• Proceedings of the KIEE Conference
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• 2002.07d
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• pp.2111-2113
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• 2002

This paper proposes the design of PI controller using real-coding genetic algorithm showing a good performance on convergence velocity and diversity of population among evolutionary computations. To evaluate the proposed method's effectiveness, we apply the proposed GA-PI controller to the speed control of an actual DC servomotor system. The experimental results show that GA-PI controller has the better control performance than PI controller in terms of settling time rising time and overshoot.

• Journal of Plant Biology
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• v.29 no.4
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• pp.275-283
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• 1986

Inoculation of carrot discs with Agrobacterium rhizogenes harboring Ri plasmid resulted in transformation of cells, as revealed by the tumors and hairy roots arising from them. Measurements of IAA content using HPLC indicate that it is higher in tumors and inoculated tissues than in uninoculated tissue. A lot of meristemoids and vessel elements formed I tumor tissue and the hairy roots differentiated from meristemoids. IAA content in tumor tissues is decreased with hairy root and vessel elements formation from them. Formation of wound callus in uninoculated tissues resulted on wound healing but no formation of vessel elements and hairy roots. Tumor tissues show continuous growing on hormone free medium.

• Proceedings of the Korea Concrete Institute Conference
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• 2005.05a
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• pp.135-138
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• 2005

Since a ductile coupled shear wall system is the primary seismic load resisting systems of many structures, a coupling beams of these system must exhibit excellent ductility and energy absorption capacity. In this paper, the seismic response of coupled shear wall system is discussed. It includes that the evaluation of the degree of coupling between the shear walls and the coupling beams. It is demonstrated through a review of experimental investigations of coupling beam behavior that often the coupling beam ductility demand exceeds the expected available ductility. As a result, it is possible that coupled shear wall system will not behave as desired in the course of a significant seismic event. Limits to the allowable degree of coupling are proposed as a remedy to this apparent deficiency.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08a
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• pp.878-881
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• 2007

Refractive index of glasses is important to develop a photosensitive paste for barrier rips in PDP. We investigated the refractive index and dielectric constant of glasses by contents of silica in $B_2O_3-Al_2O_3-SiO_2$ glasses. It is confirmed that the refractive index of the glass system is changed by the composition of glasses

• Bulletin of the Korean Chemical Society
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• v.26 no.6
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• pp.913-915
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• 2005

The three new lignans 1-3 were isolated from the methanol extracts of the flower buds of Magnolia fargesii. They were elucidated as (7S,8R)-1-(3,4-dimethoxyphenyl)-2-O-(2-methoxy-4-omegahydroxypropylphenyl) propane-1,3-diol, (7S,8S)-1-(4-hydroxy-3-methoxyphenyl)-2-O-(6-hydroxy-2-methoxy-4-omegahydroxypropylphenyl) propane-1,3-diol, and [tetrahydro-4-hydroxy-2-(3,4,5-trimethoxyphenyl)furan-3-yl]methyl 3,4-dimethoxy benzoate by spectral analysis.

• Journal of the Korea Safety Management & Science
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• v.12 no.3
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• pp.135-143
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• 2010

본 연구에서는 대기오염물질인 유해 황산화물 가스를 이산화티탄 촉매 반응기와 연면 방전 반응기를 조합한 반응기에서 플라즈마 방전반응에 의하여 주파수 변화, 체류시간, 전극의 굵기, 첨가 모의가스 등의 공정 변수를 변화 시켜 분해제거 실험을 하였다. 실험 결과 황산화물의 분해제거 실험에서 주파수 10kHz에서 소비전력 19W에서 분해제거율은 99%이었으며 이산화티탄 촉매반응기를 부착한 경우가 없는 경우보다 5%이상 증가효과가 이었다. 첨가가스로 메탄을 첨가한 경우 분해제거율이 증가하였고, 산소농도가 높아질수록 증가하였다 또한 이산화 탄소를 첨가한 경우 분해율은 감소하였다.

• Journal of Applied Reliability
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• v.9 no.3
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• pp.233-248
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• 2009

PAM(Power Amplifier Module) is the important part of a mobile phone transmitter. It amplifies the strength of signal transmitting from a mobile phone to base stations enough to resist noise or interference. In this paper reliability assessment criteria for the PAM are established in terms of quality certification test and lifetime test. The former quality certification test comprises general performance test and environmental test. Items which pass the test undergo lifetime test which guarantees the extent of mean lifetime with certain confidence.

• Annual Conference of KIPS
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• 2014.11a
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• pp.790-793
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• 2014

농촌의 많은 농장에서는 데이터 처리 및 분석 시스템에 대한 필요성을 느끼면서 지내오고 있다. 본 논문에서는 데이터베이스 시스템을 접목시켜서 기존 엑셀에서 간단한 계산만 이루어지던 농장 데이터 관리 시스템을 효율적으로 개편하여 데이터 분석 및 확인 시스템을 개발하였다. 본 연구에서 개발한 데이터 시스템을 실제 버섯농장에 설치 후 실험을 통하여 기존 방법 대비의 정확성, 실용성 그리고 신뢰할 수 있는 분석 시스템을 구축하였다.

• Proceedings of the KIEE Conference
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• 1994.11a
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• pp.249-251
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• 1994

We fabricated the sample of M-I-M with the insulating layer SiO. Refractive index of wave length, photon energy, absorption rate of SiO evaporation thin film are experimentally examined by spectroscopic Ellipsometer. The calculated equations of refractive index, absorption rate and permittivity of SiO thin film are induced. Calculated values and experimental values are compared and then mutual validity is proved.

• International Journal of Highway Engineering
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• v.15 no.5
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• pp.1-9
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• 2013

PURPOSES : This study is to develop a method to evaluate lubrication of asphalt binder using WMA additives and compare their lubrication effects on two types of WMA additives and three types of asphalt film thicknesses. METHODS : This study is based on laboratory experiments and rheological analysis of the experimental results. Testing materials are aggregate diskes, asphalt, and WMA additives. The main testing method is stress sweep test by using dynamic shear rheometer (DSR). RESULTS : Sasobit gives more lubrication effects on film thicknesses 0.2mm and under but LEADCAP does on film thicknesses over 0.3mm. CONCLUSIONS : LVE-Limit is a better parameter to discern the lubrication effects on the thin film asphalt thickness. Both Sasobit and LEADCAP WMA additives provide effective lubrication at the compaction temperature.