• Journal of the Korean Wood Science and Technology
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• v.37 no.2
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• pp.128-136
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• 2009

Curved glued laminated timber (glulam) is rapidly coming into the domestic modern timber frame buildings and predominant in building construction. The radial stress is frequently occurred in curved beams and is a critical design parameter in curved glulam. Three models, Wilson equation, Exact solution and Approximation equation were introduced to determine the radial stress of curved glulam under pure bending condition. It is obvious that radial stress distribution between small radius and large radius was different due to slight change of neutral plane location to center line. If the beam design with extremely small radius, it should be considered to determine the exact location of maximum radial stress. The current standard KSF 3021 was reviewed and would be considered some adjustment determining the optimum radius in curved glulam. Current design principle is that the stress factor is given by the curvature term only in constant depth of the beam, but like tapered or small radius of beams, the stress factor by Wilson equation was underestimated. So current design formula should be considered to improvement for characterizing the radial stress factor under pure bending condition.

• Korean Journal of Oriental Medicine
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• v.9 no.2
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• pp.83-94
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• 2003

For identification of genuine and misuse samples of Hu-Bak medicines, an morphological characters, and RAPD (random amplified polymorphic DNA) were performed. In this study, three samples were collected, of which two were genuine and one was misuse sample. Genuine samples of 'Hu-Bak' were Magnolia obovata Thunberg and Magnolia officinalis Rehder et Wilson. Misuse samples was Machilus thunbergii S. et Z. In the morphological characters, M. obovata Thunberg and M. officinalis Rehder et Wilson were similar, but M. thunbergii S. et Z. was different with cortex, cambium, and fibrous layer. The result of RAPD analysis, seven primers can distinguish between genuines and counterfeit samples of Hu-Bak medicines.

• Proceedings of the Korean Society for Information Management Conference
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• 2013.08a
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• pp.51-54
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• 2013

본 연구는 정보학 분야의 저명한 연구자 T.D.Wilson의 연구주제 분야를 네트워크 분석을 이용하여 해석해보고, 그의 연구는 물론 정보학 분야의 연구주제에 관한 이해를 도모하는 데 연구의 목적이 있다. 이를 위해 그의 저작을 대상으로 서지결합분석 방법을 이용한 군집 분석을 실시하여 연구주제를 나누어 보고 대표적인 연구주제와 논문, 그리고 인용빈도와의 관계를 규명하였다. 패스파인더 네트워크와 노드엑셀을 이용한 분석 결과, 대표적인 연구주제는 정보행위연구이고 논문으로는 "Human information behavior(2000)"로 나타났다. 더불어 '정보요구'라는 핵심 연구주제 아래 정보탐색, 정보관리, 정보이용, 웹정보에 이르는 정보학 분야의 다양한 연구가 이루어졌음을 알 수 있다.

• Communications of the Korean Mathematical Society
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• v.39 no.3
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• pp.785-802
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• 2024

Given M a monoid with a neutral element e. We show that the solutions of d'Alembert's functional equation for n × n matrices Φ(pr, qs) + Φ(sp, rq) = 2Φ(r, s)Φ(p, q), p, q, r, s ∈ M are abelian. Furthermore, we prove under additional assumption that the solutions of the n-dimensional mixed vector-matrix Wilson's functional equation $$\begin{cases}f(pr, qs) + f(sp, rq) = 2\phi(r, s)f(p, q),\\Φ(p, q) = \phi(q, p),{\quad}p, q, r, s {\in} M\end{cases}$$ are abelian. As an application we solve the first functional equation on groups for the particular case of n = 3.

• Journal of Korea Water Resources Association
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• v.53 no.8
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• pp.597-604
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• 2020

Muskingum, a hydrologic channel flood routing, is a method of predicting outflow by using the relationship between inflow, outflow, and storage. As many studies for Muskingum model were suggested, parameters were gradually increased and the calculation process was complicated by many parameters. To solve this problem, an optimization algorithm was applied to the parameter estimation of Muskingum model. This study applied the Advanced Nonlinear Muskingum Model considering continuous flow (ANLMM-L) to Wilson flood data and Sutculer flood data and compared results of the Linear Nonsingum Model incorporating Lateral flow (LMM-L), and Kinematic Wave Model (KWM). The Sum of Squares (SSQ) was used as an index for comparing simulated and observed results. Exponential Bandwidth Harmony Search with Centralized Global Search (EBHS-CGS) was applied to the parameter estimation of ANLMM-L. In Wilson flood data, ANLMM-L showed more accurate results than LMM-L. In the Sutculer flood data, ANLMM-L showed better results than KWM, but SSQ was larger than in the case of Wilson flood data because the flow rate of Sutculer flood data is large. EBHS-CGS could be appplied to be appplicable to various water resources engineering problems as well as Muskingum flood routing in this study.

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 1996.10a
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• pp.34-37
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• 1996

해상풍에 의한 파랑의 발달을 다룬 모델은 1940년대 이후 실측파랑 및 기상자료로부터 이론에 기초한 경험식이 제시되었다. 이러한 경험식들은 실제의 불규칙한 해면상태를 유의파로 대표하여 유의파의 파고 및 주기를 풍속, 취송거리 및 취송시간의 함수로 나타낸 것이다. 널리 쓰이고 있는 심해에서의 모델은 SMB법과 Wilson법이 있으며 일정한 바람이 연속적으로 불어오는 안정된 정상상태에서는 SMB법이, 그리고 풍역이 시간적 공간적으로 변화가 큰 경우에는 Wilson법이 적용되고 있다. (중략)

• Communications of the Korean Mathematical Society
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• v.35 no.3
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• pp.711-722
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• 2020

Given a semigroup S generated by its squares equipped with an involutive automorphism 𝝈 and a multiplicative function 𝜇 : S → ℂ such that 𝜇(x𝜎(x)) = 1 for all x ∈ S, we determine the complex-valued solutions of the following functional equations f(xy) + 𝜇(y)f(𝜎(y)x) = 2f(x)g(y), x, y ∈ S and f(xy) + 𝜇(y)f(𝜎(y)x) = 2f(y)g(x), x, y ∈ S.

• Proceedings of the SAREK Conference
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• 2003.07a
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• pp.43-43
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• 2003

• International Journal of Safety
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• v.8 no.2
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• pp.15-19
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• 2009

The flash point is the most widely used flammability property for the evaluation of the flammability hazard of combustible liquid mixtures. In this paper, the reported flash points for the the binary systems, ethylbenzene+n-butanol and ethylbenzene+n-hexanol were correlated by the optimization method. The optimization method based on the van Laar and Wilson equations were compared with the Raoult's law. The calculated values based on the optimization method were found to be better than those based on the Raoult's law.

• Journal of the Korean Wood Science and Technology
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• v.25 no.4
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• pp.1-9
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• 1997

The Abies koreana Wilson has been unique species of Korea and has not been clearly investigated about lignans of extractives. This studies have been carried out from the isolation and determination of lignans from alcoholic extractives in its xylem. Six lignans were isolated and their structures were determined by spectroscopic methods. They were two new compounds, (+)-koreslactol and (-)koreanol and four known compounds, lariciresinol p-coumarate, (+)-todolactol C, (-)-${\alpha}$-intermedianol, and (+)-pinoresinol.