Pub Date : 2021-06-22DOI: 10.23939/jtbp2021.01.023
P. Kapalo, K. Kozak, Khrystyna Myroniuk
One of the main tasks around the world is to reduce energy consumption with constant consumer comfort. The hot water supply system uses a significant part of thermal energy and requires no less attention than the heating or ventilation system. The amount of heat loss from hot water distribution systems is of great importance for the energy consumption of buildings. In winter, part of this heat is used for space heating, in summer they are unused and is considered as lost heat. For this reason, this paper considers the influence of water velocity in the pipe, pipe size, and water temperature on the total heat losses in the insulated hot-water distribution system. The data are presented in tabular and graphical form. A graph of the dependence of the amount of heat loss on the temperature and velocity of hot water is obtained.
{"title":"THE ANALYSIS OF WATER SPEED INFLUENCE IN HOT-WATER DISTRIBUTION SYSTEM ON THE AMOUNT OF HEAT LOSS","authors":"P. Kapalo, K. Kozak, Khrystyna Myroniuk","doi":"10.23939/jtbp2021.01.023","DOIUrl":"https://doi.org/10.23939/jtbp2021.01.023","url":null,"abstract":"One of the main tasks around the world is to reduce energy consumption with constant consumer comfort. The hot water supply system uses a significant part of thermal energy and requires no less attention than the heating or ventilation system. The amount of heat loss from hot water distribution systems is of great importance for the energy consumption of buildings. In winter, part of this heat is used for space heating, in summer they are unused and is considered as lost heat. For this reason, this paper considers the influence of water velocity in the pipe, pipe size, and water temperature on the total heat losses in the insulated hot-water distribution system. The data are presented in tabular and graphical form. A graph of the dependence of the amount of heat loss on the temperature and velocity of hot water is obtained.","PeriodicalId":369033,"journal":{"name":"Theory and Building Practice","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127064992","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 : 2021-06-22DOI: 10.23939/jtbp2021.01.015
S. Havryliak
Technological processes in all branches of production are maximally automated in the world, this also applies to construction. The main driver of automation of construction processes is 3D printing technology. The first driver was the invention of stereolithography technology, which was discovered in 1986 by American engineer Chuck Hull. The article describes the process of 3D printing technology, using different materials and printing principles. The main 3D printing includes the application of the material in layers at high temperatures (for small plastic products) and layer by layer of concrete mix and geopolymer concrete when printing houses. The first to start using 3D printers in construction was the Chinese company Winsun. Also considered are building structures (buildings and structures) that were built using 3D printers, compared to their technical and economic indicators. The positive and negative aspects of the use of 3D printers in construction are studied. In the future, it is planned to study plastics of ABS and PLA brands to create structural building elements with the subsequent use of these elements in construction.
{"title":"NEW TECHNOLOGIES IN THE FIELD OF CONSTRUCTION. USING 3D PRINTERS","authors":"S. Havryliak","doi":"10.23939/jtbp2021.01.015","DOIUrl":"https://doi.org/10.23939/jtbp2021.01.015","url":null,"abstract":"Technological processes in all branches of production are maximally automated in the world, this also applies to construction. The main driver of automation of construction processes is 3D printing technology. The first driver was the invention of stereolithography technology, which was discovered in 1986 by American engineer Chuck Hull. The article describes the process of 3D printing technology, using different materials and printing principles. The main 3D printing includes the application of the material in layers at high temperatures (for small plastic products) and layer by layer of concrete mix and geopolymer concrete when printing houses. The first to start using 3D printers in construction was the Chinese company Winsun. Also considered are building structures (buildings and structures) that were built using 3D printers, compared to their technical and economic indicators. The positive and negative aspects of the use of 3D printers in construction are studied. In the future, it is planned to study plastics of ABS and PLA brands to create structural building elements with the subsequent use of these elements in construction.","PeriodicalId":369033,"journal":{"name":"Theory and Building Practice","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115064083","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 : 2021-06-22DOI: 10.23939/jtbp2021.01.128
V. Labay, V. Yaroslav
In air split-conditioners, the degree of their energy perfection must be determined based on the analysis of their exergy efficiency. In this article the innovative mathematical model developed by the authors for exergetic analysis of the work of air split-conditioners. For example, exergetic analysis was performed on this model for the air split-conditioner with the nominal cooling capacity 2500 W of „Mitsubishi Electric” firm under standard external temperature conditions and received the output-input exergetic ratio (OIER) and exergetic losses in the air split-conditioner individual elements on the refrigerants R410A, R32 and refrigerant R290 (propane). It is shown that the the exergetic efficiency of the air split-conditioner increased by 9.3% and 5.1%, when using the R290 refrigerant compared to R410A and R32, respectively.
{"title":"INVESTIGATION THE EXERGETIC EFFICIENCY OF REFRIGERANT R290 (PROPANE) APPLICATION FOR WORK OF AIR SPLIT-CONDITIONER","authors":"V. Labay, V. Yaroslav","doi":"10.23939/jtbp2021.01.128","DOIUrl":"https://doi.org/10.23939/jtbp2021.01.128","url":null,"abstract":"In air split-conditioners, the degree of their energy perfection must be determined based on the analysis of their exergy efficiency. In this article the innovative mathematical model developed by the authors for exergetic analysis of the work of air split-conditioners. For example, exergetic analysis was performed on this model for the air split-conditioner with the nominal cooling capacity 2500 W of „Mitsubishi Electric” firm under standard external temperature conditions and received the output-input exergetic ratio (OIER) and exergetic losses in the air split-conditioner individual elements on the refrigerants R410A, R32 and refrigerant R290 (propane). It is shown that the the exergetic efficiency of the air split-conditioner increased by 9.3% and 5.1%, when using the R290 refrigerant compared to R410A and R32, respectively.","PeriodicalId":369033,"journal":{"name":"Theory and Building Practice","volume":"35 31","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113941494","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 : 2021-06-22DOI: 10.23939/jtbp2021.01.079
I. Kirakevych, M. Sanytsky, Orest Shyiko, Roman Kagarlitsky
The paper presents the results of research concerning the peculiarities of modern High Performance Concretes based on cementitious systems "Portland cement – active mineral additives – micro fillers – superplasticizers – accelerators of hardening". Physico-chemical regularities of structure formation of super plasticized cementitious systems are established. It is shown that the formation of secondary fine ettringite due to the interaction of active alumina with calcium hydroxide and gypsum in the non-clinker part of the binder because of the effect of "self-reinforcement" compensates for shrinkage and increases the strength of the cementitious system. The modification of the cementitious matrix makes it possible to obtain Rapid Hardening High Performance Concretes that provide early loading and turnover of the formwork of monolithic constructions.
{"title":"MODIFICATION OF CEMENTITIOUS MATRIX OF RAPID-HARDENING HIGH-PERFORMANCE CONCRETES","authors":"I. Kirakevych, M. Sanytsky, Orest Shyiko, Roman Kagarlitsky","doi":"10.23939/jtbp2021.01.079","DOIUrl":"https://doi.org/10.23939/jtbp2021.01.079","url":null,"abstract":"The paper presents the results of research concerning the peculiarities of modern High Performance Concretes based on cementitious systems \"Portland cement – active mineral additives – micro fillers – superplasticizers – accelerators of hardening\". Physico-chemical regularities of structure formation of super plasticized cementitious systems are established. It is shown that the formation of secondary fine ettringite due to the interaction of active alumina with calcium hydroxide and gypsum in the non-clinker part of the binder because of the effect of \"self-reinforcement\" compensates for shrinkage and increases the strength of the cementitious system. The modification of the cementitious matrix makes it possible to obtain Rapid Hardening High Performance Concretes that provide early loading and turnover of the formwork of monolithic constructions.","PeriodicalId":369033,"journal":{"name":"Theory and Building Practice","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123697691","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 : 2021-06-22DOI: 10.23939/jtbp2021.01.120
O. Voznyak, Yuriy Yurkevych, O. Dovbush, Khrystyna Myroniuk
The article presents the results of theoretical and experimental developments regarding the marking of scans and patterns of fittings of the ventilation system, provided that the unification of installation and procurement work. The aim of the work is to create a graph-analytical method to unify the construction of patterns of ventilation fittings, in particular in the design and manufacture of adapters of different shapes and sizes; increasing the efficiency of procurement work for the installation of ventilation systems in production facilities by minimizing material waste during their manufacture, and reducing the material consumption of products. The application of the proposed graphic-analytical method will increase the efficiency of procurement and installation work and thus reduce the amount of waste and material consumption for the manufacture of ventilation fittings for various purposes.
{"title":"GRAPHIC-ANALYTICAL METHOD OF CONSTRUCTION OF PATTERNS OF VENTILATION FITTINGS","authors":"O. Voznyak, Yuriy Yurkevych, O. Dovbush, Khrystyna Myroniuk","doi":"10.23939/jtbp2021.01.120","DOIUrl":"https://doi.org/10.23939/jtbp2021.01.120","url":null,"abstract":"The article presents the results of theoretical and experimental developments regarding the marking of scans and patterns of fittings of the ventilation system, provided that the unification of installation and procurement work. The aim of the work is to create a graph-analytical method to unify the construction of patterns of ventilation fittings, in particular in the design and manufacture of adapters of different shapes and sizes; increasing the efficiency of procurement work for the installation of ventilation systems in production facilities by minimizing material waste during their manufacture, and reducing the material consumption of products. The application of the proposed graphic-analytical method will increase the efficiency of procurement and installation work and thus reduce the amount of waste and material consumption for the manufacture of ventilation fittings for various purposes.","PeriodicalId":369033,"journal":{"name":"Theory and Building Practice","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134315792","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 : 2021-06-22DOI: 10.23939/jtbp2021.01.029
Yurii Furdas, K. Kozak, O. Savchenko, Mariia Lunyk, Mykola Hensetskyi
As raw materials in bioenergy can be used agricultural residues formed in the process of harvesting crops and the process of their processing, in particular straw cereals, legumes, corn and sunflower seeds, etc. For energy needs, agricultural biomass is used by burning or processing into solid, liquid, or gaseous fuels. In the production of gaseous fuel in special plants - bioreactors, agricultural waste is formed not only as a source of energy - biogas, but also as excellent fertilizers. In this article, studies have shown that the amount of biogas produced depends on the type of biomass and fermentation time. The largest amount of biogas is produced within 10 days from the date of loading of organic biomass. It was found that the highest daily biogas production is formed from grass and grain silage, the maximum value of which is 1.76 m3. The smallest - from rapeseed silage – 0.33 m3.
{"title":"THE USE OF AGRICULTURAL BIOMASS AS A SOURCE FOR BIOGAS PRODUCTION","authors":"Yurii Furdas, K. Kozak, O. Savchenko, Mariia Lunyk, Mykola Hensetskyi","doi":"10.23939/jtbp2021.01.029","DOIUrl":"https://doi.org/10.23939/jtbp2021.01.029","url":null,"abstract":"As raw materials in bioenergy can be used agricultural residues formed in the process of harvesting crops and the process of their processing, in particular straw cereals, legumes, corn and sunflower seeds, etc. For energy needs, agricultural biomass is used by burning or processing into solid, liquid, or gaseous fuels. In the production of gaseous fuel in special plants - bioreactors, agricultural waste is formed not only as a source of energy - biogas, but also as excellent fertilizers. In this article, studies have shown that the amount of biogas produced depends on the type of biomass and fermentation time. The largest amount of biogas is produced within 10 days from the date of loading of organic biomass. It was found that the highest daily biogas production is formed from grass and grain silage, the maximum value of which is 1.76 m3. The smallest - from rapeseed silage – 0.33 m3.","PeriodicalId":369033,"journal":{"name":"Theory and Building Practice","volume":"319 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115883406","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 : 2021-06-22DOI: 10.23939/jtbp2021.01.051
V. Pashkevych, M. Malashkin, V. Zhelykh, O. Lozynskyy
The research work is devoted to the survey of the power economy of Lviv Polytechnic National University to assess energy security, to improve the strategy of energy use, and to develop measures for improving the energy security of the university. The first chapter provides a brief description of the proposed method of studying the energy security of the university. It is based on the method of determining 46 indicators according to which five criteria of energy security are formed: Energy efficiency, Energy independence, Energy security, Reliability of heat supply, Economic stability. In the eighth chapter, according to the mentioned indicators the estimates of criteria are calculated and the analysis of their levels is carried out. Based on this analysis, the principles of improving the energy security of the university are proposed.
{"title":"ASSESSMENT OF ENERGY SECURITY OF HIGHER EDUCATION INSTITUTIONS","authors":"V. Pashkevych, M. Malashkin, V. Zhelykh, O. Lozynskyy","doi":"10.23939/jtbp2021.01.051","DOIUrl":"https://doi.org/10.23939/jtbp2021.01.051","url":null,"abstract":"The research work is devoted to the survey of the power economy of Lviv Polytechnic National University to assess energy security, to improve the strategy of energy use, and to develop measures for improving the energy security of the university. The first chapter provides a brief description of the proposed method of studying the energy security of the university. It is based on the method of determining 46 indicators according to which five criteria of energy security are formed: Energy efficiency, Energy independence, Energy security, Reliability of heat supply, Economic stability. In the eighth chapter, according to the mentioned indicators the estimates of criteria are calculated and the analysis of their levels is carried out. Based on this analysis, the principles of improving the energy security of the university are proposed.","PeriodicalId":369033,"journal":{"name":"Theory and Building Practice","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133229090","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 : 2021-06-22DOI: 10.23939/jtbp2021.01.106
Volodymyr Bidos, T. Markiv, Serhiy Solodkyy
This article proves the possibility of replacing aggregates in concrete mixtures with rubber, which is obtained by grinding used car tires. It was found that the replacement of crushed coarse aggregate in the amount of 10 vol.% with ground rubber from used car tires increases the bending strength by 23% The compressive strength does not change significantly. When working in the subcritical stage of deformation (until the macrocrack shifts), concrete with the replacement of the coarse aggregate is preferred, as the energy consumption of which for elastic deformation (We) exceeds the base concrete. Analysis of the supercritical stage of deformation (macrocrack propagation) reveals that the replacement of fine and coarse aggregates negatively affects the value of total energy consumption for local static deformation in the main crack zone (Wl), which is by 1.35 and 1.14 times lower than the control concrete.
{"title":"MECHANICAL PROPERTIES OF CEMENT CONCRETES INCORPORATING GROUND TIRE RUBBER","authors":"Volodymyr Bidos, T. Markiv, Serhiy Solodkyy","doi":"10.23939/jtbp2021.01.106","DOIUrl":"https://doi.org/10.23939/jtbp2021.01.106","url":null,"abstract":"This article proves the possibility of replacing aggregates in concrete mixtures with rubber, which is obtained by grinding used car tires. It was found that the replacement of crushed coarse aggregate in the amount of 10 vol.% with ground rubber from used car tires increases the bending strength by 23% The compressive strength does not change significantly. When working in the subcritical stage of deformation (until the macrocrack shifts), concrete with the replacement of the coarse aggregate is preferred, as the energy consumption of which for elastic deformation (We) exceeds the base concrete. Analysis of the supercritical stage of deformation (macrocrack propagation) reveals that the replacement of fine and coarse aggregates negatively affects the value of total energy consumption for local static deformation in the main crack zone (Wl), which is by 1.35 and 1.14 times lower than the control concrete.","PeriodicalId":369033,"journal":{"name":"Theory and Building Practice","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130376815","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 : 2021-06-22DOI: 10.23939/jtbp2021.01.064
Myron Ноhоl, I. Peleshko, Oleksii Petrenko, Dmytro Sydorak
The article is devoted to the calculated regulation of the stress deformation state (SDS) of combined steel trusses, which allows to reduce the efforts in some sections of the structure by increasing the efforts in other and design evenly stressed structures as the most rational systems. It is shown that the calculated method of SDS regulation makes it possible to reduce steel consumption by up to 34%. Four methods of calculated SDS regulation are proposed. The advantages of combined structures are given: the concentration of materials and the possibility of designing them as low-element. As shown in the example, for the quantitative criterion of quality it is possible to use rationally the maximum potential energy of deformation. Dependences for calculation of the maximum potential energy of compressed stretched, and compressed-bent elements of rod-bearing steel structures are given.
{"title":"ANALYSIS OF CALCULATION REGULATION METHODS IN STEEL COMBINED TRUSSES","authors":"Myron Ноhоl, I. Peleshko, Oleksii Petrenko, Dmytro Sydorak","doi":"10.23939/jtbp2021.01.064","DOIUrl":"https://doi.org/10.23939/jtbp2021.01.064","url":null,"abstract":"The article is devoted to the calculated regulation of the stress deformation state (SDS) of combined steel trusses, which allows to reduce the efforts in some sections of the structure by increasing the efforts in other and design evenly stressed structures as the most rational systems. It is shown that the calculated method of SDS regulation makes it possible to reduce steel consumption by up to 34%. Four methods of calculated SDS regulation are proposed. The advantages of combined structures are given: the concentration of materials and the possibility of designing them as low-element. As shown in the example, for the quantitative criterion of quality it is possible to use rationally the maximum potential energy of deformation. Dependences for calculation of the maximum potential energy of compressed stretched, and compressed-bent elements of rod-bearing steel structures are given.","PeriodicalId":369033,"journal":{"name":"Theory and Building Practice","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126059256","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 : 2021-06-22DOI: 10.23939/jtbp2021.01.100
Y. Blikharskyy
This article presents the results of an experimental study of damaged reinforced concrete beams. Corrosion of reinforcement in concrete is one of the main problems of durability faced in practice by civil engineers. Particular attention should be paid to the action of an aggressive environment as one of the most common causes of the introduction of elements into an emergency. The aim of the work is to determine the strength and deformability of reinforced concrete structures without damaging the reinforcement and in case of damage. According to the research program 4 beams were tested. Among them were undamaged control samples with single reinforcement of ∅20 mm diameter and samples with ∅20 mm reinforcement with damages about 40%. The reinforcement was damaged before concreting the samples. The test specimens were tested for bending under short-term load. At the result impact of damage to reinforcement in RC beams reduces the load-bearing capacity. The results are given in the article.
{"title":"EXPERIMENTAL RESULTS OF DAMAGED RC BEAMS","authors":"Y. Blikharskyy","doi":"10.23939/jtbp2021.01.100","DOIUrl":"https://doi.org/10.23939/jtbp2021.01.100","url":null,"abstract":"This article presents the results of an experimental study of damaged reinforced concrete beams. Corrosion of reinforcement in concrete is one of the main problems of durability faced in practice by civil engineers. Particular attention should be paid to the action of an aggressive environment as one of the most common causes of the introduction of elements into an emergency. The aim of the work is to determine the strength and deformability of reinforced concrete structures without damaging the reinforcement and in case of damage. According to the research program 4 beams were tested. Among them were undamaged control samples with single reinforcement of ∅20 mm diameter and samples with ∅20 mm reinforcement with damages about 40%. The reinforcement was damaged before concreting the samples. The test specimens were tested for bending under short-term load. At the result impact of damage to reinforcement in RC beams reduces the load-bearing capacity. The results are given in the article.","PeriodicalId":369033,"journal":{"name":"Theory and Building Practice","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124056732","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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