• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2007.11a
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• pp.226-227
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• 2007

Nanostructured materials are attracting increased interest and application. Exciting perspectives may be offered by electrical insulation. Epoxy/Organoclay nanocomposites may find new and upgraded applications in the electrical industry, replacing conventional insulation to provide improved performances in electric power apparatus, e.g, high voltage motor/generator stator winding insulation, dry mold transformer, etc. This paper shows that electrical and thermal properties of epoxy/organoclay nanocomposites insulating materials for dsc, dielectric constant, I-V characteristics, breakdown volatge, can improve significantly with respect to the basic, virgin materials.

• Journal of Preventive Medicine and Public Health
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• v.39 no.4
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• pp.289-292
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• 2006

To inform choices about the future of people who study public health and preventive medicine, the current status of public health is examined in terms of the public health sector in government. After tracing the major achievements of public health in the modern era, this paper explores the potential of public health and its core functions, which is realized by public health professionals working in the government sector. Finally, this article highlights the international dimension of public health, which is becoming increasingly important and therefore attracting many people who would like to take part.

• Korean Journal of Organic Agriculture
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• v.10 no.2
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• pp.51-66
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• 2002

It is almost impossible to aggregate environment-related information, simply because it is vast. Therefore, Recently, the development of an environmental index is attracting the attention in Korea and other nations, since it is taken to be useful for legislating environmental policies. When it comes to the development of an environmental index, the first necessary step is to organize environmental information by using an accounting framework that manifests outstanding consistency and inclusiveness. And then, this organized environmental information should be appropriately used, whenever required. Compared to these movements, it is necessary to point out that the environmental accounts in the agricultural section still suffer from numerous problems that need to be solved. According1y, this dissertation suggests and considers at least the following three matters. First of all, an integrated index evaluation method should be developed, taking domestic and foreign movements into consideration at the time of conducting the environmental evaluation. Secondly, a master plan for the environmental accounts should be developed for the agricultural sector. And thirdly and finally, problems and solutions incurred during the process of performing the aforementioned tasks need to be examined in detail.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 1997.10a
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• pp.154-159
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• 1997

In this paper, we describe the OGY method that convert the motion on a chaotic attractor to attracting time periodic motion by malting only small perturbations of a control parameter. The OGY method is illustrated by application to the control of the chaotic motion in chaotic attractor to happen at the famous Logistic map and Henon map and confirm it by making periodic motion. We apply it the chaotic motion at the behavior of the thin beam under periodic torsional base-excitation, and this chaotic motion is made the periodic motion by numerical experiment in the time evaluation on this chaotic motion. We apply the OGY method with the Jacobian matrix to control the chaotic motion to the periodic motion.

• The Korean Journal of Health Service Management
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• v.13 no.4
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• pp.95-107
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• 2019

Objectives: The purpose of this study was to examine the quality and reputation of medical services in hospitals run by Gangwon-do 1,3, and 10 dentists, to investigate the mitigation effects of trust and quality on patient satisfaction and loyalty. Methods: Of the 600 surveys collected, 578 were used. Results: Although there were differences in dental services by type of institution, fame influenced patient satisfaction in all three institutions, and patient satisfaction also affected loyalty in all three institutions. The moderating effect of trust was shown to one dentist, and physician trust was shown to have a moderating effect. Conclusions: The establishment of reputation trust and the practice of dental medical services are important for attracting patients.

• Journal of the Korean Society for Heat Treatment
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• v.33 no.6
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• pp.296-302
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• 2020

Magnesium alloys have been rapidly attracting as lightweight structural material in various industry fields because of having high specific strength and low density. It is well known that the crystallographic texture plays an important role in improvement of poor room temperature ductility of magnesium alloys. In this study, high-temperature plane strain compression deformation was conducted on extruded AZ80 magnesium alloy at 723K by varying the strain rates ranging from 5.0×10^-3s^-1 to 5.0×10^-2s^-1 in order to investigate the behaviors of texture formation. It was found that texture formation behaviors in three kinds of specimens were affected by continuous and discontiuous deformation mechanism.

• Journal of the Korean Mathematical Society
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• v.41 no.1
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• pp.1-20
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• 2004

Let A be a uniform algebra, and let $\phi$ be a self-map of the spectrum $M_A$ of A that induces a composition operator $C_{\phi}$, on A. It is shown that the image of $M_A$ under some iterate ${\phi}^n$ of \phi is hyperbolically bounded if and only if \phi has a finite number of attracting cycles to which the iterates of $\phi$ converge. On the other hand, the image of the spectrum of A under $\phi$ is not hyperbolically bounded if and only if there is a subspace of $A^{**}$ "almost" isometric to ${\ell}_{\infty}$ on which ${C_{\phi}}^{**}$ "almost" an isometry. A corollary of these characterizations is that if $C_{\phi}$ is weakly compact, and if the spectrum of A is connected, then $\phi$ has a unique fixed point, to which the iterates of $\phi$ converge. The corresponding theorem for compact composition operators was proved in 1980 by H. Kamowitz [17].

• Coupled systems mechanics
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• v.6 no.1
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• pp.75-96
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• 2017

As electron donor/acceptor materials for organic photovoltaic cells, small-molecules donors/acceptor are attracting more and more attention. In this work, we investigated the electronic structures, electrochemical properties, and charge carrier transport properties of four recently-synthesized small-molecule donors/acceptor, namely, DPDCPB (A), DPDCTB (B), DTDCPB (A1), and DTDCTB (B1), by a series of ab initio calculations. The calculations look into the electronic structure of singly oxidized and reduced molecules, the first anodic and cathodic potentials, and the electrochemical gaps. Results of our calculations were in accord with those from experiments. Using Marcus theory, we also computed the reorganization energies of hole/electron hoppings, as well as hole/electron transfer integrals of multiple possible molecular dimer configurations. Our calculations indicated that the electron/hole transport properties are very sensitive to the relative separations/orientations between neighboring molecules. Due to high reorganization energies for electron hopping, the hole mobilities in the molecular crystals are at least an order of magnitude higher than the electron mobilities.

• Journal of Korean language education
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• v.28 no.2
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• pp.235-264
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• 2017

The purpose of this study is to explore and categorize the rhetorical strategies of text construction in research articles and to provide data for academic writing education for foreign graduate students. This study analyzes 30 research articles by Korean writers from Korean language and Korean language education fields, and categorizes the rhetorical strategies according to the roles of the writer as a RA form composer, a manager of research content, and a communicator. On the basis of the strategies, this study analyzes 18 term papers of foreign graduate students and inspects their weaknesses in using the rhetorical strategies. Based on the results of analysis, this study suggests rhetorical strategy education for KAP learners that emphasizes validity and clarifies argument along with attracting readers.

• Annual Conference of KIPS
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• 2012.11a
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• pp.799-801
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• 2012

Wireless Mesh Network (WMN) can be defined as a communication network consisting of radio nodes organized in a mesh topology, which has been attracting much attention due to its promising technology. This paper addressed the factors on how to design routing protocols for WMN. 2 examples of designing routing metric and routing algorithm are given for case study. With consideration of those factors such as wireless broadcast advantage (WBA)/channel assignment (CA) or intra-flow/inter-flow interference high throughput is achieved.