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in subjects: "Probability"

open access

Reliability of CRBR primary piping: critique of stress-strength overlap method for cold-leg inlet downcomer

A critique is presented of the strength-stress overlap method for the reliability of the CRBR primary heat transport system piping. The report addresses, in particular, the reliability assessment of WARD-D-0127 (Piping Integrity Status Report), which is part of the CRBR PSAR docket. It was found that the reliability assessment is extremely sensitive to the assumed shape for the probability density function for the strength (regarded as a random variable) of the cold-leg inlet downcomer section … more

Date: April 1, 1976

Creator: Bari, R. A.; Buslik, A. J. & Papazoglou, I. A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Analyses of releases due to drilling at the potential Yucca Mountain repository

Radionuclide releases due to drilling into the potential Yucca Mountain nuclear-waste repository have been evaluated as part of a recent total-system performance assessment. The probability that a drilling event intersects a waste package is a function of the sizes of the drill bit and the waste package, and the density of placement of the containers in the repository. The magnitude of the releases is modeled as a random function that also depends on the amount of decay the radionuclides have u… more

Date: April 1, 1994

Creator: Barnard, R.W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A probabilistic model for estimating the waiting time until the simultaneous collapse of two contingencies

The Double Contingency Principle (DCP) is widely applied to criticality safety practice in the United States. Most practitioners base their application of the principle on qualitative, intuitive assessments. The recent trend toward probabilistic safety assessments provides a motive to search for a quantitative, probabilistic foundation for the DCP. A Markov model is tractable and leads to relatively simple results. The model yields estimates of mean time to simultaneous collapse of two continge… more

Date: June 1, 1991

Creator: Barnett, C. S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Statistical validation of system models

It is common practice in system analysis to develop mathematical models for system behavior. Frequently, the actual system being modeled is also available for testing and observation, and sometimes the test data are used to help identify the parameters of the mathematical model. However, no general-purpose technique exists for formally, statistically judging the quality of a model. This paper suggests a formal statistical procedure for the validation of mathematical models of systems when data … more

Date: January 1, 1997

Creator: Barney, P.; Ferregut, C.; Perez, L. E.; Hunter, N. F. & Paez, T. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Authentication of quantum messages.

Authentication is a well-studied area of classical cryptography: a sender A and a receiver B sharing a classical private key want to exchange a classical message with the guarantee that the message has not been modified or replaced by a dishonest party with control of the communication line. In this paper we study the authentication of messages composed of quantum states. We give a formal definition of authentication in the quantum setting. Assuming A and B have access to an insecure quantum ch… more

Date: January 1, 2001

Creator: Barnum, Howard; Crépeau, Jean-Claude; Gottesman, D. (Daniel); Smith, A. (Adam) & Tapp, Alan

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

On sequential dynamical systems and simulation

The generic structure of computer simulations motivates a new class of discrete dynamical systems that captures this structure in a mathematically precise way. This class of systems consists of (1) a loopfree graph {Upsilon} with vertex set {l_brace}1,2,{hor_ellipsis},n{r_brace} where each vertex has a binary state, (2) a vertex labeled set of functions (F{sub i,{Upsilon}}:F{sub 2}{sup n} {r_arrow} F{sub 2}{sup n}){sub i} and (3) a permutation {pi} {element_of} S{sub n}. The function F{sub i,{U… more

Date: June 1, 1999

Creator: Barrett, C. L.; Mortveit, H. S. & Reidys, C. M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Probabilistic fracture mechanics analysis of APT blanket tubes

A probabilistic fracture mechanics (PFM) model that is specific to the Accelerator Production of Tritium (APT) helium tubes was developed. The model performs Monte Carlo analyses of potential failure modes caused by cyclic stresses generated by beam trips and depressurizations 60m normal operation, coupled with material aging due to irradiation. Dominant failure probabilities are due to crack through-growth while brittle fracture and ductile tearing have lower probability. Failure mechanisms of… more

Date: January 1, 2001

Creator: Barsell, A. W. (Arthur W.) & Kern, K. T. (Kristen T.)

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Systems analysis approach to probabilistic modeling of fault trees

A method of probabilistic modeling of fault tree logic combined with stochastic process theory (Markov modeling) has been developed. Systems are then quantitatively analyzed probabilistically in terms of their failure mechanisms including common cause/common mode effects and time dependent failure and/or repair rate effects that include synergistic and propagational mechanisms. The modeling procedure results in a state vector set of first order, linear, inhomogeneous, differential equations des… more

Date: January 1, 1985

Creator: Bartholomew, R.J. & Qualls, C.R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A stochastic learning algorithm for layered neural networks

The random optimization method typically uses a Gaussian probability density function (PDF) to generate a random search vector. In this paper the random search technique is applied to the neural network training problem and is modified to dynamically seek out the optimal probability density function (OPDF) from which to select the search vector. The dynamic OPDF search process, combined with an auto-adaptive stratified sampling technique and a dynamic node architecture (DNA) learning scheme, co… more

Date: December 31, 1992

Creator: Bartlett, E. B. & Uhrig, R. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Radiological risk analysis of potential SP-100 space mission scenarios

This report presents a radiological risk analysis of three representative space mission scenarios utilizing a fission reactor. The mission profiles considered are: a high-altitude mission, launched by a TITAN IV launch vehicle, boosted by chemical upper stages into its operational orbit, a interplanetary nuclear electric propulsion (NEP) mission, started directly from a shuttle parking orbit, a low-altitude mission, launched by the Shuttle and boosted by a chemical stage to its operational orbi… more

Date: August 19, 1988

Creator: Bartram, B. W. & Weitzberg, A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Mycielski-Regular Measures

Let μ be a Radon probability measure on M, the d-dimensional Real Euclidean space (where d is a positive integer), and f a measurable function. Let P be the space of sequences whose coordinates are elements in M. Then, for any point x in M, define a function ƒn on M and P that looks at the first n terms of an element of P and evaluates f at the first of those n terms that minimizes the distance to x in M. The measures for which such sequences converge in measure to f for almost every sequence a… more

Date: August 2011

Creator: Bass, Jeremiah Joseph

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

A reassessment of the potential for an alpha-mode containment failure and a review of the current understanding of broader fuel-coolant interaction issues. Second steam explosion review group workshop

This report summarizes the review and evaluation by experts of the current understanding of the molten fuel-coolant interaction (FCI) issues covering the complete spectrum of interactions, i.e., from mild quenching to very energetic interactions including those that could lead to the alpha-mode containment failure. Of the eleven experts polled, all but two concluded that the alpha-mode failure issue was resolved from a risk perspective, meaning that this mode of failure is of very low probabili… more

Date: August 1996

Creator: Basu, S. & Ginsberg, T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Emergency ac power systems operating experience at US nuclear power plants, 1976 through 1983. [Diesel generator]

Success and failure data of test and emergency starts of emergency ac power sources (diesel generators) at US nuclear power plants were collected and evaluated to estimate diesel generator reliability parameters. A regression analysis of the estimates of the probability of failure to start based on surveillance test data from 1976 through 1983 indicates that the probability of failure to start has been decreasing. However, the reliability of diesel generator performance during losses of off-sit… more

Date: January 1, 1985

Creator: Battle, R.E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Measurement of {Delta}m{sub d} using a probability based same-side tagger applied to lepton + vertex events

No Description Available.

Date: December 5, 2000

Creator: Bauer, Gerry

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Resonance Integrals and Self-Shielding Factors for Detector Foils

>Effective activation resonance integrals for thin and thick foils in an isotropic neutron flux were measured by a cadmium ratio method. Gold was used as a standard. Values obtained for dilute resonance integrals in barns, not including 1/v capture, were: Au/sup 197/, 1390 plus or minus 40 (Reference); U/ sup 238/ capture, 280 plus or minus 10; Cu/sup 63/, 3.17 plus or minus 0.18; Cu/sup 65/, 1.39 plus or minus 0.22; Mo/sup 98/, 9.9 plus or minus 1.1; Mo/sup 100/, 4.06 plus or minus 0.23; W/… more

Date: January 1, 1963

Creator: Baumann, N. P.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Detecting isotopic ratio outliers

An alternative method is proposed for improving isotopic ratio estimates. This method mathematically models pulse-count data and uses iterative reweighted Poisson regression to estimate model parameters to calculate the isotopic ratios. This computer-oriented approach provides theoretically better methods than conventional techniques to establish error limits and to identify outliers. 6 refs., 3 figs., 3 tabs.

Date: January 1, 1985

Creator: Bayne, C.K. & Smith, D.H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Fiscal Year 2008 Phased Construction Completion Report for EU Z2-33 in Zone 2, East Tennessee Technology Park, Oak Ridge, Tennessee

The Record of Decision for Soil, Buried Waste, and Subsurface Structure Actions in Zone 2, East Tennessee Technology Park, Oak Ridge, Tennessee (DOE/OR/01-2161&D2) (Zone 2 ROD) acknowledged that most of the 800 acres in Zone 2 were contaminated, but that sufficient data to confirm the levels of contamination were lacking. The Zone 2 ROD further specified that a sampling strategy for filling the data gaps would be developed. The Remedial Design Report/Remedial Action Work Plan for Zone 2 Soi… more

Date: September 11, 2008

Creator: Bechtel Jacobs

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Fiscal Year 2010 Phased Construction Completion Report for EU Z2-32 in Zone 2, East Tennessee Technology Park, Oak Ridge, Tennessee

The Record of Decision for Soil, Buried Waste, and Subsurface Structure Actions in Zone 2, East Tennessee Technology Park, Oak Ridge, Tennessee (DOEIORJO 1-2161 &D2) (Zone 2 ROD) acknowledged that most of the 800 acres in Zone 2 were contaminated, but that sufficient data to confirm the levels of contamination were lacking. The Zone 2 ROD further specified that a sampling strategy for filling the data gaps would be developed. The Remedial Design Report/Remedial Action Work Plan for Zone 2 S… more

Date: February 1, 2010

Creator: Bechtel Jacobs

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

A Bayes-Maximum Entropy method for multi-sensor data fusion

In this paper we introduce a Bayes-Maximum Entropy formalism for multi-sensor data fusion, and present an application of this methodology to the fusion of ultrasound and visual sensor data as acquired by a mobile robot. In our approach the principle of maximum entropy is applied to the construction of priors and likelihoods from the data. Distances between ultrasound and visual points of interest in a dual representation are used to define Gibbs likelihood distributions. Both one- and two-dimen… more

Date: January 1, 1991

Creator: Beckerman, M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Sampling plans to find faulty waste storage drums

In environmental surveillance work, one is often faced with the task of determining by a random sample that hazardous waste is stored safely. In many cases such waste is kept in drums which are accumulated at various sites, and some of these sites are thought to have a more deleterious effect on the drums than other sites. In this paper, knowledge'' of the sites is used to develop sampling plans which increase the probability of finding faulty drums. An exchange algorithm to determine the sampl… more

Date: January 1, 1990

Creator: Beckman, R. J. & McKay, M. D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Computational problems related to a new probability distribution

Some computational problems related to a new probability distribution recently developed by the authors are described. This distribution can be viewed as a generalization of the exponential power distribution. The three topics discussed here are density and distribution function evaluation, moment matching, and random variate generation. 1 figure, 1 table.

Date: January 1, 1979

Creator: Beckman, R. J.; Johnson, M. E. & Tietjen, G. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

PROBABILITY MODEL FOR THERMOLUMINESCENT DOSIMETRY.

No Description Available.

Date: January 1, 1972

Creator: Beetle, T.M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Recent B Physics Results from the Tevatron

We review recent B physics results from the CDF and D0 experiments in p{bar p} collisions at {radical}(s) = 1.96 TeV. Using a data sample of 1.4-6.0 fb{sup -1} collected by the CDF II detector we present searches for New Physics in B{sub s} sector and some competitive results with B-factories in the B/charm sector. In the first category we report the BR in B{sub s} J/{Psi} f{sub 0}(980) decays and the time-integrated mixing probability ({bar {chi}}) of B mesons. In the second category BR and A{… more

Date: July 1, 2011

Creator: Behari, Satyajit

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Anomalous diffusion and scaling in coupled stochastic processes

Inspired by problems in biochemical kinetics, we study statistical properties of an overdamped Langevin processes with the friction coefficient depending on the state of a similar, unobserved, process. Integrating out the latter, we derive the Pocker-Planck the friction coefficient of the first depends on the state of the second. Integrating out the latter, we derive the Focker-Planck equation for the probability distribution of the former. This has the fonn of diffusion equation with time-depe… more

Date: January 1, 2009

Creator: Bel, Golan & Nemenman, Ilya

Item Type: Article

Partner: UNT Libraries Government Documents Department