• 대한수학회논문집
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• 제12권4호
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• pp.985-998
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• 1997

For n random strips chosen so as to meet a fixed bounded convex set K of the plane we let $\nu$ be the number of intersection regions that meet K. We develop the integral formula for the mean value of $\nu$ and $\nu^2$ involving the area and the perimeter of K and the breadths of the strips. We get some geometric inequalities in way of studying integral geometry.

• 한국대기환경학회지
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• 제16권1호
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• pp.1-10
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• 2000

The behavior of aerosos due to gravitational coagulation was studied experimentally and numerically. In experimental study, the geometric mean particel size increased as time elapsed in a vertical tube column, while the size decreased when the tube was set horizontally. The particle size distribution was observed to maintain the lognormal form during the coagulation process. Separately, numerical calculations were performed for studying the aerosol behavior under gravitational and Brownian coagulation using the moment method. By comparing the expeimented results with the numerical predictions, the governing mechanism of the aerosol behavior proved to be gravitational coagulation.

• 대한약학회:학술대회논문집
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• 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
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• pp.200-200
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• 2002

Cadmium (Cd) is an environmental pollutant and categorized as a human carcinogen, which has a tendency to accumulate in the human body. The level of Cd in renal cortex and liver are good indicators as an index of Cd exposure in general population. Geometric mean concentration of Cd is 27.4 and 3.1 /g wet weight in renal cortex and liver, respectively, in Korean. Cd is toxic to a number of tissues, notably the liver, kidney, testis, lung, lymphoid tissue and lung. (omitted)

• 천문학회지
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• 제19권2호
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• pp.69-89
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• 1986

The global morphology and geometric parameters of 39 barred galaxies are investigated, by using isophote map and isodensity tracings obtained from detailed surface photometry with the Kiso V-band plates. The observed results are as follows: i) There is no strong indication that the ratio of bar length to disk size is correlated with Hubble type, except that the largest bars appear in the SBb galaxies. ii) The mean value of axial ratios of bars is $2.0{\pm}0.4$ and there is a trend that early type galaxies have smaller axial ratios than late type galaxies. iii) About 15% of early type barred galaxies(Sb0-SBb) have triaxial bulges.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제4권2호
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• pp.11-20
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• 2000

This paper presents a formula that relates the optimal exercise boundaries of American call and put options on futures contract. It is shown that the geometric mean of the optimal exercise boundaries for call and put written on the same futures contract with the same exercise price is equal to the exercise price which is time invariant. The paper also investigates the properties of American calls and puts on futures contract.

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part 1
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• pp.18-19
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• 2006

To improve the properties of fine metal powder, such as particle size distribution and geometric standard deviation, this work was done at various atomizing conditions. The new atomization mechanism and the correlation equation were proposed to estimate the mean particle diameter.

• 품질경영학회지
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• 제26권1호
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• pp.1-10
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• 1998

Su, pp.ier quality plays a major role in the evaluation of su, pp.iers, making it very necessary to develop a proper quality measure useful in selecting su, pp.iers that is able to meet quality specification of the customer. In this paper, we present a measure of the overall quality performance which is a weighted geometric mean of the process capability indices of the quality characteristics of a su, pp.ier. This measure can be used both as a measure of su, pp.ier selection for the customer and as a measure for the self-analysis of the quality performance for the su, pp.ier.

• 대한수학회보
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• 제53권2호
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• pp.441-460
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• 2016

We introduce the notions of h-v-semi-slant submersions and almost h-v-semi-slant submersions from almost quaternionic Hermitian manifolds onto Riemannian manifolds. We obtain characterizations, investigate the integrability of distributions, the geometry of foliations, and a decomposition theorem. We find a condition for such submersions to be totally geodesic. We also obtain an inequality of a h-v-semi-slant submersion in terms of squared mean curvature, scalar curvature, and h-v-semi-slant angle. Finally, we give examples of such maps.

• Journal of applied mathematics & informatics
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• 제41권1호
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• pp.123-132
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• 2023

We define an operator version of the relative Rényi entropy as the generalization of relative von Neumann entropy, and provide its fundamental properties and the bounds for its trace value. Moreover, we see an effect of the relative Rényi entropy under tensor product, and show the sub-additivity for density matrices.

• 방사성폐기물학회지
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• 제2권1호
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• pp.77-85
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• 2004

원전에서 발생된 중$.$저준위 방사성 폐기물의 경우 처분장으로 이송되기 이전에 드럼에 대한 세부적인 정보 특히 핵종 재고량에 대한 평가가 수행되어야 한다. 그러나 드럼처리된 방사성폐기물의 경우 평가 대상 핵종 농도에 대한 예측이 어려운 것이 일반적이다. 따라서 이를 극복하고자 직접측정이 어려운 경우 척도인자 방법을 활용하고 있다. 국내의 경우 1996년부터 고리원전에서 척도인자 개념이 적용된 핵종분석장치를 운영해오고 있다. 그러나 고리원전에 적용된 척도인자의 경우 많은 개선의 여지가 남겨져 있다. 따라서 현재 척도인자의 향상을 위한 연구가 진행 중에 있다. 본 논문에서는 연구의 범위에 대한 개략적인 소개와 핵종 재고량 평가 방법 중 보다 신뢰할 수 있는 평가 방법을 찾고자 통계적인 척도인자 평가 방법을 비교 평가했으며 이를 통해 고리원전에 사용된 산술평균 방법을 기하평균 방법으로 바꾸는 것이 예측의 정확성을 향상시킬 수 있을 뿐만 아니라 드럼내 핵종 재고량의 과대평가를 막고 합리적인 보수성을 유지할 수 있음을 알수 있었다.