Malaria is still a serious cases all over the world especially in tropical country with a predict number 300-500 millions people infected per year. The resistence cases of these anti-malaria substance make a new effort to find the new strategy against malaria. This study aim to summarize the potential Piper genus as the source of potential antimalarial compound and recent research of callus induction in piper plant to obtain metabolites.The study of Piper genus represent the 11 Piper species were chemically studied and assayed against the plasmodium. The potential antimalarial compound isolates from several Piper genus were 20,60-Dihydroxy-40-methoxydihydro-chalcone,3-Farnesyl-p-hydroxybenzoic acid, Piperine, Chabamide, Benzoic acid derivatives, Guineensine, pellitorine, brachystamide B, sarmentine, and sermentosine, 5,8-Hydroxy-7-methoxyflavone, Prenylated hydroxybenzoic acid, 4-Nerolidylcatechol, Piperitone, Champor, and Viridiflorol (EO). An effort to propagate necessary antiplasmodial resources especially by callus induction has been conducted for 7 Piper species such as Piper betle, P. colubrinumm, P. crocatum, P. longum, P. nigrum, P. permucronatum and P. solmsianum to obtain higher content of secondary metabolites with a different plant growth hormone (PGR) supplementation while there are most of Piper genus have not been well studied. It conclude that callus culture could be the promising method to obtain antimalarial secondary metabolites as antimalarial.
疟疾仍然是全世界特别是热带国家的一个严重病例，预计每年有3 -5亿人感染。这些抗疟药物的耐药病例为寻找抗疟新策略做出了新的努力。本文旨在综述胡椒属潜在的抗疟化合物来源以及胡椒植物愈伤组织诱导获得代谢产物的最新研究进展。对11种胡椒属进行了化学研究，并测定了其对疟原虫的抗性。从胡椒属中分离到的潜在抗疟化合物有:20,60-二羟基-40-甲氧基二氢查尔酮、3-法尼基对羟基苯甲酸、胡椒碱、Chabamide、苯甲酸衍生物、几内亚碱、pelitorine、短叶胺B、沙门汀和血清托辛、5,8-羟基-7-甲氧基黄酮、戊酰化羟基苯甲酸、4-Nerolidylcatechol、胡椒酮、Champor和Viridiflorol (EO)。为了获得较高的次生代谢物含量，我们对7种辣椒(Piper betle, P. colubrinum, P. crocatum, P. longum, P. nigrum, P. permucronatum和P. solmsium)进行了愈伤组织诱导繁殖，特别是通过添加不同的植物生长激素(plant growth hormone, PGR)来获得必要的抗疟原虫资源，而大部分辣椒属植物的次生代谢物含量还没有得到很好的研究。结果表明，愈伤组织培养可能是获得抗疟次级代谢物的有效方法。
{"title":"CALLUS CULTURE AS THE METHOD IN PROVIDING ANTIMALARIAL COMPOUNDS OF PIPER GENUS","authors":"Nola Suryani Putri, Z. A. Noli","doi":"10.3107/JESSS.10.PP03","DOIUrl":"https://doi.org/10.3107/JESSS.10.PP03","url":null,"abstract":"Malaria is still a serious cases all over the world especially in tropical country with a predict number 300-500 millions people infected per year. The resistence cases of these anti-malaria substance make a new effort to find the new strategy against malaria. This study aim to summarize the potential Piper genus as the source of potential antimalarial compound and recent research of callus induction in piper plant to obtain metabolites.The study of Piper genus represent the 11 Piper species were chemically studied and assayed against the plasmodium. The potential antimalarial compound isolates from several Piper genus were 20,60-Dihydroxy-40-methoxydihydro-chalcone,3-Farnesyl-p-hydroxybenzoic acid, Piperine, Chabamide, Benzoic acid derivatives, Guineensine, pellitorine, brachystamide B, sarmentine, and sermentosine, 5,8-Hydroxy-7-methoxyflavone, Prenylated hydroxybenzoic acid, 4-Nerolidylcatechol, Piperitone, Champor, and Viridiflorol (EO). An effort to propagate necessary antiplasmodial resources especially by callus induction has been conducted for 7 Piper species such as Piper betle, P. colubrinumm, P. crocatum, P. longum, P. nigrum, P. permucronatum and P. solmsianum to obtain higher content of secondary metabolites with a different plant growth hormone (PGR) supplementation while there are most of Piper genus have not been well studied. It conclude that callus culture could be the promising method to obtain antimalarial secondary metabolites as antimalarial.","PeriodicalId":285932,"journal":{"name":"Journal of Environmental Science for Sustainable Society","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133690452","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}
Wastewater-contaminated soil is noticed in many residential and industrial districts in various countries in the world. Domestic and industrial wastewater contains many injurious chemical compositions. Many underground septic tanks have been used to collect domestic wastewater from dwelling buildings in Tahta city, Egypt. Soil samples were taken at the depth of foundation level of the buildings and a series of mineralogical and chemical analysis was carried out for contaminated soil samples. Also, physical engineering properties of soil were identified and analyzed at different periods of wastewater exposure time and at variant distances from the contamination source (septic tank). Results showed significant adverse effects of the contaminated soil on mineralogical, chemical and physical properties.
{"title":"PHYSICAL PROPERTIES OF WASTEWATER CONTAMINATED UNDERLYING CLAYEY SOIL","authors":"Al Easa, T. Hanamura","doi":"10.3107/JESSS.3.9","DOIUrl":"https://doi.org/10.3107/JESSS.3.9","url":null,"abstract":"Wastewater-contaminated soil is noticed in many residential and industrial districts in various countries in the world. Domestic and industrial wastewater contains many injurious chemical compositions. Many underground septic tanks have been used to collect domestic wastewater from dwelling buildings in Tahta city, Egypt. Soil samples were taken at the depth of foundation level of the buildings and a series of mineralogical and chemical analysis was carried out for contaminated soil samples. Also, physical engineering properties of soil were identified and analyzed at different periods of wastewater exposure time and at variant distances from the contamination source (septic tank). Results showed significant adverse effects of the contaminated soil on mineralogical, chemical and physical properties.","PeriodicalId":285932,"journal":{"name":"Journal of Environmental Science for Sustainable Society","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129466090","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}
Mai Chau Nhat Anh, Chau Lan Anh, N. Thạnh, Le Than Toan
{"title":"EFFICACY OF BENEFICIAL Penicillium sp. ON BIO-CONTROLLING SEVERITY AND DEFENCE ENZYME PHENYLALANINE AMMONIA-LYASE AGAINST LEAF BLIGHT DISEASE ON GREEN ONION PLANTS","authors":"Mai Chau Nhat Anh, Chau Lan Anh, N. Thạnh, Le Than Toan","doi":"10.3107/jesss.11.pp04","DOIUrl":"https://doi.org/10.3107/jesss.11.pp04","url":null,"abstract":"","PeriodicalId":285932,"journal":{"name":"Journal of Environmental Science for Sustainable Society","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120976462","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}
Dramatic changes in climatic conditions have precipitated increases in the severity and frequency with which saltwater intrusions occur in Vietnam’s Mekong Delta. These intrusions threaten agricultural sustainability and rural livelihoods. Little research has explored how rural farmers perceive this threat, and what factors influence them to change farming practices to adapt to the altered environment. This study attempts to understand how rice farmers in Soc Trang province perceive and respond to saltwater intrusions. This geographical area is a main agricultural region in Vietnam’s Mekong Delta. Data were obtained from interviews with 80 rice farmers and four key agricultural officers in two districts of Soc Trang province. Results found that farmers are becoming aware of the relationship between climate change and saltwater intrusions, and that this awareness is significantly influenced by educational levels and numerous sources of both informal and formal information. In addition, characteristics related to a farm’s location, including its access to water sources, when combined with access to information, appeared likely to influence Soc Trang farmers’ risk perceptions. Individual farmers have responded to the now-irregular and intensifying saltwater intrusions by implementing both intentional and unintentional adaptations. Further, significant differences were observed between local adaptation strategies in various geographical locations at the district level. The absence of a strong correlation between Soc Trang rice farmers’ perceptions of risks and their decisions to implement adaptive responses was also observed. This suggests that having knowledge of a threat is not sufficient to motivate individuals to take steps to mitigate it.
{"title":"CLIMATE CHANGE IN VIETNAM’S MEKONG DELTA: SOC TRANG RICE FARMERS’ PERCEPTIONS AND ADAPTIVE BEHAVIORS","authors":"Thanh Tam Ho, Fumikazu Ubukata","doi":"10.3107/JESSS.8.1","DOIUrl":"https://doi.org/10.3107/JESSS.8.1","url":null,"abstract":"Dramatic changes in climatic conditions have precipitated increases in the severity and frequency with which saltwater intrusions occur in Vietnam’s Mekong Delta. These intrusions threaten agricultural sustainability and rural livelihoods. Little research has explored how rural farmers perceive this threat, and what factors influence them to change farming practices to adapt to the altered environment. This study attempts to understand how rice farmers in Soc Trang province perceive and respond to saltwater intrusions. This geographical area is a main agricultural region in Vietnam’s Mekong Delta. Data were obtained from interviews with 80 rice farmers and four key agricultural officers in two districts of Soc Trang province. Results found that farmers are becoming aware of the relationship between climate change and saltwater intrusions, and that this awareness is significantly influenced by educational levels and numerous sources of both informal and formal information. In addition, characteristics related to a farm’s location, including its access to water sources, when combined with access to information, appeared likely to influence Soc Trang farmers’ risk perceptions. Individual farmers have responded to the now-irregular and intensifying saltwater intrusions by implementing both intentional and unintentional adaptations. Further, significant differences were observed between local adaptation strategies in various geographical locations at the district level. The absence of a strong correlation between Soc Trang rice farmers’ perceptions of risks and their decisions to implement adaptive responses was also observed. This suggests that having knowledge of a threat is not sufficient to motivate individuals to take steps to mitigate it.","PeriodicalId":285932,"journal":{"name":"Journal of Environmental Science for Sustainable Society","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124571159","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 Seto Inland Sea is an appropriate place for offshore wind power generation due to its features of vast shallow waters, numerous islands, calm ocean waves, steady breeze circulation and so on. In this study, offshore wind energy potential in the Seto Inland Sea is estimated based on the wind prediction data of LAWEPS, and the sea areas appropriate for offshore wind power generation are extracted by means of GIS analysis considering the constrained conditions such as wind speed, water depth, natural parks and ship lanes. The results of the estimation show that the maximum annual power generation is 247 TWh and the minimum is 32 TWh. In particular, the Suo-Nada area near the Kanmon Channel seems to be highly promising as the offshore wind power generation site.
{"title":"OFFSHORE WIND POWER POTENTIALS IN THE SETO INLAND SEA","authors":"S. Hiejima, Yuuichi Hiyoshi","doi":"10.3107/JESSS.3.35","DOIUrl":"https://doi.org/10.3107/JESSS.3.35","url":null,"abstract":"The Seto Inland Sea is an appropriate place for offshore wind power generation due to its features of vast shallow waters, numerous islands, calm ocean waves, steady breeze circulation and so on. In this study, offshore wind energy potential in the Seto Inland Sea is estimated based on the wind prediction data of LAWEPS, and the sea areas appropriate for offshore wind power generation are extracted by means of GIS analysis considering the constrained conditions such as wind speed, water depth, natural parks and ship lanes. The results of the estimation show that the maximum annual power generation is 247 TWh and the minimum is 32 TWh. In particular, the Suo-Nada area near the Kanmon Channel seems to be highly promising as the offshore wind power generation site.","PeriodicalId":285932,"journal":{"name":"Journal of Environmental Science for Sustainable Society","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125011026","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 disposal of large amounts of sludge, deposited in many farm/irrigation ponds in Japan, has recently become an important task to be resolved. To dredge sludge helps to maintain the capacity of the ponds and the quality of the water in the pond. In other words, it is vital that the deposited sludge should be effectively dredged. Since the water content of dredged sludge is very high, it must be reduced to enable the transport and the reuse of the sludge. The authors of the present paper have developed a procedure to dehydrate in-situ dredged sludge from farm ponds using a compact filter press machine. The purpose of this study is to investigate appropriate conditions for the efficient dehydration of dredged sludge with a compact filter press machine. Since the dehydration mechanism inside the filter press machine is based on the hydraulic consolidation, hydraulic consolidation tests are conducted to simulate the filter press consolidation in order to clarify the relationship between the conditions of the filter press dehydration and the water content of the consolidated sludge. Results of the tests show that the most important factor in controlling the efficiency of the actual filter press dehydration process is the thickness of the filtration chamber of the filter press machine. Sludge is expected to be more effectively dehydrated when a filtration chamber with a smaller thickness is adopted.
{"title":"EXPERIMENTAL STUDY ON THE EFFICIENT DEHYDRATION OF DREDGED SLUDGE WITH A COMPACT FILTER PRESS","authors":"T. Takisawa, A. Murakami, S. Nishimura","doi":"10.3107/JESSS.2.21","DOIUrl":"https://doi.org/10.3107/JESSS.2.21","url":null,"abstract":"The disposal of large amounts of sludge, deposited in many farm/irrigation ponds in Japan, has recently become an important task to be resolved. To dredge sludge helps to maintain the capacity of the ponds and the quality of the water in the pond. In other words, it is vital that the deposited sludge should be effectively dredged. Since the water content of dredged sludge is very high, it must be reduced to enable the transport and the reuse of the sludge. The authors of the present paper have developed a procedure to dehydrate in-situ dredged sludge from farm ponds using a compact filter press machine. The purpose of this study is to investigate appropriate conditions for the efficient dehydration of dredged sludge with a compact filter press machine. Since the dehydration mechanism inside the filter press machine is based on the hydraulic consolidation, hydraulic consolidation tests are conducted to simulate the filter press consolidation in order to clarify the relationship between the conditions of the filter press dehydration and the water content of the consolidated sludge. Results of the tests show that the most important factor in controlling the efficiency of the actual filter press dehydration process is the thickness of the filtration chamber of the filter press machine. Sludge is expected to be more effectively dehydrated when a filtration chamber with a smaller thickness is adopted.","PeriodicalId":285932,"journal":{"name":"Journal of Environmental Science for Sustainable Society","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131003197","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}
Dissolved organic matter (DOM) plays an important role in natural aquatic ecosystems. Fluorescence and UV absorption of chromophoric dissolved organic matter (CDOM) in the Yangtze (Changjiang River) estuary are reported in this study. Water samples were collected mainly from three sections (North Channel, the head of South Channel and the end of South Channel) of the Yangtze Estuary in March, 2006. Three-dimensional excitation emission matrix (3-DEEM) fluorescence spectrums and UV absorption at 355 nm are analyzed for those filtrates through Whatman GF/F filters. The concentrations of dissolved organic carbon (DOC) are also measured. The results showed that absorption coefficients of CDOM at 355 nm, which ranged from 16.4 m-1 to 18.3 m-1, had significant correlations with the concentrations of DOC (2.0∼3.4 mg/L) at high tide and only in bottom water at low tide. The 3DEEM fluorescence scans suggested the terrestrial fluorophores of aromatic protein (peak A: Ex=236±1 nm, Em=364±3 nm), humic acid-like (peak B: Ex=251±3 nm, Em=473±5 nm) are obvious. Another peak of humic acid-like (peak D: Ex=337±6 nm, Em=447±9 nm) is also found. Tryptophan and protein-like (peak C: Ex=282±2 nm, Em=351±5 nm) with strong peaks, which could be derived from both terrestrial and microbial origins, were detected only in South Channel. In addition, the intensities of peak C are stronger at river end member than at marine end member (here is a low salinity area). The higher fluorescence index (FI) values at river end member could be resulted by microbially derived CDOM in the Huangpu River and wastewater discharges from Shanghai. The fluorescence index suggested that the terrestrial signal became stronger at marine end member but microbial signal became weaker, which could be attributed to the mobilization of particulate organic matter (POM) in the riverine suspended sediments with the intrusion of the seawater and the suspension of the sediments. The saltwater intrusion could also increase the contents of microbial CDOM during flooding tide. Therefore, there is autochthonous production of CDOM occurring within the estuary, where chromophoric dissolved organic matter is dominated by mainly terrestrial and microbial sources.
{"title":"CHRACTERIZATION OF CHROMOPHORIC DISSOLVED ORGANIC MATTER IN THE YANGTZE ESTUARY BY ABSORPTION AND FLUORESCENCE SPECTROSCOPY","authors":"Fan Yang, Qinghui Huang, Jianhua Li, Xiaomin Zhu","doi":"10.3107/JESSS.1.55","DOIUrl":"https://doi.org/10.3107/JESSS.1.55","url":null,"abstract":"Dissolved organic matter (DOM) plays an important role in natural aquatic ecosystems. Fluorescence and UV absorption of chromophoric dissolved organic matter (CDOM) in the Yangtze (Changjiang River) estuary are reported in this study. Water samples were collected mainly from three sections (North Channel, the head of South Channel and the end of South Channel) of the Yangtze Estuary in March, 2006. Three-dimensional excitation emission matrix (3-DEEM) fluorescence spectrums and UV absorption at 355 nm are analyzed for those filtrates through Whatman GF/F filters. The concentrations of dissolved organic carbon (DOC) are also measured. The results showed that absorption coefficients of CDOM at 355 nm, which ranged from 16.4 m-1 to 18.3 m-1, had significant correlations with the concentrations of DOC (2.0∼3.4 mg/L) at high tide and only in bottom water at low tide. The 3DEEM fluorescence scans suggested the terrestrial fluorophores of aromatic protein (peak A: Ex=236±1 nm, Em=364±3 nm), humic acid-like (peak B: Ex=251±3 nm, Em=473±5 nm) are obvious. Another peak of humic acid-like (peak D: Ex=337±6 nm, Em=447±9 nm) is also found. Tryptophan and protein-like (peak C: Ex=282±2 nm, Em=351±5 nm) with strong peaks, which could be derived from both terrestrial and microbial origins, were detected only in South Channel. In addition, the intensities of peak C are stronger at river end member than at marine end member (here is a low salinity area). The higher fluorescence index (FI) values at river end member could be resulted by microbially derived CDOM in the Huangpu River and wastewater discharges from Shanghai. The fluorescence index suggested that the terrestrial signal became stronger at marine end member but microbial signal became weaker, which could be attributed to the mobilization of particulate organic matter (POM) in the riverine suspended sediments with the intrusion of the seawater and the suspension of the sediments. The saltwater intrusion could also increase the contents of microbial CDOM during flooding tide. Therefore, there is autochthonous production of CDOM occurring within the estuary, where chromophoric dissolved organic matter is dominated by mainly terrestrial and microbial sources.","PeriodicalId":285932,"journal":{"name":"Journal of Environmental Science for Sustainable Society","volume":"111 26","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131914151","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}
N. Watanabe, Thomas Schnicke, Wenqing Wang, T. Wieser, O. Kolditz
This paper focuses on the computational efficiency of parallelized finite element method (FEM) for coupled thermo-hydro-mechanical (THM) problems. The numerical analysis of THM coupled problems in porous media is an important subject for many geo-engineering tasks such as engineering of geothermal reservoirs, nuclear waste management and CO2 sequestration. However its calculation is computationally very expensive. Improvement of the computation time is required to expand applicability of the method. Parallel computing is one of the ways to provide it speed-up. In this study, parallelization efficiency on solving the coupled THM problems is presented with several simple tests as well as an application to a three dimensional geothermal reservoir modeling. Tests were conducted using a parallelized FEM code, GeoSys/Rockflow, and a Linux cluster system, LiClus at UFZ. Results show that the parallel computation scheme effectively reduces the calculation time for solving coupled THM problems. It was also found that its parallelization could affect solver behavior. Reducing communication time between cluster nodes is desired to use parallel computing more efficiently.
本文重点研究了热-水-力耦合问题并行化有限元法的计算效率。多孔介质中THM耦合问题的数值分析是地热储层工程、核废料管理和CO2封存等许多地球工程任务的重要内容。然而它的计算在计算上是非常昂贵的。为了扩大该方法的适用性，需要改进计算时间。并行计算是提供它加速的方法之一。本研究通过几个简单的测试，并在三维地热储层建模中应用，证明了并行化求解耦合THM问题的效率。测试使用并行FEM代码GeoSys/Rockflow和Linux集群系统LiClus at UFZ进行。结果表明，该并行计算方案有效地减少了求解耦合THM问题的计算时间。还发现其并行化会影响求解器的行为。为了更有效地使用并行计算，需要减少集群节点之间的通信时间。
{"title":"ANALYSIS OF PARALLELIZATION EFFICIENCY OF COUPLED THERMO-HYDRO-MECHANICAL SIMULATION","authors":"N. Watanabe, Thomas Schnicke, Wenqing Wang, T. Wieser, O. Kolditz","doi":"10.3107/JESSS.3.50","DOIUrl":"https://doi.org/10.3107/JESSS.3.50","url":null,"abstract":"This paper focuses on the computational efficiency of parallelized finite element method (FEM) for coupled thermo-hydro-mechanical (THM) problems. The numerical analysis of THM coupled problems in porous media is an important subject for many geo-engineering tasks such as engineering of geothermal reservoirs, nuclear waste management and CO2 sequestration. However its calculation is computationally very expensive. Improvement of the computation time is required to expand applicability of the method. Parallel computing is one of the ways to provide it speed-up. In this study, parallelization efficiency on solving the coupled THM problems is presented with several simple tests as well as an application to a three dimensional geothermal reservoir modeling. Tests were conducted using a parallelized FEM code, GeoSys/Rockflow, and a Linux cluster system, LiClus at UFZ. Results show that the parallel computation scheme effectively reduces the calculation time for solving coupled THM problems. It was also found that its parallelization could affect solver behavior. Reducing communication time between cluster nodes is desired to use parallel computing more efficiently.","PeriodicalId":285932,"journal":{"name":"Journal of Environmental Science for Sustainable Society","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125421047","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}
This study is intended to use statistical methods for analyses of how a final waste disposal influences its surrounding environment. The influence is investigated from the viewpoint of birds around the final waste disposal site and vicinity. We observed the ecology of birds using a strip transect sampling. The bird data were classified according to cluster analysis and analyzed using principal component analysis. We newly defined a measure of plant community similar to the vegetation authenticity based on principal component space. We also compared the time series with variations of the observation area.
{"title":"STATISTICAL ANALYSIS OF THE BIRDS DATA AROUND THE FINAL WASTE DISPOSAL SITE","authors":"M. Oda, K. Kurihara","doi":"10.3107/JESSS.3.1","DOIUrl":"https://doi.org/10.3107/JESSS.3.1","url":null,"abstract":"This study is intended to use statistical methods for analyses of how a final waste disposal influences its surrounding environment. The influence is investigated from the viewpoint of birds around the final waste disposal site and vicinity. We observed the ecology of birds using a strip transect sampling. The bird data were classified according to cluster analysis and analyzed using principal component analysis. We newly defined a measure of plant community similar to the vegetation authenticity based on principal component space. We also compared the time series with variations of the observation area.","PeriodicalId":285932,"journal":{"name":"Journal of Environmental Science for Sustainable Society","volume":"173 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123256704","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}
Songtao Dang, J. Kawasaki, L. Abella, J. Auresenia, H. Habaki, P. Gaspillo, Q. N. Vu
This work aims to investigate the removal of arsenic from the simulated groundwater by batch adsorption using Iron (ZVI) and Iron[III] Oxide (IO). The effect of initial arsenic concentration, adsorbent dose and pH were investigated. Adsorption equilibrium and its kinetics were also studied. The results showed that both ZVI and IO have a high efficiency for adsorption of arsenic from groundwater. Langmuir isotherm described well the adsorption equilibrium and the pseudo-second order kinetic model gave the best fit with the experimental kinetic data for both ZVI and IO.
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