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1

Review of James Hartley's research on structured abstracts  

Science Conference Proceedings (OSTI)

Structured abstracts have been employed in biomedical journals for more than 20 years. Professor James Hartley in the School of Psychology, Keele University, UK has published over 25 research papers and conducted systematic studies on structured abstracts. ... Keywords: James Hartley, structured abstracts

Chunfang Zhang; Xueli Liu

2011-12-01T23:59:59.000Z

2

Enhanced frequency pattern of the 2-D Hartley transform for a new crop-resilient image transform  

Science Conference Proceedings (OSTI)

In this paper, some modifications are introduced to the Original Hartley Transform (OHT) in an attempt to increase the resistance of the OHT against the cropping attack. The unique frequency pattern of the OHT triggered the proposed modifications, where ...

Ayman M. T. Ahmed

2010-01-01T23:59:59.000Z

3

LCA Harmonization  

Open Energy Info (EERE)

Loading... Loading... About Box & Whisker Scatter Data References Publications Definitions definitions LCA Harmonization The Life Cycle Assessment (LCA) Harmonization project systematically reviewed estimates of life cycle GHG emissions from electricity generation technologies published between 1970 and 2010. LCAs consider emissions from all stages in the life cycle of an electricity generation technology, from component manufacturing, to operation of the generation facility to its decommissioning, and including acquisition, processing and transport of any required fuels. For selected technologies, a meta-analytical procedure called "harmonization" was applied to adjust estimates so that they were methodologically more consistent and therefore more comparable. This

4

Harmonic engine  

Science Conference Proceedings (OSTI)

A high efficiency harmonic engine based on a resonantly reciprocating piston expander that extracts work from heat and pressurizes working fluid in a reciprocating piston compressor. The engine preferably includes harmonic oscillator valves capable of oscillating at a resonant frequency for controlling the flow of working fluid into and out of the expander, and also preferably includes a shunt line connecting an expansion chamber of the expander to a buffer chamber of the expander for minimizing pressure variations in the fluidic circuit of the engine. The engine is especially designed to operate with very high temperature input to the expander and very low temperature input to the compressor, to produce very high thermal conversion efficiency.

Bennett, Charles L. (Livermore, CA)

2009-10-20T23:59:59.000Z

5

A Distribution of Large Particles in the Coma of Comet 103P/Hartley 2  

E-Print Network (OSTI)

The coma of comet 103P/Hartley 2 has a significant population of large particles observed as point sources in images taken by the Deep Impact spacecraft. We measure their spatial and flux distributions, and attempt to constrain their composition. The flux distribution of these particles implies a very steep size distribution with power-law slopes ranging from -6.6 to -4.7. The radii of the particles extend up to 20 cm, and perhaps up to 2 m, but their exact sizes depend on their unknown light scattering properties. We consider two cases: bright icy material, and dark dusty material. The icy case better describes the particles if water sublimation from the particles causes a significant rocket force, which we propose as the best method to account for the observed spatial distribution. Solar radiation is a plausible alternative, but only if the particles are very low density aggregates. If we treat the particles as mini-nuclei, we estimate they account for <16-80% of the comet's total water production rate (...

Kelley, Michael S; Bodewits, Dennis; A'Hearn, Michael F; Lisse, Carey M; Kolokolova, Ludmilla; Kissel, Jochen; Hermalyn, Brendan; 10.1016/j.icarus.2012.09.037

2013-01-01T23:59:59.000Z

6

Harmonizing Above Code Codes  

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

Harmonizing "Above Code" Harmonizing "Above Code" Codes Doug Lewin Executive Director, SPEER 6 Regional Energy Efficiency Organizations SPEER Members Texas grid facing an energy crisis * No new generation coming online * Old, inefficient coal-fired plants going offline * ERCOT CEO Trip Doggett said "We are very concerned about the significant drop in the reserve margin...we will be very tight on capacity next summer and have a repeat of this year's emergency procedures and conservation appeals." Higher codes needed to relieve pressure Building Codes are forcing change * 2012 IECC 30% higher than 2006 IECC * IRC, the "weaker code," will mirror IECC in 2012 * City governments advancing local codes with

7

Harmonic generation at high intensities  

Science Conference Proceedings (OSTI)

Atomic electrons subject to intense laser fields can absorb many photons, leading either to multiphoton ionization or the emission of a single, energetic photon which can be a high multiple of the laser frequency. The latter process, high-order harmonic generation, has been observed experimentally using a range of laser wavelengths and intensities over the past several years. Harmonic generation spectra have a generic form: a steep decline for the low order harmonics, followed by a plateau extending to high harmonic order, and finally an abrupt cutoff beyond which no harmonics are discernible. During the plateau the harmonic production is a very weak function of the process order. Harmonic generation is a promising source of coherent, tunable radiation in the XUV to soft X-ray range which could have a variety of scientific and possibly technological applications. Its conversion from an interesting multiphoton phenomenon to a useful laboratory radiation source requires a complete understanding of both its microscopic and macroscopic aspects. We present some recent results on the response of single atoms at intensities relevant to the short pulse experiments. The calculations employ time-dependent methods, which we briefly review in the next section. Following that we discuss the behavior of the harmonics as a function of laser intensity. Two features are notable: the slow scaling of the harmonic intensities with laser intensity, and the rapid variation in the phase of the individual harmonics with respect to harmonic order. We then give a simple empirical formula that predicts the extent of the plateau for a given ionization potential, wavelength and intensity.

Schafer, K.J.; Krause, J.L.; Kulander, K.C.

1993-06-01T23:59:59.000Z

8

LCA Harmonization | Open Energy Information  

Open Energy Info (EERE)

LCA Harmonization LCA Harmonization Jump to: navigation, search Tool Summary LAUNCH TOOL Name: LCA Harmonization Agency/Company /Organization: NREL Sector: Energy Focus Area: Greenhouse Gas Phase: Evaluate Options, Prepare a Plan Resource Type: Online calculator User Interface: Website Website: en.openei.org/apps/LCA/ Web Application Link: en.openei.org/apps/LCA/ Cost: Free OpenEI Keyword(s): Featured References: Background and Reflections on the Life Cycle Assessment Harmonization Project[1] National Renewable Energy Laboratory[2] The LCA Harmonization project systematically reviewed estimates of life cycle GHG emissions from electricity generation technologies published between 1970 and 2010. This application (app) allows for customized visualization of summary statistics and the underlying published estimates

9

Patent Harmonization: Creating Uniform Patent Laws  

Science Conference Proceedings (OSTI)

Patent Harmonization: Creating Uniform Patent Laws. David V. Radack. You may have seen or heard the phrase "patent harmonization" used when discussing...

10

Harmonic oscillator and nuclear pseudospin  

Science Conference Proceedings (OSTI)

A generalized relativistic harmonic oscillator for spin 1/2 particles is studied. The Dirac Hamiltonian contains a scalar S and a vector V quadratic potentials in the radial coordinate

Ronai Lisboa; Manuel Malheiro; Antonio S. de Castro; Pedro Alberto; Manuel Fiolhais

2004-01-01T23:59:59.000Z

11

Analyzing harmonic monitoring data using data mining  

Science Conference Proceedings (OSTI)

Harmonic monitoring has become an important tool for harmonic management in distribution systems. A comprehensive harmonic monitoring program has been designed and implemented on a typical electrical MV distribution system in Australia. The monitoring ... Keywords: classification, clustering, data mining, harmonics, monitoring system, power quality, segmentation

Ali Asheibi; David Stirling; Danny Soetanto

2006-11-01T23:59:59.000Z

12

Harmonic analysis of electrical distribution systems  

SciTech Connect

This report presents data pertaining to research on harmonics of electric power distribution systems. Harmonic data is presented on RMS and average measurements for determination of harmonics in buildings; fluorescent ballast; variable frequency drive; georator geosine harmonic data; uninterruptible power supply; delta-wye transformer; westinghouse suresine; liebert datawave; and active injection mode filter data.

1996-03-01T23:59:59.000Z

13

Asymmetric Gaussian harmonic steering in second harmonic generation  

E-Print Network (OSTI)

We show that intracavity second harmonic generation can be a source of asymmetric Gaussian harmonic steering, which is adjustable by tuning the cavity loss rates at the fundamental and harmonic frequencies. Working in the semi-classical regime where the cavity is pumped at less than the self-pulsing intensity, we find that whether quantum steering is available via the standard measurements of the Einstein-Podolsky-Rosen correlations can depend on which quadrature measurements are inferred from output spectral measurements of the fundamental and the harmonic. Altering the ratios of the cavity loss rates can be used to tune the regions where symmetric steering is or is not available, with the results becoming asymmetric over all frequencies as the cavity damping at the fundamental frequency becomes significantly greater than that at the harmonic. This asymmetry and its functional dependence on frequency is a potential new tool for experimental quantum information science, with possible utility for quantum key distribution. Although we show the effect here for Gaussian measurements of the quadratures, and cannot rule out a return of the steering symmetry for some class of non-Gaussian measurements, we note here that the system obeys Gaussian statistics in the operating regime investigated and Gaussian inference is at least as accurate as any other method for calculating the necessary correlations.

M. K. Olsen

2013-08-20T23:59:59.000Z

14

Fermion Quasi-Spherical Harmonics  

E-Print Network (OSTI)

Spherical Harmonics, $Y_\\ell^m(\\theta,\\phi)$, are derived and presented (in a Table) for half-odd-integer values of $\\ell$ and $m$. These functions are eigenfunctions of $L^2$ and $L_z$ written as differential operators in the spherical-polar angles, $\\theta$ and $\\phi$. The Fermion Spherical Harmonics are a new, scalar and angular-coordinate-dependent representation of fermion spin angular momentum. They have $4\\pi$ symmetry in the angle $\\phi$, and hence are not single-valued functions on the Euclidean unit sphere; they are double-valued functions on the sphere, or alternatively are interpreted as having a double-sphere as their domain.

G. Hunter; P. Ecimovic; I. Schlifer; I. M. Walker; D. Beamish; S. Donev; M. Kowalski; S. Arslan; S. Heck

1998-10-02T23:59:59.000Z

15

Prony analysis for power system transient harmonics  

Science Conference Proceedings (OSTI)

Proliferation of nonlinear loads in power systems has increased harmonic pollution and deteriorated power quality. Not required to have prior knowledge of existing harmonics, Prony analysis detects frequencies, magnitudes, phases, and especially damping ...

Li Qi; Lewei Qian; Stephen Woodruff; David Cartes

2007-01-01T23:59:59.000Z

16

The (n+1)-dimensional Harmonic Oscillator - CECM  

E-Print Network (OSTI)

The (n+1)-dimensional harmonic oscillator equation is of the form: i $\\displaystyle \\phi_{t}^{}$ = $\\displaystyle \

17

NREL: Energy Analysis: Life Cycle Assessment Harmonization  

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

Life Cycle Assessment Harmonization Life Cycle Assessment Harmonization Life cycle assessment (LCA) harmonization helps lenders, utility executives, and lawmakers get the best, most precise information on greenhouse gas emissions from various sources of energy. LCA has been used to estimate and compare GHG emissions from utility-scale power systems for three decades, often with considerable variability in results. Harmonization provides more exact estimates of greenhouse-gas emissions for renewable and conventional electricity generation technologies, clarifying inconsistent and conflicting estimates in the published literature and reducing uncertainty. Highlights of Recent Studies Chart that compares published and harmonized lifecycle greenhouse gas emissions. For help reading this chart, please contact the webmaster.

18

Harmonization of Federal and International Regulations | Department...  

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

and International Regulations Update of the U.S. Department of Transportation (DOT) Pipeline and Hazardous Materials Safety Administration (PHMSA). Harmonization of Federal and...

19

Improving Clinical Laboratory Testing through Harmonization ...  

Science Conference Proceedings (OSTI)

... involvement in harmonizing this category of clinical laboratory testing procedures. ... patients at risk from non-standardized laboratory test results and ...

2013-05-21T23:59:59.000Z

20

Impact of stray capacitance on hvdc harmonics  

SciTech Connect

Recent experience suggests that a new approach is needed to determining harmonic generation from hvdc converters for the purpose of telephone interference evaluation. This paper presents simulation results showing the effect on harmonic generation of stray capacitances inherent to hvdc converters. These simulation results illustrate the basic characteristics of the phenomenon, which agree qualitatively with field experience.

Larsen, E.V.; Sublich, M.; Kapoor, S.C.

1989-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hartley harmon oldham" 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

Building Technologies Office: Harmonization of Wireless Dimming Lighting  

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

Harmonization of Harmonization of Wireless Dimming Lighting Controls Research Project to someone by E-mail Share Building Technologies Office: Harmonization of Wireless Dimming Lighting Controls Research Project on Facebook Tweet about Building Technologies Office: Harmonization of Wireless Dimming Lighting Controls Research Project on Twitter Bookmark Building Technologies Office: Harmonization of Wireless Dimming Lighting Controls Research Project on Google Bookmark Building Technologies Office: Harmonization of Wireless Dimming Lighting Controls Research Project on Delicious Rank Building Technologies Office: Harmonization of Wireless Dimming Lighting Controls Research Project on Digg Find More places to share Building Technologies Office: Harmonization of Wireless Dimming Lighting Controls Research Project on

22

Harmonization of Federal and International Regulations  

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

DOT/PHMSA DOT/PHMSA Update Michael Conroy U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration Office of Hazardous Materials Safety Radioactive Materials - 2 - HM-230 (1/26/04) Harmonized with 2000 Version of IAEA's 1996 Edition - 3 - Changes to the IAEA Regulations Since 2000 2003 Amendment 2005 Edition 2009 Edition U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration Harmonization Rulemaking (HM-250) * Harmonize with 2009 Edition of TS-R-1 * Miscellaneous Other Fixes - Update, clarify, correct, or provide relief from certain regulatory requirements * DOT and NRC will both issue rulemakings - DOT NPRM Issued August 12, 2011 - NRC NPRM coming soon

23

NREL: Energy Analysis - Life Cycle Assessment Harmonization  

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

Life Cycle Assessment Harmonization Life Cycle Assessment Harmonization Life Cycle Greenhouse Gas Emissions from Electricity Generation (Fact Sheet) Cover of the Life Cycle Greenhouse Gas Emissions from Electricity Generation factsheet Download the Fact Sheet The U.S. Department of Energy enlisted NREL to review and "harmonize" life cycle assessments (LCA) of electricity generation technologies. Hundreds of assessments have been published, often with considerable variability in results. These variations in approach, while usually legitimate, hamper comparison across studies and pooling of published results. Learn more about life cycle assessments of energy technologies. By harmonizing this data, NREL seeks to reduce the uncertainty around estimates for environmental impacts of renewables and increase the value of

24

Second Harmonic Resonance for Equatorial Waves  

Science Conference Proceedings (OSTI)

Simple, exact analytical conditions for second harmonic resonance between equatorial waves are derived. Such resonance can occur only between two Rossby waves or two westward travelling gravity waves. It is shown that regardless of whether the ...

John P. Boyd

1983-03-01T23:59:59.000Z

25

Dual aperture dipole magnet with second harmonic component  

DOE Patents (OSTI)

An improved dual aperture dipole electromagnet includes a second-harmonic frequency magnetic guide field winding which surrounds first harmonic frequency magnetic guide field windings associated with each aperture. The second harmonic winding and the first harmonic windings cooperate to produce resultant magnetic waveforms in the apertures which have extended acceleration and shortened reset portions of electromagnet operation.

Praeg, Walter F. (Palos Park, IL)

1985-01-01T23:59:59.000Z

26

Dual aperture dipole magnet with second harmonic component  

DOE Patents (OSTI)

An improved dual aperture dipole electromagnet includes a second-harmonic frequency magnetic guide field winding which surrounds first harmonic frequency magnetic guide field windings associated with each aperture. The second harmonic winding and the first harmonic windings cooperate to produce resultant magnetic waveforms in the apertures which have extended acceleration and shortened reset portions of electromagnet operation.

Praeg, W.F.

1983-08-31T23:59:59.000Z

27

Oldham County, Texas: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

6°, -102.6216211° 6°, -102.6216211° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.4247226,"lon":-102.6216211,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

28

Oldham County, Kentucky: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

5.4788065° 5.4788065° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":38.3560025,"lon":-85.4788065,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

29

Harmonic Analysis Errors in Calculating Dipole,  

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

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

30

High harmonic phase in molecular nitrogen  

SciTech Connect

Electronic structure in atoms and molecules modulates the amplitude and phase of high harmonic generation (HHG). We report measurements of the high harmonic spectral amplitude and phase in N{sub 2}. The phase is measured interferometrically by beating the N{sub 2} harmonics with those of an Ar reference oscillator in a gas mixture. A rapid phase shift of 0.2{pi} is observed in the vicinity of the HHG spectral minimum, where a shift of {pi} had been presumed [J. Itatani et al., Nature 432, 867 (2004)]. We compare the phase measurements to a simulation of the HHG recombination step in N{sub 2} that is based on a simple interference model. The results of the simulation suggest that modifications beyond the simple interference model are needed to explain HHG spectra in molecules.

McFarland, Brian K.

2009-10-17T23:59:59.000Z

31

A nonlinear approach to harmonic signal modeling  

Science Conference Proceedings (OSTI)

Periodic signals can be estimated recursively by exploiting the fact that a sine wave passing through a static nonlinear function generates a spectrum of overtones. A real wave with unknown period in cascade with a piecewise linear function is thefefore ... Keywords: Wiener model structure, frequency estimation, harmonic modeling, local convergence, recursive identification

Emad Abd-Elrady

2004-01-01T23:59:59.000Z

32

Nonequilibrium thermodynamics of a squeezed harmonic oscillator  

E-Print Network (OSTI)

We consider the thermodynamic properties of the squeezed vacuum state of a frequency--modulated quantum harmonic oscillator. We analytically relate the squeezing parameter to the irreversible work and the degree of nonadiabaticity of the frequency transformation. We furthermore determine the optimal modulation that leads to maximal squeezing, and discuss its implementation as well as the detection of squeezing in single cold ion traps.

Fernando Galve; Eric Lutz

2008-11-18T23:59:59.000Z

33

PRE-SW Grid-IQ Harmonics Evaluation Module - Prototype  

Science Conference Proceedings (OSTI)

The application provides a user-friendly interface that would be used to perform harmonic analysis such as conducting frequency scans and harmonic distortion analysis by allowing user to select the ...

2012-09-04T23:59:59.000Z

34

Analysis of inverter models and harmonic propagation. Part II. Harmonic propagation  

SciTech Connect

Part II of a three part study describes the harmonic propagation in the photovoltaic power system consisting of the solar cell array, the inverter, and the ac side of the inverter up to the infinite bus of the utility. Propagation of the harmonics in the utility system are not addressed. Two main problems are analyzed: power in the converter system and harmonics of the current and voltage waveforms of the single-phase, dependent inverter. Relationships between the different components of the converter power - active, reactive and disturbance - are discussed. All formulas necessary for calculating the power components are given, assuming the harmonics of the current and voltage waveforms are known. The theoretical and experimental investigation of the single-phase, dependent inverter is described. The ac and dc terminal voltage of the inverter are analyzed and their harmonics are obtained. These data determine the harmonic propagation on both the dc and ac sides and may be useful for equipment design. Part I of the study (SAND 7040/1) contains a detailed description of the microcomputer based simulator that represents the output characteristics of the five commercially available types of solar cell arrays under different environmental conditions, and Part III (SAND 7040/3) presents an analysis of the transient and steady-state processes of inverter modules.

Slonim, M.A.; Stanek, E.K.

1984-09-01T23:59:59.000Z

35

Selective compensation of voltage harmonics in grid-connected microgrids  

E-Print Network (OSTI)

1 Selective compensation of voltage harmonics in grid-connected microgrids Mehdi Savaghebia , Juan is proposed for selective compensation of main voltage harmonics in a grid- connected microgrid. The aim level. Keywords Distributed Generator (DG); microgrid; grid-connected; voltage harmonics compensation. 1

Vasquez, Juan Carlos

36

Harmonized Emissions Analysis Tool (HEAT) | Open Energy Information  

Open Energy Info (EERE)

Harmonized Emissions Analysis Tool (HEAT) Harmonized Emissions Analysis Tool (HEAT) Jump to: navigation, search Tool Summary Name: Harmonized Emissions Analysis Tool (HEAT) Agency/Company /Organization: Local Governments for Sustainability Sector: Energy, Land Topics: Co-benefits assessment, - Health, GHG inventory, Implementation, Pathways analysis Resource Type: Software/modeling tools User Interface: Website Complexity/Ease of Use: Moderate Website: www.environmenttools.co.uk/directory/tool/name/harmonized-emissions-an Cost: Free Harmonized Emissions Analysis Tool (HEAT) Screenshot References: ICLEI-HEAT[1] Related Tools Energy Forecasting Framework and Emissions Consensus Tool (EFFECT) Prospective Outlook on Long-Term Energy Systems (POLES) ICCT Roadmap Model ... further results Find Another Tool

37

Harmon, Illinois: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Harmon, Illinois: Energy Resources Harmon, Illinois: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 41.719689°, -89.556564° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":41.719689,"lon":-89.556564,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

38

Harmon Electric Assn Inc | Open Energy Information  

Open Energy Info (EERE)

Harmon Electric Assn Inc Harmon Electric Assn Inc Place Oklahoma Utility Id 8183 Utility Location Yes Ownership C NERC Location SPP NERC SPP Yes Activity Distribution Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png 100 Watt HPS Lighting 175 Watt MVL Lighting Co-Generation Rider Commercial Commercial, Single-Phase Commercial Commercial, Three-Phase Commercial Controllable Irrigation, 101HP or more Commercial Controllable Irrigation, 10HP or Less Commercial Controllable Irrigation, 11 to 25 HP Commercial Controllable Irrigation, 26 to 75 HP Commercial Controllable Irrigation, 76 to 100 HP Commercial

39

Regional Cooperation and Harmonization on EESL  

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

Regional Cooperation and Regional Cooperation and Harmonization on EESL LI Tienan Professor Director of Center for Industrial Energy Efficiency (CIEE) Chairman of ISO/TC 257 Energy Savings 国宏美亚(北京)工业节能减排技术促进中心 Center for Industrial Energy Efficiency (CIEE) 国宏美亚(北京)工业节能减排技术促进中心 Center for Industrial Energy Efficiency (CIEE) Roles of EESL Regional EESL Cooperation and Harmonization Focus and Barriers Best Practice: BRESL Project Recommendations Contents 国宏美亚(北京)工业节能减排技术促进中心 Center for Industrial Energy Efficiency (CIEE) 国宏美亚(北京)工业节能减排技术促进中心 Center for Industrial Energy Efficiency (CIEE)

40

Honeycomb optical lattices with harmonic confinement  

SciTech Connect

We consider the fate of the Dirac points in the spectrum of a honeycomb optical lattice in the presence of a harmonic confining potential. By numerically solving the tight binding model, we calculate the density of states and find that the energy dependence can be understood from analytical arguments. In addition, we show that the density of states of the harmonically trapped lattice system can be understood by application of a local density approximation based on the density of states in the homogeneous lattice. The Dirac points are found to survive locally in the trap as evidenced by the local density of states. Furthermore, they give rise to a distinct spatial profile of a noninteracting Fermi gas.

Block, J. Kusk; Nygaard, N. [Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C (Denmark); Lundbeck Foundation Theoretical Center for Quantum System Research, Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C (Denmark)

2010-05-15T23:59:59.000Z

Note: This page contains sample records for the topic "hartley harmon oldham" 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

Truncated channel representations for coupled harmonic oscillators  

E-Print Network (OSTI)

Coupled quantum harmonic oscillators, studied by many authors using many different techniques over the decades, are frequently used toy-models to study open quantum systems. In this manuscript, we explicitly study the simplest oscillator model -- a pair of initially decoupled quantum harmonic oscillators interacting with a spring-like coupling, where the bath oscillator is initially in a thermal-like state. In particular, we treat the completely positive and trace preserving map on the system as a quantum channel, and study the truncation of the channel by truncating its Kraus set and its output dimension. We thereby derive the truncated transition amplitudes of the corresponding truncated channel. Finally, we give a computable approximation for these truncated transition amplitudes with explicit error bounds, and perform a case study of the oscillators in the off-resonant and weakly-coupled regime numerically. We demonstrate explicitly that the substantial leakage error can be mitigated via quantum error correction.

Yingkai Ouyang; Wee Hao Ng

2013-01-19T23:59:59.000Z

42

Heat transport in active harmonic chains  

SciTech Connect

We show that a harmonic lattice model with amplifying and attenuating elements, when coupled to two thermal baths, exhibits unique heat transport properties. Some of these novel features include anomalous nonequilibrium steady-state heat currents, negative differential thermal conductance, as well as nonreciprocal heat transport. We find that when these elements are arranged in a PT-symmetric manner, the domain of existence of the nonequilibrium steady state is maximized. We propose an electronic experimental setup based on resistive-inductive-capacitive (RLC) transmission lines, where our predictions can be tested.

Zheng, Mei C.; Ellis, Fred M.; Kottos, Tsampikos; Fleischmann, Ragnar; Geisel, Theo; Prosen, Tomaz [Department of Physics, Wesleyan University, Middletown, Connecticut 06459 (United States); Max-Planck-Institute for Dynamics and Self-organization, Am Fassberg 17, D-37077 Goettingen (Germany) and Institute for Nonlinear Dynamics, Department of Physics, University of Goettingen, D-37077 Goettingen (Germany); Physics Department, Faculty of Mathematics and Physics, University of Ljubljana, Ljubljana (Slovenia)

2011-08-15T23:59:59.000Z

43

Separation of High Order Harmonics with Fluoride Windows  

SciTech Connect

The lower orders produced in high order harmonic generation can be effciently temporally separated into monochromatic pulses by propagation in a Fluoride window while still preserving their femtosecond pulse duration. We present calculations for MgF2, CaF2, and LiF windows for the third, fifth, and seventh harmonics of 800 nm. We demonstrate the use of this simple and inexpensive technique in a femtosecond pump/probe experiment using the fifth harmonic.

Allison, Tom; van Tilborg, Jeroen; Wright, Travis; Hertlein, Marcus; Falcone, Roger; Belkacem, Ali

2010-08-02T23:59:59.000Z

44

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

45

Harmonizing Global Metrics for Data Center Energy Efficiency...  

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

Harmonizing Global Metrics for Data Center Energy Efficiency The United States of America, European Union and Japan Reach Agreement on Guiding Principles for Data Center Energy...

46

CERTS 2012 Program Review - IEEE-IEC Harmonization - Ken Martin...  

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

Harmonization Kenneth Martin martin@electricpowergroup.com June 12-13, 2012 Washington, DC OE Transmission Reliability Peer Review 1 Introduction Synchrophasor measurement...

47

Spectral Phase Distribution Retrieval through Coherent Control of Harmonic Generation  

SciTech Connect

The temporal intensity distribution of the third harmonic of a Ti:sapphire laser generated in Xe gas is fully reconstructed from its spectral phase and amplitude distributions. The spectral phases are retrieved by cross correlating the fundamental laser frequency field with that of the third harmonic, in a three laser versus one harmonic photon coupling scheme. The third harmonic spectral amplitude distribution is extracted from its field autocorrelation. The measured pulse duration is found to be in agreement with that expected from lowest order perturbation theory both for unstretched and chirped pulses.

Papalazarou, E.; Charalambidis, D. [Foundation for Research and Technology - Hellas, Institute of Electronic Structure and Laser, PO Box 1527, GR711 10 Heraklion (Crete) (Greece); Department of Physics, University of Crete, PO Box 2208, GR71003 Heraklion (Crete) (Greece); Kovacev, M.; Tzallas, P.; Benis, E.P.; Kalpouzos, C. [Foundation for Research and Technology - Hellas, Institute of Electronic Structure and Laser, PO Box 1527, GR711 10 Heraklion (Crete) (Greece); Tsakiris, G. D. [Max-Planck-Institut fuer Quantenoptik, D-85748 Garching (Germany)

2006-04-28T23:59:59.000Z

48

Harmonizing Global Metrics for Data Center Energy Efficiency...  

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

Harmonizing Global Metrics for Data Center Energy Efficiency, February 2, 2010 Secondary menu About us Press room Contact Us Portfolio Manager Login Facility owners and managers...

49

Generation of even harmonics in coupled quantum dots  

Science Conference Proceedings (OSTI)

Using the spatial-temporal symmetry principle we developed recently, we propose an effective scheme for even-harmonics generation in coupled quantum dots. The relative intensity of odd and even harmonic components in the emission spectrum can be controlled by tuning the dipole couplings among the dots, which can be realized in experiments by careful design of the nanostructures. In particular, pure 2nth harmonics and (2n+1)th harmonics (where n is an integer) can be generated simultaneously with polarizations in two mutual perpendicular directions in our systems. An experimental design of the coupled dots system is presented.

Guo Shifang; Duan Suqing; Yang Ning; Chu Weidong; Zhang Wei [Institute of Applied Physics and Computational Mathematics, P.O. Box 8009, Beijing 100088 (China)

2011-07-15T23:59:59.000Z

50

Analysis of Harmonic Distortion Levels in Commercial Buildings  

Science Conference Proceedings (OSTI)

This case study describes harmonic distortion concerns for commercial buildings and presents a method for evaluating these concerns based on typical load characteristics.

2003-12-31T23:59:59.000Z

51

Effects of Power System Harmonics on Distribution Transformer Insulation Performance.  

E-Print Network (OSTI)

??Floating feeder resonances are one of the new challenges being put forward by the renewable energy based distributed generation (DG) installations. Generally, the harmonic injection (more)

Hamid, Muhammad

2011-01-01T23:59:59.000Z

52

Energy Savings and Efficiency Improvements through Harmonic Mitigation  

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

harmful harmonics from electrical distribution systems supporting high quantities of computers and other related office equipment. The proliferation of computer and other office...

53

Solving two-mode squeezed harmonic oscillator and $k$th-order harmonic generation in Bargmann-Hilbert spaces  

E-Print Network (OSTI)

We analyze the two-mode squeezed harmonic oscillator and the $k$th-order harmonic generation within the framework of Bargmann-Hilbert spaces of entire functions. For the displaced, single-mode squeezed and two-mode squeezed harmonic oscillators, we derive the exact, closed-form expressions for their energies and wave functions. For the $k$th-order harmonic generation with $k\\geq 3$, our result indicates that it does not have eigenfunctions and is thus ill-defined in the Bargmann-Hilbert space.

Yao-Zhong Zhang

2013-04-15T23:59:59.000Z

54

Wind Farm Structures' Impact on Harmonic Emission and Grid Interaction  

E-Print Network (OSTI)

1 Wind Farm Structures' Impact on Harmonic Emission and Grid Interaction Lukasz Hubert Kocewiak, Jesper Hjerrild, Claus Leth Bak ABSTRACT HE impact of a wind farm's internal structures on harmonic in this paper. The largest wind farms in the world, Horns Rev 2 Offshore Wind Farm and Polish Karnice Onshore

Bak, Claus Leth

55

Motor voltage high harmonics influence to efficient energy usage  

Science Conference Proceedings (OSTI)

Analysis of the effect of non-sinusoidal voltages on the three-phase induction motor is presented in the paper. When the induction motors are supplied by a rectangular shape of the voltage inverter with high levels of harmonic voltage (Uh,i ... Keywords: energy efficiency, harmonics, induction motor, non-sinusoidal voltage, power losses

Miloje M. Kostic; Branka B. Kostic

2011-07-01T23:59:59.000Z

56

Cerenkov third-harmonic generation in ,,2... nonlinear photonic crystal  

E-Print Network (OSTI)

Cerenkov third-harmonic generation in ,,2... nonlinear photonic crystal Yan Sheng,1,a Wenjie Wang,1 of Cerenkov emission of a third-harmonic frequency in a two-dimensional nonlinear photonic crystal, where coherent light called Cerenkov radiation.1 In this process, the mol- ecules of the medium are polarized

Arie, Ady

57

ENERGY DIFFUSION IN HARMONIC SYSTEM WITH CONSERVATIVE NOISE  

E-Print Network (OSTI)

ENERGY DIFFUSION IN HARMONIC SYSTEM WITH CONSERVATIVE NOISE GIADA BASILE AND STEFANO OLLA Abstract. We prove diffusive behaviour of the energy fluctua- tions in a system of harmonic oscillators with a stochastic pertur- bation of the dynamics that conserves energy and momentum. The results concern pinned

58

Higher order harmonic detection for exploring nonlinear interactions  

SciTech Connect

Nonlinear dynamics underpin a vast array of physical phenomena ranging from interfacial motion to jamming transitions. In many cases, decoupling the contributions of competing or co-existing mechanisms to the system response can be achieved through investigation of higher order harmonics. Here, a method using band excitation scanning probe microscopy to investigate higher order harmonics of the electromechanical response, with nanometer scale spatial resolution is presented. The utility of the technique is demonstrated by probing the first three harmonics of strain for a well-known system, a model Pb(Zr1-xTix)O3 ferroelectric capacitor. It is shown that the second order harmonic response is correlated with the first harmonic response, whereas the third harmonic is not. Additionally, nanoscale measurements of the second harmonic response with field reveal significant deviations from Rayleigh-type models in the form of a much more complicated field dependence than is observed in the spatially averaged data. These results illustrate the versatility of combining proximal probe techniques with nth harmonic detection methods in exploring and decoupling nonlinear dynamics in a wide variety of nanoscale materials.

Vasudevan, Rama K [ORNL; Okatan, M. B. [University of New South Wales; Rajapaksa, Indrajit [Oak Ridge National Laboratory (ORNL); Kim, Yunseok [ORNL; Marincel, Dan [Materials Science and Engineering, Pennsylvania State University; Trolier-McKinstry, Susan [Pennsylvania State University; Jesse, Stephen [ORNL; Nagarajan, Valanoor [University of New South Wales; Kalinin, Sergei V [ORNL

2013-01-01T23:59:59.000Z

59

Harmonizing Global Metrics for Data Center Efficiency  

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

Page 1 Page 1 Harmonizing Global Metrics for Data Center Energy Efficiency Global Taskforce Reaches Agreement on Measurement Protocols for PUE - Continues Discussion of Additional Energy Efficiency Metrics February 28th, 2011 The data center has become an increasingly important part of most business operations in the twenty-first century. With escalating demand and rising energy prices, it is essential for the owners and operators of these mission critical facilities to assess and improve their performance with energy efficiency metrics. However, even with the global presence of many companies, these metrics are often not applied consistently at a global level. To address these inconsistencies, a group of global leaders has been meeting regularly to agree

60

Spectrum of second-harmonic radiation generated from incoherent light  

SciTech Connect

We report on the development of the theory of second-harmonic generation by an incoherent pump with broad angular and frequency spectra. We show that spatial as well as temporal walk-off effects in a nonlinear crystal result in angular dispersion of the second-harmonic radiation. We demonstrate that the acceptance angle in second-harmonic generation by incoherent light is caused by the width of the pump angular spectrum and the resulting angular dispersion of second-harmonic radiation but does not depend on crystal length. In this case the frequency spectrum of second-harmonic radiation is determined by its angular dispersion and the pump angular spectrum. The theory is supported by an experiment in which a LiIO{sub 3} crystal was pumped by a tungsten halogen lamp.

Stabinis, A.; Pyragaite, V.; Tamosauskas, G.; Piskarskas, A. [Department of Quantum Electronics, Vilnius University, Sauletekio Avenue 9, Building 3, LT-10222 Vilnius (Lithuania)

2011-10-15T23:59:59.000Z

Note: This page contains sample records for the topic "hartley harmon oldham" 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

Relativistic high harmonic generation in gas jet targets  

SciTech Connect

We experimentally demonstrate a new regime of high-order harmonic generation by relativistic-irradiance lasers in gas jet targets. Bright harmonics with both odd and even orders, generated by linearly as well as circularly polarized pulses, are emitted in the forward direction, while the base harmonic frequency is downshifted. A 9 TW laser generates harmonics up to 360 eV, within the 'water window' spectral region. With a 120 TW laser producing 40 uJ/sr per harmonic at 120 eV, we demonstrate the photon number scalability. The observed harmonics cannot be explained by previously suggested scenarios. A novel high-order harmonics generation mechanism [T. Zh. Esirkepov et al., AIP Proceedings, this volume], which explains our experimental findings, is based on the phenomena inherent in the relativistic laser - underdense plasma interactions (self-focusing, cavity evacuation, and bow wave generation), mathematical catastrophe theory which explains formation of electron density singularities (cusps), and collective radiation due to nonlinear oscillations of a compact charge.

Pirozhkov, A.S.; Kando, M.; Esirkepov, T.Zh.; and others

2012-07-11T23:59:59.000Z

62

Harmonic measurements from a group connected generator HVdc converter scheme  

SciTech Connect

A recent CIGRE document published in ELECTRA has described the potential benefits of a direct connection of generators to HVdc converters. While many theoretical contributions have been made, no practical test data has become available so far. This paper reports on harmonic tests carried out at the Benmore end of the New Zealand HVdc link operating as a group connected scheme. It was found that the measured harmonic current levels were well below specified generator ratings. Dynamic simulation accurately predicted the harmonic currents whereas the results of a steady state formulation were less reliable.

Macdonald, S.J.; Enright, W.; Arrillaga, J. [Univ. of Canterbury, Christchurch (New Zealand); O`Brien, M.T.

1995-10-01T23:59:59.000Z

63

Harmonization of Wireless Dimming Lighting Control | Department of Energy  

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

Harmonization of Wireless Dimming Lighting Harmonization of Wireless Dimming Lighting Control Harmonization of Wireless Dimming Lighting Control The U.S. Department of Energy (DOE) is currently conducting research into the harmonization of ZigBee, BACnet-or building automation and control network-and DALI-or digital addressable lighting interface-systems in wireless dimming lighting controls. Four proposed modules will enable "plug-and-play" capabilities for all DALI-compatible controls and BACnet-compatible systems. Project Description This project seeks to develop "plug-and-play" capabilities for lighting as an integrated component of a whole-building control system. Verified Energy, LLC, attempts to demonstrate the benefits of implementing wireless control in dimming applications using plug-and-play principles.

64

Ontario Harmonization Getting Ready! Issues for University of Western Ontario  

E-Print Network (OSTI)

first province to harmonize! -British Columbia ·12% HST (July 1, 2010) ·Adopted model similar to Ontario supplied by means of · Wire, pipeline or similar conduit · Satellite or other telecommunications facility

Ma, Bin

65

Conversion efficiency, scaling and global optimization of high harmonic generation  

E-Print Network (OSTI)

Closed form expressions for the high harmonic generation (HHG) conversion efficiency in the plateau and cut-off region are derived showing agreement with previous observations. Application of these results to optimal ...

Falcao-Filho, Edilson L.

66

Femtosecond second-harmonic generation in periodically poled lithium niobate  

E-Print Network (OSTI)

Femtosecond second-harmonic generation in periodically poled lithium niobate waveguides poled lithium niobate waveguides under large conversion conditions. Strong saturation of the SHG detailed experi- mental data on femtosecond SHG in periodically poled lithium niobate (PPLN) waveguides

Purdue University

67

Using Coupled Harmonic Oscillators to Model Some Greenhouse Gas Molecules  

Science Conference Proceedings (OSTI)

Common greenhouse gas molecu les SF 6 NO 2 CH 4 and CO 2 are modeled as harmonic oscillators whose potential and kinetic energies are derived. Using the Euler?Lagrange equation

Clark Kendrick C. Go; Joel T. Maquiling

2010-01-01T23:59:59.000Z

68

Separation of High Order Harmonics with Fluoride Windows  

E-Print Network (OSTI)

Harmonics with Fluoride Windows T. K. Allison, 1,2? J. vanpropagation in a ?uoride window while still preserving theirfor MgF 2 , CaF 2 , and LiF windows for the third, ?fth, and

Allison, Tom

2010-01-01T23:59:59.000Z

69

Transient beam loading in the ALS harmonic RF system  

E-Print Network (OSTI)

TRANSIENT BEAM LOADING IN THE ALS HARMONIC RF SYSTEM * J.as the Advanced Light Source (ALS), with moderately low beamharmonic RF system on the ALS storage ring consisting of 5

2000-01-01T23:59:59.000Z

70

Absorption of ion Bernstein waves by impurity cyclotron harmonics  

DOE Green Energy (OSTI)

This paper analyzes the damping of externally-launched ion Bernstein waves by absorption at the cyclotron harmonics of the impurity ions. The inclusion of the non-magnetic energy flux term reduces the damping rate by nearly two orders of magnitude from the previous calculation. Excessive impurity damping can be avoided by launching ion Bernstein waves at a frequency just below the second (or higher) cyclotron harmonic of hydrogen.

Ono, M.

1982-05-01T23:59:59.000Z

71

Wind LCA Harmonization (Fact Sheet), NREL (National Renewable Energy Laboratory)  

DOE Green Energy (OSTI)

NREL recently led the Life Cycle Assessment (LCA) Harmonization Project, a study that provides more exact estimates of GHG emissions for renewable and conventional generation, clarifying inconsistent and conflicting estimates in the published literature, and reducing uncertainty. This involved a systematic review and harmonization of life cycle assessment (LCA) literature of utility-scale wind power systems in order to determine the causes of life cycle greenhouse gases (GHG) emissions and, where possible, reduce variability in GHG estimates.

Not Available

2013-06-01T23:59:59.000Z

72

Debunching into a bucket of lower harmonic number  

SciTech Connect

The adiabatic debunching of beam from buckets of higher harmonic number into waiting buckets of lower harmonic number is a critical step in the current scheme of operation for Tev I. The optimum choice of rf system parameters for this ''bunch coalescing'' process is not immediately obvious. In this note two examples are presented along with generalizations based upon them and experience with the Tevatron I design which can simplify the selection of appropriate parameters for different conditions.

MacLachlan, J.A.; Griffin, J.E.

1987-12-09T23:59:59.000Z

73

Efficient hybrid shunt active power filter for improvement of power factor and harmonic suppression using MATLAB  

Science Conference Proceedings (OSTI)

Power quality management is the main problem that the industry is facing today. This is mainly affected by the generation of harmonics. The growing use of electronic equipment produces a large amount of harmonics in distribution systems because of non-sinusoidal ... Keywords: MATLAB 7.6, harmonic suppression, hybrid filter, power quality, shunt active power filter, total harmonic distortion

Jarupula Somlal

2011-03-01T23:59:59.000Z

74

Design and Operation of First-and Second-Harmonic Coaxial Gyroklystrons for Advanced Accelerator Applications  

E-Print Network (OSTI)

Design and Operation of First-and Second-Harmonic Coaxial Gyroklystrons for Advanced Accelerator Applications

Castle, M; Granatstein, V L; Hogan, B; Lawson, W; Reiser, M; Xu, X

1998-01-01T23:59:59.000Z

75

Power Quality for Transmission and Distribution: Harmonics Design and Analytics Guidebook  

Science Conference Proceedings (OSTI)

The Electric Power Research Institute (EPRI) has published numerous guidebooks, reports, and technical briefs on subjects pertaining to harmonics. Overall, the full EPRI library of documents on harmonics is highly comprehensive and spans the entire range of subject matter, from the effects of harmonic voltages and currents on customer and utility equipment to methodologies useful in conducting harmonic studies. Although this large selection of harmonics-related documents exists, the individual documents ...

2011-11-30T23:59:59.000Z

76

Harmonizing Global Metrics for Data Center Energy Efficiency, February 2,  

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

Harmonizing Global Metrics for Data Center Energy Efficiency, Harmonizing Global Metrics for Data Center Energy Efficiency, February 2, 2010 Secondary menu About us Press room Contact Us Portfolio Manager Login Facility owners and managers Existing buildings Commercial new construction Industrial energy management Small business Service providers Service and product providers Verify applications for ENERGY STAR certification Design commercial buildings Energy efficiency program administrators Commercial and industrial program sponsors Associations State and local governments Federal agencies Tools and resources Training In This Section Campaigns Commercial building design Communications resources Energy management guidance Financial resources Portfolio Manager Products and purchasing Recognition Research and reports Service and product provider (SPP) resources

77

Third-harmonic generation and multiphoton ionization spectroscopy  

SciTech Connect

Nonlinear phenomena, such as multiphoton excitation (MPE) processes leading to ionization and third-harmonic generation (THG) in gases have become the issue of extensive studies over recent years. Studies in rare gases in particular have resulted in several interesting observations in this respect. Thus, it has been established that three-photon resonantly enhanced multiphoton ionization (MPI) in the vicinity of states which are single photon optically coupled to the ground state may occur in efficient competition with THG. The present work demonstrates several new effects which may appear when third-harmonic radiation is present during MPI.

Fotakis, C.; Stockdale, J.A.D.; Proctor, M.J.

1987-01-01T23:59:59.000Z

78

Effect of Structural Modification on Second Harmonic Generation in Collagen  

Science Conference Proceedings (OSTI)

The effects of structural perturbation on second harmonic generation in collagen were investigated. Type I collagen fascicles obtained from rat tails were structurally modified by increasing nonenzymatic cross-linking, by thermal denaturation, by collagenase digestion, or by dehydration. Changes in polarization dependence were observed in the dehydrated samples. Surprisingly, no changes in polarization dependence were observed in highly crosslinked samples, despite significant alterations in packing structure. Complete thermal denaturation and collagenase digestion produced samples with no detectable second harmonic signal. Prior to loss of signal, no change in polarization dependence was observed in partially heated or digested collagen.

Stoller, P C; Reiser, K M; Celliers, P M; Rubenchik, A M

2003-04-04T23:59:59.000Z

79

Cascaded Cerenkov third-harmonic generation in random quadratic media  

SciTech Connect

We investigate experimentally and theoretically the conical emission of Cerenkov-type third-harmonic generation in strontium barium niobate of random 2D-{chi}{sup (2)} distribution. The azimuthal intensity distribution is explained by the polarization properties of the fundamental and Cerenkov second-harmonic waves, depending on the cascaded origin of the generation process. Moreover, we show the role of the individual domain shape in an additional modulation on the conical emission, controlled by the electrical switching of the spontaneous polarization of the ferroelectric medium.

Ayoub, Mousa; Roedig, Philip; Imbrock, Joerg; Denz, Cornelia [Institute of Applied Physics and Center for Nonlinear Science (CeNoS), Westfaelische Wilhelms-Universitaet Muenster, Corrensstrasse 2, 48149 Muenster (Germany)

2011-12-12T23:59:59.000Z

80

Harmonic mean, the Gamma factor and Speed of Light  

E-Print Network (OSTI)

The relationship between the harmonic mean and special relativity is concisely elucidated. The arguments in favor and against SRT are explored. It is shown that the ratio of the speed of light to the harmonic mean of the onward and return speeds of light in a moving frame under Newtonian mechanics, when equitably distributed between space and time as a correction, leads to the Lorentz transformation. This correction implies an apparent contraction of objects and time dilation. However, the symmetry of the onward and inverse transformations give a different meaning to the gamma factor

Chandru Iyer

2008-11-05T23:59:59.000Z

Note: This page contains sample records for the topic "hartley harmon oldham" 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

Analysis and Design of New Harmonic Mitigation Approaches  

E-Print Network (OSTI)

Numerous approaches have been proposed in order to resolve the problems of current harmonics in electrical distribution systems. The rapid development of power semiconductors along with the revolutionary advances on microprocessors consolidated the motor drives industry and with it a massive proliferation of non-linear loads. It was thought that these very same technological advances would trigger an explosive development of harmonic solutions based on power electronics. Moreover, the introduction of the instantaneous active and reactive power theory or the so-called p, q theory which simplifies and gives more robustness to the control strategies of active filters reinforced this idea. Three decades have passed since the first IGBT was introduced in early 1980s, and active harmonic solutions are not the first choice to solve harmonic pollution in electrical distribution systems, mainly due to the high cost and the perception of low reliability. Given this scenario, in this work two main approaches are explored. First, the combination of an asymmetric 18-pulse rectifier with a reduced KVA active harmonic filter to improve the performance under abnormal utility conditions. Second, an interleaved active harmonic filter using multiple inverters connected in parallel at the ac and dc size, which will allow for higher power ratings and power density increase. The performance issues of the asymmetric 18-pulse rectifier under unbalanced voltage and pre-existing harmonic components are analyzed, as well as the current distortion improvement, achieved when an active power filter is introduced. On the other hand, the high frequency harmonic cancellation when interleaved inverters are used, the circulation of zero-sequence current and the impact of interleaving on dc bus capacitor are analyzed. Finally, some methods to mitigate the low frequency circulating currents based on eliminating the zero-sequence component, and the introduction of common mode inductors to reduce the high frequency circulating current are studied. Without a doubt the search for new cost-effective topologies able to reach broader power levels and voltage ranges will continue emerging giving more alternatives to users. Moreover, extensive research on wide band gap devices such as Silicon Carbide (SiC) and Gallium Nitride (GaN), with which it is possible to reach higher voltage breakdown and at least an order-of-magnitude lower switching losses, makes the future more promising for active solutions.

Aeloiza Matus, Eddy 1972-

2012-12-01T23:59:59.000Z

82

Web-assisted tunneling in the kicked harmonic oscillator  

E-Print Network (OSTI)

We show that heating of harmonically trapped ions by periodic delta kicks is dramatically enhanced at isolated values of the Lamb-Dicke parameter. At these values, quasienergy eigenstates localized on island structures undergo avoided crossings with extended web-states.

Andr R. R. Carvalho; Andreas Buchleitner

2004-09-20T23:59:59.000Z

83

Imaging Collagen Orientation Using Polarization-Modulated Second Harmonic Generation  

Science Conference Proceedings (OSTI)

We use polarization-modulated second harmonic generation to image fiber orientation in collagen tissues, with an axial resolution of about 10 {micro}m and a transverse resolution of up to 1 {micro}m. A linearly polarized ultra-short pulse (200 fs) Ti:Sapphire laser beam is modulated using an electro-optic modulator and quarter-wave plate combination and focused onto a translation stage mounted sample using a microscope objective. The generated second harmonic light is collected using a photomultiplier tube and demodulated using phase sensitive detection to obtain signal intensity and fiber orientation information. In order to obtain second harmonic generation images of different types of collagen organization, we analyze several different tissues, including rat-tail tendon, mouse aorta, mouse fibrotic liver, and porcine skin. We can use our technique to image fibrotic tissue in histological sections of damaged liver and to identify burned tissue in porcine skin to a depth of a few hundred microns. Polarization-modulated second harmonic generation potentially could be a useful clinical technique for diagnosing collagen related disease or damage, especially in the skin.

Stoller, P; Celliers, P M; Reiser, K M; Rubenchik, A M

2002-01-10T23:59:59.000Z

84

Harmonic generation of ion waves due to Brillouin backscattering  

Science Conference Proceedings (OSTI)

We report results of simulations of stimulated Brillouin backscatter in which we see the second spatial harmonic of the ion density fluctuation and compare with linear, fluid theory. We also describe examples of the competition between Raman and Brillouin backscatter. 21 refs., 3 figs.

Estabrook, K.; Kruer, W.L.; Haines, M.G.

1985-05-22T23:59:59.000Z

85

Controllability of the coupled spin-half harmonic oscillator system  

E-Print Network (OSTI)

We present a control-theoretic analysis of the system consisting of a two-level atom coupled with a quantum harmonic oscillator. We show that by applying external fields with just two resonant frequencies, any desired unitary operator can be generated.

Haidong Yuan; Seth Lloyd

2007-05-08T23:59:59.000Z

86

Elimination of Harmonics in a Multilevel Converter for HEV Applications  

E-Print Network (OSTI)

possible solu- tions are found. Keywords­ Hybrid Electric Vehicles, Multilevel Convert- ers, Harmonic Elimination, Resultants I. Introduction Designs for heavy duty hybrid-electric vehicles (HEVs) that have large electric drives such as tractor trailers, trans- fer trucks, or military vehicles will require advanced

Tolbert, Leon M.

87

Power Quality Hotline Call-of-the-Month for August 2009: Voltage Harmonics, Part 1: Fundamentals  

Science Conference Proceedings (OSTI)

This Call of the Month discusses what harmonics are and how they're produced. Part 2 will address the equipment concerns related to the presence of high levels of harmonic distortion in a customer's service voltage.

2009-12-11T23:59:59.000Z

88

Fault Detection and Diagnostics for Non-Intrusive Monitoring Using Motor Harmonics  

E-Print Network (OSTI)

Harmonic analysis of motor current has been used to track the speed of motors for sensorless control. Algorithms exist that track the speed of a motor given a dedicated stator current measurement, for example. Harmonic ...

Orji, Uzoma A.

89

The Spherical Harmonics Discrete Ordinate Method for Three-Dimensional Atmospheric Radiative Transfer  

Science Conference Proceedings (OSTI)

A new algorithm for modeling radiative transfer in inhomogeneous three-dimensional media is described. The spherical harmonics discrete ordinate method uses a spherical harmonic angular representation to reduce memory use and time computing the ...

K. Franklin Evans

1998-02-01T23:59:59.000Z

90

Four-Stream Spherical Harmonic Expansion Approximation for Solar Radiative Transfer  

Science Conference Proceedings (OSTI)

This paper presents a four-stream extension of the ?-Eddington approximation by considering the higher-order spherical harmonic expansion in radiative intensity. By using the orthogonality relation of the spherical harmonic functions, the ...

J. Li; V. Ramaswamy

1996-04-01T23:59:59.000Z

91

A three-phase converter model for harmonic analysis of HVDC systems  

Science Conference Proceedings (OSTI)

An equivalent circuit model is presented to model bridge converters for three-phase HVDC harmonic power flow analysis. The validity and accuracy of the model are verified by comparing simulation results against field test results. The model is interfaced with a multiphase harmonic load flow program to investigate the generation of non-characteristic harmonics from HVDC links and the flow of HVDC harmonics in a real system.

Xu, W.; Drakos, J.E.; Mansour, Y.; Chang, A. (B.C. Hydro, Burnaby, British Columbia (Canada))

1994-07-01T23:59:59.000Z

92

Enhanced Harmonic Up-Conversion Using a Hybrid HGHG-EEHG Scheme  

SciTech Connect

We introduce a novel harmonic generation scheme which can be used, for a given desired harmonic, to achieve higher bunching factors, weaker chicanes, and/or less final energy spread than can be achieved using Echo-Enabled Harmonic Generation. This scheme only requires a single laser with relatively low power, and is a hybrid of High-Gain Harmonic Generation and EEHG. We present a design of this scheme applied to the Next Generation Light Source (NGLS).

Marksteiner, Quinn R. [Los Alamos National Laboratory; Bishofberger, Kip A. [Los Alamos National Laboratory; Carlsten, Bruce E. [Los Alamos National Laboratory; Freund, Henry P. [Los Alamos National Laboratory; Yampolsky, Nikolai A. [Los Alamos National Laboratory

2012-04-30T23:59:59.000Z

93

Improvement of the disc harmonic moments descriptor by an exponentially decaying distance transform  

Science Conference Proceedings (OSTI)

The authors propose an improvement of a recent region-based shape descriptor inspired by the 3D spherical harmonics: the Disk Harmonic Moments Descriptor (DHMD). The binary image is weighted by an exponentially decaying distance transform (EDDT) before ... Keywords: content-based image, distance transform, legendre polynomials, region-based shape descriptor, retrieval, salience distance transform, spherical harmonics

Noureddine Ennahnahi; Mohammed Oumsis; Mohammed Meknassi

2010-08-01T23:59:59.000Z

94

BAYESIAN ANALYSIS OF MULTIPLE HARMONIC OSCILLATIONS IN THE SOLAR CORONA  

SciTech Connect

The detection of multiple mode harmonic kink oscillations in coronal loops enables us to obtain information on coronal density stratification and magnetic field expansion using seismology inversion techniques. The inference is based on the measurement of the period ratio between the fundamental mode and the first overtone and theoretical results for the period ratio under the hypotheses of coronal density stratification and magnetic field expansion of the wave guide. We present a Bayesian analysis of multiple mode harmonic oscillations for the inversion of the density scale height and magnetic flux tube expansion under each of the hypotheses. The two models are then compared using a Bayesian model comparison scheme to assess how plausible each one is given our current state of knowledge.

Arregui, I.; Asensio Ramos, A.; Diaz, A. J., E-mail: iarregui@iac.es [Instituto de Astrofisica de Canarias, Via Lactea s/n, E-38205 La Laguna, Tenerife (Spain)

2013-03-01T23:59:59.000Z

95

Damping the zero-point energy of a harmonic oscillator  

E-Print Network (OSTI)

The physics of quantum electromagnetism in an absorbing medium is that of a field of damped harmonic oscillators. Yet until recently the damped harmonic oscillator was not treated with the same kind of formalism used to describe quantum electrodynamics in a arbitrary medium. Here we use the techniques of macroscopic QED, based on the Huttner--Barnett reservoir, to describe the quantum mechanics of a damped oscillator. We calculate the thermal and zero-point energy of the oscillator for a range of damping values from zero to infinity. While both the thermal and zero-point energies decrease with damping, the energy stored in the oscillator at fixed temperature increases with damping, an effect that may be experimentally observable. As the results follow from canonical quantization, the uncertainty principle is valid for all damping levels.

T. G Philbin; S. A. R. Horsley

2013-04-03T23:59:59.000Z

96

On the moment of inertia of a quantum harmonic oscillator  

SciTech Connect

An original method for calculating the moment of inertia of the collective rotation of a nucleus on the basis of the cranking model with the harmonic-oscillator Hamiltonian at arbitrary frequencies of rotation and finite temperature is proposed. In the adiabatic limit, an oscillating chemical-potential dependence of the moment of inertia is obtained by means of analytic calculations. The oscillations of the moment of inertia become more pronounced as deformations approach the spherical limit and decrease exponentially with increasing temperature.

Khamzin, A. A., E-mail: airat.khamzin@rambler.ru; Sitdikov, A. S. [Kazan (Volga region) Federal University (Russian Federation)] [Kazan (Volga region) Federal University (Russian Federation); Nikitin, A. S. [Kazan State Power-Engineering University (Russian Federation)] [Kazan State Power-Engineering University (Russian Federation); Roganov, D. A. [Open Corporation Joint-Stock Commercial Investment Bank Tatfondbank (Russian Federation)] [Open Corporation Joint-Stock Commercial Investment Bank Tatfondbank (Russian Federation)

2013-04-15T23:59:59.000Z

97

Calculation of HVDC converter noncharacteristic harmonics using digital time-domain simulation method  

Science Conference Proceedings (OSTI)

In this paper, noncharacteristic harmonics of an HVdc converter station are calculated based on the use of digital time-domain simulation methods. An enhanced version of the Electromagnetic Transients Program (EMTP) is used for the studies. The noncharacteristic harmonics of interest are (1) the dc side triplen harmonics, and (2) the ac side second harmonic. Impacts of loading conditions, neutral filter, and converter firing angle on the dc side triplen harmonics are discussed. Effects of ac side network parameters, static VAR compensator (SVC), transformer half-cycle saturation, and Geomagnetically Induced Current (GIC) on the ac side second harmonic instability are also presented. This paper concludes that the digital time-domain simulation method provides significant flexibility for accurate prediction of (1) generation mechanism, and (2) adverse impacts of HVdc noncharacteristic harmonics.

Sarshar, A. [Trench Electric, Scarborough, Ontario (Canada); Iravani, M.R.; Li, J. [Univ. of Toronto, Ontario (Canada). Dept. of Electrical and Computer Engineering

1996-01-01T23:59:59.000Z

98

Dynamics of Flat Bunches with Second Harmonic RF  

Science Conference Proceedings (OSTI)

We investigate the dynamics of longitudinally flat bunches created with a second harmonic cavity in a high energy collider. We study Landau damping in a second harmonic cavity with analytical and numerical methods. The latter include particle tracking and evolution of the phase space density. The results are interpreted in the context of possible application to the LHC. A possible path to a luminosity upgrade at the LHC is through the creation of longitudinally flat bunches. They can increase the luminosity roughly by 40% when the beam intensities are at the beam-beam limit. Lower momentum spread which can reduce backgrounds and make collimation easier as well lower peak fields which can mitigate electron cloud effects are other advantages. Use of a second harmonic rf system is a frequently studied method to create such flat bunches. Here we consider some aspects of longitudinal dynamics of these bunches in the LHC at top energy. First we consider intensity limits set by the loss of Landau damping against rigid dipole oscillations. Next we describe numerical simulations using both particle tracking and evolution of the phase space density. These simulations address the consequences of driving a bunch at a frequency that corresponds to the maximum of the synchrotron frequency.

Sen, Tanaji; /Fermilab; Bhat, Chandra; /Fermilab; Kim, Hyung Jin; /Fermilab; Ostiguy, Jean-Francois; /Fermilab

2010-05-01T23:59:59.000Z

99

Background and Reflections on the Life Cycle Assessment Harmonization Project  

DOE Green Energy (OSTI)

Despite the ever-growing body of life cycle assessment (LCA) literature on electricity generation technologies, inconsistent methods and assumptions hamper comparison across studies and pooling of published results. Synthesis of the body of previous research is necessary to generate robust results to assess and compare environmental performance of different energy technologies for the benefit of policy makers, managers, investors, and citizens. With funding from the U.S. Department of Energy, the National Renewable Energy Laboratory initiated the LCA Harmonization Project in an effort to rigorously leverage the numerous individual studies to develop collective insights. The goals of this project were to: (1) understand the range of published results of LCAs of electricity generation technologies, (2) reduce the variability in published results that stem from inconsistent methods and assumptions, and (3) clarify the central tendency of published estimates to make the collective results of LCAs available to decision makers in the near term. The LCA Harmonization Project's initial focus was evaluating life cycle greenhouse gas (GHG) emissions from electricity generation technologies. Six articles from this first phase of the project are presented in a special supplemental issue of the Journal of Industrial Ecology on Meta-Analysis of LCA: coal (Whitaker et al. 2012), concentrating solar power (Burkhardt et al. 2012), crystalline silicon photovoltaics (PVs) (Hsu et al. 2012), thin-film PVs (Kim et al. 2012), nuclear (Warner and Heath 2012), and wind (Dolan and Heath 2012). Harmonization is a meta-analytical approach that addresses inconsistency in methods and assumptions of previously published life cycle impact estimates. It has been applied in a rigorous manner to estimates of life cycle GHG emissions from many categories of electricity generation technologies in articles that appear in this special supplemental supplemental issue, reducing the variability and clarifying the central tendency of those estimates in ways useful for decision makers and analysts. Each article took a slightly different approach, demonstrating the flexibility of the harmonization approach. Each article also discusses limitations of the current research, and the state of knowledge and of harmonization, pointing toward a path of extending and improving the meta-analysis of LCAs.

Heath, G. A.; Mann, M. K.

2012-04-01T23:59:59.000Z

100

Mapping the nonlinear optical susceptibility by noncollinear second harmonic generation  

E-Print Network (OSTI)

We present a method, based on noncollinear second harmonic generation, to evaluate the non-zero elements of the nonlinear optical susceptibility. At a fixed incidence angle, the generated signal is investigated by varying the polarization state of both fundamental beams. The resulting polarization charts allows to verify if Kleinman symmetry rules can be applied to a given material or to retrieve the absolute value of the nonlinear optical tensor terms, from a reference measurement. Experimental measurements obtained from Gallium Nitride layers are reported. The proposed method does not require an angular scan thus is useful when the generated signal is strongly affected by sample rotation

Larciprete, M C; Giardina, M; Belardini, A; Centini, M; Sibilia, 1 C; Bertolotti, M; Passaseo, A; Tasco, V

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hartley harmon oldham" 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

Non-Markovian quantum Brownian motion of a harmonic oscillator  

Science Conference Proceedings (OSTI)

We apply the density-matrix method to the study of quantum Brownian motion of a harmonic oscillator coupled to a heat bath, a system investigated previously by Caldeira and Leggett using a different method. Unlike the earlier work, in our derivation of the master equation the non-Markovian terms are maintained. Although the same model of interaction is used, discrepancy is found between their results and our equation in the Markovian limit. We also point out that the particular interaction model used by both works cannot lead to the phenomenological generalized Langevin theory of Kubo.

Tang, J.

1994-02-01T23:59:59.000Z

102

A non-conforming 3D spherical harmonic transport solver  

Science Conference Proceedings (OSTI)

A new 3D transport solver for the time-independent Boltzmann transport equation has been developed. This solver is based on the second-order even-parity form of the transport equation. The angular discretization is performed through the expansion of the angular neutron flux in spherical harmonics (PN method). The novelty of this solver is the use of non-conforming finite elements for the spatial discretization. Such elements lead to a discontinuous flux approximation. This interface continuity requirement relaxation property is shared with mixed-dual formulations such as the ones based on Raviart-Thomas finite elements. Encouraging numerical results are presented. (authors)

Van Criekingen, S. [Commissariat a l'Energie Atomique CEA-Saclay, DEN/DM2S/SERMA/LENR Bat 470, 91191 Gif-sur-Yvette, Cedex (France)

2006-07-01T23:59:59.000Z

103

Power Quality and Harmonic Impacts of Distributed Generation Technologies  

Science Conference Proceedings (OSTI)

The PQ TechWatch report series builds on EPRI's broad expertise and power quality testing and evaluation work to provide a vital flow of data, including important information on emerging trends powering ebusinesses and developments in next-generation power quality mitigation and energy storage technologies.This PQ TechWatch aims to present an overview of power quality impacts resulting from operation of DG technologies on the grid. An emphasis on harmonic effects is included here. Concerns in this area a...

2010-12-14T23:59:59.000Z

104

Harmonizing Melodies in Real-Time: the Connectionist Approach  

E-Print Network (OSTI)

We describe a sequential neural network for harmonizing melodies in real time. It models aspects of human cognition. This neural network succeeds reasonably well, if we take into consideration the constraints imposed by real time processing. The model exploits efficiently the available sequential information. The net contains a sub-net for meter that produces a periodic index of meter, providing the needed metric awareness. The net learns the relations between important notes of the melody and their harmonies and is able to produce harmonies for new melodies in real time, i.e., without knowledge of the future development of the melody.

Dan Gang; Daniel Lehmann; Naftali Wagner

1997-01-01T23:59:59.000Z

105

Harmonic coordinates in the string and membrane equations  

Science Conference Proceedings (OSTI)

In this note, we first show that the solutions to Cauchy problems for two versions of relativistic string and membrane equations are diffeomorphic. Then we investigate the coordinates transformation presented in D. X. Kong and Q. Zhang [Physica D 238, 902 (2009); see (2.20)] which plays an important role in the study on the dynamics of the motion of string in Minkowski space. This kind of transformed coordinates is harmonic coordinates, and the nonlinear relativistic string equations can be straightforwardly simplified into linear wave equations under this transformation.

He Chunlei; Huang Shoujun [Department of Mathematics, Anhui Normal University, Wuhu 241000 (China)

2010-09-15T23:59:59.000Z

106

Unbalance and Harmonic Concerns When Forging Facility Fed From Backup Generator  

Science Conference Proceedings (OSTI)

This power quality (PQ) case study presents the analysis and mitigation suggestions for unbalance and harmonic concerns when forging a facility fed from a backup generator.

2003-12-31T23:59:59.000Z

107

Numerical studies of third-harmonic generation in laser filament in air perturbed by plasma spot  

Science Conference Proceedings (OSTI)

Third-harmonic emission from laser filament intercepted by plasma spot is studied by numerical simulations. Significant enhancement of the third-harmonic generation is obtained due to the disturbance of the additional plasma. The contribution of the pure plasma effect and the possible plasma-enhanced third-order susceptibility on the third-harmonic generation enhancement are compared. It is shown that the plasma induced cancellation of destructive interference [Y. Liu et al., Opt. Commun. 284, 4706 (2011)] of two-colored filament is the dominant mechanism of the enhancement of third-harmonic generation.

Feng Liubin [Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190 (China); Institute of Atomic and Molecular Physics and Department of Physics, Sichuan University, Chengdu 610065 (China); Lu Xin; Liu Xiaolong; Li Yutong; Chen Liming; Ma Jinglong; Dong Quanli; Wang Weimin [Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190 (China); Xi Tingting [College of Physical Sciences, Graduate University of Chinese Academy of Sciences, Beijing 100049 (China); Sheng Zhengming; Zhang Jie [Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190 (China); Key Laboratory for Laser Plasmas of the Ministry of Education of China and Department of Physics, Shanghai Jiao Tong University, Shanghai 200240 (China); He Duanwei [Institute of Atomic and Molecular Physics and Department of Physics, Sichuan University, Chengdu 610065 (China)

2012-07-15T23:59:59.000Z

108

Energy Efficiency Standards and Labels in North America: Opportunities for Harmonization  

E-Print Network (OSTI)

for harmonization are standby losses, uniform endorsementthe three countries. a) Standby losses: Relevant activities:order on energy efficient standby power devices. The order

Wiel, Stephen

2008-01-01T23:59:59.000Z

109

Technical Study Addresses a Key Challenge to Harmonizing U.S...  

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

and U.S. and international standards appear to be closer to harmonization. Technical Contacts: John Wohlgemuth, john.wohlgemuth@nrel.gov; Michael Kempe,...

110

Cholesterol and Phytosterol Oxidation ProductsChapter 6 Harmonization of Cholesterol Oxidation Product Analysis  

Science Conference Proceedings (OSTI)

Cholesterol and Phytosterol Oxidation Products Chapter 6 Harmonization of Cholesterol Oxidation Product Analysis Food Science Health Nutrition Biochemistry eChapters Food Science & Technology Health - Nutrition - Biochemistry Press

111

High-order harmonic generation in Xe, Kr, and Ar driven by a 2.1-?m source: High-order harmonic spectroscopy under macroscopic effects  

E-Print Network (OSTI)

We experimentally and numerically study the atomic response and pulse propagation effects of high-order harmonics generated in Xe, Kr, and Ar driven by a 2.1-?m infrared femtosecond light source. The light source is an ...

Hong, Kyung-Han

112

Harmonic Amplitudes Calculation Method and Simulation of Diode-bridge Rectifier's Output Current  

Science Conference Proceedings (OSTI)

Taking the three-phase uncontrolled diode-bridge rectifier of a certain style armored vehicles power supple system as research object, a practical method to calculate the harmonic amplitudes of rectifiers DC-side output current is theoretically ... Keywords: rectifier, harmonic amplitude, switching function, simulation, MATLAB

Wei Wei; Xiaojun Ma; Shuguang Wei; Zhaozhao He

2010-03-01T23:59:59.000Z

113

Study on the Harmonics of Photovoltaic Generation SPWM Inverting Power Supplies  

Science Conference Proceedings (OSTI)

Harmonics are the main polluting source of affecting the power energy quality. In this paper, the causes that SPWM inverter power supply produces the harmonics are analyzed firstly and then a new three-phase ?-band-pass filter is designed to improve ... Keywords: harmonious, solar energy photovoltaic power, inverter, current ripples component

Jianqu Zhu; Feng Wang; Taiqiang Cao

2012-04-01T23:59:59.000Z

114

Adjustable Speed Drive: Harmonic Effects on Induction Motors: Volumes 1 and 2  

Science Conference Proceedings (OSTI)

The use of adjustable speed drives (ASDs) for induction motors in electric power plants has several advantages, but ASDs produce harmonic current and voltage that can result in problems. The Standstill Frequency Response (RFR) program for the personal PC can be used to study these harmonic effects in a wide range of motors.

1995-11-08T23:59:59.000Z

115

Adjustable Speed Drive: Harmonic Effects on Induction Motors: Volumes 1 and 2  

Science Conference Proceedings (OSTI)

The use of adjustable speed drives (ASDs) for induction motors in electric power plants has several advantages, but ASDs produce harmonic current and voltage that can result in problems. The Standstill Frequency Response (RFR) program for the personal PC can be used to study these harmonic effects in a wide range of motors.

1995-11-09T23:59:59.000Z

116

Modeling and experimental validation of internal faults in salient pole synchronous machines including space harmonics  

Science Conference Proceedings (OSTI)

Considering the space harmonics caused by the faulted windings, a simulation model of internal faults in salient pole synchronous machines is proposed in this paper. The model is based on the winding function approach, which makes no assumption for sinusoidal ... Keywords: Internal faults, Space harmonics, Synchronous machines, Winding function

X. Tu; L. -A. Dessaint; M. El Kahel; A. Barry

2006-06-01T23:59:59.000Z

117

Modeling DFIG Using General Vector Representation in the Presence of Harmonics  

Science Conference Proceedings (OSTI)

In this paper, a doubly-fed induction generator (DFIG) wind turbine is modeled by using the general vector representation of voltage, current and magnetic flux in the presence of harmonics. The general vector representation provides insights into how ... Keywords: wind turbine, harmonics, general vector form, DFIG

Ziqiao Liu, Ahmed Abu-Hajar, David Wenzhong Gao

2013-04-01T23:59:59.000Z

118

Original article: Selective compensation of voltage harmonics in grid-connected microgrids  

Science Conference Proceedings (OSTI)

In this paper, a novel approach is proposed for selective compensation of main voltage harmonics in a grid-connected microgrid. The aim of compensation is to provide a high voltage quality at the point of common coupling (PCC). PCC voltage quality is ... Keywords: Distributed generator (DG), Grid-connected, Microgrid, Voltage harmonics compensation

Mehdi Savaghebi, Juan C. Vasquez, Alireza Jalilian, Josep M. Guerrero, Tzung-Lin Lee

2013-05-01T23:59:59.000Z

119

Computationally fast harmonic balance methods for unsteady aerodynamic predictions of helicopter rotors  

Science Conference Proceedings (OSTI)

A harmonic balance technique for the analysis of unsteady flows about helicopter rotors in forward flight and hover is presented in this paper. The aerodynamics of forward flight are highly nonlinear, with transonic flow on the advancing blade, subsonic ... Keywords: Computational fluid dynamics, Frequency-domain methods, Harmonic balance technique, Helicopter rotors, Unsteady aerodynamics

Kivanc Ekici; Kenneth C. Hall; Earl H. Dowell

2008-06-01T23:59:59.000Z

120

Harmonic filters influences regarding the power quality on high frequency electrothermal installation with electromagnetic induction  

Science Conference Proceedings (OSTI)

This paper presents a study regarding the functioning of a melting/hardening electrothermal installation with electromagnetic induction from the point of view of generated harmonics in the power distribution. The authors made simulations in scope of ... Keywords: electrothermal installation, harmonic, passive filters, static converter

Raluca Rob; Ioan Sora; Caius Panoiu; Manuela Panoiu

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hartley harmon oldham" 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

Multiple Cerenkov second-harmonic waves in a two-dimensional  

E-Print Network (OSTI)

Multiple Cerenkov second-harmonic waves in a two-dimensional nonlinear photonic structure Wenjie fundamental beams. We show that this phenomenon is caused by the nonlinear Cerenkov radiation emitted due verify the effects of reciprocal vectors on the Cerenkov-type second-harmonic generation in nonlinear

Arie, Ady

122

Harmonic generation and wave mixing in nonlinear metamaterials and photonic crystals (Invited paper)  

Science Conference Proceedings (OSTI)

The basic concepts and phenomenology of wave mixing and harmonic generation are reviewed in context of the recent advances in the enhanced nonlinear activity in metamaterials and photonic crystals. The effects of dispersion, field confinement and phase ... Keywords: bandgap, dispersion, harmonic generation, nonlinear metamaterial, pulses

O. Shramkova; A. Schuchinsky

2012-07-01T23:59:59.000Z

123

Extraction of voltage harmonics using multi-layer perceptron neural network  

Science Conference Proceedings (OSTI)

This paper presents a harmonic extraction algorithm using artificial neural networks for Dynamic Voltage Restorers (DVRs). The suggested algorithm employs a feed forward Multi Layer Perceptron (MLP) Neural Network with error back propagation learning ... Keywords: Dynamic Voltage Restorer, Harmonic extraction, Multi Layer Perceptron, Neural Networks

Mehmet Tmay; M. Emin Meral; K. a?atay Bayindir

2008-09-01T23:59:59.000Z

124

Harmonization of Road Signs for Electric Vehicle Charging Stations  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Avenue Louise 200 Box 113 1050 Brussels Belgium 1 Avenue Louise 200 Box 113 1050 Brussels Belgium 1 32.2.647.3218 Mobile 32.473.284.603 jseisler@cleanfuelsconsulting.org www.cleanfuelsconsulting.org Harmonization of Road Signs for Electric Vehicle Charging Stations Prepared for: Argonne National Laboratory and the U.S. Department of Energy November 2012 Avenue Louise 200 Box 113 1050 Brussels Belgium 2 32.2.647.3218 Mobile 32.473.284.603 jseisler@cleanfuelsconsulting.org www.cleanfuelsconsulting.org This page is intentionally blank. Avenue Louise 200 Box 113 1050 Brussels Belgium 3 32.2.647.3218 Mobile 32.473.284.603 jseisler@cleanfuelsconsulting.org www.cleanfuelsconsulting.org TABLE OF CONTENTS ACKNOWLEDGMENTS ............................................................................................................. 5

125

Harmonic voltages and currents on two Greek islands with photovoltaic stations: Study and field measurements  

Science Conference Proceedings (OSTI)

The purpose of this paper is to investigate the harmonic distortion present to the electric grid of two small Greek islands (Arki and Antikythera) where Photovoltaic Stations are installed, to study their inverters harmonic behavior and to present the measurements of the harmonic voltages and currents obtained at field tests on these two islands. It is shown that the harmonics injected by the Photovoltaic Stations to the electric grid are not very high and at most cases they can not cause significant problems to the appliances to he customers. On the other had, a theoretical analysis of the installed inverters technology is also presented, showing that the results from the measurements and those of the presented analysis are quite identical. From both measurements and theoretical analysis remarkable conclusions concerning the problem of harmonics are drawn.

Vokas, G.A.; Machias, A.V. [National Technical Univ., Athens (Greece). Electric Power Div.

1995-06-01T23:59:59.000Z

126

Intense multimicrojoule high-order harmonics generated from neutral atoms of In{sub 2}O{sub 3} nanoparticles  

Science Conference Proceedings (OSTI)

We studied high-order harmonic generation from plasma that contains an abundance of indium oxide nanoparticles. We found that harmonics from nanoparticle-containing plasma are considerably more intense than from plasma produced on the In{sub 2}O{sub 3} bulk target, with high-order harmonic energy ranging from 6 {mu}J (for the ninth harmonic) to 1 {mu}J (for the 17th harmonic) in the former case. The harmonic cutoff from nanoparticles was at the 21st order, which is lower than that observed using indium oxide solid target. By comparing the harmonic spectra obtained from solid and nanoparticle indium oxide targets, we concluded that intense harmonics in the latter case are dominantly generated from neutral atoms of the In{sub 2}O{sub 3} nanoparticles.

Elouga Bom, L. B.; Abdul-Hadi, J.; Vidal, F.; Ozaki, T. [Centre Energie, Materiaux et Telecommunications, Institut National de la Recherche Scientifique, 1650 Lionel-Boulet, Varennes, Quebec J3X 1S2 (Canada); Ganeev, R. A. [Centre Energie, Materiaux et Telecommunications, Institut National de la Recherche Scientifique, 1650 Lionel-Boulet, Varennes, Quebec J3X 1S2 (Canada); Scientific Association Akadempribor, Uzbekistan Academy of Sciences, Akademgorodok, Tashkent 100125 (Uzbekistan)

2009-03-16T23:59:59.000Z

127

Cherenkov high-order harmonic generation by multistep cascading in {chi}{sup (2)} nonlinear photonic crystal  

Science Conference Proceedings (OSTI)

We propose a scheme for efficient Cherenkov high-order harmonic generation. Second to fifth order harmonic wave are observed in a single periodically poled ferroelectric crystal in our experiment. The noncollinear high-order harmonic generation is produced via enhanced Cherenkov second harmonic cascaded with successive multistep sum-frequency generation with simultaneously longitudinal phase-matching. The emission angle and power dependencies are analyzed in detail experimentally, which coincide with theoretical predictions.

An Ning; Ren Huaijin [Department of Physics, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 (China); State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication Systems, Shanghai 200240 (China); Zheng Yuanlin [Department of Physics, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 (China); Key Laboratory for Laser Plasmas (Ministry of Education), Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 (China); Deng Xuewei [Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang, Sichuan 621900 (China); Chen Xianfeng [Department of Physics, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 (China); State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication Systems, Shanghai 200240 (China); Key Laboratory for Laser Plasmas (Ministry of Education), Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 (China)

2012-05-28T23:59:59.000Z

128

Theoretical studies of high-order harmonic generation: Effects of symmetry, degeneracy, and orientation  

SciTech Connect

Using a quantum-mechanical three-step model, we present numerical calculations of the high-order harmonic generation from four polyatomic molecules. Ethylene (C{sub 2}H{sub 4}) serves as an example where orbital symmetry directly affects the harmonic yield. We treat the case of methane (CH{sub 4}) to address the high-order harmonic generation resulting from a molecule with degenerate orbitals. To this end we illustrate how the single-orbital contributions show up in the total high-order harmonic signal. This example illustrates the importance of adding coherently the amplitude contributions from the individual degenerate orbitals. Finally, we study the high-order harmonic generation from propane (C{sub 3}H{sub 8}) and butane (C{sub 4}H{sub 10}). These two molecules, being extended and far from spherical in structure, produce harmonics with nontrivial orientational dependencies. In particular, propane can be oriented so that very high-frequency harmonics are favored, and thus the molecule contains prospects for the generation of uv attosecond pulses.

Madsen, C. B.; Madsen, L. B. [Lundbeck Foundation Theoretical Center for Quantum System Research, Department of Physics and Astronomy, University of Aarhus, 8000 Aarhus C (Denmark)

2007-10-15T23:59:59.000Z

129

Results of the harmonics measurement program at the John F. Long photovoltaic house  

SciTech Connect

Photovoltaic (PV) systems used in single-family dwellings require an inverter to act as an interface between the direct-current (dc) power output of the PV unit and the alternating-current (ac) power needed by house loads. A type of inverter known as line-commutated injects harmonic currents on the ac side and requires large amounts of reactive power. Large numbers of such PV installations could lead to unacceptable levels of harmonic voltages on the utility system, and the need to increase the utility's delivery of reactive power could result in significant cost increases. The harmonics and power-factor effects are examined for a single PV installation using a line-commutated inverter. The data were obtained during a five-day measurement program conducted at the John F. Long House, which is a prototype residential PV installation located in Phoenix, Arizona. The magnitude and phase of various currents and voltages from the fundamental to the 13th harmonic were recorded both with and without the operation of the PV system. The inverter can be looked upon as an ideal current source that injects definable amounts of current at any particular harmonic frequency; the harmonic currents that were normally conducted by the house loads underwent very little change as a result of currents injected by the inverter; the harmonic voltages seen by the house loads were slightly altered due to the passage of the inverter harmonic currents through system impedances, but no effect on the voltage harmonics was observed at the distribution transformer primary; and the inverter's reactive power demands more than doubled the maximum demand that would be expected for a normal home. Sufficient information was obtained to provide for a conservative modeling of a representative PV system to be used in a computer program designed to evaluate the effects of larger concentrations of PV systems.

Campen, G.L.

1982-03-01T23:59:59.000Z

130

Surface harmonics method equations for solving the time-dependent neutron transport problems and their verification  

Science Conference Proceedings (OSTI)

Finite-difference time-dependent equations of Surface Harmonics method have been obtained for plane geometry. Verification of these equations has been carried out by calculations of tasks from 'Benchmark Problem Book ANL-7416'. The capacity and efficiency of the Surface Harmonics method have been demonstrated by solution of the time-dependent neutron transport equation in diffusion approximation. The results of studies showed that implementation of Surface Harmonics method for full-scale calculations will lead to a significant progress in the efficient solution of the time-dependent neutron transport problems in nuclear reactors. (authors)

Boyarinov, V. F.; Kondrushin, A. E.; Fomichenko, P. A. [National Research Center, Kurchatov Inst., Kurchatov Sq. 1, Moscow (Russian Federation)

2012-07-01T23:59:59.000Z

131

Electro-optic harmonic conversion to switch a laser beam out of a cavity  

DOE Patents (OSTI)

The invention is a switch to permit a laser beam to escape a laser cavity through the use of an externally applied electric field across a harmonic conversion crystal. Amplification takes place in the laser cavity, and then the laser beam is switched out by the laser light being harmonically converted with dichroic or polarization sensitive elements present to alter the optical path of the harmonically converted laser light. Modulation of the laser beam can also be accomplished by varying the external electric field.

Haas, Roger A. (Pleasanton, CA); Henesian, Mark A. (Livermore, CA)

1987-01-01T23:59:59.000Z

132

Isotope effects in the harmonic response from hydrogenlike muonic atoms in strong laser fields  

SciTech Connect

High-order harmonic generation from hydrogenlike muonic atoms exposed to ultraintense high-frequency laser fields is studied. Systems of low nuclear-charge number Z are considered where a nonrelativistic description applies. By comparing the radiative response for different isotopes, we demonstrate characteristic signatures of the finite nuclear mass and size in the harmonic spectra. In particular, for Z>1, an effective muon charge appears in the Schroedinger equation for the relative particle motion, which influences the position of the harmonic cutoff. Cutoff energies in the million-electron-volt domain can be achieved, offering prospects for the generation of ultrashort coherent {gamma}-ray pulses.

Shahbaz, Atif; Mueller, Carsten [Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg (Germany); Buervenich, Thomas J. [Frankfurt Institute for Advanced Studies, Johann Wolfgang Goethe University, Ruth-Moufang-Strasse 1, D-60438 Frankfurt am Main (Germany)

2010-07-15T23:59:59.000Z

133

Time-frequency analysis and Harmonic Gaussian Functions  

E-Print Network (OSTI)

A method for time-frequency analysis is given. The approach utilizes properties of Gaussian distribution, properties of Hermite polynomials and Fourier analysis. We begin by the definitions of a set of functions called harmonic Gaussian functions. Then these functions are used to define a set of transformations,noted T_n, which associate to a function {\\psi},of the time variable t, a set of functions {\\Psi}_n which depend on time, frequency and frequency (or time) standard deviation. Some properties of the transformations T_n and the functions {\\Psi}_n are given. It is proved in particular that the square of the modulus of each function {\\Psi}_n can be interpreted as a representation of the energy distribution of the signal, represented by the function {\\psi}, in the time-frequency plane for a given value of the frequency (or time) standard deviation. It is also shown that the function {\\psi}, can be recovered from the functions{\\Psi}_n.

Tokiniaina Ranaivoson; Raoelina Andriambololona; Rakotoson Hanitriarivo

2013-03-08T23:59:59.000Z

134

Sliding-mode amplitude control techniques for harmonic oscillators  

E-Print Network (OSTI)

This thesis investigates both theoretical and implementation-level aspects of switching- feedback control strategies for the development of voltage-controlled oscillators. We use a modified sliding-mode compensation scheme based on various norms of the system state to achieve amplitude control for wide-tuning range oscillators. The proposed controller provides amplitude control at minimal cost in area and power consumption. Verification of our theory is achieved with the physical realization of an amplitude controlled negative-Gm LC oscillator. A wide-tuning range RF ring oscillator is developed and simulated, showing the effectiveness of our methods for high speed oscillators. The resulting ring oscillator produces an amplitude controlled sinusoidal signal operating at frequencies ranging from 170 MHz to 2.1 GHz. Total harmonic distortion is maintained below 0:8% for an oscillation amplitude of 2 Vpp over the entire tuning range. Phase noise is measured as -105.6 dBc/Hz at 1.135 GHz with a 1 MHz offset.

Marquart, Chad A.

2003-05-01T23:59:59.000Z

135

Thermalization in harmonic particle chains with velocity flips  

E-Print Network (OSTI)

We propose a new mathematical tool for the study of transport properties of models for lattice vibrations in crystalline solids. By replication of dynamical degrees of freedom, we aim at a new dynamical system where the "local" dynamics can be isolated and solved independently from the "global" evolution. The replication procedure is very generic but not unique as it depends on how the original dynamics are split between the local and global dynamics. As an explicit example, we apply the scheme to study thermalization of the pinned harmonic chain with velocity flips. We improve on the previous results about this system by showing that after a relatively short time period the average kinetic temperature profile satisfies the dynamic Fourier's law in a local microscopic sense without assuming that the initial data is close to a local equilibrium state. The bounds derived here prove that the above thermalization period is at most of the order L^(2/3), where L denotes the number of particles in the chain. In particular, even before the diffusive time scale Fourier's law becomes a valid approximation of the evolution of the kinetic temperature profile. As a second application of the dynamic replica method, we also briefly discuss replacing the velocity flips by an anharmonic onsite potential.

Jani Lukkarinen

2013-08-22T23:59:59.000Z

136

Spherical Harmonic Solutions to the 3D Kobayashi Benchmark Suite  

SciTech Connect

Spherical harmonic solutions of order 5, 9 and 21 on spatial grids containing up to 3.3 million cells are presented for the Kobayashi benchmark suite. This suite of three problems with simple geometry of pure absorber with large void region was proposed by Professor Kobayashi at an OECD/NEA meeting in 1996. Each of the three problems contains a source, a void and a shield region. Problem 1 can best be described as a box in a box problem, where a source region is surrounded by a square void region which itself is embedded in a square shield region. Problems 2 and 3 represent a shield with a void duct. Problem 2 having a straight and problem 3 a dog leg shaped duct. A pure absorber and a 50% scattering case are considered for each of the three problems. The solutions have been obtained with Ardra, a scalable, parallel neutron transport code developed at Lawrence Livermore National Laboratory (LLNL). The Ardra code takes advantage of a two-level parallelization strategy, which combines message passing between processing nodes and thread based parallelism amongst processors on each node. All calculations were performed on the IBM ASCI Blue-Pacific computer at LLNL.

Brown, P.N.; Chang, B.; Hanebutte, U.R.

1999-12-29T23:59:59.000Z

137

Energy transport by acoustic modes of harmonic lattices  

E-Print Network (OSTI)

We study the large scale evolution of a scalar lattice excitation which satisfies a discrete wave-equation in three dimensions. We assume that the dispersion relation associated to the elastic coupling constants of the wave-equation is acoustic, i.e., it has a singularity of the type |k| near the vanishing wave vector, k=0. To derive equations that describe the macroscopic energy transport we introduce the Wigner transform and change variables so that the spatial and temporal scales are of the order of epsilon. In the continuum limit, which is achieved by sending the parameter epsilon to 0, the Wigner transform disintegrates into three different limit objects: the transform of the weak limit, the H-measure and the Wigner-measure. We demonstrate that these three limit objects satisfy a set of decoupled transport equations: a wave-equation for the weak limit of the rescaled initial data, a dispersive transport equation for the regular limiting Wigner measure, and a geometric optics transport equation for the H-measure limit of the initial data concentrating to k=0. A simple consequence of our result is the complete characterization of energy transport in harmonic lattices with acoustic dispersion relations.

Lisa Harris; Jani Lukkarinen; Stefan Teufel; Florian Theil

2006-11-21T23:59:59.000Z

138

Systematic Review and Harmonization of Life Cycle GHG Emission Estimates for Electricity Generation Technologies (Presentation)  

SciTech Connect

This powerpoint presentation to be presented at the World Renewable Energy Forum on May 14, 2012, in Denver, CO, discusses systematic review and harmonization of life cycle GHG emission estimates for electricity generation technologies.

Heath, G.

2012-06-01T23:59:59.000Z

139

Optimal Estimation of Spherical Harmonic Components from a Sample with Spatially Nonuniform Covariance Statistics  

Science Conference Proceedings (OSTI)

An optimal estimation technique is presented to estimate spherical harmonic coefficients. This technique is based on the minimization of the mean square error. This optimal estimation technique consists of computing optimal weights for a given ...

Kwang-Y. Kim; Gerald R. North; Samuel S. Shen

1996-03-01T23:59:59.000Z

140

High-efficiency second-harmonic generation in doubly-resonant ?[superscript (2)] microring resonators  

E-Print Network (OSTI)

By directly simulating Maxwells equations via the finite-difference time-domain (FDTD) method, we numerically demonstrate the possibility of achieving high-efficiency second harmonic generation (SHG) in a structure ...

Bi, Zhuan-Fang

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While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
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141

Frequency-tunable second-harmonic submillimeter-wave gyrotron oscillators  

E-Print Network (OSTI)

This thesis reports the design and experimental demonstration of frequency-tunable submillimeter-wave gyrotrons operating in continuous wave (CW) at the second harmonic of the electron cyclotron frequency. An unprecedented ...

Sousa, Antonio C. Torrezan de (Antonio Carlos Torrezan de)

2010-01-01T23:59:59.000Z

142

Fast Spherical Harmonic Transform Routine FLTSS Applied to the Shallow Water Test Set  

Science Conference Proceedings (OSTI)

The fast spherical harmonic transform algorithm proposed by Suda and Takami is evaluated in the solutions of the shallow water equation test set defined by Williamson et al. through replacing the Legendre transforms of the NCAR spectral transform ...

Reiji Suda

2005-03-01T23:59:59.000Z

143

Relativistic second-harmonic generation of a laser from underdense plasmas  

Science Conference Proceedings (OSTI)

A high intensity laser obliquely incident on a vacuum-plasma interface produces second-harmonic radiation in the reflected component. The efficiency of second-harmonic generation increases with the angle of incidence, up to critical angle of incidence (our model is not valid beyond critical angle of incidence). The efficiency also depends on electron density, showing a maximum at {omega}{sub p}{sup 2}/{omega}{sup 2} congruent with 0.7, where {omega}{sub p} and {omega} are relativistic plasma frequency and laser frequency, respectively. The efficiency of second-harmonic generation increases sharply with laser intensity in the nonrelativistic regime and saturates at higher intensities. The intensity of the second harmonic is proportional to square of the laser intensity at low pump laser intensities and tends to proportional to laser intensity in the strong relativistic regime.

Singh, K.P.; Gupta, D.N.; Yadav, Sushila; Tripathi, V.K. [Computational Plasma Dynamics Laboratory, Mechanical Engineering, Kettering University, Flint, Michigan 48504 (United States); Department of Physics, Indian Institute of Technology, New Delhi 110016 (India)

2005-01-01T23:59:59.000Z

144

A continuous-wave second harmonic gyrotron oscillator at 460 GHz  

E-Print Network (OSTI)

We report the short pulse and CW operation of a 460 GHz gyrotron oscillator both at the fundamental (near 230 GHz) and second harmonic (near 460 GHz) of electron cyclotron resonance. During operation in a complete CW regime ...

Hornstein, Melissa K. (Melissa Kristen), 1977-

2005-01-01T23:59:59.000Z

145

The Harmonic Constant Datum Method: Options for Overcoming Datum Discontinuities at MixedDiurnal Tidal Transitions  

Science Conference Proceedings (OSTI)

The harmonic constant datum (HCD) method is a computationally efficient way of estimating tidal datums relative to mean sea level, without the need to compute long time series. However, datum discontinuities can occur between mixed and diurnal ...

Harold O. Mofjeld; Angie J. Venturato; Frank I. Gonzlez; Vasily V. Titov; Jean C. Newman

2004-01-01T23:59:59.000Z

146

Photovoltaic power converter system with a controller configured to actively compensate load harmonics  

DOE Patents (OSTI)

Photovoltaic power converter system including a controller configured to reduce load harmonics is provided. The system comprises a photovoltaic array and an inverter electrically coupled to the array to generate an output current for energizing a load connected to the inverter and to a mains grid supply voltage. The system further comprises a controller including a first circuit coupled to receive a load current to measure a harmonic current in the load current. The controller includes a second circuit to generate a fundamental reference drawn by the load. The controller further includes a third circuit for combining the measured harmonic current and the fundamental reference to generate a command output signal for generating the output current for energizing the load connected to the inverter. The photovoltaic system may be configured to compensate harmonic currents that may be drawn by the load.

de Rooij, Michael Andrew (Clifton Park, NY); Steigerwald, Robert Louis (Burnt Hills, NY); Delgado, Eladio Clemente (Burnt Hills, NY)

2008-12-16T23:59:59.000Z

147

Program on Technology Innovation: Evaluation of a Commercial Device for Measurement of Residential Transients and Harmonics  

Science Conference Proceedings (OSTI)

This report describes laboratory testing to evaluate the technical performance of the Microsurge Stetzer meter, a commercially available device for measuring electrical transients and harmonics on residential circuits. This device has been developed to measure low-level unwanted signals (higher-frequency harmonics and transients) introduced onto 50/60 Hz household mains through normal operation of appliances within the home and through other environmental signals and transients usually present on ...

2013-11-13T23:59:59.000Z

148

First Harmonic (2f) Characterisation of Resonant Frequency and Q-Factor of Micromechanical Transducers  

Science Conference Proceedings (OSTI)

In this paper, the response to the first harmonic component (2f) of the electrostatic force in single terminal driven electrostatic comb-drive and parallel-plate drive was used as a signal to extract device parameters, namely, the Q-factor and ... Keywords: Lorentzian curve-fitting, electrostatic drive, experimental modal analysis, first harmonic (2f), lock-in technique, resonance curve area (RCA)

V. J. Logeeswaran; F. E. H. Tay; M. L. Chan; F. S. Chau; Y. C. Liang

2003-10-01T23:59:59.000Z

149

Well-posed initial-boundary value problem for the harmonic Einstein equations using energy estimates  

E-Print Network (OSTI)

In recent work, we used pseudo-differential theory to establish conditions that the initial-boundary value problem for second order systems of wave equations be strongly well-posed in a generalized sense. The applications included the harmonic version of the Einstein equations. Here we show that these results can also be obtained via standard energy estimates, thus establishing strong well-posedness of the harmonic Einstein problem in the classical sense.

H. -O. Kreiss; O. Reula; O. Sarbach; J. Winicour

2007-07-27T23:59:59.000Z

150

High-order-harmonic generation in gas with a flat-top laser beam  

Science Conference Proceedings (OSTI)

We present experimental and numerical results on high-order-harmonic generation with a flat-top laser beam. We show that a simple binary tunable phase plate, made of two concentric glass plates, can produce a flat-top profile at the focus of a Gaussian infrared beam. Both experiments and numerical calculations show that there is a scaling law between the harmonic generation efficiency and the increase of the generation volume.

Boutu, W.; Auguste, T.; Binazon, L.; Gobert, O.; Carre, B. [Service des Photons, Atomes et Molecules, CEA-Saclay, FR-91191 Gif-sur-Yvette Cedex (France); Boyko, O.; Valentin, C. [Laboratoire d'Optique Appliquee, UMR 7639 ENSTA/CNRS/Ecole Polytechnique, FR-91761 Palaiseau (France); Sola, I.; Constant, E.; Mevel, E. [Universite de Bordeaux, CEA, CNRS UMR 5107, CELIA (Centre Lasers Intenses et Applications), FR-33400 Talence (France); Balcou, Ph. [Laboratoire d'Optique Appliquee, UMR 7639 ENSTA/CNRS/Ecole Polytechnique, FR-91761 Palaiseau (France); Universite de Bordeaux, CEA, CNRS UMR 5107, CELIA (Centre Lasers Intenses et Applications), FR-33400 Talence (France); Merdji, H. [Service des Photons, Atomes et Molecules, CEA-Saclay, FR-91191 Gif-sur-Yvette Cedex (France); PULSE Institute for Ultrafast Energy Science, Stanford Linear Accelerator Center, Stanford University, 2575 Sand Hill Road, Menlo Park, California 94025 (United States)

2011-12-15T23:59:59.000Z

151

High-harmonic XUV source for time- and angle-resolved photoemission spectroscopy  

Science Conference Proceedings (OSTI)

We present a laser-based apparatus for visible pump/XUV probe time- and angle-resolved photoemission spectroscopy (TRARPES) utilizing high-harmonic generation from a noble gas. Femtosecond temporal resolution for each selected harmonic is achieved by using a time-delay-compensated monochromator (TCM). The source has been used to obtain photoemission spectra from insulators (UO{sub 2}) and ultrafast pump/probe processes in semiconductors (GaAs).

Dakovski, Georgi L [Los Alamos National Laboratory; Li, Yinwan [Los Alamos National Laboratory; Durakiewicz, Tomasz [Los Alamos National Laboratory; Rodriguez, George [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

152

Harmonic mode competition in a terahertz gyrotron backward-wave oscillator  

Science Conference Proceedings (OSTI)

Electron cyclotron maser interactions at terahertz (THz) frequencies require a high-order-mode structure to reduce the wall loss to a tolerable level. To generate THz radiation, it is also essential to employ cyclotron harmonic resonances to reduce the required magnetic field strength to a value within the capability of the superconducting magnets. However, much weaker harmonic interactions in a high-order-mode structure lead to serious mode competition problems. The current paper addresses harmonic mode competition in the gyrotron backward wave oscillator (gyro-BWO). We begin with a comparative study of the mode formation and oscillation thresholds in the gyro-BWO and gyromonotron. Differences in linear features result in far fewer 'windows' for harmonic operation of the gyro-BWO. Nonlinear consequences of these differences are examined in particle simulations of the multimode competition processes in the gyro-BWO, which shed light on the competition criteria between modes of different as well as the same cyclotron harmonic numbers. The viability of a harmonic gyro-BWO is assessed on the basis of the results obtained.

Kao, S. H.; Chiu, C. C.; Chang, P. C.; Wu, K. L.; Chu, K. R. [Department of Physics, National Taiwan University, Taipei 106, Taiwan (China)

2012-10-15T23:59:59.000Z

153

Multidimensional high harmonic spectroscopy: A semi-classical perspective on measuring multielectron rearrangement upon ionization  

E-Print Network (OSTI)

High harmonic spectroscopy has the potential to combine attosecond temporal with sub-Angstrom spatial resolution of the early nuclear and multielectron dynamics in molecules. It involves strong field ionization of the molecule by the IR laser field followed by time-delayed recombination of the removed electron with the molecular ion. The time-delay is controlled on the attosecond time scale by the oscillation of the IR field and is mapped into the harmonic number, providing a movie of molecular dynamics between ionization and recombination. One of the challenges in the analysis of high harmonic signal stems from the fact that the complex dynamics of both ionization and recombination with their multiple observables are entangled in the harmonic signal. Disentangling this information requires multidimensional approach, capable of mapping ionization and recombination dynamics into different independent parameters. We suggest multidimensional high harmonic spectroscopy as a tool for characterizing of ionization and recombination processes separately allowing for simultaneous detection of both the ionization delays and sub-cycle ionization rates. Our method extends the capability of the two dimensional (2D) set-up suggested recently by Shafir et al on reconstructing ionization delays, while keeping the reconstruction procedure as simple as in the original proposal. The scheme is based on the optimization of the high harmonic signal in orthogonally polarized strong fundamental and relatively weak multicolour control fields.

Valeria Serbinenko; Olga Smirnova

2013-05-12T23:59:59.000Z

154

Dallam Sherman Hansford Ochiltree Lipscomb Hartley Moore Hutchinson  

E-Print Network (OSTI)

Gaines Dawson Borden Scurry Fisher Jones Shackelford Stephens Andrews Martin Howard Mitchell Nolan Taylor

155

Control of high-order harmonics for attoscience using a static-electric-field pattern  

Science Conference Proceedings (OSTI)

Quantum control in high-order-harmonic generation is considered theoretically by using a spatial distribution of static electric fields along the propagation direction of the driving field. It is shown that the trajectories of the electrons during its acceleration by the laser field in the high-harmonics-generation process can be controlled by periodically distributed static electric fields, which conveniently shape the driving laser field during propagation. Applying this mechanism, a quasi-phase-matching scheme that leads to filtered enhanced high harmonics is achieved. The harmonics in the plateau region are enhanced due to periodical phase variations in the long quantum trajectories as a consequence of the faster change experienced by the intensity-dependent phase along the longer electron trajectories. This effect should be observed in all quasi-phase-matching schemes based on perturbation of the microscopic quantum phase. The richness of adding a static-electric-field spatial pattern in the interaction region suggests a general scheme for feedback loop control in high-order-harmonic generation.

Serrat, Carles [UPC-Universitat Politecnica de Catalunya, Colom 11, E-08222 Terrassa (Barcelona) (Spain)

2011-12-15T23:59:59.000Z

156

Modeling of large aperture third harmonic frequency conversion of high power Nd:glass laser systems  

SciTech Connect

To provide high-energy, high-power beams at short wavelengths for inertial-confinement-fusion experiments, we routinely convert the 1.053-{mu}m output of the Nova, Nd:phosphate-glass, laser system to its third-harmonic wavelength. We describe performance and conversion efficiency modeling of the 3 {times} 3 arrays potassium-dihydrogen-phosphate crystal plates used for type II/type II phase-matched harmonic conversion of Nova 0.74-m diameter beams, and an alternate type I/type II phase-matching configuration that improves the third-harmonic conversion efficiency. These arrays provide energy conversion of up to 65% and intensity conversion to 70%. 19 refs., 11 figs.

Henesian, M.A.; Wegner, P.J.; Speck, D.R.; Bibeau, C.; Ehrlich, R.B.; Laumann, C.W.; Lawson, J.K.; Weiland, T.L.

1991-03-13T23:59:59.000Z

157

The Harmonic and Sideband Structure of the Kilohertz Quasi-Periodic Oscillations in Sco X-1  

E-Print Network (OSTI)

We use data from the Rossi X-ray Timing Explorer to search for harmonics and sidebands of the two simultaneous kilohertz quasi-periodic oscillations (kHz QPOs) in Sco X-1. We do not detect any of these harmonics or sidebands, with 95% confidence upper limits to their power between ~ 1% and ~ 10% of the power of the upper kHz QPO. The oscillations produced at these frequencies may be attenuated in a scattering corona around the neutron star. We find that upper limits to the unattenuated power of some of the strongest theoretically predicted harmonics and sidebands are as low as ~ 2% of the unattenuated power of the high-frequency QPO in Sco X-1.

Mariano Mendez; Michiel van der Klis

2000-06-19T23:59:59.000Z

158

Optimisation of An HHG-Seeded Harmonic Cascade FEL Design for the NLS Project  

Science Conference Proceedings (OSTI)

Optimization studies of an HHG-seeded harmonic cascade FEL design for the UK's proposed New Light Source (NLS) facility are presented. Three separate FELs are planned to meet the requirements for continuous coverage of the photon energy range 50-1000 eV with variable polarization, 20 fs pulse widths and good temporal coherence. The design uses an HHG seed source tuneable from 50-100 eV to provide direct FEL seeding in this range, and one or two stage harmonic cascades to reach the higher photon energies. Studies have been carried out to optimize a harmonic cascade FEL operating at 1 keV; topics investigated include modulator configuration, seed power level and ef- fects of the HHG seed structure. FEL simulations using realistic electron beam distributions are presented and tolerance to increased emittance has been considered.

Dunning, David; /Daresbury; Thompson, Neil; /Daresbury; Bartolini, Riccardo; /Oxford U., JAI; Geng, Huiping; /SLAC; Huang, Zhirong; /SLAC; McNeil, Brian; /Strathclyde U.

2012-06-25T23:59:59.000Z

159

Nonlinear harmonic generation and devices in doubly-resonant Kerr cavities  

E-Print Network (OSTI)

We describea theoretical analysis of the nonlinear dynamics of third-harmonic generation ($\\omega\\to3\\omega$) via Kerr ($\\chithree$) nonlinearities in a resonant cavity with resonances at both $\\omega$ and $3\\omega$. Such a doubly resonant cavity greatly reduces the required power for efficient harmonic generation, by a factor of $\\sim V/Q^2$ where $V$ is the modal volume and $Q$ is the lifetime, and can even exhibit 100% harmonic conversion efficiency at a critical input power. However, we show that it also exhibits a rich variety of nonlinear dynamics, such as multistable solutions and long-period limit cycles.We describe how to compensate for self/cross-phase modulation (which otherwise shifts the cavity frequencies out of resonance), and how to excite the different stable solutions (and especially the high-efficiency solutions) by specially modulated input pulses.

Hashemi, Hila; Joannopoulos, J D; Soljači?, Marin; Johnson, Steven G

2008-01-01T23:59:59.000Z

160

Watthour meter accuracy under controlled unbalanced harmonic voltage and current conditions  

SciTech Connect

This work presents the results of phase 1 of the project on the accuracy of watthour meters when subjected to closely-duplicated real-world unbalanced harmonic voltage and current conditions. Such real-world conditions involved differences in voltage and current magnitudes as well as differences in the voltage and current total harmonic distortion levels of each phase. Tests were performed on a selected sample of nine three-phase and three single-phase watthour meters. Some results showed that under a particular set of unbalanced waveforms with harmonic conditions of I{sub THD} > 80% and V{sub THD} > 2%, the percentage errors exhibited by these meters ranged from {minus}10.09% to +0.52%.

Domijan, A. Jr.; Embriz-Santander, E.; Gilani, A. [Univ. of Florida, Gainesville, FL (United States). Dept. of Electrical Engineering; Lamer, G.; Stiles, C.; Williams, C.W. Jr. [Florida Power Corp., St. Petersburg, FL (United States)

1996-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hartley harmon oldham" 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

Dynamic Analysis of Wind Turbine Planetary Gears Using an Extended Harmonic Balance Approach: Preprint  

DOE Green Energy (OSTI)

The dynamics of wind turbine planetary gears with gravity effects are investigated using an extended harmonic balance method that extends established harmonic balance formulations to include simultaneous internal and external excitations. The extended harmonic balance method with arc-length continuation and Floquet theory is applied to a lumped-parameter planetary gear model including gravity, fluctuating mesh stiffness, bearing clearance, and nonlinear tooth contact to obtain the planetary gear dynamic response. The calculated responses compare well with time domain integrated mathematical models and experimental results. Gravity is a fundamental vibration source in wind turbine planetary gears and plays an important role in system dynamics, causing hardening effects induced by tooth wedging and bearing-raceway contacts. Bearing clearance significantly reduces the lowest resonant frequencies of translational modes. Gravity and bearing clearance together lowers the speed at which tooth wedging occurs lower than the resonant frequency.

Guo, Y.; Keller, J.; Parker, R. G.

2012-06-01T23:59:59.000Z

162

High-order harmonic generation with Rydberg atoms by using an intense few-cycle pulse  

Science Conference Proceedings (OSTI)

We demonstrate that high-order harmonic generation (HHG) with both high cutoff frequency and high conversion efficiency can be realized by using a Rydberg atom in a few-cycle laser pulse. This is because a Rydberg state has a large electron orbital radius and small binding energy; therefore an electron in the Rydberg state can be ionized easily and accelerated directly toward the core under the interaction of a few-cycle laser pulse, leading to emission of harmonic photons. In this case, the tunneling process of the electron is not involved and, hence, the conversion efficiency and the cutoff frequency of harmonic generation can be higher than that predicted by the conventional three-step model.

Zhai Zhen; Fu Panming; Wang Bingbing [Laboratory of Optical Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080 (China); Zhu Qiren [Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012 (China); Chen Jing [Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China); Yan Zongchao [Department of Physics, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick E3B 5A3 (Canada)

2011-04-15T23:59:59.000Z

163

Application of Elliott's SU(3) model to the triaxially deformed harmonic oscillators  

SciTech Connect

We have introduced new bosons corresponding to the integral ratio of three frequencies for a harmonic oscillator potential, by means of a non-linear transformation which realizes the SU(3) group as a dynamical symmetry group, and which leaves the anisotropic harmonic oscillator Hamiltonian invariant. The classification of the single-particle levels based on this covering group predicts magic numbers depending on the deformation parameters {delta} and {gamma}. The special cases with tan {gamma} = 1/{radical}(3)({gamma} = 30 deg.) and {radical}(3)/5({gamma}{approx}19 deg.) are discussed.

Sugawara-Tanabe, Kazuko [Otsuma Women's University, Tama, Tokyo 206-8540 (Japan); Theoretical Nuclear Physics Laboratory, RIKEN Nishina Center, Wako, Saitama 351-0198 (Japan)

2011-05-06T23:59:59.000Z

164

A method for reducing harmonics in output voltages of a double-connected inverter  

SciTech Connect

A new method for reducing harmonics involved in output voltages of the double-connected inverter is proposed. By adding four auxiliary switching devices and an interphase transformer with secondary winding to the conventional 12-step inverter, output voltages of the proposed circuit can be almost the same waveforms as a conventional 36-step inverter. In this paper, circuit performances and output voltage waveforms are discussed, and the optimum parameters are derived. Then, effects on harmonic reductions can be clarified by theoretical and experimental results, and ratings of system components are investigated.

Masukawa, Shigeo; Iida, Shoji (Tokyo Denki Univ., Tokyo (Japan). Dept. of Electrical Engineering)

1994-09-01T23:59:59.000Z

165

Life Cycle GHG Emissions from Conventional Natural Gas Power Generation: Systematic Review and Harmonization (Presentation)  

SciTech Connect

This research provides a systematic review and harmonization of the life cycle assessment (LCA) literature of electricity generated from conventionally produced natural gas. We focus on estimates of greenhouse gases (GHGs) emitted in the life cycle of electricity generation from conventionally produced natural gas in combustion turbines (NGCT) and combined-cycle (NGCC) systems. A process we term "harmonization" was employed to align several common system performance parameters and assumptions to better allow for cross-study comparisons, with the goal of clarifying central tendency and reducing variability in estimates of life cycle GHG emissions. This presentation summarizes preliminary results.

Heath, G.; O'Donoughue, P.; Whitaker, M.

2012-12-01T23:59:59.000Z

166

Modeling and simulation of a single phase photovoltaic inverter and investigation of switching strategies for harmonic minimization  

Science Conference Proceedings (OSTI)

The aim of this paper is to build an EMTDC model of a single phase photovoltaic inverter and to investigate switching strategies for harmonic minimisation. For the simulation of this model, the PSCAD/EMTDC software package was used and the waveforms ... Keywords: EMTDC model, harmonic minimization, single-phase photovoltaic inverter

St. Kourtesi; L. Ekonomou; A. Nakulas; G. P. Fotis; E. Zoulias

2007-05-01T23:59:59.000Z

167

IEEE JOURNAL OF QUANTUM ELECTRONICS, VOL. 45, NO. 11, NOVEMBER 2009 1465 Cerenkov-Type Second-Harmonic Generation in  

E-Print Network (OSTI)

IEEE JOURNAL OF QUANTUM ELECTRONICS, VOL. 45, NO. 11, NOVEMBER 2009 1465 Cerenkov-Type Second the Cerenkov-type second-harmonic gen- eration in several different two-dimensional nonlinear photonic observe either single or double Cerenkov-like second-harmonic rings. We discuss the properties

Arie, Ady

168

Social-Psychological harmonic oscillators in the self-regulation of organizations and systems  

Science Conference Proceedings (OSTI)

We propose ab initio the existence of social-psychological harmonic oscillators (SPHO) acting computationally in the minds of an intelligent audience that a self-regulated collective exploits to solve problems, resolve complex issues, or entertain ... Keywords: conservation of information, incomplete information, interdependence

William F. Lawless; Donald A. Sofge

2012-06-01T23:59:59.000Z

169

A Multilevel Active Front-End Rectifier With Current Harmonic Compensation Capability  

E-Print Network (OSTI)

transformation. By controlling id and iq at the rectifier input side, the active and reactive power absorbed-q transformation requires a more complex hardware and software implementation. The power circuit topology-end rectifier that can absorb current harmonics generated by nonlinear loads connected to the same power

Rudnick, Hugh

170

A new spherical harmonics scheme for multi-dimensional radiation transport I. Static matter configurations  

Science Conference Proceedings (OSTI)

Recent work by McClarren and Hauck (2010) [31] suggests that the filtered spherical harmonics method represents an efficient, robust, and accurate method for radiation transport, at least in the two-dimensional (2D) case. We extend their work to the ... Keywords: Asymptotic diffusion limit, Discontinuous Galerkin, PN-method, Radiation transport

David Radice, Ernazar Abdikamalov, Luciano Rezzolla, Christian D. Ott

2013-06-01T23:59:59.000Z

171

Harmonic Generation at Lower Electron Energies for a Hard X-ray FEL  

SciTech Connect

There are several schemes currently being investigated to pre-bunch the electron beam and step the coherent bunching up to higher harmonics, all which require modulator sections which introduce additional energy modulation. X-ray FELs operate in a regime where the FEL parameter, {rho} is equal to or less than the effective energy spread introduced from the emittance in the electron beam. Because of this large effective energy spread, the energy modulation introduced from harmonic generation schemes would seriously degrade FEL performance. This problem can be mitigated by incorporating the harmonic generation scheme at a lower electron kinetic energy than the energy at the final undulator. This will help because the effective energy spread from emittance is reduced at lower energies, and can be further reduced by making the beam transversely large. Then the beam can be squeezed down slowly enough in the subsequent accelerator sections so that geometric debunching is mitigated. The beam size inside the dispersive chicanes and in the accelerator sections must be carefully optimized to avoid debunching, and each subharmonic modulator section must generate enough energy modulation to overcome the SASE noise without significantly increasing the gain length in the final undulator. Here we show analytical results that demonstrate the feasibility of this harmonic pre-bunching scheme.

Marksteiner, Quinn R. [Los Alamos National Laboratory

2011-01-01T23:59:59.000Z

172

Continuous vs. discrete models for the quantum harmonic oscillator and the hydrogen atom  

E-Print Network (OSTI)

The Kravchuk and Meixner polynomials of discrete variable are introduced for the discrete models of the harmonic oscillator and hydrogen atom. Starting from Rodrigues formula we construct raising and lowering operators, commutation and anticommutation relations. The physical properties of discrete models are figured out through the equivalence with the continuous models obtained by limit process.

M. Lorente

2004-01-15T23:59:59.000Z

173

Spectral analysis of non-commutative harmonic oscillators: the lowest eigenvalue and no crossing  

E-Print Network (OSTI)

The lowest eigenvalue of non-commutative harmonic oscillators $Q$ is studied. It is shown that $Q$ can be decomposed into four self-adjoint operators, and all the eigenvalues of each operator are simple. We show that the lowest eigenvalue $E$ of $Q$ is simple. Furthermore a Jacobi matrix representation of $Q$ is given and spectrum of $Q$ is considered numerically.

Fumio Hiroshima; Itaru Sasaki

2013-04-20T23:59:59.000Z

174

Fabrication of band-gap structures in planar nonlinear waveguides for second harmonic generation  

Science Conference Proceedings (OSTI)

The work presented here deals with the design and fabrication of the linear grating on a LiNbO3 planar waveguide to obtain an efficient second harmonic generation operating in Cerenkov configuration. The lithium niobate is a nonlinear material ... Keywords: e-beam lithography, nonlinear optics

V. Foglietti; E. Cianci; D. Pezzetta; C. Sibilia; M. Marangoni; R. Osellame; R. Ramponi

2003-06-01T23:59:59.000Z

175

Transient and harmonic voltages associated with automated capacitor switching on distribution systems  

SciTech Connect

One of the functions proposed for distribution automation systems is automated capacitor switching to control power factor and voltage profile on feeder circuits. This is one of the functions being implemented as part of the Athens Automation and Control Experiment on the Athens Utilities Board (AUB) in Athens, Tennessee. A concern with automated capacitor switching is the increase in harmonic and transient voltages due to different capacitor configurations on the distribution system. A study was performed to evaluate the impact of the automated capacitor switching on the AUB distribution system. The study has identified problem areas, methods for determining the problem areas, and possible solutions. The substation capacitor banks were found to be the dominant factor in both the transient and harmonic responses of the distribution system. The harmonic response of the system is dominated by the parallel inductance/capacitance of the circuit comprised of the substation capacitor and equivalent source reactance at the substation. The transient analyses indicated that when the substation capacitor is energized, magnified transient voltages can occur at switched-in feeder capacitors. An evaluation of the effect of automated capacitor switching is necessary to properly design the automated capacitor switching schemes and the required arrester protection for any harmonic and/or transient overvoltage contingency.

Rizy, D.T.; Gunther, E.W.; Mc Granaghan, M.F.

1987-08-01T23:59:59.000Z

176

Transient and harmonic voltages associated with automated capacitor switching on distribution systems  

SciTech Connect

One of the functions proposed for distribution system automation is automated capacitor switching to control power factor and voltage profile on feeder circuits. This is one of the functions being implemented as part of the Athens Automation and Control Experiment on the Athens Utilities Board (AUB) in Athens, Tennessee. A concern with automated capacitor switching is the increase in harmonic and transient voltages due to different capacitor configurations on the distribution system. A study was performed to evaluate the impact of the automated capacitor switching on the AUB distribution system. The study has identified problem areas, methods for determining the problem areas and possible solutions. The substation capacitor banks were found to be the dominant factor in both the transient and harmonic responses of the distribution system. The harmonic response of the system is dominated by the parallel inductance/capacitance of the circuit comprised of the substation capacitor and equivent source reactance at the substation. The transient analyses found that when the substation capacitor is energized, magnified transient voltages can occur at switched in feeder capacitors. An evaluation of the effect of automated capacitor switching is necessary to properly design tha automated capacitor switching schemes and the required arrester protection for any harmonic and/or transient overvoltage contingency.

Rizy, D.T.; Gunther, E.W.; McGranaghan, M.F.

1986-01-01T23:59:59.000Z

177

Wave absorption at the second harmonic of the electron-cyclotron frequency in a tokamak plasma  

SciTech Connect

Wave absorption in the ISX-B tokamak (Phys. Rev. Lett. 44, 647 (1980)) at the second harmonic (..omega.. = 2..omega../sub c/e) of the electron-cyclotron frequency is reported. Measurements of the absorption of a wave polarized in the extraordinary mode and propagating perpendicular to the toroidal magnetic field are in agreement with computations.

McDermott, F.S.; Bekefi, G.; England, A.C.; Attenberger, S.E.; Batchelor, D.B.; Edmonds, P.H.; Goldfinger, R.C.; Kindsfather, R.R.; Lazarus, E.A.; Murakami, M.

1985-08-01T23:59:59.000Z

178

Three-halves harmonic emission from a laser filament in a plasma channel  

SciTech Connect

A self-trapped laser filament is susceptible to decay-producing radially localized Langmuir waves. A nonlinear interaction of the pump wave with the density oscillation at the Langmuir frequency gives rise to three-halves harmonic emissions. Using a basis-function expansion technique, the emitted power in the backward direction is obtained. It decreases with the increasing size of the filament.

Mishra, G.; Talukdar, I.; Tripathi, V.; Tripathi, V.K. (Indian Inst. of Tech., New Delhi (India). Dept. of Physics)

1989-12-01T23:59:59.000Z

179

High conversion efficiency pumped-cavity second harmonic generation of a diode laser  

Science Conference Proceedings (OSTI)

To investigate the feasibility of producing a compact, efficient blue laser source, pumped-cavity second harmonic generation of diode lasers was explored. It is desirable to have such lasers to increase optical disk storage density, for color displays and for under-the-sea green-blue optical signal transmission. Based on assumed cavity losses, a cavity was designed and numerical analysis predicted an overall conversion efficiency to the second harmonic wavelength of 76% from a 75 mW diode laser. The diode laser used in these experiments had a single longitudinal and a single transverse mode output at 860 nm. The best conversion efficiency obtained (26%) was less than optimum due to the 2.5% single-pass linear losses associated with the cavity. However, calculations based on these higher losses are in good agreement with the experimentally determined values. In additions, a factor of 1.65 increase in the second harmonic output power is anticipated by reducing the input mirror reflectivity to better impedance-match the cavity. With this relatively low second harmonic conversion, the power to light conversion is 7.8%.

Keicher, D.M.

1994-01-01T23:59:59.000Z

180

A Harmonic-Fourier Spectral Limited-Area Model with an External Wind Lateral Boundary Condition  

Science Conference Proceedings (OSTI)

In comparison to the Tatsumis spectral method, the harmonic-Fourier spectral method has two major advantages. 1) The semi-implicit scheme is quite efficient because the solutions of the Poisson and Helmholtz equations are readily derived. 2) The ...

Qiu-shi Chen; Le-sheng Bai; David H. Bromwich

1997-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hartley harmon oldham" 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

High-order harmonics from bow wave caustics driven by a high-intensity laser  

Science Conference Proceedings (OSTI)

We propose a new mechanism of high-order harmonic generation during an interaction of a high-intensity laser pulse with underdense plasma. A tightly focused laser pulse creates a cavity in plasma pushing electrons aside and exciting the wake wave and the bow wave. At the joint of the cavity wall and the bow wave boundary, an annular spike of electron density is formed. This spike surrounds the cavity and moves together with the laser pulse. Collective motion of electrons in the spike driven by the laser field generates high-order harmonics. A strong localization of the electron spike, its robustness to oscillations imposed by the laser field and, consequently, its ability to produce high-order harmonics is explained by catastrophe theory. The proposed mechanism explains the experimental observations of high-order harmonics with the 9 TW J-KAREN laser (JAEA, Japan) and the 120 TW Astra Gemini laser (CLF RAL, UK) [A. S. Pirozhkov, et al., arXiv:1004.4514 (2010); A. S. Pirozhkov et al, AIP Proceedings, this volume]. The theory is corroborated by high-resolution two-and three-dimensional particle-in-cell simulations.

Pirozhkov, A.S.; Kando, M.; Esirkepov, T.Zh. [Advanced Beam Technology Division, Japan Atomic Energy Agency (Japan); and others

2012-07-11T23:59:59.000Z

182

SMI 2011: Full Paper: Interactive 3D caricature from harmonic exaggeration  

Science Conference Proceedings (OSTI)

A common variant of caricature relies on exaggerating characteristics of a shape that differs from a reference template, usually the distinctive traits of a human portrait. This work introduces a caricature tool that interactively emphasizes the differences ... Keywords: Caricature, GPU, Interactive, Manifold harmonics, Modeling

Thomas Lewiner; Thales Vieira; Dimas Martnez; Adelailson Peixoto; Vincius Mello; Luiz Velho

2011-06-01T23:59:59.000Z

183

Life Cycle Greenhouse Gas Emissions of Crystalline Silicon Photovoltaic Electricity Generation: Systematic Review and Harmonization  

Science Conference Proceedings (OSTI)

Published scientific literature contains many studies estimating life cycle greenhouse gas (GHG) emissions of residential and utility-scale solar photovoltaics (PVs). Despite the volume of published work, variability in results hinders generalized conclusions. Most variance between studies can be attributed to differences in methods and assumptions. To clarify the published results for use in decision making and other analyses, we conduct a meta-analysis of existing studies, harmonizing key performance characteristics to produce more comparable and consistently derived results. Screening 397 life cycle assessments (LCAs) relevant to PVs yielded 13 studies on crystalline silicon (c-Si) that met minimum standards of quality, transparency, and relevance. Prior to harmonization, the median of 42 estimates of life cycle GHG emissions from those 13 LCAs was 57 grams carbon dioxide equivalent per kilowatt-hour (g CO{sub 2}-eq/kWh), with an interquartile range (IQR) of 44 to 73. After harmonizing key performance characteristics, irradiation of 1,700 kilowatt-hours per square meter per year (kWh/m{sup 2}/yr); system lifetime of 30 years; module efficiency of 13.2% or 14.0%, depending on module type; and a performance ratio of 0.75 or 0.80, depending on installation, the median estimate decreased to 45 and the IQR tightened to 39 to 49. The median estimate and variability were reduced compared to published estimates mainly because of higher average assumptions for irradiation and system lifetime. For the sample of studies evaluated, harmonization effectively reduced variability, providing a clearer synopsis of the life cycle GHG emissions from c-Si PVs. The literature used in this harmonization neither covers all possible c-Si installations nor represents the distribution of deployed or manufactured c-Si PVs.

Hsu, D. D.; O'Donoughue, P.; Fthenakis, V.; Heath, G. A.; Kim, H. C.; Sawyer, P.; Choi, J. K.; Turney, D. E.

2012-04-01T23:59:59.000Z

184

VII Hotine-Marussi Symposium on Theoretical Geodesy, 6-10 July 2009, Rome, Italy. Performance analysis of isotropic spherical harmonic spectral windows  

E-Print Network (OSTI)

analysis of isotropic spherical harmonic spectral windows B. Devaraju and N. Sneeuw Institute of Geodesy isotropic spherical harmonic spectral windows in the spa- tial domain. The parameters are devised in order to answer the following question: If an isotropic spherical harmonic window is applied in the spectral

Stuttgart, Universität

185

Modeling of Synergy Between 4th and 6th Harmonic Absorptions of Fast Waves on Injected Beams in DIII-D Tokamak  

SciTech Connect

In recent moderate to high harmonic fast wave heating and current drive experiments in DIII-D, a synergy effect was observed when the 6{sup th} harmonic 90 MHz fast wave power is applied to the plasma preheated by neutral beams and the 4{sup th} harmonic 60 MHz fast wave. In this paper, we investigate how the synergy can occur using ORBIT-RF coupled with AORSA. Preliminary simulations suggest that damping of 4{sup th} harmonic FW on beam ions accelerates them above the injection energy, which may allow significant damping of 6{sup th} harmonic FW on beam ion tails to produce synergy.

Choi, M.; Pinsker, R. I.; Chan, V. S. [General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States); Muscatello, C. M. [University of California-Irvine, Irvine, California, 92697 (United States); Jaeger, E. F. [XCEL Engineering Inc., Oak Ridge, Tennessee 37830 (United States)

2011-12-23T23:59:59.000Z

186

Harmonizing Global Metrics for Data Center Energy Efficiency (February 2, 2010)  

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

Harmonizing Global Metrics for Data Center Energy Efficiency Harmonizing Global Metrics for Data Center Energy Efficiency The United States of America, European Union and Japan Reach Agreement on Guiding Principles for Data Center Energy Efficiency Metrics February 2, 2010 As business demands and energy costs for data centers rise, owners and operators have focused on the energy efficiency of the data center as a whole, frequently using energy efficiency metrics. However, the metrics are not always applied clearly and consistently at a global level. To address these inconsistencies, a group of global leaders met on February 2, 2010 to agree on data center energy efficiency measurements, metrics, and reporting conventions. Organizations represented were the U.S. Department of Energy's Save Now and Federal Energy Management Programs,

187

A feasibility study of low-order harmonics expansion applied to loading pattern search  

SciTech Connect

Despite significant progress in core loading pattern search methods over years, there still remains the issue of large computing workload and the need for improving the speed of evaluating loading pattern candidates during the search process. This paper focuses on improving the computing speed for loading pattern evaluation, rather than the method of searching for the patterns. A low order harmonics expansion method for flux distribution representation is proposed for fast LP evaluation application. The novel feature of the method is the separation of the short range local perturbation effect from the long range global tilt effect. The latter effect can be captured by low order harmonics expansion. Demonstration examples are presented to show that even for extremely large perturbations induced by fuel shuffling the proposed method can accurately calculate the flux distribution for the LP with very minimal computation. (authors)

Shaohong, Z.; Dong, L.; Tao, W. [Shanghai Jiao Tong Univ., 1954 Hua Shan Road, Shanghai, 200030 (China); Chao, Y. A. [Westinghouse Electric Company, P. O. Box 355, Pittsburgh, PA 15230-0355 (United States)

2006-07-01T23:59:59.000Z

188

Investigations of Low and Moderate Harmonic Fast Wave Physics on CDX-U  

DOE Green Energy (OSTI)

Third harmonic hydrogen cyclotron fast wave heating studies are planned in the near term on CDX-U to investigate the potential for bulk ion heating. In preparation for these studies, the available radio-frequency power in CDX-U has been increased to 0.5 MW. The operating frequency of the CDX-U radio-frequency transmitter was lowered to operate in the range of 8-10 MHz, providing access to the ion harmonic range 2* {approx} 4* in hydrogen. A similar regime is accessible for the 30 MHz radio-frequency system on the National Spherical Torus Experiment (NSTX), at 0.6 Tesla in hydrogen. Preliminary computational studies over the plasma regimes of interest for NSTX and CDX-U indicate the possibility of strong localized absorption on bulk ion species.

J. Spaleta; R. Majeski; C.K. Phillips; R.J. Dumont; R. Kaita; V. Soukhanovskii; L. Zakharov

2003-07-14T23:59:59.000Z

189

Two particle correlation measurements with respect to higher harmonic event planes at PHENIX  

E-Print Network (OSTI)

Measurements of two particle azimuthal correlations in relativistic heavy ion collisions provide information of the possible interplay between hard-scattered partons and the hot-dense medium. Toward an understanding of parton-medium coupling, it is indispensable to obtain correlations where contributions from higher harmonic flow($v_n$) are rejected. It is also important to produce correlation measurements where the trigger particle is selected relative to second and third order event planes. This enables us to explore path-length dependence of parton energy loss and the influence of the medium on the jets. We present the latest PHENIX results of correlations in which contributions from higher harmonic flow have been subtracted, as well as second and third order event plane-dependent correlations in Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV.

Takahito Todoroki for the PHENIX Collaboration

2013-04-10T23:59:59.000Z

190

Multiple layer optical memory system using second-harmonic-generation readout  

DOE Patents (OSTI)

A novel optical read and write information storage system is described which comprises a radiation source such as a laser for writing and illumination, the radiation source being capable of radiating a preselected first frequency; a storage medium including at least one layer of material for receiving radiation from the radiation source and capable of being surface modified in response to said radiation source when operated in a writing mode and capable of generating a pattern of radiation of the second harmonic of the preselected frequency when illuminated by the radiation source at the preselected frequency corresponding to the surface modifications on the storage medium; and a detector to receive the pattern of second harmonic frequency generated.

Boyd, Gary T. (Woodbury, MN); Shen, Yuen-Ron (Berkeley, CA)

1989-01-01T23:59:59.000Z

191

A frequency scanning method for the identification of harmonic instabilities in HVDC systems  

SciTech Connect

A Frequency Scanning Method is introduced in the paper to obtain a more accurate frequency characteristic for identifying harmonic instability in HVdc systems. An example of the application is used to identify the resonance frequencies in the CIGRE benchmark model. The paper shows that the Benchmark model is not tuned to the resonance frequency that it was designed for. Using the scanning method, the resonance frequency of the benchmark model may be shifted to demonstrate a simulation of core-saturation type instability.

Jiang, X.; Gole, A.M. [Univ. of Manitoba, Winnipeg, Manitoba (Canada). Dept. of Electrical and Computer Engineering

1995-10-01T23:59:59.000Z

192

High harmonic attosecond pulse train amplification in a free electron laser  

SciTech Connect

It is shown using three-dimensional simulations that the temporal structure of an attosecond pulse train, such as that generated via high harmonic generation in noble gases, may be retained in a free electron laser amplifier through to saturation using a mode-locked optical klystron configuration. At wavelengths of {approx}12 nm, a train of attosecond pulses of widths {approx}300 as with peak powers in excess of 1 GW are predicted.

McNeil, B.W.; Sheehy, B.; Thompson, N.R.; Dunning, D.J.

2011-03-04T23:59:59.000Z

193

Second harmonic nano-particles for femtosecond coherent control on the nanoscale  

E-Print Network (OSTI)

We provide a complete toolkit for coherent control experiments on the nano-scale. By exploiting the second harmonic emission from single (150 nm) nonlinear nano-particles, we show that ultrafast femtosecond laser pulses can be compressed and controlled in time with unprecedented spatial accuracy. The method is tested on various nano-particles of different sizes, shapes and materials, both dielectric BaTiO3, Fe(IO3)3) and metallic (Au) thus demonstrating its robustness and versatility.

Accanto, Nicol; Piatkowski, Lukasz; Castro-Lopez, Marta; Pastorelli, Francesco; Brinks, Daan; van Hulst, Niek F

2013-01-01T23:59:59.000Z

194

Quasi-phase matching and quantum control of high harmonic generation in waveguides using counterpropagating beams  

DOE Patents (OSTI)

All-optical quasi-phase matching (QPM) uses a train of counterpropagating pulses to enhance high-order harmonic generation (HHG) in a hollow waveguide. A pump pulse enters one end of the waveguide, and causes HHG in the waveguide. The counterpropagation pulses enter the other end of the waveguide and interact with the pump pulses to cause QPM within the waveguide, enhancing the HHG.

Zhang, Xiaoshi (Superior, CO); Lytle, Amy L. (Boulder, CO); Cohen, Oren (Boulder, CO); Kapteyn, Henry C. (Boulder, CO); Murnane, Margaret M. (Boulder, CO)

2010-11-09T23:59:59.000Z

195

Life Cycle Greenhouse Gas Emissions of Coal-Fired Electricity Generation: Systematic Review and Harmonization  

Science Conference Proceedings (OSTI)

This systematic review and harmonization of life cycle assessments (LCAs) of utility-scale coal-fired electricity generation systems focuses on reducing variability and clarifying central tendencies in estimates of life cycle greenhouse gas (GHG) emissions. Screening 270 references for quality LCA methods, transparency, and completeness yielded 53 that reported 164 estimates of life cycle GHG emissions. These estimates for subcritical pulverized, integrated gasification combined cycle, fluidized bed, and supercritical pulverized coal combustion technologies vary from 675 to 1,689 grams CO{sub 2}-equivalent per kilowatt-hour (g CO{sub 2}-eq/kWh) (interquartile range [IQR]= 890-1,130 g CO{sub 2}-eq/kWh; median = 1,001) leading to confusion over reasonable estimates of life cycle GHG emissions from coal-fired electricity generation. By adjusting published estimates to common gross system boundaries and consistent values for key operational input parameters (most importantly, combustion carbon dioxide emission factor [CEF]), the meta-analytical process called harmonization clarifies the existing literature in ways useful for decision makers and analysts by significantly reducing the variability of estimates ({approx}53% in IQR magnitude) while maintaining a nearly constant central tendency ({approx}2.2% in median). Life cycle GHG emissions of a specific power plant depend on many factors and can differ from the generic estimates generated by the harmonization approach, but the tightness of distribution of harmonized estimates across several key coal combustion technologies implies, for some purposes, first-order estimates of life cycle GHG emissions could be based on knowledge of the technology type, coal mine emissions, thermal efficiency, and CEF alone without requiring full LCAs. Areas where new research is necessary to ensure accuracy are also discussed.

Whitaker, M.; Heath, G. A.; O'Donoughue, P.; Vorum, M.

2012-04-01T23:59:59.000Z

196

Three-dimensional N=4 supersymmetry in harmonic N=3 superspace  

E-Print Network (OSTI)

We consider the map of three-dimensional N=4 superfields to N=3 harmonic superspace. The left and right representations of the N=4 superconformal group are constructed on N=3 analytic superfields. These representations are convenient for the description of N=4 superconformal couplings of the Abelian gauge superfields with hypermultiplets. We analyze the N=4 invariance in the non-Abelian N=3 Yang-Mills theory.

B. M. Zupnik

2010-05-26T23:59:59.000Z

197

Lattice Monte Carlo calculations for unitary fermions in a harmonic trap  

Science Conference Proceedings (OSTI)

We present a lattice Monte Carlo approach developed for studying large numbers of strongly interacting nonrelativistic fermions and apply it to a dilute gas of unitary fermions confined to a harmonic trap. In place of importance sampling, our approach makes use of high statistics, an improved action, and recently proposed statistical techniques. We show how improvement of the lattice action can remove discretization and finite volume errors systematically. For N=3 unitary fermions in a box, our errors in the energy scale as the inverse lattice volume, and we reproduce a previous high-precision benchmark calculation to within our 0.3% uncertainty; as additional benchmarks we reproduce precision calculations of N=3,...,6 unitary fermions in a harmonic trap to within our {approx}1% uncertainty. We then use this action to determine the ground-state energies of up to 70 unpolarized fermions trapped in a harmonic potential on a lattice as large as 64{sup 3}x72. In contrast to variational calculations, we find evidence for persistent deviations from the thermodynamic limit for the range of N considered.

Endres, Michael G.; Kaplan, David B.; Lee, Jong-Wan; Nicholson, Amy N. [Physics Department, Columbia University, New York, New York 10027 (United States); Theoretical Research Division, RIKEN Nishina Center, Wako, Saitama 351-0198 (Japan); Institute for Nuclear Theory, University of Washington, Seattle, Washington 98195-1550 (United States)

2011-10-15T23:59:59.000Z

198

The Significance to Quantum Computing of the Classical Harmonic Nature of Energy Eigenstates  

E-Print Network (OSTI)

Since a pure quantum system is incapable of faithfully simulating the solutions of the Schroedinger equation that actually pertains to itself, it is proposed that quantum computing technology (as opposed to cryptographic technology) not be based on pure quantum systems such as qubits but instead on physical systems which by their nature faithfully simulate the solutions of Schroedinger equations. Every Schroedinger equation is within a unitary transformation of being a set of mutually independent classical simple harmonic oscillator equations. Thus classical simple harmonic oscillators, or "chobits", are the mathematically fundamental building blocks for all Schroedinger equations. In addition, classical harmonic oscillators are, as a practical matter, far easier to deal with than any pure quantum system -- e.g., their phases and absolute amplitudes are readily physically accessible, they have little predilection for environmental decoherence, and they abound as cavity electromagnetic standing-wave modes. We study in mathematical detail the use of chobits to compute discrete quantum Fourier transforms, including gates, chobit counts, and chobit operation counts. The results suggest that thirty chobits and under a thousand chobit phase operations could generate discrete quantum Fourier transforms of a billion terms. Chobits can be technologically realized as semiconductor dynatron-type electronic oscillator circuits, which ought to be amenable to very considerable miniaturization.

Steven Kenneth Kauffmann

2012-10-20T23:59:59.000Z

199

Nonlinear harmonic modeling of phemt devices for increased power amplifier efficiencies  

E-Print Network (OSTI)

This thesis is a comprehensive study of how harmonic terminations can greatly increase a power amplifier's efficiency (PAE). To show this improvement, the PHEMT amplifier is biased in the low noise region of operation (L, = 20 mA, Vd, = 3 V) and operated at a frequency of 2.2 GHz. An attempt is made to generate a working model which characterizes the amplifier's performance with and without harmonic termination. Both measured and modeled data are compared in order to verify the model's performance. Once a working model is realized, the designing of an amplifier can be done by simulation without the cumbersome task of taking measurements. The measured data is obtained using an electronic load pull system which is capable of rapid data acquisition. This study shows that when harmonic termination is used, the PAE can improve in some cases by about 15 % depending upon the operating conditions of the device. This improved PA-E can result in longer operational lifetimes of devices such as cellular phones and reduce the size of these units. Longer lifetimes are extremely important especially for space applications where replacement of power supplies is very costly. Power measurements as well as relevant intermodulation distortion measurements are also done for Class A and Class B operation in order to show the advantages and disadvantages of each.

Strassner, Bernd Herbert

1997-01-01T23:59:59.000Z

200

DoublingAdding Method for Delta-Four-Stream Spherical Harmonic Expansion Approximation in Radiative Transfer Parameterization  

Science Conference Proceedings (OSTI)

Though the single-layer solutions have been found for the ?-four-stream spherical harmonic expansion method (SHM) in radiative transfer, there is lack of a corresponding doublingadding method (4SDA), which enables the calculation of radiative ...

Feng Zhang; Jiangnan Li

2013-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "hartley harmon oldham" 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

Methods, systems and apparatus for approximation of peak summed fundamental and third harmonic voltages in a multi-phase machine  

DOE Patents (OSTI)

Methods, system and apparatus are provided for quickly approximating a peak summed magnitude (A) of a phase voltage (Vph) waveform in a multi-phase system that implements third harmonic injection.

Ransom, Ray M. (Big Bear City, CA); Gallegos-Lopez, Gabriel (Torrance, CA); Kinoshita, Michael H. (Redondo Beach, CA)

2012-07-31T23:59:59.000Z

202

Electron Dynamics of Silicon Surface States: Second-Harmonic Hole Burning on Si(111)7x7  

E-Print Network (OSTI)

States: Second-Harmonic Hole Burning on Si(111) 7 7 John A.transient spectral hole burning. Spectral holes induced by atransient spectral hole burning, i.e. , the surface-speci?c

McGuire, John A.; Raschke, Markus B.; Shen, Yuen-Ron

2005-01-01T23:59:59.000Z

203

Step-by-Step Instructions  

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

Texas based Texas based upon the simple prescriptive option of the 2012 IECC. It does not provide a guarantee for meeting the IECC. This guide is not designed to reflect the actual energy code, with amendments, if any, adopted in Texas and does not, therefore, provide a guarantee for meeting the state energy code. For details on the energy code adopted by Texas, including how it may differ from the IECC, please contact your local building code official. Additional copies of this guide are available on www.reca-codes.com. CLIMATE ZONE 4 Armstrong Cochran Gray Hutchinson Oldham Sherman Bailey Dallam Hale Lamb Parmer Swisher Briscoe Deaf Smith Hansford Lipscomb Potter Yoakum Carson Donley Hartley Moore Randall Castro Floyd Hockley Ochiltree Roberts

204

Power Quality Mitigation Technology Demonstration at Industrial Customer Sites: Industrial and Utility Harmonic Mitigation Guideline s and Case Studies  

Science Conference Proceedings (OSTI)

However the restructuring of the electric power industry shakes out, the commercial/industrial customer's need for quality power will increase; and customer service will remain a key to retaining current accounts and attracting new customers. The need for demonstrating new harmonics mitigation technologies will thus be an important factor for the wire side of the business as well as for energy service companies. This report provides guidelines for implementing harmonics mitigation demonstration projects ...

2000-11-30T23:59:59.000Z

205

Filamentation-induced third-harmonic generation in air via plasma-enhanced third-order susceptibility  

Science Conference Proceedings (OSTI)

We study, both experimentally and theoretically, the underlying physics of third-harmonic generation in air by a filamented infrared femtosecond laser pulse propagating through a thin plasma channel. It is shown that the recently observed more than two-order-of-magnitude increase of the efficiency of third-harmonic generation occurs due to the plasma-enhanced third-order susceptibility. An estimate of the effective value of this susceptibility is given.

Suntsov, S.; Abdollahpour, D.; Tzortzakis, S. [Institute of Electronic Structure and Laser, Foundation for Research and Technology Hellas, 71110, Heraklion (Greece); Papazoglou, D. G. [Institute of Electronic Structure and Laser, Foundation for Research and Technology Hellas, 71110, Heraklion (Greece); Materials Science and Technology Department, University of Crete, 71003, Heraklion (Greece)

2010-03-15T23:59:59.000Z

206

Opportunities for regional harmonization of appliance standards and l abeling program  

SciTech Connect

The South Asian Regional Initiative for Energy (SARI/Energy) calls for a series of activities to promote Energy Efficiency Standards and Labeling (EES&L) of end use appliances in the region. In pursuit of this goal, the project supports several seminars and meetings that bring together policymakers and stakeholders from throughout the region. The purpose of these gatherings is to encourage a dialogue among participants as to the benefits and barriers associated with EES&L programs. In addition, it is the role of the program organizers to provide participants with the technical details necessary to make progress towards effective efficiency programs. One component of the initiative is to encourage the harmonization (alignment) of existing program components, and the pursuit of new programs coordinated at the regional level. In support of this goal, the report provides information aimed at motivating and enabling cooperative activities which will provide concrete benefits to programs in each country, whether well developed, or still in the initial planning stage. It should be emphasized that the underlying objective of the harmonization component of the SARI/Energy project is to increase the potential for success of EES&L programs of all countries involved, and to reduce burdens on manufacturers, exporters and importers in each country. Harmonization ''for it's own sake'' is not desirable, nor is it suggested that policymakers should bring their programs in line with international norms if doing so would present a disadvantage to their own efficiency programs, or to commercial interests within their country. If there is no such disadvantage, however, the program encourages alignment of policies and provides a forum at which this alignment can be pursued. The report covers several main topics, with varying emphasis. First, a general discussion of the motivation for an explicit policy of regional harmonization is given. Next, the current status of existing programs in the region are discussed in some detail. The section that follows covers the harmonization of efficiency test procedures. Special attention is given to this component of an EES&L program because it is the most critical element in terms of harmonization--having incompatible test procedures between trade partners can greatly impact the effectiveness of a program, and it can also unduly impact trade. Currently, policymakers in India and Sri Lanka are collaborating with the goal of aligning refrigerator test procedures used in their respective programs. For this reason, the section on test procedures of refrigerators goes into a significant amount of technical detail, in order to provide the clearest possible articulation of issues to be resolved in bringing the procedures into alignment. Following the discussion of test procedures, the report contains a section each on harmonization of efficiency rating levels, development of label designs, and enforcement issues. The report is organized such that the sections covering current programs and test procedures are subdivided by target appliance. These sections are further divided by country, where applicable. Each section is concluded with recommendations.

McNeil, Michael A.

2003-09-01T23:59:59.000Z

207

iHarmonizer: improving the disk efficiency of I/O-intensive multithreaded codes  

SciTech Connect

Challenged by serious power and thermal constraints, and limited by available instruction-level parallelism, processor designs have evolved to multi-core architectures. These architectures, many augmented with native simultaneous multithreading, are driving software developers to use multithreaded programs to exploit thread-level parallelism. While multithreading is well-known to introduce concerns of data dependency and CPU load balance, less known is that the uncertainty of relative progress of thread execution can cause patterns of I/O requests, issued by different threads, to be effectively random and so significantly degrade hard-disk efficiency. This effect can severely offset the performance gains from parallel execution, especially for I/O-intensive programs. Retaining the benefits of multithreading while not reducing I/O efficiency is an urgent and challenging problem. We propose a user-level scheme, iHarmonizer, to streamline the servicing of I/O requests from multiple threads in OpenMP programs. Specifically, we use the compiler to insert code into OpenMP programs so that data usage can be transmitted at run time to a supporting run-time library; this library in turn prefetches data in a disk-friendly way and coordinates threads execution according to the availability of their requested data. Transparently to the programmer, iHarmonizer makes a multithreaded program I/O efficient while maintaining the benefits of parallelism. Our experiments show that iHarmonizer can significantly speed up the execution of a representative set of I/O-intensive scientific benchmarks.

Davis, Marion Kei [Los Alamos National Laboratory; Wang, Yizhe [WAYNE STATE UNIV.; Jiang, Song [WAYNE STATE UNIV.

2010-01-01T23:59:59.000Z

208

Study of second harmonic generation by high power laser beam in magneto plasma  

SciTech Connect

This paper examines the problem of nonlinear generation of second harmonic of a high power laser pulse propagating in magnetized plasma. The propagation of strong laser beam is proposed in the direction perpendicular to a relatively weak static magnetic field. The laser pulse is taken to be linearly polarized, with the orientation of its electric field that corresponds to an ordinary electromagnetic wave. Besides the standard ponderomotive nonlinearity, the appropriate wave equation also contains the nonlinearity that arises from the relativistic electron jitter velocities. During its propagation, the laser beam gets filamented on account of relativistic and pondermotive nonlinearities present in the plasma. The generated plasma wave gets coupled into the filamentary structures of the pump beam. Due to the expected presence of the beam filamentation, the work has been carried out by considering modified paraxial approximation (i.e., beyond the standard paraxial approximation of a very broad beam). It is found that the power of the plasma wave is significantly affected by the magnetic field strength in the presence of both relativistic and pondermotive nonlinearities. It is investigated that the second harmonic generation is also considerably modified by altering the strength of magnetic field. To see the effect of static magnetic field on the harmonic generation, a key parameter, i.e., the ratio of the cyclotron frequency {omega}{sub c}=eB{sub 0}/mc over the laser frequency {omega}{sub 0} has been used, where c is the velocity of light, m and e are the mass and charge of the electron and B{sub 0} is the externally applied magnetic field.

Sharma, Prerana [Ujjain Engineering College, Ujjain, Madhya Pradesh 465010 (India); Sharma, R. P. [Centre for Energy Studies, Indian Institute of Technology, New Delhi 110016 (India)

2012-12-15T23:59:59.000Z

209

Life Cycle Greenhouse Gas Emissions of Nuclear Electricity Generation: Systematic Review and Harmonization  

SciTech Connect

A systematic review and harmonization of life cycle assessment (LCA) literature of nuclear electricity generation technologies was performed to determine causes of and, where possible, reduce variability in estimates of life cycle greenhouse gas (GHG) emissions to clarify the state of knowledge and inform decision making. LCA literature indicates that life cycle GHG emissions from nuclear power are a fraction of traditional fossil sources, but the conditions and assumptions under which nuclear power are deployed can have a significant impact on the magnitude of life cycle GHG emissions relative to renewable technologies. Screening 274 references yielded 27 that reported 99 independent estimates of life cycle GHG emissions from light water reactors (LWRs). The published median, interquartile range (IQR), and range for the pool of LWR life cycle GHG emission estimates were 13, 23, and 220 grams of carbon dioxide equivalent per kilowatt-hour (g CO{sub 2}-eq/kWh), respectively. After harmonizing methods to use consistent gross system boundaries and values for several important system parameters, the same statistics were 12, 17, and 110 g CO{sub 2}-eq/kWh, respectively. Harmonization (especially of performance characteristics) clarifies the estimation of central tendency and variability. To explain the remaining variability, several additional, highly influential consequential factors were examined using other methods. These factors included the primary source energy mix, uranium ore grade, and the selected LCA method. For example, a scenario analysis of future global nuclear development examined the effects of a decreasing global uranium market-average ore grade on life cycle GHG emissions. Depending on conditions, median life cycle GHG emissions could be 9 to 110 g CO{sub 2}-eq/kWh by 2050.

Warner, E. S.; Heath, G. A.

2012-04-01T23:59:59.000Z

210

Method and apparatus for reducing the harmonic currents in alternating-current distribution networks  

DOE Patents (OSTI)

An improved apparatus and method reduce the harmonic content of AC line and neutral line currents in polyphase AC source distribution networks. The apparatus and method employ a polyphase Zig-Zag transformer connected between the AC source distribution network and a load. The apparatus and method also employs a mechanism for increasing the source neutral impedance of the AC source distribution network. This mechanism can consist of a choke installed in the neutral line between the AC source and the Zig-Zag transformer.

Beverly, Leon H. (Lockport, IL); Hance, Richard D. (Elburn, IL); Kristalinski, Alexandr L. (Naperville, IL); Visser, Age T. (Geneva, IL)

1996-01-01T23:59:59.000Z

211

Method and apparatus for reducing the harmonic currents in alternating-current distribution networks  

DOE Patents (OSTI)

An improved apparatus and method reduce the harmonic content of AC line and neutral line currents in polyphase AC source distribution networks. The apparatus and method employ a polyphase Zig-Zag transformer connected between the AC source distribution network and a load. The apparatus and method also employs a mechanism for increasing the source neutral impedance of the AC source distribution network. This mechanism can consist of a choke installed in the neutral line between the AC source and the Zig-Zag transformer. 23 figs.

Beverly, L.H.; Hance, R.D.; Kristalinski, A.L.; Visser, A.T.

1996-11-19T23:59:59.000Z

212

Program on Technology Innovation: Evaluation of a Commercially Available Harmonic Filter  

Science Conference Proceedings (OSTI)

Emissions tests were conducted to analyze common and differential noise, harmonics, and current draw characteristics in the electrical systems of a typical household. A test setup was constructed to simulate the circuits of this typical household in order to determine how the STETZERiZER Filters might affect the electric currents and voltages these circuits. Testing was performed in a frequency range of 3 kHz - 150 kHz to measure the effect of these filters on power draw and power quality, as ...

2013-10-04T23:59:59.000Z

213

Condensation of two-dimensional harmonically confined bosons with Bessel-type interactions  

SciTech Connect

We study the ground-state configurations of few interacting bosons confined in two dimensions by anisotropic harmonic potentials. By means of variational calculations, including correlation effects, we show that the arrangement of bosons strongly depends on the strength of the repulsive interaction and the anisotropy of the confinement. We compute the condensate fraction of the system and found that by increasing the anisotropy of the potential a weaker interaction suffices to destroy the condensate and favors the emergence of a crystal-like structure.

Mese, A. I.; Aktas, S.; Okan, S. E. [Department of Physics, Trakya University, 22030 Edirne (Turkey); Capuzzi, P. [Instituto de Fisica de Buenos Aires, Consejo Nacional de Investigaciones Cientificas y Tecnicas (Argentina); Departamento de Fisica, FCEyN, Universidad de Buenos Aires, Buenos Aires (Argentina); Akdeniz, Z. [Piri Reis University, 34940 Tuzla, Istanbul (Turkey)

2011-10-15T23:59:59.000Z

214

Unified Representation of Quantum Mechanics on One-dimensional Harmonic Oscillator  

E-Print Network (OSTI)

A quantum state corresponds to a specific wave function. We adopt a new mathematical method [1] to improve Dirac's ladder operator method. A set of orthonormal wave functions will be used to associate the operator with the square matrix corresponding to it. These allow us to determine the matrix elements by using the operator relations without having to know the specific wave functions. As a result, we can get the direct results of matrix mechanics and wave mechanics on one-dimensional Harmonic oscillator and their descriptions will be also unified.

Yongqin Wang

2013-03-07T23:59:59.000Z

215

Chaos, ergodic convergence, and fractal instability for a thermostated canonical harmonic oscillator  

SciTech Connect

The authors thermostat a qp harmonic oscillator using the two additional control variables {zeta} and {xi} to simulate Gibbs' canonical distribution. In contrast to the motion of purely Hamiltonian systems, the thermostated oscillator motion is completely ergodic, covering the full four-dimensional {l_brace}q,p,{zeta},{xi}{r_brace} phase space. The local Lyapunov spectrum (instantaneous growth rates of a comoving corotating phase-space hypersphere) exhibits singularities like those found earlier for Hamiltonian chaos, reinforcing the notion that chaos requires kinetic -- as opposed to statistical -- study, both at and away from equilibrium. The exponent singularities appear to have a fractal character.

Hoover, Wm. G.; Hoover, Carol G.; Isbister, Dennis J.

2001-02-01T23:59:59.000Z

216

Common Information Model (CIM)-MultiSpeak Harmonization 2nd Edition  

Science Conference Proceedings (OSTI)

The CIMMultiSpeak harmonization effort sought to identify the degree of correlation that exists between the International Electrotechnical Commission (IEC) Common Information Model (CIM), which is based on IEC standards 61968, 61970, and 62325, and the MultiSpeak v4.1.5 standard for electric system interoperability. The initial effort focused on mapping attributes from the IEC 61968-9 profiles to equivalent profiles that were created for MultiSpeak v4.1.5. A proof-of-concept interoperability ...

2012-11-30T23:59:59.000Z

217

Power frequency communication on long feeders and high levels of harmonic distortion  

SciTech Connect

TWACS is a unique Power Frequency Communication (PFC) technology. The power voltage is modulated at the substation bus for outbound communication and inbound communication from a remote transponder is accomplished by drawing precisely controlled current pulses which are detectable at the distribution substation. The propagation characteristics of the TWACS signal and the frequency characteristics of the signal detector make it possible to communicate over very long distribution feeders and provide a high degree of immunity against harmonic distortions of the power system voltage and current.

Mak, S.T.; Maginnis, R.L. [Distribution Control Systems, Inc., Hazelwood, MO (United States)

1995-10-01T23:59:59.000Z

218

Interbasis expansions for the isotropic 3D harmonic oscillator and bivariate Krawtchouk polynomials  

E-Print Network (OSTI)

An explicit expression for the general bivariate Krawtchouk polynomials is obtained in terms of the standard Krawtchouk and dual Hahn polynomials. The bivariate Krawtchouk polynomials occur as matrix elements of the unitary reducible representations of SO(3) on the energy eigenspaces of the 3-dimensional isotropic harmonic oscillator and the explicit formula is obtained from the decomposition of these representations into their irreducible components. The decomposition entails expanding the Cartesian basis states in the spherical bases that span irreducible SO(3) representations. The overlap coefficients are obtained from the Clebsch-Gordan problem for the su(1,1) Lie algebra.

Vincent X. Genest; Luc Vinet; Alexei Zhedanov

2013-07-02T23:59:59.000Z

219

Calculation of HVDC-converter harmonics in frequency domain with regard to asymmetries and comparison with time domain simulations  

SciTech Connect

In order to study the effects of large HVDC converters to the feeding ac networks, it is of importance to explain and to calculate harmonic phenomena which are a result of converter operation. During commissioning of real HVDC converters it could be seen, that harmonics resulting from unsymmetries in the system voltages or from unsymmetries in converter operation led to significant difficulties concerning the system design. For this reason, not only the effects of characteristic but also the effects of noncharacteristic converter harmonics must be taken into account. The aim is to describe the steady state harmonic behavior of the converter. The harmonic spectra are not determined by time domain analysis but instead the solution is found by frequency domain calculations. This can result in reduced calculation time in comparison to conventional fourier analysis of the time functions. The converter is interpreted as an amplitude modulator with voltage and current converter functions which describe the coupling of the dc circuit and the ac network through the converter. To verify the theory, comparison of frequency domain with time domain calculations were carried out.

Rittiger, J. [Siemens AG, Erlangen (Germany); Kulicke, B. [Technische Univ. Berlin (Germany)

1995-10-01T23:59:59.000Z

220

The phase diagram of ice Ih, II, and III: a quasi-harmonic study  

E-Print Network (OSTI)

The phase diagram of ice Ih, II, and III is studied by a quasi-harmonic approximation. The results of this approach are compared to phase diagrams previously derived by thermodynamic integration using path integral and classical simulations, as well as to experimental data. The studied models are based on both flexible (q-TIP4P/F) and rigid (TIP4P/2005, TIP4PQ/2005) descriptions of the water molecule. Many aspects of the simulated phase diagrams are reasonably reproduced by the quasi-harmonic approximation. Advantages of this simple approach are that it is free from the statistical errors inherent to computer simulations, both classical and quantum limits are easily accessible, and the error of the approximation is expected to decrease in the zero temperature limit. We find that the calculated phase diagram of ice Ih, II, and III depends strongly on the hydrogen disorder of ice III, at least for cell sizes typically used in phase coexistence simulations. Either ice II (in the classical limit) or ice III (in t...

Ramirez, R; Herrero, C P; 10.1063/1.4757064

2012-01-01T23:59:59.000Z

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221

A Proof-of-Principle Echo-enabled Harmonic Generation Free Electron Laser Experiment at SLAC  

Science Conference Proceedings (OSTI)

With the advent of X-ray Free Electron Lasers (FELs), new methods have been developed to extend capabilities at short wavelengths beyond Self-Amplified Spontaneous Emission (SASE). In particular, seeding of a FEL allows for temporal control of the radiation pulse and increases the peak brightness by orders of magnitude. Most recently, Gennady Stupakov and colleagues at SLAC proposed a new technique: Echo-Enabled Harmonic Generation (EEHG). Here a laser microbunches the beam in an undulator and the beam is sheared in a chicane. This process is repeated with a second laser, undulator and chicane. The interplay between these allows a seeding of the X-ray laser up to the 100th harmonic of the first laser. After introducing the physics of FELs and the EEHG seeding technique, we describe contributions to the experimental effort. We will present detailed studies of the experiment including the choice of parameters and their optimization, the emittance effect, spontaneous emission in the undulators, the second laser phase effect, and measurements of the jitter between RF stations. Finally, the status and preliminary results of the Echo-7 experiment will be outlined.

Pernet, Pierre-Louis; /Ecole Polytechnique, Lausanne /SLAC

2012-01-06T23:59:59.000Z

222

Inter- and Intra-Observer Variability in Prostate Definition With Tissue Harmonic and Brightness Mode Imaging  

Science Conference Proceedings (OSTI)

Purpose: The objective of this study was to compare the relative utility of tissue harmonic (H) and brightness (B) transrectal ultrasound (TRUS) images of the prostate by studying interobserver and intraobserver variation in prostate delineation. Methods and Materials: Ten patients with early-stage disease were randomly selected. TRUS images of prostates were acquired using B and H modes. The prostates on all images were contoured by an experienced radiation oncologist (RO) and five equally trained observers. The observers were blinded to information regarding patient and imaging mode. The volumes of prostate glands and areas of midgland slices were calculated. Volumes contoured were compared among the observers and between observer group and RO. Contours on one patient were repeated five times by four observers to evaluate the intraobserver variability. Results: A one-sample Student t-test showed the volumes outlined by five observers are in agreement (p > 0.05) with the RO. Paired Student t-test showed prostate volumes (p = 0.008) and midgland areas (p = 0.006) with H mode were significantly smaller than that with B mode. Two-factor analysis of variances showed significant interobserver variability (p =}35 cc), B mode provided more consistent estimates. Conclusions: H mode provided superior inter- and intraobserver agreement in prostate volume definition for small to medium prostates. In large glands, H mode does not exhibit any additional advantage. Although harmonic imaging has not proven advantageous for all cases, its utilization seems to be judicious for small prostates.

Sandhu, Gurpreet Kaur, E-mail: Gurpreet.Sandhu2@albertahealthservices.ca [Department of Medical Physics, Tom Baker Cancer Centre, Calgary, Alberta (Canada); Department of Physics and Astronomy, University of Calgary, Calgary, Alberta (Canada); Dunscombe, Peter [Department of Medical Physics, Tom Baker Cancer Centre, Calgary, Alberta (Canada); Department of Physics and Astronomy, University of Calgary, Calgary, Alberta (Canada); Department of Oncology, Faculty of Medicine, University of Calgary, Calgary, Alberta (Canada); Meyer, Tyler [Department of Medical Physics, Tom Baker Cancer Centre, Calgary, Alberta (Canada); Department of Physics and Astronomy, University of Calgary, Calgary, Alberta (Canada); Pavamani, Simon [Department of Oncology, Faculty of Medicine, University of Calgary, Calgary, Alberta (Canada); Department of Radiation Oncology, Christian Medical College, Vellore (India); Khan, Rao [Department of Medical Physics, Tom Baker Cancer Centre, Calgary, Alberta (Canada); Department of Physics and Astronomy, University of Calgary, Calgary, Alberta (Canada); Department of Oncology, Faculty of Medicine, University of Calgary, Calgary, Alberta (Canada)

2012-01-01T23:59:59.000Z

223

$?(\\hat{x},\\hat{p})-$deformation of the harmonic oscillator in a $2D-$phase space  

E-Print Network (OSTI)

This work addresses a ${\\theta}(\\hat{x},\\hat{p})-$deformation of the harmonic oscillator in a $2D-$phase space. Specifically, it concerns a quantum mechanics of the harmonic oscillator based on a noncanonical commutation relation depending on the phase space coordinates. A reformulation of this deformation is considered in terms of a $q-$deformation allowing to easily deduce the energy spectrum of the induced deformed harmonic oscillator. Then, it is proved that the deformed position and momentum operators admit a one-parameter family of self-adjoint extensions. These operators engender new families of deformed Hermite polynomials generalizing usual $q-$ Hermite polynomials. Relevant matrix elements are computed. Finally, a $su(2)-$algebra representation of the considered deformation is investigated and discussed.

M. N. Hounkonnou; D. Ousmane Samary; E. Baloitcha; S. Arjika

2012-11-01T23:59:59.000Z

224

Life Cycle Greenhouse Gas Emissions of Trough and Tower Concentrating Solar Power Electricity Generation: Systematic Review and Harmonization  

SciTech Connect

In reviewing life cycle assessment (LCA) literature of utility-scale concentrating solar power (CSP) systems, this analysis focuses on reducing variability and clarifying the central tendency of published estimates of life cycle greenhouse gas (GHG) emissions through a meta-analytical process called harmonization. From 125 references reviewed, 10 produced 36 independent GHG emissions estimates passing screens for quality and relevance: 19 for parabolic trough (trough) technology and 17 for power tower (tower) technology. The interquartile range (IQR) of published estimates for troughs and towers were 83 and 20 grams of carbon dioxide equivalent per kilowatt-hour (g CO2-eq/kWh),1 respectively; median estimates were 26 and 38 g CO2-eq/kWh for trough and tower, respectively. Two levels of harmonization were applied. Light harmonization reduced variability in published estimates by using consistent values for key parameters pertaining to plant design and performance. The IQR and median were reduced by 87% and 17%, respectively, for troughs. For towers, the IQR and median decreased by 33% and 38%, respectively. Next, five trough LCAs reporting detailed life cycle inventories were identified. The variability and central tendency of their estimates are reduced by 91% and 81%, respectively, after light harmonization. By harmonizing these five estimates to consistent values for global warming intensities of materials and expanding system boundaries to consistently include electricity and auxiliary natural gas combustion, variability is reduced by an additional 32% while central tendency increases by 8%. These harmonized values provide useful starting points for policy makers in evaluating life cycle GHG emissions from CSP projects without the requirement to conduct a full LCA for each new project.

Burkhardt, J. J.; Heath, G.; Cohen, E.

2012-04-01T23:59:59.000Z

225

Universal and deterministic manipulation of the quantum state of harmonic oscillators: a route to unitary gates for Fock State qubits  

E-Print Network (OSTI)

We present a simple quantum circuit that allows for the universal and deterministic manipulation of the quantum state of confined harmonic oscillators. The scheme is based on the selective interactions of the referred oscillator with an auxiliary three-level system and a classical external driving source, and enables any unitary operations on Fock states, two-by-two. One circuit is equivalent to a single qubit unitary logical gate on Fock states qubits. Sequences of similar protocols allow for complete, deterministic and state-independent manipulation of the harmonic oscillator quantum state.

Marcelo Franca Santos

2004-11-10T23:59:59.000Z

226

Mitigation of Voltage and Current Harmonics in Grid-Connected Microgrids Savaghebi, Mehdi; Guerro, Josep M.; Jalilian, Alireza ; Quintero, Juan Carlos Vasquez  

E-Print Network (OSTI)

Mitigation of Voltage and Current Harmonics in Grid-Connected Microgrids Savaghebi, Mehdi; Guerro-Connected Microgrids. In Proceedings of the 21st IEEE International Symposium on Industrial Electronics (ISIE), 2012;Mitigation of Voltage and Current Harmonics in Grid-Connected Microgrids Mehdi Savaghebi1 , Josep M. Guerrero

Vasquez, Juan Carlos

227

The Simple Harmonic Rotor with Motion Hinged By of a Helicopter  

E-Print Network (OSTI)

Summary.--In simple harmonic oscillation of the helicopter with hinged blades, the tip-path plane is tilted with respect to the shaft in the plane of oscillation and in the plane perpendicular to it. The angles of tilt can be expressed as functions of angular velocity and acceleration. The influence ' of the acceleration term on the dynamic stability of the helicopter is small. The expressions for angles of tilt due to angular velocity can be simplified to the expressions obtained in previous work under assumptions of quasi-static conditions. 1. I~troductio~.--It has been shown in Ref. 1 that when the rotor shaft of a helicopter tilts with constant pitching velocity, the tip-path plane lags behind the shaft and also tilts Sideways. These angles of lag and sidetilt were found to be proportional to the pitching velocity of the shaft and the following expressions were derived: Oal _. Of yD............. (1)

J. K. Zbrozek; Dipl. Eng; J. K. Zbxoze

1949-01-01T23:59:59.000Z

228

Analytical transformed harmonic oscillator basis for continuum discretized coupled channels calculations  

Science Conference Proceedings (OSTI)

A new method for continuum discretization in continuum-discretized coupled-channels calculations is proposed. The method is based on an analytic local-scale transformation of the harmonic-oscillator wave functions proposed for other purposes in a recent work [Karatagladis et al., Phys. Rev. C 71, 064601 (2005)]. The new approach is compared with the standard method of continuum discretization in terms of energy bins for the reactions d+{sup 58}Ni at 80 MeV, {sup 6}Li+{sup 40}Ca at 156 MeV, and {sup 6}He+{sup 208}Pb at 22 MeV and 240 MeV/nucleon. In all cases very good agreement between both approaches is found.

Moro, A. M.; Arias, J. M. [Departamento de Fisica Atomica, Molecular y Nuclear, Facultad de Fisica, Universidad de Sevilla, Apartado 1065, E-41080 Sevilla (Spain); Gomez-Camacho, J. [Departamento de Fisica Atomica, Molecular y Nuclear, Facultad de Fisica, Universidad de Sevilla, Apartado 1065, E-41080 Sevilla (Spain); Centro Nacional de Aceleradores, Avda Thomas A. Edison, E-41092 Sevilla (Spain); Perez-Bernal, F. [Departamento de Fisica Aplicada, Universidad de Huelva, E-21071 Huelva (Spain)

2009-11-15T23:59:59.000Z

229

Electro-optic harmonic conversion to switch a laser beam out of a cavity  

DOE Patents (OSTI)

The present invention relates to switching laser beams out of laser cavities, and more particularly, it relates to the use of generating harmonics of the laser beam to accomplish the switching. When laser light is generatd in a laser cavity the problem arises of how to switch the laser light out of the cavity in order to make use of the resulting laser beam in a well known multitude of ways. These uses include range finding, communication, remote sensing, medical surgery, laser fusion applications and many more. The switch-out problem becomes more difficult as the size of the laser aperture grows such as in laser fusion applications. The final amplifier stages of the Nova and Novette lasers at Lawrence Livermore National Laboratory are 46 centimeters with the laser beam expanded to 74 centimeters thereafter. Larger aperture lasers are planned.

Haas, R.A.; Henesian, M.A.

1984-10-19T23:59:59.000Z

230

Coupling interaction between the power coupler and the third harmonic superconducting cavity  

SciTech Connect

Fermilab has developed a third harmonic superconducting cavity operating at the frequency of 3.9 GHz to improve the beam performance for the FLASH user facility at DESY. It is interesting to investigate the coupling interaction between the SRF cavity and the power coupler with or without beam loading. The coupling of the power coupler to the cavity needs to be determined to minimize the power consumption and guarantee the best performance for a given beam current. In this paper, we build and analyze an equivalent circuit model containing a series of lumped elements to represent the resonant system. An analytic solution of the required power from the generator as a function of the system parameters has also been given based on a vector diagram.

Li, Jianjian; Solyak, Nikolay; /Fermilab; Wong, Thomas; /IIT, Chicago

2007-06-01T23:59:59.000Z

231

Regional Modelling of the Southern African Geomagnetic Field using Harmonic Splines  

E-Print Network (OSTI)

Over the southern African region the geomagnetic field is weak and changes rapidly. For this area series of geomagnetic field measurements exist since the 1950s. We take advantage of the existing repeat station surveys and observatory annual means, and clean these data sets by eliminating jumps and minimising external field contributions in the original time series. This unique data set allows us to obtain a detailed view of the geomagnetic field behaviour in space and time by computing a regional model. For this, we use a system of representation similar to harmonic splines. Initially, the technique is systematically tested on synthetic data. After systematically testing the method on synthetic data, we derive a model for 1961 to 2001 that gives a detailed view of the fast changes of the geomagnetic field in this region.

Geese, Anne; Lesur, Vincent; Mandea, Mioara

2010-01-01T23:59:59.000Z

232

Three attractively interacting fermions in a harmonic trap: Exact solution, ferromagnetism, and high-temperature thermodynamics  

SciTech Connect

Three fermions with strongly repulsive interactions in a spherical harmonic trap constitute the simplest nontrivial system that can exhibit the onset of itinerant ferromagnetism. Here, we present exact solutions for three trapped, attractively interacting fermions near a Feshbach resonance. We analyze energy levels on the upper branch of the resonance where the atomic interaction is effectively repulsive. When the s-wave scattering length a is sufficiently positive, three fully polarized fermions are energetically stable against a single spin-flip, indicating the possibility of itinerant ferromagnetism, as inferred in the recent experiment. We also investigate the high-temperature thermodynamics of a strongly repulsive or attractive Fermi gas using a quantum virial expansion. The second and third virial coefficients are calculated. The resulting equations of state can be tested in future quantitative experimental measurements at high temperatures and can provide a useful benchmark for quantum Monte Carlo simulations.

Liu Xiaji; Hu Hui; Drummond, Peter D. [ARC Centre of Excellence for Quantum-Atom Optics, Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Melbourne 3122 (Australia)

2010-08-15T23:59:59.000Z

233

Investigation of Ion Absorption of the High Harmonic Fast Wave in NSTX using HPRT  

DOE Green Energy (OSTI)

Understanding high harmonic fast wave (HHFW) power absorption by ions in a spherical torus (ST) is of critical importance to assessing the wave's viability as a means of heating and especially driving current. In this work, the HPRT code is used to calculate absorption for helium and deuterium, with and without minority hydrogen in National Spherical Torus Experiment (NSTX) plasmas using experimental EFIT code equilibria and kinetic profiles. HPRT is a two-dimensional ray-tracing code which uses the full hot plasma dielectric to compute the perpendicular wave number along the hot electron and cold ion plasma ray path. Ion and electron absorption dependence on antenna phasing, ion temperature, beta (subscript t), and minority temperature and concentration is analyzed. These results form the basis for comparisons with other codes, such as CURRAY, METS, TORIC, and AORSA.

Rosenberg, A.; Menard, J.E.; and LeBlanc, B.P.

2001-05-18T23:59:59.000Z

234

Numerical Verification of Bounce Harmonic Resonances in Neoclassical Toroidal Viscosity for Tokamaks  

SciTech Connect

This Letter presents the rst numerical veri cation for the bounce-harmonic (BH) resonance phenomena of the neoclassical transport in a tokamak perturbed by non-axisymmetric magnetic elds. The BH resonances were predicted by analytic theories of neoclassical toroidal viscosity (NTV), as the parallel and perpendicular drift motions can be resonant and result in a great enhancement of the radial momentum transport. A new drift-kinetic #14;f guiding-center particle code, POCA, clearly veri ed that the perpendicular drift motions can reduce the transport by phase-mixing, but in the BH resonances the motions can form closed orbits and particles radially drift out fast. The POCA calculations on resulting NTV torque are largely consistent with analytic calculations, and show that the BH resonances can easily dominate the NTV torque when a plasma rotates in the perturbed tokamak and therefore is a critical physics for predicting the rotation and stability in ITER. __________________________________________________

Kimin Kim, Jong-Kyu Park and Allen H. Boozer

2013-04-17T23:59:59.000Z

235

PT-Rotations, PT-Spherical Harmonics and the PT-Hydrogen Atom  

E-Print Network (OSTI)

We have constructed a set of non-Hermitian operators that satisfy the commutation relations of the SO(3)-Lie algebra. It is shown that this operators generate rotations in the configuration space and not in the momentum space but in a modified non-Hermitian momentum space. This generators are related with a new type of spherical harmonics that result to be PT-orthonormal. Additionally, we have shown that this operators represent conserved quantities for a non-Hermitian Hamiltonian with an additional complex term. As a particular case, the solutions of the corresponding PT-Hydrogen atom that includes a complex term are obtained, and it is found that a non-Hermitian Runge-Lenz vector is a conserved quantity. In this way, we obtain a set of non-Hermitian operators that satisfy the SO(4)-Lie algebra.

Juan M. Romero; R. Bernal-Jaquez; O. Gonzalez-Gaxiola

2010-01-11T23:59:59.000Z

236

Dynamics and decoherence of two cold bosons in a one-dimensional harmonic trap  

Science Conference Proceedings (OSTI)

We study dynamics of two interacting ultracold Bose atoms in a harmonic oscillator potential in one spatial dimension. Making use of the exact solution of the eigenvalue problem of a particle in the {delta}-like potential, we study the time evolution of an initially separable state of two particles. The corresponding time-dependent single-particle density matrix is obtained and diagonalized, and single-particle orbitals are found. This allows us to study decoherence as well as creation of entanglement during the dynamics. The evolution of the orbital corresponding to the largest eigenvalue is then compared to the evolution according to the Gross-Pitaevskii equation. We show that if initially the center of mass and relative degrees of freedom are entangled, then the Gross-Pitaevskii equation fails to reproduce the exact dynamics and entanglement is produced dynamically. We stress that predictions of our study can be verified experimentally in an optical lattice in the low-tunneling limit.

Sowinski, Tomasz [Instytut Fizyki PAN, Al. Lotnikow 32/46, PL-02-668 Warszawa (Poland); Wydzial Biologii i Nauk o Srodowisku UKSW, ul. Woycickiego 1/3, PL-01-938 Warszawa (Poland); Brewczyk, Miroslaw [Wydzial Fizyki, Uniwersytet w Bialymstoku, ul. Lipowa 41, PL-15-424 Bialystok (Poland); Gajda, Mariusz [Instytut Fizyki PAN, Al. Lotnikow 32/46, PL-02-668 Warszawa (Poland); Wydzial Matematyczno-Przyrodniczy SNS UKSW, Al. Lotnikow 32/46, PL-02-668 Warszawa (Poland); RzaPzewski, Kazimierz [Wydzial Matematyczno-Przyrodniczy SNS UKSW, Al. Lotnikow 32/46, PL-02-668 Warszawa (Poland); Centrum Fizyki Teoretycznej PAN, Al. Lotnikow 32/46, PL-02-668 Warszawa (Poland)

2010-11-15T23:59:59.000Z

237

Life Cycle Greenhouse Gas Emissions of Utility-Scale Wind Power: Systematic Review and Harmonization  

Science Conference Proceedings (OSTI)

A systematic review and harmonization of life cycle assessment (LCA) literature of utility-scale wind power systems was performed to determine the causes of and, where possible, reduce variability in estimates of life cycle greenhouse gas (GHG) emissions. Screening of approximately 240 LCAs of onshore and offshore systems yielded 72 references meeting minimum thresholds for quality, transparency, and relevance. Of those, 49 references provided 126 estimates of life cycle GHG emissions. Published estimates ranged from 1.7 to 81 grams CO{sub 2}-equivalent per kilowatt-hour (g CO{sub 2}-eq/kWh), with median and interquartile range (IQR) both at 12 g CO{sub 2}-eq/kWh. After adjusting the published estimates to use consistent gross system boundaries and values for several important system parameters, the total range was reduced by 47% to 3.0 to 45 g CO{sub 2}-eq/kWh and the IQR was reduced by 14% to 10 g CO{sub 2}-eq/kWh, while the median remained relatively constant (11 g CO{sub 2}-eq/kWh). Harmonization of capacity factor resulted in the largest reduction in variability in life cycle GHG emission estimates. This study concludes that the large number of previously published life cycle GHG emission estimates of wind power systems and their tight distribution suggest that new process-based LCAs of similar wind turbine technologies are unlikely to differ greatly. However, additional consequential LCAs would enhance the understanding of true life cycle GHG emissions of wind power (e.g., changes to other generators operations when wind electricity is added to the grid), although even those are unlikely to fundamentally change the comparison of wind to other electricity generation sources.

Dolan, S. L.; Heath, G. A.

2012-04-01T23:59:59.000Z

238

Abstract--This paper presents the harmonic analysis of offshore wind farm (OWF) models with full converters  

E-Print Network (OSTI)

. Hjerrild, are with DONG Energy, Denmark (e-mail:, lukko@dongenergy.dk, jeshj@dongenergy.dk). C. L. Bak is with the Institute of Energy Technology, Aalborg University, Denmark (e-mail: clb@iet.aau.dk). effects of harmonics [15]. Fig. 2 Wind turbines from Burbo Bank Offshore Wind Farm (daylife.com). In order to investigate

Bak, Claus Leth

239

Third harmonic flow of charged particles in Au + Au collisions at ?s[subscript NN]=200GeV  

E-Print Network (OSTI)

We report measurements of the third harmonic coefficient of the azimuthal anisotropy, v[subscript 3], known as triangular flow. The analysis is for charged particles in Au+Au collisions at ?s[subscript NN]=200 GeV, based ...

Betancourt, M. J.

240

CFL Labeling Harmonization in the United States, China, Brazil andELI Member Countries: Specifications, Testing, and MutualRecognition  

Science Conference Proceedings (OSTI)

This report examines critical differences among energy-efficient labeling programs for CFLs in Brazil, China, the United States, and the seven members of the international Efficient Lighting Initiative (ELI) in terms of technical specifications and test procedures, and review issues related to international harmonization of these standards.

Fridley, David; Lin, Jiang; Denver, Andrea; Biermayer, Peter; Dillavou, Tyler

2005-07-20T23:59:59.000Z

Note: This page contains sample records for the topic "hartley harmon oldham" from the National Library of EnergyBeta (NLEBeta).
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241

Measurements and modeling of laser irradiance in the high-power third-harmonic Nova focus: Volume B, Data book  

Science Conference Proceedings (OSTI)

This document contains analysis of third-harmonic equivalent plane photographs obtained in the 2PJW{underscore}3wspot series and described in the report under the same title, Volume A. The photographs that are analyzed in this data book are summarized. A description of the analysis output is included.

Wegner, P.

1992-05-01T23:59:59.000Z

242

Sub-Millimetre Wave Sub-Harmonically Pumped Image-Rejection Schottky Mixers for STEAM-R  

E-Print Network (OSTI)

Sub-Millimetre Wave Sub-Harmonically Pumped Image- Rejection Schottky Mixers for STEAM-R S. P. Rea = 343.5 - 355.5 GHz switch The PREMIER Mission The STEAM-R Instrument PREMIER (PRocess Exploration-sounder (MWLS) on the same satellite platform. The MWLS is the latest iteration of the STEAM-R instrument

243

On the harmonics of the low-frequency quasi-periodic oscillation in GRS 1915+105  

E-Print Network (OSTI)

GRS 1915+105 is a widely studied black hole binary, well known because of its extremely fast and complex variability. Flaring periods of high variability alternate with "stable" phases (the plateaux) when the flux is low, the spectra are hard and the timing properties of the source are similar to those of a number of black hole candidates in hard spectral state. In the plateaux the power density spectra are dominated by a low frequency quasi periodic oscillation (LFQPO) superposed onto a band limited noise continuum and accompanied by at least one harmonic. In this paper we focus on three plateaux, presenting the analysis of the power density spectra and in particular of the LFQPO and its harmonics. While plotting the LFQPO and all the harmonics together on a frequency-width plane, we found the presence of a positive trend of broadening when the frequency increases. This trend can shed light in the nature of the harmonic content of the LFQPO and challenges the usual interpretation of these timing features.

Ratti, E M; Motta, S E

2012-01-01T23:59:59.000Z

244

Direct probing of electronic density distribution of a Rydberg state by high-order harmonic generation in a few-cycle laser pulse  

Science Conference Proceedings (OSTI)

We demonstrate that the electronic density distribution of a Rydberg state can be probed directly using a broadband harmonic spectrum in a few-cycle laser pulse. Taking advantage of the large orbital radius of a Rydberg state, we show that the Rydberg electron can be accelerated directly toward the core under the influence of a few-cycle laser pulse, leading to recombination and emission of harmonic photons. In this case the initial position of the electron and the harmonic order form a one-to-one correspondence, resulting in a realization of direct probing of the density distribution of the initial Rydberg state.

Zhai Zhen; Fu Panming; Wang Bingbing [Laboratory of Optical Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China); Chen Jing [Center for Nonlinear Studies, Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China); Yan Zongchao [Department of Physics, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick E3B 5A3 (Canada)

2010-10-15T23:59:59.000Z

245

Exploration of High Harmonic Fast Wave Heating on the National Spherical Torus Experiment  

SciTech Connect

High Harmonic Fast Wave (HHFW) heating has been proposed as a particularly attractive means for plasma heating and current drive in the high-beta plasmas that are achievable in spherical torus (ST) devices. The National Spherical Torus Experiment (NSTX) [Ono, M., Kaye, S.M., Neumeyer, S., et al., Proceedings, 18th IEEE/NPSS Symposium on Fusion Engineering, Albuquerque, 1999, (IEEE, Piscataway, NJ (1999), p. 53.)] is such a device. An radio-frequency (rf) heating system has been installed on NSTX to explore the physics of HHFW heating, current drive via rf waves and for use as a tool to demonstrate the attractiveness of the ST concept as a fusion device. To date, experiments have demonstrated many of the theoretical predictions for HHFW. In particular, strong wave absorption on electrons over a wide range of plasma parameters and wave parallel phase velocities, wave acceleration of energetic ions, and indications of current drive for directed wave spectra have been observed. In addition HHFW heating has been used to explore the energy transport properties of NSTX plasmas, to create H-mode (high-confinement mode) discharges with a large fraction of bootstrap current and to control the plasma current profile during the early stages of the discharge.

J.R. Wilson; R.E. Bell; S. Bernabei; M. Bitter; P. Bonoli; D. Gates; J. Hosea; B. LeBlanc; T.K. Mau; S. Medley; J. Menard; D. Mueller; M. Ono; C.K. Phillips; R.I. Pinsker; R. Raman; A. Rosenberg; P. Ryan; S. Sabbagh; D. Stutman; D. Swain; Y. Takase; J. Wilgen; the NSTX Team

2003-02-11T23:59:59.000Z

246

A quantum exactly solvable non-linear oscillator with quasi-harmonic behaviour  

SciTech Connect

The quantum version of a non-linear oscillator, previously analyzed at the classical level, is studied. This is a problem of quantization of a system with position-dependent mass of the form m = (1 + {lambda}x {sup 2}){sup -1} and with a {lambda}-dependent non-polynomial rational potential. This {lambda}-dependent system can be considered as a deformation of the harmonic oscillator in the sense that for {lambda} {sup {yields}} 0 all the characteristics of the linear oscillator are recovered. First, the {lambda}-dependent Schroedinger equation is exactly solved as a Sturm-Liouville problem, and the {lambda}-dependent eigenenergies and eigenfunctions are obtained for both {lambda} > 0 and {lambda} < 0. The {lambda}-dependent wave functions appear as related with a family of orthogonal polynomials that can be considered as {lambda}-deformations of the standard Hermite polynomials. In the second part, the {lambda}-dependent Schroedinger equation is solved by using the Schroedinger factorization method, the theory of intertwined Hamiltonians, and the property of shape invariance as an approach. Finally, the new family of orthogonal polynomials is studied. We prove the existence of a {lambda}-dependent Rodrigues formula, a generating function and {lambda}-dependent recursion relations between polynomials of different orders.

Carinena, Jose F. [Departamento de Fisica Teorica, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza (Spain)]. E-mail: jfc@unizar.es; Ranada, Manuel F. [Departamento de Fisica Teorica, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza (Spain)]. E-mail: mfran@unizar.es; Santander, Mariano [Departamento de Fisica Teorica, Facultad de Ciencias, Universidad de Valladolid, 47011 Valladolid (Spain)]. E-mail: msn@fta.uva.es

2007-02-15T23:59:59.000Z

247

The quantum harmonic oscillator on the sphere and the hyperbolic plane  

SciTech Connect

A nonlinear model of the quantum harmonic oscillator on two-dimensional space of constant curvature is exactly solved. This model depends on a parameter {lambda} that is related with the curvature of the space. First, the relation with other approaches is discussed and then the classical system is quantized by analyzing the symmetries of the metric (Killing vectors), obtaining a {lambda}-dependent invariant measure d{mu}{sub {lambda}} and expressing the Hamiltonian as a function of the Noether momenta. In the second part, the quantum superintegrability of the Hamiltonian and the multiple separability of the Schroedinger equation is studied. Two {lambda}-dependent Sturm-Liouville problems, related with two different {lambda}-deformations of the Hermite equation, are obtained. This leads to the study of two {lambda}-dependent families of orthogonal polynomials both related with the Hermite polynomials. Finally the wave functions {psi}{sub m,n} and the energies E{sub m,n} of the bound states are exactly obtained in both the sphere S{sup 2} and the hyperbolic plane H{sup 2}.

Carinena, Jose F. [Departamento de Fisica Teorica, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza (Spain)], E-mail: jfc@unizar.es; Ranada, Manuel F. [Departamento de Fisica Teorica, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza (Spain)], E-mail: mfran@unizar.es; Santander, Mariano [Departamento de Fisica Teorica, Facultad de Ciencias, Universidad de Valladolid, 47011 Valladolid (Spain)], E-mail: msn@fta.uva.es

2007-10-15T23:59:59.000Z

248

The phase diagram of ice: a quasi-harmonic study based on a flexible water model  

E-Print Network (OSTI)

The phase diagram of ice is studied by a quasi-harmonic approximation. The free energy of all experimentally known ice phases has been calculated with the flexible q-TIP4P/F model of water. The only exception is the high pressure ice X, in which the presence of symmetric O-H-O bonds prevents its modeling with this empirical interatomic potential. The simplicity of our approach allows us to study ice phases at state points of the T-P plane that have been omitted in previous simulations using free energy methods based on thermodynamic integration. The effect in the phase diagram of averaging the proton disorder that appears in several ice phases has been studied. It is found particularly relevant for ice III, at least for cell sizes typically used in phase coexistence simulations. New insight into the capability of the employed water model to describe the coexistence of ice phases is presented. We find that the H-ordered ices IX and XIV, as well as the H-disordered ice XII, are particularly stable for this wate...

Ramirez, R; Herrero, C P

2013-01-01T23:59:59.000Z

249

Fluctuations in the Gravitational, Strong and Weak Nuclear Fields through an Effective Harmonic Oscillator Model  

E-Print Network (OSTI)

We propose an effective harmonic oscillator model in order to treat the fluctuations of the gravitational, strong and weak nuclear fields. With respect to the gravitational field, first we use the model to estimate its fluctuating strength, necessary to decohere the wavefunction of a cubic centimeter of air at the standard temperature and pressure conditions. Second, the fluctuation of a point mass through a distance equal to the Planck length leads to the self-gravitational interaction of a particle, which can be related to its de Broglie frequency. Third, by making the equality of the fluctuating field strength with the gravitational field of a mass M at half of its Schwarzschild radius, we obtain an estimate of the mass of the Universe. We also consider the fluctuations of the strong nuclear field, as a means to estimate the separation in energy between the ground state and the centroid of the excitated states of the nucleon. Finally, taking into account the neutron-proton mass difference, we use the fluctuations of the weak nuclear field in order to evaluate the weak coupling constant.

P. R. Silva

2001-12-10T23:59:59.000Z

250

Variable order spherical harmonic expansion scheme for the radiative transport equation using finite elements  

SciTech Connect

Highlights: {yields} We developed a variable order global basis scheme to solve light transport in 3D. {yields} Based on finite elements, the method can be applied to a wide class of geometries. {yields} It is computationally cheap when compared to the fixed order scheme. {yields} Comparisons with local basis method and other models demonstrate its accuracy. {yields} Addresses problems encountered n modeling of light transport in human brain. - Abstract: We propose the P{sub N} approximation based on a finite element framework for solving the radiative transport equation with optical tomography as the primary application area. The key idea is to employ a variable order spherical harmonic expansion for angular discretization based on the proximity to the source and the local scattering coefficient. The proposed scheme is shown to be computationally efficient compared to employing homogeneously high orders of expansion everywhere in the domain. In addition the numerical method is shown to accurately describe the void regions encountered in the forward modeling of real-life specimens such as infant brains. The accuracy of the method is demonstrated over three model problems where the P{sub N} approximation is compared against Monte Carlo simulations and other state-of-the-art methods.

Surya Mohan, P., E-mail: sprerapa@cs.ucl.ac.uk [Department of Computer Science, University College London, Gower Street, London WC1E 6BT (United Kingdom); Tarvainen, Tanja, E-mail: tanja.tarvainen@uef.fi [Department of Computer Science, University College London, Gower Street, London WC1E 6BT (United Kingdom); Department of Applied Physics, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio (Finland); Schweiger, Martin, E-mail: martins@medphys.ucl.ac.uk [Department of Computer Science, University College London, Gower Street, London WC1E 6BT (United Kingdom); Pulkkinen, Aki, E-mail: pulkkine@sten.sunnybrook.utoronto.ca [Department of Applied Physics, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio (Finland); Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, 2075 Bayview Ave., Toronto, M4N 3M5 (Canada); Arridge, Simon R., E-mail: S.Arridge@cs.ucl.ac.uk [Department of Computer Science, University College London, Gower Street, London WC1E 6BT (United Kingdom)

2011-08-10T23:59:59.000Z

251

Harmonic analysis of irradiation asymmetry for cylindrical implosions driven by high-frequency rotating ion beams  

E-Print Network (OSTI)

Cylindrical implosions driven by intense heavy ions beams should be instrumental in a near future to study High Energy Density Matter. By rotating the beam by means of a high frequency wobbler, it should be possible to deposit energy in the outer layers of a cylinder, compressing the material deposited in its core. The beam temporal profile should however generate an inevitable irradiation asymmetry likely to feed the Rayleigh-Taylor instability (RTI) during the implosion phase. In this paper, we compute the Fourier components of the target irradiation in order to make the junction with previous works on RTI performed in this setting. Implementing a 1D and 2D beam models, we find these components can be expressed exactly in terms of the Fourier transform of the temporal beam profile. If $T$ is the beam duration and $\\Omega$ its rotation frequency, "magic products" $\\Omega T$ can be identified which cancel the first harmonic of the deposited density, resulting in an improved irradiation symmetry.

Bret, Antoine; Tahir, Naeem

2012-01-01T23:59:59.000Z

252

Energy Efficiency Standards and Labels in North America: Opportunities for Harmonization  

Science Conference Proceedings (OSTI)

To support the North American Energy Working Group's Expert Group on Energy Efficiency (NAEWG-EE), USDOE commissioned the Collaborative Labeling and Appliance Standards Program (CLASP) to prepare a resource document comparing current standards, labels, and test procedure regulations in Canada, Mexico, and the United States. The resulting document reached the following conclusions: Out of 24 energy-using products for which at least one of the three countries has energy efficiency regulations, three products -- refrigerators/freezers, split system central air conditioners, and room air conditioners -- have similar or identical minimum energy performance standards (MEPS) in the three countries. These same three products, as well as three-phase motors, have similar or identical test procedures throughout the region. There are 10 products with different MEPS and test procedures, but which have the short-term potential to develop common test procedures, MEPS, and/or labels. Three other noteworthy areas where possible energy efficiency initiatives have potential for harmonization are standby losses, uniform endorsement labels, and a new standard or label on windows. This paper explains these conclusions and presents the underlying comparative data.

Vanwiemcgrory, Laura; Wiel, Stephen; Van Wie McGrory, Laura; Harrington, Lloyd

2002-05-16T23:59:59.000Z

253

The harmonization of Canadian and U.S. window programs and standards. Final report  

SciTech Connect

The window and door industry in North America have a strong interest in harmonizing US and Canadian rating procedures and standards for predicting the thermal performance of their products. The costs and time associated with complying with the requirements in both countries are significant and could be reduced through reciprocity. The purpose of this paper is to compare the US and Canadian rating programs. Joint efforts between the US and Canada can use this information to focus on reconciling the differences and to work towards reciprocity. The following identifies the applicable procedures and standards for both countries, and summarizes the major differences in the products that are covered, the sizes that are used, the U-factor and solar heat gain coefficient calculational and test methods, air leakage measurement, prediction of annual energy use, condensation resistance methods, reporting requirements, and accreditation and certification programs. The major differences between the system s are identified and recommendations are made to achieve reciprocity. The appendix contains a paper that is a synopsis of the findings from this study.

NONE

1995-05-31T23:59:59.000Z

254

Anthropometry for WorldSID, a World-Harmonized Midsize Male Side Impact Crash Dummy  

DOE Green Energy (OSTI)

The WorldSID project is a global effort to design a new generation side impact crash test dummy under the direction of the International Organization for Standardization (ISO). The first WorldSID crash dummy will represent a world-harmonized mid-size adult male. This paper discusses the research and rationale undertaken to define the anthropometry of a world standard midsize male in the typical automotive seated posture. Various anthropometry databases are compared region by region and in terms of the key dimensions needed for crash dummy design. The Anthropometry for Motor Vehicle Occupants (AMVO) dataset, as established by the University of Michigan Transportation Research Institute (UMTRI), is selected as the basis for the WorldSID mid-size male, updated to include revisions to the pelvis bone location. The proposed mass of the dummy is 77.3kg with full arms. The rationale for the selected mass is discussed. The joint location and surface landmark database is appended to this paper.

S. Moss; Z. Wang; M. Salloum; M. Reed; M. Van Ratingen; D. Cesari; R. Scherer; T. Uchimura; M. Beusenberg

2000-06-19T23:59:59.000Z

255

Analysis of inverter models and harmonic propagation. Part III. Transient processes in inverter models  

SciTech Connect

Part III of a three part study presents the theoretical analysis and the experimental verification of transient processes that arise in the photovoltaic power system during its normal commutational operations. A general description of the transient processes problem and the method of analysis is presented. The transient processes in the inverter model with an inductive filter are analyzed for both the discontinuous and the continuous currents on the dc side of the inverter, and the problem of transient processes due to the change in illumination level is discussed. Transient processes in the inverter model with capacitive filter are analyzed with special emphasis on the process that arises in the photovoltaic power system immediately after the first ignition of the thyristors. The influence of the operating point of the solar cell array on the transient process is discussed. A sequence for optimal operations is recommended. Part I of the study (SAND 7040/1) contains a detailed description of the microcomputer based simulator that represents the output characteristics of the five commercially available types of solar cell arrays under different environmental conditions, and Part II (SAND 7040/2) describes the harmonics in the photovoltaic power system.

Slonim, M.A.; Stanek, E.K.

1984-09-01T23:59:59.000Z

256

Infrared and ultraviolet cutoffs in variational calculations with a harmonic oscillator basis  

E-Print Network (OSTI)

I abstract from a recent publication [1] the motivations for, analysis in and conclusions of a study of the ultraviolet and infrared momentum regulators induced by the necessary truncation of the model spaces formed by a variational trial wave function. This trial function is built systematically from a complete set of many-body basis states based upon three-dimensional harmonic oscillator (HO) functions. Each model space is defined by a truncation of the expansion characterized by a counting number (N) and by the intrinsic scale ($\\hbar\\omega$) of the HO basis. Extending both the uv cutoff to infinity and the ir cutoff to zero is prescribed for a converged calculation. In [1] we established practical procedures which utilize these regulators to obtain the extrapolated result from sequences of calculations with model spaces. Finally, I update this subject by mentioning recent work on our extrapolation prescriptions which have appeared since the submission of [1]. The numerical example chosen for this contribution consists of calculations of the ground state energy of the triton with the "bare" and "soft" Idaho N3LO nucleon-nucleon (NN) interaction.

Sidney A Coon

2013-03-26T23:59:59.000Z

257

Real time selective harmonic minimization for multilevel inverters using genetic algorithm and artifical neural network angle generation  

Science Conference Proceedings (OSTI)

The work developed here proposes a methodology for calculating switching angles for varying DC sources in a multilevel cascaded H-bridges converter. In this approach the required fundamental is achieved, the lower harmonics are minimized, and the system can be implemented in real time with low memory requirements. Genetic algorithm (GA) is the stochastic search method to find the solution for the set of equations where the input voltages are the known variables and the switching angles are the unknown variables. With the dataset generated by GA, an artificial neural network (ANN) is trained to store the solutions without excessive memory storage requirements. This trained ANN then senses the voltage of each cell and produces the switching angles in order to regulate the fundamental at 120 V and eliminate or minimize the low order harmonics while operating in real time.

Filho, Faete J [ORNL; Tolbert, Leon M [ORNL; Ozpineci, Burak [ORNL

2012-01-01T23:59:59.000Z

258

Application of the Space-Time Method to Stimulated Raman Adiabatic Passage on the Simple Harmonic Oscillator  

E-Print Network (OSTI)

The space-time method is applied to a model system-the Simple Harmonic Oscillator in a laser field to simulate the Stimulated Raman Adiabatic Passage (STIRAP) process. The Space-Time method is a computational theory first introduced by Weatherford et. al. to solve Time-Dependent Systems with one boundary value and applied to electron spin system with invariant Hamiltonian [Journal of Molecular Structure {\\bf 592} 47]. The implementation in the present work provides an efficient and general way to solve the Time-Dependent Schr{\\"o}dinger Equation and can be applied to multi-state systems. The algorithm for simulating the Simple Harmonic Oscillator STIRAP can be applied to solve STIRAP problems for complex systems.

Xingjun Zhang; Charles A. Weatherford

2013-06-02T23:59:59.000Z

259

Application of the Space-Time Method to Stimulated Raman Adiabatic Passage on the Simple Harmonic Oscillator  

E-Print Network (OSTI)

The space-time method is applied to a model system-the Simple Harmonic Oscillator in a laser field to simulate the Stimulated Raman Adiabatic Passage (STIRAP) process. The Space-Time method is a computational theory first introduced by Weatherford et. al. to solve Time-Dependent Systems with one boundary value and applied to electron spin system with invariant Hamiltonian [Journal of Molecular Structure {\\bf 592} 47]. The implementation in the present work provides an efficient and general way to solve the Time-Dependent Schr{\\"o}dinger Equation and can be applied to multi-state systems. The algorithm for simulating the Simple Harmonic Oscillator STIRAP can be applied to solve STIRAP problems for complex systems.

Zhang, Xingjun

2013-01-01T23:59:59.000Z

260

Phase matching of high order harmonic generation using dynamic phase modulation caused by a non-collinear modulation pulse  

DOE Patents (OSTI)

Phase matching high harmonic generation (HHG) uses a single, long duration non-collinear modulating pulse intersecting the driving pulse. A femtosecond driving pulse is focused into an HHG medium (such as a noble gas) to cause high-harmonic generation (HHG), for example in the X-ray region of the spectrum, via electrons separating from and recombining with gas atoms. A non-collinear pulse intersects the driving pulse within the gas, and modulates the field seen by the electrons while separated from their atoms. The modulating pulse is low power and long duration, and its frequency and amplitude is chosen to improve HHG phase matching by increasing the areas of constructive interference between the driving pulse and the HHG, relative to the areas of destructive interference.

Cohen, Oren (Boulder, CO); Kapteyn, Henry C. (Boulder, CO); Mumane, Margaret M. (Boulder, CO)

2010-02-16T23:59:59.000Z

Note: This page contains sample records for the topic "hartley harmon oldham" 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

Revealing molecular structure and dynamics through high-order harmonic generation driven by mid-IR fields  

SciTech Connect

High-order harmonic generation (HHG) from molecules produces spectra that are modulated by interferences that encode both the static structure and the electron dynamics initiated by interaction with the laser field. Using a midinfrared (mid-IR) laser at 1300 nm, we are able to study the region of the harmonic spectrum containing such interferences in CO{sub 2} over a wide range of intensities. This allows for isolation and characterization of interference minima arising due to subcycle electronic dynamics triggered by the laser field, which had previously been identified but not systematically separated. Our experimental and theoretical results demonstrate important steps toward combining attosecond temporal and angstrom-scale spatial resolution in molecular HHG imaging.

Torres, R.; Siegel, T.; Brugnera, L.; Ivanov, M. Yu.; Marangos, J. P. [Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2BW (United Kingdom); Procino, I. [Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT (United Kingdom); Underwood, Jonathan G. [Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT (United Kingdom); Central Laser Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX (United Kingdom); Altucci, C.; Velotta, R. [Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia and Dipartimento di Scienze Fisiche, Universita di Napoli 'Federico II', Naples (Italy); Springate, E.; Froud, C.; Turcu, I. C. E. [Central Laser Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX (United Kingdom); Patchkovskii, S. [Steacie Institute for Molecular Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario K1A 0R6 (Canada); Smirnova, O. [Max-Born-Institute, 2a Max-Born-Strasse, Berlin D-12489 (Germany)

2010-05-15T23:59:59.000Z

262

Industrial harmonic analysis system for magnetic measurements of SSC collider arc and high energy booster corrector magnets  

Science Conference Proceedings (OSTI)

The SSCL collider arc and high energy booster corrector magnets are 50 mm bore cryogenic magnets. The integral strength and harmonics will be measured by industry at full current at 4.2 K and at plus and minus 400 mA at room temperature. Dipoles, quadrupoles, and sextupoles have error tolerances of a few tens of units. A prototype harmonic analysis system for magnetic measurements of production and prototype dipole, quadrupole and sextupole magnets has been designed and is being fabricated. We describe the criteria for search coil designs, data acquisition system hardware and software. Radial search coil arrays are being fabricated utilizing multifilar wire. Two digital integrators will allow simultaneous accumulation of unbucked and bucked configurations.

Green, M.I.; Sponsel, R.; Sylvester, C.

1993-05-01T23:59:59.000Z

263

Exact Solution for the Stokes Problem of an Infinite Cylinder in a Fluid with Harmonic Boundary Conditions at Infinity  

E-Print Network (OSTI)

We present an exact solution for the time-dependent Stokes problem of an infinite cylinder of radius r=a in a fluid with harmonic boundary conditions at infinity. This is a 3-dimensional problem but, because of translational invariance along the axis of the cylinder it effectively reduces to a 2-dimensional one. The Stokes problem being a linear reduction of the full Navier-Stokes equations, we show how to satisfy the no-slip boundary condition at the cylinder surface and the harmonic boundary condition at infinity, exhibit the full velocity field for radius r>a, and discuss the nature of the solutions for the specific case of air at sea level.

Andreas N. Vollmayr; Jan-Moritz P. Franosch; J. Leo van Hemmen

2008-03-31T23:59:59.000Z

264

Real Time Selective Harmonic Minimization for Multilevel Inverters Connected to Solar Panels Using Artificial Neural Network Angle Generation  

SciTech Connect

This work approximates the selective harmonic elimination problem using artificial neural networks (ANNs) to generate the switching angles in an 11-level full-bridge cascade inverter powered by five varying dc input sources. Each of the five full bridges of the cascade inverter was connected to a separate 195-W solar panel. The angles were chosen such that the fundamental was kept constant and the low-order harmonics were minimized or eliminated. A nondeterministic method is used to solve the system for the angles and to obtain the data set for the ANN training. The method also provides a set of acceptable solutions in the space where solutions do not exist by analytical methods. The trained ANN is a suitable tool that brings a small generalization effect on the angles' precision and is able to perform in real time (50-/60-Hz time window).

Tolbert, Leon M [ORNL; Ozpineci, Burak [ORNL; Filho, Faete [ORNL; Cao, Yue [ORNL

2011-01-01T23:59:59.000Z

265

Methods, systems and apparatus for optimization of third harmonic current injection in a multi-phase machine  

DOE Patents (OSTI)

Methods, system and apparatus are provided for increasing voltage utilization in a five-phase vector controlled machine drive system that employs third harmonic current injection to increase torque and power output by a five-phase machine. To do so, a fundamental current angle of a fundamental current vector is optimized for each particular torque-speed of operating point of the five-phase machine.

Gallegos-Lopez, Gabriel

2012-10-02T23:59:59.000Z

266

Compton harmonic resonances, stochastic instabilities, quasilinear diffusion, and collisionless damping with ultra-high intensity laser waves  

SciTech Connect

The dynamics of electrons in two-dimensional, linearly or circularly polarized, ultra-high intensity (above 10{sup 18}W/cm{sup 2}) laser waves, is investigated. The Compton harmonic resonances are identified as the source of various stochastic instabilities. Both Arnold diffusion and resonance overlap are considered. The quasilinear kinetic equation, describing the evolution of the electron distribution function, is derived, and the associated collisionless damping coefficient is calculated. The implications of these new processes are considered and discussed.

Rax, J.M.

1992-04-01T23:59:59.000Z

267

Renewable Diesel from Algal Lipids: An Integrated Baseline for Cost, Emissions, and Resource Potential from a Harmonized Model  

DOE Green Energy (OSTI)

The U.S. Department of Energy's Biomass Program has begun an initiative to obtain consistent quantitative metrics for algal biofuel production to establish an 'integrated baseline' by harmonizing and combining the Program's national resource assessment (RA), techno-economic analysis (TEA), and life-cycle analysis (LCA) models. The baseline attempts to represent a plausible near-term production scenario with freshwater microalgae growth, extraction of lipids, and conversion via hydroprocessing to produce a renewable diesel (RD) blendstock. Differences in the prior TEA and LCA models were reconciled (harmonized) and the RA model was used to prioritize and select the most favorable consortium of sites that supports production of 5 billion gallons per year of RD. Aligning the TEA and LCA models produced slightly higher costs and emissions compared to the pre-harmonized results. However, after then applying the productivities predicted by the RA model (13 g/m2/d on annual average vs. 25 g/m2/d in the original models), the integrated baseline resulted in markedly higher costs and emissions. The relationship between performance (cost and emissions) and either productivity or lipid fraction was found to be non-linear, and important implications on the TEA and LCA results were observed after introducing seasonal variability from the RA model. Increasing productivity and lipid fraction alone was insufficient to achieve cost and emission targets; however, combined with lower energy, less expensive alternative technology scenarios, emissions and costs were substantially reduced.

Davis, R.; Fishman, D.; Frank, E. D.; Wigmosta, M. S.; Aden, A.; Coleman, A. M.; Pienkos, P. T.; Skaggs, R. J.; Venteris, E. R.; Wang, M. Q.

2012-06-01T23:59:59.000Z

268

Jordan-Schwinger map, 3D harmonic oscillator constants of motion, and classical and quantum parameters characterizing electromagnetic wave polarization  

E-Print Network (OSTI)

In this work we introduce a generalization of the Jauch and Rohrlich quantum Stokes operators when the arrival direction from the source is unknown {\\it a priori}. We define the generalized Stokes operators as the Jordan-Schwinger map of a triplet of harmonic oscillators with the Gell-Mann and Ne'eman SU(3) symmetry group matrices. We show that the elements of the Jordan-Schwinger map are the constants of motion of the three-dimensional isotropic harmonic oscillator. Also, we show that generalized Stokes Operators together with the Gell-Mann and Ne'eman matrices may be used to expand the polarization density matrix. By taking the expectation value of the Stokes operators in a three-mode coherent state of the electromagnetic field, we obtain the corresponding generalized classical Stokes parameters. Finally, by means of the constants of motion of the classical three-dimensional isotropic harmonic oscillator we describe the geometric properties of the polarization ellipse

R. D. Mota; M. A. Xicotencatl; V. D. Granados

2008-01-30T23:59:59.000Z

269

HARMONIC IN-PAINTING OF COSMIC MICROWAVE BACKGROUND SKY BY CONSTRAINED GAUSSIAN REALIZATION  

SciTech Connect

The presence of astrophysical emissions between the last scattering surface and our vantage point requires us to apply a foreground mask on cosmic microwave background (CMB) sky maps, leading to large cuts around the Galactic equator and numerous holes. Since many CMB analysis, in particular on the largest angular scales, may be performed on a whole-sky map in a more straightforward and reliable manner, it is of utmost importance to develop an efficient method to fill in the masked pixels in a way compliant with the expected statistical properties and the unmasked pixels. In this Letter, we consider the Monte Carlo simulation of a constrained Gaussian field and derive it CMB anisotropy in harmonic space, where a feasible implementation is possible with good approximation. We applied our method to simulated data, which shows that our method produces a plausible whole-sky map, given the unmasked pixels, and a theoretical expectation. Subsequently, we applied our method to the Wilkinson Microwave Anisotropy Probe foreground-reduced maps and investigated the anomalous alignment between quadrupole and octupole components. From our investigation, we find that the alignment in the foreground-reduced maps is even higher than the Internal Linear Combination map. We also find that the V-band map has higher alignment than other bands, despite the expectation that the V-band map has less foreground contamination than other bands. Therefore, we find it hard to attribute the alignment to residual foregrounds. Our method will be complementary to other efforts on in-painting or reconstructing the masked CMB data, and of great use to Planck surveyor and future missions.

Kim, Jaiseung; Naselsky, Pavel [Niels Bohr Institute and Discovery Center, Blegdamsvej 17, DK-2100 Copenhagen (Denmark); Mandolesi, Nazzareno, E-mail: jkim@nbi.dk [INAF/IASF, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna, Istituto Nazionale di Astrofisica, via Gobetti 101, I-40129 Bologna (Italy)

2012-05-01T23:59:59.000Z

270

PARAID: The Gear-Shifting Power-Aware RAID Charles Weddle, Mathew Oldham, Jin Qian, An-I Andy Wang, Florida State University  

E-Print Network (OSTI)

source of power usage. In web servers, disks typically accounts for 24% of the power usage; in proxy servers, 77% [4, 13]. Storage devices can account for as much as 27% of the electricity cost in a typical cooling requirements [18]. The combined effect also limits the density of computer racks. The lower

Wang, Andy

271

Explicit formulas for generalized harmonic perturbations of the infinite quantum well with an application to Mathieu equations  

SciTech Connect

We obtain explicit formulas for perturbative corrections of the infinite quantum well model. The formulas we obtain are based on a class of matrix elements that we construct by means of two-parameter ladder operators associated with the infinite quantum well system. Our approach can be used to construct solutions to Schroedinger-type equations that involve generalized harmonic perturbations of their potentials, such as cosine powers, Fourier series, and more general functions. As a particular case, we obtain characteristic values for odd periodic solutions of the Mathieu equation.

Garcia-Ravelo, J.; Trujillo, A. L. [Escuela Superior de Fisica y Matematicas, Instituto Politecnico Nacional, Unidad Profesional Adolfo Lopez Mateos, Zacatenco, 07738 Mexico D.F. (Mexico); Schulze-Halberg, A. [Department of Mathematics and Actuarial Science, Indiana University Northwest, 3400 Broadway, Gary, Indiana 46408 (United States)

2012-10-15T23:59:59.000Z

272

The quantum harmonic oscillator on the sphere and the hyperbolic plane: {kappa}-dependent formalism, polar coordinates, and hypergeometric functions  

Science Conference Proceedings (OSTI)

A nonlinear model representing the quantum harmonic oscillator on the sphere and the hyperbolic plane is solved in polar coordinates (r,{phi}) by making use of a curvature-dependent formalism. The curvature {kappa} is considered as a parameter and then the radial Schroedinger equation becomes a {kappa}-dependent Gauss hypergeometric equation. The energy spectrum and the wave functions are exactly obtained in both the sphere S{sup 2} ({kappa}>0) and the hyperbolic plane H{sup 2} ({kappa}<0). A comparative study between the spherical and the hyperbolic quantum results is presented.

Carinena, Jose F.; Ranada, Manuel F.; Santander, Mariano [Departmento de Fisica Teorica, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza (Spain); Departamento de Fisica Teorica, Facultad de Ciencias, Universidad de Valladolid, 47011 Valladolid (Spain)

2007-10-15T23:59:59.000Z

273

High-temperature thermodynamics of strongly interacting s-wave and p-wave Fermi gases in a harmonic trap  

SciTech Connect

We theoretically investigate the high-temperature thermodynamics of a strongly interacting trapped Fermi gas near either s-wave or p-wave Feshbach resonances, using a second-order quantum virial expansion. The second virial coefficient is calculated based on the energy spectrum of two interacting fermions in a harmonic trap. We consider both isotropic and anisotropic harmonic potentials. For the two-fermion interaction, either s-wave or p-wave, we use a pseudopotential parametrized by a scattering length and an effective range. This turns out to be the simplest way of encoding the energy dependence of the low-energy scattering amplitude or phase shift. This treatment of the pseudopotential can be easily generalized to higher partial-wave interactions. We discuss how the second virial coefficient and thermodynamics are affected by the existence of these finite-range interaction effects. The virial expansion result for a strongly interacting s-wave Fermi gas has already been proved very useful. In the case of p-wave interactions, our results for the high-temperature equation of state are applicable to future high-precision thermodynamic measurements for a spin-polarized Fermi gas near a p-wave Feshbach resonance.

Peng Shiguo [Department of Physics, Tsinghua University, Beijing, 100084 (China); Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Melbourne 3122 (Australia); Li Shiqun [Department of Physics, Tsinghua University, Beijing, 100084 (China); Drummond, Peter D.; Liu Xiaji [Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Melbourne 3122 (Australia)

2011-06-15T23:59:59.000Z

274

First-order thermal correction to the quadratic response tensor and rate for second harmonic plasma emission  

SciTech Connect

Three-wave interactions in plasmas are described, in the framework of kinetic theory, by the quadratic response tensor (QRT). The cold-plasma QRT is a common approximation for interactions between three fast waves. Here, the first-order thermal correction (FOTC) to the cold-plasma QRT is derived for interactions between three fast waves in a warm unmagnetized collisionless plasma, whose particles have an arbitrary isotropic distribution function. The FOTC to the cold-plasma QRT is shown to depend on the second moment of the distribution function, the phase speeds of the waves, and the interaction geometry. Previous calculations of the rate for second harmonic plasma emission (via Langmuir-wave coalescence) assume the cold-plasma QRT. The FOTC to the cold-plasma QRT is used here to calculate the FOTC to the second harmonic emission rate, and its importance is assessed in various physical situations. The FOTC significantly increases the rate when the ratio of the Langmuir phase speed to the electron thermal speed is less than about 3.

Layden, B.; Cairns, Iver H.; Robinson, P. A. [School of Physics, University of Sydney, Sydney, New South Wales 2006 (Australia); Percival, D. J. [Defence Science and Technology Organisation, P.O. Box 1500, Edinburgh, South Australia 5111 (Australia)

2011-02-15T23:59:59.000Z

275

Analytical transformed harmonic oscillator basis for three-body nuclei of astrophysical interest: Application to 6He  

E-Print Network (OSTI)

Recently, a square-integrable discrete basis, obtained performing a simple analytical local scale transformation to the harmonic oscillator basis, has been proposed and successfully applied to study the properties of two-body systems. Here, the method is generalized to study three-body systems. To test the goodness of the formalism and establish its applicability and limitations, the capture reaction rate for the nucleosynthesis of the Borromean nucleus 6He (4He + n + n) is addressed. Results are compared with previous publications and with calculations based on actual three-body continuum wave functions, which can be generated for this simple case. The obtained results encourage the application to other Borromean nuclei of astrophysical interest such as 9Be and 12C, for which actual three-body continuum calculations are very involved.

J. Casal; M. Rodrguez-Gallardo; J. M. Arias

2013-07-24T23:59:59.000Z

276

Path Integral Approach to the Calculation of Reaction Rates for a Reaction Coordinate Coupled to a Dual Harmonic Bath  

E-Print Network (OSTI)

We present a new method for the numerical calculation of canonical reaction rate constants in complex molecular systems, which is based on a path integral formulation of the flux-flux correlation function. Central is the partitioning of the total system into a relevant part coupled to a dual bath. The latter consists of two parts: First, a set of strongly coupled harmonic modes, describing, for example, intramolecular degrees of freedom. They are treated on the basis of a reaction surface Hamiltonian approach. Second, a set of bath modes mimicking an unspecific environment modeled by means of a continuous spectral density. After deriving a set of general equations expressing the canonical rate constant in terms of appropriate influence functionals, several approximations are introduced to provide an efficient numerical implementation. Results for an initial application to the H-transfer in 6-Aminofulvene-1-aldimine are discussed.

Yang, Yonggang

2011-01-01T23:59:59.000Z

277

Harmonic Responses in 2DEG AlGaAs/GaAs HEMT Devices Due to Plasma Wave Interaction  

Science Conference Proceedings (OSTI)

Plasma waves are oscillations of electron density in time and space, and in deep submicron field effect transistors, typical plasma frequencies, omega{sub p}, lie in the terahertz range and do not involve any quantum transitions. Hence, using plasma wave excitation for detection and/or generation of THz oscillations is a very promising approach. In this paper, the investigation of plasma wave interaction between the plasma waves propagating in a short-channel High-Electron-Mobility Transistor (HEMT) and the radiated electromagnetic waves was carried out. Experimentally, we have demonstrated the detection of the terahertz (THz) radiation by an AlGaAs/GaAs HEMT up to third harmonic at room temperature and their resonant responses show very good agreement with the calculated results.

Hashim, A. M.; Alias, Q. I. [Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor (Malaysia); Kasai, S.; Hasegawa, H. [Research Center for Integrated Quantum Electronics, Hokkaido University North 12 West 8, Sapporo 060-8628 (Japan)

2010-03-11T23:59:59.000Z

278

Measurements and modeling of laser irradiance in the high-power third-harmonic Nova focus: Volume B, Data book. Volume 2  

SciTech Connect

This document contains analysis of third-harmonic equivalent plane photographs obtained in the 2PJW{underscore}3wspot series and described in the report under the same title, Volume A. The photographs that are analyzed in this data book are summarized. A description of the analysis output is included.

Wegner, P.

1992-05-01T23:59:59.000Z

279

A new uniform parameterization and invariant 3D spherical harmonic shape descriptors for shape analysis of the heart's left ventricle - A pilot study  

Science Conference Proceedings (OSTI)

A new approach for uniform parameterization and rotation invariant global description of 3D triangular surface meshes of objects with a spherical topology is presented. It consists of two steps. First, an initial mapping based on a heat conduction model ... Keywords: Left ventricle, Myocardial scintigraphy, Rotation invariant 3D shape descriptors, Spherical harmonic model, Uniform parameterization

A. Ben Abdallah; F. Ghorbel; K. Chatti; H. Essabbah; M. H. Bedoui

2010-10-01T23:59:59.000Z

280

High Harmonic Fast Wave Heating Efficiency Enhancemen and Current Drive at Longer Wavelength on the National Spherical Torus Experiment  

SciTech Connect

High harmonic fast wave heating and current drive (CD) are being developed on the National Spherical Torus Experiment (NSTX) [M. Ono et al., Nucl. Fusion 41, 1435 (2001)] for supporting startup and sustainment of the ST plasma. Considerable enhancement of the core heating efficiency (?) from 44% to 65% has been obtained for CD phasing of the antenna (strap-to-strap ? = -90o, k? = -8 m-1) by increasing the magnetic field from 4.5 kG to 5.5 kG. This increase in efficiency is strongly correlated to moving the location of the onset density for perpendicular fast wave propagation (nonset ? ?? k|| 2/w) away from the antenna face and wall, and hence reducing the propagating surface wave fields. RF waves propagating close to the wall at lower B? and k|| can enhance power losses from both the parametric decay instability (PDI) and wave dissipation in sheaths and structures around the machine. The improved efficiency found here is attributed to a reduction in the latter, as PDI losses are little changed at the higher magnetic field. Under these conditions of higher coupling efficiency, initial measurements of localized CD effects have been made and compared with advanced RF code simulations

J. Hosea, R. E. Bell, B.P. LeBlanc, C.K. Phillips, G. Taylor, E. Valeo, J.R. Wilson, E.F. Jaeger, P.M. Ryan, J. Wilgen, H. Yuh, F. Levinton, S. Sabbagh, K. Tritz, J. Parker, P.T. Bonoli, R. Harvey, and the NSTX Team

2008-01-14T23:59:59.000Z

Note: This page contains sample records for the topic "hartley harmon oldham" 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

High Harmonic Fast Wave Heating Efficiency Enhancement and Current Drive at Longer Wavelength on the National Spherical Torus Experiment  

Science Conference Proceedings (OSTI)

High harmonic fast wave heating and current drive CD are being developed on the National Spherical Torus Experiment M. Ono et al., Nucl. Fusion 41, 1435 2001 for supporting startup and sustainment of the spherical torus plasma. Considerable enhancement of the core heating efficiency from 44% to 65% has been obtained for CD phasing of the antenna strap-to-strap = 90 , k= 8 m 1 by increasing the magnetic field from 4.5 to 5.5 kG. This increase in efficiency is strongly correlated to moving the location of the onset density for perpendicular fast wave propagation nonsetBk 2 / away from the antenna face and wall, and hence reducing the propagating surface wave fields. Radio frequency RF waves propagating close to the wall at lower B and k can enhance power losses from both the parametric decay instability PDI and wave dissipation in sheaths and structures around the machine. The improved efficiency found here is attributed to a reduction in the latter, as PDI losses are little changed at the higher magnetic field. Under these conditions of higher coupling efficiency, initial measurements of localized CD effects have been made and compared with advanced RF code simulations.

Hosea, J. [Princeton Plasma Physics Laboratory (PPPL); Bell, R. E. [Princeton Plasma Physics Laboratory (PPPL); LeBlanc, B [Princeton Plasma Physics Laboratory (PPPL); Phillips, Cynthia [Princeton Plasma Physics Laboratory (PPPL); Taylor, G. [Princeton Plasma Physics Laboratory (PPPL); Valeo, Dr Ernest [Princeton Plasma Physics Laboratory (PPPL); Wilson, J. R. [Princeton Plasma Physics Laboratory (PPPL); Jaeger, Erwin Frederick [ORNL; Ryan, Philip Michael [ORNL; Wilgen, John B [ORNL; Yuh, H. [Nova Photonics; Levinton, F. [Fusion Physics and Technology; Sabbagh, S. A. [Columbia University; Tritz, K. [Johns Hopkins University; Parker, J. [Cornell University; Bonoli, P. [Massachusetts Institute of Technology (MIT); Harvey, R. W. [CompX, Del Mar, CA

2008-01-01T23:59:59.000Z

282

Analysis of the electrical harmonic characteristics of a slip recovery variable speed generating system for wind turbine applications  

SciTech Connect

Variable speed electric generating technology can enhance the general use of wind energy in electric utility applications. This enhancement results from two characteristic properties of variable speed wind turbine generators: an improvement in drive train damping characteristics, which results in reduced structural loading on the entire wind turbine system, and an improvement in the overall efficiency by using a more sophisticated electrical generator. Electronic converter systems are the focus of this investigation -- in particular, the properties of a wound-rotor induction generator with the slip recovery system and direct-current link converter. Experience with solid-state converter systems in large wind turbines is extremely limited. This report presents measurements of electrical performances of the slip recovery system and is limited to the terminal characteristics of the system. Variable speed generating systems working effectively in utility applications will require a satisfactory interface between the turbine/generator pair and the utility network. The electrical testing described herein focuses largely on the interface characteristics of the generating system. A MOD-O wind turbine was connected to a very strong system; thus, the voltage distortion was low and the total harmonic distortion in the utility voltage was less than 3% (within the 5% limit required by most utilities). The largest voltage component of a frequency below 60 Hz was 40 dB down from the 60-Hz< component. 8 refs., 14 figs., 8 tabs.

Herrera, J.I.; Reddoch, T.W.

1988-02-01T23:59:59.000Z

283

Minimum variational principles for time-harmonic waves in a dissipative medium and associated variational principles of Hashin--Shtrikman type  

E-Print Network (OSTI)

Minimization variational principles for linear elastodynamic, acoustic, or electromagnetic time-harmonic waves in dissipative media were obtained by Milton, Seppecher and Bouchitt\\'e generalizing the quasistatic variational principles of Cherkaev and Gibiansky. Here a further generalization is made to allow for a much wider variety of boundary conditions, and in particular Dirichlet and Neumann boundary conditions. In addition minimization or maximization principles of the Hashin-Shtrikman type, incorporating "polarization fields", are developed.

Graeme W. Milton; John R. Willis

2010-01-15T23:59:59.000Z

284

Quantum Harmonic Black Holes  

E-Print Network (OSTI)

Inspired by the recent conjecture that black holes are condensates (of gravitons), we investigate a simple model for the black hole degrees of freedom that is consistent both from the point of view of Quantum mechanics and of General Relativity. Since the two perspectives should converge for small, Planck size, black holes, we expect our construction is useful for understanding the physics of microscopic, quantum black holes.

Casadio, R

2013-01-01T23:59:59.000Z

285

Harmonic parameterization by electrostatics  

Science Conference Proceedings (OSTI)

In this article, we introduce a method to apply ideas from electrostatics to parameterize the open space around an object. By simulating the object as a virtually charged conductor, we can define an object-centric coordinate system which we call Electric ... Keywords: Coordinates, cloth control, parameterization

He Wang, Kirill A. Sidorov, Peter Sandilands, Taku Komura

2013-09-01T23:59:59.000Z

286

Technical Study Addresses a Key Challenge to Harmonizing U.S. and International PV Module Standards (Fact Sheet)  

DOE Green Energy (OSTI)

NREL builds community and industry support by addressing concerns voiced by key standards organizations. Photovoltaic (PV) manufacturers in the United States test the safety of their products using standards developed through consensus processes. Because U.S. PV module safety standards are not aligned with international standards, manufacturers must test their modules twice - and sometimes maintain separate product lines. By meeting with standards organizations such as the Solar ABCs and Underwriters Laboratories (UL), National Renewable Energy Laboratory (NREL) leaders have worked to identify different stakeholders priorities and concerns. UL, specifically, has expressed concern that the international standards do not address all possible risks. For example, new encapsulant materials could soften at high temperatures and frameless modules could slide apart, exposing live electrical parts or allowing glass to fall on a person below. The deformation of a solid material under the influence of mechanical stresses is known as 'creep.' Current module qualification tests are limited to 85 C, whereas modules can, for short times, reach 105 C outdoors. In response to UL's concern, NREL designed and executed an experiment to compare on-sun and accelerated rates of creep for modules fabricated with various encapsulants, including some that have low melting points. Objectives were to (1) evaluate the potential for creep in outdoor exposure, (2) provide guidance on the risks and design needs with thermoplastic materials, and (3) provide a basis for modifying standards to account for materials with potential to creep. The study tested experimental materials with eight representative encapsulants in both outdoor and indoor (chamber) exposure. The study found that modules with materials that were expected to creep did so in the indoor exposure, but not in most outdoor environments and mounting configurations. The results provide a basis for defining an accelerated test needed to give confidence that the modules will not slide apart on hot days. The proposal for IEC 61730 Part 1 exposes modules for 200 hours to a temperature between 105 C and 110 C. NREL is collaborating with UL representatives, and U.S. and international standards appear to be closer to harmonization.

Not Available

2012-07-01T23:59:59.000Z

287

Coherent terahertz radiation from high-harmonic component of modulated free-electron beam in a tapered two-asymmetric grating structure  

SciTech Connect

Based on the mechanism of incoherent diffraction radiation excited by an electron bunch in a waveguide with periodic structure, this paper presents the concept of coherent terahertz (THz) radiation from the high-harmonic component of a modulated free-electron beam in a tapered two-asymmetric grating structure. The results show that in this mechanism 0.43 THz radiation can be generated with 10 A/cm{sup 2} current density, and the efficiency can reach 0.5%. Because of the low required current density and relative high efficiency, this concept shows the application potential for electron-beam-driven terahertz sources.

Zhang Yaxin; Zhou Yucong; Dong Liang; Liu Shenggang [Terahertz Science and Technology Research Center, University of Electronic Science and Technology of China, Chengdu 610054 (China)

2012-09-17T23:59:59.000Z

288

Study of interfacial charge-transfer complex on TiO{sub 2} particles in aqueous suspension by second-harmonic generation  

Science Conference Proceedings (OSTI)

Titanium dioxide (TiO{sub 2}) is a wide band-gap semiconductor having two common crystal forms: rutile and anatase. Due to its high physical and chemical stability, it is extensively studied as a photocatalyst for photolysis of water, and for oxidative photomineralization of organic pollutants in wastewater, aimed at harvesting solar energy. The authors report the first direct observation of an interfacial charge-transfer complex using second-harmonic spectroscopy. The second-harmonic spectrum of catechol adsorbed on 0.4 micron-sized TiO{sub 2} (anatase) colloidal particles in aqueous suspension reveals a charge-transfer band centered at 2.72 eV (456 nm). In addition, the adsorption isotherm of catechol on the colloidal TiO{sub 2} suspension was obtained and gave an excellent fit to the Langmuir adsorption model. From this, the authors infer the free energy of the adsorption to be {Delta}G{degree} = {minus}6.8 kcal/mol.

Liu, Y.; Dadap, J.I.; Zimdars, D.; Eisenthal, K.B. [Columbia Univ., New York, NY (United States). Dept. of Chemistry

1999-04-01T23:59:59.000Z

289

Disentangling flow and nonflow correlations via Bayesian unfolding of the event-by-event distributions of harmonic coefficients in ultrarelativistic heavy-ion collisions  

E-Print Network (OSTI)

The performance of the Bayesian unfolding method in extracting the event-by-event (EbyE) distributions of harmonic flow coefficients v_n is investigated using a toy model simulation, as well as simulations based on the HIJING and AMPT models. The unfolding method is shown to recover the input v_2-v_4 distributions for multiplicities similar to those observed in Pb+Pb collisions at the LHC. The effects of the nonflow are evaluated using HIJING simulation with and without a flow afterburner. The probability distribution of v_n resulting only from nonflow in HIJING is nearly a Gaussian and can be largely suppressed in the data-driven unfolding method used by the ATLAS Collaboration. The residual nonflow effects have no appreciable impact on the v_3 distributions, but are found to affect the tails of the v_2 and v_4 distributions; these effects manifest as a small simultaneous change in the mean and standard deviation of the $v_n$ distributions. For the AMPT model, which contains both flow fluctuations and nonflow effects, the reduced shape of the extracted v_n distributions is found to be independent of pT in the low pT region, similar to what is observed in the ATLAS data. The prospect of using the EbyE distribution of the harmonic spectrum aided by the unfolding technique as a general tool to study azimuthal correlations in high energy collisions is also discussed.

Jiangyong Jia; Soumya Mohapatra

2013-04-04T23:59:59.000Z

290

PROJECT SHEET SUBCOMMITTEE: Food Residues Subcommittee PROJECT TITLE: Expansion, Development and Harmonization of Crop Groups With Specified Representative Crops for Field Crop Residues Studies  

E-Print Network (OSTI)

GOAL/OBJECTIVE: To further develop and implement Crop groups utilized by NAFTA and based on representative commodities to foster worldwide harmonization of Crop groups and commodity terminology which will help remove trade irritants due to differences in commodity tolerance levels or MRLs for minor and specialty crops. PROJECT DESCRIPTION/PROCEDURE The Chairperson (Hong Chen) of the International Crop Grouping Consulting Committee (ICGCC) forwards the Symposium proposal for a particular crop group to the appropriate workgroup of the ICGCC via emails and requests the workgroup members to provide input on crop information and maximum residue limit (MRL) information (includes U.S., NAFTA, Codex and EU) on the commodities. Growers and commodity experts also provide valuable input on commodities. International members provide specific information on the commodities grown in their countries and regions which provides perspectives on harmonization approaches. Based on the input, the ICGCC Chairperson will prepare commodity monographs, divide subgroups, select representative crops and draft new crop group petitions. The draft petitions will be forwarded to the workgroup for review and comments before being finalized, and the

unknown authors

2007-01-01T23:59:59.000Z

291

High-order optical harmonic generation as a process of single atom interaction with sub-relativistic single- and multicolor laser fields  

Science Conference Proceedings (OSTI)

We present a non-perturbative theory of a single atom interaction with the multicolor laser field. The theory is based on the use of exact mathematical solutions of the boundary value problem for 'an atom in the external field', as a result the case of arbitrary orientation of atomic angular momentum and electromagnetic wave polarization vector can be described in the consistent mathematical form. We also present the results of numerical simulations on silver and argon atoms interaction with single-and two-color laser fields formed by fundamental frequency and second harmonic of Ti:Sapphire laser. The results of numerical calculations show that the efficiency of high-order harmonic generation (HHG) depends strongly on the laser field parameters (especially on the orientation of polarization vectors and chirp of the two-color laser field components). We have demonstrated the saturation of the cut-off frequency in the laser fields of near-atomic strength and investigated the impact of the field phase in the case of ultrashort laser pulses.

Andreev, A. V.; Stremoukhov, S. Yu.; Shoutova, O. A. [M. V. Lomonosov Moscow State University, physical department, 119991 Leninskie Gory, 1, build. 2, Moscow (Russian Federation)

2012-07-30T23:59:59.000Z

292

Preparation, characterization, and second-harmonic generation of a Langmuir-Blodgett film based on a rare-earth coordination compound  

Science Conference Proceedings (OSTI)

The rare-earth coordination compound (E)-N-hexadecyl-4-(2-(4-(dimethylamino)phenyl)-ethenyl)pyridinium tetrakis(1-phenyl-3-methyl-4-benzoyl-5-pyrazolonato)dysprosium(III) was synthesized. The LB films were prepared and characterized by UV-vis, IR, X-ray photoelectron spectroscopy, and low-angle X-ray diffraction. High-quality LB films up to 50 layers on the hydrophilic substrates of quartz, calcium fluoride, and glass were obtained. From the second-harmonic generation measurement, second-order molecular hyperpolarizability {beta} of the dysprosium complex was estimated to be about (6.6-9.3) x 10{sup {minus}28} esu. 14 refs., 6 figs., 1 tab.

Wang, K.Z.; Huang, C.H.; Xu, G.X.; Zhao, X.S.; Xie, X.M.; Wu, N.Z. [Peking Univ., Beijing (China); Xu, Y.; Liu, Y.Q.; Zhu, D.B. [Institute of Chemistry, Beijing (China)

1994-11-01T23:59:59.000Z

293

Cerenkov-type phase-matched second-harmonic emission from GaAs/AlGaAs quantum-cascade lasers  

SciTech Connect

Second-harmonic (SH) emission in the form of Cerenkov-type phase-matched radiation has been measured for quantum-cascade lasers (QCLs) with built-in nonlinearities. The QCLs operate at 10.9 {mu}m wavelength and, due to material dispersion, show a high collinear phase mismatch, resulting in low SH external conversion efficiencies on the order of 2 {mu}W/W{sup 2}. Due to our waveguide design, we were able to couple out and measure the generated SH light in the form of Cerenkov-type phase-matched radiation from the substrate of the device. The SH power collected from the Cerenkov beam leads to an increased external conversion efficiency of {approx}50 {mu}W/W{sup 2}.

Austerer, M.; Detz, H.; Schartner, S.; Nobile, M.; Schrenk, W.; Andrews, A. M.; Klang, P. [Center for Micro- and Nanostructures, TU Vienna, Floragasse 7, A-1040 Vienna (Austria); Strasser, G. [Departments of Electrical Engineering and Physics, SUNY at Buffalo, New York 14260 (United States)

2008-03-17T23:59:59.000Z

294

Comparison of bounce-averaged quasilinear theory with charge exchange measurements during minority fundamental and majority second harmonic ICRF heating in PLT  

DOE Green Energy (OSTI)

Previous studies in PLT using charge-exchange, edge probe, and fusion product diagnostics all indicate that ICRF tends to produce energetic trapped particles whose banana tips are near the resonance layer. A bounce-averaged quasilinear operator which predicts this ''resonance localization'' has been implemented in a Fokker-Planck code in order to make detailed comparisons with measurements. Good agreement is found with data from the horizontally-scanning, mass-resolving, charge-exchange analyzer, although the RF power profile seems to be broader than expected. We have recently observed a deuterium tail during hydrogen minority heating. The shape of this tail and its scaling with RF power agree well with the quasilinear theory. These measurements indicate that as much as 30% of the central RF power goes into direct second harmonic deuterium heating.

Hammett, G.W.; Colestock, P.L.; Gammel, G.; Goldston, R.J.; Hosea, J.C.; Hwang, D.Q.; Kaita, R.; Ono, M.; Roquemore, L.; Wilson, J.R.

1985-07-01T23:59:59.000Z

295

Studies of azimuthal anisotropy harmonics in ultra-central PbPb collisions at sqrt(s[NN]) = 2.76 TeV  

E-Print Network (OSTI)

Azimuthal dihadron correlations of charged particles have been measured in PbPb collisions at sqrt(s[NN]) = 2.76 TeV by the CMS collaboration, using data from the 2011 LHC heavy-ion run. The data set includes a sample of ultra-central (0-0.2% centrality) PbPb events collected using a trigger based on total transverse energy in the hadron forward calorimeters and the total multiplicity of pixel clusters in the silicon pixel tracker. A total of about 1.8 million ultra-central events were recorded, corresponding to an integrated luminosity of 120 inverse microbarns. The observed correlations in ultra-central PbPb events are expected to be particularly sensitive to initial-state fluctuations. The single-particle anisotropy Fourier harmonics, from v[2] to v[6], are extracted as a function of particle transverse momentum. At higher transverse momentum, the v[2] harmonic becomes significantly smaller than the higher-order v[n] (n greater than or equal to 3). The pt-averaged v[2] and v[3] are found to be equal within 2%, while higher-order v[n] decrease as n increases. The breakdown of factorization of dihadron correlations into single-particle azimuthal anisotropies is observed. This effect is found to be most prominent in the ultra-central PbPb collisions, where the initial-state fluctuations play a dominant role. A comparison of the factorization data to hydrodynamic predictions with event-by-event fluctuating initial conditions is also presented.

CMS Collaboration

2013-12-06T23:59:59.000Z

296

Harmonization of Land-Use Scenarios for the Period 1500-2100: 600 Years of Global Gridded Annual Land-Use Transitions, Wood Harvest, and Resulting Secondary Lands  

SciTech Connect

In preparation for the fifth Assessment Report (AR5) of the Intergovernmental Panel on Climate Change (IPCC), the international community is developing new advanced Earth System Models (ESM) to assess the combined effects of human activities (e.g. land use and fossil fuel emissions) on the carbon-climate system. In addition, four Representative Concentration Pathway (RCP) scenarios of the future (2005-2100) are being provided by four Integrated Assessment Model (IAM) teams to be used as input to the ESMs for future carbon-climate projections (Moss et al., 2010). The diversity of approaches and requirements among IAMs and ESMs for tracking land-use change, along with the dependence of model projections on land-use history, presents a challenge for effectively passing data between these communities and for smoothly transitioning from the historical estimates to future projections. Here, a harmonized set of land-use scenarios are presented that smoothly connects historical reconstructions of land use with future projections, in the format required by ESMs.

Hurtt, George; Chini, Louise Parsons; Frolking, Steve; Betts, Richard; Feddema, Johannes; Fischer, Gavin M.; Fisk, J.P.; Hibbard, Kathleen A.; Houghton, R. A.; Janetos, Anthony C.; Jones, C.; Kindermann, G.; Kinoshita, Tsuguki; Goldeweijk, Kees K.; Riahi, Keywan; Shevliakova, Elena; Smith, Steven J.; Stehfest, Eike; Thomson, Allison M.; Thornton, P.; Van Vuuren, Detlef; Wang, Y.

2011-08-08T23:59:59.000Z

297

Correction of Doi-Edwards' Green Function for a Chain in a Harmonic Potential and its Implication for the Stress-Optical Rule  

E-Print Network (OSTI)

We provide a corrected Green's function for a polymer chain trapped in a two-dimensional anisotropic harmonic potential with a fixed boundary condition. This Green's function is a modified version of what Doi and Edwards first derived to describe the polymer chain confined in the tube-like domain of surrounding entangled polymers [J. Chem. Soc. Farad. Trans. II 74 (1978) 1802]. In contradiction to the results found by Ianniruberto and Marrucci (IM) when applying the Doi-Edwards Green function [J. Non-Newtonian Fluid Mech. 79 (1998) 225], we find that the stress-optical rule is violated for any tube potential either circular or elliptic if the corrected Green's function is used. The violation is due to the presence of the virtual springs to confine the chain in the tube rather than the anisotropy of the confinement potential. On the other hand, Doi and Edwards used their Green's function only for estimation of the monomer density along the primitive path where we find just a small correction. Since they did not use it for rheological calculations, the stress-optic rule appears to be safe for the Doi-Edwards model.

Jay D. Schieber; Tsutomu Indei

2013-02-21T23:59:59.000Z

298

Nanograting-based compact VUV spectrometer and beam profiler for in-situ characterization of high-order harmonic generation light sources  

SciTech Connect

A compact, versatile device for VUV beam characterization is presented. It combines the functionalities of a VUV spectrometer and a VUV beam profiler in one unit and is entirely supported by a standard DN200 CF flange. The spectrometer employs a silicon nitride transmission nanograting in combination with a micro-channel plate based imaging detector. This enables the simultaneous recording of wavelengths ranging from 10 nm to 80 nm with a resolution of 0.25 nm to 0.13 nm. Spatial beam profiles with diameters up to 10 mm are imaged with 0.1 mm resolution. The setup is equipped with an in-vacuum translation stage that allows for in situ switching between the spectrometer and beam profiler modes and for moving the setup out of the beam. The simple, robust design of the device is well suited for non-intrusive routine characterization of emerging laboratory- and accelerator-based VUV light sources. Operation of the device is demonstrated by characterizing the output of a femtosecond high-order harmonic generation light source.

Kornilov, Oleg; Wilcox, Russell; Gessner, Oliver

2010-07-09T23:59:59.000Z

299

Optimal geometries and harmonic vibrational frequencies of the global minima of water clusters (H2O)n, n=2-6, and several hexamer local minima at the CCSD(T) level of theory  

SciTech Connect

We report the first optimum geometries and harmonic vibrational frequencies for the ring pentamer and several water hexamer (prism, cage, cyclic and two book) at the CCSD(T)/aug-cc-pVDZ level of theory. All five hexamer isomer minima previously reported by MP2 are also minima on the CCSD(T) potential energy surface (PES). In addition, all CCSD(T) minimum energy structures for the n=2-6 cluster isomers are quite close to the ones previously obtained by MP2 on the respective PESs, as confirmed by a modified Procrustes analysis that quantifies the difference between any two cluster geometries. The CCSD(T) results confirm the cooperative effect of the homodromic ring networks (systematic contraction of the nearest-neighbor (nn) intermolecular separations with cluster size) previously reported by MP2, albeit with O-O distances shorter by ~0.02 , indicating that MP2 overcorrects this effect. The harmonic frequencies at the minimum geometries were obtained by the double differentiation of the CCSD(T) energy using an efficient scheme based on internal coordinates that reduces the number of required single point energy evaluations by ~15% when compared to the corresponding double differentiation using Cartesian coordinates. Negligible differences between MP2 and CCSD(T) are found for the librational modes, while uniform increases of ~15 and ~25 cm-1 are observed for the bending and free OH harmonic frequencies. The largest differences between MP2 and CCSD(T) are observed for the harmonic hydrogen bonded frequencies. The CCSD(T) red shifts from the monomer frequencies (??) are smaller than the MP2 ones, due to the fact that the former produces shorter elongations (?R) of the respective hydrogen bonded OH lengths from the monomer value with respect to the latter. Both the MP2 and CCSD(T) results for the hydrogen bonded frequencies were found to closely follow the relation - ?? = s ? ?R, with a rate of s = 20.3 cm-1 / 0.001 . The CCSD(T) harmonic frequencies, when corrected using the MP2 anharmonicities obtained from second order vibrational perturbation theory (VPT2), produce anharmonicCCSD(T) estimates that are within < 60 cm-1 from the measured infrared (IR) active bands of the n=2-6 clusters and furthermore trace the observed red shifts with respect to the monomer (??) quite accurately. The energetic order between the various hexamer isomers on the PES (prism has the lowest energy) previously reported at MP2 was found to be preserved at the CCSD(T) level, whereas the inclusion of anharmonic corrections further stabilizes the cage among the hexamer isomers.

Miliordos, Evangelos; Apra, Edoardo; Xantheas, Sotiris S.

2013-09-21T23:59:59.000Z

300

Pantex Regional Middle School Science Bowl | U.S. DOE Office...  

Office of Science (SC) Website

Oldham, Parmer, Potter, Randall, Roberts, Sherman, and Swisher Date of Electric Car Competition: 4122014 Please contact the regional coordinator for more information on...

Note: This page contains sample records for the topic "hartley harmon oldham" 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

Molecular diagnostics: harmonization through reference ...  

Science Conference Proceedings (OSTI)

... GeT-RM: Genetic Testing Reference Materials Coordination Program; HSS: Department of Health and Human Services; IRMM: Institute for ...

2012-10-09T23:59:59.000Z

302

Harmonic engine - Energy Innovation Portal  

Solar Photovoltaic; Solar ... invention pursuant to Contract No. W-7405-ENG-48 between the United States Department of Energy and the University of California for the ...

303

Regional Cooperation and Harmonization on EESL  

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

能效标准、标识和认证 能效标准、标识和认证 区域协调与互认 李铁男, 研究员 国宏美亚(北京)工业节能减排技术促进中心 主任 ISO/TC 257 节能量 主席 国宏美亚(北京)工业节能减排技术促进中心 Center for Industrial Energy Efficiency (CIEE) 能效标准、标识和认证的作用 能效标准、标识和认证区域合作关注点与障碍 最佳实践:亚洲能效标准和标识/认证有效建立和实 施障碍消除项目(BRESL ) 建议 主要内容 国宏美亚(北京)工业节能减排技术促进中心 Center for Industrial Energy Efficiency (CIEE) 识别节能产品

304

Harmonization of CIM with IEC Standards  

Science Conference Proceedings (OSTI)

EPRI has sponsored development of a number of international standards that provide the basis for information exchange to support power system management. One of the most important is the Common Information Model (CIM), which is rapidly gaining acceptance throughout the world as a common semantic model to unify and integrate data from a myriad of systems involved in support of real-time electric utility operations. As its acceptance as the basis for information integration grows and areas of application e...

2006-03-31T23:59:59.000Z

305

Harmonic Air Motor - Lawrence Livermore National Laboratory  

Current Weather. Protocol Office. Where to stay. Tri-Valley Visitors Bureau. City of Livermore. Community. Our Community. Discovery Center. ... such ...

306

Harmonizing Global Metrics for Data Center Efficiency  

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

Example A: Data center with electric and natural gas (Co-generation) purchase o Cogeneration Input Fuel Assumption This taskforce has adopted the assumption that 67% of a...

307

The Sand Hills Biocomplexity Project  

E-Print Network (OSTI)

(St. Olaf, 2006) · Susan Frack (teacher) · Polla Hartley (teacher) · Grant Ferris (teacher) · Joshua

Nebraska-Lincoln, University of

308

Integrated Safety Management (ISM) Workshop - November 28-30...  

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

Crowley, BNL How to Read and "Right" a Causal Factors Report, Richard Hartley, BWXT Pantex A New Causal Factor Program to Support a High Reliability Organization, Richard...

309

Black, Brown and White Carbon  

Science Conference Proceedings (OSTI)

... JM; McIntosh, DM; Ramirez, SA; Hartley, S.; Hobbs, PV; Quinn, PK ... Based Aerosol Light Absorption Measurements Due to Organic Aerosol Loading ...

2011-03-16T23:59:59.000Z

310

Ultra-Deepwater Advisory Committee Members | Department of Energy  

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

Cooper* Professor University of California, Berkeley Dr. Quenton R. Dokken PresidentCEO Gulf of Mexico Foundation Dr. Hartley H. Downs Technology Fellow Baker Hughes Incorporated...

311

Harmon County, Oklahoma: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

5114°, -99.8124935° 5114°, -99.8124935° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":34.7305114,"lon":-99.8124935,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

312

D4, Second Harmonic Generation in a Metamaterial Resonating at ...  

Science Conference Proceedings (OSTI)

A pair of ultra wide band dipole antennas was used as a transmitter and a receiver. ... C2, Measurement of Nanoscale External Quantum Efficiency of Plastic Solar ... D1, Tuning of Plasmonic Cavity Resonances Using Atomic Layer Deposition.

313

Campbell Soup Company: Harmonizing Processes and Empowering Workers  

E-Print Network (OSTI)

In 2007 Campbell Soup Company was implementing Project Harmony: a multi-year effort to implement SAP and create more standardized and integrated business processes across

Ross, Jeanne W.

2008-06-01T23:59:59.000Z

314

Best Approximation in the Mean by Analytic and Harmonic Functions  

E-Print Network (OSTI)

* *ng the annihilator Ann (Hp) in Lq(T, d`)as Hq0= {f 2 Hq : f(0) = 0}, q = __p__pt-u1rns* * out is organized as follows. In Section 2we prove the exi* *stence of best approximations and characterize them

McCarthy, John E.

315

Harmonic approaches to non-intrusive load diagnostics  

E-Print Network (OSTI)

The Non-Intrusive Load Monitor (NILM) is a system that monitors, records and processes voltage and current measurements to establish the operating characteristics of individual loads on a load center from a single aggregate ...

Fuller, Ashley E. (Ashley Eliot)

2008-01-01T23:59:59.000Z

316

Premixed flame kinematics in a harmonically oscillating velocity field .  

E-Print Network (OSTI)

??Air pollution regulations have driven modern power generation systems to move from diffusion to premixed combustion. However, these premixed combustion systems are prone to combustion (more)

Shin, Dong-hyuk

2012-01-01T23:59:59.000Z

317

Effect of harmonic forcing on turbulent flame properties .  

E-Print Network (OSTI)

??Lean premixed combustors are highly susceptible to combustion instabilities, caused by the coupling between heat release fluctuations and combustor acoustics. In order to predict the (more)

Thumuluru, Sai Kumar

2010-01-01T23:59:59.000Z

318

GyroSole Harmonic Engine and Power System  

Current Weather. Protocol Office. Where to stay. Tri-Valley Visitors ... This differs from the typical solar power photovoltaic-conversion of heat ...

319

Spherical Harmonic Analysis of a Model-Generated Climatology  

Science Conference Proceedings (OSTI)

Monthly mean fields of 850 mb temperature (T850), 500 mb geopetential height (G500) and sea level pressure (SLP) were generated in the course of a 5-year climate simulation run with a global general circulation model. Both the model-generated ...

Zaphiris D. Christidis; Jerome Spar

1981-02-01T23:59:59.000Z

320

Flows and Decompositions of Games: Harmonic and Potential Games  

E-Print Network (OSTI)

142154, Washington, DC, USA, 2005. IEEE Computer Society. [15] G.H. Golub and C.F. Van Loan. Matrix computations. Johns Hopkins University Press, 1996.

Note: This page contains sample records for the topic "hartley harmon oldham" 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

NREL: Energy Analysis - Life Cycle Assessment Harmonization Methodolog...  

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

factors qualitatively evaluated for nuclear, including uranium ore grade, primary source energy mix and LCA method. 3 The specific system boundary varied by study. By reducing the...

322

Harmonizing Global Metrics for Data Center Energy Efficiency...  

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

expanded to provide measurement guidelines and next steps for three additional metrics; Green Energy Coefficient (GEC), Energy Reuse Factor (ERF), and Carbon Usage Effectiveness...

323

GyroSole Harmonic Engine and Power System  

This differs from the typical solar power photovoltaic-conversion of heat energy into electrical energy, ... (Residential Solar Thermal Power Plant), ...

324

Regulatory Harmonization and the Development of Private Equity Markets  

E-Print Network (OSTI)

ensure that the financial statements of all listed companiestheir consolidated financial statements. The Dutch went one

Cumming, Douglas; Johan, Sofia

2006-01-01T23:59:59.000Z

325

Temperature-insensitive phase-matched optical harmonic conversion crystal  

DOE Patents (OSTI)

Temperature-insensitive, phase-matched harmomic frequency conversion of laser light at a preferred wavelength of 1.064 microns can be achieved by use of a crystal of deuterated l-arginine phosphate. The crystal is cut and oriented so that the laser light propagates inside the crystal along one of several required directions, which correspond to a temperature-insensitive, phase-matching locus. The method of measuring and calculating the temperature-insensitive, phase-matching angles can be extended to other fundamental wavelengths and other crystal compositions.

Barker, Charles E. (Sunnyvale, CA); Eimerl, David (Livermore, CA); Velsko, Stephan P. (Livermore, CA); Roberts, David (Sagamore Hills, OH)

1993-01-01T23:59:59.000Z

326

GyroSol Harmonic Engine - Home - Energy Innovation Portal  

existing HVAC system Fuel efficiency ~ 90% Payback < 1 year . 19 GyroSol engine can save lives.

327

Harmonic launching of ion Bernstein waves via mode transformation  

DOE Green Energy (OSTI)

Ion Bernstein wave excitation and propagation via finite ion-Larmor-radium mode-transformation are investigated theoretically and experimentally. It is shown that in the ion cyclotron range of frequencies omega less than or equal to 4..cap omega../sub i/, with modest ion temperatures (T/sub i/ less than or equal to 10 eV), the finite-Larmor-radius effect removes the wave singularity at lower-hybrid resonance layer, enabling an externally initiated electron plasma wave to transform continuously into an ion Bernstein wave. In an ACT-1 hydrogen plasma (T/sub e/ approx. = 2.5 eV, T/sub i/ less than or equal to 2.0 eV), externally excited ion Bernstein waves have been observed for omega less than or equal to 2..cap omega../sub i/ as well as for omega less than or equal to 3..cap omega../sub i/. The finite ion-Larmor-radius mode transformation process resulting in strong ion Bernstein wave excitation has been experimentally verified. Detailed measurements of the wave dispersion relation and of the wave-packet trajectory show excellent agreement with theory. The dependence of the excited ion Bernstein wave on the antenna phasing, the plasma density, and on the neutral pressure (T/sub i/) is also investigated.

Ono, M.; Wong, K.L.; Wurden, G.A.

1982-06-01T23:59:59.000Z

328

Tidal flow over threedimensional topography generates outofforcingplane harmonics  

E-Print Network (OSTI)

energy conversion from the barotropic to the baroclinic tide. The generation of internal waves by tidal, a significant amount of the energy converted from barotropic to baroclinic tides can be generated perpendicular of a sphere, J. Fluid Mech., 183, 439­450. Baines, P. G. (2007), Internal tide generation by seamounts, Deep

Texas at Austin. University of

329

NREL: Energy Analysis - Life Cycle Assessment Harmonization Results...  

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

image Published Results The published life cycle greenhouse gas (GHG) estimates for hydropower, ocean, geothermal, biopower, solar (crystalline silicon photovoltaic, thin...

330

Harmonization of Energy Generation Life Cycle Assessments (LCA...  

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

6 kgmmBTU to 33 kgmmBTU and 45 gmmBTU to 65 gmmBTU for soybean biodiesel and corn grain ethanol, respectively. There is also no consistency between the magnitude of...

331

Wind LCA Harmonization (Fact Sheet), NREL (National Renewable...  

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

(30% for land-based and 40% for offshore systems). 2. Operating lifetime of the wind turbine and its components (20 years). 3. System boundary. 4. Global warming potentials...

332

Beam Conditioning and Harmonic Generation in Free Electron Lasers  

E-Print Network (OSTI)

Meth. A 429, 243 (1999). LCLS Design Study Group, ReportFELs) such as Euro- XFEL and LCLS are to be devices whichproposed at Euro-XFEL or the LCLS, are designed to generate

Charman, A.E.; Penn, G.; Wolski, A.; Wurtele, J.S.

2004-01-01T23:59:59.000Z

333

Novel Control and Harmonics Impact of PV Solar Farms.  

E-Print Network (OSTI)

??This thesis presents a novel application of Photovoltaic (PV) solar system inverter, both during night and day, as a dynamic reactive power compensator STATCOM. This (more)

Das, Byomakesh

2012-01-01T23:59:59.000Z

334

Predicting high harmonic ion cyclotron heating efficiency in Tokamak plasmas  

SciTech Connect

Observations of improved radio frequency (RF) heating efficiency in high-confinement (H-) mode plasmas on the National Spherical Tokamak Experiment (NSTX) are investigated by whole-device linear simulation. We present the first full-wave simulation to couple kinetic physics of the well confined core plasma to the poorly confined scrape-off plasma. The new simulation is used to scan the launched fast-wave spectrum and examine the steady-state electric wave field structure for experimental scenarios corresponding to both reduced, and improved RF heating efficiency. We find that launching toroidal wave-numbers that required for fast-wave propagation excites large amplitude (kVm 1 ) coaxial standing modes in the wave electric field between the confined plasma density pedestal and conducting vessel wall. Qualitative comparison with measurements of the stored plasma energy suggest these modes are a probable cause of degraded heating efficiency. Also, the H-mode density pedestal and fast-wave cutoff within the confined plasma allow for the excitation of whispering gallery type eigenmodes localised to the plasma edge.

Green, David L [ORNL; Jaeger, E. F. [XCEL; Berry, Lee A [ORNL; Chen, Guangye [ORNL; Ryan, Philip Michael [ORNL; Canik, John [ORNL

2011-01-01T23:59:59.000Z

335

Spherical harmonic analysis and synthesis for global multiresolution ...  

Science Conference Proceedings (OSTI)

noble identities which are illustrated using the Z transform as follows: ??? ! .... search Grant to the first author on Multiresolution Analysis of. Inverse Problems in

336

LIGHTS: Laboratory for Information Globalization and Harmonization Technologies and Studies  

E-Print Network (OSTI)

Three important trends - unrelenting globalization, growing worldwide electronic connectivity, and increasing knowledge intensity of economic activity - are creating new opportunities for global politics, with challenging ...

Choucri, Nazli

2004-03-05T23:59:59.000Z

337

Argonne Physics Division - ATLAS  

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

States Naval Academy hartley@usna.edu Mark Riley Florida State University mriley@physics.fsu.edu Alan Wuosmaa (chair) Western Michigan University alan.wuosmaa@wmich.edu The...

338

Reports on Workshop  

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

the Working Groups ATLAS Users Meeting August 8-9, 2009-09-16 Report of working group on Nuclear Structure - Focus on Physics Convenors: D. Hartley, P. Fallon and M.P. Carpenter...

339

Prorein Science (1997), 6:219&2202. Cambridge University Press. Printed in the USA. Copyright 0 1997 The Protein Society  

E-Print Network (OSTI)

by c = a + b.Tl12+ ACp,T112. (4) The transition curve hasbeen simulated by the following equation of the partial molar heat capacities of amino acid side-chains in proteins. Thermochim Acta. Forthcoming. Hartley

Udgaonkar, Jayant B.

340

Thursday  

Science Conference Proceedings (OSTI)

Mar 3, 2011 ... include creating greater flexibility in grid assets such as transformers by ...... Hartley, El Arroyo Enterprises; Philip Eisenlohr, Max-Planck Institut fuer .... Designing a Collaborative System for Socio-Environmental Management.

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


341

Monday Only - TMS  

Science Conference Proceedings (OSTI)

Mar 13, 2006 ... Hartley, El Arroyo Enterprises LLC. 8:30 AM ...... In this project, the effectiveness of the new data management tech- nique of data ...... production assets, ranging from mining, refining, smelting and downstream fabricating.

342

Energy Efficiency Standards and Labels in North America: Opportunities for Harmonization  

E-Print Network (OSTI)

Efficiency Labels and Standards: A Guidebook for Appliances,Labeling and Appliance Standards Program (CLASP). Availableof energy efficiency test standards and regulations in APEC

Wiel, Stephen

2008-01-01T23:59:59.000Z

343

BFlavor: A harmonized approach to media resource adaptation, inspired by MPEG-21 BSDL and XFlavor  

Science Conference Proceedings (OSTI)

During recent years, several tools have been developed that allow the automatic generation of XML descriptions containing information about the syntax of binary media resources. Such a bitstream syntax description (BSD) can then be transformed to reflect ... Keywords: BFlavor, Content adaptation, H.264/AVC, MPEG-21 BSDL, Multimedia, SEI messages, Sub-sequences, Temporal scalability, XFlavor

Wesley De Neve; Davy Van Deursen; Davy De Schrijver; Sam Lerouge; Koen De Wolf; Rik Van de Walle

2006-11-01T23:59:59.000Z

344

Two photon absorption and third harmonic generation micro- spectroscopy : hemoglobin and other compounds  

E-Print Network (OSTI)

Colored glass filters ( Corning UG-11) were used to blockand colored glass filters (Corning BG-39) were used to blockcolored glass filters (Corning UG-11) were used to block all

Clay, Gabriel Omar

2006-01-01T23:59:59.000Z

345

Progress in Large Period Multilayer Coatings for High Harmonic and Solar Applications  

E-Print Network (OSTI)

This work was supported by Director, Office of Science,Office of Basic Energy Sciences, Materials Sciences and

Aquila, Andrew

2008-01-01T23:59:59.000Z

346

Quasi-Harmonic Method For Studying Very Low Frequency Modes In Proteins  

E-Print Network (OSTI)

-energy function for the virtual-bond model is then expressed as 1 ~, K~(bi_b~)2+l_ .~_, Ki(Oi_Oio)2E(R) = ~ vi

347

MAGNETIC MEASUREMENT SYSTEM FOR HARMONIC ANALYSIS OF LBL SSC MODEL DIPOLES AND QUADRUPOLES  

E-Print Network (OSTI)

Office of High Energy and Nuclear Physics, High EnergyOffice of High Energy and Nuclear Physics, High Energy

Green, M.I.

2010-01-01T23:59:59.000Z

348

An Omniscient Scheduling Oracle for Systems with Harmonic Periods Alia Atlas and Azer Bestavros  

E-Print Network (OSTI)

, the characteristics of task solvers and providers as well as the process of offering jobs. Based on this analysis and limitations for companies applying Pico-Jobs. The article contributes a new concept for conducting open #12 and structured tasks which cannot be solved automatically that we call Pico-Jobs. In this paper a new method

Texas at Arlington, University of

349

Energy Efficiency Standards and Labels in North America: Opportunities for Harmonization  

E-Print Network (OSTI)

and Equipment Energy Efficiency Committee. Available fromE. McMahon. 2001. Energy-Efficiency Labels and Standards: ALloyd. 1999. Review of energy efficiency test standards and

Wiel, Stephen

2008-01-01T23:59:59.000Z

350

Abstract --The harmonic balance method is a frequency domain analysis technique for simulating the large signal  

E-Print Network (OSTI)

of the LO and RF, depending on the application. VCC VRF VLO VDC RL C Vout f LO f RF f IF f RF f LO­= f RF f

Dutton, Robert W.

351

Harmonization of Utility Common Information Model (CIM) with other IEC Power System Management Standards  

Science Conference Proceedings (OSTI)

EPRI has sponsored the development of a number of international standards which provide the basis for information exchange to support power system management. One of the most important is the Common Information Model (CIM), which is rapidly gaining acceptance throughout the world as a common semantic model to unify and integrate the data from a myriad of systems involved in support of real-time electric utility operations. As its acceptance as the basis for information integration grows and areas of appl...

2007-03-27T23:59:59.000Z

352

Does India need to harmonize the law of patent exhaustion and parallel imports?  

Science Conference Proceedings (OSTI)

The amendment of patent law of India in 2005 to fulfill her international obligation under the TRIPS Agreement (World Trade Organization Agreement on Trade Related Intellectual Property Rights) was an outcome of an attempt to balance the competing interests ... Keywords: TRIPS Agreement, exclusive rights exhaustion, national, parallel imports, regional and international exhaustion

Rajnish Kumar Rai

2010-06-01T23:59:59.000Z

353

Energy Efficiency Standards and Labels in North America: Opportunities for Harmonization  

E-Print Network (OSTI)

M xico Sello FIDE USA Energy Star & Green Seal Comparativelabel. Sello FIDE Energy Star Green Seal Manufacturersand applying the Energy Star logos. Green Seal Voluntary.

Wiel, Stephen

2008-01-01T23:59:59.000Z

354

A fast spherical harmonics transform for global NWP and climate models  

Science Conference Proceedings (OSTI)

Very high resolution spectral transform models are believed to become prohibitively expensive, due to the relative increase in computational cost of the Legendre transforms compared to the gridpoint computations. This article describes the ...

Nils P. Wedi; Mats Hamrud; George Mozdzynski

355

Reduced-Reference Video Quality Assessment using Discriminative Local Harmonic Strength with Motion Consideration  

E-Print Network (OSTI)

Gunawan,I.P. Ghanbari,M. Accepted for publication in the IEEE Trans. on Circuits and Systems for Video Technology IEEE

Gunawan, I.P.

356

Higher Fourier Harmonics of the Directional Distribution of an Equilibrium Wave Field under Steady Wind Forcing  

Science Conference Proceedings (OSTI)

Recently, directional wave spectra have been obtained by applying the two-dimensional fast Fourier transform (2D FFT) to the three-dimensional spatial topography of ocean surface waves collected by an airborne scanning laser ranging system during ...

David W. Wang; Paul A. Hwang

2003-01-01T23:59:59.000Z

357

A Dynamical Core with Double Fourier Series: Comparison with the Spherical Harmonics Method  

Science Conference Proceedings (OSTI)

A dynamical core of a general circulation model with the spectral method using double Fourier series (DFS) as basis functions is presented. The model uses the hydrostatic balance approximation and sigma coordinate system in the vertical direction ...

Hyeong-Bin Cheong

2006-04-01T23:59:59.000Z

358

Harmonization and Sharing of Data from International Fuel Cell Bus Demonstrations (Presentation)  

DOE Green Energy (OSTI)

This presentation, which was given by NREL's Leslie Eudy at the 2006 Fuel Cell Seminar, provides information on international fuel cell bus demonstrations.

Eudy, L.

2006-11-15T23:59:59.000Z

359

Harmonic control of multiple-stator induction machines for voltage regulation  

E-Print Network (OSTI)

Small, one to a few horsepower, three-phase induction machines with three sets of electrically-isolated, magnetically-coupled stator winding circuits are described. A voltage inverter is developed and used to drive one set ...

Holloway, Jack Wade, 1980-

2004-01-01T23:59:59.000Z

360

Efforts to Harmonize Gas Pipeline Operations with the Demands of the Electricity Sector  

Science Conference Proceedings (OSTI)

A possible future course of action is for pipelines to continue their efforts to provide new services with FERC approval. Over time, pipelines could satisfy power generators by giving them the flexibility and services they desire and for which they are willing to pay. Another possibility is that FERC will enact new rules governing regional electricity markets that would function similarly to nationwide business practices. (author)

Costello, Ken

2006-12-15T23:59:59.000Z

Note: This page contains sample records for the topic "hartley harmon oldham" 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

A Harmonic Approach for Calculating Daily Temperature Normals Constrained by Homogenized Monthly Temperature Normals  

Science Conference Proceedings (OSTI)

NOAA released the new 19812010 climate normals in July 2011. These included monthly and daily normals of minimum and maximum temperature. Monthly normals were computed from monthly temperature values that were corrected for biases (i.e., ...

Anthony Arguez; Scott Applequist

2013-07-01T23:59:59.000Z

362

A Fast Spherical Harmonics Transform for Global NWP and Climate Models  

Science Conference Proceedings (OSTI)

Very high-resolution spectral transform models are believed to become prohibitively expensive because of the relative increase in computational cost of the Legendre transforms compared to the gridpoint computations. This article describes the ...

Nils P. Wedi; Mats Hamrud; George Mozdzynski

2013-10-01T23:59:59.000Z

363

Ionization and absorption effects in high-order harmonic generation in gas-filled hollow fibers  

E-Print Network (OSTI)

, and dkq n ~u! qdKn ~u! being the phase-mismatch compo- nents due to the dispersion of the gas, waveguide! involved in Eq. ~10! depends not only on gas dispersion, but also on the dispersion of waveguide modes by the dispersion and absorption of a gas medium rather than by the parameters of the fiber itself. In other words

von der Linde, D.

364

Pressure control of phase matching in high-order harmonic generation in hollow fibers  

E-Print Network (OSTI)

can compensate for the phase mismatch that is due to gas dispersion, thus substantially improving to the dispersion of gas, waveguide, and electrons, respectively. Note that the first two components contribute)] involved in Eq. (15) de- pends not only on gas dispersion but also on dispersion of waveguide modes

von der Linde, D.

365

Joint estimation and correction of geometric distortions for EPI functional MRI using harmonic retrieval  

E-Print Network (OSTI)

Magnetic resonance imaging (MRI) uses applied spatial variations in the magnetic field to encode spatial position. Therefore, nonuniformities in the main magnetic field can cause image distortions. In order to correct the ...

Nguyen, Hien M.

366

Harmonizing the International Electrotechnical Commission Common Information Model (CIM) and 61850  

Science Conference Proceedings (OSTI)

The Electric Power Research Institute (EPRI) has sponsored the development of a number of international standards that provide the basis for information exchange to support power system management. One of the most important standards is the International Electrotechnical Commission (IEC) Common Information Model (CIM), which is rapidly gaining acceptance throughout the world as a common semantic model to unify and integrate the data from numerous systems involved in the support of real-time electric util...

2010-05-07T23:59:59.000Z

367

Adaptation of Classical Tidal Harmonic Analysis to Nonstationary Tides, with Application to River Tides  

Science Conference Proceedings (OSTI)

One of the most challenging areas in tidal analysis is the study of nonstationary signals with a tidal component, as they confront both current analysis methods and dynamical understanding. A new analysis tool has been developed, NS_TIDE, adapted ...

Pascal Matte; David A. Jay; Edward D. Zaron

2013-03-01T23:59:59.000Z

368

Estimating the Integrated Likelihood via Posterior Simulation Using the Harmonic Mean Identity  

E-Print Network (OSTI)

the situation where, roughly speaking, the level-w contour of the likelihood function has the form ^ +anwr S

Washington at Seattle, University of

369

Estimating the Integrated Likelihood via Posterior Simulation Using the Harmonic Mean Identity  

E-Print Network (OSTI)

of the likelihood function has the form ^ + anwr S, where ^ is the maximum likelihood estimator, r > 0 is a constant

Washington at Seattle, University of

370

Second Harmonic Generation and Confined Acoustic Phonons in Highly Excited Semiconductor Nanocrystals  

E-Print Network (OSTI)

spherical and the rod-shape CdSe nanocrystals. Figure 6. (dependence of the oscillation in CdSe nanocrystals. (B) Pumpamplitude in spherical CdSe nanocrystals. F.1 F.2 F.3 F.4

Son, Dong Hee; Wittenberg, Joshua S.; Banin, Uri; Alivisatos, A. Paul

2006-01-01T23:59:59.000Z

371

Achromatic phase-matching second harmonic generation for a tunable laser  

DOE Patents (OSTI)

An optical system uses a nonlinear optical medium to alter the frequency of a relatively narrow band light source tunable over a plurality of different frequencies using an optical system for passively directing light to the nonlinear medium at a correct phase matching angle. In this manner, the light from the tunable light source can be efficiently frequency-doubled or frequency-tripled without the need of moving parts. An all prism design provides a system of optimal efficiency. 6 figs.

Jacobson, A.G.; Bisson, S.; Trebino, R.

1998-01-20T23:59:59.000Z

372

Achromatic phase-matching second harmonic generation for a tunable laser  

DOE Patents (OSTI)

An optical system uses a nonlinear optical medium to alter the frequency of a relatively narrow band light source tunable over a plurality of different frequencies using an optical system for passively directing light to the nonlinear medium at a correct phase matching angle. In this manner, the light from the tunable light source can be efficiently frequency-doubled or frequency-tripled without the need of moving parts. An all prism design provides a system of optimal efficiency.

Jacobson, Alexander Gerson (Danville, CA); Bisson, Scott (Livermore, CA); Trebino, Rick (Livermore, CA)

1998-01-01T23:59:59.000Z

373

Energy Efficiency Standards and Labels in North America: Opportunities for Harmonization  

E-Print Network (OSTI)

L mc ,S m L ve ** ,S m Dishwashers L mc ,L ve ,S m L mc ,LClothes washers Clothes washers and dryers DishwashersDishwashers Fluorescent lamp ballasts Fluorescent lamp

Wiel, Stephen

2008-01-01T23:59:59.000Z

374

Energy Efficiency Standards and Labels in North America: Opportunities for Harmonization  

E-Print Network (OSTI)

annual running costs. USA Energy Guide Program: Energy (kWh/EnerGuide) Mxico USA (Energy Guide) Mandatory labels:

Wiel, Stephen

2008-01-01T23:59:59.000Z

375

FERMI @ Elettra -- A Seeded Harmonic Cascade FEL for EUV and Soft X-rays  

E-Print Network (OSTI)

laser systems for a FEL user facility, M.B Danailov, F. .will be the first user facility based on seeded harmonicsystem intended for a user facility that is operated on a

2005-01-01T23:59:59.000Z

376

An Enhanced GINGER Simulation Code with Harmonic Emission and HDF5 IO Capabilities  

E-Print Network (OSTI)

S. Reiche. I also thank the LCLS project of?ce at SLAC for ?1 (2004); see also http://www- ssrl.slac.stanford.edu/lcls/lcls tech notes.html/LCLS-TN- 04-3.pdf . [2] National Center

Fawley, William M.

2006-01-01T23:59:59.000Z

377

The Vector Harmonic Transform Method for Solving Partial Differential Equations in Spherical Geometry  

Science Conference Proceedings (OSTI)

The development of computational methods for solving partial differential equations in spherical geometry is complicated by problems induced by the spherical coordinate system itself. Even though the solution is smooth in Cartesian coordinates, ...

Paul N. Swarztrauber

1993-12-01T23:59:59.000Z

378

Quantum dephasing of a two-state system by a nonequilibrium harmonic oscillator  

Science Conference Proceedings (OSTI)

In this paper, we investigate coherent quantum dynamics in a nonequilibrium environment. We focus on a two-state quantum system strongly coupled to a single classical environmental oscillator, and explore the effect of nonstationary statistical properties of the oscillator on the quantum evolution. A simple nonequilibrium model, consisting of an oscillator with a well-defined initial phase which undergoes subsequent diffusion, is introduced and studied. Approximate but accurate analytic expressions for the evolution of the off-diagonal density matrix element of the quantum system are derived in the second-order cumulant approximation. The effect of the initial phase choice on the subsequent quantum evolution is quantified. It is observed that the initial phase can have a significant effect on the preservation of coherence on short time scales, suggesting this variable as a control parameter for optimizing coherence in many-body quantum systems.

Martens, Craig C. [Department of Chemistry, University of California, Irvine, California 92697-2025 (United States)

2013-07-14T23:59:59.000Z

379

Two-Dimensional Radiative Transfer in Cloudy Atmospheres: The Spherical Harmonic Spatial Grid Method  

Science Conference Proceedings (OSTI)

A new two-dimensional monochromatic method that computes the transfer of solar or thermal radiation through atmospheres with arbitrary optical properties is described. The model discretizes the radiative transfer equation by expanding the angular ...

K. Franklin Evans

1993-09-01T23:59:59.000Z

380

Simulation of High-Harmonic Fast-Wave Heating on the National Spherical Tokamak Experiment  

SciTech Connect

Images associated with radio-frequency heating of low-confinement mode plasmas in the National Spherical Tokamak Experiment, as calculated by computer simulation, are presented. The AORSA code has been extended to simulate the whole antenna-to-plasma heating system by including both the kinetic physics of the well-confined core plasma and a poorly confined scrape-off plasma and vacuum vessel structure. The images presented show the 3-D electric wave field amplitude for various antenna phasings. Visualization of the simulation results in 3-D makes clear that -30 degrees phasing excites kilo-volt per meter coaxial standing modes in the scrape-off plasma and shows magnetic-field-aligned whispering-gallery type modes localized to the plasma edge.

Green, David L [ORNL; Jaeger, Erwin Frederick [ORNL; Chen, Guangye [ORNL; Berry, Lee A [ORNL; Pugmire, Dave [ORNL; Canik, John [ORNL; Ryan, Philip Michael [ORNL

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hartley harmon oldham" 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

The effects of supply harmonics on the performance of compact fluorescent lamps  

SciTech Connect

This paper describes a performance evaluation of ten compact fluorescent lighting systems operated with sinusoidal and distorted voltage waveform conditions. The lamps were either provided with an electronic ballast, a magnetic core ballast or a magnetic core ballast with a power factor correction circuit. The test results show that the electrical performance of the compact fluorescent lamps for both sinusoidal and distorted voltage waveform operation is related to the different types of ballast used. The cost of operation of these compact fluorescent lamps was calculated and compared to the cost of a conventional 60 W incandescent lamp.

Arseneau, R.; Ouellette, M.

1993-04-01T23:59:59.000Z

382

Improving National and Homeland Security through a proposed Laboratory for Information Globalization and Harmonization Technologies (LIGHT)  

E-Print Network (OSTI)

A recent National Research Council study found that: "Although there are many private and public databases that contain information potentially relevant to counter terrorism programs, they lack the ...

Choucri, Nazli

2004-11-30T23:59:59.000Z

383

Improving National and Homeland Security through a proposed Laboratory for nformation Globalization and Harmonization Technologies (LIGHT)  

E-Print Network (OSTI)

A recent National Research Council study found that: "Although there are many private and public databases that contain information potentially relevant to counter terrorism programs, they lack the ...

Choucri, Nazli

2004-12-10T23:59:59.000Z

384

Comment on "Strongly interacting one-dimensional Bose-Einstein condensates in harmonic traps"  

E-Print Network (OSTI)

A recent paper of Tanatar and Erkan [Phys. Rev. A 62, 053601 (2000)] discusses a density functional approach to the impenetrable point Bose gas in one dimension and an equation for the order parameter of the system, due originally to Kolomeisky et al. [Phys. Rev. Lett. 85, 1146 (2000)], is derived. We comment on the regime of validity of such a model and on qualitative differences between predictions of the density functional approach and known exact results.

M. D. Girardeau; E. M. Wright

2000-10-27T23:59:59.000Z

385

Radial-fit bolts save millions  

Science Conference Proceedings (OSTI)

The Radial Fit Coupling Bolt, developed by Pilgrim International in Oldham, England, is a device for coupling turbine shafts. It has been available for more than six years, and has now completed a full outage cycle. Bolts removed during a routine service outage at two nuclear power stations were undamaged, and could not only be reused but each reinstalled in minutes. Several power stations in England and the US which installed radial fit coupling bolts to turbines five years ago are now finding dramatic savings in outage costs, through the greater ease of separation and reassembly of turbine shafts, and the reusability of the bolts. 2 figs.

Jeffs, E.

1995-09-01T23:59:59.000Z

386

Unsteady Analysis of a Counter-Rotating Aspirated Compressor Using Phase-Lag and Non-Linear Harmonic Methods.  

E-Print Network (OSTI)

??An analysis of the MIT counter-rotating aspirated compressor (CRAC) has been conducted using two different 3D viscid turbulent unsteady solvers. The Turbo phase-lag time accurate (more)

Knapke, Robert D.

2011-01-01T23:59:59.000Z

387

DESIGN, FABRICATION, AND CALIBRATION OF A CRYOGENIC SEARCH-COIL ARRAY FOR HARMONIC ANALYSIS OF OUADRUPOLE MAGNETS  

E-Print Network (OSTI)

Office of High Energy and Nuclear Physics, High EnergyOffice of High Energy and Nuclear Physics, High Energy

Green, M.I.

2010-01-01T23:59:59.000Z

388

A Direct Inverse Method for Inferring Open Boundary Conditions of a Finite-Element Linear Harmonic Ocean Circulation Model  

Science Conference Proceedings (OSTI)

A direct inverse method is presented for inferring numerical model open boundary conditions from interior observational data. The dynamical context of the method is the frequency-domain 3D linear shallow water equations. A set of weight matrices ...

Zhigang Xu

1998-12-01T23:59:59.000Z

389

Harmonic generation by reflecting internal waves Bruce Rodenborn, D. Kiefer, H. P. Zhang, and Harry L. Swinney  

E-Print Network (OSTI)

of internal waves," J. Fluid Mech. 390, 271 1999 . 17 P. Puig, A. Palanques, J. Guillen, and M. El Khatab

Texas at Austin. University of

390

DESIGN, FABRICATION, AND CALIBRATION OF A CRYOGENIC SEARCH-COIL ARRAY FOR HARMONIC ANALYSIS OF OUADRUPOLE MAGNETS  

E-Print Network (OSTI)

826fVersamid 140. Th. layup was weighted/clamped uniformlyrequired diameter. A dry layup vas made vith all the coils

Green, M.I.

2010-01-01T23:59:59.000Z

391

Real-Time Imaging of Two-Dimensional Cardiac Strain Using a Harmonic Phase Magnetic Resonance Imaging  

E-Print Network (OSTI)

myocardial func- tion during stress tests with free breathing. It was previously shown that standard tag-tracking

Atalar, Ergin

392

Characterization of Domain Ordering in Polymer and Dendrimer Thin Films Using Photoluminescence and Third Harmonic Generation (THG)  

E-Print Network (OSTI)

semiconductive polymers and dendrimeric materials for use in sensors, light emitting diodes, displays, and solar

Cohen, Ronald C.

393

Nanoscopic interchain aggregate domain formation in conjugated polymer films studied by third harmonic generation near-field  

E-Print Network (OSTI)

- emitting diodes LEDs ,1­4 photodiodes,5 photovoltaics,6 and large-area displays.7,8 The optimization polymers present many potential optoelec- tronic applications, including use in devices such as light

Cohen, Ronald C.

394

Performance study of a soft X-ray harmonic generation FEL seeded with an EUV laser pulse  

E-Print Network (OSTI)

28th International Free Electron Laser Conference (FEL06),26th International Free Electron Laser Conference (FEL04),on the Free Electron Laser Theory and Related Topics, World

Gullans, M.; Wurtele, J.S.; Penn, G.; Zholents, A.A.

2007-01-01T23:59:59.000Z

395

Physics Experiments and Abstract Harmonic Analysis: A Generalized Peano Kernel Theorem for Estimating Errors in Laser Interferometry  

SciTech Connect

This slide-show discusses the use of the Local Polynomial Approximation (LPA) to smooth signals from photonic Doppler velocimetry (PDV) applying a generalized Peano kernel theorem.

Luttman, A.

2012-10-08T23:59:59.000Z

396

Astrophysikalisches Institut Potsdam An der Sternwarte 16, D-14482 Potsdam  

E-Print Network (OSTI)

) 49. [18] Hartley R. R. and Behringer R. P., Nature, 421 (2003) 928; Howell D., Behringer R. P. and Veje C., Phys. Rev. Lett., 82 (1999) 5241; Miller B., O'Hern C. and Behringer R. P., Phys. Rev. Lett. and Scanlon T., Phys. Rev. Lett., 88 (2002) 178501. #12;1122 EUROPHYSICS LETTERS [3] Miltenberger P., Sornette

397

Europhys. Lett., 74 (6), pp. 11161122 (2006) DOI: 10.1209/epl/i2006-10048-2  

E-Print Network (OSTI)

) 49. [18] Hartley R. R. and Behringer R. P., Nature, 421 (2003) 928; Howell D., Behringer R. P. and Veje C., Phys. Rev. Lett., 82 (1999) 5241; Miller B., O'Hern C. and Behringer R. P., Phys. Rev. Lett. and Scanlon T., Phys. Rev. Lett., 88 (2002) 178501. #12;1122 EUROPHYSICS LETTERS [3] Miltenberger P., Sornette

Nori, Franco

398

Gift Planning Program 2009 Annual Report  

E-Print Network (OSTI)

. Shawver & Molly Shawver Jerry M. Smith & Lee Smith Mazzie Lane Steger & William E. Steger Barbara R.Whitehead Saundra Whitehead Jerry D.William Keith D.Wilner Elizabeth Hartley Winetroub Lorie Walker Worner & Rick. Roberts David L. Higdon, PhD Jack G. Hills, PhD H. Jerry Hodgden Herbert M. Hohn & Mary C. Hohn Kathryn A

Bou-Zeid, Elie

399

Tunable wavelength soft photoionization of ionic liquid vapors  

E-Print Network (OSTI)

high order harmonic generation source producing ultrafasthigh order harmonic generation light source. The combined PEorder harmonic generation EUV source, photoelectrons are

Strasser, Daniel

2010-01-01T23:59:59.000Z

400

IEEE IAS Annual Meeting, Oct. 6-10, 1996, San Diego, CA, pp. 2333-2339 Survey of Harmonics Measurements in Electrical Distribution Systems  

E-Print Network (OSTI)

be 1.0 [7]. Form Factor I I RMS _ = 1 (5) Symmetrical components is a mathematical tool used to analyze of several buildings in the three Department of Energy (DOE) Oak Ridge plants in Tennessee has yielded), variable frequency drives, switch mode power supplies, and uninterruptible power supplies. A discussion

Tolbert, Leon M.

Note: This page contains sample records for the topic "hartley harmon oldham" 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

Torsional Torques and Fatigue Life Expenditure for Large-Scale Steam Turbine-Generator Shafts and Blades Due to Power System Harmonics.  

E-Print Network (OSTI)

??During the three decades, the torsional impact on turbine-generator sets due to power system disturbances has been extensively discussed in many research works. However, most (more)

Tsai, Jong-ian

2004-01-01T23:59:59.000Z

402

Simple harmonic motion and wave motion T = 1 / f v = f vsound = 343 m/s (in air at 20 C)nv  

E-Print Network (OSTI)

/vmaterial 1 1 1 o if d d = + M = hi/ho = di/do Electricity and magnetism FE = k q1q2 / r 2 FB = qv?B = qv q / r 2 and V(r) = k q / r V = ­ / t =Blv (k = 1/4o where o = 8.854?10 ­12 C 2 /N·m 2 ) Electric phone charger); 12 V (car); 120 VAC (U.S. wall outlet) Resistor R Ohm () 144 (100 W, 120v bulb); 1 k

California at Santa Cruz, University of

403

Quantum-fluid-dynamics approach for strong-field processes: Application to the study of multiphoton ionization and high-order harmonic generation of He and Ne atoms  

E-Print Network (OSTI)

Wigner cor- relation energy functionals are used. QUANTUM-FLUID-DYNAMICS APPROACH FOR STRONGQuantum-fluid-dynamics approach for strong-field processes: Application to the study of multiphoton; published 18 March 2002 We explore the feasibility of extending the quantum-fluid dynamics QFD approach

Chu, Shih-I

404

Application of gradient-based optimization methods for a rotor system with static stress, natural frequency,and harmonic response constraints  

Science Conference Proceedings (OSTI)

This paper demonstrates the application of gradient-based optimization methods to the minimal weight design optimization of rotor systems. A nonlinear constrained optimization problem is considered. Design variables are inner radii and wall thicknesses ... Keywords: Gradient projection method, Rotordynamics, Sequential quadratic programming, Sizing optimization, Turbine rotor

Alexander O. Pugachev

2013-06-01T23:59:59.000Z

405

Response of the Separated Western Boundary Current to Harmonic and Stochastic Wind Stress Variations in a 1.5-Layer Ocean Model  

Science Conference Proceedings (OSTI)

A time-dependent version of the Parsons model (geostrophic 1.5-layer model of the ventilated thermocline) has been developed to investigate the response of the midlatitude ocean to wind stress variations in a simple configuration. In this model, ...

J. Sirven

2005-08-01T23:59:59.000Z

406

Reduction of uncertainty using sensitivity analysis methods for infinite random sets of indexable type  

Science Conference Proceedings (OSTI)

In this paper we deal with the question ''which is the best way to spend our resources in order to decrease the width of the interval [Bel(F),Pl(F)] in Dempster-Shafer evidence theory?''. A solution based on sensitivity analysis techniques using the ... Keywords: Dempster--Shafer evidence theory, Hartley-like measure of nonspecificity, Random sets, Reduction of uncertainty, Sensitivity analysis

Diego A. Alvarez

2009-05-01T23:59:59.000Z

407

Categorical Exclusion Determinations: Kentucky | Department of Energy  

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

April 11, 2011 April 11, 2011 CX-005602: Categorical Exclusion Determination Jet Drilling With Energized Fluids CX(s) Applied: B3.6, B3.7 Date: 04/11/2011 Location(s): Bowling Green, Kentucky Office(s): Fossil Energy, National Energy Technology Laboratory March 25, 2011 CX-005559: Categorical Exclusion Determination Heating, Ventilation, and Air Conditioning Efficiency and Replacement Project CX(s) Applied: B1.4, B2.2, B2.5, B5.1 Date: 03/25/2011 Location(s): Oldham County, Kentucky Office(s): Civilian Radioactive Waste Management, Energy Efficiency and Renewable Energy February 10, 2011 CX-005220: Categorical Exclusion Determination Kentucky Farm Energy Efficiency and Renewable Energy Partnership Market Title CX(s) Applied: B5.1 Date: 02/10/2011 Location(s): Goshen, Kentucky Office(s): Energy Efficiency and Renewable Energy, National Energy

408

Wildorado Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Wildorado Wind Farm Wildorado Wind Farm Jump to: navigation, search Name Wildorado Wind Farm Facility Wildorado Wind Ranch Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Edison Mission Group Developer Cielo Wind Power Energy Purchaser Xcel Energy Location Oldham TX Coordinates 35.302005°, -102.314005° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.302005,"lon":-102.314005,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

409

Step-by-Step Instructions  

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

Kentucky Kentucky based upon the simple prescriptive option of the 2012 IECC. It does not provide a guarantee for meeting the IECC. This guide is not designed to reflect the actual energy code, with amendments, if any, adopted in Kentucky and does not, therefore, provide a guarantee for meeting the state energy code. For details on the energy code adopted by Kentucky, including how it may differ from the IECC, please contact your local building code official. Additional copies of this guide are available on www.reca-codes.com. CLIMATE ZONE 4 Adair Edmonson Knox Nicholas Allen Elliott LaRue Ohio Anderson Estill Laurel Oldham Ballard Fayette Lawrence Owen Barren Fleming Lee Owsley Bath Floyd Leslie Pendleton Bell Franklin Letcher Perry Boone Fulton Lewis Pike

410

Pumping test and fluid sampling report, Mansfield No. 1 well, Palo Duro Basin: Report of the Geologic Project Manager, Permian Basin  

SciTech Connect

This report describes pumping test and fluid sampling activities performed at the Mansfield No. 1 well in Oldham County about 10 miles north of Vega, Texas. The well site was selected by TBEG and is located along the northern margin of the Palo Duro Basin in an area of active dissolution with the Permian salt sections. The objectives of the pumping test and fluid sampling program were to collect data to determine the hydrologic characteristics (formation pressure and permeability) of deep water bearing formations, and to obtain formation fluid samples for analyses (gas and fluid chemistry) in order to evaluate fluid migration and age relationships in the Permian Basin. 4 refs., 8 figs., 2 tabs.

Not Available

1983-07-01T23:59:59.000Z

411

Microsoft PowerPoint - Computational Studies of Physical Properties...  

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

based on DFT (VASP) Born-Oppenheimer approximation Harmonic model for vibrational free energy Quasi-harmonic approximation for first order anharmonicity Berry phase...

412

Publications 2002 - Nuclear Data Program - Nuclear Engineering Division  

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

2 2 Nuclear Data Program Overview Current Projects & Recent Activities Collaborating Organizations Publications [Publications 2011] [Publications 2010] [Publications 2009] [Publications 2008] [Publications 2007] [Publications 2006] [Publications 2005] [Publications 2004] [Publications 2003] [Publications 2002] [Publications 2001] [Publications 2000] [Publications 1999] [Publications 1998] [Publications 1997] [Other Publications] Nuclear Data Measurements (NDM) Reports Experimental Nuclear Data Resources Contact ND Program Related Resources Other Major Programs Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE Division on Flickr Nuclear Data Program Publications: 2002 References Bookmark and Share M. Danchev, D.J. Hartley, F.G. Kondev, M.P. Carpenter, R.V.F.

413

Image-based Visual Servoing Image-based Visual Servoing  

E-Print Network (OSTI)

With "standard" cameras Basics x IL IR CL CR xL xR eL eR CR RCL ,CR tCL E Hartley (2003) #12;Image-based VisualR eL eR CR RCL ,CR tCL E Coordinate transformation: CR x =CR RCL CL x +CR tCL Epipolar plane: (oCL , oCR , x) CR x CR tCL ?CR RCL CL x = 0 Projection (in camera coordinates!) Ci x = fi Ci z Ci x with i {L

Moeller, Ralf

414

Liver and brain abscess caused by Aggregatibacter paraphrophilus in association with a large patent foramen ovale: a case report  

E-Print Network (OSTI)

of the liver measuring 49 mm and 40 mm in diameter. Metastatic tumor was suspected. The fever of our patient continued, and on the third day, he developed a severe headache with persistent vomiting. Fundoscopy was normal. Computer tomogra- phy (CT) scanning... , Hartley JC: Development of broad range 16S rDNA PCR for use in the routine clinical microbiology service. J Med Microbiol 2003, 52:685-691. 5. Haight DO, Toney JF, Greene JN, Sandin RL, Vincent AL: Liver abscess following blunt trauma: a case report...

Ariyaratnam, Shaumya; Gajendragadkar, Parag R; Dickinson, Richard J; Roberts, Phil; Harris, Kathryn; Carmichael, Andrew; Karas, Johannis A

2010-02-24T23:59:59.000Z

415

R e n e w a b l e E n e r g y  

E-Print Network (OSTI)

surveillance of power systems. His research interests include minimization of harmonics in HVDC converters

416

Smart Grid Priority Actions  

Science Conference Proceedings (OSTI)

... Precision Time Synchronization. 14. Transmission and Distribution Power Systems Model Mapping. 15. Harmonize Power Line ...

2012-05-27T23:59:59.000Z

417

ACS Symposium Series: Green Chemistry and Engineering with Gas Expanded Liquids and Near Critical Media (2008)  

E-Print Network (OSTI)

, electrical interactions described in eq 1 were treated using the Kubic harmonic Ewald approximation (37

Maroncelli, Mark

418

This document is a preprint of the final paper: Savaghebi, M.; Vasquez, J.C.; Jalilian, A.; Guerrero, J.M.; Tzung-Lin Lee; , "Selective harmonic virtual impedance for voltage source inverters with LCL filter in microgrids," Energy Conversion  

E-Print Network (OSTI)

with LCL filter in microgrids," Energy Conversion Congress and Exposition (ECCE), 2012 IEEE , vol., no., pp in Microgrids Mehdi Savaghebi1 , Juan C. Vasquez2 , Alireza Jalilian1 , Josep M. Guerrero2 , and Tzung-Lin Lee3 source inverters ended with LCL filters for microgrid applications. The control approach consists

Vasquez, Juan Carlos

419

UNDER CONTRACT DE-AC02-76CH03073 PPPL-3564 UC-70 PPPL-3564 Profile Modifications Resulting From Early High-Harmonic Fast Wave Heating in NSTX  

E-Print Network (OSTI)

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

J. E. Menard; B. P. Leblanc; J. R. Wilson; S. A. Sabbagh; D. Stutman; D. W. Swain

2001-01-01T23:59:59.000Z

420

MESSAGE: WIA W/O CLOSING REF CLOSING REF  

Office of Legacy Management (LM)

MESSAGE: MESSAGE: WIA W/O CLOSING REF CLOSING REF _ CONSTRUCTION COMPL DATE J. King SAIC J. Waddell SAIC R. Wright SAIC T. Gangwer SAIC M. Khan SAIC T. Patterson SAIC R. Tucker SAIC C.Helie SAIC K. Renfro SAIC S. Heptinstall SAIC PLEASE RETURN TO PDCC FOR CORRECTIONS MGMT. SYSTEMS: PROGRAM ADMIN.: DEPUTY PROGRAM MGR: PROJECT MANAGER: () I PROGRAM MANAGER: I I ANL: AJ. Dvorak ANL A Geisler ANL G. Maraman ANL D. Dunning ANL J. Wing BNI DIRECTOR. FSRD: L Price FSRD DEP. DIRECTOR. FSRD: W.Seay FSRD SITE MANAGER: D.Adler FSRD " S. Cange FSRD R. Kirk FSRD J. Kopotic FSRD M. Nee FSRD PROJECT SUPPORT GRP: J.Hart FSRD S. Oldham FSRD 4- G. Hartman FSRD L Marz FSRD PRGM ANALYST: B. Hughlett FSRD SECRETARY: M. Seiber"''' Dyke FSRD FSRD CHRON FILE FSRD NOTEBOOKS READING FILE DOEIP&CD: French/Sistrunk DCO DOEIHO: J. Wagoner DHO RESeDNSE TRACKING INFORMATION SECONDARY: / : SECONDARY: ~ OWED TO: / lOWED

Note: This page contains sample records for the topic "hartley harmon oldham" 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

Copyright 1996 Psychonomic Society, Inc. 704 This paper examines the contribution of different har-  

E-Print Network (OSTI)

or 4 harmonics apart, Houtsma (1979) found that performance depended greatly on the harmonic number transformation (Wightman, 1973) models. Inspection of the data indicated that peaks in performance occurred when

Trainor, Laurel J.

422

Representation of Topography in Spectral Climate Models and Its Effect on Simulated Precipitation  

Science Conference Proceedings (OSTI)

Spectral climate models are distinguished by their representation of variables as finite sums of spherical harmonics, with coefficients computed by an orthogonal projection of the variables onto the spherical harmonics. Representing the surface ...

Craig Lindberg; Anthony J. Broccoli

1996-11-01T23:59:59.000Z

423

Wireless Systems Metrology  

Science Conference Proceedings (OSTI)

... exhibit nonlinear behavior that includes harmonic generation and intermodulation ... interpreting nonlinear measurements, such as power and wave ...

2010-10-05T23:59:59.000Z

424

Nonlinear ac response of anisotropic composites J. P. Huang, Jones T. K. Wan, C. K. Lo, and K. W. Yu  

E-Print Network (OSTI)

the harmonics of the induced dipole moment and the eletric field: the perturbation expansion method PEM 11

Huang, Ji-Ping

425

Transverse Periodic Beam Loading Effects in a Storage Ring  

E-Print Network (OSTI)

and for third generation light sources with harmonic RFresem- bling a third generation light source shown in Table

Thompson, J.R.

2010-01-01T23:59:59.000Z

426

A 2-Site Model for Simulating Supercritical Fluoroform W. Song, N. Patel, and M. Maroncelli*  

E-Print Network (OSTI)

applied and long-range interactions treated using a 10th order Kubic harmonic approximation to the Ewald

Maroncelli, Mark

427

The Alloy-Theoretic Automated Toolkit (ATAT): A User Guide Axel van de Walle  

E-Print Network (OSTI)

. An alternate expansion in terms of Kubic harmonics15 composed only of combinations of the allowed Ylm would

van de Walle, Axel

428

VOLUME 78, NUMBER 25 P H Y S I C A L R E V I E W L E T T E R S 23 JUNE 1997 Charge Density of MgO: Implications of Precise New Measurements for Theory  

E-Print Network (OSTI)

in the crystal charge density. We consider only the l 4 Kubic harmonic term (the lowest nonzero term

Zuo, Jian-Min "Jim"

429

Impact of Nonlinear Loads on Motor Generator Sets  

Science Conference Proceedings (OSTI)

Using backup generators with loads that create high harmonics can cause power quality problems. This report describes how to calculate voltage distortion based on the different impedance characteristics of a generator and the harmonic current characteristics of loads and discusses options for reducing the harmonics and mitigating their impact.

2001-10-29T23:59:59.000Z

430

J. Phys.: Condens. Matter 9 (1997) 75417561. Printed in the UK PII: S0953-8984(97)83633-8 The theoretical charge density of silicon: experimental  

E-Print Network (OSTI)

of the Kubic harmonics: F(h, k, l) 8 cos {fc + c,4 - fa,3 tan } exp(-Bs2 ) (5) with non-spherical terms-order Kubic harmonic parts of the generalized `atomic' scattering factor of silicon, respectively. Again-shell scaling and the model parameters for the third- order Kubic harmonics terms are found to be very similar

Zuo, Jian-Min "Jim"

431

Two-dimensional time dependent Riemann solvers for neutron transport  

Science Conference Proceedings (OSTI)

A two-dimensional Riemann solver is developed for the spherical harmonics approximation to the time dependent neutron transport equation. The eigenstructure of the resulting equations is explored, giving insight into both the spherical harmonics approximation ... Keywords: Riemann solvers, finite methods, radiative transfer, spherical harmonics, time dependent transport

Thomas A. Brunner; James Paul Holloway

2005-11-01T23:59:59.000Z

432

7:44 a  

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

March 8, 2012 Nineteenth Meeting Conference Call Minutes 1 Ultra-Deepwater Advisory Committee (UDAC) Teleconference, March 8, 2012 At 1:00 p.m., the Committee Chair, Daniel Daulton, called the meeting to order and welcomed all the members. Ms. Elena Melchert, who was appointed Acting Designated Federal Officer (DFO) (Attachment 1), called the roll of the members. Committee members in attendance were: George Cooper, Daniel Daulton, Doug Foster, Luc Ikelle, James Litton, Stephen Pye, Nagan Srinivasan, Mary Jane Wilson, and Lesli Wood. Absent from the meeting were: Elmer Danenberger, Quenton Dokken, Hartley Downs, and William New. Nine members were present, exceeding the minimum of seven members required for a quorum. Attending the meeting in Washington, D.C. was: Elena Melchert, Acting DFO, Trudy Transtrum

433

The ALE/GAGE/AGAGE Network (DB1001)  

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

Atmospheric Trace Gases » ALE/GAGE/AGAGE Network Atmospheric Trace Gases » ALE/GAGE/AGAGE Network The ALE / GAGE / AGAGE Network (DB1001) DOI: 10.3334/CDIAC/atg.db1001 Links to Additional Sources Advanced Global Atmospheric Gases Experiment (AGAGE) home page How halocarbons (CFCs, HFCs, HCFCs, and halons) are named CDIAC data base including some of the same compounds, and a tabulation of their uses and atmospheric lifetimes Investigators R.G. Prinn, R.F. Weiss, P.J. Fraser, P.G. Simmonds, S. O'Doherty, P. Salameh, L. Porter, P. Krummel, R.H.J. Wang, B. Miller, C. Harth, B. Greally, F.A. Van Woy, L.P. Steele, J. Müehle, G. Sturrock, F.N. Alyea, J. Huang, and D.E. Hartley Description In the ALE/GAGE/AGAGE global network program, continuous high frequency gas chromatographic measurements of four biogenic/anthropogenic gases (methane,

434

Integrated Safety Management (ISM) Workshop - November 28-30, 2007  

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

D - Developing Effective Safety Culture D - Developing Effective Safety Culture ISM Workshop Presentations November 28-30, 2007 Wednesday, November 28, 2007 11:00 - 12:30 Tank S-102 Waste Spill, Shirley Olinger, ORP and Jerry Long, CH2MHill Practices in Implementing Human Performance Initiative, Bill Hartley, BWXT Pantex 2:00 - 3:30 Safety Observation to Support Human Performance Improvement, Chris Contwell, Todd Conklin and John Tseng, LANL Human Performance Training and Job Aid for Nuclear Materials Applications, William Brown, BNL Developing Effective Safety Cultures, Dr. Isabel Perry 4:00 - 5:30 Commercial Nuclear Industry Progress on Safety Culture (Sensitive Material - Contact Presenter Directly), George Mortensen, INPO Communication with the Dead is only Slightly Harder than talking with an Engineer, William Rigot, WSRC

435

7:44 a  

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

April 19, 2011 Sixteenth Meeting Conference Call Minutes 1 Ultra-Deepwater Advisory Committee (UDAC) Meeting Teleconference, April 19, 2011 At 11:00 a.m., the Committee Chair, Daniel Daulton, called the meeting to order and welcomed all the members and thanked them for their participation. Ms. Elena Melchert, who was appointed Acting Designated Federal Officer (DFO) (Attachment 1), called the roll of the members. Committee members in attendance were: George Cooper, Daniel Daulton, Quenton Dokken, Hartley Downs, Douglas Foster, Luc Ikelle, James Litton, William New, Stephen Pye, Nagan Srinivasan, and Mary Jane Wilson. Absent from the meeting were: Elmer Danenberger, Lars Havardsholm, and Lesli Wood. Eleven members were present, exceeding the minimum of

436

CURRICULUM VITAE  

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

SUNSET COMMITTEE FINDINGS AND RECOMMENDATIONS SUNSET COMMITTEE FINDINGS AND RECOMMENDATIONS Subcommittee members George Cooper, Chair Hartley Downs, Mary Jane Wilson, Leslie Wood Overview The research program designated under the Department of Energy Section 999 is to end on the 30th of September 2014. At present, it is understood that ongoing projects that have funding already allocated, will continue to be funded with the projects and funding to be administrated by the National Energy Technology Laboratory (NETL). The task of the Sunset Subcommittee has thus been to review the activities of the projects completed so far or ongoing, and to look towards the further continuation of the work as the program comes to its end. An important aspect of the termination of any research

437

Acoustic waves in the atmosphere and ground generated by volcanic activity  

SciTech Connect

This paper reports an interesting sequence of harmonic tremor observed in the 2011 eruption of Shinmoe-dake volcano, southern Japan. The main eruptive activity started with ashcloud forming explosive eruptions, followed by lava effusion. Harmonic tremor was transmitted into the ground and observed as seismic waves at the last stage of the effusive eruption. The tremor observed at this stage had unclear and fluctuating harmonic modes. In the atmosphere, on the other hand, many impulsive acoustic waves indicating small surface explosions were observed. When the effusion stopped and the erupted lava began explosive degassing, harmonic tremor started to be transmitted also to the atmosphere and observed as acoustic waves. Then the harmonic modes became clearer and more stable. This sequence of harmonic tremor is interpreted as a process in which volcanic degassing generates an open connection between the volcanic conduit and the atmosphere. In order to test this hypothesis, a laboratory experiment was performed and the essential features were successfully reproduced.

Ichihara, Mie; Lyons, John; Oikawa, Jun; Takeo, Minoru [Earthquake Research Institute, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032 (Japan); Instituto Geofisico, Escuela Politecnica Nacional, Ladron de Guevara E11-253, Aptdo 2759, Quito (Ecuador); Earthquake Research Institute, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032 (Japan)

2012-09-04T23:59:59.000Z

438

NREL: Energy Analysis - Wind Power Results - Life Cycle Assessment  

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

Wind LCA Harmonization (Fact Sheet) Wind LCA Harmonization (Fact Sheet) Cover of the LWind LCA Harmonization Fact Sheet Download the Fact Sheet Wind Power Results - Life Cycle Assessment Harmonization To better understand the state of knowledge of greenhouse gas (GHG) emissions from utility-scale wind power systems, NREL developed and applied a systematic approach to review life cycle assessment literature, identify sources of variability and, where possible, reduce variability in GHG emissions estimates through a meta-analytical process called "harmonization." Over the last 30 years, several hundred life cycle assessments have been conducted for wind power technologies with wide-ranging results. Harmonization for onshore and offshore wind power systems was performed by adjusting published greenhouse gas estimates to achieve:

439

Magnetically Controlled Reactor Shrinks Power Quality Costs and...  

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

ensures less than 2-3% main harmonic distortion even without special filters. Transformer-like construction ensures reliable operation. MCR's increase power quality through...

440

Method and apparatus for sensorless operation of brushless ...  

A sensorless method and apparatus for providing commutation timing signals for a brushless permanent magnet motor extracts the third harmonic back-emf of a three ...

Note: This page contains sample records for the topic "hartley harmon oldham" 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

Publications Portal  

Science Conference Proceedings (OSTI)

... Remijan Abstract: The microwave spectrum of the ... on bis-(2-hydroxyphenyl) methane (2HDPM) in ... both the harmonic and Vibrational Self-consistent ...

2013-12-19T23:59:59.000Z

442

Substation automation gains momentum with modern options  

SciTech Connect

This paper discusses issues associated with utility substation automation. Monitoring equipment for monitoring power flow, quality, and harmonics for three substations simultaneously is described.

Beaty, W.

1996-12-01T23:59:59.000Z

443

Nanograting-based compact vacuum ultraviolet spectrometer and ...  

Nanograting-based compact vacuum ultraviolet spectrometer and beam pro?ler for in situ characterization of high-order harmonic generation light sources

444

REPORT OF THE STORAGE RING DESIGN GROUP  

E-Print Network (OSTI)

his the RF harmonic number. VRF the peak RF vol tage. l'Ssturn as 1 million volts: VRf We took the ring in race track

Peterson, J.M.

2008-01-01T23:59:59.000Z

445

Density-functional theory study of the initial oxygen incorporation in Pd(111) Mira Todorova, Karsten Reuter, and Matthias Scheffler  

E-Print Network (OSTI)

) and Potential (pot), Cut-off for the Spherical Harmonics Representation, and the Muffin-Tin Radii Ewf 16 Ry Epot

446

International Hydrogen Fuel and Pressure Vessel Forum 2010 Proceedings  

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

challenges in harmonizing test protocols and requirements for compressed natural gas (CNG), hydrogen, and CNG-hydrogen (HCNG) blend pressure vessels and to define next steps for...

447

SUMMARY OF NIST PRECISION MEASUREMENT GRANTS  

Science Conference Proceedings (OSTI)

... of the Lamb shift in H, n = 2, by the Ram- sey method ... Quantum-mechanical analysis of high-precision measure- ments on harmonic oscillators ...

2013-12-05T23:59:59.000Z

448

Laser Phase Errors in Seeded Free Electron Lasers  

SciTech Connect

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

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

2012-04-17T23:59:59.000Z

449

Table 10.4 Biodiesel Overview, 2001-2011 - U.S. Energy Information ...  

U.S. Energy Information Administration (EIA)

Electricity. Sales, revenue and prices, power plants, fuel use, stocks, ... imports data for Harmonized Tariff Schedule codes 3824.90.40.20, "Fatty Esters

450

OP - SFNET - Volume 20, Number 3 May 15, 2013  

Science Conference Proceedings (OSTI)

... The answers to the questions below indicate ... as the very recent NIST Handbook of Mathematical ... abs/1304.2904 On fundamental harmonic analysis ...

2013-05-16T23:59:59.000Z

451

Sustainability Standards Portal  

Science Conference Proceedings (OSTI)

... links to the original standard/ directive developer website ... for harmonizing standards and directives (future work ... for information only; it does not imply ...

452

OP - SFNET - Volume 20, Number 5 September 15, 2013  

Science Conference Proceedings (OSTI)

... theory, from asymptotics to zero distribution, and on minimum energy problems on ... of Multiple Harmonic Sum and Multiple Zeta Star Value Identities ...

2013-09-16T23:59:59.000Z

453

NREL: Energy Analysis - Coal-Fired Electricity Generation Results...  

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

Coal-Fired Electricity Generation Results - Life Cycle Assessment Harmonization Over the last 30 years, researchers have conducted hundreds of life cycle assessments of...

454

Hydro-Quebec Sustainable Development Action Plan 2009-2013 (Quebec...  

Open Energy Info (EERE)

management and infrastructure projects are already imbued with a culture of sustainability. Nevertheless, as the action plan indicates, Hydro-Qubec plans to harmonize...

455

Transportation Licenses Available | Tech Transfer | ORNL  

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

to WIM to permanently anchor to pavement 200902230 Electrical MotorGenerator Drive with Improved Inverter 200902267 Third Harmonics Torque through Two or Four-Phase...

456

One-shot free energy calculations for crystalline materials.  

E-Print Network (OSTI)

??Current methods for free energy calculations in materials science are either computationally expensive, as lambda-integration, or based on the harmonic approximation and thus only applicable (more)

Andersson, Tommy

2012-01-01T23:59:59.000Z

457

Development of Measurements and Standards for Biofuels  

Science Conference Proceedings (OSTI)

... have worked with biofuel experts from the US, EU, and Brazil, the world's major producers of biofuels, to harmonize biofuel specifications among ...

2013-02-11T23:59:59.000Z

458

Controller Design of Power Quality-Improving Appliances  

SciTech Connect

This paper presents an innovative solution to power quality problems -- using power quality improving (PQI) appliances to reduce harmonic currents and improve the power factor in buildings.

Hammerstrom, Donald J.; Zhou, Ning; Lu, Ning

2007-01-01T23:59:59.000Z

459

A Generalized Inverter Control Method for a Variable Speed Wind Power System Under Unbalanced Operting Conditions.  

E-Print Network (OSTI)

??This thesis presents a generalized control method for complete harmonic elimination and adjustable power factor of a grid side inverter under unbalanced operating conditions used (more)

Wu, Shuang

2010-01-01T23:59:59.000Z

460

Three-dimensional shape analysis of coarse aggregates ...  

Science Conference Proceedings (OSTI)

... particle volume (V), which can both be computed from the spherical harmonic analysis [1]. Figure 6 shows these plots for the granite (GR) and ...

2005-06-06T23:59:59.000Z

Note: This page contains sample records for the topic "hartley harmon oldham" 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

Laser Phase Errors in Seeded FELs  

Science Conference Proceedings (OSTI)

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

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

2012-03-28T23:59:59.000Z

462

High Temperature Corrosion  

Science Conference Proceedings (OSTI)

Oct 18, 2010 ... Protective Coatings for Corrosion Resistance at High Temperatures: Vilupanur Ravi1; Thuan Nguyen1; Alexander Ly1; Kameron Harmon1;...

463

Report on RFI DE-FOA-000753: High-Accuracy Hydrogen Meters  

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

Science Advisor, Science and Technology Directorate, Savannah River National Lab; Nha Nguyen Senior Engineer Advisor, Office of International Policy and Harmonization, National...

464

Energy saving controller for fluorescent lamps.  

E-Print Network (OSTI)

??Although fluorescent lamp is a very efficient lighting device in daily life, still the high harmonic distortion and low power factor cause unnecessary energy consumption. (more)

Cheong, Zhi Xiong

2010-01-01T23:59:59.000Z

465

Implementation of a novel control strategy for shunt active filter  

Science Conference Proceedings (OSTI)

Use of nonlinear loads, such as thyristor controlled inductors for FACTs devices, converters for HVDC transmission and large adjustable speed motor drives, is expected to grow rapidly. All of these loads inject harmonic currents and reactive power into ... Keywords: harmonic compensation, lab view soft ware, power factor correction, shunt active filter

M. Ghandchi; A. Ajami

2005-10-01T23:59:59.000Z

466

HVDC Control Strategies to Improve Transient Stability in Interconnected Power Systems  

E-Print Network (OSTI)

PHEV's Park as a Virtual Active Filter for HVDC Networks F. R. Islam, H. R. Pota and A. B. M.Nasiruzzaman@student.adfa.edu.au Abstract--The HVDC converters used for rectifying or in- verting operations absorb reactive power from produces harmonics in both sides of HVDC links. Passive and active filters are used to filter the harmonics

Paris-Sud XI, Université de

467

Fuel Oil Prepared by Blending Heavy Oil and Coal Tar  

Science Conference Proceedings (OSTI)

The effect of temperature, harmonic ration, surfactant and shearing to fuel oil prepared by blending heavy oil and coal tar were detailedly studied. The results show that the viscosity of the blended oil increases gradually with the increase of harmonic ... Keywords: coal tar, heavy oil, blending, surfactant

Guojie Zhang; Xiaojie Guo; Bo Tian; Yaling Sun; Yongfa Zhang

2009-10-01T23:59:59.000Z

468

Theoretical Investigation of Optical Fiber-Length-Dependent Phase Noise in  

E-Print Network (OSTI)

: The detected RF signal from the beating of optical harmonics: VRF(t) = R m=- am(L, t)a m-1(L, t) exp(j0t(z) ] Phase differences between harmonics reduce the detected signal: = 1(L) + -1(L) 2 - 0(L) VRF(t) = exp

Maryland, Baltimore County, University of

469

Diurnal Variation of Pressure-Heights: A Vertical Phase Shift  

Science Conference Proceedings (OSTI)

A vertical phase shift of the diurnal harmonic of geopotential height S1(Z) in the lower troposphere of low latitudes is shown by a comparison of diurnal harmonic of surface pressure at two surface stations that have an elevation difference close ...

Tsing-Chang Chen; Ming-Cheng Yen; Siegfried Schubert

2001-09-01T23:59:59.000Z

470

Study about the possibility of flicker effect simulation caused by nonlinear power loads  

Science Conference Proceedings (OSTI)

The Electric Arc Furnace (EAF) is a very large power load, determining the negative effects on the power quality: flicker effect, harmonics currents, unbalanced load, and reactive power. These negative effects are due to the nonlinear characteristic ... Keywords: flicker, harmonics, interharmonics, power quality, simulation and modeling

Manuela Panoiu; Caius Panoiu; Ioan Sora; Raluca Rob

2008-08-01T23:59:59.000Z

471

Simulation of the flicker phenomenon based on modeling the electric arc  

Science Conference Proceedings (OSTI)

The Electric Arc Furnace (EAF) is a very large power load, determining the negative effects on the power quality like flicker effect, harmonics currents, and reactive power. These effects are due to the nonlinear characteristic of the electric arc. In ... Keywords: flicker, harmonics, interharmonics, power quality, simulation and modeling

Manuela Panoiu; Caius Panoiu; Ioan Sora; Raluca Rob

2008-10-01T23:59:59.000Z

472

Simultaneous phase matching and internal interference of two second-order nonlinear  

E-Print Network (OSTI)

extraordinary fundamental waves generate an extraordinary second- harmonic wave) and Type I (two ordinary fundamental waves generate an extraordinary second-harmonic wave) parametric interactions. The phase- matching. Gurzadian, V. G. Dmitriev, and D. N. Nikogosian, "Handbook of Nonlinear Optical Crystals," 3rd ed., Vol. 64

473

Achieving a World-Wide Software Engineering Profession: A Report on the CSEET 2001 Workshop  

Science Conference Proceedings (OSTI)

The prime aim of the workshop was to provide a forum to consider the global dimensions of a Software Engineering profession and determine the relevance and usefulness of an initiative concerning the harmonization of professional standards which had been ... Keywords: IFIP, global level, harmonization, professionalism, software engineering

J. Barrie Thompson; Helen M. Edwards

2001-12-01T23:59:59.000Z

474

IEEE TRANSACTIONS ON PLASMA SCIENCE, VOL. 30, NO. 3, JUNE 2002 1063 The Multifrequency Spectral Eulerian (MUSE)  

E-Print Network (OSTI)

microwave vacuum electronics, plasma physics, fluid dynamics, dynam- ical systems, and applied math. John H with a small number of input frequencies, including studies of harmonic generation and harmonic injection] to match Christine 1-D results. B. Constant of the Motion Appendix I shows that the total energy density

Dobson, Ian

475

Life Cycle Greenhouse Gas Emissions from Electricity Generation (Fact Sheet)  

SciTech Connect

Analysts at NREL have developed and applied a systematic approach to review the LCA literature, identify primary sources of variability and, where possible, reduce variability in GHG emissions estimates through a procedure called 'harmonization.' Harmonization of the literature provides increased precision and helps clarify the impacts of specific electricity generation choices, producing more robust results.

Not Available

2013-01-01T23:59:59.000Z

476

Evaluation tests of Abacus 6 kVA utility-interactive inverter  

SciTech Connect

The voltage pattern spectra were analyzed for 100% and 50% pattern ratios and harmonics analyses are provided for the Abacus inverter. The harmonics are compared with those calculated for a simple model with no agreement. AC waveforms and inverter current spectra are given as well as basic electrical data. (LEW)

Landsman, E.E.

1981-08-01T23:59:59.000Z

477

PHYSICAL PROPERTIES OF METALS AND NON-MAGNETIC ALLOYS --The band theory approach for actinides (*)  

E-Print Network (OSTI)

.05 eV changes in the dispersion of the band structure. Figure 3 shows the Kubic harmonic decomposition with scale at left) and L = 4 (chain-dot) and L = 6 (chain-dash) Kubic harmonic components (scale at right

Paris-Sud XI, Université de

478

THE MECHANISM OF PHASE TRANSFORMATIONS  

E-Print Network (OSTI)

of the rm: 1/2 (24b) where n, ,n,,,n,,are the powers of x, y, and z, respec- tively, in the Kubic harmonics) for the atomic orbitals. Kubic harmonics up to 1=2 (i.e., s,p,d orbitals) are used for the angular part and three

Cambridge, University of

479

Collge doctoral N attribu par la bibliothque  

E-Print Network (OSTI)

of the rm: 1/2 (24b) where n, ,n,,,n,,are the powers of x, y, and z, respec- tively, in the Kubic harmonics) for the atomic orbitals. Kubic harmonics up to 1=2 (i.e., s,p,d orbitals) are used for the angular part and three

Paris-Sud XI, Université de

480

Granular physics in low-gravity environments using DEM  

E-Print Network (OSTI)

Granular materials of different sizes are present on the surface of several atmosphere-less Solar System bodies. The phenomena related to granular materials have been studied in the framework of the discipline called Granular Physics; that has been studied experimentally in the laboratory and, in the last decades, by performing numerical simulations. The Discrete Element Method simulates the mechanical behavior of a media formed by a set of particles which interact through their contact points. The difficulty in reproducing vacuum and low-gravity environments makes numerical simulations the most promising technique in the study of granular media under these conditions. In this work, relevant processes in minor bodies of the Solar System are studied using the Discrete Element Method. Results of simulations of size segregation in low-gravity environments in the cases of the asteroids Eros and Itokawa are presented. The segregation of particles with different densities was analysed, in particular, the case of comet P/Hartley 2. The surface shaking in these different gravity environments could produce the ejection of particles from the surface at very low relative velocities. The shaking causing the above processes is due to: impacts, explosions like the release of energy by the liberation of internal stresses or the re accommodation of material. Simulations of the passage of impact-induced seismic waves through a granular medium were also performed. We present several applications of the Discrete Element Methods for the study of the physical evolution of agglomerates of rocks under low-gravity environments.

G. Tancredi; A. Maciel; L. Heredia; P. Richeri; S. Nesmachnow

2011-11-26T23:59:59.000Z

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


481

Estimation of tracer diffusion coefficients of ions in aqueous solution  

DOE Green Energy (OSTI)

Equations are given for estimating tracer diffusion coefficients D/sub i//sup 0/ of ions at infinite dilution in terms of limiting ionic conductances ..lambda../sub i//sup 0/. Also given are generalized Nernst-Hartley equations for binary and multicomponent diffusion coefficients D/sup 0/ and D/sub ij//sup 0/, respectively, at infinite dilution. Data, estimates, and correlations for ..lambda../sub i//sup 0/ at 25/sup 0/C and other temperatures are discussed. Estimated values of ..lambda../sub i//sup 0/ are tabulated from 0-300/sup 0/C for ions of waste isolation interest and for ions of economic interest in geothermal brines. Estimates of their tracer diffusion coefficients at infinite dilution are tabulated. A rule of thumb, good to a factor of 2, is presented. Very limited data (available only at 25/sup 0/C) indicate that D/sub i//D/sub i//sup 0/ generally declines as the concentration of salt or supporting electrolyte increases. 6 figures, 2 tables.

Miller, D.G.

1982-09-07T23:59:59.000Z

482

Control of multiscale systems with constraints. 1. Basic principles of the concept of evolution of systems with varying constraints  

E-Print Network (OSTI)

Physical fundamentals of the self-organizing theory for the system with varying constraints are considered. A variation principle, specifically the principle of dynamic harmonization as a generalization of the Gauss-Hertz principle for the systems with varying internal structure is formulated. In compliance with this principle the system evolves through dynamics of the processes leading to harmonization of the internal multiscale structure of the system and its connections with external actions as a result of minimizing the dynamic harmonization function. Main principles of the shell model of self-organization under the action of the dominating entropic disturbance are formulated.

S. Adamenko; V. Bolotov; V. Novikov

2013-07-17T23:59:59.000Z

483

Mitigating PQ Problems in Legacy Data Centers  

Science Conference Proceedings (OSTI)

The conclusions of this presentation are: (1) Problems with PQ in legacy data centers still exist and need to be mitigated; (2) Harmonics generated by non-linear IT load can be lowered by passive, active and hybrid cancellation methods; (3) Harmonic study is necessary to find the best way to treat PQ problems; (4) AHF's and harmonic cancellation transformers proved to be very efficient in mitigating PQ problems; and (5) It is important that IT leaders partner with electrical engineering to appropriate ROI statements, justifying many of these expenditures.

Ilinets, Boris; /SLAC

2011-06-01T23:59:59.000Z

484

Theory of a laser-plasma method for detecting terahertz radiation  

SciTech Connect

A theory is developed for calculating the spectrum and the shape of a terahertz wave packet from the temporal profile of the energy of the second harmonic of the laser field generated during nonlinear interaction of laser and terahertz pulses in an optical-breakdown plasma. The spectral and temporal characteristics of the second-harmonic envelope and a terahertz pulse are shown to coincide only for short laser pulses. For long laser pulses, the second-harmonic spectral line shifts to the red and its temporal profile is determined by the time integral of the electric field of terahertz radiation.

Frolov, A. A., E-mail: frolov@ihed.ras.ru [Russian Academy of Sciences, Joint Institute for High Temperatures (Russian Federation); Borodin, A. V.; Esaulkov, M. N.; Kuritsyn, I. I.; Shkurinov, A. P. [Moscow State University (Russian Federation)

2012-06-15T23:59:59.000Z

485

Bounds on distance distributions in codes of known size  

Science Conference Proceedings (OSTI)

We treat the problem of bounding components of the possible distance distributions of codes given the knowledge of their size and possibly minimum distance. Using the Beckner inequality from harmonic analysis, we derive upper bounds on distance distribution ...

A. E. Ashikhmin; G. D. Cohen; M. Krivelevich; S. N. Litsyn

2005-01-01T23:59:59.000Z

486

Who decides what is fair in fair trade? The agri-environmental governance of standards, access, and price  

E-Print Network (OSTI)

D. andPonte. , S. (2005) Standards as a new form of social1 , pp. 11-21. 72. Mutersbaugh, T. (2005) Fighting standardswith standards: harmonization, rents, and social

Bacon, Christopher M.

2010-01-01T23:59:59.000Z

487

Darboux transforms and simple factor dressing of constant mean curvature surfaces  

E-Print Network (OSTI)

We define a transformation on harmonic maps from a Riemann surface into the 2-sphere which depends on a complex parameter, the so-called mu-Darboux transformation. In the case when the harmonic map N is the Gauss map of a constant mean curvature surface f and the parameter is real, the mu-Darboux transformation of -N is the Gauss map of a classical Darboux transform f. More generally, for all complex parameter the transformation on the harmonic Gauss map of f is induced by a (generalized) Darboux transformation on f. We show that this operation on harmonic maps coincides with simple factor dressing, and thus generalize results on classical Darboux transforms of constant mean curvature surfaces: every mu-Darboux transform is a simple factor dressing, and vice versa.

Burstall, F E; Leschke, K; Quintino, A

2010-01-01T23:59:59.000Z

488

Ocean Tides from TOPEX/Poseidon Sea Level Data  

Science Conference Proceedings (OSTI)

Tidal constants are computed from TOPEX/Poseidon sea level data in the northeast Pacific Ocean for the period of September 1992December 1997. The method used is harmonic analysis. Tidal constituents are also calculated at track crossover ...

J. Y. Cherniawsky; M. G. G. Foreman; W. R. Crawford; R. F. Henry

2001-04-01T23:59:59.000Z

489

The Wind-Driven Shelf and Slope Water Flow in Terms of a Local and a Remote Response  

Science Conference Proceedings (OSTI)

Clarke and Van Gorder suggest that many coastally trapped wave modes are needed to describe the wind-driven shelf and slope water alongshore velocity field. Calculations with an harmonic wind forcing confirm this and show that, for example, the ...

Manuel Lopez; Allan J. Clarke

1989-08-01T23:59:59.000Z

490

Technologies - Lawrence Livermore National Laboratory  

Harmonic Air Motor; Two Stage Engine Technology; Industrial Partnerships Office P.O. Box 808, L-795 Livermore, CA 94551 Phone: (925) 422-6416 Fax: (925) 423-8988

491

Heat transport in silicon from first-principles calculations  

E-Print Network (OSTI)

Using harmonic and anharmonic force constants extracted from density functional calculations within a supercell, we have developed a relatively simple but general method to compute thermodynamic and thermal properties of ...

Esfarjani, Keivan

492

Induction machine stray loss from inter-bar currents  

E-Print Network (OSTI)

Stray load loss refers generally to the sources of induction machine loss not accounted for by typical calculations of primary or secondary copper loss, no load core loss, or friction and windage loss. Harmonic rotor bar ...

Englebretson, Steven Carl

2009-01-01T23:59:59.000Z

493

Tidal Current Predictions Using Rotary Empirical Orthogonal Functions  

Science Conference Proceedings (OSTI)

In the conventional point tidal analysis approach, a set of tidal harmonic constituents is derived from each time series of currents. These sets of tidal constituents are then used to predict the tidal currents. For a large database of current ...

Betty Ng

1993-12-01T23:59:59.000Z

494

Depth, distribution, and density of CO2 deposition on Mars Oded Aharonson,1  

E-Print Network (OSTI)

, and it decreases equatorward. Decomposition of the signal into harmonics in time allows inspection of the spatial.g., Briggs et al., 1977; James, 1979; Kieffer, 1979; Cantor et al., 1998; James and Cantor, 2001

Zuber, Maria

495

Development and Implementation Support Programme  

E-Print Network (OSTI)

NWALandagreeontimelines andsamplematerials October2013 ValidateandapplyimprovedUF6samplingmethods.(KeyObjective2)December2012 Harmonize.Enhancetrust/communicationwithMemberStates. ImplementanewsoftwaresystemreplacingthecurrentProcurementTrackingSystem ........................................................................................................................... 92 SGOA-02 Safeguards System for JNFL MOX Fuel Fabrication Plant (J

Ohta, Shigemi

496

A review of methods for grounding grid analysis  

Science Conference Proceedings (OSTI)

This paper presents a brief review of the most important methods available for the grounding grid analysis. This includes numerical methods intended for the grounding grid direct current, time-harmonic current and transient current energization. Emphasis ...

Petar Saraj?ev; Slavko Vujevic

2009-09-01T23:59:59.000Z

497

2010 KPMG LLP, a Canadian limited liability partnership and a member firm of the KPMG network of independent member firms affiliated with KPMG International Cooperative ("KPMG International"), a Swiss entity. All rights reserved. Printed in Canada.  

E-Print Network (OSTI)

· Alberta · No PST · Arguably first province to harmonize! · British Columbia · 12% HST (July 1, 2010 ­ Transitional Rules ·Continuous supplies · Includes property or services supplied by means of · Wire, pipeline

Ma, Bin

498

THE LBL ADVANCED LIGHT SOURCE  

E-Print Network (OSTI)

6J Harmonic distribution of horizontal COD. A. 1ackson andto closed orbit distortion (COD), and to the effects ofalgorithms to minimize the COD using a combination of the

Jackson, A.

2010-01-01T23:59:59.000Z

499

Climatic Regimes of Tropical Convection and Rainfall  

Science Conference Proceedings (OSTI)

Annual distribution and phase propagation of tropical convection are delineated using harmonic and amplitude-phase characteristics analysis of climatological pentad mean outgoing longwave radiation and monthly frequencies of highly reflective ...

Bin Wang

1994-07-01T23:59:59.000Z

500

Impact of Distributed Generation and Series Compensation on Distribution Network  

E-Print Network (OSTI)

are investigated. A doubly-fed induction generator (DFIG)-based DG unit and a series capacitor (SC) and a thyristor DFIG units. The converter of the DFIG is modeled as an unbalanced harmonic-generating source

Pota, Himanshu Roy