• Title/Summary/Keyword: Buffering Analysis

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Dynamic behavior and impact analysis of high level impact system (고 충격 시스템의 충격력 및 동적 거동 해석)

  • 박춘식;박영필;양현석;김효준;최의중;이성배
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2001.11b
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    • pp.597-602
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    • 2001
  • The structure of the human body has a limit to absorb the high-level-impact that occurs in shoulder-fired system. In other to solve this problem, short recoil system is applied to shoulder-fired system, and is verified experimentally, and then is performed analysis of parameters sensitivity, optimization of main part. According to the results, we developed A fundamental basis for buffering structure modeling that is operated by high level input in shoulder-fired system

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Analysis of Installation Status and Application of GIS for Preliminary Risk Assessment of Underground Storage Tanks in Chuncheon City (춘천시의 지하 저장 탱크의 예비적 위해성 평가를 위한 설치 현황 분석 및 지리정보시스템의 적용)

  • Kim, Joon-Hyun;Han, Young-Han;Lee, Jong-Chun;Kwon, Young-Sung;Lee, Kwang-Yeon
    • Journal of Industrial Technology
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    • v.22 no.A
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    • pp.127-135
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    • 2002
  • In this study, the preliminary risk assessment for the underground storage tanks(UST) in Chunchon city was implemented using the geographical information system(GIS). The estimation variables, such as the installation year, storage capacity, the distances from streams, and from groundwater pumping wells, were selected to estimate the relative risk levels. The weighting factors were given to all the estimation variables. Cumulative scores were induced by the combination of all the scores of the corresponding variables using the buffering technique and the overlay analysis in ArcView. Using the these process, the relative risk level of each UST was estimated. Some sites in this study are simplified and reduced because the number of useable data are limited or too enormous. Thus the selection of the comprehensive estimation variables and the proper weighting values are required for the future study. The methodology in this study could be served not only for the preliminary risk assessment of UST but also for the selection of the proper location of new and old UST. And, it can be used for the effective management system of UST.

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Spatial Crime Analysis using GIS (GIS를 이용한 범죄의 공간적 특성)

  • Jeon, Jae-Han;Yang, Hyo-Jin;Kwon, Jay-Hyoun
    • Journal of Korean Society for Geospatial Information Science
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    • v.15 no.1 s.39
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    • pp.3-7
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    • 2007
  • To deal with the modern intellectual criminal acts, various efforts have been tried. Especially, it is not difficult to watch the recent activities to analyze the criminal characteristics spatially using computing and GIS technology. In this study, the spatial features and patterns of crime are investigated. Based on the real criminal record in Seoul Korea, the crime is reconstituted with four major categories such as assault, larceny, robbery, and rape. Then the variables are derived based on the theory of criminology. The kernal density analysis is performed to investigate the criminal distribution, and the correlation between the main criminal causes and the criminal outbreak is examined by buffering analysis. In addition, the land price and land usages are correlated with social-economic factors of criminal patterns to produce the final crime map.

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Analysis of Implementing Mobile Heterogeneous Computing for Image Sequence Processing

  • BAEK, Aram;LEE, Kangwoon;KIM, Jae-Gon;CHOI, Haechul
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.11 no.10
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    • pp.4948-4967
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    • 2017
  • On mobile devices, image sequences are widely used for multimedia applications such as computer vision, video enhancement, and augmented reality. However, the real-time processing of mobile devices is still a challenge because of constraints and demands for higher resolution images. Recently, heterogeneous computing methods that utilize both a central processing unit (CPU) and a graphics processing unit (GPU) have been researched to accelerate the image sequence processing. This paper deals with various optimizing techniques such as parallel processing by the CPU and GPU, distributed processing on the CPU, frame buffer object, and double buffering for parallel and/or distributed tasks. Using the optimizing techniques both individually and combined, several heterogeneous computing structures were implemented and their effectiveness were analyzed. The experimental results show that the heterogeneous computing facilitates executions up to 3.5 times faster than CPU-only processing.

A contention resolution scheme based on the buffer occupancy for th einput-buffer ATM switch (버퍼의 점유도에 기초한 입력버퍼 ATM 스위치의 경합제어 방식)

  • 백정훈;박제택
    • Journal of the Korean Institute of Telematics and Electronics S
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    • v.34S no.1
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    • pp.36-42
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    • 1997
  • This paper proposes a high-speed contention resolution scheme featuring high flexibility to the bursty traffic for an input buffering ATM switching architecture and its hardware strategy. The scheme is based on the threshold on the occupancy of the input buffer. As the proposed scheme utilizes the threshold, it has high flexibility to the fluctuations of the input traffic. The hardware strategy for the proposed policy is provided with the aim of the simple structure that achieves the reduction of the signal path and the power consumption. The performance on the average buffer size of the proposed policy is performed and compared with the conventional schame under the bursty traffic through both the analysis based on the markov hain and the simulation. The relations among the parameters on the proposed policy is analyzed to improve the performance.

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New Contention Resolution algorithm for Optical Burst Switch (광 버스트 스위치를 위한 새로운 충돌 해결 알고리즘)

  • Jeong Myoung Soon;Eom Jin seob
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.29 no.12A
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    • pp.1285-1290
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    • 2004
  • In this paper, a new algorithm for contention resolution in optical burst switched network is proposed and simulated. The proposed algorithm is made from the all mixing of wavelength conversion, deflection routing, segmentation, and optical fiber delay line buffering. We analysis the performance of the proposed contention resolution algorithm by using ns-2. The application of the algorithm into Korea backbone network shows the superior performance of a low burst loss probability.

A Multicast Switching Algorithm Based on iSLIP

  • Lee, Heyung-Sub;Lee, Sang-Yeoun;Lee, Hyeong-Ho;Kim, Whan-Woo
    • Proceedings of the IEEK Conference
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    • 2002.07b
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    • pp.1011-1014
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    • 2002
  • This paper proposes a multicast packet-switching method which can less affect QoS degradation. The method includes a switch fabric with extra switching paths dedicated for multicast packets. Presented also are both a buffering structure and a scheduling algorithm for the proposed method. Simulation analysis for the method shows that the switching delay of unicast packets is decreased even though arrival rate of multicast packets is increased.

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A study on the Development of the Device for Portable Safety Diagnosis and Dynamic Characteristics Analysis of Elevator using Fuzzy Algorithm (Fuzzy 알고리즘을 이용한 엘리베이터 포터블 안전진단 및 동특성 분석장치 개발)

  • 김태형;김훈모
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2000.11a
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    • pp.123-126
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    • 2000
  • An elevator system which is a essential equipment for a vertical movement of object, as a property of building, have been drove by various expenditure and purpose. Since developing electrical control technology, control systems are highly developed. An elevator equipment is expended to wide, but a data accuracy acquisition technique and safety predict technique for securing system safety is still basic level. So, objective verification for elevator confidence condition is required absolutely accuracy measurement technique. Therefore, this study is accomplished in order to conquer a method of depending on sense of a manager with a simple numeric measurement data, and construct a logical, analytical foresight system for more efficient elevator management system.

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Performance Analysis of Input-Output Buffering ATM Switch with Output-port Expansion Mechanism (Output-port Expansion 방법을 사용한 입출력버퍼형 ATM 교환기에서의 셀 손실률 비교 분석)

  • 권세동;강기영;박현민;최병석;박재현
    • Proceedings of the Korean Information Science Society Conference
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    • 1999.10c
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    • pp.411-413
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    • 1999
  • 본 논문에선느 ATM 통신망을 위한 여러 ATM 스위치 모델들 중에서, 내부적으로 블록킹(blocking)이 없고 입출력 단에 각각 버퍼가 할당되어 있는 입출력 버퍼형 교환기에 대하여 연구하였다. 기존에서 스위치 스피드-업(Switch Speed-up) 기법하에서 주로 연구가 이루어졌다. 따라서, 본 논문에서는 유니폼 트래픽하에서 Output-port Expansion 기법을 사용한 귀환.손실 모드 및 하이브리드 모드하에서의 셀 손실률을 비교 분석하였다. Output-port Expansion 기법은, 한 타임 슬롯동안에 입력포트 당 하나의 셀만 교환되며, 만약 하나 이상의 셀들이 같은 출력포트로 향하면, 최대 교환되는 셀 수를 K(Output-port Expansion Ratio)개로 제한하는 방식이다. 유니폼 트래픽(uniform random traffic) 하에서 각 모드에 따른 셀 손실률을 비교 분석한 결과, 로드 0.9를 기점으로, 0.9이하의 로드에서는 하이브리드 모드가, 0.9이상의 로드에서는 손실모드가 가장 낮은 셀 손실률을 보인다.

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A Scheduling Method for QoS Switching of Multicast Packet (Multicast 패킷의 QoS 스위칭을 위한 스케쥴링 방법)

  • 이형섭;김환우
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.26 no.11C
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    • pp.123-132
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    • 2001
  • This paper proposes a sound multicast packet-switching method which can less affect QoS(Quality of Service) degradation. The method includes a switch fabric with extra switching paths dedicated f()r multicast packets. Presented also are both a buffering structure and a scheduling algorithm for the proposed method. Simulation analysis for the method shows that the switching delay of unicast packets is decreased even though arrival rate of multicast packets is increased.

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