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1

The Potential of Elelcltric Exhaust Gas Turbocharging for HD...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Elelcltric Exhaust Gas Turbocharging for HD DIesel Engines The Potential of Elelcltric Exhaust Gas Turbocharging for HD DIesel Engines 2005 Diesel Engine Emissions Reduction (DEER)...

2

Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Inspection  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Vehicle Vehicle (NGV) Inspection Requirements to someone by E-mail Share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Inspection Requirements on Facebook Tweet about Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Inspection Requirements on Twitter Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Inspection Requirements on Google Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Inspection Requirements on Delicious Rank Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Inspection Requirements on Digg Find More places to share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Inspection Requirements on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type

3

Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Infrastructure  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Natural Gas Vehicle Natural Gas Vehicle (NGV) and Infrastructure Initiative to someone by E-mail Share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Infrastructure Initiative on Facebook Tweet about Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Infrastructure Initiative on Twitter Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Infrastructure Initiative on Google Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Infrastructure Initiative on Delicious Rank Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Infrastructure Initiative on Digg Find More places to share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Infrastructure Initiative on AddThis.com... More in this section... Federal

4

Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Acquisition  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Gas Vehicle Gas Vehicle (NGV) Acquisition Requirements to someone by E-mail Share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Acquisition Requirements on Facebook Tweet about Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Acquisition Requirements on Twitter Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Acquisition Requirements on Google Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Acquisition Requirements on Delicious Rank Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Acquisition Requirements on Digg Find More places to share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Acquisition Requirements on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type

5

Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Weight Exemption  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Vehicle Vehicle (NGV) Weight Exemption to someone by E-mail Share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Weight Exemption on Facebook Tweet about Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Weight Exemption on Twitter Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Weight Exemption on Google Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Weight Exemption on Delicious Rank Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Weight Exemption on Digg Find More places to share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Weight Exemption on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Natural Gas Vehicle (NGV) Weight Exemption

6

Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Grants  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

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7

Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Rebates  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Natural Gas Vehicle Natural Gas Vehicle (NGV) Rebates to someone by E-mail Share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Rebates on Facebook Tweet about Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Rebates on Twitter Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Rebates on Google Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Rebates on Delicious Rank Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Rebates on Digg Find More places to share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Rebates on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Natural Gas Vehicle (NGV) Rebates National Grid rebates on a case-by-case basis to customers who purchase

8

Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Tax Credit  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Vehicle Vehicle (NGV) Tax Credit to someone by E-mail Share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Tax Credit on Facebook Tweet about Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Tax Credit on Twitter Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Tax Credit on Google Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Tax Credit on Delicious Rank Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Tax Credit on Digg Find More places to share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Tax Credit on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Natural Gas Vehicle (NGV) Tax Credit Effective January 1, 2014, individual and entities that place into service

9

Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Decals  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Natural Gas Vehicle Natural Gas Vehicle (NGV) Decals to someone by E-mail Share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Decals on Facebook Tweet about Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Decals on Twitter Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Decals on Google Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Decals on Delicious Rank Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Decals on Digg Find More places to share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Decals on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Natural Gas Vehicle (NGV) Decals Any person operating a vehicle that is capable of using compressed or

10

Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Rebate  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Natural Gas Vehicle Natural Gas Vehicle (NGV) Rebate to someone by E-mail Share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Rebate on Facebook Tweet about Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Rebate on Twitter Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Rebate on Google Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Rebate on Delicious Rank Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Rebate on Digg Find More places to share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Rebate on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Natural Gas Vehicle (NGV) Rebate Citizens Gas & Coke Utility (Citizens) offers rebates for qualified

11

Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Infrastructure  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

(NGV) and Infrastructure Rebate - Oklahoma Natural Gas to someone by E-mail (NGV) and Infrastructure Rebate - Oklahoma Natural Gas to someone by E-mail Share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Infrastructure Rebate - Oklahoma Natural Gas on Facebook Tweet about Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Infrastructure Rebate - Oklahoma Natural Gas on Twitter Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Infrastructure Rebate - Oklahoma Natural Gas on Google Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Infrastructure Rebate - Oklahoma Natural Gas on Delicious Rank Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Infrastructure Rebate - Oklahoma Natural Gas on Digg Find More places to share Alternative Fuels Data Center: Natural Gas

12

Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Propane  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Vehicle Vehicle (NGV) and Propane Vehicle Rebates to someone by E-mail Share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Propane Vehicle Rebates on Facebook Tweet about Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Propane Vehicle Rebates on Twitter Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Propane Vehicle Rebates on Google Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Propane Vehicle Rebates on Delicious Rank Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Propane Vehicle Rebates on Digg Find More places to share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Propane Vehicle Rebates on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type

13

Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Fueling  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Natural Gas Vehicle Natural Gas Vehicle (NGV) and Fueling Infrastructure Grants to someone by E-mail Share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Fueling Infrastructure Grants on Facebook Tweet about Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Fueling Infrastructure Grants on Twitter Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Fueling Infrastructure Grants on Google Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Fueling Infrastructure Grants on Delicious Rank Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Fueling Infrastructure Grants on Digg Find More places to share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Fueling Infrastructure Grants on AddThis.com...

14

Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Feasibility  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Natural Gas Vehicle Natural Gas Vehicle (NGV) Feasibility Evaluation to someone by E-mail Share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Feasibility Evaluation on Facebook Tweet about Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Feasibility Evaluation on Twitter Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Feasibility Evaluation on Google Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Feasibility Evaluation on Delicious Rank Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Feasibility Evaluation on Digg Find More places to share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Feasibility Evaluation on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type

15

Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Fueling  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Natural Gas Vehicle Natural Gas Vehicle (NGV) and Fueling Infrastructure Rebates - Texas Gas Service to someone by E-mail Share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Fueling Infrastructure Rebates - Texas Gas Service on Facebook Tweet about Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Fueling Infrastructure Rebates - Texas Gas Service on Twitter Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Fueling Infrastructure Rebates - Texas Gas Service on Google Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Fueling Infrastructure Rebates - Texas Gas Service on Delicious Rank Alternative Fuels Data Center: Natural Gas Vehicle (NGV) and Fueling Infrastructure Rebates - Texas Gas Service on Digg Find More places to share Alternative Fuels Data Center: Natural Gas

16

Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Home Fueling  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Natural Gas Vehicle Natural Gas Vehicle (NGV) Home Fueling Infrastructure Incentive - South Coast to someone by E-mail Share Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Home Fueling Infrastructure Incentive - South Coast on Facebook Tweet about Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Home Fueling Infrastructure Incentive - South Coast on Twitter Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Home Fueling Infrastructure Incentive - South Coast on Google Bookmark Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Home Fueling Infrastructure Incentive - South Coast on Delicious Rank Alternative Fuels Data Center: Natural Gas Vehicle (NGV) Home Fueling Infrastructure Incentive - South Coast on Digg Find More places to share Alternative Fuels Data Center: Natural Gas

17

Rydberg states of HD  

Science Journals Connector (OSTI)

The triplet nf Rydberg states of HD with n=9–17, L=3, v=1, and R=1,3 have been observed and identified with the laser–molecular-beam method. A 20-eV electron beam excites a collimated HD beam to the metastable 2p ?3 state. Two counterpropagating cw single-frequency laser beams excite the metastable molecule first to the intermediate 3d ?3 state, then to a triplet nf Rydberg state. The transition frequencies between the 3d and nf states have been measured to an accuracy of 0.02 cm-1. The long-range model gives the transition frequencies to an accuracy of approximately 0.1 cm-1. Using these energy-level measurements, the ionization potential of the metastable state has been determined to be 27 460.98(30) cm-1 and the energy difference between the triplet metastable and the singlet ground state has been determined to be 97 105.50(30) cm-1. In addition, the linewidths of the triplet Rydberg states have been measured, giving the autoionization rates.

Sander H. Kim and Eric Mazur

1995-08-01T23:59:59.000Z

18

State-Resolved Rotational Excitation in HD + HD Collisions  

Science Journals Connector (OSTI)

A novel pulsed-molecular-beam technique has been used to measure differential cross sections for state-resolved rotational transitions in HD + HD collisions. Inelastic transition probabilities are reported for the rotation-energy-level transitions JAJB=00?JA?JB?=(10, 01), 11, and (20, 02) at a center-of-mass scattering angle at 90° and at several collision energies. A brief description of the apparatus is provided.

W. Ronald Gentry and Clayton F. Giese

1977-11-14T23:59:59.000Z

19

Electric Dipole Moment of HD  

Science Journals Connector (OSTI)

The electric dipole moment of HD in its ground vibrational and electronic state has been obtained from the intensity of the pure rotational spectrum. Its value is (5.85±0.17) × 10-4 D.

M. Trefler and H. P. Gush

1968-04-01T23:59:59.000Z

20

Ultracold collisions between two light indistinguishable diatomic molecules: Elastic and rotational energy transfer in HD+HD  

Science Journals Connector (OSTI)

A close coupling quantum-mechanical calculation is performed for rotational energy transfer in a HD+HD collision at very low energy, down to the ultracold temperatures: T?10?8 K. A global six-dimensional H2-H2 potential-energy surface is adopted from a previous work [Boothroyd et al., J. Chem. Phys. 116, 666 (2002)]. State-resolved integral cross sections ?ij?i?j?(?kin) of different quantum-mechanical rotational transitions ij?i?j? in the HD molecules and corresponding state-resolved thermal rate coefficients kij?i?j?(T) have been computed. Additionally, for comparison, H2+H2 calculations for a few selected rotational transitions have also been performed. The hydrogen and deuterated hydrogen molecules are treated as rigid rotors in this work. A pronounced isotope effect is identified in the cross sections of these collisions at low and ultracold temperatures.

Renat A. Sultanov; Dennis Guster; S. K. Adhikari

2012-05-03T23:59:59.000Z

Note: This page contains sample records for the topic "hd ngv potential" 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

Rotational-level mixing and intracollisional interference in the pure rotational spectrum of HD gas  

Science Journals Connector (OSTI)

Rotational-level mixing by anisotropic intermolecular forces is found to be important to the mechanism which produces intracollisional interference effects in the pure rotational spectrum of HD and HD–inert-gas mixtures. The major contribution involves the anisotropic repulsive term in the potential and the anisotropic overlap-induced dipole moment. Improved agreement between calculation and experiment results when the mixing is included in the analysis.

G. C. Tabisz and J. Bradley Nelson

1985-02-01T23:59:59.000Z

22

Fuel economy and emissions reduction of HD hybrid truck over...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

reduction of HD hybrid truck over transient driving cycles and interstate roads Fuel economy and emissions reduction of HD hybrid truck over transient driving cycles and...

23

Intracollisional interference of R lines of HD in mixtures of deuterium hydride and helium gas  

Science Journals Connector (OSTI)

Line shapes of the R0(0) and R0(1) lines in the pure rotational band, and of the R1(0) and R1(1) lines in the fundamental band of HD are computed from first principles for HD molecules that interact collisionally with He atoms. Interference of the permanent dipole of the HD molecule and the interaction-induced dipole of HD–He supermolecular complex shapes these profiles. We use the close-coupling scheme for the scattering calculations which take into account the anisotropy of the HD–He interaction potential. Thus rotational level mixing is accounted for in a non-perturbative manner. The treatment is fully quantum mechanical and takes into account single binary collisions between HD and He. Spectral absorption profiles and line shape parameters of the R-lines are computed for comparison with existing measurements at 77 K. Agreement between theory and measurements is observed in the low-helium-density limit of the measured absorption as expected.

Magnus Gustafsson and Lothar Frommhold

2001-04-18T23:59:59.000Z

24

Novel theory of the HD dipole moment. I. Theory  

Science Journals Connector (OSTI)

A novel theory of the electric dipole moments of homopolar but isotopically asymmetric molecules (such as HD, HT, or DT) is formulated, such that electrical asymmetry and the resulting dipole moment arise as purely electronic properties within a suitable Born-Oppenheimer approximation, and nonadiabatic (rovibronic) perturbations play no part in the theory. It is shown thereby that a much simpler and more direct explanation for these dipole moments can be given than that invoking non- adiabatic perturbations: The dipole moment arises from isotopic variation of the local effective electronic reduced mass and its effects on binding energies and sizes of orbitals. It is an odd function of the isotopic splitting parameter ?0=(1/2)?m/?, where ?=(MA-MB)/(MA+MB) is the nuclear mass asymmetry for nuclei A,B and (m/?) is the electron-nuclear mass ratio (for HD, this parameter is 1.36×10-4). A canonical transformation exhibiting these effects (in the form of an asymmetric effective potential) is the basis for the new formulation. Since ?0 is small the resulting dipole moment function is essentially linear in ?0, and hence the dipole moment functions for HT and DT may be computed by rescaling the results for HD. Since the problem is purely electronic in the new formulation, variational and convergence studies are easy to carry out. In this and the following paper we formulate the new theory in detail and carry out variation-perturbation calculations of the HD dipole moment. The results are in good agreement with theoretical results obtained by nonadiabatic perturbation theory and demonstrate that this approach to isotopically induced dipole moments is valid.

W. R. Thorson; J. H. Choi; S. K. Knudson

1985-01-01T23:59:59.000Z

25

The nuclear fusion for the reactions2H(d, n)3He,2H(d, p)3H,3H(d, n)4He  

Science Journals Connector (OSTI)

In the present paper the elastic model for the subbarrier fusion is applied to the reactions2H(d, n)3He,2H(d, p)3H,3H(d, n)4He. A comparison between the values of the reaction rates obtained in the framework of t...

A. Scalia

1989-05-01T23:59:59.000Z

26

Lifetimes of rovibrational levels of HD+  

Science Journals Connector (OSTI)

A method for calculating the oscillator strengths for rovibrational transitions of a diatomic system within an approach that is not based on the Born-Oppenheimer (BO) approximation is presented. The non-BO wave functions representing the bound states of the system are expanded in terms of explicitly correlated Gaussian functions. The method is applied to calculate oscillator strengths for the HD+ ion for transitions between rotationless vibrational states and vibrational states which are rotationally singly excited. The effect of the asymmetry of the HD+ charge distribution on the oscillator strengths and on the lifetimes of the states is elucidated.

Nikita Kirnosov; Keeper L. Sharkey; Ludwik Adamowicz

2014-01-27T23:59:59.000Z

27

Rotational-vibrational transitions of interstitial HD in Si  

Science Journals Connector (OSTI)

The ir spectrum of interstitial HD in Si provides unique insight into the rotational motion of interstitial H2 because the rotational-vibrational transitions for the heteronuclear HD molecule are subject to less restrictive selection rules. ir lines for transitions between rotational-vibrational states of the interstitial HD molecule with rotational quantum numbers J=0, 1, and 2 have been observed. The assignment of the rotational-vibrational spectrum of interstitial HD, with additional transitions that occur for HD but not for H2 or D2, is confirmed by uniaxial stress results.

G. Alvin Shi; Michael Stavola; W. Beall Fowler; E Elinor Chen

2005-08-03T23:59:59.000Z

28

Sheldon H.D. Lee resume  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sheldon H.D. Lee Sheldon H.D. Lee Chemical Science and Engineering Division Argonne National Laboratory 9700 South Cass Avenue, Bldg. 205 Argonne, IL 60439-4837 phone: 630/252-4395 fax: 630/972-4442 e-mail: lees@anl.gov Professional Experience ï‚· Engineering design, installation, and testing of a micro-reactor test facility for steam reforming of ethanol at elevated pressures for distributed hydrogen production ï‚· Engineering design and installation, laboratory setup and testing, and data analysis for FASTER (Feasibility of Acceptable Start-Time Experimental Reformer) test facility ï‚· Design, fabrication, and installation of integrated methane reformer system based on Argonne autothermal reforming technology ï‚· Design, fabrication, installation, and testing of engineering-scale integrated

29

Induced dipole-moment function of HD  

Science Journals Connector (OSTI)

The induced dipole-moment function for a pair of HD molecules contains components having different angular symmetries from those occurring for pairs of homonuclear molecules, H2 or D2. These additional components arise from a coordinate transformation from the vector describing the separation between the centers of interaction to the vector describing the separation between the centers of mass. By use of a Taylor-series expansion, general expressions for the first-order shifted components for both multipolar and overlap induction mechanisms, and specific results for higher-order multipole-induced shifted components, are given. The importance of these additional components for the calculation of the intensities of zero-phonon transitions in solid HD is illustrated by several examples, and predicted intensities for the strongest unmeasured transitions are given.

J. D. Poll; M. Attia; R. H. Tipping

1989-06-01T23:59:59.000Z

30

Planetary Companions Around Two Solar Type Stars: HD 195019 and HD 217107  

E-Print Network [OSTI]

We have enlarged the sample of stars in the planet search at Lick Observatory. Doppler measurements of 82 new stars observed at Lick Observatory, with additional velocities from Keck Observatory, have revealed two new planet candidates. The G3V/IV star, HD 195019, exhibits Keplerian velocity variations with a period of 18.27 d, an orbital eccentricity of 0.03 +/- 0.03, and M sin i = 3.51 M_Jup. Based on a measurement of Ca II H&K emission, this star is chromospherically inactive. We estimate the metallicity of HD 195019 to be approximately solar from ubvy photometry. The second planet candidate was detected around HD 217107, a G7V star. This star exhibits a 7.12 d Keplerian period with eccentricity 0.14 +/- 0.05 and M sin i = 1.27 M_Jup. HD 217107 is also chromospherically inactive. The photometric metallicity is found to be [Fe/H] = +0.29 +/- 0.1 dex. Given the relatively short orbital period, the absence of tidal spin-up of HD 217107 provides a theoretical constraint on the upper limit of the companion mass of < 11 M_Jup.

D. A. Fischer; G. W. Marcy; R. P. Butler; S. S. Vogt; K. Apps

1998-10-26T23:59:59.000Z

31

Spectropolarimetric observations of the transiting planetary system of the K dwarf HD 189733  

E-Print Network [OSTI]

With a Jupiter-mass planet orbiting at a distance of only 0.031 AU, the active K2 dwarf HD 189733 is a potential candidate in which to study the magnetospheric interactions of a cool star with its recently-discovered close-orbiting giant planet. We decided to explore the strength and topology of the large-scale magnetosphere of HD 189733, as a future benchmark for quantitative studies for models of the star/planet magnetic interactions. To this end, we used ESPaDOnS, the new generation spectropolarimeter at the Canada-France-Hawaii 3.6m telescope, to look for Zeeman circular polarisation signatures in the line profiles of HD 189733 in 2006 June and August. Zeeman signatures in the line profiles of HD 189733 are clearly detected in all spectra, demonstrating that a field is indeed present at the surface of the star. The Zeeman signatures are not modulated with the planet's orbital period but apparently vary with the stellar rotation cycle. The reconstructed large-scale magnetic field, whose strength reaches a ...

Moutou, C; Savalle, R; Hussain, G; Alecian, E; Bouchy, F; Catala, C; Cameron, A Collier; Udry, S; Vidal-Madjar, A

2007-01-01T23:59:59.000Z

32

JPP-HdM p. 1/? Qu es el lgebra?  

E-Print Network [OSTI]

JPP-HdM ­ p. 9/? #12;Francois Viete (1540-1603) Introduce tres tipos de análisis: JPP-HdM ­ p. 10/? #12;Francois Viete (1540-1603) Introduce tres tipos de análisis: · Zetético: transformación de un problema en una ecuación. JPP-HdM ­ p. 11/? #12;Francois Viete (1540-1603) Introduce tres tipos de análisis

Pinasco, Juan Pablo

33

Potential  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and and Frictional Drag on a Floating Sphere in a Flowing Plasma I. H. Hutchinson Plasma Science and Fusion Center Massachusetts Institute of Technology, Cambridge, MA, USA The interaction of an ion-collecting sphere at floating potential with a flowing colli- sionless plasma is investigated using the "Specialized Coordinate Electrostatic Particle and Thermals In Cell" particle-in-cell code SCEPTIC[1, 2]. Code calculations are given of potential and the total force exerted on the sphere by the flowing plasma. This force is of crucial importance to the problem of dusty plasmas, and the present results are the first for a collisionless plasma to take account of the full self-consistent potential. They reveal discrepancies amounting to as large as 20% with the standard analytic expressions, in parameter regimes where the analytic approximations might have been expected

34

Temperature dependence of the collisional interference in the pure rotational far-infrared spectrum of HD  

Science Journals Connector (OSTI)

The far-infrared pure rotational absorption spectrum of HD and HD-X mixtures was measured at 77 and 195 K. Specifically, the rotational lines R(0)–R(2) were observed for HD-HD, HD-He, HD-Ne, and HD-H2 at 77 K and R(0)–R(3) for HD-HD, HD-He, and HD-Ar at 195 K. Refined values of the permanent dipole moment of HD are deduced. Collisional interference in the spectrum is characterized by a parameter proportional to the ratio of the average-induced dipole moment to the permanent dipole moment. Its variation with temperature, particularly a change in sign, is not explainable by current theory. The spectral line-shape parameters of width, frequency shift, and asymmetry are determined and their density and temperature behavior discussed with reference to the impact theory of line broadening.

Lorenzo Ulivi; Z. Lu; G. C. Tabisz

1989-07-15T23:59:59.000Z

35

E-Print Network 3.0 - ae star hd101412 Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

in Herbig Ae stars, we pointed out that HD 101412 possesses the strongest magnetic field among... revealing the presence of resolved magnetically split lines. HD 101412 is the...

36

Near-infrared spectroscopy of HD the barrier to linearity  

E-Print Network [OSTI]

Near-infrared spectroscopy of HD 3 above the barrier to linearity BY JENNIFER L. GOTTFRIED, transitions of HC 3 above the barrier to linearity have been observed. A highly sensitive near-infrared-adiabatic and radiative corrections is revealed. Keywords: HD 3 ; near-infrared spectroscopy; barrier to linearity 1

Oka, Takeshi

37

HD gas analysis with Gas Chromatography and Quadrupole Mass Spectrometer  

E-Print Network [OSTI]

A gas analyzer system has been developed to analyze Hydrogen-Deuteride (HD) gas for producing frozen-spin polarized HD targets, which are used for hadron photoproduction experiments at SPring-8. Small amounts of ortho-H$_{2}$ and para-D$_{2}$ gas mixtures ($\\sim$0.01%) in the purified HD gas are a key to realize a frozen-spin polarized target. In order to obtain reliable concentrations of these gas mixtures in the HD gas, we produced a new gas analyzer system combining two independent measurements with the gas chromatography and the QMS. The para-H$_{2}$, ortho-H$_{2}$, HD, and D$_{2}$ are separated using the retention time of the gas chromatography and the mass/charge. It is found that the new gas analyzer system can measure small concentrations of $\\sim$0.01% for the otho-H$_2$ and D$_2$ with good S/N ratios.

T. Ohta; S. Bouchigny; J. -P. Didelez; M. Fujiwara; K. Fukuda; H. Kohri; T. Kunimatsu; C. Morisaki; S. Ono; G. Rouille; M. Tanaka; K. Ueda; M. Uraki; M. Utsuro; S. Y. Wang; M. Yosoi

2011-01-28T23:59:59.000Z

38

Distillation of hydrogen isotopes for polarized HD target  

E-Print Network [OSTI]

We have developed a cryogenic distillation system to purify Hydrogen-Deuteride (HD) gas for a polarized HD target in LEPS experiments at SPring-8. A small amount of ortho-H$_2$ ($\\sim$0.01%) in the HD gas plays an important role in efficiently polarizing the HD target. Since there are 1$\\sim$5% impurities of H$_2$ and D$_2$ in commercially available HD gases, it is inevitable that the HD gas is purified up to $\\sim$99.99%. The distillation system has a cryogenic pot (17$\\sim$21 K) containing many small stainless steel cells called Heli-pack. Commercial HD gas with an amount of 5.2 mol is fed into the pot. We carried out three distillation runs by changing temperatures (17.5 K and 20.5 K) and gas extraction speeds (1.3 ml/min and 5.2 ml/min). The extracted gas was analyzed by using a gas analyzer system combining a quadrupole mass spectrometer with a gas chromatograph. The HD gas of 1 mol with a purity better than 99.99% has been successfully obtained. The effective NTS (Number of Theoretical Stages), which is an indicator of the distillator performances, is obtained as 37.2$\\pm$0.6. This value is in reasonable agreement with a designed value of 37.9. The HD target is expected to be efficiently polarized under a well-controlled condition by doping an optimal amount of ortho-H$_2$ to the purified HD gas.

T. Ohta; S. Bouchigny; J. -P. Didelez; M. Fujiwara; K. Fukuda; H. Kohri; T. Kunimatsu; C. Morisaki; S. Ono; G. Rouill'; M. Tanaka; K. Ueda; M. Uraki; M. Utsuro; S. Y. Wang; M. Yosoi

2011-06-14T23:59:59.000Z

39

HD 51106 and HD 50747: an ellipsoidal binary and a triple system observed with CoRoT  

E-Print Network [OSTI]

We present an analysis of the observations of HD 51106 and HD 50747 by the satellite CoRoT, obtained during its initial run, and of the spectroscopic preparatory observations. AIMS: We complete an analysis of the light curve, extract the main frequencies observed, and discuss some preliminary interpretations about the stars. Methods: We used standard Fourier transform and pre-whitening methods to extract information about the periodicities of the stars. Results: HD 51106 is an ellipsoidal binary, the light curve of which can be completely explained by the tidal deformation of the star and smaller secondary effects. HD 50747 is a triple system containing a variable star, which exhibits many modes of oscillation with periods in the range of a few hours. On the basis of this period range and the analysis of the physical parameters of the star, we conclude that HD 50747 is a Gamma-Doradus star.

Dolez, N; Michel, E; Hua, A Hui Bon; Vauclair, G; Contel, D Le; Mathias, P; Poretti, E; Amado, P J; Rainer, M; Samadi, R; Baglin, A; Catala, C; Auvergne, M; Uytterhoeven, K; Valtier, J C

2009-01-01T23:59:59.000Z

40

Capturing Video Using the SONY GV-HD700 Cassette Deck In the AV Production Room (Room 261), Mann Library has a SONY GV-HD700 Digital HD Video  

E-Print Network [OSTI]

Capturing Video Using the SONY GV-HD700 Cassette Deck In the AV Production Room (Room 261), Mann Library has a SONY GV-HD700 Digital HD Video Cassette Deck. It is attached to the left side Mac Pro Creation Station, and can be used to "capture", or convert video from miniDV tapes to digital files. 1

Angenent, Lars T.

Note: This page contains sample records for the topic "hd ngv potential" 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

Deuteron spin-lattice relaxation for HD in solid argon  

Science Journals Connector (OSTI)

Measurements, using 55-MHz deuteron magnetic resonance (DMR), are reported of deuteron spin-lattice relaxation times for HD in solid argon at concentrations of 300–1100 ppm over the temperature range of 10–70 K. The relaxation times increase rapidly, from 10 to 4000 sec, as the temperature is reduced and are independent of the sample’s para-D2 concentration. Comparisons of deuteron spin-lattice relaxation times for HD in solid argon are made with previously reported relaxation times for solid HD–n-D2 mixtures and for ortho-H2 and para-D2 in solid argon. The very different relaxation behavior for HD can be understood because it is an asymmetric molecule. The lack of exchange symmetry results in an increasing probability of the molecule being in a J=0 rotational state as the temperature is reduced. Nuclear spin-lattice relaxation in HD arises from phonon-induced ?mJ transitions for those molecules in the J=1 states. A theory is presented to calculate the nuclear spin-lattice relaxation rate (1/T1) in terms of a molecular decay rate (?) that arises from ?mJ or ?J transitions. The decay rate ? as a function of temperature is determined from the relaxation data. It is found that the asymmetric rotor HD molecules have a coupling to the lattice phonons that is much stronger than for ortho-H2 and para-D2.

Joseph Ganem; Peter A. Fedders; R. E. Norberg

1993-02-01T23:59:59.000Z

42

NGV and FCV Light Duty Transportation Perspective  

Broader source: Energy.gov (indexed) [DOE]

transportation perspectives Matt Fronk, Matt Fronk & Associates, LLC 1 OctOber 2011 | ArgOnne nAtiOnAl lAbOrAtOry NG Workshop summary report - appeNDIX G 2 OctOber 2011 | ArgOnne...

43

NGV and FCV Light Duty Transportation Perspective  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

G G presentation slides: Natural Gas and Fuel Cell Vehicle Light-Duty transportation perspectives Matt Fronk, Matt Fronk & Associates, LLC 1 OctOber 2011 | ArgOnne nAtiOnAl lAbOrAtOry NG Workshop summary report - appeNDIX G 2 OctOber 2011 | ArgOnne nAtiOnAl lAbOrAtOry NG Workshop summary report - appeNDIX G 3 OctOber 2011 | ArgOnne nAtiOnAl lAbOrAtOry NG Workshop summary report - appeNDIX G 4 OctOber 2011 | ArgOnne nAtiOnAl lAbOrAtOry NG Workshop summary report - appeNDIX G 5 OctOber 2011 | ArgOnne nAtiOnAl lAbOrAtOry NG Workshop summary report - appeNDIX G 6 OctOber 2011 | ArgOnne nAtiOnAl lAbOrAtOry NG Workshop summary report - appeNDIX G 7 OctOber 2011 | ArgOnne nAtiOnAl lAbOrAtOry NG Workshop summary report - appeNDIX G

44

Differential Cross Sections for the Excitation of Single Rotational Quantum Transitions: HD + Ne  

Science Journals Connector (OSTI)

Differential cross sections for the rotational excitation from j=0 to j=1 of HD molecules in collisions with Ne atoms have been measured in a crossed molecular beam experiment. The inelasticity is obtained by time-of-flight analysis of the scattered particles using the pseudorandom chopper method. The measured cross sections of 0.31 to 0.45 Å2/sr at energies of about 30 meV and angles between 40° and 80° prove very sensitive to the angle-dependent part of the interaction potential as shown by a comparison with calculated data.

U. Buck; F. Huisken; J. Schleusener; H. Pauly

1977-03-28T23:59:59.000Z

45

Potential Effect of Pollutantn Emissions on Global Warming: First...  

Broader source: Energy.gov (indexed) [DOE]

NGV E. JOUBERT & G.PLASSAT, August 2004 Comparaison Buses Multicriteria Health Health GHG GHG Cost Cost Public Public perception perception CO HC NOx Part Non Regl WtW Energy...

46

Grid-based seismic modelling at high and low signal-to-noise ratios HD 181420 and HD 175272  

E-Print Network [OSTI]

Context: Recently, the CoRoT target HD 175272 (F5V), which shows a weak signal of solar-like oscillations, was modelled by a differential asteroseismic analysis (Ozel et al. 2013) relative to a seismically similar star, HD 181420 (F2V), for which there is a clear signature of solar-like oscillations. The results provided by Ozel et al. (2013) indicate the possibility of HD 175272 having subsolar mass, while being of the order of 1000 K hotter than the Sun. This seems unphysical -- standard stellar evolution theory generally does not predict solar-metallicity stars of subsolar mass to be hotter than about 6000K -- and calls for a reanalysis of this star. Aims: We aim to compare the performance of differential asteroseismic analysis with that of grid-based modelling. Methods: We use two sets of stellar model grids and two grid-fitting methods to model HD 175272 and HD 181420. Results: We find that we are able to model both stars with parameters that are both mutually compatible and comparable with other modelli...

Hekker, S

2014-01-01T23:59:59.000Z

47

Enhanced nuclear polarization of D in solid HD  

Science Journals Connector (OSTI)

Nuclear spin polarizations of D comparable to those of H in solid HD are achieved under conditions of extremely long H and D spin-lattice relaxation times such as are required for "frozen-spin" polarized targets. Standard steady-state dynamic polarization methods, spin mixing at low fields, and a new technique of adiabatic passage through "forbidden" transitions are employed. The requirements of strong magnetic fields, low temperature, and rapidity of spin-lattice relaxation rate, in order to obtain highly polarized deuterons in solid HD, become much less stringent than for the case of equilibrium D polarization, facilitating the utilization of solid-HD targets for polarized-D as well as polarized-H applications.

A. Honig and H. Mano

1976-09-01T23:59:59.000Z

48

Calibraton of a Directly Injected Natural Gas HD Engine for Class...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Calibraton of a Directly Injected Natural Gas HD Engine for Class 8 Truck Applications Calibraton of a Directly Injected Natural Gas HD Engine for Class 8 Truck Applications This...

49

On-Road Particle Matter Emissions from a MY 2010 Compliant HD...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Particle Matter Emissions from a MY 2010 Compliant HD Diesel Vehicle Driving Across the U.S. On-Road Particle Matter Emissions from a MY 2010 Compliant HD Diesel Vehicle Driving...

50

Hydrogen Bonding, H-D Exchange, and Molecular Mobility in Thin...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Bonding, H-D Exchange, and Molecular Mobility in Thin Water Films on TiO2(110). Hydrogen Bonding, H-D Exchange, and Molecular Mobility in Thin Water Films on TiO2(110). Abstract:...

51

E-Print Network 3.0 - ae star hd Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

field measurements of the Herbig Ae stars HD 101412 (left panel) and HD 150193 (right panel) (FORS 2... cool stars and solar-like stars Instrumentation The most successful...

52

Arabidopsis thaliana histone deacetylase 1 (AtHD1) and epigenetic regulation  

E-Print Network [OSTI]

deacetylase 1 (CASH) transgenic plants. AtHD1 is a homolog of RPD3 protein, a global transcriptional regulator in yeast. Expression of the antisense AtHD1 caused dramatic reduction in endogenous AtHD1 transcription, resulting in accumulation of acetylated...

Tian, Lu

2004-09-30T23:59:59.000Z

53

One solution for cloning and mutagenesis: In-Fusion HD Cloning Plus  

E-Print Network [OSTI]

One solution for cloning and mutagenesis: In-Fusion® HD Cloning Plus We describe in this editiona substitutions and base insertions. In-Fusion HD* Cloning Plus is sequence independent, seamless, directional can be carried out by combining the strength of the In-Fusion HD enzyme with inverse PCR. Introduction

Cai, Long

54

Hyperfine Structure in the Infrared Spectrum of HD  

Science Journals Connector (OSTI)

The hyperfine structure of the vibration-rotation transitions of HD+ is calculated to an accuracy of ± 0.5 MHz. The theoretical spectra confirm the experimental observation that only lines near the center of each transition are intense enough to be detected by the present experiments. The complete spectrum is some 1500 MHz wide and contains structure which has not yet been resolved.

Roger D. Ray and Phillip R. Certain

1977-04-11T23:59:59.000Z

55

FMI-HD High-Definition Formation Microimager | Open Energy Information  

Open Energy Info (EERE)

FMI-HD High-Definition Formation Microimager FMI-HD High-Definition Formation Microimager Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: FMI-HD High-Definition Formation Microimager Author Schlumberger Published Publisher Not Provided, 2013 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for FMI-HD High-Definition Formation Microimager Citation Schlumberger. FMI-HD High-Definition Formation Microimager [Internet]. 2013. [cited 2013/10/09]. Available from: http://www.slb.com/services/characterization/geology/wireline/fullbore_formation_microimager_hd.aspx Retrieved from "http://en.openei.org/w/index.php?title=FMI-HD_High-Definition_Formation_Microimager&oldid=687993" Categories: References Geothermal References Uncited References

56

Growth of the NGV Market:Growth of the NGV Market: Lessons LearnedLessons Learned  

E-Print Network [OSTI]

Natural Gas Consumption by Niche Sector"" · Underwritten by US DOE, through NETL · Prepared by Clean Vehicle

57

The chemical abundances of the Ap star HD94660  

SciTech Connect (OSTI)

In this work I present the determination of chemical abundances of the Ap star HD94660, a possible rapid oscillating star. As all the magnetic chemically peculiar objects, it presents CNO underabundance and overabundance of iron peak elements of ?100 times and of rare earths up to 4 dex with respect to the Sun. The determination was based on the conversion of the observed equivalent widths into abundances simultaneously to the determination of effective temperature and gravity. Since the Balmer lines of early type stars are very sensitive to the surface gravity while the flux distribution is sensitive to the effective temperature, I have adopted an iterative procedure to match the H{sub ?} line profile and the observed UV-Vis-NIR magnitudes of HD94660 looking for a consistency between the metallicity of the atmosphere model and the derived abundances. From my spectroscopic analysis, this star belongs to the no-rapid oscillating class.

Giarrusso, M. [Università di Catania, Dipartimento di Fisica e Astronomia, Sezione Astrofisica, Via S. Sofia 78, 95123 Catania (Italy); INAF - Osservatorio Astrofisico di Catania, via S. Sofia 78, 95123 Catania (Italy); INFN - Laboratori Nazionali del Sud (Italy)

2014-05-09T23:59:59.000Z

58

Novel theory of the HD dipole moment. II. Computations  

Science Journals Connector (OSTI)

In the preceding paper we derived a new theory of the dipole moments of homopolar but isotopically asymmetric molecules (such as HD, HT, and DT) in which the electrical asymmetry appears directly in the electronic Hamiltonian (in an appropriate Born-Oppenheimer separation) and the dipole moment may be computed as a purely electronic property. In the present paper we describe variation-perturbation calculations and convergence studies on the dipole moment for HD, which is found to have the value 8.51×10-4 debye at 1.40 a.u. Using the two alternative formulations of the electronic problem, we can provide a test of basis-set adequacy and convergence of the results, and such convergence studies are reported here. We have also computed vibration-rotation transition matrix elements and these are compared with experimental and other theoretical results.

W. R. Thorson; J. H. Choi; S. K. Knudson

1985-01-01T23:59:59.000Z

59

Electric dipole rovibrational transitions in the HD molecule  

Science Journals Connector (OSTI)

The rovibrational electric dipole transitions in the ground electronic state of the HD molecule are studied. A simple, yet rigorous formula is derived for the transition rates in terms of the electric dipole moment function D(R), which is calculated in a wide range of R. Our numerical results for transition rates are in moderate agreement with experiments and previous calculations, but are at least an order of magnitude more accurate.

Krzysztof Pachucki and Jacek Komasa

2008-11-07T23:59:59.000Z

60

Limits on the Boron Isotopic Ratio in HD 76932  

E-Print Network [OSTI]

Data in the 2090 A B region of HD 76932 have been obtained at high S/N using the HST GHRS echelle at a resolution of 90,000. This wavelength region has been previously identified as a likely candidate for observing the B11/B10 isotopic splitting. The observations do not match a calculated line profile extremely well at any abundance for any isotopic ratio. If the B abundance previously determined from observations at 2500 A is assumed, the calculated line profile is too weak, indicating a possible blending line. Assuming that the absorption at 2090 A is entirely due to boron, the best-fit total B abundance is higher than but consistent with that obtained at 2500 A, and the best-fit isotopic ratio (B11/B10) is in the range ~10:1 to ~4:1. If the absorption is not entirely due to B and there is an unknown blend, the best-fit isotopic ratio may be closer to 1:1. Future observations of a similar metal-poor star known to have unusually low B should allow us to distinguish between these two possibilities. The constraints that can be placed on the isotopic ratio based on comparisons with similar observations of HD 102870 and HD 61421 (Procyon) are also discussed.

L. M. Rebull; D. K. Duncan; S. Johansson; J. Thorburn; B. Fields

1998-07-13T23:59:59.000Z

Note: This page contains sample records for the topic "hd ngv potential" 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

MULTIWAVELENGTH OBSERVATIONS OF THE RUNAWAY BINARY HD 15137  

SciTech Connect (OSTI)

HD 15137 is an intriguing runaway O-type binary system that offers a rare opportunity to explore the mechanism by which it was ejected from the open cluster of its birth. Here, we present recent blue optical spectra of HD 15137 and derive a new orbital solution for the spectroscopic binary and physical parameters of the O star primary. We also present the first XMM-Newton observations of the system. Fits of the EPIC spectra indicate soft, thermal X-ray emission consistent with an isolated O star. Upper limits on the undetected hard X-ray emission place limits on the emission from a proposed compact companion in the system, and we rule out a quiescent neutron star (NS) in the propeller regime or a weakly accreting NS. An unevolved secondary companion is also not detected in our optical spectra of the binary, and it is difficult to conclude that a gravitational interaction could have ejected this runaway binary with a low mass optical star. HD 15137 may contain an elusive NS in the ejector regime or a quiescent black hole with conditions unfavorable for accretion at the time of our observations.

McSwain, M. Virginia; Aragona, Christina; Marsh, Amber N.; Roettenbacher, Rachael M. [Department of Physics, Lehigh University, Bethlehem, PA 18015 (United States); De Becker, Michael [Institut d'Astrophysique et Geophysique, Universite de Liege, FNRS (Belgium); Roberts, Mallory S. E. [Eureka Scientific, Inc., Oakland, CA 94602-3017 (United States); Boyajian, Tabetha S.; Gies, Douglas R. [Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30302-4106 (United States); Grundstrom, Erika D. [Physics and Astronomy Department, Vanderbilt University, Nashville, TN 37235 (United States)], E-mail: mcswain@lehigh.edu, E-mail: cha206@lehigh.edu, E-mail: anm506@lehigh.edu, E-mail: rmr207@lehigh.edu, E-mail: debecker@astro.ulg.ac.be, E-mail: malloryr@gmail.com, E-mail: tabetha@chara.gsu.edu, E-mail: gies@chara.gsu.edu, E-mail: erika.grundstrom@vanderbilt.edu

2010-03-15T23:59:59.000Z

62

Predicted intensities for new Raman transitions in solid HD  

Science Journals Connector (OSTI)

The scattering efficiencies for the zero-phonon and phonon branches associated with predicted new Raman transitions in solid HD are calculated. These transitions arise from the interaction-induced polarizability of a pair of molecules expressed in terms of the vector separation between the centers of mass and satisfy different rotational selection rules from those of allowed Raman transitions. For single transitions in which only one molecule of the pair is excited by the incoming photon, one expects an R branch, while, for double transitions in which both molecules are excited, one expects R+S and T+S branches with progressively less intensity. A previously obtained experimental Raman spectrum of solid HD does have spectral features similar in shape and intensity to those predicted for the RR phonon branch, although this feature was tentatively assigned as a two-phonon Raman-active transition. We conclude that a new Raman study of solid HD carried out with higher sensitivity and over a greater frequency region would be of interest to determine the correct assignment of this feature and to look for other predicted transitions resulting from the interaction-induced polarizability.

M. Attia; M. Ali; R. H. Tipping; J. D. Poll

1989-11-01T23:59:59.000Z

63

Nuclear Spin Relaxation and Double Resonance in HD Gas  

Science Journals Connector (OSTI)

Nuclear magnetic double-resonance experiments were performed on a gaseous sample containing a mixture of HD and CO2 at high pressure by observing the spin-spin multiplet in the proton-resonance spectrum and irradiating either the deuteron transitions or some of the proton transitions. The spectra show features arising from spin relaxation in HD. These features are analyzed by using the density-matrix theory of double resonance, assuming "strong"- and "weak"-collision models for the system. The equation of motion of the spin density matrix is exactly of the same form for both collision models, the only distinction coming from the dependence of the correlation times on the transformation properties of the lattice operators and on the quantum numbers characterizing the lattice states. The results of the analysis of HD double-resonance spectra indicate that the collisions in this case are "strong." The cross products between lattice terms which transform identically but belong to two different relaxation mechanisms make significant contributions to some of the correlation functions involved and thereby affect the final results.

B. D. Nageswara Rao and L. R. Anders

1965-10-04T23:59:59.000Z

64

E-Print Network 3.0 - analog hd 149026b Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

INTERSTELLAR BANDS TOWARD HD 62542 Mate A damkovics,1 Geoffrey A. Blake,2 and Benjamin... (DIBs) have been detected for the first time along the peculiar translucent...

65

Hybridization of the rotational state of HD adsorbed on porous Vycor glass  

Science Journals Connector (OSTI)

We present measurements of the infrared absorption corresponding to the rovibrational transitions of adsorbed HD. The absorption-line bandwidths at low coverages of HD on porous Vycor glass are more than two times larger than those of adsorbed H2 and D2. Also, we observe the transitions corresponding to ?J=3 and 5, whereas only the allowed ?J=0,±2 are observed for the pure isotopes. Our observations strongly suggest hindrance of the rotational states of HD, which may be attributed to the hybridization of rotations and adsorbed HD phonons resulting from the molecule’s mass asymmetry.

T. E. Huber; J. A. Perez; C. A. Huber

1992-01-15T23:59:59.000Z

66

Intracollisional interference in the pure rotational spectrum of HD: Determination of the permanent electric dipole moment  

Science Journals Connector (OSTI)

The intensity of the pure rotational absorption spectrum of gaseous HD is measured as a function of density for pure HD and HD-He and HD-Ar mixtures. The decrease in the absorption coefficient with increasing density is consistent with a destructive intracollisional interference between the transitions involving the permanent and collision-induced dipole moments. The permanent dipole moment of the molecule in its ground vibrational state is found to be J dependent and in the range (8-10)×10-4 D.

J. Bradley Nelson and G. C. Tabisz

1983-10-01T23:59:59.000Z

67

Precision spectroscopy of the hydrogen molecular ion HD+  

Science Journals Connector (OSTI)

Expectation values of the Breit operators and the Q terms are calculated for HD+ with the vibrational number v=0–4 and the total angular momentum L=0–4. Relativistic and radiative corrections to some rovibrational transition frequencies are determined. Numerical uncertainty in the R??2 order correction is reduced to sub-kHz or smaller. Our work provides an independent verification of Korobov's calculations [V. I. Korobov, Phys. Rev. A 74, 052506 (2006); V. I. Korobov, Phys. Rev. A 77, 022509 (2008)].

Zhen-Xiang Zhong; Pei-Pei Zhang; Zong-Chao Yan; Ting-Yun Shi

2012-12-26T23:59:59.000Z

68

NatriFloTM HD-Q Membrane Adsorbers: Method Development and Buffer Selection  

E-Print Network [OSTI]

NatriFloTM HD-Q Membrane Adsorbers: Method Development and Buffer Selection Introduction Anion for the resin beads. Conventional membrane adsorbers cannot provide sufficient process robustness due to low adsorber with competing technologies. Table 1: NatriFlo HD-Q membrane adsorber versus column chromatography

Lebendiker, Mario

69

Conformational Analysis of Disordered Proteins Using H/D Exchange Mass Spectrometry  

E-Print Network [OSTI]

Conformational Analysis of Disordered Proteins Using H/D Exchange Mass Spectrometry By Copyright 2013 Theodore Robert Keppel Submitted to the graduate degree program in Chemistry and the Graduate Faculty of the University of Kansas...: Conformational Analysis of Disordered Proteins Using H/D Exchange Mass Spectrometry ______________________________ Chairperson David Weis Date Approved: 02/01/2013 iii Abstract Intrinsically disordered proteins (IDPs...

Keppel, Theodore Robert

2013-05-31T23:59:59.000Z

70

THE NEARBY, YOUNG, ISOLATED, DUSTY STAR HD 166191  

SciTech Connect (OSTI)

We report an in-depth study of the F8-type star HD 166191, identified in an ongoing survey for stars exhibiting infrared emission above their expected photospheres in the Wide-field Infrared Survey Explorer all-sky catalog. The fractional IR luminosity measured from 3.5 to 70 ?m is exceptionally high (L{sub IR}/L{sub bol} ? 10%). Near-diffraction-limited imaging observations with the T-ReCS Si filter set on the Gemini South telescope and adaptive optics imaging with the NIRC2 Lp filter on the Keck II telescope confirmed that the excess emission coincides with the star. Si-band images show a strong solid-state emission feature at ?10 ?m. Theoretical evolutionary isochrones and optical spectroscopic observations indicate a stellar age in the range 10-100 Myr. The large dust mass seen in HD 166191's terrestrial planet zone is indicative of a recent collision between planetary embryos or massive ongoing collisional grinding associated with planet building.

Schneider, Adam; Song, Inseok; Hufford, Tara [Department of Physics and Astronomy, University of Georgia, Athens, GA 30602 (United States); Melis, Carl [Center for Astrophysics and Space Sciences, University of California, San Diego, CA 92093 (United States); Zuckerman, B. [Department of Physics and Astronomy, University of California, Los Angeles, CA 90095 (United States); Bessell, Mike [Research School of Astronomy and Astrophysics, The Australian National University, Weston Creek, ACT 2611 (Australia); Hinkley, Sasha, E-mail: aschneid@physast.uga.edu, E-mail: song@physast.uga.edu, E-mail: tara@physast.uga.edu, E-mail: cmelis@ucsd.edu, E-mail: ben@astro.ucla.edu, E-mail: bessell@mso.anu.edu.au, E-mail: shinkley@astro.caltech.edu [Department of Astronomy, California Institute of Technology, Pasadena, CA 91125 (United States)

2013-11-01T23:59:59.000Z

71

Mid-InfraRed imaging of the circumstellar dust around three Herbig Ae stars : HD135344, CQTau, HD163296  

E-Print Network [OSTI]

Planet formation has been known for many years to be tied to the spatial distribution of gas and dust in disks around young stars. To constrain planet formation models, imaging observations of protoplanetary disks are required. In this framework, we have undertaken a mid-infrared imaging survey of Herbig Ae stars, which are pre-main sequence stars of intermediate mass still surrounded by a large amount of circumstellar material. The observations were made at a wavelength of 20.5 $\\mu$m with the CAMIRAS camera mounted at the Cassegrain focus of the Canada France Hawaii Telescope. We report the observations of three stars, HD135344, CQTau and HD163296. The circumstellar material around the three objects is spatially resolved. The extensions feature a disk like shape. The images provide direct information on two key parameters of the disk : its inclination and its outer radius. The outer radius is found to be quite different from the one deduced from disk models only constrained by fitting the Spectral Energy Distribution of the object. Other parameters of the disk, such as flaring, dust mass have been deduced from fitting both the observed extension and the spectral energy distribution with sophisticated disk models. Our results show how important imaging data are to tighten constraints on the disk model parameters.

C. Doucet; E. Pantin; P. O. Lagage; C. P. Dullemond

2006-08-29T23:59:59.000Z

72

Three-dimensional Atmospheric Circulation Models of HD 189733b and HD 209458b with Consistent Magnetic Drag and Ohmic Dissipation  

Science Journals Connector (OSTI)

We present the first three-dimensional circulation models for extrasolar gas giant atmospheres with geometrically and energetically consistent treatments of magnetic drag and ohmic dissipation. Atmospheric resistivities are continuously updated and calculated directly from the flow structure, strongly coupling the magnetic effects with the circulation pattern. We model the hot Jupiters HD 189733b (T eq ? 1200 K) and HD 209458b (T eq ? 1500 K) and test planetary magnetic field strengths from 0 to 30 G. We find that even at B = 3 G the atmospheric structure and circulation of HD 209458b are strongly influenced by magnetic effects, while the cooler HD 189733b remains largely unaffected, even in the case of B = 30 G and super-solar metallicities. Our models of HD 209458b indicate that magnetic effects can substantially slow down atmospheric winds, change circulation and temperature patterns, and alter observable properties. These models establish that longitudinal and latitudinal hot spot offsets, day-night flux contrasts, and planetary radius inflation are interrelated diagnostics of the magnetic induction process occurring in the atmospheres of hot Jupiters and other similarly forced exoplanets. Most of the ohmic heating occurs high in the atmosphere and on the dayside of the planet, while the heating at depth is strongly dependent on the internal heat flux assumed for the planet, with more heating when the deep atmosphere is hot. We compare the ohmic power at depth in our models, and estimates of the ohmic dissipation in the bulk interior (from general scaling laws), to evolutionary models that constrain the amount of heating necessary to explain the inflated radius of HD 209458b. Our results suggest that deep ohmic heating can successfully inflate the radius of HD 209458b for planetary magnetic field strengths of B ? 3-10 G.

Emily Rauscher; Kristen Menou

2013-01-01T23:59:59.000Z

73

H-D Electric Coop Inc (Minnesota) | Open Energy Information  

Open Energy Info (EERE)

Minnesota) Minnesota) Jump to: navigation, search Name H-D Electric Coop Inc Place Minnesota Utility Id 7870 References EIA Form EIA-861 Final Data File for 2010 - File2_2010[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 No rate schedules available. Average Rates Residential: $0.0942/kWh References ↑ "EIA Form EIA-861 Final Data File for 2010 - File2_2010" Retrieved from "http://en.openei.org/w/index.php?title=H-D_Electric_Coop_Inc_(Minnesota)&oldid=412604" Categories: EIA Utility Companies and Aliases Utility Companies Organizations Stubs What links here Related changes Special pages Printable version Permanent link

74

Modelling the Corona of HD 189733 in 3D  

E-Print Network [OSTI]

The braking of main sequence stars originates mainly from their stellar wind. The efficiency of this angular momentum extraction depends on the rotation rate of the star, the acceleration profile of the wind and the coronal magnetic field. The derivation of scaling laws parametrizing the stellar wind torque is important for our understanding of gyro-chronology and the evolution of the rotation rates of stars. In order to understand the impact of complex magnetic topologies on the stellar wind torque, we present three- dimensional, dynamical simulations of the corona of HD 189733. Using the observed complex topology of the magnetic field, we estimate how the torque associated with the wind scales with model parameters and compare those trends to previously published scaling laws.

Strugarek, Antoine; Matt, Sean P; Réville, Victor; Donati, Jean-François; Moutou, Claire; Fares, Rim

2014-01-01T23:59:59.000Z

75

Coherent Control of Resonance-Mediated Reactions: F+HD  

Science Journals Connector (OSTI)

Cross sections resulting from scattering that proceeds via an intermediate resonance are shown to be exceptionally controllable using a coherent superposition of only two initial states. Full quantum computations on F+HD(v=0;j=0,1)?H+DF, D+HF, which exhibits a resonance in one of the reactive channels, support the formal arguments, showing that control is indeed vast. In this case the ratio of reactive integral cross sections can be altered by a factor of 62 (compared to a noncoherent factor of only 3.3), while the ratio of reactive differential cross sections can be altered by a factor of over 6000 (compared to a noncoherent factor of less than 7). These results constitute the first prediction of extensive quantum control in a collisional process.

Vlado Zeman; Moshe Shapiro; Paul Brumer

2004-04-02T23:59:59.000Z

76

Low-temperature heat capacity of solid HD  

Science Journals Connector (OSTI)

The heat capacity at the saturated vapor pressure C s has been measured for a single sample of solid HD over the temperature range 0.4 to 8 K for various concentrations of J=1 impurities of H2 and D2. The variation in J=1 concentration in the sample was due to conversion to the J=0 rotational ground state over a period of time of approximately one month. In the limit of zero J=1 concentration, C s fitted a T3 dependence characterized by a Debye temperature of 101 K. An analysis is given of the contribution to the heat capacity from electric quadrupole-quadrupole pair interactions of the J=1 impurities in the solid.

J. H. Constable; A. Q. McGee; J. R. Gaines

1975-04-15T23:59:59.000Z

77

E-Print Network 3.0 - ap star hd Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

search results for: ap star hd Page: << < 1 2 3 4 5 > >> 1 arXiv:astroph0405348 Astronomy & Astrophysics manuscript no. OstarsCat October 21, 2004 Summary: of the field O...

78

THE TRANSIT LIGHT CURVE PROJECT. X. A CHRISTMAS TRANSIT OF HD 17156b  

E-Print Network [OSTI]

Photometry is presented of the 2007 December 25 transit of HD 17156b, which has the longest orbital period and highest orbital eccentricity of all the known transiting exoplanets. New measurements of the stellar radial ...

Winn, Joshua Nathan

79

NEAR-INFRARED TRANSIT PHOTOMETRY OF THE EXOPLANET HD 149026b  

E-Print Network [OSTI]

The transiting exoplanet HD 149026b is an important case for theories of planet formation and planetary structure, for the planet's relatively small size has been interpreted as evidence for a highly metal-enriched ...

Carter, Joshua Adam

80

Intracollisional Interference in the Spectrum of HD Mixed with Rare Gases  

Science Journals Connector (OSTI)

We present the first observation and interpretation of an interference effect in the infrared absorption spectrum of HD-rare-gas mixtures. This effect, due to constructive or destructive interference between allowed and collision-induced dipoles during a collision, is referred to as "intracollisional interference." Is is manifested by the appearance of a narrow line at the R1(1) position which increases with rare-gas density. This interference has relevance to the determination of HD abundance in planetary atmospheres.

J. D. Poll; R. H. Tipping; R. D. G. Prasad; S. Paddi Reddy

1976-02-02T23:59:59.000Z

Note: This page contains sample records for the topic "hd ngv potential" 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

Thermal H/D exchange in polar ice - deuteron scrambling in space  

E-Print Network [OSTI]

We have investigated the thermally induced proton/deuteron exchange in mixed amorphous H$_2$O:D$_2$O ices by monitoring the change in intensity of characteristic vibrational bending modes of H$_2$O, HDO, and D$_2$O with time and as function of temperature. The experiments have been performed using an ultra-high vacuum setup equipped with an infrared spectrometer that is used to investigate the spectral evolution of homogeneously mixed ice upon co-deposition in thin films, for temperatures in the 90 to 140 K domain. With this non-energetic detection method we find a significantly lower activation energy for H/D exchange -- $3840 \\pm 125$ K -- than previously reported. Very likely this is due to the amorphous nature of the interstellar ice analogues involved. This provides reactive timescales ($\\tau70$ K) fast enough for the process to be important in interstellar environments. Consequently, an astronomical detection of D$_2$O will be even more challenging because of its potential to react with H$_2$O to form H...

Lamberts, Thanja; Cuppen, Herma; Fedoseev, Gleb; Linnartz, Harold

2015-01-01T23:59:59.000Z

82

Limits on the Boron Isotopic Ratio in HD 76932  

E-Print Network [OSTI]

Data in the 2090 A B region of HD 76932 have been obtained at high S/N using the HST GHRS echelle at a resolution of 90,000. This wavelength region has been previously identified as a likely candidate for observing the B11/B10 isotopic splitting. The observations do not match a calculated line profile extremely well at any abundance for any isotopic ratio. If the B abundance previously determined from observations at 2500 A is assumed, the calculated line profile is too weak, indicating a possible blending line. Assuming that the absorption at 2090 A is entirely due to boron, the best-fit total B abundance is higher than but consistent with that obtained at 2500 A, and the best-fit isotopic ratio (B11/B10) is in the range ~10:1 to ~4:1. If the absorption is not entirely due to B and there is an unknown blend, the best-fit isotopic ratio may be closer to 1:1. Future observations of a similar metal-poor star known to have unusually low B should allow us to distinguish between these two possibilities. The constr...

Rebull, L M; Johansson, S; Thorburn, J; Fields, B

1998-01-01T23:59:59.000Z

83

Ground-based NIR emission spectroscopy of HD189733b  

E-Print Network [OSTI]

Spectroscopic observations of transiting exoplanets are providing an unprecedented view of the atmospheres of planets around nearby stars. As we learn more about the atmospheres of these remote bodies, we begin to build up a clearer picture of their composition and thermal structure. Here we investigate the case of K and L band emissions of the hot-Jupiter HD 189733b. Using the SpeX instrument on the NASA IRTF, we obtained three nights of secondary eclipse data using equivalent settings for all nights. Our sample includes one night previously presented by Swain et al. (2010) which allows for comparability of results. In this publication we present and discuss in detail a greatly improved data-reduction and analysis routine. This, in conjunction with more data, allows us to increase the spectral resolution of our planetary spectrum (R ~ 170-180), leading to a better identifiability of the features present. We confirm the existence of a strong emission at ~3.3 microns which is inconsistent with LTE simulations ...

Waldmann, I P; Tinetti, G; Griffith, C A; Swain, M R; Deroo, P

2011-01-01T23:59:59.000Z

84

Electron-Coupled Interaction between Nuclear Spins in HD Molecule  

Science Journals Connector (OSTI)

Electron-coupled interaction between two nuclear spins IA and IB is of the form h?ABIA·IB. In this paper, formulas for calculating ?AB are derived by using the variational method. By using these formulas, we have calculated ?AB of the HD molecule at internuclear distances of 1.3, 1.4, and 1.5 atomic units. The total wave function was chosen as a linear combination of seven independent functions of ?g1+ symmetry, representing the unperturbed state, and several additional functions, to represent the perturbation. The average value of ?AB over the zero-point vibration, ??AB?00, is found to be 37.138 cps. Further, the refinement of a part of the calculations is undertaken by use of the 11-term James and Coolidge wave function. The final result is ??AB?00=35.217 cps. The agreement with the observed value of 42.7±0.7 cps is satisfactory, considering that we have used only a few terms for the additional perturbative wave function and that the result is a sum of terms which cancel each other appreciably. Contributions from each perturbing Hamiltonian and also from a set of wave functions with different symmetry character were obtained separately. The various results are presented and discussed.

Eiichi Ishiguro

1958-07-01T23:59:59.000Z

85

The CORALIE survey for southern extra-solar planets VII. Two short-period Saturnian companions to HD108147 and HD168746  

E-Print Network [OSTI]

We present the discovery of two Saturn-mass companions to HD108147 and HD168746. Both belong to the lightest ever discovered planets. The minimum mass of the companion to HD168746 is of only 0.77 the mass of Saturn and its orbital period is 6.4 days. The companion to HD108147 orbits its parent star in 10.9 days and its minimum mass is 1.34 that of Saturn. Its orbit is characterized by a high eccentricity, e=0.50, indicating possibly the presence of a second companion. The detection of Saturn-mass planets by means of the Doppler technique demands high radial-velocity measurement precision. The two new candidates were discovered by means of the CORALIE echelle spectrograph. The instrumental accuracy of CORALIE combined with the simultaneous ThAr-reference technique has reached a level better than 3m/s. On many observed objects the precision is now limited by photon noise. We present in this paper the weighted cross-correlation technique, which leads to an improvement in the photon noise of the computed radial velocity. We discuss as well a modification of the numerical cross-correlation mask which reduces significantly the residual perturbation effects produced by telluric absorption lines.

F. Pepe; M. Mayor; F. Galland; D. Naef; D. Queloz; N. C. Santos; S. Udry; M. Burnet

2002-02-25T23:59:59.000Z

86

Atomic and molecular interstellar absorption lines toward the high galactic latitude stars HD~141569 and HD~157841 at ultra-high resolution  

E-Print Network [OSTI]

We present ultra-high resolution (0.32 km/s) spectra obtained with the 3.9m Anglo-Australian Telescope (AAT) and Ultra-High-Resolution Facility (UHRF), of interstellar NaI D1, D2, Ca II K, K I and CH absorption toward two high galactic latitude stars HD141569 and HD157841. We have compared our data with 21-cm observations obtained from the Leiden/Dwingeloo HI survey. We derive the velocity structure, column densities of the clouds represented by the various components and identify the clouds with ISM structures seen in the region at other wavelengths. We further derive abundances, linear depletions and H2 fractional abundances for these clouds, wherever possible. Toward HD141569, we detect two components in our UHRF spectra : a weak, broad component at - 15 km/s, seen only in CaII K absorption and another component at 0 km/s, seen in NaI D1, D2, Ca II K, KI and CH absorption. In the case of the HD157841 sightline, a total of 6 components are seen on our UHRF spectra in NaI D1, D2 Ca II K, K I and CH absorption. 2 of these 6 components are seen only in a single species.

M. S. Sahu; J. C. Blades; L. He; D. Hartmann; M. J. Barlow; I. A. Crawford

1998-03-31T23:59:59.000Z

87

The CORALIE survey for southern extra-solar planets XV. Discovery of two eccentric planets orbiting HD4113 and HD156846  

E-Print Network [OSTI]

We report the detection of two very eccentric planets orbiting HD4113 and HD156846 with the CORALIE Echelle spectrograph mounted on the 1.2-m Euler Swiss telescope at La Silla. The first planet, HD4113b, has minimum mass of $m\\sin{i}=1.6\\pm0.2 M_{\\rm Jup}$, a period of $P=526.59\\pm0.21$ days and an eccentricity of $e=0.903\\pm0.02$. It orbits a metal rich G5V star at $a=1.28$ AU which displays an additional radial velocity drift of 28 m s$^{-1}$/yr observed during 8 years. The combination of the radial-velocity data and the non-detection of any main sequence stellar companion in our high contrast images taken at the VLT with NACO/SDI, characterizes the companion as a probable brown dwarf or as a faint white dwarf. The second planet, \\object{HD 156846 b}, has minimum mass of $m\\sin{i}=10.45\\pm0.05$ M$_{\\rm Jup}$, a period of $P=359.51\\pm0.09 $ days, an eccentricity of $e=0.847\\pm0.002$ and is located at $a=1.0$ AU from its parent star. HD156846 is a metal rich G0 dwarf and is also the primary of a wide binary system ($a>250$ AU, $P>4000$ years). Its stellar companion, \\object{IDS 17147-1914 B}, is a M4 dwarf. The very high eccentricities of both planets can be explained by Kozai oscillations induced by the presence of a third object.

O. Tamuz; D. Ségransan; S. Udry; M. Mayor; A. Eggenberger; D. Naef; F. Pepe; D. Queloz; N. C. Santos; B. -O. Demory; P. Figuera; M. Marmier; G. Montagnier

2007-10-26T23:59:59.000Z

88

Low-Temperature Heat Transport in Solid HD  

Science Journals Connector (OSTI)

The thermal conductivity of solid HD has been measured and compared with theory over the temperature range 4-0.2 K. Since the sample remained frozen over the entire period in which the measurements were made, the H2 and D2 impurities, as well as the other crystal defects, were assumed fixed in the lattice. However, the concentration of the J=1 orthohydrogen (o-H2) and paradeuterium impurities in the sample changed through the slow J=1 to J=0 conversion taking place in the solid. The rate of conversion and consequently the J=1 concentration was determined by measuring, as a function of time, the heat of conversion resulting from J=1 to J=0 transitions. Because of the variation in the J=1 concentration, it was possible to separate the thermal resistivity into a (J=1)-dependent part and a part independent of J=1 concentration. The resistivity resulting from phonon scattering by J=1 molecules was compared to existing theory for two-phonon Raman scattering by o-H2 molecules in a parahydrogen solid. At the lowest temperatures, the temperature dependence of this resistivity was too large to be accounted for by a two-phonon process. It is suggested that a one-phonon process is responsible for the increase in the resistivity at low temperatures. The results of a calculation are given to demonstrate the palusibility of this argument. Below 1 K, the (J=1)-independent conductivity can be adequately fitted by a T3 temperature dependence. From this dependence it was inferred that the sample was polycrystalline. Above 1 K, the (J=1)-independent conductivity is dominated by the presence of the H2 and D2 isotopic impurities. The techniques used to measure these impurity concentrations are described in detail.

J. H. Constable and J. R. Gaines

1973-10-15T23:59:59.000Z

89

Temperature dependence of the pure rotational band of HD: Interference, widths, and shifts  

Science Journals Connector (OSTI)

The far-infrared pure rotational absorption spectra of gaseous HD and HD-X (X=H2, He, Ne, Ar, Kr, and N2) were measured at 195 and 296 K. Values of the allowed dipole-moment matrix elements, the absolute frequencies, the spectral-line-shape parameters (broadening and frequency-shift coefficients), and the interference parameters, for the first four rotational lines, were deduced from the spectra. Theoretical calculations of the interference parameter a and the linewidths were performed, based, respectively, on the theory developed by Herman, Tipping, and Poll [Phys. Rev. A 20, 2006 (1979)] and a semiclassical theory developed by Robert and Bonamy [D. Robert and J. Bonamy, J. Phys. 40, 923 (1979)]. The induced dipole moments for HD-Ne and HD-N2 were estimated. The analysis includes the present experimental results, together with previous determinations at 77 and 296 K [L. Ulivi, Z. Lu, and G. C. Tabisz, Phys. Rev. A 40, 642 (1989); P. Drakopoulos and G. C. Tabisz, ibid. $bold 36 —, 5556 (1987)]. The behavior of the temperature dependence of the collisional interference in the pure rotational band for HD and its mixtures is confirmed to be more complicated than predictions of the intracollisional theory.

Z. Lu; G. C. Tabisz; L. Ulivi

1993-02-01T23:59:59.000Z

90

Lithium and magnetic fields in giants. HD 232862 : a magnetic and lithium-rich giant star  

E-Print Network [OSTI]

We report the detection of an unusually high lithium content in HD 232862, a field giant classified as a G8II star, and hosting a magnetic field. With the spectropolarimeters ESPaDOnS at CFHT and NARVAL at TBL, we have collected high resolution and high signal-to-noise spectra of three giants : HD 232862, KU Peg and HD 21018. From spectral synthesis we have inferred stellar parameters and measured lithium abundances that we have compared to predictions from evolutionary models. We have also analysed Stokes V signatures, looking for a magnetic field on these giants. HD 232862, presents a very high abundance of lithium (ALi = 2.45 +/- 0.25 dex), far in excess of the theoretically value expected at this spectral type and for this luminosity class (i.e, G8II). The evolutionary stage of HD 232862 has been precised, and it suggests a mass in the lower part of the [1.0 Msun ; 3.5 Msun ] mass interval, likely 1.5 to 2.0 solar mass, at the bottom of the Red Giant Branch. Besides, a time variable Stokes V signature has...

Lèbre, A; Nascimento, J D do; Konstantinova-Antova, R; Kolev, D; Aurière, M; De Laverny, P; De Medeiros, J R

2009-01-01T23:59:59.000Z

91

H.D. Cochran, Questions for the Workshop | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

H.D. Cochran, H.D. Cochran, Questions for the Workshop Chemical Sciences, Geosciences, & Biosciences (CSGB) Division CSGB Home About Research Areas Scientific Highlights Reports & Activities Principal Investigators' Meetings BES Home Third DOE BES Separations Research Workshop H.D. Cochran, Questions for the Workshop Print Text Size: A A A RSS Feeds FeedbackShare Page Third DOE/Basic Energy Sciences Separations Research Workshop Savannah DeSoto Hilton, Savannah, Georgia May 12-14, 1999 Questions for the Workshop H. D. Cochran Oak Ridge National Laboratory Dr. Cochran took the approach of asking questions of the audience that would stimulate discussion amongst the members of the workshop. The following are the results of some of the discussion that ensued. Nanoscience: When alluding to nanoscience, new DOE initiatives seem to be

92

A portable cryostat for the cold transfer of polarized solid HD targets: HDice-I  

SciTech Connect (OSTI)

A device has been developed with moveable liquid nitrogen and liquid helium volumes that is capable of reaching over two meters into the coldest regions of a cryostat or dilution refrigerator and reliably extracting or installing a target of solid, polarized hydrogen deuteride (HD). This Transfer Cryostat incorporates a cylindrical neodymium rare-earth magnet that is configured as a Halbach dipole, which is maintained at 77 K and produces a 0.1 T field around the HD target. Multiple layers provide a hermetic 77 K-shield as the device is used to maintain a target at 2 K during a transfer between cryostats. Tests with frozen-spin HD show negligible polarization loss for either H or D over typical transfer periods. Multiple target transfers with this apparatus have shown an overall reliability of about 95% per transfer, which is a significant improvement over earlier versions of the device.

Bass, Christopher D. [JLAB, Newport News, VA (United States); Sandorfi, Andy M. [JLAB, Newport News, VA (United States); Bade, C.; Blecher, M.; Caracappa, A.; D'Angelo, A.; Deur, A.; Dezern, G.; Glueckler, H.; Hanretty, C.; Ho, D.; Kageya, T.; Khandaker, M.; Laine, V.; Lincoln, F.; Lowry, M. M.; Mahon, J. C.; Connell, T. O.; Peng, P.; Preedom, B.; Seyfarth, H.; Stroeher, H.; Thorn, C. E.; Wei, X.; Whisnant, C. S.

2014-02-01T23:59:59.000Z

93

HD as a Probe for Detecting Mass Variation on a Cosmological Time Scale  

Science Journals Connector (OSTI)

The strong electronic absorption systems of the B?u+1-X?g+1 Lyman and the C?u1-X?g+1 Werner bands can be used to probe possible mass-variation effects on a cosmological time scale from spectra observed at high redshift, not only in H2 but also in the second most abundant hydrogen isotopomer HD. High resolution laboratory determination of the most prominent HD lines at extreme ultraviolet wavelengths is performed at an accuracy of ??/??5×10-8, forming a database for comparison with astrophysical data. Sensitivity coefficients Ki=dln??i/dln?? are determined for HD from quantum ab initio calculations as a function of the proton-electron mass ratio ?. Strategies to deduce possible effects beyond first-order baryon/lepton mass ratio deviations are discussed.

T. I. Ivanov; M. Roudjane; M. O. Vieitez; C. A. de Lange; W.-Ü L. Tchang-Brillet; W. Ubachs

2008-03-07T23:59:59.000Z

94

Nuclear spin-lattice relaxation of HD impurities in solid hydrogen  

Science Journals Connector (OSTI)

We report detailed calculations of the nuclear spin-lattice relaxation of isotopic impurities (HD) in solid hydrogen. Experimentally, a temperature-independent relaxation is observed at low temperatures and is attributed to quantum tunneling of HD impurities. The pronounced minimum observed at intermediate temperatures is associated with the interruption of quantum tunneling by scattering from thermally excited vacancies. The theoretical calculations are compared with recent experimental measurements and provide a severe test of the microscopic model for the motion of point defects in quantum crystals.

Erika G. Kisvarsanyi and N. S. Sullivan

1992-08-01T23:59:59.000Z

95

FURTHER EVIDENCE OF THE PLANETARY NATURE OF HD 95086 b FROM GEMINI/NICI H-BAND DATA  

SciTech Connect (OSTI)

We present our analysis of the Gemini/NICI H-band data of HD 95086, following the discovery of the planet HD 95086 b in L'. The H-band data reach a contrast of 12.7 mag relative to the host star at 5? levels in the location of HD 95086 b, and no point source is found. Our non-detection and H – L' color limit rules out the possibility that the object is a foreground L/T dwarf and that, if it is bound to HD 95086, it is a genuine planetary mass object. We estimate a new pre-main-sequence isochronal age for HD 95086 of 17 ± 4 Myr, which is commensurate with previous mean age estimates for the Lower Cen-Crux subgroup. Adopting an age of 17 Myr, the color limit is inconsistent with the COND model, marginally consistent with the BT-SETTL model, and consistent with the DUSTY model.

Meshkat, T.; Kenworthy, M. [Sterrewacht Leiden, P.O. Box 9513, Niels Bohrweg 2, 2300 RA Leiden (Netherlands)] [Sterrewacht Leiden, P.O. Box 9513, Niels Bohrweg 2, 2300 RA Leiden (Netherlands); Bailey, V.; Su, K. Y. L. [Steward Observatory, Department of Astronomy, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721-0065 (United States)] [Steward Observatory, Department of Astronomy, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721-0065 (United States); Rameau, J.; Chauvin, G.; Lagrange, A.-M. [UJF-Grenoble 1/CNRS-INSU, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG) UMR 5274, Grenoble, F-38041 (France)] [UJF-Grenoble 1/CNRS-INSU, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG) UMR 5274, Grenoble, F-38041 (France); Bonnefoy, M. [Max Planck Institute für Astronomy, Königsthul 17, D-69117 Heidelberg (Germany)] [Max Planck Institute für Astronomy, Königsthul 17, D-69117 Heidelberg (Germany); Boccaletti, A. [LESIA, Observatoire de Paris, CNRS, University Pierre et Marie Curie Paris 6 and University Denis Diderot Paris 7, 5 place Jules Janssen, F-92195 Meudon (France)] [LESIA, Observatoire de Paris, CNRS, University Pierre et Marie Curie Paris 6 and University Denis Diderot Paris 7, 5 place Jules Janssen, F-92195 Meudon (France); Mamajek, E. E. [Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627-0171 (United States)] [Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627-0171 (United States); Currie, T. [Department of Astronomy and Astrophysics, University of Toronto, 50 St. George St., Toronto, Ontario, M5S 1A1 (Canada)] [Department of Astronomy and Astrophysics, University of Toronto, 50 St. George St., Toronto, Ontario, M5S 1A1 (Canada)

2013-10-01T23:59:59.000Z

96

Measurement of the cross section for HD2\\HD,,v 3,j 0...D as a function of angle and energy  

E-Print Network [OSTI]

Measurement of the cross section for H¿D2\\HD,,v �3,j �0...¿D as a function of angle and energy is measured as a function of angle and collision energy from 1.39 to 1.85 eV. The plot of the cross section vs in the integral cross section ICS , which varies less than 25% over the energy range measured. Comparisons

Zare, Richard N.

97

Magnetic moment and plasma environment of HD 209458b as determined from Ly? observations  

Science Journals Connector (OSTI)

...We assume the atmosphere of HD 209458b...consistent with atmospheric models...by the shaded area. One can...shows the thermal atmospheric atoms. Fig...the estimated plasma parameters are from the...209458b at 150 MHz (19). Proximity...not support a larger magnetic moment that exceeds...

Kristina G. Kislyakova; Mats Holmström; Helmut Lammer; Petra Odert; Maxim L. Khodachenko

2014-11-21T23:59:59.000Z

98

Dense molecular globulettes and the dust arc towards the runaway O star AE Aur (HD 34078)  

E-Print Network [OSTI]

Some runaway stars are known to display IR arc-like structures around them, resulting from their interaction with surrounding interstellar material. The properties of these features as well as the processes involved in their formation are still poorly understood. We aim at understanding the physical mechanisms that shapes the dust arc observed near the runaway O star AEAur (HD34078). We obtained and analyzed a high spatial resolution map of the CO(1-0) emission that is centered on HD34078, and that combines data from both the IRAM interferometer and 30m single-dish antenna. The line of sight towards HD34078 intersects the outer part of one of the detected globulettes, which accounts for both the properties of diffuse UV light observed in the field and the numerous molecular absorption lines detected in HD34078's spectra, including those from highly excited H2 . Their modeled distance from the star is compatible with the fact that they lie on the 3D paraboloid which fits the arc detected in the 24 {\\mu}m Spitz...

Gratier, P; Boissé, P; Cabrit, S; Lesaffre, P; Gerin, M; Forêts, G Pineau des

2014-01-01T23:59:59.000Z

99

Modeling of a Solar Driven HD (Humidification-Dehumidification) Desalination System  

Science Journals Connector (OSTI)

Abstract The paper presents a computer code developed to simulate the operation of a low-temperature thermally driven desalination system, based on the HD process. The system is a closed air cycle unit and is based on a single-effect humidification/dehumidification technique: heated salt water is introduced into an humidifier to saturate the circulating air and then the water vapor separates in a condensation section, where fresh water production takes place. The modeling procedure allows to investigates the air and water thermodynamic properties across each component. The computer code is able to optimize the heat exchanger surfaces and the air and water mass flow rates, depending on the sea water and the heat source temperature levels. The code was used to analyze an HD desalination unit with fresh water production of about 200 liters per hour, for two different configurations: a direct solar driven scheme, where the salt water entering the HD unit is heated by a solar collector field, and an integrated cooling-desalination system driven by solar energy, where the solar collected heat is used to drive a LiBr absorption machine and then the low-temperature heat rejected by the chiller is exploited to drive the HD process. The simulation code has been integrated into the Trnsys environment to perform a transient simulation of the whole systems. The annual simulations have been carried out on an hourly basis for typical climatic conditions of Abu Dhabi (UAE).

Giuseppe Franchini; Antonio Perdichizzi

2014-01-01T23:59:59.000Z

100

HD 140283: A STAR IN THE SOLAR NEIGHBORHOOD THAT FORMED SHORTLY AFTER THE BIG BANG  

SciTech Connect (OSTI)

HD 140283 is an extremely metal-deficient and high-velocity subgiant in the solar neighborhood, having a location in the Hertzsprung-Russell diagram where absolute magnitude is most sensitive to stellar age. Because it is bright, nearby, unreddened, and has a well-determined chemical composition, this star avoids most of the issues involved in age determinations for globular clusters. Using the Fine Guidance Sensors on the Hubble Space Telescope, we have measured a trigonometric parallax of 17.15 {+-} 0.14 mas for HD 140283, with an error one-fifth of that determined by the Hipparcos mission. Employing modern theoretical isochrones, which include effects of helium diffusion, revised nuclear reaction rates, and enhanced oxygen abundance, we use the precise distance to infer an age of 14.46 {+-} 0.31 Gyr. The quoted error includes only the uncertainty in the parallax, and is for adopted surface oxygen and iron abundances of [O/H] = -1.67 and [Fe/H] = -2.40. Uncertainties in the stellar parameters and chemical composition, especially the oxygen content, now contribute more to the error budget for the age of HD 140283 than does its distance, increasing the total uncertainty to about {+-}0.8 Gyr. Within the errors, the age of HD 140283 does not conflict with the age of the Universe, 13.77 {+-} 0.06 Gyr, based on the microwave background and Hubble constant, but it must have formed soon after the big bang.

Bond, Howard E.; Nelan, Edmund P. [Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21218 (United States); VandenBerg, Don A. [Department of Physics and Astronomy, University of Victoria, P.O. Box 3055, Victoria, BC V8W 3P6 (Canada); Schaefer, Gail H. [The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, CA 91023 (United States); Harmer, Dianne, E-mail: bond@stsci.edu, E-mail: nelan@stsci.edu, E-mail: vandenbe@uvic.ca, E-mail: schaefer@chara-array.org, E-mail: diharmer@noao.edu [National Optical Astronomy Observatories, 950 North Cherry Avenue, Tucson, AZ 85726 (United States)

2013-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "hd ngv potential" 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

THE TRENDS HIGH-CONTRAST IMAGING SURVEY. III. A FAINT WHITE DWARF COMPANION ORBITING HD 114174  

SciTech Connect (OSTI)

The nearby Sun-like star HD 114174 exhibits a strong and persistent Doppler acceleration indicating the presence of an unseen distant companion. We have acquired high-contrast imaging observations of this star using NIRC2 at Keck and report the direct detection of the body responsible for causing the ''trend''. HD 114174 B has a projected separation of 692 {+-} 9 mas (18.1 AU) and is 10.75 {+-} 0.12 mag (contrast of 5 Multiplication-Sign 10{sup -5}) fainter than its host in the K-band, requiring aggressive point-spread function subtraction to identify. Our astrometric time baseline of 1.4 yr demonstrates physical association through common proper motion. We find that the companion has absolute magnitude, M{sub J} = 13.97 {+-} 0.11, and colors, J - K = 0.12 {+-} 0.16 mag. These characteristics are consistent with an Almost-Equal-To T3 dwarf, initially leading us to believe that HD 114174 B was a substellar object. However, a dynamical analysis that combines radial velocity measurements with available imaging data indicates a minimum mass of 0.260 {+-} 0.010 M{sub Sun }. We conclude that HD 114174 B must be a white dwarf. Assuming a hydrogen-rich composition, atmospheric and evolutionary model fits yield an effective temperature T{sub eff} = 8200 {+-} 4000 K, surface gravity log g = 8.90 {+-} 0.02, and cooling age of t{sub c} Almost-Equal-To 3.4 Gyr, which is consistent with the 4.7{sup +2.3}{sub -2.6} Gyr host star isochronal age estimate. HD 114174 B is a benchmark object located only 26.14 {+-} 0.37 pc from the Sun. It may be studied at a level of detail comparable to Sirius and Procyon, and used to understand the link between the mass of white dwarf remnants with that of their progenitors.

Crepp, Justin R. [Department of Physics, University of Notre Dame, 225 Nieuwland Science Hall, Notre Dame, IN 46556 (United States); Johnson, John Asher [Department of Planetary Science, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125 (United States); Howard, Andrew W. [Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States); Marcy, Geoffrey W. [Department of Astronomy, University of California, Berkeley, CA 94720 (United States); Gianninas, Alexandros; Kilic, Mukremin [Department of Physics and Astronomy, University of Oklahoma, Norman, OK 73019 (United States); Wright, Jason T., E-mail: jcrepp@nd.edu [Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802 (United States)

2013-09-01T23:59:59.000Z

102

Absorption intensities of the multipole-field-induced zero-phonon transitions in solid HD, HT, and DT  

Science Journals Connector (OSTI)

Closed-form theoretical expressions are derived for the integrated absorption coefficient of various zero-phonon single and double transitions in heteronuclear isotopic variants of hydrogen in condensed phase. Theoretical analysis predicts a different kind of double transition in the spectra of solid HD, HT, and DT, where the rotational energy of one molecule changes by three quanta and the rotational energy of another molecule simultaneously changes by at least three quanta. The expressions for double transitions given in this paper may, for example, be applied to double transitions involving para-H2–HD or ortho-D2–HD pairs.

Adya P. Mishra; Robert W. Field; S. V. N. Bhaskara Rao; Richard D’Souza; T. K. Balasubramanian

2003-04-23T23:59:59.000Z

103

HD gas purification for polarized HDice targets production at Jefferson Lab  

SciTech Connect (OSTI)

Solid, frozen-spin targets of molecular HD were #12;rst developed for nuclear physics by a collaboration between Syracuse University and Brookhaven National Lab. They have been successfully used in measurements with photon beams, #12;rst at the Laser-Electron-Gamma-Source [1] and most recently at Je#11;erson Lab during the running of the E06-101 (g14) experiment [2]. Preparations are underway to utilize the targets in future electron experiments after the completion of the 12 GeV JLab upgrade [3]. HD is an attractive target since all of the material is polarizable, of low Z, and requires only modest holding #12;elds. At the same time, the small contributions from the target cell can be subtracted from direct measurements. Reaching the frozen-spin state with both high polarization and a signi#12;cant spin relaxation time requires careful control of H2 and D2 impurities. Commercially available HD contains 0.5 - 2% concentrations of H2 and D2. Low-temperature distillation is required to reduce these concentrations to the 10􀀀4 level to enable useful target production. This distillation is done using a column #12;lled with heli-pack C [4] to give good separation e#14;ciency. Approximately 12 moles of commercial HD is condensed into the mechanically refrigerated system at the base temperature of 11K. The system is then isolated and the temperature stabilized at 18K producing liquid HD, which is boiled by a resistive heater. The circulation established by the boil-o#11; condensing throughout the column then #12;ltering back down produces a steady-state isotopic separation permitting the extraction of HD gas with very low H2 and D2 content. A residual gas analyzer initially monitors distillation. Once the H2 concentration falls below its useful operating range, samples are periodically collected for analysis using gas chromatography [5] and Raman scattering. Where the measurement techniques overlap, good agreement is obtained. The operation of the distillery and results of gas analysis will be discussed. References [1] Phy. Rev. Lett. 101 (2009) 172002. [2] www.jlab.org/exp_prog/proposals/06/PR-06-101.pdf [3] www.jlab.org/exp_prog/proposals/12/PR12-12-009.pdf, www.jlab.org/exp_prog/proposals/12/PR12-12-010.pdf, and www.jlab.org/exp_prog/proposals/11/PR12-11-111.pdf [4] Nucl. Inst. Meth. 664 (2012) 347, www.wilmad-labglass.com/Products/LG-6730-104/ [5] Rev. Sci. Instrum. 82, 024101 (2011).

Whisnant, Charles; D'Angelo, Annalisa; Colaneri, Luca; Devilbiss, J.; Kageya, Tsuneo; Loving, D.A.; Lowry, Michael; Rizzo, Alessandro; Sandorfi, Andrew; Schaerf, Carlo; Storey, J.D.; Wallace, C.M.; Wei, Xiangdong; Zonta, Irene

2014-06-01T23:59:59.000Z

104

Determination of the binding energies of the np Rydberg states of H{sub 2}, HD, and D{sub 2} from high-resolution spectroscopic data by multichannel quantum-defect theory  

SciTech Connect (OSTI)

Multichannel quantum-defect theory (MQDT) is used to calculate the electron binding energies of np Rydberg states of H{sub 2}, HD, and D{sub 2} around n = 60 at an accuracy of better than 0.5?MHz. The theory includes the effects of rovibronic channel interactions and the hyperfine structure, and has been extended to the calculation of the asymmetric hyperfine structure of Rydberg states of a heteronuclear diatomic molecule (HD). Starting values for the eigenquantum-defect parameters of MQDT were extracted from ab initio potential-energy functions for the low-lying p Rydberg states of molecular hydrogen and subsequently refined in a global weighted fit to available experimental data on the singlet and triplet Rydberg states of H{sub 2} and D{sub 2}. The electron binding energies of high-np Rydberg states derived in this work represent important quantities for future determinations of the adiabatic ionization energies of H{sub 2}, HD, and D{sub 2} at sub-MHz accuracy.

Sprecher, Daniel; Merkt, Frédéric, E-mail: frederic.merkt@phys.chem.ethz.ch [Laboratorium für Physikalische Chemie, ETH-Zürich, 8093 Zürich (Switzerland)] [Laboratorium für Physikalische Chemie, ETH-Zürich, 8093 Zürich (Switzerland); Jungen, Christian [Laboratoire Aimé Cotton du CNRS, Université de Paris-Sud, 91405 Orsay (France)] [Laboratoire Aimé Cotton du CNRS, Université de Paris-Sud, 91405 Orsay (France)

2014-03-14T23:59:59.000Z

105

On-Road Particle Matter Emissions from a MY 2010 Compliant HD Diesel Vehicle Driving Across the U.S.  

Broader source: Energy.gov [DOE]

Measuring particle emissions from a 2010 compliant HD Diesel tractor while traveling on-road for 2300 miles found average gravimetric TPM over the entire route to be well below EPA's 2010 PM standard.

106

Measurements of spin observables in pseudo-scalar meson photo-production using polarized neutrons in solid HD  

SciTech Connect (OSTI)

A measurement of psuedo-scalar meson photo production from longitudinally polarized solid HD has been carried out with the CLAS at Thomas Jefferson National Accelerator Facility (Jlab) with circularly and linearly polarized photon beams. Its aim is to measure a complete set of spin observables for the neutron simultaneously from the same experiment. As a polarized neutron, deutron in HD was used. Preliminary asymmetries are shown for the {pi}{sup -} channel.

Kageya, Tsuneo [JLAB, Newport News, VA (United States)

2014-01-01T23:59:59.000Z

107

Far-infrared rotational spectrum of HD: Line shape, dipole moment, and collisional interference  

Science Journals Connector (OSTI)

The rotational transitions R(0) to R(3) in pure HD gas have been studied in absorption with 0.06-cm-1 resolution at densities from 2 to 68 amagat at 295 K. The permanent dipole moment of HD was found to be 8.83(28), 7.94(2), 7.88(3), and 8.43(10) for R(0) to R(3), respectively, in units of 10-4 D. These are in general agreement with ab initio calculations except for an unpredicted strong rotational state dependence. Collisional interference was observed and the interference parameter, proportional to the ratio of the average induced dipole moment to the allowed moment, is negative for R(0) and R(1), positive for R(2) and R(3), and of a magnitude consistent with calculation. Comparisons are made with earlier work, particularly that of McKellar [Can. J. Phys. 64, 227 (1986)].

P. G. Drakopoulos and G. C. Tabisz

1987-12-15T23:59:59.000Z

108

HD 51844: An Am delta Scuti in a binary showing periastron brightening  

E-Print Network [OSTI]

Pulsating stars in binary systems are ideal laboratories to test stellar evolution and pulsation theory, since a direct, model-independent determination of component masses is possible. The high-precision CoRoT photometry allows a detailed view of the frequency content of pulsating stars, enabling detection of patterns in their distribution. The object HD 51844 is such a case showing periastron brightening instead of eclipses. We present a comprehensive study of the HD 51844 system, where we derive physical parameters of both components, the pulsation content and frequency patterns. Additionally, we obtain the orbital elements, including masses, and the chemical composition of the stars. Time series analysis using standard tools was mployed to extract the pulsation frequencies. Photospheric abundances of 21 chemical elements were derived by means of spectrum synthesis. We derived orbital elements both by fitting the observed radial velocities and the light curves, and we did asteroseismic modelling as well. W...

Hareter, M; Weiss, W W; Hernández, A García; Borkovits, T; Lampens, P; Rainer, M; De Cat, P; Marcos-Arenal, P; Vos, J; Poretti, E; Baglin, A; Michel, E; Baudin, F; Catala, C

2014-01-01T23:59:59.000Z

109

Investigating the pre-main sequence magnetic chemically peculiar system HD 72106  

E-Print Network [OSTI]

The origin of the strong magnetic fields observed in chemically peculiar Ap and Bp stars stars has long been debated. The recent discovery of magnetic fields in the intermediate mass pre-main sequence Herbig Ae and Be stars links them to Ap and Bp stars, providing vital clues about Ap and Bp stars and the origin and evolution of magnetic fields in intermediate and high mass stars. A detailed study of one young magnetic B star, HD 72106A, is presented. This star appears to be in a binary system with an apparently normal Herbig Ae star. A maximum longitudinal magnetic field strength of +391 +/- 65 G is found in HD 72106A, as are strong chemical peculiarities, with photospheric abundances of some elements ranging up to 100x above solar.

Folsom, C P; Hanes, D A; Catala, C; Alecian, E; Bagnulo, S; Böhm, T; Bouret, J C; Donati, J F; Landstreet, J D

2006-01-01T23:59:59.000Z

110

Study of HD 169392A observed by CoRoT and HARPS  

E-Print Network [OSTI]

The numerous results obtained with asteroseismology thanks to space missions such as CoRoT and Kepler are providing a new insight on stellar evolution. After five years of observations, CoRoT is going on providing high-quality data. We present here the analysis of the double star HD169392 complemented by ground-based spectroscopic observations. This work aims at characterizing the fundamental parameters of the two stars, their chemical composition, the acoustic-mode global parameters including their individual frequencies, and their dynamics. We have analysed HARPS observations of the two stars to retrieve their chemical compositions. Several methods have been used and compared to measure the global properties of acoustic modes and their individual frequencies from the photometric data of CoRoT. The new spectroscopic observations and archival astrometric values suggest that HD169392 is a wide binary system weakly bounded. We have obtained the spectroscopic parameters for both components, suggesting the origin...

Mathur, S; Catala, C; Benomar, O; Davies, G R; Garcia, R A; Salabert, D; Ballot, J; Mosser, B; Regulo, C; Chaplin, W J; Elsworth, Y; Handberg, R; Hekker, S; Mantegazza, L; Michel, E; Poretti, E; Rainer, M; Roxburgh, I W; Samadi, R; Steslicki, M; Uytterhoeven, K; Verner, G A; Auvergne, M; Baglin, A; Forteza, S Barcelo; Baudin, F; Cortes, T Roca

2012-01-01T23:59:59.000Z

111

Asteroseismic analysis of the CoRoT target HD 169392  

E-Print Network [OSTI]

The satellite CoRoT (Convection, Rotation, and planetary Transits) has provided high-quality data for almost six years. We show here the asteroseismic analysis and modeling of HD169392A, which belongs to a binary system weakly gravitationally bound as the distance between the two components is of 4250 AU. The main component, HD169392A, is a G0IV star with a magnitude of 7.50 while the second component is a G0V-G2IV star with a magnitude of 8.98. This analysis focuses on the main component, as the secondary one is too faint to measure any seismic parameters. A complete modeling has been possible thanks to the complementary spectroscopic observations from HARPS, providing Teff=5985+/-60K, log g=3.96+/-0.07, and [Fe/H]=- 0.04+/-0.10.

Mathur, S; Catala, C; Benomar, O; Davies, G R; Garcia, R A; Salabert, D; Ballot, J; Mosser, B; Regulo, C; Chaplin, W J; Elsworth, Y; Handberg, R; Hekker, S; Mantegazza, L; Michel, E; Poretti, E; Rainer, M; Roxburgh, I W; Samadi, R; Steslicki, M; Uytterhoeven, K; Verner, G A; Auvergne, M; Baglin, A; Forteza, S Barcelo; Baudin, F; Cortes, T Roca

2013-01-01T23:59:59.000Z

112

A Comprehensive Analysis of the Magnetic Standard Star HD 94660: Host of a Massive Compact Companion?  

E-Print Network [OSTI]

Detailed information about the magnetic geometry, atmospheric abundances and radial velocity variations has been obtained for the magnetic standard star HD 94660 based on high-dispersion spectroscopic and spectropolarimetric observations from the UVES, HARPSpol and ESPaDOnS instruments. We perform a detailed chemical abundance analysis using the spectrum synthesis code zeeman for a total of 17 elements. Using both line-of-sight and surface magnetic field measurements, we derive a simple magnetic field model that consists of dipole, quadrupole and octupole components. The observed magnetic field variations of HD 94660 are complex and suggest an inhomogeneous distribution of chemical elements over the stellar surface. This inhomogeneity is not reflected in the abundance analysis, from which all available spectra are modelled, but only a mean abundance is reported for each element. The derived abundances are mostly non-solar, with striking overabundances of Fe-peak and rare-earth elements. Of note are the clear ...

Bailey, J D; Landstreet, J D

2015-01-01T23:59:59.000Z

113

Role of the induced dipole moment in the collisional interference in the pure rotational spectrum of HD-He and HD-Ar  

Science Journals Connector (OSTI)

The parameters describing the interference between allowed and collision-induced transitions in the far-infrared spectrum of HD-He and HD-Ar are computed following the formalism of Gao et al. [Phys. Rev. A 44, 7379 (1991)] and the calculational procedure of Gao et al. [Phys. Rev. A 46, 5781 (1992)]. The contribution from each component of the induced-dipole moment is identified. The interference between the induced-dipole component having the same symmetry as the allowed moment and the allowed moment itself has the largest single contribution to the intensity interference effect. The mixing of rotational levels by an anisotropic intermolecular interaction introduces other components into the interference mechanism. The overall effect is usually to decrease the magnitude of the interference and to permit line broadening and asymmetry to occur. This interaction is most effective in causing the anisotropic overlap-induced pair dipole moment B2(21) to play a role in the interference mechanism. The effect of the isotropic overlap-induced dipole moment is usually negligible.

B. McQuarrie; G. C. Tabisz; B. Gao; J. Cooper

1995-09-01T23:59:59.000Z

114

New Spectroscopic Determination of the Dipole Moment of HD in the Ground Vibrational State  

Science Journals Connector (OSTI)

The intensity of the pure rotational spectrum of gaseous HD is measured as a function of density to determine the dipole moment in the ground vibrational state. J-dependent values are found in the range (8.0-9.8) × 10-4 D which, contrary to previous determinations of Trefler and Gush, agree reasonably with ab initio calculations. Intracollisional interference is taken into account and its J dependence determined.

J. Bradley Nelson and G. C. Tabisz

1982-05-17T23:59:59.000Z

115

Nuclear interference in dissociating of HD{sup +} in ultrashort laser fields  

SciTech Connect (OSTI)

The dissociation dynamics of HD{sup +} molecules is studied theoretically by numerically solving the time-dependent Schroedinger equation in which the molecular vibrational and rotational degrees of freedom are included. Based on the Born-Oppenheimer approximation, the ground 1s{sigma}{sub g} state and the excited 2p{sigma}{sub u} state are taken into account, corresponding to two dissociative channels HD{sup +}{yields}D + H{sup +} and HD{sup +}{yields}H + D{sup +}, respectively. Two dissociative nuclear wave packets overlap and interfere after excited by two ultrashort laser pulses. The interference patterns can be controlled by varying the laser parameters and the dissociation probabilities are demonstrated for different laser fields. The kinetic energy-dependent distributions of the fragments are calculated using an asymptotic-flow expression in the momentum space. The branching ratio D{sup +}/(H{sup +} + D{sup +}), as a function of the delay time and the relative phase between two laser pulses, is also discussed.

Yang Di [School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China); State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China); Cong Shulin [School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China)

2011-07-15T23:59:59.000Z

116

Seismic analysis of HD43587Aa, a solar-like oscillator in a multiple system  

E-Print Network [OSTI]

Context. The object HD 43587Aa is a G0V star observed during the 145-day LRa03 run of the COnvection, ROtation and planetary Transits space mission (CoRoT), for which complementary High Accuracy Radial velocity Planet Searcher (HARPS) spectra with S/N>300 were also obtained. Its visual magnitude is 5.71, and its effective temperature is close to 5950 K. It has a known companion in a highly eccentric orbit and is also coupled with two more distant companions. Aims. We undertake a preliminary investigation of the internal structure of HD 43587Aa. Methods. We carried out a seismic analysis of the star, using maximum likelihood estimators and Markov Chain Monte Carlo methods. Results. We established the first table of the eigenmode frequencies, widths, and heights for HD 43587Aa. The star appears to have a mass and a radius slightly larger than the Sun, and is slightly older (5.6 Gyr). Two scenarios are suggested for the geometry of the star: either its inclination angle is very low, or the rotation velocity of t...

Boumier, P; Baudin, F; Verner, G; Appourchaux, T; Lebreton, Y; Gaulme, P; Chaplin, W; Garcia, R A; Hekker, S; Regulo, C; Salabert, D; Stahn, T; Elsworth, Y; Gizon, L; Hall, M; Mathur, S; Michel, E; Morel, T; Mosser, B; Poretti, E; Rainer, M; Roxburgh, I; Nascimento, J -D do; Samadi, R; Auvergne, M; Chaintreuil, S; Baglin, A; Catala, C

2014-01-01T23:59:59.000Z

117

HD 46375: seismic and spectropolarimetric analysis of a young Sun hosting a Saturn-like planet  

E-Print Network [OSTI]

HD 46375 is known to host a Saturn-like exoplanet orbiting at 0.04 AU from its host star. Stellar light reflected by the planet was tentatively identified in the 34-day CoRoT run acquired in October-November 2008. We constrain the properties of the magnetic field of HD 46375 based on spectropolarimetric observations with the NARVAL spectrograph at the Pic du Midi observatory. In addition, we use a high-resolution NARVAL flux spectrum to contrain the atmospheric parameters. With these constraints, we perform an asteroseismic analysis and modelling of HD 46375 using the frequencies extracted from the CoRoT light curve. We used Zeeman Doppler imaging to reconstruct the magnetic map of the stellar surface. In the spectroscopic analysis we fitted isolated lines using 1D LTE atmosphere models. This analysis was used to constrain the effective temperature, surface gravity, and chemical composition of the star. To extract information about the p-mode oscillations, we used a technique based on the envelope autocorrela...

Gaulme, P; Weiss, W W; Mosser, B; Moutou, C; Bruntt, H; Donati, J -F; Vannier, M; Guillot, T; Appourchaux, T; Michel, E; Auvergne, M; Samadi, R; Baudin, F; Catala, C; Baglin, A; 10.1051/0004-6361/201014142

2010-01-01T23:59:59.000Z

118

THE TRENDS HIGH-CONTRAST IMAGING SURVEY. II. DIRECT DETECTION OF THE HD 8375 TERTIARY  

SciTech Connect (OSTI)

We present the direct imaging detection of a faint tertiary companion to the single-lined spectroscopic binary HD 8375 AB. Initially noticed as an 53 m s{sup -1} yr{sup -1} Doppler acceleration by Bowler et al., we have obtained high-contrast adaptive optics observations at Keck using NIRC2 that spatially resolve HD 8375 C from its host(s). Astrometric measurements demonstrate that the companion shares a common proper-motion. We detect orbital motion in a clockwise direction. Multiband relative photometry measurements are consistent with an early M-dwarf spectral type ({approx}M1V). Our combined Doppler and imaging observations place a lower-limit of m {>=} 0.297 M{sub Sun} on its dynamical mass. We also provide a refined orbit for the inner pair using recent radial velocity measurements obtained with the High Resolution Echelle Spectrometer. HD 8375 is one of many triple-star systems that are apparently missing in the solar neighborhood.

Crepp, Justin R. [Department of Physics, University of Notre Dame, 225 Nieuwland Science Hall, Notre Dame, IN 46556 (United States); Johnson, John Asher; Yantek, Scott M. [Department of Astronomy, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125 (United States); Howard, Andrew W. [Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States); Marcy, Geoff W.; Isaacson, Howard [Department of Astronomy, University of California, Berkeley, CA 94720 (United States); Fischer, Debra A. [Department of Physics, Yale University, New Haven, CT 06511 (United States); Wright, Jason T.; Feng Ying, E-mail: jcrepp@nd.edu [Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802 (United States)

2013-07-01T23:59:59.000Z

119

The CoRoT primary target HD 52265: models and seismic tests  

E-Print Network [OSTI]

HD 52265 is the only known exoplanet-host star selected as a main target for the seismology programme of the CoRoT satellite. As such, it will be observed continuously during five months, which is of particular interest in the framework of planetary systems studies. This star was misclassified as a giant in the Bright Star Catalog, while it is more probably on the main-sequence or at the beginning of the subgiant branch. We performed an extensive analysis of this star, showing how asteroseismology may lead to a precise determination of its external parameters and internal structure. We first reviewed the observational constraints on the metallicity, the gravity and the effective temperature derived from the spectroscopic observations of HD 52265. We also derived its luminosity using the Hipparcos parallax. We computed the evolutionary tracks for models of various metallicities which cross the relevant observational error boxes in the gravity-effective temperature plane. We selected eight different stellar models which satisfy the observational constraints, computed their p-modes frequencies and analysed specific seismic tests. The possible models for HD 52265, which satisfy the constraints derived from the spectroscopic observations, are different in both their external and internal parameters. They lie either on the main sequence or at the beginning of the subgiant branch. The differences in the models lead to quite different properties of their oscillation frequencies. We give evidences of an interesting specific behaviour of these frequencies in case of helium-rich cores: the ``small separations'' may become negative and give constraints on the size of the core. We expect that the observations of this star by the CoRoT satellite wi ll allow choosing between these possible models.

M. Soriano; S. Vauclair; C. Vauclair; M. Laymand

2007-05-17T23:59:59.000Z

120

Many-Body Perturbation Calculation of the Indirect Spin-Spin Coupling Constant in HD Molecule  

Science Journals Connector (OSTI)

The linked-cluster many-body perturbation approach has been applied to the study of indirect nuclear spin-spin coupling constant JHD in HD molecule. The complete set of states used were the bound and continuum states of H2+ molecular ion with the internuclear separation appropriate to H2 molecule. Our calculated value of JHD through the Fermi contact interaction mechanism is +42.57 Hz in good agreement with the most recent experimental value of +42.7±0.7 Hz.

C. M. Dutta; N. C. Dutta; T. P. Das

1970-12-21T23:59:59.000Z

Note: This page contains sample records for the topic "hd ngv potential" 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

Infrared-induced single-phonon desorption of HD from LiF (100)  

Science Journals Connector (OSTI)

Low-intensity (10-5–10-2 watts/cm2) IR radiation at 9–15 ?m desorbs HD from 1.5–4.2-K LiF (100) at a rate (maximum 0.001 monolayer/s) proportional to the light intensity. This process is independent of temperature below 4.2 K, the velocity distribution is approximated by a temperature of 21 K, and the desorption efficiency increases with increasing wavelength. Desorption is attributed to single phonons created in a cascade following optical absorption. Thermal desorption is excluded as a possible mechanism except at high surface temperatures and coverages.

Paul M. Ferm; Sarah R. Kurtz; Kathryn A. Pearlstine; Gary M. McClelland

1987-06-15T23:59:59.000Z

122

Discovery and application of Frequency Ratio Method to the new multiperiodic gamma Dor star HD 218427  

E-Print Network [OSTI]

gamma Dor-type oscillations have been discovered in the star HD218427 through simultaneous uvby photometric observations carried out in the year 2003. A few Hbeta-Crawford measurements were also collected for calibration purposes which place this star well-located inside the gamma Dor instability region. Deficiency in metal content, similar to other well-defined gamma Dor stars, is found in HD218427 and the possibility of a lambda Boo nature is discussed. Frequency analysis was carried out for different filters, the combined "vby" filter was also used and five frequencies were found as significant with periods ranging between 0.3 and 0.8 days. The recently developed Frequency Ratio Method is used in order to perform an identification of the excited modes. The results are consistent with an l=2 identification for all the modes and high radial quantum numbers (n~40) for the three main observed periodicities. The possibility of multiplet structures is also discussed. However, no consistency is found when the Tim...

Rodríguez, E; Suárez, J C; Moya, A; Dupret, M A; Poretti, E; Grigahcene, A; Costa, V; Lopez-Gonzalez, M J

2006-01-01T23:59:59.000Z

123

HD172189: another step in furnishing one of the best laboratories known for asteroseismic studies  

E-Print Network [OSTI]

HD172189 is a spectroscopic eclipsing binary system with a rapidly-rotating pulsating delta Scuti component. It is also a member of the open cluster IC4756. These combined characteristics make it an excellent laboratory for asteroseismic studies. To date, HD172189 has been analysed in detail photometrically but not spectroscopically. For this reason we have compiled a set of spectroscopic data to determine the absolute and atmospheric parameters of the components. We determined the radial velocities (RV) of both components using four different techniques. We disentangled the binary spectra using KOREL, and performed the first abundance analysis on both disentangled spectra. By combining the spectroscopic results and the photometric data, we obtained the component masses, 1.8 and 1.7 solar masses, and radii, 4.0 and 2.4 solar radii, for inclination i = 73.2 degrees, eccentricity e = 0.28, and orbital period 5.70198 days. Effective temperatures of 7600 K and 8100 K were also determined. The measured vsini are 7...

Creevey, O L; Martín-Ruiz, S; Amado, P J; Niemczura, E; VanWinckel, H; Suárez, J C; Rolland, A; Rodler, F; Rodríguez-López, C; Rodríguez, E; Raskin, G; Rainer, M; Poretti, E; Pallé, P; Molina, R; Moya, A; Mathias, P; Guillou, L Le; Hadrava, P; Fabbian, D; Garrido, R; Decin, L; Cutispoto, G; Casanova, V; Broeders, E; Ferro, A Arellano; Aceituno, F

2009-01-01T23:59:59.000Z

124

HOT THERMAL X-RAY EMISSION FROM THE Be STAR HD 119682  

SciTech Connect (OSTI)

We present an analysis of a series of four consecutive Chandra high-resolution transmission gratings observations, amounting to a total of 150 ks, of the Be X-ray source HD 119682 (=1WGA J1346.5-6255), a member of the new class of {gamma} Cas analogs. The Chandra light curve shows significant brightness variations on timescales of hours. However, the spectral distribution appears rather stable within each observation and during the whole campaign. A detailed analysis is not able to detect any coherent pulsation up to a frequency of 0.05 Hz. The Chandra High Energy Transmission Gratings spectrum seems to be devoid of any strong emission line, including Fe K{alpha} fluorescence. The continuum is well described with the addition of two collisionally ionized plasmas of temperatures kT Almost-Equal-To 15 keV and 0.2 keV, respectively, by the apec model. Models using photoionized plasma components (mekal) or non-thermal components (powerlaw) give poorer fits, providing support for the pure thermal scenario. These two components are absorbed by a single column with N {sub H} = (0.20{sup +0.15} {sub -0.03}) Multiplication-Sign 10{sup 22} cm{sup -2} compatible with the interstellar value. We conclude that HD 119682 can be regarded as a pole-on {gamma} Cas analog.

Torrejon, J. M.; Rodes, J. J. [Instituto Universitario de Fisica Aplicada a las Ciencias y las Tecnologias, Universidad de Alicante, E-03080 Alicante (Spain)] [Instituto Universitario de Fisica Aplicada a las Ciencias y las Tecnologias, Universidad de Alicante, E-03080 Alicante (Spain); Schulz, N. S.; Nowak, M. A. [MIT Kavli Institute for Astrophysics and Space Research, Cambridge, MA 02139 (United States)] [MIT Kavli Institute for Astrophysics and Space Research, Cambridge, MA 02139 (United States); Testa, P., E-mail: jmt@ua.es [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States)

2013-03-01T23:59:59.000Z

125

CO gas inside the protoplanetary disk cavity in HD 142527: disk structure from ALMA  

E-Print Network [OSTI]

Inner cavities and annular gaps in circumstellar disks are possible signposts of giant planet formation. The young star HD 142527 hosts a massive protoplanetary disk with a large cavity that extends up to 140 au from the central star, as seen in continuum images at infrared and millimeter wavelengths. Estimates of the survival of gas inside disk cavities are needed to discriminate between clearing scenarios. We present a spatially and spectrally resolved carbon monoxide isotopologue observations of the gas-rich disk HD 142527, in the J=2-1 line of 12CO, 13CO and C18O, obtained with the Atacama Large Millimeter Array (ALMA). We detect emission coming from inside the dust-depleted cavity in all three isotopologues. Based on our analysis of the gas in the dust cavity, the 12CO emission is optically thick, while 13CO and C18O emission are both optically thin. The total mass of residual gas inside the cavity is about 1.5-2 Jupiter masses. We model the gas with an axisymmetric disk model. Our best fit model shows t...

Perez, Sebastian; Ménard, F; Roman, P; van der Plas, G; Cieza, L; Pinte, C; Christiaens, V; Hales, A S

2014-01-01T23:59:59.000Z

126

THE ABSENCE OF COLD DUST AROUND WARM DEBRIS DISK STAR HD 15407A  

SciTech Connect (OSTI)

We report Herschel and AKARI photometric observations at far-infrared (FIR) wavelengths of the debris disk around the F3V star HD 15407A, in which the presence of an extremely large amount of warm dust ({approx}500-600 K) has been suggested by mid-infrared (MIR) photometry and spectroscopy. The observed flux densities of the debris disk at 60-160 {mu}m are clearly above the photospheric level of the star, suggesting excess emission at FIR as well as at MIR wavelengths previously reported. The observed FIR excess emission is consistent with the continuum level extrapolated from the MIR excess, suggesting that it originates in the inner warm debris dust and cold dust ({approx}50-130 K) is absent in the outer region of the disk. The absence of cold dust does not support a late-heavy-bombardment-like event as the origin of the large amount of warm debris dust around HD 15047A.

Fujiwara, Hideaki [Subaru Telescope, National Astronomical Observatory of Japan, 650 North A'ohoku Pl., Hilo, HI 96720 (United States); Onaka, Takashi [Department of Astronomy, School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033 (Japan); Takita, Satoshi; Kataza, Hirokazu; Murakami, Hiroshi [Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210 (Japan); Yamashita, Takuya [National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-0015 (Japan); Fukagawa, Misato [Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043 (Japan); Ishihara, Daisuke, E-mail: hideaki@naoj.org [Department of Physics, School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602 (Japan)

2012-11-01T23:59:59.000Z

127

ALMA observations of the debris disk around the young Solar Analog HD 107146  

E-Print Network [OSTI]

We present ALMA continuum observations at a wavelength of 1.25 mm of the debris disk surrounding the $\\sim$ 100 Myr old solar analog HD 107146. The continuum emission extends from about 30 to 150 AU from the central star with a decrease in the surface brightness at intermediate radii. We analyze the ALMA interferometric visibilities using debris disk models with radial profiles for the dust surface density parametrized as i) a single power-law, ii) a single power-law with a gap, and iii) a double power-law. We find that models with a gap of radial width $\\sim 8$ AU at a distance of $\\sim 80$ AU from the central star, as well as double power-law models with a dip in the dust surface density at $\\sim 70$ AU provide significantly better fits to the ALMA data than single power-law models. We discuss possible scenarios for the origin of the HD 107146 debris disk using models of planetesimal belts in which the formation of Pluto-sized objects trigger disruptive collisions of large bodies, as well as models which co...

Ricci, L; Fu, B; Hughes, A M; Corder, S; Isella, A

2014-01-01T23:59:59.000Z

128

Static properties and the Stark effect of the ground state of the HD molecular ion  

Science Journals Connector (OSTI)

We have calculated the static properties of the ground state of the HD+ ion and its lowest-lying P state without making use of the Born-Oppenheimer approximation, as was done in the case of H2+ and D2+ [A. K. Bhatia, Phys. Rev. A 58, 2787 (1998)]. The ion is treated as a three-body system whose ground state is spherically symmetric. The wave function is of generalized Hylleraas type, but it is necessary to include high powers of the internuclear distance to localize the nuclear motion. We obtain good values of the energies of the ground S state and lowest P state and compare them with earlier calculations. Expectation values are obtained for various operators, the Fermi contact parameters, and the permanent quadrupole moment. The cusp conditions are also calculated. The polarizability is then calculated using second-order perturbation theory with intermediate P pseudostates. Since the nuclei in HD+ are not of equal mass there is dipole coupling between the lowest two rotational states, which are almost degenerate. This situation is carefully analyzed, and the Stark shift is calculated variationally as a function of the applied electric field.

A. K. Bhatia and Richard J. Drachman

2000-02-10T23:59:59.000Z

129

Collisional interference in the foreign-gas-perturbed far-infrared rotational spectrum of HD  

Science Journals Connector (OSTI)

The rotational transitions R(1), R(2), and R(3) of HD have been studied in absorption with 0.06-cm-1 resolution in mixtures of HD with He, Ne, Ar, Kr, Xe, H2, and N2 at 295 K and at densities between 3 and 62 amagat. Collisional interference was observed and the interference parameter, proportional to the ratio of the average induced moment to the allowed moment, showed a dependence on system size and ranged from +10×10-3 amagat-1 for light perturbers to -24×10-3 amagat-1 for the heavier ones. These interference effects in the pure rotational band are an order of magnitude smaller than those of the fundamental vibrational band and show a strong J dependence not predicted within current theory. The sign of the isotropic overlap component of the induced moment was determined experimentally in an unambiguous way and its trend was found to be within theoretical expectation; specifically, the sign changes as the mass increases. The line shapes were mostly symmetrical and Lorentzian; asymmetry was observed mainly for the R(1) transition with the low-frequency side of the lines super-Lorentzian and the high-frequency side sub-Lorentzian. Investigation of the effect of collision duration on the autocorrelation function of the allowed moment showed it was not important to the integrated allowed absorption.

P. G. Drakopoulos and G. C. Tabisz

1987-12-15T23:59:59.000Z

130

Theory of the reentrant quantum rotational phase transition in high-pressure HD  

Science Journals Connector (OSTI)

The phase diagram of HD near 50 GPa exhibits a reentrant phase transition where a rotationally ordered (“broken symmetry”) crystalline phase surprisingly transforms into a rotationally “disordered” high-symmetry phase upon cooling. The qualitative reason for reentrance is the higher entropy of the broken symmetry phase, due to the inequivalence of H and D, as opposed to the low entropy of the high-symmetry phase where the rotational melting is quantum mechanical—a Pomeranchuk-like mechanism. Aiming at a quantitative understanding of this system, we present path integral Monte Carlo (MC) constant-pressure calculations for HD based on empirical but very realistic intermolecular interactions. Ignoring quantum mechanics at first, we use a metadynamics-based classical MC method to seek the lowest-energy zero-temperature classical state, which we identify as a very similar hcp-based structure C2/c as hypothesized by Surh et al. [Phys. Rev. B 55, 11330 (1997)]. Upon turning quantum rotational effects on, we calculate the pressure-temperature phase diagram by monitoring a lattice biased order parameter, and find a reentrant phase boundary in good agreement with experiment. The entropy jump across the transition is found to be comparable with ln2, the value expected for a Pomeranchuk mechanism. A comparison with earlier studies is also presented, yielding relevant information about the role of factors that quantitatively determine the reentrant part of the phase diagram.

Yanier Crespo; Alessandro Laio; Giuseppe E. Santoro; Erio Tosatti

2011-10-28T23:59:59.000Z

131

The solar-like CoRoT target HD 170987: spectroscopic and seismic observations  

E-Print Network [OSTI]

The CoRoT mission is in its third year of observation and the data from the second long run in the galactic centre direction are being analysed. The solar-like oscillating stars that have been observed up to now have given some interesting results, specially concerning the amplitudes that are lower than predicted. We present here the results from the analysis of the star HD 170987.The goal of this research work is to characterise the global parameters of HD 170987. We look for global seismic parameters such as the mean large separation, maximum amplitude of the modes, and surface rotation because the signal-to-noise ratio in the observations do not allow us to measure individual modes. We also want to retrieve the stellar parameters of the star and its chemical composition.We have studied the chemical composition of the star using ground-based observations performed with the NARVAL spectrograph. We have used several methods to calculate the global parameters from the acoustic oscillations based on CoRoT data....

Mathur, S; Catala, C; Bruntt, H; Mosser, B; Appourchaux, T; Ballot, J; Creevey, O L; Gaulme, P; Hekker, S; Huber, D; Karoff, C; Piau, L; Regulo, C; Roxburgh, I W; Salabert, D; Verner, G A; Auvergne, M; Baglin, A; Chaplin, W J; Elsworth, Y; Michel, E; Samadi, R; Sato, K; Stello, D

2010-01-01T23:59:59.000Z

132

Characterisation of the magnetic field of the Herbig Be star HD 200775  

E-Print Network [OSTI]

After our recent discovery of four magnetic Herbig stars, we have decided to study in detail one of them, HD 200775, to determine if its magnetic topology is similar to that of the main sequence magnetic stars. With this aim, we monitored this star in Stokes I and V over more than two years, using the new spectropolarimeters ESPaDOnS at CFHT, and Narval at TBL. Using our data, we find that HD 200775 is a double-lined spectroscopic binary system, whose secondary seems similar, in temperature, to the primary. We determine the luminosity ratio of the system, and using the luminosity of the system found in literature, we derive the luminosity of both stars. From our measurements of the radial velocities of both stars we determine the ephemeris and the orbital parameters of the system. We have fitted 30 Stokes V profiles simultaneously, using a chi2 minimisation method, with a decentered-dipole model. The best-fit model provides a rotation period of 4.3281 d an inclination angle of 60 degrees, and a magnetic obliq...

Alecian, E; Wade, G A; Donati, J -F; Petit, P; Landstreet, J D; Bagnulo, S; Böhm, T; Bouret, J -C; Folsom, C; Grunhut, J; Silvester, J

2007-01-01T23:59:59.000Z

133

Searching for Star-Planet interactions within the magnetosphere of HD 189733  

E-Print Network [OSTI]

HD 189733 is a K2 dwarf, orbited by a giant planet at 8.8 stellar radii. In order to study magnetospheric interactions between the star and the planet, we explore the large-scale magnetic field and activity of the host star. We collected spectra using the ESPaDOnS and the NARVAL spectropolarimeters, installed at the 3.6-m Canada-France-Hawaii telescope and the 2-m Telescope Bernard Lyot at Pic du Midi, during two monitoring campaigns (June 2007 and July 2008). HD 189733 has a mainly toroidal surface magnetic field, having a strength that reaches up to 40 G. The star is differentially rotating, with latitudinal angular velocity shear of domega = 0.146 +- 0.049 rad/d, corresponding to equatorial and polar periods of 11.94 +- 0.16 d and 16.53 +- 2.43 d respectively. The study of the stellar activity shows that it is modulated mainly by the stellar rotation (rather than by the orbital period or the beat period between the stellar rotation and the orbital periods). We report no clear evidence of magnetospheric int...

Fares, R; Moutou, C; Jardine, M M; Griessmeier, J -M; Zarka, P; Shkolnik, E L; Bohlender, D; Catala, C; Cameron, A C

2010-01-01T23:59:59.000Z

134

Pulsations in the late-type Be star HD 50209 detected by CoRoT  

E-Print Network [OSTI]

The presence of pulsations in late-type Be stars is still a matter of controversy. It constitutes an important issue to establish the relationship between non-radial pulsations and the mass-loss mechanism in Be stars. To contribute to this discussion, we analyse the photometric time series of the B8IVe star HD 50209 observed by the CoRoT mission in the seismology field. We use standard Fourier techniques and linear and non-linear least squares fitting methods to analyse the CoRoT light curve. In addition, we applied detailed modelling of high-resolution spectra to obtain the fundamental physical parameters of the star. We have found four frequencies which correspond to gravity modes with azimuthal order m=0,-1,-2,-3 with the same pulsational frequency in the co-rotating frame. We also found a rotational period with a frequency of 0.679 \\cd (7.754 $\\mu$Hz). HD 50209 is a pulsating Be star as expected from its position in the HR diagram, close to the SPB instability strip.

Diago, P D; Auvergne, M; Fabregat, J; Hubert, A -M; Floquet, M; Frémat, Y; Garrido, R; Andrade, L; De Batz, B; Emilio, M; Espinosa-Lara, F; Huat, A -L; Janot-Pacheco, E; Leroy, B; Martayan, C; Neiner, C; Semaan, T; Suso, J; Catala, C; Poretti, E; Rainer, M; Uytterhoeven, K; Michel, E; Samadi, R

2009-01-01T23:59:59.000Z

135

Long-term spectroscopic monitoring of the Luminous Blue Variable HD160529  

E-Print Network [OSTI]

We have spectroscopically monitored the galactic Luminous Blue Variable HD 160529 and obtained an extensive high-resolution data set that covers the years 1991 to 2002. During this period, the star evolved from an extended photometric minimum phase towards a new visual maximum. In several observing seasons, we covered up to four months with almost daily spectra. Our spectra typically cover most of the visual spectral range with a high spectral resolution (about 20,000 or more). This allows us to investigate the variability in many lines and on many time scales from days to years. We find a correlation between the photospheric HeI lines and the brightness of the star, both on a time scale of months and on a time scale of years. The short-term variations are smaller and do not follow the long-term trend, strongly suggesting different physical mechanisms. Metal lines also show both short-term and long-term variations in strength and also a long-term trend in radial velocity. Most of the line-profile variations can be attributed to changing strengths of lines. Propagating features in the line profiles are rarely observed. We find that the mass-loss rate of HD 160529 is almost independent of temperature, i.e. visual brightness.

Otmar Stahl; Thomas Gaeng; Chris Sterken; Andreas Kaufer; Thomas Rivinius; Thomas Szeifert; Bernhard Wolf

2002-12-20T23:59:59.000Z

136

Fuel treatment effectiveness in California yellow pine and mixed conifer forests H.D. Safford a,b,  

E-Print Network [OSTI]

Fuel treatment effectiveness in California yellow pine and mixed conifer forests H.D. Safford a Accepted 15 February 2012 Keywords: Fuel treatment Fire severity Yellow pine forests Mixed conifer forests or mixed conifer forests, in a variety of land- scape conditions. Most fires burned under warm, dry

North, Malcolm

137

Accurate p-mode measurements of the G0V metal-rich CoRoT target HD 52265  

E-Print Network [OSTI]

The star HD 52265 is a G0V metal-rich exoplanet-host star observed in the seismology field of the CoRoT space telescope from November 2008 to March 2009. The satellite collected 117 days of high-precision photometric data on this star, showing that it presents solar-like oscillations. HD 52265 was also observed in spectroscopy with the Narval spectrograph at the same epoch. We characterise HD 52265 using both spectroscopic and seismic data. The fundamental stellar parameters of HD 52265 were derived with the semi-automatic software VWA, and the projected rotational velocity was estimated by fitting synthetic profiles to isolated lines in the observed spectrum. The parameters of the observed p modes were determined with a maximum-likelihood estimation. We performed a global fit of the oscillation spectrum, over about ten radial orders, for degrees l=0 to 2. We also derived the properties of the granulation, and analysed a signature of the rotation induced by the photospheric magnetic activity. Precise determin...

Ballot, J; Samadi, R; Vauclair, G; Benomar, O; Bruntt, H; Mosser, B; Stahn, T; Verner, G A; Campante, T L; García, R A; Mathur, S; Salabert, D; Gaulme, P; Régulo, C; Roxburgh, I W; Appourchaux, T; Baudin, F; Catala, C; Chaplin, W J; Deheuvels, S; Michel, E; Bazot, M; Creevey, O; Dolez, N; Elsworth, Y; Sato, K H; Vauclair, S; Auvergne, M; Baglin, A; 10.1051/0004-6361/201116547

2011-01-01T23:59:59.000Z

138

Near-Infrared Detection and Characterization of the Exoplanet HD 95086 b with the Gemini Planet Imager  

E-Print Network [OSTI]

HD 95086 is an intermediate-mass debris-disk-bearing star. VLT/NaCo $3.8 \\mu m$ observations revealed it hosts a $5\\pm2 \\mathrm{M}_{Jup}$ companion (HD 95086 b) at $\\simeq 56$ AU. Follow-up observations at 1.66 and 2.18 $\\mu m$ yielded a null detection, suggesting extremely red colors for the planet and the need for deeper direct-imaging data. In this Letter, we report H- ($1.7 \\mu m$) and $\\mathrm{K}_1$- ($2.05 \\mu m$) band detections of HD 95086 b from Gemini Planet Imager (GPI) commissioning observations taken by the GPI team. The planet position in both spectral channels is consistent with the NaCo measurements and we confirm it to be comoving. Our photometry yields colors of H-L'= $3.6\\pm 1.0$ mag and K$_1$-L'=$2.4\\pm 0.7$ mag, consistent with previously reported 5-$\\sigma$ upper limits in H and Ks. The photometry of HD 95086 b best matches that of 2M 1207 b and HR 8799 cde. Comparing its spectral energy distribution with the BT-SETTL and LESIA planet atmospheric models yields T$_{\\mathrm{eff}}\\sim$600-1...

Galicher, Raphael; Bonnefoy, Mickael; Baudino, Jean-Loup; Currie, Thayne; Boccaletti, Anthony; Chauvin, Gael; Lagrange, Anne-Marie; Marois, Christian

2014-01-01T23:59:59.000Z

139

Chemical accelerator studies of isotope effects on collision dynamics of ion–molecule reactions: Kr++HD  

E-Print Network [OSTI]

The reaction of Kr+ with HD has been studied as a function of relative collision energy over the range 0.08–3.1 eV (c.m.) by measuring integral reaction cross sections and the velocity vector distributions of product ions ...

Chivalak, S.; Hierl, Peter M.

1977-01-01T23:59:59.000Z

140

Spectroscopic Analyses of the Planetary System Candidates: 55 Cnc, 51 Peg, 47 UMa, 70 Vir, and HD 114762  

E-Print Network [OSTI]

The stars 55 Cnc, 51 Peg, 47 UMa, 70 Vir, and HD 114762 have recently been proposed to harbor planetary mass companions. Using spectrospic methods we find that 55 Cnc and 51 Peg are super metal- rich, 47 UMa and 70 Vir have roughly solar metallicities, and HD 114762 is metal-poor. Otherwise, the abundance patterns, expressed as [X/Fe], are approximately solar. The ages of 47 UMa and 51 Peg are similar to that of the Sun; 70 Vir is slightly older, and 55 Cnc and HD 114762 are at least 10 Gyr old. Our estimates of vsini for the parent stars are 1.4, 1.8, 2.0, Cnc, 51 Peg, 47 UMa, 70 Vir, and HD 114762, respectively. Using these data and estimates for the rotation periods and radii, the corresponding masses of the companions are: > 0.6, 0.51, 4.6, > 20, and > 8.5 MJ. The systems appear to fall into three groups: roughly Jupiter mass companions with small circular orbits with metal-rich parent stars (55 Cnc and 51 Peg), larger companions with larger circular orbits (47 UMa), and much more massive companions with large eccentric orbits around moderately metal- poor parent stars (70 Vir and HD 114762). Our findings are consistent with the recently proposed mechanism whereby a gas giant migrates to within a few hundredths of an AU of its parent star during the formative epoch of the planetary system. During this process the material between the giant planet and the star is accreted onto the latter. If the accreted material is depleted in H and He, then the photospheric composition of the parent star might be altered significantly.

Guillermo Gonzalez

1996-09-20T23:59:59.000Z

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141

Asteroseismic analysis of the CoRoT \\delta-Scuti star HD174936  

E-Print Network [OSTI]

We present an analysis of the \\delta-Scuti star object HD 174936 (ID 7613) observed by CoRoT during the first short run SRc01 (27 days). A total number of 422 frequencies we are extracted from the light curve using standard prewhitening techniques. This number of frequencies was obtained by considering a spectral significance limit of sig = 10 using the software package SigSpec. Our analysis of the oscillation frequency spectrum reveals a spacing periodicity of around 52 \\muHz. Although modes considered here are not in the asymptotic regime, a comparison with stellar models confirms that this signature may stem from a quasi-periodic pattern similar to the so-called large separation in solar-like stars.

Hernández, A García; Michel, E; Garrido, R; Suárez, J C; Rodríguez, E; Amado, P J; Martín-Ruíz, S; Rolland, A; Poretti, E; Samadi, R; Baglin, A; Auvergne, M; Catala, C; Lefèvre, L; Baudin, F

2009-01-01T23:59:59.000Z

142

Non-Born-Oppenheimer calculations of the lowest vibrational energy of HD including relativistic corrections  

Science Journals Connector (OSTI)

In this work we report variational calculations of the two lowest vibrational states of the HD molecule within the framework that does not assume the Born-Oppenheimer (BO) approximation. The nonrelativistic energies of the states were corrected for the relativistic effects of the order of ?2 (where ?=1c), calculated as expectation values of the operators representing these effects with the nonrelativistic non-BO wave functions. The non-BO wave functions were expanded in terms of the one-center explicitly correlated Gaussian functions multiplied by even powers of the internuclear distance. The v=0?1 transition energy obtained in the calculations is compared with the previous calculations, as well as with the transition frequency obtained from the experimental spectra. The comparison shows the need to include corrections higher than second order in ? to further improve the agreement between the theory and the experiment.

Monika Stanke; Sergiy Bubin; Marcin Molski; Ludwik Adamowicz

2009-03-16T23:59:59.000Z

143

Magnetic, Chemical and Rotational Properties of the Herbig Ae/Be Binary System HD 72106  

E-Print Network [OSTI]

Recently, strong, globally-ordered magnetic fields have been detected in some Herbig Ae and Be (HAeBe) stars, suggesting a possible evolutionary connection to main sequence magnetic chemically peculiar Ap and Bp stars. We have undertaken a detailed study of the binary system HD 72106, which contains a B9 magnetic primary and a HAeBe secondary, using the ESPaDOnS spectropolarimeter mounted on the CFHT. A careful analysis of the very young primary reveals that it has an approximately dipolar magnetic field geometry, strong chemical peculiarities, and strong surface chemical abundance inhomogeneities. Thus the primary is very similar to an Ap/Bp star despite having completed less then 1.5% of its main sequence life, and possibly still being on the pre-main sequence. In contrast, a similar analysis of the secondary reveals solar chemical abundances and no magnetic field.

Folsom, C P; Kochukhov, O; Alecian, E; Catala, C; Bagnulo, S; Landstreet, J D; Hanes, D A

2007-01-01T23:59:59.000Z

144

A DOUBLE PLANETARY SYSTEM AROUND THE EVOLVED INTERMEDIATE-MASS STAR HD 4732  

SciTech Connect (OSTI)

We report the detection of a double planetary system orbiting around the evolved intermediate-mass star HD 4732 from precise Doppler measurements at Okayama Astrophysical Observatory and Australian Astronomical Observatory. The star is a K0 subgiant with a mass of 1.7 M {sub Sun} and solar metallicity. The planetary system is composed of two giant planets with minimum mass of msin i = 2.4 M {sub J}, orbital period of 360.2 days and 2732 days, and eccentricity of 0.13 and 0.23, respectively. Based on dynamical stability analysis for the system, we set the upper limit on the mass of the planets to be about 28 M {sub J} (i > 5 Degree-Sign ) in the case of coplanar prograde configuration.

Sato, Bun'ei; Omiya, Masashi; Harakawa, Hiroki; Nagasawa, Makiko; Ida, Shigeru [Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551 (Japan)] [Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551 (Japan); Wittenmyer, Robert A. [Department of Astrophysics, School of Physics, University of NSW 2052 (Australia)] [Department of Astrophysics, School of Physics, University of NSW 2052 (Australia); Izumiura, Hideyuki; Kambe, Eiji [Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, Kamogata, Okayama 719-0232 (Japan)] [Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, Kamogata, Okayama 719-0232 (Japan); Takeda, Yoichi; Kokubo, Eiichiro [The Graduate University for Advanced Studies, Shonan Village, Hayama, Kanagawa 240-0193 (Japan)] [The Graduate University for Advanced Studies, Shonan Village, Hayama, Kanagawa 240-0193 (Japan); Yoshida, Michitoshi [Hiroshima Astrophysical Science Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526 (Japan)] [Hiroshima Astrophysical Science Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526 (Japan); Itoh, Yoichi [Nishi-Harima Astronomical Observatory, Center for Astronomy, University of Hyogo, 407-2, Nishigaichi, Sayo, Hyogo 679-5313 (Japan)] [Nishi-Harima Astronomical Observatory, Center for Astronomy, University of Hyogo, 407-2, Nishigaichi, Sayo, Hyogo 679-5313 (Japan); Ando, Hiroyasu, E-mail: satobn@geo.titech.ac.jp [National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan)] [National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan)

2013-01-01T23:59:59.000Z

145

MULTI-EPOCH OBSERVATIONS OF HD 69830: HIGH-RESOLUTION SPECTROSCOPY AND LIMITS TO VARIABILITY  

SciTech Connect (OSTI)

The main-sequence solar-type star HD 69830 has an unusually large amount of dusty debris orbiting close to three planets found via the radial velocity technique. In order to explore the dynamical interaction between the dust and planets, we have performed multi-epoch photometry and spectroscopy of the system over several orbits of the outer dust. We find no evidence for changes in either the dust amount or its composition, with upper limits of 5%-7% (1{sigma} per spectral element) on the variability of the dust spectrum over 1 year, 3.3% (1{sigma}) on the broadband disk emission over 4 years, and 33% (1{sigma}) on the broadband disk emission over 24 years. Detailed modeling of the spectrum of the emitting dust indicates that the dust is located outside of the orbits of the three planets and has a composition similar to main-belt, C-type asteroids in our solar system. Additionally, we find no evidence for a wide variety of gas species associated with the dust. Our new higher signal-to-noise spectra do not confirm our previously claimed detection of H{sub 2}O ice leading to a firm conclusion that the debris can be associated with the break-up of one or more C-type asteroids formed in the dry, inner regions of the protoplanetary disk of the HD 69830 system. The modeling of the spectral energy distribution and high spatial resolution observations in the mid-infrared are consistent with a {approx}1 AU location for the emitting material.

Beichman, C. A.; Tanner, A. M.; Bryden, G.; Akeson, R. L.; Ciardi, D. R. [NASA Exoplanet Science Institute, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, 91125 (United States); Lisse, C. M. [Johns Hopkins University, Applied Physics Laboratory, Laurel, MD 20723 (United States); Boden, A. F. [Caltech Optical Observatories, California Institute of Technology, Pasadena, CA 91125 (United States); Dodson-Robinson, S. E.; Salyk, C. [University of Texas, Astronomy Department, Austin, TX 78712 (United States); Wyatt, M. C., E-mail: chas@pop.jpl.nasa.gov [Institute of Astronomy, University of Cambridge, Cambridge, CB3 0HA (United Kingdom)

2011-12-10T23:59:59.000Z

146

Macintosh HD:Users:mtflight:Documents:physics:REGISTRATION AUTHORIZATION FORM-14U.docx 04.11.2014 REGISTRATION AUTHORIZATION FORM  

E-Print Network [OSTI]

Macintosh HD:Users:mtflight:Documents:physics:REGISTRATION AUTHORIZATION FORM-14U faculty member(s). c. PhD track students will need to obtain an approval signature from the professor who

O'Toole, Alice J.

147

Macintosh HD:Users:mtflight:Documents:physics:REGISTRATION AUTHORIZATION FORM-14F.docx 04.11.2014 REGISTRATION AUTHORIZATION FORM  

E-Print Network [OSTI]

Macintosh HD:Users:mtflight:Documents:physics:REGISTRATION AUTHORIZATION FORM-14F faculty member(s). c. PhD track students will need to obtain an approval signature from the professor who

O'Toole, Alice J.

148

HDice, Highly-Polarized Low-Background Frozen-Spin HD Targets for CLAS experiments at Jefferson Lab  

SciTech Connect (OSTI)

Large, portable frozen-spin HD (Deuterium-Hydride) targets have been developed for studying nucleon spin properties with low backgrounds. Protons and Deuterons in HD are polarized at low temperatures (~10mK) inside a vertical dilution refrigerator (Oxford Kelvinox-1000) containing a high magnetic field (up to 17T). The targets reach a frozen-spin state within a few months, after which they can be cold transferred to an In-Beam Cryostat (IBC). The IBC, a thin-walled dilution refrigerator operating either horizontally or vertically, is use with quasi-4{pi} detector systems in open geometries with minimal energy loss for exiting reaction products in nucleon structure experiments. The first application of this advanced target system has been used for Spin Sum Rule experiments at the LEGS facility in Brookhaven National Laboratory. An improved target production and handling system has been developed at Jefferson Lab for experiments with the CEBAF Large Acceptance Spectrometer, CLAS.

Wei, Xiangdong [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Bass, Christopher [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); D& #x27; Angelo, Annalisa [INFN-Roma Tor Vegata, Rome (Italy); Deur, Alexandre P. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Dezern, Gary L. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Ho, Dao Hoang [Carnegie Mellon University, Pittsburgh, PA (United States); Kageya, Tsuneo [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Khandaker, Mahbubul A, [Idaho State University, ID (United States); Kashy, David H. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Laine, Vivien Eric [Blaise Pascal University, Clermont-Ferrand (France); Lowry, Michael M. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); O& #x27; Connell, Thomas Robert [University of Connecticut, Storrs, CT (United States); Sandorfi, Andrew M. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Teachey, II, Robert W. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Whisnant, Charles Steven [James Madison University, Harrisonburg PA (United States); Zarecky, Michael R. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

2012-12-01T23:59:59.000Z

149

Test Results of HD2, A High Field Nb3Sn Dipole with A 36 MM Bore  

SciTech Connect (OSTI)

The Superconducting Magnet Program at Lawrence Berkeley National Laboratory (LBNL) has developed the 1 m long Nb{sub 3}Sn dipole magnet HD2. With tilted (flared) ends to avoid obstructing a 36 mm clear bore, HD2 represents a step towards the use of block-type coils in high-field accelerator magnets. The coil design has been optimized to minimize geometric harmonics and reduce the conductor peak field in the end region, resulting in an expected short sample dipole field of 15 T. The support structure is composed by an external aluminum shell pre-tensioned with pressurized bladders and interference keys, and by two stainless steel end plates compressing the coil ends through four aluminum axial rods. We report on magnet design, assembly, and test results, including training performance, quench locations, and strain gauge measurements.

Ferracin, Paolo

2008-05-19T23:59:59.000Z

150

IMPROVED Ti II log(gf) VALUES AND ABUNDANCE DETERMINATIONS IN THE PHOTOSPHERES OF THE SUN AND METAL-POOR STAR HD 84937  

SciTech Connect (OSTI)

Atomic transition probability measurements for 364 lines of Ti II in the UV through near-IR are reported. Branching fractions from data recorded using a Fourier transform spectrometer (FTS) and a new echelle spectrometer are combined with published radiative lifetimes to determine these transition probabilities. The new results are in generally good agreement with previously reported FTS measurements. Use of the new echelle spectrometer, independent radiometric calibration methods, and independent data analysis routines enables a reduction of systematic errors and overall improvement in transition probability accuracy over previous measurements. The new Ti II data are applied to high-resolution visible and UV spectra of the Sun and metal-poor star HD 84937 to derive new, more accurate Ti abundances. Lines covering a range of wavelength and excitation potential are used to search for non-LTE effects. The Ti abundances derived using Ti II for these two stars match those derived using Ti I and support the relative Ti/Fe abundance ratio versus metallicity seen in previous studies.

Wood, M. P.; Lawler, J. E. [Department of Physics, University of Wisconsin, Madison, WI 53706 (United States); Sneden, C. [Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712 (United States); Cowan, J. J., E-mail: mpwood@wisc.edu, E-mail: jelawler@wisc.edu, E-mail: chris@verdi.as.utexas.edu, E-mail: cowan@nhn.ou.edu [Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK 73019 (United States)

2013-10-01T23:59:59.000Z

151

Determination of deuteron quadrupole moment from calculations of the electric field gradient in D{sub 2} and HD  

SciTech Connect (OSTI)

We have carried out an accurate determination of the quadrupole moment of the deuteron nucleus. The evaluation of the constant is achieved by combining high accuracy Born-Oppenheimer calculations of the electric field gradient at the nucleus in the H{sub 2} molecule with spectroscopic measurements of the quadrupolar splitting in D{sub 2} and HD. The derived value is Q=0.285783(30) fm{sup 2}.

Pavanello, Michele; Tung Weicheng; Adamowicz, Ludwik [Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721 (United States)

2010-04-15T23:59:59.000Z

152

HD 259440: THE PROPOSED OPTICAL COUNTERPART OF THE {gamma}-RAY BINARY HESS J0632+057  

SciTech Connect (OSTI)

HD 259440 is a B0pe star that was proposed as the optical counterpart to the {gamma}-ray source HESS J0632+057. Here, we present optical spectra of HD 259440 acquired to investigate the stellar parameters, the properties of the Be star disk, and evidence of binarity in this system. Emission from the H{alpha} line shows evidence of a spiral density wave in the nearly edge-on disk. We find a best-fit stellar effective temperature of 27,500-30,000 K and a log surface gravity of 3.75-4.0, although our fits are somewhat ambiguous due to scattered light from the circumstellar disk. We derive a mass of 13.2-19.0 M{sub sun} and a radius of 6.0-9.6 R{sub sun}. By fitting the spectral energy distribution, we find a distance between 1.1 and 1.7 kpc. We do not detect any significant radial velocity shifts in our data, ruling out orbital periods shorter than one month. If HD 259440 is a binary, it is likely a long-period (>100 d) system.

Aragona, Christina; McSwain, M. Virginia [Department of Physics, Lehigh University, 16 Memorial Drive East, Bethlehem, PA 18015 (United States); De Becker, Michael, E-mail: cha206@lehigh.ed, E-mail: mcswain@lehigh.ed, E-mail: debecker@astro.ulg.ac.b [Institut d'Astrophysique et Geophysique, Universite de Liege, B-4000 Liege (Belgium)

2010-11-20T23:59:59.000Z

153

HD 50844: the new look of Delta Sct stars from CoRoT space photometry  

E-Print Network [OSTI]

It has also been suggested that the detection of a wealth of very low amplitude modes in Delta Sct stars was only a matter of signal--to--noise ratio. Access to this treasure, impossible from the ground, is one of the scientific aims of the space mission CoRoT, a space mission developed and operated by CNES. This work presents the results obtained on HD 50844: the 140,016 datapoints were analysed using independent approaches and several checks performed. A level of 10^{-5} mag was reached in the amplitude spectra of the CoRoT timeseries. The frequency analysis of the CoRoT timeseries revealed hundreds of terms in the frequency range 0--30 d^{-1}. All the cross--checks confirmed this new result. The initial guess that Delta Sct stars have a very rich frequency content is confirmed. The spectroscopic mode identification gives theoretical support since very high--degree modes (up to ell=14) are identified. We also prove that cancellation effects are not sufficient in removing the flux variations associated to th...

Poretti, E; Garrido, R; Lefèvre, L; Mantegazza, L; Rainer, M; Rodríguez, E; Uytterhoeven, K; Amado, P J; Martin-Ruiz, S; Moya, A; Niemczura, E; Suárez, J C; Zima, W; Baglin, A; Auvergne, M; Baudin, F; Catala, C; Samadi, R; Alvarez, M; Mathias, P; Paparo, M; Papics, P; Plachy, E

2009-01-01T23:59:59.000Z

154

A map of the day-night contrast of the extrasolar planet HD 189733b  

E-Print Network [OSTI]

"Hot Jupiter" extrasolar planets are expected to be tidally locked because they are close (Sun-Earth distance) to their parent stars, resulting in permanent daysides and nightsides. By observing systems where the planet and star periodically eclipse each other, several groups have been able to estimate the temperatures of the daysides of these planets. A key question is whether the atmosphere is able to transport the energy incident upon the dayside to the nightside, which will determine the temperature at different points on the planet's surface. Here we report observations of HD 189733, the closest of these eclipsing planetary systems, over half an orbital period, from which we can construct a 'map' of the distribution of temperatures. We detected the increase in brightness as the dayside of the planet rotated into view. We estimate a minimum brightness temperature of 973 +/- 33 K and a maximum brightness temperature of 1212 +/- 11 K at a wavelength of 8 microns, indicating that energy from the irradiated dayside is efficiently redistributed throughout the atmosphere, in contrast to a recent claim for another hot Jupiter. Our data indicate that the peak hemisphere-integrated brightness occurs 16$\\pm$6 degrees before opposition, corresponding to a hot spot shifted east of the substellar point. The secondary eclipse (when the planet moves behind the star) occurs 120 +/- 24 s later than predicted, which may indicate a slightly eccentric orbit.

Heather A. Knutson; David Charbonneau; Lori E. Allen; Jonathan J. Fortney; Eric Agol; Nicolas B. Cowan; Adam P. Showman; Curtis S. Cooper; S. Thomas Megeath

2007-05-07T23:59:59.000Z

155

Neutron-capture elements in the very metal-poor star HD122563  

E-Print Network [OSTI]

We obtained high resolution, high S/N spectroscopy for the very metal-poor star HD122563 with the Subaru Telescope High Dispersion Spectrograph. Previous studies have shown that this object has excesses of light neutron-capture elements, while its abundances of heavy ones are very low. In our spectrum covering 3070 - 4780 A of this object, 19 neutron-capture elements have been detected, including seven for the first time in this star (Nb, Mo, Ru, Pd, Ag, Pr, and Sm). Upper limits are given for five other elements including Th. The abundance pattern shows a gradually decreasing trend, as a function of atomic number, from Sr to Yb, which is quite different from those in stars with excesses of r-process elements. This abundance pattern of neutron-capture elements provides new strong constraints on the models of nucleosynthesis responsible for the very metal-poor stars with excesses of light neutron-capture elements but without enhancement of heavy ones.

S. Honda; W. Aoki; Y. Ishimaru; S. Wanajo; S. G. Ryan

2006-02-06T23:59:59.000Z

156

HD 54272, a classical lambda Bootis star and gamma Doradus pulsator  

E-Print Network [OSTI]

We detect the second known lambda Bootis star (HD 54272) which exhibits gamma Doradus-type pulsations. The star was formerly misidentified as a RR Lyrae variable. The lambda Bootis stars are a small group (only 2 per cent) of late B to early F-type, Population I stars which show moderate to extreme (up to a factor 100) surface underabundances of most Fe-peak elements and solar abundances of lighter elements (C, N, O, and S). The photometric data from the Wide Angle Search for Planets (WASP) and All Sky Automated Survey (ASAS) projects were analysed. They have an overlapping time base of 1566 d and 2545 d, respectively. Six statistically significant peaks were identified (f1 = 1.410 116 c/d, f2 = 1.283 986 c/d, f3 = 1.293 210 c/d, f4 = 1.536 662 c/d, f5 = 1.157 22 c/d and f6 = 0.226 57 c/d). The spacing between f1 and f2, f1 and f4, f5 and f2 is almost identical. Since the daily aliasing is very strong, the interpretation of frequency spectra is somewhat ambiguous. From spectroscopic data, we deduce a high rot...

Paunzen, E; Holdsworth, D L; Smalley, B; West, R G

2014-01-01T23:59:59.000Z

157

Warm H2O and OH in the disk around the Herbig star HD 163296  

E-Print Network [OSTI]

We present observations of far-infrared (50-200 micron) OH and H2O emission of the disk around the Herbig Ae star HD 163296 obtained with Herschel/PACS in the context of the DIGIT key program. In addition to strong [OI] emission, a number of OH doublets and a few weak highly excited lines of H2O are detected. The presence of warm H2O in this Herbig disk is confirmed by a line stacking analysis, enabled by the full PACS spectral scan, and by lines seen in Spitzer data. The line fluxes are analyzed using an LTE slab model including line opacity. The water column density is 10^14 - 10^15 cm^-2, and the excitation temperature is 200-300 K implying warm gas with a density n > 10^5 cm^-3. For OH we find a column density of 10^14 - 2x10^15 cm^-2 and T_ex ~ 300-500 K. For both species we find an emitting region of r ~ 15-20 AU from the star. We argue that the molecular emission arises from the protoplanetary disk rather than from an outflow. This far-infrared detection of both H2O and OH contrasts with near- and mid-...

Fedele, D; van Dishoeck, E F; Herczeg, G J; Evans, N J; Bouwman, J; Henning, Th; Green, J

2012-01-01T23:59:59.000Z

158

Surface structure of the CoRoT CP2 target star HD 50773  

E-Print Network [OSTI]

We compare surface maps of the chemically peculiar star HD 50773 produced with a Bayesian technique and based on high quality CoRoT photometry with those derived from rotation phase resolved spectropolarimetry. The goal is to investigate the correlation of surface brightness with surface chemical abundance distribution and the stellar magnetic field. The rotational period of the star was determined from a nearly 60 day long continuous light curve obtained during the initial run of CoRoT. Using a Bayesian approach to star-spot modelling, which in this work is applied for the first time for the photometric mapping of a CP star, we derived longitudes, latitudes and radii of four different spot areas. Additional parameters like stellar inclination and the spot's intensities were also determined. The CoRoT observations triggered an extensive ground-based spectroscopic and spectropolarimetric observing campaign and enabled us to obtain 19 different high resolution spectra in Stokes parameters I and V with NARVAL, E...

Lüftinger, T; Weiss, W; Petit, P; Aurière, M; Nesvacil, N; Gruberbauer, M; Shulyak, D; Alecian, E; Baglin, A; Baudin, F; Catala, C; Donati, J -F; Kochukhov, O; Michel, E; Piskunov, N; Roudier, T; Samadi, R

2009-01-01T23:59:59.000Z

159

Solar-like oscillations with low amplitude in the CoRoT target HD 181906  

E-Print Network [OSTI]

Context: The F8 star HD 181906 (effective temperature ~6300K) was observed for 156 days by the CoRoT satellite during the first long run in the centre direction. Analysis of the data reveals a spectrum of solar-like acoustic oscillations. However, the faintness of the target (m_v=7.65) means the signal-to-noise (S/N) in the acoustic modes is quite low, and this low S/N leads to complications in the analysis. Aims: To extract global variables of the star as well as key parameters of the p modes observed in the power spectrum of the lightcurve. Methods: The power spectrum of the lightcurve, a wavelet transform and spot fitting have been used to obtain the average rotation rate of the star and its inclination angle. Then, the autocorrelation of the power spectrum and the power spectrum of the power spectrum were used to properly determine the large separation. Finally, estimations of the mode parameters have been done by maximizing the likelihood of a global fit, where several modes were fit simultaneously. Resu...

García, R A; Samadi, R; Ballot, J; Barban, C; Benomar, O; Chaplin, W J; Gaulme, P; Appourchaux, T; Mathur, S; Mosser, B; Toutain, T; Verner, G A; Auvergne, M; Baglin, A; Baudin, F; Boumier, P; Bruntt, H; Catala, C; Deheuvels, S; Elsworth, Y; Jiménez-Reyes, S J; Michel, E; Hernandez, F Perez; Roxburgh, I W; Salabert, D

2009-01-01T23:59:59.000Z

160

The magnetic field of the pre-main sequence Herbig Ae star HD 190073  

E-Print Network [OSTI]

The general context of this paper is the study of magnetic fields in the pre-main sequence intermediate mass Herbig Ae/Be stars. Magnetic fields are likely to play an important role in pre-main sequence evolution at these masses, in particular in controlling the gains and losses of stellar angular momentum. The particular aim of this paper is to announce the detection of a structured magnetic field in the Herbig Ae star HD 190073, and to discuss various scenarii for the geometry of the star, its environment and its magnetic field. We have used the ESPaDOnS spectropolarimeter at CFHT in 2005 and 2006 to obtain high-resolution and signal-to-noise circular polarization spectra which demonstrate unambiguously the presence of a magnetic field in the photosphere of this star. Nine circular polarization spectra were obtained, each one showing a clear Zeeman signature. This signature is suggestive of a magnetic field structured on large scales. The signature, which corresponds to a longitudinal magnetic field of 74+-...

Catala, C; Donati, J F; Wade, G A; Landstreet, J D; Böhm, T; Bouret, J C; Bagnulo, S; Folsom, C; Silvester, J

2006-01-01T23:59:59.000Z

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161

The Transit Light Curve Project. X. A Christmas Transit of HD 17156b  

E-Print Network [OSTI]

Photometry is presented of the Dec. 25, 2007 transit of HD 17156b, which has the longest orbital period and highest orbital eccentricity of all the known transiting exoplanets. New measurements of the stellar radial velocity are also presented. All the data are combined and integrated with stellar-evolutionary modeling to derive refined system parameters. The planet's mass and radius are found to be 3.212_{-0.082}^{+0.069} Jupiter masses and 1.023_{-0.055}^{+0.070} Jupiter radii. The corresponding stellar properties are 1.263_{-0.047}^{+0.035} solar masses and 1.446_{-0.067}^{+0.099} solar radii. The planet is smaller by 1 sigma than a theoretical solar-composition gas giant with the same mass and equilibrium temperature, a possible indication of heavy-element enrichment. The midtransit time is measured to within 1 min, and shows no deviation from a linear ephemeris (and therefore no evidence for orbital perturbations from other planets). We provide ephemerides for future transits and superior conjunctions. T...

Winn, Joshua N; Henry, Gregory W; Torres, Guillermo; Fischer, Debra; Johnson, John Asher; Marcy, Geoffrey W; Shporer, Avi; Mazeh, Tsevi

2008-01-01T23:59:59.000Z

162

The Transit Light Curve Project. X. A Christmas Transit of HD 17156b  

E-Print Network [OSTI]

Photometry is presented of the Dec. 25, 2007 transit of HD 17156b, which has the longest orbital period and highest orbital eccentricity of all the known transiting exoplanets. New measurements of the stellar radial velocity are also presented. All the data are combined and integrated with stellar-evolutionary modeling to derive refined system parameters. The planet's mass and radius are found to be 3.212_{-0.082}^{+0.069} Jupiter masses and 1.023_{-0.055}^{+0.070} Jupiter radii. The corresponding stellar properties are 1.263_{-0.047}^{+0.035} solar masses and 1.446_{-0.067}^{+0.099} solar radii. The planet is smaller by 1 sigma than a theoretical solar-composition gas giant with the same mass and equilibrium temperature, a possible indication of heavy-element enrichment. The midtransit time is measured to within 1 min, and shows no deviation from a linear ephemeris (and therefore no evidence for orbital perturbations from other planets). We provide ephemerides for future transits and superior conjunctions. There is an 18% chance that the orbital plane is oriented close enough to edge-on for secondary eclipses to occur at superior conjunction. Observations of secondary eclipses would reveal the thermal emission spectrum of a planet that experiences unusually large tidal heating and insolation variations.

Joshua N. Winn; Matthew J. Holman; Gregory W. Henry; Guillermo Torres; Debra Fischer; John Asher Johnson; Geoffrey W. Marcy; Avi Shporer; Tsevi Mazeh

2008-10-26T23:59:59.000Z

163

Comparative Study of Hybrid Powertrains on Fuel Saving, Emissions, and Component Energy Loss in HD Trucks  

SciTech Connect (OSTI)

We compared parallel and series hybrid powertrains on fuel economy, component energy loss, and emissions control in Class 8 trucks over both city and highway driving. A comprehensive set of component models describing battery energy, engine fuel efficiency, emissions control, and power demand interactions for heavy duty (HD) hybrids has been integrated with parallel and series hybrid Class 8 trucks in order to identify the technical barriers of these hybrid powertrain technologies. The results show that series hybrid is absolutely negative for fuel economy benefit of long-haul trucks due to an efficiency penalty associated with the dual-step conversions of energy (i.e. mechanical to electric to mechanical). The current parallel hybrid technology combined with 50% auxiliary load reduction could elevate 5-7% fuel economy of long-haul trucks, but a profound improvement of long-haul truck fuel economy requires additional innovative technologies for reducing aerodynamic drag and rolling resistance losses. The simulated emissions control indicates that hybrid trucks reduce more CO and HC emissions than conventional trucks. The simulated results further indicate that the catalyzed DPF played an important role in CO oxidations. Limited NH3 emissions could be slipped from the Urea SCR, but the average NH3 emissions are below 20 ppm. Meanwhile our estimations show 1.5-1.9% of equivalent fuel-cost penalty due to urea consumption in the simulated SCR cases.

Gao, Zhiming [ORNL; FINNEY, Charles E A [ORNL; Daw, C Stuart [ORNL; LaClair, Tim J [ORNL; Smith, David E [ORNL

2014-01-01T23:59:59.000Z

164

The curious case of HD41248. A pair of static signals buried behind red-noise  

E-Print Network [OSTI]

Gaining a better understanding of the effects of stellar induced radial velocity noise is critical for the future of exoplanet studies, since the discovery of the lowest-mass planets using this method will require us to go below the intrinsic stellar noise limit. An interesting test case in this respect is that of the southern solar analogue HD41248. The radial velocity time series of this star has been proposed to contain either a pair of signals with periods of around 18 and 25 days, that could be due to a pair of resonant super-Earths, or a single and varying 25 day signal that could arise due to a complex interplay between differential rotation and modulated activity. In this letter we build-up more evidence for the former scenario, showing that the signals are still clearly significant even after more than 10 years of observations and they likely do not change in period, amplitude, or phase as a function of time, the hallmarks of static Doppler signals. We show that over the last two observing seasons th...

Jenkins, James S

2014-01-01T23:59:59.000Z

165

CHARACTERIZING THE ORBITAL AND DYNAMICAL STATE OF THE HD 82943 PLANETARY SYSTEM WITH KECK RADIAL VELOCITY DATA  

SciTech Connect (OSTI)

We present an updated analysis of radial velocity data of the HD 82943 planetary system based on 10 yr of measurements obtained with the Keck telescope. Previous studies have shown that the HD 82943 system has two planets that are likely in 2:1 mean-motion resonance (MMR), with orbital periods about 220 and 440 days. However, alternative fits that are qualitatively different have also been suggested, with two planets in a 1:1 resonance or three planets in a Laplace 4:2:1 resonance. Here we use ?{sup 2} minimization combined with a parameter grid search to investigate the orbital parameters and dynamical states of the qualitatively different types of fits, and we compare the results to those obtained with the differential evolution Markov chain Monte Carlo method. Our results support the coplanar 2:1 MMR configuration for the HD 82943 system, and show no evidence for either the 1:1 or three-planet Laplace resonance fits. The inclination of the system with respect to the sky plane is well constrained at 20{sup +4.9}{sub -5.5} degrees, and the system contains two planets with masses of about 4.78 M{sub J} and 4.80 M{sub J} (where M{sub J} is the mass of Jupiter) and orbital periods of about 219 and 442 days for the inner and outer planet, respectively. The best fit is dynamically stable with both eccentricity-type resonant angles ?{sub 1} and ?{sub 2} librating around 0°.

Tan, Xianyu; Lee, Man Hoi [Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong (China); Payne, Matthew J.; Ford, Eric B. [Department of Astronomy, University of Florida, FL 32611-2055 (United States); Howard, Andrew W. [Institute for Astronomy, University of Hawaii at Manoa, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States); Johnson, John A. [Department of Planetary Sciences, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125 (United States); Marcy, Geoff W. [Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States); Wright, Jason T., E-mail: xianyut@lpl.arizona.edu [Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802 (United States)

2013-11-10T23:59:59.000Z

166

Ultraviolet absorption by interstellar gas near the LMC star HD 36402 in the interstellar bubble N51D  

SciTech Connect (OSTI)

We have studied ultraviolet high-dispersion IUE spectra of the LMC star HD 36402 in the nebulosity N51D. Apart from absorption due to Milky Way gas, we find four interstellar absorption components associated with the immediate surroundings of HD 36402. The absorption at 305 km/sup -1/ originates in low-density, n(e)roughly-equal0.1 cm/sup -3/, 10/sup 4/ K gas. At 280 km s/sup -1/, strong absroption from the excited fine-structure level of carbon points to densities n(e)>1 cm/sup -3/ at 10/sup 4/ K. The velocity and density structure agree with that derived from visual emission lines. Additional weak absorption by common interstellar ions is seen near 260 km s/sup -1/. From a fit to the observed Lv..cap alpha.. profile, it is found that there is N(H)roughly-equal10/sup 20.2/ cm/sup -2/ in front of HD 36402, while the large N(H)roughly-equal10/sup 21.3/ cm/sup -2/ from 21 cm data clearly places most of the neutral gas behind N51D. The fourth component near 270 km s/sup -1/ shows strong N V, C IV, and Si IV, more than is consistent with a wind-blown interstellar bubble; hence there is additional absorption outside the bubble. The overall pattern of absorbtion-line strengths suggests solar abundance ratios for the metals. The earlier evolution of the large stellar association LH 77 may have induced star formation leading to bright nebulosities around LH 77, one of them being the bubble N51D.

de Boer, K.S.; Nash, A.G.

1982-04-15T23:59:59.000Z

167

Environmental test report on the CTI-Cryogenics 1-watt integral Stirling cooler (long-life HD-1033d). Final report, 16 June-24 July 1988  

SciTech Connect (OSTI)

This final report describes and provides the data on the environmental testing of the CTI-Cryogenics 1-Watt Integral Stirling Cooler (Long-Life HD-1033D). The 1-Watt Integral Cooler (HD-1033B/C) is currently used in the M1 FLIR, M60 FLIR, and the Advanced Attack Helicopter FLIR. The long life cooler (clearance seal) improves life of the cooler by approximately two and one half times. C2NVEO evaluated the cooler performance at environmental extremes per the purchase description, PD-0182-001(CR). The cooler successfully passed all the environmental tests with no failures.

Doggett, G.; Dunmire, H.; Samuels, R.; Shaffer, J.

1989-04-01T23:59:59.000Z

168

Pulsation spectrum of Delta Sct stars: the binary HD 50870 as seen with CoRoT and HARPS  

E-Print Network [OSTI]

We present the results obtained with the CoRoT satellite for HD 50870, a Delta Sct star which was observed for 114.4 d. The 307,570 CoRoT datapoints were analysed with different techniques. The photometric observations were complemented over 15 nights of high-resolution spectroscopy with HARPS on a baseline of 25 d. Some uvby photometric observations were also obtained to better characterize the pulsation modes. HD 50870 proved to be a low-amplitude, long-period spectroscopic binary system seen almost pole-on (i~21 deg. The brighter component, which also has the higher rotational velocity (v sin i=37.5 km/s), is a delta Sct-type variable. There is a dominant axisymmetric mode (17.16 c/d). After the detection of about 250 terms (corresponding to an amplitude of about 0.045 mmag) a flat plateau appears in the power spectrum in the low-frequency region up to about 35 c/d. We were able to detect this plateau only thanks to the short cadence sampling of the CoRoT measurements (32 s). The density distribution vs. f...

Mantegazza, L; Michel, E; Rainer, M; Baudin, F; Hernandez, A Garcia; Semaan, T; Alvarez, M; Amado, P J; Garrido, R; Mathias, P; Moya, A; Suarez, J C; Auvergne, M; Baglin, A; Catala, C; Samadi, R

2012-01-01T23:59:59.000Z

169

Dynamical Masses for Low-Mass Pre-Main Sequence Stars: A Preliminary Physical Orbit for HD 98800 B  

E-Print Network [OSTI]

We report on Keck Interferometer observations of the double-lined binary (B) component of the quadruple pre-main sequence (PMS) system HD 98800. With these interferometric observations combined with astrometric measurements made by the Hubble Space Telescope Fine Guidance Sensors (FGS), and published radial velocity observations we have estimated preliminary visual and physical orbits of the HD 98800 B subsystem. Our orbit model calls for an inclination of 66.8 $\\pm$ 3.2 deg, and allows us to infer the masses and luminosities of the individual components. In particular we find component masses of 0.699 $\\pm$ 0.064 and 0.582 $\\pm$ 0.051 M$_{\\sun}$ for the Ba (primary) and Bb (secondary) components respectively. Modeling of the component SEDs finds temperatures and luminosities in agreement with previous studies, and coupled with the component mass estimates allows for comparison with PMS models in the low-mass regime with few empirical constraints. Solar abundance models seem to under-predict the inferred component temperatures and luminosities, while assuming slightly sub-solar abundances bring the models and observations into better agreement. The present preliminary orbit does not yet place significant constraints on existing pre-main sequence stellar models, but prospects for additional observations improving the orbit model and component parameters are very good.

A. F. Boden; A. I. Sargent; R. L. Akeson; J. M. Carpenter; G. Torres; D. W. Latham; D. R. Soderblom; E. Nelan; O. G. Franz; L. H. Wasserman

2005-08-15T23:59:59.000Z

170

A fresh look at the seismic spectrum of HD49933: analysis of 180 days of CoRoT photometry  

E-Print Network [OSTI]

Solar-like oscillations have now been observed in several stars, thanks to ground-based spectroscopic observations and space-borne photometry. CoRoT, which has been in orbit since December 2006, has observed the star HD49933 twice. The oscillation spectrum of this star has proven difficult to interpret. Thanks to a new timeseries provided by CoRoT, we aim to provide a robust description of the oscillations in HD49933, i.e., to identify the degrees of the observed modes, and to measure mode frequencies, widths, amplitudes and the average rotational splitting. Several methods were used to model the Fourier spectrum: Maximum Likelihood Estimators and Bayesian analysis using Markov Chain Monte-Carlo techniques. The different methods yield consistent result, and allow us to make a robust identification of the modes and to extract precise mode parameters. Only the rotational splitting remains difficult to estimate precisely, but is clearly relatively large (several microHz in size).

Benomar, O; Campante, T L; Chaplin, W J; García, R A; Gaulme, P; Toutain, T; Verner, G A; Appourchaux, T; Ballot, J; Barban, C; Elsworth, Y; Mathur, S; Mosser, B; Régulo, C; Roxburgh, I W; Auvergne, M; Baglin, A; Catala, C; Michel, E; Samadi, R

2009-01-01T23:59:59.000Z

171

The variability of the CoRoT target HD171834: gamma Dor pulsations and/or activity?  

E-Print Network [OSTI]

We present the preliminary results of a frequency and line-profile analysis of the CoRoT gamma Dor candidate HD171834. The data consist of 149 days of CoRoT light curves and a ground-based dataset of more than 1400 high-resolution spectra, obtained with six different instruments. Low-amplitude frequencies between 0 and 5 c/d, dominated by a frequency near 0.96 c/d and several of its harmonics, are detected. These findings suggest that HD171834 is not a mere gamma Dor pulsator and that stellar activity plays an important role in its variable behaviour. Based on CoRoT space data and on ground-based observations with ESO Telescopes at the La Silla Observatory under the ESO Large Programmes ESO LP 178.D-0361 and ESO LP 182.D-0356 (FEROS/2.2m and HARPS/3.6m), and data collected with FOCES/2.2m at the Centro Astronomico Hispano Aleman at Calar Alto, SOPHIE/1.93m at Observatoire de Haute Provence, FIES/NOT at Observatorio del Roque de los Muchachos, and HERCULES/1.0m at Mount John University Observatory.

Uytterhoeven, K; Baglin, A; Rainer, M; Poretti, E; Amado, P; Chapellier, E; Mantegazza, L; Pollard, K; Suarez, J C; Kilmartin, P M; Sato, K H; Garcia, R A; Auvergne, M; Michel, E; Samadi, R; Catala, C; Baudin, F

2011-01-01T23:59:59.000Z

172

Probing potassium in the atmosphere of HD 80606b with tunable filter transit spectrophotometry from the Gran Telescopio Canarias  

E-Print Network [OSTI]

We report observations of HD 80606 using the 10.4-m Gran Telescopio Canarias (GTC) and the OSIRIS tunable filter imager. We acquired very-high-precision, narrow-band photometry in four bandpasses around the K I absorption feature during the January 2010 transit of HD 80606b and during out-of-transit observations conducted in April 2010. We obtained differential photometric precisions as small as ~ 2.9 x 10^(-5). We find no significant difference between observations at 768.76 and 769.91 nm, which probe the K I line core. Yet, we observe significant differences [3.08 +/- 0.53 x 10^(-4) and 7.00 +/- 0.40 x 10^(-4)] between these observations and observations at two longer wavelengths that probe the K I wing (773.66 and 777.36 nm). The large change in the apparent planetary radius with wavelength (~3.6%) is much larger than the atmospheric scale height. This implies the observations probed the atmosphere at low pressures as well as a dramatic change in the pressure at which the slant optical depth reaches unity ...

Colon, Knicole D; Redfield, Seth; Fortney, Jonathan J; Shabram, Megan; Deeg, Hans J; Mahadevan, Suvrath

2010-01-01T23:59:59.000Z

173

Development of commercial NGV cylinders. Final report, September 1990-August 1991  

SciTech Connect (OSTI)

The state-of-the-art feasibility has been demonstrated for manufacturing and testing large, light-weight CNG cylinders for transit buses. The objective of the program is to establish the viability of this concept over a broad range of sizes and economic issues. To establish the viability of these cylinders, the latest requirements and standards were used in the program. The project included the design of various size tanks with regard to length as well as diameter. Tanks in two sizes were fabricated and submitted to test. The test program was established using the most severe tests from the U.S. and Canadian regulatory agencies. Upon successful completion of these tests, a qualification test report was prepared and submitted to the U.S. Department of Transportation for approval. The results of the program will provide the compressed natural gas vehicle industry with an economically viable, light-weight cylinder for both the original equipment manufacturers and the after market converters. The light-weight results in lower vehicle weight thus better fuel economy.

Berrisford, R.S.

1992-02-01T23:59:59.000Z

174

Growth of the NGV Market: Lessons Learned Roadmap for Infrastructure Development  

Broader source: Energy.gov [DOE]

Presented at Refueling Infrastructure for Alternative Fuel Vehicles: Lessons Learned for Hydrogen Conference, April 2-3, 2008, Sacramento, California

175

Charge asymmetry in rovibrationally excited HD{sup +} determined using explicitly correlated all-particle Gaussian functions  

SciTech Connect (OSTI)

Very accurate non-Born-Oppenheimer quantum-mechanical calculations are performed to determine the average values of the interparticle distances and the proton-deuteron density function for the rovibrationally excited HD{sup +} ion. The states corresponding to excitations to all bound vibrational states (v = 0, …, 22) and simultaneously excited to the first excited rotational state (N = 1) are considered. To describe each state up to 8000 explicitly correlated all-particle Gaussian functions are used. The nonlinear parameters of the Gaussians are variationally optimized using a procedure that employs the analytical energy gradient determined with respect to these parameters. The results show an increasing asymmetry in the electron distribution with the vibrational excitation as the electron density shifts towards deuteron and away from the proton.

Kirnosov, Nikita [Department of Physics, University of Arizona, Tucson, Arizona 85721 (United States)] [Department of Physics, University of Arizona, Tucson, Arizona 85721 (United States); Sharkey, Keeper L. [Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721 (United States)] [Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721 (United States); Adamowicz, Ludwik, E-mail: ludwik@u.arizona.edu [Department of Physics, University of Arizona, Tucson, Arizona 85721 (United States) [Department of Physics, University of Arizona, Tucson, Arizona 85721 (United States); Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721 (United States)

2013-11-28T23:59:59.000Z

176

Complete pure vibrational spectrum of HD calculated without the Born-Oppenheimer approximation and including relativistic corrections  

SciTech Connect (OSTI)

All 18 bound pure vibrational levels of the HD molecule have been calculated within the framework that does not assume the Born-Oppenheimer (BO) approximation. The nonrelativistic energies of the states have been corrected for the relativistic effects of the order of {alpha}{sup 2} (where {alpha} is the fine structure constant), calculated using the perturbation theory with the nonrelativistic non-BO wave functions being the zero-order approximation. The calculations were performed by expanding the non-BO wave functions in terms of one-center explicitly correlated Gaussian functions multiplied by even powers of the internuclear distance and by performing extensive optimization of the Gaussian nonlinear parameters. Up to 10 000 basis functions were used for each state.

Bubin, Sergiy [Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235 (United States); Stanke, Monika [Department of Physics, Nicholas Copernicus University, ul. Grudziadzka 5, PL-87-100 Torun (Poland); Adamowicz, Ludwik [Department of Chemistry, University of Arizona, Tucson, Arizona 85721 (United States); Department of Physics, University of Arizona, Tucson, Arizona 85721 (United States)

2011-04-15T23:59:59.000Z

177

Complete pure vibrational spectrum of HD calculated without the Born-Oppenheimer approximation and including relativistic corrections  

Science Journals Connector (OSTI)

All 18 bound pure vibrational levels of the HD molecule have been calculated within the framework that does not assume the Born-Oppenheimer (BO) approximation. The nonrelativistic energies of the states have been corrected for the relativistic effects of the order of ?2 (where ? is the fine structure constant), calculated using the perturbation theory with the nonrelativistic non-BO wave functions being the zero-order approximation. The calculations were performed by expanding the non-BO wave functions in terms of one-center explicitly correlated Gaussian functions multiplied by even powers of the internuclear distance and by performing extensive optimization of the Gaussian nonlinear parameters. Up to 10 000 basis functions were used for each state.

Sergiy Bubin; Monika Stanke; Ludwik Adamowicz

2011-04-29T23:59:59.000Z

178

Measurements of polarized photo-pion production on longitudinally polarized HD and Implications for Convergence of the GDH Integral  

E-Print Network [OSTI]

We report new measurements of inclusive pion production from frozen-spin HD for polarized photon beams covering the Delta(1232) resonance. These provide data simultaneously on both H and D with nearly complete angular distributions of the spin-difference cross sections entering the Gerasimov-Drell-Hearn (GDH) sum rule. Recent results from Mainz and Bonn exceed the GDH prediction for the proton by 22 microbarns, suggesting as yet unmeasured high-energy components. Our pi0 data reveal a different angular dependence than assumed in Mainz analyses and integrate to a value that is 18 microbarns lower, suggesting a more rapid convergence. Our results for deuterium are somewhat lower than published data, considerably more precise and generally lower than available calculations.

LEGS Spin Collaboration; S. Hoblit; A. M. Sandorfi; K. Ardashev; C. Bade; O. Bartalini; M. Blecher; A. Caracappa; A. D'Angelo; A. d'Angelo; R. Di Salvo; A. Fantini; C. Gibson; H. Glueckler; K. Hicks; A. Honig; T. Kageya; M. Khandaker; O. C. Kistner; S. Kizilgul; S. Kucuker; A. Lehmann; M. Lowry; M. Lucas; J. Mahon; L. Miceli; D. Moricciani; B. Norum; M. Pap; B. Preedom; H. Seyfarth; C. Schaerf; H. Stroeher; C. E. Thorn; C. S. Whisnant; K. Wang; X. Wei

2008-08-15T23:59:59.000Z

179

Characterisation of the magnetic fields of the Herbig Be stars HD 200775 and V380 0ri  

E-Print Network [OSTI]

The origin of the magnetic fields of the chemically peculiar main sequence Ap/Bp stars is still matter of intense debate. The recent discoveries of magnetic fields in Herbig Ae/Be stars using high resolution data obtained with the spectropolarimeter ESPaDOnS at CFHT provide a strong argument in favour of the fossil field hypothesis. Using a simple oblique rotator model of a centered dipole, we fit the Stokes V LSD profiles of two of these magnetic HAeBe stars, HD 200775 and V380 Ori, as well as their variations on timescales from days to months. We find that in both cases the dipole hypothesis is acceptable and we determine the rotation period, the angle between rotation and magnetic axes and the intensity of the magnetic field at pole.

Alecian, E; Catala, C; Bagnulo, S; Böhm, T; Bouret, J C; Donati, J F; Folsom, C P; Landstreet, J D; Silvester, J

2006-01-01T23:59:59.000Z

180

The unusual hydrocarbon emission from the early carbon star HD 100764: The connection between aromatics and aliphatics  

E-Print Network [OSTI]

We have used the Infrared Spectrograph (IRS) on the Spitzer Space Telescope to obtain spectra of HD 100764, an apparently single carbon star with a circumstellar disk. The spectrum shows emission features from polycyclic aromatic hydrocarbons (PAHs) that are shifted to longer wavelengths than normally seen, as characteristic of ``class C'' systems in the classification scheme of Peeters et al. All seven of the known class C PAH sources are illuminated by radiation fields that are cooler than those which typically excite PAH emission features. The observed wavelength shifts are consistent with hydrocarbon mixtures containing both aromatic and aliphatic bonds. We propose that the class C PAH spectra are distinctive because the carbonaceous material has not been subjected to a strong ultraviolet radiation field, allowing relatively fragile aliphatic materials to survive.

G. C. Sloan; M. Jura; W. W. Duley; K. E. Kraemer; J. Bernard-Salas; W. J. Forrest; B. Sargent; A. Li; D. J. Barry; C. J. Bohac; D. M. Watson; J. R. Houck

2007-05-07T23:59:59.000Z

Note: This page contains sample records for the topic "hd ngv potential" 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

HD/H2 as a probe of the roles of gas, dust, light, metallicity and cosmic rays in promoting the growth of molecular hydrogen in the diffuse interstellar medium  

E-Print Network [OSTI]

We modelled recent observations of UV absorption of HD and \\HH\\ in the Milky Way and toward damped/sub-damped Lyman alpha systems at z=0.18 and z $>$ 1.7. N(HD)/N(\\HH) ratios reflect the separate self-shieldings of HD and \\HH\\ and the coupling introduced by deuteration chemistry. Locally, observations are explained by diffuse molecular gas with $ 16 \\pccc \\la$ n(H) $\\la 128 \\pccc $ if the cosmic-ray ionization rate per H-nucleus \\zetaH $= 2\\times 10^{-16}\\ps$ as inferred from \\H3\\p\\ and OH\\p. The dominant influence on N(HD)/N(\\HH) is the cosmic-ray ionization rate with a much weaker downward dependence on n(H) at Solar metallicity, but dust-extinction can drive N(HD) higher as with N(\\HH). At z $>$ 1.7, N(HD) is comparable to the Galaxy but with 10x smaller N(\\HH) and somewhat smaller N(\\HH)/N(H I). Comparison of our Galaxy and the Magellanic Clouds shows that smaller \\HH/H is expected at sub-Solar metallicity and we show by modelling that HD/\\HH\\ increases with density at low metallicity, opposite to the Mil...

Liszt, H S

2014-01-01T23:59:59.000Z

182

Neutron-capture elements in the very metal-poor star HD88609: another st ar with excesses of light neutron-capture elements  

E-Print Network [OSTI]

We obtained a high resolution, high signal-to-noise UV-blue spectrum of the extremely metal-poor red giant HD88609 to determine the abundances of heavy elements. Nineteen neutron-capture elements are detected in the spectrum. Our analysis revealed that this object has large excesses of light neutron-capture elements while heavy neutron-capture elements are deficient. The abundance pattern shows a continuously decreasing trend, as a function of atomic number, from Sr to Yb, which is quite different from those in stars with excesses of r-process elements. Such an abundance pattern is very similar to that of HD122563 that was studied by our previous work. The results indicate that the abundance pattern found in the two stars could represent the pattern produced by the nucleosynthesis process that provided light neutron-capture elements in the very early Galaxy.

Satoshi Honda; Wako Aoki; Yuhri Ishimaru; Shinya Wanajo

2007-05-27T23:59:59.000Z

183

The qWR star HD 45166. II. Fundamental stellar parameters and evidence of a latitude-dependent wind  

E-Print Network [OSTI]

The enigmatic object HD 45166 is a qWR star in a binary system with an orbital period of 1.596 day, and presents a rich emission-line spectrum in addition to absorption lines from the companion star (B7 V). As the system inclination is very small (i=0.77 +- 0.09 deg), HD 45166 is an ideal laboratory for wind-structure studies. The goal of the present paper is to determine the fundamental stellar and wind parameters of the qWR star. A radiative transfer model for the wind and photosphere of the qWR star was calculated using the non-LTE code CMFGEN. The wind asymmetry was also analyzed using a recently-developed version of CMFGEN to compute the emerging spectrum in two-dimensional geometry. The temporal-variance spectrum (TVS) was calculated for studying the line-profile variations. Abundances, stellar and wind parameters of the qWR star were obtained. The qWR star has an effective temperature of Teff=50000 +- 2000 K, a luminosity of log(L/Lsun)=3.75 +- 0.08, and a corresponding photospheric radius of Rphot=1.00 Rsun. The star is helium-rich (N(H)/N(He) = 2.0), while the CNO abundances are anomalous when compared either to solar values, to planetary nebulae, or to WR stars. The mass-loss rate is Mdot = 2.2 . 10^{-7} Msun/yr, and the wind terminal velocity is vinf=425 km/s. The comparison between the observed line profiles and models computed under different latitude-dependent wind densities strongly suggests the presence of an oblate wind density enhancement, with a density contrast of at least 8:1 from equator to pole. If a high velocity polar wind is present (~1200 km/s), the minimum density contrast is reduced to 4:1. The wind parameters determined are unusual when compared to O-type stars or to typical WR stars. (abridged)

J. H. Groh; A. S. Oliveira; J. E. Steiner

2008-04-10T23:59:59.000Z

184

Discovery of a strong magnetic field on the O star HD 191612: new clues to the future of theta1 Orionis C?  

E-Print Network [OSTI]

From observations made with the ESPaDOnS spectropolarimeter, recently installed on the 3.6-m Canada--France--Hawaii Telescope, we report the discovery of a strong magnetic field in the Of?p spectrum variable HD 191612 -- only the second known magnetic O star (following theta1 Ori C). The stability of the observed Zeeman signature over four nights of observation, together with the non-rotational shape of line profiles, argue that the rotation period of HD 191612 is significantly longer than the 9-d value previously proposed. We suggest that the recently identified 538-d spectral-variability period is the rotation period, in which case the observed line-of-sight magnetic field of -220+-38 G implies a large-scale field (assumed dipolar) with a polar strength of about -1.5 kG. If confirmed, this scenario suggests that HD 191612 is, essentially, an evolved version of the near-ZAMS magnetic O star theta1 Ori C, but with an even stronger field (about 15 kG at an age similar to that of theta1Ori C). We suggest that t...

Donati, J F; Bouret, J C; Petit, P; Catala, C; Landstreet, J D; Donati, JF; Howarth, ID; Bouret, JC; Landstreet, JD

2006-01-01T23:59:59.000Z

185

The dramatic change of the fossil magnetic field of HD 190073: evidence of the birth of the convective core in a Herbig star ?  

E-Print Network [OSTI]

In the context of the ESPaDOnS and Narval spectropolarimetric surveys of Herbig Ae/Be stars, we discovered and then monitored the magnetic field of HD 190073 over more than four years, from 2004 to 2009. Our observations all displayed similar Zeeman signatures in the Stokes V spectra, indicating that HD 190073 hosted an aligned dipole, stable over many years, consistent with a fossil origin. We obtained new observations of the star in 2011 and 2012 and detected clear variations of the Zeeman signature on timescales of days to weeks, indicating that the configuration of its field has changed between 2009 and 2011. Such a sudden change of external structure of a fossil field has never previously been observed in any intermediate or high-mass star. HD 190073 is an almost entirely radiative pre-main sequence star, probably hosting a growing convective core. We propose that this dramatic change is the result of the interaction between the fossil field and the ignition of a dynamo field generated in the newly-born ...

Alecian, E; Mathis, S; Catala, C; Kochukhov, O; Landstreet, J

2013-01-01T23:59:59.000Z

186

Three-dimensional magnetic and abundance mapping of the cool Ap star HD 24712 II. Two-dimensional Magnetic Doppler Imaging in all four Stokes parameters  

E-Print Network [OSTI]

Aims: We present a magnetic Doppler imaging study from all Stokes parameters of the cool, chemically peculiar star HD 24712. This is the very first such analysis performed at a resolving power exceeding 10^5. Methods: The analysis is performed on the basis of phase-resolved observations of line profiles in all four Stokes parameters obtained with the HARPSpol instrument attached at the 3.6-m ESO telescope. We use the magnetic Doppler imaging code, INVERS10, which allows us to derive the magnetic field geometry and surface chemical abundance distributions simultaneously. Results: We report magnetic maps of HD 24712 recovered from a selection of FeI, FeII, NdIII, and NaI lines with strong polarization signals in all Stokes parameters. Our magnetic maps successfully reproduce most of the details available from our observation data. We used these magnetic field maps to produce abundance distribution map of Ca. This new analysis shows that the surface magnetic field of HD 24712 has a dominant dipolar component wit...

Rusomarov, N; Ryabchikova, T; Piskunov, N

2014-01-01T23:59:59.000Z

187

The pre-main sequence star HD 34282: A very short period delta Scuti-type pulsator  

E-Print Network [OSTI]

HD 34282 has been found to pulsate during a systematic search for short-term photometric variability in Herbig Ae/Be stars with the goal of determining the position and size of the pre-main sequence instability strip. Simultaneous Stromgren photometry is used in the frequency analysis, yielding two frequencies with values of nu1=79.5 and nu2=71.3 c/d. The light curve with the largest amplitude is that of the u band. This behaviour, which is not common for delta Scuti stars, is explained as pulsation in a high radial order in stars near the blue edge of the instability strip. The main period, with a value of 18.12 min, represents the shortest period observed so far for a delta Scuti-type pulsator. A seismic modelling, including instability predictions and rotation effects, has been attempted. It is found that both main sequence and pre-main sequence models predict modes in the range of 56 to 82 c/d (between 648 and 949 microHz), corresponding to oscillations of radial order n from 6 to 8. The highest of the ob...

Amado, P J; Suárez, J C; Martin-Ruiz, S; Garrido, R; Rodríguez, E; Catala, C; Goupil, M J

2004-01-01T23:59:59.000Z

188

ALMA observations of the molecular gas in the debris disk of the 30 Myr old star HD 21997  

E-Print Network [OSTI]

The 30 Myr old A3-type star HD 21997 is one of the two known debris dust disks having a measurable amount of cold molecular gas. With the goal of understanding the physical state, origin, and evolution of the gas in young debris disks, we obtained CO line observations with the Atacama Large Millimeter/submillimeter Array (ALMA). Here we report on the detection of 12CO and 13CO in the J=2-1 and J=3-2 transitions and C18O in the J=2-1 line. The gas exhibits a Keplerian velocity curve, one of the few direct measurements of Keplerian rotation in young debris disks. The measured CO brightness distribution could be reproduced by a simple star+disk system, whose parameters are r_in Sun, and i = 32.6 +/- 3.1 degrees. The total CO mass, as calculated from the optically thin C18O line, is about (4-8) x 10^-2 M_Earth, while the CO line ratios suggest a radiation temperature on the order of 6-9 K. Comparing our results with those obtained for the dust component of th...

Kóspál, Á; Juhász, A; Ábrahám, P; Apai, D; Csengeri, T; Grady, C A; Henning, Th; Hughes, A M; Kiss, Cs; Pascucci, I; Schmalzl, M

2013-01-01T23:59:59.000Z

189

Toxicology Studies on Lewisite and Sulfur Mustard Agents: Subchronic Toxicity of Sulfur Mustard (HD) In Rats Final Report  

SciTech Connect (OSTI)

Occupational health standards have not been established for sulfur mustard [bis(2- chlorethyl)-sulfide], a strong alkylating agent with known mutagenic properties. Seventytwo Sprague-Dawley rats of each sex, 6-7 weeks old, were divided into six groups (12/group/ sex) and gavaged with either 0, 0.003 , 0.01 , 0.03 , 0.1 or 0.3 mg/kg of sulfur mustard in sesame oil 5 days/week for 13 weeks. No dose-related mortality was observed. A significant decrease (P ( 0.05) in body weight was observed in both sexes of rats only in the 0.3 mg/kg group. Hematological evaluations and clinical chemistry measurements found no consistent treatment-related effects at the doses studied. The only treatment-related lesion associated with gavage exposure upon histopathologic evaluation was epithelial hyperplasia of the forestomach of both sexes at 0.3 mg/kg and males at 0.1 mg/kg. The hyperplastic change was minimal and characterized by cellular disorganization of the basilar layer, an apparent increase in mitotic activity of the basilar epithelial cells, and thickening of the epithelial layer due to the apparent increase in cellularity. The estimated NOEL for HD in this 90-day study is 0.1 mg/kg/day when administered orally.

Sasser, L. B.; Miller, R. A.; Kalkwarf, D, R.; Buschbom, R. L.; Cushing, J. A.

1989-06-30T23:59:59.000Z

190

Ab initio calculation of the line strengths in the electric dipole vibration-rotation spectrum of the HD molecule  

Science Journals Connector (OSTI)

The perturbation theory expression for the HD molecule vibration-rotation dipole-transition probabilities is cast into the form of an instantaneous dipole-moment function D(R). Two large components of D(R) can be obtained from accurately known ground-electronic-state expectation values, whereas the rest is computed by a sum-over-states procedure similar to the one we used previously for the dynamic polarizability of H2. From this D(R) we compute dipole-transition matrix elements for the 0-0 through 6-0 vibrational bands, for all P and R branch lines with Ji?3. Our results agree well with the recent calculations of Wolniewicz [Can. J. Phys. 53, 1207 (1975); 54, 672 (1976)]. They also agree well with experiment for the 1-0 through 5-0 bands, but, like the results of Wolniewicz, are a factor of approximately ?2 larger than the 0-0 band results of M. Trefler and H. P. Gush [Phys. Rev. Lett. 20, 703 (1968)].

A. Lewis Ford and J. C. Browne

1977-11-01T23:59:59.000Z

191

Possible detection of phase changes from the non-transiting planet HD 46375b by CoRoT  

E-Print Network [OSTI]

The present work deals with the detection of phase changes in an exoplanetary system. HD 46375 is a solar analog known to host a non-transiting Saturn-mass exoplanet with a 3.0236 day period. It was observed by the CoRoT satellite for 34 days during the fall of 2008. We attempt to identify at optical wavelengths, the changing phases of the planet as it orbits its star. We then try to improve the star model by means of a seismic analysis of the same light curve and the use of ground-based spectropolarimetric observations. The data analysis relies on the Fourier spectrum and the folding of the time series. We find evidence of a sinusoidal signal compatible in terms of both amplitude and phase with light reflected by the planet. Its relative amplitude is Delta Fp/F* = [13.0, 26.8] ppm, implying an albedo A=[0.16, 0.33] or a dayside visible brightness temperature Tb ~ [1880,2030] K by assuming a radius R=1.1 R_Jup and an inclination i=45 deg. Its orbital phase differs from that of the radial-velocity signal by at...

Gaulme, P; Guillot, T; Mosser, B; Mary, D; Weiss, W W; Schmider, F -X; Bourguignon, S; Deeg, H J; Régulo, C; Aigrain, S; Schneider, J; Bruntt, H; Deheuvels, S; Donati, J -F; Appourchaux, T; Auvergne, M; Baglin, A; Baudin, F; Catala, C; Michel, E; Samadi, R; 10.1051/0004-6361/201014303

2010-01-01T23:59:59.000Z

192

The CoRoT target HD175726: an active star with weak solar-like oscillations  

E-Print Network [OSTI]

Context. The CoRoT short runs give us the opportunity to observe a large variety of late-type stars through their solar-like oscillations. We report observations of the star HD175726 that lasted for 27 days during the first short run of the mission. The time series reveals a high-activity signal and the power spectrum presents an excess due to solar-like oscillations with a low signal-to-noise ratio. Aims. Our aim is to identify the most efficient tools to extract as much information as possible from the power density spectrum. Methods. The most productive method appears to be the autocorrelation of the time series, calculated as the spectrum of the filtered spectrum. This method is efficient, very rapid computationally, and will be useful for the analysis of other targets, observed with CoRoT or with forthcoming missions such as Kepler and Plato. Results. The mean large separation has been measured to be 97.2+-0.5 microHz, slightly below the expected value determined from solar scaling laws.We also show stro...

Mosser, B; Appourchaux, T; Barban, C; Baudin, F; Boumier, P; Bruntt, H; Catala, C; Deheuvels, S; García, R A; Gaulme, P; Regulo, C; Roxburgh, I; Samadi, R; Verner, G; Auvergne, M; Baglin, A; Ballot, J; Benomar, O; Mathur, S

2009-01-01T23:59:59.000Z

193

HD 174884: a strongly eccentric, short-period early-type binary system discovered by CoRoT  

E-Print Network [OSTI]

Accurate photometric CoRoT space observations of a secondary seismological target, HD 174884, led to the discovery that this star is an astrophysically important double-lined eclipsing spectroscopic binary in an eccentric orbit (e of about 0.3), unusual for its short (3.65705d) orbital period. The high eccentricity, coupled with the orientation of the binary orbit in space, explains the very unusual observed light curve with strongly unequal primary and secondary eclipses having the depth ratio of 1-to-100 in the CoRoT 'seismo' passband. Without the high accuracy of the CoRoT photometry, the secondary eclipse, 1.5 mmag deep, would have gone unnoticed. A spectroscopic follow-up program provided 45 high dispersion spectra. The analysis of the CoRoT light curve was performed with an adapted version of PHOEBE that supports CoRoT passbands. The final solution was obtained by simultaneous fitting of the light and the radial velocity curves. Individual star spectra were derived by spectrum disentangling. The uncerta...

Maceroni, C; Michel, E; Harmanec, P; Prsa, A; Briquet, M; Niemczura, E; Morel, T; Ladjal, D; Auvergne, M; Baglin, A; Baudin, F; Catala, C; Samadi, R; Aerts, C

2009-01-01T23:59:59.000Z

194

Magnesium in the atmosphere of the planet HD209458b: Observations of the thermosphere-exosphere transition region  

E-Print Network [OSTI]

We report new near ultraviolet HST/STIS observations of atmospheric absorptions during the planetary transit of HD209458b. We detect absorption in atomic magnesium (MgI), while no signal has been detected in the lines of singly ionized magnesium (MgII). We measure the MgI atmospheric absorption to be 6.2+/-2.9% in the velocity range from -62 to -19 km/s. The detection of atomic magnesium in the planetary upper atmosphere at a distance of several planetary radii gives a first view into the transition region between the thermosphere and the exobase, where atmospheric escape takes place. We estimate the electronic densities needed to compensate for the photo-ionization by dielectronic recombination of Mg+ to be in the range of 10^8-10^9 cm^{-3}. Our finding is in excellent agreement with model predictions at altitudes of several planetary radii. We observe MgI atoms escaping the planet, with a maximum radial velocity (in the stellar rest frame) of -60 km/s. Because magnesium is much heavier than hydrogen, the es...

Vidal-Madjar, A; Bourrier, V; Désert, J -M; Ballester, G; Etangs, A Lecavelier des; Sing, D K; Ehrenreich, D; Ferlet, R; Hébrard, G; McConnell, J C

2013-01-01T23:59:59.000Z

195

HIGH-RESOLUTION NEAR-INFRARED SPECTROSCOPY OF HD 100546. I. ANALYSIS OF ASYMMETRIC RO-VIBRATIONAL OH EMISSION LINES  

SciTech Connect (OSTI)

We present observations of ro-vibrational OH and CO emission from the Herbig Be star HD 100546. The emission from both molecules arises from the inner region of the disk extending from approximately 13 AU from the central star. The velocity profiles of the OH lines are narrower than the velocity profile of the [O I] {lambda}6300 line, indicating that the OH in the disk is not cospatial with the O I. This suggests that the inner optically thin region of the disk is largely devoid of molecular gas. Unlike the ro-vibrational CO emission lines, the OH lines are highly asymmetric. We show that the average CO and average OH line profiles can be fit with a model of a disk comprised of an eccentric inner wall and a circular outer disk. In this model, the vast majority of the OH flux (75%) originates from the inner wall, while the vast majority of the CO flux (65%) originates on the surface of the disk at radii greater than 13 AU. Eccentric inner disks are predicted by hydrodynamic simulations of circumstellar disks containing an embedded giant planet. We discuss the implications of such a disk geometry in light of models of planet-disk tidal interactions and propose alternative explanations for the origin of the asymmetry.

Liskowsky, Joseph P.; Brittain, Sean D. [Department of Physics and Astronomy, 118 Kinard Laboratory, Clemson University, Clemson, SC 29634 (United States); Najita, Joan R. [National Optical Astronomy Observatory, 950 N. Cherry Ave., Tucson, AZ 85719 (United States); Carr, John S. [Naval Research Laboratory, Code 7211, Washington, DC 20375 (United States); Doppmann, Greg W. [W. M. Keck Observatory, 65-1120 Mamalahoa Hwy, Kamuela, HI 96743 (United States); Troutman, Matthew R., E-mail: sbritt@clemson.edu, E-mail: najita@noao.edu, E-mail: carr@nrl.navy.mil, E-mail: gdoppmann@keck.hawaii.edu, E-mail: troutmanm@umsl.edu [Department of Physics and Astronomy, University of Missouri-St. Louis, St. Louis, MO 63121 (United States)

2012-12-01T23:59:59.000Z

196

HIGH-RESOLUTION NEAR-INFRARED SPECTROSCOPY OF HD 100546. II. ANALYSIS OF VARIABLE ROVIBRATIONAL CO EMISSION LINES  

SciTech Connect (OSTI)

We present observations of rovibrational CO in HD 100546 from four epochs spanning 2003 January through 2010 December. We show that the equivalent widths of the CO lines vary during this time period with the v = 1-0 CO lines brightening more than the UV fluoresced lines from the higher vibrational states. While the spectroastrometric signal of the hot band lines remains constant during this period, the spectroastrometric signal of the v = 1-0 lines varies substantially. At all epochs, the spectroastrometric signals of the UV fluoresced lines are consistent with the signal one would expect from gas in an axisymmetric disk. In 2003, the spectroastrometric signal of the v = 1-0 P26 line was symmetric and consistent with emission from an axisymmetric disk. However, in 2006 there was no spatial offset of the signal detected on the red side of the profile, and in 2010 the spectroastrometric offset was yet more strongly reduced toward zero velocity. A model is presented that can explain the evolution of the equivalent width of the v = 1-0 P26 line and its spectroastrometric signal by adding to the system a compact source of CO emission that orbits the star near the inner edge of the disk. We hypothesize that such emission may arise from a circumplanetary disk orbiting a gas giant planet near the inner edge of the circumstellar disk. We discuss how this idea can be tested observationally and be distinguished from an alternative interpretation of random fluctuations in the disk emission.

Brittain, Sean D.; Liskowsky, Joseph [Department of Physics and Astronomy, 118 Kinard Laboratory, Clemson University, Clemson, SC 29634 (United States); Najita, Joan R. [National Optical Astronomy Observatory, 950 N. Cherry Ave., Tucson, AZ 85719 (United States); Carr, John S. [Naval Research Laboratory, Code 7211, Washington, DC 20375 (United States); Troutman, Matthew R. [Department of Physics and Astronomy, University of Missouri - St. Louis, St. Louis, MO 63121 (United States); Doppmann, Greg W., E-mail: sbritt@clemson.edu, E-mail: jliskow@clemson.edu, E-mail: najita@noao.edu, E-mail: carr@nrl.navy.mil, E-mail: troutmanm@umsl.edu, E-mail: gdoppmann@keck.hawaii.edu [W. M. Keck Observatory, 65-1120 Mamalahoa Hwy, Kamuela, HI 96743 (United States)

2013-04-20T23:59:59.000Z

197

Rotational spectrum of HD perturbed by He or Ar gases: The effects of rotationally inelastic collisions on the interference between allowed and collisionally induced components  

Science Journals Connector (OSTI)

The spectral line shapes for the HD rotational spectra perturbed by He and Ar gases, which show interference between allowed and collisionally induced dipole transitions, are calculated including the effects of inelastic rotational collisions. The general parametrization of the line shape, including inelastic collisions, requires six independent real parameters as opposed to four in the theory of Herman, Tipping, and Poll [Phys. Rev. A 20, 2006 (1979)]. Semiclassical calculations based on classical trajectories indicate the importance of the inelastic effects and show qualitative agreement with the experimental parameters. However, it is clear that a full explanation of experimental data will eventually require a full quantum treatment.

Bo Gao; J. Cooper; G. C. Tabisz

1992-11-01T23:59:59.000Z

198

The tip of the iceberg: the frequency content of the Delta Sct star HD 50844 from CoRoT space photometry  

E-Print Network [OSTI]

It has been suggested that the detection of a wealth of very low amplitude modes in Delta Sct stars was only a matter of signal--to--noise ratio. Access to this treasure, impossible from the ground, is one of the scientific aims of the space mission CoRoT, developed and operated by CNES. This work presents the results obtained on HD 50844: the 140,016 datapoints allowed us to reach the level of 10^{-5} mag in the amplitude spectra. The frequency analysis of the CoRoT timeseries revealed hundreds of terms in the frequency range 0--30 d^{-1}. The initial guess that Delta Sct stars have a very rich frequency content is confirmed. The spectroscopic mode identification gives theoretical support since very high--degree modes (up to ell=14) are identified. We also prove that cancellation effects are not sufficient in removing the flux variations associated to these modes at the noise level of the CoRoT measurements. The ground--based observations indicate that HD 50844 is an evolved star that is slightly underabunda...

Poretti, E; Rainer, M; Uytterhoeven, K; Michel, E; Baglin, A; Auvergne, M; Catala, C; Samadi, R; Rodríguez, E; Garrido, R; Amado, P; Martin-Ruiz, S; Moya, A; Suarez, C; Baudin, F; Zima, W; Alvarez, M; Mathias, P; Paparo, M; Papics, P; Plachy, E

2009-01-01T23:59:59.000Z

199

An in-depth study of HD 174966 with CoRoT photometry and HARPS spectroscopy. Large separation as a new observable for \\delta Sct stars  

E-Print Network [OSTI]

The aim of this work was to use a multi-approach technique to derive the most accurate values possible of the physical parameters of the \\delta Sct star HD174966. In addition, we searched for a periodic pattern in the frequency spectra with the goal of using it to determine the mean density of the star. First, we extracted the frequency content from the CoRoT light curve. Then, we derived the physical parameters of HD174966 and carried a mode identification out from the spectroscopic and photometric observations. We used this information to look for the models fulfilling all the conditions and discussed the inaccuracies of the method because of the rotation effects. In a final step, we searched for patterns in the frequency set using a Fourier transform, discussed its origin and studied the possibility of using the periodicity to obtain information about the physical parameters of the star. A total of 185 peaks were obtained from the Fourier analysis of the CoRoT light curve, being almost all reliable pulsati...

Hernández, A García; Michel, E; Suárez, J C; Poretti, E; Martín-Ruíz, S; Amado, P J; Garrido, R; Rodríguez, E; Rainer, M; Uytterhoeven, K; Rodrigo, C; Solano, E; Rodón, J R; Mathias, P; Rolland, A; Auvergne, M; Baglin, A; Baudin, F; Catala, C; Samadi, R

2013-01-01T23:59:59.000Z

200

A search for TiO in the optical high-resolution transmission spectrum of HD 209458b: Hindrance due to inaccuracies in the line database  

E-Print Network [OSTI]

The spectral signature of an exoplanet can be separated from the spectrum of its host star using high-resolution spectroscopy. During such observations, the radial component of the planet's orbital velocity changes, resulting in a significant Doppler shift which allows its spectral features to be extracted. Aims: In this work, we aim to detect TiO in the optical transmission spectrum of HD 209458b. Gaseous TiO has been suggested as the cause of the thermal inversion layer invoked to explain the dayside spectrum of this planet. Method: We used archival data from the 8.2m Subaru Telescope taken with the High Dispersion Spectrograph of a transit of HD209458b in 2002. We created model transmission spectra which include absorption by TiO, and cross-correlated them with the residual spectral data after removal of the dominating stellar absorption features. We subsequently co-added the correlation signal in time, taking into account the change in Doppler shift due to the orbit of the planet. Results: We detect no si...

Hoeijmakers, H J; Snellen, I A G; Brogi, M; Birkby, J L; Schwarz, H

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hd ngv potential" 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

Mapping Biomass Distribution Potential  

E-Print Network [OSTI]

Mapping Biomass Distribution Potential Michael Schaetzel Undergraduate ? Environmental Studies ? University of Kansas L O C A T S I O N BIOMASS ENERGY POTENTIAL o According to DOE, Biomass has the potential to provide 14% of... the nation’s power o Currently 1% of national power supply o Carbon neutral? combustion of biomass is part of the natural carbon cycle o Improved crop residue management has potential to benefit environment, producers, and economy Biomass Btu...

Schaetzel, Michael

2010-11-18T23:59:59.000Z

202

An empirical analysis on the adoption of alternative fuel vehicles:The case of natural gas vehicles  

E-Print Network [OSTI]

U.S. U.S. conventional B A NGV Penetration Rate Fig. 7.versus NGV market penetration rate in case-study countries.Zealand had an NGV penetration rate just over 10% in 1985,

Yeh, Sonia

2007-01-01T23:59:59.000Z

203

Dynamics of the Eley-Rideal Reaction of D Atoms with H Atoms Adsorbed on Cu(111): Vibrational and Rotational State Distributions of the HD Product  

Science Journals Connector (OSTI)

We have determined the internal-state distribution for the HD product of the reaction of gas-phase D atoms with H atoms chemisorbed on Cu(111). The populations of the vibrational states v=0, 1, 2, and 3 are comparable, while that for v=4 is considerably smaller, giving a mean vibrational energy of ?0.7 eV. The mean rotational energy falls with increasing v, from ?0.5 eV for v=0 to <0.2 eV for v=4, with an overall mean rotational energy of ?0.4 eV. The maximum internal energy observed is ?2.3 eV, consistent with the total energy available to the product. Results are compared with recent calculations.

C. T. Rettner and D. J. Auerbach

1995-05-29T23:59:59.000Z

204

CoRoT's view on variable B8/9 stars: spots versus pulsations: Evidence for differential rotation in HD 174648  

E-Print Network [OSTI]

Context. There exist few variability studies of stars in the region in the Hertzsprung-Russell diagram between the A and B-star pulsational instability strips. With the aid of the high precision continuous measurements of the CoRoT space satellite, low amplitudes are more easily detected, making a study of this neglected region worthwhile. Aims. We collected a small sample of B stars observed by CoRoT to determine the origin of the different types of variability observed. Methods. We combine literature photometry and spectroscopy to measure the fundamental parameters of the stars in the sample, and compare asteroseismic modelling of the light curves with (differentially rotating) spotted star models. Results. We found strong evidence for the existence of spots and differential rotation in HD 174648, and formulated hypotheses for their origin. We show that the distinction between pulsations and rotational modulation is difficult to make solely based on the light curve, especially in slowly rotating stars.

Degroote, P; Samadi, R; Aerts, C; Kurtz, D W; Noels, A; Miglio, A; Montalban, J; Bloemen, S; Baglin, A; Baudin, F; Catala, C; Michel, E; Auvergne, M

2011-01-01T23:59:59.000Z

205

Potential Release Sites  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

PRS PRS Potential Release Sites Legacy sites where hazardous materials are found to be above acceptable levels are collectively called potential release sites. Contact Environmental Communication & Public Involvement P.O. Box 1663 MS M996 Los Alamos, NM 87545 (505) 667-0216 Email Less than 10 percent of the total number of potential release sites need to go through the full corrective action process. What are potential release sites? Potential release sites are areas around the Laboratory and the town of Los Alamos at which hazardous materials from past activities have been found. Some examples of potential release sites include septic tanks and associated drain lines chemical storage areas wastewater outfalls material disposal areas incinerators sumps firing ranges

206

Pistons modeled by potentials  

E-Print Network [OSTI]

In this article we consider a piston modelled by a potential in the presence of extra dimensions. We analyze the functional determinant and the Casimir effect for this configuration. In order to compute the determinant and Casimir force we employ the zeta function scheme. Essentially, the computation reduces to the analysis of the zeta function associated with a scalar field living on an interval $[0,L]$ in a background potential. Although, as a model for a piston, it seems reasonable to assume a potential having compact support within $[0,L]$, we provide a formalism that can be applied to any sufficiently smooth potential.

Guglielmo Fucci; Klaus Kirsten; Pedro Morales

2011-06-03T23:59:59.000Z

207

Energy Resource Potential  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Resource Potential Resource Potential of Methane Hydrate Energy Resource Potential An introduction to the science and energy potential of a unique resource Disclaimer 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. 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.

208

potential wave energy  

Science Journals Connector (OSTI)

potential wave energy ? potentielle Wellenenergie f [Der für die Auslenkung des Wasserspiegels zum Ruhewasserspiegel erforderliche Teil der Wellenenergie, die mit der Wellengeschwindigkeit fortbewegt...

2014-08-01T23:59:59.000Z

209

Hydropower Potential Screening Study  

E-Print Network [OSTI]

Hydropower Potential Screening Study Gillian Charles GRAC 5/28/14 #12;Latest Hydropower Potential Study Creating a Buzz 2014 DOE study on undeveloped stream reaches 84.7 GW undeveloped hydropower in undeveloped stream reaches hydropower in the PNW #12;Studies at both National

210

Alternative Fuels Data Center  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Natural Gas Vehicle (NGV) and Fueling Infrastructure Grants The Texas Commission on Environmental Quality (TCEQ) administers the NGV Grant Program (Program) as part of the Texas...

211

Hydrogen’s Potential  

Science Journals Connector (OSTI)

Estimates of future demand for non-fossil produced hydrogen and of its potential are oriented toward ... to the environment as the present fossil energy economy [10.4, 10.9].

J. Nitsch; C. Voigt

1988-01-01T23:59:59.000Z

212

Global Biomass Energy Potential  

Science Journals Connector (OSTI)

The intensive use of renewable energy is one of the options to stabilize...2...atmospheric concentration at levels of 350 to 550ppm. A recent evaluation of the global potential of primary renewable energy carried...

Jos#X00C9; Roberto Moreira

2006-03-01T23:59:59.000Z

213

Logistic Map Potentials  

E-Print Network [OSTI]

We develop and illustrate methods to compute all single particle potentials that underlie the logistic map, x --> sx(1-x) for 02. We illustrate the methods numerically for the cases s=5/2 and s=10/3.

Thomas Curtright; Andrzej Veitia

2010-05-27T23:59:59.000Z

214

Ground-based observations of the beta Cephei CoRoT main target HD 180642: abundance analysis and mode identification  

E-Print Network [OSTI]

The known beta Cephei star HD 180642 was observed by the CoRoT satellite in 2007. From the very high-precision light curve, its pulsation frequency spectrum could be derived for the first time (Degroote and collaborators). In this paper, we obtain additional constraints for forthcoming asteroseismic modeling of the target. Our results are based on both extensive ground-based multicolour photometry and high-resolution spectroscopy. We determine T_eff = 24 500+-1000 K and log g = 3.45+-0.15 dex from spectroscopy. The derived chemical abundances are consistent with those for B stars in the solar neighbourhood, except for a mild nitrogen excess. A metallicity Z = 0.0099+-0.0016 is obtained. Three modes are detected in photometry. The degree l is unambiguously identified for two of them: l = 0 and l = 3 for the frequencies 5.48694 1/d and 0.30818 1/d, respectively. The radial mode is non-linear and highly dominant with an amplitude in the U-filter about 15 times larger than the strongest of the other modes. For th...

Briquet, M; Morel, T; Aerts, C; De Cat, P; Mathias, P; Lefever, K; Miglio, A; Poretti, E; Martin-Ruiz, S; Paparo, M; Rainer, M; Carrier, F; Gutiérrez-Soto, J; Valtier, J C; Benko, J M; Bognár, Z; Niemczura, E; Amado, P J; Suárez, J C; Moya, A; Rodriguez-Lopez, C; Garrido, R

2009-01-01T23:59:59.000Z

215

Two Super-Earths Orbiting the Solar Analogue HD41248 on the edge of a 7:5 Mean Motion Resonance  

E-Print Network [OSTI]

The number of multi-planet systems known to be orbiting their host stars with orbital periods that place them in mean motion resonances is growing. For the most part, these systems are in first-order resonances and dynamical studies have focused their efforts towards understanding the origin and evolution of such dynamically resonant commensurabilities. We report here the discovery of two super-Earths that are close to a second-order dynamical resonance, orbiting the metal-poor ([Fe/H]=-0.43 dex) and inactive G2V star HD41428. We analysed 62 HARPS archival radial velocities for this star, that until now, had exhibited no evidence for planetary companions. Using our new Bayesian Doppler signal detection algorithm, we find two significant signals in the data, with periods of 18.357 days and 25.648 days, indicating they could be part of a 7:5 second-order mean motion resonance. Both semi-amplitudes are below 3m/s and the minimum masses of the pair are 12.3 and 8.6Mearth, respectively. Our simulations found that ...

Jenkins, James S; Brasser, Ramon; Ivanyuk, Oleksiy; Murgas, Felipe

2013-01-01T23:59:59.000Z

216

Constraining the structure of the transition disk HD 135344B (SAO 206462) by simultaneous modeling of multi-wavelength gas and dust observations  

E-Print Network [OSTI]

HD 135344B is an accreting (pre-) transition disk which displays emission of warm CO extending tens of AU inside its 30 AU dust cavity. We employ the dust radiative transfer code MCFOST and the thermo-chemical code ProDiMo to derive the disk structure from the simultaneous modeling of the spectral energy distribution (SED), VLT/CRIRES CO P(10) 4.75 micron, Herschel/PACS [O I] 63 micron, Spitzer-IRS, and JCMT 12CO J=3-2 spectra, VLTI/PIONIER H-band visibilities, and constraints from (sub-)mm continuum interferometry and near-IR imaging. We found a disk model able to describe simultaneously the current observations. This disk has the following structure: (1) to reproduce the SED, the near-IR interferometry data, and the CO ro-vibrational emission, refractory grains (we suggest carbon) are present inside the silicate sublimation radius (0.08 100 to account for the 870 micron continuum upper limit and the CO P(10) line flux; (5) the gas/dust ratio at 30

Carmona, A; Thi, W F; Benisty, M; Ménard, F; Grady, C; Kamp, I; Woitke, P; Olofsson, J; Roberge, A; Brittain, S; Dûchene, G; Meeus, G; Martin-Zaïdi, C; Dent, B; Bouquin, J B Le; Berger, J P

2014-01-01T23:59:59.000Z

217

Rare-earth elements in the atmosphere of the magnetic chemically peculiar star HD 144897. New classification of the Nd III spectrum  

E-Print Network [OSTI]

We have obtained a UVES spectrum of a slowly rotating strongly magnetic Ap star, HD 144897, that exhibits very large overabundances of rare-earth elements. Here we present a detailed spectral analysis of this object, also taking into account effects of non-uniform vertical distribution (stratification) of chemical elements. We have determined the photospheric abundances of 40 ions. For seven elements (Mg, Si, Ca, Ti, Cr, Mn, Fe), we have obtained a stratification model that allow us to produce a satisfactory fit to the observed profiles of spectral lines of various strength. REEs abundances, that for the first time in the literature have been determined from the lines of the first and second ions, have been found typically four dex larger than solar abundances. Our analysis of REE spectral lines provide a strong support to the laboratory line classification and determination of the atomic parameters. The only remarkable exception is Nd III, for which spectral synthesis was found to be inconsistent with the ob...

Ryabchikova, T A; Kochukhov, O; Ryabtsov, A V

2006-01-01T23:59:59.000Z

218

Precision spectroscopy of the $X\\,^{1}\\Sigma_{g}^{+}, v=0\\rightarrow 1$ ($J=0-2$) rovibrational splittings in H$_{2}$, HD and D$_{2}$  

E-Print Network [OSTI]

Accurate experimental values for the vibrational ground tone or fundamental vibrational energy splitting of H$_2$, HD, and D$_2$ are presented. Absolute accuracies of $2\\times10^{-4}$ cm$^{-1}$ are obtained from Doppler-free laser spectroscopy applied in a collisionless environment. The vibrational splitting frequencies are derived from the combination difference between separate electronic excitations from the $X^{1}\\Sigma_{g}^{+}, v=0, J$ and $v=1, J$ vibrational states to a common $EF^{1}\\Sigma^{+}_{g}, v=0, J$ state. The present work on rotational quantum states $J=1,2$ extends the results reported by Dickenson et al. on $J=0$ [Phys. Rev. Lett. 110 (2013) 193601]. The experimental procedures leading to this high accuracy are discussed in detail. A comparison is made with full \\emph{ab initio} calculations encompassing Born-Oppenheimer energies, adiabatic and non-adiabatic corrections, as well as relativistic corrections and QED-contributions. The present agreement between the experimental results and the ...

Niu, Ming Li; Dickenson, Gareth D; Eikema, Kjeld S E; Ubachs, Wim

2014-01-01T23:59:59.000Z

219

TRANSPORTATION: THE POTENTIAL  

E-Print Network [OSTI]

INTERMODAL TRANSPORTATION: THE POTENTIAL AND THE CHALLENGE A Summary Report 2003 #12;June 2003 To the Reader This report summarizes the second James L. Oberstar Forum on Transportation Policy and Technology. Over two days, we explored the chal- lenges and opportunities in intermodal transportation, addressing

Minnesota, University of

220

LABORATORY III POTENTIAL ENERGY  

E-Print Network [OSTI]

LABORATORY III POTENTIAL ENERGY Lab III - 1 In previous problems, you have been introduced to the concepts of kinetic energy, which is associated with the motion of an object, and internal energy, which is associated with the internal structure of a system. In this section, you work with another form of energy

Minnesota, University of

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


221

Ionisation Potential of Radon  

Science Journals Connector (OSTI)

... WE have determined the ionisation potential of radon, using the well-known method,1 due to Hertz, of compensation of the negative ... xenon and krypton: it was found to be 2.6 volts. The quantity of radon used in different experiments was of the order of 300 millicuries. The volume of ...

F. HOLWECK; L. WERTENSTEIN

1930-09-20T23:59:59.000Z

222

Hydrocarbon Potential of Deep Water  

Science Journals Connector (OSTI)

...research-article Hydrocarbon Potential of Deep Water H. R. Warman In...the geology and hydrocarbon potential of the Earth's deeper water areas, an attempt...United Kingdom 1981 Hydrocarbon potential of deep water Warman H. R. Author...

1978-01-01T23:59:59.000Z

223

WP 3 Report: Biomass Potentials Biomass production potentials  

E-Print Network [OSTI]

WP 3 Report: Biomass Potentials 1 Biomass production potentials in Central and Eastern Europe under different scenarios Final report of WP3 of the VIEWLS project, funded by DG-Tren #12;WP 3 Report: Biomass Potentials 2 Report Biomass production potentials in central and Eastern Europe under different scenarios

224

Effects of diesel injection pressure on the performance and emissions of a HD common-rail diesel engine fueled with diesel/methanol dual fuel  

Science Journals Connector (OSTI)

Abstract The diesel/methanol dual fuel (DMDF) combustion mode was conducted on a turbo-charged, inter-cooling diesel engine with 6-cylinder for the heavy duty (HD) vehicle. In DMDF mode, methanol is injected into the intake port to form lean air/methanol premixed mixture, and then ignited by the direct-injected diesel fuel in cylinder. This study is aimed to investigate the effect of diesel injection pressure on the characteristics of performance and exhaust emissions from the engine with common-rail fuel system. The experimental results show that at low injection pressure, the IMEP of DMDF mode is lower than that of pure diesel combustion (D) mode. COVIEMP of DMDF mode firstly decreases and then increases with increasing injection pressure, and it remains under 2.1% for all the tests. It is found that the combustion duration in DMDF mode becomes shorter, the maximum cylinder pressure and the peak heat release rate increase, and CA50 gets close to the top dead center as the injection pressure increases. BSFC of DMDF mode decreases with the increase of injection pressure, and is lower than that of D mode for injection pressure over 115 MPa. Both of NOX and smoke emissions are reduced in DMDF mode. But smoke decreases and NOX increases as the diesel injection pressure increases in DMDF mode. DMDF generates lower NO and CO2 emissions, while produces higher HC, CO, andNO2 emissions compared to D mode. As the diesel injection pressure increases, CO and HC emissions are decreased, however, CO2 and NO2 emissions are slightly increased.

Junheng Liu; Anren Yao; Chunde Yao

2015-01-01T23:59:59.000Z

225

Schwanniomyces: a potential superyeast  

SciTech Connect (OSTI)

In 1977, when our quest to determine the industrial potential of the genus Schwanniomyces began, little was known about this microbe. The genus was first described by Kloecker in 1909, after the isolation in the Antilles of Schwanniomyces occidentalis. A number of biological descriptions (see Ferreira and Phaff) and other species were also described. In addition, it was known that close to 100 yeasts were able to assimilate at least part of the starch molecule. Then, Augustin et al. and Costamagna et al. reported the ability of Schwanniomyces spp. to produce extracellular alpha-amylase and utilize starch. Later discoveries would indicate that both alpha-amylase and glucoamylase were present, and from then on, research with the yeast Schwanniomyces would become very competitive - especially in Canada and Europe. (Refs. 53).

Ingledew, W.M.

1987-01-01T23:59:59.000Z

226

Ground potential rise monitor  

DOE Patents [OSTI]

A device and method for detecting ground potential rise (GPR) comprising positioning a first electrode and a second electrode at a distance from each other into the earth. The voltage of the first electrode and second electrode is attenuated by an attenuation factor creating an attenuated voltage. The true RMS voltage of the attenuated voltage is determined creating an attenuated true RMS voltage. The attenuated true RMS voltage is then multiplied by the attenuation factor creating a calculated true RMS voltage. If the calculated true RMS voltage is greater than a first predetermined voltage threshold, a first alarm is enabled at a local location. If user input is received at a remote location acknowledging the first alarm, a first alarm acknowledgment signal is transmitted. The first alarm acknowledgment signal is then received at which time the first alarm is disabled.

Allen, Zachery W. (Mandan, ND); Zevenbergen, Gary A. (Arvada, CO)

2012-04-03T23:59:59.000Z

227

Technical Potential for Local Distributed  

E-Print Network [OSTI]

the impact of high penetrations of solar PV on wholesale power markets (energy and capacity Technical Potential for Local Distributed Photovoltaics in California Preliminary.391.5100 www.ethree.com Technical Potential for Local Distributed Photovoltaics in California Preliminary

228

Chapter 20: Electric Potential and Electric Potential Energy  

E-Print Network [OSTI]

1 Chapter 20: Electric Potential and Electric Potential Energy 2. A 4.5 µC charge moves in a uniform electric field ( )5 ^4.1 10 N/C= �E x . The change in electric potential energy of a charge that moves against an electric field is given by equation 20-1, 0U q Ed = . If the charge moves in the same

Kioussis, Nicholas

229

Light with nonzero chemical potential  

Science Journals Connector (OSTI)

Thermodynamic states and processes involving light are discussed in which the chemical potential of light is nonzero. Light with nonzero chemical potential is produced in photochemical reactions for example in a light emitting diode. The chemical potential of black-body radiation becomes negative upon a Joule expansion. The isothermal diffusion of light which is a common phenomenon is driven by the gradient in the chemical potential. These and other examples support the idea that light can be interpreted as a gas of photons with properties similar to a material gas.

F. Herrmann; P. Würfel

2005-01-01T23:59:59.000Z

230

Directed lines in sparse potentials  

Science Journals Connector (OSTI)

We present a continuum formulation of a (d+1)-dimensional directed line interacting with sparse potentials (i.e., d-dimensional potentials defined only at discrete longitudinal locations.) An iterative solution for the partition function is derived. The impulsive influence of the potentials induces discontinuities in the evolution of the probability density P(x,t) of the directed line. The effects of these discontinuities are studied in detail for the simple case of a single defect. We then investigate sparse columnar potentials defined as a periodic array of defects in (2+1) dimensions, and solve exactly for P. A nontrivial binding-unbinding transition is found.

T. J. Newman and A. J. McKane

1997-01-01T23:59:59.000Z

231

Quantification of the Potential Energy  

E-Print Network [OSTI]

(ICE). Energy from waste has an important role to play in improving energy security in the UK and1 waste up to 2020. To determine the potential2 contribution that energy recovery from residual shows that: potential energy recovery from these residual wastes could account for as much as 17

Columbia University

232

CP-odd nucleon potential  

Science Journals Connector (OSTI)

The P-odd and CP-odd nucleon potential for different models of CP violation in the one-meson exchange approximation is studied. It is shown that the main contribution is due to the ?-meson exhcange which leads to a simple one-parameter CP-odd nucleon potential.

V. P. Gudkov; Xiao-Gang He; Bruce H. J. McKellar

1993-05-01T23:59:59.000Z

233

Ambipolar potential formation in TMX  

SciTech Connect (OSTI)

TMX experimental data on ambipolar potential control and on the accompanying electrostatic confinement are reported. New results on the radial dependence of the central-cell confining potential are given. Radial and axial particle losses as well as scaling of the central-cell axial confinement are discussed.

Correl, D.L.; Allen, S.L.; Casper, T.A.

1981-05-05T23:59:59.000Z

234

18 - Biomethane for transport applications  

Science Journals Connector (OSTI)

Abstract: This chapter describes the fundamentals, potential and synergy of jointly using biomethane and natural gas in the transport sector. In the absence of an extensive national gas grid, biomethane distribution logistics of liquefied biogas (LBG) or compressed biogas (CBG) by road is capital intensive; however, biomethane represents an opportunity to make the natural gas vehicle (NGV) market green, forming a virtual gas grid. The promotional value of biomethane may offset some of the extra costs, particularly so when contemplating a future paradigm shift towards a fully sustainable society. The status and growth prospects of the Swedish and the world NGV market are described and discussed. Gas quality issues and relevant vehicle technology developments are also covered.

Mattias Svensson

2013-01-01T23:59:59.000Z

235

Self Potential | Open Energy Information  

Open Energy Info (EERE)

Self Potential Self Potential Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Self Potential Details Activities (20) Areas (20) Regions (4) NEPA(0) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Electrical Techniques Information Provided by Technique Lithology: SP technique originally applied to locating sulfide ore-bodies. Stratigraphic/Structural: Detection and tracing of faults. Hydrological: Determination of fluid flow patterns: electrochemical coupling processes due to variations in ionic concentrations, and electrokinetic coupling processes due to fluid flow in the subsurface. Thermal: Location of near-surface thermal anomalies: thermoelectric coupling processes due to variations in temperature in the subsurface.

236

Completeness for sparse potential scattering  

SciTech Connect (OSTI)

The present paper is devoted to the scattering theory of a class of continuum Schrödinger operators with deterministic sparse potentials. We first establish the limiting absorption principle for both modified free resolvents and modified perturbed resolvents. This actually is a weak form of the classical limiting absorption principle. We then prove the existence and completeness of local wave operators, which, in particular, imply the existence of wave operators. Under additional assumptions on the sparse potential, we prove the completeness of wave operators. In the context of continuum Schrödinger operators with sparse potentials, this paper gives the first proof of the completeness of wave operators.

Shen, Zhongwei, E-mail: zzs0004@auburn.edu [Department of Mathematics and Statistics, Auburn University, Auburn, Alabama 36849 (United States)] [Department of Mathematics and Statistics, Auburn University, Auburn, Alabama 36849 (United States)

2014-01-15T23:59:59.000Z

237

Assessment of global bioenergy potentials  

Science Journals Connector (OSTI)

A recently published literature review (Berndes et al. 2003) analysed 17 studies that reported bioenergy potentials, all published in the 1990s except...2001...) which became available in 2001. The analysed studi...

Ruth Offermann; Thilo Seidenberger…

2011-01-01T23:59:59.000Z

238

THE POTENTIAL OF SOLAR ELECTRIC  

E-Print Network [OSTI]

.5 Energy and the Costs of Production.............................................................5 2 and Local Energy Benefits of PV.......................................15 5. CONCLUSIONS AND DISCUSSIONTHE POTENTIAL OF SOLAR ELECTRIC APPLICATIONS FOR DELAWARE'S POULTRY FARMS FINAL REPORT

Delaware, University of

239

Energy eigenvalues for Yukawa potentials  

Science Journals Connector (OSTI)

A simple formula is given for the energy levels of a particle bound by a Yukawa potential which is accurate at the 1% level over the entire range of Z for a large range of n and l.

A. E. S. Green

1982-09-01T23:59:59.000Z

240

Molecular potentials and relaxation dynamics  

SciTech Connect (OSTI)

The use of empirical pseudopotentials, in evaluating interatomic potentials, provides an inexpensive and convenient method for obtaining highly accurate potential curves and permits the modeling of core-valence correlation, and the inclusion of relativistic effects when these are significant. Recent calculations of the X/sup 1/..sigma../sup +/ and a/sup 3/..sigma../sup +/ states of LiH, NaH, KH, RbH, and CsH and the X/sup 2/..sigma../sup +/ states of their anions are discussed. Pseudopotentials, including core polarization terms, have been used to replace the core electrons, and this has been coupled with the development of compact, higly-optimized basis sets for the corresponding one- and two-electron atoms. Comparisons of the neutral potential curves with experiment and other ab initio calculations show good agreement (within 1000 cm/sup -1/ over most of the potential curves) with the difference curves being considerably more accurate. In the method of computer molecular dynamics, the force acting on each particle is the resultant of all interactions with other atoms in the neighborhood and is obtained as the derivative of an effective many-body potential. Exploiting the pseudopotential approach, in obtaining the appropriate potentials may be very fruitful in the future. In the molecular dynamics example considered here, the conventional sum-of-pairwise-interatomic-potentials (SPP) approximation is used with the potentials derived either from experimental spectroscopic data or from Hartree-Fock calculations. The problem is the collisional de-excitation of vibrationally excited molecular hydrogen at an Fe surface. The calculations have been carried out for an initial vibrotational state v = 8, J = 1 and a translational temperature corresponding to a gas temperature of 500/sup 0/K. Different angles of approach and different initial random impact points on the surface have been selected. For any given collision with the wall, the molecule may pick up or lose vibrotatonal and translational energy.

Karo, A.M.

1981-05-18T23:59:59.000Z

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


241

Nuclear Potential and Symmetry Energy  

Science Journals Connector (OSTI)

A quadratic dependence on momentum is assumed for the two-nucleon interaction energy in the independent-particle model, and is used in a study of the nuclear binding energy and symmetry energy. The corresponding optical potentials for elastic nucleon scattering are discussed. The semiempirical interaction used is compared with the two-body potentials commonly used in shell-model calculations. These are found to be inadequate.

G. R. Satchler

1958-01-15T23:59:59.000Z

242

Parametric interatomic potential for graphene  

Science Journals Connector (OSTI)

A parametric interatomic potential is constructed for graphene. The potential energy consists of two parts: a bond energy function and a radial interaction energy function. The bond energy function is based on the Tersoff-Brenner potential model. It includes angular terms and explicitly accounts for flexural deformation of the lattice normal to the plane of graphene. It determines the cohesive energy of graphene and its equilibrium lattice constant. The radial energy function has been chosen such that it does not contribute to the binding energy or the equilibrium lattice constant but contributes to the interatomic force constants. The range of interaction of each atom extends up to its fourth-neighbor atoms in contrast to the Tersoff-Brenner potential, which extends only up to second neighbors. The parameters of the potential are obtained by fitting the calculated values to the cohesive energy, lattice constant, elastic constants, and phonon frequencies of graphene. The values of the force constants between an atom and other atoms that are within its fourth-neighbor distance are calculated. Analytical expressions are given for the elastic constants and the flexural rigidity of graphene. The flexural rigidity of the graphene lattice is found to be 2.13 eV, which is much higher than 0.797 eV calculated earlier using the Tersoff-Brenner potential.

V. K. Tewary and B. Yang

2009-02-27T23:59:59.000Z

243

Visualizing motion in potential wells  

Science Journals Connector (OSTI)

The concept of potential-energy diagrams is of fundamental importance in the study of quantum physics. Yet students are rarely exposed to this powerful alternative description in introductory classes and thus have difficulty comprehending its significance when they encounter it in beginning-level quantum courses. We describe a learning unit that incorporates a sequence of computer-interfaced experiments using dynamics or air-track systems. This unit is designed to make the learning of potential-energy diagrams less abstract. Students begin by constructing the harmonic or square-well potential diagrams using either the velocity data and assuming conservation of energy or the force-displacement graph for the elasticinteraction of an object constrained by springs or bouncing off springy blocks. Then they investigate the motion of a rider magnetinteracting with a configuration of field magnets and plot directly the potential-energy diagrams using a magnetic field sensor. The ease of measurement allows exploring the motion in a large variety of potential shapes in a short duration class.

Pratibha Jolly; Dean Zollman; N. Sanjay Rebello; Albena Dimitrova

1998-01-01T23:59:59.000Z

244

Biomass Energy Crops: Massachusetts' Potential  

E-Print Network [OSTI]

Biomass Energy Crops: Massachusetts' Potential Prepared for: Massachusetts Division of Energy;#12;Executive Summary In Massachusetts, biomass energy has typically meant wood chips derived from the region's extensive forest cover. Yet nationally, biomass energy from dedicated energy crops and from crop residues

Schweik, Charles M.

245

A knowledge of the potential  

E-Print Network [OSTI]

is as important for understanding protein folding as is the potential surface for the H H2 reaction. estimated to protein folding, in which thousands of atoms take part. The under- standing of a reaction is based of experimental developments and theoretical advances.[1] By contrast, protein folding is so complex that even

Sali, Andrej

246

Renewable Energy Technical Potential | Open Energy Information  

Open Energy Info (EERE)

Energy Technical Potential Energy Technical Potential Jump to: navigation, search Dictionary.png Renewable Energy Technical Potential: Renewable energy technical potential represents the achievable energy generation of a particular technology given system performance, topographic limitations, environmental, and land-use constraints. Other definitions:Wikipedia Reegle The primary benefit of assessing technical potential is that it establishes an upper-boundary estimate of development potential.[1] Multiple Types of Potential Defining RE Potential There are multiple types of potential, each with their own assumptions. In addition to technical potential, resource, economic, and market potentials are also considered when assessing the overall development potential of a given technology. (See 'Defining RE Potential' to the right).

247

Potential Uses of Depleted Uranium  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

POTENTIAL USES OF DEPLETED URANIUM POTENTIAL USES OF DEPLETED URANIUM Robert R. Price U.S. Department of Energy Germantown, Maryland 20874 M. Jonathan Haire and Allen G. Croff Chemical Technology Division Oak Ridge National Laboratory * Oak Ridge, Tennessee 37831-6180 June 2000 For American Nuclear Society 2000 International Winter and Embedded Topical Meetings Washington, D.C. November 12B16, 2000 The submitted manuscript has been authored by a contractor of the U.S. Government under contract DE-AC05-00OR22725. Accordingly, the U.S. Government retains a nonexclusive, royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for U.S. Government purposes. _________________________

248

Hagedorn divergences and tachyon potential  

E-Print Network [OSTI]

We consider the critical behavior for a string theory near the Hagedorn temperature. We use the factorization of the worldsheet to isolate the Hagedorn divergences at all genera. We show that the Hagedorn divergences can be resummed by introducing double scaling limits, which smooth the divergences. The double scaling limits also allow one to extract the effective potential for the thermal scalar. For a string theory in an asymptotic anti-de Sitter (AdS) spacetime, the AdS/CFT correspondence implies that the critical Hagedorn behavior and the relation with the effective potential should also arise from the boundary Yang-Mills theory. We show that this is indeed the case. In particular we find that the free energy of a Yang-Mills theory contains ``vortex'' contributions at finite temperature. Yang-Mills Feynman diagrams with vortices can be identified with contributions from boundaries of moduli space on the string theory side.

Mauro Brigante; Guido Festuccia; Hong Liu

2007-01-22T23:59:59.000Z

249

ASSESSMENT OF HOUSEHOLD CARBON FOOTPRINT REDUCTION POTENTIALS  

E-Print Network [OSTI]

Energy Efficiency Potential Study.  Technical Report Energy Efficiency  Potential Study.  Technical Report Energy Efficiency   Renewable Energy Technologies   Transportation   Assessment of Household Carbon Footprint Reduction Potentials is the final report 

Masanet, Eric

2010-01-01T23:59:59.000Z

250

Peak load management: Potential options  

SciTech Connect (OSTI)

This report reviews options that may be alternatives to transmission construction (ATT) applicable both generally and at specific locations in the service area of the Bonneville Power Administration (BPA). Some of these options have potential as specific alternatives to the Shelton-Fairmount 230-kV Reinforcement Project, which is the focus of this study. A listing of 31 peak load management (PLM) options is included. Estimated costs and normalized hourly load shapes, corresponding to the respective base load and controlled load cases, are considered for 15 of the above options. A summary page is presented for each of these options, grouped with respect to its applicability in the residential, commercial, industrial, and agricultural sectors. The report contains comments on PLM measures for which load shape management characteristics are not yet available. These comments address the potential relevance of the options and the possible difficulty that may be encountered in characterizing their value should be of interest in this investigation. The report also identifies options that could improve the efficiency of the three customer utility distribution systems supplied by the Shelton-Fairmount Reinforcement Project. Potential cogeneration options in the Olympic Peninsula are also discussed. These discussions focus on the options that appear to be most promising on the Olympic Peninsula. Finally, a short list of options is recommended for investigation in the next phase of this study. 9 refs., 24 tabs.

Englin, J.E.; De Steese, J.G.; Schultz, R.W.; Kellogg, M.A.

1989-10-01T23:59:59.000Z

251

Clot Busting Simulations Test Potential Stroke Treatment  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Clot Busting Simulations Test Potential Stroke Treatment Clot Busting Simulations Test Potential Stroke Treatment September 24, 2013 | Tags: Biological and Environmental Research...

252

Sandia National Laboratories: Assessing the Economic Potential...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

EnergyBiofuelsAssessing the Economic Potential of Advanced Biofuels Assessing the Economic Potential of Advanced Biofuels Fabrication of AMI Demonstration Blade Begun...

253

Solar energy potential in Pakistan  

Science Journals Connector (OSTI)

In view of the growing needs of energy in Pakistan the efficient use and development of renewable energy sources has become a major issue in the country. This has brought the intention of several national and multinational companies to design and implement a major work plan for energy conservation and construction of renewable energy sources like wind mills and solar panels. Fortunately Pakistan is among those countries in which sun warms the surface throughout the year and therefore has a strong potential for solar power generation. This study was conducted to explore those areas which are most suitable for solar energy potential using fifty eight meteorological stations covering the whole country. Angstrom equation and Hargreaves formula was used to calculate monthly solar energy potential by utilizing monthly climatical data of bright sunshine hours mean maximum and minimum temperatures. The lowest solar radiation intensity 76.49?W/m2 observed at Cherat during December and highest 339.25?W/m2 at Gilgit. The average monthly solar radiation intensity remains 136.05 to 287.36?W/m2 in the country. The results indicate that the values of solar radiation intensity greater than 200?W/m2 were observed in the months: February to October in Sindh March to October in almost all regions of Balochistan April to September in NWFP Northern Areas and Kashmir regions while March to October in Punjab. For 10?h a day average solar radiation intensity ranges from 1500?W/m2/day to 2750?W/m2/day in Pakistan especially in southern Punjab Sindh and Balochistan regions throughout the year. In an area of 100 m2 45?MW to 83?MW power per month may be generated in the above mentioned regions.

Shahzada Adnan; Azmat Hayat Khan; Sajjad Haider; Rashed Mahmood

2012-01-01T23:59:59.000Z

254

Hertz Potentials and Differential Geometry  

E-Print Network [OSTI]

+ ~r (~r ~ m): (2.19) These eld relations automatically satisfy equations (2.3) and (2.4). Applying 8 the other two Maxwell equations yield = ~r ~r(~r ~ e) ~r @2~ e @t2 = r2(~r ~ e) @2~r ~ e @t2 = ~r (r2~ e @2~ e @t2 ) = ~r ( ~ e... such that ~ m = @ ~W @t ~rw: (2.27) As we note here an apparent asymmetry between the two Hertz potentials, let us back up and remember how ~ e and ~ m came to be. We speci ed a particular gauge for ~A and by equation (2.12), but suppose we relax...

Bouas, Jeffrey David

2011-08-08T23:59:59.000Z

255

Fusion-A Potential Power Source  

Science Journals Connector (OSTI)

Fusion-A Potential Power Source ... Nuclear energy, fusion reactions, magnetic confinement, and tokamaks. ...

Torkil H. Jensen

1994-01-01T23:59:59.000Z

256

Semiconductor Nanoclusters as Potential Photocatalysts  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

High Power Electronics Based on the 2-Dimensional Electron Gas in GaN High Power Electronics Based on the 2-Dimensional Electron Gas in GaN Heterostructures by S. R. Kurtz, A. A. Allerman, and D. Koleski Motivation-GaN-based electronics offer miniaturization potential of radical proportions for microwave power amplifiers. GaN's large bandgap, high breakdown field, high electron velocity, and excellent thermal properties have led to high electron mobility transistors (HEMT) with up to 10x the power density of GaAs and other traditional semiconductors at frequencies up to 20 GHz. Further contributing to the outstanding performance of GaN-based amplifiers is the highly conducting, 2-dimensional electron gas (2DEG) used for the HEMT channel. Intrinsic polarization and piezoelectric properties of GaN materials can produce a 2DEG at an

257

Semiconductor Nanoclusters as Potential Photocatalysts  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

0001 0001 Transport and Kinetic Processes in GaN Epitaxial Lateral Overgrowth M. E. Coltrin and C. C. Mitchell Motivation-GaN is a wide band gap semi- conductor with a broad range of potential appli- cations, e.g., high-temperature electronics, op- telectronics, chemical or biological sensors. GaN thin films usually have a high defect den- sity, leading to poor performance. Epitaxial Lat- eral Overgrowth (ELO) has been shown to greatly reduce defect densities, often by factors of 100 or more. We are conducting fundamental studies of GaN growth kinetics during ELO. Accomplishment-In ELO, a mask pattern of dielectric material is deposited on top of a GaN buffer layer. Further growth of GaN occurs se- lectively on exposed areas of the underlying buffer layer, and not on the dielectric material.

258

A black potential for spin less particles  

E-Print Network [OSTI]

We consider the most general non-Hermitian Hulthen potential to study the scattering of spin-less relativistic particles. The conditions for CC, SS and CPA are obtained analytically for this potential. We show that almost total absorption occurs for entire range of incidence energy for certain parameter ranges of the potential and hence term this as `black potential'. Time reversed of the same potential shows perfect emission for the entire range of particle energy. We also present the classical analog of this potential in terms of waveguide cross section.

Ananya Ghatak; Mohammad Hasan; Bhabani Prasad Mandal

2014-12-02T23:59:59.000Z

259

The potential of renewable energy  

SciTech Connect (OSTI)

On June 27 and 28, 1989, the US Department of Energy (DOE) national laboratories were convened to discuss plans for the development of a National Energy Strategy (NES) and, in particular, the analytic needs in support of NES that could be addressed by the laboratories. As a result of that meeting, interlaboratory teams were formed to produce analytic white papers on key topics, and a lead laboratory was designated for each core laboratory team. The broad-ranging renewables assignment is summarized by the following issue statement from the Office of Policy, Planning and Analysis: to what extent can renewable energy technologies contribute to diversifying sources of energy supply What are the major barriers to greater renewable energy use and what is the potential timing of widespread commercialization for various categories of applications This report presents the results of the intensive activity initiated by the June 1989 meeting to produce a white paper on renewable energy. Scores of scientists, analysts, and engineers in the five core laboratories gave generously of their time over the past eight months to produce this document. Their generous, constructive efforts are hereby gratefully acknowledged. 126 refs., 44 figs., 32 tabs.

Not Available

1990-03-01T23:59:59.000Z

260

Natural gas as a fuel for road vehicles  

Science Journals Connector (OSTI)

The operation of light duty and heavy duty vehicles on natural gas for vehicles (NGV) is discussed in terms of the fuel combustion differences compared with conventional fuels, and engine design changes needed to match the fuel characteristics of NGV. Engine management system requirements are discussed, emissions performance of NGV-fuelled engines is described and fuel storage and supply issues are considered.

E.E. Milkins; J.D. Edsell

1996-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hd ngv potential" 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

Potential Vorticity Anomalies Associated with Squall Lines  

Science Journals Connector (OSTI)

This study involves observations and model simulations of potential vorticity anomalies in the wake of midlatitude squall lines. Using data from the Oklahoma–Kansas PRE-STORM experiment, we analyze potential vorticity fields near two squall lines—...

Rolf F. A. Hertenstein; Wayne H. Schubert

1991-07-01T23:59:59.000Z

262

United States Wind Resource Potential Chart  

Wind Powering America (EERE)

18,000 Rated Capacity Above Indicated CF (GW) United States - Wind Resource Potential Cumulative Rated Capacity vs. Gross Capacity Factor (CF) 80 m The estimates show the potential...

263

Conditionally exactly soluble potentials and supersymmetry  

Science Journals Connector (OSTI)

It is shown that the condition required for one of the potentials considered by Dutra [Phys. Rev. A 47, R2435 (1993)] to be a conditionally exactly soluble potential is the same as that the potential can be put in an explicitly supersymmetric form.

Nivedita Nag; R. Roychoudhury; Y. P. Varshni

1994-06-01T23:59:59.000Z

264

Potential Energy Surfaces Donald G. Truhlar  

E-Print Network [OSTI]

. Meyers (Academic Press, New York, 2001), Vol. 13, pages 9-17. httpPotential Energy Surfaces Donald G. Truhlar University of Minnesota I. Introduction II. Quantum Mechanical Basis for Adiabatic Potential Energy Surfaces III. Topology of Adiabatic Potential Energy Surfaces

Truhlar, Donald G

265

Global potential for wind-generated electricity  

Science Journals Connector (OSTI)

...Annual wind energy potential...Monthly wind energy potential for...on a U.S. national basis depending...electricity to other energy forms. Plug-in...transmission grid. Expansion...in potential renewable resources, not...relating to the integration of electricity...relates to the challenge of matching...

Xi Lu; Michael B. McElroy; Juha Kiviluoma

2009-01-01T23:59:59.000Z

266

Potential Health Hazards of Radiation | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Potential Health Hazards of Radiation Potential Health Hazards of Radiation Potential Health Hazards of Radiation Potential Health Hazards of Radiation More Documents &...

267

Experimental and theoretical investigations of the reactions NH(X {sup 3}{sigma}{sup -})+D({sup 2}S){yields}ND(X {sup 3}{sigma}{sup -})+H({sup 2}S) and NH(X {sup 3}{sigma}{sup -})+D({sup 2}S){yields}N({sup 4}S)+HD(X {sup 1}{sigma}{sub g}{sup +})  

SciTech Connect (OSTI)

The rate coefficient of the reaction NH(X {sup 3}{sigma}{sup -})+D({sup 2}S){yields}{sup k{sub 1}}products (1) is determined in a quasistatic laser-flash photolysis, laser-induced fluorescence system at low pressures. The NH(X) radicals are produced by quenching of NH(a {sup 1}{delta}) (obtained in the photolysis of HN{sub 3}) with Xe and the D atoms are generated in a D{sub 2}/He microwave discharge. The NH(X) concentration profile is measured in the presence of a large excess of D atoms. The room-temperature rate coefficient is determined to be k{sub 1}=(3.9{+-}1.5)x10{sup 13} cm{sup 3} mol{sup -1} s{sup -1}. The rate coefficient k{sub 1} is the sum of the two rate coefficients, k{sub 1a} and k{sub 1b}, which correspond to the reactions NH(X {sup 3}{sigma}{sup -})+D({sup 2}S){yields}{sup k{sub 1a}}ND(X {sup 3}{sigma}{sup -})+H({sup 2}S) (1a) and NH(X {sup 3}{sigma}{sup -})+D({sup 2}S){yields}{sup k{sub 1b}}N({sup 4}S)+HD(X {sup 1}{sigma}{sub g}{sup +}) (1b), respectively. The first reaction proceeds via the {sup 2}A{sup ''} ground state of NH{sub 2} whereas the second one proceeds in the {sup 4}A{sup ''} state. A global potential energy surface is constructed for the {sup 2}A{sup ''} state using the internally contracted multireference configuration interaction method and the augmented correlation consistent polarized valence quadrupte zeta atomic basis. This potential energy surface is used in classical trajectory calculations to determine k{sub 1a}. Similar trajectory calculations are performed for reaction (1b) employing a previously calculated potential for the {sup 4}A{sup ''} state. The calculated room-temperature rate coefficient is k{sub 1}=4.1x10{sup 13} cm{sup 3} mol{sup -1} s{sup -1} with k{sub 1a}=4.0x10{sup 13} cm{sup 3} mol{sup -1} s{sup -1} and k{sub 1b}=9.1x10{sup 11} cm{sup 3} mol{sup -1} s{sup -1}. The theoretically determined k{sub 1} shows a very weak positive temperature dependence in the range 250{<=}T/K{<=}1000. Despite the deep potential well, the exchange reaction on the {sup 2}A{sup ''} ground-state potential energy surface is not statistical.

Qu, Z.-W.; Zhu, H.; Schinke, R.; Adam, L.; Hack, W. [Max-Planck-Institut fuer Dynamik und Selbstorganisation, D-37073 Goettingen (Germany); Max-Planck-Institut fuer biophysikalische Chemie, D-37077 Goettingen (Germany)

2005-05-22T23:59:59.000Z

268

Potential Energy Total electric potential energy, U, of a system of  

E-Print Network [OSTI]

Potential Energy Total electric potential energy, U, of a system of charges is obtained from of work done by the field, W*= -W. Bring q1 from , W *= 0 since no electric F yet #12;Potential Energy Total electric potential energy, U, of a system of charges is obtained from the work done by an external

Bertulani, Carlos A. - Department of Physics and Astronomy, Texas A&M University

269

Stakeholder Engagement and Outreach: Wind Resource Potential  

Wind Powering America (EERE)

Wind Resource Potential Offshore Maps Community-Scale Maps Residential-Scale Maps Anemometer Loan Programs & Data Wind Resource Potential State Wind Resource Potential Tables Find state wind resource potential tables in three versions: Microsoft Excel 2007, 2003, and Adobe Acrobat PDF. 30% Capacity Factor at 80-Meters Microsoft 2007 Microsoft 2003 Adobe Acrobat PDF Additional 80- and 100-Meter Wind Resource Potential Tables Microsoft 2007 Microsoft 2003 Adobe Acrobat PDF The National Renewable Energy Laboratory (NREL) estimated the windy land area and wind energy potential for each state using AWS Truepower's gross capacity factor data. This provides the most up to date estimate of how wind energy can support state and national energy needs. The table lists the estimates of windy land area with a gross capacity of

270

Bohm's Quantum Potential as an Internal Energy  

E-Print Network [OSTI]

We pursue our discussion of Fermi's surface initiated in Dennis, de Gosson and Hiley and show that Bohm's quantum potential can be viewed as an internal energy of a quantum system. This gives further insight into the role it played by the quantum potential in stationary states. It also allows us to provide a physically motivated derivation of Schr\\"odinger's equation for a particle in an external potential.

Glen Dennis; Maurice de Gosson; Basil Hiley

2014-12-15T23:59:59.000Z

271

Treecodes for Potential and Force Approximations  

E-Print Network [OSTI]

and patience during the PhD. period. She made every effort for me to concentrate on my work. I am indebted to my mother for sharing my vision. She had been a great source of inspiration for my study all these years. Also, I would like to thank my sisters and in... . . . . . . . . . . . . . . . . . . 14 II A TREECODE FOR POTENTIALS OF THE FORM r??* . . . 15 A. Multipole Expansion Theorem for r?1 Potential . . . . . . 16 B. Ultraspherical Polynomials . . . . . . . . . . . . . . . . . . 18 C. A Treecode for r?? Potentials...

Kannan, Kasthuri Srinivasan

2009-05-15T23:59:59.000Z

272

The Snell law for quaternionic potentials  

SciTech Connect (OSTI)

By using the analogy between optics and quantum mechanics, we obtain the Snell law for the planar motion of quantum particles in the presence of quaternionic potentials.

De Leo, Stefano, E-mail: deleo@ime.unicamp.br [Department of Applied Mathematics, State University of Campinas, São Paulo (Brazil); Ducati, Gisele C., E-mail: ducati@ufabc.edu.br [CMCC, Universidade Federal do ABC, São Paulo (Brazil)

2013-12-15T23:59:59.000Z

273

Available potential energy of an isolated feature  

SciTech Connect (OSTI)

The true available potential energy (APE) of an isolated feature (e.g. a warm-core ring) in a basin is the difference in the potential plus internal energy between the observed and reference state. The reference state is that in which the same fluid is redistributed adiabatically to a stably stratified state and the isopycnals are on constant geopotential surfaces. For an isolated feature in an infinitely wide basin, it would seem reasonable to assume that the far-field density structure is a good approximation of the reference state. This approximation to the reference state will be examined in this paper. Four different methods of calculating the available potential of an isolated feature are compared. These are (1) the gravitational available potential energy using the reference state (APE/sub G/), (2) the gravitational available potential energy using the far-field density structure as an approximation for the reference state, (3) the Boussinesq available potential energy using the reference state (APE/sub B/), and (4) the Boussinesq available potential energy using the far-field density structure instead of the reference state. The gravitational available potential energy using the the reference state (APE/sub G/) is the true available potential energy for an incompressible fluid.

Hebert, D.

1988-01-15T23:59:59.000Z

274

Aftertreatment Modeling Status, Futur Potential, and Application...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

NAFTA Truck Business Unit 2004deerzhang.pdf More Documents & Publications SCR Potential and Issues for Heavy-Duty Applications in the United States Future Diesel...

275

Current Status and Potential Future Developments for  

E-Print Network [OSTI]

in response to public concern about tropical deforestation and demand for an international woodCurrent Status and Potential Future Developments for Forest Certification Richard P. Vlosky

276

Feasibility of streaming potential measurements during hydrofracturing  

SciTech Connect (OSTI)

A simple model study shows that the onset of hydraulic fracturing and eventually fracture directions may be detected in streaming potential measurements. To model streaming potential responses of hydraulic fracturing, a theory of slowly time-varying electrokinetic phenomena and a self-consistent model to describe rock conductivities in terms of intrinsic rock properties are developed. Measureable streaming potential responses are generated during the hydraulic fracturing process. The fracturing process amplifies the observable streaming potential response by up to one order of magnitude when compared to a similar experiment without fracturing. The resolution of fractures is better in monitoring wells than on the surface.

Wurmstich, B.; Buettgenbach, T.; Morgan, F.D.

1995-12-31T23:59:59.000Z

277

Self-potential observations during hydraulic fracturing  

E-Print Network [OSTI]

potential measurements during hydraulic fracturing of BunterMonitoring during hydraulic fracturing using the TG-2 well,fracture processes in hydraulic fracturing, Quarterly Report

Moore, J R; Glaser, Steven D

2007-01-01T23:59:59.000Z

278

Potential of geothermal energy in China .  

E-Print Network [OSTI]

??This thesis provides an overview of geothermal power generation and the potential for geothermal energy utilization in China. Geothermal energy is thermal energy stored in… (more)

Sung, Peter On

2010-01-01T23:59:59.000Z

279

Self-potential observations during hydraulic fracturing  

E-Print Network [OSTI]

potential measurements during hydraulic fracturing of BunterMonitoring during hydraulic fracturing using the TG-2 well,fracture processes in hydraulic fracturing, Quarterly Report

Moore, Jeffrey R.; Glaser, Steven D.

2008-01-01T23:59:59.000Z

280

Self-potential observations during hydraulic fracturing  

E-Print Network [OSTI]

potential measurements during hydraulic fracturing of BunterSP response during hydraulic fracturing. Citation: Moore, J.observations during hydraulic fracturing, J. Geophys. Res. ,

Moore, J R; Glaser, Steven D

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hd ngv potential" 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

Title Preliminary Assessment of Geothermal Potential Author  

National Nuclear Security Administration (NNSA)

NTSEIS ADMINISTRATIVE RECORD PRELIMINARY ASSESSMENT OF GEOTHERMAL POTENTIAL NEVADA TEST SITE j NYE COUNTY, NEVADA Prepared for: UNITED STATES DEPARTMENT OF ENERGY Prepared by:...

282

Energy dependence of nucleon-nucleon potentials  

E-Print Network [OSTI]

We investigate the energy dependence of potentials defined through the Bethe-Salpeter wave functions. We analytically evaluate such a potential in the Ising field theory in 2 dimensions and show that its energy dependence is weak at low energy. We then numerically calculate the nucleon-nucleon potential at non-zero energy using quenched QCD with anti-periodic boundary condition. In this case we also observe that the potentials are almost identical at $E\\simeq 0$ and $E\\simeq 50$ MeV, where $E$ is the center of mass kinetic energy.

Sinya Aoki; Janos Balog; Tetsuo Hatsuda; Noriyoshi Ishii; Keiko Murano; Hidekatsu Nemura; Peter Weisz

2008-12-03T23:59:59.000Z

283

Hydrogen Infrastructure Market Readiness: Opportunities and Potential...  

Broader source: Energy.gov (indexed) [DOE]

Opportunities and Potential for Near-term Cost Reductions. Proceedings of the Hydrogen Infrastructure Market Readiness Workshop and Summary of Feedback Provided through the...

284

Alternative Ways of Financing Infrastructure Investment: Potential...  

Open Energy Info (EERE)

'Novel' Financing Models Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Alternative Ways of Financing Infrastructure Investment: Potential for 'Novel' Financing Models...

285

Geothermal: Sponsored by OSTI -- Identifying Potential Geothermal...  

Office of Scientific and Technical Information (OSTI)

Identifying Potential Geothermal Resources from Co-Produced Fluids Using Existing Data from Drilling Logs: Williston Basin, North Dakota Geothermal Technologies Legacy Collection...

286

Physics 321 Energy Conservation Potential Energy in  

E-Print Network [OSTI]

Physics 321 Hour 7 Energy Conservation ­ Potential Energy in One Dimension Work-Energy Theorem = 1 work increases kinetic energy, negative work decreases kinetic energy Gravity Depending on initial is independent of path. If we know we also know . 1 2 y x Potential Energy If T is dependent only on the end

Hart, Gus

287

POTENTIAL IMPACTS OF CLIMATE CHANGE ON  

E-Print Network [OSTI]

POTENTIAL IMPACTS OF CLIMATE CHANGE ON FLOODING IN WISCONSIN Ken Potter and Zach Schuster flood scenarios in Wisconsin · Potential impact of climate change on Wisconsin flooding · Ongoing #12;WISCONSIN INITIATIVE ON CLIMATE CHANGE IMPACTS · Partnership between the University of Wisconsin

Sheridan, Jennifer

288

Measuring Transport Protocol Potential for Energy Efficiency  

E-Print Network [OSTI]

Measuring Transport Protocol Potential for Energy Efficiency S. Kontogiannis, L. Mamatas, I. Psaras, Greece {skontog, emamatas, ipsaras, vtsaousi}@ee.duth.gr Abstract. We investigate the energy-saving potential of transport pro- tocols. We focus on the system-related aspect of energy. Do we have to damage

Tsaoussidis, Vassilis

289

Wave equations with energy dependent potentials  

E-Print Network [OSTI]

We study wave equations with energy dependent potentials. Simple analytical models are found useful to illustrate difficulties encountered with the calculation and interpretation of observables. A formal analysis shows under which conditions such equations can be handled as evolution equation of quantum theory with an energy dependent potential. Once these conditions are met, such theory can be transformed into ordinary quantum theory.

J. Formanek; R. J. Lombard; J. Mares

2003-09-22T23:59:59.000Z

290

Energy from Forest Biomass: Potential Economic Impacts  

E-Print Network [OSTI]

Energy from Forest Biomass: Potential Economic Impacts in Massachusetts Prepared for: Massachusetts Bioenergy Initiative, a multifaceted study of biomass energy potential in Massachusetts. The economic impact study looks specifically at impacts in the 5 western counties of the Commonwealth, where biomass energy

Schweik, Charles M.

291

Visualizing Motion in Potential Wells* Pratibha Jolly  

E-Print Network [OSTI]

, directly and plot the potential energy diagrams using a magnetic field sensor. The ease of measurement State University, Manhattan, Kansas 66506 Abstract: The concept of potential energy diagrams they encounter it in beginning level quantum courses. We describe a learning unit that incorporates a sequence

Zollman, Dean

292

Scalar potentials out of canonical quantum cosmology  

E-Print Network [OSTI]

Using canonical quantization of a flat FRW cosmological model containing a real scalar field $\\phi$ endowed with a scalar potential $V(\\phi)$, we are able to obtain exact and semiclassical solutions of the so called Wheeler-DeWitt equation for a particular family of scalar potentials. Some features of the solutions and their classical limit are discussed.

W. Guzman; M. Sabido; J. Socorro; L. Arturo Urena-Lopez

2005-06-06T23:59:59.000Z

293

Dynamical Higgs potentials with a landscape  

E-Print Network [OSTI]

We consider one-loop effective potentials for adjoint Higgs fields that originate from flat holonomies in toroidal compactification of gauge theories. We show that such potentials are "landscape-like" for large gauge groups and generic non-supersymmetric matter representations. In particular, there is a large number of vacua with similar local properties, scanning a broad band of vacuum energies.

J. L. F. Barbon; C. Hoyos

2006-02-28T23:59:59.000Z

294

PHASE RECOVERY WITH NONDECAYING POTENTIALS Tuncay Aktosun  

E-Print Network [OSTI]

Ë?odinger equation, Nondecaying potentials, Steplike potentials, Neutron reflectometry Short title: Phase recovery of recent papers on X­ray and neutron reflectometry [4,5], which is thus the main motivation for our work. These are mainly reasonable assumptions for some reflectometry applications, but 2 #12; nevertheless

295

Fuel Efficiency of New European HD Vehicles  

Broader source: Energy.gov [DOE]

Presentation given at the 2007 Diesel Engine-Efficiency & Emissions Research Conference (DEER 2007). 13-16 August, 2007, Detroit, Michigan. Sponsored by the U.S. Department of Energy's (DOE) Office of FreedomCAR and Vehicle Technologies (OFCVT).

296

MD/HD Advanced Technology Evaluations  

Broader source: Energy.gov [DOE]

Presentation from the U.S. DOE Office of Vehicle Technologies "Mega" Merit Review 2008 on February 25, 2008 in Bethesda, Maryland.

297

Property:PotentialCSPGeneration | Open Energy Information  

Open Energy Info (EERE)

PotentialCSPGeneration PotentialCSPGeneration Jump to: navigation, search Property Name PotentialCSPGeneration Property Type Quantity Description The estimated potential energy generation from CSP for a particular place. Use this type to express a quantity of energy. The default unit for energy on OpenEI is the Kilowatt hour (kWh), which is 3,600,000 Joules. http://en.wikipedia.org/wiki/Unit_of_energy It's possible types are Watt hours - 1000 Wh, Watt hour, Watthour Kilowatt hours - 1 kWh, Kilowatt hour, Kilowatthour Megawatt hours - 0.001 MWh, Megawatt hour, Megawatthour Gigawatt hours - 0.000001 GWh, Gigawatt hour, Gigawatthour Joules - 3600000 J, Joules, joules Pages using the property "PotentialCSPGeneration" Showing 25 pages using this property. (previous 25) (next 25)

298

Property:PotentialCSPCapacity | Open Energy Information  

Open Energy Info (EERE)

PotentialCSPCapacity PotentialCSPCapacity Jump to: navigation, search Property Name PotentialCSPCapacity Property Type Quantity Description The nameplate capacity technical potential from CSP for a particular place. Use this property to express potential electric energy generation, such as Nameplate Capacity. The default unit is megawatts (MW). For spatial capacity, use property Volume. Acceptable units (and their conversions) are: 1 MW,MWe,megawatt,Megawatt,MegaWatt,MEGAWATT,megawatts,Megawatt,MegaWatts,MEGAWATT,MEGAWATTS 1000 kW,kWe,KW,kilowatt,KiloWatt,KILOWATT,kilowatts,KiloWatts,KILOWATT,KILOWATTS 1000000 W,We,watt,watts,Watt,Watts,WATT,WATTS 1000000000 mW,milliwatt,milliwatts,MILLIWATT,MILLIWATTS 0.001 GW,gigawatt,gigawatts,Gigawatt,Gigawatts,GigaWatt,GigaWatts,GIGAWATT,GIGAWATTS

299

Executive Potential Program (EPP) | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Executive Potential Program (EPP) Executive Potential Program (EPP) Executive Potential Program (EPP) January 10, 2014 (All day) Application Procedure: Nomination packages for EPP-2015-1 and EPP 2015-DC, must be received by deadline dates of January 10, 2014 and April 8, 2014 respectively, and must include the following: -The completed Executive Potential Program Application that includes information about the applicant, the applicant's immediate supervisor, and the DOE program coordinator, Johnny McChriston. - A statement from the applicant indicating the purpose for applying and how participation in the Executive Potential Program will support the applicant's career goals. -The applicant's current resume, signed and dated by the applicant - Payment must accompany the application before it will be processed.

300

Neutrino matter potentials induced by Earth  

E-Print Network [OSTI]

An instructive method of deriving the matter potentials felt by neutrinos propagating through matter on Earth is presented. This paper thoroughly guides the reader through the calculations involving the effective weak Hamiltonian for lepton and quark scattering. The matter potentials are well-known results since the late 70's, but a detailed and pedagogical calculation of these quantities is hard to find. We derive potentials due to charged and neutral current scattering on electrons, neutrons and protons. Intended readership is for undergraduates/graduates in the fields of relativistic quantum mechanics and quantum field theory. In addition to the derivation of the potentials for neutrinos, we explicitely study the origin of the reversed sign for potentials in the case of antineutrino-scattering.

J. Linder

2006-01-15T23:59:59.000Z

Note: This page contains sample records for the topic "hd ngv potential" 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

Simple Exercises to Flatten your Potential  

SciTech Connect (OSTI)

We show how backreaction of the inflaton potential energy on heavy scalar fields can flatten the inflationary potential, as the heavy fields adjust to their most energetically favorable configuration. This mechanism operates in previous UV-complete examples of axion monodromy inflation - flattening a would-be quadratic potential to one linear in the inflaton field - but occurs more generally, and we illustrate the effect with several examples. Special choices of compactification minimizing backreaction may realize chaotic inflation with a quadratic potential, but we argue that a flatter potential such as power-law inflation V({phi}) {proportional_to} {phi}{sup p} with p < 2 is a more generic option at sufficiently large values of {phi}.

Dong, Xi; Horn, Bart; Silverstein, Eva; /SLAC /Santa Barbara, KITP; Westphal, Alexander; /DESY /SLAC

2011-08-12T23:59:59.000Z

302

Concentrating Solar Power Facilities and Solar Potential | Department...  

Office of Environmental Management (EM)

Facilities and Solar Potential Concentrating Solar Power Facilities and Solar Potential Concentrating Solar Power Facilities and CSP Energy Potential Gradient Click icons to filter...

303

Alaska Harbors Geothermal Energy Potential | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Alaska Harbors Geothermal Energy Potential Alaska Harbors Geothermal Energy Potential January 10, 2014 - 12:00am Addthis Alaska Harbors Geothermal Energy Potential Leveraging...

304

Spontaneous Potential Well Log | Open Energy Information  

Open Energy Info (EERE)

Spontaneous Potential Well Log Spontaneous Potential Well Log Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Spontaneous Potential Well Log Details Activities (2) Areas (2) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Well Log Techniques Information Provided by Technique Lithology: SP technique originally applied to locating sulfide ore-bodies. Stratigraphic/Structural: -Formation bed thickness and boundaries -Detection and tracing of faults -Permeability and porosity Hydrological: Determination of fluid flow patterns: electrochemical coupling processes due to variations in ionic concentrations, and electrokinetic coupling processes due to fluid flow in the subsurface.

305

Category:Tech Potential Properties | Open Energy Information  

Open Energy Info (EERE)

Properties Properties Jump to: navigation, search This is the Tech Potential Properties category. Pages in category "Tech Potential Properties" The following 30 pages are in this category, out of 30 total. P Property:PotentialBiopowerGaseousCapacity Property:PotentialBiopowerGaseousGeneration Property:PotentialBiopowerGaseousMass Property:PotentialBiopowerSolidCapacity Property:PotentialBiopowerSolidGeneration Property:PotentialBiopowerSolidMass Property:PotentialCSPArea Property:PotentialCSPCapacity Property:PotentialCSPGeneration Property:PotentialEGSGeothermalCapacity P cont. Property:PotentialEGSGeothermalGeneration Property:PotentialGeothermalHydrothermalCapacity Property:PotentialGeothermalHydrothermalGeneration Property:PotentialHydropowerCapacity Property:PotentialHydropowerGeneration

306

Solar Power Potential in SE New Mexico  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Solar Power Potential in Southeast New Mexico Solar Power Potential in Southeast New Mexico Solar Power Project Opportunities Abound in the Region The WIPP site is receives abundant solar energy with 6-7 kWh/sq meter power production potential As the accompanying map of New Mexico shows, the WIPP site enjoys abundant year-round sunshine. With an average solar power production potential of 6-7 kWh/sq meter per day, one exciting project being studied for location at WIPP is a 30-50 MW Solar Power Tower: The American Solar Energy Society (ASES) is is a national trade association promoting solar energy as a clean source of electricity, and provides a comprehensive resource for additional information. DOE's Office of Energy Efficiency and Renewable Energy is also a comprehensive resource for more information on renewable energy.

307

United States Wind Resource Potential Chart  

Wind Powering America (EERE)

18,000 18,000 Rated Capacity Above Indicated CF (GW) United States - Wind Resource Potential Cumulative Rated Capacity vs. Gross Capacity Factor (CF) 80 m The estimates show the potential gigawatts of rated capacity that could be installed on land above a given gross capacity factor (without losses) at 80-m and 100-m heights above ground. Areas greater than 30% at 80 m are generally considered to have suitable wind resource for potential wind development with today's advanced wind turbine technology. AWS Truewind, LLC developed the wind resource data for windNavigator® (http://navigator.awstruewind.com) with a spatial resolution of 200 m. NREL filtered the wind potential estimates to

308

Unearthing Geothermal's Potential | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Unearthing Geothermal's Potential Unearthing Geothermal's Potential Unearthing Geothermal's Potential September 16, 2010 - 12:33pm Addthis Niketa Kumar Niketa Kumar Public Affairs Specialist, Office of Public Affairs Our latest geothermal technologies awards are for those who think outside of the box (and below the surface). Secretary of Energy Steven Chu announced $20 million towards the research and development of non-conventional geothermal energy technologies in three areas: low temperatures fluids, geothermal fluids recovered from oil and gas wells and highly pressurized geothermal fluids. As the Secretary said, these innovative projects have the potential to expand the use of geothermal energy to more areas around the country. Low temperature resources are widely available across the country and offer

309

Executive Potential Program | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Potential Program Potential Program Executive Potential Program Program Overview: This is a one year training program designed to help senior leaders understand and meet the challenges facing today's federal workforce. Through personal and professional development, The Executive Potential Program builds leadership capacity through strengthening the competencies needed to help today's leaders create a work environment prepared to meet changing agency initiatives. Nomination Due Date: Nomination Due Date: The nomination package must be received by the nomination deadline, which are as follows. (For EEP 2015-1 January 10, 2014 or until filled). (For EPP 2015-DC, April 8, 2014 or until filled) Please be advised that for the 2015-DC session only, there is a limit of 30 participants on a first come basis. Applicants are advised

310

The Promising Potential of Renewable Energy  

Science Journals Connector (OSTI)

The Promising Potential of Renewable Energy ... Renewable sources will become more important in producing energy, but policy changes must be put into place first ... Many new projects and industries involving renewable sources of energy were getting under way. ...

ROBERT P. MORGAN

1983-11-28T23:59:59.000Z

311

Gate potential control of nanofluidic devices  

E-Print Network [OSTI]

The effect of an external gate potential control on the nanofluidic nanochannels was experimentally investigated in this work. Like in the field effect transistors (FET) in microelectronics, molecular transport in ...

Le Coguic, Arnaud

2005-01-01T23:59:59.000Z

312

Energy saving potential of various roof technologies  

E-Print Network [OSTI]

Unconventional roof technologies such as cool roofs and green roofs have been shown to reduce building heating and cooling load. Although previous studies suggest potential for energy savings through such technologies, ...

Ray, Stephen D. (Stephen Douglas)

2010-01-01T23:59:59.000Z

313

Multivessel Batch Distillation -Potential Energy Savings  

E-Print Network [OSTI]

Multivessel Batch Distillation - Potential Energy Savings Bernd Wittgens and Sigurd Skogestad 1, Norway ABSTRACT - A conventional batch distillation column operated under feedback control applying the proposed policy is compared to the multivessel batch distillation column. In some cases we found

Skogestad, Sigurd

314

Potential Yield Mapping of Dedicated Energy Crops  

Broader source: Energy.gov [DOE]

Breakout Session 1B—Integration of Supply Chains I: Breaking Down Barriers Potential Yield Mapping of Dedicated Energy Crops Chris Daly, Director, PRISM Climate Group, Oregon State University

315

Biodegradation Potential of Perfluorooctanoate and Perfluorooctane Sulfonate  

E-Print Network [OSTI]

and fluorine present in PFOA and PFOS makes them stable and resistant to conventional treatment processes. Several advanced chemical processes can degrade PFOA and PFOS under high temperatures and pressures or other extreme conditions. However, the potential...

Thelakkat Kochunarayanan, Parvathy

2012-10-19T23:59:59.000Z

316

Supramolecular nano-stamping : analyzing market potential  

E-Print Network [OSTI]

An analysis was carried out on the process of Supramolecular Nano-Stamping (SuNS) in order to determine whether or not the science involved has market potential in the DNA microarray industry. This industry is rapidly ...

DePalma, Christina Maria

2005-01-01T23:59:59.000Z

317

Renewable Energy Technical Potential | OpenEI  

Open Energy Info (EERE)

Technical Potential Technical Potential Dataset Summary Description No description given. Source National Renewable Energy Laboratory Date Released July 03rd, 2012 (2 years ago) Date Updated July 03rd, 2012 (2 years ago) Keywords biopower csp geothermal hydropower hydrothermal Renewable Energy Technical Potential rooftop United States utility-scale wind Data text/csv icon United States Renewable Energy Technical Potential (csv, 7.7 KiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Time Period License License Open Data Commons Public Domain Dedication and Licence (PDDL) Comment Rate this dataset Usefulness of the metadata Average vote Your vote Usefulness of the dataset Average vote Your vote Ease of access Average vote Your vote Overall rating

318

Siderite, oxidation, and neutralization potential determination  

E-Print Network [OSTI]

Due to the nature of native soils overlying lignite seams in Texas, mixed overburden is allowed as a topsoil substitute. Determination of suitable topsoil replacements is based on chemical analysis, including neutralization potential (NP), a...

Porter, Elizabeth Brooke

2012-06-07T23:59:59.000Z

319

Missing solution in a Cornell potential  

SciTech Connect (OSTI)

Missing bound-state solutions for fermions in the background of a Cornell potential consisting of a mixed scalar–vector–pseudoscalar coupling is examined. Charge-conjugation operation, degeneracy and localization are discussed. -- Highlights: •The Dirac equation with scalar–vector–pseudoscalar Cornell potential is investigated. •The isolated solution from the Sturm–Liouville problem is found. •Charge-conjugation operation, degeneracy and localization are discussed.

Castro, L.B., E-mail: luis.castro@pgfsc.ufsc.br [Departamento de Física, CFM, Universidade Federal de Santa Catarina, 88040-900, Florianópolis - SC (Brazil); Castro, A.S. de, E-mail: castro@pq.cnpq.br [Departamento de Física e Química, Campus de Guaratinguetá, Universidade Estadual Paulista, 12516-410, Guaratinguetá - SP (Brazil)] [Departamento de Física e Química, Campus de Guaratinguetá, Universidade Estadual Paulista, 12516-410, Guaratinguetá - SP (Brazil)

2013-11-15T23:59:59.000Z

320

On the Chemical Potential of Dark Energy  

E-Print Network [OSTI]

It is widely assumed that the observed universe is accelerating due to the existence of a new fluid component called dark energy. In this article, the thermodynamics consequences of a nonzero chemical potential on the dark energy component is discussed with special emphasis to the phantom fluid case. It is found that if the dark energy fluid is endowed with a negative chemical potential, the phantom field hypothesis becomes thermodynamically consistent with no need of negative temperatures as recently assumed in the literature.

S. H. Pereira

2008-06-23T23:59:59.000Z

Note: This page contains sample records for the topic "hd ngv potential" 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

Optimization of multi-pressure himidification-dehumidification desalination using thermal vapor compression and hybridization  

E-Print Network [OSTI]

Humidification-dehumidification (HD or HDH) desalination, and specifically HD driven by a thermal vapor compressor (TVC), is a thermal desalination method that has the potential to produce potable water efficiently in order ...

Mistry, Karan Hemant

322

Optical Properties and Potential Applications of Doped Semiconductor...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Optical Properties and Potential Applications of Doped Semiconductor Nanoparticles. Optical Properties and Potential Applications of Doped Semiconductor Nanoparticles. Abstract:...

323

Environmental Assessment Fact Sheet - Potential Impacts  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

DOE has prepared a draft Environmental Assessment for Conducting Astrophysics and Other Basic Science Experiments at the WIPP Site. It examines the potential environmental consequences from conducting particular types of scientific experiments in an area of the WIPP underground called the experiment gallery. The environmental assessment also looks at the potential cumulative impacts of conducting experiments and operating the WIPP as a transuranic waste repository. This fact sheet presents questions and answers about potential impacts to human health and the environment and proposed protections and mitigations, based on the draft environmental assessment. The deep geologic repository at the WIPP could be the most favorable U.S. environment currently available for experiments in many scientific disciplines, including particle astro-

324

Students, Professors Demonstrating Virginia's Potential | Department of  

Broader source: Energy.gov (indexed) [DOE]

Students, Professors Demonstrating Virginia's Potential Students, Professors Demonstrating Virginia's Potential Students, Professors Demonstrating Virginia's Potential April 23, 2010 - 10:37am Addthis Joshua DeLung What does this project do? James Madison University is spearheading an effort to make at least 25 percent of the energy used in the Shenandoah Valley come from renewable sources as soon as possible. Peter Denbigh's real interest is in finding ways to help Americans save energy - especially in terms of the transportation industry - so it's appropriate that he says "the key is to address the situation effectively so that we don't just spin our wheels and get nowhere." Peter enjoys solving complex problems, including one thing he sees as an urgent situation that is vastly important - energy creation. He earned a

325

Renewables in India : Status and Future Potential  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Renewables in India : Status and Future Potential Renewables in India : Status and Future Potential Speaker(s): Luis Fernandes Date: July 9, 2007 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Galen Barbose We analyse the status and the trends in the growth of renewables in India. We propose a methodology linking micro-simulation to macro-modelling to obtain technical and economic potential estimates for solar water heaters in residential and commercial and biomass gasifiers for thermal applications in industry. We assess the sustainability of renewables based on the criteria of life cycle cost, net energy ratio, resource constraint and greenhouse gas emissions. The renewable based technologies seem to be sustainable based on all criteria, except the high life cycle cost. In some cases e.g. in wind and biomass based systems land availability may

326

renewable energy potential | OpenEI  

Open Energy Info (EERE)

9 9 Varnish cache server Browse Upload data GDR 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 2142258919 Varnish cache server renewable energy potential Dataset Summary Description Global Wind Potential Supply Curves by Country, Class, and Depth (quantities in GW) Source National Renewable Energy Laboratory Date Released July 12th, 2012 (2 years ago) Date Updated July 12th, 2012 (2 years ago) Keywords offshore resource offshore wind renewable energy potential Data application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon offshore_resource_100_vs2.xlsx (xlsx, 41.7 KiB) Quality Metrics Level of Review Peer Reviewed Comment Temporal and Spatial Coverage Frequency Time Period License License Open Data Commons Public Domain Dedication and Licence (PDDL)

327

Wind energy potential in the United States  

SciTech Connect (OSTI)

Estimates of the electricity that could potentially be generated by wind power and of the land area available for wind energy development have been calculated for the contiguous United States. The estimates are based on published wind resource data and exclude windy lands that are not suitable for development as a result of environmental and land-use considerations. Despite these exclusions, the potential electric power from wind energy is surprisingly large. Good wind areas, which cover 6% of the contiguous US land area, have the potential to supply more than one and a half times the current electricity consumption of the United States. Technology under development today will be capable of producing electricity economically from good wind sites in many regions of the country.

Elliott, D.L.; Schwartz, M.N.

1993-06-01T23:59:59.000Z

328

Potential Condensed Fuel for the Milky Way  

E-Print Network [OSTI]

Potential condensed clouds of gas in the Galactic halo are examined in the context of the recent models of cooling, fragmenting clouds building up the baryonic mass of the Galaxy. 582 high-velocity clouds (HVCs) are defined as the potential infalling, condensed clouds and the sample's spatial and velocity distribution are presented. With the majority of the hydrogen in the clouds ionized (~85%), the clouds at a distribution of distances within 150 kpc, and their individual total masses below 10^7 Msun, the total mass in potentially condensed clouds is 1.1 - 1.4 x 10^9 Msun. If the tighter distance constraint of condensing cloud models, as well as feedback and additional accretion methods, are discussed.

M. E. Putman

2006-03-23T23:59:59.000Z

329

Potential energy surfaces for cluster emitting nuclei  

SciTech Connect (OSTI)

Potential energy surfaces are calculated by use of the most advanced asymmetric two-center shell model that allows us to obtain shell-and-pairing corrections that are added to the Yukawa-plus-exponential model deformation energy. Shell effects are of crucial importance for the experimental observation of spontaneous disintegration by heavy-ion emission. Results for {sup 222}Ra, {sup 232}U, {sup 236}Pu, and {sup 242}Cm illustrate the main ideas and show for the first time, for a cluster emitter, a potential barrier obtained by use of the macroscopic-microscopic method.

Poenaru, Dorin N.; Gherghescu, Radu A. [Horia Hulubei National Institute of Physics and Nuclear Engineering, RO-077125 Bucharest-Magurele (Romania); Frankfurt Institute for Advanced Studies, J. W. Goethe Universitaet, Max-von-Laue-Strasse 1, D-60438 Frankfurt (Germany); Greiner, Walter [Frankfurt Institute for Advanced Studies, J. W. Goethe Universitaet, Max-von-Laue-Strasse 1, D-60438 Frankfurt (Germany)

2006-01-15T23:59:59.000Z

330

Nurturing creative potential in kindergarten children  

E-Print Network [OSTI]

Subject: Psychology NURTURING CREATIVE POTENTIAL IN KINDERGARTEN CHILDREN A Thesis 'ulILLIAFl ROBERT OXLEY Approved as to style and content by: hai. man of ommxttee ! ea of epartment l'lember g, P em er Flay 1971 ABSTRACT Iturtur ing Creative... Potential in Kindergarten Children. (I'lay lo71) 11illiam Robert Oxley, B. S. , Texas ALII University; M. Div. , Church Divinity School of Pacific; S. T. M. , University of the South; Directed by: Dr. M. R. Smith Creativity, defined as the process...

Oxley, William Robert

1971-01-01T23:59:59.000Z

331

The new business potential with mobile commerce  

Science Journals Connector (OSTI)

Mobile commerce (m-commerce) has become the latest topic for today. Business organisations have been restlessly evaluating the revenue potential of the m-commerce market and developing business models to exploit the huge profit potential of this new market. This paper provides an overview of the fundamentals about m-commerce and relevant information to help business managers, particularly those without an IT background, to understand the key elements and basic concepts of m-commerce. Some strategies for dealing with m-commerce challenges and future expectation will be addressed.

Chang-tseh Hsieh; Charlotte Jones; Binshan Lin

2008-01-01T23:59:59.000Z

332

Podcasting: are student competencies hindering its potential?  

Science Journals Connector (OSTI)

Currently, podcasting has been overwhelmingly embraced by commercial and community media sources such as T.V. and radio to expand their listening audience. This same concept can be utilised from an educational point of view, where podcasting has the potential to expand flexible learning environments to give students more control over where and when they engage with their learning experience. This paper presents a study on the impact of short podcasts on students and academic staff in the Faculty of Economics and Business, The University of Sydney and has exposed a potential concern about the technical competencies of the student community.

Steve Clark; Lucy Taylor

2010-01-01T23:59:59.000Z

333

Property:PotentialCSPArea | Open Energy Information  

Open Energy Info (EERE)

PotentialCSPArea PotentialCSPArea Jump to: navigation, search Property Name PotentialCSPArea Property Type Quantity Description An area of potential CSP generation. Use this type to express a quantity of two-dimensional space. The default unit is the square meter (m²). http://en.wikipedia.org/wiki/Area Acceptable units (and their conversions) are: Square Meters - 1 m²,m2,m^2,square meter,square meters,Square Meter,Square Meters,Sq. Meters,SQUARE METERS Square Kilometers - 0.000001 km²,km2,km^2,square kilometer,square kilometers,square km,square Kilometers,SQUARE KILOMETERS Square Miles - 0.000000386 mi²,mi2,mi^2,mile²,square mile,square miles,square mi,Square Miles,SQUARE MILES Square Feet - 10.7639 ft²,ft2,ft^2,square feet,square foot,FT²,FT2,FT^2,Square Feet, Square Foot

334

Potential applications of high temperature helium  

SciTech Connect (OSTI)

This paper discusses the DOE MHTGR-SC program`s recent activity to improve the economics of the MHTGR without sacrificing safety performance and two potential applications of high temperature helium, the MHTGR gas turbine plant and a process heat application for methanol production from coal.

Schleicher, R.W. Jr.; Kennedy, A.J.

1992-09-01T23:59:59.000Z

335

Potential applications of high temperature helium  

SciTech Connect (OSTI)

This paper discusses the DOE MHTGR-SC program's recent activity to improve the economics of the MHTGR without sacrificing safety performance and two potential applications of high temperature helium, the MHTGR gas turbine plant and a process heat application for methanol production from coal.

Schleicher, R.W. Jr.; Kennedy, A.J.

1992-09-01T23:59:59.000Z

336

Physics 321 Energy Conservation Potential Energy in  

E-Print Network [OSTI]

of Energy I A sphere rolls without slipping down an incline. Given m, R, and , find the velocity. Identify of Energy III (a) A sphere rolls without slipping down an incline. Given m, R, and , find x(t). 1) WritePhysics 321 Hour 7 Energy Conservation ­ Potential Energy in One Dimension WorkEnergy Theorem

Hart, Gus

337

Motion Planning with Gamma-Harmonic Potential  

E-Print Network [OSTI]

University of Petroleum and Minerals This paper extends the capabilities of the harmonic potential field (HPF into geometrical subregions where each region has an attribute of its own. The suggested approach uses a task) regions and to converge to the goal are provided. The capabilities of the planner are demonstrated using

Masoud, Ahmad A.

338

LABORATORY II ELECTRIC FIELDS AND ELECTRIC POTENTIALS  

E-Print Network [OSTI]

Lab II - 1 LABORATORY II ELECTRIC FIELDS AND ELECTRIC POTENTIALS In this lab you will continue to investigate the abstract concept of electric field. If you know the electric field at a point in space, you). With this simulation you can construct a complicated charge configuration and read out the resulting electric field

Minnesota, University of

339

Your Engineering Future: Discovering Your Potential  

E-Print Network [OSTI]

in the nation. Some of the specialized services offered include: · Two engineering career fairs each year · JobYour Engineering Future: Discovering Your Potential INVESTING WISELY The University of Texas the entire university, the Cockrell School offers engineering students a personalized place to begin

Lightsey, Glenn

340

Spatial resolution in vector potential photoelectron microscopy  

SciTech Connect (OSTI)

The experimental spatial resolution of vector potential photoelectron microscopy is found to be much higher than expected because of the cancellation of one of the expected contributions to the point spread function. We present a new calculation of the spatial resolution with support from finite element ray tracing, and experimental results.

Browning, R. [R. Browning Consultants, 1 Barnhart Place, Shoreham, New York 11786 (United States)] [R. Browning Consultants, 1 Barnhart Place, Shoreham, New York 11786 (United States)

2014-03-15T23:59:59.000Z

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


341

Comparative evolution: latent potentials for anagenetic advance  

Science Journals Connector (OSTI)

...on an island to a swimming penguin that hatches...improve- ments in the efficiency of the process may...increments in functional efficiency result in negligible...within their gene pools genes or gene combinations...respect to gene pools and genetic potentialities...source of carbon and energy in chemostats...

G L Stebbins; D L Hartl

1988-01-01T23:59:59.000Z

342

Hydropower Potential Studies Reviewed for Scoping Study  

E-Print Network [OSTI]

Feasibility Study on Five Potential Hydroelectric Power Generation Locations, North Unit Irrigation District B/ENERGY STORAGE PROJECTS C1 Assessment of Opportunities for New US Pumped Storage Hydroelectric Plants Using Hydroelectric Pumped Storage for Enabling Variable Energy Resources within the FCRPS C4 Technical Analysis

343

POTENTIAL ENERGY SAVINGS OF MULTIVESSEL BATCH DISTILLATION  

E-Print Network [OSTI]

POTENTIAL ENERGY SAVINGS OF MULTIVESSEL BATCH DISTILLATION Bernd Wittgens and Sigurd Skogestad 1, Norway ABSTRACT - A conventional batch distillation column operated under feedback control applying the proposed policy is compared to the multivessel batch distillation column. In some cases we found

Skogestad, Sigurd

344

Multivessel Batch Distillation Potential Energy Savings  

E-Print Network [OSTI]

Multivessel Batch Distillation ­ Potential Energy Savings Bernd Wittgens and Sigurd Skogestad 1, Norway ABSTRACT ­ A conventional batch distillation column operated under feedback control applying the proposed policy is compared to the multivessel batch distillation column. In some cases we found

Skogestad, Sigurd

345

POTENTIAL ENERGY SAVINGS OF MULTIVESSEL BATCH DISTILLATION  

E-Print Network [OSTI]

POTENTIAL ENERGY SAVINGS OF MULTIVESSEL BATCH DISTILLATION Bernd Wittgens and Sigurd Skogestad 1, Norway ABSTRACT ­ A conventional batch distillation column operated under feedback control applying the proposed policy is compared to the multivessel batch distillation column. In some cases we found

Skogestad, Sigurd

346

Soil Washing Potential of a Natural Surfactant  

Science Journals Connector (OSTI)

Soil Washing Potential of a Natural Surfactant ... The aqueous solubilities of hexachlorobenzene (HCB) and naphthalene in the natural surfactant solutions were found to vary linearly with the concentration of the surfactant showing trends comparable to that of typical com mercial surfactants. ...

D. Roy; R. R. Kommalapati; S. S. Mandava; K. T. Valsaraj; W. D. Constant

1997-02-27T23:59:59.000Z

347

Carbon Sequestration Potential of Extensive Green Roofs  

Science Journals Connector (OSTI)

Two studies were conducted with the objective of quantifying the carbon storage potential of extensive green roofs. The first was performed on eight roofs in Michigan and four roofs in Maryland, ranging from 1 to 6 years in age. All 12 green roofs were ...

Kristin L. Getter; D. Bradley Rowe; G. Philip Robertson; Bert M. Cregg; Jeffrey A. Andresen

2009-08-25T23:59:59.000Z

348

CALIFORNIA ENERGY Small HVAC Problems and Potential  

E-Print Network [OSTI]

CALIFORNIA ENERGY COMMISSION Small HVAC Problems and Potential Savings Reports Summary of Problems of the Integrated Design of Small Commercial HVAC Systems research project. The reports are a result of funding: Productivity and Interior Environments Integrated Design of Large Commercial HVAC Systems Integrated Design

349

Growing Sandalwood in Nepal--Potential  

E-Print Network [OSTI]

Growing Sandalwood in Nepal--Potential Silvicultural Methods and Research Priorities1 Peter E. Neil 2 Abstract: Interest in sandalwood has increased recently in Nepal as a result of a royal directive establishment of sandalwood in Nepal. The silvicultural methods discussed could well be of use to other

Standiford, Richard B.

350

Global potential for wind-generated electricity  

Science Journals Connector (OSTI)

...monthly averages of wind power production...negative. Very large wind power penetration...forms. Plug-in hybrid electric vehicles...excesses in electricity system, while energy-rich...storage. Potential wind-generated electricity...only wind but also solar. The additional...

Xi Lu; Michael B. McElroy; Juha Kiviluoma

2009-01-01T23:59:59.000Z

351

An analysis of Guatemalan wind potential  

Science Journals Connector (OSTI)

This paper contains an analysis of Guatemalan wind potential based on hourly measurements of wind velocity made by the National Institute of Meteorology (INSIVUMEH), using anemometers at a height of 10 m, in seven different places. Due to the complex terrain of the country the results must be considered as representative only of the particular place in which the measurements were made.

Mario E. Rivera G.

1987-01-01T23:59:59.000Z

352

Potential for Biofuel-based Greenhouse Gas Emission Mitigation: Rationale and Potential  

E-Print Network [OSTI]

1 Potential for Biofuel-based Greenhouse Gas Emission Mitigation: Rationale and Potential By Bruce biofuel usage. Biofuel feedstocks are a source of raw material that can be transformed into petroleum for coal. In the USA, liquid fuel biofuel production has not proven to be broadly economically feasible

McCarl, Bruce A.

353

Potential Carriers and Approaches for Hydrogen Delivery  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Carriers and Potential Carriers and Carriers and Potential Carriers and Approaches for Hydrogen Approaches for Hydrogen Delivery Delivery TIAX LLC 1601 S. D Anza Blvd. Cupertino CA, 95014 Tel. 408-517-1550 Reference: D0348 © 2007 TIAX LLC Hydrogen Delivery Analysis Meeting May 8-9, 2007 Columbia, Maryland Matthew Hooks Stefan Unnasch Stephen Lasher 1 Novel Hydrogen Carriers Project Overview Cost Density (wt. and vol.) Energy requirements Forecourt storage requirements Codes and standards H H 2 2 Plant, Liquefier, LH Plant, Liquefier, LH 2 2 storage storage H H 2 2 Tube Trailer Tube Trailer LH 2 2 Tank/ Fueling Station LH Tank/ Fueling Station The efficient delivery of hydrogen is necessary for the adoption of hydrogen as a transportation fuel, but numerous challenges must be met. 2 "Conventional" delivery options are limited by volumetric density,

354

Clot Busting Simulations Test Potential Stroke Treatment  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Clot Busting Clot Busting Simulations Test Potential Stroke Treatment Clot Busting Simulations Test Potential Stroke Treatment September 24, 2013 | Tags: Biological and Environmental Research (BER), Franklin Contact: Linda Vu, +1 510 495 2402, lvu@lbl.gov Calvariasetup.jpg The array transducer in position above the calvaria (skull). Shown are the ends of the array elements above the computational model of the skull. Researchers are using computer simulations to investigate how ultrasound and tiny bubbles injected into the bloodstream might break up blood clots, limiting the damage caused by a stroke in its first hours. Strokes are the most common cause of long-term disability in the United States and the third most common cause of death. More than 795,000 Americans suffer a stroke every year, which happens when a clot blocks an

355

Wind Energy Potential in SE New Mexico  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

click to return to the Renewable Energy page click to return to the Renewable Energy page Return to Renewable Energy Page Wind Energy in Southeast New Mexico Several Ongoing and New Wind Power Projects are Contributing to Making Renewable Energy Sources an Important Economic and Environmental Mainstay of the Region As the accompanying map of New Mexico shows, the best wind power generation potential near WIPP is along the Delaware Mountain ridge line of the southern Guadalupe Mountains, about 50-60 miles southwest. The numeric grid values indicate wind potential, with a range from 1 (poor) to 7 (superb). Just inside Texas in the southern Guadalupe Mountains, the Delaware Mountain Wind Power Facility in Culbertson County, Texas currently generates over 30 MW, and could be expanded to a 250 MW station.

356

Brueckner Reaction Matrix and Separable Potentials  

Science Journals Connector (OSTI)

The binding energy of He4 and O16 was calculated using reaction matrix elements of Tabakin's potential. A separable form of the potential has been used to reduce the basic equation to a simple linear algebraic system. The Pauli operator Q defined in terms of harmonic-oscillator intermediate states permits an easy and accurate calculation. Our numerical results for the binding energies include the first- and second-order contributions. A very resonable agreement between the experimental and theoretical values has been obtained, since the occupied-state energies are made nearly self-consistent and a cancellation of other important higher-order contributions has been achieved by a shift of the entire harmonic-oscillator spectra.

M. Gmitro and M. Sotona

1970-08-01T23:59:59.000Z

357

Semimetalic graphene in a modulated electric potential  

E-Print Network [OSTI]

The $\\pi$-electronic structure of graphene in the presence of a modulated electric potential is investigated by the tight-binding model. The low-energy electronic properties are strongly affected by the period and field strength. Such a field could modify the energy dispersions, destroy state degeneracy, and induce band-edge states. It should be noted that a modulated electric potential could make semiconducting graphene semimetallic, and that the onset period of such a transition relies on the field strength. There exist infinite Fermi-momentum states in sharply contrast with two crossing points (Dirac points) for graphene without external fields. The finite density of states (DOS) at the Fermi level means that there are free carriers, and, at the same time, the low DOS spectrum exhibits many prominent peaks, mainly owing to the band-edge states.

J. H. Ho; Y. H. Chiu; S. J. Tsai; M. F. Lin

2008-09-09T23:59:59.000Z

358

Probing Quintessence Potential with Future Cosmological Surveys  

E-Print Network [OSTI]

Quintessence, a scalar field model, has been proposed to account for the acceleration of the Universe at present. We discuss how accurately quintessence models are discriminated by future cosmological surveys, which include experiments of CMB, galaxy clustering, weak lensing, and the type Ia SNe surveys, by making use of the conventional parameterized dark energy models. We can see clear differences between the thawing and the freezing quintessence models at more than $1\\sigma$ ($2\\sigma$) confidence level as long as the present equation of state for quintessence is away from $-1$ as $w_X \\gtrsim -0.95 (-0.90)$. However, it is found to be difficult to probe the effective mass squared for the potential in thawing models, whose signs are different between the quadratic and the cosine-type potentials. This fact may require us to invent a new estimator to distinguish quintessence models beyond the thawing and the freezing ones.

Takeuchi, Yoshitaka; Takahashi, Tomo; Yamaguchi, Masahide

2014-01-01T23:59:59.000Z

359

Probing Quintessence Potential with Future Cosmological Surveys  

E-Print Network [OSTI]

Quintessence, a scalar field model, has been proposed to account for the acceleration of the Universe at present. We discuss how accurately quintessence models are discriminated by future cosmological surveys, which include experiments of CMB, galaxy clustering, weak lensing, and the type Ia SNe surveys, by making use of the conventional parameterized dark energy models. We can see clear differences between the thawing and the freezing quintessence models at more than $1\\sigma$ ($2\\sigma$) confidence level as long as the present equation of state for quintessence is away from $-1$ as $w_X \\gtrsim -0.95 (-0.90)$. However, it is found to be difficult to probe the effective mass squared for the potential in thawing models, whose signs are different between the quadratic and the cosine-type potentials. This fact may require us to invent a new estimator to distinguish quintessence models beyond the thawing and the freezing ones.

Yoshitaka Takeuchi; Kiyotomo Ichiki; Tomo Takahashi; Masahide Yamaguchi

2014-01-27T23:59:59.000Z

360

Interquark potential model for multiquark systems  

Science Journals Connector (OSTI)

A potential model for four interacting quarks is constructed in SU(2) from six basis states—the three partitions into quark pairs, where the gluon field is either in its ground state or first excited state. With four independent parameters to describe the interactions connecting these basis states, it is possible to fit 100 pieces of data—the ground and first excited states of configurations from six different four-quark geometries calculated on a 163×32 lattice.

A. M. Green and P. Pennanen

1998-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "hd ngv potential" 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

BAYESIAN ESTIMATION OF FUEL ECONOMY POTENTIAL  

E-Print Network [OSTI]

BAYESIAN ESTIMATION OF FUEL ECONOMY POTENTIAL DUE TO TECHNOLOGY IMPROVEMENTS by Richard W. Andrews in the engineering assessment phase of this project: N.T. Barnes, B. Beeson, R.C. Belaire, W.C. Follmer, R.J. Genik, R.C. Heathfield, T.E. Kenney, D.L. Kulp, J.G. LaFond, J.D. Medrick, N.M. Novelli, G. Pietron, N

Berger, Jim

362

Measurement of the somatosensory magnetic evoked potential  

E-Print Network [OSTI]

MEASUREMENT OF THE SOMATOSENSORY MAGNETIC EVOKED POTENTIAL A Thesis BENJAMIN LEWIS PASHKOFF Submitted to the Graduate College of Texas A6M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE December... ' [8] L. Kaufman, and 5, Williamson, "The Evoked Magnetic Field of the Human Brain, " Annals of the New York ~adeay of Sciences, vol. 126, pp. 45-64, 1980. 38 [9] M. Reite, J. T. Zimmerman, J. E. Zimmerman, "Magnetic Auditory Evoked Fields...

Pashkoff, Benjamin Lewis

2012-06-07T23:59:59.000Z

363

The IAEA: Neutralizing Iraq's nuclear weapons potential  

SciTech Connect (OSTI)

With support from UNSCOM and staff members from several countries, the IAEA has succeeded in identifying and destroying most of Iraq's nuclear weapons potential. IAEA activities in Iraq have also established a sound basis for long-term monitoring of Iraq. This will involve several procedures and techniques, including the periodic monitoring of Iraq's main bodies of water and unannounced visits of resident inspectors to plants, factories, and research centers.

Zifferero, M.

1993-04-01T23:59:59.000Z

364

On the Quintessence Scalar Field Potential  

E-Print Network [OSTI]

In this work we propose a new analytical method for determining the scalar field potential $V(\\phi)$ in FRW type cosmologies containing a mixture of perfect fluid plus a quintessence scalar field. By assuming that the equation of state parameters of the perfect fluid, $\\gamma -1 \\equiv p_{\\gamma}/\\rho_{\\gamma}$ and the quintessence, $\\omega \\equiv p/\\rho$ are constants, it is shown that the potential for the flat case is $V(\\phi) = A\\rho_{\\phi_{0}}\\sinh^{B}(\\lambda \\phi)$, where $A$, $B$ and $\\lambda$ are functions of $\\gamma$ and $\\omega$. This general result is a pure consequence of the Einstein field equations and the constancy of the parameters. Applying the same method for closed and open universes, the corresponding scalar field potentials are also explicitly obtained for a large set of values of the free parameters $\\gamma$ and $\\omega$. A formula yielding the transition redshift from a decelerating to an accelerating regime is also determined and compared to the $\\Lambda$CDM case.

J. A. Espichán Carrillo; J. M. Silva; J. A. S. Lima

2008-06-20T23:59:59.000Z

365

Nonlinear Lattice Waves in Random Potentials  

E-Print Network [OSTI]

Localization of waves by disorder is a fundamental physical problem encompassing a diverse spectrum of theoretical, experimental and numerical studies in the context of metal-insulator transition, quantum Hall effect, light propagation in photonic crystals, and dynamics of ultra-cold atoms in optical arrays. Large intensity light can induce nonlinear response, ultracold atomic gases can be tuned into an interacting regime, which leads again to nonlinear wave equations on a mean field level. The interplay between disorder and nonlinearity, their localizing and delocalizing effects is currently an intriguing and challenging issue in the field. We will discuss recent advances in the dynamics of nonlinear lattice waves in random potentials. In the absence of nonlinear terms in the wave equations, Anderson localization is leading to a halt of wave packet spreading. Nonlinearity couples localized eigenstates and, potentially, enables spreading and destruction of Anderson localization due to nonintegrability, chaos and decoherence. The spreading process is characterized by universal subdiffusive laws due to nonlinear diffusion. We review extensive computational studies for one- and two-dimensional systems with tunable nonlinearity power. We also briefly discuss extensions to other cases where the linear wave equation features localization: Aubry-Andre localization with quasiperiodic potentials, Wannier-Stark localization with dc fields, and dynamical localization in momentum space with kicked rotors.

Sergej Flach

2014-09-10T23:59:59.000Z

366

Unidirectionally Invisible Potentials as Local Building Blocks of all Scattering Potentials  

E-Print Network [OSTI]

We give a complete solution of the problem of constructing a scattering potential v(x) that possesses scattering properties of one's choice at an arbitrary prescribed wavenumber. Our solution involves expressing v(x) as the sum of at most six unidirectionally invisible finite-range potentials for which we give explicit formulas. Our results can be employed for designing optical potentials. We discuss its application in modeling threshold lasers, coherent perfect absorbers, and bidirectionally and unidirectionally reflectionless absorbers, amplifiers, and phase shifters.

Ali Mostafazadeh

2014-07-04T23:59:59.000Z

367

Mechanisms controlling soil carbon turnover and their potential...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

controlling soil carbon turnover and their potential application for enhancing carbon sequestration . Mechanisms controlling soil carbon turnover and their potential application...

368

Midstream Infrastructure Improvements Key to Realizing Full Potential...  

Office of Environmental Management (EM)

Midstream Infrastructure Improvements Key to Realizing Full Potential of Domestic Natural Gas Midstream Infrastructure Improvements Key to Realizing Full Potential of Domestic...

369

Electron absorption by complex potentials: One-dimensional case  

Science Journals Connector (OSTI)

We investigate the electronic absorption induced by a complex potential in one-dimensional quantum mechanics. By solving the Schrödinger equation for spatially localized and extended complex potentials, we derive the electronic absorption coefficient ?. Neither a single nor a double Dirac-? potential can represent a totally absorbing potential (?=1) for any choice of the complex amplitude of the potential. Maximum absorption coefficients for these potential types are 0.5 and 2(?2-1)?0.828, respectively. On the contrary, wall and well potentials do account for total absorption at a particular limit of the potential parameters. © 1996 The American Physical Society.

Patrici Molinàs-Mata and Pau Molinàs-Mata

1996-09-01T23:59:59.000Z

370

Potential Impacts of Hydrokinetic and Wave Energy Conversion...  

Broader source: Energy.gov (indexed) [DOE]

Potential Impacts of Hydrokinetic and Wave Energy Conversion Technologies on Aquatic Environments Potential Impacts of Hydrokinetic and Wave Energy Conversion Technologies on...

371

Africa - Technical Potential of Solar Energy to Address Energy...  

Open Energy Info (EERE)

Africa - Technical Potential of Solar Energy to Address Energy Poverty and Avoid GHG Emissions Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Technical Potential of...

372

Design Potential of Metal Foil Substrates for Optimized DOC Performanc...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Design Potential of Metal Foil Substrates for Optimized DOC Performance Design Potential of Metal Foil Substrates for Optimized DOC Performance Poster presentation at the 2007...

373

Researchers find potential key for unlocking biomass energy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Unlocking biomass energy Researchers find potential key for unlocking biomass energy Potential pretreatment method that can make plant cellulose five times more digestible by...

374

Energy Department Report Finds Major Potential to Increase Clean...  

Energy Savers [EERE]

Department Report Finds Major Potential to Increase Clean Hydroelectric Power Energy Department Report Finds Major Potential to Increase Clean Hydroelectric Power April 17, 2012 -...

375

Energy Dept. Report Finds Major Potential to Grow Clean, Sustainable...  

Energy Savers [EERE]

Related Articles Energy Department Report Finds Major Potential to Increase Clean Hydroelectric Power This map demonstrates the potential capacity to generate clean hydroelectric...

376

Combined Heat and Power Market Potential for Opportunity Fuels...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Combined Heat and Power Market Potential for Opportunity Fuels, August 2004 Combined Heat and Power Market Potential for Opportunity Fuels, August 2004 The purpose of this 2004...

377

Meeting Concerning Potential Test Procedures and Energy Conservation...  

Broader source: Energy.gov (indexed) [DOE]

Concerning Potential Test Procedures and Energy Conservation Standards for Set-Top Boxes and Network Equipment Meeting Concerning Potential Test Procedures and Energy Conservation...

378

Direct Experimental Observation of the Low Ionization Potentials...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Observation of the Low Ionization Potentials of Guanine in Free Oligonucleotides by Using Photoelectron Direct Experimental Observation of the Low Ionization Potentials of Guanine...

379

Stable Free Radicals and Potential Implications for Health Effects...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Stable Free Radicals and Potential Implications for Health Effects of Diesel Emissions Stable Free Radicals and Potential Implications for Health Effects of Diesel Emissions 2005...

380

Potential of High-Throughput Experimentation with Ammonia Borane...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Potential of High-Throughput Experimentation with Ammonia Borane Solid Hydrogen Storage Materials (presentation) Potential of High-Throughput Experimentation with Ammonia Borane...

Note: This page contains sample records for the topic "hd ngv potential" 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

PNNL: About: EMS Control of Potential Environmental Impacts  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

air emissions from vehicle exhaust and boilers, and potential emissions can come from refrigeration systems, fire suppression systems, and demolition operations. Our potential...

382

Fuel Efficiency Potential of Hydrogen Vehicles | Department of...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Efficiency Potential of Hydrogen Vehicles Fuel Efficiency Potential of Hydrogen Vehicles 2009 DOE Hydrogen Program and Vehicle Technologies Program Annual Merit Review and Peer...

383

Thermodynamic Evaluation of Low-Global Warming Potential Refrigerants...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Thermodynamic Evaluation of Low-Global Warming Potential Refrigerants - 2013 Peer Review Thermodynamic Evaluation of Low-Global Warming Potential Refrigerants - 2013 Peer Review...

384

Working Fluids Low Global Warming Potential Refrigerants - 2013...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Working Fluids Low Global Warming Potential Refrigerants - 2013 Peer Review Working Fluids Low Global Warming Potential Refrigerants - 2013 Peer Review Emerging Technologies...

385

Hydraulic HEV Fuel Consumption Potential | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Consumption Potential Hydraulic HEV Fuel Consumption Potential 2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation...

386

Unlocking the Potential of Additive Manufacturing in the Fuel...  

Broader source: Energy.gov (indexed) [DOE]

Unlocking the Potential of Additive Manufacturing in the Fuel Cells Industry Unlocking the Potential of Additive Manufacturing in the Fuel Cells Industry PDF includes slides from...

387

Potential Oil Production from the Coastal Plain of the Arctic...  

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

Potential Oil Production from the Coastal Plain of the Arctic National Wildlife Refuge: Updated Assessment Executive Summary This Service Report, Potential Oil Production from the...

388

FUEL CYCLE POTENTIAL WASTE FOR DISPOSITION  

SciTech Connect (OSTI)

The United States (U.S.) currently utilizes a once-through fuel cycle where used nuclear fuel (UNF) is stored on-site in either wet pools or in dry storage systems with ultimate disposal in a deep mined geologic repository envisioned. Within the Department of Energy's (DOE) Office of Nuclear Energy (DOE-NE), the Fuel Cycle Research and Development Program (FCR&D) develops options to the current commercial fuel cycle management strategy to enable the safe, secure, economic, and sustainable expansion of nuclear energy while minimizing proliferation risks by conducting research and development of advanced fuel cycles, including modified open and closed cycles. The safe management and disposition of used nuclear fuel and/or nuclear waste is a fundamental aspect of any nuclear fuel cycle. Yet, the routine disposal of used nuclear fuel and radioactive waste remains problematic. Advanced fuel cycles will generate different quantities and forms of waste than the current LWR fleet. This study analyzes the quantities and characteristics of potential waste forms including differing waste matrices, as a function of a variety of potential fuel cycle alternatives including: (1) Commercial UNF generated by uranium fuel light water reactors (LWR). Four once through fuel cycles analyzed in this study differ by varying the assumed expansion/contraction of nuclear power in the U.S. (2) Four alternative LWR used fuel recycling processes analyzed differ in the reprocessing method (aqueous vs. electro-chemical), complexity (Pu only or full transuranic (TRU) recovery) and waste forms generated. (3) Used Mixed Oxide (MOX) fuel derived from the recovered Pu utilizing a single reactor pass. (4) Potential waste forms generated by the reprocessing of fuels derived from recovered TRU utilizing multiple reactor passes.

Carter, J.

2011-01-03T23:59:59.000Z

389

FUEL CYCLE POTENTIAL WASTE FOR DISPOSITION  

SciTech Connect (OSTI)

The United States (U.S.) currently utilizes a once-through fuel cycle where used nuclear fuel (UNF) is stored on-site in either wet pools or in dry storage systems with ultimate disposal in a deep mined geologic repository envisioned. Within the Department of Energy's (DOE) Office of Nuclear Energy (DOE-NE), the Fuel Cycle Research and Development Program (FCR&D) develops options to the current commercial fuel cycle management strategy to enable the safe, secure, economic, and sustainable expansion of nuclear energy while minimizing proliferation risks by conducting research and development of advanced fuel cycles, including modified open and closed cycles. The safe management and disposition of used nuclear fuel and/or nuclear waste is a fundamental aspect of any nuclear fuel cycle. Yet, the routine disposal of used nuclear fuel and radioactive waste remains problematic. Advanced fuel cycles will generate different quantities and forms of waste than the current LWR fleet. This study analyzes the quantities and characteristics of potential waste forms including differing waste matrices, as a function of a variety of potential fuel cycle alternatives including: (1) Commercial UNF generated by uranium fuel light water reactors (LWR). Four once through fuel cycles analyzed in this study differ by varying the assumed expansion/contraction of nuclear power in the U.S; (2) Four alternative LWR used fuel recycling processes analyzed differ in the reprocessing method (aqueous vs. electro-chemical), complexity (Pu only or full transuranic (TRU) recovery) and waste forms generated; (3) Used Mixed Oxide (MOX) fuel derived from the recovered Pu utilizing a single reactor pass; and (4) Potential waste forms generated by the reprocessing of fuels derived from recovered TRU utilizing multiple reactor passes.

Jones, R.; Carter, J.

2010-10-13T23:59:59.000Z

390

Oil history, potential converge in Azerbaijan  

SciTech Connect (OSTI)

Azerbaijan, the oldest known oil producing region in the world, still holds great potential for new discoveries and increased production. A multi-billion dollar production sharing agreement was recently signed with a consortium of primarily western oil companies to develop three oil fields in the Caspian Sea. Soon, Azerbaijan will offer new exploration acreage both offshore and onshore. This paper describes the history of oil production in Azerbaijan, offshore developments, tectonics, stratigraphy, petroleum traps, mud volcanoes, and short summaries of several oil producing areas. Current production is about 9 million tons/yr of oil and 7 billion cu m/yr of natural gas.

Narimanov, A.A. [State Oil Co. of Azerbaijan, Baku (Azerbaijan); Palaz, I. [Amoco Production Co., Houston, TX (United States)

1995-05-22T23:59:59.000Z

391

Theoretical studies of potential energy surfaces  

SciTech Connect (OSTI)

The goal of this program is to calculate accurate potential energy surfaces (PES) for both reactive and nonreactive systems. To do this the electronic Schrodinger equation must be solved. Our approach to this problem starts with multiconfiguration self-consistent field (MCSCF) reference wavefunctions. These reference wavefunctions are designed to be sufficiently flexible to accurately describe changes in electronic structure over a broad range of geometries. Electron correlation effects are included via multireference, singles and doubles configuration interaction (MRSDCI) calculations. With this approach, the authors are able to provide useful predictions of the energetics for a broad range of systems.

Harding, L.B. [Argonne National Laboratory, IL (United States)

1993-12-01T23:59:59.000Z

392

Spinor One-forms as Gravitational Potentials  

E-Print Network [OSTI]

General relativity is derived from an action which is quadratic in the covariant derivative of certain spinor one-form gravitational potentials. Either a pair of 2-component spinor one-forms or a single Dirac spinor one-form can be employed. The metric is a quadratic function of these spinor one-forms. In the 2-component spinor formulation the action differs from the usual chiral action for general relativity by a total differential. In the Dirac spinor formulation the action is the real part of the former one. The Hamiltonian is related to the ones in positive energy proofs and spinorial quasilocal mass constructions.

Roh Suan Tung; Ted Jacobson

1995-02-23T23:59:59.000Z

393

Quantum potential energy as concealed motion  

E-Print Network [OSTI]

It is known that the Schroedinger equation may be derived from a hydrodynamic model in which the Lagrangian position coordinates of a continuum of particles represent the quantum state. Using Routh\\s method of ignorable coordinates it is shown that the quantum potential energy of particle interaction that represents quantum effects in this model may be regarded as the kinetic energy of additional concealed freedoms. The method brings an alternative perspective to Planck\\s constant, which plays the role of a hidden variable, and to the canonical quantization procedure, since what is termed kinetic energy in quantum mechanics may be regarded literally as energy due to motion.

Peter Holland

2014-11-13T23:59:59.000Z

394

The conical resistor conundrum: A potential solution  

Science Journals Connector (OSTI)

A truncated cone made of material of uniform resistivity is given in many introductory physics texts as a nontrivial problem in the computation of resistance. The intended method and answer are incorrect and the problem cannot be solved by elementary means. In this paper we (i) discuss the physics of current flow in a nonconstant cross?section conductor (ii) examine the flaws in the ‘‘standard’’ solution for the truncated cone (iii) present a computed resistance found from a numerically generated solution for the electrical potential in the truncated cone and (iv) consider whether any problem exists to which the standard solution applies.

Joseph D. Romano; Richard H. Price

1996-01-01T23:59:59.000Z

395

Geothermal: Sponsored by OSTI -- The Potential Impacts on Aquatic...  

Office of Scientific and Technical Information (OSTI)

The Potential Impacts on Aquatic Ecosystems from the Release of Trace Elements in Geothermal Fluids...

396

Organic Fruits and Vegetables: Potential Health Benefits and Risks  

E-Print Network [OSTI]

conventional crops. Safeguards against the potential microbiological danger of manure have included composting

Chen, Michael C

2005-01-01T23:59:59.000Z

397

Mechanical Surface Waves Accompany Action Potential Propagation  

E-Print Network [OSTI]

Many studies have shown that a mechanical displacement of the axonal membrane accompanies the electrical pulse defining the Action Potential (AP). Despite a large and diverse body of experimental evidence, there is no theoretical consensus either for the physical basis of this mechanical wave nor its interdependence with the electrical signal. In this manuscript we present a model for these mechanical displacements as arising from the driving of surface wave modes in which potential energy is stored in elastic properties of the neuronal membrane and cytoskeleton while kinetic energy is carried by the axoplasmic fluid. In our model these surface waves are driven by the traveling wave of electrical depolarization that characterizes the AP, altering the compressive electrostatic forces across the membrane as it passes. This driving leads to co-propagating mechanical displacements, which we term Action Waves (AWs). Our model for these AWs allows us to predict, in terms of elastic constants, axon radius and axoplasmic density and viscosity, the shape of the AW that should accompany any traveling wave of voltage, including the AP predicted by the Hodgkin and Huxley (HH) equations. We show that our model makes predictions that are in agreement with results in experimental systems including the garfish olfactory nerve and the squid giant axon. We expect our model to serve as a framework for understanding the physical origins and possible functional roles of these AWs in neurobiology.

Ahmed El Hady; Benjamin B. Machta

2014-07-28T23:59:59.000Z

398

Handling and Packaging a Potentially Radiologically Contaminated Patient |  

Broader source: Energy.gov (indexed) [DOE]

Handling and Packaging a Potentially Radiologically Contaminated Handling and Packaging a Potentially Radiologically Contaminated Patient Handling and Packaging a Potentially Radiologically Contaminated Patient The purpose of this procedure is to provide guidance to EMS care providers for properly handling and packaging potentially radiologically contaminated patients. This procedure applies to Emergency Medical Service care providers who respond to a radioactive material transportation incident that involves potentially contaminated injuries. Handling and Packaging a Potentially Radiologically Contaminated Patient.docx More Documents & Publications Pre-Hospital Practices for Handling a Radiologically Contaminated Patient Medical Examiner/Coroner on the Handling of a Body/Human Remains that are Potentially Radiologically Contaminated

399

Strictly finite-range potential for light and heavy nuclei  

Science Journals Connector (OSTI)

Strictly finite-range (SFR) potentials are exactly zero beyond their finite range. Single-particle energies and densities, as well as S-matrix pole trajectories, are studied in a few SFR potentials suited for the description of neutrons interacting with light and heavy nuclei. The SFR potentials considered are the standard cutoff Woods-Saxon (CWS) potentials and two potentials approaching zero smoothly: the SV potential introduced by Salamon and Vertse [Phys. Rev. C 77, 037302 (2008)] and the SS potential of Sahu and Sahu [Int. J. Mod. Phys. E 21, 1250067 (2012)]. The parameters of these latter potentials were set so that the potentials may be similar to the CWS shape. The range of the SV and SS potentials scales with the cube root of the mass number of the core like the nuclear radius itself. For light nuclei a single term of the SV potential (with a single parameter) is enough for a good description of the neutron-nucleus interaction. The trajectories are compared with a benchmark for which the starting points (belonging to potential depth zero) can be determined independently. Even the CWS potential is found to conform to this benchmark if the range is identified with the cutoff radius. For the CWS potentials some trajectories show irregular shapes, while for the SV and SS potentials all trajectories behave regularly.

P. Salamon; R. G. Lovas; R. M. Id Betan; T. Vertse; L. Balkay

2014-05-13T23:59:59.000Z

400

ANALYSIS OF CHP POTENTIAL AT FEDERAL SITES  

SciTech Connect (OSTI)

This document was prepared at the request of the U.S. Department of Energy's (DOE's) Federal Energy Management Program (FEMP) under its Technical Guidance and Assistance and Project Financing Programs. The purpose was to provide an estimate of the national potential for combined heat and power (also known as CHP; cogeneration; or cooling, heating, and power) applications at federal facilities and the associated costs and benefits including energy and emission savings. The report provides a broad overview for the U.S. Department of Energy (DOE) and other agencies on when and where CHP systems are most likely to serve the government's best interest. FEMP's mission is to reduce the cost to and environmental impact of the federal government by advancing energy efficiency and water conservation, promoting the use of renewable energy, and improving utility management decisions at federal sites. FEMP programs are driven by its customers: federal agency sites. FEMP monitors energy efficiency and renewable energy technology developments and mounts ''technology-specific'' programs to make technologies that are in strong demand by agencies more accessible. FEMP's role is often one of helping the federal government ''lead by example'' through the use of advanced energy efficiency/renewable energy (EERE) technologies in its own buildings and facilities. CHP was highlighted in the Bush Administration's National Energy Policy Report as a commercially available technology offering extraordinary benefits in terms of energy efficiencies and emission reductions. FEMP's criteria for emphasizing a technology are that it must be commercially available; be proven but underutilized; have a strong constituency and momentum; offer large energy savings and other benefits of interest to federal sites and FEMP mission; be in demand; and carry sufficient federal market potential. As discussed in the report, CHP meets all of these criteria. Executive Order 13123 directs federal facilities to use CHP when life-cycle costs indicate energy reduction goals will be met. FEMP can assist facilities to conduct this analysis. The model developed for this report estimates the magnitude of CHP that could be implemented under various performance and economic assumptions associated with different applications. This model may be useful for other energy technologies. It can be adapted to estimate the market potential in federal buildings for any energy system based on the cost and performance parameters that a user desires to assess. The model already incorporates a standard set of parameters based on available data for federal buildings including total building space, building type, energy use intensity, fuel costs, and the performance of many prime movers commonly used in CHP applications. These and other variables can be adjusted to meet user needs or updated in the future as new data become available.

HADLEY, S.W.

2002-03-11T23:59:59.000Z

Note: This page contains sample records for the topic "hd ngv potential" 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

Worker and Environmental Assessment of Potential Unbound  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Environmental Assessment Environmental Assessment of Potential Unbound Engineered Nanoparticle Releases Phase II Final Report: Preliminary Control Band Development Prepared by Gary Casuccio and Randall Ogle RJ Lee Group, Inc. and Linnea Wahl and Ron Pauer E. O. Lawrence Berkeley National Laboratory September 2009 RJ Lee Group, Inc. Monroeville, PA 15146 Ernest Orlando Lawrence Berkeley National Laboratory Berkeley, CA 94720 This work was supported by the Director, Office of Science, U.S. Department of Energy under Contract No. DE- AC02-05CH11231. List of Contributors RJ Lee Group, Inc. Kristin Bunker Traci Lersch Lawrence Berkeley National Laboratory Leo Banchik Vincent Battaglia Jay James Ki-Joon Jeon Guy Kelley Rick Kelly John Kerr Robert Kostecki

402

Uranium Metal: Potential for Discovering Commercial Uses  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Uranium Metal Uranium Metal Potential for Discovering Commercial Uses Steven M. Baker, Ph.D. Knoxville Tn 5 August 1998 Summary Uranium Metal is a Valuable Resource 3 Large Inventory of "Depleted Uranium" 3 Need Commercial Uses for Inventory  Avoid Disposal Cost  Real Added Value to Society 3 Uranium Metal Has Valuable Properties  Density  Strength 3 Market will Come if Story is Told Background The Nature of Uranium Background 3 Natural Uranium: 99.3% U238; 0.7% U 235 3 U235 Fissile  Nuclear Weapons  Nuclear Reactors 3 U238 Fertile  Neutron Irradiation of U238 Produces Pu239  Neutrons Come From U235 Fission  Pu239 is Fissile (Weapons, Reactors, etc.) Post World War II Legacy Background 3 "Enriched" Uranium Product  Weapons Program 

403

Colloquium: Artificial gauge potentials for neutral atoms  

SciTech Connect (OSTI)

When a neutral atom moves in a properly designed laser field, its center-of-mass motion may mimic the dynamics of a charged particle in a magnetic field, with the emergence of a Lorentz-like force. In this Colloquium the physical principles at the basis of this artificial (synthetic) magnetism are presented. The corresponding Aharonov-Bohm phase is related to the Berry's phase that emerges when the atom adiabatically follows one of the dressed states of the atom-laser interaction. Some manifestations of artificial magnetism for a cold quantum gas, in particular, in terms of vortex nucleation are discussed. The analysis is then generalized to the simulation of non-Abelian gauge potentials and some striking consequences are presented, such as the emergence of an effective spin-orbit coupling. Both the cases of bulk gases and discrete systems, where atoms are trapped in an optical lattice, are addressed.

Dalibard, Jean; Gerbier, Fabrice; Juzeliunas, Gediminas; Oehberg, Patrik [Laboratoire Kastler Brossel, CNRS, UPMC, Ecole normale superieure, 24 rue Lhomond, 75005, Paris (France); Institute of Theoretical Physics and Astronomy, Vilnius University, A. Gostauto 12, Vilnius 01108 (Lithuania); SUPA, Department of Physics, Heriot-Watt University, Edinburgh, EH14 4AS (United Kingdom)

2011-10-01T23:59:59.000Z

404

IGCC: Current Status and Future Potential  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Impact of Developing Technologies on the Impact of Developing Technologies on the Economics and Performance of Future IGCC Power Plants John Plunkett, Noblis David Gray, Noblis Charles White, Noblis Julianne Klara, NETL Copyright © 2008 Noblis, Inc. 2 Acknowledgement This work is sponsored by the U.S. Department of Energy, National Energy Technology Laboratory 3 Study Objective Starting with present-day baseline, evaluate improved IGCC performance and cost resulting from DOE-funded R&D over the next 18 years. Examine both with and without CO 2 capture. Study results will help to prioritize technology development based on relative impact. Results will also help to assess the impact of future potential CO 2 emissions restrictions. 4 Methodology * Use Aspen Plus simulator to provide model "transparency"

405

Self-potential observations during hydraulic fracturing  

SciTech Connect (OSTI)

The self-potential (SP) response during hydraulic fracturing of intact Sierra granite was investigated in the laboratory. Excellent correlation of pressure drop and SP suggests that the SP response is created primarily by electrokinetic coupling. For low pressures, the variation of SP with pressure drop is linear, indicating a constant coupling coefficient (Cc) of -200 mV/MPa. However for pressure drops >2 MPa, the magnitude of the Cc increases by 80% in an exponential trend. This increasing Cc is related to increasing permeability at high pore pressures caused by dilatancy of micro-cracks, and is explained by a decrease in the hydraulic tortuosity. Resistivity measurements reveal a decrease of 2% prior to hydraulic fracturing and a decrease of {approx}35% after fracturing. An asymmetric spatial SP response created by injectate diffusion into dilatant zones is observed prior to hydraulic fracturing, and in most cases this SP variation revealed the impending crack geometry seconds before failure. At rupture, injectate rushes into the new fracture area where the zeta potential is different than in the rock porosity, and an anomalous SP spike is observed. After fracturing, the spatial SP distribution reveals the direction of fracture propagation. Finally, during tensile cracking in a point load device with no water flow, a SP spike is observed that is caused by contact electrification. However, the time constant of this event is much less than that for transients observed during hydraulic fracturing, suggesting that SP created solely from material fracture does not contribute to the SP response during hydraulic fracturing.

Moore, Jeffrey R.; Glaser, Steven D.

2007-09-13T23:59:59.000Z

406

Potential wind power generation in South Egypt  

Science Journals Connector (OSTI)

Egypt is one of the developing countries. The production of electricity in Egypt is basically on petroleum, natural gas, hydro-power and wind energy. The objective of this work to prove the availability of sufficient wind potential in the wide area of deep south Egypt for the operation of wind turbines there. Nevertheless, it gives in general an approximate profile which is useful to the wind parks design for this area. The data used in the calculation are published and analyzed for the first time. The diagrams of the measured wind data for three meteorological stations over a period of two years (wind speed, frequency, direction), wind shear coefficient, the mean monthly and annual wind speed profile for every location are presented. Monthly Weibull parameters, standard deviation and coefficient of variation have been statistically discussed. A comparison of the rose diagrams shows that the wind speed is more persistent and blow over this region of Egypt in two main sectors N and NNW with long duration of frequencies from 67% to 87% over the year with an average wind speed in the range 6.8–7.9 m/s at the three stations. Evaluation of monthly wind energy density at 10 m height by two different methods was carried out. And the final diagram for every site shows no significant difference between them. The annual natural wind energies at 70 m A.G.L. lie between 333 and 377 W/m2 for Dakhla South and Kharga stations, respectively, which is similar to the inland wind potential of Vindeby (Denmark) and some European countries. These results indicate that Kharga and Dakhla South locations are new explored sites for future wind power generation projects.

Ahmed Shata Ahmed

2012-01-01T23:59:59.000Z

407

Definition: Self-Potential (SP) | Open Energy Information  

Open Energy Info (EERE)

Self-Potential (SP) Self-Potential (SP) (Redirected from Definition:Self Potential) Jump to: navigation, search Dictionary.png Self-Potential (SP) The self-potential (SP) technique is a passive electrical geophysical method based upon the measurement of spontaneous or natural electrical potential developed in the earth due to: 1) electrochemical interactions between minerals and subsurface fluids; 2) electrokinetic processes resulting from the flow of ionic fluids; or 3) thermoelectric mechanisms from temperature gradients in the subsurface.[1][2] View on Wikipedia Wikipedia Definition Spontaneous potential (SP), also called self potential, is a naturally occurring electric potential difference in the Earth, measured by an electrode relative to a fixed reference electrode. Spontaneous

408

Definition: Self-Potential (SP) | Open Energy Information  

Open Energy Info (EERE)

Self-Potential (SP) Self-Potential (SP) Jump to: navigation, search Dictionary.png Self-Potential (SP) The self-potential (SP) technique is a passive electrical geophysical method based upon the measurement of spontaneous or natural electrical potential developed in the earth due to: 1) electrochemical interactions between minerals and subsurface fluids; 2) electrokinetic processes resulting from the flow of ionic fluids; or 3) thermoelectric mechanisms from temperature gradients in the subsurface.[1][2] View on Wikipedia Wikipedia Definition Spontaneous potential (SP), also called self potential, is a naturally occurring electric potential difference in the Earth, measured by an electrode relative to a fixed reference electrode. Spontaneous potentials are often measured down boreholes for formation evaluation in

409

Extended-soft-core NN potentials in momentum space. I. Pseudoscalar-pseudoscalar exchange potentials  

Science Journals Connector (OSTI)

A momentum-space representation is derived for the Nijmegen extended-soft-core interactions. The partial wave projection of this representation is carried through, in principle for two-meson exchange in general. Explicit results for the momentum-space partial wave NN potentials from PS-PS exchange are given.

Th. A. Rijken; H. Polinder; J. Nagata

2002-10-29T23:59:59.000Z

410

Handling and Packaging a Potentially Radiologically Contaminated Patient |  

Broader source: Energy.gov (indexed) [DOE]

Handling and Packaging a Potentially Radiologically Contaminated Handling and Packaging a Potentially Radiologically Contaminated Patient Handling and Packaging a Potentially Radiologically Contaminated Patient The purpose of this procedure is to provide guidance to EMS care providers for properly handling and packaging potentially radiologically contaminated patients. This procedure applies to Emergency Medical Service care providers who respond to a radioactive material transportation incident that involves potentially contaminated injuries. Handling and Packaging a Potentially Radiologically Contaminated Patient.docx More Documents & Publications Pre-Hospital Practices for Handling a Radiologically Contaminated Patient Emergency Response to a Transportation Accident Involving Radioactive Material Radioactive Materials Transportation and Incident Response

411

The discrete potential Boussinesq equation and its multisoliton solutions  

E-Print Network [OSTI]

An alternate form of discrete potential Boussinesq equation is proposed and its multisoliton solutions are constructed. An ultradiscrete potential Boussinesq equation is also obtained from the discrete potential Boussinesq equation using the ultradiscretization technique. The detail of the multisoliton solutions is discussed by using the reduction technique. The lattice potential Boussinesq equation derived by Nijhoff et al. is also investigated by using the singularity confinement test. The relation between the proposed alternate discrete potential Boussinesq equation and the lattice potential Boussinesq equation by Nijhoff et al. is clarified.

Ken-ichi Maruno; Kenji Kajiwara

2009-08-12T23:59:59.000Z

412

A map for eccentric orbits in triaxial potentials  

E-Print Network [OSTI]

We construct a simple symplectic map to study the dynamics of eccentric orbits in non-spherical potentials. The map offers a dramatic improvement in speed over traditional integration methods, while accurately representing the qualitative details of the dynamics. We focus attention on planar, non-axisymmetric power-law potentials, in particular the logarithmic potential. We confirm the presence of resonant orbit families (``boxlets'') in this potential and uncover new dynamics such as the emergence of a stochastic web in nearly axisymmetric logarithmic potentials. The map can also be applied to triaxial, lopsided, non-power-law and rotating potentials.

J. Touma; S. Tremaine

1997-06-04T23:59:59.000Z

413

Gaseous fueled vehicles: A role for natural gas and hydrogen  

SciTech Connect (OSTI)

The commercialization of gaseous hydrogen fueled vehicles requires both the development of hydrogen fueled vehicles and the establishment of a hydrogen fueling infrastructure. These requirements create a classic chicken and egg scenario in that manufacturers will not build and consumers will not buy vehicles without an adequate refueling infrastructure and potential refueling station operators will not invest the needed capital without an adequate market to serve. One solution to this dilemma is to create a bridging strategy whereby hydrogen is introduced gradually via another carrier. The only contending alternative fuel that can act as a bridge to hydrogen fueled vehicles is natural gas. To explore this possibility, IGT is conducting emission tests on its dedicated natural gas vehicle (NGV) test platform to determine what, if any, effects small quantities of hydrogen have on emissions and performance. Furthermore, IGT is actively developing an adsorbent based low-pressure natural gas storage system for NGV applications. This system has also shown promise as a storage media for hydrogen. A discussion of our research results in this area will be presented. Finally, a review of IGT's testing facility will be presented to indicate our capabilities in conducted natural gas/hydrogen vehicle (NGHV) research. 3 refs., 10 figs.

Blazek, C.F.; Jasionowski, W.J.

1991-01-01T23:59:59.000Z

414

Next Generation Natural Gas Vehicle Activity: Natural Gas Engine and Vehicle Research & Development (Fact Sheet)  

SciTech Connect (OSTI)

This fact sheet describes the status of the Next Generation Natural Gas Vehicle (NGNGV) activity, including goals, R&D progress, NGV implementation, and the transition to hydrogen.

Not Available

2003-09-01T23:59:59.000Z

415

Alternative Fuels Data Center  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Idle Reduction and Natural Gas Vehicle (NGV) Weight Exemption Any motor vehicle equipped with an auxiliary power unit or other idle reduction technology may exceed the gross,...

416

Alternative Fuels Data Center  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Natural Gas Vehicle (NGV) Technician Certification Effective July 1, 2014, the Virginia Department of Professional and Occupational Regulation will administer a program to certify...

417

Alternative Fuels Data Center  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Natural Gas Vehicle (NGV) and Infrastructure Rebate - Oklahoma Natural Gas Oklahoma Natural Gas (ONG) offers rebates for NGVs purchased or converted on or after June 18, 2012, in...

418

Alternative Fuels Data Center  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Natural Gas Vehicle (NGV) and Infrastructure Initiative The West Virginia Natural Gas Vehicle Task Force was established to perform a cost-benefit analysis of NGVs; research and...

419

Alternative Fuels Data Center  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Natural Gas Vehicle (NGV) Grants The Pennsylvania Department of Environmental Protection administers the Natural Gas Vehicle Grant Program, which provides funding to eligible...

420

Alternative Fuels Data Center  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Natural Gas Vehicle (NGV) Acquisition Requirements The Wyoming Department of Administration and Information, University of Wyoming, community colleges, and state agencies must...

Note: This page contains sample records for the topic "hd ngv potential" 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

Alternative Fuels Data Center  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

of a qualified Phill NGV home fueling appliance. SCAQMD and the Mobile Source Air Pollution Reduction Review Committee provide funding for the program, which will...

422

1996 Residential Lighting Use and Potential Savings  

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

Administration Home Page Welcome to the Energy Information Administration's Residential Energy Consumption Home Page. If you need assistance in viewing this page, please call (202) 586-8800 Energy Information Administration Home Page Administration Home Page Welcome to the Energy Information Administration's Residential Energy Consumption Home Page. If you need assistance in viewing this page, please call (202) 586-8800 Energy Information Administration Home Page Home > Energy Users > Residential Home >1996 Lighting DOE/EIA-0555(96)/2 Distribution Category UC-950 Energy Consumption Series Residential Lighting Use and Potential Savings September 1996 Energy Information Administration Office of Energy Markets and End Use U.S. Department of Energy Washington, DC 20585 Contacts This publication was prepared by the Energy Information Administration (EIA) under the general direction of W. Calvin Kilgore, Director of the Office of Energy Markets and End Use (202-586-1617). The project was directed by Lynda T. Carlson, Director of the Office of Energy End Use and Integrated Statistics Division (EEUISD) (202-586-1112). Specific technical information may be obtained from the Residential Energy Consumption Survey (RECS) Manager, Robert Latta (202-586-1385). The FAX number for all EEUISD personnel is 202-586-0018.

423

Woody biomass energy potential in 2050  

Science Journals Connector (OSTI)

Abstract From a biophysical perspective, woody biomass resources are large enough to cover a substantial share of the world's primary energy consumption in 2050. However, these resources have alternative uses and their accessibility is limited, which tends to decrease their competitiveness with respect to other forms of energy. Hence, the key question of woody biomass use for energy is not the amount of resources, but rather their price. In this study we consider the question from the perspective of energy wood supply curves, which display the available amount of woody biomass for large-scale energy production at various hypothetical energy wood prices. These curves are estimated by the Global Biosphere Management Model (GLOBIOM), which is a global partial equilibrium model of forest and agricultural sectors. The global energy wood supply is estimated to be 0–23 Gm3/year (0–165 EJ/year) when energy wood prices vary in a range of 0–30$/GJ (0–216$/m3). If we add household fuelwood to energy wood, then woody biomass could satisfy 2–18% of world primary energy consumption in 2050. If primary forests are excluded from wood supply then the potential decreases up to 25%.

Pekka Lauri; Petr Havlík; Georg Kindermann; Nicklas Forsell; Hannes Böttcher; Michael Obersteiner

2014-01-01T23:59:59.000Z

424

Current-potential characteristics of electrochemical systems  

SciTech Connect (OSTI)

This dissertation contains investigations in three distinct areas. Chapters 1 and 2 provide an analysis of the effects of electromagnetic phenomena during the initial stages of cell discharge. Chapter 1 includes the solution to Maxwell`s equations for the penetration of the axial component of an electric field into an infinitely long cylindrical conductor. Chapter 2 contains the analysis of the conductor included in a radial circuit. Chapter 3 provides a complete description of the equations that describe the growth of an oxide film. A finite difference program was written to solve the equations. The system investigated is the iron/iron oxide in a basic, aqueous solution. Chapters 4 and 5 include the experimental attempts for replacing formaldehyde with an innocuous reducing agent for electroless deposition. In chapter 4, current-versus-voltage curves are provided for a sodium thiosulfate bath in the presence of a copper disk electrode. Also provided are the cathodic polarization curves of a copper/EDTA bath in the presence of a copper electrode. Chapter 5 contains the experimental results of work done with sodium hypophosphite as a reducing agent. Mixed-potential-versus-time curves for solutions containing various combinations of copper sulfate, nickel chloride, and hypophosphite in the presence of a palladium disk electrode provide an indication of the reducing power of the solutions.

Battaglia, V.S.

1993-07-01T23:59:59.000Z

425

A Laboratory Method of Producing High Potentials  

Science Journals Connector (OSTI)

Details are given of the experimental arrangement by which, using Tesla coils in oil, very high potentials have been produced and measured. Excited at the rate of 120 sparks per second Tesla coils have been operated at 3,000,000 volts in ordinary transformer oil at atmospheric pressure. In oil under a pressure of 500 pounds per square inch, voltages as high as 5,200,000 have been produced with intermittent excitation. These voltages (peak values) are measured by a simple capacity-potentiometer, in which an insulated electrode "picks up" a known fraction of the total voltage, this fractional voltage being measured by means of a sphere gap. Measurements are given of the voltage-distribution along Tesla coils. Calculations and measurements of the efficiency and power-output of such coils show that at 120 sparks per second, a coil operating at 5,000,000 volts provides sufficient power, if used to accelerate helium nuclei in a suitable vacuum-tube, to yield the equivalent of about 2,600 grams of radium.

G. Breit; M. A. Tuve; O. Dahl

1930-01-01T23:59:59.000Z

426

Potential of Securitization in Solar PV Finance  

SciTech Connect (OSTI)

This report aims to demonstrate, hypothetically and at a high level, what volumes of solar deployment could be supported given solar industry access to the capital markets in the form of security issuance. Securitization is not anticipated to replace tax equity in the near- to mid-term, but it could provide an additional source of funds that would be comparatively inexpensive and could reduce the weighted average cost of capital for a given solar project or portfolio. Thus, the potential to securitize solar assets and seek financing in the capital markets could help to sustain the solar industry when the investment tax credit (ITC) -- one of the federal incentives that has leveraged billions of dollars of private capital in the solar industry -- drops from 30% to 10% at the close of 2016. The report offers analysis on the size of the U.S. third-party financed solar market, as well as on the volumes (in MW) of solar asset origination possible through a $100 million securitization fund (assuming no overcollateralization). It also provides data on the size of the relevant securities markets and how the solar asset class may fit into these markets.

Lowder, T.; Mendelsohn, M.

2013-12-01T23:59:59.000Z

427

POTENTIAL THERMOELECTRIC APPLICATIONS IN DIESEL VEHICLES  

SciTech Connect (OSTI)

Novel thermodynamic cycles developed by BSST provide improvements by factors of approximately 2 in cooling, heating and power generation efficiency of solid-state thermoelectric systems. The currently available BSST technology is being evaluated in automotive development programs for important new applications. Thermoelectric materials are likely to become available that further increase performance by a comparable factor. These major advancements should allow the use of thermoelectric systems in new applications that have the prospect of contributing to emissions reduction, fuel economy, and improved user comfort. Potential applications of thermoelectrics in diesel vehicles are identified and discussed. As a case in point, the history and status of the Climate Controlled Seat (CCS) system from Amerigon, the parent of BSST, is presented. CCS is the most successful and highest production volume thermoelectric system in vehicles today. As a second example, the results of recent analyses on electric power generation from vehicle waste heat are discussed. Conclusions are drawn as to the practicality of waste power generation systems that incorporate BSST's thermodynamic cycle and advanced thermoelectric materials.

Crane, D

2003-08-24T23:59:59.000Z

428

Anthropogenic sounds ? Potential effects on fish  

Science Journals Connector (OSTI)

There is concern that human?generated sounds may have deleterious effects on fish. This paper will review some of what is currently known about these effects and consider the questions that have to be answered before developing models to enable "prediction" of sound effects on particular fish species. A major restriction is that there are few peer?reviewed data on effects of anthropogenic sources on fish. Extrapolation from these results is further confounded since experiments differ in many ways each of which may alter the resultant impact on fish. For example studies vary in sounds types tested (e.g. pile driving vs. ship noise) signal parameters (intensity number of repetitions) species used fish age etc. Moreover a singularly important issue is that while many of the issues and impact mechanisms are potentially amenable to experimental lab study the ultimate questions regarding the effects of sound on fish behavior need to field based and require long?term observations where behaviour of wild fish is not constrained. Only by observing fish in the wild will we ultimately understand if and how anthropogenic sounds impact fish both during exposure and more importantly for extended periods after the termination of the sound.

Arthur Popper; Svein Lo/kkeborg; Robert McCauley

2008-01-01T23:59:59.000Z

429

Pseudomonas aeruginosa biofilm: Potential therapeutic targets  

Science Journals Connector (OSTI)

Abstract Pseudomonas aeruginosa is a gram-negative pathogen that has become an important cause of infection, especially in patients with compromised host defense mechanisms. It is frequently related to nosocomial infections such as pneumonia, urinary tract infections (UTIs) and bacteremia. The biofilm formed by the bacteria allows it to adhere to any surface, living or non-living and thus Pseudomonal infections can involve any part of the body. Further, the adaptive and genetic changes of the micro-organisms within the biofilm make them resistant to all known antimicrobial agents making the Pseudomonal infections complicated and life threatening. Pel, Psl and Alg operons present in P. aeruginosa are responsible for the biosynthesis of extracellular polysaccharide which plays an important role in cell–cell and cell–surface interactions during biofilm formation. Understanding the bacterial virulence which depends on a large number of cell-associated and extracellular factors is essential to know the potential drug targets for future studies. Current novel methods like small molecule based inhibitors, phytochemicals, bacteriophage therapy, photodynamic therapy, antimicrobial peptides, monoclonal antibodies and nanoparticles to curtail the biofilm formed by P. aeruginosa are being discussed in this review.

Garima Sharma; Saloni Rao; Ankiti Bansal; Shweta Dang; Sanjay Gupta; Reema Gabrani

2014-01-01T23:59:59.000Z

430

Potentiality and Contradiction in Quantum Mechanics  

E-Print Network [OSTI]

Following J.-Y.B\\'eziau in his pioneer work on non-standard interpretations of the traditional square of opposition, we have applied the abstract structure of the square to study the relation of opposition between states in superposition in orthodox quantum mechanics in \\cite{are14}. Our conclusion was that such states are \\ita{contraries} (\\ita{i.e.} both can be false, but both cannot be true), contradicting previous analyzes that have led to different results, such as those claiming that those states represent \\ita{contradictory} properties (\\ita{i. e.} they must have opposite truth values). In this chapter we bring the issue once again into the center of the stage, but now discussing the metaphysical presuppositions which underlie each kind of analysis and which lead to each kind of result, discussing in particular the idea that superpositions represent potential contradictions. We shall argue that the analysis according to which states in superposition are contrary rather than contradictory is still more plausible.

Jonas R. B. Arenhart; Décio Krause

2014-06-07T23:59:59.000Z

431

Potential of Concentrating Solar Power in Canada  

Science Journals Connector (OSTI)

Abstract In this paper, results of an analysis to assess the potential of concentrating solar thermal power applications in Canada are presented. First, a direct normal solar resource (DNI) resource map for Canada is introduced. This map indicates the locations where the DNI is the highest in Canada and is derived from the most recent Perez's SUNY satellite-based solar resource model Version number 3. Second, the methodology and results of a GIS analysis to identify the locations of the most suitable lands for concentrating solar thermal power (CSP) applications in Canada are discussed. The total areas of the CSP-suitable lands are presented in a tabulated and a map formats for each of the Canadian provinces where there is a maximum DNI solar resource. Third and finally, results of a technical economical analysis for two CSP system designs are discussed. The two CSP systems considered include parabolic trough with synthetic oil heat transfer fluid with and without storage, molten salt power tower with and without storage.

R. Djebbar; D. Belanger; D. Boutin; E. Weterings; M. Poirier

2014-01-01T23:59:59.000Z

432

Renormalization of the Brazilian chiral nucleon-nucleon potential  

SciTech Connect (OSTI)

In this work we present a renormalization of the Brazilian nucleon-nucleon (NN) potential using a subtractive method. We show that the exchange of correlated two pion is important for isovector channels, mainly in tensor and central potentials.

Da Rocha, Carlos A. [Universidade Sao Judas Tadeu, Rua Taquari, 546 - 03166-000 - Sao Paulo - SP (Brazil); Timoteo, Varese S. [Faculdade de Tecnologia, Universidade Estadual de Campinas, 13484-332 Limeira, SP (Brazil)

2013-03-25T23:59:59.000Z

433

Global Potential of Energy Efficiency Standards and Labeling Programs  

E-Print Network [OSTI]

report estimates the global potential reductions in greenhouse gas emissions by 2030 for energy efficiencyreport estimates the global potential reductions in greenhouse gas emissions by 2030 for energy efficiency

McNeil, Michael A

2008-01-01T23:59:59.000Z

434

Reception of longitudinal vector potential radiation with a plasma antenna  

SciTech Connect (OSTI)

To help resolve the long-running debate between physicists and engineers regarding the existence of the magnetic vector potential, herewith we describe an experiment demonstrating reception of time-harmonic vector potential radiation at 1.3 GHz.

Zimmerman, Robert K. Jr. [Sigma Space Corporation, NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, Maryland 20771 (United States)] [Sigma Space Corporation, NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, Maryland 20771 (United States)

2013-07-28T23:59:59.000Z

435

Modeling and inversion of self-potential data  

E-Print Network [OSTI]

This dissertation presents data processing techniques relevant to the acquisition, modeling, and inversion of self-potential data. The primary goal is to facilitate the interpretation of self-potentials in terms of the ...

Minsley, Burke J

2007-01-01T23:59:59.000Z

436

Development of the Potential Energy Savings Estimation (PESE) Toolkit  

E-Print Network [OSTI]

This study has developed a prototype computer tool called the Potential Energy Savings Estimation (PESE) Toolkit. Baltazar’s methodology for potential energy savings estimation from EBCx/retrofit measures has been improved in several ways...

Liu, J.; Baltazar, J. C.; Claridge, D. E.

437

Progress in calculating the potential energy surface of H3+  

Science Journals Connector (OSTI)

...of the ground state potential energy surface of H . J. Chem. Phys...and computations of transition energies in rotationally cold triatomic...G. Csaszar Calibration-quality adiabatic potential energy surfaces for H and its isotopologues...

2012-01-01T23:59:59.000Z

438

Turbulence Patch Identification in Potential Density or Temperature Profiles  

Science Journals Connector (OSTI)

The Thorpe analysis is a recognized method used to identify and characterize turbulent regions within stably stratified fluids. By comparing an observed profile of potential temperature or potential density to a reference profile obtained by ...

Richard Wilson; Hubert Luce; Francis Dalaudier; Jacques Lefrère

2010-06-01T23:59:59.000Z

439

Mapping the Potential of U.S. Ocean Energy  

Office of Energy Efficiency and Renewable Energy (EERE)

EERE's resource assessments show the scope of potential wave, tidal, and current energy development off of U.S. coasts, a technical potential of more than 2,000 TWh per year of clean, renewable electricity.

440

Potential Vorticity Modeling of the ITCZ and the Hadley Circulation  

Science Journals Connector (OSTI)

A simple zonally symmetric balanced model of the Hadley circulation is presented. The model is based on potential vorticity arguments and consists of a predictive equation for the potential pseudodensity and an invertibility principle to diagnose ...

Wayne H. Schubert; Paul E. Ciesielski; Duane E. Stevens; Hung-Chi Kuo

1991-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "hd ngv potential" 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

Fitting Multidimensional Global Potential Energy Surfaces with Neural Networks  

E-Print Network [OSTI]

, Albuquerque, New Mexico, 87131, USA Potential energy surfaces Mexico. Our method enforces the nuclear permutation symmetry by introducing multiple symmetry Fitting Multidimensional Global Potential Energy Surfaces with Neural Networks Bin Jiang

Maccabe, Barney

442

EM Eliminates Potential Safety Hazard at SRS | Department of...  

Broader source: Energy.gov (indexed) [DOE]

Potential Safety Hazard at SRS EM Eliminates Potential Safety Hazard at SRS September 30, 2014 - 12:00pm Addthis Shown here is H-Canyon, where workers recently dissolved the last...

443

Quantifying National Energy Savings Potential of Lighting Controls in  

E-Print Network [OSTI]

Quantifying National Energy Savings Potential of Lighting Controls in Commercial Buildings Alison of sound energy policy with respect to lighting controls depends on improved quantification of potential savings. Researchers have been quantifying energy savings from lighting controls in commercial buildings

444

An ab initio method for locating potential energy minima  

SciTech Connect (OSTI)

We study the potential energy landscape underlying the motion of monatomic liquids by quenching from random initial configurations (stochastic configurations) to the nearest local minimum of the potential energy. We show that this procedure reveals the underlying potential energy surface directly. This is in contrast to the common technique of quenching from a molecular dynamics trajectory which does not allow a direct view of the underlying potential energy surface, but needs to be corrected for thermodynamic weighting factors.

Bock, Nicolas [Los Alamos National Laboratory; Peery, Travis [Los Alamos National Laboratory; Venneri, Giulia [Los Alamos National Laboratory; Chisolm, Eric [Los Alamos National Laboratory; Wallace, Duane [Los Alamos National Laboratory; Lizarraga, Raquel [CHILE; Holmstrom, Erik [CHILE

2009-01-01T23:59:59.000Z

445

Potential Flow Calculations of Axisymmetric Ducted Wind Turbines  

E-Print Network [OSTI]

An incompressible potential-flow vortex method has been constructed to analyze the flow field of a ducted

Widnall, Sheila

2009-09-02T23:59:59.000Z

446

The determination of potential acidity in overburden sediments  

E-Print Network [OSTI]

Weathered Overburden Samples. Determination of Total Sulfur by LECO. Determination of Non-Sulfate Sulfur by LECO. Pyritic Iron Using the ASTM Method Potential Acidity Using a Rapid Oxidation Technique - Original Method. Potential Acidity Using a Rapid... the Sample. The Addition of Excess H 02. Catalysing the Decomposition of Excess H202. Leaching the Oxidized Sample with CaC12. Comparison of Potential Acidity Methods. F and T Tests. Potential Acidity of Weathered vs. Unweathered Samples. Total S...

O'Shay, Tracey Ann

2012-06-07T23:59:59.000Z

447

CHP Market Potential in the Western States, September 2005  

Broader source: Energy.gov [DOE]

Outlook for CHP in each state based on base case cumulative market penetration to the technical market potential calculated

448

Potential Flow Modelling for Wind Turbines Shane Cline  

E-Print Network [OSTI]

Potential Flow Modelling for Wind Turbines by Shane Cline B.Sc., University of Toledo, 2003 M means, without the permission of the author. #12;ii Potential Flow Modelling for Wind Turbines by Shane potential flow methods are a promising alternative to mainstream wind turbine aerodynamics tools

Victoria, University of

449

Resuspension potential of surficial sediments in Saguenay Fjord (Quebec, Canada)  

E-Print Network [OSTI]

Resuspension potential of surficial sediments in Saguenay Fjord (Que´bec, Canada) Ann-Laure Moreau Fjord. Because this turbidite covered contaminated sediments, the resuspension potential of surficial. The resuspension potential of surficial sediments in Saguenay Fjord was investigated in situ over a 3- yr period

Long, Bernard

450

ISSN 1745-9648 Potential Impact of Electricity Reforms on  

E-Print Network [OSTI]

ISSN 1745-9648 Potential Impact of Electricity Reforms on Turkish Households by Necmiddin Finance, Hacettepe University & Catherine Waddams Price ESRC Centre for Competition Policy and Norwich the potential effect of electricity reform on different households, using a series of potential scenarios

Feigon, Brooke

451

Biomass Potentials from California Forest and Shrublands Including Fuel  

E-Print Network [OSTI]

Biomass Potentials from California Forest and Shrublands Including Fuel Reduction Potentials-04-004 February 2005 Revised: October 2005 Arnold Schwarzenegger, Governor, State of California #12;Biomass Tiangco, CEC Bryan M. Jenkins, University of California #12;Biomass Potentials from California Forest

452

A modified LandauDevonshire thermodynamic potential for strontium titanate  

E-Print Network [OSTI]

A modified Landau­Devonshire thermodynamic potential for strontium titanate G. Sheng, Y. L. Li, J Landau­Devonshire thermodynamic potential for strontium titanate G. Sheng,1,a Y. L. Li,2 J. X. Zhang,1,b of the Landau energy coefficients and report a modified thermodynamic potential for bulk strontium titanate

Chen, Long-Qing

453

Remarks on quark-quark and quark-antiquark potentials  

Science Journals Connector (OSTI)

The quark-quark potential in antisymmetrical color states and the quark-antiquark potential in color-singlet states are given to the fourth order in perturbative quantum chromodynamics. We have also corrected an error involving the charge conjugation of color matrices in our recent derivation of the quark-antiquark potential for arbitrary color states.

Suraj N. Gupta and Stanley F. Radford

1982-06-15T23:59:59.000Z

454

Elec 331 -Bio-Potential Electrodes Review Definitions  

E-Print Network [OSTI]

voltages ­ Ohmic (Vr) · Resistance of surface layer · Resistance of electrolyte ­ Concentration (Vc) · Ion V I V I #12;Elec 331 - Bio-Potential Electrodes 5 Equivalent Circuit · Vhc = half-cell potential · Vop = over-potential · CJ = junction capacitance · RJ = junction resistance · RE = electrolyte

Pulfrey, David L.

455

Assessing Carbon Dynamics in Semiarid Ecosystems: Balancing Potential Gains with Potential Large Rapid Losses  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Assessing Carbon Dynamics in Semiarid Ecosystems: Assessing Carbon Dynamics in Semiarid Ecosystems: Balancing Potential Gains With Potential Large Rapid Losses David D. Breshears (daveb@lanl.gov; 505-665-2803) Environmental Dynamics and Spatial Analysis Group (EES-10), Mail Stop J495 Earth and Environmental Sciences Division Los Alamos National Laboratory Los Alamos, NM 87545 Michael H. Ebinger (mhe@lanl.gov, 505-667-4417) Environmental Dynamics and Spatial Analysis Group (EES-10), Mail Stop J495 Earth and Environmental Sciences Division Los Alamos National Laboratory Los Alamos, NM 87545 Pat J. Unkefer (punkefer@lanl.gov, 505-665-2803) Biosciences Division, BS-1 Los Alamos National Laboratory Los Alamos, NM 87545 Craig D. Allen (craig_allen@usgs.gov, 505-672-3861, Ext. 541) U. S. Geological Survey, Midcontinent Ecological Science Center

456

FEL potential of eRHIC  

SciTech Connect (OSTI)

Brookhaven National Laboratory plans to build a 5-to-30 GeV energy-recovery linac (ERL) for its future electron-ion collider, eRHIC. In past few months, the Laboratory turned its attention to the potential of this unique machine for free electron lasers (FELS), which we initially assessed earlier. In this paper, we present our current vision of a possible FEL farm, and of narrow-band FEL-oscillators driven by this accelerator. eRHIC, the proposed electron-ion collider at BNL, takes advantage of the existing Relativistic Heavy Ion Collider (RHIC) complex. Plans call for adding a six-pass super-conducting (SRF) ERL to this complex to collide polarized- and unpolarized- electron beams with heavy ions (with energies up to 130 GeV per nucleon) and with polarized protons (with energies up to 325 GeV). RHIC, with a circumference of 3.834 km, has three-fold symmetry and six straight sections each {approx} 250 m long. Two of these straight sections will accommodate 703-MHz SRF linacs. The maximum energy of the electron beam in eRHIC will be reached in stages, from 5 GeV to 30 GeV, by increasing the lengths of its SRF linacs. We plan to install at the start the six-pass magnetic system with small gap magnets. The structure of the eRHIC's electron beam will be identical with that of its hadron beam, viz., 166 bunches will be filled, reserving about a one-microsecond gap for the abort kicker. With modest modifications, we can assure that eRHIC's ERL will become an excellent driver for continuous wave (CW) FELs (see Fig.1). The eRHIC's beam structure will support the operation of several such FELs in parasitic mode.

Litvinenko, V.N.; Ben-Zvi, I.; Hao, Y.; Kao, C-C.; Kayran, D.; Murphy, J.B.; Ptitsyn, V.; Trbojevic, D.; Tsoupas, N.

2010-08-23T23:59:59.000Z

457

Identifying Project Potential and Options Webinar | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Identifying Project Potential and Options Webinar Identifying Project Potential and Options Webinar Identifying Project Potential and Options Webinar April 30, 2014 11:00AM MDT Attendees will understand the components of identifying energy project potential and options. Presenters will discuss market considerations, initial site considerations, project savings or rate-of-return estimates, production potential, final site selection, tribal options, finance, partnerships, and participation processes. Attendees will also become familiar with data gathering and analysis procedures such as tribal facility electric cost data, regulations, and interconnection requirements; paths to market for project power; and renewable sales, risks; and utility rules. By following the steps outlined in the webinar, Tribes can determine

458

Photovoltaic Potential and Insolation Maps (Canada) | Open Energy  

Open Energy Info (EERE)

Photovoltaic Potential and Insolation Maps (Canada) Photovoltaic Potential and Insolation Maps (Canada) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Photovoltaic Potential and Insolation Maps (Canada) Focus Area: Renewable Energy Topics: Potentials & Scenarios Website: glfc.cfsnet.nfis.org/mapserver/pv/pvmapper.phtml?LAYERS=2700,2701,2057 Equivalent URI: cleanenergysolutions.org/content/photovoltaic-potential-and-insolation Language: English Policies: Regulations Regulations: Net Metering & Interconnection These interactive maps give estimates of the electricity that can be generated by grid-connected photovoltaic (PV) arrays without batteries and of the mean daily global insolation for any location in Canada. Insolation data was provided by the Data Analysis and Archive Division, Meteorological

459

IEA Renewables in Southeast Asian Countries: Trends and Potentials | Open  

Open Energy Info (EERE)

Southeast Asian Countries: Trends and Potentials Southeast Asian Countries: Trends and Potentials Jump to: navigation, search Name IEA Renewables in Southeast Asian Countries: Trends and Potentials Agency/Company /Organization International Energy Agency Sector Energy Focus Area Renewable Energy, Biomass, Transportation Topics Market analysis, Policies/deployment programs Resource Type Publications Website http://www.iea.org/papers/2010 Country Indonesia, Thailand, Philippines, Vietnam, Singapore, Malaysia, Brunei, Cambodia, Laos, Myanmar UN Region South-Eastern Asia References IEA Renewables in Southeast Asian Countries: Trends and Potentials[1] "A main focus of the report investigates the potentials and barriers for scaling up market penetration of renewable energy technologies (RETs) in

460

Mexico - Greenhouse Gas Emissions Baselines and Reduction Potentials from  

Open Energy Info (EERE)

Greenhouse Gas Emissions Baselines and Reduction Potentials from Greenhouse Gas Emissions Baselines and Reduction Potentials from Buildings Jump to: navigation, search Name Mexico - Greenhouse Gas Emissions Baselines and Reduction Potentials from Buildings Agency/Company /Organization United Nations Environment Programme Sector Energy Focus Area Buildings Topics Baseline projection, GHG inventory, Pathways analysis, Background analysis Resource Type Publications Website http://www.unep.org/sbci/pdfs/ Country Mexico Central America References Greenhouse Emissions Baselines and Reduction Potentials for Buildings[1] Mexico - Greenhouse Gas Emissions Baselines and Reduction Potentials from Buildings Screenshot "This report represents the first comprehensive description of the factors that determine the present and future impacts of residential and commercial

Note: This page contains sample records for the topic "hd ngv potential" 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

Building Technologies Office: Low-Global Warming Potential Refrigerants  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Low-Global Warming Low-Global Warming Potential Refrigerants Research Project to someone by E-mail Share Building Technologies Office: Low-Global Warming Potential Refrigerants Research Project on Facebook Tweet about Building Technologies Office: Low-Global Warming Potential Refrigerants Research Project on Twitter Bookmark Building Technologies Office: Low-Global Warming Potential Refrigerants Research Project on Google Bookmark Building Technologies Office: Low-Global Warming Potential Refrigerants Research Project on Delicious Rank Building Technologies Office: Low-Global Warming Potential Refrigerants Research Project on Digg Find More places to share Building Technologies Office: Low-Global Warming Potential Refrigerants Research Project on AddThis.com... About Take Action to Save Energy

462

National and Sectoral GHG Mitigation Potential: A Comparison Across Models  

Open Energy Info (EERE)

National and Sectoral GHG Mitigation Potential: A Comparison Across Models National and Sectoral GHG Mitigation Potential: A Comparison Across Models Jump to: navigation, search Tool Summary Name: National and Sectoral GHG Mitigation Potential: A Comparison Across Models Agency/Company /Organization: Organisation for Economic Co-Operation and Development Topics: GHG inventory, Policies/deployment programs, Pathways analysis Resource Type: Software/modeling tools, Publications, Lessons learned/best practices Website: www.iea.org/papers/2009/Mitigation_potentials.pdf References: National and Sectoral GHG Mitigation Potential: A Comparison Across Models[1] Summary "This paper focuses on mitigation potential to provide a comparative assessment across key economies. GHG mitigation potential is defined here to be the level of GHG emission reductions that could be realised, relative

463

Quantification of the Potential Impact on Commercial Markets of DOE's  

Broader source: Energy.gov (indexed) [DOE]

Quantification of the Potential Impact on Commercial Markets of Quantification of the Potential Impact on Commercial Markets of DOE's Transfer of Natural Uranium Hexaflouride During Calendar Years 2011, 2012 and 2013 Quantification of the Potential Impact on Commercial Markets of DOE's Transfer of Natural Uranium Hexaflouride During Calendar Years 2011, 2012 and 2013 A stuy of the potential impact of commerical markets of the Department of Energy's authoriziaton of uranium transfers to fund accelerated cleanup activities at the Portsmouth Site in Piketon, Ohio ERI_2142_07_1001_DOE_Potential_Market_Impact_Dec2010.pdf More Documents & Publications Quantification of the Potential Impact on Commercial Markets of DOE's Transfer of Natural Uranium Hexaflouride During Calendar Years 2011, 2012, and 2013 Quantification of the Potential Impact on Commercial Markets of

464

Federal Energy Management Program: Assess Potential Agency Size Changes  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Assess Potential Assess Potential Agency Size Changes that Impact Greenhouse Gas Emissions to someone by E-mail Share Federal Energy Management Program: Assess Potential Agency Size Changes that Impact Greenhouse Gas Emissions on Facebook Tweet about Federal Energy Management Program: Assess Potential Agency Size Changes that Impact Greenhouse Gas Emissions on Twitter Bookmark Federal Energy Management Program: Assess Potential Agency Size Changes that Impact Greenhouse Gas Emissions on Google Bookmark Federal Energy Management Program: Assess Potential Agency Size Changes that Impact Greenhouse Gas Emissions on Delicious Rank Federal Energy Management Program: Assess Potential Agency Size Changes that Impact Greenhouse Gas Emissions on Digg Find More places to share Federal Energy Management Program: Assess

465

Vehicle Technologies Office: Fact #122: April 3, 2000 Potential Fuel  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

2: April 3, 2000 2: April 3, 2000 Potential Fuel Savings of Doubling Fuel Economy to someone by E-mail Share Vehicle Technologies Office: Fact #122: April 3, 2000 Potential Fuel Savings of Doubling Fuel Economy on Facebook Tweet about Vehicle Technologies Office: Fact #122: April 3, 2000 Potential Fuel Savings of Doubling Fuel Economy on Twitter Bookmark Vehicle Technologies Office: Fact #122: April 3, 2000 Potential Fuel Savings of Doubling Fuel Economy on Google Bookmark Vehicle Technologies Office: Fact #122: April 3, 2000 Potential Fuel Savings of Doubling Fuel Economy on Delicious Rank Vehicle Technologies Office: Fact #122: April 3, 2000 Potential Fuel Savings of Doubling Fuel Economy on Digg Find More places to share Vehicle Technologies Office: Fact #122: April 3, 2000 Potential Fuel Savings of Doubling Fuel Economy on

466

Definition: Renewable Energy Technical Potential | Open Energy Information  

Open Energy Info (EERE)

Renewable Energy Technical Potential Renewable Energy Technical Potential Jump to: navigation, search Dictionary.png Renewable Energy Technical Potential Renewable energy technical potential represents the achievable energy generation of a particular technology given system performance, topographic limitations, environmental, and land-use constraints.[1] Also Known As RE Tech Potential,Tech Potential Related Terms energy References ↑ NREL GIS Ret LikeLike UnlikeLike You like this.Sign Up to see what your friends like. rieved from "http://en.openei.org/w/index.php?title=Definition:Renewable_Energy_Technical_Potential&oldid=493056" Category: Definitions What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load)

467

Quantification of the Potential Impact on Commercial Markets of DOE's  

Broader source: Energy.gov (indexed) [DOE]

Quantification of the Potential Impact on Commercial Markets of Quantification of the Potential Impact on Commercial Markets of DOE's Transfer of Natural Uranium Hexaflouride During Calendar Years 2011, 2012, and 2013 Quantification of the Potential Impact on Commercial Markets of DOE's Transfer of Natural Uranium Hexaflouride During Calendar Years 2011, 2012, and 2013 Quantification of the Potential Impact on Commercial Markets of DOE's Transfer of Natural Uranium Hexaflouride During Calendar Years 2011, 2012, and 2013 4.6_ERI_2142_07_1001_DOE_Potential_Market_Impact_Dec2010.pdf More Documents & Publications Quantification of the Potential Impact on Commercial Markets of DOE's Transfer of Natural Uranium Hexaflouride During Calendar Years 2011, 2012 and 2013 Quantification of the Potential Impact on Commercial Markets of

468

A randomized comparative effectiveness study of Healthy Directions 2—A multiple risk behavior intervention for primary care  

Science Journals Connector (OSTI)

AbstractObjective To evaluate the effectiveness of the Healthy Directions 2 (HD2) intervention in the primary care setting. Methods HD2 was a cluster randomized trial (conducted 3/09–11/11). The primary sampling unit was provider (n = 33), with secondary sampling of patients within provider (n = 2440). Study arms included: 1) usual care (UC); 2) HD2—a patient self-guided intervention targeting 5 risk behaviors; and 3) HD2 plus 2 brief telephone coaching calls (HD2 + CC). The outcome measure was the proportion of participants with a lower multiple risk behavior (MRB) score by follow-up. Results At baseline, only 4% of the participants met all behavioral recommendations. Both HD2 and HD2 + CC led to improvements in MRB score, relative to UC, with no differences between the two HD2 conditions. Twenty-eight percent of the UC participants had improved MRB scores at 6 months, vs. 39% and 43% in HD2 and HD2 + CC, respectively (ps ? .001); results were similar at 18 months (p ? .05). The incremental cost of one risk factor reduction in MRB score was $310 for HD2 and $450 for HD2 + CC. Conclusions Self-guided and coached intervention conditions had equivalent levels of effect in reducing multiple chronic disease risk factors, were relatively low cost, and thus are potentially useful for routine implementation in similar health settings.

Karen M. Emmons; Elaine Puleo; Mary L. Greaney; Matthew W. Gillman; Gary G. Bennett; Jess Haines; Kim Sprunck-Harrild; K. Viswanath

2014-01-01T23:59:59.000Z

469

Design & Development of e-TurboTM for SUV and Light Truck Applications...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

& Publications Design and Development of e-Turbo for SUV and Light Truck Applications The Potential of Elelcltric Exhaust Gas Turbocharging for HD DIesel Engines SuperTurbocharger...

470

Notice of Study Availability - Potential Benefits of Distributed Generation  

Broader source: Energy.gov (indexed) [DOE]

Study Availability - Potential Benefits of Distributed Study Availability - Potential Benefits of Distributed Generation and Rate-Related Issues That May Impede Their Expansion: Federal Register Notice Volume 72, No. 40 - Mar. 1, 2007 Notice of Study Availability - Potential Benefits of Distributed Generation and Rate-Related Issues That May Impede Their Expansion: Federal Register Notice Volume 72, No. 40 - Mar. 1, 2007 Federal Register Notice of availability of a study of the potential benefits of distributed generation and rate-related issues that may impede their expansion, and request for public comment. Study of the Potential Benefits of Distributed Generation and Rate- Related Issues That May Impede Their Expansion More Documents & Publications Notice of inquiry and request for Information - Study of the potential

471

DOE-Evaluating A Potential Microhydro Site | Open Energy Information  

Open Energy Info (EERE)

DOE-Evaluating A Potential Microhydro Site DOE-Evaluating A Potential Microhydro Site Jump to: navigation, search Tool Summary LAUNCH TOOL Name: DOE-Evaluating A Potential Microhydro Site Agency/Company /Organization: United States Department of Energy Sector: Energy Focus Area: Renewable Energy, Water Power Topics: Co-benefits assessment, - Energy Access Resource Type: Guide/manual, Training materials Website: www.energysavers.gov/your_home/electricity/index.cfm/mytopic=11070 Cost: Free Language: English DOE-Evaluating A Potential Microhydro Site Screenshot References: DOE-Evaluating A Potential Microhydro Site[1] Logo: DOE-Evaluating A Potential Microhydro Site "To build a microhydropower system, you need access to flowing water on your property. A sufficient quantity of falling water must be available,

472

Preliminary evaluation of wind energy potential: Cook Inlet area, Alaska  

SciTech Connect (OSTI)

This report summarizes work on a project performed under contract to the Alaska Power Administration (APA). The objective of this research was to make a preliminary assessment of the wind energy potential for interconnection with the Cook Inlet area electric power transmission and distribution systems, to identify the most likely candidate regions (25 to 100 square miles each) for energy potential, and to recommend a monitoring program sufficient to quantify the potential.

Hiester, T.R.

1980-06-01T23:59:59.000Z

473

The effects of two-phase flow on streaming potentials  

E-Print Network [OSTI]

of approximately 60 for the capillary. The enhancement in streaming potentials may be important in many different geophysical applications in geothermal zones, earthquake zones and fracture pattern determination in areas such as production wells...). Streaming potentials are associated with some self-potential (SP) anomalies. These anomalies are related to fluid flow and may play a key role in subsurface flow investigations of geothermal resources, earthquake prediction, environmental...

Estrada, Cecilia

2012-06-07T23:59:59.000Z

474

Ambipolar potential formation and axial confinement in TMX  

Science Journals Connector (OSTI)

TMX experimental data on ambipolar potential control and on the accompanying electrostatic confinement are reported. In the radial core of the central cell, measurements of electrostatic potentials of 150 V which augment axial ion confinement are in agreement with predictions using the Maxwell-Boltzmann result. Central-cell ion confinement was observed to scale according to electrostatic potential theory up to average enhancement factors of eight times over mirror confinement alone.

D.L. Correll; S.L. Allen; T.A. Capser; J.F. Clauser; P. Coakley; F.H. Coensgen; W. Condit; W.F. Cummins; J.C. Davis; R.P. Drake; J.H. Foote; A.H. Futch; R.K. Goodman; D.P. Grubb; G.A. Hallock; E.B. Hooper; R.S. Hornady; A.L. Hunt; C.V. Karmendy; A.W. Molvik; W.E. Nexsen; W.L. Pickles; P. Poulsen; T.C. Simonen; B.W. Stallard; O.T. Strand

1982-01-01T23:59:59.000Z

475

Self Potential At Blue Mountain Area (Fairbank Engineering, 2008) | Open  

Open Energy Info (EERE)

Page Page Edit History Facebook icon Twitter icon » Self Potential At Blue Mountain Area (Fairbank Engineering, 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Self Potential At Blue Mountain Area (Fairbank Engineering, 2008) Exploration Activity Details Location Blue Mountain Area Exploration Technique Self Potential Activity Date Usefulness not indicated DOE-funding Unknown Notes Geophysical surveys that have been conducted specifically for the geothermal program at Blue Mountain include a self-potential (SP) survey, and additional IP/electrical resistivity traversing. These surveys were conducted under a cooperative program between Noramex Corporation and the Energy and Geosciences Institute (EGI), University of Utah, with funding

476

Summary of geology of Colorado related to geothermal potential...  

Open Energy Info (EERE)

Journal Article: Summary of geology of Colorado related to geothermal potential Author L.T. Grose Published Journal Colorado Geological Survey Bulletin, 1974 DOI Not Provided...

477

Conservation Potential of Compact Fluorescent Lamps in India and Brazil  

E-Print Network [OSTI]

1988. The private sector in Brazil owned (in 1986) 40% ofElectricity Conservation in Brazil: Potential and Pro-electricity consumption in Brazil's residential sector was

Gadgil, A.J.

2008-01-01T23:59:59.000Z

478

Evaluation of Hulless Barley for Potential Ethanol Production.  

E-Print Network [OSTI]

??The main objective of this study was to evaluate potential of winter hulless barley as a local feedstock for ethanol production in Oklahoma. Two hulless… (more)

Septiano, Wanda Pradjanata

2010-01-01T23:59:59.000Z

479

Potential partnerships and funding from a variety of sources  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Potential partnerships and funding from a variety of sources Alumni Link: Opportunities, News and Resources for Former Employees Latest Issue:January 2015 All Issues submit...

480

ARM Convective Available Potential Energy (CAPE), Convective Inhibition (CIN) Product  

SciTech Connect (OSTI)

ARM soundings are used to determine Convective Available Potential Energy (CAPE), Convective Inhibition (CIN) and associated properties, using the following relationships;

Jensen, Michael

2014-04-10T23:59:59.000Z

Note: This page contains sample records for the topic "hd ngv potential" 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

Potential for the Use of Energy Savings Performance Contracts...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

The review of potential challenges within this report suggests that, while the same care must be exercised as in every prudent government acquisition, there appear to be no...

482

Physics Potential of the gamma=100,100 Beta Beam  

E-Print Network [OSTI]

The physics potential of a Beta Beam fired from CERN to a 440 kton water Cerenkov detector at a distance of 130 Km is computed.

M. Mezzetto

2005-11-02T23:59:59.000Z

483

From Laboratory to Industry: Unlocking the Potential of Graphene...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Materials Return to Search From Laboratory to Industry: Unlocking the Potential of Graphene Brookhaven Lab and Graphene Laboratories collaborate to bring atom-thin material to...

484

Assessment of Achievable Potential from Energy Efficiency and...  

Open Energy Info (EERE)

Achievable Potential from Energy Efficiency and Demand Response Programs in the United States (U.S.) (2010-2030) Jump to: navigation, search Tool Summary LAUNCH TOOL Name:...

485

Electric potential distribution in nanoscale electroosmosis: from molecules to continuum  

E-Print Network [OSTI]

correlations in the electric double layer. 1. Counterionsand correlations in the electric double layer. 2 . SymmetricElectric potential distribution in nanoscale electroosmosis:

Wang, M.; Liu, J.; Chen, S.

2007-01-01T23:59:59.000Z

486

Assessing the Energy Efficiency Potential of Industrial Motor Systems  

E-Print Network [OSTI]

calculation of electricity saving and cost are not presentedto estimate the cost-effective electricity efficiencythe share of cost-effective electricity saving potential of

McKane, Aimee

2014-01-01T23:59:59.000Z

487

Momentum Dependence of Single Particle Potential in Dirac Brueckner Approach  

E-Print Network [OSTI]

The momentum dependence of the empirical scalar and vector potentials needed for describing relativistic heavy-ion collisions at 1 GeV/nucleon is compared with that derived from self-consistent Dirac-Brueckner calculations using the Bonn-A potential. Our calculated scalar and vector potentials exhibit a weak momentum dependence and their magnitudes decrease with nucleon momentum, in close similarity with the momentum dependence required by the empirical potentials. The effects of explicit momentum dependence on the properties of equilibrium nuclear matter are found to be small.

C. -H. Lee; T. T. S. Kuo; G. Q. Li; G. E. Brown

1997-05-05T23:59:59.000Z

488

U.S. Building-Sector Energy Efficiency Potential  

E-Print Network [OSTI]

New York State Energy Research and Development Authority (of conserved energy values from the CEF and New York stateEnergy Efficiency Resource Development Potential In New York.

Brown, Rich

2008-01-01T23:59:59.000Z

489

Multiple scattering approach to one?dimensional potential problems  

Science Journals Connector (OSTI)

By calculating the reflection and transmission coefficients for a square potential barrier in terms of a series of scatterings at step potential discontinuities a multiple scattering approach to potential problems is presented. This approach is applied to WKB potential problems by interpreting the WKB connection formulas in terms of reflection and transmission coefficients at each turning point. An algorithm for the systematic construction of the energy Green’s function is given. The significance of complex coordinate turning points is demonstrated. The equivalence of this approach and that of the Gaussian approximation of the path integral is mentioned briefly.

Arlen Anderson

1989-01-01T23:59:59.000Z

490

NREL Confirms Large Potential for Grid Integration of Wind, Solar...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the discussion about the potential of such variable sources, the National Renewable Energy Laboratory (NREL) launched two key regional studies, examining the east and west...

491

Changing Energy Demand Behavior: Potential of Demand-Side Management  

Science Journals Connector (OSTI)

There is a great theoretical potential to save resources by managing our demand for energy. However, demand-side management (DSM) programs targeting behavioral patterns of...

Dr. Sylvia Breukers; Dr. Ruth Mourik…

2013-01-01T23:59:59.000Z

492

FOIASI - Special Inquiry Review of Allegations InvolvingPotentialMisc...  

Office of Environmental Management (EM)

Office of Environmental Management. The allegations involved potential violations of political activity restrictions, lack of impartiality in performing official duties, misuse of...

493

Assessment of Energy Production Potential from Ocean Currents...  

Broader source: Energy.gov (indexed) [DOE]

Ocean Currents along the United States Coastline Assessment of Energy Production Potential from Ocean Currents along the United States Coastline Report summarizing the results of...

494

Optically generated gauge potentials and their effects in cold atoms.  

E-Print Network [OSTI]

??Recent theoretical studies show the possibility of generating optical gauge potentials in neutral atoms using laser beams carrying orbital angular momentum. This is interesting not… (more)

Song, Jianjun

2008-01-01T23:59:59.000Z

495

Safety Culture at the WTP White Paper: Potential Attachment for...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

292011 Page 1 of 6 Safety Culture at the WTP White Paper: Potential Attachment for Advice on Waste Treatment Plant Safety Culture Introduction This white paper provides context...

496

Potential Health and Environmental Impact from Emerging Technologies...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Health and Environmental Impact from Emerging Technologies and Fuels: A report from the Health Effects Insitute Potential Health and Environmental Impact from Emerging Technologies...

497

Geothermal energy potential in Chaffee County, Colorado | Open...  

Open Energy Info (EERE)

Colorado Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Geothermal energy potential in Chaffee County, Colorado Author F.C. Healy Published...

498

Fuel Displacement & Cost Potential of CNG, LNG, and LPG Vehicles...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

LPG Vehicles Fuel Displacement & Cost Potential of CNG, LNG, and LPG Vehicles 2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and...

499

Assessment of Energy Production Potential from Ocean Currents...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Assessment of Energy Production Potential from Ocean Currents along the United States Coastline Final Project Report September 15, 2013 Georgia Tech Research Corporation Award...

500

ARM Convective Available Potential Energy (CAPE), Convective Inhibition (CIN) Product  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

ARM soundings are used to determine Convective Available Potential Energy (CAPE), Convective Inhibition (CIN) and associated properties, using the following relationships;

Jensen, Michael