탄성 및 비탄성좌굴 고유치해석법을 이용하여 강절프레임의 보-기둥부재의 유효좌굴길이를 산정하는 개선된 방법을 제시한다. 이를 위하여 먼저 설계기준에 제시된 압축재의 내하력 곡선식으로부터 접선계수이론(tangent modulus theory)에 근거하여 세장비-접선계수(tangent modulus), 응력-변형률 곡선식을 유도한다. 이때 안정함수를 이용하여 보-기둥요소의 접선강성행렬을 얻고, 비탄성 좌굴 고유치해석법을 제시하며 이를 이용하여 유효좌굴길이를 산정하는 방법을 제시한다. 해석예제를 통하여 강절프레임에 탄성 및 비탄성좌굴해석법에 의한 유효좌굴길이 비교결과를 제시하고, 매개변수 연구 결과를 제시한다.

In order to enhance the effectiveness of students' learning behavior through teaching, it is necessary to investigate the differences between competent and less competent teachers' teaching practices. Furthermore, it is also important to examine various w

The purpose of these study was to find out the effect of sports counselling program for a juvenile delinquent students. So, on the subject of three advises, we studied on detailed fields including mental stability, responsibility, prudence, self-esteem, v

KEPCO has expanded electrical facilities to the largest scale to cope with electrical demand that over 10% increases per annum during last four decades, and marked herself in the world as an advanced power company by recently opening a new era of 765kV transmission system, the first among East nations to do so. Particulary, KEPCO has a big global competitive edge in accumulated knowhow and also with highly experienced specialists groups in every field. KEPCO is taking advantage of it's experience and has been knocking on the door of the overseas market since 1993. Success could be seen in the power generator in Philippines and other nations, and also the accomplishment of the successful first project of transmission part, Myanmar Power System Analysis. Based on that, KEPCO developed the second stage of the Myanmar project, Basic Designs for the 500kV Transmission System in Myanmar, and commenced it in January 2004. KEPCO would like to take this opportunity to find business advance strategies which coincide with the special quality of the transmission field, and not only techno-service businesses but also find a way out of transmission business field, which is already facing a slow down, by cultivating oveseas markets of huge constructing business with domestic companies. In connection with that, this paper is trying to find a cooperation system between KEPCO and domestic companies, and an effective project management method.

유자추출물 및 유자주스와 유자주스의 유기산, ascorbate 및 pheolic 획분을 이용하여 nitrosamine(NA)생성의 주요 전구물질인 아질산염의 소거능과 N-nitrosodimethylamine(NDMA)의 생성에 미치는 영향을 분석하였다. pH 1.2와 4.2의 반응계에서 아질산염 소거능과 NDMA 생성억제능은 시료 첨가량이 증가함에 따라 반응계의 pH가 산성영역일수록 더 높은 활성을 보였다. 유자 과육 및 과피추출물을 첨가한 경우 아질산염 소거능 및 NDMA 생성억제능은 과피추출물에서 다소 높은 활성을 보였다. 유자주스와 각 획분의 아질산염 소거능은 pH 1.2에서 주스를 첨가한 경우에 92.2±3.2~98.2±3.4%로 가장 높았으며, 다음으로 유기산 획분, phenolic 획분 및 ascorbate 획분의 순으로 나타났다 유자로부터 NDMA생성억제에 주된 영향을 주는 물질은 유기산인 것으로 생각된다.

백두대간은 한반도의 근간 축을 이루며 한민족의 상징성을 지닌 지역으로 총 연장 약 1,600km. 해발 100m부터 2,750m로 1대간, 1정간, 13정맥으로 이루어져 있으며 백두대간은 산자분수령의 기본 개념에 따라 우리 땅의 골간을 이루는 한반도의 중심 산줄기이다. 또한 남과 북이 하나의 대간으로 형성되어 있다는 상징적인 지리인식체계에 바탕을 두고 있다. 백두대간의 생태계는 우리나라 생물 다양성을 대표하는 자연환경 지역으로서 자원보전적 가치와 함께 입지 및 자원특성에 기인한 다양한 자원이용 환경도 존재한다. (중략)

The purpose of this study is to investigate an effective way of using real-time computer-mediated communication (CMC) tools for the development of Korean EFL learners’ oral communicative competence. The subjects of the study are the 53 first-year female university students and they are randomly assigned into three groups: text-, voice-, and video-chatting groups. The major results of the study are as follows: first, all the three synchronous CMC tools are effective in improving the fluency and accuracy of speaking skills. Second, the voice-based CMC tools, not the text-based one, are effective in improving the learners’ interactive skills and active use of communicative strategies. Third, all the three synchronous CMC tools are effective in enhancing the learners’ confidence in their English speaking abilities and beliefs in the improvement of their oral communicative competence. Lastly, the learners’ responses to the use of the CMC tools in performing communicative tasks are very positive in all the three groups. Based on these results, some pedagogical suggestions are made on the effective use of the synchronous CMC tools in Korean English classroom settings.

With a high-industrialized society and proliferating of nuclear family system, our society has been experiencing a breakdown of public morals and the values relevant to traditional family system. In addition, crimes have been increasing in number. It is believed that a rapid economic growth and the actualization of information-oriented society are a shortcut to the welfare state. However, we are facing its side-effects and an expansion of discontent of the underprivileged. In the rapidly changing society, criminals' ages are becoming lower and especially offenders who are in middle age are increasing. Moreover, the released prisoners are convicted of another crime. Therefore, the criminal policy focuses on the crime prevention and rehabilitation of offenders. Since the later 19th century, the study on re-offender and their rehabilitation have been conducted. The vicious circle of crime proves that correction and the social protection policy for released prisoners may be ineffective. The recent trends for prevention of re-offending is going from the institutional detention to community treatment, which is the development of the probation system. The national probation system is very important to protect the released prisoners. It is natural that the rehabilitation system is a fundamental of criminal policy and a special deterrence against recidivism in crime prevention system. In addition, it is settled down as the most traditional social protection step of community treatment. The first purpose of this study is creation of sound social climate through the prevention of reconviction by released prisoners and seeking for the role of the rehabilitation system in order to give effective supports to them. The second purpose is to examine the relationship between prevention of re-offending and rehabilitation system in details, and to investigate the realities and problems of rehabilitation for released prisoners. The final purpose is to find a way to revitalize rehabilitation system by analyzing critically the directions and programs of the Korea Rehabilitation Agencies.

Probation system is characteristic of managing criminals in the community. For this reason, protection them from consecutive offenses is directly related to the function of national security. Accordingly, strengthening function of probation system that supplemented with more information on criminals and treatment techniques can contribute to reduction not only security related personnel but also national budget. However, even though work load of probation is rapidly increasing as the importance of the community treatment is gaining social concern, shortage of personnels in charge of probation is deteriorating specialization of probation and organizational efficiency. To improve this situation and bring specialization of probation, increasing manpower of probation and reforming organization to be regulated mainly by probation officers themselves are needed. In addition, cooperation with the related agencies can also contribute to crime prevention in local community.

In general, data mining has iterative processes with the following five steps: Data Selection, Cleansing, Transformation, Mining, Interpretation. Among these steps, steps of data selection and cleansing are performed to classify data. There are two types of data, continuous data and discrete data. Discrete data has a classified structure and it is easy to obtain rules from data. However, there are no general rules for classified method of data in continuous data. So, the result of data analysis will be differed from the classified method of data in continuous data. This research presents a methodology that can obtain the rules from data and classify data according to situations in DBMS (Data Base Management Systems).

The purpose of this research was to investigate the relationships between the socioeconomic condition, health attitude and the eye health of the elderly. Thereupon, this study is attributed to promote the eye health of the elderly. Data were collected through questionnaire by one-to-one interview in a community. The content of original questionnaires were revised by literature review and the pilot study. The sample was consisted of 285 elderly with a mean age of 71.8 years. In the study group, female was 52.3% and male was 47.7%, respectively. In age group, over 80 years was 16.5%, 75-79 was 21.0%, 70-74 was 29.5%, 65-69 was 26.0% and 60-64 was 7.0%. In maritai status, married and living with spouse was 54.4%, widowed was 45.6%. The elderly were suffering with diseases of arthritis(33.3%), hypertension(20.1%), cataract(14.2%) and diabetes(9.7%), respectively. Socioeconomics conditions were measured with monthly allowance money : The upper group those who can spend over 310,000 won was 13.6%, 110,000-300,000 won was 34.0%, less than 100,000 won was 52.5%, respectively. Therefore, the person who were very active health practice group were correlated positively with the wealthier group. Of the total, 33.2% of the elderly answered, they are suffering from two kinds of diseases combined at the same time. For the elderly who have the more concem on eye health were positively correlated with the higher educational level, live with spouse, and the ones who can spend the more monthly allowances. Eye health concem is positively correlated to health attitude.