Pub Date : 2022-06-30DOI: 10.1109/eeae53789.2022.9831331
Yulian Moskov
When solving complex model problems, taking into account the diversity of the two main engineering problems from high-tech practice, contradictory and not always applicable and workable results are obtained - mathematical models (MM) of marine diesel engines (MDE). If they are precise in terms of transients, they are difficult to implement in real time. In case of insensitivity in the transient modes, they are inaccurate in a large range for the purposes of automation and technical operation. Adequacy analysis and subsequent adaptation is a possible approach with good results in the presence of an appropriate workable model.
{"title":"Adequacy Analysis and Adaptation of the Mathematical Model for SSDE Management","authors":"Yulian Moskov","doi":"10.1109/eeae53789.2022.9831331","DOIUrl":"https://doi.org/10.1109/eeae53789.2022.9831331","url":null,"abstract":"When solving complex model problems, taking into account the diversity of the two main engineering problems from high-tech practice, contradictory and not always applicable and workable results are obtained - mathematical models (MM) of marine diesel engines (MDE). If they are precise in terms of transients, they are difficult to implement in real time. In case of insensitivity in the transient modes, they are inaccurate in a large range for the purposes of automation and technical operation. Adequacy analysis and subsequent adaptation is a possible approach with good results in the presence of an appropriate workable model.","PeriodicalId":441906,"journal":{"name":"2022 8th International Conference on Energy Efficiency and Agricultural Engineering (EE&AE)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130099672","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}
Pub Date : 2022-06-30DOI: 10.1109/eeae53789.2022.9831394
Zdravko Gandov, Sabahtin Karaibryam, V. Gandova, I. Petrova
The surface properties of three types essential oils (Pinus sylvestris, Juniperus communis and Oreganum herachoticum) were investigated as application of adjuvants. The surface tension was measured in both pure oils and solutions with concentrations: 0.001, 0.01 and 0.1 % v/v at different temperatures: 10, 25, 30, 35 and 400C. After comparison of surface tension between three oil some low values exhibit Pinus sylvestris (33.61±0.21 to 16.13±0.11 mN.m-1) following of Juniperus communis (38.25±0.17 to 20.91±0.07 mN.m-1) and Oreganum herachoticum (41.93±0.15 to 25.75±0.12 mN.m-1). This results confirm that these essential oils can be used as adjuvants in agriculture.
{"title":"Temperature dependence of surface tension in three eseential oils with application as adjuvants in agriculture","authors":"Zdravko Gandov, Sabahtin Karaibryam, V. Gandova, I. Petrova","doi":"10.1109/eeae53789.2022.9831394","DOIUrl":"https://doi.org/10.1109/eeae53789.2022.9831394","url":null,"abstract":"The surface properties of three types essential oils (Pinus sylvestris, Juniperus communis and Oreganum herachoticum) were investigated as application of adjuvants. The surface tension was measured in both pure oils and solutions with concentrations: 0.001, 0.01 and 0.1 % v/v at different temperatures: 10, 25, 30, 35 and 400C. After comparison of surface tension between three oil some low values exhibit Pinus sylvestris (33.61±0.21 to 16.13±0.11 mN.m-1) following of Juniperus communis (38.25±0.17 to 20.91±0.07 mN.m-1) and Oreganum herachoticum (41.93±0.15 to 25.75±0.12 mN.m-1). This results confirm that these essential oils can be used as adjuvants in agriculture.","PeriodicalId":441906,"journal":{"name":"2022 8th International Conference on Energy Efficiency and Agricultural Engineering (EE&AE)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130203607","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}
Pub Date : 2022-06-30DOI: 10.1109/eeae53789.2022.9831214
Tsvetozar Georgiev
The report describes a study of the opinion of students from the University of Ruse on their use of mobile learning before and during the COVID-19 pandemic. The research uses the survey methodology and for this purpose an online questionnaire was developed. A total number of 469 students from four academic years were surveyed - two before COVID-19 and two during the pandemic. Of the total number of surveyed students, 143 are in the academic year 2021-2022 and 133 are in the academic year 2020-2021, when most of the education was online. 72 are in the academic year 2019-2020 and 121 are in the academic year 2018-2019. An analysis and comparison of the results of these three academic years was performed. Relevant conclusions about the impact of COVID-19 on the use of mobile learning are made.
{"title":"M-Learning - Before and During COVID-19","authors":"Tsvetozar Georgiev","doi":"10.1109/eeae53789.2022.9831214","DOIUrl":"https://doi.org/10.1109/eeae53789.2022.9831214","url":null,"abstract":"The report describes a study of the opinion of students from the University of Ruse on their use of mobile learning before and during the COVID-19 pandemic. The research uses the survey methodology and for this purpose an online questionnaire was developed. A total number of 469 students from four academic years were surveyed - two before COVID-19 and two during the pandemic. Of the total number of surveyed students, 143 are in the academic year 2021-2022 and 133 are in the academic year 2020-2021, when most of the education was online. 72 are in the academic year 2019-2020 and 121 are in the academic year 2018-2019. An analysis and comparison of the results of these three academic years was performed. Relevant conclusions about the impact of COVID-19 on the use of mobile learning are made.","PeriodicalId":441906,"journal":{"name":"2022 8th International Conference on Energy Efficiency and Agricultural Engineering (EE&AE)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124627360","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}
Pub Date : 2022-06-30DOI: 10.1109/eeae53789.2022.9831199
S. Belchev, T. Uzuntonev, R. Hristov, S. Kirov, D. Kovachev, S. Iliev
Pistons with altered form of the piston skirt contact area are presented in this paper. The efficiency of the new design has been evaluated by comparing the mechanical losses in the engines under equal operating conditions with conventional pistons and those with a special form of the contact surface. The use of such pistons does not change the degree of liquid friction. There is a significant change in the forces of dry friction at rest which is the reason for the friction power reduction and the mechanical losses of the pistons with a special form of the contact surface.
{"title":"The Effect of a Special Form of the Piston Skirt Profile on Power Friction Losses in Internal Combustion Engines","authors":"S. Belchev, T. Uzuntonev, R. Hristov, S. Kirov, D. Kovachev, S. Iliev","doi":"10.1109/eeae53789.2022.9831199","DOIUrl":"https://doi.org/10.1109/eeae53789.2022.9831199","url":null,"abstract":"Pistons with altered form of the piston skirt contact area are presented in this paper. The efficiency of the new design has been evaluated by comparing the mechanical losses in the engines under equal operating conditions with conventional pistons and those with a special form of the contact surface. The use of such pistons does not change the degree of liquid friction. There is a significant change in the forces of dry friction at rest which is the reason for the friction power reduction and the mechanical losses of the pistons with a special form of the contact surface.","PeriodicalId":441906,"journal":{"name":"2022 8th International Conference on Energy Efficiency and Agricultural Engineering (EE&AE)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126875275","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}
Pub Date : 2022-06-30DOI: 10.1109/eeae53789.2022.9831382
T. Stoyanova
An overview of the materials used in the construction industry in the context of environmental protection and sustainable development has been made. The emphasis is placed on the advantages of thermal insulation materials based on polymer foam. Different types of insulation materials used for indoor or outdoor installation have been studied and evaluated. The composition, structure, production methods and characteristics of the respective products are clarified. A study of the energy efficiency of a single family residential building is presented, in which energy consumption is reduced to 50% using 40 mm sheets of extruded polystyrene.
{"title":"Insulation materials and energy efficiency","authors":"T. Stoyanova","doi":"10.1109/eeae53789.2022.9831382","DOIUrl":"https://doi.org/10.1109/eeae53789.2022.9831382","url":null,"abstract":"An overview of the materials used in the construction industry in the context of environmental protection and sustainable development has been made. The emphasis is placed on the advantages of thermal insulation materials based on polymer foam. Different types of insulation materials used for indoor or outdoor installation have been studied and evaluated. The composition, structure, production methods and characteristics of the respective products are clarified. A study of the energy efficiency of a single family residential building is presented, in which energy consumption is reduced to 50% using 40 mm sheets of extruded polystyrene.","PeriodicalId":441906,"journal":{"name":"2022 8th International Conference on Energy Efficiency and Agricultural Engineering (EE&AE)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127362973","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}
Pub Date : 2022-06-30DOI: 10.1109/eeae53789.2022.9831256
A. Sevov, G. Komitov, I. Mitkov
The growing population of the land and the urbanization of more and more areas in connection with this poses new challenges to agricultural production. With each passing day we have to produce more than less. A key element of this cycle is the optimization of production. Increasingly, it is necessary to look for applied alternative methods and optimal solutions. Remote sensing is a very good alternative in modern technology. In our country, especially in intensive crops, such studies are almost non-existent. In connection with this and the new trends for the development of the European Union, part of which is the introduction of artificial intelligence in agriculture, it is necessary to look for new alternatives in the cultivation of crops. Therefore, the aim of the present study is to develop a methodology for monitoring the microclimate.
{"title":"An alternative methodology for distance monitoring of the micro-climate in field tomato production","authors":"A. Sevov, G. Komitov, I. Mitkov","doi":"10.1109/eeae53789.2022.9831256","DOIUrl":"https://doi.org/10.1109/eeae53789.2022.9831256","url":null,"abstract":"The growing population of the land and the urbanization of more and more areas in connection with this poses new challenges to agricultural production. With each passing day we have to produce more than less. A key element of this cycle is the optimization of production. Increasingly, it is necessary to look for applied alternative methods and optimal solutions. Remote sensing is a very good alternative in modern technology. In our country, especially in intensive crops, such studies are almost non-existent. In connection with this and the new trends for the development of the European Union, part of which is the introduction of artificial intelligence in agriculture, it is necessary to look for new alternatives in the cultivation of crops. Therefore, the aim of the present study is to develop a methodology for monitoring the microclimate.","PeriodicalId":441906,"journal":{"name":"2022 8th International Conference on Energy Efficiency and Agricultural Engineering (EE&AE)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131934107","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}
Pub Date : 2022-06-30DOI: 10.1109/eeae53789.2022.9831310
D. Grozdanov, Nikolay Luboslavov Hinov, Philip Vasilev
Induction brazing process of T-shaped copper tube assembly is reviewed and analyzed. Pipes are with significantly different sizes in diameter. 3D Numerical calculations are used for analysis and optimization of coil design choice and comparison. Electromagnetic field generated of two different type of coils are visualized and its heating effect is estimated in order to achieve proper processing.
{"title":"3D Model of T-Shaped Inductor for Induction Brazing","authors":"D. Grozdanov, Nikolay Luboslavov Hinov, Philip Vasilev","doi":"10.1109/eeae53789.2022.9831310","DOIUrl":"https://doi.org/10.1109/eeae53789.2022.9831310","url":null,"abstract":"Induction brazing process of T-shaped copper tube assembly is reviewed and analyzed. Pipes are with significantly different sizes in diameter. 3D Numerical calculations are used for analysis and optimization of coil design choice and comparison. Electromagnetic field generated of two different type of coils are visualized and its heating effect is estimated in order to achieve proper processing.","PeriodicalId":441906,"journal":{"name":"2022 8th International Conference on Energy Efficiency and Agricultural Engineering (EE&AE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131395390","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}
Pub Date : 2022-06-30DOI: 10.1109/eeae53789.2022.9831296
S. Lesecq, G. Keeley, G. Dudnik, Alan O'Riordan
The Farm-to-Fork Strategy requires strong decrease in the use of chemical pesticides and fertilisers to restore bio-diversity and avoid losses in the environment. This comes with the development of "integrated pest management" and "integrated nutrient management" approaches. Digitalization is foreseen as an enabler of the deployment of the Farm-to-fork strategy. However, digitalization comes with different challenges to be solved, ranging from technology robustness and distrust of the farmers to data ownership and management, but also digital divide. There digital solutions require in-situ measurement, satellite data, communication and Decision Support Systems to provide advices to the farmer regarding the management of his/her farm.
{"title":"Would digitalisation support transition towards more sustainable agriculture to meet the Green Deal ambition?","authors":"S. Lesecq, G. Keeley, G. Dudnik, Alan O'Riordan","doi":"10.1109/eeae53789.2022.9831296","DOIUrl":"https://doi.org/10.1109/eeae53789.2022.9831296","url":null,"abstract":"The Farm-to-Fork Strategy requires strong decrease in the use of chemical pesticides and fertilisers to restore bio-diversity and avoid losses in the environment. This comes with the development of \"integrated pest management\" and \"integrated nutrient management\" approaches. Digitalization is foreseen as an enabler of the deployment of the Farm-to-fork strategy. However, digitalization comes with different challenges to be solved, ranging from technology robustness and distrust of the farmers to data ownership and management, but also digital divide. There digital solutions require in-situ measurement, satellite data, communication and Decision Support Systems to provide advices to the farmer regarding the management of his/her farm.","PeriodicalId":441906,"journal":{"name":"2022 8th International Conference on Energy Efficiency and Agricultural Engineering (EE&AE)","volume":"261 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134138570","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}
Pub Date : 2022-06-30DOI: 10.1109/eeae53789.2022.9831263
Andrei Zaharia, V. Nedeff, Mihaela Culea, N. Bârsan, C. Tomozei
The issue of effluents loaded with toxic pollutants resulting from industrial activities, as well as solutions to reduce and eliminate them, is and will be a domain of interest for the vast majority of researchers. On this background, this paper outlines and develops the general elements as well as the current stages of research in the field of Ultrafiltration (UF) Membrane technology applied to various industrial sectors. The parameters and their influence on the efficiency of the UF process, the fundamental characteristics of the materials as well as various solutions for the improvement and maintenance of the membrane materials were also reviewed. Therefore, in order for a membrane material to be as efficient as possible in UF processes, the following aspects must be taken into account: the optimal operating conditions of the UF process, the morphological and hydrophilicity characteristics of the membrane material, as well as the origin and composition of the effluent.
{"title":"Applications of the Ultrafiltration Membranes in the Industrial Effluents Treatment Processes. A Short Review","authors":"Andrei Zaharia, V. Nedeff, Mihaela Culea, N. Bârsan, C. Tomozei","doi":"10.1109/eeae53789.2022.9831263","DOIUrl":"https://doi.org/10.1109/eeae53789.2022.9831263","url":null,"abstract":"The issue of effluents loaded with toxic pollutants resulting from industrial activities, as well as solutions to reduce and eliminate them, is and will be a domain of interest for the vast majority of researchers. On this background, this paper outlines and develops the general elements as well as the current stages of research in the field of Ultrafiltration (UF) Membrane technology applied to various industrial sectors. The parameters and their influence on the efficiency of the UF process, the fundamental characteristics of the materials as well as various solutions for the improvement and maintenance of the membrane materials were also reviewed. Therefore, in order for a membrane material to be as efficient as possible in UF processes, the following aspects must be taken into account: the optimal operating conditions of the UF process, the morphological and hydrophilicity characteristics of the membrane material, as well as the origin and composition of the effluent.","PeriodicalId":441906,"journal":{"name":"2022 8th International Conference on Energy Efficiency and Agricultural Engineering (EE&AE)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133384209","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}
Pub Date : 2022-06-30DOI: 10.1109/eeae53789.2022.9831420
V. Gandova, I. Petrova
The objective of this study is to investigate emulsion stability between soybean oil-water-soybean protein isolate (SI) system. The protein added as stabilizing emulsion, with different quantity 1 and 3 percent. Thermodynamic parameters Gibbs free energy, enthalpy and entropy for each emulsion were calculated. The samples of emulsions prepared with different pH interval. Microscopic observations and turbidity of all emulsions were prepared and used for determined stability of presented emulsions.
{"title":"Investigation of emulsion stability in Soybean protein isolates – Soybean oil – Water system","authors":"V. Gandova, I. Petrova","doi":"10.1109/eeae53789.2022.9831420","DOIUrl":"https://doi.org/10.1109/eeae53789.2022.9831420","url":null,"abstract":"The objective of this study is to investigate emulsion stability between soybean oil-water-soybean protein isolate (SI) system. The protein added as stabilizing emulsion, with different quantity 1 and 3 percent. Thermodynamic parameters Gibbs free energy, enthalpy and entropy for each emulsion were calculated. The samples of emulsions prepared with different pH interval. Microscopic observations and turbidity of all emulsions were prepared and used for determined stability of presented emulsions.","PeriodicalId":441906,"journal":{"name":"2022 8th International Conference on Energy Efficiency and Agricultural Engineering (EE&AE)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120924290","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}
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