• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.34 no.3
• /
• pp.8-15
• /
• 2011

The computer-based simulation tools are currently used overwhelmingly to simulate the performance of automotive designs. Then, the search for an optimal solution that satisfies a number of performance requirements usually involves numerous iterations among several simulation tools. Therefore, meta-modeling techniques are becoming widely used to build approximations of computationally expensive computer analysis tools. The set-based approach proposed in the first report of a four-part paper has been a test bed for the innovation of vehicle structure design process in the Structural Design and Fabrication Committee of JSAE(Society of Automotive Engineers of Japan). In the second report, the proposed design approach is illustrated with a side-door impact beam design example using meta-modeling techniques.

• IE interfaces
• /
• v.16 no.4
• /
• pp.411-420
• /
• 2003

This paper deals with how Korea Post establishes a nation wide network of the parcel warehouse & distribution centers(PWDC). The state-of-the-art of the parcel service business in Japan and U.S. are introduced for benchmarking purpose. Potential customers of the PWDC and their major goods are identified. Current major customers of the Korea Post were interviewed to figure out the potential demand of the PWDC service. Five-year volume estimation of the Korea Parcel Service(KPS) is presented based on the past 30-month B-C volume of the four major door-to-door delivery service companies in Korea. Yearly construction plan of the PWDCs is proposed; and the networking strategy of PWDC is discussed.

• 한국전산유체공학회:학술대회논문집
• /
• 2001.05a
• /
• pp.170-175
• /
• 2001

Fire inside light railway transit(LRT) was simulated for various fire scenarios using CFD analysis in order to assess the safety of passengers. Considered in the present paper are the effects of locations of fire, a fire size, an operation of ventilation system and an opening time of door on evolution of temperature and smoke concentration inside the LRT. For fire simulation, fire cells releasing heat and smoke corresponding to fire size were positioned at the location of fire. From the results, it is seen that the ventilation system and the opening time of door were the most important factors on temperature and smoke concentration inside the LRT

• The Transactions of the Korean Institute of Electrical Engineers P
• /
• v.59 no.2
• /
• pp.158-162
• /
• 2010

PSD is automatically opened and closed when subway train arrive on the station. This system was designed to control electric automatic system. These doors will provide passenger safety, energy saving and a good environment in subway. The monitoring and control systems of PSD are configured so that they can be operated in automatic mode in connection with ATO through the composite control panel in the station control room. The objective of this paper is to obtain high reliability that is essential for monitoring and control systems of PSD. The power supply is based on protection circuit using DC power bridge from two UPS. Also, stable communication system consists of CAN communication line redundancy and RF cross protection algorithm. Monitoring state display results show the validity of the proposed high reliability monitoring and control systems of PSD.

• Transactions of Materials Processing
• /
• v.15 no.4 s.85
• /
• pp.289-294
• /
• 2006

To reduce automobile parts weight, TWB(tailored welded blank) forming is widely used in panel forming. But products used TWB forming process have many defect, wrinkle, crack and springback. So study of TWB forming process character is very important. In this study one of the current problems of TWB forming was analyzed, especially for the try-out process of inner door panel without frame. A comparison was made between actual measurements and prediction of forming analysis for formability and springback. Also a new analysis die model which have additional plane on die surface was proposed to correct result of forming analysis. This proposed method overcomes the difference for TWB forming result between try-out and analysis.

• Journal of the Korean Home Economics Association
• /
• v.18 no.1
• /
• pp.111-119
• /
• 1980

To identify interest of primary school children and find the correlations between their interest and school achievement and emotion. Cluster-sampled 410 primary school children in Seoul were interviewed by the standardized questionnaire and data were analyzed statistically by computer system. 1) High SES has positive influence on school achievement. 2) children in higher SES tend to like more in-door-play or instrumental play. 30 More spending their times with in-door-play or instrumental play, children make better school achievement. 4) There is no significant relationships between the TV watching time and emotional stability. 5) More interest I social, natural science and arithmetic, children make higher achievement in all subjects above average. 6) Children's emotion has no association with school achievement, playing types and TV watching time but has positive association with SES.

• 한국전산유체공학회:학술대회논문집
• /
• 2010.05a
• /
• pp.496-500
• /
• 2010

Understanding train-wind is the best method to know how to optimize subway ventilation system. The capacity and efficiency of the subway ventilation system are known by pressure and velocity while train runs. Analysis of the internal flow in subway tunnel and around subway station are studied using numerical methods. Characteristics of internal flow and influence of subway ventilation system for the subway station with platform screen door and tunnel are analyzed by unsteady state analysis. Velocity and pressure of train wind transformation are compared at around subway ventilation system and the internal flow is investigated at the subway tunnel.

• Journal of the Korean Society of Manufacturing Technology Engineers
• /
• v.22 no.2
• /
• pp.304-309
• /
• 2013

In chemical, medical or biology laboratories Fume Hoods are basic facilities which can protect researchers from dangerous gas as blowing the contaminated air outside. After the air inside the laboratory room is sucked into the hume hood, then, it is blew out by a fan rotated by an AC induction motor. In addition, a damper controls the inside opening of a duct, which the air flows through. The face velocity, air velocity through the front door, have to be kept constant as the set value even though the opening of the door is varied. However, conventional fume hood used to be operated by operator's manual switches. So that, in this paper an automatic control system is developed which controls the face velocity by adjusting the rotating speed of the blow motor and the opening of the damper. Experiments show that this developed system can be used at such laboratories.

• Proceedings of the KSR Conference
• /
• 2010.06a
• /
• pp.794-801
• /
• 2010

Recently the Korean Government is increasing investment and interest on railway in the transportation field as "low carbon and green growth" policy become main national development strategy. While railway competitiveness is weakening over the road from the inconvenient door-to-door and transfer system of railway, it is meaningful to review excellent railway transfer system of advanced countries and adapt their implications for Korea. Their transfer systems like Japan, Hongkong, France, U.K. and German can be categorized in this research as kinds of transfer & connectivity system and transfer facility & flow planning, and, as a result, their implications can be concluded. Also, analyzing transfer system of Korea's main stations and reviewing the difference between Korea and other countries, this paper suggests main principles and directions of urban planning, alignment of rail line, partnership of project stakeholder in the establishment of transfer system in the railway station in the future.

• Proceedings of the KSR Conference
• /
• 2007.05a
• /
• pp.1584-1589
• /
• 2007

Plug-in type door is installed in recently designed tube. It is world wide trend to fulfill the customer's demand. But, plug-in door need widely gap between doorway and platform and it is raise an serious accident. Therefore, newly designed train must have safety device like a sliding step to prevent incident. This paper present about development process for sliding step. Trend of sliding step, development plan, course, technical description, and etc. will be included in this paper.