• Proceedings of the KSR Conference
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• 2011.10a
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• pp.255-260
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• 2011

The train control system is a facility to ensure safe train operation, and its safety is the most important factor for system introduction. Therefore, in order to improve practical usability in the business, safety analysis and evaluation of train control system and train control related core technologies are needed. Korea Railroad Research Institute has carried out standard development of radio-based train control system as a government research and development project. In this paper, we present a system specification of ATP, a core part of train control system, for standard system of Korean radio-based train control system(KRTCS). The paper present a operation environment and primary ATP functions, and functional requirement specifications.

• Journal of the Korean Society of School Health
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• v.11 no.2
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• pp.279-284
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• 1998

The purpose of this study was to propose the baseline data for the development of a stress measurement tool for primary school students. The data were collected from 650 students from four primary schools in the Chon-buk area from April 1 to May 30, 1995. Through a pretest and literature review a questionaire was designed with 57 stressors experienced by school children in daily life. Reliability of the tool was tested by a Cronbach's alpha and the result was ${\alpha}=.9137$. Factor analysis was applied to organize the 57 items together. As the result, 8 factors were obtained and these factors explained 40% of the variance. The 8 factors were: 1) Life events related to family, 2) Conflict related to friend & senior or junior, 3) Educational attitude of parents, 4) Own personality, 5) School life events, 6) Scolding by teacher and parent, 7) Conflict with interpersonal relationship, and 8) Change of situation.

• 제어로봇시스템학회:학술대회논문집
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• 2003.10a
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• pp.1689-1693
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• 2003

Communication based train control system is applied regularly worldwide. And this system may be used in domestic soon. Communication based train control system does not depend on conventional track circuit. Therefore, position and distance control of train to prevent collision with leading train may become important safety factor. This paper developed collision avoidance algorithm to control trains of several units efficiently for this. In developing a collision avoidance algorithm, it is desirable to avoid the need for additional system. Additional system restricts the development of the algorithm by limiting the effectiveness of the algorithm to only those areas where the additional system can be afforded and has been installed.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2008.04a
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• pp.532-537
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• 2008

Existing management of bridge is being writing management paper at field and computing at office. These are instability factor on bridge structure because of authenticity deterioration, disutility data management. Therefore, this paper is possibility expedient and objectivity inspection considering check situation at field for solve these problem. And development software which is intelligent bridge maintenance based Ubiquitous. This software can increase authenticity of data through computerization of maintenance data and reduce of time. Also, we confirm effective and facilitate maintenance management using ubiquitous.

• Journal of Agricultural Extension & Community Development
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• v.12 no.2
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• pp.257-270
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• 2005

The purposes of this study were to explore the differences of decision making in farming settlement and to analyze attributes for vocational decision making of rural youth. The study was carried out by literature review and questionnaire. To analyze vocational decision making of rural youth, the data were collected from 196 rural youth by stratified random sampling. The SPSSWIN/ver10 was used for analyzing data with frequency, percentage, t-test ANOVA and factor analysis. The major findings of this study were as follows; 1) Rural youth decided to become farmers at the middle and high school stage for farming succession and eco-friendly life orientation. 2) Youth parents were the major source of influence on their rural youth to settle in farming. 3) Rural youth with high economic status, upper academic achievement and university graduation showed higher autonomous decision making and lower heteronomous decision making. 4) Rural youth with low economic status and low academic achievement showed unstable vocational decision making. 5) The study suggested that rural youth with unstable decision making should get more educational opportunities and supports.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.28 no.1
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• pp.20-24
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• 2017

Over the past quarter century, research on physical punishment has proliferated. Almost without exception, these studies have identified physical punishment as a risk factor in children's behavioral, emotional, cognitive and brain development. At the same time, the United Nations has established that physical punishment constitutes a breach of children's basic human rights to protection and dignity. Together, research findings and human rights standards have propelled profound global change. To date, 51 countries have prohibited all physical punishment of children. In this article, we review the literature on physical punishment within its historical context, and provide recommendations for health professionals working with families.

• Asian Pacific Journal of Cancer Prevention
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• v.16 no.5
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• pp.1677-1682
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• 2015

Cancer progression is attained by uncontrolled cell division and metastasis. Increase in tumor size triggers different vascular channel formation to address cell nutritional demands. These channels are responsible for transferring of nutrients and gaseous to the cancer cells. Cancer vascularization is regulated by numerous factors including vascular endothelial growth factors (VEGFs). These factors play an important role during embryonic development. Members included in this group are VEGFA, VEGFB, VEGFC, PIGF and VEGFD which markedly influence cellular growth and apoptosis. Being freely diffusible these proteins act in both autocrine and paracrine fashions. In this review, genetic characterization these molecules and their putative role in cancer staging has been elaborated. Prognostic significance of these molecules along with different stages of cancer has also been summarized. Brief outline of ongoing efforts to target hot spot target sites against these VEGFs and their cognate limitations for therapeutic implications are also highlighted.

• Journal of Institute of Control, Robotics and Systems
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• v.21 no.4
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• pp.330-335
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• 2015

Approximately 23% of traffic accidents appear to be caused by drowsiness while driving. This fact shows that drowsy driving is a big factor in many traffic accidents. Therefore, the development of a drowsiness checking system is necessary to prevent drowsy driving. In this paper, we analyse the changes of the histogram of eye region images which are acquired using a CCD camera. We develop a drowsiness checking system using this histogram change information. The experimental results show that our proposed method enhances the accuracy of checking drowsiness by nearly 98%, and can be used to prevent vehicle accidents due to the drowsiness of a driver.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.05d
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• pp.38-42
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• 2003

The use of VPI impregnated mica tape as high voltage insulation for large rotating electric machines requires a careful balance of processes and materials to obtain the desired electrical, mechanical and thermal characteristics. The stator insulation systems such as epoxy bonded high voltage mica tape have been produced for many years. One such system employing an epoxy and anhydride impregnating resin developed by Hyundai Heavy Industries, Co. (hereafter, HHI), to satisfy customer requests for an epoxy bonded insulation system. HHI applies the following electrical and thermal evaluations such as dielectric breakdown, voltage endurance, dissipation factor vs. temperature, isothermal weight loss, and so on. A detailed laboratory evaluation can describe specific physical limitations for an insulation system and permit development of long-term operation guidelines that permit full utilization of the proposed system. HHI has found these evaluations very helpful in qualifying insulation system for the repair of both large motors and generators.

• Asian Journal of Turfgrass Science
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• v.14 no.1
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• pp.257-262
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• 2000

This study was conducted on ten golf courses in the vicinity of Yongin city to find out the kinds of algae and factors affecting algae development on creeping bentgrass greens. 1. Serious algae contamination was observed on almost of creeping bentgrass greens after and before rainy season. 2. There were ten kinds of algae occurred on creeping bentgrass greens, most of which were Oscillatoria spp. (bluegreen algae) 3. The fact that the same kind of algae inhabiting in the pond was observed on greens indicated that greens were easily contaminated by algae in case of greens watered with the pond. 4. This study showed that the main factor affecting algae contamination on greens was not high total nitrogen and phosphorus contents in the green soil, but pond watering.