• Title/Summary/Keyword: ry

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The Actual Conditions of Consumers' Usage of Functional Golfwear (기능성 골프웨어의 소비자 이용실태)

  • Oh, Ry-Gong;Koo, Young-Seok
    • Fashion & Textile Research Journal
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    • v.12 no.2
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    • pp.179-187
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    • 2010
  • The purpose of this study was to investigate the actual conditions of consumers' usage of functional golfwear which is widely used in the current sportswear market. The study was carried out on 225 golfers in Busan and KyungNam area based on the demographics such as gender, age, occupation, and income. The collected data was processed with SPSS 14.0 program using frequency analysis, reliability analysis, t-test, and ANOVA. In the results of the analysis, golfers did not show high reliability and satisfaction on the functional golfwear. In the results of the most function-required golfwear items, there were shirts, pants, footwear, gloves, windbreaker, innerwear etc. in order. Most of golfers answered that the function of golfwear was required for pleasant and comfort golf activity. Therefore, it is necessary for golfwear makers to develop consumer-oriented golfwear products which are reliable and satisfiable to golf consumers.

A Nonlinear Low-Reynolds-Number k -$\varepsilon$ Model for Turbulent Separated and Reattaching Flows (난류박리 및 재부착 유동의 해석을 위한 비선형 저레이놀즈수 k -$\varepsilon$ 난류모형의 개발)

  • 박태선;성형진
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.19 no.8
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    • pp.2051-2063
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    • 1995
  • An improved version of nonlinear low-Reynolds-number k-.epsilon. model is developed. In this model, the limiting near-wall behavior and nonlinear Reynolds stress representations are incorporated. Emphasis is placed on the adoption of Ry(.iden. $k^{1}$2/y/.nu.) instead of $y^{[-10]}$ (.iden. $u_{{\tau}/y/{\nu}}$) in the low-Reynolds-number model for predicting turbulent separated and reattaching flows. The non-equilibrium effect is examined to describe recirculating flows away from the wall. The present model is validated by doing the benchmark problem of turbulent flow behind a backward-facing step. The predictions of the present model are cross-checked with the existing measurements and DNS data. The model performance is shown to be generally satisfactory.

Progress in Transgenic Cloned Pig for Xenotransplantation

  • Park, Kwang-Wook
    • Proceedings of the Korean Society of Embryo Transfer Conference
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    • 2003.10a
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    • pp.9-19
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    • 2003
  • Pig organ is thought to be the most suitable nonhuman organ for xenotransplanstation. However, one of the major constraints to using pig organs for xenotransplantation is human natural antibody-mediated hyperacute rejection (HAR). Elimination of a(1,3) galactosyltransferase (GGTA1) from the pig is expected to be a solution to the problem of hyperacute rejection. ry1any efforts have made characterization of GGTA1 in structure and function. improvement in the technique of DNA transfection of somatic cells and advancement of the pig NT, a specific modification has been made to one copy of the GGTA1 gene by Missouri group in 2002. To date because homozygousity of the genetic modification has been achieved in this gene, the role of gala(1,3) gal specific natural antibody in HAR and the efficacy of xenotransplantation in a nonhuman primate model will be addressed. If other genes are found to be involved in rejection of pig donors by primates, the technology will be available to modify those genes so that rejection can be overcome.

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A Study on the Improvement of Polishing Surface Roughness using Polishing Machine with Constant pressure (정압 폴리싱 머신에 의한 연마면조도 향상에 관한 연구)

  • 정윤교;조종래;윤상대;김남경
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2004.10a
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    • pp.139-144
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    • 2004
  • This polishing machine has many advantages to polish complicated shaped molds due to spindle header with constant pressure. But, because of new polishing machine, there is no study of the standardization of polishing by polishing conditions yet. So we want to know the relation between polishing conditions(a kind of tool, grain size) and surface roughness. The result of experimental was obtained surface roughness of 0.061${\mu}{\textrm}{m}$ Ry in case of using wood tool and grain of 6${\mu}{\textrm}{m}$ diamond.

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THE FROBENIUS PROBLEM FOR NUMERICAL SEMIGROUPS GENERATED BY THE THABIT NUMBERS OF THE FIRST, SECOND KIND BASE b AND THE CUNNINGHAM NUMBERS

  • Song, Kyunghwan
    • Bulletin of the Korean Mathematical Society
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    • v.57 no.3
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    • pp.623-647
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    • 2020
  • The greatest integer that does not belong to a numerical semigroup S is called the Frobenius number of S. The Frobenius problem, which is also called the coin problem or the money changing problem, is a mathematical problem of finding the Frobenius number. In this paper, we introduce the Frobenius problem for two kinds of numerical semigroups generated by the Thabit numbers of the first kind, and the second kind base b, and by the Cunningham numbers. We provide detailed proofs for the Thabit numbers of the second kind base b and omit the proofs for the Thabit numbers of the first kind base b and Cunningham numbers.

DYNAMICS OF A HIGHER ORDER RATIONAL DIFFERENCE EQUATION

  • Wang, Yanqin
    • Journal of applied mathematics & informatics
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    • v.27 no.3_4
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    • pp.749-755
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    • 2009
  • In this paper, we investigate the invariant interval, periodic character, semicycle and global attractivity of all positive solutions of the equation $Y_{n+1}\;=\;\frac{p+qy_{n-k}}{1+y_n+ry_{n-k}}$, n = 0, 1, ..., where the parameters p, q, r and the initial conditions $y_{-k}$, ..., $y_{-1}$, $y_0$ are positive real numbers, k $\in$ {1, 2, 3, ...}. It is worth to mention that our results solve the open problem proposed by Kulenvic and Ladas in their monograph [Dynamics of Second Order Rational Difference Equations: with Open Problems and Conjectures, Chapman & Hall/CRC, Boca Raton, 2002]

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A Study on the Flavor Compounds of Dongchimi (동치미의 맛 성분에 관한 연구)

  • Lee, Mae-Ry;Lee, Hei-Soo
    • Korean journal of food and cookery science
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    • v.6 no.1
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    • pp.1-8
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    • 1990
  • To study the most optimum condition of Dongchimi, the various Dongchimi distinct from the amount of salt, the temperature of fermentation and the ratio of radish to water were examed by sensory evaluation. Also, the content of volatile organic acids and nonvolatile organic acids were investigated by GC, the content of sulfur compounds by GC/MS. Volatile organic acids were identified with those butyl esters and nonvolatile organic acids were done with those TMS derivatives. Sulfur compounds and those decomposed products were extracted by steam distillation In results, the most optimum conditions ware salt 2.4% fermented temperature $4^{\circ}C$, ratio 1:1.5. Volatile organic acids detected were formic, acetic acid, and the amounts were effected by saltness. Nonvolatile organic acids detected were lactio, malio, fumario, tartario acid. Lactic acid was thought to effect overall eating quality. Sulfur compounds were almost the isothiocyanate groups in raw radish, which little in fermented Dongchimi.

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Diagnostic Imaging of Urachal Cyst in a Hanwoo Calf

  • Kim, Jin-Won;Cho, Young-Kwon;Kim, Se-Hoon;Kim, Ju-Ry;Cha, Jae-Gwan;Kim, Sang-Chan;Sin, Sang-Min;Lee, Hae-Beom;Choi, Ul-Soo;Kim, Min-Su;Kim, Nam-Soo;Lee, Ki-Chang
    • Proceedings of the Korean Society of Veterinary Clinics Conference
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    • 2009.10a
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    • pp.234-234
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    • 2009
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