韓國氣功 定立을 위한 方向設定에 관한 硏究

金永明,金相奎,申舜植 동아대학교 스포츠과학연구소 2000 스포츠科學硏究論文集 Vol.18 No.-

Qigong is on the developmental stage and is expanding to the entire world, while it acknowsedges to the West as a universial method of human healthy-longevity. The conception of health known to thr west is based on the providence of modem civilization and science focusing on the physical practices, however, which usually limit the projected effective execution itself. Recently the eastern method of more effective physical-mental training was explored and by which is replaced for the human-healthy longevity in human life. The western standard form and its criterion was established through researches done by the scheme of biological-medical science, effectively it is revolutionizing forward the the eastern medical science as a formal integration of psychology, physiology and the social environmental elements. According to the eastern thought human life is a unified form of mental and physical integration. In China, the government actually supports in official for the development of qigong so that it is activated, practically suggested and progressed lively throughout the nation. Qigong in Korea is activated today. It will be expanded further from now on. Qigong is considered as a method of natural healing, physical theraphy and healthy longevity while giving attention to a lot of people in our country. As they demand qigong in daily lives, there increased the amount of service institute In our community. However, they are not qualified enough both of the knowledge and practical technique. In a future it may cause social problems and there need countermeasure. Therefore, the government must consider about certain problems such as Qigong clinics and its practicioners, which need to be examined before approval, and should enact the national policy and system so that Qigong in korea can be identifie as physical activity for all, as well as systematically established for a way of national health.

거푸집 개발용 GFRP보강 폴리머 복합패널의 휨 특성

연규석,권택정,정중호,김성기 강원대학교 부설 석재복합신소재 제품연구센터 2004 석재연 논문집 Vol.9 No.-

본 연구는 반영구수명의 교량상판용 영구거푸집을 개발할 목적으로 리브를 갖는 GFRP보강 폴리머 콘크리트 복합패널을 제작하고 이에 대한 휨특성을 고찰한 것이다. 연구에서 리브높이와 인장측 GFRP보강층 두께를 달리하는 12종류의 GFRP보강 폴리머 콘크리트 복합패널 시험체를 제작하고 이에 대한 휨시험을 수행함으로써 리브 높이와 GFRP보강층 두께가 복합패널의 휨특성에 미치는 영향을 실험적으로 구명하였다. 시험결과 GFRP보강 폴리머 콘크리트 복합패널의 극한 모멘트는 GFRP 보강두께가 증가 1.0에서 4.0 mm로 증가 할때, 리브 높이에 관계없이 약 93~101%의 거의 일정한 중가폭을 보였고, 리브 높이가 1.0에서 3.0cm로 증가할 때, GFRP 보강층 두께에 관계없이 약 35~41%의 거의 일정한 증가폭을 보였다. 또한 강도설계법에 기초한 극한모멘트 예측식은 실험결과와 잘 부합되어 리브를 갖는 GFRP 보강 폴리머 콘크리트 복합패널을 영구거푸집에 적용할 시 지간에 따른 상용 단면설계에 매우 유용하게 적용될 것이다. In this study, twelve different GFRP-reinforced polymer concrete composite panel specimens with various rib heights and tensile side and reinforced side thickness were produced. flexural tests were conducted to figure out the effect of the height and thickness influencing on the flexural properties of composite panel. Test results of the study are presented. Especially, a prediction equation of the ultimate moment based on the strength design method agrees well with the test results, and it is thought to be useful for the corresponding design of cross-section according to various spans as the GFRP-reinforced polymer concrete composite panel is applied for a permanent form.

유리섬유보강 폴리머 복합패널의 피로특성 : Fatigue Properties of Glass Fiber Reinforced Polymer Composite Panel

연규석,정중호,권택정,김성기 강원대학교 부설 석재복합신소재 제품연구센터 2004 석재연 논문집 Vol.9 No.-

본 연구는 압축강도 1,020 kgf/㎠를 갖는 폴리머 모르타르를 중심부로 하고 내·외표면은 고인장의 GF RP로 보강된 샌드위치 패널의 피로 특성에 관한 연구이다. 이를 위해 중심부 폴리머 모르타르와 압축 및 인장측 GERP보강층 두께를 달리하는 샌드위치 형식의 패널 시험체를 제작하고 이에 대한 휨 피로 시험을 수행함으로써 폴리머 모르타르 두께와 GFRP보강층 두께가 패널의 휨피로거동에 미치는 영향 즉 피로하중수준-피로수명과의 상관관계를 구명하였다. 실험결과 하중수준이 증가함에 폴리머 모르타르 및 GFRP 보강두께에 관계없이 샌드위치 패널의 피로수명은 감소하는 경향을 나타냈고, 동일 하중수준에서는 폴리머 모르타르 두께가 증가함에 따라 피로수명은 감소하는 경향을 나타냈으며, GFRP 보강층 두께가 증가함에 따라 피로수명이 증가하는 경향을 나타냈다. 한편 이러한 폴리머 모르타르 및 GFRP 보강층 두께에 따른 피로응력수준-피로수명 상관관계는 수정된 Miner의 법칙과 부합됨을 확인 할 수 있었다. Is this study, the fatigue properties of the sandwich panel of which core was made of the polymer mortar and inner and outer facings were reinforced by a high-tensile GFRP were surveyed. Sandwich-panel specimens consisted of polymer mortar core and GFRP compressive and tensile sides with various thickness were produced for the experimental study. Flexural fatigue tests were conducted to figure out the correlation between fatigue load and fatigue life for various thickness of core and facings, and its results are presented. The correlation obtained in this study between fatigue load and fatigue life for various thickness are in good agreement with the modified Miner's law.

DFT Studies on Two Novel Explosives Based on the Guanidine-Fused Bicyclic Structure

Jin, Xing-Hui,Hu, Bing-Cheng,Jia, Huan-Qing,Liu, Zu-Liang,Lu, Chun-Xu Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.4

Density functional theory (DFT) calculations at the B3LYP/6-31G(d,p) theoretical level were performed for two novel explosives (compounds B and C) based on the guanidine-fused bicyclic skeleton $C_4N_6H_8$ (A). The heats of formation (HOFs) were calculated via isodesmic reaction. The detonation properties were evaluated by using the Kamlet-Jacobs equations. The bond dissociation energies (BDEs) for the thermolysis initiation bond were also analyzed to investigate the thermal stability. The results show that the compounds have high positive HOF values (B, 1064.68 $kJ{\cdot}mol^{-1}$; C, 724.02 $kJ{\cdot}mol^{-1}$), high detonation properties (${\rho}$, D and P values of 2.04 $g{\cdot}cm^{-3}$ and 2.21 $g{\cdot}cm^{-3}$, 9.98 $km{\cdot}s^{-1}$ and 10.99 $km{\cdot}s^{-1}$, 46.44 GPa and 59.91 Gpa, respectively) and meet the basic stability requirement. Additionally, feasible synthetic routes of the these high energy density compounds (HEDCs) were also proposed via retrosynthetic analysis.

New Delay-range-dependent Exponential Estimates for Singular Systems with Time-varying Delay

Jin-Xing Lin,Xian-Lin Zhao,Shu-Min Fei 제어·로봇·시스템학회 2011 International Journal of Control, Automation, and Vol.9 No.2

This paper considers the problem of exponential stability for continuous-time singular systems with in-terval time-varying delay. By defining a novel Lyapunov-Krasovskii function and giving a tighter up-per bound of its derivative, a new delay-range-dependent exponential admissibility criterion, which not only guarantees the regularity, absence of impulses and exponential stability of the system but also gives the estimates of decay rate and decay coefficient, is established in terms of linear matrix inequality (LMI). The resulting criterion has advantages over the result previously reported by Haidar et al. [17] in that it involves fewer matrix variables but has less conservatism, which is established theoretically. Examples are provided to demonstrate the advantage of the proposed criterion.

2′-Methoxy-4′6′-Bis(Methoxymethoxy)Chalcone Inhibits Nitric Oxide Production in Lipopolysaccharide-Stimulated RAW 264.7 Macrophages

Jin, Xing Yu,Lee, Sung Hee,Park, Pil-Hoon,Hur, Jin,Kim, Soon-Ai,Kim, Hak Sung,Sohn, Dong Hwan Blackwell Publishing Ltd 2010 Basic & Clinical Pharmacology & Toxicology Vol.106 No.6

<P>Abstract: </P><P>Chalcones have anti-inflammatory properties. Here, we synthesized 2′-methoxy-4′6′-bis(methoxymethoxy)chalcone (MBMC) and examined its anti-inflammatory effects. MBMC inhibited nitric oxide production and inducible nitric oxide synthase (iNOS) expression in lipopolysaccharide (LPS)-stimulated RAW 264.7 murine macrophages. MBMC also blocked LPS-induced activation of nuclear factor &kgr;B (NF-&kgr;B), p38 mitogen-activated protein kinase and c-Jun N-terminal kinase (JNK). MBMC increased haem oxygenase 1 (HO-1) expression and nuclear accumulation of nuclear factor-erythroid 2-related factor 2 (Nrf2), an essential transcription factor for HO-1 induction. Treatment with tin protoporphyrin, a selective inhibitor of HO-1, reversed the inhibition of nitric oxide production by MBMC, suggesting that HO-1 induction mediates MBMC-mediated suppression of nitric oxide production. MBMC treatment rapidly and transiently decreased glutathione (GSH) levels, and treatment with GSH-Et (cell permeable form of GSH) or <I>N</I>-acetylcysteine (precursor of GSH) counteracted the HO-1 and Nrf2 expression elicited by MBMC, indicating that MBMC-induced HO-1 expression requires transient depletion of GSH. In summary, MBMC inhibits LPS-stimulated nitric oxide production via down-regulation of inflammatory pathways (NF-&kgr;B, p38 and JNK) and induction of the protective enzyme, HO-1.</P>

Structural Requirements of 2',4',6'-Tris(methoxymethoxy) chalcone Derivatives for Anti-inflammatory Activity: The Importance of a 2'-Hydroxy Moiety

Jin, Feng,Jin, Xing Yu,Jin, Ying Lan,Sohn, Dae-Won,Kim, Soon-Ai,Sohn, Dong-Hwan,Kim, Youn-Chul,Kim, Hak-Sung 대한약학회 2007 Archives of Pharmacal Research Vol.30 No.11

Butein, a natural chalcone, has anti-inflammatory and hepatoprotective activity. One synthetic derivative of butein, 2',4',6'-tris(methoxymethoxy)chalcone (TMMC), has potent anti-inflammatory activity via an HO-1 (heme oxygenase 1) dependent pathway. The ${\alpha},{\beta}-unsaturated$ ketone moiety in both TMMC and chalcones could be important in mediating this effect. To investigate the structural requirements of TMMC derivatives for anti-inflammatory effects, we modified the ${\alpha},{\beta}-unsaturated$ ketone moiety through catalytic hydrogenation, hydride reduction, or introduction of a triple bond. In addition, we performed structural modifications such as converting the -OMOM group to an -OMe or -OH group. Generally, modifications in the a,_-unsaturated ketone caused a significant decrease or loss of anti-inflammatory activity, which is consistent with the role of the a,_-unsaturated ketone group acting as a Michael acceptor of nucleophilic species like glutathione or cysteine residues on proteins. Chemically, the electron-donating substituents could make the thiol-adduct more stable by decreasing the acidity of the ${\alpha}-hydrogen$ and slowing the speed of the retro-Michael reaction. Also, like previous studies, the 2'-hydroxy group was crucial in increasing the anti-inflammatory effect. The 2'-hydroxy group produced potent anti-inflammatory effects by increasing the electrophilic properties of ${\alpha},{\beta}-unsaturated$ ketones due to hydrogen bonding between the 2'-hydroxy group and the ketone moiety.

CLASSICAL ELECTROMAGNETICALLY-INDUCED TRANSPARENCY-LIKE SWITCHING CONTROLLED BY POLARIZATION IN METAMATERIALS

JIN, XING RI,PARK, JINWOO,ZHENG, HAIYU,LEE, YOUNGPAK,RHEE, JOO YULL,KIM, KI WON,JANG, WON HO World Scientific 2013 Journal of Nonlinear Optical Physics and Materials Vol.22 No.1

Manipulation of electromagnetically-induced transparency in planar metamaterials based on phase coupling

Jin, Xing-Ri,Lu, Yuehui,Park, Jinwoo,Zheng, Haiyu,Gao, Feng,Lee, YoungPak,Yull Rhee, Joo,Won Kim, Ki,Cheong, H.,Jang, Won Ho American Institute of Physics 2012 JOURNAL OF APPLIED PHYSICS - Vol.111 No.7

Low Complexity Discrete Hartley Transform Precoded OFDM System over Frequency-Selective Fading Channel

Xing Ouyang,Jiyu Jin,Guiyue Jin,Peng Li 한국전자통신연구원 2015 ETRI Journal Vol.37 No.1

Orthogonal frequency-division multiplexing (OFDM) suffers from spectral nulls of frequency-selective fading channels. Linear precoded (LP-) OFDM is an effective method that guarantees symbol detectability by spreading the frequency-domain symbols over the whole spectrum. This paper proposes a computationally efficient and low-cost implementation for discrete Hartley transform (DHT) precoded OFDM systems. Compared to conventional DHT-OFDM systems, at the transmitter, both the DHT and the inverse discrete Fourier transform are replaced by a one-level butterfly structure that involves only one addition per symbol to generate the time-domain DHT-OFDM signal. At the receiver, only the DHT is required to recover the distorted signal with a single-tap equalizer in contrast to both the DHT and the DFT in the conventional DHT-OFDM. Theoretical analysis of DHT-OFDM with linear equalizers is presented and confirmed by numerical simulation. It is shown that the proposed DHT-OFDM system achieves similar performance when compared to other LP-OFDMs but exhibits a lower implementation complexity and peak-to-average power ratio.