• The Korean Journal of Applied Statistics
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• v.23 no.6
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• pp.1217-1224
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• 2010

In many sports games, we would use a coin or the game of scissors-paper-stone to decide which side will begin first. We consider the game of scissors-paper-stone when two teams are composed of N respectively. We continue the game of scissors-paper-stone until the winner of the two team is decided. Using sample spaces and enumerating the elements we calculated the mean number of the game when N = 1, N = 2 and N = 3. In case of N = 1 and N = 2, we simulate the game and find the mean and variance when the repetition number n = 20; 30; 50; 100; 150; 200.

• Proceedings of the Acoustical Society of Korea Conference
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• spring
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• pp.283-286
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• 2004

기역자형 경석 16개로 구성된 편경의 진동방식 진동수를 분석하였으며, 황종고 청협종에 해당하는 경석의 진동방식 모양을 가속도계, TV 홀로그램 및 STAR system을 이용하여 분석하였다. 각 경석의 진동방식 진동수비와 함께 가속도계, TV 홀로그램 및 STAR 분석을 통해 얻은 진동방식 모양을 제시하였다. 각 경석의 제2진동방식 진동수는 기명진동수의 1.5배, 제3진동방식 진동수는 2.3배이다. 마림바의 경우는 제2진동방식 진동수는 기명진동수의 4배, 제3진동방식은 10.1이다. 진동방식 모양은 황종과 청협이 유사하였으며 중국 편경의 진동방식모양과 유사하였다. 몇몇의 높은 진동방식 모양은 낮은 진동방식의 결합으로 보였다.

• Proceedings of the Korea Concrete Institute Conference
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• 2004.05a
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• pp.584-587
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• 2004

This research investigates the rheological behavior and the confined water ratio of the cement paste and binder condition in order to predict mix design proportion of the high flowing concrete. The purpose of this study is to determine the optimum replacement ratio of binders including fly ash, and lime stone powder by the cement weight. For this purpose, belite cement, blast furnace slag cement and ordinary portland cement are selected. As test results, the confined water ratio shows the following range ; OPC>blast furnace slag cement>belite cement. Therefore, belite cement is proved very excellent cementitious materials in a view point of the flowability. The optimum replacement ratio of lime stone powder is shown over $30\%$ in case of belite cement and about $10\%$ in case of slag cement type. Also, the optimum replacement ratio of fly ash is shown $30\%$ by the cement weight considering the confined water ratio and deformable coefficient of the paste condition.

• Korean Institute of Interior Design Journal
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• no.2
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• pp.46-53
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• 1994

The Soubise Mansin which construction ended in the latter half of 1730s has several rooms which symbolize Rococo which appeared in the 18 century. The work of the Soubis Mansion done by an architect, Boffrand , is a significant work in which he had introduced a new style of building , Rococo, based on a style of Regency, thereby showing a big leaf in that kind of art. In other words, with the elements already established in the days of Regency-white wood panel, gold molding, mirror technique, etc. -and the characteristics of unprecedent, outstanding spatial forms and Rococo decoration introduced. Rococo had enjoyed its peak of full flourish within the moderation of being never excessively magnificent, beautiful, and dignified. It is a remarkable thing that a model of such perfect ideal beauty was suggested even in the begining state of Rococo and it is deemed that such a point resulted in such influence on other places like the Versalilles Palace, etc.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2002.10a
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• pp.345-348
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• 2002

The dredged soils of rural streams can be treated with cement for recycling. It is very important to know whether the treated soils have achieved some required qualities for further treatments if the soils are mixed with cement. In this study, fall-cone test was used to examine changes in workability and compactibility during an curing time of soil-cement mixture. Test results showed that fall-cone apparatus can be satisfactorily used for this purpose. Although there was some difference of initial curing time and cement contents, the engineering properties of treated soils were little affected.

• Magazine of the Korean Society of Agricultural Engineers
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• v.45 no.5
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• pp.133-139
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• 2003

Dredged soil from sea has much higher water content than liquid limit of clay and even if small loads apply, it will suffer a great settlement. Therefore it is very difficult to perform a consolidation test with general consolidation apparatus because of high water content. In this study Rowe Cell Apparatus consolidation tests have been performed with 1 remolding clay of water content 56% and 4 slurry clays of a water content of 100%, 120%, 133% and 150%. From the test results the consolidation characteristics such as compression index, secondary compression index and consolidation coefficient have been investigated with a variation of water content of dredged soil. The equations to get consolidation constants such as a compression index, a consolidation coefficient have been proposed with the field water content.

• Journal of Korean Association for Spatial Structures
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• v.13 no.3
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• pp.65-72
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• 2013

Long span arch structure is composed of arch as relatively flexible structure and column as relatively rigid structure. In this study, the characteristic of dynamic response is analyzed according to the natural frequency ratio between arch and columns. The result of analysis for arch as relatively vertical vibration mode is dominant, the influence of columns mainly appears at relatively high frequency band according to increase of 1st mode frequency in column. However, the dynamic characteristic of arch structure is expected to vary with not only frequency ratio but interaction between vibration modes of arch and columns.

• Journal of the Korean Society for Precision Engineering
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• v.14 no.6
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• pp.52-63
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• 1997

Non-circular gear has a good velocity ratio in high speed and heavy load without any slip, moreover, it can transmit various motion, using simpler structure than link and cam, automation mechainism. In case of designing and manufacturing non-circular gear. I suggest one of references in applying non-circular gear to industrial plant, and suitable range of application by pressure angle curvature and angle ratio

• Transactions of the Korean Society of Mechanical Engineers
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• v.10 no.1
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• pp.170-180
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• 1986

본 연구에서는 2자유도 Hamiltonian 운동계에서 비선형 정규모우드(normal mode)들의 안정성을 예측하기 위한 제3의 운동상수를 선형계의 진동수비가 1:1이고 포텐셜이 4차항까지 우함수인 일반계에 적용하여 발전시켰다. 이는 Hamiltonian을 정규모우드로 바꾸는 B-G변환과 함수들을 부호처리함과 Poincare map을 이용하다. 비선형계에서 비선형상수에 따라 모우드가 bifurcate되며, 각각의 모우드 안정성은 제3의 운동상수와 Poincare map으로 정확히 판정할 수 있다는 결론을 얻었다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.19 no.1
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• pp.162-168
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• 2005

This paper concerns developing a real time on-line light facility management system using internet and building a database system for control box and street light. Also, we designed the system to minimize the disparity with the conventional management system by referring to an old management ledger format. Thus, the proposed method may enable the system manager to administer the light facility efficiently and to reduce manpower and maintenance cost.