• Journal of the Korean Society for Library and Information Science
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• v.35 no.4
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• pp.217-238
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• 2001

As an exploratory study, the purpose of this study was twofold. First, to show the process for developing a pathfinder with for assessing how the end users analyze a pathfinder ("a usability test"). Second, to provide a pathfinder for fashion marketing fields. Organised especially for students of the Fashion Graduate School in Dongduk Women's University, this pathfinder included books, periodicals, Internet web sites, online stores, brands, and apparel organizations. Participants in the test evaluated the pathfinder with medium to high grade in terms of contents, classification, and quantity of resources. In particular, they acknowledged the usefulness of a pathfinder. The results could provide helpful guidelines for the design of pathfinders. In addition, this publication provides additional information that focuses on fashion marketing fields.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.34 no.6
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• pp.701-708
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• 2010

The stress and displacement fields of a permeable propagating crack in orthotropic piezoelectric materials under anti-plane shear mechanical load and in-plane electric load are analyzed. The equations of motion for the propagating crack in piezoelectric materials are developed and the solution on the stress and the displacement fields through an asymptotic analysis was obtained. The influences of the piezoelectric constant and of the dielectric permittivity on the stress and displacement fields at the crack tip are explicitly clarified. Using the stress and displacement fields obtained in this study, the characteristics of stress and displacement at a propagating crack tip in piezoelectric materials are discussed.

• Journal of the Chungcheong Mathematical Society
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• v.26 no.3
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• pp.517-523
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• 2013

In this paper we study the infiniteness of Hilbert 3-class field tower of real cubic function fields over $\mathbb{F}_q(T)$, where $q{\equiv}1$ mod 3. We also give various examples of real cubic function fields whose Hilbert 3-class field tower is infinite.

• Honam Mathematical Journal
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• v.43 no.1
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• pp.78-87
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• 2021

In this study, we firstly compute the energies and the angles of Frenet vector fields in Lorentz 5-space ��5. Then we obtain the bienergies and biangels of Frenet vector fields in ��5 by using the values of energies and angles. Finally, we present the relations among energies, angles, bienergies, and biangles with graphics.

• Journal of information and communication convergence engineering
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• v.8 no.3
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• pp.317-322
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• 2010

This paper presents an algorithm generating inverse element over finite fields GF($3^m$), and constructing method of inverse element generator based on inverse element generating algorithm. An inverse computing method of an element over GF($3^m$) which corresponds to a polynomial over GF($3^m$) with order less than equal to m-1. Here, the computation is based on multiplication, square and cube method derived from the mathematics properties over finite fields.

• Proceedings of the KSME Conference
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• 2004.04a
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• pp.1845-1850
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• 2004

The laminar impinging jet flow fields were investigated with or without magnetic fields. The transient phenomenon from steady to unsteady flow was founded at specific Reynolds number ranges. In unsteady flow region, the magnetic fields make flow stable. So the characteristics of fluid flow at impingement wall are changed

• Proceedings of the KSME Conference
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• 2004.04a
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• pp.1447-1451
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• 2004

The laminar impinging jet thermal fields were investigated with or without magnetic fields. The transient phenomenon from steady to unsteady flow was founded at specific Reynolds number ranges. In unsteady flow region, the magnetic fields make flow stable. So the characteristics of heat transfer at impingement wall are changed

• Proceedings of the KIEE Conference
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• 2005.07a
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• pp.609-611
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• 2005

In this study electromagnetic wave fields under power lines arc derived by dipole antenna theory and electromagnetic fields under 3 phase power lines with horizontal and vertical configuration are formulated. The calculation results by those formulas were consistent with the results of reference. The formulas were applied to 345[kV] and 765[kV] transmission lines constructed in our country.

• Journal of The Korean Society of Agricultural Engineers
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• v.53 no.4
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• pp.59-65
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• 2011

The purpose of this study was to analyze the water quality change when wastewater applied to study paddy fields. CREAMS-PADDY (Chemical, Runoff and Erosion from Agricultural Management System) model was used to estimate the field-scale water quality. Simulated results were compared with observed data monitored from Byeongjeom study paddy fields which is located near the Suwon sewage treatment plant in Gyeonggi-do. Significance analysis was performed for the three different irrigation water quality level and five fertilizer reduction scenarios using LSD (Least Significant Difference) and DMRT (Duncan's Multiple Range Test). Total nitrogen was found to be significant for both irrigation water quality level and fertilizer reduction while total phosphorus was not. Annual drainage load for total nitrogen was reduced by 66~92 % compared to irrigation load when treated wastewater irrigated to study paddy fields from 2002 to 2007. Total phosphorus was reduced by 70~86 %.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.6
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• pp.1441-1446
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• 2010

This paper presents a method of constructing the divider using sequential logic systems over finite fields(or galois fields). The proposed the sequential logic systems is constructed by as following. First of all, we obtain the linear characteristics between present state and next state based on mathematical properties of finite fields and sequential logic systems. Next, we realize the sequential logic systems over finite fields using above linear characteristics and characteristic polynomial which is expressed using by matrix. Also, we apply to implement divider using the proposed sequential logic systems over finite fields.