• 대한전기학회:학술대회논문집
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• 대한전기학회 1988년도 전기.전자공학 학술대회 논문집
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• pp.161-164
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• 1988

The purpose of this paper is to propose a simple firmware realization of PCM framing system, which exploits LSI memories for performance improvement and hardware simplification. The proposed system simply consists of a tapped delay line for simultaneous observation of in framing-bits and ROM programmed sequence controller for framing process. Perpormance analyses are made in terms of misframe interval, sync-loss-detection time and reframe time. The proposed strategy proved to be significantly better in reframe time, stability and hardware implementation.

• 대한전자공학회논문지
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• 제24권2호
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• pp.183-189
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• 1987

The performance of frame synchronization can be represented by the values of three characteristic variables-average misframe interval, average syncloss detection time, average reframe time. In this paper, we have analyzed the performance of frame synchronization of the standardized 90Mb/s optical transmission system by Markov chain method, with the suggestion of an extended algorithm for performance improvement. Maximum average reframe time of 1.18 ms can be obtained by the suggested algorithm, which is compared with that of 2.28 ms for the existing algorithm.

• 한국과학교육학회지
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• 제19권4호
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• pp.560-569
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• 1999

본 연구는 서울 시내 여자 중학교 2학년 2개 반 75명의 학생을 대상으로 '화학 변화와 원소' 단원에 대하여 4주간 12차시 동안 실시되었다. 학생들은 12차시의 수업 처치 중 총 1,108개의 질문을 서면으로 적어 내었으며, 모든 질문은 6개의 범주로 분류되었다. 분석 결과, 학습 내용과 직접 관련이 없는 '무관련' 수준의 질문은 7%, 질문 자체의 명제가 성립되지 않는 '모순' 수준의 질문은 3%였다. 교수 내용에 대한 반복 설명을 요구하는 '회상' 수준의 질문은 전체의 23%를 차지하였으며, 사례 제시를 요구하거나, 학습내용의 단순 적용, 용어 등에 대한 추가 설명을 요구하는 '재구성' 수준의 질문이 전체의 40% 를 차지해 가장 높은 비율을 나타냈다. 또한 학습 내용에 대한 응용 및 적용, 자신의 생각과의 이견 등을 나타낸 '적용' 수준의 질문은 18%, 상위 개념이나 타 개념등의 확장된 개념적 질문을 포함하는 '확장' 수준의 질문은 전체의 9%를 차지하였다. 본 연구에서는 학생 질문의 유형별 특성에 대한 교육적 함의에 대해 논의하였다.

• 대한수학회논문집
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• 제20권4호
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• pp.685-693
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• 2005

An aperiodic perfect map(APM) is an array with the property that every array of certain size, called a window, arises exactly once as a contiguous subarray in the array. In this article, we deal with the generalization of APM in higher dimensional arrays. First, we reframe all known definitions onto the generalized n-dimensional arrays. Next, some elementary known results on arrays are generalized to propositions on n-dimensional arrays. Finally, with some devised integer representations, two constructions of infinite family of n-dimensional APMs are generalized from known 2-dimensional constructions in [7].

• ETRI Journal
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• 제9권2호
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• pp.36-47
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• 1987

We have developed three types of muldexes; they are 140Mbit/s muldex, 565Mbit/s muldex and monitor & control muldex for a 565Mbit/s optical fiber transmission system. The frame format of our own type has been constructed for the M&C muldex, and new direct and parallel reframe techniques have been invented for 140Mbit/s, and 565Mbit/s muldex. Their functions, configurations and perform ance evaluations are described here.

• 농업과학연구
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• 제24권1호
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• pp.108-120
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• 1997

Since domestic and international environments has changed rapidly, Korean primary agricultural coopratives are expected to face many difficulties in business management, especially marketing and banking business. Therefore, it is necessary to reframe the exitsting structure of primary agricultural cooperatives so as to enhance the competitiveness in terms of management efficiency. However, There are many problems to be solved such as overnumbered staffs compared with decreasing number of farming population, unbalanced ratio between executive officials and lower-level officials, complexity of position-ranking system resulting from unclearness of official title and office regulations, and management right excessively concentrated on cooperative leader. The suggested measures for such problems are as follows; 1) attaining the economy size of agricultural cooperaitves in line with decreasing rural community, 2) fostering the on-the job training programs and the personnel administration according to job competency, 3) merging the small primary cooperatives into larger units with efficiency, 4) specializing the cooperative business based on their regional comparative advantage, 5) maintaining the rational adjustment between elected cooperative leader's management right and responsibility.

• International Journal of Human Ecology
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• 제9권2호
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• pp.29-43
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• 2008

This study explores a model that examines how multidimensional risk factors explain mental health problems of young offenders. One hundred and ninety six students aged 13 to 15 in correctional facilities were assessed for mental health symptoms that examined the effects of multifaceted risk factors on mental health conditions. Consistent with the hypothesis of this study, secure unit students appear to have experienced various forms of risk factors and those factors have influenced mental health conditions. Results show that correctional facilities should reframe therapeutic and preventive approaches to disadvantaged students and develop integrated services and programs for rehabilitation and reintegration into society. It is recommended that those involved in treatment plans in correctional facilities consider that different treatment plans are necessary for each young offender.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1988년도 전기.전자공학 학술대회 논문집
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• pp.472-476
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• 1988

As to the development of the information society, the common communication network which processes the service for data, image and voice etc., is required. So the higher degree of reliability becomes more important. Therefore, this paper describes the improvement of reliability using the format transformation of the mBIZ code and the reframe usually practiced at the terminal repeater.

• 한국해양학회지:바다
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• 제9권4호
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• pp.173-178
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• 2004

최근 10여년 동안 적지 않은 경제적 손실을 가져온 만성적인 남해안 Cochlodinium 이상 증식의 발생 메커니즘과 구제 방안에 대해 물질보존과 수리생태학적 관점에서 사고실험을 시도 하였다. 그 동안 과학적인 해석의 대상에서 빠져 있었던 몇 가지 현장 정황에 대한 해석과 식물플랑크톤의 보존식에 대한 논의를 통하여 적어도 지금까지 통설로 여건왔던 것과는 다른 해석이 가능하였다. 부영양화 유발 주장의 과학적 근거는 취약한 것으로 판단되었고, 목표 생물을 박멸하는데 기초한 구제 방안은 환경친화적인 경쟁 부양으로 대체하는 것이 이론적 관점에서 바람직한 것으로 드러났다. 적조 발생 메커니즘에 대해서는 수렴-부상-결집 가설을 제시하고자 한다

• 보건교육건강증진학회지
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• 제28권2호
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• pp.109-123
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• 2011

Objectives: The purpose of the present study was to explore the relationships between views on suicide, death, and life and lifetime suicidal attempts in the Korean context. Methods: Multiple logistic regression model was tested using data from Korean General Social Survey of 2009. We utilized the nationally representative survey data obtained via multistage stratified area probability sampling design from 1,599 respondents aged ${\geq}18$ years. Results: The proportion of lifetime suicidal attempts was 12.1% of entire sample in Korea. Some components of views on suicide and death influenced significantly on lifetime suicidal attempts after adjusting for demographic and health-related factors. The positive view on suicide(OR=0.76, 95% CI: 0.62-0.94), the naturalistic view on afterlife(OR=0.37, 95% CI: 0.67-0.99) and death concern(OR=0.67, 95% CI: 0.55-0.83) were risk factors of lifetime suicidal attempts. In contrast, the social responsibility view on suicide(OR=1.17, 95% CI: 1.00-1.37) and the transcendental view on afterlife(OR=1.25, 95% CI: 1.02-1.54) lowered the risk. Conclusions: Practical implications of the findings were discussed exploring policy evidences to screen high risk groups out and to reframe educational programs for suicide prevention. Strategic health messages need to be developed and transmitted for prevention of suicide.