• Proceedings of the SAREK Conference
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• 2004.06a
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• pp.130-130
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• 2004

• Medical Lasers
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• v.10 no.2
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• pp.96-105
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• 2021

Background and Objectives Skin aging is reportedly associated with regulation in collagen and elastin synthesis. This study investigated the potential of combining light-emitting diode (LED) treatments using a 630-nm and 850-nm LED with simultaneous microcurrent application. Materials and Methods The dorsal skin of female pigs was treated with a home-use device. We examined the treatment effects using photography, thermocamera, microscopic pathology, and histological examination to determine the mechanism of action, efficacy, and safety of the procedure. A histological observation was performed using hematoxylin and eosin, Masson's trichrome, Victoria blue, and immunohistochemical staining. We also used the Sircol soluble collagen and elastin assay kit to measure the amounts of collagen and elastin in the porcine back skin tissue after 2 and 6 weeks. Results Evaluation by visual inspection and devices showed no skin damage or heat-induced injury at the treatment site. Histological staining revealed that accurate treatment of the targeted dermis layer effectively enhanced collagen and elastin deposition. Collagen type I, a protein defined by immunohistochemical staining, was overexpressed in the early stages of weeks 2 and 6. Combined therapy findings showed the superior capability of the 630-nm and 850-nm LED procedures to induce collagen; in contrast, elastin induction was more pronounced after microcurrent treatments. Conclusion The home-use LED device, comprising a combination of 630-nm and 850-nm LEDs and microcurrent, is safe and can be used as an adjunctive treatment for self-administered facial rejuvenation.

• Proceedings of the SAREK Conference
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• 2004.11a
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• pp.71-71
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• 2004

• 한국정보디스플레이학회:학술대회논문집
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• 2004.08a
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• pp.231-235
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• 2004

High performance 42 inch XGA PDP with high luminance of 1,000 cd/$m^2$ has been developed using high efficient electrode structure, discharge gas and closed barrier ribs. For high speed addressing with single scan technique, address discharge time lag was reduced over 40% with FAST driving scheme and new materials. High dark room contrast ratio of 5,000 : 1 was achieved and picture quality was improved using new algorithm for eliminating false contour and improving gray level linearity.

• Proceedings of the SAREK Conference
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• 2007.06a
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• pp.133-133
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• 2007

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.1547-1550
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• 2008

We are suggesting a new index to represent the performance of PDP, such as Specific Performance Index (SPI) that includes luminous efficacy and panel reflectance. High Xe gas mixture and low panel capacitance are well known as key factors to improve luminous efficacy of PDP [1]. However, higher driving voltage and longer discharge time lag is an obstacle when applying these technologies. Modified cell design, new materials and driving waveform enable us to overcome these obstacles. High efficient phosphor is also a key material to improve luminous efficacy. Phosphors coated with pigment are used to reduce panel reflectance. High performance 50-inch HD PDP with luminous efficacy of 2.3 lm/W has been developed.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.04b
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• pp.1471-1474
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• 2002

광대역 무선 이동 서비스의 사용자 요구가 증대됨에 따라 기존에 서로 다른 제품군이라고 생각했던 통신 서비스간의 충돌이 예상되고 있다. 무선랜과 기존 이동 통신시스템의 진화본인 HDR, 그리고 스마트 안테나 기술로 유명한 ArrayComm 에서 새롭게 내놓은 I_Burst 가 광대역 무선 이동 서비스 시스템으로 고려되고 있다. 본 논문에서는 기존의 무선랜을 이용한 시스템의 장, 단점을 정리하고 새롭게 제안된 i_Burst의 기술적 특징과 기존 시스템과 대비되는 장점들을 정리하고 있다.

• Journal of Digital Convergence
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• v.12 no.2
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• pp.193-202
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• 2014

According to change of business environment, the company has required not only profit but also social responsibility for profitable growth. However, these changes are not only applies to the company. Company's internal stakeholders and social systems sub-elements of the union was forced to respond to these changes, too. However, research has not focused yet USR until now, It's very rare USR and introduction of USR and Case of USR. But The union must meet a the stakeholders such as nonunionist, county, as well as union members. This study looked at the USR Case of LG Electronics Union which is a leader in this filed. LG Electronics Union had accepted the USR in 2010, LG Electronics Union led innovation and change of labor movement and pushed ahead with USR such as service to community and vulnerable, refrain from strike, environmental protection. and LG Electronics Union spread the USR to overseas and domestic. Through the LG Electronics Union's USR Case, this study seek the new labor movement.

• Proceedings of the Korean Vacuum Society Conference
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• 2004.08a
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• pp.91-91
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• 2004

• Proceedings of the SAREK Conference
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• 2004.11a
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• pp.70-70
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• 2004