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A PERSPECTIVE ON RELIABILITY: PROBABILITY THEORY AND BEYOND

Description: Reliability assessment in the coming era is inclined to be characterized by a difficult dilemma. On the one hand units and systems will be required to be ultra reliable; on the other hand, it may not be possible to subject them to a full-scale testing. A case in point occurs where testing is limited is one-of-a-kind complex systems, such as space exploration vehicles or where severe testing constraints are imposed such as full scale testing of strategic nuclear weapons prohibited by test ban tr… more
Date: May 1, 2001
Creator: BOOKER, J. M. & SINGPURWALLA, N. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

MONTE CARLO PARTICLE TRANSPORT IN MEDIA WITH EXPONENTIALLY VARYING TIME-DEPENDENT CROSS-SECTIONS

Description: A probability density function (PDF) and random sampling procedure for the distance to collision were derived for the case of exponentially varying cross-sections. Numerical testing indicates that both are correct. This new sampling procedure has direct application in a new method for Monte Carlo radiation transport, and may be generally useful for analyzing physical problems where the material cross-sections change very rapidly in an exponential manner.
Date: February 1, 2001
Creator: BROWN, F. & MARTIN, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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FUTURE SAFEGUARDS EFFECTIVENESS: CONCEPTS AND ISSUES

Description: With new safeguards measures (under old and new authority) now available to the International Atomic Energy Agency (IAEA), there will be fundamental changes in the manner IAEA safeguards are implemented, raising questions about their effectiveness in meeting expanded Agency safeguards objectives. In order to characterize the capability of various safeguards approaches in meeting their objectives, it will be necessary to fully understand what is involved in the new safeguards equation. Both old … more
Date: September 1, 2000
Creator: BUDLONG-SYLVESTER, K. W. & PILAT, J. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Global situational awareness and early warning of high-consequence climate change.

Description: Global monitoring systems that have high spatial and temporal resolution, with long observational baselines, are needed to provide situational awareness of the Earth's climate system. Continuous monitoring is required for early warning of high-consequence climate change and to help anticipate and minimize the threat. Global climate has changed abruptly in the past and will almost certainly do so again, even in the absence of anthropogenic interference. It is possible that the Earth's climate co… more
Date: August 1, 2009
Creator: Backus, George A.; Carr, Martin J. & Boslough, Mark Bruce Elrick
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Atomic Capture of $mu$$sup -$ Mesons in Chemical Compounds and The "Fermiteller Z Law"

Description: Experimental studies of the relative atomic mu --meson capture probabilities in the constituents of chemical compounds are described. Fermi and Teller had predicted that the atomic-capture probability is proportional to the nuclear charge of the atomic species weighted by its atomic concentration. This is sometimes referred to as the Fermi-Teller Z law.'' Previous experiments indicated no clear systematics to this capture process, and there are conflicts between the results of several measureme… more
Date: August 20, 1962
Creator: Baijal, J. S.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Negative meson capture in hydrogen. [Ionization cross sections, perturbed stationary state method]

Description: The processes of deexcitation and capture of negative mesons and hadrons in atomic hydrogen are investigated. Only slow collisions in which the projectile-atom relative velocity is less than one atomic unit are considered, and the motion of the incident particle is treated classically. For each classical trajectory the probability of ionizing the hydrogen atom is determined, together with the energy spectrum of the emitted electron. Ionization probabilities are calculated using the time-depende… more
Date: January 1, 1977
Creator: Baird, T. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Prediction of high-energy (> 0. 3 MeV) substorm-related magnetospheric particles. [Probability]

Description: Measurements both at 6.6 R/sub E/ and in the plasma sheet (greater than or equal to 18 R/sub E/) show that high energy substorm-accelerated particles occur preferentially when the solar wind speed (V/sub sw/) is high. Virtually no > 0.3 MeV protons, for example, are observed in association with substorms that occur when V/sub sw/ is < 400 km/sec. On the other hand, the probability of observing high energy protons is very large, both at geostationary orbit and in the plasma sheet, when V/sub sw/… more
Date: January 1, 1979
Creator: Baker, D.N.; Belian, R.D.; Higbie, P.R. & Hones, E.W. Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Analysis of LNG import terminal release prevention systems

Description: The release prevention systems of liquefied natural gas (LNG) import terminal were analyzed. A series of potential release scenarios were analyzed to determine the frequency of the release events, the probability these releases are not stopped or isolated by emergency shutdown systems, the estimated release quantities, and the critical components of the system. The two plant areas identified as being most significant with respect to safety are the unloading system and the storage system. Ruptur… more
Date: April 1, 1982
Creator: Baker, E G
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Deterministic methods for time-dependent stochastic neutron transport

Description: A numerical method is presented for solving the time-dependent survival probability equation in general (lD/2D/3D) geometries using the multi group SNmethod. Although this equation was first formulated by Bell in the early 1960's, it has only been applied to stationary systems (for other than idealized point models) until recently, and detailed descriptions of numerical solution techniques are lacking in the literature. This paper presents such a description and applies it to a dynamic system r… more
Date: January 1, 2009
Creator: Baker, Randal S
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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29th Annual PolyMAC Meeting: Book of Abstracts

Description: A sixteen-run, Resolution IV, fractional factorial screening design has been used to evaluate the relative significance of seven independent material and process variables for an electrically deposited commercial acrylic paint. A Resolution IV design was chosen so that variable interactions could be detected without any interference from the effects of the variables themselves. Because resource limitations did not permit use of a Resolution V design, the two-way interactions were confounded wit… more
Date: July 23, 1999
Creator: Balazs, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Observation of a narrow structure in the pp elastic scattering at T{sub kin} = 2.11 GeV

Description: The angular dependences of the pp elastic scattering analyzing power, spin correlation, depolarization transfer were measured in the angular range from 60{degrees} to 97{degrees} CM at 14 energies between 1.96 and 2 .23 GeV. At fixed angles two maxima were observed in the analyzing Power energy dependence, both below and above 2.11 GeV. Furthermore a rapid decrease Of the spin correlation Parameter at 90{degrees} CM occurs around this energy. The observables allow determination of the absolute … more
Date: February 1, 1996
Creator: Ball, J.; Chamouard, P.A. & Combet, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Statistics of particle concentration in free-surface turbulence

Description: Particles on the surface of an incompressible fluid maintained in a turbulent steady-state cluster into spatio-temporally complex flow structures. We experimentally study the statistics of particle concentration n(r, t) over various coarse-grained scales r' in the inertial range. Another control parameter is the Taylor Microscale Reynolds number Re{sub {lambda}}. The focus is on the steady state probability density function {Pi}(n{sub r}). Attention is also given to the variance {sigma}{sup 2}(… more
Date: January 1, 2009
Creator: Bandi, Mahesh M; Larkin, J & Goldburg, W
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Seismic fragility of nuclear power plant components: Phase 2, Motor control center, switchboard, panelboard and power supply

Description: In Phase I of the Component Fragility Program, Brookhaven National Laboratory (BNL) has developed a procedure to establish the seismic fragility of nuclear power plant equipment by use of existing test data and demonstrated its application by considering two equipment pieces. In Phase II of the program, BNL has collected additional test data, and has further advanced and is applying the methodology to determine the fragility levels of selected essential equipment categories. The data evaluation… more
Date: December 1, 1987
Creator: Bandyopadhyay, K. K.; Hofmayer, C. H.; Kassir, M. K. & Pepper, S. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Plutonium Recycle in the Calder Hall Type Reactor

Description: The economiics and physics of four schemes of pIutonium recycle in the Calder Hall type reactor are considered. The four possible schemes are: (I) to blend the Pu produced In a run with fresh naturaI U for a subsequeut run; (2) to alloy the Pu with somie diIuent metal and fabricate the alloy Into high heat- transfer elements morc like MIR or PWR-sced type elements and"spike' a subsequent load of fresh natural U elemients with these Pu elemicnts; (3) to recycle half the spent U as well as the Pu… more
Date: January 1, 1958
Creator: Barbieri, L. J.; Webster, J. W. & Chow, K. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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High-Temperature Gas-Cooled Reactor Critical Experiment and Its Application

Description: Two types of critical experiments were conducted in support of the 40- Mw(e) Peach Bottom HTGR nucleardesign program. The first was the test-lattice experiment, where detailed measurements of reaction rates were examined in a lattice having a cold neutron spectrum characteristic of the HTGR. This program provided a method for checking the resonance integral of thorium, the Doppler coeificient of thorium, the detailed flux distribution in the lattice, and control-rod effectiveness within a cell.… more
Date: August 1, 1963
Creator: Bardes, R. G.; Brown, J. R.; Drake, M. K.; Fischer, P. U.; Pound, D. C.; Sampson, J. B. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Theoretical research in physics of highly ionized atoms. Final report, March 1, 1975--June 30, 1976. [Preliminary study, transition probabilities, model potential theory, Dirac and Schroedinger equations]

Description: Results of a preliminary study of the use of a model potential approach to the calculation of energy levels and radiative transition probabilities for highly ionized heavy atoms are reported. The calculations were carried out for eight ions in the sodium isoelectronic sequence from Mg II through W LXIV. The technique used involved the solution of the Dirac equation for the single outer valence electron, with a model central potential containing two disposable parameters affecting the potential … more
Date: January 1, 1976
Creator: Bardsley, J N & Norcross, D W
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Probabilistic error analysis of computer arithmetics

Description: The problem of continuous and discrete error distribution for real computer arithmetics is discussed. The existing literature is surveyed. Several new and important theorems are proven. Results are illustrated with 9 figures and 14 tables.
Date: December 1, 1978
Creator: Bareiss, E.H. & Barlow, J.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Binomial moments of the distance distribution and the probability of undetected error

Description: In [1] K.A.S. Abdel-Ghaffar derives a lower bound on the probability of undetected error for unrestricted codes. The proof relies implicitly on the binomial moments of the distance distribution of the code. The authors use the fact that these moments count the size of subcodes of the code to give a very simple proof of the bound in [1] by showing that it is essentially equivalent to the Singleton bound. They discuss some combinatorial connections revealed by this proof. They also discuss some i… more
Date: September 1, 1998
Creator: Barg, A. & Ashikhmin, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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MARKOV Model Application to Proliferation Risk Reduction of an Advanced Nuclear System

Description: The Generation IV International Forum (GIF) emphasizes proliferation resistance and physical protection (PR&amp;PP) as a main goal for future nuclear energy systems. The GIF PR&amp;PP Working Group has developed a methodology for the evaluation of these systems. As an application of the methodology, Markov model has been developed for the evaluation of proliferation resistance and is demonstrated for a hypothetical Example Sodium Fast Reactor (ESFR) system. This paper presents the case of diver… more
Date: July 13, 2008
Creator: Bari, R. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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