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김정욱,정명채,김동진,전기석,이창환,Kim, Jeong-Wook,Jung, Myung-Chae,Kim, Dong-Jin,Jeon, Gee-Seok,Lee, Chang-Hwan 한국지하수토양환경학회 2011 지하수토양환경 Vol.16 No.6
This study presents a state of the art in evaluation on naturally occurring asbestos (NOA) areas and effective strategies for investigation and management of NOA areas in Korea. First of all, we defined and classified the NOA area as compiling various countries' regulations, then discussed the best methods for evaluation and management of NOA for reducing exposure of asbestos in the vicinity of NOA areas. According to the literature survey, a three-steps management strategy was suggested in this study. The first step is a confirmation stage of asbestos contamination possibility and the second step is an assessment stage of asbestos contamination using investigation, analysis, evaluation and reclamation. The final step is a following-up control stage. These three management steps for NOA area will give the maximum effectiveness of NOA control in Korea.
일반적인 체외수정 방법과 세포질내 정자주입술로 얻어진 배아의 동결-융해 후 이식의 결과
김정욱,한미현,변혜경,전진현,손일표,궁미경,백은찬,강인수,이호준,Kim, Jeong-Wook,Han, Mi-Hyun,Byun, Hye-Kyung,Jun, Jin-Hyun,Son, Il-Pyo,Koong, Mi-Kyoung,Paik, Eun-Chan,Kang, Inn-Soo,Lee, Ho-Joon 대한생식의학회 1997 Clinical and Experimental Reproductive Medicine Vol.24 No.1
Intracytoplasmic sperm injection (ICSI) recently has been utilized widely as the most successful technique to overcome the unfertilization problem in cases of severe male infertility in couples who could not be treated by conventional IVF. Recently, indications of ICSI have been extended further and more fertilized oocytes become available. Thus, it is necessary to examine the efficiency of freezing the surplus embryos obtained from ICSI. We compared the survival rate and the future outcome of cryopreserved embryos obtained either after conventional IVF or ICSI during the same period. After ICSI or IVF, five best-quality embryos from each patient were transferred in the stimulation cycle and the surplus pronuclear (PN) stage oocytes or multicellular embryos were cryopreserved by slow freezing protocol with 1,2-propanediol (PROH) as a cryoprotectant. A total of 792 embryos from ICSI trial were thawed and 65.2% (516/792) survived. The survival rates of PN stage oocyte, multicellular embryo and PN + multicellular embryo were 63.5%, 68.2%, 64.0%, respectively. After 111 transfers, 34 pregnancies were achieved, corresponding to a clinical pregnancy rate of 30.6% per transfers. We thawed 1033 embryos from IVF trials and 57.5% (594/1033) survived. In IVF cycle, the survival rates of PN stage oocyte, multicellular embryo and PN + multicellular embryo were 58.2%, 65.2%, 40.2%, respectively. Thirty eight clinical pregnancies were established after 134 transfers, corresponding to a pregnancy rate of 28.4% per transfer. The cleavage rate of thawed PN stage oocytes from ICSI trial (61.3%) was significantly higher than those from conventional IVF (53.4%). The developmental rates of good embryo (${\geqq}$ grade II) in thawed PN stage oocytes obtained from conventional IVF and ICSI were 63% and 65%, respectively. We concluded that PN stage oocytes, multicellular embryos resulting from ICSI procedure can be successfully frozen/thawed with reasonable clinical pregnancy rates comparable to those of IVF.
분산MAC기반 UWB QoS 만족향상을 위한 통신 프로토콜
김정욱 ( Jung Wok Kim ),박진관 ( Jin Kwank Park ),김영주 ( Young Ju Kim ),양준철 ( Jun Chul Yang ),김경호 ( Kung Ho Kim ),이연우 ( Yeonwoo Lee ),이성로 ( Seong Ro Lee ) 한국정보처리학회 2012 한국정보처리학회 학술대회논문집 Vol.19 No.1
본 논문에서는 UWB 기술 기반 WiMedia Distributed Medium Access Control (D-MAC) 표준 프로토콜에 적용할 수 있는 Satisfaction of QoS (SoQ) 기반 협력 통신 프로토콜을 제안한다. 이를 위해 UWB 링크 전송 속도와 QoS 척도에 따른 릴레이 노드 선정 알고리즘을 제안한다. 본 논문에서 제안하는 SoQ 기반 협력 통신 프로토콜은 분산적인 D-MAC 표준 기술과 호환성을 갖고, 각 디바이스에서 독립적으로 실행되는 SoQ 기반 Relay Node Selection (RNS) 기준에 따라 실행된다.
동시공학 설계 개념을 이용한 자동차 현가장치의 최적 설계
김정욱(Junguk Kim),이종원(Chongwon Lee),이희각(Heegak Lee) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
Concurrent engineering design methods can be applied to meet the demand for the quality product with lower<br/> production cost and time. In this paper, the optimal design of the automotive suspension system using concurrent<br/> engineering design concept is studied. The optimal design process of the automotive suspension system using<br/> concurrent engineering design concept is composed of a pre-processing design stage, an analysis stage and a postprocessing<br/> stage. In this paper, a method for kinematic design sensitivity analysis of a McPherson strut suspension<br/> system which is widely used for a front wheel suspension is proposed and then an optimal design based on the<br/> sensitivity analysis through this optimal design process is performed.
김정욱 ( Jung Wook Kim ),김상현 ( Sang Hyun Kim ),이드보라 ( Deborah Lee ),이상석 ( Sang Seok Lee ),박성욱 ( Sung Wook Park ),황선욱 ( Seon Wook Hwang ) 대한피부과학회 2008 大韓皮膚科學會誌 Vol.46 No.10
Background: Dualight(TM) is a recently developed phototherapeutic device that is used for targeted phototherapy. However, the efficacy of Dualight(TM) therapy for vitiligo has not been evaluated nor has it been reported on in the Korean medical literature. Objective: This study was conducted to evaluate the efficacy of Dualight(TM) therapy for treating localized vitiligo and we wanted to determine the clinical parameters that could affect the therapeutic outcome. Methods: Eighty-three lesions from thirty-eight patients were treated by using Dualight(TM) once or twice a week. The repigmentation grade of each treated lesion was evaluated on a 5-point scale from 0 (no repigmentation), 1 (1∼24%), 2 (25∼49%), 3 (50∼74%), to 4 (75∼100%). Results: Thirty-four lesions of the 83 lesions (40.9%) improved to 50% repigmentation after Dualight(TM) therapy. The clinical parameters that affected the therapeutic outcome were the lesions` anatomical location and the clinical subtype of vitiligo. Yet a history of previous treatment and the skin type did not affect the therapeutic result. Perilesional hyperpigmentation (47.4%) was the most common side effect, but the other adverse effects were limited and transient. Conclusion: Dualight(TM) therapy is an effective, safe therapeutic modality for localized vitiligo. However, similar to other non-surgical therapeutic modalities, the therapeutic outcome is mainly dependent on the anatomical location. (Korean J Dermatol 2008;46(10):1369∼1375)