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      • KCI등재

        테니스 포핸드 스트로크 시 오픈스탠스의 족저압력분포의 변화

        최지영,김승재,이의린 한국운동역학회 2005 한국운동역학회지 Vol.15 No.1

        J. Y. CHOI, S. J. KIM, E. L. LEE. Change of Plantar Pressure Distribution of Open Stance during Forehand Stroke M Tennis. Korean Journal of Sport Biomechanics, Vol. 15, No. 1, pp. 143-153, 2005. Recently among several tennis techniques forehand stroke has been greatly changed in the aspect of spin, grip and stance. The most fundamental factor among the three factors is the stance which consists of open, square and close stance and it is very important to know the patterns of plantar pressure distribution for the better understanding of forehand stroke. Therefore, the purpose of this study was to investigate the change of plantar pressure distribution in open stance during forehand stroke in tennis. Three high school tennis players were recruited for the study and required to perform forehand stroke five consecutive trials in the condition of open stance. The forehand strokes were filmed with two digital video cameras and measured with pedar system for plantar pressure. The plantar regions under the foot were divided into 3 regions, which were forefoot, midfoot, and rear foot. In conclusion, The plantar pressure of open stance during forehand stroke was distributed more largely to the right foot. The plantar pressure of open stance during forehand stroke was distributed more weight loads on forefoot of right than heel of right

      • KCI등재
      • 설계 자동화를 위한 하드웨어 할당 알고리듬

        최지영,인치호 世明大學校 1998 世明論叢 Vol.7 No.-

        This thesis proposes a new hardware allocation algorithm for design automation. The proposed algorithm works on scheduled input graph and simultaneously allocates binds functional units, interconnections and registers by considering interdependency between operations and storage elements in each control step, in order to share registers and interconnections connected to functional units, as much as possible. This thesis shows the effectiveness of the algorithm by comparing the results of our experiments with those of exiting system.

      • KCI등재
      • KCI등재

        A study of surface quality and mechanical strength in 5083 aluminum alloy plates using pulsed laser cleaning

        Ji Lin,Chunming Wang 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.10

        In this work, pulsed laser cleaning was conducted on 5083 aluminum alloy plates for removing the oxide film and improving the surface quality. The chroma was innovatively introduced to evaluate the surface quality of cleaned samples. Samples with good cleaning quality were successfully achieved by means of process optimization involving single factor and orthogonal laser cleaning tests. The optimum cleaning parameters for desirable effect consisted mainly of average power of 40 W, scanning speed of 2500 mm/s and repetitive frequency of 85 kHz. On this basis, a well-formed welded joint can be obtained because of the removal of the oxide film on the surface of aluminum alloy. It has been found that the maximum stress and strain of joints subjected to laser cleaning were up to 102.5 % and 114.81 % of joints laser welded in the absence of laser cleaning, respectively. Significant improvement in mechanical strength was mainly attributable to effective suppression of porosities in welds on account of the removal of oxides with the assist of pulsed laser cleaning.

      • KCI등재

        Associations of TNF-RII rs1061622 With Post-Traumatic Stress Disorder and Their Interplays on Serum Lipids Levels in Adolescents

        Ji Cheng Zhang,Jin Hua Wang,Jun Yi Liu,Qi Wei Guo,Jia Lin,Yi Lin Shen,Ke Xin Jia,Jia Jing Cai,Guo Ming Su,Ding Zhi Fang 대한신경정신의학회 2023 PSYCHIATRY INVESTIGATION Vol.20 No.11

        Objective To verify effects of rs1061622 at tumor necrosis factor-α receptor II (TNF-RII) gene (<i>TNF-RII</i>) on post-traumatic stress disorder (PTSD) and its interactive effects with PTSD on serum lipids levels in adolescents.Methods PTSD was measured by PTSD Checklist-Civilian Version (PCL-C) in 699 adolescent survivors at 6 months after Wenchuan earthquake in China. A polymerase chain reaction and restriction fragment length polymorphism assay were utilized for <i>TNF-RII</i> rs1061622 genotyping followed by verification using DNA sequencing. Serum triglycerides (TG), total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), and low-density lipoprotein cholesterol were tested using routine methods.Results G (deoxyguanine) allele carriers had higher PCL-C scores than TT (deoxythymidine) homozygotes in female subjects. Female adolescents had higher PCL-C scores than male subjects in TT homozygotes. Predictors of PTSD prevalence and severity were different between G allele carriers and TT homozygotes. Subjects with PTSD had lower TG, TG/HDL-C, TC/HDL-C, and higher HDL-C than adolescents without PTSD in male G allele carriers. G allele carriers had higher TG/HDL-C and TC/HDL-C than TT homozygotes in male adolescents without PTSD, and lower TG and TG/HDL-C in male PTSD patients. G allele carriers had higher TG than TT homozygotes only in female adolescents without PTSD.Conclusion These results suggest reciprocal actions of <i>TNF-RII</i> rs1061622 with other factors on PTSD severity, interplays of <i>TNF-RII</i> rs1061622 with PTSD on serum lipid levels, and novel treatment strategies for PTSD and comorbidities of PTSD with hyperlipidemia among adolescents with different genetic backgrounds of <i>TNF-RII</i> rs1061622 after experiencing traumatic events.

      • KCI등재

        May Fourth: A Patriotic Movement of Cosmopolitanism

        ( Ji Lin Xu ) 성균관대학교 동아시아학술원 2009 Sungkyun Journal of East Asian Studies Vol.9 No.1

        The May Fourth Movement, which occurred ninety years ago in 1919, has long been characterized as a patriotic event in textbooks and mainstream media, a collective memory to be refreshed and glorified periodically. The author seeks to characterize what kind of patriotism it was and its relationships with the cosmopolitanism, social regeneration, and individualism of the New Culture Movement of the period. The May Fourth Movement, after turning into a social movement, would inevitably become more ideology-driven and more political. Post-1922 fervor for politics, having emerged from the New Cultural Movement, had a distinctive doctrinal commitment and was fueled by specific ideology. But after 1922, in the wake of the upheaval of the May Fourth Movement and the continuous social movements, all social classes became dissatisfied with the warlord rule and the Beiyang government. The catalyzing effects of both ideology and social movement paved the way for the Nationalist Revolution. Like the May Fourth Movement, the Nationalist Revolution had its catalyst, which was nothing other than the consciousness of nationalism, being suppressed by the cosmopolitanism of the May Fourth period. What is stressed here is that social movement was not cultural movement. New Culture Movement could simply import theories and tolerate diversity, but a social movement needed mass mobilization and the propagation of ideas.

      • <i>In Situ</i> Activation of Nitrogen-Doped Graphene Anchored on Graphite Foam for a High-Capacity Anode

        Ji, Junyi,Liu, Jilei,Lai, Linfei,Zhao, Xin,Zhen, Yongda,Lin, Jianyi,Zhu, Yanwu,Ji, Hengxing,Zhang, Li Li,Ruoff, Rodney S. American Chemical Society 2015 ACS NANO Vol.9 No.8

        <P>We report the fabrication of a three-dimensional free-standing nitrogen-doped porous graphene/graphite foam by <I>in situ</I> activation of nitrogen-doped graphene on highly conductive graphite foam (GF). After <I>in situ</I> activation, intimate “sheet contact” was observed between the graphene sheets and the GF. The sheet contact produced by <I>in situ</I> activation is found to be superior to the “point contact” obtained by the traditional drop-casting method and facilitates electron transfer. Due to the intimate contact as well as the use of an ultralight GF current collector, the composite electrode delivers a gravimetric capacity of 642 mAh g<SUP>–1</SUP> and a volumetric capacity of 602 mAh cm<SUP>–3</SUP> with respect to the whole electrode mass and volume (including the active materials and the GF current collector). When normalized based on the mass of the active material, the composite electrode delivers a high specific capacity of up to 1687 mAh g<SUP>–1</SUP>, which is superior to that of most graphene-based electrodes. Also, after ∼90 s charging, the anode delivers a capacity of about 100 mAh g<SUP>–1</SUP> (with respect to the total mass of the electrode), indicating its potential use in high-rate lithium-ion batteries.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2015/ancac3.2015.9.issue-8/acsnano.5b03888/production/images/medium/nn-2015-03888k_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn5b03888'>ACS Electronic Supporting Info</A></P>

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