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Note: This page contains sample records for the topic "bispectral threshold method" from the National Library of EnergyBeta (NLEBeta).
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1

Bispectral-based methods for clustering time series  

Science Conference Proceedings (OSTI)

Distinguishing among linear and nonlinear time series or between nonlinear time series generated by different underlying processes is challenging, as second-order properties are generally insufficient for the task. Different nonlinear processes have ... Keywords: Bispectral density function, Hierarchical clustering, Nonlinear time series

Jane L. Harvill, Nalini Ravishanker, Bonnie K. Ray

2013-08-01T23:59:59.000Z

2

Matrix Recipes for Hard Thresholding Methods  

E-Print Network (OSTI)

1 Matrix Recipes for Hard Thresholding Methods Anastasios Kyrillidis and Volkan Cevher Abstract a new set of sparse and low-rank recovery algorithms within the class of hard thresholding methods. We complexity. Index Terms Affine rank minimization, compressed sensing, sparse approximation algorithms, hard

Diggavi, Suhas

3

Optimal Thresholds for the Estimation of Area Rain-Rate Moments by the Threshold Method  

Science Conference Proceedings (OSTI)

Optimization of the threshold method, achieved by determination of the threshold that maximizes the correlation between an area-average rain-rate moment and the area coverage of rain rates exceeding the threshold, is demonstrated empirically and ...

David A. Short; Kunio Shimizu; Benjamin Kedem

1993-02-01T23:59:59.000Z

4

Properties of the Threshold Method on a Radar Rain Cluster Basis  

Science Conference Proceedings (OSTI)

The average rain rate R is estimated with radar data at the radar beam height by measuring the fractional area F(?) of pixels above a preset rain-rate threshold ?. This work applies the “threshold method” to smaller areas. The threshold method ...

L. Li; S. Sénési

1997-11-01T23:59:59.000Z

5

Organic thin film devices with stabilized threshold voltage and mobility, and method for preparing the devices  

SciTech Connect

Organic thin film devices that included an organic thin film subjected to a selected dose of a selected energy of ions exhibited a stabilized mobility (.mu.) and threshold voltage (VT), a decrease in contact resistance R.sub.C, and an extended operational lifetime that did not degrade after 2000 hours of operation in the air.

Nastasi, Michael Anthony; Wang, Yongqiang; Fraboni, Beatrice; Cosseddu, Piero; Bonfiglio, Annalisa

2013-06-11T23:59:59.000Z

6

Eyelid and eyelash detection method in the normalized iris image using the parabolic Hough model and Otsu's thresholding method  

Science Conference Proceedings (OSTI)

Eyelids and eyelashes occluding the iris region are noise factors that degrade the performance of iris recognition. If they are incorrectly classified as an iris region, the false iris region information decreases the recognition rate. Thus, reliable ... Keywords: Eyelash detection, Eyelid detection, Iris recognition, Parabolic Hough model, Thresholding

Tae-Hong Min; Rae-Hong Park

2009-09-01T23:59:59.000Z

7

Optimal multilevel thresholding using bacterial foraging algorithm  

Science Conference Proceedings (OSTI)

The conventional multilevel thresholding methods are efficient for bi-level thresholding. However, they are computationally expensive extending to multilevel thresholding since they exhaustively search the optimal thresholds to optimize the objective ... Keywords: Bacterial foraging, Histogram, Image segmentation, Kapur's function, Multilevel thresholding, Otsu's function

P. D. Sathya; R. Kayalvizhi

2011-11-01T23:59:59.000Z

8

Modified bacterial foraging algorithm based multilevel thresholding for image segmentation  

Science Conference Proceedings (OSTI)

Multilevel thresholding is one of the most popular image segmentation techniques. In order to determine the thresholds, most methods use the histogram of the image. This paper proposes multilevel thresholding for histogram-based image segmentation using ... Keywords: Bacterial foraging, Histogram, Image segmentation, Kapur's function, Multilevel thresholding, Otsu's function

P. D. Sathya; R. Kayalvizhi

2011-06-01T23:59:59.000Z

9

RAINSAT. A One Year Evaluation of a Bispectral Method for the Analysis and Short-Range Forecasting of Precipitation Areas  

Science Conference Proceedings (OSTI)

RAINSAT uses under data to calibrate GOES visible and infra data in terms of probability of rain. It produces probability of rain maps and 3 h forecast probability of rain maps by extrapolation.

Patrick King; Tsoi-Ching Yip; J. David Steenbergen

1989-06-01T23:59:59.000Z

10

Peaks Over Threshold Plot  

Science Conference Proceedings (OSTI)

... CAPTURE POT.OUT PEAKS OVER THRESHOLD PLOT Y17 R END OF CAPTURE . SKIP 0 READ DPST2F.DAT ITER NPOINTS THRESH R2 XR . ...

2010-12-06T23:59:59.000Z

11

Hydrogen Threshold Cost Calculation  

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

Program Record (Offices of Fuel Cell Technologies) Program Record (Offices of Fuel Cell Technologies) Record #: 11007 Date: March 25, 2011 Title: Hydrogen Threshold Cost Calculation Originator: Mark Ruth & Fred Joseck Approved by: Sunita Satyapal Date: March 24, 2011 Description: The hydrogen threshold cost is defined as the hydrogen cost in the range of $2.00-$4.00/gge (2007$) which represents the cost at which hydrogen fuel cell electric vehicles (FCEVs) are projected to become competitive on a cost per mile basis with the competing vehicles [gasoline in hybrid-electric vehicles (HEVs)] in 2020. This record documents the methodology and assumptions used to calculate that threshold cost. Principles: The cost threshold analysis is a "top-down" analysis of the cost at which hydrogen would be

12

Going after the k-SAT threshold  

Science Conference Proceedings (OSTI)

Random k-SAT is the single most intensely studied example of a random constraint satisfaction problem. But despite substantial progress over the past decade, the threshold for the existence of satisfying assignments is not known precisely for ... Keywords: belief propagation, k-SAT, phase transitions, random structures, second moment method

Amin Coja-Oghlan; Konstantinos Panagiotou

2013-06-01T23:59:59.000Z

13

Threshold results for semilinear parabolic systems  

E-Print Network (OSTI)

A threshold result was proved in this paper for semilinear parabolic system with pure power type nonlinearities

Xie, Qiuyi Dai Haiyang He Junhui

2010-01-01T23:59:59.000Z

14

Compositional threshold for Nuclear Waste Glass Durability  

Science Conference Proceedings (OSTI)

Within the composition space of glasses, a distinct threshold appears to exist that separates "good" glasses, i.e., those which are sufficiently durable, from "bad" glasses of a low durability. The objective of our research is to clarify the origin of this threshold by exploring the relationship between glass composition, glass structure and chemical durability around the threshold region.

Kruger, Albert A. [Pacific Northwest National Lab., Richland, WA (United States); Farooqi, Rahmatullah [Pohang Univ. of Science and Technology, (Korea, Republic of); Hrma, Pavel R. [Pacific Northwest National Lab., Richland, WA (United States), Pohang Univ. of Science and Technology, (Korea, Republic of)

2013-04-24T23:59:59.000Z

15

IRRADIANCE THRESHOLDS FOR CHORIORETINAL LESIONS  

SciTech Connect

With use of a high-intensity light source to produce chorioretinal lesions in the eyes of rabbits, cats, and guinea pigs, we determined, at different levels of retinal irradiance, the exposure time which produced an ophthalmoscopically visible lesion it was found that at irradiance levels greater than 2 cal. per square centimeter per second a radiant exposure of 1.0 cal. per square centimeter produced a threshold lesion. At irradiance levels 1ess than 0.7 cal. per square centimeter per second lesions could not be produced at any exposure time through 10 seconds. Histological data on the nature of the lesions and course of healing are presented and discussed. (auth)

DeMott, D.W.; Davis, T.P.

1959-10-01T23:59:59.000Z

16

Must Kohn-Sham oscillator strengths be accurate at threshold?  

Science Conference Proceedings (OSTI)

The exact ground-state Kohn-Sham (KS) potential for the helium atom is known from accurate wave function calculations of the ground-state density. The threshold for photoabsorption from this potential matches the physical system exactly. By carefully studying its absorption spectrum, we show the answer to the title question is no. To address this problem in detail, we generate a highly accurate simple fit of a two-electron spectrum near the threshold, and apply the method to both the experimental spectrum and that of the exact ground-state Kohn-Sham potential.

Yang Zenghui; Burke, Kieron [Department of Chemistry, University of California, Irvine, California 92697 (United States); Faassen, Meta van [Department of Theoretical Chemistry, Faculty of Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1083, NL-1081 HV Amsterdam (Netherlands)

2009-09-21T23:59:59.000Z

17

Analytical Thresholds: Determination of Minimum ...  

Science Conference Proceedings (OSTI)

... Different color channels behave differently – if possible, determine ATs for each color • ATs derived from methods based ...

2010-11-12T23:59:59.000Z

18

Threshold 21 Model | Open Energy Information  

Open Energy Info (EERE)

Threshold 21 Model Threshold 21 Model Jump to: navigation, search LEDSGP green logo.png FIND MORE DIA TOOLS This tool is part of the Development Impacts Assessment (DIA) Toolkit from the LEDS Global Partnership. Tool Summary LAUNCH TOOL Name: Threshold 21 Model Agency/Company /Organization: Millennium Institute Sector: Climate Topics: Co-benefits assessment, - Macroeconomic, Pathways analysis Resource Type: Software/modeling tools Complexity/Ease of Use: Moderate Website: www.millenniuminstitute.net/integrated_planning/tools/T21/index.html#r Cost: Free Threshold 21 Model Screenshot References: Threshold 21 Model[1] Related Tools MIT Emissions Prediction and Policy Analysis (EPPA) Model Global Atmospheric Pollution Forum Air Pollutant Emission Inventory Electricity Markets Analysis (EMA) Model

19

Threshold Photo-production of J/psi Mesons  

DOE Green Energy (OSTI)

With the advent of higher energies at Jefferson Lab, the study of charmonium becomes possible. The threshold production of J/{Psi} meson photo-production on hydrogen is {approx} 8.2 GeV, thus with a 8+ GeV beam, the elementary {gamma}-J/{Psi} cross section can be measured. Threshold charm production on a nucleus can give information on the J/{Psi}-N interaction. The standard method to extract this cross section has been to measure the nuclear dependence of J/{Psi} production. The majority of these A-dependent J/{Psi} production experiments have been measured at high energy, while the only near-threshold experiment was performed using 20 GeV photons. This 20 GeV SLAC experiment measured {sigma}{sub J/{Psi}N} = 3.6 {+-} 0.8 {+-} 0.5 mb[1]; whereas theory predicts this cross section to be higher, about 7 mb [2]. It is unclear whether the SLAC determination of {sigma}{sub J/{Psi}N} corresponds to the physical {sigma}{sub J/{Psi}N}, due to the fact that at these energies the J/{Psi} may still be formed outside the nucleus [3] [4]. A measurement of the nuclear dependence of threshold J/{Psi} photo-production may resolve this issue.

Jim Dunne

1998-06-01T23:59:59.000Z

20

Definition: Curtailment Threshold | Open Energy Information  

Open Energy Info (EERE)

Curtailment Threshold Curtailment Threshold Jump to: navigation, search Dictionary.png Curtailment Threshold The minimum Transfer Distribution Factor which, if exceeded, will subject an Interchange Transaction to curtailment to relieve a transmission facility constraint.[1] Related Terms transmission lines, Distribution Factor, transmission line References ↑ Glossary of Terms Used in Reliability Standards An in LikeLike UnlikeLike You like this.Sign Up to see what your friends like. line Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Curtailment_Threshold&oldid=480338" Categories: Definitions ISGAN Definitions What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load)

Note: This page contains sample records for the topic "bispectral threshold method" 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

Improved Sparsity Thresholds Through Dictionary Splitting  

E-Print Network (OSTI)

Known sparsity thresholds for basis pursuit to deliver the maximally sparse solution of the compressed sensing recovery problem typically depend on the dictionary's coherence. While the coherence is easy to compute, it can lead to rather pessimistic thresholds as it captures only limited information about the dictionary. In this paper, we show that viewing the dictionary as the concatenation of two general sub-dictionaries leads to provably better sparsity thresholds--that are explicit in the coherence parameters of the dictionary and of the individual sub-dictionaries. Equivalently, our results can be interpreted as sparsity thresholds for dictionaries that are unions of two general (i.e., not necessarily orthonormal) sub-dictionaries.

Kuppinger, Patrick; Bölcskei, Helmut

2009-01-01T23:59:59.000Z

22

Development of a Probabilistic Convective Weather Forecast Threshold Parameter for Flight-Routing Decisions  

Science Conference Proceedings (OSTI)

This paper presents a method for determining a threshold value of probabilistic convective weather forecast data. By synchronizing air traffic data and an experimental probabilistic convective weather forecast product, it was observed that ...

Kapil Sheth; Thomas Amis; Sebastian Gutierrez-Nolasco; Banavar Sridhar; Daniel Mulfinger

2013-10-01T23:59:59.000Z

23

Development of Probabilistic Convective Weather Forecast Threshold Parameter for Flight-Routing Decisions  

Science Conference Proceedings (OSTI)

This paper presents a method for determining a threshold value of probabilistic convective weather forecast data. By synchronizing air traffic data and an experimental probabilistic convective weather forecast product, it was observed that ...

Kapil Sheth; Thomas Amis; Sebastian Gutierrez-Nolasco; Banavar Sridhar; Daniel Mulfinger

24

GC GUIDANCE ON MINOR CONSTRUCTION THRESHOLDS  

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

GUIDANCE GUIDANCE ON MINOR CONSTRUCTION THRESHOLDS We have been asked about how the Department implements what is known as the "minor construction threshold," which limits the amount of certain funds that can be spent on minor construction projects that are not specifically authorized by law. This Guidance is intended to clarify both the applicable law and Department policy. The Secretary's authority to carry out construction projects is subject to several limitations in the Atomic Energy Defense Act (AEDA) on the use of funds appropriated for DOE national security programs. One of these limitations, the "minor construction threshold," caps the amount of "operation and maintenance funds" or "facilities and "infrastructure funds authorized by a DOE

25

Threshold Effects of Energy Price Changes ?  

E-Print Network (OSTI)

The effectiveness of policies to reduce the use of energy depend on the elasticity of substitution between the various inputs and on the rate of technological progress. This paper presents a theoretical model emphasising energy investments’ characteristics of uncertainty and irreversibility that result in hypotheses concerning the relative values of substitution parameters and rates of technological change in periods of high and increasing energy prices and in periods of low prices. The theoretical model suggests that threshold level effects exist. Firms are induced to substitute away from energy only if prices of energy exceed a certain threshold level and they reverse the technology only if prices are low enough. Using panel data for the Dutch economy we do not find threshold effects in the level of energy prices.

Daan P. Van Soest A; Gerard H. Kuper B; Jan Jacobs C

2000-01-01T23:59:59.000Z

26

L-H Threshold Studies in NSTX  

Science Conference Proceedings (OSTI)

Recent experiments in the low aspect ratio National Spherical Torus Experiment (NSTX) have been run in support of the high priority ITER and ITPA issue of access to the H-mode. Specifically, a series of experiments showed reduced power threshold values for deuterium vs helium plasmas, and for plasmas with lower current, lower triangularity and with lithium conditioning. Application of n=3 fields at the plasma edge resulted in higher power thresholds. To within the constraints of temporal and spatial resolutions, no systematic difference in T{sub e}, n{sub e}, p{sub e}, T{sub i}, v or their derivatives was found in discharges that transitioned into the H-mode versus those at slightly lower power that did not. Finally, H{sub 98y,2} {approx} 1 confinement quality could be achieved for powers just above the threshold power in ELM-free conditions.

Kaye, S M; Battaglia, D; Bell, R E; Chang, C S; Hosea, J; Kugel, H; LeBlanc, B P; Meyer, H; Park, G Y

2011-09-06T23:59:59.000Z

27

Reliability of underwater hearing thresholds in pinnipeds  

E-Print Network (OSTI)

Reliability of underwater hearing thresholds in pinnipeds Brandon L. Southall Long Marine@ucsc.edu Abstract: Repeated measures of low-frequency underwater hearing sensi- tivity in individuals of three and certain testing parameters (e.g., equipment and research personnel), measured underwater hearing

Reichmuth, Colleen

28

Finding critical thresholds for defining bursts  

Science Conference Proceedings (OSTI)

A burst, i.e., an unusally high frequency of an event in a time-window, is interesting in monitoring systems as it often indicates abnormality. While the detection of bursts is well addressed, the question of what "critical" thresholds, on the number ... Keywords: analytics for temporal data, massive data analytics

Bibudh Lahiri; Ioannis Akrotirianakis; Fabian Moerchen

2011-08-01T23:59:59.000Z

29

A magnetoelectronic macrocell employing reconfigurable threshold logic  

Science Conference Proceedings (OSTI)

In this paper, we introduce a reconfigurable fabric based around a new class of circuit element: the hybrid Hall effect (HHE) magnetoelectronic device. Because they incorporate a ferromagnetic element, HHE devices are inherently non-volatile, retaining ... Keywords: PLA/CPLD, lookup table, magnetoelectronic circuits, non-volatility, threshold logic, wired-and logic

Steve P. Ferrera; Nicholas P. Carter

2004-02-01T23:59:59.000Z

30

Dynamic Multi--Threshold Metering Schemes  

E-Print Network (OSTI)

Dynamic Multi--Threshold Metering Schemes Carlo Blundo, Annalisa De Bonis, Barbara Masucci of Waterloo Waterloo, Ontario, N2L 3G1, Canada E­mail: dstinson@cacr.math.uwaterloo.ca Abstract A metering and servers on the web during a certain number of time frames. Naor and Pinkas [7] considered metering schemes

Stinson, Douglas

31

Perception Thresholds of Flicker in Modern Lighting  

Science Conference Proceedings (OSTI)

This power quality (PQ) case study reports the results of tests performed at the University of New Brunswick Department of Psychology to determine whether perception thresholds of humans to flicker in modern magnetic, electronic, and halogen lighting is significantly different from their reaction to flicker in a standard 60-watt incandescent lamp.

2003-12-31T23:59:59.000Z

32

Pressure Systems Stored-Energy Threshold Risk Analysis  

DOE Green Energy (OSTI)

Federal Regulation 10 CFR 851, which became effective February 2007, brought to light potential weaknesses regarding the Pressure Safety Program at the Pacific Northwest National Laboratory (PNNL). The definition of a pressure system in 10 CFR 851 does not contain a limit based upon pressure or any other criteria. Therefore, the need for a method to determine an appropriate risk-based hazard level for pressure safety was identified. The Laboratory has historically used a stored energy of 1000 lbf-ft to define a pressure hazard; however, an analytical basis for this value had not been documented. This document establishes the technical basis by evaluating the use of stored energy as an appropriate criterion to establish a pressure hazard, exploring a suitable risk threshold for pressure hazards, and reviewing the methods used to determine stored energy. The literature review and technical analysis concludes the use of stored energy as a method for determining a potential risk, the 1000 lbf-ft threshold, and the methods used by PNNL to calculate stored energy are all appropriate. Recommendations for further program improvements are also discussed

Paulsen, Samuel S.

2009-08-25T23:59:59.000Z

33

Reduce Threshold for Toplit Daylighting Area  

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

Supporting analysis for proposed Supporting analysis for proposed changes to the commercial provisions of the 2012 IECC: Reduce Threshold for Toplit Daylighting Area R Hart R Athalye Pacific Northwest National Laboratory December 2012 2 Proposal Description This proposal modifies Section C402.3.2 of the 2012 IECC for the 2015 version. It reduces the area threshold for skylight daylit zones from 10,000 square feet to 2,000 square feet. It maintains 15 foot ceiling height requirement and the exception for climate zones 6 through 8. Energy Impact Based on average national energy prices 1 of $0.99 per therm and $0.1032 per kWh, the net savings are calculated with EnergyPlus(tm) 2 from whole building energy savings that result from reduced lighting, and depending on climate zone, increased or decreased heating and cooling.

34

Low Swing Dual Threshold Voltage Domino Logic  

E-Print Network (OSTI)

A low swing domino logic technique is proposed to decrease power consumption without sacrificing noise immunity. With the proposed low swing domino logic circuit technique, active power consumption is reduced by up to 9.4% while improving the noise immunity by 2.6% as compared to standard domino logic circuits. It is also shown that by applying a low swing contention reduction technique, the power savings can be further increased by 6.7% while the delay can be improved by 8.6%. A simple and efficient dual threshold voltage (dual-V t ) circuit technique that incorporates low swing signals is also proposed. It is shown that the proposed dual-V technique reduces the standby leakage current by approximately 235 times while offering enhanced delay characteristics as compared to a standard low threshold voltage implementation.

Volkan Kursun; Eby G. Friedman

2002-01-01T23:59:59.000Z

35

Probe threshold and probe trivially perfect graphs  

Science Conference Proceedings (OSTI)

An undirected graph G=(V,E) is a probeC graph if its vertex set can be partitioned into two sets, N (nonprobes) and P (probes) where N is independent and there exists E^'@?NxN such that G^'=(V,E@?E^') is a C graph. In this article we investigate probe ... Keywords: 2-SAT, Graph class, Probe graphs, Probe interval, Probe threshold, Probe trivially perfect

Daniel Bayer; Van Bang Le; H. N. de Ridder

2009-11-01T23:59:59.000Z

36

Tongue Liminary Threshold Identification to Electrotactile Stimulation  

E-Print Network (OSTI)

Many applications use electrostimulation of the human skin to provide tactile sensation. The effect of electrotactile stimulations were studied on a 6x6 matrix of tactile electrodes placed on the anterior part of the tongue. The liminary threshold with continuous or discontinuous waveform and patterns with 2 or 4 electrodes was investigated. The result suggest that for energy saving and to improve the yield, it would probably be better to use discontinuous stimulation with two electrode patterns.

Robineau, Fabien; Orliaguet, Jean-Pierre; Payan, Yohan

2007-01-01T23:59:59.000Z

37

Category 3 threshold quantities for hazard categorization of nonreactor facilities  

Science Conference Proceedings (OSTI)

This document provides the information necessary to determine Hazard Category 3 threshold quantities for those isotopes of interest not listed in WHC-CM-4-46, Section 4, Table 1.''Threshold Quantities.''

Mandigo, R.L.

1996-02-13T23:59:59.000Z

38

Partially blind threshold signatures based on discrete logarithm  

Science Conference Proceedings (OSTI)

In this paper, we propose a group-oriented partially blind (t, n) threshold signature scheme based on the discrete logarithm problem. By the scheme, any t out of n signers in a group can represent the group to sign partially blind threshold signatures, ... Keywords: Discrete logarithm, E-cash systems, Partially blind signatures, Privacy and security, Secure, Secure voting schemes, Threshold signatures

W. -S. Juang; C. -L. Lei

1999-01-01T23:59:59.000Z

39

The AMS-01 Aerogel Threshold ?Cerenkov counter.  

E-Print Network (OSTI)

The Alpha Magnetic Spectrometer in a precursor version (AMS-01), was flown in June 1998 on a 51.6 ? orbit and at altitudes ranging between 320 and 390 km, on board of the space shuttle Discovery (flight STS-91). AMS-01 included an Aerogel Threshold ? Cerenkov counter (ATC) to separate ¯p from e ? and e + from p, for momenta below 3.5 GeV/c. This paper presents a description of the ATC counter and reports on its performances during the flight STS-91.

D. Barancourt A; F. Barao B; G. Barbier A; G. Barreira C; M. Buénerd A; G. Castellini D; E. Choumilov E; J. Favier B; N. Fouque B; A. Gougas F; V. Hermel B; R. Kossakowski B; G. Laborie A; G. Laurenti G; S. -c. Lee F; F. Mayet A; B. Meillon A; Y. -t. Oyang F; V. Plyaskin E; V. Pojidaev E; C. Rossin A; D. Santos A; F. Vezzu A; J. P. Vialle B

2000-01-01T23:59:59.000Z

40

Quark mass thresholds in QCD thermodynamics  

E-Print Network (OSTI)

We discuss radiative corrections to how quark mass thresholds are crossed, as a function of the temperature, in basic thermodynamic observables such as the pressure, the energy and entropy densities, and the heat capacity of high temperature QCD. The indication from leading order that the charm quark plays a visible role at surprisingly low temperatures, is confirmed. We also sketch a way to obtain phenomenological estimates relevant for generic expansion rate computations at temperatures between the QCD and electroweak scales, pointing out where improvements over the current knowledge are particularly welcome.

M. Laine; Y. Schroder

2006-03-06T23:59:59.000Z

Note: This page contains sample records for the topic "bispectral threshold method" 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

Threshold electrodisintegration in the {ital A}=3 system  

SciTech Connect

Inclusive inelastic electron scattering cross sections for {sup 3}H and {sup 3}He were measured for excitation energies below 18 MeV. Longitudinal and transverse response functions were determined from these cross sections for six values of the three-momentum transfer {ital q} in the range 0.88 {lt}{ital q}{lt}2.87 fm{sup {minus}1}. A previously observed {ital C}0 multipole enhancement near threshold in the two-body channel for {sup 3}He is confirmed but is not observed for {sup 3}H. The experimental data are found to be in good agreement with two recent calculations of the longitudinal and transverse response functions. The first uses variational ground-state wave functions and the orthogonal correlated states method to describe the two- and three-body breakup channels. The second uses bound and continuum Faddeev wave functions obtained for a simple central potential. Agreement with the data is good for the first model and better for the second. The inclusion of final-state interactions (FSI) in the Faddeev continuum is found to be very important in these threshold breakup kinematics; in many cases inclusion of FSI changes the response functions by factors of two or three giving excellent agreement with the data. The transverse response functions are well reproduced, even though neither model includes meson exchange currents. Ratios of the response functions for the two nuclei are also well described.

Retzlaff, G.A.; Caplan, H.S.; Hallin, E.L.; Skopik, D.M. [Saskatchewan Accelerator Laboratory, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 0W0 (Canada)] [Saskatchewan Accelerator Laboratory, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 0W0 (Canada); Beck, D.; Blomqvist, K.I.; Dobson, G.; Dow, K.; Farkhondeh, M.; Flanz, J.; Kowalski, S.; Sapp, W.W.; Sargent, C.P.; Tieger, D.; Turchinetz, W.; Williamson, C.F. [Bates Linear Accelerator Center and Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)] [Bates Linear Accelerator Center and Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Dodge, W.; Maruyama, X.K.; Lightbody, J.W. Jr. [National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)] [National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States); Goloskie, R. [Department of Physics, Worcester Polytechnic Institute, Worcester, Massachusetts 01601 (United States)] [Department of Physics, Worcester Polytechnic Institute, Worcester, Massachusetts 01601 (United States); McCarthy, J.; Ueng, T.S.; Whitney, R.R. [Department of Physics, University of Virginia, Charlottesville, Virginia 22901 (United States)] [Department of Physics, University of Virginia, Charlottesville, Virginia 22901 (United States); Quinn, B. [Department of Physics, Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213 (United States)] [Department of Physics, Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213 (United States); Dytman, S.; Von Reden, K. [Department of Physics, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (United States)] [Department of Physics, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (United States); Schiavilla, R. [Instituto Nazionale di Fisica Nucleare, Lecce (Italy)] [Instituto Nazionale di Fisica Nucleare, Lecce (Italy); Tjon, J.A. [Institute for Nuclear Physics, University of Utrecht, 3508 TA Utrecht (Netherlands)] [Institute for Nuclear Physics, University of Utrecht, 3508 TA Utrecht (Netherlands)

1994-03-01T23:59:59.000Z

42

Three-photon above-threshold ionization of magnesium  

Science Conference Proceedings (OSTI)

Three-photon ionization cross sections from the ground state, and two-photon ionization from the 3 {sup 1}P(3s3p) state have been calculated for Mg in the region between the 3p and 4s ionization thresholds. These processes include an above-threshold ionization process for the last absorbed photon. We have used the Green's-function method in the Feshbach formalism and an L{sup 2} close coupling approach, with a basis of L{sup 2} integrable B-spline functions. We report the positions, widths, and assignments of a number of relevant {sup 1}P{sup o} and{sup 1}F{sup o} doubly excited Feshbach states. We also observe unusually high cross sections due to a bound-bound transition from the 3 {sup 1}S(3s{sup 2}) to the 3 {sup 1}P(3s3p) state, a core excitation process, and the population of an intermediate doubly excited state. Both total cross sections and angular distributions are reported.

Reber, A.; Berry, R.S. [Department of Chemistry and James Franck Institute, University of Chicago, Chicago, Illinois 60637 (United States); Martin, F. [Departamento de Quimica C-9, Universidad Autonoma de Madrid, 28049 Madrid (Spain); Bachau, H. [Centre des Lasers Intenses et Applications (UMR 5107 du CNRS), Universite de Bordeaux I, 351 Cours de la Liberation, F-33405 Talence (France)

2003-12-01T23:59:59.000Z

43

Byzantine agreement method without authentication  

SciTech Connect

This invention relates to a method for achieving Byzantine agreement without authentication among n 100 communicating processors using event counting and thresholding rather than message exchanges and evaluations.

Reischuk, R.K.

1983-12-01T23:59:59.000Z

44

Kaon photoproduction and electroproduction near threshold  

Science Conference Proceedings (OSTI)

We analyze the electromagnetic production of K{sup +}{Lambda} and K{sup 0}{Lambda} near their production thresholds by using isobar models. In the K{sup +}{Lambda} channel we show that the model can nicely describe the available experimental data. In the K{sup 0}{Lambda} channel we demonstrate that the K{sup 0} charge form factor has sizable effects on the longitudinal cross section. By extending the model up to W = 1730 MeV, we are able to observe the existence of the narrow P{sub 11}(J{sup p} = 1/2{sup +}) resonance in the kaon photoproduction process. It is found that the most convincing mass (width) of this resonance is 1650 MeV(5 MeV).

Mart, T. [Departemen Fisika, FMIPA, Universitas Indonesia, Depok 16424 (Indonesia)

2011-10-21T23:59:59.000Z

45

Heart Rate Variability Analysis Using Threshold of Wavelet Package Coefficients  

E-Print Network (OSTI)

In this paper, a new efficient feature extraction method based on the adaptive threshold of wavelet package coefficients is presented. This paper especially deals with the assessment of autonomic nervous system using the background variation of the signal Heart Rate Variability HRV extracted from the wavelet package coefficients. The application of a wavelet package transform allows us to obtain a time-frequency representation of the signal, which provides better insight in the frequency distribution of the signal with time. A 6 level decomposition of HRV was achieved with db4 as mother wavelet, and the above two bands LF and HF were combined in 12 specialized frequencies sub-bands obtained in wavelet package transform. Features extracted from these coefficients can efficiently represent the characteristics of the original signal. ANOVA statistical test is used for the evaluation of proposed algorithm.

Kheder, G; Massoued, M Ben; Samet, M

2009-01-01T23:59:59.000Z

46

Selection of Thresholding Scheme for Image Noise Reduction on Wavelet Components Using Bayesian Estimation  

Science Conference Proceedings (OSTI)

Methods for image noise reduction based on wavelet analysis perform by first decomposing the image and then by applying non-linear compression functions on the wavelet components. The approach commonly used to reduce the noise is to threshold the absolute ... Keywords: Bayesian estimation, Image noise reduction, wavelet analysis

A. De Stefano; P. R. White; W. B. Collis

2004-11-01T23:59:59.000Z

47

Directional histogram ratio at random probes: A local thresholding criterion for capillary images  

Science Conference Proceedings (OSTI)

With the development of micron-scale imaging techniques, capillaries can be conveniently visualized using methods such as two-photon and whole mount microscopy. However, the presence of background staining, leaky vessels and the diffusion of small fluorescent ... Keywords: Capillary, Directional histogram ratio, Image thresholding, Random probe, Two-photon imaging, Whole mount microscopy

Na Lu; Jharon Silva; Yu Gu; Scott Gerber; Hulin Wu; Harris Gelbard; Stephen Dewhurst; Hongyu Miao

2013-07-01T23:59:59.000Z

48

Where to stop reading a ranked list?: threshold optimization using truncated score distributions  

Science Conference Proceedings (OSTI)

Ranked retrieval has a particular disadvantage in comparison with traditional Boolean retrieval: there is no clear cut-off point where to stop consulting results. This is a serious problem in some setups. We investigate and further develop methods to ... Keywords: distributed retrieval, effectiveness measure optimization, expectation maximization, filtering, fusion, meta-search, probability of relevance, score distribution, score normalization, threshold optimization, truncated distribution

Avi Arampatzis; Jaap Kamps; Stephen Robertson

2009-07-01T23:59:59.000Z

49

Measurement and interpretation of threshold stress intensity factors for steels in high-pressure hydrogen gas.  

DOE Green Energy (OSTI)

Threshold stress intensity factors were measured in high-pressure hydrogen gas for a variety of low alloy ferritic steels using both constant crack opening displacement and rising crack opening displacement procedures. The sustained load cracking procedures are generally consistent with those in ASME Article KD-10 of Section VIII Division 3 of the Boiler and Pressure Vessel Code, which was recently published to guide design of high-pressure hydrogen vessels. Three definitions of threshold were established for the two test methods: K{sub THi}* is the maximum applied stress intensity factor for which no crack extension was observed under constant displacement; K{sub THa} is the stress intensity factor at the arrest position for a crack that extended under constant displacement; and K{sub JH} is the stress intensity factor at the onset of crack extension under rising displacement. The apparent crack initiation threshold under constant displacement, K{sub THi}*, and the crack arrest threshold, K{sub THa}, were both found to be non-conservative due to the hydrogen exposure and crack-tip deformation histories associated with typical procedures for sustained-load cracking tests under constant displacement. In contrast, K{sub JH}, which is measured under concurrent rising displacement and hydrogen gas exposure, provides a more conservative hydrogen-assisted fracture threshold that is relevant to structural components in which sub-critical crack extension is driven by internal hydrogen gas pressure.

Nibur, Kevin A.

2010-11-01T23:59:59.000Z

50

Transmission thresholds in time-periodically driven nonlinear disordered systems  

E-Print Network (OSTI)

We study energy propagation in locally time-periodically driven disordered nonlinear chains. For frequencies inside the band of linear Anderson modes, three different regimes are observed with increasing driver amplitude: 1) Below threshold, localized quasiperiodic oscillations and no spreading; 2) Three different regimes in time close to threshold, with almost regular oscillations initially, weak chaos and slow spreading for intermediate times, and finally strong diffusion; 3) Immediate spreading for strong driving. The thresholds are due to simple bifurcations, obtained analytically for a single oscillator, and numerically as turning-points of the nonlinear response manifold for a full chain. Generically, the threshold is nonzero also for infinite chains.

Magnus Johansson; Georgios Kopidakis; Stefano Lepri; Serge Aubry

2008-12-18T23:59:59.000Z

51

Method  

E-Print Network (OSTI)

Abstract: The biodegradabilities of poly(butylene succinate) (PBS) powders in a controlled compost at 58 °C have been studied using a Microbial Oxidative Degradation Analyzer (MODA) based on the ISO 14855-2 method, entitled “Determination of the ultimate aerobic biodegradability of plastic materials under controlled composting conditions—Method by analysis of evolved carbon dioxide—Part 2: Gravimetric measurement of carbon dioxide evolved in a laboratory-scale test”. The evolved CO2 was trapped by an additional aqueous Ba(OH)2 solution. The trapped BaCO3 was transformed into graphite via a serial vaporization and reduction reaction using a gas-tight tube and vacuum manifold system. This graphite was analyzed by accelerated mass spectrometry (AMS) to determine the percent modern carbon [pMC (sample)] based on the 14 C radiocarbon concentration. By using the theory that pMC (sample) was the sum of the pMC (compost) (109.87%) and pMC (PBS) (0%) as the respective ratio in the determined period, the CO2 (respiration) was calculated from only one reaction vessel. It was found that the biodegradabilities determined by the CO2 amount from PBS in the sample vessel were about 30 % lower than those based on the ISO method. These differences between the

Masao Kunioka; Fumi Ninomiya; Masahiro Funabashi

2009-01-01T23:59:59.000Z

52

Probabilistic Shock Iinitiation Thresholds and QMU Applications  

Science Conference Proceedings (OSTI)

The Probabilistic Threshold Criterion (PTC) Project at LLNL develops phenomenological criteria for establishing margin of safety or performance margin on high explosive (HE) initiation in the high-speed impact regime, creating tools for safety assessment and design of initiation systems and HE trains in general. Until recently, there has been little foundation for probabilistic assessment of HE initiation scenarios. This work attempts to use probabilistic information that is available from both historic and ongoing tests to develop a basis for such assessment. Current PTC approaches start with the functional form of James Initiation Criterion as a backbone, and generalize to include varying areas of initiation and provide a probabilistic response based on test data. Recent work includes application of the PTC methodology to safety assessments involving a donor charge detonation and the need for assessment of a nearby acceptor charge's response, as well as flyer-acceptor configurations, with and without barriers. Results to date are in agreement with other less formal assessment protocols, and indicate a promising use for PTC-based assessments. In particular, there is interest in this approach because it supports the Quantified Margins and Uncertainties (QMU) framework for establishing confidence in the performance and/or safety of an HE system.

Hrousis, C A; Gresshoff, M; Overturf, G E

2009-04-10T23:59:59.000Z

53

A threshold Cherenkov detector for K separation using silica aerogel  

E-Print Network (OSTI)

A threshold Cherenkov detector for Kþ =pþ separation using silica aerogel R. Siudak a,b , A August 2008 Keywords: Threshold Cherenkov detector Silica aerogel Reaction pp ! Kþ ðLp� Kþ =pþ separation in the focal plane of a magnetic spectrograph. Silica aerogel with refractive index of n ¼ 1:05 is applied

Magiera, Andrzej

54

METHOD  

E-Print Network (OSTI)

Environmental Management, Inc. It has been subject to the Agency’s peer and administrative review, and it has been approved for publication as an EPA document. The opinions, findings, and conclusions expressed herein are those of the contractor and not necessarily those of the EPA or other cooperating agencies. Mention of company or product names is not to be construed as an endorsement by the agency. Foreword The U.S. Environmental Protection Agency is charged by Congress with protecting the Nation’s land, air, and water resources. Under a mandate of national environmental laws, the Agency strives to formulate and implement actions leading to a compatible balance between human activities and the ability of natural systems to support and nurture life. To meet this mandate, EPA’s research program is providing data and technical support for solving environmental problems today and building a science knowledge base necessary to manage our ecological resources wisely, understand how pollutants affect our health, and prevent or reduce environmental risks in the future. The National Risk Management Research Laboratory is the Agency’s center for investigation of technological and management approaches for reducing risks from threats to human health and the environment. The focus of the Laboratory’s research program is on methods for the prevention and control of pollution to air, land, water and subsurface resources; protection of water quality in public water systems; remediation of contaminated sites and ground water; and prevention and control of indoor air pollution. The goal of this research effort is to catalyze development and implementation of innovative, cost-effective environmental technologies;

unknown authors

1995-01-01T23:59:59.000Z

55

Thresholds of Raman backscatter: effects of collisions and Landau damping  

Science Conference Proceedings (OSTI)

We present 1.5 dimensional simulations and theory of the threshold of Raman backscatter for a variety of density profiles, background temperatures and collision frequencies, nu/sub ei/. The simulations show Raman backscatter of approx. 4 x 10/sup -4/ at intensities approx. 30 times below the del n threshold which we suggest is due to light scattering off of noise electron plasma waves. The absorption drops significantly and the threshold rises as the Landau damping ..omega../sub i/ and/or nu/sub ei/ approach the growth rate ..gamma../sub 0/. Many experiments are already in the collisional regime.

Estabrook, K.; Kruer, W.L.

1983-11-03T23:59:59.000Z

56

Segmentation of Satellite Imagery Using Hierarchical Thresholding and Neural Networks  

Science Conference Proceedings (OSTI)

A significant task in the automated interpretation of cloud features on satellite imagery is the segmentation of the image into separate cloud features to be identified. A new technique, hierarchical threshold segmentation (HTS), is presented. In ...

James E. Peak; Paul M. Tag

1994-05-01T23:59:59.000Z

57

Energy-efficient threshold circuits computing mod functions  

Science Conference Proceedings (OSTI)

We prove that the modulus function MODm of n variables can be computed by a threshold circuit C of energy e and size s = O(e(n/m)1/(e?1)) for any integer e ? ...

Akira Suzuki, Kei Uchizawa, Xiao Zhou

2011-01-01T23:59:59.000Z

58

Bound states at threshold resulting from Coulomb repulsion  

SciTech Connect

The eigenvalue absorption for a many-particle Hamiltonian depending on a parameter is analyzed in the framework of non-relativistic quantum mechanics. The long-range part of pair potentials is assumed to be pure Coulomb and no restriction on the particle statistics is imposed. It is proved that if the lowest dissociation threshold corresponds to the decay into two likewise non-zero charged clusters then the bound state, which approaches the threshold, does not spread and eventually becomes the bound state at threshold. The obtained results have applications in atomic and nuclear physics. In particular, we prove that an atomic ion with the critical charge Z{sub cr} and N{sub e} electrons has a bound state at threshold given that Z{sub cr} Element-Of (N{sub e}- 2, N{sub e}- 1), whereby the electrons are treated as fermions and the mass of the nucleus is finite.

Gridnev, Dmitry K. [FIAS, Ruth-Moufang Strasse 1, D-60438 Frankfurt am Main (Germany)

2012-10-15T23:59:59.000Z

59

Power Analysis of Sub-threshold Logics for Security Applications.  

E-Print Network (OSTI)

??Requirements of ultra-low power for many portable devices have drawn increased attention to digital sub-threshold logic design. Major reductions in power consumption and frequency of… (more)

Haghighizadeh, Farhad

2012-01-01T23:59:59.000Z

60

On rewiring and simplification for canonicity in threshold logic circuits  

Science Conference Proceedings (OSTI)

Rewiring is a well developed and widely used technique in the synthesis and optimization of traditional Boolean logic designs. The threshold logic is a new alternative logic representation to Boolean logic which poses a compactness characteristic of ...

Pin-Yi Kuo; Chun-Yao Wang; Ching-Yi Huang

2011-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "bispectral threshold method" 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

Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment  

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

Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment Print A threshold law describes the dependence of a reaction yield near a reaction threshold. It is also a...

62

Observed physical processes in mechanical tests of PBX9501 and recomendations for experiments to explore a possible plasticity/damage threshold  

Science Conference Proceedings (OSTI)

This memo discusses observations that have been made in regards to a series of monotonic and cyclic uniaxial experiments performed on PBX9501 by Darla Thompson under Enhanced Surveilance Campaign support. These observations discussed in Section Cyclic compression observations strongly suggest the presence of viscoelastic, plastic, and damage phenomena in the mechanical response of the material. In Secton Uniaxial data analysis and observations methods are discussed for separating out the viscoelastic effects. A crude application of those methods suggests the possibility of a critical stress below which plasticity and damage may be negligible. The threshold should be explored because if it exists it will be an important feature of any constitutive model. Additionally, if the threshold exists then modifications of experimental methods may be feasible which could potentially simplify future experiments or provide higher quality data from those experiments. A set of experiments to explore the threshold stress are proposed in Section Exploratory tests program for identifying threshold stress.

Buechler, Miles A. [Los Alamos National Laboratory

2012-05-02T23:59:59.000Z

63

Rydberg and autoionizing triplet states in Helium up to the N = 5 threshold  

Science Conference Proceedings (OSTI)

Energy levels of highly excited bound Rydberg states, the position and widths of autoionizing states, and oscillator strengths are calculated for He {sup 3}S, {sup 3}P{sup e}, {sup 3}P{sup o}, {sup 3}D{sup e} and {sup 3}D{sup o} symmetries up to the N = 5 He{sup +} excitation threshold. The calculations are performed with the K-matrix B-spline method with maximum orbital angular momentum l{sub max} = 8. Reliable doubly excited-state parameters up to the n = 20 multiplet below each ionization threshold are presented. One thousand and six hundred newly identified bound and metastable states, seven times those available in literature, fill many gaps, reveal a dozen intruder states, and allow new speculations on propensity rules and radiative decays of triplet Rydberg states.

Argenti, L. [DICASM, Universita di Bologna, via Saragozza 8, I-40136 Bologna (Italy)], E-mail: luca.argenti@gmail.com

2008-11-15T23:59:59.000Z

64

Threshold energy surface and Frenkel-pair resistivity for Cu  

SciTech Connect

In-situ electrical resistivity damage-rate measurements in the high voltage electron microscope have been used to study electron-irradiation-induced defect production in copper single crystals at T < 10/sup 0/K. Analysis of the directional and energy dependence yields a threshold energy surface that is significantly different from those of previous investigations: two pockets of low threshold energy centered at <100> and <110> surrounded by regions of much higher threshold energy. The corresponding damage function exhibits a plateau of 0.6 Frenkel pairs. the present results imply a Frenkel pair resistivity for C of (2.75/sub -0.2//sup +0.6/) x ..cap omega..-cm.

King, W.E.; Merkle, K.L.; Meshii, M.

1982-01-01T23:59:59.000Z

65

Determination of Response Threshold of Optical Current Transformer  

Science Conference Proceedings (OSTI)

For an all-electric ship, power system is not only the energy source of power distribution, but also the energy source of ship driving system, so it is the development direction of ship in future. The optical current transformer is very important in ... Keywords: Response, Resolution threshold, Optical Current Transformer, Microminiaturization

Wang Jia-Ying, Fu Hai-Yan, Zhang Guo-Qing, Yu Wen-Bin, Cheng Song, Guo Zhi-Zhong

2012-12-01T23:59:59.000Z

66

Dynamic buffer management using per-queue thresholds: Research Articles  

Science Conference Proceedings (OSTI)

Shared buffer switches consist of a memory pool completely shared among output ports of a switch. Shared buffer switches achieve low packet loss performance as buffer space is allocated in a flexible manner. However, this type of buffered switches suffers ... Keywords: buffer management, dynamic thresholds, shared memory switch

B. Gazi; Z. Ghassemlooy

2007-05-01T23:59:59.000Z

67

A simple threshold authenticated key exchange from short secrets  

Science Conference Proceedings (OSTI)

This paper brings the password-based authenticated key exchange (PAKE) problem closer to practice. It takes into account the presence of firewalls when clients communicate with authentication servers. An authentication server can indeed be seen as two ... Keywords: password-based authentication, threshold protocols

Michel Abdalla; Olivier Chevassut; Pierre-Alain Fouque; David Pointcheval

2005-12-01T23:59:59.000Z

68

A Threshold Autoregressive Model for Wholesale Electricity Prices  

E-Print Network (OSTI)

A Threshold Autoregressive Model for Wholesale Electricity Prices B. Ricky Rambharat, Department, 2003 Abstract We introduce a discrete-time model for electricity prices, which accounts for both spikes Introduction The study of electricity price dynamics has attracted significant attention from researchers

69

A Threshold Autoregressive Model for Wholesale Electricity Prices  

E-Print Network (OSTI)

A Threshold Autoregressive Model for Wholesale Electricity Prices B. Ricky Rambharat Carnegie model; electricity prices; spikes; Markov chain Monte Carlo. 1. Introduction The dynamics of electricity of electricity price dynamics is essential for pricing and hedging financial futures and options on power

70

Database of average-power damage thresholds at 1064 nm  

Science Conference Proceedings (OSTI)

We have completed a database of average-power, laser-induced, damage thresholds at 1064 nm on a variety of materials. Measurements were made with a newly constructed laser to provide design input for moderate and high average-power laser projects. The measurements were conducted with 16-ns pulses at pulse-repetition frequencies ranging from 6 to 120 Hz. Samples were typically irradiated for time ranging from a fraction of a second up to 5 minutes (36,000 shots). We tested seven categories of samples which included antireflective coatings, high reflectors, polarizers, single and multiple layers of the same material, bare and overcoated metal surfaces, bare polished surfaces, and bulk materials. The measured damage threshold ranged from 46 J/cm/sup 2/ for a bare polished glass substrate. 4 refs., 7 figs., 1 tab.

Rainer, F.; Hildum, E.A.; Milam, D.

1987-12-14T23:59:59.000Z

71

Threshold Properties of the K{Lambda} Photoproduction  

Science Conference Proceedings (OSTI)

We have investigated kaon photoproduction on a proton and a neutron near their production thresholds by utilizing an isobar model. The background term of the model is constructed from Feynman diagrams, while the resonance term is derived from the multipoles formalism. In the case of the {gamma}+p{yields}K{sup +}+{Lambda} channel we found that both pseudoscalar (PS) and pseudovector (PV) models are able to reproduce the available photoproduction data up to W = 50 MeV above the threshold. The hyperon resonance S{sub 01}(1800) is found to be important in improving the agreement between model calculation and experimental data. In the case of double polarization observables O{sub x}, and O{sub z}, our result is in agreement with the finding of Sandorfi et al. In the {gamma}+n{yields}K{sup 0}+{Lambda} channel we found that the difference between PS and PV models is sizable for future experiments.

Mart, T. [Departemen Fisika, FMIPA, Universitas Indonesia, Depok 16424 (Indonesia)

2010-12-23T23:59:59.000Z

72

On "Sub-Threshold" Reactions Involving Nuclear Fission  

E-Print Network (OSTI)

We analyze reactions of several types that are naively below threshold but can proceed because of the release of binding energy from nuclear fission and occasionally the formation of Coulombic bound states. These reactions include (i) photofission with pion production and (ii) charged current neutrino-nucleus reactions that lead to fission and/or formation of a Coulomb bound state of a $\\mu^-$ with the nucleus of a fission fragment. We comment on the possible experimental observation of these reactions.

M. Goldhaber; R. Shrock

2000-11-29T23:59:59.000Z

73

Interference in above-threshold-ionization electron distributions from molecules  

SciTech Connect

We present quantum-mechanical studies on above-threshold ionization of molecular ions in two and three dimensions. The momentum distributions show signatures of interfering emissions from the molecular centers. These structures deviate from a simple double-slit model that ignores the electron-ion interaction, but they are reproduced by an eikonal model. Such distortions of the interference pattern are partly responsible for the absence of clear interference patterns in the angle-integrated electron energy spectra.

Henkel, Jost [Institut fuer Physikalische und Theoretische Chemie, Universitaet Wuerzburg, and Roentgen Research Center for Complex Material Systems, Am Hubland, D-97074 Wuerzburg (Germany); Institut fuer Theoretische Physik and Centre for Quantum Engineering and Space-Time Research (QUEST), Leibniz Universitaet Hannover Appelstrasse 2, D-30167 Hannover (Germany); Lein, Manfred [Institut fuer Theoretische Physik and Centre for Quantum Engineering and Space-Time Research (QUEST), Leibniz Universitaet Hannover Appelstrasse 2, D-30167 Hannover (Germany); Engel, Volker [Institut fuer Physikalische und Theoretische Chemie, Universitaet Wuerzburg, and Roentgen Research Center for Complex Material Systems, Am Hubland, D-97074 Wuerzburg (Germany)

2011-05-15T23:59:59.000Z

74

Threshold energy surface and Frenkel-pair resistivity for Cu  

Science Conference Proceedings (OSTI)

In-situ electrical resistivity damage-rate measurements in the high voltage electron microscope have been used to study electron-irradiation-induced defect production in copper single crystals at T and surrounded by regions of much higher threshold energy. The corresponding damage function exhibits a plateau of 0.6 Frenkel pairs. the present results imply a Frenkel pair resistivity for C of (2.75/sub -0.2//sup +0.6/) x ..cap omega..-cm.

King, W.E.; Merkle, K.L.; Meshii, M.

1982-01-01T23:59:59.000Z

75

Constant threshold correction to electrically charged dilatonic black holes  

E-Print Network (OSTI)

We investigate the effect of a constant threshold correction to a general non-extreme, static, spherically symmetric, electrically charged black hole solution of the dilatonic Einstein-Maxwell Lagrangian, with an arbitrary coupling $\\beta$ between the electromagnetic tensor and the dilaton field. For a small $\\beta$, an exact analytical solution is obtained. For an arbitrary of the metric and the dilaton are presented. In the extremal limit, the close form solution is reduced to an exact analytical form.

Chan, K L

1996-01-01T23:59:59.000Z

76

Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment  

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

Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment Print Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment Print A threshold law describes the dependence of a reaction yield near a reaction threshold. It is also a signature of the physical forces involved in the reaction, so the agreement of an observed threshold behavior with a threshold law or a departure from it can be a sensitive probe into how well the reaction physics is understood. A collaboration from Western Michigan University, the ALS, and Denison University has now shown that the threshold laws for inner-shell photodetachment of negative ions are not only obeyed but can extend over a much wider energy range than theory had predicted. Crossing a Threshold In physics and chemistry, a threshold refers to the minimum energy required for a reaction to just become observable. A threshold law mathematically describes the reaction yield as the energy varies near the threshold. For ionization of an atom, for example, the threshold is the minimum energy needed to eject an electron, and the threshold behavior of the ionization depends only on the Coulomb (electrical) attraction between the positively charged nucleus and negatively charged electron. When absorption of light causes removal (photodetachment) of an electron from a negatively charged ion (atom with one extra electron) the story changes because the negative electron is bound to a neutral atom.

77

Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment  

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

Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment Print Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment Print A threshold law describes the dependence of a reaction yield near a reaction threshold. It is also a signature of the physical forces involved in the reaction, so the agreement of an observed threshold behavior with a threshold law or a departure from it can be a sensitive probe into how well the reaction physics is understood. A collaboration from Western Michigan University, the ALS, and Denison University has now shown that the threshold laws for inner-shell photodetachment of negative ions are not only obeyed but can extend over a much wider energy range than theory had predicted. Crossing a Threshold In physics and chemistry, a threshold refers to the minimum energy required for a reaction to just become observable. A threshold law mathematically describes the reaction yield as the energy varies near the threshold. For ionization of an atom, for example, the threshold is the minimum energy needed to eject an electron, and the threshold behavior of the ionization depends only on the Coulomb (electrical) attraction between the positively charged nucleus and negatively charged electron. When absorption of light causes removal (photodetachment) of an electron from a negatively charged ion (atom with one extra electron) the story changes because the negative electron is bound to a neutral atom.

78

Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment  

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

Long-Range Validity of Threshold Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment Print Wednesday, 29 March 2006 00:00 A threshold law describes the dependence of a reaction yield near a reaction threshold. It is also a signature of the physical forces involved in the reaction, so the agreement of an observed threshold behavior with a threshold law or a departure from it can be a sensitive probe into how well the reaction physics is understood. A collaboration from Western Michigan University, the ALS, and Denison University has now shown that the threshold laws for inner-shell photodetachment of negative ions are not only obeyed but can extend over a much wider energy range than theory had predicted.

79

(SE-33)Intelligent ID-Based threshold system by an encryption and decryption from bilinear pairing  

Science Conference Proceedings (OSTI)

We suggest a new intelligent ID-based threshold secure system by an encryption and decryption protocol using (k, n)-threshold scheme which only k agents or more are engaged to reconstruct an encrypted data for a mobile intelligent ...

Young Whan Lee; Byung Mun Choi

2005-09-01T23:59:59.000Z

80

Generalized Adjoint for Physical Processes with Parameterized Discontinuities. Part III: Multiple Threshold Conditions  

Science Conference Proceedings (OSTI)

The generalized adjoint is extended to special situations in which the concerned switches are triggered simultaneously by more than one threshold condition. It is shown that the involved threshold conditions can be combined into a single ...

Qin Xu

1997-12-01T23:59:59.000Z

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


81

On the optimal blacklisting threshold for link selection in wireless sensor networks  

Science Conference Proceedings (OSTI)

Empirical studies on link blacklisting show that the delivery rate is sensitive to the calibration of the blacklisting threshold. If the calibration is too restrictive (the threshold is too high), all neighbors get blacklisted. On the other hand, if ...

Flavio Fabbri; Marco Zuniga; Daniele Puccinelli; Pedro Marrón

2012-02-01T23:59:59.000Z

82

Novel Resonant-Tunneling Multiple-Threshold Logic Circuit Based on Switching Sequence Detection  

Science Conference Proceedings (OSTI)

We present a novel multiple-threshold circuit using resonant-tunneling diodes (RTDs). The logic operation is based on detecting a switching sequence in the RTD circuit. This scheme enables us to increase the number of threshold voltages by more than ... Keywords: Resonant-tunneling diode, Multiple-threshold, analog-to-digital converter

Takao Waho; Kazufumi Hattori; Kouji Honda

2000-05-01T23:59:59.000Z

83

Investigation of the Cause of Low Blister Threshold Temperatures in the RERTR-12 and AFIP-4 Experiments  

SciTech Connect

Blister–threshold testing of fuel plates is a standard method through which the safety margin for operation of plate-type in research and test reactors is assessed. The blister-threshold temperature is indicative of the ability of fuel to operate at high temperatures for short periods of time (transient conditions) without failure. This method of testing was applied to the newly developed U-Mo monolithic fuel system. Blister annealing studies on the U-Mo monolithic fuel plates began in 2007, with the Reduced Enrichment for Research and Test Reactors (RERTR)-6 experiment, and they have continued as the U-Mo fuel system has evolved through the research and development process. Blister anneal threshold temperatures from early irradiation experiments (RERTR-6 through RERTR-10) ranged from 400 to 500°C. These temperatures were projected to be acceptable for NRC-licensed research reactors and the high-power Advanced Test Reactor (ATR) and the High Flux Isotope Reactor (HFIR) based on current safety-analysis reports (SARs). Initial blister testing results from the RERTR-12 experiment capsules X1 and X2 showed a decrease in the blister-threshold temperatures. Blister threshold temperatures from this experiment ranged from 300 to 400°C. Selected plates from the AFIP-4 experiment, which was fabricated using a process similar to that used to fabricate the RERTR-12 experiment, also underwent blister testing to determine whether results would be similar. The measured blister-threshold temperatures from the AFIP-4 plates fell within the same blister-threshold temperature range measured in the RERTR-12 plates. Investigation of the cause of this decrease in bister threshold temperature is being conducted under the guidance of Idaho National Laboratory PLN-4155, “Analysis of Low Blister Threshold Temperatures in the RERTR-12 and AFIP-4 Experiments,” and is driven by hypotheses. The main focus of the investigation is in the following areas: 1. Fabrication variables 2. Pre-irradiation characterization 3. Irradiation conditions 4. Post-irradiation examination 5. Additional blister testing 6. Mechanical modeling This report documents the preliminary results of this investigation. Several hypotheses can be dismissed as a result of this investigation. Two primary categories of causes remain. The most prominent theory, supported by the data, is that low blister-threshold temperature is the result of mechanical energy imparted on the samples during the fabrication process (hot and cold rolling) without adequate post processing (annealing). The mechanisms are not clearly understood and require further investigation, but can be divided into two categories: • Residual Stress • Undesirable interaction boundary and/or U-Mo microstructure change A secondary theory that cannot be dismissed with the information that is currently available is that a change in the test conditions has resulted in a statistically significant downward shift of measured blister temperature. This report outlines the results of the forensic investigations conducted to date. The data and conclusions presented in this report are preliminary. Definitive cause and effect relationships will be established by future experimental programs.

Mitchell K Meyer

2012-06-01T23:59:59.000Z

84

Electron Rescattering in Above-Threshold Photodetachment of Negative Ions  

Science Conference Proceedings (OSTI)

We present experimental and theoretical results on photodetachment of Br{sup -} and F{sup -} in a strong infrared laser field. The observed photoelectron spectra of Br{sup -} exhibit a high-energy plateau along the laser polarization direction, which is identified as being due to the rescattering effect. The shape and the extension of the plateau is found to be influenced by the depletion of negative ions during the interaction with the laser pulse. Our findings represent the first observation of electron rescattering in above-threshold photodetachment of an atomic system with a short-range potential.

Gazibegovic-Busuladzic, A. [Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, 71000 Sarajevo, Bosnia and Herzegovina (Bosnia and Herzegowina); Milosevic, D. B. [Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, 71000 Sarajevo, Bosnia and Herzegovina (Bosnia and Herzegowina); Max-Born-Institut, Max-Born-Strasse 2a, D-12489 Berlin (Germany); Becker, W. [Max-Born-Institut, Max-Born-Strasse 2a, D-12489 Berlin (Germany); Bergues, B.; Hultgren, H.; Kiyan, I. Yu. [Albert-Ludwigs-Universitaet, D-79104 Freiburg (Germany)

2010-03-12T23:59:59.000Z

85

Photoproduction of the phi (1020) near threshold in CLAS  

DOE Green Energy (OSTI)

and kinematical coverage. Complete measurements of phi meson production on the proton have been performed at the Thomas Jefferson National Accelerator Facility using a liquid hydrogen target and the CEBAF Large Acceptance Spectrometer (CLAS). The phi was identified by missing mass using a proton and positive kaon detected by CLAS in coincidence with an electron in the photon tagger. The energy of the tagged, bremsstrahlung photons ranged from phi-threshold to 2.4 GeV. A description of the data set and the differential cross section far (E_{gamma} = 2.0 GeV ) will be presented and compared with present theoretical calculations.

D.J. Tedeschi

2002-06-01T23:59:59.000Z

86

NRC Consent to Indirect License Transfer/Threshold Determination- Merger  

E-Print Network (OSTI)

Company ("CY"), and Yankee Atomic Electric Company ("YR") (each a "Yankee Company," and together, "the Yankee Companies"), hereby respond to the Nuclear Regulatory Commission ("NRC") Third Request for Additional Information for Application for NRC Consent to Indirect License Transfer/Threshold Determination (TAC Nos. L24496, L24497, and L24498) ("RAI 3") received by the Yankee Companies on August 5, 2011. If you have questions or require additional information, please contact me or Joe Fay at (207) 350-0300. Sincerely, Wayne Norton

The Yankee Companies

2011-01-01T23:59:59.000Z

87

An HI Threshold for Star Cluster Formation in Tidal Debris  

E-Print Network (OSTI)

Super star clusters are young, compact star clusters found in the central regions of interacting galaxies. Recently, they have also been reported to preferentially form in certain tidal tails, but not in others. In this paper, we have used 21 cm HI maps and the Hubble Space Telescope Wide Field Planetary Camera 2 images of eight tidal tail regions of four merging galaxy pairs to compare the kiloparsec scale HI distribution with the location of super star clusters found from the optical images. For most of the tails, we find that there is an increase in super star cluster density with increasing projected HI column density, such that the star cluster density is highest when log N(HI) >= 20.6 cm^{-2}, but equal to the background count rate at lower HI column density. However, for two tails (NGC 4038/39 Pos A and NGC 3921), there is no significant star cluster population despite the presence of gas at high column density. This implies that the N(HI) threshold is a necessary but not sufficient condition for cluster formation. Gas volume density is likely to provide a more direct criterion for cluster formation, and other factors such as gas pressure or strength of encounter may also have an influence. Comparison of HI thresholds needed for formation of different types of stellar structures await higher resolution HI and optical observations of larger numbers of interacting galaxies.

A. Maybhate; J. Masiero; J. E. Hibbard; J. C. Charlton; C. Palma; K. A. Knierman; J. English

2007-07-24T23:59:59.000Z

88

ATTRIBUTES AND THRESHOLDS IN MEASUREMENTS FOR TRANSPARENCY INITIATIVES  

SciTech Connect

The collection of programs broadly termed Transparency Initiatives frequently involves physics measurements that are applied to items with sensitive or classified properties. The inability or reluctance to perform quantitative measurements, in the safeguards tradition, to such items, and then to expose the results to international examination, has impelled development of an attributes approach to measurements, following the philosophy if it looks like a duck, walks like a duck and quacks like a duck, call it a duck, This approach avoids certain of the classification issues that would otherwise be associated with such measurements. Use of the attributes approach, however, continues to pose problems of interpretation, in light of the need to establish numerical thresholds whereby data obtained from the measurements can be evaluated to determine whether the attribute is present. In this paper we examine the foundations of the attributes approach and the steps used to determine appropriate attributes and thresholds, using examples from contemporary threat-reduction initiatives where possible. Implications for the detector technologies used in the measurements will be discussed, as will the characteristics of so-called information barriers intended to prevent inadvertent release of sensitive information during attributes measurements.

M. W. JOHNSON

2000-09-01T23:59:59.000Z

89

Nonlinear threshold behavior during the loss of Arctic sea ice  

E-Print Network (OSTI)

In light of the rapid recent retreat of Arctic sea ice, a number of studies have discussed the possibility of a critical threshold (or "tipping point") beyond which the ice-albedo feedback causes the ice cover to melt away in an irreversible process. The focus has typically been centered on the annual minimum (September) ice cover, which is often seen as particularly susceptible to destabilization by the ice-albedo feedback. Here we examine the central physical processes associated with the transition from ice-covered to ice-free Arctic Ocean conditions. We show that while the ice-albedo feedback promotes the existence of multiple ice cover states, the stabilizing thermodynamic effects of sea ice mitigate this when the Arctic Ocean is ice-covered during a sufficiently large fraction of the year. These results suggest that critical threshold behavior is unlikely during the approach from current perennial sea ice conditions to seasonally ice-free conditions. In a further warmed climate, however, we find that a ...

Eisenman, I; 10.1073/pnas.0806887106

2008-01-01T23:59:59.000Z

90

Threshold effect in lead-induced peripheral neuropathy  

Science Conference Proceedings (OSTI)

We previously demonstrated a negative correlation between blood lead level and motor nerve conduction velocity in 202 asymptomatic 5 to 9-year-old children living near a lead smelter in Idaho. Blood lead levels ranged from 13 to 97 micrograms/dL. To determine whether a threshold exists between blood lead level and maximal motor nerve conduction velocity, we conducted three regression analyses on these data: a ''hockey stick'' regression, a logistic regression, and a quadratic regression. We found evidence for a threshold in all three analyses: at a blood level of 30 micrograms/dL in the ''hockey stick'' regression, at 20 micrograms/dL in the logistic, and at 25 to 30 micrograms/dL in the quadratic. Neither age, sex, socioeconomic status, nor duration of residence near the smelter significantly modified the relationship. These analyses confirm that asymptomatic increased lead absorption causes slowing of nerve conduction, but they also indicate that measurement of maximal motor nerve conduction velocity is an insensitive screen for low-level lead toxicity.

Schwartz, J.; Landrigan, P.J.; Feldman, R.G.; Silbergeld, E.K.; Baker, E.L. Jr.; von Lindern, I.H.

1988-01-01T23:59:59.000Z

91

A STELLAR MASS THRESHOLD FOR QUENCHING OF FIELD GALAXIES  

SciTech Connect

We demonstrate that dwarf galaxies (10{sup 7} < M{sub stellar} < 10{sup 9} M{sub Sun }, -12 > M{sub r} > -18) with no active star formation are extremely rare (<0.06%) in the field. Our sample is based on the NASA-Sloan Atlas which is a reanalysis of the Sloan Digital Sky Survey Data Release 8. We examine the relative number of quenched versus star-forming dwarf galaxies, defining quenched galaxies as having no H{alpha} emission (EW{sub H{alpha}} < 2 A) and a strong 4000 A break. The fraction of quenched dwarf galaxies decreases rapidly with increasing distance from a massive host, leveling off for distances beyond 1.5 Mpc. We define galaxies beyond 1.5 Mpc of a massive host galaxy to be in the field. We demonstrate that there is a stellar mass threshold of M{sub stellar} < 1.0 Multiplication-Sign 10{sup 9} M{sub Sun} below which quenched galaxies do not exist in the field. Below this threshold, we find that none of the 2951 field dwarf galaxies are quenched; all field dwarf galaxies show evidence for recent star formation. Correcting for volume effects, this corresponds to a 1{sigma} upper limit on the quenched fraction of 0.06%. In more dense environments, quenched galaxies account for 23% of the dwarf population over the same stellar mass range. The majority of quenched dwarf galaxies (often classified as dwarf elliptical galaxies) are within 2 virial radii of a massive galaxy, and only a few percent of quenched dwarf galaxies exist beyond 4 virial radii. Thus, for galaxies with stellar mass less than 1.0 Multiplication-Sign 10{sup 9} M{sub Sun }, ending star formation requires the presence of a more massive neighbor, providing a stringent constraint on models of star formation feedback.

Geha, M. [Astronomy Department, Yale University, New Haven, CT 06520 (United States); Blanton, M. R.; Yan, R.; Tinker, J. L., E-mail: marla.geha@yale.edu [Center for Cosmology and Particle Physics, Department of Physics, New York University, 4 Washington Place, New York, NY 10003 (United States)

2012-09-20T23:59:59.000Z

92

Sympathetic Cooling of Molecular Ions in Selected Rotational and Vibrational States Produced by Threshold Photoionization  

SciTech Connect

We present a new method for the generation of rotationally and vibrationally state-selected, translationally cold molecular ions in ion traps. Our technique is based on the state-selective threshold photoionization of neutral molecules followed by sympathetic cooling of the resulting ions with laser-cooled calcium ions. Using N{sub 2}{sup +} ions as a test system, we achieve >90% selectivity in the preparation of the ground rovibrational level and state lifetimes on the order of 15 minutes limited by collisions with background-gas molecules. The technique can be employed to produce a wide range of apolar and polar molecular ions in the ground and excited rovibrational states. Our approach opens up new perspectives for cold quantum-controlled ion-molecule-collision studies, frequency-metrology experiments with state-selected molecular ions and molecular-ion qubits.

Tong Xin; Winney, Alexander H.; Willitsch, Stefan [Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056 Basel (Switzerland)

2010-10-01T23:59:59.000Z

93

Threshold levels for toxic effects of sediment-associated PAHs on marine biota from urban and nonurban embayments of the United States  

Science Conference Proceedings (OSTI)

The Environmental Conservation Division of the National Marine Fisheries Service has been conducting studies investigating the effects of marine pollution on the health of benthic fish since 1979. A large amount of data relating biological effects to exposure to sediments contaminated with polycyclic aromatic hydrocarbons (PAHs) exists as a result of the many field and laboratory studies conducted since this time. These effects include the presence of hepatic lesions, high biliary levels of PAH metabolites, elevated activity of hepatic xenobiotic metabolizing enzymes and include the presence of hepatic lesions, high biliary levels of PAH metabolites, elevated activity of hepatic xenobotic metabolizing enzymes and impaired reproductive success. A comprehensive analysis of these data was undertaken in an effort to estimate thresholds for concentrations of PAHs in sediment below which the effects previously describe did not occur. Our primary objectives were to determine: (1) at what levels of chemical contamination are thresholds observed for those species examined and (2) how our findings compare with the sediment quality standards of other agencies. Thresholds were determined with the Hockey Stick regression model. Our results show that most effects exhibit thresholds at 500-1000 ng/g, with slight variances among species due to differences in sensitivity. These values are considerably lower than standards derived from the Apparent Effects Threshold and other similar methods used for evaluating sediment toxicity. This approach yields significant insight into the impact of low level contamination and may provide a useful alternative for evaluating sediment quality within urban areas.

Lomax, D.P.; Horness, B.H.; Johnson, L.L.; Landahl, J.T.; Varanasi, U. (Northwest Fisheries Science Center, Seattle, WA (United States))

1994-06-01T23:59:59.000Z

94

Improved current saturation and shifted switching threshold voltage in In2O3 nanowire based, fully transparent NMOS inverters via femtosecond laser annealing  

E-Print Network (OSTI)

Transistors based on various types of non-silicon nanowires have shown great potential for a variety of applications, especially for those require transparency and low-temperature substrates. However, critical requirements for circuit functionality such as saturated source-drain current, and matched threshold voltages of individual nanowire transistors in a way that is compatible with low temperature substrates, have not been achieved. Here we show that femtosecond laser pulses can anneal individual transistors based on In2O3 nanowires, improve the saturation of the source-drain current, and permanently shift the threshold voltage to the positive direction. We applied this technique and successfully shifted the switching threshold voltages of NMOS based inverters and improved their noise margin, in both depletion and enhancement modes. Our demonstration provides a method to trim the parameters of individual nanowire transistors, and suggests potential for large-scale integration of nanowire-based circuit bloc...

Lee, Chunghun; Srisungsitthisunti, Pornsak; Kim, Seongmin; Zhou, Chongwu; Janes, David B; Xu, Xianfan; Roy, Kaushik; Ju, Sanghyun; Qi, Minghao

2010-01-01T23:59:59.000Z

95

Adaptive-window indicator kriging: A thresholding method for computed tomography images of porous media  

Science Conference Proceedings (OSTI)

Image segmentation is a crucial step in understanding the structure of porous materials, subsequent analyses being profoundly dependent upon segmentation accuracy. Computed tomography images of naturally occurring heterogeneous materials such as soils ... Keywords: Indicator kriging, Local segmentation, Microtomography, Soil, X-ray

A. N. Houston, W. Otten, P. C. Baveye, S. Hapca

2013-04-01T23:59:59.000Z

96

Frontal Rainfall-Rate Distribution and Some Conclusions on the Threshold Method  

Science Conference Proceedings (OSTI)

In this paper, the delta function is introduced to describe the observed rainfall-rate distribution including the mixture of discrete and continuous parts. Thus the observed rainfall-rate distribution can be expressed as a simple mathematical ...

Minghu Cheng; Yanjun Qi

2002-11-01T23:59:59.000Z

97

Hydrodynamic sweepout thresholds in BWR Mark III reactor cavity interactions  

DOE Green Energy (OSTI)

Simulant-material experiments and related analysis are described which investigated hydrodynamics aspects of ex-vessel interactions following postulated core meltdown with subsequent meltthrough of the vessel lower head and ejection of molten corium from the vessel into the containment region beneath the vessel. Objectives were to examine the possible sweepout of water and corium from the cavity by the steam/H/sub 2/ flow. The dispersal pathways in this containment design include a single manway and four CRD penetrations in the cylindrical pedestal wall connecting to the drywell with a combined cross-sectional area of approx. 10 m/sup 2/. These openings range from 3.4 to 6.3 m in elevation off the concrete floor of the cavity. The experiments were performed using a 1:34 scale mock-up of the RPV/pedestal region. The first tests were quasi-steady tests. Tests were also performed using molten Wood's metal (WM). Some tests were performed with water on the cavity floor, and one test was performed using steel shot. The test results indicated that threshold gas flowrates existed beyond which dispersal of water and/or corium from the cavity can be expected. The predominant dispersal flow regime observed in the experiments involved fluidization of the water or molten WM by the gas flowrate through the system and sweepout of the fluidized liquid droplets as the gas exited the cavity through the openings in the wall. The superficial gas velocity at the onset of water sweepout ranged from 0.87 to 1.04 m/s in the tests which agrees very closely to the calculated fluidization threshold of 0.96 m/s. Application of the fluidization model for prediction of sweepout for the full-size system suggests that sweepout of water and corium can occur if the breach size in the RPV lower head exceeds approx. 10 and 17 cm dia, respectively, for steam blowdown at a vessel initial pressure of 1000 psi.

Spencer, B.W.; Baronowsky, S.P.; Kilsdonk, D.J.

1984-04-01T23:59:59.000Z

98

An HI Threshold for Star Cluster Formation in Tidal Debris  

E-Print Network (OSTI)

Super star clusters are young, compact star clusters found in the central regions of interacting galaxies. Recently, they have also been reported to preferentially form in certain tidal tails, but not in others. In this paper, we have used 21 cm HI maps and the Hubble Space Telescope Wide Field Planetary Camera 2 images of eight tidal tail regions of four merging galaxy pairs to compare the kiloparsec scale HI distribution with the location of super star clusters found from the optical images. For most of the tails, we find that there is an increase in super star cluster density with increasing projected HI column density, such that the star cluster density is highest when log N(HI) >= 20.6 cm^{-2}, but equal to the background count rate at lower HI column density. However, for two tails (NGC 4038/39 Pos A and NGC 3921), there is no significant star cluster population despite the presence of gas at high column density. This implies that the N(HI) threshold is a necessary but not sufficient condition for clust...

Maybhate, A; Hibbard, J E; Charlton, J C; Palma, C; Knierman, K A; English, J

2007-01-01T23:59:59.000Z

99

Observed Minimum Illuminance Threshold for Night Market Vendors in Kenya who use LED Lamps  

Science Conference Proceedings (OSTI)

Creation of light for work, socializing, and general illumination is a fundamental application of technology around the world. For those who lack access to electricity, an emerging and diverse range of LED based lighting products hold promise for replacing and/or augmenting their current fuel-based lighting sources that are costly and dirty. Along with analysis of environmental factors, economic models for total cost-ofownership of LED lighting products are an important tool for studying the impacts of these products as they emerge in markets of developing countries. One important metric in those models is the minimum illuminance demanded by end-users for a given task before recharging the lamp or replacing batteries. It impacts the lighting service cost per unit time if charging is done with purchased electricity, batteries, or charging services. The concept is illustrated in figure 1: LED lighting products are generally brightest immediately after the battery is charged or replaced and the illuminance degrades as the battery is discharged. When a minimum threshold level of illuminance is reached, the operational time for the battery charge cycle is over. The cost to recharge depends on the method utilized; these include charging at a shop at a fixed price per charge, charging on personal grid connections, using solar chargers, and purchasing dry cell batteries. This Research Note reports on the observed"charge-triggering" illuminance level threshold for night market vendors who use LED lighting products to provide general and task oriented illumination. All the study participants charged with AC power, either at a fixed-price charge shop or with electricity at their home.

Johnstone, Peter; Jacobson, Arne; Mills, Evan; Radecsky, Kristen

2009-03-21T23:59:59.000Z

100

An Adaptive Threshold Load Balancing Scheme for the End-to-End Reconfigurable System  

Science Conference Proceedings (OSTI)

In this paper, an adaptive threshold load balancing (ATLB) scheme is proposed for the joint load control (JOLDC) in the end-to-end reconfigurable system. The dynamic threshold based on heterogeneous load measurement is designed to adapt to varying load ... Keywords: Heterogeneous, Load balancing, Reconfigurability, Terminal selection, Vertical handover

Yongjing Zhang; Kui Zhang; Cheng Chi; Yang Ji; Zhiyong Feng; Ping Zhang

2008-07-01T23:59:59.000Z

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101

Evaluation of force and torque magnitude discrimination thresholds on the human hand-arm system  

Science Conference Proceedings (OSTI)

This article reports on experiments about haptic perception aimed at measuring the force/torque differential thresholds applied to the hand-arm system. The experimental work analyzes how force is sent back to the user by means of a 6 degrees-of-freedom ... Keywords: Force thresholds, perceptual asymmetries, perceptual-based signal processing

M. Vicentini; S. Galvan; D. Botturi; P. Fiorini

2010-10-01T23:59:59.000Z

102

Impact of MOSFET's performance on its threshold voltage and its influence on design of MOS inverters  

Science Conference Proceedings (OSTI)

The aim of this paper is to research the impact of physical parameters which characterize the MOSFET transistors structure on the threshold voltage values and its influence on critical voltage values which characterize digital circuits that contain the ... Keywords: MOSFET parameters, critical values, doped density, enhancement-type NMOS, impurities, narrow-channel, propagation delay, short-channel, threshold voltage, voltage level

Milaim Zabeli; Nebi Caka; Myzafere Limani; Qamil Kabashi

2008-04-01T23:59:59.000Z

103

Optimization Online - Threshold Boolean Form for Joint Probabilistic ...  

E-Print Network (OSTI)

Sep 14, 2012 ... Abstract: We develop a new modeling and exact solution method for stochastic programming problems that include a joint probabilistic ...

104

JET/DIII-D size scaling of the H-mode power threshold  

SciTech Connect

Previous scaling results indicate that the H-mode power threshold increases nearly linearly with the line averaged density, {bar n}{sub e}, and the toroidal field, B{sub t}. The power threshold was measured in similar, ITER-like, discharges in JET and DIII-D, at the same {bar n}{sub e} and B{sub t} in order to determine the size scaling of the power threshold. The results indicate a size scaling proportional to the surface area, S{sup 0.5}, which is weaker than the linear surface area dependence previously assumed.

Carlstrom, T.N. [General Atomics, San Diego, CA (United States); Campbell, D.J.; Cordey, J.G. [Joint European Torus, Abingdon (United Kingdom)] [and others

1995-10-01T23:59:59.000Z

105

Structure of Lambda(1405) and threshold behavior of pi Sigma scattering  

SciTech Connect

The scattering length and effective range of the pi-Sigma channel are studied in order to characterize the strangeness S = -1 meson-baryon scattering and the Lambda (1405) resonance. We examine various off-shell dependence of the amplitude in dynamical chiral models to evaluate the threshold quantities with the constraint at the KN threshold. We find that the pi-Sigma threshold parameters are important to the structure of the Lambda (1405) resonance and provide further constraints on the subthreshold extrapolation of the KN interaction.

Yoichi Ikeda, Tesuo Hyodo, Daisuke Jido, Hiroyuki Kamano, Toru Sato, Koichi Yazaki

2011-01-01T23:59:59.000Z

106

Fluence thresholds for laser-induced damage of optical components in the injector laser of the SSRL gun test facility  

E-Print Network (OSTI)

Fluence thresholds for laser-induced damage of optical components in the injector laser of the SSRL gun test facility

Bolton, P

2001-01-01T23:59:59.000Z

107

Near-threshold H/D exchange in CD{sub 3}CHO photodissociation.  

DOE Green Energy (OSTI)

Measuring the isotopic abundance of hydrogen versus deuterium atoms is a key method for interrogating reaction pathways in chemistry. H/D 'scrambling' is the intramolecular rearrangement of labile isotopes of hydrogen atoms and when it occurs through unanticipated pathways can complicate the interpretation of such experiments. Here, we investigate H/D scrambling in acetaldehyde at the energetic threshold for breaking the formyl C-H bond and reveal an unexpected unimolecular mechanism. Laser photolysis experiments of CD{sub 3}CHO show that up to 17% of the products have undergone H/D exchange to give CD{sub 2}H + DCO. Transition-state theory calculations reveal that the dominant mechanism involves four sequential H- or D-shifts to form CD{sub 2}HCDO, which then undergoes conventional C-C bond cleavage. At the lowest energy the molecule undergoes an average of 20 H- or D-shifts before products are formed, evincing significant scrambling of H and D atoms. Analogous photochemically induced isomerizations and isotope scrambling are probably important in both atmospheric chemistry and combustion reactions.

Heazlewood, B. R.; Maccarone, A. T.; Andrews, D. U.; Osborn, D. L.; Harding, L. B.; Klippenstein, S. J.; Jordan, M. J. T.; Kable, S. H. (Chemical Sciences and Engineering Division); (Univ. of Sydney); (SNL)

2011-06-01T23:59:59.000Z

108

PT-symmetric sinusoidal optical lattices at the symmetry-breaking threshold  

SciTech Connect

The PT-symmetric potential V{sub 0}[cos(2{pi}x/a)+i{lambda}sin(2{pi}x/a)] has a completely real spectrum for {lambda}{<=}1 and begins to develop complex eigenvalues for {lambda}>1. At the symmetry-breaking threshold {lambda}=1 some of the eigenvectors become degenerate, giving rise to a Jordan-block structure for each degenerate eigenvector. In general this is expected to result in a secular growth in the amplitude of the wave. However, it has been shown in a recent paper by Longhi, by numerical simulation and by the use of perturbation theory, that for a broad initial wave packet this growth is suppressed, and instead a saturation leading to a constant maximum amplitude is observed. We revisit this problem by explicitly constructing the Bloch wave functions and the associated Jordan functions and using the method of stationary states to find the dependence on the longitudinal distance z for a variety of different initial wave packets. This allows us to show in detail how the saturation of the linear growth arises from the close connection between the contributions of the Jordan functions and those of the neighboring Bloch waves.

Graefe, Eva-Maria [Mathematics Department, Imperial College, London SW7 2BZ (United Kingdom); Jones, H. F. [Physics Department, Imperial College, London SW7 2BZ (United Kingdom)

2011-07-15T23:59:59.000Z

109

The progress and challenges of threshold voltage control of high-k/metal-gated devices for advanced technologies (Invited Paper)  

Science Conference Proceedings (OSTI)

This paper discusses recent progress in and challenges of threshold voltage control for advanced high-k/metal-gated (HKMG) devices. It presents the impact on threshold voltage (V"t) control of incorporating La and Al into HKMG devices. A dipole moment ... Keywords: CMOS, Capping layer, EOT, High-k, Metal gate, Threshold voltage control

Hsing-Huang Tseng; Paul Kirsch; C. S. Park; Gennadi Bersuker; Prashant Majhi; Muhammad Hussain; Raj Jammy

2009-07-01T23:59:59.000Z

110

Effect of MOSFET threshold voltage variation on high-performance circuits  

E-Print Network (OSTI)

The driving force for the semiconductor industry growth has been the elegant scaling nature of CMOS technology. In future CMOS technology generations, supply and threshold voltages will have to continually scale to sustain ...

Narendra, Siva G. (Siva Gurusami), 1971-

2002-01-01T23:59:59.000Z

111

Analysis of an esoteric interpretation of a threshold in beta decay  

SciTech Connect

A threshold associated with a small mixing of a heavy neutrino in beta decay cannot be interpreted as due to the production of a fictitious neutral scalar in conjunction with a light neutrino.

Karl, G.; Novikov, V.; Simpson, J.J. (Department of Physics, University of Guelph, Guelph, Ontario, N1G 2W1 (Canada))

1992-11-01T23:59:59.000Z

112

Observation of a Critical Gradient Threshold for Electron Temperature Fluctuations in the DIII-D Tokamak  

E-Print Network (OSTI)

A critical gradient threshold has been observed for the first time in a systematic, controlled experiment for a locally measured turbulent quantity in the core of a confined high-temperature plasma. In an experiment in the ...

White, Anne E.

113

Recent Trends in Maximum and Minimum Temperature Threshold Exceedences in the Northeastern United States  

Science Conference Proceedings (OSTI)

Changes in the annual number of daily maximum and minimum temperature threshold exceedences between 1951 and 1993 are assessed at a network of 22 primarily rural sites in the northeastern United States. After adjusting the annual time series for ...

Arthur T. DeGaetano

1996-07-01T23:59:59.000Z

114

Future Occurrence of Threshold-Crossing Seasonal Rainfall Totals: Methodology and Application to Sites in Africa  

Science Conference Proceedings (OSTI)

A statistical simulation framework is developed to explore the future frequencies of threshold-crossing events, focusing here on low seasonal rainfall totals. Global change (GC) is represented by a trend on the seasonal mean rainfall total. ...

Asher B. Siebert; M. Neil Ward

2011-03-01T23:59:59.000Z

115

Design and Optimization of Low Voltage High Performance Dual Threshold CMOS Circuits  

E-Print Network (OSTI)

Reduction in leakage power has become an important concern in lowvoltage, lowpower and high performance applications. In this paper, we use dual threshold technique to reduce leakage power by assigning high threshold voltage to some transistors in non-critical paths, and using lowthreshold transistors in critical paths. In order to achieve the best leakage power saving under target performance constraints, an algorithm is presented for selecting and assigning an optimal high threshold voltage. A general standby leakage current model which has been veri#ed by HSPICE is used to estimate standby leakage power. Results show that dual threshold technique is good for power reduction during both standby and active modes. The standby leakage power savings for some ISCAS benchmarks can be more than 50#. 1 Introduction With the growing use of portable and wireless electronic systems, reduction in power consumption has become more and more importantintoday's VLSI circuit and system designs #1#, ...

Liqiong Wei; Zhanping Chen; Mark Johnson; Kaushik Roy; Vivek De

1998-01-01T23:59:59.000Z

116

On the Formation of Whitecaps by a Threshold Mechanism. Part II: Monte Carlo Experiments  

Science Conference Proceedings (OSTI)

This paper is the second of three which seek to evaluate the hypothesis that deep water whitecapping is predictable in terms of a threshold mechanism involving the vertical acceleration.

R. M. Kennedy; R. L. Snyder

1983-08-01T23:59:59.000Z

117

Automated and human determination of threshold contrast for digital mammography systems  

Science Conference Proceedings (OSTI)

European Guidelines for quality control in digital mammography specify minimum and achievable standards of image quality in terms of threshold contrast, based on readings of images of the CDMAM test object by human observers. However this is time-consuming ...

Kenneth C. Young; James J. H. Cook; Jennifer M. Oduko

2006-06-01T23:59:59.000Z

118

Modeling soil quality thresholds to ecosystem recovery at Fort Benning, GA, USA  

SciTech Connect

The objective of this research was to use a simple model of soil carbon (C) and nitrogen (N) dynamics to predict nutrient thresholds to ecosystem recovery on degraded soils at Fort Benning, Georgia, in the southeastern USA. Artillery, wheeled, and tracked vehicle training at military installations can produce soil disturbance and potentially create barren, degraded soils. Ecosystem reclamation is an important component of natural resource management at military installations. Four factors were important to the development of thresholds to recovery of aboveground biomass on degraded soils: (1) initial amounts of aboveground biomass, (2) initial soil C stocks (i.e., soil quality), (3) relative recovery rates of biomass, and (4) soil sand content. Forests and old fields on soils with varying sand content had different predicted thresholds for ecosystem recovery. Soil C stocks at barren sites on Fort Benning were generally below predicted thresholds to 100% recovery of desired future ecosystem conditions defined on the basis of aboveground biomass. Predicted thresholds to ecosystem recovery were less on soils with more than 70% sand content. The lower thresholds for old field and forest recovery on more sandy soils were apparently due to higher relative rates of net soil N mineralization. Calculations with the model indicated that a combination of desired future conditions, initial levels of soil quality (defined by soil C stocks), and the rate of biomass accumulation determine the predicted success of ecosystem recovery on disturbed soils.

Garten Jr, Charles T [ORNL; Ashwood, Tom L [ORNL

2004-12-01T23:59:59.000Z

119

Modeling Soil Quality Thresholds to Ecosystem Recovery at Fort Benning, Georgia, USA  

DOE Green Energy (OSTI)

The objective of this research was to use a simple model of soil C and N dynamics to predict nutrient thresholds to ecosystem recovery on degraded soils at Fort Benning, Georgia, in the southeastern USA. The model calculates aboveground and belowground biomass, soil C inputs and dynamics, soil N stocks and availability, and plant N requirements. A threshold is crossed when predicted soil N supplies fall short of predicted N required to sustain biomass accrual at a specified recovery rate. Four factors were important to development of thresholds to recovery: (1) initial amounts of aboveground biomass, (2) initial soil C stocks (i.e., soil quality), (3) relative recovery rates of biomass, and (4) soil sand content. Thresholds to ecosystem recovery predicted by the model should not be interpreted independent of a specified recovery rate. Initial soil C stocks influenced the predicted patterns of recovery by both old field and forest ecosystems. Forests and old fields on soils with varying sand content had different predicted thresholds to recovery. Soil C stocks at barren sites on Fort Benning generally lie below predicted thresholds to 100% recovery of desired future ecosystem conditions defined on the basis of aboveground biomass (18000 versus 360 g m{sup -2} for forests and old fields, respectively). Calculations with the model indicated that reestablishment of vegetation on barren sites to a level below the desired future condition is possible at recovery rates used in the model, but the time to 100% recovery of desired future conditions, without crossing a nutrient threshold, is prolonged by a reduced rate of forest growth. Predicted thresholds to ecosystem recovery were less on soils with more than 70% sand content. The lower thresholds for old field and forest recovery on more sandy soils are apparently due to higher relative rates of net soil N mineralization in more sandy soils. Calculations with the model indicate that a combination of desired future conditions, initial levels of soil quality (defined by soil C stocks), and the rate of biomass accumulation determines the predicted success of ecosystem recovery on disturbed soils.

Garten Jr., C.T.

2004-03-08T23:59:59.000Z

120

THRESHOLD PROBABILITY FUNCTIONS AND THERMAL INHOMOGENEITIES IN THE Ly{alpha} FOREST  

SciTech Connect

We introduce to astrophysics the threshold probability functions S{sub 2}, C{sub 2}, and D{sub 2} first derived by Torquato et al., which effectively samples the flux probability distribution function (PDF) of the Ly{alpha} forest at different spatial scales. These statistics are tested on mock Ly{alpha} forest spectra based on various toy models for He II reionization, with homogeneous models with various temperature-density relations as well as models with temperature inhomogeneities. These mock samples have systematics and noise added to simulate the latest Sloan Digital Sky Survey Data Release 7 (SDSS DR7) data. We find that the flux PDF from SDSS DR7 can be used to constrain the temperature-density relation {gamma} (where T{proportional_to}(1 + {Delta}){sup {gamma}-1}) of the intergalactic medium (IGM) at z = 2.5 to a precision of {Delta}{gamma} = 0.2 at {approx}4{sigma} confidence. The flux PDF is degenerate to temperature inhomogeneities in the IGM arising from He II reionization, but we find S{sub 2} can detect these inhomogeneities at {approx}3{sigma}, with the assumption that the flux continuum of the Ly{alpha} forest can be determined to 9% accuracy, approximately the error from current fitting methods. If the flux continuum can be determined to 3% accuracy, then S{sub 2} is capable of constraining the characteristic scale of temperature inhomogeneities, with {approx}4{sigma} differentiation between toy models with hot bubble radii of 50 h{sup -1} Mpc and 25 h{sup -1} Mpc.

Lee, Khee-Gan; Spergel, David N., E-mail: lee@astro.princeton.edu, E-mail: dns@astro.princeton.edu [Department of Astrophysical Science, Princeton University, Princeton, NJ 08544 (United States)

2011-06-10T23:59:59.000Z

Note: This page contains sample records for the topic "bispectral threshold method" from the National Library of EnergyBeta (NLEBeta).
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121

Near-threshold absolute angle-differential cross sections for electron-impact excitation of argon and xenon  

SciTech Connect

Absolute angle-differential cross sections for electron-impact excitation of argon and xenon atoms to the lowest four np{sup 5}(n+1)s levels, and the 5p{sup 5}5d[7/2]{sub 3} level in xenon, have been measured and calculated as a function of electron energy up to a few eV above threshold at a fixed scattering angle of 135 degree sign . For argon, very good agreement is observed between the experimental data and predictions from a Breit-Pauli B-spline R-matrix (BSR) method, in which nonorthogonal orbital sets are used to optimize the target description. The agreement is still satisfactory for the more complex xenon target, suggesting that predictions from the BSR model should already be sufficiently accurate for many modeling applications. Nevertheless, the remaining discrepancies indicate the need for further refinement of the theoretical model.

Allan, M.; Zatsarinny, O.; Bartschat, K. [Department of Chemistry, University of Fribourg, Fribourg (Switzerland); Department of Physics and Astronomy, Drake University, Des Moines, Iowa 50311 (United States)

2006-09-15T23:59:59.000Z

122

Above-threshold ionization near the 3p4d {sup 1}F{sup o} autoionizing state in magnesium  

SciTech Connect

Two-photon above-threshold ionization (ATI) relative cross sections from the 3 {sup 1}P state of Mg have been measured using two-color ionization in the focus of a magnetic bottle spectrometer and have been calculated using the Green's-function method in the Feshbach formalism and an L{sup 2}-integrable close-coupling approach, with a basis of L{sup 2}-integrable B-spline functions. We report these cross sections in the region of 3d4p {sup 1}F{sup o} autoionizing state, with photon energies of 3.3-3.6 eV. This is one of the few direct comparisons between ab initio theory and experiments in ATI in the vicinity of a Feshbach resonance. A good agreement between theory and experiment is found in the relative total cross sections.

Reber, A.; Baynard, T.; Berry, R.S. [Department of Chemistry and The James Franck Institute, University of Chicago, Chicago, Illinois 60637 (United States); Martin, F. [Departamento de Quimica C-9, Universidad Autonoma de Madrid, 28049 Madrid (Spain); Bachau, H. [Centre des Lasers Intenses et Applications, UMR 5107 du CNRS-CEA-Universite de Bordeaux 1, 351 Cours de la Liberation, F-33405 Talence (France)

2005-05-15T23:59:59.000Z

123

Electrical power distribution control methods, electrical energy demand monitoring methods, and power management devices  

DOE Patents (OSTI)

Electrical power distribution control methods, electrical energy demand monitoring methods, and power management devices are described. In one aspect, an electrical power distribution control method includes providing electrical energy from an electrical power distribution system, applying the electrical energy to a load, providing a plurality of different values for a threshold at a plurality of moments in time and corresponding to an electrical characteristic of the electrical energy, and adjusting an amount of the electrical energy applied to the load responsive to an electrical characteristic of the electrical energy triggering one of the values of the threshold at the respective moment in time.

Chassin, David P. (Pasco, WA); Donnelly, Matthew K. (Kennewick, WA); Dagle, Jeffery E. (Richland, WA)

2006-12-12T23:59:59.000Z

124

Electrical power distribution control methods, electrical energy demand monitoring methods, and power management devices  

DOE Patents (OSTI)

Electrical power distribution control methods, electrical energy demand monitoring methods, and power management devices are described. In one aspect, an electrical power distribution control method includes providing electrical energy from an electrical power distribution system, applying the electrical energy to a load, providing a plurality of different values for a threshold at a plurality of moments in time and corresponding to an electrical characteristic of the electrical energy, and adjusting an amount of the electrical energy applied to the load responsive to an electrical characteristic of the electrical energy triggering one of the values of the threshold at the respective moment in time.

Chassin, David P. (Pasco, WA); Donnelly, Matthew K. (Kennewick, WA); Dagle, Jeffery E. (Richland, WA)

2011-12-06T23:59:59.000Z

125

The FY 2007 Budget Request - On the Threshold of Incredible Advances  

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

7 Budget Request 7 Budget Request On the Threshold of Incredible Advances Douglas L. Faulkner Acting Assistant Secretary Office of Energy Efficiency and Renewable Energy February 2006 2 President's State of the Union Address Keeping America competitive requires affordable energy. And here we have a serious problem: America is addicted to oil, which is often imported from unstable parts of the world. The best way to break this addiction is through technology.... and we are on the threshold of incredible advances... So tonight I announce...push for breakthroughs in two vital areas...change how we power our homes and offices,...change how we power our automobiles. On the Threshold of Incredible Advances 3 Change How We Power Our Automobiles * President's Biofuels Initiative * President's Hydrogen Fuel Initiative

126

Question: What is the cost threshold for providing cost detail for subrecipient  

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

Question: What is the cost threshold for providing cost detail for subrecipients or consultant Question: What is the cost threshold for providing cost detail for subrecipients or consultant information? Is there a cost threshold set for third parties? Answer: Each subawardee/subrecipient/subcontractor whose work is expected to exceed $650,000 or 50% of the total work effort (whichever is less) should complete a Budget Justification package to include the SF 424A budget form, Budget Justification Guideline Excel document, and a narrative supporting the Budget Justification Guidelines. This information may be saved as a separate file or included with the Prime Applicant's Budget.pdf file. Summary level information for subawardees is not sufficient. Detailed explanations and supporting

127

Magnetic Fluctuation Power Near Proton Temperature Anisotropy Instability Thresholds in the Solar Wind  

Science Conference Proceedings (OSTI)

The proton temperature anisotropy in the solar wind is known to be constrained by the theoretical thresholds for pressure-anisotropy-driven instabilities. Here, we use approximately 1x10{sup 6} independent measurements of gyroscale magnetic fluctuations in the solar wind to show for the first time that these fluctuations are enhanced along the temperature anisotropy thresholds of the mirror, proton oblique firehose, and ion cyclotron instabilities. In addition, the measured magnetic compressibility is enhanced at high plasma beta (beta{sub ||} > or approx. 1) along the mirror instability threshold but small elsewhere, consistent with expectations of the mirror mode. We also show that the short wavelength magnetic fluctuation power is a strong function of collisionality, which relaxes the temperature anisotropy away from the instability conditions and reduces correspondingly the fluctuation power.

Bale, S. D. [Physics Department and Space Sciences Laboratory, University of California, Berkeley, California (United States); Kasper, J. C. [Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts (United States); Howes, G. G. [Department of Physics and Astronomy, University of Iowa, Iowa City, Iowa (United States); Quataert, E. [Physics Department and Astronomy Department, University of California, Berkeley, California (United States); Salem, C.; Sundkvist, D. [Space Sciences Laboratory, University of California, Berkeley, California (United States)

2009-11-20T23:59:59.000Z

128

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

E-Print Network (OSTI)

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

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

2009-01-01T23:59:59.000Z

129

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

E-Print Network (OSTI)

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

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

2009-07-10T23:59:59.000Z

130

Experimental Determination of Damage Threshold Characteristics of IR Compatible Optical Materials  

SciTech Connect

The accelerating gradient in a laser-driven dielectric accelerating structure is often limited by the laser damage threshold of the structure. For a given laser-driven dielectric accelerator design, we can maximize the accelerating gradient by choosing the best combination of the accelerator's constituent material and operating wavelength. We present here a model of the damage mechanism from ultrafast infrared pulses and compare that model with experimental measurements of the damage threshold of bulk silicon. Additionally, we present experimental measurements of a variety of candidate materials, thin films, and nanofabricated accelerating structures.

Soong, Ken

2011-05-20T23:59:59.000Z

131

P-wave contribution to third-order top-quark pair production near threshold  

E-Print Network (OSTI)

The next-to-leading order (NLO) P-wave Coulomb Green function contributes at third-order to top-pair production in e+ e- collisions near threshold. In this paper we compute the NLO P-wave Green function in dimensional regularization, as required for a consistent combination with non-resonant production of the W+ W- b\\bar{b} final state, and present a phenomenological analysis of the P-wave contribution. We further briefly discuss squark production near threshold and top-pair production in gamma gamma collisions, where no S-wave contribution is present, and the P-wave thus constitutes the dominant production process.

M. Beneke; J. Piclum; T. Rauh

2013-12-17T23:59:59.000Z

132

Effect of magnetic boundary conditions on the dynamo threshold of von Karman swirling flows  

E-Print Network (OSTI)

We study the effect of different boundary conditions on the kinematic dynamo threshold of von Karman type swirling flows in a cylindrical geometry. Using an analytical test flow, we model different boundary conditions: insulating walls all over the flow, effect of sodium at rest on the cylinder side boundary, effect of sodium behind the impellers, effect of impellers or side wall made of a high-magnetic-permeability material. We find that using high-magnetic-permeability boundary conditions decreases the dynamo threshold, the minimum being achieved when they are implemented all over the flow.

Christophe Gissinger; Alexei Iskakov; Stephan Fauve; Emmanuel Dormy

2008-04-11T23:59:59.000Z

133

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

E-Print Network (OSTI)

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

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

2009-02-27T23:59:59.000Z

134

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

E-Print Network (OSTI)

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

Katzgraber, Helmut G; Martín-Delgado, M A

2009-01-01T23:59:59.000Z

135

Threshold vibrational excitation of CO{sub 2} by slow electrons  

DOE Green Energy (OSTI)

Threshold structures, reminiscent of those seen in the polar hydrogen halides, have recently been observed in the cross sections for electron impact excitation of certain vibrational levels of the non-polar CO2 molecule. These structures occur at energies outside the range where shape resonances dominate the dynamics. We propose a virtual state model that describes the multi-dimensional nuclear dynamics during the collision and explains quantitatively the selectivity observed in the excitation of the Fermi dyad, as well as the pattern of threshold peaks and oscillations seen in the upper levels of the higher polyads.

Vanroose, Wim; Zhang, Zhiyong; McCurdy, C.W.; Rescigno, T.N.

2003-07-08T23:59:59.000Z

136

Energy-momentum uncertainties as possible origin of threshold anomalies in UHECR and TeV-gamma ray events  

E-Print Network (OSTI)

A threshold anomaly refers to a theoretically expected energy threshold that is not observed experimentally. Here we offer an explanation of the threshold anomalies encountered in the ultra-high energy cosmic ray events and the TeV-gamma ray events, by arguing that energy-momentum uncertainties due to quantum gravity, too small to be detected in low-energy regime, can affect particle kinematics so as to raise or even eliminate the energy thresholds. A possible modification of the energy-momentum dispersion relation, giving rise to time-of-flight differences between photons of different energies from gamma ray bursts, is also discussed.

Y. Jack Ng; D. -S. Lee; M. C. Oh; H. van Dam

2000-10-15T23:59:59.000Z

137

Study of the $?p$ Interaction Close to the $?^+n$ and $?^0p$ Thresholds  

E-Print Network (OSTI)

The $\\Lambda p$ interaction close to the $\\Sigma N$ threshold is considered. Specifically, the pronounced structure seen in production reactions like $K^-d \\to \\pi^- \\Lambda p$ and $pp\\to K^+ \\Lambda p$ around the $\\Sigma N$ threshold is analyzed. Modern interaction models of the coupled $\\Lambda N - \\Sigma N$ systems generate such a structure either due to the presence of a (deuteron-like) unstable bound state or of an inelastic virtual state. % A determination of the position of the prominent peak as observed in various experiments for the two aforementioned reactions leads to values that agree quite well with each other. Furthermore, the deduced mean value of $2128.7\\pm 0.3$ MeV for the peak position coincides practically with the threshold energy of the $\\Sigma^+ n$ channel. This supports the interpretation of the structure as a genuine cusp, signaling an inelastic virtual state in the $^3S_1-^3D_1$ partial wave of the $\\Sigma N$ isospin 1/2 channel. % There is also evidence for a second peak (or shoulder) in the data sets considered which appears at roughly 10-15 MeV above the $\\Sigma N$ threshold. However, its concrete position varies significantly from data set to data set and, thus, a theoretical interpretation is difficult.

H. Machner; J. Haidenbauer; F. Hinterberger; A. Magiera; J. A. Niskanen; J. Ritman; R. Siudak

2013-01-25T23:59:59.000Z

138

PUBLISHED ONLINE: 31 MAY 2009 | DOI: 10.1038/NPHYS1300 Experimental onset threshold and magnetic  

E-Print Network (OSTI)

current channels (flux ropes) driven by magnetohydrodynamic (MHD) attraction and a 3D plasma-current-driven instability. Antiparallel magnetic field lines carried by these colliding flux ropes annihilate and drive an electric field. The inflow soon exceeds a threshold for the formation of a reconnection current layer

Loss, Daniel

139

Automatic classification of auditory brainstem responses using SVM-based feature selection algorithm for threshold detection  

Science Conference Proceedings (OSTI)

This paper presents a novel system for automatic recognition of auditory brainstem responses (ABR) to detect hearing threshold. ABR is an important potential signal for determining objective audiograms. Its detection is usually performed by medical experts ... Keywords: Auditory evoked potentials, Feature selection, Support vector machines

Nurettin Ac?r; Özcan Özdamar; Cüneyt Güzeli?

2006-03-01T23:59:59.000Z

140

Underwater temporary threshold shift in pinnipeds: Effects of noise level and duration  

E-Print Network (OSTI)

Underwater temporary threshold shift in pinnipeds: Effects of noise level and duration David Kastak psychophysical techniques were used to evaluate the residual effects of underwater noise on the hearing , amplified Realis- tic MPA-20 , and projected from one of two underwater transducers NUWC J-9 or Lubell

Reichmuth, Colleen

Note: This page contains sample records for the topic "bispectral threshold method" 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

Underwater temporary threshold shift induced by octave-band noise in three species of pinniped  

E-Print Network (OSTI)

Underwater temporary threshold shift induced by octave-band noise in three species of pinniped at center frequency . Each subject was trained to dive into a noise field and remain stationed underwater airborne. When human divers were tested underwater, for instance, the resultant levels of TTS were much

Reichmuth, Colleen

142

Effects of Vibrator Types and Their Placement on Bone?Conduction Threshold Measurements  

Science Conference Proceedings (OSTI)

Monaural bone?conduction threshold measurements in the quiet were obtained for 10 normally hearing young adults at both forehead and mastoid positions using two hearing?aid?type vibrators of different manufacture. Physical calibration data for the vibrators were obtained by other laboratories

Peter B. Weston; Roy W. Gengel; Ira J. Hirsh

1966-01-01T23:59:59.000Z

143

On the Relative Performance of Linear vs. Piecewise-Linear-Threshold Intertemporal Incentives  

Science Conference Proceedings (OSTI)

This paper employs numerical simulations to compare the relative performance of linear contracts with piecewise-linear-threshold contracts in the case where the agent chooses actions over time. These contracts are restricted to be functions of the ending ... Keywords: dynamic programming, intertemporal incentives, linear contracts, salesforce compensation

Joseph Y. Chen; Bruce L. Miller

2009-10-01T23:59:59.000Z

144

A CMOS threshold voltage reference source for very-low-voltage applications  

Science Conference Proceedings (OSTI)

This paper describes a CMOS voltage reference that makes use of weak inversion CMOS transistors and linear resistors, without the need for bipolar transistors. Its operation is analogous to the bandgap reference voltage, but the reference voltage is ... Keywords: Threshold voltage, Ultra-low-power, Very-low-voltage, Voltage reference

Luis H. C. Ferreira; Tales C. Pimenta; Robson L. Moreno

2008-12-01T23:59:59.000Z

145

Novel universal threshold logic gate based on RTD and its application  

Science Conference Proceedings (OSTI)

Resonant tunneling diodes (RTDs) are receiving much attention because of their high-speed switching capability and functional versatility. Due to the negative differential resistance exhibited by RTDs, great functionality with a single gate can be achieved. ... Keywords: Monostable-bistable logic element (MOBILE), Resonant tunneling diode (RTD), Spectral technology, Threshold logic

Yi Wei; Jizhong Shen

2011-06-01T23:59:59.000Z

146

Yukawa Coupling Thresholds: Application to the MSSM and the Minimal Supersymmetric SU(5) GUT  

E-Print Network (OSTI)

We consider a particular class of threshold corrections to Yukawa couplings and mass relations in the MSSM and supersymmetric grand unified models. We give a complete treatment of Yukawa coupling thresholds at the unification scale $\\Mx$ and the effective supersymmetry scale $\\Ms$ and apply them to corrections to the tree-level prediction $y_b(\\Mx) = y_{\\tau}(\\Mx)$ in minimal supersymmetric SU(5). We apply both gauge and Yukawa coupling thresholds to gauge unification and the above Yukawa unification condition to find predictions for the top quark mass, $M_t$, the superheavy vector boson mass $\\Mv$ and the colored Higgs triplet mass $\\Mhs$. We discuss the dependencies of $\\Mx$ and $\\Mhs$ on $\\alpha_s(M_Z)$, $M_t$ and the sparticle spectrum as well as those of $M_t$ on $\\tan\\beta$, $\\alpha_s(M_Z)$ and the bottom quark mass, $M_b$. The effect of the Yukawa coupling thresholds on $M_t$ are given for representative sparticle spectra. We describe the quantitative differences between these effects for low and high $\\tan\\beta$. We also give new bounds on superheavy masses, incorporating proton decay as well as unification constraints, the former leading to a lower bound on $\\alpha_s$.

Brian D. Wright

1994-04-05T23:59:59.000Z

147

Multiresonant Spectroscopy and the High-Resolution Threshold Photoionization of Combustion Free Radicals  

Science Conference Proceedings (OSTI)

This report describes the results of a program of research on the thermochemistry, spectroscopy and intramolecular relaxation dynamics of the combustion intermediate, HCO. We prepare this radical from acetaldehyde as a photo-precursor in a differentially pumped laser-ionization source quadrupole mass spectrometer. Using a multiresonant spectroscopic technique established in our laboratory, we select individual rotational states and overcome Franck-Condon barriers associated with neutral-to-cation geometry changes to promote transitions to individual autoionizing series and state-resolved ionization thresholds. Systematic analysis of rotational structure and associated lineshapes provide experimental insight on autoionization dynamics as input for theoretical modeling. Extrapolation of series, combined with direct threshold-photoelectron detection, yield precise ionization potentials that constitute an important contribution to the thermochemical base of information on HCO.

Edward R. Grant

2005-09-07T23:59:59.000Z

148

Longitudinal Single-Bunch Instability in the ILC Damping Rings: Estimate of Current Threshold  

SciTech Connect

Characterization of single-bunch instabilities in the International Linear Collider (ILC) damping rings (DRs) has been indicated as a high-priority activity toward completion of an engineering design. In this paper we report on a first estimate ofthe current thresholds for the instability using numerical and analytical models of the wake potentials associated with the various machine components. The numerical models were derived (upon appropriate scaling) from designs of the correspondingcomponents installed in existing machines. The current thresholds for instabilities were determined by numerical solution of the Vlasov equation for the longitudinal dynamics. For the DR baseline lattice as of Feb. 2007 we find the critical current forinstability to be safely above the design specifications leaving room for further optimization of the choice of the momentum compaction.

Venturini, Marco; Venturini, Marco

2008-06-25T23:59:59.000Z

149

Development of high damage threshold optics for petawatt-class short-pulse lasers  

Science Conference Proceedings (OSTI)

The authors report laser-induced damage threshold measurements on pure and multilayer dielectrics and gold-coated optics at 1053 and 526 nm for pulse durations, {tau}, ranging from 140 fs to 1 ns. Damage thresholds of gold coatings are limited to 500 mJ/cm{sup 2} in the subpicosecond range for 1053-nm pulses. In dielectrics, qualitative differences in the morphology of damage and a departure from the diffusion-dominated {tau}1/2 scaling indicate that damage results from plasma formation and ablation for {tau}{le}10 ps and from conventional melting and boiling for {tau}>50 ps. A theoretical model based on electron production via multiphoton ionization, Joule heating, and collisional (avalanche) ionization is in quantitative agreement with both the pulsewidth and wavelength scaling of experimental results.

Stuart, B.C.; Perry, M.D.; Boyd, R.D. [and others

1995-02-22T23:59:59.000Z

150

Remarks on double Higgs boson production by gluon fusion at threshold  

E-Print Network (OSTI)

The amplitude of double Higgs boson production by the gluon fusion, $gg \\to hh$, is known to be small due to cancellation between the graphs with the boson trilinear coupling and those with the coupling to the top quark. For this reason a study of this process was suggested as a sensitive probe of the Higgs sector nonlinearity. We calculate in a closed analytical form this amplitude at the threshold of the two bosons, where the cancellation is the strongest, and discuss the origin of the small value of the amplitude. We also note that the cancellation in the double boson production is in fact a part of a more general phenomenon of suppression of similar threshold amplitudes for multiple boson production, which, although not directly relevant to the actual top quark and the Higgs boson, can be useful in other studies.

Xin Li; M. B. Voloshin

2013-11-20T23:59:59.000Z

151

Nonsequential double ionization below laser-intensity threshold: Anticorrelation of electrons without excitation of parent ion  

SciTech Connect

Two-electron correlated spectra of nonsequential double ionization below laser-intensity threshold are known to exhibit back-to-back scattering of the electrons, i.e., the anticorrelation of the electrons. Currently, the widely accepted interpretation of the anticorrelation is recollision-induced excitation of the ion plus subsequent field ionization of the second electron. We argue that another mechanism, namely, simultaneous electron emission, when the time of return of the rescattered electron is equal to the time of liberation of the bounded electron (i.e., the ion has no time for excitation), can also explain the anticorrelation of the electrons in the deep, below laser-intensity threshold regime. Our conclusion is based on the results of the numerical solution of the time-dependent Schroedinger equation for a model system of two one-dimensional electrons, as well as on an adiabatic analytic model that allows for a closed-form solution.

Bondar, D. I. [University of Waterloo, Waterloo, Ontario N2L 3G1 (Canada); National Research Council of Canada, Ottawa, Ontario K1A 0R6 (Canada); Yudin, G. L. [National Research Council of Canada, Ottawa, Ontario K1A 0R6 (Canada); Universite de Sherbrooke, Sherbrooke, Quebec J1K 2R1 (Canada); Liu, W.-K. [University of Waterloo, Waterloo, Ontario N2L 3G1 (Canada); Ivanov, M. Yu. [Imperial College, London SW7 2BW (United Kingdom); Bandrauk, A. D. [Universite de Sherbrooke, Sherbrooke, Quebec J1K 2R1 (Canada)

2011-01-15T23:59:59.000Z

152

Charge-distribution effect of imaging molecular structure by high-order above-threshold ionization  

SciTech Connect

Using a triatomic molecular model, we show that the interference pattern in the high-order above-threshold ionization (HATI) spectrum depends dramatically on the charge distribution of the molecular ion. Therefore the charge distribution can be considered a crucial factor for imaging a molecular geometric structure. Based on this study, a general destructive interference formula for each above-threshold ionization channel is obtained for a polyatomic molecule concerning the positions and charge values of each nuclei. Comparisons are made for the HATI spectra of CO{sub 2}, O{sub 2}, NO{sub 2}, and N{sub 2}. These results may shed light on imaging complex molecular structure by the HATI spectrum.

Wang Bingbing; Fu Panming [Laboratory of Optical Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080 (China); Guo Yingchun [Department of Physics, State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062 (China); Zhang Bin; Zhao Zengxiu [Department of Physics, National University of Defense Technology, Changsha 410073 (China); Yan Zongchao [Department of Physics, University of New Brunswick, Fredericton, New Brunswick E3B 5A3 (Canada)

2010-10-15T23:59:59.000Z

153

Distant perturbation asymptotics in window-coupled waveguides. I. The non-threshold case  

E-Print Network (OSTI)

We consider a pair of adjacent quantum waveguides, in general of different widths, coupled laterally by a pair of windows in the common boundary, not necessarily of the same length, at a fixed distance. The Hamiltonian is the respective Dirichlet Laplacian. We analyze the asymptotic behavior of the discrete spectrum as the window distance tends to infinity for the generic case, i.e. for eigenvalues of the corresponding one-window problems separated from the threshold.

D. Borisov; P. Exner

2006-06-07T23:59:59.000Z

154

Intensity-dependent enhancements in high-order above-threshold ionization  

Science Conference Proceedings (OSTI)

The very pronounced intensity-dependent enhancements of groups of peaks of high-order above-threshold-ionization spectra of rare-gas atoms are investigated using an improved version of the strong-field approximation, which realistically models the respective atom. Two types of enhancements are found and explained in terms of constructive interference of the contributions of a large number of long quantum orbits. The first type is observed for intensities slightly below channel closings. Its intensity dependence is comparatively smooth and it is generated by comparatively few (of the order of 20) orbits. The second type occurs precisely at channel closings and exhibits an extremely sharp intensity dependence. It requires constructive interference of a very large number of long orbits (several hundreds) and generates cusps in the electron spectrum at integer multiples of the laser-photon energy. An interpretation of these enhancements as a threshold phenomenon is also given. An interplay of different types of the threshold anomalies is observed. The position of both types of enhancements, in the photoelectron-energy--laser-intensity plane, shifts to the next channel closing intensity with the change of the ground-state parity. The enhancements gradually disappear with decreasing laser pulse duration. This confirms the interpretation of enhancements as a consequence of the interference of long strong-laser-field-induced quantum orbits.

Milosevic, D. B. [Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, 71000 Sarajevo (Bosnia and Herzegowina); Max-Born-Institut, Max-Born-Strasse 2a, 12489 Berlin (Germany); Hasovic, E.; Gazibegovic-Busuladzic, A. [Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, 71000 Sarajevo, Bosnia and Herzegovina (Bosnia and Herzegowina); Busuladzic, M. [Medical Faculty, University of Sarajevo, Cekalusa 90, 71000 Sarajevo (Bosnia and Herzegowina); Becker, W. [Max-Born-Institut, Max-Born-Strasse 2a, 12489 Berlin (Germany)

2007-11-15T23:59:59.000Z

155

A Low-threshold Analysis of CDMS Shallow-site Data  

SciTech Connect

Data taken during the final shallow-site run of the first tower of the Cryogenic Dark Matter Search (CDMS II) detectors have been reanalyzed with improved sensitivity to small energy depositions. Four {approx}224 g germanium and two {approx}105 g silicon detectors were operated at the Stanford Underground Facility (SUF) between December 2001 and June 2002, yielding 118 live days of raw exposure. Three of the germanium and both silicon detectors were analyzed with a new low-threshold technique, making it possible to lower the germanium and silicon analysis thresholds down to the actual trigger thresholds of {approx}1 and {approx}2 keV, respectively. Limits on the spin-independent cross section for weakly interacting massive particles (WIMPs) to elastically scatter from nuclei based on these data exclude interesting parameter space for WIMPs with masses below 9 GeV/c{sup 2}. Under standard halo assumptions, these data partially exclude parameter space favored by interpretations of the DAMA/LIBRA and CoGeNT experiments data as WIMP signals, and exclude new parameter space for WIMP masses between 3 and 4 GeV/c{sup 2}.

Akerib, D.S.; /Case Western Reserve U.; Attisha, M.J.; /Brown U.; Baudis, L.; /Zurich-Irchel U.; Bauer, D.A.; /Fermilab; Bolozdynya, A.I.; /Case Western Reserve U.; Brink, P.L.; /SLAC; Bunker, R.; /UC, Santa Barbara; Cabrera, B.; /Stanford U., Phys. Dept.; Caldwell, D.O.; /UC, Santa Barbara; Chang, C.L.; /Stanford U., Phys. Dept.; Clarke, R.M.; /Stanford U., Phys. Dept.; Cooley, J.; /Southern Methodist U.; Crisler, M.B.; /Fermilab; Cushman, P.; /Minnesota U.; DeJongh, F.; /Fermilab; Dixon, R.; /Fermilab; Driscoll, D.D.; /Case Western Reserve U.; Filippini, J.; /Caltech; Funkhouser, S.; /UC, Berkeley; Gaitskell, R.J.; /Brown U.; Golwala, S.R.; /Caltech /Fermilab /Fermilab /Colorado U., Denver /Case Western Reserve U. /Texas A-M /Minnesota U. /UC, Berkeley /UC, Berkeley /Caltech /Stanford U., Phys. Dept. /UC, Santa Barbara /Stanford U., Phys. Dept. /Minnesota U. /Queen's U., Kingston /Minnesota U. /St. Olaf Coll. /Florida U. /LBL, Berkeley /UC, Berkeley /Texas A-M /UC, Santa Barbara /Syracuse U. /UC, Berkeley /Princeton U. /Case Western Reserve U. /Stanford U., Phys. Dept. /UC, Santa Barbara /Fermilab /Santa Clara U.

2012-06-04T23:59:59.000Z

156

A low-threshold analysis of CDMS shallow-site data  

SciTech Connect

Data taken during the final shallow-site run of the first tower of the Cryogenic Dark Matter Search (CDMS II) detectors have been reanalyzed with improved sensitivity to small energy depositions. Four {approx}224 g germanium and two {approx}105 g silicon detectors were operated at the Stanford Underground Facility (SUF) between December 2001 and June 2002, yielding 118 live days of raw exposure. Three of the germanium and both silicon detectors were analyzed with a new low-threshold technique, making it possible to lower the germanium and silicon analysis thresholds down to the actual trigger thresholds of {approx}1 keV and {approx}2 keV, respectively. Limits on the spin-independent cross section for weakly interacting massive particles (WIMPs) to elastically scatter from nuclei based on these data exclude interesting parameter space for WIMPs with masses below 9 GeV/c{sup 2}. Under standard halo assumptions, these data partially exclude parameter space favored by interpretations of the DAMA/LIBRA and CoGeNT experiments data as WIMP signals, and exclude new parameter space for WIMP masses between 3 GeV/c{sup 2} and 4 GeV/c{sup 2}.

Akerib, D.S.; /Case Western Reserve U.; Attisha, M.J.; /Brown U.; Baudis, L.; /Zurich-Irchel U.; Bauer, D.A.; /Fermilab; Bolozdynya, A.I.; /Case Western Reserve U.; Brink, P.L.; /SLAC; Bunker, R.; /UC, Santa Barbara; Cabrera, B.; /Stanford U., Phys. Dept.; Caldwell, D.O.; /UC, Santa Barbara; Chang, C.L.; /Stanford U., Phys. Dept.; Clarke, R.M.; /Stanford U., Phys. Dept. /Southern Methodist U.

2010-10-01T23:59:59.000Z

157

ARM - VAP Process - visst  

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

Productsvisst Productsvisst Documentation & Plots visst : XDC documentation Data Management Facility Plots (Quick Looks) ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send VAP : Minnis Cloud Products Using Visst Algorithm (VISST) Instrument Categories Cloud Properties, Satellite Observations General Overview Satellite based retrievals of cloud and radiation properties are available in this value-added product provided by Pat Minnis' group at NASA/Langley using the VISST (Visible Infrared Solar-Infrared Split Window Technique) algorithm. These datastreams are both pixel-level (4-km) retrievals and averages on a 0.3 or 0.5 degree latitude-longitude grid and replace earlier satellite-based retrievals on the Layered Bispectral Threshold Method

158

Cloud Microphysical and Radiative Properties Derived from MODIS, VIRS, AVHRR, and GMS Data Over the Tropical Western Pacific  

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

Microphysical and Radiative Properties Derived Microphysical and Radiative Properties Derived from MODIS, VIRS, AVHRR, and GMS Data Over the Tropical Western Pacific G. D. Nowicki, M. L. Nordeen, P. W. Heck, D. R. Doelling, and M. M. Khaiyer Analytical Services and Materials, Inc. Hampton, Virginia P. Minnis National Aeronautics and Space Administration Atmospheric Sciences Division Langley Research Center Hampton, Virginia S. Sun-Mack Science Applications International Corporation Hampton, Virginia Introduction Utilization of the geostationary meteorological satellite (GMS) imagery has allowed for the derivation of cloud and radiative properties over the Tropical Western Pacific (TWP) on relatively high spatial and temporal scales. The layered bispectral threshold method (LBTM) has been applied to GMS data

159

Comparison of Pyranometric and Pyrheliometric Methods for the Determination of Sunshine Duration  

Science Conference Proceedings (OSTI)

Two pyranometric methods for the determination of sunshine duration (SD) from global irradiance measurements are evaluated by means of summated sunshine seconds derived from pyrheliometric measurements in combination with the WMO threshold of 120 ...

Yvonne B. L. Hinssen; Wouter H. Knap

2007-05-01T23:59:59.000Z

160

Cryogenic ion implantation near amorphization threshold dose for halo/extension junction improvement in sub-30 nm device technologies  

SciTech Connect

We report on junction advantages of cryogenic ion implantation with medium current implanters. We propose a methodical approach on maximizing cryogenic effects on junction characteristics near the amorphization threshold doses that are typically used for halo implants for sub-30 nm technologies. BF{sub 2}{sup +} implant at a dose of 8 Multiplication-Sign 10{sup 13}cm{sup -2} does not amorphize silicon at room temperature. When implanted at -100 Degree-Sign C, it forms a 30 - 35 nm thick amorphous layer. The cryogenic BF{sub 2}{sup +} implant significantly reduces the depth of the boron distribution, both as-implanted and after anneals, which improves short channel rolloff characteristics. It also creates a shallower n{sup +}-p junction by steepening profiles of arsenic that is subsequently implanted in the surface region. We demonstrate effects of implant sequences, germanium preamorphization, indium and carbon co-implants for extension/halo process integration. When applied to sequences such as Ge+As+C+In+BF{sub 2}{sup +}, the cryogenic implants at -100 Degree-Sign C enable removal of Ge preamorphization, and form more active n{sup +}-p junctions and steeper B and In halo profiles than sequences at room temperature.

Park, Hugh; Todorov, Stan; Colombeau, Benjamin; Rodier, Dennis; Kouzminov, Dimitry; Zou Wei; Guo Baonian; Khasgiwale, Niranjan; Decker-Lucke, Kurt [Applied Materials, Varian Semiconductor Equipment, 35 Dory Road, Gloucester, Massachusetts 01930 (United States)

2012-11-06T23:59:59.000Z

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161

Analytical soft error models accounting for die-to-die and within-die variations in sub-threshold SRAM cells  

Science Conference Proceedings (OSTI)

Sub-threshold SRAM cells are attractive because of their low leakage power and low access energy. However, the susceptibility of sub-threshold SRAM cells to soft errors is high due to their low supply voltage, high density, and shrinking geometry. Moreover, ... Keywords: circuit modeling and optimization, critical charge, process variation, soft error rate (SER), sub-threshold SRAM

Hassan Mostafa; Mohab H. Anis; Mohamed Elmasry

2011-02-01T23:59:59.000Z

162

Measurement and modeling of infrared nonlinear absorption coefficients and laser-induced damage thresholds in Ge and GaSb  

SciTech Connect

Using a simultaneous fitting technique to extract nonlinear absorption coefficients from data at two pulse widths, we measure two-photon and free-carrier absorption coefficients for Ge and GaSb at 2.05 and 2.5 {mu}m for the first time, to our knowledge. Results agreed well with published theory. Single-shot damage thresholds were also measured at 2.5 {mu}m and agreed well with modeled thresholds using experimentally determined parameters including nonlinear absorption coefficients and temperature dependent linear absorption. The damage threshold for a single-layer Al{sub 2}O{sub 3} anti-reflective coating on Ge was 55% or 35% lower than the uncoated threshold for picosecond or nanosecond pulses, respectively.

Wagner, T. J.; Bohn, M. J.; Coutu, R. A. Jr. [Air Force Institute of Technology, Wright Patterson Air Force Base, Ohio 45433 (United States); Gonzalez, L. P.; Murray, J. M.; Guha, S. [Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright Patterson Air Force Base, Ohio 45433 (United States); Schepler, K. L. [Air Force Research Laboratory, Sensors Directorate, Wright Patterson Air Force Base, Ohio 45433 (United States)

2010-10-15T23:59:59.000Z

163

H-mode threshold power scaling and the {gradient}B drift effect  

Science Conference Proceedings (OSTI)

One of the largest influences on the H-mode power threshold (P{sub TH}) is the direction of the ion {gradient}B drift relative to the X-point location, where factors of 2--3 increase in P{sub TH} are observed for the ion {gradient}B drift away from the X-point. It is proposed that the threshold power scaling observed in single-null configurations with the ion {gradient}B drift toward the X-point location (P{sub TH} {approximately} nB, where n is the plasma density, and B is the toroidal field) is due to the scaling of the magnitude of the {gradient}B drift effect. Hinton and later Hinton and Stebler have modeled this effect as neoclassical cross field fluxes of both heat and particles driven by poloidal temperature gradients on the open field lines in the scrape-off layer (SOL). The {gradient}B drift effect influences the power threshold by affecting the edge conditions needed for the L-H transition. It is not essential for the L-H transition itself since transitions are observed with either direction of B. Predictions of this model include saturation of the B scaling of P{sub TH} at high field, 1/B scaling of P{sub TH} with reverse B, and no B scaling of P{sub TH} in balanced double-null configurations. This last prediction is consistent with the observed scaling of p{sub TH} in double-null plasma sin DIII-D.

Carlstrom, T.N.; Burrell, K.H.; Groebner, R.J.; Staebler, G.M.

1997-06-01T23:59:59.000Z

164

H-Mode Turbulence, Power Threshold, ELM, and Pedestal Studies in NSTX  

SciTech Connect

High-confinement mode (H-mode) operation plays a crucial role in NSTX [National Spherical Torus Experiment] research, allowing higher beta limits due to reduced plasma pressure peaking, and long-pulse operation due to high bootstrap current fraction. Here, new results are presented in the areas of edge localized modes (ELMs), H-mode pedestal physics, L-H turbulence, and power threshold studies. ELMs of several other types (as observed in conventional aspect ratio tokamaks) are often observed: (1) large, Type I ELMs, (2) ''medium'' Type II/III ELMs, and (3) giant ELMs which can reduce stored energy by up to 30% in certain conditions. In addition, many high-performance discharges in NSTX have tiny ELMs (newly termed Type V), which have some differences as compared with ELM types in the published literature. The H-mode pedestal typically contains between 25-33% of the total stored energy, and the NSTX pedestal energy agrees reasonably well with a recent international multi-machine scaling. We find that the L-H transition occurs on a {approx}100 {micro}sec timescale as viewed by a gas puff imaging diagnostic, and that intermittent quiescent periods precede the final transition. A power threshold identity experiment between NSTX and MAST shows comparable loss power at the L-H transition in balanced double-null discharges. Both machines require more power for the L-H transition as the balance is shifted toward lower single null. High field side gas fueling enables more reliable H-mode access, but does not always lead to a lower power threshold e.g., with a reduction of the duration of early heating. Finally the edge plasma parameters just before the L-H transition were compared with theories of the transition. It was found that while some theories can separate well-developed L- and H-mode data, they have little predictive value.

R. Maingi; C.E. Bush; E.D. Fredrickson; D.A. Gates; S.M. Kaye; B.P. LeBlanc; J.E. Menard; H. Meyer; D. Mueller; N. Nishino; A.L. Roquemore; S.A. Sabbagh; K. Tritz; S.J. Zweben; M.G. Bell; R.E. Bell; T. Biewer; J.A. Boedo; D.W. Johnson; R. Kaita; H.W. Kugel; R.J. Maqueda; T. Munsat; R. Raman; V.A. Soukhanovskii; T. Stevenson; D. Stutman

2004-10-28T23:59:59.000Z

165

Essays on price dynamics, discovery, and dynamic threshold effects among energy spot markets in North America  

E-Print Network (OSTI)

Given the role electricity and natural gas sectors play in the North American economy, an understanding of how markets for these commodities interact is important. This dissertation independently characterizes the price dynamics of major electricity and natural gas spot markets in North America by combining directed acyclic graphs with time series analyses. Furthermore, the dissertation explores a generalization of price difference bands associated with the law of one price. Interdependencies among 11 major electricity spot markets are examined in Chapter II using a vector autoregression model. Results suggest that the relationships between the markets vary by time. Western markets are separated from the eastern markets and the Electricity Reliability Council of Texas. At longer time horizons these separations disappear. Palo Verde is the important spot market in the west for price discovery. Southwest Power Pool is the dominant market in Eastern Interconnected System for price discovery. Interdependencies among eight major natural gas spot markets are investigated using a vector error correction model and the Greedy Equivalence Search Algorithm in Chapter III. Findings suggest that the eight price series are tied together through sixlong-run cointegration relationships, supporting the argument that the natural gas market has developed into a single integrated market in North America since deregulation. Results indicate that price discovery tends to occur in the excess consuming regions and move to the excess producing regions. Across North America, the U.S. Midwest region, represented by the Chicago spot market, is the most important for price discovery. The Ellisburg-Leidy Hub in Pennsylvania and Malin Hub in Oregon are important for eastern and western markets. In Chapter IV, a threshold vector error correction model is applied to the natural gas markets to examine nonlinearities in adjustments to the law of one price. Results show that there are nonlinear adjustments to the law of one price in seven pair-wise markets. Four alternative cases for the law of one price are presented as a theoretical background. A methodology is developed for finding a threshold cointegration model that accounts for seasonality in the threshold levels. Results indicate that dynamic threshold effects vary depending on geographical location and whether the markets are excess producing or excess consuming markets.

Park, Haesun

2005-08-01T23:59:59.000Z

166

Threshold conditions for lasing of a free electron laser oscillator with longitudinal electrostatic wiggler  

Science Conference Proceedings (OSTI)

The system of the nonlinear non-stationary equations describing spatial-temporal dynamics of the amplitudes of an ondulator radiation and a space-charge wave of a relativistic electron beam in the resonator is obtained. A free electron laser resonator with longitudinal electrostatic wiggler is considered. In the linear approximation, the threshold conditions of lasing for Raman and Compton regimes under excitation of forward and backward electromagnetic wave are achieved. In the various physical situations, the variation of the minimum length of the resonator with the amplitude of wiggler, density of electron beam, and with the reflection coefficients of resonator's mirrors is investigated.

Sepehri Javan, N. [Department of Physics, Faculty of Sciences, University of Mohaghegh Ardabili, P.O. Box 179, Ardabil, 56199-11367 (Iran, Islamic Republic of)

2012-12-15T23:59:59.000Z

167

An application of the Threshold Accepting metaheuristic for curriculum based course timetabling  

E-Print Network (OSTI)

The article presents a local search approach for the solution of timetabling problems in general, with a particular implementation for competition track 3 of the International Timetabling Competition 2007 (ITC 2007). The heuristic search procedure is based on Threshold Accepting to overcome local optima. A stochastic neighborhood is proposed and implemented, randomly removing and reassigning events from the current solution. The overall concept has been incrementally obtained from a series of experiments, which we describe in each (sub)section of the paper. In result, we successfully derived a potential candidate solution approach for the finals of track 3 of the ITC 2007.

Geiger, Martin Josef

2008-01-01T23:59:59.000Z

168

Strong-field above-threshold photoemission from sharp metal tips  

E-Print Network (OSTI)

We present energy-resolved measurements of electron emission from sharp metal tips driven with low energy pulses from a few-cycle laser oscillator. We observe above-threshold photoemission with a photon order of up to 9. At a laser intensity of 2*10^11 W/cm^2 suppression of the lowest order peak occurs, indicating the onset of strong-field effects. We also observe peak shifting linearly with intensity with a slope of around -1.8eV / (10^12 W/cm^2). We attribute the magnitude of the laser field effects to field enhancement taking place at the tip's surface.

Markus Schenk; Michael Krüger; Peter Hommelhoff

2010-09-15T23:59:59.000Z

169

High-Energy Threshold Reaction Rates on 0.8 GeV Proton-Irradiated Thick W and W-Na Targets  

E-Print Network (OSTI)

Threshold activation reaction rates in 12C, 19F, 27Al, 59Co, 63Cu, 65Cu, 64Zn, 93Nb, 115In, 169Tm, 181Ta, 197Au, and 209Bi experimental samples placed along the axis inside and outside the 0.8 GeV proton-irradiated 92-cm thick W-Na and 4-cm thick W targets where measured at the ITEP proton synchrotron. 158 reactions of up to +AH4-0.5 GeV thresholds have been measured in 123 activation samples for W-Na target, and 157 reactions in 36 activation samples for W target. The reaction rates were determined using the gamma-spectrometry method. In total, more than 1000 values of activation reactions were determined in the experiments. In both cases the measured reaction rates were compared with the LAHET code simulated rates and using several nuclear databases for the respective excitation functions, namely, ENDF/B6 for cross section of neutrons at energies below 20 MeV and MENDL2 together with MENDL2P for cross sections of protons and neutrons of 20 to 100 MeV energies. A general satisfactory agreement between simulated and experimental data has been found.

Yu. E. Titarenko; V. F. Batyaev; E. I. Karpikhin; V. M. Zhivun; A. B. Koldobsky; R. D. Mulambetov; S. V. Mulambetova; S. L. Zaitsev; S. G. Mashnik; R. E. Prael

2004-01-26T23:59:59.000Z

170

Energy dependence of the pp->K{sup +}nSIGMA{sup +} reaction close to threshold  

SciTech Connect

Production of the SIGMA{sup +} hyperon through the pp->K{sup +}nSIGMA{sup +} reaction has been investigated at four energies close to threshold, 1.826,1.920,1.958, and 2.020 GeV. At low energies, correlated K{sup +}pi{sup +} pairs can only originate from SIGMA{sup +} production so their measurement allows the total cross section for the reaction to be determined. The results obtained are completely consistent with the values extracted from the study of the K{sup +}-proton correlation spectra obtained in the same experiment. These spectra, as well as the inclusive K{sup +} momentum distributions, also provide conservative upper limits on SIGMA{sup +} production rates. The measurements show a SIGMA{sup +} production cross section that varies roughly like phase space, and, in particular, none of the three experimental approaches used supports the anomalously high, near-threshold pp->K{sup +}nSIGMA{sup +} total cross section previously reported [T. Rozek et al., Phys. Lett. B 643, 251 (2006)].

Valdau, Yu.; Mikirtychiants, S. [High Energy Physics Department, Petersburg Nuclear Physics Institute, RU-188350 Gatchina (Russian Federation); Institut fuer Kernphysik and Juelich Centre for Hadron Physics, Forschungszentrum Juelich, D-52425 Juelich (Germany); Barsov, S.; Dzyuba, A.; Koptev, V. [High Energy Physics Department, Petersburg Nuclear Physics Institute, RU-188350 Gatchina (Russian Federation); Buescher, M.; Hartmann, M.; Kacharava, A.; Nekipelov, M.; Ohm, H.; Rathmann, F.; Stroeher, H. [Institut fuer Kernphysik and Juelich Centre for Hadron Physics, Forschungszentrum Juelich, D-52425 Juelich (Germany); Chiladze, D. [Institut fuer Kernphysik and Juelich Centre for Hadron Physics, Forschungszentrum Juelich, D-52425 Juelich (Germany); High Energy Physics Institute, Tbilisi State University, 0186 Tbilisi, Georgia (United States); Dymov, S. [Physikalisches Institut II, Universitaet Erlangen-Nuernberg, D-91058 Erlangen (Germany); Laboratory of Nuclear Problems, JINR, RU-141980 Dubna (Russian Federation); Keshelashvili, I. [High Energy Physics Institute, Tbilisi State University, 0186 Tbilisi, Georgia (United States); Physics Department, University of Basel, Klingelbergstrasse 82, CH-4056 Basel (Switzerland); Khoukaz, A.; Mielke, M.; Papenbrock, M. [Institut fuer Kernphysik, Universitaet Muenster, D-48149 Muenster (Germany); Kulessa, P. [H. Niewodniczanski Institute of Nuclear Physics PAN, PL-31342 Cracow (Poland); Merzliakov, S. [Institut fuer Kernphysik and Juelich Centre for Hadron Physics, Forschungszentrum Juelich, D-52425 Juelich (Germany); Laboratory of Nuclear Problems, JINR, RU-141980 Dubna (Russian Federation)

2010-04-15T23:59:59.000Z

171

Threshold concentrations in zinc-doped lithium niobate crystals and their structural conditionality  

SciTech Connect

On the basis of precise X-ray diffraction study of lithium niobate single crystals of congruent composition and four zinc-doped (at 2.8, 5.2, 7.6, and 8.2 mol %) crystals, structural conditionality of the threshold concentrations of the dopant has been established. At these concentrations, the mechanism of zinc incorporation into crystal changes. As the zinc concentration increases, this element first substitutes excess niobium, localized in lithium positions, with a simultaneous decrease in the number of vacancies in these positions. Then zinc substitutes lithium with formation of new lithium vacancies. When a certain limit on the number of vacancies is reached, zinc begins to substitute niobium in its main positions. This process is naturally accompanied by a decrease in the number of vacancies to their complete disappearance and formation of a self-compensating crystal. The character of the dependence of the crystal physical properties on the dopant concentration changes specifically when the impurity concentration passes through the threshold values.

Chernaya, T. S.; Volk, T. R.; Verin, I. A.; Simonov, V. I., E-mail: simonov@ns.crys.ras.ru [Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation)

2008-07-15T23:59:59.000Z

172

Blister Threshold Based Thermal Limits for the U-Mo Monolithic Fuel System  

Science Conference Proceedings (OSTI)

Fuel failure is most commonly induced in research and test reactor fuel elements by exposure to an under-cooled or over-power condition that results in the fuel temperature exceeding a critical threshold above which blisters form on the plate. These conditions can be triggered by normal operational transients (i.e. temperature overshoots that may occur during reactor startup or power shifts) or mild upset events (e.g., pump coastdown, small blockages, mis-loading of fuel elements into higher-than-planned power positions, etc.). The rise in temperature has a number of general impacts on the state of a fuel plate that include, for example, stress relaxation in the cladding (due to differential thermal expansion), softening of the cladding, increased mobility of fission gases, and increased fission-gas pressure in pores, all of which can encourage the formation of blisters on the fuel-plate surface. These blisters consist of raised regions on the surface of fuel plates that occur when the cladding plastically deforms in response to fission-gas pressure in large pores in the fuel meat and/or mechanical buckling of the cladding over damaged regions in the fuel meat. The blister temperature threshold decreases with irradiation because the mechanical properties of the fuel plate degrade while under irradiation (due to irradiation damage and fission-product accumulation) and because the fission-gas inventory progressively increases (and, thus, so does the gas pressure in pores).

D. M. Wachs; I. Glagolenko; F. J. Rice; A. B. Robinson; B. H. Rabin; M. K. Meyer

2012-10-01T23:59:59.000Z

173

Searching for low-lying multi-particle thresholds in lattice spectroscopy  

E-Print Network (OSTI)

We explore the Euclidean-time tails of odd-parity nucleon correlation functions in a search for the S-wave pion-nucleon scattering-state threshold contribution. The analysis is performed using 2+1 flavor 32^3 x 64 PACS-CS gauge configurations available via the ILDG. Correlation matrices composed with various levels of fermion source/sink smearing are used to project low-lying states. The consideration of 25,600 fermion propagators reveals the presence of more than one state in what would normally be regarded as an eigenstate-projected correlation function. This observation is in accord with the scenario where the eigenstates contain a strong mixing of single and multi-particle states but only the single particle component has a strong coupling to the interpolating field. Employing a two-exponential fit to the eigenvector-projected correlation function, we are able to confirm the presence of two eigenstates. The lower-lying eigenstate is consistent with a N-pi scattering threshold and has a relatively small coupling to the three-quark interpolating field. We discuss the impact of this small scattering-state contamination in the eigenvector projected correlation function on previous results presented in the literature.

M. Selim Mahbub; Waseem Kamleh; Derek B. Leinweber; Anthony G. Williams

2013-10-25T23:59:59.000Z

174

Acquisition and Analysis of Bispectral Bidirectional Reflectance and Reradiation Distribution Functions  

E-Print Network (OSTI)

. Lensch2 1MPI Informatik 2Ulm University 3University College London i o Fluor. yellow Fluorescent red Green spray paint Pink spray paint Dull day-glo red White paper Figure 1: Fluorescent materials absorb]. Fluorescence is represented by the off-diagonal entries. Abstract In fluorescent materials, light from

Kautz, Jan

175

Limitations of Bispectral Infrared Cloud Phase Determination and Potential for Improvement  

Science Conference Proceedings (OSTI)

Determining cloud thermodynamic phase using infrared satellite observations typically requires a priori assumptions about relationships between cloud phase and cloud temperature. In this study, limitations of an approach using two infrared ...

Shaima L. Nasiri; Brian H. Kahn

2008-11-01T23:59:59.000Z

176

Image registration method for medical image sequences  

DOE Patents (OSTI)

Image registration of low contrast image sequences is provided. In one aspect, a desired region of an image is automatically segmented and only the desired region is registered. Active contours and adaptive thresholding of intensity or edge information may be used to segment the desired regions. A transform function is defined to register the segmented region, and sub-pixel information may be determined using one or more interpolation methods.

Gee, Timothy F.; Goddard, James S.

2013-03-26T23:59:59.000Z

177

Above-threshold ionization of diatomic molecules by few-cycle laser pulses  

Science Conference Proceedings (OSTI)

Above-threshold ionization of diatomic molecules by infrared carrier-envelope phase (CEP) stable few-cycle laser pulses is analyzed both experimentally and theoretically. The theoretical approach is based on the recently developed molecular improved strong-field approximation (ISFA), generalized to few-cycle pulses. Instead of using the first Born approximation, the rescattering matrix element in the ISFA is now calculated exactly. This modification leads to the appearance of characteristic minima in the differential cross section as a function of the scattering angle. Experimental angle-resolved photoelectron spectra of N{sub 2} and O{sub 2} molecules are obtained using the velocity map imaging technique. A relatively good agreement of experimental and simulated angle-resolved spectra, CEP-dependent asymmetry maps, and extracted electron-molecular ion elastic scattering differential cross sections is obtained.

Gazibegovic-Busuladzic, A. [Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, 71000 Sarajevo (Bosnia and Herzegowina); Hasovic, E. [Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, 71000 Sarajevo (Bosnia and Herzegowina); Max-Born-Institut, Max-Born-Str. 2a, D-12489 Berlin (Germany); Busuladzic, M. [Medical Faculty, University of Sarajevo, Cekalusa 90, 71000 Sarajevo (Bosnia and Herzegowina); Milosevic, D. B. [Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, 71000 Sarajevo (Bosnia and Herzegowina); Max-Born-Institut, Max-Born-Str. 2a, D-12489 Berlin (Germany); Academy of Sciences and Arts of Bosnia and Herzegovina Bistrik 7, 71000 Sarajevo (Bosnia and Herzegowina); Kelkensberg, F.; Siu, W. K. [FOM-Institute AMOLF, Science park 104, NL-1098 XG Amsterdam (Netherlands); Vrakking, M. J. J. [Max-Born-Institut, Max-Born-Str. 2a, D-12489 Berlin (Germany); FOM-Institute AMOLF, Science park 104, NL-1098 XG Amsterdam (Netherlands); Lepine, F. [Universite Lyon 1 (France); CNRS (France); LASIM, UMR 5579, 43 bvd. du 11 novembre 1918, F-69622 Villeurbanne (France); Sansone, G.; Nisoli, M. [Politecnico di Milano, Department of Physics, National Research Council of Italy, Institute of Photonics and Nanotechnologies (CNR-IFN), Piazza L. da Vinci 32, I-20133, Milano (Italy); Znakovskaya, I. [Max-Planck-Institut fuer Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching (Germany); Kling, M. F. [Max-Planck-Institut fuer Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching (Germany); J.R. Macdonald Laboratory, Kansas State University, Manhattan, Kansas 66506 (United States)

2011-10-15T23:59:59.000Z

178

NNLL threshold resummation for top-pair and single-top production  

E-Print Network (OSTI)

I discuss threshold resummation at NNLL accuracy in the standard moment-space approach in perturbative QCD for top-pair and single-top production. For top quark pair production I present new approximate NNLO results for the total cross section and for the top quark transverse momentum and rapidity distributions at 8 TeV LHC energy. I discuss the accuracy of the soft-gluon approximation and show that the NLO and NNLO approximate results from resummation are practically indistinguishable from exact NLO and partial NNLO results. For single top production I present new approximate NNLO results for the total cross sections in all three channels at the LHC and also for the top quark transverse momentum distributions in t-channel production and in top-quark associated production with a W boson. For both ttbar and single-top production the agreement of theoretical results with LHC and Tevatron data is excellent.

Nikolaos Kidonakis

2012-10-29T23:59:59.000Z

179

{phi}-Meson Photoproduction with Linearly Polarized Photons at Threshold Energies  

SciTech Connect

The observables provided by linearly-polarized photons are of interest in delineating the contributions of the various hadronic processes giving rise to vector meson photoproduction. In particular, we describe how {phi}-meson production affords an incisive tool for exploring the nature of the parity exchange at threshold energies, the strangeness content of proton, as well as extracting signatures for the violation of Okubo-Zweig-Iizuka observation (OZI rule). Our goal is to study the {gamma}-vectorp{yields}{phi}p reaction, with {phi}{yields}K{sup +}K{sup -}, in the photon energy range of 1.7 to 2.1 GeV by using the Coherent Linear Bremsstrahlung Facility in Hall B of Jefferson Laboratory, Newport News, VA. The data were collected during the g8b run in the summer of 2005.

Salamanca, Julian; Cole, Philip L. [Idaho State University, Dept. of Physics, Pocatello, Idaho 83209 (United States)

2007-10-26T23:59:59.000Z

180

Threshold corrections in bottom and charm quark hadroproduction at next-to-next-to-leading order.  

E-Print Network (OSTI)

ar X iv :h ep -p h/ 04 01 05 6v 1 9 Ja n 20 04 Cavendish-HEP-04/01 LBNL-54251 Threshold corrections in bottom and charm quark hadroproduction at next-to-next-to-leading order Nikolaos Kidonakisa and Ramona Vogtb aCavendish Laboratory, University... be either qq or gg. A more detailed discussion of the kinematics can be found in Ref. [2]. In 1PI kinematics, a single heavy quark is identified so that i(pa) + j(pb) ?? Q(p1) +X[Q](p2) (2.1) where Q is the identified bottom or charm quark of mass m and X...

Kidonakis, Nikolaos; Vogt, Ramona

Note: This page contains sample records for the topic "bispectral threshold method" 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

Study of a Threshold Cherenkov Counter Based on Silica Aerogels with Low Refractive Indices ?  

E-Print Network (OSTI)

To identify ? ± and K ± in the region of 1.0 ? 2.5 GeV/c, a threshold Cherenkov counter equipped with silica aerogels has been investigated. Silica aerogels with a low refractive index of 1.013 have been successfully produced using a new technique. By making use of these aerogels as radiators, we have constructed a Cherenkov counter and have checked its properties in a test beam. The obtained results have demonstrated that our aerogel was transparent enough to make up for loss of the Cherenkov photon yield due to a low refractive index. Various configurations for the photon collection system and some types of photomultipliers, such as the fine-mesh type, for a read out were also tested. From these studies, our design of a Cherenkov counter dedicated to ?/K separation up to a few GeV/c with an efficiency greater than 90 % was considered. 1

I. Adachi; T. Sumiyoshi; K. Hayashi; N. Iida; R. Enomoto; K. Tsukada; R. Suda; S. Matsumoto; K. Natori; M. Yokoyama; H. Yokogawa

1994-01-01T23:59:59.000Z

182

Threshold Resonant Structure of the 232Th Neutron-Induced Fission Cross Section  

E-Print Network (OSTI)

The structures observed in the sub-threshold neutron-induced fission of ^{232}Th were investigated employing a recent developed model. Theoretical single-particle excitations of a phenomenological two-humped barrier are determined by solving a system of coupled differential equations for the motion along the optimal fission path. A rather good agreement with experimental data was obtained using a small number of independent parameters. It is predicted that the structure at 1.4 and 1.6 MeV is mainly dominated by spin 3/2 partial cross-section with small admixture of spin 1/2, while the structure at 1.7 MeV is given by a large partial cross section of spin 5/2.

M. Mirea; L. Tassan-Got; C. Stephan; C. O. Bacri; R. C. Bobulescu

2007-08-08T23:59:59.000Z

183

Strangeness Production close to Threshold in Proton-Nucleus and Heavy-Ion Collisions  

E-Print Network (OSTI)

We discuss strangeness production close to threshold in p+A and A+A collision. Comparing the body of available K+, K0, K-, and Lambda data with the IQMD transport code and for some key observables as well with the HSD transport code, we find good agreement for the large majority of the observables. The investigation of the reaction with help of these codes reveals the complicated interaction of the strange particles with hadronic matter which makes strangeness production in heavy-ion collisions very different from that in elementary interactions. We show how different strange particle observables can be used to study the different facets of this interaction (production, rescattering and potential interaction) which finally merge into a comprehensive understanding of these interactions. We identify those observables which allow for studying (almost) exclusively one of these processes to show how future high precision experiments can improve our quantitative understanding. Finally, we discuss how the K+ multipl...

Hartnack, Christoph; Leifels, Yvonne; Bratkovskaya, Elena L; Aichelin, Jörg

2011-01-01T23:59:59.000Z

184

Anomalous particle-production thresholds through systematic and non-systematic quantum-gravity effects  

E-Print Network (OSTI)

A growing number of studies is being devoted to the identification of plausible quantum properties of spacetime which might give rise to observably large effects. The literature on this subject is now relatively large, including studies in string theory, loop quantum gravity and noncommutative geometry. It is useful to divide the various proposals into proposals involving a systematic quantum-gravity effect (an effect that would shift the main/average prediction for a given observable quantity) and proposals involving a non-systematic quantum-gravity effect (an effect that would introduce new fundamental uncertanties in some observable quantity). The case of quantum-gravity-induced particle-production-threshold anomalies, a much studied example of potentially observable quantum-gravity effect, is here used as an example to illustrate the differences to be expected between systematic and non-systematic effects.

Giovanni Amelino-Camelia; Y. Jack NG; Hendrik Van Dam

2002-04-24T23:59:59.000Z

185

Precise Measurement of the e(+)e(-)->pi(+)pi(-)(gamma) Cross Section with the Initial State Radiation Method at BABAR  

E-Print Network (OSTI)

A precise measurement of the cross section of the process e[superscript +]e[superscript -]??[superscript +]?[superscript -](?) from threshold to an energy of 3 GeV is obtained with the initial state radiation (ISR) method ...

Cowan, Ray Franklin

186

Methods Disclaimer  

Science Conference Proceedings (OSTI)

The American Oil Chemists' Society makes no warranty as to the safety of the methods contained herein Methods Disclaimer Official Methods and Recommended Practices of the AOCS (Methods) aocs applicants certified chemist chemists fats lab laborator

187

Analyzing the distribution of threshold voltage degradation in nanoscale transistors by using reaction-diffusion and percolation theory  

Science Conference Proceedings (OSTI)

Continued scaling of transistors into the nanoscale regime has led to large device-to-device variation in transistor characteristics. These variations reflect differences in substrate doping, channel length, interface and/or oxide defects, etc. among ... Keywords: Exponential distribution, Interface defect statistics, Markov Chain Monte-Carlo, Reaction-diffusion model, Skew-normal distribution, Threshold voltage degradation

Ahmad Ehteshamul Islam; Muhammad Ashraful Alam

2011-12-01T23:59:59.000Z

188

Oxygen and organic matter thresholds for benthic faunal activity on the Pakistan margin oxygen minimum zone (7001100 m)  

E-Print Network (OSTI)

Oxygen and organic matter thresholds for benthic faunal activity on the Pakistan margin oxygen) on the bathyal Pakistan margin, where sediments grade from fully laminated sediment at 700 m (0.12 mL LÃ?1 O2 [5 m matter to generate abrupt faunal transitions on the Pakistan margin. & 2008 Elsevier Ltd. All rights

Levin, Lisa

189

Near-threshold production of the {eta} meson via the quasifree pn{yields}pn{eta} reaction  

Science Conference Proceedings (OSTI)

Total cross sections for the quasifree pn{yields}pn{eta} reaction in the range from the kinematical threshold up to 20 MeV excess energy have been determined. At threshold they exceed corresponding cross sections for the pp{yields}pp{eta} reaction by a factor of about 3 in contrast to the factor of 6 established for higher excess energies. To large extent, the observed decrease of the ratio {sigma}(pn{yields}pn{eta})/{sigma}(pp{yields}pp{eta}) toward threshold may be assigned to the different energy dependence of the proton-proton and proton-neutron final-state interactions. The experiment was conducted using a proton beam of the cooler synchrotron COSY and a cluster jet deuteron target. The proton-neutron reactions were tagged by the spectator proton whose momentum was measured for each event. Protons and neutron outgoing from the pn{yields}pn{eta} reaction have been registered by means of the COSY-11 facility, an apparatus dedicated for threshold meson production.

Moskal, P.; Czerwinski, E.; Janusz, M. [Institute of Physics, Jagiellonian University, PL-30-059 Cracow (Poland); IKP and ZEL, Forschungszentrum Juelich, D-52425 Juelich (Germany); Czyzykiewicz, R.; Gil, D.; Jarczyk, L.; Kamys, B.; Klaja, P.; Majewski, J.; Piskor-Ignatowicz, C.; Przerwa, J.; Rejdych, B.; Silarski, M.; Smyrski, J.; Zielinski, M.; Zdebik, J. [Institute of Physics, Jagiellonian University, PL-30-059 Cracow (Poland); Adam, H.-H.; Khoukaz, A.; Taeschner, A. [IKP, Westfaelische Wilhelms-Universitaet, D-48149 Muenster (Germany); Bass, S. D. [Institute for Theoretical Physics, University of Innsbruck (Austria)] (and others)

2009-01-15T23:59:59.000Z

190

The interpretation of speech reception threshold data in normal-hearing and hearing-impaired listeners: Steady-state noise  

Science Conference Proceedings (OSTI)

Speech-in-noise-measurements are important in clinical practice and have been the subject of research for a long time. The results of these measurements are often described in terms of the speech reception threshold(SRT) and SNR loss. Using the basic concepts that underlie several models of speech recognition in steady-state noise

Cas Smits; Joost M. Festen

2011-01-01T23:59:59.000Z

191

Threshold jumping and wrap-around scan techniques toward efficient tag identification in high density RFID systems  

Science Conference Proceedings (OSTI)

With the emergence of wireless RFID technologies, the problem of Anti-Collision has been arousing attention and instigated researchers to propose different heuristic algorithms for advancing RFID systems operated in more efficient manner. However, there ... Keywords: Query tree, Tag anti-collision, Threshold jumping, Wrap-around scan

Ching-Hsien Hsu; Han-Chieh Chao; Jong Hyuk Park

2011-09-01T23:59:59.000Z

192

Intensity-resolved Above Threshold Ionization Yields of Atoms with Ultrashort Laser Pulses  

E-Print Network (OSTI)

The above threshold ionization (ATI) spectra provide a diversity of information about a laser-atom ionization process such as laser intensity, pulse duration, carrier envelope phase, and atomic energy level spacing. However, the spatial distribution of intensities inherent in all laser beams reduces the resolution of this information. This research focuses on recovering the intensity-resolved ATI spectra from experimental data using a deconvolution algorithm. Electron ionization yields of xenon were measured for a set of laser pulse intensities using a time of flight (TOF) setup. Horizontally polarized, unchirped, 50fs pulses were used in the ionization process. All laser parameters other than the radiation intensity were held constant over the set of intensity measurements. A deconvolution algorithm was developed based on the experimental parameters. Then the deconvolution algorithm was applied to the experimental data to obtain the intensity-resolved total yield probability and ATI spectra. Finally, an error analysis was performed to determine the stability and accuracy of the algorithm as well as the quality of the data. It was found that the algorithm produced greater contrast for peaks in the ATI spectra where atom specific resonant behavior is observed. Additionally, the total yield probability showed that double ionization may be observed in the ionization yield. The error analysis revealed that the algorithm was stable under the experimental conditions for a range of intensities.

Hart, Nathan Andrew

2011-08-01T23:59:59.000Z

193

Diffraction at a time grating in above-threshold ionization: The influence of the Coulomb potential  

SciTech Connect

We analyze the photoelectron emission spectrum in atomic above-threshold ionization by a linearly polarized short-laser pulse. Direct electrons can be characterized by both intracycle and intercycle interferences. The former results from the coherent superposition of two different electron trajectories released in the same optical cycle, whereas the latter is the consequence of the superposition of multiple trajectories released in different cycles. In the present article, a semiclassical analytical expression for the complete (both intracycle and intercycle) interference pattern is derived. We show that the recently proposed semiclassical description in terms of a diffraction process at a time grating remains qualitatively unchanged in the presence of the long-range Coulomb potential. The latter causes only a phase shift of the intracycle interference pattern. We verify the predictions of the semiclassical model by comparison with full three-dimensional (3D) time-dependent Schroedinger equation (TDSE) solutions. One key finding is that the subcycle interference structures originating from trajectories launched within a time interval of less than 1 femtosecond should be experimentally observable also in low-resolution spectra for longer multicycle pulses.

Arbo, Diego G. [Institute for Astronomy and Space Physics, IAFE (CONICET-UBA), CC 67, Suc. 28 (1428) Buenos Aires (Argentina); Department of Physics, FCEN, University of Buenos Aires (Argentina); Ishikawa, Kenichi L. [Photon Science Center, Graduate School of Engineering, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8656 (Japan); Schiessl, Klaus; Persson, Emil; Burgdoerfer, Joachim [Institute for Theoretical Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10/136, A-1040 Vienna (Austria)

2010-10-15T23:59:59.000Z

194

Study of a Threshold Cherenkov Counter Based on Silica Aerogels with Low Refractive Indices  

E-Print Network (OSTI)

To identify $\\pi^{\\pm}$ and $K^{\\pm}$ in the region of $1.0\\sim 2.5$ GeV/c, a threshold Cherenkov counter equipped with silica aerogels has been investigated. Silica aerogels with a low refractive index of 1.013 have been successfully produced using a new technique. By making use of these aerogels as radiators, we have constructed a Cherenkov counter and have checked its properties in a test beam. The obtained results have demonstrated that our aerogel was transparent enough to make up for loss of the Cherenkov photon yield due to a low refractive index. Various configurations for the photon collection system and some types of photomultipliers, such as the fine-mesh type, for a read out were also tested. From these studies, our design of a Cherenkov counter dedicated to $\\pi / K$ separation up to a few GeV/c %in the momentum range of $1.0 \\sim 2.5$ GeV/c with an efficiency greater than $90$ \\% was considered.

I. Adachi et al

1994-12-13T23:59:59.000Z

195

Phase space path-integral formulation of the above-threshold ionization  

SciTech Connect

Atoms and molecules submitted to a strong laser field can emit electrons of high energies in the above-threshold ionization (ATI) process. This process finds a highly intuitive and also quantitative explanation in terms of Feynman's path integral and the concept of quantum orbits [P. Salieres et al., Science 292, 902 (2001)]. However, the connection with the Feynman path-integral formalism is explained only by intuition and analogy and within the so-called strong-field approximation (SFA). Using the phase space path-integral formalism we have obtained an exact result for the momentum-space matrix element of the total time-evolution operator. Applying this result to the ATI we show that the SFA and the so-called improved SFA are, respectively, the zeroth- and the first-order terms of the expansion in powers of the laser-free effective interaction of the electron with the rest of the atom (molecule). We have also presented the second-order term of this expansion which is responsible for the ATI with double scattering of the ionized electron.

Milosevic, D. B. [Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, 71000 Sarajevo (Bosnia and Herzegowina) [Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, 71000 Sarajevo (Bosnia and Herzegowina); Max-Born-Institut, Max-Born-Str. 2a, 12489 Berlin (Germany); Academy of Sciences and Arts of Bosnia and Herzegovina, Bistrik 7, 71000 Sarajevo (Bosnia and Herzegowina)

2013-04-15T23:59:59.000Z

196

STAR FORMATION LAWS AND THRESHOLDS FROM INTERSTELLAR MEDIUM STRUCTURE AND TURBULENCE  

Science Conference Proceedings (OSTI)

We present an analytical model of the relation between the surface density of gas and star formation rate in galaxies and clouds, as a function of the presence of supersonic turbulence and the associated structure of the interstellar medium (ISM). The model predicts a power-law relation of index 3/2, flattened under the effects of stellar feedback at high densities or in very turbulent media, and a break at low surface densities when ISM turbulence becomes too weak to induce strong compression. This model explains the diversity of star formation laws and thresholds observed in nearby spirals and their resolved regions, the Small Magellanic Cloud, high-redshift disks and starbursting mergers, as well as Galactic molecular clouds. While other models have proposed interstellar dust content and molecule formation to be key ingredients to the observed variations of the star formation efficiency, we demonstrate instead that these variations can be explained by ISM turbulence and structure in various types of galaxies.

Renaud, Florent; Kraljic, Katarina; Bournaud, Frederic, E-mail: florent.renaud@cea.fr [Laboratoire AIM Paris-Saclay, CEA/IRFU/SAp, Universite Paris Diderot, F-91191 Gif-sur-Yvette Cedex (France)

2012-11-20T23:59:59.000Z

197

A Spin-down Power Threshold for Pulsar Wind Nebula Generation?  

E-Print Network (OSTI)

A systematic X-ray survey of the most energetic rotation-powered pulsars known, based on spin-down energy loss rate, $\\dot E$ = $I\\omega\\dot\\omega$, shows that all energetic pulsars with $\\dot E > \\dot E_{c} \\approx 3.4 \\times\\ 10^{36}$ erg s$^{-1}$ are X-ray bright, manifest a distinct pulsar wind nebula (PWN), and are associated with a supernova event, either historically or via a thermal remnant, with over half residing in shell-like supernova remnants. Below $\\dot E_c$, the 2-10 keV PWN flux ratio $F_{PWN}/F_{PSR}$ decreases by an order-of-magnitude. This threshold is predicted by the lower limit on the spectral slope $\\Gamma_{min} \\approx 0.5$ observed for rotation-powered pulsars (Gotthelf 2003). The apparent lack of bright pulsar nebulae below a critical Edot suggests a change in the particle injection spectrum and serves as a constraint on emission models for rotation-powered pulsars. Neither a young age nor a high density environment is found to be a sufficient condition for generating a PWN, as often suggested, instead the spin-down energy loss rate is likely the key parameter in determining the evolution of a rotation-powered pulsar.

E. V. Gotthelf

2006-10-12T23:59:59.000Z

198

Precise measurement of the e[superscript +]e[superscript -]??[superscript +]?[superscript -](?) cross section with the initial-state radiation method at BABAR  

E-Print Network (OSTI)

A precise measurement of the cross section of the process e[superscript +]e[superscript -]??[superscript +]?[superscript -](?) from threshold to an energy of 3 GeV is obtained with the initial-state radiation (ISR) method ...

Sciolla, Gabriella

199

Single top quark production at the Fermilab Tevatron: Threshold resummation and finite-order soft gluon corrections  

SciTech Connect

I present a calculation of threshold soft-gluon corrections to single top-quark production in pp collisions via all partonic processes in the t and s channels and via associated top quark and W boson production. The soft-gluon corrections are formally resummed to all orders, and finite-order expansions of the resummed cross section are calculated through next-to-next-to-next-to-leading-order (NNNLO) at next-to-leading logarithmic (NLL) accuracy. Numerical results for single top-quark production at the Tevatron are presented, including the dependence of the cross sections on the top-quark mass and on the factorization and renormalization scales. The threshold corrections in the t channel are small while in the s channel they are large and dominant. Associated tW production remains relatively minor due to the small leading-order cross section even though the K factors are large.

Kidonakis, Nikolaos [Kennesaw State University, Physics 1202, 1000 Chastain Rd., Kennesaw, Georgia 30144-5591 (United States)

2006-12-01T23:59:59.000Z

200

Exotic Effects at the Charm Threshold and Other Novel Physics Topics at JLab-12 GeV  

Science Conference Proceedings (OSTI)

I briefly survey a number of novel hadron physics topics which can be investigated with the 12 GeV upgrade at J-Lab. The topics include new the formation of exotic heavy quark resonances accessible above the charm threshold, intrinsic charm and strangeness phenomena, the exclusive Sivers effect, hidden-color Fock states of nuclei, local two-photon interactions in deeply virtual Compton scattering, and non-universal antishadowing.

Brodsky, Stanley J.; /SLAC

2012-05-03T23:59:59.000Z

Note: This page contains sample records for the topic "bispectral threshold method" 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

Microscopy Methods  

Science Conference Proceedings (OSTI)

... NIST has worked extensively with microscope manufacturers such as FEI ... Electron microscopy methods have been used to characterize potential ...

2012-10-05T23:59:59.000Z

202

Correlation methods  

DOE Green Energy (OSTI)

Correlation methods have been developed to provide a quick and relatively simple technique for estimating the performance of passive solar systems. The correlations are done with respect to data generated from simulation models. The techniques and accuracies are described. Both the Solar Load Ratio and Un-Utilizability methods are described. The advantages and limitations of correlation methods as design tools are discussed.

Balcomb, J.D.

1981-01-01T23:59:59.000Z

203

Evolution of exciton states near the percolation threshold in two-phase systems with II-VI semiconductor quantum dots  

SciTech Connect

From studies of two-phase systems (borosilicate matrices containing ZnSe or CdS quantum dots), it was found that the systems exhibit a specific feature associated with the percolation phase transition of charge carriers (excitons). The transition manifests itself as radical changes in the optical spectra of both ZnSe and CdS quantum dot systems and by fluctuations of the emission band intensities near the percolation threshold. These effects are due to microscopic fluctuations of the density of quantum dots. The average spacing between quantum dots is calculated taking into account their finite dimensions and the volume fraction occupied by the quantum dots at the percolation threshold. It is shown that clustering of quantum dots occurs via tunneling of charge carriers between the dots. A physical mechanism responsible for the percolation threshold for charge carriers is suggested. In the mechanism, the permittivity mismatch of the materials of the matrix and quantum dots plays an important role in delocalization of charge carriers (excitons): due to the mismatch, 'a dielectric trap' is formed at the external surface of the interface between the matrix and a quantum dot and, thus, surface exciton states are formed there. The critical concentrations of quantum dots are determined, such that the spatial overlapping of such surface states provides the percolation transition in both systems.

Bondar, N. V., E-mail: jbond@iop.kiev.ua; Brodyn, M. S. [National Academy of Sciences of Ukraine, Institute of Physics (Ukraine)

2010-07-15T23:59:59.000Z

204

Method for microbeam radiation therapy  

DOE Patents (OSTI)

A method of performing radiation therapy on a patient, involving exposing a target, usually a tumor, to a therapeutic dose of high energy electromagnetic radiation, preferably X-ray radiation, in the form of at least two non-overlapping microbeams of radiation, each microbeam having a width of less than about 1 millimeter. Target tissue exposed to the microbeams receives a radiation dose during the exposure that exceeds the maximum dose that such tissue can survive. Non-target tissue between the microbeams receives a dose of radiation below the threshold amount of radiation that can be survived by the tissue, and thereby permits the non-target tissue to regenerate. The microbeams may be directed at the target from one direction, or from more than one direction in which case the microbeams overlap within the target tissue enhancing the lethal effect of the irradiation while sparing the surrounding healthy tissue.

Slatkin, Daniel N. (Sound Beach, NY); Dilmanian, F. Avraham (Yaphank, NY); Spanne, Per O. (Shoreham, NY)

1994-01-01T23:59:59.000Z

205

Method for microbeam radiation therapy  

DOE Patents (OSTI)

A method is disclosed of performing radiation therapy on a patient, involving exposing a target, usually a tumor, to a therapeutic dose of high energy electromagnetic radiation, preferably X-ray radiation. The dose is in the form of at least two non-overlapping microbeams of radiation, each microbeam having a width of less than about 1 millimeter. Target tissue exposed to the microbeams receives a radiation dose during the exposure that exceeds the maximum dose that such tissue can survive. Non-target tissue between the microbeams receives a dose of radiation below the threshold amount of radiation that can be survived by the tissue, and thereby permits the non-target tissue to regenerate. The microbeams may be directed at the target from one direction, or from more than one direction in which case the microbeams overlap within the target tissue enhancing the lethal effect of the irradiation while sparing the surrounding healthy tissue. No Drawings

Slatkin, D.N.; Dilmanian, F.A.; Spanne, P.O.

1994-08-16T23:59:59.000Z

206

Study of small carbon and semiconductor clusters using negative ion threshold photodetachment spectroscopy  

SciTech Connect

The bonding and electronics of several small carbon and semiconductor clusters containing less than ten atoms are probed using negative ion threshold photodetachment (zero electron kinetic energy, or ZEKE) spectroscopy. ZEKE spectroscopy is a particularly advantageous technique for small cluster study, as it combines mass selection with good spectroscopic resolution. The ground and low-lying electronic states of small clusters in general can be accessed by detaching an electron from the ground anion state. The clusters studied using this technique and described in this work are C{sub 6}{sup {minus}}/C{sub 6}, Si{sub n}{sup {minus}}/Si{sub n} (n = 2, 3, 4), Ge{sub 2}{sup {minus}}/Ge{sub 2}, In{sub 2}P{sup {minus}}/In{sub 2}P,InP{sub 2}{sup {minus}}/InP{sup 2}, and Ga{sub 2}As{sup {minus}}. The total photodetachment cross sections of several other small carbon clusters and the ZEKE spectrum of the I{sup {minus}}{center_dot}CH{sub 3}I S{sub N}2 reaction complex are also presented to illustrate the versatility of the experimental apparatus. Clusters with so few atoms do not exhibit bulk properties. However, each specie exhibits bonding properties that relate to the type of bonding found in the bulk. C{sub 6}, as has been predicted, exhibits a linear cumulenic structure, where double bonds connect all six carbon atoms. This double bonding reflects how important {pi} bonding is in certain phases of pure carbon (graphite and fullerenes). The symmetric stretch frequencies observed in the C{sub 6}{sup {minus}} spectra, however, are in poor agreement with the calculated values. Also observed as sharp structure in total photodetachment cross section scans was an excited anion state bound by only {approximately}40 cm{sup {minus}1} relative to the detachment continuum. This excited anion state appears to be a valence bound state, possible because of the high electron affinity of C{sub 6}, and the open shell of the anion.

Arnold, C.C.

1994-08-01T23:59:59.000Z

207

Photoionization thresholds of rare-earth impurity ions. EuS :CaF2, CeT :YAG, and SmS :CaF2  

SciTech Connect

The spectral dependence of the photoionization energy of EuS :CaF2, CeT :YAG, and SmS :CaF2 systems have been measured and thresholds experimentally determined and compared with theoretical values calculated from electrostatic models. It is shown that the excited state absorption transitions or the persistent hole burning observed by other authors occur above the threshold energy of photoionization of the impurities and that the states of the crystal which form the bottom of the conduction band may play an important role in the strong probability of these processes. A review of thresholds now known is also given.

Pedrini, C.; Rogemond, F.; McClure, D.S.

1986-02-15T23:59:59.000Z

208

Sub-threshold production of $\\Sigma$(1385) baryons in Al+Al collisions at 1.9$A$ GeV  

E-Print Network (OSTI)

First measurement of sub-threshold $\\Sigma$(1385) production is presented. Experimental data are presented for Al+Al reactions at 1.9$A$ GeV measured with the FOPI detector at SIS/GSI. The $\\Sigma$(1385)/$\\Lambda$ ratio is found to be in good agreement with the transport and statistical model predictions. The results allow for a better understanding of sub-threshold strangeness production and strangeness exchange reaction which is the dominant process for $K^-$ production below and close-to threshold.

Lopez, FOPI Collboration: X; Crochet, P

2007-01-01T23:59:59.000Z

209

Connection method  

DOE Patents (OSTI)

A method is disclosed of making a region exhibiting a range of compositions, comprising plasma spraying various compositions on top of one another onto a base. 2 figs.

Weyand, J.D.

1986-11-18T23:59:59.000Z

210

Connection method  

SciTech Connect

A method of making a region exhibiting a range of compositions, comprising plasma spraying various compositions on top of one another onto a base.

Weyand, John D. (Greensburg, PA)

1986-01-01T23:59:59.000Z

211

Test Methods  

Science Conference Proceedings (OSTI)

... of the robot, operator control unit (OCU), payload, and batteries • Tools needed ... this test method is to quantitatively evaluate the battery capacity per ...

2010-10-05T23:59:59.000Z

212

Beta wavelet based ECG signal compression using lossless encoding with modified thresholding  

Science Conference Proceedings (OSTI)

In this paper, an ECG compression method based on beta wavelet using lossless encoding technique is presented. Wavelet based compression techniques minimize the compression distortion, while run-length encoding (RLE) further increases the compression ...

Ranjeet Kumar; A. Kumar; Rajesh K. Pandey

2013-01-01T23:59:59.000Z

213

Perceptual thresholds for detecting modifications applied to the acoustical properties of a violin  

Science Conference Proceedings (OSTI)

This study is the first step in the psychoacoustic exploration of perceptual differences between the sounds of different violins. A method was used which enabled the same performance to be replayed on different “virtual violins

Claudia Fritz; Ian Cross; Brian C. J. Moore; Jim Woodhouse

2007-01-01T23:59:59.000Z

214

Evaluation of Shear Strength Threshold of Concern for Retrieval of Interim-Stored K-Basin Sludge in the Hanford Site  

SciTech Connect

K-Basin sludge will be recovered into the Sludge Transport and Storage Containers (STSCs) and will be stored in the T Plant for interim storage (at least 10 years). Long-term sludge storage tests conducted by Pacific Northwest National Laboratory show that high uranium content K Basin sludge can self-cement and form a strong sludge with a bulk shear strength of up to 65 kPa. Some of this sludge has "paste" and "chunks" with shear strengths of approximately 3~5 kPa and 380 ~ 770 kPa, respectively. High uranium content sludge samples subjected to hydrothermal testing (e.g., 185°C, 10 h) have been observed to form agglomerates with a shear strength up to 170 kPa. After interim storage at T Plant, the sludge in the STSCs will be mobilized by water jets impinging the sludge. The objective of the evaluation was to determine the range of sludge shear strength for which there is high confidence that a water-jet retrieval system can mobilize stored K-Basin sludge from STSCs. The shear strength at which the sludge can be retrieved is defined as the "shear strength threshold of concern." If the sludge shear strength is greater than the value of the shear strength threshold of concern, a water-jet retrieval system will be unlikely to mobilize the sludge up to the container’s walls. The shear strength threshold of concern can be compared with the range of possible shear strengths of K-Basin stored sludge to determine if the current post interim-storage, water-jet retrieval method is adequate. Fourteen effective cleaning radius (ECR) models were reviewed, and their validity was examined by applying them to Hanford 241-SY-101 and 241-AZ-101 Tanks to reproduce the measured ECR produced by the mixer pumps. The validation test identified that the Powell-3 and Crowe-2 ECR models are more accurate than other ECR models reviewed. These ECR models were used to address a question as to whether the effective cleaning radius of a water jet is sufficient or if it can be readily expanded to cover the range of possible shear strengths. These results will assist CH2M HILL Plateau Remediation Company (CHPRC) to establish the technical basis of the feasibility of the sludge retrieval and storage plan and to develop an adequate water jet system to retrieve the stored K-Basin sludge in the STSCs. The STSCs are 2:1 elliptical-head vessels, 58 inches in diameter and 105 inches tall. Each STSC will contain 0.5 to 2.1 m3 of settled sludge with the specific loading dependent upon sludge type.

Onishi, Yasuo; Yokuda, Satoru T.; Schmidt, Andrew J.

2010-11-01T23:59:59.000Z

215

Hadron Physics at the Charm and Bottom Thresholds and Other Novel QCD Physics Topics at the NICA Accelerator Facility  

Science Conference Proceedings (OSTI)

The NICA collider project at the Joint Institute for Nuclear Research in Dubna will have the capability of colliding protons, polarized deuterons, and nuclei at an effective nucleon-nucleon center-of mass energy in the range {radical}s{sub NN} = 4 to 11 GeV. I briefly survey a number of novel hadron physics processes which can be investigated at the NICA collider. The topics include the formation of exotic heavy quark resonances near the charm and bottom thresholds, intrinsic strangeness, charm, and bottom phenomena, hidden-color degrees of freedom in nuclei, color transparency, single-spin asymmetries, the RHIC baryon anomaly, and non-universal antishadowing.

Brodsky, Stanley J.; /SLAC

2012-06-20T23:59:59.000Z

216

Next-to-next-to-next-to-leading-order soft-gluon corrections in hard-scattering processes near threshold  

SciTech Connect

I present a unified calculation of soft-gluon corrections to hard-scattering cross sections through next-to-next-to-next-to-leading order (NNNLO). Master formulas are derived, from a threshold resummation formalism, that can be applied to total and differential cross sections for hard-scattering processes in hadron colliders. I also present numerical results for charged Higgs production at the LHC where these corrections are large, and for top quark production at the Tevatron where these corrections greatly reduce the scale dependence of the cross section.

Kidonakis, Nikolaos [Kennesaw State University, Physics 1202 1000 Chastain Road, Kennesaw, Georgia 30144-5591 (United States)

2006-02-01T23:59:59.000Z

217

Methods Development  

Science Conference Proceedings (OSTI)

ISO committee and more information on standardization effects pertaining to AOCS. Methods Development Analytical Chemistry acid analysis Analytical Chemistry aocs applicants april articles atomic)FluorometryDifferential scanning calorimetry chemist chemi

218

Dressed-bound-state molecular strong-field approximation: Application to above-threshold ionization of heteronuclear diatomic molecules  

Science Conference Proceedings (OSTI)

The molecular strong-field approximation (MSFA), which includes dressing of the molecular bound state, is introduced and applied to above-threshold ionization of heteronuclear diatomic molecules. Expressions for the laser-induced molecular dipole and polarizability as functions of the laser parameters (intensity and frequency) and molecular parameters [molecular orientation, dipole, and parallel and perpendicular polarizabilities of the highest occupied molecular orbital (HOMO)] are presented. Our previous MSFA theory, which incorporates the rescattering effects, is generalized from homonuclear to heteronuclear diatomic molecules. Angle- and energy-resolved high-order above-threshold ionization spectra of oriented heteronuclear diatomic molecules, exemplified by the carbon monoxide (CO) molecule, exhibit pronounced minima, which can be related to the shape of their HOMO-electron-density distribution. For the CO molecule we have found an analytical condition for the positions of these minima. We have also shown that the effect of the dressing of the HOMO is twofold: (i) the laser-induced Stark shift decreases the ionization yield and (ii) the laser-induced time-dependent dipole and polarizability change the oscillatory structure of the spectra.

Hasovic, E. [Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, BA-71000 Sarajevo (Bosnia and Herzegowina); Max-Born-Institut, Max-Born-Strasse 2a, DE-12489 Berlin (Germany); Busuladzic, M. [Medical Faculty, University of Sarajevo, Cekalusa 90, BA-71000 Sarajevo (Bosnia and Herzegowina); Becker, W. [Max-Born-Institut, Max-Born-Strasse 2a, DE-12489 Berlin (Germany); Milosevic, D. B. [Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, BA-71000 Sarajevo (Bosnia and Herzegowina); Max-Born-Institut, Max-Born-Strasse 2a, DE-12489 Berlin (Germany); Academy of Sciences and Arts of Bosnia and Herzegovina, Bistrik 7, BA-71000 Sarajevo (Bosnia and Herzegowina)

2011-12-15T23:59:59.000Z

219

Near-threshold production of a0(980) mesons in the reaction pp -> d K^+ \\bar{K}^0  

E-Print Network (OSTI)

Using an effective Lagrangian approach as well as the Quark-Gluon Strings Model we analyze near-threshold production of a0(980)-mesons in the reaction NN -> d K \\bar{K} as well as the background of non-resonant K\\bar{K}-pair production. We argue that the reaction pp -> d K^+ \\bar{K}^0 at an energy release Qproduction of the a0(980)-resonance. At larger energies the non-resonant K^+\\bar{K}^0-pair production - where the kaons are produced in a relative P-wave - becomes important. Then effects of final-state interactions are evaluated in a unitarized scattering-length approach and found to be in the order of a 20% suppression close to threshold. Thus in present experiments at the Cooler Synchrotron COSY-J\\"ulich for Q<=107 MeV the a_0^+ signal can reliably be separated from the non-resonant K^+\\bar{K^0} background.

V. Yu. Grishina; L. A. Kondratyuk; M. Buescher; W. Cassing

2004-02-25T23:59:59.000Z

220

Sediment quality thresholds: Estimates from hockey stick regression of liver lesion prevalence in English sole (Pleuronectes vetulus)  

Science Conference Proceedings (OSTI)

Comprehensive, integrative assessments of coastal sediment quality are best effected by using large, diverse data sets that include measures of biological dysfunction observed in association with chronic exposure to sediment contaminants. Under the auspices of the National Oceanic and Atmospheric Administration`s National Status and Trends Program, the National Benthic Surveillance Project accumulated a database of synoptic sediment contaminant concentrations and indices of biological effects that were measured in indigenous animals collected during field surveys conducted from 1984 to 1994. This compilation of data provided the opportunity to develop a new approach for determining sediment quality criteria to add to the current repertoire of environmental assessment tools. Using a two-segment hockey stick regression, statistically significant chemical thresholds of biological effects were estimated for hepatic lesion prevalences in English sole (Pleuronectes vetulus, formerly Parophrys vetulus) in relation to sediment concentrations of polycyclic aromatic hydrocarbons. These threshold estimates are notably lower than many of those reported for other techniques. Application of this relatively simple dose-response model to subacute, chronic effects that are involved in pepatocarcinogenesis and associated with sediment toxicant content (1) reflects the link between toxicopathic disease progression and conditions observed in benthic fish exposed to contaminants and (2) provides endpoints for assessing sediment quality contaminant concentrations that are not necessarily acutely fatal but may have long-term health implications for populations that are chronically exposed.

Horness, B.H.; Lomax, D.P.; Johnson, L.L.; Myers, M.S.; Pierce, S.M.; Collier, T.K. [National Oceanic and Atmospheric Administration, Seattle, WA (United States)

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "bispectral threshold method" from the National Library of EnergyBeta (NLEBeta).
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221

Method and system for controlling a synchronous machine over full operating range  

DOE Patents (OSTI)

System and method for controlling a synchronous machine are provided. The method allows for calculating a stator voltage index. The method further allows for relating the magnitude of the stator voltage index against a threshold voltage value. An offset signal is generated based on the results of the relating step. A respective state of operation of the machine is determined. The offset signal is processed based on the respective state of the machine.

Walters, James E. (Carmel, IN); Gunawan, Fani S. (Westfield, IN); Xue, Yanhong (Westfield, IN)

2002-01-01T23:59:59.000Z

222

Method and system for managing an electrical output of a turbogenerator  

SciTech Connect

The system and method manages an electrical output of a turbogenerator in accordance with multiple modes. In a first mode, a direct current (DC) bus receives power from a turbogenerator output via a rectifier where turbogenerator revolutions per unit time (e.g., revolutions per minute (RPM)) or an electrical output level of a turbogenerator output meet or exceed a minimum threshold. In a second mode, if the turbogenerator revolutions per unit time or electrical output level of a turbogenerator output are less than the minimum threshold, the electric drive motor or a generator mechanically powered by the engine provides electrical energy to the direct current bus.

Stahlhut, Ronnie Dean (Bettendorf, IA); Vuk, Carl Thomas (Denver, IA)

2009-06-02T23:59:59.000Z

223

Method and system for managing an electrical output of a turbogenerator  

DOE Patents (OSTI)

The system and method manages an electrical output of a turbogenerator in accordance with multiple modes. In a first mode, a direct current (DC) bus receives power from a turbogenerator output via a rectifier where turbogenerator revolutions per unit time (e.g., revolutions per minute (RPM)) or an electrical output level of a turbogenerator output meet or exceed a minimum threshold. In a second mode, if the turbogenerator revolutions per unit time or electrical output level of a turbogenerator output are less than the minimum threshold, the electric drive motor or a generator mechanically powered by the engine provides electrical energy to the direct current bus.

Stahlhut, Ronnie Dean (Bettendorf, IA); Vuk, Carl Thomas (Denver, IA)

2010-08-24T23:59:59.000Z

224

Identification of Low-Dimensional Energy Containing/Flux Transporting Eddy Motion in the Atmospheric Surface Layer Using Wavelet Thresholding Methods  

Science Conference Proceedings (OSTI)

The partitioning of turbulent perturbations into a “low-dimensional” active part responsible for much of the turbulent energy and fluxes and a “high-dimensional” passive part that contributes little to turbulent energy and transport dynamics is ...

Gabriel Katul; Brani Vidakovic

1998-02-01T23:59:59.000Z

225

Infrared emitting device and method  

DOE Patents (OSTI)

An infrared emitting device and method. The infrared emitting device comprises a III-V compound semiconductor substrate upon which are grown a quantum-well active region having a plurality of quantum-well layers formed of a ternary alloy comprising InAsSb sandwiched between barrier layers formed of a ternary alloy having a smaller lattice constant and a larger energy bandgap than the quantum-well layers. The quantum-well layers are preferably compressively strained to increase the threshold energy for Auger recombination; and a method is provided for determining the preferred thickness for the quantum-well layers. Embodiments of the present invention are described having at least one cladding layer to increase the optical and carrier confinement in the active region, and to provide for waveguiding of the light generated within the active region. Examples have been set forth showing embodiments of the present invention as surface- and edge-emitting light emitting diodes (LEDs), an optically-pumped semiconductor laser, and an electrically-injected semiconductor diode laser. The light emission from each of the infrared emitting devices of the present invention is in the midwave infrared region of the spectrum from about 2 to 6 microns.

Kurtz, Steven R. (Albuquerque, NM); Biefeld, Robert M. (Albuquerque, NM); Dawson, L. Ralph (Albuquerque, NM); Howard, Arnold J. (Albuquerque, NM); Baucom, Kevin C. (Albuquerque, NM)

1997-01-01T23:59:59.000Z

226

SINTERING METHOD  

DOE Patents (OSTI)

Methods of making articles by powder metallurgy techniques are presented. An article is made by packing a metal powder into a desired shape, raising the temperature of the powder compact to a sintering temperature in the presence of a reducing gas, and alternately increasing and decreasing the pressure of the gas while the temperatume is being raised. The product has a greater density than can be achieved by sintering for the same length of time at a constant gas pressure. (AEC)

Googin, J.M.

1963-11-01T23:59:59.000Z

227

Method of quantitating dsDNA  

DOE Patents (OSTI)

A method for quantitating dsDNA in an aqueous sample solution containing an unknown amount of dsDNA. A first aqueous test solution containing a known amount of a fluorescent dye-dsDNA complex and at least one fluorescence-attenutating contaminant is prepared. The fluorescence intensity of the test solution is measured. The first test solution is diluted by a known amount to provide a second test solution having a known concentration of dsDNA. The fluorescence intensity of the second test solution is measured. Additional diluted test solutions are similarly prepared until a sufficiently dilute test solution having a known amount of dsDNA is prepared that has a fluorescence intensity that is not attenuated upon further dilution. The value of the maximum absorbance of this solution between 200-900 nanometers (nm), referred to herein as the threshold absorbance, is measured. A sample solution having an unknown amount of dsDNA and an absorbance identical to that of the sufficiently dilute test solution at the same chosen wavelength is prepared. Dye is then added to the sample solution to form the fluorescent dye-dsDNA-complex, after which the fluorescence intensity of the sample solution is measured and the quantity of dsDNA in the sample solution is determined. Once the threshold absorbance of a sample solution obtained from a particular environment has been determined, any similarly prepared sample solution taken from a similar environment and having the same value for the threshold absorbance can be quantified for dsDNA by adding a large excess of dye to the sample solution and measuring its fluorescence intensity.

Stark, Peter C. (Los Alamos, NM); Kuske, Cheryl R. (Los Alamos, NM); Mullen, Kenneth I. (Los Alamos, NM)

2002-01-01T23:59:59.000Z

228

Universal squash model for optical communications using linear optics and threshold detectors  

SciTech Connect

Transmission of photons through open-air or optical fibers is an important primitive in quantum-information processing. Theoretical descriptions of this process often consider single photons as information carriers and thus fail to accurately describe experimental implementations where any number of photons may enter a detector. It has been a great challenge to bridge this big gap between theory and experiments. One powerful method for achieving this goal is by conceptually squashing the received multiphoton states to single-photon states. However, until now, only a few protocols admit a squash model; furthermore, a recently proven no-go theorem appears to rule out the existence of a universal squash model. Here we show that a necessary condition presumed by all existing squash models is in fact too stringent. By relaxing this condition, we find that, rather surprisingly, a universal squash model actually exists for many protocols, including quantum key distribution, quantum state tomography, Bell's inequality testing, and entanglement verification.

Fung, Chi-Hang Fred; Chau, H. F. [Department of Physics and Center of Computational and Theoretical Physics, University of Hong Kong, Pokfulam Road (Hong Kong); Lo, Hoi-Kwong [Center for Quantum Information and Quantum Control, Department of Physics and Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, M5S 3G4 (Canada)

2011-08-15T23:59:59.000Z

229

Universal Squash Model For Optical Communications Using Linear Optics And Threshold Detectors  

E-Print Network (OSTI)

The transmission of photons through open-air or an optical fiber is an important primitive in quantum information processing. Theoretical description of such a transmission process often considers only a single photon as the information carrier and thus fails to accurately describe experimental optical implementations where any number of photons may enter a detector. It is important to bridge this big gap between experimental implementations and the theoretical description. One powerful method that emerges from recent efforts to achieve this goal is to consider a squash model that conceptually converts multi-photon states to single-photon states, thereby justifying the equivalence between theory and experiments. However, up to now, only a limited number of protocols admit a squash model; furthermore, a no-go theorem has been proven which appears to rule out the existence of a universal squash model. Here, we observe that an apparently necessary condition demanded by all existing squash models to preserve measurement statistics is too stringent a requirement for many protocols. By chopping this requirement, we show that rather surprisingly, a universal squash model actually exists for a wide range of protocols including quantum key distribution protocols, quantum state tomography, the testing of Bell's inequalities, and entanglement verification, despite the standard no-go theorem.

Chi-Hang Fred Fung; H. F. Chau; Hoi-Kwong Lo

2010-11-12T23:59:59.000Z

230

WELDING METHOD  

DOE Patents (OSTI)

A semi-automatic method is described for the weld joining of pipes and fittings which utilizes the inert gasshielded consumable electrode electric arc welding technique, comprising laying down the root pass at a first peripheral velocity and thereafter laying down the filler passes over the root pass necessary to complete the weld by revolving the pipes and fittings at a second peripheral velocity different from the first peripheral velocity, maintaining the welding head in a fixed position as to the specific direction of revolution, while the longitudinal axis of the welding head is disposed angularly in the direction of revolution at amounts between twenty minutas and about four degrees from the first position.

Cornell, A.A.; Dunbar, J.V.; Ruffner, J.H.

1959-09-29T23:59:59.000Z

231

Casting methods  

DOE Patents (OSTI)

A casting device includes a covered crucible having a top opening and a bottom orifice, a lid covering the top opening, a stopper rod sealing the bottom orifice, and a reusable mold having at least one chamber, a top end of the chamber being open to and positioned below the bottom orifice and a vacuum tap into the chamber being below the top end of the chamber. A casting method includes charging a crucible with a solid material and covering the crucible, heating the crucible, melting the material, evacuating a chamber of a mold to less than 1 atm absolute through a vacuum tap into the chamber, draining the melted material into the evacuated chamber, solidifying the material in the chamber, and removing the solidified material from the chamber without damaging the chamber.

Marsden, Kenneth C.; Meyer, Mitchell K.; Grover, Blair K.; Fielding, Randall S.; Wolfensberger, Billy W.

2012-12-18T23:59:59.000Z

232

Method and apparatus for biological sequence comparison  

DOE Patents (OSTI)

A method and apparatus are disclosed for comparing biological sequences from a known source of sequences, with a subject (query) sequence. The apparatus takes as input a set of target similarity levels (such as evolutionary distances in units of PAM), and finds all fragments of known sequences that are similar to the subject sequence at each target similarity level, and are long enough to be statistically significant. The invention device filters out fragments from the known sequences that are too short, or have a lower average similarity to the subject sequence than is required by each target similarity level. The subject sequence is then compared only to the remaining known sequences to find the best matches. The filtering member divides the subject sequence into overlapping blocks, each block being sufficiently large to contain a minimum-length alignment from a known sequence. For each block, the filter member compares the block with every possible short fragment in the known sequences and determines a best match for each comparison. The determined set of short fragment best matches for the block provide an upper threshold on alignment values. Regions of a certain length from the known sequences that have a mean alignment value upper threshold greater than a target unit score are concatenated to form a union. The current block is compared to the union and provides an indication of best local alignment with the subject sequence. 5 figs.

Marr, T.G.; Chang, W.I.

1997-12-23T23:59:59.000Z

233

Method and apparatus for biological sequence comparison  

DOE Patents (OSTI)

A method and apparatus for comparing biological sequences from a known source of sequences, with a subject (query) sequence. The apparatus takes as input a set of target similarity levels (such as evolutionary distances in units of PAM), and finds all fragments of known sequences that are similar to the subject sequence at each target similarity level, and are long enough to be statistically significant. The invention device filters out fragments from the known sequences that are too short, or have a lower average similarity to the subject sequence than is required by each target similarity level. The subject sequence is then compared only to the remaining known sequences to find the best matches. The filtering member divides the subject sequence into overlapping blocks, each block being sufficiently large to contain a minimum-length alignment from a known sequence. For each block, the filter member compares the block with every possible short fragment in the known sequences and determines a best match for each comparison. The determined set of short fragment best matches for the block provide an upper threshold on alignment values. Regions of a certain length from the known sequences that have a mean alignment value upper threshold greater than a target unit score are concatenated to form a union. The current block is compared to the union and provides an indication of best local alignment with the subject sequence.

Marr, Thomas G. (Huntington, NY); Chang, William I-Wei (Huntington, NY)

1997-01-01T23:59:59.000Z

234

Photo- and electroproduction of K{sup 0{Lambda}} near threshold and effects of the K{sup 0} electromagnetic form factor  

SciTech Connect

By extending our previous isobar model to the K{sup 0{Lambda}} isospin channel, we investigate the properties of the K{sup 0{Lambda}} photo- and electroproduction at energies near threshold. It is found that the pseudovector coupling yields significantly larger cross sections. Variation of the K{sub 1} coupling constants has significant effect only on the pseudovector model. The electromagnetic form factor of the neutral kaon K{sup 0} is found to have a sizable effect on the longitudinal cross section of the K{sup 0{Lambda}} electroproduction near the threshold.

Mart, T. [Departemen Fisika, FMIPA, Universitas Indonesia, Depok 16424 (Indonesia)

2011-04-15T23:59:59.000Z

235

Infrared emitting device and method  

DOE Patents (OSTI)

The infrared emitting device comprises a III-V compound semiconductor substrate upon which are grown a quantum-well active region having a plurality of quantum-well layers formed of a ternary alloy comprising InAsSb sandwiched between barrier layers formed of a ternary alloy having a smaller lattice constant and a larger energy bandgap than the quantum-well layers. The quantum-well layers are preferably compressively strained to increase the threshold energy for Auger recombination; and a method is provided for determining the preferred thickness for the quantum-well layers. Embodiments of the present invention are described having at least one cladding layer to increase the optical and carrier confinement in the active region, and to provide for waveguiding of the light generated within the active region. Examples have been set forth showing embodiments of the present invention as surface- and edge-emitting light emitting diodes (LEDs), an optically-pumped semiconductor laser, and an electrically-injected semiconductor diode laser. The light emission from each of the infrared emitting devices of the present invention is in the midwave infrared region of the spectrum from about 2 to 6 microns. 8 figs.

Kurtz, S.R.; Biefeld, R.M.; Dawson, L.R.; Howard, A.J.; Baucom, K.C.

1997-04-29T23:59:59.000Z

236

Low energy threshold analysis of the phase I and phase II data sets of the Sudbury neutrino observatory  

Science Conference Proceedings (OSTI)

Results are reported from a joint analysis of Phase I and Phase II data from the Sudbury Neutrino Observatory. The effective electron kinetic energy threshold used is T{sub eff} = 3.5 MeV, the lowest analysis threshold yet achieved with water Cherenkov detector data. In units of 10{sup 6} cm{sup -2} s{sup =1}, the total flux of active-flavor neutrinos from {sup 8}B decay in the Sun measured using the neutral current (NC) reaction of neutrinos on deuterons, with no constraint on the {sup 8}B neutrino energy spectrum, is found to be {Phi}{sub NC} = 5.140{sub -0.158}{sup +0.160}(stat){sub -0.117}{sup +0.132}(syst). These uncertainties are more than a factor of two smaller than previously published results. Also presented are the spectra of recoil electrons from the charged current reaction of neutrinos on deuterons and the elastic scattering of electrons. A fit to the SNO data in which the free parameters directly describe the total {sup 8}B neutrino flux and the energy-dependent Ve survival probability provides a measure of the total {sup 8}B neutrino flux {Phi}{sub 8{sub B}} = 5.046{sub -0.152}{sup +0.159}(stat){sub -0.123}{sup +0.107}(syst). Combining these new results with results of all other solar experiments and the KamLAND reactor experiment yields best-fit values of the mixing parameters of {theta}{sub 12} = 34.06{sub -0.84}{sup +1.16} degrees and {Delta}m{sub 21}{sup 2} = 7.59{sub -0.21}{sup +0.20} x 10{sup -5} eV{sup 2}. The global value of {Phi}{sub 8{sub B}} is extracted to a precision of {sub -2.95}{sup +2.38}%. In a three-flavor analysis the best fit value of sin{sup 2} {theta}{sub 13} is 2.00{sub -1.63}{sup +2.09} x 10{sup -2}. Interpreting this as a limit implies an upper bound of sin{sup 2} {theta}{sub 13} < 0.057 (95% C. L.).

Seibert, S R [Los Alamos National Laboratory; Hime, A [Los Alamos National Laboratory; Elliott, S R [Los Alamos National Laboratory; Rielage, K [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

237

Physics of low energy pion production. [Threshold and 3-3 regions, cross sections, off-shell T matrix and interaction range  

SciTech Connect

Current thoughts about pion production in nucleon-nucleon collisions at threshold and into the energy region corresponding to production in the 3-3 region are briefly presented. Special emphasis is placed on the relation between the range of the interactions and the range of the off-shell t-matrix. Comparison is made between recent calculations and polarization asymmetry data.

Gibbs, W.R.

1977-01-01T23:59:59.000Z

238

Components of an algebraic solution of the multichannel problem of low-energy n-${}^{12}$C scattering plus sub-threshold (${}^{13}$C) states  

E-Print Network (OSTI)

The effects of components in an assumed model interaction potential, as well as of the order to which its deformation is taken, upon resonances in the low-energy cross sections and upon sub-threshold bound states of the compound nucleus (${}^{13}$C) are discussed.

K Amos; L. Canton; G. Pisent; J. P. Svenne; D van der Knijff

2004-03-22T23:59:59.000Z

239

Applications of a method for setting air quality standards based on epidemiological data  

SciTech Connect

A method for setting air quality standards for long-term cumulative exposures of a population based on epidemiological studies has been developed. It uses exposure estimates interpolated from monitoring stations to zip code centroids, each month applied to zip code by month residence histories of the population. Two alternative cumulative exposure indices are used--hours in excess of a threshold, and the sum of concentrations above a threshold. The indices are then used with multiple logistic regression models for the health outcome data to form dose response curves for relative risk, adjusting for covariates. These curves are useful for determination of at what exposure amounts and threshold levels, effects which have both statistical and public health significance begin to occur. The method is applied to a ten year follow-up of a sub cohort of 7,343 members of the National Cancer Institute-funded Adventist Health Study. Up to 20 years of residence history was available. Analysis for prevalence of symptoms was conducted for four air pollutants--total oxidants, sulfur dioxide, nitrogen dioxide, and total suspended particulates. For each pollutant, cumulated exposures were calculated above each of five different thresholds. Statistically significant effects were noted for total suspended particulates, total oxidants, sulfur dioxide, past and passive smoking.

Abbey, D.E.; Euler, G.L.; Moore, J.K.; Petersen, F.; Hodgkin, J.E.; Magie, A.R.

1989-04-01T23:59:59.000Z

240

Investigation of stimulated raman scattering using short-pulse diffraction limited laser beam near the instability threshold  

SciTech Connect

Short pulse laser plasma interaction experiments using diffraction limited beams provide an excellent platform to investigate the fundamental physics of Stimulated Raman Scattering. Detailed understanding of these laser plasma instabilities impacts the current inertial confinement fusion ignition designs and could potentially impact fast ignition when higher energy lasers are used with longer pulse durations ( > 1 kJ and> 1 ps). Using short laser pulses, experiments can be modeled over the entire interaction time of the laser using particle-in-cell codes to validate our understanding quantitatively. Experiments have been conducted at the Trident laser facility and the LULI (Laboratoire pour l'Utilisation des Lasers Intenses) to investigate stimulated Raman scattering near the threshold of the instability using 527 nm and 1059 nm laser light respectively with 1.5-3.0 ps pulses. In both experiments, the interaction beam was focused into a pre-ionized He gas-jet plasma. Measurements of the reflectivity as a function of intensity and k{lambda}{sub D} were completed at the Trident laser facility. At LULI, a 300 fs Thomson scattering probe is used to directly measure the density fluctuations of the driven electron plasma and ion acoustic waves. Work is currently underway comparing the results of the experiments with simulations using the VPIC [K. J. Bowers, et at., Phys. Plasmas, 15 055703 (2008)] particle-in-cell code. Details of the experimental results are presented in this manuscript.

Kline, John L [Los Alamos National Laboratory; Montgomery, David S [Los Alamos National Laboratory; Flippo, Kirk A [Los Alamos National Laboratory; Rose, Harvey A [Los Alamos National Laboratory; Yin, L [Los Alamos National Laboratory; Albright, B J [Los Alamos National Laboratory; Johnson, R P [Los Alamos National Laboratory; Shimada, T [Los Alamos National Laboratory; Bowers, K [Los Alamos National Laboratory; Rousseaux, C [CEA; Tassin, V [CEA; Baton, S D [FRANCE; Amiranoff, F [FRANCE; Hardin, R A [WEST VIRGINIA UNIV

2008-01-01T23:59:59.000Z

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


241

Quantum interferences in the $?N \\to e^+e^- N$ reaction close to the vector meson production threshold  

E-Print Network (OSTI)

The exclusive photoproduction of $e^+e^-$ pairs from nucleons close to the vector meson production threshold ($1.4electromagnetic and reflect mostly the nucleon magnetic structure. The $\\gamma N\\to e^+e^- N$ amplitudes arising from vector meson production and decay are derived from $\\gamma N\\to \\rho^0 N$ and $\\gamma N \\to \\omega N$ amplitudes supplemented by the Vector Meson Dominance assumption. The vector meson photoproduction amplitudes are calculated using a relativistic and unitary coupled-channel approach to meson-nucleon scattering. They depend sensitively on the coupling of vector fields to baryon resonances. The $\\gamma N \\to e^+e^- N$ differential cross sections display interference patterns. The interference of Bethe-Heitler pair production with vector meson $e^+e^-$ decay is quite small in the domain of validity of our model for all angles of the emitted $e^+e^-$ pair. The interference of $\\rho^0$- and $\\omega$-mesons in the $e^+e^-$ channel can be large. It is constructive for the $\\gamma p \\to e^+e^- p$ reaction and destructive for the $\\gamma n \\to e^+e^- n$ reaction. We discuss the shape and magnitude of the $e^+e^-$ pair spectra produced in the $\\gamma p \\to e^+e^- p$ and $\\gamma n \\to e^+e^- n$ reactions as functions of the pair emission angle and of the total center of mass energy $\\sqrt s$.

Matthias F. M. Lutz; Madeleine Soyeur

2005-03-31T23:59:59.000Z

242

Measurements of threshold behavior for one- and two-electron photodetachment from the H/sup -/ ion  

DOE Green Energy (OSTI)

One and two-electron photodetachment from the H/sup -/ ion by a single photon has been studied using a crossed beam apparatus. A Q-switched laser beam was directed across the 800 MeV H/sup -/ beam at LAMPF (..beta..=0.842) resulting in Doppler-shifted photon energies in the H/sup -/ barycentric frame, which were tunable from 0.4 eV to 15.5 eV by changing the intersection angle. The particles (e/sup -/, H/sup 0/, H/sup +/) resulting from photodetachment reactions were magnetically deflected into scintillation detectors allowing the total and partial cross sections for 1e/sup -/ and 2e/sup -/ processes to be separately measured. The 2e/sup -/ signal (H/sup +/) was produced by two different mechanisms, the true signal ..gamma.. + H/sup -/ ..-->.. H/sup +/ + 2e/sup -/ and the background process ..gamma.. + H/sup -/ ..-->.. H/sup 0/(n), followed by motional electric field ionization of excited H/sup 0/. Two-electron photodetachment which had been predicted theoretically was observed for the first time, and the relative cross section was measured from threshold to 15.5 eV.

Frost, C.A.

1981-09-01T23:59:59.000Z

243

Thickness effect on laser-induced-damage threshold of indium-tin oxide films at 1064 nm  

Science Conference Proceedings (OSTI)

Laser-induced-damage characteristics of commercial indium-tin oxide (ITO) films deposited by DC magnetron sputtering deposition on K9 glass substrates as a function of the film thickness have been studied at 1064 nm with a 10 ns laser pulse in the 1-on-1 mode, and the various mechanisms for thickness effect on laser-induced-damage threshold (LIDT) of the film have been discussed in detail. It is observed that laser-damage-resistance of ITO film shows dramatic thickness effect with the LIDT of the 50-nm ITO film 7.6 times as large as the value of 300 nm film, and the effect of depressed carrier density by decreasing the film thickness is demonstrated to be the primary reason. Our experiment findings indicate that searching transparent conductive oxide (TCO) film with low carrier density and high carrier mobility is an efficient technique to improve the laser-damage-resistance of TCO films based on maintaining their well electric conductivity.

Wang Haifeng; Huang Zhimeng; Zhang Dayong; Luo Fei; Huang Lixian; Li Yanglong; Luo Yongquan; Wang Weiping; Zhao Xiangjie [Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900 (China)

2011-12-01T23:59:59.000Z

244

High-energy threshold reaction rates on 0.8 GeV proton-irradiated thick Pb-target  

E-Print Network (OSTI)

This works presents results of activation-aided determination of threshold reaction rates in 92 209Bi, natPb, 197Au, 181Ta, 169Tm, natIn, 93Nb, 64Zn, 65Cu, 63Cu, 59Co, 19F, and 12C samples and in 121 27Al samples. All the samples were aligned with the proton beam axis inside and outside the demountable 92-cm thick Pb target of 15-cm diameter assembled of 23 4-cm thick discs. The samples were placed on 12 target disks to reproduce the long axis distribution of protons and neutrons. In June 2006, the target was exposed for 18 hours to a 800-MeV proton beam extracted from the ITEP U-10 accelerator. The proton fluence and the proton beam shape were determined using the 27Al(p,x)7Be monitor reaction. The reaction rates were determined by the direct gamma-spectrometry techniques. In total, 1196 gamma-spectra have been measured, and about 1500 reaction rates determined. The measured reaction rates were simulated by the MCNPX code using the following databases: ENDF/B6 for neutrons below 20 MeV, MENDL2 for 20-100 MeV neutrons, and MENDL2P for proton cross sections up to 200 MeV. An acceptable agreement of simulations with experimental data has been found.

Yu. E. Titarenko; V. F. Batyaev; A. Yu. Titarenko; M. A. Butko; K. V. Pavlov; R. S. Tikhonov; S. N. Florya; S. G. Mashnik; W. Gudowski

2007-05-08T23:59:59.000Z

245

Comparison of {sup 18}F-Fluorothymidine and {sup 18}F-Fluorodeoxyglucose PET/CT in Delineating Gross Tumor Volume by Optimal Threshold in Patients With Squamous Cell Carcinoma of Thoracic Esophagus  

SciTech Connect

Purpose: To determine the optimal method of using {sup 18}F-fluorothymidine (FLT) positron emission tomography (PET)/computed tomography (CT) simulation to delineate the gross tumor volume (GTV) in esophageal squamous cell carcinoma verified by pathologic examination and compare the results with those using {sup 18}F-fluorodeoxyglucose (FDG) PET/CT. Methods and Materials: A total of 22 patients were enrolled and underwent both FLT and FDG PET/CT. The GTVs with biologic information were delineated using seven different methods in FLT PET/CT and three different methods in FDG PET/CT. The results were compared with the pathologic gross tumor length, and the optimal threshold was obtained. Next, we compared the simulation plans using the optimal threshold of FLT and FDG PET/CT. The radiation dose was prescribed as 60 Gy in 30 fractions with a precise radiotherapy technique. Results: The mean +- standard deviation pathologic gross tumor length was 4.94 +- 2.21 cm. On FLT PET/CT, the length of the standardized uptake value 1.4 was 4.91 +- 2.43 cm. On FDG PET/CT, the length of the standardized uptake value 2.5 was 5.10 +- 2.18 cm, both of which seemed more approximate to the pathologic gross tumor length. The differences in the bilateral lung volume receiving >=20 Gy, heart volume receiving >=40 Gy, and the maximal dose received by spinal cord between FLT and FDG were not significant. However, the values for mean lung dose, bilateral lung volume receiving >=5, >=10, >=30, >=40, and >=50 Gy, mean heart dose, and heart volume receiving >=30 Gy using FLT PET/CT-based planning were significant lower than those using FDG PET/CT. Conclusion: A standardized uptake value cutoff of 1.4 on FLT PET/CT and one of 2.5 on FDG PET/CT provided the closest estimation of GTV length. Finally, FLT PET/CT-based treatment planning provided potential benefits to the lungs and heart.

Han Dali [Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Jinan, Shandong Province (China); Yu Jinming, E-mail: yujmwin@yahoo.c [Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Jinan, Shandong Province (China); Yu Yonghua; Zhang Guifang; Zhong Xiaojun; Lu Jie; Yin Yong [Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Jinan, Shandong Province (China); Fu Zheng [Department of Nuclear Medicine, Shandong Cancer Hospital and Institute, Jinan, Shandong Province (China); Mu Dianbin [Department of Pathology, Shandong Cancer Hospital and Institute, Jinan, Shandong Province (China); Zhang Baijiang [Department of Thoracic Surgery, Shandong Cancer Hospital and Institute, Jinan, Shandong Province (China); He Wei; Huo Zhijun; Liu Xijun; Kong Lei [Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Jinan, Shandong Province (China); Zhao Shuqiang [Department of Nuclear Medicine, Shandong Cancer Hospital and Institute, Jinan, Shandong Province (China); Sun Xiangyu [Department of Pathology, Shandong Cancer Hospital and Institute, Jinan, Shandong Province (China)

2010-03-15T23:59:59.000Z

246

W Mass - Threshold Momenta  

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

"transverse" plane"). References Assignments: Identifying W Project Contact: Thomas Jordan - jordant@fnal.gov Web Maintainer: qnet-webmaster@fnal.gov Last Update: January 10,...

247

Systems and methods for deactivating a matrix converter  

DOE Patents (OSTI)

Systems and methods are provided for deactivating a matrix conversion module. An electrical system comprises an alternating current (AC) interface, a matrix conversion module coupled to the AC interface, an inductive element coupled between the AC interface and the matrix conversion module, and a control module. The control module is coupled to the matrix conversion module, and in response to a shutdown condition, the control module is configured to operate the matrix conversion module to deactivate the first conversion module when a magnitude of a current through the inductive element is less than a threshold value.

Ransom, Ray M.

2013-04-02T23:59:59.000Z

248

Methods and systems for detecting abnormal digital traffic  

DOE Patents (OSTI)

Aspects of the present invention encompass methods and systems for detecting abnormal digital traffic by assigning characterizations of network behaviors according to knowledge nodes and calculating a confidence value based on the characterizations from at least one knowledge node and on weighting factors associated with the knowledge nodes. The knowledge nodes include a characterization model based on prior network information. At least one of the knowledge nodes should not be based on fixed thresholds or signatures. The confidence value includes a quantification of the degree of confidence that the network behaviors constitute abnormal network traffic.

Goranson, Craig A [Kennewick, WA; Burnette, John R [Kennewick, WA

2011-03-22T23:59:59.000Z

249

Method and apparatus for welding precipitation hardenable materials  

DOE Patents (OSTI)

A method for welding together members consisting of precipitation age hardened materials includes the steps of selecting a weld filler material that has substantially the same composition as the materials being joined, and an age hardening characteristic temperature age threshold below that of the aging kinetic temperature range of the materials being joined, whereby after welding the members together, the resulting weld and heat affected zone (HAZ) are heat treated at a temperature below that of the kinetic temperature range of the materials joined, for obtaining substantially the same mechanical characteristics for the weld and HAZ, as for the parent material of the members joined.

Murray, Jr., Holt (Hopewell, NJ); Harris, Ian D. (Dublin, OH); Ratka, John O. (Cleveland Heights, OH); Spiegelberg, William D. (Parma, OH)

1994-01-01T23:59:59.000Z

250

Method and apparatus for welding precipitation hardenable materials  

DOE Patents (OSTI)

A method for welding together members consisting of precipitation age hardened materials includes the steps of selecting a weld filler material that has substantially the same composition as the materials being joined, and an age hardening characteristic temperature age threshold below that of the aging kinetic temperature range of the materials being joined, whereby after welding the members together, the resulting weld and heat affected zone (HAZ) are heat treated at a temperature below that of the kinetic temperature range of the materials joined, for obtaining substantially the same mechanical characteristics for the weld and HAZ, as for the parent material of the members joined. 5 figures.

Murray, H. Jr.; Harris, I.D.; Ratka, J.O.; Spiegelberg, W.D.

1994-06-28T23:59:59.000Z

251

Imaging the geometrical structure of the H{sub 2}{sup +} molecular ion by high-order above-threshold ionization in an intense laser field  

Science Conference Proceedings (OSTI)

Using a frequency-domain theory, we demonstrate that an angle-resolved high-order above-threshold ionization (HATI) spectrum carries three pieces of important information: the fingerprint of the molecular wave function in the direct above-threshold-ionization amplitude, the geometrical structure of the molecule in the potential scattering between two plane waves, and the interaction between the ionized electron and the laser field, manifested in a phase factor associated with laser-assisted collisions. As a result all main interference features in the HATI spectrum can be physically explained. As an application it is pointed out that the skeleton structure of a molecule can be better imaged using lasers of higher frequencies.

Guo Yingchun [Laboratory of Optical Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080 (China); State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062 (China); Fu Panming; Wang Bingbing [Laboratory of Optical Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080 (China); Yan Zongchao [Department of Physics, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick, Canada E3B 5A3 (Canada); Center for Theoretical Atomic and Molecular Physics, Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150080 (China); Gong Jiangbin [Department of Physics and Center of Computational Science and Engineering, National University of Singapore, Singapore 117542 (Singapore)

2009-12-15T23:59:59.000Z

252

Near-threshold behavior of electron-impact excitation of He{sup +}(2s) and He{sup +}(2p)  

SciTech Connect

We present results for cross sections summed over partial waves L=0-2 for electron-impact excitation of the 2s and 2p states of He{sup +} in the energy range of 40.84 to 45.66 eV. We find that these cross sections exhibit cusps at the excitation threshold of 40.81 eV.

Xu Hao; Shakeshaft, Robin [Physics Department, University of Southern California, Los Angeles, California 90089-0484 (United States)

2011-08-15T23:59:59.000Z

253

Autonomous Correction of Sensor Data Applied to Building Technologies Utilizing Statistical Processing Methods  

Science Conference Proceedings (OSTI)

Autonomous detection and correction of potentially missing or corrupt sensor data is a essential concern in building technologies since data availability and correctness is necessary to develop accurate software models for instrumented experiments. Therefore, this paper aims to address this problem by using statistical processing methods including: (1) least squares; (2) maximum likelihood estimation; (3) segmentation averaging; and (4) threshold based techniques. Application of these validation schemes are applied to a subset of data collected from Oak Ridge National Laboratory s (ORNL) ZEBRAlliance research project, which is comprised of four single-family homes in Oak Ridge, TN outfitted with a total of 1,218 sensors. The focus of this paper is on three different types of sensor data: (1) temperature; (2) humidity; and (3) energy consumption. Simulations illustrate the threshold based statistical processing method performed best in predicting temperature, humidity, and energy data.

Castello, Charles C [ORNL; New, Joshua Ryan [ORNL

2012-01-01T23:59:59.000Z

254

DAKOTA reliability methods applied to RAVEN/RELAP-7.  

SciTech Connect

This report summarizes the result of a NEAMS project focused on the use of reliability methods within the RAVEN and RELAP-7 software framework for assessing failure probabilities as part of probabilistic risk assessment for nuclear power plants. RAVEN is a software tool under development at the Idaho National Laboratory that acts as the control logic driver and post-processing tool for the newly developed Thermal-Hydraulic code RELAP-7. Dakota is a software tool developed at Sandia National Laboratories containing optimization, sensitivity analysis, and uncertainty quantification algorithms. Reliability methods are algorithms which transform the uncertainty problem to an optimization problem to solve for the failure probability, given uncertainty on problem inputs and a failure threshold on an output response. The goal of this work is to demonstrate the use of reliability methods in Dakota with RAVEN/RELAP-7. These capabilities are demonstrated on a demonstration of a Station Blackout analysis of a simplified Pressurized Water Reactor (PWR).

Swiler, Laura Painton; Mandelli, Diego [Idaho National Laboratory, Idaho Falls, ID; Rabiti, Cristian [Idaho National Laboratory, Idaho Falls, ID; Alfonsi, Andrea [Idaho National Laboratory, Idaho Falls, ID

2013-09-01T23:59:59.000Z

255

Announcing Amended Methods  

Science Conference Proceedings (OSTI)

Amended records are those methods with changes published after the official printing date of September 1st, 2011 Announcing Amended Methods Official Methods and Recommended Practices of the AOCS (Methods) aocs applicants certified chemist chemists

256

Nuclear Analytical Methods  

Science Conference Proceedings (OSTI)

... Nuclear Analytical Methods. Research activities in the Nuclear Analytical Methods Group are focused on the science that ...

257

Nuclear Instruments and Methods in Physics Research A 513 (2003) 585595 The RPI multiplicity detector response to g-ray cascades  

E-Print Network (OSTI)

Nuclear Instruments and Methods in Physics Research A 513 (2003) 585­595 The RPI multiplicity's Republic of China b Department of Mechanical, Aerospace and Nuclear Engineering, Rensselear Polytechnic and the decay properties of the compound nuclear levels at excitations near the threshold for neutron emission

Danon, Yaron

258

AN EXPERIMENTAL STUDY OF RETINAL BURNS: PART I. THE IRRADIANCE THRESHOLDS FOR CHORIO-RETINAL LESIONS. PART II. ENTOPTIC SCATTER AS A FUNCTION OF WAVE LENGTH  

SciTech Connect

Using a high intensity light source to produce chorioretinal lesions in the eyes of rabbits, cats, and guinea pigs, the authors determined, at different levels of retinal irradiance, the exposure time which produced an ophthalmoscopically visible lesion. It was found that, at irradiance levels greater than 2 cal/cm/sup 2/sec, a radiant exposure of 1.0 cal/cm/sup 2/ produced a threshold lesion. At irradiance levels less than 0.7 cal/cm/sup 2//sec, lesions could not be produced at any exposure time through ten seconds. Histological data on the nature of the legions and course of healing are presented and discussed. (auth)

Demott, D.W.; Davis, T.P.

1959-05-11T23:59:59.000Z

259

Method for nonlinear optimization for gas tagging and other systems  

DOE Patents (OSTI)

A method and system are disclosed for providing nuclear fuel rods with a configuration of isotopic gas tags. The method includes selecting a true location of a first gas tag node, selecting initial locations for the remaining n-1 nodes using target gas tag compositions, generating a set of random gene pools with L nodes, applying a Hopfield network for computing on energy, or cost, for each of the L gene pools and using selected constraints to establish minimum energy states to identify optimal gas tag nodes with each energy compared to a convergence threshold and then upon identifying the gas tag node continuing this procedure until establishing the next gas tag node until all remaining n nodes have been established. 6 figs.

Chen, T.; Gross, K.C.; Wegerich, S.

1998-01-06T23:59:59.000Z

260

Method for nonlinear optimization for gas tagging and other systems  

DOE Patents (OSTI)

A method and system for providing nuclear fuel rods with a configuration of isotopic gas tags. The method includes selecting a true location of a first gas tag node, selecting initial locations for the remaining n-1 nodes using target gas tag compositions, generating a set of random gene pools with L nodes, applying a Hopfield network for computing on energy, or cost, for each of the L gene pools and using selected constraints to establish minimum energy states to identify optimal gas tag nodes with each energy compared to a convergence threshold and then upon identifying the gas tag node continuing this procedure until establishing the next gas tag node until all remaining n nodes have been established.

Chen, Ting (Chicago, IL); Gross, Kenny C. (Bolingbrook, IL); Wegerich, Stephan (Glendale Heights, IL)

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "bispectral threshold method" 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

Terrace-like structure in the above-threshold ionization spectrum of an atom in an IR+XUV two-color laser field  

E-Print Network (OSTI)

Based on the frequency-domain theory, we investigate the above-threshold ionization (ATI) process of an atom in a two-color laser field with infrared (IR) and extreme ultraviolet (XUV) frequencies, where the photon energy of the XUV laser is close to or larger than the atomic ionization threshold. By using the channel analysis, we find that the two laser fields play different roles in an ionization process, where the XUV laser determines the ionization probability by the photon number that the atom absorbs from it, while the IR laser accelerates the ionized electron and hence widens the electron kinetic energy spectrum. As a result, the ATI spectrum presents a terrace-like structure. By using the saddle-point approximation, we obtain a classical formula which can predict the cutoff of each plateau in the terrace-like ATI spectrum. Furthermore, we find that the difference of the heights between two neighboring plateaus in the terrace-like structure of the ATI spectrum increases as the frequency of the XUV lase...

Zhang, Kui; Fu, Panming; Yan, Zong-Chao; Wang, Bingbing

2013-01-01T23:59:59.000Z

262

Measurement of cross sections of p(e,e'pi^+)n for near pion threshold and high-lying resonances at high Q^2  

Science Conference Proceedings (OSTI)

During the last decade, remarkable experimental data have been collected in an extensive programs to study the excitation of nucleon resonance (N*) at Jefferson Laboratory through pion electroproduction using polarized electron beam and unpolarized proton target. The CEBAF Large Acceptance Spectrometer (CLAS) is well suited for the study of a broad range of kinematics in the invariant mass W and photon virtuality Q{sup 2} with nearly complete angular coverage for the hadronic decays. Electron scattering allows us to probe the effective degrees of freedom in excited nucleon states from meson-baryon to dressed quarks in terms of varying the distance scale. The study of nucleon structure allows us to understand these effective degrees of freedom. In this proceeding, I present preliminary cross sections for single pion production in mass range of high-lying resonances as well as near the pion threshold. Analysis of N{pi}{sup +} cross sections together with N{pi}{sup 0} and N {pi}{pi} exclusive electroproduction data, will allow us for the first time to determine electrocouplings of several high-lying excited proton states (W {ge} 1.6 GeV) at photon virtualities that correspond to the transition toward the dominance of quark degrees of freedom. I also present preliminary result on the E{sub 0+} multipole near pion threshold at 2.0 GeV{sup 2} {le} Q{sup 2} {le} 4.5 GeV{sup 2} using exclusive N{pi}{sup +} electroproduction data.

Kijun Park

2012-04-01T23:59:59.000Z

263

ECT-Test-Methods  

Science Conference Proceedings (OSTI)

ECT-Test-Methods. A, B, C, D. 1, NVLAP ECT Test Method Selection List (updated 2013-12-02). 2, 3, Standard Category, Test ...

2013-12-02T23:59:59.000Z

264

Methods to Manufacture Cermets  

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

Manufacture Cermets Methods to Manufacture Cermets There are many methods to manufacture cermets. One option is shown here. DU dioxide and steel powder are mixed, the mixture is...

265

Synchrotron Methods Staff  

Science Conference Proceedings (OSTI)

... Determination Staff; Materials Measurement Science Division Staff Directory; MML Organization. Contact. Synchrotron Methods ...

2012-10-07T23:59:59.000Z

266

Radiation damage to amorphous carbon thin films irradiated by multiple 46.9 nm laser shots below the single-shot damage threshold  

SciTech Connect

High-surface-quality amorphous carbon (a-C) optical coatings with a thickness of 45 nm, deposited by magnetron sputtering on a silicon substrate, were irradiated by the focused beam of capillary-discharge Ne-like Ar extreme ultraviolet laser (CDL=capillary-discharge laser; XUV=extreme ultraviolet, i.e., wavelengths below 100 nm). The laser wavelength and pulse duration were 46.9 nm and 1.7 ns, respectively. The laser beam was focused onto the sample surface by a spherical Sc/Si multilayer mirror with a total reflectivity of about 30%. The laser pulse energy was varied from 0.4 to 40 muJ on the sample surface. The irradiation was carried out at five fluence levels between 0.1 and 10 J/cm{sup 2}, accumulating five different series of shots, i.e., 1, 5, 10, 20, and 40. The damage to the a-C thin layer was investigated by atomic force microscopy (AFM) and Nomarski differential interference contrast (DIC) optical microscopy. The dependence of the single-shot-damaged area on pulse energy makes it possible to determine a beam spot diameter in the focus. Its value was found to be equal to 23.3+-3.0 mum using AFM data, assuming the beam to have a Gaussian profile. Such a plot can also be used for a determination of single-shot damage threshold in a-C. A single-shot threshold value of 1.1 J/cm{sup 2} was found. Investigating the consequences of the multiple-shot exposure, it has been found that an accumulation of 10, 20, and 40 shots at a fluence of 0.5 J/cm{sup 2}, i.e., below the single-shot damage threshold, causes irreversible changes of thin a-C layers, which can be registered by both the AFM and the DIC microscopy. In the center of the damaged area, AFM shows a-C removal to a maximum depth of 0.3, 1.2, and 1.5 nm for 10-, 20- and 40-shot exposure, respectively. Raman microprobe analysis does not indicate any change in the structure of the remaining a-C material. The erosive behavior reported here contrasts with the material expansion observed earlier [L. Juha et al., Proc. SPIE 5917, 91 (2005)] on an a-C sample irradiated by a large number of femtosecond pulses of XUV high-order harmonics.

Juha, L.; Hajkova, V.; Vorlicek, V. [Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21 Prague 8 (Czech Republic); Chalupsky, J. [Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21 Prague 8 (Czech Republic); Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Brehova 7, 115 19 Prague 1 (Czech Republic); Ritucci, A.; Reale, A.; Zuppella, P. [Department of Physics, University of L'Aquila, gc Laboratorio Nazionale del Gran Sasso (Istituto Nazionale di Fisica Nucleare-INFN), 67010 Coppito, L'Aquila (Italy); Stoermer, M. [GKSS Research Center, Max-Planck-Strasse 1, D-21502 Geesthacht (Germany)

2009-05-01T23:59:59.000Z

267

Method for enhanced control of welding processes  

DOE Patents (OSTI)

Method and system for producing high quality welds in welding processes, in general, and gas tungsten arc (GTA) welding, in particular by controlling weld penetration. Light emitted from a weld pool is collected from the backside of a workpiece by optical means during welding and transmitted to a digital video camera for further processing, after the emitted light is first passed through a short wavelength pass filter to remove infrared radiation. By filtering out the infrared component of the light emitted from the backside weld pool image, the present invention provides for the accurate determination of the weld pool boundary. Data from the digital camera is fed to an imaging board which focuses on a 100.times.100 pixel portion of the image. The board performs a thresholding operation and provides this information to a digital signal processor to compute the backside weld pool dimensions and area. This information is used by a control system, in a dynamic feedback mode, to automatically adjust appropriate parameters of a welding system, such as the welding current, to control weld penetration and thus, create a uniform weld bead and high quality weld.

Sheaffer, Donald A. (Livermore, CA); Renzi, Ronald F. (Tracy, CA); Tung, David M. (Livermore, CA); Schroder, Kevin (Pleasanton, CA)

2000-01-01T23:59:59.000Z

268

Second moment method for a family of boolean CSP  

E-Print Network (OSTI)

The estimation of phase transitions in random boolean Constraint Satisfaction Problems (CSP) is based on two fundamental tools: the first and second moment methods. While the first moment method on the number of solutions permits to compute upper bounds on any boolean CSP, the second moment method used for computing lower bounds proves to be more tricky and in most cases gives only the trivial lower bound 0. In this paper, we define a subclass of boolean CSP covering the monotone versions of many known NP-Complete boolean CSPs. We give a method for computing non trivial lower bounds for any member of this subclass. This is achieved thanks to an application of the second moment method to some selected solutions called characteristic solutions that depend on the boolean CSP considered. We apply, as an example, this method to establish that the threshold r_{k} of monotone 1-in-k-SAT is \\log k/k\\leq r_{k}\\leq\\log^{2}k/k

Boufkhad, Yacine

2011-01-01T23:59:59.000Z

269

MODIFIED ZONE METHOD CALCULATOR  

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

Zone Method is recommended for R-value calculations in steel stud walls by the 1997 ASHRAE Handbook of Fundamentals ASHRAE 1997. The Modified Zone Method is similar to the...

270

Fourier transform method for imaging atmospheric Cherenkov telescopes  

E-Print Network (OSTI)

We propose Fourier transform (FT) method for processing images of extensive air showers (EAS) detected by imaging atmospheric Cherenkov telescopes (IACT) used in the very high energy (VHE) gamma-ray astronomy. The method is based on the discrete Fourier transforms (DFT) on compact Lie groups, and the use of continuous extension of the inverse discrete transforms to approximate the discrete EAS images by continuous EAS brightness distribution functions. Here we describe the FT-method in case of SU(3) group. It allows practical realization of the DFT technique for functions sampled on hexagonal symmetry grids. The proposed method can also be implemented in case of IACT cameras with grids of rectangular symmetry by using the DFT on the SU(2)xSU(2) group. The proposed FT-method is applied to the Monte-Carlo simulated bank of TeV proton and gamma-ray EAS images for a stand-alone telescope. Comparing between the FT-method and the currently used standard method shows that the FT technique allows a better and systematic enhancement of the gamma-ray signal. The relative difference between these two methods becomes more profound especially for `photon poor' images. It suggests that the EAS detection thresholds of IACTs could be effectively reduced with the use of FT technique. This prediction is further supported by a significant noise suppression capability of the method using simple low-pass filters in the image frequency domain. The FT-method allows very deep `tail' (and `height') image cuts, differentiation of images, operations in the image frequency domain, etc., that can be used for development of new effective parameters for the EAS image processing.

A. Atoyan; J. Patera; V. Sahakian; A. Akpherjanian

2004-09-15T23:59:59.000Z

271

Cooperative method development  

Science Conference Proceedings (OSTI)

The development of methods tools and process improvements is best to be based on the understanding of the development practice to be supported. Qualitative research has been proposed as a method for understanding the social and cooperative aspects of ... Keywords: Cooperative method development, D.2.9 [Software]: Software Engineering --- Management, Empirical research, Human factors, Research methodology, Software engineering

Yvonne Dittrich; Kari Rönkkö; Jeanette Eriksson; Christina Hansson; Olle Lindeberg

2008-06-01T23:59:59.000Z

272

Combustible structural composites and methods of forming combustible structural composites  

DOE Patents (OSTI)

Combustible structural composites and methods of forming same are disclosed. In an embodiment, a combustible structural composite includes combustible material comprising a fuel metal and a metal oxide. The fuel metal is present in the combustible material at a weight ratio from 1:9 to 1:1 of the fuel metal to the metal oxide. The fuel metal and the metal oxide are capable of exothermically reacting upon application of energy at or above a threshold value to support self-sustaining combustion of the combustible material within the combustible structural composite. Structural-reinforcing fibers are present in the composite at a weight ratio from 1:20 to 10:1 of the structural-reinforcing fibers to the combustible material. Other embodiments and aspects are disclosed.

Daniels, Michael A. (Idaho Falls, ID); Heaps, Ronald J. (Idaho Falls, ID); Steffler, Eric D (Idaho Falls, ID); Swank, William D. (Idaho Falls, ID)

2011-08-30T23:59:59.000Z

273

Method of degrading trinitrotoluene  

DOE Patents (OSTI)

A method of eluting trinitrotoluene (TNT) from soil using a dispersant from bacterial intra-amoebic isolate 1s, ATCC 75229.

Tyndall, Richard L. (Clinton, TN); Vass, Arpad (Oak Ridge, TN)

1996-01-01T23:59:59.000Z

274

Method and apparatus for effecting light-off of a catalytic converter in a hybrid powertrain system  

SciTech Connect

A powertrain system includes a hybrid transmission and an internal combustion engine coupled to an exhaust aftertreatment device. A method for operating the powertrain system includes operating the hybrid transmission to generate tractive torque responsive to an operator torque request with the internal combustion engine in an engine-off state so long as the tractive torque is less than a threshold. The internal combustion engine is operated in an engine-on state at preferred operating conditions to effect light-off of the exhaust aftertreatment device and the hybrid transmission is coincidentally operated to generate tractive torque responsive to the operator torque request when the operator torque request exceeds the threshold. The internal combustion engine is then operated in the engine-on state to generate tractive torque responsive to the operator torque request.

Roos, Bryan Nathaniel; Spohn, Brian L

2013-07-02T23:59:59.000Z

275

Search method for coincident events from LIGO and IceCube detectors  

E-Print Network (OSTI)

We present a coincidence search method for astronomical events using gravitational wave detectors in conjunction with other astronomical observations. We illustrate our method for the specific case of LIGO gravitational wave detector and the IceCube neutrino detector. Event triggers which appear in both detectors within a certain time window are selected as time coincident events. Then the spatial overlap of reconstructed event directions is evaluated by an unbinned maximum likelihood method. Our method was tested by Monte Carlo simulations using simulated LIGO and IceCube events. We estimated a typical false alarm rate of the analysis to be 1 event per 435 years. This would allow us to relax the event trigger thresholds of the individual detectors and improve the detection capability.

Aso, Yoichi; Finley, Chad; Dwyer, John; Kotake, Kei; Marka, Szabolcs

2007-01-01T23:59:59.000Z

276

Systems and methods for commutating inductor current using a matrix converter  

DOE Patents (OSTI)

Systems and methods are provided for delivering current using a matrix converter in a vehicle. An electrical system comprises an AC interface, a first conversion module coupled to the AC interface, an inductive element coupled between the AC interface and the first conversion module, and a control module coupled to the first conversion module. The control module is configured to operate the first conversion module in a bidirectional operating mode to commutate current bidirectionally. When a magnitude of the current through the inductive element is greater than a first threshold value, the control module operates the conversion module in a unidirectional operating mode, wherein current is commutated unidirectionally.

Ransom, Ray M; Kajouke, Lateef A; Perisic, Milun

2012-10-16T23:59:59.000Z

277

Methods for data classification  

DOE Patents (OSTI)

The present invention provides methods for classifying data and uncovering and correcting annotation errors. In particular, the present invention provides a self-organizing, self-correcting algorithm for use in classifying data. Additionally, the present invention provides a method for classifying biological taxa.

Garrity, George (Okemos, MI); Lilburn, Timothy G. (Front Royal, VA)

2011-10-11T23:59:59.000Z

278

Water treatment method  

DOE Patents (OSTI)

A method for reducing the concentration of any undesirable metals dissolved in contaminated water, such as waste water. The method involves uniformly reacting the contaminated water with an excess amount of solid particulate calcium sulfite to insolubilize the undesirable metal ions, followed by removal thereof and of the unreacted calcium sulfite.

Martin, Frank S. (Farmersville, OH); Silver, Gary L. (Centerville, OH)

1991-04-30T23:59:59.000Z

279

Water treatment method  

DOE Patents (OSTI)

A method for reducing the concentration of many undesirable metals dissolved in contaminated water, such as waste water. The method involves uniformly reacting the contaminated water with an excess amount of solid particulate calcium sulfite to insolubilize the undesirable metal ions, followed by removal thereof and of the unreacted calcium sulfite. 1 tab.

Martin, F.S.; Silver, G.L.

1990-02-02T23:59:59.000Z

280

Water treatment method  

DOE Patents (OSTI)

A method is described for reducing the concentration of any undesirable metals dissolved in contaminated water, such as waste water. The method involves uniformly reacting the contaminated water with an excess amount of solid particulate calcium sulfite to insolubilize the undesirable metal ions, followed by removal thereof and of the unreacted calcium sulfite.

Martin, F.S.; Silver, G.L.

1991-04-30T23:59:59.000Z

Note: This page contains sample records for the topic "bispectral threshold method" 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

Measurement of the solar 8B neutrino rate with a liquid scintillator target and 3 MeV energy threshold in the Borexino detector  

E-Print Network (OSTI)

We report the measurement of electron neutrino elastic scattering from 8B solar neutrinos with 3 MeV energy threshold by the Borexino detector in Gran Sasso (Italy). The rate of solar neutrino-induced electron scattering events above this energy in Borexino is 0.217 +- 0.038 (stat) +- 0.008 (syst) cpd/100 t, which corresponds to the equivalent unoscillated flux of (2.4 +- 0.4 (stat) +- 0.1 (syst))x10^6 cm^-2 s^-1, in good agreement with measurements from SNO and SuperKamiokaNDE. Assuming the 8B neutrino flux predicted by the high metallicity Standard Solar Model, the average 8B neutrino survival probability above 3 MeV is measured to be 0.29+-0.10. The survival probabilities for 7Be and 8B neutrinos as measured by Borexino differ by 1.9 sigma. These results are consistent with the prediction of the MSW-LMA solution of a transition in the solar electron neutrino survival probability between the low energy vacuum-driven and the high-energy matter-enhanced solar neutrino oscillation regimes.

The Borexino Collaboration

2008-08-21T23:59:59.000Z

282

Catalytic reforming methods  

DOE Patents (OSTI)

A catalytic reforming method is disclosed herein. The method includes sequentially supplying a plurality of feedstocks of variable compositions to a reformer. The method further includes adding a respective predetermined co-reactant to each of the plurality of feedstocks to obtain a substantially constant output from the reformer for the plurality of feedstocks. The respective predetermined co-reactant is based on a C/H/O atomic composition for a respective one of the plurality of feedstocks and a predetermined C/H/O atomic composition for the substantially constant output.

Tadd, Andrew R; Schwank, Johannes

2013-05-14T23:59:59.000Z

283

Method for inducing hypothermia  

DOE Patents (OSTI)

Systems for phase-change particulate slurry cooling equipment and methods to induce hypothermia in a patient through internal and external cooling are provided. Subcutaneous, intravascular, intraperitoneal, gastrointestinal, and lung methods of cooling are carried out using saline ice slurries or other phase-change slurries compatible with human tissue. Perfluorocarbon slurries or other slurry types compatible with human tissue are used for pulmonary cooling. And traditional external cooling methods are improved by utilizing phase-change slurry materials in cooling caps and torso blankets.

Becker, Lance B. (Chicago, IL); Hoek, Terry Vanden (Chicago, IL); Kasza, Kenneth E. (Palos Park, IL)

2003-04-15T23:59:59.000Z

284

Method for inducing hypothermia  

DOE Patents (OSTI)

Systems for phase-change particulate slurry cooling equipment and methods to induce hypothermia in a patient through internal and external cooling are provided. Subcutaneous, intravascular, intraperitoneal, gastrointestinal, and lung methods of cooling are carried out using saline ice slurries or other phase-change slurries compatible with human tissue. Perfluorocarbon slurries or other slurry types compatible with human tissue are used for pulmonary cooling. And traditional external cooling methods are improved by utilizing phase-change slurry materials in cooling caps and torso blankets.

Becker, Lance B. (Chicago, IL); Hoek, Terry Vanden (Chicago, IL); Kasza, Kenneth E. (Palos Park, IL)

2008-09-09T23:59:59.000Z

285

Fire PRA Methods Enhancements  

Science Conference Proceedings (OSTI)

This report describes research on fire probabilistic risk assessment PRA methods. The fire PRA methods presented in this report provide additions, clarifications, and refinements to the methods proposed in 2005 by the Electric Power Research Institute EPRI and the U.S. Nuclear Regulatory Commission NRC in EPRI/NRC-RES Fire PRA Methodology for Nuclear Power Facilities EPRI 1011989/NUREG/CR-6850. The purpose of the current report is to provide the most current, state-of-the-art information in order to supp...

2008-12-23T23:59:59.000Z

286

Threshold effects in charm hadroproduction.  

E-Print Network (OSTI)

in part by the Division of Nuclear Physics of the Office of High Energy and Nuclear Physics of the U.S. Department of Energy under Contract No. DE-AC-03-76SF00098. References [1] M.C. Abreu et al. (NA50 Collab.), Eur. Phys. J. C14, 443 (2000). [2] L... Cavendish Laboratory University of Cambridge, Cambridge CB3 0HE, UK bNIKHEF Theory Group P.O. Box 41882, 1009 DB Amsterdam, The Netherlands and Institute for Theoretical Physics Utrecht University, Utrecht, The Netherlands cDeutsches Elektronensynchrotron DESY...

Kidonakis, Nikolaos; Laenen, Eric; Moch, Sven; Vogt, Ramona

287

Policy Analysis Determining Thresholds for  

E-Print Network (OSTI)

.; Minami, K. Clim. Change 1998, 40, 7-38. (18) U.S. EPA. E-GRID2000, Plant File, v. 2.0; U.S. Environmental Protection Agency, Clean Air Market Programs: Washington, DC, 2000 [available at http://www.epa.gov/airmarkets/egrid

288

Sommerfeld radiation condition at threshold  

E-Print Network (OSTI)

We prove Besov space bounds of the resolvent at low energies in any dimension for a class of potentials that are negative and obey a virial condition with these conditions imposed at infinity only. We do not require spherical symmetry. The class of potentials includes in dimension $\\geq3$ the attractive Coulomb potential. There are two boundary values of the resolvent at zero energy which we characterize by radiation conditions. These radiation conditions are zero energy versions of the well-known Sommerfeld radiation condition.

Erik Skibsted

2011-06-23T23:59:59.000Z

289

Threshold values of autoresonant pumping  

E-Print Network (OSTI)

There exists stable growing solution of primary resonant equation for a autoresonant pumping with decreasing amplitude. The primary term of asymptotics is $O(\\sqrt{t})$ and does not depend on order of the force from some interval. We point to the interval for the amplitude of the pumping for which the growing stable solution exists.

O. M. Kiselev

2013-03-19T23:59:59.000Z

290

Method for making organyltriorganooxysilanes  

DOE Patents (OSTI)

A method for the preparation of organyltriorganooxysilanes containing at least one silicon-carbon bond is provided comprising reacting at least one tetraorganooxysilane with an activated carbon and at least one base.

Schattenmann, Florian Johannes (Ballston Lake, NY)

2002-01-01T23:59:59.000Z

291

PARTICLE SEPARATION METHOD  

DOE Patents (OSTI)

An improved method of sedimentation is described. A series of spaced surfaces of powdered material positioned normal to the centrifugal field concentrates the larger, slower moving molecules of a liquid and hastens sedimentation. (AEC)

Anderson, N.G.

1963-01-29T23:59:59.000Z

292

Formal computations and methods  

Science Conference Proceedings (OSTI)

We present formal verification methods and procedures for finding bounds of linear programs and proving nonlinear inequalities. An efficient implementation of formal arithmetic computations is also described. Our work is an integral part of the Flyspeck ...

Alexey Solovyev / Thomas C. Hales

2012-01-01T23:59:59.000Z

293

Method for synthesizing boracities  

DOE Patents (OSTI)

A method for producing boracites is disclosed in which a solution of divalent metal acetate, boric acid, and halogen acid is evaporated to dryness and the resulting solid is heated in an inert atmosphere under pressure.

Wolf, Gary A. (Kennewick, WA)

1982-01-01T23:59:59.000Z

294

Subcell Remapping Method  

National Nuclear Security Administration (NNSA)

Subcell Subcell Remapping Method on Staggered Polygonal Grids for Arbitrary Lagrangian-Eulerian Methods Mikhail Shashkov T-7, LANL, shashkov@lanl.gov webpage: cnls.lanl.gov/∼ shashkov Raphael Loubere, T-7, LANL This work was performed under the auspices of the US Department of Energy at Los Alamos National Laboratory, under contract W-7405-ENG-36. The authors acknowledge the partial support of the ASC-ASCI Program at LANL and MICS DOE/ASCR Program in the Applied Mathematical Sciences 1 Outline * Arbitrary Lagrangian-Eulerian (ALE) Methods * Lagrangian Stage - Discretization, Subcell forces, Artificial Viscosity * Rezone Stage - Reference Jacobian Strategy, Untangling * Staggered Remap - Statement, Requirements and Main Stages - Gathering Stage - Subcell Remapping Stage - Scattering Stage - Numerical Examples * References 2 Arbitrary Lagrangian-Eulerian (ALE) Methods

295

Method of treating depression  

DOE Patents (OSTI)

Methods for treatment of depression-related mood disorders in mammals, particularly humans are disclosed. The methods of the invention include administration of compounds capable of enhancing glutamate transporter activity in the brain of mammals suffering from depression. ATP-sensitive K.sup.+ channel openers and .beta.-lactam antibiotics are used to enhance glutamate transport and to treat depression-related mood disorders and depressive symptoms.

Henn, Fritz (East Patchogue, NY)

2012-01-24T23:59:59.000Z

296

Method of treating depression  

DOE Patents (OSTI)

Methods for treatment of depression-related mood disorders in mammals, particularly humans are disclosed. The methods of the invention include administration of compounds capable of enhancing glutamate transporter activity in the brain of mammals suffering from depression. ATP-sensitive K.sup.+ channel openers and .beta.-lactam antibiotics are used to enhance glutamate transport and to treat depression-related mood disorders and depressive symptoms.

Henn, Fritz

2013-04-09T23:59:59.000Z

297

IRRADIATION METHOD AND APPARATUS  

DOE Patents (OSTI)

A method and apparatus are described for changing fuel bodies into a process tube of a reactor. According to this method fresh fuel elements are introduced into one end of the tube forcing used fuel elements out the other end. When sufficient fuel has been discharged, a reel and tape arrangement is employed to pull the column of bodies back into the center of the tube. Due provision is made for providing shielding in the tube. (AEC)

Cabell, C.P.

1962-12-18T23:59:59.000Z

298

Method of saccharifying cellulose  

DOE Patents (OSTI)

A method is disclosed of saccharifying cellulose by incubation with the cellulase of Clostridium thermocellum in a broth containing an efficacious amount of thiol reducing agent. Other incubation parameters which may be advantageously controlled to stimulate saccharification include the concentration of alkaline earth salts, pH, temperature, and duration. By the method of the invention, even native crystalline cellulose such as that found in cotton may be completely saccharified.

Johnson, E.A.; Demain, A.L.; Madia, A.

1983-05-13T23:59:59.000Z

299

Geophysical Methods | Open Energy Information  

Open Energy Info (EERE)

Geophysical Methods Geophysical Methods Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Geophysical Methods Details Activities (0) Areas (0) Regions (0) NEPA(1) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Geophysical Techniques Parent Exploration Technique: Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Geophysical Methods: Methods used to measure the physical properties of the earth Other definitions:Wikipedia Reegle Introduction There are five main types of geophysical methods used for geothermal resource discovery: Seismic Methods (active and passive) Electrical Methods Magnetic Methods Gravity Methods Radiometric Methods Seismic methods dominates oil and gas exploration, and probably accounts

300

Methods | Transparent Cost Database  

Open Energy Info (EERE)

Methods Methods Disclaimer The data gathered here are for informational purposes only. Inclusion of a report in the database does not represent approval of the estimates by DOE or NREL. Levelized cost calculations DO NOT represent real world market conditions. The calculation uses a single discount rate in order to compare technology costs only. About the Cost Database For emerging energy technologies, a variety of cost and performance numbers are cited in presentations and reports for present-day characteristics and potential improvements. Amid a variety of sources and methods for these data, the Office of Energy Efficiency and Renewable Energy's technology development programs determine estimates for use in program planning. The Transparent Cost Database collects program cost and performance

Note: This page contains sample records for the topic "bispectral threshold method" 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

Method of grid generation  

DOE Patents (OSTI)

The present invention provides a method of grid generation that uses the geometry of the problem space and the governing relations to generate a grid. The method can generate a grid with minimized discretization errors, and with minimal user interaction. The method of the present invention comprises assigning grid cell locations so that, when the governing relations are discretized using the grid, at least some of the discretization errors are substantially zero. Conventional grid generation is driven by the problem space geometry; grid generation according to the present invention is driven by problem space geometry and by governing relations. The present invention accordingly can provide two significant benefits: more efficient and accurate modeling since discretization errors are minimized, and reduced cost grid generation since less human interaction is required.

Barnette, Daniel W. (Veguita, NM)

2002-01-01T23:59:59.000Z

302

Unorthodox theoretical methods  

SciTech Connect

The use of the ReaxFF force field to correlate with NMR mobilities of amine catalytic substituents on a mesoporous silica nanosphere surface is considered. The interfacing of the ReaxFF force field within the Surface Integrated Molecular Orbital/Molecular Mechanics (SIMOMM) method, in order to replicate earlier SIMOMM published data and to compare with the ReaxFF data, is discussed. The development of a new correlation consistent Composite Approach (ccCA) is presented, which incorporates the completely renormalized coupled cluster method with singles, doubles and non-iterative triples corrections towards the determination of heats of formations and reaction pathways which contain biradical species.

Nedd, Sean

2012-06-20T23:59:59.000Z

303

Coating method for graphite  

DOE Patents (OSTI)

A method of limiting carbon contamination from graphite ware used in induction melting of uranium alloys is provided. The graphite surface is coated with a suspension of Y/sub 2/O/sub 3/ particles in water containing about 1.5 to 4 percent by weight sodium carboxymethylcellulose.

Banker, J.G.; Holcombe, C.E. Jr.

1975-11-06T23:59:59.000Z

304

Heart imaging method  

DOE Patents (OSTI)

A method for providing an image of the human heart's electrical system derives time-of-flight data from an array of EKG electrodes and this data is transformed into phase information. The phase information, treated as a hologram, is reconstructed to provide an image in one or two dimensions of the electrical system of the functioning heart.

Collins, H. Dale (Richland, WA); Gribble, R. Parks (Richland, WA); Busse, Lawrence J. (Littleton, CO)

1991-01-01T23:59:59.000Z

305

Sampling system and method  

DOE Patents (OSTI)

The present disclosure provides an apparatus and method for coupling conduit segments together. A first pump obtains a sample and transmits it through a first conduit to a reservoir accessible by a second pump. The second pump further conducts the sample from the reservoir through a second conduit.

Decker, David L.; Lyles, Brad F.; Purcell, Richard G.; Hershey, Ronald Lee

2013-04-16T23:59:59.000Z

306

Cooling load estimation methods  

DOE Green Energy (OSTI)

Ongoing research on quantifying the cooling loads in residential buildings, particularly buildings with passive solar heating systems, is described. Correlations are described that permit auxiliary cooling estimates from monthly average insolation and weather data. The objective of the research is to develop a simple analysis method, useful early in design, to estimate the annual cooling energy required of a given building.

McFarland, R.D.

1984-01-01T23:59:59.000Z

307

Hydraulic mining method  

DOE Patents (OSTI)

A hydraulic mining method includes drilling a vertical borehole into a pitched mineral vein and a slant borehole along the footwall of the vein to intersect the vertical borehole. Material is removed from the mineral vein by a fluid jet stream and the resulting slurry flows down the footwall borehole into the vertical borehole from where it is pumped upwardly therethrough to the surface.

Huffman, L.H.; Knoke, G.S.

1984-06-15T23:59:59.000Z

308

Biomass treatment method  

DOE Patents (OSTI)

A method for treating biomass was developed that uses an apparatus which moves a biomass and dilute aqueous ammonia mixture through reaction chambers without compaction. The apparatus moves the biomass using a non-compressing piston. The resulting treated biomass is saccharified to produce fermentable sugars.

Friend, Julie (Claymont, DE); Elander, Richard T. (Evergreen, CO); Tucker, III; Melvin P. (Lakewood, CO); Lyons, Robert C. (Arvada, CO)

2010-10-26T23:59:59.000Z

309

Methods Of Making Pyrrolidones  

DOE Patents (OSTI)

The present invention provides methods for making N-methylpyrrolidine and analogous compounds via hydrogenation. Novel catalysts for this process, and novel conditions/yields are also described. Other process improvements may include extraction and hydrolysis steps. Some preferred reactions take place in the aqueous phase. Starting materials for making N-methylpyrrolidine may include succinic acid, N-methylsuccinimide, and their analogs.

Werpy, Todd (West Richland, WA); Frye, Jr., John G. (Richland, WA); Wang, Yong (Richland, WA); Zacher, Alan H. (Kennewick, WA)

2003-12-30T23:59:59.000Z

310

AOCS Official Method F 2a-44  

Science Conference Proceedings (OSTI)

Organically Combined Sulfuric Anhydride, Titration Method AOCS Official Method F 2a-44 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the

311

AOCS Official Method Ce 6-86  

Science Conference Proceedings (OSTI)

Antioxidants — Liquid Chromatographic Method AOCS Official Method Ce 6-86 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines propyl gallate (

312

AOCS Official Method Ca 19-86  

Science Conference Proceedings (OSTI)

Phospholipids in Vegetable Oils Nephelometric Method AOCS Official Method Ca 19-86 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION The nephelometric method measu

313

AOCS Official Method Cc 16-60  

Science Conference Proceedings (OSTI)

Consistency Penetrometer Method AOCS Official Method Cc 16-60 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION The penetrometer method provides an arbitrary measu

314

AOCS Official Method Cd 8b-90  

Science Conference Proceedings (OSTI)

Peroxide Value Acetic Acid-Isooctane Method AOCS Official Method Cd 8b-90 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determine

315

AOCS Official Method Cc 9b-55  

Science Conference Proceedings (OSTI)

Flash Point Closed Cup Method AOCS Official Method Cc 9b-55 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads AOCS DEFINITION These methods determine th

316

AOCS Official Method To 1a-64  

Science Conference Proceedings (OSTI)

Specific Gravity AOCS Official Method To 1a-64 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads AOCS ...

317

AOCS Official Method Tl 1a-64  

Science Conference Proceedings (OSTI)

Saponification Value AOCS Official Method Tl 1a-64 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads AOCS ...

318

AOCS Official Method Tk 1a-64  

Science Conference Proceedings (OSTI)

Unsaponifiable Material AOCS Official Method Tk 1a-64 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads AOCS ...

319

AOCS Official Method Cd 22-91  

Science Conference Proceedings (OSTI)

AOCS Official Method Cd 22-91 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads AOCS DEFINITION...

320

Sand consolidation methods  

SciTech Connect

This patent describes a method for consolidating unconsolidated mineral particles including sand in a subterranean petroleum formation penetrated by a well in fluid communication with at least a portion of the formation. It comprises: providing a sand consolidating fluid comprising a polymerizable monomer, diluent for the monomer, and a nonvolatile strong acid catalyst capable of causing polymerization of the monomer at fluid injection temperatures; mixing the sand consolidating fluid with steam to form a multiphase treating fluid; injecting the treating fluid into the formation to occupy the void space of at least a portion of the formation adjacent to the well; and allowing the injected fluids to remain in the formations for a period of time sufficient to accomplish at least partial polymerization of the monomer, forming a permeable consolidated mass around the wellbore. Also described is a method for forming a fluid impermeable zone in a permeable, subterranean oil-containing formation adjacent to a wellbore penetrating the formation.

Friedman, R.H.; Surles, B.W.; Fader, P.D.

1990-02-27T23:59:59.000Z

Note: This page contains sample records for the topic "bispectral threshold method" 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

Accelerated Molecular Dynamics Methods  

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

Dynamics Methods Dynamics Methods for Infrequent Events Arthur F. Voter Theoretical Division Los Alamos National Laboratory Los Alamos, New Mexico U.S. Department of Energy Theory Focus Session on Hydrogen Storage Materials Crystal City, VA May 18, 2006 Los Alamos Acknowledgments Blas P. Uberuaga (LANL, MST-8) Francesco Montalenti (U. Milano-Bicocca) Graeme Henkelman (U. Texas at Austin) Timothy C. Germann (LANL, X-7) James A. Sprague (NRL) Mads Sorensen (Novo Nordisk A/S, Copenhagen) Sriram Swaminarayan (LANL, MST-8) Steve Stuart (Clemson) David Sholl (Carnegie Mellon) John Hamilton (Sandia) Wolfgang Windl (Ohio State) Roger Smith (U. Loughborough) Robin Grimes (Imperial College) Kurt Sickafus (LANL, MST-8) Jacques Amar (U. Toledo) DOE Office of Basic Energy Sciences Motorola Intel Los Alamos Outline

322

Method for welding beryllium  

DOE Patents (OSTI)

A method is provided for joining beryllium pieces which comprises: depositing aluminum alloy on at least one beryllium surface; contacting that beryllium surface with at least one other beryllium surface; and welding the aluminum alloy coated beryllium surfaces together. The aluminum alloy may be deposited on the beryllium using gas metal arc welding. The aluminum alloy coated beryllium surfaces may be subjected to elevated temperatures and pressures to reduce porosity before welding the pieces together. The aluminum alloy coated beryllium surfaces may be machined into a desired welding joint configuration before welding. The beryllium may be an alloy of beryllium or a beryllium compound. The aluminum alloy may comprise aluminum and silicon. Beryllium parts made using this method can be used as structural components in aircraft, satellites and space applications.

Dixon, R.D.; Smith, F.M.; O`Leary, R.F.

1995-12-31T23:59:59.000Z

323

Cold isopressing method  

DOE Patents (OSTI)

A cold isopressing method in which two or more layers of material are formed within an isopressing mold. One of the layers consists of a tape-cast film. The layers are isopressed within the isopressing mold, thereby to laminate the layers and to compact the tape-cast film. The isopressing mold can be of cylindrical configuration with the layers being coaxial cylindrical layers. The materials used in forming the layers can contain green ceramic materials and the resultant structure can be fired and sintered as necessary and in accordance with known methods to produce a finished composite, ceramic structure. Further, such green ceramic materials can be of the type that are capable of conducting hydrogen or oxygen ions at high temperature with the object of utilizing the finished composite ceramic structure as a ceramic membrane element.

Chen, Jack C. (Getzville, NY); Stawisuck, Valerie M. (North Tonawanda, NY); Prasad, Ravi (East Amherst, NY)

2003-01-01T23:59:59.000Z

324

Biological tracer method  

DOE Patents (OSTI)

The present invention is a biological tracer method for characterizing the movement of a material through a medium, comprising the steps of: introducing a biological tracer comprising a microorganism having ice nucleating activity into a medium; collecting at least one sample of the medium from a point removed from the introduction point; and analyzing the sample for the presence of the biological tracer. The present invention is also a method for using a biological tracer as a label for material identification by introducing a biological tracer having ice nucleating activity into a material, collecting a sample of a portion of the labelled material and analyzing the sample for the presence of the biological tracer. 2 figs.

Strong-Gunderson, J.M.; Palumbo, A.V.

1998-09-15T23:59:59.000Z

325

Biological tracer method  

DOE Patents (OSTI)

The present invention is a biological tracer method for characterizing the movement of a material through a medium, comprising the steps of: introducing a biological tracer comprising a microorganism having ice nucleating activity into a medium; collecting at least one sample of the medium from a point removed from the introduction point; and analyzing the sample for the presence of the biological tracer. The present invention is also a method for using a biological tracer as a label for material identification by introducing a biological tracer having ice nucleating activity into a material, collecting a sample of a portion of the labelled material and analyzing the sample for the presence of the biological tracer.

Strong-Gunderson, Janet M. (Ten Mile, TN); Palumbo, Anthony V. (Oak Ridge, TN)

1998-01-01T23:59:59.000Z

326

Method for making glass  

DOE Patents (OSTI)

A method is discussed for making better quality molten borosilicate glass in a glass melter, the glass having the desired viscosity and, preferably, also the desired resistivity so that the glass melt can be established effectively and the product of the glass melter will have the desired level of quality. The method includes the adjustment of the composition of the glass constituents that are fed into the melter in accordance with certain correlations that reliably predict the viscosity and resistivity from the melter temperature and the melt composition, then heating the ingredients to the melter's operating temperature until they melt and homogenize. The equations include the calculation of a non-bridging oxygen'' term from the numbers of moles of the various ingredients, and then the determination of the viscosity and resistivity from the operating temperature of the melter and the non-bridging oxygen term.

Jantzen, C.M.

1991-01-01T23:59:59.000Z

327

Extrusion die and method  

DOE Patents (OSTI)

A method and die apparatus for manufacturing a honeycomb body of rhombic cell cross-section by extrusion through an extrusion die of triangular cell discharge slot configuration, the die incorporating feedholes at selected slot intersections only, such that slot segments communicating directly with the feedholes discharge web material and slot segments not so connected do not discharge web material, whereby a rhombic cell cross-section in the extruded body is provided.

Lipp, G. Daniel (Painted Post, NY)

1994-04-26T23:59:59.000Z

328

Method for scavenging mercury  

DOE Patents (OSTI)

Disclosed herein is a method for removing mercury from a gas stream comprising contacting the gas stream with a getter composition comprising bromine, bromochloride, sulphur bromide, sulphur dichloride or sulphur monochloride and mixtures thereof. In one preferred embodiment the getter composition is adsorbed onto a sorbent. The sorbent may be selected from the group consisting flyash, limestone, lime, calcium sulphate, calcium sulfite, activated carbon, charcoal, silicate, alumina and mixtures thereof. Preferred is flyash, activated carbon and silica.

Chang, Shih-ger (El Cerrito, CA); Liu, Shou-heng (Kaohsiung, TW); Liu, Zhao-rong (Bejing, CN); Yan, Naiqiang (Burkeley, CA)

2010-07-13T23:59:59.000Z

329

Method for scavenging mercury  

SciTech Connect

Disclosed herein is a method for removing mercury from a gas stream comprising contacting the gas stream with a getter composition comprising bromine, bromochloride, sulphur bromide, sulphur dichloride or sulphur monochloride and mixtures thereof. In one preferred embodiment the getter composition is adsorbed onto a sorbent. The sorbent may be selected from the group consisting of flyash, limestone, lime, calcium sulphate, calcium sulfite, activated carbon, charcoal, silicate, alumina and mixtures thereof. Preferred is flyash, activated carbon and silica.

Chang, Shih-Ger (El Cerrito, CA); Liu, Shou-Heng (Kaohsiung, TW); Liu, Zhao-Rong (Beijing, CN); Yan, Naiqiang (Berkeley, CA)

2011-08-30T23:59:59.000Z

330

Method for scavenging mercury  

SciTech Connect

Disclosed herein is a method for removing mercury from a gas stream comprising contacting the gas stream with a getter composition comprising bromine, bromochloride, sulphur bromide, sulphur dichloride or sulphur monochloride and mixtures thereof. In one preferred embodiment the getter composition is adsorbed onto a sorbent. The sorbent may be selected from the group consisting of flyash, limestone, lime, calcium sulphate, calcium sulfite, activated carbon, charcoal, silicate, alumina and mixtures thereof. Preferred is flyash, activated carbon and silica.

Chang, Shih-ger (El Cerrito, CA); Liu, Shou-heng (Kaohsiung, TW); Liu, Zhao-rong (Beijing, CN); Yan, Naiqiang (Berkeley, CA)

2009-01-20T23:59:59.000Z

331

Method of casting aerogels  

DOE Patents (OSTI)

The invention describes a method for making monolithic castings of transparent silica aerogel with densities in the range from 0.001 g/cm[sup 3] to 0.6 g/cm[sup 3]. Various shapes of aerogels are cast in flexible polymer molds which facilitate removal and eliminate irregular surfaces. Mold dimensions are preselected to account for shrinkage of aerogel which occurs during the drying step of supercritical extraction of solvent. 2 figures.

Poco, J.F.

1993-09-07T23:59:59.000Z

332

Method of casting aerogels  

DOE Patents (OSTI)

The invention describes a method for making monolithic castings of transparent silica aerogel with densities in the range from 0.001 g/cm.sup.3 to 0.6 g/cm.sup.3. Various shapes of aerogels are cast in flexible polymer molds which facilitate removal and eliminate irregular surfaces. Mold dimensions are preselected to account for shrinkage of alcogel which occurs during the drying step of supercritical extraction of solvent.

Poco, John F. (Livermore, CA)

1993-01-01T23:59:59.000Z

333

Vapor spill monitoring method  

DOE Patents (OSTI)

Method for continuous sampling of liquified natural gas effluent from a spill pipe, vaporizing the cold liquified natural gas, and feeding the vaporized gas into an infrared detector to measure the gas composition. The apparatus utilizes a probe having an inner channel for receiving samples of liquified natural gas and a surrounding water jacket through which warm water is flowed to flash vaporize the liquified natural gas.

Bianchini, Gregory M. (Livermore, CA); McRae, Thomas G. (Livermore, CA)

1985-01-01T23:59:59.000Z

334

Method for making nanomaterials  

DOE Patents (OSTI)

A method of making a nanostructure by preparing a face centered cubic-ordered metal nanoparticle film from metal nanoparticles, such as gold and silver nanoparticles, exerting a hydrostatic pressure upon the film at pressures of several gigapascals, followed by applying a non-hydrostatic stress perpendicularly at a pressure greater than approximately 10 GPA to form an array of nanowires with individual nanowires having a relatively uniform length, average diameter and density.

Fan, Hongyou; Wu, Huimeng

2013-06-04T23:59:59.000Z

335

RUTHENIUM DECONTAMINATION METHOD  

DOE Patents (OSTI)

A liquid-liquid extraction method of separating uranium from fission products is given. A small amount of a low molecular weight ketone is added to an acidic aqueous solution containing neutron-irradiated uranium and its associated fission products. The resulting solution is digested and then contacted with an organic liquid that extracts uranium values. The purpose of the step of digesting the aqueous solution in the presence of the ketone is to suppress the extractability of ruthenium.

Gresky, A.T.

1960-07-19T23:59:59.000Z

336

Bayesian methods in bioinformatics  

E-Print Network (OSTI)

This work is directed towards developing flexible Bayesian statistical methods in the semi- and nonparamteric regression modeling framework with special focus on analyzing data from biological and genetic experiments. This dissertation attempts to solve two such problems in this area. In the first part, we study penalized regression splines (P-splines), which are low-order basis splines with a penalty to avoid under- smoothing. Such P-splines are typically not spatially adaptive, and hence can have trouble when functions are varying rapidly. We model the penalty parameter inherent in the P-spline method as a heteroscedastic regression function. We develop a full Bayesian hierarchical structure to do this and use Markov Chain Monte Carlo tech- niques for drawing random samples from the posterior for inference. We show that the approach achieves very competitive performance as compared to other methods. The second part focuses on modeling DNA microarray data. Microarray technology enables us to monitor the expression levels of thousands of genes simultaneously and hence to obtain a better picture of the interactions between the genes. In order to understand the biological structure underlying these gene interactions, we present a hierarchical nonparametric Bayesian model based on Multivariate Adaptive Regres-sion Splines (MARS) to capture the functional relationship between genes and also between genes and disease status. The novelty of the approach lies in the attempt to capture the complex nonlinear dependencies between the genes which could otherwise be missed by linear approaches. The Bayesian model is flexible enough to identify significant genes of interest as well as model the functional relationships between the genes. The effectiveness of the proposed methodology is illustrated on leukemia and breast cancer datasets.

Baladandayuthapani, Veerabhadran

2005-12-01T23:59:59.000Z

337

Mixing method and apparatus  

DOE Patents (OSTI)

Method of mixing particulate materials comprising contacting a primary source and a secondary source thereof whereby resulting mixture ensues; preferably at least one of the two sources has enough motion to insure good mixing and the particulate materials may be heat treated if desired. Apparatus for such mixing comprising an inlet for a primary source, a reactor communicating therewith, a feeding means for supplying a secondary source to the reactor, and an inlet for the secondary source. Feeding means is preferably adapted to supply fluidized materials.

Green, Norman W. (Redwood City, CA)

1982-06-15T23:59:59.000Z

338

Method for welding beryllium  

DOE Patents (OSTI)

A method is provided for joining beryllium pieces which comprises: depositing aluminum alloy on at least one beryllium surface; contacting that beryllium surface with at least one other beryllium surface; and welding the aluminum alloy coated beryllium surfaces together. The aluminum alloy may be deposited on the beryllium using gas metal arc welding. The aluminum alloy coated beryllium surfaces may be subjected to elevated temperatures and pressures to reduce porosity before welding the pieces together. The aluminum alloy coated beryllium surfaces may be machined into a desired welding joint configuration before welding. The beryllium may be an alloy of beryllium or a beryllium compound. The aluminum alloy may comprise aluminum and silicon.

Dixon, Raymond D. (Los Alamos, NM); Smith, Frank M. (Espanola, NM); O' Leary, Richard F. (Los Alamos, NM)

1997-01-01T23:59:59.000Z

339

Methods of making monolayers  

DOE Patents (OSTI)

The invention pertains to methods of forming monolayers on various surfaces. The surfaces can be selected from a wide array of materials, including, for example, aluminum dioxide, silicon dioxide, carbon and SiC. The substrates can be planar or porous. The monolayer is formed under enhanced pressure conditions. The monolayer contains functionalized molecules, and accordingly functionalizes a surface of the substrate. The properties of the functionalized substrate can enhance the substrate's applicability for numerous purposes including, for example, utilization in extracting contaminants, or incorporation into a polymeric matrix.

Alford, Kentin L. (Pasco, WA); Simmons, Kevin L. (Kennewick, WA); Samuels, William D. (Richland, WA); Zemanian, Thomas S. (Richland, WA); Liu, Jun (Albuquerque, NM); Shin, Yongsoon (Richland, WA); Fryxell, Glen E. (Kennewick, WA)

2009-09-15T23:59:59.000Z

340

Methods of making monolayers  

DOE Patents (OSTI)

The invention pertains to methods of forming monolayers on various surfaces. The surfaces can be selected from a wide array of materials, including, for example, aluminum dioxide, silicon dioxide, carbon and SiC. The substrates can be planar or porous. The monolayer is formed under enhanced pressure conditions. The monolayer contains functionalized molecules, and accordingly functionalizes a surface of the substrate. The properties of the functionalized substrate can enhance the substrate's applicability for numerous purposes including, for example, utilization in extracting contaminants, or incorporation into a polymeric matrix.

Alford, Kentin L. (Pasco, WA); Simmons, Kevin L. (Kennewick, WA); Samuels, William D. (Richland, WA); Zemanian, Thomas S. (Richland, WA); Liu, Jun (Albuquerque, NM); Shin, Yongsoon (Richland, WA); Fryxell, Glen E. (Kennewick, WA)

2009-12-08T23:59:59.000Z

Note: This page contains sample records for the topic "bispectral threshold method" 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

Geophysics I. Seismic Methods  

SciTech Connect

During the past two decades, the technology of geophysics has exploded. At the same time, the petroleum industry has been forced to look for more and more subtle traps in more and more difficult terrain. The choice of papers in this geophysics reprint volume reflects this evolution. The papers were chosen to help geologists, not geophysicists, enhance their knowledge of geophysics. Math-intensive papers were excluded because those papers are relatively esoteric and have limited applicability for most geologists. This volume concentrates on different seismic survey methods. Each of the 38 papers were abstracted and indexed for the U.S. Department of Energy's Energy Data Base.

Beaumont, E.A.; Foster, N.H. (comps.)

1989-01-01T23:59:59.000Z

342

METHOD OF ISOTOPE CONCENTRATION  

DOE Patents (OSTI)

A method of concentrating N/sup 15/ in a liquid is described. Gaseous nitric oxide and at least one liquid selected from the group consisting of the aqueous oxyacids and oxides of nitrogen, wherein the atomic ratio of oxygen to nitrogen is greater than unity, are brought into intimate contact to cause an enrichment of the liquid and a depletion of the gas in N/sup 15/. The liquid is, thereafter, reacted with sulfur dioxide to produce a gas contuining nitric oxide. The gas contuining nitric oxide is then continuously passed in countercurrent contact with the liquid to cause further enrichment of the liquid.

Taylor, T.I.; Spindel, W.

1960-02-01T23:59:59.000Z

343

MATERIAL AND METHODS  

E-Print Network (OSTI)

The noradrenaline cells in the adrenal medulla become fluorescent when briefly fixed in formalin [6,71, but the nature of the reaction has not been elucidated. Recently Eranko [8] and Falck and Tot-p [lo] found that a very intense fluorescence develops in the noradrenaline cells when freeze-dried sections are exposed to formaldehyde vapour. As a great need exists for highly sensitive histochemical methods for demonstration of mono-amines--i.a. for localization of the brain catechol amines-it was thought worth while to study the reaction between formaldehyde and catechol amines in model systems and to isolate and examine the reaction products.

B. Falck; N. -a. Hillarp; G. Thieme; A. Torp

1961-01-01T23:59:59.000Z

344

Method of drying articles  

DOE Patents (OSTI)

A method of drying a green particulate article includes the steps of: (a) Providing a green article which includes a particulate material and a pore phase material, the pore phase material including a solvent; and (b) contacting the green article with a liquid desiccant for a period of time sufficient to remove at least a portion of the solvent from the green article, the pore phase material acting as a semipermeable barrier to allow the solvent to be sorbed into the liquid desiccant, the pore phase material substantially preventing the liquid desiccant from entering the pores. 3 figs.

Janney, M.A.; Kiggans, J.O. Jr.

1999-03-23T23:59:59.000Z

345

Method of drying articles  

DOE Patents (OSTI)

A method of drying a green particulate article includes the steps of: a. Providing a green article which includes a particulate material and a pore phase material, the pore phase material including a solvent; and b. contacting the green article with a liquid desiccant for a period of time sufficient to remove at least a portion of the solvent from the green article, the pore phase material acting as a semipermeable barrier to allow the solvent to be sorbed into the liquid desiccant, the pore phase material substantially preventing the liquid desiccant from entering the pores.

Janney, Mark A. (Knoxville, TN); Kiggans, Jr., James O. (Oak Ridge, TN)

1999-01-01T23:59:59.000Z

346

METHOD FOR MEASURING RADIATION  

DOE Patents (OSTI)

A method for measuring an unknown integrated quantity of radiation with a condenser ionization chamber is described. The chamber is initially charged to a predetermined voltage by a voltage source. The chamber is then removed from the source and exposed to an unknown quantity of radiation for a period of time. The quantity of radiation to which the chamber was exposed is then measured by detecting the magnitude of the pulse of current necessary to recharge the chamber of its initial value through a suitable impedance. The current pulse is amplified and measured directly by a suitable pulse height analyzing system. (AEC)

Roesch, W.C.; McCall, R.C.

1961-11-21T23:59:59.000Z

347

Laser pulse stacking method  

DOE Patents (OSTI)

A laser pulse stacking method is disclosed. A problem with the prior art has been the generation of a series of laser beam pulses where the outer and inner regions of the beams are generated so as to form radially non-synchronous pulses. Such pulses thus have a non-uniform cross-sectional area with respect to the outer and inner edges of the pulses. The present invention provides a solution by combining the temporally non-uniform pulses in a stacking effect to thus provide a more uniform temporal synchronism over the beam diameter. 2 figs.

Moses, E.I.

1992-12-01T23:59:59.000Z

348

Laser pulse stacking method  

DOE Patents (OSTI)

A laser pulse stacking method is disclosed. A problem with the prior art has been the generation of a series of laser beam pulses where the outer and inner regions of the beams are generated so as to form radially non-synchronous pulses. Such pulses thus have a non-uniform cross-sectional area with respect to the outer and inner edges of the pulses. The present invention provides a solution by combining the temporally non-uniform pulses in a stacking effect to thus provide a more uniform temporal synchronism over the beam diameter.

Moses, Edward I. (Livermore, CA)

1992-01-01T23:59:59.000Z

349

Control system design method  

Science Conference Proceedings (OSTI)

A control system design method and concomitant control system comprising representing a physical apparatus to be controlled as a Hamiltonian system, determining elements of the Hamiltonian system representation which are power generators, power dissipators, and power storage devices, analyzing stability and performance of the Hamiltonian system based on the results of the determining step and determining necessary and sufficient conditions for stability of the Hamiltonian system, creating a stable control system based on the results of the analyzing step, and employing the resulting control system to control the physical apparatus.

Wilson, David G. (Tijeras, NM); Robinett, III, Rush D. (Tijeras, NM)

2012-02-21T23:59:59.000Z

350

Cooling apparatus and method  

DOE Patents (OSTI)

A device and method provide for cooling of a system having an energy source, one or more devices that actively consume energy, and one or more devices that generate heat. The device may include one or more thermoelectric coolers ("TECs") in conductive engagement with at least one of the heat-generating devices, and an energy diverter for diverting at least a portion of the energy from the energy source that is not consumed by the active energy-consuming devices to the TECs.

Mayes, James C. (Sugar Land, TX)

2009-05-05T23:59:59.000Z

351

High Energy Beam Impacts on Beam Intercepting Devices: Advanced Numerical Methods and Experimental Set-Up  

E-Print Network (OSTI)

Beam Intercepting Devices are potentially exposed to severe accidental events triggered by direct impacts of energetic particle beams. State-of-the-art numerical methods are required to simulate the behaviour of affected components. A review of the different dynamic response regimes is presented, along with an indication of the most suited tools to treat each of them. The consequences on LHC tungsten collimators of a number of beam abort scenarios were extensively studied, resorting to a novel category of numerical explicit methods, named Hydrocodes. Full shower simulations were performed providing the energy deposition distribution. Structural dynamics and shock wave propagation analyses were carried out with varying beam parameters, identifying important thresholds for collimator operation, ranging from the onset of permanent damage up to catastrophic failure. Since the main limitation of these tools lies in the limited information available on constitutive material models under extreme conditions, a dedica...

Bertarelli, A; Carra, F; Cerutti, F; Dallocchio, A; Mariani, N; Timmins, M; Peroni, L; Scapin, M

2011-01-01T23:59:59.000Z

352

High Energy Beam Impacts on Beam Intercepting Devices: Advanced Numerical Methods and Experimental Set-up  

E-Print Network (OSTI)

Beam Intercepting Devices are potentially exposed to severe accidental events triggered by direct impacts of energetic particle beams. State-of-the-art numerical methods are required to simulate the behaviour of affected components. A review of the different dynamic response regimes is presented, along with an indication of the most suited tools to treat each of them. The consequences on LHC tungsten collimators of a number of beam abort scenarios were extensively studied, resorting to a novel category of numerical explicit methods, named Hydrocodes. Full shower simulations were performed providing the energy deposition distribution. Structural dynamics and shock wave propagation analyses were carried out with varying beam parameters, identifying important thresholds for collimator operation, ranging from the onset of permanent damage up to catastrophic failure. Since the main limitation of these tools lies in the limited information available on constitutive material models under extreme conditions, a dedica...

Bertarelli, A; Carra, F; Cerutti, F; Dallocchio, A; Mariani, N; Timmins, M; Peroni, L; Scapin, M

2011-01-01T23:59:59.000Z

353

METHOD OF LOCATING GROUNDS  

DOE Patents (OSTI)

ABS>This patent presents a method for locating a ground in a d-c circult having a number of parallel branches connected across a d-c source or generator. The complete method comprises the steps of locating the ground with reference to the mildpoint of the parallel branches by connecting a potentiometer across the terminals of the circuit and connecting the slider of the potentiometer to ground through a current indicating instrument, adjusting the slider to right or left of the mildpoint so as to cause the instrument to indicate zero, connecting the terminal of the network which is farthest from the ground as thus indicated by the potentiometer to ground through a condenser, impressing a ripple voltage on the circuit, and then measuring the ripple voltage at the midpoint of each parallel branch to find the branch in which is the lowest value of ripple voltage, and then measuring the distribution of the ripple voltage along this branch to determine the point at which the ripple voltage drops off to zero or substantially zero due to the existence of a ground. The invention has particular application where a circuit ground is present which will disappear if the normal circuit voltage is removed.

Macleish, K.G.

1958-02-11T23:59:59.000Z

354

AOCS Official Method Ce 7-87  

Science Conference Proceedings (OSTI)

Total Tocopherols in Deodorizer Distillate AOCS Official Method Ce 7-87 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines total tocopherols

355

AOCS Official Method Cd 11-57  

Science Conference Proceedings (OSTI)

a-Monoglycerides AOCS Official Method Cd 11-57 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads AOCS DEFINITION This method determines ?-mo

356

AOCS Official Method Cd 7-58  

Science Conference Proceedings (OSTI)

Polyunsaturated Acids, Ultraviolet Spectrophotometric Method AOCS Official Method Cd 7-58 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION The conjugated constitu

357

AOCS Official Method Da 17-52  

Science Conference Proceedings (OSTI)

Borax AOCS Official Method Da 17-52 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines borax in the sample. SCOPE ...

358

AOCS Official Method Da 18-48  

Science Conference Proceedings (OSTI)

Alkaline Silicates AOCS Official Method Da 18-48 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines alkaline silicates in the sample.

359

AOCS Official Method Da 9-48  

Science Conference Proceedings (OSTI)

Chlorides AOCS Official Method Da 9-48 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the chlorides in the sample. SCOPE...

360

AOCS Official Method Da 21-48  

Science Conference Proceedings (OSTI)

Tetrasodium Pyrophosphate AOCS Official Method Da 21-48 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines tetrasodium pyrophosphate.

Note: This page contains sample records for the topic "bispectral threshold method" 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

AOCS Official Method Dd 4-60  

Science Conference Proceedings (OSTI)

Neutral Oil (Unsulfonated Material) in Alkylbenzene Sulfonates AOCS Official Method Dd 4-60 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determine

362

AOCS Official Method Ca 12b-92  

Science Conference Proceedings (OSTI)

Phosphorus by Direct Graphite Furnace Atomic Absorption Spectrometry AOCS Official Method Ca 12b-92 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method,

363

AOCS Official Method Ba 10a-05  

Science Conference Proceedings (OSTI)

Protein Dispersibility Index (PDI) AOCS Official Method Ba 10a-05 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the dispersible protein

364

AOCS Official Method Cd 14-95  

Science Conference Proceedings (OSTI)

Isolated trans Isomers Infrared Spectrometric Method AOCS Official Method Cd 14-95 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION Isolated trans bonds

365

AOCS Official Method S 4b-64  

Science Conference Proceedings (OSTI)

Methods for Testing Fatty Amidoamines AOCS Official Method S 4b-64 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION   SCOPE Fa

366

AOCS Official Method Ca 12-55  

Science Conference Proceedings (OSTI)

Phosphorus AOCS Official Method Ca 12-55 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines phosphorus or the equivalent phosphatide content

367

AOCS Official Method Dd 3-60  

Science Conference Proceedings (OSTI)

Sodium Alkylbenzene Sulfonate by Ultraviolet Absorption AOCS Official Method Dd 3-60 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines sodiu

368

AOCS Official Method Da 10-42  

Science Conference Proceedings (OSTI)

Unsaponified Plus Unsaponifiable Matter AOCS Official Method Da 10-42 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads AOCS DEFINITION This method dete

369

AOCS Official Method Db 1-48  

Science Conference Proceedings (OSTI)

Moisture and Volatile Matter, Air Oven Method AOCS Official Method Db 1-48 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads AOCS ...

370

Research Method to Study Architecting  

E-Print Network (OSTI)

Researching architecting methods is a very abstract activity at a large distance from actual product creation. The relation between product creation, architecting, architecting methods and architecting methods research is shown.

Gerrit Muller

2003-01-01T23:59:59.000Z

371

Topological methods in quantum gravity.  

E-Print Network (OSTI)

??The main technical problem with background independent approaches to quantum gravity is inapplicability of standard quantum field theory methods. New methods are needed which would… (more)

Starodubtsev, Artem

2005-01-01T23:59:59.000Z

372

Electrochemical catalyst recovery method  

DOE Patents (OSTI)

A method of recovering catalyst material from latent catalyst material solids includes: a) combining latent catalyst material solids with a liquid acid anolyte solution and a redox material which is soluble in the acid anolyte solution to form a mixture; b) electrochemically oxidizing the redox material within the mixture into a dissolved oxidant, the oxidant having a potential for oxidation which is effectively higher than that of the latent catalyst material; c) reacting the oxidant with the latent catalyst material to oxidize the latent catalyst material into at least one oxidized catalyst species which is soluble within the mixture and to reduce the oxidant back into dissolved redox material; and d) recovering catalyst material from the oxidized catalyst species of the mixture. The invention is expected to be particularly useful in recovering spent catalyst material from petroleum hydroprocessing reaction waste products having adhered sulfides, carbon, hydrocarbons, and undesired metals, and as well as in other industrial applications.

Silva, Laura J. (Richland, WA); Bray, Lane A. (Richland, WA)

1995-01-01T23:59:59.000Z

373

BEGIN VCALENDAR METHOD PUBLISH  

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

BEGIN VCALENDAR BEGIN VCALENDAR METHOD PUBLISH PRODID aps anl gov NONSGML iCalcreator VERSION X WR TIMEZONE America Chicago BEGIN VEVENT UID T152245CST wfNso0 aps anl gov DTSTAMP T212245Z DESCRIPTION DTEND TZID America Chicago T130000 DTSTART TZID America Chicago T120000 LOCATION A1100 SUMMARY User Science Seminar resumes END VEVENT BEGIN VEVENT UID T152245CST bNeb1D aps anl gov DTSTAMP T212245Z DESCRIPTION DTEND TZID America Chicago T090000 DTSTART TZID America Chicago T080000 SUMMARY Run Begins END VEVENT BEGIN VEVENT UID T152245CST C7VJtG aps anl gov DTSTAMP T212245Z DESCRIPTION Anthony Cugini DOE NETL DTEND TZID America Chicago T120000 DTSTART TZID America Chicago T110000 LOCATION Y AUD SUMMARY Application of Computational Science for Fossil Fuel Conversion

374

Method for radioactivity monitoring  

DOE Patents (OSTI)

The disclosure relates to a method for analyzing uranium and/or thorium contents of liquid effluents preferably utilizing a sample containing counting chamber. Basically, 185.7-keV gamma rays following .sup.235 U alpha decay to .sup.231 Th which indicate .sup.235 U content and a 63-keV gamma ray doublet found in the nucleus of .sup.234 Pa, a granddaughter of .sup.238 U, are monitored and the ratio thereof taken to derive uranium content and isotopic enrichment .sup.235 U/.sup.235 U + .sup.238 U) in the liquid effluent. Thorium content is determined by monitoring the intensity of 238-keV gamma rays from the nucleus of .sup.212 Bi in the decay chain of .sup.232 Th.

Umbarger, C. John (Los Alamos, NM); Cowder, Leo R. (Santa Fe, NM)

1976-10-26T23:59:59.000Z

375

Method for welding beryllium  

DOE Patents (OSTI)

A method is provided for joining beryllium pieces which comprises: depositing aluminum alloy on at least one beryllium surface; contacting that beryllium surface with at least one other beryllium surface; and welding the aluminum alloy coated beryllium surfaces together. The aluminum alloy may be deposited on the beryllium using gas metal arc welding. The aluminum alloy coated beryllium surfaces may be subjected to elevated temperatures and pressures to reduce porosity before welding the pieces together. The aluminum alloy coated beryllium surfaces may be machined into a desired welding joint configuration before welding. The beryllium may be an alloy of beryllium or a beryllium compound. The aluminum alloy may comprise aluminum and silicon. 9 figs.

Dixon, R.D.; Smith, F.M.; O`Leary, R.F.

1997-04-01T23:59:59.000Z

376

Method for controlling brazing  

DOE Patents (OSTI)

A method for making a braze joint across a discontinuity in a work piece using alternating current. A filler metal is pre-placed at a location sufficiently close to the discontinuity such that, when an alternating current is applied across a work piece to heat the work piece and melt the filler metal, the filler metal is drawn into the discontinuity. The alternating current is maintained for a set residence time, generally less than 10 seconds and more particularly less than 3 seconds. The alternating current is then altered, generally by reducing the current and/or voltage such that the filler metal can solidify to form a braze joint of desired quality and thickness.

Hosking, F. Michael (Albuquerque, NM); Hall, Aaron C. (Albuquerque, NM); Givler, Richard C. (Albuquerque, NM); Walker, Charles A. (Albuquerque, NM)

2006-08-01T23:59:59.000Z

377

Error detection method  

DOE Patents (OSTI)

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

Olson, Eric J.

2013-06-11T23:59:59.000Z

378

HEAT TRANSFER METHOD  

DOE Patents (OSTI)

A method is given for increasing burn-out heat fluxes under nucleate boiling conditions in heat exchanger tubes without incurring an increase in pumping power requirements. This increase is achieved by utilizing a spinning flow having a rotational velocity sufficient to produce a centrifugal acceleration of at least 10,000 g at the tube wall. At this acceleration the heat-transfer rate at burn out is nearly twice the rate which can be achieved in a similar tube utilizing axial flow at the same pumping power. At higher accelerations the improvement over axial flow is greater, and heat fluxes in excess of 50 x 10/sup 6/ Btu/hr/sq ft can be achieved.

Gambill, W.R.; Greene, N.D.

1960-08-30T23:59:59.000Z

379

Magnesium fluoride recovery method  

DOE Patents (OSTI)

A method of obtaining magnesium fluoride substantially free from radioactive uranium from a slag containing the same and having a radioactivity level of at least about 7000 pCi/gm. The slag is ground to a particle size of about 200 microns or less. The ground slag is contacted with an acid under certain prescribed conditions to produce a liquid product and a particulate solid product. The particulate solid product is separated from the liquid and treated at least two more times with acid to produce a solid residue consisting essentially of magnesium fluoride substantially free of uranium and having a residual radioactivity level of less than about 1000 pCi/gm. In accordance with a particularly preferred embodiment of the invention a catalyst and an oxidizing agent are used during the acid treatment and preferably the acid is sulfuric acid having a strength of about 1.0 Normal.

Gay, Richard L. (Canoga Park, CA); McKenzie, Donald E. (Woodland Hills, CA)

1989-01-01T23:59:59.000Z

380

METHOD OF SEPARATING PLUTONIUM  

DOE Patents (OSTI)

Plutonium hexafluoride is a satisfactory fluorinating agent and may be reacted with various materials capable of forming fluorides, such as copper, iron, zinc, etc., with consequent formation of the metal fluoride and reduction of the plutonium to the form of a lower fluoride. In accordance with the present invention, it has been found that the reactivity of plutonium hexafluoride with other fluoridizable materials is so great that the process may be used as a method of separating plutonium from mixures containing plutonium hexafluoride and other vaporized fluorides even though the plutonium is present in but minute quantities. This process may be carried out by treating a mixture of fluoride vapors comprising plutonium hexafluoride and fluoride of uranium to selectively reduce the plutonium hexafluoride and convert it to a less volatile fluoride, and then recovering said less volatile fluoride from the vapor by condensation.

Brown, H.S.; Hill, O.F.

1958-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "bispectral threshold method" 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

METHOD OF PRODUCING NEUTRONS  

DOE Patents (OSTI)

A method for producing neutrons is described in which there is employed a confinement zone defined between longitudinally spaced localized gradient regions of an elongated magnetic field. Changed particles and neutralizing electrons, more specifically deuterons and tritons and neutralizng electrons, are injected into the confinement field from ion sources located outside the field. The rotational energy of the parrticles is increased at the gradients by imposing an oscillating transverse electrical field thereacross. The imposition of such oscillating transverse electrical fields improves the reflection capability of such gradient fielda so that the reactive particles are retained more effectively within the zone. With the attainment of appropriate densities of plasma particles and provided that such particles are at a sufficiently high temperature, neutron-producing reactions ensue and large quantities of neutrons emerge from the containment zone. (AEC)

Imhoff, D.H.; Harker, W.H.

1964-02-01T23:59:59.000Z

382

Explosive fracturing method  

SciTech Connect

A method of inducing a fracture system and multiple cavities in earthen formations is described. A first explosive, preferably nuclear, is buried at a sufficient depth so that its subsequent detonation is fully contained within the earth. Thereafter a second explosive, also preferably nuclear, is buried a predetermined distance from the situs of the first explosive. After detonation of the first explosive, time is allowed to elapse during which the cavity formed by the first explosive collapses to form a rubblized chimney. Thereafter, the second explosive is detonated to create a second chimney parallel to that of the first explosive together with a zone of enhanced permeability between the first and second. (10 claims)

Boardman, C.R.; Knutson, C.F.

1973-12-11T23:59:59.000Z

383

Method for forming materials  

DOE Patents (OSTI)

A material-forming tool and a method for forming a material are described including a shank portion; a shoulder portion that releasably engages the shank portion; a pin that releasably engages the shoulder portion, wherein the pin defines a passageway; and a source of a material coupled in material flowing relation relative to the pin and wherein the material-forming tool is utilized in methodology that includes providing a first material; providing a second material, and placing the second material into contact with the first material; and locally plastically deforming the first material with the material-forming tool so as mix the first material and second material together to form a resulting material having characteristics different from the respective first and second materials.

Tolle, Charles R. (Idaho Falls, ID); Clark, Denis E. (Idaho Falls, ID); Smartt, Herschel B. (Idaho Falls, ID); Miller, Karen S. (Idaho Falls, ID)

2009-10-06T23:59:59.000Z

384

Catalysts and method  

DOE Patents (OSTI)

An improved catlayst and method for the oxyhydrochlorination of methane is disclosed. The catalyst includes a pyrogenic porous support on which is layered as active material, cobalt chloride in major proportion, and minor proportions of an alkali metal chloride and of a rare earth chloride. On contact of the catalyst with a gas flow of methane, HC1 and oxygen, more than 60% of the methane is converted and of that converted more than 40% occurs as monochloromethane. Advantageously, the monochloromethane can be used to produce gasoline boiling range hydrocarbons with the recycle of HCl for further reaction. This catalyst is also of value for the production of formic acid as are analogous catalysts with lead, silver or nickel chlorides substituted for the cobalt chloride.

Taylor, Charles E. (Pittsburgh, PA); Noceti, Richard P. (Pittsburgh, PA)

1991-01-01T23:59:59.000Z

385

Electrochemical catalyst recovery method  

DOE Patents (OSTI)

A method of recovering catalyst material from latent catalyst material solids includes: (a) combining latent catalyst material solids with a liquid acid anolyte solution and a redox material which is soluble in the acid anolyte solution to form a mixture; (b) electrochemically oxidizing the redox material within the mixture into a dissolved oxidant, the oxidant having a potential for oxidation which is effectively higher than that of the latent catalyst material; (c) reacting the oxidant with the latent catalyst material to oxidize the latent catalyst material into at least one oxidized catalyst species which is soluble within the mixture and to reduce the oxidant back into dissolved redox material; and (d) recovering catalyst material from the oxidized catalyst species of the mixture. The invention is expected to be particularly useful in recovering spent catalyst material from petroleum hydroprocessing reaction waste products having adhered sulfides, carbon, hydrocarbons, and undesired metals, and as well as in other industrial applications. 3 figs.

Silva, L.J.; Bray, L.A.

1995-05-30T23:59:59.000Z

386

Freeze drying method  

DOE Patents (OSTI)

The present invention provides methods and apparatus for freeze drying in which a solution, which can be a radioactive salt dissolved within an acid, is frozen into a solid on vertical plates provided within a freeze drying chamber. The solid is sublimated into vapor and condensed in a cold condenser positioned above the freeze drying chamber and connected thereto by a conduit. The vertical positioning of the cold condenser relative to the freeze dryer helps to help prevent substances such as radioactive materials separated from the solution from contaminating the cold condenser. Additionally, the system can be charged with an inert gas to produce a down rush of gas into the freeze drying chamber to also help prevent such substances from contaminating the cold condenser.

Coppa, Nicholas V. (Malvern, PA); Stewart, Paul (Youngstown, NY); Renzi, Ernesto (Youngstown, NY)

1999-01-01T23:59:59.000Z

387

METHOD OF RECOVERING THORIUM  

DOE Patents (OSTI)

A method is described for recovering thorium from impurities found in a slag containing thorium and said impurities, comprising leaching a composition containing thorium with water, removing the water solution, treating the residue with hydrochloric acid, separating the solution from the insoluble residue, adjusting its acidity to 1 to 3 normal, adding oxalic acid, and thereafter separating the precipitated thorium oxalate digesting the residue from the hydrochloric acid treatment with a strong solution of sodium hydroxide at an elevated temperature, removing said solution and treating the insoluble residue with hydrochloric acid, separating the solution from the insoluble residue, adjusting the acidity of this solution to 1 to 3 normal, adding nitric acid to oxidize the iron present, adding oxalic acid and thereafter separating the thorium oxalate thus precipitated.

Fisher, R.W.

1957-12-10T23:59:59.000Z

388

Hydroforming device and method  

SciTech Connect

An apparatus (10, 110) and method to form a workpiece (32, 132) into a useful product (28, 128) using a pressurized fluid (14), also termed as "hydroforming". The workpiece may be a tube or may be one or a plurality of sheets of a material. The apparatus has a chamber (12) adapted to contain a quantity of a fluid, a hydroforming means positioned within the chamber, and means for substantially immersing the workpiece in the fluid before, during and after the hydroforming operation. Dies (16, 18) enclose the workpiece and provide a cavity of desired shape against which the workpiece is expanded by the pressurized fluid. The chamber may be open or closed to the atmosphere during operation and the fluid temperature and/or level may be controlled.

Guza, David E. (Powell, OH)

2007-09-11T23:59:59.000Z

389

Radiofrequency attenuator and method  

SciTech Connect

Radiofrequency attenuator and method. The attenuator includes a pair of transparent windows. A chamber between the windows is filled with molten salt. Preferred molten salts include quarternary ammonium cations and fluorine-containing anions such as tetrafluoroborate (BF.sub.4.sup.-), hexafluorophosphate (PF.sub.6.sup.-), hexafluoroarsenate (AsF.sub.6.sup.-), trifluoromethylsulfonate (CF.sub.3SO.sub.3.sup.-), bis(trifluoromethylsulfonyl)imide ((CF.sub.3SO.sub.2).sub.2N.sup.-), bis(perfluoroethylsulfonyl)imide ((CF.sub.3CF.sub.2SO.sub.2).sub.2N.sup.-) and tris(trifluoromethylsulfonyl)methide ((CF.sub.3SO.sub.2).sub.3 C.sup.-). Radicals or radical cations may be added to or electrochemically generated in the molten salt to enhance the RF attenuation.

Warner, Benjamin P. (Los Alamos, NM); McCleskey, T. Mark (Los Alamos, NM); Burrell, Anthony K. (Los Alamos, NM); Agrawal, Anoop (Tucson, AZ); Hall, Simon B. (Palmerston North, NZ)

2009-11-10T23:59:59.000Z

390

Radiofrequency attenuator and method  

DOE Patents (OSTI)

Radiofrequency attenuator and method. The attenuator includes a pair of transparent windows. A chamber between the windows is filled with molten salt. Preferred molten salts include quarternary ammonium cations and fluorine-containing anions such as tetrafluoroborate (BF.sub.4.sup.-), hexafluorophosphate (PF.sub.6.sup.-), hexafluoroarsenate (AsF.sub.6.sup.-), trifluoromethylsulfonate (CF.sub.3SO.sub.3.sup.-), bis(trifluoromethylsulfonyl)imide ((CF.sub.3SO.sub.2).sub.2N.sup.-), bis(perfluoroethylsulfonyl)imide ((CF.sub.3CF.sub.2SO.sub.2).sub.2N.sup.-) and tris(trifluoromethylsulfonyl)methide ((CF.sub.3SO.sub.2).sub.3C.sup.-). Radicals or radical cations may be added to or electrochemically generated in the molten salt to enhance the RF attenuation.

Warner, Benjamin P. (Los Alamos, NM); McCleskey, T. Mark (Los Alamos, NM); Burrell, Anthony K. (Los Alamos, NM); Agrawal, Anoop (Tucson, AZ); Hall, Simon B. (Palmerston North, NZ)

2009-01-20T23:59:59.000Z

391

Gas centrifuge purge method  

DOE Patents (OSTI)

1. In a method of separating isotopes in a high speed gas centrifuge wherein a vertically oriented cylindrical rotor bowl is adapted to rotate about its axis within an evacuated chamber, and wherein an annular molecular pump having an intake end and a discharge end encircles the uppermost portion of said rotor bowl, said molecular pump being attached along its periphery in a leak-tight manner to said evacuated chamber, and wherein end cap closure means are affixed to the upper end of said rotor bowl, and a process gas withdrawal and insertion system enters said bowl through said end cap closure means, said evacuated chamber, molecular pump and end cap defining an upper zone at the discharge end of said molecular pump, said evacuated chamber, molecular pump and rotor bowl defining a lower annular zone at the intake end of said molecular pump, a method for removing gases from said upper and lower zones during centrifuge operation with a minimum loss of process gas from said rotor bowl, comprising, in combination: continuously measuring the pressure in said upper zone, pumping gas from said lower zone from the time the pressure in said upper zone equals a first preselected value until the pressure in said upper zone is equal to a second preselected value, said first preselected value being greater than said second preselected value, and continuously pumping gas from said upper zone from the time the pressure in said upper zone equals a third preselected value until the pressure in said upper zone is equal to a fourth preselected value, said third preselected value being greater than said first, second and fourth preselected values.

Theurich, Gordon R. (Oak Ridge, TN)

1976-01-01T23:59:59.000Z

392

AOCS Official Method Ai 3-75  

Science Conference Proceedings (OSTI)

Oil Content AOCS Official Method Ai 3-75 Methods Methods and Analyses Analytical Chemistry Methods Downloads DEFINITION This

393

Sand consolidation method  

SciTech Connect

This patent describes a method of treating a subterranean, unconsolidated sand and petroleum-containing formation whose temperature is less than 200{degrees}F penetrated by at least one well, which is in fluid communication with at least a portion of the unconsolidated sand-containing subterranean formation, in order to form a permeable barrier in the treatment zone around the well which restrains the movement of sand particles into the well while permitting the passage of formation fluids including petroleum therethrough. It comprises introducing a non aqueous gas into the treatment zone of the formation to reduce the water content of the portion of the formation where the permeable barrier is to be formed to less than 5 percent by volume based on the volume of pore space to be treated; introducing an effective volume of treating fluid into the treatment zone, comprising a compound which is capable of being acid catalyzed to undergo condensation polymerization at formation temperatures, an anhydride of a strong acid, and a diluent for the polymerizable compound and the anhydride; and allowing the treating fluid to remain in the treatment zone for a period of time sufficient to ensure substantially complete polymerization.

Friedman, R.H.; Surles, B.W.

1991-08-20T23:59:59.000Z

394

Method for biological purification  

DOE Patents (OSTI)

An apparatus is disclosed for containing a microorganism culture in an active exponential growth and delivering a supply of microorganisms to an environment containing wastes for bio-augmenting the biodegradation of the wastes. The apparatus comprises a bioreactor and an operably connected controller. The bioreactor has a bioreactor chamber for containing a supply of microorganisms, a second chamber for containing a supply of water and inorganic nutrients, and a third chamber for containing a supply of organic nutrients. The bioreactor is operably connected to the controller in which a first pump is operably connected in fluid communication between the bioreactor chamber and the second chamber and third chamber, and a second pump is operably connected in fluid communication between the bioreactor chamber and the environment containing wastes to be biodegraded. The controller further includes a timer and regulator operably connected to the first and second pumps to effectively maintain the microorganisms in exponential growth in the bioreactor chamber and to deliver microorganisms to an environment to be treated. Also, disclosed is a method for bio-augmenting the biodegradation of wastes.

Lucido, John A. (Mt. Sinai, NY); Keenan, Daniel (Rockville Centre, NY); Premuzic, Eugene T. (East Moriches, NY); Lin, Mow S. (Rocky Point, NY); Shelenkova, Ludmila (Yaphank, NY)

2001-03-27T23:59:59.000Z

395

Bismuth generator method  

DOE Patents (OSTI)

A method for separating .sup.213 Bi from a solution of radionuclides wherein the solution contains a concentration of the chloride ions and hydrogen ions adjusted to allow the formation of a chloride complex. The solution is then brought into contact with an anion exchange resin, whereupon .sup.213 Bi is absorbed from the solution and adhered onto the anion exchange resin in the chloride complex. Other non-absorbing radionuclides such as .sup.225 Ra, .sup.225 Ac, and .sup.221 Fr, along with HCl are removed from the anion exchange resin with a scrub solution. The .sup.213 Bi is removed from the anion exchange resin by washing the anion exchange resin with a stripping solution free of chloride ions and with a reduced hydrogen ion concentration which breaks the chloride anionic complex, releasing the .sup.213 Bi as a cation. In a preferred embodiment of the present invention, the anion exchange resin is provided as a thin membrane, allowing for extremely rapid adherence and stripping of the .sup.213 Bi. A preferred stripping solution for purification of .sup.213 Bi for use in medical applications includes sodium acetate, pH 5.5. A protein conjugated with bifunctional chelating agents in vivo with the NaOAc, to receive the .sup.213 Bi as it is being released from the anion exchange resin.

Bray, Lane Allan (Richland, WA); DesChane, Jaquetta R. (Pasco, WA)

1998-01-01T23:59:59.000Z

396

Method for etherifications  

DOE Patents (OSTI)

A method for producing tertiary ethers from C.sub.4 or C.sub.5 streams containing isobutene and isoamylene respectively in a process wherein a acidic cation exchange resin is used as the catalyst and as a distillation structure in a distillation reactor column, wherein the improvement is the operation of the catalytic distillation in two zones at different pressures, the first zone containing the catalyst packing and operated a higher pressure in the range of 100 to 200 psig in the case of C.sub.4 's and 15 to 100 psig in the case of C.sub.5 's which favors the etherification reaction and the second zone being a distillation operated at a lower pressure in the range of 0 to 100 psig in the case of C.sub.4 's and 0 to 15 psig in the case of C.sub.5 's wherein a first overhead from the first zone is fractionated to remove a portion of the unreacted alcohol from the first overhead and to return a condensed portion containing said alcohol to the first zone and to produce a second overhead having less alcohol than said first overhead.

Jones, Jr., Edward M. (Friendswood, TX)

1985-01-01T23:59:59.000Z

397

Method for etherifications  

DOE Patents (OSTI)

A method is described for producing tertiary ethers from C[sub 4] or C[sub 5] streams containing isobutene and isoamylene respectively in a process wherein a acidic cation exchange resin is used as the catalyst and as a distillation structure in a distillation reactor column, wherein the improvement is the operation of the catalytic distillation in two zones at different pressures, the first zone containing the catalyst packing and operated a higher pressure in the range of 100 to 200 psig in the case of C[sub 4] and 15 to 100 psig in the case of C[sub 5] which favors the etherification reaction and the second zone being a distillation operated at a lower pressure in the range of 0 to 100 psig in the case of C[sub 4] and 0 to 15 psig in the case of C[sub 5] wherein a first overhead from the first zone is fractionated to remove a portion of the unreacted alcohol from the first overhead and to return a condensed portion containing said alcohol to the first zone and to produce a second overhead having less alcohol than said first overhead. 3 figs.

Jones, E.M. Jr.

1985-03-12T23:59:59.000Z

398

Manifold methods for methane combustion  

SciTech Connect

Objective is to develop a new method for studying realistic chemistry in turbulent methane combustion with NO{sub x} mechanism. The realistic chemistry is a simplification to a more detailed chemistry based on the manifold method; accuracy is determined by interaction between the transport process and the chemical reaction. In this new (tree) method, probability density function or partially stirred reactor calculations are performed. Compared with the reduced mechanism, manifold, and tabulation methods, the new method overcomes drawbacks of the reduced mechanism method and preserves the advantages of the manifold method. Accuracy is achieved by specifying the size of the cell.

Yang, B.; Pope, S.B. [Cornell Univ., Ithaca, NY (United States)

1995-12-31T23:59:59.000Z

399

Gamma-Hadron Separation Methods for the VERITAS Array of Four Imaging Atmospheric Cherenkov Telescopes  

E-Print Network (OSTI)

Ground-based arrays of imaging atmospheric Cherenkov telescopes have emerged as the most sensitive gamma-ray detectors in the energy range of about 100 GeV and above. The strengths of these arrays are a very large effective collection area on the order of 100,000 square meter, combined with excellent single photon angular and energy resolutions. The sensitivity of such detectors is limited by statistical fluctuations in the number of Cosmic Ray initiated air showers that resemble gamma-ray air showers in many ways. In this paper, we study the performance of simple event reconstruction methods when applied to simulated data of the Very Energetic Radiation Imaging Telescope Array System (VERITAS) experiment. We review methods for reconstructing the arrival direction and the energy of the primary photons, and examine means to improve on their performance. For a software threshold energy of 300 GeV (100 GeV), the methods achieve point source angular and energy resolutions of sigma[63%]= 0.1 degree (0.2 degree) and sigma[68%]= 15% (22%), respectively. The main emphasis of the paper is the discussion of gamma-hadron separation methods for the VERITAS experiment. We find that the information from several methods can be combined based on a likelihood ratio approach and the resulting algorithm achieves a gamma-hadron suppression with a quality factor that is substantially higher than that achieved with the standard methods used so far.

H. Krawczynski; D. A. Carter-Lewis; C. Duke; J. Holder; G. Maier; S. Le Bohec; G. Sembroski

2006-04-24T23:59:59.000Z

400

AOCS Official Method Ab 7-91  

Science Conference Proceedings (OSTI)

Aflatoxins AOCS Official Method Ab 7-91 Methods Methods and Analyses Analytical Chemistry Methods Downloads DEFINITION This method quantitatively determines aflatoxins B 1 , B 2 , G 1

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


401

AOCS Official Method Bc 1-50  

Science Conference Proceedings (OSTI)

Sampling AOCS Official Method Bc 1-50 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION   SCOPE Applicable to sampling soybean

402

AOCS Official Method Bb 1-38  

Science Conference Proceedings (OSTI)

Sampling AOCS Official Method Bb 1-38 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION   SCOPE Applicable to cottonseed linter

403

AOCS Official Method Af 1-54  

Science Conference Proceedings (OSTI)

Sampling AOCS Official Method Af 1-54 Methods Methods and Analyses Methods Downloads Methods Downloads DEFINITION   SCOPE Applicable to flaxseed (see Notes, 2).

404

AOCS Official Method Ea 1-38  

Science Conference Proceedings (OSTI)

Sampling AOCS Official Method Ea 1-38 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads AOCS DEFINITION Not applicable ...

405

AOCS Official Method Cc 8f-91  

Science Conference Proceedings (OSTI)

Evaluation of Bleaching Clays and Adsorbents AOCS Official Method Cc 8f-91 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION   SCOPE ...

406

AOCS Official Method Dc 1-59  

Science Conference Proceedings (OSTI)

Sampling and Preparation of Laboratory Sample AOCS Official Method Dc 1-59 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads AOCS DEFINITION Not applica

407

AOCS Official Method Ca 18c-91  

Science Conference Proceedings (OSTI)

Determination of Lead by Direct Graphite Furnace Atomic Absorption Spectrophotometry AOCS Official Method Ca 18c-91 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION ...

408

AOCS Official Method S 1-64  

Science Conference Proceedings (OSTI)

Methods for Testing Commercial Fatty Acids AOCS Official Method S 1-64 Methods Downloads Methods Downloads DEFINITION   SCOPE This method covers the selection and application of

409

AOCS Official Method Ba 1-38  

Science Conference Proceedings (OSTI)

Sampling AOCS Official Method Ba 1-38 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION   SCOPE Applicable to oilseed slab and

410

AOCS Official Method Db 5-48  

Science Conference Proceedings (OSTI)

Total Alkalinity of Alcohol-Insoluble Matter AOCS Official Method Db 5-48 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads AOCS ...

411

AOCS Official Method C 1-47  

Science Conference Proceedings (OSTI)

Sampling AOCS Official Method C 1-47 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION   SCOPE Applicable to the sampling of an

412

AOCS Official Method Ca 6a-40  

Science Conference Proceedings (OSTI)

Unsaponifiable Matter AOCS Official Method Ca 6a-40 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION Unsaponifiable matter includes those substances frequently fo

413

AOCS Official Method Ca 6b-53  

Science Conference Proceedings (OSTI)

Unsaponifiable Matter AOCS Official Method Ca 6b-53 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION Unsaponifiable matter includes those substances frequently fo

414

AOCS Official Method Cf 1-68  

Science Conference Proceedings (OSTI)

Analytical Guidelines for Testing Feed Grade Fat Products AOCS Official Method Cf 1-68 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION   SCOP

415

AOCS Official Method F 2b-44  

Science Conference Proceedings (OSTI)

Organically Combined Sulfuric Anhydride, Extraction-Titration Method AOCS Official Method F 2b-44 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method det

416

AOCS Official Method Ca 14-56  

Science Conference Proceedings (OSTI)

Total, Free and Combined Glycerol Iodometric-Periodic Acid Method AOCS Official Method Ca 14-56 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method deter

417

AOCS Official Method Bb 3-47  

Science Conference Proceedings (OSTI)

Cellulose Yield Pressure-Cook Method AOCS Official Method Bb 3-47 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the yield of cellulose f

418

AOCS Official Method Da 24-48  

Science Conference Proceedings (OSTI)

Sugars, Munson and Walker Method AOCS Official Method Da 24-48 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the total sugars in the sam

419

AOCS Official Method Da 12-48  

Science Conference Proceedings (OSTI)

Rosin, McNicoll Method AOCS Official Method Da 12-48 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the rosin in fatty acids. ...

420

AOCS Official Method Da 25-48  

Science Conference Proceedings (OSTI)

Starch, Munson, and Walker Method AOCS Official Method Da 25-48 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the starch in the sam

Note: This page contains sample records for the topic "bispectral threshold method" 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

AOCS Official Method Da 23-56  

Science Conference Proceedings (OSTI)

Free Glycerol Iodometric-Periodic Acid Method AOCS Official Method Da 23-56 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines free glycerol

422

AOCS Official Method F 9a-44  

Science Conference Proceedings (OSTI)

Acidity, Method A AOCS Official Method F 9a-44 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines free (uncombined) fatty acids, which are ca

423

AOCS Official Method F 9c-44  

Science Conference Proceedings (OSTI)

Acidity, Method C AOCS Official Method F 9c-44 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the free (uncombined) fatty acids which are

424

AOCS Official Method Ba 4f-00  

Science Conference Proceedings (OSTI)

Combustion Method for Determination of Crude Protein in Soybean Meal AOCS Official Method Ba 4f-00 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method de

425

AOCS Official Method Ba 4e-93  

Science Conference Proceedings (OSTI)

Generic Combustion Method for Determination of Crude Protein AOCS Official Method Ba 4e-93 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method describes

426

AOCS Official Method Ea 8-58  

Science Conference Proceedings (OSTI)

Moisture, Karl Fischer Volumetric Method AOCS Official Method Ea 8-58 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the actual water con

427

AOCS Official Method Ca 2b-38  

Science Conference Proceedings (OSTI)

Moisture and Volatile Matter Hot Plate Method AOCS Official Method Ca 2b-38 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the moisture a

428

AOCS Official Method Ca 2d-25  

Science Conference Proceedings (OSTI)

Moisture and Volatile Matter Vacuum Oven Method AOCS Official Method Ca 2d-25 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the moisture

429

AOCS Official Method Ea 6-94  

Science Conference Proceedings (OSTI)

Determination of Crude Glycerin, Titrimetric Method AOCS Official Method Ea 6-94 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the glyce

430

AOCS Official Method Ca 2c-25  

Science Conference Proceedings (OSTI)

Moisture and Volatile Matter Air Oven Method AOCS Official Method Ca 2c-25 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the moisture an

431

AOCS Official Method Da 19b-42  

Science Conference Proceedings (OSTI)

Carbonates, Volumetric Evolution Method AOCS Official Method Da 19b-42 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines all of the carbonat

432

AOCS Official Method Da 19a-42  

Science Conference Proceedings (OSTI)

Carbonates, Gravimetric Absorption Method AOCS Official Method Da 19a-42 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines all of the carbon

433

AOCS Official Method F 1b-44  

Science Conference Proceedings (OSTI)

Moisture and Volatile Matter, Hot Plate Method AOCS Official Method F 1b-44 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the moisture a

434

AOCS Official Method Cc 9a-48  

Science Conference Proceedings (OSTI)

Smoke, Flash and Fire Points Cleveland Open Cup Method AOCS Official Method Cc 9a-48 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION These methods determine the

435

AOCS Official Method F 2c-44  

Science Conference Proceedings (OSTI)

Organically Combined Sulfuric Anhydride, Ash-Gravimetric Method AOCS Official Method F 2c-44 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determin

436

AOCS Official Method Ca 2f-93  

Science Conference Proceedings (OSTI)

Determination of Moisture and Volatile Matter in Fats and Oils Modified Method AOCS Official Method Ca 2f-93 Methods Methods and Analyses Lipid Library Methods Downloads Methods Downloads DEFINITION This method

437

AOCS Official Method M 3-82  

Science Conference Proceedings (OSTI)

Surplus Status of Methods AOCS Official Method M 3-82 Methods Downloads Methods Downloads Official Methods and Recommended Practices of the AOCS (Methods) aocs applicants certified chemist chemists fats lab laboratories laboratory lipid Methods

438

AOCS Official Method F 9b-44  

Science Conference Proceedings (OSTI)

Acidity, Method B AOCS Official Method F 9b-44 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the free (uncombined) fatty acids, which ar

439

AOCS Official Method F 1a-44  

Science Conference Proceedings (OSTI)

Moisture, Distillation Method AOCS Official Method F 1a-44 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the moisture by distillation wi

440

AOCS Official Method Ca 2a-45  

Science Conference Proceedings (OSTI)

Moisture Distillation Method AOCS Official Method Ca 2a-45 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the moisture by distillation wi

Note: This page contains sample records for the topic "bispectral threshold method" 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

AOCS Official Method Dd 2a-59  

Science Conference Proceedings (OSTI)

Moisture by the Distillation Method AOCS Official Method Dd 2a-59 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines moisture by distillation

442

AOCS Official Method Dc 2-59  

Science Conference Proceedings (OSTI)

Moisture by Distillation Method AOCS Official Method Dc 2-59 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines moisture by distillation with

443

AOCS Official Method Da 2b-42  

Science Conference Proceedings (OSTI)

Moisture, Distillation Method AOCS Official Method Da 2b-42 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the moisture by distillation w

444

AOCS Official Method Da 2a-48  

Science Conference Proceedings (OSTI)

Moisture and Volatile Matter, Air Oven Method AOCS Official Method Da 2a-48 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the moisture a

445

The Uniform Methods Project: Methods for Determining Energy Efficiency  

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

The Uniform Methods Project: Methods for Determining Energy The Uniform Methods Project: Methods for Determining Energy Efficiency Savings for Specific Measures (April 2013) The Uniform Methods Project: Methods for Determining Energy Efficiency Savings for Specific Measures (April 2013) In April 2013 the National Renewable Energy Laboratory (NREL) published the first set of protocols for determining energy savings from energy efficiency measures and programs. Funded by the Office of Electricity Delivery and Energy Reliability and the Office of Energy Efficiency and Renewable Energy, the developed protocols provide a straightforward method for evaluating gross energy savings for each of the most common residential and commercial measures and programs offered by ratepayer-funded energy efficiency programs in the US. Using a single measurement and verification

446

Method of microbially degrading trinitrotoluene  

DOE Patents (OSTI)

A method of degrading trinitrotoluene (TNT) includes contacting the TNT with intra-amoebic isolate CR-1, ATCC 75528.

Tyndall, Richard L. (Clinton, TN); Vass, Arpad (Oak Ridge, TN)

1996-01-01T23:59:59.000Z

447

Method of recovering uranium hexafluoride  

DOE Patents (OSTI)

A method of recovering uranium hexafluoride from gaseous mixtures which comprises adsorbing said uranium hexafluoride on activated carbon is described.

Schuman, S.

1975-12-01T23:59:59.000Z

448

Computational Methods in Materials Education  

Science Conference Proceedings (OSTI)

search. faq. home. FORUMS > COMPUTATIONAL METHODS ... Search Category: [ advanced search ]. rss feed. Spacer Use this area to submit digital resources ...

449

Method for decreasing arbitration overhead  

SciTech Connect

This invention is a method for decreasing the arbitration overhead required to transfer messages on a shared multiprocessor bus.

Bergey, A.L. Jr.; Coale, J.L.

1983-12-01T23:59:59.000Z

450

The P-NTUI Method  

Science Conference Proceedings (OSTI)

The heat transfer calculation method that is currently used in the nuclear industry is the corrected log mean temperature difference F-LMTD method. This method has limitations in dealing with the range of heat exchanger analysis requirements encountered in the industry. A primary objective of this report is to provide a concise, service water-focused introduction to the broader family of practical analytical methods. The intent is to inform and educate, while laying the groundwork for additional efforts ...

2010-08-30T23:59:59.000Z

451

Modern Methods for Lipid Analysis...  

Science Conference Proceedings (OSTI)

Modern Methods describes previous work that helped established the foundation of the field, while also demonstrating new data that is quickly defining a new level of “state-of-the-art.” Modern Methods for Lipid Analysis... Methods and Analyses Hardback B

452

Methods of making textured catalysts  

SciTech Connect

A textured catalyst having a hydrothermally-stable support, a metal oxide and a catalyst component is described. Methods of conducting aqueous phase reactions that are catalyzed by a textured catalyst are also described. The invention also provides methods of making textured catalysts and methods of making chemical products using a textured catalyst.

Werpy, Todd (West Richland, WA); Frye, Jr., John G. (Richland, WA); Wang, Yong (Richland, WA); Zacher, Alan H. (Kennewick, WA)

2010-08-17T23:59:59.000Z

453

Formal methods: Practice and experience  

Science Conference Proceedings (OSTI)

Formal methods use mathematical models for analysis and verification at any part of the program life-cycle. We describe the state of the art in the industrial use of formal methods, concentrating on their increasing use at the earlier stages of specification ... Keywords: Experimental software engineering, formal methods surveys, grand challenges, verified software initiative, verified software repository

Jim Woodcock; Peter Gorm Larsen; Juan Bicarregui; John Fitzgerald

2009-10-01T23:59:59.000Z

454

The combined Lagrangian advection method  

Science Conference Proceedings (OSTI)

We present and test a new hybrid numerical method for simulating layerwise-two-dimensional geophysical flows. The method radically extends the original Contour-Advective Semi-Lagrangian (CASL) algorithm [5] by combining three computational elements for ... Keywords: Contour advection, Pseudo-spectral, Two-dimensional turbulence, Vortex methods

David G. Dritschel; Jérôme Fontane

2010-07-01T23:59:59.000Z

455

Study And Comparison Of Silver Mirrors Deposited On Different Substrates By Electron-Beam Gun Method  

SciTech Connect

Choosing the right substrate is one of the important factors for improving quality parameters of thin films such as adhesion between layers and substrates. The selected substrate should have proper physical and chemical compatibility with deposited thin film. In this paper, we have been investigated four different types of high reflective laser mirrors that were produced in similar conditions on four different kinds of substrates including copper, stainless steel, brass, and nickel. We used electron-beam gun method for deposition of silver layers. At the end we compared theoretical results with practical results that were yielded by laser damage threshold test. It was shown that brass is the best choice for silver metal mirrors as a substrate.

Asl, Jahanbakhsh Mashaiekhy; Shafieizadeh, Zahra; Sabbaghzadeh, Jamshid; Anaraki, Mahdi [Iranian National Center for Laser Science and Technology, PO Box 14665-576, Tehran (Iran, Islamic Republic of)

2010-12-23T23:59:59.000Z

456

Method of and apparatus for producing hydrogen and oxygen by photoelectrically-induced electrolysis  

SciTech Connect

A method of producing hydrogen and oxygen from an electrolytic solution in an electrolytic cell is described comprising the step S of: forming a relatively thin layer of the electrolytic solution on an anode; passing light through the relatively thin layer to ionize the electrolytic solution in the relatively thin layer to form oxygen adjacent the anode and to heat the solution in the layer; circulating the fluid in the electrolytic cell due to heating of the relatively thin layer to move the solution past a cathode electrically connected to the anode, preventing current from flowing from between the cathode and anode until the potential reaches a predetermined threshold thereby generating hydrogen gas at the cathdoe, and collecting the hydrogen gas as the gas froms at the cathode.

Fowler, H.

1980-07-08T23:59:59.000Z

457

System, method and computer-readable medium for locating physical phenomena  

DOE Patents (OSTI)

A method, system and computer product for detecting the location of a deformation of a structure includes baselining a defined energy transmitting characteristic for each of the plurality of laterally adjacent conductors attached to the structure. Each of the plurality of conductors includes a plurality of segments coupled in series and having an associated unit value representative of the defined energy transmitting characteristic. The plurality of laterally adjacent conductors includes a plurality of identity groups with each identity group including at least one of the plurality of segments from each of the plurality of conductors. Each of the plurality of conductors are monitored for a difference in the defined energy transmitting characteristic when compared with a baseline energy transmitting characteristic for each of the plurality of conductors. When the difference exceeds a threshold value, a location of the deformation along the structure is calculated.

Weseman, Matthew T [Idaho Falls, ID; Rohrbaugh, David T [Idaho Falls, ID; Richardson, John G [Idaho Falls, ID

2008-02-26T23:59:59.000Z

458

AOCS Official Method Cb 6-86  

Science Conference Proceedings (OSTI)

Aflatoxins M1 and M2 in Dairy Products AOCS Official Method Cb 6-86 Methods Analytical Chemistry Methods Downloads Methods Downloads Methods and Analyses DEFINITION This method determines aflatoxins M 1...

459

AOCS Official Method Bb 2-38  

Science Conference Proceedings (OSTI)

Oil AOCS Official Method Bb 2-38 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the substances extracted by petroleum ether under the con

460

AOCS Official Method Bd 3-52  

Science Conference Proceedings (OSTI)

Oil AOCS Official Method Bd 3-52 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the substances extracted by commercial hexane under the c

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


461

AOCS Official Method Ce 2-66  

Science Conference Proceedings (OSTI)

Preparation of Methyl Esters of Fatty Acids AOCS Official Method Ce 2-66 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method provides a means for prepari

462

AOCS Official Method Ch 1-91  

Science Conference Proceedings (OSTI)

Preparation of Methyl Esters of Long-Chain Fatty Acids AOCS Official Method Ch 1-91 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method provides a means

463

AOCS Official Method Da 8-48  

Science Conference Proceedings (OSTI)

Total Anhydrous Soap and Combined Alkali AOCS Official Method Da 8-48 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the total anhydrous

464

AOCS Official Method F 4-44  

Science Conference Proceedings (OSTI)

Total Active Ingredients AOCS Official Method F 4-44 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the total active ingredients as they

465

AOCS Official Method Ch 2-91  

Science Conference Proceedings (OSTI)

Determination of Fatty Acids in Olive Oils by Capillary GLC AOCS Official Method Ch 2-91 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method is for the d

466

AOCS Official Method Cd 26-96  

Science Conference Proceedings (OSTI)

Stigmastadienes in Vegetable Oils AOCS Official Method Cd 26-96 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This is a rigorous method for the determination o

467

AOCS Official Method Cd 25-96  

Science Conference Proceedings (OSTI)

Heat Transfer Fluids in Oils – Dowtherm TM by GC AOCS Official Method Cd 25-96 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines t

468

AOCS Official Method Da 28-39  

Science Conference Proceedings (OSTI)

Screen Test AOCS Official Method Da 28-39 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the relative degree of fineness of the sample....

469

AOCS Official Method Dd 5-92  

Science Conference Proceedings (OSTI)

Determination of Sodium Linear Alkylbenzene Sulfonate (LAS) Color AOCS Official Method Dd 5-92 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determ

470

AOCS Official Method Da 26-42  

Science Conference Proceedings (OSTI)

Volatile Hydrocarbons AOCS Official Method Da 26-42 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines hydrocarbons which are volatile with s

471

AOCS Official Method F 10-44  

Science Conference Proceedings (OSTI)

Water-Immiscible Organic Solvents AOCS Official Method F 10-44 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines water-immiscible organic so

472

AOCS Official Method Cd 27-96  

Science Conference Proceedings (OSTI)

Steroidal Hydrocarbons in Vegetable Oils AOCS Official Method Cd 27-96 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method should be used for the determi

473

AOCS Official Method Da 4a-48  

Science Conference Proceedings (OSTI)

Free Acid or Free Alkali AOCS Official Method Da 4a-48 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the free (uncombined) acid or alkal

474

AOCS Official Method Db 3-48  

Science Conference Proceedings (OSTI)

Free Acid or Free Alkali AOCS Official Method Db 3-48 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the free (uncombined) acid as oleic

475

AOCS Official Method Cd 3e-02  

Science Conference Proceedings (OSTI)

Determination of Alkalinity in Fats and Oils AOCS Official Method Cd 3e-02 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the alkalinity

476

AOCS Official Method Cd 1c-85  

Science Conference Proceedings (OSTI)

Calculated Iodine Value AOCS Official Method Cd 1c-85 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the iodine value for edible oils dir

477

AOCS Official Method Da 31-58  

Science Conference Proceedings (OSTI)

Copper AOCS Official Method Da 31-58 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines trace quantities of copper in soap and soap products.

478

AOCS Official Method Bc 4-91  

Science Conference Proceedings (OSTI)

Nitrogen-Ammonia-Protein Modified Kjeldahl Method Titanium Dioxide + Copper Sulfate Catalyst AOCS Official Method Bc 4-91 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION

479

AOCS Official Method M 2-09  

Science Conference Proceedings (OSTI)

Writing and Approval of Methods AOCS Official Method M 2-09 Methods Downloads Methods Downloads Official Methods and Recommended Practices of the AOCS (Methods) aocs applicants certified chemist chemists fats lab laboratories laboratory lipid Me

480

AOCS Official Method Da 22-48  

Science Conference Proceedings (OSTI)

Sulfates AOCS Official Method Da 22-48 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines all of the water-soluble inorganic sulfates in the

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


481

AOCS Official Method Da 15-48  

Science Conference Proceedings (OSTI)

Iodine Value, Wijs Method AOCS Official Method Da 15-48 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION The iodine value is a measure of the unsaturation of the

482

AOCS Official Method Da 6-48  

Science Conference Proceedings (OSTI)

Water-Insoluble Matter AOCS Official Method Da 6-48 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines water-insoluble matter in the sample....

483

AOCS Official Method Da 13-48  

Science Conference Proceedings (OSTI)

Titer Test AOCS Official Method Da 13-48 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the solidification point of the fatty acids....

484

AOCS Official Method Tn 2a-86  

Science Conference Proceedings (OSTI)

Flash Point of Fatty Quaternary Ammonium Chloride, Closed Cup Method (Modified Closed Cup Method, ASTM Designation D 93-80) AOCS Official Method Tn 2a-86 Methods Downloads Methods Downloads DEFINITION This method

485

AOCS Official Method Cj 4-00  

Science Conference Proceedings (OSTI)

Spreadability AOCS Official Method Cj 4-00 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines a measure of spreadability of semi-solid m

486

AOCS Official Method Ce 5c-93  

Science Conference Proceedings (OSTI)

Individual Triglycerides in Oils and Fats by HPLC AOCS Official Method Ce 5c-93 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method is for the separation

487

AOCS Official Method Ba 6-84  

Science Conference Proceedings (OSTI)

Crude Fiber AOCS Official Method Ba 6-84 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines, as crude fiber, the loss on incineration of the

488

AOCS Official Method Cj 1-94  

Science Conference Proceedings (OSTI)

DSC Melting Properties of Fats and Oils AOCS Official Method Cj 1-94 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION The method determines thermal properties of

489

AOCS Official Method Ca 3c-01  

Science Conference Proceedings (OSTI)

Detection of a Volatile Organic Contaminant by GC-MS AOCS Official Method Ca 3c-01 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method describes the dete

490

AOCS Official Method Cd 25b-07  

Science Conference Proceedings (OSTI)

Thermal Heating Fluids in Vegetable Oils AOCS Official Method Cd 25b-07 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method quantitatively determines the

491

AOCS Official Method Ci 2-91  

Science Conference Proceedings (OSTI)

Detection of Triglyceride Adulteration of Jojoba Oil AOCS Official Method Ci 2-91 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION The method uses thin-layer chro

492

AOCS Official Method Ca 3a-46  

Science Conference Proceedings (OSTI)

Insoluble Impurities AOCS Official Method Ca 3a-46 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines dirt, meal, and other foreign substance

493

AOCS Official Method Cc 13e-92  

Science Conference Proceedings (OSTI)

Color Lovibond Method Using Color Glasses Calibrated in Accordance with the Lovibond Tintometer Color Scale AOCS Official Method Cc 13e-92 Methods Methods and Analyses Methods Downloads Methods Downloads Analytical Chemistry D

494

AOCS Official Method Cd 11d-96  

Science Conference Proceedings (OSTI)

Mono- and Diglycerides Determination by HPLC-ELSD AOCS Official Method Cd 11d-96 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This standard describes a method

495

AOCS Official Method Cj 2-95  

Science Conference Proceedings (OSTI)

X-Ray Diffraction Analysis of Fats AOCS Official Method Cj 2-95 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION The method determines the short and long spacing

496

AOCS Official Method Dc 5-59  

Science Conference Proceedings (OSTI)

Combined Alcohols AOCS Official Method Dc 5-59 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines total fatty alcohols and permits estimation

497

AOCS Official Method Dc 6-59  

Science Conference Proceedings (OSTI)

Alkalinity AOCS Official Method Dc 6-59 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the alkalinity or acidity of fatty alkyl sulfates.

498

AOCS Official Method Dc 7-59  

Science Conference Proceedings (OSTI)

Sodium Sulfate AOCS Official Method Dc 7-59 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the sodium sulfate in fatty alkyl sulfates by

499

AOCS Official Method Dc 3a-59  

Science Conference Proceedings (OSTI)

Alcohol-Soluble Matter AOCS Official Method Dc 3a-59 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines the total alcohol-soluble matter in a

500

AOCS Official Method Dc 8-59  

Science Conference Proceedings (OSTI)

Unsulfated Material AOCS Official Method Dc 8-59 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION This method determines unsulfated fatty alcohols in fatty alkyl