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( Eunsuk Jang ),( Eunsil Lee ),( Bokyoung Joo ) 한국폐기물자원순환학회(구 한국폐기물학회) 2015 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2015 No.-
Hydrothermal carbonization (HTC) is a highly effective technique for treating lignocellulosic biomass and organic waste of various shapes and moisture content. The solid product of HTC is friable, hydrophobic, and increased in mass and energy densification compared to the raw biomass. also solid product is similar regardless of the type of biomass used. A liquid solution of five carbon and six carbon sugars, along with various organic acids and 5-HMF, is also produced from HTC of lignocellulosic biomass. The gaseous phase product consists mostly of CO<sub>2</sub>. Solid product has the similar characteristics to low rank coal. The solid fuel characteristics of feedstock was increased with reaction temperature and time via HTC process. However, mass yield was decreased with increasing temperature and time. Therefore, it is necessary to optimize the reaction temperature and time for HTC. The HTC process produces the solid product and a large amount of water. Thus the reuse or treatment techniques of liquid product is necessary. Therefore, potential of biological treatment of HTC liquid product was evaluated.
Eunsuk Jang,Eunsil Lee,Bokyoung Joo 한국폐기물자원순환학회 2015 한국폐기물자원순환학회 학술대회 Vol.2015 No.05
Hydrothermal carbonization (HTC) is a highly effective technique for treating lignocellulosic biomass and organic waste of various shapes and moisture content. The solid product of HTC is friable, hydrophobic, and increased in mass and energy densification compared to the raw biomass. also solid product is similar regardless of the type of biomass used. A liquid solution of five carbon and six carbon sugars, along with various organic acids and 5-HMF, is also produced from HTC of lignocellulosic biomass. The gaseous phase product consists mostly of CO2. Solid product has the similar characteristics to low rank coal. The solid fuel characteristics of feedstock was increased with reaction temperature and time via HTC process. However, mass yield was decreased with increasing temperature and time. Therefore, it is necessary to optimize the reaction temperature and time for HTC. The HTC process produces the solid product and a large amount of water. Thus the reuse or treatment techniques of liquid product is necessary. Therefore, potential of biological treatment of HTC liquid product was evaluated.
장은석(Eunsuk Jang) 한국자동차공학회 2018 한국자동차공학회 부문종합 학술대회 Vol.2018 No.6
The need of software redundancy design is growing and the software architecture which is independent and verifiable is necessary to satisfy software safety requirement in the environment where the customers require the functional safety. In this paper, we propose the software architecture which is suitable for software redundancy design. The main points of this paper as follows: Firstly, we describe the architecture of redundancy software design for internal fault. Secondly, we explain the architecture of redundancy software design which can operate system properly with hardware fault.
The Utilization of Dental Hygienists in Oral Healthcare Exchanges between the South and North Korea
( Eunsuk Ahn ),( Ji-hyoung Han ),( Kyung-hee Kang ),( Young-eun Jang ),( Ki-ha Jeon ),( Jeong-ran Park ) 한국치위생과학회 2021 치위생과학회지 Vol.21 No.1
Background: This study aimed to identify the role of dental hygienists in exchanges between North and South Korea to lower gaps in the level of dental healthcare between the two countries by conducting a Delphi survey with specialists and identifying alternative policies regarding the utilization of dental hygienists in such exchanges. Methods: Two Delphi surveys were conducted with the participation of nine specialists, and descriptive statistical analyses including mean and standard deviation were performed on the collected data. Results: Among methods of exchange and cooperation regarding oral healthcare under the current North Korean medical system, the issue considered most urgent was the “establishment of oral healthcare infrastructure.” The most important short-term strategy was identified as the “selection and formation of partnerships in the field of inter-Korean oral health exchange and cooperation.” The mid-term strategy was identified as the “establishment of cooperation in the dental industry, centered on educational cooperation projects.” The long-term strategy included “joint R&D projects, oral health surveys, and business development.” In order to determine how best to use dental hygienists during inter-Korean exchanges and cooperation, the respondents placed urgency on the “establishment of joint cooperation projects for oral health promotion and early examination and the treatment of dental diseases and planning of community research projects” and “the role of oral health education and media development for residents.” Conclusion: Cooperation is necessary regarding the preparation of oral healthcare exchanges that aim to encourage unity between North and South Korea and reduce the gaps between the North and South regarding oral health conditions. Therefore, continuous and reasonable discussions and research are needed regarding the utilization of dental hygienists in such exchanges.
Force-Directed Scheduling Revisited by Statistical Static Timing Analysis
Eunsuk Park,Naeun Jang,Juho Kim 대한전자공학회 2010 ICEIC:International Conference on Electronics, Inf Vol.1 No.1
This paper proposes variation-aware force-directed scheduling for high-level synthesis. In conventional high-level synthesis, the delay of functional unit is modeled as a worst case based deterministic value. This corner based approach does not consider the yield and the result of synthesis is too pessimistic. Our method utilizes techniques of statistical static timing analysis to form delay distribution of each functional unit. Experimental results on benchmark circuits show that the proposed algorithm effectively reduces the resource requirement while preserving the performance.
Jang, Kang Won,Lee, Kyung Hye,Kim, Soo Hyuk,Jin, Taewon,Choi, Eun Young,Jeon, Hyun Ju,Kim, Eunsuk,Han, Ye Sun,Chung, Ji Hyung Wiley Subscription Services, Inc., A Wiley Company 2011 Journal of cellular biochemistry Vol.112 No.12
<P><B>Abstract</B></P><P>Transcriptional factor nuclear factor‐kappaB (NF‐κB) plays a crucial role in human breast cancer cell invasion and metastasis. The carboxyl terminus of Hsc70‐interacting protein (CHIP) is a U‐box‐type ubiquitin ligase that induces ubiquitination and proteasomal degradation of its substrate proteins. In this study, we investigated the role of CHIP in the NF‐κB pathway in the invasion of MDA‐MB‐231 cells, a highly aggressive breast cancer cell line. We showed that overexpression of CHIP significantly inhibits the invasion of the MDA‐MB‐231 cells. The overexpression of CHIP suppressed expression of urokinase plasminogen activator (uPA) and matrix metalloproteinase‐9 (MMP‐9) in MDA‐MB‐231 cells. Moreover, CHIP strongly inhibited the nuclear localization and the transcriptional activity of NF‐κB. The activation of the IkappaB kinase complex (IKK) was also blocked by CHIP overexpression. Importantly, CHIP overexpression resulted in a significant decrease in the level of TNF receptor‐associated factor 2 (TRAF2), an upstream key player in the NF‐κB pathway. However, the level of TRAF2 was restored after treatment with a proteasome inhibitor, MG‐132. Moreover, CHIP overexpression promoted the ubiquitination of TRAF2. We also found cell invasion significantly decreased in cells transfected with TRAF2 small interfering RNA (siRNA). In contrast, when CHIP expression was suppressed by siRNA in poorly invasive MCF‐7 cells, cell invasion significantly increased in conjunction with enhanced NF‐κB activation and TRAF2 levels. Taken together, these results suggest that CHIP regulates NF‐κB‐mediated cell invasion via the down‐regulation of TRAF2. J. Cell. Biochem. 112: 3612–3620, 2011. © 2011 Wiley Periodicals, Inc.</P>
엄태인,장재덕,조재광,이상길,장은숙 한밭대학교 생산기반기술연구소 2001 생산기반기술연구소 논문집 Vol.1 No.1
Numerical analysis of reaction in the combustor has been performed to study the flow and temperature fields for the NOx reduction using SNCR(Selective Non Catalytic Reduction) technology for industrial boiler, 30tons of steam an hour with the case of full load. Recently NOx emission can be controlled through thermal reactions by using appropriate reducing chemicals, ammonia and urea etc., whose solution is sprayed into the flue gas including NOx. SNCR is an attractive method from point of view that no catalyst is required, in which NO reduced to N_2 and H_2O. The good mixing and sufficient residence time of reducing agent are key parameter in industrial boiler for NOx reduction in this method. In this study, the flue gas flow and temperature fields are calculated in order to design the optimal SNCR system using numerical calculation. The recirculation area generated near the wall of combustor appears to be important parameter for flame stability and flue gas residence time. The calculation result of temperature profiles agree with experimental data on the cross-sectional are in at the rear of combustor. These results suggests the optimum nozzle point and angle of the chemical injection.