatan kurenah sebagai media promosi layanan anak di Dinas perpustakaan dan kearsipan Kota Padang Panjang dapat membuat anak-anak dan orang tua berkunjung ke layanan anak dengan: (a) menarik perhatian (attention) anak-anak dan orang tua didukung dengan pelayanan pustakawan anak, koleksi anak, fasilitas layanan anak, dan kondisi layanan; (b) memunculkan ketertarikan (interest) anak-anak dan orang tua dilakukan dengan mengadakan kegiatan penunjang, seperti penggunaan media promosi, dan pemberian reward;(c) keinginan (desire) timbul dibuktikan oleh anak-anak dan orang tua menanyakan kapan pelaksanaan kegiatan dan manfaat yang diperoleh jika mengikuti kegiatan; (d) tindakan (action) di peroleh dari kegiatan kurenah sebagai media promosi layanan anak yaitu meningkatnya jumlah kunjungan pada layanan anak dan anak-anak yang tidak pernah mengunjungi perpustakaan pada akhirnya mengunjungi perpustakaan.
ANALISIS PROGRAM KEGIATAN PENDIDIKAN PEMUSTAKA (USER EDUCATION) BAGI MAHASISWA BARU DALAM MEMANFAATKAN LAYANAN PERPUSTAKAAN
Authors: Zuraidah Zuraidah , Pakpahan Elysa Fitri
Published: June 2023

The purpose of this study is to analyze how user education has been carried out, and how to use the service as well as what obstacles are encountered in implementing user education in the Padangsidimpuan IAIN Library Center environment to be studied in research. This type of research is qualitative with a descriptive approach by presenting the data obtained by paying attention to the translation sentence by sentence according to the information obtained from the results of interviews, observations and documentation. The results obtained after carrying out research and analysis of the data obtained are; librarian education carried out at UPT Padangsidimpuan IAIN Library Center until the time the research was conducted was in the good category. Utilization of library services increased in the range of 40.9% after librarian education was carried out for new students. The constraints faced when carrying out librarian education included; direct visits cannot be enforced for students because the number of students is not proportional to the availability of time. Users cannot immediately browse non-printed collections because of ma'had regulations which do not allow android for new students while living in the dormitory. Inadequate infrastructure and insufficient funding for activities are separate obstacles that should be taken into consideration.Tujuan penelitian ini menganalisis bagaimana pendidikan pemustaka yang telah dilakukan, dan bagaimana pemanfaatan layanan sekaligus apa kendala yang dihadapi dalam pelaksanaan pendidikan pemustaka di lingkungan UPT Pusat Perpustakaan IAIN Padangsidimpuan menjadi kajian dalam penelitian. Jenis penelitian ini kualitatif dengan pendekatan deskriptif dengan menyajikan data yang diperoleh dengan memperhatikan penjabaran kalimat demi kalimat yang sesuai dengan informasi yang diperoleh dari hasil wawancara, observasi serta dokumentasi. Hasil yang diperoleh setelah melaksanakan penelitian dan analisis terhadap data yang diperoleh yaitu; pendidikan pemustaka yang dilaksanakan di UPT Pusat Perpustakaan IAIN Padangsidimpuan sampai pada saat penelitian dilakukan berada pada kategori baik.  Pemanfaatan layanan perpustakaan meningkat pada rentang 40,9 % setelah dilaksanakan pendidikan pemustaka bagi mahasiswa baru, Kendala yang dihadapi pada saat melaksanakan pendidikan pemustaka antara lain; tidak dapat diberlakukannya kunjungan langsung bagi mahasiswa disebabkan jumlah mahasiswa tidak sebanding dengan kesediaan waktu. User tidak dapat serta merta menelusur koleksi non tercetak karena peraturan ma’had yang tidak memperbolehkan android bagi mahasiswa baru selama tinggal di asrama. Sarana prasana yang kurang memadai dan pembiayaan kegiatan yang masih kurang mencukupi menjadi kendala tersendiri yang patut jadi pertimbangan.
The paradigm shift in the later fourth millennium BC. •
Authors: Bondár Mária
Published: June 2023

The fourth millennium BC, particularly its second half, saw the advent of major innovations that still affect our life today, sometimes as artefacts still used in a virtually unchanged form. Among these, the most important are wheels and wheeled vehicles, the innovations introduced as part of the Secondary Products Revolution, and the new technologies of metalworking. Initially surrounded by an aura of mystique and reverence, these innovations gradually became part of everyday life and their benefits, such as a more secure livelihood engendering new subsistence strategies, were enjoyed by a growing number of communities. Better life circumstances stimulated population growth, which in turn sparked an increase in the number of settlements as well as an incipient socio-economic hierarchy between them. Improving life circumstances, receptiveness to new ideas and increasingly dynamic contacts with distant regions brought a change in previous norms and social values. This paradigm shift can be best traced in the mortuary realm: various objects signalling the status and/or prestige of a community's prominent members began to be deposited in burials. Daily life became more predictable and was accompanied by a certain measure of wealth accumulation, which, however, also stimulated frugality. Hard-to-obtain exotic commodities were highly prized and usually only their down-scaled versions fashioned from clay accompanied the dead instead of the real-life animal or prestige item. Described and briefly discussed in the present study are certain aspects of this complex process.
Raw glass and glassworking practices beyond the Roman limes: A case study of the late Roman workshop in Komarov (Middle Dniester, Western Ukraine)
Authors: Rumyantseva Olga , Trifonov Alexander , Khanin Dmitry , Chervyakovskaya Maria , Chervyakovskiy Vasiliy
Published: June 2023

The chemical composition of 42 samples of raw glass from the Komarov settlement on the Middle Dniester was studied by means of SEM-EDS, EPMA and LA-ICP-MS analyses. We singled out groups of colourless glass of Levantine and Egyptian origin, the chronology of which indicates that the workshop could be dated to the 4th – early 5th century. The data on the chemical composition of the raw glass do not confirm that glassmaking industry existed here in an earlier period, as was previously believed. The manufacturing in Komarov combines the use of high-quality perfectly decolourized raw glass with intensive use of cullet, which might point out either different levels of the glassware manufactured here, or selective recycling. The characteristic features of the workshop's raw glass supply are the absence of the HIMT glass and late spread of antimony-decolourized glass.
György Cziffra's Life in Hungary (1921–1956)
Authors: Cselényi Máté
Published: June 2023

Georges Cziffra (1921–1994) was one of the outstanding figures of Hungarian and international performing arts in the twentieth century. His adventurous life, career, fate, the virtuosity of his technical skills and his international fame have created a cult of his own, especially in recent years. However, his professional career and general biography have not yet been studied, and little to no literature has been written in the two and a half decades since his death. Thus, the reader/researcher can rely almost exclusively on his autobiography (Cannons and Flowers) and on personal reminiscences and anecdotes, which, as my research has shown, resemble a very limited extent of reality. My aim is to reconstruct and present an objective, fact-based biography in the current study, relying on the material of archives and other institutions and libraries I have collected, as well as on the complete contemporary digitized press material.
Performance Perspectives in Jenő Hubay's Violin Concertos
Authors: Pu Lihua
Published: June 2023

Jenő Hubay (1858–1937) attained his greatest stature as the founder of the Hungarian Violin School. Although Hubay's name is mostly mentioned in violin pedagogy, he was also a popular composer during his lifetime. He composed over 300 violin works, and his role as composer is underestimated unlike those of contemporaries such as Eugène Ysaÿe. The present paper focuses on the performance perspectives in Hubay's violin concertos, by examining the historical background of each concerto, followed by a systematic approach to violin and musical techniques. This includes guidelines for determining tempo, dynamics/dynamic planning, bowing/articulation, tempo rubato, and portamenti/vibrato to create a style of performance appropriate to Hubay's works.
A konduktív nevelésben részesülő, cerebralis paresissel élő tinédzserek életminősége
Authors: Mladoneczki-Leszkó Dóra , Kelemen Anna
Published: June 2023

Bevezetés: Az életminőség meghatározása kulcsfontosságú a
cerebralis paresissel élőknél, hiszen az életminőség közvetve azt is jelzi, hogy
milyen valószínűséggel elégülnek ki szükségleteik és vágyaik, illetve szubjektív
módon következtethetünk az egyének egészségi állapotára is. Mivel a cerebralis
paresis gyermekkorban manifesztálódó állapot, az életminőséggel kapcsolatos
kutatások nagy része a gyermekekre összpontosít; kevés olyan tanulmány létezik,
amely a serdülők vagy a felnőttek életminőségét venné górcső alá.
Célkitűzés: Kutatásunk célja a Semmelweis Egyetem Pető
András Kara által nyújtott konduktív nevelésben részesülő, cerebralis paresissel
élő tinédzserek életminőségének feltárása volt, valamint a szülők és serdülő
gyermekük életminőségének megítélései közötti különbségek és azonosságok
feltérképezése. Módszer: Ez egy leíró, keresztmetszeti
tanulmány, melynek során a cerebralis paresissel élő serdülők számára készült
életminőség-kérdőívet (CP QoL-Teen) használtuk. 60 olyan serdülő és családjuk
vett részt a kutatásban, akiknél cerebralis paresist diagnosztizáltak, és
konduktív nevelésben részesülnek. A serdülők és szüleik is kitöltötték a CP
QoL-Teen kérdőívet. A szülők a kérdőív proxyverziójára adtak választ.
Eredmények: Az általunk vizsgált populációban a szülők és a
tinédzserek kérdésekre adott válaszai között nincs számottevő különbség. A
legmagasabb egyezést a független t-próba elvégzése során a
’szociális jóllét’ (p = 0,982) domén esetében kaptuk.
Következtetés: Ez a tanulmány rávilágíthat a szociális
kapcsolatok fontosságára a cerebralis paresissel élő tinédzserek jobb
életminőségének elérésében. Továbbá a szülők és serdülő gyermekük közti
kapcsolatokra is rámutat, hiszen a szülők közel ugyanúgy értékelték gyermekeik
életminőségét, mint ők maguk. Orv Hetil. 2023; 164(24): 948–953.
Effect of reproductive indices and bovine somatotropin on milk yield in Holstein cows experiencing climatic sub-fertility
Authors:   Autonomous Agrarian University Antonio Narro, Department of Animal Nutrition, 25315 Saltillo, Mexico, Luna Marcos
Published: June 2023

This study aimed at determining the association between reproductive indexes and the total milk yield in non-planed lactations ≥600 days in sub-fertile Holstein cows treated or not with recombinant bovine somatotropin (rbST) and experienced prolonged hyperthermia. A total of 1141 cows with a single lactation were enrolled in the study: 622 were not treated with rbST (control) and 519 were treated with rbST (500 mg every 14 days throughout lactation). Across parities, control cows with >480 days open, produced 5642 kg more milk (p<0.01) than cows with <380 days open. rbST-treated cows produced 5994 more (p<0.01) kg of milk during the entire lactation than cows with <380 days open. In control cows receiving ≥10 services, the average total milk yield was 1811 kg higher (p<0.01) than in cows receiving ≤10 services. In rbST-treated cows, the average total milk yield was 1680 kg higher (p<0.01) in cows receiving ≥10 services, compared to cows receiving ≤10 services. The overall conception rate for all services was 51% and 73% (p<0.01) for control and rbST-treated cows, respectively. In conclusion, the greater the delay to get pregnant and the greater the number of services per lactation the higher the total milk yield per lactation were observed. Thus, in this unusual situation where sub-fertile cows are retained with >380 days open and they continue to be inseminated after 10 unsuccessful services, the impact of delayed conception is not entirely negative as this disadvantage is more than outweighed by the extra milk that is produced when lactation is extended.