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컴퓨터교과교육과 컴퓨터과학 : 온톨로지를 활용한 선행조직자 모형기반 중학교 알고리즘 개념학습 전자교과서 설계
김종한 ( Jong Han Kim ),박민규 ( Min Kyu Park ),서인숙 ( In Suk Seo ),최현종 ( Hyun Jong Choe ),김태영 ( Tae Young Kim ) 한국컴퓨터교육학회 2011 한국컴퓨터교육학회 학술발표대회논문집 Vol.15 No.1
본 연구에서는 중학교 컴퓨터 알고리즘 개념 학습에서 어렵게 생각되거나 보충설명이 필요한 개념들을 상위, 하위 관련 개념들로 계층화 시키고, 계층화된 각각의 개념들에 대해 선행조직자 모형을 바탕으로 전자교과서 및 개념메뉴를 설계하였다. 이를 통해 학습자가 전자교과서에서 추상적인 컴퓨터 알고리즘 용어를 학습할 때 간단한 검색동작만으로 그 개념에 관한 경험적 선행조직자와 상위, 하위 및 확장 개념을 동시에 인지할 수 있어 짧은 시간 안에 개념을 정확하고 폭넓게 학습할 수 있을 것이라 기대한다.
혼화재와 혼화제의 조합에 따른 콘크리트의 응결 및 압축강도 특성
김종 ( Kim Jong ),송승헌 ( Song Seung Heon ),전충근 ( Jeon Chung Keun ),한민철 ( Han Min Cheol ),신동안 ( Shin Dong-an ),한천구 ( Han Cheon-goo ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.2
Present paper is to investigate the setting and strength properties of concrete incorporating mineral and chemical admixtures to reduce hydration heat of mass concreting. According to test results, combination of mineral and chemical admixtures resulted in an acceleration of setting time of concrete using early strength development type AE water reducing agent(ESAEWRA) by as much as 30 minutes compared with that using standard type AE water reducing agent. Use of retarding type AE water reducing agent and fly ash 30, 60% led to retard the setting time by as much as 4~7.5 hours. Use of super retarding agent retarded much more by as much as 4.5~28 hours. For compressive strength, combination of ESAEWRA and CKD 10% had larger strength by as much as 5MPa at 3days compared with that of standard type AE water reducing agent concrete. Use of super retarding agent led to reduced early strength while at 28 days it maintained similar strength development.
사회적지원, 부부갈등, 자기효능감, 양육스트레스와 영아기 어머니의 양육행동간 경로분석
김종한(Kim, Jong-Han) 한국산학기술학회 2012 한국산학기술학회논문지 Vol.13 No.9
본 연구의 목적은 영아기 어머니의 양육행동에 영향을 미치는 사회적 지원, 부부갈등, 자기효능감, 그리고 양육스트레스들 간의 관련성을 살펴보고, 이들 변인이 양육행동에 각각 어느 정도 영향을 미치는지를 알아보고자했 다. 이를 위해 육아정책연구소에서 조사한 「한국아동패널연구: 2009년 자료」를 사용하였으며, 대상자는 11∼18개월 의 영아 1,467명(남아 739명, 여아 728명)의 어머니이고, 연구방법으로 양육스트레스, 자기효능감, 사회적지원, 부부 갈등과 양육행동 간의 관계를 알아보기 위해 상관분석을 했으며, 이들 변인의 영향력을 알아보기 위해 경로분석을 실시하였다. 연구결과는 첫째, 양육스트레스, 자기효능감, 사회적지원, 부부갈등과 양육행동 간의 상관은 사회적지원, 자기효능감이 정적 상관(p<.01)을, 부부갈등, 양육스트레스와는 부적 상관(p<.01)이 있었다. 둘째, 양육행동에 대한 이 들 변인들의 중다상관계수는 .533으로써 양육행동 변량의 28.4%를 설명하고 있다. 그 중에 양육스트레스(β=–.396)가 가장 많은 변량을 설명하고, 다음으로는 사회적지원(β=.223)이였다. 부부갈등은 직접적인 영향을 주지 못하였지만 간접적인 효과는 확인된 것으로 보아 양육스트레스를 매개로 나타난다는 것을 시사한다. The purpose of this study is to investigate the relationships of social support, marital conflict, self-efficacy, and mothers' parenting stress, which are known as affecting mothers’ parenting behaviors of infants a lot. To this study, We used of Korea Institute of Child Care and Education’s 「Panel Survey of Korea Child; 2009」 data. The subjects of mothers of 11∼18 months infants 1,467(M=739, F=728). In order to analyze collected data, Person correlation analysis, regression/path analysis were used. The results of the study were as follows: First, the correlations among social support, marital conflict, self-efficacy, and mothers' parenting stress were between -.475 and .401, which are all significant on the level of within p<.01. Of those the correlation between the variable of self-efficacy, and mothers' parenting stress was shown highest as of -.475. Second, the correlations among these variables and mothers’ parenting behaviors of infants were between -.484 and .350(all, p<.01). Mothers' parenting stress shows the highest correlations of all, next social support, self-efficacy, marital conflict in order. Third, multiple-correlation of .533, which explains at 28.4 percentage of total variance of the mothers’ parenting behaviors. And -.396 in the degree of mothers' parenting stress, which explains at 15.7 percentage of the total variance of the mothers’ parenting behaviors, while .223 in social support(4.97%). But marital conflict has not direct effects but indirect effects.
김종한(Kim Jong Han) 한국지역사회학회 2008 지역사회연구 Vol.16 No.1
The purpose of this article is to analyze the comparison of regional employment policies of Busan and Osaka. For this, we first analyze the structure of population and unemployment of Busan and Osaka. The result of this study is can be summarized as follows. First, a whole of Osaka population is almost changeless though a whole of Busan population decreases continuing during the past decade. Second, it is necessary to note the difference of 'the effective job opening-to-application ratio' of Busan and Osaka. Especially, the job hunting difficulty of the youth is serious in Pusan. But, oppositely, it is a more difficult that the enterprise looks for the young person in Osaka. Next, we compared Busan on the following three-kind sides with the regional employment policy of Osaka. That is, the regional employment support policy, the regional job creation policy, and the regional job training policy are them. At the end, we presented the suggestion in the regional employment policy of Busan through such a comparison analysis.
메틸셀룰로오스(MC)계 증점제 혼입에 따른 3D 프린팅 콘크리트용 시멘트계 모르타르의 특성 변화에 대한 기초적 연구
김한솔 ( Kim Han-sol ),장종민 ( Jang Jong-min ),이한승 ( Lee Han-seung ) 한국건축시공학회 2019 한국건축시공학회 학술발표대회 논문집 Vol.19 No.2
Integrating 3D printing into architecture is gaining attention because it allows construction of construction structures without formwork. Among them, 3D printing construction materials must have high flow performance and at the same time ensure the performance that does not collapse during lamination. Therefore, in this study, we tried to determine the fluidity and lamination properties of mortar formulations, and set the thickener incorporation ratio as the formulation parameters. As a result of this experiment, it was confirmed that the lamination performance was secured from the thickening agent mixing rate of 1.5%.