• The Journal of the Korean dental association
• /
• v.21 no.2 s.165
• /
• pp.141-150
• /
• 1983

• Proceedings of the IEEK Conference
• /
• 2004.08c
• /
• pp.792-795
• /
• 2004

This paper is an interference analysis from S-DAB(Satellite-Digital Audio Broadcasting) into terrestrial IMT-2000 systems intending to use the band 2630-2 655 MHz and that could be used to determine the impact of S­DAB on terrestrial IMT-2000 in the context of co-frequency sharing through the development of pfd masks.

• Proceedings of The Korean Cleft Lip And Palate Association
• /
• 1998.06a
• /
• pp.38-38
• /
• 1998

• 한국정보디스플레이학회:학술대회논문집
• /
• 2007.08a
• /
• pp.340-343
• /
• 2007

We describe the DuPont Displays full color OLED printing and materials technologies. The process is more cost-effective and scalable than thermal evaporation through shadow masks. The materials lifetime is sufficient for most portable applications and is nearing that required for stationary displays. Recently, 4.3" WQVGA displays were demonstrated.

• Proceedings of the Korean Magnestics Society Conference
• /
• 2005.12a
• /
• pp.213-213
• /
• 2005

• Polymer Science and Technology
• /
• v.24 no.5
• /
• pp.517-527
• /
• 2013

• Human Ecology Research
• /
• v.55 no.5
• /
• pp.481-490
• /
• 2017

This study considered the performing arts culture with a focus on Palgwanhoe Ceremony and various stunt-songs and dance (Baekhee-Gamoo) from the Goryeo period as well as examined the characteristics of performing arts' costume for Baekhee-Gamoo shown in Palgwanhoe Ceremony. The Baekhee-Gamoo shown in the Palgwanhoe Ceremony included acrobatics, traditions from comic dramas, puppet shows, mask plays, and four musical troupe flowers of youth in the Silla Dynasty, who excelled in beauty, bravery and the military arts (Sasun-Akboo). These were performed on a wagon ship with dragon, phoenix, and elephant animal masks (Yong-Bong-Sang-Mageosun). The characteristics of performing arts' costume for each performing arts are as follows. First, the general costume of the time was used for performing arts' costume. There were no special costumes for performing arts and it was just transformed or added for the efficiency of acrobatics. Second, the reality was improved by focusing on the historical research on costume suitable for characters and background of events in the performing arts to clearly deliver the purpose of the ceremony and quickly arouse audience's curiosity towards the performing arts' costume for the tradition of comic dramas and puppet shos in the Palgwanhoe Ceremony. Third, magical powers and symbolism were expressed through masks and performing arts' costumes. Palgwanhoe Ceremony aimed for magical powers that could protect weak human beings from threats and repel everything unfair while also symbolically showing the deified being through the performing arts' costume.

• Journal of Sensor Science and Technology
• /
• v.6 no.3
• /
• pp.237-244
• /
• 1997

A new planar-type microsensor, which had a platinum heater and a sensing layer on the same plane was fabricated on silicon substrate with stress-relieved PSG(phosphosilicate glass)/$Si_{3}N_{4}$(800nm/150nm) diaphragm. The proposed planar-type microsensor could be fabricated by simple silicon process using only 3 masks for photolithography process compared with 5 or 6 masks of the typical micro-gas sensor. The thermal properties of the microsensor from thermal simulation were compared with those of the fabricated microheater. Although there are some discrepancy between the simulation result and the result from the fabricated microheater, the thermal simulation by FEM was proved to be an useful method to evaluate the thermal properties of microheater. The sensing characteristics of the fabricated microsensor with the planar-type heater were investigated also.

• Journal of the Korean Society for Precision Engineering
• /
• v.23 no.11 s.188
• /
• pp.116-125
• /
• 2006

MEMS and LIGA technologies have been used for fabricating microstructures, but their shape is not 3D because of difficulty for preparation of many masks. To fabricate 3D microstructures, microstereolithography technology based on Digital Micromirror Device($DMD^{TM}$) was introduced. It has no need of masks and is capable of fabricating high aspect ratio microstructures. In this technology, STL file is the standard format as the same of conventional rapid prototyping system, and 3D parts are fabricated by layer-by-layer according to 2D section sliced from STL file. The UV light source is illuminated to DMD which makes bitmap images of 2D section, and they are transferred and focused on resin surface. In this paper, we addressed optical design of microstereolithography system in consideration of light path according to DMD operation and image-forming on the resin surface using optical design program. To verify the performance of implemented microstereolithography system, 3D microstructures with complexity and high aspect ratio were fabricated.

• Journal of Biomedical Engineering Research
• /
• v.16 no.2
• /
• pp.239-248
• /
• 1995

The method of increasing signal to noise ratio (SNR) in a Hadamard transform spectrometer (HTS) is multiplexing. The multiplexing is executed by a mask. Conventional masks are mechanical or electro-optical. A mechanical mask has disadvantages of jamming and misalignment. A stationary electro-optical mask has a disadvantage of information losses caused by spacers which partition mask elements. In this paper, a mixed-concept electro-optical mask (MCEOM) is developed by expanding the length of a spacer to that of lon-off mask element. An MCEOM is operated by stepping a movable mask. 2N measurements are required for N spectrum estimates. The average mean square error (AMSE) using MCEQM is equal to that using a stationary electro-optical mask without spacers for large N. The cost of manufacturing an MCEOM is lower than that of producing a conventional electro-optical mask because an MCEOM needs only (N + 1)/2 on-off mask elements whereas the con¬ventional electro-optical mask needs N on-off mask elements. There are no information losses in the spectrometers having an MCEOM.