• 대한수학교육학회지:수학교육학연구
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• 제17권4호
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• pp.333-357
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• 2007

오늘날 수학교육에 있어서 가장 중요한 문제 중 하나는 학교수학의 인간교육적 기반을 회복하는 것이며, 이를 위해서는 '수학을 가르치는 이유는 무엇인가'라는 보다 근원적인 문제에 대한 논의가 새롭게 요구된다. 본 논문은 생활의 문제 해결이나 과학 기술을 위한 유용한 도구적 지식교육을 지향하는 오늘날 수학교육에 대한 문제 의식에서 출발한다. 먼저 '마음의 중층구조 이론에 비추어 이론적 지식 중심의 수학교육의 의미를 분석적으로 논의하고, 과거 교육사상사에서 수학교육이 어떤 인간교육적 이념을 추구해 왔는지를 Platen과 Froebel의 교육론을 통해서 살펴보았다. 그리고 20세기 초수학교육 개혁운동을 선도하여 현대의 수학교육 천학 및 수학 교육과정의 기본바탕을 제시한 F. Klein의 수학교육론을 고찰하였다. 특히 Klein의 수학교육 사상의 이면을 보다 명확히 드러내기 위하여, '마음의 중층구조'에 비추어 그의 수학교육론을 심성함양이라는 측면에서 재음미하였다. 또한 Klein의 수학교육 이념에 대한 보다 발전적인 논의를 위하여 Klein 이후 수학교육 발전과정에서 드러난 몇 가지 연구결과를 종합하여 심성함양으로서 '함수적 사고' 교육에 대한 발전적 고찰을 시도하였다. 이상과 같은 고찰을 통해 실용적 가치 추구로만 여겨졌던 오늘날의 수학 교육과정의 이면에 심성함양으로서의 인간교육적 가치가 핵심을 이루고 있으며, 수학교육은 그러한 가치 추구를 중시함으로써 심성함양에 기여해야 함을 논하였다.

• 대한수학회보
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• 제57권2호
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• pp.281-294
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• 2020

The initial-boundary value problem for a class of semilinear Klein-Gordon equation with logarithmic nonlinearity in bounded domain is studied. The existence of global solution for this problem is proved by using potential well method, and obtain the exponential decay of global solution through introducing an appropriate Lyapunov function. Meanwhile, the blow-up of solution in the unstable set is also obtained.

• 호남수학학술지
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• 제30권4호
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• pp.631-635
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• 2008

In this paper we discuss on the formal linearization and exact solution of Klein-Gordon's equation (1) $u_{tt}-au_{xx}+bu-cu^3=0 a,b,c{\in}R^+$ So that we know an efficient method for constructing of particular solutions of some nonlinear partial differential equations is introduced.

• Bulletin of the Korean Chemical Society
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• 제32권12호
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• pp.4233-4238
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• 2011

Based on the exact quantization rule for the nonrelativistic Schrodinger equation, the exact quantization rule for the relativistic one-dimensional Klein-Gordon equation is suggested. Using the new quantization rule, the exact relativistic energies for exactly solvable potentials, e.g. harmonic oscillator, Morse, and Rosen-Morse II type potentials, are obtained. Consequently the new quantization rule is found to be exact for one-dimensional spinless relativistic quantum systems. Though the physical meanings of the new quantization rule have not been fully understood yet, the present formal derivation scheme may shed light on understanding relativistic quantum systems more deeply.

• Bulletin of the Korean Chemical Society
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• 제35권12호
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• pp.3443-3446
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• 2014

We present the solution of Klein Gordon equation with new generalized Morse-like potential using SUSYQM formalism. We obtained approximately the energy eigenvalues and the corresponding wave function in a closed form for any arbitrary l state. We computed the numerical results for some selected diatomic molecules.

• Journal of applied mathematics & informatics
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• 제24권1_2호
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• pp.411-419
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• 2007

In this paper, $\tilde{2}$-essential rooted maps on the Klein bottle are counted and an explicit expression with the size as a parameter is given. Further, the numbers of singular maps and the maps with one vertex on the Klein bottle are derived.

• Journal of applied mathematics & informatics
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• 제28권5_6호
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• pp.1227-1237
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• 2010

In this paper, a Klein-Gordon equation is solved by using the homotopy analysis method (HAM), homotopy perturbation method (HPM) and modified homotopy perturbation method (MHPM). The approximation solution of this equation is calculated in the form of series which its components are computed easily. The uniqueness of the solution and the convergence of the proposed methods are proved. The accuracy of these methods are compared by solving an example.

• Bulletin of the Korean Chemical Society
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• 제31권12호
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• pp.3573-3578
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• 2010

Recently it is suggested that it may be possible to obtain the approximate or exact bound state solutions of nonrelativistic Schr$\ddot{o}$dinger equation from relativistic Klein-Gordon equation, which seems to be counter-intuitive. But the suggestion is further elaborated to propose a more detailed method for obtaining nonrelativistic solutions from relativistic solutions. We demonstrate the feasibility of the proposed method with the Morse potential as an example. This work shows that exact relativistic solutions can be a good starting point for obtaining nonrelativistic solutions even though a rigorous algebraic method is not found yet.

• 호남수학학술지
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• 제40권4호
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• pp.771-783
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• 2018

This paper, we investigate a strongly damped nonlinear Klein-Gordon equation with nonlinearities of variable exponent type $$u_{tt}-{\Delta}u-{\Delta}u_t+m^2u+{\mid}u_t{\mid}^{p(x)-2}u_t={\mid}u{\mid}^{q(x)-2}u$$ associated with initial and Dirichlet boundary conditions in a bounded domain. We obtain a nonexistence of solutions if variable exponents p (.), q (.) and initial data satisfy some conditions.

• Kyungpook Mathematical Journal
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• 제60권4호
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• pp.831-837
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• 2020

Let M be the exterior of a hyperbolic link K ∪ L in a homology 3-sphere Y, such that the linking number lk(K, L) is non-zero. In this note we prove that if γ is a slope in ∂N(L) such that the manifold ML(γ) obtained by γ-Dehn filling along ∂N(L) contains a Klein bottle, then there is a bound on Δ(μ, γ), depending on the genus of K and on lk(K, L).