Static Output Feedback Model Predictive Control for Wiener Models with Polytopic Uncertainty Descriptions

Sunjang Kim,Sangmoon Lee,Sangun Kim,Sangchul Won 제어로봇시스템학회 2003 제어로봇시스템학회 국제학술대회 논문집 Vol.2003 No.10

The Effect of Sports Motivation of Middle School SOCCER Players on the Sports Goal Orientation

Sunjang Lee,Jongsoo Kim,Jusik Park J-INSTITUTE 2020 Kinesiology Vol.5 No.2

Purpose: The study was conducted to verify how sports motivations affect sports goal orientations for mid-dle school soccer players. In order to achieve the goal of this study, a survey was conducted on 338 middle school soccer players to analyze the collected data. The conclusions of the analysis are as follows. Method: In this study, the data collected through the questionnaire was analyzed using SPSS 26.0. Frequen-cy analysis was conducted to identify the demographic and statistical characteristics of the study participants, and the reliability coefficient(Cronbach α) was calculated to determine the stability, consistency, and predicta-bility of the measurement tools for each item. One-way ANOVA was conducted to find out how the demograph-ic variables of middle school soccer players differed in sports motivation and sports goal orientation. In addition, multiple regression analysis was conducted to verify how sports motivations of middle school soccer players affect their sports goal orientations. The significance level of all the statistics was set at .05. Result: First, the analysis of the differences in sports motivation according to the school year of middle school soccer players showed statistically significant differences in self-control and amotivation factors. Second, an analysis of the differences in sports motivation according to the athletic career of middle school soccer players showed statistically significant differences in intrinsic and extrinsic motivation and amotivation factors. Third, an analysis of the effect of middle school soccer players sports motivation on sports goal orien-tation showed that self-control was a factor in task orientation and that there were statistically significant dif-ferences in intrinsic and extrinsic motivations on the ego orientation. Suggestions: Suggestions for future studies based on the results of this study include the following. This study was conducted only for middle school students, so subsequent studies would be meaningful if they were conducted on high school and college students as well. And a study on the differences between teenagers, col-lege students, and regular soccer players will also be meaningful. It would also be meaningful if there were studies that identified not only sports motivation and sports goal orientation but also relationships with various variables and qualitative studies that could find in-depth causes.

A Study on the Verification of Competency Management Factors of College TAEKWONDO Athletes and Strategies for Improving Performance

Sunjang Lee,Jusik Park,Jongsoo Kim J-INSTITUTE 2021 International Journal of Martial Arts Vol.6 No.3

Purpose: The purpose of this study is, as a previous study to help prepare specific goals and plans for the uni-versity students of Taekwondo major, is to identify and analyze the major areas of interest and their extent of interest for the underclassmen university students in Taekwondo major. Method: To examine and understand the area of interest and the extent of interest of the university students of Taekwondo major, this study produced and conducted an open-ended survey questionnaire regarding religion, hobbies, Taekwondo major’s area of interest, and future hopes. As for the data collected based on the question-naires, the SPSS 26.0 program was used. The frequency analysis was performed to analyze the general character-istics of the study participants and the extent of interest of their area of interest, and the data collected via the open-ended questionnaire were subjected to the inductive content analysis. Results: First, as a result of the inductive content analysis performed of the extent of interest for the hobby ac-tivities of the university students of Taekwondo major, the hobby activities were structured into 18 sub-areas, and the 18 sub-areas were further classified into the 5 general areas of physical activity(206), media activity(54), so-cial group activity(37), literary activity(26), and others(6), respectively. In the general area, physical activi-ty(62.61%) turned out to have the largest rate, followed by media activity(16.41%), social group activity(11.25%), and liter-ary activity(7.9%), in terms of the extent of interest hobbies, respectively. Second, the first year and sec-ond year university students of Taekwondo major who analyzed the Taekwondo major’s area of interest for the extent of interest of the university students of Taekwondo major turned out to have demonstration being the largest with 42 people(45.3%) among the 3 areas of Taekwondo of Poomsae, Sparring, and Demonstration, with 35 people(36.8%) for Poomsae, and 17 people(17.9%) for Sparring. Conclusion: If the areas of interests of the underclassmen university students identified based on the results of this study were utilized as the basic data, it will be possible for the university students to present specific goals for their future career paths and occupations after graduation through their upperclassmen years.

Differences in PROTECTION for Sports Im-agery Ability of High School Taekwondo Breaking Athletes

Jongsoo Kim,Sunjang Lee,Jusik Park J-INSTITUTE 2020 Protection Convergence Vol.5 No.2

Purpose: The study was conducted to verify the differences in sports imagery ability among high school students/taekwondo breading athletes participating in taekwondo breaking competitions across the country. In order to achieve the purpose of this research, 230 high school students/taekwondo breaking athletes who had participated in national-level taekwondo breaking competitions were surveyed and the collected data were an-alyzed. The conclusions of the analysis are as follows. Method: The study surveyed 230 high school taekwondo breaking athletes who participated in nationwide taekwondo breaking competitions. The survey was conducted online due to COVID-19. The collected data were analyzed using SPSS 26.0. Frequency analysis was conducted to identify the general characteristics of the study participants. T-test and one-way ANOVA were conducted to find out what the differences were in sports imagery ability among high school taekwondo breaking athletes. The significance level of all the statistics is set to .05. Result: First, as a result of verifying the differences in sports imagery ability according to the gender of high school breaking athletes who participated in taekwondo breaking competitions, statistically significant differences were found in the goal imagery factor. Second, as a result of verifying the differences in sports imagery ability according to the school year of high school breaking athletes who participated in taekwondo breaking competitions, statistically significant differences were found in the strategic imagery factor. Third, as a result of analyzing the differences in sports imagery ability according to the experience of demonstration training of high school breaking athletes who participated in taekwondo breaking competitions, statistically significant differences were found in the strategic imagery factor. Fourth, as a result of analyzing the differences in sports imagery ability according to the number of participation in breaking competitions of high school breaking athletes who participated in taekwondo breaking competitions, statistically significant differences were found in the strategic imagery factor and goal imagery factor. Fifth, as a result of analyzing the differences in sports imagery ability according to the experience of winning in competitions of high school breaking athletes who participated in taekwondo breaking competitions, statistically significant differences were found in the strategic imagery factor and goal imagery factor. Conclusion: As a result of analyzing the differences in sports psychological abilities of high school athletes who participated in the taekwondo competition, there was a statistically significant difference.

Development of Optimal Control System for Air Separation Unit

Daehyun Ji,Sangmoon Lee,Sangun Kim,Sunjang Kim,Sangchul Won 제어로봇시스템학회 2004 제어로봇시스템학회 국제학술대회 논문집 Vol.2004 No.8

마이크로파를 이용한 컨베이어형 연속식 고추 건조기 개발

민병로 ( Byeongro Min ),김형수 ( Hyoungsoo Kim ),인정석 ( Jungsuk In ),김선정 ( Sunjang Kim ) 한국농업기계학회 2019 한국농업기계학회 학술발표논문집 Vol.24 No.2

고추는 기호식품으로 캡사이신에 의한 매운맛과 카로테노이계 색소에 의해 식품에 첨가하여 식품의 냄새와 맛을 증가시키는 효과를 가지고 있다. 우리나라는 기후변화에 따른 날씨가 불규칙하여 건조에 어려움이 발생하고 있으며 품종이 개량되어 과피가 두껍고 면세유의 가격이 상승하여 건조비용이 증가하고 있다. 특히 농촌인구의 고령화, 인구감소 및 노동력 부족으로 인해 고추 재배를 기피하는 현상이 발생하고 있다. 일반적으로 수확하여 건조과정을 거쳐서 건고추로 유통되고 있다. 현재 일반농가에 보급되어 사용하고 있는 화력건조기는 상자형 건조기로 수확한 고추를 여러 단으로 포개 놓고 아래쪽에서 열을 송풍하는 방식으로 유입된 열풍은 고추 상자를 통과하고 일부는 재순환하는 방식을 적용하고 있다. 화력고추 건조기의 성능과 건고추의 품질은 열풍온도, 송풍량 및 배기의 재순환에 의해 결정되고 있지만 건조비용의 상승으로 인해 많은 어려움을 겪고 있다. 본 연구의 목적은 기존의 화력건조기의 에너지 절감을 목적으로 마이크로파를 이용에 고추건조기를 개발하는 것이다. 기존 화력건조기는 고온의 열을 이용하여 건조하는 방식으로 품질의 저하가 발생할 수 있다. 개발한 마이크로파 고추건조기는 세척한 고추를 투입하면 컨베이어를 따라 이동하며 연속적으로 건조가 된다. 또한 저온건조 방식을 적용하여 설정온도로 건조를 수행하여 품질을 향상시켰다. 고추 건조기의 프레임은 하중을 견딜수 있도록 특수강(STD11), 고추와 접촉하는 부분은 스테인레스(Stainless steel)을 사용하였다. 마이크로파 건조기는 건조기 내부에 웨이브를 주어 마이크로파가 반사되며 고추 전체에 열을 가할 수 있게 하였다. 마이크로파를 이용하여 건조하기 때문에 살균, 탈취 및 항균작용에 의해 고추 본연의 색상 및 향기를 유지하였다. 실험결과 고추의 건조시간을 단축하였으며 기존 건조기와 비교하여 에너지 절감이 54%로 향상되었다. 마이크로파를 이용한 고추건조기를 이용한다면 농가의 노동력 절감 및 에너지절감 효과가 발생할 것으로 판단된다.