• 한국환경복원기술학회지
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• 제1권1호
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• pp.133-140
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• 1998

The following conclusions are based upon data collected and visual observations made during the performance of the tests : 1. The performance of the erosion control products tested was for a particular set of conditions, and may be expected to differ if any or all of the test parameters were to be changed. If even just one parameter is changed from one test to the next, the results can be expected to be different. 2. Due to the fact that only two replications of each product were tested, we believe that the results presented herein are indicative only and not conclusive. 3. The ECB SC produced the least amount of soil erosion followed by ECB S, ECB C, and Coir No. 2, in that order. 4. All of the erosion control blankets tested significantly reduced soil erosion rates with respect to the bare soil controls. 5. The ECB S produced the smallest water runoff rate, followed closely by ECB SC. Next in order were ECB C and Coir No. 2. 6. All of the erosion control blankets reduced the water runoff rate with respect to the bare soil control. 7. Mesh 2cm There was not much difference in plant height for the four erosion control blankets and the bare soil control plots. the ECB S produced slightly taller plants than the rest of the materials tested. 8. The four erosion control blankets(ECB C, ECB SC, ECB S, and Coir No. 2) produced a larger plant mass than the bare soil plots. The difference between the plant mass for the four erosion control blankets, however, is minimal. 9. The ECB C produced the least percentage of lost seed and the largest percentage of germinating seed. 10. The ECB SC had the second smaller percentage of seed lost, followed closely by ECB S, and then by Coir No. 2. 11. All erosion control blankets had a smaller percentage of seed lost than the bare soil control plots. 12. The ECB C had the second largest percentage of germinating seed, followed closely by ECB SC and Coir No. 2. 13. All erosion control blankets had a larger percentage of germinating seed than the bare soil control plots. 14. The ECB C had the smallest percentage of non-germinating seed, followed by ECB S, Coir No. 2, and ECB SC, in that order. 15. All erosion control blankets had smaller percentages of non-germinating seed than the bare soil control plots.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 추계학술대회 논문집 Vol.17
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• pp.563-566
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• 2004

We have studied a electrically controlled birefringence (ECB) mode for field sequential liquid crystal display (FSLCD). We measured response time of the ECB mode. The ECB mode exhibiting fast response time, high transmittance, low operating voltage and adequate viewing angle. The positive liquid crystal (LC) is better than negative LC on dielectric anisotropy, birefringence and rotational viscosity. So that, the ECB mode is one of strongest candidate for FSLCD application.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2005년도 하계학술대회 논문집 Vol.6
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• pp.483-484
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• 2005

The field sequential liquid crystal display (FSLCD) does not need a color filter so that it is suitable for high resolution display. However, FSLCD has a drawback which requires a fast response time of sub-5 ms. We have studied the FSLCD with electrically controlled birefringence (ECB) mode. The ECB mode exhibits fast response time, high transmittance, low operating voltage and adequate viewing angle with a help of optical compensation films. In this paper, we present electro-optic characteristics of the ECB mode using a discotic film.

• 한국미생물·생명공학회지
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• 제47권4호
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• pp.509-514
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• 2019

본 연구에서는 제주연안에 서식하는 감태에서 폴리페놀을 추출하고 남은 가공부산물을 이용하여 가축의 생산성 및 면역력을 증진할 수 있는 소재를 개발하고자 하였다. 흰쥐를 이용하여 감태 가공부산물을 0.1% 첨가 급여한 그룹에서 체중 증가량과 맹장 내 Lactobacillus spp.의 유의한 증가가 확인되었다. 또한, 혈액 분석 결과 일반적 혈액분석항목에서는 변화가 없었으나, IgA와 IgG 항목에서 유의한 증가가 나타났다. 흰쥐의 전체적인 체중 증가와 더불어 비복근을 절개하여 근육 성장 관련 유전자 발현을 분석한 결과, MyoD, Myogenin, IGF-1의 유의한 증가가 확인되었다. 감태 가공부산물 0.1% 급여 효과가 면역력을 증진하고, 근육성장에 기여하여 체중증가에 직접적으로 영향을 준 것임을 시사한다. 최종적으로 감태 가공부산물을 폐기하지 않고 성분 분석 및 효능 평가를 통해 생산성 증가용 기능성 사료첨가제로의 가능성을 확인하였으며, 향후 양계, 양돈 등 다양한 축종을 대상으로 생산성 평가 및 생리기능 평가가 수반되어야 할 것이다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2005년도 춘계학술대회 논문집 디스플레이 광소자 분야
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• pp.109-113
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• 2005

We have studied a field sequential liquid crystal display (FSLCD) with electrically controlled birefringence (ECB). The ECB mode exhibiting fast response time, high transmittance, low operating voltage and adequate viewing angle. The positive liquid crystal (LC) is better than negative LC on dielectric anisotropy, birefringence and rotational viscosity. Because $K_{11}$ value out of the elastic coefficient of LC is also larger than $K_{22}$ value, decay time of VA-ECB is advantage. However, the transmittance & response time reduced with decreasing the cell gap. This drawback can be overcome by using LC with high ${\Delta}n$ but VA-ECB is occured loss of light efficiency because the $\gamma$ value increased by high ${\Delta}n$ of LC. Consequently, the HA-ECB mode is one of strongest candidate for FSLCD application.

• Journal of Microbiology and Biotechnology
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• 제19권12호
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• pp.1665-1671
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• 2009

Anaerobic digestion sludge was cultivated in an electrochemical bioreactor (ECB) to enrich the hydrogenotrophic methanogens. A modified graphite felt cathode with neutral red (NR-cathode) was charged with electrochemical reducing power generated from a solar cell. The methane and carbon dioxide collected in a Teflon bag from the ECB were more than 80 ml/l of reactant/day and less than 20 ml/l of reactant/day, respectively, whereas the methane and carbon dioxide collected from a conventional bioreactor (CB) was around 40 ml/l of reactant/day, respectively. Moreover, the maximal volume ratios of methane to carbon dioxide (M/C ratio) collected in the Teflon bag from the ECB and CB were 7 and 1, respectively. The most predominant methanogens isolated from the CB on the $20^{th}$, $80^{th}$, and $150^{th}$ days of incubation were hydrogenotrophs. The methanogenic diversity analyzed by temperature gradient gel electrophoresis (TGGE) of the 16S rDNA variable region was higher in the ECB than in the CB. The DNA extracted from the TGGE bands was more than 95% homologous with hydrogenotrophic methanogens in the ECB, but was an aceticlastic methanogen in the CB. In conclusion, the ECB was demonstrated as a useful system for enriching hydrogenotrophic methanogens and increasing the M/C ratio of the gas product.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 추계학술대회 논문집 Vol.17
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• pp.116-119
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• 2004

In this paper, we have improved a novel (ECB) mode using tilt angle in the unique condition by hot-plate equipment. The new control of tilt angle for nematic liquid crystal (NLC) with negative and positive dielectric anisotropy on the rubbed homeotropic polyimide (PI) using baking method by Hot-plate equipment was investigated. LC tilt angle decreased with increasing baking temperature and time. Especially, the low LC tilt angle of positive type NLC $({\Delta}n>0)$ on the rubbed homeotropic PI surface by increasing temperature and time was measured. The EO characteristics of the novel ECB mode using control of tilt angle on the homeotropic surface than that of conventional OCB cell can be improved. We suggest that the developed the Novel ECB cell using control of tilt angle on the homeotropic surface is a promising technique for the achievement of a fast response time and a high contrast ratio.

• 한국정보전자통신기술학회논문지
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• 제1권1호
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• pp.67-74
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• 2008

무선 네트워크 시장이 증가하면서 가장 큰 이슈로 떠오른 것이 안전한 자료 전송과 사용자 인증에 관한 보안 문제이다. 본 논문에서는 타원곡선 알고리즘을 이용해 무선 네트워크에서 사용자가 인증서버의 신분을 인할 수 있는 상호 인증 메커니즘과 인증 서버가 사용자의 신분을 확인할 수 있는 사용자 인증 메커니즘으로 구성된 ECbA(Elliptic Curve based Authentication) 시스템을 제안하였다. 제안된 ECbA 시스템에선 인증에 키 길이가 작은 타원곡선 알고리즘을 이용함으로써 메시지 전송량을 줄이고, 연산 시간을 단축시켰을 뿐만 아니라, 기존의 인증 메커니즘인 EAP-TLS의 인증 스텝 단계를 9단계 과정에서 제안한 인증 메커니즘에서 6단계로 줄였기 때문에 통신비용이 적게 들고, 상호 인증 시간에 소요되는 시간이 기존의 인증보다 절감시킬 수 있다. 또한, 키교환 메커니즘을 사용하여 사용자 인증때마다 새로운 키를 분배하므로 안전한 통신 제공하며, 키 길이 160bit인 세션 키를 사용하므로 전수조사 공격에 안전할 뿐만 아니라 인증서버가 사용자 인증 요청을 제어하므로 DoS 공격을 방지할 수도 있다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2005년도 춘계 학술기술논문발표대회 논문집
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• pp.185-190
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• 2005

Safe, economical and environment-friendly tunnel construction are required again along with social continuous development, the importance of waterproof work that is portion that actually all of user and builder can find that is embossed by tunnel construction's one of important construction. Also, ECB (Ethylen Copolymer Bitumen) sheet that is used in existing tunnel waterproofing method (ECB waterproofing method) being black because asphalt (Bitumen) is added, by purpose that make illumination of tunnel interior brightly and scar discovery eases in sheet with coating white film, but ECB that is used present according as ECB that asphalt is added does not satisfy high tensile strength of construction field, quality standard of extension. Also ECB denigrates color of black M/B that asphalt is excepted.

• 전기학회논문지
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• 제63권12호
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• pp.1737-1741
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• 2014

The railway ECB(Eddy Current Brake) is used for high speed vehicle of railway like as TGV, ICE, JR-500 because it has stable braking force at high speed. But it is not effective at low speed and it is difficult to save energy due to the excitation of electro-magnet. Although ECB with permanent magnet is used for roller-coaster, it can not control the braking force without clutch. In this paper, the shield moving ECB with PM is proposed for application of railway vehicle. The angle of shield can be changed for various braking force. It changes the flux amount from PM, then the braking force will be reduced. The brake of 800W is simulated by using the software, "Ansoft Maxwell". The characteristics of braking will be shown by the shapes of magnet, disk and various speeds.