• International Journal of Railway
• /
• v.5 no.4
• /
• pp.148-151
• /
• 2012

Applications of superconducting technology in transportation is more straightforward than others, such as magnetic levitation (maglev) trains. A maglev train is of high speed & low power-consumption, environmental friendly and safe, accompanied by some drawbacks. This article will introduce the application of superconducting technology in the urban mass transport system, and the bottleneck of this application.

• Bulletin of the Korean Chemical Society
• /
• v.34 no.11
• /
• pp.3425-3428
• /
• 2013

We solve the Klein-Gordon equation with the Morse empirical potential energy model. The bound state energy equation has been obtained in terms of the supersymmetric shape invariance approach. The relativistic vibrational transition frequencies for the $X^1{\sum}^+$ state of ScI molecule have been computed by using the Morse potential model. The calculated relativistic vibrational transition frequencies are in good agreement with the experimental RKR values.

• Archives of Pharmacal Research
• /
• v.28 no.11
• /
• pp.1233-1235
• /
• 2005

Two new biflavonoids, 3'-hydroxyamentoflavone-7-O-methyl ether (1) and 3'-hydroxyamentoflavone (2), were isolated from the fruits of Aristolochia contorta Bge. Their structures were elucidated by HR-ESI-MS, 1D-, and 2D-NMR spectroscopy.

• Bulletin of the Korean Chemical Society
• /
• v.25 no.12
• /
• pp.1775-1778
• /
• 2004

The branch-like, feather-like $BaCrO_4$ nano-superstructures were synthesized with bioactive eggshell membrane as directing and assembly template. Studies on the two products revealed that they formed through the self-assembly of nanoparticles, and that the optical properties of the products were different from $BaCrO_4$ bulk materials.

• Bulletin of the Korean Chemical Society
• /
• v.32 no.10
• /
• pp.3817-3820
• /
• 2011

• Journal of applied mathematics & informatics
• /
• v.9 no.1
• /
• pp.87-99
• /
• 2002

We consider the problem of oscillation and nonoscillation solutions for unstable type second-order neutral difference equation : $\Delta^2(x(n))-p(n)x(n-\tau))=q(n)x(g(n))$. (1) In this paper, we obtain some conditions for the bounded solutions of Eq(1) to be oscillatory and for the existence of the nonoscillatory solutions.

• Journal of applied mathematics & informatics
• /
• v.11 no.1_2
• /
• pp.201-213
• /
• 2003

In this paper we present a second order PVT (parallel variable transformation) algorithm converging to second order stationary points for minimizing smooth functions, based on the first order PVT algorithm due to Fukushima (1998). The corresponding stopping criterion, descent condition and descent step for the second order PVT algorithm are given.

• Journal of applied mathematics & informatics
• /
• v.23 no.1_2
• /
• pp.361-367
• /
• 2007

In this paper we propose an implementable method for solving a nonsmooth convex optimization problem by combining Moreau-Yosida regularization, bundle and quasi-Newton ideas. The method we propose makes use of approximate subgradients of the objective function, which makes the method easier to implement. We also prove the convergence of the proposed method under some additional assumptions.

• Proceedings of the Korean Magnestics Society Conference
• /
• 2017.05a
• /
• pp.205-206
• /
• 2017

• Proceedings of the Korean Magnestics Society Conference
• /
• 2017.05a
• /
• pp.115-115
• /
• 2017