• JSTS:Journal of Semiconductor Technology and Science
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• 제16권6호
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• pp.880-888
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• 2016

In this paper, we propose a new HDFS-AIO framework to enhance HDFS with Adaptive I/O System (ADIOS), which supports many different I/O methods and enables applications to select optimal I/O routines for a particular platform without source-code modification and re-compilation. First, we customize ADIOS into a chunk-based storage system so its API semantics can fit the requirement of HDFS easily; then, we utilize Java Native Interface (JNI) to bridge HDFS and the tailored ADIOS. We use different I/O patterns to compare HDFS-AIO and the original HDFS, and the experimental results show the design feasibility and benefits. We also examine the performance of HDFS-AIO using various I/O techniques. There have been many studies that use ADIOS, however our research is expected to help in expanding the function of HDFS.

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 1998년도 춘계학술발표회논문집(1)
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• pp.329-334
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• 1998

원자력발전소와 같이 복잡하고 안전성이 강조되는 경보처리 및 표시계통은 개발개념의 적합성 (설계요건의 타당성), 적용된 알고리즘의 완결성(지식기반과 소프트웨어의 확인)과 인간공학적 유용성의 평가가 상당히 중요하다. 동적 경보계통(Alarm and Diagnosis-Integrated Operator Support System : ADIOS)은 다음과 같은 실험을 통해 경보처리 알고리즘의 완결성과 인간공학적 유용성을 확인하였다.·예비기능시험(Preliminary functional test)·Petri net 을 이용한 알고리즘의 완결성 확인(Verification)·전규모 시뮬레이션 환경에서의 인간공학적 성능평가(Validation and Evaluation)

• Biotechnology and Bioprocess Engineering:BBE
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• 제8권1호
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• pp.1-8
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• 2003

With current developments in enzyme-catalyzed reactions and techniques available for rational redesign of natural biocatalysts, the enzymatic biosynthesis can become one of the most valuable Synthetic methods. Enzymatic regioselective catalysis in organic media has played a key role in pursuing asymmetric synthesis for active chiral compounds. Here, we shortly do-scribe some historical issues of the rapidly growing area, enzymatic catalysis in synthetic organic chemistry and then review researches that have been carried out in the regioselective enzymatic catalysis for the past two decades. An application of this technology to the modification of some potential target drug co m pound will be adios presented.

• 식물병연구
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• 제26권2호
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• pp.116-119
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• 2020

녹비작물을 이용한 선충 방제 기술 개발을 위해 클로버씨스트선충이 감염된 정선군 배추 포장에서 기름무 6품종과 백겨자 4품종의 녹비작물을 재배하였다. 2개월 후 트랙터 로터리를 이용하여 녹비작물을 토양에 환원시키고 1개월 동안 부숙시켰다. 이후 배추를 정식하고 70일이 경과한 다음 씨스트 선충에 대한 알 증식률과 배추의 생체중을 조사하였다. 그 결과, 기름무 Adios와 Anaconda 품종을 재배한 처리구의 토양에 존재하는 씨스트 내부의 알 밀도 감소율(Pf/Pi)은 각각 0.04, 0.02로 가장 낮았다. Adios와 Anaconda 처리구의 암컷의 증식수는 토양 300 ㎤당 각각 2.5마리, 3.5마리로 무처리를 비롯한 다른 처리구들보다 낮은 것으로 나타났다. 또한, 배추 3포기 생체중은 Adios와 Anaconda 처리구에서 각각 7.67 kg, 7.35 kg으로 나타나 무처리 5.64 kg보다 높았다. 본 연구결과에 따라 배추과 녹비작물인 기름무 Adios와 Anaconda 품종은 클로버씨스트선충의 친환경적인 방제 소재로 활용 가능하다고 판단된다.

• 한국해양환경ㆍ에너지학회지
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• 제15권3호
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• pp.238-246
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• 2012

해양으로 유출된 유류는 다양한 풍화과정을 통해 환경에서 제거되며, 증발이 유출사고 초기에 가장 우세한 풍화과정이다. 본 연구에서는 허베이스피리트호 사고유 중 이란산 원유를 대상으로 실험실에서 표준화된 증발실험을 실시하여 시간에 따른 물리화학적 변화를 관찰하였다. 증발과정에 영향을 미치는 유막두께, 풍속 등의 변수를 제어하여 48시간까지 노출한 결과 $29.3{\pm}0.4%$의 재현성 있는 결과를 산출하였다(n=40, p<0.001). 미국해양대기청의 풍화모델인 ADIOS2를 이용하여 환경조건에서 증발을 시뮬레이션한 결과 29%의 증발율을 구할 수 있었으며, 본 실험과 일치하는 결과를 확인하였다. 증발율에 따른 원유의 조성변화를 분석한 결과 저분자량의 알칸과 PAHs가 제거되었으나, 바이오마커 화합물은 증발에 의한 영향을 받지 않는 보전적인 특성을 나타냈다. 바이오마커 중 $17{\alpha}(H)$, $21{\beta}(H)$-hopane을 이용한 풍화율 계산값은 48시간 최종 값이 24.4%로 물리적인 증발에 따른 양적변화와 유사한 결과를 보였다. 호판을 이용한 풍화율 계산값 비교결과 사고 초기 현장 표착유(1단계 풍화 28.9%)와 메소코즘 풍화 실험 5일차(26.5%)까지는 풍화과정이 주로 증발에 의한 것으로 확인되었다.

• Journal of Astronomy and Space Sciences
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• 제18권1호
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• pp.1-6
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• 2001

In this paper we investigate the properties of advection-dominated accretion flows (ADAFs) in case that outflows carry away infalling matter with its angular momentum and energy. Positive Bernoulli number in ADAFs allow a fraction of the gas to be expelled in a form of outflows. The ADAFs are also unstable to convection. We present self-similar solutions for advection-dominated accretion flows in the presence of outflows from the accretion flows(ADIOS). The axisymmetric flow is treated in variables integrated over polar sections and the effects of outflows on the accretion flow are parameterized for possible configurations compatible with the one dimensional self-similar ADAF solution. We explicitly derive self-similar solutions of ADAFs in the presence of outflows and show that the strong outflows in the accretion flows result in a flatter density profile, which is similar to that of the convection-dominated accretion flows(CDAFs) in which convection transports the angular momentum inward and the energy outward. There two different versions of the ADAF model should show similar behaviors in X-ray spectrum to some extent. Even though the two models may show similar behaviors, they should be distinguishable due to different physical properties. We suggest that for a central object of which mass is known these two different accretion flow should have different X-ray flux value due to deficient matter in the wind model.

• Biomolecules & Therapeutics
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• 제6권4호
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• pp.351-357
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• 1998

In order to understand the mechanism of the regulation of CYPIAI gene expression and ethoxy-resorufin deethylase (EROD) activity in ex vivo system, we have studied the action of TCDD and 3MC in theisolated perfused male rat liver. CYPIAI myNA level and EROD activity were measured in rat liver that wasisolated and perfused with va.ious chemicals such as 2,3,7,8-tet.achlorodibenzo-p-dioxin (TCDD), 3-methyl-cholanthrene (3MC), $17{\beta}$-est.adios ($E_2$), morin. TCDD or 3MC alone perfusion into male rat liver resulted in increase of CYPIAI mRNA level and the magnitude of stimulation was one and half times higher with TCDD treatment than 3MC treatment. However $E_2$ perfusion into male rat liver showed slight stimulation of CYPIAI mRNA level. When $10_{-8}$ M $E_2$ was perfused concomitantly with either $10_{-9}$ M TCDD or $10_{-9}$ M 3MC, stimulated CYPIAI mRNA by either TCDD or 3MC was inhibited. Morin was examined for its effects on CYPIAI mRNA level and result was similar to that was observed with estrogen except that morin alone did not change the level of CYPIAI mRNA. EROD activity was also stimulated with either TCDD or 3MC perfusion, and the magnitude of EROD stiumlation was similar to that of CYPIAI mRNA stimulation in response to TCDD or 3MC perfusion. This data is different from the data that we have obtained with female rat liver. Concomitant perfusion either $E_2$ or morin with TCDD or 3MC inhibited 3MC perFusion or TCDD perfusion stimulated EROD activity. These data confirm the hypothesis that TCDD and 3MC might act through the same mechanism of action on the regulation of CYPIAI gene expression in male rat liver.