• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2007.11a
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• pp.1302-1306
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• 2007

Joints are used extensively in various industries. For instance, structural adhesives are used in place of the traditional mechanical fasteners, such as screws and bolts, because they are much lighter and spread the stresses more uniformly across the joints. For efficient designs of joints, knowledge of static and dynamic characteristics of joints is essential. Most analysis of joints are carried out using analytical equations or finite element method. In this paper, the characteristics of four conditions of lap-joint beam are investigated experimentally. The mode shapes and nodal points of beam show that there are different deformations in each condition. These deformations may cause high stresses and may initiate local cracking and delamination failures.

• Journal of Institute of Control, Robotics and Systems
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• v.6 no.2
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• pp.197-206
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• 2000

A hybrid control structure for vision-based soccer robot system is considered. The structure is om-posed of four levels such as the role action behavior and execution levels. The control structure which is a combination of hierarchical and behavioral structures can efficiently meet the behavior and design specifications of a soccer robot system Among the four levels only the design of the action level is proposed in the paper and is experimentally evaluated. Design hypothesis and evaluation method are presented to improve the reliability and accomplishment of the robot system. Due to the essential element of soccer robot system design a systematic design procedure of the action level is proposed With the proposed structure and algorithm of the action level the excellent result was shown at the MiroSot'98 held in France.

• The Mathematical Education
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• v.50 no.3
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• pp.383-394
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• 2011

This paper analyzes subjects related to Math/Stat and studies teaching effect on subject development connected Math/Stat in software curriculum. Among many subjects related to the software, this paper shows exemplary applications of Math/Stat in the software curriculum. Thereby this opens potential application fields of Math/Stat. This confirms that Math/Stat is not only an essential subject to improve competitiveness but also a strategic element in the field of software. Therefore, by maximizing the academic outcome through the interdisciplinary combination of software and Math/Stat, it is possible to educate more competitive and skilled professionals.

• Journal of Pharmaceutical Investigation
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• v.24 no.4
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• pp.201-215
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• 1994

Recent development in the immunochemical technique has resulted in a new ultrasensitive analytical method known as liposome immunoassay (LIA). Liposome is a key element in performing liposome immunoassays, specifically designed to participate in immune reactions. A variety of markers can be encapsulated in liposomes and used as quantitative indicators of reactions. Liposome immunoassay based on agglutination, complement-mediated Iysis, cytolysin-mediated Iysis, detergent-mediated Iysis or destabilization of the liposomal membrane have been reviewed. The quantity of markers released from liposomes should be proportional to the concentration of the analytes. Therefore, liposomal agglutination and Iysis which are essential to liposomal Iysis are critically reviewed to provide a better understanding of liposome immunoassay. Based on the literature review of recent advances in liposome immunoassay for bioactive substances, this assay method may provide a convenient, specific and highly sensitive method for detecting and measuring trace amount of clinically relevant substances in the future.

• Journal of Ocean Engineering and Technology
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• v.15 no.4
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• pp.80-85
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• 2001

The early construction of the internet based ship basic planning supporting system based on the concurrent engineering and the internet technology is essential as a means for the improvement of technology and design productivity our ship building industry is facing currently. Further more, technological base construction for the construction for the construction of the cooperation system on the level of ship building industry is necessary for the technological base security to maintain and develop ship building industry continuosly in the 21st century of the information industry environment and for the technological improvement of the middle and small shipyard falling behind relatively and finally for the breaking through our ship building industry environment in which inter-enterprise competition is deeping. In this study, we designed the frame-system of the ship design supporting system and presented the development scenario based on core element technology.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.58 no.7
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• pp.1263-1269
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• 2009

Stable and sustainable power supply means maintaining a certain level of power quality and service while securing energy resource and resolving environmental issues. Distributed generation (DG) has become an essential and indispensable element from environmental and energy security perspectives. It is known that voltage violation is the most important constraint for load variation and the maximum allowable DG. In distribution system, sending voltage from distribution substation is regulated by ULTC (Under Load Tap Changer) designed to maintain a predetermined voltage level. ULTC is controlled by LDC (Line Drop Compensation) method compensating line voltage drop for a varying load, and the sending voltage of ULTC calls for LDC parameters. The consequence is that the feasible LDC parameters considering variation of load and DG output are necessary. In this paper, we design each LDC parameters determining the sending voltage that can satisfy voltage level, decrease ULTC tap movement numbers, or increase DG introduction. Moreover, the maximum installable DG capacity based on each LDC parameters is estimated.

• Korean Institute of Interior Design Journal
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• v.13 no.2
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• pp.159-167
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• 2004

To realize the above concepts of underground space, several underground facilities are concentrated upon and around subway stations in harmony with underground pedestrian walkways. As a result, the reduction of transit time and pedestrian distance make it easy to get to an object. In this study, underground space is considered not just as pedestrian walkways, but as space for various activities and as a positive element in connection with its circumstances. The purpose of the study is to understand underground space's elements and develop more aesthetic and efficient design of the space to give mental composure and familiarity to users. The development of underground connection space is one of the methods to improve the quality of the whole downtown area. This paper studied the general characteristics of connection space and space improvements after spot inspections and suggested several aspects useful for substantial design as essential data for development of underground connection space.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.28 no.9
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• pp.28-34
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• 2014

A claw pole stepping motor is widely used in various fields such as a compact optical disk drive, computer peripherals, digital cameras, office automation(OA), handheld mobile devices, because it has the suitable structure for compact motor. However 3D analysis is essential for design of Claw pole stepping motor because of axial flux path. Thus, in general, it takes a lot of time in the design of Claw pole motor. In this paper, magnetic equivalent circuit considering axial flux was proposed to reduce design time of Claw pole motor and we has designed by using the magnetic equivalent circuit. In addition, in oder to verify the study, design model was verified by 3D FEM simulation and experiment.

• Journal of the Korean Institute of Rural Architecture
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• v.13 no.4
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• pp.133-140
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• 2011

The Government's investment for rural issues and continues to increase in the rural village developed and emerging. Among these development plans in the amenity characteristics analysis is an essential element of working. In this study, Chungbuk Yeongdong sihanggol in sub-analysis of the resources and amenities to the regional characteristics you want to animate a plan was developed. Analysis of city attractions as well as through seeking to gain a competitive edge and to reflect the resident physicians conducted a SWOT analysis. Major strategic include utilizing the strengths sihanggol opportunities for the many ways to leverage the resources and sub-concepts derived from detailed planning to detailed business information presented.

• Proceedings of the KIPE Conference
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• 2017.11a
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• pp.95-96
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• 2017

A three-level inverter is widely used thanks to its excellent performances, but the voltage may fluctuate at the neutral point of the split DC-Link. Neutral point voltage fluctuations cause inverter performance degradation and switching element damage, so the neutral point voltage control is essential. However, the neutral point control can be also limited by modulation index and power factor. This paper analyzes the limitation of the neutral point voltage control due to the limitation of zero-sequence voltage, and suggests a method to determine the region where the PWM has to be changed for a better neutral point control.