• Title/Summary/Keyword: Gordon

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FLUID DYNAMIC IMPLICATIONS OF THE INTERMITTENCY OF TURBULENT MOMENTUM TRANSPORT IN THE OCEANIC TURBULENT BOUNDARY LAYER (海洋 亂流境界層內 斷續性의 流體力學的 意義)

  • Chung, Jong Yul;Grosch, Chester E.
    • 한국해양학회지
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    • v.18 no.2
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    • pp.104-110
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    • 1983
  • The Intermittent phenomena of the turbulent momentrm transports were closely examined in order to know the nature of intermittency and its fluid dynamic implications in the oceanic turbulent boundary layer. Also the connection between the observed intermittency and the bursting phenomenon was studied in detail. In this investigation, strong intermittency of turbulent momentum transports were found and the peak values of Reynolds stress (i,e., u'w') was about 408 times greater than average Reynolds stress (u',w') in the mid-layer and 270 times greater in the uppcrlayer of the turbulent boundary layer. These values are far greater than presently known maximum value, namely 30 times greater than the average Reynolds stress reported by Gordon (1974) and Heathersaw (1974). The distribution of Reynolds stress were extremely non-normal with the mean peak occurrence period of 5 minutes in the mid-layer and 1. 1 minutes in the upper layer of the turbulent boundary layer. Each teak lasted about 2 seconds in the mid-layer and 1.1 seconds in the upper layer of the turbulent boundary layer. Our dimensionless period of peak occurrence are found to be 33.3 in the mid-layer and 7.3 in the upper-layer, which are substantially larger than the often quoted values of 3.2-6.8 for the bursting period (Jackson, 1976). Some workers have interpreted that the intermittency phenomenon is the retlect of burst across their probe of the currentmeter (Gordon, 1974; Heathersaw, 1974). However, it was known that the burst can be found very near bottom boundary with smoothed bottom (i,e., friction Reynolds number$\leq$3,000) in the laboratory experiments. Through this investigation, it was found that the intermittent strength of the turbulent momentum transports does not conclusively indicate the characteristic feature of the boundary layer turbulence with a rough bottom (i,e., friction Reynolds number$\geq$10$\^$5/).

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Capability Assessment on Korean Meteorological Technology: A Comparative Analysis of US, Japan, and UK (한국의 기상기술력 평가: 미국, 일본, 영국과 비교분석)

  • Kim, Hye-min;Park, So-yeon;Lee, Kyoungmi;Lim, Byung-hwan;Yoo, Seung-hoon
    • Journal of Korea Technology Innovation Society
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    • v.20 no.1
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    • pp.34-61
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    • 2017
  • The objective of this study is to assess the capability of meteorological technology in Korea, the United States, Japan, and the United Kingdom as of 2015 and compare them with the previous values for Korea, the United States, and Japan. For the comparison, the indicators and weights for the assessment similar to those used in previous studies are used and Gordon's rating model is applied here to evaluate the indicators and conduct a survey of weather experts. The survey was administered to 200 of experts in meteorology using the Delphi method. More specifically, we investigate four categories of observation, data processing, forecast, and climate. The overall results show that the United Kingdom has the highest capability of meteorological technology among the four countries. With the result of indicator evaluation on this study the United Kingdom has the highest capability of meteorological technologies compared with Korea, the United States, and Japan. The capability of meteorological technology in Korea is 88.5% of the United Kingdom, 89.9% of Japan, and 90.6% of the United States. The countries in order of score on survey evaluation are the United States, the United Kingdom, Japan, and Korea. Through the result of survey evaluation, the level of meteorological technology in Korea was 88.9% of the United States, 91.6% of the United Kingdom, and 92.2% of Japan.

ISOSPECTRAL MANIFOLDS WITH DIFFERENT LOCAL GEOMETRY

  • Gordon, Carolyn S.
    • Journal of the Korean Mathematical Society
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    • v.38 no.5
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    • pp.955-970
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    • 2001
  • Two compact Riemannian manifolds are said to be isospectral if the associated Laplace-Beltrami operators have the same eigenvalue spectrum. We describe a method, based on the used of Riemannian submersions, for constructing isospectral manifolds with different local geometry and survey examples constructed through this method.

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Four Micron Polar Continuum of Jupiter

  • Kim, Sang-J;Kim, Yong-H.;Maillard, Jean-Pierre;Caldwell, John;Geballe, Tom;Bjoraker, Gordon
    • Bulletin of the Korean Space Science Society
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    • 1994.04a
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    • pp.18-18
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    • 1994
  • No Abstract. See Full-text

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REMARKS ON DENJOY-DUNFORD AND DENJOY-PETTIS INTEGRALS

  • Park, Chun-Kee
    • Communications of the Korean Mathematical Society
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    • v.15 no.1
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    • pp.91-102
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    • 2000
  • In this paper we generalize some results of R. A. Gordon ([4]) and J. L. Garmez and J. Mendoza ([3]) and prove some convergence theorems for Denjoy-Dunford and Denjoy-Pettis integrable functions.

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Numerical Solution for Nonlinear Klein-Gordon Equation by Using Lagrange Polynomial Interpolation with a Trick (라그란제 보간을 사용한 비선형 클라인 고든 미분방적식의 수치해)

  • Lee In-Jung
    • The KIPS Transactions:PartA
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    • v.11A no.7 s.91
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    • pp.571-576
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    • 2004
  • In this paper, by using Lagrange polynomial interpolation with a trick such that for $f(x)^{3}$ we shall use $f(x_i)^{3}I_i(x)^{3}$ instead of $I(x)^{3}$ where $I{x}{\;}={\;}\sum_{i}^{f}(x_i)I_i(x)$. We show the convergence and stability and calculate errors. These errors are approximately less than $C(\frac{1}{N})^{N-1} hN(N-1)(\frac{N}{2})^{N-1} /(\frac{N}{2})!$ where N is a polynomial degree.

Development of a Conceptual Framework of Nursing from Selected Concepts of Nursing Diagnoses (간호진단 분류체계에 근거한 간호개념틀 개발)

  • 김조자
    • Journal of Korean Academy of Nursing
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    • v.26 no.1
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    • pp.177-193
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    • 1996
  • For the purpose of integrating nursing diagnosis into the nursing curriculum, a descriptive survey research was done using the inductive method with questionnaires and a literature review. Research subjects included nurse educators, textbooks of adult nursing published in Korea, and the course outline for adult nursing used in one college of nursing. The Results show that there was common agreement on 39 nursing diagnosis which should be in cluded in the adult nursing curriculum, textbooks of adult nursing, and patient care on the medical-surgical units. The two existing nursing diagnosis classification systems(NANDA and Gordon's Human Response Patterns) show different basic frameworks and difficulties were discovered in integration of nursing diagnosis into the curriculum. To develop a conceptual framework for a nursing diagnosis classification system, diagnosis were classified into three categories ; health promotion, high risk problem, and actual problem on the basis of the framework used in adult nursing textbooks and Gordon's 11 Functional Health Patterns. Subconcepts for actual problems were classified as ; activity and rest, nutrition and elimination, perception and coordination, stress and coping. Progress in this study supports further development of a conceptual framework of nursing based on a nursing diagnosis classification system, from which improvement in nursing education and clinical practice can be expected.

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