Pub Date : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712870
H. Kumar, S. Ravikumar
Energy and the environment are two of the most important issues this century. More than 80 % of our energy comes from the combustion of fossil fuels, which will still remain the dominant energy source for years to come. It is agreed that carbon dioxide produced from the combustion process to be the most important anthropogenic greenhouse gas leading to global warming. Atmospheric CO2 concentrations have indeed increased by almost 100 ppm since their pre-industrial level, reaching 384 ppm in 2007 and still increasing with a total annual emission of over 35 Gt. Prompt global actions to resolve the CO2 crisis is therefore needed. To pursue such an action, we are urged to save energy without the unnecessary production of carbon emissions and to use energy in more efficient ways, but alternative methods to mitigate the greenhouse gas have to be considered. There is a large energy penalty in the proven technology of chemical absorption/stripping of CO2 using amine solvents. The aim in this study is to develop fast catalytic absorption/ desorption of CO2 at low temperatures using water as solvent. The naturally occurring zinc metallo-enzyme carbonic anhydrase (CA) can concentrate CO2 using a reversible Hydration /dehydration cycle at neutral pH and at ambient temperatures. Some tripodal complexes of zinc (II), and other metals mimic the CA catalytic process, which proceeds by hydration of CO2 to bicarbonate followed by the reverse dehydration of the bicarbonate to regenerate CO2. This Minireview highlights some recent promising research activities and their prospects in the areas of carbon capture and storage and chemical fixation of CO2 in constructing a future low-carbon global economy with reference to energy
{"title":"An approach of CO2 capture technology for mitigating global warming and climate change-an overview","authors":"H. Kumar, S. Ravikumar","doi":"10.1109/RSTSCC.2010.5712870","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712870","url":null,"abstract":"Energy and the environment are two of the most important issues this century. More than 80 % of our energy comes from the combustion of fossil fuels, which will still remain the dominant energy source for years to come. It is agreed that carbon dioxide produced from the combustion process to be the most important anthropogenic greenhouse gas leading to global warming. Atmospheric CO2 concentrations have indeed increased by almost 100 ppm since their pre-industrial level, reaching 384 ppm in 2007 and still increasing with a total annual emission of over 35 Gt. Prompt global actions to resolve the CO2 crisis is therefore needed. To pursue such an action, we are urged to save energy without the unnecessary production of carbon emissions and to use energy in more efficient ways, but alternative methods to mitigate the greenhouse gas have to be considered. There is a large energy penalty in the proven technology of chemical absorption/stripping of CO2 using amine solvents. The aim in this study is to develop fast catalytic absorption/ desorption of CO2 at low temperatures using water as solvent. The naturally occurring zinc metallo-enzyme carbonic anhydrase (CA) can concentrate CO2 using a reversible Hydration /dehydration cycle at neutral pH and at ambient temperatures. Some tripodal complexes of zinc (II), and other metals mimic the CA catalytic process, which proceeds by hydration of CO2 to bicarbonate followed by the reverse dehydration of the bicarbonate to regenerate CO2. This Minireview highlights some recent promising research activities and their prospects in the areas of carbon capture and storage and chemical fixation of CO2 in constructing a future low-carbon global economy with reference to energy","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132369320","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 : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712816
J. Jena, P. Sahu
The Ka-band (20–30 GHz) frequency spectrum has recently gained attention for satellite communication. High Definition Television (HDTV), which needs a much larger bandwidth for transmission, coupled with the current demand for hundreds of television channels and the growth in Internet communications through Direct-To-Home (DTH), is resulting in a communications bandwidth shortage. One tool being used to address this problem is Satellite Spot-Beams. To design effective satellite communication system operation at extremely high frequency band (Ka and higher bands), the effect of meteorology is important compared to Ku-band frequencies. Keeping view of the socio-economic and geographic diversities of India, Propagation studies are essential for estimation of attenuation, so that Ka-band satellite links operating in different parts of Indian region can be registered appropriately. This paper analyzes Ka-band satellite communications link availability in various geographical separated spot beams in India using statistical data. This paper proposes 16 spot-beam locations to cover Indian main land. It is based on global rain models integrated with the link budget. The global Crane model and ITU-DAH rain model allow us to examine major system design issues encountered in Ka-band satellite communications that are susceptible to propagation impairments. This system is flexible enough to increase power on specific transmissions when needed to compensate for local weather conditions.
{"title":"Rain fade and Ka-band Spot Beam Satellite communication in India","authors":"J. Jena, P. Sahu","doi":"10.1109/RSTSCC.2010.5712816","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712816","url":null,"abstract":"The Ka-band (20–30 GHz) frequency spectrum has recently gained attention for satellite communication. High Definition Television (HDTV), which needs a much larger bandwidth for transmission, coupled with the current demand for hundreds of television channels and the growth in Internet communications through Direct-To-Home (DTH), is resulting in a communications bandwidth shortage. One tool being used to address this problem is Satellite Spot-Beams. To design effective satellite communication system operation at extremely high frequency band (Ka and higher bands), the effect of meteorology is important compared to Ku-band frequencies. Keeping view of the socio-economic and geographic diversities of India, Propagation studies are essential for estimation of attenuation, so that Ka-band satellite links operating in different parts of Indian region can be registered appropriately. This paper analyzes Ka-band satellite communications link availability in various geographical separated spot beams in India using statistical data. This paper proposes 16 spot-beam locations to cover Indian main land. It is based on global rain models integrated with the link budget. The global Crane model and ITU-DAH rain model allow us to examine major system design issues encountered in Ka-band satellite communications that are susceptible to propagation impairments. This system is flexible enough to increase power on specific transmissions when needed to compensate for local weather conditions.","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114926172","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 : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712791
Zareena Begum Irfan
Environment and health are inextricably interlinked. The physical environment, such as drinking water, sanitation, housing, and air, has considerable effects on the health status and well being of people. Environmental change and its attendant health impacts are driven by many factors, including economic growth, population growth and movements. The three broad trends — the intensification of agriculture, industrialization, and rising energy use — which stand out in terms of their profound impacts on the physical environment and their enormous potential for influencing human health. Rapid urbanization and the uncontrolled growth of urban slums are now creating a double environmental health burden for the urban poor. In India, premature death and illness due to major environmental health risks accounts for nearly 20 percent of the total burden of disease in India. Proper environmental management is the key to avoiding the quarter of all preventable illnesses which are directly caused by environmental factors. There is an immediate need to tackle environmental health issues. Problems such as unsafe water, sanitation and hygiene, and air pollution are major contributors to the worldwide disease burden.
{"title":"Environmental pollution and public health: The socio-economic analysis of the global drivers of change","authors":"Zareena Begum Irfan","doi":"10.1109/RSTSCC.2010.5712791","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712791","url":null,"abstract":"Environment and health are inextricably interlinked. The physical environment, such as drinking water, sanitation, housing, and air, has considerable effects on the health status and well being of people. Environmental change and its attendant health impacts are driven by many factors, including economic growth, population growth and movements. The three broad trends — the intensification of agriculture, industrialization, and rising energy use — which stand out in terms of their profound impacts on the physical environment and their enormous potential for influencing human health. Rapid urbanization and the uncontrolled growth of urban slums are now creating a double environmental health burden for the urban poor. In India, premature death and illness due to major environmental health risks accounts for nearly 20 percent of the total burden of disease in India. Proper environmental management is the key to avoiding the quarter of all preventable illnesses which are directly caused by environmental factors. There is an immediate need to tackle environmental health issues. Problems such as unsafe water, sanitation and hygiene, and air pollution are major contributors to the worldwide disease burden.","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114708743","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 : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712808
John Blesswin, V Rema, J. Joselin
Security has become an inseparable issue even in the field of space technology. Visual Cryptography is the study of mathematical techniques related aspects of Information Security which allows Visual information to be encrypted in such a way that their decryption can be performed by the human visual system, without any complex cryptographic algorithms. This technique represents the secret image by several different shares of binary images. It is hard to perceive any clues about a secret image from individual shares. The secret message is revealed when parts or all of these shares are aligned and stacked together. In this paper we provide an overview of the emerging Visual Cryptography (VC) techniques used in the secure transfer of the thousands of images collected by the satellite which are stored in image library and sent to Google for use on Google Earth and Google maps. The related work is based on the recovering of secret image using a binary logo which is used to represent the ownership of the host image which generate shadows by visual cryptography algorithms. An error correction-coding scheme is also used to create the appropriate shadow. The logo extracted from the half-toned host image identifies the cheating types. Furthermore, the logo recovers the reconstructed image when shadow is being cheated using an image self-verification scheme based on the Rehash technique which rehash the halftone logo for effective self verification of the reconstructed secret image without the need for the trusted third party(TTP).
{"title":"Effective recovery technique for halftone images in Visual Cryptography","authors":"John Blesswin, V Rema, J. Joselin","doi":"10.1109/RSTSCC.2010.5712808","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712808","url":null,"abstract":"Security has become an inseparable issue even in the field of space technology. Visual Cryptography is the study of mathematical techniques related aspects of Information Security which allows Visual information to be encrypted in such a way that their decryption can be performed by the human visual system, without any complex cryptographic algorithms. This technique represents the secret image by several different shares of binary images. It is hard to perceive any clues about a secret image from individual shares. The secret message is revealed when parts or all of these shares are aligned and stacked together. In this paper we provide an overview of the emerging Visual Cryptography (VC) techniques used in the secure transfer of the thousands of images collected by the satellite which are stored in image library and sent to Google for use on Google Earth and Google maps. The related work is based on the recovering of secret image using a binary logo which is used to represent the ownership of the host image which generate shadows by visual cryptography algorithms. An error correction-coding scheme is also used to create the appropriate shadow. The logo extracted from the half-toned host image identifies the cheating types. Furthermore, the logo recovers the reconstructed image when shadow is being cheated using an image self-verification scheme based on the Rehash technique which rehash the halftone logo for effective self verification of the reconstructed secret image without the need for the trusted third party(TTP).","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115959561","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 : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712799
H. Albert, C. Alosious Gonsago, N. Victor Jaya, M. Muralidhar
The effect of high pressure and high temperature on electrical resistivity behavior of (Nd, Eu, Gd) Ba-Cu-O superconductor with 10wt %Ag2O addition was studied. This high Tc superconductor was synthesized using the oxygen controlled melt growth process(OCMG). At room temperature, there was an initial drop in the resistivity of the superconductor up to 3GPa, followed by a nearly constant value up to 8GPa pressure. The steady value of resistivity observed between 3 and 8GPa decreased with increasing Ag2O content. The superconducting composite formed exhibited a metallic nature under pressure up to 8GPa.
{"title":"Effect of high pressure and high temperature on (Nd, Eu, Gd) Ba-Cu-O superconductor","authors":"H. Albert, C. Alosious Gonsago, N. Victor Jaya, M. Muralidhar","doi":"10.1109/RSTSCC.2010.5712799","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712799","url":null,"abstract":"The effect of high pressure and high temperature on electrical resistivity behavior of (Nd, Eu, Gd) Ba-Cu-O superconductor with 10wt %Ag2O addition was studied. This high Tc superconductor was synthesized using the oxygen controlled melt growth process(OCMG). At room temperature, there was an initial drop in the resistivity of the superconductor up to 3GPa, followed by a nearly constant value up to 8GPa pressure. The steady value of resistivity observed between 3 and 8GPa decreased with increasing Ag2O content. The superconducting composite formed exhibited a metallic nature under pressure up to 8GPa.","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116184227","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 : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712877
B. Vijayalakshmi, M. R. E. Jebarani, S. Nisha
The temperature of earth intact is determined by the set of scales between incoming and outgoing energy. Climate changes happen largely from changes to the earth's heat equilibrium. Many factors that manipulated by natural processes and human-made processes. The main factors influencing climate change are extraterrestrial factors, volcanism, earth's surface reflectivity and atmospheric factors. It is the impacts from anthropogenic processes, through the enhanced greenhouse effect, which are likely to be causing contemporary climate change. This in turn could bring about considerable environmental, social and economic disruption if adequate alleviation and variation measures are not implemented. The effectiveness of climate change due to green house effect can be reduced by reducing the surface reflectivity. For this an embedded earth reflection observer is designed. The system is inclusive of flimsy reflection observer, oriented rigidly to a predefined optimized observation angle. It observes the maximum level of transmitted heat from the earth and avoids the effectiveness of climate to shift from its natural state. The designed system maintains the environment temperature not greater than 32° centigrade with ±0.4% of error for a selected sample region during midday irrespective of the day conditions.
{"title":"Prevention from dynamic issues owing to surface reflection persuade the climate change","authors":"B. Vijayalakshmi, M. R. E. Jebarani, S. Nisha","doi":"10.1109/RSTSCC.2010.5712877","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712877","url":null,"abstract":"The temperature of earth intact is determined by the set of scales between incoming and outgoing energy. Climate changes happen largely from changes to the earth's heat equilibrium. Many factors that manipulated by natural processes and human-made processes. The main factors influencing climate change are extraterrestrial factors, volcanism, earth's surface reflectivity and atmospheric factors. It is the impacts from anthropogenic processes, through the enhanced greenhouse effect, which are likely to be causing contemporary climate change. This in turn could bring about considerable environmental, social and economic disruption if adequate alleviation and variation measures are not implemented. The effectiveness of climate change due to green house effect can be reduced by reducing the surface reflectivity. For this an embedded earth reflection observer is designed. The system is inclusive of flimsy reflection observer, oriented rigidly to a predefined optimized observation angle. It observes the maximum level of transmitted heat from the earth and avoids the effectiveness of climate to shift from its natural state. The designed system maintains the environment temperature not greater than 32° centigrade with ±0.4% of error for a selected sample region during midday irrespective of the day conditions.","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122348814","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 : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712889
L. R. Akshaya Deepa, N. Praveen
India is now put into the pressure of reducing the emission GHG (Green House Gases) into the atmosphere due to its climatic change. The responsibility of the reduction of the greenhouse gas emissions lies largely with the industrialized world, though the developing countries are likely to be the source of an increasing proportion of future emissions. The projected climate change under various scenarios is likely to have implications on food production, water supply, coastal settlements, forest ecosystems, health, energy security etc. The survey says that the global mean temperature may increase between 1.4 and 5.8 degrees Celsius (C) by 2100. This unprecedented increase is expected to have severe impacts on the global hydrological system, ecosystems, sea level, crop production and related processes. The impact would be particularly severe in the tropical areas, which mainly consist of developing countries, including India. The impact of the GHG emission on the Climate Change is now worsening than we imagined a decade ago. India being the Developing country was not able to adopt any strategy because it is more concerned to the social economic development. The most effective way is to adopt a sustainable development pathway by shifting to the environmentally sustainable technologies and promotion of water conservation, renewable energy, forest conservation and energy efficiency. It's the responsibility of the Indian Scientists to bring up various sustainable methods and technologies which will be accepted environmentally and globally too. Other than talking about socio economic growth, concentration must be dissipated to the introduction of the green technology into the development of the sustainable technologies for the prevailing problem of the Climate change impact.
{"title":"Impact of Climate change and adaptation to green technology in India","authors":"L. R. Akshaya Deepa, N. Praveen","doi":"10.1109/RSTSCC.2010.5712889","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712889","url":null,"abstract":"India is now put into the pressure of reducing the emission GHG (Green House Gases) into the atmosphere due to its climatic change. The responsibility of the reduction of the greenhouse gas emissions lies largely with the industrialized world, though the developing countries are likely to be the source of an increasing proportion of future emissions. The projected climate change under various scenarios is likely to have implications on food production, water supply, coastal settlements, forest ecosystems, health, energy security etc. The survey says that the global mean temperature may increase between 1.4 and 5.8 degrees Celsius (C) by 2100. This unprecedented increase is expected to have severe impacts on the global hydrological system, ecosystems, sea level, crop production and related processes. The impact would be particularly severe in the tropical areas, which mainly consist of developing countries, including India. The impact of the GHG emission on the Climate Change is now worsening than we imagined a decade ago. India being the Developing country was not able to adopt any strategy because it is more concerned to the social economic development. The most effective way is to adopt a sustainable development pathway by shifting to the environmentally sustainable technologies and promotion of water conservation, renewable energy, forest conservation and energy efficiency. It's the responsibility of the Indian Scientists to bring up various sustainable methods and technologies which will be accepted environmentally and globally too. Other than talking about socio economic growth, concentration must be dissipated to the introduction of the green technology into the development of the sustainable technologies for the prevailing problem of the Climate change impact.","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128017222","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 : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712839
V. Sridevi, T. Jayanthy
Carbon Nano Tube (CNT) is one of the several cutting edge emerging technologies within Nano technology, that is showing high efficiency and very wide range of applications in many different streams of science and technology. The Carbon Nano Tube Field Effect Transistors (CNTFETs) have been explored and proposed to be the promising candidate for the next generation of integrated circuit (IC) devices. To explore the role of CNTFETs in future integrated circuits, it is important to evaluate their performance. However, to do that we need a model that can accurately describe the behavior of the CNTFETs so that the design and evaluation of circuits using these devices can be made. This paper focuses on compact modeling of CNTFET and analysis of the performance of the developed model using various characteristics.
{"title":"Unipolar characteristics of Carbon Nanotube Field Effect Transistor","authors":"V. Sridevi, T. Jayanthy","doi":"10.1109/RSTSCC.2010.5712839","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712839","url":null,"abstract":"Carbon Nano Tube (CNT) is one of the several cutting edge emerging technologies within Nano technology, that is showing high efficiency and very wide range of applications in many different streams of science and technology. The Carbon Nano Tube Field Effect Transistors (CNTFETs) have been explored and proposed to be the promising candidate for the next generation of integrated circuit (IC) devices. To explore the role of CNTFETs in future integrated circuits, it is important to evaluate their performance. However, to do that we need a model that can accurately describe the behavior of the CNTFETs so that the design and evaluation of circuits using these devices can be made. This paper focuses on compact modeling of CNTFET and analysis of the performance of the developed model using various characteristics.","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128688930","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 : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712834
V. Sivachidambaranathan, S. Dash
This paper presents the simulation of Half Bridge Series Resonant Power Factor Correction (PFC) DC - DC converter with high frequency transformer isolation using Matlab Simulink. Resonant converters have no switching loss and are more suitable for high frequency operations. The switches in resonant converters turn on and off under zero current and/or zero voltage and there is no switching loss.This converter uses a gating scheme suitable for integrating buck converter and PWM DC to DC converter using a single control. A model for DC - DC Half bridge Series Resonant PFC converter has been developed and the MATLAB simulation results for the converter are presented.
本文利用Matlab Simulink对高频变压器隔离的半桥串联谐振功率因数校正(PFC) DC - DC变换器进行仿真。谐振变换器没有开关损耗，更适合于高频工作。谐振变换器中的开关在零电流和/或零电压下接通和关闭，并且没有开关损耗。该变换器采用门控方案，适用于buck变换器和PWM DC到DC变换器的集成。建立了直流-直流半桥串联谐振PFC变换器的模型，并给出了该变换器的MATLAB仿真结果。
{"title":"Simulation of Half Bridge Series Resonant PFC DC to DC converter","authors":"V. Sivachidambaranathan, S. Dash","doi":"10.1109/RSTSCC.2010.5712834","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712834","url":null,"abstract":"This paper presents the simulation of Half Bridge Series Resonant Power Factor Correction (PFC) DC - DC converter with high frequency transformer isolation using Matlab Simulink. Resonant converters have no switching loss and are more suitable for high frequency operations. The switches in resonant converters turn on and off under zero current and/or zero voltage and there is no switching loss.This converter uses a gating scheme suitable for integrating buck converter and PWM DC to DC converter using a single control. A model for DC - DC Half bridge Series Resonant PFC converter has been developed and the MATLAB simulation results for the converter are presented.","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127049364","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 : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712795
R. Samuel Selvaraj, V. Sivamadhavi
Global warming is due to many factors such as the variation in the incoming solar radiation, earth's magnetic field, atmospheric conditions such as cloud formation, aerosol content, Green House Effect, etc. In the present study, the contribution of Green House Effect is being explored. First, a theoretical estimate of Green House Effect is presented with a verification using the observed values. Then, the contribution of the Green House Gases based on its concentration is calculated. Of the various Green House Gases, we have taken Carbon di oxide, Methane, Nitrous oxide, Chloro Fluoro Carbon-11 & 12 for our study. Of these gases, the contribution of carbon di oxide alone is found to be about 66% of the total magnitude of the Green House Effect.
{"title":"Magnitude of Green House Effect and the contribution of Carbon di oxide","authors":"R. Samuel Selvaraj, V. Sivamadhavi","doi":"10.1109/RSTSCC.2010.5712795","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712795","url":null,"abstract":"Global warming is due to many factors such as the variation in the incoming solar radiation, earth's magnetic field, atmospheric conditions such as cloud formation, aerosol content, Green House Effect, etc. In the present study, the contribution of Green House Effect is being explored. First, a theoretical estimate of Green House Effect is presented with a verification using the observed values. Then, the contribution of the Green House Gases based on its concentration is calculated. Of the various Green House Gases, we have taken Carbon di oxide, Methane, Nitrous oxide, Chloro Fluoro Carbon-11 & 12 for our study. Of these gases, the contribution of carbon di oxide alone is found to be about 66% of the total magnitude of the Green House Effect.","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121325456","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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