• Asia pacific journal of information systems
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• 제21권2호
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• pp.43-58
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• 2011

Support vector machines (SVMs), a machine learning technique, has been applied to not only binary classification problems such as bankruptcy prediction but also multi-class problems such as corporate credit ratings. However, in general, the performance of SVMs can be easily worse than the best alternative model to SVMs according to the selection of predictors, even though SVMs has the distinguishing feature of successfully classifying and predicting in a lot of dichotomous or multi-class problems. For overcoming the weakness of SVMs, this study has proposed an approach for selecting features for multi-class SVMs that utilize the impurity measures of classification trees. For the selection of the input features, we employed the C4.5 and CART algorithms, including the stepwise method of discriminant analysis, which is a well-known method for selecting features. We have built a multi-class SVMs model for credit rating using the above method and presented experimental results with data regarding S&P 500 companies.

• Human Ecology Research
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• 제60권3호
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• pp.359-376
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• 2022

Based on an ecological model of teacher agency, the purpose of this study was to examine the relevance of HE (home economics) subjects and CSE (comprehensive sexuality education) for HE teachers, and their implementation in HE classes. To achieve this, a survey was conducted with HE teachers nationwide for which 243 responses were collected, and interviews were conducted with five HE teachers who were actively practicing CSE. The results of the survey and interview were as follows. First, HE teachers strongly recognized the relevance of HE subjects and the topic of CSE with an average score of 4.63 (out of 5 points), and practiced CSE at an average of 72.23% (97.12%~43.21%) in their class. Second, based on the ecological approach model of teacher agency, the factors facilitating the CSE practice of HE teachers included: childbirth and parenting experienced as parents, experiences of students encountering sexual problems in school, the philosophy and content of HE subjects, positive feedback from students and support from fellow teachers, and intention to help students in their lives. Conversely, HE teachers cited a lack of sexual education experience as learners, complaints from parents, weakness of HE teacher networks, lack of specific statements in curriculum and textbooks, insufficient class content and teacher training, and lack of absolute class time. This study is significant in revealing that CSE is highly relevant to the contents of HE subjects and is already being practiced in HE classes.

• The Journal of Korean Physical Therapy
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• 제16권4호
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• pp.246-263
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• 2004

Some Students have suffer from a back pain due to their situations. So, the respondents were asked about their demographic factors, the existence of a back pain and environment. Their muscles power and spine were estimated 'Digimax and spine mouse'. The data were analyzed by SPSSWIN. 1. The degree of a back pain before exercise correlated with time of class in school, time of sitting a day. 2. Weakness of back muscles have suffer from a back pain. 3. After MTT(Medical training therapy) exercise, back muscle power increase of 2kg and back pain decrease.

• 대한한방내과학회지
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• 제21권4호
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• pp.641-647
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• 2000

Objective : The purpose of this study was to examine the mood disorder, especially depression and anxiety which have an effect on rehabilitation in stroke patients. Methods : Subjects were 32 stroke patients who were inpatients and outpatients at Woosuk University oriental hospital. The degree of depression and anxiety was measured by the Beck Depression Inventory(BDI) and State-Trait Anxiety Inventory(STAI, State Anxiety Inventory : SAI, Trait Anxiety Inventory: TAI). Other questionnaire included sex, age, onset of stroke, degree of education, econommic class, religion, relationship with family, expectancy on treatment, side of hemiplegia, weakness grade of hemiplegia. Results : Results were as follows. 1. The average scores of SAI, TAI and BDI were 45.7, 46.7 and 19.9. The percentages of patients who had relatively high SAI, TAI and BDI scores were 75%(>36 point), 87.5%(>36 point) and 56.2%(>16 point). 2. SAI was correlated with onset of stroke(p<0.05), religion and relationship with family(p<0.1 ), TAI with religion and BDI with weakness grade of hemiplegia(P

• 예술인문사회 융합 멀티미디어 논문지
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• 제7권11호
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• pp.305-314
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• 2017

본 연구의 목적은 교육복지우선지원사업의 실태를 파악하고, 향후 사업이 나아갈 방향을 제시하는데 있다. 연구목적을 위해 온라인 설문조사를 실시하고 관련 문헌연구, 교육복지우선지원사업 담당자를 대상으로 한 심층면담, 17개 시도교육청 및 교육부 관계자를 대상으로 한 세미나를 실시하여 결과를 보완하였다. 이를 근거로 현 상태를 진단하고 향후 해결해야할 과제를 제시하였다. 연구결과, 교육복지우선지원사업은 2003년 교육복지투자우선지역 지원사업을 시작으로 사업의 효과성이 증명되면서 지속적으로 확대되었다. 그리고 초중등교육법 시행령 개정 및 교육부 훈령 제정 등을 통해 법적, 제도적 안정성을 확보해 나갔다. 하지만 시도교육청으로 사업이 이양된 이후 사업이 활성화되지 못하고 점차 축소되고 정체성의 위기마저 겪고 있는 것으로 파악되었다. 본 연구에서는 이러한 결과를 종합하여 향후 해결해야 할 과제로 분명한 사업의 목적과 방향설정, 중앙정부의 기능 정상화, 초중등교육법 제28조 개정을 통한 '학습부진아 등'의 개념보완을 제시하였다.

• 한국정밀공학회지
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• 제30권11호
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• pp.1203-1210
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• 2013

Korea's first Naro-Science small class satellite was launched by Naro launcher in 2013. The structure of the satellite is mostly composed of aluminum honeycomb and frame. The honeycomb structure is homogenized with asymptotic homogenization method and its mechanical properties were used for the numerical analysis. There have been some difficulties to modeling the honeycomb sandwich panels for FEA. In the present study, the mechanical characteristics of the sandwich panel composite were numerically computed and used for the simulation. This methodology makes it easy to overcome the weakness of modeling of complicated sandwich panels. Both an experiment of vibration test and numerical analyses were conducted simultaneously. The analysis results from the current homogenization were compared with that of experiment. It shows a good agreement on the dynamic responses and certified the reliability of the present methodology when manipulate sandwich panel structure.

• 한국실천공학교육학회논문지
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• 제3권2호
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• pp.47-52
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• 2011

최근 공학교육의 실효성을 향상시키기 위해서 교수자 중심의 지식 전달을 중시하는 전통적인 교수법에서 벗어나, 프로젝트기반학습, 문제중심학습 등 다양한 교수법을 활용하고 있는 추세이다. 그 가운데 특히 습득한 지식을 바로 활용해 볼 수 있는 프로젝트를 수행함으로써 실무능력을 향상시킬 수 있는 프로젝트기반학습(PBL)의 활용이 증가하고 있다. 하지만 프로젝트를 수행한다고 해서 무조건 PBL을 제대로 활용하고 있다고 판단하기는 어렵다. 즉, 강의 시간에 학생들에게 프로젝트를 수행시키는 교수자는 많지만, PBL을 제대로 활용하는 교수는 그리 많지 않다. PBL을 제대로 따라서 본 논문에서는 공학교육에서 PBL을 제대로 활용하는데 지침이 될 수 있도록, 컴퓨터공학의 데이터베이스(DB) 교과목에서 다년간 PBL을 활용해본 경험을 토대로, PBL의 수행과정과 프로젝트 주제 평가기준, 팀 프로젝트 평가방법, PBL의 수행여부 평가표 등을 제시하였다. 또한, PBL 활용의 장단점을 분석하여, PBL을 보다 효과적으로 활용하기 위한 보완사항을 제안하였다.

• 한국초등과학교육학회지:초등과학교육
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• 제29권2호
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• pp.207-218
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• 2010

The revised curriculum in 2007 adds an open inquiry approach to increase students' creativity and interest in science. Because it is the first time for elementary students to perform the open inquiry due to the national curriculum, it is essential that teachers give students' successful experiences in order to build a positive impression about inquiry activity. The purpose of this research is to develop and apply the open inquiry program. The research findings are as follows: First, we analyzed the students' traits of open inquiry ability during the program. The third and fourth grade students showed weakness in operating and inquiring abilities. They also feared failure and were unable to concentrate in classes which were based on explanation or discussion. When students had unexpected results, however, their inquiring abilities and creativeness increased considerably. Additionally there were some students who were stressed during the science-inquiry activity, due to no interest in science and an inability to think scientifically. Second, we developed an open inquiry program for elementary students. The program was modified, reflected upon the students' traits during open inquiry in class. Through repeated feedback like this, we completed the program. Third, for those who studied in the lessons there was a meaningful change in students' science inquiry abilities and abilities to perform 'formulating a hypothesis' and 'the control of variables'. These students' level of self-inquiry performance improved steadily. Moreover, they obtained a strong attachment to their inquiry and understood the method of quantitative experiments.

• 한국지역사회생활과학회지
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• 제18권2호
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• pp.335-348
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• 2007

This study aimed to investigate how the current elementary school teachers think about nutrition education, how they are teaching, and what kind of problems have occurred. And this study was made to provide basic materials to be used for the effective nutrition education in the elementary school. The survey was done on 60 elementary school teachers and 570 elementary school students of the 5th and 6th grade in Gyeonggi Province by questionnaire and analyzed for the perception of nutrition education, current status of nutrition education, nutrition knowledge and cooking knowledge. The average scores of nutrition knowledge were 2.72 for male and 3.75 for female students out of full score of 5. The fifth grade students learned more nutrition education than the sixth grade ones in accordance with the different curricula. Nutrition education was taught as apart of other subjects(87%) and mainly done by lectures. For most of the students, information source of the nutrition education was the meal service(47.4%) and the most common one was the Internet that 38.1 % of the teachers used. Most of the students responded that nutrition education was necessary in the curriculum of elementary school for proper growth(36.2%), intelligence(25.9%), health(21.5%), and dieting(16.4%). The perception for the suitable teacher was in the order of nutrition specialist and dietician. And the right time of the related class was in the order of spare time everyday, a special activity time, and the meal service time. The important contents of nutrition education were in the order of proper eating habits, growth & nutrition, food hygiene and diseases. Nutrition problems of the elementary students were in the order of unbalanced diet, too much ingestion of processed and instant foods, lack of table manners, and child fatness and weakness. 80.0% of the teachers supported the early nutrition education and demanded it should begin when children are in kindergarten. The analysis showed that nutrition education should be taught by parents(29.4%), teachers(29.2%), and nutritionists(25.9%) and that family and school should cooperate closely. Main responses of the teachers to the children's problems were that they had too much instant food, did not eat in a variety, and had no manners in eating. Ironically, they thought malnutrition, fainting and growth stunt were not important nutrition related problems.

• 한국융합학회논문지
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• 제6권6호
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• pp.293-299
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• 2015

MOOC(Massive Open Online Course)란 대단위로 누구나 무료로 수강할 수 있는 온라인 강좌이다. 이러한 MOOC가 기존 대학체계를 무너뜨리고, 교육의 새 지평을 열 것이라는 전망이 있었다. 그러나 MOOC는 기존의 고등교육기관을 위협할 것이라는 최초의 전망과는 다른 양상으로 진행되고 있다. 그래서 본 연구는 MOOC의 허와 실을 드러냄으로써 MOOC를 우리 고등교육의 실정에 맞게 제작하고 활용할 수 있는 논의의 시발점을 마련하고자 한다. MOOC는 기본적으로 온라인 교육이므로 기존 온라인 교육의 본질적인 문제점인 '상호작용, 감독 및 평가'의 문제를 그대로 계승할 수밖에 없다. 그리고 새로이 추가된 'Massive' 개념은 교육 현장에서 가장 민감한 부분인 강좌당 학생 수 문제를 불러일으키며, 'Open' 개념은 MOOC가 불특정 다수를 염두에 둔 강좌이므로 맞춤형 교육에 역행된다. 결론적으로 MOOC는 자기 주도적 학습 능력이 매우 탁월한 학습자들과 전통적인 온라인 고등교육기관에도 접근할 수 없는 사람들을 위한 교육 서비스로 자리매김 되고, 대학에서는 Flipped Learning의 수단으로 사용될 가능성이 매우 높다. 그러므로 향후 MOOC에서는 이 점이 고려되어 강좌의 대상에 맞게 차별화되어 개발될 필요가 있다.