• Transactions of the Korean Society of Automotive Engineers
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• v.3 no.2
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• pp.112-121
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• 1995

Various CAE technologies are used in automobile industries for the purpose of design and analysis. In this paper, a fatigue life evaluation system FLEVA based on the local strain approach is developed and the system is applied for the fatigue strength design of the suspension knuckle, an automobile component. Various steps such as material test, finite element analysis and cumulative fatigue damage analysis of the suspension knuckle were taken. The usefulness of the approach was verified by the fatigue test on the suspension knuckle.

• Transactions of the Korean Society of Mechanical Engineers
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• v.17 no.12
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• pp.2970-2981
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• 1993

In hot closed-die forging the load increases rapidly near the final stage. Preforming operation is important to both the sound final forging and die-service life. In this study, the material flows during preforming and final forging are investigated. The physical modeling with Plasticine as a model material showed clear flow patterns. The forging process were numerically simulated by the finite element method with the isothermal and the non-isothermal models. The flow patten of the isothermal simulation showed good agreements with the experiments. Temperature changes and pressure distributions on the die surfaces during one cycle of the forging process were obtained from the non-isothermal simulation. High pressure and temperature were developed at certain areas of the die surfaces. It was concluded that those areas usually coincide with each other and should be distributed by the preforming operations to enhance the die life.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.7-9
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• 2004

현재 응용 그리드와 그리드 인프라는 매우 밀접한 관계를 가지고 혼재하여 있다. 이것은 개발하고 사용하는 데 있어 방해요소가 된다. 응용 그리드를 사용하기 위해 그리드 인프라에 대해 알아야 하고, 그리드 인프라를 구축하기 위해 응용 그리드를 알아야 하는 것이다. 포탈은 응용 그리드와 그리드 인프라 사이의 경계를 구분 지어 주고, 양 진영을 중재해야 한다. 응용 그리드에서 이루어질 수 있는 서비스를 통합하여 일관적인 서비스를 포탈에서 제공하고자 한다. 하지만, 그리드 서비스는 데이터 전송이 필요한데, 웹 환경(WAN)에서는 대화식 작업의 응답 속도가 떨어져 작업 효율을 떨어뜨린다. 이러한 단점을 웹 환경에서 극복하고자 포탈의 일부 기능을 사용자의 지역 환경에서 서비스할 수 있는 방법을 제안한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.11a
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• pp.510-513
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• 2017

자전거 이용자 급증으로 자전거의 도난 및 분실을 방지하여 사용자를 안심시켜주고 주행 중 위험요소를 줄이고자 하는 목소리가 높아지고 있다. 본 논문에서는 애플리케이션 개발을 위해 MCU(Micro Controller Unit)인 Arduino Mega 2560 기반에 블루투스(Bluetooth) 통신 방식을 사용하여 자전거 잠금장치, 위치 추적 장치를 조작하고 후방 감지 장치를 제어하였으며 초음파 거리센서 값을 이용하여 LED Strip 및 진동 모터로 사용자에게 주행 상태를 알리는 장치를 구현하였다.

• Electronics and Telecommunications Trends
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• v.18 no.2 s.80
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• pp.11-24
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• 2003

이동 Ad Hoc 네트워크는 고정적이고 계층적인 인프라스트럭처 네트워크와는 비교되는, 이동 노드만으로 구성된 자율적이고 수평적인 네트워크이다. 이동 Ad Hoc 네트워크의 이동 노드는 중재자의 도움 없이 능동적인 연결 설정이 가능하고 네트워크의 참여 또는 이탈이 자유로우며 에너지원의 공급이 제한되어 빈번하게 네트워크의 토폴로지를 변화시킨다. 이러한 망의 특성상 이동 Ad Hoc 네트워크 기술은 하위 계층의 전파 전파, 전파 간섭 및 전력 제어에서부터 링크 계층의 다중 접속 및 자원 할당, 네트워크 계층의 라우팅, 트랜스포트 계층의 연결 설정 및 유지, 그리고 보안 및 상위 계층 애플리케이션에 이르기까지 다양한 기술적 해결 요구사항을 갖는다. 본 고에서는 이러한 Ad Hoc 네트워크의 특징과 특성을 살펴보고 관련 주요 요소 기술과 과거부터 현재까지 이동 Ad Hoc 네트워크 기술 분야에서 진행되어온 연구동향을 살펴본다.

• Journal of the Korean Institute of Landscape Architecture
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• v.44 no.6
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• pp.107-119
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• 2016

Currently, 230 domestic tourist destinations have been designated, established, and operated in accordance with the Tourism Promotion Act. According to the results of preceding research, more than 30% of them have been getting into the stagnation or decline stage. This is becoming a burden to local governments operating and managing tourist destinations, making it necessary to seek resolution measures. Thus, this study determined the activation elements of stagnant/declined tourist destinations regeneration to deal with problems of domestic stagnant or declined tourist destinations and also to regenerate rational and sustainable tourist destinations. This study conducted a survey with experts based on causes for stagnation and decline of domestic tourist destinations suggested by preceding research. Based on the survey results, the activation elements of stagnant/declined tourist destinations regeneration were drawn through the Delphi Technique and Analytic Hierarchy Process. And then the priority and weight of the drawn activation elements of stagnant/declined tourist destinations regeneration were drawn for the sake of reasonable project progress of tour site regeneration. In the results of the analysis, as activation elements of stagnant/declined tourist destinations regeneration, a total of seven upper-attributes, 23 sub-attributes, and 66 detailed-elements were drawn. It would be possible to raise the efficiency of projects and rational decision-making when executing future tourist destinations regeneration projects by using the activation elements drawn. Also, the drawn elements could be applied to the actual tourist destinations regeneration projects as measures for the stagnant/declined domestic tourist destinations' contribution to the vitalization of local economy based on sustainability, prohibition of thoughtless development of domestic tourism projects, and also efficient use of tourism resources.

• Journal of Digital Convergence
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• v.13 no.2
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• pp.381-391
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• 2015

The purpose of this study was to investigate the trends in research on the effects of virtual reality technology applied to rehabilitation for disabled. I have collected 60 papers published in Korea(2000-2014), and analyzed it by the P.I.C.O. method. As a result, adults and the elderly are most common subjects, and projection type has been used frequently in researches. It were included mostly balance, upper extremity function, and gait that the dependent variables represents the intervention effects. I interpreted it as the ICF factors. So, research topics were the most common mobility, in contrast to educational, vocational, recreational area as dealing with the participation area is very small. In the future, we should focused on social aspects for useful intervention in real life of people with disabilities based on virtual reality technology, and virtual reality technology should be easy to apply in terms of cost and accessibility.

• Convergence Security Journal
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• v.15 no.7
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• pp.63-68
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• 2015

In rapid aging society, the disease prevention and management for healthy life of the elderly is very important. Regular physical activity is known to be a useful intervention for the physical and mental health of the elderly. In this study, we explore the convergence contents using IT technology as the intervention for encouraging the regular physical activity in the elderly. There are u-Healthcare and serious game as the convergence of health care and IT technology, and the serious game which is added special purpose such as education, training, and treatment to the fun-one of the game element- can be suitable to provide a variety of contents that leads to physical activity in the elderly. The contents inducing physical activities are "Puffer(ATARI, USA)", "WiiFit(Nintendo, JAPAN)", "Age Invaders(MXR Lab, SINGAPORE)", "Xbox $360^{\circ}$+kinect(Microsoft, USA)", "Tangible bicycle game(Donsin Univ., KOREA)", and "3D Gateball game(Soongsil Univ., KOREA)", and these contents can help health care of the elderly. By increasing physical activity through the use of these contents, it will be able to promote physical fitness and body function required in daily life, disease prevention, and maintain health in the elderly.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.5
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• pp.3058-3068
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• 2014

This experimental research is aimed to apply a health promotion program based on Cox's interaction model to such college students as are on the brink of dyslipidemia, so as to investigate the effects of the program on the subjects' blood lipid indexes including total cholesterol (TC), triglyceride (TG), high-density lipoprotein (HDL), and low-density lipoproteins (LDL). The subjects are 39 in all including the experimental group comprising 20 and the control group comprising 19. The analyses applied include descriptive statistics using SPSS WIN 18.0, $X^2$-test, independent t-test, and paired t-test. By means of nursing interventions which are an element of client-professional interaction, the following were offered including health information (exercise management, dietary management, health education), emotional support (sharing of experiences, encouragement, self expression), decision-making controlling (counselling by phone), and professional/ technical abilities; and blood lipid indexes were measured before and after the interventions. The results of this research found that TC, TG and LDL decreased significantly and HDL increased significantly in the experimental group, which indicates that the health promotion program was effective.

• The Journal of the Convergence on Culture Technology
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• v.5 no.4
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• pp.243-249
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• 2019

The purpose of this study is to investigate the factors affecting the respect for life of nursing students and to prepare the basic data for developing educational programs to establish proper awareness of the life of nursing students and nurturing it. This is a descriptive research study. A total of 146 nursing students were included in this study. Data analysis was performed using t-test, ANOVA, Pearson correlation coefficients, and multiple regression. The results of this study confirmed the meaning of life, spiritual wellbeing, and attitude toward death as factors influencing respect and will for life. The explanatory power of these three factors was 26.3%. Therefore, nursing students will be able to cultivate respect for life by increasing their understanding of the meaning of life, improving their level of spiritual well-being, and reducing their negative attitudes about death. Also, in order to improve the respect for life of nursing students, it will be possible to develop an intervention program to improve life respect including the factors identified in this study. Ultimately, it is expected to grow into a nurse who can provide real help to patients who are at the end of life or who are dying.