• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.637-638
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• 2015

This paper review the technical trends of ESS(Energy Storage System). The ESS has been displaced by cathode, anode, electrolyte, and separator. The lithium-ion battery is getting the most attention in the ESS. In this paper, we especially want to review a look at technology trends of the cathode and the separator for lithium-ion battery.

• Journal of the Korean Home Economics Association
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• v.43 no.8 s.210
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• pp.83-98
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• 2005

The purpose of this study is to examine consumer's relationship benefit perception for fashion products and to examine the influence of relationship benefit perception on consumer satisfaction based on consumer characteristics. Data for this research were collected by surveying 766 women older than 20 years old in Seoul, Gwangju, and Gyeonggi-do. The following is a summary of the conclusions reached from this research: (1) Relationship benefit perception was divided into five separate areas: informational benefit, emotional benefit, special treatment benefit, economic benefit and social benefit. (2) Relationship benefit perception influenced consumer satisfaction. (3) There was a difference in benefits influenced on consumer satisfaction based on consumer characteristics such as sociability, relationship preference, and price importance.

• 한국정보교육학회:학술대회논문집
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• 2006.08a
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• pp.257-262
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• 2006

PISA의 연구 결과에 따르면 컴퓨터 활용 빈도나 ICT 활용 환경 등의 양적 활용 실태는 세계적인 수준이나 프로그램이나 소프트웨어 활동 등의 컴퓨터 질적 활용 정도는 제고될 필요성이 있는 것으로 나타났다. 이는 초등 컴퓨터 교육에도 시사하는 바가 크다. 하지만 인적 물적 여건 등으로 인해 프로그래밍 교육을 초등학교 현장에 바로 적용하기에는 무리가 있다. 따라서 본 논문에서는 언어의 복잡성이 낮고 프로그래밍 단계와 과정이 간단한 HTML을 현장에 효과적으로 적용하기 위한 텍스트 에디터를 개발하고 개선점을 찾아보았다. 텍스트 에디터는 우선 태그를 직접 칠 필요가 없으며 학생들이 쉽게 학습할 수 있도록 도움말을 제시해 주었고 간단한 이미지 뷰어 기능을 통해 쉽게 이미지를 넣을 수 있도록 하였다. 개발된 텍스트 에디터의 효과를 설문지로 조사한 결과 쉽게 HTML 문서를 작성할 수 있어 학습에 도움이 된다는 점과 도움말을 제시한 부분은 긍정적으로 평가된 반면 보다 UI를 좀더 개선해야 한다는 결과가 나왔다.

• Journal of the Korean Society of Costume
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• v.54 no.6
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• pp.1-12
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• 2004

Price is one of the most important components of marketing mix. For consumers, price is an always-existing cue and definite evaluation criteria. However, information on price is meaningful only when it is perceived. Sources of price perception can be the actual retail price at the selling point, the internal reference price expected by consumers for a certain clothing product, and the external reference price advertised by marketer such as the price before mark-down. The purpose of this study was to investigate the influence of internal reference price on consumers' purchasing process of clothing products. A questionnaire including clothing stimuli was developed in order to assess consumers' internal reference price level. Usable data from 680 adult female urban residents were used for data analysis. Results indicated that consumers with relatively lower internal reference price tend to react low-price focused external reference price and use discount stores and unit price promotions. Consumers with relatively higher internal reference price advertisement are likely to have higher level of education, tend to infer price information to higher quality or prestige of products, and purchase clothing with regular retail price or coupons.

• Journal of the Korean Society of Costume
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• v.52 no.7
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• pp.57-69
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• 2002

The Purpose of this study were to find out general characteristics of apparel purchase behavior of high-income consumers, and to segment the high-income consumers according to their shopping attitude. One hundred and ninety-five high-income consumers living in Kang-nam area of Seoul were surveyed. and the following results were found : 1) high-income consumers were less conscious of 'price'. and more conscious of'prestige'and'design'compared to the ordinary consumers. (2) and prefer information they gain during store shopping to mass communication information. (3) High-income consumers were more agreed on 'price-conscious shopping attitude' than 'conspicuous' & 'hedonic shopping attitude'. (4) According to shopping attitude, high-income consumers were divided into two different segments. 'conspicuous&hedonic group' and 'reasonable shopping group', and their age, income, and purchase behavior factors were significantly different from each other.

• Proceedings of the KIPE Conference
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• 2010.07a
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• pp.73-74
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• 2010

In this paper, Around the world for electric vehicles are gaining attention and market trends to domestic and foreign policy. Current charging method developed techniques are discussed and is proposed for domestic situations and charging ways. The electric vehicle is emerging as a result of the energy efficiency issue, the combined battery and capacitor switching is proposed to use to offset the disadvantages of each method to improve the energy efficiency offers.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.66-67
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• 2016

최근 수많은 국 내외 글로벌 기업들이 클라우드 자원의 제공자 겸 소비자 역할을 하는 프라이빗 IaaS 클라우드 환경을 구축하고 있는 추세이며 이를 위해 오픈소스 클라우드 플랫폼인 오픈스택(OpenStack)이 많이 사용되고 있다. 이 논문에서는 대규모 빅데이터 처리를 위해 오픈스택 클라우드 환경의 가상머신 라이브 마이그레이션 기법을 사용할 경우 발생할 수 있는 문제점을 분석한다. 이러한 문제점에 대하여 가상머신에서 빅데이터 연산 처리 시 스토리지 병목현상을 해결하기 위한 마이그레이션 기법을 제시한다.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.49 no.6
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• pp.289-297
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• 2000

This paper presents a comparison on the resistance and characteristics of transient response of grounding systems under surge currents using frequency domain electromagnetic field analysis software package and field test. Analysis is done by computer model, based on electromagnetic field theory approach, that accurately takes into account frequency dependent characteristics of the system. The transient performance of three grounding systems is analyzed by comparison of frequency dependent impedance and the maximal transient GPR. A double exponential lighting surge current is injected at one corner of the grounding systems. The transient GPRs a rod grounding systems are higher than mesh or electrolytic grounding systems. Af field test, the results of resistance measurement and time-variant of ground resistance slightly reduce electorlytic grounding systems less than rod and mesh grounding systems.

• Proceedings of the KIEE Conference
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• 2002.11d
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• pp.200-203
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• 2002

This paper presents Continuous-current mode of $S^4$-PFC(Single-Stage Single-switch Power Factor Correction) converter. Proposed converter operates in the continueous current mode(CCM) at full load and discontinuous current mode(DCM) at light load. So, characteristic of proposed converter is no bus voltage stress and Zero Voltage Switching(ZVS) using resonant auxiliary circuit. And. This paper presents characteristic of $S^4$-PFC converter and effect of circuit parameter of proposed converter through the input inductor, PFC capacitor's variation. All of these theory and characteristic verified through the experiment with a 72W(12V, 6A), $90^{kHz}$ prototype converter.

• Proceedings of the KIEE Conference
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• 2002.04a
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• pp.186-189
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• 2002

This paper presents an improved ZVT(Zero Voltage Transition) DC/DC Boost Converter using Active Snubber. The Conventional ZVT PWM Boost Converter is improved to minimize the switching loss of auxiliary switch using the minimum number of the components. In this thesis, advantage and disadvantages of Conventional ZVT Converter using a auxiliary resonant circuit is discussed. Then Improved ZVT soft switching converter will be discussed. In comparison a previous ZVT converter, The proposed converter reduces turn-off switching loss of the auxiliary switch Therefore, the proposed converter has a high efficiency by active snubber. The prototype of 100kHz, 2kW system was implemented to show the improved performance.