• 대한예방의학회:학술대회논문집
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• 대한예방의학회 2002년도 제54차 추계 학술대회 연제집
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• pp.241-242
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• 2002

• 한국문헌정보학회지
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• 제54권1호
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• pp.115-143
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• 2020

본 연구에서는 개관시간 연장지원 사업이 가진 정보 접근성 향상, 생활복지 구현 등의 목적에 맞는 지속적인 운영을 위해 개관시간 연장지원 사업에 참여하고 있는 도서관 현황 및 만족도 조사를 실시하였다. 이를 위해 도서관별 개관시간 연장지원 사업담당자를 대상으로 설문과 면담조사를 실시하였으며, 연구 결과는 다음과 같다. 첫째, 개관시간 연장지원 사업은 지역의 특성과 환경에 맞는 전략이 필요한 사업으로써 지역 중심의 운영계획을 마련을 통해 향후 국가지원에 의존하기 보다는 독립적으로 운영하는 방안을 고려해야 한다. 둘째, 직원과 이용자 모두가 납득할 수 있는 유연한 개관시간 연장 운영 모델을 구축하는 것이 필요하다. 셋째, 소기존 정규직에 준하는 권리와 함께 의무와 책임을 함께 요구하는 조직 운영 방안을 마련하는 것이 필요하다. 넷째, 우리나라 전국 공공도서관이 특정 정책 및 사업에 대해 일관된 정책을 마련하고 시행하기 위해서는 향후 분리되어 있는 공공도서관 운영체계를 일원화 할 필요성이 있다. 다섯째, 사업의 지속성과 안정적인 운영을 위한 교육 및 지침 마련이 필요하고, 이용자의 쾌적한 이용을 위한 공간 개선 지원 등 인건비 외의 서비스 활성화를 위한 지원이 필요하다.

• 한국생산제조학회지
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• 제24권5호
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• pp.553-560
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• 2015

Fracture mechanics analysis for cracked pipes is essential for applying the leak-before-break (LBB) concept to nuclear piping design. For LBB assessment, crack instability and leak rate should be predicted accurately for through-wall cracked pipes. In a nuclear piping system, elbows are connected with straight pipes by circumferential welding; this weld region is often considered a critical location. Hence, accurate crack assessment is necessary for cracks in the interface between elbows and straight pipes. In this study, the stress intensity factor (SIF) and elastic crack opening displacement (COD) were estimated through detailed 3D elastic finite element (FE) analyses. Based on the results, closed-form solutions of shape factors for calculating the SIFs and elastic CODs were proposed for circumferential through-wall cracks in the abovementioned interfaces under internal pressure. In addition, the effect of the elbow on shape factors was investigated by comparing the results with the existing solutions for a straight pipe.

• 한국지반신소재학회논문집
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• 제6권1호
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• pp.33-38
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• 2007

연직배수재는 필터와 코어로 형성되며, 필터의 주요기능으로 첫째, 흙 입자의 유실을 방지할 수 있는 흙 보유성과 둘째, Clogging 또는 Blinding현상 발생 없이 간극수를 원활히 배출시키는 투수성을 갖추어야 한다. 상대적으로 투수성이 낮은 지반에서 미세입자로 인하여 필터의 투수성을 저하시키는 필터폐색(Clogging) 현상이 발생하는데 필터의 폐색현상(Clogging)이 점진적으로 증가하면, 간극수의 흐름을 저하시켜 결국 압밀지연을 초래한다. 지반-필터의 거동에 따른 설계(시방)기준은 토목섬유 필터의 간극크기와 흙의 입도의 상관관계에 의해 결정되어야 하나, 국내에서는 필터폐색(Clogging)현상과 지반-필터의 거동 분석 없이 필터재의 유효입경(AOS, Apparent Opening Size)만을 고려하여 필터의 설계(시방)기준을 일률적으로 적용하고 있다. 따라서, 본 연구에서는 3가지 종류의 연직배수재 필터를 대상으로 필터의 거동 및 필터폐색(Clogging)현상을 평가하고자 실내시험을 수행하였고, 이를 토대로 ${\bigcirc}{\bigcirc}$지역에서 연직배수재 필터의 설계(시방)기준을 선정하여 적용하였다.

• 한국컴퓨터정보학회논문지
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• 제20권11호
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• pp.175-181
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• 2015

In this paper, based on the reference, we try to review the second issues about opening medical market and health care privatization by each topic and propose the measures and alternatives. Currently, in Korea, connection with launch of the WTO system and force of the FTA, the medical industries getting liberalization and globalization. Thus, it is expected to plunge to full-free competition system, and Korean medical institutions started the global competition which completely different dimension. It means that according to the liberalization of the healthcare market the real problem can be caused and also, the incessant discussion and effort for the implementation of international community are needed. Regard to attracting foreign patients and opening medical markets, the government also spreading the continued advancement strategy politically until now. However, generating problems with implication is inevitable and measures and alternatives to it are also needed. In accordance with the opening, the accompanying suggestions is medical privatization, that is, whether the health care pursue the profit not the not-for-profit and the current hospitals in Korea they are leaved as non-profit hospitals and let the make the subsidiary as general commercial enterprises, it seems indirect. However, it is like a healthcare privatization virtually thus, implication seem be large. Of course, through the public opinion and legal reservation, the liberalization and privatization of medical market can be delayed or not forced. It would be not fit in the flow of the inevitable globalization, it can be inhibited national interest and economic development also, and it can be the critical implications which shake the health system and collapse of the domestic health care market.

• Journal of information and communication convergence engineering
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• 제8권2호
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• pp.238-243
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• 2010

CSD is Active RFID based Container Security Device which is proposed by the U.S Department of Home Security. It is mounted inside the container to sense opening of the container door. ConTracer is the CSD which is developed in this research whose major features are sensing door opening status as well as history inquiring on internal environment and shock to the container by mounting the temperature/ humidity/ shock sensors. Moreover, its RFID frequency bandwidth uses 433MHz and 2.4GHz to correspond actively to the frequency used by different countries. This paper introduces the development trend of CSD, compares the ConTracer which is developed thru this research and other company's CSD, and introduces CSD System which is designed and established using ConTracer. Finally, the implemented CSD System is verified by applying the demonstration service to container distribution between Korea and China.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.237-240
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• 2003

Gas turbines are extensively used in flight propulsion, electrical power generation, and other industrial applications. During its life span, a turbine blade is taken out periodically for repair and maintenance. This includes re-coating the blade surface and re-drilling the cooling holes/channels. A successful laser re-drilling requires the measurement of a hole within the accuracy of ${\pm}0.15mm$ in position and ${\pm}3^{\circ}$ in orientation. Detection of gas turbine blade/vane cooling hole position and orientation thus becomes a very important step for the vane/blade repair process. The industry is in urgent need of an automated system to fulfill the above task. This paper proposes approaches and algorithms to detect the cooling hole position and orientation by using a vision system mounted on a robot arm. The channel orientation is determined based on the alignment of the vision system with the channel axis. The opening position of the channel is the intersection between the channel axis and the surface around the channel opening. Experimental results have indicated that the concept of cooling hole identification is feasible. It has been shown that the reproducible detection of cooling channel position is with +/- 0.15mm accuracy and cooling channel orientation is with +/$-\;3^{\circ}$ with the current test conditions. Average processing time to search and identify channel position and orientation is less than 1 minute.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.137-140
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• 2003

To the optimization design of molded case circuit breakers(MCCBs), it is necessary and important to calculate the electro-dynamic repulsion force acting on the movable conductor. With 3-D finite element nonlinear analysis, according to the equations among current-magnetic field-repulsion force and taking into account the ferromagnet, contact bridge model is introduced to simulate the current constriction between contacts, so Lorentz and Holm force acting on the movable conductor and contact, respectively, can be integrated to calculate. Coupled with circuit equations, the opening time of movable contact also can be obtained using iteration with the restriction of contact force. Simulation and experiment for repulsion forte and opening time of five different configuration models have been investigated. The results indicate that the proposed method is effective and capable of evaluating new design of contact systems in MCCBs.

• 한국경제지리학회지
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• 제19권4호
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• pp.743-763
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• 2016

본 연구는 개혁개방 이후 형성된 사회주의 시장경제 하 중국 주택체제의 성격을 중국의 공공주택 정책인 보장성 주택 정책을 중심으로 주택시스템 비교연구의 관점에서 분석하였다. 중국 주택시스템의 전환은 시장기능의 도입과 사회주의 토지공유제의 약화라는 점에서 차별적인 '사회주의 시장경제 주택시스템'의 형성이 아닌, 자본주의 주택시스템의 하위유형으로 전환한 것으로 볼 수 있다. 이것은 기존 정부 공급형 계획의 사회주의 방식이 정부의 간접적인 개입과 조정에 따라 시장요소를 통해 주택이 공급되는 정부 주도형 시장화의 방식으로 전환한 것이며, 정부가 가지는 시장주도력은 사회주의적 토지소유의 유산에 기반하고 있다는 점에서 차별화된다.

• 한국항공운항학회:학술대회논문집
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• 한국항공운항학회 2016년도 춘계학술대회
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• pp.269-275
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• 2016

This paper considers the arrival, airport and departure capacity as a whole, through which, the network effect between airports is fully emphasized, the flight action is coordinated, and the flight demand pattern is reasonably assigned. The optimization problem of flight queues in multi-airport is studied in detail; the mathematical model of multi-airport opening non-real time flow management in terminal area is established, and related problems such as the parameters, the simplification and the solving of the model are discussed in detail to some extent. Appropriate decision making variables are taken to make the multi-airport network system linear 0-1 integer programming model, thus, the solving of the model is available and the central flow management is realized. The heuristic implicit enumeration presented in this paper can effectively solve this kind of problems. Through the simulation of some airports network system, we not only validate the algorithm presented in this paper, but also give a deep analysis of the results, which would produce reference for later practicable use. The simulation proves that this algorithm offers a good way to settle the problem of multi-airport flight queue optimization in air traffic management automation system in terminal area.