• 제목/요약/키워드: WISE

검색결과 1,706건 처리시간 0.027초

TIGHTNESS OF LEVEL-WISE CONTINUOUS FUZZY RANDOM VARIABLES

  • Joo, Sang-Yeol;Lee, Seung-Soo;Yoo, Young-Ho
    • Journal of the Korean Statistical Society
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    • 제32권1호
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    • pp.73-83
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    • 2003
  • In this paper, we first obtain some characterizations of compact subsets of the space of level-wise continuous fuzzy numbers in R by the modulus of continuity. Using this, we establish the tightness for a sequence of level-wise continuous fuzzy random variables.

A Memory-Efficient Block-wise MAP Decoder Architecture

  • Kim, Sik;Hwang, Sun-Young;Kang, Moon-Jun
    • ETRI Journal
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    • 제26권6호
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    • pp.615-621
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    • 2004
  • Next generation mobile communication system, such as IMT-2000, adopts Turbo codes due to their powerful error correction capability. This paper presents a block-wise maximum a posteriori (MAP) Turbo decoding structure with a low memory requirement. During this research, it has been observed that the training size and block size determine the amount of required memory and bit-error rate (BER) performance of the block-wise MAP decoder, and that comparable BER performance can be obtained with much shorter blocks when the training size is sufficient. Based on this observation, a new decoding structure is proposed and presented in this paper. The proposed block-wise decoder employs a decoding scheme for reducing the memory requirement by setting the training size to be N times the block size. The memory requirement for storing the branch and state metrics can be reduced 30% to 45%, and synthesis results show that the overall memory area can be reduced by 5.27% to 7.29%, when compared to previous MAP decoders. The decoder throughput can be maintained in the proposed scheme without degrading the BER performance.

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SEARCHING FOR ULIRGS BY USING AKARI AND WISE

  • Koyama, Shuhei;Matsuhara, Hideo
    • 천문학논총
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    • 제32권1호
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    • pp.309-311
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    • 2017
  • Properties of ULIRGs (Ultra Luminous InfraRed Galaxies) are important to understand the cosmic star formation history. To investigate their properties up to z=0.3, we search for ULIRGs identified by using the AKARI/FIS Bright Source Catalogue and the WISE All-Sky catalog. By matching the AKARI $90{\mu}m$ catalogue with the WISE catalog, we selected 3,452 galaxies. Additionally, combined with the SDSS DR10 spectroscopic data, we selected 952 galaxies with spec-z. We then computed total infrared luminosities using SED fitting technique, and identified 31 ULIRGs, 561 LIRGs and 344 IRGs. For these galaxies, we found an indication that ULIRGs selected by AKARI change the SED shape with redshift (z = 0.1 - 0.3).

Finding Hidden Star Clusters Using the WISE

  • 류진혁;이재형;이명균
    • 천문학회보
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    • 제37권1호
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    • pp.57.2-57.2
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    • 2012
  • We present a survey for finding hidden star clusters using the WISE data. There are more than two thousand star clusters in the current catalogs of star clusters in the Milky Way Galaxy. However, there are still numerous star clusters remaining to be discovered, especially, along the Milky Way. The WISE, NIR to MIR all sky survey, is an efficient source to find star clusters obscured by dust along the Milky Way. Taking the advantage of the power of WISE, we survey a wide area at ${\mid}l{\mid}<30^{\circ}$ and ${\mid}b{\mid}<6^{\circ}$, toward to the central region of the Milky Way to find new star clusters. To find cluster candidates, we used two kinds of method: the visual inspection and the brightness density investigation. We will report the progress of this survey.

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'슬기로운 생활'에 수록된 물리 영역 과학 용어 분석 (Analyzing the Science Words of Physics in 'Wise Life' Textbooks)

  • 윤은정;박윤배
    • 한국초등과학교육학회지:초등과학교육
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    • 제32권2호
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    • pp.127-138
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    • 2013
  • The purpose of this study was to select the basic words of physics for science education which were learned through everyday life or school education and be foundation of learning science. For this, we collected all words in the 'Wise Life' textbooks by 7th and 2007 National Curriculum, and extract the science words. As a result, there were 8,970 words in 8 textbooks of 'Wise Life', and about 18% of them, 1,585 words, were science words. There were 266 kinds of science words and most of them were biology words. And the textbooks by 2007 National Curriculum had more science words than by 7th's. Finally we selected 24 basic words of science only in the physics area by comprehensively considering difficulty, need and frequency.

QM/MM-MD Simulation을 통한 수용액 상에서의 Formamide Hydrolysis Mechanism 연구

  • 백용수;최철호
    • EDISON SW 활용 경진대회 논문집
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    • 제3회(2014년)
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    • pp.141-155
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    • 2014
  • Peptide bond hydrolysis는 세포 내외의 생화학반응에 있어서 핵심이다. 하지만 amide Hydrolysis Mechanism은 아직 명확하게 규명되지 않았다. pH가 중성인 물에서의 비 촉매 가수분해가 발생하는 몇몇 실험적 증거가 있지만, 해당 반응 매커니즘은 4 가지(non-assisted concerted, non-assisted step-wise, assisted concerted, assisted step-wise)로 여전히 논란이 있다. 이번 연구에서는, Formamide의 가능한 Hydrolysis Mechanism을 자세히 연구해보고자 한다. 먼저, Ab-initio 계산을 통해 4가지 반응 메커니즘의 다시 한번 확인하고, quantum chemical calculations과 quantum mechanical molecular dynamic이 결합된 (QMMD) simulation을 통하여 water solvent에서의 반응 메커니즘의 에너지관계를 규명하였다. 결론적으로 아직 계산이 끝나지 않은 supported concerted mechanism을 제외한 모든 계산에서 non-supported, supported 두 system 모두에서 step-wise가 일어나기 쉬웠고, non-supported 보다 supported mechanism이 선호됨을 보였다. Intermediate인 amino-gem-diol의 수용액 상에서 안정화 또한 나타났다. 이는 Ab-initio 계산만 통해서는 정확하게 산출할 수 없는 엔트로피의 영향을 잘 보여준다.

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Grid workflow system을 이용한 인공 심장 Parallel pipelined volume render ing system (Parallel Pipelined volume rendering of artifical heart using WISE on Grid)

  • 박진성;류소현;권용원;정창성
    • 한국정보과학회:학술대회논문집
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    • 한국정보과학회 2004년도 봄 학술발표논문집 Vol.31 No.1 (A)
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    • pp.67-69
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    • 2004
  • 본 논문은 Grid상의 workflow 시스템인 Workflow based Grid Portal for PSE(이하 WISE)를 이용한 인공 심장의 3차원 병렬 volume rendering system 디자인과 구현에 대하여 기술한다. Grid는 전 세계에 분산되어 있는 고성능, 대용량 자원들을 고속 네트워크로 연동하여 사용할 수 있게 하는 환경이며, WISE 시스템은 workflow 개념을 도입하여, 이런 자원들의 효율적이고 편리하게 관리해주고 아울러 여러 가지 패턴을 이용해 프로그래밍 할 수 있게 해주는 middleware이다. 본 논문에서는 Grid 상에서 WISE system에서 제공하는 프로그래밍 패턴을 이용하여 구조화되어 있지 않은 인공심장 데이터를 병렬 processing Pipeline 모델을 바탕으로 효율적인 parallel 3차원 가시화를 하기 위한 parallel pipelined volume rendering system을 구현하였다.

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배전계통 보호시스템의 보호능력의 평가방법 (A Protective Effectiveness Measure for Distribution Systems)

  • 현승호;이승재;임성일;최인선;신재항;최면송
    • 대한전기학회논문지:전력기술부문A
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    • 제53권5호
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    • pp.249-256
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    • 2004
  • This paper suggests a novel evaluation scheme of protective effectiveness in distribution systems. The adequacy of every parameter in a protective device is evaluated for the setting or correction rules. Then, the protective effectiveness of a device, device-wise effectiveness, is obtained by the combination of the parametric evaluation results. The coordination-wise effectiveness between devices can be calculated by evaluating the parameters which contribute the performance of coordination. The protective effectiveness of the whole system can be obtained by combining the device-wise and coordination-wise effectiveness values. The rules, in this paper, are categorized into three groups; rules for single parameter, rules for coordination between parameters, and rules for coordination between protective devices to form a hierarchical calculation model. The proposed method is applied to a typical distribution network to show its effectiveness.

근접장 이진 홀로그램의 다중화, 다층화 및 병렬 저장 (Multiplexed, Stack-Wise, and Parallel Recording of Near-Field Binary Holograms)

  • 김경염;강진구;이병호
    • 대한전기학회논문지:전기물성ㆍ응용부문C
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    • 제51권8호
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    • pp.382-389
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    • 2002
  • We present experimental results on the multiplexed and stack-wise recording of near-field holograms. Experiments on angular multiplexing show that the angular selectivity of near-field hologram is better than that of the conventional hologram. Experiments on stack-wise recording prove that near-fields originated from sub-diffraction-limit-size objects could be stored in a photorefractive crystal at 2mm apart from the crystal surface. In addition, to improve the data access and transfer time, a silicon nano-aperture array was introduced and applied to the recording of near-field holograms.

Triplet Class-Wise Difficulty-Based Loss for Long Tail Classification

  • Yaw Darkwah Jnr.;Dae-Ki Kang
    • International Journal of Internet, Broadcasting and Communication
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    • 제15권3호
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    • pp.66-72
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    • 2023
  • Little attention appears to have been paid to the relevance of learning a good representation function in solving long tail tasks. Therefore, we propose a new loss function to ensure a good representation is learnt while learning to classify. We call this loss function Triplet Class-Wise Difficulty-Based (TriCDB-CE) Loss. It is a combination of the Triplet Loss and Class-wise Difficulty-Based Cross-Entropy (CDB-CE) Loss. We prove its effectiveness empirically by performing experiments on three benchmark datasets. We find improvement in accuracy after comparing with some baseline methods. For instance, in the CIFAR-10-LT, 7 percentage points (pp) increase relative to the CDB-CE Loss was recorded. There is more room for improvement on Places-LT.