• 한국강구조학회 논문집
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• 제12권4호통권47호
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• pp.397-406
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• 2000

본 연구는 수평하중을 받는 고층철골가새골조의 횡변위를 정량적으로 제어하는 효율적인 최적화 기법을 제시한다. 이를 위해 철골가새골조의 거동특성에 근거한 변위 민감도를 구성하고 수학적계획법의 일반성을 유지하면서 규모가 큰 문제도 효율적으로 다를 수 있는 근사화 개념이 도입된다. 아울러 단면 재선정시 상용화된 표준철골단면을 이용하는 이산형 최적화 방안도 고려한다. 제시된 기법의 효율성을 검토하기 위해 세 가지 종류의 12층 철골가새골조와 30층의 가새보강된 철골조 모델이 고려된다.

• 정보관리연구
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• 제42권3호
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• pp.95-116
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• 2011

이 연구에서는 국립중앙도서관이 구축 운영하는 웹 아카이브인 OASIS 콘텐츠의 특성과 문제점을 살펴보았다. 2011년 5월 20일부터 6월 10일 사이 OASIS 웹사이트를 통해 제공되는 주제별 디렉토리에서 철학, 종교 등 5개 주제와 사회과학과 기술과학 소주제의 수집 웹사이트 55종 및 '최신 자료'와 '많이 본 자료' 리스트를 분석하였다. OASIS는 수집 콘텐츠의 주제 분포의 편중, 웹사이트 저작자/발행자 권위 및 학술적 가치의 근거 미약, 아카이빙 대상의 정의 부적합, 수집 및 이용 통계 처리의 모호성 등 문제점이 나타났고, 이에 대한 포괄적이며 체계적인 개선책 마련이 시급한 상황이다.

• 대한가정학회지
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• 제30권1호
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• pp.11-24
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• 1992

The purpose of this study is to investigate the present states and preferences for a type of campus wear, the differences between the life-style variables and clothing behavior among school uniform students and non-uniform students, to explore variabels of the purchasing tendency in clothes of boys' and girls' high school students. The questionnaires were administered to samples of four boys' and girls' high schools respectively in Kwangju. The data from 522 respondants were analyzed in using Frequency and T-test. The results were as follows: 1. Most of schools are likely to take a school uniform system in the near future but students do not have favorable attitude against the system. 2. There were partly significant differences between the clothing behavior variables (boys : psychological dependence, comfort and atmosphere of the store, girls : downtown shopping) among school uniform students and non-uniform students. 3. There were partly significant differences between life-style variables(boys : leadership and social attitude, advertisement confidence, girls : price consciousness) among school uniform students and non-uniform students. 4. About 80% of the subject group planned their clothing purchase in advance, and their parents and friends influenced on clothing buying behaviors more then other fashion information sources, however, for the boy students the atmosphere of the store is most affecting variables. The store in which the subject group purchased clothing most frequently was a specialty fashion store. In clothing selection, aesthetic factors were showen as important factor and the most affecting mass media is TV.

• 한국지능시스템학회논문지
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• 제22권6호
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• pp.793-798
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• 2012

In this paper, we explored the new method for extracting feature from the electroencephalography (EEG) signal based on linear regression technique with the orthonormal polynomial bases. At first, EEG signals from electrodes around motor cortex were selected and were filtered in both spatial and temporal filter using band pass filter for alpha and beta rhymic band which considered related to the synchronization and desynchonization of firing neurons population during motor imagery task. Signal from epoch length 1s were fitted into linear regression with Legendre polynomials bases and extract the linear regression weight as final features. We compared our feature to the state of art feature, power band feature in binary classification using support vector machine (SVM) with 5-fold cross validations for comparing the classification accuracy. The result showed that our proposed method improved the classification accuracy 5.44% in average of all subject over power band features in individual subject study and 84.5% of classification accuracy with forward feature selection improvement.

• 한국치위생학회지
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• 제21권5호
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• pp.639-644
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• 2021

Objectives: The purpose of this study was to analyze the factors that affected the number of citations for articles published in the Journal of Korean Society of Dental Hygiene based on previous studies. Methods: Information on papers including the number of citations was collected using a web crawling technique. The effect of the number of author keywords, the number of Medical Subject Headings (MeSH) keywords, MeSH match rate, abstract word count and keyword-abstract ratio on the number of citations was analyzed by multiple regression analysis. Results: The use of the MeSH keyword did not have a significant effect on the number of citations. Among the other factors, only the keyword-abstract ratio was statistically significant. Conclusions: Select a topic of constant interest in the field, write the title in detail using colons or asterisks if necessary, and do not repeat the words used in the title in keywords. Select specific keywords deeply related to the topic. In particular, choice words or phrases that are frequently used in the abstract. If the MeSH keyword selection contradicts the previous strategies, boldly give up the MeSH keyword.

• 한국과학예술포럼
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• 제37권3호
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• pp.125-134
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• 2019

본 연구는 영상콘텐츠 제작과정에서 배경음악 선정의 자동화를 위하여 영상의 특성을 분류, 분석할 수 있는 프로그램을 구성하였다. 연구 결과 및 내용은 다음과 같다. 영상의 특성은 '주제 범주', '감정', '픽셀 움직임 속도', '색상', '등장인물' 로 선정하며, '주제 범주'와 '감정'은 Microsoft사의 Azure Video Indexer를, '픽셀 움직임 속도'는 Optical flow, '색상'은 Image Histogram, '등장인물'은 CNN (Convolutional Neural Network)을 활용하여 데이터를 추출하였다. 이러한 본 연구의 결과는 최근 주목을 받고있는 '인터넷 1인 방송 크리에이터'들의 콘텐츠 제작과정에서 배경음악 매칭을 위한 영상 특성 분석이 이루어졌다는 점에서 의의가 있다.

• Communications for Statistical Applications and Methods
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• 제29권1호
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• pp.65-83
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• 2022

Although various statistical methods have been developed to map time-dependent genetic factors, most identified genetic variants can explain only a small portion of the estimated genetic variation in longitudinal traits. Gene-gene and gene-time/environment interactions are known to be important putative sources of the missing heritability. However, mapping epistatic gene-gene interactions is extremely difficult due to the very large parameter spaces for models containing such interactions. In this paper, we develop a Gaussian process (GP) based nonparametric Bayesian variable selection method for longitudinal data. It maps multiple genetic markers without restricting to pairwise interactions. Rather than modeling each main and interaction term explicitly, the GP model measures the importance of each marker, regardless of whether it is mostly due to a main effect or some interaction effect(s), via an unspecified function. To improve the flexibility of the GP model, we propose a novel grid-based method for the within-subject dependence structure. The proposed method can accurately approximate complex covariance structures. The dimension of the covariance matrix depends only on the number of fixed grid points although each subject may have different numbers of measurements at different time points. The deviance information criterion (DIC) and the Bayesian predictive information criterion (BPIC) are proposed for selecting an optimal number of grid points. To efficiently draw posterior samples, we combine a hybrid Monte Carlo method with a partially collapsed Gibbs (PCG) sampler. We apply the proposed GP model to a mouse dataset on age-related body weight.

• 한국비블리아학회지
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• 제20권4호
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• pp.31-49
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• 2009

국내의 권장목록은 최근 독서교육의 중요성 인식, 학교도서관 및 어린이도서관의 증가에 힘입어 다양한 형태로 발전하여, 30여개 기관에서 발간하고 있다. 기존의 연구가 권장목록을 선정도구로서의 관점에서 평가한 것과는 달리 본 연구는 17개 인지도 있는 목록 발행기관을 선정하여 배포하는 권장목록의 최근 경향을 역사, 개발기관, 유형, 배포형태, 전문화, 통합검색, 사서의 참여, 서지정보, 주제구분, 이용자구분의 10가지 면에서 살피고, 풍부한 정보원으로서의 가치를 제시하였다. 이제는 권위 있는 어린이정보 관리기관에서 통합적 정보제공을 하여야 할 시점에 있다.

• 대한치과기공학회지
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• 제34권3호
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• pp.263-271
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• 2012

Purpose: The purpose of this research was to examine department satisfaction for improving the competitiveness of department of dental technology and providing basic data for students successful guidance. Methods: The study subject were 560 students from 4 colleges, and they were selected by the convenient sampling method. Data for this survey was obtain by self-administration method. This questionnaire consist of general characteristics, the awareness of before entering department of dental technology, the satisfaction of department of dental technology, an opinion about change of one's course and temporary absence. Results: About the time of selecting their major, 70.1% of students answered the most before highschool. Department of dental technology and the most common source of information in selecting a majors is the person oneself(52.6%). The person who answers because of knowing a little bit for the question asking the priori knowledge of department of dental technology showed up as 66.3%. About the motivation for selection their major, 37.4% of students answered the most it seemed to be a future prospect. As to the extend of department satisfaction, the satisfaction showed up as 63.3%, but the extend of satisfaction was exposed to reduce as the grade increased. The dissatisfaction factor is the difficulty of the theory(29.8%). Many students do not want to change their majors even if they are provided with the chance to do so(68.7%). From the survey related to the experience of thinking over temporary absence and drop out, 56.8% of students responded they had experienced thinking about that. Current feelings after department selection was found to be the most significant factor that affects satisfaction of department of dental technology(Adjusted $R^2$=48.3%). Conclusion: The extend of satisfaction of the women is low. The extend of satisfaction reduces as the grade increases. The school subject extend of satisfaction can know that ratio about of considering the leave of absence and voluntary withdrawal increases. Therefore, the plan of education that women can adapt the women o the school subject well and that it can be satisfied is sought for. It is considered that effort promoting the extend of satisfaction is needed as the grade increases.

• 한국지역지리학회지
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• 제4권1호
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• pp.121-134
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• 1998

본 연구에서는 위성영상과 GIS를 이용하여 금호강유역(琴湖江流城)의 유역특성인자(流域特性因子) 주제별로 데이터베이스화하여 수문특성자료(水文特性資料)를 산출하였다. 토지에 대한 정량적인 정보를 제공해 주는 위성영상(衛星映像)처리를 통한 토지이용도 작성은 금호강유역(琴湖江流城)과 같이 광범위한 유역(流域)의 토지이용자료를 분석하는데 매우 효율적이며, 또한 대량의 지표자료의 정확한 분석이 가능하고 이를 다른 주제도와 중첩함으로써 공간적인 주제간의 통계적 연산의 가능성을 확인할 수 있었다. 또한 GIS를 이용한 유역특성인자(流域特性因子)의 분석은, 기본도에서 주제별로 tracing하는 과정은 효과적이지 못하나, 일단 수치화 하여 데이터베이스화하면 상이한 주제도와의 중첩분석과 속성자료와의 상관분석이 가능하므로, 유역(流域)관리와 유역(流域)의 지표공간 분석에 매우 효율적으로 이용될 수 있을 것으로 사료된다. 특히 지표면 변화에 대한 자료의 수정 및 갱신이 용이하며 유역(流域)에 대한 인문사회 속성자료와의 상관분석으로 보다 신속하고 정확한 유역특성자료(流城特性資料)의 추출 및 보다 효율적인 유역(流城)관리 방안을 구축할 수 있을 것이다.