• Proceedings of the Korean Information Science Society Conference
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• 1999.10b
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• pp.336-338
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• 1999

본 논문에서는 사회 학습의 이론의 하나인 관찰 학습 이론에 기반한 네트웍 앙상블을 위한 관찰 학습 알고리즘을 제안한다. 하나의 네트웍이 학습할 대 함께 학습되는 다른 네트웍들을 이용하여 가상 데이터를 생성하여 학습에 이용하므로써 데이터가 부족한 경우 네트웍이 과학습 되는 것을 방지고 각 네트웍의 일반화 성능을 향상시키는 동시에 앙상블의 성능도 향상시킨다. 제안된 방법을 사인 함수의 근사 문제와 중첩된 두 정규 분포의 분류 문제에 적용하고 단일 네트웍, 네트웍 위원회, Bagging 알고리즘과 비교하여 제안된 방법의 일반화 성능의 우수성을 보였다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.3
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• pp.1439-1443
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• 2011

A theoretical study on the ground water flow adjacent to buried pipe was conducted. Incompressible and irrotational flow were considered in analytical study. Ground water flow were defined by complex potentials. Firstly, uniform flow without buried pipe was analysed and then the effect of buried pipe was considered by superposition via circle theorem. Although two kinds of flow can be added by linearity of complex potentials, investigation of the singularities of the complex potentials should be done in advance. Finally, ground water flow past a buried pipe was analysed via complex potentials and net force exerted on the buried pipe by the ground water flowing past with circulation was derived.

• Journal of KIISE:Computer Systems and Theory
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• v.27 no.1
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• pp.23-33
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• 2000

We propose a model which overlaps communication with computation for efficient communication in the data-parallel programming paradigm. The overlapping model divides a given loop partition into several sub-partitions to obtain computation which can be overlapped with communication. A loop partition sometimes refers to other data partitions, but not all iterations in the loop partition require non-local data. So, a loop partition may be divided into a set of loop iterations which require non-local data, and a set of loop iterations which do not. Each loop sub-partition is dynamically scheduled depending on associated message arrival, The experimental results for a few benchmarks in IBM SP2 show enhanced performance in our overlapping model.

• Journal of KIISE:Computer Systems and Theory
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• v.30 no.12
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• pp.749-755
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• 2003

Digital signal processing hardware based in RNS is currently considered as an important method for high speed and low cost hardware realization. This research designs and implements the method for conversion from a specific residue number system with moduli of the from $(2^k-1, 2^k, 2^k+1)$ to a weighted number system. Then, it simulates the implementation using a overlapped multiple-bit scanning method in the process of CRT conversion. In conclusion, the simulation shows that the CRT method which is adopted in this research, performs arithmetic operations faster than the traditional approaches, due to advantages of parallel processing and carry-free arithmetic operation.

• Korean Journal of Food Science and Technology
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• v.27 no.2
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• pp.193-198
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• 1995

The changes in the rheological properties of soybean curd upon the various storage temperatures ($5{\sim}25^{\circ}C$) were measured by the stress-relaxation test and analysed by time-temperature superposition theory. As the storage temperature was lower, higher initial and equilibrium stress of soybean curd were observed. When the stress-relaxation curves were moved horizontally by using the shift-factor on the basis of reference temperature, the master curve was obtained. By applying master curve and shift-factor to the WLF (Williams-Landel-Ferry) equation, activation energy (30kcal/mol) was calculated and storage time at the specific temperature could be predicted, suggesting the equivalent shelf-life of soybean curd texture.

• The Korean Journal of Rheology
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• v.5 no.2
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• pp.125-135
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• 1993

고밀도 폴리에틸렌(High density polyethlene, HDPE)내에 차단성 수지인 나일론 (Nylon)이 분산된 블렌드의 모폴로지와 유기 용제에 대한 차단성에 대해 연구하였다. 나일 론이 구형, 실린더 및 판상 구조 형태를 가지며 분산된 블렌드를 가공조건을 변화시켜 제조 하였다. 블렌드의 모폴로지가 유기 용제의 차단성에 끼치는 영향을 알아보기 위하여 투과시 험을 하였으며 수치 모사를 통하여 투과도를 이론적으로 예측해 보았다. 동일한 나일론양에 서 분산상인 나일론이 구형 또는 실린더 형태를 갖는 경우 투과액에 대해 낮은 차단성을 보 이는데 반하여 판상구조를 갖게되는 경우에는 차단성이 크게 상승함을 관찰할수 있었다. 이 는 판상구조형태를 취함으로써 블렌드내에서의 투과액의 투과경로가 길어졌기 때문이다. 나 일론 층의 여러기하학적인 형태변화에 대해 GRM관계식 및 이를 수정한 식을 이용하여 투 과도를 예측하여 보았다. 나일론층의 중첩도가 높다고 가정한 경우가 중첩도를 낮게 생각한 경우에 비해 높은 차단성을 보임을 수정된 GRM 관계식을 통하여 알 수 있었다. 또한 나일 론 층의 폭이 증가할수록 그리고 두께가 감소할수록 높은 차단효과를 보임을 예측 할 수 있 었다.

• Lingua Humanitatis
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• v.2 no.1
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• pp.303-314
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• 2002

The main purpose of this paper is to show how Jespersen analyzed the date of English compound related with reduplication. Especially dealing with the compound words he classified the examples related with reduplication as a separate part and attempted to account for the patters based on the structure of the first syllable constituting the initial part of the second element in a compound word. 1 tried to explain the peculiar shape of the reduplicational pattern in English based on the Optimality Theory, especially the method of 'melodic overwriting' of McCarthy(1997). According to the analysis the initial part of the second element of a compound has to be stipulated before reduplication occurs. When the reduplicant has to be decided at the first syllable of the second element, the form which is stipulated to take the position comes to appear at the post instead of repeating the morphemic shape of the first syllable at the first element of the word.

• Proceedings of the Korean Information Science Society Conference
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• 2011.06d
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• pp.221-224
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• 2011

본 논문에서는 중첩 된 WBAN(Wireless Body Area Network) 환경에서 비경쟁 전송구간의 신뢰성 있는 전송을 위해 한정된 자원(비경쟁 전송구간)을 각각의 WBAN에게 할당하는 방안을 제안한다. 이를 위해 협동적 게임 이론(cooperative game theory)을 바탕으로 한정된 자원(비경쟁 전송구간)을 효율적이고 공평하게 할당 할 수 있도록 내쉬중재(Nash arbitration) 기법을 통한 자원 할당 방안을 살펴본다. 내쉬중재 협상해법을 통해 WBAN 간 비경쟁 전송구간의 충돌 없이 신뢰성 있는 전송을 보장한다. 또한, 각 WBAN의 비경쟁 전송 구간 내의 디바이스 우선순위와 할당받은 timeslot의 개수를 고려하여 전략 선택에 따른 형평성과 각 WBAN이 비경쟁전송 구간 내에 요구하는 최소한의 timeslot을 보장한다.

• Transactions of the Korean Society of Mechanical Engineers
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• v.19 no.9
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• pp.2114-2121
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• 1995

Surface generation model of three types of endmills is introduced to analyse the cutting mechanism of an endmill more accurately. Superposition method is introduced to define the effective cusp including the effects of cutter mark. Through the comparison of three endmills, it is shown that the ball-nose endmill is superior to the ball endmill and the flat endmill for inclined milling process in 3-or 5-axis machining modes. By using the objective function minimizing the machining time, appropriate nose radius is selected for various cutter radiuses and cutter inclination angles.

• Journal of the Korea institute for structural maintenance and inspection
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• v.13 no.3 s.55
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• pp.101-109
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• 2009

An algorithm is proposed for estimating dynamic displacements of a bridge by using FBG sensors and by superposing some measurable low modes. Modal displacements are obtained from the beam theory and the generalized coordinates are deduced from the strains measured by FBG sensors. By considering flexural and torsional modes occurred in bridges only as flexural modes of a simply supported beam by separating a bridge into multiple girders or parts, the proposed algorithm can be applied to various types of bridges. Guidelines are provided theoretically for determining the number of modes and the number of strain gages to be used. The proposed algorithm has been examined through simulation studies on various types of bridges, laboratory experiments on a model bridge, and field tests on a simple span PC Box girder bridge. Through the simulation study, the effects of the error in the vibration modes and measurement noise on estimating the dynamic displacements are analyzed.