• Title/Summary/Keyword: AMS

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THE BEST CHOICE OF SUBSAMPLE SIZE (m,k) IN 3 STAGE SAMPLING (3단계 표본 추출에 있어서 부차표본(m,k)의 최상 선택)

  • 정훈조
    • Journal of applied mathematics & informatics
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    • v.3 no.1
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    • pp.101-115
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    • 1996
  • In this paper we extend the best choice of subsample size m in the 2-stage sampling which suggested by Mohammad(1986) to the 3-stage sampling in cases of known and of unknown cost and variance ratio. We find the subsample size m.k which ensures more than the relative efficiency 90% Also we see that the choice of 3-stage subsample size depends on the design parameters using in 2-stage sampling.

IPv6 Next Generation Internet Exchange Trend (IPv6 기반 차세대 인터넷 교환노드 기술 동향)

  • Shin, M.K.;Lee, S.Y.;Kim, Y.J.;Lee, J.H.
    • Electronics and Telecommunications Trends
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    • v.15 no.6 s.66
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    • pp.18-25
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    • 2000
  • 본 고에서는 IPv6 기반 차세대 인터넷 교환노드 구축 동향 및 IPv6 시험망 구성을 위한 방법을 소개한다. 먼저 미국의 6TAP, 유럽의 AMS-IX. 일본의 NSPIXP-6 등 전세계 3대 IPv6 교환노드 구축 기술 및 현황을 살펴보고, IPv6 기반 시험망 구성을 위한 요구사항, 구축 사양 및 환경, 그리고 실제로 구축한 IPv6 시범 사이트의 예를 기술한다.

A Method of Evaluation Quality Cost in AMS (AMS에 있어서 품질비용평가 방법)

  • 하정진;황규완
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.16 no.28
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    • pp.129-135
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    • 1993
  • Quality is become not only the most critical component of manufacturing strategy but also the most critical measure of performance and justification of advanced manufacturing system. The objective of this paper is to offer classification & optimum concept of quality-cost and to illustrate a method of evaluation quality-cost then a case example is presented to illustrate the result of quantifying the suggested formula and these values are given to justify of management.

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Convergence of weighted sums of linearly negative quadrant dependent random variables (선형 음의 사분 종속확률변수에서 가중합에 대한 수렴성 연구)

  • Lee, Seung-Woo;Baek, Jong-Il
    • Journal of Applied Reliability
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    • v.12 no.4
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    • pp.265-274
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    • 2012
  • We in this paper discuss the strong law of large numbers for weighted sums of arrays of rowwise LNQD random variables by using a new exponential inequality of LNQD r.v.'s under suitable conditions and we obtain one of corollary.

라디칼 손실 제어를 통한 고선택비 산화막 식각

  • Kim, Jeong-Hun;Lee, Ho-Jun;Hwang, Gi-Ung;Ju, Jeong-Hun
    • Proceedings of the Korean Vacuum Society Conference
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    • 1995.06a
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    • pp.81-82
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    • 1995
  • 약한 자장을 사용하는 평면형 유도 결합 플라즈마 식각 장치에서 라디카르이 농도 제어를 위하여 벽면온도를 증가시켜 라디칼 손실을 줄였다. 폴리머를 잘 형성하는 C4F8의 경우 이에 따라 식각 특성이 25%정도 개선되었고, OES(opptical emission sppectroscoppy)와 AMS(appearance mass sppectroscoppy)를 이용하여 라디칼과 이온의 밀도 변화를 측정하여 식각 결과를 설명할 수 있었으며, 반면에 CF4의 경우 큰변화를 볼 수 없었다.

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X-ray properties of PWNe measured with the NuSTAR telescopes

  • An, Hongjun
    • The Bulletin of The Korean Astronomical Society
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    • v.43 no.2
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    • pp.43.1-43.1
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    • 2018
  • Young pulsar wind nebulae, powered by energetic central pulsars, are often observed as bright extended sources in the X-ray band. They are believed to accelerate electrons and positrons to very high energy and can possibly explain the positron excess observed by Fermi and AMS. The electron distribution in these PWNe can be best studied by X-ray satellites because emission in the X-ray band is produced by direct synchrotron radiation of the electrons and positrons. We present NuSTAR studies of PWNe and discuss the implication. Future studies to help further our understanding of particle acceleration will be briefly discussed.

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FIXED POINT THEOREMS IN CONTROLLED RECTANGULAR METRIC SPACES

  • Mohamed Rossafi;Abdelkarim Kari
    • The Pure and Applied Mathematics
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    • v.30 no.2
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    • pp.169-190
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    • 2023
  • In this paper, we introduce an extension of rectangular metric spaces called controlled rectangular metric spaces, by changing the rectangular inequality in the definition of a metric space. We also establish some fixed point theorems for self-mappings defined on such spaces. Our main results extends and improves many results existing in the literature. Moreover, an illustrative example is presented to support the obtained results.

Structural health monitoring of seismically vulnerable RC frames under lateral cyclic loading

  • Chalioris, Constantin E.;Voutetaki, Maristella E.;Liolios, Angelos A.
    • Earthquakes and Structures
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    • v.19 no.1
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    • pp.29-44
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    • 2020
  • The effectiveness and the sensitivity of a Wireless impedance/Admittance Monitoring System (WiAMS) for the prompt damage diagnosis of two single-storey single-span Reinforced Concrete (RC) frames under cyclic loading is experimentally investigated. The geometrical and the reinforcement characteristics of the RC structural members of the frames represent typical old RC frame structure without consideration of seismic design criteria. The columns of the frames are vulnerable to shear failure under lateral load due to their low height-to-depth ratio and insufficient transverse reinforcement. The proposed Structural Health Monitoring (SHM) system comprises of specially manufactured autonomous portable devices that acquire the in-situ voltage frequency responses of a network of twenty piezoelectric transducers mounted to the RC frames. Measurements of external and internal small-sized piezoelectric patches are utilized for damage localization and assessment at various and increased damage levels as the magnitude of the imposed lateral cycle deformations increases. A bare RC frame and a strengthened one using a pair of steel crossed tension-ties (X-bracing) have been tested in order to check the sensitivity of the developed WiAMS in different structural conditions since crack propagation, damage locations and failure mode of the examined frames vary. Indeed, the imposed loading caused brittle shear failure to the column of the bare frame and the formation of plastic hinges at the beam ends of the X-braced frame. Test results highlighted the ability of the proposed SHM to identify incipient damages due to concrete cracking and steel yielding since promising early indication of the forthcoming critical failures before any visible sign has been obtained.

System Requirements and UseCase for Mobility Impared People (교통약자 지원시스템을 위한 요구사항과 유즈케이스)

  • Nam, Doo-Hee;Lim, Kwan-Su
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.6 no.1 s.12
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    • pp.58-71
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    • 2007
  • The disabled and elderly people have a wide variety of functional impairments. By disability and elderly user group definition, identification of users needs and specification of content requirements were studied. Existing technologies including location, navigation and information exchange devise and communication systems were analyzed to design proper integrated system for indoor and outdoor uses. There are two types of services considered in the project: assisted living services(ALS) including health and emergency needs and assisted mobility services(AMS) with transportation needs. To develop each content, content identification and requirements was studied through interviews and expert consultations. System requirements and specification using usecase technique for disabled and elderly people are discussed.

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