• 대한기계학회논문집B
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• 제35권6호
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• pp.625-632
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• 2011

[ $CH_4$ ]고온공기 대향류 확산화염의 점화특성을 화염제어 연속계산법을 이용하여 수치해석적으로 검토하였다. 화학반응의 계산에는 GRI-v1.2 반응기구를 이용하였으며, 화염 최고온도를 총괄 스트레인율의 역수에 대해 나타내어 점화 및 소화특성에 관한 화염 최고온도의 S-곡선을 얻을 수 있었다. 총괄 스트레인율 변화에 따른 화염구조를 고찰하기 위해 S-곡선에서 Upper Branch와 Middle Branch의 화염 온도 분포와 속도구배를 비교하였다. 총괄 스트레인율값은 화염면과 혼합층의 연료과 공기측 경계에서 정의되는 국소 스트레인율값과도 비교하였다. 연료측과 공기측의 국소 스트레인율은 총괄 스트레인율과의 좋은 상관관계에 있음을 알 수 있었다. 화염제어 연속계산법이 확산화염의 점화, 소화특성을 검토하는 데 매우 유용한 방법임을 확인하였다.

• 천문학회보
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• 제35권2호
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• pp.83.1-83.1
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• 2010

Recent observations of Sloan Digital Sky Survey (SDSS) for the ugriz filters have provided the largest and the most homogeneous photometric database. Especially, the ugriz systems have been used in many telescopes, such as SDSS, CFHT, and Gemini, and will be applied next generation large telescopes. In addition, many stellar evolution models, like as PADOVA, BaSTI and DSEP, have introduced theoretical isochrones in ugriz system, to apply the isochrones into the photometry of stars in globular clusters. In this study, we transformed Yonsei-Yale($Y^2$) isochrones to ugriz photometric system and fit the isochrones to the (g-r, r), (g-i, r), and (r-i, r) CMDs of 13 globular clusters (Chun et al. 2009, Clem et al. 2008, An et al. 2008). We found that the derived ages from $Y^2$-isochrones are 1~3Gyr younger and the estimated distance moduli are 0.3mag larger than the values inferred from the other isochrones in r-band. Also, the E(B-V) are 0.02~0.04mag less than those estimated from the other models. The ages of each globular cluster estimated from $Y^2$-isochrones are 12~14Gyr and distance moduli show good agreement with previous studies. From this result, we confirmed the availability of the $Y^2$-isochrones in gri filters. However, it is a problem which will improve that E(B-V) values obtained from $Y^2$-isochrones are too small. Finally, the result of this study is expected to be used research of globular cluster in ugirz photometric system.

• 수산해양기술연구
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• 제21권2호
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• pp.123-130
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• 1985

Loran-C 위치의 정도를 높이기 위하여 제주지역을 대상으로 북동태평양 Chain (GRI 5970)에 대한 시간차를 관측하여 그 전파경로와 측지계 및 전파속도에 따른 시간차오차 등을 분석 검토한 결과는 다음과 같다. 1. Loran-C 전파는 M-X 조국, M-Y조국 모두 주국, X, Y 종국과 관측점 사이에 높이 500m 이상 되는 한라산을 통과하여 전파될 때 시간차 오차가 커짐을 알 수 있었다. 2. 측지계 및 전파속도의 보정에 따른 시간차오차는 M-X 조국에서는 측지계변환과 속도보정을 행할수록 적어지고, M-Y조국에서는 M-X조국과는 달리 해상 및 육상의 전파경로에 따라 시간차오차가 불규칙적으로 변함을 알 수 있었다. 3. 보정요소별 측위의 정도는 측지계를 변화하고 속도보정을 행한 것이 가장 높고, WGS-72 측지계를 변환시키지 않은 것이 가장 낮았다. 4. 측정위치의 정도를 향상시키기 위해서는 굴절율에 의한 속도보정과 측지계변환 및 육상전파속도보정을 행하여야 함을 알 수 있었다.

• STI Policy Review
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• 제3권2호
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• pp.152-171
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• 2012

In April 2001, many Japanese national institutes were reorganized as Independent Administrative Institutions (IAI) based on the General Act for Independent Administrative Institutions and the act for each institution. Under the Ministry of Education, Culture, Sports, Science and Technology (MEXT), the National Institute for Materials Science (NIMS) was established by the merger of the National Research Institute for Metals (NRIM) and the National Institute for Research in Inorganic Materials (NIRIM). One of the biggest changes was the expansion of autonomous administration. The nanotechnology and material R&D field was prioritized in the 2nd (2001-2005) and the 3rd (2006-2010) Science and Technology Basic Plans; subsequently, NIMS was assigned to take the initiative in nanotechnology as well as materials science. NIMS has proactively expanded research fields through the introduction of researchers from polymers, electronics, and biotechnology as well as member institutes of the World Materials Research Institute Forum (WMRIF). Globalization has been promoted through programs that include the International Center for Young Scientists (ICYS) and the International Center for Materials Nanoarchitectonics (MANA). The 4th Science and Technology Basic Plan (2011-2015) emphasizes outcomes-recovery and rebirth from the disaster, green innovation, and life innovation. The Midterm Plan for NIMS also follows it. R&D collaboration by multi-partners (that include industry, university, and GRI) should be strategically promoted where GRI are especially required to play a hub function for innovative R&D and open innovation. NIMS highlights are Tsukuba Innovation Arena (TIA) and the Nanotechnology Platform Project. On January 20, 2012, a new organization was decided on by the Japanese Government where several IAI from different science and technology areas will be merged to realize more effective R&D as well as administrative cost reductions. NIMS is also supposed to be merged with 4 other R&D IAI under MEXT by the end of 2013.

• 기술혁신학회지
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• 제22권1호
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• pp.1-27
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• 2019

이 연구는 '사회적 도전과제 대응과 지속가능한 발전을 지향하는 출연(연)으로의 전환'의 관점에서 출연(연)의 변화를 논의한다. 이를 위해 출연(연)에서 이루어지는 사회문제 해결형 연구개발을 전환실험으로 파악하여 그것의 진행과정을 살펴본다. 포커스 그룹 인터뷰 방식을 활용해서 시스템 전환의 틀에서 출연(연)의 사회문제 해결형 연구개발에 대한 인식, 연구개발의 진행과정, 그 문제점과 대응방향을 검토했다. 인터뷰 결과를 요약하면, 현재 전환의 필요성이 논의되고 전환실험이 소규모로 진행되고 있지만 아직 기존 틀에서 실험들이 진행되고 있다. 전환을 촉진하기 위해서는 출연(연) 내부로부터 진행되는 전환실험과 비전 형성작업이 필요하다.

• 한국작물학회지
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• 제36권1호
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• pp.65-69
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• 1991

과맥에서 종자활력의 저하요인을 구명하고자 과맥 2계통(피, 과 isogenic line포함) 및 피맥 1품종의 종자의 수발아를 유도하여 손과 기계탈곡(700 rpm ) 한 종자를 이용하였다. 1. 수발아된 종자를 손 탈곡하여 배부분의 손상이 없어서 발아세, 발아율, TTC치은 수발아 정도에 따른 차이가 적었으나, 출아력은 수발아가 클수록 감소되었다. 2. 수발아된 종자는 기계탈곡시 배의 부분적인 손상이 관찰되었으며, 손 탈곡에 비해서 종자활력에 관계된 형질들이 고도로 유의적인 감소를 가져왔고 효소활력은 크게 증가되었다. 3 손 탈곡구에서 수발아 정도는 효소활력 ( r =0.9 31＊＊, 0.951＊＊) 및 발아력 ( r=0.46＊)과 정상관이 있었다.

• 한국자동차공학회논문집
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• 제13권3호
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• pp.74-79
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• 2005

The Homogeneous Charge Compression Ignition(HCCI) combustion is currently under intensive investigation because of its potential to increase thermal efficiency while greatly decreasing NOx and p.M. In order to account for the thermal boundary layer effects, the two-zone model has been developed to analyze the combustion characteristics of HCCI engine. The detailed chemistry are represented by the GRI mechanism 3.0 involving 53 species and 325reactions. The present combustion model has been validated against the experimental results. Computations are also made for the wide-range operating conditions of HCCI engine.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2014년도 제49회 KOSCO SYMPOSIUM 초록집
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• pp.91-94
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• 2014

In this study, the laminar burning velocities of SNG fuel were studied using both experimental measurements and kinetic simulations. They were measured using the angle method of Bunsen flame configuration and the annular diverging channel combustor. And they were also numerically calculated by CHEMKIN Package with GRI 3.0 mechanisms. Spectrometer was used for characteristics of flame chemiluminescence of SNG fuels. From results of this work, first, we found that according to adding $H_2$ contents in the fuels the laminar burning velocities of SNG fuels were increased. And second, we also discovered existence of OH*, CH*, $C_2*$, HCO*, $CH_2*$ radicals and their correlation.

• 기술혁신학회지
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• 제1권2호
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• pp.165-180
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• 1998

This study suggests a new concept for the improvement of productivity and innovativeness of governmental research institutes(GRIs) : GRIs can also accomodate a special graduate course. Through the combination of educational function and research activities, the explict and tacit knowledge made by GRIs could be efficiently diffused to other sectors of national innovation system, especially industries. This study suggests three different models of graduate courses : independent course in each GRI, joint course by several GRIs, and joint course linking GRIs and university.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2000년도 제20회 KOSCO SYMPOSIUM 논문집
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• pp.35-44
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• 2000

It was numerically studied that NOx emission characteristics of confined $CH_{4}$ jet flames with the variation of the diameter of inner fuel nozzle, the flow rate of $CH_{4}$ and equivalence ratio. Parabolic type equations were adopted in the calculation and GRI-2.1I mechanism was used for the chemical reaction. NOx emission index (EINOx) was introduced to evaluate NOx emission quantitatively in parametrically varied flames and the contribution of Thermal and Prompt NO mechanism was discussed. The results showed that Total EINOx varied sensitively with the variation of the flow rate of$CH_{4}$ but it was not sensitive to the variation of the diameter of inner fuel nozzle. Thermal EINOx showed the similar tendency to total EINOx and Prompt EINOx showed insensitivity to the variation of the diameter of inner fuel nozzle and the flow rate of $CH_{4}$.