폐 브라운관(CRT) 유리를 잔골재로 대체한 방사선 차폐 채움재의 성능평가

최윤석,장필성,박옥윤,장현오,Choi, Yoon-Suk,Jang, Pil-Sung,Park, Ok-Yun,Jang, Hyun-O 한국건설순환자원학회 2019 한국건설순환자원학회지 Vol.14 No.1

보론강의 보론 분포거동과 특성 ( Boron Distribution behavior and Property of Boron Treated Steel )

최윤석,정원섭,박익민,권광우,지용권,유인석 대한기계학회 1996 대한기계학회 춘추학술대회 Vol.- No.-

계약해제와 귀책사유 - 독일민법상의 채무불이행에 기한 법정해제권의 역사적 발전과의 비교 -

최윤석 한국민사법학회 2016 民事法學 Vol.74 No.-

Das koreanische Zivilgesetzbuch (KZGB) regelt das Rücktrittsrecht des Gläubigers wegen Verzugs der Leistung in § 544 KZGB („Leistet die eine Partei die ihr obliegende Verbindlichkeit nicht, mahnt die andere Partei diese und setzt eine angemessene Frist zur Leistung, so kann die andere Partei von dem Vertrag zurücktreten, wenn die eine Partei innerhalb dieser Frist nicht leistet. Der Mahnung bedarf es nicht, wenn der Schuldner seinen Willen bereits erklärt hat, nicht zu leisten.“), wegen Fixgeschäftes in § 545 KZGB („Erfolgt eine Leistung nicht zu einer bestimmten Zeit oder innerhalb einer bestimmten Frist nach dem Wesen des Vertrages oder den Willenserklärungen der Parteien und kann der Zweck des Vertrages dadurch nicht erreicht werden, so ist die andere Partei berechtigt, ohne Mahnung gemäß § 544 von dem Vertrag zurückzutreten, wenn die eine Partei zu dieser Zeit oder innerhalb dieser Frist nicht leistet.“) und wegen der vom Schuldner zu vertretenden Unmöglichkeit der Leistung in § 546 KZGB („Wird eine Leistung infolge eines Umstandes, den der Schuldner zu vertreten hat, unmöglich, ist der Schuldner berechtigt, von dem Vertrag zurückzutreten.“). Die koreanische Rechtsprechung erwähnt das Vertretenmüssen des Schuldners nur im Fall der Unmöglichkeit und schweigt in allen übrigen Fällen. Dagegen geht die herrschende Lehre davon aus, dass das Vertretenmüssen des Schuldners nicht nur für den Fall der Unmöglichkeit, sondern auch im Fall des Verzugs sowie des relativen Fixgeschäfts erforderlich sei. Um das Verhältnis zwischen dem Rücktrittsrecht in §§ 544-546 KZGB und dem Vertretenmüssen, das sich im koreanischen Recht auf das Verschulden bezieht, zutreffend zu erfassen, ist die Entstehungsgeschichte des deutschen Rücktrittsrechts, insbesondere vor der Modernisierung des Schuldrechts im Jahr 2002 zu untersuchen, da das KZGB unter starkem Einfluss des deutschen BGB kodifiziert wurde. Diese Untersuchung führt zu dem Ergebnis, dass die Väter des BGB lediglich für die Unterscheidung des Zufalls von dem der vom Schuldner zu vertretenden Unmöglichkeit den Begriff „zu vertreten“ in § 325 BGB a. F. aufgenommen haben. Die Grundlage des Rücktrittsrechts entnahmen sie der vom Vertretenmüssen des Schuldners unabhängigen „actio redhibitoria (Wandlungsklage)“, die im römischen Recht dem Gläubiger im Bereich der Gewährleistung beim Kaufvertrag eingeräumt wurde. Unter Berücksichtigung der Umstände, dass die §§ 544, 545 und 546 KZGB bezüglich des gesetzlichen Rücktrittsrechts mit den §§ 325, 361 und 326 BGB a. F. kaum Unterschiede aufweisen, sind die Ergebnisse der Untersuchung des deutschen Gesetzgebungsverfahrens auf die §§ 544-546 KZGB übertragbar. Dementsprechend ist festzustellen, dass die Wandlungsklage die Grundlage für das Rücktrittsrecht im KZGB bildet. Aus diesen Gründen bedarf es keiner Überarbeitung und Änderung der §§ 544-546 KZGB im Hinblick darauf, ein vom Vertretenmüssen des Schuldners unabhängiges Rücktrittsrecht zu schaffen. Ein solches Rücktrittsrecht besteht bereits nach geltender Rechtslage, was die herrschende Literatur verkennt.

유한체적법을 이용한 격자기반의 분포형 강우-유출 모형 개발

최윤석,김경탁,이진희 한국수자원학회 2008 한국수자원학회논문집 Vol.41 No.9

유역의 수문현상을 해석하기 위해서는 다양한 지형자료와 수문 시계열자료가 필요하다. 최근 들어 DEM(Digital Elevation Model)과 수자원 주제도와 같은 지형자료 뿐만 아니라 수치예보자료 및 강우레이더의 관측자료와 같은 수문 시계열자료 또한 격자 형태로 제공되고 있으며, 이를 활용한 수문분석에 대한 다양한 연구가 이루어지고 있다. 본 연구에서는 이러한 격자형 자료를 이용하여 효과적으로 단기간의 강우-유출 현상을 모의하기 위한 물리적 기반의 To analyze hydrologic processes in a watershed requires both various geographical data and hydrological time series data. Recently, not only geographical data such as DEM(Digital Elevation Model) and hydrologic thematic map but also hydrological time seri

전핵 미세 주입법으로 생산된 한국흑염소 수정란의 이식 조건이 수태율에 미치는 영향

최윤석,신현국,장성근,양홍석,이옥근,이두수,조종기,신상태 韓國受精卵移植學會 2007 한국동물생명공학회지 Vol.22 No.1

본 연구는 PI한 한국흑염소 수정란의 이식 결과를 통해 수란 흑염소의 수태율에 영향을 미칠 것으로 생각되는 여러 가지 요인을 분석함으로써, 높은 수태율을 얻을 수 있는 수란 흑염소의 최적 조건을 찾아낼 목적으로 수행하였다. 분석 결과, 수태율에 유의적인 영향을 주는 요인들은 발정형태, 수술 빈도, 이식 부위, 황체의 발육 단계, 수정란의 발육단계, 이식된 수정란의 수 등이었다. 자연 발정이 관찰되어 이식된 흑염소(59.1%, 13/22)들이 로 발정이 This study was investigated factors affecting the pregnancy rates after transfer of pronuclear microinjected embryos for the production of transgenic Korean black goats. Embryo transfer was carried out in 343 recipient Korean black goats from September 1999 to June 2000. Estrus was induced by the insertion of intravaginal progesterone devices for 2 weeks. A single injection of 400 IU equine chorionic gonadotropin was administered at 48h before removal to increase the proportion of does cycling and ovulation rate. Good quality embryos were prepared by microinjection of DNA into the pronuclei of fertilized goat oocyte and cultured in vitro. Pronuclear microinjected cell stage embryos were surgically transferred into the oviducts of the recipient at day 4 or 5 following removal, and morula to blastocyst stage embryos were surgically transferred into uterus at day 9. Pregnancy was diagnosed by transrectal ultrasound scanning at and 8 weeks following embryo transfer. The pregnancy rate was affected by several factors, such as estrus induction, the number of previous transfer, transfer site, stage of CL (corpus luteum), the number of recipient CL, stage of embryos and the number of transferred embryo. The pregnancy rate was significantly higher in recipients that came into estrus naturally than recipients that induced to come into estrus with (59.1% vs. 36.8%; P<0.05). The pregnancy rate was higher when the embryos were transferred into the left oviduct than transferred into the right oviduct (42.9% vs. 35.3%; P<0.05). The pregnancy rate of recipients with (early) stage corpus hemorrhagicum in ovary was hi틴or than recipient with (late) stage hemorrhagicum (47.5% vs. 17.9%; P<0.01). Higher pregnancy rates were obtained by transfer of 1-cell stage embryos into oviduct while late blastocysts (51.6% vs. 66.7%; P<0.01) into uterus. The pregnancy rates when 3 embryos were transferred to recipients were significantly higher than when 2 embryos we.e transferred (47.6% vs. 27.0%; P<0.05). Although there were no significant difference among the group, adhesion of reproductive organs, uterine size, ovulation rate of recipients, presence of large follicle and difficulty of transfer affected pregnancy rate of recipient. Higher pregnancy rates were obtained in the recipients with diameter uterine horn as compared to the recipients with <5m diameter or >20mm diameter uterine hem (38.9%, 20% vs. 18.2%), in the recipients with large follicle in the ovulated ovary ipsilaterally (53.6% vs. 37.1%) and in the transfer which was carried out easily (39.2% vs. 27.8%, 0%). In conclusion, the high rate of pregnancy was achieved following transfer of pronuclear microinjected embryos when three or four 1-cell stage embryos were transferred into oviduct with stage corpus hemorrhagicum in the ovary of recipient which came into estrus naturally.

후두에 발생한 신경초종 1예

최윤석,전자호,권성우,김익수 대한이비인후과학회 2001 대한이비인후과학회지 두경부외과학 Vol.44 No.7

레이들 내 와류 형성에 미치는 노즐 편심도의 영향에 관한 수치해석

최윤석,서준원,이진형 ( Yun Suk Choi,Jun Won Suh,Zin Hyoung Lee ) 한국주조공학회 1998 한국주조공학회지 Vol.18 No.1

N/A In steel making process, vortices may develope during the tapping of steel from ladle to tundish which take down undesired slag in their core. If the slag is dispersed finely in the melt, it can flow down further into the mold and finally becomes inclusion in the steel. Therefore, the suppression of the vortex formation is very important in steel making process. One of the methods used to suppress the vortex formation is using nozzle eccentricity. In this study the flow field and the free surface change during the drainage of melt from ladle were analyzed numerically with a commercial FDM package, CFX-F3D, to find out the effect of nozzle eccentricity. This calculation results showed the suppression effect of vortex formation by nozzle eccentricity in agreement with experiment. (Received November 14, 1997)

분포형 강우-유출 모의를 위한 격자 네트워크 해석

최윤석,이진희,김경탁 한국수자원학회 2008 한국수자원학회논문집 Vol.41 No.11

유역의 강우-유출 현상을 분포형으로 모의하기 위해서는 삼각형 혹은 사각형 요소로 유역을 모형화하고 각 요소에서의 수문성분의 변화를 해석하여야 한다. 본 연구는 사각형 요소인 격자로 모형화된 유역에서의 강우-유출 현상을 1차원 운동파 방정식을 이용하여 모의할 때 각 격자에서 발생된 흐름의 추적을 위한 격자 네트워크 해석에 대해 수행하였다. 격자의 흐름방향은 D8-method(deterministic eight-neighbors method)에 의해 결정된 It needs to conceptualize watershed with triangular or rectangular elements and to analyze the changes in hydrological components of each element for distributed modeling of rainfall-runoff process. This study is the network analysis of watershed grid for

댐 하류 지점에 대한 분포형 모형의 적용성 평가

최윤석,김경탁,심명필 한국수자원학회 2009 한국수자원학회논문집 Vol.42 No.9

유역에서의 댐은 이수와 치수 측면에서 매우 큰 역할을 담당하고 있으며, 특히 집중호우 기간 동안의 댐 방류는 강우에 의해서 발생되는 유출과 더불어 댐 하류의 홍수조절에 직접적인 영향을 미치고 있다. 본 연구에서는 댐 방류와 강우에 의한 유출의 영향을 동시에 받는 댐 하류 지점에 대한 유출모의를 위해서 HyGIS (Hydro Geographic Information System) 환경에서 운영되는 분포형 강우-유출 모형인 GRM (Grid based Ra Dam has very important roles in both water use and flood control. Dam release and runoff from rainfall affect directly to the flood control at the downstream of dam during heavy storm especially. This study evaluates the applicability of a distributed mod

실라스틱 시트를 이용한 비중격 천공 재건술

최윤석,장태영,김보묵,최정석,김민욱 대한이비인후과학회 2006 대한이비인후과학회지 두경부외과학 Vol.49 No.5

Background and Objectives:In general, for surgical treatment of septal perforation, a suture repair method is necessary for atleast unilateral intranasal mucosal flap with the interposition of a connective tissue graft. However, autologous graft material issometimes insufficient when septal perforation repair is combined with other surgery such as rhinoplasty. The aims of this studywere to introduce a new repair technique of septal perforation using silastic sheet and to assess the usefulness of the new method.Subjects and Method:Between March 2003 and September 2004, 5 patients underwent septal perforation repair using silasticsheet with open rhinoplasty at the same time. Size and causes of septal perforation, symptoms, and complication were evaluatedby endoscopic examination and questionnaires pre- and postoperatively. Results:The causes of septal perforation were previousseptoplasty (3 cases), syphilis (1 case) and unknown (1 case). Preoperative symptoms including nasal obstruction, rhinorrhea,epistaxis and dryness were all improved postoperatively. The perforations of all patients were 1.0 cm sized or more indiameter. Four of five patients (80%) achieved complete closure and one patient had an incomplete closure after a mean followup of 16 months. Conclusion:The repair of septal perforation using silastic sheets is a very useful technique when the size ofseptal perforation is more than 1 cm large in diameter or when the autograft material is insufficient. (Korean J Otolaryngol2006;49:522-6)