• Proceedings of the KWS Conference
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• 1992.10a
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• pp.122-124
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• 1992

• The Journal of Korean Philosophical History
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• no.35
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• pp.131-164
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• 2012

This paper is to make a generalization of Keyongyegimunrok(經義記聞錄) by Namdang Han Wonjin(1682~1751) whose historical positions of philosophy were contained, and to examine its established periods and the summaries of Ligi-Simseong Doseol(理氣心性圖說, illustrated Account of principle, Vital force, and Heart-mind) given in Appendix of Chap. 6. Total seventeen explanatory diagrams cover over the theory of principle and material force, theory of Heart-mind, theory of cultivation. These explanatory diagrams were produced systematically and easily to understand the pursuits of study, so-called Ho-hak(湖學), since Namdang becoming a member of the Yellow River(黃江) school. The philosophical argumentations of Namdang was usually succeeded by the orthodox stream of Ki-ho(畿湖) School transmitted from Ii, Song Si-yeol, Gwon Sang-ha. Ligi-wollyu-do(理氣源流圖), Ligi-dongjeong-do(理氣動靜圖), irwon-bunsu-do(一原分殊圖, 4 diagrams) are diagrams equivalent to Ki-ho School's ontology. As Ki-ho School's theory of Heart-mind, there are Seongjeong-hoenggan-do(性情橫看圖), Seongjeong-sugan-do(性情竪看圖), Seongjeong-chonghwoi-do(性情總會圖), Oseonghoju-do (五性互主圖), Oseongchubon-do(五性推本圖), Simseongmyohap-do (心性妙合圖), Simseongiji-do(心性二岐圖), Jungyongcheonmyeong-do(中庸天命圖), Insim dosim-do(人心道心圖), focusing on Simtongseongjeong-do(心統性情圖), and last diagram is Wihakjibang-do(爲學之方圖), which adapted from the diagram established by Ii and Song Si-yeol. The significance of Keyongyegimunrok(經義記聞錄) is comprehensive of the pursuits of the Yellow River school's studies, and provides evidence of a leading figure in Ho-hak.

• The Journal of Korean Philosophical History
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• no.37
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• pp.71-96
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• 2013

This research is a discussion in critical viewpoint about Han WonJin's philosophical thoughts. As everyone knows, Han WonJin emphasizes the difference of nature between human and animal, so as to try to be hardened human-being's dignity and value. But, his theoretical system can't back that purpose. First, he focused on the real world and maintains "GiseonLihoo[氣先理後]". It means that the ontological sense of Li can be unmake by Gi, then Li can't be the ultimate basis of everything under the sun and pure good moral principle. This concept is perfectly realized in the theory of Mind-Nature, the realistic nature of everything under the sun is a thing that Li had been unmade by Gi, also formed in mixing with disposition. The practical and concrete Mind only has a cognitive function which had already been decided it's superiority. How can we practice moral behavior, can secure human-being's value and dignity in being based on these Mind-Nature?

• Laser Solutions
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• v.7 no.2
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• pp.27-38
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• 2004

Laser remelting of surface of cobalt-based hardfacing alloy can eliminate impurities and cracks and improve the wear resistance. In this present study, Stellite ${\sharp}6\;and\;{\sharp}21$ harfacing alloys were remelted by a 3kW CO2 laser. Hardness distribution and microstructures in the laser remelted zone was investigated. Our results showed that in proper laser parameters laser remelted surface of hardfacing alloy had more refined microstructure and more increased micro-hardness than the base material.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.48 no.4
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• pp.38-48
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• 2011

Block based LCD backlight nonideality and crosstalk compensation methodologies are proposed based on the analysis of backlight profiles and image pixel homogeneity. Large computation complexity required in the conventional compensations is minimized without the degradation of image qualities by optimizing image block size, image area inside the block to be excluded from the compensation computation and the required backlight range to be computed. The optimization results of computation complexity as well as image qualities are verified for the proposed compensation by real image data simulations.

• Proceedings of the KSME Conference
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• 2008.11a
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• pp.56-60
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• 2008

Laser cladding technology was studied as a method for upgrading the present repair procedures of damaged tubes in a nuclear steam generator and Doosan subsequently developed and designed a new Laser Cladding Repair System. One of the important features of this newly developed Laser Cladding Repair System is that molten metal can be deposited on damaged tube surfaces using a laser beam and filler wire without the need to install sleeves inside the tube. Laser cladding qualification tests on the steam generator tube material, Alloy 600, were performed according to ASME Section IX. Residual stress analyses were performed for weld metal and heat affected zone of as-welded and PWHT with SYSWELD software.

• Proceedings of the KWS Conference
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• 2007.11a
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• pp.196-198
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• 2007

Laser cladding technology was studied as a method for upgrading the present repair procedures of damaged tubes in a nuclear steam generator and Doosan subsequently developed and designed a new Laser Cladding Repair System. One of the important features of this newly developed Laser Cladding Repair System is that molten metal can be deposited on damaged tube surfaces using a laser beam and filler wire without the need to install sleeves inside the tube. Laser cladding qualification tests on the steam generator tube material, Alloy 600, were performed according to ASME Section IX.

• Laser Solutions
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• v.3 no.1
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• pp.12-20
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• 2000

The nuclear steam generators are subjected to corrosion environmental condition during operation that can result in stress corrosion in the tube wall. If any tube wall degradation is recognized, the tube must be repaired by plugging or sleeving. For the sleeving repair, Nd : YAG laser welded sleeving technology is one of the most promising when considering radioactive working conditions in the nuclear power plant. In this paper, the laser welding characteristics of steam generator tube and sleeve materials are investigated. The effects of average laser power, laser energy, welding speed, pulse duration and frequency are evaluated. Based on these results, Nd : YAG laser welded sleeving repair was applied to the degraded steam generator tubes in real environment.

• Journal of Welding and Joining
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• v.11 no.1
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• pp.62-72
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• 1993

Recently there is an increased interest in joining of ceramics to metals and brazing now an accepted method of joining for a wide variety of ceramic to metal combination. The present research work is aimed at establishing the basis of the metal-ceramic joining of $Al_{2}$O$_{3}$ to STS 304 with using Cu-7.5wt% Zr insert metals. Also the microstructures of the brazed joints were observed by using optical microscope and SEM and the reaction products were analyzed by using EDX, WDX and XRD. As a result, the following findings were obtained. The reaction layers of the brazed joints of $Al_{2}$O$_{3}$ to STS 304 are composed of four layers at the bonded interlayer. Double reaction layers are formed at the interface of $Al_{2}$O$_{3}$ insert metal. Layer I was composed of ZrO$_{2}$ particles, Fe-Cr-Ni compounds in Cu matrix, while layer II ZrO$_{2}$ band phase containing Fe-Cr-Ni compounds.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.45 no.11
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• pp.21-28
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• 2008

In this paper, we suggest an analytical model that can derive the I-V characteristics in the saturation region of a short channel GaAs MESFET. Instead of the pinch-off concept that has been used in the conventional models we can derive the two-dimensional potential in the depletion region in order that the velocity saturation region cannot be pinched-off and the current continuity condition can be satisfied. Obtained expression for the velocity saturation length is expressed in terms of the total channel length, channel doping density, gate voltage, and drain voltage. Compared with the conventional channel length shortening models, the present model seems to be considerably accurate and more reasonable in explaining the Early effect.