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Note: This page contains sample records for the topic "field time offset" 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.


1

Performance analysis of space-time block codes in flat fading MIMO channels with offsets  

Science Conference Proceedings (OSTI)

We consider the effect of imperfect carrier offset compensation on the performance of space-time block codes. The symbol error rate (SER) for orthogonal space-time block code (OSTBC) is derived here by taking into account the carrier offset and the resulting ...

Manav R. Bhatnagar; R. Vishwanath; Vaibhav Bhatnagar

2007-01-01T23:59:59.000Z

2

DECORRELATION TIMES OF PHOTOSPHERIC FIELDS AND FLOWS  

SciTech Connect

We use autocorrelation to investigate evolution in flow fields inferred by applying Fourier local correlation tracking (FLCT) to a sequence of high-resolution (0.''3), high-cadence ({approx_equal} 2 minute) line-of-sight magnetograms of NOAA active region (AR) 10930 recorded by the narrowband filter imager of the Solar Optical Telescope aboard the Hinode satellite over 2006 December 12 and 13. To baseline the timescales of flow evolution, we also autocorrelated the magnetograms, at several spatial binnings, to characterize the lifetimes of active region magnetic structures versus spatial scale. Autocorrelation of flow maps can be used to optimize tracking parameters, to understand tracking algorithms' susceptibility to noise, and to estimate flow lifetimes. Tracking parameters varied include: time interval {Delta}t between magnetogram pairs tracked, spatial binning applied to the magnetograms, and windowing parameter {sigma} used in FLCT. Flow structures vary over a range of spatial and temporal scales (including unresolved scales), so tracked flows represent a local average of the flow over a particular range of space and time. We define flow lifetime to be the flow decorrelation time, {tau}. For {Delta}t > {tau}, tracking results represent the average velocity over one or more flow lifetimes. We analyze lifetimes of flow components, divergences, and curls as functions of magnetic field strength and spatial scale. We find a significant trend of increasing lifetimes of flow components, divergences, and curls with field strength, consistent with Lorentz forces partially governing flows in the active photosphere, as well as strong trends of increasing flow lifetime and decreasing magnitudes with increases in both spatial scale and {Delta}t.

Welsch, B. T. [Space Sciences Laboratory, University of California, Berkeley, CA 94720-7450 (United States); Kusano, K.; Yamamoto, T. T. [Solar Terrestrial Environment Laboratory, Nagoya University Furo-cho, Chikusa-ku, Nagoya 464-8601 (Japan); Muglach, K. [Code 674, NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)

2012-03-10T23:59:59.000Z

3

Offset Printing, Production Services  

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

Printing Printing Our full service print shop provides prepress services, single and multicolor offset printing, and complete bindery. We print Reports Forms Brochures, leaflets and flyers Name tags and meal tickets Newsletters, etc Prepress Electronic files and paper copy prepared for printing. Complete Bindery Apply address labels or tabs to printed material. Machine fold documents and insert into envelopes for mailing. Laminate printed items up to 35" wide. Numbering and perforating. Trimming, drilling, padding and stitching. Special Printing Special reports, full color printing, continuous and carbon forms printed through the U.S. Government Printing Office. Additional Information Printing can be reached on X2953 The supervisor is Rick Backofen who can be reached on X6183

4

Linear Electric Field Time-Of-Flight Ion Mass Spectrometers  

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

Linear Electric Field Time-Of-Flight Ion Mass Spectrometers Linear Electric Field Time-Of-Flight Ion Mass Spectrometers Time-of-flight mass spectrometer comprising a first drift...

5

Particle energization through time-periodic helical magnetic fields  

E-Print Network (OSTI)

We solve for the motion of charged particles in a helical time-periodic ABC (Arnold-Beltrami-Childress) magnetic field. The magnetic field lines of a stationary ABC field with $A=B=C=1$ are chaotic, and we show that the motion of a charged particle in such a field is also chaotic at late time with positive Lyapunov exponent. We further show that in time-periodic (frequency $\\omega$) ABC fields the kinetic energy of a charged particle can increase indefinitely with time. At late times the mean kinetic energy grows as a power law in time with exponent $\\xi$ that approaches unity. For an initial distribution of particles, whose kinetic energy is uniformly distributed within some interval, the PDF of kinetic energy is, at late time, close to a Gaussian but with steeper tails.

Dhrubaditya Mitra; Axel Brandenburg; Brahmananda Dasgupta; Eyvind Niklasson; Abhay Ram

2013-06-01T23:59:59.000Z

6

External Time-Varying Fields and Electron Coherence  

E-Print Network (OSTI)

The effect of time-varying electromagnetic fields on electron coherence is investigated. A sinusoidal electromagnetic field produces a time varying Aharonov-Bohm phase. In a measurement of the interference pattern which averages over this phase, the effect is a loss of contrast. This is effectively a form of decoherence. We calculate the magnitude of this effect for various electromagnetic field configurations. The result seems to be sufficiently large to be observable.

Jen-Tsung Hsiang; L. H. Ford

2004-02-03T23:59:59.000Z

7

Linear Electric Field Time-Of-Flight Ion Mass Spectrometers  

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

Linear Electric Field Time-Of-Flight Ion Mass Spectrometers Linear Electric Field Time-Of-Flight Ion Mass Spectrometers Linear Electric Field Time-Of-Flight Ion Mass Spectrometers Time-of-flight mass spectrometer comprising a first drift region and a second drift region enclosed within an evacuation chamber. Available for thumbnail of Feynman Center (505) 665-9090 Email Linear Electric Field Time-Of-Flight Ion Mass Spectrometers Time-of-flight mass spectrometer comprising a first drift region and a second drift region enclosed within an evacuation chamber; a means of introducing an analyte of interest into the first drift region; a pulsed ionization source which produces molecular ions from said analyte of interest; a first foil positioned between the first drift region and the second drift region, which dissociates said molecular ions into constituent

8

Evaluating transport coefficients in real time thermal field theory  

E-Print Network (OSTI)

Transport coefficients in a hadronic gas have been calculated earlier in the imaginary time formulation of thermal field theory. The steps involved are to relate the defining retarded correlation function to the corresponding time-ordered one and to evaluate the latter in the conventional perturbation expansion. Here we carry out both the steps in the real time formulation.

S. Mallik; Sourav Sarkar

2012-11-12T23:59:59.000Z

9

Sandbag Carbon Offset Map | Open Energy Information  

Open Energy Info (EERE)

Sandbag Carbon Offset Map Sandbag Carbon Offset Map Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Sandbag Carbon Offset Map Agency/Company /Organization: Sandbag Sector: Energy, Land Focus Area: Renewable Energy, Biomass, Energy Efficiency, Forestry, Geothermal, Hydrogen, Industry, Solar, Wind Topics: Market analysis Resource Type: Maps, Software/modeling tools User Interface: Website Website: sandbag.org.uk/carbondata/cers Sandbag Carbon Offset Map Screenshot References: Sandbag Carbon Offset Map[1] Thinking about climate change can be a depressing occupation. It's a massive issue and personal actions like switching off lights and unplugging televisions can feel like small contributions. Background "Thinking about climate change can be a depressing occupation. It's a

10

Time Evolution in the external field problem of Quantum Electrodynamics  

E-Print Network (OSTI)

A general problem of quantum field theories is the fact that the free vacuum and the vacuum for an interacting theory belong to different, non-equivalent representations of the canonical (anti-)commutation relations. In the external field problem of QED, we encounter this problem in the form that the Dirac time evolution for an external field with non-vanishing magnetic components will not satisfy the Shale-Stinespring condition, known to be necessary and sufficient for the existence of an implementation on the fermionic Fock space. Therefore, a second quantization of the time evolution in the usual way is impossible. In this thesis, we present several rigorous approaches to QED with time-dependent, external fields and analyze in what sense a time evolution can exist in the second quantized theory. We study different constructions of the fermionic Fock space and prove their equivalence. We study and compare the results of Deckert et. al. (2010), where the time evolution is realized as unitary transformations ...

Lazarovici, Dustin

2013-01-01T23:59:59.000Z

11

Gas/Star Offsets in Tidal Tails  

E-Print Network (OSTI)

We use numerical simulations to study the development of gas/star offsets in the tidal tails of merging galaxies. These offsets are shown to be a natural consequence of the radially extended HI spatial distribution in disk galaxies, coupled with internal dissipation in the gaseous component driven by the interaction. This mechanism explains the observed gas/star offsets in interacting galaxies without invoking interactions with a hot (unseen) gaseous component.

Mihos, C

2000-01-01T23:59:59.000Z

12

Gas/Star Offsets in Tidal Tails  

E-Print Network (OSTI)

We use numerical simulations to study the development of gas/star offsets in the tidal tails of merging galaxies. These offsets are shown to be a natural consequence of the radially extended HI spatial distribution in disk galaxies, coupled with internal dissipation in the gaseous component driven by the interaction. This mechanism explains the observed gas/star offsets in interacting galaxies without invoking interactions with a hot (unseen) gaseous component.

Chris Mihos

2000-08-09T23:59:59.000Z

13

Time Evolution in the external field problem of Quantum Electrodynamics  

E-Print Network (OSTI)

A general problem of quantum field theories is the fact that the free vacuum and the vacuum for an interacting theory belong to different, non-equivalent representations of the canonical (anti-)commutation relations. In the external field problem of QED, we encounter this problem in the form that the Dirac time evolution for an external field with non-vanishing magnetic components will not satisfy the Shale-Stinespring condition, known to be necessary and sufficient for the existence of an implementation on the fermionic Fock space. Therefore, a second quantization of the time evolution in the usual way is impossible. In this thesis, we present several rigorous approaches to QED with time-dependent, external fields and analyze in what sense a time evolution can exist in the second quantized theory. We study different constructions of the fermionic Fock space and prove their equivalence. We study and compare the results of Deckert et. al. (2010), where the time evolution is realized as unitary transformations between time-varying Fock spaces, with those of Langmann and Mickelsson (1996), who construct a "renormalization" for the time evolution and present a method to fix the phase of the second quantized scattering operator by parallel transport in a principle fibre bundle over the restricted, general linear group acting on the fermionic Fock space. We provide rigorous proof for the fact that the second quantization by parallel transport preserves causality. These findings seem to refute claims made in Scharf (1995) that the phase of the second quantized S-matrix is essentially determined by the requirement of causality. We propose a simple solution to the problem of gauge anomalies in the procedure of Langmann and Mickelsson, showing that the second quantization of the scattering operator can be made gauge-invariant by using a suitable class of renormalizations.

Dustin Lazarovici

2013-10-07T23:59:59.000Z

14

Variational Multi-Time Green's Functions for Nonequilibrium Quantum Fields  

E-Print Network (OSTI)

The time-dependent variational principle proposed by Balian and Veneroni is used to provide the best approximation to the generating functional for multi-time Green's functions of a set of (bosonic) observables $Q_{\\mu)$. By suitably restricting the trial spaces, the computation of the two-time Green's function, obtained by a second order expansion in the sources, is considerably simplified. This leads to a tractable formalism suited to quantum fields out of equilibrium. We propose an illustration on the finite temperature ${\\bf\\Phi^4}$ theory in curved space and coupled to gravity.

Mohamed Benarous

1997-10-07T23:59:59.000Z

15

Assessing the impacts of biodiversity offset policies  

Science Conference Proceedings (OSTI)

In response to the increasing loss of native vegetation and biodiversity, a growing number of countries have adopted ''offsetting'' policies that seek to balance local habitat destruction by restoring, enhancing and/or protecting similar but separate ... Keywords: Biodiversity offsets, Conservation planning, Global sensitivity analysis, Grassland, Habitat quality, Policy modelling, Uncertainty

Ascelin Gordon; William T. Langford; James A. Todd; Matt D. White; Daniel W. Mullerworth; Sarah A. Bekessy

2011-12-01T23:59:59.000Z

16

Time evolution of fields in strontium ferrite permanent magnets  

SciTech Connect

Field strengths for strontium ferrite permanent magnets built for the Fermilab Recycler and 8 GeV transfer line have been measured for the past 4 years. The ferrite magnetization exhibits a time dependence parameterized by M1/M{sub 2} = -9 x 10{sup -4} x log (t{sub 1}/t{sub 2}) as determined from measurements of a gradient magnet. This parameterization has been checked against several other styles of permanent dipoles, and quadrupole magnets with good agreement.

James T. Volk et al.

2001-06-11T23:59:59.000Z

17

Time-aging time-stress superposition in soft glass under tensile deformation field  

E-Print Network (OSTI)

We have studied the tensile deformation behaviour of thin films of aging aqueous suspension of Laponite, a model soft glassy material, when subjected to a creep flow field generated by a constant engineering normal stress. Aqueous suspension of Laponite demonstrates aging behaviour wherein it undergoes time dependent enhancement of its elastic modulus as well as its characteristic relaxation time. However, under application of the normal stress, the rate of aging decreases and in the limit of high stress, the aging stops with the suspension now undergoing a plastic deformation. Overall, it is observed that the aging that occurs over short creep times at small normal stresses is same as the aging that occurs over long creep times at large normal stresses. This observation allows us to suggest an aging time - process time - normal stress superposition principle, which can predict rheological behaviour at longer times by carrying out short time tests.

Asima Shaukat; Ashutosh Sharma; Yogesh M. Joshi

2010-06-10T23:59:59.000Z

18

Simple Space-Time Symmetries: Generalizing Conformal Field Theory  

E-Print Network (OSTI)

We study simple space-time symmetry groups G which act on a space-time manifold M=G/H which admits a G-invariant global causal structure. We classify pairs (G,M) which share the following additional properties of conformal field theory: 1) The stability subgroup H of a point in M is the identity component of a parabolic subgroup of G, implying factorization H=MAN, where M generalizes Lorentz transformations, A dilatations, and N special conformal transformations. 2) special conformal transformations in N act trivially on tangent vectors to the space-time manifold M. The allowed simple Lie groups G are the universal coverings of SU(m,m), SO(2,D), Sp(l,R), SO*(4n) and E_7(-25) and H are particular maximal parabolic subgroups. They coincide with the groups of fractional linear transformations of Euklidean Jordan algebras whose use as generalizations of Minkowski space time was advocated by Gunaydin. All these groups G admit positive energy representations. It will also be shown that the classical conformal groups SO(2,D) are the only allowed groups which possess a time reflection automorphism; in all other cases space-time has an intrinsic chiral structure.

Gerhard Mack; Mathias de Riese

2004-10-28T23:59:59.000Z

19

Turbine blade tip with offset squealer  

DOE Patents (OSTI)

An industrial turbine assembly comprises a plurality of rotating blade portions in a spaced relation with a stationary shroud. The rotating blade includes a root section, an airfoil having a pressure sidewall and a suction sidewall defining an outer periphery and a tip portion having a tip cap. An offset squealer is disposed on the tip cap. The offset squealer is positioned inward from the outer periphery of the rotating blade. The offset squealer increases the flow resistance and reduces the flow of hot gas flow leakage for a given pressure differential across the blade tip portion so as to improve overall turbine efficiency.

Bunker, Ronald Scott (Niskayuna, NY)

2001-01-01T23:59:59.000Z

20

CARBON OFFSETTING IN A TOURSIM CONTEXT: WHISTLER BC  

E-Print Network (OSTI)

CARBON OFFSETTING IN A TOURSIM CONTEXT: WHISTLER BC by Katie von Gaza Bachelor of Environmental: Carbon offsetting in a Tourism Context: Whistler, BC. Project No.: 471 Examining Committee: Chair 2.2 Carbon Offsetting

Note: This page contains sample records for the topic "field time offset" 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

Carbon Offsets for Forestry and Bioenergy: Researching Opportunities...  

Open Energy Info (EERE)

Carbon Offsets for Forestry and Bioenergy: Researching Opportunities for Poor Rural Communities Jump to: navigation, search Name Carbon Offsets for Forestry and Bioenergy:...

22

Template:CompanyCsvPostOffsetQuery | Open Energy Information  

Open Energy Info (EERE)

template. It should be called in the following format: CompanyCsvPostOffsetQuery |cat |offset |limit |searchlabel Retrieved from "http:en.openei.orgw...

23

Developments in deep brain stimulation using time dependent magnetic fields  

SciTech Connect

The effect of head model complexity upon the strength of field in different brain regions for transcranial magnetic stimulation (TMS) has been investigated. Experimental measurements were used to verify the validity of magnetic field calculations and induced electric field calculations for three 3D human head models of varying complexity. Results show the inability for simplified head models to accurately determine the site of high fields that lead to neuronal stimulation and highlight the necessity for realistic head modeling for TMS applications.

Crowther, L.J.; Nlebedim, I.C.; Jiles, D.C.

2012-03-07T23:59:59.000Z

24

High quality offset printing: an evolutionary approach  

Science Conference Proceedings (OSTI)

Print media are still very important for everyone's daily life. Current efforts are concerned with the application of the well-established offset-printing technology to other media, particularly cardboards, which require some substantial adaptations. ... Keywords: evolutionary algorithms, image processing, industrial application

Ralf Joost; Ralf Salomon

2007-07-01T23:59:59.000Z

25

A Potential-Field Approach to Financial Time Series Modelling  

Science Conference Proceedings (OSTI)

We present a new approach to the problem of time series modelling that captures the invariant distribution of time series data within the model. This is particularly relevant in modelling economic and financial time series, such as oil prices, that ... Keywords: diffusion, multiple attraction regions, potential function, price

S. Borovkova; H. Dehling; J. Renkema; H. Tulleken

2003-10-01T23:59:59.000Z

26

Random Offset Curves and Surfaces with Controllable Noise (Extended Abstract)  

E-Print Network (OSTI)

similar complex patterns often being able to be defined with the gradient noise functions. PORN is defined by replacing a static offset distance in a general offset with a gradient noise function. For example, PORN

Lee, In-Kwon

27

Linear electronic field time-of-flight ion mass spectrometers  

DOE Patents (OSTI)

Time-of-flight mass spectrometer comprising a first drift region and a second drift region enclosed within an evacuation chamber; a means of introducing an analyte of interest into the first drift region; a pulsed ionization source which produces molecular ions from said analyte of interest; a first foil positioned between the first drift region and the second drift region, which dissociates said molecular ions into constituent atomic ions and emits secondary electrons; an electrode which produces secondary electrons upon contact with a constituent atomic ion in second drift region; a stop detector comprising a first ion detection region and a second ion detection region; and a timing means connected to the pulsed ionization source, to the first ion detection region, and to the second ion detection region.

Funsten, Herbert O. (Los Alamos, NM)

2010-08-24T23:59:59.000Z

28

Spin relaxation and linear-in-electric-field frequency shift in an arbitrary, time-independent magnetic field  

Science Conference Proceedings (OSTI)

A method is presented to calculate the spin relaxation times T{sub 1}, T{sub 2} due to a nonuniform magnetic field, and the linear-in-electric-field precession frequency shift {delta}{omega}{sub E} when an electric field is present, in the diffusion approximation for spins confined to a rectangular cell. It is found that the rectangular cell geometry admits of a general result for T{sub 1}, T{sub 2}, and {delta}{omega}{sub E} in terms of the spatial cosine-transform components of the magnetic field.

Clayton, Steven Michael [Los Alamos National Laboratory

2010-12-03T23:59:59.000Z

29

Out-of-core volume rendering for time-varying fields using a space-partitioning time (SPT) tree  

Science Conference Proceedings (OSTI)

In this paper, we propose a novel out-of-core volume rendering algorithm for large time-varying fields. Exploring temporal and spatial coherences has been an important direction for speeding up the rendering of time-varying data. Previously, there were ...

Zhiyan Du; Yi-Jen Chiang; Han-Wei Shen

2009-04-01T23:59:59.000Z

30

The Application of Time Series Models to Cloud Field Morphology Analysis  

Science Conference Proceedings (OSTI)

A modeling method for the quantitative description of remotely sensed cloud field images is presented. A two-dimensional texture modeling scheme based on one-dimensional time series procedures is adopted for this purpose. The time series ...

Roland T. Chin; Jack Y. C. Jau; James A. Weinman

1987-03-01T23:59:59.000Z

31

The design and field observation of a haptic notification system for timing awareness during oral presentations  

Science Conference Proceedings (OSTI)

To moderate oral presentations a chair must manage time, and communicate time parameters to speakers through a variety of means. But speakers often miss time cues, chairs cannot confirm their receipt, and the broken dialogue can be a sideshow for the ... Keywords: field study, oral presentation, vibrotactile, wearable haptics

Diane Tam; Karon E. MacLean; Joanna McGrenere; Katherine J. Kuchenbecker

2013-04-01T23:59:59.000Z

32

Joint Identification of Stepper Motor Parameters and of Initial Encoder Offset  

E-Print Network (OSTI)

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

Paris-Sud XI, Université de

33

On the Space–Time Scales of the Surface Solar Radiation Field  

Science Conference Proceedings (OSTI)

The characteristic space–time scales of surface solar radiation fields measured by the 111-instrument MESONET in Oklahoma are estimated after removal of the diurnal cycle. These estimates of “within-day” variability are used to deduce the ...

T. P. Barnett; J. Ritchie; J. Foat; G. Stokes

1998-01-01T23:59:59.000Z

34

The Effective Number of Spatial Degrees of Freedom of a Time-Varying Field  

Science Conference Proceedings (OSTI)

The authors systematically investigate two easily computed measures of the effective number of spatial degrees of freedom (ESDOF), or number of independently varying spatial patterns, of a time-varying field of data. The first measure is based on ...

Christopher S. Bretherton; Martin Widmann; Valentin P. Dymnikov; John M. Wallace; Ileana Bladé

1999-07-01T23:59:59.000Z

35

Carbon Offsets for Forestry and Bioenergy: Researching Opportunities for  

Open Energy Info (EERE)

Carbon Offsets for Forestry and Bioenergy: Researching Opportunities for Carbon Offsets for Forestry and Bioenergy: Researching Opportunities for Poor Rural Communities Jump to: navigation, search Name Carbon Offsets for Forestry and Bioenergy: Researching Opportunities for Poor Rural Communities Agency/Company /Organization Overseas Development Institute Sector Energy, Land Focus Area Renewable Energy, Biomass, Forestry Topics Policies/deployment programs, Background analysis Resource Type Publications Website http://www.odi.org.uk/resource Country Uganda, India Eastern Africa, Southern Asia References Carbon Offsets for Forestry and Bioenergy: Researching Opportunities for Poor Rural Communities[1] Summary "This report presents findings from a research study in Uganda and India looking at the opportunities that carbon offset projects offer for poor

36

Magnetars: Time Evolution, Superfluid Properties, and Mechanism of Magnetic Field Decay  

E-Print Network (OSTI)

We calculate the coupled thermal evolution and magnetic field decay in relativistic model neutron stars threaded by superstrong magnetic fields (B > 10^{15} G). Our main goal is to evaluate how such ``magnetars'' evolve with time and how field decay modifies the transitions to core superfluidity and cooling dominated by surface X-ray emission. Observations of a thermal X-ray spectral component and fast timing noise place strong constraints on the presence of a superfluid core. We find that the transition to core superfluidity can be significantly delayed by field decay in the age range ~ 10^3-10^5 yrs. The mechanism of Hall drift is related to the stability of the core magnetic field, and to currents flowing outward through the crust. The heating effect is enhanced if it is continuous rather than spasmodic. Condensation of a heavy element layer at the surface is shown to cause only modest changes in the outward conduction of heat.

P. Arras; A. Cumming; C. Thompson

2004-01-27T23:59:59.000Z

37

Interpretation of long-offset transient electromagnetic data fromMount Merapi, Indonesia, using a three-dimensional optimizationapproach  

SciTech Connect

In the years 1998, 2000, and 2001, long-offset transientelectromagnetic (LOTEM) surveys were carried out at the active volcanoMerapi in Central Java. The measurements investigated the conductivitystructure of the volcanic edifice. Our area of interest, which is belowthe summit and the upper flanks, was investigated using horizontal andvertical magnetic field time derivative data from seventransmitter-receiver setups. Because of topography and athree-dimensional (3-D) underground structure, a 3-D interpretation isused. The method optimizes few parameters of a 3-D model by a stableleast squares joint inversion of the data, providing sufficientresolution capability. Reasonable data fits are achieved with anonhorizontally layered model featuring a very conductive basement belowdepths of 1.5 km. While hydrothermal alteration is also considered, wetentatively explain the high conductivities by aqueous solutions withrelatively high salt contents. A large magma body or a small superficialreservoir below Merapi's central volcanic complex, as discussed by otherauthors, cannot be resolved by the LOTEM data.

Commer, Michael; Helwig, Stefan L.; Hordt, Andreas; Tezkan, Bulent

2004-06-02T23:59:59.000Z

38

Space-Borne Measurements of the Time-Dependent Geostrophic Ocean Flow Field  

Science Conference Proceedings (OSTI)

A method is presented that can provide high-resolution (in space and time) satellite measurements of the absolute and time-varying surface geostrophic flow field. Based on the analysis of a high-resolution circulation model of the North Atlantic, ...

Detlef Stammer; Christian Dieterich

1999-09-01T23:59:59.000Z

39

Photon emission in a constant magnetic field in 2+1 dimensional space-time  

E-Print Network (OSTI)

We calculate by the proper-time method the amplitude of the two-photon emission by a charged fermion in a constant magnetic field in (2+1)-dimensional space-time. The relevant dynamics reduces to that of a supesymmetric quantum-mechanical system with one bosonic and one fermionic degrees of freedom.

J. T. S. Amaral; S. I. Zlatev

2005-05-11T23:59:59.000Z

40

Quasi-real-time analysis of dynamic near field scattering data using a graphics processing unit  

E-Print Network (OSTI)

We present an implementation of the analysis of dynamic near field scattering (NFS) data using a graphics processing unit (GPU). We introduce an optimized data management scheme thereby limiting the number of operations required. Overall, we reduce the processing time from hours to minutes, for typical experimental conditions. Previously the limiting step in such experiments, the processing time is now comparable to the data acquisition time. Our approach is applicable to various dynamic NFS methods, including shadowgraph, Schlieren and differential dynamic microscopy.

Giovanni Cerchiari; Fabrizio Croccolo; Frédéric Cardinaux; Frank Scheffold

2012-09-15T23:59:59.000Z

Note: This page contains sample records for the topic "field time offset" 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

Creation of quasiparticles in graphene by a time-dependent electric field  

E-Print Network (OSTI)

We investigate the creation of massless quasiparticle pairs from the vacuum state in graphene by the space homogeneous time-dependent electric field. For this purpose the formalism of (2+1)-dimensional quantum electrodynamics is applied to the case of a nonstationary background with arbitrary time dependence allowing the S-matrix formulation of the problem. The number of created pairs per unit graphene area is expressed via the asymptotic solution at $t\\to\\infty$ of the second-order differential equation of an oscillator type with complex frequency satisfying some initial conditions at $t\\to-\\infty$. The obtained results are applied to the electric field with specific dependence on time admitting the exact solution of Dirac equation. The number of created pairs per unit area is calculated analytically in a wide variety of different regimes depending on the parameters of electric field. The investigated earlier case of static electric field is reproduced as a particular case of our formalism. It is shown that the creation rate in a time-dependent field is often larger than in a static field.

G. L. Klimchitskaya; V. M. Mostepanenko

2013-05-24T23:59:59.000Z

42

Azimuthal Offset-Dependent Attributes (AVO And FVO) Applied To Fracture Detection  

E-Print Network (OSTI)

Using the amplitude versus offset (AVO) and the frequency versus offset (FVO) information, the diagnostic ability of P-wave seismic data in fracture detection is investigated. The offset-dependent attributes (AVO and FVO) ...

Shen, Feng

1999-01-01T23:59:59.000Z

43

The Development of Gas/Star Offsets in Tidal Tails  

E-Print Network (OSTI)

We present models of interacting galaxies in order to study the development of spatial offsets between the gaseous and stellar components in tidal tails. Observationally, such offsets are observed to exist over large scales (e.g., NGC 3690; Hibbard et al. 2000), suggesting an interaction between the tidal gas and some (unseen) hot ISM. Instead, our models show these offsets are a natural consequence of the radially extended HI spatial distribution in disk galaxies, coupled with internal dissipation in the gaseous component driven by the interaction. This mechanism is most effective in systems involved in very prograde interactions, and explains the observed gas/star offsets in interacting galaxies without invoking interactions with a hot ISM, starburst ionization, or dust obscuration within the tails.

Chris Mihos

2000-11-06T23:59:59.000Z

44

The Development of Gas/Star Offsets in Tidal Tails  

E-Print Network (OSTI)

We present models of interacting galaxies in order to study the development of spatial offsets between the gaseous and stellar components in tidal tails. Observationally, such offsets are observed to exist over large scales (e.g., NGC 3690; Hibbard et al. 2000), suggesting an interaction between the tidal gas and some (unseen) hot ISM. Instead, our models show these offsets are a natural consequence of the radially extended HI spatial distribution in disk galaxies, coupled with internal dissipation in the gaseous component driven by the interaction. This mechanism is most effective in systems involved in very prograde interactions, and explains the observed gas/star offsets in interacting galaxies without invoking interactions with a hot ISM, starburst ionization, or dust obscuration within the tails.

Mihos, C

2001-01-01T23:59:59.000Z

45

Generation of multiscale magnetic field by parity-invariant time-periodic flows  

E-Print Network (OSTI)

We study generation of magnetic fields involving large spatial scales by time- and space-periodic small-scale parity-invariant flows. The anisotropic magnetic eddy diffusivity tensor is calculated by the standard procedure involving expansion of magnetic modes and their growth rates in power series in the scale ratio. Our simulations, conducted for flows with random harmonic composition and exponentially decaying energy spectra, demonstrate that enlargement of the spatial scale of magnetic field is beneficial for generation by time-periodic flows. However, they turn out, in general, to be less efficient dynamos, than steady flows.

V. A. Zheligovsky; O. M. Podvigina

2002-07-28T23:59:59.000Z

46

The EPRI Greenhouse Gas Emissions Offset Policy Dialogue  

Science Conference Proceedings (OSTI)

In 2008, EPRI launched the EPRI Greenhouse Gas (GHG) Emissions Offset Policy Dialogue project. The goals of this project are to inform key constituencies involved in the development of U.S. climate mitigation strategies and policies about GHG emissions offset-related policies and design issues, and to provide a forum in which representatives of key sectors of the U.S. economy and communities involved in the ongoing development and debate on climate change policies can discuss these issues. This Technical...

2008-12-23T23:59:59.000Z

47

PWR Axial Offset Anomaly (AOA) Guidelines, Revision 1  

Science Conference Proceedings (OSTI)

Axial offset anomaly (AOA) is defined as a significant negative axial offset deviation from the predicted nuclear design value. AOA results from the incorporation of boron within corrosion product deposits on the upper spans of high-duty pressurized water reactor (PWR) fuel assemblies. The consequences of this process are an erosion of shutdown margin and loss of operational flexibility by control room operators, particularly during power transients.

2004-06-28T23:59:59.000Z

48

Precision timing of PSR J1012+5307 and strong-field GR tests  

E-Print Network (OSTI)

We report on the high precision timing analysis of the pulsar-white dwarf binary PSR J1012+5307. Using 15 years of multi-telescope data from the European Pulsar Timing Array (EPTA) network, a significant measurement of the variation of the orbital period is obtained. Using this ideal strong-field gravity laboratory we derive theory independent limits for both the dipole radiation and the variation of the gravitational constant.

Lazaridis, Kosmas; Jessner, Axel; Kramer, Michael; Zensus, J Anton; Stappers, Ben W; Janssen, Gemma H; Purver, Mark B; Lyne, Andrew G; Jordan, Christine A; Desvignes, Gregory; Cognard, Ismael; Theureau, Gilles

2010-01-01T23:59:59.000Z

49

Precision timing of PSR J1012+5307 and strong-field GR tests  

E-Print Network (OSTI)

We report on the high precision timing analysis of the pulsar-white dwarf binary PSR J1012+5307. Using 15 years of multi-telescope data from the European Pulsar Timing Array (EPTA) network, a significant measurement of the variation of the orbital period is obtained. Using this ideal strong-field gravity laboratory we derive theory independent limits for both the dipole radiation and the variation of the gravitational constant.

Kosmas Lazaridis; Norbert Wex; Axel Jessner; Michael Kramer; J. Anton Zensus; Ben W. Stappers; Gemma H. Janssen; Mark B. Purver; Andrew G. Lyne; Christine A. Jordan; Gregory Desvignes; Ismael Cognard; Gilles Theureau

2010-01-26T23:59:59.000Z

50

Field Test to Demonstrate Real-Time In-Situ Detection of Volatile Organic Compounds  

E-Print Network (OSTI)

1 Field Test to Demonstrate Real-Time In-Situ Detection of Volatile Organic Compounds Hazmat Spill Center, Nevada Test Site September 19-25, 2001 Clifford K. Ho Sandia National Laboratories Albuquerque-filled 55- gallon drum at the Hazmat Spill Center at the Nevada Test Site. Background and Objectives Tens

Ho, Cliff

51

Time-to-space conversion in quantum field theory of flavor mixing  

E-Print Network (OSTI)

We consider the problem of time-to-space conversion in quantum field theory of flavor mixing using a generalization of the wave-packet method in quantum mechanics. We work entirely within the canonical formalism of creation and annihilation operators that allows us, unlike the usual wave-packet formulation, to include the nontrivial effect due to flavor condensation in the vacuum.

Chueng-Ryong Ji; Yuriy Mishchenko

2004-03-07T23:59:59.000Z

52

Night-time naturally ventilated offices: Statistical simulations of window-use patterns from field monitoring  

Science Conference Proceedings (OSTI)

This paper investigates occupant behaviour of window-use in night-time naturally ventilated offices on the basis of a pilot field study, conducted during the summers of 2006 and 2007 in Cambridge, UK, and then demonstrates the effects of employing night-time ventilation on indoor thermal conditions using predictive models of occupant window-use. A longitudinal field study shows that occupants make good use of night-time natural ventilation strategies when provided with openings that allow secure ventilation, and that there is a noticeable time of day effect in window-use patterns (i.e. increased probability of action on arrival and departure). We develop logistic models of window-use for night-time naturally ventilated offices, which are subsequently applied to a behaviour algorithm, including Markov chains and Monte Carlo methods. The simulations using the behaviour algorithm demonstrate a good agreement with the observational data of window-use, and reveal how building design and occupant behaviour collectively affect the thermal performance of offices. They illustrate that the provision of secure ventilation leads to more frequent use of the window, and thus contributes significantly to the achievement of a comfortable indoor environment during the daytime occupied period. For example, the maximum temperature for a night-time ventilated office is found to be 3 C below the predicted value for a daytime-only ventilated office. (author)

Yun, Geun Young [Department of Architectural Engineering, Kyung Hee University, Yongin 446-701 (Korea); Steemers, Koen [Department of Architecture, University of Cambridge, 1-5 Scroope Terrace, Cambridge CB2 1PX (United Kingdom)

2010-07-15T23:59:59.000Z

53

Homebuyer Solar Option and Solar Offset Program | Department of Energy  

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

Homebuyer Solar Option and Solar Offset Program Homebuyer Solar Option and Solar Offset Program Homebuyer Solar Option and Solar Offset Program < Back Eligibility Residential Savings Category Solar Buying & Making Electricity Program Info State California Program Type Building Energy Code Provider California Energy Commission [http://www.energy.ca.gov/2009-SOPR-1/documents/sb_1_bill_20060821_chapte... Senate Bill 1 of 2006], which established the statewide California Solar Initiative, also required the California Energy Commission (CEC) to implement regulations that require sellers of production homes to offer a solar energy system option to all prospective homebuyers. Besides offering solar as an option to prospective homebuyers, sellers of homes constructed on land for which an application for a tentative subdivision map has been

54

Countries Commit to White Roofs, Potentially Offsetting the Emissions of  

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

Countries Commit to White Roofs, Potentially Offsetting the Countries Commit to White Roofs, Potentially Offsetting the Emissions of Over 300 Power Plants Countries Commit to White Roofs, Potentially Offsetting the Emissions of Over 300 Power Plants April 8, 2011 - 4:26pm Addthis Dr. Art Rosenfeld Distinguished Scientist Emeritus at Lawrence Berkeley National Laboratory What does this project do? Builds energy savings. Promotes heat island mitigation and public health benefits. Encourages global cooling. I am delighted to learn that India, Mexico, and the United States have signed up to join the Cool Roofs Working Group, announced yesterday at the second Clean Energy Ministerial in Abu Dhabi. This working group was offered as part of the Clean Energy Ministerial, which is a high-level global forum to promote policies and programs that advance clean energy

55

The Cost of Superconducting Magnets as a Function of Stored Energy and Design Magnetic Induction Times the Field Volume  

E-Print Network (OSTI)

magnets to the magnetic energy stored within that magnet.the sample have stored magnetic energies as low as 3.3 M J (plotted against stored energy and magnetic field time field

Green, M.A.

2008-01-01T23:59:59.000Z

56

Analytical time domain electromagnetic field propagators and closed-form solutions for transmission lines  

E-Print Network (OSTI)

An analytical solution for the coupled telegrapher’s equations in terms of the voltage and current on a homogeneous lossy transmission line and multiconductor transmission line is presented. The resulting telegrapher’s equation solution is obtained in the form of an exact time domain propagator operating on the line voltage and current. It is shown that the analytical equations lead to a stable numerical method that can be used in the analysis of both homogeneous and inhomogeneous transmission lines. A numerical dispersion relation is derived proving that this method has no numerical dispersion down to the two points per wavelength Nyquist limit. Examples are presented showing that exceptionally accurate results are obtained for lossy single and multiconductor transmission lines. The method is extended to represent the general solution to Maxwell’s differential equations in vector matrix form. It is shown that, given the electromagnetic field and boundary conditions at a given instant in time, the free space time domain propagator and corresponding dyadic Green’s functions in 1-, 2-, and 3-dimensions can be used to calculate the field at all subsequent times.

Jeong, Jaehoon

2006-12-01T23:59:59.000Z

57

BPM button characterization for offset calibration  

SciTech Connect

In this note, a basic theory of wave propagation in dielectric media is discussed in conjunction with S parameters to derive the button gain coefficient g{sub e} and an analytic expression for the signal from time domain reflectometry (TDR) measurement on a cable and a button. The results can be used to measure the button capacitance and the characteristic impedances of the cable and the button feedthrough. Since g{sub e} is a function of S parameters and the button capacitance C{sub p}, a suggestion is made to make the gain coefficients the same for all four buttons in a BPM by carefully matching the buttons and the cables.

Chung, Y.

1992-03-01T23:59:59.000Z

58

Proceedings of the Axial Offset Anomaly (AOA) Science Workshop  

Science Conference Proceedings (OSTI)

This report presents proceedings of the Axial Offset Anomaly (AOA) Science Workshop, held February 10-11 in Palo Alto, California. Twenty-two papers were presented on various aspects of AOA by utilities, EPRI Robust Fuel Program contractors, staff from EPRI and universities, international researchers, and equipment vendors.

2000-06-27T23:59:59.000Z

59

Proceedings of the Axial Offset Anomaly (AOA) Science Workshop  

SciTech Connect

This report presents proceedings of the Axial Offset Anomaly (AOA) Science Workshop, held February 10-11 in Palo Alto, California. Twenty-two papers were presented on various aspects of AOA by utilities, EPRI Robust Fuel Program contractors, staff from EPRI and universities, international researchers, and equipment vendors.

None

2003-06-01T23:59:59.000Z

60

The Cost of Superconducting Magnets as a Function of Stored Energy and Design Magnetic Induction Times the Field Volume  

E-Print Network (OSTI)

costs given magnet stored-energy or average bore induction timecost will go up with stored energy and with field volume timesCost of Superconducting Magnets as a Function of Stored Energy and Design Magnetic Induction times

Green, M.A.

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "field time offset" 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

Renormalization of quantum field theory on curved space-times, a causal approach  

E-Print Network (OSTI)

The subject of the thesis is the construction of a perturbative quantum theory of interacting fields on a curved space-time, following a point of view pioneered by Stueckelberg and Bogoliubov and developed by Epstein-Glaser on the flat Minkowski space-time. In 2000, a breakthrough was done by Brunetti and Fredenhagen who were able to extend the Epstein-Glaser theory by exploiting the point of view developed by Radzikowski to define quantum states on a curved space-time in terms of wave-front sets. These results were further extended by Fredenhagen, Brunetti, Hollands, Wald, Rejzner, etc. to Yang-Mills fields and the gravitation. However, even for theories without gauge invariance, many mathematical details were left unexplored and unquestioned. Our task was precisely to derive fully rigorously this theory in the case there is no gauge invariance. We propose in our work a complete review of the result, solving numerous questions, adding many new results around this program and, eventually, giving more precise details on the counterterms and ambiguities in the renormalization process, and a deeper understanding of the geometry of the wave front set of the n-point functions.

Nguyen Viet Dang

2013-12-19T23:59:59.000Z

62

Correlated time derivatives of current, electric field intensity, and magnetic flux density for triggered lightning at 15 m  

E-Print Network (OSTI)

Correlated time derivatives of current, electric field intensity, and magnetic flux density current and its time derivative correlated with the corresponding electric field intensity and magnetic. The measured current derivative waveform and the return stroke portion of the magnetic flux density derivative

Florida, University of

63

The development of a versatile field program for measuring tritium in real-time  

Science Conference Proceedings (OSTI)

Robust sample handling and liquid scintillation counting procedures have been developed to routinely monitor tritium in the field relative to the 20,000 pCi/L drinking water standard. This procedure allows tritium to be monitored hourly during 24 hour drilling operations at depths in the saturated zone potentially contaminated by sub-surface nuclear weapons testing at the Nevada Test Site. Using retrofitted shock hardened and vibration damped counters and strict analytical protocols, tritium may be measured rapidly in the field under hostile conditions. Concentration standards and ``dead`` tritium backgrounds are prepared weekly in a central laboratory and delivered to remote monitoring locations where they are recounted daily as a check on counter efficiency and calibration. Portable counters are located in trailers and powered off a battery pack and line filter fed by mobile generator. Samples are typically ground-waters mixed with drilling fluids returned after circulation through a drill string. Fluids are aerated and ``de-foamed,`` filtered, mixed with scintillation cocktail and subsequently dark-adapted before counting. Besides meeting regulatory requirements, ``real-time`` monitoring affords drilling and field personnel maximum protection against potential exposure to radionuclides; for routine operations, tritium activities may not exceed a 10,000 pCi/L threshold.

Rego, J.H.; Smith, D.K.

1994-04-01T23:59:59.000Z

64

Harmonics from SVC transformer saturation with direct current offset  

SciTech Connect

Circulation of direct current in transformer windings can cause significant transformer saturation and harmonic generation. This problem may be experienced by static var compensators with anti-parallel thyristor arrangement. This paper presents a technique to analyze the harmonic distortions caused by transformer saturation with direct current offset. The technique is used to investigate the harmonic generation from the transformer of a static var compensator to be installed in the B.C. Hydro system.

Xu, W.; Martinich, T.G.; Sawada, J.H.; Mansour, Y. (British Columbia Hydro, Burnaby, British Columbia (Canada))

1994-07-01T23:59:59.000Z

65

Environmental Measurement While Drilling System for Real-Time Field Screening of Contaminants  

Science Conference Proceedings (OSTI)

Sampling during environmental drilling is essential to fully characterize the spatial distribution and migration of subsurface contaminants. However, analysis of the samples is expensive and time-consuming: off-site laboratory analysis can take weeks or months. Real-time information on environmental conditions, drill bit location and temperature during drilling is valuable in many environmental restoration operations. This type of information can be used to provide field screening data and improved efficiency of site characterization activities. The Environmental Measurement-While-Drilling (EMWD) System represents an innovative blending of new and existing technology in order to obtain real-time data during drilling. The system consists of two subsystems. The down-hole subsystem (at the drill bit) consists of sensors, a power supply, a signal conditioning and transmitter board, and a radio-frequency (RF) coaxial cable. The up-hole subsystem consists of a battery pack/coil, pickup coil, receiver, and personal computer. The system is compatible with fluid miser drill pipe, a directional drilling technique that uses minimal drilling fluids and generates little to no secondary waste. In EMWD, downhole sensors are located behind the drill bit and linked by a high-speed data transmission system to a computer at the surface. Sandia-developed Windows{trademark}-based software is used for data display and storage. As drilling is conducted, data is collected on the nature and extent of contamination, enabling on-the-spot decisions regarding drilling and sampling strategies. Initially, the downhole sensor consisted of a simple gamma radiation detector, a Geiger-Mueller tube (GMT). The design includes data assurance techniques to increase safety by reducing the probability of giving a safe indication when an unsafe condition exists. The EMWD system has been improved by the integration of a Gamma Ray Spectrometer (GRS) in place of the GMT. The GRS consists of a sodium iodide-thallium activated crystal coupled to a photomultiplier tube (PMT). The output of the PMT goes to a multichannel analyzer (MCA).The MCA data is transmitted to the surface via a signal conditioning and transmitter board similar to that used with the GMT. The EMWD system is described and the results of the GRS field tests and field demonstration are presented.

Lockwood, G.J.; Normann, R.A.; Williams, C.V.

1999-02-22T23:59:59.000Z

66

Field Instruments for Real Time In-Situ Crude Oil Concentration Measurements  

E-Print Network (OSTI)

The Texas Water Resources Institute awarded a Mill Scholarship to M.C. Sterling, Jr in 2002. This project describes five sensors for rapid monitoring of crude oil concentrations in an aquatic system. These measurements are critical for monitoring plume transport. They are also useful for estimating polycyclic aromatic hydrocarbons (PAH) exposure concentrations as a component of toxicity risk assessments. A submersible multi-angle laser scattering instrument (LISST-100, Sequoia Instruments), an ex-situ single wavelength fluorometer (AU-10 field fluorometer, Turner Designs), an in-situ single wavelength fluorometer (Flashlamp, WET Labs), and two in-situ multiple wavelength fluorometers (ECO-FL3 and SAFire, WET Labs) are evaluated for sensitivity and bias. For each instrument, a brief discussion of its operating principles is presented. Crude oil emulsions of various concentrations were analyzed using the above instruments. The implications of potential interferences and instrument limits are discussed relative to their importance for real time monitoring of crude oil spills.

Fuller, C. B.; Bonner, J. S.; Page, C. A.; Arrambide, G.; Sterling Jr., M. C.; Ojo, T.

2003-06-01T23:59:59.000Z

67

Grazing incidence extreme ultraviolet spectrometer fielded with time resolution in a hostile Z-pinch environment  

Science Conference Proceedings (OSTI)

This recently developed diagnostic was designed to allow for time-gated spectroscopic study of the EUV radiation (4 nm power generator (1 MA, 100 ns risetime) at University of Nevada, Reno on a series of wire array z-pinch loads. Within this harsh z-pinch environment, radiation yields routinely exceed 20 kJ in the EUV and soft x-ray. There are also strong mechanical shocks, high velocity debris, sudden vacuum changes during operation, energic ion beams, and hard x-ray radiation in excess of 50 keV. The spectra obtained from the precursor plasma of an Al double planar wire array contained lines of Al IX and AlX ions indicating a temperature near 60 eV during precursor formation. Detailed results will be presented showing the fielding specifications and the techniques used to extract important plasma parameters using this spectrometer.

Williamson, K. M.; Kantsyrev, V. L.; Safronova, A. S.; Wilcox, P. G.; Cline, W.; Batie, S.; LeGalloudec, B.; Nalajala, V.; Astanovitsky, A. [Plasma Physics and Diagnostics Laboratory, Physics Department, University of Nevada, Reno, Nevada 89557 (United States)

2011-09-15T23:59:59.000Z

68

Design of near-field optical probes with optimal field enhancement by finite difference time domain electromagnetic simulation  

E-Print Network (OSTI)

March 2002 We report the three-dimensional electromagnetic simulation of gold nanoparticles FDTD simulations of gold particles illuminated by near infrared radiation are performed. Field regime was not possible until more recently. In 1984, Pohl et al. were able to image a test sample at 25

Xie, Xiaoliang Sunney

69

Improved braking torque generation capacity of an eddy current brake with time varying magnetic fields: A numerical study  

Science Conference Proceedings (OSTI)

Eddy current brakes (ECB) are electrically controlled and non-contact actuators used as assistive brakes in vehicles. ECBs exhibit insufficient generated braking torque at low speeds. In order to overcome this, the use of AC magnetic fields with fixed ... Keywords: Automotive applications, Brake-by-wire, Eddy current brakes, Finite element analysis, Time-varying magnetic field

Kerem Karakoc; Edward J. Park; Afzal Suleman

2012-10-01T23:59:59.000Z

70

Breakdown of time-dependent mean-field theory for a one-dimensional condensate of impenetrable bosons  

E-Print Network (OSTI)

We show that the time-dependent nonlinear Schrodinger equation of mean-field theory has limited utility for a one-dimensional condensate of impenetrable bosons. Mean-field theory with its associated order parameter predicts interference between split condensates that are recombined, whereas an exact many-body treatment shows minimal interference.

M. D. Girardeau; E. M. Wright

2000-02-25T23:59:59.000Z

71

Electron-Positron Pair Production in Space- or Time-Dependent Electric Fields  

E-Print Network (OSTI)

Treating the production of electron and positron pairs by a strong electric field from the vacuum as a quantum tunneling process we derive, in semiclassical approximation, a general expression for the pair production rate in a $z$-dependent electric field $E(z)$ pointing in the $z$-direction. We also allow for a smoothly varying magnetic field parallel to $E(z)$. The result is applied to a confined field $E(z)\

Kleinert, Hagen; Xue, She-Sheng

2008-01-01T23:59:59.000Z

72

Electron-Positron Pair Production in Space- or Time-Dependent Electric Fields  

E-Print Network (OSTI)

Treating the production of electron and positron pairs by a strong electric field from the vacuum as a quantum tunneling process we derive, in semiclassical approximation, a general expression for the pair production rate in a $z$-dependent electric field $E(z)$ pointing in the $z$-direction. We also allow for a smoothly varying magnetic field parallel to $E(z)$. The result is applied to a confined field $E(z)\

Hagen Kleinert; Remo Ruffini; She-Sheng Xue

2008-07-06T23:59:59.000Z

73

LATERAL OFFSET OF THE CORONAL MASS EJECTIONS FROM THE X-FLARE OF 2006 DECEMBER 13 AND ITS TWO PRECURSOR ERUPTIONS  

Science Conference Proceedings (OSTI)

Two GOES sub-C-class precursor eruptions occurred within {approx}10 hr prior to and from the same active region as the 2006 December 13 X4.3-class flare. Each eruption generated a coronal mass ejection (CME) with center laterally far offset ({approx}> 45 Degree-Sign ) from the co-produced bright flare. Explaining such CME-to-flare lateral offsets in terms of the standard model for solar eruptions has been controversial. Using Hinode/X-Ray Telescope (XRT) and EUV Imaging Spectrometer (EIS) data, and Solar and Heliospheric Observatory (SOHO)/Large Angle and Spectrometric Coronagraph (LASCO) and Michelson Doppler Imager (MDI) data, we find or infer the following. (1) The first precursor was a 'magnetic-arch-blowout' event, where an initial standard-model eruption of the active region's core field blew out a lobe on one side of the active region's field. (2) The second precursor began similarly, but the core-field eruption stalled in the side-lobe field, with the side-lobe field erupting {approx}1 hr later to make the CME either by finally being blown out or by destabilizing and undergoing a standard-model eruption. (3) The third eruption, the X-flare event, blew out side lobes on both sides of the active region and clearly displayed characteristics of the standard model. (4) The two precursors were offset due in part to the CME originating from a side-lobe coronal arcade that was offset from the active region's core. The main eruption (and to some extent probably the precursor eruptions) was offset primarily because it pushed against the field of the large sunspot as it escaped outward. (5) All three CMEs were plausibly produced by a suitable version of the standard model.

Sterling, Alphonse C.; Moore, Ronald L. [Space Science Office, VP62, NASA Marshall Space Flight Center, Huntsville, AL 35812 (United States); Harra, Louise K., E-mail: alphonse.sterling@nasa.gov, E-mail: ron.moore@nasa.gov, E-mail: lkh@mssl.ucl.ac.uk [UCL-Mullard Space Science Laboratory, Holmbury St Mary, Dorking, Surrey RH5 6NT (United Kingdom)

2011-12-10T23:59:59.000Z

74

Decontaminate Effect of Paddy Field on Waste Water from Fish Pond under Different Residence Time  

Science Conference Proceedings (OSTI)

Wastewater from aquiculture contains usefu1 nutrients for plant, such as nitrogen and phosphorus. Drainage of the wastewater resulted in eutrophication of water body. The nutrients in wastewater from fish pond was assimilated and utilized by paddy field. ... Keywords: Decontaminate effect, Fishpond, Paddy field, Water cycle, Water quality

Shun-Yao Jiang, Jian-Qiang Zhu, Gu Li, Qi-Xia Wu, Yuan Zhou

2013-01-01T23:59:59.000Z

75

Time response of the high-field electron distribution function in GaAs  

Science Conference Proceedings (OSTI)

Numerical calculations have been made of the high-field electron distribution function for GaAs, its small-signal frequency response and its behavior in large sinusoidal electric fields-The response speed is limited by the low scattering rate within ...

H. D. Rees

1969-09-01T23:59:59.000Z

76

Car-Parrinello Molecular Dynamics With A Sinusoidal Time-Dependent Potential Field  

E-Print Network (OSTI)

A sinusoidal external field is applied in Car-Parrinello molecular dynamics simulations. We present an implementation and discuss first test applications to electron and ion transfers in complex molecular systems.

Alznauer, Tobias

2012-01-01T23:59:59.000Z

77

ANTHEM simulation of the early time magnetic field penetration of the plasma surrounding a high density Z-pinch  

SciTech Connect

The early time penetration of magnetic field into the low density coronal plasma of a Z-pinch fiber is studied with the implicit plasma simulation code ANTHEM. Calculations show the emission of electrons from the cathode, pinching of the electron flow, magnetic insulation of the electrons near the anode, and low density ion blow off. PIC-particle ion calculations show a late time clumping of the ion density not seen with a fluid ion treatment. 4 refs., 4 figs.

Mason, R.J.

1989-01-01T23:59:59.000Z

78

Case Studies of Greenhouse Gas Emissions Offset Projects Implemented in the United Nations Clean Development Mechanism  

Science Conference Proceedings (OSTI)

This paper describes case studies of greenhouse gas (GHG) emissions offset project activities undertaken within the United Nations Clean Development Mechanism (CDM) program. This paper is designed to communicate key lessons learned from the implementation of different types of GHG emissions offsets projects in the CDM to policy makers in the U.S. who may be interested in developing national, regional or state-based GHG offsets programs. This paper also is designed to provide important insights to entitie...

2011-12-21T23:59:59.000Z

79

CMOS Open Defect Detection Based on Supply Current in Time-Variable Electric Field and Supply Voltage Application  

Science Conference Proceedings (OSTI)

In this paper, a new test method is proposed for detecting open defects in CMOS ICs. The method is based on supply current of ICs generated by applying time-variable supply voltage and electric field from the outside of the ICs. The feasibility of the ...

Masaki Hashizume; Masahiro Ichimiya; Hiroyuki Yotsuyanagi; Takeomi Tamesada

2001-11-01T23:59:59.000Z

80

Initial time singularities and admissible initial states for a system of coupled scalar fields  

Science Conference Proceedings (OSTI)

We discuss the problem of initial states for a system of coupled scalar fields out of equilibrium in the one-loop approximation. The fields consist of classical background fields, taken constant in space, and quantum fluctuations. If the initial state is the adiabatic vacuum, i.e., the ground state of a Fock space of particle excitations that diagonalize the mass matrix, the energy-momentum tensor is infinite at t=0, its most singular part behaves as 1/t. When the system is coupled to gravity this presents a problem that we solve by a Bogoliubov transformation of the naive initial state. As a side result we also discuss the canonical formalism and the adiabatic particle number for such a system. Most of the formalism is presented for Minkowksi space. Embedding the system and its dynamics into a flat Friedmann-Robertson-Walker universe is straightforward and we briefly address the essential modifications.

Baacke, Juergen; Kevlishvili, Nina [Fakultaet Physik, Technische Universitaet Dortmund D-44221 Dortmund (Germany); Deutsches Elektronen Synchrotron DESY D-22603 Hamburg (Germany); Andronikashvili Institute of Physics, GAS 0177 Tbilisi (Georgia)

2010-01-15T23:59:59.000Z

Note: This page contains sample records for the topic "field time offset" 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

Fermion production by a dependent of time electric field in de Sitter universe  

E-Print Network (OSTI)

Fermion production by the electric field of a charge on de Sitter expanding universe is analyzed. The amplitude and probability of pair production are computed. We obtain from our calculations that the modulus of the momentum is no longer conserved and that there are probabilities for production processes where the helicity is no longer conserved. The rate of pair production in an electric field is found to be important in the early universe when the expansion factor was large comparatively with the particle mass.

Cosmin Crucean

2013-02-06T23:59:59.000Z

82

Iterative receivers for OFDM systems with dispersive fading and frequency offset  

E-Print Network (OSTI)

The presence of dispersive fading and inter-carrier interference (ICI) constitute the major impediment to reliable communications in orthogonal frequency-division multiplexing (OFDM) systems. Recently iterative (``Turbo'') processing techniques, which have been successfully applied to many detection/decoding problems, have received considerable attention. In this thesis, we first aim on the design of iterative receiver for single antenna OFDM system with frequency offset and dispersive fading. Further work is then extended to space-time block coded (STBC) OFDM system. At last, the technique is applied to STBC-OFDM system through a newly built channel model, which is based on a physical description of the propagation environment. The performance of such systems are verified by computer simulations. The simulation results show that the iterative techniques work well in OFDM systems.

Liu, Hui

2005-05-01T23:59:59.000Z

83

Space and Time Variations in Turbulence during the Manhattan Midtown 2005 Field Experiment  

Science Conference Proceedings (OSTI)

The Manhattan Midtown-2005 field experiment (MID05) collected turbulence observations at 12 street-level sites (at 3-m height) and at 5 rooftop sites (at 220-m average height). The MID05 observations of 30-min averaged standard deviations of wind ...

S. R. Hanna; Y. Zhou

2009-11-01T23:59:59.000Z

84

Characterization of high-power RF structures using time-domain field codes  

Science Conference Proceedings (OSTI)

We have modeled gyrotron windows and gyrotron amplifier sever structures for TE modes in the 100--150 GHz range and have computed the reflection and transmission characteristics from the field data. Good agreement with frequency domain codes and analytic analysis have been obtained for some simple geometries. We present results for realistic structures with lossy coatings and describe implementation of microwave diagnostics.

Shang, C.C.; DeFord, J.F.; Swatloski, T.L.

1992-08-21T23:59:59.000Z

85

An adaptive framework for visualizing unstructured grids with time-varying scalar fields  

Science Conference Proceedings (OSTI)

Interactive visualization of time-varying volume data is essential for many scientific simulations. This is a challenging problem since this data is often large, can be organized in different formats (regular or irregular grids), with variable instances ... Keywords: Time-varying data, Unstructured grids, Volume rendering

Fábio F. Bernardon; Steven P. Callahan; João L. D. Comba; Cláudio T. Silva

2007-06-01T23:59:59.000Z

86

Developing Greenhouse Gas Emissions Offsets by Reducing Nitrous Oxide (N2O) Emissions in Agricultural Crop Production: Experience Validating a New GHG Offset Protocol  

Science Conference Proceedings (OSTI)

This project report describes in part the second phase (years four through six, 2010–2012) of a two-phase, six-year long EPRI-sponsored research project entitled “Developing Greenhouse Gas Emissions Offsets by Reducing Nitrous Oxide (N2O) Emissions.” This project investigated an innovative approach to developing large-scale, cost-effective greenhouse gas (GHG) emissions offsets that potentially can be implemented across broad geographic areas of the ...

2013-05-28T23:59:59.000Z

87

TIME-RESOLVED ANALYSES OF MICROSTRUCTURE IN ADVANCED MATERIALS UNDER MAGNETIC FIELDS AT ELEVATED TEMPERATURES USING NEUTRONS  

Science Conference Proceedings (OSTI)

Fundamental science breakthroughs are being facilitated by high magnetic field studies in a broad spectrum of research disciplines. Furthermore, processing of materials under high magnetic fields is a novel technique with very high science and technological potential. However, currently the capability does not exist to do in-situ time-resolved quantitative analyses at high magnetic field strengths and elevated temperatures. Therefore, most measurements are performed ex situ and do not capture the microstructural evolution of the samples during high field exposure. To address this deficiency, we are developing high field magnet processing and analyses systems at the High Flux Isotope Reactor and the Spallation Neutron Source at the Oak Ridge National Laboratory which will link the analytical capabilities inherent in neutron science to the needs of magnetic processing research. Our goal is to apply advanced neutron scattering techniques to explore time-resolved characterizations of magnetically driven alloy phase transformations under transient conditions. This paper will provide an overview of the current status of this research endeavor with preliminary results obtained on ferrous alloys.

Ludtka, Gerard Michael [ORNL; Klose, Frank Richard [ORNL; Kisner, Roger A [ORNL; Fernandez-Baca, Jaime A [ORNL; Ludtka, Gail Mackiewicz- [ORNL; Wilgen, John B [ORNL; Jaramillo, Roger A [ORNL; Santodonato, Louis J [ORNL; Wang, Xun-Li [ORNL; Hubbard, Camden R [ORNL; Tang, Fei [ORNL

2007-01-01T23:59:59.000Z

88

Environmental Measurement-While-Drilling System for Real-Time Field Screening of Contaminants  

SciTech Connect

Sampling during environmental drilling is essential to fully characterize the spatial distribution and migration of near surface contaminants. However, analysis of the samples is expensive and time-consuming: off-site laboratory analysis can take weeks or months. An alternative screening technology, Environmental Measurement-While-Drilling (EMWD), could save money and valuable time by quickly distinguishing between contaminated and uncontaminated areas. Real time measurements provided by an EMWD system enable on-the-spot decisions to be made regarding sampling strategies. The system also enhances worker safety and provides the added flexibility of being able to steer a drill bit in or out of hazardous zones.

Bishop, L.B.; Lockwood, G.J.; Normann, R.A.; Selph, M.M.; Williams, C.V.

1999-02-22T23:59:59.000Z

89

Time-dependent restricted-active-space self-consistent field theory for laser-driven many-electron dynamics  

E-Print Network (OSTI)

We present the time-dependent restricted-active-space self-consistent field (TD-RASSCF) theory as a new framework for the time-dependent many-electron problem. The theory generalizes the multiconfigurational time-dependent Hartree-Fock (MCTDHF) theory by incorporating the restricted-active-space scheme well known in time-independent quantum chemistry. Optimization of the orbitals as well as the expansion coefficients at each time step makes it possible to construct the wave function accurately while using only a relatively small number of electronic configurations. In numerical calculations of high-order harmonic generation spectra of a one-dimensional model of atomic beryllium interacting with a strong laser pulse, the TD-RASSCF method is reasonably accurate while largely reducing the computational complexity. The TD-RASSCF method has the potential to treat large atoms and molecules beyond the capability of the MCTDHF method.

Miyagi, Haruhide

2013-01-01T23:59:59.000Z

90

Valuation of carbon capture and sequestration under Greenhouse gas regulations: CCS as an offsetting activity  

SciTech Connect

When carbon capture and sequestration is conducted by entities that are not regulated, it could be counted as an offset that is fungible in the market or sold to a voluntary market. This paper addresses the complications that arise in accounting for carbon capture and sequestration as an offset, and methodologies that exist for accounting for CCS in voluntary and compliance markets. (author)

Lokey, Elizabeth

2009-08-15T23:59:59.000Z

91

A low-offset high-speed double-tail dual-rail dynamic latched comparator  

Science Conference Proceedings (OSTI)

This paper presents a new dynamic latched comparator which shows lower input-referred latch offset voltage and higher load drivability than the conventional dynamic latched comparators. With two additional inverters inserted between the input- and output-stage ... Keywords: clocked comparator, dynamic latched comparator, low-offset low-power high-speed, voltage sense amplifier (sa)

HeungJun Jeon; Yong-Bin Kim

2010-05-01T23:59:59.000Z

92

Real-time vector field tracking with a cold-atom magnetometer  

E-Print Network (OSTI)

We demonstrate a fast three-axis optical magnetometer using cold, optically-trapped $^{87}$Rb gas as a sensor. By near-resonant Faraday rotation we record the free-induction decay following optical pumping along two orthogonal axes to obtain the three field components and one gradient component. A single measurement achieves shot-noise limited sub-nT sensitivity in 1 ms, with transverse spatial resolution of $\\sim$ 20 $\\mu$m. We make a detailed analysis of the shot-noise-limited sensitivity.

Naeimeh Behbood; Ferran Martin Ciurana; Giorgio Colangelo; Mario Napolitano; Morgan W. Mitchell; Robert J. Sewell

2013-03-10T23:59:59.000Z

93

The influence of bowl offset on air motion in a direct injection diesel engine  

SciTech Connect

The influence of bowl offset on motored mean flow and turbulence in a direct injection diesel engine has been examined with the aid of a multi-dimensional flow code. Results are presented for three piston geometries. The bowl geometry of each piston was the same, while the offset between the bowl and the cylinder axis was varied from 0.0 to 9.6% of the bore. The swirl ratio at intake valve closing was also varied from 2.60 to 4.27. It was found that the angular momentum of the air at TDC was decreased by less than 8% when the bowl was offset. Nevertheless, the mean (squish and swirl) flows were strongly affected by the offset. In addition, the distribution of turbulent kinetic energy (predicted by the /delta/-e model) was modified. Moderate increases (10% or less) in mass averaged turbulence intensity at TDC with offset were observed.

McKinley, T.L.; Primus, R.J

1988-01-01T23:59:59.000Z

94

Systematic study of low-lying E1 strength using the time-dependent mean field theory  

Science Conference Proceedings (OSTI)

We carry out systematic investigation of electric dipole (E1) mode from light to heavy nuclei, using a new time-dependent mean field theory: the Canonical-basis Time-Dependent Hartree-Fock-Bogoliubov (Cb-TDHFB) theory. The Cb-TDHFB in the three-dimensional coordinate space representation can deal with pairing correlation and any kind of deformation in the timedependent framework. We report the neutron-number dependence of the low-energy E1 mode for light (A > 40) and heavy isotopes (A < 100) around N= 82.

Ebata, S.; Nakatsukasa, T.; Inakura, T. [Center for Nuclear Study, Univ. of Tokyo, Bunkyo-ku, 113-0033, Japan and Theoretical Nuclear Physics Laboratory, RIKEN Nishina Center, Wako-shi, 351-0198 (Japan); Theoretical Nuclear Physics Laboratory, RIKEN Nishina Center, Wako-shi, 351-0198 (Japan) and Center for Computational Sciences, Univ. of Tsukuba, Tsukuba-shi, 305-8571 (Japan); Theoretical Nuclear Physics Laboratory, RIKEN Nishina Center, Wako-shi, 351-0198 (Japan)

2012-11-12T23:59:59.000Z

95

Time-specific measurements of energy deposition from radiation fields in simulated sub-micron tissue volumes  

Science Conference Proceedings (OSTI)

A tissue-equivalent spherical proportional counter is used with a modified amplifier system to measure specific energy deposited from a uniform radiation field for short periods of time ({approximately}1 {micro}s to seconds) in order to extrapolate to dose in sub-micron tissue volumes. The energy deposited during these time intervals is compared to biological repair processes occurring within the same intervals after the initial energy deposition. The signal is integrated over a variable collection time which is adjusted with a square-wave pulse. Charge from particle passages is collected on the anode during the period in which the integrator is triggered, and the signal decays quickly to zero after the integrator feedback switch resets; the process repeats for every triggering pulse. Measurements of energy deposited from x rays, {sup 137}Cs gamma rays, and electrons from a {sup 90}Sr/{sup 90}Y source for various time intervals are taken. Spectral characteristics as a function of charge collection time are observed and frequency plots of specific energy and collection time-interval are presented. In addition, a threshold energy flux is selected for each radiation type at which the formation of radicals (based on current measurements) in mammalian cells equals the rate at which radicals are repaired.

Famiano, M.A.

1997-07-07T23:59:59.000Z

96

Carbon offsets as a cost containment instrument : a case study of reducing emissions from deforestation and forest degradation  

E-Print Network (OSTI)

Carbon offset is one type of flexibility mechanism in greenhouse gas emission trading schemes that helps nations meet their emission commitments at lower costs. Carbon offsets take advantage of lower abatement cost ...

Kim, Jieun, S.M. Massachusetts Institute of Technology

2010-01-01T23:59:59.000Z

97

Self-Similar Nonlinear Dynamical Solutions for One-Component Nonneutral Plasma in a Time-Dependent Linear Focusing Field  

Science Conference Proceedings (OSTI)

In a linear trap confining a one-component nonneutral plasma, the external focusing force is a linear function of the configuration coordinates and/or the velocity coordinates. Linear traps include the classical Paul trap and the Penning trap, as well as the newly proposed rotating-radio- frequency traps and the Mobius accelerator. This paper describes a class of self-similar nonlinear solutions of nonneutral plasma in general time-dependent linear focusing devices, with self-consistent electrostatic field. This class of nonlinear solutions includes many known solutions as special cases.

Hong Qin and Ronald C. Davidson

2011-07-19T23:59:59.000Z

98

Small Town Using Wind Power to Offset Electricity Costs | Department of  

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

Town Using Wind Power to Offset Electricity Costs Town Using Wind Power to Offset Electricity Costs Small Town Using Wind Power to Offset Electricity Costs September 8, 2010 - 10:00am Addthis Kevin Craft Carmen, Oklahoma, is not your average small town. It was the first recipient of an Energy Efficiency and Conservation block grant - and the small town of 412 is using that Recovery Act funding to cut costs through wind energy. Through a $242,500 Recovery Act grant, town officials purchased four 5 kW and one 10 kW wind turbines. Officials are using wind energy to offset electricity costs for all town-owned buildings and save an estimated $24,000 a year. According to Therese Kephart, Carmen's town clerk and treasurer, the goal of the project is to produce enough electricity to run all town-owned buildings.

99

Aggregation of Greenhouse Gas Emissions Offsets: Benefits, Existing Methods, and Key Challenges  

Science Conference Proceedings (OSTI)

This report is designed to develop and disseminate to members of the Electric Power Research Institute (EPRI), the public at large, and participants in the world's evolving carbon markets a set of lessons learned about the aggregation of individual greenhouse gas (GHG) emissions offset projects into larger, organized configurations that can yield large-scale GHG emissions offsets. Aggregation puts together geographically and/or temporally dispersed activities that reduce emissions in a similar manner to ...

2011-10-31T23:59:59.000Z

100

A Comprehensive Overview of Project-Based Mechanisms to Offset Greenhouse Gas Emissions  

Science Conference Proceedings (OSTI)

This EPRI Technical Update provides senior managers and environmental staff of U.S. electric companies with a comprehensive understanding of the role that greenhouse gas (GHG) emissions offsets can play in their own company's future carbon emissions compliance strategy and how offsets offer a key contribution to meet global GHG emissions reduction targets faster and at comparatively low cost. So-called project-based mechanisms use the power of markets to supply cost-efficient GHG emission reductions to e...

2007-12-21T23:59:59.000Z

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


101

Detecting internal corrosion of natural gas transmission pipelines: field tests of probes and systems for real-time corrosion measurement  

Science Conference Proceedings (OSTI)

A field study was conducted to evaluate the use of automated, multi-technique electrochemical corrosion-rate monitoring devices and probes for detecting corrosion in environments similar to those found in natural gas transmission pipelines. It involved measurement of real-time corrosion signals from operating pipelines. Results and interpretation were reported from four different field test locations. Standard flush-mount and custom flange probes were used in four different environments at a gas-gathering site and one environment but two different probe orientations at a natural gas site. These sites were selected to represent normal and upset conditions common in gas transmission pipelines. The environments consisted of two different levels of humidified natural gas, liquid hydrocarbon, and water from natural gas. Probe locations included the 6 and 12 o?clock positions of a natural gas pipeline carrying 2-phase gas/liquid flow. The probe data was monitored using completely remote solar powered systems that provided real-time data transmission via wireless back to a pipeline control station. Data are also presented comparing the ECR probe data to that for coupons used to determine corrosion rate and to detect the presence of microbiologically influenced corrosion (MIC).

Covino, Bernard S., Jr.; Bullard, Sophie J.; Cramer, Stephen D.; Holcomb, Gordon R.; Ziomek-Moroz, M.; Kane, R.D. (InterCorr International); Meidinger, B. (Rocky Mountain Oilfield Testing Center)

2005-01-01T23:59:59.000Z

102

Geometric Offsets Across Spiral Arms in M51: Nature of Gas and Star Formation Tracers  

E-Print Network (OSTI)

We report measurements of geometric offsets between gas spiral arms and associated star forming regions in the grand-design spiral galaxy M51. These offsets are a suggested measure of the star formation timescale after the compression of gas at spiral arm entry. A surprising discrepancy, by an order of magnitude, has been reported in recent offset measurements in nearby spiral galaxies. Measurements using CO and H-alpha emission find large and ordered offsets in M51. On the contrary, small or non-ordered offsets have been found using the HI 21cm and 24 micron emissions, possible evidence against gas flow through spiral arms, and thus against the conventional density-wave theory with a stationary spiral pattern. The goal of this paper is to understand the cause of this discrepancy. We investigate potential causes by repeating those previous measurements using equivalent data, methods, and parameters. We find offsets consistent with the previous measurements and conclude that the difference of gas tracers, i.e....

Louie, M; Egusa, F

2013-01-01T23:59:59.000Z

103

Semiclassical pair production rate for time-dependent electrical fields with more than one component: -WKB-approach and world-line instantons  

E-Print Network (OSTI)

We present an analytic calculation of the semiclassical electron-positron pair creation rate by time-dependent electrical fields. We use two methods, first the imaginary time method in the WKB-approximation and second the world-line instanton approach. Both methods are generalized to time-dependent electric fields with more than one component. The two methods give the same result if the momentum spectrum of the produced pairs is peaked around $\\vec{p}=0$. The result in the world-line instanton approach can be obtained from the WKB result by a Taylor expansion around this peak. For the examples usually discussed in the literature the field has one component and the momentum spectrum is peaked at $\\vec{p}=0$ so that the two methods agree. By studying the case of rotating electric fields we however show that for fields with more components this is generally not true.

Eckhard Strobel; She-Sheng Xue

2013-12-11T23:59:59.000Z

104

We study the interaction of a high frequency AC current with a magnetic field in an YBCO thin film by using time  

E-Print Network (OSTI)

an applied magnetic field, and a time varying transport current that does not induce any flux inside the thinWe study the interaction of a high frequency AC current with a magnetic field in an YBCO thin film of flux distributions. We find that the total current distribution can be described as the superposition

Lewis, Robert Michael

105

CO2 Offset Options: Comparative Assessment of Terrestial Sinks vs. Natural Gas Combined Cycle  

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

W. South (south@energyresources.com; 202-785-8833) W. South (south@energyresources.com; 202-785-8833) Energy Resources International, Inc. 1015 18 th Street, N.W., Suite 650 Washington, DC 20036 CO 2 Offset Options: Comparative Assessment of Terrestial Sinks vs. Natural Gas Combined Cycle 1 Abstract This study compares the economic value of two CO 2 mitigation actions: terrestrial reforestation to sequester CO 2 emitted from coal-fired power generation versus natural gas combined cycle (NGCC) power generation to avoid (minimize) CO 2 release. The same quantity of carbon offset was assumed for both actions. Tree stock growth, carbon absorption/release cycles, and replanting were considered to maintain the quantity of carbon offset via reforestation. The study identified important parameters with both CO 2 mitigation options that should be considered when examining alternative strategies.

106

Suburbs offset Low Carbon Footprint of major U.S. Cities | OpenEI Community  

Open Energy Info (EERE)

Suburbs offset Low Carbon Footprint of major U.S. Cities Suburbs offset Low Carbon Footprint of major U.S. Cities Home > Blogs > Graham7781's blog Graham7781's picture Submitted by Graham7781(2002) Super contributor 9 January, 2014 - 13:12 carbon cities CO2 emissions OpenEI suburbs US New research from the University of California-Berkeley shows that those who live in cities in the United States have significantly smaller per-capita carbon footprints than their suburban counterparts. The difference is such that suburban dwellers essentially offset the low carbon footprints of urban dwellers. Vehicle emissions accounted for the biggest contributor to carbon dioxide, accounted by longer commutes to work, school, and shopping. The data, balancing 37 factors such as weather, income, home size, shows that those dwelling in major cities have a carbon footprint about 50 percent below the

107

A Field-Deployable Real-Time Laser-Based Non-Intrusive Detection System for Measurement of True Travel Time on the Highway  

E-Print Network (OSTI)

A Real- Time Laser-Based Detection System for Measurement ofTime Laser- Based Prototype Detection System for MeasurementLaser-Based Non-Intrusive Detection System for Measurement

Cheng, Harry H.; Shaw, Ben; Palen, Joe; Wang, Zhaoqing; Chen, Bo

2002-01-01T23:59:59.000Z

108

Extracting Unique Information from High-Resolution Forecast Models: Monitoring Selected Fields and Phenomena Every Time Step  

Science Conference Proceedings (OSTI)

A new strategy for generating and presenting model diagnostic fields from convection-allowing forecast models is introduced. The fields are produced by computing temporal-maximum values for selected diagnostics at each horizontal grid point ...

John S. Kain; Scott R. Dembek; Steven J. Weiss; Jonathan L. Case; Jason J. Levit; Ryan A. Sobash

2010-10-01T23:59:59.000Z

109

Temperature dependent band offsets in PbSe/PbEuSe quantum well heterostructures  

Science Conference Proceedings (OSTI)

The band offsets of PbSe/Pb{sub 1-x}Eu{sub x}Se multi-quantum wells grown by molecular beam epitaxy are determined as a function of temperature and europium content using temperature-modulated differential transmission spectroscopy. The confined quantum well states in the valence and conduction bands are analyzed using a k{center_dot}p model with envelope function approximation. From the fit of the experimental data, the normalized conduction band offset is determined as 0.45{+-}0.15 of the band gap difference, independently of Eu content up to 14% and temperature from 20 to 300 K.

Simma, M.; Bauer, G.; Springholz, G. [Institut fuer Halbleiter und Festkoerperphysik, Johannes Kepler Universitaet, A-4040 Linz (Austria)

2012-10-22T23:59:59.000Z

110

Developing Greenhouse Gas Emissions Offsets by Reducing Nitrous Oxide (N2O) Emissions in Agricultural Crop Production  

Science Conference Proceedings (OSTI)

This report covers the first two years of a three-year long project entitled "Developing Greenhouse Gas Emissions Offsets by Reducing Nitrous Oxide (N2O) Emissions." This EPRI-sponsored project is investigating an innovative approach to developing large-scale and potentially cost-effective greenhouse gas (GHG) emissions offsets that could be implemented across broad geographic areas of the U.S. and internationally. The tools and information developed in this project will broaden the GHG emissions offset ...

2008-11-11T23:59:59.000Z

111

Production gains won't offset dips elsewhere  

Science Conference Proceedings (OSTI)

It's not the best of times currently for the Organization of Petroleum Exporting Countries (OPEC). The cartel is struggling to maintain its benchmark price of $29/bbl for crude, primarily through a disparate set of production cutbacks among its member nations. Though it's too early to tell if their effort has succeeded, the members are putting up a front and vowing to hang tough. OPEC still has the bulk of the world's hydrocarbon reserves, with the bonus of being able to produce those reserves more cheaply than competing producers in most cases. World supply and demand should be more closely in balance by the end of the decade, allowing OPEC to regain much of its price leverage.

LeBlanc, L.; Redden, J.; Cornitius, T.; Tanner, R.

1984-12-01T23:59:59.000Z

112

A hybrid approach to outlier detection in the offset lithographic printing process  

Science Conference Proceedings (OSTI)

Artificial neural networks are used to model the offset printing process aiming to develop tools for on-line ink feed control. Inherent in the modelling data are outliers owing to sensor faults, measurement errors and impurity of materials used. It is ... Keywords: Fuzzy expert, Leverages, Neural network, Outlier detection

C. Englund; A. Verikas

2005-09-01T23:59:59.000Z

113

Blade Offset and Pitch Effects on a High Solidity Vertical Axis Wind Turbine  

E-Print Network (OSTI)

ABSTRACT A high solidity, small scale, 2.5m diameter by 3m high Vertical Axis Wind Turbine (VAWT, performance 1. INTRODUCTION Small scale vertical axis wind turbines (VAWTs) show potential for urban rooftop turbines. Keywords: Vertical Axis Wind Turbine, VAWT, airfoil, pitch, blade, mount, offset, high solidity

Tullis, Stephen

114

Unified Theory of Bivacuum, Particles Duality, Fields & Time. New Bivacuum Mediated Interaction, Overunity Devices, Cold Fusion & Nucleosynthesis  

E-Print Network (OSTI)

New concept of Bivacuum is introduced, as a dynamic matrix of the Universe, composed from sub-quantum particles and antiparticles, forming vortical structures. These structures are presented by continuum of dipoles, each dipole containing a pair of correlated torus and antitorus: V(+) and V(-) of the opposite energy/mass, spin, charge and magnetic moments, compensating each other. The rest mass and charge of sub-elementary fermions or antifermions is a result of Bivacuum dipoles opposite symmetry shifts. Their fusion to triplets follows by elementary particles and antiparticles origination. The [corpuscle (C) - wave (W)] duality is a result of correlated beats between the 'actual' and 'complementary' states of sub-elementary fermions of triplets. It is shown, that Principle of least action, the 2d and 3d laws of thermodynamics can be a consequences of forced combinational resonance between positive and negative virtual pressure waves (VPW+/-) of Bivacuum and [C-W] pulsation of elementary particles. The quantum entanglement, mediated by virtual microtubules, composed from Bivacuum dipoles, connecting remote particles, is a result of such Bivacuum-matter interaction. The pace of time for any closed system is determined by pace of kinetic energy change of this system. The proposed mechanism of overunity devices can be provided by the electrons acceleration, induced by their resonant interaction with high frequency positive and negative VPW+/- in pull-in range conditions. The latter can be excited by pulsing currents and fields. The mechanism of overheating and cold fusion in electrolytic cells without violation of energy conservation is proposed also.

Alex Kaivarainen

2002-07-06T23:59:59.000Z

115

Development and Testing of Field-Deployable Real-Time Laser-Based Non-Intrusive Detection System for Measurement of True Travel Time on the Highway  

E-Print Network (OSTI)

Laser-Based Non-Intrusive Detection System for MeasurementLaser-Based Non-Intrusive Detection System for Measurementsystems are entirely dependent on time-of-?ight laser measurements

2001-01-01T23:59:59.000Z

116

Comment on 'Geometric phase of the gyromotion for charged particles in a time-dependent magnetic field'[Phys. Plasmas 18, 072505 (2011)  

Science Conference Proceedings (OSTI)

The geometric analysis of the gyromotion for charged particles in a time-dependent magnetic field by Liu and Qin [Phys. Plasmas 18, 072505 (2011)] is reformulated in terms of the spatial angles that represent the instantaneous orientation of the magnetic field. This new formulation, which includes the equation of motion for the pitch angle, clarifies the decomposition of the gyroangle-averaged equation of motion for the gyrophase into its dynamic and geometric contributions.

Brizard, Alain J. [Department of Physics, Saint Michael's College, Colchester, Vermont 05439 (United States); Guillebon, Loiec de [Centre de Physique Theorique Aix-Marseille Universite, CNRS (UMR 7332), 13288 Marseille Cedex 09 (France)

2012-09-15T23:59:59.000Z

117

Developing Greenhouse Gas Emissions Offsets by Reducing Nitrous Oxide (N2O) Emissions in Agricultural Crop Production  

Science Conference Proceedings (OSTI)

This final project report describes a three-year long EPRI supplemental project entitled "Developing Greenhouse Gas Emissions Offsets by Reducing Nitrous Oxide (N2O) Emissions." This EPRI-sponsored project investigated an innovative approach to developing large-scale, cost-effective greenhouse gas (GHG) emissions offsets that potentially can be implemented across broad geographic areas of the United States and internationally.

2009-12-17T23:59:59.000Z

118

Long-time solution of the time-dependent Schroedinger equation for an atom in an electromagnetic field using complex coordinate contours  

SciTech Connect

We demonstrate that exterior complex scaling (ECS) can be used to impose outgoing wave boundary conditions exactly on solutions of the time-dependent Schrodinger equation for atoms in intense electromagnetic pulses using finite grid methods. The procedure is formally exact when applied in the appropriate gauge and is demonstrated in a calculation of high harmonic generation in which multiphoton resonances are seen for long pulse durations. However, we also demonstrate that while the application of ECS in this way is formally exact, numerical error can appear for long time propagations that can only be controlled by extending the finite grid. A mathematical analysis of the origins of that numerical error, illustrated with an analytically solvable model, is also given.

Tao, Liang; Vanroose, Wim; Reps, Brian; Rescigno, Thomas N.; McCurdy, C. William

2009-09-08T23:59:59.000Z

119

Using Measurements of Fill Factor at High Irradiance to Deduce Heterobarrier Band Offsets: Preprint  

DOE Green Energy (OSTI)

Using a 2D device simulation tool, we examine the high irradiance behavior of a single junction, GaAs concentrator cell as a function of the doping in the back surface confinement layer. The confinement layer is designed to be a barrier for both holes and electrons in the base of the solar cell. For a p-type base we show that the FF of the cell at high concentrations is a strong function of both the magnitude of the valence band offset and the doping level in the barrier. In short, for a given valence band offset (VBO), there is a critical barrier doping, below which the FF drops rapidly with lower doping. This behavior is confirmed experimentally for a GaInP/GaAs double heterostructure solar cell where the critical doping concentration (at 500 suns) in the back surface confinement layer is ~1e18 cm-3 for a VBO of 300 meV.

Olson, J. M.; Steiner, M. A.; Kanevce, A.

2011-07-01T23:59:59.000Z

120

Experimental Verification of the Root Cause Mechanism for Axial Offset Anomaly  

Science Conference Proceedings (OSTI)

Researchers at the Georgia Institute of Technology built a test facility designed to experimentally verify the root cause mechanism for axial offset anomaly (AOA) in pressurized water reactors (PWRs). Tests consisted of depositing materials from the simulated PWR coolant on zircaloy-4 test elements, followed by rapid isolation from the boron-rich coolant to trap within the deposit layer any boron compounds having retrograde solubility. Although significant amounts of boron (up to 8 weight percent) were i...

2002-12-03T23:59:59.000Z

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


121

Sensory information in local field potentials and spikes from visual and auditory cortices: time scales and frequency bands  

Science Conference Proceedings (OSTI)

Studies analyzing sensory cortical processing or trying to decode brain activity often rely on a combination of different electrophysiological signals, such as local field potentials (LFPs) and spiking activity. Understanding the relation between these ... Keywords: Audition, Firing rates, Information theory, Oscillations, Population coding, Vision

Andrei Belitski; Stefano Panzeri; Cesare Magri; Nikos K. Logothetis; Christoph Kayser

2010-12-01T23:59:59.000Z

122

Using a Blackbody to Calculate Net Longwave Responsivity of Shortwave Solar Pyranometers to Correct for Their Thermal Offset Error during Outdoor Calibration Using the Component Sum Method  

Science Conference Proceedings (OSTI)

Thermopile pyranometers’ thermal offset has been recognized since the pyranometer’s inception. This offset is often overlooked or ignored because its magnitude is small compared to the overall solar signal at higher irradiance. With the demand of ...

I. Reda; J. Hickey; C. Long; D. Myers; T. Stoffel; S. Wilcox; J. J. Michalsky; E. G. Dutton; D. Nelson

2005-10-01T23:59:59.000Z

123

First-order quantum correction to the Larmor radiation from a moving charge in a spatially homogeneous time-dependent electric field  

Science Conference Proceedings (OSTI)

First-order quantum correction to the Larmor radiation is investigated on the basis of the scalar QED on a homogeneous background of a time-dependent electric field, which is a generalization of a recent work by Higuchi and Walker so as to be extended for an accelerated charged particle in a relativistic motion. We obtain a simple approximate formula for the quantum correction in the limit of the relativistic motion when the direction of the particle motion is parallel to that of the electric field.

Yamamoto, Kazuhiro; Nakamura, Gen [Department of Physical Science, Hiroshima University, Higashi-Hiroshima 739-8526 (Japan)

2011-02-15T23:59:59.000Z

124

The University of Montana Wilderness Institute is hiring four Wilderness Field Leaders for summer 2013. These positions are full-time from the end of May through August or early September and pay $15-  

E-Print Network (OSTI)

character, and recreation impacts in Anaconda Pintler Wilderness Area on the Beaverhead-Deerlodge and Lolo will be primarily in the Anaconda Pintler Wilderness. Field leaders will spend up to 6 days in the field at a time

Crone, Elizabeth

125

Key Institutional Design Considerations and Resources Required to Develop a Federal Greenhouse Gas Offsets Program in the United Sta tes  

Science Conference Proceedings (OSTI)

Greenhouse gas (GHG) emissions offsets have emerged as a critical element of evolving U.S. climate policy and a critical factor in determining the future price of CO2 emissions and the economic costs of proposed policies. This report evaluates the governmental institutional requirements and resources needed to develop a large-scale national domestic GHG emissions offset program. It also describes potential institutional barriers that might limit the ability of the evolving carbon market to generate signi...

2011-05-25T23:59:59.000Z

126

Modelling of time related drying changes on matte coated paper with artificial neural networks  

Science Conference Proceedings (OSTI)

In this study, the determinability of time related colour changes in prints made using ink that dries on matte coated paper with the offset printing technique and infrared method, has been investigated with artifical neural networks after analysis of ... Keywords: Artificial neural networks, Colour changes, Offset printing

Türkün ?ahïnba?kan; Erdo?an Köse

2010-04-01T23:59:59.000Z

127

Magnetically insulated baffled probe for real-time monitoring of equilibrium and fluctuating values of space potentials, electron and ion temperatures, and densities  

Science Conference Proceedings (OSTI)

By restricting the electron-collection area of a cold Langmuir probe compared to the ion-collection area, the probe floating potential can become equal to the space potential, and thus conveniently monitored, rather than to a value shifted from the space potential by an electron-temperature-dependent offset, i.e., the case with an equal-collection-area probe. This design goal is achieved by combining an ambient magnetic field in the plasma with baffles, or shields, on the probe, resulting in species-selective magnetic insulation of the probe collection area. This permits the elimination of electron current to the probe by further adjustment of magnetic insulation which results in an ion-temperature-dependent offset when the probe is electrically floating. Subtracting the floating potential of two magnetically insulated baffled probes, each with a different degree of magnetic insulation, enables the electron or ion temperature to be measured in real time.

Demidov, V. I.; Koepke, M. E. [Department of Physics, West Virginia University, Morgantown, West Virginia 26506 (United States); Raitses, Y. [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)

2010-10-15T23:59:59.000Z

128

TIME DELAY OF CASCADE RADIATION FOR TeV BLAZARS AND THE MEASUREMENT OF THE INTERGALACTIC MAGNETIC FIELD  

SciTech Connect

Recent claims that the strength B{sub IGMF} of the intergalactic magnetic field (IGMF) is {approx}> 10{sup -15} G are based on upper limits to the expected cascade flux in the GeV band produced by blazar TeV photons absorbed by the extragalactic background light. This limit depends on an assumption that the mean blazar TeV flux remains constant on timescales {approx}> 2(B{sub IGMF}/10{sup -18}G){sup 2}/(E/10 GeV){sup 2} yr for an IGMF coherence length {approx}1 Mpc, where E is the measured photon energy. Restricting TeV activity of 1ES 0229+200 to {approx}3-4 years during which the source has been observed leads to a more robust lower limit of B{sub IGMF} {approx}> 10{sup -18} G, which can be larger by an order of magnitude if the intrinsic source flux above {approx}5-10 TeV from 1ES 0229+200 is strong.

Dermer, Charles D.; Razzaque, Soebur; Finke, Justin D. [Space Science Division, U.S. Naval Research Laboratory, Washington, DC 20375 (United States); Cavadini, Massimo [Dipartimento di Fisica e Matematica, Universita dell'Insubria, via Valleggio 11, 22100, Como (Italy); Chiang, James [W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305 (United States); Lott, Benoit, E-mail: charles.dermer@nrl.navy.mil [CNRS/IN2P3, Centre d' Etudes Nucleaires Bordeaux Gradignan, UMR 5797, Gradignan, 33175 (France)

2011-06-01T23:59:59.000Z

129

Effects of the Sun's time-retarded gravitational field on the orbital motions of Mercury and Halley's Comet  

E-Print Network (OSTI)

The neoclassical causal version for Newton's acausal gravitational theory explains exactly the anomalous speed-changes observed for six Earth flybys and an anomalous lunar orbital speed-change (arXiv:1105.3857v10). This article estimates the effects of the neoclassical causal theory on the orbital motions of two objects revolving around the Sun, Mercury and Halley's Comet. The change in the period for Mercury is predicted to be about +1.86 ms per year, and the predicted change in the angle for perihelion is -0.032 arc seconds per century, for which the magnitude is negligible compared with the relativistic advance of +43 arc seconds per century. The period for Halley's Comet, 75.3 years, is predicted to decrease by about 10 minutes. Therefore, the neoclassical causal theory does not conflict with general relativity theory, and it is not the cause for a delay of one or two weeks in the return time of Halley's Comet.

J. C. Hafele

2011-11-28T23:59:59.000Z

130

Observation of coupled vortex gyrations by 70-ps-time and 20-nm-space- resolved full-field magnetic transmission soft x-ray microscopy  

SciTech Connect

We employed time-and space-resolved full-field magnetic transmission soft x-ray microscopy to observe vortex-core gyrations in a pair of dipolar-coupled vortex-state Permalloy (Ni{sub 80}Fe{sub 20}) disks. The 70 ps temporal and 20 nm spatial resolution of the microscope enabled us to simultaneously measure vortex gyrations in both disks and to resolve the phases and amplitudes of both vortex-core positions. We observed their correlation for a specific vortex-state configuration. This work provides a robust and direct method of studying vortex gyrations in dipolar-coupled vortex oscillators.

Jung, Hyunsung; Yu, Young-Sang; Lee, Ki-Suk; Im, Mi-Young; Fischer, Peter; Bocklage, Lars; Vogel, Andreas; Bolte, Markus; Meier, Guido; Kim, Sang-Koog

2010-09-01T23:59:59.000Z

131

The Thermal Aspects of Relativistic Quantum Field Theory as an Observational Window in a Deeper Layer of Quantum Space-Time or: Dirac's Revenge  

E-Print Network (OSTI)

In this paper we shall derive the thermal properties of the relativistic quantum vacuum from a more primordial underlying structure which shares some properties with the old Dirac-sea picture. We show in particular how the Tomita-KMS structure in RQFT is a consequence of the structure and dynamics of the underlying pattern of vacuum fluctuations. We explain the origin of the doubling phenomenon in thermofield theory and the duality symmetry between a local algebra of fields or observables and its commutant in RQFT and give an interpretation of the notion of thermal time.

Manfred Requardt

2013-09-05T23:59:59.000Z

132

The cost of agriculturally based greenhouse gas offsets in the Texas High Plains  

E-Print Network (OSTI)

The broad objective of this thesis involves investigation of the role agriculture might play in a society wide greenhouse gas emissions reduction effort. Specifically, the breakeven price for carbon emission offsets is calculated for agriculturally based emission reducing practices. The practices investigated in the Texas High Plains involve reduced tillage use, reduced fallow use, reduced crop fertilization, cropland conversion to grassland, feedlot enteric fermentation management and digester based dairy manure handling. Costs of emission reductions were calculated at the producer level. The calculated offset prices are classified into four cost categories. They are: negative cost, low cost (less than $20 per ton of carbon saved), moderate cost ($20 through $100 per ton of carbon saved), and high cost (over $100 for tons of carbon saved). Negative cost implies that farmers could make money and reduce emissions by moving to alternative practices even without any carbon payments. Alternatives in the positive cost categories need compensation to induce farmers to switch to practices that sequester more carbon. All fallow dryland crop practices, dryland and irrigated cotton zero tillage, dryland and irrigated wheat zero tillage, irrigated corn zero tillage, cotton irrigated nitrogen use reduction under minimum tillage and dryland pasture for all systems, and anaerobic lagoon complete mix and plug flow systems fall in the negative cost category. Dryland and irrigated wheat under minimum tillage are found to be in the low cost category. Cotton dryland under minimum tillage and cotton irrigated with nitrogen use reduction under zero tillage fell into the moderate cost class. Both corn and cotton irrigated minimum tillage are found to be in the high cost category. This study only considers the producer foregone net income less fixed costs as the only cost incurred in switching to an alternative sequestering practice. More costs such as learning and risk should probably be included. This limitation along with other constraints such as use of short run budget data, lack of availability and reliability of local budgets, overlooking any market effects, and lack of treatment of costs incurred in selling carbon offsets to buyers are limitations and portend future work.

Chandrasena, Rajapakshage Inoka Ilmi

2003-12-01T23:59:59.000Z

133

Low-Drift Flow Sensor with Zero-Offset Thermopile-Based Power Feedback  

E-Print Network (OSTI)

A thermal flow sensor has been realised consisting of freely-suspended silicon-rich silicon-nitride microchannels with an integrated Al/poly-Si++ thermopile in combination with up- and downstream Al heater resistors. The inherently zero offset of the thermopile is exploited in a feedback loop controlling the dissipated power in the heater resistors, eliminating inevitable influences of resistance drift and mismatch of the thin-film metal resistors. The control system cancels the flow-induced temperature difference across the thermopile by controlling a power difference between both heater resistors, thereby giving a measure for the flow rate. The flow sensor was characterised for power difference versus water flow rates up to 1.5 ul/min, being in good agreement with a thermal model of the sensor, and the correct low-drift operation of the temperature-balancing control system has been verified.

Dijkstra, M; De Boer, Meint; Berenschot, J W; Wiegerink, Remco; Elwenspoek, M

2008-01-01T23:59:59.000Z

134

Offset-free rail-to-rail derandomizing peak detect-and-hold circuit  

Science Conference Proceedings (OSTI)

A peak detect-and-hold circuit eliminates errors introduced by conventional amplifiers, such as common-mode rejection and input voltage offset. The circuit includes an amplifier, three switches, a transistor, and a capacitor. During a detect-and-hold phase, a hold voltage at a non-inverting in put terminal of the amplifier tracks an input voltage signal and when a peak is reached, the transistor is switched off, thereby storing a peak voltage in the capacitor. During a readout phase, the circuit functions as a unity gain buffer, in which the voltage stored in the capacitor is provided as an output voltage. The circuit is able to sense signals rail-to-rail and can readily be modified to sense positive, negative, or peak-to-peak voltages. Derandomization may be achieved by using a plurality of peak detect-and-hold circuits electrically connected in parallel.

DeGeronimo, Gianluigi (Nesconset, NY); O'Connor, Paul (Bellport, NY); Kandasamy, Anand (Coram, NY)

2003-01-01T23:59:59.000Z

135

Band offsets in ZrO{sub 2}/InGaZnO{sub 4} heterojunction  

SciTech Connect

X-ray photoelectron spectroscopy was used to measure the energy discontinuity in the valence band ( White-Up-Pointing-Triangle E{sub V}) of amorphous InGaZnO{sub 4} (a-IGZO)/ZrO{sub 2} heterostructure deposited by DC and RF sputtering at room temperature, respectively. A value of White-Up-Pointing-Triangle E{sub V}= 0 eV was obtained by using the Ga and Zn 2p{sup 3} and In 3d{sup 3} energy levels as references. Given the experimental band gap of 3.1 eV and 5.8 eV for the a-IGZO and ZrO{sub 2}, respectively, this would indicate a conduction band offset of 2.7 eV in the system.

Yao Jianke [School of Computer and Information Engineering, Shenzhen Graduate School, Peking University, Shenzhen 518055 (China); Zhang Shengdong [School of Computer and Information Engineering, Shenzhen Graduate School, Peking University, Shenzhen 518055 (China); Institute of Microelectronics, Peking University, Beijing 100871 (China); Gong Li [Instrumental Analysis and Research Center, Sun Yat-Sen University, Guangzhou 510275 (China)

2012-08-27T23:59:59.000Z

136

Band offsets in HfO{sub 2}/InGaZnO{sub 4} heterojunctions  

SciTech Connect

The valence band discontinuity ({Delta}E{sub V}) of sputter deposited HfO{sub 2}/InZnGaO{sub 4} (IGZO) heterostructures was obtained from x-ray photoelectron spectroscopy measurements. The HfO{sub 2} exhibited a bandgap of 6.07 eV from absorption measurements. A value of {Delta}E{sub V} = 0.48 {+-} 0.025 eV was obtained by using the Ga 2p{sub 3/2}, Zn 2p{sub 3/2}, and In 3d{sub 5/2} energy levels as references. This implies a conduction band offset {Delta}E{sub C} of 2.39 eV in HfO{sub 2}/InGaZnO{sub 4} heterostructures and a nested interface band alignment.

Cho, Hyun [Department of Nanomechatronics Engineering, Pusan National University, Gyeongnam 627-706 (Korea, Republic of); Douglas, E. A.; Gila, B. P.; Craciun, V.; Lambers, E. S.; Pearton, S. J. [Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611 (United States); Ren Fan [Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611 (United States)

2012-01-02T23:59:59.000Z

137

Intensity offset and correction of solid spectral library samples measured behind glass  

SciTech Connect

Accurate and calibrated diffuse reflectance spectra libraries of solids are becoming more important for hyperspectral and multispectral remote sensing exploitation. Many solids are in the form of powders or granules and in order to measure their diffuse reflectance spectra in the laboratory, it is often necessary to place the samples behind a transparent medium such as glass or quartz for the UV, visible or near-infrared spectral regions to prevent their unwanted dispersal into the instrument or laboratory environment. Using both experimental and theoretical methods we have found that for the case of fused quartz this leads to an intensity offset in the reflectance values. Although expected dispersive effects were observed for the fused quartz window in the UV, the measured hemispherical reflectance values are predominantly vertically shifted by the reflectance from the air-quartz and sample-quartz interfaces with intensity dependent offsets leading to measured values up to nearly ?6% too high for a 2% reflectance surface, ?3.8% too high for 10% reflecting materials, approximately correct (to within experimental error) for 40% to 60% diffuse reflecting surfaces, and ?2% too low for 99% reflecting Spectralon surfaces. For the diffuse reflectance case, the measured values are uniformly too low due to the glass, with differences nearly 6% too high for reflectance values approaching 99%. The deviations arise from the added reflections from the quartz surfaces as verified by theory, modeling and experiment. Empirical correction factors were implemented into post-processing software to redress the artifact for hemispherical and diffuse reflectance data across the 300 nm to 2300 nm range.

Bernacki, Bruce E.; Redding, Rebecca L.; Su, Yin-Fong; Brauer, Carolyn S.; Johnson, Timothy J.

2013-05-18T23:59:59.000Z

138

The combined effects on fluid flow during compression of piston bowl shape and offset, and swirl ratio  

SciTech Connect

Computational results are presented of air flow during the compression stroke of three engines with differently shaped piston bowls. The three dimensional computer code uses orthogonal curvilinear coordinate systems to body fit the engine shapes. A parametric variation of bowl offset position and swirl ratio is performed to assess their effects on the mean flow and the turbulence parameters. The bowl shape and swirl ratio are found to be most influential. Bowl offset is less important except when combined with swirl in which case significant effects are made on the mean flow and to a lesser extent on the turbulence.

Watkins, A.P.; Dessipris, S.; Khaleghi, H.

1987-01-01T23:59:59.000Z

139

Agricultural Soil Carbon Sequestration Offset Programs: Strengths, Difficulties, and Suggestions for Their Potential Use in AB 32's Cap and Trade Program  

E-Print Network (OSTI)

offset credits for installing “a biogas control system thatemissions by installing biogas control systems (BCS), whichin exchange for installing biogas control systems (BCS), a

Bernadett, Lauren

2013-01-01T23:59:59.000Z

140

Transient Thermal, Hydraulic, and Mechanical Analysis of a Counter Flow Offset Strip Fin Intermediate Heat Exchanger using an Effective Porous Media Approach.  

E-Print Network (OSTI)

??This work presents a comprehensive thermal hydraulic analysis of a compact heat exchanger using offset strip fins. The thermal hydraulics analysis in this work is… (more)

Urquiza, Eugenio

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "field time offset" 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

Solute-travel time estimates for tile-drained fields. III. Removal of a geothermal brine spill from soil by leaching  

DOE Green Energy (OSTI)

The time required to leach a slug of saline, sodic geothermal brine from the point of injection to the tile outlet of an artificially drained field is calculated. Sprinkler, complete, and partial ponding leaching methods are compared as a function of drain spacing and initial location of the spill, with ponding requiring more water but less time to leach brine out of the system for all situations except where the brine spill occurs near the midpoint between tile lines. Calculation results are presented in dimensionless parameters which scale the drainage system dimensions and the soil water transport properties. A simple calculation is proposed to estimate the volume of leaching fluid required to remove excess Na/sup +/ from the exchange complex, and was found to be in good agreement with the results of laboratory soil column experiments. For fine-textured soils in the Imperial Valley of California it may require up to 30 pore volumes of leaching fluid to lower Na/sup +/ concentrations if saturated gypsum solution is used in reclamation. The results of these calculations suggest that reclamation of fine textured soils could require a prohibitive amount of time unless the brine spill is localized around a drain.

Jury, W.A.; Weeks, L.V.

1978-01-16T23:59:59.000Z

142

Visualisation of Tensor Time Domain Electromagnetic Data  

DOE Green Energy (OSTI)

Long Offset Time Domain Electromagnetic (LOTEM) measurements traditionally use a single current source. By using a second source, a tensor analysis technique analogous to that used in DC resistivity multiple-source bipole-dipole surveying, is possible. An instantaneous apparent resistivity tensor is defined as the relationship between the time varying (total) electric field and the DC half space current density vectors due to each source. If the sources are dipoles the three coordinate invariant apparent resistivities of the tensor are independent of source orientation. For a uniform half space, one of the invariants is virtually constant in time, deviating from the half space resistivity by a maximum of 6%. This method provides a way in which the complicated data set obtained during a tensor LOTEM survey can be presented in a compact and intelligible form, and has many advantages over conventional methods of analyzing LOTEM data particularly where the resistivity distribution is three dimensional (3D). Results from a 3D resistivity model of an idealized geothermal reservoir and outflow structure are used to illustrate the power of this analysis.

Caldwell, T.G.; Bibby, H.M.

1995-01-01T23:59:59.000Z

143

Differential Mobility Spectrometry/Mass Spectrometry: The Design of a New Mass Spectrometer for Real-Time Chemical Analysis in the Field  

SciTech Connect

The design of a prototype, field-portable mass spectrometer (MS) is described. The MS has been designed with an atmospheric interface in order to couple the system to a commercially available differential mobility spectrometer. The differential mobility spectrometer provides selective injection of trace-level analytes of interest into the inlet of the MS for real-time chemical detection. To accomplish this task, the MS design incorporates the use of an electrodynamic ion funnel to transport the ion beam, generated at atmospheric pressure, to the high-vacuum chamber that houses the mass analyzer. This leads to a design that utilizes two stages of differential pumping to achieve an overall pressure drop from atmosphere (760 Torr) to approximately 1 ×

,

2010-08-01T23:59:59.000Z

144

Evaluating the Potential to Develop New Greenhouse Gas Emission Offsets on Electricity Transmission System Rights-of-Way  

Science Conference Proceedings (OSTI)

This report is a final deliverable for a research project conceived and supported by EPRI. This project explored the potential technical feasibility of developing greenhouse gas (GHG) emissions offsets by implementing enhanced Integrated Vegetation Management (IVM) to enhance management of biomass vegetation growing on high-voltage electricity ...

2013-03-30T23:59:59.000Z

145

Developing Greenhouse Gas Emissions Offsets by Reducing Nitrous Oxide (N2O) Emissions in Agricultural Crop Production  

Science Conference Proceedings (OSTI)

This Technical Update covers the first year of a three-year-long EPRI research project entitled Developing Greenhouse Gas Emissions Offsets by Reducing Nitrous Oxide (N2O) Emissions in Agricultural Crop Production. The report provides a project overview and explains the preliminary results yielded from the first year of on-farm research.

2007-10-30T23:59:59.000Z

146

Comparison of acoustic impedance and time-amplitude analysis techniques for reservoir description of a Gulf of Mexico shelf edge Clastic Field  

SciTech Connect

Post-stack, time-amplitude techniques are routinely used in the estimation of reserves and the positioning of wells in low impedance, unconsolidated reservoir sands in the offshore Gulf of Mexico (Texas and Louisiana). Time amplitude analysis of 3D seismic data, when properly calibrated, can yield reliable estimates of net hydrocarbon pay, reservoir distribution, and volumetrics. Acoustic impedance (Al) analysis can also be used for such prospect appraisal and development work. However, the combined use of both techniques for reservoir description is not common. Some advantages in acoustic impedance (over amplitude analysis) are: (1) properly constrained Al traces better image the reservoir rock configuration (that is, they provide a more [open quotes]geologic[close quotes] view) thereby facilitating interpretation of reservoir distribution and interconnectivity, and (2) Al volumetrics methodology can provide more accurate estimates of average pay for reservoirs that are not seismically isolated from one another. A possible disadvantage is the difficulty in incorporating a proper baseline (low frequency) constraint for the required Al trace inversion. This paper reports the advantages and disadvantages of both techniques in characterizing net pay, volumetrics, and reservoir continuity in a producing Gulf of Mexico oil field in a shelf-edge delta depositional system.

Rowlett, H.E.; Holcombe, H.T.; Cohn, B.P.; Wilson, W.W.; Mills, W.H. (BP Exploration Inc., Houston, TX (United States))

1993-02-01T23:59:59.000Z

147

Reverse-order source/drain formation with double offset spacer (RODOS) for CMOS low-power, high-speed and low-noise amplifiers  

Science Conference Proceedings (OSTI)

RODOS (Reverse-Order source/drain formation with Double Offset Spacer) was proposed for low-power, high-speed and low-noise amplifiers. Relying on simulation data, we confirmed the high feasibility of the RODOS process. It showed improved performance ... Keywords: RODOS, amplifier, high-speed, low-noise, low-power, offset spacer, reverse-order

Woo Young Choi; Jong Duk Lee; Byung-Gook Park

2003-08-01T23:59:59.000Z

148

Designing a Large-Scale Federal Greenhouse Gas Offsets Program in the United States: Policy Choices and Lessons Learned from the Cle an Development Mechanism and Other Offsets Programs  

Science Conference Proceedings (OSTI)

If the United States decides to take broader action in the future to mitigate climate change, policy discussions may once again focus on development of a greenhouse gas (GHG) cap-and-trade program combined with development of a large-scale GHG emissions offsets program. The compliance flexibility offered by these programs, and the economic incentives they create to identify and implement low-cost compliance options, have the potential to reduce significantly the costs to achieve significant emissions lim...

2011-11-29T23:59:59.000Z

149

Determination of Band Offsets between the High-k Dielectric LaAlO3 Film and  

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

Determination of Band Offsets Determination of Band Offsets between the High-k Dielectric LaAlO3 Film and the In0.53Ga0.47As Substrate Scaling of conventional silicon based metal-oxide-semiconductor (MOS) transistors requires thinner and thinner SiO2 films. However, the figure 1 Figure 1: Intel 45 nm SRAM chip and IntelrCoreTM2 family processor. Hafnium-based high-k dielectric materials are used in the fabrication of those chips. increase of leakage current through thinner SiO2 films puts a fundamental limit on the existing MOS technology. High dielectric constant (high-k) materials are natural substitutes for SiO2 as insulators because they can maintain sufficient thickness to achieve desired capacitance. In fact, hafnium based high-k dielectric materials are already used by Intel in the

150

Incorporating Offset Projects into Corporate Greenhouse Gas Strategies: Risk Management Under Conditions of Policy and Market Uncert ainty  

Science Conference Proceedings (OSTI)

This report provides information for electric sector companies considering the development of project-based strategies to offset or reduce greenhouse gas (GHG) emissions, as well as insights to help them assess what kinds of projects and strategies are appropriate to their own situations. Effective project-based strategies link investments in specific activities with the emissions reductions they generate, resulting in the creation of mitigation credits with economic value in the emerging GHG marketplace...

2003-12-17T23:59:59.000Z

151

"Blue Sky" Approaches to Reduce Greenhouse Gas Emissions: An Initial Assessment of Potential New Types of Greenhouse Gas Emissions Offsets  

Science Conference Proceedings (OSTI)

This report provides an initial assessment of potential new approaches to reducing greenhouse gas (GHG) emissions that might be capable of generating large-scale GHG emissions offsets at relatively low cost compared to other GHG mitigation options. The nine potential blue sky approaches assessed in this report include biochar, destruction of ozone depleting substances, control of natural fugitive methane seeps from coal seams, control of fugitive natural gas emissions associated with hydraulic fracturing...

2011-12-22T23:59:59.000Z

152

STUDY OF THE THREE-DIMENSIONAL CORONAL MAGNETIC FIELD OF ACTIVE REGION 11117 AROUND THE TIME OF A CONFINED FLARE USING A DATA-DRIVEN CESE-MHD MODEL  

Science Conference Proceedings (OSTI)

We apply a data-driven magnetohydrodynamics (MHD) model to investigate the three-dimensional (3D) magnetic field of NOAA active region (AR) 11117 around the time of a C-class confined flare that occurred on 2010 October 25. The MHD model, based on the spacetime conservation-element and solution-element scheme, is designed to focus on the magnetic field evolution and to consider a simplified solar atomsphere with finite plasma {beta}. Magnetic vector-field data derived from the observations at the photosphere is inputted directly to constrain the model. Assuming that the dynamic evolution of the coronal magnetic field can be approximated by successive equilibria, we solve a time sequence of MHD equilibria based on a set of vector magnetograms for AR 11117 taken by the Helioseismic and Magnetic Imager on board the Solar Dynamic Observatory around the time of the flare. The model qualitatively reproduces the basic structures of the 3D magnetic field, as supported by the visual similarity between the field lines and the coronal loops observed by the Atmospheric Imaging Assembly, which shows that the coronal field can indeed be well characterized by the MHD equilibrium in most cases. The magnetic configuration changes very little during the studied time interval of 2 hr. A topological analysis reveals that the small flare is correlated with a bald patch (BP, where the magnetic field is tangent to the photosphere), suggesting that the energy release of the flare can be understood by magnetic reconnection associated with the BP separatrices. The total magnetic flux and energy keep increasing slightly in spite of the flare, while the computed magnetic free energy drops during the flare by {approx}10{sup 30} erg, which seems to be adequate in providing the energy budget of a minor C-class confined flare.

Jiang Chaowei; Feng Xueshang [SIGMA Weather Group, State Key Laboratory for Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190 (China); Wu, S. T.; Hu Qiang, E-mail: cwjiang@spaceweather.ac.cn, E-mail: fengx@spaceweather.ac.cn, E-mail: wus@uah.edu, E-mail: qh0001@uah.edu [Center for Space Plasma and Aeronomic Research, University of Alabama in Huntsville, Huntsville, AL 35899 (United States)

2012-11-10T23:59:59.000Z

153

Transient Thermal, Hydraulic, and Mechanical Analysis of a Counter Flow Offset Strip Fin Intermediate Heat Exchanger using an Effective Porous Media Approach  

E-Print Network (OSTI)

effect on offset fin heat exchanger performance: predictiveA. L. London. Compact Heat Exchangers. 3 rd ed. , New York,Model for Transient Heat Exchanger Response. ” Int. J. Heat

Urquiza, Eugenio

2009-01-01T23:59:59.000Z

154

Transient Thermal, Hydraulic, and Mechanical Analysis of a Counter Flow Offset Strip Fin Intermediate Heat Exchanger using an Effective Porous Media Approach  

E-Print Network (OSTI)

M. and A. L. London. Compact Heat Exchangers. 3 rd ed. , NewOffset Strip Fin Compact Heat Exchanger. ” ExperimentalKays, W. M. , “Compact Heat Exchangers,” AGARD Lecture Ser.

Urquiza, Eugenio

2009-01-01T23:59:59.000Z

155

Ship-Mounted Real-Time Surface Observational System on board Indian Vessels for Validation and Refinement of Model Forcing Fields  

Science Conference Proceedings (OSTI)

A network of ship-mounted real-time Automatic Weather Stations integrated with Indian geosynchronous satellites [Indian National Satellites (INSATs)] 3A and 3C, named Indian National Centre for Ocean Information Services Real-Time Automatic ...

R. Harikumar; T. M. Balakrishnan Nair; G. S. Bhat; Shailesh Nayak; Venkat Shesu Reddem; S. S. C. Shenoi

2013-03-01T23:59:59.000Z

156

Time Brightness  

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

Perlmutter, et al., in Thermonuclear Supernovae, NATO ASI, v. 486 (1997) Perlmutter, et al., in Thermonuclear Supernovae, NATO ASI, v. 486 (1997) Cosmology from . . . Time Brightness ... . . . 50-100 Fields Lunar Calendar Scheduled Follow-Up Imaging at Hubble, Cerro Tololo, WIYN, Isaac Newton Scheduled Follow-Up Spectroscopy at Keck Almost 1000 Galaxies per Field RESULT: ~24 Type Ia supernovae discovered while still brightening, at new moon Berkeley Lab Keck WIYN Cerro Tololo Isaac Newton Hubble Strategy We developed a strategy to guarantee a group of supernova discoveries on a certain date. Just after a new moon, we observe some 50 to 100 high-galactic lattitute fields-each containing almost a thousand high-redshift galaxies-in two nights on the Cerro Tololo 4-meter telescope with Tyson & Bernstein's wide-field camera. We return three weeks later to observe the same

157

Band offsets for mismatched interfaces: The special case of ZnO on CdTe (001)  

SciTech Connect

High-quality planar interfaces between ZnO and CdTe would be useful in optoelectronic applications, but appear difficult to achieve given the rather different crystal structures (CdTe is zinc blende with cubic lattice constant a = 6.482 Å, ZnO is hexagonal wurtzite with a = 3.253 Å and c = 5.213 Å.) However, ZnO has been reported to occur in some epitaxially stabilized films in the zinc blende structure with an fcc primitive lattice constant close to the hexagonal a value. Observing that this value equals half of the CdTe cubic lattice constant to within 1%, we propose that (001)-oriented cubic ZnO films could be grown epitaxially on a CdTe (001) surface in an R45° ?2??2 configuration. Many terminations and alignments (in-plane fractional translations) are possible, and we describe density-functional total-energy electronic-structure calculations on several configurations to identify the most likely form of the interface, and to predict valence-band offsets between CdTe and ZnO in each case. Growth of ZnO on Te-terminated CdTe (001) is predicted to produce small or even negative (CdTe below ZnO) valence band offsets, resulting in a Type I band alignment. Growth on Cd-terminated CdTe is predicted to produce large positive offsets for a type II alignment as needed, for example, in solar cells. We also describe recent experiments that corroborate some of these predictions.

Jaffe, John E.; Kaspar, Tiffany C.; Droubay, Timothy; Varga, Tamas

2013-08-02T23:59:59.000Z

158

Can the matter-antimatter asymmetry be easier to understand within the "spin-charge-family-theory", predicting twice four families and two times $SU(2)$ vector gauge and scalar fields?  

E-Print Network (OSTI)

This contribution is an attempt to try to understand the matter-antimatter asymmetry in the universe within the {\\it spin-charge-family-theory} if assuming that transitions in non equilibrium processes among instanton vacua and complex phases in mixing matrices are the sources of the matter-antimatter asymmetry, as studied in the literature for several proposed theories. The {\\it spin-charge-family-theory} is, namely, very promising in showing the right way beyond the {\\it standard model}. It predicts families and their mass matrices, explaining the origin of the charges and of the gauge fields. It predicts that there are, after the universe passes through two $SU(2)\\times U(1)$ phase transitions, in which the symmetry breaks from $SO(1,3) \\times SU(2) \\times SU(2) \\times U(1) \\times SU(3)$ first to $SO(1,3) \\times SU(2) \\times U(1) \\times SU(3)$ and then to $SO(1,3) \\times U(1) \\times SU(3)$, twice decoupled four families. The upper four families gain masses in the first phase transition, while the second four families gain masses at the electroweak break. To these two breaks of symmetries the scalar non Abelian fields, the (superposition of the) gauge fields of the operators generating families, contribute. The lightest of the upper four families is stable (in comparison with the life of the universe) and is therefore a candidate for constituting the dark matter. The heaviest of the lower four families should be seen at the LHC or at somewhat higher energies.

N. S. Mankoc Borstnik

2010-11-26T23:59:59.000Z

159

About possibility to measure an electric dipole moment (EDM) of nuclei in the range $10^{-27} ÷10^{-32}$ $e \\cdot cm$ in experiments for search of time-reversal violating generation of magnetic and electric fields  

E-Print Network (OSTI)

The possibility to measure an electric dipole moment (EDM) of nuclei in the range $10^{-27} \\div 10^{-32}$ $e \\cdot cm$ in experiments for search of time-reversal violating generation of magnetic and electric fields is discussed.

Vladimir Baryshevsky

2004-02-19T23:59:59.000Z

160

A Variational Method for Real-Time Retrieval of Three-Dimensional Wind Field from Multiple-Doppler Bistatic Radar Network Data  

Science Conference Proceedings (OSTI)

A variational method for the retrieval of the 3D wind field from bistatic multiple-Doppler radar network data is developed, and its performance is evaluated. This bistatic network consists of one S-band weather radar and two passive low-gain ...

Alain Protat; Isztar Zawadzki

1999-04-01T23:59:59.000Z

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


161

New Hardware and Software Design of a Field-Deployable Real-Time Laser-Based Non-Intrusive Detection System for Measurement of True Travel Time on the Highway  

E-Print Network (OSTI)

Time Laser-Based Prototype Detection System for MeasurementLaser-Based Non-Intrusive Detection System for MeasurementLaser-Based Non-Intrusive Detection System for Measurement

2001-01-01T23:59:59.000Z

162

Time growth rate and field profiles of hybrid modes excited by a relativistic elliptical electron beam in an elliptical metallic waveguide with dielectric rod  

Science Conference Proceedings (OSTI)

The dispersion relation of guided electromagnetic waves propagating in an elliptical metallic waveguide with a dielectric rod driven by relativistic elliptical electron beam (REEB) is investigated. The electric field profiles and the growth rates of the waves are numerically calculated by using Mathieu functions. The effects of relative permittivity constant of dielectric rod, accelerating voltage, and current density of REEB on the growth rate are presented.

Jazi, B.; Rahmani, Z.; Abdoli-Arani, A. [Faculty of Physics, Department of Laser and Photonics, University of Kashan, Kashan (Iran, Islamic Republic of); Heidari-Semiromi, E. [Faculty of Physics, Department of Condense Matter, University of Kashan, Kashan (Iran, Islamic Republic of)

2012-10-15T23:59:59.000Z

163

Corporate Carbon Strategy and Procurement of Greenhouse Gas Emissions Offsets for Compliance with Mandatory Carbon Constraints  

Science Conference Proceedings (OSTI)

This report explores strategies that may be employed by electric companies and other industrial enterprises to reduce their greenhouse gas (GHG) emissions to comply with potential future mandatory GHG emissions reduction programs. It explores the opportunities, challenges and risks associated with reducing GHG emissions from within a company's own operations, as well as other approaches that may be used for compliance such as real-time coal-to-natural gas fuel switching in the regional dispatch of electr...

2010-12-23T23:59:59.000Z

164

Evaluation and Ranking of Geothermal Resources for Electrical Generation or Electrical Offset in Idaho, Montana, Oregon and Washington. Executive Summary.  

DOE Green Energy (OSTI)

The objective was to consolidate and evaluate all geologic, environmental, legal, and institutional information in existing records and files, and to apply a uniform methodology to the evaluation and ranking of all known geothermal sites. This data base would enhance the making of credible forecasts of the supply of geothermal energy which could be available in the region over a 20 year planning horizon. The four states, working under a cooperative agreement, identified a total of 1265 potential geothermal sites. The 1265 sites were screened to eliminate those with little or no chance of providing either electrical generation and/or electrical offset. Two hundred and forty-five of the original 1265 sites were determined to warrant further study. On the basis of a developability index, 78 high temperature sites and 120 direct utilization sites were identified as having ''good'' or ''average'' potential for development and should be studied in detail. On the basis of cost, at least 29 of the high temperature sites appear to be technically capable of supporting a minimum total of at least 1000 MW of electrical generation which could be competitive with the busbar cost of conventional thermal generating technologies. Sixty direct utilization sites have a minimum total energy potential of 900+ MW and can be expected to provide substantial amounts of electrical offset at or below present conventional energy prices. Five direct utilization sites and eight high temperature sites were identified with both high development and economic potential. An additional 27 sites were shown to have superior economic characteristics, but development problems. 14 refs., 15 figs., 10 tabs.

Bloomquist, R. Gordon

1985-06-01T23:59:59.000Z

165

Timing Synchronization and Node Localization in Wireless Sensor Networks: Efficient Estimation Approaches and Performance Bounds  

E-Print Network (OSTI)

Wireless sensor networks (WSNs) consist of a large number of sensor nodes, capable of on-board sensing and data processing, that are employed to observe some phenomenon of interest. With their desirable properties of flexible deployment, resistance to harsh environment and lower implementation cost, WSNs envisage a plethora of applications in diverse areas such as industrial process control, battle- field surveillance, health monitoring, and target localization and tracking. Much of the sensing and communication paradigm in WSNs involves ensuring power efficient transmission and finding scalable algorithms that can deliver the desired performance objectives while minimizing overall energy utilization. Since power is primarily consumed in radio transmissions delivering timing information, clock synchronization represents an indispensable requirement to boost network lifetime. This dissertation focuses on deriving efficient estimators and performance bounds for the clock parameters in a classical frequentist inference approach as well as in a Bayesian estimation framework. A unified approach to the maximum likelihood (ML) estimation of clock offset is presented for different network delay distributions. This constitutes an analytical alternative to prior works which rely on a graphical maximization of the likelihood function. In order to capture the imperfections in node oscillators, which may render a time-varying nature to the clock offset, a novel Bayesian approach to the clock offset estimation is proposed by using factor graphs. Message passing using the max-product algorithm yields an exact expression for the Bayesian inference problem. This extends the current literature to cases where the clock offset is not deterministic, but is in fact a random process. A natural extension of pairwise synchronization is to develop algorithms for the more challenging case of network-wide synchronization. Assuming exponentially distributed random delays, a network-wide clock synchronization algorithm is proposed using a factor graph representation of the network. Message passing using the max- product algorithm is adopted to derive the update rules for the proposed iterative procedure. A closed form solution is obtained for each node's belief about its clock offset at each iteration. Identifying the close connections between the problems of node localization and clock synchronization, we also address in this dissertation the problem of joint estimation of an unknown node's location and clock parameters by incorporating the effect of imperfections in node oscillators. In order to alleviate the computational complexity associated with the optimal maximum a-posteriori estimator, two iterative approaches are proposed as simpler alternatives. The first approach utilizes an Expectation-Maximization (EM) based algorithm which iteratively estimates the clock parameters and the location of the unknown node. The EM algorithm is further simplified by a non-linear processing of the data to obtain a closed form solution of the location estimation problem using the least squares (LS) approach. The performance of the estimation algorithms is benchmarked by deriving the Hybrid Cramer-Rao lower bound (HCRB) on the mean square error (MSE) of the estimators. We also derive theoretical lower bounds on the MSE of an estimator in a classical frequentist inference approach as well as in a Bayesian estimation framework when the likelihood function is an arbitrary member of the exponential family. The lower bounds not only serve to compare various estimators in our work, but can also be useful in their own right in parameter estimation theory.

Ahmad, Aitzaz 1984-

2012-12-01T23:59:59.000Z

166

THE BNL ASTD FIELD LAB - NEAR - REAL - TIME CHARACTERIZATION OF BNL STOCKPILED SOILS TO ACCELERATE COMPLETION OF THE EM CHEMICAL HOLES PROJECT.  

SciTech Connect

As of October 2001, approximately 7,000 yd{sup 3} of stockpiled soil remained at Brookhaven National Laboratory (BNL) after the remediation of the BNL Chemical/Animal/Glass Pits disposal area. The soils were originally contaminated with radioactive materials and heavy metals, depending on what materials had been interred in the pits, and how the pits were excavated. During the 1997 removal action, the more hazardous/radioactive materials were segregated, along with, chemical liquids and solids, animal carcasses, intact gas cylinders, and a large quantity of metal and glass debris. Nearly all of these materials have been disposed of. In order to ensure that all debris was removed and to characterize the large quantity of heterogeneous soil, BNL initiated an extended sorting, segregation, and characterization project directed at the remaining soil stockpiles. The project was co-funded by the Department of Energy Environmental Management Office (DOE EM) through the BNL Environmental Restoration program and through the DOE EM Office of Science and Technology Accelerated Site Technology Deployment (ASTD) program. The focus was to remove any non-conforming items, and to assure that mercury and radioactive contaminant levels were within acceptable limits for disposal as low-level radioactive waste. Soils with mercury concentrations above allowable levels would be separated for disposal as mixed waste. Sorting and segregation were conducted simultaneously. Large stockpiles (ranging from 150 to 1,200 yd{sup 3}) were subdivided into manageable 20 yd{sup 3} units after powered vibratory screening. The 1/2-inch screen removed almost all non-conforming items (plus some gravel). Non-conforming items were separated for further characterization. Soil that passed through the screen was also visually inspected before being moved to a 20 yd{sup 3} ''subpile.'' Eight samples from each subpile were collected after establishing a grid of four quadrants: north, east, south and west, and two layers: top and bottom. Field personnel collected eight 100-gram samples, plus quality assurance (QA) duplicates for chemical analysis, and a 1-liter jar of material for gamma spectroscopy. After analyses were completed and reviewed, the stockpiles were reconstructed for later disposal as discrete entities within a disposal site profile. A field lab was set up in a trailer close to the stockpile site, equipped with instrumentation to test for mercury, RCRA metals, and gamma spectroscopy, and a tumbler for carrying out a modified Toxicity Characteristic Leaching Procedure (TCLP) protocol. Chemical analysis included X-ray fluorescence (XRF) to screen for high (>260 ppm) total mercury concentrations, and modified TCLP tests to verify that the soils were not RCRA hazardous. The modified TCLP tests were 1/10th scale, to minimize secondary (leachate) waste and maximize tumbler capacity and sampler throughput. TCLP leachate analysis was accomplished using a Milestone Direct Mercury Analyzer (DMA80). Gamma spectroscopy provided added assurance of previously measured Am-241, Cs-137, and Co-60 contamination levels.

BOWERMAN,B.S.; ADAMS,J.W.; HEISER,J.; KALB,P.D.; LOCKWOOD,A.

2003-04-01T23:59:59.000Z

167

Partial CO2 Column-Averaged Dry-Air Mixing Ratio from Measurements by Coherent 2-?m Differential Absorption and Wind Lidar with Laser Frequency Offset Locking  

Science Conference Proceedings (OSTI)

A coherent 2-?m differential absorption and wind lidar (Co2DiaWiL) with a 2-?m single-frequency Q-switched laser with laser frequency offset locking was used for long-range CO2 measurement. The frequency stabilization of the single-frequency ? on ...

Shoken Ishii; Kohei Mizutani; Philippe Baron; Hironori Iwai; Ryoko Oda; Toshikazu Itabe; Hirotake Fukuoka; Takayoshi Ishikawa; Mizuki Koyama; Tomoaki Tanaka; Isamu Morino; Osamu Uchino; Atsushi Sato; Kazuhiro Asai

2012-09-01T23:59:59.000Z

168

Evaluation and Ranking of Geothermal Resources for Electrical Generation or Electrical Offset in Idaho, Montana, Oregon and Washington. Executive Summary  

DOE Green Energy (OSTI)

In 1983, the Bonneville Power Administration contracted for an evaluation and ranking of all geothermal resource sites in the states of Idaho, Montana, Oregon, and Washington which have a potential for electrical generation and/or electrical offset through direct utilization of the resource. The objective of this program was to consolidate and evaluate all geologic, environmental, legal, and institutional information in existing records and files, and to apply a uniform methodology to the evaluation and ranking of all known geothermal sites. This data base would enhance the making of credible forecasts of the supply of geothermal energy which could be available in the region over a 20 year planning horizon. The four states, working together under a cooperative agreement, identified a total of 1,265 potential geothermal sites. The 1,265 sites were screened to eliminate those with little or no chance of providing either electrical generation and/or electrical offset. Two hundred and forty-five of the original 1,265 sites were determined to warrant further study. The Four-State team proceeded to develop a methodology which would rank the sites based upon an estimate of development potential and cost. Development potential was estimated through the use of weighted variables selected to approximate the attributes which a geothermal firm might consider in its selection of a site for exploration and possible development. Resource; engineering; and legal, institutional, and environmental factors were considered. Cost estimates for electrical generation and direct utilization sites were made using the computer programs CENTPLANT, WELLHEAD, and HEATPLAN. Finally, the sites were ranked utilizing a technique which allowed for the integration of development and cost information. On the basis of the developability index, 78 high temperature sites and 120 direct utilization sites were identified as having ''good'' or ''average'' potential for development and should be studied in detail. On the basis of cost, at least 29 of the high temperature sites appear to be technically capable of supporting a minimum total of at least 1,000 MW of electrical generation which could be competitive with the busbar cost of conventional thermal generating technologies. Sixty direct utilization sites have a minimum total energy potential of 900+ MW and can be expected to provide substantial amounts of electrical offset at or below present conventional energy prices. The combined development and economic rankings can be used to assist in determining sites with superior characteristics of both types. Five direct utilization sites and eight high temperature sites were identified with both high development and economic potential. An additional 27 sites were shown to have superior economic characteristics, but development problems. The procedure seems validated by the fact that two of the highest ranking direct utilization sites are ones that have already been developed--Boise, Idaho and Klamath Falls, Oregon. Most of the higher ranking high temperature sites have received serious examination in the past as likely power production candidates.

Bloomquist, R.G.; Black, G.L.; Parker, D.S.; Sifford, A.; Simpson, S.J.; Street, L.V.

1985-06-01T23:59:59.000Z

169

Economizers; a Field Perspective and Case Studies  

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

Economizers; a Field Perspective and Case Studies Economizers; a Field Perspective and Case Studies Speaker(s): David Sellers Date: January 18, 2011 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Liping Wang Economizers are a common HVAC process with the potential to deliver significant energy savings by using outdoor air cooling to offset internal loads. But evidence from the field suggests that their track record is not good in terms of delivering those savings. This talk will provide a field perspective on some of the issues behind the poor track record, frequently illustrated with mini-case studies, and will conclude with a case study of a dysfunctional economizer in a cold environment and how the problem it was having was corrected by applying some of the concepts discussed earlier in the talk

170

EBU Technical Information I21-1996 Offset in back focal distance for television cameras with CCD sensors  

E-Print Network (OSTI)

Introduction The introduction of CCD cameras some years ago brought with it a change in camera design in the sense that the sensors are cemented to the beam-splitter surface. This means that, unlike the situation in tubetype cameras, it is not possible to adjust the back focal distance in CCD cameras. To accommodate this situation, lenses will have to be manufactured to very tight tolerances, taking account of the properties of the glass material used in the beam-splitter block. However, during the development of CCD cameras, at least two different glass materials are in use for the manufacture of beamsplitters. In order to achieve interchangeability of lenses between cameras using different prism designs, the manufacturers have reached agreement concerning the positions of the red and blue image planes relative to the green image place. Two de facto standards have emerged, one for the 2/3-inch format, the other for the 1/2inch format. 2. Offset characteristics

Ebu Committee First

1996-01-01T23:59:59.000Z

171

1 String field theory  

E-Print Network (OSTI)

This elementary introduction to string field theory highlights the features and the limitations of this approach to quantum gravity as it is currently understood. String field theory is a formulation of string theory as a field theory in space-time with an infinite number of massive fields. Although existing constructions of string field theory require expanding around a fixed choice of space-time background, the theory is in principle background-independent, in the sense that different backgrounds can be realized as different field configurations in the theory. String field theory is the only string formalism developed so far which, in principle, has the potential to systematically address questions involving multiple asymptotically distinct string backgrounds. Thus, although it is not yet well defined as a quantum theory, string field theory may eventually be helpful for understanding questions related to cosmology in string theory. 1.1

W. Taylor

2006-01-01T23:59:59.000Z

172

Injection-locking of two frequency-doubled lasers with 3.2 GHz offset for driving Raman transitions with low photon scattering in $^{43}$Ca$^+$  

E-Print Network (OSTI)

We describe the injection locking of two infrared (794 nm) laser diodes which are each part of a frequency doubled laser system. An acousto-optic modulator (AOM) in the injection path gives an offset of 1.6 GHz between the lasers for driving Raman transitions between states in the hyperfine split (by 3.2 GHz) ground level of $^{43}$Ca$^+$. The offset can be disabled for use in $^{40}$Ca$^+$. We measure the relative linewidth of the frequency-doubled beams to be 42 mHz in an optical heterodyne measurement. The use of both injection locking and frequency doubling combines spectral purity with high optical power. Our scheme is applicable for providing Raman beams across other ion species and neutral atoms where coherent optical manipulation is required.

Linke, N M; Lucas, D M

2013-01-01T23:59:59.000Z

173

Measurement of the valence band-offset in a PbSe/ZnO heterojunction by x-ray photoelectron spectroscopy  

SciTech Connect

A heterojunction of PbSe/ZnO has been grown by molecular beam epitaxy. X-ray photoelectron spectroscopy was used to directly measure the valence-band offset (VBO) of the heterojunction. The VBO, {Delta}E{sub V}, was determined as 2.51 {+-} 0.05 eV using the Pb 4p{sup 3/2} and Zn 2p{sup 3/2} core levels as a reference. The conduction-band offset, {Delta}E{sub C}, was, therefore, determined to be 0.59 {+-} 0.05 eV based on the above {Delta}E{sub V} value. This analysis indicates that the PbSe/ZnO heterojunction forms a type I (Straddling Gap) heterostructure.

Li Lin; Qiu Jijun; Weng Binbin; Yuan Zijian; Shi Zhisheng [School of Electrical and Computer Engineering, University of Oklahoma, Norman, Oklahoma 73019 (United States); Li Xiaomin; Gan Xiaoyan [State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China); Sellers, Ian R. [Deparment of Physics, University of Oklahoma, Norman, Oklahoma 73019 (United States)

2012-12-24T23:59:59.000Z

174

Noncommutative Two Time Physics  

E-Print Network (OSTI)

We present a classical formalism describing two-time physics with Abelian canonical gauge field backgrounds. The formalism can be used as a starting point for the construction of an interacting quantized two-time physics theory in a noncommutative soace-time.

W. Chagas-Filho

2006-04-03T23:59:59.000Z

175

Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots  

E-Print Network (OSTI)

Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots Sedat Nizamoglu, Pedro Ludwig Hernández-Martínez, Evren Mutlugun, Durmus misfit strains on the band offsets of Zn1-xBexO/ZnO quantum wells: A first-principles analysis J. Appl

Demir, Hilmi Volkan

176

Band offsets of Al{sub 2}O{sub 3} and HfO{sub 2} oxides deposited by atomic layer deposition technique on hydrogenated diamond  

SciTech Connect

High-k oxide insulators (Al{sub 2}O{sub 3} and HfO{sub 2}) have been deposited on a single crystalline hydrogenated diamond (H-diamond) epilayer by an atomic layer deposition technique at temperature as low as 120 Degree-Sign C. Interfacial electronic band structures are characterized by X-ray photoelectron spectroscopy. Based on core-level binding energies and valence band maximum values, valence band offsets are found to be 2.9 {+-} 0.2 and 2.6 {+-} 0.2 eV for Al{sub 2}O{sub 3}/H-diamond and HfO{sub 2}/H-diamond heterojunctions, respectively. Band gaps of the Al{sub 2}O{sub 3} and HfO{sub 2} have been determined to be 7.2 {+-} 0.2 and 5.4 {+-} 0.2 eV by measuring O 1s energy loss spectra, respectively. Both the Al{sub 2}O{sub 3}/H-diamond and HfO{sub 2}/H-diamond heterojunctions are concluded to be type-II staggered band configurations with conduction band offsets of 1.2 {+-} 0.2 and 2.7 {+-} 0.2 eV, respectively.

Liu, J. W.; Liao, M. Y.; Imura, M. [Optical and Electronic Materials Unit, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Koide, Y. [Optical and Electronic Materials Unit, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Nanofabrication Platform, NIMS, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan); Center of Materials Research for Low Carbon Emission, NIMS, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)

2012-12-17T23:59:59.000Z

177

Managing time  

Science Conference Proceedings (OSTI)

Professionals overwhelmed with information glut can find hope from new insights about time management.

Peter J. Denning

2011-03-01T23:59:59.000Z

178

Saturated hydraulic conductivity determined by on ground mono-offset Ground-Penetrating Radar inside a single ring infiltrometer  

E-Print Network (OSTI)

In this study we show how to use GPR data acquired along the infiltration of water inside a single ring infiltrometer to inverse the saturated hydraulic conductivity. We used Hydrus-1D to simulate the water infiltration. We generated water content profiles at each time step of infiltration, based on a particular value of the saturated hydraulic conductivity, knowing the other van Genuchten parameters. Water content profiles were converted to dielectric permittivity profiles using the Complex Refractive Index Method relation. We then used the GprMax suite of programs to generate radargrams and to follow the wetting front using arrival time of electromagnetic waves recorded by a Ground-Penetrating Radar (GPR). Theoretically, the 1D time convolution between reflectivity and GPR signal at any infiltration time step is related to the peak of the reflected amplitude recorded in the corresponding trace in the radargram. We used this relation ship to invert the saturated hydraulic conductivity for constant and fallin...

Léger, Emmanuel; Coquet, Yves

2013-01-01T23:59:59.000Z

179

Time-resolved x-ray scattering instrumentation  

DOE Patents (OSTI)

An apparatus and method for increased speed and efficiency of data compilation and analysis in real time is presented in this disclosure. Data is sensed and grouped in combinations in accordance with predetermined logic. The combinations are grouped so that a simplified reduced signal results, such as pairwise summing of data values having offsetting algebraic signs, thereby reducing the magnitude of the net pair sum. Bit storage requirements are reduced and speed of data compilation and analysis is increased by manipulation of shorter bit length data values, making real time evaluation possible.

Borso, C.S.

1985-11-21T23:59:59.000Z

180

Entropic Time  

Science Conference Proceedings (OSTI)

The formulation of quantum mechanics within the framework of entropic dynamics includes several new elements. In this paper we concentrate on one of them: the implications for the theory of time. Entropic time is introduced as a book-keeping device to keep track of the accumulation of changes. One new feature is that, unlike other concepts of time appearing in the so-called fundamental laws of physics, entropic time incorporates a natural distinction between past and future.

Caticha, Ariel [Department of Physics, University at Albany-SUNY, Albany, NY 12222 (United States)

2011-03-14T23:59:59.000Z

Note: This page contains sample records for the topic "field time offset" 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

Experimental determination of band offsets at the SnS/CdS and SnS/InS{sub x}O{sub y} heterojunctions  

Science Conference Proceedings (OSTI)

The semidirect x-ray photoelectron spectroscopy technique was used to measure the band alignments at the interface of heterostructures based on SnS. The layers were deposited by electrochemical deposition (ECD), chemical bath deposition (CBD), or photochemical deposition (PCD). The following four kinds of heterojunctions were characterized. (1) ECD-SnS/PCD-CdS. (2) CBD-SnS/PCD-CdS. (3) ECD-SnS/ECD-InS{sub x}O{sub y}. (4) CBD-SnS/ECD-InS{sub x}O{sub y}. The valence band offsets {Delta}E{sub V} of those four heterojunctions are determined to be 1.34, 1.59, 0.77, and 0.74{+-}0.3 eV, respectively.

Abdel Haleem, A. M.; Ichimura, M. [Department of Engineering Physics, Electronics and Mechanics, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555 (Japan)

2010-02-15T23:59:59.000Z

182

Sequence optimization to reduce velocity offsets in cardiovascular magnetic resonance volume flow quantification - A multi-vendor study  

E-Print Network (OSTI)

of interest may lead to phase-encode wraparound hinder- ing conventional background correction post-processing if still needed. Sequence development might also focus on a more fundamental level of eddy current compensation, such as sequence... and Correcting Gradient Errors in Non-Cartesian Imaging: Are Gradient Errors Linear Time-Invariant (LTI)? Magn Reson Med 2009, 62:1466-1476. 16. Bernstein MA, King KF, Zhou XHJ: Correction Gradients - Eddy Current Compensation. Handbook of MRI pulse sequences...

Rolf, Marijn P; Hofman, Mark B M; Gatehouse, Peter D; Markenroth Bloch, Karin; Heymans, Martijn W; Ebbers, Tino; Graves, Martin J; Totman, John J; Werner, Beat; Rossum, Albert C van; Kilner, Philip J; Heethaar, Rob M

2011-03-09T23:59:59.000Z

183

TIMING APPARATUS  

DOE Patents (OSTI)

The timing device comprises an escapement wheel and pallet, a spring drive to rotate the escapement wheel to a zero position, means to wind the pretensioned spring proportional to the desired signal time, and a cam mechanism to control an electrical signal switch by energizing the switch when the spring has been wound to the desired position, and deenergizing it when it reaches the zero position. This device produces an accurately timed signal variably witain the control of the operator.

Bennett, A.E.; Geisow, J.C.H.

1956-04-17T23:59:59.000Z

184

Evidence for glyphosate damage of winter wheat depending on waiting-times after pre-crop glyphosate application and density of desiccated weed plants under field and experimental conditions  

E-Print Network (OSTI)

times for sowing after pre-crop glyphosate application aretimes before sowing of the subsequent crop resulted in muchstronger and longer lasting crop damage than the same amount

Bott, Sebastian; Lebender, Ulrike; Yoon, Duck-Joong; Tesfamariam, Tsehaye; Römheld, Volker; Neumann, Günter

2009-01-01T23:59:59.000Z

185

Optimal Real-time Dispatch for Integrated Energy Systems  

E-Print Network (OSTI)

and cooling offsets from absorption cooling) using optimaland/or cooling (via absorption cooling) demand. This methodscen,t) ? scen,t The absorption cooling offset is equal to

Firestone, Ryan Michael

2007-01-01T23:59:59.000Z

186

Crosswell Seismic Amplitude-Versus-Offset for Detailed Imaging of Facies and Fluid Distribution within Carbonate Oil Reservoirs  

Science Conference Proceedings (OSTI)

Crosswell seismic surveys were conducted at two fields in northern Michigan. One of these, Springdale, included two monitor wells that are located external to the reef, and the other, Coldspring, employed two production wells within the reef. The Springdale wells extended to much greater depths than the reef, and imaging was conducted from above and from beneath the reef. The resulting seismic images provide the best views of pinnacle Niagaran reefs obtained to date. The tops of the reservoirs can be clearly distinguished, and their lateral extent or dipping edges can be observed along the profile. Reflecting events internal to the reef are evident; some of them are fairly continuous across the reef and others are discontinuous. Inversion of the seismic data indicates which events represent zones of higher porosity and which are lower porosity or even anhydrite plugged. The full stacked image includes angles that are beyond critical for many of the interfaces, and some reflections are visible only for a small range of angles, presumably near their critical angle. Stacking these angles in provides an opportunity for these events to be seen on the stacked image, where otherwise they would have been unrecognized. For inversion, however, the complexity associated with phase changes beyond critical can lead to poor results, and elastic inversion of partial angle stacks may be best conducted with restrictions to angles less than critical. Strong apparent attenuation of signals occurs when seismic ray paths pass through the upper part of the Springdale reservoir; this may be due to intrinsic attenuation and/or scattering of events due to the locally strongly varying gas saturation and extremely low fluid pressures. Signal-to-noise limitations become evident far from the source well in the Coldspring study, probably because the raw data were strongly affected by tube-wave noise generated by flow through the perforation of the receiver well. The seismic images obtained, and interpretations of them, as assisted by Amplitude-versus-Angle studies and accompanying inversion, provide additional insight into the internal geometry of these two reefs and provide data that should be useful for reservoir management.

Wayne Pennington; Mohamed Ibrahim; Roger Turpening; Sean Trisch; Josh Richardson; Carol Asiala; Walid Mabrouk

2008-09-30T23:59:59.000Z

187

Field practice internship final report  

SciTech Connect

This field practice internship final report gives an overview of the field practice, which was completed at the Oak Ridge Y-12 Plant, Martin Marietta Energy Systems, Inc., Environmental Management Department, Oak Ridge, Tennessee. The field practice focused on the completion of the Superfund Amendments and Reauthorization Act (SARA) Title III, Emergency Planning and Community Right-to-Know Act Section 312, Tier II Report. The field practice internship was conducted on a full-time basis between December 13, 1993 through February 18, 1994. Sheila Poligone, Emergency Planning and Community Right-to-Know Act (EPCRA) Coordinator served as the field practice preceptor.

Foster, T.

1994-05-01T23:59:59.000Z

188

Field reversed ion rings  

DOE Green Energy (OSTI)

In typical field-reversed ion ring experiments, an intense annular ion beam is injected across a plasma-filled magnetic cusp region into a neutral gas immersed in a ramped solenoidal magnetic field. Assuming the characteristic ionization time is much shorter than the long ({ital t}{approx_gt}2{pi}/{Omega}{sub {ital i}}) beam evolution time scale, we investigate the formation of an ion ring in the background plasma followed by field reversal, using a 21/2-D hybrid, PIC code FIRE, in which the beam and background ions are treated as particles and the electrons as a massless fluid. We show that beam bunching and trapping occurs downstream in a ramped magnetic field for an appropriate set of experimental parameters. We find that a compact ion ring is formed and a large field reversal {zeta}={delta}{ital B}/{ital B}{approx_gt}1 on axis develops. We also observe significant deceleration of the ring on reflection due to the transfer of its axial momentum to the background ions, which creates favorable trapping conditions. {copyright} {ital 1995 American Institute of Physics.}

Sudan, R.N.; Omelchenko, Y.A. [Laboratory of Plasma Studies, Cornell University, Ithaca, New York 14853 (United States)

1995-09-01T23:59:59.000Z

189

Digestion time  

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

Digestion time Digestion time Name: Don Mancosh Location: N/A Country: N/A Date: N/A Question: I have always given the rule of thumb in class that material we eat is with us for about 24 hours before exiting the body. The question arises about the time value of liquids. Getting a big coke prior to a 3 hour drive generally means that there will be a stop along the way. Is there a generalization made about liquids in the body similar to the one for solid food? Replies: A physician would give a better answer, but I hazard this: the only liquids which people consume (deliberately) in significant quantities are water, ethyl alcohol and various oils. Water and alcohol are absorbed on a time scale of seconds to minutes through the mouth, stomach and digestive tract. The oils are huge molecules, so I'd guess like any other greasy food they get absorbed in the upper digestive tract. Some of them, perhaps the longest and most nonpolar, are not absorbed at all --- cf. the old-time remedy of mineral oil for constipation --- so there should be some average time-before-what's-left-is-excreted such as you're looking for, and my (wild) guess is that it would not differ substantially from that for food. You can define an average lifetime in the body for alcohol, since the natural level is zero. Rough guidelines are widespread in the context of drunk driving laws. But this is not really possible for water. One's body is normally full up to the brim with water, and there's no way for the body to distinguish between water molecules recently absorbed and molecules that've been moping around since the Beatles split up. Thus the water entering the toilet bowl after the pit stop is not in general the same water as was in the big coke. If you were to consider for water just the average time between drinking and peeing, it would seem to depend strongly on how well hydrated the body was before the drink, and how much was drunk. During sustained heavy exertion in the sun and dry air one can easily drink a pint of water an hour without peeing at all. On the other hand, if one is willing to drink enough water fast enough, so as to establish a high excess of body water one can pee 8 ounces 15 minutes or less after drinking 8 ounces.

190

Space Time Matter inflation  

E-Print Network (OSTI)

We study a model of power-law inflationary inflation using the Space-Time-Matter (STM) theory of gravity for a five dimensional (5D) canonical metric that describes an apparent vacuum. In this approach the expansion is governed by a single scalar (neutral) quantum field. In particular, we study the case where the power of expansion of the universe is $p \\gg 1$. This kind of model is more successful than others in accounting for galaxy formation.

Mariano Anabitarte; Mauricio Bellini

2005-08-31T23:59:59.000Z

191

Field Research Challenge Site  

DOE Green Energy (OSTI)

Previous experiments at the Rifle, Colorado Integrated Field Research Challenge (IFRC) site demonstrated that field-scale addition of acetate to groundwater reduced the ambient soluble uranium concentration. In this report, sediment samples collected before and after acetate field addition were used to assess the active microbes via {sup 13}C acetate stable isotope probing on 3 phases [coarse sand, fines (8-approximately 150 {micro}m), groundwater (0.2-8 {micro}m)] over a 24-day time frame. TRFLP results generally indicated a stronger signal in {sup 13}C-DNA in the 'fines' fraction compared to the sand and groundwater. Before the field-scale acetate addition, a Geobacter-like group primarily synthesized {sup 13}C-DNA in the groundwater phase, an alpha Proteobacterium primarily grew on the fines/sands, and an Acinetobacter sp. and Decholoromonas-like OTU utilized much of the {sup 13}C acetate in both groundwater and particle-associated phases. At the termination of the field-scale acetate addition, the Geobacter-like species was active on the solid phases rather than the groundwater, while the other bacterial groups had very reduced newly synthesized DNA signal. These findings will help to delineate the acetate utilization patterns of bacteria in the field and can lead to improved methods for stimulating distinct microbial populations in situ.

Kerkhof, L.; Williams, K.H.; Long, P.E.; McGuinness, L.

2011-02-21T23:59:59.000Z

192

Field ionization from carbon nanofibers  

E-Print Network (OSTI)

The Micro Gas Analyzer project aims to develop power-efficient, high resolution, high sensitivity, portable and real-time gas sensors. We developed a field ionizer array based on gated CNTs. Arrays of CNTs are used because ...

Adeoti, Bosun J

2008-01-01T23:59:59.000Z

193

Correlation Models for Temperature Fields  

Science Conference Proceedings (OSTI)

This paper presents derivations of some analytical forms for spatial correlations of evolving random fields governed by a white-noise-driven damped diffusion equation that is the analog of autoregressive order 1 in time and autoregressive order 2 ...

Gerald R. North; Jue Wang; Marc G. Genton

2011-11-01T23:59:59.000Z

194

Field Sampling | Open Energy Information  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » Field Sampling Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Field Sampling Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Field Techniques Exploration Sub Group: Field Sampling Parent Exploration Technique: Field Techniques Information Provided by Technique Lithology: Rock samples are used to define lithology. Field and lab analyses can be used to measure the chemical and isotopic constituents of rock samples. Stratigraphic/Structural: Can reveal relatively high permeability zones. Provides information about the time and environment which formed a particular geologic unit. Microscopic rock textures can be used to estimate the history of stress and strain, and/or faulting.

195

Eddy-Current-Induced Multipole Field Calculations  

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

Eddy-Current-Induced Multipole Field Calculations Eddy-Current-Induced Multipole Field Calculations September 29, 2003 1 Eddy-Current-Induced Multipole Field Calculations Nicholas S. Sereno, Suk H. Kim 1.0 Abstract Time-varying magnetic fields of magnets in booster accelerators induce substantial eddy currents in the vacuum chambers. The eddy currents in turn act to produce various multi- pole fields that act on the beam. These fields must be taken into account when doing a lat- tice design. In the APS booster, the relatively long dipole magnets (3 meters) are linearly ramped to accelerate the injected 325 MeV beam to 7 GeV. Substantial dipole and sextu- pole fields are generated in the elliptical vacuum chamber from the induced eddy currents. In this note, formulas for the induced dipole and sextupole fields are derived for elliptical and rectangular vacuum chambers for a time-varying dipole field. A discussion is given

196

Light Field Appearance Manifolds  

E-Print Network (OSTI)

Abstract. Statistical shape and texture appearance models are powerful image representations, but previously had been restricted to 2D or 3D shapes with smooth surfaces and lambertian reflectance. In this paper we present a novel 3D appearance model using image-based rendering techniques, which can represent complex lighting conditions, structures, and surfaces. We construct a light field manifold capturing the multi-view appearance of an object class and extend the direct search algorithm of Cootes and Taylor to match new light fields or 2D images of an object to a point on this manifold. When matching to a 2D image the reconstructed light field can be used to render unseen views of the object. Our technique differs from previous view-based active appearance models in that model coefficients between views are explicitly linked, and that we do not model any pose variation within the shape model at a single view. It overcomes the limitations of polygonal based appearance models and uses light fields that are acquired in real-time. 1

Chris Mario Christoudias; Trevor Darrell

2004-01-01T23:59:59.000Z

197

Time-Varying z-Transform for the Analysis of Discrete-Time Linear Time Periodic Systems  

Science Conference Proceedings (OSTI)

This article deals with a new representation of linear discrete-time periodic systems. This representation, based on the time-varying z-transform, turns out to be highly efficient in the field of automatic control, when an appropriate choice of ... Keywords: Nyquist criterion, final value theorem, initial value theorem, linear discrete-time periodic systems, time-varying z-transform, time-varying frequency response, time-varying systems

A. Garcia Iturricha; J. Sabatier; A. Oustaloup

2003-07-01T23:59:59.000Z

198

Measuring output factors of small fields formed by collimator jaws and multileaf collimator using plastic scintillation detectors  

SciTech Connect

Purpose: As the practice of using high-energy photon beams to create therapeutic radiation fields of subcentimeter dimensions (as in intensity-modulated radiotherapy or stereotactic radiosurgery) grows, so too does the need for accurate verification of beam output at these small fields in which standard practices of dose verification break down. This study investigates small-field output factors measured using a small plastic scintillation detector (PSD), as well as a 0.01 cm{sup 3} ionization chamber. Specifically, output factors were measured with both detectors using small fields that were defined by either the X-Y collimator jaws or the multileaf collimator (MLC). Methods: A PSD of 0.5 mm diameter and 2 mm length was irradiated with 6 and 18 MV linac beams. The PSD was positioned vertically at a source-to-axis distance of 100 cm, at 10 cm depth in a water phantom, and irradiated with fields ranging in size from 0.5x0.5 to 10x10 cm{sup 2}. The field sizes were defined either by the collimator jaws alone or by a MLC alone. The MLC fields were constructed in two ways: with the closed leaves (i.e., those leaves that were not opened to define the square field) meeting at either the field center line or at a 4 cm offset from the center line. Scintillation light was recorded using a CCD camera and an estimation of error in the median-filtered signals was made using the bootstrapping technique. Measurements were made using a CC01 ionization chamber under conditions identical to those used for the PSD. Results: Output factors measured by the PSD showed close agreement with those measured using the ionization chamber for field sizes of 2.0x2.0 cm{sup 2} and above. At smaller field sizes, the PSD obtained output factors as much as 15% higher than those found using the ionization chamber by 0.6x0.6 cm{sup 2} jaw-defined fields. Output factors measured with no offset of the closed MLC leaves were as much as 20% higher than those measured using a 4 cm leaf offset. Conclusions: The authors' results suggest that PSDs provide a useful and possibly superior alternative to existing dosimetry systems for small fields, as they are inherently less susceptible to volume-averaging and perturbation effects than larger, air-filled ionization chambers. Therefore, PSDs may provide more accurate small-field output factor determination, regardless of the collimation mechanism.

Klein, David M.; Tailor, Ramesh C.; Archambault, Louis; Wang, Lilie; Therriault-Proulx, Francois; Beddar, A. Sam [Department of Radiation Physics, Unit 94, University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030 (United States); Departement de Radio Oncologie, Hotel Dieu de Quebec, 11 Cote du Palais Quebec, Quebec G1R 2J6 (Canada); Department of Radiation Physics, Unit 94, University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030 (United States); Department of Radiation Physics, Unit 94, University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030 (United States) and Departement de Radio Oncologie, Hotel Dieu de Quebec, 11 Cote du Palais Quebec, Quebec G1R 2J6 (Canada); Department of Radiation Physics, Unit 94, University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030 (United States)

2010-10-15T23:59:59.000Z

199

Developing High-Quality Field Program Sounding Datasets  

Science Conference Proceedings (OSTI)

Enormous resources of time, effort, and finances are expended in collecting field program rawinsonde (sonde) datasets. Correcting the data and performing quality control (QC) in a timely fashion after the field phase of an experiment are important for ...

Paul E. Ciesielski; Patrick T. Haertel; Richard H. Johnson; Junhong Wang; Scot M. Loehrer

2012-03-01T23:59:59.000Z

200

Field quality issues in iron-dominated dipoles at low fields  

Science Conference Proceedings (OSTI)

In order to help assess the usable dynamic range of iron-dominated dipoles, field shape data at low field on several Fermi-lab accelerator dipole designs are presented. Emphasis is placed on the systematic and random values of the low field sextupole since it is the first ``allowed`` field error. The Main Injector dipoles provide four times smaller sextupole and more than 20 times less sextupole hysteresis than earlier designs for the Main Ring.

Brown, B.C.

1996-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "field time offset" 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

Pair Production in Rotating Electric Fields  

E-Print Network (OSTI)

We explore Schwinger pair production in rotating time-dependent electric fields using the real-time DHW formalism. We determine the time evolution of the Wigner function as well as asymptotic particle distributions neglecting back-reactions on the electric field. Whereas qualitative features can be understood in terms of effective Keldysh parameters, the field rotation leaves characteristic imprints in the momentum distribution that can be interpreted in terms of interference and multiphoton effects. These phenomena may seed characteristic features of QED cascades created in the antinodes of a high-intensity standing wave laser field.

Blinne, Alexander

2013-01-01T23:59:59.000Z

202

Pair Production in Rotating Electric Fields  

E-Print Network (OSTI)

We explore Schwinger pair production in rotating time-dependent electric fields using the real-time DHW formalism. We determine the time evolution of the Wigner function as well as asymptotic particle distributions neglecting back-reactions on the electric field. Whereas qualitative features can be understood in terms of effective Keldysh parameters, the field rotation leaves characteristic imprints in the momentum distribution that can be interpreted in terms of interference and multiphoton effects. These phenomena may seed characteristic features of QED cascades created in the antinodes of a high-intensity standing wave laser field.

Alexander Blinne; Holger Gies

2013-11-07T23:59:59.000Z

203

Field Techniques | Open Energy Information  

Open Energy Info (EERE)

Field Techniques Field Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Field Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Field Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: Map surface geology and hydrothermal alteration. Rock samples are used to define lithology. Field and lab analyses can be used to measure the chemical and isotopic constituents of rock samples. Bulk and trace element analysis of rocks, minerals, and sediments. Identify and document surface geology and mineralogy. Rapid and unambiguous identification of unknown minerals.[1] Stratigraphic/Structural: Locates active faults in the area of interest. Map fault and fracture patterns, kinematic information. Can reveal relatively high permeability zones. Provides information about the time and environment which formed a particular geologic unit. Microscopic rock textures can be used to estimate the history of stress and strain, and/or faulting.

204

A relativistically covariant version of Bohm's quantum field theory for the scalar field  

E-Print Network (OSTI)

We give a relativistically covariant, wave-functional formulation of Bohm's quantum field theory for the scalar field based on a general foliation of space-time by space-like hypersurfaces. The wave functional, which guides the evolution of the field, is space-time-foliation independent but the field itself is not. Hence, in order to have a theory in which the field may be considered a beable, some extra rule must be given to determine the foliation. We suggest one such rule based on the eigen vectors of the energy-momentum tensor of the field itself.

George Horton; Chris Dewdney

2004-07-13T23:59:59.000Z

205

Suppressant: Electric Fields  

Science Conference Proceedings (OSTI)

*. Bookmark and Share. Suppressant:Electric Fields. Fire Extinguishment of Pool Flames by Means of a DC electric Field.. ...

2011-11-04T23:59:59.000Z

206

Internal split field generator  

DOE Patents (OSTI)

A generator includes a coil of conductive material. A stationary magnetic field source applies a stationary magnetic field to the coil. An internal magnetic field source is disposed within a cavity of the coil to apply a moving magnetic field to the coil. The stationary magnetic field interacts with the moving magnetic field to generate an electrical energy in the coil.

Thundat; ,Thomas George (Knoxville, TN); Van Neste, Charles W. (Kingston, TN); Vass, Arpad Alexander (Oak Ridge, TN)

2012-01-03T23:59:59.000Z

207

Modeling of CBM production, CO{sub 2} injection, and tracer movement at a field CO{sub 2} sequestration site  

SciTech Connect

Sequestration of carbon dioxide in unmineable coal seams is a potential technology mainly because of the potential for simultaneous enhanced coalbed methane production (ECBM). Several pilot tests have been performed around the globe leading to mixed results. Numerous modeling efforts have been carried out successfully to model methane production and carbon dioxide (CO{sub 2}) injection. Sensitivity analyses and history matching along with several optimization tools were used to estimate reservoir properties and to investigate reservoir performance. Geological and geophysical techniques have also been used to characterize field sequestration sites and to inspect reservoir heterogeneity. The fate and movement of injected CO{sub 2} can be determined by using several monitoring techniques. Monitoring of perfluorocarbon (PFC) tracers is one of these monitoring technologies. As a part of this monitoring technique, a small fraction of a traceable fluid is added to the injection wellhead along with the CO{sub 2} stream at different times to monitor the timing and location of the breakthrough in nearby monitoring wells or offset production wells. A reservoir modeling study was performed to simulate a pilot sequestration site located in the San Juan coal basin of northern New Mexico. Several unknown reservoir properties at the field site were estimated by modeling the coal seam as a dual porosity formation and by history matching the methane production and CO{sub 2} injection. In addition to reservoir modeling of methane production and CO{sub 2} injection, tracer injection was modeled. Tracers serve as a surrogate for determining potential leakage of CO{sub 2}. The tracer was modeled as a non-reactive gas and was injected into the reservoir as a mixture along with CO{sub 2}. Geologic and geometric details of the field site, numerical modeling details of methane production, CO{sub 2} injection, and tracer injection are presented in this paper. Moreover, the numerical predictions of the tracer arrival times were compared with the measured field data. Results show that tracer modeling is useful in investigating movement of injected CO{sub 2} into the coal seam at the field site. Also, such new modeling techniques can be utilized to determine potential leakage pathways, and to investigate reservoir anisotropy and heterogeneity.

Siriwardane, Hema J.; Bowes, Benjamin D.; Bromhal, Grant S.; Gondle, Raj K.; Wells, Arthur W.; Strazisar, Brian R.

2012-07-01T23:59:59.000Z

208

New advances in designing energy efficient time synchronization schemes for wireless sensor networks  

E-Print Network (OSTI)

Time synchronization in wireless sensor networks (WSNs) is essential and significant for maintaining data consistency, coordination, and performing other fundamental operations, such as power management, security, and localization. Energy efficiency is the main concern in designing time synchronization protocols for WSNs because of the limited and generally nonrechargeable power resources. In this dissertation, the problem of time synchronization is studied in three different aspects to achieve energy efficient time synchronization in WSNs. First, a family of novel joint clock offset and skew estimators, based on the classical two-way message exchange model, is developed for time synchronization in WSNs. The proposed joint clock offset and skew correction mechanisms significantly increase the period of time synchronization, which is a critical factor in the over-all energy consumption required for global network synchronization. Moreover, the Cramer-Rao bounds for the maximum likelihood estimators are derived under two different delay assumptions. These analytical metrics serve as good benchmarks for the experimental results thus far reported. Second, this dissertation proposes a new time synchronization protocol, called the Pairwise Broadcast Synchronization (PBS), which aims at minimizing the number of message transmissions and implicitly the energy consumption necessary for global synchronization of WSNs. A novel approach for time synchronization is adopted in PBS, where a group of sensor nodes are synchronized by only overhearing the timing messages of a pair of sensor nodes. PBS requires a far smaller number of timing messages than other well-known protocols and incurs no loss in synchronization accuracy. Moreover, for densely deployed WSNs, PBS presents significant energy saving. Finally, this dissertation introduces a novel adaptive time synchronization protocol, named the Adaptive Multi-hop Timing Synchronization (AMTS). According to the current network status, AMTS optimizes crucial network parameters considering the energy efficiency of time synchronization. AMTS exhibits significant benefits in terms of energy-efficiency, and can be applied to various types of sensor network applications having different requirements.

Noh, Kyoung Lae

2007-08-01T23:59:59.000Z

209

Real-Time In-Situ Water (& Air) Field Monitor  

2 Managed by UT-Battelle Presentation_namefor the U.S. Department of Energy The Problem: Environmental impact of VOCs and high cost of monitoring

210

Elastoplastic Phase Field Model for Time-Dependent Hydrogen ...  

Science Conference Proceedings (OSTI)

First Principles Modeling of Shape Memory Alloy Magnetic Refrigeration Materials ... of Gamma Prime Precipitates in a Commercial Nickel Base Superalloy.

211

Daylighting field study : Daylighting The New York Times Building  

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

mockup to develop our thinking and to evaluate a few examples of automated faade management and daylight harvesting systems." - Glenn Hughes, Director of Construction, The New...

212

Visualization of time-dependent seismic vector fields with glyphs  

E-Print Network (OSTI)

eases computation in the fragment shader. This technique islookup [AMHH08], while the shader code for procedural dipolegenerate 25 to 58 fragment shader operations. There are

McQuinn, Emmett

2010-01-01T23:59:59.000Z

213

CENAMEP AIP: Time and Frequency Laboratory current status  

Science Conference Proceedings (OSTI)

... DC batteries, UPS and power generator (backup for 3 days ... Phase and Frequency Offset Generator with the master clock for ... Two signal generators. ...

2012-10-09T23:59:59.000Z

214

Microbial field pilot study  

Science Conference Proceedings (OSTI)

The objective of this project is to perform a microbial enhanced oil recovery field pilot in the Southeast Vassar Vertz Sand Unit (SEVVSU) in Payne County, Oklahoma. Indigenous, anaerobic, nitrate reducing bacteria will be stimulated to selectively plug flow paths which have been referentially swept by a prior waterflood. This will force future flood water to invade bypassed regions of the reservoir and increase sweep efficiency. This report covers progress made during the second year, January 1, 1990 to December 31, 1990, of the Microbial Field Pilot Study project. Information on reservoir ecology, surface facilities design, operation of the unit, core experiments, modeling of microbial processes, and reservoir characterization and simulation are presented in the report. To better understand the ecology of the target reservoir, additional analyses of the fluids which support bacteriological growth and the microbiology of the reservoir were performed. The results of the produced and injected water analysis show increasing sulfide concentrations with respect to time. In March of 1990 Mesa Limited Partnership sold their interest in the SEVVSU to Sullivan and Company. In April, Sullivan and Company assumed operation of the field. The facilities for the field operation of the pilot were refined and implementation was begun. Core flood experiments conducted during the last year were used to help define possible mechanisms involved in microbial enhanced oil recovery. The experiments were performed at SEVVSU temperature using fluids and inoculum from the unit. The model described in last year`s report was further validated using results from a core flood experiment. The model was able to simulate the results of one of the core flood experiments with good quality.

Knapp, R.M.; McInerney, M.J.; Menzie, D.E.; Chisholm, J.L.

1992-03-01T23:59:59.000Z

215

Microbial field pilot study  

Science Conference Proceedings (OSTI)

The objective of this project is to perform a microbial enhanced oil recovery field pilot in the Southeast Vassar Vertz Sand Unit (SEVVSU) in Payne County, Oklahoma. Indigenous, anaerobic, nitrate reducing bacteria will be stimulated to selectively plug flow paths which have been referentially swept by a prior waterflood. This will force future flood water to invade bypassed regions of the reservoir and increase sweep efficiency. This report covers progress made during the second year, January 1, 1990 to December 31, 1990, of the Microbial Field Pilot Study project. Information on reservoir ecology, surface facilities design, operation of the unit, core experiments, modeling of microbial processes, and reservoir characterization and simulation are presented in the report. To better understand the ecology of the target reservoir, additional analyses of the fluids which support bacteriological growth and the microbiology of the reservoir were performed. The results of the produced and injected water analysis show increasing sulfide concentrations with respect to time. In March of 1990 Mesa Limited Partnership sold their interest in the SEVVSU to Sullivan and Company. In April, Sullivan and Company assumed operation of the field. The facilities for the field operation of the pilot were refined and implementation was begun. Core flood experiments conducted during the last year were used to help define possible mechanisms involved in microbial enhanced oil recovery. The experiments were performed at SEVVSU temperature using fluids and inoculum from the unit. The model described in last year's report was further validated using results from a core flood experiment. The model was able to simulate the results of one of the core flood experiments with good quality.

Knapp, R.M.; McInerney, M.J.; Menzie, D.E.; Chisholm, J.L.

1992-03-01T23:59:59.000Z

216

Agricultural Soil Carbon Sequestration Offset Programs: Strengths, Difficulties, and Suggestions for Their Potential Use in AB 32's Cap and Trade Program  

E-Print Network (OSTI)

five times that of carbon dioxide. 63 Manure managementgreenhouse gas emissions. Carbon dioxide is perhaps the mostin millions of tons of carbon dioxide equivalent (MMTCO 2

Bernadett, Lauren

2013-01-01T23:59:59.000Z

217

ENTO 489 Field Entomology Field Project Plan  

E-Print Network (OSTI)

ENTO 489 ­ Field Entomology Field Project Plan GENERAL Title: A Taxonomic Survey of Late Summer will be using aerial sweep nets as our only technique to collect the butterflies because this is the best way: · Materials needed to implement the project in the field include: o 2 aerial sweep nets o 2-4 killing jars set

Behmer, Spencer T.

218

Linear electric field mass spectrometry  

DOE Patents (OSTI)

A mass spectrometer and methods for mass spectrometry. The apparatus is compact and of low weight and has a low power requirement, making it suitable for use on a space satellite and as a portable detector for the presence of substances. High mass resolution measurements are made by timing ions moving through a gridless cylindrically symmetric linear electric field.

McComas, David J. (Los Alamos, NM); Nordholt, Jane E. (Los Alamos, NM)

1992-01-01T23:59:59.000Z

219

Linear electric field mass spectrometry  

DOE Patents (OSTI)

A mass spectrometer and methods for mass spectrometry are described. The apparatus is compact and of low weight and has a low power requirement, making it suitable for use on a space satellite and as a portable detector for the presence of substances. High mass resolution measurements are made by timing ions moving through a gridless cylindrically symmetric linear electric field. 8 figs.

McComas, D.J.; Nordholt, J.E.

1992-12-01T23:59:59.000Z

220

Linear electric field mass spectrometry  

DOE Patents (OSTI)

A mass spectrometer is described having a low weight and low power requirement, for use in space. It can be used to analyze the ionized particles in the region of the spacecraft on which it is mounted. High mass resolution measurements are made by timing ions moving through a gridless cylindrically sysmetric linear electric field.

McComas, D.J.; Nordholt, J.E.

1991-03-29T23:59:59.000Z

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


221

External split field generator  

DOE Patents (OSTI)

A generator includes a coil disposed about a core. A first stationary magnetic field source may be disposed on a first end portion of the core and a second stationary magnetic field source may be disposed on a second end portion of core. The first and second stationary magnetic field sources apply a stationary magnetic field to the coil. An external magnetic field source may be disposed outside the coil to apply a moving magnetic field to the coil. Electrical energy is generated in response to an interaction between the coil, the moving magnetic field, and the stationary magnetic field.

Thundat, Thomas George (Knoxville, TN); Van Neste, Charles W. (Kingston, TN); Vass, Arpad Alexander (Oak Ridge, TN)

2012-02-21T23:59:59.000Z

222

Gluon field distribution in baryons  

E-Print Network (OSTI)

Methods for revealing the distribution of gluon fields within the three-quark static-baryon potential are presented. In particular, we outline methods for studying the sensitivity of the source on the emerging vacuum response for the three-quark system. At the same time, we explore the possibility of revealing gluon-field distributions in three-quark systems in QCD without the use of gauge-dependent smoothing techniques. Renderings of flux tubes from a preliminary high-statistics study on a 12^3 X 24 lattice are presented.

F. Bissey; F-G. Cao; A. Kitson; B. G. Lasscock; D. B. Leinweber; A. I. Signal; A. G. Williams; J. M. Zanotti

2005-01-05T23:59:59.000Z

223

Motional Spin Relaxation in Large Electric Fields  

E-Print Network (OSTI)

We discuss the precession of spin-polarized Ultra Cold Neutrons (UCN) and $^{3}$He atoms in uniform and static magnetic and electric fields and calculate the spin relaxation effects from motional $v\\times E$ magnetic fields. Particle motion in an electric field creates a motional $v\\times E$ magnetic field, which when combined with collisions, produces variations of the total magnetic field and results in spin relaxation of neutron and $^{3}$He samples. The spin relaxation times $T_{1}$ (longitudinal) and $T_{2}$ (transverse) of spin-polarized UCN and $^{3}$He atoms are important considerations in a new search for the neutron Electric Dipole Moment at the SNS \\emph{nEDM} experiment. We use a Monte Carlo approach to simulate the relaxation of spins due to the motional $v\\times E$ field for UCN and for $^{3}$He atoms at temperatures below $600,\\mathrm{mK}$. We find the relaxation times for the neutron due to the $v\\times E$ effect to be long compared to the neutron lifetime, while the $^{3}$He relaxation times may be important for the \\emph{nEDM} experiment.

Riccardo Schmid; B. Plaster; B. W. Filippone

2008-05-16T23:59:59.000Z

224

ARM - Field Campaign - Precision Gas Sampling (PGS) Validation Field  

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

govCampaignsPrecision Gas Sampling (PGS) Validation Field Campaign govCampaignsPrecision Gas Sampling (PGS) Validation Field Campaign Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Precision Gas Sampling (PGS) Validation Field Campaign 2006.01.01 - 2006.12.31 Lead Scientist : Marc Fischer For data sets, see below. Description Accurate prediction of the regional responses of CO2 flux to changing climate, land use, and management requires models that are parameterized and tested against measurements made in multiple land cover types and over seasonal to inter-annual time scales. In an extension of our earlier work on crop systems, we investigated the effects of burning on the cycles of carbon, water, and energy in an example of grazed land of the Southern Great Plains. In collaboration with Dr. Herman Mayeux, of the USDA Grazing

225

ARM - Field Campaign - Precision Gas Sampling (PGS) Validation Field  

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

govCampaignsPrecision Gas Sampling (PGS) Validation Field Campaign govCampaignsPrecision Gas Sampling (PGS) Validation Field Campaign Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Precision Gas Sampling (PGS) Validation Field Campaign 2004.04.15 - 2004.12.15 Lead Scientist : Marc Fischer For data sets, see below. Description Accurate prediction of the regional responses of CO2 flux to changing climate, land use, and management requires models that are parameterized and tested against measurements made in multiple land cover types and over seasonal to inter-annual time scales. Models predicting fluxes for un-irrigated agriculture were posed with the challenge of characterizing the onset and severity of plant water stress. We conducted a study that quantified the spatial heterogeneity and temporal variations in land

226

Probes of strong-field gravity  

E-Print Network (OSTI)

In this thesis, I investigate several ways to probe gravity in the strong-field regime. These investigations focus on observables from the gravitational dynamics, i.e. when time derivatives are large: thus I focus on sources ...

Stein, Leo Chaim

2012-01-01T23:59:59.000Z

227

Chiral effective field theory and nuclear forces  

E-Print Network (OSTI)

We review how nuclear forces emerge from low-energy QCD via chiral effective field theory. The presentation is accessible to the non-specialist. At the same time, we also provide considerable detailed information (mostly in appendices) for the benefit of researchers who wish to start working in this field.

Machleidt, R

2011-01-01T23:59:59.000Z

228

Precise shape analysis using field sensitivity  

Science Conference Proceedings (OSTI)

We present a static shape analysis technique to infer the shapes of the heap structures created by a program at run time. Our technique is field sensitive in that it uses field information to compute the shapes. The shapes of the heap structures are ... Keywords: Compilers, Dataflow analysis, Heap analysis, Shape analysis, Static analysis

Sandeep Dasgupta, Amey Karkare, Vinay Kr Reddy

2013-06-01T23:59:59.000Z

229

Magnetic Fields from Electrical Appliances and Devices  

Science Conference Proceedings (OSTI)

A major emphasis of research addressing potential health effects associated with power-frequency magnetic fields has been on assessing exposure to magnetic fields attributable to loads and their associated ground currents flowing on electrical transmission and distribution systems. Though these exposures can vary widely both over time and among residences, they are nonetheless present virtually all of the time. These exposures have remained a focus of attention for the scientific community largely becaus...

2010-09-28T23:59:59.000Z

230

Time and Frequency Portal  

Science Conference Proceedings (OSTI)

NIST Home > Time and Frequency Portal. Time and Frequency Portal. Programs and Projects. CODATA values of the fundamental constants ...

2013-06-27T23:59:59.000Z

231

Time Series and Forecasting  

Science Conference Proceedings (OSTI)

Time Series and Forecasting. Leigh, Stefan and Perlman, S. (1991). "An Index for Comovement of Time Sequences With ...

232

Remote field eddy current inspection  

SciTech Connect

The Remote Field Eddy Current (RFEC) technique uses an internal probe to inspect conducting tubes nondestructively. A coaxial solenoidal exciter, energized with low frequency AC, and detector coils near the inside of the pipe wall are separated by about two pipe diameters to obtain through wall transmission and equal sensitivity to defects on the outside or inside of the pipe wall. Calculation methods are outlined and the voltage plane polar plot signal representation for defect measurement is described. Slit defect interactions in ferromagnetic and non-ferromagnetic tubes are discussed. Defect-induced anomalous fields are interpreted in terms of anomalous source eddy current and missing magnetization defect models. The use of computer animations to represent the time variations of high resolution field measurements and calculations is described.

Atherton, D.L. [Queen`s Univ., Kingston, Ontario (Canada). Dept. of Physics

1995-11-01T23:59:59.000Z

233

Decay processes in an inhomogeneous time-varying plasma  

SciTech Connect

The decay of a homogeneous pump field in an inhomogeneous time-varying plasma into a plasma wave and an ion-acoustic wave is considered theoretically.

Andreev, A.A.; Fedorov, V.I.

1977-12-01T23:59:59.000Z

234

The Induced Electric Field Distribution in Solar Atmosphere  

E-Print Network (OSTI)

A method of calculating induced electric field is presented in this paper. Induced electric field in solar atmosphere is derived by the time variation of magnetic field when the charged particle accumulation is neglected. In order to get the spatial distribution of magnetic field, several extrapolation methods are introduced. With observational data from Helioseismic and Magnetic Imager (HMI) aboard the NASA's Solar Dynamics Observatory (SDO) on May 20th, 2010, we extrapolate the magnetic field to the upper atmosphere from the photosphere. By calculating the time variation of magnetic field, we can get the induced electric field. The derived induced electric field can reach a value of 100 V/cm and the average electric field has a maximum point at the layer of 360 km above the photosphere. The Monte Carlo statistics method is used to compute the triple integration of induced electric field.

Chen, Rong; Deng, Yuanyong

2013-01-01T23:59:59.000Z

235

BUFFERED WELL FIELD OUTLINES  

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

OIL & GAS FIELD OUTLINES FROM BUFFERED WELLS The VBA Code below builds oil & gas field boundary outlines (polygons) from buffered wells (points). Input well points layer must be a...

236

Bell's Jump Process in Discrete Time  

E-Print Network (OSTI)

The jump process introduced by J. S. Bell in 1986, for defining a quantum field theory without observers, presupposes that space is discrete whereas time is continuous. In this letter, our interest is to find an analogous process in discrete time. We argue that a genuine analog does not exist, but provide examples of processes in discrete time that could be used as a replacement.

Jonathan Barrett; Matthew Leifer; Roderich Tumulka

2005-06-08T23:59:59.000Z

237

Far field acceleration  

SciTech Connect

Far fields are propagating electromagnetic waves far from their source, boundary surfaces, and free charges. The general principles governing the acceleration of charged particles by far fields are reviewed. A survey of proposed field configurations is given. The two most important schemes, Inverse Cerenkov acceleration and Inverse free electron laser acceleration, are discussed in detail.

Fernow, R.C.

1995-07-01T23:59:59.000Z

238

Magnetic field generator  

DOE Patents (OSTI)

A magnetic field generating device provides a useful magnetic field within a specific retgion, while keeping nearby surrounding regions virtually field free. By placing an appropriate current density along a flux line of the source, the stray field effects of the generator may be contained. One current carrying structure may support a truncated cosine distribution, and it may be surrounded by a current structure which follows a flux line that would occur in a full coaxial double cosine distribution. Strong magnetic fields may be generated and contained using superconducting cables to approximate required current surfaces.

Krienin, Frank (Shoreham, NY)

1990-01-01T23:59:59.000Z

239

Aging Logarithmic Galilean Field Theories  

E-Print Network (OSTI)

We analytically compute correlation and response functions of scalar operators for the systems with Galilean and corresponding aging symmetries for general spatial dimensions $d$ and dynamical exponent $z$, along with their logarithmic and logarithmic squared extensions, using the gauge/gravity duality. These non-conformal extensions of the aging geometry are marked by two dimensionful parameters, eigenvalue $\\mathcal M$ of an internal coordinate and aging parameter $\\alpha$. We further perform systematic investigations on two-time response functions for general $d$ and $z$, and identify the growth exponent as a function of the scaling dimensions $\\Delta$ of the dual field theory operators and aging parameter $\\alpha$ in our theory. The initial growth exponent is only controlled by $\\Delta$, while its late time behavior by $\\alpha$ as well as $\\Delta$. These behaviors are separated by a time scale order of the waiting time. We attempt to make contact our results with some field theoretical growth models, such as Kim-Kosterlitz model at higher number of spatial dimensions $d$.

Seungjoon Hyun; Jaehoon Jeong; Bom Soo Kim

2013-03-29T23:59:59.000Z

240

BUFFERED WELL FIELD OUTLINES  

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

OIL & GAS FIELD OUTLINES FROM BUFFERED WELLS OIL & GAS FIELD OUTLINES FROM BUFFERED WELLS The VBA Code below builds oil & gas field boundary outlines (polygons) from buffered wells (points). Input well points layer must be a feature class (FC) with the following attributes: Field_name Buffer distance (can be unique for each well to represent reservoirs with different drainage radii) ...see figure below. Copy the code into a new module. Inputs: In ArcMap, data frame named "Task 1" Well FC as first layer (layer 0). Output: Polygon feature class in same GDB as the well points FC, with one polygon field record (may be multiple polygon rings) per field_name. Overlapping buffers for the same field name are dissolved and unioned (see figure below). Adds an attribute PCTFEDLAND which can be populated using the VBA

Note: This page contains sample records for the topic "field time offset" 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

Picosecond Electric Field CARS; A Diagnostic Technique to Measure the Electric Field Development within Nanosecond Repetitively Pulsed Plasmas.  

E-Print Network (OSTI)

??In this thesis, a novel technique is presented to take measurements of an electric field which develops and changes rapidly in time. The motivation arises… (more)

Goldberg, Benjamin M.

2012-01-01T23:59:59.000Z

242

Compiling for time predictability  

Science Conference Proceedings (OSTI)

Within the T-CREST project we work on hardware/software architectures and code-generation strategies for time-predictable embedded and cyber-physical systems. In this paper we present the single-path code generation approach that we plan to explore and ... Keywords: compilers, real-time systems, time predictability, worst-case execution-time analysis

Peter Puschner; Raimund Kirner; Benedikt Huber; Daniel Prokesch

2012-09-01T23:59:59.000Z

243

Certifying execution time  

Science Conference Proceedings (OSTI)

In this paper we present the framework Abstraction-Carrying CodE Platform for Timing validation (ACCEPT), designed for timing analysis of embedded real-time systems using the worst-case execution time (WCET) as the safety parameter. In the context ...

Vítor Rodrigues; João Pedro Pedroso; Mário Florido; Simão Melo de Sousa

2011-05-01T23:59:59.000Z

244

Field emission electron source  

DOE Patents (OSTI)

A novel field emitter material, field emission electron source, and commercially feasible fabrication method is described. The inventive field emission electron source produces reliable electron currents of up to 400 mA/cm.sup.2 at 200 volts. The emitter is robust and the current it produces is not sensitive to variability of vacuum or the distance between the emitter tip and the cathode. The novel emitter has a sharp turn-on near 100 volts.

Zettl, Alexander Karlwalter (Kensington, CA); Cohen, Marvin Lou (Berkeley, CA)

2000-01-01T23:59:59.000Z

245

Abandoned Texas oil fields  

SciTech Connect

Data for Texas abandoned oil fields were primarily derived from two sources: (1) Texas Railroad Commission (TRRC), and (2) Dwight's ENERGYDATA. For purposes of this report, abandoned oil fields are defined as those fields that had no production during 1977. The TRRC OILMASTER computer tapes were used to identify these abandoned oil fields. The tapes also provided data on formation depth, gravity of oil production, location (both district and county), discovery date, and the cumulative production of the field since its discovery. In all, the computer tapes identified 9211 abandoned fields, most of which had less than 250,000 barrel cumulative production. This report focuses on the 676 abandoned onshore Texas oil fields that had cumulative production of over 250,000 barrels. The Dwight's ENERGYDATA computer tapes provided production histories for approximately two-thirds of the larger fields abandoned in 1966 and thereafter. Fields which ceased production prior to 1966 will show no production history nor abandonment date in this report. The Department of Energy hopes the general availability of these data will catalyze the private sector recovery of this unproduced resource.

1980-12-01T23:59:59.000Z

246

TYPES OF FIELD TESTING  

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

TYPES OF FIELD TESTING Convincing proof of energy savings and performance in a specific building and occupant context If direct proof of savings is desired, the only feasible...

247

Outdoor science field trips.  

E-Print Network (OSTI)

??The purpose of this study was to assess the cognitive and affective values of an outdoor science field trip. Participants were 28 fifth grade students,… (more)

Loyd, Kerrie Anne Therese

2004-01-01T23:59:59.000Z

248

Electromagnetic Lorenz Fields  

E-Print Network (OSTI)

Gauge transformations are potential transformations that leave only specific Maxwell fields invariant. To reveal more, I develop Lorenz field equations with full Maxwell form for nongauge, sans gauge function, transformations yielding mixed, superposed retarded and outgoing, potentials. The form invariant Lorenz condition is then a charge conservation equivalent. This allows me to define three transformation classes that screen for Lorenz relevance. The nongauge Lorentz conditions add polarization fields which support emergent, light-like rays that convey energy on charge conserving phase points. These localized rays escape discovery in modern Maxwell fields where the polarizations are suppressed by gauge transformations.

H. C. Potter

2008-10-07T23:59:59.000Z

249

Time-Resolved  

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

Time-Resolved Time-Resolved Time-Resolved Print Of the four fundamental parameters that we use to perceive the physical world (energy, momentum, position, and time) three correspond to the three broad categories of synchrotron experimental measurement techniques: spectroscopy (energy), scattering (momentum), and imaging (position). The fourth parameter-time-can in principle be applied to all the techniques. At the ALS, many experiments can be carried out in real time, with data being recorded from the same sample as it changes over time. Some time-resolved experiments take advantage of the pulsed nature of the ALS's synchrotron radiation, which, like a strobe light, can capture a series of "snapshots" of a process that, when viewed sequentially, show us how a given process evolves over time. Other experiments simply require two pulses: one to "pump" energy into the sample system and a second to probe the system's excited state.

250

Non-flat time-variable dark energy cosmology  

E-Print Network (OSTI)

We generalize the time-variable dark energy scalar field $\\Phi$ model ($\\Phi$CDM) to non-flat space. We show that even in the space-curvature-dominated epoch the scalar field solution is a time-dependent fixed point or attractor, with scalar field energy density that grows relative to the energy density in spatial curvature. This is the first example of a physically consistent and complete model of dynamical dark energy in a non-flat geometry.

Pavlov, Anatoly; Saaidi, Khaled; Ratra, Bharat

2013-01-01T23:59:59.000Z

251

Event detection in sensor networks for modern oil fields  

Science Conference Proceedings (OSTI)

We report the experience of implementing event detection analytics to monitor and forewarn oil production failures in modern, digitized oil fields. Modern oil fields are equipped with thousands of sensors and gauges to measure various physical and chemical ... Keywords: digital oil field, event warning, gas, industry, near real time analytics, oil, petroleum, surveillance

Matthew Hill; Murray Campbell; Yuan-Chi Chang; Vijay Iyengar

2008-07-01T23:59:59.000Z

252

Novel motor design for rotating anode x-ray tubes operating in the fringe field of a magnetic resonance imaging system  

SciTech Connect

Purpose: Using hybrid x-ray/MR (XMR) systems for image guidance during interventional procedures could enhance the diagnosis and treatment of neurologic, oncologic, cardiovascular, and other disorders. The authors propose a close proximity hybrid system design in which a C-arm fluoroscopy unit is placed immediately adjacent to the solenoid magnet of a MR system with a minimum distance of 1.2 m between the x-ray and MR imaging fields of view. Existing rotating anode x-ray tube designs fail within MR fringe field environments because the magnetic fields alter the electron trajectories in the x-ray tube and act as a brake on the induction motor, reducing the rotation speed of the anode. In this study the authors propose a novel motor design that avoids the anode rotation speed reduction. Methods: The proposed design replaces the permanent magnet stator found in brushed dc motors with the radial component of the MR fringe field. The x-ray tube is oriented such that the radial component of the MR fringe field is orthogonal to the cathode-anode axis. Using a feedback position sensor and the support bearings as electrical slip rings, the authors use electrical commutation to eliminate the need for mechanical brushes and commutators. A vacuum compatible prototype of the proposed motor design was assembled, and its performance was evaluated at various operating conditions. The prototype consisted of a 3.1 in. diameter anode rated at 300 kHU with a ceramic rotor that was 5.6 in. in length and had a 2.9 in. diameter. The material chosen for all ceramic components was MACOR, a machineable glass ceramic developed by Corning Inc. The approximate weight of the entire assembly was 1750 g. The maximum rotation speed, angular acceleration, and acceleration time of the motor design were investigated, as well as the dependence of these parameters on rotor angular offset, magnetic field strength, and field orientation. The resonance properties of the authors' assembly were also evaluated to determine its stability during acceleration, and a pulse width modulation algorithm was implemented to control the rotation speed of the motor. Results: At a magnetic flux density of 41 mT orthogonal to the axis of rotation (on the lower end of the expected flux density in the MR suite) the maximum speed of the motor was found to be 5150 revolutions per minute (rpm). The acceleration time necessary to reach 3000 rpm was found to be approximately 10 s at 59 mT. The resonance frequency of the assembly with the anode attached was 1310 rpm (21.8 Hz) which is far below the desired operating speeds. Pulse width modulation provides an effective method to control the speed of the motor with a resolution of 100 rpm. Conclusions: The proposed design can serve as a direct replacement to the conventional induction motor used in rotating anode x-ray tubes. It does not suffer from a reduced rotation speed when operating in a MR environment. The presence of chromic steel bearings in the prototype prevented testing at the higher field strengths, and future iterations of the design could eliminate this shortcoming. The prototype assembly demonstrates proof of concept of the authors' design and overcomes one of the major obstacles for a MR compatible rotating anode x-ray tube.

Lillaney, Prasheel; Pelc, Norbert [Department of Radiology, Stanford University, Stanford, California 94305 and Department of Bioengineering, Stanford University, Stanford, California 94305 (United States); Shin Mihye [Department of Radiology, Stanford University, Stanford, California 94305 and Department of Mechanical Engineering, Stanford University, Stanford, California 94305 (United States); Hinshaw, Waldo; Fahrig, Rebecca [Department of Radiology, Stanford University, Stanford, California 94305 (United States); Bennett, N. Robert [Department of Radiology, Stanford University, Stanford, California 94305 and Qualcomm MEMS Technologies, San Jose, California 95134 (United States)

2013-02-15T23:59:59.000Z

253

Separation of magnetic field lines  

SciTech Connect

The field lines of magnetic fields that depend on three spatial coordinates are shown to have a fundamentally different behavior from those that depend on two coordinates. Unlike two-coordinate cases, a flux tube in a magnetic field that depends on all three spatial coordinates that has a circular cross section at one location along the tube characteristically has a highly distorted cross section at other locations. In an ideal evolution of a magnetic field, the current densities typically increase. Crudely stated, if the current densities increase by a factor {sigma}, the ratio of the long to the short distance across a cross section of a flux tube characteristically increases by e{sup 2{sigma}}, and the ratio of the longer distance to the initial radius increases as e{sup {sigma}}. Electron inertia prevents a plasma from isolating two magnetic field structures on a distance scale shorter than c/{omega}{sub pe}, which is about 10 cm in the solar corona, and reconnection must be triggered if {sigma} becomes sufficiently large. The radius of the sun, R{sub Circled-Dot-Operator }=7 Multiplication-Sign 10{sup 10}cm is about e{sup 23} times larger, so when {sigma} Greater-Than-Or-Equivalent-To 23, two lines separated by c/{omega}{sub pe} at one location can be separated by the full scale of any magnetic structures in the corona at another. The conditions for achieving a large exponentiation, {sigma}, are derived, and the importance of exponentiation is discussed.

Boozer, Allen H. [Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027 (United States)

2012-11-15T23:59:59.000Z

254

Optimal Real-time Dispatch for Integrated Energy Systems  

E-Print Network (OSTI)

to a 1 MW (300 ton) absorption chiller. The chiller offsetsThe generator and absorption chiller are not run, showingwill be useful to the absorption chiller and space-heating.

Firestone, Ryan Michael

2007-01-01T23:59:59.000Z

255

Diamond fiber field emitters  

DOE Patents (OSTI)

A field emission electron emitter comprising an electrode formed of at least one diamond, diamond-like carbon or glassy carbon composite fiber, said composite fiber having a non-diamond core and a diamond, diamond-like carbon or glassy carbon coating on said non-diamond core, and electronic devices employing such a field emission electron emitter.

Blanchet-Fincher, Graciela B. (Wilmington, DE); Coates, Don M. (Santa Fe, NM); Devlin, David J. (Los Alamos, NM); Eaton, David F. (Wilmington, DE); Silzars, Aris K. (Landenburg, PA); Valone, Steven M. (Santa Fe, NM)

1996-01-01T23:59:59.000Z

256

Field verification of CO{sub 2} Foam. Final report  

Science Conference Proceedings (OSTI)

The East Vacuum Grayburg/San Andres Unit (EVGSAU), operated by Phillips Petroleum Company, was the site selected for a comprehensive evaluation of the use of foam for improving the effectiveness of a CO{sub 2} flood. This project, entitled {open_quotes}Field Verification of CO{sub 2-}Foam,{close_quotes} was jointly funded by the EVGSAU working interest owners, the U.S. Department of Energy (DOE), and the State of New Mexico. The DOE provided $2 million or approximately 34% of the total project costs, the EVGSAU provided $2.46 million, the State of New Mexico contributed approximately $1.2 million, and about $103,000 of other industrial funds were used. The Petroleum Recovery Research Center (PRRC), a division of the New Mexico Institute of Mining and Technology, provided laboratory and research support for the project. A joint project advisory team composed of technical representatives from several major oil companies provided input, review, and guidance for the project. The project, which began in 1989, had a scheduled duration of four years, but the DOE granted a no-cost extension to the end of March 1995 for the purpose of continued project evaluation. A field test of the CO{sub 2}-foam has been successfully conducted, and preliminary results are promising. Response in the foam injection well has been as anticipated, and an offset producing well experienced a positive oil response as a result of the foam test. Based on the favorable results observed in the foam injection test, a second foam test was conducted. The monitoring program included analysis of injectivity data, pressure falloff tests, observation well logs, interwell tracer response, production logs, history of production rates, and changes in gas-oil ratio. This report presents an overview of the project and provides results of the laboratory work, simulation studies, and field tests.

Martin, F.D.; Heller, J.P.; Weiss, W.W. [and others

1996-02-01T23:59:59.000Z

257

Field verification of CO{sub 2} foam. Final report  

Science Conference Proceedings (OSTI)

The East Vacuum Grayburg/San Andres Unit (EVGSAU), operated by Phillips Petroleum Company, was the site selected for a comprehensive evaluation of the use of foam for improving the effectiveness of a CO{sub 2} flood. This project, entitled ``Field Verification of CO{sub 2}-Foam,`` was jointly funded by the EVGSAU working interest owners, the US Department of Energy (DOE), and the State of New Mexico. The DOE provided $2 million or approximately 34% of the total project costs, the EVGSAU provided $2.46 million, the State of New Mexico contributed approximately $1.2 million, and about $103,000 of other industrial funds were used. The Petroleum Recovery Research Center (PRRC), a division of the New Mexico Institute of Mining and Technology, provided laboratory and research support for the project. A joint project advisory team composed of technical representatives from several major oil companies provided input, review, and guidance for the project. The project, which began in 1989, had a scheduled duration of four years, but the DOE granted a no-cost extension to the end of March 1995 for the purpose of continued project evaluation. A field test of the CO{sub 2}-foam has been successfully conducted, and preliminary results are promising. Response in the foam injection well has been as anticipated, and an offset producing well experienced a positive oil response as a result of the foam test. Based on the favorable results observed in the foam injection test, a second foam test was conducted. The monitoring program included analysis of injectivity data, pressure falloff tests, observation well logs, interwell tracer response, production logs, history of production rates, and changes in gas-oil ratio. This report presents an overview of the project and provides results of the laboratory work, simulation studies, and field tests.

Martin, F.D.; Heller, J.P.; Weiss, W.W. [and others

1995-06-01T23:59:59.000Z

258

Managing time, part 2  

Science Conference Proceedings (OSTI)

Masterful time management means not just tracking of messages in your personal environment, but managing your coordination network with others.

Peter J. Denning; Ritu Raj

2011-09-01T23:59:59.000Z

259

FREQUENCY AND TIME  

Science Conference Proceedings (OSTI)

... STRATWARM observed and FLARES expected ... observed and PROTON FLARE expected (- - ) STRATWARM ... time of observed solar or geophysical ...

2003-01-30T23:59:59.000Z

260

QuickTime VR  

Science Conference Proceedings (OSTI)

QuickTime VR. Christine Piatko and Sandy Ressler. ... Sandy Ressler's Office. Plant Floor of Black & Decker in Fayetteville NC. ...

Note: This page contains sample records for the topic "field time offset" 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

Principles of Arrangement Field Theory  

E-Print Network (OSTI)

In this paper I attempt to summarize the fundamental principles which underlie to Arrangement Field Theory. In my intention the exposition would be the most possible intelligible and self-contained. However the exposed concepts are revisited in the light of the new researches, so that they could appear slightly different than in the previous works. Much emphasis is posed here to the power of theory to predict the number of fermionic families (flavours) and space-time dimensions. I also give a quick glance to the entanglement phenomenon and its interpretation as microscopic wormhole.

Diego Marin

2012-07-07T23:59:59.000Z

262

Field Test Best Practices (FTBP) Update  

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

Field Test Best Practices (FTBP) Update: Field Test Best Practices (FTBP) Update: It's here! And we need you! Lieko Earle Dane Christensen Bethany Sparn Building America Stakeholder Meeting 2012-03-02 NATIONAL RENEWABLE ENERGY LABORATORY Identified Field Testing Needs 2 * Difficult to find good general guidelines * Difficult to find examples of good field test plans * Difficult to find information on instrumentation options * No easily-accessible central repository for best practices knowledge * Field tests were taking longer and costing more $$ than initially estimated * We keep reinventing the wheel * Start from scratch each time we write a data-logger program? * Repeat each other's mistakes? NATIONAL RENEWABLE ENERGY LABORATORY What is the FTBP Resource?

263

Lifshitz field theories with SDiff symmetries  

E-Print Network (OSTI)

We consider Lifshitz field theories with a dynamical critical exponent z equal to the dimension of space d and with a large group of base space symmetries, concretely space coordinate transformations with unit determinant ("Special Diffeomorphisms"). The field configurations of the theories considered may have the topology of skyrmions, vortices or monopoles, although we focus our detailed investigations on skyrmions. The resulting Lifshitz field theories have a BPS bound and exact soliton solutions saturating the bound, as well as time-dependent topological Q-ball solutions. Finally, we investigate the U(1) gauged versions of the Lifshitz field theories coupled to a Chern-Simons gauge field, where the BPS bound and soliton solutions saturating the bound continue to exist.

Adam, C; Sanchez-Guillen, J; Wereszczynski, A

2012-01-01T23:59:59.000Z

264

Timed Property Sequence Chart  

Science Conference Proceedings (OSTI)

Property Sequence Chart (PSC) is a novel scenario-based notation, which has been recently proposed to represent temporal properties of concurrent systems. This language balances expressive power and simplicity of use. However, the current version of ... Keywords: Property Sequence Chart, Real-time specification patterns, Timed Property Sequence Chart, Timing properties

Pengcheng Zhang; Bixin Li; Lars Grunske

2010-03-01T23:59:59.000Z

265

Three approaches to classical thermal field theory  

SciTech Connect

Research Highlights: > Classical thermal field theory admits three equivalent path integral formulations. > Classical Feynman rules can be derived for all three formulations. > Quantum Feynman rules reduce to classical ones at high temperatures. > Classical Feynman rules become much simpler when superfields are introduced. - Abstract: In this paper we study three different functional approaches to classical thermal field theory, which turn out to be the classical counterparts of three well-known different formulations of quantum thermal field theory: the closed-time path (CTP) formalism, the thermofield dynamics (TFD) and the Matsubara approach.

Gozzi, E., E-mail: gozzi@ts.infn.it [Department of Physics, University of Trieste, Strada Costiera 11, Miramare - Grignano, 34151 Trieste (Italy); INFN, Sezione di Trieste (Italy); Penco, R., E-mail: rpenco@syr.edu [Department of Physics, Syracuse University, Syracuse, NY 13244-1130 (United States)

2011-04-15T23:59:59.000Z

266

Quantum Operation Time Reversal  

E-Print Network (OSTI)

The dynamics of an open quantum system can be described by a quantum operation, a linear, complete positive map of operators. Here, I exhibit a compact expression for the time reversal of a quantum operation, which is closely analogous to the time reversal of a classical Markov transition matrix. Since open quantum dynamics are stochastic, and not, in general, deterministic, the time reversal is not, in general, an inversion of the dynamics. Rather, the system relaxes towards equilibrium in both the forward and reverse time directions. The probability of a quantum trajectory and the conjugate, time reversed trajectory are related by the heat exchanged with the environment.

Crooks, Gavin E

2007-01-01T23:59:59.000Z

267

Quantum Operation Time Reversal  

E-Print Network (OSTI)

The dynamics of an open quantum system can be described by a quantum operation, a linear, complete positive map of operators. Here, I exhibit a compact expression for the time reversal of a quantum operation, which is closely analogous to the time reversal of a classical Markov transition matrix. Since open quantum dynamics are stochastic, and not, in general, deterministic, the time reversal is not, in general, an inversion of the dynamics. Rather, the system relaxes towards equilibrium in both the forward and reverse time directions. The probability of a quantum trajectory and the conjugate, time reversed trajectory are related by the heat exchanged with the environment.

Gavin E. Crooks

2007-06-26T23:59:59.000Z

268

Abandoned oil fields in Oklahoma  

SciTech Connect

Data are presented for approximately 165 abandoned oil fields in Oklahoma that have produced 10,000 or more barrels of oil prior to abandonment. The following information is provided for each field: county; DOE field code; field name; AAPG geologic province code; discovery date of field; year of last production, if known; discovery well operator; proven acreage; formation thickness; depth of field; gravity of oil production; calendar year; yearly field oil production; yearly field gas production; cumulative oil production; cumulative gas production; number abandoned fields in county; cumulative production of oil from fields; and cumulative production of gas from fields. (ATT)

Chism, J.

1983-08-01T23:59:59.000Z

269

Light clocks in strong gravitational fields  

E-Print Network (OSTI)

We argue that the time measured by a light clock operating with photons rather than classical light requires a refinement of the standard clock postulate in general relativity. In the presence of a gravitational field, already the one-loop quantum corrections to classical Maxwell theory affect light propagation and the construction of observers' frames of reference. Carefully taking into account these kinematic effects, a concise geometric expression for the time shown by a light clock is obtained. This result has far-reaching implications for physics in strong gravitational fields.

Raffaele Punzi; Frederic P. Schuller; Mattias N. R. Wohlfarth

2009-02-11T23:59:59.000Z

270

Light clocks in strong gravitational fields  

E-Print Network (OSTI)

We argue that the time measured by a light clock operating with photons rather than classical light requires a refinement of the standard clock postulate in general relativity. In the presence of a gravitational field, already the one-loop quantum corrections to classical Maxwell theory affect light propagation and the construction of observers' frames of reference. Carefully taking into account these kinematic effects, a concise geometric expression for the time shown by a light clock is obtained. This result has far-reaching implications for physics in strong gravitational fields.

Punzi, Raffaele; Wohlfarth, Mattias N R

2009-01-01T23:59:59.000Z

271

THE GALACTIC MAGNETIC FIELD  

Science Conference Proceedings (OSTI)

With this Letter, we complete our model of the Galactic magnetic field (GMF), by using the WMAP7 22 GHz total synchrotron intensity map and our earlier results to obtain a 13-parameter model of the Galactic random field, and to determine the strength of the striated random field. In combination with our 22-parameter description of the regular GMF, we obtain a very good fit to more than 40,000 extragalactic Faraday rotation measures and the WMAP7 22 GHz polarized and total intensity synchrotron emission maps. The data call for a striated component to the random field whose orientation is aligned with the regular field, having zero mean and rms strength Almost-Equal-To 20% larger than the regular field. A noteworthy feature of the new model is that the regular field has a significant out-of-plane component, which had not been considered earlier. The new GMF model gives a much better description of the totality of data than previous models in the literature.

Jansson, Ronnie; Farrar, Glennys R. [Center for Cosmology and Particle Physics, Department of Physics, New York University, New York, NY 10003 (United States)

2012-12-10T23:59:59.000Z

272

Automated Critical Peak Pricing Field Tests: Program Description and Results  

E-Print Network (OSTI)

Usage: The total effective energy charge for usage duringUsage: The total effective energy charge for usage duringtotal effective TOU energy rates through offsetting summer on-peak and part-peak rate credits for usage

Piette, Mary Ann; Watson, David; Motegi, Naoya; Kiliccote, Sila; Xu, Peng

2006-01-01T23:59:59.000Z

273

Remnant field detector  

DOE Patents (OSTI)

An apparatus for qualitatively detecting remnant magnetic fields in matched pairs of magnet cores is described. Equal magnitude and oppositely oriented magnetic flux is induced in the magnet cores by oppositely wound primary windings and current source. Identically wound secondary windings generate output voltages in response to the induced flux. The output voltages generated should be of equal magnitude and opposite polarity if there is no remnant field in the cores. The output voltage will be unequal which is detected if either core has a remnant field. 1 fig.

Visser, A.T.

1986-11-24T23:59:59.000Z

274

Remnant field detector  

DOE Patents (OSTI)

A method apparatus for qualitatively detecting remnant magnetic fields in matched pairs of magnet cores. Equal magnitude and oppositely oriented magnetic flux is induced in the magnet cores by oppositely wound primary windings and current source. Identically wound secondary windings generate output voltages in response to the induced flux. The output voltages generated should be of equal magnitude and opposite polarity if there is no remnant field in the cores. The output voltages will be unequal which is detected if either core has a remnant field.

Visser, Age T. (Geneva, IL)

1988-01-01T23:59:59.000Z

275

Analysis Driven Field Testing  

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

ANALYSIS DRIVEN FIELD TESTING ANALYSIS DRIVEN FIELD TESTING Greg Barker, MEP Paul Norton, NERD C.E. Hancock, MEP Building America Residential Energy Efficiency Stakeholder Meeting Austin, TX March 2, 2012 MODELING DRIVEN FIELD TESTING Greg Barker, MEP Paul Norton, NERD C.E. Hancock, MEP Building America Residential Energy Efficiency Stakeholder Meeting Austin, TX March 2, 2012 MODELING DRIVEN MEASUREMENTS Greg Barker, MEP Paul Norton, NERD C.E. Hancock, MEP Building America Residential Energy Efficiency Stakeholder Meeting Austin, TX March 2, 2012 Building America Residential Energy Efficiency Stakeholder Meeting Austin, TX March 2, 2012 "Modeling without measuring lacks credibility. Measuring without modeling lacks generality." Ed Hancock

276

On the Time Times Temperature Bound  

E-Print Network (OSTI)

Recently Hod proposes a lower bound on the relaxation time of a perturbed thermodynamic system. For gravitational systems this bound transforms into a condition on the fundamental quasinormal frequency. We test the bound in some spacetimes whose quasinormal frequencies are calculated exactly, as the three-dimensional BTZ black hole, the D-dimensional de Sitter spacetime, and the D-dimensional Nariai spacetime. We find that for some of these spacetimes their fundamental quasinormal frequencies do not satisfy the bound proposed by Hod.

A. Lopez-Ortega

2010-06-28T23:59:59.000Z

277

Forests to offset the greenhouse effect  

SciTech Connect

This article discusses the role of trees in the prevention of global warming. If forest plantations are used as carbon sinks, it is estimated that 500 million hectares of intensively managed, rapidly growing plantation forests could sequester all of the 5 billion tons or so of carbon released annually through the burning of fossil fuels and deforestation. Land area requirements would be large enough to dwarf all previous forest plantation efforts. The cost would bean average of $400 per hectare to establish such plantations in the United States.

Sedjo, R.A. (Resources for the Future, Washington, DC (USA))

1989-07-01T23:59:59.000Z

278

OVERVIEW OF EVOLVING FINANCIAL AND OFFSETS  

E-Print Network (OSTI)

demands · RE (Renewable Energy Directive) · Incentives and barriers for mitigating initiatives on waste) · By investments in mitigating activities in other countries (Joint Implementation or Clean Development Mechanism to COP-15 CDM: CLEAN DEVELOPMENT MECHANISM Industries or states under reduction obligations invest

Columbia University

279

Green Power Network: Greenhouse Gas (GHG) Offsets  

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

projects include renewable electricity generation, energy efficiency measures, methane capture at landfill sites, soil carbon sequestration, and reforestation projects....

280

Explaining the Price of Voluntary Carbon Offsets  

E-Print Network (OSTI)

prices. In both specifications, statisti- cally significant coefficients are those on the project types of biomass

Conte, Marc N.; Kotchen, Matthew

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "field time offset" 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

Mesoscale Time and Space Wind Variability  

Science Conference Proceedings (OSTI)

The results of a program to study the time and space variability of the wind field below 5 km are presented. Wind data were collected using pilot balloons tracked with the METRAC positioning system. Balloons were launched at 10-30 min intervals ...

W. H. Jasperson

1982-06-01T23:59:59.000Z

282

Space, time and nesting Integrated Assessment Models  

Science Conference Proceedings (OSTI)

Integrated Assessment Modelling in the field of air pollution has advanced greatly since the 1985 Helsinki Protocol on the reduction of Sulphur emissions and their transboundary fluxes. With subsequent protocols and increased understanding of the inter-relationships ... Keywords: CLRTAP, Integrated Assessment Modelling, Scale, Science-policy interaction, Space, Time

T. Oxley; H. M. ApSimon

2007-12-01T23:59:59.000Z

283

Field Operations Program  

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

SUMMARY This report summarizes the Accelerated Reliability testing of five lead-acid battery- equipped Chevrolet S-10 electric vehicles by the U.S. Department of Energy's Field...

284

Fields in Circle  

Science Conference Proceedings (OSTI)

... Field circled in red shown to the right. ... roughly to the blue circle in the tool on the left. ... Spreadsheet Tool, open a spreadsheet as a tab-delimited text ...

285

What Time is It?  

Science Conference Proceedings (OSTI)

... These are sometimes marketed as "atomic clocks", but ... problems include incorrectly setting your local time zone on the clock, batteries that need ...

2011-01-19T23:59:59.000Z

286

Dangerous electromagnetic fields?  

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

Dangerous electromagnetic fields? Dangerous electromagnetic fields? Name: Tommy T Joseph Location: N/A Country: N/A Date: N/A Question: Why are electromagnetic fields supposedly dangerous? Replies: I assume you are asking about power line frequency (60 Hz) fields, since they have been in the news lately. No one knows for sure that they are dangerous. There have been a few studies which seem to show an association between how close homes are to power lines, and the incidence of childhood cancer (mostly leukemia) in children living (or who have lived) in those homes. Other similar studies have not found such an association. In all the studies which have found an association, none has actually measured the fields. Studies which actually have measured the fields find no association. There is no known mechanism for 60 Hz fields to cause cancer. Furthermore, the classic "dose-response relationship," that is, the greater the dose, the greater the response, does not seem to work here. Many laboratory studies have found that 60 Hz fields have an effect on organisms under certain conditions, but none of the observed effects can be convincingly related to a hazard. The bottom line is, no one knows for sure. It is important to realize that it is impossible to prove that anything is completely safe. My personal opinion is that, if there is a risk, it must be very small, or it wouldn't be so hard to prove. I can supply some good unbiased references if you are interested.

287

Radiation Field Control Manual  

Science Conference Proceedings (OSTI)

The EPRI Radiation Management Program is dedicated to reducing nuclear power plant worker personnel exposure by developing practices and technologies to increase the radiation protection of the worker, and to implement methods to reduce radiation fields. The nuclear power industry has recently implemented the RP2020 Initiative to promote positive radiation protection trends. Control of radiation fields is crucial to one of the initiative goals of reducing exposure. This manual provides the current state ...

2004-12-16T23:59:59.000Z

288

ClassSTRONG: Classical simulations of Strong Field processes  

E-Print Network (OSTI)

A set of Mathematica functions is presented to model classically two of the most important processes in strong field physics, namely high-order harmonic generation (HHG) and above-threshold ionization (ATI). Our approach is based on the numerical solution of the Newton-Lorentz equation of an electron moving on an electric field and takes advantage of the symbolic languages features and graphical power of Mathematica. Similarly as in the Strong Field Approximation (SFA), the effects of atomic potential on the motion of electron in the laser field are neglected. The SFA has proven to be an essential tool in strong field physics in the sense that it is able to predict with great precision the harmonic (in the HHG) and energy (in the ATI) limits. We have extended substantially the conventional classical simulations, where the electric field is only dependent on time, including spatial nonhomogeneous fields and spatial and temporal synthesized fields. Spatial nonhomogeneous fields appear when metal nanosystems int...

Ciappina, M F; Lewenstein, M

2013-01-01T23:59:59.000Z

289

DARK-FIELD ILLUMINATION SYSTEM  

DOE Patents (OSTI)

A means was developed for viewing objects against a dark background from a viewing point close to the light which illuminates the objects and under conditions where the back scattering of light by the objects is minimal. A broad light retro-directing member on the opposite side of the objects from the light returns direct light back towards the source while directing other light away from the viewing point. The viewing point is offset from the light and thus receives only light which is forwardly scattered by an object while returning towards the source. The object is seen, at its true location, against a dark background. The invention is particularly adapted for illuminating and viewing nuclear particle tracks in a liquid hydrogen bubble chamber through a single chamber window. (AEC)

Norgren, D.U.

1962-07-24T23:59:59.000Z

290

Nuclear dynamics in time-dependent picture  

E-Print Network (OSTI)

Using the time-dependent theory of quantum mechanics, we investigate nuclear electric dipole responses. The time evolution of a wave function is explicitly calculated in the coordinate-space representation. The particle continuum is treated with the absorbing boundary condition. Calculated time-dependent quantities are transformed into those of familiar energy representation. We apply the method to a three-body model for 11Li and to the mean-field model for 22O, then discuss properties of E1 response.

Takashi Nakatsukasa; Makoto Ito; Kazuhiro Yabana

2006-10-19T23:59:59.000Z

291

TIME CALIBRATED OSCILLOSCOPE SWEEP  

DOE Patents (OSTI)

The time calibrator of an electric signal displayed on an oscilloscope is described. In contrast to the conventional technique of using time-calibrated divisions on the face of the oscilloscope, this invention provides means for directly superimposing equal time spaced markers upon a signal displayed upon an oscilloscope. More explicitly, the present invention includes generally a generator for developing a linear saw-tooth voltage and a circuit for combining a high-frequency sinusoidal voltage of a suitable amplitude and frequency with the saw-tooth voltage to produce a resultant sweep deflection voltage having a wave shape which is substantially linear with respect to time between equal time spaced incremental plateau regions occurring once each cycle of the sinusoidal voltage. The foregoing sweep voltage when applied to the horizontal deflection plates in combination with a signal to be observed applied to the vertical deflection plates of a cathode ray oscilloscope produces an image on the viewing screen which is essentially a display of the signal to be observed with respect to time. Intensified spots, or certain other conspicuous indications corresponding to the equal time spaced plateau regions of said sweep voltage, appear superimposed upon said displayed signal, which indications are therefore suitable for direct time calibration purposes.

Owren, H.M.; Johnson, B.M.; Smith, V.L.

1958-04-22T23:59:59.000Z

292

Semantics, experience and time  

Science Conference Proceedings (OSTI)

The computational hypothesis, with its inherent representationalism, and the dynamical hypothesis, with its apparent absence of representations and its commitment to continuous time, stand at an impasse. It is unclear how the dynamical stance can handle ... Keywords: Computation, Experience, Invariance, Semantics, Situatedness, Time

Stephen E. Robbins

2002-09-01T23:59:59.000Z

293

Real-time shading  

Science Conference Proceedings (OSTI)

Real-time procedural shading was once seen as a distant dream. When the first version of this course was offered four years ago, real-time shading was possible, but only with one-of-a-kind hardware or by combining the effects of tens to hundreds of rendering ...

Marc Olano; Kurt Akeley; John C. Hart; Wolfgang Heidrich; Michael McCool; Jason L. Mitchell; Randi Rost

2004-08-01T23:59:59.000Z

294

TIMING OF SHOCK WAVES  

DOE Patents (OSTI)

This patent relates to means for ascertaining the instant of arrival of a shock wave in an exploslve charge and apparatus utilizing this means to coordinate the timing of two operations involving a short lnterval of time. A pair of spaced electrodes are inserted along the line of an explosive train with a voltage applied there-across which is insufficient to cause discharge. When it is desired to initiate operation of a device at the time the explosive shock wave reaches a particular point on the explosive line, the device having an inherent time delay, the electrodes are located ahead of the point such that the ionization of the area between the electrodes caused by the traveling explosive shock wave sends a signal to initiate operation of the device to cause it to operate at the proper time. The operated device may be photographic equipment consisting of an x-ray illuminating tube.

Tuck, J.L.

1955-03-01T23:59:59.000Z

295

LIDAR wind speed measurements of evolving wind fields  

E-Print Network (OSTI)

Light Detection and Ranging (LIDAR) systems are able to measure the speed of incoming wind before it interacts with a wind turbine rotor. These preview wind measurements can be used in feedforward control systems designed to reduce turbine loads. However, the degree to which such preview-based control techniques can reduce loads by reacting to turbulence depends on how accurately the incoming wind field can be measured. Past studies have assumed Taylor’s frozen turbulence hypothesis, which implies that turbulence remains unchanged as it advects downwind at the mean wind speed. With Taylor’s hypothesis applied, the only source of wind speed measurement error is distortion caused by the LIDAR. This study introduces wind evolution, characterized by the longitudinal coherence of the wind, to LIDAR measurement simulations to create a more realistic measurement model. A simple model of wind evolution is applied to a frozen wind field used in previous studies to investigate the effects of varying the intensity of wind evolution. Simulation results show the combined effects of LIDAR errors and wind evolution for realistic turbine-mounted LIDAR measurement scenarios. Nomenclature a decay parameter for exponential coherence al decrement parameter for transverse coherence (l ? {u, v, w}) bl offset parameter for transverse coherence (l ? {u, v, w}) D longitudinal distance between two points or measurement preview distance F focal distance f frequency (Hz) ? LIDAR measurement angle off of longitudinal direction k wind velocity wavenumber (m?1) ? wavelength (m) R range along LIDAR beam r scan radius for spinning LIDAR scenario ri,j distance between two points in the yz plane U mean wind speed (m/s) ?i,j average mean wind speed between two points in the yz plane ? azimuth angle in the rotor plane ?2 xy(f) Coherence between signals x and y

Eric Simley; Lucy Y. Pao; Neil Kelley; Bonnie Jonkman; Rod Frehlich

2012-01-01T23:59:59.000Z

296

High-speed real-time multi-rate simulation  

Science Conference Proceedings (OSTI)

Recent research has focused on developing techniques that use digital signal processors (DSPs) and field-programmable gate arrays (FPGAs) to support real-time simulation with frame times of a few microseconds or less. These techniques can be used ... Keywords: FPGA, distributed, high-speed, multi-rate, real-time

Roy Crosbie; Dale Word; John Zenor; Richard Bednar; Wilfred Ghonsalves; Narain Hingorani

2009-07-01T23:59:59.000Z

297

Methane Emissions from Rice Fields - Final Report  

SciTech Connect

Methane (Ch4) is a greenhouse gas regarded second only to carbon dioxide in its ability to cause global warming. Methane is important because of its relatively fast increase, and also because it is, per molecule, some 60 times more effective than carbon dioxide in causing global warming. The largest present anthropogenic sources of methane are rice fields, cattle and biomass burning.

Khalil, M. Aslam; Rasmussen,Reinhold A.

2002-12-03T23:59:59.000Z

298

Hard thermal loops in static external fields  

E-Print Network (OSTI)

We study, in the imaginary-time formalism, the high temperature behavior of n-point thermal loops in static Yang-Mills and gravitational fields. We show that in this regime, any hard thermal loop gives the same leading contribution as the one obtained by evaluating the loop at zero external energies and momenta.

Frenkel, J; Takahashi, N

2009-01-01T23:59:59.000Z

299

Hard thermal loops in static background fields  

E-Print Network (OSTI)

We discuss the high temperature behavior of retarded thermal loops in static external fields. We employ an analytic continuation of the imaginary time formalism and use a spectral representation of the thermal amplitudes. We show that, to all orders, the leading contributions of static hard thermal loops can be directly obtained by evaluating them at zero external energies and momenta.

Brandt, F T; Siqueira, J B

2013-01-01T23:59:59.000Z

300

Speech recognition using augmented conditional random fields  

Science Conference Proceedings (OSTI)

Acoustic modeling based on hidden Markov models (HMMs) is employed by state-of-the-art stochastic speech recognition systems. Although HMMs are a natural choice to warp the time axis and model the temporal phenomena in the speech signal, their conditional ... Keywords: augmented conditional random fields (ACRFs), augmented spaces, discriminative compression, hidden Markov models (HMMs)

Yasser Hifny; Steve Renals

2009-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "field time offset" 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

Digital time delay  

DOE Patents (OSTI)

Method and apparatus are provided for generating an output pulse following a trigger pulse at a time delay interval preset with a resolution which is high relative to a low resolution available from supplied clock pulses. A first lumped constant delay provides a first output signal at predetermined interpolation intervals corresponding to the desired high resolution time interval. Latching circuits latch the high resolution data to form a first synchronizing data set. A selected time interval has been preset to internal counters and corrected for circuit propagation delay times having the same order of magnitude as the desired high resolution. Internal system clock pulses count down the counters to generate an internal pulse delayed by an internal which is functionally related to the preset time interval. A second LCD corrects the internal signal with the high resolution time delay. A second internal pulse is then applied to a third LCD to generate a second set of synchronizing data which is complementary with the first set of synchronizing data for presentation to logic circuits. The logic circuits further delay the internal output signal with the internal pulses. The final delayed output signal thereafter enables the output pulse generator to produce the desired output pulse at the preset time delay interval following input of the trigger pulse.

Martin, A.D.

1986-05-09T23:59:59.000Z

302

Environment Induced Time Arrow  

E-Print Network (OSTI)

The spread of the time arrows from the environment to an observed subsystem is followed within a harmonic model. A similarity is pointed out between irreversibility and a phase with spontaneously broken symmetry. The causal structure of interaction might be lost in the irreversible case, as well. The Closed Time Path formalism is developed for classical systems and shown to handle the time arrow problem in a clear and flexible manner. The quantum case is considered, as well, and the common origin of irreversibility and decoherence is pointed out.

Janos Polonyi

2012-06-25T23:59:59.000Z

303

VARIABLE TIME DELAY MEANS  

DOE Patents (OSTI)

An electrically variable time delay line is described which may be readily controlled simuitaneously with variable impedance matching means coupied thereto such that reflections are prevented. Broadly, the delay line includes a signal winding about a magnetic core whose permeability is electrically variable. Inasmuch as the inductance of the line varies directly with the permeability, the time delay and characteristic impedance of the line both vary as the square root of the permeability. Consequently, impedance matching means may be varied similariy and simultaneously w:th the electrically variable permeability to match the line impedance over the entire range of time delay whereby reflections are prevented.

Clemensen, R.E.

1959-11-01T23:59:59.000Z

304

Pulsed hybrid field emitter  

DOE Patents (OSTI)

A hybrid emitter exploits the electric field created by a rapidly depoled ferroelectric material. Combining the emission properties of a planar thin film diamond emitter with a ferroelectric alleviates the present technological problems associated with both types of emitters and provides a robust, extremely long life, high current density cathode of the type required by emerging microwave power generation, accelerator technology and display applications. This new hybrid emitter is easy to fabricate and not susceptible to the same failures which plague microstructure field emitter technology. Local electrode geometries and electric field are determined independently from those for optimum transport and brightness preservation. Due to the large amount of surface charge created on the ferroelectric, the emitted electrons have significant energy, thus eliminating the requirement for specialized phosphors in emissive flat-panel displays. 11 figs.

Sampayan, S.E.

1998-03-03T23:59:59.000Z

305

Field Operations Program  

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

688 688 May 1999 Field Operations Program Activities Status Report Fiscal Years 1997 through mid-1999 J. E. Francfort D. V. O'Hara L. A. Slezak DOE/ID-10688 Field Operations Program Activities Status Report Fiscal Years 1997 through mid-1999 J. E. Francfort 1 D. V. O'Hara 2 L. A. Slezak 2 Published May 1999 Idaho National Engineering and Environmental Laboratory Automotive Systems and Technology Department Lockheed Martin Idaho Technologies Company Idaho Falls, Idaho 83415 Prepared for the U.S. Department of Energy Idaho Operations Office 1 INEEL/Lockheed Martin Idaho Technologies Co. 2 U.S. Department of Energy iii EXECUTIVE SUMMARY The Field Operations Program is an electric vehicle testing and evaluation program sponsored by U.S. Department of Energy and managed by the Idaho National Engineering and Environmental

306

Pulsed hybrid field emitter  

SciTech Connect

A hybrid emitter exploits the electric field created by a rapidly depoled ferroelectric material. Combining the emission properties of a planar thin film diamond emitter with a ferroelectric alleviates the present technological problems associated with both types of emitters and provides a robust, extremely long life, high current density cathode of the type required by emerging microwave power generation, accelerator technology and display applications. This new hybrid emitter is easy to fabricate and not susceptible to the same failures which plague microstructure field emitter technology. Local electrode geometries and electric field are determined independently from those for optimum transport and brightness preservation. Due to the large amount of surface charge created on the ferroelectric, the emitted electrons have significant energy, thus eliminating the requirement for specialized phosphors in emissive flat-panel displays.

Sampayan, Stephen E. (Manteca, CA)

1998-01-01T23:59:59.000Z

307

Decaying Higgs Fields and Cosmological Dark Energy  

E-Print Network (OSTI)

The observed dark energy in the universe might give particles inertial mass. We investigate one realization of this idea, that the dark energy field might be a decayed scalar component of a supermultiplet field in the early universe that creates inertial mass through spontaneous symmetry breaking, e.g. a Higgs field. To investigate this possibility, the cosmological Friedmann equation of energy balance is augmented in a standard way to incorporate a minimally coupled cosmological Higgs. For epochs where the expansion of the universe is driven by matter and radiation and not the scalar field, the observed hidden nature of the Higgs field can be codified into a single differential equation that we call the "hidden higgs" condition. The resulting differential equation is solved for the time dependant scalar field and a simple and interesting solution is found analytically. Such a Higgs field decays from Planck scale energies rapidly and approximately exponentially from onset, leaving only the initially negligible constant term of the potential as a final cosmological constant. Such evolution replaces the hierarchy problem with the problem of explaining why such evolution is physically justified.

Robert J. Nemiroff; Bijunath Patla

2004-09-27T23:59:59.000Z

308

Microbial field pilot study  

SciTech Connect

A multi-well microbially enhanced oil recovery field pilot has been performed in the Southeast Vassar Vertz Sand Unit in Payne County, Oklahoma. The primary emphasis of the experiment was preferential plugging of high permeability zones for the purpose of improving waterflood sweep efficiency. Studies were performed to determine reservoir chemistry, ecology, and indigenous bacteria populations. Growth experiments were used to select a nutrient system compatible with the reservoir that encouraged growth of a group of indigenous nitrate-using bacteria and inhibit growth of sulfate-reducing bacteria. A specific field pilot area behind an active line drive waterflood was selected. Surface facilities were designed and installed. Injection protocols of bulk nutrient materials were prepared to facilitate uniform distribution of nutrients within the pilot area. By the end of December, 1991, 82.5 tons (75.0 tonnes) of nutrients had been injected in the field. A tracer test identified significant heterogeneity in the SEVVSU and made it necessary to monitor additional production wells in the field. The tracer tests and changes in production behavior indicate the additional production wells monitored during the field trial were also affected. Eighty two and one half barrels (13.1 m[sup 3]) of tertiary oil have been recovered. Microbial activity has increased CO[sub 2] content as indicated by increased alkalinity. A temporary rise in sulfide concentration was experienced. These indicate an active microbial community was generated in the field by the nutrient injection. Pilot area interwell pressure interference test results showed that significant permeability reduction occurred. The interwell permeabilities in the pilot area between the injector and the three pilot production wells were made more uniform which indicates a successful preferential plugging enhanced oil recovery project.

Knapp, R.M.; McInerney, M.J.; Menzie, D.E.; Coates, J.D.; Chisholm, J.L.

1993-05-01T23:59:59.000Z

309

Field Mapping At Dixie Valley Geothermal Field Area (Wesnousky...  

Open Energy Info (EERE)

search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Field Mapping At Dixie Valley Geothermal Field Area (Wesnousky, Et Al., 2003) Exploration Activity Details...

310

Time, energy & form  

E-Print Network (OSTI)

Physical manifestations of time occur in natural forms of all sizes. Architectural form serves as shelter while providing a built envelope of human life, simultaneously influencing and influenced by energetic activities ...

McInnis, Martha Jane

1982-01-01T23:59:59.000Z

311

Dogs and Time  

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

Question: I travel often and worry how leaving for long periods of time (and boarding my dog) will affect her. I wouldn't think that dogs could understand the concept of...

312

Wood Use Across Time  

E-Print Network (OSTI)

?Forest products history and use ?Forest resource- the big picture ?Consumption- the big picture ?Trends forest products industry ? pulp & paper ? solid woodBack in Time ?1492 ? Columbus sailed the ocean blue! ? wood use- fuelwood American Indians ?1634: Jean Nicolet

Scott Bowe; United States Wood Use

2005-01-01T23:59:59.000Z

313

Technical Talks Timing  

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

Talks Timing The technical talks should last a maximum of 15 minutes with 5 minutes for set-up and 5 minutes for Q&A. No teamgroup presentations are allowed. The objective of...

314

The solar magnetic field  

E-Print Network (OSTI)

The magnetic field of the Sun is the underlying cause of the many diverse phenomena combined under the heading of solar activity. Here we describe the magnetic field as it threads its way from the bottom of the convection zone, where it is built up by the solar dynamo, to the solar surface, where it manifests itself in the form of sunspots and faculae, and beyond into the outer solar atmosphere and, finally, into the heliosphere. On the way it, transports energy from the surface and the subsurface layers into the solar corona, where it heats the gas and accelerates the solar wind.

Solanki, Sami K; Schüssler, Manfred; 10.1088/0034-4885/69/3/R02

2010-01-01T23:59:59.000Z

315

Particle acceleration by fluctuating electric fields at a magnetic field null point  

E-Print Network (OSTI)

Particle acceleration consequences from fluctuating electric fields superposed on an X-type magnetic field in collisionless solar plasma are studied. Such a system is chosen to mimic generic features of dynamic reconnection, or the reconnective dissipation of a linear disturbance. We explore numerically the consequences for charged particle distributions of fluctuating electric fields superposed on an X-type magnetic field. Particle distributions are obtained by numerically integrating individual charged particle orbits when a time varying electric field is superimposed on a static X-type neutral point. This configuration represents the effects of the passage of a generic MHD disturbance through such a system. Different frequencies of the electric field are used, representing different possible types of wave. The electric field reduces with increasing distance from the X-type neutral point as in linear dynamic magnetic reconnection. The resulting particle distributions have properties that depend on the amplitude and frequency of the electric field. In many cases a bimodal form is found. Depending on the timescale for variation of the electric field, electrons and ions may be accelerated to different degrees and often have energy distributions of different forms. Protons are accelerated to $\\gamma$-ray producing energies and electrons to and above hard X-ray producing energies in timescales of 1 second. The acceleration mechanism is possibly important for solar flares and solar noise storms but is also applicable to all collisionless plasmas.

P. Petkaki; A. L. MacKinnon

2007-07-09T23:59:59.000Z

316

Parallel Phase Field Method  

Science Conference Proceedings (OSTI)

... term goal is to perform simulations on grids of size ... n is the number of computational grid points along ... time on 24 200 MHz POWER 3 processors. ...

2011-01-19T23:59:59.000Z

317

Method of electric field flow fractionation wherein the polarity of the electric field is periodically reversed  

DOE Patents (OSTI)

A novel method of electric field flow fractionation for separating solute molecules from a carrier solution is disclosed. The method of the invention utilizes an electric field that is periodically reversed in polarity, in a time-dependent, wave-like manner. The parameters of the waveform, including amplitude, frequency and wave shape may be varied to optimize separation of solute species. The waveform may further include discontinuities to enhance separation.

Stevens, Fred J. (Naperville, IL)

1992-01-01T23:59:59.000Z

318

Spectral functions for composite fields and viscosity in hot scalar field theory  

E-Print Network (OSTI)

We derive a spectral representation for the two-point Green function for arbitrary composite field operators in Thermo Field Dynamics (TFD). A simple way for calculating the spectral density within TFD is pointed out and compared with known results from the imaginary time formalism. The method is applied to hot $\\phi^4$ theory. We give a compact derivation of the one-loop contribution to the shear viscosity and show that it is dominated by low-momentum plasmons.

Enke Wang; Xiaofei Zhang; Ulrich Heinz

1995-09-19T23:59:59.000Z

319

Corn Fields Shutting Down  

E-Print Network (OSTI)

Fields of corn around Indiana, especially early-planted ones, are in the process of shutting down for the season. While only 3 % of the state’s crop was estimated to be mature (i.e., kernel black layer) as of the week ending 31 Aug, 41 % of the crop was estimated to be at dent stage or beyond (Indiana Ag Stats Service, 2 Sep 2003). The onset of maturity is naturally accompanied by an eventual senescence of the entire solar harvesting “machinery”, but some fields appear to be shutting down prematurely and deserve to be monitored for potential stalk health issues prior to harvest (Nielsen, 2003). The short-term forecast for cool evening temperatures in the mid-50’s or lower throughout much of the state the remainder of this week will further accelerate premature senescence of these stressed fields. Plant stresses contributing to the premature “shutdown ” of some fields include: Root systems compromised by saturated soil conditions caused by early and midseason “monsoon ” events. Drier than normal conditions throughout much of August, accompanied by stressful low to mid-90 F temperatures in the latter part of the month.

R. L. (bob Nielsen

2003-01-01T23:59:59.000Z

320

Asymmetric error field interaction with rotating conducting walls  

Science Conference Proceedings (OSTI)

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

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

2012-07-15T23:59:59.000Z

Note: This page contains sample records for the topic "field time offset" 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

AC field exposure study: human exposure to 60-Hz electric fields  

SciTech Connect

The objective of this study was to develop a method of estimating human exposure to the 60 Hz electric fields created by transmission lines. The Activity Systems Model simulates human activities in a variety of situations where exposure to electric fields is possible. The model combines maps of electric fields, activity maps, and experimentally determined activity factors to provide histograms of time spent in electric fields of various strengths in the course of agricultural, recreational, and domestic activities. For corroboration, the study team measured actual human exposure at locations across the United States near transmission lines ranging in voltage from 115 to 1200 kV. The data were collected with a specially designed vest that measures exposure. These data demonstrate the accuracy of the exposure model presented in this report and revealed that most exposure time is spent in fields of magnitudes similar to many household situations. The report provides annual exposure estimates for human activities near transmission lines and in the home and compares them with exposure data from typical laboratory animal experiments. For one exposure index, the cumulative product of time and electric field, exposure during some of the laboratory animal experiments is two to four orders of magnitude greater than cumulative exposure for a human during one year of outdoor work on a farm crossed by a transmission line.

Silva, J.M.

1985-04-01T23:59:59.000Z

322

ARM - Field Campaign - PGS Validatation  

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

govCampaignsPGS Validatation govCampaignsPGS Validatation Related Campaigns Precision Gas Sampling (PGS) Validation Field Campaign 2008.01.01, Fischer, SGP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : PGS Validatation 2009.03.01 - 2010.02.28 Lead Scientist : Marc Fischer For data sets, see below. Description The focus of this project was the prediction of landscape-scale fluxes of CO2, water, and sensible heat that drive variations in carbon cycle and regional climate (e.g., cloud formation and precipitation). Variation in these fluxes, caused by land use, management, and changing climate, requires models that are parameterized and tested against measurements made in multiple land cover types and over seasonal to inter-annual time scales.

323

The incident at Stagg Field  

SciTech Connect

A brief history of the events leading up to the first controlled release of atomic energy under the abandoned West Stands of Scagg Field at the University of Chicago on December 2, 1942. This experiment was a milestone in a multifaceted project geared toward producing an atomic bomb in time to affect the outcome of World War II. This article traces the origins of the Manhattan Project from the first letter written by Einstein to the first successful graphite modulated chain reacting pile and including a brief afterward on the use of the bombs produced by this project on the cities of Hiroshima and Nagasaki. Other articles in this magazine also discuss various aspects of the project and serve, along with this article, as a commemoration of the 50th anniversary of the first controlled chain reaction.

Moore, M.

1992-12-01T23:59:59.000Z

324

High Field Phenomena of Qubits  

E-Print Network (OSTI)

Electron and nuclear spins are very promising candidates to serve as quantum bits (qubits) for proposed quantum computers, as the spin degrees of freedom are relatively isolated from their surroundings, and can be coherently manipulated e.g. through pulsed EPR and NMR. For solid state spin systems, impurities in crystals based on carbon and silicon in various forms have been suggested as qubits, and very long relaxation rates have been observed in such systems. We have investigated a variety of these systems at high magnetic fields in our multi-frequency pulsed EPR/ENDOR spectrometer. A high magnetic field leads to large electron spin polarizations at helium temperatures giving rise to various phenomena that are of interest with respect to quantum computing. For example, it allows the initialization of the both the electron spin as well as hyperfine-coupled nuclear spins in a well defined state by combining millimeter and RF radiation; it can increase the T2 relaxation times by eliminating decoherence due to dipolar interaction; and it can lead to new mechanisms for the coherent electrical readout of electron spins. We will show some examples of these and other effects in Si:P, SiC:N, and nitrogen-related centers in diamond.

J. van Tol; G. W. Morley; S. Takahashi; D. R. McCamey; C. Boehme; M. E. Zvanut

2009-06-11T23:59:59.000Z

325

Detecting Climate Signals Using Space–Time EOFs  

Science Conference Proceedings (OSTI)

Estimates of the amplitudes of the forced responses of the surface temperature field over the last century are provided by a signal processing scheme utilizing space–time empirical orthogonal functions for several combinations of station sites ...

Gerald R. North; Qigang Wu

2001-04-01T23:59:59.000Z

326

Decoupled Sampling for Real-Time Graphics Pipelines  

E-Print Network (OSTI)

We propose decoupled sampling, an approach that decouples shading from visibility sampling in order to enable motion blur and depth-of-field at reduced cost. More generally, it enables extensions of modern real-time graphics ...

Ragan-Kelley, Jonathan

2010-03-29T23:59:59.000Z

327

HEAT CAPACITY MEASUREMENTS IN PULSED MAGNETIC FIELDS  

E-Print Network (OSTI)

(World Scientific, to be published) The new NHMFL 60T quasi-continuous magnet produces a flat-top field for a period of 100 ms at 60 Tesla, and for longer time at lower fields, e.g. 0.5 s at 35 Tesla. We have developed for the first time the capability to measure heat capacity at very high magnetic fields in the NHMFL 60T quasi-continuous magnet at LANL, using a probe built out of various plastic materials. The field plateau allows us to utilize a heat-pulse method to obtain heat capacity data. Proof-of-principle heat capacity experiments were performed on a variety of correlated electron systems. Both magnet performance characteristics and physical properties of various materials studied hold out a promise of wide application of this new tool. 1 I. TECHNIQUE The 60 Tesla Long-Pulse (60TLP) magnet was recently commissioned at the Los Alamos National Laboratory. This magnet produces a flat-top field for a period of 100 ms at 60

M. Jaime; R. Movshovich; J. L. Sarrao; J. Kim; G. Stewart; W. P. Beyermann

1999-01-01T23:59:59.000Z

328

Quantum tunneling time  

E-Print Network (OSTI)

A simple model of a quantum clock is applied to the old and controversial problem of how long a particle takes to tunnel through a quantum barrier. The model I employ has the advantage of yielding sensible results for energy eigenstates, and does not require the use of time-dependant wave packets. Although the treatment does not forbid superluminal tunneling velocities, there is no implication of faster-than-light signaling because only the transit duration is measurable, not the absolute time of transit. A comparison is given with the weak-measurement post-selection calculations of Steinberg.

P. C. W. Davies

2004-03-01T23:59:59.000Z

329

NSIT Computer Time Services: Internet Time Service (ITS) ...  

Science Conference Proceedings (OSTI)

Page 1. NIST Special Publication 250-59 NIST Computer Time Services: Internet Time Service (ITS), Automated Computer Time Service (ACTS), ...

2012-09-16T23:59:59.000Z

330

Quantum Algorithms for Quantum Field Theories  

E-Print Network (OSTI)

Quantum field theory reconciles quantum mechanics and special relativity, and plays a central role in many areas of physics. We develop a quantum algorithm to compute relativistic scattering probabilities in a massive quantum field theory with quartic self-interactions (phi-fourth theory) in spacetime of four and fewer dimensions. Its run time is polynomial in the number of particles, their energy, and the desired precision, and applies at both weak and strong coupling. In the strong-coupling and high-precision regimes, our quantum algorithm achieves exponential speedup over the fastest known classical algorithm.

Stephen P. Jordan; Keith S. M. Lee; John Preskill

2011-11-15T23:59:59.000Z

331

Massive Type II in Double Field Theory  

E-Print Network (OSTI)

We provide an extension of the recently constructed double field theory formulation of the low-energy limits of type II strings, in which the RR fields can depend simultaneously on the 10-dimensional space-time coordinates and linearly on the dual winding coordinates. For the special case that only the RR one-form of type IIA carries such a dependence, we obtain the massive deformation of type IIA supergravity due to Romans. For T-dual configurations we obtain a `massive' but non-covariant formulation of type IIB, in which the 10-dimensional diffeomorphism symmetry is deformed by the mass parameter.

Olaf Hohm; Seung Ki Kwak

2011-08-24T23:59:59.000Z

332

Quantum Algorithms for Quantum Field Theories  

E-Print Network (OSTI)

Quantum field theory reconciles quantum mechanics and special relativity, and plays a central role in many areas of physics. We develop a quantum algorithm to compute relativistic scattering probabilities in a massive quantum field theory with quartic self-interactions (phi-fourth theory) in spacetime of four and fewer dimensions. Its run time is polynomial in the number of particles, their energy, and the desired precision, and applies at both weak and strong coupling. In the strong-coupling and high-precision regimes, our quantum algorithm achieves exponential speedup over the fastest known classical algorithm.

Jordan, Stephen P; Preskill, John

2011-01-01T23:59:59.000Z

333

High-frequency electric field measurement using a toroidal antenna  

DOE Patents (OSTI)

A simple and compact method and apparatus for detecting high frequency electric fields, particularly in the frequency range of 1 MHz to 100 MHz, uses a compact toroidal antenna. For typical geophysical applications the sensor will be used to detect electric fields for a wide range of spectrum starting from about 1 MHz, in particular in the frequency range between 1 to 100 MHz, to detect small objects in the upper few meters of the ground. Time-varying magnetic fields associated with time-varying electric fields induce an emf (voltage) in a toroidal coil. The electric field at the center of (and perpendicular to the plane of) the toroid is shown to be linearly related to this induced voltage. By measuring the voltage across a toroidal coil one can easily and accurately determine the electric field.

Lee, Ki Ha (Lafayette, CA)

2002-01-01T23:59:59.000Z

334

Probabilistic timed behavior trees  

Science Conference Proceedings (OSTI)

The Behavior Tree notation has been developed as a method for systematically and traceably capturing user requirements. In this paper we extend the notation with probabilistic behaviour, so that reliability, performance, and other dependability properties ... Keywords: behavior trees, model checking, probabilities, timed automata

Robert Colvin; Lars Grunske; Kirsten Winter

2007-07-01T23:59:59.000Z

335

Japanese refrigerators field testing  

SciTech Connect

Residential refrigerators consume the equivalent of 1700 megawatts (MW) of baseload power in the Bonneville Power Administration (BPA) service area. Japanese manufacturers have designed refrigerator units that appear more energy efficient than some currently available American models. This report summarizes preliminary findings from field testing of 12 refrigerators of Japanese manufacture to evaluate annual kilowatt hour (kWh) use during actual operation. The units have also undergone laboratory testing sponsored by BPA at ETL Testing Laboratories, Inc. in Cortland, New York. A final report of the project -- due at the end of 1989 -- will correlate in detail the results of field and laboratory tests in comparison to performance ratings determined by the manufacturer.

Lou, A.T.

1989-03-01T23:59:59.000Z

336

Japanese Refrigerators Field Testing.  

SciTech Connect

Residential refrigerators consume the equivalent of 1700 megawatts (MW) of baseload power in the Bonneville Power Administration (BPA) service area. Japanese manufacturers have designed refrigerator units that appear more energy efficient than some currently available American models. This report summarizes preliminary findings from field testing of 12 refrigerators of Japanese manufacture to evaluate annual kilowatt hour (kWh) use during actual operation. The units have also undergone laboratory testing sponsored by BPA at ETL Testing Laboratories, Inc. in Cortland, New York. A final report of the project -- due at the end of 1989 -- will correlate in detail the results of field and laboratory tests in comparison to performance ratings determined by the manufacturer.

Lou, Albert T.

1989-03-01T23:59:59.000Z

337

Genepool Time Heatmaps  

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

Genepool Time Heatmaps Genepool Time Heatmaps Heatmap of Time and Slots Requested vs Time Waited (in hours) | Queue: All | Last 7 Days Time Requested Slots 1wk Job Count Longest Wait 1 23.0 (233) 0.37 (1819) 27.54 (49888) 5.85 (124593) 1.23 (39835) 0.34 (732) 0 0.4 (224) 0.02 (1) 217325 538.96 2 0 0.01 (19) 2.54 (78) 0.2 (140) 0.99 (2683) 0 0 0 0 2920 9.1 4 0.08 (1) 0 2.82 (141) 0.36 (143) 1.07 (12) 0.06 (5) 0.01 (5) 0.06 (1) 1.3 (5) 313 20.48 6 0.01 (2) 0 0.09 (32) 0.07 (1) 0 0 0 0 0 35 1.22 8 0.04 (24) 4.32 (7423) 5.31 (1999) 0.53 (316) 13.14 (2486) 0.01 (2) 1.21 (88) 1.3 (34) 8.33 (68) 12440 46.16 10 0 0 0 0 0 0 0 8.56 (1) 0 1 8.56 16 0 0 0 0.03 (1) 0 0 0 0 0 1 0.03 24 0 0 0 0 0 0 0 0 0.01 (1) 1 0.01 32 0 0 0 0.04 (14) 0 0 0 0.01 (6) 0 20 0.26

338

Field Force Data Visualization  

Science Conference Proceedings (OSTI)

This report describes the development of a prototype data visualization app for utility workers. By using commercially available tablet technology, open standards, and open source software, utilities may be able to improve data capabilities of deployed field crews with modest investment in technology.BackgroundUtilities have been investing heavily in communications and information technology (IT) infrastructure in the past several years.  While strides are being ...

2012-11-21T23:59:59.000Z

339

Ca rlsbad Field Office  

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

En ergy En ergy Ca rlsbad Field Office P. O . Box 3090 Carlsbad , New Mexico 88221 AUG 2 9 2013 Mr. John E. Kieling , Chief Hazardous Waste Bureau New Mexico Environment Department 2905 Rodeo Park Drive East, Building 1 Santa Fe, New Mexico 87505-6303 Subject: Notification of Class 1 Permit Modification to the Waste Isolation Pilot Plant Hazardous Waste Facility Permit Number: NM4890139088-TSDF

340

Field Guide: Coatings Assessment  

Science Conference Proceedings (OSTI)

The Electric Power Research Institute (EPRI) has numerous products to help plant personnel meet the challenges of working with aging systems, structures, and components, but none that comprehensively address protective coatings and linings. This field guide provides a compilation of protective coating and lining information in a form that allows the user to have a ready reference available during condition assessment of the various protective coatings and linings used in the plant.

2012-05-14T23:59:59.000Z

Note: This page contains sample records for the topic "field time offset" 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

Determination of far-field antenna patterns from near-field measurements  

E-Print Network (OSTI)

Abstracf-In many cases, it is impractical or impossible to make antenna patfern measurements on a conventional far-field range; the distance to the radiating far field may be too long, it may be impractical to move the antenna from its operating environment to an antenna range, or the desired amount of pattern data may require too much time on a far-field range. For these and other reasons, it is often desirable or necessary to determine far-field antenna patterns from measurements made in the radiating near-field region; three basic techniques for accomplishing this have proven to be successful. In the 6rst technique, the aperture phase and amplitude distributions are sampled by a scanning field probe, and then the measured distributions are transformed to the far field. In the second technique, a plane wave that is approximately uniform in amplitude is created by a feed and large reflector in the immediate vicinity of the test antenna. And in the third technique, the test antenna is focused within the radiating near-field region, patterns are measured at the reduced range, and then the antenna is refocused to infinity. Each of these techniques is discussed, and the various advantages and limitations of each technique are presented.

Richard C. Johnson; H. Allen Ecrer; J. Searcy Hollis

1973-01-01T23:59:59.000Z

342

Graduate Program Time Limits and Work Schedules  

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

Time Limits and Work Schedules Time Limits and Work Schedules Graduate Program Time Limits and Work Schedules Point your career towards LANL: work with the best minds on the planet in an inclusive environment that is rich in intellectual vitality and opportunities for growth. Contact Student Programs (505) 665-8899 Email Time Limits The length of participation in the graduate program is limited as follows: With a bachelor's pursuing a master's degree: 4 years With a bachelor's pursuing a PhD: 7 years With a master's pursuing a second master's degree: 2 years With a master's pursuing a PhD: 4 years With a master's pursuing a master's and PhD in a new field: 6 years Students may remain in the GRA program for up to three months after receiving their PhD. Work schedules Year-round students Students participating in the MBA program, post-baccalaureate appointments,

343

Warped Conformal Field Theory  

E-Print Network (OSTI)

We study field theories in two spacetime dimensions invariant under a chiral scaling symmetry that acts only on right-movers. The local symmetries include one copy of the Virasoro algebra and a U(1) current algebra. This differs from the 2d conformal group, but in some respects is equally powerful in constraining the theory. In particular, the symmetries on a torus lead to modular covariance of the partition function, which is used to derive a universal formula for the asymptotic density of states. For an application we turn to the holographic description of black holes in quantum gravity, motivated by the fact that the symmetries in the near horizon geometry of any extremal black hole are identical to those of a 2d field theory with chiral scaling. We consider two examples: black holes in warped AdS_3 in topologically massive gravity, and in string theory. In both cases, the density of states in the 2d field theory reproduces the Bekenstein-Hawking entropy of black holes in the gravity theory.

Detournay, Stephane; Hofman, Diego M

2012-01-01T23:59:59.000Z

344

Warped Conformal Field Theory  

E-Print Network (OSTI)

We study field theories in two spacetime dimensions invariant under a chiral scaling symmetry that acts only on right-movers. The local symmetries include one copy of the Virasoro algebra and a U(1) current algebra. This differs from the 2d conformal group, but in some respects is equally powerful in constraining the theory. In particular, the symmetries on a torus lead to modular covariance of the partition function, which is used to derive a universal formula for the asymptotic density of states. For an application we turn to the holographic description of black holes in quantum gravity, motivated by the fact that the symmetries in the near horizon geometry of any extremal black hole are identical to those of a 2d field theory with chiral scaling. We consider two examples: black holes in warped AdS_3 in topologically massive gravity, and in string theory. In both cases, the density of states in the 2d field theory reproduces the Bekenstein-Hawking entropy of black holes in the gravity theory.

Stephane Detournay; Thomas Hartman; Diego M. Hofman

2012-10-01T23:59:59.000Z

345

Rain initiation time in turbulent warm clouds  

E-Print Network (OSTI)

We present a mean-field model that describes droplet growth due to condensation and collisions and droplet loss due to fallout. The model allows for an effective numerical simulation. We study how the rain initiation time depends on different parameters. We also present a simple model that allows one to estimate the rain initiation time for turbulent clouds with an inhomogeneous concentration of cloud condensation nuclei. In particular, we show that over-seeding even a part of a cloud by small hygroscopic nuclei one can substantially delay the onset of precipitation.

Falkovich, G; Vucelja, M

2004-01-01T23:59:59.000Z

346

Rain initiation time in turbulent warm clouds  

E-Print Network (OSTI)

We present a mean-field model that describes droplet growth due to condensation and collisions and droplet loss due to fallout. The model allows for an effective numerical simulation. We study how the rain initiation time depends on different parameters. We also present a simple model that allows one to estimate the rain initiation time for turbulent clouds with an inhomogeneous concentration of cloud condensation nuclei. In particular, we show that over-seeding even a part of a cloud by small hygroscopic nuclei one can substantially delay the onset of precipitation.

G. Falkovich; M. G. Stepanov; M. Vucelja

2004-11-22T23:59:59.000Z

347

Dr. Dave Moody to Lead the Carlsbad Field Office  

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

U.S. Department of Energy (DOE) announced today that long-time Los Alamos National Laboratory (LANL) scientist Dr. Dave Moody will be the new manager of the Carlsbad Field Office...

348

Field analysis: getting useful and low-cost interprocedural information  

Science Conference Proceedings (OSTI)

We present a new limited form of interprocedural analysis called field analysis that can be used by a compiler to reduce the costs of modern language features such as object-oriented programming, automatic memory management, and run-time ...

Sanjay Ghemawat; Keith H. Randall; Daniel J. Scales

2000-08-01T23:59:59.000Z

349

Rapid modeling of field maintenance using discrete event simulation  

Science Conference Proceedings (OSTI)

Discrete event simulation has been applied to a wide range of applications areas due to its ability to represent stochastic systems over time. Maintenance, particularly field maintenance, is complex due to the interaction of different sub-systems of ...

Abdullah A. Alabdulkarim; Peter D. Ball; Ashutosh Tiwari

2011-12-01T23:59:59.000Z

350

Quantum interference of electromagnetic fields from remote quantum memories  

E-Print Network (OSTI)

We observe quantum, Hong-Ou-Mandel, interference of fields produced by two remote atomic memories. High-visibility interference is obtained by utilizing the finite atomic memory time in four-photon delayed coincidence measurements. Interference of fields from remote atomic memories is a crucial element in protocols for scalable generation of multi-node remote qubit entanglement.

T. Chaneliere; D. N. Matsukevich; S. D. Jenkins; S. -Y. Lan; R. Zhao; T. A. B. Kennedy; A. Kuzmich

2006-09-27T23:59:59.000Z

351

Detection of Ionizing Radiation Using Graphene Field Effect Transistors  

E-Print Network (OSTI)

electrode, while the other electrode is the graphene layer. Applying a gate voltage, VG, field lines) of graphite, which has unique electronic properties [1]. Graphene has a high carrier mobility, about 10 times, and a layer of graphene on top (Fig. 2). The electric field is created by applying the gate voltage from

Chen, Yong P.

352

Rendering for an interactive 360° light field display  

Science Conference Proceedings (OSTI)

We describe a set of rendering techniques for an autostereoscopic light field display able to present interactive 3D graphics to multiple simultaneous viewers 360 degrees around the display. The display consists of a high-speed video projector, a spinning ... Keywords: autostereocopic displays, graphics hardware, image-based rendering, light field, real-time rendering

Andrew Jones; Ian McDowall; Hideshi Yamada; Mark Bolas; Paul Debevec

2007-08-01T23:59:59.000Z

353

Timed fast charger  

Science Conference Proceedings (OSTI)

In a charger for rechargeable electrochemical cells, a transformer charging circuit supplies a charging current to the battery at a fast charge rate for a predetermined time followed by a continuous slow charge rate. A normally closed automatic reset thermostat in series with the rectifier diodes in the charging circuit, and thermally coupled to them, opens after a period of time, dependent upon the heat generated by the rectifier diodes and upon the thermal mass of the thermostat and diodes, and terminates the fast charge current. A resistor, shunted across the thermostat and thermally coupled to it, establishes a slow charge rate current path when the thermostat opens. Heat generated in the resistor causes the thermostat to remain open as long as the battery is connected and ac power is supplied to the transformer primary winding.

Mullersman, F.H.

1981-10-27T23:59:59.000Z

354

Internet Topology over Time  

E-Print Network (OSTI)

There are few studies that look closely at how the topology of the Internet evolves over time; most focus on snapshots taken at a particular point in time. In this paper, we investigate the evolution of the topology of the Autonomous Systems graph of the Internet, examining how eight commonly-used topological measures change from January 2002 to January 2010. We find that the distributions of most of the measures remain unchanged, except for average path length and clustering coefficient. The average path length has slowly and steadily increased since 2005 and the average clustering coefficient has steadily declined. We hypothesize that these changes are due to changes in peering policies as the Internet evolves. We also investigate a surprising feature, namely that the maximum degree has changed little, an aspect that cannot be captured without modeling link deletion. Our results suggest that evaluating models of the Internet graph by comparing steady-state generated topologies to snapshots of the real data ...

Edwards, Benjamin; Stelle, George; Forrest, Stephanie

2012-01-01T23:59:59.000Z

355

Analyses of Magnetic-Field Peak-Exposure Summary Measures  

Science Conference Proceedings (OSTI)

Past emphasis on exposure characterization and analyses for magnetic fields has been on measures of central tendency, such as long-term time-weighted average (TWA) exposure. Past emphasis on exposure characterization and analyses for magnetic fields has been on measures of central tendency such as long-term time-weighted average (TWA) exposure. This report examines peak exposure measures such as the maximum and 99th percentile of measurements during a day. EPRI sponsored this study to enhance industry kn...

2003-11-19T23:59:59.000Z

356

Field testing plan for unsaturated zone monitoring and field studies  

Science Conference Proceedings (OSTI)

The University of Arizona, in cooperation with the Bureau of Economic Geology at The University of Texas at Austin, and Stephens and Associates in Albuquerque, New Mexico has developed a field testing plan for evaluating subsurface monitoring systems. The U.S. Nuclear Regulatory Commission has requested development of these testing plans for low-level radioactive waste disposal sites (LLW) and for monitoring at decommissioned facilities designated under the {open_quotes}Site Decommissioning Management Plan{close_quotes} (SDMP). The tests are conducted on a 50 m by 50 m plot on the University of Arizona`s Maricopa Agricultural Center. Within the 50 m by 50 m plot one finds: (1) an instrumented buried trench, (2) monitoring islands similar to those proposed for the Ward Valley, California LLW Facility, (3) deep borehole monitoring sites, (4) gaseous transport monitoring, and (5) locations for testing non-invasive geophysical measurement techniques. The various subplot areas are instrumented with commercially available instruments such as neutron probes, time domain reflectometry probes, tensiometers, psychrometers, heat dissipation sensors, thermocouples, solution samplers, and cross-hole geophysics electrodes. Measurement depths vary from ground surface to 15 m. The data from the controlled flow and transport experiments, conducted over the plot, will be used to develop an integrated approach to long-term monitoring of the vadose zone at waste disposal sites. The data will also be used to test field-scale flow and transport models. This report describes in detail the design of the experiment and the methodology proposed for evaluating the data.

Young, M.H.; Wierenga, P.J.; Warrick, A.W. [and others

1996-10-01T23:59:59.000Z

357

A model for effective field enhancement for Fowler-Nordheim field emission  

SciTech Connect

The local field enhancement factor {beta} is often introduced in the Fowler-Nordheim equation to represent the geometrical effects at the surface of the cathode, where {beta}(s)=E{sub n}(s)/E{sub 0} for macroscopic applied field E{sub 0}. Local variation of {beta} determines the local normal surface electric field, E{sub n}(s), resulting in local dependence of injection current by the Fowler-Nordheim law. In computational models, it is impractical to determine the time-dependent local surface field each time step on a microscopic space scale. Effective {beta} is introduced in this paper which allows us to study the emission properties at a macroscopic scale. Microscopic (subgrid) local effective {beta} is calculated only at the initial time step, and then the effective {beta} can be recomputed for different surface electrical field through this model. The model allows reduction of dimensionality as well as the ability to include subgrid effects. The model is demonstrated on fundamental cases and compared to a calculation with a mesh fine enough to resolve the geometric features.

Feng, Y.; Verboncoeur, J.P. [4167 Etcheverry Hall, Department of Nuclear Engineering, University of California Berkeley, California 94720-1730 (United States)

2005-10-01T23:59:59.000Z

358

Finite temperature field theory and phase transitions  

E-Print Network (OSTI)

We review different aspects of field theory at zero and finite temperature, related to the theory of phase transitions. We discuss different renormalization conditions for the effective potential at zero temperature, emphasizing in particular the MS-bar renormalization scheme. Finite temperature field theory is discussed in the real and imaginary time formalisms, showing their equivalence in simple examples. Bubble nucleation by thermal tunneling, and the subsequent development of the phase transition is described in some detail. Some attention is also devoted to the breakdown of the perturbative expansion and the infrared problem in the finite temperature field theory. Finally the application to baryogenesis at the electroweak phase transition is done in the Standard Model and in the Minimal Supersymmetric Standard Model. In all cases we have translated the condition of not washing out any previously generated baryon asymmetry by upper bounds on the Higgs mass.

Mariano Quiros

1999-01-14T23:59:59.000Z

359

Investigation of electric fields of EHV substations  

SciTech Connect

60-Hz and 24-kHz capacitive and monopole probes and testing techniques were developed for full-scale and model ground level electric field strength measurements for EHV substations. A model of an existing 345-kV substation was designed and built. The model was energized using a three phase 24-kHz regulated source. Comparison of corresponding test points shows that the agreement between substation and model measurements is good. Large amounts of model test data can be taken in a short time. Energized scale models can be used in a substation design tool so that the electric field may be mapped and, if necessary, modified. A successful and useful predictive tool has been developed that can handle the three-dimensional complex substation electric fields. Further development will result in a widely available and flexible analog design tool.

Sebo, S.A.; Caldecott, R.

1977-01-01T23:59:59.000Z

360

Superradiant instabilities of rotating black holes in the time domain  

E-Print Network (OSTI)

Bosonic fields on rotating black hole spacetimes are subject to amplification by superradiance, which induces exponentially-growing instabilities (the `black hole bomb') in two scenarios: if the black hole is enclosed by a mirror, or if the bosonic field has rest mass. Here we present a time-domain study of the scalar field on Kerr spacetime which probes ultra-long timescales up to $t \\lesssim 5 \\times 10^6 M$, to reveal the growth of the instability. We describe an highly-efficient method for evolving the field, based on a spectral decomposition into a coupled set of 1+1D equations, and an absorbing boundary condition inspired by the `perfectly-matched layers' paradigm. First, we examine the mirror case to study how the instability timescale and mode structure depend on mirror radius. Next, we examine the massive-field, whose rich spectrum (revealed through Fourier analysis) generates `beating' effects which disguise the instability. We show that the instability is clearly revealed by tracking the stress-energy of the field in the exterior spacetime. We calculate the growth rate for a range of mass couplings, by applying a frequency-filer to isolate individual modal contributions to the time-domain signal. Our results are in accord with previous frequency-domain studies which put the maximum growth rate at $\\tau^{-1} \\approx 1.72 \\times 10^{-7} (GM/c^3)^{-1}$ for the massive scalar field on Kerr spacetime.

Sam R. Dolan

2012-12-06T23:59:59.000Z

Note: This page contains sample records for the topic "field time offset" 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

Golden Field Office  

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

Department of Energy Department of Energy Golden Field Office 1617 Cole Boulevard Golden, Colorado 80401-3393 FINDING OF NO SIGNIFICANT IMPACT UNIVERSITY OF MAINE'S DEEPWATER OFFSHORE FLOATING WIND TURBINE TESTING AND DEMONSTRATION PROJECT - CASTINE DOE/EA-1792-S1 AGENCY: U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy ACTION: Finding of No Significant Impact (FONSI) SUMMARY: The U.S. Department of Energy (DOE) has completed a Supplemental Environmental Assessment (Supplemental EA) DOE/EA-1792-S1 for the University of Maine's (UMaine) Deepwater Offshore Floating Wind Turbine Testing and Demonstration Project - Castine. DOE prepared the Supplemental EA to evaluate the potential environmental impacts of

362

Statistical Tests of Taylor’s Hypothesis: An Application to Precipitation Fields  

Science Conference Proceedings (OSTI)

The Taylor hypothesis (TH) as applied to rainfall is a proposition about the space–time covariance structure of the rainfall field. Specifically, it supposes that if a spatiotemporal precipitation field with a stationary covariance Cov(r, ?) in ...

Bo Li; Aditya Murthi; Kenneth P. Bowman; Gerald R. North; Marc G. Genton; Michael Sherman

2009-02-01T23:59:59.000Z

363

Visualizing Atmospheric Fields on a Personal Computer: Application to Potential Vorticity Analysis  

Science Conference Proceedings (OSTI)

A four-dimensional computer-analysis program for visualizing atmospheric fields on a personal computer is presented. The Program can display, on screen, a fast-time animation of meteorological fields on various surfaces or cross sections.

B. U. Neeman; P. Alpert

1990-02-01T23:59:59.000Z

364

QUADRENNIAL MCNP TIMING STUDY  

Science Conference Proceedings (OSTI)

The Los Alamos National Laboratory Monte Carlo N-Particle radiation transport code, MCNP, is widely used around the world for many radiation protection and shielding applications. As a well-known standard it is also an excellent vehicle for assessing the relative performance of scientific computing platforms. Every three-to-four years a new version of MCNP is released internationally by the Radiation Safety Information Computational Center (RSICC) in Oak Ridge, Tennessee. For each of the past few releases, we have also done a timing study to assess the progress of scientific computing platforms and software. These quadrennial timing studies are valuable to the radiation protection and shielding community because (a) they are performed by a recognized scientific team, not a computer vendor, (b) they use an internationally recognized code for radiation protection and shielding calculations, (c) they are eminently reproducible since the code and the test problems are internationally distributed. Further, if one has a computer platform, operating system, or compiler not presented in our results, its performance is directly comparable to the ones we report because it can use the same code, data, and test problems as we used. Our results, using a single processor per platform, indicate that hardware advances during the past three years have improved performance by less than a factor of two and software improvements have had a marginal effect on performance. The most significant impacts on performance have resulted from developments in multiprocessing and multitasking. The other most significant advance in the last three years has been the accelerated improvements in personal computers. In the last timing study, the tested personal computer was approximately a factor of four slower that the fastest machine tested, a DEC Alphastation 500. In the present study, the fastest PC tested was less than a factor of two slower than the fastest platform, which is a Compaq (previously DEC) Alpha XP1000.

E. C. SELCOW; B. D. LANSRUD

2000-09-01T23:59:59.000Z

365

Exploiting VERITAS Timing Information  

E-Print Network (OSTI)

The 499 pixel photomultiplier cameras of the VERITAS gamma ray telescopes are instrumented with 500MHz sampling Flash ADCs. This paper describes a preliminary investigation of the best methods by which to exploit this information so as to optimize the signal-to-noise ratio for the detection of Cherenkov light pulses. The FADCs also provide unprecedented resolution for the study of the timing characteristics of Cherenkov images of cosmic-ray and gamma-ray air showers. This capability is discussed, together with the implications for gamma-hadron separation.

J. Holder; for the VERITAS Collaboration

2005-07-19T23:59:59.000Z

366

Quasi light fields: Extending the light field to coherent radiation  

E-Print Network (OSTI)

Imaging technologies such as dynamic viewpoint generation are engineered for incoherent radiation using the traditional light field, and for coherent radiation using electromagnetic field theory. We present a model of ...

Accardi, Anthony J.

367

Photon Redshift in a Magnetic field  

E-Print Network (OSTI)

Previous results from the authors concerning the arising a tiny photon anomalous paramagnetic moment are also interpreted as a red-shift in analogy to the gravitational known effect. It is due to the photon interaction with the magnetized virtual electron-positron background which withdraw transverse momentum from photons and is polarization-dependent. If the photon frequency red-shift implies a change in time, a clock would go faster for increasing magnetic field intensity.

Rojas, H Pérez

2010-01-01T23:59:59.000Z

368

Chaotic time series forecasting using locally quadratic fuzzy neural models  

Science Conference Proceedings (OSTI)

Time series forecasting in highly nonlinear and chaotic systems is a challenging research area with a variety of applications in economics, environmental sciences and various fields of engineering. This paper presents a novel Locally Quadratic Fuzzy ... Keywords: chaotic time series, forecasting, locally quadratic neural fuzzy model

Mohammad J. Mahjoob; Majid Abdollahzade; Reza Zarringhalam; Ahmad Kalhor

2008-05-01T23:59:59.000Z

369

Real-time deformable models for surgery simulation: a survey  

Science Conference Proceedings (OSTI)

Simulating the behaviour of elastic objects in real time is one of the current objectives of computer graphics. One of its fields of application lies in virtual reality, mainly in surgery simulation systems. In computer graphics, the models used for ... Keywords: Animation, Deformable model, Elasticity, Real time, Surgery simulation

U. Meier; O. López; C. Monserrat; M. C. Juan; M. Alcañiz

2005-03-01T23:59:59.000Z

370

An efficient and secure protocol for sensor network time synchronization  

Science Conference Proceedings (OSTI)

The emerging field of wireless sensor networks offers countless possibilities for achieving large scale monitoring in a distributed environment. These networks of resource constrained nodes require time synchronization for various distributed operations, ... Keywords: cross-layer control, passive participation, sensor networks, tempest, time synchronization

Emerson Farrugia; Robert Simon

2006-02-01T23:59:59.000Z

371

Quantum theory and gravity from a space-time wave  

E-Print Network (OSTI)

The quantum properties and gravitational field of a particle system are derived from a quantum theory of space-time. A field with quantized space-time vibrations has the same properties and equations for a particle field in quantum theory. The statistical nature of quantum mechanics can be explained by assuming the amplitudes of space-time waves serve as additional variables of the theory. The difficulty of associating a physical meaning with the quantum wave due to the unobservable overall phase is resolved. Instead of attempting to derive the properties of space-time from a quantum theory, as is usually the case, the quantum properties of matter can be derived from a theory of space-time. The energy of a space-time wave must correspond to the rest mass of a real particle; the vibrations are thus quantized. It is also demonstrated that the geometrical structure derived from a quantized space-time vibration is equivalent to the gravitational field of a point mass in general relativity. The fundamental questions of why and how a point mass gives rise to its gravitational singularity and curved space-time geometry can thereby be explained.

Hou Yau

2007-06-01T23:59:59.000Z

372

Orbital tuning of geomagnetic polarity time-scales  

E-Print Network (OSTI)

Orbital tuning of geomagnetic polarity time-scales By Dennis V. Kent Lamont-Doherty Earth of a previous occurrence (Cox 1969; McFadden & Merrill 1993). The chronology of reversals in a geomagnetic Paper #12;1996 D. V. Kent reverse normal Figure 1. Field of the time-averaged geomagnetic axial dipole

373

One-point statistics and intermittency of induced electric field in the solar wind  

E-Print Network (OSTI)

The interplanetary induced electric field e=vxb is studied, using solar wind time series. The probability distribution functions (PDFs) of the electric field components are measured from the data and their non-gaussianity is discussed. Moreover, for the first time we show that the electric field turbulence is characterized by intermittency. This point is addressed by studying, as usual, the scaling of the PDFs of field increments, which allows a quantitative characterization of intermittency.

Luca Sorriso-Valvo; Vincenzo Carbone; Roberto Bruno

2004-05-26T23:59:59.000Z

374

Efficient thermal field computation in phase-field models  

Science Conference Proceedings (OSTI)

We solve the phase-field equations in two dimensions to simulate crystal growth in the low undercooling regime. The novelty is the use of a fast solver for the free space heat equation to compute the thermal field. This solver is based on the efficient ... Keywords: Crystal growth, Dendritic solidification, Diffusion equation, Fast solvers, Integral representation, Phase-field, Unbounded domain

Jing-Rebecca Li; Donna Calhoun; Lucien Brush

2009-12-01T23:59:59.000Z

375

Electric Field Reversal in Sprite Electric Field Signature  

Science Conference Proceedings (OSTI)

In measurements of the electric field associated with the current of a sprite 450 km from ground-based field sensors, it was observed that the sign of the electric field was positive when positive charge was lowered from the ionosphere. A recent ...

Richard G. Sonnenfeld; William W. Hager

2013-05-01T23:59:59.000Z

376

System level energy management in networked real-time embedded systems.  

E-Print Network (OSTI)

??Real-time embedded systems play a prominent role in a variety of applications ranging from medical sensors in human body to signaling sensors in war fields.… (more)

Gathala, Sudha Anil Kumar

2009-01-01T23:59:59.000Z

377

Quantum Geometry of the Dynamical Space-time  

E-Print Network (OSTI)

Quantum theory of field (extended) objects without a priori space-time geometry has been represented. Intrinsic coordinates in the tangent fibre bundle over complex projective Hilbert state space $CP(N-1)$ are used instead of space-time coordinates. The fate of quantum system modeled by the generalized coherent states is rooted in this manifold. Dynamical (state-dependent) space-time arises only at the stage of the quantum "yes/no" measurement. The quantum measurement of the gauge ``field shell'' of the generalized coherent state is described in terms of the affine parallel transport of the local dynamical variables in $CP(N-1)$.

Peter Leifer

2006-11-20T23:59:59.000Z

378

Chiral Anomaly and Decay of Color Electric Field  

E-Print Network (OSTI)

Using the formula of chiral anomaly, we discuss the pair production of quarks under color electric field $\\vec{E}$ without addressing explicit formula of quark's wavefunctions. The production is assumed to occur under the effect of color magnetic field $\\vec{B}$ as well as the color electric field. We obtain the life time $t_c$ of the color electric field in the limit of $B\\gg E$. Applying it to the glasma in high-energy heavy-ion collisions, we find that $t_c\\simeq 10Q_s^{-1}$ with saturation momentum $Q_s$.

Aiichi Iwazaki

2009-04-09T23:59:59.000Z

379

Tunable Polarization of Spin Polarized Current by Magnetic Field  

SciTech Connect

The spin polarization of a high g-factor bulk semiconductor is theoretically investigated in the presence of a magnetic field parallel to a driving electric field. Calculations have been carried out using the energy-dependent relaxation time approximation in association with spin-flip scattering. As the magnitude of the magnetic field increases, the spin-polarized current alternates between the spin-up and spin-down states for the low spin-scattering system. This implies that the current polarization can be tuned by controlling the magnetic field strength, suggesting possible applications to spintronic devices. An experimental method for investigating alternative current polarization is also considered.

Joo, S.; Kim, K.; Lee, J.; Kim, T.; Rhie, K.; Hong, J.; Shin, K-H.

2010-10-10T23:59:59.000Z

380

Quark-gluon plasma in an external magnetic field  

E-Print Network (OSTI)

Using numerical simulations of lattice QCD we calculate the effect of an external magnetic field on the equation of state of the quark-gluon plasma. The results are obtained using a Taylor expansion of the pressure with respect to the magnetic field for the first time. The coefficients of the expansion are computed to second order in the magnetic field. Our setup for the external magnetic field avoids complications arising from toroidal boundary conditions, making a Taylor series expansion straightforward. This study is exploratory and is meant to serve as a proof of principle.

L. Levkova; C. DeTar

2013-09-04T23:59:59.000Z

Note: This page contains sample records for the topic "field time offset" 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

Electric Fields in a Tokamak  

E-Print Network (OSTI)

A self-consistent analysis of the electric fields in a tokamak yields the result that the poloidal and radial electrostatic fields must vanish for a toroidally symmetric equilibrium.

Johnson, Robert W

2008-01-01T23:59:59.000Z

382

Wavelets and Field Forecast Verification  

Science Conference Proceedings (OSTI)

Current field forecast verification measures are inadequate, primarily because they compress the comparison between two complex spatial field processes into one number. Discrete wavelet transforms (DWTs) applied to analysis and contemporaneous ...

William M. Briggs; Richard A. Levine

1997-06-01T23:59:59.000Z

383

EA for Well Field Development at Patua Geothermal Area -  

Open Energy Info (EERE)

for Well Field Development at Patua Geothermal Area - for Well Field Development at Patua Geothermal Area - DOI-BLM-NV-C010-2011-00016-EA Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home NEPA Document Collection for: EA for Well Field Development at Patua Geothermal Area - DOI-BLM-NV-C010-2011-00016-EA EA at Patua Geothermal Area for Geothermal/Exploration, Geothermal/Well Field, Patua Geothermal Project Phase II General NEPA Document Info Energy Sector Geothermal energy Environmental Analysis Type EA Applicant Gradient Resources Geothermal Area Patua Geothermal Area Project Location Fernley, Nevada Project Phase Geothermal/Exploration, Geothermal/Well Field Techniques Drilling Techniques, Thermal Gradient Holes Time Frame (days) NEPA Process Time 327 Participating Agencies Lead Agency BLM Funding Agency none provided

384

Ionisation of a quantum dot by electric fields  

Science Conference Proceedings (OSTI)

We have derived analytical formulas for differential and total ionisation probabilities of a two-dimensional quantum dot by a constant electric field. In the adiabatic approximation, we have calculated the probability of this process in the field of a plane electromagnetic wave and in a superposition of constant and alternating electric fields. The imaginary-time method is used to obtain the momentum distribution of the ionisation probability of a bound system by an intense field generated by a superposition of parallel constant and alternating electric fields. The total probability of the process per unit time is calculated with exponential accuracy. The dependence of the results obtained on the characteristic parameters of the problem is investigated. (laser applications and other topics in quantum electronics)

Eminov, P A; Gordeeva, S V

2012-08-31T23:59:59.000Z

385

Golden Field Office  

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

1617 Cole Boulevard Golden , Colorado 80401-3393 DOE/EA-1791 FINDING OF NO SIGNIFICANT IMPACT UNIVERSITY OF MINNESOTA WIND ENERGY RESEARCH CONSORTIllM PROJECT AGENCY: U.S. Department of Energy, Golden Field Office ACTION : Finding of No Significant Impact (FONSI) SUMMARY: The U. S. Department of Energy (DOE) is proposing to authorize the expenditure of Federal funding by the University of Minnesota to design, permit, and construct a wind turbine research facility I. This funding has been appropriated under the American Recovery and Reinvestment Act of2009. The University would use the funding to install a wind turbine research facility at its University of Minnesota Outreach Research and Education (UMore) Park in Rosemount, Minnesota. The proposed research facility would consist of a 2.5-megawatt-

386

Golden Field Office  

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

FINDING OF NO SIGNIFICANT IMPACT FINDING OF NO SIGNIFICANT IMPACT MONARCH WARREN COUNTY WIND TURBINE PROJECT LENOX TOWNSIDP, WARREN COUNTY, IL AGENCY: U.S. Department of Energy (DOE), Golden Field Office ACTION: Finding orNo Significant Impact (FONS!) DOEIEA-JSOO SUMMARY: The U.S. Department of Energy (DOE) provided Federal funding appropriated under the American Reinvestment and Recovery Act 0(2009 to the Illinois Department ofComrnerce and Econom ic Opportunity (DeEO) under the State Energy Program (SEP). DeEO proposes to provide approximately $5 million of its SEP funds to Monarch Wind Power (MWP) for the Monarch Warren County Wind Turbine Project (MWTP). DOE's Proposed Action is to authorize the expenditure of Federal funding under State Energy Program to design, permit, and construct

387

ARM - Field Campaigns  

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

alpacas clouds-anvil german-scene instrumentfield pye-night racoro-inst rhubc-layout snowy-site twpice-ship walter-annemarie alpacas clouds-anvil german-scene instrumentfield pye-night racoro-inst rhubc-layout snowy-site twpice-ship walter-annemarie How Do I Propose a Campaign? First, review the guidelines for submitting proposals. Next, submit a preproposal; a short summary of the proposed campaign. Wait for a response from the Infrastructure Management Board (IMB) and/or ARM Science Board. A full proposal or science plan, may be requested. Decision is made-now what is expected? ARM Climate Research Facility users regularly conduct field campaigns to augment routine data acquisitions and to test and validate new instruments. Announcements 13 Dec 2013 Now accepting proposals for use of an AMF, AAF, or augment observations at one of our fixed sites. Smaller campaigns in FY2014 and FY2015 can also be

388

Golden Field Office  

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

80401 -3393 DOEIEA-1818 80401 -3393 DOEIEA-1818 FINDING OF NO SIGNIFICANT IMPACT PETTISVILLE WIND ENERGY PROJECT AGENCY: U.S . Department of Energy, Golden Field Office ACTION: Finding of No Significant Impact (FONSI) SUMMARY: The U.S. Department of Energy (DOE) provided Federal funding to the Ohio Department of Development (0000) under the State Energy Program (SEP). 0000 proposes to provide $1 ,225 ,000 of its SEP funds to the Pettisvil Ie Local Schools (Pettisville) for the Pettisville Local Schools Wind Energy Project (Wind Energy Project). DOE' s Proposed Action is to authorize the expenditure of Federal funding under State Energy Program to design, permit, and construct the Pettisville Wind Energy Project, a 750-kilowatt wind turbine at the Pettisville Pre-Kindergarten through Twelfth Grade School located at

389

Diamond-graphite field emitters  

DOE Patents (OSTI)

A field emission electron emitter comprising an electrode of diamond and a conductive carbon, e.g., graphite, is provided.

Valone, Steven M. (Santa Fe, NM)

1997-01-01T23:59:59.000Z

390

Direct drive field actuator motors  

DOE Patents (OSTI)

A positive-drive field actuator motor is described which includes a stator carrying at least one field actuator which changes in dimension responsive to application of an energy field, and at least one drive shoe movable by the dimensional changes of the field actuator to contact and move a rotor element with respect to the stator. Various embodiments of the motor are disclosed, and the rotor element may be moved linearly or arcuately. 62 figs.

Grahn, A.R.

1998-03-10T23:59:59.000Z

391

Revitalizing an old oil field  

Science Conference Proceedings (OSTI)

Redevelopment of the Olney oil field in Illinois is described. First discovered in 1936, production peaked in 1941 when over 30,000 bopd were produced. In 1970, 600 wells in the Olney field pumped only 4000 bpd. Since the decontrol of crude oil prices, a redevelopment project has begun in the field. The project includes well stimulation techniques plus newly drilled or deepened wells. Present production in the Olney field has reached 5000 bopd.

Ortiz, S.

1981-12-01T23:59:59.000Z

392

Quantum-field theories as representations of a single $^\\ast$-algebra  

E-Print Network (OSTI)

We show that many well-known quantum field theories emerge as representations of a single $^\\ast$-algebra. These include free quantum field theories in flat and curved space-times, lattice quantum field theories, Wightman quantum field theories, and string theories. We prove that such theories can be approximated on lattices, and we give a rigorous definition of the continuum limit of lattice quantum field theories.

Andreas Raab

2013-02-17T23:59:59.000Z

393

Magnetic-field-dosimetry system  

DOE Patents (OSTI)

A device is provided for measuring the magnetic field dose and peak field exposure. The device includes three Hall-effect sensors all perpendicular to each other, sensing the three dimensional magnetic field and associated electronics for data storage, calculating, retrieving and display.

Lemon, D.K.; Skorpik, J.R.; Eick, J.L.

1981-01-21T23:59:59.000Z

394

Low field magnetic resonance imaging  

DOE Patents (OSTI)

A method and system of magnetic resonance imaging does not need a large homogenous field to truncate a gradient field. Spatial information is encoded into the spin magnetization by allowing the magnetization to evolve in a non-truncated gradient field and inducing a set of 180 degree rotations prior to signal acquisition.

Pines, Alexander (Berkeley, CA); Sakellariou, Dimitrios (Billancourt, FR); Meriles, Carlos A. (Fort Lee, NJ); Trabesinger, Andreas H. (London, GB)

2010-07-13T23:59:59.000Z

395

Residential Transient Magnetic Field Research  

Science Conference Proceedings (OSTI)

Residential populations are exposed, in some measure, to transient magnetic fields. Such fields result from virtually all electric and electronic switching operations that may occur within the residence or external to the residence. This report presents the first phase of a study to better characterize these fields and, ultimately, describe their relationship to utility wiring configurations.

1994-03-01T23:59:59.000Z

396

Good Timing: NIST/CU Collaboration Adds Timing Capability ...  

Science Conference Proceedings (OSTI)

... With the added capability to track the timing of dynamic biochemical reactions, cell ... to measure sensor signals at two points in time at a rate of up to ...

2012-02-07T23:59:59.000Z

397

A Time Bucket Formulation for the TSP with Time Windows  

E-Print Network (OSTI)

Nov 10, 2009 ... The Traveling Salesman Problem with Time Windows (TSPTW) is the problem of finding a ... To obtain a good partition of the time windows, we.

398

Self-Generated Magnetic Fields in Galactic Cooling Flows  

E-Print Network (OSTI)

Interstellar magnetic fields in elliptical galaxies are assumed to have their origin in stellar fields that accompany normal mass loss from an evolving population of old stars. The seed fields are amplified by interstellar turbulence driven by stellar mass loss and supernova events. These disordered fields are further amplified by time-dependent compression in the inward moving galactic cooling flow and are expected to dominate near the galactic core. Under favorable circumstances, fields similar in strength to those observed $B \\sim 1-10~(r/10~kpc)^{-1.2}\\mu$G can be generated solely from these natural galactic processes. In general the interstellar field throughout elliptical galaxies is determined by the outermost regions in the interstellar gas where the turbulent dynamo process can occur. Because of the long hydrodynamic flow times in galactic cooling flows, currently observed magnetic fields may result from periods of intense turbulent field amplification that occurred in the outer galaxy in the distant past. Particularly strong fields in ellipticals may result from ancient galactic mergers or shear turbulence introduced at the boundary between the interstellar gas and ambient cluster gas.

William G. Mathews; Fabrizio Brighenti

1997-06-10T23:59:59.000Z

399

Multicomponent seismic monitoring of strain due to CO2 injection at Delhi field, Louisiana.  

E-Print Network (OSTI)

??Time-lapse, multicomponent seismic data are used in this thesis to monitor geomechanical changes within the reservoir and in the overburden layers at Delhi Field, Louisiana.… (more)

Bishop, John E.

2013-01-01T23:59:59.000Z

400

Probing strong-field gravity and black holes with gravitational waves  

E-Print Network (OSTI)

Gravitational wave observations will be excellent tools for making precise measurements of processes that occur in very strong- field regions of space time. Extreme mass

Hughes, Scott A.

Note: This page contains sample records for the topic "field time offset" 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

Estimation of field-scale soil hydraulic and dielectric parameters through joint inversion of GPR and hydrological data  

E-Print Network (OSTI)

Catalog of Vadose Zone Hydraulic Properties for the Hanfordand Measurement of the Hydraulic Properties of UnsaturatedEstimation for Soil Hydraulic Properties Using Zero-Offset

2005-01-01T23:59:59.000Z

402

The Heliosphere in Time  

E-Print Network (OSTI)

Because of the dynamic nature of the interstellar medium, the Sun should have encountered a variety of different interstellar environments in its lifetime. As the solar wind interacts with the surrounding interstellar medium to form a heliosphere, different heliosphere shapes, sizes, and particle contents result from the different environments. Some of the large possible interstellar parameter space (density, velocity, temperature) is explored here with the help of global heliosphere models, and the features in the resulting heliospheres are compared and discussed. The heliospheric size, expressed as distance of the nose of the heliopause to the Sun, is set by the solar wind - interstellar pressure balance, even for extreme cases. Other heliospheric boundary locations and neutral particle results correlate with the interstellar parameters as well. If the H0 clouds identified in the Millennium Arecibo survey are typical of clouds encountered by the Sun, then the Sun spends ~99.4% of the time in warm low density ISM, where the typical upwind heliosphere radii are up to two orders of magnitude larger than at present.

H. -R. Müller; P. C. Frisch; B. D. Fields; G. P. Zank

2008-10-02T23:59:59.000Z

403

Hollow cathode life time modelling.  

E-Print Network (OSTI)

??Hollow Cathodes (HCs) are of primary importance in the field of electric space propulsion, being used as electron sources in ion and Hall-effect thrusters. Hence,… (more)

Coletti, Michele

2008-01-01T23:59:59.000Z

404

Narrow field electromagnetic sensor system and method  

DOE Patents (OSTI)

A narrow field electromagnetic sensor system and method of sensing a characteristic of an object provide the capability to realize a characteristic of an object such as density, thickness, or presence, for any desired coordinate position on the object. One application is imaging. The sensor can also be used as an obstruction detector or an electronic trip wire with a narrow field without the disadvantages of impaired performance when exposed to dirt, snow, rain, or sunlight. The sensor employs a transmitter for transmitting a sequence of electromagnetic signals in response to a transmit timing signal, a receiver for sampling only the initial direct RF path of the electromagnetic signal while excluding all other electromagnetic signals in response to a receive timing signal, and a signal processor for processing the sampled direct RF path electromagnetic signal and providing an indication of the characteristic of an object. Usually, the electromagnetic signal is a short RF burst and the obstruction must provide a substantially complete eclipse of the direct RF path. By employing time-of-flight techniques, a timing circuit controls the receiver to sample only the initial direct RF path of the electromagnetic signal while not sampling indirect path electromagnetic signals. The sensor system also incorporates circuitry for ultra-wideband spread spectrum operation that reduces interference to and from other RF services while allowing co-location of multiple electronic sensors without the need for frequency assignments. 12 figs.

McEwan, T.E.

1996-11-19T23:59:59.000Z

405

DYNAMICS OF CHROMOSPHERIC UPFLOWS AND UNDERLYING MAGNETIC FIELDS  

SciTech Connect

We used H{alpha}-0.1 nm and magnetic field (at 1.56{mu}) data obtained with the New Solar Telescope to study the origin of the disk counterparts to type II spicules, so-called rapid blueshifted excursions (RBEs). The high time cadence of our chromospheric (10 s) and magnetic field (45 s) data allowed us to generate x-t plots using slits parallel to the spines of the RBEs. These plots, along with potential field extrapolation, led us to suggest that the occurrence of RBEs is generally correlated with the appearance of new, mixed, or unipolar fields in close proximity to network fields. RBEs show a tendency to occur at the interface between large-scale fields and small-scale dynamic magnetic loops and thus are likely to be associated with the existence of a magnetic canopy. Detection of kinked and/or inverse {sup Y-}shaped RBEs further confirm this conclusion.

Yurchyshyn, V.; Abramenko, V.; Goode, P. [Big Bear Solar Observatory, New Jersey Institute of Technology, Big Bear City, CA 92314 (United States)] [Big Bear Solar Observatory, New Jersey Institute of Technology, Big Bear City, CA 92314 (United States)

2013-04-10T23:59:59.000Z

406

Inexpensive Time-Lapse Digital Cameras for Studying Transient Meteorological Phenomena: Dust Devils and Playa Flooding  

Science Conference Proceedings (OSTI)

The authors describe the design and performance of inexpensive and compact time-lapse cameras suitable for field deployment in remote locations for long periods and their application to studying two time-variable meteorological phenomena in arid ...

Ralph D. Lorenz; Brian Jackson; Jason W. Barnes

2010-01-01T23:59:59.000Z

407

Optimal, real-time control--colliders  

Science Conference Proceedings (OSTI)

With reasonable definitions, optimal control is possible for both classical and quantal systems with new approaches called PISC(Parallel) and NISC(Neural) from analogy with RISC (Reduced Instruction Set Computing). If control equals interaction, observation and comparison to some figure of merit with interaction via external fields, then optimization comes from varying these fields to give design or operating goals. Structural stability can then give us tolerance and design constraints. But simulations use simplified models, are not in real-time and assume fixed or stationary conditions, so optimal control goes far beyond convergence rates of algorithms. It is inseparable from design and this has many implications for colliders. 12 refs., 3 figs.

Spencer, J.E.

1991-05-01T23:59:59.000Z

408

NIST Time Scale Data Archive  

Science Conference Proceedings (OSTI)

NIST Time Scale Data Archive. ... The AT1 scale is run in real time using data from an ensemble of cesium standards and hydrogen masers. ...

2013-08-07T23:59:59.000Z

409

Time and Frequency Division Homepage  

Science Conference Proceedings (OSTI)

... Controlled ClocksTelephone TimeDivision HistoryFrequently Asked Questions (FAQ)Time and Frequency from A to Z: An illustrated glossaryA Walk ...

2013-12-27T23:59:59.000Z

410

Time dependent Directional Profit Model for Financial Time Series Forecasting  

E-Print Network (OSTI)

Time dependent Directional Profit Model for Financial Time Series Forecasting Jingtao YAO Chew Lim@comp.nus.edu.sg Abstract Goodness­of­fit is the most popular criterion for neural network time series forecasting. In the context of financial time series forecasting, we are not only concerned at how good the forecasts fit

Yao, JingTao

411

Field Evaluation of Windows  

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

Evaluation of Windows Evaluation of Windows Last Updated: 10/20/2009 Various tools can be used to evaluate windows in the field. Unless a new window still has the NFRC label attached to it, it is nearly impossible to determine by sight what the thermal and optical performance of a window is. These tools can provide information, such as low-e coating, gap width and gas fill, that can be used to approximate the performance of a window. Solar gain and Low-e detector This device can be used to determine if a low-e coating is present in the window, what type of coating it is, and where it is located. The type of low-e coating will indicate the amount of solar gain that is admitted through the coating. Readings can be "low", "medium" or "high". The device will also indicate on which glass surface the low-e coating is in relation to the position of the device. Limitations: Only works on glass of 1/8" (3 mm) or thinner. Cost: around $350 from EDTM.com

412

Electronic field permeameter  

DOE Patents (OSTI)

For making rapid, non-destructive permeability measurements in the field, a portable minipermeameter of the kind having a manually-operated gas injection tip is provided with a microcomputer system which operates a flow controller to precisely regulate gas flow rate to a test sample, and reads a pressure sensor which senses the pressure across the test sample. The microcomputer system automatically turns on the gas supply at the start of each measurement, senses when a steady-state is reached, collects and records pressure and flow rate data, and shuts off the gas supply immediately after the measurement is completed. Preferably temperature is also sensed to correct for changes in gas viscosity. The microcomputer system may also provide automatic zero-point adjustment, sensor calibration, over-range sensing, and may select controllers, sensors, and set-points for obtaining the most precise measurements. Electronic sensors may provide increased accuracy and precision. Preferably one microcomputer is used for sensing instrument control and data collection, and a second microcomputer is used which is dedicated to recording and processing the data, selecting the sensors and set-points for obtaining the most precise measurements, and instructing the user how to set-up and operate the minipermeameter. To provide mass data collection and user-friendly operation, the second microcomputer is preferably a lap-type portable microcomputer having a non-volatile or battery-backed CMOS memory.

Chandler, Mark A. (Madison, WI); Goggin, David J. (Austin, TX); Horne, Patrick J. (Austin, TX); Kocurek, Gary G. (Roundrock, TX); Lake, Larry W. (Austin, TX)

1989-01-01T23:59:59.000Z

413

REAL TIME SYSTEM OPERATIONS 2006-2007  

Science Conference Proceedings (OSTI)

The Real Time System Operations (RTSO) 2006-2007 project focused on two parallel technical tasks: (1) Real-Time Applications of Phasors for Monitoring, Alarming and Control; and (2) Real-Time Voltage Security Assessment (RTVSA) Prototype Tool. The overall goal of the phasor applications project was to accelerate adoption and foster greater use of new, more accurate, time-synchronized phasor measurements by conducting research and prototyping applications on California ISO's phasor platform - Real-Time Dynamics Monitoring System (RTDMS) -- that provide previously unavailable information on the dynamic stability of the grid. Feasibility assessment studies were conducted on potential application of this technology for small-signal stability monitoring, validating/improving existing stability nomograms, conducting frequency response analysis, and obtaining real-time sensitivity information on key metrics to assess grid stress. Based on study findings, prototype applications for real-time visualization and alarming, small-signal stability monitoring, measurement based sensitivity analysis and frequency response assessment were developed, factory- and field-tested at the California ISO and at BPA. The goal of the RTVSA project was to provide California ISO with a prototype voltage security assessment tool that runs in real time within California ISO?s new reliability and congestion management system. CERTS conducted a technical assessment of appropriate algorithms, developed a prototype incorporating state-of-art algorithms (such as the continuation power flow, direct method, boundary orbiting method, and hyperplanes) into a framework most suitable for an operations environment. Based on study findings, a functional specification was prepared, which the California ISO has since used to procure a production-quality tool that is now a part of a suite of advanced computational tools that is used by California ISO for reliability and congestion management.

Eto, Joseph H.; Parashar, Manu; Lewis, Nancy Jo

2008-08-15T23:59:59.000Z

414

On physical interpretation of two dimensional time-correlations regarding time delay velocities and eddy shaping  

SciTech Connect

Time delay estimation (TDE) techniques are frequently used to estimate the flow velocity from fluctuating measurements. Tilted structures carried by the flow lead to misinterpretation of the time delays in terms of velocity direction and amplitude. It affects TDE measurements from probes, and is also intrinsically important for beam emission spectroscopy and gas puff imaging measurements. Local eddy shapes estimated from 2D fluctuating field are necessary to gain a more accurate flow estimate from TDE, as illustrated by Langmuir probe array measurements. A least square regression approach is proposed to estimate both flow field and shaping parameters. The technique is applied to a test case built from numerical simulation of interchange fluctuations. The local eddy shape does not only provide corrections for the velocity field but also quantitative information about the statistical interaction mechanisms between local eddies and E Multiplication-Sign B flow shear. The technique is then tested on gaz puff imaging data collected at the edge of EAST tokamak plasmas. It is shown that poloidal asymmetries of the fluctuation fields-velocity and eddy shape-are consistent at least qualitatively with a ballooning type of turbulence immersed in a radially sheared equilibrium flow.

Fedorczak, N. [Center for Momentum Transport and Flow Organization, University of California at San Diego, San Diego, California 92093 (United States); CEA, IRFM, F-13108 Saint-Paul-Lez-Durance (France); Manz, P. [Center for Momentum Transport and Flow Organization, University of California at San Diego, San Diego, California 92093 (United States); Max-Planck-Institut feur Plasmaphysik, Association Euratom-IPP, 85748Garching (Germany); Thakur, S. C.; Xu, M.; Tynan, G. R. [Center for Momentum Transport and Flow Organization, University of California at San Diego, San Diego, California 92093 (United States); Xu, G. S.; Liu, S. C. [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China)

2012-12-15T23:59:59.000Z

415

Magnetic field survey at PG&E photovoltaic sites  

DOE Green Energy (OSTI)

Public awareness has aroused concerns over the possible effects of magnetic fields on human health. While research continues to determine if magnetic fields do, in fact, affect human health, concerned individuals are requesting data on magnetic field sources in their environments to base personal decisions about limiting their exposure to these sources. Timely acceptance and implementation of photovoltaics (PV), particularly for distributed applications such as PV rooftops, windows, and vehicles, may be hampered by the lack of PV magnetic field data. To address this situation, magnetic flux density was measured around equipment at two PVUSA (Photovoltaics for Utility Scale Applications) project sites in Kerman and Davis, California. This report documents the data and compares the PV magnetic fields with published data on more prevalent magnetic field sources. Although not comprehensive, electric and magnetic field (EMF) data taken at PVUSA indicate that 60-Hz magnetic fields (the EMF type of greatest public concern) are significantly less for PV arrays than for household applications. Therefore, given the present EMF research knowledge, PV array EMF may not merit considerable concern. The PV system components exhibiting significant AC magnetic fields are the transformers and power conditioning units (PCUs). However, the AC magnetic fields associated with these components are localized and are not detected at PV system perimeters. Concern about transformer and PCU EMF would apply to several generation and storage technologies.

Chang, G.J.; Jennings, C.

1994-08-01T23:59:59.000Z

416

Program or Field Office:  

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

site activities and seismic survey at Gnome-Coach Site, New Mexico. LM #01 site activities and seismic survey at Gnome-Coach Site, New Mexico. LM #01 -12 Location: Gnome-Coach Site, Eddy County, New Mexico Proposed Action or Project Description: The U.S. Department of Energy (DOE) is responsible for monitoring contaminant levels in groundwater from three groundwater monitoring wells at the Gnome-Coach, New Mexico, Site. Two of the wells contain elevated levels of radionuclides and these samples are managed in accordance with the DOE Investigation-Derived Waste Plan. Activities related to the groundwater monitoring program include installing water access tubes and obtaining water levels each time the wells are sampled. Some or all of the wells would have a new well box installed and/or the well head would be modified. The top well casing would be surveyed. A potential future action may include downloading transducers. DOE

417

Magnetic Fields in Population III Star Formation  

DOE Green Energy (OSTI)

We study the buildup of magnetic fields during the formation of Population III star-forming regions, by conducting cosmological simulations from realistic initial conditions and varying the Jeans resolution. To investigate this in detail, we start simulations from identical initial conditions, mandating 16, 32 and 64 zones per Jeans length, and studied the variation in their magnetic field amplification. We find that, while compression results in some amplification, turbulent velocity fluctuations driven by the collapse can further amplify an initially weak seed field via dynamo action, provided there is sufficient numerical resolution to capture vortical motions (we find this requirement to be 64 zones per Jeans length, slightly larger than, but consistent with previous work run with more idealized collapse scenarios). We explore saturation of amplification of the magnetic field, which could potentially become dynamically important in subsequent, fully-resolved calculations. We have also identified a relatively surprising phenomena that is purely hydrodynamic: the higher-resolved simulations possess substantially different characteristics, including higher infall-velocity, increased temperatures inside 1000 AU, and decreased molecular hydrogen content in the innermost region. Furthermore, we find that disk formation is suppressed in higher-resolution calculations, at least at the times that we can follow the calculation. We discuss the effect this may have on the buildup of disks over the accretion history of the first clump to form as well as the potential for gravitational instabilities to develop and induce fragmentation.

Turk, Matthew J.; Oishi, Jeffrey S.; Abel, Tom; Bryan, Greg

2012-02-22T23:59:59.000Z

418

Diagrammar in classical scalar field theory  

SciTech Connect

In this paper we analyze perturbatively a g{phi}{sup 4}classical field theory with and without temperature. In order to do that, we make use of a path-integral approach developed some time ago for classical theories. It turns out that the diagrams appearing at the classical level are many more than at the quantum level due to the presence of extra auxiliary fields in the classical formalism. We shall show that a universal supersymmetry present in the classical path-integral mentioned above is responsible for the cancelation of various diagrams. The same supersymmetry allows the introduction of super-fields and super-diagrams which considerably simplify the calculations and make the classical perturbative calculations almost 'identical' formally to the quantum ones. Using the super-diagrams technique, we develop the classical perturbation theory up to third order. We conclude the paper with a perturbative check of the fluctuation-dissipation theorem. - Highlights: > We provide the Feynman diagrams of perturbation theory for a classical field theory. > We give a super-formalism which links the quantum diagrams to the classical ones. > We check perturbatively the fluctuation-dissipation theorem.

Cattaruzza, E., E-mail: Enrico.Cattaruzza@gmail.com [Department of Physics (Miramare Campus), University of Trieste, Strada Costiera 11, Miramare-Grignano 34014, Trieste (Italy); Gozzi, E., E-mail: gozzi@ts.infn.it [Department of Physics (Miramare Campus), University of Trieste, Strada Costiera 11, Miramare-Grignano 34014, Trieste (Italy); INFN, Sezione di Trieste (Italy); Francisco Neto, A., E-mail: antfrannet@gmail.com [Departamento de Engenharia de Producao, Administracao e Economia, Escola de Minas, Campus Morro do Cruzeiro, UFOP, 35400-000 Ouro Preto MG (Brazil)

2011-09-15T23:59:59.000Z

419

Publications : Daylighting The New York Times Building  

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

Publications Publications Overview The architectural approach The owner's approach Daylighting field study Daylighting control systems Automated roller shades Procurement specifications Shades and Shade Controls Lighting Controls Visualizing daylight Commissioning/ verification Demand response Mainstream solutions Post-occupancy evaluation Publications Sponsors Project team Publications Technical Publications Post-occupancy Evaluation A post-occupancy monitored evaluation of the dimmable lighting, automated shading, and underfloor air distribution system in The New York Times Building. Eleanor S. Lee, Luis L. Fernandes, Brian Coffey, Andrew McNeil, Robert Clear, Tom Webster, Fred Bauman, Darryl Dickerhoff, David Heinzerling, Tyler Hoyt. LBNL Technical report, January 2013. LBNL-6023E.

420

Steam Field | Open Energy Information  

Open Energy Info (EERE)

Field Field Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Sanyal Temperature Classification: Steam Field Dictionary.png Steam Field: No definition has been provided for this term. Add a Definition Sanyal Temp Classification This temperature scheme was developed by Sanyal in 2005 at the request of DOE and GEA, as reported in Classification of Geothermal Systems: A Possible Scheme. Extremely Low Temperature Very Low Temperature Low Temperature Moderate Temperature High Temperature Ultra High Temperature Steam Field Steam field reservoirs are special cases where the fluid is predominantly found in a gas phase between 230°C to 240°C. "This special class of resource needs to be recognized, its uniqueness being the remarkably consistent initial temperature and pressure

Note: This page contains sample records for the topic "field time offset" 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

On the Time Reversal Invariance of Classical Electromagnetic Theory  

E-Print Network (OSTI)

David Albert claims that classical electromagnetic theory is not time reversal invariant. He acknowledges that all physics books say that it is, but claims they are "simply wrong" because they rely on an incorrect account of how the time reversal operator acts on magnetic fields. On that account, electric fields are left intact by the operator, but magnetic fields are inverted. Albert sees no reason for the asymmetric treatment, and insists that neither field should be inverted. I argue, to the contrary, that the inversion of magnetic fields makes good sense and is, in fact, forced by elementary geometric considerations. I also suggest a way of thinking about the time reversal invariance of classical electromagnetic theory -- one that makes use of the invariant four-dimensional formulation of the theory -- that makes no reference to magnetic fields at all. It is my hope that it will be of interest in its own right, Albert aside. It has the advantage that it allows for arbitrary curvature in the background spacetime structure, and is therefore suitable for the framework of general relativity. The only assumption one needs is temporal orientability.

David B. Malament

2003-12-18T23:59:59.000Z

422

Shape Dynamics and Effective Field Theory  

E-Print Network (OSTI)

Shape Dynamics is a gauge theory based on spatial diffeomorphism- and Weyl-invariance which is locally indistinguishable form classical General Relativity. If taken seriously, it suggests that the spacetime--geometry picture that underlies General Relativity can be replaced by a picture based on spatial conformal geometry. This classically well understood trading of gauge symmetries opens new conceptual avenues in many approaches to quantum gravity. I focus on the general implications for quantum gravity and effective field theory and consider the application of the Shape Dynamics picture in the exact renormalization group approaches to gravity, loop- and polymer- quantization approaches to gravity and low energy effective field theories. I also discuss the interpretation of known results through in the Shape Dynamics picture, in particular holographic renormalization and the problem of time in canonical quantum gravity.

Tim Koslowski

2013-05-07T23:59:59.000Z

423

Wireless Roadside Inspection Field Operations.pub  

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

Field Operational Test (FOT) Field Operational Test (FOT) Oak Ridge National Laboratory managed by UT-Battelle, LLC for the U.S. Department of Energy under Contract number DE-AC05-00OR22725 Research Areas Freight Flows Passenger Flows Supply Chain Efficiency Transportation: Energy Environment Safety Security Vehicle Technologies Research Brief T he U.S. Department of Transportation (DOT) Federal Motor Carrier Safety Administration (FMCSA) has commissioned the Wireless Roadside Inspection (WRI) Program to validate technologies and methodologies that can improve safety through inspections using wireless technologies that convey real-time identification of commercial vehicles, drivers, and carriers, as well as information about the status of the vehicles and their drivers. It is hypothesized that

424

K Basins Field Verification Program  

SciTech Connect

The Field Verification Program establishes a uniform and systematic process to ensure that technical information depicted on selected engineering drawings accurately reflects the actual existing physical configuration. This document defines the Field Verification Program necessary to perform the field walkdown and inspection process that identifies the physical configuration of the systems required to support the mission objectives of K Basins. This program is intended to provide an accurate accounting of the actual field configuration by documenting the as-found information on a controlled drawing.

Booth, H.W.

1994-12-02T23:59:59.000Z

425

Daylighting The New York Times Building  

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

Overview The architectural approach The owner's approach Daylighting field study Daylighting control systems Automated roller shades Procurement specifications Shades and Shade Controls Lighting Controls Visualizing daylight Commissioning/ verification Demand response Mainstream solutions Post-occupancy evaluation Publications Sponsors Project team NEW: Post-occupancy Evaluation Publications Daylighting The New York Times Headquarters Building This website provides information on a collaboration between The New York Times Company, the Lawrence Berkeley National Laboratory, industry, and three major public funding agencies designed to transform the market for emerging automated window shade systems and daylighting controls so that these types of energy-efficient products become the norm. Project activities included documenting and demonstrating that the technology works and generates energy savings in real world applications, creating a market response so that these systems are available at commodity prices and are cost-effective, making third party performance data available to the public, and providing guidance to support widespread deployment.

426

First-passage-time problems in time-aware networks  

E-Print Network (OSTI)

First passage time or the first time that a stochastic process crosses a boundary is a random variable whose probability distribution is sought in engineering, statistics, finance, and other disciplines. The probability ...

Suwansantisuk, Watcharapan, 1978-

2012-01-01T23:59:59.000Z

427

Magnetic response to applied electrostatic field in external magnetic field  

E-Print Network (OSTI)

We show, within QED and other possible nonlinear theories, that a static charge localized in a finite domain of space becomes a magnetic dipole, if it is placed in an external (constant and homogeneous) magnetic field in the vacuum. The magnetic moment is quadratic in the charge, depends on its size and is parallel to the external field, provided the charge distribution is at least cylindrically symmetric. This magneto-electric effect is a nonlinear response of the magnetized vacuum to an applied electrostatic field. Referring to a simple example of a spherically-symmetric applied field, the nonlinearly induced current and its magnetic field are found explicitly throughout the space, the pattern of lines of force is depicted, both inside and outside the charge, which resembles that of a standard solenoid of classical magnetostatics.

T. C. Adorno; D. M. Gitman; A. E. Shabad

2013-11-16T23:59:59.000Z

428

Conservation laws. Generation of physical fields. Principles of field theories  

E-Print Network (OSTI)

In the paper the role of conservation laws in evolutionary processes, which proceed in material systems (in material media) and lead to generation of physical fields, is shown using skew-symmetric differential forms. In present paper the skew-symmetric differential forms on deforming (nondifferentiable) manifolds were used in addition to exterior forms, which have differentiable manifolds as a basis. Such skew-symmetric forms (which were named evolutionary ones since they possess evolutionary properties), as well as the closed exterior forms, describe the conservation laws. But in contrast to exterior forms, which describe conservation laws for physical fields, the evolutionary forms correspond to conservation laws for material systems. The evolutionary forms possess an unique peculiarity, namely, the closed exterior forms are obtained from these forms. It is just this that enables one to describe the process of generation of physical fields, to disclose connection between physical fields and material systems and to resolve many problems of existing field theories.

L. I. Petrova

2007-04-19T23:59:59.000Z

429

NIST: A Walk Through Time - The "Atomic Age" of Time ...  

Science Conference Proceedings (OSTI)

... Transportation, communication, financial transactions, manufacturing, electric power and many ... The next generation of time standards is presently ...

2010-10-05T23:59:59.000Z

430

Temporal Velocity Variations beneath the Coso Geothermal Field Observed  

Open Energy Info (EERE)

Velocity Variations beneath the Coso Geothermal Field Observed Velocity Variations beneath the Coso Geothermal Field Observed using Seismic Double Difference Tomography of Compressional and Shear Wave Arrival Times Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Temporal Velocity Variations beneath the Coso Geothermal Field Observed using Seismic Double Difference Tomography of Compressional and Shear Wave Arrival Times Details Activities (1) Areas (1) Regions (0) Abstract: Microseismic imaging can be an important tool for characterizing geothermal reservoirs. Since microseismic sources occur more or less continuously both due to the operations of a geothermal field and the naturally occurring background seismicity, passive seismic monitoring is well suited to quantify the temporal variations in the vicinity of a

431

Primordial magnetic fields and formation of molecular hydrogen  

E-Print Network (OSTI)

We study the implications of primordial magnetic fields for the thermal and ionization history of the post-recombination era. In particular we compute the effects of dissipation of primordial magnetic fields owing to ambipolar diffusion and decaying turbulence in the intergalactic medium (IGM) and the collapsing halos and compute the effects of the altered thermal and ionization history on the formation of molecular hydrogen. We show that, for magnetic field strengths in the range $2 \\times 10^{-10} {\\rm G} \\la B_0 \\la 2 \\times 10^{-9} {\\rm G}$, the molecular hydrogen fraction in IGM and collapsing halo can increase by a factor 5 to 1000 over the case with no magnetic fields. We discuss the implication of the increased molecular hydrogen fraction on the radiative transfer of UV photons and the formation of first structures in the universe.

Shiv K Sethi; Biman B. Nath; Kandaswamy Subramanian

2008-04-22T23:59:59.000Z

432

Room-temperature electric-field controlled spin dynamics in ,,110... InAs quantum wells  

E-Print Network (OSTI)

Room-temperature electric-field controlled spin dynamics in ,,110... InAs quantum wells K. C. Halla pseudomagnetic fields exceeding 1 T when only 140 mV is applied across a single quantum well. Using this large­11 and the influence of the Rashba pseudomagnetic fields on the electron spin relaxation time in GaAs quantum wells

Flatte, Michael E.

433

Time-dependent simulations of filament propagation in photoconducting switches  

SciTech Connect

The authors present a model for investigating filamentary structures observed in laser-triggered photoswitches. The model simulates electrons and holes in two-dimensional cylindrical (r-z) geometry, with realistic electron and hole mobilities and field dependent impact ionization. Because of the large range of spatial and temporal scales to be resolved, they are using an explicit approach with fast, direct solution of the field equation. A flux limiting scheme is employed to avoid the time-step constraint due to the short time for resistive relaxation in the high density filament. Self-consistent filament propagation with speeds greater than the carrier drift velocity are observed in agreement with experiments.

Rambo, P.W.; Lawson, W.S. [Lawrence Livermore National Lab., CA (United States); Capps, C.D.; Falk, R.A. [Boeing Defense & Space Group, Seattle, WA (United States)

1994-05-01T23:59:59.000Z

434

Definition: Time-Domain Electromagnetics | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Time-Domain Electromagnetics Jump to: navigation, search Dictionary.png Time-Domain Electromagnetics Time-domain electromagnetic (TDEM) surveys are active-source soundings which provide information about the electrical structure of the shallow subsurface.[1] View on Wikipedia Wikipedia Definition Transient electromagnetics, (also time-domain electromagnetics / TDEM), is a geophysical exploration technique in which electric and magnetic fields are induced by transient pulses of electric current and the subsequent decay response measured. TEM / TDEM methods are generally able to determine subsurface electrical properties, but are also sensitive to subsurface magnetic properties in applications like UXO detection and

435

Accelerating Anisotropic Cosmologies in Brans-Dicke Gravity coupled to a Mass-Varying Vector Field  

E-Print Network (OSTI)

The field equations of Brans-Dicke gravity coupled to a mass-varying vector field are derived. Anisotropic cosmological solutions with a locally rotationally symmetric Bianchi type I metric and time-dependent scalar and electric vector fields are studied. A particular class of exact solutions for which all the variable parameters have a power-law time dependence is given. The universe expands with a constant expansion anisotropy within this class of solutions. We show that the accelerating expansion is driven by the scalar field and the electric vector field can be interpreted as an anisotropic dark-matter source.

Ozgur Akarsu; Tekin Dereli; Neslihan Oflaz

2013-11-11T23:59:59.000Z

436

THE DESIGN AND CONSTRUCTION OF MAGNETIC FIELDS FOR PLASMA RESEARCH  

SciTech Connect

The main problems arising during the design and con struction of medium size air-core electro-magnets are discussed. The basic equations are given relating magnetic field strength, magnetic field rise time, power input, electrodynamic forces, and thermal conditions e.g., allowable temperature rise to give the detailed dimensions required for the electrical conductor and the cooling annull. The details for a 25 kgauss sectional oil-cooled electromagnet for plasma research are described. (auth)

Gryzinski, M.; Sadowski, M.

1962-03-01T23:59:59.000Z

437

Charged string solutions with dilaton and modulus fields  

E-Print Network (OSTI)

We find charged, abelian, spherically symmetric solutions (in flat space-time) corresponding to the effective action of $D=4$ heterotic string theory with scale-dependent dilaton $\\p$ and modulus $\\vp$ fields. We take into account perturbative (genus-one), moduli-dependent `threshold' corrections to the coupling function $f(\\p,\\vp)$ in the gauge field kinetic term $f(\\p,\\vp) F^2_{\\m\

Cvetic, M

1994-01-01T23:59:59.000Z

438

Fast superconducting magnetic field switch  

DOE Patents (OSTI)

The superconducting magnetic switch or fast kicker magnet is employed with electron stream or a bunch of electrons to rapidly change the direction of flow of the electron stream or bunch of electrons. The apparatus employs a beam tube which is coated with a film of superconducting material. The tube is cooled to a temperature below the superconducting transition temperature and is subjected to a constant magnetic field which is produced by an external dc magnet. The magnetic field produced by the dc magnet is less than the critical field for the superconducting material, thus, creating a Meissner Effect condition. A controllable fast electromagnet is used to provide a magnetic field which supplements that of the dc magnet so that when the fast magnet is energized the combined magnetic field is now greater that the critical field and the superconducting material returns to its normal state allowing the magnetic field to penetrate the tube. This produces an internal field which effects the direction of motion and of the electron stream or electron bunch. The switch can also operate as a switching mechanism for charged particles.

Goren, Yehuda (Mountain View, CA); Mahale, Narayan K. (The Woodlands, TX)

1996-01-01T23:59:59.000Z

439

Fast superconducting magnetic field switch  

DOE Patents (OSTI)

The superconducting magnetic switch or fast kicker magnet is employed with an electron stream or a bunch of electrons to rapidly change the direction of flow of the electron stream or bunch of electrons. The apparatus employs a beam tube which is coated with a film of superconducting material. The tube is cooled to a temperature below the superconducting transition temperature and is subjected to a constant magnetic field which is produced by an external dc magnet. The magnetic field produced by the dc magnet is less than the critical field for the superconducting material, thus, creating a Meissner Effect condition. A controllable fast electromagnet is used to provide a magnetic field which supplements that of the dc magnet so that when the fast magnet is energized the combined magnetic field is now greater than the critical field and the superconducting material returns to its normal state allowing the magnetic field to penetrate the tube. This produces an internal field which effects the direction of motion and of the electron stream or electron bunch. The switch can also operate as a switching mechanism for charged particles. Magnetic switches and particularly fast kicker magnets are used in the accelerator industry to quickly deflect particle beams into and out of various transport lines, storage rings, dumps, and specifically to differentially route individual bunches of particles from a train of bunches which are injected or ejected from a given ring.

Goren, Y.; Mahale, N.K.

1995-12-31T23:59:59.000Z

440

Field observations and lessons learned  

SciTech Connect

This presentation outlines observations and lessons learned from the Megaports program. It provides: (1) details of field and technical observations collected during LANL field activities at ports around the world and details of observations collected during radiation detections system testing at Los Alamos National Laboratory; (2) provides suggestions for improvement and efficiency; and (3) discusses possible program execution changes for more effective operations.

Nielsen, Joh B [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "field time offset" 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

The Dynamics of an Electric Dipole Moment in a Stochastic Electric Field  

E-Print Network (OSTI)

The mean-field dynamics of an electric dipole moment in a deterministic and a fluctuating electric field is solved to obtain the average over fluctuations of the dipole moment and the angular mo- mentum as a function of time for a Gaussian white noise stochastic electric field. The components of the average electric dipole moment and the average angular momentum along the deterministic electric field direction do not decay to zero, despite fluctuations in all three components of the elec- tric field. This is in contrast to the decay of the average over fluctuations of a magnetic moment in a stochastic magnetic field with Gaussian white noise in all three components. The components of the average electric dipole moment and the average angular momentum perpendicular to the deterministic electric field direction oscillate with time but decay to zero, and their variance grows with time.

Band, Y B

2013-01-01T23:59:59.000Z

442

Comparison of Cellulose Ib Simulations with Three Carbohydrate Force Fields  

DOE Green Energy (OSTI)

Molecular dynamics simulations of cellulose have recently become more prevalent due to increased interest in renewable energy applications, and many atomistic and coarse-grained force fields exist that can be applied to cellulose. However, to date no systematic comparison between carbohydrate force fields has been conducted for this important system. To that end, we present a molecular dynamics simulation study of hydrated, 36-chain cellulose I{beta} microfibrils at room temperature with three carbohydrate force fields (CHARMM35, GLYCAM06, and Gromos 45a4) up to the near-microsecond time scale. Our results indicate that each of these simulated microfibrils diverge from the cellulose I{beta} crystal structure to varying degrees under the conditions tested. The CHARMM35 and GLYCAM06 force fields eventually result in structures similar to those observed at 500 K with the same force fields, which are consistent with the experimentally observed high-temperature behavior of cellulose I. The third force field, Gromos 45a4, produces behavior significantly different from experiment, from the other two force fields, and from previously reported simulations with this force field using shorter simulation times and constrained periodic boundary conditions. For the GLYCAM06 force field, initial hydrogen-bond conformations and choice of electrostatic scaling factors significantly affect the rate of structural divergence. Our results suggest dramatically different time scales for convergence of properties of interest, which is important in the design of computational studies and comparisons to experimental data. This study highlights that further experimental and theoretical work is required to understand the structure of small diameter cellulose microfibrils typical of plant cellulose.

Matthews, J. F.; Beckham, G. T.; Bergenstrahle, M.; Brady, J. W.; Himmel, M. E.; Crowley, M. F.

2012-02-14T23:59:59.000Z

443

Drift estimation from a simple field theory  

SciTech Connect

Given the outcome of a Wiener process, what can be said about the drift and diffusion coefficients? If the process is stationary, these coefficients are related to the mean and variance of the position displacements distribution. However, if either drift or diffusion are time-dependent, very little can be said unless some assumption about that dependency is made. In Bayesian statistics, this should be translated into some specific prior probability. We use Bayes rule to estimate these coefficients from a single trajectory. This defines a simple, and analytically tractable, field theory.

Mendes, F. M.; Figueiredo, A. [Instituto de Fisica, Universidade de Brasilia, CP: 04455, 70919-970-Brasilia (Brazil)

2008-11-06T23:59:59.000Z

444

EA-1336: Ocean Sequestration of Carbon Dioxide Field Experiment,  

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

336: Ocean Sequestration of Carbon Dioxide Field Experiment, 336: Ocean Sequestration of Carbon Dioxide Field Experiment, Pittsburgh, Pennsylvania EA-1336: Ocean Sequestration of Carbon Dioxide Field Experiment, Pittsburgh, Pennsylvania SUMMARY This EA evaluates the environmental impacts for the U.S. Department of Energy National Energy Technology Laboratory's proposal to participate with a group of international organizations in an experiment to evaluate the dispersion and diffusion of liquid carbon dioxide droplets in ocean waters. PUBLIC COMMENT OPPORTUNITIES None available at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD May 4, 2001 EA-1336: Finding of No Significant Impact Ocean Sequestration of Carbon Dioxide Field Experiment May 4, 2001 EA-1336: Final Environmental Assessment Ocean Sequestration of Carbon Dioxide Field Experiment

445

Field Mapping At Raft River Geothermal Area (1990) | Open Energy  

Open Energy Info (EERE)

Field Mapping At Raft River Geothermal Area (1990) Field Mapping At Raft River Geothermal Area (1990) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Field Mapping At Raft River Geothermal Area (1990) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Field Mapping Activity Date 1990 Usefulness not indicated DOE-funding Unknown Notes Together, field and 40Ar/39Ar results suggest that Late Cretaceous extension occurred in the Sevier belt hinterland at the same time as shortening in the eastern foreland and at depth in the hinterland. Sufficient topography must have been present to drive upper-crustal extension in the eastern hinterland. References Wells, M.L.; Allmendinger, R.W.; Dallmeyer, R.D. (1 October 1990) Late Cretaceous extension in the hinterland of the Sevier thrust belt,

446

Brownian dynamics of charged particles in a constant magnetic field  

SciTech Connect

Numerical algorithms are proposed for simulating the Brownian dynamics of charged particles in an external magnetic field, taking into account the Brownian motion of charged particles, damping effect, and the effect of magnetic field self-consistently. Performance of these algorithms is tested in terms of their accuracy and long-time stability by using a three-dimensional Brownian oscillator model with constant magnetic field. Step-by-step recipes for implementing these algorithms are given in detail. It is expected that these algorithms can be directly used to study particle dynamics in various dispersed systems in the presence of a magnetic field, including polymer solutions, colloidal suspensions, and, particularly, complex (dusty) plasmas. The proposed algorithms can also be used as thermostat in the usual molecular dynamics simulation in the presence of magnetic field.

Hou, L. J.; Piel, A. [IEAP, Christian-Albrechts Universitaet, D-24118 Kiel (Germany); Miskovic, Z. L. [Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario N2L 3G1 (Canada); Shukla, P. K. [Institut fuer Theoretische Physik IV, Ruhr-Universitaet Bochum, D-44780 Bochum (Germany)

2009-05-15T23:59:59.000Z

447

Beam Fields in an Integrated Cavity, Coupler and Window Configuration  

SciTech Connect

In a multi-bunch high current storage ring, beam generated fields couple strongly into the RF cavity coupler structure when beam arrival times are in resonance with cavity fields. In this study the integrated effect of beam fields over several thousand RF periods is simulated for the complete cavity, coupler, window and waveguide system of the PEP-II B-factory storage ring collider. We show that the beam generated fields at frequencies corresponding to several bunch spacings for this case gives rise to high field strength near the ceramic window which could limit the performance of future high current storage rings such as PEP-X or Super B-factories.

Weathersby, Stephen; Novokhatski, Alexander; /SLAC

2010-02-10T23:59:59.000Z

448

PYROTRON WITH TRANSLATIONAL CLOSURE FIELDS  

DOE Patents (OSTI)

Circuit means is described for effecting inward transla- ' tory motion of the intensified terminal reflector field regions of a magnetic mirror plasma containment field with a simultaneous intensification of the over-all field configuration. The circuit includes a segmented magnetic field generating solenoid and sequentially actuated switch means to consecutively short-circuit the solenoid segments and place charged capacitor banks in shunt with the segments in an appropriate correlated sequence such that electrical energy is transferred inwardly between adjacent segments from the opposite ends of the solenoid. The resulting magnetic field is effective in both radially and axially adiabatically compressing a plasma in a reaction chamber disposed concentrically within the solenoid. In addition, one half of the circuit may be employed to unidirectionally accelerate plasma. (AEC)

Hartwig, E.C.; Cummings, D.B.; Post, R.F.

1962-01-01T23:59:59.000Z

449

Low-magnetic-field magnetars  

E-Print Network (OSTI)

It is now widely accepted that soft gamma repeaters and anomalous X-ray pulsars are the observational manifestations of magnetars, i.e. sources powered by their own magnetic energy. This view was supported by the fact that these `magnetar candidates' exhibited, without exception, a surface dipole magnetic field (as inferred from the spin-down rate) in excess of the electron critical field (~4.4E+13 G). The recent discovery of fully-qualified magnetars, SGR 0418+5729 and Swift J1822.3-1606, with dipole magnetic field well in the range of ordinary radio pulsars posed a challenge to the standard picture, showing that a very strong field is not necessary for the onset of magnetar activity (chiefly bursts and outbursts). Here we summarize the observational status of the low-magnetic-field magnetars and discuss their properties in the context of the mainstream magnetar model and its main alternatives.

Turolla, R

2013-01-01T23:59:59.000Z

450

Compact orthogonal NMR field sensor  

DOE Patents (OSTI)

A Compact Orthogonal Field Sensor for emitting two orthogonal electro-magnetic fields in a common space. More particularly, a replacement inductor for existing NMR (Nuclear Magnetic Resonance) sensors to allow for NMR imaging. The Compact Orthogonal Field Sensor has a conductive coil and a central conductor electrically connected in series. The central conductor is at least partially surrounded by the coil. The coil and central conductor are electrically or electro-magnetically connected to a device having a means for producing or inducing a current through the coil and central conductor. The Compact Orthogonal Field Sensor can be used in NMR imaging applications to determine the position and the associated NMR spectrum of a sample within the electro-magnetic field of the central conductor.

Gerald, II, Rex E. (Brookfield, IL); Rathke, Jerome W. (Homer Glen, IL)

2009-02-03T23:59:59.000Z

451

NIST Time Scale Data Archive  

Science Conference Proceedings (OSTI)

NIST Time Scale Data Archive. Updated monthly. Return to Archive index Leap second and UT1-UTC information. This page ...

2013-08-07T23:59:59.000Z

452

Personalised time-dependent learning  

Science Conference Proceedings (OSTI)

Time-dependent instruction appears to shape next-generation learning systems, where the value of instruction is as important as the time it takes to learn. The ability to grasp the exact knowledge required to accomplish a specific task, in the ... Keywords: adaptive learning, authoring tools, knowledge management, learning granularity, learning objects, learning resources, learning technology, learning web, ontology, personalised learning, semantic web, time constraints, time-dependent learning, timeliness

R. Benlamri; Y. Atif; J. Berri

2009-04-01T23:59:59.000Z

453

Heat pipes for use in a magnetic field  

DOE Patents (OSTI)

A heat pipe configuration is described for use in a magnetic field environment of a fusion reactor. Heat pipes for operation in a magnetic field when liquid metal working fluids are used are optimized by flattening of the heat pipes having an unobstructed annulus which significantly reduces the adverse side region effect of the prior known cylindrically configured heat pipes. The flattened heat pipes operating in a magnetic field can remove 2 to 3 times the heat as a cylindrical heat pipe of the same cross sectional area.

Werner, R.W.; Hoffman, M.A.

1981-04-29T23:59:59.000Z

454

Cold Black Holes in the Einstein-Scalar Field System  

E-Print Network (OSTI)

We study Einstein gravity coupled to a massless scalar field in a static spherically symmetric space-time in four dimensions. Black hole solutions exist when the kinetic energy of the scalar field is negative, that is, for a phantom field. These “scalar black holes ” have an infinite horizon area and zero temperature. They are related through a conformal transformation with similar objects in the Jordan frames of scalar-tensor theories of gravity. The thermodynamical properties of these solutions are discussed. It is proved that any static, spherically symmetric black holes with an infinite horizon area have zero Hawking temperature.

K. A. Bronnikov; J. C. Fabris; N. Pinto-neto; M. E. Rodrigues; Icra-cbpf Rua Xavier Sigaud

2008-01-01T23:59:59.000Z

455

Cold Black Holes in the Einstein-Scalar Field System  

E-Print Network (OSTI)

We study Einstein gravity coupled to a massless scalar field in a static spherically symmetric space-time in four dimensions. Black hole solutions exist when the kinetic energy of the scalar field is negative, that is, for a phantom field. These ``scalar black holes'' have an infinite horizon area and zero temperature. They are related through a conformal transformation with similar objects in the Jordan frames of scalar-tensor theories of gravity. The thermodynamical properties of these solutions are discussed. It is proved that any \\ssph \\bhs with an infinite horizon area have zero Hawking temperature.

K. A. Bronnikov; J. C. Fabris; N. Pinto-Neto; M. E. Rodrigues

2006-04-11T23:59:59.000Z

456

Interaction between phantom field and modified Chaplygin gas  

E-Print Network (OSTI)

In this letter, we have considered a flat FRW universe. Instead of considering only one candidate for dark energy, we have considered interaction between phantom field and modified Chaplygin gas. It has been shown that the potential of the phantom field increases from a lower value with evolution of the Universe. It has been observed that, the field has an increasing tendency and potential has also an increasing tendency with passage of cosmic time. In the evolution of the universe the crossing of $w=-1$ has been realized by this interacting model.

Surajit Chattopadhyay; Ujjal Debnath

2010-12-27T23:59:59.000Z

457

Heat pipes for use in a magnetic field  

DOE Patents (OSTI)

A heat pipe configuration for use in a magnetic field environment of a fusion reactor is disclosed. Heat pipes for operation in a magnetic field when liquid metal working fluids are used are optimized by flattening of the heat pipes having an unobstructed annulus which significantly reduces the adverse side region effect of the prior known cylindrically configured heat pipes. The flattened heat pipes operating in a magnetic field can remove 2--3 times the heat as a cylindrical heat pipe of the same cross sectional area. 4 figs.

Werner, R.W.; Hoffman, M.A.

1983-07-19T23:59:59.000Z

458

Estimating of pulsed electric fields using optical measurements.  

SciTech Connect

We performed optical electric field measurements ion nanosecond time scales using the electrooptic crystal beta barium borate (BBO). Tests were based on a preliminary bench top design intended to be a proofofprinciple stepping stone towards a modulardesign optical Efield diagnostic that has no metal in the interrogated environment. The long term goal is to field a modular version of the diagnostic in experiments on large scale xray source facilities, or similarly harsh environments.

Flanagan, Timothy McGuire; Chantler, Gary R.

2013-09-01T23:59:59.000Z

459

Energy momentum flows for the massive vector field  

E-Print Network (OSTI)

We present a causal trajectory interpretation for the massive vector field, based on the flows of rest energy and a conserved density defined using the time-like eigenvectors and eigenvalues of the stress-energy-momentum tensor. This work extends our previous work which used a similar procedure for the scalar field. The massive, spin-one, complex vector field is discussed in detail and solutions are classified using the Pauli-Lubanski spin vector. The flows of energy-momentum are illustrated in a simple example of standing waves in a plane.

George Horton; Chris Dewdney

2006-09-26T23:59:59.000Z

460

Heat pipes for use in a magnetic field  

DOE Patents (OSTI)

A heat pipe configuration for use in a magnetic field environment of a fusion reactor. Heat pipes for operation in a magnetic field when liquid metal working fluids are used are optimized by flattening of the heat pipes having an unobstructed annulus which significantly reduces the adverse side region effect of the prior known cylindrically configured heat pipes. The flattened heat pipes operating in a magnetic field can remove 2--3 times the heat as a cylindrical heat pipe of the same cross sectional area.

Werner, Richard W. (San Ramon, CA); Hoffman, Myron A. (Davis, CA)

1983-01-01T23:59:59.000Z

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


461

A NEAR-INFRARED SPECTROSCOPIC STUDY OF YOUNG FIELD ULTRACOOL DWARFS  

SciTech Connect

We present a near-infrared (0.9-2.4 {mu}m) spectroscopic study of 73 field ultracool dwarfs having spectroscopic and/or kinematic evidence of youth ( Almost-Equal-To 10-300 Myr). Our sample is composed of 48 low-resolution (R Almost-Equal-To 100) spectra and 41 moderate-resolution spectra (R {approx}> 750-2000). First, we establish a method for spectral typing M5-L7 dwarfs at near-IR wavelengths that is independent of gravity. We find that both visual and index-based classification in the near-IR provides consistent spectral types with optical spectral types, though with a small systematic offset in the case of visual classification at J and K band. Second, we examine features in the spectra of {approx}10 Myr ultracool dwarfs to define a set of gravity-sensitive indices based on FeH, VO, K I, Na I, and H-band continuum shape. We then create an index-based method for classifying the gravities of M6-L5 dwarfs that provides consistent results with gravity classifications from optical spectroscopy. Our index-based classification can distinguish between young and dusty objects. Guided by the resulting classifications, we propose a set of low-gravity spectral standards for the near-IR. Finally, we estimate the ages corresponding to our gravity classifications.

Allers, K. N. [Department of Physics and Astronomy, Bucknell University, Lewisburg, PA 17837 (United States); Liu, Michael C., E-mail: k.allers@bucknell.edu [Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States)

2013-08-01T23:59:59.000Z

462

Abandoned oil fields in Kansas and Nebraska  

SciTech Connect

Data on approximately 400 abandoned oil fields in Kansas and 90 abandoned oil fields in Nebraska are presented. The following information is obtained on each field: county; DOE field code; field name; AAPG geologic province code; discovery date; year of last production; discovery well operator; proven acreage; formation thickness; depth of field; API gravity; calendar year; yearly field oil production; yearly field gas production; cumulative oil production; cumulative gas production; number abandoned fields in county; cumulative production of oil from fields; and cumulative production of gas from fields. (DMC)

Not Available

1982-12-01T23:59:59.000Z

463

H -mode behavior induced by cross-field currents in a tokamak  

DOE Green Energy (OSTI)

A sharp transport barrier, accompanied by a bifurcated poloidal rotation and a radial electric field, is formed at the plasma edge by driving a radial current across the outer magnetic surfaces of a tokamak. A decrease in particle transport is observed for negative radial {ital E} fields. When the radial current is turned off, the {ital E} field and the rotation damp on a time scale comparable with the ion-ion collision time.

Taylor, R.J.; Brown, M.L.; Fried, B.D.; Grote, H.; Liberati, J.R.; Morales, G.J.; Pribyl, P. (Institute for Plasma and Fusion Research, University of California, Los Angeles, California 90024 (USA)); Ono, M. (Princeton Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543 (USA))

1989-11-20T23:59:59.000Z

464

Using Narrow and Wide Field of View Instruments to Evaluate Longwave Parameterizations for Fair Weather Cumulus Cloud Fields  

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

Using Narrow and Wide Field of View Instruments to Using Narrow and Wide Field of View Instruments to Evaluate Longwave Parameterizations for Fair Weather Cumulus Cloud Fields E. E. Takara and R. G. Ellingson Department of Meteorology Florida State University Tallahassee, Florida Introduction Full blown three-dimensional (3D) radiation calculations for broken cloud fields consume too much time and computing resources to be included in climate models. The 3D effects can be approximated by effective cloud fractions which reduce the three-dimensional calculation to an average of plane parallel solutions - a much easier problem. For broken cloud conditions, the longwave flux (F) can be written as the weighted average of clear and overcast fluxes: overcast e clear e F N )F N 1 ( F (1) F clear is the clear-sky flux; the flux that would occur if the broken cloud field was removed. F

465

The LCLS Timing Event System  

Science Conference Proceedings (OSTI)

The Linac Coherent Light Source requires precision timing trigger signals for various accelerator diagnostics and controls at SLAC-NAL. A new timing system has been developed that meets these requirements. This system is based on COTS hardware with a mixture of custom-designed units. An added challenge has been the requirement that the LCLS Timing System must co-exist and 'know' about the existing SLC Timing System. This paper describes the architecture, construction and performance of the LCLS timing event system.

Dusatko, John; Allison, S.; Browne, M.; Krejcik, P.; /SLAC

2012-07-23T23:59:59.000Z

466

ARM - Field Campaign - Precision Gas Sampling (PGS) Validation Field  

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

govCampaignsPrecision Gas Sampling (PGS) Validation Field Campaign govCampaignsPrecision Gas Sampling (PGS) Validation Field Campaign Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Precision Gas Sampling (PGS) Validation Field Campaign 2003.04.02 - 2003.09.02 Lead Scientist : Marc Fischer For data sets, see below. Description Ecosystem-atmosphere exchange of carbon, water, and energy varies with climate, soil, and land management, in ways 1) that influence the CO2 flux and planetary boundary layer CO2 concentration in ARM CART and 2) that we can model and predict. This activity repeated portable flux system measurements that we performed in spring 2002, by continuing measurements of the spatial heterogeneity of carbon, water, and energy fluxes in fields surrounding the ARM SGP Central Facility (CF).

467

ARM - Field Campaign - Remote Cloud Sensing (RCS) Field Evaluation  

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

love to hear from you Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Remote Cloud Sensing (RCS) Field Evaluation 1994.04.01 - 1994.05.31 Lead Scientist :...

468

ARM - Field Campaign - Remote Cloud Sensing (RCS) Field Evaluation  

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

love to hear from you Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Remote Cloud Sensing (RCS) Field Evaluation 1995.04.01 - 1995.05.31 Lead Scientist :...

469

Time  

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

Judges 9:00- 9:25 Materials Science Mathew Cherukara Shock Induced Chemistry of NiAl Nano-Composites Chen, X. Gyrya, V. 9:25- 9:50 Materials Science Christian Sorensen Explosive...

470

Impact of Extended Daylight Saving Time on National Energy Consumption Report to Congress  

SciTech Connect

The Energy Policy Act of 2005 (Pub. L. No. 109-58; EPAct 2005) amended the Uniform Time Act of 1966 (Pub. L. No. 89-387) to increase the portion of the year that is subject to Daylight Saving Time. (15 U.S.C. 260a note) EPAct 2005 extended the duration of Daylight Saving Time in the spring by changing its start date from the first Sunday in April to the second Sunday in March, and in the fall by changing its end date from the last Sunday in October to the first Sunday in November. (15 U.S.C. 260a note) EPAct 2005 also called for the Department of Energy to evaluate the impact of Extended Daylight Saving Time on energy consumption in the United States and to submit a report to Congress. (15 U.S.C. 260a note) This report presents the results of impacts of Extended Daylight Saving Time on the national energy consumption in the United States. The key findings are: (1) The total electricity savings of Extended Daylight Saving Time were about 1.3 Tera Watt-hour (TWh). This corresponds to 0.5 percent per each day of Extended Daylight Saving Time, or 0.03 percent of electricity consumption over the year. In reference, the total 2007 electricity consumption in the United States was 3,900 TWh. (2) In terms of national primary energy consumption, the electricity savings translate to a reduction of 17 Trillion Btu (TBtu) over the spring and fall Extended Daylight Saving Time periods, or roughly 0.02 percent of total U.S. energy consumption during 2007 of 101,000 TBtu. (3) During Extended Daylight Saving Time, electricity savings generally occurred over a three- to five-hour period in the evening with small increases in usage during the early-morning hours. On a daily percentage basis, electricity savings were slightly greater during the March (spring) extension of Extended Daylight Saving Time than the November (fall) extension. On a regional basis, some southern portions of the United States exhibited slightly smaller impacts of Extended Daylight Saving Time on energy savings compared to the northern regions, a result possibly due to a small, offsetting increase in household air conditioning usage. (4) Changes in national traffic volume and motor gasoline consumption for passenger vehicles in 2007 were determined to be statistically insignificant and therefore, could not be attributed to Extended Daylight Saving Time.

Belzer, D. B.; Hadley, S. W.; Chin, S-M.

2008-10-01T23:59:59.000Z

471

Dynamic Phase Transitions In The Spin-2 Ising System Under An Oscillating Magnetic Field Within The Effective-Field Theory  

SciTech Connect

The dynamic phase transitions are studied in the spin-2 Ising model under a time-dependent oscillating magnetic field by using the effective-field theory with correlations. The effective-field dynamic equation is derived by employing the Glauber transition rates and the phases in the system are obtained by solving this dynamic equation. The nature (first- or second-order) of the dynamic phase transition is characterized by investigating the thermal behavior of the dynamic order parameter and the dynamic phase transition temperatures are obtained. The dynamic phase diagrams are presented in (T/zJ, h/zJ) plane.

Ertas, Mehmet; Keskin, Mustafa [Department of Physics, Erciyes University, 38039 Kayseri (Turkey); Deviren, Bayram [Department of Physics, Nevsehir University, 50300 Nevsehir (Turkey)

2010-12-23T23:59:59.000Z

472

Demand Shifting With Thermal Mass in Large Commercial Buildings: Field Tests, Simulation and Audits  

E-Print Network (OSTI)

The Role of Thermal Mass on the Cooling Load of Buildings.Use of Building Thermal Mass to Offset Cooling Loads. ASHRAEpeak hours, storing cooling in the building thermal mass and

Xu, Peng; Haves, Philip; Piette, Mary Ann; Zagreus, Leah

2005-01-01T23:59:59.000Z

473

Vector-field domain walls  

Science Conference Proceedings (OSTI)

We argue that spontaneous Lorentz violation may generally lead to metastable domain walls related to the simultaneous violation of some accompanying discrete symmetries. Remarkably, such domain-wall solutions exist for spacelike Lorentz violation and do not exist for the timelike violation. Because a preferred space direction is spontaneously induced, these domain walls have no planar symmetry and produce a peculiar static gravitational field at small distances, while their long-distance gravity appears the same as for regular scalar-field walls. Some possible applications of vector-field domain walls are briefly discussed.

Chkareuli, J. L. [E. Andronikashvili Institute of Physics, 0177 Tbilisi, Georgia (United States); I. Chavchavadze State University, 0162 Tbilisi (Georgia); Kobakhidze, Archil [E. Andronikashvili Institute of Physics, 0177 Tbilisi (Georgia); School of Physics, University of Melbourne, Victoria 3010 (Australia); Volkas, Raymond R. [School of Physics, University of Melbourne, Victoria 3010 (Australia)

2009-09-15T23:59:59.000Z

474

Measurements of magnetic field alignment  

Science Conference Proceedings (OSTI)

The procedure for installing Superconducting Super Collider (SSC) dipoles in their respective cryostats involves aligning the average direction of their field with the vertical to an accuracy of 0.5 mrad. The equipment developed for carrying on these measurements is described and the measurements performed on the first few prototypes SSC magnets are presented. The field angle as a function of position in these 16.6 m long magnets is a characteristic of the individual magnet with possible feedback information to its manufacturing procedure. A comparison of this vertical alignment characteristic with a magnetic field intensity (by NMR) characteristic for one of the prototypes is also presented. 5 refs., 7 figs.

Kuchnir, M.; Schmidt, E.E.

1987-11-06T23:59:59.000Z

475

Quantum field theory without divergences  

E-Print Network (OSTI)

It is shown that loop divergences emerging in the Green functions in quantum field theory originate from correspondence of the Green functions to {\\em unmeasurable} (and hence unphysical) quantities. This is because no physical quantity can be measured in a point, but in a region, the size of which is constrained by the resolution of measuring equipment. The incorporation of the resolution into the definition of quantum fields $\\phi(x)\\to\\phi^{(A)}(x)$ and appropriate change of Feynman rules results in finite values of the Green functions. The Euclidean $\\phi^4$-field theory is taken as an example.

Altaisky, M V

2010-01-01T23:59:59.000Z

476

Quantum field theory without divergences  

E-Print Network (OSTI)

It is shown that loop divergences emerging in the Green functions in quantum field theory originate from correspondence of the Green functions to {\\em unmeasurable} (and hence unphysical) quantities. This is because no physical quantity can be measured in a point, but in a region, the size of which is constrained by the resolution of measuring equipment. The incorporation of the resolution into the definition of quantum fields $\\phi(x)\\to\\phi^{(A)}(x)$ and appropriate change of Feynman rules results in finite values of the Green functions. The Euclidean $\\phi^4$-field theory is taken as an example.

M. V. Altaisky

2010-02-12T23:59:59.000Z

477

All Time, All the Time: Improving NIST Radio  

Science Conference Proceedings (OSTI)

... need for manual adjustments when Daylight Saving Time begins and ends, and allowing automatic resetting of clocks following a power outage.

2011-10-06T23:59:59.000Z

478

A Time Bucket Formulation for the TSP with Time Windows  

E-Print Network (OSTI)

Nov 5, 2009 ... Abstract: The Traveling Salesman Problem with Time Windows (TSPTW) is the problem of finding a minimum-cost path visiting a set of cities ...

479

NIST: A Walk Through Time - World Time Scales  

Science Conference Proceedings (OSTI)

... A Walk Through Time - Home Page ... and technologists recognized the inadequacy of timekeeping based on the motion of the Earth, which fluctuates ...

2010-10-05T23:59:59.000Z

480

Electromagnetic polarizabilities: Lattice QCD in background fields  

Science Conference Proceedings (OSTI)

Chiral perturbation theory makes definitive predictions for the extrinsic behavior of hadrons in external electric and magnetic fields. Near the chiral limit, the electric and magnetic polarizabilities of pions, kaons, and nucleons are determined in terms of a few well-known parameters. In this limit, hadrons become quantum mechanically diffuse as polarizabilities scale with the inverse square-root of the quark mass. In some cases, however, such predictions from chiral perturbation theory have not compared well with experimental data. Ultimately we must turn to first principles numerical simulations of QCD to determine properties of hadrons, and confront the predictions of chiral perturbation theory. To address the electromagnetic polarizabilities, we utilize the background field technique. Restricting our attention to calculations in background electric fields, we demonstrate new techniques to determine electric polarizabilities and baryon magnetic moments for both charged and neutral states. As we can study the quark mass dependence of observables with lattice QCD, the lattice will provide a crucial test of our understanding of low-energy QCD, which will be timely in light of ongoing experiments, such as at COMPASS and HI gamma S.

W. Detmold, B.C. Tiburzi, A. Walker-Loud

2012-04-01T23:59:59.000Z