• Title/Summary/Keyword: T/S

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PROPERTIES OF A SEQUENCE SPACE l(s,t)

  • Kwon, E.G.
    • 대한수학회지
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    • 제35권2호
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    • pp.269-280
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    • 1998
  • Elementary properties of the sequence space l(s, t) are studied with applications to Hardy space theory.

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Cyclotetramethylene-tetranitramine의 미세 입자 제조를 위한 결정화 연구 (The study on crystallization for fine particles of Cyclotetramethylene-tetranitramine)

  • 김성일;전석근;박두곤;박근호;박소진
    • 한국응용과학기술학회지
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    • 제24권3호
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    • pp.219-232
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    • 2007
  • In T-mixer crystallization, supersaturation is generated by mixing of another solvent or non-solvent in order to reduce the solubility of the compound. Also, T-mixer is a type of continuous crystallization. In order to induce micro-mixing, two solutions were mixed rapidly by T-mixer, which formed high supersaturation. As the results, mean size of HMX crystals decreased with increasing de-supersaturation rate $(R_s)$. Eventually, HMX particles ranging from 0.5 to $5{\mu}m$ can be obtained by T-mixer crystallization. Mixing efficiency in T-mixer increased with increasing $R_s$ values. In T-mixer crystallization without surfactants, homogeneous nucleation was formed when S and $R_s$ was over 54 and $1.6{\times}10^3/sec$. In T-mixer crystallization with surfactants, homogeneous nucleation was formed when S and $R_s$ was over 26 and 7.4/sec.

청예사료를 위한 동부품종의 생육특성 및 생산성 비교에 관한 연구 (Studies on the Growth Charateristics and Productivity of Cowpea varieties for Soilage)

  • 이상무;구재윤;전병태
    • 한국초지조사료학회지
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    • 제16권2호
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    • pp.105-112
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    • 1996
  • In order to select the forage cowpea of high dry matter and protein yield, growth characteristics and yield performance of forage cowpea were investigated. The results obtained are as follows: Arn0r.g the five varieties tested, lT820-889 and lT83S-852 were top grass type, but IT830422 and lT84E-124 were short grass type. In stem diameter of soilage cowpea, IT83S-852 was the highest as 9.5mrn, but Swwon was the lowest as 7.8mm. In stem hardiness, lT84E-124 was the highest as 1.9kg/$cm^2$, but Seowon was the lowest as 0.8kg/$cm^2$. The palatability was high in the order of lT83S-852 > IT820-889 > Swwon, while IT820489 and IT 83S- 852 were lower than other varieties in 1990 and 1991 year. But palatability of cowpea was wholly lower than other soilage(Sudangrass hybrid and Soybean). In total dry matter yield and protein yield, lT820-889 and IT83S-852 were higher but IT830422 and lT84E- 124 were lower than other varieties. In conclusion, among the five varieties used, IT820-889 and lT83S-852 were higher as forage cowpea.

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IoT 환경에서 QoS 기반 서비스 조합을 위한 신뢰 평가모델 (A Trust Evaluation Model on QoS based Services Composition for IoT Environments)

  • 김유경
    • 한국소프트웨어감정평가학회 논문지
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    • 제15권2호
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    • pp.85-93
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    • 2019
  • M2M(machine-to-machine) 상호작용을 기반으로 하는 개방형의 이기종 환경에서 서비스 선택은 민감한 문제로서, IoT 장치들이 상호작용을 하기 위해 최선의 선택을 할 수 있도록 사회적 신뢰 관계의 개념을 적용해 볼 수 있다. 본 논문에서는 IoT 환경에서 사회적 신뢰 관계를 기반으로 작성된 프로파일을 이용한 조합서비스의 QoS 예측과 신뢰 수준을 평가하기 위한 방법을 제안한다. 정량적인 평가를 통한 서비스 선택이 이루어짐으로써, 보다 신뢰 할 수 있는 서비스 조합의 결과를 얻을 수 있을 것으로 기대한다.

Novel Organic Electron Injectors for the Enhancement of Lifetime, Efficiency and Reduction in Operating Voltage in OLEDs

  • Kathirgamanathan, Poopathy;Arkley, Vincent;Surendrakumar, S.;Paramaswara, G.;Ganeshamurugan, S.;Antipan-Lara, J.;Ravichandran, S.;Kumaraverl, M.;Chan, Y.F.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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    • pp.1206-1209
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    • 2007
  • Both PM-OLEDs and AM-OLEDs are now in production. However, manufacturers are still concerned about life-time, voltage drift, operating voltage and efficiency in order to develop larger displays. Most material suppliers seem to be focussing on emitters and the benefits of introducing suitable charge transporters have been largely unexplored. OLED-T has developed a novel organic electron injector (Trade Name: EI-101) which evaporates at a very low temperature of $300^{\circ}C$ as opposed to the conventional LiF which requires $580^{\circ}C$. EI-101 has been found to increase the lifetime by up to 12%, reduce the voltage drift by up to 61% and increase the efficiency by up to 15%. The material can be handled in air and in situ Q-mass spectroscopy on extended thermal evaporation has confirmed its high stability for use in mass production.

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