• 제목/요약/키워드: framing

검색결과 346건 처리시간 0.029초

A Noise-Reduced Risk Aversion Index

  • Park, Beum-Jo;Cho, Hong Chong
    • Journal of Information Technology Applications and Management
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    • 제25권1호
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    • pp.67-85
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    • 2018
  • We propose a noise reduced risk aversion index for measuring risk aversion through a laboratory experiment to overcome disadvantages of the multiple pricing list format developed by Holt and Laury (2002). We use randomized multiple list choices with coarser classification and reward weighting, supplement the rank of risk aversion with extra individual characteristics of risk attitude, and construct an index of risk aversion by standardizing the risk aversion ranking with quantile normalization. Our method reduces multiple switching problems that noisy decision makers mistakenly commit in experimental approaches, so that it is free of the framing effect which severely occurred in the HL. Furthermore, the index doesn't utilize any specific utility function or probability weighting, which allows researcher to hold the independence axiom. Since our noise reduced index of risk aversion has many good traits, it is widely used and applied to reveal fundamental characteristics of risk-related behaviors in economics and finance regardless of experimental environment.

DME 예혼합 자기착화 연소중의 디젤분무연소에 관한 연구 (The Investigation of Diesel Spray Combustion in DME HCCI Combustion)

  • 임옥택
    • 대한기계학회논문집B
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    • 제32권4호
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    • pp.241-248
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    • 2008
  • The purpose of the research is to investigate of diesel spray combustion for simultaneously reduction way of NOx and PM. The diesel injection were done into intermediates that are generated by very lean DME HCCI combustion using a RCM. The concentration of intermediate could not be directly measured, so we estimated it by CHEMKIN calculation. Two dimensional spontaneous luminescence images which are created by chemical species reaction at low temperature reaction (LTR) and high temperature reaction (HTR) are captured by using a framing streak camera. Also, combustion events were observed by high-speed direct photography. The ignition and combustion events were analyzed by pressure profiles and the KL values and flame temperatures were analyzed by the two-color method.

웨이블렛 변환을 이용한 디지털 오디오 무손실 압축기법 (A lossless Audio Coding method using wavelet transform)

  • 박세일;박세형;신재호
    • 한국음향학회:학술대회논문집
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    • 한국음향학회 2001년도 추계학술발표대회 논문집 제20권 2호
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    • pp.135-138
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    • 2001
  • 오늘날 오디오 포맷의 대부분은 마스킹 효과를 이용한 손실 압축 기법(lossy coding)이다. 그러나 고음질을 요구하는 매니아가 있고 DVD등 차세대 멀티미디어 포맷으로 무손실 오디오 압축기법이 요구되고 있고 이를 위해 일반적인 무손실 데이터 압축방법인 PkZip 등으로 압축할 경우 압축비가 약 1.07:1 밖에 되지 않으므로 적절하지 못하여, 디지털 오디오 데이터를 위한 무손실 압축 알고리즘의 연구가 필요하게 되었다. 본 논문에서는 플래이밍(Framing), 상호상관제거(intrachannel decorrelation), 엔트로피 코딩(Entropy coding) 의 세가지 단계로 구성되는 일반적인 오디오 무손실 압축 기법을 효율적으로 압축하기 위해 wavelet transform을 적용한 알고리즘은 제안한다.

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DOCSIS 망에서 채널 결합 기반 스케줄링 알고리즘 (A Study on Channel-Bonding Based Scheduling Algorithm for DOCSIS Networks)

  • 노선식
    • 한국정보통신학회:학술대회논문집
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    • 한국해양정보통신학회 2008년도 추계종합학술대회 B
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    • pp.77-80
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    • 2008
  • 본 논문에서는 채널 결합 기법을 고려하여 DOCSIS 3.0 망에서 상향스트림 스케줄러를 설계하고 스케줄링 알고리즘을 제안하였다. 본 논문에서 제안하는 스케줄러는 Bonding Process Module, QoS Service Classifier, Upstream Scheduler, Framing Module 등으로 구성된다. 결합 채널에 대한 대역을 할당하기 위해 균등요구대역 할당알고리즘, 현재 요구대역할당을 고려한 요구대역 할당알고리즘, 이전 MAP의 대역 할당 정보를 고려한 요구대역 할당알고리즘을 제안하였다. 제안한 스케줄러 및 스케줄링 알고리즘의 성능을 비교평가하기 위해 OPNET 기반의 DOCSIS 3.0 시뮬레이션 모델을 개발하고, 시뮬레이션을 수행하였다. 성능평가 결과 CM에서 큐잉 지연과 CMTS에서 데이터 수신량 관점에서 균등요구할당 알고리즘이 우수한 성능을 나타냄을 확인할 수 있었다.

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Managerial Involvement in Investment Decision: A Study of Hydropower Enterprises

  • Gautam, Dhruba Kumar;Dahal, Rewan Kumar
    • 아태비즈니스연구
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    • 제4권2호
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    • pp.11-20
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    • 2013
  • This study extends the extant scope of understanding investment decision, beyond the dominant 'technical' emphasis on the application of discounted cash flow techniques. The research methodology draws the positivist and interpretive research paradigms. It uses a deductive approach, survey strategy and principal component analysis for the analysis. Three key sets of factors emerged as important in the investment decision process in the hydropower sector. They are: group consensus (framing), influences on own judgment (heuristics), and application of knowledge & experience (intuition). The use of purposive and convenient sampling might have some unintended impact on the findings. Consequently, any generalizations of the findings to a wider population of organizations and managers need to be made with care. It is hoped that this paper will encourage other researchers to go beyond the analytic techniques of investment appraisal that have dominated investment decision research and seek to balance the emphasis by focusing on human involvement and behavioral aspects of investment decision.

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매체연기를 위한 영상언어 연구 (Visual Language for the Media Acting)

  • 고현욱
    • 한국콘텐츠학회논문지
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    • 제12권2호
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    • pp.154-162
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    • 2012
  • 촬영 시 프레이밍 되는 사이즈에 따라 배우의 표정과 몸짓 등이 소극적으로 혹은 과장되어 보이며 조명의 방향성, 광량 그리고 광질의 선택에 의해 배우 캐릭터의 변화가 이루어진다. 이와 같은 이유로 감독을 비롯한 매체영상을 담당하는 모든 이들은 카메라 앞의 배우들이 스크린에 어떻게 투영될지에 대해 많은 고민을 하게 된다. 본 논문은 이와 같은 영상매체의 기술적 설정 변화에 대응할 수 있는 방법과 배우의 캐릭터 및 내면연기를 강조하고 설명할 수 있는 카메라 및 조명의 역할 등 을 체계적으로 제시함으로써 영상언어의 시각적 요소들이 매체연기에 미치는 영향을 고찰 할 것이다.

Limiting the sway on multi-storey un-braced steel frames bending on weak axis with partial strength connections

  • Tahir, Mahmood Md.;Ngian, Poi Shek
    • Structural Engineering and Mechanics
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    • 제38권6호
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    • pp.825-847
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    • 2011
  • This paper investigates the design using wind-moment method for semi-rigid un-braced steel frames bending on weak axis. A limiting sway method has been proposed to reduce the frame sway. Allowance for steel section optimization between moment of inertia on minor axis column and major axis beam was used in conjunction with slope-deflection analysis to derive equations for optimum design in the proposed method. A series of un-braced steel frames comprised of two, four, and six bays ranging in height of two and four storey were studied on minor axis framing. The frames were designed for minimum gravity load in conjunction with maximum wind load and vice-versa. The accuracy of the design equation was found to be in good agreement with linear elastic computer analysis up to second order analysis. The study concluded that the adoption of wind-moment method and the proposed limiting sway method for semi-rigid steel frame bending on weak axis should be restricted to low-rise frames not more than four storey.

The Elevator, the Iron Skeleton Frame, and the Early Skyscrapers: Part 2

  • Larson, Gerald R.
    • 국제초고층학회논문집
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    • 제9권1호
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    • pp.17-41
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    • 2020
  • In Part One, I documented the evolution of the use of the elevator and the iron frame to build ever-taller buildings that would eventually be called "skyscrapers," to offset the ever-increasing cost of Manhattan real estate. By the start of the Great Depression of the 1870s in 1873, New York architects had erected two ten-storied skyscrapers. In Part Two I document the major events, designers, and buildings in New York, Chicago, and other American cities that eventually culminated in the ability to erect 20 story skyscrapers by 1890.

SRM에서 NACK 폭주 억제를 위한 타이머 설정 (Timer Establishment to Suppress NACK Implosion in SRM)

  • 이연수;김태환;김태훈;박혜련;이기현
    • 한국정보처리학회:학술대회논문집
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    • 한국정보처리학회 2002년도 추계학술발표논문집 (중)
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    • pp.1659-1662
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    • 2002
  • SRM[1][2]은 ALF(application level framing)과 LWS(light-weight session)을 위한 신뢰성 있는 멀티캐스트 구조로써 송신자가 아닌 수신자들이 오류가 발생하였는지를 검사하고, 오류가 발생했을 때, NACK 메시지를 전송하여 패킷 손실 복구를 요청한다. 그러나 다수의 수신자들이 송신자에게 패킷의 손실 복구를 요청하게 되면 NACK 폭주(NACK implosion)가 발생한다. 이 논문에서는 NACK 과부하 문제는 해결하기 위해서 수신자가 송신자에서 자신까지의 거리와 request 타이머 인자 값에 의해서 정해지는 구간에서 선택된 임의의 시간동안 기다리는 request 타이머를 개선하여 노드마다 카운터를 주어 안정적인 네트워크에서의 흐름일 경우는 그 구간을 짧게 하고, 반대로 불안정적인 네트워크 일 경우에는 구간을 길게 하여 가변적인 네트워크에 효율적으로 NACK를 억제하는 방법을 제시한다.

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Development of a simplified equivalent braced frame model for steel plate shear wall systems

  • Chatterjee, Arghya Kamal;Bhowmick, Anjan;Bagchi, Ashutosh
    • Steel and Composite Structures
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    • 제18권3호
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    • pp.711-737
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    • 2015
  • Steel Plate Shear Walls (SPSWs) have been accepted widely as an effective lateral load resisting system. For seismic performance evaluation of a multi-story building with SPSWs, detailed finite element models or a strip model can be used to represent the SPSW components. However, such models often require significant effort for tall or medium height buildings. In order to simplify the analysis process, discrete elements for the framing members can be used. This paper presents development of a simplified equivalent braced model to study the behavior of the SPSWs. The proposed model is expected to facilitate a simplification to the structural modeling of large buildings with SPSWs in order to evaluate the seismic performance using regular structural analysis tools. It is observed that the proposed model can capture the global behavior of the structures quite accurately and potentially aid in the performance-based seismic design of SPSW buildings.