• Proceedings of the Korean Society for Information Management Conference
• /
• 2015.08a
• /
• pp.131-134
• /
• 2015

대학도서관은 연구와 교육의 센터로서 대학의 내부소속인의 교육과 연구, 학습을 뒷받침해왔다. 현대사회에서 평생교육과 자기주도 학습, 지적자유에 대한 사회적 요구가 커지면서 이제 대학도서관은 내부소속인 뿐만 아니라 외부이용자를 위한 서비스도 제공하는 이른바 지역사회 개방을 시행하고 있다. 이 연구는 지역사회 개방에 대한 선행연구들을 참고하여 지역사회 개방에 대해 알아보고, 대구지역의 대학도서관을 중심으로 지역사회 개방의 현황에 대해 구체적으로 분석하였다.

• Journal of Advanced Marine Engineering and Technology
• /
• v.39 no.3
• /
• pp.255-260
• /
• 2015

Flash evaporation phenomenon is affected by temperature, pressure and water level in the open chamber and Baffle etc. In this study, PIV experiments were conducted to ensured the flow Characteristics in the open chamber, and optimum baffle location and baffle height. Baffle had a considerable effect on the recirculation flow, hydraulic jump and the flow characteristics in the Open chamber, and influence of Reynolds number was insignificant. The optimum baffle height was about h/H=1.5. and optimum baffle location was x/H=1.5 from the inlet of open chamber.

• Journal of the Korean Society for Aeronautical & Space Sciences
• /
• v.45 no.8
• /
• pp.704-710
• /
• 2017

The supply of the liquid oxygen into a rocket combustor is simply controlled by the 'on' and 'off' positions of a main oxidizer shut-off valve. However, the partially opened position of a three-position valve can control and optimize the engine start transients by regulating the liquid oxygen flow rate during the start-up of the engine. In this paper, the design and performances of a three-position pneumatic poppet valve, which is intended to be employed in liquid rocket engines, have been presented.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.14 no.3
• /
• pp.177-184
• /
• 2014

According to broad spread of smart phone, interest for LBS is increasing. but the marine alert system for providing public LBS service. the practical use of LBS is weak because the range of tracking location is from 200M to 1KM in korea. This study try to research the methods for setting up LBS high definition open platform system, good operation of LBS system and improvement of public use of LBS.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.17 no.1
• /
• pp.253-259
• /
• 2017

As ICT industrial paradigm changes and wireless communication services evolve, demands on spectrum information are soaring. We conducted demand survey of experts and public in general on spectrum information and prioritized what we should disclose. And we looked into overseas cases and analyzed their policy, the current status, exceptions for opening spectrum information. In this paper, we suggested a direction on how to make spectrum information public in Korea. Also, we made a proposal to establish management system and legislation for opening spectrum information.

• The Korean Journal of Financial Management
• /
• v.11 no.1
• /
• pp.123-155
• /
• 1994

자본시장개방(資本市場開放)의 장기계획(長期計劃) 아래 추진된 증권시장의 개방은 국내경제를 한단계 높은 수준의 개방경제(開放經濟) 체제(體制)로 전환시키는 계기를 제공하는 혜택(惠澤)이 있는 반면에, 개방으로 유입되는 해외투자자금이 주식시장은 물론 거시경제지표(巨視經濟指標)에 부정적 영향을 미치는 경우를 배제할 수 없다. 부정적 현상으로 단기투기성(短期投機性) 자금에 의한 주가의 단기급등(短期急騰)이나 거품현상, 실물경제의 기반없는 해외부문통화(海外部門通貨) 증발(蒸發)에 따른 물가와 금리불안(金利不安), 그리고 원화의 수요증가(需要增加)로 인한 평가절상(評價切上) 압력으로 국제수지의 악화 등이다. 증시개방 이후 유입된 해외주식투자(海外株式投資) 자본(資本)이 거시경제 변수인 통화(通貨), 환율(換率), 그리고 주식시장(株式市場)에 미친 영향을 일반회귀분석, ARCH, VAR등의 모형을 통하여 연동적(連動的)인 유기관계(有機關係)를 실증적으로 분석한다. 분석 결과 통화량(通貨量)과 환율(換率)이 해외유입 자본으로 인하여 예상했던 부정적 효과를 나타냈다는 것을 입증(立證)할 근거(根據)는 찾을 수 없었다. 주가와 거래량은 해외주식 투자자금이 유인된 후 약 2주이내에 상승하였지만, 해외주식 투자자금의 유입원인(流入原因)은 주가(株價)와 거래량(去來量)의 상승세(上昇勢)로 인한 것이 아니라 주식시장의 위험도(危險度)와 잠재성(潛在性)에 비하여 주가(株價)가 저평가되어 향후 고수익율이 보장된다는 기대가 주요한 요인이라고 결론내릴 수 있다.

• Proceedings of the KIPE Conference
• /
• 2007.07a
• /
• pp.117-119
• /
• 2007

본 논문에서는 램프가 한개 이상 개방 시 피드백 제어 회로를 동작하지 않도록 하면서, 램프를 보호할 수 있는 개방전압을 출력하는 LCD 백라이트 구동용 인버터 회로도에 관한 것이다. 램프 개방전압 출력을 위한 회로는 램프 전류 피드백 블록, 개방전압시 이상신호를 감지하는 전압 피드백 블록, 램프 개수에 상관없이 최고치 값을 감지하는 블록으로 되어 있다. 전술한 회로가 내장된 인버터는 램프의 개방 시 램프의 개수 상관없이 CCFL의 보호 스펙인 2500V의 개방전압을 출력한다. 이러한 인버터가 내장된 LCD패널은 향상된 안정화 동작을 구현하게 된다.

• Journal of Elementary Mathematics Education in Korea
• /
• v.13 no.2
• /
• pp.141-161
• /
• 2009

Mathematical Communication ability can be more developed through sharing thoughts with others. Therefore when we instruct students in math, it is very important for teachers to provide them with opportunity to communicate mathematically. So this study provided open-ended problems in small-group collaborative learning. And we analyzed students' mathematical communication focused on the student's level of understanding. Furthermore, to improve students' mathematical communication ability, this study tries to attract the factors that we should consider the exact date for inserting the open-ended problems into a course of math and the student's level of understanding for selecting suitable open-ended problems.

• Proceedings of the Korean Society for Information Management Conference
• /
• 2015.08a
• /
• pp.37-45
• /
• 2015

Since 2013, Korean government announced 'government 3.0' to promote public data open policy. As a result, related websites were constructed by the government. Using these websites and public data open cases, we introduced and analyzed current domestic public open data status and case analysis in Korea Republic. For websites, websites such as 'seoul open data plaza' were selected. For related cases, websites such as 'http://www.zillow.com' and 'http://blog.safecast.org' were selected. For domestic cases, a casebook which produced by Korea 'National Information Society Agency' were used. Domestic cases referred to this article were based on this book.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.29 no.1A
• /
• pp.95-100
• /
• 2009

This study proposed mix proportions of early strength pavement concrete for large size area using calcium nitrate. Therefore, we used type III cement with calcium nitrate. Laboratory tests conducted to air content, slump loss test, setting time test, compressive strength test and flexural strength test. Our early strength pavement concrete mixture proportion proposed in this study for large size area attained the required compressive strength of 21 MPa and a flexural strength of 3.8 MPa, which allowed it to be opened to traffic within 8 hours. Based on test results, we suggested optimum mix proportions of early strength pavement concrete for large size area using calcium nitrate.