Growth Characteristics of Dendropanax morbifera in Chonnam

Choi,Seong-Kyu,Yun,Kyeong-Won,Lee,Jong-Il 한국자원식물학회 2002 Plant Resources Vol.5 No.2

This study was carried out obtain basic information for growth characteristics by different age of Dendropanax morbifera in chonnam, such as Yosu, Sunchon, Haenam, Gangjin, Wando. The pH of soil in cultivation area was 5.2 to 5.6 and organic matter was very high up to 10.6% . P205 content of soil in cultivation area was 35.3 to 42.1 mg/L, C.E.S was 13.9 to 14.4 me/100g, and moisture rate was 19.2 to 21.1 % . The flowering of Dendropanax morbifera began from 6~7 years old tree. The flowering date was at 10th of July at Wando. The growth characteristics of 12 years old tree was 929.5cm in stem height, 134.1mm in stem diameter, and 15 years old tree was 1,117.9cm in stem height, 160.8mm in stem diameter. The number of leaf was 13.9 at five years old tree, and the petioles length was 12.6 at five years old tree. Xylem sap can be had at more than 10 years old tree with good growth more than 10 em stem diameter.

A Basic Study on Leaf and Stem Production of Angelica acutiloba

Choi,Seong-Kyu,Yun,Kyeong-won,Chon,Sang-Uk,Lee,Jong-Ill,Seo,Young-Nam,Seo,Kyoung-Sun,Choi,Kyeong-Ju 한국자원식물학회 2004 Plant Resources Vol.7 No.3

This study was conducted to develop effective production system in greenhouse for leaves and stems of Angelica acutiloba by using connect pots in 2003 and 2004. Seed germination rate and plant biomass of Angelica acutiloba collected in 2004 were higher than those harvested in 2003. Germination rate of Angelica acutiloba seeds collected in 2003 was 10%, while germination rate of seeds collected in 2004 was above 90%. Especially, plant growth and yield of Angelica acutiloba grown in connect pots sized with 4×4×5cm(length×width×height) were the highest. These results indicate that leaf and stem production of Angelica acutiloba can be improved by using connect pots and optimizing seed collecting time in greenhouse.

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.

데이터 마이닝을 활용한 한국 프로야구 구단의 승패예측과 승률 향상을 위한 전략 도출 연구

김원종 ( Kim Won-jong ),최연식 ( Choi Yeon-sik ),유동희 ( Yoo Dong-hee ) 한국스포츠산업경영학회 2018 한국스포츠산업경영학회지 Vol.23 No.3

본 연구에서는 데이터 마이닝 기법을 활용하여 한국 프로야구의 승패예측모형을 구축하는 실험을 진행하였다. 이를 위해, 2017년에 실시된 한국 프로야구 10개 구단의 전체 경기 중 무승부 경기를 제외한 1,418경기에 대한 자료를 사용하였다. 승패예측모형에는 의사결정나무, 베이즈넷, 인공신경망 알고리즘과 앙상블 기법인 배깅과 부스팅이 사용되었으며, 그 결과 배깅 기법에 인공신경망을 적용한 예측모형에서 가장 높은 예측률인 85.18%를 기록하였다. 다음으로 의사결정나무 기반 예측모형을 활용하여 한국 프로야구 전체 구단에 관한 8개의 승패규칙을 도출하였다. 여기에서 승패규칙은 승패예측에 영향을 미치는 주요 요인들인 팀출루율, 팀타율, 피안타, 안타, 타석, 타수로 표현되며, 도출된 규칙을 바탕으로 구단의 승률 향상에 도움을 주는 전략을 제안하였다. 또한 플레이오프 진출 구단과 미진출 구단에 관한 승리규칙을 각각 4개씩 도출하였고 이를 바탕으로 두 집단에 맞춤화된 승률 향상 전략을 제시하였으며, 실제 구단에서 선수를 영입한 방향과의 비교를 통해 제시된 전략의 활용 가능성을 확인하였다. This study conducted an experiment to develop win-loss prediction models for the Korean professional baseball league using data mining techniques. To this end, we used data on 1,418 games from all games played by the ten Korean professional baseball teams in 2017, except draw games. We developed win-loss prediction models using not only a decision tree, Bayse net, and artificial neural network algorithms, but also ensemble methods, such as bagging and boosting. As a result, first, we found that the artificial neural network-based prediction model using the bagging method reported the best accuracy (85.18%). Second, we derived eight win-loss rules for entire teams from the decision tree-based prediction model. These rules consist of six influential factors: team on base average, team batting average, hit by opponent, hit, plate appearances, and at bat. Using the derived rules, we proposed helpful strategies for improving the winning rate. Third, we derived four winning rules for both playoff teams and non-playoff teams; using the rules we proposed customized strategies for improving the winning rate of the two different groups. Finally, we confirmed the feasibility of the proposed strategies by comparing non-playoff teams’ actual player recruitment strategies.

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.

Damage Detection Method for Large Structures Using Static and Dynamic Strain Data from Distributed Fiber Optic Sensor

( Jong Won Lee ),( Kwang Ho Choi ),( Young Cheol Huh ) 한국강구조학회 2010 International Journal of Steel Structures Vol.10 No.1

A method for damage detection applicable to large slender steel structures such as towers of large-scale wind turbines, longspan bridges, and high-rise buildings is presented. This method is based on continuous strain data obtained by distributed fiber optic sensor (FOS) and neural network (NN) analysis. An analytical model for cracked beam based on an energy balance approach was used to train a NN. The continuous static strains and the natural frequencies obtained from the distributed FOSs were used as the input to the trained NN to estimate the crack depths and locations. An experimental study was carried out on a cracked cantilever beam to verify the present method for damage identification. The cracks were inflicted on the beam, and static and free vibration tests were performed for the intact case and the damage cases. The distributed FOSs were used to measure the continuous strains. The damage estimation was carried out for the 5 damage cases using the NN technique. It has been found that the identified crack depths and locations agree reasonably well with the inflicted cracks on the structure.

Frame Rate Up Conversion Based on Variational Image Fusion

Won Hee Lee,Kyuha Choi,Jong Beom Ra IEEE 2014 IEEE TRANSACTIONS ON IMAGE PROCESSING - Vol.23 No.1

<P>This paper presents a new framework for motion compensated frame rate up conversion (FRUC) based on variational image fusion. The proposed algorithm consists of two steps: 1) generation of multiple intermediate interpolated frames and 2) fusion of those intermediate frames. In the first step, we determine four different sets of the motion vector field using four neighboring frames. We then generate intermediate interpolated frames corresponding to the determined four sets of the motion vector field, respectively. Multiple sets of the motion vector field are used to solve the occlusion problem in motion estimation. In the second step, the four intermediate interpolated frames are fused into a single frame via a variational image fusion process. For effective fusion, we determine fusion weights for each intermediate interpolated frame by minimizing the energy, which consists of a weighted- L1-norm based data energy and gradient-driven smoothness energy. Experimental results demonstrate that the proposed algorithm improves the performance of FRUC compared with the existing algorithms.</P>

Considerations for the design of in-use stability studies of nonsterile pharmaceutical dosage forms: a literature review

Choi Miseop,진민기,김하은,정민우,Yoo Hyelim,Won Jong-Hee,조정원 한국약제학회 2022 Journal of Pharmaceutical Investigation Vol.52 No.5

Background For multidose drug products where quality degradation is a concern, evidence of in-use stability should be specified when applying for marketing authorization. However, currently, there are no specific guidelines for reference concerning in-use stability testing. The purpose of this review was to identify trends in the study of in-use stability of nonsterile dosage forms and to present specific considerations necessary for conducting in-use stability tests. Area covered In this paper, in-use stability studies of nonaqueous and water-containing, nonsterile pharmaceutical dosage forms are reviewed. A total of 19 articles met the exclusion and inclusion criteria; 9 articles for nonaqueous formulations and 13 articles for water-containing formulations were identified depending on whether the formulation contained moisture. In the case of active substances, articles involving 21 active substances were identified. Expert opinion As a result of the study, we summarized in-use stability study designs and in-use shelf life settings for nonsterile formulations such as formulation (strength), container closure system, storage conditions, testing intervals, withdrawal methods, test measurements, and test results. Based on the review, specific considerations including those for drug characterization, storage conditions and test period, testing intervals, and in-use simulation design (withdrawal method) and test methods are presented in relation to the study of in-use stability of nonsterile dosage forms for reference by the pharmaceutical industry.

Effect on of bovine growth hormone and some bioadditions on the growth of colored carp

Jong Bong Kim,Jang Won Choi 한국생명과학회 2004 한국생명과학회 심포지움 Vol.41 No.-

The Potency of Abamectin Formulations against the Pine Wood Nematode, Bursaphelenchus xylophilus

Jong-won Lee(Jong-won Lee),Abraham Okki Mwamula(Abraham Okki Mwamula ),Jae-hyuk Choi(Jae-hyuk Choi),Ho-wook Lee(Ho-wook Lee),Yi Seul Kim(Yi Seul Kim),Jin-Hyo Kim(Jin-Hyo Kim),Dong Woon Lee(Dong Woon L 한국식물병리학회 2023 Plant Pathology Journal Vol.39 No.3

Abamectin offers great protection against Bursaphelenchus xylophilus, a well-known devastating pathogen of pine tree stands. Trunk injection of nematicides is currently the most preferred method of control. This study aimed to evaluate the potency of the commonly used formulations of abamectin against B. xylophilus. Twenty-one formulations of abamectin were evaluated by comparing their sublethal toxicities and reproduction inhibition potentials against B. xylophilus. Nematodes were treated with diluted formulation concentrations in multi-well culture plates. And, populations pre-exposed to pre-determined concentrations of the formulations were inoculated onto Botrytis cinerea culture, and in pine twig cuttings. Potency was contrastingly different among formulations, with LC95 of 0.00285 and 0.39462 mg/ml for the most, and the least potent formulation, respectively. Paralysis generally occurred at an application dose of 0.06 μg/ ml or higher, and formulations with high sublethal toxicities caused significant paralysis levels at the tested doses, albeit the variations. Nematode reproduction was evident at lower doses of 0.00053-0.0006 μg/ml both on Botrytis cinerea and pine twigs, with significant variations among formulations. Thus, the study highlighted the inconsistencies in the potency of similar product formulations with the same active ingredient concentration against the target organism, and the need to analyze the potential antagonistic effects of the addi-tives used in formulations.