• 정보화정책
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• 제21권4호
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• pp.81-97
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• 2014

본 연구는 정보통신 기기 및 관련 서비스에 대한 소비자들의 구매행태를 분석하고, 다양한 정보통신 기기 및 서비스 간의 상관관계를 파악하고자 한다. 본 연구는 다양한 제품과 서비스의 다중선택 상황을 동시에 고려함으로써, 각 제품 및 서비스 그룹 내의 상관관계뿐만 아니라 그룹 간의 상관관계도 추가적으로 살펴보고자 한다. 분석자료는 소비자 설문조사를 통해 수집하였으며, 인구통계학 변수를 고려한 다변량 프로빗 모형(Multivariate Probit Model)과 분산-공분산 행렬(Variance-covariance Matrix)을 분석하기 위한 대안상수 모형(Alternative Specific Constant Model)을 각각 추정하였다. 또한 다차원척도 분석(Multi-dimensional Scaling Method)을 이용하여 제품 및 서비스 간의 관계도를 도식화하였으며, 다양한 정보통신 기기 및 서비스 간의 대체 또는 보완 관계를 도출하였다. 본 연구는 소비자들의 구매행태를 이해하고 예측함으로써 신제품과 서비스의 개발에 유용한 정보를 제공할 것으로 기대된다.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 2002년도 춘계 학술발표회 논문집
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• pp.75-82
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• 2002

Shaking table model tests are performed to reproduce the dynamic behavior of a gravity quay wall and a pile-supported wharf damaged by Kobe earthquake in 1995. Using the scaling relations suggested by Scott and Iai(1989), the results of the model tests are compared with field measurements as well as with those of the model tests previously executed. The displacements of the gravity quay wall predicted by the current model tests are, at most, one third of the measured displacements, while the displacements of the model pile-supported wharf are about two thirds of the measured values. One possibility for the discrepancy is speculated to be the use of too big scaling factor, i.e., too small size of model.

• 한국실내디자인학회논문집
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• 제1호
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• pp.52-55
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• 1992

The purpose of this study was to suggest the spatial structure among residential behaviors in relation to work space. To find the structure, Multi-Dimensional Scaling analysis was used. Respondents were 349 middle income housewives living in apartments in the area of Caopital region. Data were collected through the questinnaire survey. For the future residential interior design, following points were sugtested. A laundary space neess to be developed independently , being separated from both bathroom and kitchen/dining space. A new area which will give housewives some territoriality and also function as home office needs to be considered. A space configuration which satisfies the organic relationships among laundary behaviors such as washing dying, ironing and folding , needs to be systematically planned, with two adjoining separate zones of wet and dry utility . The present bathroom nees to be more incorporated to the private bedroom rather than to workspace.

• 한국치위생학회지
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• 제15권6호
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• pp.999-1007
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• 2015

Objectives: The objective of the study is to investigate oral health behavior and oral health education experience in Korean adolescents from the ninth(2013) web-based survey of Korean youth risk behavior. Methods: The subjects were 72,435 students through the ninth 2013 web-based survey of Korean youth risk behavior conducted by the Ministry of Education, Science, and Technology, the Ministry of Health and Welfare, and the Korea Centers for Disease Control. The questionnaire consisted of socio-demographical characteristics of the subjects, oral health behavior, and oral health education experience. Data were analyzed by SPSS 18.0 program. Results: Oral health education had much influence on tooth brushing after lunch, oral cavity disease prevention, sealants, fluoride application, scaling experience, and consumption of vegetables, milk, carbonated soft drinks, noodles, and snacks. The oral health education had a great impact on those who took good oral health behavior into action. Conclusions: It is very important and necessary to develop the continuing effective oral health education program for the adolescents and make them tale into action.

• 한국치위생학회지
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• 제12권2호
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• pp.275-284
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• 2012

Objectives : The purpose of this study was to examine the oral health behavior of shipbuilding company workers in some regions in a bid to provide information on the oral health plans for industrial fields. Methods : The subjects in this study were 310 workers in 10 shipbuilding companies and suppliers in Jeolla Namdo Province, on whom a self-administered survey was conducted. Results : 1. Concerning general information about the subjects who participated in the research, gender was possessed 94.8% by men and 5.2% by women. Age was the largest in 31~40 years old with 44.2%. Marital status was the largest in the married with 64.5%. It was the largest in under high school graduate with 71.9% for academic background, in 2,000,000 won~3,000,000 won with 49.0% for monthly family income, and in cooking with 33.9% for work field. 2. Research subjects' toothbrushing time was indicated to be the largest in after having breakfast. It was indicated to be twice a day with 41.3% for toothbrushing frequency. 90.3% of the respondents are not using auxiliary oral hygiene devices. 3. Recognition on periodontal health status was found larger in workers whose response was that their own periodontal health status is 'healthy' than workers who responded that their status is 'not healthy.' Workers, who don't have subjective symptom on periodontal status, were indicated to be larger. 4. Ratio of subjects with tooth scaling experience accounted for 59.7%. The ratio of tooth scaling experience was indicated to be different depending on academic background and monthly family income. Conclusions : Academic credential, monthly family income and the line of work were identified as the main factors to affect oral health care of the shipbuilding workers. Oral health education and dynamic implementation of corporate oral health promotion which are designed to meet the needs of workers are required.

• 대한치과기공학회지
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• 제35권4호
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• pp.395-403
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• 2013

Purpose: This article examined the affecting factors of a malocclusion status of a patient for orthodontic treatment, orthodontics medical expenses and oral health behavior on orthodontic satisfaction. Methods: This paper conducted a survey from the 15th of July to 30th of September 2012 for the patients who were under orthodontic treatment at three dental clinics where are in Deagu, and distributed a total of 210 questionnaires and analyzed 194 questionnaires, excepting for some questionnaires that were answered unfaithfully. Results: This study classified the related factors into a feeling of satisfaction with treatment and mental satisfaction for finding orthodontic satisfaction. There were the effect of the right tooth-brushing method, a periodic scaling and orthodontics medical expenses on a feeling of satisfaction with treatment, and power of explanation was 16.7%. Conclusion: There were the effect of a malocclusion status, matters that requires attention during orthodontic treatment, a periodic scaling during orthodontic treatment and orthodontics medical expenses on mental satisfaction, and power of explanation was 16.9%. Based on the result above, this paper concluded that preventive treatment and early treatment should be emphasized through developing a program for regular oral examination suited to each medical type, including the method for improving the medical treatment condition and care service for increasing orthodontic satisfaction, which the dental medical-service providers could consider the patients and secure trust.

• 한국학교ㆍ지역보건교육학회지
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• 제19권2호
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• pp.53-63
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• 2018

Objectives: This study was intended to provide resources for the development and operation of the elderly's oral health education programs by comparing the difference of oral health behavior, oral health care self-efficacy and oral health levels according to their oral health education experiences and by researching the correlation of oral Health Behavior, self-efficacy, subjective oral health level and oral health education experience. Methods: An interview survey using structured questionaries was done on 180 senior citizens older than 65 years old residing in some areas of Gyeonggi-do from April 19 to May 25, 2018. The data was analyzed with Chi-square, t-test, spearman correlation coefficient with the use of SPSS 20.0. Results: 1. Those who are older than 75 years old and have higher levels of education and finance have more experiences of oral health education. 2. Those who have experiences of oral health education brush their teeth more than three times a day, use more oral health care items and get more regular preventive treatments such as oral examination and scaling. 3. As they has experiences of oral health education, their oral health behaviors, oral health care self-efficacy(tooth care, dietary control, regular checkup) and subjective oral health levels are high. Conclusion: It is necessary to try to improve the elderly's oral health levels by motivating the importance of oral health care and changing their oral health behaviors positively with the implement of oral health education on the elderly. Especially, oral health education programs that are operated on the elderly should be planned with practical programs that can cause the change of their oral health behaviors and should be processed to reinforce oral health care self-efficacy. Furthermore, preventive treatments for the elderly such as oral health education, oral examination and scaling should be implemented systematically and continuously by policy.

• 한국치위생학회지
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• 제15권5호
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• pp.813-821
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• 2015

Objectives: The purpose of the study was to investigate the relationship between health behavior and oral symptoms in Korean adolescents. Methods: The subjects were 72,060 adolescents who were selected from the web-based survey of the 10th (2014) Korean Youth Risk Behavior of Korean Center for Disease Control. Data were analyzed by PASW statistics 18.0. A web-based self-reported questionnaire was completed by 74,167 middle and high school students. The subjects consisted of 36,470 boy students (52.2%) and 35,590 girl students (47.8%) from 400 middle schools and 400 high schools. Results: Multiple logistic regression analysis revealed that experience of oral symptoms were related with sex, age, academic achievement, economic status, alcohol drinking, moderate physical activity, muscular strength exercises, walking, fruit consumption, milk consumption, fast food consumption, snack consumption, daily tooth brushing frequency, use of fluoride toothpaste, school based oral health education, dental sealant and dental scaling. Conclusions: There were close relationship between heath behavior, oral health behavior, and experience of oral symptoms. To improve the health promotion for the adolescents, oral health program development and primary prevention strategy must be established.

• 지질공학
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• 제32권3호
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• pp.377-388
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• 2022

최근, 다수의 연구가 지수적으로 증가하는 지진 자료를 효율적이고 정확하게 처리하기 위해 기계학습을 활용하고 있다. 본 연구는 지진의 발생 시간, 위치, 규모의 정보를 확장하여 기계학습에 적용 가능한 자료를 제작한 후, 주성분 분석을 통해 추출한 자료의 주요 성분으로 자료의 차원을 축소하였다. 차원이 확장된 자료는 36,699개의 지진 사건을 포함하는 Global Centroid Moment Tensor 카탈로그로부터 얻은 지진 정보의 통계량으로 구성되었다. 표준화와 최대-최소화 스케일링을 활용하여 자료 전처리를 수행하였으며, 스케일링이 완료된 자료에 주성분 분석을 적용하여 자료의 주요 특징을 추출하였다. 스케일링은 상이한 단위로 인한 특징 값의 차이를 현저히 감소시켰으며, 그 중 표준화는 다른 전처리에 비해서 각 특징의 중앙값을 더 균등하게 변환하였다. 주성분 분석이 스케일링이 적용되지 않은 자료로부터 추출한 여섯 개의 주성분은 원본 자료의 정보를 99% 설명하였다. 표준화와 최대-최소 스케일링이 적용된 자료로부터 추출한 열여섯 개의 주성분은 원본 자료의 정보의 98%를 재구성하였다. 이는 특징 값의 분포가 균등한 자료의 정보를 보존하기 위해서는 더 많은 주성분이 필요함을 지시한다. 본 연구는 지진 데이터와 지진 거동과의 관계를 분석하는 효율적이고 정확한 기계 학습 모형을 훈련시키기 위한 데이터 처리 방법을 제안하였다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1997년도 가을 학술발표회 논문집
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• pp.103-110
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• 1997

The objective of this study is to provide the information on the small-scale model mix proportion when the behavior of prototype concrete pavement is studied through small-scale model experiments. However it is difficult to obtain a model material to simulate the prototype concrete by scaling the individual components according to the laws of similitude. In this paper, the stress-strain behavior in uniaxial compression is used as a means to correlate materials similitude between the prototype and the model concrete. Based on th results of experiments, We compared the stress-strain curves of prototype and model concrete mixes using a nondimensional basis. In order to simulate the stress-strain curves of prototype concrete, it is important that various mix as of model concrete selected properly which are varied from aggregate grading, cement-aggregate and sand-aggregate ratio.