Direct Dynamic Simulation Approach 기반의 Receding Horizon Control

유소정(So Jeong Yoo),이상벽(Sang Pyuk Lee),안준영(Jun Young Ahn),김창주(Chang Joo Kim) 한국항공우주학회 2023 한국항공우주학회 학술발표회 논문집 Vol.2023 No.11

부가 중합형 실리콘 인상재에서 발생하는 수고 기체가 경석고 표면에 미치는 영향

유소정,이근우,김경남,Yoo, So-Jeong,Lee, Keun-Woo,Kim, Kyeung-Nam 대한치과보철학회 1996 대한치과보철학회지 Vol.34 No.2

To determine the factors to affect on stone surface porosities produced from hydrogen gas of additional silicone, both putty and syringe type of 7 commercially different additional silicone impression materials(Blend-A-Scon, Correct VPS, Exaflex, Express, Extrude, Provil, Reprosil) were chosen and NewFujirock(GC) was poured into the impressions of detail-reproducing test block at 1, 15, 30, 45, 60 minutes after the impression materials had set and 4 specimens were made for each pouring time, each type of impression material, and each consisency and So, 280 specimens were made in total. The number of surface porosities of same area($2826 mm^2$) which were typically caused by hydrogen gas using the stereoscope(X 7.5) by two observers. Comparison of putty-syringe type and among the impression materials are tested by Kruscal-Wallis method and Mann-Whitney method(p<0.05). The results are as follows. 1. The number of porosities decreased as the pouring time of stone was delayed on both putty and syringe type of additional silicone materials. 2. The putty type significantly produced more porosities than syringe type except for the group of Reprosil.(p<0.05). 3. In case of putty type, the number of porosities increased as following order. Reprosil / Blend-A-Scon and Provil / Correct VPS and Extrude / Express and Exaflex. 4. In case of syringe type, Blend-A-Scon and Extrude produced no porosity and Exaflex and Provil at 30 minites, but Express produced porosities even at 60 minutes and the most. Additional silicone impression material releases hydrogen gas, and that fact can make the resulting die stone model useless. So, to minimize these adverse effects, it is desirable not to expose putty type of additional silicone on critical impression surface because putty type has a tendency to produce more porosities than syringe type. And it is important to have sufficient time before pouring the stone on impression because porosities produce less as time passes after setting of impression material. Also, there are differences among 7 additional silicone impression materials, so it is desirable to choose adequate brand of additional silicone for good laboratory work.

백스텝핑 제어기법 기반 경로 추종 제어기의 제어 이득 값 설정 기법 연구

유소정(So Jeong Yoo),박준상(Jun Sang Park),이상벽(Sang Pyuk Lee),이강현(Kang hyun Lee),김창주(Chang Joo Kim) 한국항공우주학회 2023 한국항공우주학회 학술발표회 논문집 Vol.2023 No.4

불교 명상과 비대면 상담 -청소년명상 습관 개선을 중심으로

유소정 ( Yoo So Jeong ) 한국명상심리상담학회 2021 명상심리상담 Vol.26 No.-

목적: 감사-보은에 기반한 불교 명상'(Thanks-Gratitude Meditation, TGM ) 프로그램이 청소년의 습관 개선에 어떤 영향을 미치는지 알아보는 것이다. 방법: 서울지역 고교 1학년 학생 중 불교 명상을 이용한 집단상담 신청자 20명이 실험군과 대조군에 무선으로 배정됐다. 실험군은 불교명상, 자기조절능력, 사회적문제해결능력 측정 등을 활용한 총 10회의 상담을 진행했으며, SPSS 21.0프로그램, 대응표본 t- 검증, 참가자, 연구자 소감을 질적자료로 활용했다. 결과: 참여자들의 자기조절능력과 사회적문제해결능력이 향상되었고 습관 개선에 긍정적인 영향을 미쳤다. 결론: 이번 연구는 불교명상을 활용한 비대면 상담 프로그램을 개발해 청소년에게 적용해 그 역할과 기능을 밝혀냈다는 점에서 의미가 있다. Purpose: It is to find out how the Thanks-Gratitude Meditation (TGM) program affects Youth' habits improvement. Methos: Among the first-year high school students in Seoul, 20 applicants for group counseling using Buddhist meditation were wirelessly assigned to the experimental group and the control group. The experimental group conducted a total of 10 consultations using Buddhist meditation, self-regulation, and social problem-solving skills, and used the SPSS 21.0 program, response sample t-verification, participants, and researchers' impressions as qualitative data. Result: Participants' self-regulation and social problem-solving skills improved and had a positive effect on habit improvement. Conclusion: This study is meaningful in that it has developed an Untact counseling program using Buddhist meditation and applied it to Youth to reveal its role and function.

하악골과 장골의 조직형태계측 비교

유소정,정문규,Yoo, So-Jeong,Chung, Moon-Kyu 대한치과보철학회 2000 대한치과보철학회지 Vol.38 No.1

To demonstrate possible influences of general bone density on the mandible, histomorphometric analysis was carried out in mandibles and iliac bones and the correlation of the two bone densities was tested. Comparison of bony density in women and men over 60 years in the mandible was carried out too. Quantitative computed tomography(QCT) was taken in cross-section of mandibles at the same site where histomorphometric analysis was peformed to evaluate the reliability of QCT. The analysis included 40 cadavers with no known diseases affecting the bones. The subjects consisted of 15 females and 25 males with a mean age of 60.3 years. Spearman correlation analysis and Wilcoxon rank sum test was performed. The results were as follows. 1. There was statistically no correlation between the mandible and iliac bone in the values of corrected cortical width(CCW), cortical porosity(POR) in cortex, and total bone volume(TBV), mean trabecular plate thickness(MTPT), mean trabecular plate density(MTPD), and mean trabecular plate separation(MTPS) in trabecular bone. 2. Comparison of women and men over 60 years, men had statistically higher bone density than women except fir POR of buccal and lingual cortex, and WTPD of alveolar trabeculae in mandible. 3. There was statistically significant correlation between TBV of trabecular bone and CT No., but not between POR and CT No. in mandible. According to the results above, there was no correlation between mandible and iliac bone density and between mandibular bony density and age. Further studies are required to support the results. A more noninvasive method to be able to measure the bone density of mandible should be developed and it is necessary to accumulate data on the normal values of bone density of mandible according to age and sex. Further study should be carried out about QCT to measure mandibular bony density using QCT.

치과종사자의 손 위생 신념 및 손 위생 활동과 손 위생 수행률의 관련성

정주희 ( Ju-hui Jeong ),노희진 ( Hie-jin Noh ),유자혜 ( Ja-hea Yoo ),문소정 ( So-jung Mun ) 한국치위생학회 2017 한국치위생학회지 Vol.17 No.2

Objectives: This study was conducted to identify the correlation between belief in hand hygiene, activities and related hand hygiene performance rates among dental staff. Methods: This study was based on the evaluation of 329 dental practitioners, including dental hygienists who work at dental clinics, dental hospitals, general and university dental hospitals in Seoul, Gyeonggi-do Province, and Incheon. The questionnaire consisted of a total of 46 questions, including 7 questions on general characteristics, and 25 questions on hand hygiene beliefs, and 5 questions on hand hygiene activities, and 9 questions on hand hygiene practices. This study used 291 subjects for the final analysis, excluding subjects who had provided incomplete or inappropriate responses to the questionnaire. The collected data were analyzed using an independent t-test, ANOVA, x² test, correlation analysis, and multiple linear regression analysis, where p-values of <0.05 were considered statistically significant. Results: Longer clinical career was associated with a significant increase in behavior and norm beliefs, but no sequential difference in control beliefs. The hand hygiene performance was higher in staff at larger hospitals after contact with pollutants and contaminated environments. Higher age was associated with a significant increase in hand hygiene performance rates, but profession was not statistically significant in the performance rate of hand hygiene. The hand hygiene performance rate was ranked higher among those with average work hours per week of greater than 8 hours followed by those who worked fewer than 8 hours. Fewer work hours per week, a stronger belief in hand hygiene, less frequent exposure to contaminated environments, and a greater number of hand hygiene performance had a positive effect on higher hand hygiene performance rates. Conclusions: In order to increase the hand hygiene performance rate of dental practitioners, it is considered that required time for hand washing should be ensured sufficiently. Proper usage of hand sanitizers should also be promoted efficiently.

치과종사자의 손 위생 신념 및 손 위생 활동과 손 위생 수행률의 관련성

정주희 ( Ju-hui Jeong ),노희진 ( Hie-jin Noh ),유자혜 ( Ja-hea Yoo ),문소정 ( So-jung Mun ) 한국치위생학회 2017 한국치위생학회지 Vol.17 No.3

영화를 활용한 국사 수업 모형 개발

이종경,유소정 이화여자대학교 사범대학 교과교육연구소 2004 교과교육학연구 Vol.8 No.2

본 연구의 목적은 영화를 활용한 국사 수업 모형을 개발하는데 있다. 본 연구를 위해 한국사 관련 영화 중 관련 자료가 풍부하며 역사적 고증을 거친, 전통적인 역사 영화 [개벽]과 신문화사적 연구 성과가 엿보이는 새로운 역사 영화 [YMCA 야구단]을 선정하고 각각 25분 정도로 편집하였다. 영화를 활용한 수업에 대한 학생들의 이해 정도를 알아보기 위해 활동지를 제작한 후, 고등학교 2학년을 대상으로 수업을 실시하고 그 결과를 객관적으로 분석하였다. 연구의 결과는 다음과 같다. 첫째, 영화를 활용한 국사 수업은 학생들의 수업 내용에 대한 이해를 높이고 역사에 대한 흥미와 관심을 향상시키는데 도움이 되었다. 영화 선정 및 편집 과정에 학생들을 참여시킨다면 자기 주도적 학습의 효과 뿐 아니라 영화 편집상의 기술적․시간적 문제까지 해결할 수 있으리라고 본다. 둘째, 영화 [개벽]과 [YMCA 야구단]을 활용한 국사 수업은 학생들의 역사 이해 함양에 도움을 주었다. 즉 역사적 사실과 정보의 이해, 역사적 시간성의 이해, 역사의 상상적 이해 영역 및 역사적 탐구력, 역사적 판단력 에 대한 학생들의 이해 능력은 높게 나타났다. 셋째, 학생들은 하나의 역사적 사실 또는 상황에 대해 개인이 처한 입장에 따라 다양한 시각과 관점이 존재할 수 있음을 파악할 수 있었다. 학생들은 영화와 관련 사료들을 해석하고 추론하고 종합함으로써 균형 잡힌 시각을 갖고 올바른 판단을 내리고자 하였다. 이러한 연구를 통해 본 연구자는 영화를 활용한 국사 수업 모형이 역사에 대한 학생들의 동기 유발과 관심을 증진시키고 더 나아가 역사 교육의 목표를 달성하는데 유용한 교과 교육 방안이 될 수 있음을 확인하였다. The purpose of this study is to develop a working model of teaching Korean history through film in high school. Tow films, [Kaebyeok (the Creation)] and [YMCA Baseball Team] are selected, edited, and presented in classrooms of the second year High School students. We also present written records and photographs by foreigners showing relevant contemporary Korean scenes to find out whether the students may build their own viewpoints and judgments concerning historical facts and situations for themselves. We edit each movie in about 25 minutes so that it could be fit in a 50 minutes lesson, and prepare activity forms in order to help students better understand the relevancy of films to classroom contents. The questionnaire was developed to find out students' reaction to the teaching through film. Then we analyze the difficulty, the discrimination and the reliability of each item in the activity forms by using the BayesiAn 1.0 for Windows and Microsoft Excel. The findings are as follows. First of all, teaching Korean history through films are helpful in elevating the students' understanding on the contents of lesson as wel as improving their interests in the history subject in general. Secondly, this study finds out that this teaching method help students gain higher sense of achievement in history class. In this paper, we find that the developed model of teaching Korean history through films can induce motivates and promotes not only interests in history lesson but also achievements in history subjects.