• Proceedings of the KIEE Conference
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• 1996.07c
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• pp.1691-1693
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• 1996

The construction or enlargement of the power facilities requires the compactness of them, and the development of power system amenities because of some reasons; the shortness of a site for power facilities, social request of the harmony of them with surroundings, and so on. For the insulator in this area, the research and development of polymer or composite insulator or its applications have been increased rapidly in some advanced countries, but the activities of our country are being in a weak step although our concern has been gradually enlarged about it in recent years. Thus, in this paper, we intend to introduce the trend of research and development of it in the inside and outside of the country.

• Proceedings of the KIEE Conference
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• 1997.11a
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• pp.558-560
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• 1997

In recent years, it becomes a worldwide trend that the power utilities focus their attention to the automation of their power plants and distribution systems, employing recent developed communication technologies. Following this trend, KEPCO has installed optical communication links along its power distribution lines and at the same time, has exhausted much efforts to implement its own Distribution Automation Systems(DAS) in possible early date. This paper presents some of initial design efforts toward KEPCO's DAS at KEPRI.

• The Research Journal of the Costume Culture
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• v.9 no.1
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• pp.141-153
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• 2001

In the midst of rapid cultural and artistic changes with the turn of the century, postmodernism is exerting great influence on the value and trends of arts. many artists are making utmost efforts in order to overcome ambiguity and confusion caused by these changes. Analysis of the works and philosophy of prominent fashion designers provides insight into the influence of postmodernism to the creation of modern arts including fashion. This paper attempts to explore how pluralism, one o the most important features of postmodernism, has given impacted to the modern fashion design. fashion trend and works of Paco Rabanne were reviewed with particular emphasis on pluralistic expressions in his fashion creation. it was found that Paco Rabanne's diversified and innovative use of materials and design methods were possible due to the influence of pluralism. It is anticipated that this trend will e observed in the various forms of arts wit the further analysis of fashion designers and artists.

• Proceedings of the KIPE Conference
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• 2002.07a
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• pp.593-597
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• 2002

The power conversion system for Fuel Cell Electric Vehicle(FCEV), technical trend, and a various type of Fuel Cell and its characteristics are presented. Especially, this paper is focused on the control methods of power conversion devices applied for the Fuel Cell Electric Vehicle, configuration of power system and operation mode of the bidirectional DC/DC converter. The prevalent topology for the power conversion systems, simulation results and development a tendency of FCEV and it's market investigations are introduced.

• Proceedings of the KIPE Conference
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• 2003.07b
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• pp.998-1001
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• 2003

Recent trend of sensor-less control of induction motor applied for commuter trains in Japan is introduced. Although many inverter-fed induction motor driven trains have been produced so far, most of them were slip frequency based conventional V/f control system using shaft encoder. There arises a new trend to apply speed sensor-less vector control., for this inverter-fed induction motor drive system. The purpose of sensor-less control is to save, cost and improve system reliability. Several sensor-less systems now under testing on the actual railway company. This paper describes the survey of the fundamental structure and feature of representative sensor-less systems mentioned above.

• Proceedings of the KIEE Conference
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• 1999.11d
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• pp.1025-1027
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• 1999

Recently, many researches on a diagnosis of stator winding insulation of large generators are reported. They mostly utilize a trend analysis of Partial Discharge (PD). In this paper, a novel on-line monitoring system for an insulation diagnosis is proposed. This system obtains the parameters such as Maximum Partial Discharge Magnitude (QM), Normalized Quantity Number (NQN) and Dynamic Stagnation Voltage (DSV) by continuous on-line monitoring of winding insulation. It is capable of diagnosing the insulation condition by analyzing the trend of PD and utilizing the database built by the system.

• Journal of Surface Science and Engineering
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• v.45 no.1
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• pp.43-52
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• 2012

Recently, it has been developed for Eco-environment, Super light, Multi-functional nano materials. As needed mobile parts in Smart phone or TV, computer, information communication for high pass signal, multi-function, Magnetic thin film materials have been developed. As last, magnetic powder, sintered and sputtering parts were thick and low purity than electroplating layer, low pass signal and noise were resulted, vibrated TV screen. Because chemical complex temperature was high and ununiform surface layer, it has been very difficult for data pass in High Frequency (GHz) area. Large capacity data pass is used to GHz. Above GHz, signal pass velocity is dependent on Skin Effect of surface layer. If surface layer is thick or ununiform, attachment is poor, low pass signal and cross talk, noise are produced and leaked. It has been reported technical trend of Electrochemically plating and Surface treatment of Metal, Polymer, Ceramic etc. by dispersion/complex for Multi functional nano-magnetic material in this paper.

• Journal of the Korea Convergence Society
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• v.4 no.1
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• pp.15-20
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• 2013

Game engines that allow you to reuse the necessary software components in the development of the game. There are representative game engines such as unreal engine, cry engine, unity3D engine. This paper describes recent game engine technologies, discuss next game engine trend focused on those game engines. And then, proposes educational methods on game production.

• Journal of the Korea Furniture Society
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• v.27 no.3
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• pp.197-202
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• 2016

One of the conspicuous changes in kitchens is that kitchen space is more economically constructed than ever before giving more considerations to functionality. At the same time, eco-friendliness begins enjoying more attention for health and well-being reasons. Which is more important between functionality and eco-friendliness is a matter of personal taste and judgement. But eco-friendliness has become one of the more critical criteria for users to choose kitchen furniture. This paper examines the design trends of Contemporary kitchen furniture from the perspective of functionality and eco-friendliness. Results show that, as has been expected, many of kitchen furniture items manufactured by major furniture businesses have been found more functional and more eco-friendly than before the research period. I expect this trend to continue long into the future.

• Communications for Statistical Applications and Methods
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• v.14 no.3
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• pp.667-677
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• 2007

In this paper, we propose a method for estimating the mean of a population which has a linear trend, when both n, the sample size, and k, the reciprocal of the sampling fraction, are odd numbers. The proposed method, not having the drawbacks of centered systematic sampling, centered modified sampling and centered balanced sampling, consists of selecting a sample by balanced systematic sampling and estimating the population mean by using interpolation. We compare the efficiency of the proposed method and existing methods under the criterion of the expected mean square error based on the infinite superpopulation model.