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( Jesmin Akhter ),( Md. Imdadul Islam ),( M. R. Amin ) 한국정보처리학회 2014 Journal of information processing systems Vol.10 No.4
To enhance the utilization of the traffic channels of a network (instead of allocating radio channel to an individual user), a channel or a group of channels are allocated to a user group. The idea behind this is the statistical distribution of traffic arrival rates and the service time for an individual user or a group of users. In this paper, we derive the blocking probability and throughput of a subscriber station of Worldwide Interoperability for Microwave Access (WiMAX) by considering both the connection level and packet-level traffic under a complete partition scheme. The main contribution of the paper is to incorporate the traffic shaping scheme onto the incoming turbulent traffic. Hence, we have also analyzed the impact of the drain rate of the buffer on the blocking probability and throughput.
폐광산 퇴적물 중금속 평가를 위한 새로운 통합 공해지수
( Jesmin Akter ),장주원 ( Jang Juwon ),준태성 ( Jun Taesung ),김정규 ( Kim Jeong Gyu ),이호식 ( Hosik Lee ) 한국물환경학회 2020 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2020 No.-
This study amis is to establish a new integrated pollution index (IPI) to assess the contamination of heavy metals in abandoned mines. Also, the classification of major polluted mine areas is carried out by the new IPI. The pollution index was calculated from a weighted ratio of site survey (SI), soil pollution index (PI<sub>s</sub>) and water pollution index (PI<sub>w</sub>). Moreover, the sediment pollution index (SP<sub>index</sub>) was assessed for three indices, heavy metal pollution load (PL<sup>N</sup>), ecological risk (RI<sup>N</sup>) and geoaccumulation risk index (sI<sup>N</sup> <sub>geo</sub>). The Metal Pollution Index (MPI) has been calculated to enable the present metal (As, Cd, Cu, Ni, Pb, Zn, Hg, Cr) concentrations of sediment as a single value. Therefore, a highly contaminated sediment index is the most polluted mine sites although the pollution index of soil and water also significant for waste mines has shown. In this study mainly focused on IPI for sediment pollution index along with water and soil pollution index. Meanwhile, sediments are the final pathway of both natural and anthropogenic components produced or derived from the environment. Sediment quality is a good indicator of pollution in the water, where heavy metals and other organic pollutants tend to concentrate. Continuous pollutant discharge from abandoned mines increases the risk of heavy metals contamination and accumulation of sediments can cause long term environmental pollution and ecosystem disturbance. According to this study, the IPI provides the measurement of most polluted mine sites based on their pollutant levels which becomes more convenient to conduct prioritize surveys and evaluation methods of environmental contamination.
생물담체 공정을 기반으로 한 생물학적 질소 제거의 기술 개발 동향: 리뷰
( Jesmin Akter ),( Hiyaw Hatiya Ware ),이재엽 ( Jae-yeop Lee ),김일호 ( Ilho Kim ) 한국물환경학회 2020 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2020 No.-
This review paper summarizes biological nitrogen removal based on the bio-media filtration process. Biological filtration using the bio-media filtration technique that utilizes biological micro-organisms to remove nutrients from the wastewater. The main two strategies for the removal of nitrogen from domestic wastewater are nitrification and denitrification. Nitrification is carried out in two steps. First, ammonia (NH3) is converted to nitrite (NO2 -) by ammonia-oxidizing bacteria (AOB) and the second step, nitrite-oxidizing bacteria (NOB) convert nitrite to nitrate (NO3 -). Denitrification is an anoxic process whereby NO3 - is converted to nitrogen gas (N2) by heterotrophic microorganisms using a carbon source as the electron donor. In domestic wastewater, nitrogen originates from waste products of the human body and other organic waste materials. Because eutrophication and nitrate is a risk to human health, the removal of nitrogen from wastewater has become a worldwide concern. A recent study has been shown that various bio-media efficiently used for nitrification and denitrification process, also the growth of biofilm is the potential for ammonia removal. Therefore, the specific surface area of bio-media is available for bio-film growth depends on media types and texture influenced nitrification. The objective of this paper is to describe the bio media treatment process in the biological treatment system for sustainable development in the nitrogen removal process.
Jesmin Ara,Johny Bajgai,Ma. Easter Joy Sajo,Ailyn Fadriquela,Cheol-Su Kim,Soo-Ki Kim,Kyu-Jae Lee 대한독성 유전단백체 학회 2019 Molecular & cellular toxicology Vol.15 No.2
Backgrounds: While non-thermal plasma aided water (NTP-AW) has been currently used as a novel therapeutic against wide array of diseases, it remains unknown on therapeutic effect against atopic dermatitis (AD). To answer this, we evaluated the effect of NTP-AW on the regulation of immune and antioxidant markers in dinitrochlorobenzene (DNCB)-induced AD in hairless mice. Methods: The skin damage in mice was induced by 1% DNCB for the first wk and 0.5% every alternate day for 3 wks followed by 4 wks NTP-AW treatment through spraying and bathing method. Results: Treatment with NTP-AW reduced the severity of dermatitis symptoms and skin scratching behavior. In line, immunological profiling showed the improved parameters such as decrease in the number of neutrophils, lymphocyte, eosinophil as well as Th2-mediated IgE overproduction, and the reduced level of pro-inflammatory cytokine such as interleukin (IL)-1β, and tumor necrosis factor (TNF)-α. Redox profiling showed that NTP-AW reduced the production of total reactive oxygen species (ROS), and enhanced the antioxidant enzyme activity. Conclusion: Collectively, this study clearly indicates the therapeutic effect of NTP-AW on DNCB-induced AD in hairless mice via immuno-redox regulation, clinically implying that NTP-AW treatment might be a safe and promising therapeutic candidate against AD.
폐광산 퇴적물 중금속 평가를 위한 새로운 통합 공해지수
( Jesmin Akter ),장주원 ( Jang Juwon ),준태성 ( Jun Taesung ),김정규 ( Kim Jeong Gyu ),이호식 ( Hosik Lee ) 한국물환경학회 2020 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2020 No.-
This study amis is to establish a new integrated pollution index (IPI) to assess the contamination of heavy metals in abandoned mines. Also, the classification of major polluted mine areas is carried out by the new IPI. The pollution index was calculated from a weighted ratio of site survey (SI), soil pollution index (PI<sub>s</sub>) and water pollution index (PI<sub>w</sub>). Moreover, the sediment pollution index (SP<sub>index</sub>) was assessed for three indices, heavy metal pollution load (PL<sup>N</sup>), ecological risk (RI<sup>N</sup>) and geoaccumulation risk index (sI<sup>N</sup> <sub>geo</sub>). The Metal Pollution Index (MPI) has been calculated to enable the present metal (As, Cd, Cu, Ni, Pb, Zn, Hg, Cr) concentrations of sediment as a single value. Therefore, a highly contaminated sediment index is the most polluted mine sites although the pollution index of soil and water also significant for waste mines has shown. In this study mainly focused on IPI for sediment pollution index along with water and soil pollution index. Meanwhile, sediments are the final pathway of both natural and anthropogenic components produced or derived from the environment. Sediment quality is a good indicator of pollution in the water, where heavy metals and other organic pollutants tend to concentrate. Continuous pollutant discharge from abandoned mines increases the risk of heavy metals contamination and accumulation of sediments can cause long term environmental pollution and ecosystem disturbance. According to this study, the IPI provides the measurement of most polluted mine sites based on their pollutant levels which becomes more convenient to conduct prioritize surveys and evaluation methods of environmental contamination.
Anti-bacterial Effects of Non-thermal Plasma Water on Acne Vulgaris
Jesmin Ara,Dong Heui Kim,Kyu Jae Lee 한국물학회 2017 한국물학회지 Vol.6 No.1
Human skin is full of normal flora, most of the flora has a beneficial effect on human skin. In certain condition, cutaneous flora can trigger pathologic conditions like acne vulgaris. Propionibacterium acnes and Staphylococcus epidermidis were recognized as pus-forming bacteria triggering an inflammation causing acne. The present study conducted to evaluate antibacterial activities of non- thermal plasma water against these etiologic agents of acne vularis. we tested both aerobic and anaerobic load of facial bacteria especially from cheek and forehead before and after application of non-thermal plasma water. These results shows effective antibacterial effect on both aerobic and anaerobic bacteria from all the participants. Therefore, this plasma water is recognizable in functional and could be a possible alternative treatment for acne.
생물담체 공정을 기반으로 한 생물학적 질소 제거의 기술 개발 동향: 리뷰
( Jesmin Akter ),( Hiyaw Hatiya Ware ),이재엽 ( Jae-yeop Lee ),김일호 ( Ilho Kim ) 한국물환경학회 2020 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2020 No.-
This review paper summarizes biological nitrogen removal based on the bio-media filtration process. Biological filtration using the bio-media filtration technique that utilizes biological micro-organisms to remove nutrients from the wastewater. The main two strategies for the removal of nitrogen from domestic wastewater are nitrification and denitrification. Nitrification is carried out in two steps. First, ammonia (NH3) is converted to nitrite (NO2 -) by ammonia-oxidizing bacteria (AOB) and the second step, nitrite-oxidizing bacteria (NOB) convert nitrite to nitrate (NO3 -). Denitrification is an anoxic process whereby NO3 - is converted to nitrogen gas (N2) by heterotrophic microorganisms using a carbon source as the electron donor. In domestic wastewater, nitrogen originates from waste products of the human body and other organic waste materials. Because eutrophication and nitrate is a risk to human health, the removal of nitrogen from wastewater has become a worldwide concern. A recent study has been shown that various bio-media efficiently used for nitrification and denitrification process, also the growth of biofilm is the potential for ammonia removal. Therefore, the specific surface area of bio-media is available for bio-film growth depends on media types and texture influenced nitrification. The objective of this paper is to describe the bio media treatment process in the biological treatment system for sustainable development in the nitrogen removal process.