• Proceedings of the Korean Vacuum Society Conference
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• 1999.07a
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• pp.79-79
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• 1999

The varous techniques for fabrication of si or metal tip as a field emission electron source have been reported due to great potential capabilities of flat panel display application. In this report, 240nm thermal oxide was initially grown at the p-type (100) (5-25 ohm-cm) 4 inch Si wafer and 310nm Si3N4 thin layer was deposited using low pressure chemical vapor deposition technique(LPCVD). The 2 micron size dot array was photolithographically patterned. The KOH anisotropic etching of the silicon substrate was utilized to provide V-groove formation. After formation of the V-groove shape, dry oxidation at 100$0^{\circ}C$ for 600 minutes was followed. In this procedure, the orientation dependent oxide growth was performed to have a etch-mask for dry etching. The thicknesses of the grown oxides on the (111) surface and on the (100) etch stop surface were found to be ~330nm and ~90nm, respectively. The reactive ion etching by 100 watt, 9 mtorr, 40 sccm Cl2 feed gas using inductively coupled plasma (ICP) system was performed in order to etch ~90nm SiO layer on the bottom of the etch stop and to etch the Si layer on the bottom. The 300 watt RF power was connected to the substrate in order to supply ~(-500)eV. The negative ion energy would enhance the directional anisotropic etching of the Cl2 RIE. After etching, remaining thickness of the oxide on the (111) was measured to be ~130nm by scanning electron microscopy.

• Journal of the Microelectronics and Packaging Society
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• v.11 no.4 s.33
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• pp.23-27
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• 2004

The $Al_xTa_{1-x} (x=0.0{\~}1.0)$ alloy thin films were deposited by RF-magnetron sputtering system, and the crystal quality, surface morphology, and electrical properties were examined using XRD, AFM, 4-point probe techniques in this study. The thin films were grown according to the alloy compositions first, and the effects of film thickness and mask patterns were investigated afterwards. Also, the heating characteristics were examined by heat controller. The obtained results showed that the high electrical resistivity was obtained for Al content $x=6.63at\%$, and the even higher resistivity was accomplished for the samples with smaller thickness and narrower width. The heating temperature demonstrated the identical trend to the electrical properties, and the highest heating temperature ($400^{\circ}C$) and output power ($12.6W/cm^2$) were obtained for the sample with Al content $x=6.63\%$, film thickness d=500 nm, film width w=1.5 mm.

• Journal of the Korean Society of Costume
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• v.59 no.4
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• pp.98-110
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• 2009

Performance art is an integrated genre of different art areas, and make-up is a visual art area to give lively effects to the performance art, which makes actors and actresses changed into the characters of plays. It can be said to be a kind of deliverer of idea to help effectively understand the contents of the performance. When we are in the world abundant in various cultures and innumerable styles of expression of different countries, we should rediscover the value of the beauty of our traditional masks that have represented the emotion and thought of Han nation, which we can find in play culture of our ancestors that has kept our ancestors' value system. That's the way we can get continuous life force and competitive power of our traditional culture. The Korean traditional masks haven't only been for the prevention of bad luck and the prayer of fortune, but also well expressed Korean people's looks, features and personalities according to the roles. They are excellent artistic works in themselves, and many studies have been performed on the analyses and uses of the features of the masks in various fields due to their good expression of different cultural aspects, while the studies in the light of make-up are rarely performed. Therefore, this article aims to analyze the features of the Korean traditional masks and, by using this analysis, to present effective make-up designs in outdoor performances through a stage performance. In addition, this article also tries to present the orientation of make-up as an expression of artistic image, and to expand the expression area of make-up by using the Korean traditional masks in the light of make-up. For this purpose, I examined the related literature and the precedent study materials to find the origin and kinds of the Korean traditional masks, and analyzed the features of the masks. Furthermore, I established the make-up design plan using the material features of the Korean traditional masks by analyzing the characters in actual performance works, and presented the photos of works actually performed.

• Journal of the Korea Fashion and Costume Design Association
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• v.17 no.2
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• pp.111-124
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• 2015

This study inferred the symbolism of shaman's costume in China from shamanism and types of shaman's costume in Naje, Deokgang-hyun, Guiju-seong, China through field survey. Shamanism in China has complicated aspects due to negotiations with other culture for a long time while maintaining its own consistency based on ethnicity. Symbolism of shaman's costume in Naje, Guiju-seong, China is observed as follows. First, the shaman's costume in China appears differently from every Jangcha in relation to the position of god appearing in Jangcha when Tolosa takes the position of god as a symbol of sex and god. In Naje of China, the most important shaman's costume indicating the position of god has a unique mask for every deity. It communicates that Tolosa wearing a costume appropriate for the god of wine shall become the god in that Jangcha. Second, the shaman's costume in China has something to do with Yin-Yang and the five elements theory of Taoism as a symbol of shamanism visio of the universe and system of reason. Most of Tolosas hosting Naje are men but dress up as women by wearing Nagun looking like a skirt. Nagun is usually red, the color of Yang, which symbolizes that by wearing such costume that takes color of Yang, Tolosa expels an ominous thing by balancing yin and yang and taking god's strong power. Third, Tolosa takes an eight-breadth Nagun, as a symbol of people. An eight-breadth worn by Tolosa in Naje strengthens the spirit of union and fight of the Tujia nationality who live in Deokgang-hyun, Guiju-seong through folk legends. In this course, a symbolic meaning of the national spirit has been provided on an eight-breadth Nagun, a shaman's costume.

• Proceedings of the Korean Vacuum Society Conference
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• 2012.02a
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• pp.460-460
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• 2012

반도체 Device가 Shrink 함에 따라 Pattern Size가 작아지게 되고, 이로 인해 Photo Resist 물질 자체만으로는 원하는 Patterning 물질들을 Plasma Etching 하기가 어려워지고 있다. 이로 인해 Photoresist를 대체할 Hard Mask 개념이 도입되었으며, 이 Hardmask Layer 중 Amorphous Carbon Layer 가 가장 널리 사용되고 지고 있다. 이 Amorphous Carbon 계열의 Hardmask를 Etching 하기 위해서 기본적으로 O2 Plasma가 사용되는데, 이 O2 Plasma 내의 Oxygen Species들이 가지는 등 방성 Diffusion 특성으로 인해, 원하고자 하는 미세 Pattern의 Vertical Profile을 얻는데 많은 어려움이 있어왔다. 이를 Control 하기 인해 O2 Plasma Parameter들의 변화 및 Source/Bias Power 등의 변수가 연구되어 왔으며, 이와 다른 접근으로, N2 및 CO, CO2, SO2 등의 여러 Additive Gas 들의 첨가를 통해 미세 Pattern의 Profile을 개선하고, Plasma Etching 특성을 개선하는 연구가 같이 진행되어져 왔다. 본 논문에서 VLSI Device의 Masking Layer로 사용되는, Carbon 계 유기 층의 Plasma 식각 특성에 대한 연구를 진행하였다. Plasma Etchant로 사용되는 O2 Plasma에 새로운 첨가제 가스인 카르보닐 황화물 (COS) Gas를 추가하였을 시 나타나는 Plasma 내의 변화를 Plasma Parameter 및 IR 및 XPS, OES 분석을 통하여 규명하고, 이로 인한 Etch Rate 및 Plasma Potential에 대해 비교 분석하였다. COS Gas를 정량적으로 추가할 시, Plasma의 변화 및 이로 인해 얻어지는 Pattern에서의 Etchant Species들의 변화를 통해 Profile의 변화를 Mechanism 적으로 규명할 수 있었으며, 이로 인해 기존의 O2 Plasma를 통해 얻어진 Vertical Profile 대비, COS Additive Gas를 추가하였을 경우, Pattern Profile 변화가 개선됨을 최종적으로 확인 할 수 있었다.

• Journal of the Korean Society of Fashion and Beauty
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• v.2 no.1 s.1
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• pp.21-33
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• 2004

The main focus of this study is to provide the interrelation about the defining fashion model image by the fashion trend since 1960. This is expressed as follows, First, in the 60s'; 1) Image of innocent dolly style, Jean Shrimpton 2) Image of sexual style, Celia Hammond 3) Image of art style with charicteristic mask, Peggy Moffitt 4) Image of immature boyish style, Twiggy. Second, in the 70s'; 1) Image of natural and intelligent style, Larun Hutton 2) Image of exotic style with black beauty, Imman 3) Image of graceful and sexal style, Veruschka 4) Image of glamour and sexual style, Jerry Hall. Third, in the 80s'; 1) Image of unisexual style with power, Grace Jones 2) Image of graceful and noble style, In`es de la Fressange 3) Image of healthy and sexy style, Christie Brinkley 4) Image of sexy style with good sense, super model. And fourth, in the 90s' and now; 1) Image of glamour sexual style with self-consciousness, Claudia Shiffer 2) Image of graceful style with dignity, Christy Turlington 3) Image of asexual and androginous style, Stella Tennant), 4)Image of Twiggy style with immature and slender, Kate Moss 5) Image of new glamour style, Giseel Bundchen 6) Image of new style with unique beauty, Amber Vaiietta 7)Image of exotic style, Devon Aoki 8) Extraordinary, image of various style. The result of thir study, fashion models image have played a role in transmitting the style of fashion trend in their relevancy. Anyway it can be said that fashion models imply figurative meanings of the fashion trend.

• Journal of the Korea Institute of Military Science and Technology
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• v.23 no.3
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• pp.294-301
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• 2020

Man-In-Simulant Test(MIST) provides a test method to evaluate chemical protective equipments such as protective garments, gloves, footwear and gas mask. The MIST chamber is built to control concentration of chemical vapor that has a activity space for two persons. Non-toxic methyl-salicylate(MeS) is used to simulate chemical agent vapor. We carried out to measure inward leakage MeS vapors by using passive adsorbent dosimeter(PAD) which are placed on the skin at specific locations of the body while man is activity according to the standard procedure in MIST chamber. But more time is required for PADs and there is concern of contamination in PADs by recovering after experiment. Therefore detector for measuring in real time is necessary. In order to analyze in real time the contamination of the personal protective equipment inside the chemical environment, we have developed a wireless real-time gas detector. The detector consists of 8 gas-sensors and 1 control-board. The control-board includes a CPU for processing a signal, a power supply unit for biasing the sensor and Bluetooth-chipset for transmission of signals to external PC. All signals from gas-sensors are converted into digital signals simultaneously in the control-board. These digital signals are stored in external PC via Bluetooth wireless communication. The experiment is performed by using protective equipment worn on manikin. The detector is mounted inside protective equipment which is capable of providing a real-time monitoring inward leakage MeS vapor. Developed detector is demonstrated the feasibility as real-time detector for MIST.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38B no.10
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• pp.851-860
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• 2013

To overcome a scarcity of radio resources to mobile broadband service, the usage of TV white space gains much attraction around the world. This paper carries out an interference analysis either by performing realistic experiments or by executing statistical Monte-Carlo simulation to exploit interference probability. The results obtained from experiments are compared to those from simulations in order to clarify the coexistence of utilization of TV band devices (TVBD) in indoor circumstances. Along the execution of our experiment in the presence of DTV receiver, we apply to a variety of transmission parameters proposed in FCC for TVBD. According to experimental and simulation works, the allowable transmission powers of TVBD systems are exploited for the plausible which are coexist on the first as well as the second adjacent frequency bands. Throughout results, it can conclude that TVBD systems can be coexisted via achieving proper transmission powers depending on the locations of themselves without showing harmful interference to DTV reception.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.22 no.6
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• pp.116-126
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• 2008

This paper describes the Dual-band WLAN transmitter with 2.4[GHz], 5[GHz]. Dual-band WLAN transmitter was designed at 2.4[GHz] and 5[GHz]. The Dual-band WLAN transmitter has a amplifier which operate at 2.4[GHz] and 5[GHz] frequency and two VCO(Voltage Controlled Oscillator) or VCO has a wide scope of frequency. these problem cause a size and a power consumption, The Dual-band WLAN transmitter module was proposed to solve these. the transmitter was designed to get output signals of IEEE 802.11a's 5.8[GHz] band signal using frequency multiplication way or to act a amplifier about the 2.4[GHz] band signal of IEEE 802.11b/g, according to inputed frequency and bias voltage that a eve using single transmission block. The output spectrum get the improved specification of ACPR of 4[dB], 6[dB], 16[dB] at +11[MHz], +20[MHz], +30[MHz] offset of center frequency compared to no linearization, was satisfied to transmit spectrum mask of IEEE 802.11a wireless Lan.

• Journal of Advanced Navigation Technology
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• v.17 no.6
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• pp.693-699
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• 2013

In this paper, ${\pi}/4$-DQPSK modem according to ITU-R M.1842-1 recommendation Annex1 is investigated and simulated. At first, standardization and technical trend of VHF maritime mobile communication are introduced. The ${\pi}/4$-DQPSK modem defined in the Annex1 should support 28.8Kbps bit transmission rate within 25KHz frequency bandwidth. We describe the system model and simulation process of ${\pi}/4$-DQPSK modem transmitter and receiver design with RRC(Root Raised Cosine) transmitter and receiver filter. Then we suggest various graphical simulation results(time domain signals, constellation, power spectral density according to roll-off factor, eye diagram), and show simulated BER performance of the modem. From the simulation results, it is shown that roll-off factor of RRC filter affects to BER performance according to SNR and the designed simulation model meets the spectrum mask requirement suggested in ITU-R M.1842-1 recommendation.