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Front End Module의 5마일 범퍼 충돌해석에 관한 연구
박도현(Dohyeun Park),이영호(Youngho Lee),박순조(Soonjo Park) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
As one of the cores of change of automobile industry, FEM(Front End Module) is rising on the standard of newly developed cars. FEM Carrier, front structure should be designed to endure impact energy of the car for the safe of the functional parts in order to meet the crash regulation and product requirements. Under low speed impact, crack frequently initiates at plastic part of Hybrid type Carrier. Tom Carrier means high repair cost in addition to the loss of assembling function of components such as Head Lamp, Radiator, condenser and so on. On this paper. deformation behavior of FEM on the crash was analyzed using commercial crash software pam-crash. The effect of design variables of Carrier on the strength has been investigated. The design changes of Stay and B/Beam were considered too. The results of simulation were verified by test. The most dominating factor of Carrier damage was the lateral displacement of B/Beam. Carrier and Stay design modification themselves found to be insufficient for the prevention of Carrier damage. Instead, the isolation of displacement between carrier and B/Beam has been found to be effective on the prevention of Carrier damage.
Fazli Wahid,DoHyeun Kim 보안공학연구지원센터 2016 International Journal of Smart Home Vol.10 No.2
In order to manage efficiently the energy production, storage and management system, it is very important to analyze accurately the energy requirements for residential sector because the residential sector consumes a considerable amount of total energy produced. The main aim of the paper is the assurance of energy production according to the consumer demands in an efficient manner. The energy market is an important tool for setting prices between the energy producers, suppliers and the consumers. An excellent precision in the prediction of next day consumption is required for the suppliers to get good prices in the energy traded. The main aim of this paper is to facilitate the energy suppliers to make decisions for the provision of energy to different apartments according to their demand. In this paper, we have utilized K-Nearest Neighbors classifier for daily energy consumption prediction based on classification. The process consists of five stages namely data collection, data processing, prediction, and validation and performance evaluation. The historical data containing hourly consumption of 520 apartments of Seoul, Republic of Korea has been used in the experimentation. The data has been divided into different training and testing ratios and different qualitative and quantitative measures have been applied to find the performance and efficiency of the predictor. The highest accuracy has been observed for 60-40% training and testing ratio giving 95.9615% accurate results. The effectiveness of the model has been validated using 10-Fold and 5-Fold cross validation.
Threats Analysis, Requirements and Considerations for Secure Internet of Things
Yunjung Lee,DoHyeun Kim 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.12
For the Internet of Things security, it should be considered security risk environments such as various platforms and services including smart devices that can be mounted on household electric appliances, healthcare, car, and heterogeneous networks that are connected to the Internet, and cloud services mobile apps. In this paper, we provides analysis of new security threats, caused by open-platform of Internet of Things (IoT) and interconnectivities among various smart devices and sensors via the Internet, and requirements and scenarios for establishing standards and secure IoT service.
김수상(Soosang Park),박도현(Dohyeun Park),박순조(Soonjo Park) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
In this paper, a passenger air bag(PAB) folding method using finite element analysis was suggested. As PAB is<br/> more complex in shape than other airbags, generally it takes much time and efforts than others and requires highly<br/> skilled experience to get folded finite element model. Fully folded PAB finite element model was achieved by<br/> performing the continuous series of simulations. So, Anyone without skilled experience in air bag folding process<br/> can get folded PAB easily by following the process. It can save time in PAB folding process and decrease errors in<br/> PAB deployment simulation, and is expected to contribute to the development of advanced air bag which has to<br/> consider out of position (OOP) situation.
센서 네트워크 기반의 무선 인터넷 서비스 설계 및 구현
김부림(Burim Kim),김도현(Dohyeun Kim) 한국멀티미디어학회 2007 한국멀티미디어학회 학술발표논문집 Vol.2007 No.1
최근에 유비쿼터스 컴퓨팅 환경에서 센서 네트워크 기반의 다양한 서비스를 제공하기 위한 연구가 진행되고 있다. 본 논문에서는 등산로에 설치된 센서 네트워크를 통해 수집된 상황 정보를 제공하고, WAF 기반의 무선 인터넷 서비스를 설계하고 구현한다. 이러한 무선 인터넷 서비스는 센서에서 수집된 온도, 습도, 진동 등의 데이터를 사용자에게 제공하기 위하여 센서 데이터 특성을 분석하고, 센서 네트워크 기반의 센서 정보뿐만 아니라 위치, 날씨 등의 부가 정보를 동시에 모바일 시스템에서 제공할 수 있다. 이를 통하여 등산객에게 산행에 필요한 현재 기상 및 지리 등의 정보를 모바일로 지원할 수 있을 것으로 사료된다.
ChangYoung Lee,JinSeok Yang,DoHyeun Kim 한국멀티미디어학회 2009 한국멀티미디어학회 국제학술대회 Vol.2009 No.-
Recently, the navigation service and LBS (Location based Services) based on maps provide much information services on mobile terminal. Also Internet Web provides a user various information such as the e-tour service, the e-culture service, and etc. But, the user has the difficulty searching many Internet Web sites for various services and information, because each Internet Web site provides limited information based on each service. Accordingly, in this paper, we propose a fusion mashup application model for integrating information of various culture, education, tourism, sport, transportation services based on web-GIS. And we design and implement an application prototype of the fusion mashup application program of culture, tourism, sport and bus line information, and cultural place of Island Jeju using this model. We uses the Apache web server on Linux environment, the My-SQL the database, and the Naver map OpenAPI for the application prototype. And we verify the normal operation that the application prototype provides the integrated information of culture, tourism, sport and transportation based on map.