bluuebunny/crossref_metadata_2025 huggingface dataset:
The Digital Economy Promotes Rural Revitalization: An Empirical Analysis of Xinjiang in China
Authors: Zhu Lin , Mei Xuehui , Xiao Zhengqing
Published: August 2023

The digital economy now plays a pivotal role in reshaping the global economic structure and optimizing the allocation of resources. With the popularization of digital technology in rural areas, the impact of the digital economy on rural development is also increasing. In order to explore the impact of the digital economy on rural revitalization in Xinjiang of China, this study constructed an indicator system based on the data from 14 prefectures or cities (of the same administrative level as the prefectures) in Xinjiang from 2013 to 2019. The entropy weight method and coupling coordination degree (CCD) model were used to analyze the digital economy level (DEL) and rural revitalization level (RRL) in Xinjiang, and the relationship between the digital economy and rural revitalization was emphasized. Finally, the obstacle degree model was used to reveal the factors that hinder the coupled and coordinated development between the digital economy and rural revitalization. The research shows that: (1) Xinjiang’s DEL generally increased steadily, and digital economy development in 14 prefectures or cities had strong spatial heterogeneity. At the same time, Xinjiang’s RRL showed similar characteristics. (2) The CCD between the two systems was increasing, and the regional distribution features of high-level CCD were in northern Xinjiang and low-level CCD in southern Xinjiang. The coupling coordination was in its infancy, but the interaction between the two systems was increasing, and the development prospect was broad. (3) Overall, the main obstacle affecting the CCD between the digital economy and rural revitalization was the digital infrastructure among four factors, including digital investment, thriving businesses, social etiquette and civility, and effective governance. The degree of this obstacle varied in different phases of coupling coordination development.
Assessing the Degradation of Safety Management Performance in Large Construction Projects: An Investigation and Decision Model Based on Complex Network Modeling
Authors: Guo Haidong , Gao Xingshan , Lin Qiangqiang , Gao Baosheng
Published: August 2023

Modern safety control theory suggests that the accumulation of safety management defects at the organizational level can lead to a degradation in the overall safety management performance. This problem is exacerbated by the increasing complexity of safety management in large construction projects. The theoretical frameworks proposed by existing studies can provide generalized guidance for identifying safety management defects, but they are not flexible enough to address the complexity of a safety management system (SMS) in specific large construction projects. This study proposed an investigation and decision model based on a complex network model of SMSs. The main purpose was to accurately assess the degradation of safety management performance through the comprehensive identification of safety management defects for large construction projects. The functional components and their interactions in SMSs were graphically represented in a complex network using the fuzzy DEMATEL technique. Based on this, deep-seated safety management defects were identified by tracing the path of influence between the functional components and their roots. Furthermore, the results of this identification were used to support the assessment of the degradation of the safety performance of the overall SMS. The proposed model was verified with a large-scale wastewater treatment plant construction project in Lanzhou City, China. The degradation of the functional components could be presented in a complex visual network map to facilitate an understanding of the weak points or risk-sensitive areas throughout the SMS. Especially in the case of false safety perceptions, deep-seated safety management defects can be identified in time to prevent a sudden collapse of the SMS through early warnings. In addition, it also facilitates timely short-term improvement strategies and systematic long-term improvement strategies for long-term sustainability and increased resilience.
A Review of Conventional versus Additive Manufacturing for Metals: Life-Cycle Environmental and Economic Analysis
Authors: Mecheter Asma , Tarlochan Faris , Kucukvar Murat
Published: August 2023

Additive manufacturing (AM) is a recent emerging technology that is being adopted in various industry sectors and supply chains. Life cycle assessment (LCA) and life cycle costing (LCC) are powerful methods that can be used for assessing the environmental and economic performance of emerging manufacturing technologies. This study aims to evaluate the life cycle environmental impacts and cost of computerized numerical control-based (CNC) manufacturing and direct metal laser sintering technology (DMLS) through a cradle-to-gate life cycle analysis. This research has four main novel elements: (i) conducting a recent comprehensive review of metal AM and conventional manufacturing (CM) processes using a systematic method and meta-analysis (ii) comparing the conventional process “CNC machining” and the additive technology “direct metal laser sintering” from the environmental (LCA) and economic (LCC) perspectives, (iii) investigating the influence of geometry complexity and shape size factors on the environmental and cost performance of both manufacturing methods, and (iv) conducting a Monte Carlo simulation-based sensitivity analysis to tackle uncertainty in LCC input parameters. The midpoints and endpoints impact for CNC and AM processes were estimated using the Ecoinvent v3.8 database and ReCiPe (E) impact assessment method. The review revealed that global warming potential is one of the most widely studied environmental indicators; however, only 6% of the studies have investigated the life cycle economic impacts of AM technologies using sensitivity and uncertainty analysis. The results have shown that in terms of ReCiPe endpoints, DMLS has the highest environmental impact on human health while CM has more impact on the eco-system quality. Electricity consumption is the main contributor to environmental impact categories in both manufacturing technologies. This is due to the high electricity utilization for casting and milling conventionally manufactured parts and printing the AM parts. LCC net present values revealed that manufacturing all parts with AM costs 91% more compared to CNC. The LCC analysis has shown that AM is more suitable and cost-effective for parts with highly complex geometries. Whereas CNC machining was found to be economically feasible for large-sized and low-complexity parts. The Monte Carlo sensitivity analysis demonstrated that for the case of AM, the most significant parameter is the processing cost followed by material cost, which highlighted the importance of energy-efficient AM and dematerialization through design for circularity.
Assessing the Impact of a Regional Integration Policy on Corporate Environmental Performance: Micro-Evidence from Chinese Industrial Firms
Authors: Zhang Xiang , Long Xuhui , Zhang Zongyi , Yu Chenyang , Huang Rong
Published: August 2023

Environmental performance is extremely vital for sustainable growth in China, and the impact of a regional integration policy plays an important role in improving environmental performance. However, current studies are weak in causal inference, and firm-level evidence is lacking. As a result, taking the Outline of the Pearl River Delta Reform and Development Plan as a quasi-natural experiment, with propensity score matching and difference-in-differences methods, this paper investigates the effect of regional integration on firms’ environmental performance. Our empirical results show that regional integration can significantly improve corporate environmental performance; specifically, the regional integration will result in an increase in the output value, of 46.7%, 22.3%, and 68.1% per unit emission of sulfur dioxide (SO2), industrial wastewater (WATER), and industrial smoke and dust (SD). Moreover, the impact of regional integration differs across different industries. For SO2, the impact of regional integration is greater for the petroleum processing, coking and nuclear fuel processing industries, and special equipment manufacturing; in terms of WATER, the impact is much higher in the tobacco products industry and printing and the reproduction of recording media industry; for SD, the petroleum processing, coking, and nuclear fuel processing industries are highly impacted. Finally, this impact also differs for core and peripheral cities. For policy implications, first, regional integration policies are highly recommended, and China is implementing regional integration in the Beijing–Tianjin–Hebei area and Yangtze River Delta, and these policies should be enhanced for other areas. Second, to maximize the effect of regional integration, the government needs to combine regional industrial structural characteristics to formulate industrial and environmental policies.
Adding Sustainability in Analytical Chemistry Education through Monitoring Aquarium Water Quality
Authors: Rosales-Conrado Noelia , Peña-Martínez Juan
Published: August 2023

This paper introduces a captivating topic for upper-level analytical chemistry capstone projects, focusing on aquarium water analysis. This provides a more comprehensive understanding of the role of analytical chemistry towards sustainability and its environmental, economic, societal and education dimensions. Regarding the crucial role of maintaining optimal aquarium water quality for the welfare of aquatic life, students are tasked with envisioning and executing the measurement of key parameters, including pH, ammonium, nitrite, and nitrate contents. This hands-on experience not only engages students in real-world applications, but also allows them to delve into essential analytical chemistry principles. They carefully select measurement methods, considering factors such as instrument availability, ease of use, precision and sensitivity requirements, sample size, and matrix effects. Besides fostering the acquisition of technical and soft skills, one notable aspect of this type of project is the exceptionally high student satisfaction. Furthermore, the project’s outcomes have proven to be significant predictors of learning achievements. Additionally, it lays the foundation for exploring potential designs of aquaponics systems and fosters interdisciplinary projects, expanding the practical applications in the field of chemistry education. Overall, these projects exemplify enriching and engaging educational experiences that empower students with valuable skills and knowledge while encouraging them to explore novel avenues in analytical chemistry.
Symmetric Difference Operators Derived from Overlap and Grouping Functions
Authors: Hu Bo , He Di , Dai Songsong
Published: August 2023

This paper introduces the concept of symmetric difference operators in terms of overlap and grouping functions, for which the associativity property is not strongly required. These symmetric difference operators are weaker than symmetric difference operators in terms of positive and continuous t-norms and t-conorms. Therefore, in the sense of the characters of mathematics, these operators do not necessarily satisfy certain properties, such as associativity and the neutrality principle. We analyze several related important properties based on two models of symmetric differences.
A Tribute to Professor Jianguo Wu
Authors: Chen Xin
Published: August 2023

It has been a couple of months since Professor Jianguo Wu left us [...]
Investigation of the Causes of Railway Track Gauge Narrowing
Authors: Bocz Péter , Liegner Nándor , Vinkó Ákos , Fischer Szabolcs
Published: August 2023

On behalf of MÁV Hungarian State Railways Ltd., the authors carried out a research and development (R&D) project on behalf of the Budapest University of Technology and Economics, Department of Highway and Railway Engineering, on the subject of “Research and investigation of the causes of gauge narrowing by finite-element modeling in running track and turnout, and under operational and laboratory conditions”. The main objective of the research was to investigate the causes of localized defects of gauge narrowing in railway tracks based on machine and manual track measurements, laboratory measurements, and theoretical considerations. The measures proposed as a consequence of identifying the causes could significantly contribute to reducing the number and extent of local defects in the future. Furthermore, the research aims to develop new theories in less scientifically mature areas and provide procedures and instructions that professional engineers and practitioners can easily apply. The main areas of research, which are not exhaustive, are as follows: (i) the evaluation of the measurement results provided by track geometry measuring and recording cars; (ii) on-site investigations in the railway track in terms of gauge and rail profile measurements; and, based on these, (iii) the selection of concrete sleepers, which were removed from the track and subjected to more detailed geometrical investigations in the laboratory, together with the components of the rail reinforcement; (iv) the track–vehicle connection, tight running in straight and curved track sections under track confinement; (v) modeling of the stability and deflection of the rail when the rail fastenings lose part of their supporting function; and (vi) finite element modeling of the concrete sleepers under operating conditions such as slow deformation of the concrete, temperature variation effects, and lateral support on the ballast. In the already-narrowed track section, the tight vehicle running is not the cause of the track gauge narrowing but a consequence, so it is not investigated in this paper.
Fluvial Hydraulics in the Presence of Vegetation in Channels
Authors: Afzalimehr Hossein , Sui Jueyi
Published: August 2023

In many semi- and arid regions, water does not flow from middle spring to early fall, leading to the development of vegetation patches with irregular distribution on channel beds and banks [...]
Vibration and Image Texture Data Fusion-Based Terrain Classification Using WKNN for Tracked Robots
Authors: Wang Hui , Lu En , Zhao Xin , Xue Jialin
Published: August 2023

For terrain recognition needs during vehicle driving, this paper carries out terrain classification research based on vibration and image information. Twenty time-domain features and eight frequency-domain features of vibration signals that are highly correlated with terrain are selected, and principal component analysis (PCA) is used to reduce the dimensionality of the time-domain and frequency-domain features and retain the main information. Meanwhile, the texture features of the terrain images are extracted using the gray-level co-occurrence matrix (GLCM) technique, and the feature information of the vibration and images are fused in the feature layer. Then, the improved weighted K-nearest neighbor (WKNN) algorithm is used to achieve the terrain classification during the travel process of tracked robots. Finally, the experimental results verify that the proposed method improves the terrain classification accuracy of the tracked robot and provides a basis for improving the stable autonomous driving of tracked vehicles.
THE INFLUENCE OF DIGITAL BUSINESS TO INDRAGIRI HULU ECONOMY
Authors: Saputra Raja Marwan Indra , Fransinatra Ziko , Suharmiyati Suharmiyati , Sholihat Walmi
Published: August 2023

The economic component of digital business is built on the usage and empowerment of digital information and communication technology. The digital economy in Southeast Asia is quickly expanding, as is the market potential. The goal of this study is to determine the influence of the digital business economy in the development of Indonesia's modern market economy. The technique employed is library research or library research. Findings of this study shows the existence of digital trade produces creative quality presentations, one of which is better negotiations, in the presentation of delivery or business style, so the industry is currently required to adapt in order to cope with current and future businesses. Modern and traditional marketplaces cannot coexist because both are vital to the Indragiri Hulu Regency.
DIGITAL TECHNOLOGY BASED BUSINESS MODEL DESIGN ANALYSIS
Authors: Fransinatra Ziko , Adjie Gerhana , Saputra Raja Marwan Indra
Published: August 2023

This research investigates how digital technology aid in the development of new business models in the creative industries. A holistic business model framework was built through a thorough literature study, which was then utilized to assess empirical evidence from the creative industries. According to the findings, digital technology have permitted widespread changes in company structures, and several noteworthy patterns have emerged. However, the redesigned business models are frequently not 'new' in the sense of being unprecedented. Business model innovation primarily manifests itself in the use of digital technology to enable the deployment of a broader choice of business models than was previously available to a corporation. The increasing adoption of numerous business models as a portfolio inside one corporation is a key rising trend. This occurs in enterprises of all sizes when a single firm employs numerous business models to service distinct market groups, offer different products, or engage in multi-sided markets, or employs changing business models over time. A recursive learning process refines and extends the holistic business model framework, which can serve as a cognitive instrument for comprehending business models as well as a planning tool for business model improvements. The study advances our understanding of business model theory and how digital technologies enable business model innovation in the creative industries. Three new study topics for the future are emphasized.
VILLAGE DEVELOPMENT IMPLEMENTATION ANALYSIS IN REDANG VILLAGE, RENGAT BARAT DISTRICT INDRAGIRI HULU DISTRICT
Authors: Rahayu Tri
Published: August 2023

This study aims to determine the implementation of village development in the village of Redang, West Rengat District, Indragiri Hulu Regency, which has been carried out in accordance with a predetermined village program, type and source of data; primary data and secondary data; The sample in this study was 123 key informants , 5 people (Village Head, Village Secretary, BPD Chairperson, and 2 community leaders; Data collection techniques: Observations, Questionnaires, Interviews. To analyze the data in this study, the researcher used a qualitative descriptive approach. .Results of research analysis that the implementation of development in the village of Redang, West Rengat District, Indragiri Hulu Regency has not been in accordance with what was expected by the community , development also still needs to be followed up and improved from several programs and developments that have not been realized.
IMPLEMENTATION OF PERFORMANCE ASSESSMENT OF INDRAGIRI INSTITUTE OF TECHNOLOGY AND BUSINESS USING THE SIMPLE ADDITIVE WEIGHTING (SAW) METHOD
Authors: Karseno Doni , Hendrik Billy
Published: August 2023

Employee performance appraisal system is a system used to assess the best performance of its employees. Institutions or institutions conduct the best performance appraisal of their employees to evaluate, verify, motivate to improve its performance. The results of this performance are used to find out or help make decisions, which results of these decisions have an impact on the employees themselves, such as promotions, demotions, dismissals, bonuses and deductions for employees. In the assessment of research conducted using 6 criteria: Presence, Attitude , Craft , Creativity, quality and quantity using the Simple Additive Weighting (SAW) method . The basic concept of the Simple Additive Weighting (SAW) method is to find the weighted sum of the performance ratings for each alternative on all attributes. The Simple Additive Weighting (SAW) method can help decision makers to produce the greatest value as the best alternative . In this study, testing was carried out on 75 respondent data. From calculations and testing, data accuracy of 100% is obtained, that is, the amount of data that is suitable is divided by the amount of data being tested multiplied by 100%.
GUTIERREZ DE LOS RIOS E O ELOGIO DA PINTURA DE PHILIPE NUNES
Authors: Quinet Pifano Raquel
Published: August 2023

O artigo visa refletir sobre o pensamento artístico lusitano do século XVII a partir do tratado de pintura de Philipe Nunes. Predomina em tal tratado o tom da defesa da liberalida de da pintura, denunciando o estatuto social da pintura em Portugal da época. Identifica-se o tratado do espanhol Gutierrez de los Rios como modelo teórico para Nunes.
An Assessment of Agriculture and Natural Resource Extension Program Needs on American Indian Reservations in Idaho, Nevada, Oregon, and Washington
Authors: Singletary Loretta , Emm Staci , Hill George
Published: August 2023

This article summarizes the results of a needs assessment involving American Indians and outreach professionals on reservations in Idaho, Nevada, Oregon and Washington. The survey featured 36 questions about agricultural and natural resource issues that may pose challenges on reservation lands. A comparison between reservation residents and outreach professionals indicates that issue perceptions differ significantly for 23 of the 36 issues. Acknowledging these perceptual differences can help Extension to identify program gaps and opportunities with tribal nations. It can also increase Extension's appreciation for cultural diversity, thereby improving its capacity to execute its outreach mission on American Indian reservations.
Local Food Tourism Networks and Word of Mouth
Authors: Dougherty Michael , Green Gary
Published: August 2023

This article draws from surveys of three key components of local food tourism networks: farmers, restaurateurs, and tourists. Key informant interviews were also conducted to complement survey data. Results indicate that word of mouth is central to forming and maintaining local food tourism networks because it links farmers and restaurateurs. Also tourists become aware of tourism opportunities primarily through word of mouth. For these reasons, Extension educators must consider word of mouth when promoting local food tourism. Word of mouth requires time to form "naturally." Therefore, practitioners must create opportunities to link the different hubs in local food tourism networks.
Using an Asset-Based Community Development Initiative to Attract and Retain Young People
Authors: Andersen William
Published: August 2023

An asset-based community development effort was conducted in Northern Wisconsin and the Upper Peninsula of Michigan to attract and retain young people in an effort to reverse the region's decades-long population decline. Nearly 700 of the community's high school students, college students, and young professionals participated in a survey to identify the features of the community that its young people considered as assets. The grassroots, community-based Gogebic Range Next Generation Initiative collaborated with a number of community institutions to promote, strengthen and connect young people to these identified assets.
Functional Foods Programs Serve as a Vehicle to Provide Nutrition Education to Groups
Authors: Cirignnano Sherri
Published: August 2023

An increase in consumer interest in functional foods provides an opportunity for FCS educators to use this topic in Extension programming to promote current nutrition recommendations. The Functional Foods for Life Educational Programs (FFL) are a curriculum of six evidence-based mini-seminars that highlight specific functional foods that have the potential to benefit health. Program participants are introduced to a variety of facts about each food, including research findings and consumption recommendations. FFL has reached a large and varied audience and ha generated preliminary positive outcomes. This article explores the FFL model as an option for providing nutrition education to groups.
Goal Setting: A Strategy for Reducing Health Disparities
Authors: Young Tara , Barrett Gloria , Martin Anna , Metz Diane
Published: August 2023

The Healthy Rewards study tested the effectiveness of goal setting to encourage behavior change in Latino and African American adults in three northern California counties. Four groups of adults were alternately assigned to receive either 1) basic health promotion and nutrition education without goal setting (control) or 2) the same education with personal goal setting. Participants (n=31) attended four 2-hour weekly sessions over 1 month. While the community-based education was effective in promoting participant behavior change overall, the goal-setting groups reported even greater change than groups who did not engage in goal setting.
Weight-Control Practices Reported by Students in a Maine Middle School
Authors: Maijka Alan
Published: August 2023

Extension professionals who work with youth are often faced with issues of body weight, diet and/or body image. How we handle these topics has the potential to either help or harm. The goal of the study reported here was to explore the prevalence and types of weight-control methods practiced by middle school students. The majority of students reported practices that have been previously associated with increased risk for becoming overweight. Those who work with children should be careful to avoid contributing to the tendency for children to begin weight-control practices that may paradoxically increase their risk for becoming overweight.
Resources Inventory of Beef and Dairy Operations for the Use of Ethanol Coproducts
Authors: Navarro Julie , Snyder Lori , Lemenager Ronald , Claeys Matthew
Published: August 2023

To remain competitive in the industry, beef and dairy producers in the Midwest need to adapt to the use of alternative feeds and take advantage of the expected abundance and favorable pricing of biofuel coproducts. Integrating the coproducts as feed ingredients could make the livestock industry significantly more attractive and competitive in domestic and global markets. A survey instrument was created to inventory resources that currently limit (or enable) the use of biofuel coproducts by small and medium-sized beef and dairy producers in the state of Indiana. Seventy-eight of Indiana's 92 counties were represented in the survey results.
Ozzie and Harriet Never Were: A Century Review of Family and Consumer Sciences and the Changing American Family
Authors: Allen Kimberly , Dunn Carolyn , Zaslow Sandra
Published: August 2023

As North Carolina FCS celebrates its 100-year centennial, it is time to reflect. For a century, FCS professionals have helped families apply research-based knowledge and principles. This article describes how American families have changed and how we have met those changes in our Extension roles. We also challenge FCS professionals to view the changing trends without bias. Ozzie and Harriet never were a fair representation of family norms, and we must accept the variety of family forms and functions so that our services can be of use to all families, especially those that may not fit the ideal American family.
Pasture-Based Dairying in Michigan: Farmer Practices and Needs
Authors: Haan Mat , Conner David , Taylor Phil
Published: August 2023

We report results of a survey designed to assess the information needs of Michigan dairy farmers currently using pasture as part of their management system. Differences were found among farmers in the extent to which they use conserved feed to supplement pasture. Similarities existed among farmers in challenges, information needs, and information sources. Findings suggest several initiatives, including website development, pasture walks, and workshops, that can be used by educators to reach this target audience.
Developing a Roadmap for Excellence in Extension
Authors: Saunders Kristine , Reese Diane
Published: August 2023

Trying to figure out the promotion and tenure system is one of the major stressors for new Extension faculty. To help new county-based Extension faculty, their supervisors, committee chairs, and other mentors evaluate progress in the probationary years, a Roadmap with specific guideposts delineating expectations for pre-tenure years was developed. This article describes the evaluation parameters standardized in the role statement and the expectations for new faculty outlined in the Roadmap.
Obtaining Valid and Useful Evaluations from Immigrant Conference Participants
Authors: Tong Cindy , Tilsen Joci , Bartholomay Tom
Published: August 2023

Obtaining valid and useful evaluations from immigrant farmers at conferences can be challenging, because they need to be culturally sensitive, inexpensive, and easily translatable and to satisfy goals of funders and conference organizers. Evaluations requiring conference attendees to think in terms of degree of satisfaction were too complicated to use. Modified DOTS surveys worked well given enough time for translation, but still presented some problems.
Pemodelan Sistem Deteksi Kadar Unsur Hara Tanah Berdasarkan Nilai NPK Menggunakan Metode Fuzzy Mamdani
Authors: Zulkham Umar Rosyidin  , Dityo Kreshna Argeshwara  , Aji Prasetya Wibawa  , Anik Nur Handayani  , Mokh. Sholihul Hadi
Published: August 2023

Profil kesuburan tanah merupakan hal yang penting dalam pertanian karena merupakan media utama dalam bercocok tanam. Penggunaan pupuk kimia dan pestisida secara terus menerus dan berlebihan akan dapat menimbulkan perubahan sifat fisika dan kimia tanah yang pada akhirnya akan dapat menyebabkan tanah menjadi kritis. Hal ini akan berpengaruh pada produktivitas hasil panen para petani. Salah satu upaya untuk mengetahui tingkat kesuburan tanah adalah melalui diagnosa unsur hara dalam tanah. Tujuan penelitian ini adalah untuk membuat pemodelan sistem optimalisasi deteksi kadar unsur hara dalam tanah menggunakan fuzzy. Melalui simulasi ini akan didapatkan data kadar unsur hara tanah dengan parameter unsur hara N (Nitrogen), P (Fosfor) , K (Kalium) menggunakan labview. Berdasarkan parameter tersebut kemudian dihasilkan berapa nilai kadar unsur hara NPK dalam tanah apakah rendah, sedang atau tinggi.
SOFTWARE FOR SCANNING THE BRIGHTNESS OF THE RASTER IMAGES PIXELS
Authors: Ivon A.I. , Istushkin V.F. , Belugina V.O.
Published: August 2023

A web-application for scan by program way of the analog oscillograms raster images when measuring the parameters of pulsed signals is described. As a criterion for selecting scan-ning points the maximum brightness of pixels on the signal lines of the oscillogram raster image is using.
Using Spring Framework to develop web applications
Authors: Nataliya Matveeva , Kurulo Mokhov
Published: August 2023

Spring Framework is a popular platform for creating web applications. It consists of a container, an element management platform, and a set of integrated services for web user interfaces, transactions, and state retention. Spring has a modular structure. This allows you to use only those modules that are needed for a specific application and write clean and accessible code. The purpose of the work is to find and develop the most acceptable conditions for creating a forum of programmers. Users will be able to view profiles of other users, top-ics, answer questions or create their own. The web application was created using the Java programming language in the In-telliJ IDEA 2022 development environment. The Spring Boot framework technology stack was used; Spring Data JPA; jQuery library; Bootstrap framework; database Post-greSQL 12 and pgAdmin4. The project uses the MVC (model-view-controller) design pattern. According to the architectural feature of such a template, the system can be divided into three inter-connected parts, the first is a data model, the second is a view representing the user in-terface, and the third is a control module. To create a software product, a relational database was developed, which con-nects all subjects with connections. The software application consists of several web pages, the feature each of them is the implementation of certain functionality and restrictions on access rights.
FEATURES OF THE .NET MAUI FRAMEWORK FOR CREATING A CROSS-PLATFORM APPLICATIONS
Authors: Ponomarev I.V.
Published: August 2023

Modern technologies that allow you to create applications for several different platforms optimize the development process. The recently released .NET MAUI platform is a new mile-stone in the development of cross-platform development technology. The possibilities of the platform provided to the programmer and the features of creating applications are consid-ered.
Asynchronous communication of microservices
Authors: Volodymyr Gerasymov , Denys Druzhynin
Published: August 2023

More and more business projects use microservice architecture, where large scale and long evolution of the project with the involvement of many developers are expected. This is due to the flexibility of scaling, the possibility of continuous deployment, ease of maintenance, and different teams can work on services without affecting the work pro-cesses as a whole, which is impossible with other architectural styles. Since micro-services are a complex structure consisting of independently designed and deployed ser-vices, communication between them can become a bottleneck, so we must be careful when considering asynchronous communication tools. The most popular open-source tools for asynchronous communication between RabbitMQ and Kafka services are considered. Although RabbitMQ and Kafka are some-times used interchangeably, their implementations are very different from each other. As a result, we cannot consider them as members of the same instrument category; one is a message broker, and the other is a distributed streaming platform. RabbitMQ is best used when we need: advanced and flexible routing rules, mes-sage timing control (managing message expiration or message delay). Advanced fault handling capabilities in cases where consumers are likely to be unable to process mes-sages (temporarily or permanently), simple implementations for consumers. Kafka is used when strict ordering of messages is required, the storage of messages for long periods of time, including the ability to replay past messages, and the ability to achieve high scale when traditional solutions are insufficient. We can implement most use cases using both platforms. However, the project ar-chitect must choose the most appropriate tool for the job. In making this choice, we must consider differences, as noted above. In other cases, when developing complex software systems, it may be tempting to implement all of the necessary messaging use cases using one platform when there are many advantages to using both platforms.
APPROXIMATION OF THE THERMOPHYSICAL PROPERTIES OF HIGH-TEMPERATURE GAS
Authors: Tokareva O.L. , Ihnatiev O.D. , Priadko O.V.
Published: August 2023

For the numerical study of high-temperature gas-dynamic processes, approximating dependences of the thermophysical properties of air on temperature are proposed. The approximation error averaged over the temperature series does not exceed 0.87%. Air at high temperatures in terms of molecular transport properties is quite close to other loose multicomponent partially dissociated and ionized gas mixtures, such as products of rocket fuel combustion in a rocket engine nozzle. The advantage of the approach to the development of approximating dependences of the physical properties of high-temperature gases is the possibility of their use in multifunctional software packages for numerical simulation and engineering analysis. The approximating dependences of thermo physical properties were used to study by means of the ANSYS software package the processes occurring in the nozzles of rocket engines. The physical characteristics of the air, calculated according to the proposed dependences, ensured that the polytropic index corresponded to the data on the combustion products of a real rocket engine. A mechanism is proposed for matching data from different sources due to the deterioration of the approximation in the vicinity of the boundary. The use of the technique for well-consistent data is acceptable and does not lead to a noticeable decrease in the approximation quality near the boundary. An approach is proposed for approximating multiparameter dependencies.
Study of the flow structure during the injection of detonation products into the supersonic nozzle
Authors: Stepan Vasyliv , Kateryna Ternova
Published: August 2023

The gradual unloading of the space stage by undocking objects from it or an emer-gency situation due to the undocking of one of the spacecraft leads to mass asymmetry. In outer space there is also the problem of the collision of a space object with elements of space debris. Therefore, the relevance of the topic of this work is determined by the need to develop a system for avoiding the collision of a rocket with elements of space de-bris and controlling the flight, observing the programmed trajectory of movement. The gas-dynamic aircraft system is characterized by the highest speed control. Injection of detonation products into the supercritical part of the nozzle was used as a gas-dynamic system. Modeling was carried out in the SolidWorks application software package. The purpose of the work is to develop alternative methods of the thrust vector control of the upper stage rocket engine. The scheme of the system for the thrust vector control of a rocket engine by the effect of a detonation wave on the gas flow in its nozzle has been developed. The simulation was carried out in a non-stationary flat model at angles to the axis of the combustion chamber of 90°, 60°, 45°, 30° and parallel to the axis, - 0°. The location of the detonation gas generator was near the nozzle section. Numerical simulation revealed that the impact of the detonation wave on the main gas flow in the nozzle causes two power factors. The first force factor is due to the reactive force when detonation products are thrown into the nozzle and on the wall of the high pressure zone where the detonation gas generator is located. The second force factor is due to the change in pressure distribution on the nozzle surface, where high pressure zone creates reflecting on it. The dependence of the relative lateral force on the injection angle of detonation products into the combustion chamber over time has been obtained. The structure of the flow according to the patterns of the velocity distribution in the nozzle during the injection of detonation products is also considered. In cases when the injec-tion is blown at 900 and 450, the release of detonation products initiates a shock wave of high intensity, which moves against the supersonic flow, retarding it. The developed scheme can be used for maneuvering the upper stage of a prospective launch vehicle to avoid its collision with elements of space debris.
Using deep cnn architectures and tensorflow for bee identification on images
Authors: Oleksandr Zhukov , Vitalii Horbenko
Published: August 2023

Problem statement. Bees are important pollinators for various plant species and are essential in maintaining our planet's biodiversity. With the decline in the number of bees worldwide, monitoring the bee hive state has become increasingly important. Pur-pose. Individual bee identification is an important task that, if performed well, will help to track the bee hive population and its health state in general. Related work. With the development of deep learning and computer vision technologies, several studies were done on their application in detecting insects like wasps, spiders, or fruit flies. Materials and methods. Photographs of bee hive frames with bees on them are being used as a da-ta source for model training. These photographs were manually annotated using Remo annotation software. This study uses five widely used deep learning architectures (Fast-er R-CNN ResNet152, CenterNet ResNet50, SSD ResNet50, Faster R-CNN Inception ResNet V2, SSD MobileNet V2) for the purpose of bee detection on test images. These models were trained on the same dataset and evaluated on the same bee image set. Re-sults and discussion. According to the confusion matrix, SSD MobileNet V2 architecture showed the best detection performance with 80% detected bees on test files, but it also had the falsest negative entries. On the other hand, Faster R-CNN ResNet152 model showed the best results in accuracy and evaluation speed, but successfully identified on-ly 61% of the bees. Conclusions. The experiment showed that state-of-the-art CNN ar-chitecture SSD MobileNet V2 is a better performer with detecting 80% and 95% accura-cy on bee images test set.
A peculiarity of solving problems of minimization of Boolean functions
Authors: Mykola Tverdostup
Published: August 2023

Minimization of Boolean functions is mandatory for the construction of logic circuits of digital automata. The result of minimization, in general, can be not one, but several equivalent images of the Boolean function with the smallest number of variables and logical operations with them. However, a possible set of images of the minimal form of a Boolean function is not always are taken i nto account when solving minimization problems. Quite often, the result of minimization results in only one image, while considering that the problem is finally solved. Of course, such a solution is far from complete, it does not provide an opportunity to choose the optimal logic scheme of the digital automaton to be created. The purpose of the work is to justify the need to find all possible representations of the minimal form of the Boolean function. The task was solved by analyzing the minimization of an arbitrary Boolean function. The minimization was carried out analytically according to the Quine algorithm and coordinate using the Veitch diagram. In both cases, matching sets of images of the minimal form of the Boolean function are obtained, regardless of the chosen method of minimization. This testifies to the correctness of the solution to the minimization problem, the purpose of which is to find a set of images of the Boolean function to ensure the possibility of choosing the optimal solution when constructing a logic circuit of a digital automaton. It has been confirmed that the correct solution to the minimization problem is a mandatory image of not one possible function, but a set of images of all possible minimal forms of the Boolean function.
Regression analysis of impulse characteristics shorted supersonic nozzle
Authors: Kateryna Ternova , Nataliya Syrotkina
Published: August 2023

When designing and testing rocket engines, an important problem is the choice of the contour of the supersonic part of the nozzle. Recently, with the development of rock-et and space technology, different contours of nozzles have appeared that meet new tasks, requirements for the density of the layout, the need to increase the momentum co-efficient, accounting for various operating conditions, etc. Therefore, the relevance of the work is determined by the need to choose the contour of the supersonic part of the nozzle to increase the impulse characteristics of the flow in the shortened nozzle. The goal of the work is to choose the optimal contour of a shortened nozzle with a bell-shaped nozzle, taking into account geometric and technological parameters. The regres-sion model of the supersonic flow in a shortened nozzle with a nozzle considered in the work was created on the basis of previously obtained simulation results in the ANSYS package. It has been found that the flow patterns in the nozzle are affected by the length of the inlet cone, the total length of the nozzle and the operating conditions of the noz-zle, i.e. inlet pressure and ambient pressure. The nature of the separation flow in the nozzle, and hence the momentum coefficient depends on the degree of expansion of the flow from the shortened nozzle, therefore it is necessary to identify the main geometric and technological parameters of the flows in the shortened nozzle with a bell-shaped tip and determine the dependence of the momentum coefficient on them. Data analysis was carried out on the basis of the STATGRAPHICS Plus program. The influence values of each adopted factor and their mutual influence on increasing the flow impulse charac-teristics in the shortened nozzle are obtained. Three-dimensional graphs of the depend-ence of the momentum coefficient on the geometric parameters, the pressure at the noz-zle inlet, and the pressure of the external environment were obtained. The formula for the dependence of the impulse coefficient on the length of the conical part, the total length of the nozzle, the pressure at the nozzle inlet and the pressure of the external space was determined. It was established that an increase in the pressure of the external space leads to an increase in the impulse characteristic at the average value of the pres-sure at the nozzle inlet. The built regression model allows you to choose the optimal contour of a shortened nozzle with a tip.
ANALYSIS OF STRENGTH OF A FORK OF THE FORKLIFT BY NUMERICAL METHODS
Authors: Strelbitskyi V.V. , Bovnegra L.V. , Pavlyshko A.V.
Published: August 2023

Forklift is an industrial power truck, commonly called forklifts or lift trucks, then usually have two forks the can be trial power truck used forklifting and transport materials. Fork-lifts, to this day, the fork strength of a forklift under load still seems to be one of the biggest issues. Fork’s related structural design and detail have a significant impact on the overall performance and reliability of a forklift. In this work, static analyses of a fork forklift were performed using Finite Element Method, on the free software FreeCAD, a multidisciplinary software application that is the result of a long-term active collaboration between develop-ers and users. Open science hardware is cheaper, easier to maintain, and more accessible to more people. In this paper, by calculating the maximum normal stress of the section, the force situation and allowable stress of the fork are analyzed. The fork is made of structural material is 40Cr steel. The output values of the static study consist in establishing the distri-bution of equivalent unitary stresses (stress state) according to the von Mises criterion. The maximum stress of the structure is 128 MPa, which is does not exceed the allowable. Then in order to enhance the structural strength of the weak part, the measures of gradually in-creasing the fillet radius of the fork root were proposed, and the radius were selected as 35mm and 45mm, the weight of the forklift load was still 0,5t. Numerical experiments have shown that by increasing the radius from 25 to 45 mm, stresses decrease by 1.1...1.15 times, which is consistent with the theory of basic mechanics that stress concentration can easily lead to fatigue failure of the structure. Both numerical calculations and visual analysis showed consistency, with stress concentrations observed at the fork neck, demonstrating the accuracy of the established finite element model.