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폴리비닐클로라이드 해양광생물반응기와 고밀도 폴리에틸렌 해양광생물반응기에서 미세조류, Tetraselmis sp. KCTC12236BP의 생산성 비교
정성균(Seung-Gyun Jung),김수권(Su-Kwon Kim),변문섭(Moon-Sup Bun),조용희(Yonghee Cho),신동우(Dong-Woo Shin),김지훈(Z-Hun Kim),임상민(Sang-Min Lim),이철균(Choul-Gyun Lee) 한국해양바이오학회 2016 한국해양바이오학회지 Vol.8 No.1
It is important to design photobioreactor by cheap material for economical microalgal biomass production. In this study, two types of marine photobioreactors (MPBR), made by either polyvinyl chloride (MPBR-PVC) or high density poly ethylene (MPBR-HDPE), are used and performance of these were compared. Tetraselmis sp. KCTC 12236BP is a green marine alga that isolated from Ganghwa Island, Korea, and the strain was used for marine cultivations using MPBR-PVC and MPBR-HDPE. The cultivations were performed three times in the spring season of 2012 using MPBR-PVC and of 2013 using MPBR-HDPE in the coastal area of Young Heung Island. As the results, MPBR-PVC shows higher biomass productivities than MPBR-HDPE, due to its high light transmittance. In the cultivations using MPBR-PVC, the average sea water temperature was 11.5°C during the first experiment and 16.5°C during the second and third experiments. Average light intensities during three times for experiments were 407.5, 268.1 and 273.0 μ·E·m<SUP>-2</SUP>·s<SUP>-1</SUP>, respectively. The maximum fresh cell weight and average biomass productivity were 1.2 g·L<SUP>-1</SUP> and 0.12 g·L<SUP>-1</SUP>·day<SUP>-1</SUP>. These results showed that Tetraselmis sp. KCTC12236BP were adapted well with the environmental conditions from ocean, and grow in the MPBR-PVC and MPBR-HDPE.
안전한 U-City 인프라 구축을 위한 미국의 공통보안규격 제도 분석
정성수(Sung-Soo Jung),고갑승(Kab-Seung Kou),문길종(Gil-Jong Mun),이남일(Nam-il Lee),류동주(Dong-Ju Ryu) 한국정보기술학회 2012 Proceedings of KIIT Conference Vol.2012 No.5
국내에서는 보안성평가, 정보보호안전진단, 정보보호관리체계 등 다양한 정보보증에 대한 보안정책을 수립 및 시행하고 있지만, 국가기관에 사용되는 PC에 대한 공통보안규격에 대한 관심은 미흡한 실정이다. 미국에서는 SCAP(The Security Content Automation Protocol) 제도, FISMA(Federal Information Security Management Act) 제도, USGCB(The United States Government Configuration Baseline) 제도 등을 시행하고 있다. 이 중 USGCB 제도는 미국 연방기관에서 사용되는 모든 PC들을 일정 수준 이상의 보안 수준을 유지하기 위한 제도로써, 국내 U-City 인프라 환경 내의 PC에 대한 보안 관리지침으로 활용 가능할 것으로 예상된다. 이에 따라, 본 논문에서는 USGCB를 소개하고 현행 국내에서 시행하고 있는 정보보증제도와 비교 및 분석하였다. In South Korea, various information assurance scheme (CC(Common Criteria), ISCS(Information Security Check Service) and ISMS(Information Security Management System)) is enforced. But state agencies use a common security standard for the PC is insufficient attention to. In the United States, SCAP(The Security Content Automation Protocol), FISMA (Federal Information Security Management Act) and USGCB(The United States Government Configuration Baseline) are enforced. USGCB of this scheme is used in a U.S. federal agency for all PC more than a certain level of security as a system to maintain the level. Accordingly in this paper introduce USGCB and analyzed Information Security Schemes of South Korea.
차량 환경에서 통신 효율 향상을 위한 클러스터링 기반의 멀티채널 매체접속제어 프로토콜 개발
정성대(Sung-Dae Jung),이승진(Seung-Jin Lee),이상선(Sang-Sun Lee) 한국통신학회 2009 韓國通信學會論文誌 Vol.35 No.6
차량 간 통신에서는 무선 랜을 기반으로 한 연구가 활발히 진행 되고 있으며, IEEE 802.11p WAVE(Wireless Access in the Vehicular Environment)에서도 802.11a를 기반으로 한 방식을 채택하고 있다. 하지만 무선 랜 방식은 하나의 채널을 경쟁 모드로 사용하기 때문에 빠른 접속을 요구하는 차량 환경에서 경쟁을 회피하기 위해 CSMA/CA(Carrier Sense multiple Access / Collision Avoidance) 알고리즘을 사용하는 것은 찾은 충돌로 인한 통신 지연을 유발 할 수 있다. 본 논문에서는 차량 간 통신에서 이러한 문제점을 해결하고 신뢰성 있는 데이터 전송을 지원하기 위하여 차량 환경에 적합한 클러스터링 기반의 멀티채널 매체접속제어 프로토콜을 설계하고 설계된 프로토콜을 바탕으로 차량 간 통신에 적합한 채널 조건을 확인하였다. 클러스터 헤드를 통해 각 채널을 관리하고 채널을 할당함으로써 기존 경쟁 기반의 싱글 채널을 사용함에 따라 생기는 패킷 충돌 및 통신 지연을 60%이상 줄이는 것을 시뮬레이션을 통해 확인 하였다. In VANET(Vheicle Ad hoc Network), the researches based on the wireless LAN are conducting and the method based on 802.11a is being adapted in IEEE 802.11p WAVE(Wireless Access in Vehicular Environments). However, wireless LAN which uses a single channel in a competition can cause transmission delays because of a frequent collision and a use of CSMA/CA to avoid competition in VANET requiring a fast access. In this paper, we designed CMMP (Clustering based Multi-channel MAC protocol) adequate to VANET and then confirmed the appropriate channel conditions in a V2V communication on the basis of this protocol. The simulation results showed that a packet collision and a transmission delay by the use of an existing single channel based on the contention decreased more than 60% by CMMP.
양전하가 부가된 수처리 필터의 입자제거특성에 관한 연구
정성학(Sung-Hak Jung),김종원(Jong-Won Kim),김상희(Sang-Hee Kim),전병헌(Byung-Heon Jeon),이승갑(Seung-Gap Lee),이재근(Jae-Keun Lee),안영철(Young-Chull Ahn) 대한설비공학회 2012 설비공학 논문집 Vol.24 No.5
The purpose of the present work is to investigate the removal characteristics of positively charged filters for capturing negatively charged particles such as bacteria and virus in water. In order to reduce the pressure drop and increase the filtration efficiency, the filter media, modified by charge modifier having positive functional groups, is developed and evaluated. Improved liquid filters have been developed with the modified surface charge to capture and adsorb particles by electrokinetic interaction between the filter surface and particles contained in an aqueous liquid. The positively charged filter media is composed of glass fiber, cellulose and poly-ethylenimine resin for positively charging with the variation of volume ratio. The zeta potential value of the positively charged filter is +37.92 mV at the glass fiber and cellulose content ratio of 50:50 with resin content of 100%, while that of the PSL test particle is -23.5 mV at pH 7. The removal efficiency of the electro-positively charged filter is 98% for PSL particles of 0.11 ㎛, while that of the negatively charged filter is 7%. The positively charged filter media showed the potential to be an effective method for removing fine particles from the contaminated water for liquid filtration.
유전자 재조합 B 형 간염 바이러스 표면 항원 , CJC-50100 의 일반약리작용
정성학(Seong Hak Jeong),최재묵(Jae Mook Choi),이남중(Nam Jung Lee),전형수(Hyung Soo Jeon),김연희(Yon Hee Kim),김재승(Jae Seung Kim),하석훈(Suk Hoon Ha),김영훈(Young Hoon Kim),이나경(Na Gyung Lee),김제학(Je Hak Kim),박완제(Wan Je Park 한국응용약물학회 2001 Biomolecules & Therapeutics(구 응용약물학회지) Vol.9 No.1
N/A CJC-50100 is a recombinant hepatitis B virus surface antigen (HBsAg) expressed in yeast. The general pharmacological properties of CJC-50100 were evaluated in mice, rats, dogs and isolated guinea pig ileum. The doses were 0.33∼33.3 ㎍/㎏ i.m. for mice and rats and 3.3∼9.9 ㎍/㎏ i.v. for dogs. The concentrations of 0.002∼0.02 ㎍/mlwere used for the assay with guinea pig ileum. Intramuscular administration of CJC-50100 at the doses did not alter general behavior and the responses for central nervous system, smooth muscle, gastrointestinal system, cardiovascular and respiratory system, and water and electrolytes excretion. In summary, CJC-50100 had no pharmacological effect in these studies even up to the 100-fold of the expected clinical dose, 20 ㎍/man/60 kg.
Lee Jin Wook,Song Eun Mi,정성애,Jung Sung Hoon,Kim Kwang Woo,고성준,Lee Hyun Jung,Hong Seung Wook,Park Jin Hwa,Hwang Sung Wook,Yang Dong-Hoon,Ye Byong Duk,Byeon Jeong-Sik,Myung Seung-Jae,Yang Suk-Kyun,Park 대한의학회 2021 Journal of Korean medical science Vol.36 No.48
In 2020, the novel coronavirus disease 2019 (COVID-19) began to spread worldwide and remains an ongoing medical challenge. This case series reports on the clinical features and characteristics of patients with inflammatory bowel disease (IBD) and confirmed COVID-19 infection. From February 2020 to March 2021, nine patients with IBD had confirmed COVID-19 across four hospitals in Korea. The median age at COVID-19 diagnosis was 42 years. Six patients were male, and seven patients had ulcerative colitis (UC). No patients required oxygen therapy, intensive care unit hospitalizations, or died. The most common symptom was fever, and gastrointestinal (GI) symptoms developed as diarrhea in five patients with UC. Oral steroids were used to combat UC aggravation in two patients. In this case series of nine IBD patients diagnosed with COVID-19 in Korea, the clinical presentation was predominately a mild respiratory tract infection. Most patients with UC developed new GI symptoms including diarrhea.
알코올 의존 환자에서의 12단계 척도의 신뢰도와 타당도 연구
정성수(Sung Soo Jung),하태민(Tae Min Ha),김경승(Kyung Seung Kim),이성근(Seong Keun Lee),심주철(Joo Cheol Shim),공보금(Bo Geum Kong),정도운(Do Un Jung) 대한생물치료정신의학회 2014 생물치료정신의학 Vol.20 No.1
Objectives:This study is aimed to assess the reliability and validity of the Twelve Step Scale which are newly developed to observe the direct effect of the twelve step facilitation therapy that has been widely used for the treatment of patients with alcohol dependence. Methods:110 patients who were diagnosed with alcohol dependence by psychiatrists using DSM-TR criteria agreed to participate in the study. Subjects were assessed by questionnaires including demographic data and alcohol related clinical rating scales such as Twelve Step Scale, Korean version of Alcohol Use Disorders Identification Test, Alcohol Dependence Scale, Hanil Alcohol Insight Scale when informed consents were acquired. Four weeks later after initial assessment, Twelve Step Scale was reassessed for subjects who were treated over 3 months at the same hospital without recent admission or discharge for a month. Results:The average of the Twelve Step Scale was higher in female patients than in male. In addition, there is positive correlation between HAIS and Twelve Step Scale. According to factor analysis, Twelve Step Scale has two factors. The results showed significant internal consistency reliability(Cronbach’s α=0.92) but did not show reasonable test-retest reliability. Conclusion:This study showed that the Twelve Step Scale had reasonable reliability and validity except test-retest reliability. Thus the Twelve Step Scale can be used to assess the direct effects of twelve step facilitation therapy, which in turn might contribute to enhance twelve step facilitation therapy in the future.