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ReHS를 이용한 상수관망 최적개량 의사결정 시스템의 개발
백천우,김응석,박무종,김중훈 한국수자원학회 2005 한국수자원학회논문집 Vol.38 No.3
노후관망의 최적개량 계획수립 시에는 수리학적 타당성을 포함한 다양한 인자들이 복합적으로 고려되어야 하며 모형에 고려할 인자들이 증가할수록 보다 효율적인 최적화 기법의 적용이 필요할 것이다. 그러나, 국내에서는 유전자알고리즘과 같은 보다 효과적인 알고리즘을 이용한 노후관 개량을 위한 의사결정시스템에 대한 연구가 미비한 실정이다. 본 연구의 목적은 최근 국내에서 제안된 ReHS라는 최적화기법을 이용해 기존의 모형에서 고려하지 않은 다양한 인자들을 고려한 상 The study on the plan for rehabilitation project of domestic water distribution system - especially using Heuristic Algorithm as Genetic Algorithm which is expected to provide a more optimal solution effectively - has not been done sufficiently. The purpo
A new approach to design of RF energy harvesting system to enslave wireless sensor networks
Alex Mouapi,Nadir Hakem,Gilles Y. Delisle 한국통신학회 2018 ICT Express Vol.4 No.4
In trying to reach the goal of controlling the environment, recent years have seen the rapid emergence of Wireless Sensors Networks (WSN). Nevertheless, the lifetime of sensor nodes shows a strong dependence on battery capacity. Recently energy harvesting techniques have been considered to allow the use of WSN in the ”deploy and forget” mode. This paper proposes an assessment of the performance of a WSN enslaved to an optimized Radiofrequency Energy Harvesting System (REHS). The energy budget of a sensor node in a Low-Energy Adaptive Clustering Hierarchy (LEACH) protocol is quantified and used to evaluate the performance of the WSN.
Leaching of rare earth metals (REMs) from Korean monazite concentrate
Panda, R.,Kumari, A.,Jha, M.K.,Hait, J.,Kumar, V.,Rajesh Kumar, J.,Lee, J.Y. Korean Society of Industrial and Engineering Chemi 2014 Journal of industrial and engineering chemistry Vol.20 No.4
Systematic scientific studies for dephosphorization and acid leaching of Korean monazite are reported here. 50% NaOH (w/v) solubilizes 99.99% phosphate, at 170<SUP>o</SUP>C, 100g/L pulp density in 4h. Kinetics of phosphate leaching fitted well with model ''chemical reaction control,'' i.e. 1-(1-X)<SUP>½</SUP>=k<SUB>c</SUB>t, E<SUB>a</SUB>=58.04kJ/mol. Further, rare earth hydroxides (REHs) was leached using 6N HCl at 90<SUP>o</SUP>C, 60g/L pulp density for 2h to recover ~95% REMs. Leach liquor generated can be further processed using solvent extraction/ion exchange techniques. From the pure solutions, metal/salts could be obtained using evaporation, precipitation, etc.
Leaching of rare earth metals (REMs) from Korean monazite concentrate
Rekha Panda,Manis Kumar Jha,이진영,Archana Kumari,Jhumki Hait,Vinay Kumar,J. Rajesh Kumar 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
Systematic scientific studies for dephosphorization and acid leaching of Korean monazite are reported here. 50% NaOH (w/v) solubilizes 99.99% phosphate, at 170 ℃, 100 g/L pulp density in 4 h. Kinetics of phosphate leaching fitted well with model ‘‘chemical reaction control,’’ i.e. 1 - (1 - X)1/2 = kct, Ea = 58.04 kJ/mol. Further, rare earth hydroxides (REHs) was leached using 6 N HCl at 90 ℃, 60 g/L pulp density for 2 h to recover ~95% REMs. Leach liquor generated can be further processed using solvent extraction/ion exchange techniques. From the pure solutions, metal/salts could be obtained using evaporation, precipitation, etc.
Curcumin Induces Apoptosis in Pre-B Acute Lymphoblastic Leukemia Cell Lines Via PARP-1 Cleavage
Mishra, Deepshikha,Singh, Sunita,Narayan, Gopeshwar Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.8
Curcumin, a polyphenolic compound isolated from the rhizomes of an herbaceous perennial plant, Curcuma longa, is known to possess anticancerous activity. However, the mechanism of apoptosis induction in cancers differs. In this study, we have (1) investigated the anticancerous activity of curcumin on REH and RS4;11 leukemia cells and (2) studied the chemo-sensitizing potential of curcumin for doxorubicin, a drug presently used for leukemia treatment. It was found that curcumin induced a dose dependent decrease in cell viability because of apoptosis induction as visualized by annexin V-FITC/ PI staining. Curcumin-induced apoptosis of leukemia cells was mediated by PARP-1 cleavage. An increased level of caspase-3, apoptosis inducing factor (AIF), cleaved PARP-1 and decreased level of Bcl2 was observed in leukemia cells after 24h of curcumin treatment. In addition, curcumin at doses lower than the $IC_{50}$ value significantly enhanced doxorubicin induced cell death. Therefore, we conclude that curcumin induces apoptosis in leukemia cells via PARP-1 mediated caspase-3 dependent pathway and further may act as a potential chemo-sensitizing agent for doxorubicin. Our study highlights the chemo-preventive and chemo-sensitizing role of curcumin.