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Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
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1

MEASUREMENTS, ERRORS, AND NEGATIVE KINETIC ENERGY  

E-Print Network (OSTI)

An analysis of errors in measurement yields new insight into the penetration of quantum particles into classically forbidden regions. In addition to “physical” values, realistic measurements yield “unphysical ” values which, we show, can form a consistent pattern. An experiment to isolate a particle in a classically forbidden region obtains negative values for its kinetic energy. These values realize the concept of a weak value, discussed in previous works. 0

Yakir Aharonov; Sandu Popescu; Daniel Rohrlich; Lev Vaidman

1993-01-01T23:59:59.000Z

2

MEASURING LOCAL GRADIENT AND SKEW QUADRUPOLE ERRORS IN RHIC IRS.  

SciTech Connect

The measurement of local linear errors at RHIC interaction regions using an ''action and phase'' analysis of difference orbits has already been presented. This paper evaluates the accuracy of this technique using difference orbits that were taken when known gradient errors and skew quadrupole errors were intentionally introduced. It also presents action and phase analysis of simulated orbits when controlled errors are intentionally placed in a RHIC simulation model.

CARDONA,J.; PEGGS,S.; PILAT,R.; PTITSYN,V.

2004-07-05T23:59:59.000Z

3

Slope Error Measurement Tool for Solar Parabolic Trough Collectors: Preprint  

DOE Green Energy (OSTI)

The National Renewable Energy Laboratory (NREL) has developed an optical measurement tool for parabolic solar collectors that measures the combined errors due to absorber misalignment and reflector slope error. The combined absorber alignment and reflector slope errors are measured using a digital camera to photograph the reflected image of the absorber in the collector. Previous work using the image of the reflection of the absorber finds the reflector slope errors from the reflection of the absorber and an independent measurement of the absorber location. The accuracy of the reflector slope error measurement is thus dependent on the accuracy of the absorber location measurement. By measuring the combined reflector-absorber errors, the uncertainty in the absorber location measurement is eliminated. The related performance merit, the intercept factor, depends on the combined effects of the absorber alignment and reflector slope errors. Measuring the combined effect provides a simpler measurement and a more accurate input to the intercept factor estimate. The minimal equipment and setup required for this measurement technique make it ideal for field measurements.

Stynes, J. K.; Ihas, B.

2012-04-01T23:59:59.000Z

4

Radar System Errors in Polarization Diversity Measurements  

Science Conference Proceedings (OSTI)

The measurement capability of a polarization diversity radar is limited by several characteristics of the system and particularly by the performance of the antenna, which is characterized by the integrated cancellation ratio or integrated cross-...

James I. Metcalf; James S. Ussailis

1984-06-01T23:59:59.000Z

5

Sampling Errors in Flux Measurements of Slowly Depositing Pollutants  

Science Conference Proceedings (OSTI)

Sampling errors in vertical flux measurements obtained by eddy correlation methods are investigated by specifying a jointly normal–lognormal density distribution for the vertical velocity and scalar concentration. The probability density function ...

Edward E. O'Brien

1985-07-01T23:59:59.000Z

6

Air Temperature Measurement Errors in Naturally Ventilated Radiation Shields  

Science Conference Proceedings (OSTI)

Two sources of systematic errors are considered for estimating air temperature. The first source is ambiguity of the definition of the standardized measurement height over vegetated surfaces of varying heights. Without such a standardization, ...

Reina Nakamura; L. Mahrt

2005-07-01T23:59:59.000Z

7

Evaluate error sources and uncertainty in large scale measurement systems  

Science Conference Proceedings (OSTI)

Modern manufacturing technologies place increasingly higher demands on industrial measurement systems. Over the last decade there have been rapid developments in 3D measurement systems, with the primary requirement coming from industries such as automotives, ... Keywords: Best fit methods, Laser scanner, Measurement errors, Uncertainty

Qing Wang; Nick Zissler; Roger Holden

2013-02-01T23:59:59.000Z

8

Errors of Nonobservation  

U.S. Energy Information Administration (EIA) Indexed Site

Errors of Nonobservation Errors of Nonobservation Finally, several potential sources of nonsampling error and bias result from errors of nonobservation. The 1994 MECS represents, in terms of sampling coverage, the mail frame of the 1994 ASM or 98 percent of the manufacturing universe, which is consistent with the 1991 MECS. Unit Nonresponse Even though the MECS is a legislatively mandated survey and sampled establishments are given sufficient opportunity and time to respond, nonresponse occurs in the MECS and is accounted for in a nonresponse adjustment of sampling weights. Clearly, had these adjustments not been performed, the estimates produced from only the responding establishments would not have been representative of the target universe for the MECS. Such estimates would have been biased. Adjusting the sampling weights to

9

Measure of Diffusion Model Error for Thermal Radiation Transport  

E-Print Network (OSTI)

The diffusion approximation to the equation of transfer (Boltzmann transport equation) is usually applied to media where scattering dominates the interactions. Diffusion approximation helps in significant savings in terms of code complexity and computational time. However, this approximation often has significant error. Error due to the inherent nature of a physics model is called model error. Information about the model error associated with the diffusion approximation is clearly desirable. An indirect measure of model error is a quantity that is related in some way to the error but not equal to the error. In general, indirect measures of error are expected to be less costly than direct measures. Perhaps the most well-known indirect measure of the diffusion model error is the variable-Eddington tensor. This tensor provides a great deal of information about the angular dependence of the angular intensity solution, but it is not always simple to interpret. We define a new indirect measure of the diffusion model error called the diffusion model error source (DME source). When this DME source is added to the diffusion equation, the transport solution for the angular-integrated intensity is obtained. In contrast to the variable-Eddington tensor, our DME source is a scalar that is conceptually easy to interpret. In addition to defining the DME source analytically, we show how to generate this source numerically relative to the Sn radiative transfer equations with linear-discontinuous spatial discretization. This numerical source is computationally tested and shown to reproduce the Sn solution for a number of problems. Our radiative transfer model solves a coupled, time dependent, multi-frequency, 1-D slab equation and material heat transfer equation. We then use diffusion approximation to solve the same problem. The difference due to this approximation can be modelled by a “diffusion source”. The diffusion source is defined as an amount of inhomogeneous source that, when added to a diffusion calculation, gives a solution for the angle-integrated intensity that is equal to the transport solution.

Kumar, Akansha

2013-05-01T23:59:59.000Z

10

Measuring contextual fitness using error contexts extracted from the Wikipedia revision history  

Science Conference Proceedings (OSTI)

We evaluate measures of contextual fitness on the task of detecting real-word spelling errors. For that purpose, we extract naturally occurring errors and their contexts from the Wikipedia revision history. We show that such natural errors are better ...

Torsten Zesch

2012-04-01T23:59:59.000Z

11

Error in Measurements of Incoming Shortwave Radiation Made from Ships and Buoys  

Science Conference Proceedings (OSTI)

Errors in shortwave solar radiation measurements resulting from mean tils and rocking motions, as well as from the response time of the sensors, are determined experimentally. The magnitude of the mean tilt error can be large and lead to errors ...

M. A. MacWhorter; R. A. Weller

1991-02-01T23:59:59.000Z

12

Experts Recommend Measures to Reduce Human Error in ...  

Science Conference Proceedings (OSTI)

... 34 recommendations addressing the problems resulting from ... is understood that some human error is inevitable ... that openness about errors leads to ...

2012-02-21T23:59:59.000Z

13

Loaded Transmission Error Measurement System for Spur and Helical Gears.  

E-Print Network (OSTI)

??The majority of loaded static transmission error test stands developed in the past had little success generating accurate results versus analytical predictions for parallel-axis gearing.… (more)

Wright, Zachary Harrison

2009-01-01T23:59:59.000Z

14

A Displacement-Based Error Measure Applied in a Regional Ensemble Forecasting System  

Science Conference Proceedings (OSTI)

Errors in regional forecasts often take the form of phase errors, where a forecasted weather system is displaced in space or time. For such errors, a direct measure of the displacement is likely to be more valuable than traditional measures. A ...

Christian Keil; George C. Craig

2007-09-01T23:59:59.000Z

15

Out-of-Level Instruments: Errors in Hydrometeor Spectra and Precipitation Measurements  

Science Conference Proceedings (OSTI)

Meteorological instruments which are designed to measure the size spectra of hydrometeors such as hailstones or raindrops or instruments designed to measure cumulative precipitation such as raingages can produce errors if they are not installed ...

Ronald E. Rinehart

1983-08-01T23:59:59.000Z

16

Impact of the number of material measurement categories on measurement error  

DOE Green Energy (OSTI)

There is nearly always some mismatch between the physical properties of items containing nuclear material and standards used to calibrate the assay method. Physical properties include the density and heterogeneity of the item's nonnuclear material and the type of interfering species, such as hydrogen in the case of neutron counting. Some assay techniques are less sensitive to variation in physical properties than others and can be used to generate working standards. Provided that a reference assay method 1 (often calorimetry) is available that is well characterized (having negligible or known dependence on varying physical properties), we can assess the total measurement error of another method 2. In this paper we consider the impact of the number of measurement categories on the measurement error standard deviation of method 2. We assume that working standards (traceable to primary reference standards) are provided by the method 1 assay of actual facility items. Given the same number of working standards, we evaluate the tradeoff between using more working standards for each of a fewer number of categories versus using fewer standards in each of more categories. This leads to a method to determine a good allocation of working standards.

Burr, Tom; Hemphill, G. M. (Geralyn M.); Longmire, V. L. (Victoria L.); Smith, M. K. (Morag K.)

2002-01-01T23:59:59.000Z

17

Mitigating sampling error when measuring internet client IPv6 capabilities  

Science Conference Proceedings (OSTI)

Despite the predicted exhaustion of unallocated IPv4 addresses between 2012 and 2014, it remains unclear how many current clients can use its successor, IPv6, to access the Internet. We propose a refinement of previous measurement studies that mitigates ... Keywords: banner-ad-based measurement, ipv6 deployment

Sebastian Zander; Lachlan L.H. Andrew; Grenville Armitage; Geoff Huston; George Michaelson

2012-11-01T23:59:59.000Z

18

Pressure Measurements Using an Airborne Differential Absorption Lidar. Part I: Analysis of the Systematic Error Sources  

Science Conference Proceedings (OSTI)

Systematic error sources that require correction when making remote airborne measurements of the atmospheric pressure field in the lower troposphere, using an oxygen differential absorption lidar, are analyzed. A detailed analysis of this ...

Cyrille N. Flamant; Geary K. Schwemmer; C. Laurence Korb; Keith D. Evans; Stephen P. Palm

1999-05-01T23:59:59.000Z

19

Measuring the Ensemble Spread–Error Relationship with a Probabilistic Approach: Stochastic Ensemble Results  

Science Conference Proceedings (OSTI)

One widely accepted measure of the utility of ensemble prediction systems is the relationship between ensemble spread and deterministic forecast accuracy. Unfortunately, this relationship is often characterized by spread–error linear correlations,...

Eric P. Grimit; Clifford F. Mass

2007-01-01T23:59:59.000Z

20

Estimation of Wind-Induced Error of Rainfall Gauge Measurements Using a Numerical Simulation  

Science Conference Proceedings (OSTI)

A new method of estimating the wind-induced error of rainfall gauge measurements is presented. The method is based on a three-dimensional numerical simulation of the airflow around a precipitation gauge and subsequent computation of particle ...

Vladislav Nešpor; Boris Sevruk

1999-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

A Direct Error Measure for Affine Models of Nonlinear Algebraic Systems  

NLE Websites -- All DOE Office Websites (Extended Search)

A Direct Error Measure for Affine Models of Nonlinear Algebraic Systems A Direct Error Measure for Affine Models of Nonlinear Algebraic Systems Speaker(s): David Lorenzetti Date: June 2, 1999 - 12:00pm Location: Bldg. 90 The Newton-Raphson solution of a nonlinear system iterately linearizes the equations, then steps to the solution of the resulting affine model. When a step exceeds the predictive range of its model, the method can diverge. The traditional response -- aggregating the equations into a cost function, and applying a minimization method -- suppresses information about how each equation model performs. Direct error measures examine the equations individually, allowing finer control over step lengths. The seminar will develop one such measure through the geometry of simple one- and two-dimensional examples, then present results from a suite of larger

22

SYSTEMATIC CONTINUUM ERRORS IN THE Ly{alpha} FOREST AND THE MEASURED TEMPERATURE-DENSITY RELATION  

Science Conference Proceedings (OSTI)

Continuum fitting uncertainties are a major source of error in estimates of the temperature-density relation (usually parameterized as a power-law, T {proportional_to} {Delta}{sup {gamma}-1}) of the intergalactic medium through the flux probability distribution function (PDF) of the Ly{alpha} forest. Using a simple order-of-magnitude calculation, we show that few percent-level systematic errors in the placement of the quasar continuum due to, e.g., a uniform low-absorption Gunn-Peterson component could lead to errors in {gamma} of the order of unity. This is quantified further using a simple semi-analytic model of the Ly{alpha} forest flux PDF. We find that under(over)estimates in the continuum level can lead to a lower (higher) measured value of {gamma}. By fitting models to mock data realizations generated with current observational errors, we find that continuum errors can cause a systematic bias in the estimated temperature-density relation of ({delta}({gamma})) Almost-Equal-To -0.1, while the error is increased to {sigma}{sub {gamma}} Almost-Equal-To 0.2 compared to {sigma}{sub {gamma}} Almost-Equal-To 0.1 in the absence of continuum errors.

Lee, Khee-Gan, E-mail: lee@astro.princeton.edu [Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544 (United States)

2012-07-10T23:59:59.000Z

23

Statistical Error Decomposition of Regional-Scale Climatological Precipitation Estimates from the Tropical Rainfall Measuring Mission (TRMM)  

Science Conference Proceedings (OSTI)

Monthly rainfall estimates inferred from the NASA Tropical Rainfall Measuring Mission (TRMM) satellite contain errors due to discrete temporal sampling and remote spaceborne rain retrievals. This paper develops a regional-scale error model that ...

Brad L. Fisher

2007-06-01T23:59:59.000Z

24

Error Sources and Accuracy of Vertical Velocities Computed from Multiple-Doppler Radar Measurements in Deep Convective Storms  

Science Conference Proceedings (OSTI)

Actual data are used in one case to investigate the nature and source of vertical velocity errors resulting from analyses of multiple-Doppler radar measurements. Consistent with earlier analytical works, larger errors are found than would be ...

Stephan P. Nelson; Rodger A. Brown

1987-03-01T23:59:59.000Z

25

Errors in Wind Measurements Estimated by Five-Beam Phased Array Doppler Sodar  

Science Conference Proceedings (OSTI)

Estimation of the errors in sodar wind measurements using the phased array Doppler sodar operated under five-beam observation has been made. When compared with the sonic anemometer on the tower nearby, the variances or second-order moments of ...

Yoshiki Ito

1997-08-01T23:59:59.000Z

26

Influence of sky radiance measurement errors on inversion-retrieved aerosol properties  

SciTech Connect

Remote sensing of the atmospheric aerosol is a well-established technique that is currently used for routine monitoring of this atmospheric component, both from ground-based and satellite. The AERONET program, initiated in the 90's, is the most extended network and the data provided are currently used by a wide community of users for aerosol characterization, satellite and model validation and synergetic use with other instrumentation (lidar, in-situ, etc.). Aerosol properties are derived within the network from measurements made by ground-based Sun-sky scanning radiometers. Sky radiances are acquired in two geometries: almucantar and principal plane. Discrepancies in the products obtained following both geometries have been observed and the main aim of this work is to determine if they could be justified by measurement errors. Three systematic errors have been analyzed in order to quantify the effects on the inversion-derived aerosol properties: calibration, pointing accuracy and finite field of view. Simulations have shown that typical uncertainty in the analyzed quantities (5% in calibration, 0.2 Degree-Sign in pointing and 1.2 Degree-Sign field of view) yields to errors in the retrieved parameters that vary depending on the aerosol type and geometry. While calibration and pointing errors have relevant impact on the products, the finite field of view does not produce notable differences.

Torres, B.; Toledano, C.; Cachorro, V. E.; Bennouna, Y. S.; Fuertes, D.; Gonzalez, R.; Frutos, A. M. de [Atmospheric Optics Group (GOA), University of Valladolid, Valladolid (Spain); Berjon, A. J. [Izana Atmospheric Research Center, Meteorological State Agency of Spain (AEMET), Sta. Cruz de Tenerife (Spain); Dubovik, O.; Goloub, P.; Podvin, T.; Blarel, L. [Laboratory of Atmospheric Optics, Universite Lille 1, Villeneuve d'Ascq (France)

2013-05-10T23:59:59.000Z

27

Correction for dynamic bias error in transmission measurements of void fraction  

SciTech Connect

Dynamic bias errors occur in transmission measurements, such as X-ray, gamma, or neutron radiography or tomography. This is observed when the properties of the object are not stationary in time and its average properties are assessed. The nonlinear measurement response to changes in transmission within the time scale of the measurement implies a bias, which can be difficult to correct for. A typical example is the tomographic or radiographic mapping of void content in dynamic two-phase flow systems. In this work, the dynamic bias error is described and a method to make a first-order correction is derived. A prerequisite for this method is variance estimates of the system dynamics, which can be obtained using high-speed, time-resolved data acquisition. However, in the absence of such acquisition, a priori knowledge might be used to substitute the time resolved data. Using synthetic data, a void fraction measurement case study has been simulated to demonstrate the performance of the suggested method. The transmission length of the radiation in the object under study and the type of fluctuation of the void fraction have been varied. Significant decreases in the dynamic bias error were achieved to the expense of marginal decreases in precision.

Andersson, P.; Sunden, E. Andersson; Svaerd, S. Jacobsson; Sjoestrand, H. [Department of Physics and Astronomy, Division of Applied Nuclear Physics, Uppsala University, Laegerhyddsgatan 1, 751 20 Uppsala (Sweden)

2012-12-15T23:59:59.000Z

28

The effect of measurement error on the dose-response curve  

Science Conference Proceedings (OSTI)

In epidemiological studies for an environmental risk assessment, doses are often observed with errors. However, they have received little attention in data analysis. This paper studies the effect of measurement errors on the observed dose-response curve. Under the assumptions of the monotone likelihood ratio on errors and a monotone increasing dose-response curve, it is verified that the slope of the observed dose-response curve is likely to be gentler than the true one. The observed variance of responses are not so homogeneous as to be expected under models without errors. The estimation of parameters in a hockey-stick type dose-response curve with a threshold is considered on line of the maximum likelihood method for a functional relationship model. Numerical examples adaptable to the data in a 1986 study of the effect of air pollution that was conducted in Japan are also presented. The proposed model is proved to be suitable to the data in the example cited in this paper.

Yoshimura, I. (Nagoya Univ. (Japan))

1990-07-01T23:59:59.000Z

29

Introducing ROC curves as error measure functions: a new approach to train ANN-based biomedical data classifiers  

Science Conference Proceedings (OSTI)

This paper explores the usage of the area (Az) under the Receiver Operating Characteristic (ROC) curve as error measure to guide the training process to build machine learning ANN-based classifiers for biomedical data analysis. Error measures (like root ... Keywords: ROC curves, artificial neural networks, biomedical data, machine learning classifiers

Raúl Ramos-Pollán; Miguel Ángel Guevara-López; Eugénio Oliveira

2010-11-01T23:59:59.000Z

30

Distortion Representation of Forecast Errors  

Science Conference Proceedings (OSTI)

Forecast error is decomposed into three components, termed displacement error, amplitude error, mid residual error, respectively. Displacement error measures how much of the forecast error can be accounted for by moving the forecast to best fit ...

Ross N. Hoffman; Zheng Liu; Jean-Francois Louis; Christopher Grassoti

1995-09-01T23:59:59.000Z

31

Identification of errors in the electron density measurements of a tangential interferometer/polarimeter system during a tokamak discharge  

Science Conference Proceedings (OSTI)

A new method for the comparative verification of electron density measurements obtained with a tangential interferometer and a polarimeter during a discharge is proposed. The possible errors associated with the interferometer and polarimeter are classified by the time required for their identification. Based on the characteristics of the errors, the fringe shift error of the interferometer and the low-frequency noise of the polarimeter were identified and corrected for the JT-60U tangential interferometer/polarimeter system.

Arakawa, H.; Kawano, Y.; Itami, K. [Japan Atomic Energy Agency, 801-1, Mukoyama, Naka 311-0193 (Japan)

2012-10-15T23:59:59.000Z

32

A New Method for the Measurement of the Site Errors of a Lightning Direction-Finder: Description and First Results  

Science Conference Proceedings (OSTI)

One of the major limitations in the use of magnetic direction-finders for locating lightning is the presence of systematic angle errors that are due to the local antenna site. An attempt was made to measure this systematic error, by using a ...

Th Schütte; E. Pisler; S. Israelsson

1987-06-01T23:59:59.000Z

33

Errors associated with particulate matter measurements on rural sources: appropriate basis for regulating cotton gins  

E-Print Network (OSTI)

Agricultural operations across the United States are encountering difficulties complying with current air pollution regulations for particulate matter (PM). PM is currently regulated in terms of particle diameters less than or equal to a nominal 10 ?m (PM10); however, current legislation is underway to regulate PM with diameters less than or equal to a nominal 2.5 ?m (PM2.5). The goals of this research were to determine the biases and uncertainties associated with current PM10 and PM2.5 sampling methods and to determine the extent to which these errors may impact the determination of cotton gin emission factors. Ideally, PM samplers would produce an accurate measure of the pollutant indicator; for instance, a PM10 sampler would produce an accurate measure of PM less than or equal to 10 ?m. However, samplers are not perfect and errors are introduced because of the established tolerances associated with sampler performance characteristics and the interaction of particle size and sampler performance characteristics. Results of this research indicated that a source emitting PM characterized by a mass median diameter (MMD) of 20 ?m and a geometric standard deviation (GSD) of 1.5 could be forced to comply with a 3.2 and 14 times more stringent regulation of PM10 and PM2.5, respectively, than a source emitting PM characterized by a MMD of 10 ?m and a GSD of 1.5. These estimates are based on both sources emitting the same concentrations of true PM or concentrations corresponding to the particle diameters less than the size of interest. Various methods were used to estimate the true PM10 and PM2.5 emission factors associated with cotton gin exhausts and the extent to which the sampler errors impacted the PM regulation. Results from this research indicated that current cotton gin emission factors could be over-estimated by about 40%. This over-estimation is a consequence of the relatively large PM associated with cotton gin exhausts. These PM sampling errors are contributing to the misappropriation of source emissions in State Implementation Plans, essentially forcing Air Pollution Regulatory Agencies to require additional controls on sources that may be incorrectly classified has high emitters.

Buser, Michael Dean

2003-05-01T23:59:59.000Z

34

Error Estimates for Passive Satellite Measurement of Surface Pressure Using Absorption in the A Band of Oxygen  

Science Conference Proceedings (OSTI)

This paper investigates the feasibility of satellite remote sensing of surface pressure using radiometric measurements in the oxygen A band. It is shown out the primary sources of error are the uncertainties in the temperature profile, the ...

R. M. Mitchell; D. M. O'Brien

1987-08-01T23:59:59.000Z

35

Corrections of Humidity Measurement Errors from the Vaisala RS80 Radiosonde—Application to TOGA COARE Data  

Science Conference Proceedings (OSTI)

A series of laboratory tests have been conducted on several different batches of Vaisala RS80 radiosondes to understand and develop methods to correct six humidity measurement errors, including chemical contamination, temperature dependence, ...

Junhong Wang; Harold L. Cole; David J. Carlson; Erik R. Miller; Kathryn Beierle; Ari Paukkunen; Tapani K. Laine

2002-07-01T23:59:59.000Z

36

Error Structure of Multiparameter Radar and Surface Measurements of Rainfall. Part III: Specific Differential Phase  

Science Conference Proceedings (OSTI)

Parts I and II of this three part paper dealt with the error structure of differential reflectivity and X-band specific attenuation in rainfall as estimated by radar and surface disdrometers. In this Part III paper we focus on the error structure ...

V. Chandrasekar; V. N. Bringi; N. Balakrishnan; D. S. Zrni?

1990-10-01T23:59:59.000Z

37

Leakage and paralysis in ancilla-assisted qubit measurement: Consequences for topological error correction in superconducting architectures  

E-Print Network (OSTI)

Although topological error-correcting codes offer a promising paradigm for fault-tolerant quantum computation, their robustness in the presence of leakage to non-computational states is unclear. Here we explore the signature and consequences of leakage errors on ancilla-assisted Pauli operator measurement in superconducting devices. We consider a realistic coupled-qutrit model and simulate the repeated measurement of a single Z operator. Typically, a data-qubit leakage event manifests itself by producing a "noisy" ancilla qubit that randomly reads 0 or 1 from cycle to cycle. Although the measurement operation is compromised, the presence of the leakage event is apparent and detectable. However, there is also the possibility of a less typical but more dangerous type of leakage event, where the ancilla becomes paralyzed, rendering it oblivious to data-qubit errors for many consecutive measurement cycles and compromising the fault-tolerance. Certain dynamical phases associated with the entangling gate determine which type of leakage event will occur in practice. Leakage errors occur in most qubit realizations and our model and results are relevant for many stabilizer-based error correction protocols.

Joydip Ghosh; Austin G. Fowler; John M. Martinis; Michael R. Geller

2013-06-04T23:59:59.000Z

38

PROCEDURE Market Manual 3: Metering Part 3.4: Measurement Error Correction  

E-Print Network (OSTI)

This document provides guidance to metering service providers on how to calculate and submit Measurement Error Correction (MEC) to the IESO. Public Disclaimer The posting of documents on this Web site is done for the convenience of market participants and other interested visitors to the IESO Web site. Please be advised that, while the IESO attempts to have all posted documents conform to the original, changes can result from the original, including changes resulting from the programs used to format the documents for posting on the Web site as well as from the programs used by the viewer to download and read the documents. The IESO makes no representation or warranty, express or implied, that the documents on this Web site are exact reproductions of the original documents listed. In addition, the documents and information posted on this Web site are subject to change. The IESO may revise, withdraw or make final these materials at any time at its sole discretion without further notice. It is solely your responsibility to ensure that you are using up-to-date documents and information. This market manual may contain a summary of a particular market rule. Where provided, the

unknown authors

2000-01-01T23:59:59.000Z

39

Market Manual 3: Metering Part 3.4: Measurement Error Correction  

E-Print Network (OSTI)

This document provides guidance to metering service providers on how to calculate and submit Measurement Error Correction (MEC) to the IESO. Public Disclaimer The posting of documents on this Web site is done for the convenience of market participants and other interested visitors to the IESO Web site. Please be advised that, while the IESO attempts to have all posted documents conform to the original, changes can result from the original, including changes resulting from the programs used to format the documents for posting on the Web site as well as from the programs used by the viewer to download and read the documents. The IESO makes no representation or warranty, express or implied, that the documents on this Web site are exact reproductions of the original documents listed. In addition, the documents and information posted on this Web site are subject to change. The IESO may revise, withdraw or make final these materials at any time at its sole discretion without further notice. It is solely your responsibility to ensure that you are using up-to-date documents and information. This market manual may contain a summary of a particular market rule. Where provided, the

unknown authors

2000-01-01T23:59:59.000Z

40

Radiative Heating Errors in Naturally Ventilated Air Temperature Measurements Made from Buoys*  

Science Conference Proceedings (OSTI)

Solar radiative heating errors in buoy-mounted, naturally ventilated air temperature sensors are examined. Data from sensors with multiplate radiation shields and collocated, fan-aspirated air temperature sensors from three buoy deployments ...

Steven P. Anderson; Mark F. Baumgartner

1998-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

The Reduction of Errors Caused by Bright Bands in Quantitative Rainfall Measurements Made Using Radar  

Science Conference Proceedings (OSTI)

The presence of melting snow in a radar beam produces a highly enhanced return which can lead to large errors in estimates of areal surface rainfall made with radar. This paper describes an algorithm for use in real time to detect the presence of ...

Catherine J. Smith

1986-03-01T23:59:59.000Z

42

INVESTIGATION OF THE ERRORS IN SLOAN DIGITAL SKY SURVEY PROPER-MOTION MEASUREMENTS USING SAMPLES OF QUASARS  

SciTech Connect

We investigate in detail the probability distribution function (pdf) of the proper-motion measurement errors in the SDSS+USNO-B proper-motion catalog of Munn et al. using clean quasar samples. The pdf of the errors is well represented by a Gaussian core with extended wings, plus a very small fraction (<0.1%) of 'outliers'. We find that while formally the pdf could be well fit by a five-parameter fitting function, for many purposes it is also adequate to represent the pdf with a one-parameter approximation to this function. We apply this pdf to the calculation of the confidence intervals on the true proper motion for an SDSS+USNO-B proper-motion measurement, and discuss several scientific applications of the SDSS proper-motion catalog. Our results have various applications in studies of the galactic structure and stellar kinematics. Specifically, they are crucial for searching hyper-velocity stars in the Galaxy.

Dong Ruobing; Gunn, James; Knapp, Gillian [Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544 (United States); Rockosi, Constance [UCO/Lick Observatory, Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States); Blanton, Michael, E-mail: rdong@astro.princeton.edu [Center for Cosmology and Particle Physics, Department of Physics, New York University, 4 Washington Place, New York, NY 10003 (United States)

2011-10-15T23:59:59.000Z

43

The Measure of Human Error: Direct and Indirect Performance Shaping Factors  

Science Conference Proceedings (OSTI)

The goal of performance shaping factors (PSFs) is to provide measures to account for human performance. PSFs fall into two categories—direct and indirect measures of human performance. While some PSFs such as “time to complete a task” are directly measurable, other PSFs, such as “fitness for duty,” can only be measured indirectly through other measures and PSFs, such as through fatigue measures. This paper explores the role of direct and indirect measures in human reliability analysis (HRA) and the implications that measurement theory has on analyses and applications using PSFs. The paper concludes with suggestions for maximizing the reliability and validity of PSFs.

Ronald L. Boring; Candice D. Griffith; Jeffrey C. Joe

2007-08-01T23:59:59.000Z

44

Errors for Space-Based Doppler Lidar Wind Measurements: Definition, Performance, and Verification  

Science Conference Proceedings (OSTI)

Verification of space-based wind measurements will be difficult because of the random variations of the atmospheric velocity field over the measurement volume. The definition of accuracy requires a definition of “truth.” For this work, truth is ...

Rod Frehlich

2001-11-01T23:59:59.000Z

45

Scopes and Challenges of Dual-Doppler Lidar Wind Measurements—An Error Analysis  

Science Conference Proceedings (OSTI)

Pulsed Doppler lidars are powerful tools for long-range high-resolution measurements of radial wind velocities. With the development of commercial Doppler lidars and the reduction of acquisition costs, dual-Doppler lidar systems will be become ...

Christina Stawiarski; Katja Träumner; Christoph Knigge; Ronald Calhoun

46

Solar and Thermal Radiation Errors on Upper-Air Radiosonde Temperature Measurements  

Science Conference Proceedings (OSTI)

Atmospheric temperature and humidity profiles are important for weather prediction, but climate change has increased the interest in upper-air observations asking for very high quality reference measurements. Here we show an experimental approach ...

R. Philipona; A. Kräuchi; G. Romanens; G. Levrat; P. Ruppert; E. Brocard; P. Jeannet; D. Ruffieux; B. Calpini

47

Solar and Thermal Radiation Errors on Upper-Air Radiosonde Temperature Measurements  

Science Conference Proceedings (OSTI)

Atmospheric temperature and humidity profiles are important for weather prediction, but climate change has increased the interest in upper-air observations asking for very high-quality reference measurements. This paper discusses an experimental ...

R. Philipona; A. Kräuchi; G. Romanens; G. Levrat; P. Ruppert; E. Brocard; P. Jeannet; D. Ruffieux; B. Calpini

2013-10-01T23:59:59.000Z

48

Scopes and Challenges of Dual-Doppler Lidar Wind Measurements—An Error Analysis  

Science Conference Proceedings (OSTI)

Pulsed Doppler lidars are powerful tools for long-range, high-resolution measurements of radial wind velocities. With the development of commercial Doppler lidars and the reduction of acquisition costs, dual-Doppler lidar systems will be become ...

Christina Stawiarski; Katja Träumner; Christoph Knigge; Ronald Calhoun

2013-09-01T23:59:59.000Z

49

Errors in the Measurement of Turbulence Upstream of an Axisymmetric Body  

Science Conference Proceedings (OSTI)

We use a Taylor series expansion technique to calculate the effects of mean-flow distortion on turbulence measurements ahead of an axisymmetric body. The approach is valid when the integral scale of the turbulence is large compared to the maximum ...

John C. Wyngaard; Larry Rockwell; Carl A. Friehe

1985-12-01T23:59:59.000Z

50

Measurement Error in Progress Monitoring Data: Comparing Methods Necessary for High-Stakes Decisions  

E-Print Network (OSTI)

Support for the use of progress monitoring results for high-stakes decisions is emerging in the literature, but few studies support the reliability of the measures for this level of decision-making. What little research exists is limited to oral reading fluency measures, and their reliability for progress monitoring (PM) is not supported. This dissertation explored methods rarely applied in the literature for summarizing and analyzing progress monitoring results for medium- to high-stakes decisions. The study was conducted using extant data from 92 "low performing" third graders who were progress monitored using mathematics concept and application measures. The results for the participants in this study identified 1) the number of weeks needed to reliably assess growth on the measure; 2) if slopes differed when results were analyzed with parametric or nonparametric analyses; 3) the reliability of growth; and 4) the extent to which the group did or did not meet parametric assumptions inherent in the ordinary least square regression model. The results indicate reliable growth from static scores can be obtained in as few as 10 weeks of progress monitoring. It was also found that within this dataset, growth through parametric and nonparametric analyses was similar. These findings are limited to the dataset analyzed in this study but provide promising methods not widely known among practitioners and rarely applied in the PM literature.

Bruhl, Susan

2012-05-01T23:59:59.000Z

51

Sampling Errors in Rawinsonde-Array Budgets  

Science Conference Proceedings (OSTI)

Rawinsonde data used for sounding-array budget computations have random errors, both instrumental errors and errors of representativeness (here called sampling errors). The latter are associated with the fact that radiosondes do not measure large-...

Brian E. Mapes; Paul E. Ciesielski; Richard H. Johnson

2003-11-01T23:59:59.000Z

52

Sources of Errors in Rainfall Measurements by Polarimetric Radar: Variability of Drop Size Distributions, Observational Noise, and Variation of Relationships between R and Polarimetric Parameters  

Science Conference Proceedings (OSTI)

Using a set of long-term disdrometric data and of actual radar measurements from the McGill S-band operational polarimetric radar, several sources of errors in rain measurement with polarimetric radar are explored in order to investigate their ...

Gyu Won Lee

2006-08-01T23:59:59.000Z

53

Correction of Drop Shape-Induced Errors on Rain Rates Derived from Radar-Measured Doppler Spectra at Vertical Incidence  

Science Conference Proceedings (OSTI)

The shape of larger raindrops shows a deviation from spheres. This leads to a radar backscatter cross section different from the Rayleigh cross section. The drop shape-induced error for deducing rain rates is calculated. The resulting correction ...

Dirk Klugmann; Carolin Richter

1995-06-01T23:59:59.000Z

54

EIA - Sorry! Unexpected Error  

Annual Energy Outlook 2012 (EIA)

Cold Fusion Error Unexpected Error Sorry An error was encountered. This error could be due to scheduled maintenance. Information about the error has been routed to the appropriate...

55

EIA - Sorry! Unexpected Error  

U.S. Energy Information Administration (EIA)

Home > Cold Fusion Error: Unexpected Error Sorry! An error was encountered. This error could be due to scheduled maintenance. Information about the error has ...

56

EIA - Sorry! Unexpected Error  

Annual Energy Outlook 2012 (EIA)

Home > Cold Fusion Error Unexpected Error Sorry An error was encountered. This error could be due to scheduled maintenance. Information about the error has been routed to the...

57

Transparent window size study of the water beam assisted form error in-process optical measurement method.  

E-Print Network (OSTI)

??xxxii, 242 p. : ill. ; 30 cm HKUST Call Number: Thesis MECH 2009 ZhangY In precision machining, it is desirable to measure workpiece form… (more)

Zhang, Yunfei

2009-01-01T23:59:59.000Z

58

In Situ Validation of a Correction for Time-Lag and Bias Errors in Vaisala RS80-H Radiosonde Humidity Measurements  

NLE Websites -- All DOE Office Websites (Extended Search)

In Situ Validation of a Correction for Time-Lag and In Situ Validation of a Correction for Time-Lag and Bias Errors in Vaisala RS80-H Radiosonde Humidity Measurements L. M. Miloshevich National Center for Atmospheric Research Boulder, Colorado H. Vömel and S. J. Oltmans National Oceanic and Atmospheric Administration Boulder, Colorado A. Paukkunen Vaisala Oy Helsinki, Finland Introduction Radiosonde relative humidity (RH) measurements are fundamentally important to Atmospheric Radiation Measurement (ARM) Program goals because they are used in a wide variety of both operational and research applications, including initialization of numerical models and evaluation of model results, validation of remote-sensor water vapor retrievals, construction of water vapor climatologies and studies of climate trends, parameterization of cloud processes, and as input to

59

Use of Distance-measuring Equipment (DME) for Correcting Errors in Position, Velocity, and Wind Measurements from Aircraft Inertial Navigation Systems  

Science Conference Proceedings (OSTI)

Aircraft distance-measuring-equipment (DME) data are used to update position, velocity, and wind measurements from inertial navigation systems (INS) measurements. Data from conventional single-channel DME sets, suitably calibrated, are shown to ...

Alfred R. Rodi; James C. Fankhauser; Robin L. Vaughan

1991-12-01T23:59:59.000Z

60

Machine Translation Errors: English and Iraqi Arabic  

Science Conference Proceedings (OSTI)

Errors in machine translations of English-Iraqi Arabic dialogues were analyzed using the methods developed for the Human Translation Error Rate measure (HTER). Human annotations were used to refine the Translation Error Rate (TER) annotations. The analyses ... Keywords: Arabic, English, error analysis, evaluation, statistical machine translation

S. Condon; D. Parvaz; J. Aberdeen; C. Doran; A. Freeman; M. Awad

2011-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Human Error in Airway Facilities  

E-Print Network (OSTI)

This report examines human errors in Airway Facilities (AF) with the intent of preventing these errors from being passed on to the new Operations Control Centers. To effectively manage errors, they first have to be identified. Human factors engineers researched human error literature, analyzed human errors recorded in AF databases, and conducted structured interviews with AF representatives. This study enabled them to categorize the types of human errors, identify potential causal factors, and recommend strategies for their mitigation. The results provide preventative measures that designers, developers, and users can take to reduce human error. 17. Key Words Human Error Error Mitigation Operations Control Centers Error Mitigation Strategies 18. Distribution Statement This document is available to the public through the National Technical Information Service, Springfield, Virginia, 22161. 19. Security Classif. (of this report) 20. Security Classif. (of this page) 21. No. of Pages 23 22. Price Form DOT F 1700.7 (8-72) Reproduction of completed page authorized iii ACKNOWLEDGMENTS This research was accomplished under the sponsorship of the Office of Chief Scientist for Human Factors, AAR-100. The research team greatly appreciates the support supplied by Beverly Clark of AOP-30 and our subject matter expert, Kermit Grayson of Grayson Consulting. We also wish to extend our thanks to the people interviewed at the facilities who gave their valuable time in helping us to achieve the goals of our project. iv v Table of Contents Page Acknowledgments..........................................................................................................................iii Executive Summary......................................................................................

Vicki Ahlstrom; Vicki Ahlstrom Act; Donald G. Hartman

2001-01-01T23:59:59.000Z

62

Firewall Configuration Errors Revisited  

E-Print Network (OSTI)

The first quantitative evaluation of the quality of corporate firewall configurations appeared in 2004, based on Check Point FireWall-1 rule-sets. In general that survey indicated that corporate firewalls were often enforcing poorly written rule-sets, containing many mistakes. The goal of this work is to revisit the first survey. The current study is much larger. Moreover, for the first time, the study includes configurations from two major vendors. The study also introduce a novel "Firewall Complexity" (FC) measure, that applies to both types of firewalls. The findings of the current study indeed validate the 2004 study's main observations: firewalls are (still) poorly configured, and a rule-set's complexity is (still) positively correlated with the number of detected risk items. Thus we can conclude that, for well-configured firewalls, ``small is (still) beautiful''. However, unlike the 2004 study, we see no significant indication that later software versions have fewer errors (for both vendors).

Wool, Avishai

2009-01-01T23:59:59.000Z

63

Flux Sampling Errors for Aircraft and Towers  

Science Conference Proceedings (OSTI)

Various errors and influences leading to differences between tower- and aircraft-measured fluxes are surveyed. This survey is motivated by reports in the literature that aircraft fluxes are sometimes smaller than tower-measured fluxes. Both tower ...

L. Mahrt

1998-04-01T23:59:59.000Z

64

Error detection method  

DOE Patents (OSTI)

An apparatus, program product, and method that run an algorithm on a hardware based processor, generate a hardware error as a result of running the algorithm, generate an algorithm output for the algorithm, compare the algorithm output to another output for the algorithm, and detect the hardware error from the comparison. The algorithm is designed to cause the hardware based processor to heat to a degree that increases the likelihood of hardware errors to manifest, and the hardware error is observable in the algorithm output. As such, electronic components may be sufficiently heated and/or sufficiently stressed to create better conditions for generating hardware errors, and the output of the algorithm may be compared at the end of the run to detect a hardware error that occurred anywhere during the run that may otherwise not be detected by traditional methodologies (e.g., due to cooling, insufficient heat and/or stress, etc.).

Olson, Eric J.

2013-06-11T23:59:59.000Z

65

Human Error Reduction  

Science Conference Proceedings (OSTI)

Reducing human error is recognized in the power-generation industry as a key factor in reducing safety-related events as well as improving asset availability. Achieving a sustainable culture change that leads to human error reduction in plant operations and maintenance remains a significant challenge to the industry. This report presents a behavior-based approach to human performance improvement and error reduction. The report explains fundamental elements of culture change and describes proven practices...

2010-12-23T23:59:59.000Z

66

Video Signal Error Concealment  

Science Conference Proceedings (OSTI)

... the video quality in packet loss transmission environments: error ... along the direction of each detected straight line. The lines are used to divide the ...

2011-03-29T23:59:59.000Z

67

Density estimation for data with rounding errors  

Science Conference Proceedings (OSTI)

Rounding of data is common in practice. The problem of estimating the underlying density function based on data with rounding errors is addressed. A parametric maximum likelihood estimator and a nonparametric bootstrap kernel density estimator are proposed. ... Keywords: Bootstrapping, Deconvolution density estimation, Fast Fourier transformation, Kernel density estimation, Measurement error

B. Wang, W. Wertelecki

2013-09-01T23:59:59.000Z

68

Automatic detection of dimension errors in spreadsheets  

Science Conference Proceedings (OSTI)

We present a reasoning system for inferring dimension information in spreadsheets. This system can be used to check the consistency of spreadsheet formulas and thus is able to detect errors in spreadsheets. Our approach is based on three static analysis ... Keywords: Dimension, Error detection, Inference rule, Spreadsheet, Static analysis, Unit of measurement

Chris Chambers; Martin Erwig

2009-08-01T23:59:59.000Z

69

Nebular Abundance Errors  

E-Print Network (OSTI)

The errors inherent to the use of the standard "ionization correction factor" ("i_CF") method of calculating nebular conditions and relative abundances of H, He, N, O, Ne, S, and Ar in emission line nebulae have been investigated under conditions typical for planetary nebulae. The photoionization code CLOUDY was used to construct a series of model nebulae with properties spanning the range typical of PNe. Its radial "profiles" of bright, frequently observed optical emission lines were then summed over a variety of "apertures" to generate sets of emission line measurements. These resulting line ratios were processed using the i_CF method to "derive" nebular conditions and abundances. We find that for lines which are summed over the entire nebula the i_CF-derived abundances differ from the input abundances by less than 5% for He and O up to 25% or more for Ne, S, and Ar. For resolved observations, however, the discrepancies are often much larger and are systematically variable with radius. This effect is especially pronounced in low-ionization zones where nitrogen and oxygen are neutral or once-ionized such as in FLIERs, ansae and ionization fronts. We argue that the reports of stellar-enriched N in the FLIERs of several PNe are probably specious.

J. Alexander; B. Balick

1997-04-30T23:59:59.000Z

70

Rainfall Measurement Error by WSR-88D Radars due to Variations in Z–R Law Parameters and the Radar Constant  

Science Conference Proceedings (OSTI)

An investigation is made of the extent to which variations in Z–R (reflectivity factor–rainfall rate) relations can explain the systematically large offsets of radar-measured rainfall from rain gauge measurements as observed with some National ...

C. W. Ulbrich; L. G. Lee

1999-08-01T23:59:59.000Z

71

Errors Caused by Long-Term Drifts of Magnetron Frequencies for Refractivity Measurement with a Radar: Theoretical Formulation and Initial Validation  

Science Conference Proceedings (OSTI)

Refractivity measurements in the boundary layer by precipitation radar could be useful for convection prediction. Until now such measurements have only been performed by coherent radars, but European weather radars are mostly equipped with ...

Jacques Parent du Chatelet; Chiraz Boudjabi; Lucas Besson; Olivier Caumont

2012-10-01T23:59:59.000Z

72

Sources of Error  

Science Conference Proceedings (OSTI)

...Sources of error in damage tolerance analysis can be classified as: Uncertainty and assumptions in data input Uncertainty due to assumptions about flaws Interpretations of, and assumptions in, stress history Inaccuracies in stress intensity Computer...

73

QuarkNet Workshop: Beyond Human Error  

NLE Websites -- All DOE Office Websites (Extended Search)

Human Error Human Error QuarkNet Workshop for High School Science Teachers 8:30 am to 4:00 pm, August 1 -3, 2012 at Fermi National Accelerator Laboratory This was a three-day workshop for high school science teachers. Measurement and error are key ingredients for all science applications. Both align with the Next Generation Science Standards, but many high school students struggle to understand the importance of error analysis and prevention. Over the three days we examined multiple experiments going on at Fermilab and discussed the ways that scientists take measurements and reduce error on these projects. Participants met and worked with scientists from Fermilab and University of Chicago to look at how error analysis takes place at Fermilab and bridged those ideas into high school classes. Teachers discussed lesson plans available at Fermilab and their own methods of teaching error analysis. Additionally, participants heard from high school students who participated in summer research as they presented their findings and linked students' learning back to the teachers' understanding of error recognition and analysis.

74

Error analysis in wind turbine field testing  

DOE Green Energy (OSTI)

In wind turbine field testing, one of the most important issues is understanding and accounting for data errors. Extended dynamic testing of wind turbines requires a thorough uncertainty analysis and a regimen of quality assurance steps in order to preserve accuracy. Test objectives need to be identified to determine the accuracy requirements of any data measurement, collection, and analysis process. Frequently, the uncertainty analysis reveals that the major sources of error can be allowed for with careful calibration and signal drift tracking procedures. This paper offers a basis for the discussion and development of a repeatable and accurate process to track errors and account for them in data processing.

McNiff, B [McNiff Light Industries, Carlisle, MA (United States); Simms, D [National Renewable Energy Lab., Golden, CO (United States)

1994-08-01T23:59:59.000Z

75

Modelling non-linear exposure-disease relationships in a large individual participant meta-analysis allowing for the effects of exposure measurement error  

E-Print Network (OSTI)

of exposures whether it be the measure- ment of biological exposures such as serum creatinine [27], or blood glucose [28]; environmen- tal exposures such as radon [29] or air pollution [30]; dietary exposures such as energy intake [31] or alcohol consumption... cause of death in almost all countries in the world. CHD caused approximately 1 out of every 6 deaths in the United States in 2006; an average of 1 death every 38 seconds [4]. In the United Kingdom cardiovascular disease is the main cause of mortality...

Strawbridge, Alexander Daniel

2012-10-09T23:59:59.000Z

76

Modular error embedding  

DOE Patents (OSTI)

A method of embedding auxiliary information into the digital representation of host data containing noise in the low-order bits. The method applies to digital data representing analog signals, for example digital images. The method reduces the error introduced by other methods that replace the low-order bits with auxiliary information. By a substantially reverse process, the embedded auxiliary data can be retrieved easily by an authorized user through use of a digital key. The modular error embedding method includes a process to permute the order in which the host data values are processed. The method doubles the amount of auxiliary information that can be added to host data values, in comparison with bit-replacement methods for high bit-rate coding. The invention preserves human perception of the meaning and content of the host data, permitting the addition of auxiliary data in the amount of 50% or greater of the original host data.

Sandford, II, Maxwell T. (Los Alamos, NM); Handel, Theodore G. (Los Alamos, NM); Ettinger, J. Mark (Los Alamos, NM)

1999-01-01T23:59:59.000Z

77

Tone Dependent Color Error Diffusion  

E-Print Network (OSTI)

Conventional grayscale error di#usion halftoning produces worms and other objectionable artifacts. Tone dependent error di#usion #Li and Allebach# reduces these artifacts by controlling the di#usion of quantization errors based on the input graylevel. Li and Allebach design error #lter weights and thresholds for each #input# graylevel optimized based on a human visual system #HVS# model. This paper extends tone dependent error di#usion to color. In color error di#usion, what color to render becomes a major concern in addition to #nding optimal dot patterns. We present a visually optimum design approach for input level #tone# dependent error #lters #for each color plane#. The resulting halftones reduce traditional error di#usion artifacts and achieve greater accuracy in color rendition. 1.

Vishal Monga; Brian L. Evans

2004-01-01T23:59:59.000Z

78

Sampling Errors in Seasonal Forecasting  

Science Conference Proceedings (OSTI)

The limited numbers of start dates and ensemble sizes in seasonal forecasts lead to sampling errors in predictions. Defining the magnitude of these sampling errors would be useful for end users as well as informing decisions on resource ...

Stephen Cusack; Alberto Arribas

2009-03-01T23:59:59.000Z

79

Modeling Human Error For Experimentation, Training, And Error-Tolerant Design  

E-Print Network (OSTI)

Human error in computer systems has been blamed for many military and civilian catastrophes resulting in mission failure and loss of money and lives. However, the root cause of such failures often lies in the system’s design. A central theme in designing for human-error tolerance is to build a multi-layered defense. Creating such a robust system requires that designers effectively manage several aspects of erroneous system usage: prevention, reduction, detection, identification, recovery, and mitigation. These also correspond to discrete stages before and after error occurrence where different defensive measures can be taken. Human error models can be used to better understand these stages, the underlying cognitive mechanisms responsible for errors, and ultimately how to design systems and training to reduce the effects of inherent human limitations. This paper presents a general framework for human error recovery based on five key stages of erroneous performance: the commission of an error, its detection, identification, and correction, and resumption of the original task. These stages constitute the main components of a state model that characterizes human performance, and allows designers and trainers comprehensively address the most important aspects of error-tolerant design. Furthermore, these performance stages can be modeled computationally, to varying degrees, using standard information processing architectures. This work also demonstrates the effectiveness of a technique using GOMS models to design systems to

Scott D. Wood; David E. Kieras

2002-01-01T23:59:59.000Z

80

Pocket Guide: Preventing Switching Errors  

Science Conference Proceedings (OSTI)

There are many conditions that are frequently identified as factors contributing to, if not directly causing, accidents and other unwanted events. These have come to be called "error-likely conditions." In 2010, the Electric Power Research Institute (EPRI) published report 1020018, Error-Likely Situations in Power Switching. That report was the first large-scale effort to fill the knowledge gap in the area of error-likely situations in power switching, and it identified over 100 potentially error-likely ...

2011-12-12T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Error matrix in quantum process tomography  

E-Print Network (OSTI)

We discuss characterization of experimental quantum gates by the error matrix, which is similar to the standard process matrix $\\chi$ in the Pauli basis, except the desired unitary operation is factored out, by formally placing it either before or after the error process. The error matrix has only one large element, which is equal to the process fidelity, while other elements are small and indicate imperfections. The imaginary parts of the elements along the left column and/or top row directly indicate the unitary imperfection and can be used to find the needed correction. We discuss a relatively simple way to calculate the error matrix for a composition of quantum gates. Similarly, it is rather straightforward to find the first-order contribution to the error matrix due to the Lindblad-form decoherence. We also discuss a way to identify and subtract the tomography procedure errors due to imperfect state preparation and measurement. In appendices we consider several simple examples of the process tomography and also discuss an intuitive physical interpretation of the Lindblad-form decoherence.

Alexander N. Korotkov

2013-09-25T23:59:59.000Z

82

Quantum Zero-error Capacity  

E-Print Network (OSTI)

We define here a new kind of quantum channel capacity by extending the concept of zero-error capacity for a noisy quantum channel. The necessary requirement for which a quantum channel has zero-error capacity greater than zero is given. Finally, we point out some directions on how to calculate the zero-error capacity of such channels.

Rex A. C. Medeiros; Francisco M. De Assis

2006-11-08T23:59:59.000Z

83

How Do Actuaries Use Data Containing Errors?: Models of Error Detection and Error Correction  

Science Conference Proceedings (OSTI)

Information systems provide data for business processes and decision making. There is strong evidence that data items stored in organizational databases have a significant rate of errors. If undetected in use, errors in data may significantly affect ...

Barbara D. Klein

1997-10-01T23:59:59.000Z

84

Quantum error control codes  

E-Print Network (OSTI)

It is conjectured that quantum computers are able to solve certain problems more quickly than any deterministic or probabilistic computer. For instance, Shor's algorithm is able to factor large integers in polynomial time on a quantum computer. A quantum computer exploits the rules of quantum mechanics to speed up computations. However, it is a formidable task to build a quantum computer, since the quantum mechanical systems storing the information unavoidably interact with their environment. Therefore, one has to mitigate the resulting noise and decoherence effects to avoid computational errors. In this dissertation, I study various aspects of quantum error control codes - the key component of fault-tolerant quantum information processing. I present the fundamental theory and necessary background of quantum codes and construct many families of quantum block and convolutional codes over finite fields, in addition to families of subsystem codes. This dissertation is organized into three parts: Quantum Block Codes. After introducing the theory of quantum block codes, I establish conditions when BCH codes are self-orthogonal (or dual-containing) with respect to Euclidean and Hermitian inner products. In particular, I derive two families of nonbinary quantum BCH codes using the stabilizer formalism. I study duadic codes and establish the existence of families of degenerate quantum codes, as well as families of quantum codes derived from projective geometries. Subsystem Codes. Subsystem codes form a new class of quantum codes in which the underlying classical codes do not need to be self-orthogonal. I give an introduction to subsystem codes and present several methods for subsystem code constructions. I derive families of subsystem codes from classical BCH and RS codes and establish a family of optimal MDS subsystem codes. I establish propagation rules of subsystem codes and construct tables of upper and lower bounds on subsystem code parameters. Quantum Convolutional Codes. Quantum convolutional codes are particularly well-suited for communication applications. I develop the theory of quantum convolutional codes and give families of quantum convolutional codes based on RS codes. Furthermore, I establish a bound on the code parameters of quantum convolutional codes - the generalized Singleton bound. I develop a general framework for deriving convolutional codes from block codes and use it to derive families of non-catastrophic quantum convolutional codes from BCH codes. The dissertation concludes with a discussion of some open problems.

Abdelhamid Awad Aly Ahmed, Sala

2008-05-01T23:59:59.000Z

85

Browse Error - Energy Innovation Portal  

Share Browse Error - Energy Innovation Portal on Facebook; ... Contacts | Web Site Policies | U.S. Department of Energy | USA.gov Content Last ...

86

Architecture Design for Soft Errors  

Science Conference Proceedings (OSTI)

This book provides a comprehensive description of the architetural techniques to tackle the soft error problem. It covers the new methodologies for quantitative analysis of soft errors as well as novel, cost-effective architectural techniques to mitigate ... Keywords: Computer Architecture, Computer Engineering, Microprocessors

Shubu Mukherjee

2008-02-01T23:59:59.000Z

87

Inductively Coupled Plasma Mass Spectrometry Uranium Error Propagation  

SciTech Connect

The Hazards Control Department at Lawrence Livermore National Laboratory (LLNL) uses Inductively Coupled Plasma Mass Spectrometer (ICP/MS) technology to analyze uranium in urine. The ICP/MS used by the Hazards Control Department is a Perkin-Elmer Elan 6000 ICP/MS. The Department of Energy Laboratory Accreditation Program requires that the total error be assessed for bioassay measurements. A previous evaluation of the errors associated with the ICP/MS measurement of uranium demonstrated a {+-} 9.6% error in the range of 0.01 to 0.02 {micro}g/l. However, the propagation of total error for concentrations above and below this level have heretofore been undetermined. This document is an evaluation of the errors associated with the current LLNL ICP/MS method for a more expanded range of uranium concentrations.

Hickman, D P; Maclean, S; Shepley, D; Shaw, R K

2001-07-01T23:59:59.000Z

88

Quantum states characterization for the zero-error capacity  

E-Print Network (OSTI)

The zero-error capacity of quantum channels was defined as the least upper bound of rates at which classical information can be transmitted through a quantum channel with probability of error equal to zero. This paper investigates some properties of input states and measurements used to attain the quantum zero-error capacity. We start by reformulating the problem of finding the zero-error capacity in the language of graph theory. This alternative definition is used to prove that the zero-error capacity of any quantum channel can be reached by using tensor products of pure states as channel inputs, and projective measurements in the channel output. We conclude by presenting an example that illustrates our results.

Rex A C Medeiros; Romain Alleaume; Gerard Cohen; Francisco M. de Assis

2006-11-03T23:59:59.000Z

89

Error Statistics of VPR Corrections in Stratiform Precipitation  

Science Conference Proceedings (OSTI)

Errors in surface rainfall estimates that are caused by ignoring the vertical profile of reflectivity (VPR) and range effects have been assessed by simulating how fine-resolution 3D reflectivity measurements at close ranges are sampled by the ...

Aldo Bellon; Gyu Won Lee; Isztar Zawadzki

2005-07-01T23:59:59.000Z

90

The Geometry of Model Error  

Science Conference Proceedings (OSTI)

This paper investigates the nature of model error in complex deterministic nonlinear systems such as weather forecasting models. Forecasting systems incorporate two components, a forecast model and a data assimilation method. The latter projects ...

Kevin Judd; Carolyn A. Reynolds; Thomas E. Rosmond; Leonard A. Smith

2008-06-01T23:59:59.000Z

91

A Single-Station Approach to Model Output Statistics Temperature Forecast Error Assessment  

Science Conference Proceedings (OSTI)

Error characteristics of model output statistics (MOS) temperature forecasts are calculated for over 200 locations around the continental United States. The forecasts are verified on a station-by-station basis for the year 2001. Error measures ...

Andrew A. Taylor; Lance M. Leslie

2005-12-01T23:59:59.000Z

92

Continuous-time quantum error correction  

E-Print Network (OSTI)

Continuous-time quantum error correction (CTQEC) is an approach to protecting quantum information from noise in which both the noise and the error correcting operations are treated as processes that are continuous in time. This chapter investigates CTQEC based on continuous weak measurements and feedback from the point of view of the subsystem principle, which states that protected quantum information is contained in a subsystem of the Hilbert space. We study how to approach the problem of constructing CTQEC protocols by looking at the evolution of the state of the system in an encoded basis in which the subsystem containing the protected information is explicit. This point of view allows us to reduce the problem to that of protecting a known state, and to design CTQEC procedures from protocols for the protection of a single qubit. We show how previously studied CTQEC schemes with both direct and indirect feedback can be obtained from strategies for the protection of a single qubit via weak measurements and weak unitary operations. We also review results on the performance of CTQEC with direct feedback in cases of Markovian and non-Markovian decoherence, where we have shown that due to the existence of a Zeno regime in non-Markovian dynamics, the performance of CTQEC can exhibit a quadratic improvement if the time resolution of the weak error-correcting operations is high enough to reveal the non-Markovian character of the noise process.

Ognyan Oreshkov

2013-11-11T23:59:59.000Z

93

Uncorrelated Noise in Turbulence Measurements  

Science Conference Proceedings (OSTI)

We show that the error variance contributed by random uncorrelated measurement noise can be merged with the error variance contributed by real variations in the atmosphere to obtain a single expression for the total error variance when the ...

Donald H. Lenschow; Leif Kristensen

1985-03-01T23:59:59.000Z

94

Human Errors in Information Security  

E-Print Network (OSTI)

The purpose of the paper is to target audience and stakeholder individuals whom are in charge of securing the assets of their organisations and institutions. This paper starts by providing a brief overview of information security, outlining the main goals and techniques of the discipline. The paper also discusses the role of human factors and how the information security research community has recognised the increasingly crucial role of human behaviour in many security failures. This is followed by a literature review of human errors in information security. Finally, this paper discusses Reason's Generic Error Modelling System (GEMS) as a potential model for explaining human errors in information security [18]. The terms computer security, network security and information security are used interchangeably in this paper.

Munir Ahmed; Lukman Sharif; Muhammad Kabir; Maha Al-maimani

2012-01-01T23:59:59.000Z

95

Human Errors: Disadvantages and Advantages  

E-Print Network (OSTI)

The traditional paradigm for learning and training of operators in complex systems is discussed and criticised to react on the strong influence (the doctrine of 'mental logic') coming from research carried out in artificial intelligence (AI). The most well known arguments against the AI-approach are presented and discussed in relation to expertise, intuition and implicit knowledge. The importance of faults and errors are discussed in the context of a new metaphor for cognitive structures to describe expertise, and how knowledge about unsuccessful behavior influences the actual decision making process of experts. Keywords: human error, meta learning, mental model, experience, expertise 1. INTRODUCTION Why is this type of statements "I learned more from my defeats than from my victories" (Napoleon, ca. 1819) sometimes (or always) true? To answer this question we need a new understanding of human errors, inefficient behavior, and expertise. In this paper we will discuss the importance of...

Matthias Rauterberg; Daniel Felix

1996-01-01T23:59:59.000Z

96

Definition: Time Error | Open Energy Information  

Open Energy Info (EERE)

of Frequency Error over a given period.1 Related Terms Interconnection, sustainability, frequency error, smart grid References Glossary of Terms Used in Reliability...

97

Error-correcting codes and cryptography  

Science Conference Proceedings (OSTI)

Oct 20, 2006 ... topics where error-correcting codes overlap with cryptography. In some of these ..... human errors, e.g., misconfigurations or bugs. If biological ...

98

Using doppler radar images to estimate aircraft navigational heading error  

SciTech Connect

A yaw angle error of a motion measurement system carried on an aircraft for navigation is estimated from Doppler radar images captured using the aircraft. At least two radar pulses aimed at respectively different physical locations in a targeted area are transmitted from a radar antenna carried on the aircraft. At least two Doppler radar images that respectively correspond to the at least two transmitted radar pulses are produced. These images are used to produce an estimate of the yaw angle error.

Doerry, Armin W. (Albuquerque, NM); Jordan, Jay D. (Albuquerque, NM); Kim, Theodore J. (Albuquerque, NM)

2012-07-03T23:59:59.000Z

99

Error Reduction for Weigh-In-Motion  

Science Conference Proceedings (OSTI)

Federal and State agencies need certifiable vehicle weights for various applications, such as highway inspections, border security, check points, and port entries. ORNL weigh-in-motion (WIM) technology was previously unable to provide certifiable weights, due to natural oscillations, such as vehicle bouncing and rocking. Recent ORNL work demonstrated a novel filter to remove these oscillations. This work shows further filtering improvements to enable certifiable weight measurements (error < 0.1%) for a higher traffic volume with less effort (elimination of redundant weighing).

Hively, Lee M [ORNL; Abercrombie, Robert K [ORNL; Scudiere, Matthew B [ORNL; Sheldon, Frederick T [ORNL

2009-01-01T23:59:59.000Z

100

Generalized Error Analysis for Conventional and Remote Reference Magnetotellurics  

DOE Green Energy (OSTI)

An error analysis which applies to both conventional and remote reference magnetotelluric impedance and tipper estimates is developed based on the assumption that noise in the field measurements is governed by a complex normal distribution. Under the assumed model of noise it is shown that the theoretical expressions for the variances and covariances derived recently by Gamble et al (1979b) specifically for remote reference estimates apply to conventional estimates as well. However, calculations are biased if the impedance or tipper functions are biased. The impedance and tipper functions are calculated as ratios of two random functions of noisy field measurements. The expressions for the variances and covariances account for noise in both the numerator and denominator of the estimates. They are useful provided the probability that the magnitude of the random error in the denominator exceeds the magnitude of its expected value is small. Expressions for the bias errors of the impedance and tipper functions are obtained in order to assess the relative contributions of random and bias errors to the man squared error of the estimates. The relative magnitude of both random and bias errors depends on the noise level and on the values of the sample coherencies between various pairs of the field measurements used to compute a particular estimate.

Stodt, John A.

1982-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Heading Error Removal System for Tracking Devices - Energy ...  

Systems are able to reduce or remove slowly-varying drift errors, such as heading errors, rate of rotation errors, and direction of travel errors, to correct the ...

102

Error Exponent Region for Gaussian  

E-Print Network (OSTI)

Introduction We introduce the notion of error exponent region (EER) for a multi-user channel. This region specifies the set of errorexponent vectors, which are simultaneously achievable by all users in the multi-user channel [1]. In this work, we derive an inner bound (achievable region) and an outer bound for the error exponent region of a Gaussian multiple access channel (GMAC). II. Formulation and Main Result An error exponent region for a multi-user channel depends on the channel operating (rate) point. For a two-user channel, we use the notation EER(R1 , R2 ) to denote the EER when the channel is operated at rate pair (R1 , R2 ). Consider a GMAC Y = X1 +X2 + Z, (1) where X1 and X2 are the channel inputs for user 1 and user 2 with E(X 1 ) = SNR1 , E(X 2 ) = SNR2 , and Z is white Gaussian noise with unit variance. Denote E(R,SNR) the maximum of random coding exponent and expurgated exponent of a single-user Gaussian channel. Our main result follow. Theorem 1: For a two-user GM

Multiple Access Channels; Lihua Weng; Achilleas Anastasopoulos; Eep Pradhan

2004-01-01T23:59:59.000Z

103

Incorporating Misclassification Error in Skill Assessment  

Science Conference Proceedings (OSTI)

It is desirable to account for misclassification error of meteorological observations so that the true skill of the forecast can be assessed. Errors in observations can occur, among other places, in pilot reports of icing and in tornado spotting. ...

William Briggs; Matt Pocernich; David Ruppert

2005-11-01T23:59:59.000Z

104

Systematic Tendency Error in Budget Calculations  

Science Conference Proceedings (OSTI)

Atmospheric budget calculations suffer from various observational and numerical errors. This paper demonstrates that all budget calculations applied to a large number of samples suffer from additional errors originating from systematic tendency ...

Masao Kanamitsu; Suranjana Saha

1996-06-01T23:59:59.000Z

105

Review of Radiosonde Humidity and Temperature Errors  

Science Conference Proceedings (OSTI)

An attempt is made to provide a brief but comprehensive summary of sources of error in National Weather Service upper air data, and a guide to the relevant literature. Error analysis must be tailored for particular applications. Temperature ...

Robert W. Pratt

1985-09-01T23:59:59.000Z

106

Sources of Error in Objective Analysis  

Science Conference Proceedings (OSTI)

The errors in objective analysis methods that are based on corrections to first-guess fields are considered. An expression that gives a decomposition of an error into three independent components is derived. To test the magnitudes of the ...

Richard Franke

1985-02-01T23:59:59.000Z

107

Testing and Error Analysis of Acceleration of Rotating Transformer  

Science Conference Proceedings (OSTI)

From the working principle of rotary transformers, the paper in-depth analyses the relationship between output voltage and rotor angle as well as speed. By using the method of series expansion and discrete, angular acceleration formula which is used ... Keywords: Rotating Transformer, Acceleration, Error of Measurement, slip frequency

Lu Xiuhe; Xue Peng

2010-07-01T23:59:59.000Z

108

A JVM for soft-error-prone embedded systems  

Science Conference Proceedings (OSTI)

The reduction of structure sizes in microcontollers, environmental conditions or low supply voltages increase the susceptibility of embedded systems to soft errors. As a result, the employment of fault-detection and fault-tolerance measures is becoming ... Keywords: KESO, RTSJ, embedded systems, java, real-time systems, reliability

Isabella Stilkerich, Michael Strotz, Christoph Erhardt, Martin Hoffmann, Daniel Lohmann, Fabian Scheler, Wolfgang Schröder-Preikschat

2013-06-01T23:59:59.000Z

109

Note: Statistical errors estimation for Thomson scattering diagnostics  

SciTech Connect

A practical way of estimating statistical errors of a Thomson scattering diagnostic measuring plasma electron temperature and density is described. Analytically derived expressions are successfully tested with Monte Carlo simulations and implemented in an automatic data processing code of the JET LIDAR diagnostic.

Maslov, M.; Beurskens, M. N. A.; Flanagan, J.; Kempenaars, M. [EURATOM-CCFE Fusion Association, Culham Science Centre, Abingdon, Oxon OX14 3DB (United Kingdom); Collaboration: JET-EFDA Contributors

2012-09-15T23:59:59.000Z

110

[an error occurred while processing this directive  

Science Conference Proceedings (OSTI)

[an error occurred while processing this directive] ... Thus, many systems administrators do not regularly update non ... works well but it does not protect ...

111

[an error occurred while processing this directive  

Science Conference Proceedings (OSTI)

[an error occurred while processing this directive] These are ... of commercial products within NIST web pages is for information only; it does not imply ...

112

Error suppression and error correction in adiabatic quantum computation I: techniques and challenges  

E-Print Network (OSTI)

Adiabatic quantum computation (AQC) is known to possess some intrinsic robustness, though it is likely that some form of error correction will be necessary for large scale computations. Error handling routines developed for circuit-model quantum computation do not transfer easily to the AQC model since these routines typically require high-quality quantum gates, a resource not generally allowed in AQC. There are two main techniques known to suppress errors during an AQC implementation: energy gap protection and dynamical decoupling. Here we show that both these methods are intimately related and can be analyzed within the same formalism. We analyze the effectiveness of such error suppression techniques and identify critical constraints on the performance of error suppression in AQC, suggesting that error suppression by itself is insufficient for large-scale, fault-tolerant AQC and that a form of error correction is needed. We discuss progress towards implementing error correction in AQC and enumerate several key outstanding problems. This work is a companion paper to "Error suppression and error correction in adiabatic quantum computation II: non-equilibrium dynamics"', which provides a dynamical model perspective on the techniques and limitations of error suppression and error correction in AQC. In this paper we discuss the same results within a quantum information framework, permitting an intuitive discussion of error suppression and correction in encoded AQC.

Kevin C. Young; Mohan Sarovar; Robin Blume-Kohout

2013-07-22T23:59:59.000Z

113

Wind Power Forecasting Error Distributions over Multiple Timescales (Presentation)  

DOE Green Energy (OSTI)

This presentation presents some statistical analysis of wind power forecast errors and error distributions, with examples using ERCOT data.

Hodge, B. M.; Milligan, M.

2011-07-01T23:59:59.000Z

114

Word error rates: Decomposition over POS classes and applications for error analysis  

E-Print Network (OSTI)

Evaluation and error analysis of machine translation output are important but difficult tasks. In this work, we propose a novel method for obtaining more details about actual translation errors in the generated output by introducing the decomposition of Word Error Rate (WER) and Position independent word Error Rate (PER) over different Partof-Speech (POS) classes. Furthermore, we investigate two possible aspects of the use of these decompositions for automatic error analysis: estimation of inflectional errors and distribution of missing words over POS classes. The obtained results are shown to correspond to the results of a human error analysis. The results obtained on the European Parliament Plenary Session corpus in Spanish and English give a better overview of the nature of translation errors as well as ideas of where to put efforts for possible improvements of the translation system. 1

Maja Popovi?; Hermann Ney

2007-01-01T23:59:59.000Z

115

Resilience of Hybrid Ensemble/3DVAR Analysis Schemes to Model Error and Ensemble Covariance Error  

Science Conference Proceedings (OSTI)

Previous idealized numerical experiments have shown that a straightforward augmentation of an isotropic error correlation matrix with an ensemble-based error correlation matrix yields an improved data assimilation scheme under certain conditions. ...

Brian J. Etherton; Craig H. Bishop

2004-05-01T23:59:59.000Z

116

Dynamics of Prediction Errors under the Combined Effect of Initial Condition and Model Errors  

Science Conference Proceedings (OSTI)

The transient evolution of prediction errors in the short to intermediate time regime is considered under the combined effect of initial condition and model errors. Some generic features are brought out and connected with intrinsic properties. ...

C. Nicolis; Rui A. P. Perdigao; S. Vannitsem

2009-03-01T23:59:59.000Z

117

Hopper Trouble Shooting and Error Messages  

NLE Websites -- All DOE Office Websites (Extended Search)

Trouble Shooting and Error Messages Trouble Shooting and Error Messages Trouble Shooting and Error Messages Error Messages Message or Symptom Fault Recommendation job hit wallclock time limit user or system Submit job for longer time or start job from last checkpoint and resubmit. If your job hung and produced no output contact consultants. received node failed or halted event for nid xxxx system One of the compute nodes assigned to the job failed. Resubmit the job PtlNIInit failed : PTL_NOT_REGISTERED user The executable is from an XT system (Franklin or Jaguar?) using portals. Recompile on Hopper and resubmit. error while loading shared libraries: libxxxx.so: cannot open shared object file: No such file or directory mostly user, sometimes system Make sure environment variable CRAY_ROOTFS is set to DSL, also the modules loaded when building the dynamic executable is also loaded at run time. Report to consultants if still not resolved.

118

Lossless Data Compression with Error Detection using Cantor Set  

E-Print Network (OSTI)

In 2009, a lossless compression algorithm based on 1D chaotic maps known as Generalized Lur\\"{o}th Series (or GLS) has been proposed. This algorithm (GLS-coding) encodes the input message as a symbolic sequence on an appropriate 1D chaotic map (GLS) and the compressed file is obtained as the initial value by iterating backwards on the map. For ergodic sources, it was shown that GLS-coding achieves the best possible lossless compression (in the noiseless setting) bounded by Shannon entropy. However, in the presence of noise, even small errors in the compressed file leads to catastrophic decoding errors owing to sensitive dependence on initial values. In this paper, we first show that Repetition codes $\\mathcal{R}_n$ (every symbol is repeated $n$ times, where $n$ is a positive odd integer), the oldest and the most basic error correction and detection codes in literature, actually lie on a Cantor set with a fractal dimension of $\\frac{1}{n}$, which is also the rate of the code. Inspired by this, we incorporate error detection capability to GLS-coding by ensuring that the compressed file (initial value on the map) lies on a Cantor set of measure zero. Even a 1-bit error in the initial value will throw it outside the Cantor set which can be detected while decoding. The error detection performance (and also the rate of the code) can be controlled by the fractal dimension of the Cantor set and could be suitably adjusted depending on the noise level of the communication channel.

Nithin Nagaraj

2013-08-10T23:59:59.000Z

119

MAXIMUM LIKELIHOOD ANALYSIS OF SYSTEMATIC ERRORS IN INTERFEROMETRIC OBSERVATIONS OF THE COSMIC MICROWAVE BACKGROUND  

SciTech Connect

We investigate the impact of instrumental systematic errors in interferometric measurements of the cosmic microwave background (CMB) temperature and polarization power spectra. We simulate interferometric CMB observations to generate mock visibilities and estimate power spectra using the statistically optimal maximum likelihood technique. We define a quadratic error measure to determine allowable levels of systematic error that does not induce power spectrum errors beyond a given tolerance. As an example, in this study we focus on differential pointing errors. The effects of other systematics can be simulated by this pipeline in a straightforward manner. We find that, in order to accurately recover the underlying B-modes for r = 0.01 at 28 < l < 384, Gaussian-distributed pointing errors must be controlled to 0. Degree-Sign 7 root mean square for an interferometer with an antenna configuration similar to QUBIC, in agreement with analytical estimates. Only the statistical uncertainty for 28 < l < 88 would be changed at {approx}10% level. With the same instrumental configuration, we find that the pointing errors would slightly bias the 2{sigma} upper limit of the tensor-to-scalar ratio r by {approx}10%. We also show that the impact of pointing errors on the TB and EB measurements is negligibly small.

Zhang Le; Timbie, Peter [Department of Physics, University of Wisconsin, Madison, WI 53706 (United States); Karakci, Ata; Korotkov, Andrei; Tucker, Gregory S. [Department of Physics, Brown University, 182 Hope Street, Providence, RI 02912 (United States); Sutter, Paul M.; Wandelt, Benjamin D. [Department of Physics, 1110 W Green Street, University of Illinois at Urbana-Champaign, Urbana, IL 61801 (United States); Bunn, Emory F., E-mail: lzhang263@wisc.edu [Physics Department, University of Richmond, Richmond, VA 23173 (United States)

2013-06-01T23:59:59.000Z

120

Measurement Errors and Outliers in Seasonal Unit Root Testing  

E-Print Network (OSTI)

fS ff fee fef fDb fH fDf fH fDD f.H fH fDf feH f D A@M*iSfeS f fef f2S fSb f.  f.D f f2f fbS fbe fb 22 f2 fe fDDfDD fDD fD fSH f.H f.f fe fHb fb f fe fb f. SS f2 2Df

Haldrup, Niels Prof.; Montanes, Antonio; Sansó, Andreu

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Error Field Measurement Techniques for ITER Using Plasma Response  

E-Print Network (OSTI)

Bull. Am. Phys. Soc. 55, 375 (2010)52nd American Physical Society Annual Meeting of Division of Plasma Physics Chicago Illinois, US, 2010999618575

Strait, E.J.

2010-08-24T23:59:59.000Z

122

Verification of unfold error estimates in the unfold operator code  

SciTech Connect

Spectral unfolding is an inverse mathematical operation that attempts to obtain spectral source information from a set of response functions and data measurements. Several unfold algorithms have appeared over the past 30 years; among them is the unfold operator (UFO) code written at Sandia National Laboratories. In addition to an unfolded spectrum, the UFO code also estimates the unfold uncertainty (error) induced by estimated random uncertainties in the data. In UFO the unfold uncertainty is obtained from the error matrix. This built-in estimate has now been compared to error estimates obtained by running the code in a Monte Carlo fashion with prescribed data distributions (Gaussian deviates). In the test problem studied, data were simulated from an arbitrarily chosen blackbody spectrum (10 keV) and a set of overlapping response functions. The data were assumed to have an imprecision of 5{percent} (standard deviation). One hundred random data sets were generated. The built-in estimate of unfold uncertainty agreed with the Monte Carlo estimate to within the statistical resolution of this relatively small sample size (95{percent} confidence level). A possible 10{percent} bias between the two methods was unresolved. The Monte Carlo technique is also useful in underdetermined problems, for which the error matrix method does not apply. UFO has been applied to the diagnosis of low energy x rays emitted by Z-pinch and ion-beam driven hohlraums. {copyright} {ital 1997 American Institute of Physics.}

Fehl, D.L.; Biggs, F. [Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)] [Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)

1997-01-01T23:59:59.000Z

123

A Critical Evaluation of the Aerodynamical Error of a Turbulence Instrument  

Science Conference Proceedings (OSTI)

An instrument, intended for tower-borne measurements of atmospheric turbulence, constructed at the Department of Meteorology, Uppsala University, has been carefully tested for the errors induced by the local flow around the instrument itself, ...

Ulf Högström

1982-12-01T23:59:59.000Z

124

Skill Scores Based on the Mean Square Error and Their Relationships to the Correlation Coefficient  

Science Conference Proceedings (OSTI)

Several skill scores are defined, based on the mean-square-error measure of accuracy and alternative climatological standards of reference. Decompositions of these skill scores are formulated, each of which is shown to possess terms involving 1) ...

Allan H. Murphy

1988-12-01T23:59:59.000Z

125

Estimation of Gamma Raindrop Size Distribution Parameters: Statistical Fluctuations and Estimation Errors  

Science Conference Proceedings (OSTI)

The gamma distribution is often used to characterize raindrop size distributions (DSDs). However, the estimation of measured raindrop distributions suffers from the shortcomings of statistical sampling errors, which become increasingly ...

Cécile Mallet; Laurent Barthes

2009-08-01T23:59:59.000Z

126

Harmonic Analysis Errors in Calculating Dipole,  

NLE Websites -- All DOE Office Websites (Extended Search)

Harmonic Analysis Errors in Calculating Dipole, Harmonic Analysis Errors in Calculating Dipole, Quadrupole, and Sextupole Magnets using POISSON Ro be rt J. La ri<::::R~ i. September 10, 1985 Introduction LS-32 The computer program POISSON was used to calculate the dipole, quadru- pole, and sextupole magnets of the 6 GeV electron storage ring. A trinagular mesh must first be generated by LATTICE. The triangle size is varied over the "universe" at the discretion of the user. This note describes a series of test calculations that were made to help the user decide on the size of the mesh to reduce the harmonic field calculation errors. A conformal transfor- mation of a multipole magnet into a dipole reduces these errors. Dipole Magnet Calculations A triangular mesh used to calculate a "perfect" dipole magnet is shown in

127

Effectiveness of various error metrics in SCEPTRE.  

Science Conference Proceedings (OSTI)

The objective of this project is to investigate accuracy of error metrics in SCEPTRE and produce useful benchmarks, identify metrics that do not work well, identify metrics that do work well, and produce easy to reference results.

Olson, Aaron

2010-08-01T23:59:59.000Z

128

Spatial Error Metrics for Oceanographic Model Verification  

Science Conference Proceedings (OSTI)

A common problem with modern numerical oceanographic models is spatial displacement, including misplacement and misshapenness of ocean circulation features. Traditional error metrics, such as least squares methods, are ineffective in many such ...

Sean B. Ziegeler; James D. Dykes; Jay F. Shriver

2012-02-01T23:59:59.000Z

129

Data Assimilation via Error Subspace Statistical Estimation.  

Science Conference Proceedings (OSTI)

Identical twin experiments are utilized to assess and exemplify the capabilities of error subspace statistical estimation (ESSE). The experiments consists of nonlinear, primitive equation–based, idealized Middle Atlantic Bight shelfbreak front ...

P. F. J. Lermusiaux

1999-07-01T23:59:59.000Z

130

Regression Error Characteristic CurVes  

E-Print Network (OSTI)

Receiver Operating Characteristic (ROC) curves provide a powerful tool for visualizing and comparing classification results. Regression Error Characteristic (REC) curves generalize ROC curves to regression. REC curves plot the error tolerance on the xaxis versus the percentage of points predicted within the tolerance on the y-axis. The resulting curve estimates the cumulative distribution function of the error. The REC curve visually presents commonly-used statistics. The area-over-the-curve (AOC) is a biased estimate of the expected error. The R 2 value can be estimated using the ratio of the AOC for a given model to the AOC for the null model. Users can quickly assess the relative merits of many regression functions by examining the relative position of their REC curves. The shape of the curve reveals additional information that can be used to guide modeling. 1.

Jinbo Bi; Kristin P. Bennett

2003-01-01T23:59:59.000Z

131

Error bounds: necessary and sufficient conditions  

E-Print Network (OSTI)

from the primal as well as from the dual space are used to characterize the error bound property .... known as conditioning rate [45]): Er f(¯x) := lim inf x??x.

132

Errors and paradoxes in quantum mechanics  

E-Print Network (OSTI)

Errors and paradoxes in quantum mechanics, entry in the Compendium of Quantum Physics: Concepts, Experiments, History and Philosophy, ed. F. Weinert, K. Hentschel, D. Greenberger and B. Falkenburg (Springer), to appear

D. Rohrlich

2007-08-28T23:59:59.000Z

133

Panels with Nonstationary Multifactor Error Structures  

E-Print Network (OSTI)

panel regressions with multifactor error structure. This paper extends this work and examines the important case where the unobserved common factors follow unit root processes and could be cointegrated. It is found that the presence of unit roots does...

Kapetanios, George; Pesaran, M Hashem; Yamagata, Takashi

134

Estimation of Errors in Seasonal Cycles  

Science Conference Proceedings (OSTI)

A formula is first given for the error in a 2-harmonic seasonal curve of best fit through a set of N oceanographic data points, assuming the departures from the true mean are independent random numbers.

J. S. Godfrey; K. R. Ridgway

1985-08-01T23:59:59.000Z

135

Minimizing Errors Associated with Multiplate Radiation Shields  

Science Conference Proceedings (OSTI)

Multiplate radiation shield errors are examined using the following techniques: 1) ray tracing analysis, 2) wind tunnel experiments, 3) numerical flow simulations, and 4) field testing. The authors’ objectives are to develop guidelines for ...

Scott J. Richardson; Fred V. Brock; Steven R. Semmer; Cathy Jirak

1999-11-01T23:59:59.000Z

136

Short-Term Dynamics of Model Errors  

Science Conference Proceedings (OSTI)

The natural instability of the atmosphere is at the origin of the rapid amplification of errors coming from the uncertainty on the initial conditions and from the imperfect representation (the model) of the atmospheric dynamics. In this paper, ...

S. Vannitsem; Z. Toth

2002-09-01T23:59:59.000Z

137

Diagnosing Forecast Errors in Tropical Cyclone Motion  

Science Conference Proceedings (OSTI)

This paper reports on the development of a diagnostic approach that can be used to examine the sources of numerical model forecast error that contribute to degraded tropical cyclone (TC) motion forecasts. Tropical cyclone motion forecasts depend ...

Thomas J. Galarneau Jr.; Christopher A. Davis

2013-02-01T23:59:59.000Z

138

Error driven paraphrase annotation using Mechanical Turk  

Science Conference Proceedings (OSTI)

The source text provided to a machine translation system is typically only one of many ways the input sentence could have been expressed, and alternative forms of expression can often produce a better translation. We introduce here error driven paraphrasing ...

Olivia Buzek; Philip Resnik; Benjamin B. Bederson

2010-06-01T23:59:59.000Z

139

Quantum error-correcting codes and devices  

DOE Patents (OSTI)

A method of forming quantum error-correcting codes by first forming a stabilizer for a Hilbert space. A quantum information processing device can be formed to implement such quantum codes.

Gottesman, Daniel (Los Alamos, NM)

2000-10-03T23:59:59.000Z

140

Minimizing Binding Errors Using Learned Conjunctive Features  

Science Conference Proceedings (OSTI)

We have studied some of the design trade-offs governing visual representations based on spatially invariant conjunctive feature detectors, with an emphasis on the susceptibility of such systems to false-positive recognition errors—Malsburg's classical ...

Bartlett W. Mel; József W. Fiser

2000-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Minimizing Binding Errors Using Learned Conjunctive Features  

Science Conference Proceedings (OSTI)

We have studied some of the design trade-offs governing visual representations based on spatially invariant conjunctive feature detectors, with an emphasis on the susceptibility of such systems to false-positive recognition errors—Malsburg’s ...

Bartlett W. Mel; Jósef W. Fiser

2000-04-01T23:59:59.000Z

142

Assessing the Ensemble Spread-Error Relationship  

Science Conference Proceedings (OSTI)

The potential ability of an ensemble prediction system (EPS) to represent its own varying forecast error provides strong motivation to produce an EPS over a less expensive deterministic forecast. Traditionally this ability has been assessed by ...

T. M. Hopson

143

Organizational Errors: Directions for Future Research  

E-Print Network (OSTI)

The goal of this chapter is to promote research about organizational errors—i.e., the actions of multiple organizational participants that deviate from organizationally specified rules and can potentially result in adverse ...

Carroll, John Stephen

144

How to keep your head above water while detecting errors  

Science Conference Proceedings (OSTI)

Today's distributed systems need runtime error detection to catch errors arising from software bugs, hardware errors, or unexpected operating conditions. A prominent class of error detection techniques operates in a stateful manner, i.e., it keeps track ... Keywords: J2EE multi-tier systems, hidden markov model, high throughput distributed applications, intelligent sampling, stateful error detection

Ignacio Laguna; Fahad A. Arshad; David M. Grothe; Saurabh Bagchi

2009-11-01T23:59:59.000Z

145

A systems approach to reducing utility billing errors  

E-Print Network (OSTI)

Many methods for analyzing the possibility of errors are practiced by organizations who are concerned about safety and error prevention. However, in situations where the error occurrence is random and difficult to track, ...

Ogura, Nori

2013-01-01T23:59:59.000Z

146

A Nonlinear Generalized Additive Error Model of Production and Cost  

E-Print Network (OSTI)

Additive Error Model of Production and Cost by Quirino ParisError Model of Production and Cost Quirino Paris* UniversityAdditive Error Model of Production and Cost I. Introduction

Paris, Quirino; Caputo, Michael R.

2004-01-01T23:59:59.000Z

147

Evolutionary Algorithm-Based Error Parameterization Methods for Data Assimilation  

Science Conference Proceedings (OSTI)

The methods of parameterizing model errors have a substantial effect on the accuracy of ensemble data assimilation. After a review of the current error-handling methods, a new blending error parameterization method was designed to combine the ...

Yulong Bai; Xin Li

2011-08-01T23:59:59.000Z

148

Explicitly Accounting for Observation Error in Categorical Verification of Forecasts  

Science Conference Proceedings (OSTI)

Given an accurate representation of errors in observations it is possible to remove the effect of those errors from categorical verification scores. The errors in the observations are treated as additive white noise that is statistically ...

Neill E. Bowler

2006-06-01T23:59:59.000Z

149

ERROR COMPENSATOR FOR A POSITION TRANSDUCER  

DOE Patents (OSTI)

A device is designed for eliminating the effect of leadscrew errors in positioning machines in which linear motion of a slide is effected from rotary motion of a leadscrew. This is accomplished by providing a corrector cam mounted on the slide, a cam follower, and a transducer housing rotatable by the follower to compensate for all the reproducible errors in the transducer signal which can be related to the slide position. The transducer has an inner part which is movable with respect to the transducer housing. The transducer inner part is coupled to the means for rotating the leadscrew such that relative movement between this part and its housing will provide an output signal proportional to the position of the slide. The corrector cam and its follower perform the compensation by changing the angular position of the transducer housing by an amount that is a function of the slide position and the error at that position. (AEC)

Fowler, A.H.

1962-06-12T23:59:59.000Z

150

U-058: Apache Struts Conversion Error OGNL Expression Injection...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

8: Apache Struts Conversion Error OGNL Expression Injection Vulnerability U-058: Apache Struts Conversion Error OGNL Expression Injection Vulnerability December 12, 2011 - 9:00am...

151

Underestimating Costs in Public Works Projects: Error or Lie?  

E-Print Network (OSTI)

1964). Errors in project cost estimates. Indian Eco- nomicSystematic errors in cost estimates for public investmentprojects compare in cost estimate experience? (Reprint No.

Flyvbjerg, Bent; Holm, Mette Skamris; Buhl, Søren

2006-01-01T23:59:59.000Z

152

Laser Phase Errors in Seeded FELs  

Science Conference Proceedings (OSTI)

Harmonic seeding of free electron lasers has attracted significant attention from the promise of transform-limited pulses in the soft X-ray region. Harmonic multiplication schemes extend seeding to shorter wavelengths, but also amplify the spectral phase errors of the initial seed laser, and may degrade the pulse quality. In this paper we consider the effect of seed laser phase errors in high gain harmonic generation and echo-enabled harmonic generation. We use simulations to confirm analytical results for the case of linearly chirped seed lasers, and extend the results for arbitrary seed laser envelope and phase.

Ratner, D.; Fry, A.; Stupakov, G.; White, W.; /SLAC

2012-03-28T23:59:59.000Z

153

Minimum error discrimination of Pauli channels  

E-Print Network (OSTI)

We solve the problem of discriminating with minimum error probability two given Pauli channels. We show that, differently from the case of discrimination between unitary transformations, the use of entanglement with an ancillary system can strictly improve the discrimination, and any maximally entangled state allows to achieve the optimal discrimination. We also provide a simple necessary and sufficient condition in terms of the structure of the channels for which the ultimate minimum error probability can be achieved without entanglement assistance. When such a condition is satisfied, the optimal input state is simply an eigenstate of one of the Pauli matrices.

Massimiliano F. Sacchi

2005-06-09T23:59:59.000Z

154

GenERRate: generating errors for use in grammatical error detection  

Science Conference Proceedings (OSTI)

This paper explores the issue of automatically generated ungrammatical data and its use in error detection, with a focus on the task of classifying a sentence as grammatical or ungrammatical. We present an error generation tool called GenERRate and show ...

Jennifer Foster; Øistein E. Andersen

2009-06-01T23:59:59.000Z

155

ACTION AND PHASE ANALYSIS TO DETERMINE SEXTUPOLE ERRORS IN RHIC AND THE SPS.  

Science Conference Proceedings (OSTI)

Success in the application of the action and phase analysis to find linear errors at RHIC Interaction Regions [1] has encouraged the creation of a technique based on the action and phase analysis to find non linear errors. In this paper we show the first attempt to measure the sextupole components at RHIC interaction regions using the action and phase method. Experiments done by intentionally activating sextupoles in RHIC and in SPS [2] will also be analyzed with this method. First results have given values for the sextupole errors that at least have the same order of magnitude as the values found by an alternate technique during the RHIC 2001 run [3].

CARDONA,J.PEGGS,S.SATOGATA,T.TOMAS,R.

2003-05-12T23:59:59.000Z

156

Error resilient video streaming for heterogeneous networks  

Science Conference Proceedings (OSTI)

We consider the problem of video streaming for a critical private web cast, for a medium sized audience with heterogeneous nodes having different bandwidths and reliabilities. The nodes can distribute video in a peer-to-peer manner by forming a multicast ... Keywords: error resilience, multiple description coding (MDC), path diversity, video streaming

Divyashikha Sethia; Huzur Saran

2006-12-01T23:59:59.000Z

157

Error bounds of certain Gaussian quadrature formulae  

Science Conference Proceedings (OSTI)

We study the kernel of the remainder term of Gauss quadrature rules for analytic functions with respect to one class of Bernstein-Szego weight functions. The location on the elliptic contours where the modulus of the kernel attains its maximum value ... Keywords: Analytic function, Elliptic contour, Error bound, Gauss quadrature, Kernel, Remainder term, primary, secondary

Miodrag M. Spalevi?; Miroslav S. Prani?

2010-06-01T23:59:59.000Z

158

Evaluating operating system vulnerability to memory errors  

Science Conference Proceedings (OSTI)

Reliability is of great concern to the scalability of extreme-scale systems. Of particular concern are soft errors in main memory, which are a leading cause of failures on current systems and are predicted to be the leading cause on future systems. While ... Keywords: DRAM failures, fault-tolerance, operating systems

Kurt B. Ferreira; Kevin Pedretti; Ron Brightwell; Patrick G. Bridges; David Fiala; Frank Mueller

2012-06-01T23:59:59.000Z

159

Collective error detection for MPI collective operations  

Science Conference Proceedings (OSTI)

An MPI profiling library is a standard mechanism for intercepting MPI calls by applications. Profiling libraries are so named because they are commonly used to gather performance data on MPI programs. Here we present a profiling library whose purpose ... Keywords: MPI, collective, datatype, errors, hashing

Chris Falzone; Anthony Chan; Ewing Lusk; William Gropp

2005-09-01T23:59:59.000Z

160

Explaining ML type errors by data flows  

Science Conference Proceedings (OSTI)

We present a novel approach to explaining ML type errors: Since the type system inhibits data flows that would abort the program at run-time, our type checker identifies as explanations those data flows that violate the typing rules. It also detects ...

Holger Gast

2004-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Regularities and their relations to error bounds  

Science Conference Proceedings (OSTI)

In this paper, we mainly study various notions of regularity for a finite collection {C1,?,Cm} of closed convex subsets of a Banach space X and their relations with other fundamental concepts. ... Keywords: error bound, graph, linearly regular, multifunction, normal cone, positive linear functional, property (G), regular, strong CHIP, tangent cone

Kung Fu Ng; Wei Hong Yang

2004-04-01T23:59:59.000Z

162

Potentially Significant Source of Error in Magnetic Paleolatitude Determinations  

E-Print Network (OSTI)

The discovery of close-to-star gas-giant exo-planets lends support to the idea of Earth's origin as a Jupiter-like gas giant and to the consequences of its compression, including whole-Earth decompression dynamics that gives rise, without requiring mantle convection, to the myriad measurements and observations whose descriptions are attributed to plate tectonics. I show here that paleolatitude determinations, used extensively in Pangaea-like reconstructions and in paleoclimate considerations, may be subject to potentially significant errors if rock-magnetization was acquired at Earth-radii less than present.

J. Marvin Herndon

2011-03-03T23:59:59.000Z

163

Analysis of Solar Two Heliostat Tracking Error Sources  

DOE Green Energy (OSTI)

This paper explores the geometrical errors that reduce heliostat tracking accuracy at Solar Two. The basic heliostat control architecture is described. Then, the three dominant error sources are described and their effect on heliostat tracking is visually illustrated. The strategy currently used to minimize, but not truly correct, these error sources is also shown. Finally, a novel approach to minimizing error is presented.

Jones, S.A.; Stone, K.W.

1999-01-28T23:59:59.000Z

164

Distribution of Wind Power Forecasting Errors from Operational Systems (Presentation)  

SciTech Connect

This presentation offers new data and statistical analysis of wind power forecasting errors in operational systems.

Hodge, B. M.; Ela, E.; Milligan, M.

2011-10-01T23:59:59.000Z

165

Error Analysis of Heat Transfer for Finned-Tube Heat-Exchanger Text-Board  

E-Print Network (OSTI)

In order to reduce the measurement error of heat transfer in water and air side for finned-tube heat-exchanger as little as possible, and design a heat-exchanger test-board measurement system economically, based on the principle of test-board system error analyses and design, the equation of measurement error of heat transfer in air side and water side about orifice meter for the finned-tube heat-exchanger was obtained. This paper studies the major factors that may influence the largest admitted measurement error of measurement instruments for heat transfer in water and air side, and analyzes the degree that water temperature and pressure measurement influence heat transfer in water side, and the degree that wet bulb temperature difference measurement influences heat transfer in air side. Finally, this paper indicates that the key problem of reducing heat transfer in water side is water temperature measurement of the in-out pipe of heat-exchanger, and wet bulb temperature difference is a key to decrease the heat transfer in air side for finned-tube heat-exchanger. This paper gives a theoretical instruction for designing the measurement system of a finned-tube heat-exchanger test-board

Chen, Y.; Zhang, J.

2006-01-01T23:59:59.000Z

166

Understanding the effects of leakage in superconducting quantum error detection circuits  

E-Print Network (OSTI)

The majority of quantum error detection and correction protocols assume that the population in a qubit does not leak outside of its computational subspace. For many existing approaches, however, the physical qubits do possess more than two energy levels and consequently are prone to such leakage events. Analyzing the effects of leakage is therefore essential to devise optimal protocols for quantum gates, measurement, and error correction. In this work, we present a detailed study of leakage in a two-qubit superconducting stabilizer measurement circuit. We simulate the repeated ancilla-assisted measurement of a single $\\sigma^z$ operator for a data qubit, record the outcome at the end of each measurement cycle, and explore the signature of leakage events in the obtained readout statistics. An analytic model is also developed that closely approximates the results of our numerical simulations. We find that leakage leads to destructive features in the quantum error detection scheme, making additional hardware and software protocols necessary.

Joydip Ghosh; Austin G. Fowler; John M. Martinis; Michael R. Geller

2013-06-04T23:59:59.000Z

167

A self-checking fiber optic dosimeter for monitoring common errors in brachytherapy applications  

SciTech Connect

Scintillation dosimetry with optical fiber readout [fiber optic dosimetry (FOD)] requires accurate measurement of light intensity. It is therefore vulnerable to loss of calibration if any changes occur in the efficiency of the optical pathway between the scintillator and the light detector. The authors show in this article that common types of errors that arise during clinical use for brachytherapy applications can be quantified using a light emitting diode to stimulate the scintillator, the so-called LED-FOD method, in an integrated and easy-to-use control unit that incorporates a compact peripheral component interconnect extension for instrumentation. Common sources of error include bending and mechanical compression of the fiber optic components and changes in the temperature of the scintillator. The authors show that the method can detect all the common errors studied in this work and that different types of errors can result in different correlations between the LED stimulated signal and the brachytherapy source signal. For a single-type error the LED-FOD can be used easily for system diagnosis and validation with the possibility to correct the dosimeter reading if the correlation between the LED stimulated signal and the brachytherapy source signal can be defined. For more complex errors, resulting from two or more errors occurring simultaneously, the LED-FOD method can also allow the clinician to make a judgment on the reliability of the dosimeter reading. This self-checking method can enhance the clinical robustness of the FOD for achieving accurate dose control.

Yin, Y.; Lambert, J.; Yang, S.; McKenzie, D. R.; Jackson, M.; Suchowerska, N. [Physics School, University of Sydney, New South Wales 2006 (Australia); Physics School, University of Sydney, New South Wales 2006 (Australia) and Department of Radiation Oncology, Royal Prince Alfred Hospital, New South Wales 2050 (Australia); Physics School, University of Sydney, New South Wales 2006 (Australia); Department of Radiation Oncology, Royal Prince Alfred Hospital, New South Wales 2050 (Australia); Physics School, University of Sydney, New South Wales 2006 (Australia) and Department of Radiation Oncology, Royal Prince Alfred Hospital, New South Wales 2050 (Australia)

2009-07-15T23:59:59.000Z

168

Error Notification, Brookhaven National Laboratory (BNL)  

NLE Websites -- All DOE Office Websites (Extended Search)

Frequently Searched For Frequently Searched For Helpdesk Home Web Services BNL Site Index Can't View PDFs? Need Help Helpdesk Homepage Call the Helpdesk for 24x7 support Bus: 631.344.5522 Fax: 631-344-2140 Email: itdhelp@bnl.gov HTTP Error Forbidden: Page Access Rejected You are not authorized to view this page - This error is caused when the server has a list of IP addresses that are not allowed to access the site, and the IP address you are using is in this list. If the problem persists or if you believe you should be able to view this directory or page, please contact the Web server's administrator or call the Helpdesk by using the email address or phone number listed below. Some reasons for getting this notice: All people outside of the BNL Domain (130.199.0.0) will get this notice.

169

Improved Error Bounds for the Adiabatic Approximation  

E-Print Network (OSTI)

Since the discovery of adiabatic quantum computing, a need has arisen for rigorously proven bounds for the error in the adiabatic approximation. We present in this paper, a rigorous and elementary derivation of upper and lower bounds on the error incurred from using the adiabatic approximation for quantum systems. Our bounds are often asymptotically tight in the limit of slow evolution for fixed Hamiltonians, and are used to provide sufficient conditions for the application of the adiabatic approximation. We show that our sufficiency criteria exclude the Marzlin--Sanders counterexample from the class of Hamiltonians that obey the adiabatic approximation. Finally, we demonstrate the existence of classes of Hamiltonians that resemble the Marzlin--Sanders counterexample Hamiltonian, but also obey the adiabatic approximation.

Cheung, Donny; Wiebe, Nathan

2011-01-01T23:59:59.000Z

170

Error Notification, Brookhaven National Laboratory (BNL)  

NLE Websites -- All DOE Office Websites (Extended Search)

Frequently Searched For Frequently Searched For Helpdesk Home Application Services BNL Site Index Can't View PDFs? Need Help Helpdesk Homepage Call the Helpdesk for 24x7 support Bus: 631.344.5522 Fax: 631-344-2140 Email: itdhelp@bnl.gov HTTP Error Forbidden: Page Access Rejected You are not authorized to view this page - This error is caused when the server has a list of IP addresses that are not allowed to access the site, and the IP address you are using is in this list. If the problem persists or if you believe you should be able to view this directory or page, please contact the Web server's administrator or call the Helpdesk by using the email address or phone number listed below. Some reasons for getting this notice: All people outside of the BNL Domain (130.199.0.0) will get this notice.

171

Systematic errors in long baseline oscillation experiments  

Science Conference Proceedings (OSTI)

This article gives a brief overview of long baseline neutrino experiments and their goals, and then describes the different kinds of systematic errors that are encountered in these experiments. Particular attention is paid to the uncertainties that come about because of imperfect knowledge of neutrino cross sections and more generally how neutrinos interact in nuclei. Near detectors are planned for most of these experiments, and the extent to which certain uncertainties can be reduced by the presence of near detectors is also discussed.

Harris, Deborah A.; /Fermilab

2006-02-01T23:59:59.000Z

172

Minimal Achievable Error in the LED problem  

E-Print Network (OSTI)

This paper presents a theoretical model to predict the minimal achievable error, given a noise ratio #, in the LED data set problem. The motivation for developing this theoretical model is to understand and explain some of the results that di#erent systems achieve when they solve the LED problem. Moreover, given a new learning algorithm that solves the LED problem, we can now bound its optimal generalization accuracy.

Xavier Llora; Xavier Llora; David E. Goldberg; David E. Goldberg

2002-01-01T23:59:59.000Z

173

Sampling Errors of SSM/I and TRMM Rainfall Averages: Comparison with Error Estimates from Surface Data and a Simple Model  

Science Conference Proceedings (OSTI)

Quantitative use of satellite-derived maps of monthly rainfall requires some measure of the accuracy of the satellite estimates. The rainfall estimate for a given map grid box is subject to both remote sensing error and, especially in the case of ...

Thomas L. Bell; Prasun K. Kundu; Christian D. Kummerow

2001-05-01T23:59:59.000Z

174

Accounting for Model Errors in Ensemble Data Assimilation  

Science Conference Proceedings (OSTI)

This study addresses the issue of model errors with the ensemble Kalman filter. Observations generated from the NCEP–NCAR reanalysis fields are assimilated into a low-resolution AGCM. Without an effort to account for model errors, the performance ...

Hong Li; Eugenia Kalnay; Takemasa Miyoshi; Christopher M. Danforth

2009-10-01T23:59:59.000Z

175

Stability of error bounds for convex constraint systems in Banach ...  

E-Print Network (OSTI)

Jan 7, 2010 ... space X the error bound property is defined by the inequality ... is the error bound modulus [8]) (also known as conditioning rate [23]) of f at ¯x.

176

An Objective Method for Inferring Sources of Model Error  

Science Conference Proceedings (OSTI)

A restricted statistical correction (RSC) approach is introduced to assess the sources of error in general circulation models (GCMs). RSC models short-term forecast error by considering linear transformations of the GCM's forcing terms, which ...

Siegfried Schubert; Yehui Chang

1996-02-01T23:59:59.000Z

177

Prediction of Consensus Tropical Cyclone Track Forecast Error  

Science Conference Proceedings (OSTI)

The extent to which the tropical cyclone (TC) track forecast error of a consensus model (CONU) routinely used by the forecasters at the National Hurricane Center can be predicted is determined. A number of predictors of consensus forecast error, ...

James S. Goerss

2007-05-01T23:59:59.000Z

178

Hidden Error Variance Theory. Part I: Exposition and Analytic Model  

Science Conference Proceedings (OSTI)

A conundrum of predictability research is that while the prediction of flow-dependent error distributions is one of its main foci, chaos fundamentally hides flow-dependent forecast error distributions from empirical observation. Empirical ...

Craig H. Bishop; Elizabeth A. Satterfield

2013-05-01T23:59:59.000Z

179

Forecast-Error Statistics for Homogeneous and Inhomogeneous Observation Networks  

Science Conference Proceedings (OSTI)

Objective analysis procedures such as statistical interpolation require reliable estimates of forecast-error statistics in order to optimize the analysis weights. Reasonably good estimates of the forecast-error statistics can be obtained from ...

Roger Daley

1992-04-01T23:59:59.000Z

180

Human error contribution to nuclear materials-handling events  

E-Print Network (OSTI)

This thesis analyzes a sample of 15 fuel-handling events from the past ten years at commercial nuclear reactors with significant human error contributions in order to detail the contribution of human error to fuel-handling ...

Sutton, Bradley (Bradley Jordan)

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Zero-error capacity of a quantum channel  

E-Print Network (OSTI)

We define the quantum zero-error capacity, a new kind of classical capacity of a noisy quantum channel. Moreover, the necessary requirement for which a quantum channel has zero-error capacity greater than zero is also given.

Rex A. C. Medeiros; Francisco M. de Assis

2004-03-26T23:59:59.000Z

182

Distributed Forcing of Forecast and Assimilation Error Systems  

Science Conference Proceedings (OSTI)

Temporally distributed deterministic and stochastic excitation of the tangent linear forecast system governing forecast error growth and the tangent linear observer system governing assimilation error growth is examined. The method used is to ...

Brian F. Farrell; Petros J. Ioannou

2005-02-01T23:59:59.000Z

183

The Midlatitude Development of Regional Errors in a Global GCM  

Science Conference Proceedings (OSTI)

The growth of geographically confined errors is studied in six experiments with a five-level global spectral (rhomboidal 30) general circulation model. Each experiment consists of 36 identical twin integrations with the initial errors localized ...

David M. Straus

1993-08-01T23:59:59.000Z

184

Error Estimation Using Wavelet Analysis for Data Assimilation: EEWADAi  

Science Conference Proceedings (OSTI)

A new method is presented for estimating numerical errors in simulations as a function of space and time. This knowledge of numerical errors can provide critical information for the effective assimilation of external data. The new method utilizes ...

Leland Jameson; Takuji Waseda

2000-09-01T23:59:59.000Z

185

Session Cookie Error, Brookhaven National Laboratory (BNL)  

NLE Websites -- All DOE Office Websites (Extended Search)

Session Cookie Error Session Cookie Error We're Sorry, either you don't have Session Cookies enabled in your browser or your session has expired. Some functions in this site will not work properly without it enabled. Please enable session cookies, then go back and try again or close and re-open your browser to view these web pages correctly. What is a Cookie? What are Cookies used for? What are Persistent Cookies? What are Session Cookies? How can I control or enable which Cookies I want to accept? Need help? What is a Cookie? A "cookie" is a small piece of information that is sent by a web server to be stored on a web browser, so that it can later be read back from that browser the next time this unique visitor returns to that web server. This becomes useful for having the browser remember specific information about this visitor like location of their last visit, time spent, or user preferences (like style sheets). The cookie is a text file that is saved in the browser's directory and is stored in RAM while the browser is running. Also, the cookie may be stored on the computer's hard drive once you log off from that web site or web server.

186

Sensitivity of OFDM Systems to Synchronization Errors and Spatial Diversity  

E-Print Network (OSTI)

In this dissertation, the problem of synchronization for OFDM-based wireless communication systems is studied. In the first part of this dissertation, the sensitivity of both single input single output (SISO) OFDM and multiple input multiple output (MIMO) OFDM receivers to carrier and timing synchronization errors are analyzed. Analytical expressions and numerical results for the power of inter-carrier interference (ICI) are presented. It is shown that the OFDM-based receivers are quite sensitive to residual synchronization errors. In wide-sense stationary uncorrelated scattering (WSSUS) frequency-selective fading channels, the sampling clock timing offset results in rotation of the subcarrier constellation, while carrier frequency offsets and phase jitter cause inter-carrier interference. The overall system performance in terms of symbol error rate is limited by the inter-carrier interference. For a reliable information reception, compensatory measures must be taken. The second part of this dissertation deals with the impact of spatial diversity (usage of multiple transmit/receive antennas) on synchronization. It is found that with multiple transmit and receive antennas, MIMO-OFDM systems can take advantage of the spatial diversity to combat carrier and timing synchronization imperfections. Diversity can favorably improve the synchronization performance. Data-aided and non-data-aided maximum likelihood symbol timing estimators for MIMO-OFDM systems are introduced. Computer simulations show that, by exploiting the spatial diversity, synchronization performance of MIMO-OFDM systems in terms of mean squared error (MSE) of residual timing offset becomes significantly more reliable when compared to conventional SISO OFDM systems. Therefore, spatial diversity is a useful technique to be exploited in the deployment of MIMO-OFDM communication systems. In MIMO systems with synchronization sequences, timing synchronization is treated as a multiple hypotheses testing problem. Generalized likelihood ratio test (GLRT) statistics are developed for MIMO systems in frequency flat channels and MIMO-OFDM systems in frequency selective fading environments. The asymptotic performance of the GLRT without nuisance parameters is carried out. It is shown that the asymptotic performance of the GLRT can serve as an upper bound for the detection probability in the presence of a limited number of observations as well as a benchmark for comparing the performances of different timing synchronizers.

Zhou, Yi

2010-12-01T23:59:59.000Z

187

Verification of unfold error estimates in the UFO code  

SciTech Connect

Spectral unfolding is an inverse mathematical operation which attempts to obtain spectral source information from a set of tabulated response functions and data measurements. Several unfold algorithms have appeared over the past 30 years; among them is the UFO (UnFold Operator) code. In addition to an unfolded spectrum, UFO also estimates the unfold uncertainty (error) induced by running the code in a Monte Carlo fashion with prescribed data distributions (Gaussian deviates). In the problem studied, data were simulated from an arbitrarily chosen blackbody spectrum (10 keV) and a set of overlapping response functions. The data were assumed to have an imprecision of 5% (standard deviation). 100 random data sets were generated. The built-in estimate of unfold uncertainty agreed with the Monte Carlo estimate to within the statistical resolution of this relatively small sample size (95% confidence level). A possible 10% bias between the two methods was unresolved. The Monte Carlo technique is also useful in underdetemined problems, for which the error matrix method does not apply. UFO has been applied to the diagnosis of low energy x rays emitted by Z-Pinch and ion-beam driven hohlraums.

Fehl, D.L.; Biggs, F.

1996-07-01T23:59:59.000Z

188

Effects of uncertainties and errors on Lyapunov control  

E-Print Network (OSTI)

Lyapunov control (open-loop) is often confronted with uncertainties and errors in practical applications. In this paper, we analyze the robustness of Lyapunov control against the uncertainties and errors in quantum control systems. The analysis is carried out through examinations of uncertainties and errors, calculations of the control fidelity under influences of the certainties and errors, as well as discussions on the caused effects. Two examples, a closed control system and an open control system, are presented to illustrate the general formulism.

Yi, X X; Wu, Chunfeng; Oh, C H

2010-01-01T23:59:59.000Z

189

Semantic errors in SQL queries: a quite complete list  

Science Conference Proceedings (OSTI)

We investigate classes of SQL queries which are syntactically correct, but certainly not intended, no matter for which task the query was written. For instance, queries that are contradictory, i.e. always return the empty set, are obviously not intended. ... Keywords: SQL, SQL exams, bugs, database courses, databases, errors, logical errors, queries, semantic errors, software correctness, static analysis, teaching

Stefan Brass; Christian Goldberg

2006-05-01T23:59:59.000Z

190

Coded DNA Self-Assembly for Error Detection/Location  

Science Conference Proceedings (OSTI)

This paper proposes a novel framework in which DNA self-assembly can be analyzed for error detection/ location. The proposed framework relies on coding and mapping functions that allow to establish the presence of erroneous bonded tiles based on the ... Keywords: Coding, Nano Manufacturing, Error Detection, Error Resilience

Zahra Mashreghian Arani; Masoud Hashempour; Fabrizio Lombardi

2009-10-01T23:59:59.000Z

191

Unitary application of the quantum error correction codes  

E-Print Network (OSTI)

From the set of operators for errors and its correction code, we introduce the so-called complete unitary transformation. It can be used for encoding while the inverse of it can be applied for correcting the errors of the encoded qubit. We show that this unitary protocol can be applied for any code which satisfies the quantum error correction condition.

Xoaohua Wu; Bo You

2011-06-24T23:59:59.000Z

192

Reasoning about human error by modeling cognition and interaction  

E-Print Network (OSTI)

In this paper we focus on system resilience from the perspective of understanding human error. In particular, we consider systematic cognitive slips, including postcompletion errors, which are persistent, though infrequent. We outline the findings from empirical studies that have identified various factors that provoke or mitigate against such errors. We then describe approaches we are pursuing to encapsulate these insights in ways that can be re-used within system design. More broadly, we argue that an understanding of the factors that influence the likelihood of such errors can support organizations in designing systems and processes to minimize the likelihood of such errors.

Ann Blandford; Jonathan Back; Paul Curzon; Simon Y. W. Li; Rimvydas Ruksenas

2006-01-01T23:59:59.000Z

193

Asymmetric error field interaction with rotating conducting walls  

Science Conference Proceedings (OSTI)

The interaction of error fields with a system of differentially rotating conducting walls is studied analytically and compared to experimental data. Wall rotation causes eddy currents to persist indefinitely, attenuating and rotating the original error field. Superposition of error fields from external coils and plasma currents are found to break the symmetry in wall rotation direction. The vacuum and plasma eigenmodes are modified by wall rotation, with the error field penetration time decreased and the kink instability stabilized, respectively. Wall rotation is also predicted to reduce error field amplification by the marginally stable plasma.

Paz-Soldan, C.; Brookhart, M. I.; Hegna, C. C.; Forest, C. B. [Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States)

2012-07-15T23:59:59.000Z

194

Error minimizing algorithms for nearest eighbor classifiers  

SciTech Connect

Stack Filters define a large class of discrete nonlinear filter first introd uced in image and signal processing for noise removal. In recent years we have suggested their application to classification problems, and investigated their relationship to other types of discrete classifiers such as Decision Trees. In this paper we focus on a continuous domain version of Stack Filter Classifiers which we call Ordered Hypothesis Machines (OHM), and investigate their relationship to Nearest Neighbor classifiers. We show that OHM classifiers provide a novel framework in which to train Nearest Neighbor type classifiers by minimizing empirical error based loss functions. We use the framework to investigate a new cost sensitive loss function that allows us to train a Nearest Neighbor type classifier for low false alarm rate applications. We report results on both synthetic data and real-world image data.

Porter, Reid B [Los Alamos National Laboratory; Hush, Don [Los Alamos National Laboratory; Zimmer, G. Beate [TEXAS A& M

2011-01-03T23:59:59.000Z

195

Graphical Quantum Error-Correcting Codes  

E-Print Network (OSTI)

We introduce a purely graph-theoretical object, namely the coding clique, to construct quantum errorcorrecting codes. Almost all quantum codes constructed so far are stabilizer (additive) codes and the construction of nonadditive codes, which are potentially more efficient, is not as well understood as that of stabilizer codes. Our graphical approach provides a unified and classical way to construct both stabilizer and nonadditive codes. In particular we have explicitly constructed the optimal ((10,24,3)) code and a family of 1-error detecting nonadditive codes with the highest encoding rate so far. In the case of stabilizer codes a thorough search becomes tangible and we have classified all the extremal stabilizer codes up to 8 qubits.

Sixia Yu; Qing Chen; C. H. Oh

2007-09-12T23:59:59.000Z

196

Entanglement and Quantum Error Correction with Superconducting Qubits  

E-Print Network (OSTI)

A quantum computer will use the properties of quantum physics to solve certain computational problems much faster than otherwise possible. One promising potential implementation is to use superconducting quantum bits in the circuit quantum electrodynamics (cQED) architecture. There, the low energy states of a nonlinear electronic oscillator are isolated and addressed as a qubit. These qubits are capacitively coupled to the modes of a microwave-frequency transmission line resonator which serves as a quantum communication bus. Microwave electrical pulses are applied to the resonator to manipulate or measure the qubit state. State control is calibrated using diagnostic sequences that expose systematic errors. Hybridization of the resonator with the qubit gives it a nonlinear response when driven strongly, useful for amplifying the measurement signal to enhance accuracy. Qubits coupled to the same bus may coherently interact with one another via the exchange of virtual photons. A two-qubit conditional phase gate mediated by this interaction can deterministically entangle its targets, and is used to generate two-qubit Bell states and three-qubit GHZ states. These three-qubit states are of particular interest because they redundantly encode quantum information. They are the basis of the quantum repetition code prototypical of more sophisticated schemes required for quantum computation. Using a three-qubit Toffoli gate, this code is demonstrated to autonomously correct either bit- or phase-flip errors. Despite observing the expected behavior, the overall fidelity is low because of decoherence. A superior implementation of cQED replaces the transmission-line resonator with a three-dimensional box mode, increasing lifetimes by an order of magnitude. In-situ qubit frequency control is enabled with control lines, which are used to fully characterize and control the system Hamiltonian.

Matthew Reed

2013-11-26T23:59:59.000Z

197

Radiation-induced Soft Errors: A Chip-level Modeling Perspective  

Science Conference Proceedings (OSTI)

Chip-level soft-error rate (SER) estimation can come from two sources: direct experimental measurement and simulation. Because SER mitigation decisions need to be made very early in the product design cycle, long before product Si is available, a simulation-based ...

Norbert Seifert

2010-02-01T23:59:59.000Z

198

An Integrated Approach to Error Correction for Real-Time Radar-Rainfall Estimation  

Science Conference Proceedings (OSTI)

A procedure for estimating radar rainfall in real time consists of three main steps: 1) the measurement of reflectivity and removal of known sources of errors, 2) the conversion of the reflectivity to a rainfall rate (Z–R conversion), and 3) the ...

Siriluk Chumchean; Ashish Sharma; Alan Seed

2006-01-01T23:59:59.000Z

199

Evaluation of prediction error effects in wind energy-based electric vehicle charging  

Science Conference Proceedings (OSTI)

This paper first presents a battery operation scheduler for the sake of practical integration of wind energy generation and electric vehicle charging, and then measures its performance mainly focusing on the effect of wind speed prediction errors. The ... Keywords: battery operation scheduler, electric vehicle charging, renewable energy gain, smart grid, wind energy

Junghoon Lee, Gyung-Leen Park, Il-Woo Lee, Wan Ki Park

2013-10-01T23:59:59.000Z

200

Minimum error discrimination between similarity-transformed quantum states  

Science Conference Proceedings (OSTI)

Using the well-known necessary and sufficient conditions for minimum error discrimination (MED), we extract an equivalent form for the MED conditions. In fact, by replacing the inequalities corresponding to the MED conditions with an equivalent but more suitable and convenient identity, the problem of mixed state discrimination with optimal success probability is solved. Moreover, we show that the mentioned optimality conditions can be viewed as a Helstrom family of ensembles under some circumstances. Using the given identity, MED between N similarity transformed equiprobable quantum states is investigated. In the case that the unitary operators are generating a set of irreducible representation, the optimal set of measurements and corresponding maximum success probability of discrimination can be determined precisely. In particular, it is shown that for equiprobable pure states, the optimal measurement strategy is the square-root measurement (SRM), whereas for the mixed states, SRM is not optimal. In the case that the unitary operators are reducible, there is no closed-form formula in the general case, but the procedure can be applied in each case in accordance to that case. Finally, we give the maximum success probability of optimal discrimination for some important examples of mixed quantum states, such as generalized Bloch sphere m-qubit states, spin-j states, particular nonsymmetric qudit states, etc.

Jafarizadeh, M. A. [Department of Theoretical Physics and Astrophysics, University of Tabriz, Tabriz 51664 (Iran, Islamic Republic of); Institute for Studies in Theoretical Physics and Mathematics, Tehran 19395-1795 (Iran, Islamic Republic of); Research Institute for Fundamental Sciences, Tabriz 51664 (Iran, Islamic Republic of); Sufiani, R. [Department of Theoretical Physics and Astrophysics, University of Tabriz, Tabriz 51664 (Iran, Islamic Republic of); Institute for Studies in Theoretical Physics and Mathematics, Tehran 19395-1795 (Iran, Islamic Republic of); Mazhari Khiavi, Y. [Department of Theoretical Physics and Astrophysics, University of Tabriz, Tabriz 51664 (Iran, Islamic Republic of)

2011-07-15T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Measurement Science for Optimal Production Planning  

Science Conference Proceedings (OSTI)

... of this information is in various human-readable documents ... plans in a trial-and-error manner. ... developed to solve these problems, but measurement ...

2013-01-04T23:59:59.000Z

202

Merchant Commodity Storage and Term Structure Model Error  

E-Print Network (OSTI)

Merchants operations involves valuing and hedging the cash flows of commodity and energy conversion assets as real options based on stochastic models that inevitably embed model error. In this paper we quantify how empirically calibrated model errors about the futures price term structure affect the valuation and hedging of commodity storage assets, specifically the storage of natural gas, an important energy source. We also explore ways to mitigate the impact of these errors. Our analysis demonstrates the differential impact of term structure model error on natural gas storage valuation versus hedging. We also propose an effective approach to deal with the negative effect of such model error on factor hedging, a specific hedging approach. More generally, our work suggests managerial principles for option valuation and hedging in the presence of term structure model error. These principles should have relevance for the merchant management of other commodity conversion assets and for the management of financial options that also depend on term structure dynamics

Nicola Secom; Guoming Lai; François Margot; Alan Scheller-wolf

2011-01-01T23:59:59.000Z

203

Running jobs error: "inet_arp_address_lookup"  

NLE Websites -- All DOE Office Websites (Extended Search)

maintenance, users reporting get the error message similar as follows occassionaly: PE456:inetarpaddresslookup:Failed to read output of sbinarp -a -i ipogif0 command. Try...

204

Generic Error Model of Human-Robot Interaction  

E-Print Network (OSTI)

Wrong human-robot interactions are at the origin of severe damages. Safety requirements ask the analysis of these interactions. At first, erroneous interactions have to be identified. In this paper, we propose to use UML (Unified Modeling Language) to specify human robot interaction. Then, generic error models, associated with the message feature provided by UML, are presented. These error models allow interaction errors to be automatically deduced from the modeling of the human-robot interactions. The use of these generic error models is illustrated on a medical robot for teleechography.

J. Guiochet; et al.

2004-01-01T23:59:59.000Z

205

NIST Achieves Record-Low Error Rate for Quantum ...  

Science Conference Proceedings (OSTI)

... The horizontal and vertical lines separate gold electrodes, which are tuned to ... errors caused by instability in laser beam pointing and power, as well ...

2011-08-30T23:59:59.000Z

206

ERROR BOUNDS FOR VECTOR-VALUED FUNCTIONS ON ...  

E-Print Network (OSTI)

referred to the survey papers by Azé [2], Lewis & Pang [25], Pang [33], as well as the book by Auslender & Teboule [1]. Numerous characterizations of the error ...

207

Use of Quantum Error Coding in a 4-Blade Neutron ...  

Science Conference Proceedings (OSTI)

Use of Quantum Error Coding in a 4-Blade Neutron Interferometer. Summary: ... Figure 1: A schematic diagram of the 5-blade neutron interferometer. ...

2013-07-30T23:59:59.000Z

208

Historical Ocean Subsurface Temperature Analysis with Error Estimates  

Science Conference Proceedings (OSTI)

An objective analysis of monthly ocean subsurface temperatures from 1950 to 1998 is carried out. The analysis scheme and the results with estimated analysis errors are presented.

Masayoshi Ishii; Masahide Kimoto; Misako Kachi

2003-01-01T23:59:59.000Z

209

Errors in Radio Acoustic Sounding of Temperature  

Science Conference Proceedings (OSTI)

With the use of simultaneous correction for radial wind, the accuracy of radio acoustic sounding systems for the measurement of temperature has been substantially improved. The temperature accuracy can now be affected by a number of factors that ...

Wayne M. Angevine; W. L. Ecklund

1994-06-01T23:59:59.000Z

210

Analysis of Cloud Variability and Sampling Errors in Surface and Satellite Mesurements  

NLE Websites -- All DOE Office Websites (Extended Search)

Analysis of Cloud Variability and Sampling Errors in Analysis of Cloud Variability and Sampling Errors in Surface and Satellite Measurements Z. Li, M. C. Cribb, and F.-L. Chang Earth System Science Interdisciplinary Center University of Maryland College Park, Maryland A. P. Trishchenko and Y. Luo Canada Centre for Remote Sensing Ottawa, Ontario, Canada Introduction Radiation measurements have been widely employed for evaluating cloud parameterization schemes and model simulation results. As the most comprehensive program aiming to improve cloud parameteri- zation schemes, the Atmospheric Radiation Measurement (ARM) Program has an essential goal to make observations on the scale of a general circulation model gridbox, so as to define the physics underlying some of the important parameterizations in the general circulation models used in climate change

211

Errors in determination of soil water content using time-domain reflectometry caused by soil compaction around wave guides  

Science Conference Proceedings (OSTI)

Application of time domain reflectometry (TDR) in soil hydrology often involves the conversion of TDR-measured dielectric permittivity to water content using universal calibration equations (empirical or physically based). Deviations of soil-specific calibrations from the universal calibrations have been noted and are usually attributed to peculiar composition of soil constituents, such as high content of clay and/or organic matter. Although it is recognized that soil disturbance by TDR waveguides may have impact on measurement errors, to our knowledge, there has not been any quantification of this effect. In this paper, we introduce a method that estimates this error by combining two models: one that describes soil compaction around cylindrical objects and another that translates change in bulk density to evolution of soil water retention characteristics. Our analysis indicates that the compaction pattern depends on the mechanical properties of the soil at the time of installation. The relative error in water content measurement depends on the compaction pattern as well as the water content and water retention properties of the soil. Illustrative calculations based on measured soil mechanical and hydrologic properties from the literature indicate that the measurement errors of using a standard three-prong TDR waveguide could be up to 10%. We also show that the error scales linearly with the ratio of rod radius to the interradius spacing.

Ghezzehei, T.A.

2008-05-29T23:59:59.000Z

212

Improved measurement accuracy in a Long Trace Profiler: Compensation for laser pointing instability  

SciTech Connect

Laser pointing instability adds to the error of slope measurements taken with the Long Trace Profiler (LTP). As with carriage pitch error, this laser pointing error must be accounted for and subtracted from the surface under test (SUT) slope measurement. In the past, a separate reference beam (REF) allowed characterization of the component of slope error from carriage pitch. However, the component of slope error from laser pointing manifests itself differently in the SUT measured slope. An analysis of angle error propagation is given, and the effect of these errors on measured slope is determined. Then a method is proposed for identifying these errors and subtracting them from the measured SUT slope function. Separate measurements of carriage pitch and laser pointing instability isolate these effects, so that the effectiveness of the error identification algorithm may be demonstrated.

Irick, S.C.

1993-08-02T23:59:59.000Z

213

Creative Uses of Software Errors: Glitches and Cheats  

Science Conference Proceedings (OSTI)

Video games constitute a major sector of computing with distinctive social implications. Analysis of video game programming errors, design limitations, and rule ambiguities suggests a range of positive functions that glitches and cheats may perform. ... Keywords: cheat, computer, error, glitch, video game

Wilma Alice Bainbridge; William Sims Bainbridge

2007-02-01T23:59:59.000Z

214

Estimating Sampling Errors in Large-Scale Temperature Averages  

Science Conference Proceedings (OSTI)

A method is developed for estimating the uncertainty (standard error) of observed regional, hemispheric, and global-mean surface temperature series due to incomplete spatial sampling. Standard errors estimated at the grid-box level [SE2 = S2(1 ? ...

P. D. Jones; T. J. Osborn; K. R. Briffa

1997-10-01T23:59:59.000Z

215

Tangential residual as error estimator in the boundary element method  

Science Conference Proceedings (OSTI)

In this paper a new error estimator based on tangential derivative Boundary Integral Equation residuals for 2D Laplace and Helmholtz equations is shown. The direct problem for general mixed boundary conditions is solved using standard and hypersingular ... Keywords: Adaptivity, Boundary Integral Equation residual, Boundary element method, Error estimation, Mesh adaptation, Mesh refinement, Nodal sensitivity

Alejandro E. Martínez-Castro; Rafael Gallego

2005-04-01T23:59:59.000Z

216

Error estimates for the numerical approximation of Neumann control problems  

Science Conference Proceedings (OSTI)

We continue the discussion of error estimates for the numerical analysis of Neumann boundary control problems we started in Casas et al. (Comput. Optim. Appl. 31:193-219, 2005). In that paper piecewise constant functions were used to approximate the ... Keywords: boundary control, error estimates, numerical approximation, semilinear elliptic equation

Eduardo Casas; Mariano Mateos

2008-04-01T23:59:59.000Z

217

Multistrategy Discovery and Detection of Novice Programmer Errors  

Science Conference Proceedings (OSTI)

Detecting and diagnosing errors in novice behavior is an important student modeling task. In this paper, we describe MEDD, an unsupervised incremental multistrategy system for the discovery of classes of errors from, and their detection in, novice programs. ... Keywords: conceptual clustering, multistrategy learning, student modeling, unsupervised learning

Raymund C. Sison; Masayuki Numao; Masamichi Shimura

2000-01-01T23:59:59.000Z

218

Soft Error Vulnerability of Iterative Linear Algebra Methods  

Science Conference Proceedings (OSTI)

Devices become increasingly vulnerable to soft errors as their feature sizes shrink. Previously, soft errors primarily caused problems for space and high-atmospheric computing applications. Modern architectures now use features so small at sufficiently low voltages that soft errors are becoming significant even at terrestrial altitudes. The soft error vulnerability of iterative linear algebra methods, which many scientific applications use, is a critical aspect of the overall application vulnerability. These methods are often considered invulnerable to many soft errors because they converge from an imprecise solution to a precise one. However, we show that iterative methods can be vulnerable to soft errors, with a high rate of silent data corruptions. We quantify this vulnerability, with algorithms generating up to 8.5% erroneous results when subjected to a single bit-flip. Further, we show that detecting soft errors in an iterative method depends on its detailed convergence properties and requires more complex mechanisms than simply checking the residual. Finally, we explore inexpensive techniques to tolerate soft errors in these methods.

Bronevetsky, G; de Supinski, B

2007-12-15T23:59:59.000Z

219

Network protocols: correcting transmission errors of up to two bits  

Science Conference Proceedings (OSTI)

While the construction of Hamming Codes that can detect and correct 1-bit transmission errors has been illustrated [1], Hamming Codes that will detect and correct transmission errors of more than 1 bit remain yet to be constructed. In this paper, ...

Sei-Jong Chung

2003-12-01T23:59:59.000Z

220

Design error diagnosis and correction in digital circuits  

E-Print Network (OSTI)

As the design of digital systems is becoming Micrographics. increasingly complex, an undetected design error in the late phase of the design process may have catastrophic consequences. It is thus very important to discover these design errors as early as and efficient way. Simulation and tautology possible, and to correct them in a fast checking can be used for design verification. Their role is only to decide whether the design is correct or not. But when the existence of an error is detected, further mechanized help is needed to and the error correction. Though error diagnosis methods based on simulation are simple and fast, they are not considered accurate enough to be used for error correction. Symbolic methods based on Binary Decision Diagrams (BDDs) are accurate enough to be used both for diagnosis and correction, but they have limited applicability due to the memory explosion problem associated with BDDS. This work presents a simulation-based error correction procedure, which can efficiently overcome the limitations of a symbolic error correction method without sacrificing much accuracy.

Nayak, Debashis

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

How to communicate unit error messages in spreadsheets  

E-Print Network (OSTI)

In previous work we have designed and implemented an automatic reasoning system for spreadsheets, called UCheck, that infers unit information for cells in a spreadsheet. Based on this unit information, UCheck can identify cells in the spreadsheet that contain erroneous formulas. However, the information about an erroneous cell is reported to the user currently in a rather crude way by simply coloring the cell, which does not tell anything about the nature of error and thus offers no help to the user as to how to fix it. In this paper we describe an extension of UCheck, called UFix, which improves the error messages reported to the spreadsheet user dramatically. The approach essentially consists of three steps: First, we identify different categories of spreadsheet errors from an end-user’s perspective. Second, we map units that indicate erroneous formulas to these error categories. Finally, we create customized error messages from the unit information and the identified error category. In many cases, these error messages also provide suggestions on how to fix the reported errors.

Robin Abraham; Martin Erwig

2005-01-01T23:59:59.000Z

222

Analyzing localization errors in one-dimensional sensor networks  

Science Conference Proceedings (OSTI)

One-dimensional sensor networks can be found in many fields and demand node location information for various applications. Developing localization algorithms in one-dimensional sensor networks is trivial, due to the fact that existing localization algorithms ... Keywords: Cramér-Rao lower bound, Error propagation, Estimation errors, Localization, One-dimensional sensor networks

Baoqi Huang; Changbin Yu; Brian D. O. Anderson

2012-02-01T23:59:59.000Z

223

PROPANE: An Environment for Examining the Propagation of Errors  

E-Print Network (OSTI)

In order to produce reliable software, it is important to have knowledge on how faults and errors may affect the software. In particular, designing efficient error detection mechanisms requires not only knowledge on which types of errors to detect but also the effect these errors may have on the software as well as how they propagate through the software. This paper presents the Propagation Analysis Environment (PROPANE) which is a tool for profiling and conducting fault injection experiments on software running on desktop computers. PROPANE supports the injection of both software faults (by mutation of source code) and data errors (by manipulating variable and memory contents). PROPANE supports various error types out-of-the-box and has support for user-defined error types. For logging, probes are provided for charting the values of variables and memory areas as well as for registering events during execution of the system under test. PROPANE has a flexible design making it useful for development of a wide range of software systems, e.g., embedded software, generic software components, or user-level desktop applications. We show examples of results obtained using PROPANE and how these can guide software developers to where software error detection and recovery could increase the reliability of the software system.

Martin Hiller; Arshad Jhumka; Neeraj Suri

2002-01-01T23:59:59.000Z

224

Type error slicing in implicitly typed higher-order languages  

Science Conference Proceedings (OSTI)

Previous methods have generally identified the location of a type error as a particular program point or the program subtree rooted at that point. We present a new approach that identifies the location of a type error as a set of program points (a slice) ...

Christian Haack; J. B. Wells

2003-04-01T23:59:59.000Z

225

Discriminative sum types locate the source of type errors  

Science Conference Proceedings (OSTI)

We propose a type system for locating the source of type errors in an applied lambda calculus with ML-style polymorphism. The system is based on discriminative sum types---known from work on soft typing---with annotation subtyping and recursive types. ... Keywords: polymorphism, type errors, type inference

Matthias Neubauer; Peter Thiemann

2003-08-01T23:59:59.000Z

226

An Efficient Approach towards Mitigating Soft Errors Risks  

E-Print Network (OSTI)

Smaller feature size, higher clock frequency and lower power consumption are of core concerns of today's nano-technology, which has been resulted by continuous downscaling of CMOS technologies. The resultant 'device shrinking' reduces the soft error tolerance of the VLSI circuits, as very little energy is needed to change their states. Safety critical systems are very sensitive to soft errors. A bit flip due to soft error can change the value of critical variable and consequently the system control flow can completely be changed which leads to system failure. To minimize soft error risks, a novel methodology is proposed to detect and recover from soft errors considering only 'critical code blocks' and 'critical variables' rather than considering all variables and/or blocks in the whole program. The proposed method shortens space and time overhead in comparison to existing dominant approaches.

Sadi, Muhammad Sheikh; Uddin, Md Nazim; Jürjens, Jan

2011-01-01T23:59:59.000Z

227

A Direct Measure of Entrainment  

Science Conference Proceedings (OSTI)

A method is introduced for directly measuring convective entrainment and detrainment in a cloud-resolving simulation. This technique is used to quantify the errors in the entrainment and detrainment estimates obtained using the standard bulk-...

David M. Romps

2010-06-01T23:59:59.000Z

228

Hidden Error Variance Theory. Part II: An Instrument That Reveals Hidden Error Variance Distributions from Ensemble Forecasts and Observations  

Science Conference Proceedings (OSTI)

In Part I of this study, a model of the distribution of true error variances given an ensemble variance is shown to be defined by six parameters that also determine the optimal weights for the static and flow-dependent parts of hybrid error ...

Craig H. Bishop; Elizabeth A. Satterfield; Kevin T. Shanley

2013-05-01T23:59:59.000Z

229

FRamework Assessing Notorious Contributing Influences for Error (FRANCIE): Perspective on Taxonomy Development to Support Error Reporting and Analysis  

Science Conference Proceedings (OSTI)

Beginning in the 1980s a primary focus of human reliability analysis was estimation of human error probabilities. However, detailed qualitative modeling with comprehensive representation of contextual variables often was lacking. This was likely due to the lack of comprehensive error and performance shaping factor taxonomies, and the limited data available on observed error rates and their relationship to specific contextual variables. In the mid 90s Boeing, America West Airlines, NASA Ames Research Center and INEEL partnered in a NASA sponsored Advanced Concepts grant to: assess the state of the art in human error analysis, identify future needs for human error analysis, and develop an approach addressing these needs. Identified needs included the need for a method to identify and prioritize task and contextual characteristics affecting human reliability. Other needs identified included developing comprehensive taxonomies to support detailed qualitative modeling and to structure meaningful data collection efforts across domains. A result was the development of the FRamework Assessing Notorious Contributing Influences for Error (FRANCIE) with a taxonomy for airline maintenance tasks. The assignment of performance shaping factors to generic errors by experts proved to be valuable to qualitative modeling. Performance shaping factors and error types from such detailed approaches can be used to structure error reporting schemes. In a recent NASA Advanced Human Support Technology grant FRANCIE was refined, and two new taxonomies for use on space missions were developed. The development, sharing, and use of error taxonomies, and the refinement of approaches for increased fidelity of qualitative modeling is offered as a means to help direct useful data collection strategies.

Lon N. Haney; David I. Gertman

2003-04-01T23:59:59.000Z

230

Error Detection, Factorization and Correction for Multi-View Scene Reconstruction from Aerial Imagery  

SciTech Connect

Scene reconstruction from video sequences has become a prominent computer vision research area in recent years, due to its large number of applications in fields such as security, robotics and virtual reality. Despite recent progress in this field, there are still a number of issues that manifest as incomplete, incorrect or computationally-expensive reconstructions. The engine behind achieving reconstruction is the matching of features between images, where common conditions such as occlusions, lighting changes and texture-less regions can all affect matching accuracy. Subsequent processes that rely on matching accuracy, such as camera parameter estimation, structure computation and non-linear parameter optimization, are also vulnerable to additional sources of error, such as degeneracies and mathematical instability. Detection and correction of errors, along with robustness in parameter solvers, are a must in order to achieve a very accurate final scene reconstruction. However, error detection is in general difficult due to the lack of ground-truth information about the given scene, such as the absolute position of scene points or GPS/IMU coordinates for the camera(s) viewing the scene. In this dissertation, methods are presented for the detection, factorization and correction of error sources present in all stages of a scene reconstruction pipeline from video, in the absence of ground-truth knowledge. Two main applications are discussed. The first set of algorithms derive total structural error measurements after an initial scene structure computation and factorize errors into those related to the underlying feature matching process and those related to camera parameter estimation. A brute-force local correction of inaccurate feature matches is presented, as well as an improved conditioning scheme for non-linear parameter optimization which applies weights on input parameters in proportion to estimated camera parameter errors. Another application is in reconstruction pre-processing, where an algorithm detects and discards frames that would lead to inaccurate feature matching, camera pose estimation degeneracies or mathematical instability in structure computation based on a residual error comparison between two different match motion models. The presented algorithms were designed for aerial video but have been proven to work across different scene types and camera motions, and for both real and synthetic scenes.

Hess-Flores, M

2011-11-10T23:59:59.000Z

231

Deriving Human-Error Tolerance Requirements from Tasks  

E-Print Network (OSTI)

In this paper we show how an understanding of a dynamic system from the point of view of the tasks that it supports and an understanding of human error can guide a process of deriving human error tolerance requirements. Our aim is to provide a means whereby, rather than relying on training as a means of improving operator performance, designers may develop interactive systems with human error tolerance in mind. We extend an established methodology (SHARP) by employing a software engineering notation (CSP) that provides a bridge between a theory of error and the practice of design and implementation. In this paper we outline approaches to human error, describe a task notation based on CSP which helps us to elicit requirements on human-error tolerance expressed as functional properties of the system. The technique is used to analyse an engine fire recovery procedure in order to derive human error tolerance requirements. 1 Introduction Walk-up-and-use systems, such as automated teller ma...

Peter Wright; Bob Fields; Michael Harrison

1994-01-01T23:59:59.000Z

232

Wind Power Forecasting Error Distributions: An International Comparison; Preprint  

DOE Green Energy (OSTI)

Wind power forecasting is expected to be an important enabler for greater penetration of wind power into electricity systems. Because no wind forecasting system is perfect, a thorough understanding of the errors that do occur can be critical to system operation functions, such as the setting of operating reserve levels. This paper provides an international comparison of the distribution of wind power forecasting errors from operational systems, based on real forecast data. The paper concludes with an assessment of similarities and differences between the errors observed in different locations.

Hodge, B. M.; Lew, D.; Milligan, M.; Holttinen, H.; Sillanpaa, S.; Gomez-Lazaro, E.; Scharff, R.; Soder, L.; Larsen, X. G.; Giebel, G.; Flynn, D.; Dobschinski, J.

2012-09-01T23:59:59.000Z

233

High-resolution Thomson scattering system on the COMPASS tokamak: Evaluation of plasma parameters and error analysis  

SciTech Connect

The electron density and temperature profiles measured by the Thomson scattering diagnostic on the COMPASS tokamak are used for estimation of electron kinetic energy, energy confinement time, and effective charge number Z{sub eff}. Data are compared with the line-integrated electron density measured by a microwave interferometer in an ohmically heated plasma with a circular cross section. An error analysis of both electron temperature and density are performed by two methods-a constant chi-square boundaries method and a Monte Carlo simulation, determining asymmetrical error bars for the electron temperature.

Aftanas, M. [Institute of Plasma Physics AS CR, v.v.i., Za Slovankou 3, 182 00 Prague 8 (Czech Republic); Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16 Prague 2 (Czech Republic); Bohm, P.; Bilkova, P.; Weinzettl, V.; Zajac, J.; Zacek, F.; Stockel, J.; Hron, M.; Panek, R. [Institute of Plasma Physics AS CR, v.v.i., Za Slovankou 3, 182 00 Prague 8 (Czech Republic); Scannell, R. [Culham Centre for Fusion Energy, Culham Science Centre, Abingdon, Oxfordshire OX14 3DB (United Kingdom); Walsh, M. J. [ITER Organization, CS 90 046, St Paul lez Durance Cedex 13067 (France)

2012-10-15T23:59:59.000Z

234

Error 401 on upload? | OpenEI Community  

Open Energy Info (EERE)

Error 401 on upload? Error 401 on upload? Home > Groups > Databus Hi, I get an HTTP error 401 when trying to upload data. My first thought is that this is related to the robot's credentials, but I've checked that carefully; robot is in a group with access to the table, etc. Is there something else that can cause error 401? thanks, Submitted by Hopcroft on 23 September, 2013 - 13:02 1 answer Points: 0 uploading data using the GUI (csv upload button) or uploading data using json? What type of access does the group have to the database? Try adding the robot to the group directly as well as a work around and let me know what happens(we have people using the robots but perhaps there is an issue somewhere). Is your user and your api key working at all? (your user key is in the help section System Access on your version of databus). Deanhiller

235

Representation Error of Oceanic Observations for Data Assimilation  

Science Conference Proceedings (OSTI)

A simple approach to the estimation of representation error (RE) of sea level (?), temperature (T), and salinity (S) observations for ocean data assimilation is described. It is assumed that the main source of RE is due to unresolved processes ...

Peter R. Oke; Pavel Sakov

2008-06-01T23:59:59.000Z

236

Weather Regimes and Forecast Errors in the Pacific Northwest  

Science Conference Proceedings (OSTI)

Despite overall improvements in numerical weather prediction and data assimilation, large short-term forecast errors of sea level pressure and 2-m temperature still occur. This is especially true for the west coast of North America where short-...

Lynn A. McMurdie; Joseph H. Casola

2009-06-01T23:59:59.000Z

237

Error 401 on upload? | OpenEI Community  

Open Energy Info (EERE)

Error 401 on upload? Error 401 on upload? Home > Groups > Databus Hi, I get an HTTP error 401 when trying to upload data. My first thought is that this is related to the robot's credentials, but I've checked that carefully; robot is in a group with access to the table, etc. Is there something else that can cause error 401? thanks, Submitted by Hopcroft on 23 September, 2013 - 13:02 1 answer Points: 0 uploading data using the GUI (csv upload button) or uploading data using json? What type of access does the group have to the database? Try adding the robot to the group directly as well as a work around and let me know what happens(we have people using the robots but perhaps there is an issue somewhere). Is your user and your api key working at all? (your user key is in the help section System Access on your version of databus). Deanhiller

238

US-LHC IR magnet error analysis and compensation  

SciTech Connect

This paper studies the impact of the insertion-region (IR) magnet field errors on LHC collision performance. Compensation schemes including magnet orientation optimization, body-end compensation, tuning shims, and local nonlinear correction are shown to be highly effective.

Wei, J.; Ptitsin, V.; Pilat, F.; Tepikian, S. [Brookhaven National Lab., Upton, NY (United States); Gelfand, N.; Wan, W.; Holt, J. [Fermi National Accelerator Lab., Batavia, IL (United States)

1998-08-01T23:59:59.000Z

239

Underestimating Costs in Public Works Projects: Error or Lie?  

E-Print Network (OSTI)

J. M. (1964). Errors in project cost estimates. Indian Eco-leave out important project costs and risks in order to makeclearly, comparing actual project costs with esti- mated

Flyvbjerg, Bent; Holm, Mette Skamris; Buhl, Søren

2006-01-01T23:59:59.000Z

240

A Preliminary Investigation of Temperature Errors in Operational Forecasting Models  

Science Conference Proceedings (OSTI)

Temperatures taken from model output (FOUS reports) routinely transmitted by the National Centers for Environmental Prediction are tabulated to determine errors during three months in the summer of 1996. These short-term model forecasts are ...

Frank P. Colby Jr.

1998-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

ATLAS Self-Siphoning Rain Gauge Error Estimates  

Science Conference Proceedings (OSTI)

This report describes sampling and error characteristics of self-siphoning rain gauges used on moored buoys designed and assembled at NOAA's Pacific Marine Environmental Laboratory (PMEL) for deployment in the tropical Pacific and Atlantic Oceans ...

Yolande L. Serra; Patrick A'Hearn; H. Paul Freitag; Michael J. McPhaden

2001-12-01T23:59:59.000Z

242

Probabilistic state estimation in regimes of nonlinear error growth  

E-Print Network (OSTI)

State estimation, or data assimilation as it is often called, is a key component of numerical weather prediction (NWP). Nearly all implementable methods of state estimation suitable for NWP are forced to assume that errors ...

Lawson, W. Gregory, 1975-

2005-01-01T23:59:59.000Z

243

Toward Estimating Climatic Trends in SST. Part II: Random Errors  

Science Conference Proceedings (OSTI)

Random observational errors for sea surface temperature (SST) are estimated using merchant ship reports from the International Comprehensive Ocean–Atmosphere Data Set (ICOADS) for the period of 1970–97. A statistical technique, semivariogram ...

Elizabeth C. Kent; Peter G. Challenor

2006-03-01T23:59:59.000Z

244

Wind Power Forecasting Error Distributions over Multiple Timescales: Preprint  

DOE Green Energy (OSTI)

In this paper, we examine the shape of the persistence model error distribution for ten different wind plants in the ERCOT system over multiple timescales. Comparisons are made between the experimental distribution shape and that of the normal distribution.

Hodge, B. M.; Milligan, M.

2011-03-01T23:59:59.000Z

245

EVAL: Utilizing processors with variation-induced timing errors  

Science Conference Proceedings (OSTI)

Parameter variation in integrated circuits causes sections of a chip to be slower than others. If, to prevent any resulting timing errors, we design processors for worst-case parameter values, we may lose substantial performance. An alternate approach ...

Smruti Sarangi; Brian Greskamp; Abhishek Tiwari; Josep Torrellas

2008-11-01T23:59:59.000Z

246

Stratospheric Analysis and Forecast Errors Using Hybrid and Sigma Coordinates  

Science Conference Proceedings (OSTI)

Past investigations have documented large divergent wind anomalies in stratospheric reanalyses over steep terrain, which were attributed to discretization errors produced by the terrain-following (sigma) vertical coordinate in the forecast model. ...

Stephen D. Eckermann; John P. McCormack; Jun Ma; Timothy F. Hogan; Katherine A. Zawdie

247

Singular Vector Calculations with an Analysis Error Variance Metric  

Science Conference Proceedings (OSTI)

Singular vectors of the navy's global forecast model are calculated using an initial norm consistent with an estimate of analysis error variance provided by the Naval Research Laboratory's (NRL) Atmospheric Variational Data Assimilation System (...

Ronald Gelaro; Thomas Rosmond; Roger Daley

2002-05-01T23:59:59.000Z

248

Annotating language errors in texts: investigating argumentation and decision schemas  

Science Conference Proceedings (OSTI)

In this short paper, we present annotations for tagging grammatical and stylistic errors, together with attributes about the nature of the correction which are then interpreted as arguments. A decision model is introduced in order for the author to be ...

Camille Albert; Laurie Buscail; Marie Garnier; Arnaud Rykner; Patrick Saint-Dizier

2009-08-01T23:59:59.000Z

249

Vertical Correlation Functions for Temperature and Relative Humidity Errors  

Science Conference Proceedings (OSTI)

This article gives the details and results of an investigation into the properties of the temperature and relative humidity errors from the Navy Operational Global Atmospheric Prediction System for a 4-month period from March to June 1998. The ...

Richard Franke; Edward Barker

2000-12-01T23:59:59.000Z

250

Servo control booster system for minimizing following error  

DOE Patents (OSTI)

A closed-loop feedback-controlled servo system is disclosed which reduces command-to-response error to the system's position feedback resolution least increment, .DELTA.S.sub.R, on a continuous real-time basis for all operating speeds. The servo system employs a second position feedback control loop on a by exception basis, when the command-to-response error .gtoreq..DELTA.S.sub.R, to produce precise position correction signals. When the command-to-response error is less than .DELTA.S.sub.R, control automatically reverts to conventional control means as the second position feedback control loop is disconnected, becoming transparent to conventional servo control means. By operating the second unique position feedback control loop used herein at the appropriate clocking rate, command-to-response error may be reduced to the position feedback resolution least increment. The present system may be utilized in combination with a tachometer loop for increased stability.

Wise, William L. (Mountain View, CA)

1985-01-01T23:59:59.000Z

251

A Cautionary Note on the Use of Error Bars  

Science Conference Proceedings (OSTI)

Climate studies often involve comparisons between estimates of some parameter derived from different observed and/or model-generated datasets. It is common practice to present estimates of two or more statistical quantities with error bars about ...

John R. Lanzante

2005-09-01T23:59:59.000Z

252

An Error Analysis of Atlantic Tropical Cyclone Track Guidance Models  

Science Conference Proceedings (OSTI)

Mean track forecast errors over the 6-yr period 1983–88 are compared for four tropical cyclone-track forecast models in use at the National Hurricane Center (NHC). The model types represented are statistical, statistical-dynamical, barctropic-...

Mark Demaria; Miles B. Lawrence; James T. Kroll

1990-03-01T23:59:59.000Z

253

Some Characteristics of Time Interpolation Errors for Fluid Flows  

Science Conference Proceedings (OSTI)

The size of errors due to linear time interpolation varies parabolically with a maximum at the center of the interpolation interval in most of the cases examined here. These cases include simple situations that are analyzed analytically and ...

Ross N. Hoffman; S. Mark Leidner

2010-07-01T23:59:59.000Z

254

Optimal complexity correction of correlated errors in the surface code  

E-Print Network (OSTI)

The surface code is designed to suppress errors in quantum computing hardware and currently offers the most believable pathway to large-scale quantum computation. The surface code requires a 2-D array of nearest-neighbor coupled qubits that are capable of implementing a universal set of gates with error rates below approximately 1%, requirements compatible with experimental reality. Consequently, a number of authors are attempting to squeeze additional performance out of the surface code. We describe an optimal complexity error suppression algorithm, parallelizable to O(1) given constant computing resources per unit area, and provide evidence that this algorithm exploits correlations in the error models of each gate in an asymptotically optimal manner.

Austin G. Fowler

2013-10-02T23:59:59.000Z

255

Correcting Errors in Streamflow Forecast Ensemble Mean and Spread  

Science Conference Proceedings (OSTI)

When hydrological models are used for probabilistic streamflow forecasting in the Ensemble Streamflow Prediction (ESP) framework, the deterministic components of the approach can lead to errors in the estimation of forecast uncertainty, as ...

Andrew W. Wood; John C. Schaake

2008-02-01T23:59:59.000Z

256

Evaluating Error Propagation in Coupled Land–Atmosphere Models  

Science Conference Proceedings (OSTI)

This study examines how land-use errors from the Land Transformation Model (LTM) propagate through to climate as simulated by the Regional Atmospheric Model System (RAMS). The authors conducted five simulations of regional climate over East Africa:...

Bryan Pijanowski; Nathan Moore; Dasaraden Mauree; Dev Niyogi

2011-10-01T23:59:59.000Z

257

The uncertainties in estimating measurement uncertainties  

SciTech Connect

All measurements include some error. Whether measurements are used for accountability, environmental programs or process support, they are of little value unless accompanied by an estimate of the measurements uncertainty. This fact is often overlooked by the individuals who need measurements to make decisions. This paper will discuss the concepts of measurement, measurements errors (accuracy or bias and precision or random error), physical and error models, measurement control programs, examples of measurement uncertainty, and uncertainty as related to measurement quality. Measurements are comparisons of unknowns to knowns, estimates of some true value plus uncertainty; and are no better than the standards to which they are compared. Direct comparisons of unknowns that match the composition of known standards will normally have small uncertainties. In the real world, measurements usually involve indirect comparisons of significantly different materials (e.g., measuring a physical property of a chemical element in a sample having a matrix that is significantly different from calibration standards matrix). Consequently, there are many sources of error involved in measurement processes that can affect the quality of a measurement and its associated uncertainty. How the uncertainty estimates are determined and what they mean is as important as the measurement. The process of calculating the uncertainty of a measurement itself has uncertainties that must be handled correctly. Examples of chemistry laboratory measurement will be reviewed in this report and recommendations made for improving measurement uncertainties.

Clark, J.P.; Shull, A.H.

1994-07-01T23:59:59.000Z

258

Human Operational Errors Involving Control, Relay, and Auxiliary Equipment  

Science Conference Proceedings (OSTI)

This report describes the objectives, information gathering and analysis, and findings of a research effort related to human operational errors involving control, relay, and auxiliary equipment. This research is conducted by the Switching Safety and Reliability Project of EPRI8217s Substations Program. The project consists of three separate studies: 8226 an analysis of relay-related incidents attributed to human errors, 8226 a compilation of work practices when planning and performing work on relays, an...

2006-12-08T23:59:59.000Z

259

Human Error Mitigation in Future Operations Control Centers  

E-Print Network (OSTI)

This report documents a human error mitigation study conducted at the William J. Hughes Technical Center Research Development & Human Factors Laboratory. The study examined potential causes of human errors in future Airway Facilities (AF) operations control centers (OCCs). The participants consisted of nine specialists having expertise in current AF operations and knowledge of human error tendencies. The participants explored four operational scenarios, identified potential sources of error, and recommended specific solutions. A research team extracted common themes from participant responses to each of the four scenarios and identified general sources of potential error. They made specific recommendations for mitigating error in future OCC facilities. 17. Key Words NIMS, operations control centers, fault management, errors, human factors, event ticketing 18. Distribution Statement This document is available to the public through the National Technical Information Service, Springfield, Virginia, 22161 19. Security Classif. (of this report) 20. Security Classif. (of this page) 21. No. of Pages 48 22. Price Form DOT F 1700.7 (8-72) Reproduction of completed page authorized iii Acknowledgments This research would not have been possible without the support and sponsorship of AAR-100, the Office of the Chief Scientific and Technical Advisor for Human Factors. The research team greatly appreciated the outstanding support provided by Jack Oxford, FDC, who headed the effort to develop futuristic scenarios and to recruit participants. Dan Wagner and Armida Rosiles, ACT-530, and Anton Koros, FDC, played important roles in the completion of this study. Subject matter experts who supported scenario development included Patrick Marable, Kermit Grayson, and William Bauerle...

Vicki Ahlstrom, Ph.D.; Yvette J Tenney; Richard W. Pew; Robert L. Cranston; Richard Mogford, Ph.D.; Author(s Vicki Ahlstrom (act; Jean MacMillen; Jean Macmillan; Yvette Tenney; Richard Pew

1999-01-01T23:59:59.000Z

260

Implement Robotic Mass Measurements in SP250 Services  

Science Conference Proceedings (OSTI)

... services will dramatically reduce the turnaround time for mass measurement services by a predicted factor of four, eliminate human errors and other ...

2012-05-30T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Hall-Héroult Cell: Processes Modeling and Measurements  

Science Conference Proceedings (OSTI)

Feb 17, 2010 ... The thermal balance has a direct impact in current efficiency, however its measures are subjected to hardware and human errors, and normally ...

262

Analysis and Reduction of Systematic Errors through a Seamless Approach to Modeling Weather and Climate  

Science Conference Proceedings (OSTI)

The reduction of systematic errors is a continuing challenge for model development. Feedbacks and compensating errors in climate models often make finding the source of a systematic error difficult. In this paper, it is shown how model ...

G. M. Martin; S. F. Milton; C. A. Senior; M. E. Brooks; S. Ineson; T. Reichler; J. Kim

2010-11-01T23:59:59.000Z

263

Estimating Model-Error Covariances for Application to Atmospheric Data Assimilation  

Science Conference Proceedings (OSTI)

Forecast-error statistics have traditionally been used to investigate model performance and to calculate analysis weights for atmospheric data assimilation. Forecast error has two components: the model error, caused by model imperfections, and ...

Roger Daley

1992-08-01T23:59:59.000Z

264

Assessing the Impact of Differential Genotyping Errors on Rare Variant Tests of Association  

E-Print Network (OSTI)

Genotyping errors are well-known to impact the power and type I error rate in single marker tests of association. Genotyping errors that happen according to the same process in cases and controls are known as non-differential ...

Fast, Shannon Marie

265

A Practical Approach to Sequential Estimation of Systematic Error on Near-Surface Mesoscale Grids  

Science Conference Proceedings (OSTI)

Statistical analysis arguments are used to construct an estimation algorithm for systematic error of near-surface temperatures on a mesoscale grid. The systematic error is defined as the observed running-mean error, and an averaging length of 7 ...

Joshua P. Hacker; Daran L. Rife

2007-12-01T23:59:59.000Z

266

Multi-vector tests: a path to perfect error-rate testing  

Science Conference Proceedings (OSTI)

The importance of testing approaches that exploit error tolerance to improve yield has previously been established. Error rate, defined as the percentage of vectors for which the value at a circuit's output deviates from the corresponding error-free ...

Shideh Shahidi; Sandeep Gupta

2008-03-01T23:59:59.000Z

267

Errors and Artefacts in Agent-Based Modelling  

E-Print Network (OSTI)

The objectives of this paper are to define and classify different types of errors and artefacts that can appear in the process of developing an agent-based model, and to propose activities aimed at avoiding them during the model construction and testing phases. To do this in a structured way, we review the main concepts of the process of developing such a model – establishing a general framework that summarises the process of designing, implementing, and using agent-based models. Within this framework we identify the various stages where different types of errors and artefacts may appear. Finally we propose activities that could be used to detect (and hence eliminate) each type of error or artefact.

José Manuel Galán; Luis R. Izquierdo; Segismundo S. Izquierdo; José Ignacio Santos; Ricardo Del Olmo; Adolfo López-Paredes; Bruce Edmonds

2009-01-01T23:59:59.000Z

268

Meta Modeling of Transmission Error for Spur, Helical and Planetary Gears for Wind Turbine Application.  

E-Print Network (OSTI)

??Detailed analysis of drive train dynamics requires accounting for the transmission error that arises in gears. However, the direct computation of the transmission error requires… (more)

Irfan, Muhammad

2013-01-01T23:59:59.000Z

269

T-573: Windows Remote Desktop Client DLL Loading Error Lets Remote...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

73: Windows Remote Desktop Client DLL Loading Error Lets Remote Users Execute Arbitrary Code T-573: Windows Remote Desktop Client DLL Loading Error Lets Remote Users Execute...

270

JLab SRF Cavity Fabrication Errors, Consequences and Lessons Learned  

Science Conference Proceedings (OSTI)

Today, elliptical superconducting RF (SRF) cavities are preferably made from deep-drawn niobium sheets as pursued at Jefferson Laboratory (JLab). The fabrication of a cavity incorporates various cavity cell machining, trimming and electron beam welding (EBW) steps as well as surface chemistry that add to forming errors creating geometrical deviations of the cavity shape from its design. An analysis of in-house built cavities over the last years revealed significant errors in cavity production. Past fabrication flaws are described and lessons learned applied successfully to the most recent in-house series production of multi-cell cavities.

Frank Marhauser

2011-09-01T23:59:59.000Z

271

Laser Phase Errors in Seeded Free Electron Lasers  

SciTech Connect

Harmonic seeding of free electron lasers has attracted significant attention as a method for producing transform-limited pulses in the soft x-ray region. Harmonic multiplication schemes extend seeding to shorter wavelengths, but also amplify the spectral phase errors of the initial seed laser, and may degrade the pulse quality and impede production of transform-limited pulses. In this paper we consider the effect of seed laser phase errors in high gain harmonic generation and echo-enabled harmonic generation. We use simulations to confirm analytical results for the case of linearly chirped seed lasers, and extend the results for arbitrary seed laser envelope and phase.

Ratner, D.; Fry, A.; Stupakov, G.; White, W.; /SLAC

2012-04-17T23:59:59.000Z

272

Composite Toffoli gate with two-round error detection  

E-Print Network (OSTI)

We introduce a fault-tolerant construction to implement a composite quantum operation of four overlapping Toffoli gates. The same construction can produce two independent Toffoli gates. This result lowers resource overheads in designs for quantum computers by more than an order of magnitude. The procedure uses Clifford operations and 64 copies of the non-Clifford gate $T = \\exp[i \\pi (I - \\sigma^z) /8]$. Quantum codes detect errors in the circuit. When the dominant source of error is $T$-gate failure with probability $p$, then the composite Toffoli circuit has postselected failure rate of $3072p^4$ to lowest order.

Cody Jones

2013-03-27T23:59:59.000Z

273

Some aspects regarding human error assessment in resilient sociotechnical systems  

Science Conference Proceedings (OSTI)

The paper focuses on a human reliability analysis (HRA) that provides estimates of relative frequencies for human errors in particular critical tasks, highlighting the exposed areas of the system in which the improvements will be beneficial. The dynamic ... Keywords: human factor qualitative, quantitative analysis, risk, sociotechnical system

Gabriela Tont; Luige Vladareanu; Radu Adrian Munteanu; Dan George Tont

2009-11-01T23:59:59.000Z

274

Automated Source-Level Error Localization in Hardware Designs  

Science Conference Proceedings (OSTI)

Recent achievements in formal verification techniques allow for fault detection even in large real-world designs. Tool support for localizing the faulty statements is critical, because it reduces development time and overall project costs. Automated ... Keywords: design error diagnosis, software debugging, model-based diagnosis, fault localization

Bernhard Peischl; Franz Wotawa

2006-01-01T23:59:59.000Z

275

DISPERSION AND DISSIPATION ERRORS OF TWO FULLY DISCRETE DISCONTINUOUS GALERKIN  

E-Print Network (OSTI)

-dimensional Euler equations in gas dynamics. There has been abundant study on the dispersion analysis of many nuDISPERSION AND DISSIPATION ERRORS OF TWO FULLY DISCRETE DISCONTINUOUS GALERKIN METHODS HE YANG, FENGYAN LI, AND JIANXIAN QIU Abstract. The dispersion and dissipation properties of numerical meth- ods

Li, Fengyan

276

Jackknife empirical likelihood tests for error distributions in regression models  

Science Conference Proceedings (OSTI)

Regression models are commonly used to model the relationship between responses and covariates. For testing the error distribution, some classical test statistics such as Kolmogorov-Smirnov test and Cramer-von-Mises test suffer from the complicated limiting ... Keywords: Goodness-of-fit test, Jackknife empirical Likelihood method, Regression model, primary

Huijun Feng; Liang Peng

2012-11-01T23:59:59.000Z

277

An algorithm for recovering camouflage errors on moving people  

Science Conference Proceedings (OSTI)

In this paper we present a model-based algorithm working as a post-processing phase of any foreground object detector. The model is suited to recover camouflage errors producing the segmentation of an entity in small and unconnected parts. The model ...

D. Conte; P. Foggia; G. Percannella; F. Tufano; M. Vento

2010-08-01T23:59:59.000Z

278

Error mining for wide-coverage grammar engineering  

Science Conference Proceedings (OSTI)

Parsing systems which rely on hand-coded linguistic descriptions can only perform adequately in as far as these descriptions are correct and complete.The paper describes an error mining technique to discover problems in hand-coded linguistic descriptions ...

Gertjan van Noord

2004-07-01T23:59:59.000Z

279

Counter example-based error localization of behavior models  

Science Conference Proceedings (OSTI)

Behavior models are often used to describe behaviors of the system-to-be during requirements analysis or design phases. The correctness of the specified model can be formally verified by model checking techniques. Model checkers provide counterexamples ... Keywords: design, error localization, model checking, requirements analysis

Tsutomu Kumazawa; Tetsuo Tamai

2011-04-01T23:59:59.000Z

280

On the Pressure Gradient Force Error in ?-Coordinate Spectral Models  

Science Conference Proceedings (OSTI)

The pressure gradient force error of the spectral technique used in combination with the ? vertical coordinate was examined in an idealized case of an atmosphere at rest and in hydrostatic equilibrium. Small-scale (one-point and three-point) ...

Zavis?a I. Janji?

1989-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Error computation for predictable real-time software synthesis  

Science Conference Proceedings (OSTI)

Synthesizing an implementation from a model in a predictable way is one of the major challenges in real-time system design. In our previous work we addressed this problem by generating in real-time an execution path through a model and by synchronizing ... Keywords: error computation, predictable design, property prediction, real-time systems

Jeroen Voeten; Oana Florescu; Jinfeng Huang; Henk Corporaal

2011-04-01T23:59:59.000Z

282

Can Wind Lidars Measure Turbulence?  

Science Conference Proceedings (OSTI)

Modeling of the systematic errors in the second-order moments of wind speeds measured by continuous-wave (ZephIR) and pulsed (WindCube) lidars is presented. These lidars use the conical scanning technique to measure the velocity field. The model ...

A. Sathe; J. Mann; J. Gottschall; M. S. Courtney

2011-07-01T23:59:59.000Z

283

Hierarchical decoding of double error correcting codes for high speed reliable memories  

Science Conference Proceedings (OSTI)

As the technology moves into the nano-realm, traditional single-error-correcting, double-error-detecting (SEC-DED) codes are no longer sufficient for protecting memories against transient errors due to the increased multi-bit error rate. The well known ...

Zhen Wang

2013-05-01T23:59:59.000Z

284

B-spline goal-oriented error estimators for geometrically nonlinear rods  

Science Conference Proceedings (OSTI)

We consider goal-oriented a posteriori error estimators for the evaluation of the errors on quantities of interest associated with the solution of geometrically nonlinear curved elastic rods. For the numerical solution of these nonlinear one-dimensional ... Keywords: B-spline basis, Error estimators, Geometrically nonlinear rods, Goal-oriented a posteriori error estimation, Isogeometric analysis

L. Dedè; H. A. Santos

2012-01-01T23:59:59.000Z

285

PROPANE: an environment for examining the propagation of errors in software  

Science Conference Proceedings (OSTI)

In order to produce reliable software, it is important to have knowledge on how faults and errors may affect the software. In particular, designing efficient error detection mechanisms requires not only knowledge on which types of errors to detect but ... Keywords: error propagation analysis, fault injection, software development tools, software reliability

Martin Hiller; Arshad Jhumka; Neeraj Suri

2002-07-01T23:59:59.000Z

286

Reference Undulator Measurement Results  

SciTech Connect

The LCLS reference undulator has been measured 22 times during the course of undulator tuning. These measurements provide estimates of various statistical errors. This note gives a summary of the reference undulator measurements and it provides estimates of the undulator tuning errors. We measured the reference undulator many times during the tuning of the LCLS undulators. These data sets give estimates of the random errors in the tuned undulators. The measured trajectories in the reference undulator are stable and straight to within {+-}2 {micro}m. Changes in the phase errors are less than {+-}2 deg between data sets. The phase advance in the cell varies by less than {+-}2 deg between data sets. The rms variation between data sets of the first integral of B{sub x} is 9.98 {micro}Tm, and the rms variation of the second integral of B{sub x} is 17.4 {micro}Tm{sup 2}. The rms variation of the first integral of B{sub y} is 6.65 {micro}Tm, and the rms variation of the second integral of B{sub y} is 12.3 {micro}Tm{sup 2}. The rms variation of the x-position of the fiducialized beam axis is 35 {micro}m in the final production run This corresponds to an rms uncertainty in the K value of {Delta}K/K = 2.7 x 10{sup -5}. The rms variation of the y-position of the fiducialized beam axis is 4 {micro}m in the final production run.

Wolf, Z

2011-08-18T23:59:59.000Z

287

Cue effectiveness in mitigating postcompletion errors in a routine procedural task  

Science Conference Proceedings (OSTI)

Postcompletion errors, which are omissions of actions required after the completion of a task's main goal, occur in a variety of everyday procedural tasks. Previous research has demonstrated the difficulty of reducing their frequency by means other than ... Keywords: ACT-R, Cognitive architecture, Error intervention, Error mitigation, Goal memory, Human error, Interface design, Modeling, Postcompletion error, Routine procedural task, Visual attention, Visual cue, Visual salience

Phillip H. Chung; Michael D. Byrne

2008-04-01T23:59:59.000Z

288

VSHOT measurement uncertainty and sensitivity study  

DOE Green Energy (OSTI)

The Video Scanning Hartmann Optical Tester (VSHOT) is a slope-measuring tool for large, imprecise reflectors. It is a laser ray trace device developed to measure the optical quality of point-focus solar concentrating mirrors. A unique tool was needed because of the diverse geometry and very large size of solar concentrators, plus their large optical errors. To study the accuracy of VSHOT as well as its sensitivity to changes in test setup variables, a series of experiments were performed with a very precise, astronomical-grade mirror. The slope errors of the reference mirror were much smaller than the resolution of the VSHOT, so that any measured slope errors were caused by the instrument itself rather than the mirror. The VSHOT exceeded its accuracy goals by achieving about {+-}0.5% (68% confidence) error in the determination of focal length and {+-} 0.1 mrad (68% confidence) error in the determination of RMS slope error. Displacement of the test mirror from the optical axis caused the largest source of measured errors.

Jones, S.A.; Gruetzner, J.K.; Houser, R.M.; Edgar, R.M. [Sandia National Labs., Albuquerque, NM (United States); Wendelin, T.J. [National Renewable Energy Lab., Golden, CO (United States)

1997-08-01T23:59:59.000Z

289

Human Errors as an Invaluable Source for Experienced Decision Making  

E-Print Network (OSTI)

: In this paper the traditional paradigm for learning and training of operators in complex systems is discussed and criticised. There is a strong influence (the doctrine of 'mental logic') coming from research carried out in artificial intelligence. The most well known arguments against the artificial intelligence approach are presented and discussed in relation to expertise, intuition and implicit knowledge. The importance of faults and errors are discussed to describe expertise, and how knowledge about unsuccessful behaviour influences the actual decision making process of experts. 1. Introduction In this paper we will discuss the importance of learning from unsuccessful behaviour. What percentage of unanticipated events (e.g., accidents) is caused by human error? This is a question that vexed researchers for years in the context of human interaction with complex systems. In general, incident surveys in a variety of industries attribute high percentages of critical events to ...

Matthias Rauterberg; Roger Aeppli

1996-01-01T23:59:59.000Z

290

Comparison of Wind Power and Load Forecasting Error Distributions: Preprint  

DOE Green Energy (OSTI)

The introduction of large amounts of variable and uncertain power sources, such as wind power, into the electricity grid presents a number of challenges for system operations. One issue involves the uncertainty associated with scheduling power that wind will supply in future timeframes. However, this is not an entirely new challenge; load is also variable and uncertain, and is strongly influenced by weather patterns. In this work we make a comparison between the day-ahead forecasting errors encountered in wind power forecasting and load forecasting. The study examines the distribution of errors from operational forecasting systems in two different Independent System Operator (ISO) regions for both wind power and load forecasts at the day-ahead timeframe. The day-ahead timescale is critical in power system operations because it serves the unit commitment function for slow-starting conventional generators.

Hodge, B. M.; Florita, A.; Orwig, K.; Lew, D.; Milligan, M.

2012-07-01T23:59:59.000Z

291

Table 2b. Relative Standard Errors for Electricity Consumption and  

U.S. Energy Information Administration (EIA) Indexed Site

2b. Relative Standard Errors for Electricity 2b. Relative Standard Errors for Electricity Table 2b. Relative Standard Errors for Electricity Consumption and Electricity Intensities, per Square Foot, Specific to Occupied and Vacant Floorspace, 1992 Building Characteristics All Buildings Using Electricity (thousand) Total Electricity Consumption (trillion Btu) Electricity Intensities (thousand Btu) In Total Floor- space In Occupied Floor- space In Vacant Floor- space Per Square Foot Per Occupied Square Foot Per Vacant Square Foot All Buildings 4 5 5 9 4 4 4 Building Floorspace (Square Feet) 1,001 to 5,000 5 6 6 12 6 6 9 5,001 to 10,000 4 9 9 13 9 9 9 10,001 to 25,000 5 7 7 14 5 5 7 25,001 to 50,000 7 10 10 21 10 10 11 50,001 to 100,000 7 12 12 15 8 8 10 100,001 to 200,000 9 13 13 24 10 11 10 200,001 to 500,000 10 13 13 19 11 11 10 Over 500,000 26 18 18 34

292

Numerical study of error propagation in Monte Carlo depletion simulations  

Science Conference Proceedings (OSTI)

Improving computer technology and the desire to more accurately model the heterogeneity of the nuclear reactor environment have made the use of Monte Carlo depletion codes more attractive in recent years, and feasible (if not practical) even for 3-D depletion simulation. However, in this case statistical uncertainty is combined with error propagating through the calculation from previous steps. In an effort to understand this error propagation, a numerical study was undertaken to model and track individual fuel pins in four 17 x 17 PWR fuel assemblies. By changing the code's initial random number seed, the data produced by a series of 19 replica runs was used to investigate the true and apparent variance in k{sub eff}, pin powers, and number densities of several isotopes. While this study does not intend to develop a predictive model for error propagation, it is hoped that its results can help to identify some common regularities in the behavior of uncertainty in several key parameters. (authors)

Wyant, T.; Petrovic, B. [Nuclear and Radiological Engineering, Georgia Inst. of Technology, 770 State Street, Atlanta, GA 30332-0745 (United States)

2012-07-01T23:59:59.000Z

293

Tracking granules at the Sun's surface and reconstructing velocity fields. II. Error analysis  

E-Print Network (OSTI)

The determination of horizontal velocity fields at the solar surface is crucial to understanding the dynamics and magnetism of the convection zone of the sun. These measurements can be done by tracking granules. Tracking granules from ground-based observations, however, suffers from the Earth's atmospheric turbulence, which induces image distortion. The focus of this paper is to evaluate the influence of this noise on the maps of velocity fields. We use the coherent structure tracking algorithm developed recently and apply it to two independent series of images that contain the same solar signal. We first show that a k-\\omega filtering of the times series of images is highly recommended as a pre-processing to decrease the noise, while, in contrast, using destretching should be avoided. We also demonstrate that the lifetime of granules has a strong influence on the error bars of velocities and that a threshold on the lifetime should be imposed to minimize errors. Finally, although solar flow patterns are easily recognizable and image quality is very good, it turns out that a time sampling of two images every 21 s is not frequent enough, since image distortion still pollutes velocity fields at a 30% level on the 2500 km scale, i.e. the scale on which granules start to behave like passive scalars. The coherent structure tracking algorithm is a useful tool for noise control on the measurement of surface horizontal solar velocity fields when at least two independent series are available.

R. Tkaczuk; M. Rieutord; N. Meunier; T. Roudier

2007-07-13T23:59:59.000Z

294

X-ray optics metrology limited by random noise, instrumental drifts, and systematic errors  

Science Conference Proceedings (OSTI)

Continuous, large-scale efforts to improve and develop third- and forth-generation synchrotron radiation light sources for unprecedented high-brightness, low emittance, and coherent x-ray beams demand diffracting and reflecting x-ray optics suitable for micro- and nano-focusing, brightness preservation, and super high resolution. One of the major impediments for development of x-ray optics with the required beamline performance comes from the inadequate present level of optical and at-wavelength metrology and insufficient integration of the metrology into the fabrication process and into beamlines. Based on our experience at the ALS Optical Metrology Laboratory, we review the experimental methods and techniques that allow us to mitigate significant optical metrology problems related to random, systematic, and drift errors with super-high-quality x-ray optics. Measurement errors below 0.2 mu rad have become routine. We present recent results from the ALS of temperature stabilized nano-focusing optics and dedicated at-wavelength metrology. The international effort to develop a next generation Optical Slope Measuring System (OSMS) to address these problems is also discussed. Finally, we analyze the remaining obstacles to further improvement of beamline x-ray optics and dedicated metrology, and highlight the ways we see to overcome the problems.

Yashchuk, Valeriy V.; Anderson, Erik H.; Barber, Samuel K.; Cambie, Rossana; Celestre, Richard; Conley, Raymond; Goldberg, Kenneth A.; McKinney, Wayne R.; Morrison, Gregory; Takacs, Peter Z.; Voronov, Dmitriy L.; Yuan, Sheng; Padmore, Howard A.

2010-07-09T23:59:59.000Z

295

Wind and Load Forecast Error Model for Multiple Geographically Distributed Forecasts  

Science Conference Proceedings (OSTI)

The impact of wind and load forecast errors on power grid operations is frequently evaluated by conducting multi-variant studies, where these errors are simulated repeatedly as random processes based on their known statistical characteristics. To generate these errors correctly, we need to reflect their distributions (which do not necessarily follow a known distribution law), standard deviations, auto- and cross-correlations. For instance, load and wind forecast errors can be closely correlated in different zones of the system. This paper introduces a new methodology for generating multiple cross-correlated random processes to simulate forecast error curves based on a transition probability matrix computed from an empirical error distribution function. The matrix will be used to generate new error time series with statistical features similar to observed errors. We present the derivation of the method and present some experimental results by generating new error forecasts together with their statistics.

Makarov, Yuri V.; Reyes Spindola, Jorge F.; Samaan, Nader A.; Diao, Ruisheng; Hafen, Ryan P.

2010-11-02T23:59:59.000Z

296

A mathematical model and implementation of the test system for measurement of the gyro stabilization error  

Science Conference Proceedings (OSTI)

Modern armored vehicles allow firing during motion. In order to reduce the influence of angular displacements (caused by the vehicle moving) of the cannon's tube (and hindsight), axis stabilization using rate-gyroscopes is provided. A particular problem ... Keywords: control system, gyroscope stabilization, modeling

Slobodan Obradovic; Milan Tuba; Nicolae Popoviciu

2010-02-01T23:59:59.000Z

297

Reducing Wave-Induced Microwave Water Level Measurement Error with a Least Squares Designed Digital Filter  

Science Conference Proceedings (OSTI)

A microwave water level sensor, the Design Analysis Model H-3611i, will soon enter service at tide stations operated by the U.S. National Oceanic and Atmospheric Administration, Center for Operational Oceanographic Products and Services (CO-OPS), ...

John D. Boon

298

Wind-Induced Error of Raindrop Size Distribution Measurement Using a Two-Dimensional Video Disdrometer  

Science Conference Proceedings (OSTI)

The authors investigate a disdrometer that provides information on raindrop size distribution, terminal velocity, and shape using video imaging technology. Two video cameras are enclosed in a large box and provide images of the passing drops. The ...

Vladislav Nešpor; Witold F. Krajewski; Anton Kruger

2000-11-01T23:59:59.000Z

299

Magnetically-invoked motor evoked potentials (MEPs): an assessment of the errors in measuring latencies  

Science Conference Proceedings (OSTI)

Magnetic stimulation is extensively used in research of the intra-cortical connections of the human brain, but there is relatively little evidence of its reliability in terms of generating repeatable Motor Evoked Potentials (MEPs) which are often used ... Keywords: CMCT, EMG, TMS, cortex, magnetic stimulation, reliability

C. F. J. Hovey; I. W. Griffiths; P. W. McCarthy

2009-09-01T23:59:59.000Z

300

Errors of Naturally Ventilated Air Temperature Measurements in a Spatial Observation Network  

Science Conference Proceedings (OSTI)

A spatial network of 25 air temperature sensors was deployed over an area of 3.5 km × 3.5 km of agricultural land, aiming to calculate the sensible heat flux by spatial averaging instead of temporal averaging. Since temperature sensors in ...

Matthias Mauder; R. L. Desjardins; Zhiling Gao; Ronald van Haarlem

2008-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
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to obtain the most current and comprehensive results.


301

Centrifuging of Hydrometeors and Debris in Tornadoes: Radar-Reflectivity Patterns and Wind-Measurement Errors  

Science Conference Proceedings (OSTI)

High-resolution Doppler radar observations of tornadoes reveal a distinctive tornado-scale signature with the following properties: a reflectivity minimum aloft inside the tornado core (described previously as an “eye”), a high-reflectivity tube ...

David C. Dowell; Curtis R. Alexander; Joshua M. Wurman; Louis J. Wicker

2005-06-01T23:59:59.000Z

302

Sensor and Electronic Biases/Errors in Air Temperature Measurements in Common Weather Station Networks  

Science Conference Proceedings (OSTI)

The biases of four commonly used air temperature sensors are examined and detailed. Each temperature transducer consists of three components: temperature sensing elements, signal conditioning circuitry, and corresponding analog-to-digital ...

X. Lin; K. G. Hubbard

2004-07-01T23:59:59.000Z

303

Sampling Errors in the Measurement of Rainfall Parameters Using the Precipitation Occurrence Sensor System (POSS)  

Science Conference Proceedings (OSTI)

The Precipitation Occurrence Sensor System (POSS) is a small Doppler radar originally designed by the Meteorological Service of Canada (MSC) to report the occurrence, type, and intensity of precipitation in automated observing stations. It is ...

B. E. Sheppard

2007-02-01T23:59:59.000Z

304

Calibration Accuracy Of Aerial Multispectral Reflectance Images And Estimation Of Error Sources  

E-Print Network (OSTI)

: We have performed a systematic study of the calibration accuracy of multispectral aerial reflectance images. The study is part of the improvement of change detection for aerial and satellite multispectral images. It is based on (a) a multitemporal image data set from the multispectral airborne scanner Daedalus AADS 1268 and (b) simultaneously made ground based hyperspectral reflectance measurements. Reflectance images were obtained from the raw images by processing with the program package SENSAT-5, using standard urban atmospheres in the MODTRAN code. The systematic uncertainty of the resulting reflectance spectra is mainly due to the uncertainty in the atmospheric parameters. It can be reduced by fitting the Daedalus spectra to ground truth hyperspectral reflectance measurements of selected surfaces. The resulting uncertainty oe ae =ae of the reflectance ae is estimated to be 11.0 % on average. KEY WORDS: Remote sensing, Reflectance, Error sources 1 INTRODUCTION Remotely sensed ...

Andre Rothkirch; Martin Kollewe; Hartwig Spitzer

1998-01-01T23:59:59.000Z

305

Antenna Pattern Analysis and Measurements for Multiparameter Radars  

Science Conference Proceedings (OSTI)

Measuring the full polarization matrix using a research radar requires knowledge of the complex (i.e., amplitude and phase) antenna pattern to properly correct for bias errors in the measurements. However, generally only power patterns are ...

V. Chandrasekar; R. Jeffrey Keeler

1993-10-01T23:59:59.000Z

306

The Effect of Measurement Bias on Nuclear Criticality Safety Calculations for WIPP TRUPACT-II Shipments  

Science Conference Proceedings (OSTI)

Current nuclear criticality safety limit requirements for transporting TRUPACT-II waste containers to the U.S. Department of Energy's Waste Isolation Pilot Plant (WIPP) specify that the {sup 239}Pu fissile gram equivalent (FGE) plus two times its measurement error must be {TRUPACT-II FGE measurement error value is to take the square root of the sum of the squared error values for the individual containers (often called root-sum-squares or simply RSS). However, to the extent that the individual drum measurements contain common bias effects (e.g., due to common calibration or other adjustment factors), the corresponding measurement errors are correlated, and simple RSS calculations will underestimate the true error in the TRUPACT-II FGE value.The RSS calculations assume independence, while common bias effects can induce strong correlations between the errors in measurements. Significant bias effects can occur when the matrix characteristics for a particular waste type are not fully accounted for in the measurement process. Depending on the relative size of the bias error compared to precision error, the true measurement error can be greater than twice that calculated by RSS. In such cases, the FGE shipping requirement may not be met. To avoid underestimating the error, bias components should be estimated and propagated separately (combined only at the final step in the TRUPACT-II FGE calculation), or the effect of bias on covariance between measurements must be calculated. These covariance terms then need to be included in the final uncertainty calculations.

Blackwood, Larry G.; Harker, Yale D. [Idaho National Engineering and Environmental Laboratory (United States)

2000-12-15T23:59:59.000Z

307

Discrete, 3D distributed, linear imaging methods of electric neuronal activity. Part 1: exact, zero error localization  

E-Print Network (OSTI)

This paper deals with the EEG/MEG neuroimaging problem: given measurements of scalp electric potential differences (EEG: electroencephalogram) and extracranial magnetic fields (MEG: magnetoencephalogram), find the 3D distribution of the generating electric neuronal activity. This problem has no unique solution. Only particular solutions with "good" localization properties are of interest, since neuroimaging is concerned with the localization of brain function. In this paper, a general family of linear imaging methods with exact, zero error localization to point-test sources is presented. One particular member of this family is sLORETA (standardized low resolution brain electromagnetic tomography; Pascual-Marqui, Methods Find. Exp. Clin. Pharmacol. 2002, 24D:5-12; http://www.unizh.ch/keyinst/NewLORETA/sLORETA/sLORETA-Math01.pdf). It is shown here that sLORETA has no localization bias in the presence of measurement and biological noise. Another member of this family, denoted as eLORETA (exact low resolution brain electromagnetic tomography; Pascual-Marqui 2005: http://www.research-projects.unizh.ch/p6990.htm), is a genuine inverse solution (not merely a linear imaging method) with exact, zero error localization in the presence of measurement and structured biological noise. The general family of imaging methods is further extended to include data-dependent (adaptive) quasi-linear imaging methods, also with the exact, zero error localization property.

Roberto D. Pascual-Marqui

2007-10-17T23:59:59.000Z

308

From the Lab to the real world : sources of error in UF {sub 6} gas enrichment monitoring  

SciTech Connect

Safeguarding uranium enrichment facilities is a serious concern for the International Atomic Energy Agency (IAEA). Safeguards methods have changed over the years, most recently switching to an improved safeguards model that calls for new technologies to help keep up with the increasing size and complexity of today’s gas centrifuge enrichment plants (GCEPs). One of the primary goals of the IAEA is to detect the production of uranium at levels greater than those an enrichment facility may have declared. In order to accomplish this goal, new enrichment monitors need to be as accurate as possible. This dissertation will look at the Advanced Enrichment Monitor (AEM), a new enrichment monitor designed at Los Alamos National Laboratory. Specifically explored are various factors that could potentially contribute to errors in a final enrichment determination delivered by the AEM. There are many factors that can cause errors in the determination of uranium hexafluoride (UF{sub 6}) gas enrichment, especially during the period when the enrichment is being measured in an operating GCEP. To measure enrichment using the AEM, a passive 186-keV (kiloelectronvolt) measurement is used to determine the {sup 235}U content in the gas, and a transmission measurement or a gas pressure reading is used to determine the total uranium content. A transmission spectrum is generated using an x-ray tube and a “notch” filter. In this dissertation, changes that could occur in the detection efficiency and the transmission errors that could result from variations in pipe-wall thickness will be explored. Additional factors that could contribute to errors in enrichment measurement will also be examined, including changes in the gas pressure, ambient and UF{sub 6} temperature, instrumental errors, and the effects of uranium deposits on the inside of the pipe walls will be considered. The sensitivity of the enrichment calculation to these various parameters will then be evaluated. Previously, UF{sub 6} gas enrichment monitors have required empty pipe measurements to accurately determine the pipe attenuation (the pipe attenuation is typically much larger than the attenuation in the gas). This dissertation reports on a method for determining the thickness of a pipe in a GCEP when obtaining an empty pipe measurement may not be feasible. This dissertation studies each of the components that may add to the final error in the enrichment measurement, and the factors that were taken into account to mitigate these issues are also detailed and tested. The use of an x-ray generator as a transmission source and the attending stability issues are addressed. Both analytical calculations and experimental measurements have been used. For completeness, some real-world analysis results from the URENCO Capenhurst enrichment plant have been included, where the final enrichment error has remained well below 1% for approximately two months.

Lombardi, Marcie L.

2012-03-01T23:59:59.000Z

309

Using Singular Value Decomposition to Parameterize State-Dependent Model Errors  

Science Conference Proceedings (OSTI)

The purpose of the present study is to use a new method of empirical model error correction, developed by Danforth et al. in 2007, based on estimating the systematic component of the nonperiodic errors linearly dependent on the anomalous state. ...

Christopher M. Danforth; Eugenia Kalnay

2008-04-01T23:59:59.000Z

310

A realistic evaluation of memory hardware errors and software system susceptibility  

Science Conference Proceedings (OSTI)

Memory hardware reliability is an indispensable part of whole-system dependability. This paper presents the collection of realistic memory hardware error traces (including transient and non-transient errors) from production computer systems with more ...

Xin Li; Michael C. Huang; Kai Shen; Lingkun Chu

2010-06-01T23:59:59.000Z

311

Automated repair of HTML generation errors in PHP applications using string constraint solving  

Science Conference Proceedings (OSTI)

PHP web applications routinely generate invalid HTML. Modern browsers silently correct HTML errors, but sometimes malformed pages render inconsistently, cause browser crashes, or expose security vulnerabilities. Fixing errors in generated pages is usually ...

Hesam Samimi; Max Schäfer; Shay Artzi; Todd Millstein; Frank Tip; Laurie Hendren

2012-06-01T23:59:59.000Z

312

Effect of Observational Sampling Error on the Detection of Anthropogenic Climate Change  

Science Conference Proceedings (OSTI)

The effect of sampling error in surface air temperature observations is assessed for detection and attribution of an anthropogenic signal. This error arises because grid-box values are based on varying densities of station and marine data. An ...

Gabriele C. Hegerl; Philip D. Jones; Tim P. Barnett

2001-01-01T23:59:59.000Z

313

Reducing Orbit Error for a Better Estimate of oceanic Variability from Satellite Altimetry  

Science Conference Proceedings (OSTI)

The variable ocean dynamic topography is generally estimated from the satellite altimeter signal once the orbit error has been removed. To compute the orbit error, the most conventional technique is to fit a polynomial function (zeroth, first, or ...

F. Blanc; P. Y. Le Traon; S. Houry

1995-02-01T23:59:59.000Z

314

Awareness of both type I and II errors in climate science and assessment  

Science Conference Proceedings (OSTI)

Treatment of error and uncertainty is an essential component of science and is crucial in policy-relevant disciplines such as climate science. We posit here that awareness of both “false positive” and “false negative” errors is particularly critical in ...

William R. L. Anderegg; Elizabeth S. Callaway; Maxwell T. Boykoff; Gary Yohe; Terry L. Root

315

The Impact of Satellite Sounding Data on the Systematic Error of a Numerical Weather Prediction Model  

Science Conference Proceedings (OSTI)

The impact of satellite sounding data on the systematic errors of the numerical weather prediction model of the Israel Meteorological Service has been investigated. In general, satellite data have been shown to reduce systematic error, and in ...

Noah Wolfson; Albert Thomasell; Arnold Gruber; George Ohring

1985-06-01T23:59:59.000Z

316

The Effect of Satellite Rainfall Error Modeling on Soil Moisture Prediction Uncertainty  

Science Conference Proceedings (OSTI)

This study assesses the impact of satellite rainfall error structure on soil moisture simulations with the NASA Catchment land surface model. Specifically, the study contrasts a complex satellite rainfall error model (SREM2D) with the standard ...

Viviana Maggioni; Rolf H. Reichle; Emmanouil N. Anagnostou

2011-06-01T23:59:59.000Z

317

The Impact of Altimeter Sampling Patterns on Estimates of Background Errors in a Global Wave Model  

Science Conference Proceedings (OSTI)

One of the main limitations to current wave data assimilation systems is the lack of an accurate representation of the structure of the background errors. One method that may be used to determine background errors is the observational method of ...

Diana J. M. Greenslade; Ian R. Young

2005-12-01T23:59:59.000Z

318

A Stochastic-Dynamic Model for the Spatial Structure of Forecast Error Statistics  

Science Conference Proceedings (OSTI)

A simple model that yields the spatial correlation structure of global atmospheric mass-field forecast errors is derived. The model states that the relative potential vorticity of the forecast error is forced by spatially multi-dimensional white ...

R. Balgovind; A. Dalcher; M. Ghil; E. Kalnay

1983-04-01T23:59:59.000Z

319

Relationship between Precipitation Forecast Errors and Skill Scores of Dichotomous Forecasts  

Science Conference Proceedings (OSTI)

In this paper, the sensitivities of the equitable threat score (ETS) and the true skill score (TSS), obtained with a 2 × 2 contingency table, to continuous precipitation forecast errors are investigated. Two idealized error models are adopted to ...

Nazario Tartaglione

2010-02-01T23:59:59.000Z

320

V-172: ISC BIND RUNTIME_CHECK Error Lets Remote Users Deny Service...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Addthis Related Articles U-038: BIND 9 Resolver crashes after logging an error in query.c U-039: ISC Update: BIND 9 Resolver crashes after logging an error in query.c T-662:...

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Truncation Error Estimates for Refinement Criteria in Nested and Adaptive Models  

Science Conference Proceedings (OSTI)

Truncation error estimates are considered as criteria for fine-grid placement and movement in nested and adaptive finite-difference atmospheric models. A simple method for calculating the truncation error at any time during an integration is ...

William C. Skamrock

1989-04-01T23:59:59.000Z

322

U-041: Google Chrome Out-of-Bounds Write Error Lets Remote Users...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1: Google Chrome Out-of-Bounds Write Error Lets Remote Users Execute Arbitrary Code U-041: Google Chrome Out-of-Bounds Write Error Lets Remote Users Execute Arbitrary Code November...

323

V-109: Google Chrome WebKit Type Confusion Error Lets Remote...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

9: Google Chrome WebKit Type Confusion Error Lets Remote Users Execute Arbitrary Code V-109: Google Chrome WebKit Type Confusion Error Lets Remote Users Execute Arbitrary Code...

324

Evolution of Analysis Error and Adjoint-Based Sensitivities: Implications for Adaptive Observations  

Science Conference Proceedings (OSTI)

The structure and evolution of analysis error and adjoint-based sensitivities [potential enstrophy initial singular vectors (SVs) and gradient sensitivities of the forecast error to initial conditions] are compared following a cyclone development ...

Hyun Mee Kim; Michael C. Morgan; Rebecca E. Morss

2004-04-01T23:59:59.000Z

325

U-063: RSA SecurID Software Token for Windows DLL Loading Error...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

3: RSA SecurID Software Token for Windows DLL Loading Error Lets Remote Users Execute Arbitrary Code U-063: RSA SecurID Software Token for Windows DLL Loading Error Lets Remote...

326

The Effect of Serially Correlated Observation and Model Error on Atmospheric Data Assimilation  

Science Conference Proceedings (OSTI)

Observation error statistics are required in most atmospheric data assimilation systems. While observation errors are often assumed to be spatially correlated, serial correlations have received virtually no attention. In this article, the effect ...

Roger Daley

1992-01-01T23:59:59.000Z

327

Sensitivity of the Systematic Error of Extended Range Forecasts to Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

The sensitivity of the systematic error of extended-range forecasts to sea surface temperature (SST) anomalies is investigated. General circulation model (GCM) experiments were performed to quantify error patterns for warm, normal, and cold SST ...

Kingtse C. Mo; X. L. Wang

1995-06-01T23:59:59.000Z

328

Aperiodic dynamical decoupling sequences in the presence of pulse errors  

SciTech Connect

Dynamical decoupling (DD) is a promising tool for preserving the quantum states of qubits. However, small imperfections in the control pulses can seriously affect the fidelity of decoupling, and qualitatively change the evolution of the controlled system at long times. Using both analytical and numerical tools, we theoretically investigate the effect of the pulse error accumulation for two aperiodic DD sequences, Uhrig's DD (UDD) protocol (Uhrig 2007 Phys. Rev. Lett. 98 100504), and the quadratic DD (QDD) protocol (West et al 2010 Phys. Rev. Lett. 104 130501). We consider the implementation of these sequences using the electron spins of phosphorus donors in silicon, where DD sequences are applied to suppress dephasing of the donor spins. The dependence of the decoupling fidelity on different initial states of the spins is the focus of our study. We investigate in detail the initial drop in the DD fidelity, and its long-term saturation. We also demonstrate that by applying the control pulses along different directions, the performance of QDD protocols can be noticeably improved, and explain the reason for such an improvement. Our results can be useful for future implementations of the aperiodic decoupling protocols, and for better understanding of the impact of errors on quantum control of spins.

Wang, Zhi-Hui; Dobrovitski, V. V.

2011-01-12T23:59:59.000Z

329

Characterization and Impact of Extreme Forecast Errors on Power Systems  

SciTech Connect

Extreme events in the electrical power system, caused by the load and wind forecasting errors, can impact the power system infrastructure via two main avenues. The first avenue is a sudden and significant power unbalance exceeding reasonable operating reserve capacity. The second is a sudden increase of power flows on the system critical paths causing transmission violations. The challenge in managing these system unbalances is more significant for a standalone balancing area operation. The consolidation of balancing authorities into a single balancing area can offset the operating reserve problem but this strategy enhances incremental power flows on the transmission interfaces, potentially leading to more unpredictable transmission congestion. This paper evaluates the expectancy of occurrence of tail events due to forecast error extremes using California ISO and BPA data. Having this type of information, independent system operators and operating utilities could be better prepared to address the tail events by exploring alternative reserve options such as: wide area control coordination, new operating proce-dures and remedial actions.

Heydt, Gerald T.; Vittal, Vijay; Malhara, Sunita V.; Makarov, Yuri V.; Zhou, Ning; Etingov, Pavel V.

2011-12-15T23:59:59.000Z

330

The Use of Thinking Errors Instruction in Texas DAEPs as a Means to Improve Student Behavior  

E-Print Network (OSTI)

The use of disciplinary measures to deal with student behavior brings with it the responsibility to educate the student, not only academically, but socially. It is the social or behavioral component of education that is lacking in most Texas Disciplinary Alternative Education Program (DAEP) settings. The current DAEP model does not provide the means nor the method by which students’ behavior can be remediated, so students’ need for learning positive behaviors goes unmet. The Texas Education Code (TEC Chap. 37) mandates that DAEPs provide instruction in “self-discipline,” but it does not specify how this instruction is to be delivered. In addition, it does not provide for oversight or evaluation, so these requirements may be inconsistently fulfilled, or not fulfilled at all. Many of the students who attend DAEPs have behavioral and emotional difficulties, and are considered at risk for academic failure. Although there have been programs to compensate for and remediate academic skill deficits, there is not one comprehensive program to help students learn appropriate behaviors and overcome risk factors. The Thinking Errors program was developed to help students become aware that the choices they make every day are influenced by poor patterns of thinking. It is designed to help students correct these thinking patterns and learn to take responsibility for their own decisions and behaviors. The purpose of this study is to evaluate the effectiveness of the Thinking Errors program in helping students change their behavior.

Turner, Karen T.

2010-08-01T23:59:59.000Z

331

Effective Error Bounds in Euler-Maclaurin-Based QuadratureSchemes  

SciTech Connect

We analyze the behavior of Euler-Maclaurin-basedintegrationschemes with the intention of deriving accurate andeconomicestimations of the error term.

Bailey, David H.; Borwein, Jonathan M.

2005-06-21T23:59:59.000Z

332

Error encoding and decoding model over communication channel for synthesis of proteins from DNA sequences  

Science Conference Proceedings (OSTI)

The expression 'error correcting code' can be understood as a code with the ability to detect and correct the presence of errors caused by noise or other impairments or mutations during transmission from the transmitter/nucleus to the receiver/organelle. ... Keywords: Reed-Muller code, biological systems, coding theory, encoding DNA sequences, error correcting codes, information transmission

Prajna Paramita Debata; Satyabrata Das; Debahuti Mishra; Sashikala Mishra; Kailash Shaw; Gayatri Mahapatro

2012-08-01T23:59:59.000Z

333

Error estimation for the HHT method in non-linear solid dynamics  

Science Conference Proceedings (OSTI)

This work presents a new error estimator that can be used in both linear and non-linear solid and structural dynamic problems. Specifically, this estimator is developed for the Hilber-Hughes-Taylor (HHT) method and it takes into account the error made ... Keywords: Error estimation, Finite elements, Solid dynamics, Structural dynamics, Time integration

Luis M. Lacoma; Ignacio Romero

2007-02-01T23:59:59.000Z

334

DRAM errors in the wild: a large-scale field study  

Science Conference Proceedings (OSTI)

Errors in dynamic random access memory (DRAM) are a common form of hardware failure in modern compute clusters. Failures are costly both in terms of hardware replacement costs and service disruption. While a large body of work exists on DRAM in laboratory ... Keywords: data corruption, dimm, dram, dram reliability, ecc, empirical study, hard error, large-scale systems, memory, soft error

Bianca Schroeder; Eduardo Pinheiro; Wolf-Dietrich Weber

2009-06-01T23:59:59.000Z

335

Systematic rotation and receiver-location error effects on parabolic-trough annual performance  

DOE Green Energy (OSTI)

The effects of certain systematic errors on performance and, therefore, their influence on the design of troughs are studied. The technique for calculating the influence of systematic errors on performance is outlined and methods for identifying and minimizing these errors are suggested.

Treadwell, G.W.; Grandjean, N.R.

1981-04-01T23:59:59.000Z

336

New autoregressive (AR) order selection criteria based on the prediction error estimation  

Science Conference Proceedings (OSTI)

The most important problem in data modeling using the AR model is the order selection. Some AR order selection criteria estimate the prediction error and choose the order that minimizes this estimated prediction error. All of these criteria use the same ... Keywords: Autoregressive model order selection, Least-Squares-Forward method, Prediction error

S. Khorshidi; M. Karimi; A. R. Nematollahi

2011-10-01T23:59:59.000Z

337

Circuit optimization techniques to mitigate the effects of soft errors in combinational logic  

Science Conference Proceedings (OSTI)

Soft errors in combinational logic circuits are emerging as a significant reliability problem for VLSI designs. Technology scaling trends indicate that the soft error rates (SER) of logic circuits will be dominant factor for future technology generations. ... Keywords: Soft errors, circuit optimization, combinational logic, sequential circuits

Rajeev R. Rao; Vivek Joshi; David Blaauw; Dennis Sylvester

2009-12-01T23:59:59.000Z

338

Information preserving structures: A general framework for quantum zero-error information  

E-Print Network (OSTI)

Quantum systems carry information. Quantum theory supports at least two distinct kinds of information (classical and quantum), and a variety of different ways to encode and preserve information in physical systems. A system's ability to carry information is constrained and defined by the noise in its dynamics. This paper introduces an operational framework, using information-preserving structures to classify all the kinds of information that can be perfectly (i.e., with zero error) preserved by quantum dynamics. We prove that every perfectly preserved code has the same structure as a matrix algebra, and that preserved information can always be corrected. We also classify distinct operational criteria for preservation (e.g., "noiseless", "unitarily correctible", etc.) and introduce two new and natural criteria for measurement-stabilized and unconditionally preserved codes. Finally, for several of these operational critera, we present efficient (polynomial in the state-space dimension) algorithms to find all of a channel's information-preserving structures.

Robin Blume-Kohout; Hui Khoon Ng; David Poulin; Lorenza Viola

2010-06-07T23:59:59.000Z

339

The robustness of magic state distillation against errors in Clifford gates  

E-Print Network (OSTI)

Quantum error correction and fault-tolerance have provided the possibility for large scale quantum computations without a detrimental loss of quantum information. A very natural class of gates for fault-tolerant quantum computation is the Clifford gate set and as such their usefulness for universal quantum computation is of great interest. Clifford group gates augmented by magic state preparation give the possibility of simulating universal quantum computation. However, experimentally one cannot expect to perfectly prepare magic states. Nonetheless, it has been shown that by repeatedly applying operations from the Clifford group and measurements in the Pauli basis, the fidelity of noisy prepared magic states can be increased arbitrarily close to a pure magic state [1]. We investigate the robustness of magic state distillation to perturbations of the initial states to arbitrary locations in the Bloch sphere due to noise. Additionally, we consider a depolarizing noise model on the quantum gates in the decoding ...

Jochym-O'Connor, Tomas; Helou, Bassam; Laflamme, Raymond

2012-01-01T23:59:59.000Z

340

Purify: Fast detection of memory leaks and access errors  

E-Print Network (OSTI)

This paper describes Purifyru, a software testing and quality assurance Ool that detects memory leaks and access erors. Purify inserts additional checking instructions directly into the object code produced by existing compilers. These instructions check every memory read and write performed by the program-under-test and detect several types of access errors, such as reading uninitialized memory or witing to freed memory. Purify inserts checking logic into all of the code in a program, including third-party and vendor object-code libraries, and verifies system call interfaces. In addition, Purify tracks memory usage and identifies individual memory leals using a novel adaptation of garbage collection techniques. Purify produce standard executable files compatible with existing debuggers, and currently runs on Sun Microsystems ' SPARC family of workstations. Purify's neafly-comprehensive memory access checking slows the target program down typically by less than a facor of three and has resulted in significantly more reliable software for several development goups. L.

Reed Hastings; Bob Joyce

1991-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Improving the efficiency of decoding quantum error correction code  

E-Print Network (OSTI)

To improve the efficiency of the encoding and the decoding is the important problem in the quantum error correction. In a preceding work, a general algorithm for decoding the stabilizer code is shown. This paper will show an decoding which is more efficient for some codes. The proposed decoding as well as the conventional decoding consists of the eigenvalue output step and the entanglement dissolution step. The proposed decoding outputs a part of the eigenvalues into a part of the code qubits in contrast to the conventional method's outputting into the ancilla. Besides, the proposed decoding dissolves a part of the entanglement in the eigenvalue output step in contrast to the conventional method which does not dissolve in the eigenvalue output step. With these improvements, the number of gates was reduced for some codes.

Kenichiro Furuta

2006-08-21T23:59:59.000Z

342

Improving the efficiency of decoding quantum error correction code  

E-Print Network (OSTI)

To improve the efficiency of the encoding and the decoding is the important problem in the quantum error correction. In a preceding work, a general algorithm for decoding the stabilizer code is shown. This paper will show an decoding which is more efficient for some codes. The proposed decoding as well as the conventional decoding consists of the eigenvalue output step and the entanglement dissolution step. The proposed decoding outputs a part of the eigenvalues into a part of the code qubits in contrast to the conventional method's outputting into the ancilla. Besides, the proposed decoding dissolves a part of the entanglement in the eigenvalue output step in contrast to the conventional method which does not dissolve in the eigenvalue output step. With these improvements, the number of gates was reduced for some codes.

Furuta, K

2006-01-01T23:59:59.000Z

343

Coordinated joint motion control system with position error correction  

DOE Patents (OSTI)

Disclosed are an articulated hydraulic machine supporting, control system and control method for same. The articulated hydraulic machine has an end effector for performing useful work. The control system is capable of controlling the end effector for automated movement along a preselected trajectory. The control system has a position error correction system to correct discrepancies between an actual end effector trajectory and a desired end effector trajectory. The correction system can employ one or more absolute position signals provided by one or more acceleration sensors supported by one or more movable machine elements. Good trajectory positioning and repeatability can be obtained. A two-joystick controller system is enabled, which can in some cases facilitate the operator's task and enhance their work quality and productivity.

Danko, George (Reno, NV)

2011-11-22T23:59:59.000Z

344

Coordinated joint motion control system with position error correction  

SciTech Connect

Disclosed are an articulated hydraulic machine supporting, control system and control method for same. The articulated hydraulic machine has an end effector for performing useful work. The control system is capable of controlling the end effector for automated movement along a preselected trajectory. The control system has a position error correction system to correct discrepancies between an actual end effector trajectory and a desired end effector trajectory. The correction system can employ one or more absolute position signals provided by one or more acceleration sensors supported by one or more movable machine elements. Good trajectory positioning and repeatability can be obtained. A two-joystick controller system is enabled, which can in some cases facilitate the operator's task and enhance their work quality and productivity.

Danko, George (Reno, NV)

2011-11-22T23:59:59.000Z

345

Magnetotelluric measurements  

DOE Green Energy (OSTI)

The ideas of flux quantization and Josephson tunneling are reviewed, and the operation of the dc SQUID as a magnetometer is described. The SQUID currently used for magnetotellurics has a sensitivity of 10/sup -14/ T Hz/sup -1/2/, a dynamic range at 10/sup 7/ in a 1 Hz bandwidth, a frequency response from 0 to 40 kHz, and a slewing rate of 5 x 10/sup -5/T s/sup -1/. Recent improvements in sensitivity are discussed: SQUIDS are rapidly approaching the limit imposed by the uncertainty principle. The essential ideas of magnetotelluric (MT) measurements are outlined, and it is shown how the remote reference method can lead to major reductions in bias errors compared to more conventional schemes. The field techniques of the Berkeley group are described. The practical application of MT requires that amplitude and phase spectra of apparent resistivities be transformed into a geologically useful distribution of subsurface resistivities. In many areas where MT is being applied today, the technique may not provide the information needed because stations are too few and widely spaced, or because we are unable to interpret data influenced by complex 3-D resistivity features. The results of two surveys, one detailed, the other regional, over the Klamath Basin, Oregon, are examined. The detailed survey is able to resolve small (1 km wide) structural features that are missed or add a component of spatial aliasing to the regional data. On the other hand, the regional survey avoids truncation effects that may occur when the survey undersamples an area.

Clarke, J.; Goldstein, N.E.

1980-06-01T23:59:59.000Z

346

Development and Validation of a Time-Lag Correction for Vaisala Radiosonde Humidity Measurements  

Science Conference Proceedings (OSTI)

This study presents a method of improving the accuracy of relative humidity (RH) measurements from Vaisala RS80 and RS90 radiosondes by applying sensor-based corrections for well-understood sources of measurement error. Laboratory measurements of ...

Larry M. Miloshevich; Ari Paukkunen; Holger Vömel; Samuel J. Oltmans

2004-09-01T23:59:59.000Z

347

A Causal Model of Human Error for Safety Critical User Interface Design  

E-Print Network (OSTI)

This paper describes a method of assessing the implications for human error on user interface design of safety-critical software. In previous work we have proposed taxonomy of influencing factors that contribute to error. In this paper, components of the taxonomy are combined into a mathematical and causal model for error, represented as a Bayesian Belief Net (BBN). The BBN quantifies error influences arising from user knowledge, ability and the task environment, combined with factors describing the complexity of user action and user interface quality. The BBN model predicts probabilities of different types of error, slips and mistakes, for each component action of a task involving user-system interaction. We propose an Impact Analysis Method that involves running test scenarios against this causal model of error in order to determine those user actions that are prone to different types of error. Applying the proposed method will enable the designer to determine the combinations of inf...

Alistair G. Sutcliffe; Julia Galliers; Julia Galliers; Shailey Minocha; Shailey Minocha; Alistair Sutcliffe

1998-01-01T23:59:59.000Z

348

Temperature Measurements in the Magnetic Measurement Facility  

SciTech Connect

Several key LCLS undulator parameter values depend strongly on temperature primarily because of the permanent magnet material the undulators are constructed with. The undulators will be tuned to have specific parameter values in the Magnetic Measurement Facility (MMF). Consequently, it is necessary for the temperature of the MMF to remain fairly constant. Requirements on undulator temperature have been established. When in use, the undulator temperature will be in the range 20.0 {+-} 0.2 C. In the MMF, the undulator tuning will be done at 20.0 {+-} 0.1 C. For special studies, the MMF temperature set point can be changed to a value between 18 C and 23 C with stability of {+-}0.1 C. In order to ensure that the MMF temperature requirements are met, the MMF must have a system to measure temperatures. The accuracy of the MMF temperature measurement system must be better than the {+-}0.1 C undulator tuning temperature tolerance, and is taken to be {+-}0.01 C. The temperature measurement system for the MMF is under construction. It is similar to a prototype system we built two years ago in the Sector 10 alignment lab at SLAC. At that time, our goal was to measure the lab temperature to {+-}0.1 C. The system has worked well for two years and has maintained its accuracy. For the MMF system, we propose better sensors and a more extensive calibration program to achieve the factor of 10 increase in accuracy. In this note we describe the measurement system under construction. We motivate our choice of system components and give an overview of the system. Most of the software for the system has been written and will be discussed. We discuss error sources in temperature measurements and show how these errors have been dealt with. The calibration system is described in detail. All the LCLS undulators must be tuned in the Magnetic Measurement Facility at the same temperature to within {+-}0.1 C. In order to ensure this, we are building a system to measure the temperature of the undulators to {+-}0.01 C. This note describes the temperature measurement system under construction.

Wolf, Zachary

2010-12-13T23:59:59.000Z

349

Improving The Representation Of Human Error In The Use Of The Flight Crew Human Factors Integration Tool  

E-Print Network (OSTI)

1-15. Norman, D.A. (1983). Position paper on human error.Research Workshop on Human Error . Bellagio, Italy. O'Hare,M. (1996). Breakdown of human error models , Prepared for

Gosling, Geoffrey; Roberts, Karlene H.; Jayaswal, Arpana

1998-01-01T23:59:59.000Z

350

Efficient Adaptive Error Parameterizations for Square Root or Ensemble Kalman Filters: Application to the Control of Ocean Mesoscale Signals  

Science Conference Proceedings (OSTI)

In Kalman filter applications, an adaptive parameterization of the error statistics is often necessary to avoid filter divergence, and prevent error estimates from becoming grossly inconsistent with the real error. With the classic formulation of ...

Jean-Michel Brankart; Emmanuel Cosme; Charles-Emmanuel Testut; Pierre Brasseur; Jacques Verron

2010-03-01T23:59:59.000Z

351

VSHOT Measurements of Distal II Dish Concentrators  

DOE Green Energy (OSTI)

The Video Scanning Hartmann Optical Tester (VSHOT) is a laser ray-trace tool for measuring the slope error of solar concentrator mirrors. The VSHOT measurements made on two, 8.5-m diameter, Distal II dishes represent its first use on a concentrator installed and operating in the field. A number of valuable lessons were learned regarding the use of the VSHOT for outdoor testing. The two dishes were found to have overall figure-of-merit RMS slope errors from an ideal parabola of 2.99 and 3.18 milliradians. The VSHOT measurements compare well qualitatively with distant observer photographs made using a colored concentric ring target.

Jones, S.A.

1998-12-14T23:59:59.000Z

352

Target preparations and thickness measurements  

SciTech Connect

A wide variety of isotope target preparative methods have been used, including rolling of metals, vapor deposition, electrodeposition, chemical vapor deposition, and sputtering, to obtain thin and thick films of most elements or compounds of elements in the Periodic Table. Most thin films prepared for use in self-supported form as well as those deposited on substrates require thickness measurement (atom count and distribution) and/or thickness uniformity determination before being used in nuclear research. Preparative methods are described together with thickness and uniformity determination procedures applicable to samples being prepared (in situ) and to completed samples. Only nondestructive methods are considered applicable to target samples prepared by the ORNL Solid State Division, Isotope Research Materials Laboratory. Thickness or areal density measurements of sufficient sophistication to yield errors of less than +-1 percent have been achieved with regularity. A statistical analysis procedure is applied which avoids error caused by balance zero-point drift in direct weight measurement methods. (auth)

Adair, H.L.; Kobisk, E.H.

1975-01-01T23:59:59.000Z

353

Assessing Forecast Accuracy Measures Department of Economics  

E-Print Network (OSTI)

Assessing Forecast Accuracy Measures Zhuo Chen Department of Economics Heady Hall 260 Iowa State forecast accuracy measures. In the theoretical direction, for comparing two forecasters, only when the errors are stochastically ordered, the ranking of the forecasts is basically independent of the form

354

UWB channel measurements for accurate indoor localization  

Science Conference Proceedings (OSTI)

Recently, indoor localization has attracted considerable attention. More importantly, indoor channel measurements and models are very essential to accurate characterization of the ranging error for military applications. This paper provides the results ... Keywords: channel measurement, geolocation, path loss, ranging, ultra-wideband

Bardia Alavi; Nayef Alsindi; Kaveh Pahlavan

2006-10-01T23:59:59.000Z

355

Maximum Error Modeling for Fault-Tolerant Computation using Maximum a posteriori (MAP) Hypothesis  

E-Print Network (OSTI)

The application of current generation computing machines in safety-centric applications like implantable biomedical chips and automobile safety has immensely increased the need for reviewing the worst-case error behavior of computing devices for fault-tolerant computation. In this work, we propose an exact probabilistic error model that can compute the maximum error over all possible input space in a circuit specific manner and can handle various types of structural dependencies in the circuit. We also provide the worst-case input vector, which has the highest probability to generate an erroneous output, for any given logic circuit. We also present a study of circuit-specific error bounds for fault-tolerant computation in heterogeneous circuits using the maximum error computed for each circuit. We model the error estimation problem as a maximum a posteriori (MAP) estimate, over the joint error probability function of the entire circuit, calculated efficiently through an intelligent search of the entire input space using probabilistic traversal of a binary join tree using Shenoy-Shafer algorithm. We demonstrate this model using MCNC and ISCAS benchmark circuits and validate it using an equivalent HSpice model. Both results yield the same worst-case input vectors and the highest % difference of our error model over HSpice is just 1.23%. We observe that the maximum error probabilities are significantly larger than the average error probabilities, and provides a much tighter error bounds for fault-tolerant computation. We also find that the error estimates depend on the specific circuit structure and the maximum error probabilities are sensitive to the individual gate failure probabilities.

Karthikeyan Lingasubramanian; Syed M. Alam; Sanjukta Bhanja

2009-06-17T23:59:59.000Z

356

Range dependent errors in the convective and stratiform partitioning of a radar precipitation estimation algorithm  

E-Print Network (OSTI)

The Tropical Rainfall Measuring Mission (TRMM), designed to assist climate and atmospheric circulation modeling efforts by providing accurate information on tropical precipitation and latent-heat release, will require ground based validation of satellite derived rainfall totals and type classification. A key element in ground validation is the precipitation classification method authored by Steiner and Houze. The method partitions precipitation by type using a radar reflectivity threshold technique. Steiner and Houze report a lack of any significant range dependency, despite the normal problems associated with beam spreading and increasing altitude with range. This study will examine the Steiner and Houze classification method to quantify the effect of range dependent problems in discerning precipitation type. Radar data for this study were collected on January 10 and 18, 1993 during the Tropical Ocean Global Atmosphere (TOGA) Coupled Ocean-Atmosphere Response Experiment (COARE), by the National Oceanic and Atmospheric Administration (NOAA) N42RF WP-3D Orion aircraft's tail Doppler radar as well as the Massachusetts Institute of Technology's (MIT) Doppler radar deployed on board the United States research vessel Vickers. The data were chosen so the PW-3D tail radar data set maintained low ranges to precipitation of interest while the MIT radar data set possessed a wide variation of range. Possible error sources such as position error, radar calibration error, and temporal data collection differences, were minimized so that range dependency could be focused on. Range dependent beam spreading influenced precipitation classification over the largest span of ranges, and the greatest portion of the data. Also, beam spreading was found to increase the horizontal extent of precipitation areas in a direction perpendicular to the central axis of the radar beam. Overall, using the Steiner and Houze classification method, 24.0% and 21.6% of the precipitation with reflectivity greater than 15 dBZ was classified differently by the two radar data sets at the 1.5 km and 3.0 km analysis levels respectively. The percentage of total rainfall from all precipitation classified differently was 26% for the 1.5 km analysis level, and 28% for the 3.0 km level.

Wood, David Richard

1996-01-01T23:59:59.000Z

357

Pollution error in the h-version of the finite-element method and the local quality of a-posteriori error estimators  

E-Print Network (OSTI)

In this work we study the pollution-error in the h-version of the finite element method and its effect on the local quality of a-posteriori error estimators. We show that the pollution-effect in an interior subdomain depends on the relationship between the mesh inside and outside the subdomain and the smoothness of the exact solution. We also demonstrate that it is possible to guarantee the quality of local error-estimators in the interior of a finite-element mesh-subdomain of interest by employing meshes which are sufficiently refined outside the subdomain.

Mathur, Anuj

1994-01-01T23:59:59.000Z

358

Analysis of personnel error occurrence reports across Defense Program facilities  

Science Conference Proceedings (OSTI)

More than 2,000 reports from the Occurrence Reporting and Processing System (ORPS) database were examined in order to identify weaknesses in the implementation of the guidance for the Conduct of Operations (DOE Order 5480.19) at Defense Program (DP) facilities. The analysis revealed recurrent problems involving procedures, training of employees, the occurrence of accidents, planning and scheduling of daily operations, and communications. Changes to DOE 5480.19 and modifications of the Occurrence Reporting and Processing System are recommended to reduce the frequency of these problems. The primary tool used in this analysis was a coding scheme based on the guidelines in 5480.19, which was used to classify the textual content of occurrence reports. The occurrence reports selected for analysis came from across all DP facilities, and listed personnel error as a cause of the event. A number of additional reports, specifically from the Plutonium Processing and Handling Facility (TA55), and the Chemistry and Metallurgy Research Facility (CMR), at Los Alamos National Laboratory, were analyzed separately as a case study. In total, 2070 occurrence reports were examined for this analysis. A number of core issues were consistently found in all analyses conducted, and all subsets of data examined. When individual DP sites were analyzed, including some sites which have since been transferred, only minor variations were found in the importance of these core issues. The same issues also appeared in different time periods, in different types of reports, and at the two Los Alamos facilities selected for the case study.

Stock, D.A.; Shurberg, D.A.; O`Brien, J.N.

1994-05-01T23:59:59.000Z

359

A surrogate-based uncertainty quantification with quantifiable errors  

Science Conference Proceedings (OSTI)

Surrogate models are often employed to reduce the computational cost required to complete uncertainty quantification, where one is interested in propagating input parameters uncertainties throughout a complex engineering model to estimate responses uncertainties. An improved surrogate construction approach is introduced here which places a premium on reducing the associated computational cost. Unlike existing methods where the surrogate is constructed first, then employed to propagate uncertainties, the new approach combines both sensitivity and uncertainty information to render further reduction in the computational cost. Mathematically, the reduction is described by a range finding algorithm that identifies a subspace in the parameters space, whereby parameters uncertainties orthogonal to the subspace contribute negligible amount to the propagated uncertainties. Moreover, the error resulting from the reduction can be upper-bounded. The new approach is demonstrated using a realistic nuclear assembly model and compared to existing methods in terms of computational cost and accuracy of uncertainties. Although we believe the algorithm is general, it will be applied here for linear-based surrogates and Gaussian parameters uncertainties. The generalization to nonlinear models will be detailed in a separate article. (authors)

Bang, Y.; Abdel-Khalik, H. S. [North Carolina State Univ., Raleigh, NC 27695 (United States)

2012-07-01T23:59:59.000Z

360

Plasma dynamics and a significant error of macroscopic averaging  

E-Print Network (OSTI)

The methods of macroscopic averaging used to derive the macroscopic Maxwell equations from electron theory are methodologically incorrect and lead in some cases to a substantial error. For instance, these methods do not take into account the existence of a macroscopic electromagnetic field EB, HB generated by carriers of electric charge moving in a thin layer adjacent to the boundary of the physical region containing these carriers. If this boundary is impenetrable for charged particles, then in its immediate vicinity all carriers are accelerated towards the inside of the region. The existence of the privileged direction of acceleration results in the generation of the macroscopic field EB, HB. The contributions to this field from individual accelerated particles are described with a sufficient accuracy by the Lienard-Wiechert formulas. In some cases the intensity of the field EB, HB is significant not only for deuteron plasma prepared for a controlled thermonuclear fusion reaction but also for electron plasma in conductors at room temperatures. The corrected procedures of macroscopic averaging will induce some changes in the present form of plasma dynamics equations. The modified equations will help to design improved systems of plasma confinement.

Marek A. Szalek

2005-05-22T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

The robustness of magic state distillation against errors in Clifford gates  

E-Print Network (OSTI)

Quantum error correction and fault-tolerance have provided the possibility for large scale quantum computations without a detrimental loss of quantum information. A very natural class of gates for fault-tolerant quantum computation is the Clifford gate set and as such their usefulness for universal quantum computation is of great interest. Clifford group gates augmented by magic state preparation give the possibility of simulating universal quantum computation. However, experimentally one cannot expect to perfectly prepare magic states. Nonetheless, it has been shown that by repeatedly applying operations from the Clifford group and measurements in the Pauli basis, the fidelity of noisy prepared magic states can be increased arbitrarily close to a pure magic state [1]. We investigate the robustness of magic state distillation to perturbations of the initial states to arbitrary locations in the Bloch sphere due to noise. Additionally, we consider a depolarizing noise model on the quantum gates in the decoding section of the distillation protocol and demonstrate its effect on the convergence rate and threshold value. Finally, we establish that faulty magic state distillation is more efficient than fault-tolerance-assisted magic state distillation at low error rates due to the large overhead in the number of quantum gates and qubits required in a fault-tolerance architecture. The ability to perform magic state distillation with noisy gates leads us to conclude that this could be a realistic scheme for future small-scale quantum computing devices as fault-tolerance need only be used in the final steps of the protocol.

Tomas Jochym-O'Connor; Yafei Yu; Bassam Helou; Raymond Laflamme

2012-05-30T23:59:59.000Z

362

A posteriori error estimates for finite volume approximations of elliptic equations on general surfaces  

SciTech Connect

In this paper, we present a residual-based a posteriori error estimate for the finite volume discretization of steady convection– diffusion–reaction equations defined on surfaces in R3, which are often implicitly represented as level sets of smooth functions. Reliability and efficiency of the proposed a posteriori error estimator are rigorously proved. Numerical experiments are also conducted to verify the theoretical results and demonstrate the robustness of the error estimator.

Ju, Lili [University of South Carolina; Tian, Li [University of South Carolina; Wang, Desheng [Nanyang Technological University

2009-01-01T23:59:59.000Z

363

Addressing network-on-chip router transient errors with inherent information redundancy  

Science Conference Proceedings (OSTI)

We exploit the inherent information redundancy in the control path of Network-on-Chip (NoC) routers to manage transient errors, preventing packet loss and misrouting. Outputs of the routing arbitration units in NoC routers can be used to determine arbitration ... Keywords: Networks-on-chip, arbiter, error control coding, information redundancy, on-chip interconnect, router, transient error, triple-modular redundancy

Qiaoyan Yu, Meilin Zhang, Paul Ampadu

2013-06-01T23:59:59.000Z

364

Method and apparatus for detecting timing errors in a system oscillator  

DOE Patents (OSTI)

This invention is comprised of a method of detecting timing errors in a system oscillator for an electronic device, such as a power supply, includes the step of comparing a system oscillator signal with a delayed generated signal and generating a signal representative of the timing error when the system oscillator signal is not identical to the delayed signal. An LED indicates to an operator that a timing error has occurred. A hardware circuit implements the above-identified method.

Gliebe, R.J.; Kramer, W.R.

1991-12-31T23:59:59.000Z

365

Method and apparatus for detecting timing errors in a system oscillator  

DOE Patents (OSTI)

A method of detecting timing errors in a system oscillator for an electronic device, such as a power supply, includes the step of comparing a system oscillator signal with a delayed generated signal and generating a signal representative of the timing error when the system oscillator signal is not identical to the delayed signal. An LED indicates to an operator that a timing error has occurred. A hardware circuit implements the above-identified method.

Gliebe, Ronald J. (Library, PA); Kramer, William R. (Bethel Park, PA)

1993-01-01T23:59:59.000Z

366

BEAM RELATED SYSTEMATICS IN HIGGS BOSON MASS MEASUREMENT  

E-Print Network (OSTI)

BEAM RELATED SYSTEMATICS IN HIGGS BOSON MASS MEASUREMENT A.RASPEREZA DESY, Notkestrasse 85, D­22607#erential luminosity spectrum measurements and beam energy spread on the precision of the Higgs boson mass measurement possible impact of the beam related systematic errors on the Higgs boson mass measurement is discussed

367

Complexity of measurement of a qubit pair  

E-Print Network (OSTI)

Analysis of the process of accumulation of the results of measurements shows that the success of this process substantially depends on the possibility of coordination of actions of two participants of the process - preparator who prepares the series of the states being measured and registrator who chooses in each event of measurement one of incompatible observables. A new value, the complexity of measurement of a state, is used, this characterizes the number of the measurement events needed for solution of the reconstruction problem. By means of this value it is shown that the dependence of the upper limit of the needed number of measurements on the permissible error is a square law one, so a twofold decrease of permissible error corresponds to a fourfold increase of needed number of measurements.

Constantin V. Usenko

2013-09-24T23:59:59.000Z

368

Modeling, Error Analysis, and Evaluation of Dual-Polarization Variables Obtained from Simultaneous Horizontal and Vertical Polarization Transmit Radar. Part I: Modeling and Antenna Errors  

Science Conference Proceedings (OSTI)

In this two-part paper the biases of polarimetric variables from simultaneous horizontally and vertically transmitted (SHV) data are investigated. Here, in Part I, a radar-scattering model is developed and antenna polarization errors are ...

J. C. Hubbert; S. M. Ellis; M. Dixon; G. Meymaris

2010-10-01T23:59:59.000Z

369

Effect of geometric and motion tracking error for awake small animal SPECT  

SciTech Connect

A series of simulation studies were performed to evaluate the effects of geometric and motion tracking errors on reconstruction image quality for a single pinhole collimator awake animal imaging SPECT system. List-mode SPECT data generated using a custom Monte Carlo program that incorporated experimental mouse motion data were reconstructed by MLEM with Siddon's ray tracing. To better understand the impact of motion tracking and system geometric parameter errors on reconstructed system data, an offset of up to 1 mm or degree was separately applied to each for evaluation. In the absence of motion tracking or system geometric error, the applied motion compensation algorithm successfully reconstructed volumes without any degradation or distortion. Presented results reveal that motion tracking errors propagate through the SPECT reconstruction process. However, it is confirmed that the impact of tracking errors in the currently employed motion tracking system, is minimal because of their accuracy. The results also reveal the direct and indirect impact of geometric errors to motion compensated reconstruction quality and that a wrong assumption of pinhole transaxial position produces the most amount of distortion of all the investigated errors. Finally, system geometric errors are shown to have a greater impact on reconstruction quality than equivalent tracking errors.

S.J. Lee, J.S. Baba, J. S. Goddard, A. Stolin, J. McKisson, A.G. Weisenberger, M.F. Smith

2010-01-01T23:59:59.000Z

370

High-speed Energy-efficient Soft Error Tolerant Flip-flops.  

E-Print Network (OSTI)

??Single event upset (SEU) or soft error caused by alpha particles and cosmic neutrons has emerged as a key reliability concern in nanoscale CMOS technologies.… (more)

Islam, Riadul

2011-01-01T23:59:59.000Z

371

V-172: ISC BIND RUNTIME_CHECK Error Lets Remote Users Deny Service Against Recursive Resolvers  

Energy.gov (U.S. Department of Energy (DOE))

A defect exists which allows an attacker to crash a BIND 9 recursive resolver with a RUNTIME_CHECK error in resolver.c

372

Error Sensor Placement for Active Control of an Axial Cooling Fan.  

E-Print Network (OSTI)

??Recent experimental achievements in active noise control (ANC) for cooling fans have used near-field error sensors whose locations are determined according to a theoretical condition… (more)

Shafer, Benjamin M 1979-

2007-01-01T23:59:59.000Z

373

Towards grammaticality and fluency : characterizing and correcting ESL errors using dictionary random walks and other means  

E-Print Network (OSTI)

Korean Dictionary . . . . . . . . . . . . . 3.2 Language andExample English-Korean dictionary graph for a subset of theand Correcting ESL Errors Using Dictionary Random Walks and

West, Randy

2011-01-01T23:59:59.000Z

374

Error analysis of motion transmission mechanisms : design of a parabolic solar trough.  

E-Print Network (OSTI)

??This thesis presents the error analysis pertaining to the design of an innovative solar trough for use in solar thermal energy generation fields. The research… (more)

Koniski, Cyril (Cyril A.)

2009-01-01T23:59:59.000Z

375

The relationship between present large?scale forecast skill and new estimates of predictability error growth  

Science Conference Proceedings (OSTI)

Several new methods of verification are defined and tested on forecast error of current numerical models. The methods incorporate a notion of ‘‘usefulness’’ which is determined by placing upper and lower bounds on the error growth. The lower bound is derived from new estimates of predictability error growth produced by the NCAR Community Climate Model. The fields are spectrally decomposed to highlight forecast skill in various scales. The verification techniques are applied to forecast errors from the NMC and ECMWF operational models during 1979–82.

David P. Baumhefner

1984-01-01T23:59:59.000Z

376

"RSE Table N11.1. Relative Standard Errors for Table N11.1;...  

U.S. Energy Information Administration (EIA) Indexed Site

1. Relative Standard Errors for Table N11.1;" " Unit: Percents." " "," " "NAICS"," "," ",,"Residual","Distillate",,"LPG and",,"Coke"," " "Code(a)","Subsector and...

377

Rainfall Measurement in Canada: Changing Observational Methodsand Archive Adjustment Procedures  

Science Conference Proceedings (OSTI)

Precipitation is one of the key components in hydrologic modeling and process studies; however, it is widely recognized that significant errors in the measurement of precipitation exist. During its 150-yr history, the Canadian Meteorological ...

J. R. Metcalfe; B. Routledge; K. Devine

1997-01-01T23:59:59.000Z

378

Statistical and systematic errors for gravitational-wave inspiral signals: A principal component analysis  

E-Print Network (OSTI)

Identifying the source parameters from a gravitational-wave measurement alone is limited by our ability to discriminate signals from different sources and the accuracy of the waveform family employed in the search. Here we address both issues in the framework of an adapted coordinate system that allows for linear Fisher-matrix type calculations of waveform differences that are both accurate and computationally very efficient. We investigate statistical errors by using principal component analysis of the post-Newtonian (PN) expansion coefficients, which is well conditioned despite the Fisher matrix becoming ill conditioned for larger numbers of parameters. We identify which combinations of physical parameters are most effectively measured by gravitational-wave detectors for systems of neutron stars and black holes with aligned spin. We confirm the expectation that the dominant parameter of the inspiral waveform is the chirp mass. The next dominant parameter depends on a combination of the spin and the symmetric mass ratio. In addition, we can study the systematic effect of various spin contributions to the PN phasing within the same parametrization, showing that the inclusion of spin-orbit corrections up to next-to-leading order, but not necessarily of spin-spin contributions, is crucial for an accurate inspiral waveform model. This understanding of the waveform structure throughout the parameter space is important to set up an efficient search strategy and correctly interpret future gravitational-wave observations.

Frank Ohme; Alex B. Nielsen; Drew Keppel; Andrew Lundgren

2013-04-25T23:59:59.000Z

379

ADCP Velocity Errors from Pelagic Fish Schooling around Equatorial Moorings*  

Science Conference Proceedings (OSTI)

Beginning in 1990, PROTEUS (profile telemetry of upper ocean currents) moorings have been deployed in the equatorial Pacific with the ability to transmit ocean current measurements to shore in real time via satellite. The surface moorings were ...

Patricia E. Plimpton; H. Paul Freitag; Michael J. McPhaden

1997-10-01T23:59:59.000Z

380

Estimation of TAMDAR Observational Error and Assimilation Experiments  

Science Conference Proceedings (OSTI)

Tropospheric Airborne Meteorological Data Reporting (TAMDAR) observations are becoming a major data source for numerical weather prediction (NWP) because of the advantages of their high spatiotemporal resolution and humidity measurements. In this ...

Feng Gao; Xiaoyan Zhang; Neil A. Jacobs; Xiang-Yu Huang; Xin Zhang; Peter P. Childs

2012-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

A Procedure for Correcting Radiosonde Reports for Radiation Errors  

Science Conference Proceedings (OSTI)

Temperature sensors on radiosondes measure a temperature that is a balance between the temperature of the air and the temperature of the radiation environment of the sensor. Because of this balance, the temperature reported by a radiosonde ...

Larry McMillin; Michael Uddstrom; Alessandro Coletti

1992-12-01T23:59:59.000Z

382

Ensemble Statistics and Error Covariance of a Rapidly Intensifying Hurricane  

E-Print Network (OSTI)

This thesis presents an investigation of ensemble Gaussianity, the effect of non- Gaussianity on covariance structures, storm-centered data assimilation techniques, and the relationship between commonly used data assimilation variables and the underlying dynamics for the case of Hurricane Humberto. Using an Ensemble Kalman Filter (EnKF), a comparison of data assimilation results in Storm-centered and Eulerian coordinate systems is made. In addition, the extent of the non-Gaussianity of the model ensemble is investigated and quantified. The effect of this non-Gaussianity on covariance structures, which play an integral role in the EnKF data assimilation scheme, is then explored. Finally, the correlation structures calculated from a Weather Research Forecast (WRF) ensemble forecast of several state variables are investigated in order to better understand the dynamics of this rapidly intensifying cyclone. Hurricane Humberto rapidly intensified in the northwestern Gulf of Mexico from a tropical disturbance to a strong category one hurricane with 90 mph winds in 24 hours. Numerical models did not capture the intensification of Humberto well. This could be due in large part to initial condition error, which can be addressed by data assimilation schemes. Because the EnKF scheme is a linear theory developed on the assumption of the normality of the ensemble distribution, non-Gaussianity in the ensemble distribution used could affect the EnKF update. It is shown that multiple state variables do indeed show significant non-Gaussianity through an inspection of statistical moments. In addition, storm-centered data assimilation schemes present an alternative to traditional Eulerian schemes by emphasizing the centrality of the cyclone to the assimilation window. This allows for an update that is most effective in the vicinity of the storm center, which is of most concern in mesoscale events such as Humberto. Finally, the effect of non-Gaussian distributions on covariance structures is examined through data transformations of normal distributions. Various standard transformations of two Gaussian distributions are made. Skewness, kurtosis, and correlation between the two distributions are taken before and after the transformations. It can be seen that there is a relationship between a change in skewness and kurtosis and the correlation between the distributions. These effects are then taken into consideration as the dynamics contributing to the rapid intensification of Humberto are explored through correlation structures.

Rigney, Matthew C.

2009-05-01T23:59:59.000Z

383

RSE Table 3.5 Relative Standard Errors for Table 3.5  

U.S. Energy Information Administration (EIA) Indexed Site

5 Relative Standard Errors for Table 3.5;" 5 Relative Standard Errors for Table 3.5;" " Unit: Percents." " "," "," "," "," "," "," "," ","Waste",," " " "," "," ","Blast"," "," ","Pulping Liquor"," ","Oils/Tars" "NAICS"," "," ","Furnace/Coke","Waste","Petroleum","or","Wood Chips,","and Waste" "Code(a)","Subsector and Industry","Total","Oven Gases","Gas","Coke","Black Liquor","Bark","Materials"

384

An accurate approximation to the average error probability of cooperative diversity in Nakagami-m fading  

Science Conference Proceedings (OSTI)

A new approximation to the average symbol error rate of cooperative diversity is derived for independent and non-identically distributed Nakagami-m fading channels. The new approximation has the same computational complexity as previous lower bounds ... Keywords: Nakagami, cooperative diversity, fading channels, symbol error rate

Norman C. Beaulieu; Yunfei Chen

2010-09-01T23:59:59.000Z

385

On the exploitation of the inherent error resilience of wireless systems under unreliable silicon  

Science Conference Proceedings (OSTI)

In this paper, we investigate the impact of circuit misbehavior due to parametric variations and voltage scaling on the performance of wireless communication systems. Our study reveals the inherent error resilience of such systems and argues that sufficiently ... Keywords: energy-efficiency, error-resiliency, memory failures, reliability, wireless communication systems, yield

Georgios Karakonstantis; Christoph Roth; Christian Benkeser; Andreas Burg

2012-06-01T23:59:59.000Z

386

Classifying soft error vulnerabilities in extreme-scale scientific applications using a binary instrumentation tool  

Science Conference Proceedings (OSTI)

Extreme-scale scientific applications are at a significant risk of being hit by soft errors on supercomputers as the scale of these systems and the component density continues to increase. In order to better understand the specific soft error vulnerabilities ...

Dong Li; Jeffrey S. Vetter; Weikuan Yu

2012-11-01T23:59:59.000Z

387

Exploring phrasal context and error correction heuristics in bootstrapping for geographic named entity annotation  

Science Conference Proceedings (OSTI)

Geographic named entities can be classified into many sub-types that are useful for applications such as information extraction and question answering. In this paper, we present a high-performance bootstrapping algorithm with error correction heuristics ... Keywords: Bootstrapping, Error correcting heuristics, Geographic named entity annotation, Location normalization, Phrasal context

Seungwoo Lee; Gary Geunbae Lee

2007-06-01T23:59:59.000Z

388

Pipelined successive approximation conversion (PSAC) with error correction for a CMOS ophthalmic sensor  

Science Conference Proceedings (OSTI)

The purpose of this work is the proposal of a 10-Bit / 1 MSPS Analog to Digital Converter (ADC) with error correction to match the requirements of a CMOS wavefront sensor for ophthalmic applications. The developed ADC is a combination of different techniques ... Keywords: ADC, error correction, pipelined SAC

Frank Sill; Davies W. de Lima Monteiro

2009-08-01T23:59:59.000Z

389

A Design of Reconfigurable Satellite Control System with Reaction Wheels Based on Error Quaternion Model  

Science Conference Proceedings (OSTI)

To meet the requirement of the satellite attitude and orbit control system (AOCS) could recover control in abnormal conditions, A reconfigurable control system using variable-structure control and improved pseudo-inverse is developed based on the error ... Keywords: pseudo-inverse, variable-structure, reconfigurable, reaction wheel, error quaternion

Peijun Yu; Keqiang Xia; Jiancheng Li

2011-09-01T23:59:59.000Z

390

Error Analysis and Sampling Strategy Design for Using Fixed or Mobile Platforms to Estimate Ocean Flux  

Science Conference Proceedings (OSTI)

For estimating lateral flux in the ocean using fixed or mobile platforms, the authors present a method of analyzing the estimation error and designing the sampling strategy. When an array of moorings is used, spatial aliasing leads to an error in ...

Yanwu Zhang; James G. Bellingham; Yi Chao

2010-03-01T23:59:59.000Z

391

Coding-error based defects in enterprise resource planning software: Prevention, discovery, elimination and mitigation  

Science Conference Proceedings (OSTI)

Software defects due to coding errors continue to plague the industry with disastrous impact, especially in the enterprise application software category. Identifying how much of these defects are specifically due to coding errors is a challenging problem. ... Keywords: Code auditing, Coding defects, Defect density, Defect reduction, ERP, Software development, Software testing, Static code analysis

Isaac Woungang; Felix O. Akinladejo; David W. White; Mohammad S. Obaidat

2012-07-01T23:59:59.000Z

392

Poster: Passing the three trillion particle limit with an error-controlled fast multipole method  

Science Conference Proceedings (OSTI)

We present an error-controlled, highly scalable FMM implementation for long-range interactions of particle systems with open, 1D, 2D and 3D periodic boundary conditions. We highlight three aspects of fast summation codes not fully addressed in most articles; ... Keywords: FMM, error control, scalability

Ivo Kabadshow; Holger Dachsel; Jeff Hammond

2011-11-01T23:59:59.000Z

393

A Case for Soft Error Detection and Correction in Computational Chemistry  

SciTech Connect

High performance computing platforms are expected to deliver 10(18) floating operations per second by the year 2022 through the deployment of millions of cores. Even if every core is highly reliable the sheer number of the them will mean that the mean time between failures will become so short that most applications runs will suffer at least one fault. In particular soft errors caused by intermittent incorrect behavior of the hardware are a concern as they lead to silent data corruption. In this paper we investigate the impact of soft errors on optimization algorithms using Hartree-Fock as a particular example. Optimization algorithms iteratively reduce the error in the initial guess to reach the intended solution. Therefore they may intuitively appear to be resilient to soft errors. Our results show that this is true for soft errors of small magnitudes but not for large errors. We suggest error detection and correction mechanisms for different classes of data structures. The results obtained with these mechanisms indicate that we can correct more than 95% of the soft errors at moderate increases in the computational cost.

van Dam, Hubertus JJ; Vishnu, Abhinav; De Jong, Wibe A.

2013-09-10T23:59:59.000Z

394

ERROR ESTIMATES FOR FINITE DIFFERENCE METHODS FOR A WIDE-ANGLE `PARABOLIC' EQUATION  

E-Print Network (OSTI)

ERROR ESTIMATES FOR FINITE DIFFERENCE METHODS FOR A WIDE-ANGLE `PARABOLIC' EQUATION G. D. AKRIVIS-value problem for a third-order p.d.e., a wide-angle `parabolic' equation frequently used in underwater. wide-angle `parabolic' equation, Underwater Acoustics, finite difference error esti- mates, interface

Akrivis, Georgios

395

Distributed Forcing of Forecast and Assimilation Error Systems BRIAN F. FARRELL  

E-Print Network (OSTI)

Distributed Forcing of Forecast and Assimilation Error Systems BRIAN F. FARRELL Division forecast system gov- erning forecast error growth and the tangent linear observer system governing deterministic and stochastic forcings of the forecast and observer systems over a chosen time interval

Farrell, Brian F.

396

Response of model simulated weather parameters to round-off-errors on different systems  

Science Conference Proceedings (OSTI)

In this study, the weather forecasting model of the National Centre for Medium Range Weather Forecasting (NCMRWF) is used for examining the characteristics of round-off-errors on three different computer architectures - PARAM 10K, SUNFIRE 6800 and Dec ... Keywords: Floating-point arithmetic, General Circulation Model (GCM), Iterative process, Model simulation, Round-off-errors, Spectral method

S. Goel; S. K. Dash

2007-08-01T23:59:59.000Z

397

Protection against soft errors in the space environment: A finite impulse response (FIR) filter case study  

Science Conference Proceedings (OSTI)

The problem of radiation is a key issue in Space applications, since it produces several negative effects on digital circuits. Considering the high reliability expected in these systems, many techniques have been proposed to mitigate these effects. However, ... Keywords: Digital filters, Error detection and correction codes, Fault tolerance, Radiation, Soft errors

J. A. Maestro; P. Reviriego; P. Reyes; O. Ruano

2009-02-01T23:59:59.000Z

398

Inference of restricted stochastic boolean GRN's by Bayesian error and entropy based criteria  

Science Conference Proceedings (OSTI)

This work compares two frequently used criterion functions in inference of gene regulatory networks (GRN), one based on Bayesian error and another based on conditional entropy. The network model utilized was the stochastic restricted Boolean network ... Keywords: Bayesian error, entropy, feature selection, gene regulatory networks inference, stochastic restricted Boolean network models

David Correa Martins, Jr.; Evaldo Araújo De Oliveira; Vitor Hugo Louzada; Ronaldo Fumio Hashimoto

2010-11-01T23:59:59.000Z

399

TREATMENT OF CORRELATED ERRORS IN GEOMAGNETIC MODELLING -TOWARDS THE SWARM MISSION  

E-Print Network (OSTI)

TREATMENT OF CORRELATED ERRORS IN GEOMAGNETIC MODELLING - TOWARDS THE SWARM MISSION Richard Holme close to midnight LT · Total intensity data only above 50o geomagnetic latitude (reduce effect of field. CONCLUSIONS · Large along-track correlated errors in satellite data · These limit resolution of geomagnetic

400

Error Climatology of the 80-Wave Medium-Range Forecast Model  

Science Conference Proceedings (OSTI)

A climatology of the once-daily (0000 UTC) 1000-hPa error fields of the National Meteorological Center's 80-wave Medium-Range Forecast (MRF) model is studied. An analysis of the error field has been conducted over the contiguous United States and ...

David R. Walker; Robert E. Davis

1995-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

U-039: ISC Update: BIND 9 Resolver crashes after logging an error in  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

9: ISC Update: BIND 9 Resolver crashes after logging an error 9: ISC Update: BIND 9 Resolver crashes after logging an error in query.c U-039: ISC Update: BIND 9 Resolver crashes after logging an error in query.c November 16, 2011 - 2:30pm Addthis PROBLEM: ISC Update: BIND 9 Resolver crashes after logging an error in query.c. PLATFORM: Versions of BIND, 9.4-ESV, 9.6-ESV, 9.7.x, 9.8.x ABSTRACT: A remote server can cause the target connected client to crash. Organizations across the Internet are reporting crashes interrupting service on BIND 9 nameservers performing recursive queries. Affected servers crash after logging an error in query.c with the following message: "INSIST(! dns_rdataset_isassociated(sigrdataset))" Multiple versions are reported as being affected, including all currently supported release versions of ISC BIND 9. ISC is actively investigating the root cause and

402

V-109: Google Chrome WebKit Type Confusion Error Lets Remote Users Execute  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

09: Google Chrome WebKit Type Confusion Error Lets Remote Users 09: Google Chrome WebKit Type Confusion Error Lets Remote Users Execute Arbitrary Code V-109: Google Chrome WebKit Type Confusion Error Lets Remote Users Execute Arbitrary Code March 12, 2013 - 12:11am Addthis PROBLEM: Google Chrome WebKit Type Confusion Error Lets Remote Users Execute Arbitrary Code PLATFORM: Google Chrome prior to 25.0.1364.160 ABSTRACT: A vulnerability was reported in Google Chrome. REFERENCE LINKS: Stable Channel Update SecurityTracker Alert ID: 1028266 CVE-2013-0912 IMPACT ASSESSMENT: Medium DISCUSSION: A remote user can cause arbitrary code to be executed on the target user's system. A remote user can create specially crafted HTML that, when loaded by the target user, will trigger a type confusion error in WebKit and execute arbitrary code on the target system. The code will run with the privileges

403

T-571: Linux Kernel dns_resolver Key Processing Error Lets Local Users Deny  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1: Linux Kernel dns_resolver Key Processing Error Lets Local 1: Linux Kernel dns_resolver Key Processing Error Lets Local Users Deny Services T-571: Linux Kernel dns_resolver Key Processing Error Lets Local Users Deny Services March 7, 2011 - 3:05pm Addthis PROBLEM: Linux Kernel dns_resolver Key Processing Error Lets Local Users Deny Services. PLATFORM: Linux Kernel 2.6.37 and prior versions ABSTRACT: A vulnerability was reported in the Linux Kernel. A local user can cause denial of service conditions. reference LINKS: SecurityTracker Alert ID:1025162 Latest Stable Kernel CVE-2011-1076 IMPACT ASSESSMENT: High Discussion: When a DNS resolver key is instantiated with an error indication, a local user can attempt to read the key to trigger a null pointer dereference and cause a kernel crash. A local user can cause the target system to crash.

404

U-064: Adobe Acrobat/Reader PRC Memory Corruption Error Lets Remote Users  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

4: Adobe Acrobat/Reader PRC Memory Corruption Error Lets Remote 4: Adobe Acrobat/Reader PRC Memory Corruption Error Lets Remote Users Execute Arbitrary Code U-064: Adobe Acrobat/Reader PRC Memory Corruption Error Lets Remote Users Execute Arbitrary Code December 19, 2011 - 9:15am Addthis PROBLEM: Adobe Acrobat/Reader PRC Memory Corruption Error Lets Remote Users Execute Arbitrary Code. PLATFORM: Adobe Acrobat Reader Version(s): 10.1.1 and prior versions ABSTRACT: A vulnerability was reported in Adobe Acrobat/Reader, this vulnerability is being actively exploited against Windows-based systems. reference LINKS: SecurityTracker Alert ID: 1026432 APSB11-30 CVE-2011-4369 JC3-CIRC Tech Bulletin U-054 APSA11-04 IMPACT ASSESSMENT: High Discussion: A remote user can create a specially crafted PDF file that, when loaded by the target user, will trigger a memory corruption error in the PRC

405

T-669: Linux Kernel GFS2 Allocation Error Lets Local Users Deny Service |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

69: Linux Kernel GFS2 Allocation Error Lets Local Users Deny 69: Linux Kernel GFS2 Allocation Error Lets Local Users Deny Service T-669: Linux Kernel GFS2 Allocation Error Lets Local Users Deny Service July 15, 2011 - 2:14am Addthis PROBLEM: A vulnerability was reported in the Linux Kernel. A local user can cause denial of service conditions. PLATFORM: 2.6.39 and prior versions ABSTRACT: Linux Kernel GFS2 Allocation Error Lets Local Users Deny Service. references LINKS: SecurityTracker Alert ID: 1025776 Linux Kernel Updates CVE-2011-2689 IMPACT ASSESSMENT: Medium Discussion: A local user can invoke the gfs2_fallocate() function in 'fs/gfs2/file.c' in certain cases to allocate a non-blksize aligned amount, resulting in an error in subsequent code that requires blksize aligned offsets. Impact: A local user can cause denial of service conditions on the target system.

406

U-243: libvirt virTypedParameterArrayClear() Memory Access Error Lets  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

3: libvirt virTypedParameterArrayClear() Memory Access Error 3: libvirt virTypedParameterArrayClear() Memory Access Error Lets Remote Users Deny Service U-243: libvirt virTypedParameterArrayClear() Memory Access Error Lets Remote Users Deny Service August 24, 2012 - 7:00am Addthis PROBLEM: libvirt virTypedParameterArrayClear() Memory Access Error Lets Remote Users Deny Service PLATFORM: Version(s): 0.9.13 and prior ABSTRACT: A vulnerability was reported in libvirt. reference LINKS: libvirt SecurityTracker Alert ID: 1027437 Secunia Advisory SA50118 Bugtraq ID: 54748 CVE-2012-3445 IMPACT ASSESSMENT: Medium Discussion A remote user can send a specially crafted RPC call with the number of parameters set to zero to libvirtd to trigger a memory access error in virTypedParameterArrayClear() and cause the target service to crash. Impact:

407

V-194: Citrix XenServer Memory Management Error Lets Local Administrative  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

4: Citrix XenServer Memory Management Error Lets Local 4: Citrix XenServer Memory Management Error Lets Local Administrative Users on the Guest Gain Access on the Host V-194: Citrix XenServer Memory Management Error Lets Local Administrative Users on the Guest Gain Access on the Host July 8, 2013 - 12:24am Addthis PROBLEM: Citrix XenServer Memory Management Error Lets Local Administrative Users on the Guest Gain Access on the Host PLATFORM: Citrix XenServer 5.0 - 6.2 ABSTRACT: A vulnerability was reported in Citrix XenServer. REFERENCE LINKS: CTX138134 SecurityTracker Alert ID: 1028740 CVE-2013-1432 IMPACT ASSESSMENT: Medium DISCUSSION: A local administrative user on a PV guest can exploit a memory management page reference counting error to gain access on the target host server. IMPACT: A local user on the guest operating system can obtain access on the target

408

Reducing intrinsic decoherence in a superconducting circuit by quantum error detection  

E-Print Network (OSTI)

A fundamental challenge for quantum information processing is reducing the impact of environmentally-induced errors. Quantum error detection (QED) provides one approach to handling such errors, in which errors are rejected when they are detected. Here we demonstrate a QED protocol based on the idea of quantum un-collapsing, using this protocol to suppress energy relaxation due to the environment in a three-qubit superconducting circuit. We encode quantum information in a target qubit, and use the other two qubits to detect and reject errors caused by energy relaxation. This protocol improves the storage time of a quantum state by a factor of roughly three, at the cost of a reduced probability of success. This constitutes the first experimental demonstration of an algorithm-based improvement in the lifetime of a quantum state stored in a qubit.

Y. P. Zhong; Z. L. Wang; John M. Martinis; A. N. Cleland; A. N. Korotkov; H. Wang

2013-09-01T23:59:59.000Z

409

Graphical algorithms and threshold error rates for the 2d colour code  

E-Print Network (OSTI)

Recent work on fault-tolerant quantum computation making use of topological error correction shows great potential, with the 2d surface code possessing a threshold error rate approaching 1% (NJoP 9:199, 2007), (arXiv:0905.0531). However, the 2d surface code requires the use of a complex state distillation procedure to achieve universal quantum computation. The colour code of (PRL 97:180501, 2006) is a related scheme partially solving the problem, providing a means to perform all Clifford group gates transversally. We review the colour code and its error correcting methodology, discussing one approximate technique based on graph matching. We derive an analytic lower bound to the threshold error rate of 6.25% under error-free syndrome extraction, while numerical simulations indicate it may be as high as 13.3%. Inclusion of faulty syndrome extraction circuits drops the threshold to approximately 0.1%.

Wang, D S; Hill, C D; Hollenberg, L C L

2009-01-01T23:59:59.000Z

410

Graphical algorithms and threshold error rates for the 2d colour code  

E-Print Network (OSTI)

Recent work on fault-tolerant quantum computation making use of topological error correction shows great potential, with the 2d surface code possessing a threshold error rate approaching 1% (NJoP 9:199, 2007), (arXiv:0905.0531). However, the 2d surface code requires the use of a complex state distillation procedure to achieve universal quantum computation. The colour code of (PRL 97:180501, 2006) is a related scheme partially solving the problem, providing a means to perform all Clifford group gates transversally. We review the colour code and its error correcting methodology, discussing one approximate technique based on graph matching. We derive an analytic lower bound to the threshold error rate of 6.25% under error-free syndrome extraction, while numerical simulations indicate it may be as high as 13.3%. Inclusion of faulty syndrome extraction circuits drops the threshold to approximately 0.1%.

D. S. Wang; A. G. Fowler; C. D. Hill; L. C. L. Hollenberg

2009-07-10T23:59:59.000Z

411

V-194: Citrix XenServer Memory Management Error Lets Local Administrative  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

4: Citrix XenServer Memory Management Error Lets Local 4: Citrix XenServer Memory Management Error Lets Local Administrative Users on the Guest Gain Access on the Host V-194: Citrix XenServer Memory Management Error Lets Local Administrative Users on the Guest Gain Access on the Host July 8, 2013 - 12:24am Addthis PROBLEM: Citrix XenServer Memory Management Error Lets Local Administrative Users on the Guest Gain Access on the Host PLATFORM: Citrix XenServer 5.0 - 6.2 ABSTRACT: A vulnerability was reported in Citrix XenServer. REFERENCE LINKS: CTX138134 SecurityTracker Alert ID: 1028740 CVE-2013-1432 IMPACT ASSESSMENT: Medium DISCUSSION: A local administrative user on a PV guest can exploit a memory management page reference counting error to gain access on the target host server. IMPACT: A local user on the guest operating system can obtain access on the target

412

U-064: Adobe Acrobat/Reader PRC Memory Corruption Error Lets Remote Users  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

4: Adobe Acrobat/Reader PRC Memory Corruption Error Lets Remote 4: Adobe Acrobat/Reader PRC Memory Corruption Error Lets Remote Users Execute Arbitrary Code U-064: Adobe Acrobat/Reader PRC Memory Corruption Error Lets Remote Users Execute Arbitrary Code December 19, 2011 - 9:15am Addthis PROBLEM: Adobe Acrobat/Reader PRC Memory Corruption Error Lets Remote Users Execute Arbitrary Code. PLATFORM: Adobe Acrobat Reader Version(s): 10.1.1 and prior versions ABSTRACT: A vulnerability was reported in Adobe Acrobat/Reader, this vulnerability is being actively exploited against Windows-based systems. reference LINKS: SecurityTracker Alert ID: 1026432 APSB11-30 CVE-2011-4369 JC3-CIRC Tech Bulletin U-054 APSA11-04 IMPACT ASSESSMENT: High Discussion: A remote user can create a specially crafted PDF file that, when loaded by the target user, will trigger a memory corruption error in the PRC

413

U-038: BIND 9 Resolver crashes after logging an error in query.c |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

8: BIND 9 Resolver crashes after logging an error in query.c 8: BIND 9 Resolver crashes after logging an error in query.c U-038: BIND 9 Resolver crashes after logging an error in query.c November 16, 2011 - 8:37am Addthis PROBLEM: BIND 9 Resolver crashes after logging an error in query.c. PLATFORM: Multiple version of BIND 9. Specific versions under investigation ABSTRACT: A remote server can cause the target connected client to crash. Organizations across the Internet are reporting crashes interrupting service on BIND 9 nameservers performing recursive queries. Affected servers crash after logging an error in query.c with the following message: "INSIST(! dns_rdataset_isassociated(sigrdataset))" Multiple versions are reported as being affected, including all currently supported release versions of ISC BIND 9. ISC is actively investigating the root cause and

414

T-545: RealPlayer Heap Corruption Error in 'vidplin.dll' Lets Remote Users  

NLE Websites -- All DOE Office Websites (Extended Search)

45: RealPlayer Heap Corruption Error in 'vidplin.dll' Lets 45: RealPlayer Heap Corruption Error in 'vidplin.dll' Lets Remote Users Execute Arbitrary Code T-545: RealPlayer Heap Corruption Error in 'vidplin.dll' Lets Remote Users Execute Arbitrary Code January 28, 2011 - 7:21am Addthis PROBLEM: RealPlayer Heap Corruption Error in 'vidplin.dll' Lets Remote Users Execute Arbitrary Code. PLATFORM: RealPlayer 14.0.1 and prior versions ABSTRACT: A vulnerability was reported in RealPlayer. A remote user can cause arbitrary code to be executed on the target user's system. reference LINKS: Security Tracker Alert CVE-2010-4393 IMPACT ASSESSMENT: Medium Discussion: A remote user can create a specially crafted AVI file that, when loaded by the target user, will trigger a heap corruption error in 'vidplin.dll' and execute arbitrary code on the target system. The code will run with the

415

Analysis of drilling fluid rheology and tool joint effect to reduce errors in hydraulics calculations  

E-Print Network (OSTI)

This study presents a simplified and accurate procedure for selecting the rheological model which best fits the rheological properties of a given non- Newtonian fluid and introduces five new approaches to correct for tool joint losses from expansion and contraction when hydraulics is calculated. The new approaches are enlargement and contraction (E&C), equivalent diameter (ED), two different (2IDs), enlargement and contraction plus equivalent diameter (E&C+ED), and enlargement and contraction plus two different IDs (E&C+2IDs). In addition to the Newtonian model, seven major non-Newtonian rheological models (Bingham plastic, Power law, API, Herschel-Bulkley, Unified, Robertson and Stiff, and Casson) provide alternatives for selecting the model that most accurately represents the shear-stress/shear-rate relationship for a given non- Newtonian fluid. The project assumes that the model which gives the lowest absolute average percent error (EAAP) between the measured and calculated shear stresses is the best one for a given non-Newtonian fluid. The results are of great importance in achieving correct results for pressure drop and hydraulics calculations and the results are that the API rheological model (RP 13D) provides, in general, the best prediction of rheological behavior for the mud samples considered (EAAP=1.51), followed by the Herschel-Bulkley, Robertson and Stiff, and Unified models. Results also show that corrections with E&C+2IDs and API hydraulics calculation give a good approximation to measured pump pressure with 9% of difference between measured and calculated data.

Viloria Ochoa, Marilyn

2006-08-01T23:59:59.000Z

416

Calibration, Response, and Hysteresis in Deep-Sea Dissolved Oxygen Measurements  

Science Conference Proceedings (OSTI)

Accurately measuring the dissolved oxygen concentration in the ocean has been the subject of considerable research. Traditionally, the calibration and correction of profiling oxygen measurements has centered on static, steady-state errors, ...

Bradley Edwards; David Murphy; Carol Janzen; Nordeen Larson

2010-05-01T23:59:59.000Z

417

Computer-assisted apparatus for measuring physical properties of meat during compression  

Science Conference Proceedings (OSTI)

Prototype apparatus was developed to measure the optical properties of meat during compression and the rheological properties of meat during thawing. Compression may be a source of error when meat quality is measured with an optical probe and the rheological ...

H. J. Swatland

1992-07-01T23:59:59.000Z

418

The Human Bathtub: Safety and Risk Predictions Including the Dynamic Probability of Operator Errors  

SciTech Connect

Reactor safety and risk are dominated by the potential and major contribution for human error in the design, operation, control, management, regulation and maintenance of the plant, and hence to all accidents. Given the possibility of accidents and errors, now we need to determine the outcome (error) probability, or the chance of failure. Conventionally, reliability engineering is associated with the failure rate of components, or systems, or mechanisms, not of human beings in and interacting with a technological system. The probability of failure requires a prior knowledge of the total number of outcomes, which for any predictive purposes we do not know or have. Analysis of failure rates due to human error and the rate of learning allow a new determination of the dynamic human error rate in technological systems, consistent with and derived from the available world data. The basis for the analysis is the 'learning hypothesis' that humans learn from experience, and consequently the accumulated experience defines the failure rate. A new 'best' equation has been derived for the human error, outcome or failure rate, which allows for calculation and prediction of the probability of human error. We also provide comparisons to the empirical Weibull parameter fitting used in and by conventional reliability engineering and probabilistic safety analysis methods. These new analyses show that arbitrary Weibull fitting parameters and typical empirical hazard function techniques cannot be used to predict the dynamics of human errors and outcomes in the presence of learning. Comparisons of these new insights show agreement with human error data from the world's commercial airlines, the two shuttle failures, and from nuclear plant operator actions and transient control behavior observed in transients in both plants and simulators. The results demonstrate that the human error probability (HEP) is dynamic, and that it may be predicted using the learning hypothesis and the minimum failure rate, and can be utilized for probabilistic risk analysis purposes. (authors)

Duffey, Romney B. [Atomic Energy of Canada, Ltd., 2251 Speakman Drive, Mississauga, ON, L5K 1B2 (Canada); Saull, John W. [International Federation of Airwothiness, 14 Railway Approach, East Grinstead, West Sussex, RH19 1BP (United Kingdom)

2006-07-01T23:59:59.000Z

419

Two-sided estimates of minimum-error distinguishability of mixed quantum states via generalized Holevo-Curlander bounds  

E-Print Network (OSTI)

We prove a concise factor-of-2 estimate for the failure rate of optimally distinguishing an arbitrary ensemble of mixed quantum states, generalizing work of Holevo [Theor. Probab. Appl. 23, 411 (1978)] and Curlander [Ph.D. Thesis, MIT, 1979]. A modification to the minimal principle of Cocha and Poor [Proceedings of the 6th International Conference on Quantum Communication, Measurement, and Computing (Rinton, Princeton, NJ, 2003)] is used to derive a suboptimal measurement which has an error rate within a factor of 2 of the optimal by construction. This measurement is quadratically weighted and has appeared as the first iterate of a sequence of measurements proposed by Jezek et al. [Phys. Rev. A 65, 060301 (2002)]. Unlike the so-called pretty good measurement, it coincides with Holevo's asymptotically optimal measurement in the case of nonequiprobable pure states. A quadratically weighted version of the measurement bound by Barnum and Knill [J. Math. Phys. 43, 2097 (2002)] is proven. Bounds on the distinguishability of syndromes in the sense of Schumacher and Westmoreland [Phys. Rev. A 56, 131 (1997)] appear as a corollary. An appendix relates our bounds to the trace-Jensen inequality.

Jon Tyson

2009-07-13T23:59:59.000Z

420

ARM - Measurements  

NLE Websites -- All DOE Office Websites (Extended Search)

Select below to highlight measurements in specified measurement categories. Aerosols The effect of aerosols is measured by instrument systems and lidars that provide data...

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

[an error occurred while processing this directive] site search  

E-Print Network (OSTI)

Applications E1.6 N. Shibata Junction Temperature Measurements in Deep-UV Light-Emitting Diodes E1.7 Y. Xi, J Emitting Diodes E1.8 Muhammad Jamil, James R. Grandusky, and Fatemeh Shahedipour-Sandvik Moth-Eye Light-EmittingGaN/GaN Light Emitting Diode With Multiquantum Barriers E3.27 Jen-Cheng Wang, Chung-Han Lin, Ray-Ming Lin, Tzer

Wetzel, Christian M.

422

A parametric study of the impact of various error contributions on the flux distribution of a solar dish concentrator.  

SciTech Connect

Dish concentrators can produce highly concentrated flux for the operation of an engine, a chemical process, or other energy converter. The high concentration allows a small aperture to control thermal losses, and permits high temperature processes at the focal point. A variety of optical errors can influence the flux pattern both at the aperture and at the absorber surface. Impacts of these errors can be lost energy (intercept losses), aperture compromise (increased size to accommodate flux), high peak fluxes (leading to part failure or life reduction), and improperly positioned flux also leading to component failure. Optical errors can include small scale facet errors ('waviness'), facet shape errors, alignment (facet pointing) errors, structural deflections, and tracking errors. The errors may be random in nature, or may be systematic. The various sources of errors are often combined in a 'root-mean-squared' process to present a single number as an 'error budget'. However, this approach ignores the fact that various errors can influence the performance in different ways, and can mislead the designer, leading to component damage in a system or poor system performance. In this paper, we model a hypothetical radial gore dish system using Sandia's CIRCE2 optical code. We evaluate the peak flux and incident power through the aperture and onto various parts of the receiver cavity. We explore the impact of different error sources on the character of the flux pattern, and demonstrate the limitations of lumping all of the errors into a single error budget.

Yellowhair, Julius; Iverson, Brian D.; Andraka, Charles E.

2010-04-01T23:59:59.000Z

423

Measuring Devices  

Science Conference Proceedings (OSTI)

... Compressed Natural Gas Retail Motor-Fuel Dispensers; Hydrogen Measuring Devices; Liquefied Petroleum Gas Liquid-Measuring Devices; Loading ...

2010-10-05T23:59:59.000Z

424

Modern Palliative Radiation Treatment: Do Complexity and Workload Contribute to Medical Errors?  

SciTech Connect

Purpose: To examine whether treatment workload and complexity associated with palliative radiation therapy contribute to medical errors. Methods and Materials: In the setting of a large academic health sciences center, patient scheduling and record and verification systems were used to identify patients starting radiation therapy. All records of radiation treatment courses delivered during a 3-month period were retrieved and divided into radical and palliative intent. 'Same day consultation, planning and treatment' was used as a proxy for workload and 'previous treatment' and 'multiple sites' as surrogates for complexity. In addition, all planning and treatment discrepancies (errors and 'near-misses') recorded during the same time frame were reviewed and analyzed. Results: There were 365 new patients treated with 485 courses of palliative radiation therapy. Of those patients, 128 (35%) were same-day consultation, simulation, and treatment patients; 166 (45%) patients had previous treatment; and 94 (26%) patients had treatment to multiple sites. Four near-misses and 4 errors occurred during the audit period, giving an error per course rate of 0.82%. In comparison, there were 10 near-misses and 5 errors associated with 1100 courses of radical treatment during the audit period. This translated into an error rate of 0.45% per course. An association was found between workload and complexity and increased palliative therapy error rates. Conclusions: Increased complexity and workload may have an impact on palliative radiation treatment discrepancies. This information may help guide the necessary recommendations for process improvement for patients who require palliative radiation therapy.

D'Souza, Neil, E-mail: neil.dsouza@sunnybrook.ca [Department of Radiation Oncology, University of Toronto, Toronto, Ontario (Canada) [Department of Radiation Oncology, University of Toronto, Toronto, Ontario (Canada); Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario (Canada); Holden, Lori [Department of Radiation Oncology, University of Toronto, Toronto, Ontario (Canada) [Department of Radiation Oncology, University of Toronto, Toronto, Ontario (Canada); Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario (Canada); Robson, Sheila [Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario (Canada)] [Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario (Canada); Mah, Kathy; Di Prospero, Lisa; Wong, C. Shun; Chow, Edward; Spayne, Jacqueline [Department of Radiation Oncology, University of Toronto, Toronto, Ontario (Canada) [Department of Radiation Oncology, University of Toronto, Toronto, Ontario (Canada); Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario (Canada)

2012-09-01T23:59:59.000Z

425

Quantum state tomography with fully symmetric measurements and product measurements  

SciTech Connect

We introduce random-matrix theory to study the tomographic efficiency of a wide class of measurements constructed out of weighted 2-designs, including symmetric informationally complete (SIC) probability operator measurements (POMs). In particular, we derive analytic formulas for the mean Hilbert-Schmidt distance and the mean trace distance between the estimator and the true state, which clearly show the difference between the scaling behaviors of the two error measures with the dimension of the Hilbert space. We then prove that the product SIC POMs, the multipartite analog of the SIC POMs, are optimal among all product measurements in the same sense as the SIC POMs are optimal among all joint measurements. We further show that, for bipartite systems, there is only a marginal efficiency advantage of the joint SIC POMs over the product SIC POMs. In marked contrast, for multipartite systems, the efficiency advantage of the joint SIC POMs increases exponentially with the number of parties.

Zhu Huangjun [Centre for Quantum Technologies, National University of Singapore, Singapore 117543 (Singapore); NUS Graduate School for Integrative Sciences and Engineering, Singapore 117597 (Singapore); Englert, Berthold-Georg [Centre for Quantum Technologies, National University of Singapore, Singapore 117543 (Singapore); Department of Physics, National University of Singapore, Singapore 117542 (Singapore)

2011-08-15T23:59:59.000Z

426

Summary of QM02 Measurements  

SciTech Connect

This note summarizes both the beam-based and various laboratory measurements of quadrupole magnets, units 387 and 428, used for QM02 in the LCLS Injector. These were undertaken because of a consistent discrepancy between accelerator model predictions and beam observations which seemed to indicate a weak QM02. A report 'QM02 Strength Measurement', by Welch and Wu, describes the discrepancy and beam-based measurements on unit 387. Subsequently, unit 387 was replaced by unit 428, refinements were made to analysis of the beam-based measurements were made, and additional magnetic measurements were made on unit 387 in the lab. These new results are summarized in this note. The principle results are: (1) Laboratory measurements of integrated gradient for the same magnet, or for different magnets of the same type, are all within 1% of each other at gradients of interest. These cases cover three independent types of measurements, disassembly/reassembly of the units, and extended periods of time between measurements. (2) Standardization, or lack thereof, can cause integrated gradient errors of approximately 0.2 kG, which can amount to a few percent of the strength of the magnet depending on the setting. (3) Model-independent beam-based measurements indicate the magnets are actually weaker than expected by about 2 percent, but these measurements are subject to the uncertainty of the BPMS1 location. (4) The standardization cycle is effective. (5) The stainless steel BPM vacuum chamber inside the magnets has no significant effect on the beam. The discrepancy between the accelerator model predictions and the actual orbit response is not resolved, but the evidence points away from magnetic strength errors as the source. Differences between the model locations and effective locations of BPM's is a possible culprit. This idea is explored in Section 2. Table 1 summarizes the measurement activities that were performed on the units. The dates listed correspond to the date when the relevent series of runs was completed.

Fisher, Andrew

2010-12-03T23:59:59.000Z

427

Effect of various errors on the Spin Tune and Stable Spin Axis  

DOE Green Energy (OSTI)

Even though RHIC has two full Siberian snakes in each ring, there are various perturbations to the ideal case including orbit errors at the snakes, experiment solenoids, injection bumps, and interlaced horizontal-vertical bumps at the hydrogen jet polarimeter. These errors can cause depolarization by shifting the spin tune and tilting the stable spin direction away from vertical. Tilting of the stable spin axis can enhance horizontal depolarizing resonances. This paper presents preliminary results for some of these error scenarios, as well as their impact on the stable spin directions at STAR and PHENIX.

MacKay,W.W.

2008-10-06T23:59:59.000Z

428

Effect of Various Errors on the Spin Tune and Stable Spin Axis  

DOE Green Energy (OSTI)

Even though RHIC has two full Siberian snakes in each ring, there are various perturbations to the ideal case including orbit errors at the snakes, experiment solenoids, injection bumps, and interlaced horizontal-vertical bumps at the hydrogen jet polarimeter. These errors can cause depolarization by shifting the spin tune and tilting the stable spin direction away from vertical. Tilting of the stable spin axis can enhance horizontal depolarizing resonances. This paper presents preliminary results for some of these error scenarios, as well as their impact on the stable spin directions at STAR and PHENIX.

MacKay,W.W.

2009-01-01T23:59:59.000Z

429

Error Threshold for Color Codes and Random 3-Body Ising Models  

E-Print Network (OSTI)

We study the error threshold of color codes, a class of topological quantum codes that allow a direct implementation of quantum Clifford gates suitable for entanglement distillation, teleportation and fault-tolerant quantum computation. We map the error-correction process onto a statistical mechanical random 3-body Ising model and study its phase diagram via Monte Carlo simulations. The obtained error threshold of p_c = 0.109(2) is very close to that of Kitaev's toric code, showing that enhanced computational capabilities does not necessarily imply lower resistance to noise.

Helmut G. Katzgraber; H. Bombin; M. A. Martin-Delgado

2009-02-27T23:59:59.000Z

430

Error Threshold for Color Codes and Random 3-Body Ising Models  

E-Print Network (OSTI)

We study the error threshold of color codes, a class of topological quantum codes that allow a direct implementation of quantum Clifford gates suitable for entanglement distillation, teleportation and fault-tolerant quantum computation. We map the error-correction process onto a statistical mechanical random 3-body Ising model and study its phase diagram via Monte Carlo simulations. The obtained error threshold of p_c = 0.109(2) is very close to that of Kitaev's toric code, showing that enhanced computational capabilities does not necessarily imply lower resistance to noise.

Katzgraber, Helmut G; Martín-Delgado, M A

2009-01-01T23:59:59.000Z

431

U-037: Linux Kernel NFSv4 ACL Attribute Processing Error Lets Remote Users  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

7: Linux Kernel NFSv4 ACL Attribute Processing Error Lets 7: Linux Kernel NFSv4 ACL Attribute Processing Error Lets Remote Users Execute Arbitrary Code U-037: Linux Kernel NFSv4 ACL Attribute Processing Error Lets Remote Users Execute Arbitrary Code November 16, 2011 - 7:43am Addthis PROBLEM: Linux Kernel NFSv4 ACL Attribute Processing Error Lets Remote Users Execute Arbitrary Code. PLATFORM: Kernel version 2.6.x ABSTRACT: A remote server can cause the target connected client to crash. reference LINKS: The Linux Kernel Archives CVE-2011-4131 SecurityTracker Alert ID: 1026324 Linux Kernel [PATCH 1/1] NFSv4 IMPACT ASSESSMENT: Medium Discussion: A vulnerability was reported in the Linux Kernel. A remote user can cause denial of service conditions. Impact: A remote server can return specially crafted data to the connected target

432

V-009: Adobe Shockwave Player Buffer Overflows and Array Error Lets Remote  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

09: Adobe Shockwave Player Buffer Overflows and Array Error Lets 09: Adobe Shockwave Player Buffer Overflows and Array Error Lets Remote Users Execute Arbitrary Code V-009: Adobe Shockwave Player Buffer Overflows and Array Error Lets Remote Users Execute Arbitrary Code October 24, 2012 - 6:00am Addthis PROBLEM: Adobe Shockwave Player Buffer Overflows and Array Error Lets Remote Users Execute Arbitrary Code PLATFORM: Adobe Shockwave Player 11.6.7.637 and earlier versions for Windows and Macintosh ABSTRACT: Several vulnerabilities were reported in Adobe Shockwave. REFERENCE LINKS: Adobe Security bulletin SecurityTracker Alert ID: 1027692 CVE-2012-4172 CVE-2012-4173 CVE-2012-4174 CVE-2012-4175 CVE-2012-4176 CVE-2012-5273 IMPACT ASSESSMENT: High DISCUSSION: A remote user can create specially crafted content that, when loaded by the target user, will trigger a buffer overflow and execute arbitrary code on

433

Can Wavelets Improve the Representation of Forecast Error Covariances in Variational Data Assimilation?  

Science Conference Proceedings (OSTI)

Two wavelet-based control variable transform schemes are described and are used to model some important features of forecast error statistics for use in variational data assimilation. The first is a conventional wavelet scheme and the other is an ...

Ross N. Bannister

2007-02-01T23:59:59.000Z

434

An Estimate of the Sampling Error Variance of the Gridded GHCN Monthly Surface Air Temperature Data  

Science Conference Proceedings (OSTI)

The sampling error variances of the 5° × 5° Global Historical Climatological Network (GHCN) monthly surface air temperature data are estimated from January 1851 to December 2001. For each GHCN grid box and for each month in the above time ...

S. S. P. Shen; H. Yin; T. M. Smith

2007-05-01T23:59:59.000Z

435

Localization and Sampling Error Correction in Ensemble Kalman Filter Data Assimilation  

Science Conference Proceedings (OSTI)

Ensemble Kalman filters use the sample covariance of an observation and a model state variable to update a prior estimate of the state variable. The sample covariance can be suboptimal as a result of small ensemble size, model error, model ...

Jeffrey L. Anderson

2012-07-01T23:59:59.000Z

436

The Impact of Analysis Error on Medium-Range Weather Forecasts  

Science Conference Proceedings (OSTI)

All meteorological analyzed fields contain errors, the magnitude of which ultimately determines the point at which a given forecast will fail. Here, the authors explore the extent to which analysis difference fields capture certain aspects of the ...

Kyle L. Swanson; Paul J. Roebber

2008-09-01T23:59:59.000Z

437

Remarks on Northern Hemisphere Forecast Error Sensitivity from 1996 to 2000  

Science Conference Proceedings (OSTI)

The sensitivity of 2-day Northern Hemisphere extratropical forecast errors to changes in initial conditions, computed daily over a 4-yr period, is documented. The sensitivity is computed using the (dry) adjoint of the Navy Operational Global ...

C. A. Reynolds; R. Gelaro

2001-08-01T23:59:59.000Z

438

Design as you see FIT: system-level soft error analysis of sequential circuits  

Science Conference Proceedings (OSTI)

Soft errors in combinational and sequential elements of digital circuits are an increasing concern as a result of technology scaling. Several techniques for gate and latch hardening have been proposed to synthesize circuits that are tolerant to soft ...

Daniel Holcomb; Wenchao Li; Sanjit A. Seshia

2009-04-01T23:59:59.000Z

439

Stratospheric Wind Errors, Initial States and Forecast Skill in the GLAS General Circulation Model  

Science Conference Proceedings (OSTI)

Relations between stratospheric wind errors, initial states and 500 mb skill are investigated using the GLAS general circulation model initialized with FGGE data. Erroneous stratospheric winds are seen in all current general circulation models, ...

J. Tenenbaum

1983-09-01T23:59:59.000Z

440

Soil Moisture Initialization Error and Subgrid Variability of Precipitation in Seasonal Streamflow Forecasting  

Science Conference Proceedings (OSTI)

Offline simulations over the conterminous United States (CONUS) with a land surface model are used to address two issues relevant to the forecasting of large-scale seasonal streamflow: (i) the extent to which errors in soil moisture initialization ...

Randal D. Koster; Gregory K. Walker; Sarith P. P. Mahanama; Rolf H. Reichle

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

U-063: RSA SecurID Software Token for Windows DLL Loading Error Lets Remote  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

3: RSA SecurID Software Token for Windows DLL Loading Error 3: RSA SecurID Software Token for Windows DLL Loading Error Lets Remote Users Execute Arbitrary Code U-063: RSA SecurID Software Token for Windows DLL Loading Error Lets Remote Users Execute Arbitrary Code December 16, 2011 - 8:00am Addthis PROBLEM: RSA SecurID Software Token for Windows DLL Loading Error Lets Remote Users Execute Arbitrary Code. PLATFORM: RSA SecurID Software Token 4.1 for Microsoft Windows ABSTRACT: A remote user can cause the target application to execute arbitrary code on the target user's system. reference LINKS: SecurityTracker Alert ID: 1026426 ESA-2011-039 Secunia Advisory: SA45665 Securityfocus Advisory CVE-2011-4141 RSA Online Fraud Resource Center IMPACT ASSESSMENT: High Discussion: A vulnerability was reported in RSA SecurID Software Token. A remote user

442

U-063: RSA SecurID Software Token for Windows DLL Loading Error Lets Remote  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

63: RSA SecurID Software Token for Windows DLL Loading Error 63: RSA SecurID Software Token for Windows DLL Loading Error Lets Remote Users Execute Arbitrary Code U-063: RSA SecurID Software Token for Windows DLL Loading Error Lets Remote Users Execute Arbitrary Code December 16, 2011 - 8:00am Addthis PROBLEM: RSA SecurID Software Token for Windows DLL Loading Error Lets Remote Users Execute Arbitrary Code. PLATFORM: RSA SecurID Software Token 4.1 for Microsoft Windows ABSTRACT: A remote user can cause the target application to execute arbitrary code on the target user's system. reference LINKS: SecurityTracker Alert ID: 1026426 ESA-2011-039 Secunia Advisory: SA45665 Securityfocus Advisory CVE-2011-4141 RSA Online Fraud Resource Center IMPACT ASSESSMENT: High Discussion: A vulnerability was reported in RSA SecurID Software Token. A remote user

443

T-609: Adobe Acrobat/Reader Memory Corruption Error in CoolType Library  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

T-609: Adobe Acrobat/Reader Memory Corruption Error in CoolType T-609: Adobe Acrobat/Reader Memory Corruption Error in CoolType Library Lets Remote Users Execute Arbitrary Code T-609: Adobe Acrobat/Reader Memory Corruption Error in CoolType Library Lets Remote Users Execute Arbitrary Code April 25, 2011 - 7:00am Addthis PROBLEM: A vulnerability was reported in Adobe Acrobat and Adobe Reader. A remote user can cause arbitrary code to be executed on the target user's system. PLATFORM: Adobe Reader and Acrobat X (10.0.2) and earlier 10.x and 9.x versions for Windows and Macintosh operating systems ABSTRACT: A remote user can create a specially crafted PDF file that, when loaded by the target user, will trigger a memory corruption error in the CoolType library and execute arbitrary code on the target system. The code will run

444

U-041: Google Chrome Out-of-Bounds Write Error Lets Remote Users Execute  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1: Google Chrome Out-of-Bounds Write Error Lets Remote Users 1: Google Chrome Out-of-Bounds Write Error Lets Remote Users Execute Arbitrary Code U-041: Google Chrome Out-of-Bounds Write Error Lets Remote Users Execute Arbitrary Code November 18, 2011 - 9:00am Addthis PROBLEM: Google Chrome Out-of-Bounds Write Error Lets Remote Users Execute Arbitrary Code. PLATFORM: Version(s) prior to 15.0.874.121 ABSTRACT: A remote user can create HTML that, when loaded by the target user, will execute arbitrary code on the target user's system. reference LINKS: Stable Channel Update CVE-2011-3900 SecurityTracker Alert ID: 1026338 IMPACT ASSESSMENT: High Discussion: A vulnerability was reported in Google Chrome. A remote user can cause arbitrary code to be executed on the target user's system. A remote user can create specially crafted HTML that, when loaded by the target user,

445

Estimation of Three-Dimensional Error Covariances. Part II: Analysis of Wind Innovation Vectors  

Science Conference Proceedings (OSTI)

The method of statistical analysis of wind innovation (observation minus forecast) vectors is refined upon the work of Hollingsworth and Lönnberg (HL). The new refinements include (i) improved spectral representations of wind forecast error ...

Qin Xu; Li Wei

2001-12-01T23:59:59.000Z

446

Reduction of Tropical Cyclone Position Errors Using an Optimal Combination of Independent Forecasts  

Science Conference Proceedings (OSTI)

It is shown that an optimal linear combination of independent forecasts of tropical cyclone tracks significantly reduces the mean forecast-position errors. In this study the independent forecasts are provided by a statistical scheme (CLIPER) and ...

Lance M. Leslie; Klaus Fraedrich

1990-03-01T23:59:59.000Z

447

Errors of Five-Day Mean Surface Wind and Temperature Conditions due to Inadequate Sampling  

Science Conference Proceedings (OSTI)

Surface meteorological reports of wind components, wind speed, air temperature, and sea surface temperature from buoys located in equatorial and midlatitude regions are used in a simulation of random sampling to determine errors of the calculated ...

David M. Legler

1991-10-01T23:59:59.000Z

448

Interchannel Error Correlation Associated with AIRS Radiance Observations: Inference and Impact in Data Assimilation  

Science Conference Proceedings (OSTI)

The interchannel observation error correlation (IOEC) associated with radiance observations is currently assumed to be zero in meteorological data assimilation systems. This assumption may lead to suboptimal analyses. Here, the IOEC is inferred ...

Louis Garand; Sylvain Heilliette; Mark Buehner

2007-06-01T23:59:59.000Z

449

Systematic Energy Errors and the Tendency toward Canonical Equilibrium in Atmospheric Circulation Models  

Science Conference Proceedings (OSTI)

Systematic kinetic energy errors are examined in barotropic and multilevel general circulation models. The dependence of energy spectra on resolution and dissipation and, in addition for the barotropic model, on topography and the beta effect, is ...

Jorgen S. Frederiksen; Martin R. Dix; Steven M. Kepert

1996-03-01T23:59:59.000Z

450

Ensemble Data Assimilation to Characterize Surface-Layer Errors in Numerical Weather Prediction Models  

Science Conference Proceedings (OSTI)

Experiments with the single-column implementation of the Weather Research and Forecasting Model provide a basis for deducing land–atmosphere coupling errors in the model. Coupling occurs both through heat and moisture fluxes through the land–...

J. P. Hacker; W. M. Angevine

2013-06-01T23:59:59.000Z

451

Error Estimates for an Ocean General Circulation Model from Altimeter and Acoustic Tomography Data  

Science Conference Proceedings (OSTI)

An offline approach is proposed for the estimation of model and data error covariance matrices whereby covariance matrices of model data residuals are “matched” to their theoretical expectations using familiar least-squares methods. This ...

Dimitris Menemenlis; Michael Chechelnitsky

2000-03-01T23:59:59.000Z

452

Flight-Level Thermodynamic Instrument Wetting Errors in Hurricanes. Part I: Observations  

Science Conference Proceedings (OSTI)

Flight-level thermodynamic errors caused by the wetting of temperature and moisture sensors immersed within the airstream are studied using data from 666 radial legs collected in 31 hurricanes at pressure levels ranging from 850 to 500 mb. ...

Matthew D. Eastin; Peter G. Black; William M. Gray

2002-04-01T23:59:59.000Z

453

Systematic Model Error: The Impact of Increased Horizontal Resolution versus Improved Stochastic and Deterministic Parameterizations  

Science Conference Proceedings (OSTI)

Long-standing systematic model errors in both tropics and extratropics of the ECMWF model run at a horizontal resolution typical for climate models are investigated. Based on the hypothesis that the misrepresentation of unresolved scales ...

J. Berner; T. Jung; T. N. Palmer

2012-07-01T23:59:59.000Z

454

The Effect of Horizontal Resolution on Systematic Errors of the GLA Forecast Model  

Science Conference Proceedings (OSTI)

Systematic prediction errors of the Goddard Laboratory for Atmospheres (GLA) forecast system are reduced when the higher-resolution (2° × 2.5°) model version is used. Based on a budget analysis of the 200-mb eddy streamfunction, the improvement ...

Tsing-Chang Chen; Jau-Ming Chen; James Pfaendtner

1990-06-01T23:59:59.000Z

455

Numerical Approximations Can Create Chaos-related Errors in Blocking Forecasts  

Science Conference Proceedings (OSTI)

The chaotic structure of two-dimensional atmospheric flow is illustrated. It is shown that certain errors in numerical approximations can Prevent the correct prediction of chaotic processes. This is the case when the numerical approximations do ...

Juhani Rinne; Heikki Järvinen

1992-05-01T23:59:59.000Z

456

Stability of error bounds for semi-infinite convex constraint systems  

E-Print Network (OSTI)

where T is a compact, possibly infinite, Hausdorff space, ft : Rn ? R, t ? T, are .... is the error bound modulus [9]) (also known as conditioning rate [22]) of f at ¯x.

457

On the evaluation of human error probabilities for post-initiating events  

E-Print Network (OSTI)

Quantification of human error probabilities (HEPs) for the purpose of human reliability assessment (HRA) is very complex. Because of this complexity, the state of the art includes a variety of HRA models, each with its own ...

Presley, Mary R

2006-01-01T23:59:59.000Z

458

FERRARI: A Flexible Software-Based Fault and Error Injection System  

Science Conference Proceedings (OSTI)

Abstract¿A major step toward the development offault-tolerant computer systems is the validation of the dependability properties of these systems. Fault/error injection has been recognized as a powerful approach to validate the fault tolerance mechanisms ...

Ghani A. Kanawati; Nasser A. Kanawati; Jacob A. Abraham

1995-02-01T23:59:59.000Z

459

Error Characteristics of Two Grid Refinement Approaches in Aquaplanet Simulations: MPAS-A and WRF  

Science Conference Proceedings (OSTI)

This study compares the error characteristics associated with two grid refinement approaches including global variable resolution and nesting for high-resolution regional climate modeling. The global variable-resolution model, Model for Prediction ...

Samson Hagos; Ruby Leung; Sara A. Rauscher; Todd Ringler

2013-09-01T23:59:59.000Z

460

Multivariate Error Covariance Estimates by Monte Carlo Simulation for Assimilation Studies in the Pacific Ocean  

Science Conference Proceedings (OSTI)

One of the most difficult aspects of ocean-state estimation is the prescription of the model forecast error covariances. The paucity of ocean observations limits our ability to estimate the covariance structures from model–observation ...

Anna Borovikov; Michele M. Rienecker; Christian L. Keppenne; Gregory C. Johnson

2005-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

A Hybrid Background Error Covariance Model for Assimilating Glider Data into a Coastal Ocean Model  

Science Conference Proceedings (OSTI)

A hybrid background error covariance (BEC) model for three-dimensional variational data assimilation of glider data into the Navy Coastal Ocean Model (NCOM) is introduced. Similar to existing atmospheric hybrid BEC models, the proposed model ...

Max Yaremchuk; Dmitri Nechaev; Chudong Pan

2011-06-01T23:59:59.000Z

462

The Effect of Storm Life Cycle on Satellite Rainfall Estimation Error  

Science Conference Proceedings (OSTI)

The study uses storm tracking information to evaluate error statistics of satellite rain estimation at different maturity stages of storm life cycles. Two satellite rain retrieval products are used for this purpose: (i) NASA’s Multisatellite ...

Alemu Tadesse; Emmanouil N. Anagnostou

2009-04-01T23:59:59.000Z

463

A Comparison of Errors in objectively Analyzed Fields for Uniform and Nonuniform Station Distributions  

Science Conference Proceedings (OSTI)

An error analysis of the Purdue Regional Objective Analysis of the Mesoscale (PROAM) scheme is described. PROAM is an interactive, multiple iteration objective analysis package for surface meteorological data. It utilizes a Gaussian weighting ...

David R. Smith; Michelle E. Pumphry; John T. Snow

1986-03-01T23:59:59.000Z

464

A Correction for the Errors in Ship Reports of Light Winds  

Science Conference Proceedings (OSTI)

The errors in ship wind reports of light winds tend to significantly bias their mean. This occurs because wind speed is a scalar quantity that is constrained to zero or positive values. Therefore, observations tend to overestimate the light winds ...

Barry B. Hinton; Donald P. Wylie

1985-09-01T23:59:59.000Z

465

A Wavelet Approach to Representing Background Error Covariances in a Limited-Area Model  

Science Conference Proceedings (OSTI)

The use of orthogonal wavelets for the representation of background error covariances over a limited area is studied. Each wavelet function contains both information on position and information on scale: using a diagonal correlation matrix in ...

Alex Deckmyn; Loïk Berre

2005-05-01T23:59:59.000Z

466

An Examination of Background Error Correlations between Mass and Rotational Wind over Precipitation Regions  

Science Conference Proceedings (OSTI)

The differences in the balance characteristics between dry and precipitation areas in estimated short-term forecast error fields are investigated. The motivation is to see if dry and precipitation areas need to be treated differently in ...

Jean-François Caron; Luc Fillion

2010-02-01T23:59:59.000Z

467

Sensitivity Analysis of a 3D Convective Storm: Implications for Variational Data Assimilation and Forecast Error  

Science Conference Proceedings (OSTI)

In this study a nonhydrostatic 3D cloud model, along with an automatic differentiation tool, is used to investigate the sensitivity of a supercell storm to prescribed errors (perturbations) in the water vapor field. The evolution of individual ...

Seon Ki Park; Kelvin K. Droegemeier

2000-01-01T23:59:59.000Z

468

Implications of Ensemble Quantitative Precipitation Forecast Errors on Distributed Streamflow Forecasting  

Science Conference Proceedings (OSTI)

Evaluating the propagation of errors associated with ensemble quantitative precipitation forecasts (QPFs) into the ensemble streamflow response is important to reduce uncertainty in operational flow forecasting. In this paper, a multifractal ...

Giuseppe Mascaro; Enrique R. Vivoni; Roberto Deidda

2010-02-01T23:59:59.000Z

469

Spatial Structure, Forecast Errors, and Predictability of the South Asian Monsoon in CFS Monthly Retrospective Forecasts  

Science Conference Proceedings (OSTI)

The spatial structure of the boreal summer South Asian monsoon in the ensemble mean of monthly retrospective forecasts by the Climate Forecast System of the National Centers for Environmental Prediction is examined. The forecast errors and ...

Hae-Kyung Lee Drbohlav; V. Krishnamurthy

2010-09-01T23:59:59.000Z

470

A Study of the Error Covariance Matrix of Radar Rainfall Estimates in Stratiform Rain  

Science Conference Proceedings (OSTI)

The contribution of various physical sources of uncertainty affecting radar rainfall estimates at the ground is quantified toward deriving and understanding the error covariance matrix of these estimates. The focus here is on stratiform ...

Marc Berenguer; Isztar Zawadzki

2008-12-01T23:59:59.000Z

471

Investigating Error Metrics for Satellite Rainfall Data at Hydrologically Relevant Scales  

Science Conference Proceedings (OSTI)

This paper addresses the following open question: What set of error metrics for satellite rainfall data can advance the hydrologic application of new-generation, high-resolution rainfall products over land? The authors’ primary aim is to initiate ...

Faisal Hossain; George J. Huffman

2008-06-01T23:59:59.000Z

472

Flight-Level Thermodynamic Instrument Wetting Errors in Hurricanes. Part II: Implications  

Science Conference Proceedings (OSTI)

The implications of flight-level instrument wetting error removal upon the mean thermodynamic structure across the eyewall, buoyancy of rainband vertical motions, and vertical energy fluxes near the top of the inflow layer are studied. ...

Matthew D. Eastin; Peter G. Black; William M. Gray

2002-04-01T23:59:59.000Z

473

Estimating Climatological Bias Errors for the Global Precipitation Climatology Project (GPCP)  

Science Conference Proceedings (OSTI)

A procedure is described to estimate bias errors for mean precipitation by using multiple estimates from different algorithms, satellite sources, and merged products. The Global Precipitation Climatology Project (GPCP) monthly product is used as a ...

Robert F. Adler; Guojun Gu; George J. Huffman

2012-01-01T23:59:59.000Z

474

Investigating the Applicability of Error Correction Ensembles of Satellite Rainfall Products in River Flow Simulations  

Science Conference Proceedings (OSTI)

This study uses a stochastic ensemble-based representation of satellite rainfall error to predict the propagation in flood simulation of three quasi-global-scale satellite rainfall products across a range of basin scales. The study is conducted on ...

Viviana Maggioni; Humberto J. Vergara; Emmanouil N. Anagnostou; Jonathan J. Gourley; Yang Hong; Dimitrios Stampoulis

2013-08-01T23:59:59.000Z

475

Determination of Forecast Errors Arising from Different Components of Model Physics and Dynamics  

Science Conference Proceedings (OSTI)

This paper addresses a procedure to extract error estimates for the physical and dynamical components of a forecast model. This is a two-step process in which contributions to the forecast tendencies from individual terms of the model equations ...

T. N. Krishnamurti; J. Sanjay; A. K. Mitra; T. S. V. Vijaya Kumar

2004-11-01T23:59:59.000Z

476

An Examination of Model Track Forecast Errors for Hurricane Ike (2008) in the Gulf of Mexico  

Science Conference Proceedings (OSTI)

Sources of dynamical model track error for Hurricane Ike (2008) in the Gulf of Mexico are examined. Deterministic and ensemble model output are compared against National Centers for Environmental Prediction (NCEP) Global Forecast System (GFS) ...

Michael J. Brennan; Sharanya J. Majumdar

2011-12-01T23:59:59.000Z

477

Field Significance Revisited: Spatial Bias Errors in Forecasts as Applied to the Eta Model  

Science Conference Proceedings (OSTI)

The spatial structure of bias errors in numerical model output is valuable to both model developers and operational forecasters, especially if the field containing the structure itself has statistical significance in the face of naturally ...

Kimberly L. Elmore; Michael E. Baldwin; David M. Schultz

2006-02-01T23:59:59.000Z

478

Error analysis of motion transmission mechanisms : design of a parabolic solar trough  

E-Print Network (OSTI)

This thesis presents the error analysis pertaining to the design of an innovative solar trough for use in solar thermal energy generation fields. The research was a collaborative effort between Stacy Figueredo from Prof. ...

Koniski, Cyril (Cyril A.)

2009-01-01T23:59:59.000Z

479

Measurement uncertainty analysis techniques applied to PV performance measurements  

DOE Green Energy (OSTI)

The purpose of this presentation is to provide a brief introduction to measurement uncertainty analysis, outline how it is done, and illustrate uncertainty analysis with examples drawn from the PV field, with particular emphasis toward its use in PV performance measurements. The uncertainty information we know and state concerning a PV performance measurement or a module test result determines, to a significant extent, the value and quality of that result. What is measurement uncertainty analysis It is an outgrowth of what has commonly been called error analysis. But uncertainty analysis, a more recent development, gives greater insight into measurement processes and tests, experiments, or calibration results. Uncertainty analysis gives us an estimate of the I interval about a measured value or an experiment's final result within which we believe the true value of that quantity will lie. Why should we take the time to perform an uncertainty analysis A rigorous measurement uncertainty analysis: Increases the credibility and value of research results; allows comparisons of results from different labs; helps improve experiment design and identifies where changes are needed to achieve stated objectives (through use of the pre-test analysis); plays a significant role in validating measurements and experimental results, and in demonstrating (through the post-test analysis) that valid data have been acquired; reduces the risk of making erroneous decisions; demonstrates quality assurance and quality control measures have been accomplished; define Valid Data as data having known and documented paths of: Origin, including theory; measurements; traceability to measurement standards; computations; uncertainty analysis of results.

Wells, C.

1992-10-01T23:59:59.000Z

480

On the Influence of Random Wind Stress Errors on the Four-Dimensional, Midlatitude Ocean Inverse Problem  

Science Conference Proceedings (OSTI)

The effects of the parameterized wind stress error covariance function on the a priori error covariance of an ocean general circulation model (OGCM) are examined. These effects are diagnosed by computing the projection of the a priori model state ...

Tsuyoshi Wakamatsu; Michael G. G. Foreman; Patrick F. Cummins; Josef Y. Cherniawsky

2009-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "nonsampling errors measures" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

GPCE-AX: An Anisotropic Extension to the Goerss Predicted Consensus Error in Tropical Cyclone Track Forecasts  

Science Conference Proceedings (OSTI)

A method to predict an anisotropic expected forecast error distribution for consensus forecasts of tropical cyclone (TC) tracks is presented. The method builds upon the Goerss predicted consensus error (GPCE), which predicts the isotropic radius ...

James A. Hansen; James S. Goerss; Charles Sampson

2011-06-01T23:59:59.000Z

482

RSE Table 5.4 Relative Standard Errors for Table 5.4  

U.S. Energy Information Administration (EIA) Indexed Site

4 Relative Standard Errors for Table 5.4;" 4 Relative Standard Errors for Table 5.4;" " Unit: Percents." " "," ",," ","Distillate"," "," " " "," ","Net Demand",,"Fuel Oil",,,"Coal" "NAICS"," ","for ","Residual","and","Natural ","LPG and","(excluding Coal" "Code(a)","End Use","Electricity(b)","Fuel Oil","Diesel Fuel(c)","Gas(d)","NGL(e)","Coke and Breeze)" ,,"Total United States" " 311 - 339","ALL MANUFACTURING INDUSTRIES" ,"TOTAL FUEL CONSUMPTION",2,3,6,2,3,9

483

RSE Table 7.9 Relative Standard Errors for Table 7.9  

U.S. Energy Information Administration (EIA) Indexed Site

9 Relative Standard Errors for Table 7.9;" 9 Relative Standard Errors for Table 7.9;" " Unit: Percents." " "," "," ",," "," "," "," "," "," "," ",," " " "," " "NAICS"," "," ",,"Residual","Distillate","Natural ","LPG and",,"Coke"," " "Code(a)","Subsector and Industry","Total","Electricity","Fuel Oil","Fuel Oil(b)","Gas(c)","NGL(d)","Coal","and Breeze","Other(e)" ,,"Total United States" 311,"Food",4,4,24,21,5,23,7,0,20

484

RSE Table 3.2 Relative Standard Errors for Table 3.2  

U.S. Energy Information Administration (EIA) Indexed Site

2 Relative Standard Errors for Table 3.2;" 2 Relative Standard Errors for Table 3.2;" " Unit: Percents." " "," "," ",," "," "," "," "," "," "," ",," " " "," " "NAICS"," "," ","Net","Residual","Distillate","Natural","LPG and",,"Coke"," " "Code(a)","Subsector and Industry","Total","Electricity(b)","Fuel Oil","Fuel Oil(c)","Gas(d)","NGL(e)","Coal","and Breeze","Other(f)" ,,"Total United States" 311,"Food",4,5,25,20,5,27,6,0,10

485

RSE Table 5.2 Relative Standard Errors for Table 5.2  

U.S. Energy Information Administration (EIA) Indexed Site

2 Relative Standard Errors for Table 5.2;" 2 Relative Standard Errors for Table 5.2;" " Unit: Percents." " "," "," ",," ","Distillate"," "," ",," " " "," ",,,,"Fuel Oil",,,"Coal" "NAICS"," "," ","Net","Residual","and","Natural ","LPG and","(excluding Coal"," " "Code(a)","End Use","Total","Electricity(b)","Fuel Oil","Diesel Fuel(c)","Gas(d)","NGL(e)","Coke and Breeze)","Other(f)" ,,"Total United States" " 311 - 339","ALL MANUFACTURING INDUSTRIES"

486

RSE Table 7.3 Relative Standard Errors for Table 7.3  

U.S. Energy Information Administration (EIA) Indexed Site

3 Relative Standard Errors for Table 7.3;" 3 Relative Standard Errors for Table 7.3;" " Unit: Percents." ,,,"Electricity","Components",,"Natural Gas","Components",,"Steam","Components" " "," ",,,"Electricity",,,"Natural Gas",,,"Steam",," " " "," ",,"Electricity","from Sources",,"Natural Gas","from Sources",,"Steam","from Sources" " "," ","Electricity","from Local","Other than","Natural Gas","from Local","Other than","Steam","from Local","Other than"

487

Industry-Wide Error Rate Database in Power Switching: Switching Practices Survey  

Science Conference Proceedings (OSTI)

This report describes a survey that was conducted in 2013 to collect data on utility practices in operational power switching and on rates of switching errors. Over the years, the Electric Power Research Institute (EPRI) Switching Safety and Reliability (SS&R) project has developed two previous estimates of switching errors. These estimates were derived as part of research reported in the 1996 EPRI report Field Operation Power Switching Safety (TR-106465) and in the 2000 EPRI report ...

2013-11-19T23:59:59.000Z

488

Linearized error analysis for an accelerator and application to the APS injector synchrotron  

SciTech Connect

This paper presents a tolerance budget for accelerators dictated by the linear transverse dynamics of particle motion. The linearized equations satisfied by the particle motion when errors in the lattice are present are given along with the solution to these equations. The forms of these errors giving rise to the linearized equation are stated. These results are used to derive a tolerance budget for the Advanced Photon Source (APS) injector synchrotron.

Koul, R.K.; Mills, F.E.

1995-07-01T23:59:59.000Z

489

RSE Table 1.2 Relative Standard Errors for Table 1.2  

U.S. Energy Information Administration (EIA) Indexed Site

2 Relative Standard Errors for Table 1.2;" 2 Relative Standard Errors for Table 1.2;" " Unit: Percents." " "," "," "," "," "," "," "," "," "," "," " " "," "," ",," "," ",," "," ",," ","Shipments" "NAICS"," ",,"Net","Residual","Distillate","Natural","LPG and",,"Coke and"," ","of Energy Sources" "Code(a)","Subsector and Industry","Total(b)","Electricity(c)","Fuel Oil","Fuel Oil(d)","Gas(e)","NGL(f)","Coal","Breeze","Other(g)","Produced Onsite(h)"

490

RSE Table 7.7 Relative Standard Errors for Table 7.7  

U.S. Energy Information Administration (EIA) Indexed Site

7 Relative Standard Errors for Table 7.7;" 7 Relative Standard Errors for Table 7.7;" " Unit: Percents." ,,,"Electricity","Components",,"Natural Gas","Components",,"Steam","Components" " "," ",,,,,,,,,,," " " "," ",,,"Electricity",,,"Natural Gas",,,"Steam" " "," ",,"Electricity","from Sources",,"Natural Gas","from Sources",,"Steam","from Sources" "NAICS"," ","Electricity","from Local","Other than","Natural Gas","from Local","Other than","Steam","from Local","Other than"

491

An optical pattern recognition architecture implementing the mean-square-error correlation algorithm  

DOE Patents (OSTI)

The present invention relates to optical computing and image and pattern recognition systems and techniques in general and, more particularly, to an optical architecture for accomplishing real-time two-dimensional pattern recognition by implementing the so-called Mean-Square-Error'' correlation algorithm (also referred to as the Difference-Squared Error'' algorithm) for discriminating, i.e., recognizing two-dimensional patterns in gray-scale images. 16 figs.

Molley, P.A.

1990-03-26T23:59:59.000Z

492

A fuzzy set-based approach for modeling dependence among human errors  

Science Conference Proceedings (OSTI)

The assessment of dependence among human errors is an important aspect of human reliability analysis. When dependence between two tasks exists, the probability of the operators' failure on one task is higher if they have failed on the preceding task, ... Keywords: ADS, AI, ATWS, BHEP, BWR, CB, CHEP, COA, CSS, Dependence, FES, FFTA, FL, FRB, FS, Fuzzy expert system, Fuzzy rules elicitation, HEP, HRA, Human error, Human reliability analysis, MF, NPP, PSA, PSF, SLCS, TAF, THERP, TSC, UOD

E. Zio; P. Baraldi; M. Librizzi; L. Podofillini; V. N. Dang

2009-07-01T23:59:59.000Z

493

T-719:Apache mod_proxy_ajp HTTP Processing Error Lets Remote Users Deny  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

9:Apache mod_proxy_ajp HTTP Processing Error Lets Remote Users 9:Apache mod_proxy_ajp HTTP Processing Error Lets Remote Users Deny Service T-719:Apache mod_proxy_ajp HTTP Processing Error Lets Remote Users Deny Service September 16, 2011 - 11:30am Addthis PROBLEM: Apache mod_proxy_ajp HTTP Processing Error Lets Remote Users Deny Service PLATFORM: Apache version(s) prior to 2.2.21 ABSTRACT: A remote user can cause the backend server to remain in an error state until the retry timeout expires. reference LINKS: SecurityTracker Alert ID: 1026054 Apache Releases CVE-2011-3348 IMPACT ASSESSMENT: Medium Discussion: A vulnerability was reported in Apache mod_proxy_ajp. A remote user can cause denial of service conditions. When mod_proxy_ajp is used together with mod_proxy_balancer, a remote user can send specially crafted HTTP requests to place the backend server in an error state until the retry

494

Toxic chemicals and technological society: decision-making strategies when errors can be catastrophic  

SciTech Connect

Uncertainties about chemical dangers are so great that major errors seem inevitable; long lags before feedback may inhibit learning about errors in time to prevent irreversible, catastrophic consequences; the number of chemicals is enourmous, and sensible action requires esoteric knowledge. How have decision makers reponded to this predicament. It is shown that a diverse repertoire of regulatory procedures gradually evolved, encompassing an increasing number of toxics problems, in piecemeal response to poisoning incidents and other negative feedback. Advance testing strategies designed to eliminate lags between introduction of new chemicals and feedback about their dangers are analyzed. Another new regulatory strategy examined is intended to ease the problem of number by focusing attention on especially dangerous substances. Pesticide policy is analyzed. While costly errors occurred using trial and error, diverse forms of feedback led to substitution of less persistent pesticides and to regulatory processes that set priorities, reduce time lag, and use explicit strategies to mitigate the severity of remaining errors. The process by which chemical threats to the ozone layer were diagnosed and acted upon is examined. The author summarizes the analysis, presents a revised conception of decision making on risky technological issues, evaluates the known health effects from toxic chemicals, and suggests additional policy options. Overall, the research reveals surprisingly sensible strategies for preventing and mitigating potentially catastrophic errors; but implementation obstacles are severe.

Woodhouse, E.J.

1983-01-01T23:59:59.000Z

495

Efficiency Measures  

NLE Websites -- All DOE Office Websites (Extended Search)

recommended steam system energy efficiency measures Based on analyses implementation of steam system energy efficiency measures is driven primarily by cost metrics payback period...

496

Measured Performance Signature Method  

E-Print Network (OSTI)

The performance correction of systems that have many thermally integrated components is complex and subject to error if individual component misperformance and/or deterioration is present. The performance correction involves a set of equations or curves which relate the expected changes in dependent performance parameters (i.e. output, fuel consumption, etc.) to changes in the dependent parameters defining a standard condition (i.e. ambient temperatures, pressure, fuel composition, etc.). These relations and curves are usually generated by vendor performance programs which reflect the design data of the given plant components. However, such relations and curves applied to the overall correction of thermally integrated components can introduce significant correction error if the equipment performance differs from the expected design values. This can be particularly important in acceptance testing and base line monitoring of older plants where performance deterioration has occurred. The performance testing or monitoring of power plants requires that results be corrected to a given reference or standard condition. This correction procedure may be used in various applications, including determining compliance to a guarantee that is specified to a given reference, to compare different plants under similar operating conditions, and/or to track the performance of a given plant with time on a consistent basis. A Measured Performance Signature (MPS) approach has been developed to improve integrated system performance corrections. This procedure is useful for acceptance testing and continuous performance monitoring of industrial cogeneration plants or any energy system. The plant performance signature, is determined from on-line measurements, and corrected to a specified reference. This procedure provides information for adaptive on-line optimum dispatch, equipment performance monitoring, or for conducting system "what if' scenarios. The MPS is a very useful technique which may be applied to Acceptance Testing Monitoring and Operations Optimization. The technique is general and can be applied to all types of plant equipment and configurations.

Ahner, D. J.

1996-04-01T23:59:59.000Z

497

Nuclear Feedwater Flow Measurement Applications Guide  

Science Conference Proceedings (OSTI)

This report is a summary of the technologies available to measure the feedwater mass flow rate in nuclear power plants. Differential pressure meters, three types of ultrasonic flow meters (UFMs) (external transit time, chordal transit time, and cross-correlation), and tracer tests are discussed. For each technology, the report describes operating principles, installation, maintenance requirements, measurement errors, uncertainties, and the results of an industry survey.

1999-07-30T23:59:59.000Z

498

Humidity Measurements  

Science Conference Proceedings (OSTI)

Thermodynamic Quantities. Humidity Measurements. Rate our Services. Technical ... Special Tests of Humidity (36070S). Tests ...

2013-07-19T23:59:59.000Z

499

Theoretical analysis of error transfer from surface slope to refractive ray and their application to the solar concentrated collector  

E-Print Network (OSTI)

This paper presents the general equation to calculate the standard deviation of reflected ray error from optical error through geometry optics, applying the equation to calculate the standard deviation of reflected ray error for 8 kinds of solar concentrated reflector, provide typical results. The results indicate that the slope errors in two direction is transferred to any one direction of the focus ray when the incidence angle is more than 0 for solar trough and heliostats reflector; for point focus Fresnel lens, point focus parabolic glass mirror, line focus parabolic galss mirror, the error transferring coefficient from optical to focus ray will increase when the rim angle increase; for TIR-R concentrator, it will decrease; for glass heliostat, it relates to the incidence angle and azimuth of the reflecting point. Keywords: optic error, standard deviation, refractive ray error, concentrated solar collector

Huang, Weidong

2011-01-01T23:59:59.000Z

500

A computer simulated phantom study of tomotherapy dose optimization based on probability density functions (PDF) and potential errors caused by low reproducibility of PDF  

SciTech Connect

Lung tumor motion trajectories measured by four-dimensional CT or dynamic MRI can be converted to a probability density function (PDF), which describes the probability of the tumor at a certain position, for PDF based treatment planning. Using this method in simulated sequential tomotherapy, we study the dose reduction of normal tissues and more important, the effect of PDF reproducibility on the accuracy of dosimetry. For these purposes, realistic PDFs were obtained from two dynamic MRI scans of a healthy volunteer within a 2 week interval. The first PDF was accumulated from a 300 s scan and the second PDF was calculated from variable scan times from 5 s (one breathing cycle) to 300 s. Optimized beam fluences based on the second PDF were delivered to the hypothetical gross target volume (GTV) of a lung phantom that moved following the first PDF. The reproducibility between two PDFs varied from low (78%) to high (94.8%) when the second scan time increased from 5 s to 300 s. When a highly reproducible PDF was used in optimization, the dose coverage of GTV was maintained; phantom lung receiving 10%-20% prescription dose was reduced by 40%-50% and the mean phantom lung dose was reduced by 9.6%. However, optimization based on PDF with low reproducibility resulted in a 50% underdosed GTV. The dosimetric error increased nearly exponentially as the PDF error increased. Therefore, although the dose of the tumor surrounding tissue can be theoretically reduced by PDF based treatment planning, the reliability and applicability of this method highly depend on if a reproducible PDF exists and is measurable. By correlating the dosimetric error and PDF error together, a useful guideline for PDF data acquisition and patient qualification for PDF based planning can be derived.

Sheng, Ke; Cai Jing; Brookeman, James; Molloy, Janelle; Christopher, John; Read, Paul [Department of Radiation Oncology, University of Virginia, Charlottesville, Virginia 22908 (United States); Department of Radiology, University of Virginia, Charlottesville, Virginia 22908 (United States); Department of Radiation Oncology, University of Virginia, Charlottesville, Virginia 22908 and Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota 55905 (United States); Department of Radiology, University of Virginia, Charlottesville, Virginia 22908 (United States); Department of Radiation Oncology, University of Virginia, Charlottesville, Virginia 22908 (United States)

2006-09-15T23:59:59.000Z