• 한국정보디스플레이학회:학술대회논문집
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• 2006.08a
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• pp.551-555
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• 2006

A new type of diffractive spatial optical modulators, named SOM, has been developed by Samsung Electro-Mechanics for projection display and other applications. A laser display in full HD format $(1920{\times}1080)$ was successfully demonstrated by using prototype projection engines having SOM devices, signal processing circuits, and projection optics.

• 한국정보디스플레이학회:학술대회논문집
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• 2005.07b
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• pp.1195-1198
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• 2005

The improvement of efficiency is the one of the most important part in AC PDPs . To achieve high efficiency, high VUV emission efficiency and High ion induces secondary electron emission coefficient are needed. We have measured the emission spectra of vacuum ultraviolet rays and ion induced secondary electron emission coefficient of MgO protective layer in surface discharge AC-PDP with binary and ternary gas mixtures. We have investigated electro-optical characteristics of AC-PDPs to optimum gas mixture for high efficient.

• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.367-369
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• 2009

Optically anisotropic rotating balls were disposed in a monolayer, and controllably closely packed with respect to one another in the monolayer. The close packed monolayer configuration provided high brightness and improved contrast. The monolayer rotating ball display (MRB) electrically demonstrated a fast response time of approximately 40 msec at a voltage of 30 V. Measurements of the rotation as a function of voltage led to surface charge density for the balls in the range of 3-4 ${\mu}C/m^2$.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.10a
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• pp.611-612
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• 2006

• Korean Journal of Acupuncture
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• v.25 no.2
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• pp.33-41
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• 2008

Objectives : The aim of this study was to understand electro-physiological peculiarity in meridian and acupoints, and understand acupuncture therapy mechanism as an electro-physiological viewpoints. Methods : I reviewed the articles on the electro-physiological peculiarity of the meridian and acupoints Results and Conclusions : It has been reported that meridian and acupoints have high-electrical conductivity and row-electrical resistance. On this scientific basis, to understand the mechanism of acupuncture therapy, I made some hypotheses. At first, there is electro-property in meridian and acupoint. The second, energy flowing in meridian is related with electro-property. The third, there is electronic interaction between practitioner of acupuncture therapy and patient receiving acupuncture therapy. The forth, acupuncture effects which may be expressed by the electro-charge capacity is transfered between practitioner and patient via acupuncture. Electro-charge induced via acupuncture in practitioner may be an important factor that initiate the electro-charge changes in meridian and acupoint of patient.

• Journal of Acupuncture Research
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• v.25 no.4
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• pp.11-29
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• 2008

Objectives : The purpose of this study was to observe the effects of acupuncture and electro-acupuncture at $LI_4$ on intestinal motility in rat. Methods : We made over-activated state of intestinal motility with carbachol and suppressed state of intestinal motility with loperamide in rat and carried out needle retention acupuncture, low frequency electro-acupuncture and high frequency electro-acupuncture at $LI_4$ or sham point in rat devided into pre-treatment group and post-treatment group. and we resulted as follow for measuring charcoal travel rate to observe intestinal motility. Results : 1. Any of needle retention acupuncture, low frequency electro-acupuncture and high frequency electro-acupuncture at $LI_4$ have no significant influences on intestinal motility of rat in normal state. 2. All of the pre-treatment and post-treatment of needle retention acupuncture, low frequency electro-acupuncture and high frequency electro-acupuncture didn't significantly decrease intestinal motility in rat which over-activated with carbachol. 3. Pre-treatment of needle retention acupuncture and high frequency electro-acupuncture significantly increased intestinal motility in rat which suppressed with loperamide. 4. Post-treatment of needle retention acupuncture, low frequency electro-acupuncture and high frequency electro-acupuncture significantly increased intestinal motility in rat which suppressed with loperamide. Conclusions : These results suggest that acupuncture on $LI_4$ have preventive effect and therapeutic effect on suppressed intestinal motility, and especially high frequency electro-acupuncture is more effective.

• 한국정보디스플레이학회:학술대회논문집
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• 2006.08a
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• pp.906-909
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• 2006

The secondary electron emission coefficient $({\gamma})$ of the cathode is an important factor for improving the discharge characteristics of AC-PDPs because of its close relationship to discharge voltage. In AC-PDPs, MgO is most widely used as a surface protective layer. In this experimental, we have investigated the electronic structure of the energy band structure of the MgO layer responsible for the high ${\gamma}$. The MgO layers have been deposited by electron beam evaporation method, where the $O_2$ partial pressures have been varied as 0, $5.2{\times}10^{-5}$ torr, $1.0{\times}10^{-4}$ torr, and $4.1{\times}10^{-4}$ torr, in this experiment. It is noted that work function that is energy gap between surface and first defect level of MgO layer has the lowest value for the highest O2 partial pressure of $4.1^{\ast}10^{-4}$ Torr.

• Ceramist
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• v.10 no.3
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• pp.15-27
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• 2007

Fabrication and electro-optic applications of glass optical fibers were reviewed. Theoretical description on the electro-optic Kerr effect in glass optical fibers, particularly for the second-order optical nonlinearity was given. Fabrication procedure and the characterization of the nonlinear electro-optic fibers with internal electrodes were described. Several electro-optic devices based on the polarimetric cells made by the nonlinear optical fibers with internal electrodes were also discussed with the experimental results on the electro-optic effect.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2006.07a
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• pp.482-482
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• 2006

• 한국초전도학회:학술대회논문집
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• v.13
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• pp.85-85
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• 2003