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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.
GG-38 : 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.
Interference Levels Between Closely Spaced Dual Polarized Geostationary-Satellite Networks
Won Jun Choi,Jong Won Eun 한국정보통신학회 2019 2016 INTERNATIONAL CONFERENCE Vol.11 No.1
The interference between closely spaced co-frequency and co-coverage adjacent satellite networks was analyzed when these networks use different types of polarization and simultaneously both orthogonal polarizations. The interference levels were compared with those that exist when the satellite networks use the same type of polarization. A simple equation was also derived to calculate the interference levels. The results of simulation show that the interference mainly depends on the earth station antenna off-axis co-polar and cross-polar patterns.
Choi, Jun-Kyun,Kim, Soo-Hyung,Kim, Nam,Sohn, Sung-Won,Choi, Mun-Kee Electronics and Telecommunications Research Instit 1999 ETRI Journal Vol.21 No.4
In this paper, we analyze the performance benefits of broadband ATM networks when the call control and management flows are separated from user data flows. The virtual path tunneling concept for control and management flows are applied to the same physical ATM networks. The behaviors of channel throughput and transfer delay are analyzed. It results that the proposed virtual short-cut paths can maintain the network being stable with acceptable bandwidth. They are very useful to provide the stable control and management capabilities for Internet and mobile applications in the broadband ATM networks. In our numerical results, the effective throughputs of the proposed virtual shout-ut channel are about three times than those of end-to-end user data channels with hop distances of 10, and about two times than those with hop distance of 5 when the link blocking probability increases to 0.1. It concludes that the effective channel bandwidth are greatly reduced down while physical links are not stable and user traffic flows are occasionally overflowed.
( Won Ho Choi ),( Jae Hwan Shin ),( Tae Hoon Song ),( Won Jun Lee ),( Chun Gon Kim ) 한국복합재료학회 2014 Composites research Vol.27 No.6
In this study, a novel microwave absorber which consists of a structural part, a resistive sheet, and a lowdielectric layer is proposed. Unlike the conventional Salisbury screen, a newly proposed absorber is capable of a rangeof absorbing performance, from narrowband to broadband. In the case of the narrowband absorber, the fabricatedabsorber with optimized design parameters has a strong resonance at 9.25 GHz and reflection loss of .44 dB withsatisfying the .10 dB absorption in whole X-band (8.2 GHz~12.4 GHz). For the broadband absorber design, thereflectivity was minimized in the considered frequency ranges. The designed absorber showed two weak resonancesnear 6.5 GHz and 16.5 GHz and satisfied the .10 dB absorption from C-band to Ku-band (4 GHz~18 GHz). Themeasured reflection loss of fabricated absorber was well matched with simulation results, though the measurement wasonly performed on X-band. For the Salisbury screen to be capable of broadband absorption, it should be stackedmultiply in a structure known as the Jaumann absorber. However, for the microwave absorber presented here,broadband as well as narrowband capabilities can be implemented without a change of the structure.