• Proceedings of the KIEE Conference
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• 1997.07a
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• pp.181-183
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• 1997

In this paper the analysis and optimum design of ceramic insulator is studied. The finite element method (FEM) is used for the electromagnetic solution and the design sensitivity analysis is used for the optimization. The parameterization of design variables and movable points is introduced and the linear function is used as a interpolation function.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2000.10a
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• pp.296-301
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• 2000

Bend test for metallic materials was conducted on samples of galvanized steel pipes being used in greenhouse farms. A secular change of yield strength for galvanized steel pipes was analyzed with the part of buried in the ground and exposed in the atmosphere. From those experimental results and corrosion rate of galvanized film, the standard durable years for pipe framed greenhouses are estimated that the small sized pipe houses of movable type is 7∼8 years and the large sized pipe houses of fixed type is 14∼15 years.

• Proceedings of the ESK Conference
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• 1997.10a
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• pp.359-365
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• 1997

When grasping a movable object or making an object move, humans feel kinesthetic sense. Kinesthetic sense is the human sense that the human feels in response to the motion acted on the human. The objecive of the paper is tranforming the kinesthetic sense to quantitized data that is useful from the viewpoint of engineering. To provide various motion patterns, 2-dimensional motion generator was built using 2-axis linear motors. Active stiffness and active damping were implemented by means of current control and force feedback techniques. Based on Taguchi method, the most dominant factors to affect kinesthetic sense were investigated. Also, some functions adequate to quantize the kinesthetic sense were found.

• Structural Engineering and Mechanics
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• v.8 no.6
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• pp.547-560
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• 1999

In this paper an asymptotic iteration method is adopted to analyze non-linear free vibration of reticulated circular plates composed of beam members placed in two orthogonal directions. For the resulting linear ordinary differential equations in the process of iteration, the power series with rapid convergence has been applied to obtain an analytical solution for non-linear characteristic relation between the amplitude and frequency of the structure. Numerical examples are given, and the phenomena indicating hardening of such structures have been presented for the (immovable or movable) simply-supported and clamped circular plates.

• Proceedings of the IEEK Conference
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• 2001.06e
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• pp.161-164
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• 2001

In this paper, we has been studied self controlled mobile robot system with CCD camera. This system consists of TMS320F240 digital signal processor, step motor, RF module and CCD camera. we used wireless RF module for movable command transmitging between robot and host PC. This robot go straight until 95 percent filled screen from input image. And the robot recognizes obstacle about 95 percent filled something, so it could avoid the obstacle and conclude new path plan.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1990.10a
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• pp.91-94
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• 1990

The behavior of charged particle in dielectrics have a many effects on characteristics of the insulating materials. In this paper, numerical analysis method by hopping model was investigated application of TSC. As the results, there was a difference between characteristics of TSC by dipole polarization. Physical constant of movable ion corresponding to the experimental results was evaluated and also. Numerical calculations of unsaturated TSC and I-V characteristics were carried out by was of hopping model.

• Proceedings of the Korea Institute of Convergence Signal Processing
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• 2000.12a
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• pp.37-40
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• 2000

This paper deal with a movable boundary multiple access scheme and frame format for ATM over satellite. By mathematical modeling and simulation, we can see that suggested frame format is suitable for non-realtime traffic users.

• Proceedings of the KSR Conference
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• 1999.11a
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• pp.519-525
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• 1999

This paper describes a crashworthy design for the front structure of KHST (Korean High Speed Train) under the SNCF accident scenario (collision against a movable rigid mass of IS tons at 110 km/h). The front structure designed in a new concept shows good behaviours in crashworthy point of view. It collapses in a progressive and well-controlled fashion. To evaluate the design by considering real situations, the power-car is simulated for accidents collided against a dump truck of 15 tons at 110 km/h. The front end structure of it shows a good response on crashworthiness.

• Proceedings of the KSR Conference
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• 1999.11a
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• pp.526-533
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• 1999

Tn this study, the crashworthy design of the full rake of KHST (Korean High Speed Train under development in G7-project) is numerically evaluated using 2-dimensional crash dynamics. The results of KHST are compared with those of TGV-K (TGV for Seoul-Pusan line). KHST shows better crashworthy behaviors after impact. Specifically, impact forces, decelerations and overriding displacements are much reduced in KHST All the design guidelines under SNCF accident scenario (collision against a movable rigid mass of 15 ton at 110 km/h) are satisfied in KHST.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.28 no.2B
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• pp.105-116
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• 2003

The differentiated service architecture is based on a simple model by applying a per-class service in the core node of the network. However, due to the simplified network behavior, the network structure and provisioning were more complicated. If a service provider wants the dynamic provisioning or better bandwidth guarantee, signaling protocol with QoS parameters or admission control method should be deployed in DiffServ network. However, these methods increase the complexity. Therefore, we proposed DPM2 mechanism for admission control in the DiffServ network. In this paper, we describe and survey the admission control methods that are applicable to IP networks and propose also the dynamic provisioning mechanism based on the bandwidth broker and distributed measurement based admission control and movable boundary bandwidth management to support heterogeneous QoS services in differentiated service networks. For the performance evaluation for proposed mechanism, we used ns-2 simulator.