• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2009.01a
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• pp.834-837
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• 2009

Augmented Reality (AR) is a useful technology for various industrial systems. This paper suggests a new playground system which uses markerless AR technology. We developed a virtual playground system that can learn physics and kinematics from the physical play of people. The virtual playground is a space in which real scenes and CG are mixed. As for the CG objects, physics of the real world is used. This is realized by a physics engine. Therefore it is necessary to analyze information from cameras, so that CG reflects the real world. Various games options are possible using real world images and physics simulation in the virtual playground. We think that the system is effective for education. Because CG behaves according to physics simulation, users can learn physics and kinematics from the system. We think that the system can take its place in the field of education through entertainment.

• Proceedings of the KSME Conference
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• 2003.11a
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• pp.266-271
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• 2003

The numerical study was carried out to effectively cool Induction motor applied to a washing machine. The outer rotor made of steel periodically spins up and down. The stator consists of the thin layered iron plates and copper coil. The effective cooling system is necessary to solve the reliability problem caused by the electric losses at the coil and the iron plate. Because the heat transfer rate of the natural convection in partially open space is generally low, thus it is necessary to enhance the heat transfer using rotating perforated plate. The flow phenomena around the motor are very complex due to the motor geometry and the outer rotor motion. The mixed convection takes place due to the slow rotation speed. The three dimensional flow simulation was performed using rotating reference frame technique and Boussinesq approximation but the radiation effect was neglected. It was found that the angle and direction of the cooling blades play an important role in the stator temperature.

• Health Policy and Management
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• v.26 no.4
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• pp.265-270
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• 2016

Public health system for more prevention-oriented health promotion rather than hospital-based curative service, focusing population rather than individual, and comprehensive health management in the local community strongly needs to be constructed to solve major issues on efficiencies and equity problems which Korean healthcare system is facing nowadays. Public health promotes and protects the health of people and the communities where they live, learn, work, and play. Medical care tries to cure those who have diseases, but public health tries not to become ill and not to be injured. Debates on how we build or rebuild public health system, which is contrasted with medical care system, are needed in Korea, focusing how needs for healthy community and right to health are fulfilled. Public health specialists for practising population health at local community level should be systematically recruited, the function of public health centers should be strengthened, and new government organization should be established for place-based health management.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2008.04a
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• pp.162-165
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• 2008

This study aimed to provide data for planning of a small-sized complex-cultural facility for not only artists but also the common. The main interest of the study was to make them understand spirit related to the culture to each other. The data was collected from 100 artists in various art fields and 100 the common by a questionnaire and a visiting survey. The result of this study indicated that people had a little of chance to share their cultural opinions with others because there were not enough appropriate places even though they wanted it. Besides, they would like to use the place for their communication which consists of a range of their needs such as watching a play, listening to music, spending tea-time, etc.

• Proceedings of the KSR Conference
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• 2004.10a
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• pp.1390-1395
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• 2004

Recently, the load increasement and new regenerative systems of electrified railway system make it a difficult to distinguish between the load current and fault current. The failure of traction system perhaps causes over-current to flow. The high current can collapse other railway systems. If failures of the traction system takes place, the failures are detected and protected lest it should provoke high current flow. The over current from such a traction system failure permit to charge high tension voltage and produces high temperature arc, voltage instability, current cutting, and break down railway systems. The traction system failures detect and the system has to immediately cut off from over-current flow. To isolate the failure, the system can distinguish failure current from current flows. It forces us to adapt such as a new intelligent protection system. The protective system in traction system play a role of detecting and isolating failure points. In this paper, we proposed intelligent algorithm for discriminating normal and abnormal situation instead of the system being operated abnormally.

• Journal of the Korean Society for Railway
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• v.6 no.3
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• pp.169-173
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• 2003

Transportation by railroad is superior to other transport in a mass transport, stability, rapid transit, delightfulness and low-pollution etc. But, it need to ensure a track stability that supports the train-load for high-speed in transportation by railroad. Ballast resistance force resists against the buckling of track taking a rail-tie's place. So, it plays an important role in a careful train-service. So, in this papers, we forced on measuring and theorizing about the Ballast Resistance Force that play a key role in track stability and high-speed. And we studied the mechanical property. Finally, we suggested the method of securing Ballast Resistance Force and the report for a careful train-service in high-speed.

• Journal of the Korean Institute of Rural Architecture
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• v.2 no.2
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• pp.103-113
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• 2000

An effective design of a public space that properly functions as a resting place in city can be found through the community facility studies. This study, based on the ecological psychology, discusses the mutual relationships between human behaviors and physical and social environment. It is demonstrated that design elements, such as chairs, tables, stairs, a flower bed, a stair-shaped exterior wall, a pond and others play important roles in providing environment for different human behaviors in public space. These environmental design elements also increase a variety of behavior for users.

• Journal of the Korean Institute of Rural Architecture
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• v.15 no.3
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• pp.33-40
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• 2013

The rural traditional houses in Taebaek mountainous regions play important roles in figuring out values and social aspects of past time including housing life. But due to the introduction of convenient facilities in the current housing life style after industrialized society, many transformations have been taken place even to exist rural traditional folk houses such as installation of new equipment and furniture, the arrangement and function change of rooms, expansion of residential area and etc. So this study aims to secure basic data to prepare installation standard of the convenient facilities as examining convenience facility installation status of the cultural asset designated as rural traditional house, and to identify the meaning and usage of major room of rural traditional houses in order to prepare the proper balances between its original form preservation and residents' convenience living.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2004.11a
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• pp.159-162
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• 2004

The globalization through sport has its own positive point, because its speed can proceed faster than the other area. For twenty-five years long Soccer has influenced people all of the world not only as a role of the most enjoyable sport, but also as a role of the most important position in politics, economics and social fields. Moreover, soccer has comprised transcendentally within region, race and nation which has made a big market share in leisure industry. By completing this research, the Sport Exhibition should be defined innovatively as a place that enables people actively to develop their creativity. Some of overseas sport exhibitions were selected as a sample in this study, such as The National Football Museum in England, Cornilon Nord Saint Denis in France and Sir Matt Busby Way Old Trafford Manchestrer Ml6 ORA in England, which produced an experience based exhibition. Here this study is purposed to establish, efficiently, the history of korean soccer and FIFA Worldcup as a part of construction for 2002 FIFA Worldcup exhibition and to define its conceptional characteristics composition of planning and schematic design than to play a role as basic study of architectural space.

• Structural Engineering and Mechanics
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• v.32 no.2
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• pp.235-249
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• 2009

The response of concrete structures subjected to shock and blast load involves a rapid transient phase, during which material breach may take place. Such an effect could play a crucial role in determining the residual state of the structure and the possible dispersion of the fragments. Modelling of the transient phase response poses various challenges due to the complexities arising from the dynamic behaviour of the materials and the numerical difficulties associated with the evolving material discontinuity and large deformations. Typical modelling approaches include the traditional finite element method in conjunction with an element removal scheme, various meshfree methods such as the SPH, and the mesoscale model. This paper is intended to provide an overview of several alternative approaches and discuss their respective applicability. Representative concrete material models for high pressure and high rate applications are also commented. Several recent application studies are introduced to illustrate the pros and cons of different modelling options.