• 한국재난정보학회 논문집
• /
• 제3권1호
• /
• pp.87-101
• /
• 2007

The definition and concept of disasters and their preparedness have been changing according to the modern situation. The basic change is that the concept of absolute standard and prevention of hardware damage in the past have been changing to the concept of relative standard and mitigation of direct damage to human. For achieving the purpose, advanced countries developed and used their own analysis method of hazard and vulnerability for disaster ; ASHE hazard and vulnerability evaluation method, hazard matrix method by CDC, FEMA model method and SMUG hazard priority method. Because each analysis method cannot evaluate the hazard and vulnerability for specific disaster, the advantages and disadvantages should be applied for specific situation of disaster in Korea and new analysis method should be extracted in the future.

• 산업공학
• /
• 제14권1호
• /
• pp.79-83
• /
• 2001

In this paper, we propose a simple method to reduce categorical variables into smaller, but significant numbers, and also demonstrate how the proposed method can be applied to the problem of reduction that empirical research often faces in the course of data processing. For the purpose, we introduce a concept of pseudo-correlation coefficient to make it possible to use factor analysis (FA) as a tool for reducing variables. The main idea of the concept is to deal with the measures of association of categorical variables in the sense of the concept of Pearson's correlation coefficient in order to meet the input requirement of FA. Upon examination of existing measures that could play as pseudo-correlation coefficients, Cramer's V coefficient is selected for the best result among them. To show the detailed procedure of the proposed method, a specific demonstration with the data from 329 R&D projects conducted in 18 private laboratories in electric and electronics industry is presented.

• Asia pacific journal of information systems
• /
• 제16권4호
• /
• pp.203-215
• /
• 2006

The advent of KM(knowledge management) concept have led many organizations to seek an effective way to make use of their knowledge. But the absence of right tools for systematic handling of unstructured information makes it difficult to automatically retrieve and share relevant information that exactly meet user's needs. we propose a systematic method to enable content-based information retrieval from corpus of unstructured documents. In our method, a document is represented by using several key terms which are automatically selected based on their quantitative relevancy to the document. Basically, the relevancy is calculated by using a traditional TFIDF measure that are widely accepted in the related research, but to improve effectiveness of the measure, we exploited 'concept network' that represents term-term relationships. In particular, in constructing the concept network, we have also considered relative position of terms occurring in a document. A prototype system for experiment has been implemented. The experiment result shows that our approach can have higher performance over the conventional TFIDF method.

• 한국보건간호학회지
• /
• 제4권2호
• /
• pp.5-13
• /
• 1990

The purpose of this study was to investigate physical self concept between high school boys and girls and to find various factors affecting them. For the Survey, 331 respondents for boys and 347 for girls were randomly selected from one coeducational high school in Seoul, from May 16 to May 19, 1990. The instrument used in this questionaire survey method was a part of Won Shik Jung's Physical Self Concept Scale for measuring Self Concept, it's reliability was' Cronbach a = 0.718. For the analysis. descriptive statistics were used by calculating frequencies, percentages and mean scores. $X^2-test$, t-test, and analysis of variance were employed to test the differences and statistical significance. The relationship between physical self concept and area variables was analysed by use of Pearson's correlation coiefficients. For the examine of various factors affecting physical self concept, multiple stepwise regression method was employed. The results of this study are summarized as follows: 1. There was no significant difference in physical self concept between male and female students. 2. The scores of physical self concept among the students were negatively correlated with their academic year, even though statistical signification was not found. 3. Physical self concept was classified into two areas; health area and appearance area. There was no significant difference in health area between boys and girls. But, the difference of health area was significant in accordance with the academic years. That, the scores of the health area are dropped as academic year going up. 4. Significant relationship was revealed among health area, appearance area, and physical self concept. The correlation between health area and physical self concept was the highest relationship (r = 0.71) The main factors affecting the physical self concept were (1) father's educational background (2) year (3) number of brother (4) religion (5) father's age. 5. As academic year going up, the rate of counseling with parents are dropped. In conclusion, the result of the study indicate that, a person managed the school health and parents can help students to promote their physical, mental, and emotional health by means of health education and counseling.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2013년도 추계학술대회
• /
• pp.661-663
• /
• 2013

본 논문은 모바일 클라우드에서 급격하게 증가하는 정보 검색을 위한 키워드 기반의 개념 망을 이용한 데이터를 효율적으로 검색 가능하도록 한 모델을 제안한다. 키워드 기반의 개념 망은 온톨로지를 적용한 방식이지만, 사용자가 효율적인 정보 검색을 하도록 지원하기 위해 개념 사이의 연관성을 추가한 것이다. 따라서 본 논문에서는 키워드 중심의 개념 망, 전문가 그룹이 추천한 분야 개념 망 그리고 프로세스 개념 망으로 구성한다. 이러한 3가지 종류의 개념을 이용하여 사용자는 모바일 클라우드 내에서 키워드 기반으로 정보를 검색하고, 검색된 결과에 따라 연관성 있는 정보를 검색할 수 있다.

• 정보처리학회논문지D
• /
• 제15D권3호
• /
• pp.429-440
• /
• 2008

형식개념분석기법(Formal Concept Analysis)은, 주어진 데이터로부터 공통속성을 갖는 객체들을 개념단위로 추출, 계층화하여 데이터에 내재된 개념들의 구조를 가시화 해주는 데이터분석기법으로써, 최근 다양한 분야에서 응용되고 있다. 본 연구에서는, 형식개념분석기법을 토대로, 사용자의 질의에 대한 함의관계(Implication)와 연관관계(Association rule)에 관한 정보추출과, 추출된 제반 정보들을 구조화하여 가시적으로 표현하기 위한 기법을 제안하고, 이를 지원하기 위하여, 함의/연관관계 추출 및 가시화 지원도구인 QAG-Wizard를 개발하였다. 본 연구결과는, 주어진 데이터의 속성을 기반으로 하는 사용자의 질의에 대하여, 데이터에 내재되어 있는 관계정보를 보다 다양하게 추출하고 직관적으로 표현 가능하므로, 데이터분석과 마이닝 뿐만 아니라, 질의기반의 정보검색분야 등에서 다양한 목적에 맞추어 활용될 수 있다.

• 정보과학회 논문지
• /
• 제43권6호
• /
• pp.718-723
• /
• 2016

스트리밍 데이터 분석에서 개념 변화가 일어나는 시점을 정확히 탐지하는 것은 분류 모델의 성능을 유지하는 데 있어서 매우 중요한 작업이다. 오류율은 스트리밍 데이터에서 개념 변화 탐지를 위해 많이 사용되는 척도이다. 그러나 0과 1로 이루어진 이진 값만으로 예측 결과를 묘사하는 것은 분류 모델의 행동 패턴을 나타내는 유용한 정보의 손실을 초래할 수 있다. 이 논문에서는 오류율을 이용하는 대신에 확률 예측치를 사용하여 분류기의 성능 패턴을 묘사하고 급격한 변화를 탐지하는 효과적인 개념 변화 탐지 방법을 제안한다. 합성데이터와 실제 스트리밍 데이터를 이용한 실험 결과는 제안한 방법이 개념 변화 시점을 탐지하는데 뛰어난 성능을 가짐을 보여준다.

• 보건교육건강증진학회지
• /
• 제3권1호
• /
• pp.43-55
• /
• 1985

The recent problems of adolescents are leading us to amphasize school mental health program. Therefore, for the first step of that program, this study was attempted to find out the students' daily life stress, their adaptation beharior to resolve that stress, and their self-concept which has an effect on that beharior, to analyze the relationship among those three variables, and to provide basic data which help maintain and promote students' adaptability and mental health. The subjects were 4 classes each grade, 743 students who were chosen as a sample subject among the total of 3,250 students of a junior girls' school in Seoul by stratified sampling method. The Oquestionnair surrey was done from April 1, 1985 to April 6, 1985. The instruments were (1) a part of Junghoon chois' perceptual Orientation Scale for measuring self-perception of students, (2) Rosenberg's Questionnair for measuring students' evaluation of self-esteem, (3) modified Bell's Adoptive Behavior Questionnair, and (4) the Measuring scale for stress developed by the investigator. The collected data were analyzed by using descriptive statistics, x²-test, t-test, ANOVA, and Pearsons' Correlation. The results are summarized as follows: 1. The range of mean score of self-concept, stress, and adaptation beharior is 1-5 respectively. The mean score of self concept was 3.45. The mean score of stress was 2.53, and the degree of stress was in order of the problem of study and grade marks, girl friend, appearance, and relaxation. The subjects preferred effective long-term adaptation method (Mean=2.81) to ineffective short-term adaptation method. (Mean=2.47) 2. The self-concept had the highest degree when students were 1st grade, in good health condition, taking high grade marks, both parents existing, fathers' educational level being above college, and being in high economic status. The degree of stress was significantly high when students were 3rd grade, in poor health condition, having low grade marks, being in poor economic status, and fathers' educational level being under elimentary school. In relation with adaptation method, 1st grade students used more sbort-term and long-term method, and when students had high grade marks, being in high economic status. they used more long-term adaptation behavior. 3. Two Hypotheses of this research were tested: Hypothesis 1. "The higher the students' self-concept is, the more they use long-term adaptation method." was accepted. (r=.2482, p<.01) (t=-4.99, p<.001) Hypothesis 2. "The higher the students' stress is, the more they use short-term adaptation method." was accepted. (r=.2897, p<.01) (t= -7.51, p<.001) In conclusion, a person in charge of school health can help students to adapt effectively by planning and implementing methods which highten their self-concept and lower their stress. But because the correlation among self-concept, stress and adaptation behavior was at a low level, I think that the study, which confirm the relationship of those three variables, is needed.

• 한국원자력학회:학술대회논문집
• /
• 한국원자력학회 1996년도 춘계학술발표회논문집(1)
• /
• pp.40-45
• /
• 1996

A new concept of equivalent homogenization is proposed. The concept employs new set of homogenized parameters: homogenized cross sections (XS) and interface matrix (IM), which relates partial currents at the celt interfaces. The idea of interface matrix generalizes the idea of discontinuity factors (DFs), proposed and developed by K.Koebke and K.Smith. The method of K.Smith can be simulated within framework of new method, while the new method approximates heterogeneous cell better in case of the steep flux gradients at the cell interfaces. The attractive shapes of new concept are: improved accuracy, simplicity of incorporation in the existing codes, equal numerical expenses in comparison to the K.Smith's approach. The new concept is useful for: (a) explicit reflector/baffle simulation; (b) control blades simulation; (c) mixed UO2/MOX core simulation, The offered model has been incorporated in the finite difference code and in the nodal code PANBOX. The numerical results show good accuracy of core calculations and insensitivity of homogenized parameters with respect to in- core conditions.

• 컴퓨터교육학회논문지
• /
• 제9권3호
• /
• pp.109-119
• /
• 2006

알고리즘은 컴퓨터와 관련된 모든 이론들의 기반이 되는 개념으로 매우 중요하다. 응용문제를 해결하기 위한 컴퓨터 알고리즘에 대한 연구는 많이 있지만 컴퓨터 알고리즘 개념을 어떻게 가르칠 것인가에 대한 효과적인 교수방법에 대한 연구물들은 매우 드물다. 본 논문에서는 초등학교 4학년 수학문제를 이용하여 문제를 해결하는 과정을 통하여 컴퓨터 알고리즘 개념을 학습하는 교수방법을 설계하였다. 설계한 교수방법을 현장에 적용하였으며, 결과 분석을 통하여 제안한 교수방법이 전통적인 교수방법보다 효과가 있음을 보인다.