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손원희(W.H Sohn),최진환(J.H. Choi),이순걸(S.G Lee),박동창(D.C. Park),류한식(H.S. Ryu),배대성(D.S. Bae),허건수(K.S. Huh) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.5_2
An experimental study of dynamic track tension for high mobility tracked vehicle is investigated and compared to multibody dynamic simulation model. This research focuses on a heavy military tracked vehicle which has sophisticated suspension and rubber bushed track systems in computer model of the track tension. In order to obtain accurate dynamic track tension of track subsystems, each track link is modeled as a body which has six degrees of freedom. A compliant bushing element is used to connect track links. Various virtual proving ground models of Chang-Won proving ground are developed to observe dynamic changes of the track tension. The obtained empirical results of the dynamic track tension are comparcd against the simulation studies. <r.B.7]~%<>1 : Tracked Vehicle{;>~£,"j-"J), Trnck Link(;>~£"83), Dynamic Trnck Tension(%"'1 ;>~£"J-;;:j), Compliant Bushing (%<;! .!J!.>-J), DTJS("J-;;:j ~;;<.j A16 ',iJ)
BRIEF REPORTS ON KAISTSAT-4 MISSION ANALYSIS
J. Seon,K. I. Seon,S. H. Kim,K. W. Min,B. J. Kim,R. C. K. Yong,L. F. Leong,H. J. Chun,H. S. Chang,H. S. Kim,J. S. Bae,Y. W. Choi,S. R. LEE,Y. H. Shin,K. S. Ryu,J. J. Lee,D. H. Lee,D. J. Park 한국우주과학회 2000 Journal of Astronomy and Space Sciences Vol.17 No.2
유병우(B.W. Ryu),한정만(J.M. Han),이동욱(D.W. Lee),이종달(J.D. Lee),이병희(B.H. Lee),최성욱(S.W. Choi),문건우(G.W. Moon) 전력전자학회 2009 전력전자학술대회 논문집 Vol.2009 No.1
최근 LCD 모니터, Note PC, 가정용 게임기, Mobile Phone, MP3 등의 소형 전자 제품의 사용이 증가함에 따라 이들 전자제품의 전원 공급에 필요한 다양한 AC/DC 어댑터가 요구된다. AC/DC 어댑터는 밀폐형의 구조를 가지므로, 열적인 문제 때문에 용량과 사이즈가 제한되어 왔다. 하지만 최근에는 소형전자제품의 용량이 점차 증가하고, 더불어 소비자의 휴대성 및 심미적 요구에 부응하기 위하여 소형 및 경량의 고밀도 AC/DC Adapter를 개발하여야 한다. 이를 위해서 높은 수준의 회로 설계 및 방열 기술이 필요하다. 본 논문에서는 Laptop PC에 적용되는 85W급 AC/DC Adapter용 고밀도전원을 개발하고 실험으로 검증하였다.
Park, S R,Kong, S-Y,Nam, B-H,Choi, I J,Kim, C G,Lee, J Y,Cho, S J,Kim, Y W,Ryu, K W,Lee, J H,Rhee, J,Park, Y-I,Kim, N K Nature Publishing Group 2011 The British journal of cancer Vol.104 No.7
<P><B>Background:</B></P><P>We evaluated the association between polymorphisms of cytochrome P450 2A6 (<I>CYP2A6</I>)/excision repair cross-complementation group 1 (<I>ERCC1</I>)/X-ray repair cross-complementing group 1(<I>XRCC1</I>) and treatment outcomes of metastatic gastric cancer (MGC) patients treated with S-1/cisplatin.</P><P><B>Methods:</B></P><P>Among MGC patients (<I>n</I>=108), who received S-1 (40 mg m<SUP>−2</SUP> b.i.d., days 1–14) and cisplatin (60 mg m<SUP>−2</SUP>, day 1) every 3 weeks, we analysed the wild-type allele (<I>W</I>) and variants (<I>V</I>) of <I>CYP2A6</I> (<I>*4</I>, <I>*7, *9, *10</I>), and the polymorphisms of <I>ERCC1</I> (rs11615, rs3212986) and <I>XRCC1</I> (rs25487).</P><P><B>Results:</B></P><P>Patients having fewer <I>CYP2A6</I> variants had better response rates (<I>W</I>/<I>W vs W</I>/<I>V</I> other than <I>*1/*4 vs V</I>/<I>V</I> or <I>*1/*4</I>=66.7 <I>vs</I> 58.3 <I>vs</I> 32.3% <I>P</I>=0.008), time to progression (TTP) (7.2 <I>vs</I> 6.1 <I>vs</I> 3.5 months, <I>P</I>=0.021), and overall survival (23.2 <I>vs</I> 15.4 <I>vs</I> 12.0 months, <I>P</I>=0.004). <I>ERCC1 19442C</I>><I>A</I> (rs3212986) was also associated with response rate (<I>C/C</I>, 46.7% <I>vs C/A</I>, 55.3% <I>vs A/A</I>, 87.5%) (<I>P</I>=0.048) and TTP (4.4 <I>vs</I> 7.6 <I>vs</I> 7.9 months) (<I>P</I>=0.012). Patients carrying both risk genotypes of <I>CYP2A6</I> (<I>V</I>/<I>V</I> or <I>1/*4</I>) and <I>ERCC1 19442C</I>><I>A</I> (<I>C/C</I>) <I>vs</I> those carrying none showed an adjusted odds ratio of 0.113 (<I>P</I>=0.004) for response, and adjusted hazard ratios of 3.748 (<I>P</I>=0.0001) for TTP and 2.961 (<I>P</I>=0.006) for death.</P><P><B>Conclusion:</B></P><P>Polymorphisms of <I>CYP2A6</I> and <I>ERCC1 19442C</I>><I>A</I> correlated with the efficacy of S-1/cisplatin.</P>
Ryu, B.G.,Kim, K.,Kim, J.,Han, J.I.,Yang, J.W. Elsevier Applied Science 2013 Bioresource technology Vol.129 No.-
In the present study, spent yeast from a brewery was used as the growth substrate for the docosahexaenoic acid (DHA)-rich microalga, Aurantiochytrium sp. KRS101. A significant biomass yield (6.69g/l/d) was obtained using only spent yeast as the growth substrate, with simple stirring as pretreatment. Maximization of nutrient utilization through the use of stepwise cultivation increased the yield to 31.8g/l of biomass. DHA constituted 38.2% (w/w) of the total fatty acids, and the highest DHA productivity was observed when the C/N ratio was 20:1 (w/w). Spent yeast thus served as a good growth substrate for the production of DHA. Economic assessment revealed that stepwise cultivation using spent yeast as either the sole growth substrate or as a nutrient source could substantially reduce the production cost of microalgal DHA.