• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2002년도 하계학술대회 논문집 A
• /
• pp.63-66
• /
• 2002

본 논문에서는 북한 및 남한의 수도권 지역을 중신으로 한 부하집중지역들의 전력 부족을 해결하기 위한 대안으로서 신포에 세워질 2000MW의 원자력을 이용할 수 있는 방안을 검토하고자 한다. 특히 남한은 향후 계측적인 전력 수요의 증가로 인한 발전력의 부족을 해결할 마땅한 대책이 없으리라 여겨진다. 이러한 문제에 있어 해결책은 첫째로 북한의 2000MW KEDO 원전에서 북한의 일부 부하집중지역 (특히 평양주변)에 공급하면서 남한의 수도권지역에 전력을 공급하는 것이 가능한 대안 중의 하나로 여겨진다. 본 논문에서는 KEDO 원전의 전력을 흘려보내기 위한 시나리오 작성 및 진력 조류흐름을 파라하는 것을 목적으로 한다. 시뮬레이션은 미국 PTI사의 PSS/E 패키지를 사용하였으며, 조류 계산을 하여 그 결과를 전력흐름도로 작성하고 비교 검토하였다.

• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2002년도 추계학술대회논문초록집
• /
• pp.323.1-323
• /
• 2002

The transmission loss coefficient is very important acoustic property in parallel with absorption and acoustic impedance categorizing the acoustical materials, which can control the acoustical problems. At the same time, the transmission loss coefficient is a key parameter to choose the optimum material for the analysis of acoustical characteristics of material using SEA(Statistical Energy Analysis). In this paper, the transmission loss coefficient measurement system usiong 4-microphone impedance tube is proposed, based on the idea calculating the full transger matrix of the acoustical sample to test. The theoretical backgroung and measurement system are introduced, and finally the measurement results are verified.

• 제어로봇시스템학회논문지
• /
• 제10권6호
• /
• pp.501-509
• /
• 2004

The frequency of car accidents is very high at the intersection. Because of the state of a traffic signal, quarrels happen after accidents. At night many cars run away after causing an accident. In this case, accident analyses have been conducted by investigating evidences such as eyewitness accounts, tire tracks, fragments of the car or collision traces of the car. But these evidences that don't have enough objectivity cause an error in judgment. In the paper, when traffic accidents happen, the traffic accident detection system that stands on the basis of images and sounds detects traffic accidents to acquire abundant evidences. And, this system transmits 10 seconds images to the traffic center through the wired net and stores images to the Smart Media Card. This can be applied to various ways such as accident management, accident DB construction, urgent rescue after awaring the accident, accident detection in tunnel and in inclement weather.

• 한국독성학회:학술대회논문집
• /
• 한국독성학회 2003년도 춘계학술대회 논문집
• /
• pp.75-75
• /
• 2003

Silica has been known to be a factor in acute cell injury and chronic pulmonary fibrosis. In Rat2 fibroblasts, silica induced the activation of NFkB, which plays a crucial role in regulating the expression of many genes involved in the subsequent inflammatory response. In addition, we observed that TAK1 and NIK were involved in silica-mediated NF-kB activation in Rat2 cells. (omitted)

• Preventive Nutrition and Food Science
• /
• 제8권1호
• /
• pp.93-95
• /
• 2003

• 한국측량학회:학술대회논문집
• /
• 한국측량학회 2004년도 추계학술발표회 논문집
• /
• pp.23-27
• /
• 2004

The National Geographic Information Institute of Korea and the Geographical surveying Institute of Japan carried out the GPS joint observation about Korea-Japan original Baseline in 2003 which had been connected for the first time between two countries since 1910. At the results, the orignal baseline produced by the GPS observations coincides with the geodetic results of 1910s within 40cm. Thus the observation results suggest that the surveying technique at that time must have been high level. and also it is confirmed what the world geodetic system adopted by Korea and Japan is matched well.

• 자원ㆍ환경경제연구
• /
• 제14권3호
• /
• pp.627-653
• /
• 2005

본 연구는 외국의 환경규제 수준과 한국의 수출 사이의 관계에 대한 실증분석으로서, 82국가에 대한 2001년 수출자료를 이용하였으며 중력모형을 기본모형으로 하여 회귀분석한 결과 다음과 같은 결과를 얻었다. 첫째, 전체산업에 대하여 환경규제가 수출에 미치는 효과를 분석한 결과 환경규제가 강한 나라일수록 우리나라의 수출이 증가하고 있다. 둘째, 환경오염산업으로 분류된 17개 산업에 대하여 개별적으로 분석한 결과, 대체로 환경규제변수의 영향이 존재하지만 개별 산업에 따라 그 영향의 정도는 다르며 전체적으로는 매우 큰 영향이 있다고 보기는 힘들다.

• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2003년도 춘계학술대회논문집
• /
• pp.1206-1212
• /
• 2003

Shell vibrations of the rotary compressor, which account for considerable portion of the noise from compressor, are caused by various sources. Among them is the vibration of the in nor part or cylinder assembly, which undergoes severe compression process and rotational motion. But little researches have been carried out about the behavior and effect of the inner part because of its structural complexity. Furthermore, the shell of the rotary compressor is hermetic type that experimental approach is very difficult. This research studied the structure-born noise of the Rotary compressor using FE an analysis. The comparison between sound pressure spectrum and natural frequencies of the shell vibration implies that shell vibrations contribute significantly to the noise. It is found that inner part vibrations are responsible for those through the FE analysis. Design modification of the inner part, which shifts the target frequencies, reduced overall noise level of the compressor.

• 대한치과기공학회지
• /
• 제7권1호
• /
• pp.53-59
• /
• 1985

This paper aims to examine baes metal alloy in all its aspects - the roles of elements, the content of every element according to uses, characters, laboratory technique methods and the kind of artificial base metal alloy registered in A.D.A. Specification. The results are as follows; 1. Base metal alloy is used widely bacaues it is rather cheap, but it should be handled appropriately in operating because its quality is bad. 2. Classifying base metal alloy, it is classified into Co-Cr alloy, Ni-Cr alloy, and Ni-Cr-Co alloy according to element, it is classified into partial denture alloy, surgical alloy and crown & bridge alloy according to use. 3. Among elements of base metal alloy, Bellium lowers the melting point of the alloy and increases the strength, but the amount should be limited when it is used because it destroys the organization of a living body. 4. The investments for base metal alloy are ethyl silcate bonded investment and phosphate bonded investment which endure well at high burn out temperature. 5. A.D.A specification No.14 in Kore contains Niranium, Nobilium, regalloy, Ticonium and Vitallium.

• Current Optics and Photonics
• /
• 제5권2호
• /
• pp.180-185
• /
• 2021

A femtosecond-laser inscribed Yb:YAG surface channel waveguide (WG) laser with single-walled carbon nanotubes deposited on the top surface of the WG was passively Q-switched by evanescent field interaction. Q-switched operation of the 14-mm-long compact Yb:YAG WG laser was achieved near 1031 nm with two different pumping schemes (single- and double-pass pumping) with an output coupling transmission of 91%. The Q-switched pulse characteristics depending on the absorbed pump power were investigated for both pumping geometries and analyzed in detail based on theoretical modeling. The best performances (energy/pulse duration) for each configuration were 204.4 nJ/75 ns at a repetition rate of 1.87 MHz, and 201.1 nJ/81 ns at 1.75 MHz for single- and double-pass pumping, respectively.