• 한국정보교육학회:학술대회논문집
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• 2007.08a
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• pp.153-158
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• 2007

최근 컴퓨터 교육의 초점은 컴퓨터 내용학으로 소양 교육에 대한 관심이 고조되면서 컴퓨터 과학 요소 및 정보통신윤리 분야를 강화하며 소양 교육과 교과 활용교육 간의 연계를 통하여 효과적으로 교육 목표를 달성할 수 있도록 하였다. 이에 따라 일선 학교에서 컴퓨터, 컴퓨터 통신, 멀티미디어, 인터넷 등의 첨단 정보 매체를 교수 학습에 어떻게 활용할 것인가에 대한 관심을 넘어 정보 교육 본질적인 관점에서 교육 방법을 찾고자 노력이 고조 되고 있다. 본 연구에서는 초등학생들에게 지도하기 어렵고 학생들이 이해하기 힘든 컴퓨터과학에 기본이 되는 컴퓨터 내용학 중 자료구조의 검색과 정렬 중 정렬 알고리즘에 대해 교수 학습방법을 설계해 이를 지도해 보고 이러한 학습내용이 초등학교 학생들에게 효과적으로 학습되는 모형을 적용하여 실효성과 이해를 높일수 있으리라 기대한다.

• Proceedings of the KIEE Conference
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• 2004.11c
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• pp.687-689
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• 2004

As using of network increases rapidly, performance of system has been deteriorating because of the overhead and bottleneck. Nowadays, High speed I/O network standard, that is a sort of PCI Express, HyperTransport, InfiniBand, and so on, has come out to improve the limites of traditional I/O bus. The InfiniBand Architecture(IBA) provides some protocols to service the applications such as SDP, SRP and IPoIB. In our paper, We explain the architecture of IPoIB (IP over InfiniBand) and its features in channel based I/O network. And so we provide a performance evaluation result of IPoIB which is compared with current network protocol. Our experimental results also show that IPoIB is batter than TCP/IP protocol. For this test, We use the dual processor server systems and Linux Redhat 9.0 operating system.

• Journal of Power System Engineering
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• v.5 no.3
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• pp.56-63
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• 2001

A slitter is a sort of machinery to cut sheet materials in rolls continuously in the longitudinal direction. Recently slitter line users have requiring higher quality and precision in products in addition to high productivity. A finite element analysis has been performed to investigate the effect of processing factors on shear planes in the slitting of Shrinkage Band(S,K.B.). For the analysis, Hot-dip 55% aluminum-zinc alloy-coated steel sheets and coils(SAZCC) is selected as a material. The results obtained are that deformation was concentrated along the very narrow zone and the maximum slitting load decreases by increasing the knife clearance. Also effective strain decreases according to the clearance increases.

• Communications for Statistical Applications and Methods
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• v.10 no.2
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• pp.371-385
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• 2003

In this paper, contour plot is considered as a method to explore the structure of categorical data. For this purpose, the paper suggests a method to sort two-way contingency table with respect to the expected marginals. It is found that the suggested plot provides us with valuable information for the underlying data structure. Firstly, we can investigate independency between the categories by examining the differences of expected frequency contours and observed frequency contours. With the plot, we can also visually investigate the existence of outliers inherent in the data. These properties of the suggested contour plot will be demonstrated by several sets of real data.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2003.09a
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• pp.392-394
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• 2003

There is a well-known simple, stable standard merge algorithm, which uses only linear time but for the price of double space. This extra space consumption has been often remarked as lack of the standard merge sort algorithm that covers a merge process as central operation. In-place merging is a way to overcome this lack and so is a topic with a long tradition of inspection in the area of theoretical computer science. We present an in-place merging algorithm that rear-ranges the elements to be merged by rotation, a special form of block interchanging. Our algorithm is novel, due to its technique of determination of the rotation-areas. Further it has a short and transparent definition. We will give a presentation of our algorithm and prove that it needs in the worst case not more than twice as much comparisons as the standard merge algorithm. Experimental work has shown that our algorithm is efficient and so might be of high practical interest.

• Korean Journal of Child Studies
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• v.22 no.3
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• pp.31-48
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• 2001

This study was designed to examine various patterns of developmental change in children's recall, strategic behaviors, and meta-memory with a sort-recall task in relation to utilization deficiencies. Memory tasks consisting of 18 pictures were presented individually to 48 seven-year-old children in each of 7 sessions. Sessions 1 and 2 were baseline; Sessions 3 and 4 were for strategy training, including the organization group, the self-regulation group, the organization/self-regulation group and control group. Sessions 5, 6, and 7 were unprompted tests of strategy maintenance. Results showed significant differences between the 4 groups in their recall, strategy repertories and strategy evaluation. Findings were discussed in terms of the analysis of memory strategy and memory development.

• Korean Journal of Child Studies
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• v.17 no.1
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• pp.213-226
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• 1996

The aim of this study was to investigate the relationships of mothers' authoritative and authoritarian childrearing attitudes to their 5-year-old children's attachment representations and to teacher-rated social competence. The sample consisted of 69 mothers and their 5-year-old children from intact families. Children were interviewed to assess the quality of their attachment representations using Slough & Greenberg's(1990) version of the Separation Anxiety Test(SAT). Mothers were administered the Childrearing Practices Report Q-sort(Block, 1965) and filled out questionnaires regarding their childhood experiences, their marital relationship and their psychological well-being. In addition, teachers rated children's social competency in school settings using Kohn's(1972) Social Competence Scale. Hierarchical multiple regression showed that mothers' high scores on affective components of authoritative parenting and low scores on authoritarian attitudes are closely associated with children's secure attachment as well as teacher-rated social competence.

• Korean Journal of Child Studies
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• v.25 no.2
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• pp.71-79
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• 2004

The primary purpose of this study was to examine what social behaviors are valued within Korean culture for children of preschool age. The sample consisted of 40 mothers of preschool children and 40 preschool teachers. Two instruments were used : an open-ended interview and the Preschool Behavior Q-sort(Baumrind, 1968). Korean mothers and preschool teachers emphasized social behaviors based on cultural values. However, social behaviors that Korean mothers and preschool teachers emphasized were not, for the most part, the expected behaviors about respect for authority or obedience. Rather, they valued considerateness, politeness, mastery behaviors that represent another aspect of traditional values.

• Proceedings of the Korea Concrete Institute Conference
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• 2001.05a
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• pp.941-946
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• 2001

In this study, three kinds of fine aggregate (river sand, sea sand, crushed sand) were used and four different s/a (38%, 40%, 42%, 45%) were applied separately to this experimental for get the conclusion written below. Regardless of kinds of fine aggregate and casting-curing condition, maximum unit weight is seen at 40% of s/a and also to be seen in case of crushed sand. It's for that specific gravity of crushed sand is bigger comparatively than river sand and sea snad's one. Compressive strength is measured river sand, crushed sand, sea sand by order of size ; Regardless of variation of s/3, casting-curing condition and age. Compressive strength recorded maximum when s/a is 42% whatever sort of fine aggregate are. As the result, according to references, the optimum s/a of underwater antiwashout concrete is 40% but in this study, from compressive strength of view, the optimum s/a of underwater antiwashout concrete is 42%.

• Proceedings of the Korea Concrete Institute Conference
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• 2001.05a
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• pp.745-750
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• 2001

This study is about application to real construction site of estimating a early strength with use of microwave. Based on the exist studies, it is tried to confirm the correlation between curing temperature and estimating early strength method with microwave. The result of this study are as follows. 1) Coefficient figure of common use concrete's accelerating strength and 28 days strength after curing at $10^{\cire}C$, $20^{\cire}C$, $30^{\cire}C$ is 0.84, 0.80, 0.80 2) Coefficient figure of concrete's-has a low fine aggregate ratio- accelerating strength and 28 days strength after curing at $10^{\cire}C$, $20^{\cire}C$, $30^{\cire}C$ is 0.86, 0.82, 0.81