bluuebunny/crossref_metadata_2025 huggingface dataset:
OPTIMIZATION OF WORKERS QUANTITY USING MATHEMATICAL MODEL
Authors:   VSB - Technical University of Ostrava, Faculty of Mechanical Engineering, Institute of Transport, KRUMP STEPAN , GRAF VOJTECH ,   VSB - Technical University of Ostrava, Faculty of Mechanical Engineering, Institute of Transport, STANEK PAVEL ,   VSB - Technical University of Ostrava, Faculty of Mechanical Engineering, Institute of Transport
Published: March 2023

Production and maintenance processes are inherent in the life cycle of every product. Despite great efforts to automate these processes, a great deal of human resources are still required, which represent a significant part of the financial costs. Each process is composed of sub-tasks that require certain specifics in terms of the number of staff, their expertise, qualifications and experience. It is assumed that the staff are divided according to specifics into different groups with differing wages. Workers' wages are reflected in the final financial cost of the product, its life cycle and its return. Reducing labour costs in a production or maintenance process can be achieved by reducing the total number of staff deployed in the process and by appropriately composing groups of workers. Reducing labour costs leads to increased competitiveness in the market. The main tools of competitiveness are price, speed and range of services offered. This paper examines a strategy that uses price as the main tool for competitiveness in the market. One way to reduce the final price of the product for the customer is to optimise the costs of human resources. This can be achieved through appropriate planning of staff shifts. The specifics of the deployment of staff in a production or maintenance process depend on the requirements of the process sub-tasks. This means that each group of workers can only handle a certain group of tasks according to their qualifications. A Binary Programming Problem with Linear Bonds will be used to plan the deployment of staff, aiming to minimize the number of workers needed in a production or maintenance process within a predefined timeframe.
COMPARATIVE ANALYSIS OF DIFFERENT SOFTWARES IN TERMS OF PARAMETERS OPTIMIZED BY TOPOLOGICAL OPTIMIZATION
Authors:   VSB – Technical University of Ostrava, Faculty of Mechanical Engineering, Department of Machine Parts and Mechanism, STRUZ JIRI , HRUZIK LUKAS ,   VSB – Technical University of Ostrava, Faculty of Mechanical Engineering, Department of Machine Parts and Mechanism, KLAPETEK LUKAS ,   VSB – Technical University of Ostrava, Faculty of Mechanical Engineering, Department of Machine Parts and Mechanism, TROCHTA MIROSLAV ,   VSB – Technical University of Ostrava, Faculty of Mechanical Engineering, Department of Machine Parts and Mechanism
Published: March 2023

In recent years, topological optimization has become a powerful tool for designers and engineers in the technical world. The principle of this method is based on optimizing a given optimization region by minimizing or maximizing one or more objective functions, e.g. stiffness, mass, or natural frequency of the structure. For this reason, software companies developing CAD or FEM software have included topological optimization in their portfolio, either as a modular part of the software or as a dedicated program. In general, users of these programs do not have a mathematical definition of the software background, and it is not clear what variations in calculations may occur when using different software. For this reason, a comparative analysis of the selected software was performed to determine the differences between the results assuming the same boundary conditions and machine parts such as computing time, weight and volume.
COMPARISON OF STANDARD AND NONSTANDARD GEAR ROOT FILLET CONSIDERING ROOT STRESS AND MANUFACTURING POSSIBILITIES
Authors:   VSB - Technical University of Ostrava, Faculty of Mechanical Engineering, Department of Machine Parts and Mechanism, KLAPETEK LUKAS , DOBIAS JIRI ,   VSB - Technical University of Ostrava, Faculty of Mechanical Engineering, Department of Machine Parts and Mechanism, STRUZ JIRI ,   VSB - Technical University of Ostrava, Faculty of Mechanical Engineering, Department of Machine Parts and Mechanism, FOLTA ZDENEK ,   VSB - Technical University of Ostrava, Faculty of Mechanical Engineering, Department of Machine Parts and Mechanism
Published: March 2023

In this paper, root stress, manufacturing possibilities and limitations of standard and nonstandard tooth root fillet of spur gears are examined. Nowadays, standard trochoidal root fillet is used the most as an economical trade-off between tooth strength and manufacturing complexity. A disadvantage of the trochoidal root fillet, especially in spur gears with less than 17 teeth, is undercutting which minimises strength of tooth root, introduces stress concentration, and deteriorates meshing conditions. This study focuses on different root designs, namely elliptical and novel cycloidal root fillets. Root stress in gears with different root designs is analysed by FEM and compared with analytical equations according to ISO. The possibility of producing nonstandard root fillet gears by hobbing and limitations of surface finishing are considered as well. Analysis reveals stress differences between each of the root fillet shapes and their relative advantages and disadvantages.
EXPERIMENTAL VERIFICATION OF PNEUMATIC ELEMENTS MATHEMATICAL MODELS IN MATLAB-SIMULINK SIMSCAPE
Authors:   VSB-Technical University of Ostrava, Faculty of Mechanical Engineering, Departament of Hydromechanics and Hydraulic Equipment, DVORAK LUKAS , FOJTASEK KAMIL ,   VSB-Technical University of Ostrava, Faculty of Mechanical Engineering, Departament of Hydromechanics and Hydraulic Equipment, DYRR FILIP ,   VSB-Technical University of Ostrava, Faculty of Mechanical Engineering, Departament of Hydromechanics and Hydraulic Equipment
Published: March 2023

The paper deal with a mathematical model of a pneumatic system and simulation of its behaviour. In the Matlab-Simulink Simscape program, there are models of basic elements from which it is possible to build a model of the entire system. The article describes the gradual testing of pneumatic elements mathematical models on the base of comparison with experimental data.
TECHNOLOGY OF RESURFACING MN-STEELS USED TO MANUFACTURE RAILS
Authors:   VSB – Technical University of Ostrava, Faculty of Mechanical Engineering, Department of Mechanical Technology, HLAVATY IVO , KREJCI LUCIE ,   VSB – Technical University of Ostrava, Faculty of Mechanical Engineering, Department of Mechanical Technology, BUCKO MICHAL ,   VSB – Technical University of Ostrava, Faculty of Mechanical Engineering, Department of Mechanical Technology, TICHY MIROSLAV ,   VSB – Technical University of Ostrava, Faculty of Mechanical Engineering, Department of Mechanical Technology, FRYSAK MARTIN ,   VSB – Technical University of Ostrava, Faculty of Mechanical Engineering, Department of Mechanical Technology, PALAN MAREK ,   CEZ, a.s.
Published: March 2023

The track components that are the most heavily loaded from the axles of train units are the switch components and rail crossing parts. These parts can be refurbished by welding on suitable types of additional materials. Parts made of high-alloyed Mn-steel (Hadfield steels) need to meet specific conditions for their welding. For the experiment, ESAB OK Tubrodur 14.71 and ESAB OK Tubrodur 15.65 materials were used. The results show the feasibility of appropriate procedures under specific conditions due to the occurrence of metallurgical defects affecting the safety of operation on railway and tram lines. The aim of the experiment was to perform and assess the properties of two types of austenitic welds of different chemical composition on the rail head and rail grooves with the same welding parameters.
COMPLEX DRIVE MODEL OF LINEAR SYNCHRONOUS MOTOR WITH VARIABLE LOAD
Authors:   Department of Electric Engineering, Faculty of Mechanical Engineering, Brno University of Technology, PRUSA RADOMIR , HUZLIK ROSTISLAV ,   Department of Electric Engineering, Faculty of Mechanical Engineering, Brno University of Technology, VLACH RADEK ,   Department of Mechatronics, Faculty of Mechanical Engineering, Brno University of Technology
Published: March 2023

This paper compares the results of a real linear synchronous motor and its digital twin. It differs from other common publications in that it uses only basic mathematical models representing a particular physical principle. In this way, a minimum of input parameters was achieved. At the same time, all model input parameters are normally listed in the motor datasheet or are easily measurable. Nowadays, digital twins are very important for the development of new machines. Achieving accuracy using the finite element method is possible, but the time requirement does not allow real-time simulations. The digital twin in this paper is based on a mathematical model involving temperature dependence. The real motor is loaded at different operating points to better evaluate the quality of the model. The structure of the control loops has a significant effect on the response of the digital twin, so the design is based on the motor driver used. The text focuses on linear synchronous motors, but the methods used can be generalized to the plane of rotary synchronous motors.
STUDY ON COOLING OF HIGH PERFORMANCE SIC FEATURES
Authors:   University of West Bohemia, Regional technological Institute, MAREK VACLAV , KRIZEK MICHAL ,   University of West Bohemia, Regional technological Institute, KAVALIR TOMAS ,   University of West Bohemia, Regional technological Institute
Published: March 2023

High-performance electronic parts are vital features in almost all modern motorized machines. These silicon components are significantly minimised, especially in transportation branch. Concentration of performance requires perfect cooling conditions. A fluid flow cooling by an active cooling circuit with heat sinks is a commonly used principle. Sufficient cooling and uniform temperature field on heat transfer area are crucial parameters for the sustainable function of Silicon-Carbide components. Producer of electric vehicles induces research in the field of coolers due to the requirements of installed SiC features. This study uses advanced CFD methods to analyse the current state of commonly manufactured heat exchangers and provides new approaches by CFD optimisation in combination with 3D printed replacement parts. Approach based on 3D print also allows design inspiration in natural principles. Biomimetic inspiration shows a wide range of thousands of years lasting optimisation made by nature. Research in this field can help us with the evolution of enhanced heat transfer surfaces. Developed coolers were examined by CFD techniques. Simulations of heat transfer are verified by laboratory measurement of prototype heatsinks. These techniques are presented on the unique design of a heat sink which was simulated, manufactured, and measured. The study shows CFD approaches, describes details of prototype measurement, and also deals with negative issues of metal 3D print.
PEMANFAATAN BUKU PASUKAN M SEBAGAI SUMBER BELAJAR UNTUK MEMBANGUN KESADARAN SEJARAH DAN KEMAMPUAN BERPIKIR KRITIS SISWA KELAS XI IPS DI SMAN 1 GLAGAH
Authors: Suryansyah Ronni , Hudiyanto Reza , Sayono Joko
Published: March 2023

The book of Pasukan M is a story that tells about the resistance to maintain independence in the Bali Strait, which was spearheaded by Captain Markandi. In this material, students are invited to visualize local historical events that have occurred so that they can examine the struggles of independence figures in defending their territory and encourage the formation of thinking patterns towards rational, critical, empirical, and can also develop attitudes of human values, respect for others, and mutual cooperation. Building historical awareness and critical thinking skills through Pasukan M provides an overview of how local history can have an impact on students in their lives. As a means of building historical awareness and critical thinking skills of students. Finding solutions to existing problems, thinking actively and creatively in developing critical thinking patterns are also included in the skills students need as life skills. Buku Pasukan M merupakan sebuah kisah yang menceritakan tentang perlawanan mempertahankan kemerdekaan yang berada di Selat Bali yang dipelopori oleh Kapten Markandi. Materi ini siswa diajak untuk visualisasi dari kejadian sejarah lokal yang telah terjadi sehingga dapat menelaah perjuangan para tokoh kemerdekaan dalam mempertahankan wilayahnya dan mendorong terbentuknya pemikiran rasional, berpikir kritis dan juga dapat mengembangkan karakter yang menghargai sesama, dan gotong royong. Membangun kesadaran sejarah dan kemampuan berpikir kritis melalui Pasukan M memberikan sebuah gambaran mengenai bagaimana sejarah lokal bisa memberikan dampak pada siswa dalam kehidupannya. Sebagai sarana membangun kesadaran sejarah dan kemampuan berpikir kritis siswa. Menemukan solusi dari masalah yang ada, berpikir secara aktif dan kreatif dalam mengembangkan pola pikir kritis juga termasuk dalam keterampilan yang dibutuhkan siswa sebagai bekal kecakapan hidup.
Resistant hypertension – pheochromocytoma
Authors:   Faculty of Medicine, University of Iceland, Jónsson Krister Blær , Guðmundsson Eiríkur Orri ,   department of urology, Landspítali National University Hospital of Iceland, Sigurðardóttir Margrét ,   department of pathology, Landspítali National University Hospital of Iceland, Jónsson Jón Jóhannes ,   Faculty of Medicine, University of Iceland, department of genetics, Landspítali National University Hospital of Iceland, Sigurjónsdóttir Helga Ágústa ,   Faculty of Medicine, University of Iceland, department of internal medicine, Landspítali National University Hospital of Iceland
Published: March 2023

We report a case of a man with a 30-year history of treatment-resistant hypertension, hydropoiesis, tachycardic spells and dysgeusia. Despite repeated visits to the emergency department and work-up in an out-patient clinic, the diagnosis was unknown. Three years prior to remittance to an endocrinologist, the hypertension worsened, and he developed diabetes type-II. Further work-up revealed a 3 cm extra-adrenal pheochromocytoma, a paraganglioma. After surgical removal of the tumor, he is without medication and symptom free. Pheochromocytoma and paraganglioma are rare causes of hypertension, estimated to explain 0.1-0.6% of all cases, but nonetheless an important diagnosis to make, due to serious side effects.
Bazı Acıbakla Genotiplerine Ait Ucucu Bileşiklerin SPME GC-MS Yöntemiyle Karakterizasyonu
Authors: ŞİMŞEK SEZER Ela Nur , YORGANCILAR Mustafa , UYSAL Tuna
Published: March 2023

Bu çalışmada, üç Lupinus albus L. ve iki L. angustifolius L. genotipi GC-MS ve SPME teknikleri kullanılarak uçucu veya yarı uçucu maddeler açısından araştırılmış ve karşılaştırılmıştır. Bu amaçla acı bakla tohumları el değirmeni yardımıyla öğütülmüş ve bu toz, ham madde içeriğinin belirlenmesinde kullanılmıştır. Bu acı bakla genotiplerinde yaklaşık olarak 102 bileşik ilk defa tanımlanmıştır. Bu bileşiklerden başlıcaları; benzene-methyl (1-methyl ethyl), 5-Allyl-4-(1-(p-aminophenyl) ethylidenehyl, 2-propen-1-ol, 3-phenyl-, m-Mentha-4,8, diene-(1S,3S)-(+), gamma terpinene dir. Bu bileşiklerin farklı genotiplerde ve farklı oranlarda bulunduğu tespit edilmiştir. Sonuç olarak, bitkilerden veya bitki parçalarından gelen aktif maddeleri ve olası potansiyellerini ortaya koymayı amaçlayan bu tür çalışmalar, gelecekte yapılacak daha spesifik çalışmalar açısından büyük önem taşımaktadır.
Prevalence of refractive errors in children of Puerto Rico
Authors:   Inter American University of Puerto Rico, School of Optometry, 500 John Will Harris, Bayamón, Puerto Rico 00957, USA, Santiago Héctor C. , Ortiz Katerin ,   Inter American University of Puerto Rico, School of Optometry, 500 John Will Harris, Bayamón, Puerto Rico 00957, USA, Rivera Andrés ,   Inter American University of Puerto Rico, School of Optometry, 500 John Will Harris, Bayamón, Puerto Rico 00957, USA, Nieves Mónica ,   Inter American University of Puerto Rico, School of Optometry, 500 John Will Harris, Bayamón, Puerto Rico 00957, USA, Piña José ,   Inter American University of Puerto Rico, School of Optometry, 500 John Will Harris, Bayamón, Puerto Rico 00957, USA, Torres Zulmaris ,   Inter American University of Puerto Rico, School of Optometry, 500 John Will Harris, Bayamón, Puerto Rico 00957, USA, Mercado Yvette ,   Inter American University of Puerto Rico, School of Optometry, 500 John Will Harris, Bayamón, Puerto Rico 00957, USA
Published: March 2023

AIM: To determine the prevalence of refractive error in 5- to 17-year-old schoolchildren in Puerto Rico.
METHODS: A quantitative descriptive study of 2867 children aged 5 to 17y from all seven educational regions of Puerto Rico was conducted from 2016–2019. Refractive error was determined via static and subjective refraction. Children with distance acuity ≤20/40 or near visual acuity ≤20/32 had a cycloplegic refraction. Data analysis included descriptive statistics, correlation coefficient, Kruskal?Wallis, Chi-square, and t test calculations.
RESULTS: Twenty percent of the children had a spherical equivalent refractive error ≤ -0.50 D, 3.2% had a spherical equivalent ≥ +2.00 D, and 10.4% had astigmatism ≥1 D. There was a statistically (but non-clinically) significant myopic change in spherical equivalent refractive error with age (P<0.001). The prevalence of myopia increased with age (P<0.001) but not hyperopia (P=0.59) or astigmatism (P=0.51). Males had a significantly higher hyperopic spherical equivalent than females (P<0.001). Females had a higher prevalence of myopia (P<0.001) than males, but there was no difference in the hyperopia (P=0.74) or astigmatism prevalence (P=0.87).
CONCLUSION: The prevalence of a spherical equivalent equal to or less than -0.50 D (myopia, 20.7%) is one of the highest among similar-aged children worldwide. Further studies should explore the rate of myopia progression in children in Puerto Rico. Individual children must be monitored to examine the need for treatment of myopia progression.
The state of implementation of the “Gymnastics” section of the physical education program for the of students of 1–11th grades
Authors:   Russian State Pedagogical University named after A. I. Herzen, Kuzmina Svetlana V. , Anisimova Nina A. ,   Russian State Pedagogical University named after A. I. Herzen
Published: March 2023

The state of health and the level of physical fitness of children are the parts of a serious problem that needs to be solved by teachers of physical education as well, but under modern conditions, this is not always possible. This study is devoted to the identification of problems related to the above-mentioned issue, in which 78 respondents – teachers of physical culture from 52 secondary schools – took part. As a result of the study conducted by the method of questioning, it was found out that the most difficult to implement is the section “gymnastics”. The main problems are: the poor health of schoolchildren and poor physical fitness, the lack of sports and gymnastic equipment, as well as the increased workload of gyms. As an option to overcome the difficulties arising in the implementation of the section “Gymnastics”, many teachers are considering the possibility of using fitness technologies, however, in practice, only a smaller part of respondents implement them. The conclusion was made that the implementation of the gymnastics section in full under modern conditions is difficult to achieve, this is proved by the fact that the section is implemented in full only in 22% of educational institutions. It is necessary to adjust the physical education program for schoolchildren (within the section “Gymnastics”) or create such conditions for conducting lessons under which teachers will be given the opportunity to implement the developed programs in full.
Investigation of the relationship between prolonged ventilation and the Glasgow Prognostic Score after elective isolated coronary bypass surgeries in advanced-age patients
Authors: GÜVENÇ Orhan , ENGİN Mesut , KAN Irem Iris , YAVUZ Senol
Published: March 2023

Objectives: Coronary artery bypass graft (CABG) surgeries are the most beneficial treatment method for atherosclerotic heart disease. Prolonged ventilation is a significant condition that poses risks such as infection, renal failure, prolongs hospital stays, and increases treatment costs. In this current study, we aimed to reveal the relationship between prolonged mechanical ventilation and Glasgow Prognostic Score (GPS), in patients aged 65 years and older who underwent isolated CABG.
Methods: Patients aged 65 years and over who underwent elective isolated coronary bypass surgery with cardiopulmonary bypass in our clinic, between June 2017 and June 2022, were included in the study retrospectively. The patients who were extubated within eight hours of the surgeries were determined as Group 1, whereas those who were extubated after 8 hours were determined as Group 2.
Results: Prolonged ventilation occurred in 101 (20.7%) patients (Group 2). The median age of the 385 patients included in Group 1 and 101 patients in Group 2 was 68 (66 to 91) and 71 (66 to 88) years, respectively (p = 0.216). The two groups were similar in regards to gender, hypertension, smoking, diabetes mellitus, body mass index, history of cerebrovascular accident and left ventricular ejection fraction rates. In the multivariate analysis, left ventricular ejection fraction <35% (OR: 1.136, 95% CI: 1.065-1.652, p = 0.029), total perfusion time (OR: 1.190, 95% CI: 1.040-1.659, p = 0.012), and GPS = 2 (OR: 1.479, 95% CI: 1.130-2.169, p = 0.004) were determined as independent predictors for prolonged ventilation.
Conclusions: GPS value calculated preoperatively in elderly patients is a parameter that indicates the increased ventilation need. With the GPS score evaluation, patient groups at risk for prolonged ventilation can be identified and necessary precautions can be undertaken.
QUESTÃO HÍDRICA NAS POLÍTICAS PÚBLICAS
Authors: El-Deir Soraya Giovanetti , Silva Evaldo Dantas
Published: March 2023

As políticas públicas devem ser relevantes para a elaboração e posterior execução das ações das governanças e das demais entidades, no propósito de mitigar os impactos ambientais, dos quais as atividades humanas são preponderantes. Neste sentido, o Tribunal de Justiça de Pernambuco vem assumindo iniciativas sustentáveis através do Plano de Logística Sustentável da instituição. Desta forma, o presente artigo visa analisar as políticas públicas no trato da questão hídrica, dando destaque particular ao Plano de Logística Sustentável do Tribunal de Justiça do Estado de Pernambuco, buscando compreender a relação com os mecanismos legais para aumento da eficiência e eficácia hídrica. A metodologia focou no levantamento documental de âmbito internacional, nacional e estadual, concernente a Acordos, Leis, Decretos e Normas, por meio de leitura crítica. Os Acordos Internacionais liderados pela ONU tornaram-se importantes fomentadores de políticas públicas, no enfrentamento dos fenômenos e fatores que contribuem para a ocorrência da escassez hídrica no mundo. As Leis nacionais e os demais instrumentos infralegais seguiram estes encaminhamentos, buscando adequarem-se à tendência mundial para promover a sustentabilidade hídrica. Já o Tribunal de Justiça de Pernambuco, por meio do Plano de Logística Sustentável, pode ser considerado um caso de benchmarking setorial, mesmo que as iniciativas ainda necessitem de maior aprofundamento nos campos ambiental, social e de governança.
APROXIMAÇÃO ENTRE DIREITO E SUSTENTABILIDADE A PARTIR DO PLURALISMO JURÍDICO
Authors: Fauth Gabriela , Olivares Alberto
Published: March 2023

A chamada crise ambiental explicita uma expressiva crise estrutural que levou as sociedades a repensarem seus padrões de produção e consumo, produzindo uma interpretação do paradigma do desenvolvimento sustentável que alcançou diversos mecanismos de regulação jurídica no contexto do sistema econômico internacional, legitimando poderes e discursos convertidos em hegemônicos. A partir desse contexto, o paradigma do desenvolvimento sustentável foi utilizado metodologicamente como ferramenta para Acordos, Tratados e Protocolos Internacionais, geralmente limitado à matriz lógica do positivismo jurídico e a parâmetros do sistema econômico internacional, conduzidos pelo atual processo de globalização. Nesse sentido, a partir de revisão bibliográfica, este trabalho realiza uma crítica a apropriação do conceito desenvolvimento sustentável pelo capitalismo, quando, supostamente, nasceu para contrapô-lo. Ao mesmo tempo, aponta caminhos no campo do Direito, quando a resposta do instrumental jurídico tem se mostrado insuficiente e, inclusive, inadequada, diante dos desafios globais atuais. A metodologia deste trabalho está baseada na pesquisa documental, a partir de uma interpretação crítica das teorias jurídicas clássicas, aprofundando na evolução do pluralismo jurídico. O trabalho conclui que existe uma importante necessidade de transformação do instrumental jurídico-político no intuito de mediar as diferentes dimensões que compreende a questão ambiental e seus reflexos no contexto da sociedade contemporânea.
KA’AHE’Ẽ GUARANI
Authors: Andrighetto Aline , Martins Laís Nardon
Published: March 2023

O presente estudo visa averiguar a regulamentação jurídica existente no Estado Social brasileiro quanto à biodiversidade encontrada em terras indígenas brasileiras e aos seus etnossaberes, à luz do estudo de caso da ka'ahe'ẽ (stevia) dos povos Guaranis e da Coca-Cola. Considerando a matriz histórica pautada nas chagas da colonialidade, que refuga os povos indígenas à margem social, negando-lhes o acesso aos seus direitos, o estudo busca trazer um aparato geral e histórico desses povos, delineando o estado social democrático de direito brasileiro, o arcabouço jurídico normativo que protege a biodiversidade e os seus etnossaberes. O estudo tem sua fundamentação teórica baseada na descolonialidade. Metodologicamente, a pesquisa consiste em uma revisão teórica e de estudo de caso, tendo como técnica de pesquisa a bibliográfica e a documental a partir de análise exploratória e qualitativa. Como resultados da pesquisa identificam-se: falta de efetividade na aplicação da normativa internacional e de comprometimento com o texto constitucional brasileiro. Nesse aspecto, há violação dos direitos de consulta livre, prévia e informada; repartição de benefícios; e autodeterminação territorial dos povos indígenas – marcas do poder colonial sobre a biodiversidade, ou seja, a biocolonialidade.
The Effect of Swimming on Some Muscular Parameters in the Training of the Medical Students Members of the Handball Team
Authors: Bușe Paul , Georgescu Luminita
Published: March 2023

The game of handball gradually developed into a very fast and demanding sport, with continuous changes in regulation. Speed force, especially found in the form of detente, is a fundamental quality for handball players, especially for players who shoot at goal. The main objective of the game of handball in offensive mode is to score as many goals as possible preceded by dribbling, passing and throwing at goal, while defensively blocks and steals of throws must be carried out. All these actions are based on high-level muscular parameters, acquired through a training directed and conducted according to the specific requirements of the dynamic game of intense physical stresses with rhythm breaks. In this regard, in order to support the handball players, in our research we have introduced swimming sessions within the training programs, both preparatory and pre-competitive and competitive. Purpose: Through this research we have tried to highlight the effects of swimming practice as a complementary sport in the training of amateur handball players and to support the technicians who draw up the training programs in order to increase sports performances and to decrease the risk of injury or physical exhaustion. Methods: This research was conducted on twenty amateur athletes handball players, aged between 19 and 25 years, being divided into two equal groups, with ten students for each group. The subjects were tested and evaluated using the Myotest PRO device in the Jump Plyometry test, through initial and intermediate testing after the preparatory stage and final testing after the competition stage. Results: after comparing the results obtained, the two groups, group 1 and group 2, an evolution is observed on average of 14% for the parameters measured at the end of the preparatory period, and of approximately 5% for the end of the competitive period, for group 1, while the values for group 2, of control, have stagnated or recorded a slight decrease in the pre-competitive and competitive stages.
Primary Education in Wartime: How the Russian Invasion Affected Ukrainian Teachers and the Educational Process in Kryvyi Rih
Authors: Velykodna Mariana , Mishaka Natalia , Miroshnyk Zoia , Deputatov Vladyslav
Published: March 2023

The ability of children in Ukraine to continue their primary education after the Russian invasion is inextricably linked to the direct providers of education – primary school teachers. This study aimed to clarify the psychological effects of the war on Ukrainian primary school teachers and their everyday educational activities, using teachers in the city of Kryvyi Rih as a case study. The research design included personal and professional data, questions on changes in students and the educational process, Psychological Stress Measure (PSM-9), Oldenburg Burnout Inventory (OLBI), Brief Resilience Scale (BRS), and Miroshnyk Teacher’s Roles Self-Assessment Scale (MiTeRoSA) integrated into an online survey conducted three months after the invasion. In the results, primary education in Ukraine during the invasion required teachers (n=495) to make significant changes in their work, namely shifts in schedules, increased workload, conducting remote lessons, providing tutoring for certain students, conducting crisis interventions with a broader range of subjects, and volunteering. The majority of the surveyed practitioners experienced considerable stress due to a significant increase in the amount of time they spent preparing their lessons. The psychological conditions of primary school teachers depended on the number of students who were expelled and new students who had been evacuated from other war-torn regions, the ability of school administrators to re-organize the work for online teaching, and perceived support from colleagues. All of these factors along with resilience were predictors of stress and burnout among teachers in wartime. Teachers experiencing burnout, especially exhaustion, high-stress scores, and low levels of resilience frequently evaluated the performance of their students with more leniency. In addition to a list of typical teachers’ roles (MiTeRoSA), teachers indicated frequently taking on the new roles of a ‘tutor’ and a ‘crisis counselor’ in response to the war.
Romanian Teachers` Needs and Training Pilot Programme to Implement SEE in a Whole School Approach
Authors: Botnariuc Petre Feodorian , Mironov Cosmina , Țibu Speranța Lavinia
Published: March 2023

School-based interventions to promote students’ social and emotional competences are more likely to be effective if they are organised as part of a systemic, whole-school approach. This framework implies intentional and coherent interventions embedded in the school context, where teachers play a key role as they are the primary delivery agents of social and emotional education. As research shows, the success of such interventions is directly linked to the teachers` training and their confidence to deliver relevant learning experiences that support the development of children’s social and emotional competences. Under the Erasmus+ project SEEVAL we investigated the Romanian teachers` needs and experiences related to the social and emotional interventions in the school environment, in order to better understand their needs and therefore to tailor a training programme and protocols of action for a whole-school social and emotional education approach. Within this article we will present the main results of the needs analysis in Romania (764 teachers/school counsellors and 3,667 students) and elements of the subsequent training programme which has been piloted with 41 teachers from 6 Romanian schools. Conclusions are drawn and reflections are made towards ways of improvement in relation to the implementation of a whole school approach to social and emotional education in Romanian schools.
Sleep Habits of Turkish Preschool Children
Authors: Alat Kazim
Published: March 2023

Purpose: This study aims to a) provide a detailed description of sleep habits and problems, b) to compare sleep habits and problems among 4-6-year-old typically developing Turkish children, c) to find out parental views on problem sleep behavior.
Methods: Participants consisted of 702 parents. Children’s age ranged from 4 to 6 years. Demographics Information Survey and the Children’s Sleep Habits Questionnaire (CSHQ) were administered to parents.
Results: Across different age groups bedtime was not different for weekdays. Bedtime during weekends, however, differed across different age groups. Older children were going to bed later. Wake-up time and bedtime for weekdays differed for children who attend preschool. Children attending preschool woke up earlier and went to bed earlier. Sleep duration did not differ for both weekdays and weekends. There was no gender difference in terms of bedtime, wake-up time, and sleep duration for both weekdays and weekends. However, girls’ daytime sleepiness scores and sleep onset delay scores were higher.
Conclusions: Sleep problems are prevalent among young Turkish children. Comparing the CSHQ overall and subscale scores of this study with other studies, the most important differences were seen in the bedtime resistance and the sleep anxiety subscales. These discrepancies indicate a cultural difference in bedtime resistance and sleep anxiety of Turkish preschool children. Future research should investigate the effects of parenting and discipline on sleep behavior and problems. Effective intervention programs are needed in order to reduce problems related to bedtime resistance and sleep anxiety of Turkish preschoolers.
Students' Perception Regarding the Cryptocurrencies
Authors: Morosan Adrian , Oprișan Oana , Stoica Eduard Alexandru , Tileagă Cosmin
Published: March 2023

Through our study, we studied the perception of the students of an economic faculty speciality which are at the end of their studies and who will soon become economists, and their attitude towards the cryptocurrencies. Their contacts inside or outside the university led to their professional development because they brought to their attention the widening of the sphere of finance through the prism of a new concept that appeared fifteen years ago, that of cryptocurrency. The main scope of the paper is to understand how students currently relate to cryptocurrencies, after going through all the subjects in the curriculum of their economic specialization. The methodology will involve the use of a structured interview.  Important results of our study will be related to the fact that the female students interviewed, who, unlike almost all of the female students, are or say that they will be involved in trading cryptocurrencies in the near future and to the fact that an important part of their information regarding the cryptocurrencies is obtained from outside the faculty. We will recommend, knowing the current situation of the interviewed students, to the teachers who teach various disciplines in the specialization of which the interviewed students are part of that they could try, in the situation where the taught subjects allow it, to offer to the students who will come in the following years additional information about the cryptocurrencies.
Art Therapy and Social Emotional Development in Students with Special Educational Needs: Effects on Anxiety, Empathy, and Prosocial Behaviour
Authors: Lavric Mariana , Soponaru Camelia
Published: March 2023

Although our research started before the pandemic, it seems that focusing on the social emotional development of our students has become a top priority, considering that, globally, the rates of anxiety among children and teenagers are, in the actual context of the pandemic and war, skyrocketing. One valuable way to promoting positive social emotional development is to implement in schools research-based programs that support students in strengthening their social and emotional competencies. Art therapy is one of the most suitable ways to serve this purpose, for it goes beyond words and gives the students the opportunity to deeper experience and process their emotions. This research used a structured group art therapy program to reduce anxiety and improve empathy and prosocial behaviour in 20 special educational needs students with neuro-psycho-motor deficiencies, aged between 8 and 11 years, who were randomly and equally assigned either to an experimental or a control group. The intervention was performed once weekly for ten weeks. Anxiety, empathy and prosocial behaviour have been measured using specific questionnaires filled out by the students’ caregivers at the beginning and at the end of the program. After ten weeks, the art therapy group showed a significant decrease in anxiety and a significant increase in empathy and prosocial behaviour. These findings suggest that art therapy might be used in an educational context to lower anxiety and to support the positive development of social emotional competencies such as empathy and prosocial behaviour in special educational needs children with neuro-psycho-motor deficiencies.
Imagining the End of Racism through Summer Camps
Authors: Theriault Daniel
Published: March 2023

In response to worldwide protests for racial justice in 2020 and 2021, Dustin et al. (2021) called on recreation professionals to eradicate racial oppression. The focus of the present commentary is on the tools through which such an eradication might be carried out within summer camps. In particular, this essay builds on the work of Mariame Kaba (2020) and the generations of activists of color before her (e.g., Kelley, 2002) to assert that imagination is essential to any effort to end racism in summer camps. Three areas to which our imagination might be applied are presented: the benefits of summer camp, the shift from I to we, and the courage to experiment and fail.
The Role of Extraversion in the Effectiveness of Leisure Coping on Depressive Symptoms
Authors: Nagata Shinichi , McCormick Bryan
Published: March 2023

Research suggests that leisure is as an effective coping strategy for depression. The foundational theory of lei-sure coping assumes that leisure coping can be benefi-cial in three ways: mood enhancement, diversion, and companionship. While theorists asserted that the above three strategies are universal, research suggests that the personality trait of extraversion is associated with leisure behavior and may affect the effectiveness of leisure cop-ing strategies. The current study aimed to examine the role of extraversion in the relationship between leisure coping and depressive symptoms. A total of 155 adults with depression (59 males and 96 females) were recruit-ed from four different depression-related venues and responded to an online survey. The results of multiple regression analyses found that extraversion did not affect the relationship of leisure palliative coping and mood en-hancement; however, it significantly moderated the rela-tionship between leisure companionship and depressive symptoms. While a significant negative association be-tween leisure companionship and depressive symptoms was found among extroverts, no significant relationship was observed among introverts. The results suggest that the personality trait of extraversion matters to leisure coping and should be considered to better facilitate rec-reational therapy interventions.
ZORA 151: Krležine nepokretne i pokretne slike
Authors: Lukács István
Published: March 2023

In his monograph Krleža’s Still And Moving Images, Prof. Dr. István Lukács, a Croatist and Slovenist living in Budapest presents the problem of intertextuality and intermediality in the work of the classic of Croatian literature, Miroslav Krleža from a comparative Hungarian cultural and literary point of view. In the first part of the monograph, through the analysis of concrete texts (several poems and the novel Flags), the author examines the problem of the reception of Ady's lyric poetry and Hungarian painting production (Dezső Orbán) at the beginning of the 20th century, while in the second, more extensive part, he scrutinizes Krleža's relationship to film. The author's thesis is that the new optical medium (film) played an important role in the formation of Krleža's early dramatic texts (Legends) at the beginning of the 20th century. These works were written in the writer's early youth, immediately after his return from Budapest, where he had studied at the military academy. The author rightly assumes and then proves in his monograph that Krleža was probably already familiar with silent film and Hungarian theoretical works on film at that time. Some authors have already published papers on Krleža's "sound film imaginings", but without a more detailed scholarly elaboration of the whole issue. The first expert to mention the possibility of applying the film technique to a stage production in his extensive essay on Krleža's early plays was Josip Bach, the director of the Drama theater in Zagreb, who refused to stage all of Krleža's plays. Bach's clear observation served as a suitable starting point for the monograph's author to analyse Krleža's Legends, not from the point of view of a possible theatrical staging, but from a possible cinematic inspiration, both in certain themes (Jesus, Salome, Christopher Columbus) as in the application of film poetry, especially in atypical stage directions. In recent decades, authors in contemporary literary theory on intermediality have often thematised the links between literary text and film, they analyse film adaptations of well-known literary works, and write about the filmicity, cinematic style and film poetry of specific literary works. According to the author's findings, all these stylistic elements are also found in Krleža's early works (Legends, symphonies), but the "cinematic language" is so distinctly present that it also structurally characterises these works. The author of the monograph uses the term kinotekst to refer to Krleža's particular stage directions and scenic solutions precisely because of the marking power of these elements. This literary-theoretical notion is an innovation that refers to certain parts of a concrete literary text, and is in fact perfectly adequate to the film cut. This means that certain segments in Krleža's literary text are a real film cut and function as such. It is a strange paradox, since literature is a verbal art and film is a visual art.
Por qué la vulnerabilidad importa. La relación entre masculinidad, emociones y vulnerabilidad en el ejercicio de violencia contra las mujeres en la pareja
Authors: De Stéfano Barbero Matías
Published: March 2023

A partir de una investigación en la que se realizó una observación participante en grupos psicosocioeducativos y entrevistas en profundidad con hombres que ejercieron violencia contra las mujeres en la pareja, este artículo analiza la relación entre masculinidad, emociones, vulnerabilidad y violencia. Se sugiere que la violencia masculina no solo está vinculada con el poder, sino que emerge como una resistencia a la vulnerabilidad ―entendida como una apertura al otro, a lo emocional y a lo incierto― que demandan los vínculos afectivos. La posición vulnerable es, al mismo tiempo, una posición que encuentra resistencia en los mandatos de masculinidad, pero también una posición necesaria para poder construir los conflictos sin llegar a la violencia. A partir de las experiencias de trabajo que permiten los grupos psicosocioeducativos, se pone de relieve la importancia de repolitizar las emociones y la vulnerabilidad como herramientas para el cambio social, y especialmente para transformar la relación de la masculinidad con la violencia.
Growth performance of Spirulina platensis in supernatant of digested rotten guava
Authors: Islam M. S. , Habib M. A. B. , Rahman M. H. , Arifuzzaman M.
Published: March 2023

This study was performed to evaluate the culture potentiality and growth performance of Spirulina (Spirulina platensis) in supernatant of three different concentrations of digested rotten guava (DRG) and Kosaric Medium (KM) as control. The study consisted of three different concentrations of rotten guavas, such as 20 (T1), 40 (T2) and 60 (T3) were allowed to digest under aeration. After 34 days, three replications showed the reddish white-colored supernatant screened and taken in a 2.0 L conical flask. Then, Spirulina was inoculated to grow in these three digested rotten guava media (DRGM) with the addition of micronutrients and KM and 9.0 g/L NaHCO3 for 14 days. The cell weight of Spirulina was attained at a maximum of 12.43±0.10 mg/L (dry wt. basis) in KM, followed by 0.818 ± 0.002, 0.815 ± 0.0014 and 0.809± 0.0011 mg/L in supernatant of 60, 20 and 40% DRGM, respectively on the 10th day of culture. A similar trend was also observed in the case of specific growth rates (based on cell weight and chlorophyll a) and total biomass (mg/L) of Spirulina. Cell weight of Spirulina had a highly significant (P<0.01) correlation with the chlorophyll a content (r= 0.746) and total biomass (r= 0.742) of Spirulina. The results on the growth performance showed that Spirulina grown in supernatant of 60% DRGM was significantly (P<0.01) higher (T3) than that of Spirulina grown in supernatant of 20% (T1) and 40% DRGM (T2).