Low Power VLSI 설계를 위한 Circuit-level Power 해석 환경 개발

이재훈(Jai-Hoon Lee),김택수(Taek-Soo Kim),공정택(Jeong-Taek Kong),이상훈(Sang-Hoon Lee) 대한전자공학회 1997 대한전자공학회 학술대회 Vol.1997 No.7

고정형 광펜톤 유사반응을 이용한 BPA, PCP 제거

조용성(Yong Seong Cho),이재훈(Jai Hoon Lee) 대한환경공학회 2006 대한환경공학회 학술발표논문집 Vol.2006 No.12

실시 측정시스템을 활용한 실내 환경에서 HONO 농도 조사

홍진의(Jin Hee Hong),이재훈(Jai Hoon Lee),박승식(Seung Shik Park) 한국대기환경학회 2007 한국대기환경학회지 Vol.23 No.2

Influence of internal connection length on screw loosening in internal connection implants

김지선,박영범,최현민,김성태,김현철,김선재,문홍석,이재훈,Kim, Ji-Sun,Park, Young-Bum,Choi, Hynmin,Kim, Sungtae,Kim, Hyeon Cheol,Kim, Sun Jai,Moon, Hong-Seok,Lee, Jae-Hoon The Korean Academy of Prosthodonitics 2017 대한치과보철학회지 Vol.55 No.3

목적:본 연구에서는 long internal connection 형태의 임플란트 지대주를 내부 연결 길이에 변화를 주어 임플란트-지대주 결합부의 안정성을 비교 평가해 보고자 하였다. 재료 및 방법: Long internal connection의 임플란트(Replus system, $4.7{\times}11.5mm$)를 각각 지대주의 길이에 따라 4개의 군(1, 2, 3, 4 mm 군)으로 나누었고 총 20개의 시편을 사용하였다. 시편을 레진에 매몰하여 고정시키고 100 N의 힘으로 임플란트 장축에 대해 30도의 각도에서 $1.0{\times}10^6$ 번의 반복하중을 가한 후 하중 전 후의 풀림회전력의 차이를 계산하여 95% 유의수준에서 Kruskal-Wallis 검정 방법을 통해 통계 분석하였다. 결과:지대주 내부 길이에 따른 풀림 회전력의 통계적 유의성은 나타나지 않았으며 (P > .05) 어떤 시편에서도 완전한 나사 풀림이나 나사 파절은 관찰되지 않았다. 결론: 내측 연결 임플란트에서 지대주 내부길이에 따른 나사 풀림의 정도는 차이가 나지 않았다. Purpose: The purpose of this study was to evaluate whether the internal abutment length affected screw stability in an internal connection implant. Materials and methods: Twenty long internal connection implants (Replus system, $4.7{\times}11.5mm$) were selected for this investigation. Abutments were assigned to four groups depending on the length of the internal connection (abutments with internal lengths of 1, 2, 3, and 4 mm, respectively). Each implant fixture specimen was embedded in resin medium and connected to an abutment with an abutment screw. A load of 100 N, applied at an angle of $30^{\circ}$ to the long axis of the implant, was repeated for $1.0{\times}10^6$ cycles. Reverse torque values (RTV) were recorded before and after loading, and the change in RTV was calculated. Data were analyzed with the Kruskal-Wallis test. Results: The change in RTV was not significantly different among the groups (P>.05). Screw loosening and fractures were not observed in any groups, and joint stability was maintained. Conclusion: The internal length of the abutment may not significantly affect the degree of screw loosening.

파킨슨병과 본태성 진전의 감별진단에서 I-123 IPT(I-123-N-(3-iodopropen-2-yl)-2β-carbomethoxy-3β-(4-cholorophenyl) tropane) 뇌 단일광전자방출 전산화단층촬영의 역할

배문선 ( Moon Sun Pai ),최태현 ( Tae Hyun Choi ),안성민 ( Sung Min Ahn ),최재용 ( Jai Yong Choi ),류원기 ( Won Gee Ryu ),이재훈 ( Jae Hoon Lee ),유영훈 ( Young Hoon Ryu ) 대한핵의학회 2009 핵의학 분자영상 Vol.43 No.2

대구섬유산지의 공급연쇄망 구축방안

하영석,류건우,이재훈 한국물류학회 1999 물류학회지 Vol.9 No.-

The textile industry of Daegu used to be pivotal in the economic development and industrialization of Korea, and played a leading role in export during the 1970's. Recently the city could not sustain the fame and glory of the past because of a lack in information sharing, partnering and R&D. By this reason, this paper tries to show how to settle an efficient supply chain network in the textile industry to enhance international competitiveness on the basis of the results of questionnaire. To achieve the purpose of the research, 161 firms were investigated, classified by yarn manufacture, weaving manufacture, sub- contracted weaving manufacture, dying manufacture and converter & textile- exporting firms. After analysis, the following characteristics were exploited : Most important partners in the future related to production were chosen by the order of yarn manufacture, dying mattufacture, weaving manufacture and converter & textile-exporting firms. The percentage of selection in a multiple choice were 58%, 52.9%, 49% and 40.7% respectively. And most important partners in the future related to sales were chosen by the order of converter & textile-exporting firms, dying manufacture, yarn manufacture and weaving manufacture. Furthermore, it was found that information sharing and dying-technology improving were the most urgent activities to enhance competitiveness and product quality in the supply chain. In conclusion, four supply chain models were suggested, such as core-function -strengthening model, just-in-time for textile, distribution-focused model and textileproduction-development-unit.

자궁내막증을 갖는 불임환자에서 체외수정시술시 내과적 외과적 치료의 유용성

최규홍,김계현,강인수,이재훈,송지홍,유근재,송인옥,최범채,궁미경,양광문 대한산부인과학회 2000 Obstetrics & Gynecology Science Vol.43 No.3

목적: 자궁내막증을 갖는 불임환자에서 내과적 외과적 치료가 체외수정시술후 임신율을 높일 수 있는지 알아보고자 하였다. 연구방법: 1995년 1월부터 1998년 12월간에 삼성제일병원 산부인과에 내원하여 자궁내막증만을 불임원인으로 진단되고 35세이하, 혈중 기저 난포자극호르몬농도가 10IU/ml이하인 불임여성중 내과적/외과적 치료후 1년동안 임신시도에 실패한 191명에서 단기 또는 장기 과배란 유도후 체외수정시술을 시행하여 배아이식이 취소된 18주기를 제외한 296주기를 연구대상으로 하였다. 내과적 치료는 다나졸 (danazole, 영풍, 한국) 600mg/일 을 4-6개월간 경구투여하였으며 간장장애가 발생한 경우 유사성선분비호르몬 (GnRh agonist, decapeptyl, Ferring, Germany)을 3.75mg/월 용량으로 잔여기간동안 근주 하였다. 자궁내막증의 병기는 1985년 미국불임학회에서 정한 바에 따랐다. 연구대상은 체외수정시술전 치료를 하지 않은 경우 그룹 1, 골반경수술을 시행한 경우 그룹 2, 내과적 치료를 한 경우 그룹 3, 내과적/외과적 병합치료를 한 경우 그룹 4로 하여 각 그룹간에 소요된 성선자극호르몬의 양, 획득된 난자수, 배아수 및 임신율간에 유의한 차이가 있는지 알아보았으며 DBSTAT Ver. 2.0을 사용하여 t 검정 및 카이제곱검정을 시행하여 p $lt; 0.05 인 경우 통계적으로 유의하다고 판정하였다. 결과: 평균연령 (±평균의 표준오차)은 각 그룹에서 31.5±0.3, 31.6±0.5, 31.5±0.2, 31.7±0.4였으며 평균 불임기간 (개월)은 각각 57.7±3.3, 64.5±4.8, 59.1±1.9, 52.0±3.7이었다. 임신 28주 이상의 생존 가능임신율은 12.5% (10/80), 13.5% (5/37), 14.3%(20/140), 30.8% (12/39)로 그룹4에서 가장 높았으며 (p=0.03) 소요된 성선자극호르몬의 양 (ampule)은 단기과배란요법에서 28.2±0.6 (평균±평균의 표준오차), 장기과배란요법에서 35.5±1.2로 장기과배란유도시 많은 양이 소요되었으나 (p$lt;0.0001) 생존가능임신율은 각각 16.1% (37/230), 14.5% (10/69)로 두 군간에 유의한 차이가 없었다. 결론: 자궁내막증을 갖는 불임여성에서 체외수정시술전 내과적 외과적 치료는 체외수정시술후 임신율을 향상시킬 수 있는 유용한 방법이며 과배란 유도시에는 단기과배란유도가 유익하리라고 사료된다. Objective: The aim of study was to evaluate the efficacy of medical and/or laparoscopic surgical treatment for improvement of reproductive outcome of in vitro fertilization and embryo transfer (IVF-ET) in the patients with endometriosis. Methods: 296 IVF-ET cycles except 18 cycles of cancelled embryo-transfer (unfertilization; 16 cycles, high risk of ovarian hyperstimulation syndrome; 2 cycles) in 191 infertile women with endometriosis from January 1, 1995 to December 31, 1998 were included in this study. All women's ages were ≤ 35 and the factor for infetility was endometriosis only and day 3 follicle stumulating hormone (FSH) level of all the cycles was ≤ 10 mIU/ml in this study. All the baseline study about infertility was done before initiating treatment of infertility. The stage of endometriosis was recorded during diagnostic laparoscopy by WHO critera. Medical treatment (GnRH agonist or danazole) or laparoscopic surgery was done independently or combinedly by the physician's decision according to the disease entity and symptoms. Short or long protocols were used for controlled ovarian hyperstimulation and 3 day embryos were transferred (maximally 4 embryos) by standard procedures in our institute. We classified the cases as 4 groups : group 1 (without pre-treatment, 80 cycles), goup 2 (laparoscopic surgery only, 37 cycles), group 3 (medication only, 140 cycles), group IV (combined pre-treatment, 39 cycles). Results: The mean age (years old, mean ± SEM) was 31.5 ± 0.3 (group 1), 31.6 ± 0.5 (group 2), 31.5 ± 0.2 (group 3), 31.7 ± 0.4 (group 4) respectively. The duration of infertility (months) was 57.7 ± 3.3, 64.5 ± 4.8, 59.1 ± 1.9, 52.0 ± 3.7 respectively among groups. The viable pregnancy rate (over 28 gestational weeks, VPR) was 12.5 % (10/80) in goup 1, 13.5 % (5/37) in goup 2, 14.3 % (20/140) in group 3, 30.8 % (12/39) in group 4 and there was statistically significant difference between group 1 and group 4 (P=0.03, Chi square test). The total used gonadotropins (ampules) for controlled ovarian hyperstimulation were 28.2 ± 0.6 (mean ±SEM) in short protocol group, 35.5± 1.2 in long protocol group and there was statistically significant difference(p$lt;0.0001,Chi square test). The viavle pregnancy rate(VPR) was 16.1%(37/230), 14.5%(10/69) respectively and there was no statistically significant difference. Conlusion: We concluded that combined pre-treatment(laparsoscopic surgery plus medical treatment)would be better than no treatmecnt for the increase of pregnancy nate after IVF-ET.