bluuebunny/crossref_metadata_2025 huggingface dataset:
Mapping Prospective Areas of Water Resources and Monitoring Land Use/Land Cover Changes in an Arid Region Using Remote Sensing and GIS Techniques
Authors: Sun Tong , Cheng Wuqun , Abdelkareem Mohamed , Al-Arifi Nasir
Published: August 2022

Groundwater is a vital water resource for economic, agricultural, and domestic purposes in arid regions. To reduce water scarcity in arid regions, recently, remote sensing and GIS techniques have been successfully applied to predict areas with prospective water resources. Thus, this study attempted to spatially reveal groundwater potential zones (GWPZs) and to conduct change detection on the desert fringes of Wadi Asyuti, a defunct tributary of Egypt’s Nile basin in eastern Sahara. Eleven influential groundwater factors generated from remote sensing imagery, and geological, hydrological, and climatic conditions were combined after giving a weight to each factor through a GIS-based Analytical Hierarchy Process (AHP) coupled with the weighted overlay technique (WOT). The results revealed six distinctive zones with scores ranging from very low (10.59%) to excellent (3.03%). Thirty-three productive groundwater wells, Interferometry Synthetic Aperture Radar (InSAR) coherence change detection (CCD), a land use map derived from Sentinel-2, and the delineated flooding zone derived from Landsat-8 data were used to validate the delineated zones. The GWPZs indicated that 48% of the collected wells can be classified as consistent to excellent. The Normalized Difference Vegetation Index (NDVI) and image classification were applied to the multi-temporal Landsat series and Sentinel-2 along with the InSAR CCD data derived from Sentinel-1 images to reveal dramatic changes in land use/land cover (LU/LC) in terms of agricultural and other anthropogenic activities in the structurally downstream area, which is the most promising area for future developments. Overall, the integration of radar and multispectral data through the GIS technique has the ability to provide valuable information about water resources in arid regions. Thus, the tested model is a promising technique, and such information is extremely significant for the guidance of planners and decision makers in the area of sustainable development.
Pollutant Removal and Energy Recovery from Swine Wastewater Using Anaerobic Membrane Bioreactor: A Comparative Study with Up-Flow Anaerobic Sludge Blanket
Authors: Pu Yunhui , Tang Jialing , Zeng Ting , Hu Yisong , Yang Jixiang , Wang Xiaochang , Huang Jin , Abomohra Abdelfatah
Published: August 2022

Due to its high content of organics and nutrients, swine wastewater has become one of the main environment pollution sources. Exploring high-efficient technologies for swine wastewater treatment is urgent and becoming a hot topic in the recent years. The present study introduces anaerobic membrane bioreactor (AnMBR) for efficient treatment of swine wastewater, compared with up-flow anaerobic sludge blanket (UASB) as a traditional system. Pollutant removal performance, methanogenic properties, and microbial community structures were investigated in both reactors. Results showed that by intercepting particulate organics, AnMBR achieved stable and much higher chemical oxygen demand (COD) removal rate (approximately 90%) than UASB (around 60%). Due to higher methanogenic activity of anaerobic sludge, methane yield of AnMBR (0.23 L/g-COD) was higher than that of UASB. Microbial community structure analysis showed enrichment of functional bacteria that can remove refractory organic matter in the AnMBR, which promoted the organics conversion processes. In addition, obvious accumulation of acetotrophic and hydrotrophic methanogens in AnMBR system was recorded, which could broaden the organic matter degradation pathways and the methanogenesis processes, ensuring a higher methane yield. Through energy balance analysis, results concluded that the net energy recovery efficiency of AnMBR was higher than that of UASB system, indicating that applying AnMBR for livestock wastewater treatment could not only efficiently remove pollutants, but also significantly enhance the energy recovery.
Prediction of Groundwater Arsenic Hazard Employing Geostatistical Modelling for the Ganga Basin, India
Authors: Dhamija Sana , Joshi Himanshu
Published: August 2022

Elevated arsenic concentrations in groundwater in the Ganga–Brahmaputra–Meghna (GBM) river basin of India has created an alarming situation. Considering that India is one of the largest consumers of groundwater for a variety of uses such as drinking, irrigation, and industry, it is imperative to determine arsenic occurrence and hazard for sustainable groundwater management. The current study focused on the evaluation of arsenic occurrence and groundwater arsenic hazard for the Ganga basin employing Analytical Hierarchy Process (AHP) and Frequency Ratio (FR) models. Furthermore, arsenic hazard maps were prepared using a Kriging interpolation method and with overlay analysis in the GIS platform based on the available secondary datasets. Both models generated satisfactory results with minimum differences. The highest hazard likelihood has been displayed around and along the Ganges River. Most of the Uttar Pradesh and Bihar; and parts of Rajasthan, Chhattisgarh, Jharkhand, Madhya Pradesh, and eastern and western regions of West Bengal show a high arsenic hazard. More discrete results were rendered by the AHP model. Validation of arsenic hazard maps was performed through evaluating the Area Under Receiver Operating Characteristics metric (AUROC), where AUC values for both models ranged from 0.7 to 0.8. Furthermore, the final output was also validated against the primary arsenic data generated through field sampling for the districts of two states, viz Bihar (2019) and Uttar Pradesh (2021). Both models showed good accuracy in the spatial prediction of arsenic hazard.
A Coevolution Model of the Coupled Society—Water Resources—Environment Systems: An Application in a Case Study in the Yangtze River Economic Belt, China
Authors: Liu Haoyuan , Zhang Xiang , Tao Shiyong , Xiao Xi , Wu Keyi , Xia Jun
Published: August 2022

Interactions among society, water resources, and environment systems have become increasingly prominent with the progressively far-reaching impact of human activities. Therefore, this paper aims to construct a co-evolution model to establish the mutual feedback relationship among society, water resources, and environment from the perspective of socio-hydrology. Firstly, social factors such as environmental sensitivity, environmental protection awareness, and technological level are introduced to this model to describe the coevolutionary trajectory of society, water resources and environment subsystems. Then, this model is implemented in 11 provincial administrative regions in the Yangtze River Economic Belt, and the degree of coordination of their coupling is evaluated. Results show that the water-use efficiency of each provincial administrative region in the Yangtze River Economic Belt gradually increases during the forecast period. The coupling-coordinated degree of each provincial administrative region of the Yangtze River Economic Belt has greatly improved during the 14th Five-Year Plan period, reflecting that policy support has played a significant role in the coordinated development of the Yangtze River Economic Belt. The dynamic fluctuation process of environmental sensitivity effectively depicts the co-evolution process of the coupling system, which provides a reference for the subsequent exploration and cognition of the human-water coevolutionary mechanism.
The Experience and Development of the Treatment Technology of Municipal Solid Waste Leachate in China
Authors: Song Xinxin , Min Haihua , Zhao Lejun , Fu Qingming , Zheng Wei , Wang Xingjian , Ding Ximing , Liu Lingjie , Ji Min
Published: August 2022

This paper reviews the characteristics of leachate produced from municipal solid waste landfills, incineration plants, transfer stations, and food waste anaerobic fermentation plants. In addition, the development of the leachate treatment technology used in China is investigated. The development period of leachate treatment technology in China can be divided into five stages: the early 1990s with simple biological treatment, the mid-to-late 1990s with ammonia stripping + anaerobic + aerobic treatment, from 2000 to 2008 with a two-stage disc tube reverse osmosis (DT-RO) process, from 2008 to 2015 with an anaerobic + aerobic + advanced treatment process, and from 2015 until the present with a diversified and full quantitative process. Furthermore, under the requirements of ecological environmental protection and “dual carbon” development concepts, this paper advises the future development trend of Chinese municipal solid waste leachate, which will enact more scientific emission standards and local standards, become inevitable for the green ecology of the technical route, be more professional and intelligent for construction and operation, and diversify resource utilization of the treatment facilities process.
LSTM-Based Deformation Prediction Model of the Embankment Dam of the Danjiangkou Hydropower Station
Authors: Wang Shuming , Yang Bing , Chen Huimin , Fang Weihua , Yu Tiantang
Published: August 2022

The Danjiangkou hydropower station is a water source project for the middle line of the South-to-North Water Transfer Project in China. The dam is composed of riverbed concrete dam and earth rock dam on both banks, with a total length of 3442 m. Once the dam is wrecked, it will yield disastrous consequences. Therefore, it is very important to evaluate the dam safety behavior in time. Based on the long-term and short-term memory (LSTM) network, the deformation prediction models of the embankment dam of the Danjiangkou hydropower station are constructed. The models contain two LSTM layers, adopt the rectified linear unit function as the activation function and determine the super parameters of the models with Bayesian optimization algorithm. According to the settlement monitoring data of LD12ZT01 measuring point (dam crest 0 + 648) on the left bank of the embankment dam of the Danjiangkou hydropower station from July 2013 to March 2022, the LSTM and bidirectional LSTM models are constructed. In total, 80% of the monitoring data are taken as the training set data and 20% of the monitoring data are taken as the test set data. The mean absolute error, root mean square error and mean square error for the test set are 0.42978, 0.56456 and 0.31873 for partial least squares regression (PLSR), 0.35264, 0.47561 and 0.22621 for LSTM and 0.34418, 0.45400 and 0.20612 for bidirectional LSTM, respectively. The results show that the bidirectional LSTM model can obtain better deformation prediction value than the LSTM model and the PLSR. Then, the bidirectional LSTM model is used to predict the settlement value of LD16YT01 measuring point (dam crest 0 + 658) on the right bank, and the mean absolute error, root mean square error and mean square error for the test set are 0.5425, 0.66971 and 0.4520, respectively. This shows the bidirectional LSTM model can effectively predict the settlement value of the embankment dam of the Danjiangkou hydropower station.
FEATURES OF THE IMPLEMENTATION OF PROCEDURAL POWERS BY PERSONS INVESTIGATING CRIMINAL OFFENSES IN THE FORM OF INQUIRY
Authors: Humin Oleksii , Sobchuk Anton
Published: August 2022

The article analyzes the provisions of the criminal procedural legislation regarding the institute of criminal offenses introduced in Ukraine, as well as the practice of their application. With the use of general scientific and special methods of scientific knowledge, proposals are formulated for: supplementing the Criminal Procedure Code of Ukraine with provisions for the adoption of an appropriate procedural decision by an interrogating officer in case of failure to establish the composition of a criminal offense; determination of the interrogating officer as the subject of the search, as well as filing a petition for the seizure of property.

The analysis of the provisions of the criminal procedural legislation regarding the institution of criminal offenses introduced in Ukraine, the practice of their application, made it possible to draw the following conclusions.

1. The domestic legislator needs to ensure the avoidance of violations of the rights and freedoms of man and citizen by law enforcement agencies, which may be caused by shortened investigation periods, duplication of certain provisions of the Code of Criminal Procedure of the Russian Federation, the absence and vagueness of instructions regulating the procedure for investigating criminal offenses. The gaps and contradictions identified by us in the criminal procedural law provide opportunities for abuse of their powers by authorized subjects, interpreting the uncertainty of the law in favor of the prosecution.

2. In order to increase the effectiveness of the investigation of criminal offenses in the form of an inquiry, it is advisable: to supplement the Code of Criminal Procedure of Ukraine with a provision on the adoption of an appropriate procedural decision by the investigator, if, based on the results of the information carried out for entering into the Unified Register of Pre-trial Investigations of the procedural actions, it does not establish the composition of the criminal offense; the definition in the Code of Criminal Procedure of Ukraine of an interrogating officer, along with an investigator and a prosecutor, the subject of a search, as well as filing a petition for the seizure of property, primarily to seize temporarily seized property during the arrest of a person.
STUDENTS� PERCEPTION ON THE ONLINE LEARNING: A CASE STUDY OF EFL LEARNERS
Authors: Oktarini Widya
Published: August 2022

ABSTRACTThis case study aims at describing students perception especially EFL learners on the online learning during the pandemic covid 19. The data was taken from English Department students who are in the second semester which are taught by the researcher in her class. The data collection was done by using online interview by using zoom meeting in which the students enter the meeting one by one to have the interview. Based on the analysis, it revealed that according to students perception, online learning is not effective and not liked by the students. They prefer face-to-face or offline class. In details, they stated some reasons, they are: the unstable signal, cannot adjust yet with the online class, the instruction of the assignment is not clear, not effective group assignment because of online interaction, the material of online learning is not so clear. So, they hope the offline class will be done soon. The online learning tools they like the most is zoom meeting because it is almost like the face to face class.Keywords: Students perception; online learning; EFL Learners.
THE STUDENTS� PERCEPTION OF ENGLISH COURSES (THE NUTRITIONIST STUDY PROGRAM FACULTY OF HEALTH UNIVERSITAS NAHDLATUL ULAMA NUSA TENGGARA BARAT)
Authors: Ardiansyah Lalu Dwi Satria , Septiani Baiq Dewi Sukma , Saifuddin Fahimah
Published: August 2022

The ability to use English is an important ability to be achieved in the process of learning a foreign language. The Nutritionist Study Program aims to develop students' language skills both orally and written. With oral skills, students are expected to master a number of vocabulary and sentence structures and be able to speak actively; With written skills, students are expected to be able to read and understand language texts, especially those closely related to the material being studied.This research was conducted to obtain data related to the perceptions of students of Nutritionist Study Program, Faculty of Health, UNU NTB.The learning process carried out, which is divided into five parts, namely: perceptions of English for the students, related Faculty of Health, UNU NTB: the purpose of learning English language proficiency, teaching materials from the language proficiency courses, application of language proficiency teaching methodologies, lecturers of English language proficiency courses perceptions and student perceptions of evaluation techniques used by lecturers of language proficiency courses in the Nutritionist Study Program, Faculty of Health, UNU NTB.The results of this study are expected be an evaluation material for the English learning process in the UNU NTB and future curriculum development.The ability to use English is an important ability to be achieved in the process of learning a foreign language. The Nutritionist Study Program aims to develop students' language skills both orally and written. With oral skills, students are expected to master a number of vocabulary and sentence structures and be able to speak actively; With written skills, students are expected to be able to read and understand language texts, especially those closely related to the material being studied.This research was conducted to obtain data related to the perceptions of students of Nutritionist Study Program, Faculty of Health, UNU NTB. The learning process carried out, which is divided into five parts, namely: perceptions of English for the students, related Faculty of Health, UNU NTB: the purpose of learning English language proficiency, teaching materials from the language proficiency courses, application of language proficiency teaching methodologies, lecturers of English language proficiency courses perceptions and student perceptions of evaluation techniques used by lecturers of language proficiency courses in the Nutritionist Study Program, Faculty of Health, UNU NTB. The results of this study are expected be an evaluation material for the English learning process in the UNU NTB and future curriculum development.Keywords:perception; process; learning; language proficiency
Impact of Motivations in Choosing English Education Department and Academic Achievement
Authors: Nuraeningsih Nuraeningsih , Suprihadi Suprihadi
Published: August 2022

Not all graduates of English Education Department, Teacher Training and Education Faculty, Universitas Muria Kudus work as teachers or in the field of education. The objectives of this research are: 1) to explore the motivation of the students in choosing English Education Department Universitas Muria Kudus, 2) to test the significance of the difference between the academic achievements of integrative-motivated students and those of instrumental-motivated students. The design of this research is qualitative-quantitative with motivation as the independent variable and academic achievement as the dependent variable. Questionnaire was used to collect the data from 81 students as the subjects of the research. Descriptive statistical analysis was used to achieve the first objective and t-test was used to achieve the second objective. The results of the research show that: 1) the dominant motivation of the students in choosing English Education Department Universitas Muria Kudus is integrative; 2) there is a significant difference of academic achievement of the instrumental-motivated students and that of integrative-motivated students, that is, the academic achievement of the students who have integrative motivation is better than that of the students who have instrumental motivation.
DEBATE, SELF-EFFICACY, AND DECISION MAKING IN EAST JAVA ENGLISH COMPETITION
Authors: Pertiwi Piranti Astri , Ningrum Ary Setya Budhi , Rasyid Fathor
Published: August 2022

In the era of globalization, self-efficacy and decision-making are needed to complete self-quality. Many education experts believe that debate is closely correlated with self-efficacy and decision-making. Therefore, this study investigates the correlation between debate, self-efficacy and decision-making. This correlation study involved 67 students in the English Debate competition at the East-Java English Club (EJEC) 4 2020. 25 questionnaire items with Yes/No options were used to determine student debate perceptions and two Likert scale questionnaires, each consisting of 26 items for measuring decision making and 30 items to measure self-efficacy were also given to students. The Kendall's Tau Correlation ver.21 for windows demonstrates a moderate correlation between debate and decision-making (r=.436), debate with self-efficacy (r=.513), and self-efficacy and decision-making (r =,827). From these results, it can be concluded that there is a significant correlation between debate and decision making, debate with self-efficacy, and self-efficacy with decision-making. It also bringsrecommendations for further researchers to find out more about students' perspectives and debate coaches regarding the debate method to develop students' decision-making abilities and self-efficacy
ANDRAGOGICALLY ORIENTED TEACHING METHODS AND VOCATIONAL SCHOOL GRADUATE STUDENTS' TEACHING PRACTICE ACHIEVEMENT
Authors: Rismiyanto Rismiyanto , Suryani Fitri Budi
Published: August 2022

Different learner’s educational levels need different teaching method orientations. Adult and young learners are certainly treated by using different teaching method orientation. The independency of college students as adult learners in learning is still oftentimes found in low level. Both college students and lecturers still have big chance to be involved in a learning process which is not yet entirely supported by principles of independent learning.. This condition is quite contradicted with their status as adult learners who should have applied independent learning, and still experienced by the students at English Education Department of Muria Kudus University (EED MKU). The high independency of learning refers to the adult learners that should be involved in Andragogically oriented teaching methods (AOTM), while the low independency of learning refers to the young learners that should be involved in Pedagogically oriented teaching methods (POTM.) This study is aimed at comparing the effectiveness of implementing AOTM and POTM to the students graduating from vocational and non vocational high schools. This is a quantitative study with the population of 87 students joining Speaking for Instructional Purposes (SIP) classes at EED MKU. Teaching practice pre and post tests are used as the instrument of this study. The results indicate that AOTM and POTM give impact to improve the teaching practice achievement of the students both graduating from vocational and non-vocational high schools when comparing the scores of pre-tests and post-tests, but the AOTM and POTM implemented in SIP classes with students graduating from vocational schools and from non-vocational schools do not result in impact on their teaching practice. However, in a certainly different condition the implementation of AOTM and POTM might give more impact to the teaching practice achievement of the students graduating from vocational schools than those graduating from non-vocational schools
Pondok Persulukan Syekh Sulaiman Lubis al-Kholidy: Penggagas Tarekat dan Nasionalisme di Desa Hutapungkut, Mandailing Natal
Authors: Sakdiah Sakdiah , Sazali Hasan , Purwaningtyas Franindya
Published: August 2022

This article discusses the role of Sheikh Sulaiman Lubis al-Kholidy's Islamic boarding school in spreading the teachings of the Naqsyabandiyah Order and the spirit of nationalism in Hutapungkut Village, Mandailing Natal. This study uses a qualitative research method with a historical approach that links various reference sources with the theme being studied. Syekh Sulaiman Lubis al-Kholidy's hut is estimated to have been around since the mid-19th century. Its founder was Sheikh Sulaiman Lubis al-Kholidy who studied tarekat in the villages of Besilam, Langkat and Jabal Qubais, Mecca. The focus of this article is to see how the role played by this Islamic boarding school in building the spirit of nationalism of its followers. In addition, this article also wants to see what socio-political changes have resulted from the presence of this Islamic hut, especially in Hutapungku Village, Mandailing Natal Regency. The results of the research that the authors found were that, apart from being successful in spreading the teachings of the Naqsyabandiyah Order in the Mandailing Natal area, Syekh Sulaiman Lubis also succeeded in instilling the spirit of nationalism among
Masjid dan Islam: Menelisik Islam di Tebing Tinggi dari Jejak Arsitekturnya
Authors: Syahrawati Indri , Sayekti Retno , Nurhayani Nurhayani
Published: August 2022

This article discusses the Great Mosque of Nur Addin which is a long proof of the existence of the Kingdom of Padang in the area which is currently included in the administration of Tebing Tinggi City and its surroundings. This article uses historical research methods with a qualitative approach. However, the main focus of this article is to see the architecture of the Great Mosque of Nur Addin as a manifestation of the spirit of the Tebing Tinggi Islamic community at that time. The Great Mosque of Nur Addin was founded in 1861 AD by the King of Padang named Tengku Haji Muhammad Nurdin who was also the founder of the City of Tebing Tinggi. This mosque was built very majestically and beautifully as evidence of the prosperity of the Kingdom of Padang. This mosque from the past until now is still the pride of the people of Tebing Tinggi and its surroundings. The construction of such a magnificent mosque cannot be separated from the profits obtained by the Padang Kingdom from the land concessions with foreign plantation entrepreneurs. In addition, the religious function of this mosque is still maintained. What's unique about this mosque is that, every month of Ramadan, the mosque management continues to provide meat porridge as an iftar dish, which is still a tradition that has been preserved to this day.
Makam Datuk Tualang Poso: Sejarah dan Pemeliharaannya
Authors: Fajar Riki , Achiriah Achiriah , Muchsin Kasron
Published: August 2022

This article discusses the history of Datuk Tualang Poso's tomb and its maintenance in Amplas Village, Percut Sei Tuan District, Deli Serdang Regency. The method used in this study is a qualitative descriptive analysis method using a historical approach. The data in this study were obtained through observation, interviews, literature study and documentation. The results showed that the tomb of Datuk Tualang Poso had existed since the 17th century. Datuk Tualang Poso was the first cleric sent by the Aru Sultanate to spread Islam in Amplas Village. The people of Amplas Village consider the tomb of Datuk Tualang Poso to be a sacred and sacred place. Until now the tomb of Datuk Tualang Poso is still solid and intact. The local community strives to continue to maintain and preserve the tomb as a form and form of respect for Datuk Tualang Poso for his role in spreading Islam while he was alive.
Síndrome de Down: bases genéticas e principais alterações
Authors: de Oliveira Danilo Eugênio Guimarães , De Almeida Neto Alfredo Borges , Ros Guilherme Henrique , Borges Juliana Julien Salvarani , Silva Marcelo Paiva , Carpaneda Jéssica de Medeiros , Couto Laressa Brunna , Yacoub Brenda Seabra
Published: August 2022

A Síndrome de Down foi relatada inicialmente pelo médico John Langdon em meados de 1866 mediante semelhanças físicas observadas em crianças que apresentavam atraso mental no qual eram designadas como situação de “mongolismo” para que fosse possível a definição do conjunto de manifestações que estavam sendo observadas. Compreende-se que o entendimento das bases fisiopatológicas da SD é de suma importância tendo em vista que tal conhecimento será capaz de proporcionar novas terapêuticas farmacológicas e não farmacológicas específicas para os indivíduos com a SD. Por certo, associado a fatores genéticos, os fatores epigenéticos, como interações celulares, também são responsáveis pela estruturação do fenótipo de pacientes com SD permitindo, portanto, a verificação de diferentes alterações como complicações congênitas e também acometimento audível, visual e cardíaco.
Choosing the optimal environment for visual development of a graphical user interface
Authors: Spirintsev V.
Published: August 2022

Adobe Experience Design, Sketch, Figma are the most common visual GUI development environments. In this paper, a comparative analysis of these most popular tools is carried out in accordance with the specified criteria. Choosing the right visual development environment allows to create the most accurate, realistic interface prototype, as well as increase the efficiency of the project.
Investigation of dynamic processes in the hydraulic system of clamping the staffs of the segment unwinder of the unit of aggregation of rolls pipe welding machine 20-114
Authors: Mazur I. , Shcherbinin M.
Published: August 2022

In the technological line for the production of small diameter pipes used segment un-winder staffs with a cantilever drum and additional support. The experience of its operation has shown that one of its main shortcomings is the unsatisfactory operation of the hydraulic system clamping staffs. In the hydraulic clamping system of the staffs there are increased dynamic loads, which lead to the failure of components and elements of the hydraulic system. The layout of the hydraulic clamping system of the headquarters is made for design and technological rea-sons, without taking into account the influence of pipeline lengths on the nature of dynamic processes in the hydraulic system. In addition, the hydraulic system uses spool hydrodistributors with electro-hydraulic control, the operation time of which is practically not subject to regulation. Based on the analysis of known mathematical models for the study of dynamic processes in hydraulic systems, it was concluded that as a mathematical model that takes into account the design and operation of the hydraulic clamping system staffs finite-difference method in a sys-tem of ordinary differential equations with boundary conditions described by algebraic equations. A basic dynamic model has been created, which allows to analyze with high relia-bility the behavior of the hydraulic system of the clamping mechanism of the staff in the segment unwinder of the rolls, which is exposed to different nature in a wide range of mode parameters. Simulink MATLAB software environment was used to effectively solve this problem. During the implementation of the mathematical model, a study of the modes of operation of the hydraulic system of the clamping mechanism of the staff was performed. It was found that at the end of the working and reverse strokes of the clamping mechanism of the roll in the end posi-tions there are dynamic loads in the hydraulic system that reach the maximum allowable values. In addition, it was found that during the acceleration of the piston of the hydraulic cylinder during operation and reverse, although there are no dangerous loads, but there are rapid fluctuations in pressure in the cavities of the hydraulic cylinder. Theoretical studies of the modes of operation of the hydraulic clamping system of the staff in the segment unwinder with different operating times of the control valve. As a result of the study of transients in the unwinding hydraulic system with different operating times of the hydraulic distributor, its ra-tional operating time was recommended, which is 0.20 seconds when opening and 0.15 sec-onds when closing.
On practical aspects of using of the frame-based sentence patterns in integrative computer-aided language learning system
Authors: Lytvynov O. , Lytvynov M.
Published: August 2022

The given work is devoted to resolution of the problems appeared during the attempt to build an integrative system using frame-based patterns. The main problems resolved in the work are as follows. Words reordering, effective error handling, general rules of transformation, effective scenario description.
On transactional business logic design
Authors: Lytvynov O.
Published: August 2022

The given work is devoted to the task of transactional business logic design. Additional layer responsible for transaction processing is introduced to make the architecture of the system more flexible and robust, testable and maintainable.
Efficiency of fragmented frames transmission in IEEE 802.11 copmuter networks
Authors: Khandetskyi V. , Sivtsov V.
Published: August 2022

In an analytical form, the dependence of the MAC-efficiency of frames transmission on the coefficient of their fragmentation is obtained, taking into account retransmissions of damaged frames, the number of which changes in accordance with the noise level. When the noise intensity is high, the dependence of transmission efficiency on the fragmentation factor has the extreme character.
Complex analysis of the influence of impurity and alloying elements on the toughness of steels for the manufacture of railway axles
Authors: Babachenko O. , Togobytska D. , Balakhanova T. , Kononenko G.
Published: August 2022

The paper presents and summarizes the results of statistical analysis of industrial data on chemical composition and mechanical properties of more than 1,500 samples taken from rough railway axles made of steel grades OS and EA1N with different degrees of deformation. The analysis was performed using the parametric Student's t-test, which allows to assess the statistical significance of differences between the compared values, namely, the greater the value of the t-test, the more statistically significant differences between the compared values. A significant reserve for improving the structure and properties of axial steel is the adjustment of the chemical composition, even within the vintage composition, which will minimize the cost of additional heat treatment of steel in the manufacture of railway axles. The difference between the chemical composition of steel for railway axles and the level of impact strength, in particular manganese and sulfur, has been determined. Manganese, although a strengthening element, promotes the growth of austenite grains and enhances carbon sequestration, which leads to uneven distribution of structural components of ferrite and perlite, especially with increasing its amount and insufficient deformation. This is due to the positive effect of sulfur on toughness. Although sulfur is an element that significantly reduces the properties of steel, but in this case, its content is likely to reduce the liquation of manganese. As the temperature in the austenitic region decreases, Mn is concentrated more in the nonmetallic MnS inclusion, thereby reducing its concentration around the inclusion. The necessity of applying a greater degree of deformation of the original continuously cast steel billets of EA1N grade and the implementation of measures that will have a positive effect on the reduction of dendritic segregation is shown. The significant influence of steel production technology for railway axles of close chemical composition is emphasized.
Analysis of a computer model of the behavior of a thin plate immersed in a liquid
Authors: Dmytriieva I. , Stovpchenko I.
Published: August 2022

Modeling the oscillation of a steel plate in water under the action of loads to assess the safety of the structure is an urgent task of modern times in the design of structures. The aim of this work was to study the behavior of a plate immersed in a fluid that makes forced oscillations under the action of an applied load; the mechanism of behavior of this interaction and the determination of the connected masses of the fluid. Knowledge of the connected masses helps to assess the effect of the liquid. In this work, the oscillations of a steel plate in water under the action of two types of loads were studied. For the harmonic analysis of the oscillations of the plate, our own frequency response was constructed, which was compared with the frequency response acquired by the method of solving a series of FSI problems. From the comparison of the obtained frequency response it is concluded that it is possible to use harmonic analysis to study the stress-strain state of the plate during its oscillations. Since FSI problems are quite resource-intensive due to their nature, solving a number of such problems about plate oscillations in a fluid under various loads to study the stress-strain state of an oscillatory system is not a very convenient method. The question arises as to whether it is possible to avoid solving FSI problems and to find a simpler way to solve the problems of vibration of structures in a fluid. Since the estimation of the attached water masses of the plate is known, it can be assumed that this attached water mass is distributed around the plate evenly and in view of this fact we can perform a harmonic analysis. Due to the viscosity, water dampens the amplitude of free oscillations of the plate. Thus, in order to be able to compare the results of a series of FSI and harmonic analysis problems, the latter must be modeled taking into account the damping in the model. The method of harmonic analysis with the addition of the attached mass of water can be used at low oscillation frequencies. At all other oscillation frequencies it is not recommended to use the method of harmonic analysis taking into account the connected mass of water.
Classification of chatbots
Authors: Trofymenko O. , Prokop Yu. , Zadereyko O. , Loginova N.
Published: August 2022

Today, chatbots are a hot topic of numerous scientific studies and a promising direction for the near future. With the invention of chatbots, which are an important area in the field of artificial intelligence and natural language processing, organizations have become more involved in performing communication-oriented work without any human intervention. Chatbots build relationships, answer questions and promote better understanding among employees of the organization, taking into account relevant issues, influence the decision-making process in the organization. Chatbots are embedded everywhere on websites, in various instant messaging chats, or on other forms of communication platforms. The current state and preconditions of demand for chatbots are considered in the work. The relevance of the use of chatbots for human interaction and the virtual environment is substantiated. The spheres of application of chatbots are considered, it is substantiated that chatbots are one of the most perspective directions of web interaction with users. This is due, firstly, to the active use of messengers, and secondly, the development of artificial intelligence technologies. In the long run, chatbots will help minimize many routine processes but are not an alternative to humans. A chatbot is a specific virtual interlocutor that can perform a variety of functions, depending on the scope. There are different types of chatbots and different visions of how to classify them. The study analyzes the scientific works of foreign and domestic researchers, which offers different approaches to the classification of chatbots. The detailed multifactor classification of chatbots for a clear understanding of essence, approaches to creation, advantages, and disadvantages of chatbots according to this or that attributes is formed in the work. Research and analysis of the features of modern chatbots allowed to divide chatbot programs into seven criteria: purpose; location; type of interface; the number of users; a form of access; algorithm; functional. Each of these categories is divided into groups and subgroups on different grounds. Possible examples of chatbots of the corresponding categories are given.
Application of the method of structural-parametric identification to determine the mathematical model of a multidimensional object with distributed parameters and delay
Authors: Fedotova M. , Skrynnik I. , Berezyuk І. , Trushakov D.
Published: August 2022

Drying is one of the most responsible and energy-intensive post-harvest grain processing operations. The constant rise in heat prices has led to the search for new designs of grain dryers, or improvements to existing ones. Studies of well-known scientists such as Romankov, Rezchikov, Rashkovskaya have proven the potential effectiveness of using a fluidized bed for drying grain. The degree to which this drying efficiency approaches the potential is determined by how much the change in the actual humidity of the material during drying approaches the theoretical drying curve at the same resource consumption and the same initial state of the material to be dried. Taking into account the provisions of the theory of optimal control indicates that max-imizing the accuracy of stabilization of a given value of the height of the fluidized bed should be achieved by developing an optimal multidimensional stabilization system of the specified height. The basis for solving the first of these is the study of the design of a fluidized bed grain dryer. The decomposition of the grain dryer allows to present it in the form of a set of multidi-mensional objects with pure delay. The size of this set is determined by the number of cascades, and the dynamic characteristics of its elements depend on the distance of the cascade to the gate Δ. Automation of control and management of processes of processing and storage of grain opens wide opportunities for increase of efficiency of use, increase of productivity of current lines, further reduction of labor costs and improvement of quality of processing of grain. If today most of the known dryers have their own mathematical model, this fluidized bed dryer is new, incompletely studied and therefore needs its own mathematical description in order to develop a system of automatic control of its parameters. Therefore, this paper shows the practical application of the technique of identification of signals "input-output" of the dryer for the dispersed material of the cascade type. According to the spectral and mutual spectral densities of the signals, using the technology of structural-parametric identification, a matrix of transfer functions of the dryer was found, which is a multidimensional dynamic object with distributed parameters with delay, which is affected by various perturbing factors.
Simulation of the SiGe use effi-ciency for the production of high-voltage thyristors
Authors: Bytkin S. , Krytskaja T.
Published: August 2022

Power semiconductor devices often subjected to appreciable terrestrial atmospheric neutron flows. For the improvement of their radiation hardness, the use of silicon doped with Ge (SiGe) was proposed. The stability of last is much higher in comparison with convenient type silicon. Earlier received results confirmed effectiveness of isovalent doping of silicon with germanium at radiation tests of low power (current approx. 100 mA) discrete devices. Power thyristors Т122-25 are used for the transformation and regulation of AC and DC current up to 25А, frequency up to 500 Гц in the circuits with voltage 100 – 1600V (1-16 class). In the data sheets directly indicated that these devices are not suitable for operating in the conditions of ionizing radiation. Therefore, the main practically important mission of the article was the confirmation the technological efficiency of SiGe use, or, in other words, possibility of radiation hard material use for high voltage power devices technology. The purpose of the present work was the modeling of the experimental findings for the informed choice of Ge concentration for manufacturing of high voltage thyristors Т122. The data concern the workable general-purpose power thyristors Т122 type yield, manufactured in accordance with the identical technology, based on CZ-Si и CZ-Si. At SiGe implementation in the technology of power semiconductors was observed no monotonic change of the thyristors gain share for devices of high (10, 11, 12) ranges (classes), the value of pulse recurring voltage in off-state is 1000, 1100 and 1200 V. Simulation of the experimental results was performed in MathCAD. The concentration of Ge, suitable for the manufacture of high-voltage thyristors, is in the range 2 ·1019 - 1·1020 cm-3, i.e. in the linear region of dependence. Previously, the authors have experimentally shown the possibility and mechanism of increasing the radiation resistance of SiGe with a concentration of Ge 5·1019 cm-3. It is allowed to admit the possibility of reaching the radiation resistance of high-voltage power discrete thyristors when tested with γ-quanta in the dose range up to ≅ 3·106 mSv.
Using the "minimum risk" method in the technical diagnosis of metallurgical equipment
Authors: Hrechanyi O. , Vasilchenko T. , Vlasov A. , Fedorenko S. , Syniavskyi D. , Tsehelnyi Y.
Published: August 2022

The difficult operating conditions of metallurgical equipment due to dynamic loads require special attention when designing components in the field of reliability and fail-free operation. In order to increase the reliability and durability of the spindle drive unit of the rolling stand of the hot rolling mill "1680", it is proposed to switch from "oil mist" type lubrication systems to "oil-air" type systems for bronze liners and bearings of the balancing mechanism. The oil-air lubrication principle has undeniable advantages in terms of component lubrication, flow distribution, and provides a volumetric flow of oil by injecting air into each bearing of the equipment, guaranteeing an accurate volume at each lubrication point, regardless of bearing back pressure, atmospheric pressure, temperature and oil viscosity . In order to optimize decision-making when designing new components and parts of metallurgical equipment, the vector of making reliable design decisions is increasingly shifting towards mathematical modeling of production processes and situations that arise during the performance of technological operations. It has been established that in order to determine the permissible value of the content of wear products in the form of metal shavings, one can use the general theory of recognition, which is an important section of technical cybernetics and deals with the recognition of images of any nature, namely, the "minimal risk" method. Recognition algorithms are partly based on diagnostic models that establish a connection between the state of a technical system and diagnostic signals coming from these systems. The performed calculations make it possible to accurately establish the limiting values of iron-containing impurities in the working fluid of the "oil-air" lubrication system and indicate that if the limit value x0 = 11 is exceeded, that is, if the content of iron-containing impurities in the working fluid is more than 11 g per 100 cm3, the object should be stopped for inspection and the working fluid should be cleaned by filtration. The possibility of determining the permissible value of the content of wear products in the form of metal shavings in "oil-air" lubrication systems using the general theory of recognition, namely the "minimal risks" method, which simplifies the process of setting the date of its cleaning by filtration, without burdening it with especially cumbersome formulas and calculations.
Study of the combined variant of determination of attacks using neural network technologies
Authors: Pakhomova V. , Vydish A.
Published: August 2022

The modern world is impossible to imagine without computer networks: both local and global; therefore, the issue of network security is becoming increasingly topical. Currently, methods of detecting attacks can be strengthened by using neural networks, which confirms the relevance of the topic. The aim of the study is a comparative analysis of the quality parameters of network attacks using a combined variant consisting of different neural networks. As research methods used: neural network; multilayer perceptron; Kohonen's self-organizing map. The software implementation of the Kohonen self-organizing map is carried out in Python with a wide range of modern standard tools, creation of a multilayer perceptron and a fuzzy network - using Neural Network Toolbox packages, and Fuzzy Logic Toolbox system MatLAB. On the created neural networks separately and on their combined variant researches of parameters of quality of definition of network attacks are carried out. It was determined that the error of the first kind was 11%, 4%, 10% and 0%, the error of the second kind - 7%, 6%, 9% and 6% on the fuzzy network, multilayer perceptron, self-organizing Kohonen map and their combined version, respectively, which proves the feasibility of using the combined option.