• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2002.04a
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• pp.266-272
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• 2002

High-speed machining is one of the most effective technology to improve productivity. Because of the high speed and hugh fried rate, high-speed machining can alive great advantages for the machining of dies and molds. This paper describes on the improvement of machining accuracy in high-speed machining. Depth of cut, feed rate and spindle revolution are control factors. The effect of the control factors on machining accuracy is discussed fur the results of surface roughness and machining error in Z-direction of the high speed machining.

• Korean Institute of Interior Design Journal
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• v.13 no.4
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• pp.56-65
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• 2004

Contemporary Architecture is showing many aspects on the ground of ecological paradigm, while, searching for a new architectural direction to make importance of environment that has been still little accounted of a subject of discussion. And 'sustainability'will become a central concept of a Contemporary architectural topic, continuously. With a demand of the time, ecological inclinations have been started to develop a collective low-rise housing project. It is going to expands several fields, but for reasons of social economic activity for human fundamental being, potentialities of basic problem solution are enough for ecologyㆍenvironment, but distinct direction and measures are still not obvious conditions. This study is for healing restoration in global environment, with architectural approach, through analyzing relation between ecological architectural space and nature, and abstracts various inter-relational aspect's specific character. the purpose of this study is another approach of intimate relation of ecological architecture and nature. Therefore, this study is significant to be on the search for a start to suggest a new point of view to ecological architectural space.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2002.11b
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• pp.140-145
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• 2002

In high-capacity disk drives with ever-growing track density, the allowable level of position error signal (PES) is becoming smaller and smaller. A substantial portion of the PES is caused by disk vibration. This can be reduced by using a head gimbal assemblies (HGAs) that do not confine the slider movement to the vertical direction to disks, but allow movement to the radial direction of disks with respect to disk vibration. Several types of HGAs are proposed for such radial motion of the slider. Experimental results show that the PES levels are reduced by the proposed HGA-design concepts.

• Korean Institute of Interior Design Journal
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• v.14 no.5 s.52
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• pp.159-166
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• 2005

This study is focused on Resider's Preference of Residential Space to improve Residence Unit Plan. Three Rental Housing Complexes in Jeju which supplied by Korea National Housing Corporation(KNHC) were selected for more detailed Resider's Preference research, which were constructed within 5years. Questionnaire of Total 360 sheets were distributed for each Rental Housing Complexes and total 299 sheets were returned. The results of research are as the followings. Generally satisfaction of environment and living area of home is not high. And also it seem that many residers want to live in housing of average 25.87 pyeong in housing scale. In view and direction of housing Especially, many residers tend to select housing that view is better than direction. With based on like this results, it is proposed housing plan's develop and political supports reflected Jeju's culture condition, life style, climate and so on.

• 한국정보디스플레이학회:학술대회논문집
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• 2003.07a
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• pp.130-133
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• 2003

Vertical Colour Selection (VCS) is an option for slim CRTs with increased sharpness and brightness. The direction of self-convergence of the DY is changed to vertical in order to obtain better spot uniformity, but the line scan direction remains horizontal. Hence, no video conversion is needed, contrary to transposed scan. In this paper we address two issues: First, there is a high risk of moire, since the scan lines and the phosphor stripes are parallel. We propose a feedback mechanism guiding the electron beams towards the middle of the mask slots. As positive side effects, the brightness is improved and the shadow mask can be made of a cheap type of steel. Secondly, VCS deflection coils have to satisfy different requirements than coils in ordinary CRTs. We discuss the design rules for self-convergent VCS coils and present simulation results.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2009.04a
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• pp.593-598
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• 2009

In this study we present results for the design of ground test system for 4 degree of freedom(DOF) control test is one of the smart UAV ground test. This system is equipped with real smart UAV and Z direction DOF and 3 direction rotation DOF, Ensuring safe operation of the Smart UAV is a top priority. To this end, it is required to do structure analysis and test verification to confirm the design margin and safety. Based on the analysis, the ground test system has been redesigned to meet the structural conditions.

• Journal of the Korean Society for Precision Engineering
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• v.30 no.3
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• pp.266-270
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• 2013

Automatic tool changer(ATC) is typically provided to a machine tool to improve the efficiency of the machine tool significantly by saving time in moving, switching, installing and storing tools as well as adjusting a calibrating the machine tool. In this study, technical trend of machine tools automatic tool changer are analyzed by patent mapping. And future development direction of automatic tool changer has suggested. The analysis is carried out by using problem solution map for the applied patent during 2000 and 2010 in USA, Japan, Europe and Korea.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.32 no.9
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• pp.796-803
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• 2008

Ultrasonic testing uses the directivity of the ultrasonic wave, which propagates in on direction. The directivity is expressed as the relationship between the propagate direction and its sound pressure. The directivity of an ultrasonic wave is related to the choice of probe arrangement, testing sensitivity and scanning pitch and correct measurement of defect size and location. This paper describes on the directivity measurement of ultrasonic wave using the visualization method. The directivity of shear wave emitted from the angle beam transducer were constant during propagation. The difference of directivity was existed between 2 MHz and 4 MHz angle beam transducers. When these experimental results were compared with the theory which was based on the continuous wave, it showed good agreement with theoretical directivity on the principal lobe.

• Journal of the Ergonomics Society of Korea
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• v.29 no.4
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• pp.553-561
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• 2010

This paper discusses the next direction for user experience design to keep pace with an ongoing IT paradigm shift, particularly focused on UX standardization activity contributing to reinforcement of brand power and customer loyalty. The paper introduces a model that identifies four levels of UX standardization and a key concept called "sustainable UX ecosystem" as its top level. It argues that in the new IT paradigm the fourth level of UX standardization, the sustainable UX ecosystem, is the next direction user experience must head towards.

• Korean Institute of Interior Design Journal
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• no.41
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• pp.3-10
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• 2003

The purpose of this study was to analyze the problems of the existing interior architecture connection qualification and propose the desirable direction of development. To do this, this study suggested basic materials for the connection between the qualification for interior architecture and practical business, and for an efficient qualification. For methods, first, this study analyzed the flow and the ratio of successful applicants of the qualification of interior architecture in order to consider problems. Secondly, this study grasped the composition of examination. Thirdly, this study examined the changes of the questions in standards. Fourth, this study investigated overseas examples. In addition, this study conducted a questionnaire for professionals engaging in practical business in order to contribute for establishing the desirable frame of qualification of interior architecture through the analysis and comparison of the results.