• Transactions of the Korean Society of Mechanical Engineers A
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• v.36 no.11
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• pp.1413-1420
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• 2012

To predict the dynamics behavior, running stability, etc. of a railway vehicle and to understand its physical characteristics, analytical methods are used for the testing and manufacturing of a scale model along with numerical simulations in developed countries (England, France, Japan, etc.). The test of the dynamics characteristics of full-scale models is problematic in that it is expensive and time-consuming because an entire large-scale test plant needs to be constructed, difficulties are involved in the test configuration, etc. To overcome these problems, an analytical study involving dynamics tests and computer simulations using a scaled bogie model that applies the laws of similarity was carried out. In this study, we performed stability analysis on a 1/5 small scaled bogie for parameters such as the running speed and carbody weight by using an analysis model. Furthermore, we verified the reliability by using a small-scaled derailment simulator and examined the dynamic characteristic of the 1/5 small scaled bogie.

• The Journal of the Korea Contents Association
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• v.17 no.2
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• pp.687-695
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• 2017

This study tried to confirm the effective intervention to reduce drinking frequency and problem behaviors among the three interventions; school based, feedback, and behavior change. Meta-analysis was conducted targeting at 16 studies of randomized controlled trial in which alcohol intervention has been applied to adolescent. The drinking frequency and problem behaviors were analyzed by follow up period. There was a significant difference in the feedback intervention to reduce the frequency of drinking under 3 months of follow up period. Also, there was a significant difference in the feedback intervention to reduce the problematic behaviors of drinking between 4 and 12 months of follow up period(p<.05). The study confirmed that feedback intervention is effective in reducing the frequency of drinking during the follow up period under 3 months, and it is effective in reducing the problem behaviors of drinking during the 4~12 months of follow up period. Also, the study confirmed that school-based intervention and feedback intervention were useful in reducing and preventing harmful effects of drinking by adolescents.

• Cartoon and Animation Studies
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• s.50
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• pp.131-151
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• 2018

Notwithstanding various discourses among scholars on the unique characteristics of comics, in Korea there is nevertheless a scarcity of quality research on the subject. Therefore, to promote quality research, it is important to consider how to best use source materials in the field of comics scholarship. Source materials can generally be categorized into three types: pre-existing comics, scholar-generated comics and user-generated comics. For this study, user-generated comics are the primary source materials, specifically comics created by mothers of children with disabilities. It is intended that this research will contribute to the future direction of education for mothers who suffer from a relative sense of alienation as the primary caregivers of children with special needs. Although therapeutic arts and cultural programs make a tremendous difference in the lives of these mothers, teaching methodology and educational opportunities are extremely limited. Furthermore, existing scholarship focuses primarily on either the psychological transformation of the individual or a phenomenological approach for parents to understand and deal with the problematic behavior of children with disabilities. However, this research does little to help improve learning programs for these parents. Against this backdrop, this research sets out to consider the potentiality and effectiveness of using comics in the education of mothers of children with disabilities. These mothers, by creating comics, develop better awareness of themselves in a positive and enriching way. It is therefore hoped that this research provides a useful analysis for developing the potentiality and effectiveness of these programs.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.20 no.3
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• pp.129-139
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• 2009

Objectives : This study evaluated the effectiveness of school-based mental health screening and treatment linkage programs, focusing on attention-deficit hyperactivity disorder (ADHD) and adolescent depression. Methods : All 11,158 children and adolescents aged 8-14 years in Seoul received a school-based mental health screening, consisting of the Korean versions of the ADHD rating scale and the Child Behavior Checklist (CBCL), for ADHD, and the Center for Epidemiological Studies Depression Scale (CES-DS) and the Suicidal Ideation Questionnaire-Junior (SIQ-JR), for depression. The high-risk children's and adolescents' diagnoses were confirmed using the Diagnostic Interview Schedule for Children-IV (DISC-IV). Treatment linkage programs were managed by the Seoul Metropolitan Community Mental Health Center (Program 1), the Seoul Metropolitan Office of Education (Program 2), or the Dongjak District Office of Education (Program 3). We estimated and compared the referral rates of the three programs. Results : Program 1 screened and referred 22.9% of ADHD youths to mental health services, Program 2, 68.8%, and Program 3, 40.0%. Program 1 screened and referred 22.8% of depressed youths to mental health services, Program 2, 53.8%, and Program 3, 88.9%. Key elements for successful screening and referral programs were an effective school/community mental health center/Office of Education network, the parents' financial support and perception of their child's mental health status as being problematic, and the teachers' active engagement. Conclusion : This is the first study investigating the effectiveness of school-based mental health screenings' linkage to treatment for primary and middle school students in Korea. An effective network for community mental health and improvements in parents' and teachers' perceptions regarding mental health are needed for more successful treatment linkage.

• Industry Promotion Research
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• v.5 no.2
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• pp.71-81
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• 2020

This study has verified the process of helping actors recognize their sexual problems linked to sexual violence cases through early sexual experience history, and exploring and insighting the stuck feelings of sexual violence actors through psychodrama, which focuses on expressing behavior and emotions. The research questions were divided into sexual violence cases and perceptions of actors, actual insights through psychodrama, and dealt with past biblical history related to actors' events and events, exploration of childhood trauma, and insights and changes in emotions through psychodrama. The results from the study are as follows. First, they showed low self-understanding levels and frequent use of defense mechanisms against sexual violence cases in an environment related to cases involving sexual offenders, and were aware of the problematic factors affecting the cases in the course of their daily lives, but did not take them seriously. Second, there were many distorted masculinity and adult sites related to participants' biblical experience history. In the early experience of sexual activity, it was often viewed as a sexual object rather than an emotional exchange with a lover, and the contents of the initial Bible experience were linked to actual sexual violence cases committed by participants. Third, childhood trauma of participants through psychodrama led to rapidly changing family circumstances and abuse by fathers. Fourth, the actual content of emotions represented by anger in the early stages of psychodrama is meaningful in that it revealed the process of sadness, pain, regret and longing for a departing mother leading to objective insight into emotions through the catharsis process.

• Journal of agricultural medicine and community health
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• v.25 no.2
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• pp.327-341
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• 2000

Objectives : This study is to evaluate the status of health promotion behaviors and life styles in rural areas. Methods : A self-administered questionnaire survey was carried out for 1,350(men 461 persons, women ; 889 persons) people in rural areas ages of 30 years and older in Buk-myun, Uljn-Gun and Kikye-myun, Pohang-City, Kyungsangbuk-Do from March 13 to 25 in 1999. We established health promoting scores by using data results. Collected data was analyzed through the chi-square trend test, Student's t-test, ANOVA and multiple comparison. The data was analyzed using a SPSS/win statistical package. Results The age-adjusted prevalence of individual health promoting behavior by sex was 39.4% in men and 94.0% in women in regard to non smoking 39.4% and 92.5% in non-drinking 17.2% and 13.1% in physical exercise on a regular basis 79.8% and 80.0% in a regular diet 81.6% and 75.6% in maintaining desirable body mass index 81.2% and 78.2% in sufficient physical rest 84.2% and 82.1% in sufficient mental rest 48.4% and 40.6% in supplemental intake for health. The age-adjusted proportion for a screening examination in stomach cancer by sex was 39.9% in men and 37.1% in women 31.8% and 28.0% in liver cancer 17.0% and 12.7% in colon cancer 37.0% and 31.0% in undergoing a medical health screening. The health promoting scores were statistically significant, higher in the younger aged women's group(p<0.01). In spite of very low health promoting scores, some men thought of themselves healthy. Conclusions : The health promoting scores showed a gradual improvement as ages in men increase. Although men in ages of 30 to 40 were found to have lower scores in their health promoting scores, they were still to believe that none of health status is problematic. However, it was shown a vice-versa effect in women. They thought of their health as in a bad condition, but in measurement scores outranked their personal beliefs. In general, as ages increase one tends to consider of his or her health status poor. Therefore the plans for health improvement are needed to be come up.

• Journal of Korean Tunnelling and Underground Space Association
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• v.22 no.5
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• pp.543-561
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• 2020

This paper is the result of the study on the effect of the support structure of the tunnel steel rib. In tunnel excavation, the top and bottom half excavation methods result in subsidence of steel rib reinforcement due to insufficient support of steel rib reinforcement when the ground is poor after excavation. The foundation of the steel rib installed in the upper half excavates the bottom part of the base, causing the subsidence to occur due to various effects such as internal load and lateral pressure. As a result, the tunnel is difficult to maintain and its safety is problematic. To solve these problems, steel rib support structures have been developed. For the purpose of verification, the behavior of the supporting structure is verified by model experiments reduced to shotcrete and steel rib material similarity, the numerical analysis of ΔP and ΔP generated by bottom excavation by Terzaghi theoretical equation. As a result, it was found that the support structure of 20.100~198.423 kN is required for the 10~40 m section of the depth for each soil of weathered soil~soft rock. In addition, as a result of the reduced model experiment, a fixed level of 50% steel rib deposit of steel rib support structure was installed. The study shows that the installation of steel rib support structures will compensate for uncertainties and various problems during construction. It is also thought that the installation of steel rib support structure will have many effects such as stability, economy, and air reduction.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.30 no.4
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• pp.335-341
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• 2017

In this paper, beam finite elements with higher-order derivatives' continuity are formulated and evaluated for various boundary conditions. All the beam elements are based on Euler-Bernoulli beam theory. These higher-order beam elements are often required to analyze structures by using newly developed higher-order beam theories and/or non-classical beam theories based on nonlocal elasticity. It is however rare to assess the performance of such elements in terms of boundary and loading conditions. To this end, two higher-order beam elements are formulated, in which $C^2$ and $C^3$ continuities of the deflection are enforced, respectively. Three different boundary conditions are then applied to solve beam structures, such as cantilever, simply-support and clamped-hinge conditions. In addition to conventional Euler-Bernoulli beam boundary conditions, the effect of higher-order boundary conditions is investigated. Depending on the boundary conditions, the oscillatory behavior of deflections is observed. Especially the geometric boundary conditions are problematic, which trigger unstable solutions when higher-order deflections are prescribed. It is expected that the results obtained herein serve as a guideline for higher-order derivatives' continuous finite elements.

• Journal of Preventive Medicine and Public Health
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• v.19 no.2 s.20
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• pp.203-212
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• 1986

Hypertension is one of the most well known risk factors for cerebrovascular or coronary heart disease and is a major public health problem. Early detection and treatment of hypertension are essential, but the compliance of treatment on hypertension is not easy to achive. Hypertensive workers are being detected by the annual screening under the Labour Standard Law in Korea but the solidified control system for them is not existing. This study about workers 'Motive-Belief-Action in non-drug and drug treatment of their hypertension would be worthwhile to interpret how the workers actually behave in coping with hypertension, and also would be advisable to construct the follow-up program in Korea. In the field research process two criteria were used to select sample group. The first criterion included the workers who were screened to be hypertensive with their blood pressure above 160/95 in this survey. The second one was used to classify study-group respondents who had known their hypertension by successive annual screening. From such criteria a total of 156 male workers were sampled in 21 industries, the author interviewed them using the structured questionnaire which consisted of Belief-Motive-Action items about non-drug and drug treatment for hypertension with open-ended question on symptom of hypertension. The summary is as follows: 1) Sixty-one percent of respondents had ever checked their blood pressure somewhere besides the annual screening. 2) Most respondents(97.2%) complained no symptoms of hypertension at all. 3) Belief level of non-drug treatment was relatively high (82.1%-64.7%), but motive(55.1%-28.2%) and action(38.5%-16.7%) levels were low. 4) Belief level of drug treatment was relatively lower than that of non-drug treatment, blue collar workers showed higher artier level of drug treatment than white collar workers, and correlation coefficient between belief and motive on drug treatment was lower in group of not-recognizing their family history of hypertension than recognized group. Such findings indicated that belief on drug treatment of hypertensive workers would be problematic. 5) White collar workers showed significant lower correlation coefficients between Motive and Action of salt restriction, restriction of fatty diet and relaxation than blue collar workers. 6) Mild hypertension group showed low levels of Motive and Action of non-drug treatment(salt restriction, restriction of fatty diet and relaxation) and also showed low correlation coefficient between Belief and Motive of above non-drug treatment.

• Journal of the Korea institute for structural maintenance and inspection
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• v.25 no.4
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• pp.46-55
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• 2021

Concrete structures can cause various problems as the number of common years increases when exposed to external extreme climate conditions. Among these problems, freezing and thawing occur due to the action of extreme climate factors such as heavy rain and heavy snow, which have become the most problematic in recent years. In this study, we present a rapid freezing and thawing test method of concrete in the air, referring to KS F 2456, as Seoul exhibits very dry weather during the period of freezing and thawing. Concrete test specimens and RC beams were fabricated to perform rapid freezing and thawing of 0, 100, 200, and 300 cycles, and the performance evaluation confirmed the degradation of each subject in material and member units. The design strength of 24 MPa, which performs rapid freezing and thawing in the air up to 300 cycles, decreases by 5.24 MPa (21%), and as rapid freezing and thawing in the air increases the stress burden on reinforced concrete bending members, reducing the energy absorption (dissipation) ability of structures due to earthquakes.