센서 데이터의 시간 정보를 이용한 이력 정보 관리

이양구,류근호,Lee, Yang-Koo,Ryu, Keun-Ho 한국공간정보학회 2008 한국공간정보시스템학회 논문지 Vol.10 No.4

무선 센서 네트워크는 공간상에 분포되어 거의 무제한적이고, 연속적으로 데이터를 발생시키며, 주로 샘플링이나 시놉시스 등을 이용하여 수집되는 데이터를 저장한다. 그러나 이러한 방법은 원시 데이터의 정확한 저장 및 장기간 수집된 이력 데이터로부터의 분석을 요구하는 응용환경에는 적합하지 않다. 따라서 이 논문에서는 센서로부터 수집된 데이터를 손실 없이 저장하는 동시에 시간에 따라 누적되는 센서 데이터의 이력을 효율적으로 관리할 수 있는 저장 기법을 제안한다. 제안된 방법에서는 센서의 측정값이 변경된 시점을 기준으로 동일한 값이 지속된 기간을 Time-segment와 Time- point로 저장한다. 이러한 방법은 센서의 모든 측정값을 정확하게 저장할 수 있고, 특정 시간에 걸쳐 중복되는 데이터들을 하나의 튜플에 저장하기 때문에 장기간 동안 수집된 데이터를 메모리에서 유지할 수 있다. A wireless sensor network consists of many sensors that collect and transmit physical or environmental conditions at different locations to a server continuously. Many researches mainly focus on processing continuous queries on real-time data stream. However, they do not concern the problem of storing the historical data, which is mandatory to the historical queries. In this paper, we propose two time-based storage methods to store the sensor data stream and reduce the managed tuples without any loss of information, which lead to the improvement of the accuracy of query results.

날씨 마케팅 적용을 위한 기후 데이터의 군집 분석

이양구,김원태,정영진,김광득,류근호,Lee, Yang-Koo,Kim, Won-Tae,Jung, Young-Jin,Kim, Kwang-Deuk,Ryu, Keun-Ho 한국공간정보시스템학회 2005 한국공간정보시스템학회 논문지 Vol.7 No.3

Recently, the weather has been influenced by the environmental pollution and the oil price has been risen because of the lack of resources. So, the weather and energy are influencing on not only enterprises or nations, but also individual daily life and economic activities very much. Because of these reasons, there are so many researches about management of solar radiation needed to develope solar energy as alternative energy. And many researchers are also interested in identifying the area according to changing characteristics of climate data. However, the researches have not developed how to apply the cluster analysis, retrieval and analytical results according to the characteristics of the area through data mining. In this paper, we design a data model of the data for storing and managing the climate data tested in twenty cities in the domestic area. And we provide the information according to the characteristics of the area after clustering the domestic climate data, using k-means clustering algorithm. And we suggest the way how to apply the department store and amusement park as an applied weather marketing. The proposed system is useful for constructing the database about the weather marketing and for providing the elements and analysis information. 최근 환경오염으로 인한 날씨의 변화, 자원 고갈에 따른 국제 유가의 상승 등 날씨 및 에너지 문제가 기업이나 국가 심지어 개인의 일상생활, 경제활동에 크나큰 영향을 미치고 있다. 이와 같은 이유로 대체에너지 중 태양 에너지 개발에 필요한 일사량 관리와 기후 데이터의 변화 특성 등을 근거로 지역성 규명에 관한 연구가 많이 이루어지고 있다. 그러나 아직까지는 데이터 마이닝을 이용한 지역적 특성에 따른 군집 및 체계적인 분석 데이터 검색 서비스가 효과적으로 제공되지 않고 있다. 따라서 이 논문에서는 국내에서 측정된 기후데이터를 저장 및 관리하기 위한 데이터를 모델링하고, k-means 기법을 이용하여 국내 기후 데이터를 지역적 특성에 따라 군집함으로써 체계적인 데이터 정보를 제공한다. 그리고 이러한 정보들이 날씨 마케팅에 어떻게 적용되는가에 대한 사례를 보인다. 제안 시스템은 기업의 날씨 마케팅 연구 및 이에 영향을 미치는 요소와 분석 정보를 제공할 수 있는 기본 데이터베이스 구축에 유용하게 활용될 것이다.

등숙 진전에 따른 도체내 부위별 양분 동태에 관한 연구 I. 도체내 부위별 무기양분의 동태

이양구,임무상,임병기,Lee, Yang-Ku,Lim, Moo-Sang,Im, Byeong-Gi 한국작물학회 1986 한국작물학회지 Vol.31 No.2

In order to clarify the trend of change in mineral nutrients in rice plant on various ripening process, P$_2$O$\sub$5/, K$_2$O, MgO, CaO, SiO$_2$ and ash contents were determined for the grain, internode, leaf-5heath and leaf blade respectively for 9 times at an week interval after heading. Four rice cultivars with different maturity and ecotype were grown under normal cultural conditions for the trial. The contents of mineral nutrients in the brown rice were in the order of Ash, P$_2$O$\sub$5/, K$_2$O and MgO. CaO and SiO$_2$ were found in minute quantity in the brown rice. The hull contained SiO$_2$ in large quantity, and it also contained the mineral nutrients in the order of K$_2$O, P$_2$ O$\sub$5/O. The CaO content of hull was extremely minute.

학교생활체육 분야 게이트볼 활성화를 위한 심판의 공정성 인식 및 직무만족도 탐색

이양구(Yang Gu Lee),김영재(Young Jae Kim),차은주(Eun Joo Cha) 한국사회체육학회 2013 한국사회체육학회지 Vol.0 No.54

This study aims to find a realistic plan for the improvements of a variety of recognition of the fairness of gate ball referees` decisions and training of the referees as the pr oliferation of gate ball games, social interests demanding changes in exercise culture and the efforts of the Korea Gate Ball Union of Sport For All are increasing. Research subjects were 72 Classes 1 and 2 referees who belonged to the Korea Gate Ball Union of Sport For All in 17 cities and provinces nationwide. To verify the differences in each question depending on the demographic characteristics of the research subjects, a t-test, a One-Way ANOVA and a χ2(chi-square) test were carried out, and for significance test, the method of Scheffe test was used. The findings obtained through research are as follows: First, it turned out that the fairness of the gate ball referees` decisions differed depending on the number of activities and their career as referees, and since the respondents recognized that the qualifications of the referees were the biggest barrier in their decisions, it turned out that it was most important to enhance morality to increase the fairness. Second, it turned out that the gate ball referees` job satisfaction differed depending only on their qualifications, the number of activities and career while it turned out that their job satisfaction had significant impacts on the fairness of their decisions. Third, they responded that the appropriateness of the period of the training of gate ball referees was ‘average,’ but they recognized that developing fair referees would be possible through the training of the referees and had a concern that the referees` fair decisions might be difficult if newly appointed referees entered immediately after the training.

대학 교육서비스 환경과 학습동기 간의 상관관계 연구

이양구(Lee, Yang-Gu),김원현(Kim, Won-Hyun) 서원대학교 사범대학 부설 교육연구소 2021 교육발전 Vol.41 No.1

본 연구는 대학의 교육서비스 환경이 학생들의 학습동기에 영향을 미치는 주요 예측변인을 밝히는데 목적이 있다. 연구대상은 충북권 소재 대학에 소속된 재학생 339명이다. 대학의 교육서비스 환경이 학습동기에 미치는 영향을 분석하기 위한 다중회귀분석과 교육서비스 환경을 이용하는 수요자들의 만족도 선택 결정의 인식에 따른 하위 요인들과의 관계를 확인하기 위한 대응일치분석 방법을 사용하였다. 연구 결과, 대학의 교육서비스 환경과 학습동기 간에는 유의미한 상관이 있는 것으로 나타났고, 대학의 교육서비스 환경을 이용하는 학생들의 인식은 대부분 긍정적으로 작용하고 있지만 개선이 필요한 부분(발전적 사회인 양성의 신뢰감, 대학의 복지 시설 충족, 대학의 약속이행, 교직원의 용모, 공지된 학사일정의 진행) 역시 존재하는 것으로 나타났다. 대학 교육서비스의 전략적 운영과 수요자 중심의 맞춤형 프로그램 개발 및 교육 시스템 구축을 위한 지속적인 관심과 노력이 필요할 것으로 보인다. This study aims to reveal the major variables predicting the impact of university education service environment on students’ academic motivation. This study was conducted with 339 students enrolled in a university located in the Chungbuk area. The multiple regression analysis method was used to analyze the impact of the university education service environment on academic motivation, and the correspondence analysis method was used to check the relationships with sub-factors according to the satisfaction and perceptions of career selection and decision of the consumers who use the education service environment. The results of study are as follows. First, it turned out that there was a significant correlation between the university education service environment and academic motivation. Second, as for the perceptions of the students who were using the university education service environment, it acted positively, overall; however, there were also parts that would need improvements (Trust in nurturing developmental members of society, satisfaction of university welfare facilities, the fulfillment of the university’s promises, the faculty members’ appearance, and progress of the announced academic schedule).

디지털 트윈 기반 공장 물류 관리 시스템

이양구(Yangkoo Lee),정우근(Wookeun Jeong),임영재(Youngjae Lim),윤대섭(Daesub Yoon) 한국통신학회 2022 한국통신학회 학술대회논문집 Vol.2022 No.11

RED(Rigid External Distraction) system을 이용한 Crouzon syndrome환자의 distraction osteogenesis

이양구(Yang-Ku Lee),최정호(Jeong-Ho Choi),김석화(Seok-Hwa Kim),백승학(Seung-Hak Baek),장영일(Young-ll Chang) 대한치과교정학회 2002 대한치과교정학회지 Vol.32 No.3

청소년의 비만도와 건강체력의 관계

이양구(Yang Gu Lee),오수학(Su Hak Oh) 한국체육측정평가학회 2012 한국체육측정평가학회지 Vol.14 No.1

이 연구의 목적은 특정 지역 제한과 소수의 연구 대상을 이용한 연구 설계 및 운동관련 체력요인 간의 차이 비교에만 치중하였던 연구의 제한점을 해결하기 위해 전국을 모집단으로 선정하여 청소년들의 비만도와 건강체력의 관계를 밝히고자 하였다. 연구대상은 전국 6개 시·도 각 3개교 중·고등학교 총 18개교(3,047명)의 학생건강체력평가 측정 기록을 토대로 실시하였고, 청소년들의 건강체력 등급에 따른 체지방률 평가기준(NYC & ACSM) 간의 차이와 비만도와 체지방률 평가기준에 따른 건강체력 기록에 차이를 알아보기 위하여 일원분산분석을 실시하였고, 건강체력에 따른 비만도 여부와 건강체력의 관계를 파악하기 위하여 로지스틱 회귀분석 모형을 설정하였다. 본 연구의 결과는 다음과 같다. 첫째, 건강체력 등급별 체지방률은 청소년들 모두 NYC와 ACSM 기준을 적용하였을 경우 건강체력은 아주 높은 1등급부터 보통인 3등급까지 체지방률 분포는 정상 또는 과체중에 속해 있다. 둘째, 체지방률 평가기준별 건강체력은 NYC와 ACSM 기준을 적용하였을 경우 비만도는 체지방률 평가기준에 따라 건강체력 요인별 기록 패턴의 차이가 있다. 셋째, 비만도와 건강체력 요인별 관계에서는 중학교 남학생은 심폐지구력과 근지구력에서, 고등학교 남학생은 근지구력에서 비만군의 건강체력 수준이 정상군에 비해 낮게 나타나고 있어 비만도 여부에 따라 건강체력에 유의한 영향을 미치고 있는 것으로 예측할 수 있다. The present studies to have researched the difference of factors related physical fitness of local area were proceeded, which had the limitation that these results could not represent the a population. Therefore, The purpose of this study was to research the relationship between obesity and health-related physical fitness of whole country teenagers. For the purpose, we choose the 18 schools 3,047 students including middle school(1,993), high school(1,054) which were located in 6 city. With the students` PAPS(physical activity promotion system) records, we analyzed the relationship between obesity and health-related physical fitness according areas. We used SPSS 12.0 program for data management. To analyze the difference of %fat mass according to the level of health-related physical fitness and to research the difference of health-related physical fitness according to the valuations(NYC & ACSM), one-way ANOVA was used and for the relation between obesity and health-related physical fitness logistic regression was used. The results were followed as below : On the %fat mass according the level of health with two valuations(NYC & ACSM), it showed that %fat mass of distribution from 1 to 3 magnitudes were belonged to normal group or overweight group, which indicated that students who were not obesity had more health-related physical fitness than obese group. On the health-related physical fitness according to the valuations(NYC & ACSM), There was some different %fat mass patten on factors of health related physical fitness. Test of hypothesis result about statistical significance about relation by body condition and health & fitness factor. On the relation between obesity and health-related physical fitness, there was model which might indicate health-related physical fitness with obesity in male students, but not females. However, obese group of cardiorespiratory endurance in muscular endurance in middle school, and of the muscular endurance in high school had lower health level than normal students, which showed that obesity might affect the health-related physical fitness in teenagers.

청소년의 방과 후 스포츠클럽대회 활동 정도에 따른 참여만족도 및 학습성과 분석

이양구(Lee, Yang-Gu),권형일(Kwon, Hyung-Il) 한국사회체육학회 2015 한국사회체육학회지 Vol.0 No.60

This study aims to identify the relationship between the participants’ satisfaction with adolescent after-school sports club event activities and their learning performance, according to the level of their activities clearly in order to arouse the people the importance of holistic aspect through expanding the base of sport club events and practicing them. Subjects were 392 students in an elementary and a middle school located in the metropolitan area of Seoul. In order to understand the relationship between the difference in satisfaction, according to the level of participation in the activities and their learning performance with the students who participated in sports club events, models were set up, and t-test, one-way ANOVA and MANOVA were conducted. The obtained results of the study were as follows: First, it was found that there was a difference in satisfaction with adolescent participation in sports club event activities by sex, and it turned out that event facilities (supplementary facilities, accommodation facilities, transportation) and the management of the event (medical services, event promotion) had significant impacts on girl students’ satisfaction with participation. Second, it turned out that there was a difference in the adolescents’ satisfaction with participation in sports club event activities by the level of school, event facilities (game facilities, supplementary facilities and accommodation) had great impacts on the elementary school student participants ’ satisfaction, while the management of the event (progress of games and event promotion) had great impacts on the high school student participants’ satisfaction. Third, it was found that there was a difference in learning performance depending on the level of participation in the adolescent sports club events by each event, and especially, it was expected that there would be differences in the domains of motor skills, peer relations and class attitude. Fourth, it was found that there was a difference in learning performance, according to the number of times of the adolescents’ participation in sports club event activities, and especially, it was expected that there would be differences in all domains of academic record and class attitude, peer relations and motor skills.

기능주의적 관점에서 본 학생선수의 체육 교과태도와 학습의욕과의 관계

이양구(Yang Gu Lee),유정애(Jeong Ae You),전선혜(Sun Hye Jun) 한국사회체육학회 2012 한국사회체육학회지 Vol.0 No.49

In this study, the present study considers the situations in the field more extensively and investigates the actual conditions among student-athletes, aiming to solve the issues associated with the right for learning and find out any relevance between learning desire and P.E. attitude depending on academic achievement levels in ‘student-athletes`` playing active roles in school sports teams. Study subjects are a total of 235 students attending junior and senior high schools located in the capital area. Study subjects` academic achievement scores and a questionnaire survey on P.E. attitudes and learning desire were used to collect data. In order to understand differences and similarities in P.E. attitude and learning desire depending on academic achievement levels in student-athletes attending junior and senior high schools, MANOVA was conducted and a logistic regression model was set for analysis. The findings from the analysis are as follows: First, as for the difference depending on academic achievement levels in junior and senior high schools, a significant difference was found in P.E. attitude sub-factor based on group characteristics of student-athletes. Second, in terms of differences depending on academic achievement levels in junior and senior high schools, a significant difference was found in P.E. learning desire sub-factor based on student-athletes` group characteristics. Third, it was predictable that, in reference to negative affect, physical activities and movements, active participation and enthusiastic performance, P.E. attitude in student-athletes whose academic achievement levels were high was higher than that of the group of lower academic achievement levels. Fourth, in terms of learning attitude and method as well as the sense of competence, it was predictable that the group of higher academic achievement levels had higher P.E. learning desire compared to the group of lower academic achievement levels.