Laplace transformation has been used for solving Schrodinger equation in momentum space without using integral equation (Fourier transformation) because it is much harder and more complicated. Furthermore, energy spectra and particle distributions have been demonstrated by using Schrodinger differential equation without ignoring dimensions or units. In addition, a maple program has also been considered to solve the method since it can help to pave a way for other models to work in quantum mechanics.
{"title":"New technique for solving harmonic oscillator system in momentum space","authors":"A. Ahmed, H. Hussein","doi":"10.1063/1.5138510","DOIUrl":"https://doi.org/10.1063/1.5138510","url":null,"abstract":"Laplace transformation has been used for solving Schrodinger equation in momentum space without using integral equation (Fourier transformation) because it is much harder and more complicated. Furthermore, energy spectra and particle distributions have been demonstrated by using Schrodinger differential equation without ignoring dimensions or units. In addition, a maple program has also been considered to solve the method since it can help to pave a way for other models to work in quantum mechanics.","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134531092","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}
A. Maftah, Zineb Cabrane, Kawtar Benabdelaziz, M. Maaroufi
This paper presents a comparison of two mathematical models of photovoltaic modules, namely: a Real Photovoltaic model and an Improved Photovoltaic Model. These models were evaluated to test their accuracy and predict electrical performance, for the purpose of selecting the suitable model under arid climate conditions. An experimental study using two PV technologies mounted in an outdoor setting, namely amorphous silicon (a-Si) and polycrystalline, is then conducted to validate the mathematical model. Results show a good agreement between experiment and simulation using the improved model for the both PV technologies that adequate to simulate the PV production of two technologies under arid climate, a with good coefficient of determination equaling 0.9672 for the polycrystalline and 0.9957 for amorphous technology. This validation represents a useful tool for researchers in this field and for professional use cases in this location.This paper presents a comparison of two mathematical models of photovoltaic modules, namely: a Real Photovoltaic model and an Improved Photovoltaic Model. These models were evaluated to test their accuracy and predict electrical performance, for the purpose of selecting the suitable model under arid climate conditions. An experimental study using two PV technologies mounted in an outdoor setting, namely amorphous silicon (a-Si) and polycrystalline, is then conducted to validate the mathematical model. Results show a good agreement between experiment and simulation using the improved model for the both PV technologies that adequate to simulate the PV production of two technologies under arid climate, a with good coefficient of determination equaling 0.9672 for the polycrystalline and 0.9957 for amorphous technology. This validation represents a useful tool for researchers in this field and for professional use cases in this location.
{"title":"Modeling and experimental study of the performance of two photovoltaic technologies under arid climate","authors":"A. Maftah, Zineb Cabrane, Kawtar Benabdelaziz, M. Maaroufi","doi":"10.1063/1.5138578","DOIUrl":"https://doi.org/10.1063/1.5138578","url":null,"abstract":"This paper presents a comparison of two mathematical models of photovoltaic modules, namely: a Real Photovoltaic model and an Improved Photovoltaic Model. These models were evaluated to test their accuracy and predict electrical performance, for the purpose of selecting the suitable model under arid climate conditions. An experimental study using two PV technologies mounted in an outdoor setting, namely amorphous silicon (a-Si) and polycrystalline, is then conducted to validate the mathematical model. Results show a good agreement between experiment and simulation using the improved model for the both PV technologies that adequate to simulate the PV production of two technologies under arid climate, a with good coefficient of determination equaling 0.9672 for the polycrystalline and 0.9957 for amorphous technology. This validation represents a useful tool for researchers in this field and for professional use cases in this location.This paper presents a comparison of two mathematical models of photovoltaic modules, namely: a Real Photovoltaic model and an Improved Photovoltaic Model. These models were evaluated to test their accuracy and predict electrical performance, for the purpose of selecting the suitable model under arid climate conditions. An experimental study using two PV technologies mounted in an outdoor setting, namely amorphous silicon (a-Si) and polycrystalline, is then conducted to validate the mathematical model. Results show a good agreement between experiment and simulation using the improved model for the both PV technologies that adequate to simulate the PV production of two technologies under arid climate, a with good coefficient of determination equaling 0.9672 for the polycrystalline and 0.9957 for amorphous technology. This validation represents a useful tool for researchers in this field and for professional use cases in this location.","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132784811","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}
Supply of safe water remains a challenge for the city of Tirana. Despite the improvement of the distribution network and recent investments, in many rural areas near the city of Tirana, drinking water supply is still not provided by the Tirana water supply distribution network. The lack of tap water has led to alternative findings of residents of these areas. One of them is the construction of private wells. The water quality doesn’t monitor by Laboratory of quality of water or Sanitary Inspectorate of Tirana. The lack of water quality control can lead to an undesirable situation for well water users. Given this situation, we thought to control the quality of well water in these areas. In this study are presented the microbiological data for the quality of well water used by families who have migrated from different areas of Albania to live near the city of Tirana during the last 5 years. The depth of wells varies from 5-100 meter. Sampling was done from April to September 2018. The total of samples was 180 from five areas of Tirana. Number of wells analyzed is 30. The data of this study show that 100% of water wells are contaminated by the presence of Escherichia coli. In 30% of water, wells are observed the presence of Entreroccocus fecal. Based on the data of this study, the water wells not recommended consuming by these families. We suggest residents treat the water before using. The simple method is chlorinating of water after deposition in tank, to eliminate the microorganism because they can be caused human health effects.Supply of safe water remains a challenge for the city of Tirana. Despite the improvement of the distribution network and recent investments, in many rural areas near the city of Tirana, drinking water supply is still not provided by the Tirana water supply distribution network. The lack of tap water has led to alternative findings of residents of these areas. One of them is the construction of private wells. The water quality doesn’t monitor by Laboratory of quality of water or Sanitary Inspectorate of Tirana. The lack of water quality control can lead to an undesirable situation for well water users. Given this situation, we thought to control the quality of well water in these areas. In this study are presented the microbiological data for the quality of well water used by families who have migrated from different areas of Albania to live near the city of Tirana during the last 5 years. The depth of wells varies from 5-100 meter. Sampling was done from April to September 2018. The total of samples was 1...
{"title":"Assessment of quality of water wells in rural areas in Tirana City, Albania","authors":"M. Bakalli, Danjela Bakalli, Julis Selamaj","doi":"10.1063/1.5138500","DOIUrl":"https://doi.org/10.1063/1.5138500","url":null,"abstract":"Supply of safe water remains a challenge for the city of Tirana. Despite the improvement of the distribution network and recent investments, in many rural areas near the city of Tirana, drinking water supply is still not provided by the Tirana water supply distribution network. The lack of tap water has led to alternative findings of residents of these areas. One of them is the construction of private wells. The water quality doesn’t monitor by Laboratory of quality of water or Sanitary Inspectorate of Tirana. The lack of water quality control can lead to an undesirable situation for well water users. Given this situation, we thought to control the quality of well water in these areas. In this study are presented the microbiological data for the quality of well water used by families who have migrated from different areas of Albania to live near the city of Tirana during the last 5 years. The depth of wells varies from 5-100 meter. Sampling was done from April to September 2018. The total of samples was 180 from five areas of Tirana. Number of wells analyzed is 30. The data of this study show that 100% of water wells are contaminated by the presence of Escherichia coli. In 30% of water, wells are observed the presence of Entreroccocus fecal. Based on the data of this study, the water wells not recommended consuming by these families. We suggest residents treat the water before using. The simple method is chlorinating of water after deposition in tank, to eliminate the microorganism because they can be caused human health effects.Supply of safe water remains a challenge for the city of Tirana. Despite the improvement of the distribution network and recent investments, in many rural areas near the city of Tirana, drinking water supply is still not provided by the Tirana water supply distribution network. The lack of tap water has led to alternative findings of residents of these areas. One of them is the construction of private wells. The water quality doesn’t monitor by Laboratory of quality of water or Sanitary Inspectorate of Tirana. The lack of water quality control can lead to an undesirable situation for well water users. Given this situation, we thought to control the quality of well water in these areas. In this study are presented the microbiological data for the quality of well water used by families who have migrated from different areas of Albania to live near the city of Tirana during the last 5 years. The depth of wells varies from 5-100 meter. Sampling was done from April to September 2018. The total of samples was 1...","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114943199","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}
Transient simulation was used to study the heating and cooling loads in growing-finishing piggeries under different climatic conditions aiming at always keeping the inside temperature and relative humidity within the animals’ production space. Hourly climatic data from Heraklion in South Greece and Kastoria in North Greece, the pigs’ sensible and latent heat loads, the heat flow through the building elements and the carbon dioxide concentration control ventilation heat loads were considered. For all studied weights (40 kg, 70 kg and 100 kg) the annual heating loads for Heraklion were zero and for Kastoria ranged from 1.8 kWh/m2year to 2.92 kWh/m2year or 0.04 kWh/kg to 0.02 kWh/kg. The corresponding cooling loads for Heraklion were 1.86 to 1.9 times higher than for Kastoria, namely 359.02 kWh/m2year to 669.30 kWh/m2year vs. 188.84 kWh/m2year to 359.76 kWh/m2year or 7.02 kWh/kg to 5.24 kWh/kg vs. 3.69 kWh/kg to 2.81 kWh/kg. An efficient energy design of the piggery (i.e. appropriate orientation, proper insulation thickness and summer sun shading using deciduous trees) would possibly result in a significant reduction of cooling loads, which could be covered using an air-conditioning system operating based on renewable energy technologies.Transient simulation was used to study the heating and cooling loads in growing-finishing piggeries under different climatic conditions aiming at always keeping the inside temperature and relative humidity within the animals’ production space. Hourly climatic data from Heraklion in South Greece and Kastoria in North Greece, the pigs’ sensible and latent heat loads, the heat flow through the building elements and the carbon dioxide concentration control ventilation heat loads were considered. For all studied weights (40 kg, 70 kg and 100 kg) the annual heating loads for Heraklion were zero and for Kastoria ranged from 1.8 kWh/m2year to 2.92 kWh/m2year or 0.04 kWh/kg to 0.02 kWh/kg. The corresponding cooling loads for Heraklion were 1.86 to 1.9 times higher than for Kastoria, namely 359.02 kWh/m2year to 669.30 kWh/m2year vs. 188.84 kWh/m2year to 359.76 kWh/m2year or 7.02 kWh/kg to 5.24 kWh/kg vs. 3.69 kWh/kg to 2.81 kWh/kg. An efficient energy design of the piggery (i.e. appropriate orientation, proper insu...
{"title":"Comparison of heating and cooling loads in a controlled environment growing-finishing piggery under different climatic conditions","authors":"P. Panagakis, P. Axaopoulos","doi":"10.1063/1.5138515","DOIUrl":"https://doi.org/10.1063/1.5138515","url":null,"abstract":"Transient simulation was used to study the heating and cooling loads in growing-finishing piggeries under different climatic conditions aiming at always keeping the inside temperature and relative humidity within the animals’ production space. Hourly climatic data from Heraklion in South Greece and Kastoria in North Greece, the pigs’ sensible and latent heat loads, the heat flow through the building elements and the carbon dioxide concentration control ventilation heat loads were considered. For all studied weights (40 kg, 70 kg and 100 kg) the annual heating loads for Heraklion were zero and for Kastoria ranged from 1.8 kWh/m2year to 2.92 kWh/m2year or 0.04 kWh/kg to 0.02 kWh/kg. The corresponding cooling loads for Heraklion were 1.86 to 1.9 times higher than for Kastoria, namely 359.02 kWh/m2year to 669.30 kWh/m2year vs. 188.84 kWh/m2year to 359.76 kWh/m2year or 7.02 kWh/kg to 5.24 kWh/kg vs. 3.69 kWh/kg to 2.81 kWh/kg. An efficient energy design of the piggery (i.e. appropriate orientation, proper insulation thickness and summer sun shading using deciduous trees) would possibly result in a significant reduction of cooling loads, which could be covered using an air-conditioning system operating based on renewable energy technologies.Transient simulation was used to study the heating and cooling loads in growing-finishing piggeries under different climatic conditions aiming at always keeping the inside temperature and relative humidity within the animals’ production space. Hourly climatic data from Heraklion in South Greece and Kastoria in North Greece, the pigs’ sensible and latent heat loads, the heat flow through the building elements and the carbon dioxide concentration control ventilation heat loads were considered. For all studied weights (40 kg, 70 kg and 100 kg) the annual heating loads for Heraklion were zero and for Kastoria ranged from 1.8 kWh/m2year to 2.92 kWh/m2year or 0.04 kWh/kg to 0.02 kWh/kg. The corresponding cooling loads for Heraklion were 1.86 to 1.9 times higher than for Kastoria, namely 359.02 kWh/m2year to 669.30 kWh/m2year vs. 188.84 kWh/m2year to 359.76 kWh/m2year or 7.02 kWh/kg to 5.24 kWh/kg vs. 3.69 kWh/kg to 2.81 kWh/kg. An efficient energy design of the piggery (i.e. appropriate orientation, proper insu...","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133780926","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}
Industrialization, overpopulation, rapid evolution and the human need to increase our living standards often have a negative impact on our environment. Novel ideas and optimized methods must be used not only to halt this negative impact but also to reverse it. One method to do this is by harvesting renewable energy and when not consumed, storing it for use when required. This paper presents a review, focused on energy storage with Lithium batteries and their penetration in the military sector. Applications of use are, from grid connected and autonomous systems with energy storage, microgrids, hybrid and electric vehicles to portable tools or even entertainment equipment. Lithium batteries provide an efficient means of storage but still require improvement. This paper shall also review literature that addresses up to date methods that improve efficiency and their positive impact on Lithium battery life expectancy.Industrialization, overpopulation, rapid evolution and the human need to increase our living standards often have a negative impact on our environment. Novel ideas and optimized methods must be used not only to halt this negative impact but also to reverse it. One method to do this is by harvesting renewable energy and when not consumed, storing it for use when required. This paper presents a review, focused on energy storage with Lithium batteries and their penetration in the military sector. Applications of use are, from grid connected and autonomous systems with energy storage, microgrids, hybrid and electric vehicles to portable tools or even entertainment equipment. Lithium batteries provide an efficient means of storage but still require improvement. This paper shall also review literature that addresses up to date methods that improve efficiency and their positive impact on Lithium battery life expectancy.
{"title":"Lithium batteries: Storage applications and methods to improve efficiency","authors":"Dionysios Koutsouvelis, G. Vokas","doi":"10.1063/1.5138557","DOIUrl":"https://doi.org/10.1063/1.5138557","url":null,"abstract":"Industrialization, overpopulation, rapid evolution and the human need to increase our living standards often have a negative impact on our environment. Novel ideas and optimized methods must be used not only to halt this negative impact but also to reverse it. One method to do this is by harvesting renewable energy and when not consumed, storing it for use when required. This paper presents a review, focused on energy storage with Lithium batteries and their penetration in the military sector. Applications of use are, from grid connected and autonomous systems with energy storage, microgrids, hybrid and electric vehicles to portable tools or even entertainment equipment. Lithium batteries provide an efficient means of storage but still require improvement. This paper shall also review literature that addresses up to date methods that improve efficiency and their positive impact on Lithium battery life expectancy.Industrialization, overpopulation, rapid evolution and the human need to increase our living standards often have a negative impact on our environment. Novel ideas and optimized methods must be used not only to halt this negative impact but also to reverse it. One method to do this is by harvesting renewable energy and when not consumed, storing it for use when required. This paper presents a review, focused on energy storage with Lithium batteries and their penetration in the military sector. Applications of use are, from grid connected and autonomous systems with energy storage, microgrids, hybrid and electric vehicles to portable tools or even entertainment equipment. Lithium batteries provide an efficient means of storage but still require improvement. This paper shall also review literature that addresses up to date methods that improve efficiency and their positive impact on Lithium battery life expectancy.","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134514569","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}
The European Directives, along with the general notion that wastes are resources, and the effort to reduce the environmental impact in urban environment from waste management, are the driving forces behind waste to energy philosophy. The most sustainable cities in the EU consider that their sustainability is also based on energy recovery from wastes. They all use Waste-to-Energy facilities to treat a significant segment of their waste in order to produce energy in the form of heat and electricity. They do so in a very successful and environmentally friendly way, as they mainly utilise waste fractions that cannot be recycled or reused, and they do not dispose of these resources in landfills. This approach proves that sustainable waste management cannot be achieved without Waste-to-Energy facilities, since a fraction of wastes consists of non-recyclable and non- reusable materials, which provide a significant heating value that cannot be neglected as an energy source. Apart from recycling, Municipal Solid Waste (MSW) treatment is achieved through various processes that aim towards the conversion of waste into useful forms of energy or easily biodegradable, stabilized products. Dedicated treatment methods for getting different refuse derived products that can be used as fuel for producing energy are available. The aim of this paper is to briefly present these methods, review their processes and reveal where their individual energy costs/losses are derived from. A review and a calculation example for the methods of Recycling, Anaerobic Digestion, Composting, Biodrying and combustion are presented concisely. Finally, these methods are compared in terms of energy costs and recovery. Moreover, the calculation methodology of the energy costs of MSW treatment facility is presented. Energy costs/losses are not a synonym for the efficiency of a MSW treatment method, but are an important factor that must be taken into consideration when designing a MSW treatment facility. Furthermore, different waste mixtures will provide different results for this study but the main conclusion remains unaltered: In terms of energy demand for waste management a percentage of methods are energy consuming and others are energy producing, or lead to significant energy savings, which is key action for a sustainable future. Municipal wastes is one of the greatest problems that the modern societies must solve. The current approach is the environmental impact of the method considering the volumes that must be treated and the sustainability of the method. Last but not least, energy consumption must be adopted in each and every human activity so as to achieve sustainable development.The European Directives, along with the general notion that wastes are resources, and the effort to reduce the environmental impact in urban environment from waste management, are the driving forces behind waste to energy philosophy. The most sustainable cities in the EU consider that their sustainability
{"title":"Evaluating the energy demand for municipal solid wastes treatment facilities: A critical approach toward sustainable development","authors":"C. Psomopoulos, I. Limperis, K. Kalkanis","doi":"10.1063/1.5138532","DOIUrl":"https://doi.org/10.1063/1.5138532","url":null,"abstract":"The European Directives, along with the general notion that wastes are resources, and the effort to reduce the environmental impact in urban environment from waste management, are the driving forces behind waste to energy philosophy. The most sustainable cities in the EU consider that their sustainability is also based on energy recovery from wastes. They all use Waste-to-Energy facilities to treat a significant segment of their waste in order to produce energy in the form of heat and electricity. They do so in a very successful and environmentally friendly way, as they mainly utilise waste fractions that cannot be recycled or reused, and they do not dispose of these resources in landfills. This approach proves that sustainable waste management cannot be achieved without Waste-to-Energy facilities, since a fraction of wastes consists of non-recyclable and non- reusable materials, which provide a significant heating value that cannot be neglected as an energy source. Apart from recycling, Municipal Solid Waste (MSW) treatment is achieved through various processes that aim towards the conversion of waste into useful forms of energy or easily biodegradable, stabilized products. Dedicated treatment methods for getting different refuse derived products that can be used as fuel for producing energy are available. The aim of this paper is to briefly present these methods, review their processes and reveal where their individual energy costs/losses are derived from. A review and a calculation example for the methods of Recycling, Anaerobic Digestion, Composting, Biodrying and combustion are presented concisely. Finally, these methods are compared in terms of energy costs and recovery. Moreover, the calculation methodology of the energy costs of MSW treatment facility is presented. Energy costs/losses are not a synonym for the efficiency of a MSW treatment method, but are an important factor that must be taken into consideration when designing a MSW treatment facility. Furthermore, different waste mixtures will provide different results for this study but the main conclusion remains unaltered: In terms of energy demand for waste management a percentage of methods are energy consuming and others are energy producing, or lead to significant energy savings, which is key action for a sustainable future. Municipal wastes is one of the greatest problems that the modern societies must solve. The current approach is the environmental impact of the method considering the volumes that must be treated and the sustainability of the method. Last but not least, energy consumption must be adopted in each and every human activity so as to achieve sustainable development.The European Directives, along with the general notion that wastes are resources, and the effort to reduce the environmental impact in urban environment from waste management, are the driving forces behind waste to energy philosophy. The most sustainable cities in the EU consider that their sustainability","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129610510","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}
The augmented popularity of all ceramic materials as an alternative to metal ceramic restorations attributed to their Excellent Aesthetics, Chemical Stability, and Biocompatibility. Recently, the expansion of advanced dental ceramics has led to the application of partially stabilized zirconia in restorative dentistry. In this study, we prepared zirconia matrix stabilized in the Tetragonal Phase by adding yttrium oxide (3% mol. Y2O3) with homogeneous distribution for different weight additions of (2%, 5%, 7%, 10%) wt of F-MWCNTs as reinforced to form (3% mol. Y2O3-ZrO2 / F-MWCNTs ) Nano composite materials using pressing uniaxially (624) MPa in the metal-die cylindrical to form pellets of (10 mm diameter), Then the pellets were sintering in air at (1550°C) for (2) hours. The results were characterized by using FTIR to determine the vibrational mode after treated MWCNTs. Besides, study the Cell viability of samples by MTT assay to investigate the activity of composite (3% mol. Y2O3- ZrO2) (10%) wt. F-MWCNTs in kill the tumor cells. The results improved best antibacterial activity of samples at concentration the 150µg.mL−1 of the ratio (7% - 10%) wt. of F-MWCNTs where three types of bacteria pathogen (E. coli, P. aeruginosa and S. aureus) which show the good antibacterial activity, also can see the good results of adhesion bacterial.The augmented popularity of all ceramic materials as an alternative to metal ceramic restorations attributed to their Excellent Aesthetics, Chemical Stability, and Biocompatibility. Recently, the expansion of advanced dental ceramics has led to the application of partially stabilized zirconia in restorative dentistry. In this study, we prepared zirconia matrix stabilized in the Tetragonal Phase by adding yttrium oxide (3% mol. Y2O3) with homogeneous distribution for different weight additions of (2%, 5%, 7%, 10%) wt of F-MWCNTs as reinforced to form (3% mol. Y2O3-ZrO2 / F-MWCNTs ) Nano composite materials using pressing uniaxially (624) MPa in the metal-die cylindrical to form pellets of (10 mm diameter), Then the pellets were sintering in air at (1550°C) for (2) hours. The results were characterized by using FTIR to determine the vibrational mode after treated MWCNTs. Besides, study the Cell viability of samples by MTT assay to investigate the activity of composite (3% mol. Y2O3- ZrO2) (10%) wt. F-MWCNTs...
{"title":"Studying the effect of MWCNTs/zirconia nano composite in reducing tumor cells","authors":"Sadeer M. Majeed, D. Ahmed, Hadeer Ahmed","doi":"10.1063/1.5138551","DOIUrl":"https://doi.org/10.1063/1.5138551","url":null,"abstract":"The augmented popularity of all ceramic materials as an alternative to metal ceramic restorations attributed to their Excellent Aesthetics, Chemical Stability, and Biocompatibility. Recently, the expansion of advanced dental ceramics has led to the application of partially stabilized zirconia in restorative dentistry. In this study, we prepared zirconia matrix stabilized in the Tetragonal Phase by adding yttrium oxide (3% mol. Y2O3) with homogeneous distribution for different weight additions of (2%, 5%, 7%, 10%) wt of F-MWCNTs as reinforced to form (3% mol. Y2O3-ZrO2 / F-MWCNTs ) Nano composite materials using pressing uniaxially (624) MPa in the metal-die cylindrical to form pellets of (10 mm diameter), Then the pellets were sintering in air at (1550°C) for (2) hours. The results were characterized by using FTIR to determine the vibrational mode after treated MWCNTs. Besides, study the Cell viability of samples by MTT assay to investigate the activity of composite (3% mol. Y2O3- ZrO2) (10%) wt. F-MWCNTs in kill the tumor cells. The results improved best antibacterial activity of samples at concentration the 150µg.mL−1 of the ratio (7% - 10%) wt. of F-MWCNTs where three types of bacteria pathogen (E. coli, P. aeruginosa and S. aureus) which show the good antibacterial activity, also can see the good results of adhesion bacterial.The augmented popularity of all ceramic materials as an alternative to metal ceramic restorations attributed to their Excellent Aesthetics, Chemical Stability, and Biocompatibility. Recently, the expansion of advanced dental ceramics has led to the application of partially stabilized zirconia in restorative dentistry. In this study, we prepared zirconia matrix stabilized in the Tetragonal Phase by adding yttrium oxide (3% mol. Y2O3) with homogeneous distribution for different weight additions of (2%, 5%, 7%, 10%) wt of F-MWCNTs as reinforced to form (3% mol. Y2O3-ZrO2 / F-MWCNTs ) Nano composite materials using pressing uniaxially (624) MPa in the metal-die cylindrical to form pellets of (10 mm diameter), Then the pellets were sintering in air at (1550°C) for (2) hours. The results were characterized by using FTIR to determine the vibrational mode after treated MWCNTs. Besides, study the Cell viability of samples by MTT assay to investigate the activity of composite (3% mol. Y2O3- ZrO2) (10%) wt. F-MWCNTs...","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129882501","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}
Alaa Sulaiman, A. Farouk, Samir A. Salman, T. Al-Dhahir, Tagreed M Al-Saadi, E. E. Al-Abodi
Magnetite Nanoparticles (MNPs) of Fe3O4 have been prepared by a co-precipitation method of ferrous and ferric aqueous solution at sodium salt to controlling by the grain size of (MNPs). The prepared nanoparticles coated by polyethylene glycol, to obtain PEG-MNPs composite for the efficient removal the Methylene blue dye from the aqueous solutions. The prepared samples have characterized by several techniques like (FTIR) spectroscopy, (XRD), (AFM) and (SEM). The research testing the ability of coated magnetite as adsorbents surface for removing of methylene blue dye from the aqueous solution within variable experimental factors. The obtained data from this study revealed that high efficiency was observed and all adsorption processes well agree with Frindlesch model, the adsorption capacity increases with the pH increases, which enhances the process of dye removal.Magnetite Nanoparticles (MNPs) of Fe3O4 have been prepared by a co-precipitation method of ferrous and ferric aqueous solution at sodium salt to controlling by the grain size of (MNPs). The prepared nanoparticles coated by polyethylene glycol, to obtain PEG-MNPs composite for the efficient removal the Methylene blue dye from the aqueous solutions. The prepared samples have characterized by several techniques like (FTIR) spectroscopy, (XRD), (AFM) and (SEM). The research testing the ability of coated magnetite as adsorbents surface for removing of methylene blue dye from the aqueous solution within variable experimental factors. The obtained data from this study revealed that high efficiency was observed and all adsorption processes well agree with Frindlesch model, the adsorption capacity increases with the pH increases, which enhances the process of dye removal.
{"title":"PEG-coated magnetite nanoparticles as adsorbents surface for remove methylene blue dye from aqueous solutions","authors":"Alaa Sulaiman, A. Farouk, Samir A. Salman, T. Al-Dhahir, Tagreed M Al-Saadi, E. E. Al-Abodi","doi":"10.1063/1.5138526","DOIUrl":"https://doi.org/10.1063/1.5138526","url":null,"abstract":"Magnetite Nanoparticles (MNPs) of Fe3O4 have been prepared by a co-precipitation method of ferrous and ferric aqueous solution at sodium salt to controlling by the grain size of (MNPs). The prepared nanoparticles coated by polyethylene glycol, to obtain PEG-MNPs composite for the efficient removal the Methylene blue dye from the aqueous solutions. The prepared samples have characterized by several techniques like (FTIR) spectroscopy, (XRD), (AFM) and (SEM). The research testing the ability of coated magnetite as adsorbents surface for removing of methylene blue dye from the aqueous solution within variable experimental factors. The obtained data from this study revealed that high efficiency was observed and all adsorption processes well agree with Frindlesch model, the adsorption capacity increases with the pH increases, which enhances the process of dye removal.Magnetite Nanoparticles (MNPs) of Fe3O4 have been prepared by a co-precipitation method of ferrous and ferric aqueous solution at sodium salt to controlling by the grain size of (MNPs). The prepared nanoparticles coated by polyethylene glycol, to obtain PEG-MNPs composite for the efficient removal the Methylene blue dye from the aqueous solutions. The prepared samples have characterized by several techniques like (FTIR) spectroscopy, (XRD), (AFM) and (SEM). The research testing the ability of coated magnetite as adsorbents surface for removing of methylene blue dye from the aqueous solution within variable experimental factors. The obtained data from this study revealed that high efficiency was observed and all adsorption processes well agree with Frindlesch model, the adsorption capacity increases with the pH increases, which enhances the process of dye removal.","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127901729","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}
The aim of this research is to study the influence of adding the residues of natural materials that are represented by using wood minutes (reed) on the epoxy, and to study the Tribology properties of composite. (Epoxy resins/Wood minutes(reed) Composite has been prepared by casting method with weight fraction (0, 20, 30, 40, 50) % and treated (reed) by sodium chloride solution (0.5), in addition the effect of the change in particle size of the wood (reed) has been studied, where its range (60, 150,212) µm. Tribology properties which include hardness, impact resistance, wear rate have been tested. The results show that the hardness rate of epoxy reduces which equal to 28, but after adding the reinforcement material of reed by weight fraction 20% to the epoxy it is observed that a clear improvement in the hardness values where its reaches to 34, it is also noticed the effect of the small particle size of the wood on the hardness rate is higher at 212µm, where hardness rate reaches to 61. The results of impact test illustrate that the impact resistance is increased with the increase of additive material (reed) for all particle sizes (60,150,212) µm and also for all weight fraction. the results of wear rate test show that the rate of wear for epoxy resin gives high values but when epoxy is reinforced by wood minutes (reed), this leads to obvious reducing in the wear rate.
{"title":"Preparation and study the tribology properties for (epoxy resins/wood minutes (Reed) composite","authors":"R. A. Abed, A. R. Al-sarraf, M. Al-maamori","doi":"10.1063/1.5138574","DOIUrl":"https://doi.org/10.1063/1.5138574","url":null,"abstract":"The aim of this research is to study the influence of adding the residues of natural materials that are represented by using wood minutes (reed) on the epoxy, and to study the Tribology properties of composite. (Epoxy resins/Wood minutes(reed) Composite has been prepared by casting method with weight fraction (0, 20, 30, 40, 50) % and treated (reed) by sodium chloride solution (0.5), in addition the effect of the change in particle size of the wood (reed) has been studied, where its range (60, 150,212) µm. Tribology properties which include hardness, impact resistance, wear rate have been tested. The results show that the hardness rate of epoxy reduces which equal to 28, but after adding the reinforcement material of reed by weight fraction 20% to the epoxy it is observed that a clear improvement in the hardness values where its reaches to 34, it is also noticed the effect of the small particle size of the wood on the hardness rate is higher at 212µm, where hardness rate reaches to 61. The results of impact test illustrate that the impact resistance is increased with the increase of additive material (reed) for all particle sizes (60,150,212) µm and also for all weight fraction. the results of wear rate test show that the rate of wear for epoxy resin gives high values but when epoxy is reinforced by wood minutes (reed), this leads to obvious reducing in the wear rate.","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124297496","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}
Louiza Moutafi, Evdoxia Koutsoula, Ioannis Kanavos, G. Vokas
Recent changes in the Greek legislation concerning the production of electricity from Renewable Energy Sources (RES) has accordingly changed the investment terms of RES investments. Therefore, the impact of these changes both on the Greek electricity market and on the RES projects is important to be examined. More specifically, the RES production units were separated with the criteria of the renewable energy source type that they use, their installed capacity and the region in which they are located. It was considered useful to determine the number of the parks per renewable energy source type, per installed capacity level and per region and to examine the number of the parks whose contract is going to be out of force in the next years. Taking into account the above separation, and in order to find out the consequences of legislation's changes, some representative samples were selected and the Pay-Back Period, the Net Present Value (NPV) and the Internal Rate of Return (IRR) of Wind Parks (WP) and Photovoltaic Parks (PV) were calculated.Recent changes in the Greek legislation concerning the production of electricity from Renewable Energy Sources (RES) has accordingly changed the investment terms of RES investments. Therefore, the impact of these changes both on the Greek electricity market and on the RES projects is important to be examined. More specifically, the RES production units were separated with the criteria of the renewable energy source type that they use, their installed capacity and the region in which they are located. It was considered useful to determine the number of the parks per renewable energy source type, per installed capacity level and per region and to examine the number of the parks whose contract is going to be out of force in the next years. Taking into account the above separation, and in order to find out the consequences of legislation's changes, some representative samples were selected and the Pay-Back Period, the Net Present Value (NPV) and the Internal Rate of Return (IRR) of Wind Parks (WP) and Photovo...
{"title":"Impact of energy policy changes on RES investments","authors":"Louiza Moutafi, Evdoxia Koutsoula, Ioannis Kanavos, G. Vokas","doi":"10.1063/1.5138556","DOIUrl":"https://doi.org/10.1063/1.5138556","url":null,"abstract":"Recent changes in the Greek legislation concerning the production of electricity from Renewable Energy Sources (RES) has accordingly changed the investment terms of RES investments. Therefore, the impact of these changes both on the Greek electricity market and on the RES projects is important to be examined. More specifically, the RES production units were separated with the criteria of the renewable energy source type that they use, their installed capacity and the region in which they are located. It was considered useful to determine the number of the parks per renewable energy source type, per installed capacity level and per region and to examine the number of the parks whose contract is going to be out of force in the next years. Taking into account the above separation, and in order to find out the consequences of legislation's changes, some representative samples were selected and the Pay-Back Period, the Net Present Value (NPV) and the Internal Rate of Return (IRR) of Wind Parks (WP) and Photovoltaic Parks (PV) were calculated.Recent changes in the Greek legislation concerning the production of electricity from Renewable Energy Sources (RES) has accordingly changed the investment terms of RES investments. Therefore, the impact of these changes both on the Greek electricity market and on the RES projects is important to be examined. More specifically, the RES production units were separated with the criteria of the renewable energy source type that they use, their installed capacity and the region in which they are located. It was considered useful to determine the number of the parks per renewable energy source type, per installed capacity level and per region and to examine the number of the parks whose contract is going to be out of force in the next years. Taking into account the above separation, and in order to find out the consequences of legislation's changes, some representative samples were selected and the Pay-Back Period, the Net Present Value (NPV) and the Internal Rate of Return (IRR) of Wind Parks (WP) and Photovo...","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124050829","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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