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Exception Handling in Defense Industry Logistics Process Using Process Repository
Choi,Doug Won,Shin,Jin Gyu 韓國防衛産業學會 2010 韓國防衛産業學會誌 Vol.17 No.1
일상적인 상황에서 방위산업에 관련된 물류관리의 중요성은 일반 산업에 비하여 크지 않으나, 예외적인 상황이 발생했을 때에는 신속한 해결책을 찾아내어 문제를 해결하지 않으면 국방에 있어서 전략적 공백으로 이어질 수 있다. 그러므로 예외상황에 대한 신속한 대비책을 구축하는 것이 필요하며 본 논문에서는 업무절차관리(BPMS) 시스템을 도입하여 물류 프로세스의 지속적인 개혁 및 개선을 유도한다. 이를 위하여 프로세스 저장소의 사용을 제안하며, 예외발생시 신속한 처리방안을 검색하기 위한 검색트리의 사용방법론을 제시한다. 획일적인 업무처리가 강조되는 군사작전 및 방위산업의 환경 하에서 예외상황의 처리를 위한 효율적 장치를 마련하는 것은 방산운용의 측면에서 매우 중요하다. 본 논문에서는 특히 지식경영의 관점에서 예외처리 시 생성되는 새로운 프로세스 지식을 프로세스 저장소(process repository)에 저장하고, 예외발생시 이 문제의 해결에 적합한 프로세스를 저장소에서 신속하게 검색하는 데 활용할 수 있는 검색트리의 생성과 활용에 대한 방법론을 연구하였다. 검색트리의 생성과 활용을 위하여 ‘상황변수’와 ‘의사결정변수’의 개념을 새로 도입함으로써 문제의 상황을 체계적으로 기술하고 저장 및 검색하는 방편을 제시하였으며, 예외상황의 인식능력(context awareness)을 제고시켰다. 정보의 엔트로피를 기초로 한 C5.0 알고리즘을 적용하여 정보이득을 최대화하는 검색트리를 생성하는 방법을 제시하였다.
Choi, Chel-Jong,Kang, Seung-Min,Hong, Hyo-Bong,Lee, Soo-Hyung,Kim, Jin-Gyu,Ahn, Kwang-Soon,Yoon, Jong-Won The Japan Institute of Metals 2010 MATERIALS TRANSACTIONS Vol.51 No.4
<P>We fabricated metal-oxide-semiconductor (MOS) devices with a high-k Er-silicate gate dielectric, and demonstrated their electrical performance. The increase in the rapid thermal annealing (RTA) temperature leads to a reduction of the equivalent oxide thickness (EOT), which is attributed in par to the thickness evolution of Er-silicate film and to the chemical bonding change from an Si-rich to an Er-rich silicate. The <I>in-situ</I> investigation of the interfacial reaction between the Er and SiO<SUB>2</SUB> film using a high-voltage electron microscopy (HVEM) revealed a linear relationship between the squared thickness of Er-silicate layer and <I>in-situ</I> annealing time, indicating that the Er-silicate growth is a diffusion-controlled process. The parabolic growth constants of the Er-silicate film were calculated to be 2.3×10<SUP>−16</SUP> and 9.3×10<SUP>−16</SUP> cm<SUP>2</SUP>/s for <I>in-situ</I> annealing temperatures of 350 and 450°C, respectively.</P>
Choi, Won Jun,Park, Jae Gyu,Yoo, Su Jeong,Kim, Hea Ok,Moon, Hyung Ryong,Chun, Moon Woo,Jung, Young Hoon,Jeong, Lak Shin 梨花女子大學校 藥學硏究所 2001 藥學硏究論文集 Vol.- No.10
We developed a new synthetic emthodology to the key intermediates (-)-5 and (+)-5 usnign ring-closing metathesis(RCM) reaction as a key step starting from the cheap and commercially available D-isoascorbic acid. These intermediates represent convenient synthons for the synthesis of D-and L-carbocyclic nucleosides, respectively. Finally, our procedure highlights mild reaction conditions, no epimerization, no enzymatic resolution, and improved overall yeilds when compared to the previously published procedures.
Choi, Young-Jin,Jeong, Ji-Hwa,Ha, Jin-Ho,Cho, Gyu-Bong,Cho, Kwon-Koo,Ryu, Kwang-Sun,Kim, Ki-Won Royal Swedish Academy of Sciences 2010 Physica scripta Vol.2010 No.t139
<P>Li–Fe–S ternary metal sulfide (lithium iron sulfide) powder was synthesized by the molten salt method. The physical and electrochemical properties of synthesized lithium iron sulfide were also investigated. From the results of XRD analysis, the chemical composition of synthesized lithium iron sulfide powder was Li<SUB>1.7</SUB>Fe<SUB>1.17</SUB>S<SUB>2</SUB> with a hexagonal crystal structure. The Li/Li<SUB>1.7</SUB>Fe<SUB>1.17</SUB>S<SUB>2</SUB> cell showed a first charge capacity of 153 mAh g<SUP>−1</SUP>-Li<SUB>1.7</SUB>Fe<SUB>1.17</SUB>S<SUB>2</SUB>, corresponding to 48% of theoretical capacity. To understand the charge/discharge reaction behaviors of the Li/Li<SUB>1.7</SUB>Fe<SUB>1.17</SUB>S<SUB>2</SUB> cell, Li/FeS<SUB>2</SUB>,Li/Fe and Li/AB cells were tested. From these results, the charge/discharge mechanism of the Li/Li<SUB>1.7</SUB>Fe<SUB>1.17</SUB>S<SUB>2</SUB> cell was suggested.</P>
Model schematics of carbon-nanotube-based-nanomechanical-tuner using piezoelectric strain
Won Kang, Jeong,Kim, Ki-Sub,Ryang Byun, Ki,Kang, Eu-Seok,Lee, Junha,Kuen Kwon, Oh,Gyu Choi, Young,Hwang, Ho Jung Elsevier 2010 Physica E, Low-dimensional systems & nanostructure Vol.42 No.7
<P><B>Abstract</B></P><P>Model schematics of a carbon-nanotube-based frequency tuner are presented and their vibration frequencies are analyzed by theoretical approaches such as classical molecular dynamics simulations and the continuum model equation. Outertube’s position displacement by a piezoelectric strain of a piezoelectric material induces the change of the vibrating carbon nanotube length. The desired frequencies are achieved by manipulating the electric potential applied to the piezoelectric material.</P>
Choi, Jung-Won,Park, Choon-Sik,Hwang, Minyoung,Nam, Hye-Young,Chang, Hun Soo,Park, Seong Gyu,Han, Bok-Ghee,Kimm, Kuchan,Kim, Hyung Lae,Oh, Bermseok,Kim, Yeonjung Elsevier 2008 The Journal of allergy and clinical immunology Vol.122 No.6
<P><B>Background</B></P><P>CXCR3 is a chemokine receptor that plays important roles in mediating chemotactic signals and modulating the activation of lymphocytes. We have previously conducted a case-control study by using a candidate gene approach to investigate the association of <I>CXCR3</I> polymorphisms with the risk of asthma. Results from the epidemiologic study showed that a common nucleotide variant in the <I>CXCR3</I> intron <I>(rs2280964G>A)</I> was associated with disease susceptibility (1006 cases and 384 control subjects; odds ratio, 0.81; 95% CI, 0.69-0.94; <I>P</I> = .007).</P><P><B>Objective</B></P><P>The aim of our study was to evaluate the epidemiologic study and provide functional evidence for the association of <I>rs2280964G>A</I> with asthma by investigating the effects of intronic variant on chemokine-mediated phenotypes of human-derived T cells.</P><P><B>Methods</B></P><P>We used cell line–based <I>in vitro</I> and human primary T cell–based <I>ex vivo</I> studies to examine the functional consequences of the intronic polymorphism, focusing on the regulation of gene expression, splicing, and immune responsiveness toward activating signals.</P><P><B>Results</B></P><P>We present functional evidence indicating that the <I>rs2280964A</I> allele significantly correlates with decreased <I>CXCR3</I> gene expression, which would lead to variation in immune cell responses to chemokine-cytokine signals <I>in vitro</I> and <I>ex vivo</I> that includes a decrease in chemotactic activity.</P><P><B>Conclusion</B></P><P>These findings, in conjunction with those of our previous epidemiologic studies, might implicate a functional link between a common nucleotide variant of a chemokine receptor gene, <I>CXCR3</I>, and a cause for a complex-trait disease, asthma.</P>