• The Bulletin of The Korean Astronomical Society
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• v.37 no.2
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• pp.205.1-205.1
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• 2012

러시아 발사체 드네프르에 의해 발사될 과학기술위성 3호의 주탑재체 다목적적외선영상시스템, MIRIS (Multipurpose InfraRed Imaging System)는 한국천문연구원에서 주관하여 개발되었다. 그 구성 카메라인 EOC (Earth Observation Camera)는 한반도재난감시를 수행하고, SOC (Space Observation Camera)는 우리 은하 평면의 근적외선 서베이 관측을 통해 $360^{\circ}{\times}6^{\circ}$ Paschen-${\alpha}$ 방출선 지도를 작성하고 I, H 밴드 필터를 이용해서 황도 남북극에 대한 적외선우주배경복사를 관측한다. MIRIS 비행모델이 제작 완료되었고, 그 구성 기기인 SOC, EOC, 전장박스에 대한 최종 우주환경시험을 수행하였다. 과학기술위성 3호의 비행모델 우주환경시험은 진동시험과 열진공시험으로 이뤄지며, 그 시험 규격은 문서에 규정된 Acceptance Level로 수행된다. 충격시험은 공학인증모델을 통해 검증되었다. 열진공시험은 한국천문연구원에서 수행되었으며, 진동시험은 한국과학기술원 인공위성센터에서 수행되었다. 또한 전체 위성이 조립된 후 과학기술위성 3호의 열진공시험은 한국항공우주연구원에서 수행되었다. 이 발표에서는 MIRIS 비행모델에 대한 환경시험과정 및 결과를 보고하고, 과학기술위성이 전체적으로 조립된 후의 MIRIS 진동 및 열진공 시험 결과도 함께 논의한다.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2002.11a
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• pp.346-347
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• 2002

악취는 인간의 생활환경에 불쾌감과 혐오감을 주는 감각공해로서 악취를 줄여 쾌적한 환경을 유지하고자하는 연구가 증가함에 따라 이에 관련된 탈취제품이 많이 상품화되고 있다. 그러나 탈취성능에 대한 체계적인 평가가 이루어지지 않아 탈취제품의 성능을 개관적으로 평가할 수 있는 시험분석법의 개발이 필요하다. 본 연구에서는 여러 악취물질 중 포름알데히드를 대상으로 탈취제품의 성능을 평가하기 위한 시험분석법을 개발하기 위하여 최적 측정조건을 확립하고자 하였다. (중략)

• The Bulletin of The Korean Astronomical Society
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• v.37 no.2
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• pp.136.2-136.2
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• 2012

저궤도지구관측 위성의 광학탑재체는 위성이 궤도에 진입한 이후 관측과 같은 주요 임무를 전담하는 중요 시스템이다. 광학탑재체가 장착된 위성이 발사체에 탑재되어 발사하는 순간부터 우주의 궤도에 진입하기까지 극심한 진동 환경에 노출된다. 이러한 상황을 예측하여 설계된 해당 시스템은 발사 이전에 진동 환경을 모사하는 시험을 통해 완벽하게 검증되어야 한다. 본 논문에서는 저궤도지구관측위성용 광학탑재체에 대하여 실시한 진동 환경 시험 방법 및 분석 내용을 소개하고자한다.

• Journal of Environmental Health Sciences
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• v.15 no.1
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• pp.1-9
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• 1989

환경인자가 인체의 발암에 크게 기여하며, 대기오염도 흡연인자와 더불어 폐암발생의 주요인자로 주목되고 있다. 발암성 시험은 mouse, rat 등의 소동물을 이용하는 in vivo 시험법이 원칙이나, 시간과 경비가 많이 소요되므로, in vitro 생물시험법이 현재 발암물질의 screening 수법으로 많이 이용되고 있다. 특히 B.N.Ames에 의해 개발된 Salmonella균 변이주를 이용하는 방법은, 간편성, 신속성에 뛰어나고, 정성적 또는 정량적으로 발암성과 매우 높은 상관관계를 보이고 있어 최근 10여년간에 걸쳐, 수많은 화학물질 또는 대기오염물질과 같은 복합오염물질의 변이원성 및 발암성의 screening test로서 널리 응용되어 왔다.

• Aerospace Engineering and Technology
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• v.7 no.2
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• pp.76-81
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• 2008

The vibration test system of satellite environment test dept. has been used successfully for the vibration tests of a majority of korean space programs. To meet the recent needs of large size test facility available for the vibrational tests of the huge launch vehicles and satellites, KARI have developed the large size multi-electromagnetic shaking system with $3{\times}3m$ head expander system. The new system will consist of three electromagnetic shakers which has 160 kN thrust force individually, and be able to sustain up to 8 tons test load and 300 kNm overturing moment. This paper describes the design components in the development process of multi-excitation shaker system.

• Journal of the Korean Society for Marine Environment & Energy
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• v.13 no.4
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• pp.249-262
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• 2010

Regulatory test method for Total Petroleum Hydrocarbons (TPHs) in the marine sediment and biota has not still been established even though TPHs are one of the major pollutants in marine environment. Based on the Korean Soil Standard Method (SSM) for TPHs, we considered a new treatment method for determining TPHs in marine environmental samples by using a Gas chromatography coupled with Mass spectrometric detector. We suggested an improved recovery test for quality control procedures and introduced analytical procedures of removing sulfur, polar organic materials, water and saponification for removing neutral lipids in marine bottom sediments and biota.

• Korean Journal of Environmental Agriculture
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• v.22 no.4
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• pp.273-277
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• 2003

The aim of this study was to apply the new agricultural technique developed for three years($'96{\sim}'98$) by demonstration at an model farm of environmental agriculture located in Bangsan-ri, Dagang-myun, Namwon-city. Rice growth of environmental farming plot, which supplied with oil cake and compost fermented with chicken manure was reduced compared to that of conventional farming plot, which supplied with chemical fertilizers. Weed control by using of Ampullarius insularus in the rice paddy field was effective compared to that of control, which treated with chemical herbicide twice. The yield of rice was decreased of 35% in both environmental and eclectic farming polt compared to that of conventional farming plot. The water quality of environmental not and eclectic farming plot were good compared to conventional farming plot. Density of water flea was high in environmental and eclectic farming plot compared to that of the conventional farming plot.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.32 no.9
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• pp.103-113
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• 2004

The satellite is exposed to the severe vibration environments such as random vibration environments such as random vibration, acceleration, shock, and acoustics during launch ascent and transportation. It is also faced with various space environments such as thermal vacuum, radiation and microgravity during the mission life. The satellite should be designed, manufactured, assembled and tested to be able to endure in these harsh environments. This paper addresses the results of the structural and thermal design and analyses for the HAUSAT-1 picosatellite which is scheduled to launch in the first quarter of 2005 by Russian launch vehicle "Dnepr". The qualification vibration and thermal vacuum tests have been conducted and passed at the satellite level to ensure that the HAUSAT-1 mechanical system was designed to be stable with enough margin.

• Korean Journal of Veterinary Service
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• v.42 no.2
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• pp.85-92
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• 2019

The study was conducted to investigate the effect of propolis on the increase of the immunity of honeybee bees by gradually administering the bees' propolis to bees. 0.16% and 0.3% 0.6% Propolis were administered at intervals of 2 weeks for 2 months, respectively, and 16 kinds of representative diseases of bees were tested. As a result, less bee disease was observed directly in the 0.3% propolis-administered group. In the next year, bees and a newborn bee showed a decrease in the incidence of bee disease and American foulbrood in bees administered with propolis. Based on the results of these studies, it was confirmed that propolis administration in bees helps to enhance immunity of bees and is effective in controlling American foulbrood.

• Analytical Science and Technology
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• v.22 no.5
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• pp.369-375
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• 2009

We evaluated the homogeneity and accuracy of low level airborne fibrous standard, and accomplished the proper proficiency test. We had found that the correlation of concentration of standard solution and asbestos density was 0.9863~0.9968, and concluded that the proper guideline of the analysis result was ${\mid}Z{\mid}{\leq}2$ interval of Z-score.