bluuebunny/crossref_metadata_2025_split huggingface dataset:
The influence of the static component of the water supply network on the change in the power consumption of the pumping unit with frequency control
Authors: Kapansky A. A. , Pavlov V. V. 
Published: October 2023

RELEVANCE.The effective functioning of urban water supply systems plays an important role in maintaining the normal life of cities and towns. Of particular importance is the management of pressure and the optimization of hydraulic regimes in water-wired networks, since they directly affect the reliability of water supply and the efficient use of resources. However, the determination of the optimal parameters and methods of regulation in each specific case requires careful research and analysis. In the context of a constant increase in requirements for automation of water supply and growing investments in its infrastructure, the problem of a correct feasibility study for such investments is of particular relevance.PURPOSE. For smooth regulation of the pressure characteristic of the pump in the conditions of the need to maintain a given pressure of the water supply network, frequency converters are widely used. In the context of the significance of an accurate assessment of investment costs for the automation of pumping units, it becomes necessary to obtain equations that take into account the features of the operation of the water supply network at the pre-design stage. In this regard, the authors of the article set themselves the goal of studying the degree of influence of the static component of the water supply network on the change in the power consumption of the pumping unit with frequency regulation and testing the obtained dependencies on real statistics of the water and energy consumption modes of the Sozh water intake of the Gomel water utility.METHODS. To solve the tasks, classical formulas of similarity of the pumping unit were used, reflecting the relationship between flow, pressure and power consumption. The mean squared error, the mean absolute error and the average absolute error in percentages were used as the evaluation metric for verifying the electric power supply model of the pumping unit.RESULTS. The study demonstrates a significant improvement in the accuracy of power consumption modeling when using a modified coefficient reflecting the degree of power change when the frequency of the supply network changes. When using this approach, the standard error is reduced more than twice, from 0.35 to 0.167, the average absolute error is reduced from 0.347 to 0.165, and the average absolute percentage error is reduced from 0.20% to 0.08%.CONCLUSIONThe conducted research confirms the effectiveness of the use of frequency control of pumping units, which provides a nonlinear change in electrical power, and demonstrates the possibility of more accurate forecasting of electricity consumption, taking into account the specifics of the water supply network. The results of this work can be useful for projects to optimize urban water supply systems, providing more accurate planning and use of resources.
Development of the automatic system for switching on the generating equipment for parallel operation with the electric power system
Authors: Fyodorova V. A. , Kirichenko V. F. , Glazyrin G. V. 
Published: October 2023

RELEVANCE. Synchronization is an algorithm of actions to switch on synchronous generators for parallel operation with the power system and is an integral part of the power generation process. In practice, the process of synchronization involves some difficulties. The developed automatic synchronization device is digital and is integrated into the microprocessor terminal of the CPA-M complex, allowing to solve the arising problems by means of synchronization using different methods, including the developed method of accelerated synchronization.THE PURPOSE. Create a comprehensive automated synchronization system based on the CPA-M microprocessor terminal (manufactured by a Novosibirsk company) with a variability of methods. Analyze existing synchronization devices, synthesize traditional synchronization methods, create a non-traditional intermediate method on their basis and integrate it into the automated system. Develop algorithms for the measuring and logical units, as well as for the synchronization system output unit. Experimental testing of algorithms by feeding real signals from voltage sensors on a physical model with a rotating synchronous machine (12 kW generator under test).METHODS. The problem of research studied using theoretical and practical approaches. Theoretical methods - analysis, synthesis and classification. Practical methods - modeling in MatLab® environment, comparison, experiment, observation.RESULTS. The paper describes the architecture, construction principles, settings selection of the synchronization system, as well as the interaction of its logical part with adjacent units (measuring unit, output unit). The work gives a comprehensive description of the system setup and integration of its measuring and logic parts into the CPA-M microprocessor terminal with a test on a physical object.CONCLUSION. The system has extended functionality compared to analogs, allowing the use of traditional methods and the developed method of accelerated synchronization. The results predict reduction of capital costs for automation systems, as one device provides synchronization on several circuit breakers and reduction of generator operation costs, as using this system, machine parts exposed to unacceptable thermal and mechanical effects. The development is relevant for the elimination of emergencies in the power system and reducing thermal and dynamic impacts on the generator. The social importance of the project is the exclusion of the human factor. The prospect of using the development - in the educational process of the university and at real power facilities, in particular on large synchronous generators.
Increasing the production capacity of the chp by introducing fuel cells
Authors: Kirshina E. Yu. , Anikina I. D. 
Published: October 2023

RELEVANCE. Improving the efficiency of the plant with an increase in operating capacity is one of the priority tasks of the development of power plants. One of the solutions to this issue is the introduction of fuel cells as the main or additional source of power and heat. The development of a high-quality scheme for the introduction of fuel cells into thermal power plants will increase their production capacity with the possibility of further reducing the carbon footprint by reducing the consumption of natural gas.THE PURPOSE. To develop thermal power plant schemes in combination with fuel cells to increase the thermal efficiency of the thermal power plant. To consider the types of fuel cells and the principle of their operation and to analyze their effectiveness with justification of the choice of a specific type for further calculations. To study the methods and principles of hydrogen extraction with the choice of the optimal solution directly within the framework of this work. Perform a technical and economic analysis of the introduction of fuel cells to the station.METHODS. When solving this problem, we used a method based on the law of conservation of energy under stationary operating conditions of the circuits was used. The chosen calculation method was implemented using MatLab, DvigWT and Microsoft Excel software.RESULTS. This article presents three types of thermal power plant schemes in a layout with fuel cells and an indication of their specific advantages and disadvantages. The analysis of methods of hydrogen extraction with the choice of one of them by performing an estimate of the cost of hydrogen production is carried out. A technical and economic analysis of the introduction of fuel cells at the plant has been carried out, taking into account the cost of hydrogen production. The carbon footprint from the introduction of fuel cells at the station has been calculated.CONCLUSION. Using fuel cells at the CHP increases the production efficiency of electricity generation by more than 20%, and the power of the power generation unit increases by more than 30 MW. Calculations have shown that the use of fuel cells leads to a significant increase in production capacity, but it is necessary to study in more detail the methodology for calculating the fuel cells themselves and the ways of hydrogen production.
Experimental studies of electrical and mass transfer processes in reverse electrodialysis
Authors: Chichirov A. A. , Filimonova A. A. , Chichirova N. D. , Mayorov E. S. 
Published: October 2023

OBJECT. Experimental studies on optimization of the output electrical and mass transfer characteristics of the reverse electrodialysis process.METHODS. System analysis techniques were used in this work and a mathematical model was developed to describe the movement of water streams and the concentrations of substances in them. The equipment involved, designed for experimental and industrial testing of the proposed technologies with technical characteristics of the developed apparatuses and installations, is described.RESULTS. RED (reverse electrodialysis) is a new membrane technology for renewable energy production using salinity gradients. The ultimate goal of RED is to achieve the highest possible value of power density, which depends on several parameters related to the intrinsic electrochemical characteristics of the membranes, stack configuration (number of cell pairs, channel length), hydrodynamics, nature of the working solutions (ionic composition, concentration), and others. The paper presents experimental studies on the influence and modeling of various parameters of the reverse electrodialysis operation on the output electrical characteristics of the system.CONCLUSIONS. It is shown that the system output power is significantly influenced by the composition of solutions in the near-electrode chambers, external load and internal resistance, concentrations of working solutions and time of the experiment. The maximum electrical efficiency was 56% (power density 0.34 W/m2) in semi-industrial electrodialysis reverse electrodialysis experiments using model NaCl solutions, K3Fe(CN)6/K4Fe(CN)6 and Chinese 0.6 mm thick IONSEP membranes.
#NousSavons : en mission pour dire la vérité
Authors: Boursier Axel 
Published: October 2023

Background: In July 2021, in France, the hashtag “#NousSavons” (“#WeKnow”) emerged, aimed at rallying COVID skeptics on Twitter. Creating a genuine online community, this hashtag mobilized its members by having them question dominant forms of knowledge. This article examines the architecture of the discourses developed by the members of the #NousSavons community. Analysis: The analysis considers two of this community’s initiatives that supported a conspiracy-based perception of COVID-19: establishing the legitimacy of their perception of the crisis and publicizing this perception. Conclusions and implications: This article shows the diversity of evidence put forward by the community as well as the latter’s singular positioning with regard to the truth. It also analyzes the refinement of the communication practices that were implemented in order to convince members of the public sphere of the legitimacy of their viewpoint.
QUAIS OS PRINCIPAIS ASPECTOS AVALIATIVOS UTILIZADOS PELOS PROFESSORES NAS ATIVIDADES AVALIATIVAS NA EXPERIMENTAÇÃO
Authors: SOUZA BARROS DE OLIVEIRA JAQUELINE , GRASIELLY DA SILVA NASCIMENTO MARIA , VITÓRIA PEREIRA DE AGUIAR SILVA ÁUREA , Da Silva Lima Viana Kilma 
Published: October 2023

Essa pesquisa teve como principal objetivo de analisar as concepções e práticas avaliativas em atividades experimentais desenvolvidas em escolas do ensino médio por professores que ministram a disciplina de química e as suas relações com a aprendizagem de conceito na área. A pesquisa teve natureza qualitativa e o seu campo de pesquisa foi desenvolvido nas escolas da Rede Pública Estadual. Os sujeitos que participaram da pesquisa foi composta por um grupo de professores que ministram aulas de Química no Ensino Médio dessas escolas. Os instrumentos utilizados foram entrevistas semiestruturadas com os professores, participantes da pesquisa. Após nossa pesquisa, observamos que a experimentação faz parte da química, porém muitos professores não realizavam práticas experimentais em suas aulas ou quando realizam a forma de avaliação, muitas vezes, não dialogava com a proposta de ensino, além disso, os professores que ministram as aulas de químicas não são formados na área química. Destaca-se, nesta discussão, que os professores que ministram aula de química do ensino médio não realizam atividades experimentais pelo fato das escolas não possuírem um laboratório equipado, pois não consideram outras formas de aulas experimentais, sem o uso de laboratórios. Espera-se que essa pesquisa possa contribuir para a discussão acerca da avaliação em aulas experimentais no ensino de Química. Ademais, também, se espera que a pesquisa possa contribuir para a discussão acerca da avaliação no ensino de Química e suas relações com aprendizagem de conceitos.
NESİMİ ÇİMEN’İN ÂŞIKLIK GELENEĞİNDEKİ YERİ VE KAYNAKLIK ETTİĞİ ESERLERİN İNCELENMESİ
Authors: YAŞAR Servet , GÜLTEKİN Burak 
Published: October 2023

Âşıklar, farklı yetişme tarzlarıyla kimlik kazanan, değişik konularda irticalen şiir söyleyebilen ve aynı zamanda bu şiirleri sazı eşliğinde icra edebilen gezgin ya da yerel halk şairi olarak tanımlanan kişilerdir. Sözlü kültürün bir değer olarak yaşatılmasını, toplumsal yaşamdaki önemini korumasını ve sonraki nesillere aktarılmasını sağlayanlar da yine bu saz şairleridir. Bu anlamda âşıklar, kendinden önceki dönemin toplumsal hafızası olmuş ve bulunduğu döneme de ışık tutmuşlardır. Bu çalışmada, Orta Asya’dan günümüze kadar gelen âşıklık geleneği içerisindeki 20. yy. âşıklarından Âşık Nesimi Çimen konu edilmiştir. Literatür taraması ve eser analizi yöntemlerinin kullanıldığı araştırma kapsamında genel olarak ozanlık ve âşıklık geleneğinin tarihsel süreci ve günümüzdeki işlevliğinin yanı sıra Âşık Nesimi’nin hayatı, âşıklık geleneğindeki yeri ve TRT repertuvarında kaynaklık ettiği 9 eserin edebi ve müziksel açıdan incelenmesine yer verilmiştir.
Âşıklık geleneği içinde iki telli curanın son icracılarında olan Âşık Nesimi Çimen; sazında kullandığı düzen (Nesimi Düzeni), çalım sitili ve vokal icra biçimiyle bu geleneğin önemli temsilcileri arasında yer almıştır. Kaynaklık ettiği eserlerinde çoğunlukla Alevi inanç kültürü ve felsefesi çerçevesinde konu edinmiş şiirler öne çıkmaktadır. Usta malı ürünleri tercihinde özellikle Hakk Âşığı olarak bilinen tekke edebiyatı şairlerinin eserlerini sazı eşliğinde işleyerek günümüze kadar taşımıştır. Müzik icrası bağlamında ağırlıklı olarak deyiş müzik türünün öne çıktığı yapıtlarında, makamsal açıdan hüseyni ve uşşak makamı dizisinde; ritmik yapı bakımından ise ana, birleşik ve karma/değişken usul yapısında örneklere yer vermiştir. Eserlerinde biçim açısından ise ağırlıklı olarak bir bölümlü biçim özelliği gösteren müziksel yapıların hâkim olduğu gözlenmiştir.
СИСТЕМА ДЛЯ ВИЗНАЧЕННЯ КООРДИНАТ ДЖЕРЕЛА АКУСТИЧНОГО СИГНАЛУ НА ОСНОВІ РІЗНИЦЕВО-ЧАСОВОГО МЕТОДУ ТА МЕТОДІВ МАШИННОГО НАВЧАННЯ
Authors: АРТЕМУК Сергій , МИКИТИН Ігор 
Published: October 2023

У даній науковій статті пропонується система визначення координат джерела акустичного сигналу із використанням штучної нейронної мережі. Система використовує різниці часів реєстрації акустичного сигналу між сенсорами як вхідні дані для навчання нейронної мережі. Нейронна мережа використовує різниці часів реєстрації для визначення координат X та Y відповідного джерела.
Авторами запропоновано програмно-математичні моделі розташування сенсорів, які використовуються для навчання та перевірки нейронної мережі, а також для оцінки метрологічних характеристик системи визначення координат джерела акустичного сигналу. Програмно-математичні моделі надають змогу сконфігурувати такі параметри як: форма розташування сенсорів, відстань між ними, їх кількість, параметри нейронної мережі (кількість прихованих шарів та нейронів), та обсяг набору даних для навчання. Набір даних включає такі навчальні пари як різниця часу реєстрації акустиного сигналу та координати X та Y відповідного сигналу. Для перевірки нейронної мережі використовувалися два набори даних. Перший використовувався і для навчання нейроннної мережі і для перевірки. Другий не використовувався для навчання, а лише для перевірки. В даній роботі представлено структурну схему системи визначення координат джерела акустичного сигналу, а також блок-схему алгоритму навчання нейронної мережі, що застосовувався у даному дослідженні.
Проведено дослідження абсолютної похибки визначення координат X та Y джерела акустичного сигналу для конкретних параметрів системи. Найменша та найбільша відстань між сеснорами та джерелами акустичних сигналів становила 300 м та 1800 м відповідно. За результатами проведених досліджень встановлено, що середнє значення абсолютної похибки визначення координати Y не перевищувало 1.2 м, а за координатою X – 0.5 м. Максимальне значення абсолютної похибки не перевищувало 16 м для координати Y та 4.5 м для координати X.
МАТЕМАТИЧНА МОДЕЛЬ ЗМІНИ ШВИДКОСТІ ПЕРЕДАЧІ ДАНИХ В ЗАЛЕЖНОСТІ ВІД ЗМІНИ ДОВЖИНИ СЕГМЕНТУ СПЕЦІАЛІЗОВАНОЇ ЦИФРОВОЇ МЕРЕЖІ DEVICENET НА БАЗІ ТОВСТОГО КРУГЛОГО КАБЕЛЯ
Authors: БАБЧУК Сергій , БАБЧУК Ірина 
Published: October 2023

DeviceNet є цифровою спеціалізованою мережею, яка забезпечує взаємодію між промисловими контролерами та пристроями введення-виведення, надаючи користувачам економічно ефективну мережу для зчитування даних з давачів та керування виконавчими механізмами. В мережі DeviceNet один кабель використовується для передачі даних та для підведення напруги живлення до елементів мережі. Спеціалізовану цифрову мережу DeviceNet можна використовувати в системах автоматизації різних промислових підприємств. Спочатку було досліджено яка математична залежність буде найкраще відображати характер зміни швидкості передачі даних, що встановлена виробником мережі DeviceNet на сегментах даної мережі різної довжини. Встановлено, що з лінійної, степеневої, експоненціальної, поліномінальної, логарифмічної залежностей найкраще відображає характер зміни швидкості передачі даних від довжини сегменту спеціалізованої мережі DeviceNet на базі товстого круглого кабеля поліномінальна залежність. Встановлено математичну модель залежності швидкості передачі даних від довжини сегменту спеціалізованої мережі DeviceNet на базі товстого круглого кабеля, яка відображає залежність зміни швидкості передачі даних в мережі DeviceNet на базі товстого круглого кабеля від довжини сегменту з похибкою до 0,85%. Встановлена математична модель залежності зміни швидкості передачі даних від довжини сегменту спеціалізованої мережі DeviceNet на базі товстого круглого кабеля сприятиме ефективнішому проектуванню систем контролю та керування на базі мережі DeviceNet.
Performance of Perioperative Antibiotic Prophylaxis in Operative Urology
Authors: Popov S.V. , Guseynov R.G. , Sivak K.V. , Perepelitsa V.V. 
Published: October 2023

Introduction. Currently, the question of the need for perioperative antibiotic prophylaxis (PAP) during urological operations remains debatable due to the insufficiency of the database that would prove the expediency of mandatory use of PAP to prevent the development of infectious complications in the surgical treatment of urological diseases. The aim of this study was to assess the effect of perioperative antibiotic prophylaxis on the frequency of febrile temperature, leukocytosis, increased serum levels of C-reactive protein, and bacteriuria after various urological interventions. Patients and methods. Method of the study was the analysis of the occurrence of febrile temperature, leukocytosis, increased serum concentration of C-reactive protein, and bacteriuria in the early period after various urological interventions (n=1518) performed in men and women from group 1 (n=753) using perioperative antibiotic prophylaxis (ceftriaxone administered intravenously one hour before the beginning of the intervention (before the incision) at the usual therapeutic dose, equal to 2 g) or without the use of PAP in patients from group 2 (n=765) at the Department of Urology of the St. Petersburg State Budgetary Healthcare Institution St. Luke’s Clinical Hospital. Results. In urological patients treated surgically, the appearance in the early postoperative period of bacteriuria, febrile temperature, leukocytosis, and elevated serum CRP levels was observed only in isolated cases with a frequency of occurrence that did not statistically significantly differ between group 1, where patients were injected intravenously with 2 grams of ceftriaxone 1 hour before the operation, and group 2, the participants of which did not receive PAP. In both groups, the results of the study were not affected by the duration of the intervention and the history of diseases contributing to the development of infectious complications (diabetes mellitus, chronic heart failure, COPD, obesity). Conclusion. Apparently, the question of indications for perioperative antibiotic prophylaxis in the surgical treatment of patients with various diseases of the urological profile remains open, and further research in this direction is relevant.
Impact of Tourist Destinations in Central Ukraine on the Mental Paradigm of Ukrainian Society
Authors: Berest Paulo 
Published: October 2023

The purpose of the article is to study the specific character of the relationship between the socio-cultural phenomena of tourist destinations and mentality; to analyse the impact made by the culture-building potential of destinations in Central Ukraine, their sacred and spiritual significance on the mental paradigm of Ukrainian society; to understand the historical and cultural sights and tourist destinations in Central Ukraine as important components in the formation of the mentality and preservation of the national identity of Ukrainians. The research methodology and the main methods of research are based on the application of a comprehensive interdisciplinary approach, the study of the scientific contributions made by the researchers in the field of cultural studies, philosophy, history of tourism, sociology, and other related disciplines. The article uses general scientific and special methods of scientific knowledge, in particular analysis, synthesis, genetic, cultural, and other methods. The scientific novelty of the paper lies in the determined need to understand the interrelationship of the development processes of tourist destinations in Central Ukraine and their impact on the mental paradigm of Ukrainian society from the standpoint of cultural studies; in the analysis of the impact of tourist destinations in Central Ukraine and the self-identification and mentality of Ukrainians. Conclusions. The result of the research is the determined existence of the impact of tourist destinations in Central Ukraine on the formation of the mental paradigm of Ukrainian society and their interrelationship. Moreover, the conclusions are the identification and highlighting of the socio-cultural potential of Central Ukraine destinations, their sacred and spiritual significance for the mental paradigm of Ukrainian society, both in historical retrospect and in the present.
Keywords: tourist destinations, mental paradigm, Ukrainian society, culturology of tourism, Central Ukraine.
PENDAMPINGAN PEMBUATAN MERK USAHA GULA MERAH PADA DUSUN DUKUH RT 5 RW 2 DESA REGUNUNG KEC. TENGARAN
Authors: Rahmawati Roselina , Pangesti Rendy Dwi , Isnubroto Danang , Mahbub Jamal 
Published: October 2023

<p>Desa Regunung merupakan salah satu desa yang ada di Kecamatan Tengaran, kabupaten Semarang. Desa Regunung terdiri dari 7 dusun, yaitu dusun Dukuh, Gumuk, Gumukrejo, Karanggondang, Ngaduman, Krajan, dan Kragilan. Usaha pembuatan gula merah ini terletak di Dusun Dukuh. Ibu Kalimah sebagai pebuat gula merah ini telah memulai usaha pembuatan gula merah ini selama 10 tahun. Produk gula merah ibu Kalimah dijual secara sederhana dan tidak mempunyai logo dan merk usaha. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk membantu ibu kalimah mempunyai logo dan merk usaha. Dengan adanya logo dan merk usaha ini diharapkan dapat meningkatkan penjualan gula merah ibu Kalimah.</p>