bluuebunny/crossref_metadata_2025_split huggingface dataset:
NUMERICAL SIMULATION OF ELASTIC-PLASTIC DEFORMATION OF TORSION SHAFTS OF VEHICLE SPRING SYSTEMS, TAKING INTO ACCOUNT CONTACT INTERACTION
Authors: Tkachuk Mykola M. , Grabovskiy Andrey , Zavorotnii Anton , Kutsenko Serhii , Saverska Mariia , Klochkov Illia , Zinchenko Olena , Tkachuk Mykola А. , Nazarenko Sergiy , Pinchuk Nataliya , Marusenko Svitlana 
Published: December 2022

The paper develops a model of stress-strain state of torsion shafts. A variable formulation of the problem on the basis of the theory of variational inequalities was made. Numerical modeling of the stress-head-deformed state was made with the involvement of the finite element method. In the model of the stress-head-deformed state of torsion shafts, its generalized parametric description is integrated. It contains both varied significant design and technological indicators, in particular, the structural design of the torsion head, the galley transition and the diameter of the stem torsion shaft stem, and the parameters of the technological process of double winding: twist angles and features of the shaft material. It is established that the stresses that occur in the torsion shaft are mainly concentrated in the contact interaction zone of the spline shaft head with the spline coupling. The parametric dependencies of the level of equivalent stresses by Mises on the level of double windings and on the ratio of the head diameter and the stem of the torsion shaft stem have been determined. Recommendations have been developed regarding the improvement of strength characteristics of torsion shafts. Contact pressure distribution on the slots of the torsion bar head is also determined. Its characteristic features depend on the type of boundary conditions. If bilateral interaction is enabled on the boundary, the contact pressure may become negative. Furthermore, the contact pressure gets a sharp spike. This non-physical feature disappears if unilateral contact conditions are imposed. Therefore, this version of the boundary conditions is more adequate. It was used to compute the stress-strain state of a torsion bar, taking into account the plastic deformation of the material and the contact interaction with conjugate bodes.
Keywords: torsional shaft; stress-strain state; finite element method; theory of variational inequalities; contact interaction
THEORETICAL BASIS FOR THE ANALYSIS OF CONTACT INTERACTION AND ELASTIC-PLASTIC DEFORMATION OF ELEMENTS OF CIVIL AND MILITARY PURPOSE VEHICLES
Authors: Tkachuk Mykola M. , Saverska Mariia , Kutsenko Serhii , Zinchenko Olena , Klochkov Illia , Tkachuk Mykola А. , Voloshina Iryna 
Published: December 2022

The problem that is solved and described in the article is the need to synthesize new technical solutions for the elements of military equipment. To this end, scientific principles have been developed and implemented, mathematical and numerical models for the study of the stress-strain state of bodies made of modern materials in the conditions of contact interaction and elastic-plastic deformation have been improved. A fundamental feature is the use of microstructural models of the properties of materials in volume and on the surface. In addition, at the macro-scale level, a more general variational statement has been developed that takes into account physical and structural nonlinearities. This gives significantly higher opportunities in substantiating better technical solutions of elements of military equipment with tactical and technical and technical characteristics at the world level by conducting studies of the stress-strain state of contacting bodies. A variational formulation based on a modified Kalker principle has been developed for this purpose. The problem is stated with respect to the increments of the contact pressure. The discretization is performed by means of the boundary element method. Besides, another formulation via variational inequalities is developed. In this case the contact problem is stated for thedisplacement increments of the surface points of the two bodies. Correspondingly, discretization is performed by means of the finite element method. The resolving system of equations and inequalities is ultimately derived in the general form. The analysis of the stress-strain state of the contacting bodies with account for their elasto-plastic deformations is hence performed in the most general form. This problem statement forms a basis for the analysis and justification of design solutions for machine elements by strength criteria.
Keywords: : military and civilian vehicles; stress-strain state; contact; tactical and technical characteristics
OPTIMAL DESIGN OF INVOLUTE SPUR GEARS WITH INCREASED CONTACT RATIO: OBJECTIVE FUNCTION, VARIABLES PLANNING AND CONSTRAINTS
Authors: Ustynenko Oleksandr , Cherelev Stanislav , Bošanský Miroslav , Protasov Roman , Bondarenko Oleksiy , Levin Nikita 
Published: December 2022

Reducing the mass and dimensions of involute spur gears is an actual task of modern mechanical engineering. One of the perspective ways to solve it is the use of gearing with an increased working tooth depth and profile contact ratio εα ≥ 2. The study is devoted to the development of optimal design methods for such gears. Optimality criteria is formulated as follows: the contact stresses in the pitch point must take a minimum value when all constructive, geometric, kinematic, and technological constraints are met, first, when the profile contact ratio εα ≥ 2 is ensured. Variables planning are defined. These are addendum coefficients of the basic racks tooth for pinion and wheel , ; profile angle of the basic rack α; addendum modification coefficient of the pinion x1. Formed a system of constraints for the variables planning: the main functional constraint of the minimum value of the profile contact ratio: εα ≥ 2; constraint for the addendum coefficients of the basic racks tooth for pinion and wheel , ; constraint for profile angle of the basic rack α; constraint for addendum modification coefficients x1, x2; absence of the cutter interference for tooth dedendum; absence of the sharpening for tooth addendum; absence of the mesh interference; ensuring the bending strength of pinion and wheel teeth. A method for solving the problem of optimal design is chosen. The method of probing the space of design parameters was chosen from all the variety. The points of the LPτ-sequence are used as test points. The method allows you to operate with a significant number of parameters – up to 51, provides a sufficiently large number of evenly distributed test points – up to 220. In further studies, it is planned developing of methods and algorithms for solving the problem. Also carry out test and verification calculations to confirm and evaluate the theoretical results.
Keywords: spur gear, profile contact ratio, contact stress, optimal design, objective function, variables planning, constraints of the variables planning.
Digital control unit for switching power supplies based on STM32G474RET6 microcontroller
Authors: Derkach Maryna , Eremenko Andriy 
Published: December 2022

The article is devoted to the development of a digital control unit based on a specialized STM32G474RET6 microcontroller, which will improve the software algorithm for controlling a switching power supply. The developed block consists of a minimum number of components and is a universal basis for controlling high-power power supplies with complex topologies. The microcontroller program makes efficient use of the computational resources of the new hardware. Illustr.: 4. Table: 1. Bibliography: 10 titles.
Keywords: block, source, impulse, microcontroller, control.
EFFICIENCY EVALUATION OF STEAM-GAS PLANTS WITH THE SOLID OXIDE FUEL CELLS INTEGRATION
Authors: Kostikov Andrii , Tarasova Victoria , Kuznetsov Mikhail , Ganzha Mykola , Mazur Andrii 
Published: December 2022

Today in Ukraine the generation of electricity increasing is an extremely urgent task, which can be solved in a short period not only by the creation of new power plants, but by the modernization of high-power steam power units of existing thermal power plants. The conceptual solutions for the use of the gas turbine cycle and solid oxide fuel cell (SOFC) technology as an add-on to existing high-power steam turbines to increase the efficiency and environmental friendliness of their operation was developed. The paper considers the ways of complex modernization on the example of power units of CHPP-5 in Kharkiv with T-110/120-130 steam turbines. As an add-on, it is proposed to use the GTE-60 gas turbine unit with a capacity of 60 MW, produced at the Zorya-Mashproekt State Enterprise, Mykolaiv. Also, the integration into the “T-110/120-130–GTE-60” steam-gas circuit of a modular SOFC unit with internal reforming with a total capacity of 20 MW, which is composed of 40 tubular fuel cells with a capacity of 500 kW is considered. In the study of the condensation mode of the steam turbine operation, the following results were obtained: with the standard scheme of parallel connection of the gas turbine unit to the steam turbine with the supply of steam produced in the heat recovery steam generator (HRSG) to the medium-pressure turbine, the electrical efficiency was 42%, and the total electrical power of the installation was 170 MW; when the gas turbine unit was connected in parallel to the steam turbine with the supply of steam produced in the HRSG to the high-pressure turbine, the electrical efficiency reached 44.75%, and the total electrical power was 170 MW (during the operation of such a scheme, the steam is overheated due to additional combustion of gas in the HRSG); the waste circuit for connecting the gas turbine unit to the steam turbine with SOFC and regeneration substitution provided the electrical efficiency of 46% and the total electrical power of 190 MW; in the scheme of parallel connection of the gas turbine unit and SOFC to the steam turbine with the supply of produced steam to the high-pressure turbine, the electrical efficiency was 49.4% with the total electrical power of 190 MW. A comparative energy analysis of various options for combined circuit solutions for the modernization of the existing power unit of CHPP-5 was performed. This analysis showed that the greatest increase in electrical efficiency by 12% compared to the existing T-100/120-130 steam turbine was achieved in the scheme of parallel connection of the GTE-60 gas turbine unit with gas afterburning in the HRSG and SOFC with a total capacity of 20 MW.
Peran Sistem Integritas, Sistem Pengendalian Internal, Kepem-impinan dan Komitmen Organisasi Terhadap Akuntabilitas
Authors: Pitaloka Bella Dwi Gina , Carolina Anita , Abrori Rian 
Published: December 2022

Penelitian ini berusaha untuk menguji pengaruh sistem integritas, sistem pengendalian internal, kepemimpinan dan komitmen organisasi terhadap akuntabilitas pengelolaan ekowisata mangrove. Penelitian ini menggunakan pendekatan deskriptif dan kuantitatif, dengan cara membagikan kuesioner sebagai alat pengumpulan data primer. Metode purposive sampling digunakan untuk memilih 161 anggota kelompok sadar wisata di 4 kabupaten di Madura. Perangkat lunak SPSS 26 dipilih untuk digunakan dalam menganalisis informasi yang telah dikumpulkan. Hasil yang diperoleh mengungkapkan bahwa terdapat hubungan positif langsung yang signifikan antara sistem integritas dan akuntabilitas serta sistem pengendalian internal dan akuntabilitas. Namun, tidak terdapat hubungan langsung antara kepemimpinan dan akuntabilitas serta komitmen organisasi dan akuntabilitas. Penelitian ini bermanfaat bagi pemerintah, pengelola pariwisata dan masyarakat sekaligus memperluas literature mengenai peran sistem integritas, sistem pengendalian internal, kepemimpinan dan komitmen organisasi untuk meningkatkan akuntabiltas dalam pengelolaan pariwisata. The study sought to examine the impact of integrity system, internal control system, leadership and organizational commitment on accountability in mangrove ecotourism governance. The study was descriptive and quantitative in design, with a questionnaire functioning as the primary data collection tool. A purposive sample method was used to select 161 members of a tourism awareness group that manages mangrove tourism in 4 districts in Madura. SPSS 26 software was used to analyze the information collected. The results revealed a direct significant positive relationship between integrity system and accountability as well as internal control system and accountability. However, the direct link between leadership and organizational commitment and accountability was not supported. This study is beneficial to the government, tourism management and the community, as well as expanding to the literature on the importance of integrity systems, internal control systems, leadership, and organizational commitment in increasing accountability in tourism management.
Personas sordas y lengua de señas: un enigma en Odontología
Authors: Muñoz Quispe Mirian Elizabeth , Mendoza Condor Michaell Jeremy , Cahuana Vilchez Jorge Enrique , Mattos-Vela Manuel Antonio 
Published: December 2022

La lengua de señas es el principal medio de comunicación de las personas sordas; consiste en la combinación de movimientos manuales, corporales y faciales con significados específicos. Entre las principales barreras a las que se enfrenta esta comunidad resaltan la falta de comunicación, escasez de servicios de salud, sumado a la inexperiencia y desconocimiento de la lengua de señas por parte del profesional de la salud. El presente artículo tiene como objetivo dar a conocer la importancia y necesidad de la lengua de señas en la atención clínica odontológica y en la formación profesional, así como de estrategias, herramientas y recomendaciones para una mejor atención de las personas sordas. Se incluyeron bases de datos como Scielo, Google Scholar, Pubmed y ScienceDirect durante los años 2007 y 2021. Se concluyó que las principales barreras durante la comunicación es el poco dominio de lengua de señas en los odontólogos, el poco acceso a intérpretes y dificultades en la obtención de citas; repercutiendo en la susceptibilidad a desarrollar enfermedades bucodentales. La inclusión de cursos de lengua de señas dentro de la currícula universitaria aportan beneficios académicos y en la ética profesional; aún así, es necesario un seguimiento que corrobore el cumplimiento de los parámetros solicitados. Dentro de las principales herramientas y estrategias, el uso de videos educativos, el acompañamiento de intérpretes y -en vista del desarrollo tecnológico- el uso de aplicativos móviles, pueden facilitar la comunicación. Asimismo, se plantea un conjunto de recomendaciones para el abordaje de pacientes sordos adultos y niños.
Multilevel Lumbar Fusion and Sacral Fusion Affect Joint Space Narrowing of the Hip: A Retrospective Study
Authors: Ukai Taku , Katoh Hiroyuki , Yokoyama Katsuya , Omura Haruka , Watanabe Masahiko 
Published: December 2022

Abstract
Background: This study aimed to elucidate the effect of lumbosacral fusion on joint space narrowing of the hip.
Methods: We retrospectively studied 511 hips of 261 patients who had undergone lumbar fusion. Whole-spine X-ray was performed for all the patients before surgery and at the final follow-up. Center edge angle, joint space of the hip, sagittal vertical axis, thoracic kyphosis, lumbar lordosis, pelvic incidence, pelvic tilt, and sacral slope were measured. The number of lumbar fusion levels, inclusion of sacral fusion, follow-up duration, and wear of the hip joint (mm/year) were also recorded. Multi regression analysis was performed to identify the risk factors for joint space narrowing.
Results: Female sex (P=0.04), number of fixed lumbar levels (P=0.002), sacral fusions (P=0.039), and follow-up period (P<0.001) were independent risk factors for joint space narrowing of the hip. The patients who underwent four or more levels of lumbar fusion experienced more rapid wearing of the hip joint space than that experienced by patients with less than three levels of lumbar fusion (P=0.044).
Conclusion: Surgeons should pay attention to joint space narrowing of the hip after performing multiple lumbar fusions or sacral fusion in women.
Macroeconomic Factors and the Prospects of Economic Prosperity in a Developing Economy: Evidence from Dynamic ARDL Simulations and KRLS Techniques
Authors: Aladejare Samson Adeniyi 
Published: December 2022

Abstract
This study simulated the counterfactual shock effects of inflation and exchange rates on economic prosperity (measured by GDP per capita) when considering deficit financing, foreign investment, and financial development for Nigeria from 1970 to 2020. Empirical inferences were derived by applying the novel dynamic ARDL and the Kernel regularised least squares models. Applying both techniques enabled the response of economic prosperity to future counterfactual shocks to the inflation and exchange rate variables. It was observed that inflationary shocks might have long-term beneficial effects on economic prosperity; however, shocks to the exchange rate will erode these benefits. Findings also showed that inflation rate and deficit financing adversely impacted short and long-term economic wealth. Contemporaneously, the exchange rate and financial development only benefited economic prosperity in the long term, while foreign investment was ineffectual. The study also proposed several policy measures.
Factors associated with the severity of premenstrual symptoms in women with central obesity: a cross sectional study
Authors: Sharifan Payam , Esfahani Ali Jafarzadeh , Zamiri Amir , Toosi Mansoureh Sadat Ekhteraee , Sedghdoost Fatemeh , Taghizadeh Niloufar , Mohammadi-Bajgiran Maryam , Ghazizadeh Hamideh , Sahranavard Toktam , Ferns Gordon , Ghayour-Mobarhan Majid 
Published: December 2022

Abstract
Introduction: Premenstrual syndrome (PMS) is a common condition that affects social and psychological well-being of women. The risk of PMS is higher among obese women. The aim of this study was to identify the factors that influence the severity of PMS in women with central obesity.
Materials and methods: This cross-sectional study was performed on 30 to 50-year-old women who were 30 to 50-year-old with abdominal obesity (waist circumference > 80cm). The following data were collected: demographic data, anthropometric measurements, premenstrual symptoms screening tools (PSST), semi-quantitative food frequency questionnaire (FFQ), 42-item depression, anxiety, and stress questionnaire (DASS-42), as well as serum vitamin D, and renal function tests.
Results: A total of 139 women (mean age of 41.40 ± 7.39 years old) participated in the study. The prevalence of mild, moderate and severe premenstrual symptoms was 38.7% (55/142), 31.7% (45/142) and 27.5% (39/142), respectively. There was no significant difference between the groups in terms of anthropometric measurements and energy-adjusted nutrient intakes (p>0.05). There was a significant relationship between moderate PMS and energy-adjusted saturated fatty acid (SFA) (p=.018, OR=.010 and 95% CI for OR: <.001 and .452), and energy-adjusted riboflavin (p=.042, OR=.005, 95% CI for OR: <.001 and .821), and between severe PMS and age (p=.034, OR=.906, 95% CI for OR: .826 and .993), and energy-adjusted monounsaturated fatty acid (MUFA) intake (p=.041, OR=23.789, 95% CI for OR: 1.138 and 497.294).
Conclusions: High intakes of MUFA and younger age were associated with a greater severity of PMS, while riboflavin intake was associated with reduced PMS severity.
Gains and Losses: A Phenomenographic Study on Adolescents’ Understanding of Isolation due to COVID-19
Authors: Rosali Leann Jester , Erojo Kreen , Dicto Princess Joy 
Published: December 2022

Abstract
The global health emergency posed by the COVID-19 outbreak has affected millions of people. In the Philippines, among the establishments closed are schools which resulted in children and adolescents staying at home for years under quarantine. Many studies were conducted focusing on the impact of isolation on people's physical and emotional well-being, most notably the children and adolescents who are considered vulnerable individuals. However, limited studies investigated how these young people understand their experiences while in quarantine. Hence, this phenomenographic study aims to provide insights into Filipino adolescents' realities by exploring the many different ways they view isolation. Seventeen adolescents in quarantine were interviewed, and qualitative analysis revealed an outcome space where isolation is seen in the light of gains and losses as described in three emerging ways of understanding. The descriptions reveal understandings that isolation is (1) a restraint, (2) a necessity, and (3) an opportunity that has an impact on the physical, emotional, and social dimensions of adolescents' lives. Implications and recommendations presented may serve as a basis for designing programs and interventions to help adolescents deal with possible negative feelings in isolation and post-quarantine.
Delphi panel to obtain clinical consensus regarding the importance of rapid reduction in depressive symptoms in patients with major depressive disorder with acute suicidal ideation or behavior (MDSI)
Authors: Borentain Stephane , McCormick Carter , Joshi Kruti , O’Hara Marguerite , Zhang Qiaoyi , Haughey Siobhan Mulhern , Richards Sarah , Anjo Joana , Zante David , Kewley Rachel , Riley Danielle , Nagda Nirav , Perry Richard 
Published: December 2022

Abstract
Background: Though oral antidepressants can be effective at reducing depressive symptoms, they can take 4–6 weeks to reach full effect. Limitations relating to slow onset of action and resistance to current treatments for patients with major depressive disorder (MDD), particularly for MDD in a psychiatric emergency such as major depressive disorder with acute suicidal ideation or behavior (MDSI), is an issue across all countries and healthcare settings. Due to the current unmet needs and slow onset of action from oral antidepressants, patients with MDSI need interventions that provide a rapid relief of depressive symptoms. This study aimed to identify unmet needs in the treatment for MDSI, specifically exploring the potential clinical benefits of a rapid reduction of depressive symptoms, associated with treatment with rapid acting antidepressant such as esketamine nasal spray.
Methods: A Delphi panel consisting of independent psychiatrists experienced in treating patients with MDSI (n=12) from the United States, Canada, United Kingdom, and European Union, was conducted between December 2020–June 2021. Psychiatrists were recruited and screened by an independent party to ensure that they had the required experience. Psychiatrists completed two rounds of anonymized questionnaires, and a virtual consensus meeting to collect their perceptive on current treatments for MDSI.
Results: This research confirmed current unmet needs in the treatment of patients with MDSI. Hopelessness, functional impairment, worsening of symptoms, recurrent hospitalization and higher risk of suicide attempt were considered key consequences of the slow onset of action of oral antidepressants. Psychiatrists anticipated that treatment with rapid-acting antidepressants would provide benefits such as shorter hospital stays, improved patient engagement/compliance, and improved patient outcomes. For long-term benefits, psychiatrists agreed that improved daily functioning and increased trust/confidence in treatment options were key benefits of rapid-acting antidepressants.
Conclusions: These findings suggest that the use of rapid-acting antidepressants such as esketamine nasal spray, in a psychiatric emergency, may help alleviate some of the current unmet needs experienced by patients with MDSI. This Delphi panel of psychiatrists highlighted that treatment with rapid-acting antidepressants can provide clinically meaningful benefits in the and long-term, as well as the immediate- and short-term, for patients with MDSI.