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1

A Search For the Higgs Boson in CMS in the Two Photon Decay Channel  

E-Print Network (OSTI)

We report on a search for SM Higgs Boson in the two photon decay mode conducted by the CMS experiment with the data accumulated during the 2010 & 2011 running of the LHC at center of mass collision energy of 7 TeV.

Palmer, Christopher

2011-01-01T23:59:59.000Z

2

A Search For the Higgs Boson in CMS in the Two Photon Decay Channel  

E-Print Network (OSTI)

We report on a search for SM Higgs Boson in the two photon decay mode conducted by the CMS experiment with the data accumulated during the 2010 & 2011 running of the LHC at center of mass collision energy of 7 TeV.

Christopher Palmer

2011-09-30T23:59:59.000Z

3

OBSERVATION AND MEASUREMENT OF THE HIGGS-LIKE BOSON AT 125 GEV IN THE TWO-PHOTON DECAY CHANNEL WITH THE CMS EXPERIMENT.  

E-Print Network (OSTI)

??We present results for the search for the Standard Model Higgs boson in the two-photon channel using the full 2011+2012 dataset recorded by the CMS… (more)

Quan, Xiaohang

2013-01-01T23:59:59.000Z

4

Two-photon interference with thermal light  

E-Print Network (OSTI)

The study of entangled states has greatly improved the basic understanding about two-photon interferometry. Two-photon interference is not the interference of two photons but the result of superposition among indistinguishable two-photon amplitudes. The concept of two-photon amplitude, however, has generally been restricted to the case of entangled photons. In this letter we report an experimental study that may extend this concept to the general case of independent photons. The experiment also shows interesting practical applications regarding the possibility of obtaining high resolution interference patterns with thermal sources.

Giuliano Scarcelli; Alejandra Valencia; Yanhua Shih

2004-10-27T23:59:59.000Z

5

Observation of two-photon interference with temporally non-overlapping coherent pulses  

E-Print Network (OSTI)

We report experiments on two-photon interference between temporally non-overlapping weak coherent pulses. While the single-photon interference is washed out, the two-photon interference shows a Hong-Ou-Mandel dip with visibility of $0.50\\pm0.09$, which shows that the two-photon classical interference does not require temporal overlapping between optical pulses.

Kim, Yong-Su; Kuo, Paulina S; Tang, Xiao

2013-01-01T23:59:59.000Z

6

Two-photon decay of excited levels in hydrogen: The ambiguity of the separation of cascades and pure two-photon emission  

SciTech Connect

The problem of the evaluation of the two-photon decay width of excited states in hydrogen is considered. Two different approaches to the evaluation of the width including cascades channels are employed: the summation of the transition probabilities for various decay channels and the evaluation of the imaginary part of the Lamb shift. As application, the two-photon decay channels for the 3s level of the hydrogen atom are evaluated, including the cascade transition probability 3s-2p-1s. An important role is assigned to the two-photon decays in astrophysics context, since processes of this kind provide a possibility for the decoupling of radiation and matter in the early universe. We demonstrate the ambiguity of separation of the 'pure' two-photon contribution and criticize the existing methods for such a separation.

Labzowsky, L. [V. A. Fock Institute of Physics, St. Petersburg State University, Petrodvorets, Oulianovskaya 1, 198504 St. Petersburg (Russian Federation); Petersburg Nuclear Physics Institute, Gatchina, 188300 St. Petersburg (Russian Federation); Solovyev, D. [V. A. Fock Institute of Physics, St. Petersburg State University, Petrodvorets, Oulianovskaya 1, 198504 St. Petersburg (Russian Federation); Plunien, G. [Technische Universitaet Dresden, Mommsenstrasse 13, D-01062 Dresden (Germany)

2009-12-15T23:59:59.000Z

7

Laser Scanning Two Photon and Confocal Microscope  

Science Conference Proceedings (OSTI)

... The SP5 is a laser scanning two-photon and confocal microscope equipped with ... nm HeNe, and tunable IR (680 nm - 1060 nm) lasers * 4 internal ...

2012-10-01T23:59:59.000Z

8

Two-Photon Physics in Hadronic Processes  

DOE Green Energy (OSTI)

Two-photon exchange contributions to elastic electron-scattering are reviewed. The apparent discrepancy in the extraction of elastic nucleon form factors between unpolarized Rosenbluth and polarization transfer experiments is discussed, as well as the understanding of this puzzle in terms of two-photon exchange corrections. Calculations of such corrections both within partonic and hadronic frameworks are reviewed. In view of recent spin-dependent electron scattering data, the relation of the two-photon exchange process to the hyperfine splitting in hydrogen is critically examined. The imaginary part of the two-photon exchange amplitude as can be accessed from the beam normal spin asymmetry in elastic electron-nucleon scattering is reviewed. Further extensions and open issues in this field are outlined.

Carl Carlson; Marc Vanderhaeghen

2007-11-01T23:59:59.000Z

9

Light Dark Matter Annihilations into Two Photons  

E-Print Network (OSTI)

We compute the pair annihilation cross section of light (spin-0) dark matter particles into two photons and discuss the detectability of the monochromatic line associated with these annihilations.

C. Boehm; J. Orloff; P. Salati

2006-07-19T23:59:59.000Z

10

Two-photon production of charged pion and kaon pairs  

E-Print Network (OSTI)

A measurement of the cross section for the combined two-photon production of charged pion and kaon pairs is performed using 1.2~\\rm fb^{-1} of data collected by the CLEO II detector at the Cornell Electron Storage Ring. The cross section is measured at invariant masses of the two-photon system between 1.5 and 5.0~GeV/c^2, and at scattering angles more than 53^\\circ away from the \\gamma\\gamma collision axis in the \\gamma\\gamma center-of-mass frame. The large background of leptonic events is suppressed by utilizing the CsI calorimeter in conjunction with the muon chamber system. The reported cross section is compared with leading order QCD models as well as previous experiments. In particular, although the functional dependence of the measured cross section disagrees with leading order QCD at small values of the two-photon invariant mass, the data show a transition to perturbative behavior at an invariant mass of approximately 2.5~GeV/c^2. hardcopies with figures can be obtained by writing to to: Pam Morehouse ...

Dominick, J; Sanghera, S; Shelkov, V; Skwarnicki, T; Stroynowski, R; Volobuev, I P; Wei, G; Zadorozhny, P; Artuso, M; Goldberg, M; He, D; Horwitz, N; Kennett, R; Mountain, R; Moneti, G C; Muheim, F; Mukhin, Y; Playfer, S; Rozen, Y; Stone, S; Thulasidas, M; Vasseur, G; Zhu, G; Bartelt, J; Csorna, S E; Egyed, Z; Jain, V; Kinoshita, K; Edwards, K W; Ogg, M; Britton, D I; Hyatt, E R F; MacFarlane, D B; Patel, P M; Akerib, D S; Barish, B C; Chadha, M; Chan, S; Cowen, D F; Eigen, G; Miller, J S; O'Grady, C; Urheim, J; Weinstein, A J; Acosta, D; Athanas, M; Masek, G E; Paar, H P; Sivertz, M; Gronberg, J B; Kutschke, R; Menary, S R; Morrison, R J; Nakanishi, S; Nelson, H N; Nelson, T K; Qiao, C; Richman, J D; Ryd, A; Tajima, H; Sperka, D; Witherell, M S; Procario, M; Balest, R; Cho, K; Daoudi, M; Ford, W T; Johnson, D R; Lingel, K; Lohner, M; Rankin, P; Smith, J G; Alexander, J P; Bebek, C; Berkelman, K; Bloom, K; Browder, T E; Cassel, David G; Cho, H A; Coffman, D M; Drell, P S; Ehrlich, R; Gaidarev, P B; Galik, R S; García-Sciveres, M; Geiser, B; Gittelman, B; Gray, S W; Hartill, D L; Heltsley, B K; Jones, C D; Jones, S L; Kandaswamy, J; Katayama, N; Kim, P C; Kreinick, D L; Ludwig, G S; Masui, J; Mevissen, J; Mistry, N B; Ng, C R; Nordberg, E; Patterson, J R; Peterson, D; Riley, D; Salman, S; Sapper, M; Würthwein, F; Avery, P; Freyberger, A P; Rodríguez, J; Stephens, R; Yang, S; Yelton, J; Cinabro, D; Henderson, S; Liu, T; Saulnier, M; Wilson, R; Yamamoto, H; Bergfeld, T; Eisenstein, B I; Gollin, G; Ong, B; Palmer, M; Selen, M; Thaler, J J; Sadoff, A J; Ammar, R; Ball, S; Baringer, P; Bean, A; Besson, D; Coppage, D; Copty, N K; Davis, R; Hancock, N; Kelly, M; Kwak, N; Lam, H; Kubota, Y; Lattery, M; Nelson, J K; Patton, S; Perticone, D; Poling, R A; Savinov, V; Schrenk, S; Wang, R; Alam, M S; Kim, I J; Nemati, B; O'Neill, J J; Severini, H; Sun, C R; Zoeller, M M; Crawford, G; Daubenmier, C M; Fulton, R; Fujino, D; Gan, K K; Honscheid, K; Kagan, H; Kass, R; Lee, J; Malchow, R L; Skovpen, Y; Sung, M; White, C; Butler, F; Fu, X; Kalbfleisch, G R; Ross, W R; Skubic, P L; Snow, J; Wang, P L; Wood, M; Brown, D N; Fast, J; McIlwain, R L; Miao, T; Miller, D H; Modesitt, M; Payne, D; Shibata, E I; Shipsey, I P J; Wang Pei Ning; Battle, M; Ernst, J; Kwon, Y; Roberts, S; Thorndike, E H; Wang, C H

1994-01-01T23:59:59.000Z

11

Hyperspectral imaging of microalgae using two-photon excitation.  

SciTech Connect

A considerable amount research is being conducted on microalgae, since microalgae are becoming a promising source of renewable energy. Most of this research is centered on lipid production in microalgae because microalgae produce triacylglycerol which is ideal for biodiesel fuels. Although we are interested in research to increase lipid production in algae, we are also interested in research to sustain healthy algal cultures in large scale biomass production farms or facilities. The early detection of fluctuations in algal health, productivity, and invasive predators must be developed to ensure that algae are an efficient and cost-effective source of biofuel. Therefore we are developing technologies to monitor the health of algae using spectroscopic measurements in the field. To do this, we have proposed to spectroscopically monitor large algal cultivations using LIDAR (Light Detection And Ranging) remote sensing technology. Before we can deploy this type of technology, we must first characterize the spectral bio-signatures that are related to algal health. Recently, we have adapted our confocal hyperspectral imaging microscope at Sandia to have two-photon excitation capabilities using a chameleon tunable laser. We are using this microscope to understand the spectroscopic signatures necessary to characterize microalgae at the cellular level prior to using these signatures to classify the health of bulk samples, with the eventual goal of using of LIDAR to monitor large scale ponds and raceways. By imaging algal cultures using a tunable laser to excite at several different wavelengths we will be able to select the optimal excitation/emission wavelengths needed to characterize algal cultures. To analyze the hyperspectral images generated from this two-photon microscope, we are using Multivariate Curve Resolution (MCR) algorithms to extract the spectral signatures and their associated relative intensities from the data. For this presentation, I will show our two-photon hyperspectral imaging results on a variety of microalgae species and show how these results can be used to characterize algal ponds and raceways.

Sinclair, Michael B.; Melgaard, David Kennett; Reichardt, Thomas A. (Sandia National Laboratories, Livermore, CA); Timlin, Jerilyn Ann; Garcia, Omar Fidel; Luk, Ting Shan; Jones, Howland D. T.; Collins, Aaron M.

2010-10-01T23:59:59.000Z

12

Evidence of the Higgs Boson Decaying into Two Photons.  

E-Print Network (OSTI)

??A search for the standard model Higgs boson decaying to two photons will be presented. The analysis will cover 5.1 fb-1 and 19.6 fb-1 of… (more)

Berry, Douglas R

2013-01-01T23:59:59.000Z

13

Two-photon interference with true thermal light  

E-Print Network (OSTI)

Two-photon interference and "ghost" imaging with entangled light have attracted much attention since the last century because of the novel features such as non-locality and sub-wavelength effect. Recently, it has been found that pseudo-thermal light can mimic certain effects of entangled light. We report here the first observation of two-photon interference with true thermal light.

Yan-Hua Zhai; Xi-Hao Chen; Da Zhang; Ling-An Wu

2005-06-07T23:59:59.000Z

14

Two-photon exchange corrections to the pion form factor  

Science Conference Proceedings (OSTI)

We compute two-photon exchange corrections to the electromagnetic form factor of the pion, taking into account the finite size of the pion. Compared to the soft-photon approximation for the infrared-divergent contribution, which neglects hadron structure effects, the corrections are found to be or approx.1 GeV{sup 2} at extreme backward angles.

Blunden, P. G. [Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2 (Canada); Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606 (United States); Melnitchouk, W. [Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606 (United States); Tjon, J. A. [Physics Department, University of Utrecht, NL-3508 TC Utrecht (Netherlands)

2010-01-15T23:59:59.000Z

15

Two-loop corrections to gluon fusion into two photons  

SciTech Connect

An overview of the calculation of the two-loop helicity amplitudes for scattering of two gluons into two photons is presented. These matrix elements enter into the recent improved calculation of the QCD background to Higgs boson decay into a pair of photons, which is the preferred search mode at the LHC for the case of a light Higgs boson.

Dixon, Lance

2002-12-20T23:59:59.000Z

16

Search for Anomalous Production of Events with Two Photons and Additional Energetic Objects at CDF  

SciTech Connect

The authors present results of a search for anomalous production of two photons together with an electron, muon, {tau} lepton, missing transverse energy, or jets using p{bar p} collision data from 1.1-2.0 fb{sup -1} of integrated luminosity collected by the Collider Detector at Fermilab (CDF). The event yields and kinematic distributions are examined for signs for new physics without favoring a specific model of new physics. The results are consistent with the standard model expectations. The search employs several new analysis techniques that significantly reduce instrumental backgrounds in channels with an electron and missing transverse energy.

Aaltonen, T.; /Helsinki Inst. of Phys.; Adelman, J.; /Chicago U., EFI; Alvarez Gonzalez, B.; /Oviedo U. /Cantabria Inst. of Phys.; Amerio, S.; /Padua U. /INFN, Padua; Amidei, D.; /Michigan U.; Anastassov, A.; /Northwestern U.; Annovi, A.; /Frascati; Antos, J.; /Comenius U. /Kosice, IEF; Apollinari, G.; /Fermilab; Apresyan, A.; /Purdue U.; Arisawa, T.; /Waseda U. /Dubna, JINR

2009-10-01T23:59:59.000Z

17

Two-photon spectroscopy of trapped HD$^+$ ions in the Lamb-Dicke regime  

E-Print Network (OSTI)

We study the feasibility of nearly-degenerate two-photon rovibrational spectroscopy in ensembles of trapped, sympathetically cooled hydrogen molecular ions using a resonance-enhanced multiphoton dissociation (REMPD) scheme. Taking advantage of quasi-coincidences in the rovibrational spectrum, the excitation lasers are tuned close to an intermediate level to resonantly enhance two-photon absorption. Realistic simulations of the REMPD signal are obtained using a four-level model that takes into account saturation effects, ion trajectories, laser frequency noise and redistribution of population by blackbody radiation. We show that the use of counterpropagating laser beams enables optical excitation in an effective Lamb-Dicke regime. Sub-Doppler lines having widths in the 100 Hz range can be observed with good signal-to-noise ratio for an optimal choice of laser detunings. Our results indicate the feasibility of molecular spectroscopy at the $10^{-14}$ accuracy level for improved tests of molecular QED, a new det...

Tran, Vu Quang; Douillet, Albane; Koelemeij, Jeroen C J; Hilico, Laurent

2013-01-01T23:59:59.000Z

18

Two-photon exclusive processes in quantum chromodynamics  

SciTech Connect

QCD predictions for ..gamma gamma.. annihilation into single mesons, meson pairs, and baryon pairs are reviewed. Two-photon exclusive processes provide the most sensitive and practical measure of the distribution amplitudes, and thus a critical confrontation between QCD and experiment. Both the angular distribution and virtual photon mass dependence of these amplitudes are sensitive to the shapes of the phi (chi, Q). Novel effects involving the production of qq anti q anti q states at threshold are also discussed, and a new method is presented for systematically incorporating higher-order QCD corrections in ..gamma gamma.. reactions.

Brodsky, S.J.

1986-07-01T23:59:59.000Z

19

Two Photon Decays of Charmonia from Lattice QCD  

E-Print Network (OSTI)

We make the first calculation in lattice QCD of two-photon decays of mesons. Working in the charmonium sector, using the LSZ reduction to relate a photon to a sum of hadronic vector eigenstates, we compute form-factors in both the space-like and time-like domains for the transitions $\\eta_c \\to \\gamma^* \\gamma^*$ and $\\chi_{c0} \\to \\gamma^* \\gamma^*$. At the on-shell point we find approximate agreement with experimental world-average values.

Jozef J. Dudek; Robert G. Edwards

2006-07-12T23:59:59.000Z

20

Correlated two-photon imaging with true thermal light  

E-Print Network (OSTI)

We report the first experimental demonstration of two-photon correlated imaging with true thermal light from a hollow cathode lamp. The coherence time of the source is much shorter than that of previous experiments using random scattered light from a laser. A two-pinhole mask was used as object, and the corresponding thin lens equation was well satisfied. Since thermal light sources are easier to obtain and measure than entangled light it is conceivable that they may be used in special imaging applications.

Da Zhang; Xi-Hao Chen; Yan-Hua Zhai; Ling-An Wu

2005-03-14T23:59:59.000Z

Note: This page contains sample records for the topic "two-photon channel shows" 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

Two-photon joint temporal density measurements via ultrafast single-photon upconversion  

E-Print Network (OSTI)

We have developed the technique of two-photon joint temporal density measurements for temporal state characterization, thus facilitating two-photon generation with high temporal entanglement or nearly factorizable outputs ...

Wong, Franco N. C.

22

Two-photon (vuv and visible) resonant ionization spectroscopy of atoms and molecules  

DOE Green Energy (OSTI)

Two photon spectroscopy of argon, krypton and molecular hydrogen is considered in this paper. Experimental transition energies and two-photon rate constants are given. 4 refs., 1 tab. (LSP)

McCann, M.P.; Chen, C.H.; Payne, M.G.

1987-12-01T23:59:59.000Z

23

The conservation of orbital angular momentum and the two-photon detection amplitude in spontaneous parametric down-conversion  

E-Print Network (OSTI)

We study the two-photon detection amplitude of the down-converted beams in spontaneous parametric down-conversion when the physical variable of orbital angular momentum is involved, taking into account both conservation and non-conservation of angular momentum. Agreeing with experimental observations, our theoretical calculation shows that spatial structure of the two-photon detection amplitude of the down-converted beams carries important information about conservation or non-conservation of orbital angular momentum in spontaneous parametric down-conversion.

Sheng Feng; Chao-Hsiang Chen; Geraldo A. Barbosa; Prem Kumar

2007-03-20T23:59:59.000Z

24

Two-photon exchange effect studied with neural networks  

SciTech Connect

An approach to the extraction of the two-photon exchange (TPE) correction from elastic ep scattering data is presented. The cross-section, polarization transfer (PT), and charge asymmetry data are considered. It is assumed that the TPE correction to the PT data is negligible. The form factors and TPE correcting term are given by one multidimensional function approximated by the feedforward neural network (NN). To find a model-independent approximation, the Bayesian framework for the NNs is adapted. A large number of different parametrizations is considered. The most optimal model is indicated by the Bayesian algorithm. The obtained fit of the TPE correction behaves linearly in {epsilon} but it has a nontrivial Q{sup 2} dependence. A strong dependence of the TPE fit on the choice of parametrization is observed.

Graczyk, Krzysztof M. [Institute of Theoretical Physics, University of Wroclaw, pl. M. Borna 9, PL-50-204 Wroclaw (Poland)

2011-09-15T23:59:59.000Z

25

Contribution of spin 1/2 and 3/2 resonances to two-photon exchange effects in elastic electron-proton scattering  

Science Conference Proceedings (OSTI)

We calculate contributions of hadron resonances to two-photon exchange effects in electron-proton scattering. In addition to the nucleon and P33 resonance, the following heavier resonances are included as intermediate states in the two-photon exchange diagrams: D13,D33,P11,S11, and S31. We show that the corrections due to the heavier resonances are smaller than the dominant nucleon and P33 contributions. We also find that there is a partial cancellation between the contributions from the spin 1/2 and spin 3/2 resonances, which results in a further suppression of their aggregate two-photon exchange effect.

Kondratyuk, S.; Blunden, P. G. [Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, R3T 2N2 (Canada)

2007-03-15T23:59:59.000Z

26

Two-Photon Exchange E#27;ffects in Elastic Electron-Proton Scattering  

Science Conference Proceedings (OSTI)

Two methods, Rosenbluth separation and polarization transfer, can be used to extract the proton form factor ratio #22;mu_p G_Ep/G_Mp, but they do not yield the same results. It is thought that the disagreement is due to two photon exchange corrections to the #27;differential cross sections. High precision proton Rosenbluth extractions were carried out at 102 kinematics points spanning 16 values of momentum transfer Q^2, from 0.40 to 5.76 GeV^2. Reduced cross sections were found to 1.1% or better for Q^2 less than 3 GeV^2, increasing to 4% at 5.76 GeV^2. The form factor ratios were determined to 1:5-3% for Q2 < 1.5 GeV^2, increasing to 9% by 3 GeV^2 and rapidly above. Our data agrees with prior Rosenbluth, improving upon it the 1.0 - 2.0 GeV^2 range to conclusively show a separation from polarization transfer where it had not been certain before. In addition, reduced cross sections at each Q^2 were tested for nonlinearity in the angular variable. Such a departure from linearity would be a signature of two photon exchange effects, and prior data had not been #30;sufficiently precise to show nonzero curvature. Our data begins to hint at negative curvature but does not yet show a significant departure from zero.

Argonne National Laboratory

2013-08-01T23:59:59.000Z

27

Optimization of Two-photon Excited Fluorescence Enhancement between Tunable and Broadband Femtosecond Laser Pulse Excitations  

E-Print Network (OSTI)

This project explores optimization of two-photon excited fluorescence (TPEF) enhancement between tunable narrowband and un-tuned broadband femtosecond (fs) laser pulse excitations for two-photon microscopy (TPM). The research is conducted preliminarily in time domain and comprehensively in frequency domain to understand the physics behind TPEF enhancement by un-tuned sub-10 fs nearly transform-limited pulse (TLP) versus tunable 140 fs pulse. The preliminary study on inverse proportionality of TPEF yield to fs-pulse duration delimits a general lower-bound to narrowband fs-pulse regime (pulse duration > 40 fs) with assumption of dye-molecule frequency invariant response. Deviations from this inverse proportionality in broadband fs-pulse regime (pulse duration < 40 fs) highlights dye-molecule frequency variant response, necessity of group delay dispersion (GDD) compensation, and broadband TLP for TPEF enhancement. The follow-up comparative study is made on un-tuned sub-10 fs TLP versus tunable 140 fs pulse excitations using three dye-phantoms (Indo-1, FITC, and TRITC) representative of fluorescent probes with similar TPEF characteristics. The integrated experimental system, with custom-designed GDD compensation, dispersion-less laser-beam expanding and focusing, and compound-lens for efficient fluorescence collection with good spectral resolution, ensures accurate TPEF measurements. Differentiated TPEF enhancements of Indo-1 (1.6), FITC (6.7), and TRITC (5.2) proportionally agree with calculated ones due to the overlap of fs-pulse second harmonic (SH) power spectrum with dye-molecule two-photon excitation (TPE) spectrum. Physically speaking, with broadband sub-10 fs TLP readily involved in both degenerate (v1 = v2) and non-degenerate (v1 ? v2) two-photon absorption (TPA), this un-tuned ultrashort fs-pulse excitation simultaneously allows for more accessibility to TPA-associated final states and diversely promotes population of thus excited dye-molecules with the three dye-phantoms. Under environmental influences (mutual quenching through one-photon absorption(s) and solvent effect), multicolor TPEF enhancement observed from a mixture of the three dyes shows promise of sub-10 fs TLP as simultaneous excitation for multiple-dye labeled samples in contrast to compromised excitation with narrowband fs-pulse tuning. Both single- and multicolor TPEF enhancements clarify tradeoff between tunability of narrowband fs-pulse and un-tuned broadband fs-pulse excitations, being instructive to further considerations on optimization of TPEF enhancement by strategic utilization of broadband fs-pulse for better performance of TPM.

Wang, Chao

2011-12-01T23:59:59.000Z

28

Electron correlation in two-photon double ionization of helium from attosecond to FEL pulses  

SciTech Connect

We investigate the role of electron correlation in the two-photon double ionization of helium for ultrashort pulses in the extreme ultraviolet (XUV) regime with durations ranging from a hundred attoseconds to a few femtoseconds. We perform time-dependent ab initio calculations for pulses with mean frequencies in the so-called 'sequential' regime ({Dirac_h}{omega} > 54.4 eV). Electron correlation induced by the time correlation between emission events manifests itself in the angular distribution of the ejected electrons, which strongly depends on the energy sharing between them. We show that for ultrashort pulses two-photon double ionization probabilities scale non-uniformly with pulse duration depending on the energy sharing between the electrons. Most interestingly we find evidence for an interference between direct ('nonsequential') and indirect ('sequential') double photoionization with intermediate shake-up states, the strength of which is controlled by the pulse duration. This observation may provide a route towards measuring the pulse duration of x-ray free-electron laser (XFEL) pulses.

Collins, Lee [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

29

Two-photon absorption spectroscopy of the trivalent cerium ion in calcium fluoride  

Science Conference Proceedings (OSTI)

The two-photon transitions from the lowest 4f to the 5d states of the C/sub 4v/ center in Ce/sup 3 +/:CaF/sub 2/ from 31,900 to 50,500 cm/sup -1/ have been studied with a tunable dye laser as a function of laser wavelength, intensity, polarization and focusing geometry. A fluorescence detection technique was used to measure the two-photon absorption (TPA). The observed TPA spectra consist of two well resolved bands in the wavelength intervals 627 to 590 nm and 520 to 450 nm respectively, and two unresolved bands in the range 410 to 396 nm. At 8/sup 0/K the lowest energy band consists of a zero-phonon line accompanied by its vibrational sideband. The peak TPA cross section for the zero-phonon transition is of the order 5x10/sup -54/ cm/sup 4/sec, indicating significant crystal-field parity mixing for the participating states. The zero-phonon line shows a polarization anisotropy consistent with a Ce/sup 3 +/ site of C/sub 4v/ symmetry. The phonon sideband has a frequency dependent polarization anisotropy. 76 references, 35 figures, 13 tables.

Gayen, S.K.

1984-01-01T23:59:59.000Z

30

Electron correlation in two-photon double ionization of helium from attosecond to FEL pulses  

SciTech Connect

We investigate the role of electron correlation in the two-photon double ionization of helium for ultrashort pulses in the extreme ultraviolet (XUV) regime with durations ranging from a hundred attoseconds to a few femtoseconds. We perform time-dependent ab initio calculations for pulses with mean frequencies in the so-called 'sequential' regime ({Dirac_h}{omega} > 54.4 eV). Electron correlation induced by the time correlation between emission events manifests itself in the angular distribution of the ejected electrons, which strongly depends on the energy sharing between them. We show that for ultrashort pulses two-photon double ionization probabilities scale non-uniformly with pulse duration depending on the energy sharing between the electrons. Most interestingly we find evidence for an interference between direct ('nonsequential') and indirect ('sequential') double photoionization with intermediate shake-up states, the strength of which is controlled by the pulse duration. This observation may provide a route towards measuring the pulse duration of x-ray free-electron laser (XFEL) pulses.

Collins, Lee [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

31

Two-photon approximation in the theory of electron recombination in hydrogen  

Science Conference Proceedings (OSTI)

A rigorous quantum electrodynamics theory of the multiphoton decay of excited states in a hydrogen atom is presented. The ''two-photon'' approximation is formulated which is limited by the one- and two-photon transitions including cascade transitions with two-photon links. This may be helpful for the strict description of the recombination process in a hydrogen atom and, in principle, for the history of hydrogen recombination in the early universe.

Solovyev, D. [V. A. Fock Institute of Physics, St. Petersburg State University, Petrodvorets, Oulianovskaya 1, 198504 St. Petersburg (Russian Federation); Labzowsky, L. [V. A. Fock Institute of Physics, St. Petersburg State University, Petrodvorets, Oulianovskaya 1, 198504 St. Petersburg (Russian Federation); Petersburg Nuclear Physics Institute, Gatchina, 188300 St. Petersburg (Russian Federation)

2010-06-15T23:59:59.000Z

32

Two-photon exchange in elastic electron-proton scattering: theoretical issues  

Science Conference Proceedings (OSTI)

Recent theoretical developments on selected topics in the effect of two-photon exchange on elastic electron-proton scattering are reviewed.

Blunden, Peter G. [Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2 (Canada)

2009-09-02T23:59:59.000Z

33

Absolute rate measurements of two-photon process of gases, liquids, and solids  

DOE Green Energy (OSTI)

Due to rapid improvements in high-power laser performance, two-photon absorption processes have become a very useful tool for studying the molecular structures of various gases, liquids and solids. However, measurements of absolute two-photon absorption cross sections were more or less ignored previously because of their small size. In this work, we obtained not only the two-photon absorption spectra, but also measurements of their absolute cross sections for various gases, liquids, and solids. 8 refs., 1 fig., 1 tab.

Chen, C.H.; McCann, M.P.; Payne, M.G.

1987-12-01T23:59:59.000Z

34

Development of high-speed two-photon microscopy for biological and medical applications  

E-Print Network (OSTI)

Two-photon microscopy (TPM) is one of the most powerful microscopic technologies for in-vivo 3D tissue imaging up to a few hundred micrometers. It has been finding important applications in neuronal imaging, tumor physiology ...

Kim, Ki Hean

2005-01-01T23:59:59.000Z

35

Relativistic calculation of the two-photon decay rate of highly-excited ionic states  

E-Print Network (OSTI)

Based on quantum electrodynamics, we reexamine the two-photon decay of one-electron atoms. Special attention is paid to the calculation of the (two-photon) total decay rates which can be viewed as the imaginary part of the two-loop self-energy. We argue that our approach can easily be applied to the cases with a virtual state having an intermediate energy between the initial and the final state of the decay process leading, thus, to the resonance peaks in the two-photon energy distribution. In order to illustrate our approach, we obtain fully relativistic results, resolved into electric and magnetic multipole components, for the two-photon decay rates of the 3S_{1/2} -> 1S_{1/2} transition in neutral hydrogen as well as in various hydrogen-like ions.

Jentschura, Ulrich D

2008-01-01T23:59:59.000Z

36

Two-photon (VUV + visible) resonance ionization spectroscopy of molecular hydrogen  

DOE Green Energy (OSTI)

Two-photon transitions have been examined in molecular hydrogen using coherent vacuum ultraviolet (VUV) photons at a fixed wavelength of 118 nm and a tunable photon from a dye laser. Though the VUV intensity is very weak (/approximately/100 nJ per pulse) it was utilized very efficiently since most VUV photons in the ionoization region were absorbed. This is the first time that coherent VUV light has been employed with tunable visible light for the production of two-photon spectra and the measurement of two-photon rates. A new parameter is proposed for direct comparison of the data from various two-photon experiments. 4 refs., 2 figs., 1 tab.

McCann, M.P.; Chen, C.H.; Payne, M.G.

1988-04-01T23:59:59.000Z

37

Search for resonances decaying to etac pi pi- in two-photon interactions  

SciTech Connect

We report a study of the process {gamma}{gamma} {yields} X {yields} {eta}{sub c}{pi}{sup +}{pi}{sup -}, where X stands for one of the resonances {chi}{sub c2}(1P), {eta}{sub c}(2S), X(3872), X(3915), or {chi}{sub c2}(2P). The analysis is performed with a data sample of 473.9 fb{sup -1} collected with the BABAR detector at the PEP-II asymmetric-energy electron-positron collider. We do not observe a significant signal for any channel, and calculate 90% confidence-level upper limits on the products of branching fractions and two-photon widths {Lambda}{sub X{yields}{gamma}{gamma}} {Beta}(X {yields} {eta}{sub c}{pi}{sup +}{pi}{sup -}): 15.7 eV for {chi}{sub c2}(1P), 133 eV for {eta}{sub c}(2S), 11.1 eV for X(3872) (assuming it to be a spin-2 state), 16 eV for X(3915) (assuming it to be a spin-2 state), and 19 eV for {chi}{sub c2}(2P). We also report upper limits on the ratios of branching fractions {Beta}({eta}{sub c}(2S) {yields} {eta}{sub c}{pi}{sup +}{pi}{sup -})/{Beta}({eta}{sub c}(2S) {yields} K{sub S}{sup 0}K{sup +}{pi}{sup -}) < 10.0 and {Beta}({chi}{sub c2}(1P) {yields} {eta}{sub c}{pi}{sup +}{pi}{sup -})/{Beta}({chi}{sub c2}(1P) {yields} K{sub S}{sup 0}K{sup +}{pi}{sup -}) < 32.9 at the 90% confidence level.

Lees, J.P.; Poireau, V.; Tisserand, V.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Palano, A.; /Bari U. /INFN, Bari; Eigen, G.; Stugu, B.; /Bergen U.; Brown, D.N.; Kerth, L.T.; Kolomensky, Yu.G.; Lynch, G.; /LBL, Berkeley /UC, Berkeley; Koch, H.; Schroeder, T.; /Ruhr U., Bochum; Asgeirsson, D.J.; Hearty, C.; Mattison, T.S.; McKenna, J.A.; So, R.Y.; /British Columbia U.; Khan, A.; /Brunel U.; Blinov, V.E.; /Novosibirsk, IYF /UC, Irvine /UC, Riverside /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. /Dortmund U. /Dresden, Tech. U. /Ecole Polytechnique /Edinburgh U. /Ferrara U. /INFN, Ferrara /Frascati /Genoa U. /INFN, Genoa /Indian Inst. Tech., Guwahati /Harvard U. /Harvey Mudd Coll. /Heidelberg U. /Humboldt U., Berlin /Imperial Coll., London /Iowa State U. /Iowa State U. /Johns Hopkins U. /Orsay, LAL /LLNL, Livermore /Liverpool U. /Queen Mary, U. of London /Royal Holloway, U. of London /Louisville U. /Mainz U., Inst. Kernphys. /Manchester U., Comp. Sci. Dept. /Maryland U. /Massachusetts U., Amherst /MIT /McGill U. /Milan U. /INFN, Milan /Mississippi U. /Montreal U. /Naples U. /INFN, Naples /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U.; /more authors..

2012-06-18T23:59:59.000Z

38

Transmission area and two-photon correlated imaging  

E-Print Network (OSTI)

The relationship between transmission area of an object imaged and the visibility of its image is investigated in a lensless system. We show that the changes of the visibility are quite different when the transmission area is varied by different manners. An increase of the transmission by adding the slit number leads to a decrease of the visibility. While, the change is adverse when the slit width is widened for a given distance between two slits.

Yanfeng Bai; Shensheng Han; Honglin Liu

2006-11-03T23:59:59.000Z

39

Two-photon interference of photon pairs created in photonic crystal fibers  

E-Print Network (OSTI)

We investigate a method to produce photon pairs by four-wave mixing in photonic crystal fibers (PCFs). By controlling the wavelength of the pump light, which determines the phase matching condition for four-wave mixing, we can obtain a broader spectrum of photon pairs than undesired Raman-scattered photons. We observe two-photon interference of photon pairs from a PCF with the help of an unbalanced Mach-Zehnder interferometer. Two-photon interference fringes with 83% visibility, which exceeds the classical limit of 50%, are obtained.

Toshihiro Nakanishi; Kazuo Sakemi; Hirokazu Kobayashi; Kazuhiko Sugiyama; Masao Kitano

2009-02-01T23:59:59.000Z

40

Global analysis of proton elastic form factor data with two-photon exchange corrections  

SciTech Connect

We use the world's data on elastic electron-proton scattering and calculations of two-photon exchange effects to extract corrected values of the proton's electric and magnetic form factors over the full Q^2 range of the existing data. Our analysis combines the corrected Rosenbluth cross section and polarization transfer data, and is the first extraction of G_Ep and G_Mp including explicit two-photon exchange corrections and their associated uncertainties. In addition, we examine the angular dependence of the corrected cross sections, and discuss the possible nonlinearities of the cross section as a function of epsilon.

J. Arrington; W. Melnitchouk; J. A. Tjon

2007-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "two-photon channel shows" from the National Library of EnergyBeta (NLEBeta).
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41

Two-photon double ionization of H2 using exterior complex scaling  

DOE Green Energy (OSTI)

We report converged calculations of fully, singly differential and total cross sections for two-photon double ionization of the hydrogen molecule in the range of 26-30 eV. These results have been obtained by using the method of exterior complex scaling combined with the use of DVR basis set.

Horner, Daniel A [Los Alamos National Laboratory; Morales, F [UNIV AUTONOMA DE MADRID; Martin, F [UNIV AUTONOMA DE MADRID; Rescigno, T N [LBNL; Mccurdy, C W [LBNL

2009-01-01T23:59:59.000Z

42

Measurement of the spectral shape for the two-photon decay in heliumlike gold  

E-Print Network (OSTI)

, USA c Soltan Institute for Nuclear Studies, 05-400 Swierk, Poland d Institute of Nuclear Research of the continuous spectrum of the two-photon decay in heavy heliumlike ions provides a sensitive test of the details measurements Nuclear Instruments and Methods in Physics Research B 146 (1998) 62±66 * Corresponding author. Tel

43

Evidence for the Direct Two-Photon Transition from $\\psi'$ to $J/\\psi$  

E-Print Network (OSTI)

The two-photon transition $\\psi' \\to \\gamma\\gamma J/\\psi$ is studied in a sample of 106 million $\\psi'$ decays collected by the BESIII detector. The branching fraction is measured to be $(3.3\\pm0.6(\\unit{stat})^{+0.8}_{-1.1}(\\unit{syst})) \\times10^{-4}$ using $J/\\psi \\to e^+e^-$ and $J/\\psi \\to \\mu^+\\mu^-$decays. This work represents the first measurement of a two-photon transition among charmonium states. The orientation of the $\\psi'$ decay plane and the $J/\\psi$ polarization in this decay are also studied. In addition, the product branching fractions of sequential $E1$ transitions $\\psi'\\to\\gamma\\chi_{cJ}$, $\\chi_{cJ}\\to\\gamma J/\\psi (J=0,1,2)$ are reported.

Ablikim, M; Ambrose, D J; An, F F; An, Q; An, Z H; Bai, J Z; Ferroli, R B; Ban, Y; Becker, J; Berger, N; Bertani, M B; Bian, J M; Boger, E; Bondarenko, O; Boyko, I; Briere, R A; Bytev, V; Cai, X; Calcaterra, A C; Cao, G F; Chang, J F; Chelkov, G; Chen, G; Chen, H S; Chen, J C; Chen, M L; Chen, S J; Chen, Y; Chen, Y B; Cheng, H P; Chu, Y P; Cronin-Hennessy, D; Dai, H L; Dai, J P; Dedovich, D; Deng, Z Y; Denig, A; Denysenko, I; Destefanis, M; Ding, W M; Ding, Y; Dong, L Y; Dong, M Y; Du, S X; Fang, J; Fang, S S; Fava, L; Feldbauer, F; Feng, C Q; Fu, C D; Fu, J L; Gao, Y; Geng, C; Goetzen, K; Gong, W X; Gradl, W; Greco, M; Gu, M H; Gu, Y T; Guan, Y H; Guo, A Q; Guo, L B; Guo, Y P; Han, Y L; Hao, X Q; Harris, F A; He, K L; He, M; He, Z Y; Held, T; Heng, Y K; Hou, Z L; Hu, H M; Hu, J F; Hu, T; Huang, B; Huang, G M; Huang, J S; Huang, X T; Huang, Y P; Hussain, T; Ji, C S; Ji, Q; Ji, X B; Ji, X L; Jia, L K; Jiang, L L; Jiang, X S; Jiao, J B; Jiao, Z; Jin, D P; Jin, S; Jing, F F; Kalantar-Nayestanaki, N; Kavatsyuk, M; Kuehn, W; Lai, W; Lange, J S; Leung, J K C; Li, C H; Li, Cheng; Li, Cui; Li, D M; Li, F; Li, G; Li, H B; Li, J C; Li, K; Li, Lei; Li, N B; Li, Q J; Li, S L; Li, W D; Li, W G; Li, X L; Li, X N; Li, X Q; Li, X R; Li, Z B; Liang, H; Liang, Y F; Liang, Y T; Liao, G R; Liao, X T; Liu, B J; Liu, B J; Liu, C L; Liu, C X; Liu, C Y; Liu, F H; Liu, Fang; Liu, Feng; Liu, H; Liu, H B; Liu, H H; Liu, H M; Liu, H W; Liu, J P; Liu, Kun; Liu, Kai; Liu, K Y; Liu, P L; Liu, S B; Liu, X; Liu, X H; Liu, Y B; Liu, Y; Liu, Z A; Liu, Zhiqiang; Liu, Zhiqing; Loehner, H; Lu, G R; Lu, H J; Lu, J G; Lu, Q W; Lu, X R; Lu, Y P; Luo, C L; Luo, M X; Luo, T; Luo, X L; Lv, M; Ma, C L; Ma, F C; Ma, H L; Ma, Q M; Ma, S; Ma, T; Ma, X Y; Ma, Y; Maas, F E; Maggiora, M; Malik, Q A; Mao, H; Mao, Y J; Mao, Z P; Messchendorp, J G; Min, J; Min, T J; Mitchell, R E; Mo, X H; Morales, C Morales; Motzko, C; Muchnoi, N Yu; Nefedov, Y; Nicholson, C; Nikolaev, I B; Ning, Z; Olsen, S L; Ouyang, Q; Pacetti, S P; Park, J W; Pelizaeus, M; Peters, K; Ping, J L; Ping, R G; Poling, R; Prencipe, E; Pun, C S J; Qi, M; Qian, S; Qiao, C F; Qin, X S; Qin, Y; Qin, Z H; Qiu, J F; Rashid, K H; Rong, G; Ruan, X D; Sarantsev, A; Schulze, J; Shao, M; Shen, C P; Shen, X Y; Sheng, H Y; Shepherd, M R; Song, X Y; Spataro, S; Spruck, B; Sun, D H; Sun, G X; Sun, J F; Sun, S S; Sun, X D; Sun, Y J; Sun, Y Z; Sun, Z J; Sun, Z T; Tang, C J; Tang, X; Thorndike, E H; Tian, H L; Toth, D; Ulrich, M U; Varner, G S; Wang, B; Wang, B Q; Wang, K; Wang, L L; Wang, L S; Wang, M; Wang, P; Wang, P L; Wang, Q; Wang, Q J; Wang, S G; Wang, X F; Wang, X L; Wang, Y D; Wang, Y F; Wang, Y Q; Wang, Z; Wang, Z G; Wang, Z Y; Wei, D H; Weidenkaff, P; Wen, Q G; Wen, S P; Werner, M W; Wiedner, U; Wu, L H; Wu, N; Wu, S X; Wu, W; Wu, Z; Xia, L G; Xiao, Z J; Xie, Y G; Xiu, Q L; Xu, G F; Xu, G M; Xu, H; Xu, Q J; Xu, X P; Xu, Y; Xu, Z R; Xue, F; Xue, Z; Yan, L; Yan, W B; Yan, Y H; Yang, H X; Yang, T; Yang, Y; Yang, Y X; Ye, H; Ye, M; Ye, M H; Yu, B X; Yu, C X; Yu, J S; Yu, S P; Yuan, C Z; Yuan, W L; Yuan, Y; Zafar, A A; Zallo, A Z; Zeng, Y; Zhang, B X; Zhang, B Y; Zhang, C C; Zhang, D H; Zhang, H H; Zhang, H Y; Zhang, J; Zhang, J G; Zhang, J Q; Zhang, J W; Zhang, J Y; Zhang, J Z; Zhang, L; Zhang, S H; Zhang, T R; Zhang, X J; Zhang, X Y; Zhang, Y; Zhang, Y H; Zhang, Y S; Zhang, Z P; Zhang, Z Y; Zhao, G; Zhao, H S; Zhao, J W; Zhao, K X; Zhao, Lei; Zhao, Ling; Zhao, M G; Zhao, Q; Zhao, S J; Zhao, T C; Zhao, X H; Zhao, Y B; Zhao, Z G; Zhemchugov, A; Zheng, B; Zheng, J P; Zheng, Y H; Zheng, Z P; Zhong, B; Zhong, J; Zhou, L; Zhou, X K; Zhou, X R; Zhu, C; Zhu, K; Zhu, K J; Zhu, S H; Zhu, X L; Zhu, X W; Zhu, Y M; Zhu, Y S; Zhu, Z A; Zhuang, J; Zou, B S; Zou, J H; Zuo, J X

2012-01-01T23:59:59.000Z

44

Three dimensional silicon photonic crystals fabricated by two photon phase mask lithography.  

SciTech Connect

We describe the fabrication of silicon three dimensional photonic crystals using polymer templates defined by a single step, two-photon exposure through a layer of photopolymer with relief molded on its surface. The resulting crystals exhibit high structural quality over large areas, displaying geometries consistent with calculation. Spectroscopic measurements of transmission and reflection through the silicon and polymer structures reveal excellent optical properties, approaching properties predicted by simulations that assume ideal layouts.

Wiltzius, P. (University of Illinois, Urbana-Champaign, Illinois); Braun, P. V. (University of Illinois, Urbana-Champaign, Illinois); Liao, H. (University of Illinois, Urbana-Champaign, Illinois); Brzezinski, A. (University of Illinois, Urbana-Champaign, Illinois); Chen, Y. C. (University of Illinois, Urbana-Champaign, Illinois); Nelson, E. (University of Illinois, Urbana-Champaign, Illinois); Shir, D. (University of Illinois, Urbana-Champaign, Illinois); Rogers, J. A. (University of Illinois, Urbana-Champaign, Illinois); Bogart, Katherine Huderle Andersen

2008-08-01T23:59:59.000Z

45

Transverse target spin asymmetry in inclusive DIS with two-photon exchange  

SciTech Connect

We study the transverse target spin dependence of the cross section for the inclusive electron-nucleon scattering with unpolarized beam. Such dependence is absent in the one-photon exchange approximation (Christ-Lee theorem) and arises only in higher orders of the QED expansion, from the interference of one-photon and absorptive two-photon exchange amplitudes as well as from real photon emission (bremsstrahlung). We demonstrate that the transverse spin-dependent two-photon exchange cross section is free of QED infrared and collinear divergences. We argue that in DIS kinematics the transverse spin dependence should be governed by a "parton-like" mechanism in which the two-photon exchange couples mainly to a single quark. We calculate the normal spin asymmetry in an approximation where the dominant contribution arises from quark helicity flip due to interactions with non-perturbative vacuum fields (constituent quark picture) and is proportional to the quark transversity distribution in the nucleon. Such helicity-flip processes are not significantly Sudakov-suppressed if the infrared scale for gluon emission in the photon-quark subprocess is of the order of the chiral symmetry breaking scale, mu^2_chiral>>Lambda^2_QCD. We estimate the asymmetry in the kinematics of the planned Jefferson Lab Hall A experiment to be of the order 10^-4, with different sign for proton and neutron. We also comment on the spin dependence in the limit of soft high-energy scattering.

Andrei Afanasev; Mark Strikman; Christian Weiss

2007-09-06T23:59:59.000Z

46

Calculation of the two-photon decay rates of hydrogen-like ions by using B-polynomials  

E-Print Network (OSTI)

A new approach is laid out to investigate the two photon atomic transitions. It is based on application of the finite basis solutions constructed from the Bernstein Polynomial (B-Polynomial) sets. We show that such an approach provides a very promising route for the relativistic second- (and even higher-order) calculations since it allows for analytical evaluation of the involved matrices elements. In order to illustrate possible applications of the method and to verify its accuracy, detailed calculations are performed for the 2s_{1/2}-1s_{1/2} transition in neutral hydrogen and hydrogen-like ions, and are compared with the theoretical predictions based on the well-established B-spline-basis-set approach.

P. Amaro; A. Surzhykov; F. Parente; P. Indelicato; J. P. Santos

2011-04-25T23:59:59.000Z

47

Polarization dependence of two-photon transition intensities in rare-earth doped crystals  

SciTech Connect

A polarization dependence technique has been developed as a tool to investigate phonon scattering (PS), electronic Raman scattering (ERS), and two-photon absorption (TPA) transition intensities in vanadate and phosphate crystals. A general theory for the polarization dependence (PD) of two-photon transition intensities has been given. Expressions for the polarization dependent behavior of two-photon transition intensities have been tabulated for the 32 crystallographic point groups. When the wavefunctions for the initial and final states of a rare-earth doped in crystals are known, explicit PD expressions with no unknown parameters can be obtained. A spectroscopic method for measuring and interpreting phonon and ERS intensities has been developed to study PrVO{sub 4}, NdVO{sub 4}, ErVO{sub 4}, and TmVO{sub 4} crystals. Relative phonon intensities with the polarization of the incident and scattered light arbitrarily varied were accurately predicted and subsequently used for alignment and calibration in ERS measurements in these systems for the first time. Since ERS and PS intensities generally follow different polarization curves as a function of polar angles, the two can be uniquely identified by comparing their respective polarization behavior. The most crucial application of the technique in ERS spectroscopy is the establishment of a stringent test for the Axe theory. For the first time, the F{sub 1}/F{sub 2} ratio extracted from the experimental fits of the ERS intensities were compared with those predicted by theories which include both the second- and third-order contributions. Relatively good agreement between the fitted values of F{sub 1}/F{sub 2} and the predicted values using the second-order theory has been found.

Le Nguyen, An-Dien

1996-05-01T23:59:59.000Z

48

Decoding sequential vs non-sequential two-photon double ionizationof helium using nuclear recoil  

SciTech Connect

Above 54.4 eV, two-photon double ionization of helium isdominated by a sequential absorption process, producing characteristicbehavior in the single and triple differential cross sections. We showthat the signature of this process is visible in the nuclear recoil crosssection, integrated over all energy sharings of the ejected electrons,even below the threshold for the sequential process. Since nuclear recoilmomentum imaging does not require coincident photoelectron measurement,the predicted images present a viable target for future experiments withnew short-pulse VUV and soft X-ray sources.

Horner, Daniel A.; Rescigno, Thomas N.; McCurdy, C. William

2008-01-07T23:59:59.000Z

49

Triple Differential Cross sections and Nuclear Recoil in Two-Photon Double Ionization of Helium  

SciTech Connect

Triple differential cross sections (TDCS) for two-photon double ionization of helium are calculated using the method of exterior complex scaling both above and below the threshold for sequential ionization (54.4 eV). It is found that sequential ionization produces characteristic behavior in the TDCS that identifies that process when it is in competition with nonsequential ionization. Moreover we see the signature in the TDCS and nuclear recoil cross sections of"virtual sequential ionization" below the threshold for the sequential process.

Horner, Daniel A.; McCurdy, C. William; Rescigno, Thomas N

2008-04-29T23:59:59.000Z

50

Watching Electrons Transfer from Metals to Insulators using Two Photon Photoemission  

SciTech Connect

Ultrafast angle-resolved two photon photoemission was used to study the dynamics and interfacial band structure of ultrathin films adsorbed onto Ag(111). Studies focused on the image potential state (IPS) in each system as a probe for measuring changes in electronic behavior in differing environments. The energetics and dynamics of the IPS at the toluene/Ag(111) interface are strongly dependent upon coverage. For a single monolayer, the first IPS is bound by 0.81 eV below the vacuum level and has a lifetime of 50 femtoseconds (fs). Further adsorption of toluene creates islands of toluene with an exposed wetting layer underneath. The IPS is then split into two peaks, one corresponding to the islands and one corresponding to the monolayer. The wetting layer IPS shows the same dynamics as the monolayer, while the lifetime of the islands increases exponentially with increasing thickness. Furthermore, the island IPS transitions from delocalized to localized within 500 fs, and electrons with larger parallel momenta decay much faster. Attempts were made using a stochastic model to extract the rates of localization and intraband cooling at differing momenta. In sexithiophene (6T) and dihexyl-sexithiophene (DH6T), the IPS was used as a probe to see if the nuclear motion of spectating side chains can interfere with molecular conduction. The energy and band mass of the IPS was measured for 6T and two geometries of DH6T on Ag(111). Electrons injected into the thicker coverages of DH6T grew exponentially heavier until they were completely localized by 230 fs, while those injected into 6T remained nearly free electron like. Based off of lifetime arguments and the density of defects, the most likely cause for the mass enhancement of the IPS in this system is small polaron formation caused by coupling of the electron to vibrations of the alkyl substituents. The energetic relaxation of the molecular adsorbate was also measured to be 20 meV/100 fs for the DH6T, and 0 meV/100 fs for the 6T. This relaxation is consistent with the localization of the charge creating a barrier for it moving from one lattice site to a neighboring one. Finally, the IPS was used to study the evolution of the surface band gap at the Mg/Ag(111) interface. The Mg(0001) surface band gap lies 1.6 eV below the Fermi level, and consequently shows no peak in the projected density of states for the IPS. A method for creating layer by layer growth of Mg on Ag(111) was determined using Auger Spectroscopy and low energy electron diffraction. By monitoring the decay of the intensity of the IPS versus coverage, it was determined that four layers of magnesium on Ag(111) is sufficient to completely eliminate the surface band gap

Johns, James E.

2010-05-01T23:59:59.000Z

51

Two-photon double ionization of the helium atom by ultrashort pulses  

SciTech Connect

Two-photon double ionization of the helium atom was the subject of early experiments at FLASH and will be the subject of future benchmark measurements of the associated electron angular and energy distributions. As the photon energy of a single femtosecond pulse is raised from the threshold for two-photon double ionization at 39.5 eV to beyond the sequential ionization threshold at 54.4 eV, the electron ejection dynamics change from the highly correlated motion associated with nonsequential absorption to the much less correlated sequential ionization process. The signatures of both processes have been predicted in accurate \\textit{ab initio} calculations of the joint angular and energy distributions of the electrons, and those predictions contain some surprises. The dominant terms that contribute to sequential ionization make their presence apparent several eV below that threshold. In two-color pump probe experiments with short pulses whose central frequencies require that the sequential ionization process necessarily dominates, a two-electron interference pattern emerges that depends on the pulse delay and the spin state of the atom.

Palacios, Alicia; Horner, Daniel A; Rescigno, Thomas N; McCurdy, C William

2010-05-14T23:59:59.000Z

52

Beyond the born approximation: Measuring the two-photon exchange effect at CLAS  

Science Conference Proceedings (OSTI)

Recent results from experiments at Jefferson Laboratory, Newport News VA, which measured the ratio of the electric to magnetic form factors of the proton, G{sub E}/G{sub M}, have forced us to reexamine the single photon exchange approximation in lepton-proton elastic scattering. Discrepancies between the ratio obtained via the time-tested Rosenbluth separation method and newer polarization transfer measurements, which differ by as much as a factor of three, may be resolved by considering the effect of two photon exchange (TPE) processes. The CLAS TPE experiment at Jefferson Laboratory, will determine the effect of two-photon exchange in elastic lepton-proton scattering by precisely measuring the ratio of positron-proton to electron-proton elastic cross sections over a large kinematic range (0.1 CEBAF), onto a set of radiators and converters to produce simultaneous and identical beams of electron and positrons which collide with our proton target. Acceptance and efficiency concerns are minimized by only considering the ratios of the elastic cross sections and by switching polarity of magnets in the beamline and the spectrometer. Guided by the results of a short 2006 test run and extensive GEANT based modeling, new shielding and beamline components were designed to maximize luminosity. We took data from November 2010 - February 2011. The unique experimental design and challenges of the TPE experiment and the current analysis status will be presented.

Robert Paul Bennett

2012-04-01T23:59:59.000Z

53

In-vivo two-photon imaging of the honey bee antennal lobe  

E-Print Network (OSTI)

Due to the honey bee's importance as a simple neural model, there is a great need for new functional imaging modalities. Herein we report on the use of two-photon microscopy for in-vivo functional and morphological imaging of the honey bee's olfactory system focusing on its primary centers, the antennal lobes (ALs). Our imaging platform allows for simultaneously obtaining both morphological measurements of the AL and in-vivo calcium recording of neural activities. By applying external odor stimuli to the bee's antennas, we were able to record the characteristic odor response maps. Compared to previous works where conventional fluorescence microscopy is used, our approach offers all the typical advantages of multi-photon imaging, providing substantial enhancement in both spatial and temporal resolutions while minimizing photo-damages and autofluorescence contribution with a four-fold improvement in the functional signal. Moreover, the multi-photon associated extended penetration depth allows for functional ima...

Haase, Albrecht; Trona, Federica; Anfora, Gianfranco; Vallortigara, Giorgio; Antolini, Renzo; Vinegoni, Claudio

2010-01-01T23:59:59.000Z

54

Implications of the LHC two-photon signal for two-Higgs-doublet models  

SciTech Connect

We study the implications for Two Higgs Doublet Models of the recent announcement at the LHC giving a tantalizing hint for a Higgs boson of mass 125 GeV decaying into two photons. We require that the experimental result be within a factor of two of the theoretical Standard Model prediction, and analyze the type I and type II models as well as the lepton-specific and flipped models, subject to this requirement. It is assumed that there is no new physics other than two Higgs doublets. In all of the models, we display the allowed region of parameter space taking the recent LHC announcement at face value, and we analyze the W{sup +}W{sup -}, ZZ, {bar b}b and {tau}{sup +}{tau}{sup -} expectations in these allowed regions. Throughout the entire range of parameter space allowed by the {gamma}{gamma} constraint, the number of events for Higgs decays into WW, ZZ and b{bar b} are not changed from the Standard Model by more than a factor of two. In contrast, in the Lepton Specific model, decays to {tau}{sup +}{tau}{sup -} are very sensitive across the entire {gamma}{gamma}-allowed region.

P. M. Ferreira, Rui Santos, Marc Sher, Joao P. Silva

2012-04-01T23:59:59.000Z

55

Collimated Blue and Infrared Beams Generated by Two-Photon Excitation in Rb Vapor  

E-Print Network (OSTI)

Utilizing two-photon excitation in hot Rb vapor we demonstrate the generation of collimated optical fields at 420 nm and 1324 nm. Input laser beams at 780 nm and 776 nm enter a heated Rb vapor cell collinear and circularly polarized, driving Rb atoms to the $5D_{5/2}$ state. Under phase-matching conditions coherence among the $5S_{1/2}\\rightarrow 5P_{3/2}\\rightarrow 5D_{5/2} \\rightarrow 6P_{3/2}$ transitions produces a blue (420 nm) beam by four-wave mixing. We also observe a forward and backward propagating IR (1324 nm) beam, due to cascading decays through the $6S_{1/2}\\rightarrow 5P_{1/2}$ states. Power saturation of the generated beams is investigated by scaling the input powers to greater than 200 mW, resulting in a coherent blue beam of 9.1 mW power, almost an order of magnitude larger than previously achieved. We measure the dependences of both beams in relation to the Rb density, the frequency detuning between Rb ground state hyperfine levels, and the input laser intensities.

Sell, J F; DePaola, B D; Knize, R J

2013-01-01T23:59:59.000Z

56

One-and two-photon photoactivation of a paGFP-fusion protein in live Drosophila embryos  

E-Print Network (OSTI)

constructed a photoactivatable Drosophila his- tone 2 A variant green fluorescent fusion protein (H2AvD- pa of multiple fluorescent loci. This report constitutes the first demon- stration of two-photon activation of pa Biochemical Societies. Published by Elsevier B.V. All rights reserved. Keywords: Green fluorescent protein

Rieger, Bernd

57

Simultaneous control of emission localization and two-photon absorption efficiency in dissymmetrical chromophores  

Science Conference Proceedings (OSTI)

The aim of the present work is to demonstrate that combined spectral tuning of fluorescence and two-photon absorption (TPA) properties of multipolar chromophores can be achieved by introduction of slight electronic chemical dissymmetry. In that perspective, two novel series of structurally related chromophores have been designed and studied: a first series based on rod-like quadrupolar chromophores bearing different electron-donating (D) end groups and a second series based on three-branched octupolar chromophores built from a trigonal donating moiety and bearing various acceptor (A) peripheral groups. The influence of the electronic dissymmetry is investigated by combined experimental and theoretical studies of the linear and nonlinear optical properties of dissymmetric chromophores compared to their symmetrical counterparts. In both types of systems (i.e. quadrupoles and octupoles) experiments and theory reveal that excitation is essentially delocalized and that excitation involves synchronized charge redistribution between the different D and A moieties within the multipolar structure (i.e. concerted intramolecular charge transfer). In contrast, the emission stems only from a particular dipolar subunit bearing the strongest D or A moieties due to fast excitation localization after excitation prior to emission. Hence control of emission characteristics (polarization and emission spectrum) in addition to localization can be achieved by controlled introduction of electronic dissymmetry (i.e. replacement of one of the D or A end-groups by a slightly stronger D{prime} or A{prime} units). Interestingly dissymmetrical functionalization of both quadrupolar and octupolar compounds does not lead to significant loss in TPA responses and can even be beneficial due to the spectral broadening and peak position tuning that it allows. This study thus reveals an original molecular engineering route strategy allowing major TPA enhancement in multipolar structures due to concerted multidimensional ICT while providing for spatial control of emission localization. Such route could be extended to more intricate (dendritic) and multipolar systems (3D).

Tretiak, Sergei [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

58

Two-photon double ionization of H2 at 30 eV using Exterior Complex Scaling  

DOE Green Energy (OSTI)

Calculations of fully differential cross sections for two-photon double ionization of the hydrogen molecule with photons of 30 eV are reported. The results have been obtained by using the method of exterior complex scaling, which allows one to construct essentially exact wave functions that describe thedouble continuum on a large, but finite, volume. The calculated cross sections are compared with those previously obtained by Colgan et al., and discrepancies are found for specific molecular orientations and electron ejection directions.

Morales, Felipe; Martin, Fernando; Horner, Daniel; Rescigno, Thomas N.; McCurdy, C. William

2009-01-20T23:59:59.000Z

59

Grid-based methods for diatomic quantum scattering problems II: Time-dependent treatment of single- and two-photon ionization of H2+  

SciTech Connect

The time-dependent Schr\\"odinger equation for H2+ in a time-varying electromagnetic field is solved in the fixed-nuclei approximation using a previously developed finite-element/ discrete variable representation in prolate spheroidal coordinates. Amplitudes for single- and two-photon ionization are obtained using the method of exterior complex scaling to effectively propagate the field-free solutions from the end of the radiation pulse to infinite times. Cross sections are presented for one-and two-photon ionization for both parallel and perpendicular polarization of the photon field, as well as photoelectron angular distributions for two-photon ionization.

Rescigno, Thomas N.; Tao, L.; McCurdy, C.W.

2009-04-20T23:59:59.000Z

60

Two-photon double ionization of H2 at 30 eV using exterior complex scaling  

DOE Green Energy (OSTI)

Calculations of fully differential cross sections for two-photon double ionization of the hydrogen molecule with photons of 30 eV are reported. The results have been obtained by using the method of exterior complex scaling, which allows one to construct essentially exact wave functions that describe the double continuum on a large, but finite, volume. The calculated cross sections are compared with those previously obtained by Colgan et al [1], and discrepancies are found for specific molecular orientations and electron ejection directions.

Horner, Daniel A [Los Alamos National Laboratory; Morales, F [UNIV AUTONOMA DE MADRID; Martin, F [UNIV AUTONOMA DE MADRID; Rescigno, T N [LBNL; Mccurdy, C W [LBNL

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "two-photon channel shows" from the National Library of EnergyBeta (NLEBeta).
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61

Post-selective two-photon interference from a continuous non-classical stream of photons emitted by a quantum dot  

E-Print Network (OSTI)

We report an electrically driven semiconductor single photon source capable of emitting photons with a coherence time of up to 400 ps under fixed bias. It is shown that increasing the injection current causes the coherence time to reduce and this effect is well explained by the fast modulation of a fluctuating environment. Hong-Ou-Mandel type two-photon interference using a Mach-Zehnder interferometer is demonstrated using this source to test the indistinguishability of individual photons by post-selecting events where two photons collide at a beamsplitter. Finally, we consider how improvements in our detection system can be used to achieve a higher interference visibility.

R. B. Patel; A. J. Bennett; K. Cooper; P. Atkinson; C. A. Nicoll; D. A. Ritchie; A. J. Shields

2008-04-11T23:59:59.000Z

62

Demonstration of a novel technique to measure two-photon exchange effects in elastic $e^\\pm p$ scattering  

E-Print Network (OSTI)

The discrepancy between proton electromagnetic form factors extracted using unpolarized and polarized scattering data is believed to be a consequence of two-photon exchange (TPE) effects. However, the calculations of TPE corrections have significant model dependence, and there is limited direct experimental evidence for such corrections. We present the results of a new experimental technique for making direct $e^\\pm p$ comparisons, which has the potential to make precise measurements over a broad range in $Q^2$ and scattering angles. We use the Jefferson Lab electron beam and the Hall B photon tagger to generate a clean but untagged photon beam. The photon beam impinges on a converter foil to generate a mixed beam of electrons, positrons, and photons. A chicane is used to separate and recombine the electron and positron beams while the photon beam is stopped by a photon blocker. This provides a combined electron and positron beam, with energies from 0.5 to 3.2 GeV, which impinges on a liquid hydrogen target. The large acceptance CLAS detector is used to identify and reconstruct elastic scattering events, determining both the initial lepton energy and the sign of the scattered lepton. The data were collected in two days with a primary electron beam energy of only 3.3 GeV, limiting the data from this run to smaller values of $Q^2$ and scattering angle. Nonetheless, this measurement yields a data sample for $e^\\pm p$ with statistics comparable to those of the best previous measurements. We have shown that we can cleanly identify elastic scattering events and correct for the difference in acceptance for electron and positron scattering. The final ratio of positron to electron scattering: $R=1.027\\pm0.005\\pm0.05$ for $=0.206$ GeV$^2$ and $0.830\\leq \\epsilon\\leq 0.943$.

M. Moteabbed; M. Niroula; B. A. Raue; L. B. Weinstein; D. Adikaram; J. Arrington; W. K. Brooks; J. Lachniet; Dipak Rimal; M. Ungaro; K. P. Adhikari; M. Aghasyan; M. J. Amaryan; S. Anefalos Pereira; H. Avakian; J. Ball; N. A. Baltzell; M. Battaglieri; V. Batourine; I. Bedlinskiy; R. P. Bennett; A. S. Biselli; J. Bono; S. Boiarinov; W. J. Briscoe; V. D. Burkert; D. S. Carman; A. Celentano; S. Chandavar; P. L. Cole; P. Collins; M. Contalbrigo; O. Cortes; V. Crede; A. D'Angelo; N. Dashyan; R. De Vita; E. De Sanctis; A. Deur; C. Djalali; D. Doughty; R. Dupre; H. Egiyan; L. El Fassi; P. Eugenio; G. Fedotov; S. Fegan; R. Fersch; J. A. Fleming; N. Gevorgyan; G. P. Gilfoyle; K. L. Giovanetti; F. X. Girod; J. T. Goetz; W. Gohn; E. Golovatch; R. W. Gothe; K. A. Griffioen; M. Guidal; N. Guler; L. Guo; K. Hafidi; H. Hakobyan; C. Hanretty; N. Harrison; D. Heddle; K. Hicks; D. Ho; M. Holtrop; C. E. Hyde; Y. Ilieva; D. G. Ireland; B. S. Ishkhanov; E. L. Isupov; H. S. Jo; K. Joo; D. Keller; M. Khandaker; A. Kim; F. J. Klein; S. Koirala; A. Kubarovsky; V. Kubarovsky; S. E. Kuhn; S. V. Kuleshov; S. Lewis; H. Y. Lu; M. MacCormick; I . J . D. MacGregor; D. Martinez; M. Mayer; B. McKinnon; T. Mineeva; M. Mirazita; V. Mokeev; R. A. Montgomery; K. Moriya; H. Moutarde; E. Munevar; C. Munoz Camacho; P. Nadel-Turonski; R. Nasseripour; S. Niccolai; G. Niculescu; I. Niculescu; M. Osipenko; A. I. Ostrovidov; L. L. Pappalardo; R. Paremuzyan; K. Park; S. Park; E. Phelps; J. J. Phillips; S. Pisano; O. Pogorelko; S. Pozdniakov; J. W. Price; S. Procureur; D. Protopopescu; A. J. R. Puckett; M. Ripani; G. Rosner; P. Rossi; F. Sabatié; M. S. Saini; C. Salgado; D. Schott; R. A. Schumacher; E. Seder; H. Seraydaryan; Y. G. Sharabian; E. S. Smith; G. D. Smith; D. I. Sober; D. Sokhan; S. Stepanyan; S. Strauch; W. Tang; C. E. Taylor; Ye Tian; S. Tkachenko; H. Voskanyan; E. Voutier; N. K. Walford; M. H. Wood; N. Zachariou; L. Zana; J. Zhang; Z. W. Zhao; I. Zonta

2013-06-10T23:59:59.000Z

63

Two-photon widths of the $\\chi_{c0, 2}$ states and helicity analysis for $\\chi_{c2}\\ar\\gamma\\gamma$}  

E-Print Network (OSTI)

Based on a data sample of 106 M $\\psi^{\\prime}$ events collected with the BESIII detector, the decays $\\psi^{\\prime}\\ar\\gamma\\chi_{c0, 2}$,$\\chi_{c0, 2}\\ar\\gamma\\gamma$ are studied to determine the two-photon widths of the $\\chi_{c0, 2}$ states. The two-photon decay branching fractions are determined to be ${\\cal B}(\\chi_{c0}\\ar\\gamma\\gamma) = (2.24\\pm 0.19\\pm 0.12\\pm 0.08)\\times 10^{-4}$ and ${\\cal B}(\\chi_{c2}\\ar\\gamma\\gamma) = (3.21\\pm 0.18\\pm 0.17\\pm 0.13)\\times 10^{-4}$. From these, the two-photon widths are determined to be $\\Gamma_{\\gamma \\gamma}(\\chi_{c0}) = (2.33\\pm0.20\\pm0.13\\pm0.17)$ keV, $\\Gamma_{\\gamma \\gamma}(\\chi_{c2}) = (0.63\\pm0.04\\pm0.04\\pm0.04)$ keV, and $\\cal R$ $=\\Gamma_{\\gamma \\gamma}(\\chi_{c2})/\\Gamma_{\\gamma \\gamma}(\\chi_{c0})=0.271\\pm 0.029\\pm 0.013\\pm 0.027$, where the uncertainties are statistical, systematic, and those from the PDG ${\\cal B}(\\psi^{\\prime}\\ar\\gamma\\chi_{c0,2})$ and $\\Gamma(\\chi_{c0,2})$ errors, respectively. The ratio of the two-photon widths for helicity $\\lambda=0...

Ablikim, M; Ambrose, D J; An, F F; An, Q; An, Z H; Bai, J Z; Ferroli, R B; Ban, Y; Becker, J; Berger, N; Bertani, M B; Bian, J M; Boger, E; Bondarenko, O; Boyko, I; Briere, R A; Bytev, V; Cai, X; Calcaterra, A C; Cao, G F; Chang, J F; Chelkov, G; Chen, G; Chen, H S; Chen, J C; Chen, M L; Chen, S J; Chen, Y; Chen, Y B; Cheng, H P; Chu, Y P; Cronin-Hennessy, D; Dai, H L; Dai, J P; Dedovich, D; Deng, Z Y; Denig, A; Denysenko, I; Destefanis, M; Ding, W M; Ding, Y; Dong, L Y; Dong, M Y; Du, S X; Fang, J; Fang, S S; Fava, L; Feldbauer, F; Feng, C Q; Fu, C D; Fu, J L; Gao, Y; Geng, C; Goetzen, K; Gong, W X; Gradl, W; Greco, M; Gu, M H; Gu, Y T; Guan, Y H; Guo, A Q; Guo, L B; Guo, Y P; Han, Y L; Hao, X Q; Harris, F A; He, K L; He, M; He, Z Y; Held, T; Heng, Y K; Hou, Z L; Hu, H M; Hu, J F; Hu, T; Huang, B; Huang, G M; Huang, J S; Huang, X T; Huang, Y P; Hussain, T; Ji, C S; Ji, Q; Ji, X B; Ji, X L; Jia, L K; Jiang, L L; Jiang, X S; Jiao, J B; Jiao, Z; Jin, D P; Jin, S; Jing, F F; Kalantar-Nayestanaki, N; Kavatsyuk, M; Kuehn, W; Lai, W; Lange, J S; Leung, J K C; Li, C H; Li, Cheng; Li, Cui; Li, D M; Li, F; Li, G; Li, H B; Li, J C; Li, K; Li, Lei; Li, N B; Li, Q J; Li, S L; Li, W D; Li, W G; Li, X L; Li, X N; Li, X Q; Li, X R; Li, Z B; Liang, H; Liang, Y F; Liang, Y T; Liao, G R; Liao, X T; Liu, B J; Liu, B J; Liu, C L; Liu, C X; Liu, C Y; Liu, F H; Liu, Fang; Liu, Feng; Liu, H; Liu, H B; Liu, H H; Liu, H M; Liu, H W; Liu, J P; Liu, Kun; Liu, Kai; Liu, K Y; Liu, P L; Liu, S B; Liu, X; Liu, X H; Liu, Y B; Liu, Y; Liu, Z A; Liu, Zhiqiang; Liu, Zhiqing; Loehner, H; Lu, G R; Lu, H J; Lu, J G; Lu, Q W; Lu, X R; Lu, Y P; Luo, C L; Luo, M X; Luo, T; Luo, X L; Lv, M; Ma, C L; Ma, F C; Ma, H L; Ma, Q M; Ma, S; Ma, T; Ma, X Y; Ma, Y; Maas, F E; Maggiora, M; Malik, Q A; Mao, H; Mao, Y J; Mao, Z P; Messchendorp, J G; Min, J; Min, T J; Mitchell, R E; Mo, X H; Morales, C Morales; Motzko, C; Muchnoi, N Yu; Nefedov, Y; Nicholson, C; Nikolaev, I B; Ning, Z; Olsen, S L; Ouyang, Q; Pacetti, S P; Park, J W; Pelizaeus, M; Peters, K; Ping, J L; Ping, R G; Poling, R; Prencipe, E; Pun, C S J; Qi, M; Qian, S; Qiao, C F; Qin, X S; Qin, Y; Qin, Z H; Qiu, J F; Rashid, K H; Rong, G; Ruan, X D; Sarantsev, A; Schulze, J; Shao, M; Shen, C P; Shen, X Y; Sheng, H Y; Shepherd, M R; Song, X Y; Spataro, S; Spruck, B; Sun, D H; Sun, G X; Sun, J F; Sun, S S; Sun, X D; Sun, Y J; Sun, Y Z; Sun, Z J; Sun, Z T; Tang, C J; Tang, X; Thorndike, E H; Tian, H L; Toth, D; Ulrich, M U; Varner, G S; Wang, B; Wang, B Q; Wang, K; Wang, L L; Wang, L S; Wang, M; Wang, P; Wang, P L; Wang, Q; Wang, Q J; Wang, S G; Wang, X F; Wang, X L; Wang, Y D; Wang, Y F; Wang, Y Q; Wang, Z; Wang, Z G; Wang, Z Y; Wei, D H; Weidenkaff, P; Wen, Q G; Wen, S P; Werner, M W; Wiedner, U; Wu, L H; Wu, N; Wu, S X; Wu, W; Wu, Z; Xia, L G; Xiao, Z J; Xie, Y G; Xiu, Q L; Xu, G F; Xu, G M; Xu, H; Xu, Q J; Xu, X P; Xu, Y; Xu, Z R; Xue, F; Xue, Z; Yan, L; Yan, W B; Yan, Y H; Yang, H X; Yang, T; Yang, Y; Yang, Y X; Ye, H; Ye, M; Ye, M H; Yu, B X; Yu, C X; Yu, J S; Yu, S P; Yuan, C Z; Yuan, W L; Yuan, Y; Zafar, A A; Zallo, A Z; Zeng, Y; Zhang, B X; Zhang, B Y; Zhang, C C; Zhang, D H; Zhang, H H; Zhang, H Y; Zhang, J; Zhang, J G; Zhang, J Q; Zhang, J W; Zhang, J Y; Zhang, J Z; Zhang, L; Zhang, S H; Zhang, T R; Zhang, X J; Zhang, X Y; Zhang, Y; Zhang, Y H; Zhang, Y S; Zhang, Z P; Zhang, Z Y; Zhao, G; Zhao, H S; Zhao, J W; Zhao, K X; Zhao, Lei; Zhao, Ling; Zhao, M G; Zhao, Q; Zhao, S J; Zhao, T C; Zhao, X H; Zhao, Y B; Zhao, Z G; Zhemchugov, A; Zheng, B; Zheng, J P; Zheng, Y H; Zheng, Z P; Zhong, B; Zhong, J; Zhou, L; Zhou, X K; Zhou, X R; Zhu, C; Zhu, K; Zhu, K J; Zhu, S H; Zhu, X L; Zhu, X W; Zhu, Y M; Zhu, Y S; Zhu, Z A; Zhuang, J; Zou, B S; Zou, J H; Zuo, J X

2012-01-01T23:59:59.000Z

64

Observation of eta_c(1S) and eta_c(2S) decays to K K-pi pi-pi0 in two-photon interactions  

Science Conference Proceedings (OSTI)

We study the processes {gamma}{gamma} {yields} K{sub S}{sup 0}K{sup {+-}}{pi}{sup {-+}} and {gamma}{gamma} {yields} K{sup +}K{sup -}{pi}{sup +}{pi}{sup -}{pi}{sup 0} using a data sample of 519.2 fb{sup -1} recorded by the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} collider at center-of-mass energies near the {Upsilon}(nS) (n = 2, 3, 4) resonances. We observe the {eta}{sub c}(1S), {chi}{sub c0}(1P), {chi}{sub c2}(1P), and {eta}{sub c}(2S) resonances produced in two-photon interactions and decaying to K{sup +}K{sup -}{pi}{sup +}{pi}{sup -}{pi}{sup 0}, with significances of 18.1, 5.7, 5.2, and 5.3 standard deviations (including systematic errors), respectively. We measure the {eta}{sub c}(2S) mass and width in K{sub S}{sup 0}K{sup {+-}}{pi}{sup {-+}} decays, m({eta}{sub c}(2S)) = 3638.5 {+-} 1.5 {+-} 0.8 MeV/c{sup 2} and {Lambda}({eta}{sub c}(2S)) = 13.4 {+-} 4.6 {+-} 3.2 MeV, where the first uncertainty is statistical and the second is systematic. We search for the Z(3930) resonance and find no significant signal. We also provide the two-photon width times branching fraction values for the observed resonances.

Sanchez, P.del Amo

2011-05-20T23:59:59.000Z

65

Time-resolved measurement of the quantum states of photons using two-photon interference with short-time reference pulses  

SciTech Connect

To fully utilize the energy-time degree of freedom of photons for optical quantum-information processes, it is necessary to control and characterize the temporal quantum states of the photons at extremely short time scales. For measurements of the temporal coherence of the quantum states beyond the time resolution of available detectors, two-photon interference with a photon in a short-time reference pulse may be a viable alternative. In this paper, we derive the temporal measurement operators for the bunching statistics of a single-photon input state with a photon from a weak coherent reference pulse. It is shown that the effects of the pulse shape of the reference pulse can be expressed in terms of a spectral filter selecting the bandwidth within which the measurement can be treated as an ideal projection on eigenstates of time. For full quantum tomography, temporal coherence can be determined by using superpositions of reference pulses at two different times. Moreover, energy-time entanglement can be evaluated based on the two-by-two entanglement observed in the coherences between pairs of detection times.

Ren Changliang; Hofmann, Holger F. [Graduate School of Advanced Sciences of Matter, Hiroshima University, Kagamiyama 1-3-1, Higashi Hiroshima 739-8530 (Japan) and JST, CREST, Sanbancho 5, Chiyoda ku, Tokyo 102-0075 (Japan)

2011-09-15T23:59:59.000Z

66

Citizens and Service Channels: Channel Choice and Channel Management Implications  

Science Conference Proceedings (OSTI)

The arrival of electronic channels in the 1990s has had a huge impact on governmental service delivery. The new channels have led to many new opportunities to improve public service delivery, not only in terms of citizen satisfaction, but also in cost ... Keywords: Channel Behavior, Channel Choice, Channel Usage, Multi-Channel Management, Public Service Delivery, Service Channels, e-Government

Willem Pieterson

2010-04-01T23:59:59.000Z

67

4-H Show Lamb Guide  

E-Print Network (OSTI)

This pocket guide is a reference for 4-H members who raise show lambs. The manual covers facilities and equipment needs, lamb selection, nutrition, health, management and feeding, fitting and showing.

Craddock, Frank; Stultz, Ross

1998-11-30T23:59:59.000Z

68

Photon Channelling in Foams  

E-Print Network (OSTI)

Experiments by Gittings, Bandyopadhyay, and Durian [Europhys. Lett.\\ \\textbf{65}, 414 (2004)] demonstrate that light possesses a higher probability to propagate in the liquid phase of a foam due to total reflection. The authors term this observation photon channelling which we investigate in this article theoretically. We first derive a central relation in the work of Gitting {\\em et al.} without any free parameters. It links the photon's path-length fraction $f$ in the liquid phase to the liquid fraction $\\epsilon$. We then construct two-dimensional Voronoi foams, replace the cell edges by channels to represent the liquid films and simulate photon paths according to the laws of ray optics using transmission and reflection coefficients from Fresnel's formulas. In an exact honeycomb foam, the photons show superdiffusive behavior. It becomes diffusive as soon as disorder is introduced into the foams. The dependence of the diffusion constant on channel width and refractive index is explained by a one-dimensional random-walk model. It contains a photon channelling state that is crucial for the understanding of the numerical results. At the end, we shortly comment on the observation that photon channelling only occurs in a finite range of $\\epsilon$.

Michael Schmiedeberg; MirFaez Miri; Holger Stark

2005-05-17T23:59:59.000Z

69

Quantum Capacities of Channels with small Environment  

E-Print Network (OSTI)

We investigate the quantum capacity of noisy quantum channels which can be represented by coupling a system to an effectively small environment. A capacity formula is derived for all cases where both system and environment are two-dimensional--including all extremal qubit channels. Similarly, for channels acting on higher dimensional systems we show that the capacity can be determined if the channel arises from a sufficiently small coupling to a qubit environment. Extensions to instances of channels with larger environment are provided and it is shown that bounds on the capacity with unconstrained environment can be obtained from decompositions into channels with small environment.

Michael M. Wolf; David Perez-Garcia

2006-07-11T23:59:59.000Z

70

Ion transport through cell membrane channels  

E-Print Network (OSTI)

We discuss various models of ion transport through cell membrane channels. Recent experimental data shows that sizes of ion channels are compared to those of ions and that only few ions may be simultaneously in any single channel. Theoretical description of ion transport in such channels should therefore take into account interactions between ions and between ions and channel proteins. This is not satisfied by macroscopic continuum models based on Poisson-Nernst-Planck equations. More realistic descriptions of ion transport are offered by microscopic Brownian and molecular dynamics. One should also take into account a dynamical character of the channel structure. This is not yet addressed in the literature

Jan Gomulkiewicz; Jacek Miekisz; Stanislaw Miekisz

2007-06-05T23:59:59.000Z

71

Information transmission through lossy bosonic memory channels  

E-Print Network (OSTI)

We study the information transmission through a quantum channel, defined over a continuous alphabet and losing its energy en route, in presence of correlated noise among different channel uses. We then show that entangled inputs improve the rate of transmission of such a channel.

Giovanna Ruggeri; Giulio Soliani; Vittorio Giovannetti; Stefano Mancini

2005-02-15T23:59:59.000Z

72

Construction of Channels (Indiana)  

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

Permission is required from the Natural Resources Commission is required for the construction or alteration of artificial channels or improved channels of natural watercourses that connect to any...

73

TWO-PHOTON INTERFERENCE USING BACKGROUND ...  

Science Conference Proceedings (OSTI)

... OF SINGLE PHOTONS FROM A SEMICONDUCTOR QUANTUM DOT. ... material systems, self-assembled semiconductor quantum dots (QDs) have ...

74

A Simple Protocol to Communicate Channels over Channels  

Science Conference Proceedings (OSTI)

In this paper we present the communication protocol that we use to implement first class channels. Ordinary channels allow data communication (like CSP/Occam); first class channels allow communicating channel ends over a channel. This enables processes ...

Henk L. Muller; David May

1998-09-01T23:59:59.000Z

75

Quantum polar codes for arbitrary channels  

E-Print Network (OSTI)

We construct a new entanglement-assisted quantum polar coding scheme which achieves the symmetric coherent information rate by synthesizing "amplitude" and "phase" channels from a given, arbitrary quantum channel. We first demonstrate the coding scheme for arbitrary quantum channels with qubit inputs, and we show that quantum data can be reliably decoded by O(N) rounds of coherent quantum successive cancellation, followed by N controlled-NOT gates (where N is the number of channel uses). We also find that the entanglement consumption rate of the code vanishes for degradable quantum channels. Finally, we extend the coding scheme to channels with multiple qubit inputs. This gives a near-explicit method for realizing one of the most striking phenomena in quantum information theory: the superactivation effect, whereby two quantum channels which individually have zero quantum capacity can have a non-zero quantum capacity when used together.

Wilde, Mark M

2012-01-01T23:59:59.000Z

76

Entanglement Cost of Quantum Channels  

E-Print Network (OSTI)

The entanglement cost of a quantum channel is the minimal rate at which entanglement (between sender and receiver) is needed in order to simulate many copies of a quantum channel in the presence of free classical communication. In this paper we show how to express this quantity as a regularized optimization of the entanglement formation over states that can be generated between sender and receiver. Our formula is the channel analog of a well-known formula for the entanglement cost of quantum states in terms of the entanglement of formation; and shares a similar relation to the recently shattered hope for additivity. The entanglement cost of a quantum channel can be seen as the analog of the quantum reverse Shannon theorem in the case where free classical communication is allowed. The techniques used in the proof of our result are then also inspired by a recent proof of the quantum reverse Shannon theorem and feature the one-shot formalism for quantum information theory, the post-selection technique for quantum channels as well as von Neumann's minimax theorem. We discuss two applications of our result. First, we are able to link the security in the noisy-storage model to a problem of sending quantum rather than classical information through the adversary's storage device. This not only improves the range of parameters where security can be shown, but also allows us to prove security for storage devices for which no results were known before. Second, our result has consequences for the study of the strong converse quantum capacity. Here, we show that any coding scheme that sends quantum information through a quantum channel at a rate larger than the entanglement cost of the channel has an exponentially small fidelity.

Mario Berta; Fernando Brandao; Matthias Christandl; Stephanie Wehner

2011-08-26T23:59:59.000Z

77

Fading channel simulator  

DOE Patents (OSTI)

This invention relates to high frequency (HF) radio signal propagation through fading channels and, more particularly, to simulation of fading channels in order to characterize HF radio system performance in transmitting and receiving signals through such fading channels. Fading channel effects on a transmitted communication signal are simulated with both frequency and time variations using a channel scattering function to affect the transmitted signal. A conventional channel scattering function is converted to a series of channel realizations by multiplying the square root of the channel scattering function by a complex number of which the real and imaginary parts are each independent variables. The two-dimensional inverse-FFT of this complex-valued channel realization yields a matrix of channel coefficients that provide a complete frequency-time description of the channel. The transmitted radio signal is segmented to provide a series of transmitted signal and each segment is subject to FFT to generate a series of signal coefficient matrices. The channel coefficient matrices and signal coefficient matrices are then multiplied and subjected to inverse-FFT to output a signal representing the received affected radio signal. A variety of channel scattering functions can be used to characterize the response of a transmitter-receiver system to such atmospheric effects.

Argo, P.E.; Fitzgerald, T.J.

1991-12-31T23:59:59.000Z

78

Fidelity of Gaussian Channels  

Science Conference Proceedings (OSTI)

A noisy Gaussian channel is defined as a channel in which an input field mode is subjected to random Gaussian displacements in phase space. We introduce the quantum fidelity of a Gaussian channel for pure and mixed input states, and we derive a universal ...

Carlton M. Caves; Krzysztof Wódkiewicz

2004-12-01T23:59:59.000Z

79

Formation flow channel blocking  

SciTech Connect

A method is claimed for selectively blocking high permeability flow channels in an underground hydrocarbon material bearing formation having flow channels of high permeability and having flow channels of lesser permeability. The method includes the following steps: introducing a blocking material fluid comprising a blocking material in a carrier into the flow channels through an injection well in communication with the formation; introducing a buffer fluid into the formation through the injection well for the buffer fluid to displace the blocking material fluid away from the injection well; allowing the blocking material to settle in the channels to resist displacement by fluid flowing through the channels; introducing a quantity of an activating fluid into the channels through the injection well at a sufficient rate for the activating fluid to displace the buffer fluid and finger into the high permeability channels to reach the blocking material in the high permeability channels without reaching the blocking material in the low permeability channels, the activating fluid being adapted to activate the blocking material which it reaches to cause blocking of the high permeability channels.

Kalina, A.I.

1982-11-30T23:59:59.000Z

80

Simulating a single qubit channel using a mixed state environment  

E-Print Network (OSTI)

We analyze the class of single qubit channels with the environment modeled by a one-qubit mixed state. The set of affine transformations for this class of channels is computed analytically, employing the canonical form for the two-qubit unitary operator. We demonstrate that, 3/8 of the generalized depolarizing channels can be simulated by the one-qubit mixed state environment by explicitly obtaining the shape of the volume occupied by this class of channels within the tetrahedron representing the generalized depolarizing channels. Further, as a special case, we show that the two-Pauli Channel cannot be simulated by a one-qubit mixed state environment.

Geetu Narang; Arvind

2006-11-06T23:59:59.000Z

Note: This page contains sample records for the topic "two-photon channel shows" 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

Show details for [Energy Storage III: Materials ...  

Science Conference Proceedings (OSTI)

Show details for [ACerS ACerS Arthur L. Friedberg Memorial Lecture. Show details for [ACerS ACerS Cooper Award ...

82

Entanglement transmission and generation under channel uncertainty: Universal quantum channel coding  

E-Print Network (OSTI)

We determine the optimal rates of universal quantum codes for entanglement transmission and generation under channel uncertainty. In the simplest scenario the sender and receiver are provided merely with the information that the channel they use belongs to a given set of channels, so that they are forced to use quantum codes that are reliable for the whole set of channels. This is precisely the quantum analog of the compound channel coding problem. We determine the entanglement transmission and entanglement-generating capacities of compound quantum channels and show that they are equal. Moreover, we investigate two variants of that basic scenario, namely the cases of informed decoder or informed encoder, and derive corresponding capacity results.

I. Bjelakovic; H. Boche; J. Noetzel

2008-11-27T23:59:59.000Z

83

Inside Gun Shows What Goes On  

E-Print Network (OSTI)

Gun Shows Work Buying and Selling What's for Sale Culture Politics Interventions v 1 11 55 91 159 219Preface Inside Gun Shows What Goes On When Everybody Thinks Nobody's Watching #12;#12;Inside Gun-Violence Effort. She put gun shows on my radar and is an ace straw-purchase spotter. Thanks also to Barbara Claire

Leistikow, Bruce N.

84

Quantum Capacity Approaching Codes for the Detected-Jump Channel  

E-Print Network (OSTI)

The quantum channel capacity gives the ultimate limit for the rate at which quantum data can be reliably transmitted through a noisy quantum channel. Degradable quantum channels are among the few channels whose quantum capacities are known. Given the quantum capacity of a degradable channel, it remains challenging to find a practical coding scheme which approaches capacity. Here we discuss code designs for the detected-jump channel, a degradable channel with practical relevance describing the physics of spontaneous decay of atoms with detected photon emission. We show that this channel can be used to simulate a binary classical channel with both erasures and bit-flips. The capacity of the simulated classical channel gives a lower bound on the quantum capacity of the detected-jump channel. When the jump probability is small, it almost equals the quantum capacity. Hence using a classical capacity approaching code for the simulated classical channel yields a quantum code which approaches the quantum capacity of the detected-jump channel.

Markus Grassl; Zhengfeng Ji; Zhaohui Wei; Bei Zeng

2010-08-19T23:59:59.000Z

85

Quantum Communication With Zero-Capacity Channels  

E-Print Network (OSTI)

Communication over a noisy quantum channel introduces errors in the transmission that must be corrected. A fundamental bound on quantum error correction is the quantum capacity, which quantifies the amount of quantum data that can be protected. We show theoretically that two quantum channels, each with a transmission capacity of zero, can have a nonzero capacity when used together. This unveils a rich structure in the theory of quantum communications, implying that the quantum capacity does not uniquely specify a channel's ability for transmitting quantum information.

Graeme Smith; Jon Yard

2008-07-30T23:59:59.000Z

86

The Paris Motor Show | Department of Energy  

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

Paris Motor Show Paris Motor Show The Paris Motor Show October 4, 2010 - 9:39am Addthis David Sandalow at the Paris Auto Show | DOE photo David Sandalow at the Paris Auto Show | DOE photo David Sandalow David Sandalow Former Under Secretary of Energy (Acting) and Assistant Secretary for Policy & International Affairs At the Paris Motor Show today, electric cars are everywhere. Chevrolet is showing off the Volt, its plug-in hybrid due in U.S. showrooms this December. (Motown music blared as a Chevy rep told me all about the car's performance.) Nissan is displaying the Leaf, its all-electric sedan scheduled to roll off assembly lines in Tennessee starting in 2012. Volvo has new plug-in models. So do Saab, Peugot and other European manufacturers. And as I walked through the gates in a huge crowd, the first

87

The Paris Motor Show | Department of Energy  

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

The Paris Motor Show The Paris Motor Show The Paris Motor Show October 4, 2010 - 9:39am Addthis David Sandalow at the Paris Auto Show | DOE photo David Sandalow at the Paris Auto Show | DOE photo David Sandalow David Sandalow Former Under Secretary of Energy (Acting) and Assistant Secretary for Policy & International Affairs At the Paris Motor Show today, electric cars are everywhere. Chevrolet is showing off the Volt, its plug-in hybrid due in U.S. showrooms this December. (Motown music blared as a Chevy rep told me all about the car's performance.) Nissan is displaying the Leaf, its all-electric sedan scheduled to roll off assembly lines in Tennessee starting in 2012. Volvo has new plug-in models. So do Saab, Peugot and other European manufacturers. And as I walked through the gates in a huge crowd, the first

88

Detroit Auto Show 2012 | Department of Energy  

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

Management Trade Show Supercomputers' Pictorial Superpowers How the Smart Grid Helps Homeowners Reduce Their Energy Use EcoCAR Challenge Finish Line Event 1 of 8 Students Earn...

89

Laser research shows promise for cancer treatment  

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

treatment Laser research shows promise for cancer treatment Scientists have observed for the first time how a laser penetrates dense, electron-rich plasma to generate ions. August...

90

Fractional channel multichannel analyzer  

DOE Patents (OSTI)

A multichannel analyzer incorporating the features of the present invention obtains the effect of fractional channels thus greatly reducing the number of actual channels necessary to record complex line spectra. This is accomplished by using an analog-to-digital converter in the asynchronous mode, i.e., the gate pulse from the pulse height-to-pulse width converter is not synchronized with the signal from a clock oscillator. This saves power and reduces the number of components required on the board to achieve the effect of radically expanding the number of channels without changing the circuit board. 9 figs.

Brackenbush, L.W.; Anderson, G.A.

1994-08-23T23:59:59.000Z

91

Inside Gun Shows What Goes On  

E-Print Network (OSTI)

as 40% of all gun sales. They are quick and convenient, and their anonymity will attract those who putInside Gun Shows What Goes On When Everybody Thinks Nobody's Watching Executive Summary #12;Inside Gun Shows What Goes on When Everybody Thinks Nobody's Watching Garen Wintemute, MD, MPH Violence

Nguyen, Danh

92

The quantum capacity of channels with arbitrarily correlated noise  

E-Print Network (OSTI)

We study optimal rates for quantum communication over a single use of a channel, which itself can correspond to a finite number of uses of a channel with arbitrarily correlated noise. The corresponding capacity is often referred to as the one-shot quantum capacity. In this paper, we prove bounds on the one-shot quantum capacity of an arbitrary channel. This allows us to compute the quantum capacity of a channel with arbitrarily correlated noise, in the limit of asymptotically many uses of the channel. In the memoryless case, we explicitly show that our results reduce to known expressions for the quantum capacity.

Francesco Buscemi; Nilanjana Datta

2009-02-02T23:59:59.000Z

93

Radio Channel Simulator  

Radio Channel Simulator (RCSim) is a simulation package for making site-specific predictions of radio signal strength. The software computes received power atdiscrete grid points as a function of the transmitter location and propagation environment. ...

94

International Builders' Show | Department of Energy  

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

Builders' Show Builders' Show International Builders' Show February 14, 2008 - 11:29am Addthis Remarks as Prepared for Delivery by Secretary Bodman Thank you, Andy, and thank you all for being here. The world has reached an energy crossroads. Rising global energy demand and the need for more environmentally-responsible energy production and consumption have presented us with a number of global challenges that require global solutions. Every American has a role to play in meeting these challenges. And that's why I am very pleased to be here at the International Builders' Show, to tour the floor and to see the technologies that are penetrating the marketplace - many of which originated in DOE's network of world-class national laboratories. I also pleased to be here with the National Association of Home Builders

95

2013 Washington Auto Show | Department of Energy  

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

2013 Washington Auto Show 2013 Washington Auto Show 2013 Washington Auto Show Addthis 1 of 10 While at the Washington Auto Show, Energy Secretary Steven Chu visited Nissan to see the 2013 Leaf. | Photo courtesy of Sarah Gerrity, Energy Department. Date taken: 2013-01-31 13:50 2 of 10 The new Nissan Leaf is being built at the company's Smyrna, Tennessee, Vehicle Assembly Plant -- helping to cut the price of its electric vehicle. | Photo courtesy of Sarah Gerrity, Energy Department. Date taken: 2013-01-31 13:49 3 of 10 Energy Secretary Steven Chu discusses the features of the 2014 Cadillac ELR -- the luxury car built built on the same powertrain platform as the Chevy Volt. | Photo courtesy of Sarah Gerrity, Energy Department. Date taken: 2013-01-31 13:57 4 of 10 Energy Secretary Steven Chu discusses some of the features of the Chevy

96

Detroit Auto Show 2012 | Department of Energy  

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

What&039;s your energypledge? What's your EnergyPledge? 1. Secretary Chu at the Detroit Auto Show Snapshots of the Year in Energy: 12 Awesome Photos from 2012 Day 12: Drive...

97

Gasoline price shows small increase (long version)  

Annual Energy Outlook 2012 (EIA)

long version) The U.S. average retail price for regular gasoline showed little movement from last week. Prices rose 410 of a cent to 3.30 a gallon on Monday, based on the weekly...

98

Gasoline price shows small increase (short version)  

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

showed little movement from last week. Prices rose 410 of a cent to 3.30 a gallon on Monday, based on the weekly price survey by the U.S. Energy Information Administration....

99

Channel capacities via $p$-summing norms  

E-Print Network (OSTI)

In this paper we show how \\emph{the metric theory of tensor products} developed by Grothendieck perfectly fits in the study of channel capacities, a central topic in \\emph{Shannon's information theory}. Furthermore, in the last years Shannon's theory has been generalized to the quantum setting to let the \\emph{quantum information theory} step in. In this paper we consider the classical capacity of quantum channels with restricted assisted entanglement. In particular these capacities include the classical capacity and the unlimited entanglement-assisted classical capacity of a quantum channel. To deal with the quantum case we will use the noncommutative version of $p$-summing maps. More precisely, we prove that the (product state) classical capacity of a quantum channel with restricted assisted entanglement can be expressed as the derivative of a completely $p$-summing norm.

Marius Junge; Carlos palazuelos

2013-05-05T23:59:59.000Z

100

Show Me Ethanol LLC | Open Energy Information  

Open Energy Info (EERE)

Show Me Ethanol LLC Show Me Ethanol LLC Jump to: navigation, search Name Show Me Ethanol, LLC Place Carrollton, Missouri Zip 64633 Product Developing an ethanol project in Carrollton, Missouri. Coordinates 36.935443°, -76.531593° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":36.935443,"lon":-76.531593,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

Note: This page contains sample records for the topic "two-photon channel shows" 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

Detroit Auto Show 2012 | Department of Energy  

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

Detroit Auto Show 2012 Detroit Auto Show 2012 Detroit Auto Show 2012 Addthis 1 of 10 Energy Secretary Steven Chu with Chrysler Chief Executive Sergio Marchionne. Image: Hantz Leger (Energy Department Contractor) Date taken: 2012-01-10 00:00 2 of 10 Energy Secretary Steven Chu examines the Dodge Dart's four cylinder, 2.4-liter, 184 horsepower engine block. Image: Hantz Leger (Energy Department Contractor) Date taken: 2012-01-10 00:00 3 of 10 Energy Secretary Steven Chu gets behind the wheel of the new 2013 Dodge Dart. Image: Hantz Leger (Energy Department Contractor) Date taken: 2012-01-10 00:00 4 of 10 Energy Secretary Steven Chu examines the interior of the new 2013 Dodge Dart. Image: Hantz Leger (Energy Department Contractor) Date taken: 2012-01-10 00:00 5 of 10 Energy Secretary Steven Chu discusses the latest auto innovations with a

102

The Information Flow and Capacity of Channels with Noisy Feedback  

E-Print Network (OSTI)

In this paper, we consider some long-standing problems in communication systems with access to noisy feedback. We introduce a new notion, the residual directed information, to capture the effective information flow (i.e. mutual information between the message and the channel outputs) in the forward channel. In light of this new concept, we first investigate discrete memoryless channels (DMC) with noisy feedback and prove that the noisy feedback capacity is not achievable by using any typical closed-loop encoder (non-trivially taking feedback information to produce channel inputs). We then provide a channel coding theorem in terms of the residual directed information to characterize the capacity of channels with noisy feedback. We further show that the capacity can be simply characterized by the causal conditional directed information when channels satisfy the strong converse property.

Li, Chong

2011-01-01T23:59:59.000Z

103

Maximal output purity and capacity for asymmetric unital qudit channels  

E-Print Network (OSTI)

We consider generalizations of depolarizing channels to maps in which the identity channel is replaced by a convex combinations of unitary conjugations. We show that one can construct unital channels of this type for which the input which achieves maximal output purity is unique. We give conditions under which multiplicativity of the maximal p-norm and additivity of the minimal output entropy. We also show that the Holevo capacity need not equal log d - the minimal entropy as one might expect for a convex combination of unitary conjugations. Conversely, we give examples for which this condition holds, but the channel has no evident covariance properties.

Nilanjana Datta; Mary Beth Ruskai

2005-05-08T23:59:59.000Z

104

Channel plate for DNA sequencing  

DOE Patents (OSTI)

This invention is a channel plate that facilitates data compaction in DNA sequencing. The channel plate has a length, a width and a thickness, and further has a plurality of channels that are parallel. Each channel has a depth partially through the thickness of the channel plate. Additionally an interface edge permits electrical communication across an interface through a buffer to a deposition membrane surface.

Douthart, Richard J. (Richland, WA); Crowell, Shannon L. (Eltopia, WA)

1998-01-01T23:59:59.000Z

105

Channel plate for DNA sequencing  

DOE Patents (OSTI)

This invention is a channel plate that facilitates data compaction in DNA sequencing. The channel plate has a length, a width and a thickness, and further has a plurality of channels that are parallel. Each channel has a depth partially through the thickness of the channel plate. Additionally an interface edge permits electrical communication across an interface through a buffer to a deposition membrane surface. 15 figs.

Douthart, R.J.; Crowell, S.L.

1998-01-13T23:59:59.000Z

106

Channeling through Bent Crystals  

Science Conference Proceedings (OSTI)

Bent crystals have demonstrated potential for use in beam collimation. A process called channeling is when accelerated particle beams are trapped by the nuclear potentials in the atomic planes within a crystal lattice. If the crystal is bent then the particles can follow the bending angle of the crystal. There are several different effects that are observed when particles travel through a bent crystal including dechanneling, volume capture, volume reflection and channeling. With a crystal placed at the edge of a particle beam, part of the fringe of the beam can be deflected away towards a detector or beam dump, thus helping collimate the beam. There is currently FORTRAN code by Igor Yazynin that has been used to model the passage of particles through a bent crystal. Using this code, the effects mentioned were explored for beam energy that would be seen at the Facility for Advanced Accelerator Experimental Tests (FACET) at a range of crystal orientations with respect to the incoming beam. After propagating 5 meters in vacuum space past the crystal the channeled particles were observed to separate from most of the beam with some noise due to dechanneled particles. Progressively smaller bending radii, with corresponding shorter crystal lengths, were compared and it was seen that multiple scattering decreases with the length of the crystal therefore allowing for cleaner detection of the channeled particles. The input beam was then modified and only a portion of the beam sent through the crystal. With the majority of the beam not affected by the crystal, most particles were not deflected and after propagation the channeled particles were seen to be deflected approximately 5mm. After a portion of the beam travels through the crystal, the entire beam was then sent through a quadrupole magnet, which increased the separation of the channeled particles from the remainder of the beam to a distance of around 20mm. A different code, which was developed at SLAC, was used to create an angular profile plot which was compared to what was produced by Yazynin's code for a beam with no multiple scattering. The results were comparable, with volume reflection and channeling effects observed and the range of crystal orientations at which volume reflection is seen was about 1 mrad in both simulations.

Mack, Stephanie; /Ottawa U. /SLAC

2012-09-07T23:59:59.000Z

107

Conductive Channel for Energy Transmission  

SciTech Connect

For many years the attempts to create conductive channels of big length were taken in order to study the upper atmosphere and to settle special tasks, related to energy transmission. There upon the program of creation of 'Impulsar' represents a great interest, as this program in a combination with high-voltage high repetition rate electrical source can be useful to solve the above mentioned problems (N. Tesla ideas for the days of high power lasers). The principle of conductive channel production can be shortly described as follows. The 'Impulsar' - laser jet engine vehicle - propulsion take place under the influence of powerful high repetition rate pulse-periodic laser radiation. In the experiments the CO{sub 2}-laser and solid state Nd:YAG laser systems had been used. Active impulse appears thanks to air breakdown (<30 km) or to the breakdown of ablated material on the board (>30 km), placed in the vicinity of the focusing mirror-acceptor of the breakdown waves. With each pulse of powerful laser the device rises up, leaving a bright and dense trace of products with high degree of ionization and metallization by conductive nano-particles due to ablation. Conductive dust plasma properties investigation in our experiments was produced by two very effective approaches: high power laser controlled ablation and by explosion of wire. Experimental and theoretical results of conductive canal modeling will be presented. The estimations show that with already experimentally demonstrated figures of specific thrust impulse the lower layers of the Ionosphere can be reached in several ten seconds that is enough to keep the high level of channel conductivity and stability with the help of high repetition rate high voltage generator. Some possible applications for new technology are highlighted.

Apollonov, Victor V. [A.M. Prokhorov General Physics Institute, Vavilov Str. 38, Moscow, 119991 (Russian Federation)

2011-11-10T23:59:59.000Z

108

Multiple Access Channels with Generalized Feedback and Confidential Messages  

E-Print Network (OSTI)

This paper considers the problem of secret communication over a multiple access channel with generalized feedback. Two trusted users send independent confidential messages to an intended receiver, in the presence of a passive eavesdropper. In this setting, an active cooperation between two trusted users is enabled through using channel feedback in order to improve the communication efficiency. Based on rate-splitting and decode-and-forward strategies, achievable secrecy rate regions are derived for both discrete memoryless and Gaussian channels. Results show that channel feedback improves the achievable secrecy rates.

Tang, Xiaojun; Spasojevic, Predrag; Poor, H Vincent

2007-01-01T23:59:59.000Z

109

Thoughts on Incorporating HPRF in a Linear Cooling Channel  

DOE Green Energy (OSTI)

We discuss a possible implementation of high-pressure gas-filled RF (HPRF) cavities in a linear cooling channel for muons and some of the technical issues that must be dealt with. The approach we describe is a hybrid approach that uses high-pressure hydrogen gas to avoid cavity breakdown, along with discrete LiH absorbers to provide the majority of the energy loss. Initial simulations show that the channel performs as well as the original vacuum RF channel while potentially avoiding the degradation in RF gradient associated with the strong magnetic field in the cooling channel.

Gallardo, Juan C.; Zisman, Michael S

2009-08-20T23:59:59.000Z

110

Convective Cooling of Lightning Channels  

Science Conference Proceedings (OSTI)

We report experimental data which trace the time development of electric discharge channels in air and which demonstrate the turbulent cooling of such channels. These data provide qualitative confirmation of the model proposed and used by Hill, ...

J. M. Picone; J. P. Boris; J. R. Greig; M. Raleigh; R. F. Fernsler

1981-09-01T23:59:59.000Z

111

The private capacity of quantum channels is not additive  

E-Print Network (OSTI)

Recently there has been considerable activity on the subject of additivity of various quantum channel capacities. Here, we construct a family of channels with sharply bounded classical, hence private capacity. On the other hand, their quantum capacity when combined with a zero private (and zero quantum) capacity erasure channel, becomes larger than the previous classical capacity. As a consequence, we can conclude for the first time that the classical private capacity is non-additive. In fact, in our construction even the quantum capacity of the tensor product of two channels can be greater than the sum of their individual classical private capacities. We show that this violation occurs quite generically: every channel can be embedded into our construction, and a violation occurs whenever the given channel has larger entanglement assisted quantum capacity than (unassisted) classical capacity.

Ke Li; Andreas Winter; XuBo Zou; GuangCan Guo

2009-03-25T23:59:59.000Z

112

Minimum error discrimination of Pauli channels  

E-Print Network (OSTI)

We solve the problem of discriminating with minimum error probability two given Pauli channels. We show that, differently from the case of discrimination between unitary transformations, the use of entanglement with an ancillary system can strictly improve the discrimination, and any maximally entangled state allows to achieve the optimal discrimination. We also provide a simple necessary and sufficient condition in terms of the structure of the channels for which the ultimate minimum error probability can be achieved without entanglement assistance. When such a condition is satisfied, the optimal input state is simply an eigenstate of one of the Pauli matrices.

Massimiliano F. Sacchi

2005-06-09T23:59:59.000Z

113

Covert channels in IPv6  

Science Conference Proceedings (OSTI)

A covert channel is a communication path that allows transferring information in a way that violates a system security policy. Because of their concealed nature, detecting and preventing covert channels are obligatory security practices. In this paper, ... Keywords: IPsec, IPv6, active warden, covert channel, stateful, stateless

Norka B. Lucena; Grzegorz Lewandowski; Steve J. Chapin

2005-05-01T23:59:59.000Z

114

Alpha Channeling in Rotating Plasma with Stationary Waves  

SciTech Connect

An extension of the alpha channeling effect to supersonically rotating mirrors shows that the rotation itself can be driven using alpha particle energy. Alpha channeling uses radiofrequency waves to remove alpha particles collisionlessly at low energy. We show that stationary magnetic fields with high n? can be used for this purpose, and simulations show that a large fraction of the alpha energy can be converted to rotation energy.

A. Fetterman and N.J. Fisch

2010-02-15T23:59:59.000Z

115

A G-protein-activated inwardly rectifying K + channel (GIRK4) from human hippocampus associates with other GIRK channels  

E-Print Network (OSTI)

protein and shows high structural similarity to other subfamily members of G-protein-activated inwardly rectifying K ’ channels (GIRK) have been identified in the human hippocampus. When expressed in Xenopus oocytes, GIRK4 yielded functional GIRK channels with activity that was enhanced by the stimulation of coexpressed serotonin 1A receptors. GIRK4 potentiated basal and agonist-induced currents mediated by other GIRK channels, possibly because of channel heteromerization. Despite the structural similarity to a putative rat KATp channel, no ATP sensitivity or K,,,-typical pharmacology was observed for GIRK4 alone or GIRK4 transfected in conjunction with other GIRK channels in COS-7 cells. In rat brain, GIRK4 is expressed together with three other subfamily members, GIRKI-3, most likely in identical hippocampal neurons. Thus, heteromerization or an unknown molecular interaction may cause the physiological diversity observed

Er Spauschus; Klaus-ulrich Lentes; Erhard Wischmeyer; Elke Diomann; Christine Karschin; Andreas Karschinl

1996-01-01T23:59:59.000Z

116

Notes on entropic characteristics of quantum channels  

E-Print Network (OSTI)

One of most important issues in quantum information theory concerns transmission of information through noisy quantum channels. We discuss few channel characteristics expressed by means of generalized entropies. Such characteristics can often be dealt in line with more usual treatment based on the von Neumann entropies. For any channel, we show that the $q$-average output entropy of degree $q\\geq1$ is bounded from above by the $q$-entropy of the input density matrix. Concavity properties of the $(q,s)$-entropy exchange are considered. Fano type quantum bounds on the $(q,s)$-entropy exchange are derived. We also give upper bounds on the map $(q,s)$-entropies in terms of the output entropy, corresponding to the completely mixed input.

Alexey E. Rastegin

2012-06-14T23:59:59.000Z

117

Joint Source-Channel Coding over a Fading Multiple Access Channel with Partial Channel State Information  

E-Print Network (OSTI)

In this paper we address the problem of transmission of correlated sources over a fast fading multiple access channel (MAC) with partial channel state information available at both the encoders and the decoder. We provide sufficient conditions for transmission with given distortions. Next these conditions are specialized to a Gaussian MAC (GMAC). We provide the optimal power allocation strategy and compare the strategy with various levels of channel state information. Keywords: Fading MAC, Power allocation, Partial channel state information, Correlated sources.

Rajesh, R

2009-01-01T23:59:59.000Z

118

Geek-Up[11.05.10]: Quark Gluon Plasma, Solar-Power Generating...  

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

A simulation of the two-photon channel shows what ATLAS sees when the decay of a Higgs boson results in the production of two gamma rays. The blue beads indicate intermediate...

119

Static virtual channel allocation in oblivious routing  

E-Print Network (OSTI)

Most virtual channel routers have multiple virtual channels to mitigate the effects of head-of-line blocking. When there are more flows than virtual channels at a link, packets or flows must compete for channels, either ...

Shim, Keun Sup

120

Positron Beam Propagation in a Meter Long Plasma Channel  

SciTech Connect

Recent experiments and simulations have shown that positron beams propagating in plasmas can be focused and also create wakes with large accelerating gradients. For similar parameters, the wakes driven by positron beams are somewhat smaller compared to the case of an electron beam. Simulations have shown that the wake amplitude can be increased if the positron beam is propagated in a hollow plasma channel (Ref. 1). This paper, compares experimentally, the propagation and beam dynamics of a positron beam in a meter scale homogeneous plasma, to a positron beam hollow channel plasma. The results show that positron beams in hollow channels are less prone to distortions and deflections. Hollow channels were observed to guide the positron beam onto the channel axis. Beam energy loss was also observed implying the formation of a large wake amplitude. The experiments were carried out as part of the E-162 plasma wakefield experiments at SLAC.

Marsh, K.A.; Blue, B.E.; Clayton, C.E.; Joshi, C.; Mori, W.B.; /UCLA; Decker, F.-J.; Hogan, M.J.; Iverson, R.; O' Connell, C.; Raimondi, P.; Siemann, Robert H.; Walz, D.; /SLAC; Katsouleas, T.C.; Muggli, P.; /Southern California U.

2008-03-17T23:59:59.000Z

Note: This page contains sample records for the topic "two-photon channel shows" 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

RESONANCE PRODUCTION BY TWO-PHOTON INTERACTIONS AT SPEAR  

E-Print Network (OSTI)

141 (1979). C. Edwards et al. , SLAC-PUB-2821 (1981). G. S.the University of California. SLAC-PUB-2758 LBL-10226 Junebeen studied with the SLAC-LBL Mark II magnetic detector at

Jenni, P.

2013-01-01T23:59:59.000Z

122

Microphotonic parabolic light directors fabricated by two-photon lithography  

E-Print Network (OSTI)

light directors for producing collimated beams for applications in advanced solar cell and light-emitting diode designs. VC 2011 American Institute of Physics. [doi:10.1063/1.3648115] Planar micro- and nano

Heaton, Thomas H.

123

Use of Two Photon Polymerization to Create Microscale and ...  

Science Conference Proceedings (OSTI)

Comparision of Stellite Coatings on Valve Steel Material Prepared by Plasma Transferred Arc and Cold Metal Transfer Techniques · Conditioning of Composite

124

Constrained capacity of MIMO Rayleigh fading channels  

E-Print Network (OSTI)

In this thesis channel capacity of a special type of multiple-input multiple-output (MIMO) Rayleigh fading channels is studied, where the transmitters are subject to a finite phase-shift keying (PSK) input alphabet. The constraint on the input alphabet makes an analytical solution for the capacity beyond reach. However we are able to simplify the final expression, which requires a single expectation and thus can be evaluated easily through simulation. To facilitate simulations, analytical expressions are derived for the eigenvalues and eigenvectors of a covariance matrix involved in the simplified capacity expression. The simplified expression is used to provide some good approximations to the capacity at low signal-to-noise ratios (SNRs). Involved in derivation of the capacity is the capacity-achieving input distribution. It is proved that a uniform prior distribution is capacity achieving. We also show that it is the only capacity-achieving distribution for our channel model. On top of that we generalize the uniqueness case for an input distribution to a broader range of channels.

He, Wenyan

2011-05-01T23:59:59.000Z

125

SAFL Channel | Open Energy Information  

Open Energy Info (EERE)

SAFL Channel SAFL Channel Jump to: navigation, search Basic Specifications Facility Name SAFL Channel Overseeing Organization University of Minnesota Hydrodynamics Hydrodynamic Testing Facility Type Channel Length(m) 84.0 Beam(m) 2.8 Depth(m) 1.8 Cost(per day) Contact POC Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 6.1 Length of Effective Tow(m) 76.0 Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.4 Maximum Wave Length(m) 6.6 Wave Period Range(s) 0.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking No Wavemaking Description Programmable control of wave making is currently in development and will be available in fall of 2009. Wave Direction Uni-Directional Simulated Beach Yes Description of Beach Channel is sufficiently adaptable to allow simulation of beach

126

Requirements for signaling channel authentication  

SciTech Connect

This contribution addresses requirements for ATM signaling channel authentication. Signaling channel authentication is an ATM security service that binds an ATM signaling message to its source. By creating this binding, the message recipient, and even a third party, can confidently verify that the message originated from its claimed source. This provides a useful mechanism to mitigate a number of threats. For example, a denial of service attack which attempts to tear-down an active connection by surreptitiously injecting RELEASE or DROP PARTY messages could be easily thwarted when authenticity assurances are in place for the signaling channel. Signaling channel authentication could also be used to provide the required auditing information for accurate billing which is impervious to repudiation. Finally, depending on the signaling channel authentication mechanism, end-to-end integrity of the message (or at least part of it) can be provided. None of these capabilities exist in the current specifications.

Tarman, T.D.

1995-12-11T23:59:59.000Z

127

Design of Sparse Filters for Channel Shortening  

Science Conference Proceedings (OSTI)

Channel shortening equalizers are used in acoustics to reduce reverberation, in error control decoding to reduce complexity, and in communication receivers to reduce inter-symbol interference. The cascade of a channel and channel shortening equalizer ... Keywords: Channel shortening, Discrete multi-tone modulation, Reverberant channels, Sparse filters, Time-domain equalizers

Aditya Chopra; Brian Lawrence Evans

2012-03-01T23:59:59.000Z

128

A Mathematical Model for Voltage Gated Ion-channel Stationary Conductance  

E-Print Network (OSTI)

are LVA and show fast macroscopic inactivation where as L-Type calcium channels are HVAs. 37 #12;-80 -60

Duffy, Ken

129

Quantum-capacity-approaching codes for the detected-jump channel  

SciTech Connect

The quantum-channel capacity gives the ultimate limit for the rate at which quantum data can be reliably transmitted through a noisy quantum channel. Degradable quantum channels are among the few channels whose quantum capacities are known. Given the quantum capacity of a degradable channel, it remains challenging to find a practical coding scheme which approaches capacity. Here we discuss code designs for the detected-jump channel, a degradable channel with practical relevance describing the physics of spontaneous decay of atoms with detected photon emission. We show that this channel can be used to simulate a binary classical channel with both erasures and bit flips. The capacity of the simulated classical channel gives a lower bound on the quantum capacity of the detected-jump channel. When the jump probability is small, it almost equals the quantum capacity. Hence using a classical capacity-approaching code for the simulated classical channel yields a quantum code which approaches the quantum capacity of the detected-jump channel.

Grassl, Markus; Wei Zhaohui [Centre for Quantum Technologies, National University of Singapore, Singapore 117543 (Singapore); Ji Zhengfeng [Perimeter Institute for Theoretical Physics, Waterloo, Ontario N2L 2Y5 (Canada); State Key Laboratory of Computer Science, Institute of Software, Chinese Academy of Sciences, Beijing 100190 (China); Zeng Bei [Department of Mathematics and Statistics, University of Guelph, Guelph, Ontario N1G 2W1 (Canada); Institute for Quantum Computing and Department of Combinatorics and Optimization, University of Waterloo, Waterloo, Ontario N2L 3G1 (Canada)

2010-12-15T23:59:59.000Z

130

Information-Theoretically Secure Communication Under Channel Uncertainty  

E-Print Network (OSTI)

Secure communication under channel uncertainty is an important and challenging problem in physical-layer security and cryptography. In this dissertation, we take a fundamental information-theoretic view at three concrete settings and use them to shed insight into efficient secure communication techniques for different scenarios under channel uncertainty. First, a multi-input multi-output (MIMO) Gaussian broadcast channel with two receivers and two messages: a common message intended for both receivers (i.e., channel uncertainty for decoding the common message at the receivers) and a confidential message intended for one of the receivers but needing to be kept asymptotically perfectly secret from the other is considered. A matrix characterization of the secrecy capacity region is established via a channel-enhancement argument and an extremal entropy inequality previously established for characterizing the capacity region of a degraded compound MIMO Gaussian broadcast channel. Second, a multilevel security wiretap channel where there is one possible realization for the legitimate receiver channel but multiple possible realizations for the eavesdropper channel (i.e., channel uncertainty at the eavesdropper) is considered. A coding scheme is designed such that the number of secure bits delivered to the legitimate receiver depends on the actual realization of the eavesdropper channel. More specifically, when the eavesdropper channel realization is weak, all bits delivered to the legitimate receiver need to be secure. In addition, when the eavesdropper channel realization is strong, a prescribed part of the bits needs to remain secure. We call such codes security embedding codes, referring to the fact that high-security bits are now embedded into the low-security ones. We show that the key to achieving efficient security embedding is to jointly encode the low-security and high-security bits. In particular, the low-security bits can be used as (part of) the transmitter randomness to protect the high-security ones. Finally, motivated by the recent interest in building secure, robust and efficient distributed information storage systems, the problem of secure symmetrical multilevel diversity coding (S-SMDC) is considered. This is a setting where there are channel uncertainties at both the legitimate receiver and the eavesdropper. The problem of encoding individual sources is first studied. A precise characterization of the entire admissible rate region is established via a connection to the problem of secure coding over a three-layer wiretap network and utilizing some basic polyhedral structure of the admissible rate region. Building on this result, it is then shown that the simple coding strategy of separately encoding individual sources at the encoders can achieve the minimum sum rate for the general S-SMDC problem.

Ly, Hung Dinh

2012-05-01T23:59:59.000Z

131

Information geometry of Gaussian channels  

Science Conference Proceedings (OSTI)

We define a local Riemannian metric tensor in the manifold of Gaussian channels and the distance that it induces. We adopt an information-geometric approach and define a metric derived from the Bures-Fisher metric for quantum states. The resulting metric inherits several desirable properties from the Bures-Fisher metric and is operationally motivated by distinguishability considerations: It serves as an upper bound to the attainable quantum Fisher information for the channel parameters using Gaussian states, under generic constraints on the physically available resources. Our approach naturally includes the use of entangled Gaussian probe states. We prove that the metric enjoys some desirable properties like stability and covariance. As a by-product, we also obtain some general results in Gaussian channel estimation that are the continuous-variable analogs of previously known results in finite dimensions. We prove that optimal probe states are always pure and bounded in the number of ancillary modes, even in the presence of constraints on the reduced state input in the channel. This has experimental and computational implications. It limits the complexity of optimal experimental setups for channel estimation and reduces the computational requirements for the evaluation of the metric: Indeed, we construct a converging algorithm for its computation. We provide explicit formulas for computing the multiparametric quantum Fisher information for dissipative channels probed with arbitrary Gaussian states and provide the optimal observables for the estimation of the channel parameters (e.g., bath couplings, squeezing, and temperature).

Monras, Alex [Dipartimento di Matematica e Informatica, Universita degli Studi di Salerno, Via Ponte don Melillo, I-84084 Fisciano (Italy); CNR-INFM Coherentia, Napoli (Italy); CNISM Unita di Salerno (Italy) and INFN Sezione di Napoli, Gruppo collegato di Salerno, Baronissi (Italy); Illuminati, Fabrizio [Dipartimento di Matematica e Informatica, Universita degli Studi di Salerno, Via Ponte don Melillo, I-84084 Fisciano (Italy); CNR-INFM Coherentia, Napoli (Italy) and CNISM Unita di Salerno; and INFN Sezione di Napoli, Gruppo collegato di Salerno, Baronissi (Italy); ISI Foundation for Scientific Interchange, Villa Gualino, Viale Settimio Severo 65, I-10133 Torino (Italy)

2010-06-15T23:59:59.000Z

132

Information geometry of Gaussian channels  

E-Print Network (OSTI)

We define a local Riemannian metric tensor in the manifold of Gaussian channels and the distance that it induces. We adopt an information-geometric approach and define a metric derived from the Bures-Fisher metric for quantum states. The resulting metric inherits several desirable properties from the Bures-Fisher metric and is operationally motivated from distinguishability considerations: It serves as an upper bound to the attainable quantum Fisher information for the channel parameters using Gaussian states, under generic constraints on the physically available resources. Our approach naturally includes the use of entangled Gaussian probe states. We prove that the metric enjoys some desirable properties like stability and covariance. As a byproduct, we also obtain some general results in Gaussian channel estimation that are the continuous-variable analogs of previously known results in finite dimensions. We prove that optimal probe states are always pure and bounded in the number of ancillary modes, even in the presence of constraints on the reduced state input in the channel. This has experimental and computational implications: It limits the complexity of optimal experimental setups for channel estimation and reduces the computational requirements for the evaluation of the metric: Indeed, we construct a converging algorithm for its computation. We provide explicit formulae for computing the multiparametric quantum Fisher information for dissipative channels probed with arbitrary Gaussian states, and provide the optimal observables for the estimation of the channel parameters (e.g. bath couplings, squeezing, and temperature).

Alex Monras; Fabrizio Illuminati

2009-11-08T23:59:59.000Z

133

Banking channel management : global trends and strategies  

E-Print Network (OSTI)

Banking channel management has become a crucial component in the drive for improved efficiency. Since the channel is the interlocutor between customers and products, banks are leveraging their knowledge of channels to ...

Catalan, Renato Teixeira

2004-01-01T23:59:59.000Z

134

Performance analysis of relay channel estimation  

Science Conference Proceedings (OSTI)

Amplify-and-Forward (AF) relays can be used to enhance the channel in Multiple-Input-Multiple-Output (MIMO) wireless communication systems. However, optimizing the channel requires Channel State Information (CSI). This paper is concerned with the performance ...

Panagiota Lioliou; Mats Viberg; Mikael Coldrey

2009-11-01T23:59:59.000Z

135

Quantum capacity under adversarial quantum noise: arbitrarily varying quantum channels  

E-Print Network (OSTI)

We investigate entanglement transmission over an unknown channel in the presence of a third party (called the adversary), which is enabled to choose the channel from a given set of memoryless but non-stationary channels without informing the legitimate sender and receiver about the particular choice that he made. This channel model is called arbitrarily varying quantum channel (AVQC). We derive a quantum version of Ahlswede's dichotomy for classical arbitrarily varying channels. This includes a regularized formula for the common randomness-assisted capacity for entanglement transmission of an AVQC. Quite surprisingly and in contrast to the classical analog of the problem involving the maximal and average error probability, we find that the capacity for entanglement transmission of an AVQC always equals its strong subspace transmission capacity. These results are accompanied by different notions of symmetrizability (zero-capacity conditions) as well as by conditions for an AVQC to have a capacity described by a single-letter formula. In he final part of the paper the capacity of the erasure-AVQC is computed and some light shed on the connection between AVQCs and zero-error capacities. Additionally, we show by entirely elementary and operational arguments motivated by the theory of AVQCs that the quantum, classical, and entanglement-assisted zero-error capacities of quantum channels are generically zero and are discontinuous at every positivity point.

Rudolf Ahlswede; Igor Bjelakovic; Holger Boche; Janis Noetzel

2010-10-03T23:59:59.000Z

136

Multipath Channels of Unbounded Capacity  

E-Print Network (OSTI)

The capacity of discrete-time, noncoherent, multipath fading channels is considered. It is shown that if the variances of the path gains decay faster than exponentially, then capacity is unbounded in the transmit power.

Koch, Tobias

2008-01-01T23:59:59.000Z

137

The quantum capacity with symmetric side channels  

E-Print Network (OSTI)

We present an upper bound for the quantum channel capacity that is both additive and convex. Our bound can be interpreted as the capacity of a channel for high-fidelity quantum communication when assisted by a family of channels that have no capacity on their own. This family of assistance channels, which we call symmetric side channels, consists of all channels mapping symmetrically to their output and environment. The bound seems to be quite tight, and for degradable quantum channels it coincides with the unassisted channel capacity. Using this symmetric side channel capacity, we find new upper bounds on the capacity of the depolarizing channel. We also briefly indicate an analogous notion for distilling entanglement using the same class of (one-way) channels, yielding one of the few entanglement measures that is monotonic under local operations with one-way classical communication (1-LOCC), but not under the more general class of local operations with classical communication (LOCC).

Graeme Smith; John A. Smolin; Andreas Winter

2006-07-05T23:59:59.000Z

138

Property:Number of channels | Open Energy Information  

Open Energy Info (EERE)

channels channels Jump to: navigation, search Property Name Number of channels Property Type String Pages using the property "Number of channels" Showing 25 pages using this property. (previous 25) (next 25) A Alden Large Flume + Designed as needed + Alden Small Flume + Designed as needed + Alden Tow Tank + Designed as needed + Alden Wave Basin + Designed as needed + C Chase Tow Tank + 8 + Conte Large Flume + 12 + Conte Small Flume + 12 + D Davidson Laboratory Tow Tank + 16 + DeFrees Flume 1 + 64+ + DeFrees Flume 2 + 64+ + DeFrees Flume 3 + 64+ + DeFrees Flume 4 + 64+ + DeFrees Large Wave Basin + 64+ + DeFrees Small Wave Basin + 64+ + H Haynes Tow Tank + 40 + Haynes Wave Basin + 40 + Hinsdale Wave Basin 1 + Up to 192 + Hinsdale Wave Basin 2 + Up to 192 +

139

Property:Channel/Tunnel/Flume | Open Energy Information  

Open Energy Info (EERE)

Channel/Tunnel/Flume Channel/Tunnel/Flume Jump to: navigation, search Property Name Channel/Tunnel/Flume Property Type String Pages using the property "Channel/Tunnel/Flume" Showing 25 pages using this property. (previous 25) (next 25) 1 1.5-ft Wave Flume Facility + Yes + 10-ft Wave Flume Facility + Yes + 11-ft Wave Flume Facility + None + 2 2-ft Flume Facility + Yes + 3 3-ft Wave Flume Facility + None + 5 5-ft Wave Flume Facility + Yes + 6 6-ft Wave Flume Facility + Yes + A Alden Large Flume + Yes + Alden Small Flume + Yes + Alden Tow Tank + None + Alden Wave Basin + None + B Breakwater Research Facility + None + Bucknell Hydraulic Flume + Yes + C Carderock 2-ft Variable Pressure Cavitation Water Tunnel + Yes + Carderock 3-ft Variable Pressure Cavitation Water Tunnel + Yes +

140

Searches for New Vector Like Quarks: Higgs Channels  

E-Print Network (OSTI)

New vector-like quarks can mix sizably with first generation Standard Model quarks without conflicting with current experimental constraints. Searches for such new quarks have been performed in pair production and electroweak single production channels with subsequent decays into electroweak gauge bosons. To fully explore the underlying structure of the theory the channels with heavy quark decays into Higgs bosons are crucial and in this article we consider for the first time the LHC reach for such channels. The two main production mechanisms involve single production of new quarks through the fusion of a vector boson and the Higgs and single production in association with a Higgs boson. We show that both channels have promising reach at the LHC and that they complement the current direct searches involving decays into electroweak gauge bosons.

Anupama Atre; Mikael Chala; Jose Santiago

2013-02-01T23:59:59.000Z

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


141

Searches for New Vector Like Quarks: Higgs Channels  

E-Print Network (OSTI)

New vector-like quarks can mix sizably with first generation Standard Model quarks without conflicting with current experimental constraints. Searches for such new quarks have been performed in pair production and electroweak single production channels with subsequent decays into electroweak gauge bosons. To fully explore the underlying structure of the theory the channels with heavy quark decays into Higgs bosons are crucial and in this article we consider for the first time the LHC reach for such channels. The two main production mechanisms involve single production of new quarks through the fusion of a vector boson and the Higgs and single production in association with a Higgs boson. We show that both channels have promising reach at the LHC and that they complement the current direct searches involving decays into electroweak gauge bosons.

Atre, Anupama; Santiago, Jose

2013-01-01T23:59:59.000Z

142

Bifurcation of low Reynolds number flows in symmetric channels  

E-Print Network (OSTI)

The ow elds in two-dimensional channels with discontinuous expansions are studied numerically to understand how the channel expansion ratio in uences the symmetric and non-symmetric solutions that are known to occur. For improved con dence and understanding, two distinct numerical techniques are used. The general ow eld characteristics in both symmetric and asymmetric regimes are ascertained by a time-marching nite volume procedure. The ow elds and the bifurcation structure of the steady solutions of the Navier-Stokes equations are determined independently using the nite-element technique. The two procedures are then compared both as to their predicted critical Reynolds numbers and the resulting ow eld characteristics. Following this, both numerical procedures are compared with experiments. The results show that the critical Reynolds number decreases with increasing channel expansion ratio. At a xed supercritical Reynolds number, the location at which the jet rst impinges on the channel wall grows linearly with the expansion ratio. 1

Francine Battaglia; Simon J. Tavener Y; Anil K. Kulkarni Z; Charles L. Merkle X

1997-01-01T23:59:59.000Z

143

On Quantum Capacity of Compound Channels  

E-Print Network (OSTI)

In this paper we address the issue of universal or robust communication over quantum channels. Specifically, we consider memoryless communication scenario with channel uncertainty which is an analog of compound channel in classical information theory. We determine the quantum capacity of finite compound channels and arbitrary compound channels with informed decoder. Our approach in the finite case is based on the observation that perfect channel knowledge at the decoder does not increase the capacity of finite quantum compound channels. As a consequence we obtain coding theorem for finite quantum averaged channels, the simplest class of channels with long-term memory. The extension of these results to quantum compound channels with uninformed encoder and decoder, and infinitely many constituents remains an open problem.

I. Bjelakovic; H. Boche; J. Noetzel

2008-08-07T23:59:59.000Z

144

Evidence of Atmospheric Contamination on the Measurement of the Spectral Response of the GMS-5 Water Vapor Channel  

Science Conference Proceedings (OSTI)

The GMS-5 geostationary satellite carries a channel centered at 6.7 ?m for the measurement of upper-tropospheric humidity. This channel’s spectral response shows structures that are similar to those shown by the atmospheric transmission. This ...

Francois-Marie Bréon; Darren Jackson; John Bates

1999-11-01T23:59:59.000Z

145

Poolside Measurement of AREVA BWR Fuel Channels  

Science Conference Proceedings (OSTI)

As part of the EPRI Fuel Reliability Program, a fuel channel focus group formed in 2002 to initiate measurements on irradiated boiling water reactor (BWR) fuel channels. Fuel channels designed and supplied by Framatome ANP, Inc., an AREVA and Siemens Company (AREVA), were of particular interest, since no measurement information existed from U.S. BWRs with modern AREVA channels. The efforts of the focus group culminated in development of a new channel measurement machine by AREVA and the measurement of AR...

2004-12-13T23:59:59.000Z

146

Non-Markovianity of colored noisy channels  

E-Print Network (OSTI)

We address the non-Markovian character of noisy maps describing the interaction of a qubit with a random classical field. In particular, we evaluate trace- and capacity-based non-Markovianity measures for two relevant classes of environments showing non-Gaussian fluctuations, described respectively by random telegraph noise (RTN) and colored noise with spectra of the the form 1/f^\\alpha. We analyze the dynamics of both the trace distance and the quantum or entanglement assisted capacity, and show that the behaviour of non-Markovianity based on both measures is qualitatively similar. Our results show that environments with a spectrum that contains a relevant low-frequency contribution are generally non-Markovian. We also find that non-Markovianity of colored environments decreases when the number of fluctuators realizing the envinroment increases. Finally, we discuss how reliable transmission of information through a quantum channel subjected to random classical noise may be achieved by tailoring the channel length and properly engineering the structured environments.

C. Benedetti; M. G. A. Paris; S. Maniscalco

2013-09-20T23:59:59.000Z

147

Daylighting Window Film Shows Potential to Significantly Reduce...  

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

Daylighting Window Film Shows Potential to Significantly Reduce Lighting Energy Use in Buildings Outdoor view of the windows testbed facility. Indoor view showing how sunlight is...

148

Virginia EV Road Show - PHEV Operations and Performance  

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

- Virginia EV Road Show - PHEV Operations and Performance Jim Francfort Virginia Clean Cities and Hampton Roads Clean Cities Coalition - Virginia Electric Drive Road Show Poquoson,...

149

Ceramic membranes having macroscopic channels  

DOE Patents (OSTI)

Methods have been developed to make porous ceramic membranes having macroscopic channels therethrough. The novel membranes are formed by temporarily supporting the sol-gel membrane precursor on an organic support which is ultimately removed from the interior of the membrane, preferably by pyrolysis or by chemical destruction. The organic support may also include an inorganic metal portion that remains on destruction of the organic portion, providing structural support and/or chemical reactivity to the membrane. The channels formed when the organic support is destroyed provide the ability to withdraw small catalytic products or size-separated molecules from the metal oxide membrane. In addition, the channel-containing membranes retain all of the advantages of existing porous ceramic membranes.

Anderson, Marc A. (Madison, WI); Peterson, Reid A. (Madison, WI)

1996-01-01T23:59:59.000Z

150

Ceramic membranes having macroscopic channels  

DOE Patents (OSTI)

Methods have been developed to make porous ceramic membranes having macroscopic channels therethrough. The novel membranes are formed by temporarily supporting the sol-gel membrane precursor on an organic support which is ultimately removed from the interior of the membrane, preferably by pyrolysis or by chemical destruction. The organic support may also include an inorganic metal portion that remains on destruction of the organic portion, providing structural support and/or chemical reactivity to the membrane. The channels formed when the organic support is destroyed provide the ability to withdraw small catalytic products or size-separated molecules from the metal oxide membrane. In addition, the channel-containing membranes retain all of the advantages of existing porous ceramic membranes. 1 fig.

Anderson, M.A.; Peterson, R.A.

1996-09-03T23:59:59.000Z

151

Interactions of cyclic nucleotide–gated channel subunits and protein tyrosine kinase probed with genistein  

E-Print Network (OSTI)

abstract The cGMP sensitivity of cyclic nucleotide–gated (CNG) channels can be modulated by changes in phosphorylation catalyzed by protein tyrosine kinases (PTKs) and protein tyrosine phosphatases. Previously, we used genistein, a PTK inhibitor, to probe the interaction between PTKs and homomeric channels comprised of ? subunits (RET?) of rod photoreceptor CNG channels expressed in Xenopus oocytes. We showed that in addition to inhibiting phosphorylation, genistein triggers a noncatalytic interaction between PTKs and homomeric RET? channels that allosterically inhibits channel gating. Here, we show that native CNG channels from rods, cones, and olfactory receptor neurons also exhibit noncatalytic inhibition induced by genistein, suggesting that in each of these sensory cells, CNG channels are part of a regulatory complex that contains PTKs. Native CNG channels are heteromers, containing ? as well as ? subunits. To determine the contributions of ? and ? subunits to genistein inhibition, we compared the effect of genistein on native, homomeric (RET ? and OLF?), and heteromeric (RET???, OLF???, and OLF??RET?) CNG channels. We found that genistein only inhibits channels that contain either the RET ? or the OLF ? subunits. This finding, along with other observations about the maximal effect of genistein and the Hill coefficient of genistein inhibition, suggests that the RET ? and OLF ? subunits contain binding sites for the PTK, whereas RET ? and OLF ? subunits do not. key words: cyclic guanosine monophosphate • protein tyrosine kinase • photoreceptor • olfactory receptor neuron

Elena Molokanova; Alexei Savchenko; Richard H. Kramer

2000-01-01T23:59:59.000Z

152

A Study of Channel Estimation and Postprocessing in Quantum Key Distribution Protocols  

E-Print Network (OSTI)

This thesis investigate the channel estimation and the postprocessing of the quantum key distribution protocols. In particular, we propose a new channel estimation procedure, in which we utilize the bit sequences transmitted and received by different bases, and a new postprocessing with two-way classical communication. Then, we show that the key generation rates of the QKD protocols with our channel estimation and/or our postprocessing are higher than those with conventional ones.

Shun Watanabe

2009-04-13T23:59:59.000Z

153

Eleven-channel second-order silicon microring-resonator filterbank with tunable channel spacing  

E-Print Network (OSTI)

A wide-band, eleven-channel second-order filterbank fabricated on an SOI platform is demonstrated with tunable channel spacing and a 20 GHz single-channel bandwidth. The tuning efficiency is ~28 ?W/GHz/ring.

Dahlem, Marcus Vinicius Sobral

154

FPGA side-channel receivers  

Science Conference Proceedings (OSTI)

The popularity of FPGAs is rapidly growing due to the unique advantages that they offer. However, their distinctive features also raise new questions concerning the security and communication capabilities of an FPGA-based hardware platform. In this paper, ... Keywords: ddr2, fpga, i2c, phase shift, side-channel receiver, thermal

Ji Sun; Ray Bittner; Ken Eguro

2011-02-01T23:59:59.000Z

155

Shallow Water Flows in Channels  

Science Conference Proceedings (OSTI)

We consider the shallow water equations for flows through channels with arbitrary cross section. The system forms a hyperbolic set of balance laws. Exact steady-state solutions are available and are controlled by the relation between the bottom topography ... Keywords: Balance laws, Hyperbolic conservation laws, Steady-state solutions, Upwind schemes

Gerardo Hernández-Dueñas; Smadar Karni

2011-07-01T23:59:59.000Z

156

What Is a Gun Show, Exactly? Gun shows are defined in the U.S. Code of Federal  

E-Print Network (OSTI)

or gun sales at gun shows but not elsewhere (Table 2-1). In the parking lot of a gun show in Pharr, Texas) not less than three gun show vendors exhibit, sell, offer for sale, transfer, or exchange firearms, or exchange; or (2) at which not less than 10 gun show vendors display, offer, or exhibit for sale, sell

Leistikow, Bruce N.

157

Circleville, Ohio Solar Plant Shows Value of Clean Energy Tax...  

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

Circleville, Ohio Solar Plant Shows Value of Clean Energy Tax Credits Circleville, Ohio Solar Plant Shows Value of Clean Energy Tax Credits May 22, 2012 - 5:03pm Addthis NEWS MEDIA...

158

NREL: Technology Transfer - Study Shows Feasibility of High Wind ...  

National Renewable Energy Laboratory Technology Transfer Study Shows Feasibility of High Wind Penetrations in Southwest Power Pool March 15, 2010

159

Monte Carlo calculations of channeling radiation  

Science Conference Proceedings (OSTI)

Results of classical Monte Carlo calculations are presented for the radiation produced by ultra-relativistic positrons incident in a direction parallel to the (110) plane of Si in the energy range 30 to 100 MeV. The results all show the characteristic CR(channeling radiation) peak in the energy range 20 keV to 100 keV. Plots of the centroid energies, widths, and total yields of the CR peaks as a function of energy show the power law dependences of ..gamma../sup 1/ /sup 5/, ..gamma../sup 1/ /sup 7/, and ..gamma../sup 2/ /sup 5/ respectively. Except for the centroid energies and power-law dependence is only approximate. Agreement with experimental data is good for the centroid energies and only rough for the widths. Adequate experimental data for verifying the yield dependence on ..gamma.. does not yet exist.

Bloom, S.D.; Berman, B.L.; Hamilton, D.C.; Alguard, M.J.; Barrett, J.H.; Datz, S.; Pantell, R.H.; Swent, R.H.

1981-01-01T23:59:59.000Z

160

Shanghai Hi Show Photovoltaic Science Technology Co Ltd | Open Energy  

Open Energy Info (EERE)

Hi Show Photovoltaic Science Technology Co Ltd Hi Show Photovoltaic Science Technology Co Ltd Jump to: navigation, search Name Shanghai Hi-Show Photovoltaic Science & Technology Co., Ltd Place Shanghai Municipality, China Zip 201109 Sector Solar Product China-based Manufacturer of module tester and solar simulator. References Shanghai Hi-Show Photovoltaic Science & Technology Co., Ltd[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Shanghai Hi-Show Photovoltaic Science & Technology Co., Ltd is a company located in Shanghai Municipality, China . References ↑ "Shanghai Hi-Show Photovoltaic Science & Technology Co., Ltd" Retrieved from "http://en.openei.org/w/index.php?title=Shanghai_Hi_Show_Photovoltaic_Science_Technology_Co_Ltd&oldid=350840

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


161

Channel complex architecture of fine-grained submarine fans at the base-of-slope  

Science Conference Proceedings (OSTI)

The fan-valley or upper fan channel connects the submarine canyon on the outer shelf-upper slope to the basin proper. It is an erosionally-formed channel that is a conduit for sediment transported to the basin. The valley may widen where it enters the base-of-slope area. Most of the density flows are much smaller than the initial flow and therefore will not occupy the entire width of the upper fan channel. Smaller individual channels will be constructed resulting in a massive fill comprised of amalgamated sandstones. Sand-rich levees and overbank deposits flank each channel. Channel switching may take place toward locations with a slightly steeper gradient. These switches most likely result from irregular flow successions and different flow sizes. Erosion between successive channels is common, removing part of the channel fill and levee-overbank deposits. This results in a disorderly distribution of low-permeability barriers creating local obstruction to connectivity. A study of the sedimentological architecture of the updip mid-fan channel complex was conducted on cliff sections of the Permian Tanqua Karoo subbasin in South Africa, and in Big Rock Quarry in North Little Rock, Arkansas. Seismic records of the base-of-slope of the Mississippi Fan show a widening pattern, and of the Bryant Canyon Fan Complex south of the Sigsbee Escarpment the channel complexity. Integration of seismic data in outcrop observations improves our understanding of the complexity of many good reservoir sands, typically overlain by slope shales.

Bouma, A.H. [Louisiana State Univ., Baton Rouge, LA (United States); Gwang, H. [Kunsan National Univ. (Korea, Democratic People`s Republic of); Van Antwerepen, O. [Univ. of Port Elizabeth (South Africa)] [and others

1995-10-01T23:59:59.000Z

162

Feedback Capacity of the Compound Channel  

E-Print Network (OSTI)

In this work, we find the capacity of a compound finite-state channel (FSC) with time-invariant deterministic feedback. We consider the use of fixed length block codes over the compound channel. Our achievability result ...

Shrader, Brooke E.

163

The generation of shared cryptographic keys through channel impulse response estimation at 60 GHz.  

SciTech Connect

Methods to generate private keys based on wireless channel characteristics have been proposed as an alternative to standard key-management schemes. In this work, we discuss past work in the field and offer a generalized scheme for the generation of private keys using uncorrelated channels in multiple domains. Proposed cognitive enhancements measure channel characteristics, to dynamically change transmission and reception parameters as well as estimate private key randomness and expiration times. Finally, results are presented on the implementation of a system for the generation of private keys for cryptographic communications using channel impulse-response estimation at 60 GHz. The testbed is composed of commercial millimeter-wave VubIQ transceivers, laboratory equipment, and software implemented in MATLAB. Novel cognitive enhancements are demonstrated, using channel estimation to dynamically change system parameters and estimate cryptographic key strength. We show for a complex channel that secret key generation can be accomplished on the order of 100 kb/s.

Young, Derek P.; Forman, Michael A.; Dowdle, Donald Ryan

2010-09-01T23:59:59.000Z

164

Theoretical Estimates of HVAC Duct Channel Capacity for High-Speed Internet Access  

E-Print Network (OSTI)

Theoretical Estimates of HVAC Duct Channel Capacity for High-Speed Internet Access Ariton E. Xhafa-conditioning (HVAC) ducts based on multi-carrier transmission that uses M-QAM mod- ulation and measured channel- flections in HVAC ducts). Our work also shows that data rates in excess of 300 Mbps are possible over

Stancil, Daniel D.

165

Restrictions and Alternative Formulation of the Quasi-Geostrophic Barotropic Channel Model  

Science Conference Proceedings (OSTI)

We derive for a channel model a meridional boundary condition that is equivalent to Phillip's one, but is simpler to implement. We then show that the presence of Ekman dissipation in a quasi-geostrophic channel model with rigid lateral walls, ...

Sandro Rambaldi; Anna Trevisan

1986-01-01T23:59:59.000Z

166

NIST Launches YouTube Channel  

Science Conference Proceedings (OSTI)

... The Department of Commerce negotiated a contract with Google that allows its agencies to establish YouTube channels. ...

2011-04-06T23:59:59.000Z

167

Optimal superdense coding over memory channels  

SciTech Connect

We study the superdense coding capacity in the presence of quantum channels with correlated noise. We investigate both the cases of unitary and nonunitary encoding. Pauli channels for arbitrary dimensions are treated explicitly. The superdense coding capacity for some special channels and resource states is derived for unitary encoding. We also provide an example of a memory channel where nonunitary encoding leads to an improvement in the superdense coding capacity.

Shadman, Z.; Kampermann, H.; Bruss, D.; Macchiavello, C. [Institute fuer Theoretische Physik III, Heinrich-Heine-Universitaet Duesseldorf, DE-40225 Duesseldorf (Germany); Dipartimento di Fisica ''A. Volta'' and INFM-Unita di Pavia, Via Bassi 6, IT-27100 Pavia (Italy)

2011-10-15T23:59:59.000Z

168

Shannon capacity of nonlinear regenerative channels  

E-Print Network (OSTI)

We compute Shannon capacity of nonlinear channels with regenerative elements. Conditions are found under which capacity of such nonlinear channels is higher than the Shannon capacity of the classical linear additive white Gaussian noise channel. We develop a general scheme for designing the proposed channels and apply it to the particular nonlinear sine-mapping. The upper bound for regeneration efficiency is found and the asymptotic behavior of the capacity in the saturation regime is derived.

Sorokina, M A

2013-01-01T23:59:59.000Z

169

Engines - 3-D Animation Shows Complex Geometry of Diesel Particulates  

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

3-D Animation Shows Complex Geometry of Diesel Particulates Diesel particulate matter has a very complex geometry Most studies have observed these three-dimensional structures in...

170

Micromagnets Show Promise as Colorful 'Smart Tags' for MRI  

Science Conference Proceedings (OSTI)

... smart tag” capability to magnetic resonance imaging for medical diagnosis and research. The image on the right shows light scattering from grids of ...

2011-05-03T23:59:59.000Z

171

Closer Look at Cell Membrane Shows Cholesterol 'Keeping ...  

Science Conference Proceedings (OSTI)

... Click to see an animation of the data showing the movement of the membrane with cholesterol present. Credit: NIST View hi-resolution image. ...

2011-04-12T23:59:59.000Z

172

Biological Monitoring at Amchitka Appears to Show Impacts from...  

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

Biological Monitoring at Amchitka Appears to Show Impacts from Fukushima Dai-ichi Incident Third Radiation Effects Research Foundation Board of Councilors Meeting Held in Hiroshima...

173

Nanostructured Carbon Shows Promise for Energy Storage in ...  

ORNL 2010-G00385/jcn UT-B ID 200301297 Nanostructured Carbon Shows Promise for Energy Storage in Supercapacitors Technology Summary Researchers at ORNL have designed ...

174

Moniz: Tesla Repayment Shows the Strength of Energy Department...  

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

Centers Field Sites Power Marketing Administration Other Agencies You are here Home Moniz: Tesla Repayment Shows the Strength of Energy Department's Overall Loan Portfolio...

175

NIST Shows How to Make a Compact Frequency Comb in ...  

Science Conference Proceedings (OSTI)

NIST Shows How to Make a Compact Frequency Comb in Minutes Video Transcript. ... These resonators actually have a pretty wide range of uses. ...

2013-07-11T23:59:59.000Z

176

NIST Shows On-card Fingerprint Match Is Secure, Speedy  

Science Conference Proceedings (OSTI)

... Tests show that wireless data transmission from a ... keep the wireless data transmissions between the ... where more computational power is available. ...

2011-07-18T23:59:59.000Z

177

New NASA Visualizations Show Two Futures of Climate Change  

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

News International News Health News New NASA Visualizations Show Two Futures of Climate Change Print E-mail Thursday, July 25, 2013 By Tara Failey Climate Scenarios...

178

Modified Yeast Show Improved Xylose Fermentation and Toxin ...  

Wind Energy; Partners (27) Visual Patent Search; Success Stories; News; Events; Biomass and Biofuels Modified Yeast Show Improved Xylose Fermentation and Toxin Tolerance

179

Interactive Map Shows Geothermal Resources - Energy Innovation Portal  

Interactive Map Shows Geothermal Resources. February 12, 2013. Source: Jeff Barnard, AP Environmental Writer GRANTS PASS, Ore. (AP) — With the click of a mouse ...

180

Flame acceleration and transition to detonation in channels  

DOE Green Energy (OSTI)

Experimental results are reported for combustion of pre-mixed H/sub 2/-air mixtures in a 136 m/sup 3/ channel and a 1:12.6 linear scale model. Test variables include H/sub 2/-air equivalence ratio, obstacles and degree of transverse venting. The results show that flame acceleration is increased by sensitive mixtures, presence of obstacles, large scales, and insufficient venting. The results also support the hypothesis that deflagration to detonation transition (DDT) can occur if the ratio of detonation cell width to channel width is less than a critical value, provided that the flame speed prior to transition has approached the isobaric sound speed.

Sherman, M.P.; Tieszen, S.R.; Benedick, W.B.

1987-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "two-photon channel shows" 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

Toward a Framework for Assessing Internet Channels  

Science Conference Proceedings (OSTI)

The emergence of the Internet has forced a large number of firms to introduce Internet-based channels of distribution into existing distribution systems to market their products. In multiple channels context, there has been a call for better performance ... Keywords: Internet channels, strategic profit model (SPM), analytic network process (ANP), performance evaluation

Hung-Jen Tu; Chia-Yang Wong

2010-05-01T23:59:59.000Z

182

A Dynamic Model of the Indoor Channel  

Science Conference Proceedings (OSTI)

This paper proposes a new approach to modeling the radio channel experienced by transceivers moving in an indoor environment. For modeling the time-varying impulse response (IR) a randomly time-varying power-delay profile (PDP) is used, which ... Keywords: channel measurements, indoor channel modeling, ray clustering, time-varying PDP, wide band model

Jesper Ødum Nielsen; Valentine Afanassiev; Jørgen Bach Andersen

2001-11-01T23:59:59.000Z

183

Corrosion and arc erosion in MHD channels  

DOE Green Energy (OSTI)

The problems connected with gas side corrosion for the design of the lA4 (POC) channel hardware are explored and results of gas side wear rate tests in the Textron Mark VII facility are presented. It is shown that the proposed designs meet a 2000 hour lifetime criterion based upon these materials tests. Improvement in cathode lifetime is demonstrated with lower voltage intercathode gaps. The corrosion of these materials is discussed and it is shown how lifetimes are dependent upon gap voltage and average metal temperature. The importance of uniformity of slagging to the durability of the anode wall is demonstrated. The wear mechanism of the anodes in the MHD channel is analyzed. In addition to gas-side corrosion, the results of specific water corrosion tests of sidewall materials are discussed. All of the tests reported here were carried out to confirm the gas-side performance and the manufacturability of anode and sidewall designs and to address questions posed about the durability of tungsten-copper on the waterside. the results of water corrosion tests of the tungsten copper alloy sidewall material are presented to show that with proper control of waterside pH and, if necessary, dissolved oxygen, one can obtain reliable performance with no degradation of heat transfer with this material. The final choice of materials was determined primarily by the outcome of these tests and also by the question of the manufacturability of the prospective designs.

Rosa, R.J. (Montana State Univ., Bozeman, MT (United States). Dept. of Mechanical Engineering); Pollina, R.J. (Montana State Univ., Bozeman, MT (United States). Dept. of Mechanical Engineering EG and G Energy Measurements, Inc., Las Vegas, NV (United States))

1992-08-01T23:59:59.000Z

184

Non-iterative joint decoding and signal processing: universal coding approach for channels with memory  

E-Print Network (OSTI)

A non-iterative receiver is proposed to achieve near capacity performance on intersymbol interference (ISI) channels. There are two main ingredients in the proposed design. i) The use of a novel BCJR-DFE equalizer which produces optimal soft estimates of the inputs to the ISI channel given all the observations from the channel and L past symbols exactly, where L is the memory of the ISI channel. ii) The use of an encoder structure that ensures that L past symbols can be used in the DFE in an error free manner through the use of a capacity achieving code for a memoryless channel. Computational complexity of the proposed receiver structure is less than that of one iteration of the turbo receiver. We also provide the proof showing that the proposed receiver achieves the i.i.d. capacity of any constrained input ISI channel. This DFE-based receiver has several advantages over an iterative (turbo) receiver, such as low complexity, the fact that codes that are optimized for memoryless channels can be used with channels with memory, and finally that the channel does not need to be known at the transmitter. The proposed coding scheme is universal in the sense that a single code of rate r; optimized for a memoryless channel, provides small error probability uniformly across all AWGN-ISI channels of i.i.d. capacity less than r: This general principle of a proposed non-iterative receiver also applies to other signal processing functions, such as timing recovery, pattern-dependent noise whiten ing, joint demodulation and decoding etc. This makes the proposed encoder and receiver structure a viable alternative to iterative signal processing. The results show significant complexity reduction and performance gain for the case of timing recovery and patter-dependent noise whitening for magnetic recording channels.

Nangare, Nitin Ashok

2003-05-01T23:59:59.000Z

185

Multiple channel data acquisition system  

DOE Patents (OSTI)

A multiple channel data acquisition system for the transfer of large amounts of data from a multiplicity of data channels has a plurality of modules which operate in parallel to convert analog signals to digital data and transfer that data to a communications host via a FASTBUS. Each module has a plurality of submodules which include a front end buffer (FEB) connected to input circuitry having an analog to digital converter with cache memory for each of a plurality of channels. The submodules are interfaced with the FASTBUS via a FASTBUS coupler which controls a module bus and a module memory. The system is triggered to effect rapid parallel data samplings which are stored to the cache memories. The cache memories are uploaded to the FEBs during which zero suppression occurs. The data in the FEBs is reformatted and compressed by a local processor during transfer to the module memory. The FASTBUS coupler is used by the communications host to upload the compressed and formatted data from the module memory. The local processor executes programs which are downloaded to the module memory through the FASTBUS coupler.

Crawley, H. Bert (Ames, IA); Rosenberg, Eli I. (Ames, IA); Meyer, W. Thomas (Ames, IA); Gorbics, Mark S. (Ames, IA); Thomas, William D. (Boone, IA); McKay, Roy L. (Ames, IA); Homer, Jr., John F. (Ames, IA)

1990-05-22T23:59:59.000Z

186

Multiple channel data acquisition system  

DOE Patents (OSTI)

A multiple channel data acquisition system for the transfer of large amounts of data from a multiplicity of data channels has a plurality of modules which operate in parallel to convert analog signals to digital data and transfer that data to a communications host via a FASTBUS. Each module has a plurality of submodules which include a front end buffer (FEB) connected to input circuitry having an analog to digital converter with cache memory for each of a plurality of channels. The submodules are interfaced with the FASTBUS via a FASTBUS coupler which controls a module bus and a module memory. The system is triggered to effect rapid parallel data samplings which are stored to the cache memories. The cache memories are uploaded to the FEBs during which zero suppression occurs. The data in the FEBs is reformatted and compressed by a local processor during transfer to the module memory. The FASTBUS coupler is used by the communications host to upload the compressed and formatted data from the module memory. The local processor executes programs which are downloaded to the module memory through the FASTBUS coupler. 25 figs.

Crawley, H.B.; Rosenberg, E.I.; Meyer, W.T.; Gorbics, M.S.; Thomas, W.D.; McKay, R.L.; Homer, J.F. Jr.

1990-05-22T23:59:59.000Z

187

A COMPARISON OF LIDAR GENERATED CHANNEL FEATURES WITH GROUND-SURVEYED CHANNEL FEATURES IN THE LITTLE CREEK WATERSHED.  

E-Print Network (OSTI)

??Detecting change in stream channel features over time is important in understanding channel morphology and the effects of both natural and anthropogenic influences. Channel features… (more)

Hilburn, Ryan M

2010-01-01T23:59:59.000Z

188

Study Shows Significant Economic Impact from Recovery Act | Department of  

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

Study Shows Significant Economic Impact from Recovery Act Study Shows Significant Economic Impact from Recovery Act Study Shows Significant Economic Impact from Recovery Act A study recently released shows the $1.6 billion the Savannah River Site (SRS) received from the American Recovery and Reinvestment Act has had a positive economic impact on the adjacent five-county region. The study's findings were presented at the University of South Carolina Aiken's (USC Aiken) Convocation Center. More than 75 people attended the meeting, where presenters commended the Recovery Act for accelerating Cold War cleanup at SRS and boosting employment and business in the local community. Study Shows Significant Economic Impact from Recovery Act More Documents & Publications EA-1605: Final Environmental Assessment EIS-0220: Final Environmental Impact Statement

189

Backstage at the Daily Show | Department of Energy  

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

Backstage at the Daily Show Backstage at the Daily Show Backstage at the Daily Show Addthis Description Backstage footage from Secretary Chu's appearance on the Daily Show where he discuses the green room candy dish and possible lighting considerations. Speakers Secretary Steven Chu Duration 1:32 Topic Energy Efficiency Credit Energy Department Video SECRETARY STEVEN CHU: I'm in the famous green room of the Jon Stewart show. If you look around, I have all these games: Monopoly, a Rubik's Cube, Pictureka! Now if - this is to amuse myself, but in actual fact, the most famous part of this room is this. There's enough chocolate here to put you on a high that - (chuckles) - will really get you going. This is my wife, Jean. JEAN CHU: (Chuckles.) I'm - (chuckles) - edit this out! (Begin recorded segment.)

190

Study Shows Significant Economic Impact from Recovery Act | Department of  

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

Study Shows Significant Economic Impact from Recovery Act Study Shows Significant Economic Impact from Recovery Act Study Shows Significant Economic Impact from Recovery Act A study recently released shows the $1.6 billion the Savannah River Site (SRS) received from the American Recovery and Reinvestment Act has had a positive economic impact on the adjacent five-county region. The study's findings were presented at the University of South Carolina Aiken's (USC Aiken) Convocation Center. More than 75 people attended the meeting, where presenters commended the Recovery Act for accelerating Cold War cleanup at SRS and boosting employment and business in the local community. Study Shows Significant Economic Impact from Recovery Act More Documents & Publications 2010 ARRA Newsletters 2011 ARRA Newsletters Audit Report: OAS-RA-L-11-12

191

Flow-induced channelization in a porous medium  

E-Print Network (OSTI)

We propose a theory for erosional channelization induced by fluid flow in a saturated granular porous medium. When the local fluid flow-induced stress is larger than a critical threshold, grains are dislodged and carried away so that the porosity of the medium is altered by erosion. This in turn affects the local hydraulic conductivity and pressure in the medium and results in the growth and development of channels that preferentially conduct the flow. Our multiphase model involves a dynamical porosity field that evolves along with the volume fraction of the mobile and immobile grains in response to fluid flow that couples the spatiotemporal dynamics of the three phases. Numerical solutions of the resulting initial boundary value problem show how channels form in porous media and highlights how heterogeneity in the erosion threshold dictates the form of the patterns and thus the ability to control them.

Mahadevan, Amala

2010-01-01T23:59:59.000Z

192

Achievable Rate Region of Quantized Broadcast and MAC Channels  

E-Print Network (OSTI)

In this paper, we study the achievable rate region of Gaussian multiuser channels with the messages transmitted being from finite input alphabets and the outputs being {\\em quantized at the receiver}. In particular, we focus on the achievable rate region of $i)$ Gaussian broadcast channel (GBC) and $ii)$ Gaussian multiple access channel (GMAC). First, we study the achievable rate region of two-user GBC when the messages to be transmitted to both the users take values from finite signal sets and the received signal is quantized at both the users. We refer to this channel as {\\em quantized broadcast channel (QBC)}. We observe that the capacity region defined for a GBC does not carry over as such to QBC. We show that the optimal decoding scheme for GBC (i.e., high SNR user doing successive decoding and low SNR user decoding its message alone) is not optimal for QBC. We then propose an achievable rate region for QBC based on two different schemes. We present achievable rate region results for the case of uniform ...

Chandrasekaran, Suresh; Chockalingam, A

2011-01-01T23:59:59.000Z

193

On channels with finite Holevo capacity  

E-Print Network (OSTI)

We consider a nontrivial class of infinite dimensional quantum channels characterized by finiteness of the Holevo capacity. Some general properties of channels of this class are described. In particular, a special sufficient condition of existence of an optimal measure is obtained and examples of channels with no optimal measure are constructed. It is shown that each channel with finite Holevo capacity has a natural extension to the set of all positive normalized functionals on the algebra of all bounded operators. General properties of such an extension are described. The class of infinite dimensional channels, for which the Holevo capacity can be explicitly determined, is considered.

M. E. Shirokov

2006-02-07T23:59:59.000Z

194

NREL: News - NREL Study Shows Renewable Energy Potential in Every...  

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

3012 NREL Study Shows Renewable Energy Potential in Every State U.S. RE Technical Potential study produces estimates across technologies July 26, 2012 A new study of renewable...

195

Brain shows ability to recover from some meth damage  

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

For more information, contact: Karen McNulty Walsh, 631 344-8350, or Mona S. Rowe, 631 344-5056 go to home page 01-91 Dec. 1, 2001 Brain Shows Ability to Recover From Some...

196

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress  

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

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress Print Movement is fundamental to life. It takes place even at the cellular level where cargo is continually being transported...

197

Frostbite Theater - Liquid Nitrogen Experiments - Liquid Nitrogen Show!  

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

Insulators! Insulators! Previous Video (Insulators!) Frostbite Theater Main Index Next Video (Superconductors!) Superconductors! Liquid Nitrogen Show! All of your favorite liquid nitrogen experiments all in one place! Flowers! Balloons! Racquetballs! Nothing is safe! Just sit back, relax, and enjoy the show! [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: Usually, every couple years, Jefferson Lab hosts an Open House. This is the one time the public and come and tour our accelerator and end stations. Steve: During the 2010 Open House, our cameraman snuck into one of the ongoing cryo shows that are held throughout the day. He missed half of it. So if you want to see the entire thing, check our website to see when the

198

Commercial Products Show Potential to serve as Nuclear Material and  

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

Commercial Products Show Potential to serve as Nuclear Material and Commercial Products Show Potential to serve as Nuclear Material and Activity Monitoring Technologies | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > Commercial Products Show Potential to serve as ... Commercial Products Show Potential to serve as Nuclear Material and

199

Commercial Products Show Potential to serve as Nuclear Material and  

National Nuclear Security Administration (NNSA)

Commercial Products Show Potential to serve as Nuclear Material and Commercial Products Show Potential to serve as Nuclear Material and Activity Monitoring Technologies | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > Commercial Products Show Potential to serve as ... Commercial Products Show Potential to serve as Nuclear Material and

200

Prices Show No Tendency to Decrease Second Quarter  

Gasoline and Diesel Fuel Update (EIA)

data show no tendency toward a second quarter decline. The table illustrates that prices move up in the second quarter more often than they move down. Since the Gulf War,...

Note: This page contains sample records for the topic "two-photon channel shows" 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

Considering removing "Show Preview" button on utility rate form...  

Open Energy Info (EERE)

Rate Rmckeel's picture Submitted by Rmckeel(287) Contributor 22 April, 2013 - 14:55 Utility Rates I'm considering removing the "Show Preview" button, since it does not work...

202

Pre-Show Report and Features on Selected Exhibitors  

Science Conference Proceedings (OSTI)

Nov 22, 2010 ... Pre-Show Report and Features on Selected .... about 12,000MT equivalent of coal and reduce 32,000MT of CO2 emission. Because of this ...

203

Study shows that 'brown carbon' contributes more to climate change...  

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

Study shows that 'brown carbon' contributes more to climate change than previously believed By Jared Sagoff * February 18, 2013 Tweet EmailPrint Much of the current effort toward...

204

ORISE: Report shows number of health physics degrees for 2010  

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

ORISE report shows number of health physics degrees increased for graduates, decreased for undergraduates in 2010 Decreased number of B.S. degrees remains higher than levels in the...

205

Does Roush show that evidence should be probable?  

E-Print Network (OSTI)

DOI 10.1007/s11229-009-9510-3 Does Roush show that evidencecondition. However, he does not adopt a condition similar toprovide leverage. She does not want P(h) to be presupposed

Fennell, Damien; Cartwright, Nancy

2010-01-01T23:59:59.000Z

206

DOE Releases New Analysis Showing Significant Advances in Electric Vehicle  

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

New Analysis Showing Significant Advances in Electric New Analysis Showing Significant Advances in Electric Vehicle Deployment DOE Releases New Analysis Showing Significant Advances in Electric Vehicle Deployment February 8, 2011 - 12:00am Addthis WASHINGTON - The U.S. Department of Energy today released One Million Electric Vehicles by 2015 (pdf - 220 kb), an analysis of advances in electric vehicle deployment and progress to date in meeting President Obama's goal of putting one million electric vehicles on the road by 2015. The analysis shows that while the goal is ambitious, it is also achievable based on steps already taken as part of the Recovery Act and additional policy initiatives proposed by President Obama -- including improvements to existing consumer tax credits, programs to help cities prepare for the growing demand for electric vehicles, and strong support

207

Steam-channel-expanding steam form drive  

SciTech Connect

In a viscous oil reservoir in which the stratification of the rock permeability is insufficient to confine steam within the most permeable strata, oil can be produced by forming and expanding a steam channel through which steam is flowed and oil is produced. Steam is injected and fluid is produced at rates causing a steam channel to be extended between locations that are horizontally separated. A foam-forming mixture of steam, noncondensable gas and surfactant is then injected into the steam channel to provide foam and a relatively high pressure gradient within the channel, without plugging the channel. A flow of steam-containing fluid through the steam channel is continued in a manner such that the magnitudes of the pressure gradient, the rate of oil production, and the rate of steam channel expansion exceed those which could be provided by steam alone. 10 claims, 6 figures.

Dilgren, R.E.; Hirasaki, G.J.; Hill, H.J.; Whitten, D.G.

1978-05-02T23:59:59.000Z

208

Cytoplasmic Domain Structures of Kir2.1 and Kir3.1 Shows Sites for  

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

Cytoplasmic Domain Structures of Cytoplasmic Domain Structures of Kir2.1 and Kir3.1 Shows Sites for Modulating Gating and Rectification Scott Pegan1, Christine Arrabit2, Wei Zhou1, Witek Kwiatkowski1, Anthony Collins3, Paul Slesinger2 and Senyon Choe1 Structural Biology1 and Peptide Biology2 Laboratories, The Salk Institute, La Jolla, Ca 92037; Department of Pharmaceutical Sciences3, College of Pharmacy, Oregon State University, Corvallis, OR 97331 Figure 1. Kir2.1 cytoplasmic domain's backbone and surface are highlighted in yellow merged with KirBac1.1 transmembrane region's backbone and surface in gray. The gate forming tip of the G-loop, amino acids 304-306, is highlighted in red. The family of inwardly-rectifying potassium (Kir) channels of eukaryotic cells are unique because they conduct K+ ions better in the inward than

209

State Home Oil Weatherization (SHOW) Program | Department of Energy  

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

Home Oil Weatherization (SHOW) Program Home Oil Weatherization (SHOW) Program State Home Oil Weatherization (SHOW) Program < Back Eligibility Multi-Family Residential Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heating Home Weatherization Commercial Weatherization Sealing Your Home Design & Remodeling Windows, Doors, & Skylights Ventilation Manufacturing Maximum Rebate $500/household Program Info State Oregon Program Type State Rebate Program Rebate Amount Blower-door test - 100% of the cost up to $100. All other technologies are 25% of the total cost, up to $150 or $500, depending on the upgrade. Provider Oregon Department of Energy Oregon homeowners and renters who heat with oil, wood, propane, kerosene, or butane are eligible for home weatherization rebates of up to $500. A

210

Biological Monitoring at Amchitka Appears to Show Impacts from Fukushima  

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

Biological Monitoring at Amchitka Appears to Show Impacts from Biological Monitoring at Amchitka Appears to Show Impacts from Fukushima Dai-ichi Incident Biological Monitoring at Amchitka Appears to Show Impacts from Fukushima Dai-ichi Incident April 12, 2013 - 3:09pm Addthis An LM scientist points to star reindeer lichen on Adak Island, Alaska. An LM scientist points to star reindeer lichen on Adak Island, Alaska. What does this project do? Goal 1. Protect human health and the environment The U.S. Department of Energy Office Legacy Management (LM) has a long-term stewardship mission to protect human health and the environment from the legacy of underground nuclear testing conducted at Amchitka Island, Alaska, from 1965 to 1971. As part of its mission, LM collected biological and seawater samples from Amchitka and Adak Islands, for background comparison,

211

Consumer Electronics Show 2013 Highlights Sustainable Energy Technology |  

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

Consumer Electronics Show 2013 Highlights Sustainable Energy Consumer Electronics Show 2013 Highlights Sustainable Energy Technology Consumer Electronics Show 2013 Highlights Sustainable Energy Technology January 18, 2013 - 4:52pm Addthis Excited attendees flood into the Central Hall exhibits to see the latest and greatest in technology at the 2013 International CES. | 2013 International CES Excited attendees flood into the Central Hall exhibits to see the latest and greatest in technology at the 2013 International CES. | 2013 International CES Erik Hyrkas Erik Hyrkas Media Relations Specialist, Office of Energy Efficiency & Renewable Energy What does this mean for me? Watch for the new sustainable technologies displayed at CES this year. Energy savings aren't all about efficient heating and cooling these days.

212

Nebraska shows potential to produce biofuel crops | Department of Energy  

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

Nebraska shows potential to produce biofuel crops Nebraska shows potential to produce biofuel crops Nebraska shows potential to produce biofuel crops December 9, 2009 - 11:12am Addthis Joshua DeLung What are the key facts? Utilizing sites in Nevada that are currently used as buffers around roads for biofuel production instead could meet up to 22 percent of the state's energy requirements. That's 11 times the energy the state currently produces from biomass. Nebraska is known for its rolling cornfields in America's heartland, and agriculture is so thick in the state that people there can smell the fresh produce in the air. Many more in the U.S. might end up tasting the hearty vegetables as well. But one concern about new technologies that use crops for fuel is that those crops, and the land on which they're grown,

213

Lumenhaus Shows Off Solar in Times Square | Department of Energy  

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

Lumenhaus Shows Off Solar in Times Square Lumenhaus Shows Off Solar in Times Square Lumenhaus Shows Off Solar in Times Square February 1, 2010 - 10:00am Addthis Photo by Kelly Shimoda Photo by Kelly Shimoda Joshua DeLung How can I participate? The next Solar Decathlon will be held Sept. 23-Oct. 2, 2011, at the National Mall's West Potomac Park in Washington, D.C. Virginia Tech's Lumenhaus - a net-zero energy, solar-powered, 650-square-foot home - made a stop in New York on its tour, right in the middle of Times Square. The house was previously featured at the U.S. Department of Energy's Solar Decathlon in October, and the team will head to Madrid in June for Solar Decathlon Europe as the only U.S. team to participate in both competitions. While in Times Square, the team and the house were featured on "Good

214

Small Businesses in Arkansas Show How America Competes | Department of  

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

Businesses in Arkansas Show How America Competes Businesses in Arkansas Show How America Competes Small Businesses in Arkansas Show How America Competes May 24, 2012 - 5:58pm Addthis Deputy Secretary Poneman tours Arkansas Power Electronics International as part of National Small Business Week. | Energy Department photo by Teryn Norris. Deputy Secretary Poneman tours Arkansas Power Electronics International as part of National Small Business Week. | Energy Department photo by Teryn Norris. Teryn Norris Special Assistant for Public Engagement, Office of the Secretary What are the key facts? Deputy Secretary Poneman announced $11 million in innovative research and technology grants of up to $150,000 to nearly 70 small businesses nationwide. America's economic leadership depends on small businesses, which create

215

New NASA Visualizations Show Two Futures of Climate Change  

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

NASA Visualizations Show Two Futures of Climate Change Print E-mail NASA Visualizations Show Two Futures of Climate Change Print E-mail Thursday, July 25, 2013 By Tara Failey Climate Scenarios Project Temperature and Precipitation in the U.S. through 2100 Curious to 'see' how different greenhouse gas emission scenarios are expected to impact the United States? Two recently released animated NASA visualizations developed to support the forthcoming third US National Climate Assessment show projections of Earth's temperature and precipitation patterns from today through the year 2100-revealing how "low" versus "high" emission scenarios would impact the planet's climate. "These visualizations communicate a picture of the impacts of climate change in a way that words do not," said Allison Leidner, Ph.D., a scientist who coordinates NASA's involvement in the National Climate Assessment. "When I look at the scenarios for future temperature and precipitation, I really see how dramatically our Nation's climate could change."

216

Moniz: Tesla Repayment Shows the Strength of Energy Department's Overall  

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

Moniz: Tesla Repayment Shows the Strength of Energy Department's Moniz: Tesla Repayment Shows the Strength of Energy Department's Overall Loan Portfolio Moniz: Tesla Repayment Shows the Strength of Energy Department's Overall Loan Portfolio May 22, 2013 - 4:24pm Addthis News Media Contact (202) 586-4940 WASHINGTON -- Today, Tesla Motors repaid the entire remaining balance on a $465 million loan from the Department of Energy nine years earlier than originally required. U.S. Energy Secretary Ernest Moniz made the following statement: "When you're talking about cutting-edge clean energy technologies, not every investment will succeed -- but today's repayment is the latest indication that the Energy Department's portfolio of more than 30 loans is delivering big results for the American economy while costing far less than anticipated.

217

Energy Innovation Hub Report Shows Philadelphia-area Building Retrofits  

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

Report Shows Philadelphia-area Building Report Shows Philadelphia-area Building Retrofits Could Support 23,500 Jobs Energy Innovation Hub Report Shows Philadelphia-area Building Retrofits Could Support 23,500 Jobs November 10, 2011 - 10:36am Addthis This is the Greater Philadelphia Innovation Cluster located at the Philadelphia Navy Yard, which has 270 buildings that consortium members can use to conduct energy efficiency experiments. The Energy Efficiency Buildings Hub is one of the U.S. Department of Energy’s research centers called Energy Innovation Hubs. | Photo courtesy of EEB Hub This is the Greater Philadelphia Innovation Cluster located at the Philadelphia Navy Yard, which has 270 buildings that consortium members can use to conduct energy efficiency experiments. The Energy Efficiency

218

Nebraska shows potential to produce biofuel crops | Department of Energy  

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

Nebraska shows potential to produce biofuel crops Nebraska shows potential to produce biofuel crops Nebraska shows potential to produce biofuel crops December 9, 2009 - 11:12am Addthis Joshua DeLung What are the key facts? Utilizing sites in Nevada that are currently used as buffers around roads for biofuel production instead could meet up to 22 percent of the state's energy requirements. That's 11 times the energy the state currently produces from biomass. Nebraska is known for its rolling cornfields in America's heartland, and agriculture is so thick in the state that people there can smell the fresh produce in the air. Many more in the U.S. might end up tasting the hearty vegetables as well. But one concern about new technologies that use crops for fuel is that those crops, and the land on which they're grown,

219

Consumer Electronics Show 2013 Highlights Sustainable Energy Technology |  

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

Consumer Electronics Show 2013 Highlights Sustainable Energy Consumer Electronics Show 2013 Highlights Sustainable Energy Technology Consumer Electronics Show 2013 Highlights Sustainable Energy Technology January 18, 2013 - 4:52pm Addthis Excited attendees flood into the Central Hall exhibits to see the latest and greatest in technology at the 2013 International CES. | 2013 International CES Excited attendees flood into the Central Hall exhibits to see the latest and greatest in technology at the 2013 International CES. | 2013 International CES Erik Hyrkas Erik Hyrkas Media Relations Specialist, Office of Energy Efficiency & Renewable Energy What does this mean for me? Watch for the new sustainable technologies displayed at CES this year. Energy savings aren't all about efficient heating and cooling these days.

220

Argonne CNM News: Time-Resolved Measurements Show Colloidal Nanoplatelets  

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

Time-Resolved Measurements Show Colloidal Nanoplatelets Act Like Quantum Wells Time-Resolved Measurements Show Colloidal Nanoplatelets Act Like Quantum Wells TEM image of CdSe nanoplatelets Schematic and transmission electron microscope (TEM) image of CdSe nanoplatelets with a thickness of 5 monolayers. The relaxation of high-energy carriers (electrons and holes) in colloidal nanoplatelets have been measured by researchers in the Nanophotonics Group at the Center for Nanoscale Materials, working with colleagues at the University of Chicago. The measurements show that the carriers behave like carriers in quantum wells. Quantum wells have found widespread application in optoelectronics, and the new results suggest that colloidal nanoplatelets should find similar applications, with the added advantage that they can be produced at low cost and in large quantities.

Note: This page contains sample records for the topic "two-photon channel shows" 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

Multiple channel programmable coincidence counter  

DOE Patents (OSTI)

A programmable digital coincidence counter having multiple channels and featuring minimal dead time. Neutron detectors supply electrical pulses to a synchronizing circuit which in turn inputs derandomized pulses to an adding circuit. A random access memory circuit connected as a programmable length shift register receives and shifts the sum of the pulses, and outputs to a serializer. A counter is input by the adding circuit and downcounted by the serializer, one pulse at a time. The decoded contents of the counter after each decrement is output to scalers.

Arnone, G.J.

1989-02-27T23:59:59.000Z

222

A Look Inside the Detroit Auto Show | Department of Energy  

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

A Look Inside the Detroit Auto Show A Look Inside the Detroit Auto Show A Look Inside the Detroit Auto Show January 12, 2011 - 1:15pm Addthis Kerry Duggan Waking up at 4:30AM is not my idea of fun. But after I witnessed the 6:30AM unveiling of the shiny new Porsche 918 RSR Hybrid at the North American International Auto Show, I got over it. To those who know cars, its lineage is in the #22 Porsche 917 race car, winner of the LeMans in 1971. With a top speed of 140 mph, the new 918 RSR combines the power of a 563-horsepower V-8 engine and a dual inertial flywheel system to produce a total 767-horsepower. On the efficiency side, a Kinetic Energy Recovery System (KERS) allows the two 75-kW flywheels to capture wasted energy when the brakes are applied. The Porsche president said that their goal is to achieve high fuel efficiency in extreme driving

223

Proceedings of the 7th Middle East oil show  

Science Conference Proceedings (OSTI)

This book contains the November, 1991 proceedings of the 7th Middle East Oil Show. It includes the following topics: Horizontal drilling; Emergency pipeline repair; Geologic interpretation and digital processing of satellite images; Fracturing patterns; Oil and gas saturation monitoring; and The environmental impact of oil spills.

Not Available

1991-01-01T23:59:59.000Z

224

A Look Inside the Detroit Auto Show | Department of Energy  

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

A Look Inside the Detroit Auto Show A Look Inside the Detroit Auto Show A Look Inside the Detroit Auto Show January 12, 2011 - 1:15pm Addthis Kerry Duggan Waking up at 4:30AM is not my idea of fun. But after I witnessed the 6:30AM unveiling of the shiny new Porsche 918 RSR Hybrid at the North American International Auto Show, I got over it. To those who know cars, its lineage is in the #22 Porsche 917 race car, winner of the LeMans in 1971. With a top speed of 140 mph, the new 918 RSR combines the power of a 563-horsepower V-8 engine and a dual inertial flywheel system to produce a total 767-horsepower. On the efficiency side, a Kinetic Energy Recovery System (KERS) allows the two 75-kW flywheels to capture wasted energy when the brakes are applied. The Porsche president said that their goal is to achieve high fuel efficiency in extreme driving

225

ORISE: Report shows number of health physics degrees for 2010  

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

report shows number of health physics degrees increased for report shows number of health physics degrees increased for graduates, decreased for undergraduates in 2010 Decreased number of B.S. degrees remains higher than levels in the early 2000 FOR IMMEDIATE RELEASE Dec. 20, 2011 FY12-09 OAK RIDGE, Tenn.-The number of health physics graduate degrees increased for both master's and doctoral candidates in 2010, but decreased for bachelor's degrees, says a report released this year by the Oak Ridge Institute for Science and Education. The ORISE report, Health Physics Enrollments and Degrees Survey, 2010 Data, surveyed 24 academic programs with enrollment and degree data and included students majoring in health physics or in an option program equivalent to a major, such as other health physics-based programs embedded in life

226

Study Shows Roles of Receptor, Thiol on Adaptive Response  

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

Study Shows Roles of Receptor, Thiol on Adaptive Response Study Shows Roles of Receptor, Thiol on Adaptive Response Jeffrey Murley Jeffrey Murley, Ph.D. David Grdina, Ph.D. Low Dose program-supported scientists at The University of Chicago have gained more insight into adaptive protective responses indicating the role of oxidative stress, the role of reactive oxygen species (ROS), and the induction of SOD2 (manganese Superoxide Dismutase) activity. These changes are central to the production of adaptive protective responses. Why Study Adaptive Response? Exposing cells to low doses of ionizing radiation has been reported to elevate resistance to genomic damage when the same cells are subsequently exposed to a much higher dose of radiation. This phenomenon, called adaptive response, is characterized by an increase

227

Study Shows Significant Economic Impact from Recovery Act  

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

May 03, 2011 May 03, 2011 Study Shows Significant Economic Impact from Recovery Act AIKEN, S.C. - A study recently released shows the $1.6 billion the Savannah River Site (SRS) received from the American Recovery and Reinvestment Act has had a positive economic impact on the adjacent five-county region. The study's findings were presented at the University of South Carolina Aiken's (USC Aiken) Convocation Center. More than 75 people attended the meeting, where presenters commended the Recovery Act for accelerating Cold War cleanup at SRS and boosting employment and business in the local community. "I go out to the sites and talk to the people in the communities," EM Chief Operations Officer Cynthia Anderson said at the meeting. "The Recovery Act is

228

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress  

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

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress Print Dynein Motor Domain Shows Ring-Shaped Motor, Buttress Print Movement is fundamental to life. It takes place even at the cellular level where cargo is continually being transported by motor proteins. These tiny machines convert the energy gained from hydrolysing ATP into a series of small conformational changes that allow them to literally "walk" along microscopic tracks. Motor proteins (in the kinesin and myosin families) have been extensively studied by x-ray crystallography, but until recently there was little molecular structural information for dyneins, another type of motor protein. A group from the University of California, San Francisco, working at ALS Beamline 8.3.1 has reported the 6-Ã…-resolution structure of the motor domain of dynein in yeast. It reveals details of the ring-shaped motor as well as a new, unanticipated feature called the buttress that may play an important role in dynein's mechanical cycle.

229

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress  

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

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress Print Dynein Motor Domain Shows Ring-Shaped Motor, Buttress Print Movement is fundamental to life. It takes place even at the cellular level where cargo is continually being transported by motor proteins. These tiny machines convert the energy gained from hydrolysing ATP into a series of small conformational changes that allow them to literally "walk" along microscopic tracks. Motor proteins (in the kinesin and myosin families) have been extensively studied by x-ray crystallography, but until recently there was little molecular structural information for dyneins, another type of motor protein. A group from the University of California, San Francisco, working at ALS Beamline 8.3.1 has reported the 6-Ã…-resolution structure of the motor domain of dynein in yeast. It reveals details of the ring-shaped motor as well as a new, unanticipated feature called the buttress that may play an important role in dynein's mechanical cycle.

230

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress  

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

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress Print Dynein Motor Domain Shows Ring-Shaped Motor, Buttress Print Movement is fundamental to life. It takes place even at the cellular level where cargo is continually being transported by motor proteins. These tiny machines convert the energy gained from hydrolysing ATP into a series of small conformational changes that allow them to literally "walk" along microscopic tracks. Motor proteins (in the kinesin and myosin families) have been extensively studied by x-ray crystallography, but until recently there was little molecular structural information for dyneins, another type of motor protein. A group from the University of California, San Francisco, working at ALS Beamline 8.3.1 has reported the 6-Ã…-resolution structure of the motor domain of dynein in yeast. It reveals details of the ring-shaped motor as well as a new, unanticipated feature called the buttress that may play an important role in dynein's mechanical cycle.

231

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress  

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

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress Print Dynein Motor Domain Shows Ring-Shaped Motor, Buttress Print Movement is fundamental to life. It takes place even at the cellular level where cargo is continually being transported by motor proteins. These tiny machines convert the energy gained from hydrolysing ATP into a series of small conformational changes that allow them to literally "walk" along microscopic tracks. Motor proteins (in the kinesin and myosin families) have been extensively studied by x-ray crystallography, but until recently there was little molecular structural information for dyneins, another type of motor protein. A group from the University of California, San Francisco, working at ALS Beamline 8.3.1 has reported the 6-Ã…-resolution structure of the motor domain of dynein in yeast. It reveals details of the ring-shaped motor as well as a new, unanticipated feature called the buttress that may play an important role in dynein's mechanical cycle.

232

Secretary Chu Visits the 2012 North American International Auto Show |  

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

Chu Visits the 2012 North American International Auto Chu Visits the 2012 North American International Auto Show Secretary Chu Visits the 2012 North American International Auto Show January 12, 2012 - 9:54am Addthis 1 of 10 Energy Secretary Steven Chu with Chrysler Chief Executive Sergio Marchionne. Image: Hantz Leger (Energy Department Contractor) Date taken: 2012-01-10 00:00 2 of 10 Energy Secretary Steven Chu examines the Dodge Dart's four cylinder, 2.4-liter, 184 horsepower engine block. Image: Hantz Leger (Energy Department Contractor) Date taken: 2012-01-10 00:00 3 of 10 Energy Secretary Steven Chu gets behind the wheel of the new 2013 Dodge Dart. Image: Hantz Leger (Energy Department Contractor) Date taken: 2012-01-10 00:00 4 of 10 Energy Secretary Steven Chu examines the interior of the new 2013 Dodge Dart. Image: Hantz Leger (Energy Department Contractor)

233

Secretary Chu Visits the 2012 North American International Auto Show |  

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

Secretary Chu Visits the 2012 North American International Auto Secretary Chu Visits the 2012 North American International Auto Show Secretary Chu Visits the 2012 North American International Auto Show January 12, 2012 - 9:54am Addthis 1 of 10 Energy Secretary Steven Chu with Chrysler Chief Executive Sergio Marchionne. Image: Hantz Leger (Energy Department Contractor) Date taken: 2012-01-10 00:00 2 of 10 Energy Secretary Steven Chu examines the Dodge Dart's four cylinder, 2.4-liter, 184 horsepower engine block. Image: Hantz Leger (Energy Department Contractor) Date taken: 2012-01-10 00:00 3 of 10 Energy Secretary Steven Chu gets behind the wheel of the new 2013 Dodge Dart. Image: Hantz Leger (Energy Department Contractor) Date taken: 2012-01-10 00:00 4 of 10 Energy Secretary Steven Chu examines the interior of the new 2013 Dodge

234

JSON shows incomplete info | OpenEI Community  

Open Energy Info (EERE)

JSON shows incomplete info JSON shows incomplete info Home > Groups > Utility Rate I pointed this out this bug a while ago, but I'm re-posting since it still hasn't been resolved. I have found several rates where the JSON file doesn't show all of the information shown in the web interface. This is not an approval issue since I see it on both rates that say "This is the approved revision of this page, as well as being the most recent." and "No revision has been approved for this page. It is currently under review by our subject matter experts." Here is an example: http://en.openei.org/wiki/Data:0a897297-e17e-42c0-8f40-8db41b44b004 http://en.openei.org/services/rest/utility_rates?version=latest&format=json_plain&detail=full&getpage=Data:0a897297-e17e-42c0-8f40-8db41b44b004

235

Applying Alpha-Channeling to Mirror Machines  

SciTech Connect

The ?-channeling effect entails the use of radio-frequency waves to expel and cool high-energetic ?- particles born in a fusion reactor; the device reactivity can then be increased even further by redirecting the extracted energy to fuel ions. Originally proposed for tokamaks, this technique has also been shown to benefi t open-ended fusion devices. Here, the fundamental theory and practical aspects of ?- channeling in mirror machines are reviewed, including the influence of magnetic field inhomogeneity and the effect of a finite wave region on the ?-channeling mechanism. For practical implementation of the ? -channeling effect in mirror geometry, suitable contained weakly-damped modes are identifi ed. In addition, the parameter space of candidate waves for implementing the ? -channeling effect can be signi cantly extended through the introduction of a suitable minority ion species that has the catalytic effect of moderating the transfer of power from the ?-channeling wave to the fuel ions.

A.I. Zhmoginov and N.J. Fisch

2012-03-16T23:59:59.000Z

236

MHL Free Surface Channel | Open Energy Information  

Open Energy Info (EERE)

MHL Free Surface Channel MHL Free Surface Channel Jump to: navigation, search Basic Specifications Facility Name MHL Free Surface Channel Overseeing Organization University of Michigan Hydrodynamics Hydrodynamic Testing Facility Type Channel Beam(m) 1.0 Depth(m) 0.6 Cost(per day) $2000 (+ Labor/Materials) Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 2 Wavemaking Capabilities Wavemaking Capabilities None Channel/Tunnel/Flume Channel/Tunnel/Flume Yes Velocity(m/s) 2 Recirculating No Wind Capabilities Wind Capabilities None Control and Data Acquisition Description Custom Data Acquisition System using National Instruments hardware; system compatible with Planing Hull and Floating Beam Dynamometers Custom Data Acquisition System using National Instruments hardware; system compatible with Planing Hull and Floating Beam Dynamometers

237

Entanglement Transmission Capacity of Compound Channels  

E-Print Network (OSTI)

We determine the optimal achievable rate at which entanglement can be reliably transmitted when the memoryless channel used during transmission is unknown both to sender and receiver. To be more precise, we assume that both of them only know that the channel belongs to a given set of channels. Thus, they have to use encoding and decoding schemes that work well for the whole set.

Igor Bjelakovic; Holger Boche; Janis Noetzel

2009-04-20T23:59:59.000Z

238

Electricity show and related educational programming. Final report  

SciTech Connect

The on-site version of Balance of Power reached a total audience of 21,331 between November 10, 1994 and January 31, 1996; in addition, the Physics on Wheels van offered exhibits and programs to an additional 30,000 students in the 1995-1996 school year. The program provided a groundbreaking new approach to informal science education, combining a dynamic demonstration with an intensely interactive game show. Between the on-site programming and the Physics on Wheels van programs, 51,331 students were impacted by the activities, exhibits and energy-conservation message of Balance of Power.

1997-03-19T23:59:59.000Z

239

Propagation of premixed flames in confined channels.  

E-Print Network (OSTI)

??The propagation of premixed flames in confined channels is investigated. In the unconfined case, the structure of the flame and the flame speed for the… (more)

Navaneetha, Arjun

2013-01-01T23:59:59.000Z

240

Environmental Highlights of the 2007 Tokyo Motor Show  

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

2 2 0 0 0 0 7 7 T T o o k k y y o o M M o o t t o o r r S S h h o o w w K K e e i i t t h h H H a a r r d d y y Page 2 of 21 The Tokyo Motor Show covers a broad range of vehicle technologies, e.g., commercial vehicles were incorporated this year, and many of the new concepts are either hybrid or electric (some examples above). But the high-level message is essentially the same as the other shows in the past year - environmental technology is an integral part of the major manufacturers" plans, including improved engines and after-treatment, lightweight materials, new propulsion systems and alternative fuels. And in response to the push in the States, plug-in hybrid electric vehicles (PHEVs) are being explored by several manufacturers. In fact, there is some interesting

Note: This page contains sample records for the topic "two-photon channel shows" 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

NETL: News Release - Innovative Mercury Removal Technique Shows Early  

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

August 5, 2003 August 5, 2003 Innovative Mercury Removal Technique Shows Early Promise Photochemical Process Developed in Federal Lab Removes Mercury from Flue Gas - NETL scientist Evan Granite prepares a lab test of the UV mercury removal process. - NETL scientist Evan Granite prepares for a lab test of the UV mercury removal process. MORGANTOWN, WV - A promising technology to remove mercury from coal-fired power plants -- dubbed the "GP-254 Process" -- has been developed and is currently being tested at the Department of Energy's National Energy Technology Laboratory (NETL). Newly patented, the GP-254 Process enhances mercury removal using ultraviolet light to induce various components of power plant stack gas to react with the mercury, and changes the

242

Analysis of Lake Washington Microbes Shows the Power of Metagenomic  

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

8, 2008 8, 2008 Analysis of Lake Washington Microbes Shows the Power of Metagenomic Approaches WALNUT CREEK, CA-Today's powerful sequencing machines can rapidly read the genomes of entire communities of microbes, but the challenge is to extract meaningful information from the jumbled reams of data. In a paper appearing in Nature Biotechnology August 17, a collaboration headed by researchers at the University of Washington and the U.S. Department of Energy Joint Genome Institute (DOE JGI) describes a novel approach for extracting single genomes and discerning specific microbial capabilities from mixed community ("metagenomic") sequence data. Methylamine-enriched community of Lake Washington Methylamine-enriched community of Lake Washington sediment featuring

243

Organic Polymers Show Sunny Potential | Advanced Photon Source  

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

A New Family of Quasicrystals A New Family of Quasicrystals Cool Muscles: Storing Elastic Energy for Flight A Further Understanding of Superconductivity New Family of Tiny Crystals Glow Bright in LED Lights How Serotonin Receptors Can Shape Drug Effects, from LSD to Migraine Medication Science Highlights Archives: 2013 | 2012 | 2011 | 2010 2009 | 2008 | 2007 | 2006 2005 | 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed Organic Polymers Show Sunny Potential JUNE 25, 2013 Bookmark and Share Researchers at Rice and Pennsylvania State universities have created solar cells based on block copolymers, self-assembling organic materials that arrange themselves into distinct layers. Image courtesy of the Gomez Laboratory A new version of solar cells created by laboratories at the Rice and

244

The classical capacity of quantum channels with memory  

E-Print Network (OSTI)

We investigate the classical capacity of two quantum channels with memory: a periodic channel with depolarizing channel branches, and a convex combination of depolarizing channels. We prove that the capacity is additive in both cases. As a result, the channel capacity is achieved without the use of entangled input states. In the case of a convex combination of depolarizing channels the proof provided can be extended to other quantum channels whose classical capacity has been proved to be additive in the memoryless case.

Tony Dorlas; Ciara Morgan

2009-02-17T23:59:59.000Z

245

The classical capacity of quantum channels with memory  

E-Print Network (OSTI)

We investigate the classical capacity of two quantum channels with memory: a periodic channel with depolarizing channel branches, and a convex combination of depolarizing channels. We prove that the capacity is additive in both cases. As a result, the channel capacity is achieved without the use of entangled input states. In the case of a convex combination of depolarizing channels the proof provided can be extended to other quantum channels whose classical capacity has been proved to be additive in the memoryless case.

Dorlas, Tony

2009-01-01T23:59:59.000Z

246

Sphere Lower Bound for Rotated Lattice Constellations in Fading Channels  

E-Print Network (OSTI)

We study the error probability performance of rotated lattice constellations in frequency-flat Nakagami-$m$ block-fading channels. In particular, we use the sphere lower bound on the underlying infinite lattice as a performance benchmark. We show that the sphere lower bound has full diversity. We observe that optimally rotated lattices with largest known minimum product distance perform very close to the lower bound, while the ensemble of random rotations is shown to lack diversity and perform far from it.

Fabregas, Albert Guillen i

2007-01-01T23:59:59.000Z

247

Single electron quantum tomography in quantum Hall edge channels  

E-Print Network (OSTI)

We propose a quantum tomography protocol to measure single electron coherence in quantum Hall edge channels and therefore access for the first time the wave function of single electron excitations propagating in ballistic quantum conductors. Its implementation would open the way to quantitative studies of single electron decoherence and would provide a quantitative tool for analyzing single to few electron sources. We show how this protocol could be implemented using ultrahigh sensitivity noise measurement schemes.

Grenier, Charles; Bocquillon, Erwann; Parmentier, François D; Plaçais, Bernard; Berroir, Jean-Marc; Fève, Gwendal; Degiovanni, Pascal; 10.1088/1367-2630/13/9/093007

2011-01-01T23:59:59.000Z

248

Single electron quantum tomography in quantum Hall edge channels  

E-Print Network (OSTI)

We propose a quantum tomography protocol to measure single electron coherence in quantum Hall edge channels and therefore access for the first time the wave function of single electron excitations propagating in ballistic quantum conductors. Its implementation would open the way to quantitative studies of single electron decoherence and would provide a quantitative tool for analyzing single to few electron sources. We show how this protocol could be implemented using ultrahigh sensitivity noise measurement schemes.

Charles Grenier; Rémy Hervé; Erwann Bocquillon; François D. Parmentier; Bernard Plaçais; Jean-Marc Berroir; Gwendal Fève; Pascal Degiovanni

2010-10-11T23:59:59.000Z

249

Bunch Coalescing in a Helical Channel  

Science Conference Proceedings (OSTI)

A high-luminosity Muon Collider requires bunch recombination for optimal luminosity. In this paper, we take advantage of the large slip factor attainable in a helical transport channel (HTC) to coalesce bunches of muons into a single one over a shorter distance than can be achieved over a straight channel.

Neuffer, D.V.; Yonehara, K.; /Fermilab; Ankenbrandt, C.M.; Yoshikawa, C.Y.; /MUONS Inc., Batavia

2012-05-01T23:59:59.000Z

250

Probabilistic secret sharing through noisy quantum channel  

Science Conference Proceedings (OSTI)

In a realistic situation, the secret sharing of classical or quantum information will involve the transmission of this information through noisy channels. We consider a three qubit pure state. This state becomes a mixed-state when the qubits are distributed ... Keywords: GHZ states, POVM, phase damping channel, secret sharing

Satyabrata Adhikari; Indranil Chakrabarty; Pankaj Agrawal

2012-03-01T23:59:59.000Z

251

UWB channel measurements for accurate indoor localization  

Science Conference Proceedings (OSTI)

Recently, indoor localization has attracted considerable attention. More importantly, indoor channel measurements and models are very essential to accurate characterization of the ranging error for military applications. This paper provides the results ... Keywords: channel measurement, geolocation, path loss, ranging, ultra-wideband

Bardia Alavi; Nayef Alsindi; Kaveh Pahlavan

2006-10-01T23:59:59.000Z

252

Value-passing CCS with noisy channels  

Science Conference Proceedings (OSTI)

Value-passing CCS, a full version of Milner's CCS, is a process algebra in which actions consist of sending and receiving values through noiseless communication channels. The full calculus is a succinct yet expressive language for the specification and ... Keywords: Barbed congruence, Bisimilarity, Noisy channel, Probabilistic modal logic, Value-passing CCS

Shuqin Huang; Yongzhi Cao; Hanpin Wang; Wanling Qu

2012-05-01T23:59:59.000Z

253

Carderock Circulating Water Channel | Open Energy Information  

Open Energy Info (EERE)

Circulating Water Channel Circulating Water Channel Jump to: navigation, search Basic Specifications Facility Name Carderock Circulating Water Channel Overseeing Organization United States Naval Surface Warfare Center Hydrodynamic Testing Facility Type Channel Length(m) 18.3 Beam(m) 6.7 Depth(m) 2.7 Water Type Freshwater Cost(per day) Contact POC Special Physical Features The Circulating Water Channel is a vertical plane, open to the atmosphere test section with a free surface in a closed recirculating water circuit, variable speed, rectangular cross-sectional shape facility. There are 10 large viewing windows on either side of the test section at different elevations and 9 in the bottom; movable bridge spans the test section for ease and versatility in mounting models, rigging bridge is capable of taking towing loads at any one of numerous points up to 35,584 N

254

The Last Piece of the Puzzle: Celebrating the Higgs Boson | Department of  

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

The Last Piece of the Puzzle: Celebrating the Higgs Boson The Last Piece of the Puzzle: Celebrating the Higgs Boson The Last Piece of the Puzzle: Celebrating the Higgs Boson July 5, 2012 - 4:07pm Addthis A simulation of the two-photon channel shows what ATLAS sees when the decay of a Higgs boson results in the production of two gamma rays. The blue beads indicate intermediate massive particles, and the bright green rods are the gamma-ray tracks. While the two-photon channel is the least likely Higgs decay, it is easier to observe than others with even noisier backgrounds. | Photo courtesy of Lawrence Livermore National Lab A simulation of the two-photon channel shows what ATLAS sees when the decay of a Higgs boson results in the production of two gamma rays. The blue beads indicate intermediate massive particles, and the bright green rods

255

IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 53, NO. 2, FEBRUARY 2005 335 On the Capacity Limits of HVAC Duct Channel for  

E-Print Network (OSTI)

of HVAC Duct Channel for High-Speed Internet Access Ariton E. Xhafa, Member, IEEE, Ozan K. Tonguz, Member and experimental channel-capacity estimates of heating, ventilation, and air condi- tioning (HVAC) ducts based suppressed. Our experimental results also show that even in the case of more complex HVAC duct networks (i

Stancil, Daniel D.

256

Consumer behaviour at multi-channel retailers  

E-Print Network (OSTI)

Consumer behaviour at pure Internet players has been analysed thoroughly in earlier work. When it comes to retailers with multiple distribution channels, however, new behaviour patterns can be observed. Given the fact that multi-channel retailing is much more common than Internet-only, the analysis of consumer behaviour in a multi-channel context constitutes a challenge for the deeper understanding of e-business. The contribution of this research is threefold: first, this study provides an overview of how the 50 largest e-retailers presently coordinate the interaction between sales on their web sites and in physical stores. Second, we present findings from a consumer survey suggesting what consumers like about multi-channel services on retail sites. Finally, user behaviour is empirically evaluated based on transaction and web log data from a large multi-channel retailer. The results indicate a strong demand for multi-channel services and suggest that retailers should expand their multi-channel service spectrum.

Maximilian Teltzrow; Bettina Berendt; Oliver Günther

2003-01-01T23:59:59.000Z

257

Coded modulation in the block-fading channel: coding theorems and code construction  

Science Conference Proceedings (OSTI)

We consider coded modulation schemes for the block-fading channel. In the setting where a codeword spans a finite number N of fading degrees of freedom, we show that coded modulations of rate R bit per complex dimension, over a finite signal set ??C ... Keywords: Block-fading channels, bit-interleaved coded modulation, concatenated codes, distance spectrum, diversity, iterative decoding, maximum distance-separable (MDS) codes, maximum-likelihood (ML) decoding, outage probability

A. Guillen i Fabregas; G. Caire

2006-01-01T23:59:59.000Z

258

Security bound of continuous-variable quantum key distribution with noisy coherent states and channel  

E-Print Network (OSTI)

Security of a continuous-variable quantum key distribution protocol based on noisy coherent states and channel is analyzed. Assuming the noise of coherent states is induced by Fred, a neutral party relative to others, we prove that the prepare and measurement scheme and entanglement-based scheme are equivalent. Then, we show that this protocol is secure against Gaussian collective attacks even if the channel is lossy and noisy, and further, a lower bound to the secure key rate is derived.

Yong Shen; Jian Yang; Hong Guo

2009-04-08T23:59:59.000Z

259

Economic analyses of alpha channeling in tokamak power plants.  

SciTech Connect

The hot-ion-mode of operation [1] has long been thought to offer optimized performance for long-pulse or steady-state magnetic fusion power plants. This concept was revived in recent years when theoretical considerations suggested that nonthermal fusion alpha particles could be made to channel their power density preferentially to the fuel ions [2,3]. This so-called anomalous alpha particle slowing down can create plasmas with fuel ion temperate T{sub i} somewhat larger than the electron temperature T{sub e}, which puts more of the beta-limited plasma pressure into the useful fuel species (rather than non-reacting electrons). As we show here, this perceived benefit may be negligible or nonexistent for tokamaks with steady state current drive. It has likewise been argued [2,3] that alpha channeling could be arranged such that little or no external power would be needed to generate the steady state toroidal current. Under optimistic assumptions we show that such alpha-channeling current drive would moderately improve the economic performance of a first stability tokamak like ARIES-I [4], however a reversed-shear (advanced equilibrium) tokamak would likely not benefit since traditional radio-wave (rf) electron-heating current drive power would already be quite small.

Ehst, D.A.

1998-09-17T23:59:59.000Z

260

Characteristics of crystallization of complex plasmas in narrow channels  

SciTech Connect

Molecular dynamics simulations are performed to analyze the dependence of the behavior of complex (dusty) plasmas in narrow three-dimensional channels on the confining potential. Dynamics of micrometer-sized particles is modeled by using Langevin thermostat and Yukawa (screened Coulomb) pair interaction potential. A detailed analysis shows that confinement strongly affects plasma crystallization characteristics and local ordering of dust grains. In particular, the formation of a new, quasi-crystalline phase induced by hard-wall confinement is revealed. Transitions between different lattice symmetries induced by changes in channel width are examined. Strong dependence of the transverse dust density profile on the shielding parameter (ratio between mean interparticle distance and screening length) can be used to manipulate the dust-grain flux in such a system.

Klumov, B. A., E-mail: klumov@mpe.pmg.de; Morfill, G. E. [Max-Planck-Institut fuer Extraterrestrische Physik (Germany)

2008-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "two-photon channel shows" 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

TWO-CHANNEL DIELECTRIC WAKE FIELD ACCELERATOR  

SciTech Connect

Experimental results are reported for test beam acceleration and deflection in a two-channel, cm-scale, rectangular dielectric-lined wakefield accelerator structure energized by a 14-MeV drive beam. The dominant waveguide mode of the structure is at {approx}30 GHz, and the structure is configured to exhibit a high transformer ratio ({approx}12:1). Accelerated bunches in the narrow secondary channel of the structure are continuously energized via Cherenkov radiation that is emitted by a drive bunch moving in the wider primary channel. Observed energy gains and losses, transverse deflections, and changes in the test bunch charge distribution compare favorably with predictions of theory.

Jay L. Hirshfield

2012-05-30T23:59:59.000Z

262

Complete Muon Cooling Channel Design and Simulations  

Science Conference Proceedings (OSTI)

Considerable progress has been made in developing promising subsystems for muon beam cooling channels to provide the extraordinary reduction of emittances required for an energy-frontier muon collider. However, it has not yet been demonstrated that the various proposed cooling subsystems can be consolidated into an integrated end-to-end design. Presented here are concepts to address the matching of transverse emittances between subsystems through an extension of the theoretical framework of the Helical Cooling Channel (HCC), which allows a general analytical approach to guide the transition from one set of cooling channel parameters to another.

Neuffer, D.V.; /Fermilab; Ankenbrandt, C.M.; Johnson, R.P.; Yoshikawa, C.Y.; /MUONS Inc., Batavia; Derbenev, Y.S.; Morozov, V.S.; /Jefferson Lab

2012-05-01T23:59:59.000Z

263

Complete Muon Cooling Channel Design and Simulations  

SciTech Connect

Considerable progress has been made in developing promising subsystems for muon beam cooling channels to provide the extraordinary reduction of emittances required for an energy-frontier muon collider. However, it has not yet been demonstrated that the various proposed cooling subsystems can be consolidated into an integrated end-to-end design. Presented here are concepts to address the matching of transverse emittances between subsystems through an extension of the theoretical framework of the Helical Cooling Channel (HCC), which allows a general analytical approach to guide the transition from one set of cooling channel parameters to another.

C. Y. Yoshikawa, C.M. Ankenbrandt, R.P. Johnson, Y.S. Derbenev, V.S. Morozov, D.V. Neuffer, K. Yonehara

2012-07-01T23:59:59.000Z

264

Image Source Separation Using Color Channel Dependencies  

Science Conference Proceedings (OSTI)

We investigate the problem of source separation in images in the Bayesian framework using the color channel dependencies. As a case in point we consider the source separation of color images which have dependence between its components. A Markov Random ...

Koray Kayabol; Ercan E. Kuruoglu; Bulent Sankur

2009-03-01T23:59:59.000Z

265

Scripps Channel 1 | Open Energy Information  

Open Energy Info (EERE)

Scripps Channel 1 Scripps Channel 1 Jump to: navigation, search Basic Specifications Facility Name Scripps Channel 1 Overseeing Organization University of California, San Diego (Scripps) Hydrodynamic Testing Facility Type Channel Length(m) 44.5 Beam(m) 2.4 Depth(m) 2.4 Cost(per day) Contact POC Special Physical Features Strategically placed windows, longest being 5.5m, allow optical access from side Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 2 Length of Effective Tow(m) 7.0 Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.6 Maximum Wave Height(m) at Wave Period(s) 10.0 Wave Period Range(s) 10.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Function Generator or user provided Wave Direction Uni-Directional

266

Scripps Channel 2 | Open Energy Information  

Open Energy Info (EERE)

Channel 2 Channel 2 Jump to: navigation, search Basic Specifications Facility Name Scripps Channel 2 Overseeing Organization University of California, San Diego (Scripps) Hydrodynamic Testing Facility Type Channel Length(m) 33.0 Beam(m) 0.5 Depth(m) 0.5 Cost(per day) Contact POC Special Physical Features All side walls and 11m of the tank bottom are glass to provide optical access. Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 0.7 Length of Effective Tow(m) 20.0 Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.3 Maximum Wave Height(m) at Wave Period(s) 10.0 Wave Period Range(s) 0.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Function Generator or user provided Wave Direction Uni-Directional

267

Vicarious Calibration of the Meteosat Visible Channel  

Science Conference Proceedings (OSTI)

Postlaunch calibration of the Meteosat visible (VIS) channel has been performed with Meteosat-1, Meteosat-2, and Meteosat-4. The radiance at the satellite radiometer aperture has been determined by independent means and has been related to the ...

Karl-Theodor Kriebel; Volker Amann

1993-04-01T23:59:59.000Z

268

On concepts of performance parameters for channels  

Science Conference Proceedings (OSTI)

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

R. Ahlswede

2006-01-01T23:59:59.000Z

269

Fair resource allocation in multiple access channels  

E-Print Network (OSTI)

We consider the problem of resource allocation in a multiple access channel. Our objective is to obtain rate and power allocation policies that maximize a general concave utility function of average transmission rates over ...

ParandehGheibi, Ali

2008-01-01T23:59:59.000Z

270

Turbulent Channel Flows on a Rotating Earth  

Science Conference Proceedings (OSTI)

This paper deals with flow in a rectilinear channel on a rotating earth. The flow is directed perpendicular to the background planetary vorticity; both an analytical theory and numerical simulations are employed. The analytical approach assumes ...

Robert A. Handler; Richard P. Mied; Gloria J. Lindemann; Thomas E. Evans

2009-04-01T23:59:59.000Z

271

Multi-channel neutral analyzer-system  

DOE Green Energy (OSTI)

Design and calibration of a 15 channel multi-channel analyzer for analysis of energetic neutral particles escaping a hot plasma are discussed. Features of the analyzer include a frequency response from DC to 50 kHz, spatial resolution, mass resolution, and data acquisition and processing for 15 points on the energy distribution that are simultaneously recorded. Another feature of the system is the ability to radially scan the plasma. An rf ion source is used to provide ions and neutrals used for calibration of a reference single channel analyzer. This analyzer is, in turn, used to calibrate the multi-channel analyzer over the energy range 500 eV to 40 keV. A brief description of the data processing system is included. (RME)

Nexsen, Jr., W. E.; Turner, W. C.; Cummins, W. F.

1977-09-14T23:59:59.000Z

272

Message passing with queues and channels  

Science Conference Proceedings (OSTI)

In an embodiment, a send thread receives an identifier that identifies a destination node and a pointer to data. The send thread creates a first send request in response to the receipt of the identifier and the data pointer. The send thread selects a selected channel from among a plurality of channels. The selected channel comprises a selected hand-off queue and an identification of a selected message unit. Each of the channels identifies a different message unit. The selected hand-off queue is randomly accessible. If the selected hand-off queue contains an available entry, the send thread adds the first send request to the selected hand-off queue. If the selected hand-off queue does not contain an available entry, the send thread removes a second send request from the selected hand-off queue and sends the second send request to the selected message unit.

Dozsa, Gabor J; Heidelberger, Philip; Kumar, Sameer; Ratterman, Joseph D; Steinmacher-Burow, Burkhard; Wisniewski, Robert W

2013-09-24T23:59:59.000Z

273

On the capacity of bosonic channels  

E-Print Network (OSTI)

The capacity of the bosonic channel with additive Gaussian noise is unknown, but there is a known lower bound that is conjectured to be the capacity. We have quantified the gap that exists between this known achievable ...

Blake, Christopher Graham

2011-01-01T23:59:59.000Z

274

On Entropy Transmission for Quantum Channels  

E-Print Network (OSTI)

In this paper a notion of entropy transmission of quantum channels is introduced as a natural extension of Ohya's entropy. Here by quantum channel is meant unital completely positive mappings (ucp) of $B(H)$ into itself, where $H$ is an infinite dimensional Hilbert space. Using a representation theorem of ucp mapping we associate to every ucp map a uniquely determined state, and prove that entropy of ucp map is less then Ohya's entropy of the associated state.

Nasir Ganikhodjaev; Farrukh Mukhamedov

2007-03-26T23:59:59.000Z

275

Quantum capacity of channel with thermal noise  

E-Print Network (OSTI)

The quantum capacity of thermal noise channel is studied. The extremal input state is obtained at the postulation that the coherent information is convex or concave at its vicinity. When the input energy tends to infinitive, it is verified by perturbation theory that the coherent information reaches its maximum at the product of identical thermal state input. The quantum capacity is obtained for lower noise channel and it is equal the one shot capacity.

Xiao-yu Chen

2006-02-11T23:59:59.000Z

276

The Capacity Region of the Cognitive Z-interference Channel with One Noiseless Component  

E-Print Network (OSTI)

We study the discrete memoryless Z-interference channel (ZIC) where the transmitter of the pair that suffers from interference is cognitive. We first provide upper and lower bounds on the capacity of this channel. We then show that, when the channel of the transmitter-receiver pair that does not face interference is noiseless, the two bounds coincide and therefore yield the capacity region. The obtained results imply that, unlike in the Gaussian cognitive ZIC, in the considered channel superposition encoding at the non-cognitive transmitter as well as Gel’fand-Pinsker encoding at the cognitive transmitter are needed in order to minimize the impact of interference. As a byproduct of the obtained capacity region, we obtain the capacity result for a generalized Gel’fand-Pinsker problem.

Nan Liu; Ivana Mari?; Andrea J. Goldsmith; Shlomo Shamai (Shitz)

2008-01-01T23:59:59.000Z

277

Ushering Buyers into Electronic Channels: An Empirical Analysis  

Science Conference Proceedings (OSTI)

Despite many success stories, B2B e-commerce penetration remains low. Many firms introduce electronic channels in addition to their traditional sales channels but find that buyer usage of the e-channel over time does not keep up with initial expectations. ... Keywords: buyer heterogeneity, channel choice, electronic markets

Nishtha Langer; Chris Forman; Sunder Kekre; Baohong Sun

2012-12-01T23:59:59.000Z

278

Channel Selection in Multi-channel Opportunistic Spectrum Access Networks with  

E-Print Network (OSTI)

Channel Selection in Multi-channel Opportunistic Spectrum Access Networks with Perfect Sensing Xin and utilized by primary users (PU). In dynamic spectrum access networks, the protection of PU's is vital, since no PU would accommo- date SU access to its own detriment. Therefore the objective of the problem we

Liu, Xin

279

Coupled-channel continuum eigenchannel basis  

E-Print Network (OSTI)

The goal of this paper is to calculate bound, resonant and scattering states in the coupled-channel formalism without relying on the boundary conditions at large distances. The coupled-channel solution is expanded in eigenchannel bases i.e. in eigenfunctions of diagonal Hamiltonians. Each eigenchannel basis may includes discrete and discretized continuum (real or complex energy) single particle states. The coupled-channel solutions are computed through diagonalization in these bases. The method is applied to a few two-channel problems. The exact bound spectrum of the Poeschl-Teller potential is well described by a basis of real energy continuum states. For the deuteron with the Reid potential the experimental energy and the $S$ and $D$ wave functions content are reproduced in the asymptotic limit of the energy cutoff. For the Noro-Taylor potential, beside the exact bound state energies the resonant state energy is also well reproduced by using the complex energy Berggren basis. It is found that the expansion of the coupled-channel wave functions in these eigenchannel bases require less computational effort than the use of any other basis. The solutions are stable and converge as the energy cutoff increases.

R. M. Id Betan

2013-11-18T23:59:59.000Z

280

On the heat channel and its capacity  

E-Print Network (OSTI)

The heat channel is defined by an analog filter and a subsequent inaccurate measurement of the filter output signal. The filter is related to the solution of the heat equation and to the heat kernel of the quantum mechanical harmonic oscillator, so the name of the channel. The channel is modeled as an infinite-dimensional vector Gaussian channel and the capacity in terms of average energy of the input signal is derived. The relation to rate distortion theory is investigated by calculating the rate distortion function of a closely connected Gaussian process. An application to optical fiber communication is given. Characterizations of the capacity/rate distortion function by water-filling/reverse water-filling in the time-frequency plane are stated and proved. Finally, a second formula for the capacity of the heat channel based on average energy of the measured filter output signal is derived. The result is interpreted in context of estimation theory and a parallel to a famous formula connecting mutual informat...

Hammerich, Edwin

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "two-photon channel shows" 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

Charge recombination in the muon collider cooling channel  

SciTech Connect

The final stage of the ionization cooling channel for the muon collider must transversely recombine the positively and negatively charged bunches into a single beam before the muons can be accelerated. It is particularly important to minimize any emittance growth in this system since no further cooling takes place before the bunches are collided. We have found that emittance growth could be minimized by using symmetric pairs of bent solenoids and careful matching. We show that a practical design can be found that has transmission {approx}99%, emittance growth less than 0.1%, and minimal dispersion in the recombined bunches.

Fernow, R. C.; Palmer, R. B. [Physics Department, Brookhaven National Laboratory, Upton, NY 11973 (United States)

2012-12-21T23:59:59.000Z

282

Quatum Thermodynamics and the coherence in Ion channels  

E-Print Network (OSTI)

We showed that quantum mechanical superposition can sustain in the process of ion transfer in protein membrane for a substantial period, in spite of the presence of the interactions with environmental modes of molecular vibration. The spectral temperature, as defined in quantum thermodynamical framework plays a significant role in maintaining the coherence. The ratio of decoherence time and dwell time has been calculated, which can be directly related to the degree of coherence. The results shead new light to build quantum information system of entangled ionic states in the voltage gated biological channels.

Samyadeb Bhattacharya; Sisir Roy

2013-03-08T23:59:59.000Z

283

Poly(ethylene glycol)-based open-channel blockers for the acetylcholine receptor : mechanistic and structure-function studies at the single-channel level  

E-Print Network (OSTI)

Ion channels are essential mediators in nervous signaling pathways. Because hyperactivation of ion channels can lead to pathological disorders such as congenital myasthenic syndromes and neurodegeneration, channel inhibitors ...

Lin, Wan-Chen, Ph. D. Massachusetts Institute of Technology

2009-01-01T23:59:59.000Z

284

Peter Agre and Aquaporin Water Channels  

Office of Scientific and Technical Information (OSTI)

Peter Agre and Aquaporin Water Channels Peter Agre and Aquaporin Water Channels Resources with Additional Information Peter Agre Courtesy of Johns Hopkins University 'Peter Agre, MD received the Nobel Prize in Chemistry in 2003 for his work with aquaporins, a family of water channel proteins found throughout nature and responsible for numerous physiological processes in humans.'1 'Dr. Agre received his BA in chemistry from Augsburg College in 1970, and his MD from Johns Hopkins in 1974. Following an Internal Medicine Residency at Case Western Reserve University Hospitals of Cleveland and a Hematology-Oncology Fellowship at the University of North Carolina at Chapel Hill, Dr. Agre returned to Johns Hopkins as a postdoctoral fellow in cell biology. Dr. Agre joined the faculty in 1984 and has spent most of his professional life at Hopkins' School of Medicine, leaving in 2005 to go to become Vice Chancellor for Science and Technology at Duke University Medical Center.'2

285

Plasma channel optical pumping device and method  

SciTech Connect

A device and method for optically pumping a gaseous laser using blackbody radiation produced by a plasma channel which is formed from an electrical discharge between two electrodes spaced at opposite longitudinal ends of the laser. A preionization device which can comprise a laser or electron beam accelerator produces a preionization beam which is sufficient to cause an electrical discharge between the electrodes to initiate the plasma channel along the preionization path. The optical pumping energy is supplied by a high voltage power supply rather than by the preionization beam. High output optical intensities are produced by the laser due to the high temperature blackbody radiation produced by the plasma channel, in the same manner as an exploding wire type laser. However, unlike the exploding wire type laser, the disclosed invention can be operated in a repetitive manner by utilizing a repetitive pulsed preionization device.

Judd, O' Dean P. (Los Alamos, NM)

1983-06-28T23:59:59.000Z

286

Truncated channel representations for coupled harmonic oscillators  

E-Print Network (OSTI)

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

Yingkai Ouyang; Wee Hao Ng

2013-01-19T23:59:59.000Z

287

Channel simulation with quantum side information  

E-Print Network (OSTI)

We study and solve the problem of classical channel simulation with quantum side information at the receiver. This is a generalization of both the classical reverse Shannon theorem, and the classical-quantum Slepian-Wolf problem. The optimal noiseless communication rate is found to be reduced from the mutual information between the channel input and output by the Holevo information between the channel output and the quantum side information. Our main theorem has two important corollaries. The first is a quantum generalization of the Wyner-Ziv problem: rate-distortion theory with quantum side information. The second is an alternative proof of the trade-off between classical communication and common randomness distilled from a quantum state. The fully quantum generalization of the problem considered is quantum state redistribution. Here the sender and receiver share a mixed quantum state and the sender wants to transfer part of her state to the receiver using entanglement and quantum communication. We present o...

Luo, Z; Devetak, Igor; Luo, Zhicheng

2006-01-01T23:59:59.000Z

288

History dependent dynamics in a generic model of ion channels - an analytic study  

E-Print Network (OSTI)

Recent experiments have demonstrated that the timescale of adaptation of single neurons and ion channel populations to stimuli slows down as the length of stimulation increases; in fact, no upper bound on temporal time-scales seems to exist in such systems. Furthermore, patch clamp experiments on single ion channels have hinted at the existence of large, mostly unobservable, inactivation state spaces within a single ion channel. This raises the question of the relation between this multitude of inactivation states and the observed behavior. In this work we propose a minimal model for ion channel dynamics which does not assume any specific structure of the inactivation state space. The model is simple enough to render an analytical study possible. This leads to a clear and concise explanation of the experimentally observed exponential history-dependent relaxation in sodium channels in a voltage clamp setting, and shows that their recovery rate from slow inactivation must be voltage dependent. Furthermore, we predict that history-dependent relaxation cannot be created by overly sparse spiking activity. While the model was created with ion channel populations in mind, its simplicity and genericalness render it a good starting point for modeling similar effects in other systems, and for scaling up to higher levels such as single neurons which are also known to exhibit multiple time scales.

Daniel Soudry; Ron Meir

2009-12-20T23:59:59.000Z

289

Aspect ratio effect on heat transfer in rotating two-pass rectangular channels with smooth walls and ribbed walls  

E-Print Network (OSTI)

This study experimentally investigates the effects of rotation, the buoyancy force, and the channel aspect ratio on heat transfer in two-pass rotating rectangular channels. The experiments are conducted with two surface conditions: smooth walls and 45?? angled ribbed walls. The channel aspect ratios include 4:1, 2:1, 1:1, 1:2 and 1:4. Four Reynolds numbers are studied: 5000, 10000, 25000 and 40000. The rotation speed is fixed at 550 rpm for all tests, and for each channel, two channel orientations are studied: 90?? and 45?? or 135??, with respect to the plane of rotation. Rib turbulators are placed on the leading and trailing walls of the channels at an angle of 45?? to the flow direction. The ribs have a 1.59 by 1.59 mm square cross section, and the rib pitch-to-height ratio (P/e) is 10 for all tests. The effects of the local buoyancy parameter and channel aspect ratio on the regional Nusselt number ratio are presented. Pressure drop data are also measured for both smooth and ribbed channels in rotating and non-rotating conditions. The results show that increasing the local buoyancy parameter increases the Nusselt number ratio on the trailing surface and decreases the Nusselt number ratio on the leading surface in the first pass for all channels. However, the trend of the Nusselt number ratio in the second pass is more complicated due to the strong effect of the 180?? turn. Results are also presented for this critical turn region of the two-pass channels. In addition to these regions, the channel averaged heat transfer, friction factor, and thermal performance are determined for each channel. With the channels having comparable Nusselt number ratios, the 1:4 channel has the superior thermal performance because it incurs the least pressure penalty. In this study, the author is able to systematically analyze, correlate, and conclude the thermal performance comparison with the combination of rotation effects on five different aspect ratio channels with both smooth walls and rib turbulated walls.

Fu, Wen-Lung

2005-05-01T23:59:59.000Z

290

Transformer Recharging with Alpha Channeling in Tokamaks  

SciTech Connect

Transformer recharging with lower hybrid waves in tokamaks can give low average auxiliary power if the resistivity is kept high enough during the radio frequency (rf) recharging stage. At the same time, operation in the hot ion mode via alpha channeling increases the effective fusion reactivity. This paper will address the extent to which these two large cost saving steps are compatible. __________________________________________________

N.J. Fisch

2009-12-21T23:59:59.000Z

291

Fermi Liquid Instabilities in the Spin Channel  

SciTech Connect

We study the Fermi surface instabilities of the Pomeranchuk type in the spin triplet channel with high orbital partial waves (F{sub l}{sup a} (l > 0)). The ordered phases are classified into two classes, dubbed the {alpha} and {beta}-phases by analogy to the superfluid {sup 3}He-A and B-phases. The Fermi surfaces in the {alpha}-phases exhibit spontaneous anisotropic distortions, while those in the {beta}-phases remain circular or spherical with topologically non-trivial spin configurations in momentum space. In the {alpha}-phase, the Goldstone modes in the density channel exhibit anisotropic overdamping. The Goldstone modes in the spin channel have nearly isotropic underdamped dispersion relation at small propagating wavevectors. Due to the coupling to the Goldstone modes, the spin wave spectrum develops resonance peaks in both the {alpha} and {beta}-phases, which can be detected in inelastic neutron scattering experiments. In the p-wave channel {beta}-phase, a chiral ground state inhomogeneity is spontaneously generated due to a Lifshitz-like instability in the originally nonchiral systems. Possible experiments to detect these phases are discussed.

Wu, Congjun; /Santa Barbara, KITP; Sun, Kai; Fradkin, Eduardo; /Illinois U., Urbana; Zhang, Shou-Cheng; /Stanford U., Phys. Dept.

2010-03-16T23:59:59.000Z

292

Energy growth in the compliant channel  

E-Print Network (OSTI)

Energy growth in the compliant channel Jérôme Hoepffner Julien Favier, Alessandro Bottaro #12 stiffness K Forcing by the pressure #12;Energy Flow energy+wall kinetic and potential energy: Energy: 2) Optimality: #12;"=0, stable #12;Optimization results Growth enveloppe Energy evolution

Hoepffner, Jérôme

293

Turbulence Characteristics in a Tidal Channel  

Science Conference Proceedings (OSTI)

A broadband ADCP and a moored microstructure instrument (TAMI) were deployed in a tidal channel of 30-m depth and with peak speeds of 1 m s?1. The measurements enable us to derive profiles of stress, turbulent kinetic energy (TKE), the rate of ...

Youyu Lu; Rolf G. Lueck; Daiyan Huang

2000-05-01T23:59:59.000Z

294

Sabine-Neches Waterway Channel Improvement Project  

E-Print Network (OSTI)

vessels, the amount of vessel traffic on the SNWW has also increased. Both the SNWW and U.S. crude oil of navigation on the waterway. The current channel was completed in 1960. At that time, crude oil tankers are now used routinely for crude oil imports to both Beaumont and Port Arthur. In addition to larger

US Army Corps of Engineers

295

Superconducting solenoids for the MICE channel  

DOE Green Energy (OSTI)

This report describes the channel of superconductingsolenoids for the proposed international Muon Ionization CoolingExperiment (MICE). MICE consists of two cells of a SFOFO cooling channelthat is similar to that studied in the level 2 study of a neutrinofactory[1]. MICE also consists of two detector solenoids at either end ofthe cooling channel section. The superconducting solenoids for MICEperform three functions. The coupling solenoids, which are largesolenoids around 201.25 MHz RF cavities, couple the muon beam between thefocusing sections as it passes along the cooling channel. The focusingsolenoids are around the liquid hydrogen absorber that reduces themomentum of the muons in all directions. These solenoids generate agradient field along the axis as they reduce the beta of the muon beambefore it enters the absorber. Each detector solenoid system consists offive coils that match the muon beam coming to or from an absorber to a4.0 T uniform solenoidal field section that that contains the particledetectors at the ends of the experiment. There are detector solenoids atthe beginning and at the end of the experiment. This report describes theparameters of the eighteen superconducting coils that make up the MICEmagnetic channel.

Green, M.A.; Barr, G.; Baynham, D.E.; Rockford, J.H.; Fabbricatore, P.; Farinin, S.; Palmer, R.B.; Rey, J.M.

2003-05-01T23:59:59.000Z

296

Side-Channel leakage across borders  

Science Conference Proceedings (OSTI)

More and more embedded devices store sensitive information that is protected by means of cryptography. The confidentiality of this data is threatened by information leakage via side channels like the power consumption or the electromagnetic radiation. ... Keywords: I/O pin, microcontroller, optocoupler, power analysis, serial interface

Jörn-Marc Schmidt; Thomas Plos; Mario Kirschbaum; Michael Hutter; Marcel Medwed; Christoph Herbst

2010-04-01T23:59:59.000Z

297

Fuel cell collector plates with improved mass transfer channels  

DOE Patents (OSTI)

A fuel cell collector plate can be provided with one or more various channel constructions for the transport of reactants to the gas diffusion layer and the removal of water therefrom. The outlet channel can be arranged to have a reduced volume compared to the inlet channel, in both interdigitated and discontinuous spiral applications. The land width between an inlet channel and outlet channel can be reduced to improved mass flow rate in regions of deleted reactant concentrations. Additionally or alternatively, the depth of the inlet channel can be reduced in the direction of flow to reduce the diffusion path as the concentration of reactant is reduced.

Gurau, Vladimir (Miami, FL); Barbir, Frano (Palm Beach Gardens, FL); Neutzler, Jay K. (Palm Beach Gardens, FL)

2003-04-22T23:59:59.000Z

298

Applications and misapplications of the channel-capture formalism of direct neutron capture  

Science Conference Proceedings (OSTI)

We discuss the channel-capture approximation of slow neutron direct-capture theory. We show that this approximation gives a generally good representation of the neutron capture cross sections for several electric dipole transitions in a broad range of nuclides from A = 9 to A = 136; these are mostly near-spherical nuclei. Despite this body of agreement, we examine the accuracy we can expect from the simple channel-capture theory. Comparison with calculations of the potential-capture cross section from physically more realistic optical model calculations show that, in general, the channel-capture cross section can be up to approx. =40% in error. In cases where the expected channel-capture cross section is much smaller than the ''hard-sphere'' capture cross-section estimate, the disagreement with potential capture can be much worse than this. Also, in these cases, compound-nucleus capture can be of comparable or greater magnitude. These effects have been shown to completely undermine recent attempts to determine nuclear interaction radii for targets, such as /sup 12/C and /sup 9/Be, by application of the channel-capture formula to capture cross-section data. 20 refs.

Raman, S.; Lynn, J.E.

1985-01-01T23:59:59.000Z

299

The Effect of Channel Length on the Residual Circulation in Tidally Dominated Channels  

Science Conference Proceedings (OSTI)

With an analytic model, this paper describes the subtidal circulation in tidally dominated channels of different lengths, with arbitrary lateral depth variations. The focus is on an important parameter associated with the reversal of the exchange ...

Chunyan Li; James O’Donnell

2005-10-01T23:59:59.000Z

300

On adaptive transmission, signal detection and channel estimation for multiple antenna systems  

E-Print Network (OSTI)

This research concerns analysis of system capacity, development of adaptive transmission schemes with known channel state information at the transmitter (CSIT) and design of new signal detection and channel estimation schemes with low complexity in some multiple antenna systems. We first analyze the sum-rate capacity of the downlink of a cellular system with multiple transmit antennas and multiple receive antennas assuming perfect CSIT. We evaluate the ergodic sum-rate capacity and show how the sum-rate capacity increases as the number of users and the number of receive antennas increases. We develop upper and lower bounds on the sum-rate capacity and study various adaptive MIMO schemes to achieve, or approach, the sum-rate capacity. Next, we study the minimum outage probability transmission schemes in a multiple-input-single-output (MISO) flat fading channel assuming partial CSIT. Considering two special cases: the mean feedback and the covariance feedback, we derive the optimum spatial transmission directions and show that the associated optimum power allocation scheme, which minimizes the outage probability, is closely related to the target rate and the accuracy of the CSIT. Since CSIT is obtained at the cost of feedback bandwidth, we also consider optimal allocation of bandwidth between the data channel and the feedback channel in order to maximize the average throughput of the data channel in MISO, flat fading, frequency division duplex (FDD) systems. We show that beamforming based on feedback CSI can achieve an average rate larger than the capacity without CSIT under a wide range of mobility conditions. We next study a SAGE-aided List-BLAST detection scheme for MIMO systems which can achieve performance close to that of the maximum-likelihood detector with low complexity. Finally, we apply the EM and SAGE algorithms in channel estimation for OFDM systems with multiple transmit antennas and compare them with a recently proposed least-squares based estimation algorithm. The EM and SAGE algorithms partition the problem of estimating a multi-input channel into independent channel estimation for each transmit-receive antenna pair, therefore avoiding the matrix inversion encountered in the joint least-squares estimation.

Xie, Yongzhe

2004-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "two-photon channel shows" 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

Network-based consensus averaging with general noisy channels  

E-Print Network (OSTI)

This paper focuses on the consensus averaging problem on graphs under general noisy channels. We study a particular class of distributed consensus algorithms based on damped updates, and using the ordinary differential equation method, we prove that the updates converge almost surely to exact consensus for finite variance noise. Our analysis applies to various types of stochastic disturbances, including errors in parameters, transmission noise, and quantization noise. Under a suitable stability condition, we prove that the error is asymptotically Gaussian, and we show how the asymptotic covariance is specified by the graph Laplacian. For additive parameter noise, we show how the scaling of the asymptotic MSE is controlled by the spectral gap of the Laplacian.

Rajagopal, Ram

2008-01-01T23:59:59.000Z

302

Improvement of the Post-Blowdown Fuel Channel Analysis Model of Candu for a 35% RIH Break LOCA Without ECC  

SciTech Connect

A CATHENA model for a post-blowdown fuel channel analysis has been improved from an existing one for a Candu-6 reactor, and the analysis for a RIH 35% LBLOCA/LOECC has been performed. The results for the blowdown and post blowdown analyses show that the post blowdown model and its connection with the blowdown analysis model is successfully implemented. Also the 3-D CFD model for the fluid flow and heat transfer in the Candu fuel channel, is being developed for the post blowdown fuel channel heatup experiment CS28-1 using CFX 5.6 and its recent progress is described. (authors)

Rhee, B. W.; Kang, H.S.; Min, B.J. [Korea Atomic Energy Research Institute, P.O. Box 105, Yuseong, Daejeon, 305-600 (Korea, Republic of)

2004-07-01T23:59:59.000Z

303

Bits About the Channel: Multi-round Protocols for Two-way Fading Channels  

E-Print Network (OSTI)

Most communication systems use some form of feedback, often related to channel state information. In this paper, we study diversity multiplexing tradeoff for both FDD and TDD systems, when both receiver and transmitter knowledge about the channel is noisy and potentially mismatched. For FDD systems, we first extend the achievable tradeoff region for 1.5 rounds of message passing to get higher diversity compared to the best known scheme, in the regime of higher multiplexing gains. We then break the mold of all current channel state based protocols by using multiple rounds of conferencing to extract more bits about the actual channel. This iterative refinement of the channel increases the diversity order with every round of communication. The protocols are on-demand in nature, using high powers for training and feedback only when the channel is in poor states. The key result is that the diversity multiplexing tradeoff with perfect training and K levels of perfect feedback can be achieved, even when there are er...

Aggarwal, Vaneet

2009-01-01T23:59:59.000Z

304

Roderick MacKinnon and Ion Channels - Potassium Channels and Sodium  

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

Roderick MacKinnon and Ion Channels Roderick MacKinnon and Ion Channels Resources with Additional Information · Patents Roderick MacKinnon Courtesy of The Rockefeller University Roderick MacKinnon, M.D., a visiting researcher at the U.S. Department of Energy's Brookhaven National Laboratory, is a recipient of the 2003 Nobel Prize in Chemistry 'for structural and mechanistic studies of ion channels.' His research explains "how a class of proteins helps to generate nerve impulses - the electrical activity that underlies all movement, sensation, and perhaps even thought. The work leading to the prize was done primarily at the Cornell High Energy Synchrotron Source [CHESS] and the National Synchrotron Light Source [NSLS] at Brookhaven. The proteins, called ion channels, are tiny pores that stud the surface of all of our cells. These channels allow the passage of potassium, calcium, sodium, and chloride molecules called ions. Rapid-fire opening and closing of these channels releases ions, moving electrical impulses from the brain in a wave to their destination in the body."1

305

Jet substructure as a new Higgs search channel at the Large Hadron Collider  

E-Print Network (OSTI)

We show that W H and Z H production where the Higgs boson decays to bbbar can be recovered as good search channels for the Standard Model Higgs at the Large Hadron Collider. This is done by requiring the Higgs to have high transverse momentum, and employing state-of-the-art jet reconstruction and decomposition techniques.

Jonathan M. Butterworth; Adam R. Davison; Mathieu Rubin; Gavin P. Salam

2008-10-02T23:59:59.000Z

306

V-128: Xen Event Channel Tracking Pointer Bug Local Privilege...  

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

8: Xen Event Channel Tracking Pointer Bug Local Privilege Escalation V-128: Xen Event Channel Tracking Pointer Bug Local Privilege Escalation April 8, 2013 - 12:28am Addthis...

307

Frictionally Modified Rotating Hydraulic Channel Exchange and Ocean Outflows  

Science Conference Proceedings (OSTI)

Laboratory experiments of two-layer exchange through channels of circular and half-circular cross section are described. Simple theoretical limits on exchange for the circular channels are obtained from models involving either friction or ...

Gregory C. Johnson; Daniel R. Ohlsen

1994-01-01T23:59:59.000Z

308

Transmission Policies for Asymmetric Interference Channels with Energy Harvesting Nodes  

E-Print Network (OSTI)

Transmission Policies for Asymmetric Interference Channels with Energy Harvesting Nodes Kaya power policies to maximize sum capacity in an energy harvesting setting. It is shown derive optimal power allocation policies for interference channels comprised of energy harvesting

Yener, Aylin

309

Defending against side-channel attacks : DynamoREA  

E-Print Network (OSTI)

Modern computer architectures are prone to leak information about their applications through side-channels caused by micro-architectural side-effects. Through these side-channels, attackers can launch timing attacks by ...

Wen, David, M. Eng. (David Y.). Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

310

Molecular Mechanisms of a Retinal Cyclic Nucleotide-Gated Channel.  

E-Print Network (OSTI)

??Cyclic nucleotide-gated (CNG) channels mediate the transduction of light signals to electrical signals in vertebrate photoreceptors. These channels are non-selective for cations and open upon… (more)

Martinez-Francois, Juan R

2009-01-01T23:59:59.000Z

311

Analysis of global channel costs for the pharmaceutical industry  

E-Print Network (OSTI)

The pharmaceutical industry creates products which often have more than one supply chain channel, defined as a route through the supply chain network from sourcing to the end market. Each channel's specific cost characteristics ...

Rimling, Eric C. (Eric Christopher)

2009-01-01T23:59:59.000Z

312

Evaluating demand planning strategy in the retail channel  

E-Print Network (OSTI)

In 2007 Dell began selling through the retail channel. Five years later, the retail channel is still in the early stages relative to competitors and is growing rapidly. Short product lifecycles, long lead times and a high ...

Zehavi, Limor (Limor Hadas)

2012-01-01T23:59:59.000Z

313

Diamond Channel with Partially Separated Relays Ravi Tandon Sennur Ulukus  

E-Print Network (OSTI)

Diamond Channel with Partially Separated Relays Ravi Tandon Sennur Ulukus Department of Electrical Theory, 27(1):122­125, January 1981. [8] R. Tandon and S. Ulukus. Diamond channels with partially

Ulukus, Sennur

314

Six-channel adaptive fibre-optic interferometer  

SciTech Connect

We have proposed and analysed a scheme for the multiplexing of orthogonal dynamic holograms in photorefractive crystals which ensures almost zero cross talk between the holographic channels upon phase demodulation. A six-channel adaptive fibre-optic interferometer was built, and the detection limit for small phase fluctuations in the channels of the interferometer was determined to be 2.1 Multiplication-Sign 10{sup -8} rad W{sup 1/2} Hz{sup -1/2}. The channel multiplexing capacity of the interferometer was estimated. The formation of 70 channels such that their optical fields completely overlap in the crystal reduces the relative detection limit in the working channel by just 10 %. We found conditions under which the maximum cross talk between the channels was within the intrinsic noise level in the channels (-47 dB).

Romashko, R V; Bezruk, M N; Kamshilin, A A; Kulchin, Yurii N

2012-06-30T23:59:59.000Z

315

Zero-error capacity of a quantum channel  

E-Print Network (OSTI)

We define the quantum zero-error capacity, a new kind of classical capacity of a noisy quantum channel. Moreover, the necessary requirement for which a quantum channel has zero-error capacity greater than zero is also given.

Rex A. C. Medeiros; Francisco M. de Assis

2004-03-26T23:59:59.000Z

316

A better understanding of a Uinta Basin channelized analog reservoir through geostatistics and reservoir simulation  

E-Print Network (OSTI)

The Green River Formation is located in the Uinta basin of northeastern Utah. It contains several reservoirs that can be classified as lacustrine such as the Altamont-Bluebell and Red Wash. Lacustrine reservoirs are abundant in other provinces in the world such as China, Southeast Asia, Brazil, West Africa, and the Caspian Sea. Even though they can contain important accumulations of hydrocarbons, our understanding of the primary controls on fluid flow within these systems is still not clear. This ambiguity leads in some cases to inefficient recovery of hydrocarbons in such reservoirs. This study is aimed at clarifying the effects of heterogeneities in channelized reservoirs on fluid flow. It uses a multidisciplinary approach combining geologic knowledge with reservoir engineering. It involves the geologic modeling and fluid flow simulation of a channelized outcrop of the Green River formation. The study of this outcrop provides insights for modeling, understanding, and possibly predicting the behavior of channelized oil and gas reservoirs. Results show that the number of channels in the model can have a significant effect on performance. The rock properties in these channels and the channel paths are also important factors that determine the recovery efficiency. Other findings include the effect on performance of vertical anisotropy in a channelized reservoir. We discovered that an isotropic reservoir performs better than an anisotropic one and that the well perforation interval is extremely important when comparing the performance of several anisotropic cases. Finally, we investigated the effects of the recovery strategy on performance in a channelized setting. We found that waterflooding yields better results than any of the other recovery techniques analyzed. Sensitivity runs with different waterflood patterns indicated that a staggered line drive results in the best performance in the analog channelized reservoir we modeled, as it allows for the best recovery factor in the least amount of time. The results of this work can be used qualitatively to predict performance in a channelized setting but their use is limited quantitatively because of the issue of scale, i.e. the outcrop width is much less than typical interwell scale.

Robbana, Enis

2002-01-01T23:59:59.000Z

317

Accurate Alignment of Plasma Channels Based on Laser Centroid Oscillations  

Science Conference Proceedings (OSTI)

A technique has been developed to accurately align a laser beam through a plasma channel by minimizing the shift in laser centroid and angle at the channel outptut. If only the shift in centroid or angle is measured, then accurate alignment is provided by minimizing laser centroid motion at the channel exit as the channel properties are scanned. The improvement in alignment accuracy provided by this technique is important for minimizing electron beam pointing errors in laser plasma accelerators.

Gonsalves, Anthony; Nakamura, Kei; Lin, Chen; Osterhoff, Jens; Shiraishi, Satomi; Schroeder, Carl; Geddes, Cameron; Toth, Csaba; Esarey, Eric; Leemans, Wim

2011-03-23T23:59:59.000Z

318

BWR Channel Bow Model: Technical Bases, Description, and Qualification  

Science Conference Proceedings (OSTI)

A model has been developed for the prediction of Zircaloy-2 (Zr-2) channel bow, including fast fluence gradient-induced channel bow and control blade shadow corrosion-induced channel bow. This report provides: (1) a description of the channel bow model in its present form, (2) the technical bases for the model formulations, (3) detailed qualification of the model prediction capability by comparison of predictions to the available performance characterization measurements, and ...

2013-05-20T23:59:59.000Z

319

The effect of a magnetic field on heat transfer in a slotted channel  

SciTech Connect

The results of numerical and experimental studies of liquid metal heat transfer in slotted channels in a transverse magnetic field are presented. Test results showed an improvement in heat transfer in a straight channel at low and moderate interaction parameter, N. The Nusselt number at small N (around 120) was up to 2 times higher than in turbulent flow without a magnetic field, Peclet number being equal. This effect of heat transfer enhancement is caused by the generation and development of large scale velocity fluctuations in the near heated wall area. Qualitative and quantitative correlations between heat transfer and velocity fluctuation characteristics are presented.

Evtushenko, I.A.; Kirillov, I.R.; Sidorenkov, S.S. [D.V. Efremov Scientific Research Institute of Electrophysical Apparatus, St. Petersburg (Russian Federation); Hua, T.Q.; Reed, C.B. [Argonne National Lab., IL (United States)

1994-07-01T23:59:59.000Z

320

Support vector machine in novelty detection for multi-channel combustion data  

E-Print Network (OSTI)

Abstract. Multi-channel combustion data, consisting of gas pressure and two combustion chamber luminosity measurements, are investigated in the prediction of combustion instability. Wavelet analysis is used for feature extraction. A SVM approach is applied for novelty detection and the construction of a model of normal system operation. Novelty scores generated by classifiers from different channels are combined to give a final decision of data novelty. Comparisons between the proposed SVM method and a GMM approach show that earlier identification of combustion instability, and greater distinction between stable and unstable data classes, are achieved with the proposed SVM approach. 1

Lei A. Clifton; Hujun Yin; Yang Zhang

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "two-photon channel shows" 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

Quantum superadditivity in linear optics networks: Sending bits via multiple-access Gaussian channels  

Science Conference Proceedings (OSTI)

Superadditivity effects of communication capacities are known in the case of discrete variable quantum channels. We describe the continuous variable analog of one of these effects in the framework of Gaussian multiple access channels (MACs). Classically, superadditivity-type effects are strongly restricted: For example, adding resources to one sender is never advantageous to other senders in sending their respective information to the receiver. We show that this rule can be surpassed using quantum resources, giving rise to a type of truly quantum superadditivity. This is illustrated here for two examples of experimentally feasible Gaussian MACs.

Czekaj, L.; Horodecki, P. [Faculty of Applied Physics and Mathematics, Gdansk University of Technology, PL-80-952 Gdansk (Poland); National Quantum Information Center of Gdansk, PL-81-824 Sopot (Poland); Korbicz, J. K. [Faculty of Applied Physics and Mathematics, Gdansk University of Technology, PL-80-952 Gdansk (Poland); National Quantum Information Center of Gdansk, PL-81-824 Sopot (Poland); Institute of Theoretical Physics and Astrophysics, University of Gdansk, PL-80-952 Gdansk (Poland); Chhajlany, R. W. [Faculty of Applied Physics and Mathematics, Gdansk University of Technology, PL-80-952 Gdansk (Poland); National Quantum Information Center of Gdansk, PL-81-824 Sopot (Poland); Faculty of Physics, Adam Mickiewicz University, Umultowska 85, PL-61-614 Poznan (Poland)

2010-08-15T23:59:59.000Z

322

Tight bound on coherent-state-based entanglement generation over lossy channels  

Science Conference Proceedings (OSTI)

The first stage of the hybrid quantum repeaters is entanglement generation based on transmission of pulses in coherent states over a lossy channel. Protocols to make entanglement with only one type of error are favorable for rendering subsequent entanglement distillation efficient. Here we provide the tight upper bound on performances of these protocols that is determined only by the channel loss. In addition, we show that this bound is achievable by utilizing a proposed protocol [K. Azuma, N. Sota, R. Namiki, S. K. Oezdemir, T. Yamamoto, M. Koashi, and N. Imoto, Phys. Rev. A 80, 060303(R) (2009)] composed of a simple combination of linear optical elements and photon-number-resolving detectors.

Azuma, Koji; Sota, Naoya; Koashi, Masato; Imoto, Nobuyuki [Division of Materials Physics, Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531 (Japan)

2010-02-15T23:59:59.000Z

323

Throughput and Channel Access Statistics of Generalized Selection Multiuser Scheduling  

Science Conference Proceedings (OSTI)

To provide a near-optimal low-complexity solution to parallel multiuser scheduling in code-division multiple-access (CDMA), we propose generalized selection multiuser diversity (GSMuD) schemes with multi-code channel assignment and analyze their performance. ... Keywords: Multiuser diversity, channel access statistics, fairness, generalized fading channels, multicode CDMA, throughput

Yao Ma; Jinghua Jin; Dongbo Zhang

2008-08-01T23:59:59.000Z

324

Microwave Radiometer – 3 Channel (MWR3C) Handbook  

SciTech Connect

The microwave radiometer 3-channel (MWR3C) provides time-series measurements of brightness temperatures from three channels centered at 23.834, 30, and 89 GHz. These three channels are sensitive to the presence of liquid water and precipitable water vapor.

Cadeddu, MP

2012-05-04T23:59:59.000Z

325

Instantaneous Capacity of OFDM on Rayleigh-Fading Channels  

Science Conference Proceedings (OSTI)

For a power limited orthogonal frequency-division multiplexing (OFDM) system transmitting a large number N of subcarriers over a Rayleigh-fading channel, the distribution of the instantaneous capacity is shown to be approximately Gaussian. The mean and ... Keywords: Channel capacity, Rayleigh-fading channels, orthogonal frequency-division multiplexing (OFDM)

A. Clark; P. J. Smith; D. P. Taylor

2007-01-01T23:59:59.000Z

326

Linear signal-compensated amplifier for reactor power measuring channels  

Science Conference Proceedings (OSTI)

A linear amplifier with automatic signal compensation has been developed for nuclear channels. The amplifiercontrols its sensitivity automatically according to the reference input within the desired settings and has automatic signal compensation capability for use in the nuclear channels. The amplifier will be used in the existing safety channel of Pakistan Research Reactor-1

M. Tahir Khaleeq; Atique-ur-Rahman; Eijaz Ahmed

2006-01-01T23:59:59.000Z

327

Charm mass effects in bulk channel correlations  

E-Print Network (OSTI)

The bulk viscosity of thermalized QCD matter at temperatures above a few hundred MeV could be significantly influenced by charm quarks because their contribution arises four perturbative orders before purely gluonic effects. In an attempt to clarify the challenges of a lattice study, we determine the relevant imaginary-time correlator (of massive scalar densities) up to NLO in perturbation theory, and compare with existing data. We find discrepancies much larger than in the vector channel; this may hint, apart from the importance of taking a continuum limit, to larger non-perturbative effects in the scalar channel. We also recall how a transport peak related to the scalar density spectral function encodes non-perturbative information concerning the charm quark chemical equilibration rate close to equilibrium.

Y. Burnier; M. Laine

2013-09-06T23:59:59.000Z

328

TRANSIENT HEAT TRANSFER IN REACTOR COOLANT CHANNELS  

SciTech Connect

An analysis is presented of the transient behavior of a generalized cooiant channel neglecting temperature dependent reactivity changes. The analysis is applicable to forced convection cooling of heterogeneous reactor fuel elements or electrically heated simulation thereof. Derivations are given for cases of variation of coolant inlet temperature and of heat generation. An approximation is also developed applicable to thin fuel elements. From this, solutions are obtained for cases-of impulsive, step, linear, and step-exponential variations of inlet temperature, and, of impulsive and uniform variations of heat generation. The solutions presented will be of use during preliminary stages of design of new heterogeneous reactor concepts (when the use of computing machines may not be warranted), and, in the design and interpretation of transient experiments simulating reactor fuel channels. (auth)

Stein, R.P.

1957-10-31T23:59:59.000Z

329

Fractional diffusion modeling of ion channel gating  

E-Print Network (OSTI)

An anomalous diffusion model for ion channel gating is put forward. This modeling scheme is able to describe the non-exponential, power-law like gating behavior of residence time intervals in several types of ion channels. Our scheme presents a generalization of the discrete diffusion model by Millhauser, Salpeter and Oswald [Proc. Natl. Acad. Sci. USA 85, 1503 (1988)] to the case of a continuous, anomalously slow conformational diffusion. The corresponding generalization is derived from a continuous time random walk composed of nearest neighbor jumps which in the scaling limit results in a fractional diffusion equation. The studied model contains three parameters only: the mean residence time, a characteristic time of conformational diffusion, and the index of subdiffusion. A tractable analytical expression for the characteristic function of the residence time distribution (RTD) is obtained. In the limiting case of normal diffusion a prior result of Goychuk and Hanggi [Proc. Natl. Acad. Sci. USA 99, 3552 (20...

Goychuk, I; Goychuk, Igor; Hanggi, Peter

2004-01-01T23:59:59.000Z

330

Renyi divergences and the classical capacity of finite compound channels  

E-Print Network (OSTI)

We show two-sided bounds between the conventional quantum R\\'enyi divergences and the new notion of R\\'enyi divergences introduced recently in M\\"uller-Lennert, Dupuis, Szehr, Fehr and Tomamichel, arXiv:1306.3142, and Wilde, Winter, Yang, arXiv:1306.1586. The bounds imply that the two versions can be used interchangeably near alpha=1, and hence one can benefit from the best properties of both when proving coding theorems in the case of asymptotically vanishing error. We illustrate this by giving a short and simple proof for the achievability of the capacity formula given by Datta and Dorlas for averaged channels with finitely many i.i.d. branches, which yields the same lower bound for the classical capacity of finite compound channels. The proof is based on very general arguments; the main ingredients are Hayashi and Nagaoka's single-shot random coding theorem, and a weak quasi-concavity property of the Renyi divergences that we also establish here. We also use our techniques to give a new proof for the direct rate of the hypothesis testing problem between a composite i.i.d. null hypothesis and a simple i.i.d. alternative hypothesis.

Milan Mosonyi

2013-10-28T23:59:59.000Z

331

Corrosion and arc erosion in MHD channels. Final report  

DOE Green Energy (OSTI)

The problems connected with gas side corrosion for the design of the lA4 (POC) channel hardware are explored and results of gas side wear rate tests in the Textron Mark VII facility are presented. It is shown that the proposed designs meet a 2000 hour lifetime criterion based upon these materials tests. Improvement in cathode lifetime is demonstrated with lower voltage intercathode gaps. The corrosion of these materials is discussed and it is shown how lifetimes are dependent upon gap voltage and average metal temperature. The importance of uniformity of slagging to the durability of the anode wall is demonstrated. The wear mechanism of the anodes in the MHD channel is analyzed. In addition to gas-side corrosion, the results of specific water corrosion tests of sidewall materials are discussed. All of the tests reported here were carried out to confirm the gas-side performance and the manufacturability of anode and sidewall designs and to address questions posed about the durability of tungsten-copper on the waterside. the results of water corrosion tests of the tungsten copper alloy sidewall material are presented to show that with proper control of waterside pH and, if necessary, dissolved oxygen, one can obtain reliable performance with no degradation of heat transfer with this material. The final choice of materials was determined primarily by the outcome of these tests and also by the question of the manufacturability of the prospective designs.

Rosa, R.J. [Montana State Univ., Bozeman, MT (United States). Dept. of Mechanical Engineering; Pollina, R.J. [Montana State Univ., Bozeman, MT (United States). Dept. of Mechanical Engineering]|[EG and G Energy Measurements, Inc., Las Vegas, NV (United States)

1992-08-01T23:59:59.000Z

332

Computational optimization of synthetic water channels.  

Science Conference Proceedings (OSTI)

Membranes for liquid and gas separations and ion transport are critical to water purification, osmotic energy generation, fuel cells, batteries, supercapacitors, and catalysis. Often these membranes lack pore uniformity and robustness under operating conditions, which can lead to a decrease in performance. The lack of uniformity means that many pores are non-functional. Traditional membranes overcome these limitations by using thick membrane materials that impede transport and selectivity, which results in decreased performance and increased operating costs. For example, limitations in membrane performance demand high applied pressures to deionize water using reverse osmosis. In contrast, cellular membranes combine high flux and selective transport using membrane-bound protein channels operating at small pressure differences. Pore size and chemistry in the cellular channels is defined uniformly and with sub-nanometer precision through protein folding. The thickness of these cellular membranes is limited to that of the cellular membrane bilayer, about 4 nm thick, which enhances transport. Pores in the cellular membranes are robust under operating conditions in the body. Recent efforts to mimic cellular water channels for efficient water deionization produced a significant advance in membrane function. The novel biomimetic design achieved a 10-fold increase in membrane permeability to water flow compared to commercial membranes and still maintained high salt rejection. Despite this success, there is a lack of understanding about why this membrane performs so well. To address this lack of knowledge, we used highperformance computing to interrogate the structural and chemical environments experienced by water and electrolytes in the newly created biomimetic membranes. We also compared the solvation environments between the biomimetic membrane and cellular water channels. These results will help inform future efforts to optimize and tune the performance of synthetic biomimetic membranes for applications in water purification, energy, and catalysis.

Rogers, David Michael; Rempe, Susan L. B.

2012-12-01T23:59:59.000Z

333

Channel simulation with quantum side information  

E-Print Network (OSTI)

We study and solve the problem of classical channel simulation with quantum side information at the receiver. This is a generalization of both the classical reverse Shannon theorem, and the classical-quantum Slepian-Wolf problem. The optimal noiseless communication rate is found to be reduced from the mutual information between the channel input and output by the Holevo information between the channel output and the quantum side information. Our main theorem has two important corollaries. The first is a quantum generalization of the Wyner-Ziv problem: rate-distortion theory with quantum side information. The second is an alternative proof of the trade-off between classical communication and common randomness distilled from a quantum state. The fully quantum generalization of the problem considered is quantum state redistribution. Here the sender and receiver share a mixed quantum state and the sender wants to transfer part of her state to the receiver using entanglement and quantum communication. We present outer and inner bounds on the achievable rate pairs.

Zhicheng Luo; Igor Devetak

2006-11-01T23:59:59.000Z

334

Entanglement can increase asymptotic rates of zero-error classical communication over classical channels  

E-Print Network (OSTI)

It is known that the number of different classical messages which can be communicated with a single use of a classical channel with zero probability of decoding error can sometimes be increased by using entanglement shared between sender and receiver. It has been an open question to determine whether entanglement can ever increase the zero-error communication rates achievable in the limit of many channel uses. In this paper we show, by explicit examples, that entanglement can indeed increase asymptotic zero-error capacity, even to the extent that it is equal to the normal capacity of the channel. Interestingly, our examples are based on the exceptional simple root systems E7 and E8.

Debbie Leung; Laura Mancinska; William Matthews; Maris Ozols; Aidan Roy

2010-09-07T23:59:59.000Z

335

A Dual Channel X-ray Spectrometer for Fast Ignition Research  

SciTech Connect

A new Dual Channel Highly Ordered Pyrolytic Graphite (DC-HOPG) x-ray spectrometer was developed to study laser-generated electron beam transport. The instrument uses a pair of graphite crystals and has the advantage of simultaneously detecting self emission from low-Z materials in first diffraction order and high-Z materials in second order. The emissions from the target are detected using a pair of parallel imaging plates positioned in a such way that the noise from background is minimized and the mosaic focusing is achieved. Initial tests of the diagnostic on Titan laser (I {approx} 10{sup 20} W/cm{sup 2}, {tau} = 0.7 ps) show excellent signal-to-noise ratio (SNR) > 1000 for the low energy channel and SNR > 400 for the high energy channel.

Akli, K U; Patel, P K; Van Maren, R; Stephens, R B; Key, M H; Higginson, D P; Westover, B; Chen, C D; Mackinnon, A J; Bartal, T; Beg, F N; Chawla, S; Fedosejevs, R; Freeman, R R; Hey, D S; Kemp, G E; LePape, S; Link, A; Ma, T; MacPhee, A G; McLean, H S; Ping, Y; Tsui, Y Y; Van Woerkom, L D; Wei, M S; Yabuuchi, T

2010-04-19T23:59:59.000Z

336

Exploiting Channel Correlation and PU Traffic Memory for Opportunistic Spectrum Scheduling  

E-Print Network (OSTI)

We consider a cognitive radio network with multiple primary users (PUs) and one secondary user (SU), where a spectrum server is utilized for spectrum sensing and scheduling the SU to transmit over one of the PU channels opportunistically. One practical yet challenging scenario is when \\textit{both} the PU occupancy and the channel fading vary over time and exhibit temporal correlations. Little work has been done for exploiting such temporal memory in the channel fading and the PU occupancy simultaneously for opportunistic spectrum scheduling. A main goal of this work is to understand the intricate tradeoffs resulting from the interactions of the two sets of system states - the channel fading and the PU occupancy, by casting the problem as a partially observable Markov decision process. We first show that a simple greedy policy is optimal in some special cases. To build a clear understanding of the tradeoffs, we then introduce a full-observation genie-aided system, where the spectrum server collects channel fa...

Wang, Shanshan; Zhang, Junshan

2012-01-01T23:59:59.000Z

337

Outage Performance of Dual-Hop AF Relay Channels with Co-Channel Interferences over Rayleigh Fading  

Science Conference Proceedings (OSTI)

This paper studies the outage performance of a dual-hop amplify-and-forward (AF) relay fading channel in an interference-limited environment. The relay and destination nodes are corrupted by multiple co-channel Rayleigh interferences. New exact closed-form ... Keywords: Amplify and-forward relay, Co-channel interference, Nonregenerative relay, Outage probability, Rayleigh fading

Aleksandra M. Cvetkovi?; Dejan N. Mili?; Aleksandar S. Cvetkovi?; Mihajlo Stefanovi?

2013-06-01T23:59:59.000Z

338

Investigating the mechanotransduction by two-photon fluorescence microscopy measurement of intracellular free energy of binding  

E-Print Network (OSTI)

Force, due either to haemodynamic shear stress or relayed directly to the cell through adhesion complexes, is transmitted and translated into biological signals. This process is known as mechanotransduction. Extensive ...

Abdul Rahim, Nur Aida

2008-01-01T23:59:59.000Z

339

Watching Electrons Transfer from Metals to Insulators using Two Photon Photoemission  

E-Print Network (OSTI)

the simplest model, stochastic friction. Figure 3.6 Angleto stochastic fluctuations in its environment, or friction.

Johns, James

2010-01-01T23:59:59.000Z

340

High-statistics study of K^0_S pair production in two-photon collisions  

E-Print Network (OSTI)

We report a high-statistics measurement of the differential cross section of the process gamma gamma --> K^0_S K^0_S in the range 1.05 GeV K^0_S K^0_S is reported. The detailed behavior of the cross section is updated and compared with QCD-based calculations.

The Belle Collaboration; S. Uehara; Y. Watanabe; H. Nakazawa; I. Adachi; H. Aihara; D. M. Asner; V. Aulchenko; T. Aushev; A. M. Bakich; A. Bala; V. Bhardwaj; B. Bhuyan; A. Bondar; G. Bonvicini; A. Bozek; M. Bra?ko; V. Chekelian; A. Chen; P. Chen; B. G. Cheon; K. Chilikin; R. Chistov; K. Cho; V. Chobanova; S. -K. Choi; Y. Choi; D. Cinabro; J. Dalseno; J. Dingfelder; Z. Doležal; D. Dutta; S. Eidelman; D. Epifanov; H. Farhat; J. E. Fast; M. Feindt; T. Ferber; A. Frey; V. Gaur; N. Gabyshev; S. Ganguly; R. Gillard; F. Giordano; Y. M. Goh; B. Golob; J. Haba; K. Hayasaka; H. Hayashii; Y. Hoshi; W. -S. Hou; H. J. Hyun; T. Iijima; A. Ishikawa; R. Itoh; Y. Iwasaki; T. Julius; D. H. Kah; J. H. Kang; E. Kato; H. Kawai; T. Kawasaki; C. Kiesling; D. Y. Kim; H. O. Kim; J. B. Kim; J. H. Kim; Y. J. Kim; J. Klucar; B. R. Ko; P. Kodyš; S. Korpar; P. Križan; P. Krokovny; T. Kumita; A. Kuzmin; Y. -J. Kwon; S. -H. Lee; J. Li; Y. Li; C. Liu; Z. Q. Liu; D. Liventsev; P. Lukin; D. Matvienko; K. Miyabayashi; H. Miyata; R. Mizuk; A. Moll; T. Mori; N. Muramatsu; R. Mussa; Y. Nagasaka; M. Nakao; C. Ng; N. K. Nisar; S. Nishida; O. Nitoh; S. Ogawa; S. Okuno; G. Pakhlova; C. W. Park; H. Park; H. K. Park; T. K. Pedlar; R. Pestotnik; M. Petri?; L. E. Piilonen; M. Ritter; M. Röhrken; A. Rostomyan; H. Sahoo; T. Saito; Y. Sakai; S. Sandilya; L. Santelj; T. Sanuki; V. Savinov; O. Schneider; G. Schnell; C. Schwanda; R. Seidl; K. Senyo; O. Seon; M. Shapkin; C. P. Shen; T. -A. Shibata; J. -G. Shiu; B. Shwartz; A. Sibidanov; F. Simon; Y. -S. Sohn; A. Sokolov; E. Solovieva; M. Stari?; M. Steder; M. Sumihama; T. Sumiyoshi; U. Tamponi; K. Tanida; G. Tatishvili; Y. Teramoto; M. Uchida; T. Uglov; Y. Unno; S. Uno; P. Urquijo; S. E. Vahsen; C. Van Hulse; G. Varner; M. N. Wagner; C. H. Wang; M. -Z. Wang; P. Wang; X. L. Wang; K. M. Williams; E. Won; Y. Yamashita; S. Yashchenko; Y. Yook; C. Z. Yuan; Y. Yusa; C. C. Zhang; Z. P. Zhang; V. Zhilich; V. Zhulanov; A. Zupanc

2013-07-29T23:59:59.000Z

Note: This page contains sample records for the topic "two-photon channel shows" from the National Library of EnergyBeta (NLEBeta).
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341

Two-photon-driven nonlinear dynamics and entanglement of an atom in a nonuniform cavity  

Science Conference Proceedings (OSTI)

In this paper we study the dynamics in the general case for a Tavis-Cummings atom in a nonuniform cavity. In addition to the dynamical Stark shift, the center-of-mass motion of the atom and the recoil effect are considered in both the weak and the strong cavity-atom coupling regimes. It is shown that the spatial motion of the atom inside the cavity in the resonant case leads to a transition between topologically different solutions. This effect is manifested by a singularity in the interlevel transition spectrum. In the nonresonant case, the spatial motion of the atom leads to a switching of the spin orientation. In both effects, the key factor is the relation between the values of the Stark shift and the cavity-field coupling constant. We also investigate the entanglement of an atom in the cavity with the radiation field. It is shown that the entanglement between the atom and the field, usually quantified in terms of purity, decreases with increasing Stark shift.

Chotorlishvili, L. [Institut fuer Physik, Martin-Luther Universitaet Halle-Wittenberg, Heinrich-Damerow-Strasse 4, D-06120 Halle (Germany); Institut fuer Theoretische Physik, Universitaet Heidelberg, Philosophenweg 19, D-69120 Heidelberg (Germany); Toklikishvili, Z. [Physics Department of the Tbilisi State University, Chavchavadze Avenue 3, 0128 Tbilisi (Georgia); Wimberger, S. [Institut fuer Theoretische Physik, Universitaet Heidelberg, Philosophenweg 19, D-69120 Heidelberg (Germany); Berakdar, J. [Institut fuer Physik, Martin-Luther Universitaet Halle-Wittenberg, Heinrich-Damerow-Strasse 4, D-06120 Halle (Germany)

2011-07-15T23:59:59.000Z

342

Two-photon decay of $?^0$ from two-flavor lattice QCD  

E-Print Network (OSTI)

We study the correction to the radiative $\\pi^0$ decay width due to finite light quark mass. Using lattice QCD with the overlap fermion formulation, we calculate the three-point function of the form $$ in the (Euclidean) momentum space, which corresponds to the $\\pi^0\\rightarrow \\gamma^*\\gamma^*$ amplitude. To fit the lattice data, we use two different modifications of vector meson dominance (VMD) ansatz. One is a combined form of VMD with the next-to-leading order (NLO) chiral perturbation theory (ChPT), and the other is a resummed form of pion-loop diagrams. We extract one of the low energy constants in NLO ChPT, and estimate $\\pi^0\\rightarrow \\gamma\\gamma$ decay width including finite mass correction.

E. Shintani; S. Aoki; S. Hashimoto; T. Onogi; N. Yamada

2011-02-27T23:59:59.000Z

343

Meson production in two-photon interactions at energies available at CERN Large Hadron Collider  

E-Print Network (OSTI)

The meson production cross sections are estimated considering photon-photon interactions in hadron - hadron collisions at CERN LHC energies. We consider a large number of mesons with photon-photon partial decay width well constrained by the experiment and some mesons which are currently considered as hadronic molecule and glueball candidates. Our results demonstrate that the experimental analysis of these states is feasible at CERN - LHC.

V. P. Goncalves; D. T. da Silva; W. K. Sauter

2012-09-04T23:59:59.000Z

344

Electron Dynamics and Symmetries at the Metal-Molecule Interface Probed by Two Photon Photoemission  

E-Print Network (OSTI)

c-60 organic photovoltaic cells. J.A.C.S. , 128:8108–8109, [electronic devices. In a photovoltaic cell, charge transfer

Muller, Eric Anton

2012-01-01T23:59:59.000Z

345

Non-linear QCD dynamics in two-photon interactions at high energies  

SciTech Connect

Assuming that the dipole - dipole cross section can be related with the dipole - proton cross section, we calculate the total {gamma}{gamma}, {gamma}*{gamma}* cross-sections and the real photon structure function F{sup {gamma}}{sub 2}(x,Q{sup 2}) using the recent solution of the BK equation with running coupling constant.

Carvalho, F. [Depto de Ciencias Exatas e da Terra, Universidade Federal de Sao Paulo Rua Arthur Riedel 275, Jd. Eldorado, Cep 09972-270, Diadema, SP (Brazil); Navarra, F. S.; Cazaroto, E. [Instituto de Fisica, Universidade de Sao Paulo, Rua do Matao, Travessa R, 187, 05508-090 Sao Paulo, SP (Brazil); Goncalves, V. P. [Instituto de Fisica e Matematica, Universidade Federal de Pelotas Caixa Postal 354, 96010-900, Pelotas, RS (Brazil)

2013-03-25T23:59:59.000Z

346

Ph.D. Research Project Search of the Higgs boson in the two photon final state  

E-Print Network (OSTI)

the `Higgs boson particle' (fondly known as `the Higgs'), for that, it is hoped, will explain why things have role in that it gives mass to every elementary particle, including the Higgs boson itself the Higgs boson we cannot explain the large difference in mass between different fundamental particles

Roma "La Sapienza", Università di

347

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

E-Print Network (OSTI)

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

Clay, Gabriel Omar

2006-01-01T23:59:59.000Z

348

Energy conversion device with support member having pore channels  

DOE Patents (OSTI)

Energy devices such as energy conversion devices and energy storage devices and methods for the manufacture of such devices. The devices include a support member having an array of pore channels having a small average pore channel diameter and having a pore channel length. Material layers that may include energy conversion materials and conductive materials are coaxially disposed within the pore channels to form material rods having a relatively small cross-section and a relatively long length. By varying the structure of the materials in the pore channels, various energy devices can be fabricated, such as photovoltaic (PV) devices, radiation detectors, capacitors, batteries and the like.

Routkevitch, Dmitri [Longmont, CO; Wind, Rikard A [Johnstown, CO

2014-01-07T23:59:59.000Z

349

Modeling of multipath fading channels for network simulation  

E-Print Network (OSTI)

Development of accurate physical layer models is very important for generating realistic network simulation results. Significant effort has been put into setting up physical layer models for wireless channels that emulate the impact of the channel on the higher layers of the network. Setting up the models is especially difficult for a frequency selective channel. In this thesis the use of non-linear functions to convert the frequency selective channel to an equivalent flat fading channel is examined. The analytical expressions for the statistics of the equivalent flat fading process that are needed to set up the physical layer models are derived. These results are used to set up the physical layer model for the frequency selective channel. Extensive simulations are performed to verify the accuracy of the model against a detailed physical layer implementation. The statistics of the model and the actual channel are seen to match, validating the method of setting up the models.

Rajkumar Samuel,

2007-05-01T23:59:59.000Z

350

Rip Channel Morphodynamics at Pensacola Beach, Florida  

E-Print Network (OSTI)

80% of all lifeguard related rescues along the beaches of northwest Florida are believed to be related to rip currents. A rip current is the strong flow of water, seaward extending from the beach to the breaker line. It has previously been shown that there are rip current hot spots at Pensacola Beach, forced by a ridge and swale topography offshore, but the annual evolution/behavior of these hotspots (i.e. location, size, frequency, and orientation) have not been examined in detail. Remote imagery from Casino Beach was rectified to a planar view in order to examine the rip channel characteristics. These characteristics were analyzed to determine variations and patterns on a daily, monthly, and seasonal basis and in relation to reset storms, wind and wave characteristics, and the beach states of Casino Beach in order to characterize the rip development and variation throughout a year. Beach states and rip configurations were impacted by many frontal storms and one tropical storm, which were classified as a reset storm when reconfigurations of the beach state and rips occurred. Given sufficient time between reset storms, the bar migrated onshore in a manner consistent with the Wright and Short (1984) model, transitioning from LBT, to RBB, and finally to TBR state. The lack of reset storms after March 2010 resulted in a large frequency of observed rip channels (64) between April and May. It is shown that these rip channels are clustered into 7 statistically significant groups based on their location alongshore at the 95 % confidence interval. It is argued that the rip channel clusters are a direct result of the wave forcing caused by the ridge and swale topography. This situation causes the bar to move onshore that without interruption of a reset storm will attach at certain locations creating a transverse bar and rip morphology. The bar appears to attach to the beach at consistent locations throughout the year creating similar rip locations and subsequently the rip clusters. The risk posed to beach users by these rip currents is concentrated in certain locations which are persistent throughout the year.

Labude, Daniel

2012-12-01T23:59:59.000Z

351

Channeling and dechanneling at high energy  

SciTech Connect

The possibility of using channeling as a tool for high energy particle physics has now been extensively investigated. Bent crystals have been used as an accelerator extraction element and for particle deflection. Applications as accelerating devices have been discussed but appear remote. The major advantage in using a bent crystal rather than a magnet is the large deflection that can be achieved in a short length. The major disadvantage is the low transmission. A good understanding of dechanneling is important for applications. 43 refs., 1 fig., 3 tabs.

Carrigan, R.A. Jr.

1987-09-30T23:59:59.000Z

352

Alpha Channeling in a Rotating Plasma  

E-Print Network (OSTI)

The wave-particle alpha-channeling effect is generalized to include rotating plasma. Specifically, radio frequency waves can resonate with alpha particles in a mirror machine with ExB rotation to diffuse the alpha particles along constrained paths in phase space. Of major interest is that the alpha-particle energy, in addition to amplifying the RF waves, can directly enhance the rotation energy which in turn provides additional plasma confinement in centrifugal fusion reactors. An ancillary benefit is the rapid removal of alpha particles, which increases the fusion reactivity.

Fetterman, Abraham J

2008-01-01T23:59:59.000Z

353

Corrosion and arc erosion in MHD channels  

DOE Green Energy (OSTI)

The objective of this task is to study the corrosion and arc erosion of MHD materials in a cooperative effort with, and to support, the MHD topping cycle program. Materials tested in the Avco Research Laboratory/Textron facility, or materials which have significant MHD importance, will be analyzed to document their physical deterioration. Conclusions shall be drawn about their wear mechanisms and lifetime in the MHD environment with respect to the following issues; sulfur corrosion, electrochemical corrosion, and arc erosion. The impact of any materials or slag conditions on the level of power output and on the level of leakage current in the MHD channel will also be noted, where appropriate.

Rosa, R.J. (Montana State Univ., Bozeman, MT (United States). Dept. of Mechanical Engineering); Pollina, R.J. (Montana State Univ., Bozeman, MT (United States). Dept. of Mechanical Engineering Avco-Everett Research Lab., Everett, MA (United States))

1991-10-01T23:59:59.000Z

354

Strategic motive of introducing Internet channels in a supply chain  

E-Print Network (OSTI)

Rapid advances of information technology in recent years have enabled both the manufacturers and the retailers to operate their own Internet channels. In this paper, we investigate the interaction between the capabilities of introducing the Internet channels, the pricing strategies, and the channel structure. We classify consumers into two segments: Grocery shoppers attach a higher utility from purchasing through the physical channel, whereas a priori Internet shoppers prefer purchasing online. We find that when the Internet shoppers are either highly profitable or fairly unimportant, the manufacturer prefers to facilitate the channel separation either through his own Internet channel or the retailer’s. In the intermediate region, however, the manufacturer encroaches the grocery shoppers and steals the demand from the retailer’s physical channel. With horizontal competition between retailers, a priori symmetric retailers may adopt different channel strategies as a stable market equilibrium. The manufacturer may willingly give up his Internet channel and leverage on the retailer competition. When the manufacturer sells through an online e-tailer, Internet shoppers may be induced to purchase through the physical channel. This reverse encroachment strategy emerges because selling through the e-tailer leads to a more severe double marginalization problem.

Lu Hsiao; Ying-ju Chen

2012-01-01T23:59:59.000Z

355

Computer analysis of four channel x-ray microscopy images to obtain source and spectral emission data on laser fusion targets  

SciTech Connect

A description is given of how a typical four channel microscope experiment is recorded and processed. The computer code MISE is described. Seventeen figures showing various results are given. (MOW)

Harper, T.L.

1975-12-01T23:59:59.000Z

356

Fe XII STALKS AND THE ORIGIN OF THE AXIAL FIELD IN FILAMENT CHANNELS  

SciTech Connect

Employing Fe XII images and line-of-sight magnetograms, we deduce the direction of the axial field in high-latitude filament channels from the orientation of the adjacent stalklike structures. Throughout the rising phase of the current solar cycle 24, filament channels poleward of latitude 30 Degree-Sign overwhelmingly obeyed the hemispheric chirality rule, being dextral (sinistral) in the northern (southern) hemisphere, corresponding to negative (positive) helicity. During the deep minimum of 2007-2009, the orientation of the Fe XII stalks was often difficult to determine, but no obvious violations of the rule were found. Although the hemispheric trend was still present during the maximum and early declining phase of cycle 23 (2000-2003), several high-latitude exceptions were identified at that time. From the observation that dextral (sinistral) filament channels form through the decay of active regions whose Fe XII features show a counterclockwise (clockwise) whorl, we conclude that the axial field direction is determined by the intrinsic helicity of the active regions. In contrast, generation of the axial field component by the photospheric differential rotation is difficult to reconcile with the observed chirality of polar crown and circular filament channels, and with the presence of filament channels along the equator. The main role of differential rotation in filament channel formation is to expedite the cancellation of flux and thus the removal of the transverse field component. We propose further that, rather than being ejected into the heliosphere, the axial field is eventually resubmerged by flux cancellation as the adjacent unipolar regions become increasingly mixed.

Wang, Y.-M.; Sheeley, N. R. Jr. [Space Science Division, Naval Research Laboratory, Washington, DC 20375 (United States); Stenborg, G., E-mail: yi.wang@nrl.navy.mil, E-mail: neil.sheeley@nrl.navy.mil, E-mail: guillermo.stenborg.ctr.ar@nrl.navy.mil [George Mason University, Fairfax, VA 22030 (United States)

2013-06-10T23:59:59.000Z

357

Optimal Power Control and SourceChannel Coding for Delay Constrained Traffic over Wireless Channels  

E-Print Network (OSTI)

problem -- the optimal power and rate allocation results in high data rates when the channel gain is high state of the Markov chain that affect the chain's transition probabilities. Each action will incur some, . probability distributions describing state transitions, . functions denoting the reward earned for each action

Goldsmith, Andrea

358

Abyssal Channel Flow in Ocean General Circulation Models with Application to the Vema Channel  

Science Conference Proceedings (OSTI)

An idealized Cox model is shown to pass a flux given by g?H2/2f though a deep channel, single grid-box wide, consistent with analytical models. This flux can, however, be significantly increased or decreased by the presence of density gradients ...

Martin R. Wadley; Grant R. Bigg

1996-01-01T23:59:59.000Z

359

Capacity Definitions for General Channels with Receiver Side Information  

E-Print Network (OSTI)

We consider three capacity definitions for general channels with channel side information at the receiver, where the channel is modeled as a sequence of finite dimensional conditional distributions not necessarily stationary, ergodic, or information stable. The {\\em Shannon capacity} is the highest rate asymptotically achievable with arbitrarily small error probability. The {\\em capacity versus outage} is the highest rate asymptotically achievable with a given probability of decoder-recognized outage. The {\\em expected capacity} is the highest average rate asymptotically achievable with a single encoder and multiple decoders, where the channel side information determines the decoder in use. As a special case of channel codes for expected rate, the code for capacity versus outage has two decoders: one operates in the non-outage states and decodes all transmitted information, and the other operates in the outage states and decodes nothing. Expected capacity equals Shannon capacity for channels governed by a sta...

Effros, Michelle; Liang, Yifan

2008-01-01T23:59:59.000Z

360

Probing the quantumness of channels with mixed states  

Science Conference Proceedings (OSTI)

We present an alternative approach to the derivation of benchmarks for quantum channels, such as memory or teleportation channels. Using the concept of effective entanglement and the verification thereof, a testing procedure is derived which demands very few experimental resources. The procedure is generalized by allowing for mixed test states. By constructing optimized measure and reprepare channels, the benchmarks are found to be very tight in the considered experimental regimes.

Haeseler, Hauke; Luetkenhaus, Norbert [Institute for Quantum Computing and Department of Physics and Astronomy, University of Waterloo (Canada) and Quantum Information Theory Group, University of Erlangen (Germany)

2009-10-15T23:59:59.000Z

Note: This page contains sample records for the topic "two-photon channel shows" 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

On-Line Monitoring of Instrument Channel Performance  

Science Conference Proceedings (OSTI)

This topical report presents an alternate approach to instrument channel surveillance (i.e., monitoring and verifying instrument channel performance) that provides several additional benefits and is more cost-effective. This alternative is on-line monitoring, which is based on the assessed in-operation performance of an instrument channel. This report also provides technical information and discusses the licensing aspects of implementing an on-line monitoring program.

1998-11-25T23:59:59.000Z

362

Classical capacity of quantum channels with general Markovian correlated noise  

E-Print Network (OSTI)

The classical capacity of a quantum channel with arbitrary Markovian correlated noise is evaluated. For the general case of a channel with long-term memory, which corresponds to a Markov chain which does not converge to equilibrium, the capacity is expressed in terms of the communicating classes of the Markov chain. For an irreducible and aperiodic Markov chain, the channel is forgetful, and one retrieves the known expression for the capacity.

Nilanjana Datta; Tony Dorlas

2007-12-05T23:59:59.000Z

363

Atomistic Simulations of Hydrogen Effects in Channel Materials  

Science Conference Proceedings (OSTI)

As part of its efforts to ensure the reliable operation of nuclear fuel, the Electric Power Research Institute (EPRI) has been an active participant in the development and implementation of the Channel Distortion Industry Action Plan (CDIAP), an industrywide response to concerns surrounding control blade interference caused by channel distortion. The CDIAP outlines an integrated plan to manage channel distortion in the near term and ultimately to eliminate the issue.This EPRI product ...

2013-09-05T23:59:59.000Z

364

Rural grocery stores use of communication channels: exploratory study.  

E-Print Network (OSTI)

??This is an exploratory study looking at the communication channels used in the relationship between rural grocers and rural community members in four Kansas communities.… (more)

Brown, Carmen F.

2013-01-01T23:59:59.000Z

365

Quantum state discrimination with bosonic channels and Gaussian states  

E-Print Network (OSTI)

Discriminating between quantum states is an indispensable part of quantum information theory. This thesis investigates state discrimination of continuous quantum variables, focusing on bosonic communication channels and ...

Tan, Si Hui, Ph. D. Massachusetts Institute of Technology

2010-01-01T23:59:59.000Z

366

CLUSTERING OF CYCLIC-NUCLEOTIDE-GATED CHANNELS IN OLFACTORY CILIA.  

E-Print Network (OSTI)

??Cyclic nucleotide gated (CNG) channels play an important role in mediating sensory signal transduction in olfactory receptor neurons, which takes place primarily in olfactory cilia.… (more)

FLANNERY, RICHARD JOHN

2006-01-01T23:59:59.000Z

367

Optimal sequential transmission over broadcast channel with nested feedback  

E-Print Network (OSTI)

We consider the optimal design of sequential transmission over broadcast channel with nested feedback. Nested feedback means that the channel output of the outer channel is also available at the decoder of the inner channel. We model the communication system as a decentralized team with three decision makers---the encoder and the two decoders. Structure of encoding and decoding strategies that minimize a total distortion measure over a finite horizon are determined. The results are applicable for real-time communication as well as for the information theoretic setup.

Mahajan, Aditya

2010-01-01T23:59:59.000Z

368

Radio channel modeling for mobile ad hoc wireless networks .  

E-Print Network (OSTI)

??The radio channel places fundamental limitations on the performance of mobile ad hoc wireless networks. In the mobile radio environment, fading due to multipath delay… (more)

Sng, Sin Hie

2004-01-01T23:59:59.000Z

369

Proton Channel Orientation in Block-Copolymer Electrolyte Membranes  

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

Proton Channel Orientation in Block-Copolymer Electrolyte Membranes Print Fuel cells have the potential to provide power for a wide variety of applications ranging from electronic...

370

Introduction to side channel attacks and non invasive attacks  

Science Conference Proceedings (OSTI)

... FIPS conference side channel attacks and perturbation attacks 7 Pow er analysis Pow er leakage usec m A Instruction fetch Instruction processing ...

2007-09-21T23:59:59.000Z

371

Classical capacity of a qubit depolarizing channel with memory  

E-Print Network (OSTI)

The classical product state capacity of a noisy quantum channel with memory is investigated. A forgetful noise-memory channel is constructed by Markov switching between two depolarizing channels which introduces non-Markovian noise correlations between successive channel uses. The computation of the capacity is reduced to an entropy computation for a function of a Markov process. A reformulation in terms of algebraic measures then enables its calculation. The effects of the hidden-Markovian memory on the capacity are explored. An increase in noise-correlations is found to increase the capacity.

Jeroen Wouters; Ismail Akhalwaya; Mark Fannes; Francesco Petruccione

2009-01-16T23:59:59.000Z

372

An efficient multi-channel wireless switching system  

E-Print Network (OSTI)

the scheduling operation in wireless switching systems. Thefor the local operation between a wireless switch port andoperations in interference-rich multi-channel wireless

Shim, Jaewook

2010-01-01T23:59:59.000Z

373

Multi-channel medical imaging system  

Science Conference Proceedings (OSTI)

A medical imaging system provides simultaneous rendering of visible light and fluorescent images. The system may employ dyes in a small-molecule form that remain in the subject's blood stream for several minutes, allowing real-time imaging of the subject's circulatory system superimposed upon a conventional, visible light image of the subject. The system may provide an excitation light source to excite the fluorescent substance and a visible light source for general illumination within the same optical guide used to capture images. The system may be configured for use in open surgical procedures by providing an operating area that is closed to ambient light. The systems described herein provide two or more diagnostic imaging channels for capture of multiple, concurrent diagnostic images and may be used where a visible light image may be usefully supplemented by two or more images that are independently marked for functional interest.

Frangioni, John V

2013-12-31T23:59:59.000Z

374

Multi-channel medical imaging system  

DOE Patents (OSTI)

A medical imaging system provides simultaneous rendering of visible light and fluorescent images. The system may employ dyes in a small-molecule form that remain in the subject's blood stream for several minutes, allowing real-time imaging of the subject's circulatory system superimposed upon a conventional, visible light image of the subject. The system may provide an excitation light source to excite the fluorescent substance and a visible light source for general illumination within the same optical guide used to capture images. The system may be configured for use in open surgical procedures by providing an operating area that is closed to ambient light. The systems described herein provide two or more diagnostic imaging channels for capture of multiple, concurrent diagnostic images and may be used where a visible light image may be usefully supplemented by two or more images that are independently marked for functional interest.

Frangioni, John V

2013-12-31T23:59:59.000Z

375

Power module assemblies with staggered coolant channels  

DOE Patents (OSTI)

A manifold is provided for supporting a power module assembly with a plurality of power modules. The manifold includes a first manifold section. The first face of the first manifold section is configured to receive the first power module, and the second face of the first manifold section defines a first cavity with a first baseplate thermally coupled to the first power module. The first face of the second manifold section is configured to receive the second power module, and the second face of the second manifold section defines a second cavity with a second baseplate thermally coupled to the second power module. The second face of the first manifold section and the second face of the second manifold section are coupled together such that the first cavity and the second cavity form a coolant channel. The first cavity is at least partially staggered with respect to second cavity.

Herron, Nicholas Hayden; Mann, Brooks S; Korich, Mark D

2013-07-16T23:59:59.000Z

376

Bonneville Power Administration's YouTube Channel  

DOE Data Explorer (OSTI)

The Bonneville Power Administration is one of DOE's four power marketing administration organizations. BPA describes its mission as a public service organization as one designed create and deliver the best value for our customers and constituents as we act in concert with others to assure the Pacific Northwest: 1) An adequate, efficient, economical and reliable power supply; 2) A transmission system that is adequate to the task of integrating and transmitting power from federal and non-federal generating units, providing service to BPA's customers, providing interregional interconnections, and maintaining electrical reliability and stability; and 3) Mitigation of the Federal Columbia River Power System's impacts on fish and wildlife. The more than 100 videos on BPA's YouTube channel are organized into 12 playlists, including: Technology R&D, Renewable Energy, Hydropower, Energy Efficiency and Conservation, Transmission, Environment, Fish, and Wildlife, Vegetation Management and Public Safety, Value of the River Education Series, and Community and Education.

377

Multiple channel optical data acquisition system  

DOE Patents (OSTI)

A multiple channel optical data acquisition system is provided in which a plurality of remote sensors monitoring specific process variable are interrogated by means of a single optical fiber connecting the remote station/sensors to a base station. The remote station/sensors derive all power from light transmitted through the fiber from the base station. Each station/sensor is individually accessed by means of a light modulated address code sent over the fiber. The remote station/sensors use a single light emitting diode to both send and receive light signals to communicate with the base station and provide power for the remote station. The system described can power at least 100 remote station/sensors over an optical fiber one mile in length.

Fasching, G.E.; Goff, D.R.

1985-02-22T23:59:59.000Z

378

Helical Muon Beam Cooling Channel Engineering Design  

SciTech Connect

The Helical Cooling Channel (HCC), a novel technique for six-dimensional (6D) ionization cooling of muon beams, has shown considerable promise based on analytic and simulation studies. However, the implementation of this revolutionary method of muon cooling requires new techniques for the integration of hydrogen-pressurized, high-power RF cavities into the low-temperature superconducting magnets of the HCC. We present the progress toward a conceptual design for the integration of 805 MHz RF cavities into a 10 T Nb{sub 3}Sn based HCC test section. We include discussions on the pressure and thermal barriers needed within the cryostat to maintain operation of the magnet at 4.2 K while operating the RF and energy absorber at a higher temperature. Additionally, we include progress on the Nb{sub 3}Sn helical solenoid design.

Kashikhin, V.S.; Lopes, M.L.; Romanov, G.V.; Tartaglia, M.A.; Yonehara, K.; Yu, M.; Zlobin, A.V.; /Fermilab; Flanagan, G.; Johnson, R.P.; Kazakevich, G.M.; Marhauser, F.; /MUONS Inc., Batavia

2012-05-01T23:59:59.000Z

379

Theory of the ion-channel laser  

Science Conference Proceedings (OSTI)

A relativistic electron beam propagating through a plasma in the ion-focussed regime exhibits an electromagnetic instability with peak growth rate near a resonant frequency {omega}{approximately}2 {gamma}{sup 2} {omega}{beta}, where {gamma} is the Lorentz factor and {omega}{beta} is the betatron frequency. The physical basis for this instability is that an ensemble of relativistic simple harmonic oscillators, weakly driven by an electromagnetic wave, will lose energy to the wave through axial bunching. This bunching'' corresponds to the development of an rf component in the beam current, and a coherent centroid oscillation. The subject of this thesis is the theory of a laser capitalizing on this electromagnetic instability. A historical perspective is offered. The basic features of relativistic electron beam propagation in the ion-focussed regime are reviewed. The ion-channel laser (ICL) instability is explored theoretically through an eikonal formalism, analgous to the KMR'' formalism for the free-electron laser (FEL). The dispersion relation is derived, and the dependence of growth rate on three key parameters is explored. Finite temperature effects are assessed. From this work it is found that the typical gain length for amplification is longer than the Rayleigh length and we go on to consider three mechanisms which will tend to guide waveguide. First, we consider the effect of the ion channel as a dielectric waveguide. We consider next the use of a conducting waveguide, appropriate for a microwave amplifier. Finally, we examine a form of optical guiding'' analgous to that found in the FEL. The eikonal formalism is used to model numerically the instability through and beyond saturation. Results are compared with the numerical simulation of the full equations of motion, and with the analytic scalings. The analytical requirement on detuning spread is confirmed.

Whittum, D.H.

1990-09-01T23:59:59.000Z

380

Fault control of channel sandstones in Dakota Formation, southwest Powder River basin, Wyoming  

SciTech Connect

The Dakota Formation is an important oil reservoir in the southwestern Powder River basin and adjoining Casper arch. Two fields, Burke Ranch and South Cole Creek, are used as examples to show the depositional environments of the Dakota and to indicate the influence of tectonic control on the distribution of the environments. Burke Ranch field is a stratigraphic trap which produces oil from the upper bench of the Dakota. The environment of deposition of the reservoir, determined by subsurface analysis, is a channel sandstone. South Cole Creek field is a structural-stratigraphic trap which produces from the lower bench of the Dakota. Two distinct facies, a channel and channel margin sandstone, exist at South Cole Creek. At both Burke Ranch and South Cole Creek it can be shown that the Dakota channels were deposited on the downthrown side of faults, which were present during Dakota time and which now are reflected on the surface by drainage patterns. An understanding of the environments of deposition of the Dakota and control of the environments by paleotectonics is necessary for exploration for these prolific reservoirs.

Moore, W.R.

1983-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "two-photon channel shows" 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

Dimensional Behavior of Fuel Channels - Recent Experience and Consequences  

SciTech Connect

Fuel channels in boiling-water reactors (BWR) undergo distortions like bow, bulge, and twist due to their operating conditions. These distortions may adversely impact planned operating strategy, and therefore need to be adequately addressed during various stages of fuel channel design and manufacturing, core design and operation monitoring. Fuel channel distortion may lead to interference between the fuel channel and adjacent control blade. If severe, such interference can impair both positioning of control blades during normal operations and rapid control blade insertion during a reactor scram. During the last five years, unexpectedly high fuel channel distortions leading to problems in control blade operations have been observed in some C- and S-lattice BWR plants in the U.S. operating on 18 - 24 month cycles. As a result, U.S. operators have implemented costly surveillance programs to detect the onset of high distortions and have declared control blades inoperable when unacceptable control blade operation occurs. This unusual fuel channel distortion has not been observed with AREVA NP fuel supplied in Europe in this scale. Nevertheless fuel channel distortion-related problems were recently observed in reactors outside the U.S. with early control blade operation. The mechanisms causing this unexpected fuel-channel distortion and the influencing factors are not completely understood worldwide for the time being. Therefore, a prediction of channels which will exhibit high bow is very challenging. A status is given from the AREVA NP perspective on: - The existing fuel channel distortion database, - The understanding of the phenomenon, - Measures to gather further information and improve existing tools, materials, and designs, and - Customer actions to reduce potential high channel bow and associated control blade issues. (authors)

Blavius, Dirk [AREVA NP Inc., VA 24506 Lynchburg (United States); Muench, Claus-Juergen [AREVA NP GmbH, 91050 Erlangen (Germany); Garner, Norman L. [AREVA NP Inc., WA 99354 Richland (United States)

2007-07-01T23:59:59.000Z

382

Vehicle Technologies Office: 3-D Animation Shows Complex Geometry of Diesel  

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

3-D Animation Shows 3-D Animation Shows Complex Geometry of Diesel Particulates to someone by E-mail Share Vehicle Technologies Office: 3-D Animation Shows Complex Geometry of Diesel Particulates on Facebook Tweet about Vehicle Technologies Office: 3-D Animation Shows Complex Geometry of Diesel Particulates on Twitter Bookmark Vehicle Technologies Office: 3-D Animation Shows Complex Geometry of Diesel Particulates on Google Bookmark Vehicle Technologies Office: 3-D Animation Shows Complex Geometry of Diesel Particulates on Delicious Rank Vehicle Technologies Office: 3-D Animation Shows Complex Geometry of Diesel Particulates on Digg Find More places to share Vehicle Technologies Office: 3-D Animation Shows Complex Geometry of Diesel Particulates on AddThis.com... 3-D Animation Shows Complex Geometry of Diesel Particulates

383

First principal components analysis: a new side channel distinguisher  

Science Conference Proceedings (OSTI)

Side Channel Analysis (SCA) are of great concern since they have shown their efficiency in retrieving sensitive information from secure devices. In this paper we introduce First Principal Components Analysis (FPCA) which consists in evaluating the relevance ... Keywords: CPA, DPA, DoM, VPA, data encryption standard (DES), masking countermeasures, principal component analysis (PCA), side channel attacks

Youssef Souissi; Maxime Nassar; Sylvain Guilley; Jean-Luc Danger; Florent Flament

2010-12-01T23:59:59.000Z

384

Multidimensional Coded Modulation in Block-Fading Channels  

Science Conference Proceedings (OSTI)

We study coded modulation over multidimensional signal sets in Nakagami-m block-fading channels. We consider the optimal diversity reliability exponent of the error probability when the multidimensional constellation is obtained as the rotation of complex-plane ... Keywords: Block-fading channels, diversity, linear rotations, maximum distance-separable (MDS) codes, outage probability

A. Guillen i Fabregas; G. Caire

2008-05-01T23:59:59.000Z

385

Columbia River Channel Improvement Project Rock Removal Blasting: Monitoring Plan  

SciTech Connect

This document provides a monitoring plan to evaluate take as outlined in the National Marine Fisheries Service 2002 Biological Opinion for underwater blasting to remove rock from the navigation channel for the Columbia River Channel Improvement Project. The plan was prepared by the Pacific Northwest National Laboratory (PNNL) for the U.S. Army Corps of Engineers (USACE), Portland District.

Carlson, Thomas J.; Johnson, Gary E.

2010-01-29T23:59:59.000Z

386

Leakage resilient strong key-insulated signatures in public channel  

Science Conference Proceedings (OSTI)

Key-insulation aims at minimizing (i.e., compartmentalizing) the damage of users from key exposures, and traditionally requires a private channel of communication between a user and a semi-trusted party called a helper to refresh the private keys. The ... Keywords: continual key leakage, key-insulation, public channel, signatures

Le Trieu Phong; Shin'ichiro Matsuo; Moti Yung

2010-12-01T23:59:59.000Z

387

Asymptotic analysis of UEP fountain codes over BIAWGN channels  

Science Conference Proceedings (OSTI)

In many communication systems, it is necessary to use unequal error protection (UEP) techniques. The design issues of UEP fountain codes over the binary erasure channel (BEC) have been extensively studied in recent years. In this paper, we investigate ... Keywords: BIAWGN channels, EWF codes, UEP-LT codes, semi-Gaussian approximation

Lei Yuan; Jianping An; Xiangming Li; Jing Yang

2010-06-01T23:59:59.000Z

388

Recent advances in Multi-Channel Algebraic Scattering  

SciTech Connect

For coupled-channel descriptions of low-energy nucleon-induced interactions involving nuclei with particle-unstable exited states, it is necessary to include the widths of the target states. How those widths may affect the elastic scattering cross sections is examined within the framework of the Multi-Channel Algebraic Scattering (MCAS) method.

Karataglidis, S. [Department of Physics, University of Johannesburg, P.O. Box 524, Auckland Park, 2006 (South Africa); Fraser, P. R. [Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, 04150, Mexico, D.F. (Mexico); Amos, K. [School of Physics, University of Melbourne, Victoria, 3010 (Australia); Canton, L.; Pisent, G. [Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 (Italy); Svenne, J. P. [Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, R3T 2N2 (Canada); Knijff, D. van der [Advanced Research Computing, Information Division, University of Melbourne, Victoria, 3010 (Australia)

2011-10-28T23:59:59.000Z

389

Channel assignment in cellular networks with synchronous base stations  

Science Conference Proceedings (OSTI)

A radio spectrum is a shared, limited, and expensive resource in cellular networks. A network allocates a channel from this spectrum to provide connectivity to a user. With the ever increasing number of users, it is a challenge and a business opportunity ... Keywords: cellular networks, dynamic channel assignment

Kshirasagar Naik; David S.L. Wei; Stephan Olariu

2005-10-01T23:59:59.000Z

390

Application of the GRP scheme to open channel flow equations  

Science Conference Proceedings (OSTI)

The GRP (generalized Riemann problem) scheme, originally conceived for gasdynamics, is reformulated for the numerical integration of the shallow water equations in channels of rectangular cross-section, variable width and bed profile, including a friction ... Keywords: Generalized Riemann problem (GRP), Hydraulic jump, Hyperbolic conservation laws, Open channel, Quasi-1D flow, Second-order scheme, Shallow water

A. Birman; J. Falcovitz

2007-03-01T23:59:59.000Z

391

The Energy Harvesting Multiple Access Channel with Energy Storage Losses  

E-Print Network (OSTI)

The Energy Harvesting Multiple Access Channel with Energy Storage Losses Kaya Tutuncuoglu and Aylin considers a Gaussian multiple access channel with two energy harvesting transmitters with lossy energy storage. The power allocation policy maximizing the average weighted sum rate given the energy harvesting

Yener, Aylin

392

A simple mechanism for capturing and replaying wireless channels  

Science Conference Proceedings (OSTI)

Physical layer wireless network emulation has the potential to be a powerful experimental tool. An important challenge in physical emulation, and traditional simulation, is to accurately model the wireless channel. In this paper we examine the possibility ... Keywords: channel capture, emulation, wireless

Glenn Judd; Peter Steenkiste

2005-08-01T23:59:59.000Z

393

LAR Image Transmission over Fading Channels: A Hierarchical Protection Solution  

Science Conference Proceedings (OSTI)

The aim of this paper is to present an efficient scheme to transmit a compressed digital image over a non frequency selective Rayleigh fading channel. The proposed scheme is based on the Locally Adaptive Resolution (LAR) algorithm, and the Reed-Solomon ... Keywords: Fading channels, Locally Adaptive Resolution (LAR), scalability, Unequal Error Protection (UEP), (JPWL)

Wassim Hamidouche; Christian Olivier; Marie Babel; Olivier Deforges; Hervé Boeglen; Pascal Lorenz

2009-07-01T23:59:59.000Z

394

Antarctic Bottom Water Flow through the Hunter Channel  

Science Conference Proceedings (OSTI)

The Rio Grande Rise acts as a natural barrier for the equatorward flow of Antarctic Bottom Water in the subtropical South Atlantic. In addition to the Vema Channel, the Hunter Channel cuts through this obstacle and offers a separate route for ...

Walter Zenk; Gerold Siedler; Bernd Lenz; Nelson G. Hogg

1999-11-01T23:59:59.000Z

395

Renewable Energy Scheduling for Fading Channels with Maximum Power Constraint  

E-Print Network (OSTI)

Renewable Energy Scheduling for Fading Channels with Maximum Power Constraint Zhe Wang Electrical The employment of the renewable energy source has grown from long-established concepts into devices for powering--In this paper, we develop efficient algorithm to obtain the optimal energy schedule for fading channel

Greenberg, Albert

396

Simulation models for side-channel information leaks  

Science Conference Proceedings (OSTI)

Small, embedded integrated circuits (ICs) such as smart cards are vulnerable to so-called side-channel attacks (SCAs). The attacker can gain information by monitoring the power consumption, execution time, electromagnetic radiation and other information ... Keywords: countermeasure, differential power analysis, encryption, security IC, side-channel attack, simulation model, smart card

Kris Tiri; Ingrid Verbauwhede

2005-06-01T23:59:59.000Z

397

Petascale Direct Numerical Simulations of Turbulent Channel Flow  

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

Petascale Petascale Direct Numerical Simulations of Turbulent Channel Flow MyoungKyu Lee mk@ices.utexas.edu Department of Mechanical Engineering University of Texas at Austin ESP Meeting May, 2013 M.K. Lee (Univ of Texas, Austin) Petascale DNS of Turbulent Channel Flow ESP Meeting May, 2013 1 / 30 Contents Project Overview Performance Optimization Early Result Conclusion M.K. Lee (Univ of Texas, Austin) Petascale DNS of Turbulent Channel Flow ESP Meeting May, 2013 2 / 30 Project Overview Project Title â—® Petascale Direct Numerical Simulations of Turbulent Channel Flow Goal â—® Expanding our understand of wall-bounded turbulence Personnel â—® P.I. : Robert Moser â—® Primary Developer : M.K.Lee â—® Software Engineering Support : Nicholas Malaya â—® Catalyst : Ramesh Balakrishnan M.K. Lee (Univ of Texas, Austin) Petascale DNS of Turbulent Channel Flow ESP Meeting May, 2013 3 / 30 Turbulent

398

Collisionless Damping of Laser Wakes in Plasma Channels  

SciTech Connect

Excitation of accelerating modes in transversely inhomogeneous plasma channels is considered as an initial value problem. Discrete eigenmodes are supported by plasma channels with sharp density gradients. These eigenmodes are collisionlessly damped as the gradients are smoothed. Using collisionless Landau damping as the analogy, the existence and damping of these "quasi-modes" is studied by constructing and analytically continuing the causal Green's function of wake excitation into the lower half of the complex frequency plane. Electromagnetic nature of the plasma wakes in the channel makes their excitation nonlocal. This results in the algebraic decay of the fields with time due to phase-mixing of plasma oscillations with spatially-varying fequencies. Characteristic decay rate is given by the mixing time, which corresponds to the dephasing of two plasma fluid elements separated by the collisionless skin depth. For wide channels the exact expressions for the field evolution are derived. Implications for electron acceleration in plasma channels are discussed.

Li, X.; Shvets, G.

1998-08-01T23:59:59.000Z

399

Designer proton-channel transgenic algae for photobiological hydrogen production  

DOE Patents (OSTI)

A designer proton-channel transgenic alga for photobiological hydrogen production that is specifically designed for production of molecular hydrogen (H.sub.2) through photosynthetic water splitting. The designer transgenic alga includes proton-conductive channels that are expressed to produce such uncoupler proteins in an amount sufficient to increase the algal H.sub.2 productivity. In one embodiment the designer proton-channel transgene is a nucleic acid construct (300) including a PCR forward primer (302), an externally inducible promoter (304), a transit targeting sequence (306), a designer proton-channel encoding sequence (308), a transcription and translation terminator (310), and a PCR reverse primer (312). In various embodiments, the designer proton-channel transgenic algae are used with a gas-separation system (500) and a gas-products-separation and utilization system (600) for photobiological H.sub.2 production.

Lee, James Weifu (Knoxville, TN)

2011-04-26T23:59:59.000Z

400

Full Rate Collaborative Diversity Scheme for Multiple Access Fading Channels  

E-Print Network (OSTI)

User cooperation is a well-known approach to achieve diversity without multiple antennas, however at the cost of inevitable loss of rate mostly due to the need of additional channels for relaying. A new collaborative diversity scheme is proposed here for multiple access fading channels to attain full rate with near maximum diversity. This is achieved by allowing two users and their corresponding relays to transmit/forward data on the same channel by exploiting unique spatial-signatures of their fading channels. The base-station jointly detects the co-channel users' data using maximum-likelihood search algorithm over small set of possible data combinations. Full data rate with significant diversity gain near to two-antenna Alamouti scheme is shown.

Shakya, Indu; Stipidis, Elias

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "two-photon channel shows" 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

Optimal finite alphabet sources over partial response channels  

E-Print Network (OSTI)

We present a serially concatenated coding scheme for partial response channels. The encoder consists of an outer irregular LDPC code and an inner matched spectrum trellis code. These codes are shown to offer considerable improvement over the i.i.d. capacity (> 1 dB) of the channel for low rates (approximately 0.1 bits per channel use). We also present a qualitative argument on the optimality of these codes for low rates. We also formulate a performance index for such codes to predict their performance for low rates. The results have been verified via simulations for the (1-D)/sqrt(2) and the (1-D+0.8D^2)/sqrt(2.64) channels. The structure of the encoding/decoding scheme is considerably simpler than the existing scheme to maximize the information rate of encoders over partial response channels.

Kumar, Deepak

2003-08-01T23:59:59.000Z

402

Show me the money! The geography of contributions to California's Proposition 8  

E-Print Network (OSTI)

online maps), is where this money will come from, how muchShow me the money! The geography of contributions toSeries Show me the money! The geography of contributions to

Shin, Michael

2009-01-01T23:59:59.000Z

403

Quantum Mechanical Calculations of Charge Effects on gating the KcsA channel  

DOE Green Energy (OSTI)

The research described in this product was performed in part in the Environmental Molecular Sciences Laboratory, a national scientific user facility sponsored by the Department of Energy's Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory. A series of ab initio (density functional) calculations were carried out on side chains of a set of amino acids, plus water, from the (intracellular) gating region of the KcsA K+ channel. Their atomic coordinates, except hydrogen, are known from X-ray structures [D.A. Doyle, J.M. Cabral, R.A. Pfuetzner, A. Kuo, J.M. Gulbis, S.L. Cohen, B.T. Chait, R. MacKinnon, The structure of the potassium channel: molecular basis of K+ conduction and selectivity, Science 280 (1998) 69–77; R. MacKinnon, S.L. Cohen, A. Kuo, A. Lee, B.T. Chait, Structural conservation in prokaryotic and eukaryotic potassium channels, Science 280 (1998) 106–109; Y. Jiang, A. Lee, J. Chen, M. Cadene, B.T. Chait, R. MacKinnon, The open pore conformation of potassium channels. Nature 417 (2001) 523–526], as are the coordinates of some water oxygen atoms. The 1k4c structure is used for the starting coordinates. Quantum mechanical optimization, in spite of the starting configuration, places the atoms in positions much closer to the 1j95, more tightly closed, configuration. This state shows four water molecules forming a “basket” under the Q119 side chains, blocking the channel. When a hydrated K+ approaches this “basket”, the optimized system shows a strong set of hydrogen bonds with the K+ at defined positions, preventing further approach of the K+ to the basket. This optimized structure with hydrated K+ added shows an ice-like 12 molecule nanocrystal of water. If the water molecules exchange, unless they do it as a group, the channel will remain blocked. The “basket” itself appears to be very stable, although it is possible that the K+ with its hydrating water molecules may be more mobile, capable of withdrawing from the gate. It is also not surprising that water essentially freezes, or forms a kind of glue, in a nanometer space; this agrees with experimental results on a rather different, but similarly sized (nm dimensions) system [K.B. Jinesh, J.W.M. Frenken, Capillary condensation in atomic scale friction: how water acts like a glue, Phys. Rev. Lett. 96 (2006) 166103/1–4].

Kariev, Alisher M.; Znamenskiy, Vasiliy S.; Green, Michael E.

2007-02-06T23:59:59.000Z

404

Channel responses to varying sediment input: A flume experiment modeled after Redwood Creek, California  

E-Print Network (OSTI)

of channel morphology, slope, and armoring in a gravel-bed channel. Under moderate sediment increases was evacuated from the flume and the bed became armored. Under high sediment feed, channel bed elevation, the channel became armored and channel incision ceased before all excess sediment was removed. Selective

405

Show Me the Money: The Dominance of Wealth in Determining Rights Performance in Asia  

E-Print Network (OSTI)

3/21/2005 11:54 AM SHOW ME THE MONEY effect, at least in the3/21/2005 11:54 AM SHOW ME THE MONEY popular support for the11:54 AM SHOW ME THE MONEY: THE DOMINANCE OF WEALTH IN

Peerenboom, Randall P

2005-01-01T23:59:59.000Z

406

Wavelet-based separation of nonlinear show-through and bleed-through image mixtures  

Science Conference Proceedings (OSTI)

This work addresses the separation of the nonlinear real-life mixture of images that occurs when a page of a document is scanned or photographed and the back page shows through. This effect can be due to partial paper transparency (show-through) and/or ... Keywords: Bleed-through, Image enhancement, Image mixture, Nonlinear separation, Show-through

Mariana S. C. Almeida; Luís B. Almeida

2008-12-01T23:59:59.000Z

407

Lipid ion channels and the role of proteins  

E-Print Network (OSTI)

Synthetic lipid membranes in the absence of proteins can display quantized conduction events for ions that are virtually indistinguishable from those of protein channel. By indistinguishable we mean that one cannot decide based on the current trace alone whether conductance events originate from a membrane, which does or does not contain channel proteins. Additional evidence is required to distinguish between the two cases, and it is not always certain that such evidence can be provided. The phenomenological similarities are striking and span a wide range of phenomena: The typical conductances are of equal order and both lifetime distributions and current histograms are similar. One finds conduction bursts, flickering, and multistep-conductance. Lipid channels can be gated by voltage, and can be blocked by drugs. They respond to changes in lateral membrane tension and temperature. Thus, they behave like voltage-gated, temperature-gated and mechano-sensitive protein channels, or like receptors. Lipid channels are remarkably under-appreciated. However, the similarity between lipid and protein channels poses an eminent problem for the interpretation of protein channel data. For instance, the Hodgkin-Huxley theory for nerve pulse conduction requires a selective mechanism for the conduction of sodium and potassium ions. To this end, the lipid membrane must act both as a capacitor and as an insulator. Non-selective ion conductance by mechanisms other than the gated protein-channels challenges the proposed mechanism for pulse propagation. ... Some important questions arise: Are lipid and protein channels similar due a common mechanism, or are these similarities fortuitous? Is it possible that both phenomena are different aspects of the same phenomenon? Are lipid and protein channels different at all? ... (abbreviated)

Lars D. Mosgaard; Thomas Heimburg

2013-07-11T23:59:59.000Z

408

Seismic amplitude and coherency response of channel sand, offshore Louisiana, Gulf of Mexico  

E-Print Network (OSTI)

Geological drilling hazards are a major concern in the ics. drilling and development of offshore reservoirs. Some of these hazards may display high amplitudes on seismic profiles and some may be associated with stratigraphic features. Seismic amplitude anomalies associated with channel sand deposits may indicate potential accumulations of hydrocarbons in reservoirs. However, shallow hydrocarbon accumulations are rarely of production size. More often, they are potential geological drilling hazards that could inhibit the development of petroleum resources from deeper hydrocarbon-bearing layers. Traditionally, existing and potential geologic hazards are identified by interpretation of high-resolution site survey data, acquired specifically for drilling hazard delineation. This paper describes a new technique for drilling hazard identification using a conventional 3D seismic amplitude dataset. An event coherence calculation program is applied to a 3D seismic dataset to derive seismic attributes sufficient to highlight structural and stratigraphic discontinuities in the area. A resultant 3D difference cube is used to establish fault framework and to detect spatial distribution of channel deposits in the area and their geometries. Superposition of the difference cube on seismic amplitude data allows simultaneous display of structural and stratigraphic discontinuities and reflectivity information. Therefore, it is used for the delineation of channels, which show anomalous amplitudes, identification of their dimensions and spatial locations, and implication of gas-charged sand distribution within the detected channel. The paper gives a detailed description of a workflow, which was found sufficient for delineation of likely gas-charged sand channels, and discusses the ways to adjust the proposed workbox to specific objectives.

Fischer, Elena Mikhaylovna

1999-01-01T23:59:59.000Z

409

Outage probability and channel capacity for the Nth best relay selection AF relaying over INID Rayleigh fading channels  

Science Conference Proceedings (OSTI)

Cooperative diversity systems have recently been proposed as a way to form virtual antenna schemes without utilizing collocated multiple antennas. In this paper, we consider the Nth best opportunistic amplify-and-forward (AF) cooperative diversity ... Keywords: Nth best OAF, INID Rayleigh fading channels, channel capacity, cooperative diversity, outage probability

K. Ko; C. Woo

2012-11-01T23:59:59.000Z

410

Rate-adaption channel assignment and routing algorithm for multi-channel wirelessMAN mesh networks  

Science Conference Proceedings (OSTI)

Wireless mesh networks provide an easy deployed and extensible solution to access Internet or communicate with each other for both enterprises and individuals. With the help of multi-channel and multi-radio, wireless mesh network can support more traffic ... Keywords: IEEE 802.16, channel assignment, rate-adaption, routing, wireless mesh network

Eric Hsiao-Kuang Wu; Wei-Li Chang; Hsuan-Hao Chan

2007-07-01T23:59:59.000Z

411

Considering removing "Show Preview" button on utility rate form edit |  

Open Energy Info (EERE)

Considering removing "Show Preview" button on utility rate form edit Considering removing "Show Preview" button on utility rate form edit Home > Groups > Utility Rate Rmckeel's picture Submitted by Rmckeel(297) Contributor 22 April, 2013 - 13:55 Utility Rates I'm considering removing the "Show Preview" button, since it does not work (javascript validation issue that could be fixed), and it doesn't make sense. The reason to remove it would be that this form's output is nearly identical to the form itself. Showing a preview does not add any value. Or does it? Opening the discussion in case anyone has feedback on it. Thanks! Ryan Groups: Utility Rate Login to post comments Comments Dloomis Dloomis34 weeks 6 days ago Show Preview If "show changes" stays around, I think we can do without the "show

412

A Four Channel 250 MHz Visual Counter  

Science Conference Proceedings (OSTI)

A visual counter rated at 250 mhz. with a pulse-pair resolution of 2.6 nanoseconds for nuclear instrument module (NIM) signals has been designed. Pulse widths for NIM signals must be equal to or greater than 2 ns. The counter has a separate input for transistor-transistor logic (TTL) signals and for this logic level it operates at rates equal to or less than 190 mhz. TTL pulses must be greater than 4 ns. The design was implemented on a printed circuit card. Four of these cards were packaged into a single unit resulting in a four channel device that can be mounted into a 19 inch rack. Seven units were built; they are presently used in the experimental area and in the Main Control Room of the Bevalac. The counter accepts well defined NIM or TTL signals internally terminated with 50 ohms. All the controls and the signal input connectors are located on the front panel. An Overflow output, Gate, and Reset inputs are located on the back panel. The counters have 8 Light Emitting Diode digit displays which are 20.3 mm high with a viewing distance rating of 10 meters. Light filters are used for the LED displays greatly enhancing their visibility.

Flores, I.; Blando, P.; Crawford, H.; Engelage, J.; Greiner, L.; Ko, S.; Krebs, G.; Visser, G.

1992-04-01T23:59:59.000Z

413

Entrance-channel dependence of fission transients  

E-Print Network (OSTI)

Fission transients describe the fission rate as it evolves towards the quasistationary value given by Kramers' formula. The nature of fission transients is dependent on the assumed initial distribution of the compound nuclei along the fission coordinate. Although the standard initial assumption of a near-spherical object leads to a transient suppression of the fission rate (fission delay), a moderate initial fissionlike deformation can reduce the magnitude of this suppression. For still larger initial deformations, transient fission enhancements are possible. Examples of this behavior are illustrated via a one-dimensional Langevin simulation. It is argued that the initial conditions are determined by the fusion dynamics and thus are entrance-channel dependent. Transient fission may be considered intermediate between statistical fission and quasifission as the rapid time scale of transient fission may not lead to an equilibrium of the angular and mass-asymmetry coordinates. The relationship between the mean first passage time and the transients are discussed. For temperatures much smaller than the fission barrier, the mean first passage time is independent of the nature of the fission transients if there is no strong competition from evaporation. Thus, fission transients are most important when the evaporation time scale is smaller than, or of the order of, the transient time.

R. J. Charity

2004-06-14T23:59:59.000Z

414

DOE Solar Decathlon: Team Missouri: Showing the World the Possibilities of  

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

Show-Me House at the U.S. Department of Energy Solar Decathlon 2009. Show-Me House at the U.S. Department of Energy Solar Decathlon 2009. Enlarge image Team Missouri's Show-Me House joined three other Solar Decathlon houses in Missouri University of Science and Technology's own Solar Village. The Show-Me House incorporates long, horizontal lines to reflect the state's landscape. (Courtesy of Bryan Glass) Who: Team Missouri What: Show-Me House Where: Missouri University of Science and Technology Rolla, MO 65401 Map This House Public tours: Not available Solar Decathlon 2009 Team Missouri: Showing the World the Possibilities of Solar Team Missouri's U.S. Department of Energy Solar Decathlon 2009 house returned to the Missouri University of Science and Technology campus following the competition. It was reconstructed over summer 2010 in the

415

"Show Preview" button is not working; gives error | OpenEI Community  

Open Energy Info (EERE)

"Show Preview" button is not working; gives error "Show Preview" button is not working; gives error Home > Groups > Utility Rate Submitted by Ewilson on 3 January, 2013 - 09:52 1 answer Points: 0 Eric, thanks for reporting this. I checked with stakeholders (http://en.openei.org/community/node/657) and decided since the edit view and the "show preview" view would be nearly identical, it wasn't worth keeping the show preview button. However, "Show changes" will show text changes for the utility rates, which is valuable when making a change. Thanks for reporting - this bug is now fixed! Ryan Rmckeel on 17 May, 2013 - 10:30 Groups Menu You must login in order to post into this group. Recent content FYI, OpenEI now accommodates t... Very useful information. Thank... The utility rate database version 1 API is now deprecated

416

Experimental studies of laser guiding in plasma channels  

DOE Green Energy (OSTI)

The authors present results of experimental investigations of laser guiding in plasma channels. A new technique for plasma channel creation, the Ignitor-Heater scheme is proposed and experimentally tested in hydrogen and nitrogen. It makes use of two laser pulses. The Ignitor, an ultrashort (< 100 fs) laser pulse, is brought to a line focus using a cylindrical lens to ionize the gas. The Heater pulse (160 ps long) is used subsequently to heat the existing spark via inverse Bremsstrahlung. The hydrodynamic shock expansion creates a partially evacuated plasma channel with a density minimum on axis. Such a channel has properties of an optical waveguide. This technique allows, creation of plasma channels in low atomic number gases, such as hydrogen, which is of importance for guiding of highly intense laser pulses. The channel density was diagnosed with time resolved longitudinal interferometry. From these measurements the plasma temperature was inferred. The guiding properties of the channels were tested by injecting a > 5 {times} 10{sup 17} W/cm{sup 2}, 75 fs laser pulse.

Volfbeyn, P.; Leemans, W.P.

1998-07-01T23:59:59.000Z

417

National American Indian Housing Council 38th Annual Convention and Trade Show  

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

The National American Indian Housing Council's (NAIHC’s) most longstanding annual event, the Annual Convention & Trade Show is an opportunity to learn about Indian housing, attend training...

418

Gratification obtained from television shows on Internet TV and conventional TV.  

E-Print Network (OSTI)

??Television shows once available only on conventional TV in homes at specific days and times are now available via Internet TV in nearly any location,… (more)

Li, Nai-Se

2013-01-01T23:59:59.000Z

419

igure 1. Map of N. Alaska and NW Canada Showing the Locations of ...  

U.S. Energy Information Administration (EIA)

Figure 1. Map of Northern Alaska and Northwestern Canada Showing the Locations of the National Petroleum Reserve-Alaska (NPR-A), Arctic National Wildlife Refuge ...

420

Effects of cryogenic equal channel angular deformation on copper 101  

E-Print Network (OSTI)

Grain size in polycrystalline metallic materials significantly influences physical and mechanical properties. At room temperature, large grain size is generally associated with low strength, hardness and ductility. Fine grained microstructures show an increase in strength due to a larger grain boundary surface area per unit volume. One way to obtain fine grained microstructures is through cold working and recrystallization of the material. In this study, oxygen-free high-conductivity copper 101 was cold worked by being subjected to severe plastic deformation (SPD) at room temperature (23 °C) and at -196 °C under liquid nitrogen. Cold working was imparted by equal channel angular deformation (ECAD). Before extrusions were performed, a special ECAD tool was designed and built, which was capable of operating under the high loads resulting from forcing a billet through the die at -196 °C. Hardness, tensile strength, electrical resistivity and annealing experiments were performed following deformation along with optical microscopy and transmission electron microscopy (TEM) to observe changes in properties and grain morphology.

Horan, Christopher Sean

2001-01-01T23:59:59.000Z

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


421

On the capacity limits of hvac duct channel for high-speed internet access  

E-Print Network (OSTI)

Abstract—In this paper, we report theoretical and experimental channel-capacity estimates of heating, ventilation, and air conditioning (HVAC) ducts based on multicarrier transmission that uses-ary quadrature amplitude modulation and measured channel responses at the 2.4-GHz industrial, scientific, and medical band. It is shown theoretically that data rates in excess of 1 Gb/s are possible over distances up to 500 m in straight ducts in which reflections have been suppressed. Our experimental results also show that even in the case of more complex HVAC duct networks (i.e., HVAC duct networks that include bends, tees, etc.) data rates over 2 Gb/s are possible. Our estimations in this case are valid for distances of up to 22 m, which was the maximum distance of our experimental setup. These experimental results, measured with a large-scale testbed set

Ariton E. Xhafa; Ozan K. Tonguz; Ahmet G. Cepni; Student Member; Daniel D. Stancil; Pavel V. Nikitin; Dagfin Brodtkorb

2005-01-01T23:59:59.000Z

422

Random Access Game in Fading Channels with Capture: Equilibria and Braess-like Paradoxes  

E-Print Network (OSTI)

The Nash equilibrium point of the transmission probabilities in a slotted ALOHA system with selfish nodes is analyzed. The system consists of a finite number of heterogeneous nodes, each trying to minimize its average transmission probability (or power investment) selfishly while meeting its average throughput demand over the shared wireless channel to a common base station (BS). We use a game-theoretic approach to analyze the network under two reception models: one is called power capture, the other is called signal to interference plus noise ratio (SINR) capture. Contrary to one's intuition, we show analytically the occurrence of Braess-like paradoxes that the performance of the system may degrade when channel state information (CSI) is available at the nodes.

Hsu, Fu-Te

2010-01-01T23:59:59.000Z

423

On the capacity of interference channels with one cooperating transmitter  

E-Print Network (OSTI)

Inner and outer bounds are established on the capacity region of two-sender, two-receiver interference channels where one transmitter knows both messages. The transmitter with extra knowledge is referred to as being cognitive. The inner bound is based on strategies that generalize prior work, and include rate-splitting, Gel’fand-Pinsker coding and cooperative transmission. A general outer bound is based on the Nair-El Gamal outer bound for broadcast channels. A simpler bound is presented for the case in which one of the decoders can decode both messages. The bounds are evaluated and compared for Gaussian channels.

Ivana Mari?; Andrea Goldsmith; Gerhard Kramer; Shlomo Shamai (Shitz)

2007-01-01T23:59:59.000Z

424

Linear signal-compensated amplifier for reactor power measuring channels  

Science Conference Proceedings (OSTI)

A linear amplifier with automatic signal compensation has been developed for nuclear channels. The amplifier controls its sensitivity automatically according to the reference input within the desired settings and has automatic signal compensation capability for use in the nuclear channels. The amplifier will be used in the existing safety channel of Pakistan Research Reactor-1, where the system has an independent sensitivity control unit for manual compensation of xenon effect. The new amplifier will improve the safety of the system. The amplifier is tested and the results found are in very good agreement with the designed specifications. This article presents design and construction of the amplifier and test results.

Khaleeq, M. Tahir; Atique-ur-Rahman,; Ahmed, Eijaz [Electronics Division, PINSTECH, Islamabad 44000 (Pakistan); F. G. Post Graduate College H-8, Islamabad, 44000 (Pakistan)

2006-07-15T23:59:59.000Z

425

A perceptual measure of trade shows using fuzzy quality deployment development  

Science Conference Proceedings (OSTI)

In the past researches on the evaluation of trade shows (TSs), visitors were mostly assumed to conduct aggregating partial deliberations, which were analyzed with a single step procedure, yet unable to derive a whole picture of TSs. An organizer of trade ... Keywords: FDSS, Fuzzy quality function deployment, Trade shows

Ling-Zhong Lin

2010-05-01T23:59:59.000Z

426

Two New Studies Show How Energy Consumers Respond to Smart Grid Technology  

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

New Studies Show How Energy Consumers Respond to Smart Grid New Studies Show How Energy Consumers Respond to Smart Grid Technology Two New Studies Show How Energy Consumers Respond to Smart Grid Technology February 14, 2011 - 3:24pm Addthis Home-energy display mobile phone application that shows how much energy an appliance is consuming. | Photo courtesy of Pecan Street Project. Home-energy display mobile phone application that shows how much energy an appliance is consuming. | Photo courtesy of Pecan Street Project. Matt Grosso Program Analyst, Office of Electricity Delivery & Energy Reliability What does this mean for me? Home smart grid technologies can help consumers save money -- and they use them to save money. Customers are willing to change the way they use electricity in response to home smart grid systems and dynamic pricing programs that save

427

X-ray Imaging Shows Feather Patterns of First Birds | Department of Energy  

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

X-ray Imaging Shows Feather Patterns of First Birds X-ray Imaging Shows Feather Patterns of First Birds X-ray Imaging Shows Feather Patterns of First Birds June 30, 2011 - 2:56pm Addthis A collage of images. Top, optical images of: blue jay feather, squid, and fossil fish with feather. Bottom: x-ray images showing the distribution of copper (red) in the same organisms. | Photo Courtesy of Gregory Stewart, SLAC National Accelerator Laboratory A collage of images. Top, optical images of: blue jay feather, squid, and fossil fish with feather. Bottom: x-ray images showing the distribution of copper (red) in the same organisms. | Photo Courtesy of Gregory Stewart, SLAC National Accelerator Laboratory Niketa Kumar Niketa Kumar Public Affairs Specialist, Office of Public Affairs What are the key facts? Through x-ray fluorescent imaging techniques developed at the

428

The Consumer Electronics Show round-up | OpenEI Community  

Open Energy Info (EERE)

The Consumer Electronics Show round-up The Consumer Electronics Show round-up Home > Groups > OpenEI Community Central Graham7781's picture Submitted by Graham7781(2002) Super contributor 23 January, 2013 - 13:57 CES electronics home automation Las Vegas OpenEI Smart Grid Every January, Las Vegas hosts the Consumer Electronics Show. The CES is the world's largest technology-related trade show. The highlights of this year's show were OLED TVs, ultra-thin laptops, tablets, and smartphones. However, a few smart grid-related technologies were making an impression. There was a wide-range of tech related to home automation. Some of these devices included HVAC, lighting, audio-visual, shading, security, automated door locks, and security, all controllable my multiple in-home devices. These technologies, along with the "smart grid", are all the make-up of a

429

Annual report shows potential INL radiation dose well below safe regulatory  

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

Annual report shows potential INL radiation dose well below safe Annual report shows potential INL radiation dose well below safe regulatory limits Annual report shows potential INL radiation dose well below safe regulatory limits August 9, 2011 - 12:00pm Addthis Media Contact Tim Jackson, DOE-Idaho Operations Office 208-526-8484 The U.S. Department of Energy's Idaho Operations Office reported this month that radiation from the site falls well below limits established by the U.S. Environmental Protection Agency. The annual report's conclusions are supported by direct environmental monitoring data routinely taken during the year, and show that activities at the Idaho National Laboratory (INL) site are protective of human health and the environment. Data shows that the INL site potential radiation dose is less than 1% of

430

Activity-dependent modulation of rod photoreceptor cyclic nucleotide-gated channels mediated by phosphorylation of a specific tyrosine residue  

E-Print Network (OSTI)

Cyclic nucleotide-gated (CNG) channels in vertebrate photoreceptors are crucial for transducing light-induced changes in cGMP concentration into electrical signals. In this study, we show that both native and exogenously expressed CNG channels from rods are modulated by tyrosine phosphorylation. The cGMP sensitivity of CNG channels, composed of rod ?-subunits expressed in Xenopus oocytes, gradually increases after excision of inside-out patches from the oocyte membrane. This increase in sensitivity is inhibited by a protein tyrosine phosphatase (PTP) inhibitor and is unaffected by three different Ser/Thr phosphatase inhibitors. Moreover, it is suppressed or reversed by application of ATP but not by a nonhydrolyzable ATP analog. Application of protein tyrosine kinase (PTK) inhibitors causes an increase in cGMP sensitivity, but only in the presence of ATP. Taken together, these results suggest that

Elena Molokanova; Bhavya Trivedi; Alexei Savchenko; Richard H. Kramer

1999-01-01T23:59:59.000Z

431

STUDY OF MOTOR OIL COOLING AT LOW REYNOLDS NUMBER IN MULTI-PORT NARROW CHANNELS.  

E-Print Network (OSTI)

??Mini and micro-scale channels have drawn researchers' attention in the past three decades. The use of these channels in a heat exchanger is due to… (more)

Saadi, Mohammed

2012-01-01T23:59:59.000Z

432

Data Transmission over Speech Coded Voice Channels; Datatransmission över Talkodade Kanaler.  

E-Print Network (OSTI)

?? The voice channel in mobile communication systems have high priority and are almost always available. By using the voice channel also for data transmissions… (more)

Tyrberg, Andreas

2006-01-01T23:59:59.000Z

433

Feedback between erosional morphology, sediment transport and abrasion in the transient adjustment of fluvial bedrock channels  

E-Print Network (OSTI)

This thesis explores the dependence of bedrock channel incision on coarse sediment supply through laboratory flume experiments and quantitative field observations of evolving channel morphology. Predictions of the ...

Johnson, Joel Peterson

2007-01-01T23:59:59.000Z

434

Spectrally efficient underwater acoustic communications : channel characterization and design aspects for OFDM  

E-Print Network (OSTI)

with L = 9 for an underwater channel impulse response with Ladaptive modulation in underwater acoustic communications,”Adaptive OFDM for underwater acoustic channels with limited

Radoševi?, Andreja

2012-01-01T23:59:59.000Z

435

Aperture-Tolerant, Chemical-Based Methods to Reduce Channeling  

Science Conference Proceedings (OSTI)

This final technical progress report describes work performed from October 1, 2004, through May 16, 2007, for the project, 'Aperture-Tolerant, Chemical-Based Methods to Reduce Channeling'. We explored the potential of pore-filling gels for reducing excess water production from both fractured and unfractured production wells. Several gel formulations were identified that met the requirements--i.e., providing water residual resistance factors greater than 2,000 and ultimate oil residual resistance factors (F{sub rro}) of 2 or less. Significant oil throughput was required to achieve low F{sub rro} values, suggesting that gelant penetration into porous rock must be small (a few feet or less) for existing pore-filling gels to provide effective disproportionate permeability reduction. Compared with adsorbed polymers and weak gels, strong pore-filling gels can provide greater reliability and behavior that is insensitive to the initial rock permeability. Guidance is provided on where relative-permeability-modification/disproportionate-permeability-reduction treatments can be successfully applied for use in either oil or gas production wells. When properly designed and executed, these treatments can be successfully applied to a limited range of oilfield excessive-water-production problems. We examined whether gel rheology can explain behavior during extrusion through fractures. The rheology behavior of the gels tested showed a strong parallel to the results obtained from previous gel extrusion experiments. However, for a given aperture (fracture width or plate-plate separation), the pressure gradients measured during the gel extrusion experiments were much higher than anticipated from rheology measurements. Extensive experiments established that wall slip and first normal stress difference were not responsible for the pressure gradient discrepancy. To explain the discrepancy, we noted that the aperture for gel flow (for mobile gel wormholing through concentrated immobile gel within the fracture) was much narrower than the width of the fracture. The potential of various approaches were investigated for improving sweep in parts of the Daqing Oil Field that have been EOR targets. Possibilities included (1) gel treatments that are directed at channeling through fractures, (2) colloidal dispersion gels, (3) reduced polymer degradation, (4) more viscous polymer solutions, and (5) foams and other methods. Fractures were present in a number of Daqing wells (both injectors and producers). Because the fractures were narrow far from the wellbore, severe channeling did not occur. On the contrary, fractures near the wellbore aided reservoir sweep. In the February 2006 issue of the Journal of Petroleum Technology, a 'Distinguished-Author-Series' paper claimed that a process using aqueous colloidal dispersion gels (CDG gels) performed superior to polymer flooding. Unfortunately, this claim is misleading and generally incorrect. Colloidal dispersion gels, in their present state of technological development, should not be advocated as an improvement to, or substitute for, polymer flooding.

Randall S. Seright

2007-09-30T23:59:59.000Z

436

Observations of the Behavior and Distribution of Fish in Relation to the Columbia River Navigation Channel and Channel Maintenance Activities  

SciTech Connect

This report is a compilation of 7 studies conducted for the U.S. Army Corps of Engineers between 1995 and 1998 which used hydroacoustic methods to study the behavior of migrating salmon in response to navigation channel maintenance activities in the lower Columbia River near river mile 45. Differences between daytime and nighttime behavior and fish densities were noted. Comparisons were made of fish distribution across the river (in the channel, channel margin or near shore) and fish depth upstream and downstream of dikes, dredges, and pile driving areas.

Carlson, Thomas J.; Ploskey, Gene R.; Johnson, R. L.; Mueller, Robert P.; Weiland, Mark A.; Johnson, P. N.

2001-10-19T23:59:59.000Z

437

Methods of Using Alpha Channeling Together with Transformer Recharging |  

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

Methods of Using Alpha Channeling Together with Transformer Recharging Methods of Using Alpha Channeling Together with Transformer Recharging A tokamak current can be sustained using rf waves for transformer recharging at low density and high-Z with high efficiency if the resistivity is kept high enough during the radio frequency recharging stage. At the same time, operation in the hot ion mode via alpha channeling increases the effective fusion reactivity. The two separate inventions can be made to work synergistically. Specifically, by operating the tokamak in a low-density recharge phase, the lower hybrid wave penetrates the plasma more effectively. High reactivity is obtained by operation in the hot ion mode through the alpha channeling technique. Then, by using a high temperature relaxation stage, not only is the plasma current sustained

438

Steam Generator Group Project. Task 6. Channel head decontamination  

SciTech Connect

The Steam Generator Group Project utilizes a retired-from-service pressurized-water-reactor steam generator as a test bed and source of specimens for research. An important preparatory step to primary side research activities was reduction of the radiation field in the steam generator channel head. This task report describes the channel head decontamination activities. Though not a programmatic research objective it was judged beneficial to explore the use of dilute reagent chemical decontamination techniques. These techniques presented potential for reduced personnel exposure and reduced secondary radwaste generation, over currently used abrasive blasting techniques. Two techniques with extensive laboratory research and vendors prepared to offer commercial application were tested, one on either side of the channel head. As indicated in the report, both techniques accomplished similar decontamination objectives. Neither technique damaged the generator channel head or tubing materials, as applied. This report provides details of the decontamination operations. Application system and operating conditions are described.

Allen, R.P.; Clark, R.L.; Reece, W.D.

1984-08-01T23:59:59.000Z

439

Multiple Shaker potassium channels in a primitive metazoan  

E-Print Network (OSTI)

Voltage-gated potassium channels are critical elements in providing functional diversity in nervous systems. The diversity of voltage-gated K+ channels in modern triploblastic metazoans (such as mollusks, arthropods and vettebrates) is provided primarily by four gene subfamilies (Shaker, Shal, Shab, and Shaw), but there has been no data from the ancient diploblastic metazoans until now. Diploblasts, represented by jellyfish and other coelenterates, arose during the first major metazoan radiation and are the most structurally primitive animals to have true nervous systems. By comparing the K+ channels of diploblasts and triploblasts, we may determine the fundamental set of K+ channels present in the first nervous systems. We now report the isolation of two Shaker subfamily cDNA clones, jShak1 and jShak2, from the hydrozoan jellyfish Polyorchis

Timothy Jegla; Nikita Grigoriev; Z Warren J. Gallin; Lawrence Salkoff; Andrew N. Spencer

1995-01-01T23:59:59.000Z

440

The Multi-Channel Infrared Sea Truth Radiometric Calibrator (MISTRC)  

Science Conference Proceedings (OSTI)

A new multichannel infrared sea truth radiometer has been designed and built to improve validation of satellite-determined sea surface temperature. Horizontal grid polarized filters installed on the shortwave channels are very effective in ...

M. J. Suarez; W. J. Emery; G. A. Wick

1997-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "two-photon channel shows" 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

A Newly Found Jet in North Kenya (Turkana Channel)  

Science Conference Proceedings (OSTI)

On the basis of recent pilot balloon observations which have become available in northern Kenya, it is shown that there exists a strong southeasterly low-level jet in the Turkana Channel which separates the Ethiopian Highlands the East African ...

J. H. Kinuthia; G. C. Asnani

1982-11-01T23:59:59.000Z

442

The Higgs Boson in the Golden Channel | Argonne National Laboratory  

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

The Higgs Boson in the Golden Channel October 8, 2013 3:00PM to 4:00PM Presenter Jamie Gainer, University of Florida Location Building 362, Room E188 Type Seminar Series HEP...

443

Return channel loss reduction in multi-stage centrifugal compressors  

E-Print Network (OSTI)

This thesis presents concepts for improving the performance of return channels in multi-stage centrifugal compressors. Geometries have been developed to reduce both separation and viscous losses. A number of different ...

Aubry, Anne-Raphaëlle

2012-01-01T23:59:59.000Z

444

Results on combinatorial joint source-channel coding  

E-Print Network (OSTI)

This paper continues the investigation of the combinatorial formulation of the joint source-channel coding problem. In particular, the connections are drawn to error-reducing codes, isometric embeddings and list-decodable ...

Kochman, Yuval

445

Flow-optimized Cooperative Transmission for the Relay Channel  

E-Print Network (OSTI)

This paper describes an approach for half-duplex cooperative transmission to achieve cooperative diversity in a classical three-node relay channel. Assuming availability of channel state information at the source and relay, the approach makes use of this information to optimize distinct flows through the direct link from the source to the destination and the path via the relay, respectively. It is shown that such a design can effectively obtain diversity advantage of the relay channel in both high-rate and low-rate scenarios. When the rate requirement is low, the proposed design gives a second-order outage diversity performance approaching that of full-duplex relaying. When the rate requirement becomes asymptotically large, the design still gives a close-to-second-order outage diversity performance. The design also achieves the best diversity-multiplexing tradeoff possible for the relay channel.

Wong, Tan F; Shea, John M

2007-01-01T23:59:59.000Z

446

Multiple-user quantum information theory for optical communication channels  

E-Print Network (OSTI)

Research in the past decade has established capacity theorems for point-to-point bosonic channels with additive thermal noise, under the presumption of a conjecture on the minimum output von Neumann entropy. In the first ...

Guha, Saikat, 1980-

2008-01-01T23:59:59.000Z

447

Channel engineering of SOI MOSFETs for RF applications  

E-Print Network (OSTI)

Channel engineering of SOI MOSFETs is explored by altering ion implantation without adding any new fabrication steps to the standard CMOS process. The effects of implantation on characteristics important for RF applications, ...

Keast, Craig L.

448

A virtual channel technique for supporting P2P streaming  

Science Conference Proceedings (OSTI)

Nowadays, some powerful client devices, e.g., smart phone, set top boxes and digital video recorders, are commonly used to enhance digital TV broadcasting services. This paper proposes a virtual channel platform by organizing these client devices to ...

Jau-Wu Huang; Nien-Chen Lin; Kai-Chao Yang; Chen-Lung Chan; Jia-Shung Wang

2011-09-01T23:59:59.000Z

449

Meteosat and GOES-East Imager Visible Channel Calibration  

Science Conference Proceedings (OSTI)

As a preliminary step to solar irradiance calculations, the Centre de Météorologie Spatiale (CMS) has developed a pragmatic approach to calibrate the visible channels of Meteosat and GOES-East imagers. The responsivity of the Meteosat visible ...

Pierre Le Borgne; Gérard Legendre; Anne Marsouin

2004-11-01T23:59:59.000Z

450

On the Security and Degradability of Gaussian Channels  

E-Print Network (OSTI)

We consider the notion of canonical attacks, which are the cryptographic analog of the canonical forms of a one-mode Gaussian channel. Using this notion, we explore the connections between the degradability properties of ...

Pirandola, Stefano

2009-01-01T23:59:59.000Z

451

Rotating Shocks in a Separated Laboratory Channel Flow  

Science Conference Proceedings (OSTI)

Laboratory studies of the effects of wall separation on a hydraulic jump in a rotating channel of rectangular cross section are described. Separation is induced by increasing the rotation rate while maintaining a constant flow rate through the ...

L. J. Pratt

1987-04-01T23:59:59.000Z

452

Diversity with practical channel estimation in arbitrary fading environments  

E-Print Network (OSTI)

This thesis presents a framework for evaluating the bit error probability of Nd-branch diversity combining in the presence of non-ideal channel estimates. The estimator structure is based on the maximum likelihood (ML) ...

Gifford, Wesley M. (Wesley Michael), 1979-

2004-01-01T23:59:59.000Z

453

Ionized channel generation of an intense relativistic electron beam  

DOE Patents (OSTI)

An intense relativistic electron beam generator uses an ionized channel to guide electrons from a cathode past an anode to a remote location without the use of a foil.

Frost, C.A.; Leifeste, G.T.; Shope, S.L.

1986-03-31T23:59:59.000Z

454

Gravity Currents in Confined Channels with Environmental Shear  

Science Conference Proceedings (OSTI)

This study examines properties of gravity currents in confined channels with sheared environmental flow. Under the assumptions of steady and inviscid flow, two-dimensional analytic solutions are obtained for a wide range of shear values. The slope ...

George H. Bryan; Richard Rotunno

455

Simulations of Subtropical Cyclones in a Baroclinic Channel Model  

Science Conference Proceedings (OSTI)

The present study considers a variety of cyclone developments that occur in an idealized, baroclinic channel model featuring full condensation heating effects over an ocean with prescribed sea surface temperature variation. The geostrophic basic-...

Christopher A. Davis

2010-09-01T23:59:59.000Z

456

Numerical Study of Gravity Currents in a Channel  

Science Conference Proceedings (OSTI)

A three-dimensional primitive-equation model was used to study gravity currents produced by instantaneous releases of a buoyant fluid in a rectangular channel. Without rotation, the gravity current passes through two distinct phases: an initial ...

Dong-Ping Wang

1985-03-01T23:59:59.000Z

457

MIMO capacity convergence in frequency-selective channels  

E-Print Network (OSTI)

The dependence of multi-antenna capacity on bandwidth is characterized empirically for narrowband, wideband and ultrawideband indoor channels using spatial and polar arrays. It is shown that both the mean and the outage ...

Malik, Wasim Q.

458

Is the Faroe Bank Channel Overflow Hydraulically Controlled?  

Science Conference Proceedings (OSTI)

The overflow of dense water from the Nordic Seas through the Faroe Bank Channel (FBC) has attributes suggesting hydraulic control—primarily an asymmetry across the sill reminiscent of flow over a dam. However, this aspect has never been confirmed ...

James B. Girton; Lawrence J. Pratt; David A. Sutherland; James F. Price

2006-12-01T23:59:59.000Z

459

New Study Shows Solar Manufacturing Costs Not Driven Primarily by Labor |  

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

Study Shows Solar Manufacturing Costs Not Driven Primarily by Study Shows Solar Manufacturing Costs Not Driven Primarily by Labor New Study Shows Solar Manufacturing Costs Not Driven Primarily by Labor September 5, 2013 - 12:00pm Addthis Production scale, not lower labor costs, drives China's current advantage in manufacturing photovoltaic (PV) solar energy systems, according to a new report released today by the Energy Department's National Renewable Energy Laboratory (NREL) and the Massachusetts Institute of Technology (MIT). Although the prevailing belief is that low labor costs and direct government subsidies for PV manufacturing in China account for that country's dominance in PV manufacturing, the NREL/MIT study shows that a majority of the region's competitive advantage comes from production scale-enabled, in part, through preferred access to capital (indirect

460

New Report Shows Trend Toward Larger Offshore Wind Systems, with 11  

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

Report Shows Trend Toward Larger Offshore Wind Systems, with 11 Report Shows Trend Toward Larger Offshore Wind Systems, with 11 Advanced Stage Projects Proposed in U.S. Waters New Report Shows Trend Toward Larger Offshore Wind Systems, with 11 Advanced Stage Projects Proposed in U.S. Waters October 23, 2013 - 10:52am Addthis The Energy Department today released a new report showing progress for the U.S. offshore wind energy market in 2012, including the completion of two commercial lease auctions for federal Wind Energy Areas and 11 commercial-scale U.S. projects representing over 3,800 megawatts (MW) of capacity reaching an advanced stage of development. Further, the report highlights global trends toward building offshore turbines in deeper waters and using larger, more efficient turbines in offshore wind farms, increasing the amount of electricity delivered to consumers.

Note: This page contains sample records for the topic "two-photon channel shows" 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

New Study Shows Solar Manufacturing Costs Not Driven Primarily by Labor |  

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

New Study Shows Solar Manufacturing Costs Not Driven Primarily by New Study Shows Solar Manufacturing Costs Not Driven Primarily by Labor New Study Shows Solar Manufacturing Costs Not Driven Primarily by Labor September 5, 2013 - 12:00pm Addthis Production scale, not lower labor costs, drives China's current advantage in manufacturing photovoltaic (PV) solar energy systems, according to a new report released today by the Energy Department's National Renewable Energy Laboratory (NREL) and the Massachusetts Institute of Technology (MIT). Although the prevailing belief is that low labor costs and direct government subsidies for PV manufacturing in China account for that country's dominance in PV manufacturing, the NREL/MIT study shows that a majority of the region's competitive advantage comes from production scale-enabled, in part, through preferred access to capital (indirect

462

Regional Partnership Documentary Wins "Best of Show" Aurora Award |  

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

Regional Partnership Documentary Wins "Best of Show" Aurora Award Regional Partnership Documentary Wins "Best of Show" Aurora Award Regional Partnership Documentary Wins "Best of Show" Aurora Award April 30, 2013 - 1:18pm Addthis Washington, DC - A documentary co-produced by Prairie Public Broadcasting (Fargo, N.D.) and the Plains CO2 Reduction (PCOR) Partnership with support from the U.S. Department of Energy has received a 2012 Platinum Best of Show Aurora Award-the highest honor awarded-in the nature/environment documentary category. Global Energy and Carbon: Tracking Our Footprint demonstrates global energy use by average families in industrialized, emerging, and developing economies and explores carbon management options that ensure adequate energy access for the world's growing population. Documentaries such as this are important outreach tools for informing the

463

What is the appropriate way to show LED lighting in COMcheck...  

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

Policies Glossary Related Links ACE Learning Series What is the appropriate way to show LED lighting in COMcheck? The following steps should be used to account for LED lighting in...

464

Show me the Data! EIA.gov Just Got Even Better | Department of Energy  

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

Show me the Data! EIA.gov Just Got Even Better Show me the Data! EIA.gov Just Got Even Better Show me the Data! EIA.gov Just Got Even Better February 9, 2011 - 11:18am Addthis Show me the Data! EIA.gov Just Got Even Better Ginny Simmons Ginny Simmons Former Managing Editor for Energy.gov, Office of Public Affairs The U.S. Energy Information Administration (EIA) just launched a brand new website that includes new features, even more information, and improved navigation. The new site is the latest in a comprehensive initiative to improve the agency's capacity to achieve its mission -- collecting, analyzing, and disseminating independent and impartial energy information. Among the site's new features is "Today in Energy," focusing on timely energy topics and issues with interactive charts, published every weekday.

465

Secretary Chu Speaks at the 2010 Washington Auto Show | Department of  

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

Speaks at the 2010 Washington Auto Show Speaks at the 2010 Washington Auto Show Secretary Chu Speaks at the 2010 Washington Auto Show Addthis Description at the 2010 Washington Auto Show, Secretary Chu lays out a roadmap for how the U.S. can lead the world in making the clean vehicles we need. He also announced that the Department of Energy had closed on a $1.4 billion loan to Nissan to build the all-electric LEAF in Tennessee and create up to 1,300 American jobs. Speakers Secretary Steven Chu Duration 15:14 Topic Vehicles Oil Energy Economy Energy Policy Credit Energy Department Video SECRETARY STEVEN CHU: We are dependent on foreign oil. Right now, transportation fuels are almost totally dependent on petroleum. Our consumption is increasing. Our production is going down. And so how do we break the heavy dependency on foreign oil is one of our issues.

466

U-207: Pidgin 'mxit_show_message()' Function Stack-Based Buffer Overflow  

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

7: Pidgin 'mxit_show_message()' Function Stack-Based Buffer 7: Pidgin 'mxit_show_message()' Function Stack-Based Buffer Overflow Vulnerability U-207: Pidgin 'mxit_show_message()' Function Stack-Based Buffer Overflow Vulnerability July 9, 2012 - 7:00am Addthis PROBLEM: Pidgin 'mxit_show_message()' Function Stack-Based Buffer Overflow Vulnerability. PLATFORM: Versions prior to Pidgin 2.10.5 vulnerable. ABSTRACT: Pidgin is prone to a stack-based buffer-overflow vulnerability REFERENCE LINKS: The Vendor's Advisory Bugtraq ID: 54322 CVE-2012-3374 IMPACT ASSESSMENT: Medium Discussion: Incorrect handing of inline images in incoming instant messages can cause a buffer overflow and in some cases can be exploited to execute arbitrary code. Impact: Successful exploits of the buffer-overflow issue may lead to the execution of arbitrary code in the context of the application or to denial-of-service

467

Simulations Show That "Sweaty" Flowers Cool the World - NERSC SCience News  

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

Show Show That "Sweaty" Flowers Cool the World Simulations Show That "Sweaty" Flowers Cool the World July 19, 2010 | Tags: Climate Research Contact: Linda Vu, lvu@lbl.gov, +1 510 486 2402 The blue regions of this world map show where annual precipitation is higher because of the presence of flowering plants, according to NERSC supercomputer simulations. (Courtesy of C.K. Boyce and J.-E. Lee) The world is a cooler, wetter place because of transpiring flowers, say University of Chicago researchers who ran more than a million lines of code on the National Energy Research Scientific Computing Center's (NERSC's) IBM Power5 "Bassi" system last year. They found that this effect is especially pronounced in the Amazon basin, where 80 percent of ever-wet rainforest

468

Secretary Chu Tours the 2013 Washington Auto Show | Department of Energy  

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

Tours the 2013 Washington Auto Show Tours the 2013 Washington Auto Show Secretary Chu Tours the 2013 Washington Auto Show January 31, 2013 - 5:04pm Addthis 1 of 10 While at the Washington Auto Show, Energy Secretary Steven Chu visited Nissan to see the 2013 Leaf. | Photo courtesy of Sarah Gerrity, Energy Department. Date taken: 2013-01-31 13:50 2 of 10 The new Nissan Leaf is being built at the company's Smyrna, Tennessee, Vehicle Assembly Plant -- helping to cut the price of its electric vehicle. | Photo courtesy of Sarah Gerrity, Energy Department. Date taken: 2013-01-31 13:49 3 of 10 Energy Secretary Steven Chu discusses the features of the 2014 Cadillac ELR -- the luxury car built built on the same powertrain platform as the Chevy Volt. | Photo courtesy of Sarah Gerrity, Energy Department. Date taken: 2013-01-31 13:57

469

U-207: Pidgin 'mxit_show_message()' Function Stack-Based Buffer Overflow  

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

207: Pidgin 'mxit_show_message()' Function Stack-Based Buffer 207: Pidgin 'mxit_show_message()' Function Stack-Based Buffer Overflow Vulnerability U-207: Pidgin 'mxit_show_message()' Function Stack-Based Buffer Overflow Vulnerability July 9, 2012 - 7:00am Addthis PROBLEM: Pidgin 'mxit_show_message()' Function Stack-Based Buffer Overflow Vulnerability. PLATFORM: Versions prior to Pidgin 2.10.5 vulnerable. ABSTRACT: Pidgin is prone to a stack-based buffer-overflow vulnerability REFERENCE LINKS: The Vendor's Advisory Bugtraq ID: 54322 CVE-2012-3374 IMPACT ASSESSMENT: Medium Discussion: Incorrect handing of inline images in incoming instant messages can cause a buffer overflow and in some cases can be exploited to execute arbitrary code. Impact: Successful exploits of the buffer-overflow issue may lead to the execution of arbitrary code in the context of the application or to denial-of-service

470

ORISE report shows number of health physics Ph.D.s declined in...  

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

ORISE report shows number of health physics Ph.D.s declined in 2009 FOR IMMEDIATE RELEASE June 15, 2010 FY10-37 OAK RIDGE, Tenn.-Health physics undergraduate degrees increased...

471

EERE News: Reports Show Record High U.S. Wind Energy Production...  

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

Reports Show Record High U.S. Wind Energy Production and Manufacturing August 06, 2013 Two men work on the nacelle of a wind turbine. The Energy Department released two new reports...

472

New LLNL research shows the moon's core was active later than...  

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

013moon 05102013 New LLNL research shows the moon's core was active later than original estimates Anne M Stark, LLNL, (925) 422-9799, stark8@llnl.gov Printer-friendly East limb...

473

igure 1. Map of N. Alaska and NW Canada Showing the Locations...  

Gasoline and Diesel Fuel Update (EIA)

1. Map of Northern Alaska and Northwestern Canada Showing the Locations of the National Petroleum Reserve-Alaska (NPR-A), Arctic National Wildlife Refuge (ANWR), 1002 Area, Current...

474

UWB channel estimation using new generating TR transceivers  

SciTech Connect

The present invention presents a simple and novel channel estimation scheme for UWB communication systems. As disclosed herein, the present invention maximizes the extraction of information by incorporating a new generation of transmitted-reference (Tr) transceivers that utilize a single reference pulse(s) or a preamble of reference pulses to provide improved channel estimation while offering higher Bit Error Rate (BER) performance and data rates without diluting the transmitter power.

Nekoogar, Faranak (San Ramon, CA); Dowla, Farid U. (Castro Valley, CA); Spiridon, Alex (Palo Alto, CA); Haugen, Peter C. (Livermore, CA); Benzel, Dave M. (Livermore, CA)

2011-06-28T23:59:59.000Z

475

Cofrentes EOC18 Poolside Measurements of BWR Channels  

Science Conference Proceedings (OSTI)

This report presents the fuel channel bow, growth, bulge, and twist measurements taken in Cofrentes Nuclear Power Plant in 2011 during end of cycle (EOC) 18. Channels of different fuel design (SVEA-96 Optima-2, GE-14, and ATRIUM-10XP) from three fuel vendors (Westinghouse, GNF, and AREVA) were measured in the same operating (24 month cycle) and plant chemistry conditions (Online NobleChem, hydrogen water chemistry, and Zn injection). This measurement campaign complements the campaigns performed at EOC16 ...

2012-07-30T23:59:59.000Z

476

Plasma impedance and electron density in a pulsed laser channel  

Science Conference Proceedings (OSTI)

The representation of plasma impedance of gas laserdischarge and spark gap channels by an inductance–capacitance (L p ?C p ) tank circuit has been useful in describing the frequency response of a pulsed superradiant laser charging circuit. The impedance matching of these plasma channels can lead to resonant narrowing of the laser pulsewidth in superradiant nitrogen lasers. Using fluid equations to model the electron and ion plasmas

K. H. Tsui; G. H. Cavalcanti; A. S. Farias; M. D. S. Marinha; L. M. Soares; C. A. Massone

1996-01-01T23:59:59.000Z

477

Ca 2? permeation in cyclic nucleotide-gated channels  

E-Print Network (OSTI)

Cyclic nucleotide-gated (CNG) channels conduct Na ?, K ? and Ca2 ? currents under the control of cGMP and cAMP. Activation of CNG channels leads to depolarization of the membrane voltage and to a concomitant increase of the cytosolic Ca2 ? concentration. Several polypeptides were identified that constitute principal and modulatory subunits of CNG channels in both neurons and non-excitable cells, co-assembling to form a variety of heteromeric proteins with distinct biophysical properties. Since the contribution of each channel type to Ca2 ? signaling depends on its specific Ca2 ? conductance, it is necessary to analyze Ca2 ? permeation for each individual channel type. We have analyzed Ca2 ? permeation in all principal subunits of vertebrates and for a principal subunit from Drosophila melanogaster. We measured the fractional Ca2 ? current over the physiological range of Ca2 ? concentrations and found that Ca2 ? permeation is determined by subunit composition and modulated by membrane voltage and extracellular pH. Ca2 ? permeation is controlled by the Ca2?-binding affinity of the intrapore cation-binding site, which varies profoundly between members of the CNG channel family, and gives rise to a surprising diversity in the ability to generate Ca2 ? signals.

Claudia Dzeja; Volker Hagen; Stephan Frings

1999-01-01T23:59:59.000Z

478

On X-Channels with Feedback and Delayed CSI  

E-Print Network (OSTI)

The sum degrees of freedom (DoF) of the two-user MIMO X-channel is characterized in the presence of output feedback and delayed channel state information (CSI). The number of antennas at each transmitters is assumed to be M and the number of antennas at each of the receivers is assumed to be N. It is shown that the sum DoF of the two-user MIMO X-channel is the same as the sum DoF of a two-user MIMO broadcast channel with 2M transmit antennas, and N antennas at each receiver. Hence, for this symmetric antenna configuration, there is no performance loss in the sum degrees of freedom due to the distributed nature of the transmitters. This result highlights the usefulness of feedback and delayed CSI for the MIMO X-channel. The K-user X-channel with single antenna at each transmitter and each receiver is also studied. In this network, each transmitter has a message intended for each receiver. For this network, it is shown that the sum DoF with partial output feedback alone is at least 2K/(K+1). This lower bound is...

Tandon, Ravi; Poor, H Vincent; Shamai, Shlomo

2012-01-01T23:59:59.000Z

479

Single step channeling in glass interior by femtosecond laser  

SciTech Connect

Channeling inside a transparent material, glass, by femtosecond laser was performed by using a single step process rather than hybrid processes that combine the laser irradiation with an additional tool or step to remove the material. Tightly focusing of a single femtosecond laser pulse using proper optical and laser processing parameters could induce the micro-explosion and could create voids inside transparent materials, and the effects of these parameters on the resultant feature geometry and channel length were studied. Understanding of the channel length variation at different locations from the specimen surface could enhance prediction capability. Taking into account of the laser, material, and lens properties, numerical models were developed to predict the absorption volume shape and size at different focusing depths below the surface of a specimen. These models will also be validated with the variation in feature and channel lengths inside the specimen obtained from the experiments. Spacing between adjacent laser pulses and laser parameters was varied to investigate effects of channel overlapping and its influence on long channel formation.