• Title/Summary/Keyword: Rae

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ROBUST DESIGN OPTIMIZATION OF RAE2822 AIRFOIL UNDER OPERATIONAL UNCERTAINTY USING METAMODEL (근사모델을 이용한 RAE2822 운용 불확실성 강건최적설계)

  • Bae, H.G.;Kwon, J.H.
    • 한국전산유체공학회:학술대회논문집
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    • 2010.05a
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    • pp.60-66
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    • 2010
  • In the view of robust design optimization, RAE2822 airfoil was designed to achieve not only the maximum lift-to-drag ratio but also insensitivity of that. While the RAE2822 is flying at the cruise speed, Mach variation is considered as the operational uncertainty. In order to explore the design space, metamodels were introduced instead of consecutively computing the gradient. Also a metamodel was used to represent the sigma space. Using the metamodel, an optimum value was searched in the view of global optimization.

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Pharmacognostical Study on the Korean Folk Medicine 'Da Rae Ip' (한국 민간약 다래잎의 생약학적 연구)

  • Lee, Yu-Jin;Choi, Jeong-Ku;Park, Jong-Hee
    • Korean Journal of Pharmacognosy
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    • v.36 no.1 s.140
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    • pp.26-33
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    • 2005
  • Korean folk medicine 'Da Rae Ip' has been used to cure intestinal catarrh, stomach cancer and acute gastritis. The botanical origin of the crude drug has never been studied pharmacognostically. To clarify the botanical origin of 'Da Rae Ip', the morphological and anatomical characteristics of the leaves of Actinidia species growing in Korea and Japan; i.e. A. arguta, A. arguta var. rufinervis, A. kolomikta, A. polygama, A. rufa were studied. As a result, it was clarified that 'Da Rae Ip' was the leaf of Actinidia arguta and Actinidia polygama.

Effects of Dehydrating Agents on the Physicochemical Properties of Dried Plum (Prunus salicina L.) Slices

  • Kim, Min-Sung;Kang, Ji-Hoon;Chung, Kyung-Sook;Won, Misun;Song, Kyung Bin
    • Journal of Applied Biological Chemistry
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    • v.56 no.1
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    • pp.19-22
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    • 2013
  • Plum (Prunus salicina L.) slices were dehydrated with red algae extract (RAE) at a concentration of 30% (w/w), and the dried samples were compared with maltodextrin (MD)-treated and hot-air dried samples in terms of physicochemical properties such as rehydration ratio, ascorbic acid, microstructure, and color. The rehydration ratios and colors of RAE-treated plum slices were better than those of MD-treated and hot-air dried samples. The ascorbic acid contents of RAE-treated samples were higher and their microstructures were finer than those of MD-treated or hot-air dried samples. These results suggest that plum slices can be dehydrated with RAE without loss of quality.

Turbulent Flow Simulations on 2-Dimensional Ground Effect Part I. Verification on the Overlap Grid Method (2차원 지면 효과에 대한 난류 유동장 해석 Part I. 중첩 격자 기법 적용에 대한 연구)

  • Kim, Yoon-Sik;Lee, Jae-Eun;Kim, Eu-Gene;Kwon, Jang-Hyuk
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.35 no.8
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    • pp.661-669
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    • 2007
  • Study on the feasibility assessment for applying the overlap grid method to numerical calculations on the ground effect has been performed. The objective of the present study is to settle the problem in the grid generation process. A low Mach number preconditioned turbulent flow solver using the overlap grid and the multi-block grid methods has been developed and applied to the ground effect simulation around the RAE 101 airfoil. It has been verified that the overlap grid method not only can provide sufficiently accurate solutions but also work out the grid generation problem in the ground effect simulations.

Research on Development Plan of Native Local Food in Busan Area - Focused on Dongrae-Pajeon, Pan-fried Green Onion Pancake - (부산 지역 향토 음식의 활성화 방안에 관한 연구 - 동래파전을 중심으로 - )

  • Cho, Yong-Bum;Jung, Jin-Woo;Yoon, Tae-Hwan;Kim, So-Mi;Park, Kyong-Tae;Choi, Hyun-Mi;Kim, Kyoung-Myo
    • Culinary science and hospitality research
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    • v.13 no.4
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    • pp.19-30
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    • 2007
  • The purpose of this study was to gather useful information for establishing an efficient marketing direction by investigating the flavor, serving patterns, price and cooking method of Dong-rae Pajeon which is a native local food of Pusan area. A questionnaire was answered by 226 citizens who experienced Dong-Lae Phajeon. The study data were analyzed by frequency analysis, t-test, ANOVA, and multiple regression analysis. The findings are summarized as follows: The flavor, presentation, types of oil, and price of Dong-rae Pajeon had influence on the satisfaction of respondents. To globalize Dong-rae Pajeon, 'developing its cooking method', 'decreasing its price', and 'developing its serving patterns' should be considered.

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