bluuebunny/crossref_metadata_2025 huggingface dataset:
The effectiveness of the use of ancillary equipment in speed and strength training of athletes
Authors: Huzar V. , Strykalenko Y. , Shalar O. , Andreeva R.
Published: October 2022

Physical training of athletes, along with improving the technique of competitive exercises, the ability to correctly calculate the strength of the distance and show a certain result, is one of the most important components of the training process. Insufficient level of physical fitness of athletes, namely speed and strength training, prevents the effective overcoming of both parts of the distance and it as a whole, which does not allow to effectively realize their potential in competitive activities. The article analyzes the effectiveness of the use of auxiliary equipment in speed and strength training of athletes aged 14-15 years in the amount of 20 people. All athletes had the same level of training at the beginning of the study and trained with one coach. Accordingly, the number of training sessions and the conditions for their conduct were the same for all subjects. The following ancillary equipment was used during the study: rubber band, various steps, weights of different weights. Changes in the speed and strength training of athletes were studied. To comprehensively assess the impact of the use of ancillary equipment, tests were selected to assess the level of development of speed and strength qualities of athletes of different muscle groups. The following exercises were used: long jump from a place, jump up from a place, run for 30 meters from a high start, throw of a stuffed ball with two hands from behind a head on distance standing. It is proved that the results of the test of throwing a stuffed ball with two hands from behind the head at a standing distance of 41% increased the most significantly. The performance of the 30m run improved by 17.5%. According to the jump test, the results improved by 13.9%. This is due to the fact that in addition to the use of ancillary equipment, athletes during the preparatory part of the lesson and at the end of the main part actively use general preparatory exercises with jumping up.The lowest growth rate of results was established by the results of the long jump test - 2.9%. The obtained results confirm the effectiveness of the use of auxiliary equipment in the training process of athletes. However, the development of new methodological approaches to the development of other leading motor skills of athletes remains unresolved, which emphasizes the prospects for further research.
The effectiveness of technology for the formation of effectiveness in shooting biathlon students
Authors: Maliar Eduard , Maliar Nelia , Ognystyy Andriy , Ognysta Kateryna
Published: October 2022

As a result of the experiment, significant changes in the indicators of shooting training of biathlon students of the experimental group were revealed, which proves the effectiveness of the technology of formation of effectiveness in shooting in the educational and training process of biathlon students. The increase in the effectiveness of the competition in the students of the experimental group to 31.4% was provided by the use of shooting exercises in training at rest lying down / standing, after passing a circle of 500 m and 50 shots for endurance at rest and after a circle of 300 m. Shooting training of biathlete students of the experimental group also included various exercises not only to improve shooting technique, but also to form psychological stability in the competition. Performing most of the proposed exercises, biathletes were in conditions that are similar to competitions. Analysis of scientific and methodological literature has shown that the problem of improving the performance of biathletes is devoted to many studies: developed a set of special shooting exercises to learn and improve the preparation of biathletes rifle for shooting lying down and standing [1, 2, 4]; the accuracy of shooting of qualified American biathletes and the stability of the rifle after loading of varying intensity was assessed [7]; determined the effectiveness of the impact of autogenic and ideomotor training on the stability of performance in shooting biathletes after strenuous exercise [6].

However, the system of integrated use of shooting and psychophysical training to improve the performance of biathletes is still insufficiently developed.
Prerequisites for the appearance and development of ski marathons visma ski classics
Authors: Chenikalo Oleksandr , Kazmiruk Andriy , Zinkiv Olha , Stefanyshyn Natalia
Published: October 2022

The presented article considers the historical aspects of the formation of skiing, features and prerequisites for the appearance of new disciplines in cross-country skiing on the example of Visma Ski Classics marathons.

The aim of the research. Identify the prerequisites and analyze the development of ski marathons Visma Ski Classics as a new discipline in cross-country skiing.

Achieving the goal was ensured by using a number of general scientific research methods. In particular, the analysis and synthesis of theoretical data was chosen because they allowed to describe a relatively wide range of issues in a more diverse way. We took into account the information of sources that were related to various aspects of the preconditions for the appearancence of ski marathons Visma Ski Classics.

Based on a detailed analysis of scientific and methodological sources and available information on the Internet, it was established that Visma Ski Classics marathon was based on the stages of the Tour de Ski multi-day skiing competition. The basis for which, in its turn, were multi-day cycling competitions, namely Tour de France. This is exactly the positive component in the development and promotion of this sport, because skiing is a conservative sport, as well as most winter sports. In the 100-year history of the International Ski Federation (FIS), few changes have taken place. The modern world requires active change and entertainment. Therefore, many commercial starts began to emerge. One of them is a series of ski marathons Visma Ski Classics.
THE INFLUENCE OF SHAPING CLASSES ON THE DEVELOPMENT OF PLASTICITY IN HIGHER EDUCATION
Authors: Boyko G. L.
Published: October 2022

The article analyzes the influence of shaping lessons on the development of plasticity in female students of higher education institutions. in the system of physical education of female students of higher education institutions. It is established that shaping has great potential for organizing a healthy lifestyle, engaging in culture, improving plasticity. The study revealed: 1) not specified specific varieties and manifestations of plasticity, which are the content of shaping; 2) no system of tests has been developed, quantitative and qualitative evaluation criteria for determining the level of development of plasticity during shaping have not been identified; 3) the technology of improving plasticity in accordance with its main varieties and manifestations has not been developed; 4) the relationship between the development of plasticity and a number of morphological, physiological and psychofunctional indicators has not been established.

Thus, the high theoretical and practical significance of the problem of development of motor coordination, in particular the plasticity of female students of higher education institutions in the process of shaping, structural approach to its study, multifaceted aspects of consideration determined the relevance of the chosen topic. This is due to the restructuring of all spheres of human socio-economic activity, which requires professionalism, the manifestation of moral-volitional and physical qualities, and a fundamentally new organization of labor. The modern approach to the analysis of the problem of formation of a stable need for active motor activity of an individual based on a conscious desire for self-improvement makes it possible to find socially significant directions for its solution.
Influence of folk games on junior schoolchildren’s anthropometry
Authors: Klish I.S. , Moroz M.S. , Konstankevych V.P. , Chizh A.G.
Published: October 2022

The question of the underinvestigated side of the influence of folk games on junior schoolchildren’s anthropometry has been raised. The way how exactly folk games put imprint on the developments of somatometric and physiometric parameters (body length, body weight, chest circumference) has been analysed. The goal of the research is to verify the effectiveness of Ukrainian folk junior schoolchildren. The research task is to finding out the influence of folk moving games on the physical development of junior schoolchildren. The research methods were determined by parameters of body weight, body length and chest circumference. Results of work. Changes in parameters of physical development of junior schoolchildren in control and experimental groups have been highlighted. The balance between body weight, body length and chest circumference has been authenticated. The annual increase of physical development of junior schoolchildren has been shown. Conclusion. Based on the above results, the effectiveness of the Ukrainian folk games’ influence on the physical development of junior schoolchildren has been stated.
The influence of sports tourism on the indicators of the cardiovascular system and coordination among students aged 16-18
Authors: Prudnikova Maryna , Zhijing Ban , Sidorova Tatyana , Bershov Sergii
Published: October 2022

The article deals with the processes of the work of the heart muscle and active muscles of the body of students aged 16-18 under the influence of cycling tourism. The purpose. To determine changes in the cardiovascular system and coordination of movements of 16-18 years old after the planned physical activity. Result. The data of 16-18 year old students on changes in diastolic blood pressure, heart rate, aerobic and anaerobic metabolic capacities, PWC170 test (p<0,05-0,001) are presented. Coordination capabilities in terms of walking on an 8-meter bench, the difference between running 15 m and slalom running 15 m, shuttle running, statistical balance with eyes closed, standing on the bike did not change (p>0,05). This suggests that there is a need in training to pay more attention to exercises for the development of coordination of movements.
Activation of educational and cognitive activities of future specialists of physical culture and sports to professional competent activity in the fitness industry
Authors: Putrov Sergiy , Omelchuk Olena , Putrov O. , Chernenko A.
Published: October 2022

The article considers the methods of activating the educational and cognitive activities of future specialists in physical culture and sports professionally competent activities in the fitness industry. It is noted that purposefully organized professional training of future specialists in physical culture and sports promotes the development of cognitive activity, independence, creative activity of productive thinking of applicants for higher education, in great demand in a developed industrial society. The purpose of the study was to substantiate the intensification of educational and cognitive activities of future specialists in physical culture and sports in professionally competent activities in the fitness industry. Material and methods: analysis and generalization of data from scientific and methodological literature, retrospective of own experience. Results of the research. Educational and cognitive activities of students are various types of collective and individual work in the classroom and outside the classroom. Educational activities include: creating projects, conducting trainings, business games, educational discussions, round tables, creating fitness programs and other activities. tasks of activation of educational and cognitive activity at the expense of introduction of innovative educational technologies: formation of cognitive enthusiasm, motivation to training; formation of skills to work with information presented in different types (text, drawing, diagram, symbolic record, model, table, diagram); formation of skills of independent cognitive activity; formation of skills of independent individual and collective work: mutual control and self-checking, discussion of information, planning of cognitive activity and self-assessment. Conclusions. Intensification of educational and cognitive activities of future specialists in physical culture and sports to professional activities in the fitness industry will be more effective through the introduction of innovative educational technologies such as trainings, business games, educational discussions, round tables, Case-Study, Workshop, professional consultations , creation of fitness programs and other activities.
Metrological approach to the assessment of the criteria of speed and strength training of middle school students in physical education lessons in athletics
Authors: Sinigovets Vasyl , Sinigovets Larysa , Diskovsky Victor
Published: October 2022

Evaluation of the results of pedagogical control is the main factor for obtaining information about the state of physical fitness and effectiveness of educational work in physical education lessons. Obtaining an objective assessment of the level of development of speed and strength qualities of middle school students helps to improve the management of the educational process, making adjustments in the planning of physical education and forecasting academic achievement. The main metrological requirements for the development of evaluation criteria for the manifestation of speed and strength training of students include: 1) the correct choice of control, tests and their compliance with statistical criteria of reliability, objectivity and informativeness; 2) compliance of methods and means of control with the objectives of the study; 3) the adequacy of methods of statistical processing of test results. The purpose of the study is aimed at developing assessment criteria for speed and strength training of middle school students in physical education classes in athletics. The research methodology is aimed at substantiating the results of pedagogical control, development of quantitative and qualitative criteria of speed and strength training of middle school students of general secondary schools. The scientific novelty is to develop quantitative and qualitative criteria for assessing the speed and strength of middle school students, to determine the impact of the process of physical education on the dynamics of their changes in the results of phased control. The use of metrological tools and methods for assessing the speed and strength of middle school students allows the implementation of individual and differential approach to each student in the process of physical education.
Recent Progress of Eco-friendly Lead-free Halide Perovskite Light-Emitting Diodes
Authors: Lee Se-Rin , Kim Do-Young , Jung Jae-Geun , Kim Hyeon-Woo , Lee Byeong-Hyeon , Park Min-Ho
Published: October 2022

Metal halide perovskites (MHPs) are promising candidate materials for next-generation optoelectronic device applications such as light-emitting diodes (LEDs), solar cells, and photodetectors. However, the toxicity and poor stability issues of lead-based MHPs (LHPs) are still challenging to fulfill a restriction of hazardous substances directive (RoHS) and industrial standards for the commercialization of LHP devices. Therefore, eco-friendly and lead-free halide perovskites (EHPs), which are superior to LHPs, should be developed. In this review, we will review the promising strategies to substitute a lead cation with non-toxic metal cations such as tin (Sn), bismuth (Bi), antimony (Sb), and copper (Cu), and discuss the synthetic methods, crystal structures, luminescent properties, and their LED applications.
Improved Weathering Resistance of Commercial Soda-Lime Glass via Compositional Modification
Authors: Lee Jinju , Lee Hansol , Chung Woon Jin
Published: October 2022

Soda-lime glass (SiO2-CaO-Na2O) has been widely used for various applications but suffered from weathering which is induced by the reaction between the atmospheric water and alkali or alkaline earth ions on the glass surface deteriorating the production value. In this study, composition of a commercial soda-lime glass was modified to improve its weathering resistance without significant change in its thermal properties for commercial production. Weathering resistance of the modified glasses were examined by exposing them to the condition of 85% relative humidity (RH) at 85℃ up to 20 days. Noticeable improvement of weathering resistance was observed when CaO and Na2O contents were replace by ZnO and K2O contents, respectively. Damaged glass surfaces due to weathering were observed with a field-emission scanning electron microscope(FE-SEM). Possible structural change of glass via compositional change was inspected by Raman spectroscopy. Thermal properties such as glass transition temperature and coefficient of thermal expansion were monitored and compared with those of the commercial reference glass.
Chemical Strengthening of Ultra-Thin Glass for Use as Cover Window of Flexible Displays
Authors: Lee Ji In , Ko Se Young , Choi Yong Gyu
Published: October 2022

The recent commercial success of foldable smartphones is indebted in part to integration of ultra-thin glass (UTG) into the flexible display modules. To endow glass with such a foldability, while keeping its merits over polymeric materials, tons of complicated issues need to be resolved in addition to thickness reduction. Since UTG is subjected to repeated deformations during its service as a flexible cover window, extra care is required to minimize microcracks during the whole preparation process. Here, it is noteworthy that chemical strengthening via ion exchange should be performed to UTG for better durability. In this article, after briefly reviewing the current status of UTG in terms of production and process, its chemical strengthening is highlighted as a viable option to further innovate its functionalities. A new ion-exchange technique which is not adopting the molten-salt-bath is proposed, and some experimental demonstrations exemplifying the concept of ‘actively stress-managed glass’ are delineated.
Introduction — Unruly Landscapes
Authors: Cisani Margherita , Lo Presti Laura , Pearce Lynne , Peterle Giada , Rabbiosi Chiara
Published: October 2022

In June 2020, the Centre for Mobilities Research (CeMoRe) at the University of Lancaster (UK) and the Centre for Advanced Studies in Mobility & Humanities (MoHu) at the University of Padua (Italy) co-hosted an international conference on the theme of “Unruly Landscapes.” As a result of the pandemic, the two-day event had to be moved online, but participants nevertheless enjoyed two days of inspiring discussion as the speakers engaged with the intersection of landscape and mobility from a variety of disciplines and approaches.

It was striking that this was a theme that attracted scholars from diverse scholarly and artistic communities, and we have attempted to reproduce the freshness of these dynamic, cross-disciplinary perspectives in the way we have grouped the articles here. Indeed, in order to maximize the diversity of the contributions. We sought approval from the Transfers editors to publish twelve shorter articles of 5,000 words each across two special sections. We trust that readers of the journal will enjoy our purposefully “unruly” juxtaposition of disciplines and approaches, including the different ways that our contributors have understood and conceptualized the mobile landscape. However, both here and in our Introduction to Unruly Landscapes No. 2, we have sought to make sense of what is going on in each article and to indicate how it contributes to the recent debates that most interest readers of this journal. We would also like to take this opportunity to thank Professor Tim Ingold for his keynote lecture at the conference which spoke about his recent work on landscape as “palimpsest”—as well as artist Jen Southern (Lancaster University) for allowing us to use her formulation of the “unruly” for our event.
A flow self-regulating superficial temporal artery–middle cerebral artery bypass based on side-to-side anastomosis for adult patients with moyamoya disease
Authors: Zhang Jianjian , Yu Jin , Xin Can , Fujimura Miki , Lau Tsz Yeung , Hu Miao , Tian Xiao , Luo Mingrui , Tao Tianshu , Li Ling , Wang Changyin , Wei Wei , Li Xiang , Chen Jincao
Published: October 2022

OBJECTIVE

Side-to-side (S-S) superficial temporal artery–middle cerebral artery (STA-MCA) bypass was reportedly used to treat a special moyamoya disease (MMD) patient with collaterals arising from the donor STA. However, the S-S technique is not routinely performed to date, and its benefits are still unknown for adult MMD. The purpose of this study was to investigate the possibility of routine use of the S-S technique for adult MMD.

METHODS

The authors retrospectively analyzed the clinical data of 50 adult patients (65 hemispheres, including 30 in the end-to-side [E-S] group and 35 in the S-S group) with MMD who underwent STA-MCA bypass. The patient demographic characteristics, clinical courses, technical details, intraoperative blood flow data, postoperative and preoperative relative cerebral blood flow (rCBF) values, modified Rankin Scale (mRS) scores, and short-term revascularization results were compared between the 2 groups.

RESULTS

There were no significant differences observed in terms of the baseline characteristics, bypass patency rates, postoperative/preoperative rCBF values, incidence of cerebral hyperperfusion syndrome (CHS), mRS scores, and short-term revascularization results between the 2 groups (all p > 0.05). Intraoperative blood flow analysis showed that the increase of STA flow in the E-S group was significantly higher than that of proximal STA flow in the S-S group (p = 0.008). Although the increases of proximal and distal recipient flow in the E-S group seemed greater than those in the S-S group, the results were not statistically significant (p = 0.086 for proximal flow and p = 0.076 for distal flow). CHS symptoms in the S-S group were milder and with much shorter duration. The follow-up angiographic data of the representative case demonstrated that both frontal and parietal STA branches and the occipital artery participated in postoperative collateralization.

CONCLUSIONS

S-S anastomosis can achieve comparable clinical effects to standard E-S construction. S-S anastomosis used in adult MMD demonstrated mild CHS symptoms with short duration and had the potential to arouse all scalp arteries as donor sources for revascularization through the intact distal STA branch via flow self-regulation.
PENGARUH GAYA HIDUP DAN ATRIBUT PRODUK TERHADAP KEPUTUSAN PEMBELIAN IPHONE
Authors: Talia Mutiara Agnes , Batu Reminta Lumban
Published: October 2022

ABSTRAKPenelitian ini bertujuan untuk mengetahui pengaruh  Gaya Hidup dan Atribut Produk terhadap Keputusan Pembelian Smartphone iPhone di Karawang. Populasi yang digunakan di penelitian ini adalah pengguna iPhone di Karawang. Dengan sampel sebanyak 96 responden. Pengumpulan data digunakan menggunakan teknik kuesioner. Berdasarkan hasil penelitian, hasil uji signifikansi pengaruh simultan dengan uji F, gaya hidup dan atribut produk secara bersama-sama atau simultan, berpengaruh signifikan (secara statistika) terhadap keputusan pembelian. Berdasarkan hasil uji pengaruh parsial dengan uji t, diketahui seluruh variabel bebas, yakni variabel gaya hidup terhadap keputusan pembelian dipengaruhi koefisien regresi 0.630 dan t hitung 4.733 > 1.98580 dengan nilai signifikansi 0.000 < 0.05. pengaruh gaya hidup terhadap keputusan pembelian dipengaruh koefisien regresi 0.656 dan t hitung 5.056 > 1.98580 dengan nilai signifikansi 0.00 < 0.05 jadi dapat disimpulkan bahwa atribut produk berpengaruh secara signifikan terhadap keputusan pembelian IPhone. Berdasarkan uji F gaya hidup dan atribut produk terhadap keputusan pembelian secara bersama-sama berpengaruh positif dan signifikan terhadap  keputusan pembelian smartphone merek iPhone pada pengguna iPhone di Karawang yang dapat dilihat dari nilai F sebesar 67.1412 > sebesar (3.09) nilai F hitung > F table atau 67.141 > 3.09 dengan tingkat signifikansi sebesar  0.000 < 0.05. Kata Kunci: Gaya Hidup, Atribut Produk, Keputusan Pembelian ABSTRACT This study aims to determine the effect of Lifestyle and Product Attributes on iPhone Smartphone Purchase Decisions in Karawang. The population used in this study were iPhone users in Karawang. With a sample of 96 respondents. Data collection was used using a questionnaire technique. Based on the results of the study, the results of the significance test of the simultaneous effect with the F test, lifestyle and product attributes together or simultaneously, have a significant (statistically) effect on purchasing decisions. Based on the results of the partial effect test with t test, it is known that all independent variables, namely lifestyle variables on purchasing decisions are influenced by regression coefficient 0.630 and t count 4.733 > 1.98580 with a significance value of 0.000 < 0.05. the influence of lifestyle on purchasing decisions is influenced by a regression coefficient of 0.656 and t count 5.056 > 1.98580 with a significance value of 0.00 < 0.05 so it can be concluded that product attributes have a significant effect on iPhone purchasing decisions. Based on the F test of lifestyle and product attributes on purchasing decisions, jointly a positive and significant effect on purchasing decisions for iPhone brand smartphones on iPhone users in Karawang which can be seen from the F value of 67.1412 > (3.09) F arithmetic value > F table or 67,141 > 3.09 with a significance level of 0.000 < 0.05.Keywords: Lifestyle, Product Attributes, Purchase Decisions
“Gradient-free” diffuse approximations of the Willmore functional and Willmore flow
Authors: Dabrock Nils , Knüttel Sascha , Röger Matthias
Published: October 2022

We introduce new diffuse approximations of the Willmore functional and the Willmore flow. They are based on a corresponding approximation of the perimeter that has been studied by Amstutz-van Goethem [ Interfaces Free Bound. 14 (2012)]. We identify the candidate for the Γ-convergence, prove the Γ-limsup statement and justify the convergence to the Willmore flow by an asymptotic expansion. Furthermore, we present numerical simulations that are based on the new approximation.
Low-dose CT noise reduction based on local total variation and improved wavelet residual CNN
Authors: Liu Yi , Kang Jiaqi , Li Zhiyuan , Zhang Quan , Gui Zhiguo
Published: October 2022

BACKGROUND: Low-dose computed tomography (LDCT) is an effective method for reducing radiation exposure. However, reducing radiation dose leads to considerable noise in the reconstructed image that can affect doctor’s judgment. OBJECTIVE: To solve this problem, this study proposes a local total variation and improved wavelet residual convolutional neural network (LTV-WRCNN) denoising model. METHODS: The model first introduces local total variation (LTV) to decompose the LDCT image into cartoon and texture image. Next, the texture image is filtered using the non-local mean (NLM). Then, the cartoon image is added to the filtered texture image to obtain the preprocessing image. Finally, the pre-processed image is fed into the improved wavelet residual neural network (WRCNN) to obtain an improved image. Additionally, we also introduce a compound loss in wavelet domain that combines mean squared error loss and directional regularization loss to separate the structural details from noise more thoroughly. RESULTS: Compared with state-of-the-art methods, the peak-signal-to-noise ratio (PSNR) value and the structure similarity (SSIM) value of the processed CT images using the new proposed model are 33.4229 dB and 0.9158. Study also shows that applying new model obtains better results visually and numerically, especially in terms of the preservation of structural details. CONCLUSIONS: The proposed new model is feasible and effective in improving the quality of LDCT images.
New approaches to hydraulic calculations of pipeline of water disposal networks based on simplified formulas
Authors: Tkachuk Oleksandr , Shevchuk Olha
Published: October 2022

Abstract. The expediency and critical conditions of conducting hydraulic calculations of drainage pipelines according to simplified power-law formulas have been determined. The main interrelationships between structural and kinematic parameters of drainage pipelines when performing their hydraulic calculations using simplified formulas are analyzed. Numerical values of coefficients and exponents in simplified formulas for pipelines made of different materials were obtained. It was established that for all types of urban drainage (domestic, rainwater and combined), the values of the minimum allowable slopes of the pipelines practically coincide, depend only on their diameters and can be calculated according to the obtained empirical formula with the recommended numerical values of its parameters for pipes of different materials. The maximum allowable of minimum and maximum slopes, as well as the corresponding maximum waste water consumption for pipelines of different diameters and materials, are determined.

New approaches to hydraulic calculations of water drainage networks involves their execution according to a single methodology based on the proposed simplified formulas. Also, it involves the use of the obtained empirical dependencies to determine the minimum and maximum permissible slopes and the corresponding maximum marginal flows of wastewater and pipe diameters. The algorithm for the unification of hydraulic calculations when solving the optimization problem is considered. The effectiveness of the application of simplified power-law formulas of hydraulic calculations and empirical dependencies obtained on their basis for unification is shown. Carrying out hydraulic calculations of drainage pipelines using simplified power-law formulas allows not only to simplify the calculations themselves, but also to obtain additional dependencies between the structural parameters of the pipelines based on them.
Impact of dredging on the environmental state of a small river with considering the composition of bottom sediments
Authors: Chushkina Iryna , Maksymova Nataliia , Semeniaka Iryna
Published: October 2022

Reports on the environmental impact assessment of planned activities aimed at restoring the hydrological regime and sanitation of rivers do not always pay attention to in-depth analysis of the physicochemical composition of bottom sediments. The silt deposits have proven to be a good ameliorant for agricultural lands, provided they are of satisfactory quality. Bottom sediments, especially their fine alluvial fraction, accumulate various compounds and trace elements, including heavy metals. Analysis of the content of iron Fe, manganese Mn, cobalt Co, chromium Cr and determination of the integrated level of contamination of bottom sediments did not reveal their toxic contamination in the area of the village Kleshnivka and the village Petrykivka. Determination of "geoaccumulation indices" by G.M. Mueller allowed to classify the sediments of the Chaplinka River as unpolluted, and the man-caused load on the hydroecosystem as low. In compliance with the recommendations on the content of Mn grades in the soil cover of the obtained fifth Igeoclass, which provides heavy pollution and significant man-caused load on the hydroecosystem. To characterize the processes occurring in the hydroecosystem of the Chaplynka River, the bottom accumulation coefficient was calculated. The assessment of the ecological status of hydroecosystems revealed an overwhelming ecological emergency. There is a significant threat of deposits of iron Fe, manganese Mn in bottom sediments. Despite the low risk of contamination of bottom sediments with chromium Cr, the risk will increase due to the rather variable chemical composition of surface waters, and hence the possibility of an ecological crisis for the hydroecosystem. The sanitary condition of a small river could be improved by restoring its hydrological regime. The decrease in the efficiency of dredging works is related to the regulation of the regulation of the riverbed. In the vast majority of cases, hydraulic structures are not provided for or do not correspond to the current level regime of watercourses. After clearing the river bed, there is a danger of their secondary silting, due to the abandonment of part of the temporary dumps on the banks within the water protection zones without fixing.
The symptomatic expression of infection with the Omicron variant in Chinese patients; findings from the Clificol COVID-19 clinical case registry
Authors: Tournier Alexander , Fok Yvonne , van Haselen Robbert , To Aaron
Published: October 2022

_Background_

Little systematic research has been conducted into the symptomatic expression of COVID-19 infections in patients. It is known that symptomatic expression varies between patients, but the nature and extent of this variability is poorly understood. This paper elaborates on the symptoms reported by Chinese patients infected with the Omicron variant, and compares this with available data from other countries.

_Methods_

Observational clinical case registry study of Chinese patients with confirmed Omicron variant COVID-19 infection. Symptoms were prospectively collected via a 171-item questionnaire and entered into the Clificol COVID-19 Clinical Case Registry. Two types of symptoms were distinguished: A) common clinical symptoms as identified by a search of available/published data, and B) homeopathic symptoms, used for the selection of the most suitable homeopathic medicine. Data were mainly analysed descriptively. Additionally, we compared the prevalence of the reported symptoms with available symptom data from the UK and France.

_Results_

Twenty one Chinese practitioners collected questionnaires on 388 cases that received a first homeopathic prescription between 5 December 2021 and 8 April 2022. With respect to A), the most frequently reported clinical symptoms were respectively cough (71%), fever (65%), extreme tiredness (58%), headache (51%), sore throat (46%), runny nose (34%), unusual muscle pains (31%), hoarseness (21%), eye soreness (8%) and brain fog (6%). With respect to B), homeopathic symptoms related to cough and fever were particularly prevalent.

_Conclusions_

This is the first study which systematically investigated the reported symptoms of Chinese COVID-19 patients infected with the Omicron variant. Whilst the overall clinical symptom expression was similar to those reported for other countries, cough and fever related symptoms appeared to be particularly prevalent.
Problems of Information Hygiene in the IT Sphere
Authors:   Central Ukrainian National Technical University, Marchenko Konstantyn , Oryshaka Oleh ,   Central Ukrainian National Technical University, Marchenko Anzhelyka ,   Central Ukrainian National Technical University
Published: October 2022

In social production there is a constant expansion of the range of professions related to information processing. In addition to the emergence of new professions, computer information processing is also being introduced into a number of traditional professions. Therefore, requests to ensure healthy working conditions in such workplaces have led to the emergence of such an area of life safety and health and safety as information hygiene. An urgent task is to study the rules and regulations when working with information in the field of information technology. Problems that arise when working with information include increased intensity of information flows, simultaneous inclusion of multiple information flows, heterogeneity of incoming tasks, or excessive monotony of information flow, ambiguous information, ignorance of the operator regarding information, short deadlines. In addition, the state of the user of information is significantly affected by the emotional color of information, increased density of destructive facts, calls for hostility and violence, negative predictions, covert manipulation and more. The mental burden on the employee who processes information and makes decisions based on it depends on the spread of responsibility and the degree of responsibility, the magnitude of possible losses in making mistakes or making decisions, especially when it comes to significant financial obligations, and even more risk to the state. for human health and life. Due to the expansion of the range of professions related to the interaction of workers with information flows, the introduction of information hygiene as a unit of labor protection is an urgent task. Due to the specifics of working with information as a means and product of labor, it is necessary to study the working conditions of workers in typical IT jobs and the impact of information flows on the well-being and health of people performing different types of work. It is necessary to develop a set of rules and recommendations of information hygiene in the interaction of employees with information. An important task is to determine the types of work associated with intensive information flows and to conduct experimental research to determine the maximum allowable workload of workers in the performance of these works.
Optimization of the Thermal Regime in Confectionery Electric Ovens for Food Production
Authors:   Central Ukrainian National Technical University, Orlovich Anatoliy
Published: October 2022

The article is devoted to the study of the thermal regime in tunnel kilns in the food industry. It is noted that the existing methods are inefficient and do not take into account the influence of all components of the heat flow in the process of heat transfer to the workpiece. It is noted in the article that none of the existing methods fully stabilizes the total heat flux received by the baked workpiece during the passage of the baking zone. The baking process is one of the stages of food production, which determines the quality and cost of the product, the working conditions of staff, the ability to create current mechanized and automated products. The proposed method of regulating the thermal regime is based on the stabilization of all heat fluxes supplied to the workpiece. The author of the article proposes a method of compensating for temperature fluctuations inside the baking chamber based on physical heat transfer processes and allows to stabilize the amount of heat on the baked workpiece. In this case, the increase in the temperature of the workpiece during the passage of the baking zone will be constant, as a consequence - the heating of the workpiece will be stable. This will reduce product shortages due to baking defects.
A Method of Correcting the Output Signal of a Scanning Probe Microscope for the Study of Nanoobjects
Authors:   National Aviation University, Kvasnikov Volodymyr , Kataeva Mariia ,   National Aviation University
Published: October 2022

Recent advances in nanotechnology include the use of measuring devices that can study physical properties at the atomic and molecular levels and store high-density measurement information. It is proved that the most promising measuring instruments in the nanometer range are measuring devices based on scanning probe microscopes (SPM). Based on the analysis of studies, one of the main problems in working with nanoobjects and nanostructures is associated with ultra-low signal levels and the influence of external destabilizing factors. In this regard, the problem of improving existing and developing new methods of processing the measurement signal of SPM with increased accuracy and speed. The article considers the methods of increasing the accuracy of the output signal of the SPM considering the influence of destabilizing factors. A method of differentiation of combined signals has been developed, which involves the conversion of peaks of a multicomponent signal to reduce noise and minimize the impact of other sources of error from destabilizing factors. The advantage of the developed method is the possibility of its automation and efficient implementation for any measuring devices with a microprobe. Based on the proposed method, an algorithm for separating the combined signals was developed and a method for calculating the resolution of the SPM signal was proposed. An error correction method is proposed that is suitable for digital automated signal processing and helps to increase the accuracy and precision of measurements using SPM. Thus, the developed method of differentiation of combined signals allows to effectively adjust the hardware function of SPM to increase the reliability of recognition of combined peaks of signals while determining their intensities.
Development of a Database Management System of Recommendation Systems for Computer Networks and Computer-integrated Systems
Authors:   Central Ukrainian National Technical University, Mikhav Volodymyr , Meleshko Yelyzaveta ,   Central Ukrainian National Technical University, Yakymenko Mykola ,   Central Ukrainian National Technical University
Published: October 2022

The goal of this work is to develop a database management system of the recommendation system for computer networks and computer-integrated systems, as well as to compare the quality of its work with existing systems. Today, recommendation systems are widely used in computer networks, in particular, in social networks, Internet commerce systems, media content distribution, advertising, etc., as well as in computer-integrated systems, in particular, in the Internet of Things and smart houses. An effective way to present the data required for the recommendation system can reduce the number of resources required and facilitate the development and use of more sophisticated algorithms for compiling lists of recommendations. When storing data from the recommendation system, one of the important parameters of the database is the speed of reading/writing information, as well as the amount of memory required to store data in one format or another. Therefore, it is advisable to use simple data models. This paper investigated the feasibility and effectiveness of using open linear lists to store recommendation system data in computer networks and computer-integrated systems. To test the effectiveness of the proposed method of presenting data in the recommendation system, comparative experiments were conducted with such software as: relational database management system Postgresql, resident repository key-value pairs Redis and graph database Neo4j. Each method of presenting data was tested on the following indicators: time of filling the repository with test data; the amount of memory occupied by the repository after filling; recommendation generation time. The MovieLens data set was used as test data. The developed database management system based on linear lists is significantly ahead of the existing tools in terms of both speed and efficiency of memory use.
Probabilistic Analysis of Thermal Reliability of Brick Wall Units of Residential Buildings
Authors:   Central Ukrainian National Technical University, Pashynskyi Victor , Pashynskyi Mykola ,   Central Ukrainian National Technical University, Dzhyrma Stanislav ,   Central Ukrainian National Technical University
Published: October 2022

When the temperature of the inner surface of the enclosing structures falls below the dew point, moisture from the indoor air may condense on it. Thermal characteristics of building materials, outdoor and indoor air temperatures and dew points are random variables or processes. This necessitates a probabilistic assessment of the possibility of thermal failures by the criterion of condensate formation in areas of increased heat transfer of enclosing structures. This work is performed in order to analyze the probabilistic thermal reliability of the characteristic units of brick walls of residential buildings erected in the second half of the 20th century, in the design condition and after thermal modernization by installing additional facade insulation. To analyze the level of thermal reliability, six characteristic units of brick walls were selected. The nodes were analyzed in the initial state, taking into account the uniform facade insulation, as well as with additional local insulation of areas of increased heat transfer. The calculations were performed according to the previously developed author's method, which is based on estimating the probability of falling of the random temperature of the inner surface of the wall below the random temperature of the dew point. The initial data take into account the statistical characteristics of the following random variables: conditional heat transfer resistance of the wall in the zone of heat conduction, dew point temperature, indoor air temperature, outside air temperature for each month of the heating period. The result of the calculation is the probable annual duration of the state of thermal failure according to the criterion of condensate formation on the inner surface of the walls in the critical areas of the nodes. It is established that the units of brick walls with a thickness of 51 cm in the design condition have an insufficient level of thermal reliability. Uniform facade insulation allows to reduce the duration of thermal failures of three nodes from the six considered to values not exceeding 10 minutes during the year. In some areas of the other three nodes (adjacency of the side and top faces of the window, adjacency of reinforced concrete balcony slab) the duration of thermal failures remains unacceptably long even when performing additional local insulation of these areas.
Profiled Steel Sheets of Steel-reinforced Concrete Floors Fixed Formwork Load-bearing Capacity Rational Use
Authors:   Educational and Scientific Institute of Architecture, Construction and Land Management, National University ", Semko Alexander ,   Yuri Kondratyuk Poltava Polytechnic", Hasenkо Аnton ,   Educational and Scientific Institute of Architecture, Construction and Land Management, National University "Yuri Kondratyuk Poltava Polytechnic", Fenko Oleksiy ,   Educational and Scientific Institute of Architecture, Construction and Land Management, National University "Yuri Kondratyuk Poltava Polytechnic", Dariienko Viktor ,   Central Ukrainian National Technical University
Published: October 2022

Building structures effective design should ensure uniform strength of all building load-bearing elements. Steel-reinforced concrete structures are made both during new construction and during the reconstruction of buildings or structures by a successful combination of steel, mainly rod elements, and monolithic concrete. Quite often, in order to increase the manufacturability of such floors installing and reduce the construction time, a monolithic reinforced concrete slab is arranged on a fixed formwork made of profiled flooring. To include a profiled sheet in compatible work with a monolithic slab, anchoring means are provided: protrusions on the sheets surface, rod reinforcement, etc. However, due to the usually equal pitch of the profiled sheets (steel beams) supports, they are unevenly stressed. On the basis of the conducted theoretical analysis, 6 slabs 6 m long, 1.06 m wide and 0.53 m made of K35-0.5 steel profiled flooring were designed, manufactured and tested according to a continuous three-span scheme, as a fixed formwork for monolithic steel-reinforced concrete floors. The samples were loaded with bricks. To measure deflections during sample loading, watch-type indicators with a division value of 0.01 mm were used. To measure strain electro tensile resistors were used. An analysis of supports installation variable step influence, as one of the methods of these floors load-bearing capacity use level balancing was carried out. It has been experimentally confirmed that when equalizing the values of the span or support bending moments (at the same time, the support moments are twice as large as the span), as well as deflections, the lengths of the extreme spans should be 25% less than the central spans.