An energy production system consisting of a solar collector, biogas dry reforming reactor and solid oxide fuel cell (SOFC) was assumed to be installed in Kolkata, India. This study aims to understand the impact of cli...An energy production system consisting of a solar collector, biogas dry reforming reactor and solid oxide fuel cell (SOFC) was assumed to be installed in Kolkata, India. This study aims to understand the impact of climate conditions on the performance of solar collectors with different lengths of parabolic trough solar collector (dx) and mass flow rate of heat transfer fluid (m). In addition, this study has evaluated the amount of H2 produced by biogas dry reforming (GH2), the amount of power generated by SOFC (PSOFC) and the maximum number of possible households (N) whose electricity demand could be met by the energy system proposed, considering the performance of solar collector with the different dx and m. As a result, the optimum dx was found to be 4 m. This study revealed that the temperature of heat transfer fluid (Tfb) decreased with the increase in m. Tfb in March, April and May was higher than that in other months, while Tfb from June to December was the lowest. GH2, PSOFC and N in March, April and May were higher than those in other months, irrespective of m. The optimum m was 0.030 kg/s.展开更多
Utility of geochemistry in mineral exploration is known since more than half-a-century.In reconnaissance diamond exploration,regolith geochemistry is a well known tool worldwide and helps in distinguishing bedrock
A numerous studies have been done on climate change at regional, national and global levels. Several climate models have predicted the global scenarios for climate in different parts of the world. However, the signifi...A numerous studies have been done on climate change at regional, national and global levels. Several climate models have predicted the global scenarios for climate in different parts of the world. However, the significance and practical implementation of such models at local level yet to be validated. This is because those national or global models do not consider micro variables such as such as environmental resources for example ‘land availability, local climatic conditions, socioeconomic factors such as ‘labour and capital’, policy aspects such as ‘subsidies, nature conservation strategies’ and competition for labor and capital in relation of ‘national economy’. India, with a huge diversity in land, topography, climate and socioeconomic conditions, divided into 15 agro-ecological zones. Further, to help develop location specific research and development strategies at the micro level, a total of 127 sub-zones (agro-climatic sub regions) have been identified in India. Therefore, research on climate change and its impact only at the regional or national level may not be a sound approach to provide solutions for adaptation to climate change at micro level. Thus the micro-level research needs to be undertaken that might help us understand climate change impacts on the landscape i.e. biodiversity, health, natural resource management, land use and land cover development, adaptation and the development of socio-ecological systems. The concepts presented in this article should provide the basis for a discussion on decision-making issues among multidisciplinary experts with regard to climate change and sustainable development within complex environments.展开更多
BACKGROUND:Since demographic changes have contributed to the growth of emergency medicine,a highly populous nation such as India needs to give physicians associated due credit and recognition.The management of knowled...BACKGROUND:Since demographic changes have contributed to the growth of emergency medicine,a highly populous nation such as India needs to give physicians associated due credit and recognition.The management of knowledge source must also be conducted with due care as the work environment is completely different from that of any other clinicians.METHODS:The data were collected by direct interaction with residents of the department.Additional information was gathered by observation.The data were verified for validity.RESULTS:This study was to bring out the benefits of proactive decisions that could further enhance the emergency department.But such decisions did not always result in positive responses and improved morale.When such decisions were retracted as it causes misalignment with the existing system.An academic emergency department was expected and physicians should enrich their knowledge about emergency medicine.CONCLUSIONS:The problems faced by emergency department might be similar but the way in which one tackles the situation would be different.Decision making in this hospital may not be the best but it would've been the optimum one given the conditions available.展开更多
文摘An energy production system consisting of a solar collector, biogas dry reforming reactor and solid oxide fuel cell (SOFC) was assumed to be installed in Kolkata, India. This study aims to understand the impact of climate conditions on the performance of solar collectors with different lengths of parabolic trough solar collector (dx) and mass flow rate of heat transfer fluid (m). In addition, this study has evaluated the amount of H2 produced by biogas dry reforming (GH2), the amount of power generated by SOFC (PSOFC) and the maximum number of possible households (N) whose electricity demand could be met by the energy system proposed, considering the performance of solar collector with the different dx and m. As a result, the optimum dx was found to be 4 m. This study revealed that the temperature of heat transfer fluid (Tfb) decreased with the increase in m. Tfb in March, April and May was higher than that in other months, while Tfb from June to December was the lowest. GH2, PSOFC and N in March, April and May were higher than those in other months, irrespective of m. The optimum m was 0.030 kg/s.
文摘Utility of geochemistry in mineral exploration is known since more than half-a-century.In reconnaissance diamond exploration,regolith geochemistry is a well known tool worldwide and helps in distinguishing bedrock
文摘A numerous studies have been done on climate change at regional, national and global levels. Several climate models have predicted the global scenarios for climate in different parts of the world. However, the significance and practical implementation of such models at local level yet to be validated. This is because those national or global models do not consider micro variables such as such as environmental resources for example ‘land availability, local climatic conditions, socioeconomic factors such as ‘labour and capital’, policy aspects such as ‘subsidies, nature conservation strategies’ and competition for labor and capital in relation of ‘national economy’. India, with a huge diversity in land, topography, climate and socioeconomic conditions, divided into 15 agro-ecological zones. Further, to help develop location specific research and development strategies at the micro level, a total of 127 sub-zones (agro-climatic sub regions) have been identified in India. Therefore, research on climate change and its impact only at the regional or national level may not be a sound approach to provide solutions for adaptation to climate change at micro level. Thus the micro-level research needs to be undertaken that might help us understand climate change impacts on the landscape i.e. biodiversity, health, natural resource management, land use and land cover development, adaptation and the development of socio-ecological systems. The concepts presented in this article should provide the basis for a discussion on decision-making issues among multidisciplinary experts with regard to climate change and sustainable development within complex environments.
文摘BACKGROUND:Since demographic changes have contributed to the growth of emergency medicine,a highly populous nation such as India needs to give physicians associated due credit and recognition.The management of knowledge source must also be conducted with due care as the work environment is completely different from that of any other clinicians.METHODS:The data were collected by direct interaction with residents of the department.Additional information was gathered by observation.The data were verified for validity.RESULTS:This study was to bring out the benefits of proactive decisions that could further enhance the emergency department.But such decisions did not always result in positive responses and improved morale.When such decisions were retracted as it causes misalignment with the existing system.An academic emergency department was expected and physicians should enrich their knowledge about emergency medicine.CONCLUSIONS:The problems faced by emergency department might be similar but the way in which one tackles the situation would be different.Decision making in this hospital may not be the best but it would've been the optimum one given the conditions available.
