bluuebunny/crossref_metadata_2025 huggingface dataset:
Análise da qualidade de vida no trabalho no setor industrial durante a COVID-19
Authors: Soares Juliana Meneses , Vasconcelos Cleiton Rodrigues de
Published: January 2023

A pandemia teve reflexos em diversos ambientes em caráter global, com reflexos nas condições de trabalho diante das mudanças desde a legislação sanitária a trabalhista. As empresas passaram a planejar suas políticas de produção e gerenciamento de colaboradores diante de várias restrições legais em prol da manutenção à saúde coletiva em seus ambientes produtivos. O objetivo deste estudo foi avaliar os aspectos relacionados a à Qualidade de Vida no Trabalho (QVT) de indústrias de pequeno, médio e grande porte durante a pandemia do COVID-19. O modelo de oito dimensões de Walton (1973), precursor nos estudos sobre QVT, foi adotado, contemplando questões desde o perfil dos respondentes, cenário sobre QVT e avaliação do desempenho e satisfação global. Das variáveis investigadas, 55,6% resultaram em satisfação e 44,4% resultaram insatisfação, considerando uma amostra de 64 respostas válidas e confiabilidade do instrumento de pesquisa de 92,51%. A dimensão integração social obteve o maior valor, refletindo na percepção dos colaboradores com as ações que as organizações empreenderam no período de pandemia. Entre os fatores de insatisfação, a dimensão trabalho e espaço total de vida, obteve o menor índice, destacando o anseio por demissões e dispensas e o desenvolvimento de ansiedade e/ou cansaço no trabalho, considerados fatores que afetaram a qualidade de vida dos colaboradores em virtude da crise sanitária da COVID-19.
Design Thinking aplicado a equipes remotas
Authors: Santana Gustavo Gouvea , Zancul Eduardo de Senzi
Published: January 2023

Uma tendência crescente em diversos setores tecnológicos é a descentralização das equipes de produto como maneira de captar os melhores talentos, reduzir custos e potencializar os benefícios da diversidade cultural. A aplicação de um processo pautado na colaboração presencial, como o Design Thinking, apresenta desafios ao ser transposta para aplicação em equipes distribuídas e remotas. A literatura apresenta uma coletânea de artigos relacionados a aplicação da metodologia de design em ambiente virtual, mas há uma lacuna no que se refere à aplicação do Design Thinking em equipes remotas intermediadas por ferramentas digitais de comunicação. O artigo propõe uma revisão sistemática de literatura utilizando o método PRISMA para identificação, tabulação e análise das publicações relevantes relacionadas ao tema proposto. Oportunidades de pesquisa são sugeridas em distintas frentes de estudo: impactos no processo do design, desafios da colaboração virtual e consolidação da realidade virtual como ferramenta de auxílio ao desenvolvimento de produtos.
Geração de resíduos plásticos durante a Pandemia de COVID-19
Authors: Silveira Milena Dreyer , Souza Mateus Henrique Gomes de , Silveira Luís Felipe Assenato , Peres Fernanda Araujo Pimentel , Baierle Ismael Cristofer , Medeiros Jorge Luis Braz , Corrêa Ricardo Gonçalves de Faria
Published: January 2023

A pandemia do Covid-19 enfatizou a importância do plástico para a sociedade, pois esse material foi essencial para a contenção do vírus e segurança da população. No entanto, as consequências são diversas devido a exacerbada utilização desse material e a sua má gestão. Nesse sentido, foi realizada uma revisão bibliográfica sistemática a partir de artigos publicados nas bases de dados Web of Science e Scopus. Foram obtidos 35 artigos, os quais foram analisados de forma quantitativa, a fim de apresentar uma análise bibliométrica, e de forma qualitativa os 10 artigos de maior relevância no tema de estudo foram sintetizados. Assim sendo, concluiu-se que os desafios para a economia circular, durante a pandemia, foram agravados com a redução das coletas seletivas e com a ausência de separação de muitos desses resíduos plásticos. Evidenciou-se também a falta de consciência e o desconhecimento da sociedade referente aos perigos ambientais que os plásticos causam, além dos impasses políticos e econômicos.
Cytostatic Effects of Avocado Oil Using Single-cell Gel Electrophoresis (Comet Assay)
Authors: Uthirapathy Subasini
Published: January 2023

The goal of this paper is to assess the mutagenicand genotoxic potentials of avocado oil made from the fruit pulp of Persea Americana, a member of the Lauraceae family.Michigan Cancer Foundation-7 (MCF-7) cells are used in the 3-4,5 dimethylthiazol-2yl-2,5-diphenyl tetrazolium bromide (MTT) test to examine the possible antiproliferative and cytostatic qualities of different doses of avocado oil, and MCF-7 cells are used in the comet assay to examine the potential cytostatic effects of avocado oil extracted from the avocado fruit. DNA in human breast cancer cells is partially damaged by avocado oil. However, DNA damage at low, medium, and high levels was discovered in the positive control. Without positive control, the DNA damage level falls in the low, middle, and high ranges. The MTT assay shows that avocado oil exerts a dose-dependent cytostatic impact on human breast cancer MCF-7 cells with an IC50 value of 379.2 μg/mL, which is the IC50 value that causes genotoxicity in the comet assay.
Using Multilingual Bidirectional Encoder Representations from Transformers on Medical Corpus for Kurdish Text Classification
Authors: Badawi Soran S.
Published: January 2023

Technology has dominated a huge part of human life. Furthermore, technology users use language continuously to express feelings and sentiments about things. The science behind identifying human attitudes toward a particular product, service,or topic is one of the most active fields of research, and it is called sentiment analysis. While the English language is making real progress in sentiment analysis daily, other less-resourced languages, such as Kurdish, still suffer from fundamental issues and challenges in Natural Language Processing (NLP). This paper experimentswith the recently published medical corpus using the classical machine learning method and the latest deep learning tool in NLP and Bidirectional Encoder Representations from Transformers (BERT). We evaluated the findings of both machine learning and deep learning. The outcome indicates that BERT outperforms all the machine learning classifiers by scoring (92%) in accuracy, which is by two points higher than machine learning classifiers.
Structural and Optical Properties of Cadmium Sulfide-doped Silver Deposited on Glass and Polymer Substrates by Chemical Spray Pyrolysis
Authors: Hamad Niaz H. , Faraj Mohammad G. , Taha Akram H.
Published: January 2023

This process of this paper is carried out using thechemical spraying method to produce homogeneous thin films ofpure cadmium sulfide-doped with silver at different percentagesof 1%, 3%, and 5% on glass and polyimide plastic substrates at300°C. The aim is to study the optical and structural properties of the samples and the effect of the silver doping rate on films producedwith these properties. Due to X-ray diffraction studies, all filmscreated had a hexagonal phase, and it was noticed that they had avery precise structure free of holes or cracks. The obtained crystalsize ranged between 22.74 nm and 55.05 nm for different substrates, and the prominent plane was (002). From the optical properties, all films exhibited transmission higher than 60%, thus showing a lowabsorption, which makes them be used as light-permeable layers in the Solar Cell system. In addition, emission peaks were revealed by photo luminescence spectra examination at wavelengths ranging between (542.94 nm) and (546.02 nm), which led to calculate the energy gap (Eg). of the produced films, ranged between (2.27 eV) and (2.28 eV) for the different substrates.
A Comprehensive Review on Microstrip Couplers
Authors: Rezaei Abbas , Yahya Salah I. , Nouri Leila
Published: January 2023

In this work, several types of microstrip couplers are investigated in terms of structure, performance and design methods. These planar 4-ports passive devices transmit a signal through two different channels. Designers' competition has always been in miniaturizing and improving performance of couplers. Some couplers have been offered with a novel structure, which is a special feature. A high-performance coupler should have high isolation and low losses at both channels. The channels are usually overlapped so that the common port return loss in these channels should be low. Among the couplers, those with balanced amplitude and phase are more popular. The popular mathematical analysis methods are even/odd mode analysis, extracting the information from the ABCD matrix and analyzing the equivalent LC circuit of a simple resonator. According to the phase shift value, couplers are classified as 90º and correct multiples of 90º, where a microstrip 0º coupler can be used as a power divider. Some couplers have filtering and harmonic elimination features that are superior to other couplers. However, few designers paid attention to suppressing the harmonics. If the operating frequency is set in according to the type of application, the coupler becomes particularly valuable.ABCD Matrix
Being a caregiver in the management of chronic mental illness: A phenomenological qualitative research
Authors: Kızılırmak Betül , Ertem Melike , Evren Kılıçaslan Esin
Published: January 2023

Research aim/problem: This research was performed to evaluate the caring experiences of caregivers’ of individuals diagnosed mental illness.
Method: This qualitative study was performed with 13 caregivers who care for individuals who had chronic mental illness at inpatient units and community mental health center of a hospital serving in the Aegean Region of Turkey. The data collection process was performed by introductory form, semi-structured interview forms were used during interviews as face-to-face in-depth interviews.
Results: The sample population was comprised of 13 caregivers. The participants’ average age was 45.6 (min: 29–max: 62), of which 5 were single, 8 were women, 2 had a graduate degree, 8 had children. Participants had an average of 10 years of caring period (min: 3- max:22) and %61.5 had a support during a patient care. According to the results, five themes were determined related to experiences of caregivers. Themes were “difficulties related to caring, experiences related to social life, experiences related to emotional issues, positive aspects and experiences related to family matters”. Subthemes of this study were controlling behaviors, treatment follow up, controlling disease symptoms, planning future, stigmatization, restrictions on social life, emotional expression, ambivalant emotion, crisis management, sharing similar experiences, effectiveness of education, family support, daily routines, family roles.
Conclusion: In this research, difficulties of the caregiving process are management of emotional and behavioral problems, maintaining treatment, stigma, social limitations, changes in family dynamics ve concerns about the future. Educational activities and sharing similar experiences with other caregivers were determined as positive experiences. Supporting caregivers in chronic mental illnesses can improve care quality by reducing the burden of care. It is important to plan effective interventions for caregivers, to implement psychoeducational programs and to provide home psychiatric care services.
Design and Optimization of a Rack and Pinion Type WEC Using an Auxiliary Vibrating System
Authors: Chand Avikash Kaushik , Nasrekani Farid Mahboubi , Mamun Kabir , Narayan Sumesh
Published: January 2023

Research on wave energy converters with Rack and pinion type Power Take-Off (PTO) has been increasing over the last few years. A few control methods are used to optimize the performance of the said Wave Energy Converters (WECs). This paper presents a novel auxiliary vibrating system that can be implemented to improve the power input to a wave energy converter with a rack and pinion type PTO in regular waves. The design of the WEC system includes a floater, a double rack and pinion arrangement, a vibrating system, and a Mechanical Motion Rectifier (MMR) consisting of two one-way bearings that can convert the bidirectional wave motion to a unidirectional rotation of the output shaft. Once the waves move the floater upwards, this compresses the vibrating system which absorbs some of the energy and then the vibrating system helps the floater return to its original position by releasing the stored energy. The vibrating system also serves as a control method for limiting rack movement, so the impact of the waves is not detrimental to the system. This article aims to approximate the optimized power input to the system and investigate whether the implementation of a novel vibrating system improves the system power input. Allowing the WEC’s natural frequency to reach the wave’s natural frequency is important as it allows for maximum power absorption. The use of vibration systems to tune the WEC’s natural frequency close to the waves’ is novel and serves as the main factor in choosing this research. The WEC was modeled as 2 spring mass damper systems. Then the characteristic equations of the systems were extracted from the equations of motion and solved analytically to obtain the responses. One-factor-at-a-time (OFAT) method together with two different algorithms (Genetic and Multi-Start algorithms) from MATLAB code were used to optimize the response. The optimized power input to the system was then approximated. For system one, the maximum amplitude of the response was seen at a system mass of 500 kg and stiffness in the range of 100<k<240 N/m. The same was achieved for system two at a system mass of 500 kg and stiffness in the range of 100<k<138. The effect of the stiffness and mass on the response and input power has also been discussed.
Indigenous knowledge in traditional production of rice: Impact on food security in the upland households in Ifugao, Philippines
Authors: Codamon-Dugyon Eva Marie
Published: January 2023

Indigenous knowledge is essential to the survival of highland farming across the world. In the Philippines, the Ifugao indigenous people have a long history of rice farming which is intertwined with their indigenous knowledge and cultural identity, particularly the Ifugao Rice Terraces (IRT). Their traditional practices of rice production entails the use of indigenous knowledge. The investigation included a number of conventional processes, ranging from land preparation through harvesting and even the planting season. It is clear that Ifugaos continue to grow native rice in the region in the customary manner. It is noteworthy because Ifugao is having food security challenges, thus 82 percent of people believe that there is a high risk of food insecurity, and 70.20 percent believe that rice output is insufficient based on yearly rice production. 51.2 percent felt that even though there is food insecurity, they would not go hungry.
Impact of foaming conditions on quality for foam-mat drying of Butterfly pea flower by multiple regression analysis
Authors: Nguyen Minh Thuy , La Bao Phung , Ngo Van Tai , Vo Quang Minh
Published: January 2023

In recent years, the Butterfly pea flower has been increasingly interested in its color and function. However, the preservation of the extract faced many difficulties; therefore, foam drying technology was applied to solve this problem. The study was conducted to determine the effect of foaming conditions, including albumin ratio, carboxymethyl cellulose (CMC) ratio, and whipping time on foam characteristics. At the same time, the multi-dimensional regression method was also used to determine the most suitable foaming conditions for the following process. The research results showed that all 3 factors strongly influenced the foaming process of pea flower extract. It could be concluded that the most suitable condition for foaming is to use 9.3% albumin, 0.79% CMC and stir for 19 min. Under these conditions, the foam expansion and stability were 584.79% and 96.44% respectively. The powder obtained from the foam drying of Butterfly pea flower extract was also analyzed for quality. The temperature of 65 oC for 4 hrs gave relatively high-quality powder with protein content, anthocyanin and antioxidant activity of 9.89 g/100g, 1.15 mg/g and 87.34% respectively. In conclusion, the foam-mat dried powder from butterfly pea flower extract is suitable for other processing processes, especially in the processing of folk cakes, pasta and bread industry.
Evolutionary Insights into the Enzymes involved in the Biosynthesis of the Volatile Organic Compounds Isoprene and Pinene in Plants
Authors: Bhattacharya Arunima , Bhowmick Pragyasree , Ganguli Sayak , Mitra Arup Kumar
Published: January 2023

Volatile organic compounds (often abbreviated as VOCs) are emitted as secondary metabolites by plants, and contribute to a wide range of ecological processes, owing to their pivotal role in plant interactions with biotic and abiotic variables. As a result, they differ greatly between species and explain disparities in ecological strategy. In an effort to comprehend their genesis and assess potential evolutionary trends, this work probes into the enzymatic pathways that lead to their synthesis. Correspondingly, we adopt and propose an in-silico approach to analyze connections between the species evolution and the gene evolution of two major plant volatile organic compounds. We lay focus on isoprene and pinene, volatile organic compounds synthesized by two common yet compartmentally isolated pathways - the methylerythritol phosphate (MEP) pathway and the mevalonic acid (MVA) pathway, respectively. Analyses of gene-specific and protein-specific phylogenetic trees of the enzymes involved in these pathways thereby indicate a mixed trend in the evolution as per the APG IV (Angiosperm Phylogeny Group IV) system. These results and the in-silico pipeline thus provide us with future opportunities to explore different networks of plant communication for a holistic understanding of intraspecific and interspecific interactions in different natural ecosystems.
Modulation by S-nitrosoglutathione (a natural nitric oxide donor) of photosystem in Pisum sativum leaves, as revealed by chlorophyll fluorescence: Light-dependent aggravation of nitric oxide effects
Authors: Saini Deepak , Baptala Ramesh B , Pandey Jayendra , Aswani Vetcha , Sunil Bobba , Gahir Shashibhushan , Bharath Pulimamidi , Subramanyam Rajagopal , Raghavendra Agepati S
Published: January 2023

The reported effects of nitric oxide (NO), a signaling molecule, on the photochemical components of leaves are ambiguous. We examined the changes by a natural NO donor, S-nitrosoglutathione (GSNO). The effect of GSNO on Pisum sativum leaves was studied after a 3-hour exposure in dark, moderate (ML), or high light (HL). The NO levels in GSNO-treated samples were at their maximum under HL, compared to those under ML or dark. Most of the elevated NO was decreased by 2-4-carboxyphenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (cPTIO), a NO scavenger, confirming the NO increase. Treatment with GSNO caused inhibition of photosynthesis/respiration and restricted electron transport mediated by both photosystem (PS)II and PSI. However, the inhibition by NO-donor of PSII components was stronger than those of PSI. A marked increase in the PSI acceptor side limitation [Y(NA)] and a decrease in PSI donor side limitation [Y(ND)] indicated an upregulation of cyclic electron transport, possibly to balance the damage to PSII by GSNO. We suggest that NO aggravated the HL-induced inhibition of photosynthesis and dark respiration.
A simplified analysis of the Feynman pallet and ratchet mechanism considering different forms of generated power
Authors: Ladino-Luna Delfino , Chimal-Eguía Juan C. , Pacheco-Paez Juan C. , Páez-Hernández Ricardo T.
Published: January 2023

In this paper, we analyze the advanced Feynman’s mechanism from the well-known Feynman’s Lectures on Physics, under the maximum power output, maximum efficient power, and maximum power density criterion. Considering this mechanism like a thermal engine, and using a simplified model, the physical existence regions for these objective functions are shown. We also show their comparison for given values of a defined dimensionless parameter. The behavior for each case of both the general and the normalized forms of the objective functions is compared graphically and the existence of certain intervals of values for the variable parameter used, in which the relation of these objective functions change, is determined. Additionally, it is shown that as the numerical value of the mentioned variable parameter used approaches zero, the area of the region of physical existence of the objective functions is greater. The results of the mentioned comparison are discussed, and appropriate conclusions are included.
Akıllı Telefon Bağımlılığı: Kişilik Özellikleri Açısından Bir Değerlendirme
Authors: BERBER ÇELİK Çiğdem
Published: January 2023

Teknolojinin gelişmesi ile birlikte ortaya çıkan ve davranış problemleri arasına eklenen sorunlardan biri de akıllı telefon bağımlılığıdır. Söz konusu bağımlılık türü özellikle gençler arasında yaygın olup derinlemesine araştırılması gereken güncel bir sorundur. Bu araştırmada da akıllı telefon bağımlılığını kişilik özellikleri açısından incelemek amaçlanmıştır. Bu amaç doğrultusunda akıllı telefon bağımlılığı ile kişilik özellikleri alt boyutları arasındaki ilişki tespit edilip kişilik özelliklerinin akıllı telefon bağımlılığını yordayıp yordamadığı araştırılmıştır. Araştırma grubu, 254 kadın ve 172 erkek olmak üzere toplam 426 Türk üniversite öğrencisinden oluşmaktadır. Araştırmada veri toplama aracı olarak, Kişisel Bilgi Formu, Akıllı Telefon Bağımlılığı Ölçeği- Kısa Formu ve Beş Faktör Kişilik Envanteri kullanılmıştır. Veriler, Pearson momentler çarpım korelasyon katsayısı ve çoklu doğrusal regresyon analizi teknikleri kullanılarak analiz edilmiştir. Araştırma bulguları, akıllı telefon bağımlılığı ile nevrotiklik, öz-disiplin ve uyumluluk arasında pozitif yönde anlamlı bir ilişki olduğunu; akıllı telefon bağımlılığı ile dışa dönüklük ve gelişime açıklık arasında anlamlı bir ilişki olmadığını göstermiştir. Ayrıca beş faktör kişilik özelliklerinin akıllı telefon bağımlılığı toplam varyansının %8’ ini açıkladığı da bulgular arasında yer almaktadır. Ortaya çıkan bulgular benzer araştırma bulguları ile desteklenerek yorumlanmıştır.
A Rare association of Mauriac syndrome and Van-Wyk Grumbach syndrome found in a young Saudi girl with poorly controlled type 1 Diabetes and Hypothyroidism: A Case Report and Brief literature review
Authors: Al Jabri Aida , Al Johar Aeshah , Yacoubi Mohamed Tahar
Published: January 2023

Type 1 diabetes mellitus (T1DM) is an autoimmune disease characterized by insufficient insulin production of the pancreatic beta-cells. Patients with T1DM will have a higher risk of other autoimmune disorders like celiac and thyroid diseases. Hypothyroidism is the failure of the thyroid gland to secrete an adequate amount of thyroxine, which is required for physical growth, brain development, and cellular metabolism. Most studies reported that children with T1DM have a higher incidence of hypothyroidism than normal children, with 9.6% having hypothyroidism and 19% having positive anti-TPO antibodies. Hypothyroidism will aggravate the condition in a child with T1DM and vice versa. Uncontrolled diabetes for a long time might increase insulin resistance due to complete depression of the hypothalamus-pituitary thyroid axis. A rare complication of poorly controlled T1DM is Mauriac syndrome, characterized by elevated liver enzymes, hyperlipidemia, cushingoid features, growth retardation, and hepatomegaly due to glycogenic hepatopathy. Van Wyk–Grumbach syndrome is also a rare complication of long-standing, untreated hypothyroidism, manifested by breast development, multicystic ovary, uterine bleeding associated with lack of pubic and axillary hair growth, and delayed bone age. Here, we report a case with two rare complications of Mauriac syndrome and Van Wyk–Grumbach syndrome in a child with hypothyroidism and poorly controlled T1DM.
Estimation of the potential of low grade heat sources for heat pump plants in district heating systems
Authors:   Institute of General Energy of the National Academy of Sciences of Ukraine, 172 Antonovycha str., Kyiv, 03150, Ukraine, Derii Volodymyr , Sokolovska Irina ,   Institute of General Energy of the National Academy of Sciences of Ukraine, 172 Antonovycha str., Kyiv, 03150, Ukraine, Teslenko Oleksandr ,   Institute of General Energy of the National Academy of Sciences of Ukraine, 172 Antonovycha str., Kyiv, 03150, Ukraine
Published: January 2023

Methodology and calculation formulas are proposed for estimating the thermal potential and its distribution by the regions of Ukraine for natural and artificial (anthropogenic) low-grade heat sources: ambient air, ventilation emissions of buildings connected to district heating systems, soils and groundwater, large rivers, wastewater, waste heat of boilers and CHPs, and industrial waste heat. The availability of thermal potential of these sources for heat pump plants of district heating systems has been determined. Annual heat potential and average annual capacity were estimated for each of these sources. It is shown that the annual heat potential and average annual capacity available for heat pump plants in district heating systems are: 9,735 thous. Gcal and 905 MW for ambient air; 25,655 thous. Gcal and 1,871 MW for ventilation emissions of buildings; 2,628 thous. Gcal and 87 MW for soil and groundwater; 3,212 thous. Gcal and 299 MW for large rivers; 4,545 thous. Gcal and 338 MW for wastewater; 2,459 thous. Gcal and 724 MW for waste heat of boilers and CHPs; 7,661 thous. Gcal and 214 MW for industrial waste heat, respectively. The total thermal potential of the above-mentioned sources is 4.97 GW which enables the use of heat pump plants in district heating systems with a total capacity of about 7.5 GW. In the case of heat pump plants using low grade heat sources of natural origin, it must be taken into account that their intensive use can lead to their rapid thermal exhaustion and a significant impact on the environment. Therefore, it is necessary to maintain such level of energy use of natural low grade heat sources that would enable their exploitation without harming the environment. In the conditions of densely built-up cities of Ukraine, the use of heat of the soil and groundwater for heat pump plants will be limited due to the shortage of free land plots. It will also be problematic to use powerful air heat pump plants in populated areas due to their high noise level. Keywords: heat pump plant, district heating systems, low grade heat source, thermal potential
Mathematical model for forecasting hydrocarbon production based on time dependences of development periods of oil and natural gas fields
Authors:   Institute of General Energy of the National Academy of Sciences of Ukraine, 172 Antonovycha str., Kyiv, 03150, Ukraine, Kaplin Mykola , Bilan Tetyana ,   Institute of General Energy of the National Academy of Sciences of Ukraine, 172 Antonovycha str., Kyiv, 03150, Ukraine, Makarov Vitalii ,   Institute of General Energy of the National Academy of Sciences of Ukraine, 172 Antonovycha str., Kyiv, 03150, Ukraine, Perov Mykola ,   Institute of General Energy of the National Academy of Sciences of Ukraine, 172 Antonovycha str., Kyiv, 03150, Ukraine
Published: January 2023

An optimization model for forecasting hydrocarbon production in uncertain information conditions regarding the prospects for the development of natural gas and oil resources and reserves is proposed. The model is based on the presentation of options for the development of active fields with approximate dependences of the volume of potential annual production on the implemented measures and technologies for increasing the efficiency of gas extraction, as well as statistical information on the distribution of new fields by the reserves and depths volume of occurrence with the corresponding costs for the field’s development. In order to take into account the characteristic patterns of exploitation of natural gas and oil fields in the objective of forecasting the development of the relevant sectors of the country's economy, approximate time dependences of the production volume of a hydrocarbon field during a limited period of its development are proposed. The method of using sets of binary variables to represent the non-smooth and non-linear dependences of hydrocarbon resource extraction volumes on time during the periods of field development is presented. The optimization approach basis to the problem of forecasting the development of the oil and gas production industry regarding the substantiation of the expedient terms of putting new natural gas and oil fields into operation, taking into account the possibilities of intensifying the production of existing fields, is proposed. The optimization model for forecasting hydrocarbon production can be considered as a methodical tool for developing programs for the development of oil and gas production in the country in the context of solving applied planning problems. The calculations result of forecast volumes of natural gas production, obtained using the developed software and information support of the model, are presented. The implemented algorithms of non-linear optimization made it possible to form a volume forecast of natural gas production in Ukraine for the period until 2040, which takes into account the types of natural gas deposits available in the country and the possibility assessment of their development over time. Keywords: gas industry, forecasting, mining, technology, production forecasting model
Software and information complex for district heat supply systems modeling
Authors:   Institute of General Energy of the National Academy of Sciences of Ukraine, 172 Antonovycha str., Kyiv, 03150, Ukraine, Denysov Viktor
Published: January 2023

Software and information complex for modeling of the heat supply systems functioning, which allows ensuring the optimal selection of aggregates and their operation modes. It will ensure the production and redistribution of energy in accordance with the schedule of consumers. Simulation of optimized operating modes of a self-sufficient heat supply system for a cottage village based on local energy resources and with minimal use of external energy sources was performed. The use of the software and information complex made it possible to calculate the parameters that provide optimized coverage of the heat load schedule of the cottage village based on local energy resources. The simulation performed using the example of the predicted values of the installed thermal capacity of the power units and the actual ambient temperature schedule. The developed new software and information complex provides an opportunity for hourly simulation and research of optimal modes of operation of heat units of autonomous heat supply systems. In the developed software and information complex, a model of optimization of operating modes is applied, which belongs to the class of problems of optimal loading of generating capacities of power systems with the criterion of minimizing costs for production, accumulation and consumption of heat and electricity. An example of simulation results using the heat load schedule for the selected day of March 20, 2018 is given. The obtained results indicate a decrease in the specific cost of hourly heat supply with an increase in the part of thermal energy supplied at the expense of renewable energy sources, and accordingly, a decrease in the part of gas, and in the general case of any other generation based on fossil fuel technologies, in the total volume of heat supply. Thus, the effectiveness of the use of renewable energy sources based on local energy resources as part of the heat supply system of the cottage village confirmed. Keywords: autonomous heat supply, efficiency of renewable energy sources based on local energy resources
Coatings properties Cr-Si-B-MgC2 in high conditions temperatures Language: Ukrainian
Authors:   Institute of General Energy of the National Academy of Sciences of Ukraine, 172 Antonovycha str., Kyiv, 03150, Ukraine, Shchepetov Vitalii , Kovtun Svitlana ,   Institute of General Energy of the National Academy of Sciences of Ukraine, 172 Antonovycha str., Kyiv, 03150, Ukraine, Kharchenko Serhii ,   Institute of General Energy of the National Academy of Sciences of Ukraine, 172 Antonovycha str., Kyiv, 03150, Ukraine
Published: January 2023

Heat resistance, as well as friction and wear of composite coatings Cr–Si–B–MgC2 under conditions of elevated temperatures implemented in friction pairs, were investigated. The selection of the Cr–Si–B–MgC2 composition and its optimal composition for spraying wear-resistant coatings loaded with friction at high temperatures are substantiated. Indicated the main influence on the properties, structure, and stability of heterogeneous coatings is exerted by alloying elements at certain concentrations, as well as technological parameters of coating application. It has been established that silicon and boron contribute to the formation of complex-alloyed high-temperature formations with increased wear resistance. The microhardness of coatings correction is realized due to the silicon percentage content, while the mechanical properties of the material are increased by additional doping with boron and magnesium carbide. The parameters of sputtering of coatings are also important, on which the formation of a heat-resistant layer directly depends. It was experimentally established that the ratio of consumption of acetylene and oxygen ~20/25 l/min ensures the stability of technological parameters of sputtering, homogeneity of the chemical composition and constancy of coating properties. At a load of up to 5.0 MPa, a sliding speed of up to 1.2 m/s and a temperature of up to 700С, the coatings of the Cr–Si–B–MgC2 system show stable structural adaptability, which ensures the minimization of friction and wear parameters. Metallographic analysis and profilography of the samples indicate that there are no visible damages on the friction surfaces, and individual sticking points are localized in thin film surface layers. It was established that the dependence of the microhardness of the surface structures on the temperature is monotonic, but jumps are also observed if polymorphic transformations or transformations of metastable states into more stable and stable ones during heating and cooling occur. Microhardness indicators are uniform because particles of inclusions and impurities are dissolved in the oxide structures, which significantly affect the microhardness, and therefore, the properties of oxides of both simple and complex compositions. Keywords: protective coatings, surface layer, resistance to oxidation, wear resistance, heat resistance
A stochastic and dynamic approach in simulating spread processess of malwareof automated energy facilities and their systems
Authors:   Institute of General Energy of the National Academy of Sciences of Ukraine, 172 Antonovycha str., Kyiv, 03150, Ukraine, Khaidurov Vladyslav
Published: January 2023

The rapid development of information technologies in today's conditions makes it possible to control and automate processes and enterprises, institutions to ensure the correct and efficient operation of various energy systems. The mathematical apparatus used in the software for such objects and systems makes it possible to manage their states in various regular conditions. Sometimes unpredictable factors arise in the operation of energy facilities, which can lead to global catastrophes not only for a particular region, but also for all of humanity is the deliberate damage to the logic of the software that controls all the processes of the power system is one of these factors, for the purpose of terror or other malicious purposes. Such factors require the construction of models with which it is possible to predict the scale of risk and extent of damage, as well as to obtain a general estimate of the costs of protecting power system software against such malicious actions. An optimization mathematical model and a corresponding description of the implementation of a complex software tool for modeling the spread of malicious software (malware) in modern energy facilities and systems is the result of the work. The developed optimization mathematical model is based on the use of methods of optimization of functions and functionals with restrictions in the form of systems of ordinary differential equations with given corresponding initial conditions. To develop process simulation software modules based on the PSIDR mathematical model, stochastic population methods, models and algorithms were used to determine the control parameter at each time step. The use of such optimization methods and algorithms makes it possible to solve more complex tasks. It requires a procedure for predicting the spread of processes of various origins in general. The developed mathematical model consists in the minimization of costs for the purchase of antiviruses for the protection of relevant systems in energy facilities and systems. Keywords: malware, prediction, optimization, stochastic model, deterministic model, cellular automaton, energy objects
Overview of european trends in electric vehicle implementation and the influence on the power system
Authors:   Institute of General Energy of the National Academy of Sciences of Ukraine, 172 Antonovycha str., Kyiv, 03150, Ukraine, Kostenko A.P.
Published: January 2023

An overview of the trends in the development of electric transport in European countries is presented, including the state and tax policy of supporting electric transport owners, the dynamics of the growth of the European fleet of electric vehicles, the development of charging infrastructure and the main principles of the interaction between electric vehicles and power system. The experience of countries that have successfully developed electric transport was reviewed, and it was found that the demand for electric cars mostly depends on the price of electric cars for the end user, infrastructure development and government incentive programs. The review also showed that, in practice, the wide spread of electric vehicles should occur simultaneously with the development of the corresponding infrastructure, as well as the development of systems for their interaction with the energy system and compliance with global environmental standards. The growing number of electric vehicles certainly requires special attention from network and power system operators, because the appearance of charging stations of various manufactures and capacities, installed in residential areas, private and apartment buildings, can lead to the number of problems, the emergence of which is associated with electromagnetic compatibility, overloading of electric cables and distribution transformers, safety of operation, that as a result can negatively affect the reliability and quality of power supply. There is also the potential risk that with a certain number of EVs, there will not be enough existing generation capacity and capacity of the electricity grid to charge EV batteries. The analysis of the principles of interaction between electric vehicles and power system in Europe showed that they are based on the concept of Smart Grid - smart or intelligent power supply networks, by means of which the electric vehicle charging system can be managed by the energy supplying company in order to solve a number of energy system tasks: increasing the efficiency of network infrastructure using, peak load shift and the development of smart grid infrastructure. Keywords: electric vehicle, electric charging station, charging infrastructure, power system, environmental requirements, the Smart Grid concept
Laparoszkópos antirefluxműtétek hatása a gastrooesophagealis refluxszal járó tünetekre és a betegek életminőségére.
Authors: Kovács Balázs , Csucska Máté , Ozorai Lilla , Lóderer Zoltán , Juhász Árpád
Published: January 2023

Bevezetés: A refluxbetegség a fejlett világban endémiás,
civilizációs betegség. Kezelésében a megfelelően kivitelezett
hiatusrekonstrukció, valamint antireflux-plasztika kiemelkedő hatékonyságú
terápiás lehetőség. Mivel a műtéti beavatkozás célja alapvetően az életminőség
javítása, másodlagosan a szövődménymegelőzés, a szubjektív panaszok változásának
követése és kiértékelése kimagaslóan fontos e műtéti típus alkalmazásakor.
Célkitűzés: Tanulmányunkban 2015. 12. 01. és 2020. 12. 31.
között refluxbetegség kapcsán hiatusrekonstrukción, antireflux-plasztikán
átesett betegek műtét előtti és műtét utáni, refluxbetegséghez társult
életminőségét kívántuk elemezni. Módszer: Kérdőíves lekérdezést
végeztünk prospektív módon, pre- és posztoperatíven egyaránt. A legfőbb vizsgált
paraméterek a következők voltak: a mellkasi égő fájdalom mértéke, nyelési
nehezítettség, gyomortartalom-visszaáramlás, mellkasi fájdalom, hányingerrel és
hányással kapcsolatos panaszok, puffadás, a fenti panaszok miatt alkalmazott
gyógyszerelés. Értékeltük továbbá a páciensek testtömegváltozását és az
antirefluxgyógyszerek esetleges alkalmazását is. Eredmények: 65
beteg pre- és posztoperatív kérdőívét dolgoztuk fel. A fenti szubjektív panaszok
mindegyike csökkent a posztoperatív utánkövetés idejére, a nyelési nehezítettség
kivételével statisztikailag is szignifikáns módon. Minimális testtömegcsökkenést
regisztráltunk. A savcsökkentő gyógyszerek alkalmazásának aránya jelentősen
csökkent a műtétet követően. Megbeszélés: Műtéti eredményeink –
a betegek műtét utáni elégedettségét, valamint életminőségük javulását vizsgálva
– az ezen betegek ellátására szakosodott központok eredményeinek megfelelőek.
Munkacsoportunk sikerrel adaptálta a refluxbetegség diagnosztikus és terápiás
algoritmusait a helyi viszonyokhoz. Következtetés: A
laparoszkópos hiatusrekonstrukció és a Toupet szerinti antireflux-plasztika
megfelelő műtéti javallat mellett igen hatékony eszköz a refluxbetegséghez
társult panaszok csökkentésében és az életminőség javításában. Orv Hetil. 2023;
164(2): 57–63.
Development of coordination abilities of fencers aged 10-12 years living in the territory of martial law
Authors: Kryventsova Iryna , Potop Vladimir , Prusik Krzystzof , Samoilov Dmytro
Published: January 2023

Background and purpose. Success in sports activities is determined by various criteria, among which the level of development of coordination abilities stands out. The initial stage of training young athletes is important for the development of coordination abilities. At the same time, the martial law in the territory of residence of the athletes entails the need to ensure the safety conditions of life. Forced relocation of young athletes to safer places of residence presents coaches and parents with other training conditions. The purpose of the research is to identify opportunities for the development of special coordination abilities of young fencers aged 10-12 years in crisis situations caused by martial law.
Material and methods. Young fencers (n=16, age – 10-12 years, Kharkiv, Ukraine) took part in the study. The participants were divided into 2 groups – the experimental group (EG, n=8) and the control group (CG, n=8). The selection of groups took place depending on the possibility of compact accommodation of at least 8 athletes in one place and the possibility of training. The groups studied three times a week for 3 hours. The control group studied according to the standard program of the fencing department of the sports school. The experimental group studied according to the author’s program. The study lasted 6 months. Parents gave their consent for their children to participate in the experiment.
Results. The extremely difficult conditions of conducting the research had a significant impact on the result. The effectiveness of the developed program for improving the level of coordination abilities of 10-12-year-old fencers has been proven. At the end of the study, positive changes occurred in both groups.
Conclusions. It is recommended to use video media of communication to correct plans for preparing and performing tests. The focus of the training program for athletes should be focused on increasing the amount of load that can be performed at home. Ensuring safety conditions for young athletes and coaches is a mandatory condition for training.
Improving the special motor qualities of experienced female volleyball players living on the territory of martial law
Authors: Iermakov Sergii , Boichuk Roman , Strelnykova Yevheniia , Wnorowski Krzysztof , Zakharova Sofia
Published: January 2023

Background and purpose. The training of athletes in conditions of limited freedoms (COVID-19 pandemic and martial law in the territory of residence) does not allow for the full training of athletes in team sports. The purpose of the study is to determine the organizational forms and means of training sessions aimed at improving special physical qualities under martial law.
Material and methods. The study involved experienced volleyball players of one team (n=12). Volleyball players live in the territory of martial law (Kharkiv, Ukraine) and the restrictive measures of the COVID-19 pandemic. The experiment was carried out for 6 months in 2022 during martial law in Ukraine. The organization of the training was carried out with an emphasis on independent individual work. Pedagogical testing was carried out. 5 test exercises were used: each volleyball player performed independently. Volleyball players are offered an individual training plan that takes into account: safe living conditions (presence of special shelters – underground metro stations near the place of residence, special shelters, basements of houses, etc.); availability of electricity and means of communication (mobile, Internet); availability of means of life support (drinking water, food).
Results. It was determined that the team is homogeneous only in the test exercise “long jump from a place”. The indicators of the other four tests indicate the heterogeneity of the group of volleyball players. The use of the ZOOM videoconference to monitor the performance of tests by volleyball players under martial law has been substantiated.
Conclusions/ Exercises for the development of certain physical qualities of volleyball players are proposed. Also, schemes of remote self-training are proposed to level the heterogeneity of the group.