http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
ATM망의 단대단 통신로 추적관리의 모델링 및 성능분석
박명환,안중영,조규섭 한국통신학회 1996 韓國通信學會論文誌 Vol.21 No.9
In this paper, a management model and a path trace algorithm are proposed for the end-to-end path tracing management in ATM network. Proposedmodel is based on the TINA(Telecommunication Information Networking Architecture) and computational object(CO) of ODP(Open Distributed Processing).We related computational object for the path trace to another computational object which covers the ATM routing and established operational procedure according to this relationship. This procedure identifies the end-to-end by way of tracing the ATM connections then collect identification information on the that path. End-to-end trace is performed on the network management level. Broadcasting-with-synchronized-control and GTM(Global Ticket Method) are proposed as path trace algorithm considering the real time properties and data ingetrity. Computer simulations are also performed to evaluate the performance of the proposed algorithm and its resuls are shown in this paper. ATM망의 단대단 통신로 추적관리를 위한 모델과 추적 알고리즘을 제시하고 시뮬레이션을 통하여 이 알고리즘의 성능을 분석하였다. 제안 모델은 TINA(Telecommunication Information Networking Architecture)구조와 ODP(Open Distributed Processing)의 계산객체를 기본으로 하였다. 계산객체는 ATM 라우팅 기능을 수행하는 계산객체와 경로 추적을 수행하는 계산객체로 구성하였으며, 이들간의 관계를 기본으로 하는 수행절차를 설정하였다. 이 수행 절차는 연결된 ATM 경로를 추적함으로써 단대단 통신로를 식별하고 이러한 통신로 식별 데이타를 수집하는 과정으로 수행된다. 제안한 단대단 통신로 추적관리는 NML(Networking Management Level) 관점에서 수행되며, 이를 위한 알고리즘으로 실시간 속성과 추적기능의 무결성을 고려하여 broadeasting-with-synchronized-control과 GTM(Global Ticket Method)을 제안하였다.
朴明煥 대구보건대학 1994 대구보건대학 論文集 Vol.14 No.-
The CaSO₄:Tm-PTFE TLDs have been prepared and their energy dependences of TL intensity to X-rays have been investigated. The dose dependence of the prepared CaSO₄:Tm-PTFE TLDs is linear within the range of 10uGy-10Gy for X-rays and gamma rays. The spectral peaks of TL emission spectrum are at about 350㎜ 475㎜. The fading rate of the main peak has been found to be about 2% for 30days when CaSO₄:Tm-PTFE TLDs stored in the dark room at room temperature. The energy dependence of CaSO₄:Tm-PTFE TLD has been compensated by combining the TL responses of one bare TLD and five TLDs filtered with 10.㎜ Al, 0.2㎜ Cu, 0.5㎜ Cu, 1.5㎜ Cu, 2.0㎜ Pb respectively. The determined correction coefficients for filter combination are a_(0)=0.078, a₁=-0.009, a₂=-0.235, a₃=0.588, a₄=0.568 and a_(5)=0.180 respectively. From the results of these studies, the prepared TLD badge of six dosimeter combination may be useful as a radiation dosimeter for personal and environmental monitoring.
박명환 대구보건대학 2001 대구보건대학 論文集 Vol.21 No.-
We compared the inverter type X-ray equipment with the conventional single phase 2 peak for the output and quality obtained by changes of the added filter thickness and the tube voltage. The X-ray quality of X-ray generator showed increase for the tube voltage and the added filter. The half value layer and effective energy is increased the thicker the filter and the higher the kVp. The output and quality of the inverter type in comparison with the single phase 2 peak X-ray generator is increase.
Computation of the Steady State System Size Probability of Multiple-class M/G/1 Queue
박명환 漢城大學校 1991 論文集 Vol.15 No.1
본 논문은 여러 계층의 고객(Multiple-Class Customer)이 단일 server에 service의해 를 받는 대기행렬 모형에 관한 것으로 서로 다른 계층의 고객들의 도착이 별도의 도착율을 갖는 Poisson process를 따르며 service시간 분포 또한 개별적으로 일반적인 분포를 갖는 모형(multiple-class M/G/1 Queueing Model)을 다룬다. 이러한 모형의 계층별 평균체류시간(Mean Sojourn Time)등은 이미 분석이 되어 있지만 정상상태(Steady state)에서의 고객의 수에 대한 확률 Pij...k(어느 시점에 system내에 i명의 class-1고객, j명의 class-2고객, …, K명의 class-p 고객이 있을 확률)에 대해서는 분석이 되어있지 않다. 이러한 확률은 대기모형의 최적화 문제를 고려할때 다양한 형태의 비용함수가 고려될 경우(특히 비선형 함수인 경우) 그 필요성이 대두된다. 본 논문에서는 두 계층의 고객(two-class customer)이 있고 service원칙이 LCFS(Last Come First Served)를 따르는 모형의 정상상태의 고객수에 대한 확률을 계산하는 과정을 Busy Period내의 고객수의 변화를 분석함으로써 도출하였다. 세 계층 이상이 고려되는 모형의 경우는 두 계층 모형의 일반화된 상황으로 이해하여 계산과정을 증명없이 제시하였다.
박명환 대구보건대학 2002 대구보건대학 論文集 Vol.22 No.-
The computed radiography system has been changed by the film-screen, and X-ray equipment has been changed by the inverter type, which is more stable than the conventional type. I compared the exposure dose, HVL(half value layer) and effective energy of the inverter type X-ray equipments by computed radiography. The X-ray quality of X-ray generator showed increase for the tube voltage. The HVL and effective energy is increased the higher tube voltage. When a radiograph was taken under the same conditions in each radiography room, dose changed according to the equipments.
방사선 치료 환자의 자세 및 Device에 따른 RPM 신호 분석을 통한 호흡 안정성의 통계적 고찰
박명환,서정민,최병기,신은혁,송기원,Park, Myung-Hwan,Seo, Jeong-Min,Choi, Byeong-Gi,Shin, Eun-Hyeok,Song, Gi-Won 대한방사선치료학회 2011 대한방사선치료학회지 Vol.23 No.2
Purpose: This study statistically analyzed the difference of the stability of maintaining a respiratory period shown according to position and use of a device to search the tendency and usefulness of a device. Materials and Methods: The study obtained respiratory signals which maintained a respiratory period for 20 minutes each supine and prone position for 11 subjects. The study obtained respiratory signals in a state of using a belly board for 7 patients in a bad condition of a respiratory period in a prone position to analyze a change in respiration and the stability before and after the use of a device. Results: The supine part showed 54.5%, better than the prone part of 36.4% in a case that the stability for maintaining a respiratory period was in a good condition as a fixed respiratory period was well maintained according to the position. 6 patients (85%) showed a maintenance pattern of a respiratory period significantly different before the use and 4 patients showed a significantly good change in the stability for maintaining a respiratory period as a result that belly boards were used for 7 patients that the maintenance of a respiratory period was not in a good condition on a prone position. Conclusion: It seemed that this study could contribute to the maintenance of respiratory period and of respiratory stability as the optimal position for maintenance of respiration and the use of a device such as a belly board were decided through statistic analysis of respiratory signals and its application even if patient position and use of device were decided by the beam arrangement a treatment part of a patient, location of a target, and an expected plan.