ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference最新文献

{"title":"INVESTIGATION OF THE STRUCTURE OF ALSI25CU4CR AND ALSI25CU5CR ALLOYS","authors":"B. Dochev, D. Dimova, Mihail Zagorski, P. Kasabov, Georgiya Kamburova","doi":"10.17770/etr2023vol3.7181","DOIUrl":"https://doi.org/10.17770/etr2023vol3.7181","url":null,"abstract":"The hypereutectic aluminium-silicon alloys AlSi25Cu4Cr and AlSi25Cu5Cr are heat treated T5, T6 and T7. The quenching of the alloys was carried out under the same conditions. Artificial aging at T5 was carried out at a temperature of 180º C for 2, 4 and 6h, and at T6 at 180º C for 8, 10, 12 and 14h. The artificial aging of the studied compositions at T7 was carried out at a temperature of 370º C for 20, 40 and 60 min. The influence of heat treatment on the size, shape and distribution of primary and eutectic silicon crystals in the alloy structure was investigated. It was established that the proposed heat treatment regimes do not lead to a significant change in the shape and size of the primary silicon crystals, but contribute to their uniform distribution in the structure of the studied alloys. Rounding of the silicon crystals in the composition of the eutectic of the investigated alloys was observed.","PeriodicalId":332103,"journal":{"name":"ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130475564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SOME WI-FI ACCESS POINTS IN THE CITY OF SOFIA","authors":"Kaloyan Kolev, Yordan Shterev","doi":"10.17770/etr2023vol2.7205","DOIUrl":"https://doi.org/10.17770/etr2023vol2.7205","url":null,"abstract":"The purpose of this article is to present the results of a study of the number and type of Wi-Fi access points using applications for the collection, processing and analysis of data based on a sample collected in different areas and places with a significant concentration of people in a city Sofia, Bulgaria. Data on the number and type of access points were obtained by measurements taken at the respective locations. User equipment connects to different Wi-Fi access points located in different places in the city that are accessible. Data was collected for wireless access points that are fourth and fifth generation. Different generations in wireless networks have corresponding download and upload speeds and frequencies. In the article, the results are grouped and analyzed according to different characteristics. ","PeriodicalId":332103,"journal":{"name":"ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133748140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PHYSIOLOGICAL RESPONSE OF SOME WHEAT CULTIVARS TO THERMAL STRESS","authors":"Tatjana Dunaiska, A. Batjuka, A. Petjukevics, N. Škute","doi":"10.17770/etr2023vol1.7298","DOIUrl":"https://doi.org/10.17770/etr2023vol1.7298","url":null,"abstract":"Plants are exposed during their development to the influence of various stressful factors, both abiotic and biotic in natural conditions of habitation. Thermal stress is likely the most important abiotic factor that adversely affects plant growth and development. Wheat (Triticum aestivum L.) is one of the most economically important crops worldwide. In this study, three Latvian winter wheat cultivars ´Creator´, ´Galerist´, and ´Skagen´ were used as a research model that were subjected to short-term high temperature (42°C, 1 h) and analyzed for the following growth parameters (maximum length of root, length of first leaf and coleoptile as well as seedlings weight). In general, short-term high temperature caused an insignificant reduction in almost all growth criteria like the first leaf growth, coleoptile growth, seedlings weight, and maximal root growth in wheat cultivars ´Skagen´ and ´Galerist´ at the 6th day of development.  Furthermore, almost all growth characteristics were stimulated by short-term high temperature in the wheat cultivar ´Creator´. A slowing of the growth processes under the influence of short-term thermal stress revealed varietal specificity on the impact of this stressor on the morphological structure of cereal, which makes it possible to diagnose the stress tolerance of wheat cultivars. ","PeriodicalId":332103,"journal":{"name":"ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132488345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THE EFFICIENCY OF USING ALTERNATIVE FERTILIZERS IN POTATO PLANTATIONS","authors":"A. Adamovics, L. Poiša, Lydiia Antypova","doi":"10.17770/etr2023vol1.7247","DOIUrl":"https://doi.org/10.17770/etr2023vol1.7247","url":null,"abstract":"Field trials with the two potato variety were carried out in sod stagnogley soil. Soil agrochemical parameters: pHKCl 6.7 organic matter (OV) content in soil 2.3%, phosphorus (P2O5) content - 149 mg kg-1 and potassium (K2O) content - 200 mg kg-1 in soil. Potato plantations were created using different variants of fertilizer mix with pig (from SIA “Latvi Dan Agro”) and cattle (from SIA “Ziedi JP”) manure digestate and wood ash (from SIA“Gren Jelgava”) in different ratio (digestate :wood ash ratio used: 4:1and 3:1). The rates of innovative mixed fertilizer for pig and cattle manure digestates for potatoes were 15 and 30 t ha-1. Both norms for digestate manure from pure pigs and cattle were used as control options. The potato production norm was 3.0 t ha-1. The placement of the variants in the trial was randomized, in triplicate. In the study, the two types of fertilizer had different effects on potato tuber yield. Using mixtures of pig manure digestate and wood ash in different ratios, the average yield was 34.2 t ha-1, but using mixtures of cattle manure digestate and wood ash, the average yield was 27.8 t ha-1. In the studied variants, its content in potato dry matter varied in the range of 9.15-11.42%. The amount of dry matter affects the culinary properties of the tubers. The application of fertilizer mixtures increased the dry matter content by an average of 1.7–2.7%. Fertilizer variants with higher tuber yield or higher starch content provided the highest starch yield.  In general, the use of mixtures of wood ash and biogas digestate to fertilize crops and improve soil fertility can be an efficient way to process both products and can be an environmentally friendly alternative to fertilizers. The objective of the research was to study the influence of digestate and wood ash mixtures fertilizer rates on potato productivity and quality. ","PeriodicalId":332103,"journal":{"name":"ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115679971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TEACHING ENGLISH TO POSTGRADUATE STUDENTS IN A TECHNICAL UNIVERSITY DIGITAL ENVIRONMENT","authors":"N. Saienko, G. Sozykina, A. Ptushka, O. Yazlovytska, A. Prudnikova","doi":"10.17770/etr2023vol2.7292","DOIUrl":"https://doi.org/10.17770/etr2023vol2.7292","url":null,"abstract":"One of the main tasks of training postgraduate students in graduate school is to develop competences necessary to present and discuss the results of their research work in a foreign language in oral and written forms, as well as to fully understand foreign language scientific texts in their specialty.In the last decades international scientific communication has shifted from a plural use of several languages to a clear dominance of English. The shift implies that an ever-increasing number of scientists whose mother tongue is not English have moved to English for publication and conference participation.A literature analysis and own experience revealed such problems of postgraduate students’ training in foreign languages as heterogeneity of the contingent with an unequal and often low initial level of language proficiency, a limited number of hours allocated for practical classes in English; a low level of self-directedness in language learning, a lack of elementary knowledge of the scientific discourse.In an attempt to solve these problems, the Department of Foreign Languages staff at Kharkiv National Automobile and Highway University have developed and implemented a training course for postgraduate students in two, traditional paper and online, versions, the latter designed with the use of such a modern approach in language didactics as audiovisual translation appropriate for self-learning and flipped classroom activities. The course comprised three modules: scientific reading, academic speaking and academic writing. Besides, postgraduates with the elementary level of English were offered a grammar course covering all the basic grammatical topics necessary to formulate correct written and oral utterances. The effects of teaching English with the use of videos with recorded parallel bilingual vocabulary and texts placed on an online platform were compared to the results of the traditional teaching with the use of the paper copy. The research was carried out in the 2021-2022 academic year and aimed, firstly, to compare language skills of two groups of learners: those who studied the course with the use of audiovisual technology (the experimental group) with those who studied in the traditional mode (the control group); and, secondly, to reveal how the level of self-directedness changed in the process of the course study in both groups. The study involved a mixed approach of quantitative and qualitative methods to diagnose the level of learners' language competence and self-directedness. Our results indicate that the use of audiovisual translation in teaching foreign languages improves students’ language skills and increases autonomy in studies. It can be concluded that utilizing audiovisual translation due to auditory and visual support and opportunity for learners to study at their own pace has a significant impact on postgraduate students’ language proficiency though this approach requires further research and wider implementation.","PeriodicalId":332103,"journal":{"name":"ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124731375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RESEARCH INTO THE ACCURACY OF HOLES IN 3D PRINTING USING TAGUCHI METHOD","authors":"Valeri Bakardzhiev, Sabin Sabev, Konstantin Chukalov, P. Kasabov","doi":"10.17770/etr2023vol3.7254","DOIUrl":"https://doi.org/10.17770/etr2023vol3.7254","url":null,"abstract":"The article discusses the impact of two factors on the accuracy of the hole sizes - print speed and layer thickness in 3D printing. Nine samples of the ABS polymer were printed by using a 3D printer, then the impact of both of the factors on the accuracy of 3D printing of the holes was evaluated. Taguchi's method was applied with the help of DOE in Minitab to evaluate the impact of the two factors.","PeriodicalId":332103,"journal":{"name":"ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115286302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CHARACTERIZATION OF THE ZOOPLANKTON COMMUNITY OF A SHALLOW LAKE WITH ORGANIC-RICH SEDIMENT","authors":"R. Tretjakova, Aija Brakovska, Jana Paidere","doi":"10.17770/etr2023vol1.7253","DOIUrl":"https://doi.org/10.17770/etr2023vol1.7253","url":null,"abstract":"In this research, the ecological quality of the lake Vēveru (Latvia, Rēzekne district) according to zooplankton was investigated. Lake Vēveru has a large sapropel deposit with rich reserves of sapropel. Removal of sapropel requires organization of spatio-temporal monitoring to control the state or disturbance of the existing ecosystems in the long term. Zooplankton samples were collected and analyzed using standard methods in the open pelagic and littoral zones of the lake in different seasons. Quantitative samples of zooplankton in each sampling site were collected from the surface water layer at the depth of 0.5 m by filtering 100 l of water through an Apstein-type plankton net (64 µ). Biodiversity of zooplankton taxa in Lake Vēveru shows that the food base of juvenile and planktophagous fish is sufficient. The Shannon index according to the diversity of zooplankton taxa ranges from 0.84 to 1.52 by abundance, from 1.52 to 2.21 by biomass.","PeriodicalId":332103,"journal":{"name":"ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116227060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RAPID PROTOTYPING OF PEAR DETECTION NEURAL NETWORK WITH YOLO ARCHITECTURE IN PHOTOGRAPHS","authors":"S. Kodors, Marks Sondors, G. Lācis, E. Rubauskis, I. Apeināns, Imants Zarembo","doi":"10.17770/etr2023vol1.7293","DOIUrl":"https://doi.org/10.17770/etr2023vol1.7293","url":null,"abstract":"Fruit yield estimation and forecasting are essential processes for data-based decision-making in agribusiness to optimise fruit-growing and marketing operations. The yield forecasting is based on the application of historical data, which was collected in the result of periodic yield estimation. Meanwhile, the object detection methods and regression models are applied to calculate yield per tree. The application of powerful neural network architectures for rapid prototyping is a common approach of modern artificial intelligence engineering. Meanwhile, the most popular object detection solution is YOLO architecture. Our project team collected the dataset of fruiting pear tree photographs (Pear640) and trained YOLOv5m with mAP@0.5 95% and mAP@0.5:0.95 56%. The obtained results were compared with other YOLOv5-7.0 and YOLOv7 models and similar studies.","PeriodicalId":332103,"journal":{"name":"ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122609459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"FEATURES OF COLOR LASER MARKING ON METALS","authors":"N. Dolchinkov, Teodor Petrov, Georgi Petrov, Christian Tolev, Emanuil Dimitrov","doi":"10.17770/etr2023vol3.7222","DOIUrl":"https://doi.org/10.17770/etr2023vol3.7222","url":null,"abstract":"In the research carried out at the Rezekne Academy of Technology, the technology for color laser marking on chromium-nickel base and other metal bases was used in industrial production from the point of view of the repeatability and stability of the produced color markings. The study and research was done during the Erasmus internship by the authors at the Academy of Technology in Rezekne, Latvia. For this purpose, an AISI 304 color palette consisting of fifteen colors was developed and implemented. After the practical experiments, the dependence of the obtained colors on the various parameters of the laser processing was analyzed. The resulting colors were then tested using optical, scanning electron and atomic force microscopy, and the configuration of the oxide films was determined by Raman spectroscopy. The resulting colors are of appropriate uniformity, brightness and cover almost all spectral zones, and the resulting colors are of many times better quality than other metallic bases. A color standardization and palette repeatability test was also performed by evaluating the reflectance spectra of the formed colors. The color palette demonstrated high repeatability for all but one particular color. In parallel, the stability of the color markings was studied in terms of environmental, mechanical and chemical resistance. The resulting colors show high resistance to most environmental conditions; however, exposure to very high temperatures and extreme humidity (100 °C, 90%) and to low temperatures and extreme humidity (-40 °C, 90%) results in degradation of several colors. Colored brands show high hardness and excellent mechanical resistance to external influences and exceptional resistance to various chemicals, except for acid solutions and salts. ","PeriodicalId":332103,"journal":{"name":"ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125324772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"WETLAND CHANGE DETECTION USING SENTINEL-2 IN THE PART OF LATVIA","authors":"A. Skromulis, Juris Breidaks, Mārtiņš Puķītis","doi":"10.17770/etr2023vol1.7305","DOIUrl":"https://doi.org/10.17770/etr2023vol1.7305","url":null,"abstract":"In the article, the possible impact of changes on wetland were analysed by the semi-supervised classification method of statistical analysis. The Sentinel-2 raw data between two different seasons are combined together. The data preparation is shortly described in the article. Data is clustered with unsupervised method. The article describes a supervised method – how data credibility and classification can be estimated if its reference is poor quality.  ","PeriodicalId":332103,"journal":{"name":"ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125920873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}