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곽은창(Gwag Eun Chang),곽노철(Gwag No Cheol) 한국사회체육학회 2003 한국사회체육학회지 Vol.20 No.1
The purpose of this study was to investigate the cultural context of caddies who work at five different golf country clubs in Kyunggi and Kangwon province. The final questionnaire designed by investigators were distributed to the caddies in five country clubs. Two hundred ninety four caddies showed willingness to participate for the study. Among 294, 189 questionnaire were available for the data analysis. The most significant fact in this study was most caddies strongly want to be treated as a normal person not a slave or servant by golfers. Human right seems to be non-existed in golf courses. The results of the study shows that their working value should be upgraded and pay more than current caddy fee. They also indicated that their salary is not high enough. Caddies` leisure activity type is very limited such as movie/videotape, television, reading, and so on. Environmental problems were concern of caddies but not seriously. Total income of caddie is not as high as they expected and valued. However, this matter includes a big difference between caddie and golfer who employed caddie temporarily during the rounding. It seems to call more study on this issue. Further in-depth investigation should be conducted to find the various effects on each variable which constitutes the distinctive golf culture in caddie`s world.
Characterization of new microsatellite markers in mung bean, <i>Vigna radiata</i> (L.)
GWAG, JAE-GYUN,CHUNG, JONG-WOOK,CHUNG, HUN-KI,LEE, JEONG-HEUI,MA, KYUNG-HO,DIXIT, ANUPAM,PARK, YONG-JIN,CHO, EUN-GI,KIM, TAE-SAN,LEE, SUK-HA BLACKWELL 2006 MOLECULAR ECOLOGY NOTES Vol.6 No.4
<P>Abstract</P><P>The present work reports the isolation and characterization of new polymorphic microsatellites in mung bean (<I>Vigna radiata</I> L.). Of 93 designed primer pairs, seven were found to amplify polymorphic microsatellite loci, which were then characterized using 34 mung bean accessions. The number of alleles ranged from two to five alleles per locus with an average of three alleles. Observed and expected heterozygosity values ranged from 0 to 0.088 and from 0.275 to 0.683, respectively. All seven loci showed significant deviations from Hardy–Weinberg equilibrium, whereas only one pairwise combination (GBssr-MB77 and GBssr-MB91) exhibited significant departure from linkage disequilibrium. These newly developed markers are currently being utilized for diversity assessment within the mung bean germplasm collection of the Korean Gene Bank.</P>
Neurotrophin-induced ROS production and neuronal death
Gwag, Byoung Joo 이화여자대학교 세포신호전달연구센터 2004 고사리 세포신호전달 심포지움 Vol. No.6
The neurotrophins, a class of nerve growth factor-related growth factors, promote the differentiation, growth, and survival of neurons by binding to Trk receptor tyrosine kinases and p75(NTR). Once synthesized in target cells, neurotrophins are released, bound to the cell surface receptors, and internalized to promote neuronal survival by interfering with programmed cell death or apoptosis. In addition to neuroprotective potential of neurotrophins, neurotrophins potentiate neuronal injury under various pathological conditions. Moreover, evidence has accumulated showing that neurotrophins can induce neuronal death. While cellular and molecular mechanisms underlying anti-apoptosis action of neurotrophins have been well documented, mechanisms for pro-necrosis effects of neurotrophins remain to be unveiled. Here, we delineated the patterns and underlying mechanisms of neuronal death induced by neurotrophins.
LCD with Tunable Viewing Angle by Thermal Modulation of Optical Layer
Gwag, Jin-Seog,Lee, You-Jin,Han, In-Young,Yu, Chang-Jae,Kim, Jae-Hoon The Korean Infomation Display Society 2009 Journal of information display Vol.10 No.1
In this paper, we review the proposed liquid crystal display (LCD) with a tunable viewing angle consisting of a conventional liquid crystal display (LCD) panel and a thermally variable retardation layer (TVRL) characterized by uniformly aligned LC film with transparent indium-tin-oxide electrodes for Joule heating. In the TVRL, nematic phase is transitioned into isotropic by Joule heating. The numerical calculation showed that the intrinsic wide viewing angle was achieved at the isotropic phase of the TVRL by Joule heating, whereas the narrow viewing angle was obtained at the nematic phase of the TVRL. The simulated and experimental results of the proposed LCD show continuous and symmetrical viewing angle characteristics by tuning the retardation of TVRL using Joule heating. The structure of the viewing angle control proposed here is adoptable to all LCD modes with wide viewing angle characteristics.
Gwag, Jin Seog,Kim, Jae Chang,Yoon, Tae-Hoon Wiley Subscription Services, Inc., A Wiley Company 2006 Journal of applied polymer science Vol.102 No.2
<P>The property of the unidirectional out-of-plane tilt angle in a nematic liquid crystal is investigated in view of van-der-Waals interaction between nematic liquid crystal molecules and three layers: the anisotropic polyimide layer, the isotropic polyimide layer, and the substrate layer. Dependence of the pretilt angle on the total thickness of the polyimide layer and the thickness of the anisotropic layer oriented by rubbing is estimated from experiment and theory. Our results show that the screening factor increases with the increase of the thickness of the isotropic layer. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 1505–1508, 2006</P>
A functionally separated nanoimprinting material tailored for homeotropic liquid crystal alignment
Gwag, Jin Seog,Oh-e, Masahito,Kim, Kwang-Ryul,Cho, Sung-Hak,Yoneya, Makoto,Yokoyama, Hiroshi,Satou, Hiroyuki,Itami, Setsuo IOP Pub 2008 Nanotechnology Vol.19 No.39
<P>In order to homeotropically align liquid crystals (LCs) at the nanosized surface grooves processed by nanoimprint lithography technology (NIL), we propose to design a hybrid-type homeotropic polymer material consisting of two distinct moieties with largely different thermo-mechanical properties and surface activity. Surface contact angle measurements and sum-frequency vibrational spectroscopy allow us to conclude that the polymer film is a functionally separated composite suitable for the homeotropic LC alignment processed by NIL. As one of the potential applications using the hybrid-type homeotropic polymer, we demonstrate that the nanoimprinted grooves at the polymer surface can achieve a zenithal nematic LC bistability. </P>