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1

851 Variance Home Page  

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

10 CFR 851 Variance fact sheet 10 CFR 851 Variance regulations 10 CFR 851 Variance flow chart Lookup DOE regulations Lookup OSHA regulations Lookup OSHA variances Contact Us...

2

MCNP variance reduction overview  

Science Conference Proceedings (OSTI)

The MCNP code is rich in variance reduction features. Standard variance reduction methods found in most Monte Carlo codes are available as well as a number of methods unique to MCNP. We discuss the variance reduction features presently in MCNP as well as new ones under study for possible inclusion in future versions of the code.

Hendricks, J.S.; Booth, T.E.

1985-01-01T23:59:59.000Z

3

Nonnormality Increases Variance  

Science Conference Proceedings (OSTI)

Recently, a new theoretical and conceptual model of quasigeostrophic turbulence has been advanced in which eddy variance is regarded as being maintained by transient growth of perturbations arising from sources including the nonlinear ...

Petros J. Ioannou

1995-04-01T23:59:59.000Z

4

 

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

File 2: Building Activity File 2: Building Activity (cb86f02.csv) Ques- tion- naire Variable Variable Variable Variable item Description Name Position Format Building identifier BLDGID3 1- 5 Adjusted weight ADJWT3 7- 14 Variance stratum STRATUM3 16- 17 Pair member PAIR3 19- 19 Census region REGION3 21- 21 $REGION. Census division CENDIV3 23- 23 $CENDIV. B-2 Square footage SQFTC3 25- 26 $SQFTC. B-3 Any residential use RESUSE3 28- 28 $YESNO.

5

 

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

File 7: HVAC, Lighting, and Building Shell Conservation Features File 7: HVAC, Lighting, and Building Shell Conservation Features (cb86f07.csv) Ques- tion- naire Variable Variable Variable Variable item Description Name Position Format Building identifier BLDGID3 1- 5 Adjusted weight ADJWT3 7- 14 Variance stratum STRATUM3 16- 17 Pair member PAIR3 19- 19 Census region REGION3 21- 21 $REGION. Census division CENDIV3 23- 23 $CENDIV. B-2 Square footage SQFTC3 25- 26 $SQFTC.

6

 

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

4: Imputation Flags for HVAC, Lighting 4: Imputation Flags for HVAC, Lighting and Shell Conservation Features (cb86f14.csv) Ques- tion- naire Variable Variable Variable Variable item Description Name Position Format Building identifier BLDGID3 1- 5 Adjusted weight ADJWT3 7- 14 Variance stratum STRATUM3 16- 17 Pair member PAIR3 19- 19 Census region REGION3 21- 21 $REGION. Census division CENDIV3 23- 23 $CENDIV. B-2 Square footage SQFTC3 25- 26 $SQFTC.

7

 

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

File 4: Building Shell, Equipment, Energy Audits, File 4: Building Shell, Equipment, Energy Audits, and "Ohter" Conservation Features (cb86f04.csv) Ques- tion- naire Variable Variable Variable Variable item Description Name Position Format Building identifier BLDGID3 1- 5 Adjusted weight ADJWT3 7- 14 Variance stratum STRATUM3 16- 17 Pair member PAIR3 19- 19 Census region REGION3 21- 21 $REGION. Census division CENDIV3 23- 23 $CENDIV. B-2 Square footage SQFTC3 25- 26 $SQFTC.

8

 

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

File 8: Electricity File 8: Electricity (cb86f08.csv) Ques- tion- naire Variable Variable Variable Variable item Description Name Position Format Building identifier BLDGID3 1- 5 Adjusted weight ADJWT3 7- 14 Variance stratum STRATUM3 16- 17 Pair member PAIR3 19- 19 Census region REGION3 21- 21 $REGION. Census division CENDIV3 23- 23 $CENDIV. B-2 Square footage SQFTC3 25- 26 $SQFTC. Principal building activity PBA3 28- 29 $ACTIVTY.

9

 

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

File 3: Operating Hours File 3: Operating Hours (cb86f03.csv) Ques- tion- naire Variable Variable Variable Variable item Description Name Position Format Building identifier BLDGID3 1- 5 Adjusted weight ADJWT3 7- 14 Variance stratum STRATUM3 16- 17 Pair member PAIR3 19- 19 Census region REGION3 21- 21 $REGION. Census division CENDIV3 23- 23 $CENDIV. B-2 Square footage SQFTC3 25- 26 $SQFTC. Principal building activity PBA3 28- 29 $ACTIVTY.

10

 

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

3: Imputation Flags for Energy Audits, 3: Imputation Flags for Energy Audits, "Other" Conservation Features, and End Uses (cb86f13.csv) Ques- tion- naire Variable Variable Variable Variable item Description Name Position Format Building identifier BLDGID3 1- 5 Adjusted weight ADJWT3 7- 14 Variance stratum STRATUM3 16- 17 Pair member PAIR3 19- 19 Census region REGION3 21- 21 $REGION. Census division CENDIV3 23- 23 $CENDIV. B-2 Square footage SQFTC3 25- 26 $SQFTC.

11

Water permeation through stratum corneum lipid bilayers from atomistic simulations  

E-Print Network (OSTI)

Stratum corneum, the outermost layer of skin, consists of keratin filled rigid non-viable corneocyte cells surrounded by multilayers of lipids. The lipid layer is responsible for the barrier properties of the skin. We calculate the excess chemical potential and diffusivity of water as a function of depth in lipid bilayers with compositions representative of the stratum corneum using atomistic molecular dynamics simulations. The maximum in the excess free energy of water inside the lipid bilayers is found to be twice that of water in phospholipid bilayers at the same temperature. Permeability, which decreases exponentially with the free energy barrier, is reduced by several orders of magnitude as compared to with phospholipid bilayers. The average time it takes for a water molecule to cross the bilayer is calculated by solving the Smoluchowski equation in presence of the free energy barrier. For a bilayer composed of a 2:2:1 molar ratio of ceramide NS 24:0, cholesterol and free fatty acid 24:0 at 300K, we estimate the permeability P=3.7e-9 cm/s and the average crossing time \\tau_{av}=0.69 ms. The permeability is about 30 times smaller than existing experimental results on mammalian skin sections.

Chinmay Das; Peter D. Olmsted; Massimo G. Noro

2009-07-09T23:59:59.000Z

12

Contaminated Variance-Mean mixing model  

Science Conference Proceedings (OSTI)

The Generalised Normal Variance-Mean (GNVM) model in which the mixing random variable is Gamma distributed is considered. This model generalises the popular Variance-Gamma (VG) distribution. This GNVM model can be interpreted as the addition of noise ... Keywords: DIC, JAGS, Maximum likelihood estimation, Mixing representation, Normal Variance-Mean distribution, Variance-Gamma distribution

Thomas Fung, Joanna J. J. Wang, Eugene Seneta

2013-11-01T23:59:59.000Z

13

James-Stein type estimators of variances  

Science Conference Proceedings (OSTI)

In this paper we propose James-Stein type estimators for variances raised to a fixed power by shrinking individual variance estimators towards the arithmetic mean. We derive and estimate the optimal choices of shrinkage parameters under both the squared ... Keywords: 62H12, Inadmissibility, Shrinkage estimation, Shrinkage parameter, Squared loss function, Stein loss function, Variance estimation

Tiejun Tong; Homin Jang; Yuedong Wang

2012-05-01T23:59:59.000Z

14

 

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

1: Propane and District Chilled Water 1: Propane and District Chilled Water (cb86f11.csv) Ques- tion- naire Variable Variable Variable Variable item Description Name Position Format Building identifier BLDGID3 1- 5 Adjusted weight ADJWT3 7- 14 Variance stratum STRATUM3 16- 17 Pair member PAIR3 19- 19 Census region REGION3 21- 21 $REGION. Census division CENDIV3 23- 23 $CENDIV. B-2 Square footage SQFTC3 25- 26 $SQFTC. Principal building activity PBA3 28- 29 $ACTIVTY.

15

 

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

File10: District Steam and Hot Water File10: District Steam and Hot Water (cb86f10.csv) Ques- tion- naire Variable Variable Variable Variable item Description Name Position Format Building identifier BLDGID3 1- 5 Adjusted weight ADJWT3 7- 14 Variance stratum STRATUM3 16- 17 Pair member PAIR3 19- 19 Census region REGION3 21- 21 $REGION. Census division CENDIV3 23- 23 $CENDIV. B-2 Square footage SQFTC3 25- 26 $SQFTC. Principal building activity PBA3 28- 29 $ACTIVTY.

16

 

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

5: End Uses of Major Energy Sources 5: End Uses of Major Energy Sources (cb86f05.csv) Ques- tion- naire Variable Variable Variable Variable item Description Name Position Format Building identifier BLDGID3 1- 5 Adjusted weight ADJWT3 7- 14 Variance stratum STRATUM3 16- 17 Pair member PAIR3 19- 19 Census region REGION3 21- 21 $REGION. Census division CENDIV3 23- 23 $CENDIV. B-2 Square footage SQFTC3 25- 26 $SQFTC. Principal building activity PBA3 28- 29 $ACTIVTY.

17

 

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

File12: Imputation Flags for Summary Data, Building Activity, File12: Imputation Flags for Summary Data, Building Activity, Operating Hours, Shell and Equipment (cb86f12.csv) Ques- tion- naire Variable Variable Variable Variable item Description Name Position Format Building identifier BLDGID3 1- 5 Adjusted weight ADJWT3 7- 14 Variance stratum STRATUM3 16- 17 Pair member PAIR3 19- 19 Census region REGION3 21- 21 $REGION. Census division CENDIV3 23- 23 $CENDIV. B-2 Square footage SQFTC3 25- 26 $SQFTC.

18

ARM - Publications: Science Team Meeting Documents: Variance...  

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

Sciences, UCLA Neelin, David Department of Atmospheric and Oceanic Sciences, UCLA Thermodynamic variance similarity in shallow cumulus topped mixed layers is studied using...

19

Multiple Risks and Mean-Variance Preferences  

Science Conference Proceedings (OSTI)

We analyze comparative static effects under uncertainty when a decision maker has mean-variance preferences and faces a generic, quasi-linear decision problem with both an endogenous risk and a background risk. In terms of mean-variance preferences, ... Keywords: decision analysis, risk

Thomas Eichner; Andreas Wagener

2009-09-01T23:59:59.000Z

20

Reducing variance in batch partitioning measurements  

SciTech Connect

The partitioning experiment is commonly performed with little or no attention to reducing measurement variance. Batch test procedures such as those used to measure K{sub d} values (e.g., ASTM D 4646 and EPA402 -R-99-004A) do not explain how to evaluate measurement uncertainty nor how to minimize measurement variance. In fact, ASTM D 4646 prescribes a sorbent:water ratio that prevents variance minimization. Consequently, the variance of a set of partitioning measurements can be extreme and even absurd. Such data sets, which are commonplace, hamper probabilistic modeling efforts. An error-savvy design requires adjustment of the solution:sorbent ratio so that approximately half of the sorbate partitions to the sorbent. Results of Monte Carlo simulations indicate that this simple step can markedly improve the precision and statistical characterization of partitioning uncertainty.

Mariner, Paul E.

2010-08-11T23:59:59.000Z

Note: This page contains sample records for the topic "variance stratum stratum3" 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

Bilayer Structure and Lipid Dynamics in a Model Stratum Corneum with Oleic Acid  

DOE Green Energy (OSTI)

The stratum corneum is the uppermost layer of the skin and acts as a barrier to keep out contaminants and retain moisture. Understanding the molecular structure and behavior of this layer will provide guidance for optimizing its biological function. In this study we use a model mixture comprised of equimolar portions of ceramide NS (24:0), lignoceric acid, and cholesterol to model the effect of the addition of small amounts of oleic acid to the bilayer at 300 and 340 K. Five systems at each temperature have been simulated with concentrations between 0 and 0.1 mol % oleic acid. Our major finding is that subdiffusive behavior over the 200 ns time scale is evident in systems at 340 K, with cholesterol diffusion being enhanced with increased oleic acid. Importantly, cholesterol and other species diffuse faster when radial densities indicate nearest neighbors include more cholesterol. We also find that, with the addition of oleic acid, the bilayer midplane and interfacial densities are reduced and there is a 3% decrease in total thickness occurring mostly near the hydrophilic interface at 300 K with reduced overall density at 340 K. Increased interdigitation occurs independent of oleic acid with a temperature increase. Slight ordering of the long non-hydroxy fatty acid of the ceramide occurs near the hydrophilic interface as a function of the oleic acid concentration, but no significant impact on hydrogen bonding is seen in the chosen oleic acid concentrations.

Hoopes, Matthew I.; Noro, Massimo G.; Longo, Marjorie L.; Faller, Roland

2011-03-31T23:59:59.000Z

22

1/N versus Mean-Variance  

E-Print Network (OSTI)

for the mean-variance 1 It has been known since Mandelbrot (1963) that the return distributions of financial assets are fat tailed relative to the normal distribution (leptokurtic) and have more extreme... the expected utility of 1/N with the classical unconstrained expected utility. This portfolio rule tends to generate heavily leveraged portfolios with non-unit net exposure rendering any comparison with the 1/N rule questionable. We incorporate a budget...

Allen, David; Lizieri, Colin; Satchell, Stephen

2012-10-19T23:59:59.000Z

23

Minimizing weighted waiting time variance on a single processor  

Science Conference Proceedings (OSTI)

This paper considers the problem of scheduling n non-preemptive jobs on a single processor. Each job may have different size and weight. The objective is to minimize the weighted waiting time variance (WWTV). It is shown that the proof of one previous ... Keywords: Single processor scheduling, Weighted completion time variance, Weighted waiting time variance

Xiaoyun Xu

2011-11-01T23:59:59.000Z

24

Quantum and Classical Variance in the Quantum Realm  

E-Print Network (OSTI)

This paper examines the variance of quantum and classical predictions in the quantum realm, as well as unexpected presence and absence of variances. Some features are found that share an indirect commonality with the Aharonov-Bohm and Aharonov-Casher effects in that there is a quantum action in the absence of a force. Variances are also found in the presence of a force that are more subtle as they are of higher order. Significant variances related to the harmonic oscillator and particle in a box periods are found. This paper raises the question whether apparent quantum self-inconsistency may be examined internally, or must be empirically ascertained. These inherent variances may either point to inconsistencies in quantum mechanics that should be fixed, or that nature is manifestly more non-classical than expected. For the harmonic oscillator it is proven that the second spatial moment is the same in QM and CM.

Mario Rabinowitz

2007-07-08T23:59:59.000Z

25

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

26

Interpreting Conductivity Microstructure: Estimating the Temperature Variance Dissipation Rate  

Science Conference Proceedings (OSTI)

A simple model of the conductivity gradient spectrum is developed and used to interpret oceanic conductivity microstructure observations. A principal goal is to estimate the correction factor E for inferring the temperature variance dissipation ...

Libe Washburn; Timothy F. Duda; David C. Jacobs

1996-12-01T23:59:59.000Z

27

Estimating Salinity Variance Dissipation Rate from Conductivity Microstructure Measurements  

Science Conference Proceedings (OSTI)

At the smallest length scales, conductivity measurements include a contribution from salinity fluctuations in the inertial–convective and viscous–diffusive ranges of the turbulent scalar variance spectrum. Interpreting these measurements is ...

Jonathan D. Nash; James N. Moum

1999-02-01T23:59:59.000Z

28

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

29

Quantum Fisher Information as the Convex Roof of Variance  

E-Print Network (OSTI)

Quantum Fisher information places the fundamental limit to the accuracy of estimating an unknown parameter. Here we shall provide the quantum Fisher information an operational meaning: a mixed state can be so prepared that a given observable has the minimal averaged variance, which equals exactly to the quantum Fisher information for estimating an unknown parameter generated by the unitary dynamics with the given observable as Hamiltonian. In particular we shall prove that the quantum Fisher information is the convex roof of the variance, as conjectured by Toth and Petz based on numerical and analytical evidences, by constructing explicitly a pure-state ensemble of the given mixed state in which the averaged variance of a given observable equals to the quantum Fisher information.

Sixia Yu

2013-02-21T23:59:59.000Z

30

Submean variance bound for effective resistance of random electric networks  

E-Print Network (OSTI)

We study a model of random electric networks with Bernoulli resistances. In the case of the lattice Z^2, we show that the point-to-point effective resistance between 0 and a vertex v has a variance of order at most (log |v|)^(2/3) whereas its expected value is of order log |v|, when v goes to infinity. When the dimension of Z^d is different than 2, expectation and variance are of the same order. Similar results are obtained in the context of p-resistance. The proofs rely on a modified Poincare inequality due to Falik and Samorodnitsky.

Itai Benjamini; Raphael Rossignol

2006-10-12T23:59:59.000Z

31

On Production and Dissipation of Thermal Variance in the Oceans  

Science Conference Proceedings (OSTI)

An integral relationship is derived expressing the total dissipation of thermal variance by oceanic microstructure in terms of the large-scale forcing at the ocean surface by air/sea heat exchange. The net heat gain by the ocean over warm water ...

Terrence M. Joyce

1980-03-01T23:59:59.000Z

32

Estimates of Production Cost Variance Using Chronological Simulation  

Science Conference Proceedings (OSTI)

Forecasts of production costs are key inputs in the operational planning decisions of electric power utilities. This report describes the effects of uncertainty in annual load variation and uncertainty in generation availability on the variance of cost in an electrical power system.

1999-09-29T23:59:59.000Z

33

Spatial analysis based on variance of moving window averages  

E-Print Network (OSTI)

R02 R04 R06 R08 R16 I n Window size B R02 R06 R10 R14 R20R04 R08 R12 R16 R24 R36 I n Window size Wu et al. , Fig. 2Based on Variance of Moving Window Averages B. M. Wu, K. V.

Wu, B M; Subbarao, K V; Ferrandino, F J; Hao, J J

2006-01-01T23:59:59.000Z

34

Quantum Variance and Ergodicity for the baker's map  

E-Print Network (OSTI)

We prove a Egorov theorem, or quantum-classical correspondence, for the quantised baker's map, valid up to the Ehrenfest time. This yields a logarithmic upper bound for the decay of the quantum variance, and, as a corollary, a quantum ergodic theorem for this map.

Mirko Degli Esposti; Stéphane Nonnenmacher; Brian Winn

2004-12-16T23:59:59.000Z

35

Prompt Neutron Decay Constant from Feynman Variance Fitting  

SciTech Connect

The use of fast-response liquid scintillators for passive measurements with highly enriched uranium (HEU) castings provides information on the timescale of the fission chain multiplication process for HEU. Thus, these detectors produce time responses characteristic of the HEU and not the moderator around 3He counters. Up to five HEU castings were assembled and the passive time coincidence measurements performed. The prompt neutron decay constants inferred from the Feynman variance data with the arrays of large liquid scintillators are compared with decay constants obtained from previously presented Feynman variance data collected in active interrogation measurements with these same HEU castings. The active measurements used plastic scintillation detectors adjacent to the castings to eliminate time-of-flight effects and showed that the prompt neutron decay constant is clearly not exponential. However, time-of-flight effects in the passive measurements result in exponential behavior and allow the Feynman variance data to be fit with the well-known point kinetics analytical formula. The characterization of the prompt neutron decay constant is investigated by comparing the results of the passive and active measurement data.

McConchie, Seth M [ORNL; Hausladen, Paul [ORNL; Mihalczo, John T [ORNL

2009-01-01T23:59:59.000Z

36

September 2000Forecasting Future Variance from Option Prices  

E-Print Network (OSTI)

Although it is widely believed that option prices provide the best possible forecasts of the future variance of the assets which underlie them, a large body of empirical evidence concludes that option prices consistently yield biased forecasts of future variance. The prevailing interpretation of these findings is that option investors may be forming unbiased forecasts of the future variance of underlying assets but that these unbiased forecasts fail to get impounded into option prices because of either (1) the difficulty of carrying out the necessary arbitrage strategies that would force the prices to their proper levels, or (2) the availability to market makers of lucrative alternative strategies in which they simply profit from the large bid-ask spreads in the options markets. This interpretation has significant consequences for nearly the entire range of option pricing research, since it implies that non-continuous trading, bid-ask spreads, and other market imperfections substantially influence option prices. This implication is important, both because incorporating these types of market imperfections into option pricing models is much more difficult than, for example, altering the dynamics of the underlying asset and also because it suggests that researchers cannot learn about option investor expectations by filtering option

Allen M. Poteshman; Mark R. Manfredo; Allen M. Poteshman; Allen M. Poteshman; Champaign Helpful; Jegadeesh Narasimhan

2000-01-01T23:59:59.000Z

37

Reduced Variance for Material Sources in Implicit Monte Carlo  

SciTech Connect

Implicit Monte Carlo (IMC), a time-implicit method due to Fleck and Cummings, is used for simulating supernovae and inertial confinement fusion (ICF) systems where x-rays tightly and nonlinearly interact with hot material. The IMC algorithm represents absorption and emission within a timestep as an effective scatter. Similarly, the IMC time-implicitness splits off a portion of a material source directly into the radiation field. We have found that some of our variance reduction and particle management schemes will allow large variances in the presence of small, but important, material sources, as in the case of ICF hot electron preheat sources. We propose a modification of our implementation of the IMC method in the Jayenne IMC Project. Instead of battling the sampling issues associated with a small source, we bypass the IMC implicitness altogether and simply deterministically update the material state with the material source if the temperature of the spatial cell is below a user-specified cutoff. We describe the modified method and present results on a test problem that show the elimination of variance for small sources.

Urbatsch, Todd J. [Los Alamos National Laboratory

2012-06-25T23:59:59.000Z

38

THE COLUMN DENSITY VARIANCE-M{sub s} RELATIONSHIP  

SciTech Connect

Although there is a wealth of column density tracers for both the molecular and diffuse interstellar medium, there are few observational studies investigating the relationship between the density variance ({sigma}{sup 2}) and the sonic Mach number (M{sub s}). This is in part due to the fact that the {sigma}{sup 2}-M{sub s} relationship is derived, via MHD simulations, for the three-dimensional (3D) density variance only, which is not a direct observable. We investigate the utility of a 2D column density {sigma}{sub {Sigma}/{Sigma}0}{sup 2}-M{sub s} relationship using solenoidally driven isothermal MHD simulations and find that the best fit follows closely the form of the 3D density {sigma}{sub {rho}/{rho}0}{sup 2}-M{sub s} trend but includes a scaling parameter A such that {sigma}{sub ln({Sigma}/{Sigma}o)} = A x ln(1+b{sup 2} M{sub s}{sup 2}), where A = 0.11 and b = 1/3. This relation is consistent with the observational data reported for the Taurus and IC 5146 molecular clouds with b = 0.5 and A = 0.16, and b = 0.5 and A = 0.12, respectively. These results open up the possibility of using the 2D column density values of {sigma}{sup 2} for investigations of the relation between the sonic Mach number and the probability distribution function (PDF) variance in addition to existing PDF sonic Mach number relations.

Burkhart, Blakesley; Lazarian, A. [Astronomy Department, University of Wisconsin, Madison, 475 N. Charter St., WI 53706 (United States)

2012-08-10T23:59:59.000Z

39

Dependence of Turbulent and Mesoscale Velocity Variances on Scale and Stability  

Science Conference Proceedings (OSTI)

The scale dependence of velocity variances is studied using data collected from a grassland site, a heather site, and four forested sites. The dependence of velocity variances on averaging time, used to define the fluctuation quantities, is ...

L. Mahrt; Erin Moore; Dean Vickers; N. O. Jensen

2001-03-01T23:59:59.000Z

40

Residential energy consumption: An analysis-of-variance study  

SciTech Connect

In this report, tests of statistical significance of five sets of variables with household energy consumption (at the point of end-use) are described. Five models, in sequence, were empirically estimated and tested for statistical significance by using the Residential Energy Consumption Survey of the US Department of Energy, Energy Information Administration. Each model incorporated additional information, embodied in a set of variables not previously specified in the energy demand system. The variable sets were generally labeled as economic variables, weather variables, household-structure variables, end-use variables, and housing-type variables. The tests of statistical significance showed each of the variable sets to be highly significant in explaining the overall variance in energy consumption. The findings imply that the contemporaneous interaction of different types of variables, and not just one exclusive set of variables, determines the level of household energy consumption.

Poyer, D.A.

1992-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "variance stratum stratum3" 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

GOES8 Xray sensor variance stabilization using the multiscale datadriven HaarFisz transform.  

E-Print Network (OSTI)

­variance relationship within the XRS data. Transforming such data so that its variance is stable and its distribution of the distribution are unknown. We introduce a method, the data­driven Haar­Fisz transform (DDHFT), which uses Haar a severe solar storm disabled the electrical grid in Quebec for 9 hours, see Taubes (1999) for further

Nason, Guy

42

Temporal and Spatial Aspects of Velocity Variance in the Urban Surface Roughness Layer  

Science Conference Proceedings (OSTI)

Data from six urban areas in a nationwide network of sites within the surface roughness layer are examined. It is found that the average velocity variances in time, derived by averaging the conventional variances from a network of n stations, are ...

Bruce B. Hicks; Elena Novakovskaia; Ronald J. Dobosy; William R. Pendergrass III; William J. Callahan

2013-03-01T23:59:59.000Z

43

The Origin of Temporal Variance in Long-Lived Trace Constituents in the Summer Stratosphere  

Science Conference Proceedings (OSTI)

Temporal variances in the concentrations of N2O, CF2Cl2, CFCl3 and CH4 in the summer stratosphere at a midlatitude location have been measured by Ehhalt and others. A simple dynamical model is used to argue that these variances are created by ...

Peter G. Hess; James R. Holton

1985-07-01T23:59:59.000Z

44

Kriging metamodel with modified nugget-effect: The heteroscedastic variance case  

Science Conference Proceedings (OSTI)

Metamodels are commonly used to approximate and analyze simulation models. However, in cases where the simulation output variances are non-zero and not constant, many of the current metamodels which assume homogeneity, fail to provide satisfactory estimation. ... Keywords: Heterogeneous variance, Kriging, Metamodel, Nugget-effect, Simulation

J. Yin; S. H. Ng; K. M. Ng

2011-10-01T23:59:59.000Z

45

How to Define Mean, Variance, etc., for Heavy-Tailed Distributions: A Fractal-Motivated  

E-Print Network (OSTI)

How to Define Mean, Variance, etc., for Heavy-Tailed Distributions: A Fractal-Motivated Approach, USA vladik@utep.edu, olgak@utep.edu Abstract In many practical situations, we encounter heavy. In many such situations, the variance is infinite; such distributions are called heavy

Kreinovich, Vladik

46

Verification of the history-score moment equations for weight-window variance reduction  

Science Conference Proceedings (OSTI)

The history-score moment equations that describe the moments of a Monte Carlo score distribution have been extended to weight-window variance reduction, The resulting equations have been solved deterministically to calculate the population variance of the Monte Carlo score distribution for a single tally, Results for one- and two-dimensional one-group problems are presented that predict the population variances to less than 1% deviation from the Monte Carlo for one-dimensional problems and between 1- 2% for two-dimensional problems,

Solomon, Clell J [Los Alamos National Laboratory; Sood, Avneet [Los Alamos National Laboratory; Booth, Thomas E [Los Alamos National Laboratory; Shultis, J. Kenneth [KANSAS STATE UNIV.

2010-12-06T23:59:59.000Z

47

GRR/Section 18-HI-d - Variance from Pollution Control | Open Energy  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » GRR/Section 18-HI-d - Variance from Pollution Control < GRR Jump to: navigation, search GRR-logo.png GEOTHERMAL REGULATORY ROADMAP Roadmap Home Roadmap Help List of Sections Section 18-HI-d - Variance from Pollution Control 18HID - VarianceFromPollutionControl (4).pdf Click to View Fullscreen Contact Agencies Hawaii Department of Health Clean Water Branch Regulations & Policies Wastewater Systems Triggers None specified Click "Edit With Form" above to add content 18HID - VarianceFromPollutionControl (4).pdf Error creating thumbnail: Page number not in range.

48

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

49

Temperature and Water Vapor Variance Scaling in Global Models: Comparisons to Satellite and Aircraft Data  

Science Conference Proceedings (OSTI)

Observations of the scale dependence of height-resolved temperature T and water vapor q variability are valuable for improved subgrid-scale climate model parameterizations and model evaluation. Variance spectral benchmarks for T and q obtained ...

B. H. Kahn; J. Teixeira; E. J. Fetzer; A. Gettelman; S. M. Hristova-Veleva; X. Huang; A. K. Kochanski; M. Köhler; S. K. Krueger; R. Wood; M. Zhao

2011-09-01T23:59:59.000Z

50

Stochastic Forcing of Perturbation Variance in Unbounded Shear and Deformation Flows  

Science Conference Proceedings (OSTI)

The problem of growth of small perturbations in fluid flow and the related problem of maintenance of perturbation variance has traditionally been studied by appeal to exponential modal instability of the flow. In the event that a flow supports an ...

Brian F. Farrell; Petros J. Ioannou

1993-01-01T23:59:59.000Z

51

Sensitivity of Perturbation Variance and Fluxes in Turbulent Jets to Changes in the Mean Jet  

Science Conference Proceedings (OSTI)

Synoptic-scale eddy variance and fluxes of heat and momentum in midlatitude jets are sensitive to small changes in mean jet velocity, dissipation, and static stability. In this work the change in the jet producing the greatest increase in ...

Brian F. Farrell; Petros J. Ioannou

2004-11-01T23:59:59.000Z

52

Variance Ratios, Loss of Energy and Regression in Satellite Temperature Retrievals  

Science Conference Proceedings (OSTI)

Several recent papers have reported that temperatures from satellites lack the variance found in radiosonde temperatures. Because of these results, we performed an experiment to distinguish between limitations of the satellite processing system ...

Larry M. McMillin; Charles A. Dean

1982-04-01T23:59:59.000Z

53

Internal resistance variances in lithium-ion batteries and implications in manufacturing  

E-Print Network (OSTI)

This thesis addresses issues in manufacturing that lead to cell DC internal resistance (DCIR) variance, provides an overview of generally accepted cell degradation mechanisms and modeling techniques associated with IR as ...

Gogoana, Radu

2012-01-01T23:59:59.000Z

54

Permits and Variances for Solar Panels, Calculation of Impervious Cover (Maryland)  

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

In May 2012 Maryland enacted legislation stating that any calculation of "impervious surface" required by state or local authorities as part of a permit or variance relating to zoning, construction...

55

A Simple Test for Equality of Variances in Monthly Climate Data  

Science Conference Proceedings (OSTI)

Tests for equality of variances of monthly climate data using resampling techniques are discussed. The application of a jackknife test to spatially correlated time series is worked out in this paper. Besides this spatial extension, it is also ...

Jules J. Beersma; T. Adri Buishand

1999-06-01T23:59:59.000Z

56

Scale dependency of total water variance, and its implication for cloud parameterizations  

Science Conference Proceedings (OSTI)

The scale dependency of variance of total water mixing ratio is explored by analyzing data from a General Circulation Model (GCM), a Numerical Weather Prediction Model (NWP) and Large Eddy Simulations (LES). For clarification Direct Numerical ...

Vera Schemann; Bjorn Stevens; Verena Grützun; Johannes Quaas

57

Relationship of the Variances of Temperature and Velocity to Atmospheric Static Stability—Application to Radar and Acoustic Sounding  

Science Conference Proceedings (OSTI)

The relationship between the variances of temperature and vertical velocity fluctuations is examined experimentally and theoretically. Comparison of the variance data and the mean gradient data recorded on the 300 m tower at the Boulder ...

Earl E. Gossard; A. Shelby Frisch

1987-08-01T23:59:59.000Z

58

THE COLUMN DENSITY VARIANCE IN TURBULENT INTERSTELLAR MEDIA: A FRACTAL MODEL APPROACH  

Science Conference Proceedings (OSTI)

Fractional Brownian motion structures are used to investigate the dependency of column density variance ({sigma}{sup 2}{sub lnN}) in the turbulent interstellar medium on the variance of three-dimensional density ({sigma}{sup 2}{sub ln{rho}}) and the power-law slope of the density power spectrum. We provide quantitative expressions to infer the three-dimensional density variance, which is not directly observable, from the observable column density variance and spectral slope. We also investigate the relationship between the column density variance and sonic Mach number (M{sub s}) in the hydrodynamic (HD) regime by assuming the spectral slope and density variance to be functions of sonic Mach number, as obtained from the HD turbulence simulations. They are related by the expression {sigma}{sup 2}{sub lnN} = A{sigma}{sub ln{rho}} {sup 2} = Aln (1 + b {sup 2} M{sup 2}{sub s}), suggested by Burkhart and Lazarian for the magnetohydrodynamic case. The proportional constant A varies from Almost-Equal-To 0.2 to Almost-Equal-To 0.4 in the HD regime as the turbulence forcing parameter b increases from 1/3 (purely solenoidal forcing) to 1 (purely compressive forcing). It is also discussed that the parameter A is lowered in the presence of a magnetic field.

Seon, Kwang-Il, E-mail: kiseon@kasi.re.kr [Korea Astronomy and Space Science Institute, Daejeon 305-348 (Korea, Republic of); Astronomy and Space Science Major, University of Science and Technology, Daejeon 305-350 (Korea, Republic of)

2012-12-20T23:59:59.000Z

59

Variance Analysis of Wind and Natural Gas Generation under Different Market Structures: Some Observations  

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

Variance Analysis of Wind and Variance Analysis of Wind and Natural Gas Generation under Different Market Structures: Some Observations Brian Bush, Thomas Jenkin, David Lipowicz, and Douglas J. Arent National Renewable Energy Laboratory Roger Cooke Resources for the Future Technical Report NREL/TP-6A20-52790 January 2012 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401 303-275-3000 * www.nrel.gov Contract No. DE-AC36-08GO28308 Variance Analysis of Wind and Natural Gas Generation under Different Market Structures: Some Observations Brian Bush, Thomas Jenkin, David Lipowicz,

60

Statistical modelling of tropical cyclone tracks: a comparison of models for the variance of trajectories  

E-Print Network (OSTI)

We describe results from the second stage of a project to build a statistical model for hurricane tracks. In the first stage we modelled the unconditional mean track. We now attempt to model the unconditional variance of fluctuations around the mean. The variance models we describe use a semi-parametric nearest neighbours approach in which the optimal averaging length-scale is estimated using a jack-knife out-of-sample fitting procedure. We test three different models. These models consider the variance structure of the deviations from the unconditional mean track to be isotropic, anisotropic but uncorrelated, and anisotropic and correlated, respectively. The results show that, of these models, the anisotropic correlated model gives the best predictions of the distribution of future positions of hurricanes.

Hall, T; Hall, Tim; Jewson, Stephen

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "variance stratum stratum3" 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

Stability effects on the profiles of vertical velocity and its variance in katabatic flow  

DOE Green Energy (OSTI)

The atmospheric katabatic flow in the foothills of the Front Range of the Rocky Mountains has been monitored by a network of towers and sodars for several years as part of the Atmospheric Studies in Complex Terrain (ASCOT) program. The dependence of the vertical component of motion, its variance, and the mean component of the wind perpendicular to the surface at the mouth of Coal Creek Canyon on surface cooling and channeling by winds above the canyon has been explored by using almost three years of data from the network. The magnitude of the near-surface temperature differences was found to decrease with increasing surface cooling in light winds, apparently because of increasing turbulence resulting when increasing winds interact with surface topography. The variance of vertical velocity exhibits three types of vertical profiles, corresponding to different cooling rates and external wind speeds. The mean variance was found to depend strongly on a locally derived Richardson number.

Coulter, R.L.; Martin, T.J.

1994-10-01T23:59:59.000Z

62

Stochastic Modelling and 3D Minimum Variance RecursiveEstimation of Image Sequences  

Science Conference Proceedings (OSTI)

In this paper the 3D minimum variance filtering problem is considered. The proposed spatiotemporal filter is derived according to the assumption that the 3D signal can be modelled by an ensemble of smooth 3D gaussian random fields. The resulting ... Keywords: image processing, optimal filtering, stochastic modelling

L. Jetto

1999-07-01T23:59:59.000Z

63

The efficiency of the crude oil markets: Evidence from variance ratio tests  

E-Print Network (OSTI)

-form efficient market hy- pothesis for two oil crude markets (UK Brent and US West Texas Intermediate) is testedThe efficiency of the crude oil markets: Evidence from variance ratio tests Amélie CHARLES Audencia the random walk hypothesis for the crude oil markets, using daily data over the period 1982­2008. The weak

Recanati, Catherine

64

Estimates of Analysis and Forecast Error Variances Derived from the Adjoint of 4D-Var  

Science Conference Proceedings (OSTI)

A method is presented in which the adjoint of a four-dimensional variational data assimilation system (4D-Var) was used to compute the expected analysis and forecast error variances of linear functions of the ocean state vector. The power and ...

Andrew M. Moore; Hernan G. Arango; Gregoire Broquet

2012-10-01T23:59:59.000Z

65

Variance Optimal Hedging for continuous time processes with independent increments and applications  

E-Print Network (OSTI)

For a large class of vanilla contingent claims, we establish an explicit F\\"ollmer-Schweizer decomposition when the underlying is a process with independent increments (PII) and an exponential of a PII process. This allows to provide an efficient algorithm for solving the mean variance hedging problem. Applications to models derived from the electricity market are performed.

Goutte, Stéphane; Russo, Francesco

2009-01-01T23:59:59.000Z

66

The relationship between an adaptive quantizer and a variance estimator (Corresp.)  

Science Conference Proceedings (OSTI)

In this correspondence, it is shown that an adaptive quantizer with a one word memory can be viewed as one that estimates the variance of its input and normalizes the input by the square root of the estimate. It is shown that, even though the estimate ...

D. Cohn; J. Melsa

1975-11-01T23:59:59.000Z

67

Moving Spectral Variance and Coherence Analysis and Some Applications on Long Air Temperature Series  

Science Conference Proceedings (OSTI)

Climatic records of a long time series (e.g., centuries) may be nonstationary. Thus, the stability of the variance (power) spectrum over a sequence of time periods is examined. Moreover, it is important to use different algorithms and tests in ...

C-D. Schönwiese

1987-12-01T23:59:59.000Z

68

GOES-8 X-ray sensor variance stabilization using the multiscale data-driven Haar-Fisz transform.  

E-Print Network (OSTI)

-variance relationship within the XRS data. Transforming such data so that its variance is stable and its distribution of the distribution are unknown. We introduce a method, the data-driven Haar-Fisz transform (DDHFT), which uses Haar a severe solar storm disabled the electrical grid in Quebec for 9 hours, see Taubes (1999) for further

Nason, Guy

69

Estimation of the Analysis Error Variance of the 500 mb Height Analyses in the Northern Hemisphere, 1946–79  

Science Conference Proceedings (OSTI)

The yearly variances of the analysis error of the 500 mb height north of 20°N are estimated from analyses covering the period 1946–79. A new method is presented. The error variances are computed directly from the analyses without any assumptions ...

Juhani Rinne; Simo Järvenoja

1983-07-01T23:59:59.000Z

70

USE OF SELECTED HOS INFORMATION FOR LOW-VARIANCE ESTIMATION OF BANDLIMITED SYSTEMS WITH SHORT DATA RECORDS  

E-Print Network (OSTI)

RECORDS Haralambos Pozidis and Athina P. Petropuku Electrical and Computer Engineering Department Drexel appears to result in much lower estimation variance, as compared to other entire-bispectrum based of the variance of the system estimates on the HOS slice used, and the usage of the criterion for slice se

Petropulu, Athina P.

71

Variance-reduction technique for Coulomb-nuclear thermalization of energetic fusion products in hot plasmas  

SciTech Connect

A variance-reduction technique involving use of exponential transform and angular-biasing methods has been developed. Its purpose is to minimize the variance and computer time involved in estimating the mean fusion product (fp) energy deposited in a hot, multi-region plasma under the influence of small-energy transfer Coulomb collisions and large-energy transfer nuclear elastic scattering (NES) events. This technique is applicable to high-temperature D-/sup 3/He, Cat. D and D-T plasmas which have highly energetic fps capable of undergoing NES. A first application of this technique is made to a D-/sup 3/He Field Reversed Mirror (FRM) where the Larmor radius of the 14.7 MeV protons are typically comparable to the plasma radius (plasma radius approx. 2 fp gyroradii) and the optimistic fp confinement (approx. 45% of 14.7 MeV protons) previously predicted is vulnerable to large orbit perturbations induced by NES. In the FRM problem, this variance reduction technique is used to estimate the fractional difference in the average fp energy deposited in the closed-field region, E/sub cf/, with and without NES collisions.

DeVeaux, J.C.; Miley, G.H.

1982-01-01T23:59:59.000Z

72

Variance in the Verification and Validation Process for Non-Safety-Related Digital Equipment  

Science Conference Proceedings (OSTI)

This report describes the various processes, procedures, and guidance within a sample of nuclear utilities and vendors associated with the verification and validation (V&V) process for safety- related and non-safety-related digital equipment. This report focuses primarily on the variance in non-safety-related V&V, but it includes recommendations for safety-related V&V, as well. This report describes current practices, explains some lessons learned regarding the use of some industry and utility-specific p...

2008-12-09T23:59:59.000Z

73

Variance Optimal Hedging for discrete time processes with independent increments. Application to Electricity Markets  

E-Print Network (OSTI)

We consider the discretized version of a (continuous-time) two-factor model introduced by Benth and coauthors for the electricity markets. For this model, the underlying is the exponent of a sum of independent random variables. We provide and test an algorithm, which is based on the celebrated Foellmer-Schweizer decomposition for solving the mean-variance hedging problem. In particular, we establish that decomposition explicitely, for a large class of vanilla contingent claims. Interest is devoted in the choice of rebalancing dates and its impact on the hedging error, regarding the payoff regularity and the non stationarity of the log-price process.

Goutte, Stéphane; Russo, Francesco

2012-01-01T23:59:59.000Z

74

A Model-Free No-arbitrage Price Bound for Variance Options  

SciTech Connect

We suggest a numerical approximation for an optimization problem, motivated by its applications in finance to find the model-free no-arbitrage bound of variance options given the marginal distributions of the underlying asset. A first approximation restricts the computation to a bounded domain. Then we propose a gradient projection algorithm together with the finite difference scheme to solve the optimization problem. We prove the general convergence, and derive some convergence rate estimates. Finally, we give some numerical examples to test the efficiency of the algorithm.

Bonnans, J. Frederic, E-mail: frederic.bonnans@inria.fr [Ecole Polytechnique, INRIA-Saclay (France); Tan Xiaolu, E-mail: xiaolu.tan@polytechnique.edu [Ecole Polytechnique, CMAP (France)

2013-08-01T23:59:59.000Z

75

Turbulent Velocity-Variance Profiles in the Stable Boundary Layer Generated by a Nocturnal Low-Level Jet  

Science Conference Proceedings (OSTI)

Profiles of mean winds and turbulence were measured by the High Resolution Doppler lidar in the strong-wind stable boundary layer (SBL) with continuous turbulence. The turbulence quantity measured was the variance of the streamwise wind velocity ...

Robert M. Banta; Yelena L. Pichugina; W. Alan Brewer

2006-11-01T23:59:59.000Z

76

Similarity Relationships in the Marine Atmospheric Surface Layer for Terms in the TKE and Scalar Variance Budgets  

Science Conference Proceedings (OSTI)

Measurements of the momentum, heat, moisture, energy, and scalar variance fluxes are combined with dissipation estimates to investigate the behavior of marine surface layer turbulence. These measurements span a wide range of atmospheric stability ...

J. B. Edson; C. W. Fairall

1998-07-01T23:59:59.000Z

77

Fast Lidar and Radar Multiple-Scattering Models. Part I: Small-Angle Scattering Using the Photon Variance–Covariance Method  

Science Conference Proceedings (OSTI)

A fast, approximate method is described for the calculation of the intensity of multiply scattered lidar returns from clouds. At each range gate it characterizes the outgoing photon distribution by its spatial variance, the variance of photon ...

Robin J. Hogan

2008-12-01T23:59:59.000Z

78

Genetic variation in Atlantic yellowfin tuna (Thunnus albacares) to assess stock structure and reproductive variance  

E-Print Network (OSTI)

The population genetic structure of Atlantic yellowfin tuna (Thunnus albacares) has received little attention despite the substantial fishing mortality of juveniles caused by purse seining around fish aggregating devices in the Gulf of Guinea targeting multi-species schools that also include similarly sized skipjack tuna (Katsuwonus pelamis) and bigeye tuna (T. obesus). We used sequence data from 355 bp of the mitochondrial control region I as well as six microsatellite loci to examine: (1) population structure, and (2) to look for evidence of reproductive variance. We analyzed two samples of adults from the Gulf of Mexico (GOM) and one sample of early juveniles (20-50 mm) from the Gulf of Guinea (GOG). We found no evidence of geographic or temporal differentiation among the samples. Accordingly, the null hypothesis of panmixia for yellowfin tuna in the Atlantic Ocean could not be rejected. A sudden expansion analysis based on mtDNA control region I sequence data of yellowfin tuna was highly significant. Time estimates for expansion were between 40,000 and 80,000 years before present. The associated high levels of homoplasy could be masking any existing population structure. Additional sampling from additional locations and across several years will be needed to test the hypothesis of panmixia. We also provide preliminary evidence of the Allendorf-Phelps effect, which may contribute to reproductive variance. This is the first evidence of this effect in any other tuna or pelagic species. Data indicates that early juveniles sharing the same mtDNA control region I haplotype were caught in the same tow and had a significant probability of halfsibship status as calculated from their haplotype and genotype at one microsatellite locus through kinship analysis. Sampling throughout the spawning season and across several years, as well as analysis with additional microsatellite loci that have a more even distribution of alleles, will be needed to more fully identify the sibling status of larvae and early juveniles caught in the same tow as well as the extent of this reproductive variance.

Farnham, Tiffany Talley

2003-12-01T23:59:59.000Z

79

Improving computational efficiency of Monte-Carlo simulations with variance reduction  

E-Print Network (OSTI)

CCFE perform Monte-Carlo transport simulations on large and complex tokamak models such as ITER. Such simulations are challenging since streaming and deep penetration effects are equally important. In order to make such simulations tractable, both variance reduction (VR) techniques and parallel computing are used. It has been found that the application of VR techniques in such models significantly reduces the efficiency of parallel computation due to 'long histories'. VR in MCNP can be accomplished using energy-dependent weight windows. The weight window represents an 'average behaviour' of particles, and large deviations in the arriving weight of a particle give rise to extreme amounts of splitting being performed and a long history. When running on parallel clusters, a long history can have a detrimental effect on the parallel efficiency - if one process is computing the long history, the other CPUs complete their batch of histories and wait idle. Furthermore some long histories have been found to be effect...

Turner, A

2013-01-01T23:59:59.000Z

80

No-migration variance petition: Draft. Volume 4, Appendices DIF, GAS, GCR (Volume 1)  

SciTech Connect

The Department of Energy is responsible for the disposition of transuranic (TRU) waste generated by national defense-related activities. Approximately 2.6 million cubic feet of the se waste have been generated and are stored at various facilities across the country. The Waste Isolation Pilot Plant (WIPP), was sited and constructed to meet stringent disposal requirements. In order to permanently dispose of TRU waste, the DOE has elected to petition the US EPA for a variance from the Land Disposal Restrictions of RCRA. This document fulfills the reporting requirements for the petition. This report is volume 4 of the petition which presents details about the transport characteristics across drum filter vents and polymer bags; gas generation reactions and rates during long-term WIPP operation; and geological characterization of the WIPP site.

NONE

1995-05-31T23:59:59.000Z

Note: This page contains sample records for the topic "variance stratum stratum3" 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

Major questions about derivation of variance-covariance information for nuclear data evaluations  

SciTech Connect

The uncertainties in and correlations among some evaluated nuclear data are now evaluated to permit estimation of data-related uncertainties in the outputs of neutronic calculations and to focus data improvement efforts. Questions are discussed that arise in trying to obtain adequate numerical files of variance-covariance uncertainty information. These involve (1) discrepant data, (2) experimental data with incompletely reported uncertainties, (3) uncertainties in nuclear model results, (4) uncertainty data for the resonance regions and for angle and energy distributions, and (5) the role of integral data in nuclear data evaluation. The question also arises whether files of uncertainty data designed for technological applications can suffice to represent past knowledge in an evaluation that includes new data. Directions are indicated toward resolving these questions.

Peelle, R.W.

1982-01-01T23:59:59.000Z

82

Variance Analysis of Wind and Natural Gas Generation under Different Market Structures: Some Observations  

DOE Green Energy (OSTI)

Does large scale penetration of renewable generation such as wind and solar power pose economic and operational burdens on the electricity system? A number of studies have pointed to the potential benefits of renewable generation as a hedge against the volatility and potential escalation of fossil fuel prices. Research also suggests that the lack of correlation of renewable energy costs with fossil fuel prices means that adding large amounts of wind or solar generation may also reduce the volatility of system-wide electricity costs. Such variance reduction of system costs may be of significant value to consumers due to risk aversion. The analysis in this report recognizes that the potential value of risk mitigation associated with wind generation and natural gas generation may depend on whether one considers the consumer's perspective or the investor's perspective and whether the market is regulated or deregulated. We analyze the risk and return trade-offs for wind and natural gas generation for deregulated markets based on hourly prices and load over a 10-year period using historical data in the PJM Interconnection (PJM) from 1999 to 2008. Similar analysis is then simulated and evaluated for regulated markets under certain assumptions.

Bush, B.; Jenkin, T.; Lipowicz, D.; Arent, D. J.; Cooke, R.

2012-01-01T23:59:59.000Z

83

A D-optimal design approach to constrained multiresponse robust design with prioritized mean and variance considerations  

Science Conference Proceedings (OSTI)

The traditional measures of ensuring quality, derived from viewing quality as simply conforming to specifications, does not adequately address today's global markets and value-driven customers. Consequently, process improvement projects are often performed ... Keywords: D-optimal design, Experimental restrictions and constraints, Mean and variance, Multiresponse robust design problems, Nonlinear goal programming, Optimal experimental designs

Jami Kovach; Byung Rae Cho

2009-08-01T23:59:59.000Z

84

A data variance technique for automated despiking of magnetotelluric data with a remote reference  

Science Conference Proceedings (OSTI)

The magnetotelluric method employs co-located surface measurements of electric and magnetic fields to infer the local electrical structure of the earth. The frequency-dependent 'apparent resistivity' curves can be inaccurate at long periods if input data are contaminated - even when robust remote reference techniques are employed. Data despiking prior to processing can result in significantly more reliable estimates of long period apparent resistivities. This paper outlines a two-step method of automatic identification and replacement for spike-like contamination of magnetotelluric data; based on the simultaneity of natural electric and magnetic field variations at distant sites. This simultaneity is exploited both to identify windows in time when the array data are compromised, and to generate synthetic data that replace observed transient noise spikes. In the first step, windows in data time series containing spikes are identified via intersite comparison of channel 'activity' - such as the variance of differenced data within each window. In the second step, plausible data for replacement of flagged windows is calculated by Wiener filtering coincident data in clean channels. The Wiener filters - which express the time-domain relationship between various array channels - are computed using an uncontaminated segment of array training data. Examples are shown where the algorithm is applied to artificially contaminated data, and to real field data. In both cases all spikes are successfully identified. In the case of implanted artificial noise, the synthetic replacement time series are very similar to the original recording. In all cases, apparent resistivity and phase curves obtained by processing the despiked data are much improved over curves obtained from raw data.

Kappler, K.

2011-02-15T23:59:59.000Z

85

Fast patient-specific Monte Carlo brachytherapy dose calculations via the correlated sampling variance reduction technique  

Science Conference Proceedings (OSTI)

Purpose: To demonstrate potential of correlated sampling Monte Carlo (CMC) simulation to improve the calculation efficiency for permanent seed brachytherapy (PSB) implants without loss of accuracy. Methods: CMC was implemented within an in-house MC code family (PTRAN) and used to compute 3D dose distributions for two patient cases: a clinical PSB postimplant prostate CT imaging study and a simulated post lumpectomy breast PSB implant planned on a screening dedicated breast cone-beam CT patient exam. CMC tallies the dose difference, {Delta}D, between highly correlated histories in homogeneous and heterogeneous geometries. The heterogeneous geometry histories were derived from photon collisions sampled in a geometrically identical but purely homogeneous medium geometry, by altering their particle weights to correct for bias. The prostate case consisted of 78 Model-6711 {sup 125}I seeds. The breast case consisted of 87 Model-200 {sup 103}Pd seeds embedded around a simulated lumpectomy cavity. Systematic and random errors in CMC were unfolded using low-uncertainty uncorrelated MC (UMC) as the benchmark. CMC efficiency gains, relative to UMC, were computed for all voxels, and the mean was classified in regions that received minimum doses greater than 20%, 50%, and 90% of D{sub 90}, as well as for various anatomical regions. Results: Systematic errors in CMC relative to UMC were less than 0.6% for 99% of the voxels and 0.04% for 100% of the voxels for the prostate and breast cases, respectively. For a 1 x 1 x 1 mm{sup 3} dose grid, efficiency gains were realized in all structures with 38.1- and 59.8-fold average gains within the prostate and breast clinical target volumes (CTVs), respectively. Greater than 99% of the voxels within the prostate and breast CTVs experienced an efficiency gain. Additionally, it was shown that efficiency losses were confined to low dose regions while the largest gains were located where little difference exists between the homogeneous and heterogeneous doses. On an AMD 1090T processor, computing times of 38 and 21 sec were required to achieve an average statistical uncertainty of 2% within the prostate (1 x 1 x 1 mm{sup 3}) and breast (0.67 x 0.67 x 0.8 mm{sup 3}) CTVs, respectively. Conclusions: CMC supports an additional average 38-60 fold improvement in average efficiency relative to conventional uncorrelated MC techniques, although some voxels experience no gain or even efficiency losses. However, for the two investigated case studies, the maximum variance within clinically significant structures was always reduced (on average by a factor of 6) in the therapeutic dose range generally. CMC takes only seconds to produce an accurate, high-resolution, low-uncertainly dose distribution for the low-energy PSB implants investigated in this study.

Sampson, Andrew; Le Yi; Williamson, Jeffrey F. [Department of Radiation Oncology, Virginia Commonwealth University, Richmond, Virginia 23298 (United States)

2012-02-15T23:59:59.000Z

86

ARE THERE ECHOES FROM THE PRE-BIG-BANG UNIVERSE? A SEARCH FOR LOW-VARIANCE CIRCLES IN THE COSMIC MICROWAVE BACKGROUND SKY  

SciTech Connect

In a recent analysis of Wilkinson Microwave Anisotropy Probe (WMAP) seven-year temperature maps, Gurzadyan and Penrose claim to find concentric circular patterns in the sky with anomalously low variances. These circles are presented as observational evidence for violent processes in a universe preceding our big bang as predicted by Penrose's Conformal Cyclic Cosmology. We reassess the statistical significance of the detection of the claimed concentric low-variance circles by comparing the WMAP data with Monte Carlo simulations of the cosmic microwave background (CMB) sky plus realistic modeling of WMAP's anisotropic noise. We find no anomaly in the variances compared with the {Lambda}CDM cosmological model. The observed variances in the data are consistent with a Gaussian CMB sky as predicted by the inflationary cosmology model at better than 3{sigma}.

Hajian, Amir, E-mail: ahajian@cita.utoronto.ca [Canadian Institute for Theoretical Astrophysics, University of Toronto, Toronto, ON M5S 3H8 (Canada)

2011-10-20T23:59:59.000Z

87

Occupational Medicine Variance Request  

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

it may not add value for a subcontractor medical provider to "review medical emergency response procedures included in site emergency and disaster preparedness plans." (Appendix...

88

Volatility and Variance  

Science Conference Proceedings (OSTI)

This report is the culmination of an inquiry into the behavior of energy prices, starting at least as far back as 1992 with passage of the Energy Policy Act and development of a relatively vibrant wholesale electricity market. Prior to about 1997, the volume of literature on energy price modeling was scarce. Many of the insights presented here were learned via trial and error or by painstakingly pondering a seemingly incongruous result. This report attempts to present a distilled and clear summary of the...

2006-11-08T23:59:59.000Z

89

Parameterization of the Two-Point Velocity Correlation Function in a Two-Particle Lagrangian Stochastic Model and Its Effect on the Prediction of Concentration Variances due to a Line Source  

Science Conference Proceedings (OSTI)

A Lagrangian stochastic model, in which a new parameterization of the two-point velocity correlation function is included, is investigated. Model simulations of temperature variances caused by a line source in an inhomogeneous wind-tunnel ...

J. E. Cohen; A. M. Reynolds

2000-10-01T23:59:59.000Z

90

GalaxyCount: a JAVA calculator of galaxy counts and variances in multiband wide-field surveys to 28 AB mag  

E-Print Network (OSTI)

We provide a consistent framework for estimating galaxy counts and variances in wide-field images for a range of photometric bands. The variances include both Poissonian noise and variations due to large scale structure. We demonstrate that our statistical theory is consistent with the counts in the deepest multiband surveys available. The statistical estimates depend on several observational parameters (e.g. seeing, signal to noise ratio), and include a sophisticated treatment of detection completeness. The JAVA calculator is freely available and offers the user the option to adopt our consistent framework or a different scheme. We also provide a summary table of statistical measures in the different bands for a range of different fields of view. Reliable estimation of the background counts has profound consequences in many areas of observational astronomy. We provide two such examples. One is from a recent study of the Sculptor galaxy NGC 300 where stellar photometry has been used to demonstrate that the outer disc extends to 10 effective radii, far beyond what was thought possible for a normal low-luminosity spiral. We confirm this finding by a reanalysis of the background counts. Secondly, we determine the luminosity function of the galaxy cluster Abell 2734, both through spectroscopically determined cluster membership, and through statistical subtraction of the background galaxies using the calculator and offset fields. We demonstrate very good agreement, suggesting that expensive spectroscopic follow-up, or off-source observations, may often be bypassed via determination of the galaxy background with GalaxyCount.

S. C. Ellis; J. Bland-Hawthorn

2006-02-27T23:59:59.000Z

91

The importance of parameter variances, correlations lengths, and cross-correlations in reactive transport models: key considerations for assessing the need for microscale information  

SciTech Connect

A process-oriented modeling approach is implemented to examine the importance of parameter variances, correlation lengths, and especially cross-correlations in contaminant transport predictions over large scales. It is shown that the most important consideration is the correlation between flow rates and retardation processes (e.g., sorption, matrix diffusion) in the system. lf flow rates are negatively correlated with retardation factors in systems containing multiple flow pathways, then characterizing these negative correlation(s) may have more impact on reactive transport modeling than microscale information. Such negative correlations are expected in porous-media systems where permeability is negatively correlated with clay content and rock alteration (which are usually associated with increased sorption). Likewise, negative correlations are expected in fractured rocks where permeability is positively correlated with fracture apertures, which in turn are negatively correlated with sorption and matrix diffusion. Parameter variances and correlation lengths are also shown to have important effects on reactive transport predictions, but they are less important than parameter cross-correlations. Microscale information pertaining to contaminant transport has become more readily available as characterization methods and spectroscopic instrumentation have achieved lower detection limits, greater resolution, and better precision. Obtaining detailed mechanistic insights into contaminant-rock-water interactions is becoming a routine practice in characterizing reactive transport processes in groundwater systems (almost necessary for high-profile publications). Unfortunately, a quantitative link between microscale information and flow and transport parameter distributions or cross-correlations has not yet been established. One reason for this is that quantitative microscale information is difficult to obtain in complex, heterogeneous systems. So simple systems that lack the complexity and heterogeneity of real aquifer materials are often studied. Another is that instrumentation used to obtain microscale information often probes only one variable or family of variables at a time, so linkages to other variables must be inferred by indirect means from other lines of evidence. Despite these limitations, microscale information can be useful in the development and validation of reactive transport models. For example, knowledge of mineral phases that have strong affinities for contaminants can help in the development of cross-correlations between flow and sorption parameters via characterization of permeability and mineral distributions in aquifers. Likewise, microscale information on pore structures in low-permeability zones and contaminant penetration distances into these zones from higher-permeability zones (e.g., fractures) can provide valuable constraints on the representation of diffusive mass transfer processes between flowing porosity and secondary porosity. The prioritization of obtaining microscale information in any groundwater system can be informed by modeling exercises such as those conducted for this study.

Reimus, Paul W [Los Alamos National Laboratory

2010-12-08T23:59:59.000Z

92

The Modified Allan Variance as Time-Domain Analysis Tool for Estimating the Hurst Parameter of Long-Range Dependent Traffic  

E-Print Network (OSTI)

Abstract ? Experimental measurements show that Internet traffic exhibits self-similarity and long-range dependence (LRD). A delicate issue is the estimation of traffic statistical quantities that characterize self-similarity and LRD, such as the Hurst parameter H. In this paper, we propose to use the Modified Allan Variance (MAVAR), a well-known time-domain tool originally studied for frequency stability characterization, for estimating the power-law spectrum and thus the H parameter of LRD traffic time series. This novel method is validated by comparison to one of the most widely adopted algorithms for analyzing LRD traffic: the log-scale diagram technique based on wavelet analysis. Both methods are applied to pseudo-random data series, generated with known values of H. MAVAR exhibits outstanding accuracy in estimating H, better than the classical log-scale method. Finally, both techniques are applied to a real IP traffic trace, providing a further example of the capabilities of MAVAR. Index Terms ? Fractals, fractional noise, Internet, long-range dependence, self-similarity, traffic control (communication). Work partialy supported by Ministero dell’Istruzione, dell’Università e della Ricerca (MIUR), Italy, under FIRB project TANGO. I.

Stefano Bregni; Senior Member; Luca Primerano

2004-01-01T23:59:59.000Z

93

Variance of the Hydrostatically Integrated Height  

Science Conference Proceedings (OSTI)

In radiosonde applications the sonde height is required for assignment of winds and meteorological parameters. Usually, this height is obtained using the classical hydrostatic integration involving measurements of pressure (P) and virtual ...

Ranjit M. Passi; Vincent E. Lally

1988-11-01T23:59:59.000Z

94

Efficient Cardinality/Mean-Variance Portfolios  

E-Print Network (OSTI)

Mar 2, 2012 ... maximizes the expected utility for each investor is a challenging and arduous ... rate transaction costs, such as to bound the turnover, which ...

95

Lagrangean Decomposition for Mean-Variance Combinatorial ...  

E-Print Network (OSTI)

potential cost vectors is given and aim at minimizing the value of a solution in its worst ... Ministry of Economics and Technology within the 6th Energy Research ... problem can be solved in polynomial time, as shown by Nikolova [4], who also.

96

The minimum-variance theory revisited  

Science Conference Proceedings (OSTI)

In this paper, we show how the diffusion of the Nitric Oxide retrograde neuromessenger (NO) in the neural tissue produces Diffusive Hybrid Neuromodulation (DHN), as well as positively influencing the learning process in the artificial and biological ...

Jianfeng Feng

2003-06-01T23:59:59.000Z

97

 

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

File 11: District Steam and Hot Water File 11: District Steam and Hot Water (CBECS89.A11) Ques- tion- naire Variable Variable Variable Variable item Description Name Position Format CASEID Building identifier BLDGID4 1- 5 Census region REGION4 7- 7 $REGION. Census division CENDIV4 9- 9 $CENDIV. B2 Square footage SQFTC4 11- 12 $SQFTC. Principal building activity PBA4 14- 15 $ACTIVTY. F3 Year construction was completed YRCONC4 17- 18 $YRCONC. Adjusted weight ADJWT4 20- 27 Variance stratum STRATUM4 29- 30

98

 

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

File 12: District Chilled Water File 12: District Chilled Water (CBECS89.A12) Ques- tion- naire Variable Variable Variable Variable item Description Name Position Format CASEID Building identifier BLDGID4 1- 5 Census region REGION4 7- 7 $REGION. Census division CENDIV4 9- 9 $CENDIV. B2 Square footage SQFTC4 11- 12 $SQFTC. Principal building activity PBA4 14- 15 $ACTIVTY. F3 Year construction was completed YRCONC4 17- 18 $YRCONC. Adjusted weight ADJWT4 20- 27 Variance stratum STRATUM4 29- 30

99

Sequential State and Variance Estimation within the Ensemble Kalman Filter  

Science Conference Proceedings (OSTI)

Kalman filter methods for real-time assimilation of observations and dynamical systems typically assume knowledge of the system parameters. However, relatively little work has been done on extending state estimation procedures to include ...

Jonathan R. Stroud; Thomas Bengtsson

2007-09-01T23:59:59.000Z

100

Optimal Longitudinal Cohort Designs and Variance Parameter Estimation  

E-Print Network (OSTI)

1] Atkinson, A.C. and Donev, A.N. (1992). Optimumby the ratio (Atkinson and Donev, 1992 [1]): D -Eff( ? 2 | ?

Gan, Lu

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "variance stratum stratum3" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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to obtain the most current and comprehensive results.


101

Global Gravity Wave Variances from Aura MLS: Characteristics and Interpretation  

Science Conference Proceedings (OSTI)

The gravity wave (GW)–resolving capabilities of 118-GHz saturated thermal radiances acquired throughout the stratosphere by the Microwave Limb Sounder (MLS) on the Aura satellite are investigated and initial results presented. Because the ...

Dong L. Wu; Stephen D. Eckermann

2008-12-01T23:59:59.000Z

102

Automated Variance Reduction Applied to Nuclear Well-Logging Problems  

Science Conference Proceedings (OSTI)

MC Calculations / Special Issue on the 11th International Conference on Radiation Shielding and the 15th Topical Meeting of the Radiation Protection and Shielding Division (PART 3) / Radiation Protection

John C. Wagner; Douglas E. Peplow; Thomas M. Evans

103

Gender variance on campus : a critical analysis of transgender voices  

E-Print Network (OSTI)

transgendered, transexual, and gender-variant clients.J. (1987). Postmodernism and gender relations in feministL. A. (2001). Sex versus gender. National NOW Times, 33(3),

Mintz, Lee M.

2011-01-01T23:59:59.000Z

104

LIFE EXTENDING CONTROL BY A VARIANCE CONSTRAINED MPC APPROACH  

E-Print Network (OSTI)

Steam to turbine Attemperator Spray Flow Fig. 1. The operating process schematic diagram of the utility superheaters is an attemperator which regulates the temperature of the steam exiting the secondary superheater (kg/s), fuel flow (kg/s), attemperator spray flow (kg/s) and air flow (kg/s) and three controlled

Marquez, Horacio J.

105

A MEAN-VARIANCE PORTFOLIO OPTIMIZATION OF CALIFORNIA'S  

E-Print Network (OSTI)

.............................................................................. 26 Figure 7. Biogas collection lines connected to the main header on the west 6acre cell: Landfill gas, biogas, biodegradation, bioreactor landfills, methane, bioreactor cells xiii #12;xiv #12 of oxygen (anaerobically), it produces landfill gas (biogas). Biogas is primarily a mixture of methane (CH4

106

Low-Frequency Signals in Midtropospheric Submonthly Temperature Variance  

Science Conference Proceedings (OSTI)

Low-frequency signals in the daily variability of temperature in the midtroposphere are investigated, thereby complementing published studies of changes in day-to-day temperature variability and in extreme weather events at the surface. The ...

Haig Iskenderian; Richard D. Rosen

2000-07-01T23:59:59.000Z

107

Generalised Mean-Variance Analysis and Robust Portfolio Diversification  

E-Print Network (OSTI)

GLIIHUHQW VWRFNV FRXOG EH ILUVW VKRXOG DGG WR #20;#17; /LNHZLVH WKH #21; QG URZ LV WKH VXP RI SUREDELOLWLHV WKDW GLIIHUHQW VWRFNV FRXOG EH VHFRQG#15; ZKLFK DJDLQ DGGV WR #20;#17; 7KH FROXPQ QXPEHUV#15; VD\\ WKH VHFRQG FROXPQ#15; &9%#15; WHOOV XV WKH UDQN...

Wright, Stephen M; Satchell, Stephen E

2004-06-16T23:59:59.000Z

108

Optimizing inventory levels using financial, lifecycle and forecast variance data  

E-Print Network (OSTI)

Significant inventory write-offs have recently plagued ATI Technologies, a world leader in graphics and media processors. ATI's product-centric culture has long deterred attention from supply chain efficiency. Given that ...

Hwang, Irene S

2007-01-01T23:59:59.000Z

109

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

110

Gaguk Zakaria received his Stratum One (Bachelor of Science) degree in Electrical Engineering in 1985 from Bandung Institute of Technology, Bandung, Indonesia, and his  

E-Print Network (OSTI)

Engineering in 1985 from Bandung Institute of Technology, Bandung, Indonesia, and his Master of Science degree

Beex, A. A. "Louis"

111

Iron-Carbon Phase Diagram: A Century at Variance with Chemical ...  

Science Conference Proceedings (OSTI)

Abstract Scope, For about a century thermodynamically absurd facts have been propagated in conjunction with the iron-carbon phase diagram. These facts ...

112

Robust variance control for systems with finite-signal-to-noise uncertainty  

Science Conference Proceedings (OSTI)

This paper develops control analysis and synthesis techniques for systems with finite signal-to-noise-ratios (called the finite-signal-to-noise (FSN) models). The system is characterized by an easily computed measure @f. The control synthesis finds output ... Keywords: Optimal control, Robust control, Robust performance, Signal-to-noise ratio

Jianbo Lu; Robert E. Skelton

2000-04-01T23:59:59.000Z

113

Is Real-Time Pricing Green?: The Environmental Impacts of Electricity Demand Variance  

E-Print Network (OSTI)

Gas Hydro Nuclear Oil Notes: a) Source: EPA eGRID for 2000 (www.epa.gov/cleanenergy/egrid/index.htm). b) Shares are ofNotes: a) Source: EPA eGRID for 2000 (http://www.epa.gov/

Holland, Stephen P.; Mansur, Erin T.

2004-01-01T23:59:59.000Z

114

Is Real-Time Pricing Green?: The Environmental Impacts of Electricity Demand Variance  

E-Print Network (OSTI)

re?ects time-varying production costs. In particular, real-re?ects time-varying production costs. 1 In particular, theyhour variation in production costs. An environmental group

Holland, Stephen P.; Mansur, Erin T.

2004-01-01T23:59:59.000Z

115

Is Real-Time Pricing Green?: The Environmental Impacts of Electricity Demand Variance  

E-Print Network (OSTI)

L) of demand. Oil Marginal Cost ($/MWh) Hydroelectricsince oil and gas have high marginal costs, their shares ofcost, fuel sources are gen- erally ordered hydroelectric, nuclear, coal, natural gas, and oil.

Holland, Stephen P.; Mansur, Erin T.

2004-01-01T23:59:59.000Z

116

Variance Decomposition Sensitivity Analysis of a Passive Residual Heat Removal System Model  

E-Print Network (OSTI)

Temperature Gas-Cooled Reactor ­ Pebble Bed Modular (HTR-PM). 1. Introduction Generation IV nuclear reactor with an application to a gas-cooled reactor", Nuclear Engineering and Design, 238(1), pp.217-228. McKay, M. D., 1996 of Nuclear and New Energy technology, Tsinghua University, Beijing, China b Department of Energy, Polytechnic

117

Turbulent Heat Flux and Temperature Variance Dissipation Rate in Natural Convection in Lead-Bismuth  

Science Conference Proceedings (OSTI)

Technical Paper / Mathematics and Computation, Supercomputing, Reactor Physics and Nuclear and Biological Applications

I. Otic; G. Grötzbach

118

Is Real-Time Pricing Green?: The Environmental Impacts of Electricity Demand Variance  

E-Print Network (OSTI)

production costs of hydroelectricity are typically low) bute?ects likely driven by hydroelectricity availability. Thus,demand for peak-shaving hydroelectricity. Finally, the four

Holland, Stephen P.; Mansur, Erin T.

2004-01-01T23:59:59.000Z

119

Profiles of Wind Speed Variances within Nocturnal Low-Level Jets Observed with a Sodar  

Science Conference Proceedings (OSTI)

Continuous sodar measurements of wind profiles have been carried out at the Zvenigorod Scientific Station of the Obukhov Institute of Atmospheric Physics since 2008. The station is located in a slightly inhomogeneous rural area about 45 km west of ...

Margarita A. Kallistratova; Rostislav D. Kouznetsov; Valerii F. Kramar; Dmitrii D. Kuznetsov

120

Is Real-Time Pricing Green?: The Environmental Impacts of Electricity Demand Variance  

E-Print Network (OSTI)

Coal Natural Gas and Oil Nuclear Quantity Supplied (MWh)natural gas, and oil. In this market, when quantity supplied

Holland, Stephen P.; Mansur, Erin T.

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "variance stratum stratum3" 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

Is Real-Time Pricing Green?: The Environmental Impacts of Electricity Demand Variance  

E-Print Network (OSTI)

Atlantic region, where the PJM wholesale electricity marketoperates. Firms in PJM use a mix of fuel sources andof the fossil fuel sources in PJM. The fossil-?red units are

Holland, Stephen P.; Mansur, Erin T.

2004-01-01T23:59:59.000Z

122

Is Real-Time Pricing Green?: The Environmental Impacts of Electricity Demand Variance  

E-Print Network (OSTI)

in regions with more hydroelectric capacity than oil-?redoil ?red rather than hydroelectric. Holland: Department ofgen- erally ordered hydroelectric, nuclear, coal, natural

Holland, Stephen P.; Mansur, Erin T.

2004-01-01T23:59:59.000Z

123

Is Real-Time Pricing Green?: The Environmental Impacts of Electricity Demand Variance  

E-Print Network (OSTI)

Gas Hydro Nuclear Oil Notes: a) Source: EPA eGRID for 2000 (Fossil fuel sources are coal, natural gas, and oil. Non-sources are gen- erally ordered hydroelectric, nuclear, coal, natural gas, and oil.

Holland, Stephen P.; Mansur, Erin T.

2004-01-01T23:59:59.000Z

124

Variance of the Output in a Deterministic TwoMachine Line  

E-Print Network (OSTI)

Contractors President: Nels Overgaard Outstanding Member: Josh Miltenberger Josh has been an excellent vice

Gershwin, Stanley B.

125

A multiple filter test for change point detection in renewal processes with varying variance  

E-Print Network (OSTI)

, the algorithm successively searches for extreme values of the filtered derivative, similar to the techniques of in the interval (a, b] (0, T]. For each point t h we compare the number of events Nle := N(t-h,t]() and Nri := N(t,t+h]() in the left and right window (Figure 4 A). 0 h t-h t t+h T - h T h ( ] Nle ( ] Nri A T = 700 h = 75 -2 0 Gh

Neininger, Ralph

126

The Production and Dissipation of Compensated Thermohaline Variance by Mesoscale Stirring  

Science Conference Proceedings (OSTI)

Temperature–salinity profiles from the region studied in the North Atlantic Tracer Release Experiment (NATRE) show large isopycnal excursions at depths just below the thermocline. It is proposed here that these thermohaline filaments result from ...

K. Shafer Smith; Raffaele Ferrari

2009-10-01T23:59:59.000Z

127

No-migration variance petition. Appendices C--J: Volume 5, Revision 1  

SciTech Connect

Volume V contains the appendices for: closure and post-closure plans; RCRA ground water monitoring waver; Waste Isolation Division Quality Program Manual; water quality sampling plan; WIPP Environmental Procedures Manual; sample handling and laboratory procedures; data analysis; and Annual Site Environmental Monitoring Report for the Waste Isolation Pilot Plant.

Not Available

1990-03-01T23:59:59.000Z

128

Identifying Periodic Components in Atmospheric Data Using a Family of Minimum Variance Spectral Estimators  

Science Conference Proceedings (OSTI)

This work describes the application of a recently developed signal processing technique for identifying periodic components in the presence of unknown colored noise. Specifically, the application of this technique to the identification of ...

Christopher K. Wikle; Peter J. Sherman; Tsing-Chang Chen

1995-10-01T23:59:59.000Z

129

Surface Eddy Momentum Flux and Velocity Variances in the Southern Ocean from Geosat Altimetry  

Science Conference Proceedings (OSTI)

Satellite altimetry has previously been used to map the magnitude of the surface eddy variability of the global oceans, but the direction of the time-variable velocities have been more difficult to determine. Here, a technique is presented for ...

Rosemary Morrow; Richard Coleman; John Church; Dudley Chelton

1994-10-01T23:59:59.000Z

130

Is Real-Time Pricing Green?: The Environmental Impacts of Electricity Demand Variance  

E-Print Network (OSTI)

for responding to real-time prices. 3 Recently someof RTP. the higher real-time price, each would use lessretail price, p . For real-time prices below the ?at price,

Holland, Stephen P.; Mansur, Erin T.

2004-01-01T23:59:59.000Z

131

No-migration variance petition. Appendices A--B: Volume 2, Revision 1  

Science Conference Proceedings (OSTI)

Volume II contains Appendix A, emergency plan and Appendix B, waste analysis plan. The Waste Isolation Pilot Plant (WIPP) Emergency plan and Procedures (WP 12-9, Rev. 5, 1989) provides an organized plan of action for dealing with emergencies at the WIPP. A contingency plan is included which is in compliance with 40 CFR Part 265, Subpart D. The waste analysis plan provides a description of the chemical and physical characteristics of the wastes to be emplaced in the WIPP underground facility. A detailed discussion of the WIPP Waste Acceptance Criteria and the rationale for its established units are also included.

Not Available

1990-03-01T23:59:59.000Z

132

A Test for Inhomogeneous Variance in Time-averaged Temperature Data  

Science Conference Proceedings (OSTI)

Many climatic applications, including detection of climate change, require temperature time series that are free from discontinuities introduced by nonclimatic events such as relocation of weather stations. Although much attention has been ...

Mary W. Downton; Richard W. Katz

1993-12-01T23:59:59.000Z

133

Variance and Predictability of Precipitation at Seasonal-to-Interannual Timescales  

Science Conference Proceedings (OSTI)

A series of atmospheric general circulation model simulations, spanning a total of several thousand years, is used to assess the impact of land surface and ocean boundary conditions on the seasonal-to-interannual variability and predictability of ...

Randal D. Koster; Max J. Suarez; Mark Heiser

2000-02-01T23:59:59.000Z

134

Determining manufacturing parameters to suppress system variance using linear and non-linear models  

Science Conference Proceedings (OSTI)

Determining manufacturing parameters for a new product is fundamentally a difficult problem, because there has little suggestion information. There are several researches on this topic, and most of them focus on single specific model or the engineer's ... Keywords: Engineering problem, Manufacturing, TFT-LCD

Der-Chiang Li; Wen-Chih Chen; Chiao-Wen Liu; Che-Jung Chang; Chien-Chih Chen

2012-03-01T23:59:59.000Z

135

Is Real-Time Pricing Green?: The Environmental Impacts of Electricity Demand Variance  

E-Print Network (OSTI)

index.htm). b) Peak includes oil, gas, and hydroelectric. Pdemand, but only if peak capacity is oil ?red rather thandemand, but only if peak capacity is oil ?red rather than

Holland, Stephen P.; Mansur, Erin T.

2004-01-01T23:59:59.000Z

136

Comparison of Thermal Variance Dissipation Rates from Moored and Profiling Instruments at the Equator  

Science Conference Proceedings (OSTI)

As a quantitative test of moored mixing measurements using ?pods, a comparison experiment was conducted at 0°, 140°W in October–November 2008. The following three measurement elements were involved: (i) NOAA’s Tropical Atmosphere Ocean (TAO) ...

A. Perlin; J. N. Moum

2012-09-01T23:59:59.000Z

137

6-Hour to 1-Year Variance of Five Global Precipitation Sets  

Science Conference Proceedings (OSTI)

Three-hourly time series of precipitation from three high-resolution precipitation products [Tropical Rainfall Measuring Mission (TRMM) algorithm 3B-42, the Climate Prediction Center’s morphing method (CMORPH), and the Precipitation Estimation ...

Alex C. Ruane; John O. Roads

2007-08-01T23:59:59.000Z

138

The Impact of Sampling Methods on Bias and Variance in Stochastic ...  

E-Print Network (OSTI)

investigate how two alternative sampling methods, antithetic variates and Latin Hypercube ...... Department of Energy, under grant DE-FG02-05ER25694.

139

No-migration variance petition. Volume 3, Revision 1: Appendix B, Attachments A through D  

Science Conference Proceedings (OSTI)

Volume III contains the following attachments: TRUPACT-II content codes (TRUCON); TRUPACT-II chemical list; chemical compatibility analysis for Rocky Flats Plant waste forms (Appendix 2.10.12 of TRUPACT-II safety analysis report); and chemical compatibility analyses for waste forms across all sites.

Not Available

1990-03-01T23:59:59.000Z

140

INTRINSIC VARIANCE LOWER BOUND (IVLB): AN EXTENSION OF THE CRAM ER-RAO BOUND TO RIEMANNIAN MANIFOLDS  

E-Print Network (OSTI)

MANIFOLDS Jo~ao Xavier and Victor Barroso Instituto Superior T´ecnico ­ Instituto de Sistemas e Rob´otica Av Analysis. 2nd ed. Springer-Verlag. [7] S. Gallot, D. Hulin, and J. Lafontaine. Riemannian Geome- try, 2nd

Note: This page contains sample records for the topic "variance stratum stratum3" 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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141

Bringing it all to the table : examining variance in strategic approaches within the six-party talk  

E-Print Network (OSTI)

In the approaches seen at the six-party talks on North Korea's nuclear program, why did states faced with the same security problem adopt different strategies? Answering this question will bring understanding to why the ...

Zahorchak, Jason M

2009-01-01T23:59:59.000Z

142

Analysis of variance of three contrast functions in a genetic algorithm for non-linear blind source separation  

Science Conference Proceedings (OSTI)

The task of recovering a set of unknown sources from another set of mixtures directly observable and little more information about the way they were mixed is called the blind source separation problem. If the assumption in order to obtain the original ...

F. Rojas; J. M. Górriz; O. Valenzuela

2005-06-01T23:59:59.000Z

143

Short-term Changes in the Variance In artificial selection experiments it seems likely that the effects of  

E-Print Network (OSTI)

with the macroenvironments. The reader is referred to my heritability article, Critical Reviews in Plant Sciences 10 effects within a family by the macroenvironment terms, locations, years, location

Walsh, Bruce

144

Spectral Subtraction with Variance Reduced Noise Spectrum Estimates Kamil K. Wojcicki, Benjamin J. Shannon and Kuldip K. Paliwal  

E-Print Network (OSTI)

. IEEE Intern. Conf. on Acoustics, Speech and Signal Processing (ICASSP'79), Washington, DC, USA, pp. 208 findings which suggest that estimation of the phase spectrum using low dynamic range analysis windows (at 20­40ms window durations) is beneficial for speech enhancement. Using an objective speech quality

145

Horizontal-Velocity and Variance Measurements in the Stable Boundary Layer Using Doppler Lidar: Sensitivity to Averaging Procedures  

Science Conference Proceedings (OSTI)

Quantitative data on turbulence variables aloft—above the region of the atmosphere conveniently measured from towers—have been an important but difficult measurement need for advancing understanding and modeling of the stable boundary layer (SBL)...

Yelena L. Pichugina; Sara C. Tucker; Robert M. Banta; W. Alan Brewer; Neil D. Kelley; Bonnie J. Jonkman; Rob K. Newsom

2008-08-01T23:59:59.000Z

146

No-migration variance petition. Appendices K--O, Response to notice of deficiencies: Volume 6, Revision 1  

Science Conference Proceedings (OSTI)

This document reports data collected as part of the Ecological Monitoring Program (EMP) at the Waste Isolation Pilot Plant near Carlsbad, New Mexico, for Calendar Year 1987. Also included are data from the last quarter (October through December) of 1986. This report divides data collection activities into two parts. Part A covers general environmental monitoring which includes meteorology, aerial photography, air quality monitoring, water quality monitoring, and wildlife population surveillance. Part B focuses on the special studies being performed to evaluate the impacts of salt dispersal from the site on the surrounding ecosystem. The fourth year of salt impact monitoring was completed in 1987. These studies involve the monitoring of soil chemistry, soil microbiota, and vegetation in permanent study plots. None of the findings indicate that the WIPP project is adversely impacting environmental quality at the site. As in 1986, breeding bird censuses completed this year indicate changes in the local bird fauna associated with the WIPP site. The decline in small mammal populations noted in the 1986 census is still evident in the 1987 data; however, populations are showing signs of recovery. There is no indication that this decline is related to WIPP activities. Rather, the evidence indicates that natural population fluctuations may be common in this ecosystem. The salt impact studies continue to reveal some short-range transport of salt dust from the saltpiles. This material accumulates at or near the soil surface during the dry seasons in areas near the saltpiles, but is flushed deeper into the soil during the rainy season. Microbial activity does not appear to be affected by this salt importation. Vegetation coverage and density data from 1987 also do not show any detrimental effect associated with aerial dispersal of salt.

Fischer, N.T. [ed.] [International Technology Corp., Torrance, CA (United States)

1990-03-01T23:59:59.000Z

147

Assimilation of Stratospheric Chemical Tracer Observations Using a Kalman Filter. Part II: ?2-Validated Results and Analysis of Variance and Correlation Dynamics  

Science Conference Proceedings (OSTI)

A Kalman filter system designed for the assimilation of limb-sounding observations of stratospheric chemical tracers, which has four tunable covariance parameters, was developed in Part I of this two-part paper. The assimilation results of CH4 ...

Richard Ménard; Lang-Ping Chang

2000-08-01T23:59:59.000Z

148

Precipitation Identification from Radar Wind Profiler Spectral Moment Data: Vertical Velocity Histograms, Velocity Variance, and Signal Power–Vertical Velocity Correlations  

Science Conference Proceedings (OSTI)

Correlations between range-corrected signal power Src and radial vertical velocity Vr, from the vertical beam of a UHF wind profiler can be used to distinguish between air- and precipitation-dominated echoes using an Src–Vr correlation diagram. ...

F. Martin Ralph; Paul J. Neiman; Dominique Ruffieux

1996-06-01T23:59:59.000Z

149

Kansas | Department of Energy  

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

Underground Storage of Natural Gas (Kansas) Any natural gas public utility may appropriate for its use for the underground storage of natural gas any subsurface stratum or...

150

Manufacturing Consumption of Energy 1991  

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

establishments within a stratum would also be homogeneous with respect to the quantities, types, and shares of energy consumed as fuels and for nonfuel purposes. Also, the weight...

151

Assessing understorey structural characteristics in eucalypt forests: an investigation of LiDAR techniques.  

E-Print Network (OSTI)

??The potential of airborne LiDAR technology to quantify forest structure within eucalypt forests has been evaluated with a focus on the understorey stratum. To achieve… (more)

Goodwin, Nicholas R.

2006-01-01T23:59:59.000Z

152

Estimating the Accuracy of Polarimetric Radar–Based Retrievals of Drop-Size Distribution Parameters and Rain Rate: An Application of Error Variance Separation Using Radar-Derived Spatial Correlations  

Science Conference Proceedings (OSTI)

The accuracy of retrieving the two drop size distribution (DSD) parameters, median volume diameter (D0), and normalized intercept parameter (NW), as well as rain rate (R), from polarimetric C-band radar data obtained during a cool-season, long-...

M. Thurai; V. N. Bringi; L. D. Carey; P. Gatlin; E. Schultz; W. A. Petersen

2012-06-01T23:59:59.000Z

153

The cost of geothermal energy in the western US region:a portfolio-based approach a mean-variance portfolio optimization of the regions' generating mix to 2013.  

DOE Green Energy (OSTI)

Energy planning represents an investment-decision problem. Investors commonly evaluate such problems using portfolio theory to manage risk and maximize portfolio performance under a variety of unpredictable economic outcomes. Energy planners need to similarly abandon their reliance on traditional, ''least-cost'' stand-alone technology cost estimates and instead evaluate conventional and renewable energy sources on the basis of their portfolio cost--their cost contribution relative to their risk contribution to a mix of generating assets. This report describes essential portfolio-theory ideas and discusses their application in the Western US region. The memo illustrates how electricity-generating mixes can benefit from additional shares of geothermal and other renewables. Compared to fossil-dominated mixes, efficient portfolios reduce generating cost while including greater renewables shares in the mix. This enhances energy security. Though counter-intuitive, the idea that adding more costly geothermal can actually reduce portfolio-generating cost is consistent with basic finance theory. An important implication is that in dynamic and uncertain environments, the relative value of generating technologies must be determined not by evaluating alternative resources, but by evaluating alternative resource portfolios. The optimal results for the Western US Region indicate that compared to the EIA target mixes, there exist generating mixes with larger geothermal shares at equal-or-lower expected cost and risk.

Beurskens, Luuk (ECN-Energy Research Centre of the Netherland); Jansen, Jaap C. (ECN-Energy Research Centre of the Netherlands); Awerbuch, Shimon Ph.D. (.University of Sussex, Brighton, UK); Drennen, Thomas E.

2005-09-01T23:59:59.000Z

154

Method for in situ heating of hydrocarbonaceous formations  

DOE Patents (OSTI)

A method for extracting valuable constituents from underground hydrocarbonaceous deposits such as heavy crude tar sands and oil shale is disclosed. Initially, a stratum containing a rich deposit is hydraulically fractured to form a horizontally extending fracture plane. A conducting liquid and proppant is then injected into the fracture plane to form a conducting plane. Electrical excitations are then introduced into the stratum adjacent the conducting plate to retort the rich stratum along the conducting plane. The valuable constituents from the stratum adjacent the conducting plate are then recovered. Subsequently, the remainder of the deposit is also combustion retorted to further recover valuable constituents from the deposit. Various R.F. heating systems are also disclosed for use in the present invention.

Little, William E. (Morgantown, WV); McLendon, Thomas R. (Laramie, WY)

1987-01-01T23:59:59.000Z

155

Observed Temperature Effects on Hourly Residential Electric Load Reduction in Response to an Experimental Critical Peak Pricing Tariff  

E-Print Network (OSTI)

by building type and climate zone with the intent ofWe roughly describe the climate zones as Coast, Foothills,group A. Stratum B. SPP climate zone - description 1- Coast

Herter, Karen B.; McAuliffe, Patrick K.; Rosenfeld, Arthur H.

2005-01-01T23:59:59.000Z

156

Mechanistic investigation of skin barrier perturbation induced by surfactants in the presence of humectants  

E-Print Network (OSTI)

The stratum corneum (SC) of the skin functions as a barrier between the body and the environment. Surfactants such as Sodium Dodecyl Sulfate (SDS) are used in skin cleansers and in skin-care formulations because of their ...

Ghosh, Saswata

2007-01-01T23:59:59.000Z

157

Underground Storage of Natural Gas (Kansas)  

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

Any natural gas public utility may appropriate for its use for the underground storage of natural gas any subsurface stratum or formation in any land which the commission shall have found to be...

158

Life Cycle Regulation of Transportation Fuels: Uncertainty and its Policy Implications  

E-Print Network (OSTI)

81 Contribution to variance for corn ethanol, including80 Contribution to variance for corn ethanol . . . . . . .anhydrous corn ethanol . . . . . . . . . . . . . . 63 Range

Plevin, Richard Jay

2010-01-01T23:59:59.000Z

159

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

160

ARM - Publications: Science Team Meeting Documents  

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

vertical profiles of the vertical velocity variance and its third moment, cumulus kinetic energy, model prognostic variables' variances and fluxes, their budgets, as well as...

Note: This page contains sample records for the topic "variance stratum stratum3" 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

Life Cycle Regulation of Transportation Fuels: Uncertainty and its Policy Implications  

E-Print Network (OSTI)

52 Corn acres planted and harvested in81 Contribution to variance for corn ethanol, including80 Contribution to variance for corn ethanol . . . . . . .

Plevin, Richard Jay

2010-01-01T23:59:59.000Z

162

Simulating a Nationally Representative Housing Sample Using EnergyPlus  

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

variance in energy use between individual homes, regions, or other subsamples; using this tool, we can also evaluate how that variance affects the impacts of potential policies....

163

EVENT TREE ANALYSIS AT THE SAVANNAH RIVER SITE: A CASE HISTORY  

Science Conference Proceedings (OSTI)

At the Savannah River Site (SRS), a Department of Energy (DOE) installation in west-central South Carolina there is a unique geologic stratum that exists at depth that has the potential to cause surface settlement resulting from a seismic event. In the past the particular stratum in question has been remediated via pressure grouting, however the benefits of remediation have always been debatable. Recently the SRS has attempted to frame the issue in terms of risk via an event tree or logic tree analysis. This paper describes that analysis, including the input data required.

Williams, R

2009-05-25T23:59:59.000Z

164

A system for ubiquitous fall monitoring at home via a wireless sensor network and a wearable mote  

Science Conference Proceedings (OSTI)

Accidental falls of our elderly, and physical injuries resulting, represent a major health and economic problem. Falls are the most common cause of serious injuries and are a major health threat in the stratum of older population. Early detection of ... Keywords: Accelerometer, Activities of daily living, Fall detection, Falls in the elderly, Wireless sensor network

Roberto Paoli; Francisco J. Fernández-Luque; Ginés Doménech; Félix Martínez; Juan Zapata; Ramón Ruiz

2012-04-01T23:59:59.000Z

165

Society of Petroleum Engineers Oil Deposits in Diatomites: A New Challenge for Subterranean Mechanics  

E-Print Network (OSTI)

primary in a Lost Hills well dramatically increases after several months. There was no water injection at the injection wells after the hydrofracture, so that at the well, condition = 1 should be satisfied. The most. Each injection well occupies a certain vol- ume (area in 2D) of the stratum. Due to water injection

Patzek, Tadeusz W.

166

Mining subsidence prediction based on 3D stratigraphic model and visualization  

Science Conference Proceedings (OSTI)

3D phenomenon involved in mining subsidence was Classified, summarized and aggregated, established the hierarchical structure that describing the geologic phenomena and engineering phenomena of stratum structure. Proposed a 3D stratigraphic model that ... Keywords: 3D stratigraphic model, 3D visualization, DEMs-TEN model, mining subsidence prediction

Ruisheng Jia; Yanjun Peng; Hongmei Sun

2011-01-01T23:59:59.000Z

167

third series volume xv part 2 2002 Table of Contents  

E-Print Network (OSTI)

following death.2 Stratum B com- The author is indebted to Donald Harper, John Lagerwey, and Michael J and Immortality in the Mind of Han China," H JAS 25 (1965), pp. 80­122; and idem, "`O Soul, Come Back!' A Study jing chao jiabu zhi wei" , Li- shi yuyan yanjiusuo jikan 18 (1948), pp. 375­84; and Li Gang , "Ye lun

Paris-Sud XI, Université de

168

Standard Deviation of the Copolar Correlation Coefficient for Simultaneous Transmission and Reception of Vertical and Horizontal Polarized Weather Radar Signals  

Science Conference Proceedings (OSTI)

The perturbation method is used to derive the variance of the zero-lag copolar correlation coefficient, ?|??HV?|?, for a radar simultaneously transmitting and receiving both horizontal and vertical polarization. The variance of ?|??HV?|? is a ...

Enrico Torlaschi; Yves Gingras

2003-05-01T23:59:59.000Z

169

Estimator for the Standard Deviation of Wind Direction Based on Moments of the Cartesian Components  

Science Conference Proceedings (OSTI)

Mean and variance of horizontal wind direction are defined in a minimal variance sense. Starting from a theoretical model, termed anisotropic Gaussian model, of the probability density functions of the Cartesian wind components, the standard ...

Rudolf Weber

1991-09-01T23:59:59.000Z

170

The Annual Peak in the SST Anomaly Spectrum  

Science Conference Proceedings (OSTI)

The manner in which monthly mean sea surface temperature anomalies (SSTAs) show enhanced variance at the annual period in the extratropics (an annual peak in the variance spectrum) is illustrated by observations and model simulations. A mechanism,...

Jens Möller; Dietmar Dommenget; Vladimir A. Semenov

2008-06-01T23:59:59.000Z

171

Low-Frequency Velocity and Temperature Fluctuations in Katabatic Valley Flows  

Science Conference Proceedings (OSTI)

Observations of velocity and temperature fluctuations made during katabatic flow conditions in two deeply incised valleys are analyzed using variance, coherence, and phase spectra. Variance spectra obtained at valley floor sidewall locations show ...

G. L. Stone; D. E. Hoard

1989-06-01T23:59:59.000Z

172

Variability of Space–Time Mean Rain Rate  

Science Conference Proceedings (OSTI)

A mixed lognormal distribution is fit to rain-rate data for the purpose of estimating the space–time mean. Using Fisher information, the large sample variance is obtained for grouped and ungrouped data estimates. The asymptotic variance results ...

B. Kedem; R. Pfeiffer; D. A. Short

1997-05-01T23:59:59.000Z

173

Sources of Gravity Wave Activity Seen in the Vertical Velocities Observed by the Flatland VHF Radar  

Science Conference Proceedings (OSTI)

Observations of vertical velocity made with the Flatland VHF radar located in the extremely flat terrain near Champaign, Illinois, are used to study sources of enhanced variance. The variance is used as an indicator of gravity wave activity. In ...

G. D. Nastrom; M. R. Peterson; J. L. Green; K. S. Gage; T. E. VanZandt

1990-08-01T23:59:59.000Z

174

Changes of Variability in Response to Increasing Greenhouse Gases. Part I: Temperature  

Science Conference Proceedings (OSTI)

This study documents the temperature variance change in two different versions of a coupled ocean–atmosphere general circulation model forced with estimates of future increases of greenhouse gas (GHG) and aerosol concentrations. The variance ...

R. J. Stouffer; R. T. Wetherald

2007-11-01T23:59:59.000Z

175

Tate, 2011  

Science Conference Proceedings (OSTI)

Apr 1, 2010 ... explaining human social behavior have gained popularity. Electronic .... because systematic error variance from genetic and phys- iological ...

176

Fairness in the Air: California's Air Pollution Hearing Boards  

E-Print Network (OSTI)

Emergency Variance of Duke Energy South Bay LLC, No. 3919).of Energy Pol- icy Through an Exceptions Process, 1984 DUKE

Manaster, Kenneth A.

2005-01-01T23:59:59.000Z

177

Original article: Using the continuous price as control variate for discretely monitored options  

Science Conference Proceedings (OSTI)

Variance reduction is of highest importance in financial simulation. In this study, we present a new and simple variance reduction technique for pricing discretely monitored lookback and barrier options. It is based on using the corresponding continuously ... Keywords: Control variate, Option pricing, Path dependent options, Variance reduction

Kemal Dinçer Dingeç; Wolfgang Hörmann

2011-12-01T23:59:59.000Z

178

A Hamilton-Jacobi-Bellman approach to optimal trade execution  

Science Conference Proceedings (OSTI)

The optimal trade execution problem is formulated in terms of a mean-variance tradeoff, as seen at the initial time. The mean-variance problem can be embedded in a linear-quadratic (LQ) optimal stochastic control problem. A semi-Lagrangian scheme is ... Keywords: HJB equation, Mean-variance tradeoff, Optimal execution, Semi-Lagrangian discretization, Viscosity solution

Peter A. Forsyth

2011-02-01T23:59:59.000Z

179

An assessment of the measurement equivalence of rating sources in a multisource feedback system  

E-Print Network (OSTI)

The present study used confirmatory factor analysis to evaluate a series of models representing the relations among performance ratings from multiple sources across multiple performance dimensions. The results suggest that the variance in performance ratings can be attributed to three distinct sources. First, there is common variance attributable to performance dimensions or factor loadings. Second, there is variance that can be attributed to the rating source (peer, self, or supervisor). Third, there is unique variance beyond that explained by the performance dimensions and source effects. Further, these results suggest that the rating sources appear to be rating the same performance dimensions, and even tapping the performance constructs to the same extent in some cases. The source effects do account for some variance, but these effects are smaller than the performance dimensions. Additionally, the unique variance accounted for a large component of the variance associated with the performance ratings in the present study.

Sheehan, Mary Kathleen

1999-01-01T23:59:59.000Z

180

a variational formulation for frame-based inverse problems  

E-Print Network (OSTI)

variance matrix ?, the function ? reduces (up to an additive constant) to the residual energy ...... are performed with M = 4 using the filter bank proposed in [1].

Note: This page contains sample records for the topic "variance stratum stratum3" 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

Strategic trade policy, cost uncertainty and FDI determinants.  

E-Print Network (OSTI)

??The focus of my dissertation is in two areas: the relationship between optimal trade policy and demand / cost variances when the timing of investment… (more)

Guo, Yan

2013-01-01T23:59:59.000Z

182

NREL: Energy Analysis - Brian W Bush  

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

B.; Jenkin, T.; Lipowicz, D.; Arent, D. J.; Cooke, R. (2012). Variance Analysis of Wind and Natural Gas Generation under Different Market Structures: Some Observations. 50...

183

4.6.2. Alaska Pipeline  

Science Conference Proceedings (OSTI)

4. Process Modeling 4.6. Case Studies in Process Modeling 4.6.2. Alaska Pipeline. Non-Homogeneous Variances, This ...

2012-03-31T23:59:59.000Z

184

Glossary of Environment, Safety and Health Terms  

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

Code of Federal Regulations, are treated as variances.) EH62dd1 205. EVALUATION GUIDELINES. The radioactive material dose value that the safety analysis evaluates against. The...

185

Environmental Management Commission (Alabama)  

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

The Alabama Department of Environmental Management is charged with developing the state's environmental policy, hearing administrative appeals of permits, administrative orders and variances issued...

186

Hedging Problems with Stochastic Parameters  

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

the problems of quadratic hedging and mean-variance portfolio selection in an incomplete market with continuous trading, multiple assets, and Brownian information. In particular,...

187

REVISED-FINAL-1ST-QUARTER-FY-2013-SCORECARD-09-05-13.xlsx  

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

Project MILESTONE FIELD ID MILESTONE NAME MILESTONE DESCRIPTION VARIANCE NARRATIVE FORECAST DATE ACTUAL DATE REGULATORY AGREEMENT NAME DESIGNATIONS BASELINE COMPLETION DATE...

188

Environmental Compliance Performance Scorecard ??? Fourth...  

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

MILESTONE FIELD ID MILESTONE NAME MILESTONE DESCRIPTION BASELINE COMPLETION DATE FORECAST DATE ACTUAL DATE STATUS NARRATIVE VARIANCE NARRATIVE REGULATORY AGREEMENT NAME...

189

Environmental Compliance Performance Scorecard ??? First...  

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

MILESTONE FIELD ID MILESTONE NAME MILESTONE DESCRIPTION BASELINE COMPLETION DATE FORECAST DATE ACTUAL DATE STATUS NARRATIVE VARIANCE NARRATIVE REGULATORY AGREEMENT NAME...

190

Measuring and Modeling Applications for Content Distribution in the Internet  

E-Print Network (OSTI)

Function for podcast content. ACF values upto lag=10 suggestrelated podcasters concentrate on general well being. ACFACF for Content Received Aggregate Variance Method:Hurst

Banerjee, Anirban

2008-01-01T23:59:59.000Z

191

Spectral Bounds for Sparse PCA: Exact and Greedy Algorithms  

E-Print Network (OSTI)

computational costs and promote better generalization in learning algorithms. .... of an algorithm is to plot its variance curve ˜v(k) and compare it with the optimal ...

192

The Development and Psychometric Modeling of an Embedded Assessment for a Data Modeling and Statistical Reasoning Learning Progression  

E-Print Network (OSTI)

PV Reliabilities by Construct18 Conceptions of Statistics ModelPV reliability is the explained variance according to the estimated model

Schwartz, Robert Andrew

2012-01-01T23:59:59.000Z

193

Office of Headquarters Security Operations: Deviations Program  

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

Headquarters facilities with an appropriately validated variance, waiver, or exception to DOE orders andor Headquarters security directives when adequately justified. Requests for...

194

Essays on the household-level effects of house price growth  

E-Print Network (OSTI)

Constructing measures of house price variance . . . . 2.4.4Flip That House? House Price Dynamics and Housing InvestmentHouse Price Data . . . . . . . . . . . . . . . . . . . . .

Sitgraves, Claudia Ayanna

2009-01-01T23:59:59.000Z

195

RESEARCH ARTICLE Optimal Scenario Tree Reduction for ...  

E-Print Network (OSTI)

scenarios) for streamflows of the jth hydroelectric plant. Our choice is based on the fact that when scenarios are discarded, variance tends to decrease.

196

Linkage of anthropogenic aerosol to clouds and climate. Progress report No. 3  

Science Conference Proceedings (OSTI)

During the first year of this project equipment was built to obtain direct droplet measurement data from a mobile platform in fog (or mountain impacted stratum) and to characterize CCN according to particle volatility (thermal processing). Since the start date, July 15, 1990, was during the California stratus season and it was necessary to complete the construction of equipment and allow time before a field project it was not possible to begin field work until the summer of 1991. This report discusses surface measurements made in 1991 and 1992 as well as the SEAHUNT (Shiptrail Evolution Above High Updraft Naval Targets) Project and the ASTEX (Atlantic Stratocumulus Transition Experiment) Project.

Hudson, J.G.

1992-12-14T23:59:59.000Z

197

 

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

File02: File02: (file02_cb83.csv) BLDGID2 Building ID STR402 Half-sample stratum PAIR402 Half-sample pair number SQFTC2 Square footage $SQFTC17. BCWM2C Principal activity $BCWOM25. YRCONC2C Year constructed $YRCONC15 REGION2 Census region $REGION13 XSECWT2 Cross-sectional weight ELSUPL2N Supplier reported electricity use $YESNO15. NGSUPL2N Supplier reported natural gas use $YESNO15. FKSUPL2N Supplier reported fuel oil use $YESNO15.

198

Agency datasets monthly list | Data.gov  

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

Priority Development Area (Solar Energy Zone) and Variance Area letter-size Maps for Arizona Map (letter-size) showing BLM-administered lands available for solar energy development as identified in the Solar PEIS Record of Decision, including maps of the solar energy zones (SEZs) and the variance areas. DOI BLM Energy and Utilities 2013-08-13 10:51:54 Priority Development Area (Solar Energy Zone) and Variance Area letter-size Maps for Arizona Map (letter-size) showing BLM-administered lands available for solar energy development as identified in the Solar PEIS Record of Decision, including maps of the solar energy zones (SEZs) and the variance areas. DOI BLM Energy and Utilities 2013-08-13 10:51:54 Priority Development Area (Solar Energy Zone) and Variance Area poster-size Maps for Arizona Map (poster-size) showing BLM-administered lands available for solar energy development as identified in the Solar PEIS Record of Decision, including maps of the solar energy zones (SEZs) and the variance areas. DOI BLM Energy and Utilities 2013-08-13 10:51:54 Priority Development Area (Solar Energy Zone) and Variance Area letter-size Maps for California Map (letter-size) showing BLM-administered lands available for solar energy development as identified in the Solar PEIS Record of Decision, including maps of the solar energy zones (SEZs) and the variance areas. DOI BLM Energy and Utilities 2013-08-13 10:51:54

199

High-Frequency Internal Waves at 0°, 140°W and Their Possible Relationship to Deep-Cycle Turbulence  

Science Conference Proceedings (OSTI)

An analysis of a moored time series at 0°, 140°W from November to December 1991 found a nighttime enhancement of isotherm displacement variance and of zonal velocity variance below the surface mixed layer at frequencies higher than 1 cph. The ...

Ren-Chieh Lien; Michael J. McPhaden; Michael C. Gregg

1996-04-01T23:59:59.000Z

200

Digitization Noise in Power Spectral Analysis  

Science Conference Proceedings (OSTI)

It is well-known that the digitization noise variance is ?2/12 for a continuous time series sampled with the signal resolution ?. It is also generally accepted that this variance often has a white-power spectral density. We have examined in ...

L. Kristensen; P. Kirkegaard

1987-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "variance stratum stratum3" 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

Parametric and non-parametric approaches in evaluating martingale hypothesis of energy spot markets  

Science Conference Proceedings (OSTI)

This study examined the martingale hypothesis in the spot prices of the petroleum products markets. Under the parametric and non-parametric variance ratio tests, the independent and identically distributed increments and less restrictive martingale increments ... Keywords: Energy spot markets, Financial time series, Martingale process, Structural break, Variance ratio test

Chin Wen Cheong

2011-09-01T23:59:59.000Z

202

CSEM WP 136 Is Real-Time Pricing Green?: The Environmental  

E-Print Network (OSTI)

in variance on emissions of SO2, NOx, and CO2. According to our estimates, a reduction in within-day load, the reduction leads to significant increases in SO2 and NOx, but not in CO2. Recall that these regions also show that RTP will reduce variance of electricity load and estimate the short-run impacts of a reduction

California at Berkeley. University of

203

Understanding and comparisons of different sampling approaches for the Fourier Amplitudes Sensitivity Test (FAST)  

Science Conference Proceedings (OSTI)

Fourier Amplitude Sensitivity Test (FAST) is one of the most popular uncertainty and sensitivity analysis techniques. It uses a periodic sampling approach and a Fourier transformation to decompose the variance of a model output into partial variances ... Keywords: Fourier Amplitude Sensitivity Test, Interactions, Random balance design, Sensitivity analysis, Simple random sampling, Uncertainty analysis

Chonggang Xu; George Gertner

2011-01-01T23:59:59.000Z

204

Uncertainty measures for general Type-2 fuzzy sets  

Science Conference Proceedings (OSTI)

Five uncertainty measures have previously been defined for interval Type-2 fuzzy sets (IT2 FSs), namely centroid, cardinality, fuzziness, variance and skewness. Based on a recently developed @a-plane representation for a general T2 FS, this paper generalizes ... Keywords: ?-Plane representation, Cardinality, Centroid, Fuzziness, Skewness, Type-2 fuzzy sets, Uncertainty measures, Variance

Daoyuan Zhai; Jerry M. Mendel

2011-02-01T23:59:59.000Z

205

Model of the PCB and mercury exposure of mink and great blue heron inhabiting the off-site environment downstream from the US Department of Energy Oak Ridge Reservation. Environmental Restoration Program  

SciTech Connect

This report presents a pair of wildlife exposure models developed for use in investigating the risks to wildlife of releases of mercury and PCBS. The species modeled are the great blue heron and mink The models may be used to estimate the exposure experienced by mink and herons, to help establish remedial action goals and to identify research needs. Because mercury and PCBs bioaccumulate through dietary uptake, the models simulate the food webs supporting the two species. Sources of contaminants include surface water, sediment, sediment pore water, and soil. The model are stochastic equilibrium models. Two types of variance in the input parameters are distinguished: stochastic variance among individual mink and herons and ignorance concerning true parameter values. The variance in the output due to stochastic parameters indicates the expected variance among the receptors. The variance due to ignorance indicates the extent to which the model outputs could be unpaved by additional sampling and measurement. The results of the models were compared to concentrations measured in great blue heron eggs and nestlings from colonies on the Clinch and Tennessee Rivers. The predicted concentrations agreed well with the measured concentrations. In addition, the variances in measured values among individuals was approximately equal to the total stochastic variance predicted by the models.

MacIntosh, D.L. [Indiana Univ., Bloomington, IN (United States). School of Public and Environmental Affairs; Suter, G.W. II; Hoffman, F.O. [Oak Ridge National Lab., TN (United States)

1992-09-01T23:59:59.000Z

206

Model of the PCB and mercury exposure of mink and great blue heron inhabiting the off-site environment downstream from the US Department of Energy Oak Ridge Reservation  

SciTech Connect

This report presents a pair of wildlife exposure models developed for use in investigating the risks to wildlife of releases of mercury and PCBS. The species modeled are the great blue heron and mink The models may be used to estimate the exposure experienced by mink and herons, to help establish remedial action goals and to identify research needs. Because mercury and PCBs bioaccumulate through dietary uptake, the models simulate the food webs supporting the two species. Sources of contaminants include surface water, sediment, sediment pore water, and soil. The model are stochastic equilibrium models. Two types of variance in the input parameters are distinguished: stochastic variance among individual mink and herons and ignorance concerning true parameter values. The variance in the output due to stochastic parameters indicates the expected variance among the receptors. The variance due to ignorance indicates the extent to which the model outputs could be unpaved by additional sampling and measurement. The results of the models were compared to concentrations measured in great blue heron eggs and nestlings from colonies on the Clinch and Tennessee Rivers. The predicted concentrations agreed well with the measured concentrations. In addition, the variances in measured values among individuals was approximately equal to the total stochastic variance predicted by the models.

MacIntosh, D.L. (Indiana Univ., Bloomington, IN (United States). School of Public and Environmental Affairs); Suter, G.W. II; Hoffman, F.O. (Oak Ridge National Lab., TN (United States))

1992-09-01T23:59:59.000Z

207

Spectral and Parametric Averaging for Integrable Systems  

E-Print Network (OSTI)

We analyze two theoretical approaches to ensemble averaging for integrable systems in quantum chaos - spectral averaging and parametric averaging. For spectral averaging, we introduce a new procedure - rescaled spectral averaging. Unlike traditional spectral averaging, it can describe the correlation function of spectral staircase and produce persistent oscillations of the interval level number variance. Parametric averaging, while not as accurate as rescaled spectral averaging for the correlation function of spectral staircase and interval level number variance, can also produce persistent oscillations of the global level number variance and better describes saturation level rigidity as a function of the running energy. Overall, it is the most reliable method for a wide range of statistics.

Tao Ma; R. A. Serota

2013-06-03T23:59:59.000Z

208

A Hybrid (Monte-Carlo/Deterministic) Approach for Multi-Dimensional Radiation Transport  

E-Print Network (OSTI)

A novel hybrid Monte Carlo transport scheme is demonstrated in a scene with solar illumination, scattering and absorbing 2D atmosphere, a textured reflecting mountain, and a small detector located in the sky (mounted on a satellite or a airplane). It uses a deterministic approximation of an adjoint transport solution to reduce variance, computed quickly by ignoring atmospheric interactions. This allows significant variance and computational cost reductions when the atmospheric scattering and absorption coefficient are small. When combined with an atmospheric photon-redirection scheme, significant variance reduction (equivalently acceleration) is achieved in the presence of atmospheric interactions.

Guillaume Bal; Anthony Davis; Ian Langmore

2011-05-07T23:59:59.000Z

209

Decoherence without classicality in the resonant quantum kicked rotor  

E-Print Network (OSTI)

We study the quantum kicked rotor in resonance subjected to an unitary noise defined through Kraus operators, we show that this type of decoherence does not, in general, lead to the classical diffusive behavior. We find exact analytical expressions for the density matrix and the variance in the primary resonances. The variance does not loose its ballistic behavior, however the coherence decays as a power law. The secondary resonances are treated numerically, obtaining a power-law decay for the variance and an exponential law decay for the coherence.

A. Romanelli

2009-05-05T23:59:59.000Z

210

Representation, simulation and control of manufacturing process with different forms of uncertainties  

Science Conference Proceedings (OSTI)

This paper suggests a new methodology for effectively describing and analyzing manufacturing processes with uncertainties. Uncertain information in the form of variance and vagueness are captured using probability distribution and fuzzy logic. The captured ...

Hyunsoo Lee; Hongsuk Park; Amamath Banerjee

2009-12-01T23:59:59.000Z

211

Diurnal to Annual Precipitation Sensitivity to Convective and Land Surface Schemes  

Science Conference Proceedings (OSTI)

Precipitation’s diurnal to annual variance distribution and atmospheric water cycle component interactions are examined globally for sensitivity to convective and land surface schemes. The main regional features of statistics identified in ...

Alex C. Ruane; John O. Roads

2008-06-01T23:59:59.000Z

212

Modeling aviation's global emissions, uncertainty analysis, and applications to policy  

E-Print Network (OSTI)

(cont.) fuel burn results below 3000 ft. For emissions, the emissions indices were the most influential uncertainties for the variance in model outputs. By employing the model, this thesis examined three policy options for ...

Lee, Joosung Joseph, 1974-

2005-01-01T23:59:59.000Z

213

Variations in Apparent Mixing Efficiency in the North Atlantic Central Water  

Science Conference Proceedings (OSTI)

Microstructure data from the North Atlantic Tracer Release Experiment (NATRE) are presented, providing detailed profiles of the thermal variance ? in the upper 360 m of the Canary Basin for the fall and spring seasons. The Osborn–Cox model is ...

Barry Ruddick; David Walsh; Neil Oakey

1997-12-01T23:59:59.000Z

214

Spectral Decomposition of Two-Dimensional Atmospheric Fields on Limited-Area Domains Using the Discrete Cosine Transform (DCT)  

Science Conference Proceedings (OSTI)

For most atmospheric fields, the larger part of the spatial variance is contained in the planetary scales. When examined over a limited area, these atmospheric fields exhibit an aperiodic structure, with large trends across the domain. Trying to ...

Bertrand Denis; Jean Côté; René Laprise

2002-07-01T23:59:59.000Z

215

Regional Characteristics of the Northern Hemisphere Wintertime Circulation: A Comparison of the Simulation of a GFDL General Circulation Model with Observations  

Science Conference Proceedings (OSTI)

The hemispheric distributions of a selected set of temporal mean, variance and covariance statistics produced by a general circulation model developed at the Geophysical Fluid Dynamics Laboratory are compared with observations. The fields ...

Maurice L. Blackmon; Ngar-Cheung Lau

1980-03-01T23:59:59.000Z

216

Decadal Variability of the Aleutian Low and Its Relation to High-Latitude Circulation  

Science Conference Proceedings (OSTI)

The January–February mean central pressure of the Aleutian low is investigated as an index of North Pacific variability on interannual to decadal timescales. Since the turn of the century, 37% of the winter interannual variance of the Aleutian ...

James E. Overland; Jennifer Miletta Adams; Nicholas A. Bond

1999-05-01T23:59:59.000Z

217

Regional Ensemble Forecasts Using the Ensemble Transform Technique  

Science Conference Proceedings (OSTI)

A computationally inexpensive ensemble transform (ET) method for generating high-resolution initial perturbations for regional ensemble forecasts is introduced. The method provides initial perturbations that (i) have an initial variance ...

Craig H. Bishop; Teddy R. Holt; Jason Nachamkin; Sue Chen; Justin G. McLay; James D. Doyle; William T. Thompson

2009-01-01T23:59:59.000Z

218

Sources of Mesoscale Variability of Gravity Waves. Part I: Topographic Excitation  

Science Conference Proceedings (OSTI)

Aircraft measurements of winds and temperatures collected during the GASP program are used to study the effects of topography as a source of mesoscale variability. Variances of fluctuations at the mesoscale over rough terrain are enhanced up to ...

Gregory D. Nastrom; David C. Fritts

1992-01-01T23:59:59.000Z

219

The Continuum of Hydroclimate Variability in Western North America during the Last Millennium  

Science Conference Proceedings (OSTI)

The distribution of climatic variance across the frequency spectrum has substantial importance for anticipating how climate will evolve in the future. Here power spectra and power laws (?) are estimated from instrumental, proxy, and climate model ...

Toby R. Ault; Julia E. Cole; Jonathan T. Overpeck; Gregory T. Pederson; Scott St. George; Bette Otto-Bliesner; Connie A. Woodhouse; Clara Deser

2013-08-01T23:59:59.000Z

220

Theory and Applications of the Minimum Spanning Tree Rank Histogram  

Science Conference Proceedings (OSTI)

A minimum spanning tree (MST) rank histogram (RH) is a multidimensional ensemble reliability verification tool. The construction of debiased, decorrelated, and covariance-homogenized MST RHs is described. Experiments using Euclidean L2, variance, ...

Daniel Gombos; James A. Hansen; Jun Du; Jeff McQueen

2007-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "variance stratum stratum3" 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

Effects of Coarsely Resolved and Temporally Interpolated Lateral Boundary Conditions on the Dispersion of Limited-Area Ensemble Forecasts  

Science Conference Proceedings (OSTI)

This work examines the impact of coarsely resolved and temporally interpolated lateral boundary conditions (LBCs) on the dispersion of limited-area-model (LAM) ensemble forecasts. An expression is developed that links error variance spectra to ...

Paul Nutter; David Stensrud; Ming Xue

2004-10-01T23:59:59.000Z

222

Quasi-Monotone Advection Schemes Based on Explicit Locally Adaptive Dissipation  

Science Conference Proceedings (OSTI)

The authors develop and test computational methods for advection of a scalar field that also include a minimal dissipation of its variance in order to preclude the formation of false extrema. Both of these properties are desirable for advectively ...

Alexander F. Shchepetkin; James C. McWilliams

1998-06-01T23:59:59.000Z

223

Radar Detection of Turbulence in Precipitation Environments  

Science Conference Proceedings (OSTI)

Imperfect particle tracer response is incorporated into the relations describing the turbulent air motion contribution to Doppler radar spectrum mean and variance. Tracer effects on radar estimates of the eddy dissipation rate (?) increase with ...

Alan R. Bohne

1982-08-01T23:59:59.000Z

224

Space-Time Spectral Structure of a GLAS General Circulation Model and a Comparison with Observations  

Science Conference Proceedings (OSTI)

The wavenumber-frequency spectra of geopotential height have been computed from a winter simulation of a GLAS general circulation model, and are compared to the spectra obtained from 15 winters of observed analyses. The variances in several ...

David M. Straus; J. Shukla

1981-05-01T23:59:59.000Z

225

Dominant Balances and Exchanges of the Atmospheric Water Cycle in the Reanalysis 2 at Diurnal, Annual, and Intraseasonal Time Scales  

Science Conference Proceedings (OSTI)

Output from the National Centers for Environmental Prediction–Department of Energy (NCEP–DOE) Reanalysis 2 (R2) is passed through a broadband filter to determine the normalized covariances that describe the variance of the atmospheric water cycle ...

Alex C. Ruane; John O. Roads

2008-08-01T23:59:59.000Z

226

vol. 151, no. 3 the american naturalist march 1998 Notes and Comments  

E-Print Network (OSTI)

.Keywords: stability, diversity, community ecology, stochasticity, mean and variance, competition. Inspection to proportional rescaling. For instance, ifPimm 1979, 1984; Frank and McNaughton 1991; Lawton and Brown 1993

Minnesota, University of

227

Behavior of Turbulence Statistics in the Convective Boundary Layer  

Science Conference Proceedings (OSTI)

Velocity variances in the convective boundary layer are examined using data derived in PBL experiments over land (Minnesota) and ocean (the Coral Sea) supported by data from the Kansas study of the surface boundary layer. In the freely convective ...

B. B. Hicks

1985-06-01T23:59:59.000Z

228

Interannual Variability of Precipitation in an Ensemble of AMIP Climate Simulations Conducted with the CCC GCM2  

Science Conference Proceedings (OSTI)

In this paper log–linear analysis and analysis of variance methods were used to analyze the interannual variability and potential predictability of precipitation as simulated in an ensemble of six 10-yr Atmospheric Model Intercomparison Project ...

Xiaolan L. Wang; Francis W. Zwiers

1999-05-01T23:59:59.000Z

229

Patterns of Interannual Variability in the Northern Hemisphere Wintertime 850 mb Temperature Field  

Science Conference Proceedings (OSTI)

Interannual fluctuations of observed winter seasonal mean 850 mb temperatures over the Northern Hemisphere during 1958–73 are documented and compared with midtropospheric height variations. Interannual temperature variance maxima are found over ...

David S. Gutzler; Richard D. Rosen; David A. Salstein; JoséP. Peixoto

1988-10-01T23:59:59.000Z

230

PBL Stratiform Cloud Inhomogeneities Thermally Induced by the Orography: A Parameterization for Climate Models  

Science Conference Proceedings (OSTI)

This paper proposes a parameterization for use in climate models of the orographic variance and associated thermal circulation's impact on the macroscopic behavior of planetary boundary layer (PBL) stratiform clouds. Orographically induced ...

Rafael Terra

2004-03-01T23:59:59.000Z

231

Sources of Mesoscale Variability of Gravity Waves. Part II: Frontal, Convective, and Jet Stream Excitation  

Science Conference Proceedings (OSTI)

We present studies of four cases of mesoscale variance enhancements of horizontal velocity and temperature due to frontal activity, nonfrontal convection, and wind shear. These data were obtained aboard commercial aircraft during the Global ...

David C. Fritts; Gregory D. Nastrom

1992-01-01T23:59:59.000Z

232

A New Set of Orthogonal Patterns in Weather and Climate: Optimally Interpolated Patterns  

Science Conference Proceedings (OSTI)

A new spectral-based approach is presented to find orthogonal patterns from gridded weather/climate data. The method is based on optimizing the interpolation error variance. The optimally interpolated patterns (OIP) are then given by the ...

A. Hannachi

2008-12-01T23:59:59.000Z

233

Robust Ensemble Filtering and Its Relation to Covariance Inflation in the Ensemble Kalman Filter  

Science Conference Proceedings (OSTI)

A robust ensemble filtering scheme based on the H? filtering theory is proposed. The optimal H? filter is derived by minimizing the supremum (or maximum) of a predefined cost function, a criterion different from the minimum variance used in the ...

Xiaodong Luo; Ibrahim Hoteit

2011-12-01T23:59:59.000Z

234

Uncertainties, Trends, and Hottest and Coldest Years of U.S. Surface Air Temperature since 1895: An Update Based on the USHCN V2 TOB Data  

Science Conference Proceedings (OSTI)

This paper estimates the sampling error variances of gridded monthly U.S. Historical Climatology Network, version 2 (USHCN V2), time-of-observation-biases (TOB)-adjusted data. The analysis of mean surface air temperature (SAT) assesses ...

Samuel S. P. Shen; Christine K. Lee; Jay Lawrimore

2012-06-01T23:59:59.000Z

235

A Method for Estimating Planetary Boundary Layer Heights and Its Application over the ARM Southern Great Plains Site  

Science Conference Proceedings (OSTI)

A new objective method to determine the height of the planetary boundary layer (PBL) is presented here. PBL heights are computed using the statistical variance and kurtosis of dewpoint and virtual potential temperature differences measured from ...

Paul Schmid; Dev Niyogi

2012-03-01T23:59:59.000Z

236

Observed Southern Hemisphere Eddy Statistics at 500 mb: Frequency and Spatial Dependence  

Science Conference Proceedings (OSTI)

Nearly eight years of daily Southern Hemisphere analyses at 500 mb have been used to define the spatial dependence of the variance fields of geopotential height and the two geostrophic wind components, the corresponding covariance fields, and the ...

Kevin E. Trenberth

1981-12-01T23:59:59.000Z

237

Surface Winds from Tropical Pacific Islands—Climatological Statistics  

Science Conference Proceedings (OSTI)

Multidecadal time series of surface wind observations from tropical Pacific islands have been examined in order to investigate the space and time scales of variability. Climatological monthly means and variances are compared with comparable means ...

D. E. Harrison; D. S. Luther

1990-02-01T23:59:59.000Z

238

On the Use of “Inflation” in Statistical Downscaling  

Science Conference Proceedings (OSTI)

The technique of “inflating” in downscaling, which makes the downscaled climate variable have the right variance, is based on the assumption that all local variability can be traced back to large-scale variability. For practical situations this ...

Hans von Storch

1999-12-01T23:59:59.000Z

239

Gravity Wave Structure between 60 and 90 km Inferred from Space Shuttle Reentry Data  

Science Conference Proceedings (OSTI)

Density fluctuations obtained along seven space shuttle reentry tracks are used in this paper to examine the horizontal structure and the vertical distribution of density variance in the mesosphere and lower thermosphere. The tracks lie primarily ...

David C. Fritts; Robert C. Blanchard; Lawrence Coy

1989-02-01T23:59:59.000Z

240

Rational plunging and the option value of sequential investment : the case of petroleum exploration  

E-Print Network (OSTI)

Any investor in assets that can be exploited sequentially faces a tradeoff between diversification and concentration. Loading a portfolio with correlated assets has the potential to inflate variance, but also creates ...

Smith, James L.

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "variance stratum stratum3" 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

Application of Lateral Boundary Condition Perturbations to Help Restore Dispersion in Limited-Area Ensemble Forecasts  

Science Conference Proceedings (OSTI)

In a companion paper, the authors showed that lateral boundary condition (LBC) constraints on small-scale error variance growth are sufficient to limit dispersion in limited-area-model (LAM) ensemble simulations. The error growth constraints ...

Paul Nutter; Ming Xue; David Stensrud

2004-10-01T23:59:59.000Z

242

Estimating Averaging Times for Point and Path-Averaged Measurements of Turbulence Spectra  

Science Conference Proceedings (OSTI)

Uncertainty over how long to average turbulence variables to achieve some desired level of statistical stability is a common concern in boundary-layer meteorology. Several models exist that predict averaging times for measurements of variances ...

Edgar L. Andreas

1988-03-01T23:59:59.000Z

243

Experimental Determination of Water Vapor Profiles from Ground-Based Radiometer Measurements at 21.0 and 31.4 GHz.  

Science Conference Proceedings (OSTI)

Water vapor profiles have been obtained from radiometer measurements at 21.0 and 31.4 GHz and ground values of humidity, temperature and pressure. The inversion technique was based on minimum variance estimation, including constraints derived ...

B. G. Skoog; J. I. H. Askne; G. Elgered

1982-03-01T23:59:59.000Z

244

Quantum bios and biotic complexity in the distribution of galaxies: Research Articles  

Science Conference Proceedings (OSTI)

Bios is a nonstationary chaotic pattern that resembles stochastic noise. New time series analyses identify features of creativity, namely episodic patterns, novelty, increasing variance, and nonrandom complexity. These properties characterize bios and ... Keywords: bios, chaos, complexity, galaxies, quantum physics

Hector Sabelli; Lazar Kovacevic

2006-03-01T23:59:59.000Z

245

A Statistical Generalization of the Transformed Eulerian-Mean Circulation for an Arbitrary Vertical Coordinate System  

Science Conference Proceedings (OSTI)

A new method is derived for approximating the mean meridional circulation in an arbitrary vertical coordinate system using only the time-mean and zonally averaged meridional velocity, meridional eddy transport, and eddy variance. The method is ...

Olivier Pauluis; Tiffany Shaw; Frédéric Laliberté

2011-08-01T23:59:59.000Z

246

Alternatives to the gradient in optimal transfer line buffer allocation  

E-Print Network (OSTI)

This thesis describes several directions to replace the gradient in James Schor's gradient algorithm to solve the dual problem. The alternative directions are: the variance and standard deviation of buffer levels, the ...

Tanizar, Ketty, 1978-

2004-01-01T23:59:59.000Z

247

Stochastic Dynamics of Baroclinic Waves  

Science Conference Proceedings (OSTI)

The maintenance of variance and attendant heat flux in linear, forced, dissipative baroclinic shear flows subject to stochastic excitation is examined. The baroclinic problem is intrinsically nonnormal and its stochastic dynamics is found to ...

Brian F. Farrell; Petros J. Ioannou

1993-12-01T23:59:59.000Z

248

A Robust Error-Based Rain Estimation Method for Polarimetric Radar. Part I: Development of a Method  

Science Conference Proceedings (OSTI)

The algorithms used to estimate rainfall from polarimetric radar variables show significant variance in error characteristics over the range of naturally occurring rain rates. As a consequence, to improve rainfall estimation accuracy using ...

Acacia S. Pepler; Peter T. May; Merhala Thurai

2011-10-01T23:59:59.000Z

249

Global Abyssal Mixing Inferred from Lowered ADCP Shear and CTD Strain Profiles  

Science Conference Proceedings (OSTI)

Internal wave–wave interaction theories and observations support a parameterization for the turbulent dissipation rate ? and eddy diffusivity K that depends on internal wave shear Vz2 and strain ?z2 variances. Its latest incarnation is ...

Eric Kunze; Eric Firing; Julia M. Hummon; Teresa K. Chereskin; Andreas M. Thurnherr

2006-08-01T23:59:59.000Z

250

El Niño–La Niña Asymmetry in the Coupled Model Intercomparison Project Simulations  

Science Conference Proceedings (OSTI)

The El Niño–La Niña asymmetry was estimated in the 10 different models participating in the Coupled Model Intercomparison Project (CMIP). Large differences in the “asymmetricity” (a variance-weighted skewness) of SST anomalies are found between ...

Soon-Il An; Yoo-Geun Ham; Jong-Seong Kug; Fei-Fei Jin; In-Sik Kang

2005-07-01T23:59:59.000Z

251

Spatiotemporal Behavior of the TIGGE Medium-Range Ensemble Forecasts  

Science Conference Proceedings (OSTI)

Using the recently developed mean–variance of logarithms (MVL) diagram, together with The Observing System Research and Predictability Experiment (THORPEX) Interactive Grand Global Ensemble (TIGGE) archive of medium-range ensemble forecasts from ...

Zak Kipling; Cristina Primo; Andrew Charlton-Perez

2011-08-01T23:59:59.000Z

252

Long-Term Central Coastal California Precipitation Variability and Relationships to El Niño-Southern Oscillation  

Science Conference Proceedings (OSTI)

Long precipitation reconstructions (600 years) developed for Santa Barbara, California, using new big-cone spruce tree-ring chronologies capture over 55% of the annual precipitation variance. The modern period of the reconstruction is ...

Laura Haston; Joel Michaelsen

1994-09-01T23:59:59.000Z

253

Biasing of the Covariance-Based Spectral Mean Estimator in the Presence of Band-Limited Noise  

Science Conference Proceedings (OSTI)

Estimation of spectral mean frequency (spectral first moment) by the variance technique is considered for a signal process contaminated by band limited, additive noise. It is shown that the covariance-based spectral mean estimator is biased for ...

Albert J. Plueddemann; Robert Pinkel

1991-02-01T23:59:59.000Z

254

Clustering and disjoint principal component analysis  

Science Conference Proceedings (OSTI)

A constrained principal component analysis, which aims at a simultaneous clustering of objects and a partitioning of variables, is proposed. The new methodology allows us to identify components with maximum variance, each one a linear combination of ...

Maurizio Vichi; Gilbert Saporta

2009-06-01T23:59:59.000Z

255

Higher Moments of Net Proton Multiplicity Distributions at RHIC  

E-Print Network (OSTI)

We report the first measurements of the kurtosis (? [kappa]), skewness (S), and variance (? [sigma] [superscript 2]) of net-proton multiplicity (N [subscript p]-N [subscript p?] ) distributions at midrapidity for Au+Au ...

Balewski, Jan T.

256

US CMS- RP PMG US CMS- RP PMG US CMS- RP PMG  

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

which was substantially at variance with the existing plan. * Given the inelastic salary base, we must insure that we do not overspend this new FY04 and FY05 guidance. This...

257

Analysis of Convectively Coupled Kelvin Waves in the Indian Ocean MJO  

Science Conference Proceedings (OSTI)

The active convective phase of the Madden–Julian oscillation (hereafter active MJO) comprises enhanced moist deep convection on its own temporal and spatial scales as well as increased variance in convection associated with higher-frequency ...

Paul E. Roundy

2008-04-01T23:59:59.000Z

258

A Simple System for Mapping Conductivity Microstructure  

Science Conference Proceedings (OSTI)

A system for spatial mapping of the temperature variance dissipation rate ? based on conductivity micro-structure measurements from a towyo platform is described. The spatial response of the microconductivity probe is approximately that of a one-...

Libe Washburn; Thomas K. Deaton

1986-09-01T23:59:59.000Z

259

Spectral Budget Analysis of the Short-Range Forecast Error of the NMC Medium-Range Forecast Model  

Science Conference Proceedings (OSTI)

The budget of the systematic component of the short-range forecast error in the National Meteorological Center's Medium-Range Forecast Model (NMC MRF) is examined. The budget is computed for the spectral coefficients and the variances of ...

Masao Kanamitsu; Suranjana Saha

1995-06-01T23:59:59.000Z

260

Decreasing Reliability and Increasing Synchroneity of Western North American Streamflow  

Science Conference Proceedings (OSTI)

Assessing climate-related societal vulnerability and mitigating impacts requires timely diagnosis of the nature of regional hydrologic change. A late-twentieth-century emergent trend is discovered toward increasing year-to-year variance (...

Shaleen Jain; Martin Hoerling; Jon Eischeid

2005-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "variance stratum stratum3" 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

Some Tsunami Characteristics Deducible from Tide Records  

Science Conference Proceedings (OSTI)

After an initial 40-hour “diffusion” period, the time decay of tsunami variance was found to be uniformly exponents for 28 events among eight Pacific tide stations. Thew results essentially confirm Munk's acoustic deny hypothesis except that the ...

W. G. Van Dorn

1984-02-01T23:59:59.000Z

262

Interannual Environmental Variation and North American Fisheries  

Science Conference Proceedings (OSTI)

The problem of formulating optimal-regulation strategies for commercial fisheries is complicated by the large interannual fluctuations often observed in the numbers and locations of various fish populations. Much of the interannual variance seen ...

Kevin Hamilton

1987-12-01T23:59:59.000Z

263

Spectra Computed from a Limited Area Grid  

Science Conference Proceedings (OSTI)

A method is presented for determining variance spectra of meteorological fields specified on limited-area grids. Spectra so obtained are compared with global spectra of the same data. An example of scale decomposition (i.e., filtering) using this ...

Ronald M. Errico

1985-09-01T23:59:59.000Z

264

The Gaussian Approach to Adaptive Covariance Inflation and Its Implementation with the Local Ensemble Transform Kalman Filter  

Science Conference Proceedings (OSTI)

In ensemble Kalman filters, the underestimation of forecast error variance due to limited ensemble size and other sources of imperfection is commonly treated by empirical covariance inflation. To avoid manual optimization of multiplicative ...

Takemasa Miyoshi

2011-05-01T23:59:59.000Z

265

Adaptive congestion control of high speed ATM networks  

Science Conference Proceedings (OSTI)

Proportional control methods of controlling congestion in high speed ATM networks fail to achieve the desired performance due to the action delays, nonlinearities, and uncertainties in control loop. In this paper an adaptive minimum variance controller ...

Morteza Mosavi; Mahdi Jalili-Kharaajoo

2005-03-01T23:59:59.000Z

266

Sampling Turbulence in the Stratified Ocean: Statistical Consequences of Strong Intermittency  

Science Conference Proceedings (OSTI)

Turbulence and turbulent mixing in the ocean are strongly intermittent in amplitude, space and time. The degree of intermittency is measured by the “intermittency factor” ?2, defined as either ?2ln?, the variance of the logarithm of the viscous ...

Mark A. Baker; Carl H. Gibson

1987-10-01T23:59:59.000Z

267

Energy Dissipation Rates of Turbulence in the Stable Free Atmosphere  

Science Conference Proceedings (OSTI)

For stable stratification, it is pointed out that there exists a strong correlation between the intensity of atmospheric turbulence and the energy dissipation rate ?. It is given in terms of the variance of vertical velocity ?w2 and the Brunt-...

J. Weinstock

1981-04-01T23:59:59.000Z

268

Observations of Two Colorado Thunderstorms by Means of a Zenith-Pointing Doppler Radar  

Science Conference Proceedings (OSTI)

A description is given of the distributions of radar reflectivity, mean Doppler velocity, vertical air velocity and Doppler-velocity variance in two thunderstorms over eastern Colorado. A zenith-pointing Doppler radar was used to obtain data at ...

Louis J. Battan

1980-05-01T23:59:59.000Z

269

Weather pattern classification to represent the urban heat island in present and future climate  

Science Conference Proceedings (OSTI)

A classification of weather patterns (WP) is derived that is tailored to best represent situations relevant for the urban heat island (UHI). Three different types of k-means-based cluster methods are conducted. The explained cluster variance is ...

Peter Hoffmann; K. Heinke Schlünzen

270

Determining the Ocean Circulation and Improving the Geoid from Satellite Altimetry  

Science Conference Proceedings (OSTI)

The combined problem of determining the ocean circulation and improving the geoid from satellite altimetry is formulated and studied. Minimum variance estimation is used to form optimum estimates of the ocean topography and the geoid. These ...

John C. Marshall

1985-03-01T23:59:59.000Z

271

Reversible Record Breaking and Variability: Temperature Distributions across the Globe  

Science Conference Proceedings (OSTI)

Based on counts of record highs and lows, and employing reversibility in time, an approach to examining natural variability is proposed. The focus is on intrinsic variability; that is, variance separated from the trend in the mean. A variability ...

Amalia Anderson; Alexander Kostinski

2010-08-01T23:59:59.000Z

272

Some Effects of Soil and Vegetation Databases on Spectra of Limited-Area Mesoscale Simulations  

Science Conference Proceedings (OSTI)

Results are presented from an analysis of variance as a function of horizontal scale. The normalized difference-field spectra of kinetic energy, temperature, vapor mixing ratio, and cloud-water mixing ratio were computed as a function of ...

George D. Modica; Samuel Y-K. Yee; Joseph Venuti

1992-09-01T23:59:59.000Z

273

Combining GA and iterative MVDR for DOA estimation in space-time CDMA systems  

Science Conference Proceedings (OSTI)

This paper deals with direction-of-arrival (DOA) estimation of minimum variance distortionless response (MVDR) approach based on iterative searching technique for space-time code-division multiple access (CDMA) systems. It has been shown that the iterative ...

Jhih-Chung Chang

2012-11-01T23:59:59.000Z

274

Objective Array Design: Application to the Tropical Indian Ocean  

Science Conference Proceedings (OSTI)

A simple, versatile, computationally efficient ensemble-based method for objectively designing an observation array is described. The method seeks to compute the observation array that minimizes the analysis error variance, according to Kalman ...

Pavel Sakov; Peter R. Oke

2008-05-01T23:59:59.000Z

275

Spatial and Temporal Variability of Precipitation and Chemistry: Case Studies from the Frontal Boundary Study  

Science Conference Proceedings (OSTI)

Sequential precipitation and precipitation chemistry measurements were conducted on a 37-site, 100 km × 100 km array in central Ohio during four cyclonic storms during the fall of 1989. Spatial (network) averages and variances in rainfall rate ...

M. Terry Dana

1994-07-01T23:59:59.000Z

276

Short-Term Climate Variability and Atmospheric Teleconnections from Satellite-Observed Outgoing Longwave Radiation. Part I: Simultaneous Relationships  

Science Conference Proceedings (OSTI)

Satellite-inferred short-term climate variability and atmospheric teleconnections are studied using seven years (1974–81) of Outgoing Longwave Radiation (OLR) data from NOAA polar orbiters. This study utilizes composite, partition-of-variance and ...

Ka-Ming Lau; Paul H. Chan

1983-12-01T23:59:59.000Z

277

Decadal Variability of Precipitation over Western North America  

Science Conference Proceedings (OSTI)

Decadal (>7- yr period) variations of precipitation over western North America account for 20%–50% of the variance of annual precipitation. Spatially, the decadal variability is broken into several regional [O(1000 km)] components. These decadal ...

Daniel R. Cayan; Michael D. Dettinger; Henry F. Diaz; Nicholas E. Graham

1998-12-01T23:59:59.000Z

278

Structure of Large-Scale Convective Anomalies over Tropical Oceans  

Science Conference Proceedings (OSTI)

Geographical variations in the variance and cross-correlation of monthly mean sea surface temperature (SST), outgoing longwave radiation (OLR, a proxy for deep convection and vertical motion), and convergence of winds at the surface and at 850 mb ...

David S. Gutzler; Tamara M. Wood

1990-04-01T23:59:59.000Z

279

The Development and Psychometric Modeling of an Embedded Assessment for a Data Modeling and Statistical Reasoning Learning Progression  

E-Print Network (OSTI)

17 EAP/PV Reliabilities byFor this, we look to the EAP/PV reliability coefficient.The EAP/PV reliability is the explained variance according

Schwartz, Robert Andrew

2012-01-01T23:59:59.000Z

280

The Effect of a C02 Laser Pulse Shape on the Accuracy of DIAL Measurements  

Science Conference Proceedings (OSTI)

The temporal pulse shape varies at different wavelengths, within the same wavelength, and between identical lasers. In differential absorption lidar (DIAL) measurements the variance introduced into the deduced average pathlength concentration ...

Avishai Ben-David; Alan P. Force; Francis M. D'Amico; Silvio L. Emery

1992-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "variance stratum stratum3" 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

A Two-Spot Sensor for Measurement of Dissipation by Means of Laser-Doppler Velocimetry  

Science Conference Proceedings (OSTI)

An estimate of the dissipation rate for mechanical energy in a turbulent flow can be obtained by computing the variance of the temporal derivative of the fluid velocity measured at a single point. This technique is not suited to conventional ...

John Trowbridge; Yogi Agrawal

2004-07-01T23:59:59.000Z

282

Edward Epstein's Stochastic-Dynamic Approach to Ensemble Weather Prediction  

Science Conference Proceedings (OSTI)

In the late-1960s, well before the availability of computer power to produce ensemble weather forecasts, Edward Epstein (1931 – 2008) developed a stochastic – dynamic prediction (SDP) method for calculating the temporal evolution of mean value, variance ...

John M. Lewis

283

Quantum-mechanical linear filtering of random signal sequences  

Science Conference Proceedings (OSTI)

The problem of estimating a member of a scalar random signal sequence with quantum-mechanical measurements is considered. The minimum variance linear estimator based on an optimal present quantum measurement and optimal linear processing of past measurements ...

J. Baras; R. Harger; Young Park

1976-01-01T23:59:59.000Z

284

Stochastic-Dynamic Prediction of Three-Dimensional Quasi-Geostrophic Flow  

Science Conference Proceedings (OSTI)

This paper concerns the problem of predicting the variance of a large ensemble of predictions evolving from an ensemble of slightly incorrect initial states, randomly distributed around a “most probable” initial state. Starting with the vorticity ...

Philip D. Thompson

1988-10-01T23:59:59.000Z

285

The Impact of Rapid Wind Variability upon Air–Sea Thermal Coupling  

Science Conference Proceedings (OSTI)

The basic effect of extratropical atmosphere–ocean thermal coupling is to enhance the variance of both anomalous sea surface temperatures (SSTs) and air temperatures (AIRT) due to a decreased energy flux between the atmosphere and ocean, called ...

Philip Sura; Matthew Newman

2008-02-01T23:59:59.000Z

286

Signal Sampling Impacts on HF Radar Wave Measurement  

Science Conference Proceedings (OSTI)

Averaging is required for the measurement of ocean surface wave spectra and parameters with any measurement system in order to reduce the variance in the estimates. Sampling theory for buoy measurements is well known. The same theory can be ...

Lucy R. Wyatt; J. Jim Green; Andrew Middleditch

2009-04-01T23:59:59.000Z

287

Multipath Channels of Unbounded Capacity  

E-Print Network (OSTI)

The capacity of discrete-time, noncoherent, multipath fading channels is considered. It is shown that if the variances of the path gains decay faster than exponentially, then capacity is unbounded in the transmit power.

Koch, Tobias

2008-01-01T23:59:59.000Z

288

Internal Wave Attenuation by Coastal Kelp Stands  

Science Conference Proceedings (OSTI)

Coastal kelp stands are a unique physical environment having high drag distributed throughout the water column. Temperature records from locations at increasing distances into the kelp show a damping of high-frequency variance and a slowing of ...

George A. Jackson

1984-08-01T23:59:59.000Z

289

Reply to “Comments on ‘Searching for Information in 133 Years of California Snowfall Observations’”  

Science Conference Proceedings (OSTI)

Coats raises issues regarding the utility of the snowfall metric presented by Christy in “Searching for information in 133 years of California snowfall observations,” suggesting that variance issues need more attention and that alternative metrics ...

John R. Christy

2013-02-01T23:59:59.000Z

290

A 431-Yr Reconstruction of Western Colorado Snowpack from Tree Rings  

Science Conference Proceedings (OSTI)

A tree-ring-based reconstruction for 1 April snow water equivalent (SWE) is generated for the Gunnison River basin region in western Colorado. The reconstruction explains 63% of the variance in the instrumental record and extends from 1569 to ...

Connie A. Woodhouse

2003-05-01T23:59:59.000Z

291

Practical Considerations in the Use of Rotated Principal Component Analysis (RPCA)in Diagnostic Studies of Upper-Air Height Fields  

Science Conference Proceedings (OSTI)

Rotated principal component analysis (RPCA) is a powerful tool for studying upper air height data because of its ability to distill information about the variance existing in a large number of maps to a much smaller set of physically meaningful ...

Edward A. O'Lenic; Robert E. Livezey

1988-08-01T23:59:59.000Z

292

The Temporal Variability of Soil Moisture and Surface Hydrological Quantities in a Climate Model  

Science Conference Proceedings (OSTI)

The variance budget of land surface hydrological quantities is analyzed in the second Atmospheric Model Intercomparison Project (AMIP2) simulation made with the Canadian Centre for Climate Modelling and Analysis (CCCma) third-generation general ...

Vivek K. Arora; George J. Boer

2006-11-01T23:59:59.000Z

293

A copula-based heuristic for scenario generation  

E-Print Network (OSTI)

Aug 27, 2013 ... The original publication is available at www.springerlink.com. ... always speci ed using the correlation (or variance-covariance) matrix. ... to exist in nancial data (

294

Some thoughts about the Climatic  

E-Print Network (OSTI)

& variance) ­ probability #12;Afforestation has been proposed as a climate mitigation strategy #12;Vegetation and grasslands in mid-latitude with deciduous trees · Equilibrium calculations with the NCAR carbon-climate model

Kammen, Daniel M.

295

Segmenting consumers using smart meter data  

Science Conference Proceedings (OSTI)

Existing electricity market segmentation analysis techniques only make use of limited consumption statistics (usually averages and variances). In this paper we use power demand distributions (PDDs) obtained from fine-grain smart meter data to perform ...

Adrian Albert; Ram Rajagopal; Raffi Sevlian

2011-11-01T23:59:59.000Z

296

Precipitable Water Estimation from High-Resolution Split Window Radiance Measurements  

Science Conference Proceedings (OSTI)

A technique that uses the spatial variance of image brightness temperature to derive total column Precipitable water is applied to high-resolution multispectral aircraft scanner data for the 19 June 1986 COHMEX day. The technique has several ...

Gary J. Jedlovec

1990-09-01T23:59:59.000Z

297

A Comparative Study of Observed Northern Hemisphere Circulation Statistics Based on GFDL and NMC Analyses. Part II: Transient Eddy Statistics and the Energy Cycle  

Science Conference Proceedings (OSTI)

The comparison between two sets of observed circulation statistics undertaken by Lau and Oort (1981) is continued in this study by examining the temporal variance and covariance statistics in these sets. The first (GFDL) set is compiled by ...

Ngar-Cheung Lau; Abraham H. Oort

1982-08-01T23:59:59.000Z

298

Posters  

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

3 3 Posters The Effects of Arctic Stratus Clouds on the Solar Energy Budget in the Atmosphere-Sea Ice-Ocean System Z. Jin and K. Stamnes Geophysical Institute University of Alaska Fairbanks, Alaska B. D. Zak Sandia National Laboratories Albuquerque, New Mexico Radiative Transfer Model We have developed a comprehensive radiative transfer model pertinent to the atmosphere-sea ice-ocean system (Jin and Stamnes 1994; Jin et al., in press). The main features of the newly-developed radiative transfer model include: * The atmosphere, sea ice, and ocean each represented by a sufficient number of layers to resolve the change in the optical properties of each stratum. * An appropriate quadrature structure to take into account the refraction and the total reflection at the air-ice or air-

299

Fuel injector system  

DOE Patents (OSTI)

A fuel injection system particularly adapted for injecting coal slurry fuels at high pressures includes an accumulator-type fuel injector which utilizes high-pressure pilot fuel as a purging fluid to prevent hard particles in the fuel from impeding the opening and closing movement of a needle valve, and as a hydraulic medium to hold the needle valve in its closed position. A fluid passage in the injector delivers an appropriately small amount of the ignition-aiding pilot fuel to an appropriate region of a chamber in the injector's nozzle so that at the beginning of each injection interval the first stratum of fuel to be discharged consists essentially of pilot fuel and thereafter mostly slurry fuel is injected.

Hsu, Bertrand D. (Erie, PA); Leonard, Gary L. (Schenctady, NY)

1988-01-01T23:59:59.000Z

300

Interpretation of Geoelectric Structure at Hululais Prospect Area, South Sumatra  

DOE Green Energy (OSTI)

Schlumberger resistivity surveys were conducted in 1993 as part of a combined geological, geophysical and geological program to investigate a geothermal prospect in the Hululais area, Southern Sumatra. These resistivity data resolved the upper conductive layer and were interpreted to define the shallow extent of a possible geothermal system. A follow-up magnetotelluric (MT) survey was carried out to probe deeper than the dc resistivity survey results achieved. However, the resistive sub-stratum below the conductive layer was still poorly resolved. Possible reasons for this include a preferential channeling of the telluric current within the thick shallow very conductive layer, thus limiting the penetration depth of the magnetotelluric signals and poor resolution due to high noise levels caused by significant rain and sferics.

Mulyadi

1995-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "variance stratum stratum3" 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.


301

Mathematical Modeling to Study the Dynamics of A Diatomic Molecule N2 in Water  

E-Print Network (OSTI)

In the present work an attempt has been made to study the dynamics of a diatomic molecule N2 in water. The proposed model consists of Langevin stochastic differential equation whose solution is obtained through Euler's method. The proposed work has been concluded by studying the behavior of statistical parameters like variance in position, variance in velocity and covariance between position and velocity. This model incorporates the important parameters like acceleration, intermolecular force, frictional force and random force.

Sharma, Nitin

2010-01-01T23:59:59.000Z

302

Noise Suppression and Spectral Decomposition for State-Dependent Noise  

E-Print Network (OSTI)

2 (Xk) + 2 (Xk) , (58) the sum of the variance of H(Xk) and the average variance of the added white the underlying state to fluctuate [J. M. G. Vilar and J. M. Rub´i, Phys. Rev. Lett. 86, 950 (2001)]. This paper conduction discussed in the original paper by Vilar and Rub´i. PACS numbers: 05.40.Ca, 05.45.Tp, 02.70.Hm

Walton, Brian

303

Statistical issues in Mendelian randomization: use of genetic instrumental variables for assessing causal associations  

E-Print Network (OSTI)

); covariate for Y (Chapters 4 and 6) G instrumental variable ? parameter of genetic association: regression parameter in the G-X re- gression ? regression parameter in the X-Y regression ?1 causal effect of X on Y : the main parameter of interest ? parameter... of genetic association for haplotypes: regression parameter in the G-X regression where G represents a haplotype or diplotype ? correlation parameter ?2 variance parameter ? 2 between-study heterogeneity variance parameter ?2 genetic between...

Burgess, Stephen

2012-03-06T23:59:59.000Z

304

Impact on the steam electric power industry of deleting Section 316(a) of the Clean Water Act: Capital costs  

Science Conference Proceedings (OSTI)

Many power plants discharge large volumes of cooling water. In some cases, the temperature of the discharge exceeds state thermal requirements. Section 316(a) of the Clean Water Act (CWA) allows a thermal discharger to demonstrate that less stringent thermal effluent limitations would still protect aquatic life. About 32% of total US steam electric generating capacity operates under Section 316(a) variances. In 1991, the US Senate proposed legislation that would delete Section 316(a) from the CWA. This study, presented in two companion reports, examines how this legislation would affect the steam electric power industry. This report describes alternatives available to nuclear and coal-fired plants currently operating under variances. Data from 38 plants representing 14 companies are used to estimate the national cost of implementing such alternatives. Although there are other alternatives, most affected plants would be retrofitted with cooling towers. Assuming that all plants currently operating under variances would install cooling towers, the national capital cost estimate for these retrofits ranges from $22.7 billion to $24.4 billion (in 1992 dollars). The second report quantitatively and qualitatively evaluates the energy and environmental impacts of deleting the variance. Little justification has been found for removing the Section 316(a) variance from the CWA.

Veil, J.A.

1993-01-01T23:59:59.000Z

305

Impact on the steam electric power industry of deleting Section 316(a) of the Clean Water Act: Energy and environmental impacts  

Science Conference Proceedings (OSTI)

Many power plants discharge large volumes of cooling water. In some cases, the temperature of the discharge exceeds state thermal requirements. Section 316(a) of the Clean Water Act (CWA) allows a thermal discharger to demonstrate that less stringent thermal effluent limitations would still protect aquatic life. About 32% of the total steam electric generating capacity in the United States operates under Section 316(a) variances. In 1991, the US Senate proposed legislation that would delete Section 316(a) from the CWA. This study, presented in two companion reports, examines how this legislation would affect the steam electric power industry. This report quantitatively and qualitatively evaluates the energy and environmental impacts of deleting the variance. No evidence exists that Section 316(a) variances have caused any widespread environmental problems. Conversion from once-through cooling to cooling towers would result in a loss of plant output of 14.7-23.7 billion kilowatt-hours. The cost to make up the lost energy is estimated at $12.8-$23.7 billion (in 1992 dollars). Conversion to cooling towers would increase emission of pollutants to the atmosphere and water loss through evaporation. The second report describes alternatives available to plants that currently operate under the variance and estimates the national cost of implementing such alternatives. Little justification has been found for removing the 316(a) variance from the CWA.

Veil, J.A.; VanKuiken, J.C.; Folga, S.; Gillette, J.L.

1993-01-01T23:59:59.000Z

306

Currency Crises and Uncertainty About Fundamentals. IMF Working Paper 02/3  

E-Print Network (OSTI)

This paper studies the role of uncertainty about fundamentals in currency crises from both a theoretical and an empirical perspective. We Þnd evidence — based on a monthly dataset of Consensus forecasts for six Asian countries in the period January 1995- May 2001 — conÞrming the theoretical predictions (from both unique- and multipleequilibria models) that: i) speculative attacks depend not only on actual and expected fundamentals but also on the variance of speculators’ expectations about them; ii) thesignoftheeffect of the variance depends on whether expected fundamentals are “good ” or “bad. ” These results are robust to the deÞnition of exchange rate pressure indices, the estimation sample (pre-crisis vs. full sample), the method chosen to avoid spurious correlations, and possible time-varying coefficients for the mean, the variance, and the threshold separating good from bad expected fundamentals.

Alessandro Prati; Massimo Sbracia; Bianca Bucci; Rosanna Gattodoro; Ra Liccardi

2002-01-01T23:59:59.000Z

307

Seismic attribute analyses of lower Permian (Wolfcampian-Leonardian) carbonate buildups, SW Midland, Texas  

E-Print Network (OSTI)

A trend of Wolfcampian-Leonardian carbonate buildups is located in the southwestern Midland Basin, Upton County, Texas. The buildup trend is located east of the eastern faulted margin of the Central Basin Platform and north of the Ozona Arch. Carbonate deposition began during lowstand times, within or just below wave base. In the Southwestern Midland Basin, the Wolfcampian-Leonardian carbonate interval is lithologically heterogeneous due to the presence of abundant lithoclastic debris that was shed from the uplifted Central Basin Platform. The lithologic heterogeneity makes it difficult to identify the buildups on seismic profiles. Several inferred buildups have been drilled in the past, but many boreholes only penetrated lithoclastic facies, not true buildup facies. Analyses of various seismic attributes were conducted for the Wolfcampian-Leonardian interval in the SW Midland Basin in an attempt to improve the recognition and imaging of the carbonate buildups. The objective was to identify a set of attributes that directly indicate the buildup locations. After extensive trial of various attributes, the variance attribute was selected as the optimum seismic attribute. The resultant 3D variance volume was used to detect the buildup locations, and some aspects of their internal stratigraphy, and to establish the fault framework in the Amacker survey. The instantaneous frequency attribute, combined with the variance attribute was also marginally useful for imaging the buildups. The variance attribute and instantaneous frequency were compared. Images generated from the variance attribute are better than those generated using the instantaneous frequency because on these images, it is possible to localize the buildups. The instantaneous frequency attribute combined with the variance attribute allows recognition of lithologic heterogeneities inside the buildup interval.

Decalf, Carole Christiane

2001-01-01T23:59:59.000Z

308

Multiplicative cascades and seismicity in natural time  

Science Conference Proceedings (OSTI)

Natural time chi enables the distinction of two origins of self-similarity, i.e., the process memory and the process increments infinite variance. Employing multiplicative cascades in natural time, the most probable value of the variance kappa{sub 1}(ident to-{sup 2}) is explicitly related with the parameter b of the Gutenberg-Richter law of randomly shuffled earthquake data. Moreover, the existence of temporal and magnitude correlations is studied in the original earthquake data. Magnitude correlations are larger for closer in time earthquakes, when the maximum interoccurrence time varies from half a day to 1 min.

Sarlis, N. V.; Skordas, E. S.; Varotsos, P. A. [Department of Physics, Solid State Section and Solid Earth Physics Institute, University of Athens, Panepistimiopolis, Zografos, 157 84 Athens (Greece)

2009-08-15T23:59:59.000Z

309

Bayesian Inference in Asset Pricing Tests  

E-Print Network (OSTI)

We test the mean-variance efficiency of a given portfolio using a Bayesian framework. Our test is more direct than Shanken's (1987b), because we impose a prior on all the parameters of the multivariate regression model. The approach is also easily adapted to other problems. We use Monte Carlo numerical integration to accurately evaluate 9O-dimensional integrals. Posteriorodds ratios are calculated for 12 industry portfolios from 1926-1987. The sensitivity of the inferences to the prior is investigated by using three different distributions. The probability that the given portfolio is mean-variance efficient is small for a range of plausible priors.

Campbell R. Harvey; Guofu Zhou

1990-01-01T23:59:59.000Z

310

Toward Joint Hypothesis-Tests Seismic Event Screening Analysis: Ms|mb and Event Depth  

SciTech Connect

Well established theory can be used to combine single-phenomenology hypothesis tests into a multi-phenomenology event screening hypothesis test (Fisher's and Tippett's tests). Commonly used standard error in Ms:mb event screening hypothesis test is not fully consistent with physical basis. Improved standard error - Better agreement with physical basis, and correctly partitions error to include Model Error as a component of variance, correctly reduces station noise variance through network averaging. For 2009 DPRK test - Commonly used standard error 'rejects' H0 even with better scaling slope ({beta} = 1, Selby et al.), improved standard error 'fails to rejects' H0.

Anderson, Dale [Los Alamos National Laboratory; Selby, Neil [AWE Blacknest

2012-08-14T23:59:59.000Z

311

STATISTICAL ANALYSIS OF TANK 5 FLOOR SAMPLE RESULTS  

SciTech Connect

Sampling has been completed for the characterization of the residual material on the floor of Tank 5 in the F?Area Tank Farm at the Savannah River Site (SRS), near Aiken, SC. The sampling was performed by Savannah River Remediation (SRR) LLC using a stratified random sampling plan with volume?proportional compositing. The plan consisted of partitioning the residual material on the floor of Tank 5 into three non?overlapping strata: two strata enclosed accumulations, and a third stratum consisted of a thin layer of material outside the regions of the two accumulations. Each of three composite samples was constructed from five primary sample locations of residual material on the floor of Tank 5. Three of the primary samples were obtained from the stratum containing the thin layer of material, and one primary sample was obtained from each of the two strata containing an accumulation. This report documents the statistical analyses of the analytical results for the composite samples. The objective of the analysis is to determine the mean concentrations and upper 95% confidence (UCL95) bounds for the mean concentrations for a set of analytes in the tank residuals. The statistical procedures employed in the analyses were consistent with the Environmental Protection Agency (EPA) technical guidance by Singh and others [2010]. Savannah River National Laboratory (SRNL) measured the sample bulk density, nonvolatile beta, gross alpha, and the radionuclide1, elemental, and chemical concentrations three times for each of the composite samples. The analyte concentration data were partitioned into three separate groups for further analysis: analytes with every measurement above their minimum detectable concentrations (MDCs), analytes with no measurements above their MDCs, and analytes with a mixture of some measurement results above and below their MDCs. The means, standard deviations, and UCL95s were computed for the analytes in the two groups that had at least some measurements above their MDCs. The identification of distributions and the selection of UCL95 procedures generally followed the protocol in Singh, Armbya, and Singh [2010]. When all of an analyte’s measurements lie below their MDCs, only a summary of the MDCs can be provided. The measurement results reported by SRNL are listed in Appendix A, and the results of this analysis are reported in Appendix B. The data were generally found to follow a normal distribution, and to be homogenous across composite samples.

Shine, G.

2012-08-03T23:59:59.000Z

312

STATISTICAL ANALYSIS OF TANK 5 FLOOR SAMPLE RESULTS  

SciTech Connect

Sampling has been completed for the characterization of the residual material on the floor of Tank 5 in the F?Area Tank Farm at the Savannah River Site (SRS), near Aiken, SC. The sampling was performed by Savannah River Remediation (SRR) LLC using a stratified random sampling plan with volume?proportional compositing. The plan consisted of partitioning the residual material on the floor of Tank 5 into three non?overlapping strata: two strata enclosed accumulations, and a third stratum consisted of a thin layer of material outside the regions of the two accumulations. Each of three composite samples was constructed from five primary sample locations of residual material on the floor of Tank 5. Three of the primary samples were obtained from the stratum containing the thin layer of material, and one primary sample was obtained from each of the two strata containing an accumulation. This report documents the statistical analyses of the analytical results for the composite samples. The objective of the analysis is to determine the mean concentrations and upper 95% confidence (UCL95) bounds for the mean concentrations for a set of analytes in the tank residuals. The statistical procedures employed in the analyses were consistent with the Environmental Protection Agency (EPA) technical guidance by Singh and others [2010]. Savannah River National Laboratory (SRNL) measured the sample bulk density, nonvolatile beta, gross alpha, and the radionuclide, elemental, and chemical concentrations three times for each of the composite samples. The analyte concentration data were partitioned into three separate groups for further analysis: analytes with every measurement above their minimum detectable concentrations (MDCs), analytes with no measurements above their MDCs, and analytes with a mixture of some measurement results above and below their MDCs. The means, standard deviations, and UCL95s were computed for the analytes in the two groups that had at least some measurements above their MDCs. The identification of distributions and the selection of UCL95 procedures generally followed the protocol in Singh, Armbya, and Singh [2010]. When all of an analyte’s measurements lie below their MDCs, only a summary of the MDCs can be provided. The measurement results reported by SRNL are listed in Appendix A, and the results of this analysis are reported in Appendix B. The data were generally found to follow a normal distribution, and to be homogenous across composite samples.

Shine, E.

2012-08-01T23:59:59.000Z

313

STATISTICAL ANALYSIS OF TANK 5 FLOOR SAMPLE RESULTS  

Science Conference Proceedings (OSTI)

Sampling has been completed for the characterization of the residual material on the floor of Tank 5 in the F-Area Tank Farm at the Savannah River Site (SRS), near Aiken, SC. The sampling was performed by Savannah River Remediation (SRR) LLC using a stratified random sampling plan with volume-proportional compositing. The plan consisted of partitioning the residual material on the floor of Tank 5 into three non-overlapping strata: two strata enclosed accumulations, and a third stratum consisted of a thin layer of material outside the regions of the two accumulations. Each of three composite samples was constructed from five primary sample locations of residual material on the floor of Tank 5. Three of the primary samples were obtained from the stratum containing the thin layer of material, and one primary sample was obtained from each of the two strata containing an accumulation. This report documents the statistical analyses of the analytical results for the composite samples. The objective of the analysis is to determine the mean concentrations and upper 95% confidence (UCL95) bounds for the mean concentrations for a set of analytes in the tank residuals. The statistical procedures employed in the analyses were consistent with the Environmental Protection Agency (EPA) technical guidance by Singh and others [2010]. Savannah River National Laboratory (SRNL) measured the sample bulk density, nonvolatile beta, gross alpha, radionuclide, inorganic, and anion concentrations three times for each of the composite samples. The analyte concentration data were partitioned into three separate groups for further analysis: analytes with every measurement above their minimum detectable concentrations (MDCs), analytes with no measurements above their MDCs, and analytes with a mixture of some measurement results above and below their MDCs. The means, standard deviations, and UCL95s were computed for the analytes in the two groups that had at least some measurements above their MDCs. The identification of distributions and the selection of UCL95 procedures generally followed the protocol in Singh, Armbya, and Singh [2010]. When all of an analyte's measurements lie below their MDCs, only a summary of the MDCs can be provided. The measurement results reported by SRNL are listed in Appendix A, and the results of this analysis are reported in Appendix B. The data were generally found to follow a normal distribution, and to be homogeneous across composite samples.

Shine, E.

2012-03-14T23:59:59.000Z

314

Statistical Analysis Of Tank 5 Floor Sample Results  

Science Conference Proceedings (OSTI)

Sampling has been completed for the characterization of the residual material on the floor of Tank 5 in the F-Area Tank Farm at the Savannah River Site (SRS), near Aiken, SC. The sampling was performed by Savannah River Remediation (SRR) LLC using a stratified random sampling plan with volume-proportional compositing. The plan consisted of partitioning the residual material on the floor of Tank 5 into three non-overlapping strata: two strata enclosed accumulations, and a third stratum consisted of a thin layer of material outside the regions of the two accumulations. Each of three composite samples was constructed from five primary sample locations of residual material on the floor of Tank 5. Three of the primary samples were obtained from the stratum containing the thin layer of material, and one primary sample was obtained from each of the two strata containing an accumulation. This report documents the statistical analyses of the analytical results for the composite samples. The objective of the analysis is to determine the mean concentrations and upper 95% confidence (UCL95) bounds for the mean concentrations for a set of analytes in the tank residuals. The statistical procedures employed in the analyses were consistent with the Environmental Protection Agency (EPA) technical guidance by Singh and others [2010]. Savannah River National Laboratory (SRNL) measured the sample bulk density, nonvolatile beta, gross alpha, and the radionuclide, elemental, and chemical concentrations three times for each of the composite samples. The analyte concentration data were partitioned into three separate groups for further analysis: analytes with every measurement above their minimum detectable concentrations (MDCs), analytes with no measurements above their MDCs, and analytes with a mixture of some measurement results above and below their MDCs. The means, standard deviations, and UCL95s were computed for the analytes in the two groups that had at least some measurements above their MDCs. The identification of distributions and the selection of UCL95 procedures generally followed the protocol in Singh, Armbya, and Singh [2010]. When all of an analyte's measurements lie below their MDCs, only a summary of the MDCs can be provided. The measurement results reported by SRNL are listed in Appendix A, and the results of this analysis are reported in Appendix B. The data were generally found to follow a normal distribution, and to be homogenous across composite samples.

Shine, E. P.

2012-08-01T23:59:59.000Z

315

FY 2007 Report on Uncosted Balances  

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

Report on Uncosted Balances Report on Uncosted Balances For Fiscal Year Ended September 30,2007 August 2008 Prepared by: Office of the Chief Financial Officer TABLE OF CONTENTS Purpose.. . . . : . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .. . .. . .. . . . . . . . , . . , . , , . . . . , Executive Summary ... . . . .. . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . .... .. .... .... .. Threshold Analysis - Approach and Background ................... . .... .. Composition of FY 2007 Year-End Uncosted Obligations ..... .. . . . . . Explanation of Significant Threshold Variances ... ... .. . . . . . .. . .. .. . . . . . List of Acronyms.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

316

Interdecadal Variability of the Relationship between the Indian Ocean Zonal Mode and East African Coastal Rainfall Anomalies  

Science Conference Proceedings (OSTI)

The variance of the rainfall during the October–November–December (OND) “short rain” season along the coast in Kenya and Tanzania correlates strongly with sea surface temperature (SST) in the Indian Ocean between 1950 and 1999. A zonal pattern of ...

Christina Oelfke Clark; Peter J. Webster; Julia E. Cole

2003-02-01T23:59:59.000Z

317

Multi-element probabilistic collocation method in high dimensions  

Science Conference Proceedings (OSTI)

We combine multi-element polynomial chaos with analysis of variance (ANOVA) functional decomposition to enhance the convergence rate of polynomial chaos in high dimensions and in problems with low stochastic regularity. Specifically, we employ the multi-element ... Keywords: Domain decomposition, Sparse grids, Stochastic partial differential equations

Jasmine Foo; George Em Karniadakis

2010-03-01T23:59:59.000Z

318

Latin-square three-dimensional gage master  

DOE Patents (OSTI)

A gage master for coordinate measuring machines has an nxn array of objects distributed in the Z coordinate utilizing the concept of a Latin square experimental design. Using analysis of variance techniques, the invention may be used to identify sources of error in machine geometry and quantify machine accuracy.

Jones, L.

1981-05-12T23:59:59.000Z

319

Errors of Atlantic Air–Sea Fluxes Derived from Ship Observations  

Science Conference Proceedings (OSTI)

Using individual ship reports of the Comprehensive Ocean–Atmosphere Data Set (COADS) monthly 1° × 1° averages of the air–sea flux fields in the Atlantic are computed to investigate the variance on a seasonal-to-interannual timescale. As an ...

R. Lindau

2003-02-01T23:59:59.000Z

320

Many-objective de Novo water supply portfolio planning under deep uncertainty  

Science Conference Proceedings (OSTI)

This paper proposes and demonstrates a new interactive framework for sensitivity-informed de Novo planning to confront the deep uncertainty within water management problems. The framework couples global sensitivity analysis using Sobol' variance decomposition ... Keywords: Decision support, Many-objective decision analytics, Multiobjective evolutionary algorithms, Risk, Robust decision making, Sensitivity analysis, Uncertainty

Joseph R. Kasprzyk; Patrick M. Reed; Gregory W. Characklis; Brian R. Kirsch

2012-06-01T23:59:59.000Z

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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.


321

www.sciencemag.org SCIENCE VOL 325 28 AUGUST 2009 1079 PERSPECTIVES  

E-Print Network (OSTI)

, such as cranked Nilsson­Strutinsky calculations, Vampir calculations, projection shell model and shell model computer. Beyond this dimensions, we use energy variance extrapolation method, the details are given 17 3 5 7 9 11 13 15 17 7 9 11 6 8 10 12 Ex.energy[MeV] 19 21 (23) 19 19 21 23 Fig. 1. Experimental

Connolly Jr, Harold C.

322

THE BAHADUR EFFICIENCY FOR ENERGY DETECTION OF STATIONARY GAUSSIAN PROCESSES  

E-Print Network (OSTI)

validates our asymptotic analysis in the finite sample regime. Index Terms- Energy detection, Bahadur is not optimal in gen- eral. Thus, the analysis of the loss or limitation of energy detec- tion compared of energy detection with noise variance uncertainty [3]. In particular, the analysis of per- formance loss

Sung, Youngchul

323

Model updating of a dynamic system in a high-temperature environment based on a hierarchical method  

Science Conference Proceedings (OSTI)

In the past, structural model updating methods have been widely researched as a means to reconcile mathematical models because the key parameters in dynamic systems often change during their life cycle due to repair and replacement of parts or the environment. ... Keywords: Analysis variance, FE model updating, Genetic algorithm, Hierarchical, High temperature, RBF predictor

He Cheng, Chen Guoping, He Huan, Sun Rujie

2013-12-01T23:59:59.000Z

324

Energy Factors, Leasing Structure and the Market Price of Office Buildings in the U.S.  

E-Print Network (OSTI)

Yes prices per square foot indicating that the cost effectper square foot and more variance in precipitation has a statistically significant positive effect on operating costsper square foot of office buildings that sold in arm-length-transactions between 2001 and 2010 on energy costs,

Jaffee, Dwight; Stanton, Richard; Wallace, Nancy

2012-01-01T23:59:59.000Z

325

Commentary---On the Interpretation of Temporal Inflation Parameters in Stochastic Models of Judgment and Choice  

Science Conference Proceedings (OSTI)

The implications of Salisbury and Feinberg's (2010) paper [Salisbury, L. C., F. M. Feinberg. 2010. Alleviating the constant stochastic variance assumption in decision research: Theory, measurement, and experimental test. Marketing Sci.29(1) ... Keywords: behavioral decision theory, behavioral economics, choice modeling, intertemporal choice, measurement and inference, psychological process models, random utility models

J. Wesley Hutchinson; Gal Zauberman; Robert Meyer

2010-01-01T23:59:59.000Z

326

Regime Transitions in a Stochastically Forced Double-Gyre Model  

Science Conference Proceedings (OSTI)

A reduced-gravity double-gyre ocean model is used to study the influence of an additive stochastic wind stress component on the regime behavior of the wind-driven circulation. The variance of the stochastic component (spatially coherent white ...

Philip Sura; Klaus Fraedrich; Frank Lunkeit

2001-02-01T23:59:59.000Z

327

Estimation of turbulence level and scale for wind turbine applications  

DOE Green Energy (OSTI)

A simplified method is presented for estimating onsite turbulence variance within the wind turbine layer for horizontal wind speed. The method is based principally on estimating the probability distribution of wind speed and assigning a variance to each mean wind speed based on surface roughness estimates. The model is not proposed as an alternative to onsite measurement and analysis, but rather as an adjunct to such a program. A revision of the Kaimal neutral u-component spectrum is suggested to apply to the mix of the stabilities occurring during operational winds. Values of integral length scale calculated from data analysis are shown to contradict the length scale model implicit in turbulence power spectra. Also, these calculated values are shown to be extremely sensitive to the length of the time series and the detrending method used. The analysis and modeling are extended to the rotational frame of reference for a horizontal-axis wind turbine by modeling the ratios of harmonic spike variances (1P, 2P, etc.) in the rotational spectrum to the Eulerian turbulence variance. 15 refs., 11 figs., 3 tabs.

Powell, D.C.

1988-11-01T23:59:59.000Z

328

Analysis of Darwin Rainfall Data: Implications on Sampling Strategy  

Science Conference Proceedings (OSTI)

Rainfall data collected by radar in the vicinity of Darwin, Australia, have been analysed in terms of their mean, variance, autocorrelation of area-averaged rain rate, and diurnal variation. It is found that, when compared with the well-studied ...

Qihang Li; Rafael L. Bras; Daniele Veneziano

1996-03-01T23:59:59.000Z

329

Context and profile based cascade classifier for efficient people detection and safety care system  

Science Conference Proceedings (OSTI)

This study propose a system of extracting and tracking objects for a multimedia system and addresses how to extract the head feature from an object area. It is observed in images taken from real-time records like a video, there is always a variance in ... Keywords: Context-awareness, Feature selection, Human detection, Tracking

Kang-Dae Lee; Mi Young Nam; Kyung-Yong Chung; Young-Ho Lee; Un-Gu Kang

2013-03-01T23:59:59.000Z

330

CONSTRAINED MINIMUM ENTROPY AND MAXIMUM NEGENTROPY BLIND DECONVOLUTION AND EQUALIZATION  

E-Print Network (OSTI)

CONSTRAINED MINIMUM ENTROPY AND MAXIMUM NEGENTROPY BLIND DECONVOLUTION AND EQUALIZATION Seungjin on the variance of decon­ volved signal. We also consider the maximum negen­ tropy principle and show that the CME version, without any prior knowledge (such as channel impulse response, training data). As the demand

Choi, Seungjin

331

New Equipment of Distinguishing Rock from Coal Based on Statistical Analysis of Fast Fourier Transform  

Science Conference Proceedings (OSTI)

A new equipment of distinguishing rock from coal based on statistical analysis of Fast Fourier Transform (FFT) is invented which can be used in the mechanized caving coal locales. First, eight groups of sound signals which had been measured during caving ... Keywords: Threshold of Distinguishing Rock from Coal, Fast Fourier Transform (FFT), Frequency Energy Variance, Frequency Energy Ratio

Gu Tao; Li Xu

2009-05-01T23:59:59.000Z

332

Greedy solutions for the construction of sparse spatial and spatio-spectral filters in brain computer interface applications  

Science Conference Proceedings (OSTI)

In the original formulation of common spatial pattern (CSP), all recording channels are combined when extracting the variance as input features for a brain computer interface (BCI). This results in overfitting and robustness problems of the constructed ... Keywords: Brain computer interface, Common spatial pattern, Greedy search, Sparse

Fikri Goksu; Nuri F. Ince; Ahmed H. Tewfik

2013-05-01T23:59:59.000Z

333

OUTLIER COMPENSATION IN SENSOR NETWORK SELF-LOCALIZATION VIA THE EM Joshua N. Ash, Randolph L. Moses  

E-Print Network (OSTI)

OUTLIER COMPENSATION IN SENSOR NETWORK SELF-LOCALIZATION VIA THE EM ALGORITHM Joshua N. Ash 43210 ABSTRACT Self-localization is an important component of distributed sensor systems. The presence- mates of the sensor locations [4]. Outliers are inherently handled by including a high variance

Moses, Randolph L.

334

Efficient tail estimation for massive correlated log-normal sums: with applications in statistical leakage analysis  

Science Conference Proceedings (OSTI)

Existing approaches to statistical leakage analysis focus only on calculating the mean and variance of the total leakage. In practice, however, what concerns most is the tail behavior of the sum distribution, as it tells that to what extent the design ... Keywords: comonotonicity, fast correlation transform, statistical leakage analysis, tail behavior

Mingzhi Gao; Zuochang Ye; Yan Wang; Zhiping Yu

2010-06-01T23:59:59.000Z

335

Optimal approximations for risk measures of sums of lognormals based on conditional expectations  

Science Conference Proceedings (OSTI)

In this paper we investigate the approximations for the distribution function of a sum S of lognormal random variables. These approximations are obtained by considering the conditional expectation E[S|@L] of S with respect to a conditioning random variable ... Keywords: Comonotonicity, Conditional expectation, Jensen's inequality, Lognormal, Maximal variance

S. Vanduffel; X. Chen; J. Dhaene; M. Goovaerts; L. Henrard; R. Kaas

2008-11-01T23:59:59.000Z

336

Mixed Layer Lateral Eddy Fluxes Mediated by Air–Sea Interaction  

Science Conference Proceedings (OSTI)

The modulation of air–sea heat fluxes by geostrophic eddies due to the stirring of temperature at the sea surface is discussed and quantified. It is argued that the damping of eddy temperature variance by such air–sea fluxes enhances the ...

Emily Shuckburgh; Guillaume Maze; David Ferreira; John Marshall; Helen Jones; Chris Hill

2011-01-01T23:59:59.000Z

337

Combining quasi and empirical likelihoods in generalized linear models with missing responses  

Science Conference Proceedings (OSTI)

By only specifying the conditional mean and variance functions of the response variable given covariates, the quasi-likelihood can produce valid semiparametric inference for regression parameter in generalized linear models (GLMs). However, in many studies, ... Keywords: 62F12, 62F30, 62G10, Auxiliary information, Combined quasi and empirical likelihood, Generalized linear models, Missing responses, Wilks' theorem

Tianqing Liu; Xiaohui Yuan

2012-10-01T23:59:59.000Z

338

Projection-pursuit approach to robust linear discriminant analysis  

Science Conference Proceedings (OSTI)

Discriminant analysis plays an important role in multivariate statistics as a prediction and classification method. It has been successfully applied in many fields of work and research. As it happens with other multivariate methods, discriminant analysis ... Keywords: 62G35, 62H30, 62P10, Asymptotic variance, High-dimensional data, Influence function, Linear discriminant analysis, Microarray data, Projection-pursuit, Robustness

Ana M. Pires; João A. Branco

2010-11-01T23:59:59.000Z

339

Testing model assumptions in functional regression models  

Science Conference Proceedings (OSTI)

In the functional regression model where the responses are curves, new tests for the functional form of the regression and the variance function are proposed, which are based on a stochastic process estimating L^2-distances. Our approach avoids the explicit ... Keywords: 62G10, Functional data, Goodness-of-fit tests, Parametric bootstrap, Tests for heteroscedasticity

Axel Bücher; Holger Dette; Gabriele Wieczorek

2011-11-01T23:59:59.000Z

340

Draft Umatilla/Willow Subbasin Plan May 28, 2004 Appendix H Research, Monitoring, and Evaluation H-1  

E-Print Network (OSTI)

user biometrics Example: It is easier to write a program that learns to play checkers or backgammon;21 Example of applicaWons Time series predicWon: predicWng electricity load, network usage, stock market: Expensive (need to train N models) High variance #12;34 kfold Cross ValidaWon Randomly parWWon the dataset

Note: This page contains sample records for the topic "variance stratum stratum3" 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

A SAS® macro implementation of a multiple comparison post hoc test for a Kruskal-Wallis analysis  

Science Conference Proceedings (OSTI)

The Kruskal-Wallis (KW) nonparametric analysis of variance is often used instead of a standard one-way ANOVA when data are from a suspected non-normal population. The KW omnibus procedure tests for some differences between groups, but provides no specific ... Keywords: Dunn's test, Kruskal-Wallis, Multiple comparison, Nemenyi test, Nonparametric, SAS

Alan C. Elliott; Linda S. Hynan

2011-04-01T23:59:59.000Z

342

SEQUENTIAL ORDER UNDER MA ALAN DOW  

E-Print Network (OSTI)

system t* *his sequence of random variables is tight (as N varies), while for the non-interacting parti.1)), and that b 6= 0. a) The sequence ( k(f))k~1is tight (or, bounded in probability). b) If further f variances ~oe2n;sand ~oe2n; furthermore, (3.27) and (3.28) and ff

Dow, Alan

343

IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 25, NO. 10, OCTOBER 2010 2531 Maximum Power Point Tracking for Photovoltaic  

E-Print Network (OSTI)

a maximum power point track- ing algorithm that optimizes solar array performance and adapts to rapidly the natural inverter ripple is designed and tested on a simulated solar array with a grid-tied inverter-variance irradiance data gathered on a rooftop array experiment in Princeton, NJ. The ES controller achieves

Kulkarni, Sanjeev

344

Explanatory Business Analytics in OLAP  

Science Conference Proceedings (OSTI)

In this paper the authors describe a method to integrate explanatory business analytics in OLAP information systems. This method supports the discovery of exceptional values in OLAP data and the explanation of such values by giving their underlying causes. ... Keywords: Business Analytics, Exception Reporting, Explanation, OLAP, Variance Analysis

Emiel Caron, Hennie Daniels

2013-07-01T23:59:59.000Z

345

MicroSoar: A New Instrument for Measuring Microscale Turbulence from Rapidly Moving Submerged Platforms  

Science Conference Proceedings (OSTI)

A new high-frequency turbulence measuring instrument, MicroSoar, has been developed, tested, and used to make scalar variance dissipation rate measurements. MicroSoar was mounted on the undercarriage of SeaSoar, a depth-programmable winged ...

T. M. Dillon; J. A. Barth; A. Y. Erofeev; G. H. May; H. W. Wijesekera

2003-11-01T23:59:59.000Z

346

Building performance evaluation and certification in the UK  

E-Print Network (OSTI)

for a reliable measurement and verification system was demonstrated in the US through an analysis of the wide variance of energy and carbon performance of buildings under the LEED programme. In a study by Wedding and Brown (2007, 2008) it was found...

Kelly, Scott; Pollitt, Michael G.; Crawford Brown, Doug

2012-10-04T23:59:59.000Z

347

Measurement of Vertical Kinetic Energy and Vertical Velocity Skewness in Oceanic Boundary Layers by Imperfectly Lagrangian Floats  

Science Conference Proceedings (OSTI)

The effects of upward buoyancy on the accuracy with which Lagrangian floats can measure the Eulerian mean variance wwE and skewness SwE of vertical fluid velocity w in the wind-driven upper-ocean boundary layer is investigated using both ...

Ramsey R. Harcourt; Eric A. D’Asaro

2010-11-01T23:59:59.000Z

348

Statistical modeling of root geometrical dimensions of gas turbine blade in creep feed grinding process  

Science Conference Proceedings (OSTI)

Creep feed grinding is widely used in manufacturing suppe-ralloy materials. The main objectives of this research deal with the influences of major process parameters and their interactions of creep feed grinding process such as wheel speed, workpiece ... Keywords: analysis of variance, creep feed grinding, interactive effect, regression, root geometrical dimensions

A. R. Fazeli Nahrekhalaji

2010-04-01T23:59:59.000Z

349

Investigation of effective parameters on the traverse of root of the gas turbine blade by design of experiments  

Science Conference Proceedings (OSTI)

Creep feed grinding is widely used in manufacturing suppe-ralloy materials. The main objectives of this research deal with the influences of major process parameters and their interactions of creep feed grinding process such as wheel speed, workpiece ... Keywords: analysis of variance, creep feed grinding, interactive effect, regression, traverse

A. R. Fazeli Nahrekhalaji

2010-04-01T23:59:59.000Z

350

Multilevel splitting for reachability analysis of stochastic hybrid systems  

Science Conference Proceedings (OSTI)

Biochemical research is increasingly using formal modeling, simulation, and analysis methods to improve the understanding of complex systems. Probabilistic analysis techniques such as Monte Carlo methods can be used to determine reachability or safety ... Keywords: Monte Carlo, stochastic hybrid systems, variance reduction

Derek Riley; Xenofon Koutsoukos; Kasandra Riley

2010-07-01T23:59:59.000Z

351

A novel approach to determine normal variation in gene expression data  

Science Conference Proceedings (OSTI)

Animal models for human diseases are of crucial importance for studying gene expression and regulation. In the last decade the development of mouse models for cancer, diabetes, neuro-degenerative and many other diseases has been on steady rise. Microarray ... Keywords: gene expression, hypertension, immune response, mouse models, normal variance, principal component analysis, replicates

Vinay Nadimpally; Mohammed J. Zaki

2003-12-01T23:59:59.000Z

352

Research Article: Effective sample size: Quick estimation of the effect of related samples in genetic case-control association analyses  

Science Conference Proceedings (OSTI)

Affected relatives are essential for pedigree linkage analysis, however, they cause a violation of the independent sample assumption in case-control association studies. To avoid the correlation between samples, a common practice is to take only one ... Keywords: Correlation, Effective sample size, Genetic association, Variance inflation

Yaning Yang; Elaine F. Remmers; Chukwuma B. Ogunwole; Daniel L. Kastner; Peter K. Gregersen; Wentian Li

2011-02-01T23:59:59.000Z

353

A Multi-Limit Mixed-Layer Entrainment Formulation  

Science Conference Proceedings (OSTI)

The second-moment equations for buoyancy flux and density-fluctuation variance in the entrainment zone of a mixed layer are combined to yield an entrainment rate (we dependence having the nature of Turner's relation. That is, weq?1 is seen as a ...

J. W. Deardorff

1983-06-01T23:59:59.000Z

354

Intrinsic gain modulation and adaptive neural coding  

E-Print Network (OSTI)

In many cases, the computation of a neural system can be reduced to a receptive field, or a set of linear filters, and a thresholding function, or gain curve, which determines the firing probability; this is known as a linear/nonlinear model. In some forms of sensory adaptation, these linear filters and gain curve adjust very rapidly to changes in the variance of a randomly varying driving input. An apparently similar but previously unrelated issue is the observation of gain control by background noise in cortical neurons: the slope of the firing rate vs current (f-I) curve changes with the variance of background random input. Here, we show a direct correspondence between these two observations by relating variance-dependent changes in the gain of f-I curves to characteristics of the changing empirical linear/nonlinear model obtained by sampling. In the case that the underlying system is fixed, we derive relationships relating the change of the gain with respect to both mean and variance with the receptive fi...

Hong, Sungho; Fairhall, Adrienne

2008-01-01T23:59:59.000Z

355

Rate of Change of Heat Storage of the World Ocean  

Science Conference Proceedings (OSTI)

Results or a Fourier analysis of climatological fields of the monthly rate of change of heat storage for the world ocean are presented. The amplitude and Phase of the first harmonic are shown, as well as the percent variance of the annual cycle ...

Sydney Levitus

1987-04-01T23:59:59.000Z

356

The Arrival Rate of Raindrops at the Ground  

Science Conference Proceedings (OSTI)

Examination of the arrival-rate distribution of raindrops from disturbed, post-cold-front air masses using the statistic k, the ratio of the variance of the drop rate to the mean, shows strong deviations from Poisson behavior toward clustering of ...

J. G. Hosking; C. D. Stow

1987-04-01T23:59:59.000Z

357

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

358

Bootstrapping to Assess and Improve Atmospheric Prediction Models  

Science Conference Proceedings (OSTI)

Bootstrapping is a simple technique typically used to assess accuracy of estimates of model parameters by using simple plug-in principles and replacing sometimes unwieldy theory by computer simulation. Common uses include variance estimation and confidence ... Keywords: CART, bootstrap, classification, hurricanes, instability, supervised learning, weather data

J. Sunil Rao

2000-04-01T23:59:59.000Z

359

Economic Impacts of Climate Variability in South Africa and Development of Resource Prediction Models  

Science Conference Proceedings (OSTI)

An analysis of food and water supplies and economic growth in South Africa leads to the realization that climate variability plays a major role. Summer rainfall in the period of 1980–99 is closely associated (variance = 48%) with year-to-year ...

Mark R. Jury

2002-01-01T23:59:59.000Z

360

Symmetrization Of Binary Random Variables  

E-Print Network (OSTI)

A random variable Y is called an independent symmetrizer of a given random variable X if (a) it is independent of X and (b) the distribution of X Y is symmetric about 0. In cases where the distribution of X is symmetric about its mean, it is easy to see that the constant random variable Y is a minimum-variance independent symmetrizer. Taking

Abram Kagan; Colin Mallows; Larry Shepp; Robert J. Vanderbei; Yehuda Vardi

1999-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "variance stratum stratum3" 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

Stable Boundary Layer Depth from High-Resolution Measurements of the Mean Wind Profile  

Science Conference Proceedings (OSTI)

The depth h of the stable boundary layer (SBL) has long been an elusive measurement. In this diagnostic study the use of high-quality, high-resolution (?z = 10 m) vertical profile data of the mean wind U(z) and streamwise variance ?u2(z) is ...

Yelena L. Pichugina; Robert M. Banta

2010-01-01T23:59:59.000Z

362

Analysing Superimposed Oriented Patterns Ingo Stuke, Til Aach  

E-Print Network (OSTI)

Analysing Superimposed Oriented Patterns Ingo Stuke, Til Aach Institute for Signal Processing orientation in images is often posed as the task of finding the minimum variance axis in a lo- cal eigenvalue signals the presence of more than one local orientation. We describe a framework for estimating

Lübeck, Universität zu

363

The estimation techniques of the time series correlations in nuclear reactor calculations by the Monte Carlo method using multiprocessor computers  

Science Conference Proceedings (OSTI)

The algorithms of estimation of the time series correlation functions in nuclear reactor calculations using the Monte Carlo method are described. Correlation functions are used for the estimation of biases, for calculations of variance taking into account the correlations between neutron generations, and for choosing skipped generations.

Kalugin, M. A.; Oleynik, D. S.; Sukhino-Khomenko, E. A., E-mail: sukhino-khomenko@adis.vver.kiae.ru [National Research Centre Kurchatov Institute (Russian Federation)

2012-12-15T23:59:59.000Z

364

A self-organizing neuro-fuzzy network based on first order effect sensitivity analysis  

Science Conference Proceedings (OSTI)

As an effective method that can provide the information about the influence of inputs on the variation of output, variance based sensitivity analysis is widely used to determine the structure of neural networks. In the past, the global sensitivity analysis ... Keywords: First order effect, Neuro-fuzzy networks, Sensitivity analysis, Systemic fluctuation

Cheng Chen, Fei-Yue Wang

2013-10-01T23:59:59.000Z

365

Geometric Concerns Pertaining to Applications of Statistical Tests in the Atmospheric Sciences  

Science Conference Proceedings (OSTI)

This paper is concerned. with the application of well-known statistical methods (e.g. matched-pairs t-test, two-sample t-test, one-way analysis of variance and significance test of Pearson's correlation coefficient) in the atmospheric sciences. ...

Paul W. Mielke Jr.

1985-06-01T23:59:59.000Z

366

Latin square three dimensional gage master  

DOE Patents (OSTI)

A gage master for coordinate measuring machines has an nxn array of objects distributed in the Z coordinate utilizing the concept of a Latin square experimental design. Using analysis of variance techniques, the invention may be used to identify sources of error in machine geometry and quantify machine accuracy.

Jones, Lynn L. (Lexena, KS)

1982-01-01T23:59:59.000Z

367

Sample path large deviations for a family of long-range dependent traffic and associated queue length processes  

Science Conference Proceedings (OSTI)

We consider the long-range dependent cumulative traffic generated by the superposition of constant rate fluid sources having exponentially distributed inter start times and Pareto distributed durations with finite mean and infinite variance. We prove ... Keywords: Fluid source, Pareto distribution, Rate function

Kurt Majewski

2006-01-01T23:59:59.000Z

368

The Resonant Retina: Exploiting Vibration Noise to Optimally Detect Edges in an Image  

Science Conference Proceedings (OSTI)

Abstract¿We show that, far from being a drawback, the ubiquitous presence of random vibrations in vision systems operating from mobile devices can advantageously be used as a fundamental tool for edge detection. Directly inspired by biology, the concept ... Keywords: Edge detection, random vibration of the optical axis, microsaccades, threshold variance estimator, Fisher information, Cramer-Rao inequality, stochastic resonance.

Max-Olivier Hongler; Yuri L. de Meneses; Antoine Beyeler; Jacques Jacot

2003-09-01T23:59:59.000Z

369

A Bayesian decision theory approach to variable selection for discrimination  

Science Conference Proceedings (OSTI)

Motivated by examples in spectroscopy, we study variable selection for discrimination in problems with very many predictor variables. Assuming multivariate normal distributions with common variance for the predictor variables within groups, we develop ... Keywords: Bayes, decision theory, discriminant analysis, near infrared spectroscopy, simulated annealing, variable selection

T. Fearn; P. J. Brown; P. Besbeas

2002-07-01T23:59:59.000Z

370

The MCNP-DSP code for calculations of time and frequency analysis parameters for subcritical systems  

Science Conference Proceedings (OSTI)

This paper describes a modified version of the MCNP code, the MCNP-DSP. Variance reduction features were disabled to have strictly analog particle tracking in order to follow fluctuating processes more accurately. Some of the neutron and photon physics routines were modified to better represent the production of particles. Other modifications are discussed.

Valentine, T.E.; Mihalczo, J.T. [Oak Ridge National Lab., TN (United States)

1995-12-31T23:59:59.000Z

371

Interannual Variation of the Winter Rainfall in Malaysia Caused by the Activity of Rain-Producing Disturbances  

Science Conference Proceedings (OSTI)

Heavy rainfall/flood (HRF) cyclones contribute close to two-thirds of the total rainfall PT in both parts of Malaysia [peninsular Malaysia (M) and west Borneo (B)]. Judging by the rainfall variance produced by these cyclones and its correlation (~...

Tsing-Chang Chen; Jenq-Dar Tsay; Ming-Cheng Yen; Jun Matsumoto

2013-07-01T23:59:59.000Z

372

AN ASSESSMENT OF MCNP WEIGHT WINDOWS  

SciTech Connect

The weight window variance reduction method in the general-purpose Monte Carlo N-Particle radiation transport code MCNPTM has recently been rewritten. In particular, it is now possible to generate weight window importance functions on a superimposed mesh, eliminating the need to subdivide geometries for variance reduction purposes. Our assessment addresses the following questions: (1) Does the new MCNP4C treatment utilize weight windows as well as the former MCNP4B treatment? (2) Does the new MCNP4C weight window generator generate importance functions as well as MCNP4B? (3) How do superimposed mesh weight windows compare to cell-based weight windows? (4) What are the shortcomings of the new MCNP4C weight window generator? Our assessment was carried out with five neutron and photon shielding problems chosen for their demanding variance reduction requirements. The problems were an oil well logging problem, the Oak Ridge fusion shielding benchmark problem, a photon skyshine problem, an air-over-ground problem, and a sample problem for variance reduction.

J. S. HENDRICKS; C. N. CULBERTSON

2000-01-01T23:59:59.000Z

373

Spring School on Methods and Tools  

E-Print Network (OSTI)

Science and Technology Initiatives (MISTI) Global Seed Fund and MIT-Germany program German Science Foundation (DFG) Excellence Initiative Graduate School GSC 111 #12;Sunday, Mar 22, 2009 Couvenhalle 18:00 19, Nuclear Engineering 12:15 13:00 Catered Lunch 13:00 14:00 Variance Reduction in Stochastic Particle

374

Estimates of Spatial Degrees of Freedom  

Science Conference Proceedings (OSTI)

The spatial degrees of freedom (dof) of atmospheric flows are estimated by comparing the variance of the theoretical standardized chi-squared distribution with the sum of the squared eigenvalues of a spatial correlation matrix, dof = N2/?I = 1N?i...

Klaus Fraedrich; Christine Ziehmann; Frank Sielmann

1995-02-01T23:59:59.000Z

375

Entrepreneurs' Networks: Size, Diversity and Composition Shaped by Cultures of Rationality and Trust  

Science Conference Proceedings (OSTI)

The network around an entrepreneur is conceptualized as having structural properties of size, diversity and composition as network components of varying prominence in the entrepreneur's network. These properties are important by impacting entrepreneurs' ... Keywords: Cultural differences,Analysis of variance,Innovation management,Monitoring,Educational institutions,Size measurement,Global Entrepreneurship Monitor,Entrepreneurs,networks,culture

Thomas Schott; Maryam Cheraghi

2012-08-01T23:59:59.000Z

376

An analysis of the influence of some prior specifications in the identification of change points via product partition model  

Science Conference Proceedings (OSTI)

In this paper, we consider the product partition model for the estimation of normal means and variances of a sequence of observations that experiences changes in these parameters at unknown times. The estimates of the parameters by using product partition ... Keywords: Gibbs sampling, Yao's algorithm, cohesions, relevance, student-t distribution

R. H. Loschi; F. R. B. Cruz

2002-06-01T23:59:59.000Z

377

Large-Scale Sea Level Response to Atmospheric Forcing along the West Coast of North America, Summer 1973  

Science Conference Proceedings (OSTI)

Along the west Coast of North America, the response of sea level to fluctuations in alongshore wind stress at large alongshore scales (> 1000 km) accounted for a substantial faction of the total sea level variance during summer 1973. Space-time ...

George R. Halliwell Jr.; J. S. Allen

1984-05-01T23:59:59.000Z

378

Robust optimal decisions with imprecise forecasts  

Science Conference Proceedings (OSTI)

A robust minimax approach for optimal investment decisions with imprecise return forecasts and risk estimations in financial portfolio management is considered. Single-period and multi-period mean-variance optimization models are extended to worst-case ... Keywords: Minimax, Rival scenarios, Robust optimization

Nalan Gülp?nar; Berc Rustem

2007-04-01T23:59:59.000Z

379

Automated Regularization Parameter Selection in Multi-Scale Total Variation Models for Image Restoration  

Science Conference Proceedings (OSTI)

Multi-scale total variation models for image restoration are introduced. The models utilize a spatially dependent regularization parameter in order to enhance image regions containing details while still sufficiently smoothing homogeneous features. The ... Keywords: Hierarchical decomposition, Local variance estimator, Order statistics, Primal-dual method, Semismooth Newton method, Spatially dependent regularization parameter, Total variation regularization

Yiqiu Dong; Michael Hintermüller; M. Monserrat Rincon-Camacho

2011-05-01T23:59:59.000Z

380

EXPENDITURES General Fund Expenditures-2.0 % Page 12 NON-GENERAL FUND REVENUES  

E-Print Network (OSTI)

Key to revenue trend indicators: ?NEUTRAL ? = Variance of-1 % to +2 % compared to projections. ?POSITIVE ? = Positive variance of>+2 % compared to projections. ?WARNING ? = Negative variance of-1 % to-4 % compared to projections. ?NEGATIVE ? = Negative variance of>-4 % compared to projections. 1 First Quarter 2013- May 2013CITY FINANCIAL OVERVIEW EXECUTIVE SUMMARY Total General Fund revenue receipts for the first quarter of 2013, in the amount of $4,175,309, are above the projection by $172,955, or 4.3%. Total General Fund expenditures, in the amount of $4,508,707, are below the projection by $92,764, or 2.0%. Street Fund revenue receipts for the first quarter of 2013, including transfers in, total $511,302 and are $3,654, or 0.7%, above the projection. Street Fund expenditures, including transfers out, total $460,168 and are $19,734, or 4.1%, below the projection. Surface Water Utility Fund (SWM) revenue receipts for the first quarter of 2013 totaling $114,495 are $42,761, or 59.6%, above the projection. SWM expenditures total $691,401 and are $90,757, or 15.1%, above the projection. Real Estate Excise Tax (REET) revenue receipts for the first quarter of 2013 totaling $231,011 are $7,274, or 3.3%, ahead of the projection and

unknown authors

2013-01-01T23:59:59.000Z

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381

Rev. 03/2012 INSTRUCTIONS AND FORM  

E-Print Network (OSTI)

of the runoff regime, or as an ensemble of annual FDCs (AFDCs) estimated for each year of record (Vogel or median of the AFDCs as well as the variances or confidence intervals of the runoff quantiles. The mean or median AFDC is a hypothetical AFDC, which describes the annual runoff regime for a typical hydrological

Rhode Island, University of

382

A general approach to heteroscedastic linear regression  

Science Conference Proceedings (OSTI)

Our article presents a general treatment of the linear regression model, in which the error distribution is modelled nonparametrically and the error variances may be heteroscedastic, thus eliminating the need to transform the dependent variable in many ... Keywords: Density estimation, Dirichlet process mixture, Heteroscedasticity, Model checking, Nonparametric regression, Variable selection

David S. Leslie; Robert Kohn; David J. Nott

2007-06-01T23:59:59.000Z

383

On the advantages of using green light to study fluorescence yield changes in leaves  

E-Print Network (OSTI)

, at variance with the commonly used set-ups, uses of a weakly absorbed light source (light-emitting diodes. Although the exciting light is weakly absorbed, the possibility to tune the intensity of the light emitting diodes allows one to reach photochemical rates ranging from 104 s- 1 to 0.25 s- 1 rendering

384

Predicting summer energy consumption from homeowners attitudes  

SciTech Connect

Two surveys examined the relationship between homeowners attitudes toward energy use and their actual summer electric consumption. In Survey 1, 56 couples filled out questionnaires concerning their energy attitudes. A factor analysis of their responses revealed four factors: comfort and health concerns, effort to conserve and monetary savings, role of the individual, and legitimacy of the energy crisis. The factors were entered into a multiple regression analysis to predict actual summer electric consumption. The attitudinal factors together significantly accounted for 55% of the variance in summer electric consumption. The comfort and health factor by itself explained 30% of the consumption variance. Survey 2, consisting of 69 couples, was conducted to elaborate the meaning of the factors. The results of the factor analysis of Survey 2 revealed six factors: comfort, health, individual's role, belief in science, legitimacy of the energy crisis, and effort to conserve. An overall regression analysis showed that the factors significantly explained nearly 60% of the summer consumption variance. The comfort factor was again the best predictor of summer electric consumption, accounting for 42% of the variance. It was concluded that attitudes about one's comfort are significantly related to household energy consumption (primarily air conditioning). The implications for energy conservation campaigns were discussed. 10 references, 3 tables.

Seligman, C.; Kriss, M.; Darley, J.M.; Fazio, R.H.; Becker, L.J.; Pryor, J.B.

1979-01-01T23:59:59.000Z

385

A Rapid Method of Computing Empirical Orthogonal Functions from a Large Dataset  

Science Conference Proceedings (OSTI)

A rapid method of computing the EOFs for a problem with a large covariance matrix is presented. The resulting EOFs are not the “true” ones because they do not guarantee that the maximum variance is explained in the dependent sample. However, in ...

Juhani Rinne; Simo Järvenoja

1986-12-01T23:59:59.000Z

386

A Coordinate Gradient Descent Method for l1-regularized Convex ...  

E-Print Network (OSTI)

Apr 16, 2008 ... In this paper, we propose the CGD method to solve (1) and, in particular, ...... involving A, we only needs to evaluate Ad, where d is a descent direction, once at each ... where ? is Gaussian white noise with variance (0.01 Ax)2.

387

Pulse-to-Pulse Coherent Doppler Sonar Signal Processing Techniques  

Science Conference Proceedings (OSTI)

In this paper we present and discuss techniques for the computation of the mean and spectral variance of a pulse-to-pulse coherent sonar signal, leading to the measurement of mean water velocity and turbulence. The use of an autocovariance ...

Roger Lhermitte; Robert Serafin

1984-12-01T23:59:59.000Z

388

A variable fixing version of the two-block nonlinear constrained ...  

E-Print Network (OSTI)

Nov 7, 2013 ... The aim of the present paper is to bring a further contribution in this research ...... chosen as b = Ax? + ?, where ? is a Gaussian white vector with variance ... parameter c in (14) and the parameters ?k ad ?k included in (26) and ...

389

SCHOOL OF MATHEMATICS AND STATISTICS Spring Semester Time Series 2 hours  

E-Print Network (OSTI)

to University regulations. There are 99 marks available on the paper. Please leave this exam paper on your desk time series and their relationship, using suitable technical terms and adding approximate quanti series model Xt = 1 3 Xt-1 + t + 1 2 t-1 - 1 4 t-2, where t is white noise with variance 4. (i) Explain

Oakley, Jeremy

390

Fuzzy evaluation of cogeneration alternatives in a petrochemical industry  

Science Conference Proceedings (OSTI)

This paper derives fuzzy net present value (NPV) and pay back year (PBY) models as decision indexes for cogeneration alternatives decision-making. The Mellin transform is employed to establish the means and variances of the fuzzy indexes in order to ... Keywords: Cogeneration, Economic decision analysis, Fuzzy algebra, Fuzzy ranking, Mellin transform

J. N. Sheen

2005-04-01T23:59:59.000Z

391

Resolving Oceanic Shear and Velocity with the Multi-Scale Profiler  

Science Conference Proceedings (OSTI)

The Multi-Scale Profiler (MSP), a freely falling dropsonde, has been used over the past 12 years to measure oceanic shear variance. Complete resolution of oceanic shear spectra is achieved by combining the measurements of MSP’s acoustic current ...

D. P. Winkel; M. C. Gregg; T. B. Sanford

1996-10-01T23:59:59.000Z

392

Does Ownership Affect the Variability of the Production Process? Evidence from International Courier Services  

Science Conference Proceedings (OSTI)

A firm often must ensure that products or services it produces match customer expectations. We define variability as any deviation in a production process yielding products or services whose attributes differ from the firm's stated target specifications. ... Keywords: contracting, governance, organizational choice, reliability, variability, variance

Chihmao Hsieh; Sérgio Giovanetti Lazzarini; Jackson A. Nickerson; Marcio Laurini

2010-07-01T23:59:59.000Z

393

A New Measure of Earnings Forecast Uncertainty Xuguang Sheng  

E-Print Network (OSTI)

A New Measure of Earnings Forecast Uncertainty Xuguang Sheng American University Washington, D of earnings forecast uncertainty as the sum of dispersion among analysts and the variance of mean forecast available to analysts at the time they make their forecasts. Hence, it alleviates some of the limitations

Kim, Kiho

394

Quarterly Journal of the Royal Meteorological Society Q. J. R. Meteorol. Soc. 00: 115 (0000) Controlling model error of underdamped forecast models in  

E-Print Network (OSTI)

) Controlling model error of underdamped forecast models in sparse observational networks using a variance@maths.usyd.edu.au The problem of controlling covariance overestimation due to underdamped forecast models and sparsity the initial conditions and forecast model and to combat the associated forecast error and flow

Gottwald, Georg A.

395

Conditional copulas, association measures and their applications  

Science Conference Proceedings (OSTI)

One way to model a dependence structure is through the copula function which is a mean to capture the dependence structure in the joint distribution of variables. Association measures such as Kendall's tau or Spearman's rho can be expressed as functionals ... Keywords: Asymptotic bias, Asymptotic variance, Conditional Kendall's tau, Conditional Spearman's rho, Conditional copula, Empirical estimation, Global and local bandwidths, Local dependencies, Smoothing

Irène Gijbels; Noël Veraverbeke; Marel Omelka

2011-05-01T23:59:59.000Z

396

Microphysical Interpretation of Multi-Parameter Radar Measurements in Rain. Part II: Estimation of Raindrop Distribution Parameters by Combined Dual-Wavelength and Polarization Measurements  

Science Conference Proceedings (OSTI)

The radar reflectivity weighted mean axis ratio R¯ and the variance of the axis ratio distribution ?R2 of an ensemble of raindrops can be estimated from polarization radar measurements. If the shape function relating axis ratio to drop size is ...

A. R. Jameson

1983-07-01T23:59:59.000Z

397

Semi-algebraic networks: An attempt to design geometric autopoietic models  

Science Conference Proceedings (OSTI)

This article focuses on an artificial life approach to some important problems in machine learning such as statistical discrimination, curve approximation, and pattern recognition. We describe a family of models, collectively referred to as semi-algebraic ... Keywords: autopoiesis, bias/variance dilemma, curve approximation, discrimination, pattern recognition, perceptrons

Guillaume Deffuant; Thierry Fuhs; Etienne Monneret; Paul Bourgine; Francisco Varela

1995-01-01T23:59:59.000Z

398

Brief paper: Estimation of the disturbance structure from data using semidefinite programming and optimal weighting  

Science Conference Proceedings (OSTI)

Designing a state estimator for a linear state-space model requires knowledge of the characteristics of the disturbances entering the states and the measurements. In [Odelson, B. J., Rajamani, M. R., & Rawlings, J. B. (2006). A new autocovariance least ... Keywords: Covariance estimation, Minimum independent disturbances, Minimum variance estimation, Semidefinite programming, State estimation

Murali R. Rajamani; James B. Rawlings

2009-01-01T23:59:59.000Z

399

Annual Progress Report Period May 1, 2010April 30, 2011  

E-Print Network (OSTI)

(PAR, T, RH, PPT) and a newly installed within-canopy eddy co-variance measurement system. All measurement system (Michael Goulden, UCI). We added an additional set of AMR and soil sensor nodes at the La Observing Systems (NAMOS), employs coordinated measurements between stationary sensing nodes and robotic

Soatto, Stefano

400

Generation of synthetic multifractal realistic surfaces based on natural model and lognormal cascade: application to MRI classification  

Science Conference Proceedings (OSTI)

This paper presents a method of generating realistic synthetic multi-fractals surfaces, constructed with multiplicative cascades, that follow lognormal probability density function.The conservation of the natural image gradient direction, and the variance ... Keywords: Bayesian classification, Monte-Carlo sampling, discrete wavelet transform, iterative conditional modes (ICM), lognormal cascade, markov random fields (MRF), multifractal analysis, probabilistic model, wavelet leader

Mohamed Khider; Abdelmalik Taleb-Ahmed; Boualem Haddad

2010-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "variance stratum stratum3" 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

Baryon Fluctuations in High Energy Nuclear Collisions  

E-Print Network (OSTI)

We propose that dramatic changes in the variances and covariance of protons and antiprotons can result if baryons approach chemical equilibrium in nuclear collisions at RHIC. To explore how equilibration alters these fluctuations, we formulate both equilibrium and nonequilibrium hadrochemical descriptions of baryon evolution. Contributions to fluctuations from impact parameter averaging and finite acceptance in nuclear collisions are numerically simulated.

Sean Gavin; Claude Pruneau

1999-07-09T23:59:59.000Z

402

Second completely revised edition Daniel Desbruyres, Michel Segonzac & Monika Bright  

E-Print Network (OSTI)

the increased computational load. Since all of these transactions are stored in the VAMPIRE database, no dataVAMPIRE microarray suite: a web-based platform for the interpretation of gene expression data of analysis, collectively known as variance-modeled posterior inference with regional exponentials (VAMPIRE

Oppo, Delia W.

403

A Visual Network Analysis Method for Large Scale Parallel I/O Systems  

E-Print Network (OSTI)

the increased computational load. Since all of these transactions are stored in the VAMPIRE database, no dataVAMPIRE microarray suite: a web-based platform for the interpretation of gene expression data of analysis, collectively known as variance-modeled posterior inference with regional exponentials (VAMPIRE

404

t h e u n i v e r s i t y o f g e o r g i A college of veterinAry Medicine  

E-Print Network (OSTI)

the increased computational load. Since all of these transactions are stored in the VAMPIRE database, no dataVAMPIRE microarray suite: a web-based platform for the interpretation of gene expression data of analysis, collectively known as variance-modeled posterior inference with regional exponentials (VAMPIRE

Scott, Robert A.

405

VAMPIRE microarray suite: a web-based platform for the interpretation of gene expression data  

E-Print Network (OSTI)

the increased computational load. Since all of these transactions are stored in the VAMPIRE database, no dataVAMPIRE microarray suite: a web-based platform for the interpretation of gene expression data of analysis, collectively known as variance-modeled posterior inference with regional exponentials (VAMPIRE

406

INTERNATIONAL OXFORD UNIVERSITY  

E-Print Network (OSTI)

the increased computational load. Since all of these transactions are stored in the VAMPIRE database, no dataVAMPIRE microarray suite: a web-based platform for the interpretation of gene expression data of analysis, collectively known as variance-modeled posterior inference with regional exponentials (VAMPIRE

Herz, Laura M.

407

Kalman Filtering with Markovian Packet Losses and Stability Criteria  

E-Print Network (OSTI)

and lower bounds for the tail distribution of the peak variance. For practically verifying the stability measurements and final signal processing take place in geographically separate lo- cations and the usage. Email: minyi.huang@rsise.anu.edu.au S. Dey is with Department of Electrical and Electronic Engineer- ing

Huang, Minyi

408

Important Parameters to CO2 Flow Predictions in A Deep Saline Aquifer: A Sensitivity Analysis Based on the Design of Experiment  

E-Print Network (OSTI)

(i.e., variance of natural log permeability, VAR), (4) gas phase relative permeability hysteresis (i the outcome is the mobile gas predicted at the end of the injection. Three statistically important factors , , q, krock become additionally important during monitoring; to predict the dissolved gas, SAL and VAR

Zhang, Ye

409

Theory of periodically pulsed Feynman-and Rossi-alpha methods Imre Pzsit and Andreas Enqvist  

E-Print Network (OSTI)

1. I. PÁZSIT, L. PÁL, "Neutron Fluctuations ­ A Treatise on the Physics of Branching Processes@nephy.chalmers.se INTRODUCTION Methods based on the fluctuations in the number of detected neutrons in a subcritical system driven with an extraneous neutron source, such as the variance-to-mean (Feynman-alpha) or the correlation

Pázsit, Imre

410

Waves along the Equator in the Atlantic  

Science Conference Proceedings (OSTI)

Spectra of two hundred days of data from five inverted echo sounders deployed along the equator in 1983–84 and a thousand days of 30 crossings of the equator by the TOPEX/POSEIDON altimeter in 1993–95 are both found to have enhanced variance of ...

Eli Joel Katz

1997-12-01T23:59:59.000Z

411

EasyDelta: A spreadsheet for kinetic modeling of the stable carbon isotope composition of natural gases  

Science Conference Proceedings (OSTI)

A new kinetic model and an Excel^(C) spreadsheet program for modeling the stable carbon isotope composition of natural gases is provided in this paper. The model and spreadsheet could be used to describe and predict the variances in stable carbon isotope ... Keywords: Carbon isotope, Excel spreadsheet, Kinetics, Modeling, Natural gas

Yan-Rong Zou; Lianyuan Wang; Yanhua Shuai; Ping'an Peng

2005-08-01T23:59:59.000Z

412

Beneficial changes in dependence structures and two-moment decision models  

Science Conference Proceedings (OSTI)

We analyze the comparative static effects of beneficial changes in the dependence structure between risks. In a quasi-linear decision model with an endogenous risk and a dependent background risk, a mean-variance decision maker will choose a lower level ... Keywords: Concordance order, Correlation, Elasticity of risk aversion, Prudence

Thomas Eichner; Andreas Wagener

2010-05-01T23:59:59.000Z

413

Sidelobe Suppression for Robust Beamformer Via the Mixed Norm Constraint  

Science Conference Proceedings (OSTI)

Applying a sparse constraint on the beam pattern has been suggested to suppress the sidelobe of the minimum variance distortionless response (MVDR) beamformer recently. To further improve the performance, we add a mixed norm constraint on the beam pattern. ... Keywords: Mixed norm constraint, Robust beamforming, Sidelobe suppression, Sparse constraint

Yipeng Liu; Qun Wan

2012-08-01T23:59:59.000Z

414

ELECTRICAL ENGINEER High growth industry career opportunity  

E-Print Network (OSTI)

shall be submitted in writing to the DCM Project Manager, using the KU Standards Variance Request Form Designers shall verify that all applicable portions of these standards are incorporated into the project,470-Volt power to the Lawrence main campus at two distribution substations. Electrical metering for billing

415

Time Schedule Preliminary  

E-Print Network (OSTI)

-version were conducted to examine the e ects of the evaporation-wind feedback EWF, Emanuel 1987, Neelin et al advection from a previous run, 4 both the EWF and extratropical disturbances turned o . The corresponding spectra are shown in Fig. 9. The lack of EWF signi cantly reduces the amplitude of variances in spectral

Washington at Seattle, University of

416

Advanced algorithms for multidimensional sensitivity studies of large-scale air pollution models based on Sobol sequences  

Science Conference Proceedings (OSTI)

In this paper advanced variance-based algorithms for global sensitivity analysis are studied. We consider efficient algorithms, such as Monte Carlo, quasi-Monte Carlo (QMC) and scrambled quasi-Monte Carlo algorithms based on Sobol sequences. Low discrepancy ... Keywords: Monte Carlo method, Multidimensional integration, Scrambled Sobol sequences, Sobol sequences

I. Dimov; R. Georgieva; Tz. Ostromsky; Z. Zlatev

2013-02-01T23:59:59.000Z

417

The Coupled Manifold  

Science Conference Proceedings (OSTI)

A new method is presented to detect the portion of variability connected between two climatic fields. The method is a realization of the Procrustes problem, and it is a generalization of methods for analysis of variance such as the singular value ...

A. Navarra; J. Tribbia

2005-02-01T23:59:59.000Z

418

On the fundamental limitations of transformational design  

Science Conference Proceedings (OSTI)

The completeness of a collection of design transformations is an important aspect in transformational design. Completeness guarantees that any correct design can in principle be explored using the transformation system. In the field of transformational ... Keywords: Completeness, formal methods, high-level synthesis, syntactic variance problem, transformational design

Jeroen Voeten

2001-10-01T23:59:59.000Z

419

Expression of proliferative and inflammatory markers in a full-thickness human skin equivalent following exposure to the model sulfur mustard vesicant, 2-chloroethyl ethyl sulfide  

Science Conference Proceedings (OSTI)

Sulfur mustard is a potent vesicant that induces inflammation, edema and blistering following dermal exposure. To assess molecular mechanisms mediating these responses, we analyzed the effects of the model sulfur mustard vesicant, 2-chloroethyl ethyl sulfide, on EpiDerm-FT{sup TM}, a commercially available full-thickness human skin equivalent. CEES (100-1000 {mu}M) caused a concentration-dependent increase in pyknotic nuclei and vacuolization in basal keratinocytes; at high concentrations (300-1000 {mu}M), CEES also disrupted keratin filament architecture in the stratum corneum. This was associated with time-dependent increases in expression of proliferating cell nuclear antigen, a marker of cell proliferation, and poly(ADP-ribose) polymerase (PARP) and phosphorylated histone H2AX, markers of DNA damage. Concentration- and time-dependent increases in mRNA and protein expression of eicosanoid biosynthetic enzymes including COX-2, 5-lipoxygenase, microsomal PGE{sub 2} synthases, leukotriene (LT) A{sub 4} hydrolase and LTC{sub 4} synthase were observed in CEES-treated skin equivalents, as well as in antioxidant enzymes, glutathione S-transferases A1-2 (GSTA1-2), GSTA3 and GSTA4. These data demonstrate that CEES induces rapid cellular damage, cytotoxicity and inflammation in full-thickness skin equivalents. These effects are similar to human responses to vesicants in vivo and suggest that the full thickness skin equivalent is a useful in vitro model to characterize the biological effects of mustards and to develop potential therapeutics.

Black, Adrienne T. [Pharmacology and Toxicology, Rutgers University, Piscataway, NJ (United States); Hayden, Patrick J. [MatTek Corporation, Ashland, MA (United States); Casillas, Robert P. [Battelle Memorial Institute, Columbus, OH (United States); Heck, Diane E. [Environmental Health Sciences, New York Medical College, Valhalla, NY (United States); Gerecke, Donald R. [Pharmacology and Toxicology, Rutgers University, Piscataway, NJ (United States); Sinko, Patrick J. [Pharmaceutics, Rutgers University, Piscataway, NJ (United States); Laskin, Debra L. [Pharmacology and Toxicology, Rutgers University, Piscataway, NJ (United States); Laskin, Jeffrey D., E-mail: jlaskin@eohsi.rutgers.ed [Environmental and Occupational Medicine, UMDNJ-Robert Wood Johnson Medical School, Piscataway, NJ (United States)

2010-12-01T23:59:59.000Z

420

dg-ga/9411007 Math. Z., to appear. THE SINGULARITIES OF YANG-MILLS CONNECTIONS FOR BUNDLES ON A SURFACE. II. THE STRATIFICATION  

E-Print Network (OSTI)

Abstract. Let ? be a closed surface, G a compact Lie group, not necessarily connected, with Lie algebra g, endowed with an adjoint action invariant scalar product, let ?: P ? ? be a principal G-bundle, and pick a Riemannian metric and orientation on ? so that the corresponding Yang-Mills equations are defined. In an earlier paper we determined the local structure of the moduli space N(?) of central Yang-Mills connections on ? near an arbitrary point. Here we show that the decomposition of N(?) into connected components of orbit types of central Yang-Mills connections is a stratification in the strong (i. e. Whitney) sense; furthermore each stratum, being a smooth manifold, inherits a finite volume symplectic structure from the given data. This complements, in a way, results of Atiyah-Bott in that it will in general decompose further the critical sets of the corresponding Yang-Mills functional into smooth pieces. 1991 Mathematics Subject Classification. 14D20, 32G13, 32S60, 58C27, 58D27, 58E15, 81T13. Key words and phrases. Geometry of principal bundles, singularities of smooth mappings, symplectic reduction with singularities, Yang-Mills connections, stratified symplectic space, Poisson structure, geometry of moduli spaces, representation spaces, moduli of vector bundles. † The author carried out this work in the framework of the VBAC research group of Europroj. 2 JOHANNES HUEBSCHMANN

Johannes Huebschmann

1993-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "variance stratum stratum3" 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

Consumption patterns and household hazardous solid waste generation in an urban settlement in Mexico  

SciTech Connect

Mexico is currently facing a crisis in the waste management field. Some efforts have just commenced in urban and in rural settlements, e.g., conversion of open dumps into landfills, a relatively small composting culture, and implementation of source separation and plastic recycling strategies. Nonetheless, the high heterogeneity of components in the waste, many of these with hazardous properties, present the municipal collection services with serious problems, due to the risks to the health of the workers and to the impacts to the environment as a result of the inadequate disposition of these wastes. A generation study in the domestic sector was undertaken with the aim of finding out the composition and the generation rate of household hazardous waste (HHW) produced at residences. Simultaneously to the generation study, a socioeconomic survey was applied to determine the influence of income level on the production of HHW. Results from the solid waste generation analysis indicated that approximately 1.6% of the waste stream consists of HHW. Correspondingly, it was estimated that in Morelia, a total amount of 442 ton/day of domestic waste are produced, including 7.1 ton of HHW per day. Furthermore, the overall amount of HHW is not directly related to income level, although particular byproducts do correlate. However, an important difference was observed, as the brands and the presentation sizes of goods and products used in each socioeconomic stratum varied.

Delgado Otoniel, Buenrostro [Instituto De Investigaciones Agricolas y Forestales, Universidad Michoacana De San Nicolas De Hidalgo, Av. San Juanito Itzicuaro S/N, Col. San Juanito Itzicuaro, C.P. 58330, Morelia-Aeropuerto, Michoacan (Mexico)], E-mail: otonielb@zeus.umich.mx; Liliana, Marquez-Benavides; Gaona Francelia, Pinette [Instituto De Investigaciones Agricolas y Forestales, Universidad Michoacana De San Nicolas De Hidalgo, Av. San Juanito Itzicuaro S/N, Col. San Juanito Itzicuaro, C.P. 58330, Morelia-Aeropuerto, Michoacan (Mexico)

2008-07-01T23:59:59.000Z

422

DOI: 10.1007/s10439-010-0190-4 Effect of Surfactant Mixtures on Skin Structure and Barrier Properties  

E-Print Network (OSTI)

Associate Editor Daniel Takashi Kamei oversaw the review of this article. Abstract—We investigated the effect of two commonly studied surfactants, sodium dodecyl sulfate (SDS) and dodecyl trimethylammonium bromide (C 12TAB), on skin barrier properties. Using skin conductivity, FT-IR of stratum corneum samples, and penetration of radiolabelled SDS, we determined that addition of C12TAB lowers the ability of SDS to perturb skin’s barrier properties. Ultrafiltration experiments revealed that addition of C12TAB serves to decrease the concentration of monomers and sub-micellar aggregates. None of the measured skin properties including enhancement of skin conductivity, perturbation of lipid structure and skin concentration of SDS correlated with the total SDS concentration in the donor compartment (i.e., the total SDS concentration). However, all these parameters correlated well against the concentration of monomers and sub-micellar aggregates. These findings provide the evidence of the importance of monomer and sub-micellar components in altering skin barrier properties.

Monica A. James-smith; Brittney Hellner; Nancy Annunziato; Samir Mitragotri

2010-01-01T23:59:59.000Z

423

Foreign Influences and Consequences on the Nuragic Culture of Sardinia  

E-Print Network (OSTI)

Although it is accepted that Phoenician colonization occurred on Sardinia by the 9th century B.C., it is possible that contact between Sardinia?s indigenous population and the Levantine region occurred in the Late Bronze Age (LBA). Eastern LBA goods found on the island are copper oxhide ingots and Aegean pottery. Previously, it has been suggested that Mycenaeans were responsible for bringing the eastern goods to Sardinia, but the presence of Aegean pottery shards does not confirm the presence of Mycenaean tradesmen. Also, scholars of LBA trade have explained the paucity of evidence for a Mycenaean merchant fleet. Interpretations of two LBA shipwrecks, Cape Gelidonya and Uluburun, indicate that eastern Mediterranean merchants of Cypriot or Syro-Canaanite origin, transported large quantities of oxhide ingots from the Levant towards the west. It remains possible that similar itinerant merchants conducted ventures bringing eastern goods to Sardinia while exploring the western Mediterranean. Trade in eastern goods may have stimulated the advancement that occurred in Nuragic culture in the LBA, resulting in the emergence of an elite social stratum in the Nuragic society. Archaeological evidence, such as elitist burials and increasingly complex architecture, supports the idea of cultural change due to internal competition. This „peer-polity? effect may have been incited because of limited accessibility to the exotic eastern goods and the „ownership? to the rights of this exchange.

Choltco, Margaret E.

2009-12-01T23:59:59.000Z

424

Development of analytical and numerical models for the assessment and interpretation of hydrogeological field tests  

Science Conference Proceedings (OSTI)

Mathematical models of the flow and tracer tests in fractured aquifers are being developed for the further study of radioactive wastes migration in round water at the Lake Area, which is associated with one of the waste disposal site in Russia. The choice of testing methods, tracer types (chemical or thermal) and the appropriate models are determined by the nature of the ongoing ground-water pollution processes and the hydrogeological features of the site under consideration. Special importance is attached to the increased density of wastes as well as to the possible redistribution of solutes both in the liquid phase and in the absorbed state (largely, on fracture surfaces). This allows for studying physical-and-chemical (hydrogeochemical) interaction parameters which are hard to obtain (considering a fractured structure of the rock mass) in laboratory. Moreover, a theoretical substantiation is being given to the field methods of studying the properties of a fractured stratum aimed at the further construction of the drainage system or the subsurface flow barrier (cutoff wall), as well as the monitoring system that will evaluate the reliability of these ground-water protection measures. The proposed mathematical models are based on a tight combination of analytical and numerical methods, the former being preferred in solving the principal (2D axisymmetrical) class of the problems. The choice of appropriate problems is based on the close feedback with subsequent field tests in the Lake Area. 63 refs.

Mironenko, V.A.; Rumynin, V.G.; Konosavsky, P.K. [St. Petersburg Mining Inst. (Russian Federation); Pozdniakov, S.P.; Shestakov, V.M. [Moscow State Univ. (Russian Federation); Roshal, A.A. [Geosoft-Eastlink, Moscow (Russian Federation)

1994-07-01T23:59:59.000Z

425

Pipeline corridors through wetlands - impacts on plant communities: Bayou Grand Cane, De Soto Parish, Louisiana. Topical report, August 1991--July 1993  

SciTech Connect

The goal of the Gas Research Institute Wetland Corridors Program is to document impacts of existing pipeline on the wetlands they traverse. To accomplish this goal, 12 existing wetland crossings were surveyed. These sites varied in elapsed time since pipeline construction, wetland type, pipeline installation techniques, and night of-way (ROW) management practices. This report presents the results of a survey conducted over the period of August 12-13, 1991, at the Bayou Grand Cane crossing in De Soto Parish, Louisiana, where a pipeline constructed three years prior to the survey crosses the bayou through mature bottomland hardwoods. The sit was not seeded or fertilized after construction activities. At the time of sampling, a dense herb stratum (composed of mostly native species) covered the 20-m-wide ROW, except within drainage channels. As a result of the creation of the ROW, new habitat was created, plant diversity increased, and forest habitat became fragmented. The ROW must be maintained at an early stage of succession to allow access to the pipeline however, impacts to the wetland were minimized by decreasing the width of the ROW to 20 m and recreating the drainage channels across the ROW. The canopy trees on the ROW`s edge shaded part of the ROW, which helped to minimize the effects of the ROW.

Shem, L.M.; Zimmerman, R.E.; Hayes, D. [Argonne National Lab., IL (United States); Van Dyke, G.D. [Argonne National Lab., IL (United States)]|[Trinity Christian College, Palos Heights, IL (United States)

1994-12-01T23:59:59.000Z

426

Sampling Plan for Assaying Plates Containing Depleted or Normal Uranium  

Science Conference Proceedings (OSTI)

This paper describes the rationale behind the proposed method for selecting a 'representative' sample of uranium metal plates, portions of which will be destructively assayed at the Y-12 Security Complex. The total inventory of plates is segregated into two populations, one for Material Type 10 (depleted uranium (DU)) and one for Material Type 81 (normal [or natural] uranium (NU)). The plates within each population are further stratified by common dimensions. A spreadsheet gives the collective mass of uranium element (and isotope for DU) and the piece count of all plates within each stratum. These data are summarized in Table 1. All plates are 100% uranium metal, and all but approximately 60% of the NU plates have Kel-F{reg_sign} coating. The book inventory gives an overall U-235 isotopic percentage of 0.22% for the DU plates, ranging from 0.19% to 0.22%. The U-235 ratio of the NU plates is assumed to be 0.71%. As shown in Table 1, the vast majority of the plates are comprised of depleted uranium, so most of the plates will be sampled from the DU population.

Ivan R. Thomas

2011-11-01T23:59:59.000Z

427

Percutaneous characterization of the insect repellent DEET and the sunscreen oxybenzone from topical skin application  

SciTech Connect

The synergistic percutaneous enhancement between insect repellent DEET and sunscreen oxybenzone has been proven in our laboratory using a series of in vitro diffusion studies. In this study, we carried out an in vivo study to characterize skin permeation profiles from topical skin application of three commercially available repellent and sunscreen preparations. The correlation between skin disposition and drug metabolism was attempted by using data collected. Both DEET and oxybenzone permeated across the skin after the application and achieved substantial systemic absorption. Combined use of DEET and oxybenzone significantly enhanced the percutaneous penetration percentages (ranging 36-108%) due to mutual enhancement effects. Skin disposition indicated that DEET produced a faster transdermal permeation rate and higher systemic absorption extent, but oxybenzone formed a concentrated depot within the skin and delivered the content slowly over the time. In vivo AUC{sub P}/MRT of DEET and oxybenzone was increased by 37%/17% and 63%/10% when the two compounds were used together. No DEET was detected from the urine samples 48 h after the application. Tape stripping seemed to be a satisfactory approach for quantitative assessment of DEET and oxybenzone penetration into the stratum corneum. It was also concluded that pharmacological and toxicological perspectives from concurrent application of insect repellent and sunscreen products require further evaluation to ensure use efficacy and safety of these common consumer healthcare products.

Kasichayanula, Sreeneeranj [Faculty of Pharmacy, University of Manitoba, 50 Sifton Road, Winnipeg, MB, R3T 2N2 (Canada); House, James D. [Department of Animal Science, University of Manitoba, Winnipeg, MB, R3T 2N2 (Canada); Wang Tao [Faculty of Pharmacy, University of Manitoba, 50 Sifton Road, Winnipeg, MB, R3T 2N2 (Canada); Gu Xiaochen [Faculty of Pharmacy, University of Manitoba, 50 Sifton Road, Winnipeg, MB, R3T 2N2 (Canada)], E-mail: xgu@cc.umanitoba.ca

2007-09-01T23:59:59.000Z

428

Document  

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

9 Federal Register 9 Federal Register / Vol. 74, No. 122 / Friday, June 26, 2009 / Notices 1 DOE's NEPA regulations state at 10 CFR 1021.343(c) that the Secretary of Energy must provide written approval of any variance under that section. However, this authority has been delegated to the General Counsel pursuant to Department of Energy Delegation Order No. 00-015.00A to the General Counsel. 1 As noted in Western's Notice of Intent to prepare a Big Stone II EIS, Western became the lead agency for preparation of the EIS because the construction of Big Stone II would incorporate a major new generation resource into Western's Continued DOE's existing NEPA regulations provide for certain variances ''soundly based on the interests of national security or the public health, safety, or

429

Research Highlight  

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

Seasonal Case Studies Reveal Significant Variance in Large-Scale Forcing Seasonal Case Studies Reveal Significant Variance in Large-Scale Forcing Data Submitter: Xie, S., Lawrence Livermore National Laboratory Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Modeling Journal Reference: Xie, S, R.T Cederwall, M. Zhang, and J.J. Yio, Comparison of SCM and CSRM forcing data derived from the ECMWF model and from objective analysis at the ARM SGP site, J. Geophys. Res., 108(D16), 4499, doi:10.1029/2003JD003541, 2003. Observed (left) and ECMWF-derived (right) forcing fields of time-height distributions of the derived (top) vertical velocity, (middle) total advective tendency and temperature, and (bottom) total advective tendency of moisture during the selected strong precipitation period during summer

430

1  

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

Sensitivity of Satellite-Retrieved Cloud Properties to the Sensitivity of Satellite-Retrieved Cloud Properties to the Effective Variance of Cloud Droplet Size Distribution R.F. Arduini Science Applications International Corporation Hampton, Virginia P. Minnis and W.L. Smith, Jr. National Aeronautics and Space Administration Langley Research Center Hampton, Virginia J.K. Ayers and M.M. Khaiyer Analytical Services and Materials, Inc. P. Heck Coorperative Institute for Mesoscale Meteorological Studies/ University of Wisconsin-Madison Madison, Wisconsin Introduction Cloud reflectance models currently used in cloud property retrievals from satellites have been developed using size distributions defined by a set of fixed effective radii with a fixed effective variance. The satellite retrievals used for the Atmospheric Radiation Measurement (ARM) Program assume droplet

431

Decision support for operations and maintenance (DSOM) system  

DOE Patents (OSTI)

A method for minimizing the life cycle cost of processes such as heating a building. The method utilizes sensors to monitor various pieces of equipment used in the process, for example, boilers, turbines, and the like. The method then performs the steps of identifying a set optimal operating conditions for the process, identifying and measuring parameters necessary to characterize the actual operating condition of the process, validating data generated by measuring those parameters, characterizing the actual condition of the process, identifying an optimal condition corresponding to the actual condition, comparing said optimal condition with the actual condition and identifying variances between the two, and drawing from a set of pre-defined algorithms created using best engineering practices, an explanation of at least one likely source and at least one recommended remedial action for selected variances, and providing said explanation as an output to at least one user.

Jarrell, Donald B. (Kennewick, WA); Meador, Richard J. (Richland, WA); Sisk, Daniel R. (Richland, WA); Hatley, Darrel D. (Kennewick, WA); Brown, Daryl R. (Richland, WA); Keibel, Gary R. (Richland, WA); Gowri, Krishnan (Richland, WA); Reyes-Spindola, Jorge F. (Richland, WA); Adams, Kevin J. (San Bruno, CA); Yates, Kenneth R. (Lake Oswego, OR); Eschbach, Elizabeth J. (Fort Collins, CO); Stratton, Rex C. (Richland, WA)

2006-03-21T23:59:59.000Z

432

A Heat Capacity Estimator for Fourier Path Integral Simulations  

E-Print Network (OSTI)

Previous heat capacity estimators useful in path integral simulations have variances that grow with the number of path variables included. In the present work a new specific heat estimator for Fourier path integral Monte Carlo simulations is derived using methods similar to those used in developing virial energy estimators. The resulting heat capacity estimator has a variance that is roughly independent of the number of Fourier coe#cients (k max ) included, and the asymptotic convergence rate is shown to be proportional to 1/k 2 max when partial averaging is included. Quantum Monte Carlo simulations are presented to test the estimator using two one-dimensional models and for Lennard-Jones representations of Ne 13 . For finite kmax , using numerical methods, the calculated heat capacity is found to diverge at low temperatures for the potential functions studied in this work. Extrapolation methods enable useful results to be determined over a wide temperature range. Typeset using REVT...

J. P. Neirotti; David L. Freeman; J. D. Doll

1999-01-01T23:59:59.000Z

433

Obtaining Parton Distribution Functions from Self-Organizing Maps  

E-Print Network (OSTI)

We present an alternative algorithm to global fitting procedures to construct Parton Distribution Functions (PDFs) parametrizations. The proposed algorithm uses Self-Organizing Maps (SOMs) which at variance with the standard Neural Networks, are based on competitive-learning. SOMs generate a non-uniform projection from a high dimensional data s pace onto a low dimensional one (usually 1 or 2 dimensions) by clustering similar PDF representations together. The SOMs are trained on progressively narrower selections of data samples. The selection criterion is that of convergence towards a neighborhood of the experimental data. All available data sets on deep inelastic scattering in the kinematical region of 0.001 10 GeV^2 were implemented. The proposed fitting procedure, at variance with standard neural network approaches, allows for an increased control of the systematic bias by enabling the user to directly control the data selection procedure at various stages of the process.

Honkanen, H; Loitiere, Y C; Brogan, D; Reynolds, P

2006-01-01T23:59:59.000Z

434

Obtaining Parton Distribution Functions from Self-Organizing Maps  

E-Print Network (OSTI)

We present an alternative algorithm to global fitting procedures to construct Parton Distribution Functions (PDFs) parametrizations. The proposed algorithm uses Self-Organizing Maps (SOMs) which at variance with the standard Neural Networks, are based on competitive-learning. SOMs generate a non-uniform projection from a high dimensional data s pace onto a low dimensional one (usually 1 or 2 dimensions) by clustering similar PDF representations together. The SOMs are trained on progressively narrower selections of data samples. The selection criterion is that of convergence towards a neighborhood of the experimental data. All available data sets on deep inelastic scattering in the kinematical region of 0.001 10 GeV^2 were implemented. The proposed fitting procedure, at variance with standard neural network approaches, allows for an increased control of the systematic bias by enabling the user to directly control the data selection procedure at various stages of the process.

H. Honkanen; S. Liuti; Y. C. Loitiere; D. Brogan; P. Reynolds

2006-08-22T23:59:59.000Z

435

Efficient multi-energy generation portfolios for the future  

E-Print Network (OSTI)

This paper introduces the application of mean-variance portfolio theory to portfolios generating multiple forms of energy such as electricity, heating or cooling power. Portfolio theory has already been successfully applied to several cases of electricity generation planning. A general extension of this method to an arbitrary number of output energies will be developed in this paper. Instead of calculating means and variances from time series of historical data- as it is commonly done- a set of several possible scenarios is used. By this means, the model allows to appropriately take into account uncertainties about future developments, which may be able to alter the economic performance of the considered generation technologies. In order to illustrate the proposed method, the model is applied to a portfolio of distributed electricity and heat generation technologies. In so doing, it is shown how efficient risk-return combinations for multi-energy generation portfolios can be determined. 1

Florian Kienzle; Göran Andersson

2008-01-01T23:59:59.000Z

436

Teleporting squeezing: Optimization using non-Gaussian resources  

E-Print Network (OSTI)

We study the continuous-variable quantum teleportation of states, statistical moments of observables, and scale parameters such as squeezing. We investigate the problem both in ideal and imperfect Vaidman-Braunstein-Kimble protocol setups. We show how the teleportation fidelity is maximized and the difference between output and input variances is minimized by using suitably optimized entangled resources. Specifically, we consider the teleportation of coherent squeezed states, exploiting squeezed Bell states as entangled resources. This class of non-Gaussian states includes photon-added and photon-subtracted squeezed states as special cases. At variance with the case of entangled Gaussian resources, the use of entangled non-Gaussian squeezed Bell resources allows for different optimization procedures that lead to inequivalent results. Performing two independent optimization procedures one can either maximize the state teleportation fidelity, or minimize the difference between input and output quadrature varian...

Dell'Anno, F; Adesso, G; Illuminati, F

2010-01-01T23:59:59.000Z

437

Business cycles in oil economies  

SciTech Connect

This study examines the impact of oil price shocks on output fluctuations of several oil-exporting economies. In most studies of business cycles, the role of oil price is ignored; the few studies that use oil price as one of the variables in the system focus on modeling oil-importing economies. The vector autoregression (VAR) technique is used to consider the cases of Norway, Nigeria, and Mexico. Both atheoretical and structural' VARs are estimated to determine the importance of oil price impulses on output variations. The study reports two types of results: variance decomposition and impulse response functions, with particular emphasis on the issues of stationarity and co-integration among the series. The empirical results suggest that shocks to oil price are important in explaining output variations. In most cases, shocks to oil price are shown to explain more than 20% of the forecast variance of output over a 40-quarter horizon.

Al-Mutairi, N.H.

1991-01-01T23:59:59.000Z

438

Current-Voltage Characteristics and non-Gaussian fluctuations in two different protein light receptors  

E-Print Network (OSTI)

We investigate conductance and conductance fluctuations of two transmembrane proteins, bacteriorhodopsin and proteorhodopsin, belonging to the family of protein light receptors. These proteins are widely diffused in aqueous environments, are sensitive to visible light and are promising biomaterials for the realization of novel photodevices. The conductance exhibits a rapid increase at increasing applied voltages, over a threshold value. Around the threshold value the variance of conductance fluctuations shows a dramatic jump of about 5 orders of magnitude: conductance and variance behaviours trace a second order phase transition. Furthermore, the conductance fluctuations evidence a non-Gaussian behaviour with a probability density function (PDF) which follows a generalized Gumbel distribution, typical of extreme-value statistics. The theoretical model is validated on existing current-voltage measurements and the interpretation of the PDF of conductance fluctuations is proven to be in line with the microscopic mechanisms responsible of charge transport.

E. Alfinito; J. Pousset; L. Reggiani

2013-05-24T23:59:59.000Z

439

An assessment of the MCNP4C weight window  

Science Conference Proceedings (OSTI)

A new, enhanced weight window generator suite has been developed for MCNP version 4C. The new generator correctly estimates importances in either a user-specified, geometry-independent, orthogonal grid or in MCNP geometric cells. The geometry-independent option alleviates the need to subdivide the MCNP cell geometry for variance reduction purposes. In addition, the new suite corrects several pathologies in the existing MCNP weight window generator. The new generator is applied in a set of five variance reduction problems. The improved generator is compared with the weight window generator applied in MCNP4B. The benefits of the new methodology are highlighted, along with a description of its limitations. The authors also provide recommendations for utilization of the weight window generator.

Christopher N. Culbertson; John S. Hendricks

1999-12-01T23:59:59.000Z

440

A SEARCH FOR CONCENTRIC CIRCLES IN THE 7 YEAR WILKINSON MICROWAVE ANISOTROPY PROBE TEMPERATURE SKY MAPS  

SciTech Connect

In this Letter, we search for concentric circles with low variance in cosmic microwave background sky maps. The detection of such circles would hint at new physics beyond the current cosmological concordance model, which states that the universe is isotropic and homogeneous, and filled with Gaussian fluctuations. We first describe a set of methods designed to detect such circles, based on matched filters and {chi}{sup 2} statistics, and then apply these methods to the best current publicly available data, the 7 year Wilkinson Microwave Anisotropy Probe (WMAP) temperature sky maps. We compare the observations with an ensemble of 1000 Gaussian {Lambda}CDM simulations. Based on these tests, we conclude that the WMAP sky maps are fully compatible with the Gaussian and isotropic hypothesis as measured by low-variance ring statistics.

Wehus, I. K. [Department of Physics, University of Oslo, P.O. Box 1048 Blindern, N-0316 Oslo (Norway); Eriksen, H. K., E-mail: i.k.wehus@fys.uio.no [Institute of Theoretical Astrophysics, University of Oslo, P.O. Box 1029 Blindern, N-0315 Oslo (Norway)

2011-06-01T23:59:59.000Z

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441

Contribution of the Home Environment to Preschool Children's Emergent Literacy Skills  

E-Print Network (OSTI)

Recent and ongoing research has demonstrated the alarming likelihood of children from low-income homes and from ethnic minorities to read at much lower reading levels than their peers. Additionally, reading ability is related to the earliest of emergent literacy skills, which can be measured in young children before they enter formal schooling. The home environment, including the available resources, support for literacy and school, and the parent-child relationship, plays an important role in promoting the development of emergent literacy skills. More research is needed, however, to inform programs and researchers about the specific relationship between the home environment and emergent literacy development. The current study was conducted using a sample of 122 preschool children enrolled in ERF enriched preschool classrooms in one school located in a Southwestern state. The study investigated the power of three variables of the home literacy environment (HLE) (i.e., Family Reading and Writing, External Resources, and Daily Activities) to predict three emergent literacy outcomes (i.e., receptive oral language, alphabet knowledge, and name writing) using canonical correlation analysis (CCA). The study also used commonality regression analysis to examine the shared and unique variance in these emergent literacy outcomes accounted for by the variables of the HLE and the parent-child relationship. The results of the CCA did not find the variables of the HLE to have a statistically significant relationship with the emergent literacy outcomes. Missing data techniques were used to account for incomplete data, and he results were closer to obtaining statistical significance when the more advanced method of multiple imputation was used to account for missing data, with the p-value decreasing from .751 with listwise deletion to between .094 and .504 with multiple imputation. The second analysis of the study, the commonality regression analysis, did find home variables to account for unique and shared variance in the emergent literacy outcomes, particularly in preschool name writing. Specifically, the External Resources scale of the Familia Inventory (Taylor, 2000) uniquely accounted for the smallest amount of variance (i.e., .1 percent) in name writing, while the scores of the PCRI uniquely accounted for the largest amount of variance (i.e., 3.4 percent). When combined together, however, the predictor variables accounted for larger amounts of variance in name writing ability. The Familia Inventory scale of External Resources accounted for the smallest amount of variance when combined with the other predictor variables (i.e., 21.5 percent) while the scores on the PCRI accounted for the largest combined amount of variance, accounting for 31.4 percent of the variance in name writing ability. These results complement and extend on existing research. The findings, limitations, and implications of the results of this study are discussed.

Haynes, Rebekah

2010-08-01T23:59:59.000Z

442

Automatic Estimation of the Radiological Inventory for the Dismantling of Nuclear Facilities  

Science Conference Proceedings (OSTI)

The estimation of the radiological inventory of Nuclear Facilities to be dismantled is a process that included information related with the physical inventory of all the plant and radiological survey. Estimation of the radiological inventory for all the components and civil structure of the plant could be obtained with mathematical models with statistical approach. A computer application has been developed in order to obtain the radiological inventory in an automatic way. Results: A computer application that is able to estimate the radiological inventory from the radiological measurements or the characterization program has been developed. In this computer applications has been included the statistical functions needed for the estimation of the central tendency and variability, e.g. mean, median, variance, confidence intervals, variance coefficients, etc. This computer application is a necessary tool in order to be able to estimate the radiological inventory of a nuclear facility and it is a powerful tool for decision taken in future sampling surveys.

Garcia-Bermejo, R.; Felipe, A.; Gutierrez, S.; Salas, E. [Iberdrola Ingenieria y Construccion (Spain); Martin, N. [ENRESA (Spain)

2008-01-15T23:59:59.000Z

443

Unspoken cultural influence: Exposure to and influence of nonverbal bias  

E-Print Network (OSTI)

The authors examined the extent to which nonverbal behavior contributes to culturally shared attitudes and beliefs. In Study 1, especially slim women elicited especially positive nonverbal behaviors in popular television shows. In Study 2, exposure to this nonverbal bias caused women to have especially slim cultural and personal ideals of female beauty and to have especially positive attitudes toward slim women. In Study 3, individual differences in exposure to such nonverbal bias accounted for substantial variance in pro-slim attitudes, anti-fat attitudes, and personal ideals of beauty, even after controlling for several third variables. In Study 4, regional differences in exposure to nonverbal bias accounted for substantial variance in regional unhealthy dieting behaviors, even after controlling for several third variables.

Max Weisbuch; Nalini Ambady

2009-01-01T23:59:59.000Z

444

Distribution of annihilation luminosities in dark matter substructure  

SciTech Connect

We calculate the probability distribution function (PDF) of the expected annihilation luminosities of dark matter subhalos as a function of subhalo mass and distance from the Galactic center using a semianalytical model of halo evolution. We find that the PDF of luminosities is relatively broad, exhibiting a spread of as much as an order of magnitude at fixed subhalo mass and halo-centric distance. The luminosity PDF allows for simple construction of mock samples of {gamma}-ray luminous subhalos and assessment of the variance in the predicted {gamma}-ray signals from dark matter annihilation. Other applications include quantifying the variance among the expected luminosities of dwarf spheroidal galaxies, assessing the level at which dark matter annihilation can be a contaminant in the expected {gamma}-ray signal from other astrophysical sources, as well as estimating the level at which nearby subhalos can contribute to the antimatter flux.

Koushiappas, Savvas M. [Department of Physics, Brown University, 182 Hope Street, Providence, Rhode Island 02912 (United States); Zentner, Andrew R. [Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (United States); Kravtsov, Andrey V. [Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637 (United States); Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States); Department of Astronomy and Astrophysics, University of Chicago, Chicago, Illinois 60605 (United States)

2010-10-15T23:59:59.000Z

445

Experimental study of variations in background radiation and the effect on Nuclear Car Wash sensitivity  

Science Conference Proceedings (OSTI)

Error rates in a cargo screening system such as the Nuclear Car Wash [1-7] depend on the standard deviation of the background radiation count rate. Because the Nuclear Car Wash is an active interrogation technique, the radiation signal for fissile material must be detected above a background count rate consisting of cosmic, ambient, and neutron-activated radiations. It was suggested previously [1,6] that the Corresponding negative repercussions for the sensitivity of the system were shown. Therefore, to assure the most accurate estimation of the variation, experiments have been performed to quantify components of the actual variance in the background count rate, including variations in generator power, irradiation time, and container contents. The background variance is determined by these experiments to be a factor of 2 smaller than values assumed in previous analyses, resulting in substantially improved projections of system performance for the Nuclear Car Wash.

Church, J; Slaughter, D; Norman, E; Asztalos, S; Biltoft, P

2007-02-07T23:59:59.000Z

446

Assessment of the Geothermal Development of Mexico  

DOE Green Energy (OSTI)

Mexico, with a 60 million population has an extension of almost 2 million square kilometers. A large number of volcanoes and hydrothermal manifestations are found in the area, particularly along the Pacific Coast. The electricity needs of this country require its installed capacity to be doubled every eight-and-a-half years. Although its main energy source is the hydrocarbons, new sources of energy are being investigated and developed. In 1973, at Cerro Prieto, a 75 MW plant was inaugurated utilizing geothermal steam, initiating in this way commercial exploitation of this energy. From there on an uninterrupted program of exploration and development has been followed, along and across the country. Probably the region with the highest potential of geothermal energy is the New-volcanic Belt, a zone 300 kilometers wide which crosses the country from the Pacific Coast to the Gulf of Mexico Coast. In this zone, the geothermal fields of Los Azufres, Los Negritos, Ixtlan de los Hervores, La Primavera and San Marcos are located. Sixteen wells have been drilled at Los Azufres, 14 good producers with an average temperature of 275 C. An area of 385 square kilometers is estimated can be exploited for steam production. By 1981, it is expected to have four wellhead turbogenerators rated 6 MW each. Two geothermal wells are now being drilled at La Primavera, with very good results. Temperatures of 275 C have been found at a depth of 800 m in the first well of the Rio Caliente module. The first two wells are now being drilled at Los Humeros geothermal zone. To date, 80 wells have been drilled at Cerro Prieto. In the last group of wells the producing stratum was found at a depth between 2000 and 3000 m. The temperature of this stratum is about 340 C, and each well has an average output of 200 tons per hour. Research is now being conducted to solve the problems encountered of casing corrosion, and for the development of better cementing materials and improved cementing techniques, since the results obtained have not been entirely satisfactory, being the life of the geothermal wells shortened, increasing the cost of power generation. Since its inauguration in 1973, Cerro Prieto has been generating electricity continuously, with increasing annual plant factors, better than 90 percent in the last three years. As of this date, the installed capacity at Cerro Prieto is 150 MW. The installation of a fifth unit of 30 MW is now underway. This unit will utilize low pressure steam flashed from the separated water, now being discarded from units 1 to 4. A flashing plant is currently being installed for this purpose. This means a 20 percent increase without drilling more wells. Future plans are the construction of two more plants of 200 MW each, for a total of 620 MW for May 1983. These units will be operating at slightly higher pressures than the existing ones. It is estimated that a total capacity of 40,000 MW could be installed by the year 2000, using steam obtained from the known geothermal areas of Mexico.

Dominguez, B.; Bermejo, F.; Guiza, J.

1980-12-01T23:59:59.000Z

447

Part II - The effect of data on waste behaviour: The South African waste information system  

SciTech Connect

Highlights: Black-Right-Pointing-Pointer This empirical study explores the relationship between data and resultant waste knowledge. Black-Right-Pointing-Pointer The study shows that 'Experience, Data and Theory' account for 54.1% of the variance in knowledge. Black-Right-Pointing-Pointer A strategic framework for Municipalities emerged from this study. - Abstract: Combining the process of learning and the theory of planned behaviour into a new theoretical framework provides an opportunity to explore the impact of data on waste behaviour, and consequently on waste management, in South Africa. Fitting the data to the theoretical framework shows that there are only three constructs which have a significant effect on behaviour, viz experience, knowledge, and perceived behavioural control (PBC). Knowledge has a significant influence on all three of the antecedents to behavioural intention (attitude, subjective norm and PBC). However, it is PBC, and not intention, that has the greatest influence on waste behaviour. While respondents may have an intention to act, this intention does not always manifest as actual waste behaviour, suggesting limited volitional control. The theoretical framework accounts for 53.7% of the variance in behaviour, suggesting significant external influences on behaviour not accounted for in the framework. While the theoretical model remains the same, respondents in public and private organisations represent two statistically significant sub-groups in the data set. The theoretical framework accounts for 47.8% of the variance in behaviour of respondents in public waste organisations and 57.6% of the variance in behaviour of respondents in private organisations. The results suggest that respondents in public and private waste organisations are subject to different structural forces that shape knowledge, intention, and resultant waste behaviour.

Godfrey, Linda [CSIR, Natural Resources and the Environment, PO Box 395, Pretoria 0001 (South Africa); University of KwaZulu-Natal, CRECHE - Centre for Research in Environmental, Coastal and Hydrological Engineering, School of Engineering, Durban 4041 (South Africa); Scott, Dianne [University of KwaZulu-Natal, School of Development Studies, Durban 4041 (South Africa); Difford, Mark [Nelson Mandela Metropolitan University, Port Elizabeth 6031 (South Africa); Trois, Cristina, E-mail: troisc@ukzn.ac.za [University of KwaZulu-Natal, CRECHE - Centre for Research in Environmental, Coastal and Hydrological Engineering, School of Engineering, Durban 4041 (South Africa)

2012-11-15T23:59:59.000Z

448

On the reliability of negative heat capacity measurements  

E-Print Network (OSTI)

A global protocol for the thermostatistical analysis of hot nuclear sources is discussed. Within our method of minimization of variances we show that the abnormal kinetic energy fluctuation signal recently reported in different experimental data (M.D'Agostino et al.-Phys. Lett. B 473 (2000) 219, N. Le Neindre et al.- contr. to the XXXVIII Bormio Winter Meeting on Nucl. Phys. (2001) 404) is a genuine signal of a first order phase transition in a finite system.

M. D'Agostino; R. Bougault; F. Gulminelli; M. Bruno; F. Cannata; Ph. Chomaz; F. Gramegna; I. Iori; N. Le Neindre; G. V. Margagliotti; A. Moroni; G. Vannini

2001-04-25T23:59:59.000Z

449

Transmittivity measurements by means of squeezed vacuum light  

E-Print Network (OSTI)

A method for measuring the transmittivity of optical samples by using squeezed--vacuum radiation is illustrated. A squeezed vacuum field generated by a below--threshold optical parametric oscillator is propagated through a nondispersive medium and detected by a homodyne apparatus. The variance of the detected quadrature is used for measuring the transmittivity. With this method it is drastically reduced the number of photons passing through the sample during the measurement interval. The results of some tests are reported.

V. D'Auria; C. de Lisio; A. Porzio; S. Solimeno; M. G. A. Paris

2006-01-25T23:59:59.000Z

450

ONE-DIMENSIONAL ARRAYS OF OSCILLATORS: ENERGY LOCALIZATION IN THERMAL EQUILIBRIUM  

E-Print Network (OSTI)

All systems in thermal equilibrium exhibit a spatially variable energy landscape due to thermal fluctuations. Thus at any instant there is naturally a thermodynamically driven localization of energy in parts of the system relative to other parts of the system. The specific characteristics of the spatial landscape such as, for example, the energy variance, depend on the thermodynamic properties of the system and vary from one system to another. The temporal persistence of a given energy landscape, that is,

Ramon Reigada; Aldo H. Romero; Antonio Sarmiento; Katja Lindenberg

2008-01-01T23:59:59.000Z

451

Testing the normality of the gravitational wave data with a low cost recursive estimate of the kurtosis  

E-Print Network (OSTI)

We propose a monitoring indicator of the normality of the output of a gravitational wave detector. This indicator is based on the estimation of the kurtosis (i.e., the 4th order statistical moment normalized by the variance squared) of the data selected in a time sliding window. We show how a low cost (because recursive) implementation of such estimation is possible and we illustrate the validity of the presented approach with a few examples using simulated random noises.

E. Chassande-Mottin

2002-12-02T23:59:59.000Z

452

Status of MARS Code  

SciTech Connect

Status and recent developments of the MARS 14 Monte Carlo code system for simulation of hadronic and electromagnetic cascades in shielding, accelerator and detector components in the energy range from a fraction of an electronvolt up to 100 TeV are described. these include physics models both in strong and electromagnetic interaction sectors, variance reduction techniques, residual dose, geometry, tracking, histograming. MAD-MARS Beam Line Build and Graphical-User Interface.

N.V. Mokhov

2003-04-09T23:59:59.000Z

453

The equilibrium probability distribution of a conductive sphere's floating charge in a collisionless, drifting Maxwellian plasma  

E-Print Network (OSTI)

A dust grain in a plasma has a fluctuating electric charge, and past work concludes that spherical grains in a stationary, collisionless plasma have an essentially Gaussian charge probability distribution. This paper extends that work to flowing plasmas and arbitrarily large spheres, deriving analytic charge probability distributions up to normalizing constants. We find that these distributions also have good Gaussian approximations, with analytic expressions for their mean and variance.

Thomas, Drew M

2013-01-01T23:59:59.000Z

454

Fractional dynamics in the L\\'evy quantum kicked rotor  

E-Print Network (OSTI)

We investigate the quantum kicked rotor in resonance subjected to momentum measurements with a L\\'evy waiting time distribution. We find that the system has a sub-ballistic behavior. We obtain an analytical expression for the exponent of the power law of the variance as a function of the characteristic parameter of the L\\'evy distribution and connect this anomalous diffusion with a fractional dynamics.

Romanelli, Alejandro

2008-01-01T23:59:59.000Z

455

Fractional dynamics in the Lévy quantum kicked rotor  

E-Print Network (OSTI)

We investigate the quantum kicked rotor in resonance subjected to momentum measurements with a L\\'evy waiting time distribution. We find that the system has a sub-ballistic behavior. We obtain an analytical expression for the exponent of the power law of the variance as a function of the characteristic parameter of the L\\'evy distribution and connect this anomalous diffusion with a fractional dynamics.

Alejandro Romanelli

2008-04-15T23:59:59.000Z

456

Stochastic Analysis of Transient Flow in Heterogeneous, Variably Saturated Porous Media: The van GenuchtenMualem Constitutive Model  

E-Print Network (OSTI)

of the van Genuchten­Mualem constitu- (e.g., Yeh et al., 1985a,b; Russo, 1993, 1995a,b; Yang ettive-textured soils with a shallow water table. More the pressure head variance. It is found that the pressure head­saturatedbe ignored. flow (Li and Yeh, 1998; Ferrante and Yeh, 1999; Zhang and Lu, 2002). To describe unsaturated flow

Lu, Zhiming

457

Effects Of Milling On Surface Integrity Of Low-Carbon Steel  

Science Conference Proceedings (OSTI)

This work measured the effect of milling parameters on the surface integrity of low-carbon alloy steel. The Variance Analysis showed that only depth of cut did not influence on the workpiece roughness and the Pearson's Coefficient indicated that cutting speed was more influent than tool feed. All cutting parameters introduced tensile residual stress in workpiece surface. The chip formation mechanism depended specially on cutting speed and influenced on the roughness and residual stress of workpiece.

Rodrigues, Alessandro Roger; Matsumoto, Hidekasu; Yamakami, Wyser Jose; Tokimatsu, Ruis Camargo; Menezes, Miguel Angelo; Suyama, Daniel Iwao; Norcino, Adriana Bruno; Vendrame, Saimon [UNESP-Univ Estatual Paulista, Engineering Faculty of Ilha Solteira, Av. Brasil Centro, 56-Zip Code 15.385-000-Ilha Solteira, Sao Paulo (Brazil)

2011-01-17T23:59:59.000Z

458

How do correlation and . . .  

E-Print Network (OSTI)

Combining multiple information sources such as subbands, streams (with diferent features) and multi modal data has shown to be a very promising trend, both in experiments and to some extend in real-life biometric authentication applications. Despite considerable efforts in fusions, there is a lack of understanding on the roles and effects of correlation and variance (of both the client and impostor scores of base-classifiers/experts). Often, scores are assumed to be independent. In this paper, we explicitly consider this factor using a theoretical model, called Variance Reduction-Equal Error Rate (VR-EER) analysis. Assuming that client and impostor scores are approximately Gaussian distributed, we showed that Equal Error Rate (EER) can be modeled as a function of F-ratio, which itself is a function of 1) correlation, 2) variance of base-experts and 3) difference of client and impostor means. To achieve lower EER, smaller correlation and average variance of base-experts, and larger mean difference are desirable. Furthermore, analysing any of these factors independently, e.g. focusing on correlation alone, could be miss-leading. Experimental results on the BANCA and XM2VTS multi-modal databases and NIST 2001 speaker verification database confirm our findings using VR-EER analysis. Furthermore, F-ratio is shown to be a valid criterion in place of EER as an evaluation criterion. We analysed four commonly encountered scenarios in biometric authentication which include fusing correlated/uncorrelated base-experts of similar/different performances. The analysis explains and shows that fusing systems of different performances is not always beneficial. One of the most important findings is that positive correlation "hurts" fusion while negative correlation (greater "diversity", which...

Norman Poh Hoon Thian; et al.

2004-01-01T23:59:59.000Z

459

How random is your heart beat?  

E-Print Network (OSTI)

We measure the content of random uncorrelated noise in heart rate variability using a general method of noise level estimation using a coarse grained entropy. We show that usually - except for atrial fibrillation - the level of such noise is within 5 - 15% of the variance of the data and that the variability due to the linearly correlated processes is dominant in all cases analysed but atrial fibrillation. The nonlinear deterministic content of heart rate variability remains significant and may not be ignored.

Urbanowicz, K; Holyst, J A; Zebrowski, J J

2006-01-01T23:59:59.000Z

460

Missing data outside the detector range: application to continuous variable entanglement verification and quantum cryptography  

E-Print Network (OSTI)

In continuous-variable quantum information processing detectors are necessarily coarse grained and of finite range. We discuss how especially the latter feature is a bug and may easily lead to overoptimistic estimates of entanglement and of security, when missed data outside the detector range are ignored. We show that entropic separability or security criteria are much superior to variance-based criteria for mitigating the negative effects of this bug.

Megan R. Ray; S. J. van Enk

2013-02-20T23:59:59.000Z

Note: This page contains sample records for the topic "variance stratum stratum3" 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

Comparison of HEU Measurements Using Measured and Simulated Data  

SciTech Connect

Correlated neutron data analyzed using the Feynman Variance-to-Mean method are can be used to assess the multiplication and mass of special nuclear material (SNM) systems. After list-mode data are acquired, the multiplication and mass can be determined using detector parameters. This work compares data sets that were measured to simulated data using recent MCNP list-mode modifications. In addition, both sets of data are analyzed using both measured and simulated parameters to infer the system multiplication.

Hutchinson, Jesson D. [Los Alamos National Laboratory; Sood, Avneet [Los Alamos National Laboratory; Smith-Nelson, Mark A. [Los Alamos National Laboratory; Dinwiddie, Derek R. [Los Alamos National Laboratory; Myers, William L. [Los Alamos National Laboratory

2012-06-19T23:59:59.000Z

462

A Comparison of Image Quality Evaluation Techniques for Transmission X-Ray Microscopy  

SciTech Connect

Beamline 6-2c at Stanford Synchrotron Radiation Lightsource (SSRL) is capable of Transmission X-ray Microscopy (TXM) at 30 nm resolution. Raw images from the microscope must undergo extensive image processing before publication. Since typical data sets normally contain thousands of images, it is necessary to automate the image processing workflow as much as possible, particularly for the aligning and averaging of similar images. Currently we align images using the 'phase correlation' algorithm, which calculates the relative offset of two images by multiplying them in the frequency domain. For images containing high frequency noise, this algorithm will align noise with noise, resulting in a blurry average. To remedy this we multiply the images by a Gaussian function in the frequency domain, so that the algorithm ignores the high frequency noise while properly aligning the features of interest (FOI). The shape of the Gaussian is manually tuned by the user until the resulting average image is sharpest. To automatically optimize this process, it is necessary for the computer to evaluate the quality of the average image by quantifying its sharpness. In our research we explored two image sharpness metrics, the variance method and the frequency threshold method. The variance method uses the variance of the image as an indicator of sharpness while the frequency threshold method sums up the power in a specific frequency band. These metrics were tested on a variety of test images, containing both real and artificial noise. To apply these sharpness metrics, we designed and built a MATLAB graphical user interface (GUI) called 'Blur Master.' We found that it is possible for blurry images to have a large variance if they contain high amounts of noise. On the other hand, we found the frequency method to be quite reliable, although it is necessary to manually choose suitable limits for the frequency band. Further research must be performed to design an algorithm which automatically selects these parameters.

Bolgert, Peter J; /Marquette U. /SLAC

2012-08-31T23:59:59.000Z

463

A Database of Woody Vegetation Responses to Elevated Atmospheric CO2  

SciTech Connect

To perform a statistically rigorous meta-analysis of research results on the response by woody vegetation to increased atmospheric CO2 levels, a multiparameter database of responses was compiled. Eighty-four independent CO2-enrichment studies, covering 65 species and 35 response parameters, met the necessary criteria for inclusion in the database: reporting mean response, sample size, and variance of the response (either as standard deviation or standard error). Data were retrieved from the published literature and unpublished reports.

Curtis, P.S.; Cushman, R.M.; Brenkert, A.L.

1999-09-01T23:59:59.000Z

464

Nonlocality of Foldy-Wouthuysen and related transformations for the Dirac equation  

Science Conference Proceedings (OSTI)

Nonlocalities of Foldy-Wouthuysen and related transformations, which are used to separate positive- and negative-energy states in the Dirac equation, are investigated. Second moments of functional kernels generated by the transformations are calculated, and the transformed functions and their variances are computed. It is shown that all the transformed quantities are smeared in the coordinate space by an amount comparable to the Compton wavelength {lambda}{sub c}=({Dirac_h}/2{pi})/mc.

Rusin, Tomasz M. [Orange Customer Service sp. z o. o., ul. Twarda 18, PL-00-105 Warsaw (Poland); Zawadzki, Wlodek [Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, PL-02-688 Warsaw (Poland)

2011-12-15T23:59:59.000Z

465

Beyond long memory in heart rate variability: An approach based on fractionally integrated autoregressive moving average time series models with conditional heteroscedasticity  

Science Conference Proceedings (OSTI)

Heart Rate Variability (HRV) series exhibit long memory and time-varying conditional variance. This work considers the Fractionally Integrated AutoRegressive Moving Average (ARFIMA) models with Generalized AutoRegressive Conditional Heteroscedastic (GARCH) errors. ARFIMA-GARCH models may be used to capture and remove long memory and estimate the conditional volatility in 24 h HRV recordings. The ARFIMA-GARCH approach is applied to fifteen long term HRV series available at Physionet

2013-01-01T23:59:59.000Z

466

Information bias and lifetime mortality risks of radiation-induced cancer: Low LET radiation  

Science Conference Proceedings (OSTI)

Additive and multiplicative models of relative risk were used to measure the effect of cancer misclassification and DS86 random errors on lifetime risk projections in the Life Span Study (LSS) of Hiroshima and Nagasaki atomic bomb survivors. The true number of cancer deaths in each stratum of the cancer mortality cross-classification was estimated using sufficient statistics from the EM algorithm. Average survivor doses in the strata were corrected for DS86 random error ({sigma}=0.45) by use of reduction factors. Poisson regression was used to model the corrected and uncorrected mortality rates with risks in RERF Report 11 (Part 2) and the BEIR-V Report. Bias due to DS86 random error typically ranged from {minus}15% to {minus}30% for both sexes, and all sites and models. The total bias, including diagnostic misclassification, of excess risk of nonleukemia for exposure to 1 Sv from age 18 to 65 under the non-constant relative project model was {minus}37.1% for males and {minus}23.3% for females. Total excess risks of leukemia under the relative projection model were biased {minus}27.1% for males and {minus}43.4% for females. Thus, nonleukemia risks for 1 Sv from ages 18 to 65 (DRREF=2) increased from 1.91%/Sv to 2.68%/Sv among males and from 3.23%/Sv to 4.92%/Sv among females. Leukemia excess risk increased from 0.87%/Sv to 1.10/Sv among males and from 0.73%/Sv to 1.04/Sv among females. Bias was dependent on the gender, site, correction method, exposure profile and projection model considered. Future studies that use LSS data for US nuclear workers may be downwardly biased if lifetime risk projections are not adjusted for random and systematic errors.

Peterson, L.E.; Schull, W.J.; Davis, B.R. [Texas Univ., Houston, TX (United States). Health Science Center; Buffler, P.A. [California Univ., Berkeley, CA (United States). School of Public Health

1994-04-01T23:59:59.000Z

467

Acoustic telemetry.  

Science Conference Proceedings (OSTI)

Broadcasting messages through the earth is a daunting task. Indeed, broadcasting a normal telephone conversion through the earth by wireless means is impossible with todays technology. Most of us don't care, but some do. Industries that drill into the earth need wireless communication to broadcast navigation parameters. This allows them to steer their drill bits. They also need information about the natural formation that they are drilling. Measurements of parameters such as pressure, temperature, and gamma radiation levels can tell them if they have found a valuable resource such as a geothermal reservoir or a stratum bearing natural gas. Wireless communication methods are available to the drilling industry. Information is broadcast via either pressure waves in the drilling fluid or electromagnetic waves in the earth and well tubing. Data transmission can only travel one way at rates around a few baud. Given that normal Internet telephone modems operate near 20,000 baud, these data rates are truly very slow. Moreover, communication is often interrupted or permanently blocked by drilling conditions or natural formation properties. Here we describe a tool that communicates with stress waves traveling through the steel drill pipe and production tubing in the well. It's based on an old idea called Acoustic Telemetry. But what we present here is more than an idea. This tool exists, it's drilled several wells, and it works. Currently, it's the first and only acoustic telemetry tool that can withstand the drilling environment. It broadcasts one way over a limited range at much faster rates than existing methods, but we also know how build a system that can communicate both up and down wells of indefinite length.

Drumheller, Douglas Schaeffer; Kuszmaul, Scott S.

2003-08-01T23:59:59.000Z

468

Teleportation of squeezing: Optimization using non-Gaussian resources  

Science Conference Proceedings (OSTI)

We study the continuous-variable quantum teleportation of states, statistical moments of observables, and scale parameters such as squeezing. We investigate the problem both in ideal and imperfect Vaidman-Braunstein-Kimble protocol setups. We show how the teleportation fidelity is maximized and the difference between output and input variances is minimized by using suitably optimized entangled resources. Specifically, we consider the teleportation of coherent squeezed states, exploiting squeezed Bell states as entangled resources. This class of non-Gaussian states, introduced by Illuminati and co-workers [F. Dell'Anno, S. De Siena, L. Albano, and F. Illuminati, Phys. Rev. A 76, 022301 (2007); F. Dell'Anno, S. De Siena, and F. Illuminati, ibid. 81, 012333 (2010)], includes photon-added and photon-subtracted squeezed states as special cases. At variance with the case of entangled Gaussian resources, the use of entangled non-Gaussian squeezed Bell resources allows one to choose different optimization procedures that lead to inequivalent results. Performing two independent optimization procedures, one can either maximize the state teleportation fidelity, or minimize the difference between input and output quadrature variances. The two different procedures are compared depending on the degrees of displacement and squeezing of the input states and on the working conditions in ideal and nonideal setups.

Dell'Anno, Fabio; De Siena, Silvio; Illuminati, Fabrizio [Dipartimento di Matematica e Informatica, Universita degli Studi di Salerno, CNR-SPIN, Unita di Salerno, Consorzio Nazionale Italiano di Struttura della Materia (CNISM), Unita di Salerno, and Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Napoli-Gruppo Collegato di Salerno, Via Ponte don Melillo, I-84084 Fisciano (Italy); Adesso, Gerardo [School of Mathematical Sciences, University of Nottingham, University Park, Nottingham NG7 2RD (United Kingdom)

2010-12-15T23:59:59.000Z

469

Teleportation of squeezing: Optimization using non-Gaussian resources  

E-Print Network (OSTI)

We study the continuous-variable quantum teleportation of states, statistical moments of observables, and scale parameters such as squeezing. We investigate the problem both in ideal and imperfect Vaidman-Braunstein-Kimble protocol setups. We show how the teleportation fidelity is maximized and the difference between output and input variances is minimized by using suitably optimized entangled resources. Specifically, we consider the teleportation of coherent squeezed states, exploiting squeezed Bell states as entangled resources. This class of non-Gaussian states includes photon-added and photon-subtracted squeezed states as special cases. At variance with the case of entangled Gaussian resources, the use of entangled non-Gaussian squeezed Bell resources allows for different optimization procedures that lead to inequivalent results. Performing two independent optimization procedures one can either maximize the state teleportation fidelity, or minimize the difference between input and output quadrature variances. The two different procedures are compared depending on the degrees of displacement and squeezing of the input states and on the working conditions in ideal and non-ideal setups.

F. Dell'Anno; S. De Siena; G. Adesso; F. Illuminati

2010-09-30T23:59:59.000Z

470

Wind Farm Diversification and Its Impact on Power System Reliability  

E-Print Network (OSTI)

As wind exploitation gains prominence in the power industry, the extensive use of this intermittent source of power may heavily rely on our ability to select the best combination of wind farming sites that yields maximal reliability of power systems at minimal cost. This research proposes a general method to minimize the wind park global power output variance by optimally distributing a predetermined number of wind turbines over a preselected number of potential wind farming sites for which the wind patterns are statistically known. The objective is to demonstrate the benefits of diversification for the reliability of wind-sustained systems through the search for steadier overall power outputs. Three years of wind data from the recent NREL/3TIER study in the western US provides the statistics for evaluating each site for their mean power output, variance and correlation with each other so that the best allocations can be determined. Some traditional reliability indices such as the LOLP are computed by using sequential Monte Carlo simulations to emulate the behavior of a power system uniquely composed of wind turbines and a load modeled from the 1996 IEEE RTS. It is shown that configurations featuring minimal global power output variances generally prove the most reliable for moderate load cases, provided the sites are not significantly correlated with the modeled load. Under these conditions, the choice of uncorrelated/negatively correlated sites is favored. The correlations between the optimized global wind power outputs and the modeled load are studied as well.

Degeilh, Yannick

2009-08-01T23:59:59.000Z

471

Lifestyle Factors in U.S. Residential Electricity Consumption  

Science Conference Proceedings (OSTI)

A multivariate statistical approach to lifestyle analysis of residential electricity consumption is described and illustrated. Factor analysis of selected variables from the 2005 U.S. Residential Energy Consumption Survey (RECS) identified five lifestyle factors reflecting social and behavioral choices associated with air conditioning, laundry usage, personal computer usage, climate zone of residence, and TV use. These factors were also estimated for 2001 RECS data. Multiple regression analysis using the lifestyle factors yields solutions accounting for approximately 40% of the variance in electricity consumption for both years. By adding the associated household and market characteristics of income, local electricity price and access to natural gas, variance accounted for is increased to approximately 54%. Income contributed only {approx}1% unique variance to the 2005 and 2001 models, indicating that lifestyle factors reflecting social and behavioral choices better account for consumption differences than income. This was not surprising given the 4-fold range of energy use at differing income levels. Geographic segmentation of factor scores is illustrated, and shows distinct clusters of consumption and lifestyle factors, particularly in suburban locations. The implications for tailored policy and planning interventions are discussed in relation to lifestyle issues.

Sanquist, Thomas F.; Orr, Heather M.; Shui, Bin; Bittner, Alvah C.

2012-03-30T23:59:59.000Z

472

Organic scintillation detector response simulation using non-analog MCNPX-PoliMi  

Science Conference Proceedings (OSTI)

Organic liquid scintillation detectors are valuable for the detection of special nuclear material since they are capable of detecting both neutrons and gamma rays. Scintillators can also provide energy information which is helpful in identification and characterization of the source. In order to design scintillation based measurement systems appropriate simulation tools are needed. MCNPX-PoliMi is capable of simulating scintillation detector response; however, simulations have traditionally been run in analog mode which leads to long computation times. In this paper, non-analog MCNPX-PoliMi mode which uses variance reduction techniques is applied and tested. The non-analog MCNPX-PoliMi simulation test cases use source biasing, geometry splitting and a combination of both variance reduction techniques to efficiently simulate pulse height distribution and then time-of-flight for a heavily shielded case with a {sup 252}Cf source. An improvement factor (I), is calculated for distributions in each of the three cases above to analyze the effectiveness of the non-analog MCNPX-PoliMi simulations in reducing computation time. It is found that of the three cases, the last case which uses a combination of source biasing and geometry splitting shows the most improvement in simulation run time for the same desired variance. For pulse height distributions speedup ranging from a factor 5 to 25 is observed, while for time-of-flights the speedup factors range from 3 to 10. (authors)

Prasad, S.; Clarke, S. D.; Pozzi, S. A.; Larsen, E. W. [Univ. of Michigan, 2355 Bonisteel Blvd., Ann Arbor, MI 48109 (United States)

2012-07-01T23:59:59.000Z

473

Reference wind speed distributions and height profiles for wind turbine design and performance evaluation applications. [USA  

DOE Green Energy (OSTI)

The purpose of this report is to provide a set of reference or standard values of wind profiles, wind speed distributions and their effects on wind turbine performance for engineering design applications. Based on measured Weibull distribution parameters, representative average, low, and high variance data are given for height profiles of mean, 25 percentile, and 75 percentile wind speeds; and for wind speed probability density (velocity frequency) functions and cumulative probability (velocity duration) functions at selected heights. Results of a sensitivity analysis of the dependence of wind turbine performance parameters on cut-in speed, and rated speed for various mean wind and wind variance regimes are also presented. Wind turbine performance is expressed in terms of capacity factor (ratio of mean power output to rated power) and recovery factor (ratio of mean energy output to energy theoretically available in the wind). The representative high, mean, and low variance cases were determined from calculated Weibull distributions at 140 sites across the Continental U.S., and all of the representative functions are evaluated at mean wind speeds of 4, 5, 6, 7, and 8 m/s at standard 10 m level.

Justus, C.G.; Hargraves, W.R.; Mikhail, A.

1976-08-01T23:59:59.000Z

474

Ocean heat transport in a Simple Ocean Data Assimilation (SODA): structure, mechanisms, and impacts on climate  

E-Print Network (OSTI)

level, the standard error of the intercept is underestimated whereas the standard error of the regression coefficients associated with the covariate of the intermediate level and the remaining crossed factor are overestimated. When the ignored crossed factor is at the intermediate level, only the standard error of the regression coefficients associated with the covariate of the bottom level is overestimated. In Study Two, longitudinal multilevel data were generated mirroring studies in which students are measured repeatedly and change schools over time. It was found that when the school level is modeled hierarchically above the student level rather than as a crossed factor, part of the variance at the school level is added to the student level, causing underestimation of the school-level variance and overestimation of the studentlevel variance and covariance. The standard errors of the intercept and the regression coefficients associated with the school-level predictors are underestimated, which may cause spurious significance for results. The findings of the dissertation enhanced our understanding of the functioning of CCREMs in both cross-sectional and longitudinal multilevel data. The findings can help researchers to determine when CCREMs should be used and to interpret their results with caution when they misspecify CCREMs.

Zheng, Yangxing

2007-08-01T23:59:59.000Z

475

Study of noise effects in electrical impedance tomography with resistor networks  

E-Print Network (OSTI)

We present a study of the numerical solution of the two dimensional electrical impedance tomography problem, with noisy measurements of the Dirichlet to Neumann map. The inversion uses parametrizations of the conductivity on optimal grids. The grids are optimal in the sense that finite volume discretizations on them give spectrally accurate approximations of the Dirichlet to Neumann map. The approximations are Dirichlet to Neumann maps of special resistor networks, that are uniquely recoverable from the measurements. Inversion on optimal grids has been proposed and analyzed recently, but the study of noise effects on the inversion has not been carried out. In this paper we present a numerical study of both the linearized and the nonlinear inverse problem. We take three different parametrizations of the unknown conductivity, with the same number of degrees of freedom. We obtain that the parametrization induced by the inversion on optimal grids is the most efficient of the three, because it gives the smallest standard deviation of the maximum a posteriori estimates of the conductivity, uniformly in the domain. For the nonlinear problem we compute the mean and variance of the maximum a posteriori estimates of the conductivity, on optimal grids. For small noise, we obtain that the estimates are unbiased and their variance is very close to the optimal one, given by the Cramer-Rao bound. For larger noise we use regularization and quantify the trade-off between reducing the variance and introducing bias in the solution. Both the full and partial measurement setups are considered.

Liliana Borcea; Fernando Guevara Vasquez; Alexander V. Mamonov

2011-05-05T23:59:59.000Z

476

Adaptive control of duty cycling in energy-harvesting wireless sensor networks  

E-Print Network (OSTI)

Increasingly many wireless sensor network deployments are using harvested environmental energy to extend system lifetime. Because the temporal profiles of such energy sources exhibit great variability due to dynamic weather patterns, an important problem is designing an adaptive duty-cycling mechanism that allows sensor nodes to maintain their power supply at sufficient levels (energy neutral operation) by adapting to changing environmental conditions. Existing techniques to address this problem are minimally adaptive and assume a priori knowledge of the energy profile. While such approaches are reasonable in environments that exhibit low variance, we find that it is highly inefficient in more variable scenarios. We introduce a new technique for solving this problem based on results from adaptive control theory and show that we achieve better performance than previous approaches on a broader class of energy source data sets. Additionally, we include a tunable mechanism for reducing the variance of the node’s duty cycle over time, which is an important feature in tasks such as event monitoring. We obtain reductions in variance as great as two-thirds without compromising task performance or ability to maintain energy neutral operation.

Christopher M. Vigorito; Deepak Ganesan; Andrew G. Barto

2007-01-01T23:59:59.000Z

477

Land Disposal Restrictions Treatment Standards: Compliance Strategies for Four Types of Mixed Wastes  

Science Conference Proceedings (OSTI)

This paper describes the unique challenges involved in achieving compliance with the Resource Conservation and Recovery Act (Public Law 94-580) Land Disposal Restrictions (LDR) treatment standards for four types of mixed wastes generated throughout the U.S. Department of Energy (DOE) complex: (1) radioactively contaminated lead acid batteries; (2) radioactively contaminated cadmium-, mercury-, and silver-containing batteries; (3) mercury-bearing mixed wastes; and (4) radioactive lead solids. For each of these mixed waste types, the paper identifies the strategy pursued by DOE's Office of Pollution Prevention and Resource Conservation Policy and Guidance (EH-43) in coordination with other DOE elements and the U.S. Environmental Protection Agency (EPA) to meet the compliance challenge. Specifically, a regulatory interpretation was obtained from EPA agreeing that the LDR treatment standard for wastes in the D008 'Radioactive Lead Solids' sub-category applies to radioactively contaminated lead acid batteries. For cadmium-, mercury-, and silver-containing batteries, generically applicable treatability variances were obtained from EPA approving macro-encapsulation as the alternative LDR treatment standard for all three battery types. Joint DOE/EPA technology demonstrations were pursued for mercury-bearing mixed wastes in an effort to justify revising the LDR treatment standards, which focus on thermal recovery of mercury for reuse. Because the demonstrations failed to produce enough supporting data for a rulemaking, however, EPA has recommended site-specific treatability variances for particular mercury-bearing mixed waste streams. Finally, DOE has filed an application for a determination of equivalent treatment requesting approval of container-based macro-encapsulation technologies as an alternative LDR treatment standard for radioactive lead solids. Information is provided concerning the length of time required to implement each of these strategies, and suggestions for obtaining variances from the LDR treatment standards at the site-specific level are also discussed. (authors)

Fortune, W.B. [U.S, Department of Energy, Office of Pollution Prevention and Resource Conservation (EH-43), 1000 Independence Ave., S.W., Washington, DC 20585 (United States); Ranek, N.L. [Argonne National Laboratory, Environmental Science Division, 955 L'Enfant Plaza North, Suite 6000, Washington, DC 20024 (United States)

2006-07-01T23:59:59.000Z

478

Freeway Short-Term Traffic Flow Forecasting by Considering Traffic Volatility Dynamics and Missing Data Situations  

E-Print Network (OSTI)

Short-term traffic flow forecasting is a critical function in advanced traffic management systems (ATMS) and advanced traveler information systems (ATIS). Accurate forecasting results are useful to indicate future traffic conditions and assist traffic managers in seeking solutions to congestion problems on urban freeways and surface streets. There is new research interest in short-term traffic flow forecasting due to recent developments in ITS technologies. Previous research involves technologies in multiple areas, and a significant number of forecasting methods exist in literature. However, forecasting reliability is not properly addressed in existing studies. Most forecasting methods only focus on the expected value of traffic flow, assuming constant variance when perform forecasting. This method does not consider the volatility nature of traffic flow data. This paper demonstrated that the variance part of traffic flow data is not constant, and dependency exists. A volatility model studies the dependency among the variance part of traffic flow data and provides a prediction range to indicate the reliability of traffic flow forecasting. We proposed an ARIMA-GARCH (Autoregressive Integrated Moving Average- AutoRegressive Conditional Heteroskedasticity) model to study the volatile nature of traffic flow data. Another problem of existing studies is that most methods have limited forecasting abilities when there is missing data in historical or current traffic flow data. We developed a General Regression Neural Network(GRNN) based multivariate forecasting method to deal with this issue. This method uses upstream information to predict traffic flow at the studied site. The study results indicate that the ARIMA-GARCH model outperforms other methods in non-missing data situations, while the GRNN model performs better in missing data situations.

Zhang, Yanru

2011-08-01T23:59:59.000Z

479

Low-frequency variability of currents in the deepwater eastern Gulf of Mexico  

E-Print Network (OSTI)

Vertical structure of the low frequency horizontal currents at the northern edge of the Loop Current during eddy shedding events is observed using concurrent hydrographic, moored, and satellite altimetry data from 2005. Dynamic modes are calculated at three deep (~3000 m), full water-column moorings in the eastern Gulf of Mexico. Time-series of the barotropic and first two baroclinic modes are found using a least squares minimization that fits theoretically derived modes to observed moored velocity data. EOF analyses show that the majority of observed variance is explained by a surface-trapped mode that is highly coherent with the temporal amplitudes of the first baroclinic mode, and a lower, but significant percentage of variance is captured in bottom-intensified modes. Amplitudes of the second empirical mode indicate that currents are more coherent in the ocean interior approaching the Loop Current, as more variance is explained by this mode at the southernmost mooring near the Loop Current. A dynamic mode decomposition of the horizontal currents reveals that the barotropic and first baroclinic modes exhibit low frequency variability and eddy time scales of 10 – 40 days. Second baroclinic mode amplitudes show higher frequency variability and shorter time scales. A model utility test for the least squares fit of modeled to observed velocity shows that the second baroclinic mode is useful to the statistical model during 50 – 85 % of the mooring deployment, and is particularly necessary to the model when cyclonic features are present in the study area. The importance of the second baroclinic mode to the model increases significantly closer to the Loop Current. High-speed currents associated with the Loop Current and anticyclones stimulate a strong first baroclinic response, but the second baroclinic mode amplitudes are found to be similar in magnitude to the first baroclinic mode amplitudes at times. This happens episodically and could be an indication of higher order dynamics related to frontal eddies or Loop Current eddy shedding.

Cole, Kelly Lynne

2008-08-01T23:59:59.000Z

480

NIETC  

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

Interest Electric Interest Electric Transmission Corridors National Interest Electric Transmission Corridors DOE Technical Conference March 29, 2006 Michael Robinson Project Manager, Tariff Studies and Regional Planning DOE Technical Conference March 29, 2006 Michael Robinson Project Manager, Tariff Studies and Regional Planning Southern's View on NIETC * Southern supports process because it has merit * Use existing transmission expansion plans and studies * Consider regional variances and reliability * Consult States and regional entities * Don't over-designate * Consider alternative solutions Regional Planning * Southern's Goal: To promote coordinated transmission planning on a regional basis to define near and long term transmission needs consistent with NERC reliability standards, applicable reliability agreements,

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481

Asymmetries in Inflation Expectation Formation Across Demographic Groups  

E-Print Network (OSTI)

, by reacting with a consistent delay. This over-reaction is also present after 9/11, but with the opposite sign. Figures 1(b) and 1(c) plot the dynamics of higher empirical moments against cycle and actual in?ation. The cross-sectional variance of in... as possible. Thus, we design an exercise in order to search for the best combination of gain and initial values to match each percentile.23 This strategy can also be regarded as a test for learning dynamics. If the gain is found to be positive under...

Pfajfar, D; Santoro, E

482

Electric and magnetic response to the continuum for A=7 isobars in a dicluster model  

E-Print Network (OSTI)

Mirror isobars $^7$Li and $^7$Be are investigated in a dicluster model. The magnetic dipole moments and the magnetic dipole response to the continuum are calculated in this framework. The magnetic contribution is found to be small with respect to electric dipole and quadrupole excitations even at astrophysical energies, at a variance with the case of deuteron. Energy weighted molecular sum rules are evaluated and a formula for the molecular magnetic dipole sum rule is found which matches the numerical calculations. Cross-sections for photo-dissociation and radiative capture as well as the S-factor for reactions of astrophysical significance are calculated with good agreement with known experimental data.

A. Mason; R. Chatterjee; L. Fortunato; A. Vitturi

2008-06-25T23:59:59.000Z

483

Sequential Monte Carlo simulation for composite power system reliability analysis with time varying loads  

SciTech Connect

The paper illustrates the development and utilization of an annual chronological load curve for each load bus in a composite generation and transmission system and a sequential Monte Carlo simulation approach for composite system reliability assessment. Antithetic variates as a variance reduction technique has been applied to the simulation model to increase the efficiency of the simulation. An approximate method using a load duration curve of the system load and an enumeration process have been applied to the developed load model and the results are compared in this paper.

Sankarakrishnan, A.; Billinton, R. [Univ. of Saskatchewan, Saskatoon, Saskatchewan (Canada). Power Systems Research Group

1995-08-01T23:59:59.000Z

484

An almost sure invariance principle for random walks in a space-time random environment  

E-Print Network (OSTI)

We consider a discrete time random walk in a space-time i.i.d. random environment. We use a martingale approach to show that the walk is diffusive in almost every fixed environment. We improve on existing results by proving an invariance principle and considering environments with an annealed $L^2$ drift. We also state an a.s. invariance principle for random walks in general random environments whose hypothesis requires a subdiffusive bound on the variance of the quenched mean, under an ergodic invariant measure for the environment chain.

F. Rassoul-Agha; T. Seppalainen

2004-11-26T23:59:59.000Z

485

Wheat Yield Functions for Analysis of Land-Use Change in China  

E-Print Network (OSTI)

CERES-Wheat, a dynamic process crop growth model is specified and validated for eight sites in the major wheat-growing regions of China. Crop model results are then used to test functional forms for yield response to nitrogen fertilizer, irrigation water, temperature, and precipitation. The resulting functions are designed to be used in a linked biophysical-economic model of land-use and land-cover change. Variables explaining a significant proportion of simulated yield variance are nitrogen, irrigation water, and precipitation; temperature was not a sig...

Chynthia Rosenzweig; Ana Iglesias; Yanhua Liu; Walter Baethgen (baethgen+aea-undp. Org. Uy; James W. Jones; Gordon J. Macdonald

1998-01-01T23:59:59.000Z

486

On the Effect of Random Alternating Perturbations on Hazard Rates  

E-Print Network (OSTI)

We consider a model for systems perturbed by dichotomous noise, in which the hazard rate function of a random lifetime is subject to additive time-alternating perturbations described by the telegraph process. This leads us to define a real-valued continuous-time stochastic process of alternating type expressed in terms of the integrated telegraph process for which we obtain the probability distribution, mean and variance. An application to survival analysis and reliability data sets based on confidence bands for estimated hazard rate functions is also provided.

Di Crescenzo, Antonio

2006-01-01T23:59:59.000Z

487

Impact on Grain Quality Parameters when Nitrogen Is `Sensor Applied' by the `Hydro Precise System'  

E-Print Network (OSTI)

Yield and grain quality maps have been produced at full-scale field trials within a 10.5 ha field for four different nitrogen strategies. Grain samples have been collected directly from the grain flow of a combine harvester and analysed for quality in the laboratory and merged with the yield meter registrations. Within the field great variance was observed in yield and grain quality. This paper evaluates the impact on yield and grain quality -- protein when nitrogen is sensor applied by the Hydro-Precise N-Sensor system. The results are discussed in terms of a potential new precision nitrogen application strategy for Danish winter wheat

R.N. Jørgensen; R. N. Jørgensen

2001-01-01T23:59:59.000Z

488

Readiness for self-directed learning and the cultural values of individualism/collectivism among American and South Korean college students seeking teacher certification in agriculture  

E-Print Network (OSTI)

The purpose of this study is to examine the relationship between self-directed learning readiness and the cultural values of individualism/collectivism in two sample groups drawn from different cultures. The research design used for this study was descriptive and correlational in nature. The target population for this study consisted of two sample groups: Korean and American college students who seek teacher certification in the field of agriculture. Data were collected using a web-formatted questionnaire. Results were computed statistically, including the means, standard deviations, effect size, independent sample t-test, one-way ANOVA, bivariate correlations, and multiple regression. Findings indicated that in a hierarchical multiple regression analysis, scores for the Self-Directed Learning Readiness Scale (SDLRS) (R2 = .03, adjusted R2 = .01, p = .30) in Step 1 was not statistically significantly related by gender, student classification, and GPA. Gender, student classification, and GPA accounted for only 3% of the variance and the three beta weights for the gender, student classification, and GPA variables were not statistically significantly related to the SDLRS. However, scores for SDLRS (R2= .34, adjusted R2 = .30, ¨R2 = .31, p =.00) in Step 2 was statistically significantly related by gender, student classification, GPA, nationality, vertical individualism (VI), horizontal individualism (HI), vertical collectivism(VC), and horizontal collectivism(HC). This model accounted for 34 % of the variance in the SDLRS (R2 change = .31). It appears that nationality, VI, HI, VC, and HC accounted for a further 31% of the variance. However, in Step 1, the gender, student classification, and GPA variables did not account for a significant amount of variance in Step 2. The beta weight for nationality and VI variables were not statistically significantly related to the SDLRS (E = -0.15, t = -1.67, p = .10; E = 0.01, t = 0.10, p = .92, respectively). However, the beta for the HI variable was statistically significant and positive (E = 0.40, t = 4.31, p = .00). The beta for the VC variable also was statistically significant and positive (E = 0.20, t = 2.12, p = .04). The beta for the HC variable also was statistically significant and positive (E = 0.21, t = 2.19, p = .03). These findings indicated that if HI, VC, and HC attitudes are high, the SDLRS scores tend to be high. That is, differences in the students� SDLRS can be best explained through HI, VC, and HC among the cultural values of individualism/collectivism.

Lee, In Heok

2004-12-01T23:59:59.000Z

489

Particle number fluctuations in nuclear collisions within excluded volume hadron gas model  

E-Print Network (OSTI)

The multiplicity fluctuations are studied in the van der Waals excluded volume hadron-resonance gas model. The calculations are done in the grand canonical ensemble within the Boltzmann statistics approximation. The scaled variances for positive, negative and all charged hadrons are calculated along the chemical freeze-out line of nucleus-nucleus collisions at different collision energies. The multiplicity fluctuations are found to be suppressed in the van der Waals gas. The numerical calculations are presented for two values of hard-core hadron radius, $r=0.3$ fm and 0.5 fm, as well as for the upper limit of the excluded volume suppression effects.

M. I. Gorenstein; M. Hauer; D. O. Nikolajenko

2007-02-26T23:59:59.000Z

490

Extrapolation method in the Monte Carlo Shell Model and its applications  

SciTech Connect

We demonstrate how the energy-variance extrapolation method works using the sequence of the approximated wave functions obtained by the Monte Carlo Shell Model (MCSM), taking {sup 56}Ni with pf-shell as an example. The extrapolation method is shown to work well even in the case that the MCSM shows slow convergence, such as {sup 72}Ge with f5pg9-shell. The structure of {sup 72}Se is also studied including the discussion of the shape-coexistence phenomenon.

Shimizu, Noritaka; Abe, Takashi [Department of Physics, University of Tokyo, Hongo, Tokyo 113-0033 (Japan); Utsuno, Yutaka [Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan); Mizusaki, Takahiro [Institute of Natural Sciences, Senshu University, Tokyo, 101-8425 (Japan); Otsuka, Takaharu [Department of Physics, University of Tokyo, Hongo, Tokyo 113-0033 (Japan); Center for Nuclear Study, University of Tokyo, Hongo, Tokyo 113-0033 (Japan); National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan (United States); Honma, Michio [Center for Mathematical Sciences, Aizu University, Aizu-Wakamatsu, Fukushima 965-8580 (Japan)

2011-05-06T23:59:59.000Z

491

www.vanderbilt.edu/econ Measuring the Economic Impact of Monetary Union:  

E-Print Network (OSTI)

Data from Okinawa’s monetary union with the United States in 1958 and with Japan in 1972 are used to obtain a quantitative indication of how monetary union might affect the behavior of nominal and real shocks across two economies. With monetary union, the variance of the real exchange rate between two economies declines, and their business cycle linkage becomes stronger. A VAR analysis of output and price data for Okinawa and Japan further indicates that the contribution of asymmetric nominal shocks in business cycles becomes smaller. Monetary union thus seems to facilitate both nominal and real convergence.

Shinji Takagi; Mototsugu Shintani; Tetsuro Okamoto; Shinji Takagi; Mototsugu Shintani; Tetsuro Okamoto

2003-01-01T23:59:59.000Z

492

Results of research to develop cost effective biomonitoring at oil shale lease tracts. Phase I. Fall sampling report  

SciTech Connect

This report presents the results of censuses conducted during October 1981 to estimate the fall abundance of small mammals and avifauna on replicate plots in the vicinity of Federal Tract C-a (Rio Blanco Oil Shale Company). The objectives of the fall censuses were to evaluate alternative census techniques, test assumptions vital to the use of indices and abundance estimators, determine cost-functions associated with monitoring efforts, and estimate variance components needed to devise optimal monitoring designs. Analyses of the fall census data on small mammal abundance were performed.

Skalski, J.R.; Fitzner, R.E.; Gano, K.A.

1982-05-01T23:59:59.000Z

493

Evidence of microscopic effects in fragment mass distribution in heavy ion induced fusion-fission reactions  

E-Print Network (OSTI)

Our measurements of variances ($\\sigma_{m}^2$) in mass distributions of fission fragments from fusion-fission reactions of light projectiles (C, O and F) on deformed thorium targets exhibit a sharp anomalous increase with energy near the Coulomb barrier, in contrast to the smooth variation of $\\sigma_{m}^2$ for the spherical bismuth target. This departure from expectation based on a statistical description is explained in terms of microscopic effects arising from the orientational dependence in the case of deformed thorium targets.

T. K. Ghosh; S. Pal; K. S. Gold; P. Bhattacharya

2005-06-27T23:59:59.000Z

494

Asymptotics for penalized additive B-spline regression  

E-Print Network (OSTI)

This paper is concerned with asymptotic theory for penalized spline estimator in bivariate additive model. The focus of this paper is put upon the penalized spline estimator obtained by the backfitting algorithm. The convergence of the algorithm as well as the uniqueness of its solution are shown. The asymptotic bias and variance of penalized spline estimator are derived by an efficient use of the asymptotic results for the penalized spline estimator in marginal univariate model. Asymptotic normality of estimator is also developed, by which an approximate confidence interval can be obtained. Some numerical experiments confirming theoretical results are provided.

Yoshida, T

2011-01-01T23:59:59.000Z

495

Accurate phase measurement with classical light  

E-Print Network (OSTI)

In this paper we investigate whether it is in general possible to substitute maximally path-entangled states, namely NOON-states by classical light in a Doppleron-type resonant multiphoton detection processes by studying adaptive phase measurement with classical light. We show that multiphoton detection probability using classical light coincides with that of NOON-states and the multiphoton absorbtion rate is not hindered by the spatially unconstrained photons of the classical light in our scheme. We prove that the optimal phase variance with classical light can be achieved and scales the same as that using NOON-states.

Sabine Wölk; Wenchao Ge; M. Suhail Zubairy

2012-11-13T23:59:59.000Z

496

Bounded limit for the Monte Carlo point-flux-estimator  

Science Conference Proceedings (OSTI)

In a Monte Carlo random walk the kernel K(R,E) is used as an expected value estimator at every collision for the collided flux phi/sub c/ r vector,E) at the detector point. A limiting value for the kernel is derived from a diffusion approximation for the probability current at a radius R/sub 1/ from the detector point. The variance of the collided flux at the detector point is thus bounded using this asymptotic form for K(R,E). The bounded point flux estimator is derived. (WHK)

Grimesey, R.A.

1981-01-01T23:59:59.000Z

497

Transport Test Problems for Hybrid Methods Development  

Science Conference Proceedings (OSTI)

This report presents 9 test problems to guide testing and development of hybrid calculations for the ADVANTG code at ORNL. These test cases can be used for comparing different types of radiation transport calculations, as well as for guiding the development of variance reduction methods. Cases are drawn primarily from existing or previous calculations with a preference for cases which include experimental data, or otherwise have results with a high level of confidence, are non-sensitive, and represent problem sets of interest to NA-22.

Shaver, Mark W.; Miller, Erin A.; Wittman, Richard S.; McDonald, Benjamin S.

2011-12-28T23:59:59.000Z

498

The data reduction pipeline for the Hi-GAL survey  

E-Print Network (OSTI)

We present the data reduction pipeline for the Hi-GAL survey. Hi-GAL is a key project of the Herschel satellite which is mapping the inner part of the Galactic plane (|l| pipeline relies only partially on the Herschel Interactive Standard Environment (HIPE) and features several newly developed routines to perform data reduction, including accurate data culling, noise estimation and minimum variance map-making, the latter performed with the ROMAGAL algorithm, a deep modification of the ROMA code already tested on cosmological surveys. We discuss in depth the properties of the Hi-GAL Science Demonstration Phase (SDP) data.

Traficante, A; Veneziani, M; Ali, B; de Gasperis, G; Di Giorgio, A M; Ikhenaode, D; Molinari, S; Natoli, P; Pestalozzi, M; Pezzuto, S; Piacentini, F; Piazzo, L; Polenta, G; Schisano, E

2011-01-01T23:59:59.000Z

499

Interaction-Flip Identities in Spin Glasses  

E-Print Network (OSTI)

We study the properties of fluctuation for the free energies and internal energies of two spin glass systems that differ for having some set of interactions flipped. We show that their difference has a variance that grows like the volume of the flipped region. Using a new interpolation method, which extends to the entire circle the standard interpolation technique, we show by integration by parts that the bound imply new overlap identities for the equilibrium state. As a side result the case of the non-interacting random field is analyzed and the triviality of its overlap distribution proved.

Pierluigi Contucci; Cristian Giardina; Claudio Giberti

2008-11-15T23:59:59.000Z

500

Safety criteria for organic watch list tanks at the Hanford Site  

SciTech Connect

This document reviews the hazards associated with the storage of organic complexant salts in Hanford Site high-level waste single- shell tanks. The results of this analysis were used to categorize tank wastes as safe, unconditionally safe, or unsafe. Sufficient data were available to categorize 67 tanks; 63 tanks were categorized as safe, and four tanks were categorized as conditionally safe. No tanks were categorized as unsafe. The remaining 82 SSTs lack sufficient data to be categorized.Historic tank data and an analysis of variance model were used to prioritize the remaining tanks for characterization.

Meacham, J.E., Westinghouse Hanford

1996-08-01T23:59:59.000Z