• Title/Summary/Keyword: Statistic Analysis

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Analysis on Failure Statistics of Cyclotron Component (사이클로트론 구성부품별 고장통계분석)

  • Cho, June-Ho;Jung, Jae-Eun;Jung, Hong-Moon;Won, Do-Yeon
    • Korean Journal of Digital Imaging in Medicine
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    • v.16 no.1
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    • pp.61-67
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    • 2014
  • The demand of cyclotron for PET (positron emission tomography) has rapidly grown as the more use of PET or PET-CT equipment requires the increased amount of radioactive isotopes for clinical positron emission. While research on failure statistics of medical equipment used in medical centers has continued to be done, the analysis and study on failure statistics of cyclotron have rarely been conducted. However, the growing demand shows the urgency of systematical management guideline and countermeasures for device failure to minimize any supply delay of radiopharmaceuticals occurred by such failure and complains from waiting patients for PET-CT diagnosis. Therefore, this study aims to analyze the failure report from Minitrace equipped in cyclotron which is owned by the department of nuclear medicine at Yeungnam University Medical Center and draws on the data to build effective management system for cyclotron.

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Workload Distribution and Performance Analysis Simulation for a Distributed Server Cluster System (분산 서버 클러스터 시스템의 부하 분산 및 성능 분석 시뮬레이션)

  • 최은미;이원규
    • Journal of the Korea Society for Simulation
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    • v.12 no.4
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    • pp.103-111
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    • 2003
  • A distributed sewer cluster system is a cost-effective system to provide a service application for clients with reliable, scalable, available, and fault-tolerant features. In order to provide high quality services, it is necessary to evaluate service performances, tune the server system, and analyze performances. In this paper, we propose a simulator to generate workloads based on statistic configuration according to estimated application traffics, apply workload scheduling algorithms, and evaluate the simulation results. We introduce the simulator design modelling and architecture. By using flexible parameters, the simulator is able to generate various patterns of workloads with different statistics, and configure system environments such as the number of server nodes, system resources considered, and their capacities. With this simulator, we introduce two scenarios: one is to find appropriate thresholds for the best performance of cluster system, and the other is to find the suitable scheduling algorithm for workload characteristics of service applications.

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Gesture Recognition Using Higher Correlation Feature Information and PCA

  • Kim, Jong-Min;Lee, Kee-Jun
    • Journal of Integrative Natural Science
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    • v.5 no.2
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    • pp.120-126
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    • 2012
  • This paper describes the algorithm that lowers the dimension, maintains the gesture recognition and significantly reduces the eigenspace configuration time by combining the higher correlation feature information and Principle Component Analysis. Since the suggested method doesn't require a lot of computation than the method using existing geometric information or stereo image, the fact that it is very suitable for building the real-time system has been proved through the experiment. In addition, since the existing point to point method which is a simple distance calculation has many errors, in this paper to improve recognition rate the recognition error could be reduced by using several successive input images as a unit of recognition with K-Nearest Neighbor which is the improved Class to Class method.

Pitching grade index in Korean pro-baseball (한국프로야구에서의 투수평가지표)

  • Lee, Jang Taek
    • Journal of the Korean Data and Information Science Society
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    • v.25 no.3
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    • pp.485-492
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    • 2014
  • In baseball, the traditional measure of pitchers are wins and ERA. But these statistics are influenced by luck or team power. So sabermetrician proposes a number of indicators that predict future performance. We determine a new measure, which we call pitching grade index (PGI) that efficiently summarizes a pitcher's performance on a numerical scale using principal components analysis. The PGI statistic can often be useful to assessing a pitcher's individual contribution. Also K-means clustering algorithm are used for segmentation of players into groups.

A Comparative Analysis of Undergraduate and Postgraduate Training in Health Care Management

  • Kong, Myung-Dalm
    • Industrial Engineering and Management Systems
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    • v.15 no.3
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    • pp.239-250
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    • 2016
  • This study is to prepare curriculum in South Korea to train outstanding individual in the fields of Health Care Management for the global age, hospitals' administration managers, professors and students were targeted to carry out the survey and the collected questionnaires were processed with SPSS Ver. 21.0 statistic package, based on this the suitability of the current Health Care Management curriculum and postgraduate curriculum was inspected and improvement plan was deducted, and also through comparative analysis of the Health Care Management curriculum for undergraduate and postgraduate in the United Kingdom and United States, optimum improvement suggestions were made. Based on the research result, the priority to improve and consolidate from undergraduate curriculum was the strengthening of the working-level education, the most needed ability in the future is global negotiation and dispute/conflict adjustment which needs supplementation. Also, after analyzing the undergraduate curriculum of the United States and United Kingdom, it is needed that the development of the capacity to lead organizations for healthcare and subjects for the establishment of health policy should be reflected.

Statistic Pattern Analysis of HFPD According to Applied Stress (인가 스트레스에 따른 HFPD의 통계적 패턴해석)

  • Kim, Duck-Keun;Lee, Eun-Suk;Jung, Young-Ill;Lim, Jang-Seub;Kim, Tae-Sung
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2000.05a
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    • pp.18-22
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    • 2000
  • The partial discharge testing is widely used in insulation property measurement because it gives low stress to high voltage equipment which is undertaken tests. Therefore it is very useful method compare to previous destructive methods and effective diagnosis method in power transformer that requires live-line diagnosis. But partial discharges have very complex characteristics of discharge pattern so it is required continuous research to development of precise analysis method. In recent, the study of partial discharge is carrying out discover of initial defect of power equipment through condition diagnosis and system development of degradation diagnosis using HFPD(High Frequency Partial Discharge) detection. In this study, simulated transformer is manufactured and HFPD occurred from transformer is measured with broad band antenna in real time, the degradation grade of transformer is analyzed through produced patterns in simulated transformer according to applied voltages.

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Experimental analysis on the motion response of the small fishing boat toward wave direction (실선 시험에 의한 소성어업의 동요특성)

  • 강일권;윤점동
    • Journal of the Korean Institute of Navigation
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    • v.19 no.1
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    • pp.1-8
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    • 1995
  • The motion of a small boat in seas is affected in relatively higher degrees than the case of a larger ship by the specific characteristics of sea waves, i.e., the wave length and height. Ship's motion caused by sea waves is a matter of special importance to small fishing boats, because they carry out fishing job in rough seas frequently. This is an experimental study on the rolling and pitching motions of full scale ship. In the experiment, the ship's motions were measured for head, how, beam, quarter and following seas. The experiment were carried out on board the training ship Pusan 404(160 GT) in the adjacent waters off NAM HYENG JAE DO on Dec. 13th 1994. The sea condition during the measurements was that wave height 2.5m, no swell and the wind velocity of 12 m/sec. Some statistic considerations were given to the observed data by the series analysis methods and discussed in this paper.

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Statistical Correction Analysis between Transmission Line Outage Data and Weather Effect in KEPCO Systems (송전선로 고장실적과 날씨와의 통계적 상관관계 분석)

  • Shin Dong Suk;Kim Jin O;Cha Seung Tae;Jeon Dong Hoon;Choo Jin Bu
    • Proceedings of the KIEE Conference
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    • summer
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    • pp.391-393
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    • 2004
  • Transmission line outage is influenced by several weather factors: wind, rain snow, temperature, cloud and humidity. So, in this paper try to see how much each weather factors have effect on the transmission line outage and it is analyzed that which weather variables have close relation with transmission line historical outage data in KEPCO systems. These statistic correlation analysis may provide system operators useful information about system operation and planing.

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Workload Distribution and Performance Analysis Simulation for a Distributed Server Cluster System (분산 서버 클러스터 시스템의 부하 분산 및 성능 분석 시뮬레이션)

  • 최은미;이원규
    • Proceedings of the Korea Society for Simulation Conference
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    • 2003.11a
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    • pp.27-34
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    • 2003
  • A distributed server cluster system is a cost-effective system to provide a service application for clients with reliable, scalable, available, and fault-tolerant features. In order to provide high quality services, it is necessary to evaluate service performances, tune the server system, and analyze performances. In this paper, we propose a simulator to generate workloads based on statistic configuration according to estimated application traffics, apply workload scheduling algorithms, and evaluate the simulation results. We introduce the simulator design modelling and architecture. By using flexible parameters, the simulator is able to generate various patterns of workloads with different statistics, and configure system environments such as the number of server nodes, system resources considered, and their capacities. With this simulator, we introduce two scenarios: one is to find appropriate thresholds for the best performance of cluster system, and the other is to find the suitable scheduling algorithm for workload characteristics of service applications.

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A Study of the Single PPM Quality Innovation's Movement and Satisfaction in the Enterprise (싱글PPM 품질혁신 운동과 기업의 만족도에 관한 연구)

  • Kim, Tae-Sung;Koo, Il-Seob
    • Proceedings of the Safety Management and Science Conference
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    • 2008.11a
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    • pp.145-152
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    • 2008
  • Single PPM Quality Innovation Movement is originally developed quality program in Korea for supplier's quality level-up since 1995. The quality target is below the 10ppm(parts per million) in outgoing quality and delivered goods plus field claim. This Single PPM Quality Innovation Movement program was conducted to realize the anticipated results not only due to management result level's increasing, but also the company's confidence and competitiveness. This study attempted to find the mutual influences on the participation of the constituent members, satisfaction of the constituent members and results of the management from Single PPM Quality Innovation Movement. The reliance analysis for the measurement material on the questionnaire was verified by Cronbach's alpha coefficient. Participation of the constituent members, satisfaction of the constituent member and result of the management, the influences upon Single PPM improvement degree level were verified through the structural analysis by using SPSS statistic package. The influence evaluation among the groups was evaluated by the structure equation.

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