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Yoo, Hye Sook,Eah, Jae-Yong,Kim, Jong Soo,Kim, Young-Jun,Min, Mi-Sook,Paek, Woon Kee,Lee, Hang,Kim, Chang-Bae Korean Society for Molecular Biology 2006 Molecules and cells Vol.22 No.3
<P>DNA barcoding, an inventory of DNA sequences from a standardized genomic region, provides a bio-barcode for identifying and discovering species. Several recent studies suggest that the sequence diversity in a 648 bp region of the mitochondrial gene for cytochrome c oxi- dase I (COI) might serve as a DNA barcode for identify- ing animal species such as North American birds, in- sects and fishes. The present study tested the effective- ness of a COI barcode in discriminating Korean bird species. We determined the 5' terminus of the COI bar- code for 92 species of Korean birds and found that spe- cies identification was unambiguous; the genetic differ- ences between closely related species were, on average, 25 times higher than the differences within species. We identified only one misidentified species out of 239 specimens in a genetic resource bank, so confirming the accuracy of species identification in the banking system. We also identified two potential composite species, calling for further investigation using more samples. The finding of large COI sequence differences between species confirms the effectiveness of COI barcodes for identifying Korean bird species. To bring greater reliability to the identification of species, increased in- tra- and interspecies sampling, as well as supplementa- tion of the mitochondrial barcodes with nuclear ones, is needed.</P>
Wrinkling control of inflatable booms using shape memory alloy wires
Yoo, Eun-Jung,Roh, Jin-Ho,Han, Jae-Hung Institute of Physics Publishing 2007 Smart materials & structures Vol.16 No.2
<P>An inflatable boom is a fundamental structural part of inflatable space structures maintaining the expected configuration of the whole system, supporting external loads and guaranteeing the efficiency of the membrane surface. The inflatable structure is a thin film structure compactly packaged and expanded to the desired configuration by the internal gas pressure. But the structures can be easily distorted and even collapsed by wrinkling. In this study, the behavior of an inflatable boom structure is investigated numerically and experimentally. To achieve a better bending strength, the methodology to control the wrinkling growth and the deformed configuration of the inflatable boom structure with a shape memory alloy (SMA) wire actuator is developed. To understand the nonlinear behavior of an inflatable boom due to wrinkling, the structure is numerically modeled using the ABAQUS finite element program with a wrinkling algorithm developed based on the Miller–Hedgepeth membrane theory. To verify the present analysis method, the inflatable boom made of Kapton film is examined by the bending tests with various internal pressures. To delay the growth of wrinkling that rapidly deteriorates the bending strength of the inflatable boom, a SMA wire actuator is applied. SMA wires are attached on the edge of the inflatable boom and generate a recovery force to remove wrinkling and restore the deformation of the boom. </P>
44-Homooligomycin E, a New Cytotoxic Macrolide Antibiotic from Streptomyces ostreogriseus
KIM, Hang Sub,BANG, Hee Jae,LEE, Sang Yong,Yoo, Ook Joon,YOO, Jin Cheol,KIM, Young Ho,LEE, Jung Joon 朝鮮大學校 1998 藥學硏究誌 Vol.19 No.2
Homooligomycin E (1) was isolated from the culture broth of Streptomyces ostreogriseus and its structure was analyzed on the basis of physicochemical and spectroscopic data. It showed strong cytotoxicity against several human tumor cell lines.
노마디즘을 기반으로 한 Mobile 갤러리에 관한 연구
오재란 ( Jae Ran Oh ),유진형 ( Jing Hung Yoo ) 한국공간디자인학회 2014 한국공간디자인학회논문집 Vol.9 No.4
(연구배경 및 목적) 시대가 변화함에 따라 갤러리의 패러다임이 변화 하고되고 교통과 정보 통신의 발달로 더 이상 미술관은 엘리트의 전유물 아니게 되었다. 일반대중 들의 문화의식의 성장은 일상의 예술화 예술의 일상화가 초래하게 된다. 본 연구의 목적은 이동하는 모바일 갤러리의 파빌리온을 연구하고. 미술관과 대중이 나아가 예술이 대중과 더욱 친밀하게 소통할 수 있도록 한다. (연구방법)노마디즘 의 탈영역적, 탈 경계적 개념을 기반으로 이론적 고찰을 한다. 파빌리온의 사례를 분석하고, 간편하게 이동가능 한 파빌리온이 대중과의 소통을 알아본다. (결과)모바일 갤러리파빌리온은 누구하고도 접촉할 수 있고 소통할 수 있다. 이러한 탈 경계의 화학적 변화를 일으키면 개념 자체가 달라진다. 육중한 건축에서 벗어나 이동 가능한 파빌리온은 대중과 일상의 예술로써 만남이 가능 해진다. 예술은 사람과 함께 숨 쉬고 살아가며 느끼는 것이다. 설치 작가, 건축가들의 예술적 디자인의 파빌리온은 또 하나의 볼거리를 대중들에게 제공한다. (Background and Purpose) As time changes, there is also a shift in a paradigm. Because of developments in transportation, information, and communication, the art museum is no longer the exclusive property of the elite. The growth of cultural awareness among the general public has led to generalization of the arts. The purpose of this particular research was to study pavilions of the mobile gallery, which allow interaction between the gallery, the arts, and the public. (Method) Theoretical consideration was based on the non-territorial and non-boundary concepts of nomadism. From an analysis of pavilions and communications with the public, the ease of use for the mobile art galleries was recognized. (Results) Mobile art galleries/pavilions facilitate communication and contact with the general public. The concept of the arts changes dramatically without boundaries. Pavilions eliminate the need for huge architectural structures and then bring art into the everyday lives of people. Art is present with people, creating joy. Pavilions that reflect the artistic design of architects and installation artists are public attractions.
44-Homooligomycin E, a New Cytotoxic Macrolide Antibiotic from Streptomyces ostreogriseus
KIM, Hang Sub,BANG, Hee Jae,LEE, Sang Yong,YOO, Ook Joon,YOO, Jin Cheol,KIM, Young Ho,LEE, Jung Joon 충남대학교 약학대학 의약품개발연구소 1997 藥學論文集 Vol.13 No.-
homooligomycin E (1) was isolated from the culture broth of Streptomyces ostreogriseus and its structure was analyzed on the basis of physicochemical and spectroscopic data. It showed strong cytotoxicity against several human tumor cell lines.
액체 로켓 터보 펌프 터빈의 천이 열전달 및 구조 해석
유재한(Jae-Han Yoo),최지훈(Ji-Hoon Choi),이인(In Lee),한재흥(Jae-Hung Han),전성민(Seong-Min Jeon),김진한(Jin-Han Kim) 한국항공우주학회 2004 韓國航空宇宙學會誌 Vol.32 No.3
유한요소법을 이용하여 액체 로켓 엔진 터보 펌프 터빈의 천이 열전달 및 구조 해석이 수행되었다. 해석 모델은 3차원 8절점 등매개변수 솔리드 요소로 구성되었으며, 전체 모델의 1/80만이 해석되었다. 열 스파이크를 포함하는 시동 조건과 정상상태에서의 하중이 고려되었다. 블레이드 면 위의 열전달 계수는 상용 열유동 해석 프로그램인 Fluent를 이용하였다. 개발된 유한 요소 코드를 이용하여 시동 및 정상상태에서 천이 열전달 응답을 구하였다. 또한, 원심력과 열하중이 가해질 때, 최대 응력 및 슈라우드의 변위를 구하였다. Thermal and structural finite element analyses were performed for the turbopump turbine bladed disk model with shroud of a liquid rocket engine. The only 1/80 part model was analyzed which consists of 3D eight node isoparametric solid elements. The applied loading history consists of a startup condition with a thermal spike and a steady state. Heat transfer coefficient on the blade was predicted using the commercial Navier-Stokes solver, Fluent. Transient thermal responses during startup and steady states were calculated using a 3D finite element code developed. Maximum stress and shroud tip displacement under the influence of centrifugal and thermal loading were also determined.