• Title/Summary/Keyword: g-operations

Search Result 538, Processing Time 0.024 seconds

COMS SOC 13M ANTENNA G/T MEASUREMENT

  • Park, Durk-Jong;Yang, Hyung-Mo;Ahn, Sang-Il
    • Proceedings of the KSRS Conference
    • /
    • 2007.10a
    • /
    • pp.489-492
    • /
    • 2007

  • At COMS SOC, 13m antenna system will serve to transmit command and receive telemetry in S-Band for COMS operation. In addition, Sensor Data and LRIT/HRIT in L-Band will be received and LRIT/HRIT in S-Band will be transmitted through this antenna system. In many cases, G/T is used as barometer to estimate the receiving capability of antenna system. To estimate G/T, this paper presents two approaches, one is analysis based on the specification of antenna and RF equipment while the other is measurement by using Sun. From the results, G/T was proven as more than 20dB/K and it means that the required G/T, 19dB/K is verified successfully.

  • PDF

A Note on the Inter-Loss Time Distribution of an M/G/1/1 Queuing System (M/G/1/1 대기체계의 고객 손실간격 분포에 대한 소고)

  • Lee, Doo Ho
    • Journal of the Korean Operations Research and Management Science Society
    • /
    • v.41 no.3
    • /
    • pp.37-43
    • /
    • 2016

  • This note discusses the inter-loss time ofan M/G/1/1 queuing system. The inter-loss time is defined as the time duration between two consecutive losses of arriving customers. In this study, we present the explicit Laplace transform of the inter-loss time distribution of an M/G/1/1 queuing system.

  • https://doi.org/10.7737/JKORMS.2016.41.3.037 인용 PDF

Waiting Times in the B/G/1 Queue with Server Vacations

  • Noh, Seung-Jong
    • Journal of the Korean Operations Research and Management Science Society
    • /
    • v.19 no.3
    • /
    • pp.235-241
    • /
    • 1994

  • We consider a B/G/1 queueing with vacations, where the server closes the gate when it begins a vacation. In this system, customers arrive according to a Bernoulli process. The service time and the vacation time follow discrete distributions. We obtain the distribution of the number of customers at a random point in time, and in turn, the distribution of the residence time (queueing time + service time) for a customer. It is observed that solutions for our discret time B/G/1 gated vacation model are analogous to those for the continuous time M/G/1 gated vacation model.

  • PDF

Modeling Optimal Lane Configuration at the Toll Plaza by Nonlinear Integer Programming Incorporated with an M/G/1 Queueing Process

  • Kim, Seong-Moon
    • Proceedings of the Korean Operations and Management Science Society Conference
    • /
    • 2006.11a
    • /
    • pp.403-406
    • /
    • 2006

  • This paper provides an M/G/1 queueing model for the operations management problem at the toll plaza. This queueing process is incorporated with two non-linear integer programming models - the user cost minimization model during the peak times and the operating cost minimization model during the off-peak hours.

  • PDF

An Analysis of the Relationship between Students' Understanding and their Word Problem Solving Strategies of Multiplication and Division of Fractions (분수의 곱셈과 나눗셈에 대한 학생의 이해와 문장제 해결의 관련성 분석)

  • Kim, Kyung-Mi;Whang, Woo-Hyung
    • The Mathematical Education
    • /
    • v.50 no.3
    • /
    • pp.337-354
    • /
    • 2011

  • The purpose of the study was to investigate how students understand multiplication and division of fractions and how their understanding influences the solutions of fractional word problems. Thirteen students from 5th to 6th grades were involved in the study. Students' understanding of operations with fractions was categorized into "a part of the parts", "multiplicative comparison", "equal groups", "area of a rectangular", and "computational procedures of fractional multiplication (e.g., multiply the numerators and denominators separately)" for multiplications, and "sharing", "measuring", "multiplicative inverse", and "computational procedures of fractional division (e.g., multiply by the reciprocal)" for divisions. Most students understood multiplications as a situation of multiplicative comparison, and divisions as a situation of measuring. In addition, some students understood operations of fractions as computational procedures without associating these operations with the particular situations (e.g., equal groups, sharing). Most students tended to solve the word problems based on their semantic structure of these operations. Students with the same understanding of multiplication and division of fractions showed some commonalities during solving word problems. Particularly, some students who understood operations on fractions as computational procedures without assigning meanings could not solve word problems with fractions successfully compared to other students.

  • https://doi.org/10.7468/mathedu.2011.50.3.337 인용 PDF KSCI