• 전력전자학회:학술대회논문집
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• 전력전자학회 2004년도 전력전자학술대회 논문집(1)
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• pp.141-143
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• 2004

Distributed generation(DG) using microturbine will be adopted widely because of its various usages and merits such as high heat efficiency, environmental-friendliness. Commercialized DG using microtubine that rotates up to $60,000\~100,000[rpm]$ converters mechanical power to electricity by permanent magnet synchronous machine. This paper presents comparative test and simulation results of PMSM as generator. Test was done by diode rectifier and inverter. Parameters used in the simulation are driven from FEM analysis. Under various speed and load conditions, V-I characteristics matches well and it suggests the possibility of high speed PMSM as generator. DG operating at stand alone and grid connection mode will be developed.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1997년도 춘계학술대회 논문집
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• pp.111-115
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• 1997

There exists a interface among the different kinds of materials in the solid insulating ones, which effects on the insulating capability heavily. The insulating construction has been developed for each usages and take themselves into several sorts. The conjunction between CV cables have the electrical weakness of solidity and solid interface, so they were focused at the long distance-line. To this background, it is very important to get the information on the interface influencing on the insulating capability of cable and to observe its procedure. In this paper, the interface was made artificially to research the effect owing to the toughness of interface, which results in the aging and treeing proceeding was observed. The polyethylen, as is generally using for the cable, was taken in this research.

• International Journal of Knowledge Content Development & Technology
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• 제4권2호
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• pp.25-47
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• 2014

The goal of the present study is to explore IM interruption by relating it to media choices and purposes of IM use in the workplace. Two major media choice concepts were: media richness and social influence; while four purposes of IM use were: organization work, knowledge work, socializing, and boundary spanning activities. Data (N = 283) were collected via a combination of convenience and snowball sampling of "computer-using workers" in Taiwan, based on the Standard Occupational Classification system published by the Taiwan government. Results indicated that media choice works better than purpose of IM use to explain IM interruption. Among them, social influence was the best predictor to IM interruption in the workplace. In addition, instant feedback and personalization provided by IM, and IM usage for the purposes of knowledge work and socializing, also relate to IM interruption in the workplace.

• 한국환경교육학회지:환경교육
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• 제10권2호
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• pp.325-338
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• 1997

Review of the global change in various energy usages and resulting environmental impacts were made in terms of population increase, economic development and energy consumption. Greater use of fossil fuels in past couple of centuries give rise to acid rain and gradual climate changes mainly due to Green House inducing gases emissions from fossil fuel combustion. In view of the forthcoming Kyoto conference in December, various alternative options were assessed. To cope with rapidly developing robust Korean economy, the alternative energy options for the sustainable development in 21st Century would be the wider use of Nuclear Energy in parallel with constrained use of fossil fuel and renewable energy development. However there are many hurdles to overcome. One of the most important element is to improve public acceptability of those alternatives. Since public acceptance depend heavily upon individual perception on specific energy technology applications, the basic energy technologies education from primary up to high school education and the related curriculum organization is important. The suggested improvement in education for Nuclear Energy Application was made on the basis of advanced industrial countries with substantial Nuclear Energy Application programs.

• 복식문화연구
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• 제9권3호
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• pp.501-510
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• 2001

This study is focused on apparel textile design process applying pre-developed Korean traditional motifs. Since the fusion culture is in trend, Orientalism or Oriental look is the center of attraction in fashion. Under the circumstances, developing the traditional resources as sophisticated Korean-style is the goal of the BK21 team. This study makes a move to achieve the goal. As a method of accomplishing this study, 4 trendy motif samples such as stylized letter, butterfly, peony, and female face are selected after investigating fashion magazines and fashion related websites. As a result, pre-developted Korean traditional motifs are elected and revised using Adobe Illustrator 9.0. The newly revised motifs are applied to the textile pattern repeat form. The completed textile patterns are simulated on the simulated on the shawls to show their usages as one of souvenir items since the year of 2001 is the year of “Visit Korea”.

• 한국수소및신에너지학회논문집
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• 제18권4호
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• pp.439-445
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• 2007

Proton exchange membrane Fuel Cells(PEMFCs) have been spotlighted because of their broad potential application for potable electrical devices, automobiles and residential usages. However, their utilization is limited to low temperature operation due to the electrolyte dehydration at high temperature. High temperature PEMFC operation offers high CO tolerance and easy water management. This review presents development of high temperature($120{\sim}200^{\circ}C$) PEMFC. Especially, PEMFC which is based on acid-doped PBI membrane is discussed.

• 한국영어학회지:영어학
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• 제1권2호
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• pp.295-309
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• 2001

The simple forms in English have mostly been investigated in terms of tense, especially by those who do not distinguish between tense and aspect in English. However, we often find some usages of the simple forms that do not seem to fit in any of the meanings of tense. The purpose of this paper is to find aspectual meanings out of the simple present and past forms by re-analyzing their meanings in terms of aspect. It turns out that they represent the perfective aspect seeing a situation as a whole with no beginning. middle and end. As for the controversial stative situations in the simple forms, they have been proven to show the perfective aspect, too, if we agree to see both the part and whole in state as having the same features. And syntactic evidences from the simple forms and their corresponding progressive forms compared also show that the habitual dynamic situations represent the same aspect in the simple forms.

• 한국게임학회 논문지
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• 제2권2호
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• pp.72-77
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• 2002

오늘날 사운드 컨텐츠는 DVD의 등장으로 CD음질이상인 3D서라운드 오디오를 기본으로 하는 추세이다. 이에 맞춰 컨텐츠 개발환경이 보다 진보되어야하며, 이러한 시스템의 효과적인 응용이 필요하다. 게임 및 멀티미디어 사운드컨텐츠 제작에 필수적인 시스템 장치인 Sound/Audio Card의 효과적인 이용을 위한 개선방법과 3D사운드제작에 필요한 관련지식과 제작 Tool의 사용방법과 응용을 연구하였다.

• 한국지능시스템학회논문지
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• 제11권5호
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• pp.400-405
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• 2001

This paper addresses an effective approach of training neural networks classifiers for credit card fraud detection. The proposed approach uses evolutionary programming to trails the neural networks classifiers based on maximization of the detection rate of fraudulent usages on some ranges of the rejection rate, loot minimization of mean square error(MSE) that Is a common criterion for neural networks learning. This approach enables us to get classifier of satisfactory performance and to offer a directive method of handling various conditions and performance measures that are required for real fraud detection applications in the classifier training step. The experimental results on "real"credit card transaction data indicate that the proposed classifiers produces classifiers of high quality in terms of a relative profit as well as detection rate and efficiency.

• 통상정보연구
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• 제9권1호
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• pp.119-148
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• 2007

The purpose of this research is to study whether environments of participating firms of electronic marketplace(e-MP) have an influence on usage factors which are supplying from e-MP and usage factors affect usage performances. Based on the existing researches we found variables and executed a empirical study of environment-usage-performance model. Through this research we suggested useful factors for the performance of trade enterprises. Usage factors of e-MP will overcome geographical limitation and acquire new sales areas and simultaneously widen the relationships of global enterprises. Those firms could be accessible into global market promptly. To enhance usages of e-MP, service quality which can satisfy both buyer and seller at the same time should be strengtened. Finally, the usage of e-trade information should also heighten through usage factors.