• 한국과학교육학회지
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• 제12권2호
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• pp.31-42
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• 1992

The purposes of this study were to find out the degree of formation of the concept of density for the junior high students. The changing pattern of concept in acquiring the concept of density and the degree of development of INRC transformation ability related to the concept of density were also analyzed according to cognitive level and teaching method. The results of this study were as follows. 1) The experimental group were more effective than control group in the formation of the concept of density. 2) Even though students had been taught the concept of density, the various types of preconception were remained and persisted. Especially, the students at concrete level had persisted misconceptions and these misconceptions had been changed to the other misconceptions. 3) In the degree of the formation of the transformation ability of INRC group related to the concept of density in solid phase, the experimental group developed much better on both the abilities of Reciprocal transformation, Correlative transformation and the abilities to manipulate two variables such as volume and mass than control group. 4) The correlation coefficient between GALT score and achivement of the concept of density was 0.67. The correlation coefficient between achivement of the concept of density and the formation the transformation of INRC group related to the concept of density was 0.78.

• 정보처리학회논문지:소프트웨어 및 데이터공학
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• 제5권8호
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• pp.361-368
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• 2016

고차원데이터에 대한 차원 감소 기법들은 많이 연구되어져 온 반면, 개념 변동을 가진 고차원 스트리밍 데이터에서 적용할 수 있는 차원 감소 기법에 대한 연구는 제한적이다. 이 논문에서는 스트리밍 데이터에서 적용할 수 있는 점층적 차원 감소 기법들을 살펴보고, 개념 변동 고차원 스트리밍 데이터에 대해 분류 성능을 향상시킬 수 있도록 차원 감소를 효과적으로 적용하는 방법을 제안한다.

• 간호행정학회지
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• 제7권3호
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• pp.415-423
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• 2001

This descriptive study was designed to find out the relation between self concept and ethical concept of nurses. The data were collected from 224 staff nurses in a tertiary hospital located in Suwon city during February 24 to March 7, 2001. Self concept was measured with questionnaire developed by chung (1965) and ethical concept was measured with the questionnaire developed by the researcher. The 5 point Likert scale questionnaire had 95 items. The results were summarized as follows: 1) The mean score of self concept was 3.11. The ethical concept were measured in 4 areas and mean scores were : accountability, 3,93; collaboration, 3.70; caring, 3.63; an advocacy, 3.15. So accountability was the area with the highest score in ethical concept. 2) Nurses' self concept was significantly related to ethical concept (collaboration, r=.34, p<.001; advocacy, r=.32, p<.001; caring, r=.28, p<.001; and responsibility, r=.23, p<.001). 3) The self concept was significant in age(F=3.28, p=.000) and the ethical concept was significant in age(F=15.88, p=.000), education level(t=2.16, p=0.03), career(F=5.16, p=.001) In conclusion, there was a significant relationship between self concept and ethical concept of nurses. High score in accountability may be related to high level of legal responsibility of nurses. This finding suggests that it is the length of nursing career is significantly related to both self-concept and ethical concept. Thus, it is important to improve self concept in order to improve ethical concept of nurses from early the beginning of their career.

• 한국보건간호학회지
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• 제4권2호
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• pp.5-13
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• 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.

• 한국항공운항학회지
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• 제19권2호
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• pp.37-44
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• 2011

This paper summarizes the HVO concept and procedures, presents a summary of the research and results, and outlines areas where future HVO is required. This concept enables people to get their destinations through shortest paths with advanced air traffic control system and equipments. The concept's key feature is that pilots maintain their own separation from other aircraft using air-to-air datalink and on-board software which are needed for supporting flight information present on the high Way in the sky display and airborne internet. By assigning Self-Controlled Area which assume pilot have separation responsibility, controllers evaluated SATS HVO concept as a successful method on the view of reduced workload and increased traffic level on high volume operation.

• 한국수학교육학회지시리즈C:초등수학교육
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• 제2권1호
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• pp.65-73
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• 1998

The purpose of this study is to investigate significant differences of structural knowledges among the groups(high, middle, low) when the 6th grade subjects structured the concepts of the plane figures, triangle and quadrangle, by concept maps, and to analyse the features of concept maps according to hierarchy. For this purpose, the following two research contents were investigated： 1. Investigating significant differences of structural knowledge in the concepts of the plane figures using concept maps among the groups(high, middle, low). 2. Analysing the features of concept maps according to hierarchy. The structural knowledges represented on the concept maps of triangle and quadrangle which were drawn by the subjects were analysed by propositions, hierarchies, and cross-links. Subject-self Reports about how to make the concept maps were used to analyse the features of concept maps according to hierarchy. The conclusions drawn from the results were as fellows： First, there were significant differences among the groups in proposition links. Second, there wasn't my significant difference among the groups in hierarchy. Third, there were significant differences among the groups in cross-links, and Fourth, the results of analysing the concept maps by hierarchy showed that there were differences among the individuals in constructing the knowledges.

• 한국수학교육학회지시리즈A:수학교육
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• 제49권3호
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• pp.299-311
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• 2010

The purpose of this study was to examine the effects of abstraction offer of basic concept principle and feedback of self-efficacy attributional and mathematical study ability of math underachievers in high school based on the attribution theory and self-efficacy theory. The hypothesis were posed as below : Hypothesis 1: The experimental group that takes the abstraction offer of concept principle and attributional feedback training would be better at most self-efficacy than the control group that doesn't. Hypothesis 2: The experimental group that takes the abstraction offer of concept principle and attributional feedback training would have better math achievement than the control group that doesn't. They were divided into an experimental group and a control group, and the attribution disposition, self-efficacy and academic achievement of the children were measured by pretest and posttest. For data analysis, SPSS/PC+ program was employed and t-test was conducted. The main findings of this study were as below : First, the abstraction offer of concept principle and attributional feedback training was effective for enhancing the math self-efficacy in high school underachievers. Second, the abstraction offer of concept principle and attributional feedback training was effective for increasing the math achievement in high school underachievers.

• 한국학교수학회논문집
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• 제15권3호
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• pp.453-465
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• 2012

본 연구에서는 연속함수에 대한 오개념 이미지의 원인을 찾기 위하여 고등학교 수학II 교과서와 수학과 고등학교 교육과정해설서를 조사 분석하고 고등학교 학생들을 대상으로 설문조사를 실시하였다. 그 결과, 고등학교 교과서에서 도입하고 있는 함수의 연속성에 대한 정의 방법이 교과서별로 동일하지 않고, 대학의 공식적인 정의와도 큰 차이가 있기 때문에 연속함수에 대한 학생들의 오개념 이미지가 나타나는 것으로 분석되었다. 따라서 이러한 오개념 이미지를 바로잡기 위해서는 함수의 연속성과 불연속성에 대한 대학의 공식적인 정의를 학교수학에서 적극적으로 수용하여 학생들의 수준에 맞는 방법으로 함수의 연속과 불연속에 대한 정의를 명확하게 제시하여 한다.

• 한국과학교육학회지
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• 제15권4호
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• pp.437-451
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• 1995

Middle and high school students' conceptual understanding about stoichiometry, gas laws, and diffusion was compared with essay type test and multiple choice test. Whereas achievement of high school students was higher in stoichiometry, that of middle school students who were expected to go to high schools was higher in gas laws and diffusion. When students' achievement was compared to that of American college students, Korean students' achievement was higher in stoichiometry and was similar in gas laws. These results indicate that algorithmic problem solving is more emphasized than conceptual understanding in high schools and that quantitative aspects focused in chemistry education are not helpful in concept understanding. Nevertheless relatively smaller difference between concept understanding and algorithmic problem solving for high school students in this study seems to be from concept learning in middle schools.

• 한국지역지리학회지
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• 제20권1호
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• pp.141-151
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• 2014

본 연구는 개방형 질문을 통해서 지역 개념에 대한 고등학교 3학년 학생들(39명)의 이해 유형을 살펴보고, 이에 대한 교수학적 활용을 설명한 것이다. 지역 개념에 대한 학생들의 이해 유형은 개방형 질문에서 수집한 학생들의 의미와 고등학교 교육과정에서 설명하고 있는 지역 개념의 의미를 비교하여, 두 의미 사이의 일치 및 연관 여부로 판단하였다. 연구결과는 다음과 같다. 첫째, 지역 개념에 대한 학생들의 이해 유형은 완전한 이해, 부분적 이해, 모호한 이해, 전환된 이해 등으로 파악되었다. 둘째, 두 의미 사이에 존재하는 옳은 의미의 일치 및 연관 정도는 전환된 이해, 모호한 이해, 부분적 이해, 완전한 이해로 갈수록 높았다. 이를 통해 학생에 따라 지역 개념에 대한 이해의 정도가 서로 다르다는 사실을 확인할 수 있었다. 셋째, 지역 개념에 대한 학생들의 부분적 이해, 모호한 이해, 전환된 이해 등은 교육과정에서 설명하고 있는 지역 개념의 의미와 완전하게 일치하는 경우가 아니므로 오개념으로 판단할 수 있었다. 넷째, 교사는 이러한 오개념을 의미변화를 위한 교육적 대화의 소재로 활용하여 개념변화를 달성할 수 있다.