• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2011년도 추계학술대회 초록집
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• pp.56.1-56.1
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• 2011

The solar and meteorological resources map is calculated using by one-layer solar radiation model (GWNU model), satellites data and numerical model output on the Korean peninsula. The Meteorological input data to perform the GWNU model are retrieved aerosol optical thickness from MODIS (TERA/AQUA), total ozone amount from OMI (AURA), cloud fraction from geostationary satellites (MTSAT-1R) and temperature, pressure and total precipitable water from output of RDAPS (Regional Data Assimilation and Prediction System) and KLAPS (Korea Local Analysis and Prediction System) model operated by KMA (Korea Meteorological Administration). The model is carried out every hour using by the meteorological data (total ozone amount, aerosol optical thickness, temperature, pressure and cloud amount) and the basic data (surface albedo and DEM). And the result is analyzed the distribution in time and space and validated with 22 meteorological solar observations. The solar resources map is used to the solar energy-related industries and assessment of the potential resources for solar plant. The National Institute of Meteorological Research in KMA released $4km{\times}4km$ solar map in 2008 and updated solar map with $1km{\times}1km$ resolution and topological effect in 2010. The meteorological resources map homepage (http://www.greenmap.go.kr) is provided the various information and result for the meteorological-solar resources map.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.2902-2909
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• 2011

Regional torrential rains in summer this year due to abnormal climate changes compared to last year, have been frequent. Since Typhoon Rusa and Typhoon Maemi resulted in major damage to railroad facilities in 2002 and 2003 consecutively, problems with abnormal climate changes became a global problem including railroad and floods and droughts around the globe, heavy snow and winter warming have been repeated until now. Serious problem of radiation leakage in Fukushima nuclear power plant by the Tsunami due to 9.0-scale earthquake, this year in March, in northeastern Japan happened, and has given an impact on the life of Japanese citizens and industries and has also influenced on Korean. This shows how important to secure and to protect major national facilities including railroad structures to natural disasters such as earthquake. Therefore, we will briefly discuss about technologies for securing and protecting railroad structures to earthquakes, floods and other natural disasters.

• 한국염색가공학회지
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• 제20권3호
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• pp.39-56
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• 2008

A wide variety of materials including aldehydes, cationic agents, alcohols, peroxygens, phenols and chlorinated phenols, metal ions are being employed as biocides. Among three levels for biocidal functions (sanitization, disinfection and sterilization), disinfection is an enough level for antimicrobial textiles. In terms of antimicrobial agents for textile applications, quaternary ammonium salts (QAS), chitosan, metal and metal salts, N-halamine based materials are developed with numerous research and the positive ions of those materials may result in disinfection of microorganisms. Photocatalysts, especially titanium dioxide (titania) produces the hydroxyl radical (${\cdot}\;OH$) which causes inactivation of microorganisms after UV radiation, have been used for antimicrobial applications.

• 비파괴검사학회지
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• 제14권4호
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• pp.244-249
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• 1995

적외선을 이용한 비파괴검사 방법은 검사자가 검사체의 온도를 분석하여 검사체의 건전성을 평가할 수 있도록 개발된 방법이다. 이것이 최근에는 화력발전소 및 원자력발전소 등과 같은 다양한 산업에 적용되어 사용되고 있다. 따라서, 본 보고서는 적외선을 이용한 비파괴검사의 기초적인 원리, 적외선 측정 장비의 기본 원리 및 그것의 응용분야를 기술하였다.

• 한국분무공학회지
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• 제20권4호
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• pp.230-235
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• 2015

The demands for reliable particle cloud temperature measurement exist in many process industries and scientific researches. Particle cloud temperature measurements depend on radiation thermometry at two or more color bands. In this study, we developed a sensitive, fast response and compact online infrared two-color probe to measure the temperature of a particle cloud in a phase of two field flow (solid-gas). The probe employs a detector contained two InGaAs photodiodes with different spectral responses in the same optical path, which allowed a compact probe design. The probe was designed to suit temperature measurements in harsh environments with the advantage of durability. The developed two-color probe is capable of detecting particle cloud temperature as low as $300^{\circ}C$, under dynamic conditions.

• Journal of the Optical Society of Korea
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• 제13권1호
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• pp.2-7
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• 2009

This paper reviews evolution of the research networks on intense laser science under international and Asian frameworks during 2000 to 2008. The OECD Global Science Forum Steering Committee on Compact, High-Intensity Short-Pulse Lasers led to the establishment of the International Union of Pure and Applied Physics (IUPAP) Working Group: International Committee on Ultrahigh Intensity Lasers (ICUIL) and the Asian Intense Laser Network (AILN) in 2004. Through various activities under AILN such as the Asian Symposium on Intense Laser Science (ASILS), the Asian Summer School on Laser Plasma Acceleration and Radiation, and the High-Order Harmonics Workshops, closer relations are being formed among the scientists and also among the young generations working in intense laser science in the Asian regions.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2001년도 추계학술대회논문집 II
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• pp.579-585
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• 2001

This paper proposed a method of reducing a noise in hard disk drive. This method is performed through three parts of procedures. First procedure is sound-oriented experiment, which contains sound intensity techniques and measurements of sound pressure level and sound power. Second is vibration-oriented experiment, which contains FRF(Frequency Response Function) analysis and disk vibration reduction techniques. And the third is computer-oriented simulation, which contains modal analysis and force vibration analysis using ANSYS and sound radiation prediction using SYSNOISE. As these three parts can affect with each other, they should be considered and conducted simultaneously. Through this procedure sound power is measured 2.7 Bels in idle-spinning mode, which is the lowest noise level in the HDD industries.

• 한국표면공학회지
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• 제14권4호
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• pp.221-233
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• 1981

Section 102(2) (c) of the National Environmental Policy Act of 1969 of the United States requires an environmental assessment of the major federal actions that could significantly a-ffect environmental quality. The review is known as the NEPA assessment process, and the resulting document is called an Environmental Impact Assessment (EIS). Article 5 of the En-vironmental Preservation Law of ROK also introduced this system to a cereain extent. The purpose of this paper is, therefore, to review the general impacts of environmental pollution caused by newly proposed actions on air quality, water resources, and land use as well as specific impacts from the disposal of radiation wastes, operation of petroleum and ru-bber industries, construction of highways and dams, location of power plants and industrial co-mplexes, etc., in order to fully understand the importance of this system. Differences between American and Korean system are also briefly studied and reached to a conclusion that this important system should be understood in such a way as to link and uti-lize all conceivable disciplines and human knowledge in order to protect our environment by all means for ourselves and our coming generations as well.

• 폴리머
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• 제36권3호
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• pp.344-350
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• 2012

전자선 조사 방법을 이용하여 편광필름용 아크릴계 고분자를 가교화시킨 후 이의 점착 특성을 평가하였다. 아크릴 공중합체는 $n$-butylacrylate(BA), 2-hydroxyethyl methacrylate(HEMA), acrylic acid(AA)를 기본 단량체로 하여 다양한 조성으로 중합하였다. 아크릴 공중합체를 25 ${\mu}m$ 두께로 PET 이형필름에 코팅한 후 편광필름에 합지하고 그 위에 전자선을 조사하여 아크릴 공중합체의 가교화 반응을 진행하였다. 모든 아크릴 공중합체는 조사선량 50 kGy에서 93% 이상의 높은 젤분율을 보였으며, 아크릴 공중합체에 도입된 HEMA 단위가 많을수록 높은 가교밀도를 보였다. BA/HEMA/AA(89.5/10/0.5 w/w/w)의 단량체 공급비로 중합된 아크릴 공중합체에 50 kGy로 전자선을 조사하여 얻어진 아크릴 점착제가 가장 우수한 박리력, 내크리프성, 내구신뢰성, 내열빛샘 특성을 보였다. 전자선 조사를 이용한 편광필름용 아크릴계 점착제의 제조 방법을 적용하면 액정 표시장치용 편광필름의 생산성 및 작업성을 크게 개선할 것으로 기대된다.

• 한국식품과학회지
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• 제38권5호
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• pp.684-690
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• 2006

본 연구에서는 비파의 산업적 이용 평가를 목적으로 하여 부위별 비파 추출물의 생리활성 및 감마선 조사효과를 평가하였다. 비파 추출물의 감마선 조사에 의한 색도변화에서 명도 및 적색도는 증가하였고 황색도는 감소하여 더 밝은 색을 띄었다. 총 페놀 함량은 비파 잎에서 94.1 mg/g으로 가장 높았으며, 다음으로 씨, 과육 순으로 나타났으며 조사후의 유의적인 변화는 없었다. 항산화 효과로서는 electron donation ability, ${\beta}-carotene$ blcaching assay, FRAP assay 및 reducing power을 정하였는데 이와 같은 항산화 관련 실험에서 비파 부위별 메탄올 추출물 중 잎이 씨와 과육보다 상대적으로 강한 활성을 보였으며 감마선조사에 의한 유의적인 변화는 관찰되지 않았다(p<0.05). 본 실험에서의 결과로서 비파에서는 총 페놀 함량이 높을수록 항산화 활성 비례 증가함을 시사하는 자료가 얻어졌다. Xanthine oxidase 저해활성 측정결과, 비파 잎이 39.6%, 씨가 35.4%로 유의적 차이는 없었으나 과육은 20.2%로 차이를 나타냈다. 또한, 조사에 의한 유의적 차이는 없었다. 부위별 비파 추출물의 항간효과를 paper disc법을 이용하여 측정한 결과, 잎 추출물이 가장 강한 항균 활성을 가지는 10에서 14mm의 저해환을 나타내었으며, 특히 대장균에 대해서는 감마선 조사에 의한 유의적 변화 없이 가장 강한 항균 활성 나타냈었다. Ames test를 이용한 복귀돌연변이 시험에서는 $10,000\;{\mu}g/plate$이하 일 때 부위별 비파 메탄올 추출물의 돌연변이원성이 나타나지 않는 것으로 확인되었다. 이상의 결과로부터 다량의 페놀성 화합물을 함유하고 있는 비파의 생활 습관성병 예방 및 기능성 천연 소재로서의 개발이 기대되며 감마선 조사에 의한 비파 성분의 화학적 변형에 관한 고찰이 필요하다고 사료된다.