• 제목/요약/키워드: DAT

검색결과 429건 처리시간 0.026초

The Effect of Defect Sites on the Dissociation of NO on PT(111) Surface

  • 부진효;강용철;송명철;박종윤;곽현태;이순보
    • 한국진공학회지
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    • 제2권4호
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    • pp.404-409
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    • 1993
  • Adorption of nitric oxide on the Pt(III) surface sputtered by Ar-ion has been studied using thermal desorption spectroscopy and Auger electron spectroscopy. Ar-ion sputtering creates a precursor state of ($NO\beta$ stage) adsorbe dat defect sites. The precursor state is characterized by the terminal bent species . At low coverge mos 샐 adsorbed NO dissociates . And as increasing the coverage, the fraction of dissociation remains about 80%.

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복합다양체 솔리드 표현을 위한 경계정보의 분류 (Classificiation of Boundary Information for Non-manifold B-rep Solid Modeler)

  • 최국헌;한순홍
    • 한국CDE학회논문집
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    • 제4권2호
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    • pp.121-126
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    • 1999
  • Existing data structures for non-manifold solid modelers use basic dat entities, such as vertex, edge, loop, face, shell, and region to find adjacency relationships. But, no one clearly identified what additional types of data entitles are necessary to represent incidence relationships. In this paper, we classified the boundary information of vertex, edge, face , and region from the 3-D space view. As the results we can clearly define the boundary information required for adjacency relationships. The existing B-rep data structures for solid modeler are compared whether they have the required boundary information.

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VTR (VCR,DAT) 주행계 진동문제의 고찰 (Review on the Vibration Problems in VTR Transporting Mechanisms)

  • 김중배;박남수;이상조;박영필
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 1990년도 추계학술대회논문집; 한양대학교, 서울; 24 Nov. 1990
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    • pp.181-185
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    • 1990
  • In the present study, the following factors are analyzed systematically using the theoretical and experimental methods, which have the significant influence on the quality of VTR tape path system in order to develope the high performance and quality in VTR mechanism: 1) Vibration characteristics of the deck including the tape path sytem, 2) Modeling the global tape path, 3) Torsional vibration of the VTR drum. 4) Capstan system, 5) Tension bar, 6) Stick-slip phenomenon of the running tape.

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PROBE FEEDING SIMULATION USING OVERLAPPING-GRID TECHNIQUE FOR FDTD

  • Min, Kyeong-Sik;Vu, Manh-Dat
    • 한국마린엔지니어링학회:학술대회논문집
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    • 한국마린엔지니어링학회 2005년도 전기학술대회논문집
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    • pp.442-447
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    • 2005
  • This paper presents an application of overlapping-grid technique for probe feeding simulation. The overlapping grid technique is used to solve contour path problem. In this technique, field interpolation is very important to make communication between two coordinates. By applying overlapping-grid technique, error of contour path in probe feeding simulation is reduced.

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PC와 스마트폰 사이의 데이터 전송을 위한 클립보드 공유 (Sharing a clipboard between a personal computer and a smartphone for data transfer)

  • 여세환;김정선
    • 한국정보과학회:학술대회논문집
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    • 한국정보과학회 2011년도 한국컴퓨터종합학술대회논문집 Vol.38 No.1(D)
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    • pp.79-81
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    • 2011
  • 최신 스마트폰 사용자가 급격하게 늘어남에 따라 PC와 스마트폰을 동시에 사용하는 이용자도 많아지고 있다. 이러한 경우에 글이나 그림을 PC와 스마트폰 data를 주고 받아야 하는 상황이 자주 발생한다. 하지만 데이터를 전송하는 방법이 불편하고 오래 걸린다. 따라서 본 논문에서는 Pc와 스마트폰의 서로의 클립보드를 공유하는 애플리케이션을 설치하여 dat를 쉽고 빠르게 보내는 방법을 제안하고자 한다.

오디오 신호를 위한 표본화율 변환 알고리듬 성능 비교 (A Performance Comparison of Sampling Rate Conversion Algorithms for Audio Signal)

  • 이용희;김인철
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2002년도 하계종합학술대회 논문집(4)
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    • pp.187-190
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    • 2002
  • 본 논문에서는 지금까지 소개된 44.1KHz compact disc (CD)에서 48KHz digital audio tape (DAT)로의 표본화율 변환기법들에 대해서 가청 주파수 대역에서 100dB 이상의 dynamic range와 ±5x10­4dB 이하의 리플 크기를 유지할 수 있도록 각 기법들을 재설계하였으며, 메모리 요구량 및 계산량에 대해서 살펴보고자한다.

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Mixed-effects LS-SVR for longitudinal dat

  • Cho, Dae-Hyeon
    • Journal of the Korean Data and Information Science Society
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    • 제21권2호
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    • pp.363-369
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    • 2010
  • In this paper we propose a mixed-effects least squares support vector regression (LS-SVR) for longitudinal data. We add a random-effect term in the optimization function of LS-SVR to take random effects into LS-SVR for analyzing longitudinal data. We also present the model selection method that employs generalized cross validation function for choosing the hyper-parameters which affect the performance of the mixed-effects LS-SVR. A simulated example is provided to indicate the usefulness of mixed-effect method for analyzing longitudinal data.

Source-Sink Partitioning of Mineral Nutrients and Photo-assimilates in Tomato Plants Grown under Suboptimal Nutrition

  • Sung, Jwakyung;Lee, Suyeon;Lee, Yejin;Yun, Hongbae;Ha, Sangkeun;Ok, Yongsik
    • 한국토양비료학회지
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    • 제46권6호
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    • pp.652-658
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    • 2013
  • A huge number of greenhouse soils in Korea have accumulated mineral elements which induce many nutritional and pathological problems. The present study was performed to the effects of the reduced fertilization on plant growth, and uptake and partitioning of minerals (N, P, K) and soluble carbohydrates using highly minerals-accumulated farmer's greenhouse soil. On the basis of the recommended application for tomato crop, the application rates of N, P and K were 110(50%)-5.2(5%)-41.5(35%)kg $ha^{-1}$, respectively, using Hoagland's nutrient solution. Tomato growth rates during the whole experiment were not significant between treatments, but it was found that a decrease in daily growth represented after 60 days of treatment (DAT). The reduced application led to a drastic decrease in the concentration of N, P and K in fruits, and, thus, this resulted in lower uptake after 40 DAT. The lower phloem export and utilization of soluble carbohydrates caused an accumulation of extra-carbohydrates in leaves, stems and fruits in the reduced application. The reduced fertilization induced the capture of N, P and K in leaves and of soluble carbohydrates in stems compared to the conventional application. In this study, we suggest that it is possible to delay the first fertigation time in minerals-accumulated soils without an adverse impact on crop growth, but it is necessary to regularly monitor mineral status in soil to ensure a balanced uptake, synthesis and partitioning of minerals and carbohydrates.