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강병식,박중윤,홍성욱 金烏工科大學校 2000 論文集 Vol.21 No.-
This paper presents an exact dynamic element for composite Timoshenko beam, which is inherently subjected both to bending and torsional vibration. The coupling effect between bending and torsional vibrations is considered in the derivation of the exact dynamic element. Three examples are provided to validate and illustrate the proposed exact dynamic element matrix for composite Timoshenko beam.
姜秉植,宋玄鍾 고신대학교 자연과학연구소 1994 고신대학교 자연과학연구소 논문집 Vol.4 No.-
The Gaussian ring Z [i] = {a+bi | a, b ∈ Z) can have a geometric interpretation by complete residue classes. Using complex bases, a Gaussian integer z can be expanded by a radix representation. Those complex number which are expressed by the above expansion are classified in the complex plane. We differently color those number depending the power of B. In this process we get plenty of fantastic fractiles. As an application we have a criterion about the completeness for a digit system.
고상반응법으로 합성한 Eu0.8Sr0.2MnO3 분말시료의 강자성-상자성 상전이특성
강병식,김재영,이보화,김경섭,유성초 한국물리학회 2010 새물리 Vol.60 No.6
망간 페로브스카이트 물질인 Eu0.8Sr0.2MnO3의 강자성-상자성 상전이온도부근에서의 등온자화값을 측정한후 Arrott plot 기법을 통하여 큐리온도 TC = 54 ± 1 K와 상전이 임계지수 값을 구하였다. 구하여진 값들은 β = 0.58 ± 0.02, γ = 1.22 ± 0.03 및 δ = 3.03 ± 0.02 이었다. 이러한 값들은 평균장모델의 적용치와 근사를 이루었으며 β값이 다른 망간 페로브스카이트 물질보다 크게 관측되었다. The critical properties of the manganite perovskite Eu0.8Sr0.2MnO3 material were investigated based on static magnetization measurements. The magnetic data in the ferromagnetic-paramagnetic phase transition region were analyzed by using the Arrott Plot method, which gave values of TC = 54 ± 1 K, β = 0.58 ± 0.02, γ = 1.22 ± 0.03, and δ = 3.03 ± 0.02 for the critical exponents. The values obtained for the critical exponents are close to those predicated by the mean-field theory, and the β value is bigger than the values for other manganite perovskite materials.