bluuebunny/crossref_metadata_2025 huggingface dataset:
«Lo personal es político». Patrones de construcción de género en la Transición española. Daniela Astor y la caja negra, de Marta Sanz
Authors: Somolinos Molina Cristina
Published: July 2023

En el marco de los denominados «nuevos realismos», Daniela Astor y la caja negra aborda la particular manera por la que las mujeres hubieron de enfrentarse a las contradicciones del periodo de la transición a la democracia en España. El análisis de la construcción de la identidad de género en el ámbito de lo personal y la transformación de esta identidad individual en conciencia política en la novela permite establecer relaciones entre las dinámicas de la sociedad española de 1978 en cuanto a la redefinición de los derechos de las mujeres a partir de la defensa del cuerpo.Palabras clave: Nuevo realismo; género; Transición; Marta Sanz; Daniela Astor y la caja negra
La búsqueda del paraíso inexistente en Los mares del Sur de Manuel Vázquez Montalbán
Authors: Álvarez de la Cruz María
Published: July 2023

Este trabajo es una aproximación al fenómeno del desencanto ante la Transición Española, a través de la novela del ciclo carvalhiano, Los mares del Sur. Montalbán recorre literariamente la ciudad para descubrirnos la imposibilidad de construir un futuro, por los crímenes y desigualdades que seguirán perviviendo en la sociedad que emerge del posfranquismo. La investigación propuesta por el autor se articula en varias capas que componen un cuadro de la sociedad barcelonesa y de la española en su conjunto. La novela extrapola la huida y frustración de un personaje a la de todo un país.Palabras clave: Vázquez Montalbán, Los mares del Sur, novela policiaca española, Transición Española, literatura de la memoria
Vakarų literatūros recepcija XX a. II pusės lietuvių poezijoje: atviros tapatybės konstrukcijos
Authors:   , Bagdonė Karolina
Published: July 2023

Reception of Western literature in the Lithuanian lterature of the second half of the twentieth century: constructs of open identity
Miokardito ir dilatacinės kardiomiopatijos molekulinių mechanizmų tyrimai
Authors:   , Rinkūnaitė Ieva
Published: July 2023

Study of molecular mechanisms of myocarditis and dilated cardiomyopathy
An Unconventional Look at a Historical Monograph. Analysis with Artificial Intelligence (AI) Tools
Authors: Jarzyńska Katarzyna
Published: July 2023

Goal and theses: The article aims to check the applicability of methods based on processing large sets of information in research in social sciences.

Conception/research methods: The dynamic development of new research methods based on the automated processing of large data sets using artificial intelligence (AI) means that they are used in an increasingly wide range of disciplines, going beyond the field of exact and natural sciences. Text mining was combined with available CLARIN web applications and keyword extraction and analysis strategy, a combination of the YAKE! written in Python with the VOSViewer program for the visualisation of bibliometric networks.

Results and conclusions: The study showed how automatic keyword extraction creates opportunities in social science research. The use of CLARIN and Google Pinpoint web tools in the analysis significantly facilitates working with a large body of texts and accelerates its analysis.

Cognitive value/originality: The study indicates new research methods that can contribute to the development of social sciences. The perspectives for the implementation of the ways of dealing with large data sets are presented in work in research on society, and conclusions regarding the development of digital social sciences are formulated.
Winter Olympic Games in Lithuanian Media
Authors: Žičkevičiūtė - Ahmed Evelina
Published: July 2023

The Winter Olympics Games is the most important sports event which is reported in Lithuanian media. There are no researches which would show how Lithuanian sports journalists publicate news about Winter Games. The first task is to find out the concept of media, tthe functions and tasks of media, genres and titles of media texts. The second task is to discuss the Winter Olympics and sports media functions. The third task is to elucidate the models of agenda setting and framing theories. The fourth is to perform quantitative and qualitative analysis of content research. In order to implement the first, second and third tasks, an analytical descriptive method is used. In order to implement the fourth, the methods of quantitative and qualitative analysis of the content are used. The results of the research examining the relationship between agencies and authorial publications in the online news dailies Delfi.lt and Lrytas.lt published the most agency news. Sports journalists used the most used the interview genre – 116 times. It turned out that sports journalists mostly published news about Lithuanians competing in the Olympics, rather that foreign athletes. It became clear that sports journalists, when writing publications about Lithuanian athletes used expressive headlines at the Winter Olympics. Analyzing the tone of the presentation of expressive headlines, it became clear that mostly used the negative tone in their authorial publications about Lithuanian athletes.
Where is the Gay? Names of Spaces in the Polish Gay Zines and Magazines
Authors: Nowak Tomasz Łukasz
Published: July 2023

The circulation of zines and the first gay magazines is treated as one of the most important elements of alternative communication. Zines created an opportunity for gay communities to communicate, which in the 1980s and 1990s was clearly difficult, and in small towns even impossible (communication via the Internet began to be discussed only in the mid-1990s). That is why the press became a kind of gay news agency, a platform for the exchange of information and experiences, and, most importantly, a record of the language of the non-heterosexual communities at the time. The aim of the article is to present a fragment of their reality: the space written in gay magazines, their names and the codes and behaviors associated with them. In my research, I have referred to M. Foucault’s heterotopia and the subversion of space. In this way, I have drawn a linguistic map of the space of gay culture.
Some Features of Evaluation and Development of Vilnius University Journalism Study Programmes (2018–2021)
Authors: Vaišnys Andrius
Published: July 2023

The author discusses the changes in the Journalism study program that were made in response to the order of the Lithuanian Minister of Education and Science (2018). With this order, the minister suspended 200 study programs in 2018, including the journalism bachelor‘s study program.

At Vilnius University, in response to the minister‘s decision, the program began to be changed, but the Lithuanian Constitutional Court recognized the minister‘s order as unconstitutional a little later. The evaluation of journalism studies is here: https://skvc.lt/uploads/ valuations/docs/1569806_VU%20Journalism_2021.pdf
Predictors of Urethral Stricture After Transurethral Resection of the Prostate Procedure
Authors: Saputra Daniel , Agil Ahmad , MUSTAFA AKHMAD
Published: July 2023

Transurethral resection of the prostate (TURP) is the most frequently used urology surgical method to manage benign prostate hyperplasia (BPH). Despite the relatively efficacious treatment, urethral stricture (US) may form after TURP. The prevalence of the urethral strictures (US) following TURP ranges from 2.2% to 9.8%. The study aimed to identify the predictors of urethral strictures in patients receiving TURP. This study was a retrospective cohort study on patients underwent TURP in Dr. Hasan Sadikin General Hospital Bandung, Indonesia, between 2015 and 2019. Data were obtained from medical records and urology registry of a minimum 12-month follow-up period. Data on patient demographics, estimated volume of the prostate, total resected prostate, and operating time were extracted. Multiple logistic regression was utilized to determine the odds ratio difference between groups. A total of 451 TURP cases were performed between 2015 and 2019, with 22 (4.87%) cases of post TURP US identified. The mean estimated prostate weight was 45.6 g and resected prostate weight was 20.4 g, with a 0.37 gr/min resection rate. Prostate weight, operating time, and duration of catheterization after surgery were not significantly different statistically. Slower resection rate and smaller resected volume are the statistically significant predictors of increased occurrence of urethral stricture (p<0.05). Lower resection rate is also a predictor for urethral stricture after TURP procedure.
Effective Visual Media to Increase Knowledge and Comprehension of Multidrug Resistant Tuberculosis Among Patients and Their Caregivers
Authors: Chaidir Lidya , Pascapurnama Dyshelly Nurkartika , Selviyanti Claudia , Natasha Cindy , Jihadah Muti'ah Nurul , Santoso Prayudi
Published: July 2023

Indonesia ranks thirdamong countries with the largest number of TB cases after India and China. Globally, more than 3-4% of all TB cases are Multidrug-Resistant Tuberculosis (MDR TB). MDR TB is a more complicated TB that needs extra treatments, which extend treatment time and increase adverse effects. Thus, MDR TB patients and their families often feel demotivated about completing treatment, leading to loss to follow up, which contributes to the never-ending transmission and greatly affects the success rate of the national TB control program. Thus, better knowledge and perception on MDR treatment for patients and families plays a crucial role in dealing with this issue. A cross-sectional study was performed from April to June 2019 to evaluate the effectiveness of visual educational media for TB patients and their caregivers. Participants consisted of 144 patients diagnosed with MDR TB and their caregivers or family members (n=22). A pre-test was administered before an education session by a nurse and visual media were used as the educational material. At the end of the session, a post-test was performed. The post-test score was then compared to the pre-test score to evaluate the session’s effectiveness using the paired t-test. Result showed significant increase in the post-test score (t= 3.249, df=3, p=0.04), with the caregivers attained a higher score, showing better improvement in knowledge after the session compared to the patient group. Hence, the MDR TB educational intervention using visual media is considered effective to increase participants ‘understanding of MDR TB. It is expected that with increased knowledge on MDR TB, the treatment success rate will increase and becomes the catalyst for the nationwide TB control strategy.
A Multicentric study of sleep patterns and electronic media usage in adolescents
Authors: Y Bhave Dr. Swati , Neglur Madhureema , Baheti Pooja , Mane Dr. Shailaja , Yadav Dr. Sangeeta , Joshi Dr. Surekha
Published: July 2023

Introduction: Adequate healthy sleep is essential for adolescents’ optimal cognitive, and emotional functions and physical health. With media overload and stimuli from electronic gadgets, multitasking and academic stress, students are sleeping for fewer hours, making them one of society's most sleep-deprived age groups. Association of Adolescent and Child Care in India (AACCI) conducts multicentric studies to survey the lifestyles of children and adolescents in India, which include the use of electronic media and sleep patterns. These results are shared with the management, teachers and parents and programs are held for them and the students to make them aware of the importance of improving sleep patterns and proper sleep hygiene and the risks of poor sleep habits. Methods: This paper shows the results of a multicentric college study. This data was collected from participants of AACCI Life Skills Education (LSE) workshops conducted in six different colleges in India during the period 2008 and 2010. A standardized and validated Questionnaire on Life style has been created by AACCI for use in these multicentric surveys The sample comprised 289 college students from six groups – A) and B) 62 First year Junior college from Mumbai (age range 16-18 years; 32 students of high socioeconomic status from an elite college and 30 students from middle socio-economic status), C) 113 First-year medical students from Pune (age range 18-19 years), D) 32 students from Vocational college from Mumbai (age range 19-21 years), E) 40 Final year nursing college From Delhi (age range 19-24) and F) 42 M.Tech Post Graduate (PG) Engineering Hyderabad (age range 20-25 years). Ethical clearance: Ethics approval was obtained from AACCI Institutional ethics committee. Permission and consents: Prior permissions were taken from the college Principals to conduct the workshop, including parental permission for the participants below 18 years of age. Written assent (16-17 years) consent (>18 years) was obtained from the students by including it in the questionnaire form. Statistical analysis: The data has not been analysed statistically, as the sample size at each centre was small and their backgrounds were different. Descriptive comparisons have been made across students’ sleep patterns and electronic usage. Results: Results indicated that students from the younger age group slept longer than those from the older group. Nursing and medical students had less sleep hours due to erratic schedules. PG engineering students had the most regular sleep hours. Regarding electronic devices, PG Engineering students used the computer and internet for >6 hours daily; nurses used the computer internet and mobile the least. Mumbai students watched Television the most while engineering students watched it the least. AACCI conducted workshops for these students to inculcate in them, a healthy lifestyle.
Beauty standards: beauty patterns
Authors: Maria Rodrigues Batista Esther
Published: July 2023

The purpose of the work presented here is to carry out a study on the beauty standards of modern society, by conducting a case study. Initially, the research is based on the definition of what beauty would be and how it has been perpetuated throughout the history of civilization, with a special focus on how changes in the social context. Case. Initially, the research is based on the definition of what beauty would be as perpetuated throughout the history of civilization, with a special focus on how the premises.
Natural threat to the Turkish straits sea area: the mucilage
Authors: Usluer Hasan Bora
Published: July 2023

The Turkish Straits Sea Area comprises the Istanbul, the Canakkale Straits, and the Marmara Sea. The area is the most essential natural waterway connecting the continents of Asia and Europe. However, as of May 2021, it is polluted with Mucilage which is a slippery mass of microorganisms mostly clustered together, covering large areas, mainly in the Sea of Marmara and locally in the Turkish Straits. Unicellular organisms release fatty acids from the body under stressful environmental conditions. The Turkish Straits Sea area, which also connects the Black Sea and the Aegean Sea, constitutes a critical marine habitat among marine species. On the one hand, ballast operations create a sticky surface on the ship's hull and the underwater structure in contact with water. At the same time, there is also the necessity of cooling the ship's machinery with seawater. Ship cooling systems use seawater to cool the ship's engine block, while filtration prevents damage to the system. However, the mucilage effect affects the control of the vessel by causing clogging of the filters that serve to protect the system. The fact that the water taken by filtration is affected by Mucilage, clogging, and involving the outer surface of the ship affects the safety of the vessel at a high level. This research article tries to explain the damage and effects of Mucilage on ships sailing in the Turkish Straits.
Adaptation of orange (Citrus sinensis L. Osbeck) to climatic conditions in Cusco as a response to climate change
Authors: Gil-Mora Juan E
Published: July 2023

The Cusco Region, due to its geographical and climatic peculiarities, is prone to extreme climatic events, such as the increase in average temperature, intense rainfall, agronomic and meteorological droughts. Citrus fruits, like oranges, adapt to different climates; however, its growth, flowering phenology and fruit set are affected by changes in temperatures and lack of rain; therefore, these abiotic factors are detrimental to citrus production in usual scenarios and in tropical climates. The objective of the research was to develop an experiment to propose a mechanism of adaptation to climate change of the orange (Citrus sinensis L. Osbeck) in climatic conditions and altitude of Cusco, located at 3,302 m.a.s.l. evaluating the phenology and the characteristics of the fruit and production. The experiment constitutes a quantitative investigation, of a descriptive and correlational type, using non-probabilistic sampling called consecutive sampling. Management consisted of pruning, removing thorns and applying soil conditioner; the evaluation of the phenology consisted of the observation of the phases of sprouting, flowering, relative rest, fruiting and harvest period; for the conditions in Cusco, the phenological parameters presented two sprouting flows, first between January-May and second, between August-September; two flowering flows, the first between April-June and the second between September-November; the average production was: 229 fruits/tree/year; fruit diameter of 06,44 cm and a production of 26,44 kg/tree/year. The production of oranges at high altitudes shows an adaptation to climate change, constituting an action of economic interest, contributing to the Peruvian proposal, which is committed to the global response to climate change and considers it a priority to update its national contributions to incorporate the objectives adaptation to climate change.
Hysterectomy for gynecological indication at the General Hospital of Kasenga, in the city of Uviran, in the Province of South-Kivu in the Est of the Democratic Republic of Congo
Authors: Akili Christian Manegabe , Busingisi Chance
Published: July 2023

We conducted a retrospective and cross-sectional study. We collected the data over a period of one year. It took place over a period of time from January 25, 2021 to January 25, 2022 in the obstetrics gynecology departments of the General Hospital (GH) of KASENGA in the city of Uvira in the province of South Kivu in the East of the Democratic Republic of Congo (DRC). The main objective is to determine the frequency of hysterectomy in this part of DRC and to determine what would be the gynecological indications. Only patients who underwent hysterectomy for gynecological indication were included in our study. We found that the frequency of hysterectomies for gynecological indications compared to all surgical activity was 12.5%. The average age of our patients was 54.2 years. The indications were dominated by hysteroceles (44%) and uterine myomas (20%). The approach was vaginal in 52% and abdominal in 48%. The hysterectomies were total in 92% of cases and radical in 8% of cases. We did not note any major complications except parietal infections which were in 16% of cases. All patients received postoperative antibiotic prophylaxis. No anticoagulant treatment was prescribed. After this work we found that hysterectomy is frequent at the Reference Hospital (HR) of KASENGA with the main indication, hysterocele according to the different degrees. We did not have many complications and this would be due to the early antibiotic prophylaxis. The improvement of socio-economic conditions, awareness and early detection should improve the conditions of care.
Metodologias ativas como estratégia para desenvolver competências e habilidades em acadêmicos de Nutrição em tempos de Pandemia
Authors: Paixão Mírian Patrícia Castro Pereira , Amichi Kelly Ribeiro
Published: July 2023

O Curso de Graduação em Nutrição deve ser centrado no aluno como sujeito da aprendizagem e apoiado no professor como facilitador e mediador do processo ensino aprendizagem. Dessa forma, é importante repensar a maneira como as atividades de ensino têm sido desenvolvidas para que os acadêmicos se preparem para o mercado de trabalho conforme as demandadas atuais. Este trabalho propõe descrever estratégias ativas de ensino, como a aprendizagem baseada em problemas e projetos que podem ser aplicáveis aos acadêmicos do curso de Nutrição, visando a tornar, estudante e professor, agentes comuns e colaborativos na busca e na construção do conhecimento a partir de experiências reais, mesmo diante do distanciamento social orientado pela Organização Mundial da Saúde devido a pandemia relacionada a COVID-19.
Trauma Processing and “Prolonged Social Traumas” in the World of a Synagogue
Authors: Tóth Katalin Balogné
Published: July 2023

The first question addressed in this study is how to resume everyday life in a synagogue community following the cataclysm of the Shoah and how different aspects of this relaunch can be interpreted as an attempt to process the trauma of the Holocaust, either on an individual or group level. The second part of the paper revolves around the symptoms of “prolonged social trauma” in the dynamics of the changed community during the 1970s and 1980s and those of religious life in the field under study. In this case, the area in question represents a narrow locality, the Páva Street Synagogue and its community in Budapest between 1945 and 1989. Changes in the life of the community are brought to the fore via interviews using the oral history method along with press and archive sources. The Páva Street Synagogue in Ferencváros is one of the “periphery synagogues” of Budapest, where religious life with different intensities can be considered almost continuous. The synagogue, built with public funding and inaugurated in 1924, was used as an internment camp in the second half of 1944. Following the liberation of the ghettos and camps, community life began again a few months after the persecution. Between 1945 and 1956, this resumption involved a series of steps, including the physical rehabilitation of the synagogue environment and the organization of its daily routines. The events of 1956 created further difficulties for the community: the building was damaged once again and the community disintegrated. Although everyday life resumed, the symptoms of trauma manifested in the 1970s and 1980s as the community dwindled and its members grew older, leaving generations missing from the synagogue.
Assessment of the impact of the Tomaszów Lubelski bypass on the spatial structure of rural areas
Authors: Piwko Monika , Leń Przemysław
Published: July 2023

In recent years, the road network in Poland has undergone significant development, meeting the objective of creating a coherent network of roads to ensure the efficient functioning of passenger and freight transport. Linear investments, such as the construction of motorways, expressways or bypasses, are an important element that improves the safety and comfort of the life of residents, and has a significant impact on the economic and regional progress. In addition to the undoubted benefits of constructing a bypass, its possible negative impact on the surrounding agricultural and forest areas should be emphasised. Poor planning and construction of the bypass itself, without prior programming of survey and management works, can lead to disturbances in the spatial structure of neighbouring villages.
This study attempts to analyse and evaluate the impact of the construction of the Tomaszów Lubelski bypass on the spatial structure of rural areas located in the eastern part of Tomaszów County (Lubelskie Voivodeship), which is a 9.58 km long section of the S17 Warsaw – Hrebenne expressway. The study undertook a detailed analysis of only those factors that adversely affect the spatial structure of rural areas. On the basis of research on the subject, factors affecting and significantly changing the spatial structure of rural areas were identified, which allowed to formulate final conclusions regarding the problem of realising linear investments in relation to shaping the space of rural areas.
A research of the effect of an underwater electric explosion on the selectivity of destruction of quartz raw materials
Authors: Bulkairova Gulden , Nussupbekov Bekbolat , Bolatbekova Madina , Khassenov Ayanbergen , Nussupbekov Ulan , Karabekova Dana
Published: July 2023

The work is devoted to the study of the effect of an electric explosion on the selectivity of the destruction of quartz raw materials. The object of the study is quartz ore of the Nadyrbay deposit of the Republic of Kazakhstan. An electrohydroimpulse plant for crushing and grinding quartz raw materials has been developed and assembled. Using the electrohydroimpulse method, the granulometric composition of quartz can be adjusted. This makes it possible to adjust the magnitude of the voltage in the discharge channel and time. In this technology, quartz ore processing was carried out with an increase in the discharge voltage of the storage from 14 kV to 25 kV, the length of the interelectrode distance from 8 to 12, the capacitance of the capacitor 0.5 µF, 0.75 µF and the processing time of 5 min. Using the electrohydroimpulse method, quartz ore particles with an initial fraction of 5 mm, 10 mm and 1 mm were crushed to 0.8. The results of the grinding of quartz raw materials with the influence of an underwater electric explosion in a liquid medium allowed us to determine the degree of grinding of the material.
The obtained results can be used in the course of studying the characteristics of crushing and grinding of ores. In the food industry, quartz sand within 0.25–0.5 millimeters can be used as a filler to create filters for water purification, as well as products from oil, industrial effluents, etc. Particles ranging in size from 0.5 to 1 millimeter can be used for rough processing of metal, stone and glass.
The structural and quantitative analysis of powdered quartzite samples was made using a scanning electron microscope and the stoichiometry of the elements was calculated
Oscillation frequencies of the reinforced wall of a steel vertical cylindrical tank for petroleum products depending on winding pre-tension
Authors: Tursunkululy Timur , Zhangabay Nurlan , Avramov Konstantin , Chernobryvko Maryna , Kambarov Medetbek , Abildabekov Arman , Narikov Kanat , Azatkulov Otabek
Published: July 2023

This paper reports a study of the frequencies and vibration modes of a vertical steel tank with a variable wall thickness in the ANSYS software suite using a finite-element model of vibrations of a tank with a volume of 3000 m3 for oil and petroleum products, hardened by a prestressed winding. The simulation was carried out for two variants of fixing the upper edge of the tank wall, which correspond to cases of absence or presence of tank coating. The estimation cases for the coefficients of the tension force of the wire relative to its tensile strength were investigated: at k1=0.2; k2=0.4; k3=0.6 and k4=0.8. Variation studies were carried out both taking into account the additional loads caused by the action of hydrostatic pressure from the maximum and half poured oil into the tank, and without oil. The magnitude of changes in the vibration frequencies of the tank wall without the influence of the coating varies within 12–27 % and when taking into account the influence of tank coating, 21–62 %, depending on the degree of filling of the tank. The revealed pattern relates to the fact that a decrease in the tension force of the filament in the winding leads to an increase in the frequency of oscillations. Thus, pre-stress can be applied to regulate the oscillation frequency of the tank wall. By decreasing which in the winding, it is possible to increase the natural frequencies of the wall and to lower the frequencies through an increase in the prestress. The research results can be used in the future as anti-seismic measures in the design and construction of steel vertical cylindrical tanks, as well as to improve the strength characteristics of existing cylindrical structures
Determining the elongation of T-type pressure fire hoses based on full-scale experiments
Authors: Stas Serhiy , Bychenko Artem , Kolesnikov Denis , Myhalenko Oleksii , Pustovit Mykhailo , Myhalenko Kostiantyn , Horenko Lesya
Published: July 2023

The phenomenon of changing the geometric parameters of pressure fire hoses is manifested when they transport extinguishing liquids. Although the extension of pressure fire hoses does not have a significant impact on the fire extinguishing process, the energy costs associated with such changes should be taken into account. In fact, part of the power of the fire pump is spent not on transporting liquids and forming extinguishing jets but on the «optional» lengthening of pressure fire hoses. Latex pressure fire hoses with diameters of 51 mm and 77 mm and fire pressure hoses with double-sided polymer coating of 51 mm (all of type T) were randomly selected for the experiments. The temperature was 263 K and 298 K, the fluid flow rate was constant, the pressure values at the inlet of the Protek 366 fire barrel had fixed values. No significant changes in the diameters (expansion or narrowing) of pressure fire hoses were recorded during water transportation. An elongation of 79 cm with a hose length of 1960 cm (73 cm with a hose length of 1790 cm) was recorded when transporting water in the case of using hoses with a diameter of 77 mm, a pressure at their inlet of 0.8 MPa, a temperature of 263 K, and a water flow rate of 0 l/s. The force that provided such a stretch was 2.04 kN. When extinguishing liquid was supplied by pressure fire hoses with a diameter of 77 mm in the temperature range of 263–298 K, the elongation decreased slightly with decreasing temperature. A slight unevenness of stretching of pressure fire hoses along the length was found when stretching increased closer to their middle. The results indicate the dependence of the amount of stretching on the materials from which pressure fire hoses are made, as well as their diameter. The values of dynamic forces that cause stretching of pressure fire hoses established in the study can be used in practice when taking into account the forced energy losses for fluid transportation
Development of a hybrid neural network model for mine detection by using ultrawideband radar data
Authors: Lytvyn Vasyl , Peleshchak Ivan , Peleshchak Roman , Mediakov Oleksandr , Pukach Petro
Published: July 2023

The object of the study is the architecture of a hybrid neural network for mine recognition using ultra-wideband radar data. The work solves the problem of filtering reflected signals with interference and recognizing mines detected by ultra-wideband (UWB) radar. A hybrid neural network model in combination with the Adam learning algorithm is proposed. Filtering of reflected signals from mines is carried out using an MLP (multilayer perceptron) filter, which selects low-amplitude parts of signals that carry information about a hidden mine from the entire reflected signal. Mine recognition is carried out by a Hilbert block and an oscillatory neural network, which are included in the structure of a hybrid neural network. The peculiarity of the obtained results, which allowed to solve the investigated problem, is the transformation of the signal frequency by the Hilbert block and the recognition of mines by the oscillatory neural network in the resonant mode. The three-layer MLP filter effectively filters out the unwanted component in the total signal reflected from the subsurface object, as the MSE (Mean Squared Error) of the MLP filter is 1·10-5. If the frequency of the Hilbert signal is equal to the natural frequency of oscillations of neurons  then the recognition of signals with a small amplitude from subsurface objects is carried out by an oscillatory neural network based on the resonant amplitude, which is indicated by a small value of cross-entropy. The proposed model of a hybrid neural network provides amplification of useful signals due to resonance and has higher performance compared to existing models of artificial neural networks. The practical significance of the obtained results lies in their application in the field of automated neural network technologies for detection and recognition of subsurface objects of various nature based on reflected radar signals with an amplitude at the noise level
Designing engobe coatings for ceramic bricks
Authors: Khomenko Olena , Tsyhanenko Liudmyla , Tsyhanenko Hennadii , Borodai Artem , Borodai Dmytro , Borodai Serhii
Published: July 2023

This paper reports research into the development of compositions of engobe coatings for ceramic bricks and investigating the influence of technological production factors on their physical and mechanical properties. The results of this work make it possible to solve the task of expanding the range and improving the operational properties of building ceramics.
The data obtained have made it possible to establish physicochemical processes occurring during the formation of the phase composition and structure of engobe coatings. This has revealed the possibilities for designing engobe for various types of ceramic bricks, which differ in technological parameters of production and operational properties.
The charge compositions were designed in a three-component system "refractory clay – quartz sand – cullet", taking into account the possibility of their practical implementation in large-tonnage production. It has been established that the most important condition for obtaining high-quality products is the correlation of shrinkage and temperature coefficients of linear expansion of the ceramic shard and engobe coating. To prevent various defects, these indicators should vary by no more than 10 %.
The crystal-phase composition of engobe is represented by b-quartz and a small amount of devitrite, which are evenly distributed in a vitreous dense layer of coating on the surface of the ceramic shard.
Distinctive features of the results relate to the fact that a solution to the problem of designing engobe coatings for ceramic bricks has been proposed and the physicochemical bases of production have been highlighted. This paper also suggests ways to achieve coordination of finely dispersed coatings with coarse-grained ceramic masses by shrinkage and thermal processes.
The results reported here could be applied in typical production of face, clinker, and in some cases – ordinary brick or ceramic stone with firing temperatures of 950–1150 °C
Unbalanced credit fraud modeling based on bagging and bayesian optimization
Authors: Kashmoola Mohammed Alaaalden , Aziz Samah Fakhri , Qays Hasan Mudhafar , Alsaleem Naors Y. Anad
Published: July 2023

Credit fraud modeling is a crucial area of research that is highly relevant to the credit loan industry. Effective risk management is a key factor in providing quality credit services and directly impacts the profitability and bad debt ratio of leading organizations in this sector. However, when the distribution of credit fraud data is highly unbalanced, it can lead to noise errors caused by information distortion, periodic statistical errors, and model biases during training. This can cause unfair results for the minority class (target class) and increase the risk of overfitting. While traditional data balancing methods can reduce bias in models towards the majority class in relatively unbalanced data, they may not be effective in highly unbalanced scenarios. To address this challenge, this paper proposes using Bagging algorithms such as Random Forest and Bagging to model highly unbalanced credit fraud data. Bayesian optimization is utilized to find hyperparameters and determine the accuracy of the minority class as an optimization function for the model, which is tested with real European credit card fraud data. The results of the proposed packing algorithms are compared with traditional data balancing methods such as Balanced Bagging and Balanced Random Forest. The study found that traditional data balancing methods may not be compatible with excessively unbalanced data, whereas Bagging algorithms show promise as a solution for modeling such data. The proposed method for finding hyperparameters effectively deals with highly unbalanced data. It achieved precision, recall, and F1-score for the minority category of 0.94, 0.81, and 0.87, respectively. The study emphasizes the importance of addressing the challenges associated with unbalanced credit fraud data to improve the accuracy and fairness of credit fraud models
The role of addition of calcium alginate microcapsules on permanent deformation of AC–WC natural asphalt Buton stone in Indonesia
Authors: Desvita Melly Dwi , Djakfar Ludfi , Wisnumurti Wisnumurti , Prasetia Muhammad Syarif , Febriansyah Muhammad Chaidar
Published: July 2023

This paper discusses natural asphalt deposits of Buton stone (asbuton) in Indonesia are very abundant, but the characteristics of asbuton are not yet suitable for road applications. So that the use of asbuton as a binder needs to be added with additives that can react independently to overcome the permanent deformation such as the addition of calcium alginate microcapsules to the asphalt mixture. The purpose of this study was to determine the effect of adding calcium alginate microcapsules to the permanent deformation of AC-WC with asbuton.
The current problem is that road pavements are not able to heal themselves when cracks start to occur, so additional materials are needed that can stimulate self-healing to occur so that the cracks that have started to occur can be closed again even though it takes time so that the self-healing process can occur.
The microcapsules are made with the main ingredients of water, sunflower oil, sodium alginate (C6H7O6Na) and calcium chloride solvent (CaCl2), which are encapsulated and embedded in the asphalt mixture as a material that can restore the structural function by a healing method self healing. The research method uses true experimentally. Specimen variations in the study were the addition of calcium alginate microcapsules of 0 %, 1 %, 1.5 %, 2 %. Wheel Tracking Testing was carried out with the AASHTO Standard: T 32-11 and CAL Testing with the Tex-245-F 2014 standard. The results showed that with the addition of calcium alginate microcapsules, there was no significant contribution; better than microcapsules, the mixture decreases in the number of passes so that the mixture is easy to change shape rutting. However, adding calcium alginate microcapsules can reduce the value of weight loss, causing the adhesion of the asphalt mixture to increase
Devising a calculation method for determining the impact of design features of solar panels on performance
Authors: Hilorme Tetiana , Nakashydze Liliya , Tonkoshkur Alexander , Kolbunov Vadim , Gomilko Igor , Mazurik Stanislav , Ponomarov Oleksandr
Published: July 2023

An actual scientific and practical task related to the sustainable development of the country’s energy sector is to forecast parameters and predict the conditions of operation of solar cells and solar batteries in regular and non-regular situations. It is emphasized that this makes it possible to provide solar energy with high efficiency indicators, in particular, the indicator of profitability on invested capital in the construction of solar panels.
The main specific research method is regression analysis – to build a forecast model of the total amount of generated energy of solar panels in ground installations under variable conditions of operation.
An analysis of the distribution of the output data of the model by the number of solar battery modules was carried out using the example of terrestrial solar installations. To obtain empirical data, 31 objects in the Dnipropetrovsk and Zaporizhia oblasts, which have functioning solar batteries with different numbers of modules, were selected. This makes it possible to calculate the weighted average amount of generated energy during operation under variable conditions. 10 intervals of frequency values were separated with the largest range of values within the interval of 10,000–20,000 pieces of solar modules.
A model of the dependence of the total amount of generated energy on the number of solar battery modules and the weighted average amount of generated energy was built based on regression analysis. It was determined that the influencing factor of the model «number of solar modules» has a positive influence on the resulting factor (productivity of solar panels), while the influencing factor «weighted average amount of generated energy» has a negative influence. However, the «number of solar modules» influence factor is more significant. The obtained results give grounds for asserting the possibility of their implementation in the energy sector
Development of the solution search method using the population algorithm of global search optimization
Authors: Yakymiak Stepan , Vdovytskyi Yevhenii , Artabaiev Yurii , Degtyareva Larisa , Vakulenko Yuliia , Nevhad Serhii , Andronov Vitalii , Lazuta Roman , Shapoval Petro , Artamonov Yevhen
Published: July 2023

The research objects are decision making support systems. subject research is a decision making process in management tasks using bio-inspired algorithms. A method of finding solutions using the population algorithm of global search optimization is proposed. Joint use of invasive weed algorithm is proposed, genetic algorithm and evolving artificial neural networks are improved. The method has the following sequence of actions:
‒ an input of initial data;
‒ processing of initial data taking into account the degree of uncertainty;
‒ formation of the optimization vector;
‒ creation of descendant vectors;
‒ ordering of vectors in descending order;
‒ reducing the dimensionality of the feature space;
‒ teaching knowledge bases.
The peculiarity of the proposed method lies in the placement of agents-weeds, taking into account the uncertainty of the initial data, improved procedures for reducing the space of signs about the analysis object state.
Training of synaptic weights of an artificial neural network, type and parameters of the membership function and the architecture of individual elements, and the architecture of an artificial neural network as a whole is carried out. The proposed method was simulated in the MathСad 14 software environment. The task to be solved during the simulation was to determine the route of the ships in the operational zones of the Black and Azov seas in the conditions of hybrid actions of the enemy. The use of the method makes it possible to increase the efficiency of data processing at the level of 21–27 % due to the use of additional improved procedures. The proposed method should be used to solve the problems of evaluating complex and dynamic processes in the interests of solving national security problems
Constructing a model of the influence of structural and technological inhomogeneities on electromagnetic energy losses in cables based on a twisted pair
Authors: Bezprozvannych Ganna , Pushkar Oleg
Published: July 2023

The objects of research reported here were cables based on twisted pairs of various designs. The issue of the emergence of additional losses of electromagnetic energy is related to structural and technological inhomogeneities at the technological stage of cable production. The influence of the working capacitance of the twisted pair on the energy losses in the cables has been substantiated. A methodology was proposed for the numerical calculation of the electric field under the condition of ellipticity of the structural elements of the twisted pair. That has made it possible to determine the distortion of the electric field and the effect of inhomogeneities on the working capacitance of a twisted pair of different designs.
Specifically, it was shown that for shielded structures with continuous polymer insulation, the distortion of the electric field and the growth of the working capacitance are observed to a greater extent. The need to find technological solutions to reduce the effect of screen ellipticity on cable capacitance has been emphasized. The effectiveness of capacitance regulation in the presence of inhomogeneities has been confirmed, by using foamed insulation to reduce the loss of electromagnetic energy in the cable.
The effect of reducing the working capacitance and increasing additional losses under the simultaneous influence of the ellipticity of the electrical insulation and the protective polymer shell has been established, which necessitates the technological process adjustment in the manufacture of twisted pair.
An applied aspect of using the results is the possibility of improving the typical technological process of manufacturing twisted pairs to reduce additional losses of electromagnetic energy at the final technological stage of cable production.
The adequacy of the numerical studies was confirmed by experimental dependences of the attenuation coefficient and additional energy losses of the unshielded cable in the frequency range up to 100 MHz
Improving the oscillating wind turbine model
Authors: Shtanko Oleksandr , Litvinova Maryna , Zorina Iryna , Karpova Svitlana , Avdiunin Roman
Published: July 2023

Disadvantages in the structure of the most common rotary wind generators limit their use. This motivates the development of alternative types of wind turbines, the most promising of which are oscillating wind generators.
The object of the study is the structure of an oscillating type wind generator, which provides self-oscillating movement of the blade-wing. The design of the wind generator uses a modified wing shape to provide maximum lift. For this purpose, added elements are the tip and flap, which affect the shape of the wing, its angle of attack, and regulate the direction of the lifting force. The principle of attaching the tip and flap to the wing using spiral springs has been developed. The structure also includes locking magnets that affect the movement of the wing during a turn. The mechanism that drives the self-oscillating mode of operation of the wind turbine was described. This mode occurs under the action of the inertial force of the movement of the wing, the force of elasticity, the repulsive force of the magnets, and the pressure force of the air flow.
A computer simulation of the wind generator was carried out using the Ansys CFX software package. The model of the flow around an absolutely rigid body at small values of the Reynolds number was applied. The resulting dynamics of the horizontal movement of the wing of the wind turbine make it possible to use it for energy generation already at a wind speed of 2 m/s. The low cost of the wing and the automatic regulation of its movement make it possible to install many wings to increase the power of the wind generator. Thus, the improved wind turbine is low-cost, harmless to birds, has self-regulation of wing movement and can use the low-speed component of the wind, which significantly expands the geography of its operation. It is possible to transfer the proposed technological solutions for the construction of hydroelectric generators