• 한국콘텐츠학회논문지
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• 제19권7호
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• pp.271-280
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• 2019

본 연구는 애착과 비행친구가 청소년비행 지속에 미치는 영향을 규명하기 위하여 한국아동 청소년 중1패널을 이용하여 분석한 결과는 다음과 같다. 첫째, 청소년비행은 중3 180명(10.2%)에서 고3 278명(15.7%)으로 1.5배 증가하였으며, 비행중단 138명(72.7%), 비행지속 42명(23.3%)으로 나타나서 중단보다 지속이 더 적으며, 고3시기에 비행경험이 236명(85.6%)으로 나타났다. 둘째, 애착과 비행친구가 청소년비행에 미치는 영향은 부모애착은 중3에서는 부모애정이 부(-)의 영향, 고3에서는 부모감독이 부(-)의 영향을 미치는 것으로 나타났다. 친구애착에서 또래신뢰는 중3에서, 비행친구는 중3과 고3에서 정(+)의 영향을 미치는 것으로 나타났다. 셋째, 청소년의 애착과 비행친구가 비행지속에 미치는 영향은 부모감독에서 부(-)의 영향을 미치며, 비행친구는 정(+)의 영향을 미치는 것으로 나타났다. 그러나 부모애정, 친구애착(교우, 신뢰)은 영향을 미치지 않는 것으로 나타났다. 이런 연구결과를 토대로 청소년복지 실천을 위한 제언을 기술하였다.

• 지역사회간호학회지
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• 제12권2호
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• pp.406-416
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• 2001

This study is performed to confirm the influencing factors of family health protection behaviors using the variables included in Pender's Family Promotion Model. 1. The subjects are 110 families in preschooler family developmental stage, respondents are children's mother or father. These families are almost all nuclear types(95%), function of families is healthy as much as 8.0 the mean FAPGAR score. The prevalence rate of family members' illness was 14.7% these last 3 months, and 21.1 % of families responded suffered from injury for last 2 years. 2. The practice rate of injury prevention behavior is below a half in supervision and modifying of their home and residential environments, especially controlling through collaborative community power. The more familiar function score is the better practicing rates of injury prevention behaviors. 3. The injury prevention behaviors correlate to family size, health status of family member, and children's congenital defects with statistical significance. Families' economic condition correlates also significantly to family health status, cognition of benefits of injury prevention, cognition of the importance of community collecting power. And the recognition of the benefits of injury prevention correlates the adaptive health concept, family norms about injury prevention, economic status. 4. Considering family health promotion model. the general influencing factor is only affected to family protective behavior, and other paths don't affect to family's behaviors. In simple regression, the family protective behavior model explains 27.8%(P=0.05), significant factors are family function status, family size, chronic illness of family members', mother's education level. father's age. 5. To define of familiar preventive behavior as a unit is very important, but it has the limitation to solve the difficulties of family studies going with the operationalized difficulties of health promotion concept.

• Steel and Composite Structures
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• 제27권2호
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• pp.185-192
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• 2018

Fly ash can significantly improve concrete workability and performance, and recycling fly ash in concrete can contribute to a cleaner environment. Since fly ash influences pozzolanic reactions in concrete, mechanical behaviors of concrete containing fly ash differ from traditional concrete. Creep behaviors of fly ash concrete filled steel tube arch were experimentally investigated for 10% and 30% fly ash replacement. The axes of two arches are designed as circular arc with 2.1 m computed span, 0.24 m arch rise, and their cross-sections are all in circular section. Time dependent deflection and strain of loading and mid-span steel tube were measured, and long term deflection of the model arch with 10% fly ash replacement was significantly larger than with 30% replacement. Considering the steel tube strain, compressive zone height, cross section curvature, and internal force borne by the steel tube, the compressive zone height and structural internal forces increased gradually over time due to concrete creep. Increased fly ash content resulted in more significant neutral axis shift. Mechanisms for internal force effects on neutral axis height were analyzed and verified experimentally.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년 학술대회 논문집 정보 및 제어부문
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• pp.223-225
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• 2006

A ball moving on a beam is a typical nonlnear dynamic system, which is often adopted to proof test diverse control schemes. Ball and plate system is the extension of the traditional ball and beam problem that moves a metal ball on a rigid plate. In this paper, a trajectory planning and tracking problem is proposed for ball and plate system, which is to control the ball from a point to another without hitting the obstacles. Our scheme is composed of three controllers, TS type optimal path tracking controller, mandani type obstacle avoidance controller and trajectory planning controller that determines the desired trajectory. But this type of construction can give rise to chattering executions. Because the difference of contributions from concurrent controllers can cause behaviors unsmoothly. We propose fuzzy pid supervision control1er to handle this problem.

• 한국사회복지학
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• 제42권
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• pp.83-106
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• 2000

The purpose of this study is to identify the common factors that affect adolescents, drinking and delinquency. Previous studies have supported that parenting is the most important variable to explain adolescents' drinking and delinquency. For study, 497 adolescents from middle schools and high schools in Inchon city, Korea, were recruited. Instrument for measurement consists of affective-tie and supervision regarding parenting, drinking, and delinquency. Stepwise multiple regression was used as a main statistical analysis. According to the results, even though there is some association between drinking and delinquency, this study found that the most strong predictable variable in explaining adolescents' drinking and delinquency is parenting. That is to say, effective parenting can contribute to prevent adolescents's drinking and delinquency. Therefore, this study suggests that social services and programs to support effective parenting should be provided.

• Communications for Statistical Applications and Methods
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• 제12권2호
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• pp.531-538
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• 2005

In k-means clustering, we standardize variables before clustering and iterate two steps: units allocation by Euclidean sense and centroids updating. In applications to DB marketing where clusters are to be used as customer segments with similar consumption behaviors, we frequently acquire additional variables on the customers or the units through marketing campaigns a posteriori. Hence we need to modify the clusters originally formed after each campaign. The aim of this study is to propose a revision method of k-means clusters, incorporating added information by weighting clustering variables. We illustrate the proposed method in an empirical case.

• 한국콘텐츠학회논문지
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• 제20권12호
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• pp.383-392
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• 2020

본 연구는 발달장애인 평생교육센터 성인 발달장애인의 도전적 행동 관련 현황 및 이와 관련한 종사자의 인식을 확인하고자 수행되었다. 이를 위해 서울시 소재 발달장애인 평생교육센터 16개 기관과 종사자를 대상으로 설문조사를, 4명의 센터장을 대상으로 초점집단인터뷰를 실시하였다. 주요 연구결과는 다음과 같다. 첫째 발달장애인 평생교육센터 종사자의 85.4%가 지난 1년 간 도전적 행동으로 인해 상해를 경험한 적이 있으며, 상해를 경험한 종사자는 소진, 심리적 트라우마, 이직을 고려한 적이 있다고 응답하였다. 둘째, 도전적 행동에 대한 기관의 사전대응은 '개별공간 확보', '도전적 행동 유발요인 사전파악'이 각각 87.5%로 가장 많았으며, 후속대응으로는 81.3%의 기관에서 해당 상황에 대한 사례회의 및 슈퍼비전을 진행한다고 응답하였다. 셋째 도전적 행동 대응과 관련한 제안사항으로, 기관차원의 시스템 구축, 유관기관과의 협력이 필요한 것으로 확인되었다.

• Child Health Nursing Research
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• 제21권2호
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• pp.107-114
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• 2015

Purpose: The purpose of this study was to explore the relationships among preschoolers' smartphone addiction tendency, problem behaviors, and parenting efficacy of the mothers of these children. Methods: A cross-sectional, descriptive study design was used with self-administered questionnaires. A total of 83 mothers of preschoolers aged 4-6 years and their preschool teachers from a kindergarten participated in the study. Results: Mean daily time spent by the preschoolers on smartphones was about 45 minutes/day. About 40% spent more than 60 minutes/day on smartphones. The majority (69.8%) used smartphones without adult supervision. The level of smartphone addiction tendency among the preschoolers was $1.52{\pm}0.45$ on a 4-point scale. Preschoolers whose mothers use smartphones for more than 60 minutes/day showed a higher level of smartphone addiction tendency than preschoolers whose mothers use smartphones for less than 60 minutes/day. Also smartphone addiction tendency among preschoolers had a positive correlation with hyperactive-distractible behavior (r=.228, p=.038) and a negative correlation with parenting efficacy of their mothers (r=-.299, p=.006). Conclusion: Our findings demonstrated that preschooler's smartphone addiction tendency is significantly associated with hyperactive-distractible behaviors of the children and low parenting efficacy among their mothers. Therefore well-designed care plans for these populations should be provided to decrease smartphone addiction tendency.

• 한국치위생학회지
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• 제6권4호
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• pp.455-467
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• 2006

Demand for appropriate health care has gradually increased in Korea. In addition, developments of community- and school-based oral health programs have also focused oral health care for the oral health promotion. Especially, school-based oral health programs are the underpinnings of promoting oral health and preventing oral diseases among schoolchildren. School-based oral health programs have had three major components: oral health education, oral health services, and a healthful environments. These included oral health education(one-to-one communication, group communication, and use of mass communication), oral examination, fluoride mouthrinsing, pit-and-fissure sealants, fluoride gel application, mechanical plaque control, and chewing xylitol candy. In this study, we evaluate the effects of oral health programs among primary schoolchildren by comparing the oral health knowledge, oral health behaviors, and perception of caries prevention procedures. Data for this study were obtained from 699 primary schoolchildren at the two primary school in Daegu, Korea. One is experimental group, N primary school, that was established school-based oral health center under supervision of Nam-gu Public Health Center, the other is control group, N' primary school, that was yet to establish school-based oral health center. We surveyed children's oral health knowledge and behaviors, and perception of caries prevention procedures using self-administrated questionnaire and then analyzed differences of each item among two groups. The brief findings of this study were summarized as follows. There are several advantage to a comprehensive school-based oral health program. (1) School-based oral health programs facilitate and increase the effectiveness of teaching oral health subjects. (2) Schoolchildren are available for prevention or treatment procedure. (3) School-based oral health center may be less threating than private dental clinic. (4) With comprehensive school-based oral health programs the decayed, missing, and filled teeth(DMFT) of schoolchildren should demonstrate a substantial and steady decrease over time(Choi et al, 2004). In conclusion, treatment is not the answer to solving children's oral health programs; rather primary prevention is the key. Many countries and communities are focusing on hoe millions of underprivileged children can be provided with health care. Schoolchildren gain the knowledge and behaviors to attain and maintain good oral health in schools. For these reasons, the role of school-based oral health center is not only important but also a necessity.

• 한국식생활문화학회지
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• 제27권6호
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• pp.646-658
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• 2012

This study was conducted to investigate the differences in households, parental perception, and dietary behaviors of preschool children from kindergartens with environment-friendly food service (environment-friendly food service group; EFG) versus children from kindergartens with general food service (general food service group; GFG). We sought this basic information to examine the impact of environment-friendly agricultural products in preschool food services. Age, education level, and monthly family income of the EFG were significantly higher than the GFG. The frequency of purchasing environment-friendly agricultural products was significantly higher in the EFG than the GFG, with the most frequently purchased items in both groups being vegetables. The GFG had a significantly higher perception than the EFG in the superior quality of environment-friendly agricultural products; however, a greater proportion of the GFG than the EFG thought environment-friendly products were too expensive. The most frequent reason for purchasing environment-friendly agricultural products in both groups was safety. When purchasing environment-friendly agricultural products, the most important selection factor for the majority of both groups was the label certifying quality assurance. Both groups also considered price reduction as essential for promoting environment-friendly agricultural products. In regard to parental perceptions on food service in kindergarten, the EFG had a significantly higher satisfaction with the nutritional adequacy of the menu compared to the GFG. Both groups considered food safety and health as primary reasons for using environment-friendly foods in the preschool food service, with a greater proportion of the EFG than the GFG responding this way. There were significant differences between the EFG and GFG, as the main satisfaction from using environment-friendly foods in the EFG was safety, freshness, and good hygiene, whereas the main satisfaction in the GFG was a good food service menu, freshness and good hygiene. Dietary behaviors of preschool children in the EFG were also significantly superior to the GFG. Thus, environment-friendly agricultural products have positive effects on the dietary behaviors of preschool children and should be increased in the preschool food service. Lowering prices and a strict supervision of quality assurance is also necessary to promote consumption of environment-friendly food materials.