• Proceedings of the IEEK Conference
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• 2000.07b
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• pp.1084-1087
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• 2000

This paper presents a new approach to evaluate the maximum number of simultaneous switching gates of a given combinational circuit. The new approach is based on an iterative method proposed by Sinogi et al. and applies a simulated annealing strategy to search jot a new solution. The experimental evaluation using ISCAS’85 benchmark circuits shows that the proposed approach has attained an excellent improvement compared with other rotated methods including the iterative method.

• Proceedings of the Korean Vacuum Society Conference
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• 2000.02a
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• pp.194-194
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• 2000

There are difficulties on transport modelling on high density plasma discharge, because of severe restrictions on space grid size and time step size. We present a new unconditionally stable algorithm for fluid simulation of high density process plasma. The origin of the restriction is investigated and a new method to solve the problem is suggested, The simulation result is compared with the other methods previously developed.

• Research in Mathematical Education
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• v.13 no.4
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• pp.341-347
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• 2009

In the present paper we give a brief account of importance and necessity of pre and in-service education for professional development of mathematics teachers. We discuss some critical issues and new strategies for enhancing professional development. A few new strategies for professional learning are also explained. In the end some observations and suggestions arc mentioned for implementation

• Animal cells and systems
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• v.5 no.2
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• pp.113-116
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• 2001

A new species, Pedetontinus lineatus sp. nov., is described. The genus Pedetontinus is reported for the first time from South Korea in this study. The total number of species of Archaeognatha from Korea is eight in four genera, all of which belong to the family Machilidae. Description, remarks and biological notes of the species are given.

• Animal Systematics, Evolution and Diversity
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• v.25 no.1
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• pp.61-64
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• 2009

A new species Diplastrella yongmeoriensis n. sp. was collected from Jejudo Island, Korea in 2008. This new species is similar to D. bistellata (Schmidt, 1862) in growth form and skeletal structure but differs in the composition and size of spicules. The genus Diplastrella is reported for the first time in Korea.

• Steel and Composite Structures
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• v.19 no.6
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• pp.1561-1580
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• 2015

No significant improvement has been observed on the seismic performance of the ordinary steel reinforced concrete (SRC) columns compared with the reinforced concrete (RC) columns mainly because I, H or core cross-shaped steel cannot provide sufficient confinement for core concrete. Two improved SRC columns by constructing with new-type section steel were put forward on this background: a cross-shaped steel whose flanges are in contact with concrete cover by extending the geometry of webs, and a rotated cross-shaped steel whose webs coincide with diagonal line of the column's section. The advantages of new-type SRC columns have been proved theoretically and experimentally, while construction measures and seismic behavior remain unclear when the new-type columns are joined onto SRC beams. Seismic behavior of SRC joints with new-type section steel were experimentally investigated by testing 5 specimens subjected to low reversed cyclic loading, mainly including the failure patterns, hysteretic loops, skeleton curves, energy dissipation capacity, strength and stiffness degradation and ductility. Effects of steel shape, load angel and construction measures on seismic behavior of joints were also analyzed. The test results indicate that the new-type joints display shear failure pattern under seismic loading, and steel and concrete of core region could bear larger load and tend to be stable although the specimens are close to failure. The hysteretic curves of new-type joints are plumper whose equivalent viscous damping coefficients and ductility factors are over 0.38 and 3.2 respectively, and this illustrates the energy dissipation capacity and deformation ability of new-type SRC joints are better than that of ordinary ones with shear failure. Bearing capacity and ductility of new-type joints are superior when the diagonal cross-shaped steel is contained and beams are orthogonal to columns, and the two construction measures proposed have little effect on the seismic behavior of joints.

• Journal of Korean Society for Quality Management
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• v.44 no.1
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• pp.95-108
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• 2016

Purpose: This study aims to investigate the effect of product creativity on the financial performance of new product in the food industry. In addition, the applicability of creative thinking method for the development of creative new food product is examined. Methods: In this study, OPA(Originality-Practicality Analysis) method is applied to evaluate the creativity of 32 new food products of 'H' food company in Korea. Effects of product creativity on the financial performance are analyzed using t-test and logistic regression analysis. In order to examine the applicability of SIT(Systematic Inventive Thinking) for the new product development process, each subject are classified according to five SIT tools. Results: The product group belongs to creative area(CA) shows the highest financial performance among the quadrants of OPA matrix. The products are divided into two groups whether the product can be classified by SIT tools or not. The products belonged to SIT group show higher creativity than non-SIT group. Conclusion: From the result, it can be concluded that product creativity has effect on the financial performance of the new food products, and SIT can be used as a powerful tool in developing creative new food products.

• Journal of Korea Technology Innovation Society
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• v.3 no.1
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• pp.139-153
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• 2000

The aim of this paper is to provide a new model to evaluate the quantitative value of technology(nonfinancial benefits). This new model is based on the technology stock(technology level) ac-quired in R&D process. The model can explain the quantitative relation between the technology stock(level) and the market value of technology as considering the R&D expenditure to acquire technologies above a certain level(>70%) in comparison with the advanced country and the cost to prevent the technology obsolescence. The value of non-destructive testing technology which is one of the electric power technology is measured quantitatively as a case study.

• Journal of the Korean Mathematical Society
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• v.37 no.5
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• pp.657-664
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• 2000

A new concept of stability that includes Lyapunov and orbital stabilities and leads to concepts in between them is discussed in terms of a given topology of the function space. The criteria for such new concepts to hold are investigted employing suitably Lyapunov-like functions and the comparison principle.

• Natural Product Sciences
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• v.5 no.2
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• pp.93-96
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• 1999

A new ergosteryl myristate (1) and ergosterol (2) have been isolated from the organic extract of the mycelium of unidentified marine algicolous fungus, isolate MF001. The structure of a new compound was assigned on the basis of comprehensive spectroscopic analyses and chemical synthesis.