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대학태권도선수의 실수인식과 의도적 연습 및 인지된 경기력의 관계
최봉준(Choi, Bong Jun),원세종(Won, Se-Jong) 세계태권도문화학회 2022 세계태권도문화학회지 Vol.13 No.2
The purpose of this study was to investigate the relationship of perception of error, deliberate practice, and perceived performance of University Taekwondo Athletes. To this end, 321 Taekwondo athletes (male 207, female 114) participated in this study. Collected data were analyzed by descriptive statistics, correlation, and multiple regression using SPSS 22.0 version. The results revealed as follow. First, learning from error, error risk taking, and thinking about error had a positive effect on deliberate practice. Second, learning from error and thinking about error had a positive effect on performance satisfaction while error risk taking and thinking about error had a positive effect on will to win. Third, deliberate practice had a positive effect on performance satisfaction and will to win. In conclusion, athletes’ perception of error is key component to enhance deliberate practice and perceived performance. Furthermore, deliberate practice was also identified as a variable that improves perceived performance.
Minimal invasive surgery (LESS) for huge cystic adnexal tumors in whole abdomen
( In Young Choi ),( Ji Hye Lee ),( Mi Hyun Park ),( Ji Kwoun Park ),( Jeong Kyu Shin1 ),( Won Jun Choi1 ),( Soon Ae Lee ),( Jong Hak Lee ),( Won Young Paik ) 대한산부인과학회 2014 대한산부인과학회 학술대회 Vol.100 No.-
Laparoendoscopic single-site surgery (LESS) is helpful if not an evidence of suspicious malignancy in huge adnexa tumors. This approach might be reasonable alternative to conventional laparoscopic surgery. We report two cases with LESS for huge cystic adnexal tumors in whole abdomen. A 58 years old multigravida woman in menopause underwent removal of a huge cystic adnexal mass that occupied her entire abdomen by LESS.(ca.5200ml aspiration) A 15 years old single nulligravida woman had a huge cystic adnexal tumor in whole abdomen reaching to the level of the xyphoid process. A needle through the transumbilical single port was inserted directly under the mass. Subsequently, 8000 ml of cystic fluid was aspirated without spillage.
정응기,이기환,원용재,박향미,전남수,최준호,구연충,한창덕,은무영,김태산,남민희,Jeong Eung-Gi,Yi Gi-Hwan,Won Yong-Jea,Park Hyang-Mi,Cheon Nam-Soo,Choi Jun-Ho,Ku Yeon-Chung,Han Chang-Deok,Eun Mu-Yeong,Kim Tae-Sas,Nam Min-Hee 한국식물생명공학회 2005 식물생명공학회지 Vol.32 No.2
밀양 204호는 작물과학원 영남농업연구소 생명공학연구팀이 직파적응 제초제저항성 벼 품종을 육성할 목적으로 '98년 bar 유전자를 동진벼에 아그로박테리움법으로 형질 전환하여 제초제저항성 벼를 양성하였다. '98/'99년 동계에 단간 내도복 양질인 주남벼를 인공교배하여 약배양 등 육종프로그램에 적용하여 우량계통을 선발하고 밀양 204호로 계통명을 부여하였다. GM 벼와 Non-GM 벼의 농업적 특성을 UPOV 및 국립종자관리소의 품종등록 기준에 따른 농업적특성 중 차이가 있었던 것은 엽색도, 지엽의 형태, 간장, 수당립수 등 이었다. This study was conducted to investigated the major characteristics of genetically modified rice of 'Milyang 204' originated from Dongjinbyeo compared to a non-transgenic rice varieties Dongjinbyeo and Jun-ambyeo. Basta resistant transgenic rice lines carrying bar gene produced by the Yeongnam Agricultural Research Institute were evaluated for their agronomic characters. The transgenic Japonica rice of 'Milyang 204' showed inferior phenotypic traits compared to a non-transgenic rice variety Dongjinbyeo and Junambyeo. On the basis of UPOV (Union Internationale Pour la Protaection des Obtentions Vegetables) and NSMO(National Seed Management Office) the transgenic 'Milyang 204' showed difference in some traits out of some agronomic traits, such as leaf color, angle of flag leaf, number of spikelets, culm length, white core and white belly compared to the non-transgenic varieties rice.
Case Studies on Cultural Differences in TV Advertising: Focus on South Korea and USA
Won-jun Choi,Kyung Mi Bae 인문사회과학기술융합학회 2018 예술인문사회융합멀티미디어논문지 Vol.8 No.11
This study focuses on cultural differences between South Korea and United States in TV advertising by analyzing eight different cases. Cultural differences, while difficult to observe and measure; are very significant that a business can not merely rely on current method of conducting business, when the corporation decides to jump into international level in such competitive world. Despite cultural aspects are vital to grasp, little research has been proceeded, thus this study serves the purpose of utilizing the Hofstede’s cultural dimensions to compare the cultural values of South Korea and the United States to observe the impact of cultural factors regarding commercials. In this study, TV commercials of Hyundai Motors, Samsung Mobile, and Absolute and Soju as cases of liquors are used for comparison between two countries and the commercials of Emart’s world beer and Christian Dior’s Miss Dior are analyzed to reflect the current cultural similarities. Thus, corporation ought to exercise cultural insights to ensure that the developed marketing tactics would generate the necessary reactions required to propel the corporation’s image forward.
Electrical detection of coherent spin precession using the ballistic intrinsic spin Hall effect
Choi, Won Young,Kim, Hyung-jun,Chang, Joonyeon,Han, Suk Hee,Koo, Hyun Cheol,Johnson, Mark Nature Publishing Group 2015 Nature nanotechnology Vol.10 No.8
The spin–orbit interaction in two-dimensional electron systems provides an exceptionally rich area of research. Coherent spin precession in a Rashba effective magnetic field in the channel of a spin field-effect transistor and the spin Hall effect are the two most compelling topics in this area. Here, we combine these effects to provide a direct demonstration of the ballistic intrinsic spin Hall effect and to demonstrate a technique for an all-electric measurement of the Datta–Das conductance oscillation, that is, the oscillation in the source–drain conductance due to spin precession. Our hybrid device has a ferromagnet electrode as a spin injector and a spin Hall detector. Results from multiple devices with different channel lengths map out two full wavelengths of the Datta–Das oscillation. We also use the original Datta–Das technique with a single device of fixed length and measure the channel conductance as the gate voltage is varied. Our experiments show that the ballistic spin Hall effect can be used for efficient injection or detection of spin polarized electrons, thereby enabling the development of an integrated spin transistor.
Detection of Large-Scale Wireless Systems via Sparse Error Recovery
Jun Won Choi,Byonghyo Shim Institute of Electrical and Electronics Engineers 2017 IEEE transactions on signal processing Vol.65 No.22
<P>In this paper, we propose a new detection algorithm for large-scale wireless systems, referred to as post sparse error detection (PSED) algorithm, that employs a sparse error recovery algorithm to refine the estimate of a symbol vector obtained by the conventional linear detector. The PSED algorithm operates in two steps: First, sparse transformation converting the original nonsparse system into the sparse system whose input is an error vector caused by the symbol slicing; and second, the estimation of the error vector using the sparse recovery algorithm. From the asymptotic mean square error analysis and empirical simulations performed on large-scale wireless systems, we show that the PSED algorithm brings significant performance gain over classical linear detectors while imposing relatively small computational overhead.</P>
Choi, Seok,Cho, Kyung-Won,Reu, Jong-Hyun,Kim, Jun-Soo,Mun, Hyun-Sik,Kim, Myung-Young,Park, Kwang-Chul,Heo, Gwang-Sik,Chang, Sung-Jong,Yeum, Cheol-Ho,Yoon, Pyung-Jin,Jun, Jae-Yeoul The Korean Society of Pharmacology 2004 The Korean Journal of Physiology & Pharmacology Vol.8 No.3
The interstitial cells of Cajal (ICCs) are the pacemaker cells in gastrointestinal tract and generate electrical rhythmicity in gastrointestinal muscles. Therefore, ICC may be modulated by endogenous agents such as neurotransmitter, hormones, and prostaglandins (PGs). In the present study, we investigated the effects of prostaglandins, especially $PGE_2$, on pacemaker currents in cultured ICCs from murine small intestine by using whole-cell patch clamp techniques. ICCs generated spontaneous slow waves under voltage-clamp conditions and showed a mean amplitude of $-452{\pm}39\;pA$ and frequency of $18{\pm}2$ cycles/min (n=6). Treatments of the cells with $PGE_2$ $(1\;{\mu}M)$ decreased both the frequency and amplitude of the pacemaker currents and increased the resting currents in the outward direction. $PGE_2$ had only inhibitory effects on pacemaker currents and this inhibitory effect was dose-dependent. For characterization of specific membrane EP receptor subtypes, involved in the effects of $PGE_2$ on pacemaker currents in ICCs, EP receptor agonists were used: Butaprost $(1\;{\mu}M)$, $EP_2$ receptor agonist, reduced the spontaneous inward current frequency and amplitude in cultured ICCs (n=5). However sulprostone $(1\;{\mu}M)$, a mixed $EP_1$ and $EP_3$ agonist, had no effects on the frequency, amplitude and resting currents of pacemaker currents (n=5). SQ-22536 (an inhibitor of adenylate cyclase; $100\;{\mu}M$) and ODQ (an inhibitor of guanylate cyclase; $100\;{\mu}M$) had no effects on $PGE_2$ actions of pacemaker currents. These observations indicate that $PGE_2$ alter directly the pacemaker currents in ICCs, and that the $PGE_2$ receptor subtypes involved are the $EP_2$ receptor, independent of cyclic AMP- and GMP-dependent pathway.
Three-dimensionally stacked Al<sub>2</sub>O<sub>3</sub>/graphene oxide for gas barrier applications
Choi, Dong-won,Park, Hun,Lim, Jun Hyung,Han, Tae Hee,Park, Jin-Seong Elsevier 2017 Carbon Vol.125 No.-
<P>We investigated the growth behavior of Al2O3 using atomic layer deposition (ALD) on the surface of chemical vapor deposition (CVD)-grown graphene and graphene oxide (GO). While selective ALD growth was observed on CVD-grown graphene along defective sites, smooth and continuous films were grown on GO without selective growth. Linear growth of Al2O3 on GO was observed without a nucleation region or growth selectivity. This result indicates that the ALD film growth is more suitable for GO because of the abundant and homogeneously distributed reactive sites over its basal plane. By taking advantage of GO as an ideal substrate for the ALD growth of metal oxides, highly aligned, multiple-stacked, three-dimensional Al2O3/GO structures were fabricated, which showed much better effective gas barrier characteristics (1.73 x 10(-4) g/m(2) day) than that exhibited by pristine single Al2O3 thin films of the same thickness. (C) 2017 Elsevier Ltd. All rights reserved.</P>