• Title, Summary, Keyword: research technique

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The Study for Application of the Hot Medicinal Compress Technique of the Donguibogam ("동의보감(東醫寶鑑)"에 기재된 위법(熨法)의 활용에 대한 조사)

  • Kwon, O-Sang;Baek, Seung-Min;Kim, Sul-Gi;Choi, Sun-Mi
    • Korean Journal of Acupuncture
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    • v.28 no.4
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    • pp.137-145
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    • 2011
  • Objectives : This research dealt with the content of the hot medicinal compress technique in Donguibogam in order to develope the hot medicinal compress technique as a new therapy technique. Methods : In this research, we searched for the hot medicinal compress treatment in Donguibogam. Results : The hot medicinal compress technique mainly cures the diseases on the body surface and it can be applied to digestive troubles and gynecologic diseases. The hot medicinal compress technique is operated mainly at wound around the affected parts and it is applied to the constitutional symptom at the abdominal region. In the hot medicinal compress technique was used much more with medication, and the herbs used in the treatment consists of hot tastes and the warm characteristics. In the hot medicinal compress method with direct heating the herbs was mainly used. Conclusions : The hot medicinal compress technique is considered as treatment which can be utilized easily and it can be used an easy and useful self-treatment.

Design of 32 bit Parallel Processor Core for High Energy Efficiency using Instruction-Levels Dynamic Voltage Scaling Technique

  • Yang, Yil-Suk;Roh, Tae-Moon;Yeo, Soon-Il;Kwon, Woo-H.;Kim, Jong-Dae
    • JSTS:Journal of Semiconductor Technology and Science
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    • v.9 no.1
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    • pp.1-7
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    • 2009
  • This paper describes design of high energy efficiency 32 bit parallel processor core using instruction-levels data gating and dynamic voltage scaling (DVS) techniques. We present instruction-levels data gating technique. We can control activation and switching activity of the function units in the proposed data technique. We present instruction-levels DVS technique without using DC-DC converter and voltage scheduler controlled by the operation system. We can control powers of the function units in the proposed DVS technique. The proposed instruction-levels DVS technique has the simple architecture than complicated DVS which is DC-DC converter and voltage scheduler controlled by the operation system and a hardware implementation is very easy. But, the energy efficiency of the proposed instruction-levels DVS technique having dual-power supply is similar to the complicated DVS which is DC-DC converter and voltage scheduler controlled by the operation system. We simulate the circuit simulation for running test program using Spectra. We selected reduced power supply to 0.667 times of the supplied power supply. The energy efficiency of the proposed 32 bit parallel processor core using instruction-levels data gating and DVS techniques can improve about 88.4% than that of the 32 bit parallel processor core without using those. The designed high energy efficiency 32 bit parallel processor core can utilize as the coprocessor processing massive data at high speed.

The Effect of Rebirthing Technique on GA-based Size Optimization

  • LEE, Sang-Jin;LEE, Hyeon-Jin
    • Architectural research
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    • v.11 no.2
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    • pp.19-26
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    • 2009
  • The effect of rebirthing technique on the genetic algorithm (GA)-based size optimization is investigated. The GA mimics the principles of nature and it can gradually improve structural design through biological operations such as fitness, selection, crossover and mutation. However, premature optimum has been often detected in the generic GA with continuous design variable. Since then, the so-called rebirthing technique has been proposed to avoid this problem. However, the performance of the rebirthing technique has not been reported. Therefore, the size optimizations of spatial structures are tackled to investigate the performance of the rebirthing technique on the generic GA. From numerical results, it is well proved that the rebirthing technique is very effective to produce the optimum values regardless of the values of parameters used in the GA operations.

Employing high-temperature gas flux in a residual salt separation technique for pyroprocessing

  • Kim, Sung-Wook;Heo, Dong Hyeon;Kang, Hyun Woo;Hong, Sun-Seok;Lee, Sang-Kwon;Jeon, Min Ku;Hur, Jin-Mok;Choi, Eun-Young
    • Nuclear Engineering and Technology
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    • v.51 no.7
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    • pp.1866-1870
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    • 2019
  • Residual salt separation is an essential step in pyroprocessing because its reaction products, as prepared by electrochemical unit processes, contain frozen residual electrolyte species, which are generally composed of alkali-metal chloride salts (e.g., LiCl, KCl). In this study, a simple technique that utilizes high-temperature gas flux as a driving force to melt and push out the residual salt in the reaction products was developed. This technique is simple as it only requires the use of a heating gun in combination with a gas injection system. Consequently, $LiNO_3-ZrO_2$ and $LiCl-ZrO_2$ mixtures were successfully separated by the high-temperature gas injection (separation efficiency > 93%), thereby demonstrating the viability of this simple technique for residual salt separation.

The Development of Control & Diagnostic Technique for Digital Excitation System (여자시스템 제어 및 진단기법 개발)

  • Shin, Man-Su;Ryu, Ho-Sun;Lee, Ju-Hyun;Lim, Ick-Hun;Kim, Bong-Seok;Song, Seong-Il
    • Proceedings of the KIEE Conference
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    • pp.2597-2599
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    • 2005
  • This research is developing the technique of troubleshooting in digital excitation system of nuclear power plant. and the design technique of excitation system is thought to be advanced through this research. Especially, the development of simulator enables to accumulate digital control technique, more analysis for excitation system algorithm. etc helps to develop other nuclear power plants.

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MEASUREMENT OF $^{235}U$ ENRICHMENT USING THE SEMI-PEAK-RATIO TECHNIQUE WITH CdZnTe GAMMA-RAY DETECTOR

  • Ha, J.H.;Ko, W.I.;Lee, S.Y.;Song, D.Y.;Kim, H.D.;Yang, M.S.
    • Journal of Radiation Protection and Research
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    • v.26 no.3
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    • pp.275-279
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    • 2001
  • In uranium enrichment plants and nuclear fuel fabrication facilities, exact measurement of fissile isotope enrichment of uranium is required for material accounting in international safeguards inspection as well as process quality control. The purpose of this study was to develop a simple measurement system which can portably be used at nuclear fuel fabrication plants especially dealing with low enriched uranium. For this purpose, a small size CZT (CdZnTe) detector was used, and the detector performance in low uranium gamma/X -rays energy range was investigated by use of various enriched uranium oxide samples. New enrichment measurement technique and analysis method for low enriched uranium oxide, so-called, 'semi-peak ratio technique' was developed. The newly developed method was considered as an alternative technique for the low enrichment and would be useful to account nuclear material in safeguarding activity at nuclear fuel fabrication facility.

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A Rigorous 2D Approximation Technique for 3D Waveguide Structures for BPM Calculations

  • Han, Young-Tak;Shin, Jung-Uk;Kim, Duk-Jun;Park, Sang-Ho;Park, Yoon-Jung;Sung, Hee-Kyung
    • ETRI Journal
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    • v.25 no.6
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    • pp.535-537
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    • 2003
  • We propose a rigorous 2D approximation technique for the 3D waveguide structures; it can minimize the well-known approximation errors of the commonly used effective index method. The main concept of the proposed technique is to compensate for the effective cladding index in the equivalent slab model of the original channel waveguide from the modal effective index calculated by the nonuniform 2D finite difference method. With simulations, we used the proposed technique to calculate the coupling characteristics of a directional coupler by the 2D beam propagation method, and the results were almost exactly the same as the results calculated by the 3D beam propagation method.

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Residual salt separation technique using centrifugal force for pyroprocessing

  • Kim, Sung-Wook;Lee, Jong Kwang;Ryu, Dongseok;Jeon, Min Ku;Hong, Sun-Seok;Heo, Dong Hyun;Choi, Eun-Young
    • Nuclear Engineering and Technology
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    • v.50 no.7
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    • pp.1184-1189
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    • 2018
  • Pyroprocessing uses various molten salts during electrochemical unit processes. Reaction products after the electrochemical processes must contain a significant amount of residual salts to be separated. Vacuum distillation is a common method to separate the residual salts; however, its high operation temperature may cause side reactions. In this study, a simple rotation technique using centrifugal force was suggested to separate the residual salts from the reaction products at relatively low temperature compared to the distillation technique. When a reaction product container with porous wall rotates inside a vessel heated above the melting point of the residual salt, the residual salt in the liquid phase is separated through centrifugal force. It was shown that the $LiNO_3-Al_2O_3$ mixture can be separated by this technique to leave solid $Al_2O_3$ inside the container, with a separation efficiency of 99.4%.

An Etch-Stop Technique Using $Cr_2O_3$ Thin Film and Its Application to Silica PLC Platform Fabrication

  • Shin, Jang-Uk;Kim, Dong-June;Park, Sang-Ho;Han, Young-Tak;Sung, Hee-Kyung;Kim, Je-Ha;Park, Soo-Jin
    • ETRI Journal
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    • v.24 no.5
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    • pp.398-400
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    • 2002
  • Using $Cr_2O_3$ thin film, we developed a novel etch-stop technique for the protection of silicon surface morphology during deep ion coupled plasma etching of silica layers. With this technique we were able to etch a silica trench with a depth of over 20 ${\mu}m$ without any damage to the exposed silicon terrace surface. This technique should be well applicable to fabricating silica planar lightwave circuit platforms for opto-electronic hybrid integration.

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Development of Audio Watermarking Technique using Group Quantization (그룹 양자화를 이용한 오디오 워터마킹 기술 개발)

  • Shin Seungwon;Park Changmok;Kim Jongweon;Choi Jonguk
    • Proceedings of the Acoustical Society of Korea Conference
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    • pp.323-326
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    • 2002
  • In this paper, we propose a watermarking technique that it is possible to winnow illegal contents from scattered contents on the internet. The identification is performed using an embedded unique content ID by the watermarking technique. The proposed watermarking technique accepts A/D-D/A conversion and a lot of lossy compression such as MP3, AAC, WMA and Real Audio. Watermark robustness is enabled using group quantization, selecting watermark inserting point, and error correction code. Test results show that the correct extraction is about $90\%$ and SNR is above $50\~60dB$. The above figures means that the proposed technique is able to extract encoded information at least one more times per audio and that it is very difficult to discriminate between a watermarked audio and a original audio.

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