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Note: This page contains sample records for the topic "tox parameter tox" 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
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1

Using ToxCast ™ to Predict Chemicals Potential for Developmental,  

E-Print Network (OSTI)

Tens of thousands of chemicals are currently in commerce, and hundreds more are introduced every year. Because there are so many chemicals—and since traditional chemical toxicity tests using animals is expensive and time consuming—only a small fraction of chemicals have been fully assessed for potential risk. In 2007, EPA scientists began working on ToxCast, a research project to identify and prioritize potentially toxic chemicals using rapid, automated tests called in vitro assays. ToxCast is currently examining over 1,000 chemicals from a broad range of sources, including pesticides, industrial and consumer products, food additives and failed drugs that were never released to the market. Recently, EPA scientists published papers describing first generation predictive models (see graphic 1 for process of developing models) using ToxCast data. These models show how the ToxCast concept can be used to predict the potential for certain chemicals to be toxic to embryonic development, male and female reproductive function, and vascular development. The models support continued development of this new approach to chemical safety assessment.

Vascular Development Toxicity; Developmental Toxicity

2011-01-01T23:59:59.000Z

2

EU Framework 6 Project: Predictive Toxicology (PredTox)-overview and outcome  

SciTech Connect

In this publication, we report the outcome of the integrated EU Framework 6 Project: Predictive Toxicology (PredTox), including methodological aspects and overall conclusions. Specific details including data analysis and interpretation are reported in separate articles in this issue. The project, partly funded by the EU, was carried out by a consortium of 15 pharmaceutical companies, 2 SMEs, and 3 universities. The effects of 16 test compounds were characterized using conventional toxicological parameters and 'omics' technologies. The three major observed toxicities, liver hypertrophy, bile duct necrosis and/or cholestasis, and kidney proximal tubular damage were analyzed in detail. The combined approach of 'omics' and conventional toxicology proved a useful tool for mechanistic investigations and the identification of putative biomarkers. In our hands and in combination with histopathological assessment, target organ transcriptomics was the most prolific approach for the generation of mechanistic hypotheses. Proteomics approaches were relatively time-consuming and required careful standardization. NMR-based metabolomics detected metabolite changes accompanying histopathological findings, providing limited additional mechanistic information. Conversely, targeted metabolite profiling with LC/GC-MS was very useful for the investigation of bile duct necrosis/cholestasis. In general, both proteomics and metabolomics were supportive of other findings. Thus, the outcome of this program indicates that 'omics' technologies can help toxicologists to make better informed decisions during exploratory toxicological studies. The data support that hypothesis on mode of action and discovery of putative biomarkers are tangible outcomes of integrated 'omics' analysis. Qualification of biomarkers remains challenging, in particular in terms of identification, mechanistic anchoring, appropriate specificity, and sensitivity.

Suter, Laura, E-mail: Laura.suter-dick@roche.com [Hoffmann-La Roche AG, Basel (Switzerland); Schroeder, Susanne [Nycomed GmbH, Barsbuettel (Germany); Meyer, Kirstin [Bayer Schering Pharma AG, Berlin (Germany); Gautier, Jean-Charles [Sanofi aventis R and D, Disposition, Safety and Animal Research, Vitry sur Seine (France); Amberg, Alexander [Sanofi aventis R and D, Disposition, Safety and Animal Research, Frankfurt (Germany); Wendt, Maria; Gmuender, Hans [Genedata AG, Basel (Switzerland); Mally, Angela [University of Wuerzburg, Institut fuer Toxikologie, Wuerzburg (Germany); Boitier, Eric [Sanofi aventis R and D, Disposition, Safety and Animal Research, Vitry sur Seine (France); Ellinger-Ziegelbauer, Heidrun [Bayer Schering Pharma AG, Wuppertal (Germany); Matheis, Katja [Boehringer Ingelheim Pharma GmbH and Co. KG, Biberach (Germany); Pfannkuch, Friedlieb [Hoffmann-La Roche AG, Basel (Switzerland)

2011-04-15T23:59:59.000Z

3

CAirTOX: A compartment model for assessing the fate of and human exposure to toxic-chemical emissions to air  

Science Conference Proceedings (OSTI)

CAirTOX has been developed as a spreadsheet model to assist in making a risk assessment of toxic air emissions. With CAirTOX, one can address how contaminants released to an air basin can lead to contamination of soil, food, surface water, and sediments. The modeling effort includes a multimedia transport and transformation model, exposure scenario models, and efforts to quantify uncertainty in multimedia, multiple-pathway exposure assessments. The multimedia transport and transformation model is a steady-state, but non-equilibrium model that can be used to assess concentrations of contaminants released continuously to air. In Part 1, the authors describe the multimedia transport and transformation model used to determine the fate of air emissions. In Part 2, they describe inputs and data needs for CAirTOX and the development of a set of landscape factors, which can be used to represent regional air basin/water-shed systems in California. In Part 3, they describe the multiple-pathway exposure scenarios and exposure algorithms. In Part 4, they compare the HRA approach and results and the CAirTOX exposure equations. In Part 5, they consider model sensitivity and uncertainty to determine how variability and uncertainty in model inputs affects the precision, accuracy, and credibility of the model output.

McKone, T.E.

1993-10-01T23:59:59.000Z

4

Status of Multi-Pollutant Process Development: LoTOx/BOC, GSA/FLS, Pahlmanite Cost Projections  

Science Conference Proceedings (OSTI)

As the need for more stringent control of power plant emissions increases, so does the need for more cost-effective approaches to reducing these pollutants. Current methods employ technologies designed to reduce specific pollutants, which require combinations of different emission control systems. Some air pollution control suppliers and utilities are developing technologies that have the potential to reduce the emission rates for multiple pollutants simultaneously, with the goal of identifying integrate...

2003-06-16T23:59:59.000Z

5

CalTOX (registered trademark), A multimedia total exposure model spreadsheet user's guide. Version 4.0(Beta)  

E-Print Network (OSTI)

CR-3624, Sandia National Laboratories, Albuquerque, NM.Lawrence Berkeley National Laboratory report LBNL-47254. [for release in late Lawrence Berkeley National Laboratory

McKone, T.E.; Enoch, K.G.

2002-01-01T23:59:59.000Z

6

No Slide Title  

Science Conference Proceedings (OSTI)

... Complete Environ. (Fish, Daphnia, Algae) Chromosome aberration Initiate 4-week inhalation tox. ... (Fish, Daphnia, Algae) Initiate 4- & 13 wk inhal. ...

2011-11-16T23:59:59.000Z

7

Jim Leap: Farm Manager, Center for Agroecology and Sustainable Food Systems  

E-Print Network (OSTI)

they figure there’s x number of customers that are going tox number of years. I don’t want to jeopardize their customer

Rabkin, Sarah

2010-01-01T23:59:59.000Z

8

Main Parameters  

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

Lattice Definitions Up: APS Storage Ring Parameters Previous: APS Storage Ring Parameters Main Parameters Storage Ring Parameters Notation Model Value General Parameters Nominal...

9

shape parameters  

Science Conference Proceedings (OSTI)

... Shape Parameters or Form factors. Shape parameters or form factors are derived from more basic measurements such ...

10

NSLS Ring Parameters  

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

Ring Parameters VUV Ring Parameters X-Ray Ring Parameters Booster Ring Parameters Map of Experimental Floor (jpg)...

11

Storage Ring Parameters  

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

Photon Source Parameters Storage Ring Parameters Print General Parameters Parameter Value Beam particle electron Beam energy 1.9 GeV (1.0-1.9 GeV possible) Injection energy 1.9 GeV...

12

Impact Statement Tens of thousands of chemicals  

E-Print Network (OSTI)

are currently in commerce, and hundreds more are introduced every year. Because there are so many chemicals—and since traditional chemical toxicity tests using animals are expensive and time consuming—only a small fraction of chemicals have been fully assessed for potential risk. In 2007, EPA scientists began working on ToxCast, a research project that identifies and prioritizes potentially toxic chemicals using rapid, automated tests called highthroughput screening (HTS) assays. ToxCast is currently assessing over 2,000 chemicals from a broad range of sources, including pesticides, industrial and consumer products, food additives, and failed drugs that were never released to the market. Figure 1. The technologies included in ToxCast use non-animal tests called in vitro assays to help understand what might happen when a human is exposed to a chemical. However, it is difficult to determine the relevance of in vitro data when predicting toxicity from realworld exposures. This study focuses on discovering what level of human exposure is required to result in the internal concentrations that caused effects in in vitro tests. To provide insights into this question, this study made experimental measurements and calculated relevant human exposures for 239 of the 309 ToxCast Phase I chemicals. This study indicates that understanding relevant exposure conditions is important when using HTS in vitro data to prioritize chemicals for further testing and risk management.

unknown authors

2011-01-01T23:59:59.000Z

13

Evaluation of BOC'S Lotox Process for the Oxidation of Elemental Mercury in Flue Gas from a Coal-Fired Boiler  

SciTech Connect

Linde's Low Temperature Oxidation (LoTOx{trademark}) process has been demonstrated successfully to remove more than 90% of the NOx emitted from coal-fired boilers. Preliminary findings have shown that the LoTOx{trademark} process can be as effective for mercury emissions control as well. In the LoTOx{trademark} system, ozone is injected into a reaction duct, where NO and NO{sub 2} in the flue gas are selectively oxidized at relatively low temperatures and converted to higher nitrogen oxides, which are highly water soluble. Elemental mercury in the flue gas also reacts with ozone to form oxidized mercury, which unlike elemental mercury is water-soluble. Nitrogen oxides and oxidized mercury in the reaction duct and residual ozone, if any, are effectively removed in a wet scrubber. Thus, LoTOx{trademark} appears to be a viable technology for multi-pollutant emission control. To prove the feasibility of mercury oxidation with ozone in support of marketing LoTOx{trademark} for multi-pollutant emission control, Linde has performed a series of bench-scale tests with simulated flue gas streams. However, in order to enable Linde to evaluate the performance of the process with a flue gas stream that is more representative of a coal-fired boiler; one of Linde's bench-scale LoTOx{trademark} units was installed at WRI's combustion test facility (CTF), where a slipstream of flue gas from the CTF was treated. The degree of mercury and NOx oxidation taking place in the LoTOx{trademark} unit was quantified as a function of ozone injection rates, reactor temperatures, residence time, and ranks of coals. The overall conclusions from these tests are: (1) over 80% reduction in elemental mercury and over 90% reduction of NOx can be achieved with an O{sub 3}/NO{sub X} molar ratio of less than two, (2) in most of the cases, a lower reactor temperature is preferred over a higher temperature due to ozone dissociation, however, the combination of both low residence time and high temperature proved to be effective in the oxidation of both NOx and elemental mercury, and (3) higher residence time, lower temperature, and higher molar ratio of O{sub 3}/NOx contributed to the highest elemental mercury and NOx reductions.

Khalid Omar

2008-04-30T23:59:59.000Z

14

Extracting the fundamental parameters  

E-Print Network (OSTI)

If supersymmetry is discovered at the LHC, the extraction of the fundamental parameters will be a formidable task. In such a system where measurements depend on different combinations of the parameters in a highly correlated system, the identification of the true parameter set in an efficient way necessitates the development and use of sophisticated methods. A rigorous treatment of experimental and theoretical errors is necessary to determine the precision of the measurement of the fundamental parameters. The techniques developed for this endeavor can also be applied to similar problems such as the determination of the Higgs boson couplings at the LHC.

Dirk Zerwas

2009-09-30T23:59:59.000Z

15

Photon Source Parameters  

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

Photon Source Parameters Photon Source Parameters Photon Source Parameters Print Summary Graph of Brightness Curves for All Insertion Devices Insertion Device and Bend Magnet Parameters Bend Magnet Superbend Magnet U30 Undulator U50 Undulator U80 Undulator U100 Undulator W114 Wiggler The ALS has six elliptically polarizing undulators, two in straight 4, two in straight 11, and one each in straights 6 and 7. All are arranged with chicanes so that two such devices can be installed to feed two independent beamlines. They can be used in a variety of polarization modes, including circular, elliptical, horizontal, and vertical. These modes can be chosen by appropriate phasing of the magnet rows. The brightness and flux curves below are shown for horizontal and circular polarization. Curves for elliptical and vertical polarization are similar to the horizontal polarization curve, but the minimum photon energy is higher.

16

$?$ condensation and physical parameters  

E-Print Network (OSTI)

Recently we showed how a non-local Nambu-Jona-Lasinio model comes out from QCD in the low-energy limit. In this way, it is possible to fix all the free parameters of the model with physical ones. We use this approach to derive a local limit to the Nambu-Jona-Lasinio model with the parameters those obtained from QCD in order to fix the physical parameters of $\\rho$ condensation. $\\rho$ condensation is a consequence of the highly non-trivial behavior of the QCD vacuum in presence a very strong magnetic field giving rising to superconductive behavior in quark matter. Determination of the proper parameters for this state can be an important helpful guide to identify it experimentally.

Marco Frasca

2013-09-16T23:59:59.000Z

17

Parameters of Ceramicrete Binders  

Table 1. Parameters of Ceramicrete Binder . Property Range of values Remarks . Density of binders 1.7-2.0 g/cc May be enhanced or reduced by selecting ...

18

Process Parameters and Controls  

Science Conference Proceedings (OSTI)

Figure: ...Fig. 15 Effect of alloy and process parameters on the generation of residual-stress states. v , shot velocity; p , peening pressure; t , peening time; d , ball diameter; HV s , ball hardness; HV w , workpiece hardness. Source: Ref 11...

19

Reassessment of safeguards parameters  

Science Conference Proceedings (OSTI)

The International Atomic Energy Agency is reassessing the timeliness and goal quantity parameters that are used in defining safeguards approaches. This study reviews technology developments since the parameters were established in the 1970s and concludes that there is no reason to relax goal quantity or conversion time for reactor-grade plutonium relative to weapons-grade plutonium. For low-enriched uranium, especially in countries with advanced enrichment capability there may be an incentive to shorten the detection time.

Hakkila, E.A.; Richter, J.L.; Mullen, M.F.

1994-07-01T23:59:59.000Z

20

Photon Source Parameters  

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

Photon Source Parameters Print Photon Source Parameters Print Summary Graph of Brightness Curves for All Insertion Devices Insertion Device and Bend Magnet Parameters Bend Magnet Superbend Magnet U30 Undulator U50 Undulator U80 Undulator U100 Undulator W114 Wiggler The ALS has six elliptically polarizing undulators, two in straight 4, two in straight 11, and one each in straights 6 and 7. All are arranged with chicanes so that two such devices can be installed to feed two independent beamlines. They can be used in a variety of polarization modes, including circular, elliptical, horizontal, and vertical. These modes can be chosen by appropriate phasing of the magnet rows. The brightness and flux curves below are shown for horizontal and circular polarization. Curves for elliptical and vertical polarization are similar to the horizontal polarization curve, but the minimum photon energy is higher.

Note: This page contains sample records for the topic "tox parameter tox" 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

Photon Source Parameters  

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

Photon Source Parameters Print Photon Source Parameters Print Summary Graph of Brightness Curves for All Insertion Devices Insertion Device and Bend Magnet Parameters Bend Magnet Superbend Magnet U30 Undulator U50 Undulator U80 Undulator U100 Undulator W114 Wiggler The ALS has six elliptically polarizing undulators, two in straight 4, two in straight 11, and one each in straights 6 and 7. All are arranged with chicanes so that two such devices can be installed to feed two independent beamlines. They can be used in a variety of polarization modes, including circular, elliptical, horizontal, and vertical. These modes can be chosen by appropriate phasing of the magnet rows. The brightness and flux curves below are shown for horizontal and circular polarization. Curves for elliptical and vertical polarization are similar to the horizontal polarization curve, but the minimum photon energy is higher.

22

Photon Source Parameters  

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

Photon Source Parameters Print Photon Source Parameters Print Summary Graph of Brightness Curves for All Insertion Devices Insertion Device and Bend Magnet Parameters Bend Magnet Superbend Magnet U30 Undulator U50 Undulator U80 Undulator U100 Undulator W114 Wiggler The ALS has six elliptically polarizing undulators, two in straight 4, two in straight 11, and one each in straights 6 and 7. All are arranged with chicanes so that two such devices can be installed to feed two independent beamlines. They can be used in a variety of polarization modes, including circular, elliptical, horizontal, and vertical. These modes can be chosen by appropriate phasing of the magnet rows. The brightness and flux curves below are shown for horizontal and circular polarization. Curves for elliptical and vertical polarization are similar to the horizontal polarization curve, but the minimum photon energy is higher.

23

Photon Source Parameters  

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

Photon Source Parameters Print Photon Source Parameters Print Summary Graph of Brightness Curves for All Insertion Devices Insertion Device and Bend Magnet Parameters Bend Magnet Superbend Magnet U30 Undulator U50 Undulator U80 Undulator U100 Undulator W114 Wiggler The ALS has six elliptically polarizing undulators, two in straight 4, two in straight 11, and one each in straights 6 and 7. All are arranged with chicanes so that two such devices can be installed to feed two independent beamlines. They can be used in a variety of polarization modes, including circular, elliptical, horizontal, and vertical. These modes can be chosen by appropriate phasing of the magnet rows. The brightness and flux curves below are shown for horizontal and circular polarization. Curves for elliptical and vertical polarization are similar to the horizontal polarization curve, but the minimum photon energy is higher.

24

BNL | ATF Beamline Parameters  

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

Beamline Parameters Beamline Parameters Electron beam energy: 25 to 76 MeV Temporal structure: Macropulse length: 3 microseconds Macropulse repetition rate from under 1 PPS to 3 PPS. Micropulse repetition period 12.25 ns or 24.5 ns. Micropulse length variable from about 1 ps FWHM to 10 ps FWHM. Electron beam charge: continuously variable. Single micropulse charge from zero to a few nanoculombs. Bunch train charge up to about 10 nanoculombs. Emittance: depends on various conditions, e.g. peak current, gun field, microbunch length etc. At 1 nC we have measured the emittance at 2.6 mm mrad (rms normalized) at a bunch length of 10 ps FWHM. The local emittance (Slice Emittance) is smaller, measured 1.4 mm mrad for a slice out of the 1 nC bunch. Stability: (approx.) 1 ps in short term phase, 1% of beam diameter

25

ATLAS parameter study  

DOE Green Energy (OSTI)

The purpose of this study is to make an independent assessment on the parameters chosen for the ATLAS capacitor bank at LANL. The contractor will perform a study of the basic pulsed power parameters of the ATLAS device with baseline functional parameters of >25 MA implosion current and <2.5 microsecond current risetime. Nominal circuit parameters held fixed will be the 14 nH from the vacuum interface to the load, and the nominal load impedances of 1 milliohm for slow loads and 10 milliohms for fast loads. Single Ended designs, as opposed to bipolar designs, will be studied in detail. The ATLAS pulsed power design problem is about inductance. The reason that a 36 MJ bank is required is that such a bank has enough individual capacitors so that the parallel inductance is acceptably low. Since about half the inductance is in the bank, and the inductance and time constant of the submodules is fixed, the variation of output with a given parameter will generally be a weak one. In general, the dl/dt calculation demonstrates that for the real system inductances, 700 kV is the optimum voltage for the bank to drive X-ray loads. The optimum is broad, and there is little reduction in performance at voltages as low as 450 kV. The direct drive velocity analysis also shows that the optimum velocity is between 480 and 800 kV for a variety of assumptions, and that there is less than a 10% variation in velocity over this range. Voltages in the 120 kV--600 kV range are desirable for driving heavy liners. A compromise optimum operating point might be 480 kV, at which all X-ray operation scenarios are within 10% of their velocity optimum, and heavy liners can be configured to be near optimum if small enough. Based on very preliminary studies the author believes that the choice of a single operating voltage point (say, 480 kV) is unnecessary, and that a bank engineered for dual operation at 480 and 240 kV will be the best solution to the ATLAS problem.

Adler, R.J. [North Star Research Corp., Albuquerque, NM (United States)

1994-09-03T23:59:59.000Z

26

Constraints on cosmological parameters  

E-Print Network (OSTI)

A cosmological model with total density close to critical (and flat geometry), dominated by dark matter and dark energy of unknown nature, and consistent with the basic predictions of the inflationary scenario is a very good fit to a variety of cosmological probes: the anisotropy of the CMB, the large scale distribution of matter, the luminosity distance of high-redshift type Ia supernovae and so on. These high-quality data have established a new standard of precision in the determination of cosmological parameters. CMB and Physics of the Early universe

Amedeo Balbi; Amedeo Balbi

2006-01-01T23:59:59.000Z

27

Electrochromic Glazings: Animation Parameters  

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

Glazings Glazings Animation Simulation Parameters The Electrochromic Glazing Office Animation is created using an image compositing method whereby separate images of the office generated with only one source of illumination are added together in variable percentages to come up with the final image. This method assumes that the sources of illumination do not change position through the animation sequence. Although the sun does move approximately 5 degrees during the span of this 20 minute animation sequence, because this movement is not the focus of the simulation and does not significantly change the intensity of the solar exposure, it is ignored. This method takes advantage of the principal of the scalability of light to avoid the significant time involved in calculating separate Radiance renderings for each combination of sky condition (direct sun versus no direct sun) and electrochromic glazing transmission.

28

Hupmobile cloud chamber parameters  

SciTech Connect

The accompanying table lists the presently selected parameters for the twelve cloud chambers. The chambers are numbered consecutively from 4 through 15 as they are lined up in the bunker. The lowest number is closest to the source. All except the first chamber have some thin metal filters to attenuate the flux and harden the spectrum. Cloud chambers 10, 12, and 14 are shielded by a collimator with about 200 pinholes in it. The flux in these chambers is attenuated by the ratio of the pinhole area to total beam area which is a factor of 50. Various gases and gas pressures are used to obtain suitable track lengths and interaction cross sections. Neon, argon, and krypton are used to obtain photo electrons. Hydrogen is used to obtain Compton electrons.

Hansen, N. E.

1967-09-28T23:59:59.000Z

29

PUBLIC HEALTH STATEMENT MERCURY  

E-Print Network (OSTI)

This Public Health Statement is the summary chapter from the Toxicological Profile for Mercury. It is one in a series of Public Health Statements about hazardous substances and their health effects. A shorter version, the ToxFAQs™, is also available. This information is important because this substance may harm you. The effects of exposure to any hazardous substance depend on the dose, the duration, how you are exposed, personal traits and habits, and whether other chemicals are

unknown authors

1999-01-01T23:59:59.000Z

30

Amtsblatt der Europischen Union L 235/1 (Verffentlichungsbedrftige Rechtsakte, die in Anwendung des EG-Vertrags/Euratom-Vertrags erlassen wurden)  

E-Print Network (OSTI)

. Gas Ox. Gas 1 Acute Tox. 2 * Skin Corr. 1B H270 H330 H314 GHS04 GHS03 GHS06 GHS05 Dgr H270 H330 H314-SACremmuN-GEgnunhciezeBehcsimehcelanoitanretnI.rN-xednI #12;AmtsblattderEuropäischenUnionL235/5 009-001-00-0 fluorine 231-954-8 7782-41-4 Press. Gas Ox. Gas 1,5 % C Gas

Kersting, Roland

31

Nucleic Acid Standards - Refinement Parameters  

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

Refinement Parameters Refinement Parameters The DNA/RNA topology and parameter files for X-PLOR are shown below. These were tested with DNA structures and with protein-DNA complexes. X-PLOR topology file X-PLOR parameter files: X-PLOR parameter file For the refinement of high resolution structures (< 1.7 Angstroms) the parameter file with distinct bond distances and bond angles for both C2'-endo and C3'-endo conformations should be considered: X-PLOR parameter file for high resolution structures "New Parameters for the Refinement of Nucleic Acid Containing Structures." Gary Parkinson, Jaroslav Vojtechovsky, Lester Clowney, Axel Brunger*, and Helen M. Berman. (1996) Acta Cryst. D 52, 57-64 Rutgers University, Department of Chemistry, Piscataway, NJ 08855-0939; *The Howard Hughes Medical Institute and Departments of Molecular and

32

Subsurface Geotechnical Parameters Report  

Science Conference Proceedings (OSTI)

The Yucca Mountain Project is entering a the license application (LA) stage in its mission to develop the nation's first underground nuclear waste repository. After a number of years of gathering data related to site characterization, including activities ranging from laboratory and site investigations, to numerical modeling of processes associated with conditions to be encountered in the future repository, the Project is realigning its activities towards the License Application preparation. At the current stage, the major efforts are directed at translating the results of scientific investigations into sets of data needed to support the design, and to fulfill the licensing requirements and the repository design activities. This document addresses the program need to address specific technical questions so that an assessment can be made about the suitability and adequacy of data to license and construct a repository at the Yucca Mountain Site. In July 2002, the U.S. Nuclear Regulatory Commission (NRC) published an Integrated Issue Resolution Status Report (NRC 2002). Included in this report were the Repository Design and Thermal-Mechanical Effects (RDTME) Key Technical Issues (KTI). Geotechnical agreements were formulated to resolve a number of KTI subissues, in particular, RDTME KTIs 3.04, 3.05, 3.07, and 3.19 relate to the physical, thermal and mechanical properties of the host rock (NRC 2002, pp. 2.1.1-28, 2.1.7-10 to 2.1.7-21, A-17, A-18, and A-20). The purpose of the Subsurface Geotechnical Parameters Report is to present an accounting of current geotechnical information that will help resolve KTI subissues and some other project needs. The report analyzes and summarizes available qualified geotechnical data. It evaluates the sufficiency and quality of existing data to support engineering design and performance assessment. In addition, the corroborative data obtained from tests performed by a number of research organizations is presented to reinforce conclusions derived from the pool of data gathered within a full QA-controlled domain. An evaluation of the completeness of the current data is provided with respect to the requirements for geotechnical data to support design and performance assessment.

D. Rigby; M. Mrugala; G. Shideler; T. Davidsavor; J. Leem; D. Buesch; Y. Sun; D. Potyondy; M. Christianson

2003-12-17T23:59:59.000Z

33

Multi-parameter bidding method: development of parameters  

E-Print Network (OSTI)

This thesis presents the results of an investigation of multi-parameter bidding for application in the highway construction industry. The major objective of this research is to further develop the multi-parameter bidding method as currently practiced by State Highway Agencies (SHA). The goal is to make this type of bidding more effective in terms of cost, schedule, quality, safety, and other project objectives. The major tasks involved in @s investigation were: 1) determining state-of-the-art through literature review; 2) surveying the highway construction industry for current practices; 3) synthesizing literature and survey results to propose new parameters and innovative use of currently used parameters; 4) evaluating these parameters; and 5) proposing an outline for an integrated approach to multi-parameter bidding. The parameters were evaluated in terms of a number of major criteria: 1) compatibility to low-bid system; 2) impact on SHA resources; 3) impact on product quality; 4) nature, magnitude, and allocation of risks, and 5) administrative and legal elements. The integrated approach to multi-parameter bidding explores the relationship between various other processes and the process for selecting multi-parameter bidding strategy within the project develop ment framework. Preliminary implementation guidelines are provided as part of this integrated approach.

Rahman, Suhel Parvez

1998-01-01T23:59:59.000Z

34

Multiobjectivization for classifier parameter tuning  

Science Conference Proceedings (OSTI)

We present a multiobjectivization approach to the parameter tuning of RBF networks and multilayer perceptrons. The approach works by adding two new objectives -- maximization of kappa statistic and minimization of root mean square error -- to the originally ... Keywords: classification, evolutionary algorithm, machine learning, multiobjective optimization, multiobjectivization, parameter tuning

Martin Pilat; Roman Neruda

2013-07-01T23:59:59.000Z

35

Median statistics cosmological parameter values  

E-Print Network (OSTI)

We present median statistics central values and ranges for 12 cosmological parameters, using 582 measurements (published during 1990-2010) collected by Croft & Dailey (2011). On comparing to the recent Planck collaboration Ade et al. 2013 estimates of 11 of these parameters, we find good consistency in nine cases.

Crandall, Sara

2013-01-01T23:59:59.000Z

36

Parameters  

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

difference between a loop in a structural template and its aligned (loop) region in the query sequence. The open gap penalty is 10.8 and each elongation penalty is 0.6 by default....

37

Initial Tests Of The Dual-Sweep Streak Camera System Planned For Aps Particle-Beam Diagnostics*  

E-Print Network (OSTI)

Initial tests of a dual-sweep streak system planned for use on the Advanced Photon Source (APS) have been performed using assets of the Argonne Wakefield Accelerator (AWA) facility. The short light pulses from the photoelectric injector drive laser in both the visible (l=496 nm, Dt~1.5 ps (FWHM)), and the ultraviolet (l= 248 nm, Dt~5 ps (FWHM)) were used. Both a UV-visible S20 photocathode streak tube and a UV-tox -ray Au photocathode streak tube were tested. Calibration data with an etalon were also obtained. A sample of dualsweep streak data using optical synchrotron radiation on the APS injector synchrotron is also presented. I. INTRODUCTION The Advanced Photon Source will be a third-generation synchrotron radiation facility for the hard x-ray (10-100 keV) research community. The need to measure and monitor particle and photon beam parameters in the single bunch (10 ps), bunch-to-bunch (3 to 180 ns), and turn-by-turn (3.68 s) timescales has resulted in the choice of a dual-sweep s...

Lumpkin Yang And; A. Lumpkin; B. Yang; W. Gai; W. Cieslik

1995-01-01T23:59:59.000Z

38

Cross-study and cross-omics comparisons of three nephrotoxic compounds reveal mechanistic insights and new candidate biomarkers  

Science Conference Proceedings (OSTI)

The European InnoMed-PredTox project was a collaborative effort between 15 pharmaceutical companies, 2 small and mid-sized enterprises, and 3 universities with the goal of delivering deeper insights into the molecular mechanisms of kidney and liver toxicity and to identify mechanism-linked diagnostic or prognostic safety biomarker candidates by combining conventional toxicological parameters with 'omics' data. Mechanistic toxicity studies with 16 different compounds, 2 dose levels, and 3 time points were performed in male Crl: WI(Han) rats. Three of the 16 investigated compounds, BI-3 (FP007SE), Gentamicin (FP009SF), and IMM125 (FP013NO), induced kidney proximal tubule damage (PTD). In addition to histopathology and clinical chemistry, transcriptomics microarray and proteomics 2D-DIGE analysis were performed. Data from the three PTD studies were combined for a cross-study and cross-omics meta-analysis of the target organ. The mechanistic interpretation of kidney PTD-associated deregulated transcripts revealed, in addition to previously described kidney damage transcript biomarkers such as KIM-1, CLU and TIMP-1, a number of additional deregulated pathways congruent with histopathology observations on a single animal basis, including a specific effect on the complement system. The identification of new, more specific biomarker candidates for PTD was most successful when transcriptomics data were used. Combining transcriptomics data with proteomics data added extra value.

Matheis, Katja A., E-mail: katja.matheis@boehringer-ingelheim.com [Boehringer Ingelheim Pharma GmbH and Co. KG, Biberach an der Riss (Germany); Com, Emmanuelle [Sanofi-Aventis, Paris (France); High-Throughput Proteomics Core Facility OUEST-genopole (registered) , Rennes (France); Gautier, Jean-Charles [Sanofi-Aventis, Paris (France); Guerreiro, Nelson [Novartis Institutes for BioMedical Research (NIBR), Basel (Switzerland); Brandenburg, Arnd; Gmuender, Hans [GeneData AG, Basel (Switzerland); Sposny, Alexandra; Hewitt, Philip [Merck KGaA, Darmstadt (Germany); Amberg, Alexander [Sanofi-Aventis, Frankfurt (Germany); Boernsen, Olaf [Novartis Institutes for BioMedical Research (NIBR), Basel (Switzerland); Riefke, Bjoern [Bayer Schering Pharma AG, Berlin (Germany); Hoffmann, Dana; Mally, Angela [Department of Toxicology, University of Wuerzburg, Wuerzburg (Germany); Kalkuhl, Arno [Boehringer Ingelheim Pharma GmbH and Co. KG, Biberach an der Riss (Germany); Suter, Laura [F. Hoffmann-La Roche, Ltd., Basel (Switzerland); Dieterle, Frank; Staedtler, Frank [Novartis Institutes for BioMedical Research (NIBR), Basel (Switzerland)

2011-04-15T23:59:59.000Z

39

Cranking mass parameters for fission  

E-Print Network (OSTI)

A formalism for semi-adiabatic cranking mass parameters is presented. For the fission process of 234U, the time-dependent pairing equations of motion were used to calculate the excitation energy and to extract values of the cranking inertia. A fission barrier is determined by minimizing the action trajectory in a five dimensional configuration space spanned by elongation, necking, deformations of fragments and mass-asymmetry. The deformation energy is computed in the the frame of the microscopic-macroscopic model. The two center shell model with Woods-Saxon potentials is used in this context. Values of the inertia for excited fissioning systems are reported. A dependence between the cranking mass parameters and the intrinsic excitation energy is evidenced.

M. Mirea; R. C. Bobulescu

2009-09-11T23:59:59.000Z

40

ORNL DAAC, Biogeochemical Parameters for Ecosystem Modeling,...  

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

Parameters for Ecosystem Modeling The ORNL DAAC announces the release of a data set entitled "Literature-Derived Parameters for the BIOME-BGC Terrestrial Ecosystem...

Note: This page contains sample records for the topic "tox parameter tox" 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

Measuring neutrino oscillation parameters using $\  

SciTech Connect

MINOS is a long-baseline neutrino oscillation experiment. It consists of two large steel-scintillator tracking calorimeters. The near detector is situated at Fermilab, close to the production point of the NuMI muon-neutrino beam. The far detector is 735 km away, 716m underground in the Soudan mine, Northern Minnesota. The primary purpose of the MINOS experiment is to make precise measurements of the 'atmospheric' neutrino oscillation parameters ({Delta}m{sub atm}{sup 2} and sin{sup 2} 2{theta}{sub atm}). The oscillation signal consists of an energy-dependent deficit of {nu}{sub {mu}} interactions in the far detector. The near detector is used to characterize the properties of the beam before oscillations develop. The two-detector design allows many potential sources of systematic error in the far detector to be mitigated by the near detector observations. This thesis describes the details of the {nu}{sub {mu}}-disappearance analysis, and presents a new technique to estimate the hadronic energy of neutrino interactions. This estimator achieves a significant improvement in the energy resolution of the neutrino spectrum, and in the sensitivity of the neutrino oscillation fit. The systematic uncertainty on the hadronic energy scale was re-evaluated and found to be comparable to that of the energy estimator previously in use. The best-fit oscillation parameters of the {nu}{sub {mu}}-disappearance analysis, incorporating this new estimator were: {Delta}m{sup 2} = 2.32{sub -0.08}{sup +0.12} x 10{sup -3} eV{sup 2}, sin {sup 2} 2{theta} > 0.90 (90% C.L.). A similar analysis, using data from a period of running where the NuMI beam was operated in a configuration producing a predominantly {bar {nu}}{sub {mu}} beam, yielded somewhat different best-fit parameters {Delta}{bar m}{sup 2} = (3.36{sub -0.40}{sup +0.46}(stat.) {+-} 0.06(syst.)) x 10{sup -3}eV{sup 2}, sin{sup 2} 2{bar {theta}} = 0.86{sub -0.12}{sup _0.11}(stat.) {+-} 0.01(syst.). The tension between these results is intriguing, and additional antineutrino data is currently being taken in order to further investigate this apparent discrepancy.

Backhouse, Christopher James; /Oxford U.

2011-02-01T23:59:59.000Z

42

Proposed ILC Parameters T.O. Raubenheimer  

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

-05-98 -05-98 Proposed ILC Parameters T.O. Raubenheimer and K. Yokoya Introduction In this note, we describe the proposed working parameter set for the KEK-SLAC ILC linear collider and discuss the reasons leading to the values listed; more ex- tensive discussion of the optimization process will be found in subsequent notes. The parameter set is listed in Table 1 and is compared with the JLC 3-97 parameters and the NLC ZDR parameters in Table 2. The new parameter set has an operating plane which ranges from low IP emittances and high luminosity (cases A) to large IP emittances and smaller luminosity (cases C). Over this range, the bunch charge, bunch length, and IP beta functions are varied, however, the parameters have been chosen so that the tolerances on the accelerating structures are roughly constant. The collider must be designed to operate over the entire parameter range. In all cases,

43

Hail Parameter Relations: A Comprehensive Digest  

Science Conference Proceedings (OSTI)

Diagrams are presented which display the relationships between hailstone size distribution parameters and integral quantities defined in terms of these parameters. It is assumed that the hailstones are spherical and homogeneous, are distributed ...

Carlton W. Ulbrich; David Atlas

1982-01-01T23:59:59.000Z

44

Dynamic Measurement of Hydraulic Parameters Under Liquid ...  

Search PNNL. PNNL Home; About; Research; Publications; Jobs; News; Contacts; Dynamic Measurement of Hydraulic Parameters Under Liquid Unsaturated Flow ...

45

Free Parameters and Frameworks in Minimal Supersymmetry  

E-Print Network (OSTI)

405 Appendix A Free Parameters and Frameworks in Minimal Supersymmetry It is useful to discuss what the various schemes that exist for reducing the set of free parameters to a manageable number. The information, and so is fixed by experiment. The free parameters consist mainly of the coefficients of the "soft

46

Free Parameters and Frameworks in Minimal Supersymmetry  

E-Print Network (OSTI)

405 Appendix A Free Parameters and Frameworks in Minimal Supersymmetry It is useful to discuss what the various schemes that exist for reducing the set of free parameters to a manageable number. The information, and so is fixed by experiment. The free parameters consist mainly of the coe#cients of the ``soft

47

Automated Tuning of Optimization Software Parameters  

E-Print Network (OSTI)

ACM Press, Washington DC, USA, 1085–1086. Kohavi, Ron, George John. 1995. Automatic parameter selection by minimizing estimated error. Armand.

48

ISG8-Parameters, Design, Instrumentation and Tuning  

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

Parameters, Design, Instrumentation and Tuning (WG1) Bldg.212 Cascades Conference Rm. K. Kubo, T. Raubenheimer, P. Tenenbaum, K. Yokoya Parallel Sessions: Working Groups: WG1:...

49

The conservation of mass-moment parameters  

E-Print Network (OSTI)

In this paper we study a concept of mass-moment parameter which is the generalization of the mass and the moments of inertia of a continuous media. We shall present some interesting kinematical results in the hypothesis that a set of mass-moment parameters are conserved in a motion of a continuous media.

Dan Comanescu

2007-02-16T23:59:59.000Z

50

Cosmological parameter estimation from CMB experiments  

Science Conference Proceedings (OSTI)

I review the general aspects of cosmological parameter estimation from observations of the cosmic microwave background (CMB) temperature anisotropies in the framework of inflationary adiabatic models. The most recent CMB datasets are starting to give good constraints on the relevant parameters of inflationary adiabatic models. They point toward a model consistent with the basic predictions of inflation: a nearly flat universe

Amedeo Balbi

2001-01-01T23:59:59.000Z

51

NREL: PVWatts - How to Change Parameters  

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

Change Parameters Change Parameters The PVWattsTM calculator allows users to substitute its default input parameters with custom values. Learn how to change the PVWatts parameters for: DC rating DC-to-AC derate factor Array type Tilt angle Azimuth angle Electricity cost DC Rating The size of a photovoltaic (PV) system is its nameplate DC power rating. This is determined by adding the PV module power listed on the nameplates of the PV modules in watts and then dividing the sum by 1,000 to convert it to kilowatts (kW). PV module power ratings are for standard test conditions (STC) of 1,000 W/m2 solar irradiance and 25°C PV module temperature. The default PV system size is 4 kW. This corresponds to a PV array area of approximately 35 m2 (377 ft2). Caution: For correct results, the DC rating input must be the nameplate DC

52

On concepts of performance parameters for channels  

Science Conference Proceedings (OSTI)

Among the mostly investigated parameters for noisy channels are code size, error probability in decoding, block length; rate, capacity, reliability function; delay, complexity of coding. There are several statements about connections between these quantities. ...

R. Ahlswede

2006-01-01T23:59:59.000Z

53

Vertical Axis Wind Turbine Foundation parameter study  

DOE Green Energy (OSTI)

The dynamic failure criterion governing the dimensions of prototype Vertical Axis Wind Turbine Foundations is treated as a variable parameter. The resulting change in foundation dimensions and costs is examined.

Lodde, P.F.

1980-07-01T23:59:59.000Z

54

Integral data analysis for resonance parameters determination  

SciTech Connect

Neutron time-of-flight experiments have long been used to determine resonance parameters. Those resonance parameters have then been used in calculations of integral quantities such as Maxwellian averages or resonance integrals, and results of those calculations in turn have been used as a criterion for acceptability of the resonance analysis. However, the calculations were inadequate because covariances on the parameter values were not included in the calculations. In this report an effort to correct for that deficiency is documented: (1) the R-matrix analysis code SAMMY has been modified to include integral quantities of importance, (2) directly within the resonance parameter analysis, and (3) to determine the best fit to both differential (microscopic) and integral (macroscopic) data simultaneously. This modification was implemented because it is expected to have an impact on the intermediate-energy range that is important for criticality safety applications.

Larson, N.M.; Leal, L.C.; Derrien, H.

1997-09-01T23:59:59.000Z

55

LCLS CDR Appendix A - Parameter Tables  

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

Performance A.1.1.1 Electron Beam Parameter Name Low Energy High Energy All Energies Unit Electron energy 4.54 14.35 GeV Electron Lorentz factor 8880 28082 Normalized slice...

56

Fixed-Parameter tractability, a prehistory,  

Science Conference Proceedings (OSTI)

Many of the foundational parameterized tenets discussed in this festschrift actually predate by over a decade the first systematic treatments of fixed-parameter tractability. In this frank, firsthand account I will, to the best of my recollection, describe ...

Michael A. Langston

2012-01-01T23:59:59.000Z

57

Technisch-economische parameters van duurzame  

E-Print Network (OSTI)

-economische berekeningsaannames 21 5.1 Windenergie 21 5.1.1 Wind onshore 21 5.1.2 Wind offshore 22 5.2 Biomassa: grootschalige/kWhe] Subsidieduur 2008-2009 [jaar] Windenergie · Onshore wind 7,1 15 · Offshore wind, 20 km 10,7 15 · Offshore wind-economische parameters wind onshore 22 Tabel 5.2 Technisch-economische parameters wind offshore 23 Tabel 5.3 Technisch

58

The enhanced value of combining conventional and 'omics' analyses in early assessment of drug-induced hepatobiliary injury  

SciTech Connect

The InnoMed PredTox consortium was formed to evaluate whether conventional preclinical safety assessment can be significantly enhanced by incorporation of molecular profiling ('omics') technologies. In short-term toxicological studies in rats, transcriptomics, proteomics and metabolomics data were collected and analyzed in relation to routine clinical chemistry and histopathology. Four of the sixteen hepato- and/or nephrotoxicants given to rats for 1, 3, or 14 days at two dose levels induced similar histopathological effects. These were characterized by bile duct necrosis and hyperplasia and/or increased bilirubin and cholestasis, in addition to hepatocyte necrosis and regeneration, hepatocyte hypertrophy, and hepatic inflammation. Combined analysis of liver transcriptomics data from these studies revealed common gene expression changes which allowed the development of a potential sequence of events on a mechanistic level in accordance with classical endpoint observations. This included genes implicated in early stress responses, regenerative processes, inflammation with inflammatory cell immigration, fibrotic processes, and cholestasis encompassing deregulation of certain membrane transporters. Furthermore, a preliminary classification analysis using transcriptomics data suggested that prediction of cholestasis may be possible based on gene expression changes seen at earlier time-points. Targeted bile acid analysis, based on LC-MS metabonomics data demonstrating increased levels of conjugated or unconjugated bile acids in response to individual compounds, did not provide earlier detection of toxicity as compared to conventional parameters, but may allow distinction of different types of hepatobiliary toxicity. Overall, liver transcriptomics data delivered mechanistic and molecular details in addition to the classical endpoint observations which were further enhanced by targeted bile acid analysis using LC/MS metabonomics.

Ellinger-Ziegelbauer, Heidrun, E-mail: heidrun.ellinger-ziegelbauer@bayerhealthcare.com [Bayer Schering Pharma AG, Wuppertal (Germany); Adler, Melanie [University of Wuerzburg, Wuerzburg (Germany); Amberg, Alexander [Sanofi aventis R and D, Disposition, Safety and Animal Research, Frankfurt (Germany); Brandenburg, Arnd [Genedata AG, Basel (Switzerland); Callanan, John J. [UCD School of Biomolecular and Biomedical Science and School of Agriculture, Food Science and Veterinary Medicine, UCD Conway Institute, University College Dublin, Dublin (Ireland); Connor, Susan [MetaPro (United Kingdom); Fountoulakis, Michael [Hoffmann-La Roche AG, Basel (Switzerland); Gmuender, Hans [Genedata AG, Basel (Switzerland); Gruhler, Albrecht [Novo Nordisk A/S, Maaloev (Denmark); Hewitt, Philip [Merck KGaA Darmstadt (Germany); Hodson, Mark [MetaPro (United Kingdom); Matheis, Katja A. [Boehringer Ingelheim Pharma GmbH and Co. KG, Biberach (Germany); McCarthy, Diane [Bio-Rad, Laboratories, Hercules, CA (United States); Raschke, Marian; Riefke, Bjoern [Bayer Schering Pharma AG, Berlin (Germany); Schmitt, Christina S. [Merck KGaA Darmstadt (Germany); Sieber, Max [University of Wuerzburg, Wuerzburg (Germany); Sposny, Alexandra [Merck KGaA Darmstadt (Germany); Suter, Laura [Hoffmann-La Roche AG, Basel (Switzerland); Sweatman, Brian [MetaPro (United Kingdom)

2011-04-15T23:59:59.000Z

59

STRUCTURAL PARAMETERS OF GALAXIES IN CANDELS  

Science Conference Proceedings (OSTI)

We present global structural parameter measurements of 109,533 unique, H{sub F160W}-selected objects from the CANDELS multi-cycle treasury program. Sersic model fits for these objects are produced with GALFIT in all available near-infrared filters (H{sub F160W}, J{sub F125W} and, for a subset, Y{sub F105W}). The parameters of the best-fitting Sersic models (total magnitude, half-light radius, Sersic index, axis ratio, and position angle) are made public, along with newly constructed point-spread functions for each field and filter. Random uncertainties in the measured parameters are estimated for each individual object based on a comparison between multiple, independent measurements of the same set of objects. To quantify systematic uncertainties, we create a mosaic with simulated galaxy images with a realistic distribution of input parameters and then process and analyze the mosaic in an identical manner as the real data. We find that accurate and precise measurements-to 10% or better-of all structural parameters can typically be obtained for galaxies with H{sub F160W} < 23, with comparable fidelity for basic size and shape measurements for galaxies to H{sub F160W} {approx} 24.5.

Van der Wel, A.; Chang, Yu-Yen; Rix, H.-W. [Max-Planck Institut fuer Astronomie, Koenigstuhl 17, D-69117 Heidelberg (Germany); Bell, E. F. [Department of Astronomy, University of Michigan, 500 Church Street, Ann Arbor, MI 48109 (United States); Haeussler, B.; Hartley, W. [Schools of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD (United Kingdom); McGrath, E. J.; Cheung, E.; Faber, S. M.; Kocevski, D. D.; Mozena, M. [UCO/Lick Observatory, Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States); Guo Yicheng [Astronomy Department, University of Massachusetts, 710 North Pleasant Street, Amherst, MA 01003 (United States); McIntosh, D. H. [Department of Physics and Astronomy, University of Missouri-Kansas City, 5110 Rockhill Road, Kansas City, MO 64110 (United States); Barden, M. [Institute of Astro- and Particle Physics, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck (Austria); Ferguson, H. C.; Grogin, N. A.; Koekemoer, A. M.; Lotz, J. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Galametz, A. [INAF-Osservatorio di Roma, Via Frascati 33, I-00040 Monteporzio (Italy); Kartaltepe, J. S., E-mail: vdwel@mpia.de [National Optical Astronomy Observatory, 950 North Cherry Avenue, Tucson, AZ 85719 (United States); and others

2012-12-15T23:59:59.000Z

60

Merging Models and Biomonitoring Data to Characterize Sources andPathways of Human Exposure to Organophosphorous Pesticides in the SalinasValley of California  

SciTech Connect

By drawing on human biomonitoring data and limited environmental samples together with outputs from the CalTOX multimedia, multipathway source-to-dose model, we characterize cumulative intake of organophosphorous (OP) pesticides in an agricultural region of California. We assemble regional OP pesticide use, environmental sampling, and biological tissue monitoring data for a large and geographically dispersed population cohort of 592 pregnant Latina women in California (the CHAMACOS cohort). We then use CalTOX with regional pesticide usage data to estimate the magnitude and uncertainty of exposure and intake from local sources. We combine model estimates of intake from local sources with food intake based on national residue data to estimate for the CHAMACOS cohort cumulative median OP intake, which corresponds to expected levels of urinary dialkylphosphate (DAP) metabolite excretion for this cohort. From these results we develop premises about relative contributions from different sources and pathways of exposure. We evaluate these premises by comparing the magnitude and variation of DAPs in the CHAMACOS cohort with the whole U.S. population using data from the National Health and Nutrition Evaluation Survey (NHANES). This comparison supports the premise that in both populations diet is the common and dominant exposure pathway. Both the model results and biomarker comparison supports the observation that the CHAMACOS population has a statistically significant higher intake of OP pesticides that appears as an almost constant additional dose among all participants. We attribute the magnitude and small variance of this intake to non-dietary exposure in residences from local sources.

McKone, Thomas E.; Castorina, Rosemary; Kuwabara, Yu; Harnly,Martha E.; Eskenazi, Brenda; Bradman, Asa

2006-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "tox parameter tox" 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

Optimized Parameters for a Mercury Jet Target  

Science Conference Proceedings (OSTI)

A study of target parameters for a high-power, liquid mercury jet target system for a neutrino factory or muon collider is presented. Using the MARS code, we simulate particle production initiated by incoming protons with kinetic energies between 2 and 100 GeV. For each proton beam energy, we maximize production by varying the geometric parameters of the target: the mercury jet radius, the incoming proton beam angle, and the crossing angle between the mercury jet and the proton beam. The number of muons surviving through an ionization cooling channel is determined as a function of the proton beam energy. We optimize the mercury jet target parameters: the mercury jet radius, the incoming proton beam angle and the crossing angle between the mercury jet and the proton beam for each proton beam energy. The optimized target radius varies from about 0.4 cm to 0.6 cm as the proton beam energy increases. The optimized beam angle varies from 75 mrad to 120 mrad. The optimized crossing angle is near 20 mrad for energies above 5 GeV. These values differ from earlier choices of 67 mrad for the beam angle and 33 mrad for the crossing angle. These new choices for the beam parameters increase the meson production by about 20% compared to the earlier parameters. Our study demonstrates that the maximum meson production efficiency per unit proton beam power occurs when the proton kinetic energy is in the range of 5-15 GeV. Finally, the dependence on energy of the number of muons at the end of the cooling channel is nearly identical to the dependence on energy of the meson production 50 m from the target. This demonstrates that the target parameters can be optimized without the additional step of running the distribution through a code such as ICOOL that simulates the bunching, phase rotation, and cooling.

Ding, X.; Kirk, H.

2010-12-01T23:59:59.000Z

62

A SINGLE-PARAMETER ADAPTIVE COMB FILTER  

E-Print Network (OSTI)

The study is concerned with a single-parameter adaptive comb filter (ACF), a multi-notch filter with periodically located nulls. The filter is suggested to retrieve a waveform modeled by superposition of harmonics, in particular, periodic non-sinusoidal signal. Using trigonometric constraints between the signal fundamental frequency and over tones results in a non-linear estimation problem. In the present study, the parameter adjustment relies on the extended Kalman filter scheme. Particularly, the 2, 3 and 4 notch ACF are derived and tested under different conditions. Given a multi-tone scenario, the ACF significantly outperforms common adaptive multi-notch filter.

Single-Parameter Adaptive Comb; Naum G. Chernoguz

2001-01-01T23:59:59.000Z

63

Uncertainty evaluation of delayed neutron decay parameters  

E-Print Network (OSTI)

In a nuclear reactor, delayed neutrons play a critical role in sustaining a controllable chain reaction. Delayed neutron’s relative yields and decay constants are very important for modeling reactivity control and have been studied for decades. Researchers have tried different experimental and numerical methods to assess these delayed neutron parameters. The reported parameter values vary widely, much more than the small statistical errors reported with these parameters. Interestingly, the reported parameters fit their individual measurement data well in spite of these differences. This dissertation focuses on evaluation of the errors and methods of delayed neutron relative yields and decay constants for thermal fission of U-235. Various numerical methods used to extract the delayed neutron parameter from the measured data, including Matrix Inverse, Levenberg-Marquardt, and Quasi-Newton methods, were studied extensively using simulated delayed neutron data. This simulated data was Poisson distributed around Keepin’s theoretical data. The extraction methods produced totally different results for the same data set, and some of the above numerical methods could not even find solutions for some data sets. Further investigation found that ill-conditioned matrices in the objective function were the reason for the inconsistent results. To find a reasonable solution with small variation, a regularization parameter was introduced using a numerical method called Ridge Regression. The results from the Ridge Regression method, in terms of goodness of fit to the data, were good and often better than the other methods. Due to the introduction of a regularization number in the algorithm, the fitted result contains a small additional bias, but this method can guarantee convergence no matter how large the coefficient matrix condition number. Both saturation and pulse modes were simulated to focus on different groups. Some of the factors that affect the solution stability were investigated including initial count rate, sample flight time, initial guess values. Finally, because comparing reported delayed neutron parameters among different experiments is useless to determine if their data actually differs, methods are proposed that can be used to compare the delayed neutron data sets.

Wang, Jinkai

2008-12-01T23:59:59.000Z

64

HFIR Technical Parameters | ORNL Neutron Sciences  

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

Reactor Technical Parameters Reactor Technical Parameters Overview HFIR Pool Layout HFIR pool layout. HFIR is a beryllium-reflected, light-water-cooled and -moderated, flux-trap type reactor that uses highly enriched uranium-235 as the fuel. The image on the right is a cutaway of the reactor which shows the pressure vessel, its location in the reactor pool, and some of the experiment facilities. The preliminary conceptual design of the reactor was based on the "flux trap" principle, in which the reactor core consists of four annular regions of fuel surrounding an unfueled moderating region or "island" (see cross section view). Such a configuration permits fast neutrons leaking from the fuel to be moderated in the island and thus produces a region of very high thermal-neutron flux at the center of the island. This reservoir of

65

Unified Graphical Summary of Neutrino Mixing Parameters  

E-Print Network (OSTI)

The neutrino mixing parameters are presented in a number of different ways by the various experiments, e.g. SuperKamiokande, K2K, SNO, KamLAND and Chooz and also by the Particle Data Group. In this paper, we argue that presenting the data in terms of $\\sin^2 \\theta$, where $\\theta$ is the mixing angle appropriate for a given experiment has a direct physical interpretation. For current atmospheric, solar and reactor neutrino experiments, the $\\sin^2 \\theta$'s are effectively the probability of finding a given flavor in a particular neutrino mass eigenstate. The given flavor and particular mass eigenstate varies from experiment to experiment, however, the use of $\\sin^2 \\theta$ provides a unified picture of all the data. Using this unified picture we present a graphical way to represent these neutrino mixing parameters which includes the uncertainties. All of this is performed in the context of the present experimental status of three neutrino oscillations.

Olga Mena; Stephen Parke

2003-12-10T23:59:59.000Z

66

Surveillance of industrial processes with correlated parameters  

DOE Patents (OSTI)

A system and method for surveillance of an industrial process are disclosed. The system and method includes a plurality of sensors monitoring industrial process parameters, devices to convert the sensed data to computer compatible information and a computer which executes computer software directed to analyzing the sensor data to discern statistically reliable alarm conditions. The computer software is executed to remove serial correlation information and then calculate Mahalanobis distribution data to carry out a probability ratio test to determine alarm conditions. 10 figs.

White, A.M.; Gross, K.C.; Kubic, W.L.; Wigeland, R.A.

1996-12-17T23:59:59.000Z

67

Surveillance of industrial processes with correlated parameters  

DOE Patents (OSTI)

A system and method for surveillance of an industrial process. The system and method includes a plurality of sensors monitoring industrial process parameters, devices to convert the sensed data to computer compatible information and a computer which executes computer software directed to analyzing the sensor data to discern statistically reliable alarm conditions. The computer software is executed to remove serial correlation information and then calculate Mahalanobis distribution data to carry out a probability ratio test to determine alarm conditions.

White, Andrew M. (Skokie, IL); Gross, Kenny C. (Bolingbrook, IL); Kubic, William L. (Sante Fe, NM); Wigeland, Roald A. (Olympia Fields, IL)

1996-01-01T23:59:59.000Z

68

Planck 2013 results. XVI. Cosmological parameters  

E-Print Network (OSTI)

We present the first results based on Planck measurements of the CMB temperature and lensing-potential power spectra. The Planck spectra at high multipoles are extremely well described by the standard spatially-flat six-parameter LCDM cosmology. In this model Planck data determine the cosmological parameters to high precision. We find a low value of the Hubble constant, H0=67.3+/-1.2 km/s/Mpc and a high value of the matter density parameter, Omega_m=0.315+/-0.017 (+/-1 sigma errors) in excellent agreement with constraints from baryon acoustic oscillation (BAO) surveys. Including curvature, we find that the Universe is consistent with spatial flatness to percent-level precision using Planck CMB data alone. We present results from an analysis of extensions to the standard cosmology, using astrophysical data sets in addition to Planck and high-resolution CMB data. None of these models are favoured significantly over standard LCDM. The deviation of the scalar spectral index from unity is insensitive to the additi...

Ade, P A R; Armitage-Caplan, C; Arnaud, M; Ashdown, M; Atrio-Barandela, F; Aumont, J; Baccigalupi, C; Banday, A J; Barreiro, R B; Bartlett, J G; Battaner, E; Benabed, K; Benoît, A; Benoit-Lévy, A; Bernard, J -P; Bersanelli, M; Bielewicz, P; Bobin, J; Bock, J J; Bonaldi, A; Bond, J R; Borrill, J; Bouchet, F R; Bridges, M; Bucher, M; Burigana, C; Butler, R C; Calabrese, E; Cappellini, B; Cardoso, J -F; Catalano, A; Challinor, A; Chamballu, A; Chary, R -R; Chen, X; Chiang, L -Y; Chiang, H C; Christensen, P R; Church, S; Clements, D L; Colombi, S; Colombo, L P L; Couchot, F; Coulais, A; Crill, B P; Curto, A; Cuttaia, F; Danese, L; Davies, R D; Davis, R J; de Bernardis, P; de Rosa, A; de Zotti, G; Delabrouille, J; Delouis, J -M; Désert, F -X; Dickinson, C; Diego, J M; Dolag, K; Dole, H; Donzelli, S; Doré, O; Douspis, M; Dunkley, J; Dupac, X; Efstathiou, G; Elsner, F; Enßlin, T A; Eriksen, H K; Finelli, F; Forni, O; Frailis, M; Fraisse, A A; Franceschi, E; Gaier, T C; Galeotta, S; Galli, S; Ganga, K; Giard, M; Giardino, G; Giraud-Héraud, Y; Gjerløw, E; González-Nuevo, J; Górski, K M; Gratton, S; Gregorio, A; Gruppuso, A; Gudmundsson, J E; Haissinski, J; Hamann, J; Hansen, F K; Hanson, D; Harrison, D; Henrot-Versillé, S; Hernández-Monteagudo, C; Herranz, D; Hildebrandt, S R; Hivon, E; Hobson, M; Holmes, W A; Hornstrup, A; Hou, Z; Hovest, W; Huffenberger, K M; Jaffe, T R; Jaffe, A H; Jewell, J; Jones, W C; Juvela, M; Keihänen, E; Keskitalo, R; Kisner, T S; Kneissl, R; Knoche, J; Knox, L; Kunz, M; Kurki-Suonio, H; Lagache, G; Lähteenmäki, A; Lamarre, J -M; Lasenby, A; Lattanzi, M; Laureijs, R J; Lawrence, C R; Leach, S; Leahy, J P; Leonardi, R; León-Tavares, J; Lesgourgues, J; Lewis, A; Liguori, M; Lilje, P B; Linden-Vørnle, M; López-Caniego, M; Lubin, P M; Macías-Pérez, J F; Maffei, B; Maino, D; Mandolesi, N; Maris, M; Marshall, D J; Martin, P G; Martínez-González, E; Masi, S; Matarrese, S; Matthai, F; Mazzotta, P; Meinhold, P R; Melchiorri, A; Melin, J -B; Mendes, L; Menegoni, E; Mennella, A; Migliaccio, M; Millea, M; Mitra, S; Miville-Deschênes, M -A; Moneti, A; Montier, L; Morgante, G; Mortlock, D; Moss, A; Munshi, D; Naselsky, P; Nati, F; Natoli, P; Netterfield, C B; Nørgaard-Nielsen, H U; Noviello, F; Novikov, D; Novikov, I; O'Dwyer, I J; Osborne, S; Oxborrow, C A; Paci, F; Pagano, L; Pajot, F; Paoletti, D; Partridge, B; Pasian, F; Patanchon, G; Pearson, D; Pearson, T J; Peiris, H V; Perdereau, O; Perotto, L; Perrotta, F; Pettorino, V; Piacentini, F; Piat, M; Pierpaoli, E; Pietrobon, D; Plaszczynski, S; Platania, P; Pointecouteau, E; Polenta, G; Ponthieu, N; Popa, L; Poutanen, T; Pratt, G W; Prézeau, G; Prunet, S; Puget, J -L; Rachen, J P; Reach, W T; Rebolo, R; Reinecke, M; Remazeilles, M; Renault, C; Ricciardi, S; Riller, T; Ristorcelli, I; Rocha, G; Rosset, C; Roudier, G; Rowan-Robinson, M; Rubiño-Martín, J A; Rusholme, B; Sandri, M; Santos, D; Savelainen, M; Savini, G; Scott, D; Seiffert, M D; Shellard, E P S; Spencer, L D; Starck, J -L; Stolyarov, V; Stompor, R; Sudiwala, R; Sunyaev, R; Sureau, F; Sutton, D; Suur-Uski, A -S; Sygnet, J -F; Tauber, J A; Tavagnacco, D; Terenzi, L; Toffolatti, L; Tomasi, M; Tristram, M; Tucci, M; Tuovinen, J; Türler, M; Umana, G; Valenziano, L; Valiviita, J; Van Tent, B; Vielva, P; Villa, F; Vittorio, N; Wade, L A; Wandelt, B D; Wehus, I K; White, M; White, S D M; Wilkinson, A; Yvon, D; Zacchei, A; Zonca, A

2013-01-01T23:59:59.000Z

69

Ceramic Cross Flow Recuperator Design Parameters  

E-Print Network (OSTI)

GTE Products Corporation has developed a compact ceramic cross flow recuperator for high temperature industrial heat recovery applications. They recently completed a jointly funded project with the DOE, (Contract #EX-76-C-0 1-2162) to demonstrate the performance of the ceramic recuperator in various industrial furnaces. The ceramic cross flow recuperator core has multiple rectangular flow passages (perpendicular to each other) for the air and gas. Various flow passages are available contingent upon requirements of the particular application. In selecting and sizing a matrix for a given application, one may design a recuperator on the basis of a minimum for one or more of the following parameters; frontal area, length, volume, weight, pressure drop and cost. This paper discusses how the designer can select an optimum design from the various heat exchanger surfaces available and then predict the performance of a recuperator in any given application. The results of wind tunnel tests utilizing a single blow technique, determining a heat transfer parameter, the Colburn factor (j), and a flow friction parameter, Fanning Friction factor (f) are presented and discussed. Methods that illustrate how the (j) and (f) data can be used to compare the relative merits of two or more heat exchanger surface are presented. A typical furnace recuperation example is presented and calculations are detailed to illustrate the design procedures.

Gonzalez, J. M.; Rebello, W. J.

1981-01-01T23:59:59.000Z

70

THERMOPHORESIS AND ITS THERMAL PARAMETERS FOR AEROSOL COLLECTION  

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

THERMOPHORESIS AND ITS THERMAL PARAMETERS FOR AEROSOL COLLECTION Title THERMOPHORESIS AND ITS THERMAL PARAMETERS FOR AEROSOL COLLECTION Publication Type Journal Article LBNL Report...

71

Cosmological Parameters and Quintessence From Radio Galaxies  

E-Print Network (OSTI)

FRIIb radio galaxies provide a tool to determine the coordinate distance to sources at redshifts from zero to two. The coordinate distance depends on the present values of global cosmological parameters, quintessence, and the equation of state of quintessence. The coordinate distance provides one of the cleanest determinations of global cosmological parameters because it does not depend on the clustering properties of any of the mass-energy components present in the universe. Two complementary methods that provide direct determinations of the coordinate distance to sources with redshifts out to one or two are the modified standard yardstick method utilizing FRIIb radio galaxies, and the modified standard candle method utilizing type Ia supernovae. These two methods are compared here, and are found to be complementary in many ways. The two methods do differ in some regards; perhaps the most significant difference is that the radio galaxy method is completely independent of the local distance scale and independent of the properties of local sources, while the supernovae method is very closely tied to the local distance scale and the properties of local sources. FRIIb radio galaxies provide one of the very few reliable probes of the coordinate distance to sources with redshifts out to two. This method indicates that the current value of the density parameter in non-relativistic matter, ?m, must be low, irrespective of whether the universe is spatially flat, and of whether a significant cosmological constant or quintessence pervades the universe at the present epoch. The effect of quintessence, with equation of state w, is considered. FRIIb radio galaxies indicate that the universe is currently accelerating in its expansion if the primary components of the universe at the present epoch are non-relativistic matter and quintessence, and the universe is spatially flat. 1.

A. Daly; Erick J. Guerra

2001-01-01T23:59:59.000Z

72

Cosmological constraints on the curvaton web parameters  

E-Print Network (OSTI)

We consider the mixed inflaton-curvaton scenario in which quantum fluctuations of the curvaton field during inflation lead to a relatively large curvature perturbation spectrum at small scales. We use the model of chaotic inflation with quadratic potential including supergravity corrections leading to a large positive tilt in the power spectrum of the curvaton field. The model is characterized by the strongly inhomogeneous curvaton field in the Universe and large non-Gaussianity of curvature perturbations at small scales. We obtained the constraints on the model parameters considering the process of primordial black hole (PBH) production in radiation era.

Edgar Bugaev; Peter Klimai

2012-12-28T23:59:59.000Z

73

Parameter Studies for the VISTA Spacecraft Concept  

DOE Green Energy (OSTI)

The baseline design for the VISTA spacecraft concept employs a diode-pumped solid-state laser (DPSSL) driver. This type of driver is now under development at LLNL and elsewhere as an extension of the mature solid-state (glass) laser technology developed for terrestrial applications of inertial confinement fusion (ICF). A DPSSL is repratable up to at least 30 Hz, and has an efficiency soon to be experimentally verified of at least 10%. By using a detailed systems code including the essential physics of a DPSSL, we have run parameter studies for the baseline roundtrip (RT) to Mars with a 100-ton payload. We describe the results of these studies as a function of the optimized (minimum) RT flight duration. We also demonstrate why DT fuel gives the best performance, although DD, D3He, or even antimatter can be used, and why DT-ignited DD is probably the fuel most preferred. We also describe the overall power flow, showing where the fusion energy is ultimately utilized, and estimate the variation in performance to the planets dictated by variations in target gain and other parameters.

Orth, C D

2000-11-21T23:59:59.000Z

74

Photon Source Parameters | Stanford Synchrotron Radiation Lightsource  

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

Photon Source Parameters Photon Source Parameters SSRL Beam Line Map | Beam Lines by Techniques | Beam Lines by Number Beam Energy 3 GeV Injection Energy 3 GeV Current 300-500 mA Fill Pattern 270 bunches distributed in six groups of 45 with 17 bunch gaps in between Circumferenc 234.137 Radio Frequency 476.315 MHz Bunch Spacing 2.1 n Horizontal Emittance 10 nm*rad Vertical Emittance 14 pm*rad Critical Energy 7.6 keV Energy Spread 0.097 Lifetime 12 hours @ 350 mA e- size (x,y) Dipole: 140, 14 µm rms Standard ID: 310, 8 µm rms Chicane ID: 300, 5 µm rms e- divergence (x,y) Dipole: 180, 2.9 µrad rms Standard ID: 33, 1.7 µrad rms Chicane ID: 34, 2.9 µrad rms Bunch Length 20 psec rms (6.0 mm rms) Straight sections for IDs (available ID length) 9 x 2.3 m 4 x 3.7 m 2 x 1.5 m (Chicane)

75

Determining Supersymmetric Parameters With Dark Matter Experiments  

Science Conference Proceedings (OSTI)

In this article, we explore the ability of direct and indirect dark matter experiments to not only detect neutralino dark matter, but to constrain and measure the parameters of supersymmetry. In particular, we explore the relationship between the phenomenological quantities relevant to dark matter experiments, such as the neutralino annihilation and elastic scattering cross sections, and the underlying characteristics of the supersymmetric model, such as the values of {mu} (and the composition of the lightest neutralino), m{sub A} and tan {beta}. We explore a broad range of supersymmetric models and then focus on a smaller set of benchmark models. We find that by combining astrophysical observations with collider measurements, {mu} can often be constrained far more tightly than it can be from LHC data alone. In models in the A-funnel region of parameter space, we find that dark matter experiments can potentially determine m{sub A} to roughly {+-}100 GeV, even when heavy neutral MSSM Higgs bosons (A, H{sub 1}) cannot be observed at the LHC. The information provided by astrophysical experiments is often highly complementary to the information most easily ascertained at colliders.

Hooper, Dan; /Fermilab; Taylor, Andrew M.; /Oxford U.

2006-07-01T23:59:59.000Z

76

Constraints on cosmological parameters from MAXIMA-1  

SciTech Connect

We set new constraints on a seven-dimensional space of cosmological parameters within the class of inflationary adiabatic models. We use the angular power spectrum of the cosmic microwave background measured over a wide range of l in the first flight of the MAXIMA balloon-borne experiment (MAXIMA-1) and the low-l results from the COBE Differential Microwave Radiometer experiment. We find constraints on the total energy density of the universe, Omega = 1.0(-0.30)(+0.15), the physical density of baryons, Omega (b)h(2) = 0.03 +/- 0.01, the physical density of cold dark matter, Omega (cdm)h(2) = 0.2(-0.1)(+0.2), and the spectral index of primordial scalar fluctuations, n(s) = 1.08 +/- 0.1,all at the 95 percent confidence level. By combining our results with measurements of high-redshift supernovae we constrain the value of the cosmological constant and the fractional amount of pressureless matter in the universe to 0.45<(Lambda)<0.75 and 0.25parameter deduced from large-scale structure, and in marginal agreement with the baryon density from big bang nucleosynthesis.

Balbi, A.; Ade, P.; Bock, J.; Borrill, J.; Boscaleri, A.; DeBernardis, P.; Ferreira, P.G.; Hanany, S.; Hristov, V.; Jaffe, A.H.; Lee,A.T.; Oh, S.; Pascale; E.; Rabii, B.; Richards, R.L.; Smoot, G.F.; Stompor, R.; Winant, C.D.; Wu, J.H.P.

2006-05-08T23:59:59.000Z

77

Parameter exploration of optically trapped liquid aerosols  

E-Print Network (OSTI)

When studying the motion of optically trapped particles on the $\\mu s$ time scale, in low viscous media such as air, inertia cannot be neglected. Resolution of unusual and interesting behaviour not seen in colloidal trapping experiments is possible. In attempt to explain the phenomena we use power spectral methods to perform a parameter study of the Brownian motion of optically trapped liquid aerosol droplets concentrated around the critically damped regime. We present evidence that the system is suitably described by a simple harmonic oscillator model which must include a description of Fax\\'{e}n's correction, but not necessarily frequency dependent hydrodynamic corrections to Stokes' law. We also provide results describing how the system behaves under several variables and discuss the difficulty in decoupling the parameters responsible for the observed behaviour. We show that due to the relatively low dynamic viscosity and high trap stiffness it is easy to transfer between over- and under-damped motion by experimentally altering either trap stiffness or damping. Our results suggest stable aerosol trapping may be achieved in under-damped conditions, but the onset of deleterious optical forces at high trapping powers prevents the probing of the upper stability limits due to Brownian motion.

D. R. Burnham; P. J. Reece; D. McGloin

2009-07-27T23:59:59.000Z

78

A New Parameter Identification Method for Hydraulic Fractured Gas Wells  

Science Conference Proceedings (OSTI)

The relaxation search algorithm to identify the parameters of hydraulic fractured gas wells is developed in this paper based on the inductive matrix. According to the optimization theory and parallel computation method, the parameters to be identified ... Keywords: Gas Wells, hydraulic fracturing, formation parameters, parameter identification, historic fitting

Li Tiejun; Guo Dali; Min Chao

2010-12-01T23:59:59.000Z

79

Freeze-out parameters: lattice meets experiment  

E-Print Network (OSTI)

We present our results for ratios of higher order fluctuations of electric charge as functions of the temperature. These results are obtained in a system of 2+1 quark flavors at physical quark masses and continuum extrapolated. We compare them to preliminary data on higher order moments of the net electric charge distribution from the STAR collaboration. This allows us to determine the freeze-out temperature and chemical potential from first principles. We also show continuum-extrapolated results for ratios of higher order fluctuations of baryon number. These will allow to test the consistency of the approach, by comparing them to the corresponding experimental data (once they become available) and thus extracting the freeze-out parameters in an independent way.

S. Borsanyi; Z. Fodor; S. D. Katz; S. Krieg; C. Ratti; K. K. Szabo

2013-05-22T23:59:59.000Z

80

New approaches to estimation of magnetotelluric parameters  

DOE Green Energy (OSTI)

Fully efficient robust data processing procedures were developed and tested for single station and remote reference magnetotelluric (Mr) data. Substantial progress was made on development, testing and comparison of optimal procedures for single station data. A principal finding of this phase of the research was that the simplest robust procedures can be more heavily biased by noise in the (input) magnetic fields, than standard least squares estimates. To deal with this difficulty we developed a robust processing scheme which combined the regression M-estimate with coherence presorting. This hybrid approach greatly improves impedance estimates, particularly in the low signal-to-noise conditions often encountered in the dead band'' (0.1--0.0 hz). The methods, and the results of comparisons of various single station estimators are described in detail. Progress was made on developing methods for estimating static distortion parameters, and for testing hypotheses about the underlying dimensionality of the geological section.

Egbert, G.D.

1991-01-01T23:59:59.000Z

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81

Higgs mass determined by cosmological parameters  

E-Print Network (OSTI)

Postulating that all massless elementary fields have conformal scaling symmetry removes a conflict between gravitational theory and the standard model of elementary quantum fields. If the scalar field essential to SU(2) symmetry breaking has conformal symmetry, it must depend explicitly on the Ricci curvature scalar of gravitational theory. This has profound consequences for both cosmology and elementary particle physics, since cosmological data determine scalar field parameters. A modified Friedmann equation is derived and solved numerically. The theory is consistent with all relevant data for supernovae redshifts below $z=1$. The implied value of the cosmological constant implies extremely small Higgs mass, far below current empirical lower bounds. Detection of a Higgs boson with large mass would falsify this argument.

R. K. Nesbet

2008-11-25T23:59:59.000Z

82

Moose models with vanishing $S$ parameter  

E-Print Network (OSTI)

In the linear moose framework, which naturally emerges in deconstruction models, we show that there is a unique solution for the vanishing of the $S$ parameter at the lowest order in the weak interactions. We consider an effective gauge theory based on $K$ SU(2) gauge groups, $K+1$ chiral fields and electroweak groups $SU(2)_L$ and $U(1)_Y$ at the ends of the chain of the moose. $S$ vanishes when a link in the moose chain is cut. As a consequence one has to introduce a dynamical non local field connecting the two ends of the moose. Then the model acquires an additional custodial symmetry which protects this result. We examine also the possibility of a strong suppression of $S$ through an exponential behavior of the link couplings as suggested by Randall Sundrum metric.

R. Casalbuoni; S. De Curtis; D. Dominici

2004-05-19T23:59:59.000Z

83

Moose models with vanishing S parameter  

Science Conference Proceedings (OSTI)

In the linear moose framework, which naturally emerges in deconstruction models, we show that there is a unique solution for the vanishing of the S parameter at the lowest order in the weak interactions. We consider an effective gauge theory based on K SU(2) gauge groups, K+1 chiral fields, and electroweak groups SU(2){sub L} and U(1){sub Y} at the ends of the chain of the moose. S vanishes when a link in the moose chain is cut. As a consequence one has to introduce a dynamical nonlocal field connecting the two ends of the moose. Then the model acquires an additional custodial symmetry which protects this result. We examine also the possibility of a strong suppression of S through an exponential behavior of the link couplings as suggested by the Randall Sundrum metric.

Casalbuoni, R.; De Curtis, S.; Dominici, D. [Department of Physics, University of Florence, and INFN, Florence (Italy)

2004-09-01T23:59:59.000Z

84

Predicting hole enlargement from drilling parameters  

Science Conference Proceedings (OSTI)

This article points out that most problems associated with inadequate hole cleaning stem from hole enlargement. Lower annular velocities are required if no enlargement occurs. However, hole enlargement is often significant and can reduce annular velocities below the critical values. A simple approach is performed to predict well bore hole enlargement from drilling parameters. While the equipment and techniques are available to control mud weight going into the hole, the annular mud weight may become excessive. This annular mud weight is utilized to predict hole enlargement. A balance of the mass rate of cuttings generated and the mass rate of mud pumped is performed in order to predict hole enlargement. Data required for this procedure are inlet mud density, outlet mud density, average formation density, average formation porosity, bit size, mud flow rate and the rate of penetration.

Bizanti, M.S.

1987-01-01T23:59:59.000Z

85

Study of the decay asymmetry parameter and CP violation parameter in the Lambdac+ --> Lambda pi+ decay  

E-Print Network (OSTI)

Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement of the weak decay-asymmetry parameter alpha(Lambdac) in Lambdac --> Lambda pi decay. Comparing particle with antiparticle decays, we obtain the first measurement of the CP violation parameter : A = [alpha(Lambdac)+alpha(antiLambda_c)]/[alpha(Lambdac)-alpha(antiLambda_c)]. We obtain alpha(Lambdac)=-0.78+-0.16+-0.13 and A = -0.07+-0.19+-0.12 where errors are statistical and systematic.

J. M. Link

2005-09-28T23:59:59.000Z

86

Modelling the lattice parameter of plutonium -aluminium solid solution Richard Darby Modelling the Lattice Parameter of  

E-Print Network (OSTI)

of the ability of alloying to stabilise high temperature phases of plutonium, in particular the phase at room of these plutonium alloys' lattice parameters with both temperature and solute addition is complicated changes could compromise structural stability where plutonium alloys are contained by another material

Cambridge, University of

87

Great Plains ASPEN Model Development: binary interaction parameters and activity coefficient parameters. Final report  

Science Conference Proceedings (OSTI)

The simulation of the various sections of the Great Plains Coal Gasification Plant involves modelling vapor-liquid equilibria and liquid-liquid equilibria that are highly nonideal. The Peng-Robinson equation of state, modified for water, was used in the simulation of most of the process sections. Interaction parameters established by regression of literature data, using ASPEN's DRS system, along with interaction parameter values found in the literature, became the database for the simulation. In two of the sections, the Oxygen Plant and the TEG drying of the product SNG, activity coefficient models were used because they gave a better prediction of the phase equilibrium. For the Rectisol unit, which removes hydrogen sulfide from the gas, parameters available from a DOE sponsored contract, Tristate, were used, after verification, for the ASPEN modified version of the RKS. The phases that were predicted using these parameters were checked against literature data and, in most cases, the liquid mole fractions of carbon dioxide predicted by the correlation were within 10% of those reported. A model that would predict phase equilibrium, based on the ionization of Lewis acids and bases and salts, would have been an ideal choice for simulation of the Stretford and Phosam flowsheets. However, only limited temperature dependent liquid activity coefficients data are available in the literature for the ionic species found in the Stretford and Phosam solutions, from which correlation parameters could be obtained by regression. Also, only the flash model can handle this type of calculation; therefore, it was used only to a limited extent in the simulation of the Stretford Unit Absorber. 118 references.

Stern, S.S.; Millman, M.C.; Kirman, J.J.; Nwogu, D.

1984-12-01T23:59:59.000Z

88

QGESS: CO2 Impurity Design Parameters  

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

Q Q U U A A L L I I T T Y Y G G U U I I D D E E L L I I N N E E S S F F O O R R E E N N E E R R G G Y Y S S Y Y S S T T E E M M S S T T U U D D I I E E S S C C O O 2 2 I I m m p p u u r r i i t t y y D D e e s s i i g g n n P P a a r r a a m m e e t t e e r r s s DOE/NETL-2010/???? DOE/NETL-341/011212 August 2013 CO 2 Impurity Design Parameters Quality Guidelines for Energy System Studies Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights.

89

Fundamental Parameters and Chemical Composition of Arcturus  

E-Print Network (OSTI)

We derive a self-consistent set of atmospheric parameters and abundances of 17 elements for the red giant star Arcturus: Teff = 4286+/-30 K, logg = 1.66+/-0.05, and [Fe/H] = -0.52+/-0.04. The effective temperature was determined using model atmosphere fits to the observed spectral energy distribution from the blue to the mid-infrared (0.44 to 10 um). The surface gravity was calculated using the trigonometric parallax of the star and stellar evolution models. A differential abundance analysis relative to the solar spectrum allowed us to derive iron abundances from equivalent width measurements of 37 FeI and 9 FeII lines, unblended in the spectra of both Arcturus and the Sun; the [Fe/H] value adopted is derived from FeI lines. We also determine the mass, radius, and age of Arcturus: M = 1.08+/-0.06 Msun, R = 25.4+/-0.2 Rsun, and t = 7.1(+1.5/-1.2) Gyr. Finally, abundances of the following elements are measured from an equivalent width analysis of atomic features: C, O, Na, Mg, Al, Si, K, Ca, Sc, Ti, V, Cr, Mn, ...

Ramirez, I

2011-01-01T23:59:59.000Z

90

Radiative Transfer through Media with Uncertain or Variable Parameters  

Science Conference Proceedings (OSTI)

While it is now possible to compute the optical transmission, reflection and absorption of a homogeneous horizontal layer of known parameters to great accuracy, the input parameters (optical depth, scattering phase function and single-scattering ...

Keith Ronnholm; M. B. Baker; Halstead Harrison

1980-06-01T23:59:59.000Z

91

Dual volatility and dependence parameters and the copula  

Science Conference Proceedings (OSTI)

We introduce some new species into the zoo of stochastic volatility and dependence parameters. We start with average absolute deviation and Gini index, which are elementary volatility parameters of first and second order in spirit of dual theory of choice ...

Dieter Denneberg; Nikola Leufer

2008-08-01T23:59:59.000Z

92

Multichannel Satellite Retrieval of Cloud Parameter Probability Distribution Functions  

Science Conference Proceedings (OSTI)

A retrieval method has been developed to directly retrieve statistics of cloud parameters from Geostationary Operational Environmental Satellite (GOES) visible and infrared imager data. This method retrieves cloud parameter probability density ...

Darren McKague; K. Franklin Evans

2002-04-01T23:59:59.000Z

93

Parameter identification for chemical models in combustion problems  

Science Conference Proceedings (OSTI)

We present an algorithm for parameter identification in combustion problems modeled by partial differential equations. The method includes local mesh refinement controlled by a posteriori error estimation with respect to the error in the parameters. ...

R. Becker; M. Braack; B. Vexler

2005-08-01T23:59:59.000Z

94

Prediction of Ductility Parameter and its correlation with Electrical ...  

Science Conference Proceedings (OSTI)

Nickel Recovery from Sukinda Chromite Overburden Using Shewanella Putrefaciens · Optimization of Process Parameters on the Siffusion Bonding of a ...

95

Brainwaves as a Biometric Parameter for Unique Identification and Authentication  

A number of biometric parameters exist for positive identification of individuals including, fingerprints, facial recognition, ear pattern, eye iris ...

96

Exploring the evolution of color-luminosity parameter $\\beta$ and its effects on parameter estimation  

E-Print Network (OSTI)

In Phys. Rev. D 88, 043511 (2013), using the Supernova Legacy Survey Three Year (SNLS3) data, Wang & Wang found that there is a strong evidence for the redshift-evolution of color-luminosity parameter $\\beta$. In this paper, using three simplest dark energy models ($\\Lambda$CDM, $w$CDM, and CPL), we further explore the evolution of $\\beta$ and its effects on parameter estimation. In addition to the SNLS3 data, we also take into account the Planck distance priors data, as well as the latest galaxy clustering (GC) data extracted from SDSS DR7 and BOSS. We find that, for all the models, $\\beta$ deviates from a constant at 5$\\sigma$ confidence levels. Moreover, adding a parameter of $\\beta$ can reduce the best-fit values of $\\chi^2$ by $\\sim$ 35, showing the importance of considering the evolution of $\\beta$ in the cosmology-fits. We find that, using the SNLS3 data alone, varying $\\beta$ yields a larger $\\Omega_m$ for the $\\Lambda$CDM model; using the SNLS3+CMB+GC data, varying $\\beta$ yields a larger $\\Omega...

Wang, Shuang; Zhang, Xin

2013-01-01T23:59:59.000Z

97

Hybrid fuzzy-mechanistic models for addressing parameter variability  

Science Conference Proceedings (OSTI)

A simulation approach which integrates mechanistic models and fuzzy logic in order to accommodate parameter variability is developed and explored. The approach modifies a mechanistic model, such as a runoff model, for which the values of the parameters ... Keywords: Algal concentration modelling, Fuzzy logic, Model parameters, Modelling, Runoff modelling

Nicolas Lauzon; Barbara J. Lence

2008-05-01T23:59:59.000Z

98

Parameter extraction from I-V characteristics of PV devices  

Science Conference Proceedings (OSTI)

Device parameters such as series and shunt resistances, saturation current and diode ideality factor influence the behaviour of the current-voltage (I-V) characteristics of solar cells and photovoltaic modules. It is necessary to determine these parameters since performance parameters are derived from the I-V curve and information provided by the device parameters are useful in analyzing performance losses. This contribution presents device parameters of CuIn(Se,S){sub 2}- and Cu(In,Ga)(Se,S){sub 2}-based solar cells, as well as, CuInSe{sub 2}, mono- and multicrystalline silicon modules determined using a parameter extraction routine that employs Particle Swarm Optimization. The device parameters of the CuIn(Se,S){sub 2}- and Cu(In,Ga)(Se,S){sub 2}-based solar cells show that the contribution of recombination mechanisms exhibited by high saturation current when coupled with the effects of parasitic resistances result in lower maximum power and conversion efficiency. Device parameters of photovoltaic modules extracted from I-V characteristics obtained at higher temperature show increased saturation current. The extracted values also reflect the adverse effect of temperature on parasitic resistances. The parameters extracted from I-V curves offer an understanding of the different mechanisms involved in the operation of the devices. The parameter extraction routine utilized in this study is a useful tool in determining the device parameters which reveal the mechanisms affecting device performance. (author)

Macabebe, Erees Queen B. [Department of Electronics, Computer and Communications Engineering, Ateneo de Manila University, Loyola Heights, Quezon City 1108 (Philippines); Department of Physics and Centre for Energy Research, Nelson Mandela Metropolitan University, PO Box 77000, Port Elizabeth 6031 (South Africa); Sheppard, Charles J. [Department of Physics, University of Johannesburg, PO Box 524, Auckland Park 2006 (South Africa); Dyk, E. Ernest van [Department of Physics and Centre for Energy Research, Nelson Mandela Metropolitan University, PO Box 77000, Port Elizabeth 6031 (South Africa)

2011-01-15T23:59:59.000Z

99

Parameter Estimation from an Optimal Projection in a Local Environment  

E-Print Network (OSTI)

The parameter fit from a model grid is limited by our capability to reduce the number of models, taking into account the number of parameters and the non linear variation of the models with the parameters. The Local MultiLinear Regression (LMLR) algorithms allow one to fit linearly the data in a local environment. The MATISSE algorithm, developed in the context of the estimation of stellar parameters from the Gaia RVS spectra, is connected to this class of estimators. A two-steps procedure was introduced. A raw parameter estimation is first done in order to localize the parameter environment. The parameters are then estimated by projection on specific vectors computed for an optimal estimation. The MATISSE method is compared to the estimation using the objective analysis. In this framework, the kernel choice plays an important role. The environment needed for the parameter estimation can result from it. The determination of a first parameter set can be also avoided for this analysis. These procedures based on a local projection can be fruitfully applied to non linear parameter estimation if the number of data sets to be fitted is greater than the number of models.

A. Bijaoui; A. Recio-Blanco; P. de Laverny

2008-11-03T23:59:59.000Z

100

Constraining gravitational and cosmological parameters with astrophysical data  

E-Print Network (OSTI)

We use astrophysical data to shed light on fundamental physics by constraining parametrized theoretical cosmological and gravitational models. Gravitational parameters are those constants that parametrize possible departures ...

Mao, Yi, Ph. D. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

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


101

Effect of Chemical Composition and Process Parameters on DIFT ...  

Science Conference Proceedings (OSTI)

In the present study, the effect of different process parameters as temperature, strain, strain rate, prior austenite grain size and chemical composition (carbon, ...

102

Brainwaves as a Biometric Parameter for Unique Identification ...  

of a person’s identity including federal/state/local government and financial institutions. ... E-mail: simsdl@ornl.gov Brainwaves as a Biometric Parameter for

103

The influence of compost physical parameters on microbial oxygen uptake.  

E-Print Network (OSTI)

??The wide range of optimal values reported for the physical parameters of compost mixtures suggest that their interactive relationships should be investigated. The objective of… (more)

Mohajer, Ardavan

2009-01-01T23:59:59.000Z

104

Hydrochemistry of selected parameters at the Raft River KGRA...  

Open Energy Info (EERE)

Hydrochemistry of selected parameters at the Raft River KGRA, Cassia County, Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Hydrochemistry of selected...

105

Evaluation of testing and reservoir parameters in geothermal...  

Open Energy Info (EERE)

testing and reservoir parameters in geothermal wells at Raft River and Boise, Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Evaluation...

106

Influence of Different Parameters on Theoretical Flame Temperature ...  

Science Conference Proceedings (OSTI)

One of the main parameters to measure the thermal state in Corex melter gasifier is the theoretical flame temperature (TFT) before tuyere, which is important to ...

107

Data-free inference of uncertain model parameters.  

SciTech Connect

It is known that, in general, the correlation structure in the joint distribution of model parameters is critical to the uncertainty analysis of that model. Very often, however, studies in the literature only report nominal values for parameters inferred from data, along with confidence intervals for these parameters, but no details on the correlation or full joint distribution of these parameters. When neither posterior nor data are available, but only summary statistics such as nominal values and confidence intervals, a joint PDF must be chosen. Given the summary statistics it may not be reasonable nor necessary to assume the parameters are independent random variables. We demonstrate, using a Bayesian inference procedure, how to construct a posterior density for the parameters exhibiting self consistent correlations, in the absence of data, given (1) the fit-model, (2) nominal parameter values, (3) bounds on the parameters, and (4) a postulated statistical model, around the fit-model, for the missing data. Our approach ensures external Bayesian updating while marginalizing over possible data realizations. We then address the matching of given parameter bounds through the choice of hyperparameters, which are introduced in postulating the statistical model, but are not given nominal values. We discuss some possible approaches, including (1) inferring them in a separate Bayesian inference loop and (2) optimization. We also perform an empirical evaluation of the algorithm showing the posterior obtained with this data free inference compares well with the true posterior obtained from inference against the full data set.

Marzouk, Youssef M. (MIT, Cambridge, MA); Adalsteinsson, Helgi; Debusschere, Bert J.; Najm, Habib N.; Berry, Robert Bruce

2010-06-01T23:59:59.000Z

108

Parameters Impacting Crossflow Filter Performance of Hanford Tank ...  

Parameters Impacting Crossflow Filter Performance of Hanford Tank Waste Simulants Reid Peterson Justin Billings, Carolyn Burns, Richard Daniel, Phil Schonewill, Rick ...

109

IBM: parameter symmetry, hidden symmetries and transformations of boson operators  

E-Print Network (OSTI)

A symmetry of the parameter space of interacting boson models IBM-1 and IBM-2 is studied. The symmetry is associated with linear canonical transformations of boson operators, or, equivalently, with the existence of different realizations of the symmetry algebras of the models. The relevance of the parameter symmetry to physical observables is discussed.

A. M. Shirokov; N. A. Smirnova; Yu. F. Smirnov; O. Castaños; A. Frank

1999-04-07T23:59:59.000Z

110

IBM parameter symmetry, hidden symmetries and transformations of boson operators  

E-Print Network (OSTI)

A symmetry of the parameter space of interacting boson models IBM-1 and IBM-2 is studied. The symmetry is associated with linear canonical transformations of boson operators, or, equivalently, with the existence of different realizations of the symmetry algebras of the models. The relevance of the parameter symmetry to physical observables is discussed.

Shirokov, A M; Smirnov, Yu F; Castaños, O; Frank, A I; Smirnov, Yu. F.

1999-01-01T23:59:59.000Z

111

Meta-learning for evolutionary parameter optimization of classifiers  

Science Conference Proceedings (OSTI)

The performance of most of the classification algorithms on a particular dataset is highly dependent on the learning parameters used for training them. Different approaches like grid search or genetic algorithms are frequently employed to find suitable ... Keywords: Feature selection, Genetic algorithm, Meta-learning, Parameter optimization

Matthias Reif; Faisal Shafait; Andreas Dengel

2012-06-01T23:59:59.000Z

112

Adaptive Online Battery Parameters/SOC/Capacity Co-estimation  

E-Print Network (OSTI)

Adaptive Online Battery Parameters/SOC/Capacity Co-estimation Habiballah Rahimi-Eichi and Mo parameters to characterize the performance and application of a battery. Although the nominal capacity and even storage ageing of the battery. Following our previous publications in which we developed an online

Chow, Mo-Yuen

113

Parameter estimation for ridge detection in images with thin structures  

Science Conference Proceedings (OSTI)

This paper presents an analysis of four ridge detectors in images with thin structures: plant root images and retinal images. Two proposed detectors and two detectors from the literature are used. We estimate the optimal parameters for each detector ... Keywords: parameter estimation, ridge detection

Talita Perciano; Roberto Hirata, Jr.; Lúcio André De Castro Jorge

2010-11-01T23:59:59.000Z

114

SVM with stochastic parameter selection for bovine leather defect classification  

Science Conference Proceedings (OSTI)

The performance of Support Vector Machines, as many other machine learning algorithms, is very sensitive to parameter tuning,mainly in real world problems. In this paper, two well known and widely used SVM implementations, Weka SMO and LIBSVM, were compared ... Keywords: parameter tuning, pattern recognition, support vector machines

Roberto Viana; Ricardo B. Rodrigues; Marco A. Alvarez; Hemerson Pistori

2007-12-01T23:59:59.000Z

115

Practical and Theoretical Aspects of Adjoint Parameter Estimation and Identifiability  

E-Print Network (OSTI)

in either the meteorological or the oceanographic literature. As noted by Yeh(1986) in the context of ground water flow parameter estimation the inverse or parameter estimation problem is often ill­posed and beset reservoirs for instance by Carrera and Neuman (1986a, b, c), Yeh(1986), Cushman­Roisin(1986), Sein­ feld

116

Evaluating Parameter Sweep Workflows in High Performance Computing*  

E-Print Network (OSTI)

Evaluating Parameter Sweep Workflows in High Performance Computing* Fernando Chirigati1,# , Vítor a large amount of tasks that are submitted to High Performance Computing (HPC) environments. Different, Parameter Sweep, High Performance Computing (HPC) 1. INTRODUCTION1 # Many scientific experiments are based

Paris-Sud XI, Université de

117

EELE408 Photovoltaics Lecture 11: Solar Cell Parameters  

E-Print Network (OSTI)

1 EELE408 Photovoltaics Lecture 11: Solar Cell Parameters Dr. Todd J. Kaiser tjkaiser@ece.montana.edu Department of Electrical and Computer Engineering Montana State University - Bozeman Solar Cell Parameters Light IL 3 Voltage Illluminating the cell adds to the "dark" current of the diode The IV curve shifts

Kaiser, Todd J.

118

Loop Quantum Corrections to Statefinder Parameters of Dark Energy  

E-Print Network (OSTI)

In this short letter, we presented the explicit forms of the statefinder parameters for the Friedmann-Robertson-Walker (FRW) Universe in the loop quantum cosmology (LQC) for Holographic dark energy and New-Agegraphic dark energy. Numerically we investigated cosmological implications of these parameters for models of dark energy.

Jamil, Mubasher; Myrzakulov, Ratbay

2013-01-01T23:59:59.000Z

119

Loop Quantum Corrections to Statefinder Parameters of Dark Energy  

E-Print Network (OSTI)

In this short letter, we presented the explicit forms of the statefinder parameters for the Friedmann-Robertson-Walker (FRW) Universe in the loop quantum cosmology (LQC) for Holographic dark energy and New-Agegraphic dark energy. Numerically we investigated cosmological implications of these parameters for models of dark energy.

Mubasher Jamil; D. Momeni; Ratbay Myrzakulov

2013-05-17T23:59:59.000Z

120

Parameter estimation and compensation in systems with nonlinearly parameterized perturbations  

Science Conference Proceedings (OSTI)

We consider a class of systems influenced by perturbations that are nonlinearly parameterized by unknown constant parameters, and develop a method for estimating the unknown parameters. The method applies to systems where the states are available for ... Keywords: Adaptive control, Nonlinear observer design, Nonlinear system control, Uncertain nonlinear systems

Håvard Fjær Grip; Tor A. Johansen; Lars Imsland; Glenn-Ole Kaasa

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tox parameter tox" 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

Estimation of synchronous machine parameters by standstill tests  

Science Conference Proceedings (OSTI)

In this paper we present the results of a time-domain identification procedure to estimate the linear parameters of a salient-pole synchronous machine at standstill. A new approach is proposed for the estimation of synchronous machine coupled to DC-chopper ... Keywords: Parameter estimation, Standstill tests, Synchronous machine

M. Hasni; O. Touhami; R. Ibtiouen; M. Fadel; S. Caux

2010-10-01T23:59:59.000Z

122

Data Mining for Soft Sensing Modeling of Power Plant Parameters  

Science Conference Proceedings (OSTI)

As a new modeling thought, the accurate soft sensing model of power plant parameter was established by data mining method, which obtained effective information from the large number of real-time operation data and avoided low accuracy of conventional ... Keywords: data mining, soft sensing, mathematic modeling, power plant parameters, partial least-square regression

Tao Jin; Zhongguang Fu; Gang Liu

2009-08-01T23:59:59.000Z

123

Determination of parameters of a nuclear reactor through noise measurements  

DOE Patents (OSTI)

A method of measuring parameters of a nuclear reactor by noise measurements is described. Noise signals are developed by the detectors placed in the reactor core. The polarity coincidence between the noise signals is used to develop quantities from which various parameters of the reactor can be calculated. (auth)

Cohn, C.E.

1975-07-15T23:59:59.000Z

124

ARM - Evaluation Product - Radiatively Important Parameters Best Estimate  

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

ProductsRadiatively Important Parameters Best ProductsRadiatively Important Parameters Best Estimate (RIPBE) Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Evaluation Product : Radiatively Important Parameters Best Estimate (RIPBE) 2002.03.01 - 2007.06.30 Site(s) SGP General Description The Radiatively Important Parameters Best Estimate (RIPBE) VAP combines multiple input datastreams, each with their own temporal and vertical resolution, to create a complete set of radiatively important parameters on a uniform vertical and temporal grid with quality control and source information for use as input to a radiative transfer model. One of the main drivers for RIPBE was to create input files for the BroadBand Heating Rate Profiles (BBHRP) VAP, but we also envision use of RIPBE files for user-run

125

Public Health Benefits of End-Use Electrical Energy Efficiency in California: An Exploratory Study  

Science Conference Proceedings (OSTI)

This study assesses for California how increasing end-use electrical energy efficiency from installing residential insulation impacts exposures and disease burden from power-plant pollutant emissions. Installation of fiberglass attic insulation in the nearly 3 million electricity-heated homes throughout California is used as a case study. The pollutants nitrous oxides (NO{sub x}), sulfur dioxide (SO{sub 2}), fine particulate matter (PM2.5), benzo(a)pyrene, benzene, and naphthalene are selected for the assessment. Exposure is characterized separately for rural and urban environments using the CalTOX model, which is a key input to the US Environmental Protection Agency (EPA) Tool for the Reduction and Assessment of Chemicals and other environmental Impacts (TRACI). The output of CalTOX provides for urban and rural populations emissions-to-intake factors, which are expressed as an individual intake fraction (iFi). The typical iFi from power plant emissions are on the order of 10{sup -13} (g intake per g emitted) in urban and rural regions. The cumulative (rural and urban) product of emissions, population, and iFi is combined with toxic effects factors to determine human damage factors (HDFs). HDF are expressed as disability adjusted life years (DALYs) per kilogram pollutant emitted. The HDF approach is applied to the insulation case study. Upgrading existing residential insulation to US Department of Energy (DOE) recommended levels eliminates over the assmned 50-year lifetime of the insulation an estimated 1000 DALYs from power-plant emissions per million tonne (Mt) of insulation installed, mostly from the elimination of PM2.5 emissions. In comparison, the estimated burden from the manufacture of this insulation in DALYs per Mt is roughly four orders of magnitude lower than that avoided.

McKone, Thomas E.; Lobscheid, A.B.

2006-06-01T23:59:59.000Z

126

A dimensionless parameter model for arc welding processes  

SciTech Connect

A dimensionless parameter model previously developed for C0{sub 2} laser beam welding has been shown to be applicable to GTAW and PAW autogenous arc welding processes. The model facilitates estimates of weld size, power, and speed based on knowledge of the material`s thermal properties. The dimensionless parameters can also be used to estimate the melting efficiency, which eases development of weld schedules with lower heat input to the weldment. The mathematical relationship between the dimensionless parameters in the model has been shown to be dependent on the heat flow geometry in the weldment.

Fuerschbach, P.W.

1994-12-31T23:59:59.000Z

127

Testing Distributed Parameter Hypotheses for the Detection of Climate Change  

Science Conference Proceedings (OSTI)

A general statistical methodology, based on testing alternative distributed parameter hypotheses, is proposed as a method for deciding whether or not anthropogenic influences are causing climate change. This methodology provides a framework for ...

Haroon S. Kheshgi; Benjamin S. White

2001-08-01T23:59:59.000Z

128

Optimizing Model of Blasting Parameters Based on Fuzzy Neural Network  

Science Conference Proceedings (OSTI)

Because of the complexity and polytropism of rock and the complexity of blasting proceeding, it is very difficult to obtain better blasting parameters with a certain way. In order to gain perfect blasting effects expected by designers, blasting engineers ...

Haiwang Ye; Yang Wang; Jian Chang; Fang Liu; Peng Yao

2009-11-01T23:59:59.000Z

129

Surface Roughness Parameter Estimated with a Drag Technique  

Science Conference Proceedings (OSTI)

The surface roughness parameter, z0, can be estimated with different techniques. These techniques are analyzing the mean wind profile, estimating the surface drag coefficient and using the universal functions according to the Monin-Obukhov ...

Adrie F. G. Jacobs; Emile Schols

1986-11-01T23:59:59.000Z

130

THE EFFECT OF LASER WELDING PROCESS PARAMETERS ON THE MECHANICAL...  

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

1 Journal of Nuclear Materials, vol. 283-287 (2000) 1206 THE EFFECT OF LASER WELDING PROCESS PARAMETERS ON THE MECHANICAL AND MICROSTRUCTURAL PROPERTIES OF V-4Cr-4Ti STRUCTURAL...

131

A Tropical Cyclone Genesis Parameter for the Tropical Atlantic  

Science Conference Proceedings (OSTI)

A parameter to evaluate the potential for tropical cyclone formation (genesis) in the North Atlantic between Africa and the Caribbean islands is developed. Climatologically, this region is the source of about 40% of the Atlantic basin tropical ...

Mark DeMaria; John A. Knaff; Bernadette H. Connell

2001-04-01T23:59:59.000Z

132

Influence of Ground Clutter Contamination on Polarimetric Radar Parameters  

Science Conference Proceedings (OSTI)

The influence of ground clutter contamination on the estimation of polarimetric radar parameters, horizontal reflectivity (Zh), differential reflectivity (Zdr), correlation coefficient (?h?), and differential propagation phase (dp) was examined. ...

Katja Friedrich; Urs Germann; Pierre Tabary

2009-02-01T23:59:59.000Z

133

Spatial Variability and Interpolation of Stochastic Weather Simulation Model Parameters  

Science Conference Proceedings (OSTI)

The spatial variability of 58 precipitation and temperature parameters from the “generation of weather elements for multiple applications” (GEM) weather generator has been investigated over a region of significant complexity in topography and ...

Gregory L. Johnson; Christopher Daly; George H. Taylor; Clayton L. Hanson

2000-06-01T23:59:59.000Z

134

Parameter estimation for performance models of distributed application systems  

Science Conference Proceedings (OSTI)

The performance engineering of distributed applications requires models that capture contention for both hardware and software resources. Layered queueing models have been proposed for modeling distributed applications but they require model parameters ...

Jerome Rolia; Vidar Vetland

1995-11-01T23:59:59.000Z

135

Cirrus Infrared Parameters and Shortwave Reflectance Relations from Observations  

Science Conference Proceedings (OSTI)

A summary of experimental observations and analysis of cirrus from high-altitude aircraft remote sensing is presented. The vertical distribution of cirrus optical and infrared cross-section parameters and the relative effective emittance and ...

James D. Spinhirne; William D. Hart; Dennis L. Hlavka

1996-05-01T23:59:59.000Z

136

Workflow-level parameter study support for production grids  

Science Conference Proceedings (OSTI)

Workflow applications are frequently used in many production Grids. There is a natural need to run the same workflow with many different parameter sets. Unfortunately current Grid portals either do not support this kind of applications or give only specialized ...

Peter Kacsuk; Zoltan Farkas; Gabor Hermann

2007-08-01T23:59:59.000Z

137

Surface-Layer Similarity of the Temperature Structure Parameter  

Science Conference Proceedings (OSTI)

The temperature structure parameter at two heights over a horizontally homogeneous site was measured using optical scintillometers and resistance-wire thermometers. The scintillometers gave systematically greater values than did the wire ...

Reginald J. Hill; Gerard R. Ochs

1992-08-01T23:59:59.000Z

138

A Study of Tracer Distribution Parameter Estimation from Sparse Samples  

Science Conference Proceedings (OSTI)

How do design parameters such as the spacing of sampling stations affect the quality of information obtained from atmospheric dispersion experiments? In large-scale experiments such as the Cross-Appalachian Tracer Experiment (CAPTEX) and the ...

J. Z. Holland

1991-01-01T23:59:59.000Z

139

Model Reduction and Parameter Estimation in Groundwater Modeling  

E-Print Network (OSTI)

Professor William W-G. Yeh, Chair Water resources systemsWilliam W-G. Yeh. Systems analysis in ground-water planningYeh (2012), Reduced order parameter estimation using quasilinearization and quadratic programming, Water

Siade, Adam

2012-01-01T23:59:59.000Z

140

Wavelet Analysis on Solar Wind Parameters and Geomagnetic Indices  

E-Print Network (OSTI)

The sun as an oscillator produces frequencies which propagate in the heliosphere, via solar wind, to the terrestrial magnetosphere. We searched for those frequencies in the parameters of the near Earth solar plasma and the geomagnetic indices for the past four solar cycles. The solar wind parameters used in this work are the interplanetary magnetic field, plasma beta, Alfven Mach number, solar wind speed, plasma temperature, plasma pressure, plasma density and the geomagnetic indices DST, AE, Ap and Kp. We found out that each parameter of the solar wind exhibit certain periodicities which di?erentiate in each cycle. Our results indicate intermittent periodicities in our data, some of them shared between the solar wind parameters and geomagnetic indices.

Katsavrias, Ch; Moussas, X

2012-01-01T23:59:59.000Z

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


141

Analysis of model parameters for a polymer filtration simulator  

Science Conference Proceedings (OSTI)

We examine a simulation model for polymer extrusion filters and determine its sensitivity to filter parameters. The simulator is a three-dimensional, time-dependent discretization of a coupled system of nonlinear partial differential equations used to ...

N. Brackett-Rozinsky; S. Mondal; K. R. Fowler; E. W. Jenkins

2011-01-01T23:59:59.000Z

142

Sinewave parameter estimation using the fast fan-chirp transform  

E-Print Network (OSTI)

Sinewave analysis/synthesis has long been an important tool for audio analysis, modification and synthesis. The recently introduced fan-chirp Transform (FChT) [2,3] has been shown to improve the fidelity of sinewave parameter ...

Dunn, Robert B.

143

Force Field Parameter Estimation of Functional Perfluoropolyether Lubricants  

SciTech Connect

The head disk interface in hard disk drive can be considered one of the hierarchical multiscale systems, which require the hybridization of multiscale modeling methods with coarse-graining procedure. However, the fundamental force field parameters are required to enable the coarse-graining procedure from atomistic/molecular scale to mesoscale models .In this paper, we investigate beyond molecular level and perform ab-initio calculations to obtain the force field parameters. Intramolecular force field parameters for the Zdol and Ztetraol were evaluated with truncated PFPE molecules to allow for feasible quantum calculations while still maintaining the characteristic chemical structure of the end groups. Using the harmonic approximation to the bond and angle potentials, the parameters were derived from the Hessian matrix, and the dihedral force constants are fit to the torsional energy profiles generated by a series of constrained molecular geometry optimization.

Smith, R.; Chung, P.S; Steckel, J.A.; Jhon, M.S; Biegler, L.T.

2011-01-01T23:59:59.000Z

144

Physically Retrieving Cloud and Thermodynamic Parameters from Ultraspectral IR Measurements  

Science Conference Proceedings (OSTI)

A physical inversion scheme has been developed dealing with cloudy as well as cloud-free radiance observed with ultraspectral infrared sounders to simultaneously retrieve surface, atmospheric thermodynamic, and cloud microphysical parameters. A ...

Daniel K. Zhou; William L. Smith Sr.; Xu Liu; Allen M. Larar; Stephen A. Mango; Hung-Lung Huang

2007-03-01T23:59:59.000Z

145

Optimizing Parameters in an Atmospheric General Circulation Model  

Science Conference Proceedings (OSTI)

An efficient method to optimize the parameter values of the subgrid parameterizations of an atmospheric general circulation model is described. The method is based on the downhill simplex minimization of a cost function computed from the ...

C. A. Severijns; W. Hazeleger

2005-09-01T23:59:59.000Z

146

Examination of the ?–? Relation Suggested for Drop Size Distribution Parameters  

Science Conference Proceedings (OSTI)

Raindrop size distributions are often assumed to follow a three-parameter gamma distribution. Since rain intensity retrieval from radar observations is an underdetermined problem, there is great interest in finding physical correlations between ...

Dmitri N. Moisseev; V. Chandrasekar

2007-05-01T23:59:59.000Z

147

Scaling Characteristics of Soil Hydraulic Parameters at Varying Spatial Resolutions  

E-Print Network (OSTI)

This dissertation focuses on the challenge of soil hydraulic parameter scaling in soil hydrology and related applications in general; and, in particular, the upscaling of these parameters to provide effective values at coarse scales. Soil hydraulic properties are required for many hydrological and ecological models at their representative scales. Prediction accuracy of these models is highly dependent on the quality of the model input parameters. However, measurement of parameter data at all such required scales is impractical as that would entail huge outlays of finance, time and effort. Hence, alternate methods of estimating the soil hydraulic parameters at the scales of interest are necessary. Two approaches to bridge this gap between the measurement and application scales for soil hydraulic parameters are presented in this dissertation. The first one is a stochastic approach, based on artificial neural networks (ANNs) applied within a Bayesian framework. ANNs have been used before to derive soil hydraulic parameters from other more easily measured soil properties at matching scales. Here, ANNs were applied with different training and simulation scales. This concept was further extended to work within a Bayesian framework in order to provide estimates of uncertainty in such parameter estimations. Use of ancillary information such as elevation and vegetation data, in addition to the soil physical properties, were also tested. These multiscale pedotransfer function methods were successfully tested with numerical and field studies at different locations and scales. Most upscaling efforts thus far ignore the effect of the topography on the upscaled soil hydraulic parameter values. While this flat-terrain assumption is acceptable at coarse scales of a few hundred meters, at kilometer scales and beyond, the influence of the physical features cannot be ignored. anew upscaling scheme which accounts for variations in topography within a domain was developed to upscale soil hydraulic parameters to hill-slope (kilometer) scales. The algorithm was tested on different synthetically generated topographic configurations with good results. Extending the methodology to field conditions with greater complexities also produced good results. A comparison of different recently developed scaling schemes showed that at hill-slope scales, inclusion of topographic information produced better estimates of effective soil hydraulic parameters at that scale.

Belur Jana, Raghavendra

2010-05-01T23:59:59.000Z

148

Bayesian Methods for Parameter Estimation in Effective Field Theories  

E-Print Network (OSTI)

We demonstrate and explicate Bayesian methods for fitting the parameters that encode the impact of short-distance physics on observables in effective field theories (EFTs). We use Bayes' theorem together with the principle of maximum entropy to account for the prior information that these parameters should be natural, i.e.O(1) in appropriate units. Marginalization can then be employed to integrate the resulting probability density function (pdf) over the EFT parameters that are not of specific interest in the fit. We also explore marginalization over the order of the EFT calculation, M, and over the variable, R, that encodes the inherent ambiguity in the notion that these parameters are O(1). This results in a very general formula for the pdf of the EFT parameters of interest given a data set, D. We use this formula and the simpler "augmented chi-squared" in a toy problem for which we generate pseudo-data. These Bayesian methods, when used in combination with the "naturalness prior", facilitate reliable extractions of EFT parameters in cases where chi-squared methods are ambiguous at best. We also examine the problem of extracting the nucleon mass in the chiral limit, M_0, and the nucleon sigma term, from pseudo-data on the nucleon mass as a function of the pion mass. We find that Bayesian techniques can provide reliable information on M_0, even if some of the data points used for the extraction lie outside the region of applicability of the EFT.

Matthias R. Schindler; Daniel R. Phillips

2008-08-27T23:59:59.000Z

149

Estimating Building Simulation Parameters via Bayesian Structure Learning  

SciTech Connect

Many key building design policies are made using sophisticated computer simulations such as EnergyPlus (E+), the DOE flagship whole-building energy simulation engine. E+ and other sophisticated computer simulations have several major problems. The two main issues are 1) gaps between the simulation model and the actual structure, and 2) limitations of the modeling engine's capabilities. Currently, these problems are addressed by having an engineer manually calibrate simulation parameters to real world data or using algorithmic optimization methods to adjust the building parameters. However, some simulations engines, like E+, are computationally expensive, which makes repeatedly evaluating the simulation engine costly. This work explores addressing this issue by automatically discovering the simulation's internal input and output dependencies from 20 Gigabytes of E+ simulation data, future extensions will use 200 Terabytes of E+ simulation data. The model is validated by inferring building parameters for E+ simulations with ground truth building parameters. Our results indicate that the model accurately represents parameter means with some deviation from the means, but does not support inferring parameter values that exist on the distribution's tail.

Edwards, Richard E [ORNL; New, Joshua Ryan [ORNL; Parker, Lynne Edwards [ORNL

2013-01-01T23:59:59.000Z

150

Climate Parameters from Satellite Spectral Measurements. Part 1: Collocated AVHRR and HIRS/2 Observations of Spectral Greenhouse Parameter  

Science Conference Proceedings (OSTI)

An automated method of monitoring various climate parameters using collocated Advanced Very High Resolution Radiometer (AVHRR) and High-Resolution Infrared Sounder-2 (HIRS/2) observations has been developed. The method, referred to as CHAPS (...

Richard A. Frey; S. A. Ackerman; Brian J. Soden

1996-02-01T23:59:59.000Z

151

Behavior of the Refractive Index Structure Parameter in the Entraining Convective Boundary Layer  

Science Conference Proceedings (OSTI)

The refractive index structure parameter CN2 has contributions from the temperature and humidity structure parameters Cr2 and CQ2 and from the joint structure parameter CTQ. We briefly review the behavior of these structure parameters in the ...

J. C. Wyngaard; M. A. LeMone

1980-07-01T23:59:59.000Z

152

Estimation of stellar atmospheric parameters from SDSS/SEGUE spectra  

E-Print Network (OSTI)

We present techniques for the estimation of stellar atmospheric parameters (Teff,logg,[Fe/H]) for stars from the SDSS/SEGUE survey. The atmospheric parameters are derived from the observed medium-resolution (R=2000) stellar spectra using non-linear regression models trained either on (1) pre-classified observed data or (2) synthetic stellar spectra. In the first case we use our models to automate and generalize parametrization produced by a preliminary version of the SDSS/SEGUE Spectroscopic Parameter Pipeline (SSPP). In the second case we directly model the mapping between synthetic spectra (derived from Kurucz model atmospheres) and the atmospheric parameters, independently of any intermediate estimates. After training, we apply our models to various samples of SDSS spectra to derive atmospheric parameters, and compare our results with those obtained previously by the SSPP for the same samples. We obtain consistency between the two approaches, with RMS deviations of 150K in Teff, 0.35dex in logg, and 0.22dex in [Fe/H]. The models are applied to pre-processed spectra, either via Principal Components Analysis or a Wavelength Range Selection method, which employs a subset of the full 3850-9000A spectral range. This is both for computational reasons, and because it delivers higher accuracy. From an analysis of cluster candidates with available SDSS spectroscopy (M15, M13, M2, and NGC2420), we find evidence for small systematic offsets in Teff and/or logg for the atmospheric parameter estimates from the model trained on real data with the SSPP. Thus, this model turns out to derive more precise, but less accurate, atmospheric parameters than the model trained on synthetic data.

P. Re Fiorentin; C. A. L. Bailer-Jones; Y. S. Lee; T. C. Beers; T. Sivarani; R. Wilhelm; C. Allende Prieto; J. E. Norris

2007-03-13T23:59:59.000Z

153

Estimation of uncertain material parameters using modal test data  

DOE Green Energy (OSTI)

Analytical models of wind turbine blades have many uncertainties, particularly with composite construction where material properties and cross-sectional dimension may not be known or precisely controllable. In this paper the authors demonstrate how modal testing can be used to estimate important material parameters and to update and improve a finite-element (FE) model of a prototype wind turbine blade. An example of prototype blade is used here to demonstrate how model parameters can be identified. The starting point is an FE model of the blade, using best estimates for the material constants. Frequencies of the lowest fourteen modes are used as the basis for comparisons between model predictions and test data. Natural frequencies and mode shapes calculated with the FE model are used in an optimal test design code to select instrumentation (accelerometer) and excitation locations that capture all the desired mode shapes. The FE model is also used to calculate sensitivities of the modal frequencies to each of the uncertain material parameters. These parameters are estimated, or updated, using a weighted least-squares technique to minimize the difference between test frequencies and predicted results. Updated material properties are determined for axial, transverse, and shear moduli in two separate regions of the blade cross section: in the central box, and in the leading and trailing panels. Static FE analyses are then conducted with the updated material parameters to determine changes in effective beam stiffness and buckling loads.

Veers, P.S.; Laird, D.L.; Carne, T.G.; Sagartz, M.J.

1997-11-01T23:59:59.000Z

154

LCLS CDR Chapter 5 - FEL Parameters and Performance  

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

5 5 FEL Parameters and Performance TECHNICAL SYNOPSIS The FEL parameter optimization and performance characterizations that are described in Chapter 5 are based on three-dimensional theory and computer models. The investigation led to a selection of the best parameters and to a study of the sensitivity to changes in values of accelerator components and beam characteristics and to unavoidable imperfections in the settings of the beam characteristics, magnetic and mechanical components and electron beam monitoring. The focusing of the electron beam plays an important role in the production of the FEL radiation. The LCLS undulator optics has been optimized in terms of its focusing lattice and strength. The electron optics consists of FODO cells; with cell lengths between 7.3 m and 7.5 m.

155

Hydrochemistry of selected parameters at the Raft River KGRA, Cassia  

Open Energy Info (EERE)

Hydrochemistry of selected parameters at the Raft River KGRA, Cassia Hydrochemistry of selected parameters at the Raft River KGRA, Cassia County, Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Hydrochemistry of selected parameters at the Raft River KGRA, Cassia County, Idaho Details Activities (1) Areas (1) Regions (0) Abstract: Low to moderate temperature (< 150 0C) geothermal fluids are being developed in the southern Raft River Valley of Idaho. Five deep geothermal wells ranging in depth from 4911 feet to 6543 feet (1490 to 1980 meters) and two intermediate depth (3858 feet or 1170 meters) injection wells have been drilled within the Raft River KGRA. Several shallower (1423-500 feet or 430-150 meters) wells have also been constructed to monitor the environmental effects of geothermal development of the

156

The Optimization of Control Parameters for VAV HVAC System Commissioning  

E-Print Network (OSTI)

One of the technical subjects in commissioning for HVAC system is to enhance control performance and time efficiency, while the tuning of the optimal parameters to control HVAC system takes much time and labor in particular. Therefore, we propose a kind of commissioning technique as follows. We identified the dynamic characteristics of components of an actual VAV HVAC system such as rooms, VAV dampers, two way valves and chilled water coils, and verified the behaviors of the models and choose the optimal control parameters on a personal computer. Then adopting them for the actual system, we verified the control performance. Through the procedure, we showed the possibility of off-site and off-line control parameter tuning to reduce the cost and time at on-site and in on-line using the measured data in a real HVAC system.

Song, S.; Maehara, K.; Sagara, N.

2006-01-01T23:59:59.000Z

157

Conserved charges of order-parameter textures in Dirac systems  

E-Print Network (OSTI)

A simple expression for the induced fermion current in the presence of a texture in mass-order-parameters in two-dimensional condensed-matter Dirac systems is derived using the representation theory of Clifford algebras. In particular, it is shown that every texture in three mutually anticommuting order parameters, in graphene for example, implies an induced density of a properly defined conserved charge. The sufficient condition for the general charge to be the familiar electrical charge is that the remaining two anticommuting order parameters allowed by the particle-hole symmetry are the two phase components of some superconducting order. This allows eight different types of electrically charged textures in graphene or in the $\\pi$-flux Hamiltonian on the square lattice. Generalized charge of mass-textures on the surfaces of thin films of topological insulators, or in spinless Dirac fermions hopping on the honeycomb lattice is also discussed.

Igor F. Herbut; Chi-Ken Lu; Bitan Roy

2012-06-11T23:59:59.000Z

158

Solar Model Parameters and Direct Measurements of Solar Neutrino Fluxes  

E-Print Network (OSTI)

We explore a novel possibility of determining the solar model parameters, which serve as input in the calculations of the solar neutrino fluxes, by exploiting the data from direct measurements of the fluxes. More specifically, we use the rather precise value of the $^8B$ neutrino flux, $\\phi_B$ obtained from the global analysis of the solar neutrino and KamLAND data, to derive constraints on each of the solar model parameters on which $\\phi_B$ depends. We also use more precise values of $^7Be$ and $pp$ fluxes as can be obtained from future prospective data and discuss whether such measurements can help in reducing the uncertainties of one or more input parameters of the Standard Solar Model.

Abhijit Bandyopadhyay; Sandhya Choubey; Srubabati Goswami; S. T. Petcov

2006-08-30T23:59:59.000Z

159

The Dark Side of the Solar Neutrino Parameter Space  

E-Print Network (OSTI)

Results of neutrino oscillation experiments have always been presented on the(sin^2 2theta, Delta m^2) parameter space for the case of two-flavoroscillations. We point out, however, that this parameterization misses the halfof the parameter space pi/4 < theta <= pi/2 (``the dark side''), which isphysically inequivalent to the region 0 <= theta <= pi/4 (``the light side'')in the presence of matter effects. The MSW solutions to the solar neutrinoproblem can extend to the dark side, especially if we take the conservativeattitude to allow higher confidence levels, ignore some of the experimentalresults in the fits, or relax theoretical predictions. Furthermore even theso-called ``vacuum oscillation'' solution distinguishes the dark and the lightsides. We urge experimental collaborations to present their results on theentire parameter space.

De Gouvêa, A; Murayama, H; Gouvea, Andre de; Friedland, Alexander; Murayama, Hitoshi

2000-01-01T23:59:59.000Z

160

Dark energy model with higher derivative of Hubble parameter  

E-Print Network (OSTI)

In this letter we consider a dark energy model in which the energy density is a function of the Hubble parameter $H$ and its derivative with respect to time $\\rho_{de}=3\\alpha \\ddot{H}H^{-1}+3\\beta\\dot{H}+3\\gamma H^2$. The behavior of the dark energy and the expansion history of the Universe depend heavily on the parameters of the model $\\alpha$, $\\beta$ and $\\gamma$. It is very interesting that the age problem of the well-known three old objects can be alleviated in this models.

Songbai Chen; Jiliang Jing

2009-04-20T23:59:59.000Z

Note: This page contains sample records for the topic "tox parameter tox" 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

Quantum parameter estimation using general single-mode Gaussian states  

E-Print Network (OSTI)

We calculate the quantum Cram\\'er--Rao bound for the sensitivity with which one or several parameters, encoded in a general single-mode Gaussian state, can be estimated. This includes in particular the interesting case of mixed Gaussian states. We apply the formula to the problems of estimating phase, purity, loss, amplitude, and squeezing. In the case of the simultaneous measurement of several parameters, we provide the full quantum Fisher information matrix. Our results unify previously known partial results, and constitute a complete solution to the problem of knowing the best possible sensitivity of measurements based on a single-mode Gaussian state.

Olivier Pinel; Pu Jian; Claude Fabre; Nicolas Treps; Daniel Braun

2013-06-19T23:59:59.000Z

162

Method of determining forest production from remotely sensed forest parameters  

DOE Patents (OSTI)

A method of determining forest production entirely from remotely sensed data in which remotely sensed multispectral scanner (MSS) data on forest 5 composition is combined with remotely sensed radar imaging data on forest stand biophysical parameters to provide a measure of forest production. A high correlation has been found to exist between the remotely sensed radar imaging data and on site measurements of biophysical 10 parameters such as stand height, diameter at breast height, total tree height, mean area per tree, and timber stand volume.

Corey, J.C.; Mackey, H.E. Jr.

1987-08-31T23:59:59.000Z

163

Angular momentum dependence of the nuclear level density parameter  

SciTech Connect

Dependence of nuclear level density parameter on the angular momentum and temperature is investigated in a theoretical framework using the statistical theory of hot rotating nuclei. The structural effects are incorporated by including shell correction, shape, and deformation. The nuclei around Zapprox =50 with an excitation energy range of 30 to 40 MeV are considered. The calculations are in good agreement with the experimentally deduced inverse level density parameter values especially for {sup 109}In, {sup 113}Sb, {sup 122}Te, {sup 123}I, and {sup 127}Cs nuclei.

Aggarwal, Mamta [UM-DAE Centre for Excellence in Basic Sciences, University of Mumbai-Kalina Campus, Mumbai 400 098 (India); Kailas, S. [Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085 (India)

2010-04-15T23:59:59.000Z

164

Bayesian parameter inference from continuously monitored quantum systems  

E-Print Network (OSTI)

We review the introduction of likelihood functions and Fisher information in classical estimation theory, and we show how they can be defined in a very similar manner within quantum measurement theory. We show that the stochastic master equations describing the dynamics of a quantum system subject to a definite set of measurements provides likelihood functions for unknown parameters in the system dynamics, and we show that the estimation error, given by the Fisher information, can be identified by stochastic master equation simulations. For large parameter spaces we describe and illustrate the efficient use of Markov Chain Monte Carlo sampling of the likelihood function.

Søren Gammelmark; Klaus Mølmer

2012-12-22T23:59:59.000Z

165

Parity Doubling and the S Parameter Below the Conformal Window  

E-Print Network (OSTI)

We describe a lattice simulation of the masses and decay constants of the lowest-lying vector and axial resonances, and the electroweak S parameter, in an SU(3) gauge theory with $N_f = 2$ and 6 fermions in the fundamental representation. The spectrum becomes more parity doubled and the S parameter per electroweak doublet decreases when $N_f$ is increased from 2 to 6, motivating study of these trends as $N_f$ is increased further, toward the critical value for transition from confinement to infrared conformality.

Thomas Appelquist; Ron Babich; Richard C. Brower; Michael Cheng; Michael A. Clark; Saul D. Cohen; George T. Fleming; Joe Kiskis; Meifeng Lin; Ethan T. Neil; James C. Osborn; Claudio Rebbi; David Schaich; Pavlos Vranas

2010-09-29T23:59:59.000Z

166

Thermophoresis and its thermal parameters for aerosol collection  

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

Thermophoresis and its thermal parameters for aerosol collection Thermophoresis and its thermal parameters for aerosol collection Title Thermophoresis and its thermal parameters for aerosol collection Publication Type Journal Article Year of Publication 2007 Authors Huang, Zhuo, Michael G. Apte, and Lara A. Gundel Journal U.S. Department of Energy Journal of Undergraduate Research Volume 7 Pagination 37-42 Abstract The particle collection effi ciency of a prototype environmental tobacco smoke (ETS) sampler based on the use of thermophoresis is determined by optimizing the operational voltage that determines its thermal gradient. This sampler's heating element was made of three sets of thermophoretic (TP) wires 25µm in diameter suspended across a channel cut in a printed circuit board and mounted with collection surfaces on both sides. The separation between the heating element and the room temperature collection surface was determined in a numerical simulation based on the Brock-Talbot model. Other thermal parameters of this TP ETS sampler were predicted by the Brock-Talbot model for TP deposition. From the normalized results the optimal collection ratio was expressed in terms of operational voltage and fi lter mass. Prior to the Brock-Talbot model simulation for this sampler, 1.0V was used arbitrarily. The operational voltage was raised

167

Long correlation Gaussian random fields: Parameter estimation and noise reduction  

Science Conference Proceedings (OSTI)

In this paper, a parametric model for Gaussian random fields (GRFs) with long-correlation feature, namely the long correlation GRF (LC-GRF), is studied. Important properties of the model are derived and used for developing new parameter estimation algorithms ... Keywords: Expectation--maximization (EM) algorithm, Gaussian random fields (GRF), Maximum likelihood estimation (MLE), Noise reduction, Wiener filter

C. F. Caiafa; A. N. Proto; E. E. Kuruo?lu

2007-07-01T23:59:59.000Z

168

Joint inversion of AVA data for elastic parameters by bootstrapping  

Science Conference Proceedings (OSTI)

A joint inversion method is developed to estimate the elastic constants of two elastic, homogeneous, isotropic media separated by a flat horizontal boundary. The method jointly uses P and S-converted wave reflection amplitude-versus-angle (AVA) data ... Keywords: AVA, Bootstrapping, Elastic parameters, Joint inversion, Zoeppritz equations

Hülya Kurt

2007-03-01T23:59:59.000Z

169

Consistency among speech parameter vectors: Application to predicting speech intelligibility  

Science Conference Proceedings (OSTI)

Previous researchers interested in physical assessment of speech intelligibility have largely based their predictions on preservation of spectral shape. A new approach is presented in which intelligibility is predicted to be preserved only if a transformation modifies relevant speech parameters in a consistent manner. In particular

Matthew H. Power; Louis D. Braida

1996-01-01T23:59:59.000Z

170

Deriving ionospheric system parameters from VLF transmitter signal analysis  

Science Conference Proceedings (OSTI)

The lower layers of the earths ionosphere are important for long range data transmission in the very low frequency range (VLF) and of general geophysical interest as X-ray and particle bursts of solar and other origin leave their fingerprints there. ... Keywords: ionosphere, optimization algorithms, signal processing, system parameter identification, wavelet and Fourier transforms

Ernst D. Schmitter

2008-07-01T23:59:59.000Z

171

Gravitational wave parameter estimation with compressed likelihood evaluations  

E-Print Network (OSTI)

One of the main bottlenecks in gravitational wave (GW) astronomy is the high cost of performing parameter estimation and GW searches on the fly. We propose a novel technique based on Reduced Order Quadratures (ROQs), an application and data-specific quadrature rule, to perform fast and accurate likelihood evaluations. These are the dominant cost in Markov chain Monte Carlo (MCMC) algorithms, which are widely employed in parameter estimation studies, and so ROQs offer a new way to accelerate GW parameter estimation. We illustrate our approach using a four dimensional GW burst model embedded in noise. We build an ROQ for this model, and perform four dimensional MCMC searches with both the standard and ROQs quadrature rules, showing that, for this model, the ROQ approach is around 25 times faster than the standard approach with essentially no loss of accuracy. The speed-up from using ROQs is expected to increase for more complex GW signal models and therefore has significant potential to accelerate parameter estimation of GW sources such as compact binary coalescences.

Priscilla Canizares; Scott E. Field; Jonathan R. Gair; Manuel Tiglio

2013-04-01T23:59:59.000Z

172

Using HYTECH to Synthesize Control Parameters for a Steam Boiler ?;??  

E-Print Network (OSTI)

Using HYTECH to Synthesize Control Parameters for a Steam Boiler ?;?? Thomas A. Henzinger 1 Howard model a steam­boiler control system using hybrid au­ tomata. We provide two abstracted linear models of the nonlinear be­ havior of the boiler. For each model, we define and verify a controller that maintains

Henzinger, Thomas A.

173

Using HYTECH to Synthesize Control Parameters for a Steam Boiler? ??  

E-Print Network (OSTI)

Using HYTECH to Synthesize Control Parameters for a Steam Boiler? ?? Thomas A. Henzinger1 Howard model a steam-boiler control system using hybrid au- tomata. We provide two abstracted linear models of the nonlinear be- havior of the boiler. For each model, we de ne and verify a controller that maintains the safe

Henzinger, Thomas A.

174

Range of Neutronic Parameters for Repository Criticality Analyses  

SciTech Connect

The ''Range of Neutronic Parameters for Repository Criticality Analyses'' technical report contains a summary of the benchmark criticality analyses (including the laboratory critical experiment [LCEs] and the commercial reactor criticals [CRCs]) used to support the validation of the criticality evaluation methods. This report also documents the development of the Critical Limits (CLs) for the repository criticality analyses.

W.J. Anderson

1999-09-28T23:59:59.000Z

175

Prediction of Critical Desalination Parameters Using Radial Basis Functions Networks  

Science Conference Proceedings (OSTI)

Prediction of critical desalination parameters (recovery and salt rejection) of two distinct processes based on real operational data is presented. The proposed method utilizes the radial basis function network using data clustering and histogram equalization. ... Keywords: neural network, radial basis, reverse osmosis

Mutaz M. Jafar; Ali Zilouchian

2002-06-01T23:59:59.000Z

176

Parameter sweeping methodology for integration in a workflow specification framework  

Science Conference Proceedings (OSTI)

This paper presents the design and the automation of a methodology (SciDC) for the creation, execution and administration of large computational and parametric experiments in distributed systems. This methodology is oriented to be a part of a workflow ... Keywords: computational models, distributed processing, parallel processing, parameter sweeping, workflow specification

David B. Cedrés; Emilio Hernández

2007-08-01T23:59:59.000Z

177

Genome parameters as information to forecast emergent developmental behaviors  

Science Conference Proceedings (OSTI)

In this paper we measure genomic properties in EvoDevo systems, to predict emergent phenotypic characteristic of artificial organisms. We describe and compare three parameters calculated out of the composition of the genome, to forecast the emergent ... Keywords: cellular computation, development, emergence, evolution, parameterization of rule spaces

Stefano Nichele; Gunnar Tufte

2012-09-01T23:59:59.000Z

178

Fired heater versus CCGT/cogeneration cycle parameters  

Science Conference Proceedings (OSTI)

Initial results are given of a newly designed coal-fired, closed-cycle gas turbine (CCGT) for a cogeneration plant. The coal burning heater is the most costly unit of such a system. The interrelationship between the technical and economic feasibility of the heater and turbine parameters are discussed. 7 refs.

Campbell, J. Jr.; Lee, J.C.

1982-01-01T23:59:59.000Z

179

UNCORRECTED 2 Simulation of robust resonance parameters using information theory  

E-Print Network (OSTI)

UNCORRECTED PROOF 1 2 Simulation of robust resonance parameters using information theory 3 P.T. Krishna Kumar a,*, V.V. Phoha b , S.S. Iyengar c 4 a Reactor Physics Division, Indira Gandhi Centre systematic errors in cross-section 13 measurement, correlation due to nuclear reaction formalism, etc. All

Phoha, Vir V.

180

Meteorological parameters effects on solar energy power generation  

Science Conference Proceedings (OSTI)

As Turkey lies near the sunny belt between 36 and 42°N latitudes, most of the locations in Turkey receive abundant solar energy. The yearly average solar radiation is 3.6 kWh/m2 day, and the total yearly radiation period is approximately ... Keywords: D.C. loads, electrical energy, energy consumption, meteorological parameters, photovoltaic system

?afak Sa?lam

2010-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "tox parameter tox" 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

Unsaturated hydraulic parameters determined from direct and indirect methods  

SciTech Connect

Hydraulic parameters are required for numerical simulations of unsaturated flow at Yucca Mountain, a vertically heterogeneous volcanic site for a potential high-level waste repository in the desert southwest. In this paper, direct measurements of the unsaturated hydraulic conductivity using a centrifuge with a specialized rotor are compared to those estimated using a predictive conductivity equation and two methods of measuring moisture retention.

Flint, Lorraine E.; Hudson, David B.; Flint, Alan L.

1997-10-22T23:59:59.000Z

182

Robust likelihood inference for regression parameters in partially linear models  

Science Conference Proceedings (OSTI)

A robust likelihood approach is proposed for inference about regression parameters in partially-linear models. More specifically, normality is adopted as the working model and is properly corrected to accomplish the objective. Knowledge about the true ... Keywords: Generalized additive models, Partially-linear models, Robust likelihood

Chung-Wei Shen; Tsung-Shan Tsou; N. Balakrishnan

2011-04-01T23:59:59.000Z

183

Fuzzy-wavelet based prediction of Earth rotation parameters  

Science Conference Proceedings (OSTI)

Prediction of Earth rotation parameters (ERPs) is of importance especially for near real-time applications including navigation, remote sensing, and hazard monitoring. Therefore, prediction of ERPs at least over a few days in the future is necessary. ... Keywords: Earth rotation, Fuzzy-inference systems, Prediction, Wavelet transform

O. Akyilmaz; H. Kutterer; C. K. Shum; T. Ayan

2011-01-01T23:59:59.000Z

184

Using circular programs to deforest in accumulating parameters  

Science Conference Proceedings (OSTI)

Functional languages allow a modular programming style by function composition, which however can lead to inefficient runtime behavior due to production and consumption of intermediate results.We present a new mechanizable transformation technique for ... Keywords: accumulating parameters, circular programs, deforestation, intermediate data structures, lazy composition, lazy evaluation, multiple traversals, program transformation, tupling

Janis Voigtländer

2002-09-01T23:59:59.000Z

185

Extraction of Mangrove Biophysical Parameters Using Airborne LiDAR  

E-Print Network (OSTI)

Abstract: Tree parameter determinations using airborne Light Detection and Ranging (LiDAR) have been conducted in many forest types, including coniferous, boreal, and deciduous. However, there are only a few scientific articles discussing the application of LiDAR to mangrove biophysical parameter extraction at an individual tree level. The main objective of this study was to investigate the potential of using LiDAR data to estimate the biophysical parameters of mangrove trees at an individual tree scale. The Variable Window Filtering (VWF) and Inverse Watershed Segmentation (IWS) methods were investigated by comparing their performance in individual tree detection and in deriving tree position, crown diameter, and tree height using the LiDAR-derived Canopy Height Model (CHM). The results demonstrated that each method performed well in mangrove forests with a low percentage of crown overlap conditions. The VWF method yielded a slightly higher accuracy for mangrove parameter extractions from LiDAR data compared with the IWS method. This is because the VWF method uses an adaptive circular filtering window size based on an allometric relationship. As a result of the VWF method, the position

Wasinee Wannasiri; Masahiko Nagai; Kiyoshi Honda; Phisan Santitamnont; Poonsak Miphokasap

2013-01-01T23:59:59.000Z

186

Characteristics of Distributed-Parameter Systems: Handbook of Equations of Mathematical Physics and Distributed-Parameter Systems  

Science Conference Proceedings (OSTI)

From the Publisher:This volume is intended to serve as a handbook which contains data dealing with the characteristics of systems with distributed and lumped parameters. Some two hundred problems are discussed and, for each problem, all the main characteristics ...

A. G. Butkovskiµi; Leonid Moiseevich. Pustylºnikov

1993-10-01T23:59:59.000Z

187

Study of some parameters interstellar transport using of magnetic umbrella  

E-Print Network (OSTI)

Interstellar transport is an object of interest in many sci-fi stories. In history a lot of sci-fi predictions have turned into reality, such as communications satellites, deep-sea submarines and journies to the moon. In this work we study some physical parameters of a space ship which uses a magnetic umbrella. Our spaceship generates a magnetic field in its neighborhood and captures charged protons into a magnetic trap. These particles are taken into a fusion reactor. The obtained energy and waste in form of helium are used as a fuel in an ion engine. With the help of elementary physics we can work out the basic physical parameters of the ship, e.g. maximal velocity, acceleration of the ship or acceleration time period.

Martin ?ermák

2013-01-28T23:59:59.000Z

188

Computational Procedures for Determining Parameters in Ramberg-Osgood  

Office of Scientific and Technical Information (OSTI)

Computational Procedures for Determining Parameters in Ramberg-Osgood Computational Procedures for Determining Parameters in Ramberg-Osgood Elastoplastic Model Based on Modulus and Damping Versus Strain Tzou-Shin Ueng Jian-Chu Chen July, 1992 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency Thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or

189

ET Parameters for Mixed-Valence Ru Complexes  

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

Convergence of Spectroscopic and Kinetic Electron Transfer Parameters for Convergence of Spectroscopic and Kinetic Electron Transfer Parameters for Mixed-Valence Binuclear Dipyridylamide Ruthenium Ammine Complexes Alison J. Distefano, James F. Wishart, and Stephan S. Isied Coord. Chem. Rev. 249, 507-516 (2005). [Find paper at Elsevier Science Direct] Abstract: A series of binuclear ruthenium(II,III) pentaammine complexes bridged by 4-pyridyl isonicotinamide (iso-apy) and methyl, 4-pyridyl isonicotinamide (iso-mapy), and their mononuclear congeners, were studied by spectroscopic and kinetic techniques. The amide functionality provides asymmetry between the electronic environments of the metal ions bound to the aminopyridine (apy) and pyridine carbonyl (iso) ends. The resulting difference is observed in the charge transfer spectra and the

190

Order parameter prediction from molecular dynamics simulations in proteins  

E-Print Network (OSTI)

A molecular understanding of how protein function is related to protein structure will require an ability to understand large conformational changes between multiple states. Unfortunately these states are often separated by high free energy barriers and within a complex energy landscape. This makes it very difficult to reliably connect, for example by all-atom molecular dynamics calculations, the states, their energies and the pathways between them. A major issue needed to improve sampling on the intermediate states is an order parameter -- a reduced descriptor for the major subset of degrees of freedom -- that can be used to aid sampling for the large conformational change. We present a novel way to combine information from molecular dynamics using non-linear time series and dimensionality reduction, in order to quantitatively determine an order parameter connecting two large-scale conformationally distinct protein states. This new method suggests an implementation for molecular dynamics calculations that ma...

Perilla, Juan R

2011-01-01T23:59:59.000Z

191

Agricultural and Environmental Input Parameters for the Biosphere Model  

SciTech Connect

This analysis is one of 10 technical reports that support the Environmental Radiation Model for Yucca Mountain Nevada (ERMYN) (i.e., the biosphere model). It documents development of agricultural and environmental input parameters for the biosphere model, and supports the use of the model to develop biosphere dose conversion factors (BDCFs). The biosphere model is one of a series of process models supporting the total system performance assessment (TSPA) for the repository at Yucca Mountain. The ERMYN provides the TSPA with the capability to perform dose assessments. A graphical representation of the documentation hierarchy for the ERMYN is presented in Figure 1-1. This figure shows the interrelationships between the major activities and their products (the analysis and model reports) that were planned in ''Technical Work Plan for Biosphere Modeling and Expert Support'' (BSC 2004 [DIRS 169573]). The ''Biosphere Model Report'' (BSC 2004 [DIRS 169460]) describes the ERMYN and its input parameters.

K. Rasmuson; K. Rautenstrauch

2004-09-14T23:59:59.000Z

192

Nuclear Criticality Technology and Safety Project parameter study database  

SciTech Connect

A computerized, knowledge-screened, comprehensive database of the nuclear criticality safety documentation has been assembled as part of the Nuclear Criticality Technology and Safety (NCTS) Project. The database is focused on nuclear criticality parameter studies. The database has been computerized using dBASE III Plus and can be used on a personal computer or a workstation. More than 1300 documents have been reviewed by nuclear criticality specialists over the last 5 years to produce over 800 database entries. Nuclear criticality specialists will be able to access the database and retrieve information about topical parameter studies, authors, and chronology. The database places the accumulated knowledge in the nuclear criticality area over the last 50 years at the fingertips of a criticality analyst.

Toffer, H.; Erickson, D.G.; Samuel, T.J. [Westinghouse Hanford Co., Richland, WA (United States); Pearson, J.S. [Lawrence Livermore National Lab., CA (United States)

1993-03-01T23:59:59.000Z

193

Performance and safety parameters for the high flux isotope reactor  

Science Conference Proceedings (OSTI)

A Monte Carlo depletion model for the High Flux Isotope Reactor (HFIR) Cycle 400 and its use in calculating parameters of relevance to the reactor performance and safety during the reactor cycle are presented in this paper. This depletion model was developed to serve as a reference for the design of a low-enriched uranium (LEU) fuel for an ongoing study to convert HFIR from high-enriched uranium (HEU) to LEU fuel; both HEU and LEU depletion models use the same methodology and ENDF/B-VII nuclear data as discussed in this paper. The calculated HFIR Cycle 400 parameters, which are compared with measurement data from critical experiments performed at HFIR, data included in the HFIR Safety Analysis Report (SAR), or data reported by previous calculations, provide a basis for verification or updating of the corresponding SAR data. (authors)

Ilas, G. [Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN 37831-6172 (United States); Primm III, T. [Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN 37831-6172 (United States); Primm Consulting, LLC, 945 Laurel Hill Road, Knoxville, TN 37923 (United States)

2012-07-01T23:59:59.000Z

194

Bayesian estimation of one-parameter qubit gates  

E-Print Network (OSTI)

We address estimation of one-parameter unitary gates for qubit systems and seek for optimal probes and measurements. Single- and two-qubit probes are analyzed in details focusing on precision and stability of the estimation procedure. Bayesian inference is employed and compared with the ultimate quantum limits to precision, taking into account the biased nature of Bayes estimator in the non asymptotic regime. Besides, through the evaluation of the asymptotic a posteriori distribution for the gate parameter and the comparison with the results of Monte Carlo simulated experiments, we show that asymptotic optimality of Bayes estimator is actually achieved after a limited number of runs. The robustness of the estimation procedure against fluctuations of the measurement settings is investigated and the use of entanglement to improve the overall stability of the estimation scheme is also analyzed in some details.

Berihu Teklu; Stefano Olivares; Matteo G A Paris

2008-12-04T23:59:59.000Z

195

Frequency tracking and parameter estimation for robust quantum state estimation  

SciTech Connect

In this paper we consider the problem of tracking the state of a quantum system via a continuous weak measurement. If the system Hamiltonian is known precisely, this merely requires integrating the appropriate stochastic master equation. However, even a small error in the assumed Hamiltonian can render this approach useless. The natural answer to this problem is to include the parameters of the Hamiltonian as part of the estimation problem, and the full Bayesian solution to this task provides a state estimate that is robust against uncertainties. However, this approach requires considerable computational overhead. Here we consider a single qubit in which the Hamiltonian contains a single unknown parameter. We show that classical frequency estimation techniques greatly reduce the computational overhead associated with Bayesian estimation and provide accurate estimates for the qubit frequency.

Ralph, Jason F. [Department of Electrical Engineering and Electronics, University of Liverpool, Brownlow Hill, Liverpool L69 3GJ (United Kingdom); Jacobs, Kurt [Department of Physics, University of Massachusetts at Boston, 100 Morrissey Blvd, Boston, Massachusetts 02125 (United States); Hill, Charles D. [Centre for Quantum Computation and Communication Technology, School of Physics, University of Melbourne, Victoria 3010 (Australia)

2011-11-15T23:59:59.000Z

196

Performance and Safety Parameters for the High Flux Isotope Reactor  

SciTech Connect

A Monte Carlo depletion model for the High Flux Isotope Reactor (HFIR) Cycle 400 and its use in calculating parameters of relevance to the reactor performance and safety during the reactor cycle are presented in this paper. This depletion model was developed to serve as a reference for the design of a low-enriched uranium (LEU) fuel for an ongoing study to convert HFIR from high-enriched uranium (HEU) to LEU fuel; both HEU and LEU depletion models use the same methodology and ENDV/B-VII nuclear data as discussed in this paper. The calculated HFIR Cycle 400 parameters, which are compared when available with measurement data from critical experiments performed at HFIR, data included in the HFIR Safety Analysis Report (SAR), or data reported by previous calculations, provide a basis for verification or updating of the corresponding SAR data.

Ilas, Germina [ORNL; Primm, Trent [Primm Consulting, LLC

2012-01-01T23:59:59.000Z

197

Back analysis of microplane model parameters using soft computing methods  

E-Print Network (OSTI)

A new procedure based on layered feed-forward neural networks for the microplane material model parameters identification is proposed in the present paper. Novelties are usage of the Latin Hypercube Sampling method for the generation of training sets, a systematic employment of stochastic sensitivity analysis and a genetic algorithm-based training of a neural network by an evolutionary algorithm. Advantages and disadvantages of this approach together with possible extensions are thoroughly discussed and analyzed.

Kucerova, A; Zeman, J

2009-01-01T23:59:59.000Z

198

Guide for Selection of Overhead Line Components and Design Parameters  

Science Conference Proceedings (OSTI)

This report outlines the contents for the Electric Power Research Institute (EPRI) report Guide for Selection of Overhead Line Components and Design Parameters that is to be developed under the Design and Construction—Approach and Practice project. It identifies the topics to be covered and the scope to be developed for each topic. New topics will be added to the list whenever such needs arise. Detailed information suitable for use in the design of overhead lines on a few topics will be ...

2012-12-31T23:59:59.000Z

199

Seasonal variations of grounding parameters by field tests  

SciTech Connect

The past fifteen years have seen considerable research in the area of substation grounding design, analysis and testing. These research include the revision of the IEEE Std.-80, the development of PC based computer programs, the in depth analysis of grounding parameters and the development of new field testing methods and devices. In spite of these advances, several questions were often asked, primarily due to safety concerns. The questions were related to the seasonal variation of critical grounding parameters such as the soil and gravel resistivities and their influence on the body current in an accidental circuit. There was also a need to study the total behavior of a substation ground grid with respect to different weather conditions by performing field tests. In response to the above needs, a comprehensive field test program was developed and implemented. The field test consisted of flowing approximately 150 amperes through the Texas Valley ground grid from a remote substation. The parameters investigated in this project were the grid impedance, the grid potential rise (GPR) , the fault current distribution, the touch/step voltages, the body current on different gravel beds and the soil/gravel resistivities. The measurements were performed in the rainy, winter and summer weather conditions during 1989--1990. The field test results, overall, indicate that the rainy weather is the worst condition for the substation safety because of the substantial reduction in the protective characteristics of the gravel. Among the gravel types, the washed gravel has much superior protective characteristics compared to the crusher run type of gravel. A comparison of SGSYS computed grounding parameters with measured results indicates that the grid resistance and GPR compare well but the computed touch voltage and body current are substantially higher than the measured values.

Patel, S.G. (Georgia Power Co., Forest Park, GA (United States). Research Center)

1992-07-01T23:59:59.000Z

200

On optimization of sub-THz gyrotron parameters  

SciTech Connect

The theory is developed describing how the optimization of gyrotron parameters should be done taking into account two effects deteriorating the gyrotron efficiency: the spread in electron velocities and the spread in the guiding center radii. The paper starts from qualitative analysis of the problem. This simplified theory is used for making some estimates for a specific gyrotron design. The same design is then studied by using more accurate numerical methods. Results of the latter treatment agree with former qualitative predictions.

Dumbrajs, O. [Institute of Solid State Physics, University of Latvia, Kengaraga Street 8, LV-1063 Riga (Latvia); Nusinovich, G. S. [Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742-3511 (United States)

2012-10-15T23:59:59.000Z

Note: This page contains sample records for the topic "tox parameter tox" 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

Wide parameter search for isolated pulsars using the Hough transform  

E-Print Network (OSTI)

We use the Hough transform to analyze data from the second science run of the LIGO interferometers, to look for gravitational waves from isolated pulsars. We search over the whole sky and over a large range of frequencies and spin-down parameters. Our search method is based on the Hough transform, which is a semi-coherent, computationally efficient, and robust pattern recognition technique. We also present a validation of the search pipeline using hardware signal injections.

Badri Krishnan

2005-06-22T23:59:59.000Z

202

EPRI-SQUG Damage-Indicating Parameter Information  

Science Conference Proceedings (OSTI)

This report provides information assembled for the purpose of developing damage-indicating parameters (DIPs) for power plant equipment. An existing Electric Power Research Institute (EPRI) seismic experience database is used to develop candidate DIP values associated with two database sites subjected to earthquake events. The two sites are described, the candidate DIPs are derived from the recorded site motions, and the equipment items at these sites are categorized according to performance during an ear...

2011-09-13T23:59:59.000Z

203

Parameter identification using experimental nonlinear dynamics and chaos  

E-Print Network (OSTI)

Parameter identification using experimental nonlinear dynamics and chaos was applied to a piecewise-linear oscillator; application to cracked beams was attempted. Electronic integration circuitry was constructed to provide velocity and displacement data from accelerometer signals mounted on the test specimens. Data acquisition software samples velocity and displacement signals and displays a phase portrait or Poincare map on a computer screen. Experimental data show the chaotic nature of the piecewise- linear system through a phase portrait, Poincare map, frequency spectrum, and bifurcation diagram. Unstable periodic orbits were extracted from each chaotic time series obtained from the system configured with six different parameter values. The movement of the unstable periodic orbits in phase space is used to identify parameter changes in the system. Cracked beams were created by initiating fatigue cracks in aluminum beams. Several attempts to force the beams into chaos revealed how a crack half-way through a beam results in a weakly nonlinear system; such systems rarely display chaos. Recommendations on how to force a cracked beam into chaos are given.

Chancellor, Roy Scott

1993-01-01T23:59:59.000Z

204

Effect of Yttria Content on the Zirconia Unit Cell Parameters  

SciTech Connect

The relationship between yttria concentration and the unit cell parameters in partially and fully stabilized zirconia has been reassessed, motivated by the need to improve the accuracy of phase analysis upon decomposition of t{prime}-based thermal barrier coatings. Compositions ranging from 6 to 18 mol% YO{sub 1.5} were synthesized and examined by means of high-resolution X-ray diffraction. Lattice parameters were determined using the Rietveld refinement method, a whole-pattern fitting procedure. The revised empirical relationships fall within the range of those published previously. However, efforts to achieve superior homogeneity of the materials, as well as accuracy of the composition and lattice parameters, provide increased confidence in the reliability of these correlations for use in future studies. Additional insight into the potential sources for scatter previously reported for the transition region ({approx}12-14 mol% YO{sub 1.5}), where tetragonal and cubic phases have been observed to coexist, is also provided. Implications on the current understanding of stabilization mechanisms in zirconia are discussed.

Krogstad, Jessica A.; Lepple, Maren; Gao, Yan; Lipkin, Don M.; Levi, Carlos G. (UCSB); (GE Global)

2012-02-06T23:59:59.000Z

205

THE LUMINOSITY PROFILE AND STRUCTURAL PARAMETERS OF THE ANDROMEDA GALAXY  

Science Conference Proceedings (OSTI)

We have constructed an extended composite luminosity profile for the Andromeda galaxy, M31, and have decomposed it into three basic luminous structural components: a bulge, a disk, and a halo. The dust-free Spitzer/Infrared Array Camera (IRAC) imaging and extended spatial coverage of ground-based optical imaging and deep star counts allow us to map M31's structure from its center to 22 kpc along the major axis. We apply, and address the limitations of, different decomposition methods for the one-dimensional luminosity profiles and two-dimensional images. These methods include nonlinear least-squares and Bayesian Monte Carlo Markov chain analyses. The basic photometric model for M31 has a Sersic bulge with shape index n {approx_equal} 2.2 {+-} .3 and effective radius R{sub e} = 1.0 {+-} 0.2 kpc, and a dust-free exponential disk of scale length R{sub d} = 5.3 {+-} .5 kpc; the parameter errors reflect the range between different decomposition methods. Despite model covariances, the convergence of solutions based on different methods and current data suggests a stable set of structural parameters. The ellipticities ({epsilon} = 1 - b/a) of the bulge and the disk from the IRAC image are 0.37 {+-} 0.03 and 0.73 {+-} 0.03, respectively. The bulge parameter n is rather insensitive to bandpass effects and its value (2.2) suggests a first rapid formation via mergers followed by secular growth from the disk. The M31 halo has a two-dimensional power-law index {approx_equal} - 2.5 {+-} 0.2 (or -3.5 in three-dimensional), comparable to that of the Milky Way. We find that the M31 bulge light is mostly dominant over the range R{sub min} {approx} 9 kpc. The stellar nucleus, bulge, disk, and halo components each contribute roughly 0.05%, 23%, 73%, and 4% of the total light of M31 out to 200 kpc along the minor axis. Nominal errors for the structural parameters of the M31 bulge, disk, and halo amount to 20%. If M31 and the Milky Way are at all typical, faint stellar halos should be routinely detected in galaxy surveys reaching below {mu}{sub i} {approx_equal} 27 mag arcsec{sup -2}. We stress that our results rely on this photometric analysis alone. Structural parameters may change when other fundamental constraints, such as those provided by abundance gradients and stellar kinematics, are considered simultaneously.

Courteau, Stephane; Widrow, Lawrence M. [Department of Physics, Engineering Physics and Astronomy, Queen's University, Kingston, Ontario (Canada); McDonald, Michael [Kavli Institute for Astrophysics and Space Research, MIT, Cambridge, MA (United States); Guhathakurta, Puragra [UCO/Lick Observatory and Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA (United States); Gilbert, Karoline M. [Department of Astronomy, University of Washington, Seattle, WA (United States); Zhu Yucong [Harvard/Center for Astrophysics, Cambridge, MA (United States); Beaton, Rachael Lynn; Majewski, Steven R., E-mail: courteau@astro.queensu.ca, E-mail: widrow@astro.queensu.ca, E-mail: mcdonald@space.mit.edu, E-mail: raja@ucolick.org, E-mail: kgilbert@astro.washington.edu, E-mail: yzhu@cfa.harvard.edu, E-mail: rlb9n@mail.astro.virginia.edu, E-mail: srm4n@virginia.edu [Department of Astronomy, University of Virginia, Charlottesville, VA (United States)

2011-09-20T23:59:59.000Z

206

Indecomposability parameters in chiral Logarithmic Conformal Field Theory  

E-Print Network (OSTI)

Work of the last few years has shown that the key algebraic features of Logarithmic Conformal Field Theories (LCFTs) are already present in some finite lattice systems (such as the XXZ spin-1/2 chain) before the continuum limit is taken. This has provided a very convenient way to analyze the structure of indecomposable Virasoro modules and to obtain fusion rules for a variety of models such as (boundary) percolation etc. LCFTs allow for additional quantum numbers describing the fine structure of the indecomposable modules, and generalizing the `b-number' introduced initially by Gurarie for the c=0 case. The determination of these indecomposability parameters has given rise to a lot of algebraic work, but their physical meaning has remained somewhat elusive. In a recent paper, a way to measure b for boundary percolation and polymers was proposed. We generalize this work here by devising a general strategy to compute matrix elements of Virasoro generators from the numerical analysis of lattice models and their continuum limit. The method is applied to XXZ spin-1/2 and spin-1 chains with open (free) boundary conditions. They are related to gl(n+m|m) and osp(n+2m|2m)-invariant superspin chains and to nonlinear sigma models with supercoset target spaces. These models can also be formulated in terms of dense and dilute loop gas. We check the method in many cases where the results were already known analytically. Furthermore, we also confront our findings with a construction generalizing Gurarie's, where logarithms emerge naturally in operator product expansions to compensate for apparently divergent terms. This argument actually allows us to compute indecomposability parameters in any logarithmic theory. A central result of our study is the construction of a Kac table for the indecomposability parameters of the logarithmic minimal models LM(1,p) and LM(p,p+1).

Romain Vasseur; Jesper Lykke Jacobsen; Hubert Saleur

2011-03-16T23:59:59.000Z

207

The effect of load parameters on system thermal performance  

SciTech Connect

The effects of load size, load profile and hot water set temperature on system thermal performance are investigated in order to determine the relative importance of these design parameters in sizing a solar water heating system. The WATSUN IV computer program was used to introduce various load sizes, load profiles and set temperatures to a base model. The results indicate that variations in load size have a significant effect on the thermal performance of the system. However, variations in load profile and hot water set temperature seem to have no significant effect on system performance.

Vakili, M.

1984-02-01T23:59:59.000Z

208

Lumped-parameter fuel rod model for rapid thermal transients  

SciTech Connect

The thermal behavior of fuel rods during simulated accident conditions is extremely sensitive to the heat transfer coefficient which is, in turn, very sensitive to the cladding surface temperature and the fluid conditions. The development of a semianalytical, lumped-parameter fuel rod model which is intended to provide accurate calculations, in a minimum amount of computer time, of the thermal response of fuel rods during a simulated loss-of-coolant accident is described. The results show good agreement with calculations from a comprehensive fuel-rod code (FRAP-T) currently in use at Aerojet Nuclear Company. (auth)

Perkins, K.R.; Ramshaw, J.D.

1975-07-01T23:59:59.000Z

209

Liquid-fluidized-bed heat exchanger design parameters  

SciTech Connect

Liquid-fluidized-bed heat exchangers prevent scale accumulation on heat transfer surfaces and reduce the required heat transfer surface when scaling fluids, such as geothermal water, are used as the primary or working fluid. Liquid-fluidized-bed heat exchangers, principles of operation, and design parameters are described. Horizontal and vertical assemblies are discussed, including problems encountered with both designs. Bed-side heat transfer coefficients are given for limited cases, and a correlation is provided for calculating heat transfer coefficients for horizontal assemblies. A design example for a 60 kW/sub (e)/ (60 kW/sub (electric)/ preheater is included.

Allen, C.A.; Grimmett, E.S.

1978-04-01T23:59:59.000Z

210

Gravity, energy conservation and parameter values in collapse models  

E-Print Network (OSTI)

We interpret the probability rule of the CSL collapse theory to mean that the scalar field which causes collapse is the grvitational curvature scalar with two sources, the expectation value of the mass density and a white noise fluctuating source. We examine two models of the fluctuating source, monopole fluctuations and dipole fluctuations, and show that these correspond to two well known collapse models. We relate the two GRW parameters of CSL to fundamental constants, and explain the energy increase as arising from the loss of vacuum gravitational energy. It is shown how a problem with semi-classical grvity may be cured when it is combined with a CSL collapse model.

Philip Pearle; Euan Squires

1995-03-27T23:59:59.000Z

211

Binding Parameters of Alkaloids Berberine and Sanguinarine with DNA  

E-Print Network (OSTI)

We study the interaction of berberine and sanguinarine (plant alkaloids) with DNA in aqueous solutions, by using optical spectroscopy methods (absorption and fluorescence). The dependencies of alkaloid spectral characteristics on the concentration ratio N/c between the DNA base pairs and alkaloid molecules in the solutions are considered, and the manifestations of the alkaloid-DNA binding are revealed. The character of binding is found to depend on N/c. The parameters of the binding of berberine and sanguinarine with DNA are determined, by using the modified Scatchard and McGhee-von Hippel equations

Gumenyuk, V G; Kutovyy, S Yu; Yashchuk, V M; Zaika, L A

2012-01-01T23:59:59.000Z

212

Outdoor PV Module Degradation of Current-Voltage Parameters: Preprint  

DOE Green Energy (OSTI)

Photovoltaic (PV) module degradation rate analysis quantifies the loss of PV power output over time and is useful for estimating the impact of degradation on the cost of energy. An understanding of the degradation of all current-voltage (I-V) parameters helps to determine the cause of the degradation and also gives useful information for the design of the system. This study reports on data collected from 12 distinct mono- and poly-crystalline modules deployed at the National Renewable Energy Laboratory (NREL) in Golden, Colorado. Most modules investigated showed < 0.5%/year decrease in maximum power due to short-circuit current decline.

Smith, R. M.; Jordan, D. C.; Kurtz, S. R.

2012-04-01T23:59:59.000Z

213

Parameter estimation using NOON states over a relativistic quantum channel  

E-Print Network (OSTI)

We study the effect of the acceleration of the observer on a parameter estimation protocol using NOON states. An inertial observer, Alice, prepares a NOON state in Unruh modes of the quantum field, and sends it to an accelerated observer, Rob. We calculate the quantum Fisher information of the state received by Rob. We find the counter-intuitive result that the single rail encoding outperforms the dual rail. The NOON states have an optimal $N$ for the maximum information extractable by Rob, given his acceleration. This optimal $N$ decreases with increasing acceleration.

Dominic Hosler; Pieter Kok

2013-06-13T23:59:59.000Z

214

A Study on Design Parameters of Stirling Engines for Buildings  

E-Print Network (OSTI)

One of the most promising projects in the application of combined heat and power(CHP) lies in energy production for buildings. Stirling engines are very applicable to residential buildings, especially because of the higher electricity/heat efficiency. A literature review on stirling engines is first provided and a number of research works on the development and applications of Stirling engines are discussed. Then according to buildings' energy consumption, relevant output of power density of Stirling engines is estimated. From the results, the design parameters of Stirling engines are derived and the temperature difference on frequency and performance of Stirling engines is also discussed.

Ding, G.; Huang, S.; Zhang, C.; Hu, X.; Zhang, X.

2006-01-01T23:59:59.000Z

215

Finding New Thermoelectric Compounds Using Crystallographic Data: Atomic Displacement Parameters  

DOE Green Energy (OSTI)

A new structure-property relationship is discussed which links atomic displacement parameters (ADPs) and the lattice thermal conductivity of clathrate-like compounds. For many clathrate-like compounds, in which one of the atom types is weakly bound and ''rattles'' within its atomic cage, room temperature ADP information can be used to estimate the room temperature lattice thermal conductivity, the vibration frequency of the ''rattler'', and the temperature dependence of the heat capacity. Neutron data and X-ray crystallography data, reported in the literature, are used to apply this analysis to several promising classes of thermoelectric materials.

Chakoumakos, B.C.; Mandrus, D.G.; Sales, B.C.; Sharp, J.W.

1999-08-29T23:59:59.000Z

216

Bayesian estimation of pulsar parameters from gravitational wave data  

E-Print Network (OSTI)

We present a method of searching for, and parameterizing, signals from known radio pulsars in data from interferometric gravitational wave detectors. This method has been applied to data from the LIGO and GEO 600 detectors to set upper limits on the gravitational wave emission from several radio pulsars. Here we discuss the nature of the signal and the performance of the technique on simulated data. We show how to perform a coherent multiple detector analysis and give some insight in the covariance between the signal parameters.

Réjean J. Dupuis; Graham Woan

2005-08-23T23:59:59.000Z

217

Deconvolution of mixed gamma emitters using peak parameters  

SciTech Connect

When evaluating samples containing mixtures of nuclides using gamma spectroscopy the situation sometimes arises where the nuclides present have photon emissions that cannot be resolved by the detector. An example of this is mixtures of {sup 241}Am and plutonium that have L x-ray emissions with slightly different energies which cannot be resolved using a high-purity germanium detector. It is possible to deconvolute the americium L x-rays from those plutonium based on the {sup 241}Am 59.54 keV photon. However, this requires accurate knowledge of the relative emission yields. Also, it often results in high uncertainties in the plutonium activity estimate due to the americium yields being approximately an order of magnitude greater than those for plutonium. In this work, an alternative method of determining the relative fraction of plutonium in mixtures of {sup 241}Am and {sup 239}Pu based on L x-ray peak location and shape parameters is investigated. The sensitivity and accuracy of the peak parameter method is compared to that for conventional peak decovolution.

Gadd, Milan S [Los Alamos National Laboratory; Garcia, Francisco [Los Alamos National Laboratory; Magadalena, Vigil M [Los Alamos National Laboratory

2011-01-14T23:59:59.000Z

218

Effects of e-beam parameters on coherent electron cooling  

Science Conference Proceedings (OSTI)

Coherent Electron Cooling (CeC) requires detailed control of the phase between the hadron an the FEL-amplified wave packet. This phase depends on local electron beam parameters such as the energy spread and the peak current. In this paper, we examine the effects of local density variations on the cooling rates for CeC. Coherent Electron Cooling (CeC) [1] is a new concept in intense, high energy hadron beamcooling, in which the Debye screened charge perturbation calculated in [2] is used to seed a high-gain free electron laser (FEL). Using delays to give the perturbing hadron an energy-dependent longitudinal displacement relative to its frequencymodulated charge perturbation, the hadron receives an energy-dependent kick which reduces its energy variation from the design energy. The equations of motion in [1] assume that the electron bunch is the same physical size as the hadron bunch, and has a homogeneous charge density across the entire bunch. In practice, the electron bunches will be much shorter than the hadron bunch, and this local spacial inhomogeneity in the charge distribution will alter the gain length of the FEL, resulting in both a change in the amplification of the initial signal and a phase shift. In this paper we consider these inhomogeneity effects, determining cooling equations for bunched beam CeC consistent with these effects and determining thresholds for the cooling parameters.

Webb, S.D.; Litvinenko, V.N.; Wang, G.

2011-03-28T23:59:59.000Z

219

Microcomputer aided calculations of parameters for spray dryer operation  

SciTech Connect

This paper provides a series of practical microcomputer programs that can be used as a tool by engineers and researchers working with spray dryers for combustion process effluent control. The microcomputer programs calculate flue gas composition (CO/sub 2/, N/sub 2/, O/sub 2/, H/sub 2/O, and SO/sub 2/) from the composition of the fuel. The residence time of the flue gas in a spray dryer can be estimated, and using values provided by the user for the flow of water and absorbent slurry in the spray dryer, the program recalculates the flue gas composition and heat capacity at the exit of the spray dryer without accounting for any SO/sub 2/ removal that could occur in the spray dryer. From these values and the system pressure, the dew point and flue gas temperature at the spray dryer exit are calculated, providing the approach to saturation resulting from this choice of operating parameters. This computer code would enable a process engineer to quickly evaluate effects of important process parameters, such as flue gas temperature at the inlet to the spray dryer, atomizer water feed rate, and absorbent slurry concentration and feed rate, on the operation of a spray dryer.

Yeh, J.T.; Gyorke, D.F.; Pennline, H.W.; Drummond, C.J.

1985-01-01T23:59:59.000Z

220

Monte Carlo parameter studies and uncertainty analyses with MCNP5  

SciTech Connect

A software tool called mcnp-pstudy has been developed to automate the setup, execution, and collection of results from a series of MCNPS Monte Carlo calculations. This tool provides a convenient means of performing parameter studies, total uncertainty analyses, parallel job execution on clusters, stochastic geometry modeling, and other types of calculations where a series of MCNPS jobs must be performed with varying problem input specifications. Monte Carlo codes are being used for a wide variety of applications today due to their accurate physical modeling and the speed of today's computers. In most applications for design work, experiment analysis, and benchmark calculations, it is common to run many calculations, not just one, to examine the effects of design tolerances, experimental uncertainties, or variations in modeling features. We have developed a software tool for use with MCNP5 to automate this process. The tool, mcnp-pstudy, is used to automate the operations of preparing a series of MCNP5 input files, running the calculations, and collecting the results. Using this tool, parameter studies, total uncertainty analyses, or repeated (possibly parallel) calculations with MCNP5 can be performed easily. Essentially no extra user setup time is required beyond that of preparing a single MCNP5 input file.

Brown, F. B. (Forrest B.); Sweezy, J. E. (Jeremy E.); Hayes, R. B. (Robert B.)

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tox parameter tox" 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

Dimensionless parameters, scaling laws, and the implications for ETG  

SciTech Connect

ETG will be useful in resolving several physical issues relevant to Spherical Tokamak Reactor concepts. First, it will provide a test of whether transport is Bohm or gyro-Bohm in nature. The second point is that ETG will operate in a completely different range of {rho}* space from other high performance machines, opening up a previously inaccessible region of parameter space. ETG is also a (very) high-{beta} machine. It would be the only device that would have all of its parameters except {rho}* similar to those of a Spherical tokamak Reactor. If it turns out that the transport scales definitively as either Bohm or gyro-Bohm, then extrapolation to reactor conditions with significantly lower values of {rho}* would become more credible. It is also shown that in general one cannot obtain a power law relation in the dimensionless variables for the confinement tim from a power law fit to the engineering variables. It is shown, however, that if T{sub i}/T{sub e} and n{sub i}/n{sub e} are constant or if a modified definition of certain dimensionless variables is adopted, then such a power law conversion is possible.

Castle, G.G.

1995-04-20T23:59:59.000Z

222

Geometry and parameter optimization of PETRA undulator beamline slits  

SciTech Connect

The undulator beamline at the storage ring PETRA of the Hamburger Synchrotronstrahlungslabor HASYLAB delivers hard x-ray photons usable up to 300 keV. The total power of the beam is now up to 7.5 kW with closed gap and 60 mA stored particle beam. After a planned upgrade of the undulator, the power can increase to about 15 kW. The vertical white beam slit for the PETRA undulator beamline is located at about 105 m from the source. The worst case for the slit is when all the power is absorbed in one part of the slit system, which the slits must survive. This paper presents the results from parameter optimization in the worst case. The goal of the optimization is to minimize the maximum temperature of the slits. The geometrical parameters are the cooling hole size, its location from the surface, and the distance between holes. The worst case is found by moving the x-ray beam to all the possible locations. The maximum temperature of an optimized slit that has a two degree angle with the beam is about 192 degrees Celsius. The corresponding thermal stress in the slit is very low. The analysis assumptions, modeling, results, discussion, and conclusion will be given in the paper. 5 refs., 4 figs.

Wang, Z. [Argonne National Lab., IL (United States); Hahn, U. [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Hamburger Synchrotronstrahlungslabor

1996-08-01T23:59:59.000Z

223

Arecibo Technical & Operations Memo ATOMS 2000-03 MAIN BEAM AND FIRST SIDELOBE PARAMETERS FOR ARECIBO'S  

E-Print Network (OSTI)

4 describes observational results for the more esoteric main beam parameters ellipticity and coma. x

224

Dependence of the Photon Beam Characteristics on Electron Beam Parameters in Third Generation Synchrotron Light Sources  

E-Print Network (OSTI)

Dependence of the Photon Beam Characteristics on Electron Beam Parameters in Third Generation Synchrotron Light Sources

Ivanyan, M I; Tsakanov, V M

2002-01-01T23:59:59.000Z

225

Parameter sensitivity analysis of crop growth models based on the extended Fourier Amplitude Sensitivity Test method  

Science Conference Proceedings (OSTI)

Sensitivity analysis (SA) has become a basic tool for the understanding, application and development of models. However, in the past, little attention has been paid to the effects of the parameter sample size and parameter variation range on the parameter ... Keywords: Extended FAST, Multivariable output, Parameter variation range, Sample size, Time-dependent properties, WOFOST crop growth models

Jing Wang, Xin Li, Ling Lu, Feng Fang

2013-10-01T23:59:59.000Z

226

Performance Parameters for Grid-Connected PV Systems  

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

National Renewable Energy Laboratory National Renewable Energy Laboratory 1617 Cole Boulevard, Golden, Colorado 80401-3393 303-275-3000 * www.nrel.gov Operated for the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy by Midwest Research Institute * Battelle Contract No. DE-AC36-99-GO10337 B. Marion, J. Adelstein, and K. Boyle National Renewable Energy Laboratory H. Hayden, B. Hammond, T. Fletcher, B. Canada, and D. Narang Arizona Public Service Co. D. Shugar, H. Wenger, A. Kimber, and L. Mitchell PowerLight Corporation G. Rich and T. Townsend First Solar Prepared for the 31 st IEEE Photovoltaics Specialists Conference and Exhibition Lake Buena Vista, Florida January 3-7, 2005 February 2005 * NREL/CP-520-37358 Performance Parameters for Grid-Connected PV Systems

227

SNS Parameters List - SNS 100000000-PL0001-R13  

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

5 5 SNS 100000000-PL0001-R13 SNS Parameters List This report was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States government or any agency thereof. The views and

228

Local approximation to the critical parameters of quantum wells  

E-Print Network (OSTI)

We calculate the critical parameters for some simple quantum wells by means of the Riccati-Pad\\'{e} method. The original approach converges reasonably well for nonzero angular-momentum quantum number $l$ but rather too slowly for the s states. We therefore propose a simple modification that yields remarkably accurate results for the latter case. The rate of convergence of both methods increases with $l$ and decreases with the radial quantum number $n$. We compare RPM results with WKB ones for sufficiently large values of $l$. As illustrative examples we choose the one-dimensional and central-field Gaussian wells as well as the Yukawa potential. The application of perturbation theory by means of the RPM to a class of rational potentials yields interesting and baffling unphysical results.

Francisco M. Fernández; Javier Garcia

2012-10-15T23:59:59.000Z

229

Key parameters influencing the performance of photocatalytic oxidation  

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

Key parameters influencing the performance of photocatalytic oxidation Key parameters influencing the performance of photocatalytic oxidation (PCO) air purification under realistic indoor conditions Title Key parameters influencing the performance of photocatalytic oxidation (PCO) air purification under realistic indoor conditions Publication Type Journal Article Year of Publication 2012 Authors Destaillats, Hugo, Mohamad Sleiman, Douglas P. Sullivan, Catherine Jacquiod, Jean Sablayrolles, and Laurent Molins Journal Applied Catalysis B: Environmental Volume 128 Pagination 159-170 Date Published 11/30/2012 Abstract Photocatalytic oxidation (PCO) air cleaning is a promising technology suitable for the elimination of a broad range of volatile organic compounds (VOCs). However, performance of poorly designed PCO systems may be affected by the formation of volatile aldehydes and other partially oxidized byproducts. This study explored the role of key design and dimensioning parameters that influence the effective removal of primary pollutants and can help reduce or eliminate the formation of secondary byproducts. A model pollutant mixture containing benzene, toluene, o-xylene, undecane, 1-butanol, formaldehyde and acetaldehyde was introduced at a constant rate in a 20-m3 environmental chamber operating at an air exchange rate of 1 h-1. Individual pollutant concentrations were kept at realistically low levels, between 2 and 40 μg m-3. A prototype air cleaner provided with flat or pleated PCO filtering media was operated in an external ductwork loop that recirculated chamber air at flow rates in the range 178-878 m3 h-1, corresponding to recycle ratios between 8.5 and 38. Air samples were collected upstream and downstream of the air cleaner and analyzed off-line to determine single-pass removal efficiency. The final-to-initial chamber concentration ratio was used to determine the global chamber removal efficiency for each pollutant. In the flat filter configuration, longer dwelling times of compounds on the TiO2 surface were attained by reducing the recirculation airflow by a factor of ∼5, leading to increasing total pollutant removal efficiency from 5% to 44%. Net acetaldehyde and formaldehyde removal was achieved, the later at airflow rates below 300 m3 h-1, illustrating the critical importance of controlling the contact time of primary and secondary pollutants with the TiO2 surface. The use of pleated media was shown to increase significantly the system performance by extending the dwelling time of pollutants on the irradiated surface of the PCO media, with a 70% degradation of target pollutants. With the pleated media, formaldehyde removal efficiency increased to 60%. Irradiation using either a UVC or a UVA lamp under identical flow conditions produced similar pollutant elimination. A simple correlation between the steady-state single pass removal efficiency and the global chamber removal efficiency was used to rationalize these experimental results and identify optimal operating conditions.

230

Blackbody radiation and distribution function with three parameters  

E-Print Network (OSTI)

The object of this work is to give the key to answer whether or not there is another numerical method which is different from the equation proposed by Planck to predict blackbody radiation by frequency. Firstly, Maxwell distribution function for molecule velocities was modified, resulting in a distribution function with three parameters for deriving monochromatic intensity of blackbody radiation through frequency. Then this simulation function was applied to estimate the energy density (Jm-2) of blackbody radiation by frequency at 5500 K, 5000 K, 4500 K, 4000 K, 3500 K and 2.73 K of temperature. The results of density simulated by means of distribution function suggested in this paper agree well with the experimental data. All of the correlation coefficients between actual and calculated data are 1.0; at the same time, the mean relative errors are less than 6.65% in total.

Changshi, Liu

2011-01-01T23:59:59.000Z

231

Blackbody radiation and distribution function with three parameters  

E-Print Network (OSTI)

The object of this work is to give the key to answer whether or not there is another numerical method which is different from the equation proposed by Planck to predict blackbody radiation by frequency. Firstly, Maxwell distribution function for molecule velocities was modified, resulting in a distribution function with three parameters for deriving monochromatic intensity of blackbody radiation through frequency. Then this simulation function was applied to estimate the energy density (Jm-2) of blackbody radiation by frequency at 5500 K, 5000 K, 4500 K, 4000 K, 3500 K and 2.73 K of temperature. The results of density simulated by means of distribution function suggested in this paper agree well with the experimental data. All of the correlation coefficients between actual and calculated data are 1.0; at the same time, the mean relative errors are less than 6.65% in total.

Liu Changshi

2010-08-19T23:59:59.000Z

232

Thermo-Mechanical Processing Parameters for the INCONEL ALLOY 740  

SciTech Connect

In 2000, a Cooperative Research and Development Agreement (CRADA) was undertaken between the Oak Ridge National Laboratory (ORNL) and the Special Metals Corporation (SMC) to determine the mechanical property response of the IN740 alloy to help establish thermo-mechanical processing parameters for the use of this alloy in supercritical and ultra-critical boiler tubes with the potential for other end uses. SMC had developed an alloy, commercially known as INCONEL alloy 740, which exhibited various beneficial physical, mechanical, and chemical properties. As part of SMC's on-going efforts to optimize this alloy for targeted boiler applications there was a need to develop an understanding of the thermo-mechanical response of the material, characterize the resulting microstructure from this processing, and possibly, utilize models to develop the appropriate processing scheme for this product.

Ludtka, G.M.; Smith, G.

2007-11-19T23:59:59.000Z

233

Implant for in-vivo parameter monitoring, processing and transmitting  

SciTech Connect

The present invention relates to a completely implantable intracranial pressure monitor, which can couple to existing fluid shunting systems as well as other internal monitoring probes. The implant sensor produces an analog data signal which is then converted electronically to a digital pulse by generation of a spreading code signal and then transmitted to a location outside the patient by a radio-frequency transmitter to an external receiver. The implanted device can receive power from an internal source as well as an inductive external source. Remote control of the implant is also provided by a control receiver which passes commands from an external source to the implant system logic. Alarm parameters can be programmed into the device which are capable of producing an audible or visual alarm signal. The utility of the monitor can be greatly expanded by using multiple pressure sensors simultaneously or by combining sensors of various physiological types.

Ericson, Milton N. (Knoxville, TN); McKnight, Timothy E. (Greenback, TN); Smith, Stephen F. (London, TN); Hylton, James O. (Clinton, TN)

2009-11-24T23:59:59.000Z

234

The parameter space of Cubic Galileon models for cosmic acceleration  

E-Print Network (OSTI)

We use recent measurements of the expansion history of the universe to place constraints on the parameter space of cubic Galileon models. This gives strong constraints on the Lagrangian of these models. Most dynamical terms in the Galileon Lagrangian are constraint to be small and the acceleration is effectively provided by a constant term in the scalar potential, thus reducing, effectively, to a LCDM model for current acceleration. The effective equation of state is indistinguishable from that of a cosmological constant w = -1 and the data constraint it to have no temporal variations of more than at the few % level. The energy density of the Galileon can contribute only to about 10% of the acceleration energy density, being the other 90% a cosmological constant term. This demonstrates how useful direct measurements of the expansion history of the universe are at constraining the dynamical nature of dark energy.

Bellini, Emilio

2013-01-01T23:59:59.000Z

235

Unstable particles, gauge invariance and the Delta^{++} resonance parameters  

E-Print Network (OSTI)

The elastic and radiative pion(+)-proton scattering are studied in the framework of an effective Lagrangian model for the Delta^{++} resonance and its interactions. The finite width effects of this spin-3/2 resonance are introduced in the scattering amplitudes through a complex mass scheme to respect electromagnetic gauge invariance. The resonant pole (Delta^{++}) and background contributions (rho^0, sigma, Delta and neutron states) are separated according to the principles of the analytic S-matrix theory. The mass and width parameters of the \\Delta^{++} obtained from a fit to experimental data on the total cross section are in agreement with the results of a model-independent analysis based on the analytic S-matrix approach. The magnetic dipole moment determined from the radiative pion-proton scattering is mu_Delta^{++}=(6.14 +/- 0.51) nuclear magnetons.

G. Lopez Castro; A. Mariano

2003-02-24T23:59:59.000Z

236

Influence of electron beam parameters on coherent electron cooling  

Science Conference Proceedings (OSTI)

Coherent electron cooling (CeC) promises to revolutionize the cooling of high energy hadron beams. The intricate dynamics of the CeC depends both on the local density and energy distribution of the beam. The variations of the local density (beam current) are inevitable in any realistic beam. Hence, in this paper we propose a novel method of beam conditioning. The conditioning provides compensation of effect from such variation by a correlated energy modulation. We use our analytical FEL model for an electron bunch with Gaussian line charge density and cosine-type energy variation along bunch. We analyze the phase variation between the electron density modulation at the exit of the FEL-amplifier and the ions inducing it in the modulator as a function of the peak current and the electron beam energy. Based on this analysis, electron bunch parameters for optimal CeC cooling are found numerically.

Wang G.; Hao, Y.; Litvinenko, V.N.; Webb, S.

2012-05-20T23:59:59.000Z

237

CORE PARAMETER STUDY FOR A 300-MW SODIUM GRAPHITE REACTOR  

SciTech Connect

A core parameter study of the operating costs was performed for a 300- Mwe sodium graphite reactor, a scale-up of the Hallam Power Reactor. The results of the study indicate that the core design is nsar optimum and that core modifications would reduce the power costs by less than 5%. The lattice spacing, fuel rod diameter, and sodium flow can be varied within a rather broad range without significant changes in power generation costs. The effect of the fuel cladning thickness is more significant; fuel cycle costs can be reduced if stainless steel canning is replaced with zirconium canning. Use of UC in place of uraniummolybdenum fuel would also permit cost reductions. (D.L.C.)

Corcoran, W.P.

1959-10-22T23:59:59.000Z

238

Geographic and Operational Site Parameters List (GOSPL) for Hanford Assessments  

SciTech Connect

This data package was originally prepared to support a 2004 composite analysis (CA) of low-level waste disposal at the Hanford Site. The Technical Scope and Approach for the 2004 Composite Analysis of Low Level Waste Disposal at the Hanford Site (Kincaid et. al. 2004) identified the requirements for that analysis and served as the basis for initial preparation of this data package. Completion of the 2004 CA was later deferred, with the 2004 Annual Status Report for the Composite Analysis of Low-Level Waste Disposal in the Central Plateau at the Hanford Site (DOE 2005) indicating that a comprehensive update to the CA was in preparation and would be submitted in 2006. However, the U.S. Department of Energy (DOE) has recently decided to further defer the CA update and will use the cumulative assessment currently under preparation for the environmental impact statement (EIS) being prepared for tank closure and other site decisions as the updated CA. Submittal of the draft EIS is currently planned for FY 2008. This data package describes the facility-specific parameters (e.g. location, operational dates, etc.) used to numerically simulate contaminant flow and transport in large-scale Hanford assessments. Kincaid et al. (2004) indicated that the System Assessment Capability (SAC) (Kincaid et al. 2000; Bryce et al. 2002; Eslinger 2002a, 2002b) would be used to analyze over a thousand different waste sites. A master spreadsheet termed the Geographic and Operational Site Parameters List (GOSPL) was assembled to facilitate the generation of keyword input files containing general information on each waste site/facility, its operational/disposal history, and its environmental settings (past, current, and future). This report briefly describes each of the key data fields, including the source(s) of data, and provides the resulting inputs to be used for large-scale Hanford assessments.

Last, George V.; Nichols, William E.; Kincaid, Charles T.

2006-06-01T23:59:59.000Z

239

Relativistic Nuclear Energy Density Functionals: adjusting parameters to binding energies  

E-Print Network (OSTI)

We study a particular class of relativistic nuclear energy density functionals in which only nucleon degrees of freedom are explicitly used in the construction of effective interaction terms. Short-distance (high-momentum) correlations, as well as intermediate and long-range dynamics, are encoded in the medium (nucleon density) dependence of the strength functionals of an effective interaction Lagrangian. Guided by the density dependence of microscopic nucleon self-energies in nuclear matter, a phenomenological ansatz for the density-dependent coupling functionals is accurately determined in self-consistent mean-field calculations of binding energies of a large set of axially deformed nuclei. The relationship between the nuclear matter volume, surface and symmetry energies, and the corresponding predictions for nuclear masses is analyzed in detail. The resulting best-fit parametrization of the nuclear energy density functional is further tested in calculations of properties of spherical and deformed medium-heavy and heavy nuclei, including binding energies, charge radii, deformation parameters, neutron skin thickness, and excitation energies of giant multipole resonances.

T. Niksic; D. Vretenar; P. Ring

2008-09-08T23:59:59.000Z

240

Composition dependence of the interaction parameter in isotopic polymer blends  

SciTech Connect

Isotopic polymer mixtures lack the structural asymmetries and specific interactions encountered in blends of chemically distinct species. In this respect, they form ideal model systems for exploring the limitations of the widely-used Flory-Huggins (FH) lattice model and for testing and improving new theories of polymer thermodynamics. The FH interaction parameter between deuterium-labeled and unlabeled segments of the same species ([sub [chi]HD]) should in principle be independent of concentration ([phi]), through previous small-angle neutron scattering (SANS) experiments have shown that it exhibits a minimum at [phi] [approximately] 0.5 for poly(vinylethylene) (PVE) and poly(ethylethylene) (PEE). The authors report new data on polyethylene (PE) as a function of molecular weight, temperature (T), and [phi], which show qualitatively similar behavior. However, measurements on [sub [chi]HD]([phi]) for polystyrene (PS) show a maximum at [phi] [approximately]0.5, in contrast to PVE, PEE, and PE. Reproducing the concentration dependence of [phi] in different model isotopic systems should serve as a sensitive test of the way in which theories of polymer thermodynamics can account for the details of the local packing and also the effects of noncombinatorial entropy, which appear to be the main cause of the variation of [sub [chi]HD]([phi]) for PE. These data also serve to quantify the effects of isotopic substitution in SANS experiments on polyolefin blends and thus lay the ground work for definitive studies of the compatibility of branched and linear polyethylenes.

Londono, J.D.; Narten, A.H.; Wignall, G.D. (Oak Ridge National Lab., TN (United States)); Honnell, K.G.; Hsieh, E.T.; Johnson, T.W. (Phillips Petroleum Co., Bartlesville, OK (United States). Research and Development); Bates, F.S. (Univ. of Minnesota, Minneapolis, MN (United States). Dept. of Chemical Engineering)

1994-05-09T23:59:59.000Z

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241

Design Parameters of a Miniaturized Piezoelectric Underwater Acoustic Transmitter  

Science Conference Proceedings (OSTI)

The Juvenile Salmon Acoustic Telemetry System (JSATS) project supported by the U.S. Army Corps of Engineers, Portland District, has yielded the smallest acoustic fish tag transmitter commercially available to date. In order to study even smaller fish populations and make the transmitter injectable by needles, the JSATS acoustic micro transmitter needs to be further downsized. As part of the transmitter downsizing effort some of the design parameters of the lead zirconate titanate (PZT) ceramic tube transducer in the transmitter were studied, including the type of PZT, the backing material, the necessary drive voltage, the transmitting bandwidth and the length of the transducer. It was found that, to satisfy the 156-dB source level requirement of JSATS, a square wave with a 10-volt amplitude is required to drive 'soft' PZT transducers. PZT-5H demonstrated the best source level performance. For Navy types I and II, 16 volts or 18 volts were needed. Ethylene-propylene-diene monomer (EPDM) closed-cell foam was found to be the backing material providing the highest source level. The effect of tube length on the source level is also demonstrated in this paper, providing quantitative information for downsizing of small piezoelectric transmitters.

Li, Huidong; Deng, Zhiqun; Yuan, Yong; Carlson, Thomas J.

2012-07-02T23:59:59.000Z

242

Barchan dune corridors: field characterization and investigation of control parameters  

E-Print Network (OSTI)

The structure of the barchan field located between Tarfaya and Laayoune (Atlantic Sahara, Morocco) is quantitatively investigated and compared to that in La Pampa de la Joya (Arequipa, Peru). On the basis of field measurements, we show how the volume, the velocity and the output sand flux of a dune can be computed from the value of its body and horn widths. The dune size distribution is obtained from the analysis of aerial photographs. It shows that these fields are in a statistically homogeneous state along the wind direction and present a `corridor' structure in the transverse direction, in which the dunes have a rather well selected size. Investigating the possible external parameters controlling these corridors, we demonstrate that none among topography, granulometry, wind and sand flux is relevant. We finally discuss the dynamical processes at work in these fields (collisions and wind fluctuations), and investigate the way they could regulate the size of the dunes. Furthermore we show that the overall sand flux transported by a dune field is smaller than the maximum transport that could be reached in the absence of dunes, i.e. in saltation over the solid ground.

Hicham Elbelrhiti; Bruno Andreotti; Philippe Claudin

2006-09-06T23:59:59.000Z

243

Sensitivity of numerical dispersion modeling to explosive source parameters  

Science Conference Proceedings (OSTI)

The calculation of downwind concentrations from non-traditional sources, such as explosions, provides unique challenges to dispersion models. The US Department of Energy has assigned the Atmospheric Release Advisory Capability (ARAC) at the Lawrence Livermore National Laboratory (LLNL) the task of estimating the impact of accidental radiological releases to the atmosphere anywhere in the world. Our experience includes responses to over 25 incidents in the past 16 years, and about 150 exercises a year. Examples of responses to explosive accidents include the 1980 Titan 2 missile fuel explosion near Damascus, Arkansas and the hydrogen gas explosion in the 1986 Chernobyl nuclear power plant accident. Based on judgment and experience, we frequently estimate the source geometry and the amount of toxic material aerosolized as well as its particle size distribution. To expedite our real-time response, we developed some automated algorithms and default assumptions about several potential sources. It is useful to know how well these algorithms perform against real-world measurements and how sensitive our dispersion model is to the potential range of input values. In this paper we present the algorithms we use to simulate explosive events, compare these methods with limited field data measurements, and analyze their sensitivity to input parameters. 14 refs., 7 figs., 2 tabs.

Baskett, R.L. (EG and G Energy Measurements, Inc., Pleasanton, CA (USA)); Cederwall, R.T. (Lawrence Livermore National Lab., CA (USA))

1991-02-13T23:59:59.000Z

244

Bayesian analysis of inflation: Parameter estimation for single field models  

Science Conference Proceedings (OSTI)

Future astrophysical data sets promise to strengthen constraints on models of inflation, and extracting these constraints requires methods and tools commensurate with the quality of the data. In this paper we describe ModeCode, a new, publicly available code that computes the primordial scalar and tensor power spectra for single-field inflationary models. ModeCode solves the inflationary mode equations numerically, avoiding the slow roll approximation. It is interfaced with CAMB and CosmoMC to compute cosmic microwave background angular power spectra and perform likelihood analysis and parameter estimation. ModeCode is easily extendable to additional models of inflation, and future updates will include Bayesian model comparison. Errors from ModeCode contribute negligibly to the error budget for analyses of data from Planck or other next generation experiments. We constrain representative single-field models ({phi}{sup n} with n=2/3, 1, 2, and 4, natural inflation, and 'hilltop' inflation) using current data, and provide forecasts for Planck. From current data, we obtain weak but nontrivial limits on the post-inflationary physics, which is a significant source of uncertainty in the predictions of inflationary models, while we find that Planck will dramatically improve these constraints. In particular, Planck will link the inflationary dynamics with the post-inflationary growth of the horizon, and thus begin to probe the ''primordial dark ages'' between TeV and grand unified theory scale energies.

Mortonson, Michael J. [Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, Ohio 43210 (United States); Peiris, Hiranya V. [Institute of Astronomy and Kavli Institute for Cosmology, University of Cambridge, Cambridge CB3 0HA (United Kingdom); Department of Physics and Astronomy, University College London, London WC1E 6BT (United Kingdom); Easther, Richard [Department of Physics, Yale University, New Haven, Connecticut 06520 (United States)

2011-02-15T23:59:59.000Z

245

Bayesian Analysis of Inflation: Parameter Estimation for Single Field Models  

E-Print Network (OSTI)

Future astrophysical datasets promise to strengthen constraints on models of inflation, and extracting these constraints requires methods and tools commensurate with the quality of the data. In this paper we describe ModeCode, a new, publicly available code that computes the primordial scalar and tensor power spectra for single field inflationary models. ModeCode solves the inflationary mode equations numerically, avoiding the slow roll approximation. It is interfaced with CAMB and CosmoMC to compute cosmic microwave background angular power spectra and perform likelihood analysis and parameter estimation. ModeCode is easily extendable to additional models of inflation, and future updates will include Bayesian model comparison. Errors from ModeCode contribute negligibly to the error budget for analyses of data from Planck or other next generation experiments. We constrain representative single field models (phi^n with n=2/3, 1, 2, and 4, natural inflation, and "hilltop" inflation) using current data, and provide forecasts for Planck. From current data, we obtain weak but nontrivial limits on the post-inflationary physics, which is a significant source of uncertainty in the predictions of inflationary models, while we find that Planck will dramatically improve these constraints. In particular, Planck will link the inflationary dynamics with the post-inflationary growth of the horizon, and thus begin to probe the "primordial dark ages" between TeV and GUT scale energies.

Michael J. Mortonson; Hiranya V. Peiris; Richard Easther

2010-07-23T23:59:59.000Z

246

Source Parameter Investigation of the 1993 Rock Valley Earthquake Sequence  

E-Print Network (OSTI)

Close portable recordings of the RockValley earthquake sequence con#rm the unusually shallow 2 km average hypocentral depths, and provide data for an investigation of the source parameters. Stress drops are estimated using both a spectral #tting technique that #rst corrects for attenuation, and a deconvolution technique that inherently accounts for attenuation. The shallow depths suggest a relatively low level of shear stress acting on the RockValley fault, and allow an estimation of seismic e#ciencies. The data allow the possibility of large stress drops, on the order of 100 bars, implying seismic e#ciencies much greater than 0.1. This has important implications for the unresolved issue of the strength of faults in general. A dependence of stress drop with seismic moment remains unresolvable with this data. However, the possibility of partial stress drops and non-linear responses does exist. A seismic survey designed speci#cally for the purpose of measuring attenuation could resolve t...

Gordon Shields; Gordon Shields

1999-01-01T23:59:59.000Z

247

Uncertainty estimation of core safety parameters using cross-correlations of covariance matrix  

Science Conference Proceedings (OSTI)

An uncertainty estimation method for core safety parameters, for which measurement values are not obtained, is proposed. We empirically recognize the correlations among the prediction errors among core safety parameters, e.g., a correlation between the control rod worth and assembly relative power of corresponding position. Correlations of uncertainties among core safety parameters are theoretically estimated using the covariance of cross sections and sensitivity coefficients for core parameters. The estimated correlations among core safety parameters are verified through the direct Monte-Carlo sampling method. Once the correlation of uncertainties among core safety parameters is known, we can estimate the uncertainty of a safety parameter for which measurement value is not obtained. Furthermore, the correlations can be also used for the reduction of uncertainties of core safety parameters. (authors)

Yamamoto, A.; Yasue, Y.; Endo, T. [Graduate School of Engineering, Nagoya Univ., Furo-cho, Chikusa-ku, Nagoya (Japan); Kodama, Y.; Ohoka, Y.; Tatsumi, M. [Nuclear Fuel Industries, Ltd., Asashiro-nishi, Kumatori-cho, Osaka (Japan)

2012-07-01T23:59:59.000Z

248

A Three Parameter Representation of the Shape and Size Distributions of Hailstones—A Case Study  

Science Conference Proceedings (OSTI)

The characteristics of shapes and sizes of a sample of 679 hailstones, collected on 22 June 1976 during a hailstorm at Grover, Colorado, were analyzed using a three-parameter formula developed by us previously. These parameters are a, the ...

Pao K. Wang; Thomas J. Greenwald; Jianlu Wang

1987-04-01T23:59:59.000Z

249

A Physically Based, Nondimensional Parameter for Discriminating between Locations of Freezing Rain and Ice Pellets  

Science Conference Proceedings (OSTI)

A nondimensional parameter is presented that can he used to help distinguish between conditions favorable for the occurrence of freezing rain and ice pellets. The parameter was derived from the well-established condition that most incidents of ...

Robert R. Czys; Robert W. Scott; K. C. Tang; Ronald W. Przybylinski; Michael E. Sabones

1996-12-01T23:59:59.000Z

250

Retrieval of Atmospheric Parameters from Hydrometeor Backscatter Measured with Doppler Radar Profiler  

Science Conference Proceedings (OSTI)

The evaluation of backscatter spectra of clouds and precipitation measured with Doppler radar profilers allows the retrieval of a number of important atmospheric parameters. This retrieval leads to inaccurate results if vertical wind parameters ...

Dirk Klugmann

2001-01-01T23:59:59.000Z

251

Bayesian Inference of Drag Parameters Using AXBT Data from Typhoon Fanapi  

Science Conference Proceedings (OSTI)

The authors introduce a three-parameter characterization of the wind speed dependence of the drag coefficient and apply a Bayesian formalism to infer values for these parameters from airborne expendable bathythermograph (AXBT) temperature data ...

Ihab Sraj; Mohamed Iskandarani; Ashwanth Srinivasan; W. Carlisle Thacker; Justin Winokur; Alen Alexanderian; Chia-Ying Lee; Shuyi S. Chen; Omar M. Knio

2013-07-01T23:59:59.000Z

252

Enhancing parameter estimation of biochemical networks by exponentially scaled search steps  

Science Conference Proceedings (OSTI)

A fundamental problem of modelling in Systems Biology is to precisely characterise quantitative parameters, which are hard to measure experimentally. For this reason, it is common practise to estimate these parameter values, using evolutionary and other ...

Hendrik Rohn; Bashar Ibrahim; Thorsten Lenser; Thomas Hinze; Peter Dittrich

2008-03-01T23:59:59.000Z

253

Nonlinear Parameter Estimation: Comparison of an Ensemble Kalman Smoother with a Markov Chain Monte Carlo Algorithm  

Science Conference Proceedings (OSTI)

This paper explores the temporal evolution of cloud microphysical parameter uncertainty using an idealized 1D model of deep convection. Model parameter uncertainty is quantified using a Markov chain Monte Carlo (MCMC) algorithm. A new form of the ...

Derek J. Posselt; Craig H. Bishop

2012-06-01T23:59:59.000Z

254

Inverse Parameter Estimation of the Turbulent Surface Layer from Single-Level Data and Surface Temperature  

Science Conference Proceedings (OSTI)

A simple inverse parameter estimation method is used in a practical diagnostic approach to obtain the surface roughness lengths and surface resistance parameters from a chi-square cost function containing measurements of wind speed and air ...

P. Martano

2008-04-01T23:59:59.000Z

255

Parameter estimation of permanent magnet stepper motors without position or velocity sensors  

E-Print Network (OSTI)

Parameter estimation of permanent magnet stepper motors without position or velocity sensors Romain identification method for permanent magnet stepper motors. Current sensors are assumed available, but position magnet stepper motors, syn- chronous motors, sensorless systems, parameter identification, elimination

Paris-Sud XI, Université de

256

Genetic Programming Based Approach for Synchronization with Parameter Mismatches in EEG  

Science Conference Proceedings (OSTI)

Effects of parameter mismatches in synchronized time series are studied first for an analytical non-linear dynamical system (coupled logistic map, CLM) and then in a real system (Electroencephalograph (EEG) signals). The internal system parameters derived ...

Dilip P. Ahalpara; Siddharth Arora; M. S. Santhanam

2009-04-01T23:59:59.000Z

257

Retrieval of Vertical Profiles of Cirrus Cloud Microphysical Parameters from Doppler Radar and Infrared Radiometer Measurements  

Science Conference Proceedings (OSTI)

This paper describes a new method to retrieve vertical profiles of the parameters of cirrus cloud microphysics that are important for the estimation of climatic feedback. These parameters are the particle characteristic size and ice mass content. ...

S. Y. Matrosov; B. W. Orr; R. A. Kropfli; J. B. Snider

1994-05-01T23:59:59.000Z

258

Relations between Optically Derived Aerosol Parameters, Humidity, and Air-Quality Data in an Urban Atmosphere  

Science Conference Proceedings (OSTI)

This paper deals with diurnal and mensual correlations between ground-based atmospheric observations of columnar and surface optical parameters, standard surface humidity parameters, and surface air-quality data. The implications of a significant ...

N. T. O'Neill; A. Royer; P. Coté; L. J. B. McArthur

1993-09-01T23:59:59.000Z

259

Modal parameter extraction from large operating structures using ambient excitation  

DOE Green Energy (OSTI)

A technique called the Natural Excitation Technique or has been developed to response extract response parameters from large operational structure when subjected to random and unmeasured forces such as wind, road noise, aerodynamics, or waves. Six applications of NExT to ambient excitation testing and NExT analysis are surveyed in this paper with a minimum of technical detail. In the first application, NExT was applied to a controlled-yaw Horizontal-Axis Wind Turbine (HAWT). By controlling the yaw degree of freedom an important class of rotating coordinate system effects are reduced. A new shape extraction procedure was applied to this data set with good results. The second application was to a free-yaw HAWT. The complexity of the response has prompted further analytical studies and the development of a specialized visualization package. The third application of NExT was to a parked three-bladed Vertical-Axis Wind Turbine (VAWT) in which traditional modal testing could not excite all modes of interest. The shape extraction process used cross-correlation functions directly in a time-domain shape-fitting routine. The fourth application was to ground transportation systems. Ongoing work to improve driver and passenger comfort in tractor-trailer vehicles and to refine automobile body and tire models will use NExT. NExT has been used to process ambient vibration data for Finite Element Model correlation and is being used to study Structural Health Monitoring with ambient excitation. Shape fitting was performed using amplitude and phase information taken directly from the cross-spectra. The final application is to an offshore structure. This work is on-going, however initial studies have found a high-modal density, high noise content, and sparse data set.

James, G.H. III; Carne, T.G.; Mayes, R.L.

1995-12-31T23:59:59.000Z

260

ZERO IMPACT PARAMETER WHITE DWARF COLLISIONS IN FLASH  

Science Conference Proceedings (OSTI)

We systematically explore zero impact parameter collisions of white dwarfs (WDs) with the Eulerian adaptive grid code FLASH for 0.64 + 0.64 M {sub Sun} and 0.81 + 0.81 M {sub Sun} mass pairings. Our models span a range of effective linear spatial resolutions from 5.2 Multiplication-Sign 10{sup 7} to 1.2 Multiplication-Sign 10{sup 7} cm. However, even the highest resolution models do not quite achieve strict numerical convergence, due to the challenge of properly resolving small-scale burning and energy transport. The lack of strict numerical convergence from these idealized configurations suggests that quantitative predictions of the ejected elemental abundances that are generated by binary WD collision and merger simulations should be viewed with caution. Nevertheless, the convergence trends do allow some patterns to be discerned. We find that the 0.64 + 0.64 M {sub Sun} head-on collision model produces 0.32 M {sub Sun} of {sup 56}Ni and 0.38 M {sub Sun} of {sup 28}Si, while the 0.81 + 0.81 M {sub Sun} head-on collision model produces 0.39 M {sub Sun} of {sup 56}Ni and 0.55 M {sub Sun} of {sup 28}Si at the highest spatial resolutions. Both mass pairings produce {approx}0.2 M {sub Sun} of unburned {sup 12}C+{sup 16}O. We also find the 0.64 + 0.64 M {sub Sun} head-on collision begins carbon burning in the central region of the stalled shock between the two WDs, while the more energetic 0.81 + 0.81 M {sub Sun} head-on collision raises the initial post-shock temperature enough to burn the entire stalled shock region to nuclear statistical equilibrium.

Hawley, W. P.; Athanassiadou, T.; Timmes, F. X., E-mail: Wendy.Hawley@asu.edu [School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287 (United States)

2012-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "tox parameter tox" 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

The application of artificial neural networks and autoregressive techniques for Earth Orientation Parameters prediction  

E-Print Network (OSTI)

Parameters prediction Acknowledgement: Maciej Kalarus, Harald Schuh, Wies³aw Kosek, Waldemar Popiñski EOPc01

Schuh, Harald

262

Tracking the random surfer: empirically measured teleportation parameters in PageRank  

Science Conference Proceedings (OSTI)

PageRank computes the importance of each node in a directed graph under a random surfer model governed by a teleportation parameter. Commonly denoted alpha, this parameter models the probability of following an edge inside the graph or, when the graph ... Keywords: PageRank, Wikipedia, click trail analysis, empirical click probability, teleportation parameter, toolbar data

David F. Gleich; Paul G. Constantine; Abraham D. Flaxman; Asela Gunawardana

2010-04-01T23:59:59.000Z

263

Recovery of 3D Solar Magnetic Field Model Parameter Using Image Structure Matching  

Science Conference Proceedings (OSTI)

An approach to recover a 3D solar magnetic field model parameter using intensity images of the Sun's corona is introduced. The approach is a quantitative approach in which the 3D model parameter is determined via an image structure matching scheme. The ... Keywords: 3D Parameter Recovery, Image-based Modeling, Structure Matching

Jong Kwan Lee; G. Allen Gary

2009-05-01T23:59:59.000Z

264

Brief paper: Distributed parameter system optimum control design via finite element discretization  

Science Conference Proceedings (OSTI)

The problem of designing an optimum distributed parameter system is considered. Fundamental concepts pertaining to the solution of optimum controls for distributed parameter systems by finite element methods are devised. It is demonstrated that methods ... Keywords: Distributed parameter systems, finite element method, numerical methods, optimal control, partial differential equations

R. K. Cavin, III; S. C. Tandon

1977-11-01T23:59:59.000Z

265

Solar Neutrino Oscillation Parameters in Experiments with Reactor Anti-Neutrinos  

E-Print Network (OSTI)

We review the current status of the solar neutrino oscillation parameters. We discuss the conditions under which measurements from future solar neutrino experiments would determine the oscillation parameters precisely. Finally we expound the potential of long baseline reactor anti-neutrino experiments in measuring the solar neutrino oscillation parameters.

Sandhya Choubey

2004-02-27T23:59:59.000Z

266

Optimized Parameter Matching Method of Plug-in Series Hybrid Electric Bus  

Science Conference Proceedings (OSTI)

This research attempts to deal with the coupling-influence among different powertrain parameters in the parameter matching process of Plug-in Series Hybrid Electric Bus(PSHEB), the research target is a PSHEB (with no gearbox) which is currently under ... Keywords: Plug-in, hybrid electric vehicle, parameter matching, Matlab simulation

Kai Xu, Bin Qiu

2012-12-01T23:59:59.000Z

267

Parameter control system of evolutionary algorithm that is aided by the entire search history  

Science Conference Proceedings (OSTI)

In solving problems with evolutionary algorithms (EAs), the performance of the EA will be affected by its properties. As the properties of EA depend on the parameter setting, users need to tune the parameters to optimize the performance on different ... Keywords: Add-on system, Fitness approximation using search history, Parameter control, Search history

Shing Wa Leung; Shiu Yin Yuen; Chi Kin Chow

2012-09-01T23:59:59.000Z

268

Basis functions and parameter optimisation in high-order iterative learning control  

Science Conference Proceedings (OSTI)

In this paper a new parameter-optimal high-order Iterative Learning Control (ILC) algorithms is proposed to extend the work of Owens and Feng [Parameter optimisation in iterative learning control. International Journal of Control 14(11), 1059-1069]. ... Keywords: Basis functions, Iterative learning control, Parameter optimisation

J. HäTöNen; D. H. Owens; K. Feng

2006-02-01T23:59:59.000Z

269

Effects of flaxseed lignans on laying hen reproductive parameters  

E-Print Network (OSTI)

Flaxseed, rich in the essential omega-3 fatty acid (FA) linolenic acid (LNA; C18:3n-3), can be included in laying hen rations for the production of omega-3 FAenriched shell eggs. In addition to being a rich source of LNA, flaxseed is also the most abundant food source of the plant lignans secoisolariciresinol-diglycoside (SDG) and matairesinol, which serve as precursors for the bacterial synthesis of lignans in mammals. Lignans are known to possess weak estrogenic/antiestrogenic characteristics due to their structural similarity to endogenous estrogens. In the current study, dietary flaxseed (I 5%) was included in poultry rations to evaluate the influence of flaxseed on the reproductive performance and health of 18 to 28-week-old laying hens. Serum estradiol concentrations, body, liver, reproductive organ weights, and follicular (Fl to F5) weights and diameters, were determined during regular sample periods. Changes in reproductive organ characteristics were accompanied by a significant reduction in circulating estradiol in response to 15% dietary flaxseed, suggesting that flaxseed lignans may influence the avian endocrine environment. Although many studies have confirmed the bacterial synthesis of lignans in mammals, these phytocheniicals have never before been studied in a non-mammalian model. A further study was conducted to determine-nine the capability of the hen cecal microflora to convert SDG and matairesinol to lignan compounds. The production of "avian lignans" was verified in vitro after exposing pullet cecal microflora to the lignan precursors of flaxseed. As the SDG content, and therefore lignan production capability, varies between cultivars, different strains namely Flanders (low SDG/high LNA) and Linola 947 TM (high SDG/low LNA) were evaluated for their influence on laying hen estradiol. Reductions in serum estradiol were not observed as in earlier experiments, indicating that another mechanism may also play a role in the hormonal modulation in young laying hens. In conclusion, dietary flaxseed may influence the avian endocrine environment and thus laying hen reproductive parameters. This influence may impact production consistency in the egg industry. It is possible that this effect may be circumvented by supplementing diets with a lower level of a flaxseed or by using reproductively mature hens.

Kennedy, Abigail Koehler

1997-01-01T23:59:59.000Z

270

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

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

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

271

Impact of key design parameters on neutron wall load in an ignited tokamak  

SciTech Connect

A study was performed to determine the impact of key design parameters on neutron wall load in an ignited deuterium-tritium (D-T) tokamak. Systems effects of parameter variations were determined using the Fusion Engineering Design Center (FEDC) Systems Code. Poloidal variations in neutron wall load were determined using the Monte Carlo Code for Neutron and Photon Transport (MCNP). The marked impact of key design parameters is quantitatively shown.

Reiersen, W.T.

1983-01-01T23:59:59.000Z

272

Constraining the Parameters of Modified Chaplygin Gas in Einstein-Aether Gravity  

E-Print Network (OSTI)

We have assumed FRW model of the universe in Einstein-Aether gravity filled with dark matter and Modified Chaplygin gas (MCG) type dark energy. We present the Hubble parameter in terms of some unknown parameters and observational parameters with the redshift z. From observed Hubble data (OHD) set (12 points), we have obtained the bounds of the arbitrary parameters (A,B) of MCG by minimizing the \\chi^{2} test. Next due to joint analysis of BAO and CMB observations, we have also obtained the best fit values and the bounds of the parameters (A,B) by fixing some other parameters. We have also taken type Ia supernovae data set (union 2 data set with 557 data points). Next due to joint analysis with SNe, we have obtained the best fit values of parameters. The best-fit values and bounds of the parameters are obtained by 66%, 90% and 99% confidence levels for OHD, OHD+BAO, OHD+BAO+CMB and OHD+BAO+CMB+SNe joint analysis. The distance modulus \\mu(z) against redshift z for our theoretical MCG model in Einstein-Aether gravity have been tested for the best fit values of the parameters and the observed SNe Ia union2 data sample.

Ujjal Debnath

2013-10-06T23:59:59.000Z

273

DEVELOPMENT OF A PROGRAM TO DETERMINE HIDDEN PERFORMANCE PARAMETERS OF A GASTURBINE.  

E-Print Network (OSTI)

?? Gas turbines overall theoretical performance analysis can be performed by using several thermodynamic theories and equations with the help of design parameters. However, limited… (more)

Ranasinghe, Chamila

2013-01-01T23:59:59.000Z

274

Postponing the Choice of the Barrier Parameter in Mehrotra-Type ...  

E-Print Network (OSTI)

Sep 1, 2005 ... Postponing the Choice of the Barrier Parameter in Mehrotra-Type Predictor- Corrector Algorithms. Maziar Salahi (salahim ***at*** mcmaster.ca)

275

Polyacrylonitrile / carbon nanotube composite fibers: effect of various processing parameters on fiber structure and properties .  

E-Print Network (OSTI)

??This study elucidates the effect of various processing parameters on polyacrylonitrile (PAN) /carbon nanotube (CNT) composite fiber structure and properties. Interaction between PAN and MWNT… (more)

Choi, Young Ho

2010-01-01T23:59:59.000Z

276

Analytic Estimate of the Order Parameter for Monopole Condensation in QCD  

E-Print Network (OSTI)

The disorder parameter $$ for the condensation of monopoles in QCD is estimated analytically in terms of gauge invariant field strength correlators. The continuum limit is discussed.

Adriano Di Giacomo

2006-10-18T23:59:59.000Z

277

The influence of macrostructure and other physical characteristics on compressive parameters of mineral wool products.  

E-Print Network (OSTI)

??The dissertation investigates the influence of macrostructure and other physical properties on mineral wool compressive parameters. The subject of the research is rigid mineral wool… (more)

Buska,; Andrius

2010-01-01T23:59:59.000Z

278

Model-based estimation of time-varying parameters and state variables in aerobic bioprocesses  

Science Conference Proceedings (OSTI)

Keywords: adaptive observer, aerobic bioprocess, biomass concentration, biomass growth rate, model-based estimation, observer stability, oxygen comsumption, time-varying parameters, yield coefficient

V. Lubenova

2000-08-01T23:59:59.000Z

279

Influence of Process and Thermo-physical Parameters on the Heat ...  

Science Conference Proceedings (OSTI)

Presentation Title, W-65: Influence of Process and Thermo-physical Parameters on the Heat Transfer at Electron Beam Melting of Cu and Ta. Author(s), Katia ...

280

Data-free inference of the joint distribution of uncertain model parameters.  

SciTech Connect

It is known that, in general, the correlation structure in the joint distribution of model parameters is critical to the uncertainty analysis of that model. Very often, however, studies in the literature only report nominal values for parameters inferred from data, along with confidence intervals for these parameters, but no details on the correlation or full joint distribution of these parameters. When neither posterior nor data are available, but only summary statistics such as nominal values and confidence intervals, a joint PDF must be chosen. Given the summary statistics it may not be reasonable nor necessary to assume the parameters are independent random variables. We demonstrate, using a Bayesian inference procedure, how to construct a posterior density for the parameters exhibiting self consistent correlations, in the absence of data, given (1) the fit-model, (2) nominal parameter values, (3) bounds on the parameters, and (4) a postulated statistical model, around the fit-model, for the missing data. Our approach ensures external Bayesian updating while marginalizing over possible data realizations. We then address the matching of given parameter bounds through the choice of hyperparameters, which are introduced in postulating the statistical model, but are not given nominal values. We discuss some possible approaches, including (1) inferring them in a separate Bayesian inference loop and (2) optimization. We also perform an empirical evaluation of the algorithm showing the posterior obtained with this data free inference compares well with the true posterior obtained from inference against the full data set.

Marzouk, Youssef M. (Massachusetts Institute of Technology, Boston, MA); Adalsteinsson, Helgi; Berry, Robert Dan; Debusschere, Bert J.; Najm, Habib N.

2010-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "tox parameter tox" 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

Ab Initio Calculation of 17 O NMR Parameters of Tricluster ... - TMS  

Science Conference Proceedings (OSTI)

Oct 15, 2006 ... Ab Initio Calculation of 17O NMR Parameters of Tricluster Oxygen Sites in Borosilicate Glasses by Y. Yoneyama, M. Urushihara, S. Sakida, ...

282

Systematic parameter estimation and sensitivity analysis using a multidimensional PEMFC model coupled with DAKOTA.  

DOE Green Energy (OSTI)

Current computational models for proton exchange membrane fuel cells (PEMFCs) include a large number of parameters such as boundary conditions, material properties, and numerous parameters used in sub-models for membrane transport, two-phase flow and electrochemistry. In order to successfully use a computational PEMFC model in design and optimization, it is important to identify critical parameters under a wide variety of operating conditions, such as relative humidity, current load, temperature, etc. Moreover, when experimental data is available in the form of polarization curves or local distribution of current and reactant/product species (e.g., O2, H2O concentrations), critical parameters can be estimated in order to enable the model to better fit the data. Sensitivity analysis and parameter estimation are typically performed using manual adjustment of parameters, which is also common in parameter studies. We present work to demonstrate a systematic approach based on using a widely available toolkit developed at Sandia called DAKOTA that supports many kinds of design studies, such as sensitivity analysis as well as optimization and uncertainty quantification. In the present work, we couple a multidimensional PEMFC model (which is being developed, tested and later validated in a joint effort by a team from Penn State Univ. and Sandia National Laboratories) with DAKOTA through the mapping of model parameters to system responses. Using this interface, we demonstrate the efficiency of performing simple parameter studies as well as identifying critical parameters using sensitivity analysis. Finally, we show examples of optimization and parameter estimation using the automated capability in DAKOTA.

Wang, Chao Yang (Penn State University, University Park, PA); Luo, Gang (Penn State University, University Park, PA); Jiang, Fangming (Penn State University, University Park, PA); Carnes, Brian; Chen, Ken Shuang

2010-05-01T23:59:59.000Z

283

Mobile Sensor Routing for Parameter Estimation of Distributed Systems Using the Parallel Tunneling Method  

Science Conference Proceedings (OSTI)

The paper deals with the problem of optimal path planning for a sensor network with mutliple mobile nodes, whose measurements are supposed to be primarily used to estimate unknown parameters of a system modelled by a partial differential equation. The ... Keywords: Distributed Parameter Systems, Optimum Experimental Design, Parallel Computing, Sensor Network, Tunneling Algorithm

Tomasz Zi?ba; Dariusz Uci?ski

2008-09-01T23:59:59.000Z

284

Research on operating parameters and energy consumption of cold store based on rough set theory  

Science Conference Proceedings (OSTI)

Rough set theory is applied to analyze the energy consumption of an industrial cold storage facility for the first time. The features of rough set theory in data extraction are analyzed. The operating parameters collected in a sample refrigerating plant ... Keywords: cold store, energy consumption, operating parameters, rough set

Jianyi Zhang; Ying Xu; Fei Chen

2009-08-01T23:59:59.000Z

285

Brief paper: Suboptimal control of linear stochastic multivariable systems with unknown parameters  

Science Conference Proceedings (OSTI)

An algorithm is proposed for suboptimal control of linear multivariable systems with unknown parameters and output noise covariances. This algorithm is based on the idea of explicitly separating the functions of identification, estimation and control. ... Keywords: Kalman filters, Multivariable control systems, canonical forms, controllability, discrete time systems, observability, parameter estimation, state estimation, state space methods, stochastic control

H. El-Sherief; N. K. Sinha

1982-01-01T23:59:59.000Z

286

Modeling and Parameter Optimization for an Articulating Electro Hydraulic Forest Machinery  

Science Conference Proceedings (OSTI)

This paper focuses on modeling and parameter estimation for the electro hydraulic actuation system of an articulated forestry machine. The linear graph method is implemented in deriving mathematical models of the swing, boom and stick subsystems. Actuation ... Keywords: Forest Machinery, Articulating Electro Hydraulic, Parameter Optimization

Wei-Zhan Guo; Liu-Jin Hao; Yu Ying; Wu-Jia Di

2010-01-01T23:59:59.000Z

287

Identification of Critical Parameters for Distribution Networks with DFIG and Dynamic loads  

E-Print Network (OSTI)

Identification of Critical Parameters for Distribution Networks with DFIG and Dynamic loads M. S of distribution network with Doubly Fed Induction Generator (DFIG) is presented in a different way where an analysis to investigate the critical parameters for distribution systems with dynamic loads where DFIGs

Pota, Himanshu Roy

288

Existence of Gompertz parameters with mortality deceleration rate and their asymptotic formulae for a large population  

Science Conference Proceedings (OSTI)

In this paper we provide an interval of existence of mortality rate parameters A and @a, and their asymptotic expressions in a Gompertz survival model with mortality deceleration rate, in the absence of age specific mortality data. Keywords: Asymptotic formulae, Deceleration rate, Gompertz parameter, Logistic frailty model, Maximum lifespan, Mortality rate, Survival function

M. Pitchaimani; T. Eakin

2007-12-01T23:59:59.000Z

289

Mercury Control Research: Effects of Fly Ash and Flue Gas Parameters on Mercury Speciation  

E-Print Network (OSTI)

and fly ash parameters on the oxidation of HgOin simulated flue gases containing hydrogen chloride (Hel-combustion region are unknown, and the major reaction pathways for Hg oxidation in combustion flue gases remain in the oxidation ofHgo in flue gases containingHC!. Thus, an important parameter that influences the oxidation of

Columbia University

290

Automatic Fuzzy Parameter Selection in Dynamic Fuzzy Voter for Safety Critical Systems  

Science Conference Proceedings (OSTI)

The main objective of this research paper is designing automatic fuzzy parameter selection based dynamic fuzzy voter for safety critical systems with limited system knowledge. Existing fuzzy voters for controlling safety critical systems and sensor fusion ... Keywords: Fuzzy Bandwidth, Fuzzy Voters, Safety Critical Systems, Statistical Parameters Systems, Triple Modular Redundant TMR, Weighted Average Voters

PhaniKumar Singamsetty; SeethaRamaiah Panchumarthy

2012-04-01T23:59:59.000Z

291

Thermodynamic Adjustment Parameters in the Betts–Miller Scheme of Convection  

Science Conference Proceedings (OSTI)

The sensitivity of the prediction of a monsoon depression to the adjustment parameters in a Betts–Miller scheme of deep convection is examined and an optimum parameter set is identified for the monsoon depression. For this purpose, a number of ...

S. S. Vaidya; S. S. Singh

1997-12-01T23:59:59.000Z

292

An instrument for the measurement and determination of chemical pulse column parameters  

DOE Patents (OSTI)

This invention pertains to an instrument for monitoring and measuring pneumatic driving force pulse parameters applied to chemical separation pulse columns obtains real time pulse frequency and root mean square amplitude values, calculates column inch values and compares these values against preset limits to alert column operators to the variations of pulse column operational parameters beyond desired limits. 2 figs.

Marchant, N.J.; Morgan, J.P.

1988-08-31T23:59:59.000Z

293

The Influence of Electrical Parameters of Double Fed Induction Generator on the Transient Voltage Stability  

Science Conference Proceedings (OSTI)

This paper describes the effect of electrical parameters of the double fed induction generator on the transient voltage stability of a DFIG to a simple grid; the DFIG model has been developed in the Matlab/simulink tool. The dynamic behavior of a wind ... Keywords: DFIG model, electrical parameter, voltage stability, small signal analysis

Hongmei Li; Qiulan Wan; Zhaoxing Ma

2010-06-01T23:59:59.000Z

294

Joint Identification of Stepper Motor Parameters and of Initial Encoder Offset  

E-Print Network (OSTI)

procedure to identify at the same time the electrical parameters of a permanent magnet stepper motor (PMSM an initilization procedure. Keywords: Permanent magnet stepper motor, synchronous motors, parameter identification, offset calibration, sliding modes. 1. INTRODUCTION Permanent Magnet Stepper Motors (PMSM's) are widely

Paris-Sud XI, Université de

295

Parameters Affecting Water Hammer Wave Attenuation, Shape by Anton Bergant1  

E-Print Network (OSTI)

(hydroelectric power plant, pumping system) and damage the system components; for example pipe displacementParameters Affecting Water Hammer Wave Attenuation, Shape and Timing by Anton Bergant1 and Arris.s.tijsseling@TUE.nl This paper investigates parameters that may affect water hammer wave attenuation, shape and timing. Possible

Eindhoven, Technische Universiteit

296

A Simplified Lumped Parameter Model for U-Tube Steam Generator  

Science Conference Proceedings (OSTI)

A simplified lumped parameter model for U-tube steam generator (UTSG) is presented, according to its working principle and the mass and energy conservation theory as well as the principle of thermal system dynamics. A three-element controller of water ... Keywords: Steam generator, Lumped parameter, Dynamic, Simplified

Zhang Yongsheng; Ma Yunyi

2010-06-01T23:59:59.000Z

297

An iterative stochastic ensemble method for parameter estimation of subsurface flow models  

Science Conference Proceedings (OSTI)

Parameter estimation for subsurface flow models is an essential step for maximizing the value of numerical simulations for future prediction and the development of effective control strategies. We propose the iterative stochastic ensemble method (ISEM) ... Keywords: Iterative stochastic ensemble method, Parameter estimation, Regularization, Subsurface flow models

Ahmed H. Elsheikh, Mary F. Wheeler, Ibrahim Hoteit

2013-06-01T23:59:59.000Z

298

Study on plasma parameters and dust charging in an electrostatically plugged multicusp plasma device  

Science Conference Proceedings (OSTI)

The effect of the electrostatic confinement potential on the charging of dust grains and its relationship with the plasma parameters has been studied in an electrostatically plugged multicusp dusty plasma device. Electrostatic plugging is implemented by biasing the electrically isolated magnetic multicusp channel walls. The experimental results show that voltage applied to the channel walls can be a controlling parameter for dust charging.

Kakati, B.; Kausik, S. S.; Saikia, B. K. [Centre of Plasma Physics, Institute for Plasma Research, Nazirakhat, Sonapur-782 402, Kamrup, Assam (India); Bandyopadhyay, M. [ITER-India, Institute for Plasma Research, Bhat, Gandhinagar- 382 428 (India)

2011-06-15T23:59:59.000Z

299

Bi-parameter incremental unknowns ADI iterative methods for elliptic problems  

Science Conference Proceedings (OSTI)

Bi-parameter incremental unknowns (IU) alternating directional implicit (ADI) iterative methods are proposed for solving elliptic problems. Condition numbers of the coefficient matrices for these iterative schemes are carefully estimated. Theoretical ... Keywords: Bi-parameter ADI iterative method, Condition number, Convergence analysis, Incremental unknowns

Aili Yang; Yujiang Wu; Yongqing Wu; Dawei Ren

2012-07-01T23:59:59.000Z

300

Evaluation of Planetary Boundary Layer Scheme Sensitivities for the Purpose of Parameter Estimation  

E-Print Network (OSTI)

for the parameters within the Asymmetrical Convective Model, version 2 (ACM2) planetary boundary layer (PBL) scheme of the simulations to these 10 particular ACM2 parameters within their plausible physical bounds. The most Appropriate treatment of vertical mixing is an essen- tial component of meteorological and air quality models

Note: This page contains sample records for the topic "tox parameter tox" 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

Monitoring of some functional parameters for an internal-combustion engine  

Science Conference Proceedings (OSTI)

This work presents the achievement of a monitoring, recording, processing and interpretation concept, at laboratory scale, of some functional parameters for a spark-ignition engine, based on an electronic equipment, which measures the values of 17 parameters ... Keywords: cylinder, internal-combustion engine, pressure, sensors, speed

Sorin Ra?iu; Gabriel Nicolae Popa; Vasile Alexa

2008-11-01T23:59:59.000Z

302

Molecular-level Thermodynamic and Kinetic Parameters for the Self-assembly of Apoferritin  

E-Print Network (OSTI)

Molecular-level Thermodynamic and Kinetic Parameters for the Self-assembly of Apoferritin Molecules at the molecular level the processes responsible for crystal growth. To evaluate the governing thermodynamic and the molecular-level thermodynamic and kinetic parameters determined here. We found that step growth velocity

Vekilov, Peter

303

Molecular Packing Parameter in Bolaamphiphile Solutions: Adjustment of Aggregate Morphology by Modifying the Solution Conditions  

E-Print Network (OSTI)

Molecular Packing Parameter in Bolaamphiphile Solutions: Adjustment of Aggregate Morphology of Chemistry and Molecular Engineering, and College of Life Science, Peking UniVersity, Beijing, 100871, People of molecular packing parameters in a bolaamphiphile solution was tested with experimental results. By modifying

Huang, Jianbin

304

Selective ensemble modeling parameters of mill load based on shell vibration signal  

Science Conference Proceedings (OSTI)

Load parameters inside the ball mill have direct relationships with the optimal operation of grinding process. This paper aims to develop a selective ensemble modeling approach to estimate these parameters. At first, the original vibration signal is ... Keywords: empirical mode decomposition, selective ensemble modeling, soft sensor, vibration frequency spectrum

Jian Tang; Li-Jie Zhao; Jia Long; Tian-you Chai; Wen Yu

2012-07-01T23:59:59.000Z

305

Some recent applications of distributed parameter systems theory-A survey  

Science Conference Proceedings (OSTI)

A survey of some recent applications of distributed parameter systems theory is presented. The practical areas discussed range from process control problems in an industrial plant to the identification, monitoring and control of air and water quality ... Keywords: Applications, control, distributed parameter systems, identification, optimal design, state estimation

W. H. Ray

1978-05-01T23:59:59.000Z

306

Sequential parameter estimation of time-varying non-Gaussian autoregressive processes  

Science Conference Proceedings (OSTI)

Parameter estimation of time-varying non-Gaussian autoregressive processes can be a highly nonlinear problem. The problem gets even more difficult if the functional form of the time variation of the process parameters is unknown. In this paper, we address ... Keywords: Gaussian mixtures, forgetting factors, particle filtering, sequential importance sampling

Petar M. Djuri?; Jayesh H. Kotecha; Fabien Esteve; Etienne Perret

2002-01-01T23:59:59.000Z

307

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

308

Parameter optimization of modern machining processes using teaching-learning-based optimization algorithm  

Science Conference Proceedings (OSTI)

Modern machining processes are now-a-days widely used by manufacturing industries in order to produce high quality precise and very complex products. These modern machining processes involve large number of input parameters which may affect the cost ... Keywords: Abrasive jet machining, Modern machining processes, Parameter optimization, TLBO algorithm, Ultrasonic machining, Wire electrical discharge machining

R. Venkata Rao; V. D. Kalyankar

2013-01-01T23:59:59.000Z

309

Parameter Study of Transport Processes with Catalytic Reactions in Intermediate Temperature Solid Oxide Fuel Cells  

Science Conference Proceedings (OSTI)

Solid oxide fuel cell is one of most promising types of fuel cells with advantages of high efficiencies, flexibility of usable fuel types. The performance of SOFC is strongly affected by cell overall parameters, e.g., temperature, pressure, reaction ... Keywords: parameter study, SOFC model, 3D CFD approach, refoming reactions

Chao Yang; Guogang Yang; Danting Yue; Jinliang Yuan

2010-12-01T23:59:59.000Z

310

Hybrid intelligent parameter estimation based on grey case-based reasoning for laminar cooling process  

Science Conference Proceedings (OSTI)

In this paper, a hybrid intelligent parameter estimation algorithm is proposed for predicting the strip temperature during laminar cooling process. The algorithm combines a hybrid genetic algorithm (HGA) with grey case-based reasoning (GCBR) in order ... Keywords: Grey case-based reasoning, Hybrid genetic algorithm, Laminar cooling process, Parameter estimation

Guishan Xing; Jinliang Ding; Tianyou Chai; Puya Afshar; Hong Wang

2012-03-01T23:59:59.000Z

311

A parameter estimation approach for non-linear systems biology models using spline approximation  

Science Conference Proceedings (OSTI)

Mathematical models for revealing the dynamics and interactions properties of biological systems play an important role in computational systems biology. The inference of model parameter values from time-course data can be considered as a "reverse engineering" ... Keywords: nonlinear programming, parameter estimation, spline

Choujun Zhan; Lam Fat Yeung

2010-08-01T23:59:59.000Z

312

Determining Key Model Parameters of Rapidly Intensifying Hurricane Guillermo (1997) Using the Ensemble Kalman Filter  

Science Conference Proceedings (OSTI)

In this work the authors determine key model parameters for rapidly intensifying Hurricane Guillermo (1997) using the ensemble Kalman filter (EnKF). The approach is to utilize the EnKF as a tool only to estimate the parameter values of the model ...

Humberto C. Godinez; Jon M. Reisner; Alexandre O. Fierro; Stephen R. Guimond; Jim Kao

2012-11-01T23:59:59.000Z

313

Estimation of the shape parameter k of the negative binomial distribution  

Science Conference Proceedings (OSTI)

Using approximate Bayesian methods, an estimator of the shape parameter of the negative binomial distribution is introduced. Most of the available estimators of this parameter, such as the method of moment and the maximum likelihood estimators (MME and ... Keywords: Bayes-like estimator, maximum likelihood estimator, method of moments estimator, negative binomial distribution

Mohammad F. Al-Saleh; Fatima K. Al-Batainah

2003-11-01T23:59:59.000Z

314

U-089:Apache Struts ParameterInterceptor() Flaw Lets Remote Users Execute  

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

9:Apache Struts ParameterInterceptor() Flaw Lets Remote Users 9:Apache Struts ParameterInterceptor() Flaw Lets Remote Users Execute Arbitrary Commands U-089:Apache Struts ParameterInterceptor() Flaw Lets Remote Users Execute Arbitrary Commands January 26, 2012 - 6:45am Addthis PROBLEM: Apache Struts ParameterInterceptor() Flaw Lets Remote Users Execute Arbitrary Commands PLATFORM: Struts 2.0.0 - Struts 2.3.1.1 ABSTRACT: A remote user can execute arbitrary code on the target system. reference LINKS: CVE-2011-3923 SecurityTracker Alert ID: 1026575 Apache Struts 2 Documentation S2-009 blog.o0o.nu IMPACT ASSESSMENT: High Discussion: A vulnerability was reported in Apache Struts. The vulnerability allows a malicious user to bypass all the protections (regex pattern, deny method invocation) built into the ParametersInterceptor, thus being able to inject

315

Determination of useful performance parameters for the ALR8(SI) plutonium pit container system  

E-Print Network (OSTI)

A thorough list of potentially useful performance parameters is generated, and a systematic method is designed to assess which parameters will provide the most significant or useful information about the long-term performance of the ALR8(SI). To generate a thorough list of performance parameters, an exhaustive literature search is performed in several key areas. These areas include the design specifications for the ALR8(SI) pit container system, as well as regulations and requirements for similar container systems used outside the weapons complex. Additionally, original parameters are identified which may also show potential usefulness if modeled or assessed. An assessment method is then created to determine, through a series of objective statements, which of the identified parameters shows pertinent, useful information about the long-term performance of the container if modeled or assessed. The results of this work will allow researchers currently modeling the performance of the ALR8(SI) to better focus their efforts. This work identifies a good starting point for researchers to begin their studies and can limit time and money wasted measuring parameters which will not provide useful information about the performance of this container system over the long-term. Additionally, this work provides an assessment method for researchers now and in the future to use when and if any new performance parameters are identified that show potentially useful information.

Pierce, Mark Alan

2000-01-01T23:59:59.000Z

316

Bayesian Analysis of QENS data: From parameter determination to model selection  

E-Print Network (OSTI)

The extraction of any physical information from quasielastic neutron scattering spectra is generally done by fitting a model to the data by means of chi-square minimization procedure. However, as pointed out by the pioneering work of D.S. Sivia et al., also another probabilistic approach based on Bayes theorem can be employed. In a nutshell, the main difference between the classical chi-square minimization and the Bayesian approach is the way of expressing the final results: In the first case, the result is a set of values of parameters with a symmetric error and a figure of merit such as chi-square, whereas in the second case the results are presented as probability distribution functions (PDF) of both, parameters and merit figure. In this contribution, we demonstrate how final PDFs are obtained by exploring all possible combinations of parameters that are compatible with the experimental error. Three advantages of this method will be emphasized: First, correlations between parameters are automatically taken into account, which implies, for example, that parameter errors are correctly calculated, correlations show up in a natural way and ill defined parameters are immediately recognized from their PDF. Second, it is possible to calculate the likelihood of a determined physical model, and therefore to select the one among many that fits the data best with a minimal number of parameters, in a correctly defined probabilistic way.

L. C. Pardo; M. Rovira-Esteva; S. Busch; M. D. Ruiz-Martin; J. Ll. Tamarit; T. Unruh

2009-07-21T23:59:59.000Z

317

Equilibrium Parameters  

Science Conference Proceedings (OSTI)

Table 3   Electrode coating formulations of selected SMAW electrodes...ore Calcium carbonate Complex silicates Fluorspar Ferroalloys Cellulosic 6010 20â??60 10â??50 15â??30 0â??15 5â??10 â?¦ â?¦ â?¦ â?¦ â?¦ â?¦ Cellulose promotes gas shielding in the arc region.

318

Furnace Parameters  

Science Conference Proceedings (OSTI)

Table 5   Inclusion levels in commercially available glass products...>0.05 >0.002 3000 500 >0.8 >0.031 20 3 Wool fiberglass >0.2 >0.008 10 4 2000 Textile fiber glass >0.007 >0.0003 0â??900 0â??160 Solid inclusions Float architectural â?¦ â?¦ 0.001 0.0002 Containers >0.03 >0.001 0.06 0.01 Glass-ceramic ovenware >0.5 >0.020 1 0.2 (a) dm, decimeter...

319

Benchmark 3-Flavor Pattern and Small Universal Flavor-Electroweak Parameter  

E-Print Network (OSTI)

The electroweak theory contains too many empirical parameters. Most of them are related to the flavor part of particle physics. In this paper we discuss a relevant simple idea: the complicated system of actual dimensionless, small versus large, quantities in elementary particle flavor phenomenology is small deviated from an explicitly defined benchmark flavor pattern with no tuning parameters. One small empirical universal dimensionless parameter measures this deviation. Its possible physical connections are discussed. As inferences, quasi-degenerate neutrino type with mass scale m = 0.16-0.18 eV, neutrino and quark mixing matrices, large neutrino oscillation 3-flavor hierarchy and quark-neutrino complementarity are predicted.

E. M. Lipmanov

2008-12-08T23:59:59.000Z

320

The lateral shower age parameter as an estimator of chemical composition  

E-Print Network (OSTI)

We explore the feasibility of estimating primary cosmic ray composition at ultra high energies from the study of lateral age parameter of Extensive Air Showers (EAS) at ground level. Using different types of lateral distribution functions, we fit the particle density of simulated EAS to find the lateral age parameter. We discuss the chemical composition calculating the merit factor for each parameter distribution. The analysis considers three different primary particles (proton, iron and gamma), four different zenith angles (0{\\deg}, 15{\\deg}, 30{\\deg} and 45{\\deg}) and three primary energies (10^{17.25} eV, 10^{17.50} eV and 10^{17.75} eV).

A. Tapia; D. Melo; F. Sánchez; A. Sedoski Croce; A. Etchegoyen; J. M. Figueira; R. F. Gamarra; B. García; N. González; M. Josebachuili; D. Ravignani; I. Sidelnik; B. Wundheiler

2013-09-13T23:59:59.000Z

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


321

Variations in environmental tritium doses due to meteorological data averaging and uncertainties in pathway model parameters  

Science Conference Proceedings (OSTI)

The objectives of this research are: (1) to calculate and compare off site doses from atmospheric tritium releases at the Savannah River Site using monthly versus 5 year meteorological data and annual source terms, including additional seasonal and site specific parameters not included in present annual assessments; and (2) to calculate the range of the above dose estimates based on distributions in model parameters given by uncertainty estimates found in the literature. Consideration will be given to the sensitivity of parameters given in former studies.

Kock, A.

1996-05-01T23:59:59.000Z

322

Information content in the halo-model dark-matter power spectrum II: Multiple cosmological parameters  

E-Print Network (OSTI)

We investigate the cosmological Fisher information in the non-linear dark-matter power spectrum in the context of the halo model. We find that there is a plateau in information content on translinear scales which is generic to all cosmological parameters we tried. There is a rise in information on smaller scales, but we find that it is quite degenerate among different cosmological parameters (except, perhaps, the tilt). This suggests that it could be difficult to constrain cosmological parameters using the non-linear regime of the dark-matter power spectrum. We suggest ways to get around this problem, such as removing the largest haloes from consideration in survey analysis.

Mark C. Neyrinck; István Szapudi

2006-10-06T23:59:59.000Z

323

CIVILIAN POWER REACTOR PROGRAM. PART III. CORE-PARAMETER STUDIES FOR SELECTED REACTOR TYPES  

SciTech Connect

A report is presented to provide a tool for evaluating the relative economic incentives for changing reactor core parameters. The cost relations are shown in terms of differential cost in lieu of total cost. A total cost for each reactor described is included so that power costs for a specified set of parameters can be obtained. A description is also included concerning 5 reactor types considered along with a discussion of the effects on power costs of varying the significant core parameters. A listing of basic references is given. (J.R.D.)

Atomic Energy Commission, Washington, D.C.; Jackson and Moreland, Inc., Boston

1959-01-01T23:59:59.000Z

324

An Assessment of Areal Coverage of Severe Weather Parameters for Severe Weather Outbreak Diagnosis  

Science Conference Proceedings (OSTI)

The areal extent of severe weather parameters favorable for significant severe weather is evaluated as a means of identifying major severe weather outbreaks. The first areal coverage method uses kernel density estimation (KDE) to identify severe ...

Chad M. Shafer; Andrew E. Mercer; Michael B. Richman; Lance M. Leslie; Charles A. Doswell III

2012-08-01T23:59:59.000Z

325

Local Relationships between United States West Coast Precipitation and Monthly Mean Circulation Parameters  

Science Conference Proceedings (OSTI)

Monthly accumulations of area-averaged precipitation along the West Coast of the United States are related to estimates of local circulation parameters. The annual cycle as well as anomalous components of these quantities are compared. A strong ...

Daniel R. Cayan; John O. Roads

1984-06-01T23:59:59.000Z

326

Weighted Time Warping for Temporal Segmentation of Multi-Parameter Physiological Signals  

E-Print Network (OSTI)

We present a novel approach to segmenting a quasiperiodic multi-parameter physiological signal in the presence of noise and transient corruption. We use Weighted Time Warping (WTW), to combine the partially correlated ...

Ganeshapillai, Gartheeban

327

Speed binning aware design methodology to improve profit under parameter variations  

Science Conference Proceedings (OSTI)

Designing high-performance systems with high yield under parameter variations has raised serious design challenges in nanometer technologies. In this paper, we propose a profit-aware yield model, based on which we present a statistical design methodology ...

Animesh Datta; Swarup Bhunia; Jung Hwan Choi; Saibal Mukhopadhyay; Kaushik Roy

2006-01-01T23:59:59.000Z

328

Interactions between Simulated Tropical Cyclones and an Environment with a Variable Coriolis Parameter  

Science Conference Proceedings (OSTI)

Numerical simulations of tropical cyclones are performed to examine the effects of a variable Coriolis parameter on the structure and intensity of hurricanes. The simulations are performed using the nonhydrostatic fifth-generation Pennsylvania ...

Elizabeth A. Ritchie; William M. Frank

2007-05-01T23:59:59.000Z

329

Relationship between ERS Scatterometer Measurement and Integrated Wind and Wave Parameters  

Science Conference Proceedings (OSTI)

Potential effects of environmental parameters such as sea state or atmospheric boundary layer stability on the normalized radar cross section (NRCS) measured by spaceborne sensors have been investigated for a long time. Using neural networks and ...

Y. Quilfen; B. Chapron; F. Collard; D. Vandemark

2004-02-01T23:59:59.000Z

330

U-163: PHP Command Parameter Bug Lets Remote Users Obtain Potentially  

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

3: PHP Command Parameter Bug Lets Remote Users Obtain 3: PHP Command Parameter Bug Lets Remote Users Obtain Potentially Sensitive Information and Execute Arbitrary Code U-163: PHP Command Parameter Bug Lets Remote Users Obtain Potentially Sensitive Information and Execute Arbitrary Code May 7, 2012 - 7:00am Addthis PROBLEM: PHP Command Parameter Bug Lets Remote Users Obtain Potentially Sensitive Information and Execute Arbitrary Code PLATFORM: Prior to 5.3.12 and 5.4.2 ABSTRACT: A vulnerability was reported in PHP. A remote user can obtain potentially sensitive information. A remote user can execute arbitrary code on the target system. reference LINKS: SecurityTracker Alert ID: 1027022 CVE-2012-1823 CVE-2012-2311 IMPACT ASSESSMENT: High Discussion: A remote user can submit a specially crafted request containing a command

331

V-162: Apache Struts "ParameterInterceptor" Security Bypass Vulnerability |  

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

2: Apache Struts "ParameterInterceptor" Security Bypass 2: Apache Struts "ParameterInterceptor" Security Bypass Vulnerability V-162: Apache Struts "ParameterInterceptor" Security Bypass Vulnerability May 23, 2013 - 6:00am Addthis PROBLEM: A vulnerability has been reported in Apache Struts PLATFORM: The vulnerability is reported in versions prior to 2.3.14.1 ABSTRACT: A vulnerability has been reported in Apache Struts, which can be exploited by malicious people to bypass certain security restrictions. REFERENCE LINKS: Secunia Advisory SA53495 Apache Struts Advisory S2-012 Apache Struts Advisory S2-013 CVE-2013-1965 CVE-2013-1966 IMPACT ASSESSMENT: High DISCUSSION: A request that included a specially crafted request parameter could be used to inject arbitrary OGNL code into the stack, afterward used as request

332

Early Site Permit Demonstration Program: Plant parameters envelope report. Volume 1  

Science Conference Proceedings (OSTI)

The Early Site Permit (ESP) Demonstration Program is the nuclear industry`s initiative for piloting the early resolution of siting-related issues before the detailed design proceedings of the combined operating license review. The ESP Demonstration Program consists of three phases. The plant parameters envelopes task is part of Phase 1, which addresses the generic review of applicable federal regulations and develops criteria for safety and environmental assessment of potential sites. The plant parameters envelopes identify parameters that characterize the interface between an ALWR design and a potential site, and quantify the interface through values selected from the Utility Requirements Documents, vendor design information, or engineering assessments. When augmented with site-specific information, the plant parameters envelopes provide sufficient information to allow ESPs to be granted based on individual ALWR design information or enveloping design information for the evolutionary, passive, or generic ALWR plants. This document is expected to become a living document when used by future applicants.

Not Available

1993-03-01T23:59:59.000Z

333

Radiation Budget Parameters at the Top of the Earth's Atmosphere from METEOSAT Data  

Science Conference Proceedings (OSTI)

This paper presents a method to derive radiation budget parameters (albedo and emitted longwave flux) at the top of the atmosphere from the three-band METEOSAT images. Model calculations are used to correct for the anisotropic radiance ...

Marianne Gube

1982-12-01T23:59:59.000Z

334

Development of a China Dataset of Soil Hydraulic Parameters Using Pedotransfer Functions for Land Surface Modeling  

Science Conference Proceedings (OSTI)

The objective of this study is to develop a dataset of the soil hydraulic parameters associated with two empirical soil functions (i.e., a water retention curve and hydraulic conductivity) using multiple pedotransfer functions (PTFs). The dataset ...

Yongjiu Dai; Wei Shangguan; Qingyun Duan; Baoyuan Liu; Suhua Fu; Guoyue Niu

2013-06-01T23:59:59.000Z

335

Analysis of site parameters affecting natural attenuation in saturated soil. Master's thesis  

Science Conference Proceedings (OSTI)

This study investigated the natural attenuation mechanisms and some of the parameters affecting those mechanisms in the saturated zone. A literature search revealed numerous studies of various attenuation and the associated parameters. Much of the literature emphasized biodegradation as the most promising attenuation mechanism. BIOPLUME II(TM), a fate and transport model, was used to simulate the fate and transport of contaminant plume. The effects of the model parameters were investigated by observing the distance a contaminant plume was expected to migrate over a fifty year period. The investigation was limited by the model which excludes chemical reactions and some physical and physiochemical reactions. The model simulations indicated that parameters which exhibited significant influence on natural attenuation include hydraulic conductivity, reaeration, and coefficient of anaerobic biodegradation.

Potts, W.H.

1993-09-01T23:59:59.000Z

336

Aggregation of U.S. Population Centers Using Climate Parameters Related to Building Energy Use  

Science Conference Proceedings (OSTI)

A technique for aggregating population centers into groups based on selected climate parameters is presented. Climate information on the 125 largest Standard Metropolitan Statistical Areas (SMSAs) in the United States is used to assign each SMSA ...

Brandt Andersson; William L. Carroll; Marlo R. Martin

1986-05-01T23:59:59.000Z

337

Mining geophysical parameters through decision-tree analysis to determine correlation with tropical cyclone development  

Science Conference Proceedings (OSTI)

Correlations between geophysical parameters and tropical cyclones are essential in understanding and predicting the formation of tropical cyclones. Previous studies show that sea surface temperature and vertical wind shear significantly influence the ... Keywords: Data mining, Hurricane, Natural disaster, Prediction

Wenwen Li; Chaowei Yang; Donglian Sun

2009-02-01T23:59:59.000Z

338

Wind Direction Dependence of Atmospheric Boundary Layer Turbulence Parameters in the Urban Roughness Sublayer  

Science Conference Proceedings (OSTI)

A variety of atmospheric boundary layer parameters are examined as a function of wind direction in both urban and suburban settings in Oklahoma City, Oklahoma, derived from measurements during the Joint Urban 2003 field campaign. Heterogeneous ...

Cheryl Klipp

2007-12-01T23:59:59.000Z

339

Optimal Determination of Parameters for Gamma-Type Drop Size Distributions Based on Moments  

Science Conference Proceedings (OSTI)

Measured raindrop size distributions are often approximated by analytical functions. The parameters determining such functions are usually derived from measured data. This procedure can suffer from various uncertainties. The most important of ...

Jan Handwerker; Winfried Straub

2011-04-01T23:59:59.000Z

340

Large-Scale Environmental Parameters Associated with Tropical Cyclone Formations in the Western North Pacific  

Science Conference Proceedings (OSTI)

The local environmental conditions associated with 405 tropical cyclone (TC) formations in the western North Pacific during 1990–2001 are examined in this study. Six large-scale parameters are obtained and computed from the NCEP reanalyses with ...

Kevin K. W. Cheung

2004-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "tox parameter tox" 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

Transferable tight-binding parameters: An application to Ni and Ni-Al alloys  

Science Conference Proceedings (OSTI)

Two approaches for obtaining tight-binding parameters for metallic alloys are compared and contrasted with special regard for the application to large scale simulations such as may occur in tight-binding molecular dynamics studies.

Sluiter, M.H.F.; Singh, P.P.

1993-07-01T23:59:59.000Z

342

Stability Parameters and Wind-Stress Coefficients under Various Atmospheric Conditions  

Science Conference Proceedings (OSTI)

Stability parameters and wind-stress coefficients under various atmospheric conditions are related to wind velocity and air-sea temperature difference. Readily applicable formulae, without iterative computations, of wind-stress coefficients under ...

Jin Wu

1986-06-01T23:59:59.000Z

343

Physical parameters of the Small Magellanic Cloud RR Lyrae stars and the distance scale  

E-Print Network (OSTI)

We present a careful and detailed light curve analysis of RR Lyrae stars in the Small Magellanic Cloud (SMC) discovered by the Optical Gravitational Lensing Experiment (OGLE) project. Out of 536 single mode RR Lyrae stars selected from the database, we have investigated the physical properties of 335 `normal looking' RRab stars and 17 RRc stars that have good quality photometric light curves. We have also been able to estimate the distance modulus of the cloud which is in good agreement with those determined from other independent methods. The Fourier decomposition method has been used to study the basic properties of these variables. Accurate Fourier decomposition parameters of 536 RR Lyrae stars in the OGLE-II database are computed. Empirical relations between the Fourier parameters and some physical parameters of these variables have been used to estimate the physical parameters for the stars from the Fourier analysis. Further, the Fourier decomposition of the light curves of the SMC RR Lyrae stars yields ...

Deb, Sukanta

2009-01-01T23:59:59.000Z

344

U-089:Apache Struts ParameterInterceptor() Flaw Lets Remote Users...  

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

ParametersInterceptor, thus being able to inject a malicious expression in any exposed string variable for further evaluation. The code will run with the privileges of the target...

345

The Estimation of Rainfall Parameters Using Spaceborne and Airborne Nadir-Pointing Radars  

Science Conference Proceedings (OSTI)

When pointed toward ground, spaceborne and airborne radars must use several frequencies in order to estimate rainfall parameters. It is now well known, for example, that the differences between specific attenuations at different frequencies ...

A. R. Jameson

1994-02-01T23:59:59.000Z

346

A New Approach to Estimate Directional Spreading Parameters of a Cosine-2s Model  

Science Conference Proceedings (OSTI)

For accurate and consistent estimates of the directional spreading parameter and mean wave direction of directional seas based on a cosine-2s directional spreading model, a new approach is proposed, employing a maximum likelihood method (MLM) to ...

Shaosong Zhang; Jun Zhang

2006-02-01T23:59:59.000Z

347

An Improved Land Surface Emissivity Parameter for Land Surface Models Using Global Remote Sensing Observations  

Science Conference Proceedings (OSTI)

Because land surface emissivity (?) has not been reliably measured, global climate model (GCM) land surface schemes conventionally set this parameter as simply constant, for example, 1 as in the National Oceanic and Atmospheric Administration (...

Menglin Jin; Shunlin Liang

2006-06-01T23:59:59.000Z

348

A Simple Parameterization Scheme for Joint Statistics of Cloud Field Morphology and Physical Parameters  

Science Conference Proceedings (OSTI)

A simple parameterization scheme for the joint statistics of cloud field morphology and other cloud parameters is discussed. The statistics of the cloud field morphology an obtained from the NOAA-9 AVHRR using the “Hit or Miss” image ...

T. J. Davis

1990-08-01T23:59:59.000Z

349

The Relation between the Area-Average Rain Rate and the Rain Cell Size Distribution Parameters  

Science Conference Proceedings (OSTI)

A review of the literature on the rain cell diameter distribution (RCDD) is first presented. It shows that RCDD, for a given rain-rate threshold ?, is accurately described by an exponential distribution with an exponential parameter ? weakly ...

Henri Sauvageot; Frédéric Mesnard; Ricardo S. Tenório

1999-01-01T23:59:59.000Z

350

Raindrop Size Distribution and Radar Parameters in Coastal Tropical Rain Systems of Northeastern Brazil  

Science Conference Proceedings (OSTI)

A dataset on raindrop size distribution (DSD) gathered in a coastal site of the Alagoas state in northeastern Brazil is used to analyze some differences between continental and maritime rainfall parameters. The dataset is divided into two subsets. ...

Ricardo Sarmento Tenório; Marcia Cristina da Silva Moraes; Henri Sauvageot

2012-11-01T23:59:59.000Z

351

Distribution of Rainfall Parameters near the Coasts of France and Senegal  

Science Conference Proceedings (OSTI)

Because of a lack of data, the structural characteristics of rain fields over the sea are poorly documented. Coastal radars offer an opportunity to observe the distribution of rain parameters at the land–sea transition. In this study, two ...

Armand Nzeukou; Henri Sauvageot

2002-01-01T23:59:59.000Z

352

Forecast constraints on cosmic string parameters from gravitational wave direct detection experiments  

E-Print Network (OSTI)

Gravitational waves (GWs) are one of the key signatures of cosmic strings. If GWs from cosmic strings are detected in future experiments, not only their existence can be confirmed but also their properties might be probed. In this paper, we study the determination of cosmic string parameters through direct detection of GW signatures in future ground-based GW experiments. We consider two types of GWs, bursts and the stochastic GW background, which provide us with different information about cosmic string properties. Performing the Fisher matrix calculation on the cosmic string parameters, such as parameters governing the string tension $G\\mu$ and initial loop size $\\alpha$ and the reconnection probability $p$, we find that the two different types of GW can break degeneracies in some of these parameters and provide better constraints than those from each measurement.

Sachiko Kuroyanagi; Koichi Miyamoto; Toyokazu Sekiguchi; Keitaro Takahashi; Joseph Silk

2012-02-14T23:59:59.000Z

353

Variability of Updraft and Downdraft Characteristics in a Large Parameter Space Study of Convective Storms  

Science Conference Proceedings (OSTI)

Over 200 convective storm simulations are analyzed to examine the variability in storm vertical velocity and updraft area characteristics as a function of basic environmental parameters. While it is known that bulk properties of the troposphere ...

Cody Kirkpatrick; Eugene W. McCaul Jr.; Charles Cohen

2009-05-01T23:59:59.000Z

354

Study on flow parameters optimisation for marine gas turbine intercooler system based on simulation experiment  

Science Conference Proceedings (OSTI)

The thermodynamic calculation software of Intercooled-Cycle gas turbine was developed to observe the impacts that the environmental parameters and cold degrees of intercooler produce quantitatively on this marine engine performance. And then, the mathematical ...

Yu-long Ying; Yun-peng Cao; Shu-ying Li; Zhi-tao Wang

2013-06-01T23:59:59.000Z

355

A Global Database of Land Surface Parameters at 1-km Resolution in Meteorological and Climate Models  

Science Conference Proceedings (OSTI)

Ecoclimap, a new complete surface parameter global dataset at a 1-km resolution, is presented. It is intended to be used to initialize the soil–vegetation–atmosphere transfer schemes (SVATs) in meteorological and climate models (at all horizontal ...

Valéry Masson; Jean-Louis Champeaux; Fabrice Chauvin; Christelle Meriguet; Roselyne Lacaze

2003-05-01T23:59:59.000Z

356

One-parameter semigroups of analytic functions, fixed points and the Koenigs function  

Science Conference Proceedings (OSTI)

Analogues of the Berkson-Porta formula for the infinitesimal generator of a one-parameter semigroup of holomorphic maps of the unit disc into itself are obtained in the case when, along with a Denjoy-Wolff point, there also exist other fixed points. With each one-parameter semigroup a so-called Koenigs function is associated, which is a solution, common for all elements of the one-parameter semigroup, of a certain functional equation (Schroeder's equation in the case of an interior Denjoy-Wolff point and Abel's equation in the case of a boundary Denjoy-Wolff point). A parametric representation for classes of Koenigs functions that takes account of the Denjoy-Wolff point and other fixed points of the maps in the one-parameter semigroup is presented. Bibliography: 19 titles.

Goryainov, Victor V; Kudryavtseva, Olga S [Volzhsky Institute of Humanities, Volgograd Region, Volzhsky (Russian Federation)

2011-07-31T23:59:59.000Z

357

Simulating the effects of structural parameters on the hydraulic performances of venturi tube  

Science Conference Proceedings (OSTI)

The effects of Venturi structural parameters on its hydraulic performance were studied, which provided theoretical basis for the design of Venturi injector. With an inlet diameter of 50 mm, based on the method of computational fluid dynamics (CFD), the ...

Yanqi Sun; Wenquan Niu

2012-01-01T23:59:59.000Z

358

Analysis of Soil Moisture from Near-Surface Parameters: A Feasibility Study  

Science Conference Proceedings (OSTI)

The main purpose of this paper is to demonstrate that it is possible to estimate soil moisture from the evolution of atmospheric parameters near the surface (temperature and relative humidity) if a realistic surface transfer model is available. ...

Jean-François Mahfouf

1991-11-01T23:59:59.000Z

359

Parameter search in an agent-based model of pedestrian movement in retail environments  

E-Print Network (OSTI)

Parameter search in an agent-based model of pedestrian movement in retail environments is part of a research effort by data-driven architecture in the Cognitive Machine Group at the MIT Media Lab. The approach pursued in ...

Jitapunkul, Thananat

2010-01-01T23:59:59.000Z

360

Estimation of Meteorological Parameters for Air Quality Management: Coupling of Sodar Data with Simple Numerical Models  

Science Conference Proceedings (OSTI)

In this paper an attempt is made to couple sodar data and simple numerical models to calculate the wind field and the boundary layer parameters that are relevant to air quality monitoring and studies. For this purpose, a diagnostic, mass-...

Dimitrios Melas; Giulia Abbate; Dias Haralampopoulos; Alexandros Kelesidis

2000-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "tox parameter tox" 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

Periodic windows distribution resulting from homoclinic bifurcations in the two-parameter space  

E-Print Network (OSTI)

Periodic solution parameters, in chaotic dynamical systems, form periodic windows with characteristic distribution in two-parameter spaces. Recently, general properties of this organization have been reported, but a theoretical explanation for that remains unknown. Here, for the first time we associate the distribution of these periodic windows with scaling laws based in fundamental dynamic properties. For the R\\"ossler system, we present a new scenery of periodic windows composed by multiple spirals, continuously connected, converging to different points along of a homoclinic bifurcation set. We show that the bi-dimensional distribution of these periodic windows unexpectedly follows scales given by the one-parameter homoclinic theory. Our result is a strong evidence that, close to homoclinic bifurcations, periodic windows are aligned in the two-parameter space.

Rene Orlando Medrano-T.; Iberê Luis Caldas

2010-12-10T23:59:59.000Z

362

Bayesian parameter estimation in the second LISA Pathfinder Mock Data Challenge  

E-Print Network (OSTI)

A main scientific output of the LISA Pathfinder mission is to provide a noise model that can be extended to the future gravitational wave observatory, LISA. The success of the mission depends thus upon a deep understanding of the instrument, especially the ability to correctly determine the parameters of the underlying noise model. In this work we estimate the parameters of a simplified model of the LISA Technology Package (LTP) instrument. We describe the LTP by means of a closed-loop model that is used to generate the data, both injected signals and noise. Then, parameters are estimated using a Bayesian framework and it is shown that this method reaches the optimal attainable error, the Cramer-Rao bound. We also address an important issue for the mission: how to efficiently combine the results of different experiments to obtain a unique set of parameters describing the instrument.

M. Nofrarias; C. Röver; M. Hewitson; A. Monsky; G. Heinzel; K. Danzmann; L. Ferraioli; M. Hueller; S. Vitale

2010-08-31T23:59:59.000Z

363

Variability of Microphysical Parameters in High-Altitude Ice Clouds: Results of the Remote Sensing Method  

Science Conference Proceedings (OSTI)

The remote sensing method for retrieving vertical profiles of microphysical parameters in ice clouds from ground-based measurements taken by the Doppler radar and IR radiometer was applied to several cloud cases observed during different field ...

Sergey Y. Matrosov

1997-06-01T23:59:59.000Z

364

Estimation of Cloud Physical Parameters from Airborne Solar Spectral Reflectance Measurements for Stratocumulus Clouds  

Science Conference Proceedings (OSTI)

A new method is proposed to retrieve various cloud physical parameters of water clouds from the solar-flux reflectances at four wavelengths measured by using the airborne Multi-channel Cloud Pyranometer (MCP) system. The MCP system was designed ...

Shoji Asano; Masataka Shiobara; Akihiro Uchiyama

1995-10-01T23:59:59.000Z

365

Equations for Estimating the Similarity Parameter from Radiation Measurements within Weakly Absorbing Optically Thick Clouds  

Science Conference Proceedings (OSTI)

Series expansions are derived for estimating the similarity parameter, which is a combination of the single-scattering albedo and asymmetry factor, from radiance measurement deep in the interior of a weary absorbing cloud. One expansion requires ...

T. Duracz; N. J. McCormick

1986-03-01T23:59:59.000Z

366

Additional Field Verification of Convective Scaling for the Lateral Dispersion Parameter  

Science Conference Proceedings (OSTI)

The results of a series of diffusion trials over the heterogeneous surface of the Canadian Precambrian Shield provide additional support for the convective scaling of the lateral dispersion parameter, ?y. The data indicate that under convective ...

S. K. Sakiyama; P. A. Davis

1988-07-01T23:59:59.000Z

367

Insulating fault diagnosis of XLPE power cables using multi-parameter based on artificial neural networks  

Science Conference Proceedings (OSTI)

An online monitoring system of XLPE power cables was introduced in the research at first. It could detect the parameters, including partial discharge, dielectric loss, and central insulation resistance and sheathing resistance. The BP artificial neural ...

Xiaolin Chen; Yonghong Cheng; Zhelei Zhu; Bo Yue; Xiaojun Xie

2005-05-01T23:59:59.000Z

368

The Use of the Weibull Three-Parameter Model for Estimating Mean Wind Power Densities  

Science Conference Proceedings (OSTI)

The Weibull three-parameter model is discussed for estimation of mean wind power densities. This probability density function is a generalization of a number of more conventional density functions. Using wind speed observations, it is shown that ...

L. Van Der Auwera; F. De Meyer; L. M. Malet

1980-07-01T23:59:59.000Z

369

Evaluation of model parameter convergence when using data assimilation for soil moisture estimation  

Science Conference Proceedings (OSTI)

Data assimilation (DA) methods are commonly used for finding a compromise between imperfect observations and uncertain model predictions. The estimation of model states and parameters has been widely recognized, but the convergence of estimated ...

Gift Dumedah; Jeffrey P. Walker

370

Impact of Surface Parameter Uncertainties within the Canadian Regional Ensemble Prediction System  

Science Conference Proceedings (OSTI)

The aim of this study is to assess the impact of uncertainties in surface parameter and initial conditions on numerical prediction with the Canadian Regional Ensemble Prediction System (REPS). As part of this study, the Canadian version of the ...

Christophe Lavaysse; Marco Carrera; Stéphane Bélair; Normand Gagnon; Ronald Frenette; Martin Charron; M. K. Yau

2013-05-01T23:59:59.000Z

371

The Bias in Moment Estimators for Parameters of Drop Size Distribution Functions: Sampling from Exponential Distributions  

Science Conference Proceedings (OSTI)

The moment estimators frequently used to estimate parameters for drop size distribution (DSD) functions being “fitted” to observed raindrop size distributions are biased. Consequently, the fitted functions often do not represent well either the ...

Paul L. Smith; Donna V. Kliche

2005-08-01T23:59:59.000Z

372

Diagnosing the Intercept Parameter for Exponential Raindrop Size Distribution Based on Video Disdrometer Observations: Model Development  

Science Conference Proceedings (OSTI)

The exponential distribution N(D) = N0 exp(??D) with a fixed intercept parameter N0 is most commonly used to represent raindrop size distribution (DSD) in rainfall estimation and in single-moment bulk microphysics parameterization schemes. ...

Guifu Zhang; Ming Xue; Qing Cao; Daniel Dawson

2008-11-01T23:59:59.000Z

373

Errors in Estimating Raindrop Size Distribution Parameters Employing Disdrometer and Simulated Raindrop Spectra  

Science Conference Proceedings (OSTI)

There have been debates and differences of opinion over the validity of using drop size distribution (DSD) models to characterize precipitation microphysics and to retrieve DSD parameters from multiparameter radar measurements. In this paper, ...

Qing Cao; Guifu Zhang

2009-02-01T23:59:59.000Z

374

Observed Relationships between Arctic Longwave Cloud Forcing and Cloud Parameters Using a Neural Network  

Science Conference Proceedings (OSTI)

A neural network technique is used to quantify relationships involved in cloud–radiation feedbacks based on observations from the Surface Heat Budget of the Arctic (SHEBA) project. Sensitivities of longwave cloud forcing (CFL) to cloud parameters ...

Yonghua Chen; Filipe Aires; Jennifer A. Francis; James R. Miller

2006-08-01T23:59:59.000Z

375

Parameter Estimation for Marked Point Processes. Application to Object Extraction from Remote Sensing Images  

Science Conference Proceedings (OSTI)

This communication addresses the problem of estimating the parameters of a family of marked point processes. These processes are of interest in extraction of object networks from remote sensing images. They are defined from a combination of several energy ...

Florent Chatelain; Xavier Descombes; Josiane Zerubia

2009-08-01T23:59:59.000Z

376

A STUDY ON THE CHOICE OF PARAMETERS FOR A HIGH ENERGY ELECTRON RING ACCELERATOR  

SciTech Connect

The production of high energy (multi-GeV) proton beams by an electron ring accelerator is considered. Both the final energy and intensity of the proton beam depend on the choice of parameters for the electron ring. Possible sets of parameters, consistent with all the known requirements of ring stability, and which optimize the energy and (or) the intensity of the proton beam, are presented.

Bovet, C.; Pellegrini, C.

1970-06-26T23:59:59.000Z

377

Parameter selection for suppressed fuzzy c-means with an application to MRI segmentation  

Science Conference Proceedings (OSTI)

This paper presents an algorithm, called the modified suppressed fuzzy c-means (MS-FCM), that simultaneously performs clustering and parameter selection for the suppressed fuzzy c-means (S-FCM) algorithm proposed by [Fan, J.L., Zhen, W.Z., Xie, W.X., ... Keywords: Fuzzy c-means, Fuzzy clustering, Magnetic resonance image segmentation, Parameter selection, Suppressed fuzzy c-means

Wen-Liang Hung; Miin-Shen Yang; De-Hua Chen

2006-04-01T23:59:59.000Z

378

Selection of a representative set of parameters for robust ordinal regression outranking methods  

Science Conference Proceedings (OSTI)

We introduce the concept of a representative set of parameters for multiple criteria outranking methods: ELECTRE^G^K^M^S and PROMETHEE^G^K^S which apply the principle of robust ordinal regression. We exploit the necessary and the possible results provided ... Keywords: ELECTRE-like method, Outranking relation, PROMETHEE-like method, Representative preference model, Representative set of parameters, Robust ordinal regression

Mi?osz Kadzi?ski; Salvatore Greco; Roman S?owi?ski

2012-11-01T23:59:59.000Z

379

Optimization of Operating Parameters for Minimum Mechanical Specific Energy in Drilling  

SciTech Connect

Efficiency in drilling is measured by Mechanical Specific Energy (MSE). MSE is the measure of the amount of energy input required to remove a unit volume of rock, expressed in units of energy input divided by volume removed. It can be expressed mathematically in terms of controllable parameters; Weight on Bit, Torque, Rate of Penetration, and RPM. It is well documented that minimizing MSE by optimizing controllable factors results in maximum Rate of Penetration. Current methods for computing MSE make it possible to minimize MSE in the field only through a trial-and-error process. This work makes it possible to compute the optimum drilling parameters that result in minimum MSE. The parameters that have been traditionally used to compute MSE are interdependent. Mathematical relationships between the parameters were established, and the conventional MSE equation was rewritten in terms of a single parameter, Weight on Bit, establishing a form that can be minimized mathematically. Once the optimum Weight on Bit was determined, the interdependent relationship that Weight on Bit has with Torque and Penetration per Revolution was used to determine optimum values for those parameters for a given drilling situation. The improved method was validated through laboratory experimentation and analysis of published data. Two rock types were subjected to four treatments each, and drilled in a controlled laboratory environment. The method was applied in each case, and the optimum parameters for minimum MSE were computed. The method demonstrated an accurate means to determine optimum drilling parameters of Weight on Bit, Torque, and Penetration per Revolution. A unique application of micro-cracking is also presented, which demonstrates that rock failure ahead of the bit is related to axial force more than to rotation speed.

Hamrick, Todd

2011-05-25T23:59:59.000Z

380

Optimum cycle parameters of coal fired closed cycle gas turbine in regenerative and combined cycle configurations  

Science Conference Proceedings (OSTI)

This paper presents the methodology developed for the estimation of thermodynamic performance and reports the optimum cycle parameters of coal fired CCGT in regenerative and combined cycle configurations using air, helium and carbon dioxide as working gases. A rigorous approach has been followed for the determination of the cycle efficiency by assuming the specific heat of working gases as a continuous function of temperature for accurate estimation of cycle parameters. 14 refs.

Rao, J.S.

1982-01-01T23:59:59.000Z

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


381

Study of inertia welding: the sensitivity of weld configuration and strength to variations in welding parameters  

Science Conference Proceedings (OSTI)

An experiment is described which is designed to demonstrate the forgiveness of inertia welding, that is, the relative insensitivity of weld strength to variations in energy (rotational speed of parts) and axial force. Although easily observed variations in the welding parameters produced easily observed changes in weldment configuration and changes in dimension (upset), only extremes in parameters produced changes in weld strength. Consequently, process monitoring and product inspection would be sufficient for quality assurance in a production environment.

Mote, M.W.

1981-12-01T23:59:59.000Z

382

Parameter estimation for compact binary coalescence signals with the first generation gravitational-wave detector network  

E-Print Network (OSTI)

Compact binary systems with neutron stars or black holes are one of the most promising sources for ground-based gravitational wave detectors. Gravitational radiation encodes rich information about source physics; thus parameter estimation and model selection are crucial analysis steps for any detection candidate events. Detailed models of the anticipated waveforms enable inference on several parameters, such as component masses, spins, sky location and distance that are essential for new astrophysical studies of these sources. However, accurate measurements of these parameters and discrimination of models describing the underlying physics are complicated by artifacts in the data, uncertainties in the waveform models and in the calibration of the detectors. Here we report such measurements on a selection of simulated signals added either in hardware or software to the data collected by the two LIGO instruments and the Virgo detector during their most recent joint science run, including a "blind injection" where the signal was not initially revealed to the collaboration. We exemplify the ability to extract information about the source physics on signals that cover the neutron star and black hole parameter space over the individual mass range 1 Msun - 25 Msun and the full range of spin parameters. The cases reported in this study provide a snap-shot of the status of parameter estimation in preparation for the operation of advanced detectors.

the LIGO Scientific Collaboration; the Virgo Collaboration; J. Aasi; J. Abadie; B. P. Abbott; R. Abbott; T. D. Abbott; M. Abernathy; T. Accadia; F. Acernese; C. Adams; T. Adams; P. Addesso; R. Adhikari; C. Affeldt; M. Agathos; K. Agatsuma; P. Ajith; B. Allen; A. Allocca; E. Amador Ceron; D. Amariutei; S. B. Anderson; W. G. Anderson; K. Arai; M. C. Araya; S. Ast; S. M. Aston; P. Astone; D. Atkinson; P. Aufmuth; C. Aulbert; B. E. Aylott; S. Babak; P. Baker; G. Ballardin; S. Ballmer; Y. Bao; J. C. B. Barayoga; D. Barker; F. Barone; B. Barr; L. Barsotti; M. Barsuglia; M. A. Barton; I. Bartos; R. Bassiri; M. Bastarrika; A. Basti; J. Batch; J. Bauchrowitz; Th. S. Bauer; M. Bebronne; D. Beck; B. Behnke; M. Bejger; M. G. Beker; A. S. Bell; C. Bell; I. Belopolski; M. Benacquista; J. M. Berliner; A. Bertolini; J. Betzwieser; N. Beveridge; P. T. Beyersdorf; T. Bhadbade; I. A. Bilenko; G. Billingsley; J. Birch; R. Biswas; M. Bitossi; M. A. Bizouard; E. Black; J. K. Blackburn; L. Blackburn; D. Blair; B. Bland; M. Blom; O. Bock; T. P. Bodiya; C. Bogan; C. Bond; R. Bondarescu; F. Bondu; L. Bonelli; R. Bonnand; R. Bork; M. Born; V. Boschi; S. Bose; L. Bosi; B. Bouhou; S. Braccini; C. Bradaschia; P. R. Brady; V. B. Braginsky; M. Branchesi; J. E. Brau; J. Breyer; T. Briant; D. O. Bridges; A. Brillet; M. Brinkmann; V. Brisson; M. Britzger; A. F. Brooks; D. A. Brown; T. Bulik; H. J. Bulten; A. Buonanno; J. Burguet--Castell; D. Buskulic; C. Buy; R. L. Byer; L. Cadonati; G. Cagnoli; E. Calloni; J. B. Camp; P. Campsie; K. Cannon; B. Canuel; J. Cao; C. D. Capano; F. Carbognani; L. Carbone; S. Caride; S. Caudill; M. Cavaglià; F. Cavalier; R. Cavalieri; G. Cella; C. Cepeda; E. Cesarini; T. Chalermsongsak; P. Charlton; E. Chassande-Mottin; W. Chen; X. Chen; Y. Chen; A. Chincarini; A. Chiummo; H. S. Cho; J. Chow; N. Christensen; S. S. Y. Chua; C. T. Y. Chung; S. Chung; G. Ciani; F. Clara; D. E. Clark; J. A. Clark; J. H. Clayton; F. Cleva; E. Coccia; P. -F. Cohadon; C. N. Colacino; A. Colla; M. Colombini; A. Conte; R. Conte; D. Cook; T. R. Corbitt; M. Cordier; N. Cornish; A. Corsi; C. A. Costa; M. Coughlin; J. -P. Coulon; P. Couvares; D. M. Coward; M. Cowart; D. C. Coyne; J. D. E. Creighton; T. D. Creighton; A. M. Cruise; A. Cumming; L. Cunningham; E. Cuoco; R. M. Cutler; K. Dahl; M. Damjanic; S. L. Danilishin; S. D'Antonio; K. Danzmann; V. Dattilo; B. Daudert; H. Daveloza; M. Davier; E. J. Daw; T. Dayanga; R. De Rosa; D. DeBra; G. Debreczeni; J. Degallaix; W. Del Pozzo; T. Dent; V. Dergachev; R. DeRosa; S. Dhurandhar; L. Di Fiore; A. Di Lieto; I. Di Palma; M. Di Paolo Emilio; A. Di Virgilio; M. Díaz; A. Dietz; F. Donovan; K. L. Dooley; S. Doravari; S. Dorsher; M. Drago; R. W. P. Drever; J. C. Driggers; Z. Du; J. -C. Dumas; S. Dwyer; T. Eberle; M. Edgar; M. Edwards; A. Effler; P. Ehrens; G. Endröczi; R. Engel; T. Etzel; K. Evans; M. Evans; T. Evans; M. Factourovich; V. Fafone; S. Fairhurst; B. F. Farr; W. M. Farr; M. Favata; D. Fazi; H. Fehrmann; D. Feldbaum; F. Feroz; I. Ferrante; F. Ferrini; F. Fidecaro; L. S. Finn; I. Fiori; R. P. Fisher; R. Flaminio; S. Foley; E. Forsi; L. A. Forte; N. Fotopoulos; J. -D. Fournier; J. Franc; S. Franco; S. Frasca; F. Frasconi; M. Frede; M. A. Frei; Z. Frei; A. Freise; R. Frey; T. T. Fricke; D. Friedrich; P. Fritschel; V. V. Frolov; M. -K. Fujimoto; P. J. Fulda; M. Fyffe; J. Gair; M. Galimberti; L. Gammaitoni; J. Garcia; F. Garufi; M. E. Gáspár; G. Gelencser; G. Gemme; E. Genin; A. Gennai; L. Á. Gergely; S. Ghosh; J. A. Giaime; S. Giampanis; K. D. Giardina; A. Giazotto; S. Gil-Casanova; C. Gill; J. Gleason; E. Goetz; G. González; M. L. Gorodetsky; S. Goßler; R. Gouaty; C. Graef; P. B. Graff; M. Granata; A. Grant; C. Gray; R. J. S. Greenhalgh; A. M. Gretarsson; C. Griffo; H. Grote; K. Grover; S. Grunewald; G. M. Guidi; C. Guido; R. Gupta; E. K. Gustafson; R. Gustafson; J. M. Hallam; D. Hammer; G. Hammond; J. Hanks; C. Hanna; J. Hanson; J. Harms; G. M. Harry; I. W. Harry; E. D. Harstad; M. T. Hartman; C. -J. Haster; K. Haughian; K. Hayama; J. -F. Hayau; J. Heefner; A. Heidmann; M. C. Heintze; H. Heitmann; P. Hello; G. Hemming; M. A. Hendry; I. S. Heng; A. W. Heptonstall; V. Herrera; M. Heurs; M. Hewitson; S. Hild; D. Hoak; K. A. Hodge; K. Holt; M. Holtrop; T. Hong; S. Hooper; J. Hough; E. J. Howell; B. Hughey; S. Husa; S. H. Huttner; T. Huynh-Dinh; D. R. Ingram; R. Inta; T. Isogai; A. Ivanov; K. Izumi; M. Jacobson; E. James; Y. J. Jang; P. Jaranowski; E. Jesse; W. W. Johnson; D. I. Jones; R. Jones; R. J. G. Jonker; L. Ju; P. Kalmus; V. Kalogera; S. Kandhasamy; G. Kang; J. B. Kanner; M. Kasprzack; R. Kasturi; E. Katsavounidis; W. Katzman; H. Kaufer; K. Kaufman; K. Kawabe; S. Kawamura; F. Kawazoe; D. Keitel; D. Kelley; W. Kells; D. G. Keppel; Z. Keresztes; A. Khalaidovski; F. Y. Khalili; E. A. Khazanov; B. K. Kim; C. Kim; H. Kim; K. Kim; N. Kim; Y. M. Kim; P. J. King

2013-04-05T23:59:59.000Z

383

The importance of transport parameter cross correlations in natural systems radioactive transport models  

Science Conference Proceedings (OSTI)

Transport parameter cross correlations are rarely considered in models used to predict radionuclide transport in natural systems. In this paper, it is shown that parameter cross correlations could have a significant impact on radionuclide transport predictions in saturated media. In fractured rock, the positive correlation between fracture apertures and groundwater residence times is shown to result in significantly less retardation due to matrix diffusion than is predicted without the correlation. The suppression of matrix diffusion is further amplified by a tendency toward larger apertures, smaller matrix diffusion coefficients, and less sorption capacity in rocks of lower matrix porosity. In a hypothetical example, strong cross correlations between these parameters result in a decrease in predicted radionuclide travel times of an order of magnitude or more relative to travel times calculated with uncorrelated parameters. In porous media, expected correlations between permeability, porosity, and sorption capacity also result in shorter predicted travel times than when the parameters are assumed to be uncorrelated. Individual parameter standard deviations can also have a significant influence on predicted radionuclide travel times, particularly when cross correlations are considered.

Reimus, Paul W [Los Alamos National Laboratory

2011-01-03T23:59:59.000Z

384

Development of High Resolution Land Surface Parameters for the Community Land Model  

SciTech Connect

There is a growing need for high-resolution land surface parameters as land surface models are being applied at increasingly higher spatial resolution offline as well as in regional and global models. The default land surface parameters for the most recent version of the Community Land Model (i.e. CLM 4.0) are at 0.5° or coarser resolutions, released with the Community Earth System Model (CESM). Plant Functional Types (PFTs), vegetation properties such as Leaf Area Index (LAI), Stem Area Index (SAI), and non-vegetated land covers were developed using remotely sensed datasets retrieved in late 1990’s and the beginning of this century. In this study, we developed new land surface parameters for CLM 4.0, specifically PFTs, LAI, SAI and non-vegetated land cover composition, at 0.05° resolution globally based on the most recent MODIS land cover and improved MODIS LAI products. Compared to the current CLM 4.0 parameters, the new parameters produced a decreased coverage by bare soil and trees, but an increased coverage by shrub, grass, and cropland. The new parameters result in a decrease in global seasonal LAI, with the biggest decrease in boreal forests; however, the new parameters also show a large increase in LAI in tropical forest. Differences between the new and the current parameters are mainly caused by changes in the sources of remotely sensed data and the representation of land cover in the source data. Advantages and disadvantages of each dataset were discussed in order to provide guidance on the use of the data. The new high-resolution land surface parameters have been used in a coupled land-atmosphere model (WRF-CLM) applied to the western U.S. to demonstrate their use in high-resolution modeling. A remapping method from the latitude/longitude grid of the CLM data to the WRF grids with map projection was also demonstrated. Future work will include global offline CLM simulations to examine the impacts of source data resolution and subsequent land parameter changes on simulated land surface processes.

Ke, Yinghai; Leung, Lai-Yung R.; Huang, Maoyi; Coleman, Andre M.; Li, Hongyi; Wigmosta, Mark S.

2012-11-06T23:59:59.000Z

385

An Extended Grid of Nova Models: II. The Parameter Space of Nova Outbursts  

E-Print Network (OSTI)

This paper is a sequel to an earlier paper devoted to multiple, multicycle nova evolution models (Prialnik & Kovetz 1995, first paper of the series), which showed that the different characteristics of nova outbursts can be reproduced by varying the values of three basic and independent parameters: the white dwarf mass-M_{WD}, the temperature of its isothermal core-T_{WD} and the mass transfer rate-Mdot. Apart from being the largest computational classical novae parameter-space survey, we show here that the parameter space is constrained by several analytical considerations and find its limiting surfaces. Consequently, we extend the grid of multicycle nova evolution models presented in Paper I almost to its limits, adding multicycle nova outburst calculations for a considerable number of new parameter combinations. In particular, the extended parameter pace that produces nova eruptions includes low mass transfer rates down to 5e-13 Msun/yr, and more models for low T_{WD}. Resulting characteristics of these runs are added to the former parameter combination results, to provide a full grid spanning the entire parameter space for Carbon-Oxygen white dwarfs. The full grid covers the entire range of observed nova characteristics, even those of peculiar objects, which have not been numerically reproduced until now. Most remarkably, runs for very low Mdot lead to very high values for some characteristics, such as outburst amplitude A>~20, high super-Eddington luminosities at maximum, heavy element abundance of the ejecta Z_{ej}~0.63 and high ejected masses m_{ej}~7e-4 Msun.

O. Yaron; D. Prialnik; M. M. Shara; A. Kovetz

2005-03-07T23:59:59.000Z

386

Effects of breach formation parameter uncertainty on inundation risk area and consequence analysis  

SciTech Connect

According to the national inventory of dams (NID), there are approximately 79,500 dams in the United States, with 11,800 of these dams being classified as high-hazard. It has been recommended that each high-hazard dam in the United States have an emergency action plan (EAP), but it has been found that only about 60% of the high-hazard dams have a complete EAP. A major aspect of these plans is inundation risk area identification and associated impacts in the event of dam failure. In order to determine the inundation risk area an estimation of breach discharge must be completed. Most methods used to determine breach discharge, including the NWS-DAMBRK model, require modelers to select size, shape, and time of breach formation. Federal agencies (e.g. Bureau of Reclamation, Federal Energy Regulatory Commission) with oversight of U.S. dams have recommended ranges of values for each of these parameters based on dam type. However, variations in these parameters even within the recommended range have the potential to impose significant transformation on the discharge hydrograph relative to both timing and magnitude of the peak discharge. Therefore, it has also been recommended that sensitivity of these parameters be investigated when performing breach inundation analyses. This paper presents a sensitivity analysis of three breach parameters (average breach width, side slope, and time to failure) on a case study dam located in the United States. The sensitivity analysis employed was based on the 3{sup 3} factorial design, in which three levels (e.g. low, medium, and high) were selected for each of the three parameters, resulting in twenty-seven combinations. The three levels remained within the recommended range of values for each parameter type. With each combination of input parameters, a discharge hydrograph was generated and used as a source condition for inundation analysis using a two-dimensional shallow water equation model. The resulting simulations were compared to determine the sensitivity of flood inundation area, flood arrival time, peak flood depths, and socio-economic impacts (e.g. population at risk, direct and indirect economic loss) to changes in individual parameters and parameter interactions. Results and discussion from this sensitivity analysis will be presented in detail in the paper.

Skousen, Benjamin Don [Los Alamos National Laboratory; David, Judi [Los Alamos National Laboratory; Mc Pherson, Timothy [Los Alamos National Laboratory; Burian, Steve [UNIV OF UTAH

2010-01-01T23:59:59.000Z

387

Towards Rapid Parameter Estimation on Gravitational Waves from Compact Binaries using Interpolated Waveforms  

E-Print Network (OSTI)

Accurate parameter estimation of gravitational waves from coalescing compact binary sources is a key requirement for gravitational-wave astronomy. Evaluating the posterior probability density function of the binary's parameters (component masses, sky location, distance, etc.) requires computing millions of waveforms. The computational expense of parameter estimation is dominated by waveform generation and scales linearly with the waveform computational cost. Previous work showed that gravitational waveforms from non-spinning compact binary sources are amenable to a truncated singular value decomposition, which allows them to be reconstructed via interpolation at fixed computational cost. However, the accuracy requirement for parameter estimation is typically higher than for searches, so it is crucial to ascertain that interpolation does not lead to significant errors. Here we provide a proof of principle to show that interpolated waveforms can be used to recover posterior probability density functions with negligible loss in accuracy with respect to non-interpolated waveforms. This technique has the potential to significantly increase the efficiency of parameter estimation.

R. J. E. Smith; K. Cannon; C. Hanna; D. Keppel; I. Mandel

2012-11-06T23:59:59.000Z

388

Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results  

E-Print Network (OSTI)

We present cosmological parameter constraints based on the final nine-year WMAP data, in conjunction with additional cosmological data sets. The WMAP data alone, and in combination, continue to be remarkably well fit by a six-parameter LCDM model. When WMAP data are combined with measurements of the high-l CMB anisotropy, the BAO scale, and the Hubble constant, the densities, Omegabh2, Omegach2, and Omega_L, are each determined to a precision of ~1.5%. The amplitude of the primordial spectrum is measured to within 3%, and there is now evidence for a tilt in the primordial spectrum at the 5sigma level, confirming the first detection of tilt based on the five-year WMAP data. At the end of the WMAP mission, the nine-year data decrease the allowable volume of the six-dimensional LCDM parameter space by a factor of 68,000 relative to pre-WMAP measurements. We investigate a number of data combinations and show that their LCDM parameter fits are consistent. New limits on deviations from the six-parameter model are p...

Hinshaw, G; Komatsu, E; Spergel, D N; Bennett, C L; Dunkley, J; Nolta, M R; Halpern, M; Hill, R S; Odegard, N; Page, L; Smith, K M; Weiland, J L; Gold, B; Jarosik, N; Kogut, A; Limon, M; Meyer, S S; Tucker, G S; Wollack, E; Wright, E L

2012-01-01T23:59:59.000Z

389

An Extended Grid of Nova Models: II. The Parameter Space of Nova Outbursts  

E-Print Network (OSTI)

This paper is a sequel to an earlier paper devoted to multiple, multicycle nova evolution models (Prialnik & Kovetz 1995, first paper of the series), which showed that the different characteristics of nova outbursts can be reproduced by varying the values of three basic and independent parameters: the white dwarf mass-M_{WD}, the temperature of its isothermal core-T_{WD} and the mass transfer rate-Mdot. Apart from being the largest computational classical novae parameter-space survey, we show here that the parameter space is constrained by several analytical considerations and find its limiting surfaces. Consequently, we extend the grid of multicycle nova evolution models presented in Paper I almost to its limits, adding multicycle nova outburst calculations for a considerable number of new parameter combinations. In particular, the extended parameter pace that produces nova eruptions includes low mass transfer rates down to 5e-13 Msun/yr, and more models for low T_{WD}. Resulting characteristics of these...

Yaron, O; Shara, M M; Kovetz, A

2005-01-01T23:59:59.000Z

390

Using BBN in cosmological parameter extraction from CMB: a forecast for Planck  

E-Print Network (OSTI)

Data from future high-precision Cosmic Microwave Background (CMB) measurements will be sensitive to the primordial Helium abundance $Y_p$. At the same time, this parameter can be predicted from Big Bang Nucleosynthesis (BBN) as a function of the baryon and radiation densities, as well as a neutrino chemical potential. We suggest to use this information to impose a self-consistent BBN prior on $Y_p$ and determine its impact on parameter inference from simulated Planck data. We find that this approach can significantly improve bounds on cosmological parameters compared to an analysis which treats $Y_p$ as a free parameter, if the neutrino chemical potential is taken to vanish. We demonstrate that fixing the Helium fraction to an arbitrary value can seriously bias parameter estimates. Under the assumption of degenerate BBN (i.e., letting the neutrino chemical potential $\\xi$ vary), the BBN prior's constraining power is somewhat weakened, but nevertheless allows us to constrain $\\xi$ with an accuracy that rivals bounds inferred from present data on light element abundances.

Jan Hamann; Julien Lesgourgues; Gianpiero Mangano

2007-12-18T23:59:59.000Z

391

Lumped and Distributed Parameter SPICE Models of TE Devices Considering Temperature Dependent Material Properties  

E-Print Network (OSTI)

Based on simplified one-dimensional steady-state analysis of thermoelectric phenomena and on analogies between thermal and electrical domains, we propose both lumped and distributed parameter electrical models for thermoelectric devices. For lumped parameter models, constant values for material properties are extracted from polynomial fit curves evaluated at different module temperatures (hot side, cold side, average, and mean module temperature). For the case of distributed parameter models, material properties are calculated according to the mean temperature at each segment of a sectioned device. A couple of important advantages of the presented models are that temperature dependence of material properties is considered and that they can be easily simulated using an electronic simulation tool such as SPICE. Comparisons are made between SPICE simulations for a single-pellet module using the proposed models and with numerical simulations carried out with Mathematica software. Results illustrate accuracy of the distributed parameter models and show how inappropriate is to assume, in some cases, constant material parameters for an entire thermoelectric element.

D. Mitrani; J. Salazar; A. Turo; M. J. García; J. A. Chávez

2008-01-07T23:59:59.000Z

392

2nd International Joint Topical Meeting on Emergency Preparedness and Response and Robotic and Remote Systems  

Science Conference Proceedings (OSTI)

It is desirable for the Department of Energy/National Nuclear Security Administration emergency preparedness and response community to have available every resource to enhance its capabilities for assessing the health effects of environmental agents. Such resources will aid DOE/NNSA in achieving its goal of protecting the health and safety of workers, the public, and environment in event of the release of radiological, chemical, or biological agents into the environment. Studies are reported in this paper where composite data analyses were done for the chemicals included in DOE's Protective Action Criteria (PACs) database. PACs define the concentration of airborne chemicals at which protective actions are required. They are used by DOE/NNSA in developing Emergency Preparedness Procedures and for Operational Emergencies. Data analyses were conducted to discern structure-activity relationship patterns among PAC chemicals by assigned classification schemes based on the 30 accepted categories used by the EPA Gene-Tox Program. PAC chemicals were scored according to their frequency of distribution, severity of toxicity index, and structural classification. These studies yielded results that could be helpful in assessing the toxicity of new chemicals. It is suggested that provisions be made to include chemical structural information in the PAC database.

Lu, Po-Yung [ORNL; Thomas, Richard D. [Intercet, Ltd.; Wassom, John S. [Oak Ridge National Laboratory (Retired)

2008-01-01T23:59:59.000Z

393

Effective Hydraulic Parameters in Horizontally and Vertically Heterogeneous Soils for Steady-State Land–Atmosphere Interaction  

Science Conference Proceedings (OSTI)

In this study, the authors investigate effective soil hydraulic parameter averaging schemes for steady-state flow in heterogeneous shallow subsurfaces useful to land–atmosphere interaction modeling. “Effective” soil hydraulic parameters of the ...

Binayak P. Mohanty; Jianting Zhu

2007-08-01T23:59:59.000Z

394

Impact of Geographic-Dependent Parameter Optimization on Climate Estimation and Prediction: Simulation with an Intermediate Coupled Model  

Science Conference Proceedings (OSTI)

Because of the geographic dependence of model sensitivities and observing systems, allowing optimized parameter values to vary geographically may significantly enhance the signal in parameter estimation. Using an intermediate atmosphere–ocean–land ...

Xinrong Wu; Shaoqing Zhang; Zhengyu Liu; Anthony Rosati; Thomas L. Delworth; Yun Liu

2012-12-01T23:59:59.000Z

395

Evaluation of the Parameter Sensitivities of a Coupled Land Surface Hydrologic Model at a Critical Zone Observatory  

Science Conference Proceedings (OSTI)

Land surface models (LSMs) and hydrologic models are parameterized models. The number of involved parameters is often large. Sensitivity analysis (SA) is a key step to understand the complex relationship between state variables and parameters, and ...

Yuning Shi; Kenneth J. Davis; Fuqing Zhang; Christopher J. Duffy

396

Comparison of Single-Parameter and Multiparameter Ensembles for Assimilation of Radar Observations Using the Ensemble Kalman Filter  

Science Conference Proceedings (OSTI)

Observational studies indicate that the densities and intercept parameters of hydrometeor distributions can vary widely among storms and even within a single storm. Therefore, assuming a fixed set of microphysical parameters within a given ...

Nusrat Yussouf; David J. Stensrud

2012-02-01T23:59:59.000Z

397

Neural Network Based Modeling of a Large Steam Turbine-Generator Rotor Body Parameters from On-Line Disturbance Data  

E-Print Network (OSTI)

Neural Network Based Modeling of a Large Steam Turbine-Generator Rotor Body Parameters from On technique to estimate and model rotor- body parameters of a large steam turbine-generator from real time

398

Impact of Parameter Estimation on the Performance of the FSU Global Spectral Model Using Its Full-Physics Adjoint  

Science Conference Proceedings (OSTI)

The full-physics adjoint of the Florida State University Global Spectral Model at resolution T42L12 is applied to carry out parameter estimation using an initialized analysis dataset. The three parameters, that is, the biharmonic horizontal ...

Yanqiu Zhu; I. M. Navon

1999-07-01T23:59:59.000Z

399

Discovering Associations between Climatic and Oceanic Parameters to Monitor Drought in Nebraska Using Data-Mining Techniques  

Science Conference Proceedings (OSTI)

Drought is a complex natural hazard that is best characterized by multiple climatological and hydrological parameters. Improving our understanding of the relationships between these parameters is necessary to reduce the impacts of drought. Data ...

Tsegaye Tadesse; Donald A. Wilhite; Michael J. Hayes; Sherri K. Harms; Steve Goddard

2005-05-01T23:59:59.000Z

400

Evaluation of testing and reservoir parameters in geothermal wells at Raft  

Open Energy Info (EERE)

testing and reservoir parameters in geothermal wells at Raft testing and reservoir parameters in geothermal wells at Raft River and Boise, Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Evaluation of testing and reservoir parameters in geothermal wells at Raft River and Boise, Idaho Details Activities (1) Areas (1) Regions (0) Abstract: Evaluating the Raft River and Boise, Idaho, resources by pump and injection tests require information on the geology, geochemistry, surficial and borehole geophysics, and well construction and development methods. Nonideal test conditions and a complex hydrogeologic system prevent the use of idealized mathematical models for data evaluation in a one-phase fluid system. An empirical approach is successfully used since it was observed that all valid pump and injection well pressure data for constant discharge

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401

Effect of Key Parameters on the Photocatalytic Oxidation of Toluene at Low  

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

Effect of Key Parameters on the Photocatalytic Oxidation of Toluene at Low Effect of Key Parameters on the Photocatalytic Oxidation of Toluene at Low Concentrations in Air under 254 + 185 nm UV Irradiation Title Effect of Key Parameters on the Photocatalytic Oxidation of Toluene at Low Concentrations in Air under 254 + 185 nm UV Irradiation Publication Type Journal Article Year of Publication 2010 Authors Quici, Natalia, María L. Vera, Hyeok Choi, Gianluca Li Puma, Dionysios D. Dionysiou, Marta I. Litter, and Hugo Destaillats Journal Applied Catalysis B: Environmental Volume 95 Issue 3-4 Pagination 312-319 Date Published 04/2010 Keywords air treatment, environmental chemistry, exposure & risk group, heterogeneous photocatalysis, indoor environment department, indoors, oxidation, photocatalytic, tio2, titania, toluene, uvpco, volatile organic compounds

402

Parameter estimation for compact binary coalescence signals with the first generation gravitational-wave detector network  

E-Print Network (OSTI)

Compact binary systems with neutron stars or black holes are one of the most promising sources for ground-based gravitational wave detectors. Gravitational radiation encodes rich information about source physics; thus parameter estimation and model selection are crucial analysis steps for any detection candidate events. Detailed models of the anticipated waveforms enable inference on several parameters, such as component masses, spins, sky location and distance that are essential for new astrophysical studies of these sources. However, accurate measurements of these parameters and discrimination of models describing the underlying physics are complicated by artifacts in the data, uncertainties in the waveform models and in the calibration of the detectors. Here we report such measurements on a selection of simulated signals added either in hardware or software to the data collected by the two LIGO instruments and the Virgo detector during their most recent joint science run, including a "blind injection" wher...

Aasi, J; Abbott, B P; Abbott, R; Abbott, T D; Abernathy, M; Accadia, T; Acernese, F; Adams, C; Adams, T; Addesso, P; Adhikari, R; Affeldt, C; Agathos, M; Agatsuma, K; Ajith, P; Allen, B; Allocca, A; Ceron, E Amador; Amariutei, D; Anderson, S B; Anderson, W G; Arai, K; Araya, M C; Ast, S; Aston, S M; Astone, P; Atkinson, D; Aufmuth, P; Aulbert, C; Aylott, B E; Babak, S; Baker, P; Ballardin, G; Ballmer, S; Bao, Y; Barayoga, J C B; Barker, D; Barone, F; Barr, B; Barsotti, L; Barsuglia, M; Barton, M A; Bartos, I; Bassiri, R; Bastarrika, M; Basti, A; Batch, J; Bauchrowitz, J; Bauer, Th S; Bebronne, M; Beck, D; Behnke, B; Bejger, M; Beker, M G; Bell, A S; Bell, C; Belopolski, I; Benacquista, M; Berliner, J M; Bertolini, A; Betzwieser, J; Beveridge, N; Beyersdorf, P T; Bhadbade, T; Bilenko, I A; Billingsley, G; Birch, J; Biswas, R; Bitossi, M; Bizouard, M A; Black, E; Blackburn, J K; Blackburn, L; Blair, D; Bland, B; Blom, M; Bock, O; Bodiya, T P; Bogan, C; Bond, C; Bondarescu, R; Bondu, F; Bonelli, L; Bonnand, R; Bork, R; Born, M; Boschi, V; Bose, S; Bosi, L; Bouhou, B; Braccini, S; Bradaschia, C; Brady, P R; Braginsky, V B; Branchesi, M; Brau, J E; Breyer, J; Briant, T; Bridges, D O; Brillet, A; Brinkmann, M; Brisson, V; Britzger, M; Brooks, A F; Brown, D A; Bulik, T; Bulten, H J; Buonanno, A; Burguet--Castell, J; Buskulic, D; Buy, C; Byer, R L; Cadonati, L; Cagnoli, G; Calloni, E; Camp, J B; Campsie, P; Cannon, K; Canuel, B; Cao, J; Capano, C D; Carbognani, F; Carbone, L; Caride, S; Caudill, S; Cavaglià, M; Cavalier, F; Cavalieri, R; Cella, G; Cepeda, C; Cesarini, E; Chalermsongsak, T; Charlton, P; Chassande-Mottin, E; Chen, W; Chen, X; Chen, Y; Chincarini, A; Chiummo, A; Cho, H S; Chow, J; Christensen, N; Chua, S S Y; Chung, C T Y; Chung, S; Ciani, G; Clara, F; Clark, D E; Clark, J A; Clayton, J H; Cleva, F; Coccia, E; Cohadon, P -F; Colacino, C N; Colla, A; Colombini, M; Conte, A; Conte, R; Cook, D; Corbitt, T R; Cordier, M; Cornish, N; Corsi, A; Costa, C A; Coughlin, M; Coulon, J -P; Couvares, P; Coward, D M; Cowart, M; Coyne, D C; Creighton, J D E; Creighton, T D; Cruise, A M; Cumming, A; Cunningham, L; Cuoco, E; Cutler, R M; Dahl, K; Damjanic, M; Danilishin, S L; D'Antonio, S; Danzmann, K; Dattilo, V; Daudert, B; Daveloza, H; Davier, M; Daw, E J; Dayanga, T; De Rosa, R; DeBra, D; Debreczeni, G; Degallaix, J; Del Pozzo, W; Dent, T; Dergachev, V; DeRosa, R; Dhurandhar, S; Di Fiore, L; Di Lieto, A; Di Palma, I; Emilio, M Di Paolo; Di Virgilio, A; Díaz, M; Dietz, A; Donovan, F; Dooley, K L; Doravari, S; Dorsher, S; Drago, M; Drever, R W P; Driggers, J C; Du, Z; Dumas, J -C; Dwyer, S; Eberle, T; Edgar, M; Edwards, M; Effler, A; Ehrens, P; Endröczi, G; Engel, R; Etzel, T; Evans, K; Evans, M; Evans, T; Factourovich, M; Fafone, V; Fairhurst, S; Farr, B F; Farr, W M; Favata, M; Fazi, D; Fehrmann, H; Feldbaum, D; Ferrante, I; Ferrini, F; Fidecaro, F; Finn, L S; Fiori, I; Fisher, R P; Flaminio, R; Foley, S; Forsi, E; Forte, L A; Fotopoulos, N; Fournier, J -D; Franc, J; Franco, S; Frasca, S; Frasconi, F; Frede, M; Frei, M A; Frei, Z; Freise, A; Frey, R; Fricke, T T; Friedrich, D; Fritschel, P; Frolov, V V; Fujimoto, M -K; Fulda, P J; Fyffe, M; Gair, J; Galimberti, M; Gammaitoni, L; Garcia, J; Garufi, F; Gáspár, M E; Gelencser, G; Gemme, G; Genin, E; Gennai, A; Gergely, L Á; Ghosh, S; Giaime, J A; Giampanis, S; Giardina, K D; Giazotto, A; Gil-Casanova, S; Gill, C; Gleason, J; Goetz, E; González, G; Gorodetsky, M L; Goßler, S; Gouaty, R; Graef, C; Graff, P B; Granata, M; Grant, A; Gray, C; Greenhalgh, R J S; Gretarsson, A M; Griffo, C; Grote, H; Grover, K; Grunewald, S; Guidi, G M; Guido, C; Gupta, R; Gustafson, E K; Gustafson, R; Hallam, J M; Hammer, D; Hammond, G; Hanks, J; Hanna, C; Hanson, J; Harms, J; Harry, G M; Harry, I W; Harstad, E D; Hartman, M T; Haster, C -J; Haughian, K; Hayama, K; Hayau, J -F; Heefner, J; Heidmann, A; Heintze, M C; Heitmann, H; Hello, P; Hemming, G; Hendry, M A; Heng, I S; Heptonstall, A W; Herrera, V; Heurs, M; Hewitson, M; Hild, S; Hoak, D; Hodge, K A; Holt, K; Holtrop, M; Hong, T; Hooper, S; Hough, J; Howell, E J; Hughey, B; Husa, S; Huttner, S H; Huynh-Dinh, T; Ingram, D R; Inta, R; Isogai, T; Ivanov, A; Izumi, K; Jacobson, M; James, E; Jang, Y J; Jaranowski, P; Jesse, E; Johnson, W W; Jones, D I; Jones, R; Jonker, R J G; Ju, L; Kalmus, P; Kalogera, V; Kandhasamy, S; Kang, G; Kanner, J B; Kasprzack, M; Kasturi, R; Katsavounidis, E; Katzman, W; Kaufer, H; Kaufman, K; Kawabe, K; Kawamura, S; Kawazoe, F; Keitel, D; Kelley, D; Kells, W; Keppel, D G; Keresztes, Z; Khalaidovski, A; Khalili, F Y; Khazanov, E A; Kim, B K; Kim, C; Kim, H; Kim, K; Kim, N; Kim, Y M; King, P J; Kinzel, D L; Kissel, J S; Klimenko, S; Kline, J; Kokeyama, K; Kondrashov, V; Koranda, S; Korth, W Z; Kowalska, I; Kozak, D; Kringel, V; Krishnan, B; Królak, A; Kuehn, G; Kumar, P; Kumar, R; Kurdyumov, R; Kwee, P

2013-01-01T23:59:59.000Z

403

Neutronic safety parameters and transient analyses for Poland's MARIA research reactor.  

SciTech Connect

Reactor kinetic parameters, reactivity feedback coefficients, and control rod reactivity worths have been calculated for the MARIA Research Reactor (Swierk, Poland) for M6-type fuel assemblies with {sup 235}U enrichments of 80% and 19.7%. Kinetic parameters were evaluated for family-dependent effective delayed neutron fractions, decay constants, and prompt neutron lifetimes and neutron generation times. Reactivity feedback coefficients were determined for fuel Doppler coefficients, coolant (H{sub 2}O) void and temperature coefficients, and for in-core and ex-core beryllium temperature coefficients. Total and differential control rod worths and safety rod worths were calculated for each fuel type. These parameters were used to calculate generic transients for fast and slow reactivity insertions with both HEU and LEU fuels. The analyses show that the HEU and LEU cores have very similar responses to these transients.

Bretscher, M. M.; Hanan, N. A.; Matos, J. E.; Andrzejewski, K.; Kulikowska, T.

1999-09-27T23:59:59.000Z

404

Sub-0.1 nm-resolution quantitative scanning transmission electron microscopy without adjustable parameters  

Science Conference Proceedings (OSTI)

Atomic-resolution imaging in the scanning transmission electron microscope (STEM) constitutes a powerful tool for nanostructure characterization. Here, we demonstrate the quantitative interpretation of atomic-resolution high-angle annular dark-field (ADF) STEM images using an approach that does not rely on adjustable parameters. We measure independently the instrumental parameters that affect sub-0.1 nm-resolution ADF images, quantify their individual and collective contributions to the image intensity, and show that knowledge of these parameters enables a quantitative interpretation of the absolute intensity and contrast across all accessible spatial frequencies. The analysis also provides a method for the in-situ measurement of the STEM's effective source distribution.

Dwyer, C. [Monash Centre for Electron Microscopy, Monash University, Victoria 3800 (Australia); Department of Materials Engineering, Monash University, Victoria 3800 (Australia); ARC Centre of Excellence for Design in Light Metals, Monash University, Victoria 3800 (Australia); Maunders, C. [Department of Materials Engineering, Monash University, Victoria 3800 (Australia); Zheng, C. L. [Monash Centre for Electron Microscopy, Monash University, Victoria 3800 (Australia); Weyland, M.; Etheridge, J. [Monash Centre for Electron Microscopy, Monash University, Victoria 3800 (Australia); Department of Materials Engineering, Monash University, Victoria 3800 (Australia); Tiemeijer, P. C. [FEI Electron Optics, P.O. Box 80066, 5600 KA Eindhoven (Netherlands)

2012-05-07T23:59:59.000Z

405

Estimating parameters of coalescing compact binaries with a detector network including LIGO Australia  

E-Print Network (OSTI)

One of the goals of gravitational-wave astronomy is simultaneous detection of gravitational-wave signals from merging compact-object binaries and the electromagnetic transients from these mergers. With the next generation of advanced ground-based gravitational wave detectors under construction, we examine the benefits of the proposed extension of the detector network to include a fourth site in Australia in addition to the network of Hanford, Livingston and Cascina sites. Using Bayesian parameter-estimation analyses of simulated gravitational-wave signals from a range of coalescing-binary locations and orientations, we study the improvement in parameter estimation. We find that an Australian detector can break degeneracies in several parameters; in particular, the localization of the source on the sky is improved by a factor of ~4, with more modest improvements in distance and binary inclination estimates. This enhanced ability to localize sources on the sky will be crucial in any search for electromagnetic c...

Aylott, Benjamin; Kalogera, Vassiliki; Mandel, Ilya; Raymond, Vivien; Rodriguez, Carl; van der Sluys, Marc; Vecchio, Alberto; Veitch, John

2011-01-01T23:59:59.000Z

406

183W Resonance Parameter Evaluation in the Neutron Energy Range Up to 5 keV  

SciTech Connect

We generated a preliminary set of resonance parameters for {sup 183}W in the neutron energy range of thermal up to 5 keV. In the analyzed energy range, this work represents a significant improvement over the current resonance evaluation in the ENDF/B-VII.1 library limited up to 2.2 keV. The evaluation methodology uses the Reich-Moore approximation to fit, with the R-matrix code SAMMY, the high-resolution measurements performed in 2007 at the GEel LINear Accelerator (GELINA) facility. The transmission data and the capture cross sections calculated with the set of resonance parameters are compared with the experimental values, and the average properties of the resonance parameters are discussed.

Pigni, Marco T [ORNL; Dunn, Michael E [ORNL; Guber, Klaus H [ORNL

2012-01-01T23:59:59.000Z

407

Lumped and Distributed Parameter SPICE Models of TE Devices Considering Temperature Dependent Material Properties  

E-Print Network (OSTI)

Based on simplified one-dimensional steady-state analysis of thermoelectric phenomena and on analogies between thermal and electrical domains, we propose both lumped and distributed parameter electrical models for thermoelectric devices. For lumped parameter models, constant values for material properties are extracted from polynomial fit curves evaluated at different module temperatures (hot side, cold side, average, and mean module temperature). For the case of distributed parameter models, material properties are calculated according to the mean temperature at each segment of a sectioned device. A couple of important advantages of the presented models are that temperature dependence of material properties is considered and that they can be easily simulated using an electronic simulation tool such as SPICE. Comparisons are made between SPICE simulations for a single-pellet module using the proposed models and with numerical simulations carried out with Mathematica software. Results illustrate accuracy of th...

Mitrani, D; Turo, A; García, M J; Chávez, J A

2008-01-01T23:59:59.000Z

408

Evaluation of the Extension of the Cerebral Blood Flow and its Main Parameters  

E-Print Network (OSTI)

Among the major factors controlling the cerebral blood flow (CBF) - cerebral perfusion pressure, arterial partial pressure of oxygen (PaO2), cerebral metabolism, arterial partial pressure of carbon dioxide (PaCO2), and cardiac output, the effect of PaCO2 is peculiar in being independent of autoregulatory CBF mechanisms and it allows to explore the full range of the CBF. We have developed a simple physical model, and have derived a simple four parameter formula, relating the CBF to PaCO2. The parameters can be extracted in an easy way, directly from the experimental data. With this model five experimental data sets of human, rats, baboons and dogs were well fitted. The same type of parametrization was also used successfully for fitting experimental data of PaO2 of dogs. We have also looked on the dependence of the parameters on other factors and were able to evaluate their dependence on the mean arterial blood pressure.

Gersten, A

1999-01-01T23:59:59.000Z

409

Comparison of safety parameters and transient behavior of a generic 10 MW reactor with HEU and LEU fuels  

SciTech Connect

Key safety parameters are compared for equilibrium cores of the IAEA generic 10 MW reactor with HEU and LEU fuels. These parameters include kinetics parameters, reactivity feedback coefficients, control rod worths, power peaking factors, and shutdown margins. Reactivity insertion and loss-of-flow transients are compared. Results indicate that HEU and LEU cores will behave in a very similar manner.

Matos, J.E.; Freese, K.E.; Woodruff, W.L.

1983-01-01T23:59:59.000Z

410

An SOM-Hybrid Supervised Model for the Prediction of Underlying Physical Parameters from Near-Infrared Planetary Spectra  

Science Conference Proceedings (OSTI)

Near-Infrared reflectance spectra of planets can be used to infer surface parameters, sometimes with relevance to recent geologic history. Accurate prediction of parameters (such as composition, temperature, grain size, crystalline state, and dilution ... Keywords: Near-Infrared spectra, New Horizons Space Mission, Pluto-Charon system, Self-Organizing Map, parameter prediction

Lili Zhang; Erzsébet Merényi; William M. Grundy; Eliot F. Young

2009-06-01T23:59:59.000Z

411

Influence of composition on microstructural parameters of single crystal nickel-base superalloys  

Science Conference Proceedings (OSTI)

Fourteen nickel-base superalloy single crystals containing a range of chromium (Cr), cobalt (Co), molybdenum (Mo), and rhenium (Re) levels, and fixed amounts of aluminum (Al) and tantalum (Ta), were examined to determine the effect of bulk composition on basic microstructural parameters, including {gamma} Prime solvus, {gamma} Prime volume fraction, topologically close-packed (TCP) phases, {gamma} and {gamma} Prime phase chemistries, and {gamma}-{gamma} Prime lattice mismatch. Regression models describing the influence of bulk alloy composition on each of the microstructural parameters were developed and compared to predictions by a commercially-available software tool that used computational thermodynamics. Co produced the largest change in {gamma} Prime solvus over the wide compositional range explored and Mo produced the biggest effect on the {gamma} lattice parameter over its range, although Re had a very potent influence on all microstructural parameters investigated. Changing the Cr, Co, Mo, and Re contents in the bulk alloy had an impact on their concentrations in the {gamma} matrix and to a smaller extent in the {gamma} Prime phase. The software tool under-predicted {gamma} Prime solvus temperatures and {gamma} Prime volume fractions, and over-predicted TCP phase volume fractions at 982 Degree-Sign C. However, the statistical regression models provided excellent estimations of the microstructural parameters and demonstrated the usefulness of such formulas. - Highlights: Black-Right-Pointing-Pointer Effects of Cr, Co, Mo, and Re on microstructure in new low density superalloys Black-Right-Pointing-Pointer Co produced a large change in {gamma} Prime solvus; Mo had a large effect on lattice mismatch. Black-Right-Pointing-Pointer Re exhibited very potent influence on all microstructural parameters was investigated. Black-Right-Pointing-Pointer {gamma} and {gamma} Prime phase chemistries both varied with temperature and alloy composition. Black-Right-Pointing-Pointer Computational thermodynamic modeling tool did not accurately predict microstructure.

MacKay, R.A., E-mail: Rebecca.A.MacKay@nasa.gov [NASA Glenn Research Center, 21000 Brookpark Rd., Cleveland, Ohio 44135 (United States); Gabb, T.P. [NASA Glenn Research Center, 21000 Brookpark Rd., Cleveland, Ohio 44135 (United States); Garg, A. [NASA Glenn Research Center, 21000 Brookpark Rd., Cleveland, Ohio 44135 (United States); University of Toledo, 2801 W. Bancroft, Toledo, Ohio 43606 (United States); Rogers, R.B.; Nathal, M.V. [NASA Glenn Research Center, 21000 Brookpark Rd., Cleveland, Ohio 44135 (United States)

2012-08-15T23:59:59.000Z

412

Load Model Data Processing and Parameter Derivation (LMDPPD) Version 2.1  

Science Conference Proceedings (OSTI)

The tool allows the user to find optimum values of parameters for two load model structures developed as part of the load modeling project using system disturbance data. Description It is important to represent the dynamic behavior of system load for system planning studies and analysis. Developing load models is a challenging task due to the varying nature of loads and uncertainty in the load information. The Load Model Data Processing and Parameter Derivation (LMDPPD) Version 2.1 software tool is a sim...

2009-09-02T23:59:59.000Z

413

Verification of physics parameters for BWR (boiling water reaction) one-dimensional transient analysis  

SciTech Connect

A data-processing method was developed to generate physics parameters for use with the one-dimensional kinetics model of the RETRAN-02/MOD3 code. The physics parameters were verified to assure the consistency in collapsing procedures and to identify the need for further improvements. In the present study, calculations were performed during the boiling water reactor-4 Chinshan-1 cycle-7 (CS1CY7) end-of-cycle (EOC) Hailing condition, CS2CY6 middle-of-cycle (MOC), and CS1CY1 beginning-of-cycle (BOC) rated conditions. This paper describes the results of verification and their implications for plant transient analyses.

Chou, H.P. (National Tsing-Hua Univ., Hsinchu (Taiwan)); Chen, Y.J. (Institute of Nuclear Energy Research, Lung-Tan (Taiwan))

1989-11-01T23:59:59.000Z

414

Final Technical Report - Integrated Hydrogeophysical and Hydrogeologic Driven Parameter Upscaling for Dual-Domain Transport Modeling  

SciTech Connect

The three major components of this research were: 1. Application of minimally invasive, cost effective hydrogeophysical techniques (surface and borehole), to generate fine scale (~1m or less) 3D estimates of subsurface heterogeneity. Heterogeneity is defined as spatial variability in hydraulic conductivity and/or hydrolithologic zones. 2. Integration of the fine scale characterization of hydrogeologic parameters with the hydrogeologic facies to upscale the finer scale assessment of heterogeneity to field scale. 3. Determination of the relationship between dual-domain parameters and practical characterization data.

Shafer, John M

2012-11-05T23:59:59.000Z

415

Neutronic safety parameters and transient analyses for potential LEU conversion of the Budapest Research Reactor.  

SciTech Connect

An initial safety study for potential LEU conversion of the Budapest Research Reactor was completed. The study compares safety parameters and example transients for reactor cores with HEU and LEU fuels. Reactivity coefficients, kinetic parameters and control rod worths were calculated for cores with HEU(36%) UAl alloy fuel and UO{sub 2}-Al dispersion fuel, and with LEU (19.75%)UO{sub 2}-Al dispersion fuel that has a uranium density of about 2.5 g/cm{sup 3}. A preliminary fuel conversion plan was developed for transition cores that would convert the BRR from HEU to LEU fuel after the process is begun.

Pond, R. B.; Hanan, N. A.; Matos, J. E.; Maraczy, C.

1999-09-27T23:59:59.000Z

416

Search for Differences in Oscillation Parameters for Atmospheric Neutrinos and Antineutrinos at Super-Kamiokande  

E-Print Network (OSTI)

We present a search for differences in the oscillations of antineutrinos and neutrinos in the Super-Kamiokande -I, -II, and -III atmospheric neutrino sample. Under a two-flavor disappearance model with separate mixing parameters between neutrinos and antineutrinos, we find no evidence for a difference in oscillation parameters. Best fit antineutrino mixing is found to be at (dm2bar, sin2 2 thetabar) = (2.0x10^-3 eV^2, 1.0) and is consistent with the overall Super-K measurement.

Super-Kamiokande Collaboration; :; K. Abe; Y. Hayato; T. Iida; M. Ikeda; K. Iyogi; J. Kameda; Y. Koshio; Y. Kozuma; M. Miura; S. Moriyama; M. Nakahata; S. Nakayama; Y. Obayashi; H. Sekiya; M. Shiozawa; Y. Suzuki; A. Takeda; Y. Takenaga; Y. Takeuchi; K. Ueno; K. Ueshima; H. Watanabe; S. Yamada; T. Yokozawa; C. Ishihara; H. Kaji; K. P. Lee; T. Kajita; K. Kaneyuki; T. McLachlan; K. Okumura; Y. Shimizu; N. Tanimoto; K. Martens; M. R. Vagins; L. Labarga; L. M. Magro; F. Dufour; E. Kearns; M. Litos; J. L. Raaf; J. L. Stone; L. R. Sulak; M. Goldhaber; K. Bays; W. R. Kropp; S. Mine; C. Regis; M. B. Smy; H. W. Sobel; K. S. Ganezer; J. Hill; W. E. Keig; J. S. Jang; J. Y. Kim; I. T. Lim; J. B. Albert; K. Scholberg; C. W. Walter; R. Wendell; T. M. Wongjirad; S. Tasaka; J. G. Learned; S. Matsuno; T. Hasegawa; T. Ishida; T. Ishii; T. Kobayashi; T. Nakadaira; K. Nakamura; K. Nishikawa; H. Nishino; Y. Oyama; K. Sakashita; T. Sekiguchi; T. Tsukamoto; A. T. Suzuki; A. Minamino; T. Nakaya; Y. Fukuda; Y. Itow; G. Mitsuka; T. Tanaka; C. K. Jung; I. Taylor; C. Yanagisawa; H. Ishino; A. Kibayashi; S. Mino; T. Mori; M. Sakuda; H. Toyota; Y. Kuno; S. B. Kim; B. S. Yang; T. Ishizuka; H. Okazawa; Y. Choi; K. Nishijima; M. Koshiba; M. Yokoyama; Y. Totsuka; S. Chen; Y. Heng; Z. Yang; H. Zhang; D. Kielczewska; P. Mijakowski; K. Connolly; M. Dziomba; R. J. Wilkes

2011-09-08T23:59:59.000Z

417

Effect of design parameter changes on the performance of thermal storage wall passive systems  

DOE Green Energy (OSTI)

Hour-by-hour computer simulations based on one year of solar radiation and temperature data are used to analyze annual energy savings in thermal storage wall passive designs, both Trombe wall and water wall cases. The calculations are rerun many times changing various parameters one at a time to assess the effect on performance. Parameters analyzed are: night insulation R-value, number of glazings, wall absorptance and emittance, thermal storage capacity, Trombe wall properties and vent area size, additional building mass, and temperature control set points. Calculations are done for eight cities.

McFarland, R.D.; Balcomb, J.D.

1979-01-01T23:59:59.000Z

418

Sensitivity of Surface Flux Simulations to Hydrologic Parameters Based on an Uncertainty Quantification Framework Applied to the Community Land Model  

SciTech Connect

Uncertainties in hydrologic parameters could have significant impacts on the simulated water and energy fluxes and land surface states, which will in turn affect atmospheric processes and the carbon cycle. Quantifying such uncertainties is an important step toward better understanding and quantification of uncertainty of integrated earth system models. In this paper, we introduce an uncertainty quantification (UQ) framework to analyze sensitivity of simulated surface fluxes to selected hydrologic parameters in the Community Land Model (CLM4) through forward modeling. Thirteen flux tower footprints spanning a wide range of climate and site conditions were selected to perform sensitivity analyses by perturbing the parameters identified. In the UQ framework, prior information about the parameters was used to quantify the input uncertainty using the Minimum-Relative-Entropy approach. The quasi-Monte Carlo approach was applied to generate samples of parameters on the basis of the prior pdfs. Simulations corresponding to sampled parameter sets were used to generate response curves and response surfaces and statistical tests were used to rank the significance of the parameters for output responses including latent (LH) and sensible heat (SH) fluxes. Overall, the CLM4 simulated LH and SH show the largest sensitivity to subsurface runoff generation parameters. However, study sites with deep root vegetation are also affected by surface runoff parameters, while sites with shallow root zones are also sensitive to the vadose zone soil water parameters. Generally, sites with finer soil texture and shallower rooting systems tend to have larger sensitivity of outputs to the parameters. Our results suggest the necessity of and possible ways for parameter inversion/calibration using available measurements of latent/sensible heat fluxes to obtain the optimal parameter set for CLM4. This study also provided guidance on reduction of parameter set dimensionality and parameter calibration framework design for CLM4 and other land surface models under different hydrologic and climatic regimes.

Hou, Zhangshuan; Huang, Maoyi; Leung, Lai-Yung R.; Lin, Guang; Ricciuto, Daniel M.

2012-08-10T23:59:59.000Z

419

Single and double frame coding of speech LPC parameters using a lattice-based quantization scheme  

Science Conference Proceedings (OSTI)

A lattice-based scheme for the single-frame and the double-frame quantization of the speech line spectral frequency parameters is proposed. The lattice structure provides a low-complexity vector quantization framework, which is implemented using a trellis ... Keywords: CELP, LPC, LSF, interframe coding, intraframe coding, lattice-based quantization, quantization, speech coding

F. Lahouti; A. R. Fazel; A. H. Safavi-Naeini; A. K. Khandani

2006-09-01T23:59:59.000Z

420

A method for determining the parameters of blast load on the enclosing medium and surrounding objects  

Science Conference Proceedings (OSTI)

A model for computing the impact of blast energy irradiated into the three-dimensional space of the enclosing medium is suggested, which makes it possible to predict the parameters of the action of an arbitrary blast source on an arbitrarily located watched object. As a consequence, it becomes possible to optimize safe conditions of the building process under virtually any conditions of blasting.

Shuifer, M. I. ['SPII Gidrospetsproekt' Company (Russian Federation)

2006-01-15T23:59:59.000Z

Note: This page contains sample records for the topic "tox parameter tox" 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

Through-the-electrode model of a proton exchange membrane fuel cell with independently measured parameters  

DOE Green Energy (OSTI)

A one dimensional model for a proton exchange membrane fuel cell was developed which makes use of independently measured parameters for predicting single cell performance. Optimization of catalyst layer formulation and properties are explored. Impact of temperature and cathode pressure upon system performance was investigated.

Weisbrod, K.R.; Grot, S.A.; Vanderborgh, N.E.

1995-05-01T23:59:59.000Z

422

Detecting giant solar flares based on sunspot parameters using bayesian networks  

Science Conference Proceedings (OSTI)

This paper presents the use of Bayesian Networks (BN) in a new area, the detection of solar flares. The paper describes how to learn a Bayesian Network (BN) using a set of variables representing sunspots parameters such that the BN can detect and classify ... Keywords: bayesian networks, forecast systems, fusion of information, solar flares, sunspot

Tatiana Raffaelli; Adriana V. R. Silva; Maurício Marengoni

2006-12-01T23:59:59.000Z

423

Dispersion equation and eigenvalues for quantum wells using spectral parameter power series  

Science Conference Proceedings (OSTI)

We derive a dispersion equation for determining eigenvalues of inhomogeneous quantum wells in terms of spectral parameter power series and apply it for the numerical treatment of eigenvalue problems. The method is algorithmically simple and can be easily implemented using available routines of such environments for scientific computing as MATLAB.

Castillo-Perez, Raul; Oviedo-Galdeano, Hector; Rabinovich, Vladimir S. [SEPI, ESIME, National Polytechnic Institute, Av. IPN S/N, C.P. 07738, Mexico City (Mexico); Kravchenko, Vladislav V. [Department of Mathematics, CINVESTAV del IPN, Campus Queretaro, Apartado Postal 1-798, Arteaga 5, Col. Centro, Santiago de Queretaro, Qro., 76001 (Mexico)

2011-04-15T23:59:59.000Z

424

Parameter identification and model verification in systems of partial differential equations applied to transdermal drug delivery  

Science Conference Proceedings (OSTI)

The purpose of this paper is to present some numerical tools which facilitate the interpretation of simulation or data fitting results and which allow computation of optimal experimental designs. They help to validate mathematical models describing the ... Keywords: Confidence interval, Optimum experimental design, Parameter estimation, Partial differential equation, Transdermal application

Klaus Schittkowski

2008-12-01T23:59:59.000Z

425

Exploring the parameter space of disc shaped silver nanoparticles for thin film silicon photovoltaics  

E-Print Network (OSTI)

We numerically simulate, using finite-difference time-domain, the optical properties of silver nano discs deposited on the front surface of silicon solar cells. We explore the effect of each of the parameters of such a system, in order to draw some general design rules for the subsequent fabrication of such structures.

Figeys, Bruno

2011-01-01T23:59:59.000Z

426

Substate Tying With Combined Parameter Training and Reduction in Tied-Mixture HMM Design  

E-Print Network (OSTI)

Two approaches are proposed for the design of tied-mixture hidden Markov models (TMHMM). One approach improves parameter sharing via partial tying of TMHMM states. To facilitate tying at the substate level, the state emission probabilities are constructed in two stages or, equivalently, are viewed as a "mixture of mixtures of Gaussians." This paradigm allows, and is complemented with, an optimization technique to seek the best complexity-accuracy tradeoff solution, which jointly exploits Gaussian density sharing and substate tying. Another approach to enhance model training is combined training and reduction of model parameters. The procedure starts by training a system with a large universal codebook of Gaussian densities. It then iteratively reduces the size of both the codebook and the mixing coefficient matrix, followed by parameter re-training. The additional cost in design complexity is modest. Experimental results on the ISOLET database and its E-set subset show that substate tying reduces the classification error rate by over 15%, compared to standard Gaussian sharing and whole-state tying. TMHMM design with combined training and reduction of parameters reduces the classification error rate by over 20% compared to conventional TMHMM design. When the two proposed approaches were integrated, 25% error rate reduction over TMHMM with whole-state tying was achieved.

Liang Gu; Kenneth Rose; Senior Member

2002-01-01T23:59:59.000Z

427

Sum-of-superellipses: a low parameter model for amplitude spectra of natural images  

Science Conference Proceedings (OSTI)

Amplitude spectra of natural images look surprisingly alike. Their shape is governed by the famous 1/f power law. In this work we propose a novel low parameter model for describing these spectra. The Sum-of-Superellipses conserves their common ... Keywords: amplitude spectrum, image retrieval, image statistics, lamé curve, natural images, superellipse

Marcel Spehr; Stefan Gumhold; Roland W. Fleming

2011-09-01T23:59:59.000Z

428

Analytical modeling and parameter extraction of top and bottom contact structures of organic thin film transistors  

Science Conference Proceedings (OSTI)

This paper proposes a structure based model of an organic thin film transistor (OTFT) and analyzes its device physics. The analytical model is developed for the top contact structure by mapping the overlap region to the resistance (in the vertical direction) ... Keywords: Analytical modeling, Contact resistance, Organic thin film transistor, Overlap region, Parameter extraction, Top and bottom contact structure, Vertical resistance

Brijesh Kumar, B. K. Kaushik, Y. S. Negi, S. Saxena, G. D. Varma

2013-09-01T23:59:59.000Z

429

Statistical timing analysis using levelized covariance propagation considering systematic and random variations of process parameters  

Science Conference Proceedings (OSTI)

Variability in process parameters is making accurate timing analysis of nano-scale integrated circuits an extremely challenging task. In this article, we propose a new algorithm for statistical static timing analysis (SSTA) using levelized covariance ... Keywords: Process variation, spatial correlation, statistical timing analysis

Kunhyuk Kang; Bipul C. Paul; Kaushik Roy

2006-10-01T23:59:59.000Z

430

Analyzing Combined Impacts of Parameter Variations and BTI in Nano-scale Logical Gates  

E-Print Network (OSTI)

Analyzing Combined Impacts of Parameter Variations and BTI in Nano-scale Logical Gates Seyab Khan conclusions. 2 Background and Analysis Framework Fig. 1(a) shows the threshold voltage increment (Vth) due variation, delay model, and presents the analysis framework. First MEDIAN Workshop 2012 7 #12;2 Seyab Khan

Hamdioui, Said

431

The improved technique of electric and magnetic parameters measurements of powdered materials  

Science Conference Proceedings (OSTI)

This paper presents the measurement technique that allows to determine the relative permittivity and permeability of powdered materials. Measurements are realized in a coaxial transmission line which guarantees the broad band frequency characterization. ... Keywords: Absorbing materials, Magnetic materials, Microwave measurements, Permittivity and permeability measurements, Powdered ferrite measurements, Scattering parameters

Roman Kubacki; Leszek Nowosielski; Rafa? Przesmycki

2011-11-01T23:59:59.000Z

432

Estimating home energy decision parameters for a hybrid energyYeconomy policy model  

E-Print Network (OSTI)

Estimating home energy decision parameters for a hybrid energyYeconomy policy model Mark JaccardYenvironment policy models To meet the challenge of an energyYenvironment issue such as greenhouse gas (GHG) emission with respect to energy use, and to specific policies aimed at advancing certain technologies over others. While

433

Structural Design and Parameter Research on the Biomass Direct-fired Stirling Engine  

Science Conference Proceedings (OSTI)

It makes a brief description of the forms and main parameters of the ? Stirling engine with the rhombic drive mechanism. The paper makes a deep analysis and found mathematical models on the cycle performance of ? Stirling engine, illustrates ... Keywords: Stirling engine, biomass, direct-fired, rhombic driving mechanism, performance simulation

Xu Zhang; Yan Ma

2010-08-01T23:59:59.000Z

434

The Maximum-Likelihood Property of Estimators of Wave Parameters from Heave, Pitch, and Roll Buoys  

Science Conference Proceedings (OSTI)

It is shown that ocean-wave spectrum parameters obtained from spectra of time series measured with heave, pitch, and roll data buoys are maximum-likelihood (ML) estimators under certain assumptions about the wave field. A modified set of ML ...

Ingrid K. Glad; Harald E. Krogstad

1992-04-01T23:59:59.000Z

435

Joint symbol detection and channel parameter estimation in asynchronous DS-CDMA systems  

Science Conference Proceedings (OSTI)

A method for jointly estimating the time delay and complex gain parameters, as well as detecting the transmitted symbols in an asynchronous multipath DS-CDMA system, is presented. A short training sequence is used to obtain a coarse estimate of the channel ...

A. Ranheim; P. Pelin

2000-02-01T23:59:59.000Z

436

Analysis of Relationship between Efficiency and Motion Parameters of Robotic Fish  

Science Conference Proceedings (OSTI)

More and more researchers draw attention on Robot fish and obtain considerable achievement. This paper focused on the dynamics of Robot fish’s foil and established the locomotion modeling of Robot fish. This paper also investigated the relationship ... Keywords: robot fish, dynamicse, modeling, parameter

Jinghu Yu; Cao Yi

2009-08-01T23:59:59.000Z

437

Combining Parameter Space Search and Meta-learning for Data-Dependent Computational Agent Recommendation  

Science Conference Proceedings (OSTI)

The goal of our data-mining multi-agent system is to facilitate data-mining experiments without the necessary knowledge of the most suitable machine learning method and its parameters to the data. In order to replace the expertâ??s knowledge, the ... Keywords: meta-learning, data-mining, multi-agent systems

Ondrej Kazik; Klara Peskova; Martin Pilat; Roman Neruda

2012-12-01T23:59:59.000Z

438

Influence of combustion parameters on NOx production in an industrial boiler  

E-Print Network (OSTI)

Influence of combustion parameters on NOx production in an industrial boiler M.A. Habib a,*, M; accepted 14 April 2007 Available online 24 June 2007 Abstract NOx formation during the combustion process occurs mainly through the oxidation of nitrogen in the combustion air (thermal NOx) and through oxidation

Aldajani, Mansour A.

439

Energy and centrality dependence of chemical freeze-out parameters from models  

E-Print Network (OSTI)

One of the main goals of heavy-ion collision experiments is to study the structure of the QCD phase diagram. The QCD phase diagram is typically plotted as temperature ($T$) vs. baryon chemical potential ($\\mu_{B}$). The statistical thermal model THERMUS compared to experimental data provides chemical freeze-out parameters such as temperature, baryon chemical potential and strangeness saturation factor ($\\gamma_{s}$). However, the values of these parameters depend on models and their underlying assumptions, such as the nature of the ensemble used, particle ratios vs. particle yields, and the treatment of feed-down contributions to particle yields. In these proceedings, we report on a systematic study of chemical freeze-out parameters using THERMUS, as a function of collision centrality and collision energies ($\\sqrt{s_{NN}} =7.7-200$ GeV). These studies are performed with the string melting version of A Multi-Phase Transport (AMPT) model. A comparison is presented of freeze-out parameters between grand-canonical vs. strangeness canonical ensembles, particle yields vs. ratios, with and without feed-down contributions to the particle yields. The main aim is to evaluate the sensitivity of the thermal model fits to various model assumptions. This is an important study for understanding corresponding experimental results from the beam energy scan program at RHIC.

Lokesh Kumar

2013-08-14T23:59:59.000Z

440

Sample-based collection and adjustment algorithm for metadata extraction parameter of flexible format document  

Science Conference Proceedings (OSTI)

We propose an algorithm for automatically generating metadata extraction parameters. It first enumerates candidates on the basis of metadata occurrence in training documents, and then examines these candidates to avoid side effects and to maximize effectiveness. ... Keywords: keyword extraction, layout characteristics, logical structure analysis, metadata extraction

Toshiko Matsumoto; Mitsuharu Oba; Takashi Onoyama

2010-06-01T23:59:59.000Z

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


441

Aeration control and parameter soft estimation for a wastewater treatment plant using a neurogenetic design  

Science Conference Proceedings (OSTI)

Biochemical oxygen demand and chemical oxygen demand are the most important parameters for wastewater management and planning, which represents the oxygen consumption from degradation of organic material. Insufficient levels of dissolved oxygen prevent ... Keywords: aeration optimal control, artificial neural networks, genetic algorithms, wastewater process

Javier Fernandez de Canete; Pablo del Saz-Orozco; Inmaculada Garcia-Moral

2011-06-01T23:59:59.000Z

442

Post-processing of seismic parameter data based on valid seismic event determination  

DOE Patents (OSTI)

An automated seismic processing system and method are disclosed, including an array of CMOS microprocessors for unattended battery-powered processing of a multi-station network. According to a characterizing feature of the invention, each channel of the network is independently operable to automatically detect, measure times and amplitudes, and compute and fit Fast Fourier transforms (FFT's) for both P- and S- waves on analog seismic data after it has been sampled at a given rate. The measured parameter data from each channel are then reviewed for event validity by a central controlling microprocessor and if determined by preset criteria to constitute a valid event, the parameter data are passed to an analysis computer for calculation of hypocenter location, running b-values, source parameters, event count, P- wave polarities, moment-tensor inversion, and Vp/Vs ratios. The in-field real-time analysis of data maximizes the efficiency of microearthquake surveys allowing flexibility in experimental procedures, with a minimum of traditional labor-intensive postprocessing. A unique consequence of the system is that none of the original data (i.e., the sensor analog output signals) are necessarily saved after computation, but rather, the numerical parameters generated by the automatic analysis are the sole output of the automated seismic processor.

McEvilly, Thomas V. (733 Alvarado Rd., Berkeley, CA 94705)

1985-01-01T23:59:59.000Z

443

Context-aware parameter estimation for forecast models in the energy domain  

Science Conference Proceedings (OSTI)

Continuous balancing of energy demand and supply is a fundamental prerequisite for the stability and efficiency of energy grids. This balancing task requires accurate forecasts of future electricity consumption and production at any point in time. For ... Keywords: energy, forecasting, maintenance, parameter estimation

Lars Dannecker; Robert Schulze; Matthias Böhm; Wolfgang Lehner; Gregor Hackenbroich

2011-07-01T23:59:59.000Z

444

Type I intermittency in a dynamical system with dichotomous parameter change  

E-Print Network (OSTI)

In type I intermittency, simple models known for at least twenty years show that a characteristic u-shaped probability distribution is obtained for the laminar phase length. We have shown elsewhere that, for some cases of pathology, the laminar phase length distribution characteristic for type I intermittency may be obtained in human heart rate variability data. The heart and its regulatory systems are presumed to be both noisy and nonstationary. Although the effect of additive noise on the laminar phase distribution in type I intermittency is well known, neither the effect of multiplicative noise nor of nonstationarity (i.e. changes of the control parameter with the time) have been studied. In this paper, we first discuss the properties of two classes of models of type I intermittency: a) the control parameter of the logistic map is changed dichotomously from a value within the intermittency range to just below the bifurcation point and back; b) the control parameter is changed randomly within the same parameter range as in the model class a). We show that the properties of both models are importantly different from those obtained for type I intermittency in the presence additive noise as obtained by Hirsch twenty years ago. The two models help explain some of the features seen in the intermittency in human heart rate variability.

J. J. Zebrowski; R. Baranowski

2004-09-22T23:59:59.000Z

445

Optimization of Parameters of the Chemic Kinetic Model by Improved Genetic Algorithms  

Science Conference Proceedings (OSTI)

Detailed kinetic model is one of the most important basic research items that the chemic synthesis techniques will have been commercialized from laboratory. A great breakthrough has been made in the detailed mechanistic kinetics of the chemic synthesis, ... Keywords: Genetic Algorithm, kinetic model, parameter

Rui-feng Han; Yu-li Yang; Yong-kui Zhang

2009-01-01T23:59:59.000Z

446

An electromagnetic and thermodynamic lumped parameter model of an explosively driven regenerative magnetohydrodynamic generator  

DOE Green Energy (OSTI)

The objective of this research is to develop a simple, yet accurate, lumped parameter mathematical model for an explosively driven magnetohydrodynamic generator that can predict the pulse power variables of voltage and current from startup through regenerative operation. The inputs to the model will be the plasma properties entering the generator as predicted by the explosive shock model of Reference [1]. The strategy used was to simplify electromagnetic and thermodynamic three dimensional effects into a zero dimensional model. The model will provide a convenient tool for researchers to optimize designs to be used in pulse power applications. The model is validated using experimental data of Reference [1]. An overview of the operation of the explosively driven generator is first presented. Then a simplified electrical circuit model that describes basic performance of the device is developed. Then a lumped parameter model that incorporates the coupled electromagnetic and thermodynamic effects that govern generator performance is described and developed. The model is based on fundamental physical principles and parameters that were either obtained directly from design data or estimated from experimental data. The model was used to obtain parameter sensitivities and predict beyond the limits observed in the experiments to the levels desired by the potential Department of Defense sponsors. The model identifies process limitations that provide direction for future research.

Morrison, J.L.

1992-12-01T23:59:59.000Z

447

Through-the-electrode model of a proton exchange membrane fuel cell with independently measured parameters  

DOE Green Energy (OSTI)

A one dimensional model for a proton exchange membrane fuel cell was developed which makes use of independently measured parameters for predicting single cell performance. Optimization of catalyst layer formulation and properties are explored. Impact of temperature and cathode pressure upon system performance is investigated.

Weisbrod, K.R.; Grot, S.A.; Vandergborgh, N.E.

1995-09-01T23:59:59.000Z

448

An efficient integrated approach for global sensitivity analysis of hydrological model parameters  

Science Conference Proceedings (OSTI)

Efficient sensitivity analysis, particularly for the global sensitivity analysis (GSA) to identify the most important or sensitive parameters, is crucial for understanding complex hydrological models, e.g., distributed hydrological models. In this paper, ... Keywords: DTVGM, Global sensitivity analysis, RSMSobol' method, Response surface model, Statistical emulator

Che-Sheng Zhan; Xiao-Meng Song; Jun Xia; Charles Tong

2013-03-01T23:59:59.000Z

449

Improved Fixed-Parameter Algorithms for Minimum-Flip Consensus Trees  

Science Conference Proceedings (OSTI)

In computational phylogenetics, the problem of constructing a consensus tree for a given set of rooted input trees has frequently been addressed. In this article we study the Minimum-Flip Problem: the input trees are transformed into a binary ... Keywords: Phylogenetics, consensus tree, fixed-parameter algorithm

Sebastian Böcker; Quang Bao Anh Bui; Anke Truss

2012-01-01T23:59:59.000Z

450

Estimation of the parameters of life for Gompertz distribution using progressive first-failure censored data  

Science Conference Proceedings (OSTI)

Bayes and frequentist estimators are obtained for the two-parameter Gompertz distribution (GD), as well as the reliability and hazard rate functions, using progressive first-failure censoring plan. We have examined Bayes estimates under symmetric and ... Keywords: Bayesian estimator, Confidence intervals, Confidence regions, Gompertz distribution, Maximum likelihood estimator, Progressive first-failure censoring scheme, Symmetric and asymmetric loss functions

Ahmed A. Soliman; Ahmed H. Abd-Ellah; Naser A. Abou-Elheggag; Gamal A. Abd-Elmougod

2012-08-01T23:59:59.000Z

451

Decomposing parameters of mixture Gaussian model using genetic and maximum likelihood algorithms on dental images  

Science Conference Proceedings (OSTI)

We present new approaches based on Genetic Algorithms (GAs), Simulated Annealing (SA) and Expectation Maximization (EM) for determining parameters of the mixture Gaussian model. GAs are adaptive search techniques designed to search for near-optimal solutions ... Keywords: Expectation maximization, Genetic algorithms, Mixture Gaussian model, Simulated annealing

Nariman Majdi-Nasab; Mostafa Analoui; Edward J. Delp

2006-10-01T23:59:59.000Z

452

Operational plasma density and laser parameters for future colliders based on laser-plasma accelerators  

SciTech Connect

The operational plasma density and laser parameters for future colliders based on laser-plasma accelerators are discussed. Beamstrahlung limits the charge per bunch at low plasma densities. Reduced laser intensity is examined to improve accelerator efficiency in the beamstrahlung-limited regime.

Schroeder, C. B.; Esarey, E.; Leemans, W. P. [Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States)

2012-12-21T23:59:59.000Z

453

Graphics hardware implementation of the parameter-less self-organising map  

Science Conference Proceedings (OSTI)

This paper presents a highly parallel implementation of a new type of Self-Organising Map (SOM) using graphics hardware. The Parameter-Less SOM smoothly adapts to new data while preserving the mapping formed by previous data. It is therefore in principle ...

Alexander Campbell; Erik Berglund; Alexander Streit

2005-07-01T23:59:59.000Z

454

Automated Retrievals of Precipitation Parameters Using Non-Rayleigh Scattering at 95 GHz  

Science Conference Proceedings (OSTI)

Automated retrievals of vertical air motion and the drop size distribution (DSD) slope parameter from the surface to the base of the melting layer are presented using a technique for W-band (95 GHz) profiling radars. The technique capitalizes on ...

Scott E. Giangrande; Edward P. Luke; Pavlos Kollias

2010-09-01T23:59:59.000Z

455

Spectral Impact of Low-Power Laser Radiation on Wheat and Maize Parameters*  

E-Print Network (OSTI)

and development of plants. The additionally absorbed light energy accelerates plant growth and increases7 4 Spectral Impact of Low-Power Laser Radiation on Wheat and Maize Parameters* St. Dinoev, M density, can be used not only in all spheres of engineering but also in biology and plant growing

Borissova, Daniela

456

On-line parameter estimation of PMSM in open loop and closed loop  

Science Conference Proceedings (OSTI)

The paper discusses the multi-models approach for on-line parameter estimation of permanent magnet synchronous motor (PMSM). The study is focused on a PMSM with non sinusoidal electromotive force (emf) in open loop and closed loop conditions. The electrical ...

Makara Khov; Jeremi Regnier; Jean Faucher

2009-02-01T23:59:59.000Z

457

A condition-based maintenance policy and input parameters estimation for deteriorating systems under periodic inspection  

Science Conference Proceedings (OSTI)

This paper combines an optimization model and input parameters estimation from empirical data, in order to propose condition-based maintenance policies. The system deterioration is described by discrete states ordered from the state ''as good as new'' ... Keywords: Condition-based maintenance, Decision-making under uncertainty, Hidden Markov Models, Optimal control, Stochastic-dynamic programming

Maxstaley L. Neves; Leonardo P. Santiago; Carlos A. Maia

2011-10-01T23:59:59.000Z

458

Order Parameters for Detecting Target Curves in Images: When Does High Level Knowledge Help?  

Science Conference Proceedings (OSTI)

Many problems in vision can be formulated as Bayesian inference. It is important to determine the accuracy of these inferences and how they depend on the problem domain. In this paper, we provide a theoretical framework based on Bayesian decision theory ... Keywords: Bayesian inference, curve detection, minimax entropy, order parameters

A. L. Yuille; James M. Coughlan; Yingnian Wu; Song Chun Zhu

2001-01-01T23:59:59.000Z

459

The Usage of Screen-Level Parameters and Microwave Brightness Temperature for Soil Moisture Analysis  

Science Conference Proceedings (OSTI)

This study focuses on testing two different soil moisture analysis systems based on screen-level parameters (2-m temperature T2m, 2-m relative humidity RH2m) and 1.4-GHz passive microwave brightness temperatures TB. First, a simplified extended ...

G. Seuffert; H. Wilker; P. Viterbo; M. Drusch; J-F. Mahfouf

2004-06-01T23:59:59.000Z

460

Outline The Ensemble Kalman Filter Parameter estimation Test example Conclusion History matching via  

E-Print Network (OSTI)

Outline The Ensemble Kalman Filter Parameter estimation Test example Conclusion History matching estimation Test example Conclusion Test case setup · For the test case we use CERE's own in-house Black Oil estimation Test example Conclusion Test case setup · For the test case we use CERE's own in-house Black Oil

Mosegaard, Klaus

Note: This page contains sample records for the topic "tox parameter tox" 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
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461

Impact of lattice geometry distortion due to ageing on selected physics parameters of a CANDU reactor  

SciTech Connect

In this paper, results related to a limited scope assessment of the geometry-distortion-induced effects on key reactor physics parameters of a CANDU reactor are discussed. These results were generated by simulations using refined analytical methods and detailed modeling of CANDU reactor core with aged lattice cell geometry. (authors)

Tholammakkil, J. [Canadian Nuclear Safety Commission, P.O. Box 1046, Ottawa, Ont. (Canada); Rahnema, F. [Georgia Inst. of Technology, Atlanta, GA 30332-0405 (United States); Ilas, G. [Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831 (United States); Stamm'ler, R. [Studsvik Scandpower AS, P.O. Box 15, NO-2027 Kjeller (Norway); Khotylev, V.; Serghiuta, D. [Canadian Nuclear Safety Commission, P.O. Box 1046, Ottawa, Ont. (Canada)

2006-07-01T23:59:59.000Z

462

Damage detection by an adaptive real-parameter simulated annealing genetic algorithm  

Science Conference Proceedings (OSTI)

An effective algorithm, which combined an adaptive real-parameter genetic algorithm with simulated annealing, is proposed to detect damage occurrence in beam-type structures. The proposed algorithm uses the displacements of static response and natural ... Keywords: Adaptive mechanism, Damage detection, Genetic algorithm, Optimization, Simulated annealing

Rong-Song He; Shun-Fa Hwang

2006-12-01T23:59:59.000Z

463

Mapping Surface Parameters for Mesoscale Modeling in Forested and Deforested Southwestern Amazonia  

Science Conference Proceedings (OSTI)

Surface parameter digital maps of vegetation, soil, and relief are obtained over Rondônia, Brazil, covering the 5° × 5° region 8°–13°S, 65°–60°W. Numerical maps of the natural landscape structure have been achieved by digitizing existing 1:1 000 ...

Jean-Christophe Calvet; Regina Santos-Alvalá; Geneviève Jaubert; Christine Delire; Carlos Nobre; Ivan Wright; Joël Noilhan

1997-03-01T23:59:59.000Z

464

Parameter and Hyperparameter Estimation in a Probabilistic Model of Information Retrieval  

E-Print Network (OSTI)

Parameter and Hyperparameter Estimation in a Probabilistic Model of Information Retrieval Bin Wu for information retrieval (IR). The documents, queries and relevancy assessment are modeled with explicit retrieval (IR) studies the problem of #12;nding some information from an information storage in response

Wong, Michael K Y

465

A direct search method for determination of DAEM kinetic parameters from nonisothermal TGA data (note)  

Science Conference Proceedings (OSTI)

In this study, a simple direct search method to be used for the determination of distributed activation energy model (DAEM) kinetic parameters from the nonisothermal thermogravimetric analysis (TGA) data of coals has been introduced. Process steps of ... Keywords: curve fitting, direct search technique, distributed activation energy model (DAEM), thermogravimetric analysis data (TGA)

Mustafa Güne?; Semin Güne?

2002-08-01T23:59:59.000Z

466

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

467

Modified Hubble law, the time-varying Hubble parameter and the problem of dark energy  

E-Print Network (OSTI)

In the framework of the solvable model of cosmology constructed in the Earth-related coordinate system, we derive the modified Hubble law. This law carries the slowly time-varying Hubble parameter. The modified Hubble law eliminates the need for dark energy.

Jian-Miin Liu

2005-07-04T23:59:59.000Z

468

Assessing FPAR Source and Parameter Optimization Scheme in Application of a Diagnostic Carbon Flux Model  

Science Conference Proceedings (OSTI)

The combination of satellite remote sensing and carbon cycle models provides an opportunity for regional to global scale monitoring of terrestrial gross primary production, ecosystem respiration, and net ecosystem production. FPAR (the fraction of photosynthetically active radiation absorbed by the plant canopy) is a critical input to diagnostic models, however little is known about the relative effectiveness of FPAR products from different satellite sensors nor about the sensitivity of flux estimates to different parameterization approaches. In this study, we used multiyear observations of carbon flux at four eddy covariance flux tower sites within the conifer biome to evaluate these factors. FPAR products from the MODIS and SeaWiFS sensors, and the effects of single site vs. cross-site parameter optimization were tested with the CFLUX model. The SeaWiFs FPAR product showed greater dynamic range across sites and resulted in slightly reduced flux estimation errors relative to the MODIS product when using cross-site optimization. With site-specific parameter optimization, the flux model was effective in capturing seasonal and interannual variation in the carbon fluxes at these sites. The cross-site prediction errors were lower when using parameters from a cross-site optimization compared to parameter sets from optimization at single sites. These results support the practice of multisite optimization within a biome for parameterization of diagnostic carbon flux models.

Turner, D P; Ritts, W D; Wharton, S; Thomas, C; Monson, R; Black, T A

2009-02-26T23:59:59.000Z

469

Definition of parameters for quality assurance of flattening filter free (FFF) photon beams in radiation therapy  

SciTech Connect

Purpose: Flattening filter free (FFF) beams generated by medical linear accelerators have recently started to be used in radiotherapy clinical practice. Such beams present fundamental differences with respect to the standard filter flattened (FF) beams, making the generally used dosimetric parameters and definitions not always viable. The present study will propose possible definitions and suggestions for some dosimetric parameters for use in quality assurance of FFF beams generated by medical linacs in radiotherapy. Methods: The main characteristics of the photon beams have been analyzed using specific data generated by a Varian TrueBeam linac having both FFF and FF beams of 6 and 10 MV energy, respectively. Results: Definitions for dose profile parameters are suggested starting from the renormalization of the FFF with respect to the corresponding FF beam. From this point the flatness concept has been translated into one of 'unflatness' and other definitions have been proposed, maintaining a strict parallelism between FFF and FF parameter concepts. Conclusions: Ideas for quality controls used in establishing a quality assurance program when introducing FFF beams into the clinical environment are given here, keeping them similar to those used for standard FF beams. By following the suggestions in this report, the authors foresee that the introduction of FFF beams into a clinical radiotherapy environment will be as safe and well controlled as standard beam modalities using the existing guidelines.

Fogliata, A.; Garcia, R.; Knoeoes, T.; Nicolini, G.; Clivio, A.; Vanetti, E.; Khamphan, C.; Cozzi, L. [Oncology Institute of Southern Switzerland, Medical Physics Unit, Bellinzona CH-6500 (Switzerland); Institut Sainte Catherine, Medical Physics Unit, Avignon F-84000 (France); Radiation Physics, Skane University Hospital, Lund S-22185, Sweden and Department of Medical Radiation Physics, Lund University, Lund S-22185 (Sweden); Oncology Institute of Southern Switzerland, Medical Physics Unit, Bellinzona CH-6500 (Switzerland); Institut Sainte Catherine, Medical Physics Unit, Avignon F-84000 (France); Oncology Institute of Southern Switzerland, Medical Physics Unit, Bellinzona CH-6500 (Switzerland)

2012-10-15T23:59:59.000Z

470

Joint cosmological parameters forecast from CFHTLS-cosmic shear and CMB data  

E-Print Network (OSTI)

We present a prospective analysis of a combined cosmic shear and cosmic microwave background data set, focusing on a Canada France Hawaii Telescope Legacy Survey (CFHTLS) type lensing survey and the current WMAP-1 year and CBI data. We investigate the parameter degeneracies and error estimates of a seven parameters model, for the lensing alone as well as for the combined experiments. The analysis is performed using a Monte Carlo Markov Chain calculation, allowing for a more realistic estimate of errors and degeneracies than a Fisher matrix approach. After a detailed discussion of the relevant statistical techniques, the set of the most relevant 2 and 3-dimensional lensing contours are given. It is shown that the combined cosmic shear and CMB is particularly efficient to break some parameter degeneracies. The principal components directions are computed and it is found that the most orthogonal contours between the two experiments are for the parameter pairs (Omega_m,sigma_8), (h,ns) and (ns,nrun), where ns and nrun are the slope of the primordial mass power spectrum and the running spectral index respectively. It is shown that an improvement of a factor 2 is expected on the running spectral index from the combined data sets. Forecasts for error improvements from a wide field space telescope lensing survey are also given.

I. Tereno; O. Doré; L. van Waerbeke; Y. Mellier

2004-04-15T23:59:59.000Z

471

Some Practical Notes on the Parameter kB?1 for Sparse Vegetation  

Science Conference Proceedings (OSTI)

This paper deals with the parameter kB?1, the logarithm of the ratio between momentum and heat roughness length, of sparsely vegetated surfaces and bare soil. The bare soil surface is included as a reference, since it is fairly homogenous and ...

A. Verhoef; H. A. R. De Bruin; B. J. J. M. Van Den Hurk

1997-05-01T23:59:59.000Z

472

Estimation of feedwater heater parameters based on a grey-box approach  

Science Conference Proceedings (OSTI)

The first-principle modeling of a feedwater heater operating in a coal-fired power unit is presented, along with a theoretical discussion concerning its structural simplifications, parameter estimation, and dynamical validation. The model is a part of ... Keywords: First-Principle Model, Grey-Box, Heat Exchanger, Heater, System Identification

Tomasz Barszcz; Piotr Czop

2011-12-01T23:59:59.000Z

473

One-parameter family of indecomposable optimal entanglement witnesses arising from generalized Choi maps  

SciTech Connect

In a recent paper [D. Chruscinski and F. A. Wudarski, Open Sys. Information Dyn. (unpublished)], it was conjectured that the entanglement witnesses arising from some generalized Choi maps are optimal. We show that this conjecture is true. Furthermore, we show that they provide a one-parameter family of indecomposable optimal entanglement witnesses.

Ha, Kil-Chan [Faculty of Mathematics and Statistics, Sejong University, Seoul 143-747 (Korea, Republic of); Kye, Seung-Hyeok [Department of Mathematics, Seoul National University, Seoul 151-742 (Korea, Republic of)

2011-08-15T23:59:59.000Z

474

A study of variable selection using g-prior distribution with ridge parameter  

Science Conference Proceedings (OSTI)

In the Bayesian stochastic search variable selection framework, a common prior distribution for the regression coefficients is the g-prior of Zellner. However there are two standard cases where the associated covariance matrix does not exist and the ... Keywords: Bayesian Lasso, Generalized linear mixed model, Metropolis-within-Gibbs algorithm, Probit mixed regression model, Ridge parameter, Stochastic search variable selection, Zellner prior

M. Baragatti; D. Pommeret

2012-06-01T23:59:59.000Z

475

A revisit to block and recursive least squares for parameter estimation  

Science Conference Proceedings (OSTI)

In this paper, the classical least squares (LS) and recursive least squares (RLS) for parameter estimation have been re-examined in the light of the present day computing capabilities. It has been demonstrated that for linear time-invariant systems, ... Keywords: Blockwise least squares (BLS), Change detection, Recursive least squares (RLS), Sliding window blockwise least squares (SWBLS), Variable-length window

Jin Jiang; Youmin Zhang

2004-07-01T23:59:59.000Z

476

Embedded Estimation of Fault Parameters in an Unmanned Aerial Vehicle Sikandar Samar  

E-Print Network (OSTI)

Embedded Estimation of Fault Parameters in an Unmanned Aerial Vehicle Sikandar Samar Information of the Aerosonde unmanned aerial vehicle (UAV) in the presence of winds and turbulence. An excellent performance studied in the controls community for the past two decades; see survey papers [1], [2], [3

477

Author's personal copy Determination of Resonance Parameters and their Covariances from Neutron Induced  

E-Print Network (OSTI)

component tt. Consequently, response functions will strongly depend on the neutron physics propertiesAuthor's personal copy Determination of Resonance Parameters and their Covariances from Neutron AT A WHITE NEUTRON SOURCE 3056 A. Time-of-Flight Facilities 3056 B. Time-of-Flight Technique 3056 C. Response

Danon, Yaron

478

AIAA-2003-0694 QUANTIFICATION OF PROCESSING PARAMETERS FOR WIND TURBINE  

E-Print Network (OSTI)

AIAA-2003-0694 QUANTIFICATION OF PROCESSING PARAMETERS FOR WIND TURBINE BLADES Douglas Cairns, John of processing techniques and can be useful to wind turbine blade manufacturers to prepare processing conditions-3]. This is a consequence of the typical material architectures that are used in wind turbine blades. Figure 1

479

Development of microbial-enzyme-mediated decomposition model parameters through steady-state and dynamic analyses  

Science Conference Proceedings (OSTI)

We developed a Microbial-ENzyme-mediated Decomposition (MEND) model, based on the Michaelis-Menten kinetics, that describes the dynamics of physically defined pools of soil organic matter (SOC). These include particulate, mineral-associated, dissolved organic matter (POC, MOC, and DOC, respectively), microbial biomass, and associated exoenzymes. The ranges and/or distributions of parameters were determined by both analytical steady-state and dynamic analyses with SOC data from the literature. We used an improved multi-objective parameter sensitivity analysis (MOPSA) to identify the most important parameters for the full model: maintenance of microbial biomass, turnover and synthesis of enzymes, and carbon use efficiency (CUE). The model predicted an increase of 2 C (baseline temperature =12 C) caused the pools of POC-Cellulose, MOC, and total SOC to increase with dynamic CUE and decrease with constant CUE, as indicated by the 50% confidence intervals. Regardless of dynamic or constant CUE, the pool sizes of POC, MOC, and total SOC varied from 8% to 8% under +2 C. The scenario analysis using a single parameter set indicates that higher temperature with dynamic CUE might result in greater net increases in both POC-Cellulose and MOC pools. Different dynamics of various SOC pools reflected the catalytic functions of specific enzymes targeting specific substrates and the interactions between microbes, enzymes, and SOC. With the feasible parameter values estimated in this study, models incorporating fundamental principles of microbial-enzyme dynamics can lead to simulation results qualitatively different from traditional models with fast/slow/passive pools.

Wang, Gangsheng [ORNL; Post, Wilfred M [ORNL; Mayes, Melanie [ORNL

2013-01-01T23:59:59.000Z

480

Ordering of two small parameters in the shallow water wave problem  

E-Print Network (OSTI)

The classical problem of irrotational long waves on the surface of a shallow layer of an ideal fluid moving under the influence of gravity as well as surface tension is considered. A systematic procedure for deriving an equation for surface elevation for a prescribed relation between the orders of the two expansion parameters, the amplitude parameter $\\alpha$ and the long wavelength (or shallowness) parameter $\\beta$, is developed. Unlike the heuristic approaches found in the literature, when modifications are made in the equation for surface elevation itself, the procedure starts from the consistently truncated asymptotic expansions for unidirectional waves, a counterpart of the Boussinesq system of equations for the surface elevation and the bottom velocity, from which the leading order and higher order equations for the surface elevation can be obtained by iterations. The relations between the orders of the two small parameters are taken in the form $\\beta=O(\\alpha^n)$ and $\\alpha=O(\\beta^m)$ with $n$ and $m$ specified to some important particular cases. The analysis shows, in particular, that some evolution equations, proposed before as model equations in other physical contexts (like the Gardner equation, the modified KdV equation, and the so-called 5th-order KdV equation), can emerge as the leading order equations in the asymptotic expansion for the unidirectional water waves, on equal footing with the KdV equation. The results related to the higher orders of approximation provide a set of consistent higher order model equations for unidirectional water waves which replace the KdV equation with higher-order corrections in the case of non-standard ordering when the parameters $\\alpha$ and $\\beta$ are not of the same order of magnitude. (See the paper for the complete abstract.)

Georgy I. Burde; Artur Sergyeyev

2013-01-28T23:59:59.000Z

Note: This page contains sample records for the topic "tox parameter tox" 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.