수직력하에서 임프란트 나사형태에 따른 응력의 3차원 유한요소법적 분석

김우택,차용두,오세종,박상수,김현우,박양호,박준우,이건주,Kim, Woo-Taek,Cha, Yong-Doo,Oh, Se-Jong,Park, Sang-Soo,Kim, Hyun-Woo,Park, Yang-Ho,Park, Jun-Woo,Rhee, Gun-Joo 대한구강악안면외과학회 2001 대한구강악안면외과학회지 Vol.27 No.2

There are three designs of thread form in screw type implants: V-thread, Reverse buttress thread and Square thread. The purpose of this study was to find out how thread form designs have an influence on the equivalent stress, equivalent strain, maximum shear stress and maximum shear strain and which design of thread form generates more maximum equivalent stress and strain. 3-D finite element analysis was used to evaluate the stress and strain patterns of three tread types. The results of this study were as follow. 1. Under the 200N of axial load, the value of maximum equivalent stress is smallest in square thread and there is no significant difference between that of V thread and reverse buttress thread. 2. Under the 200N of axial load, the value of maximum equivalent strain is largest in V thread and smallest in square thread. 3. Under the 200N of axial load, the value of maximum shear stress is smallest in square thread and there is no significant difference between that of V thread and reverse buttress thread. 4. Under the 200N of axial load, the value of maximum equivalent strain is largest in V thread and there is no significant difference between that of square thread and reverse buttress thread. 5. Above results show that the square thread has special advantages in stress and strain compared with other thread types, especially in shear stess which is most determinant to implant-bone interface. Considering the superior biomechanical properties of square form implant, we presume that square form implant has better clinical results than the other types of implants in the same clinical conditions.

축산물 잔류 sulfadimethoxine 검출용 ELISA kit 개발

김우택,김성희,윤병수,임윤규,Kim, Woo-taek,Kim, Seong-hee,Yoon, Byoung-su,Lim, Yoon-kyu 대한수의학회 2000 大韓獸醫學會誌 Vol.40 No.3

An enzyme linked immunosorbent assay (ELISA) was developed to screen residues of sulfadimethoxine (SDM) in edible animal products. An indirect competitive ELISA was allowed to compete with rabbit anti-SDM for binding to a limited amount of SDM-gelatin conjugate and SDM in serum samples. Sera was diluted 20 times with phosphate buffered saline (PBS) and boiled for 5 minutes to destruct immunoglobulins of serum. Detection limit of this competitive ELISA for SDM was 0.1 ppb or less. Among eight sulfonamide analogues tested for specifity, only sulfamonomethoxine showed significant cross-reaction in the assay. The EC-50 value for sulfamonomethoxine was 3.5 ppm. Recovery of SDM in spiked serum samples between 100 ppb and 500 ppb ranged from 110.7% to 128.9%.

오리의 Uropygial Gland 에서 분리한 Glucose - 6 - phosphate Dehydrogenase Isozyme 의 Kinetic 특성

김우택,서경훈,김유삼 ( Woo Taek Kim,Yyong Hoon Seo,Yu Sam Kim ) 생화학분자생물학회 1984 BMB Reports Vol.17 No.4

One isozyme of glucose-6-phosphate dehydrogenase with pI of 6.6 was purified from the uropygial gland of Peking duck and its kinetic properties were examined. The reaction by the enzyme followed ordered bi-bi reaction mechanism which was also detected in the reaction by the purified liver G6-PD of the same duck. Km values to G-6-P and NADP+ for the gland G6-PD were 101 μM and 4. 41 μM, respectively. And for the liver enzyme, Km to G-6-P was 76.92 μM and to NADP+ was 9.09 μM. Km to substrate analogs, galactose-6-phosphate and 2-deoxy-D-glucose-6-phosphate, for the gland enzyme were 6.7×10³ ACM and 3.65×10³ μM, respectively. NAD+ was not used as a coenzyme by the gland even though its concentration was raised up to 9. 7 mM. NADPH, a product of the enzyme reaction, was competitive inhibitor to NADP+ with Ki of 42.5 μM for the gland enzyme. On the other hand, that Ki of the liver enzyme was 25 μM. For the gland enzyme, glucosamine-6-phosphate was an uncompetitive inhibitor to NADP+ and ATP was a noncompetitive one. These results, the high substrate affinity and high Ki value of NADPH for the gland enzyme, indirectly indicated that the gland G-6-PD was well designed enzyme for the active and continuous production of surface-lipids in the uropygial gland.

벼 배유세포에서 (胚乳細胞) 분리된 미크로좀 내로의 저장 (貯藏) 단백질 이동

김우택,Xingxiang Li,Thomas W . Okita (Woo Taek Kim) 한국식물학회 1994 Journal of Plant Biology Vol.37 No.3

Developing rice endosperm cells display two morphologically distinct rough endoplasmic reticulum (ER) membranes, the cisternae ER (C-ER) and the protein body ER (PB-ER), the latter delimiting the prolamine protein bodies. We (Li et al., 1993) have recently shown that the storage protein mRNAs are not randomly distributed on these ER types; the C-ER is enriched for glutelin mRNAs, whereas the PB-ER harbors predominantly prolamine transcripts. To address whether these ER types have different capacities to translate these mRNAs and translocate their proteins into the lumen, a microsomal fraction enriched in C-ER vesicles was prepared from developing rice seeds When present in an in vitro translation system, the microsomes were able to proteolytically remove the signal peptide and internalize both preproglutelin and preprolamine within the microsomal vesicles. Of the two species, preprolamine was more effectively translocated and processed. These results suggest that the C-ER has the capacity to recognize and bind both storage protein mRNAs during protein synthesis. Moreover, efficient translocation and processing of glutelin requires additional factors that are deficient or absent in the in vitro system.

토빈 Q와 대체적(代替的) 성과측정변수(成果測定變數)와의 관계(關係)

김우택,장대홍,김경수,박상수,Kim, Woo-Taek,Jang, Dae-Hong,Kim, Gyeong-Su,Park, Sang-Su 한국재무관리학회 1996 財務管理硏究 Vol.13 No.1

기업의 경제적 성과측정 또는 경제적 척도로서 토빈의 Q는 가치에 대해 산출된 경제적 가치를 계산함으로써 이론적인 경제적 효율성의 개념에 가장 근접한 개념으로 평가되고 있다. 그러나 정확한 계산이 어려운 토빈의 Q대신 실제로는 회계적 수익률, 주가 수익률 및 장부가격 대비 시장가치 비율(MB)등이 편의상 많이 사용되고 있다. 본 논문에서는 이러한 성과 측정 변수들간의 상관관계를 실증적으로 검증함으로써 이들 세 유형의 변수들이 토빈 Q의 대용적(代用的) 변수(變數)로서 신뢰성과 유용성이 있는지를 판정하고자 하였다. 연구 결과는 MB를 제외하고는 이들 변수들이나 또는 이들의 조합이 토빈 Q비율을 충분히 설명하기에는 너무 미흡하여 토빈 Q의 대용변수로서 경제적 효율성의 판단기준으로 사용될 경우에 그 신뢰성에 의문이 제기될 여지가 있음을 시사하고 있다. 특히, 회계적 수익률은 토빈 Q비율에 대한 설명력이 현저히 낮을 뿐 아니라, 이러한 결과는 수익률의 이동평균을 사용하거나, 연구개발비나 계열기업집단의 소속여부에 의해 잠재적인 무형자산의 영향을 반영할 수 있도록 수익률을 보완하여 사용하더라도 그 설명력이 크게 개선되지 않는 것으로 나타나고 있다.

11세기 대거란(對契丹) 영역 분쟁과 고려(高麗)의 대응책

김우택 ( Woo Taek Kim ) 서울대학교 국사학과 2009 韓國史論 Vol.55 No.-

국내 노인의 인지건강관리 중재에 관한 체계적 분석: 작업치료 서비스 형태에 대한 제언

김우택 ( Woo Taek Kim ),김은정 ( Eun Jung Kim ),용미현 ( Mi Hyun Yong ),오혜원 ( Hye Won Oh ) 한국고령친화건강정책학회 2010 대한고령친화산업학회지 Vol.2 No.2

연구목적: 본 연구는 국내에서 연구된 노인 인지기능의 향상이나 유지에 대한 실제적 노력들을 살펴보고, 재활의료 서비스 영역뿐만 아니라 일반 건강증진 서비스 형태로서의 작업치료적 접근을 모색하고자 수행하였다. 연구방법: 본 연구는 Narrative synthesis를 통하여 Systematic review를 수행하였다. 2010년 4월 22일 한국학술정보논문검색서비스(KISS)와 국회도서관, 국립중앙도서관의 자료검색 서비스를 통해 연구주제에 대하여 검색하여 KISS에서 261건, 국회도서관에서 1,356건, 국립중앙도서관에서 1,431건이 검색되었으나 선별 과정을 거쳐 총 24건의 연구가 최종 분석 대상으로 선정되었다. 검색어는 ``노인``과 ``인지``였다. 연구결과: 조사 대상 연구들은 실제적 중재를 통한 실험적 연구 결과들로서 연구 대상은 총 1,015명이었고, 그 중 연구 대상의 성별을 명시하지 않은 6개의 연구 결과를 배제한 나머지 연구의 연구 대상 799명 중 남성 노인의 비율은 총인원 141명으로 17.6%이고 여성 노인은 총인원 658명으로 82.4%에 해당하였다. 고찰 및 결론: 국내에서 연구된 사례들 중 인지기능에 유의한 효과를 미치는 것으로 보고 된 결과는 주로 체육활동이 인지기능에 미치는 효과를 증명하였다. 정신적 활동, 지각, 감각작용 등의 다각적 접근을 제공하는 작업치료는 서비스 수혜 대상에게 더욱 적극적이고 효율적인 참여와 결과를 유도할 수 있다. 따라서 노인장기요양보험제도가 도입된 상황에서 치료 중재뿐만 아니라 전문적인 상담이나 다각적 프로그램을 개발하고 제공하여 국내의 작업치료 영역의 확대와 변화가 필요하다. Purpose: This research concentrated on domestic studies of cognitive function improvements or preservations of eldery and the occupational therapy as the health management service not only the rehabilitative medical intervention. Research Method: The present study executed the systematic review through the narrative synthesis. The theme of research was searched through the database of the Korean Studies Information Service System(KISS), the National Assembly Library and the National Library of Korea. Through a selective process, 24 researches were selected as the subjects for the final analysis. Key words were ``elderly`` and ``cognition.`` Research Results: The studies for the investigation were the experimental results gained through actual mediation for the total number of subjects to be 1,015 people and amongst them, 6 research results were excluded for not indicating the gender for a total of 799 people. Amongst the 799 people, the male gender occupied 17.6% with 141 people and the females occupied 82.4% with 658 people. Conclusion: The results reported to make significant effects on the cognitive functions were mainly physical activities to prove the effects placed on the cognitive functions with the physical activities. However, for inducing more active and efficient participation and results to the subjects benefiting from the occupational therapy services, it is required to expand and establish the occupational therapy field of Korea by developing and providing the multilateral programs.

贈與稅의 國際的 二重課稅의 완화

金宇澤(Woo Taek Kim) 한국세법학회 1997 조세법연구 Vol.3 No.-

주산기 가사의 임상 양상과 예후

김우택 ( Woo Taek Kim ) 대한주산의학회 2005 Perinatology Vol.16 No.3

조직사회화 효과성에 영향을 미치는 리더십과 기업 하부문화의 역할

김우택(Woo Taek Kim),김인호(In Ho Kim) 한국경영사학회 1999 經營史學 Vol.20 No.-

This study investigated the role of leadership and organizational subculture to enhance the effectiveness of corporate culture through organizational socialization used by 23 korean firms. On the basis of literature review, five hypotheses were established and analyzed empirically. Empirical analyses of 23 korean firms revealed that : 1) strong socialization make strong culture, 2) strong socialization improve the members’ satisfaction, committment, and it reduce separation orientation, 3) when leaders give careful consideration to followers and subculture isn’t show hostility, the relationship between corporate culture and organizational effectiveness is positive. Implications for managers and further research are suggested.