National Library of Energy BETA

Sample records for branch ing ratio

  1. Finding Space-Time Transformations for Uniform Recurrences via Branch-ing Parametric Linear Programming

    E-Print Network [OSTI]

    Gugat, Martin

    consisting of two linear mappings, an allocation and a timing function. In this paper, we address the problem allocation function, a continuous relaxation of this problem is studied by passing from linear to quasi of the null space of the allocation function. Therefore, a branching approach is proposed for finding quasi

  2. Improved Measurement of the ??e? Branching Ratio

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Aguilar-Arevalo, A.; Aoki, M.; Blecher, M.; Britton, D. I.; Bryman, D. A.; vom Bruch, D.; Chen, S.; Comfort, J.; Ding, M.; Doria, L.; et al

    2015-08-01

    A new measurement of the branching ratio Re/?=?(?+ ? e+? + ?+ ? e+??)/?(?+ ? ?+? + ?+??+??) resulted in Rexpe/?=[1.2344±0.0023(stat)±0.0019(syst)] x 10-4. This is in agreement with the standard model prediction and improves the test of electron-muon universality to the level of 0.1%.

  3. Measurements of $\\Xi_c^{+}$ Branching Ratios

    E-Print Network [OSTI]

    Link, J M; Anjos, J C; Bediaga, I; Göbel, C; Magnin, J; Massafferri, A; De Miranda, J M; Pepe, I M; Polycarpo, E; Dos Reis, A C; Carrillo, S; Casimiro, E; Cuautle, E; Sánchez-Hernández, A; Uribe, C; Vázquez, F; Agostino, L; Cinquini, L; Cumalat, J P; O'Reilly, B; Segoni, I; Wahl, M; Butler, J N; Cheung, H W K; Chiodini, G; Gaines, I; Garbincius, P H; Garren, L A; Gottschalk, E E; Kasper, P H; Kreymer, A E; Kutschke, R; Wang, M; Benussi, L; Bertani, M; Bianco, S; Fabbri, Franco Luigi; Zallo, A; Reyes, M; Cawlfield, C; Kim, D Y; Rahimi, A; Wiss, J; Gardner, R; Kryemadhi, A; Chung, Y S; Kang, J S; Ko, B R; Kwak, J W; Lee, K B; Cho, K; Park, H; Alimonti, G; Barberis, S; Boschini, M; Cerutti, A; D'Angelo, P; Di Corato, M; Dini, P; Edera, L; Erba, S; Giammarchi, M; Inzani, P; Leveraro, F; Malvezzi, S; Menasce, D; Mezzadri, M; Moroni, L; Pedrini, D; Pontoglio, C; Prelz, F; Rovere, M; Sala, S; Davenport, T F; Arena, V; Boca, G; Bonomi, G; Gianini, G; Liguori, G; Lopes-Pegna, D; Merlo, M M; Pantea, D; Ratti, S P; Riccardi, C; Vitulo, P; Hernández, H; López, A M; Luiggi, E; Méndez, H; Paris, A; Quinones, J; Ramírez, J E; Zhang, Y; Wilson, J R; Handler, T; Mitchell, R; Engh, D; Hosack, M; Johns, W E; Nehring, M S; Sheldon, P D; Stenson, K; Vaandering, E W; Webster, M; Sheaff, M

    2003-01-01

    Using data collected by the fixed target Fermilab experiment FOCUS, we measure the branching ratios of the Cabibbo favored decays $\\Xi_c^+ \\to \\Sigma^+K^-\\pi^+$, $\\Xi_c^+ \\to \\Sigma^+ \\bar{K}^{*}(892)^0$, and $\\Xi_c^+ \\to \\Lambda^0K^-\\pi^+\\pi^+$ relative to $\\Xi_c^+ \\to \\Xi^-\\pi^+\\pi^+$ to be $0.91\\pm0.11\\pm0.04$, $0.78\\pm0.16\\pm0.06$, and $0.28\\pm0.06\\pm0.06$, respectively. We report the first observation of the Cabibbo suppressed decay $\\Xi_c^+ \\to \\Sigma^+K^+K^-$ and we measure the branching ratio relative to $\\Xi_c^+ \\to \\Sigma^+K^-\\pi^+$ to be $0.16\\pm0.06\\pm0.01$. We also set 90% confidence level upper limits for $\\Xi_c^+ \\to \\Sigma^+ \\phi$ and $\\Xi_c^+ \\to \\Xi^*(1690)^0(\\Sigma^+ K^-) K^+$ relative to $\\Xi_c^+ \\to \\Sigma^+K^-\\pi^+$ to be 0.12 and 0.05, respectively. We find an indication of the decays $\\Xi_c^+ \\to \\Omega^-K^{+}\\pi^+$ and $\\Xi_c^+ \\to \\Sigma^{*}(1385)^+ \\bar{K}^0$ and set 90% confidence level upper limits for the branching ratios with respect to $\\Xi_c^+ \\to \\Xi^-\\pi^+\\pi^+$ to be 0.12 a...

  4. Cold versus hot fusion deuterium branching ratios

    SciTech Connect (OSTI)

    Fox, H.; Bass, R.

    1995-12-31

    A major source of misunderstanding of the nature of cold nuclear fusion has been the expectation that the deuterium branching ratios occurring within a palladium lattice would be consistent with the gas-plasma branching ratios. This misunderstanding has led to the concept of the dead graduate student, the 1989`s feverish but fruitless search for neutron emissions from cold fusion reactors, and the follow-on condemnation of the new science of cold fusion. The experimental facts are that in a properly loaded palladium lattice, the deuterium fusion produces neutrons at little above background, a greatly less-than-expected production of tritium (the tritium desert), and substantially more helium-4 than is observed in hot plasma physics. The experimental evidence is now compelling (800 reports of success from 30 countries) that cold nuclear fusion is a reality, that the branching ratios are unexpected, and that a new science is struggling to be recognized. Commercialization of some types of cold fusion devices has already begun.

  5. Electronic branching ratio of the ? lepton

    E-Print Network [OSTI]

    Ammar, Raymond G.; Baringer, Philip S.; Coppage, Don; Davis, Robin E. P.; Kelly, M.; Kwak, Nowhan; Lam, H.

    1992-06-01

    - duction processes. In addition, it also contained events due to beam interactions with residual gas in the beam pipe ("beam-gas" events). We studied these backgrounds using Monte Carlo techniques and, whenever possible, the data themselves. In the Monte... that the angle between the net momentum of the event and the beam axis, 0„,„„ satisfied ~cos8,„,„,~ (0.80 for events where P~ was less than 0.5 (GeV/c) . Monte Carlo studies indicated that these cuts retained approximately 90% of r pairs satisfy- ing all other...

  6. Branching ratios for the beta decay of Na-21 

    E-Print Network [OSTI]

    Iacob, V. E.; Hardy, John C.; Gagliardi, Carl A.; Goodwin, J.; Nica, N.; Park, H. I.; Tabacaru, G.; Trache, L.; Tribble, Robert E.; Zhai, Y.; Towner, I. S.

    2006-01-01

    We have measured the beta-decay branching ratio for the transition from Na-21 to the first excited state of Ne-21. A recently published test of the standard model, which was based on a measurement of the beta-nu correlation ...

  7. BRIDGE: Branching Ratio Inquiry/Decay Generated Events

    E-Print Network [OSTI]

    Patrick Meade; Matthew Reece

    2007-10-24

    We present the manual for the program BRIDGE: Branching Ratio Inquiry/Decay Generated Events. The program is designed to operate with arbitrary models defined within matrix element generators, so that one can simulate events with small final-state multiplicities, decay them with BRIDGE, and then pass them to showering and hadronization programs. BRI can automatically calculate widths of two and three body decays. DGE can decay unstable particles in any Les Houches formatted event file. DGE is useful for the generation of event files with long decay chains, replacing large matrix elements by small matrix elements followed by sequences of decays. BRIDGE is currently designed to work with the MadGraph/MadEvent programs for implementing and simulating new physics models. In particular, it can operate with the MadGraph implementation of the MSSM. In this manual we describe how to use BRIDGE, and present a number of sample results to demonstrate its accuracy.

  8. Determination of the deuterium-tritium branching ratio based on inertial confinement fusion implosions

    E-Print Network [OSTI]

    Rosenberg, Michael Jonathan

    The deuterium-tritium (D-T) ?-to-neutron branching ratio [[superscript 3]H(d,?)[superscript 5]He/[superscript 3]H(d,n)[superscript 4]He] was determined under inertial confinement fusion (ICF) conditions, where the ...

  9. Branching ratio measurements of the 7.12-MeV state in 16O

    E-Print Network [OSTI]

    C. Matei; C. R. Brune

    2004-10-25

    Knowledge of the gamma-ray branching ratios of the 7.12-MeV state of 16O is important for the extrapolation of the 12C(a,g)16O cross section to astrophysical energies. Ground state transitions provide most of the 12C(a,g)16O total cross section while cascade transitions have contributions of the order of 10-20%. Determining the 7.12-MeV branching ratio will result in a better extrapolation of the cascade and E2 ground state cross section to low energies. We report here on measurements on the branching ratio of the 7.12-MeV level in 16O.

  10. D-T gamma-to-neutron branching ratio determined from inertial confinement fusion plasmas

    E-Print Network [OSTI]

    D-T gamma-to-neutron branching ratio determined from inertial confinement fusion plasmas Y. Kim, J. M. Mack, H. W. Herrmann, C. S. Young, G. M. Hale et al. Citation: Phys. Plasmas 19, 056313 (2012 in ignition-scale implosions on the NIF Phys. Plasmas 19, 056307 (2012) Experimental and theoretical

  11. Measurement of the ratio of the production cross sections times branching fractions of B [superscript ±][subscript c] ? [J over ?? [superscript ±

    E-Print Network [OSTI]

    Apyan, Aram

    The ratio of the production cross sections times branching fractions (?(B[superscript ± [subscript c])B(B[superscript ±] [subscript c]?J[over ?? [superscript ±

  12. New, high statistics measurement of the K+ -> pi0 e+ nu (Ke3) branching ratio

    E-Print Network [OSTI]

    Sher, A E; Atoyan, G S; Bassalleck, B; Bergman, D R; Cheung, N; Dhawan, S; Do, H; Egger, J; Eilerts, S W; Fischer, H; Herold, W D; Issakov, V V; Kaspar, H; Kraus, D E; Lazarus, D M; Lichard, P; Lowe, J; Lozano-Bahilo, J; Ma, H; Majid, W A; Pislak, S; Poblaguev, A A; Rehak, P; Sher, A E; Thompson, J A; Truöl, P; Zeller, M E; Sher, Aleksey

    2003-01-01

    E865 at the Brookhaven National Laboratory AGS collected about 70,000 K+(e3) events with the purpose of measuring the relative K+(e3) branching ratio. The pi0 in all the decays was detected using the e+e- pair from pi0 -> e+e-gamma decay and no photons were required. Using the Particle Data Group branching ratios for the normalization decays we obtain BR(K+(e3(gamma))=(5.13+/-0.02(stat)+/-0.09(sys)+/-0.04(norm))%, where $K+(e3(gamma)) includes the effect of virtual and real photons. This result is 2.3 sigma higher than the current Particle Data Group value. The implications of this result for the $V_{us}$ element of the CKM matrix, and the matrix's unitarity are discussed.

  13. Flavor changing kaon decays from hypercp: Measurements of the K+ ---> pi+- mu+ mu- branching ratios

    SciTech Connect (OSTI)

    E. Craig Dukes et al.

    2004-01-12

    The Fermilab HyperCP collaboration is making precision studies of charged hyperon and kaon decays, as well as searches for rare and forbidden hyperon and kaon decays. We report here on measurements of the branching ratios of the flavor-changing neutral-current decays: K{sup {+-}} {yields} {pi}{sup {+-}} {mu}{sup +} {mu}{sup -}, and compare our results to theoretical predictions. This is the first observation of the K{sup -} {yields} {pi}{sup -} {mu}{sup +} {mu}{sup -} decay.

  14. Branching ratios from B{sub s} and {Lambda}{sub b}{sup 0}

    SciTech Connect (OSTI)

    Matthew S. Martin

    2004-05-28

    CDF Run II relative branching ratio measurements for 65 pb{sup -1} of data in the channels B{sub s} {yields} D{sub s}{sup {-+}}{pi}{sup {-+}}, {Lambda} {sub b}{sup 0} {yields} {Lambda}{sub c}{sup {+-}}{pi}{sup {-+}} and B {yields} h{sup +}h{sup -} are presented. Further, an observation of B{sub s} {yields} K{sup {+-}} K{sup {-+}} and a measurement of A{sub CP} are presented.

  15. Branching ratios and direct CP asymmetries in $D\\to PV$ decays

    E-Print Network [OSTI]

    Li, Hsiang-nan; Qin, Qin; Yu, Fu-Sheng

    2013-01-01

    We study the two-body hadronic $D\\to PV$ decays, where $P$ ($V$) denotes a pseudoscalar (vector) meson, in the factorization-assisted topological-amplitude approach proposed in our previous work. This approach is based on the factorization of short-distance and long-distance dynamics into Wilson coefficients and hadronic matrix elements of four-fermion operators, respectively, with the latter being parameterized in terms of several nonperturbative quantities. We further take into account the $\\rho$-$\\omega$ mixing effect, which improves the global fit to the branching ratios involving the $\\rho^0$ and $\\omega$ mesons. Combining short-distance dynamics associated with penguin operators and the hadronic parameters determined from the global fit to branching ratios, we predict direct CP asymmetries. In particular, the direct CP asymmetries in the $D^0\\to K^0\\bar{K}^{*0}, \\bar{K}^0K^{*0}$, $D^+\\to\\pi^+\\rho^0$ and $D_s^+\\to K^+\\omega, K^+\\phi$ decays are found to be of ${\\cal O}(10^{-3})$, which can be observed at...

  16. Measurement of the Branching Ratio Lambda_c+ -> p pi+ pi-

    SciTech Connect (OSTI)

    Lopez-Hinojosa, Guillermo; /San Luis Potosi U.

    2008-03-01

    The confirmation of the Cabibbo-suppressed charm baryon decay mode {Lambda}{sub c}{sup +} {yields} p{pi}{sup +}{pi}{sup -} is reported. All data analyzed are from SELEX, a fixed target experiment at Fermilab that took data during 1996 and 1997, mainly with a 600 GeV/c {Sigma}{sup -} beam. The branching ratio of the Cabibbo-suppressed decay mode {Lambda}{sub c}{sup +} {yields} p{pi}{sup +}{pi}{sup -} relative to the Cabibbo-favored mode {Lambda}{sub c}{sup +} {yields} pK{sup -}{pi}{sup +} is measured to be: {Gamma}({Lambda}{sub c}{sup +} {yields} p{pi}{sup +}{pi}{sup -})/{Gamma}({Lambda}{sub c}{sup +} {yields} pK{sup -}{pi}{sup +}) = 0.103 {+-} 0.022.

  17. Status of the measurement of K S -> ?e? branching ratio and lepton charge asymmetry with the KLOE detector

    E-Print Network [OSTI]

    D. Kami?ska on behalf of the KLOE-2 collaboration

    2015-07-03

    We present the current status of the analysis of about 1.7 billion K_S K_L pair events collected at DA{\\Phi}NE with the KLOE detector to determine the branching ratio of K_S -> {\\pi}e{\

  18. Vibrational state-dependent predissociation dynamics of ClO (A 2 Insight from correlated fine structure branching ratios

    E-Print Network [OSTI]

    North, Simon W.

    branching ratios and spatial anisotropy of each dissociation channel permitted the extraction of relative) products,15 is crossed by 17 electronic states correlating to Cl(2 PJ) þ O(3 PJ) products. Several theoretical studies have attempted to elucidate the nature of the predissociation mechanism, i.e. determining

  19. Measurement of $B_s^0 \\to D_s^{(*)+} D_s^{(*)-}$ Branching Ratios

    SciTech Connect (OSTI)

    Aaltonen, T.; Alvarez Gonzalez, B.; Amerio, S.; Amidei, D.; Anastassov, A.; Annovi, A.; Antos, J.; Apollinari, G.; Appel, J.A.; Arisawa, T.; Artikov, A.; /Dubna, JINR /Texas A-M

    2012-04-01

    The decays B{sub s}{sup 0} {yields} D{sub s}{sup (*)+}D{sub s}{sup (*)-}s are reconstructed in a data sample corresponding to an integrated luminosity of 6.8 fb{sup -1} collected by the CDF II detector at the Tevatron p{bar p} collider. All decay modes are observed with a significance of more than 10 {sigma}, and we measure the B{sub s}{sup 0} production rate times B{sub s}{sup 0} {yields} D{sub s}{sup (*)+} D{sub s}{sup (*)-} branching ratios relative to the normalization mode B{sup 0} {yields} D{sub s}{sup +}d{sup -} to be 0.183 {+-} 0.021 {+-} 0.017 for B{sub s}{sup 0} {yields} D{sub s}{sup +}D{sub s}{sup -}, 0.424 {+-} 0.046 {+-} 0.035 for B{sub s}{sup 0} {yields} D{sub s}{sup {+-}} D{sub s}{sup {-+}}, 0.654 {+-} 0.072 {+-} 0.065 for B{sub s}{sup 0} {yields} D{sub s}{sup *+} D{sub s}{sup *-}, and 1.261 {+-} 0.095 {+-} 0.112 for the inclusive decay B{sub s}{sup 0} {yields} D{sub s}{sup (*)+}D{sub s}{sup (*)-}, where the uncertainties are statistical and systematic. These results are the most precise single measurements to date and provide important constraints for indirect searches for non-standard model physics in B{sub s}{sup 0} mixing.

  20. A Single Transition State Serves Two Mechanisms. The Branching Ratio for CH2O-+ CH3Cl on Improved Potential Energy Surfaces

    E-Print Network [OSTI]

    Schlegel, H. Bernhard

    for this reaction has been studied by ab initio molecular dynamics (AIMD). The energies of transition states change of the potential energy surface around the transition state may vary the branching ratioA Single Transition State Serves Two Mechanisms. The Branching Ratio for CH2O·- + CH3Cl on Improved

  1. The Effects of Fourth Generation on the Total Branching Ratio and the Lepton Polarization in $?_b \\rar ?\\ell^+ \\ell^-$ decay

    E-Print Network [OSTI]

    V. Bashiry; K. Azizi

    2007-07-09

    This study investigates the influence of the fourth generation quarks on the total branching ratio and the single lepton polarizations in \\Lambda_b --> \\Lambda \\ell^+ \\ell^- decay. Taking $|V_{t's}V_{t'b}| {0.01-0.03} with phase just below $90^\\circ$, which is consistent with the b\\to s\\ell^+\\ell^- rate and the B_s mixing parameter \\Delta m_{B_s}, we obtain that the total branching ratio and the single lepton(\\mu, \\tau) polarizations are quite sensitive to the existence of fourth generation. It can serve as a good tool to search for new physics effects, precisely, to search for the fourth generation quarks(t', b').

  2. A Measurement of the holographic minimum observable beam branching ratio in the Fermilab 15-foot bubble chamber

    SciTech Connect (OSTI)

    Aderholz, M.; Aggarwal, M.M.; Akbari, H.; Allport, P.P.; Badyal, S.K.; Ballagh, H.C.; Barth, M.; Baton, J.P.; Bingham, H.H.; Bjelkhagen, H.; Brucker, E.B.; Burnstein,; Campbell, J.R.; Cence, R.J.; Chatterjee, T.K.; Clayton, E.F.; Corrigan, G.; Coutures, C.; DeProspo, D.; Devanand,; De Wolf, E.A.; /UC, Berkeley /Birmingham U. /Brussels U.,

    1997-01-01

    Holography has been used successfully in combination with conventional optics for the first time in a large cryogenic bubble chamber, the 15-Foot Bubble Chamber at Fermilab, during a physics run. The innovative system combined the reference beam with the object beam, illuminating a conical volume of {approx} 1.4 m{sup 3}. Bubble tracks from neutrino interactions with a width of {approx} 120 {micro}m have been recorded with good contrast. The ratio of intensities of the object light to the reference light striking the film is called the Beam Branching Ratio. We obtained in our experiment an exceedingly small minimum-observable ratio of (0.54 {+-} 0.21) x 10{sup -7}. The technology has the potential for a wide range of applications.

  3. Measurement of Branching Ratios for Non-leptonic Cabibbo-suppressed Decays of the Charmed-Strange Baryon Xic+

    SciTech Connect (OSTI)

    Vazquez Jauregui, Eric; /San Luis Potosi U.

    2008-08-01

    We studied several {Xi}{sub c}{sup +} decay modes, most of them with a hyperon in the final state, and determined their branching ratios. The data used in this analysis come from the fixed target experiment SELEX, a multi-stage spectrometer with high acceptance for forward interactions, that took data during 1996 and 1997 at Fermilab with 600 GeV=c (mainly {Sigma}{sup -}, {pi}{sup -}) and 540 GeV/c (mainly p) beams incident on copper and carbon targets. The thesis mainly details the first observation of two Cabibbo-suppressed decay modes, {Xi}{sub c}{sup +} {yields} {Sigma}{sup +}{pi}{sup -}{pi}{sup +} and {Xi}{sub c}{sup +} {yields} {Sigma}{sup -}{pi}{sup +}{pi}{sup +}. The branching ratios of the decays relative to the Cabibbo-favored {Xi}{sub c}{sup +} {yields} {Xi}{sup -}{pi}{sup +}{pi}{sup +} are measured to be: {Lambda}({Xi}{sub c}{sup +} {yields} {Sigma}{sup -}{pi}{sup +}{pi}{sup +})/{Lambda}({Xi}{sub c}{sup +} {yields} {Xi}{sup -}{pi}{sup +}{pi}{sup +}) = 0.184 {+-} 0.086. Systematic studies have been performed in order to check the stability of the measurements varying all cuts used in the selection of events over a wide interval and we do not observe evidence of any trend, so the systematic error is negligible in the final results because the quadrature sum of the total error is not affected. The branching ratios for the same decay modes of the {Lambda}{sub c}{sup +} are measured to check the methodology of the analysis. The branching ratio of the decay mode {Lambda}{sub c}{sup +} {yields} {Sigma}{sup +}{pi}{sup -}{pi}{sup +} is measured relative to {Lambda}{sub c}{sup +} {yields} pK{sup -} {pi}{sup +}, while the one of the decay mode {Lambda}{sub c}{sup +} {yields} {Sigma}{sup -}{pi}{sup +}{pi}{sup +} is relative to {Lambda}{sub c}{sup +} {yields} {Sigma}{sup +}{pi}{sup -}{pi}{sup +}, as they have been reported earlier. The results for the control modes are: {Gamma}({Lambda}{sub c}{sup +} {yields} {Sigma}{sup +}{pi}{sup -}{pi}{sup +})/{Gamma}({Lambda}{sub c}{sup +} {yields} pK{sup -} {pi}{sup +}) = 0.716 {+-} 0.144 and {Gamma}({Lambda}{sub c}{sup +} {yields} {Sigma}{sup -}{pi}{sup +}{pi}{sup +})/{Gamma}({Lambda}{sub c}{sup +} {yields} {Sigma}{sup +}{pi}{sup -}{pi}{sup +}) = 0.382 {+-} 0.104. The branching ratio of the decay mode {Xi}{sub c}{sup +} {yields} pK{sup -} {pi}{sup +} relative to {Xi}{sub c}{sup +} {yields} {Xi}{sup -}{pi}{sup +}{pi}{sup +} is considered as another control mode, the measured value is {Gamma}({Xi}{sub c}{sup +} {yields} pK{sup -}{pi}{sup +})/{Gamma}({Xi}{sub c}{sup +} {yields} {Xi}{sup -}{pi}{sup +}{pi}{sup +}) = 0.194 {+-} 0.054. Systematic studies have been also performed for the control modes and all systematic variations are also small compared to the statistical error. We also report the first observation of two more decay modes, the Cabibbo-suppressed decay {Xi}{sub c}{sup +} {yields} {Xi}{sup -} K{sup +}{pi}{sup +} and the doubly Cabibbo-suppressed decay {Xi}{sub c}{sup +} {yields} {Sigma}{sup +}K{sup +}{pi}{sup -}, but their branching ratios have not been measured up to now.

  4. Myosin V passing over Arp2/3 junctions: branching ratio calculated from the elastic lever arm model

    E-Print Network [OSTI]

    Andrej Vilfan

    2007-12-14

    Myosin V is a two-headed processive motor protein that walks in a hand-over-hand fashion along actin filaments. When it encounters a filament branch, formed by the Arp2/3 complex, it can either stay on the straight mother filament, or switch to the daughter filament. We study both probabilities using the elastic lever arm model for myosin V. We calculate the shapes and bending energies of all relevant configurations in which the trail head is bound to the actin filament before Arp2/3 and the lead head is bound either to the mother or to the daughter filament. Based on the assumption that the probability for a head to bind to a certain actin subunit is proportional to the Boltzmann factor obtained from the elastic energy, we calculate the mother/daughter filament branching ratio. Our model predicts a value of 27% for the daughter and 73% for the mother filament. This result is in good agreement with recent experimental data.

  5. Kitty Inglis Jane Harvell

    E-Print Network [OSTI]

    Sussex, University of

    Kitty Inglis Librarian Jane Harvell Head of Library Content Delivery & Digital Strategy (ActingFT, 2PT) Eleanor Craig Digital Content Librarian G7 Library Assistant Systems G3 Library Assistants G) Sally Faith Head of Library Planning & Administration Joanna Ball Head of Library Academic Services

  6. Probing with Penguins: A lattice calculation of the branching ratio for some of the exclusive modes of $b \\to s ?$

    E-Print Network [OSTI]

    K. C. Bowler

    1995-02-14

    We calculate the leading-order matrix element for exclusive decays of $b \\to s\\gamma$ in the quenched approximation of lattice QCD on a $24^3\\times48$ lattice at $\\beta=6.2$, using an O(a)-improved fermion action. The matrix element is used to extract the on-shell form factor $T_1(q^2=0)$ for $B \\to K^*\\gamma$ and $B_s \\to \\phi\\gamma$, using two different assumptions about the $q^2$ dependence of the form factors for these decays. For $B \\to K^*\\gamma$, $T_1(q^2=0)$ is determined to be $0.159^{+34}_{-33}\\pm 0.067$ or $0.124^{+20}_{-18} \\pm 0.022$ in the two cases. We find the results to be consistent (in the Standard Model) with the CLEO experimental branching ratio of $BR(B\\to K^*\\gamma) = (4.5 \\pm 1.5 \\pm 0.9) \\times 10^{-5}$.

  7. Measurement of the Branching fraction ratio B ---> D K / B ---> D pi with the CDF II detector

    SciTech Connect (OSTI)

    Squillacioti, Paola; /INFN, Pisa /Siena U.

    2006-11-01

    In this thesis the author has described the first measurement performed at a hadron collider of the branching fraction of the Cabibbo-suppressed mode B{sup +} {yields} {bar D}{sup 0} K{sup +}. The analysis has been performed with 360 pb{sup -1} of data collected by the CDF II detector.

  8. First Observation of the Cabibbo-suppressed Decays Xi+(c) ---> Sigma+ pi- pi+ and Xi+(c) ---> Sigma- pi+ pi+ and Measurement of their Branching Ratios

    SciTech Connect (OSTI)

    Vazquez-Jauregui, E.; Engelfried, J.; Akgun, U.; Alkhazov, Georgiy; Amaro-Reyes, J.; Atamantchouk, A.G.; Ayan, Ahmet Sedat; Balatz, M.Y.; Blanco-Covarrubias, A.; Bondar, N.F.; Cooper, Peter S.; /Fermilab /Michigan U., Flint

    2008-04-01

    The authors report the first observation of two Cabibbo-suppressed decay modes, {Xi}{sub c}{sup +} {yields} {Sigma}{sup +}{pi}{sup -}{pi}{sup +} and {Xi}{sub c}{sup +} {yields} {Sigma}{sup -} {pi}{sup +}{pi}{sup +}. They observe 56 {+-} 13 over a background of 21, and 23 {+-} 7 over a background of 12 events, respectively, for the signals. The data were accumulated using the SELEX spectrometer during the 1996-1997 fixed target run at Fermilab, chiefly from a 600 GeV/c {Sigma}{sup -} beam. The branching ratios of the decays relative to the Cabibbo-favored {Xi}{sub c}{sup +} {yields} {Xi}{sup -}{pi}{sup +}{pi}{sup +} are measured to be B({Xi}{sub c}{sup +} {yields} {Sigma}{sup +}{pi}{sup -}{pi}{sup +})/B({xi}{sub c}{sup +} {yields} {Xi}{sup -} {pi}{sup +}{pi}{sup +}) = 0.50 {+-} 0.20, and B({Xi}{sub c}{sup +} {yields} {Sigma}{sup -}{pi}{sup +}{pi}{sup +})/B({Xi}{sub c}{sup +} {yields} {Xi}{sup -}{pi}{sup +}{pi}{sup +}) = 0.23 {+-} 0.11, respectively. They also report branching ratios for the same decay modes of the {Lambda}{sub c}{sup +} relative to {Lambda}{sub c}{sup +} {yields} pK{sup -}{pi}{sup +}.

  9. X-ray resonant magnetic scattering and x-ray magnetic circular dichroism branching ratios, L[subscript 3] / L[subscript 2], for heavy rare earths

    SciTech Connect (OSTI)

    Lee, Yongbin; Kim, Jong-Woo; Goldman, Alan I.; Harmon, Bruce N. (Iowa State)

    2010-07-19

    In this study we have used first principles electronic structure methods to investigate the detailed contributions to the L{sub 3}/L{sub 2} branching ratio in the heavy rare earth elements. The calculations use the full potential, relativistic, linear augmented plane wave method with the LSDA+U approach for consideration of the local 4f electronic orbitals. With no spin orbit coupling (SOC) in the conducting bands, and with the same radial function for the 2p{sub 3/2} and 2p{sub 1/2} core states, the branching ratio (BR) is exactly 1:-1 for the x-ray magnetic circular dichroism spectra of the ferromagnetic heavy rare earth metals. However, with full SOC the BR ranges from 1.5 to 6.0 in going from Gd to Er. The energy and spin dependence of the 5d radial functions are important. The results point to problems with modified atomic models which have been proposed to explain the BR. Recent x-ray resonant magentic scattering experiments on (Gd,Tb,Dy,Ho,Er,Tm)Ni{sub 2}Ge{sub 2} are discussed.

  10. Measurement of the ratio of branching fractions B(D(0)??-e+?e)/B(D(0)?K-e+?e)

    E-Print Network [OSTI]

    Baringer, Philip S.

    1995-09-01

    PHYSICAL REViEW D VOLUME 52, NUMBER 5 1 SEPTEMBER 1995 Measurement of the ratio of branching fractions H(D; 7r e+u, )/H(D0; R e+u, ) F. Butler, X. Fu, B. Nemati, W.R. Ross, P. Skubic, M. Wood, M. Bishai, 3. Fast, E. Gerndt, J.W. Hinson, R.L. Mc...Ilwain, T. Miao, D.H. Miller, M. Modesitt, D. Payne, E.I. Shibata, I.P.J. Shipsey, P.N. Wang, 2 L. Gibbons, Y. Kwon, S. Roberts, E.H. Thorndike, T.E. Coan, J. Dominick, V. Fadeyev, I. Korolkov, M. Lambrecht, S. Sanghera, V. Shelkov, T. Skwarnicki, R...

  11. Routine EH& ing and labo

    E-Print Network [OSTI]

    Johnson, Eric E.

    for fication or m atory decom ing of a large contaminati from capita ordinary eme d to, acts of uality analyse sal cost for r ion producin iners unsuita ylinders with k sensitive ch ury oxides ­ es and ashes n cost unlabeled or s EH&S pers e time osal that resu odel, renova spill clean-u ion, sabotag al

  12. Measurement of the ratio of branching fractions B(D0 ---> K+ pi-) / B(D0 ---> K- pi+) using the CDF II Detector

    SciTech Connect (OSTI)

    Abulencia, A.; Acosta, D.; Adelman, Jahred A.; Affolder, T.; Akimoto, T.; Albrow, M.G.; Ambrose, D.; Amerio, S.; Amidei, D.; Anastassov, A.; Anikeev, K.; /Taiwan, Inst.

    2006-05-01

    The authors present a measurement of R{sub B}, the ratio of the branching fraction for the rare decay D{sup 0} {yields} K{sup +}{pi}{sup -} to that for the Cabibbo-favored decay D{sup 0} {yields} K{sup -}{pi}{sup +}. Charge conjugate decays are implicitly included. A signal of 2005 {+-} 104 events for the decay D{sup 0} {yields} K{sup +}{pi}{sup -} is obtained using the CDF II detector at the Fermilab Tevatron collider. The data set corresponds to an integrated luminosity of 0.35 fb{sup -1} produced in {bar p}p collisions at {radical}s = 1.96 TeV. Assuming no mixing, they find R{sub B} = [4.05 {+-} 0.21(stat) {+-} 0.11(syst)] x 10{sup -3}. This measurement is consistent with the world average, and comparable in accuracy with the best measurements from other experiments.

  13. Measurements of branching fraction ratios and CP-asymmetries in suppressed B-? D(? K+?-)K- and B-? D(? K+?-)?- decays

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Aaltonen, T.

    2011-08-01

    We report the first reconstruction in hadron collisions of the suppressed decays B-? D(? K+?-)K- and B-? D(? K+?-)?- decays, sensitive to the CKM phase {gamma}, using data from 7 fb-1 of integrated luminosity collected by the CDF II detector at the Tevatron collider. We reconstruct a signal for the B-? D(? K+?-)K- suppressed mode with a significance of 3.2 standard deviations, and measure the ratios of the suppressed to favored branching fractions R(K) = [22.0 ± 8.6(stat) ± 2.6(syst)] x 10-3, R+(K) = [42.6 ± 13.7(stat) ± 2.8(syst)] x 10-3, R-(K) = [3.8 ± 10.3(stat) ± 2.7(syst)] x 10-3more »as well as the direct CP-violating asymmetry A(K) = -0.82±0.44(stat)±0.09(syst) of this mode. Corresponding quantities for B- ? D(? K+?-)?- decay are also reported.« less

  14. Measurements of branching fraction ratios and CP-asymmetries in suppressed B-? D(? K+?-)K- and B-? D(? K+?-)?- decays

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

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

    2011-08-01

    We report the first reconstruction in hadron collisions of the suppressed decays B-? D(? K+?-)K- and B-? D(? K+?-)?- decays, sensitive to the CKM phase {gamma}, using data from 7 fb-1 of integrated luminosity collected by the CDF II detector at the Tevatron collider. We reconstruct a signal for the B-? D(? K+?-)K- suppressed mode with a significance of 3.2 standard deviations, and measure the ratios of the suppressed to favored branching fractions R(K) = [22.0 ± 8.6(stat) ± 2.6(syst)] x 10-3, R+(K) = [42.6 ± 13.7(stat) ± 2.8(syst)] x 10-3, R-(K) = [3.8 ± 10.3(stat) ± 2.7(syst)] x 10-3 as well as the direct CP-violating asymmetry A(K) = -0.82±0.44(stat)±0.09(syst) of this mode. Corresponding quantities for B- ? D(? K+?-)?- decay are also reported.

  15. High precision branching ratio measurement for the superallowed beta decay of Rb-74: A prerequisite for exacting tests of the standard model 

    E-Print Network [OSTI]

    Piechaczek, A.; Zganjar, EF; Ball, GC; Bricault, P.; D'Auria, JM; Hardy, John C.; Hodgson, DF; Iacob, V.; Klages, P.; Kulp, WD; Leslie, JR; Lipoglavsek, M.; Macdonald, JA; Mak, HB; Moltz, D. M.; Savard, G.; von Schwarzenberg, J.; Svensson, CE; Towner, IS; Wood, JL.

    2003-01-01

    Nonanalog Fermi and Gamow-Teller branches in the superallowed beta decay of Rb-74 have been investigated using gamma-ray and conversion-electron spectroscopy. Nine observed transitions, in conjunction with a recent shell model calculation, determine...

  16. Ab Initio/RRKM Study of the Potential Energy Surface of Triplet Ethylene and Product Branching Ratios of the C(3P) + CH4 Reaction

    E-Print Network [OSTI]

    Nguyen, Minh Tho

    Ab Initio/RRKM Study of the Potential Energy Surface of Triplet Ethylene and Product Branching originating from the collision energy (12.2 kcal/mol), the sole reaction products are C2H3 + H, where 90 potential energy surface for the C(3P) + CH4 reaction have been performed using the CCSD(T)/6-311+G(3df,2p

  17. Measurement of the ratio of the production cross sections times branching fractions of Bc± ? J/??±and B± ? J/? K± and B(Bc±? J/? ?±?±?-/+)/B(Bc± ? J/? ?±) in pp collisions at ?s = 7 TeV

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Khachatryan, V.

    2015-01-13

    The ratio of the production cross sections times branching fractions (?(Bc±) B(Bc± ? J/??±))/(?(B±) B(B± ? J/?K±) is studied in proton-proton collisions at a center-of-mass energy of 7 TeV with the CMS detector at the LHC. The kinematic region investigated requires Ba,sub>c± and B±mesons with transverse momentum p? > 15 GeV and rapidity |y| -1. The ratio is determined to be [0.48 ± 0.05 (stat) ± 0.03(syst) ± 0.05 (?Bc)]% The J/??±?±?-/+ decay mode is also observed in the same data sample. Using a model-independent method developed tomore »measure the efficiency given the presence of resonant behaviour in the three-pion system, the ratio of the branching fractions J/? ?±?±?-/+)/B(Bc± is measured to be 2.55 ± 0.80(stat) ± 0.33(syst) +0.04-0.01 (?Bc), consistent with the previous LHCb result.« less

  18. Measurement of the ratio of the production cross sections times branching fractions of Bc± ? J/??±and B± ? J/? K± and B(Bc±? J/? ?±?±?-/+)/B(Bc± ? J/? ?±) in pp collisions at ?s = 7 TeV

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Khachatryan, V. [Yerevan Physics Institute (Armenia)

    2015-01-01

    The ratio of the production cross sections times branching fractions (?(Bc±) B(Bc± ? J/??±))/(?(B±) B(B± ? J/?K±) is studied in proton-proton collisions at a center-of-mass energy of 7 TeV with the CMS detector at the LHC. The kinematic region investigated requires Ba,sub>c± and B±mesons with transverse momentum p? > 15 GeV and rapidity |y| -1. The ratio is determined to be [0.48 ± 0.05 (stat) ± 0.03(syst) ± 0.05 (?Bc)]% The J/??±?±?-/+ decay mode is also observed in the same data sample. Using a model-independent method developed to measure the efficiency given the presence of resonant behaviour in the three-pion system, the ratio of the branching fractions J/? ?±?±?-/+)/B(Bc± is measured to be 2.55 ± 0.80(stat) ± 0.33(syst) +0.04-0.01 (?Bc), consistent with the previous LHCb result.

  19. Measurement of branching ratio and B0s lifetime in the decay B0s ? J/? f0(980) at CDF

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Aaltonen, T.

    2011-09-30

    We present a study of Bs0 decays to the CP-odd final state J/? f0(980) with J/? ? µ+µ- and f0(980) ? ?+?-. Using pp? collision data with an integrated luminosity of 3.8 fb-1 collected by the CDF II detector at the Tevatron we measure a Bs0 lifetime of ?(B0s ? J/? f0(980)) = 1.70-0.11+0.12(stat) ± 0.03(syst) ps. This is the first measurement of the Bs0} lifetime in a decay to a CP eigenstate and corresponds in the standard model to the lifetime of the heavy Bs0 eigenstate. We also measure the product of branching fractions of B0s ? J/? f0(980)more »and f0(980) ? ?+?- relative to the product of branching fractions of B0s ? J/?? and ??K+K- to be Rf0/? = 0.257 ± 0.020(stat) ± 0.014(syst), which is the most precise determination of this quantity to date.« less

  20. Interdiction Branching

    E-Print Network [OSTI]

    2011-09-29

    Sep 29, 2011 ... of partitioning the search space, referred to as the branching scheme. .... standard branch-and-bound both in terms of size of the enumeration tree and ...... of the fractional variable to be selected to enter at each iteration of the.

  1. Theoryand Applications Perta in ing to

    E-Print Network [OSTI]

    Simons, Jack

    Part 3 Theoryand Applications Perta in ing to Photochemical Processes Chapters 1-4 treated thermal-state potentlal energy surfaces that play cruclal roles In rate-cletermlnlng processes because the slaw rate mostphotochemlcal processes. Thepurpose ot thlsrevlew Is to tocus attentlon on those aspects ot partlcular exclted

  2. Measurement of the branching ratio $\\Gamma(\\Lambda_b^0 \\rightarrow \\psi(2S)\\Lambda^0)/\\Gamma(\\Lambda_b^0 \\rightarrow J/\\psi\\Lambda^0)$ with the ATLAS detector

    E-Print Network [OSTI]

    Aad, Georges; Abdallah, Jalal; Abdinov, Ovsat; Aben, Rosemarie; Abolins, Maris; AbouZeid, Ossama; Abramowicz, Halina; Abreu, Henso; Abreu, Ricardo; Abulaiti, Yiming; Acharya, Bobby Samir; Adamczyk, Leszek; Adams, David; Adelman, Jahred; Adomeit, Stefanie; Adye, Tim; Affolder, Tony; Agatonovic-Jovin, Tatjana; Agricola, Johannes; Aguilar-Saavedra, Juan Antonio; Ahlen, Steven; Ahmadov, Faig; Aielli, Giulio; Akerstedt, Henrik; Åkesson, Torsten Paul Ake; Akimov, Andrei; Alberghi, Gian Luigi; Albert, Justin; Albrand, Solveig; Alconada Verzini, Maria Josefina; Aleksa, Martin; Aleksandrov, Igor; Alexa, Calin; Alexander, Gideon; Alexopoulos, Theodoros; Alhroob, Muhammad; Alimonti, Gianluca; Alio, Lion; Alison, John; Alkire, Steven Patrick; Allbrooke, Benedict; Allport, Phillip; Aloisio, Alberto; Alonso, Alejandro; Alonso, Francisco; Alpigiani, Cristiano; Altheimer, Andrew David; Alvarez Gonzalez, Barbara; ?lvarez Piqueras, Damián; Alviggi, Mariagrazia; Amadio, Brian Thomas; Amako, Katsuya; Amaral Coutinho, Yara; Amelung, Christoph; Amidei, Dante; Amor Dos Santos, Susana Patricia; Amorim, Antonio; Amoroso, Simone; Amram, Nir; Amundsen, Glenn; Anastopoulos, Christos; Ancu, Lucian Stefan; Andari, Nansi; Andeen, Timothy; Anders, Christoph Falk; Anders, Gabriel; Anders, John Kenneth; Anderson, Kelby; Andreazza, Attilio; Andrei, George Victor; Angelidakis, Stylianos; Angelozzi, Ivan; Anger, Philipp; Angerami, Aaron; Anghinolfi, Francis; Anisenkov, Alexey; Anjos, Nuno; Annovi, Alberto; Antonelli, Mario; Antonov, Alexey; Antos, Jaroslav; Anulli, Fabio; Aoki, Masato; Aperio Bella, Ludovica; Arabidze, Giorgi; Arai, Yasuo; Araque, Juan Pedro; Arce, Ayana; Arduh, Francisco Anuar; Arguin, Jean-Francois; Argyropoulos, Spyridon; Arik, Metin; Armbruster, Aaron James; Arnaez, Olivier; Arnal, Vanessa; Arnold, Hannah; Arratia, Miguel; Arslan, Ozan; Artamonov, Andrei; Artoni, Giacomo; Asai, Shoji; Asbah, Nedaa; Ashkenazi, Adi; Åsman, Barbro; Asquith, Lily; Assamagan, Ketevi; Astalos, Robert; Atkinson, Markus; Atlay, Naim Bora; Augsten, Kamil; Aurousseau, Mathieu; Avolio, Giuseppe; Axen, Bradley; Ayoub, Mohamad Kassem; Azuelos, Georges; Baak, Max; Baas, Alessandra; Baca, Matthew John; Bacci, Cesare; Bachacou, Henri; Bachas, Konstantinos; Backes, Moritz; Backhaus, Malte; Bagiacchi, Paolo; Bagnaia, Paolo; Bai, Yu; Bain, Travis; Baines, John; Baker, Oliver Keith; Baldin, Evgenii; Balek, Petr; Balestri, Thomas; Balli, Fabrice; Banas, Elzbieta; Banerjee, Swagato; Bannoura, Arwa A E; Bansil, Hardeep Singh; Barak, Liron; Barberio, Elisabetta Luigia; Barberis, Dario; Barbero, Marlon; Barillari, Teresa; Barisonzi, Marcello; Barklow, Timothy; Barlow, Nick; Barnes, Sarah Louise; Barnett, Bruce; Barnett, Michael; Barnovska, Zuzana; Baroncelli, Antonio; Barone, Gaetano; Barr, Alan; Barreiro, Fernando; Barreiro Guimarães da Costa, João; Bartoldus, Rainer; Barton, Adam Edward; Bartos, Pavol; Basalaev, Artem; Bassalat, Ahmed; Basye, Austin; Bates, Richard; Batista, Santiago Juan; Batley, Richard; Battaglia, Marco; Bauce, Matteo; Bauer, Florian; Bawa, Harinder Singh; Beacham, James Baker; Beattie, Michael David; Beau, Tristan; Beauchemin, Pierre-Hugues; Beccherle, Roberto; Bechtle, Philip; Beck, Hans Peter; Becker, Kathrin; Becker, Maurice; Becker, Sebastian; Beckingham, Matthew; Becot, Cyril; Beddall, Andrew; Beddall, Ayda; Bednyakov, Vadim; Bee, Christopher; Beemster, Lars; Beermann, Thomas; Begel, Michael; Behr, Janna Katharina; Belanger-Champagne, Camille; Bell, William; Bella, Gideon; Bellagamba, Lorenzo; Bellerive, Alain; Bellomo, Massimiliano; Belotskiy, Konstantin; Beltramello, Olga; Benary, Odette; Benchekroun, Driss; Bender, Michael; Bendtz, Katarina; Benekos, Nektarios; Benhammou, Yan; Benhar Noccioli, Eleonora; Benitez Garcia, Jorge-Armando; Benjamin, Douglas; Bensinger, James; Bentvelsen, Stan; Beresford, Lydia; Beretta, Matteo; Berge, David; Bergeaas Kuutmann, Elin; Berger, Nicolas; Berghaus, Frank; Beringer, Jürg; Bernard, Clare; Bernard, Nathan Rogers; Bernius, Catrin; Bernlochner, Florian Urs; Berry, Tracey; Berta, Peter; Bertella, Claudia; Bertoli, Gabriele; Bertolucci, Federico; Bertsche, Carolyn; Bertsche, David; Besana, Maria Ilaria; Besjes, Geert-Jan; Bessidskaia Bylund, Olga; Bessner, Martin Florian; Besson, Nathalie; Betancourt, Christopher; Bethke, Siegfried; Bevan, Adrian John; Bhimji, Wahid; Bianchi, Riccardo-Maria; Bianchini, Louis; Bianco, Michele; Biebel, Otmar; Biedermann, Dustin; Bieniek, Stephen Paul; Biglietti, Michela; Bilbao De Mendizabal, Javier; Bilokon, Halina; Bindi, Marcello; Binet, Sebastien

    2015-01-01

    An observation of the $\\Lambda_b^0 \\rightarrow \\psi(2S) \\Lambda^0$ decay and a comparison of its branching fraction with that of the $\\Lambda_b^0 \\rightarrow J/\\psi \\Lambda^0$ decay has been made with the ATLAS detector in proton--proton collisions at $\\sqrt{s}=8\\,$TeV at the LHC using an integrated luminosity of $20.6\\,$fb$^{-1}$. The $J/\\psi$ and $\\psi(2S)$ mesons are reconstructed in their decays to a muon pair, while the $\\Lambda^0\\rightarrow p\\pi^-$ decay is exploited for the $\\Lambda^0$ baryon reconstruction. The $\\Lambda_b^0$ baryons are reconstructed with transverse momentum $p_{\\rm T}>10\\,$GeV and pseudorapidity $|\\eta|<2.1$. The measured branching ratio of the $\\Lambda_b^0 \\rightarrow \\psi(2S) \\Lambda^0$ and $\\Lambda_b^0 \\rightarrow J/\\psi \\Lambda^0$ decays is $\\Gamma(\\Lambda_b^0 \\rightarrow \\psi(2S)\\Lambda^0)/\\Gamma(\\Lambda_b^0 \\rightarrow J/\\psi\\Lambda^0) = 0.501\\pm 0.033 ({\\rm stat})\\pm 0.019({\\rm syst})$, lower than the expectation from the covariant quark model.

  3. Branched Polymers

    E-Print Network [OSTI]

    Richard Kenyon; Peter Winkler

    2007-09-14

    Building on and from the work of Brydges and Imbrie, we give an elementary calculation of the volume of the space of branched polymers of order $n$ in the plane and in 3-space. Our development reveals some more general identities, and allows exact random sampling. In particular we show that a random 3-dimensional branched polymer of order $n$ has diameter of order $\\sqrt{n}$.

  4. Ing Arvid Nesheim | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View NewTexas: Energy ResourcesOrder at 8, 13 (Vt.Infinifuel Biodiesel JumpInfotilityIng Arvid

  5. REU PROJECT ON BRANCH POLYMERS SARA BILLEY, TOM BOOTHBY, MORGAN EICHWALD, AND CHRIS FOX

    E-Print Network [OSTI]

    Billey, Sara

    REU PROJECT ON BRANCH POLYMERS SARA BILLEY, TOM BOOTHBY, MORGAN EICHWALD, AND CHRIS FOX 1. A branched polymer of order n in R2 is obtained by plac- ing these disks in the plane in any configuration so at the origin. Branched polymers have been studied in con- nection with molecular chemistry, statistical physics

  6. Measurements of branching fraction ratios and CP-asymmetries in suppressed B-? D(? K+?-)K- and B-? D(? K+?-)?- decays

    SciTech Connect (OSTI)

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

    2011-08-01

    We report the first reconstruction in hadron collisions of the suppressed decays B-? D(? K+?-)K- and B-? D(? K+?-)?- decays, sensitive to the CKM phase {gamma}, using data from 7 fb-1 of integrated luminosity collected by the CDF II detector at the Tevatron collider. We reconstruct a signal for the B-? D(? K+?-)K- suppressed mode with a significance of 3.2 standard deviations, and measure the ratios of the suppressed to favored branching fractions R(K) = [22.0 ± 8.6(stat) ± 2.6(syst)] x 10-3, R+(K) = [42.6 ± 13.7(stat) ± 2.8(syst)] x 10-3, R-(K) = [3.8 ± 10.3(stat) ± 2.7(syst)] x 10-3 as well as the direct CP-violating asymmetry A(K) = -0.82±0.44(stat)±0.09(syst) of this mode. Corresponding quantities for B- ? D(? K+?-)?- decay are also reported.

  7. Mechanical properties of branched actin filaments

    E-Print Network [OSTI]

    Mohammadhosein Razbin; Martin Falcke; Panayotis Benetatos; Annette Zippelius

    2015-06-26

    Cells moving on a two dimensional substrate generate motion by polymerizing actin filament networks inside a flat membrane protrusion. New filaments are generated by branching off existing ones, giving rise to branched network structures. We investigate the force-extension relation of branched filaments, grafted on an elastic structure at one end and pushing with the free ends against the leading edge cell membrane. Single filaments are modeled as worm-like chains, whose thermal bending fluctuations are restricted by the leading edge cell membrane, resulting in an effective force. Branching can increase the stiffness considerably; however the effect depends on branch point position and filament orientation, being most pronounced for intermediate tilt angles and intermediate branch point positions. We describe filament networks without cross-linkers to focus on the effect of branching. We use randomly positioned branch points, as generated in the process of treadmilling, and orientation distributions as measured in lamellipodia. These networks reproduce both the weak and strong force response of lamellipodia as measured in force-velocity experiments. We compare properties of branched and unbranched networks. The ratio of the network average of the force per branched filament to the average force per unbranched filament depends on the orientation distribution of the filaments. The ratio exhibits compression dependence and may go up to about 4.5 in networks with a narrow orientation distribution. With orientation distributions measured in lamellipodia, it is about two and essentially independent from network compression, graft elasticity and filament persistence length.

  8. Detector for measuring the $?^+\\to e^+?_e$ branching fraction

    E-Print Network [OSTI]

    A. A. Aguilar-Arevalo; M. Aoki; M. Blecher; D. vom Bruch; D. Bryman; J. Comfort; S. Cuen-Rochin; L. Doria; P. Gumplinger; A. Hussein; Y. Igarashi; N. Ito; S. Ito; S. H. Kettell; L. Kurchaninov; L. Littenberg; C. Malbrunot; R. E. Mischke; A. Muroi; T. Numao; G. Sheffer; A. Sher; T. Sullivan; K. Tauchi; D. Vavilov; K. Yamada; M. Yoshida

    2015-05-11

    The PIENU experiment at TRIUMF is aimed at a measurement of the branching ratio $R^{e/\\mu}$ = ${\\Gamma\\big((\\pi^{+} \\rightarrow e^{+} \

  9. LACEwING: Lessons from a New Moving Group Code

    E-Print Network [OSTI]

    Riedel, Adric R

    2015-01-01

    With all the new discoveries being made about nearby young stars, the ability to find new nearby young stars is as important as ever, and membership identification codes will continue to perform a vital role in scientific research. In the process of creating a new moving group membership identification code - LocAting Constituent mEmbers In Nearby Groups (LACEwING) - we have discovered a few pointers relevant to astronomers trying to use codes like LACEwING to locate young stars.

  10. STEM-ing the Tide | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterestedReplacement-2-AA-1 SECTION JSTEM-ing the Tide STEM-ing the Tide September 29,

  11. PUBLICATIONS BRANCH OF TECHNOLOGY

    E-Print Network [OSTI]

    INDEX of PUBLICATIONS by the BRANCH OF TECHNOLOGY BUREAU OF COMMERCIAL FISHERIES, 1955-59 Inclusive OF PUBLICATIONS BY THE BRANCH OF TECHNOLOGY BUREAU OF COMMERCIAL FISHERIES 1955-59 Inclusive by F. Bruce Sanford continue s, for the year s 1955- 59, the listing of publications by the Branch of Technology given

  12. InventIngFuture Virginia Tech Research CenterArlington

    E-Print Network [OSTI]

    , and provides seed capital for new university initiatives. #12;buIldInglocatIon and Virginia Tech Research. The new Virginia Tech Research Center will drive greater ingenuity and innovation for both ArlingtonInventIngFuture the Virginia Tech Research Center­Arlington Virginia Tech is an equal opportunity

  13. Investigador Departamento Nazario Ramrez, PhD Ing. Industrial

    E-Print Network [OSTI]

    Gilbes, Fernando

    Ingeniería Agrícola Nazario Ramírez, PhD Ing. Industrial Ciencias Marinas Ciencias Marinas Por segundo año. Morell, PhD Correlate data from electronic databases to ocean measurements Pieter Van der Meer Durante el: Hurricane wind profile model Eric Harmsen, PhD Química Aurelio Mercado Aidalú Joubert, PhD Proyecto: Física

  14. Successful application of promis-ing new technologies is predicated

    E-Print Network [OSTI]

    34 Successful application of promis- ing new technologies is predicated on understanding Fisheries Service, NOAA. Abstract--New technologies can be riddled with unforeseen sources of error and controlling sources of errors. The need to identify sources of error with the development of new fisheries

  15. Melons are branched polymers

    E-Print Network [OSTI]

    Razvan Gurau; James P. Ryan

    2013-02-18

    Melonic graphs constitute the family of graphs arising at leading order in the 1/N expansion of tensor models. They were shown to lead to a continuum phase, reminiscent of branched polymers. We show here that they are in fact precisely branched polymers, that is, they possess Hausdorff dimension 2 and spectral dimension 4/3.

  16. Branching Ratio of the Electromagnetic Decay of the ?+(1385)

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Keller, D.; Hicks, K.; Adhikari, K. P.; Adikaram, D.; Amaryan, M. J.; Anghinolfi, M.; Baghdasaryan, H.; Ball, J.; Battaglieri, M.; Bedlinskiy, I.; et al

    2012-03-01

    The CLAS detector was used to obtain the first ever measurement of the electromagnetic decay of the ?*+(1385) from the reaction ?p ? K0 ?*+(1385). A real photon beam with a maximum energy of 3.8 GeV was incident on a liquid-hydrogen target, resulting in the photoproduction of the kaon and ?* hyperon. Kinematic fitting was used to separate the reaction channel from the background processes. The fitting algorithm exploited a new method to kinematically fit neutrons in the CLAS detector, leading to the partial width measurement of 250.0 ± 56.9(stat)-41.2+34.3(sys) keV. A U-spin symmetry test using the SU(3) flavor-multiplet representationmore »yields predictions for the ?*+(1385) ? ?+? and ?*0(1385) ? ?? partial widths that agree with the experimental measurements.« less

  17. Higgs boson hadronic branching ratios at the ILC (Journal Article) |

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfate Reducing(Journal Article)lasers (Journal Article) |different|(Journal Article)

  18. Measurement of the ratio of the production cross sections times branching fractions of Bc± ? J/??±and B± ? J/? K± and B(Bc±? J/? ?±?±?-/+)/B(Bc± ? J/? ?±) in pp collisions at ?s = 7 TeV

    SciTech Connect (OSTI)

    Khachatryan, V. [Yerevan Physics Institute (Armenia)

    2015-01-01

    The ratio of the production cross sections times branching fractions (?(Bc±) B(Bc± ? J/??±))/(?(B±) B(B± ? J/?K±) is studied in proton-proton collisions at a center-of-mass energy of 7 TeV with the CMS detector at the LHC. The kinematic region investigated requires Ba,sub>c± and B±mesons with transverse momentum p? > 15 GeV and rapidity |y| < 1.6. The data sample corresponds to an integrated luminosity of 5.1 fb-1. The ratio is determined to be [0.48 ± 0.05 (stat) ± 0.03(syst) ± 0.05 (?Bc)]% The J/??±?±?-/+ decay mode is also observed in the same data sample. Using a model-independent method developed to measure the efficiency given the presence of resonant behaviour in the three-pion system, the ratio of the branching fractions J/? ?±?±?-/+)/B(Bc± is measured to be 2.55 ± 0.80(stat) ± 0.33(syst) +0.04-0.01 (?Bc), consistent with the previous LHCb result.

  19. Radioiodinated branched carbohydrates

    DOE Patents [OSTI]

    Goodman, Mark M. (Knoxville, TN); Knapp, Jr., Furn F. (Oak Ridge, TN)

    1989-01-01

    A radioiodinated branched carbohydrate for tissue imaging. Iodine-123 is stabilized in the compound by attaching it to a vinyl functional group that is on the carbohydrate. The compound exhibits good uptake and retention and is promising in the development of radiopharmaceuticals for brain, heart and tumor imaging.

  20. Effect of resolved branches on the performance of delayed branching 

    E-Print Network [OSTI]

    Ramabhadran, Anurekha

    1995-01-01

    The impact of resolved branch instructions on the performance of the delayed branching scheme is studied for a two-instruction-issue superscalar pipelined RISC processor. Two processor models are created in Verilog HDL, ...

  1. The Misunderstood Social Activist: A Reexamination of the Plays of William Inge

    E-Print Network [OSTI]

    Woods, Robert

    2013-05-03

    2 The Misunderstood Social Activist: A Reexamination of the Plays of William Inge By Robert Woods © 2013 Robert Woods ALL RIGHTS RESERVED 3 On December 5... the central relationship of the play, between Bo, Inge's by-then-typical brawny, unintellectual male stud, and Cherie, the young woman who has gotten herself into difficulties by giving in to her sexual desires. It is that relationship which Inge uses...

  2. Branched Polymers and Hyperplane Arrangements

    E-Print Network [OSTI]

    Postnikov, Alexander

    We generalize the construction of connected branched polymers and the notion of the volume of the space of connected branched polymers studied by Brydges and Imbrie (Ann Math, 158:1019–1039, 2003), and Kenyon and Winkler ...

  3. Constraint Orbital Branching JAMES OSTROWSKI

    E-Print Network [OSTI]

    Linderoth, Jeffrey T.

    of Ostrowski et al. [2007] to the case of branching on disjunctions formed by inequalities--constraint orbital

  4. BRANCHED POLYMERS AND HYPERPLANE ARRANGEMENTS

    E-Print Network [OSTI]

    Postnikov, Alexander

    BRANCHED POLYMERS AND HYPERPLANE ARRANGEMENTS KAROLA M´ESZ´AROS ALEXANDER POSTNIKOV Abstract. We of connected branched polymers studied by Brydges and Imbrie [BI], and Kenyon and Winkler [KW] to any hyperplane arrangement A. The volume of the resulting configuration space of connected branched polymers

  5. "Dark Web: Exploring and Min-ing the Dark Side of the Web"

    E-Print Network [OSTI]

    Michelsen, Claus

    Title: "Dark Web: Exploring and Min- ing the Dark Side of the Web" Speaker: Director, Prof will review the emerging research in Terrorism Informatics based on a web mining perspective. Recent progress in the internationally re- nowned Dark Web project will be reviewed, including: deep/dark web spider- ing (web sites

  6. Franois Barthelat, Ph.D, Ing. Department of Mechanical Engineering Phone: (514) 3986318

    E-Print Network [OSTI]

    Barthelat, Francois

    1 François Barthelat, Ph.D, Ing. Department of Mechanical Engineering Phone: (514 APPOINTMENTS Associate Professor, Mechanical Engineering, McGill University (2012present) Assistant Professor, Mechanical Engineering, McGill University (20062012) Associate Member, Biomedical Engineering

  7. ISIS polarimetry for ING support astronomers Isaac Newton Group of Telescopes

    E-Print Network [OSTI]

    ISIS polarimetry for ING support astronomers Isaac Newton Group of Telescopes Pablo Rodr 0.1 Document history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1 ISIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.2 Setting up ISIS for spectropolarimetry . . . . . . . . . . . . . . . . . . . . . 4 1

  8. Fachgebiet Leistungselektronik und Elektrische Antriebstechnik Prof. Dr.-Ing. J. Bcker

    E-Print Network [OSTI]

    Paderborn, Universität

    Pos.1 Pos.2 iC C R iR u(t) Zum Zeitpunkt t = 0 werde der Schalter S von Position 1 in Position 2 Elektrische Antriebstechnik Prof. Dr.-Ing. J. Böcker Pos.2 12T1T t0T 13T Schalter- stellung Pos.1 12T1T t0T 13 und Elektrische Antriebstechnik Prof. Dr.-Ing. J. Böcker Aufgabe 4: RL-Reihenschaltung S U0 Pos.1 Pos

  9. Detector for measuring the ?+ ? e+v branching fraction

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Aguilar-Arevalo, A. A.; Aoki, M.; Blecher, M.; Bruch, D. vom; Bryman, D.; Comfort, J.; Cuen-Rochin, S.; Doria, L.; Gumplinger, P.; Hussein, A.; et al

    2015-04-13

    The PIENU experiment at TRIUMF is aimed at a measurement of the branching ratio Re/u = ?((?+ ? e+ve) + (?+ ? e+ve?))/?((?+ ? ?+v?) + (?+ ? ?+v??)) with precision more »This paper provides a description of the PIENU experimental apparatus and its performance in pursuit of Re/u« less

  10. Measurement of the branching fraction for D+ -> kappa(-) pi(+) pi(+)

    E-Print Network [OSTI]

    Ammar, Raymond G.; Ball, S.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Copty, N.; Davis, Robin E. P.; Hancock, N.; Kelly, M.; Kwak, Nowhan; Lam, H.

    1994-04-01

    Using the CLEO II detector at the Cornell Electron Storage Ring we have measured the ratio of branching fractions, B(D+ --> K-pi+pi+)/B(D0 --> K-pi+ = 2.35 +/- 0.16 +/- 0.16. Our recent measurement of B(D0 --> K-pi+) then gives B(D+ --> K-pi+pi...

  11. Volume 80A, number 4 PHYSICSLETTERS 8 December 1980 FEIGENBAUM'S RATIOS OF TWO-DIMENSIONAL AREA PRESERVING MAPS

    E-Print Network [OSTI]

    Derrida, Bernard

    Volume 80A, number 4 PHYSICSLETTERS 8 December 1980 FEIGENBAUM'S RATIOS OF TWO-DIMENSIONAL AREA preserv- ing case [10] 217 #12;Volume 80A, number 4 PHYSICS LETTERS 8 December 1980 G(x,y) = (1 -//x 2 +y

  12. Anacostia Tributary Trail System Paint Branch Trail

    E-Print Network [OSTI]

    Bernstein, Joseph B.

    Anacostia Tributary Trail System Paint Branch Trail Under Construction Under Construction B oulevard (M D 193) To University Boulevard Paint Branch Parkway Dickinson Avenue Princeton Avenue

  13. Status of the experiments on radiative branch of decay

    E-Print Network [OSTI]

    R. U. Khafizov; S. V. Tolokonnikov; V. A. Solovei; M. R. Kolhidashvili

    2009-03-09

    This report is dedicated to the investigation of radiative neutron decay. The theoretical spectrum of radiative gamma quanta, calculated within the framework of the standard electroweak interaction model, is compared with our experimental value of branching ratio (B.R.) for radiative neutron decay. It is noted that the study of radiative branches of elementary particle decay occupies a central place in the fundamental problem of searching for deviations from the standard electroweak model. Particular attention is paid to analyzing the results of the experiment conducted at the FRMII reactor of the Technical University of Munich in 2005.

  14. Female-biased sex ratios and the proportion of cryptic male morphs of migrant juvenile Ruffs

    E-Print Network [OSTI]

    - sons, such as biased primary ratio and differential juvenile or adult mortality of sexes. Global bias, we report the sex ratios among juvenile Ruffs on their southward migration in Finland during 1985, and examine migration tim- ing by sex. We found a strong female bias in juvenile populations; across the study

  15. A review of "“The Temple” mit einer deutschen Versübersetzung." by Inge Leimberg ed. George Herbert 

    E-Print Network [OSTI]

    Bill Engel

    2002-01-01

    Herbert. ?The Temple? mit einer deutschen Vers?bersetzung. Ed. Inge Leimberg. M?nster, New York, Munich, Berlin: Waxmann Verlag, 2002. xx + 473 pp. 39,00 EURO. Review by BILL ENGEL (NASHVILLE, TENNESSEE). Seventeenth-century scholars will be delighted... and instructed by Inge Leimberg?s facing-page translation of the 1633 Cambridge edition of The Temple. The notes alone will amply reward any reader of German (403-44). Not every poem is glossed, however, for Leimberg has carefully selected what is in need...

  16. A Place of His Own: Inge's "The Tiny Closet" as Outside Sexual and Political Orders

    E-Print Network [OSTI]

    Warren, Brian; Hernandez, Teresa

    2013-05-03

    mainstream society. Homosexuality, which is merely implied by the tenant’s hat making, makes Mr. Newbold an outcast and a “creature” (Inge 64) outside of social acceptance. As Mrs. Crosby screams “Hats! Hats! Hats! With flowers on them” with disbelief, Mrs... “big four” full-length plays (Come Back, Little Sheba; Picnic; Bus Stop; and The Dark at the Top of the Stairs) were beginning to establish his greatness as a playwright. Inge famously developed one of his one-acts, People in the Wind, into the full...

  17. Water Quality Protection and Management Prof. Dr.-Ing. habil. Herwig Lehmann

    E-Print Network [OSTI]

    Rotation and Land Preparation easures 1. Farm Ponds 2. Water Harvesting Measures 1. Checkdam/Reservoir 2Water Quality Protection and Management Prof. Dr.-Ing. habil. Herwig Lehmann University of Hannover Use & Land Cover TopographyTopography Semi arid/Sub- humid Climatic Watershed Quantitative Water

  18. Prof. Ing. Alessandro A.Golkar, PhD Skolkovo Institute of Science and Technology

    E-Print Network [OSTI]

    Architecture for Large-Scale Infrastructures; Space Systems, Small Satellite Technology. OTHER CURRENTProf. Ing. Alessandro A.Golkar, PhD Skolkovo Institute of Science and Technology 100 Novaya Ulitsa and Technology (Skoltech) in Moscow, Russian Federation, a private university opened in collaboration with MIT

  19. CAD BASED DRILLING USING CONVENTIONAL TWIST DRILLS PANAGIOTIS KYRATSIS*, Dr. Ing. NIKOLAOS BILALIS**, Dr. VASILIS

    E-Print Network [OSTI]

    Aristomenis, Antoniadis

    CAD BASED DRILLING USING CONVENTIONAL TWIST DRILLS PANAGIOTIS KYRATSIS*, Dr. Ing. NIKOLAOS BILALIS, antoniadis@dpem.tuc.gr Abstract: Twist drills are geometrically complex tools, which are used in industry and experimental approaches for drilling simulation. The present paper is based on the ground that the increasing

  20. Department of Power Electronics and Electrical Drives Prof. Dr.Ing. Joachim Bcker

    E-Print Network [OSTI]

    Paderborn, Universität

    Ing. J. Böcker Power Electronics Trial Exam: (Summer Term 2014) Page 3 of 5 Task 2: Buck-Boost converter (25 Points) Figure 2 shows a buck-boost converter. The switches S1 and D1 are assumed to be ideal in continuous conduction mode. Fig.2 : Buck-Boost converter 2.1 Write down the differential equations

  1. Department of Power Electronics and Electrical Drives Prof. Dr. Ing. Joachim Bcker

    E-Print Network [OSTI]

    Paderborn, Universität

    Converter (25 Points) Figure 1 shows a boost converter. The input voltage to the converter is U1 = 8 V Figure 1: Boost converter Note: For questions 1.1 to 1.5, RC can be considered zero. Estimate Drives Prof. Dr. Ing. J. Böcker Power Electronics Final Examination SS 2014 Page 2 of 6 Task 1: Boost

  2. Fachgebiet Leistungselektronik und Elektrische Antriebstechnik Prof. Dr.Ing. Joachim Bcker

    E-Print Network [OSTI]

    Paderborn, Universität

    .01.2014 Test Examination: Mechatronics and Electrical Drives Page 1 of 8 Test Examination: Mechatronics.01.2014 Test Examination: Mechatronics and Electrical Drives Page 2 of 8 Exercise 1: Basic Magnetics (20 Points Elektrische Antriebstechnik Prof. Dr.­Ing. J. Böcker 08.01.2014 Test Examination: Mechatronics and Electrical

  3. Department of Power Electronics and Electrical Drives Prof. Dr.Ing. Joachim Bcker

    E-Print Network [OSTI]

    Paderborn, Universität

    .09.2014 Mechatronics und Electrical Drives SS 2014 Page 1 of 6 Mechatronics and Electrical Drives 03.09.2014 Surname Drives Prof. Dr.­Ing. J. Böcker 03.09.2014 Mechatronics und Electrical Drives SS 2014 Page 2 of 6.09.2014 Mechatronics und Electrical Drives SS 2014 Page 3 of 6 Aufgabe 2: Reluctance motor (18 Points) The profiles

  4. Climate change is not "a problem" wait-ing for "a solution". It is an environ-

    E-Print Network [OSTI]

    Hulme, Mike

    41 Climate change is not "a problem" wait- ing for "a solution". It is an environ- mental, cultural humanity's place on Earth. My new book, Why We Disagree About Climate Change, dissects this idea of climate about it. It also develops a different way of approaching the idea of climate change and of working

  5. NTNU Dr. ing. Thesis 2001:43 Ivar J. Halvorsen Minimum Energy Requirements

    E-Print Network [OSTI]

    Skogestad, Sigurd

    was followed in more detail. My background is from the department of Engineering Cybernetics, NTNU, where I- neer to have a basic understanding of the process behaviour. In process design, chemical engineers Engineering Norwegian University of Science and Technology N-7491 Trondheim, Norway Dr. ing. Thesis 2001

  6. Ministry of Environment Ecosystem Branch

    E-Print Network [OSTI]

    Ministry of Environment Ecosystem Branch 2202 Main Mall University of British Columbia Vancouver aware of and which would definitely provide information applicable throughout the basin, is a study being proposed by Dr. Molly Webb. The last three years of this study will provide information

  7. Statistical distributions of earthquake numbers: consequence of branching process

    E-Print Network [OSTI]

    Kagan, Yan Y

    2010-01-01

    Statistical short-term earthquake prediction, Science, Kotz,Earthquake interaction, forecast- ing, and prediction <

  8. Analysis and Comparison between War Driving and War Walk-ing in Metropolitan WiFi Radio Maps

    E-Print Network [OSTI]

    Chu, Hao-hua

    Analysis and Comparison between War Driving and War Walk- ing in Metropolitan WiFi Radio Maps Arvin, Hsinchu County, 310, Taiwan arvin@itri.org.tw ABSTRACT War-driving is currently the most widely adopted cost for war driv- ing is smaller than that of war walking, its positional accu- racy is also lower

  9. REVISTA INTERNACIONAL METODOS NUMERICOS EN INGENIERIA Rev. Int. Met. Numer. Ing.

    E-Print Network [OSTI]

    Gomez, Hector

    REVISTA INTERNACIONAL M´ETODOS NUM´ERICOS EN INGENIER´IA Rev. Int. M´et. Num´er. Ing. Un nuevo´ericos en Ingenier´ia, GMNI Departamento de M´etodos Matem´aticos y de Representaci´on E.T.S. de Ingenieros aplicaciones pr´acticas de ingenier´ia el transporte se produce conjuntamente por convecci´on y por difusi

  10. New Branches of Massive Gravity

    E-Print Network [OSTI]

    Comelli, Denis; Koyama, Kazuya; Pilo, Luigi; Tasinato, Gianmassimo

    2015-01-01

    The basic building block for Lorentz invariant and ghost free massive gravity is the square root of the combination $g^{-1}\\eta\\,$, where $g^{-1}$ is the inverse of the physical metric and $\\eta$ is a reference metric. Since the square root of a matrix is not uniquely defined, it is possible to have physically inequivalent potentials corresponding to different branches. We show that around Minkowski background the only perturbatively well defined branch is the potential proposed by de Rham, Gabadadze and Tolley. On the other hand, if Lorentz symmetry is broken spontaneously, other potentials exist with a standard perturbative expansion. We show this explicitly building new Lorentz invariant, ghost-free massive gravity potentials for theories that in the background preserve rotational invariance, but break Lorentz boosts.

  11. Solid State Photovoltaic Research Branch

    SciTech Connect (OSTI)

    Not Available

    1990-09-01

    This report summarizes the progress of the Solid State Photovoltaic Research Branch of the Solar Energy Research Institute (SERI) from October 1, 1988, through September 30,l 1989. Six technical sections of the report cover these main areas of SERIs in-house research: Semiconductor Crystal Growth, Amorphous Silicon Research, Polycrystalline Thin Films, III-V High-Efficiency Photovoltaic Cells, Solid-State Theory, and Laser Raman and Luminescence Spectroscopy. Sections have been indexed separately for inclusion on the data base.

  12. RUSSIAN ACADEMY OF SCIENCES Ural Branch

    E-Print Network [OSTI]

    Turova, Varvara

    with the homicidal chau#11;eur dynamics: Scienti#12;c reports. IMM Ural Branch of RAS. Ekaterinburg, Russia, 2000RUSSIAN ACADEMY OF SCIENCES Ural Branch Institute of Mathematics and Mechanics Scienti#12;c reports of Mathematics and Mechanics Ural Branch of RAS Patsko V.S., Turova V.L. Numerical study of di#11;erential games

  13. The branching programme of mouse lung development

    E-Print Network [OSTI]

    Krasnow, Mark A.

    ARTICLES The branching programme of mouse lung development Ross J. Metzger1 {, Ophir D. Klein2 {, Gail R. Martin2 & Mark A. Krasnow1 Mammalian lungs are branched networks containing thousands by three geometrically simple local modes of branching used in three different orders throughout the lung

  14. Walker Branch Watershed Ecosystems Data

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    These projects have all contributed to a more complete understanding of how forest watersheds function and have provided insights into the solution of energy-related problems associated with air pollution, contaminant transport, and forest nutrient dynamics. This is one of a few sites in the world characterized by long-term, intensive environmental studies. The Walker Branch Watershed website at http://walkerbranch.ornl.gov/ provides maps, photographs, and data on climate, precipitation, atmospheric deposition, stream discharge and runoff, stream chemistry, and vegetation. [Taken from http://walkerbranch.ornl.gov/ABOUTAAA.HTM

  15. The Essence of American Drama: The Short Plays of William Inge

    E-Print Network [OSTI]

    Wolf, Howard R.

    2012-04-01

    to the World” (441) Lenny and George in Of Mice and Men; Alice Hindman in Sherwood Anderson’s “Adventure” (Winesburg, Ohio); The Lone Ranger and Tonto (?), and many others. One of those other pairs is Ben and the Old Man (the professor, again.... 5. SEXUAL LIBERATION: 1960-2010 It’s hard to know what kinds of plays William Inge might have written and how they would have been received, had he emerged in the 1960’s, not 1950’s. If he had experienced the permissiveness atmosphere of the 1960...

  16. Thermodynamic Branch in the Chemical System Response to External Impact

    E-Print Network [OSTI]

    Zilbergleyt, B

    2012-01-01

    The paper gives an account of a detailed investigation of the thermodynamic branch as a path of the chemical system deviation from its isolated thermodynamic equilibrium under an external impact. For a combination of direct and reverse reactions in the same chemical system, full thermodynamic branch is presented by an S-shaped curve, whose ends asymptotically achieve appropriate initial states, which, in turn, are logistic ends of the opposite reactions. The slope tangents of the steepest parts of the curves, the areas of the maximum rate of the shift growth vs. the external thermodynamic force, occurred to be directly proportional to the force and, simultaneously, linearly proportional to the thermodynamic equivalent of chemical reaction, which is the ratio between the amount in moles of any reaction participant, transformed in an isolated system, along the reaction way from its initial state to thermodynamic equilibrium, to its stoichiometric coefficient. The found linearity is valid for arbitrary combinati...

  17. Jozo Dujmovi was born in Dubrovnik, Croatia. He received the Dipl. Ing. degree in electronic and telecommunication engineering and the

    E-Print Network [OSTI]

    Dujmovic, Jozo J.

    Jozo Dujmovi was born in Dubrovnik, Croatia. He received the Dipl. Ing. degree in electronic on Software and Performance (WOSP 2004). #12;Jozo Dujmovi (M'92-SM'97) was born in Dubrovnik, Croatia. He

  18. Histone H3K4me3 Binding Is Required for the DNA Repair and Apoptotic Activities of ING1 Tumor

    E-Print Network [OSTI]

    Verkhusha, Vladislav V.

    of growth 1 (ING1) is implicated in oncogenesis, DNA damage repair, and apoptosis. Mutations within the ING11) is a member of the recently discovered family of tumor suppressors implicated in oncogenesis

  19. Can Planets Influence the Horizontal Branch Morphology?

    E-Print Network [OSTI]

    Noam Soker

    1998-03-19

    As stars which have planetary systems evolve along the red giant branch and expand, they interact with the close planets. The planets deposit angular momentum and energy into the red giant stars' envelopes, both of which are likely to enhance mass loss on the red giant branch. The enhanced mass loss causes the star to become bluer as it turns to the horizontal branch. I propose that the presence of planetary systems, through this mechanism, can explain some anomalies in horizontal branch morphologies. In particular, planetary systems may be related to the ``second parameter'', which determines the distribution of horizontal branch stars on the Hertzsprung-Russel diagram. The proposed scenario predicts that surviving massive planets or brown dwarfs orbit many of the extreme blue horizontal branch stars, at orbital periods of tens days.

  20. MD Simulation Study of the Influence of Branch Content on Relaxation and Crystallization of Branched Polyethylene Chains with Uniform Branch Distribution

    E-Print Network [OSTI]

    Hussein, Ibnelwaleed A.

    of Branched Polyethylene Chains with Uniform Branch Distribution I. A. HUSSEIN, B. F. ABU-SHARKH* Department-density polyethylene (LLDPE) chains with different levels of branch content (BC), ranging from 10 to 80 branches/1000 C words: MD simulation, Polyethylene, branch content, chain conformation, radius of gyration

  1. Measurement of the inclusive semileptonic branching fraction B(B?s?X-l+?l) at Belle

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Oswald, C.; Urquijo, P.; Dingfelder, J.; Adachi, I.; Aihara, H.; Arinstein, K.; Asner, D. M.; Aushev, T.; Bakich, A. M.; Belous, K.; Bhardwaj, V.; Bhuyan, B.; Bondar, A.; Bonvicini, G.; Bozek, A.; Bra?ko, M.; Browder, T. E.; Chang, P.; Chekelian, V.; Chen, A.; Chen, P.; Cheon, B. G.; Chilikin, K.; Chistov, R.; Cho, K.; Chobanova, V.; Choi, S.-K.; Choi, Y.; Cinabro, D.; Dalseno, J.; Doležal, Z.; Drásal, Z.; Drutskoy, A.; Dutta, D.; Eidelman, S.; Esen, S.; Farhat, H.; Fast, J. E.; Gaur, V.; Gabyshev, N.; Ganguly, S.; Gillard, R.; Goh, Y. M.; Golob, B.; Haba, J.; Hayasaka, K.; Hayashii, H.; Horii, Y.; Hoshi, Y.; Hou, W.-S.; Hyun, H. J.; Iijima, T.; Ishikawa, A.; Itoh, R.; Iwasaki, Y.; Kah, D. H.; Kang, J. H.; Kato, E.; Kawasaki, T.; Kiesling, C.; Kim, H. J.; Kim, H. O.; Kim, J. B.; Kim, K. T.; Kim, M. J.; Kim, Y. J.; Kinoshita, K.; Klucar, J.; Ko, B. R.; Korpar, S.; Kouzes, R. T.; Križan, P.; Krokovny, P.; Kronenbitter, B.; Kuhr, T.; Kumita, T.; Kwon, Y.-J.; Lee, S.-H.; Li, J.; Li, Y.; Libby, J.; Liu, C.; Liu, Y.; Liu, Z. Q.; Liventsev, D.; Louvot, R.; Lutz, O.; Matvienko, D.; Miyabayashi, K.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Moll, A.; Muramatsu, N.; Nagasaka, Y.; Nakano, E.; Nakao, M.; Nedelkovska, E.; Nisar, N. K.; Nishida, S.; Nitoh, O.; Nozaki, T.; Ogawa, S.; Ohshima, T.; Okuno, S.; Olsen, S. L.; Ostrowicz, W.; Pakhlov, P.; Pakhlova, G.; Park, H.; Park, H. K.; Pedlar, T. K.; Pestotnik, R.; Petri?, M.; Piilonen, L. E.; Prim, M.; Prothmann, K.; Ritter, M.; Röhrken, M.; Rozanska, M.; Ryu, S.; Sahoo, H.; Saito, T.; Sakai, Y.; Sandilya, S.; Santelj, L.; Sanuki, T.; Sato, Y.; Schneider, O.; Schnell, G.; Schwanda, C.; Schwartz, A. J.; Senyo, K.; Seon, O.; Sevior, M. E.; Shapkin, M.; Shen, C. P.; Shibata, T.-A.; Shiu, J.-G.; Shwartz, B.; Sibidanov, A.; Simon, F.; Smerkol, P.; Sohn, Y.-S.; Sokolov, A.; Solovieva, E.; Stari?, M.; Sumiyoshi, T.; Tatishvili, G.; Teramoto, Y.; Trabelsi, K.; Tsuboyama, T.; Uchida, M.; Uehara, S.; Uglov, T.; Unno, Y.; Uno, S.; Van Hulse, C.; Vanhoefer, P.; Varner, G.; Varvell, K. E.; Wang, C. H.; Wang, M.-Z.; Wang, P.; Watanabe, M.; Watanabe, Y.; Williams, K. M.; Won, E.; Yamamoto, H.; Yamashita, Y.; Zhang, C. C.; Zhang, Z. P.; Zhilich, V.; Zupanc, A.

    2013-04-01

    We report a measurement of the inclusive semileptonic B0s branching fraction in a 121 fb?¹ data sample collected near the ?(5S) resonance with the Belle detector at the KEKB asymmetric energy e?e? collider. Events containing B?(*)sB¯¯¯?(*)s pairs are selected by reconstructing a tag side D?s and identifying a signal side lepton l? (l=e, ?) that is required to have the same-sign charge to ensure that both originate from different B?s mesons. The B?s?X?l??l branching fraction is extracted from the ratio of the measured yields of D?s mesons and D?sl? pairs and the known production and branching fractions. The inclusive semileptonic branching fraction is measured to be [10.6±0.5(stat)±0.7(syst)]%.

  2. Measurement of the inclusive semileptonic branching fraction B(B?s?X-l+?l) at Belle

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Oswald, C.; Urquijo, P.; Dingfelder, J.; Adachi, I.; Aihara, H.; Arinstein, K.; Asner, D. M.; Aushev, T.; Bakich, A. M.; Belous, K.; et al

    2013-04-30

    We report a measurement of the inclusive semileptonic B0s branching fraction in a 121 fb?¹ data sample collected near the ?(5S) resonance with the Belle detector at the KEKB asymmetric energy e?e? collider. Events containing B?(*)sB¯¯¯?(*)s pairs are selected by reconstructing a tag side D?s and identifying a signal side lepton l? (l=e, ?) that is required to have the same-sign charge to ensure that both originate from different B?s mesons. The B?s?X?l??l branching fraction is extracted from the ratio of the measured yields of D?s mesons and D?sl? pairs and the known production and branching fractions. The inclusive semileptonicmore »branching fraction is measured to be [10.6±0.5(stat)±0.7(syst)]%.« less

  3. Updated 7-11 Elliott B. Branch

    E-Print Network [OSTI]

    Updated 7-11 Elliott B. Branch Deputy Assistant Secretary of the Navy (Acquisition and Procurement) Office of the Assistant Secretary of the Navy Elliott B. Branch is the Deputy Assistant Secretary of the Navy (Acquisition and Procurement) in the Office of the Assistant Secretary of the Navy (Research

  4. Thermodynamic Branch in the Chemical System Response to External Impact

    E-Print Network [OSTI]

    B. Zilbergleyt

    2012-03-20

    The paper gives an account of a detailed investigation of the thermodynamic branch as a path of the chemical system deviation from its isolated thermodynamic equilibrium under an external impact. For a combination of direct and reverse reactions in the same chemical system, full thermodynamic branch is presented by an S-shaped curve, whose ends asymptotically achieve appropriate initial states, which, in turn, are logistic ends of the opposite reactions. The slope tangents of the steepest parts of the curves, the areas of the maximum rate of the shift growth vs. the external thermodynamic force, occurred to be directly proportional to the force and, simultaneously, linearly proportional to the thermodynamic equivalent of chemical reaction, which is the ratio between the amount in moles of any reaction participant, transformed in an isolated system, along the reaction way from its initial state to thermodynamic equilibrium, to its stoichiometric coefficient. The found linearity is valid for arbitrary combination of the stoichiometric coefficients in a reaction of compound synthesis from chemical elements like aA+bB=AaBb, and confirms the exclusive role of the thermodynamic equivalent of transformation as the chemical system characteristic of robustness and irreversibility. Results of this work allow for quantitative evaluation of the chemical system shift from thermodynamic equilibrium along thermodynamic branch and its rate vs. the shifting force. Such an investigation became possible due to the development of discrete thermodynamics of chemical equilibria.

  5. OGLE-ing the Magellanic system: stellar populations in the Magellanic Bridge

    SciTech Connect (OSTI)

    Skowron, D. M.; Jacyszyn, A. M.; Udalski, A.; Szyma?ski, M. K.; Skowron, J.; Poleski, R.; Koz?owski, S.; Kubiak, M.; Pietrzy?ski, G.; Soszy?ski, I.; Mróz, P.; Pietrukowicz, P.; Ulaczyk, K.; Wyrzykowski, ?., E-mail: dszczyg@astrouw.edu.pl [Warsaw University Astronomical Observatory, Aleje Ujazdowskie 4, 00-478 Warszawa (Poland)

    2014-11-10

    We report the discovery of a young stellar bridge that forms a continuous connection between the Magellanic Clouds. This finding is based on number density maps for stellar populations found in data gathered by OGLE-IV that fully cover over 270 deg{sup 2} of the sky in the Magellanic Bridge area. This is the most extensive optical survey of this region to date. We find that the young population is present mainly in the western half of the MBR, which, together with the newly discovered young population in the eastern Bridge, form a continuous stream of stars connecting both galaxies along ? ? –73.5 deg. The young population distribution is clumped, with one of the major densities close to the SMC and the other fairly isolated and located approximately mid-way between the Clouds, which we call the OGLE island. These overdensities are well matched by H I surface density contours, although the newly found young population in the eastern Bridge is offset by ?2 deg north from the highest H I density contour. We observe a continuity of red clump stars between the Magellanic Clouds which represent an intermediate-age population. Red clump stars are present mainly in the southern and central parts of the Magellanic Bridge, below its gaseous part, and their presence is reflected by a strong deviation from the radial density profiles of the two galaxies. This may indicate either a tidal stream of stars, or that the stellar halos of the two galaxies overlap. On the other hand, we do not observe such an overlap within an intermediate-age population represented by the top of the red giant branch and the asymptotic giant branch stars. We also see only minor mixing of the old populations of the Clouds in the southern part of the Bridge, represented by the lowest part of the red giant branch.

  6. ORIGINAL PAPER Functional coordination between branch hydraulic properties

    E-Print Network [OSTI]

    Malhi, Yadvinder

    ORIGINAL PAPER Functional coordination between branch hydraulic properties and leaf functional coordination between branch hydraulic properties and leaf functional traits among nine miombo woodlands canopy the question: are branch hydraulic properties coordinated with leaf functional traits linked to plant drought

  7. Software branch prediction via inter-procedural path profiling 

    E-Print Network [OSTI]

    Thoppae, Mothi M

    2002-01-01

    . Several authors have suggested ways of predicting the direction of conditional branches with hardware that uses the history of previous branches. The branches are predicted statically, which occurs during compile time, or dynamically, which occurs during...

  8. Branching Fraction and CP Asymmetry Measurements in Inclusive B -> Xs l+l- and B -> Xs gamma Decays from BABAR

    E-Print Network [OSTI]

    G. Eigen; representing the BABAR collaboration

    2015-03-08

    We present an update on total and partial branching fractions and on CP asymmetries in the semi-inclusive decay B -> Xs l+l-. Further, we summarize our results on branching fractions and CP asymmetries for semi-inclusive and fully-inclusive B -> Xs gamma decays. We present the first result on the CP asymmetry difference of charged and neutral B -> Xs gamma$ decays yielding the first constraint on the ratio of Wilson coefficients Im (C8/C7).

  9. FY 1990 Applied Sciences Branch annual report

    SciTech Connect (OSTI)

    Keyes, B.M.; Dippo, P.C.

    1991-11-01

    The Applied Sciences Branch actively supports the advancement of DOE/SERI goals for the development and implementation of the solar photovoltaic technology. The primary focus of the laboratories is to provide state-of-the-art analytical capabilities for materials and device characterization and fabrication. The branch houses a comprehensive facility which is capable of providing information on the full range of photovoltaic components. A major objective of the branch is to aggressively pursue collaborative research with other government laboratories, universities, and industrial firms for the advancement of photovoltaic technologies. Members of the branch disseminate research findings to the technical community in publications and presentations. This report contains information on surface and interface analysis, materials characterization, development, electro-optical characterization module testing and performance, surface interactions and FTIR spectroscopy.

  10. Measurement of the Ds(+) -> eta l(+)nu and Ds(+) ? eta'l(+)nu branching ratios

    E-Print Network [OSTI]

    Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Copty, N.; Davis, Robin E. P.; Hancock, N.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan

    1995-11-01

    Using the CLEO II detector we measure B(D-s(+) --> eta e(+)nu)/B(D-s(+) --> phi e(+)nu) = 1.24 +/- 0.12 +/- 0.15, B(D-s(+) --> eta'e(+)nu)/B(D-s(+) --> phi e(+)nu) = 0.43 +/- 0.11 +/- 0.07, and B(D-s(+) --> eta'e(+)nu)/B(D-s(+) --> eta e(+)nu) = 0...

  11. Measurement of the K L ! e + e Branching Ratio and Form Factor

    E-Print Network [OSTI]

    Fermilab

    .8026 ­0.0269 2.76 C 1: 0.8542 0.4121 2.42 C 4: 0.0155 ­0.0555 12.80 C 2: 0.0352 0.0285 18.06 C 5: ­0

  12. Branching Ratio of the Electromagnetic Decay of the ?+(1385)

    SciTech Connect (OSTI)

    Keller, D; Adhikari, K P; Adikaram, D; Amaryan, M J; Anghinolfi, M; Baghdasaryan, H; Ball, J; Battaglieri, M; Bedlinskiy, I; Biselli, A S; Bookwalter, C; Boiarinov, S; Branford, D; Briscoe, W J; Brooks, W K; Burkert, V D; Carman, D S; Celentano, A; Chandavar, S; Cole, P L; Contalbrigo, M; Crede, V; D'Angelo, A; Daniel, A; Dashyan, N; De Vita, R; De Sanctis, E; Djalali, C; Doughty, D; Dupre, R; El Alaoui, A; El Fassi, L; Elouadrhiri, L; Eugenio, P; Fedotov, G; Gabrielyan, M Y; Gevorgyan, N; Gilfoyle, G P; Giovanetti, K L; Gohn, W; Golovatch, E; Gothe, R W; Graham, L; Griffioen, K A; Guidal, M; Guler, N; Guo, L; Hafidi, K; Hakobyan, H; Holtrop, M; Ilieva, Y; Ireland, D G; Ishkhanov, B S; Isupov, E L; Jo, H S; Joo, K; Khandaker, M; Khertarpal, P; Kim, A; Kim, W; Klein, F J; Kubarovsky, A; Kubarovsky, V; Kuleshov, S V; Lu, H Y; MacGregor, I.J. D; Mao, Y; Markov, N; Mayer, M; McKinnon, B; Meyer, C A; Mirazita, M; Mokeev, V; Moutarde, H; Munevar, E; Nadel-Turonski, P; Nasseripour, R; Niccolai, S; Niculescu, G; Niculescu, I; Osipenko, M; Ostrovidov, A I; Paolone, M; Pappalardo, L; Paremuzyan, R; Anefalos Pereira, S; Pisano, S; Pogorelko, O; Pozdniakov, S; Procureur, S; Prok, Y; Protopopescu, D; Raue, B A; Ricco, G; Rimal, D; Ripani, M; Ritchie, B G; Rosner, G; Rossi, P; Sabatie, F; Saini, M S; Salgado, C; Schott, D; Schumacher, R A; Seraydaryan, H; Sharabian, Y G; Smith, E S; Smith, G D; Sober, D I; Sokhan, D; Stepanyan, S S; Stepanyan, S; Stoler, P; Strauch, S; Taiuti, M; Tang, W; Taylor, C E; Tkachenko, S; Vernarsky, B; Vineyard, M F; Vlassov, A V; Voskanyan, H; Voutier, E; Wood, M H; Zachariou, N; Zana, L; Zhao, B

    2012-03-23

    The CLAS detector was used to obtain the first ever measurement of the electromagnetic decay of the ?*+(1385) from the reaction ?p ? K0 ?*+(1385). A real photon beam with a maximum energy of 3.8 GeV was incident on a liquid-hydrogen target, resulting in the photoproduction of the kaon and ?* hyperon. Kinematic fitting was used to separate the reaction channel from the background processes. The fitting algorithm exploited a new method to kinematically fit neutrons in the CLAS detector, leading to the partial width measurement of 250.0 ± 56.9(stat)-41.2+34.3(sys) keV. A U-spin symmetry test using the SU(3) flavor-multiplet representation yields predictions for the ?*+(1385) ? ?+? and ?*0(1385) ? ?? partial widths that agree with the experimental measurements.

  13. Publisher's note: Branching ratios for the beta decay of Na-21 (vol 74, pg 015501, 2006) 

    E-Print Network [OSTI]

    Iacob, V. E.; Hardy, John C.; Gagliardi, Carl A.; Goodwin, J.; Nica, N.; Park, H. I.; Tabacaru, G.; Trache, L.; Tribble, Robert E.; Zhai, Y.; Towner, I. S.

    2006-01-01

    corrected as of 31 July 2006. The equations are correct in the printed version of the journal. 0556-2813/2006/74(2)/029901(1) 029901-1 2006 The American Physical Society ...

  14. Dissociative recombination cross section and branching ratios of protonated dimethyl disulfide and N-methylacetamide

    E-Print Network [OSTI]

    Simons, Jack

    , Sweden Received 30 April 2004; accepted 23 June 2004 Dimethyl disulfide DMDS and N protonated DMDS and protonated N-methylacetamide were determined at electron energies ranging from 0.001 to 0

  15. Microbial production of wax esters from highly branched alkanes

    DOE Patents [OSTI]

    Bogan, William W.; Sullivan, Wendy R.; Paterek, James R.

    2005-02-01

    A microbial culture and method for producing wax esters using highly branched alkanes. In accordance with one embodiment, the highly branched alkane is squalane.

  16. Ivey ING Leadership Centre, Toronto, February 19-21, 2013 1 CIFAR-OBI Neuroscience Accelerator workshop: Autism

    E-Print Network [OSTI]

    workshop: Autism Ivey ING Leadership Centre, Toronto, February 19-21, 2013 OnFebruary19-21,2013,CIFAR-longbraindisorder. SESSION I: AUTISM SPECTRUM DISORDER ­ OVERVIEW Session Chair: Sir Michael Rutter, King's College London: Autism spectrum disorder (ASD) is currently reported to occur in roughly 1% of the human population

  17. AC 2011-732: INTEGRATING NASA SCIENCE AND ENGINEERING: US-ING AN INNOVATIVE SOFTWARE CURRICULUM DELIVERY TOOL

    E-Print Network [OSTI]

    AC 2011-732: INTEGRATING NASA SCIENCE AND ENGINEERING: US- ING AN INNOVATIVE SOFTWARE CURRICULUM DELIVERY TOOL TO CREATE A NASA-BASED CURRICULUM Morgan M Hynes, Tufts University Elsa Head, Tufts;Integrating NASA Science and Engineering: Using an Innovative Software Curriculum Delivery Tool to Create

  18. AC 2011-2087: FIRST YEAR ENGINEERING STUDENTS ARE STRIK-INGLY IMPOVERISHED IN THEIR SELF-CONCEPT AS PROFESSIONAL

    E-Print Network [OSTI]

    Guilford, William

    AC 2011-2087: FIRST YEAR ENGINEERING STUDENTS ARE STRIK- INGLY IMPOVERISHED IN THEIR SELF-CONCEPT for education. Brian A Nosek, University of Virginia c American Society for Engineering Education, 2011 #12;First year engineering students are strikingly impoverished in their self-concept as professional

  19. The solar eclipse is indeed a momentous, or at least visually entertain-ing and curious happening in astrology.

    E-Print Network [OSTI]

    Little, John B.

    The solar eclipse is indeed a momentous, or at least visually entertain- ing and curious happening recordings of lunar and solar eclipses. 2 #12;The Dresden Codex was for the Mayans a way to predict eclipses likely that Martin Meinshausen proposed that this data was related to the timing of series of solar

  20. Measurements of the soot emissions and engine operat-ing parameters from a diesel engine during transient op-

    E-Print Network [OSTI]

    Daraio, Chiara

    ABSTRACT Measurements of the soot emissions and engine operat- ing parameters from a diesel engine and are the subject of future research. INTRODUCTION Soot emissions from diesel engines are well known to have gov- erning the emission of particles from diesel engines are becoming ever more stringent. The soot

  1. he application of rapid prototyping (RP) in fabricat-ing nonassembly robotic systems with inserts is pre-

    E-Print Network [OSTI]

    Mavroidis, Constantinos

    T he application of rapid prototyping (RP) in fabricat- ing nonassembly robotic systems with inserts is pre- sented in this article. The development of robotic systems that have all necessary of which are essential steps toward the future goal of automated (robotized) robot design and manufacturing

  2. Seismic technology will be of key importance for evaluat-ing gas-hydrate resources, particularly across the Gulf of

    E-Print Network [OSTI]

    Texas at Austin, University of

    Seismic technology will be of key importance for evaluat- ing gas-hydrate resources, particularly across the Gulf of Mexico (GoM) where many seismic surveys have been acquired and will continue to be acquired. To apply seismic technology to gas-hydrate studies in the gulf in an optimal manner

  3. lthough most people have a common understand-ing of what the Internet is, the expression Future

    E-Print Network [OSTI]

    lthough most people have a common understand- ing of what the Internet is, the expression Future Internet has different meanings depending essen- tially on the expectations about the future connec- tivity of the Internet, are com- plementary, each highlighting different aspects of the expect- ed future network

  4. Salary savings scheme 2011 (ING BANK) 11-10-2010 Personnel and Organization Department 1/1

    E-Print Network [OSTI]

    Franssen, Michael

    Salary savings scheme 2011 (ING BANK) 11-10-2010 Personnel and Organization Department 1!! The undersigned hereby declares not to participate in a "course-of-life" arrangement or a salary savings scheme-year and you can only participate in a salary savings scheme via one employer Alteration as of (enter date

  5. APPLYING CACHING TO TWO-LEVEL ADAPTIVE BRANCH PREDICTION

    E-Print Network [OSTI]

    Vintan, Lucian N.

    - 1 - APPLYING CACHING TO TWO-LEVEL ADAPTIVE BRANCH PREDICTION EGAN, C., STEVEN, G. B., SHIM, W of the Camera-ready paper. #12;- 2 - APPLYING CACHING TO TWO-LEVEL ADAPTIVE BRANCH PREDICTION ABSTRACT During the 1990s Two-level Adaptive Branch Predictors were developed to meet the requirement for accurate branch

  6. Optimal orientation in branched cytoskeletal networks

    E-Print Network [OSTI]

    D. A. Quint; J. M. Schwarz

    2011-02-22

    Actin cytoskeletal protrusions in crawling cells, or lamellipodia, exhibit various morphological properties such as two characteristic peaks in the distribution of filament orientation with respect to the leading edge. To understand these properties, using the dendritic nucleation model as a basis for cytoskeletal restructuring, a kinetic-population model with orientational-dependent branching (birth) and capping (death) is constructed and analyzed. Optimizing for growth yields a relation between the branch angle and filament orientation that explains the two characteristic peaks. The model also exhibits a subdominant population that allows for more accurate modeling of recent measurements of filamentous actin density along the leading edge of lamellipodia in keratocytes. Finally, we explore the relationship between orientational and spatial organization of filamentous actin in lamellipodia and address recent observations of a prevalence of overlapping filaments to branched filaments---a finding that is claimed to be in contradiction with the dendritic nucleation model.

  7. BUREAU OF COMMERCIAL BRANCH OF ECONOMICS

    E-Print Network [OSTI]

    REPORT to the BUREAU OF COMMERCIAL FISHERIES on the BRANCH OF ECONOMICS Circular 173 UNITED STATES TO T HE BUREAU O:B-' ~ OM 11~ I ( I \\L FISHERIES ON THE BRr\\. O F ECONOMIC by James Crutchfield (Chai r was formed by the Bureau of Commercial Fisheries to review its economic program. The members of the committee

  8. Measurement of the D -> pipi branching fractions

    E-Print Network [OSTI]

    Ammar, Raymond G.; Ball, S.; Baringer, Philip S.; Coppage, Don; Copty, N.; Davis, Robin E. P.; Hancock, N.; Kelly, M.; Kwak, Nowhan; Lam, H.

    1993-09-01

    Using data from CLEO II at the Cornell Electron Storage Ring we provide a new measurement of the branching fraction for D0 --> pi+pi-, and we present the first measurements of D0 --> pi0pi0 and of D+ --> pi+pi0, which is due to an isospin changing...

  9. Measurement of the Branching Fraction for J/?-> p \\bar{p}?and p \\bar{p} ?^{'}

    E-Print Network [OSTI]

    BES collaboration

    2009-02-20

    Using 58$\\times 10^{6}$ $\\jpsi$ events collected with the Beijing Spectrometer (BESII) at the Beijing Electron Positron Collider (BEPC), the branching fractions of $\\jpsi$ to $p\\bar{p}\\eta$ and $p\\bar{p}\\etap$ are determined. The ratio $\\frac{\\Gamma(\\jpsi\\rar\\ppb\\eta)}{\\Gamma(\\jpsi\\rar\\ppb)}$ obtained by this analysis agrees with expectations based on soft-pion theorem calculations.

  10. Extending Correlation in Branch Prediction Schemes Lucian N. VINTAN*)

    E-Print Network [OSTI]

    Vintan, Lucian N.

    . A classic Branch Target Cache (BTC) [Hen96] achieves these objectives by holding the following information to access the BTC in parallel with the normal instruction fetch process. As a result each branch

  11. Branch content of metallocene polyethylene Ramnath Ramachandran, Gregory Beaucage*

    E-Print Network [OSTI]

    Beaucage, Gregory

    Branch content of metallocene polyethylene Ramnath Ramachandran, Gregory Beaucage* and Amit catalyzed polyethylene (PE). A novel scaling approach is applied to determine the mole fraction branch solutions of metallocene polyethylene samples, to quantify the LCB content in polymers previously studied

  12. Biomechanical consequences of branching in flexible wave-swept macroalgae

    E-Print Network [OSTI]

    Martone, Patrick T.

    Biomechanical consequences of branching in flexible wave-swept macroalgae Samuel Starko1,2 *, Barry Key words: biomechanics, dislodgement, drag, evolution, hydrodynamics, intertidal, macroalgae. Branching has clear biomechanical consequences, increasing drag and the need for increased attachment

  13. Hawaii Department of Health Clean Water Branch | Open Energy...

    Open Energy Info (EERE)

    Clean Water Branch Jump to: navigation, search Name: Hawaii Department of Health Clean Water Branch Address: P.O. Box 3378 Place: Honolulu, Hawaii Zip: 96801 Website: hawaii.gov...

  14. Executive Branch Management Scorecard | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum12, 2015 InfographiclighbulbsDepartmentDeveloping11,Branch Management Scorecard

  15. Persistently laminar branched surfaces Ying-Qing Wu

    E-Print Network [OSTI]

    Wu, Ying-Qing

    Persistently laminar branched surfaces Ying-Qing Wu Abstract We define sink marks for branched that a non 2-bridge Mon- tesinos knot K has a persistently laminar branched surface unless it is equivalent that there are many persistently laminar tangles. 1 Introduction Essential lamination plays an important role

  16. Dendrimers and methods of preparing same through proportionate branching

    SciTech Connect (OSTI)

    Yu, Yihua; Yue, Xuyi

    2015-09-15

    The present invention provides for monodispersed dendrimers having a core, branches and periphery ends, wherein the number of branches increases exponentially from the core to the periphery end and the length of the branches increases exponentially from the periphery end to the core, thereby providing for attachment of chemical species at the periphery ends without exhibiting steric hindrance.

  17. Branching patterns emerge in a mathematical model of the dynamics of lung development

    E-Print Network [OSTI]

    2014-01-01

    313–324 Branching patterns emerge in a mathematical model ofcascades of branching events emerge naturally; the branchingof the branching plane, all emerge imme- diately from the

  18. Annual report, Basic Sciences Branch, FY 1991

    SciTech Connect (OSTI)

    Not Available

    1993-04-01

    This report summarizes the progress of the Basic Sciences Branch of the National Renewable Energy Laboratory (NREL) from October 1, 1990, through September 30, 1991. Seven technical sections of the report cover these main areas of NREL's in-house research: Semiconductor Crystal Growth, Amorphous Silicon Research, Polycrystalline Thin Films, III-V High-Efficiency Photovoltaic Cells, Solid-State Theory, Solid-State Spectroscopy, and Superconductivity. Each section explains the purpose and major accomplishments of the work in the context of the US Department of Energy's National Photovoltaic Research Program plans.

  19. Long Branch Capital | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View NewTexas:Montezuma, Arizona:Oregon: EnergyLloyd, NewBranch Capital Jump to: navigation, search

  20. High ratio recirculating gas compressor

    DOE Patents [OSTI]

    Weinbrecht, John F. (601 Oakwood Pl., NE., Albuquerque, NM 87123)

    1989-01-01

    A high ratio positive displacement recirculating rotary compressor is disclosed. The compressor includes an integral heat exchanger and recirculation conduits for returning cooled, high pressure discharge gas to the compressor housing to reducing heating of the compressor and enable higher pressure ratios to be sustained. The compressor features a recirculation system which results in continuous and uninterrupted flow of recirculation gas to the compressor with no direct leakage to either the discharge port or the intake port of the compressor, resulting in a capability of higher sustained pressure ratios without overheating of the compressor.

  1. High ratio recirculating gas compressor

    DOE Patents [OSTI]

    Weinbrecht, J.F.

    1989-08-22

    A high ratio positive displacement recirculating rotary compressor is disclosed. The compressor includes an integral heat exchanger and recirculation conduits for returning cooled, high pressure discharge gas to the compressor housing to reducing heating of the compressor and enable higher pressure ratios to be sustained. The compressor features a recirculation system which results in continuous and uninterrupted flow of recirculation gas to the compressor with no direct leakage to either the discharge port or the intake port of the compressor, resulting in a capability of higher sustained pressure ratios without overheating of the compressor. 10 figs.

  2. Defining the Termination of the Asymptotic Giant Branch

    E-Print Network [OSTI]

    Noam Soker

    2007-12-22

    I suggest a theoretical quantitative definition for the termination of the asymptotic giant branch (AGB) phase and the beginning of the post-AGB phase. I suggest that the transition will be taken to occur when the ratio of the dynamical time scale to the the envelope thermal time scale, Q, reaches its maximum value. Time average values are used for the different quantities, as the criterion does not refer to the short time-scale variations occurring on the AGB and post-AGB, e.g., thermal pulses (helium shell flashes) and magnetic activity. Along the entire AGB the value of Q increases, even when the star starts to contract. Only when a rapid contraction starts does the value of Q start to decrease. This criterion captures the essence of the transition from the AGB to the post AGB phase, because Q is connected to the stellar effective temperature, reaching its maximum value at T~4000-6000 K, it is related to the mass loss properties, and it reaches its maximum value when rapid contraction starts and envelope mass is very low.

  3. Fresh look at randomly branched polymers

    E-Print Network [OSTI]

    Hans-Karl Janssen; Olaf Stenull

    2009-11-09

    We develop a new, dynamical field theory of isotropic randomly branched polymers, and we use this model in conjunction with the renormalization group (RG) to study several prominent problems in the physics of these polymers. Our model provides an alternative vantage point to understand the swollen phase via dimensional reduction. We reveal a hidden Becchi-Rouet-Stora (BRS) symmetry of the model that describes the collapse ($\\theta$-)transition to compact polymer-conformations, and calculate the critical exponents to 2-loop order. It turns out that the long-standing 1-loop results for these exponents are not entirely correct. A runaway of the RG flow indicates that the so-called $\\theta^\\prime$-transition could be a fluctuation induced first order transition.

  4. Gauge Theories on the Coulomb branch

    E-Print Network [OSTI]

    John H. Schwarz

    2014-08-05

    We construct the world-volume action of a probe D3-brane in $AdS_5 \\times S^5$ with $N$ units of flux. It has the field content, symmetries, and dualities of the $U(1)$ factor of ${\\cal N} =4$ $U(N+1)$ super Yang--Mills theory, spontaneously broken to $U(N) \\times U(1)$ by being on the Coulomb branch, with the massive fields integrated out. This motivates the conjecture that it is the exact effective action, called a `highly effective action' (HEA). We construct an $SL(2,Z)$ multiplet of BPS soliton solutions of the D3-brane theory (the conjectured HEA) and show that it reproduces the electrically charged massive states that have been integrated out as well as magnetic monopoles and dyons. Their charges are uniformly spread on a spherical surface, called a `soliton bubble', which is interpreted as a phase boundary.

  5. Nucleosynthesis in asymptotic giant branch stars

    SciTech Connect (OSTI)

    El Eid, Mounib F., E-mail: meid@aub.edu.lb [American University of Beirut, Department of Physics, P.O. Box 11-0236, Riad El-Solh, Beirut (Lebanon)

    2014-05-09

    The nucleosynthesis in asymptotic giant branch stars (briefly: AGB)is a challenging and fascinating subject in the theory of stellar evolution and important for observations as well. This is because about of half the heavy elements beyond iron are synthesized during thermal pulsation phases of these stars. Furthermore, the understanding of the production of the heavy elements and some light elements like carbon and fluorine represent a powerful tool to get more insight into the internal structure of these stars. The diversity of nuclear processing during the AGB phases may also motivate experimental activities in measuring important nuclear reactions. In this contribution, we emphasize several interesting feature of the nucleosynthesis in AGB stars which still needs further elaboration especially from theoretical point of view.

  6. Statistical distributions of earthquake numbers: consequence of branching process

    E-Print Network [OSTI]

    Kagan, Yan Y

    2010-01-01

    in the study of the seismic process (with Comments by M. S.point branching process along the magnitude (or log seismic

  7. Mr. John Kinneman, Chief Nuclear Materfals Branch Nuclear Regulatory...

    Office of Legacy Management (LM)

    111989 Mr. John Kinneman, Chief Nuclear Materfals Branch Nuclear Regulatory Commission Region I 475 Allendale Road King of Prussia. Pennsylvania 19406 Dear Mr. Kinneman: -;' .-. 'W...

  8. Material development in the SI sub 3 N sub 4 system using glass encapsulated Hip'ing

    SciTech Connect (OSTI)

    Corbin, N.D.; Sundberg, G.J.; Siebein, K.N.; Willkens, C.A.; Pujari, V.K.; Rossi, G.A.; Hansen, J.S.; Chang, C.L.; Hammarstrom, J.L.

    1992-04-01

    This report covers a two-year program to develop fully dense Si{sub 3}N{sub 4} matrix SiC whisker composites with enhanced properties over monolithic Si{sub 3}N{sub 4} materials. The primary goal was to develop a composite with a fracture toughness > 10 MPa{radical}m, capable of using high pressure glass encapsulated HIP'ing. Coating methods were developed to apply thin (<150nm) stoichiometric BN layers to SiC whiskers and also to apply a dual coating of SiC over carbon to the whiskers. Fracture toughness of the composites was determined to increase as the quantity of whiskers (or elongated grains) with their axis perpendicular to the crack plane increased. Of the interface compositions evaluated in this effort, carbon was determined to be the most effective for increasing toughness. The highest toughnesses (6.8--7.0 MPa{radical}m) were obtained with uniaxially aligned carbon coated whiskers. There was no evidence of the carbon coating compromising the oxidation resistance of the composites at 1370{degree}C.

  9. Power-Aware Branch Prediction: Characterization and Design

    E-Print Network [OSTI]

    Huang, Wei

    Power-Aware Branch Prediction: Characterization and Design Dharmesh Parikh, Kevin Skadron, Yan-point benchmarks to explore the role of branch predictor organization in power/energy/performance tradeoffs's total power dissipation, prediction accuracy is nevertheless a powerful lever on processor behavior

  10. A STRATEGIC PLAN FOR HARBOR BRANCH OCEANOGRAPHIC INSTITUTE

    E-Print Network [OSTI]

    Marques, Oge

    A STRATEGIC PLAN FOR HARBOR BRANCH OCEANOGRAPHIC INSTITUTE AT FLORIDA ATLANTIC UNIVERSITY 2012­2017 RESEARCH, PARTNERSHIPS & STEWARDSHIP FOR THE FUTURE LIVING OCEANS OUR #12;CONTENTS About the Strategic Plan of Harbor Branch Resources............................................ 22 #12;1 ABOUT THE STRATEGIC PLAN

  11. Branch length distribution in TREF fractionated polyethylene Ramnath Ramachandran a

    E-Print Network [OSTI]

    Beaucage, Gregory

    Branch length distribution in TREF fractionated polyethylene Ramnath Ramachandran a , Gregory Keywords: Polyethylene Branching Neutron scattering a b s t r a c t Commercial polyethylene is typically and catalyst activity. Further, processing of polyethylene after polymerization may also result in changes

  12. HIDDEN SYMMETRIES OF CYCLIC BRANCHED COVERINGS OF 2-BRIDGE KNOTS

    E-Print Network [OSTI]

    HIDDEN SYMMETRIES OF CYCLIC BRANCHED COVERINGS OF 2-BRIDGE KNOTS MARCO RENI AND ANDREI VESNIN hyperbolic 3-manifolds Mn(K), which are n- fold cyclic branched coverings of 2-bridge knots K. We show the symmetry groups of knots and links (see [BZ], [Ka]). Particularly, the class of 2-bridge knots

  13. Radiolabeled dimethyl branched long chain fatty acid for heart imaging

    DOE Patents [OSTI]

    Knapp, Jr., Furn F. (Oak Ridge, TN); Goodman, Mark M. (Knoxville, TN); Kirsch, Gilbert (Woippy, FR)

    1988-08-16

    A radiolabeled long chain fatty acid for heart imaging that has dimethyl branching at one of the carbons of the chain which inhibits the extent to which oxidation can occur. The closer to the carboxyl the branching is positioned, the more limited the oxidation, thereby resulting in prolonged retention of the radiolabeled compound in the heart.

  14. Start Paint Branch Dr End 3501 University Blvd E

    E-Print Network [OSTI]

    Maryland at College Park, University of

    Start Paint Branch Dr End 3501 University Blvd E Hyattsville, MD 20783 Travel 1.3 mi ­ about 5 mins ©2008 Google - Map data ©2008 NAVTEQTM - Terms of Use Page 1 of 2Paint Branch Dr to 3501 University Blvd E, Hyattsville, MD 20783 - Google Maps 6/1/2008http://maps.google.com/maps?f=d&hl=en&geocode=&saddr=Paint

  15. FY 1992 Measurements and Characterization Branch annual report

    SciTech Connect (OSTI)

    Dippo, P.C

    1993-03-01

    The Measurements and Characterization Branch actively supports the advancement of DOE/NREL goals for the development and implementation of the solar photovoltaic (PV) technology. The primary focus of the laboratories is to provide state-of-the-art analytical capabilities for materials and device characterization and fabrication. The branch houses a comprehensive facility that Is capable of providing information on the full range of PV components. A major objective of the branch is to aggressively pursue collaborative research with other government laboratories, universities, and industrial firms for the advancement of Pv technologies. Members of the branch disseminate research findings to the technical community in publications and presentations. The Measurements and Characterization Branch encompasses seven coordinated research groups, providing integrated research and development that covers all aspects of photovoltaic materials/devices characterization.

  16. State-Set Branching: Leveraging BDDs for Heuristic Search

    E-Print Network [OSTI]

    Veloso, Manuela M.

    to be a powerful framework. The algorithms outperform the ordinary A* algorithm in almost all do- mains was supported in part by the Danish Research Agency and the United States Air Force under Grants Nos F30602 has been taken to verify systems with large state spaces. Instead of representing and manipulat- ing

  17. Searching for alternative solutions of an indeterminate reason-ing task is an important and necessary step in order to draw

    E-Print Network [OSTI]

    Abstract Searching for alternative solutions of an indeterminate reason- ing task is an important mental representations and processes of the search for alternatives in spatial reasoning, an experiment. The results showed that searching for alternative solutions can be best explained as a revision process

  18. Using EPR To Compare PEG-branch-nitroxide "Bivalent-Brush Polymers" and Traditional PEG Bottle-Brush Polymers: Branching

    E-Print Network [OSTI]

    Turro, Nicholas J.

    Using EPR To Compare PEG-branch-nitroxide "Bivalent-Brush Polymers" and Traditional PEG Bottle-Brush Polymers: Branching Makes a Difference Alan O. Burts, Yongjun Li, Aleksandr V. Zhukhovitskiy, Paresma R-brush random and block copolymers. Our results demonstrate that bivalent bottle-brush polymers have greater

  19. Cosmological Implications of He-3 Destruction on the Red Giant Branch

    E-Print Network [OSTI]

    Arnold I. Boothroyd; Robert A. Malaney

    1995-12-20

    Observations of stellar CNO isotope ratios indicate the presence of additional mixing processes on the red giant branch. An estimate of the resulting stellar He-3 depletion is made, as a function of stellar mass and metallicity. Based on stellar nucleosynthesis and galactic chemical evolution calculations, we determine the degree to which the destruction of He-3 due to such extra mixing processes can influence the inferred primordial abundance of ( D + He-3 ). We find that the extra mixing processes may increase the upper limit of the inferred primordial ( D + He-3 ) / H ratio by about 20%. The implications of this for baryonic dark matter bounds, and constraints on the relativistic degrees of freedom in the early universe, are discussed.

  20. Quantification of branching in model 3-arm star polyethylene Ramnath Ramachandran, Gregory Beaucage*

    E-Print Network [OSTI]

    Beaucage, Gregory

    1 Quantification of branching in model 3-arm star polyethylene Ramnath Ramachandran, Gregory-arm star polyethylene molecules is presented. Many commercial polyethylenes have long side branches-density polyethylene (LDPE) is typically a highly branched structure with broad distributions in branch content, branch

  1. Adsorption of annealed branched polymers on curved surfaces

    E-Print Network [OSTI]

    Wagner, Jef; Zandi, Roya

    2015-01-01

    The behavior of annealed branched polymers near adsorbing surfaces plays a fundamental role in many biological and industrial processes. Most importantly single stranded RNA in solution tends to fold up and self-bind to form a highly branched structure. Using a mean field theory, we both perturbatively and numerically examine the adsorption of branched polymers on surfaces of several different geometries in a good solvent. Independent of the geometry of the wall, we observe that as branching density increases, surface tension decreases. However, we find a coupling between the branching density and curvature in that a further lowering of surface tension occurs when the wall curves towards the polymer, but the amount of lowering of surface tension decreases when the wall curves away from the polymer. We find that for branched polymers confined into spherical cavities, most of branch-points are located in the vicinity of the interior wall and the surface tension is minimized for a critical cavity radius. For bra...

  2. Spatial Extent of Branching Brownian Motion

    E-Print Network [OSTI]

    Kabir Ramola; Satya N. Majumdar; Gregory Schehr

    2015-03-13

    We study the one dimensional branching Brownian motion starting at the origin and investigate the correlation between the rightmost ($X_{\\max}\\geq 0$) and leftmost ($X_{\\min} \\leq 0$) visited sites up to time $t$. At each time step the existing particles in the system either diffuse (with diffusion constant $D$), die (with rate $a$) or split into two particles (with rate $b$). We focus on the regime $b \\leq a$ where these two extreme values $X_{\\max}$ and $X_{\\min}$ are strongly correlated. We show that at large time $t$, the joint probability distribution function (PDF) of the two extreme points becomes stationary $P(X,Y,t \\to \\infty) \\to p(X,Y)$. Our exact results for $p(X,Y)$ demonstrate that the correlation between $X_{\\max}$ and $X_{\\min}$ is nonzero, even in the stationary state. From this joint PDF, we compute exactly the stationary PDF $p(\\zeta)$ of the (dimensionless) span $\\zeta = {(X_{\\max} - X_{\\min})}/{\\sqrt{D/b}}$, which is the distance between the rightmost and leftmost visited sites. This span distribution is characterized by a linear behavior ${p}(\\zeta) \\sim \\frac{1}{2} \\left(1 + \\Delta \\right) \\zeta$ for small spans, with $\\Delta = \\left(\\frac{a}{b} -1\\right)$. In the critical case ($\\Delta = 0$) this distribution has a non-trivial power law tail ${p}(\\zeta) \\sim 8 \\pi \\sqrt{3} /\\zeta^3$ for large spans. On the other hand, in the subcritical case ($\\Delta > 0$), we show that the span distribution decays exponentially as ${p}(\\zeta) \\sim (A^2/2) \\zeta \\exp \\left(- \\sqrt{\\Delta}~\\zeta\\right)$ for large spans, where $A$ is a non-trivial function of $\\Delta$ which we compute exactly. We show that these asymptotic behaviors carry the signatures of the correlation between $X_{\\max}$ and $X_{\\min}$. Finally we verify our results via direct Monte Carlo simulations.

  3. Measurement of branching fraction ratios and CP asymmetries in B →D0 CPK decays with the BABAR detector

    SciTech Connect (OSTI)

    Marchiori, Giovanni; /Pisa U.

    2010-05-05

    The primary goals of the BABAR experiment are the detection of CP violation (CPV) in the B meson system, the precise measurement of some of the elements of the CKM matrix and the measurement of the rates of rare B meson decays. At present, BABAR has achieved major successes: (1) the discovery, in neutral B decays, of direct and mixing-induced CP violation; (2) accurate measurements of the magnitudes of the CKM matrix elements |V{sub cb}| and |V{sub ub}|; (3) a precise measurement of the CKM parameter {beta} {triple_bond} arg[- V{sub cd}V*{sub cb}/V{sub td}V*{sub tb}]; (4) a first measurement of the CKM parameters {alpha} {triple_bond} arg[- V{sub td}V*{sub tb}/V{sub ud}V*{sub ub}], {gamma} {triple_bond} arg[- V{sub ud}V*{sub ub}/V{sub cd}V*{sub cb}]; and (5) the observation of several rare B decays and the discovery of new particles (in the charmed and charmonium mesons spectroscopy). However, the physics program of BABAR is not yet complete. Two of the key elements of this program that still need to be achieved are: (1) the observation of direct CP violation in charged B decays, which would constitute the first evidence of direct CPV in a charged meson decay; and (2) the precise measurement of {alpha} and {gamma}, which are necessary ingredients for a stringent test of the Standard Model predictions in the quark electroweak sector. A possibility for the discovery of direct CP violation in charged B decays would be the observation of a non-vanishing rate asymmetry in the Cabibbo-suppressed decay B{sup -} {yields} D{sup 0} K{sup -}, with the D{sup 0} decaying to either a CP-even or a CP-odd eigenstate. This class of decays can also provide theoretically-clean information on {gamma}.

  4. Envera Variable Compression Ratio Engine

    SciTech Connect (OSTI)

    Charles Mendler

    2011-03-15

    Aggressive engine downsizing, variable compression ratio and use of the Atkinson cycle are being combined to improve fuel economy by up to 40 percent relative to port fuel injected gasoline engines, while maintaining full engine power. Approach Engine downsizing is viewed by US and foreign automobile manufacturers as one of the best options for improving fuel economy. While this strategy has already demonstrated a degree of success, downsizing and fuel economy gains are currently limited. With new variable compression ratio technology however, the degree of engine downsizing and fuel economy improvement can be greatly increased. A small variable compression ratio (VCR) engine has the potential to return significantly higher vehicle fuel economy while also providing high power. Affordability and potential for near term commercialization are key attributes of the Envera VCR engine. VCR Technology To meet torque and power requirements, a smaller engine needs to do more work per stroke. This is typically accomplished by boosting the incoming charge with either a turbo or supercharger so that more energy is present in the cylinder per stroke to do the work. With current production engines the degree of engine boosting (which correlates to downsizing) is limited by detonation (combustion knock) at high boost levels. Additionally, the turbo or supercharger needs to be responsive and efficient while providing the needed boost. VCR technology eliminates the limitation of engine knock at high load levels by reducing compression ratio to {approx}9:1 (or whatever level is appropriate) when high boost pressures are needed. By reducing the compression ratio during high load demand periods there is increased volume in the cylinder at top dead center (TDC) which allows more charge (or energy) to be present in the cylinder without increasing the peak pressure. Cylinder pressure is thus kept below the level at which the engine would begin to knock. When loads on the engine are low the compression ratio can be raised (to as much as 18:1) providing high engine efficiency. It is important to recognize that for a well designed VCR engine cylinder pressure does not need to be higher than found in current production turbocharged engines. As such, there is no need for a stronger crankcase, bearings and other load bearing parts within the VCR engine. The Envera VCR mechanism uses an eccentric carrier approach to adjust engine compression ratio. The crankshaft main bearings are mounted in this eccentric carrier or 'crankshaft cradle' and pivoting the eccentric carrier 30 degrees adjusts compression ratio from 9:1 to 18:1. The eccentric carrier is made up of a casting that provides rigid support for the main bearings, and removable upper bearing caps. Oil feed to the main bearings transits through the bearing cap fastener sockets. The eccentric carrier design was chosen for its low cost and rigid support of the main bearings. A control shaft and connecting links are used to pivot the eccentric carrier. The control shaft mechanism features compression ratio lock-up at minimum and maximum compression ratio settings. The control shaft method of pivoting the eccentric carrier was selected due to its lock-up capability. The control shaft can be rotated by a hydraulic actuator or an electric motor. The engine shown in Figures 3 and 4 has a hydraulic actuator that was developed under the current program. In-line 4-cylinder engines are significantly less expensive than V engines because an entire cylinder head can be eliminated. The cost savings from eliminating cylinders and an entire cylinder head will notably offset the added cost of the VCR and supercharging. Replacing V6 and V8 engines with in-line VCR 4-cylinder engines will provide high fuel economy at low cost. Numerous enabling technologies exist which have the potential to increase engine efficiency. The greatest efficiency gains are realized when the right combination of advanced and new technologies are packaged together to provide the greatest gains at the least cost. Aggressive engine downsiz

  5. Establishment report: Reforestation of the Pen Branch corridor and delta

    SciTech Connect (OSTI)

    Nelson, E.A.; Dulohery, N.J.; Bunton, C.S.; Trettin, C.C.; McKee, W.H. Jr.

    1995-12-01

    This report documents the role of the USDA Forest Service in the reforestation of the Pen Branch floodplain and delta. The report focuses upon the reforestation activities and monitoring to characterize the sites.

  6. Dynamic Branch Prediction using Neural Networks Gordon Steven1

    E-Print Network [OSTI]

    Vintan, Lucian N.

    instructions to the processor pipeline. A classic Branch Target Cache (BTC) [1] achieves these objectives by using the PC address to access the BTC in parallel with the instruction fetch process. As a result each

  7. Covering Congress: Media Effects on Evaluations of the Legislative Branch 

    E-Print Network [OSTI]

    Johnson, Tyler

    2010-01-16

    This project takes an in-depth look at the role that media coverage of both individual members of Congress and Congress as a whole plays in shaping approval of legislators and the legislative branch. I argue that by examining ...

  8. Frobenius n-homomorphisms, transfers and branched coverings 

    E-Print Network [OSTI]

    Rees E.G.; Buchstaber V.M.

    2008-01-01

    The main purpose is to characterise continuous maps that are n-branched coverings in terms of induced maps on the rings of functions. The special properties of Frobenius nhomomorphisms between two function spaces that ...

  9. Briefing and Ancillary Materials for Rocky Branch Watershed Tour

    E-Print Network [OSTI]

    James, L. Allan

    1 Briefing and Ancillary Materials for Rocky Branch Watershed Tour Allan James This briefing available on the Water as a Resource, Geog 347, website: http://people.cas.sc.edu/ajames/347 Go to Ancillary

  10. eNgINeerINg g r A d U A T e P r O g r A M S

    E-Print Network [OSTI]

    Heller, Barbara

    IIT ArMOUr COllege Of eNgINeerINg g r A d U A T e P r O g r A M S Educating a nEw gEnEration of EnginEErs #12;A TrAdiTion of ExcEllEncE Armour College of Engineering was founded in 1893 as Armour Institute, dedicated to preparing students from all backgrounds for careers as engineers in a rapidly

  11. Variable ratio regenerative braking device

    DOE Patents [OSTI]

    Hoppie, Lyle O. (Birmingham, MI)

    1981-12-15

    Disclosed is a regenerative braking device (10) for an automotive vehicle. The device includes an energy storage assembly (12) having a plurality of rubber rollers (26, 28) mounted for rotation between an input shaft (36) and an output shaft (42), clutches (38, 46) and brakes (40, 48) associated with each shaft, and a continuously variable transmission (22) connectable to a vehicle drivetrain and to the input and output shafts by the respective clutches. The rubber rollers are torsionally stressed to accumulate energy from the vehicle when the input shaft is clutched to the transmission while the brake on the output shaft is applied, and are torsionally relaxed to deliver energy to the vehicle when the output shaft is clutched to the transmission while the brake on the input shaft is applied. The transmission ratio is varied to control the rate of energy accumulation and delivery for a given rotational speed of the vehicle drivetrain.

  12. Weather-Corrected Performance Ratio

    SciTech Connect (OSTI)

    Dierauf, T.; Growitz, A.; Kurtz, S.; Cruz, J. L. B.; Riley, E.; Hansen, C.

    2013-04-01

    Photovoltaic (PV) system performance depends on both the quality of the system and the weather. One simple way to communicate the system performance is to use the performance ratio (PR): the ratio of the electricity generated to the electricity that would have been generated if the plant consistently converted sunlight to electricity at the level expected from the DC nameplate rating. The annual system yield for flat-plate PV systems is estimated by the product of the annual insolation in the plane of the array, the nameplate rating of the system, and the PR, which provides an attractive way to estimate expected annual system yield. Unfortunately, the PR is, again, a function of both the PV system efficiency and the weather. If the PR is measured during the winter or during the summer, substantially different values may be obtained, making this metric insufficient to use as the basis for a performance guarantee when precise confidence intervals are required. This technical report defines a way to modify the PR calculation to neutralize biases that may be introduced by variations in the weather, while still reporting a PR that reflects the annual PR at that site given the project design and the project weather file. This resulting weather-corrected PR gives more consistent results throughout the year, enabling its use as a metric for performance guarantees while still retaining the familiarity this metric brings to the industry and the value of its use in predicting actual annual system yield. A testing protocol is also presented to illustrate the use of this new metric with the intent of providing a reference starting point for contractual content.

  13. FY 1991 Measurements and Characterization Branch annual report

    SciTech Connect (OSTI)

    Osterwald, C.R.; Dippo, P.C. [eds.

    1992-11-01

    The Measurements and Characterization Branch of the National Renewable Laboratory (NREL) provides comprehensive photovoltaic (PV) materials, devices, characterization, measurement, fabrication, modeling research, and support for the international PV research community, in the context of the US Department of Energy`s Photovoltaic Research Program goals. This report summarizes the progress of the Branch from 31 January 1991 through 31 January 1992. The eight technical sections present a succinct overview of the capabilities and accomplishments of each group in the Branch. The Branch is comprised of the following groups: Surface and interface Analysis; Materials Characterization; Device Development; Electro-optical Characterization; Advanced PV module Performance and Reliability Research; Cell Performance Characterization; Surface Interactions, Modification, and Stability; and FTIR Spectroscopic Research. The including measurements and tests of PV materials, cells, submodules, and modules. The report contains a comprehensive bibliography of 77 branch originated journal and conference publications, which were authored in collaboration with, or in support of, approximately 135 university, industrial, government, and in-house research groups.

  14. Subsea pipeline gets welded branch without halting flow

    SciTech Connect (OSTI)

    West, A.; Hutt, G.; Starsmore, R.

    1995-12-11

    In October 1994, a 16 in. welded branch was installed without interruption to production onto Wintershall Noordzee BV`s 36-in. gas pipeline from the K13-A platform in the Dutch sector of the North Sea to Den helder, The Netherlands. The procedure is the first successfully to combine hyperbaric welding and subsea hot tapping without interruption to production. Developers of new fields can now consider exporting product without interrupting existing production and through existing infrastructure even if no convenient tie-in locations exist. Unocal evaluated export options and established that the most attractive alternative was to export gas into the Wintershall 36-in. K13-A to Den Helder pipeline. Various options for installing a branch included the following: flooding the pipeline and installing a conventional tee; stopping production and installing a welded branch followed by hot tapping; and continuing production and installing a welded branch followed by hot tapping. The chosen scheme was to retrofit a subsea side-tap assembly. This was achieved by installation of a welded branch followed by hot tapping into the 36-in. pipeline. The paper describes location determination, schedules, onshore preparation, and offshore work.

  15. A Logistic Branching Process Alternative to the Wright-Fisher Model R. B. Campbell

    E-Print Network [OSTI]

    Campbell, Russell Bruce

    A Logistic Branching Process Alternative to the Wright-Fisher Model R. B. Campbell Department://www.math.uni.edu/campbell (319) 273-2447 Running head: Logistic Branching Process Keywords: Branching Process, Coalescent approximation to the Wright-Fisher model. A logistic branching process is introduced in order to limit

  16. Measurements of the Branching fractions for $B_(s) -> D_(s)???$ and $?_b^0 -> ?_c^+???$

    E-Print Network [OSTI]

    LHCb Collaboration; R. Aaij; B. Adeva; M. Adinolfi; C. Adrover; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; G. Alkhazov; P. Alvarez Cartelle; A. A. Alves Jr; S. Amato; Y. Amhis; J. Anderson; R. B. Appleby; O. Aquines Gutierrez; F. Archilli; L. Arrabito; A. Artamonov; M. Artuso; E. Aslanides; G. Auriemma; S. Bachmann; J. J. Back; D. S. Bailey; V. Balagura; W. Baldini; R. J. Barlow; C. Barschel; S. Barsuk; W. Barter; A. Bates; C. Bauer; Th. Bauer; A. Bay; I. Bediaga; K. Belous; I. Belyaev; E. Ben-Haim; M. Benayoun; G. Bencivenni; S. Benson; J. Benton; R. Bernet; M. -O. Bettler; M. van Beuzekom; A. Bien; S. Bifani; A. Bizzeti; P. M. Bjørnstad; T. Blake; F. Blanc; C. Blanks; J. Blouw; S. Blusk; A. Bobrov; V. Bocci; A. Bondar; N. Bondar; W. Bonivento; S. Borghi; A. Borgia; T. J. V. Bowcock; C. Bozzi; T. Brambach; J. van den Brand; J. Bressieux; D. Brett; S. Brisbane; M. Britsch; T. Britton; N. H. Brook; H. Brown; A. Büchler-Germann; I. Burducea; A. Bursche; J. Buytaert; S. Cadeddu; J. M. Caicedo Carvajal; O. Callot; M. Calvi; M. Calvo Gomez; A. Camboni; P. Campana; A. Carbone; G. Carboni; R. Cardinale; A. Cardini; L. Carson; K. Carvalho Akiba; G. Casse; M. Cattaneo; M. Charles; Ph. Charpentier; N. Chiapolini; K. Ciba; X. Cid Vidal; G. Ciezarek; P. E. L. Clarke; M. Clemencic; H. V. Cliff; J. Closier; C. Coca; V. Coco; J. Cogan; P. Collins; F. Constantin; G. Conti; A. Contu; A. Cook; M. Coombes; G. Corti; G. A. Cowan; R. Currie; B. D'Almagne; C. D'Ambrosio; P. David; I. De Bonis; S. De Capua; M. De Cian; F. De Lorenzi; J. M. De Miranda; L. De Paula; P. De Simone; D. Decamp; M. Deckenhoff; H. Degaudenzi; M. Deissenroth; L. Del Buono; C. Deplano; O. Deschamps; F. Dettori; J. Dickens; H. Dijkstra; P. Diniz Batista; S. Donleavy; A. Dosil Suárez; D. Dossett; A. Dovbnya; F. Dupertuis; R. Dzhelyadin; C. Eames; S. Easo; U. Egede; V. Egorychev; S. Eidelman; D. van Eijk; F. Eisele; S. Eisenhardt; R. Ekelhof; L. Eklund; Ch. Elsasser; D. G. d'Enterria; D. Esperante Pereira; L. Estéve; A. Falabella; E. Fanchini; C. Färber; G. Fardell; C. Farinelli; S. Farry; V. Fave; V. Fernandez Albor; M. Ferro-Luzzi; S. Filippov; C. Fitzpatrick; M. Fontana; F. Fontanelli; R. Forty; M. Frank; C. Frei; M. Frosini; S. Furcas; A. Gallas Torreira; D. Galli; M. Gandelman; P. Gandini; Y. Gao; J-C. Garnier; J. Garofoli; J. Garra Tico; L. Garrido; C. Gaspar; N. Gauvin; M. Gersabeck; T. Gershon; Ph. Ghez; V. Gibson; V. V. Gligorov; C. Göbel; D. Golubkov; A. Golutvin; A. Gomes; H. Gordon; M. Grabalosa Gándara; R. Graciani Diaz; L. A. Granado Cardoso; E. Graugés; G. Graziani; A. Grecu; S. Gregson; B. Gui; E. Gushchin; Yu. Guz; T. Gys; G. Haefeli; C. Haen; S. C. Haines; T. Hampson; S. Hansmann-Menzemer; R. Harji; N. Harnew; J. Harrison; P. F. Harrison; J. He; V. Heijne; K. Hennessy; P. Henrard; J. A. Hernando Morata; E. van Herwijnen; E. Hicks; W. Hofmann; K. Holubyev; P. Hopchev; W. Hulsbergen; P. Hunt; T. Huse; R. S. Huston; D. Hutchcroft; D. Hynds; V. Iakovenko; P. Ilten; J. Imong; R. Jacobsson; A. Jaeger; M. Jahjah Hussein; E. Jans; F. Jansen; P. Jaton; B. Jean-Marie; F. Jing; M. John; D. Johnson; C. R. Jones; B. Jost; S. Kandybei; M. Karacson; T. M. Karbach; J. Keaveney; U. Kerzel; T. Ketel; A. Keune; B. Khanji; Y. M. Kim; M. Knecht; S. Koblitz; P. Koppenburg; A. Kozlinskiy; L. Kravchuk; K. Kreplin; M. Kreps; G. Krocker; P. Krokovny; F. Kruse; K. Kruzelecki; M. Kucharczyk; S. Kukulak; R. Kumar; T. Kvaratskheliya; V. N. La Thi; D. Lacarrere; G. Lafferty; A. Lai; D. Lambert; R. W. Lambert; E. Lanciotti; G. Lanfranchi; C. Langenbruch; T. Latham; R. Le Gac; J. van Leerdam; J. -P. Lees; R. Lefévre; A. Leflat; J. Lefrançois; O. Leroy; T. Lesiak; L. Li; L. Li Gioi; M. Lieng; M. Liles; R. Lindner; C. Linn; B. Liu; G. Liu; J. H. Lopes; E. Lopez Asamar; N. Lopez-March; J. Luisier; F. Machefert; I. V. Machikhiliyan; F. Maciuc; O. Maev; J. Magnin; S. Malde; R. M. D. Mamunur; G. Manca; G. Mancinelli; N. Mangiafave; U. Marconi; R. Märki; J. Marks; G. Martellotti; A. Martens; L. Martin; A. Martín Sánchez; D. Martinez Santos; A. Massafferri; Z. Mathe; C. Matteuzzi; M. Matveev; E. Maurice; B. Maynard; A. Mazurov; G. McGregor; R. McNulty; C. Mclean; M. Meissner; M. Merk; J. Merkel; R. Messi; S. Miglioranzi; D. A. Milanes; M. -N. Minard; S. Monteil; D. Moran; P. Morawski; R. Mountain; I. Mous; F. Muheim; K. Müller; R. Muresan; B. Muryn; M. Musy; J. Mylroie-Smith; P. Naik; T. Nakada; R. Nandakumar; J. Nardulli; I. Nasteva; M. Nedos; M. Needham; N. Neufeld; C. Nguyen-Mau; M. Nicol; S. Nies; V. Niess; N. Nikitin; A. Oblakowska-Mucha; V. Obraztsov; S. Oggero; S. Ogilvy; O. Okhrimenko; R. Oldeman; M. Orlandea; J. M. Otalora Goicochea; P. Owen; B. Pal; J. Palacios; M. Palutan; J. Panman; A. Papanestis; M. Pappagallo; C. Parkes; C. J. Parkinson; G. Passaleva; G. D. Patel; M. Patel; S. K. Paterson

    2011-09-30

    Branching fractions of the decays $H_b\\to H_c\\pi^-\\pi^+\\pi^-$ relative to $H_b\\to H_c\\pi^-$ are presented, where $H_b$ ($H_c$) represents B^0-bar($D^+$), $B^-$ ($D^0$), B_s^0-bar ($D_s^+$) and $\\Lambda_b^0$ ($\\Lambda_c^+$). The measurements are performed with the LHCb detector using 35${\\rm pb^{-1}}$ of data collected at $\\sqrt{s}=7$ TeV. The ratios of branching fractions are measured to be B(B^0-bar -> D^+\\pi^-\\pi^+\\pi^-)/ B(B^0-bar -> D^+\\pi^-) = 2.38\\pm0.11\\pm0.21 B(B^- -> D^0\\pi^-\\pi^+\\pi^-) / B(B^- -> D^0\\pi^-) = 1.27\\pm0.06\\pm0.11 B(B_s^0-bar -> D_s^+\\pi^-\\pi^+\\pi^-) / B(B_s^0-bar -> D_s^+\\pi^-) = 2.01\\pm0.37\\pm0.20 B(\\Lambda_b^0->\\Lambda_c^+\\pi^-\\pi^+\\pi^-) / B(\\Lambda_b^0 -> \\Lambda_c^+\\pi^-) = 1.43\\pm0.16\\pm0.13. We also report measurements of partial decay rates of these decays to excited charm hadrons. These results are of comparable or higher precision than existing measurements.

  17. Renormalized field theory of collapsing directed randomly branched polymers

    E-Print Network [OSTI]

    Hans-Karl Janssen; Frank Wevelsiep; Olaf Stenull

    2009-10-01

    We present a dynamical field theory for directed randomly branched polymers and in particular their collapse transition. We develop a phenomenological model in the form of a stochastic response functional that allows us to address several interesting problems such as the scaling behavior of the swollen phase and the collapse transition. For the swollen phase, we find that by choosing model parameters appropriately, our stochastic functional reduces to the one describing the relaxation dynamics near the Yang-Lee singularity edge. This corroborates that the scaling behavior of swollen branched polymers is governed by the Yang-Lee universality class as has been known for a long time. The main focus of our paper lies on the collapse transition of directed branched polymers. We show to arbitrary order in renormalized perturbation theory with $\\varepsilon$-expansion that this transition belongs to the same universality class as directed percolation.

  18. Measurements of the branching fractions and CP-asymmetries of B- --> D0_(CP) K- decays

    E-Print Network [OSTI]

    The BABAR Collaboration; B. Aubert

    2005-12-25

    We present a study of the decay B- --> D0_(CP) K- and its charge conjugate, where D0_(CP) is reconstructed in CP-even, CP-odd, and non-CP flavor eigenstates, based on a sample of 232 million Y(4S) --> B Bbar decays collected with the BABAR detector at the PEP-II e+e- storage ring. We measure the partial-rate charge asymmetries A_CP+, A_CP- and the ratios R_CP+, R_CP- of the B --> D0 K decay branching fractions as measured in CP+, CP-, and non-CP D0 decays: A_CP+ = 0.35 +/- 0.13 (stat) +/- 0.04 (syst) A_CP- = -0.06 +/- 0.13 (stat) +/- 0.04 (syst) R_CP+ = 0.90 +/- 0.12 (stat) +/- 0.04 (syst) R_CP- = 0.86 +/- 0.10 (stat) +/- 0.05 (syst)

  19. Dimensions and aspect ratios of natural ice crystals

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Um, J.; McFarquhar, G. M.; Hong, Y. P.; Lee, S. -S.; Jung, C. H.; Lawson, R. P.; Mo, Q.

    2014-12-10

    During the 2006 Tropical Warm Pool International Cloud Experiment (TWP-ICE) in the Tropics, the 2008 Indirect and Semi-Direct Aerosol Campaign (ISDAC) in the Arctic, and the 2010 Small PARTicles In CirrUS (SPARTICUS) campaign in mid-latitudes, high-resolution images of ice crystals were recorded by a Cloud Particle Imager at temperatures (T) between -87 and 0 °C. The projected maximum dimension (D'), length (L'), and width (W') of pristine columns, plates, and component bullets of bullet rosettes were measured using newly developed software, the Ice Crystal Ruler. The number of bullets in each bullet rosette was also measured. Column crystals were furthermore »distinguished as either horizontally oriented columns or columns with other orientations to eliminate any orientation effect on the measured dimensions. Dimensions and aspect ratios (AR, dimension of major axis divided by dimension of minor axis) of crystals were determined as functions of temperature, geophysical location, and type of cirrus. Dimensions of crystals generally increased as temperature increased. Columns and bullets had larger dimensions (i.e., W') of the minor axis (i.e., a axis) for a given dimension (i.e., D' or L') of the major axis (i.e., c axis), and thus smaller AR, as T increased, whereas this trend did not occur for plate crystals. The average number of branches in bullet rosettes was 5.50±1.35 during three campaigns and 6.32±1.34 (5.46±1.34; 4.95±1.01) during TWP-ICE (SPARTICUS; ISDAC). The AR of bullets increased with the number of branches in bullet rosettes. Most dimensions of crystals and ARs of columnar crystals measured during SPARTICUS were larger than those measured during TWP-ICE and ISDAC at ?67 T T L–W relationships of columns derived using current data exhibited a strong dependence on temperature; similar relationship determined in previous studies were within the range of the current data.« less

  20. Vere-Jones' self-similar branching model

    SciTech Connect (OSTI)

    Saichev, A. [Mathematical Department, Nizhny Novgorod State University, Gagarin prosp. 23, Nizhny Novgorod, 603950 (Russian Federation); Institute of Geophysics and Planetary Physics, University of California, Los Angeles, California 90095 (United States); Sornette, D. [Institute of Geophysics and Planetary Physics and Department of Earth and Space Sciences, University of California, Los Angeles, California 90095 (United States); Laboratoire de Physique de la Matiere Condensee, CNRS UMR 6622 and Universitee de Nice-Sophia Antipolis, 06108 Nice Cedex 2 (France)

    2005-11-01

    Motivated by its potential application to earthquake statistics as well as for its intrinsic interest in the theory of branching processes, we study the exactly self-similar branching process introduced recently by Vere-Jones. This model extends the ETAS class of conditional self-excited branching point-processes of triggered seismicity by removing the problematic need for a minimum (as well as maximum) earthquake size. To make the theory convergent without the need for the usual ultraviolet and infrared cutoffs, the distribution of magnitudes m{sup '} of daughters of first-generation of a mother of magnitude m has two branches m{sup '}m with exponent {beta}+d, where {beta} and d are two positive parameters. We investigate the condition and nature of the subcritical, critical, and supercritical regime in this and in an extended version interpolating smoothly between several models. We predict that the distribution of magnitudes of events triggered by a mother of magnitude m over all generations has also two branches m{sup '}m with exponent {beta}+h, with h=d{radical}(1-s), where s is the fraction of triggered events. This corresponds to a renormalization of the exponent d into h by the hierarchy of successive generations of triggered events. For a significant part of the parameter space, the distribution of magnitudes over a full catalog summed over an average steady flow of spontaneous sources (immigrants) reproduces the distribution of the spontaneous sources with a single branch and is blind to the exponents {beta},d of the distribution of triggered events. Since the distribution of earthquake magnitudes is usually obtained with catalogs including many sequences, we conclude that the two branches of the distribution of aftershocks are not directly observable and the model is compatible with real seismic catalogs. In summary, the exactly self-similar Vere-Jones model provides an attractive new approach to model triggered seismicity, which alleviates delicate questions on the role of magnitude cutoffs in other non-self-similar models. The new prediction concerning two branches in the distribution of magnitudes of aftershocks could be tested with recently introduced stochastic reconstruction methods, tailored to disentangle the different triggered sequences.

  1. Branching fraction and photon energy spectrum for b -> s gamma

    E-Print Network [OSTI]

    Ammar, Raymond G.; Bean, Alice; Besson, David Zeke; Zhao, X.

    2001-12-01

    We have measured the branching fraction and photon energy spectrum for the radiative penguin process b --> s gamma. We find B(b --> s gamma) = (3.21 +/- 0.43 +/- 0.27(-0.10)(+0.18)) x 10(-4), where the errors are statistical, ...

  2. Branching of negative streamers in free flight Andrea Rocco,1

    E-Print Network [OSTI]

    Ebert, Ute

    and rapidly growing channels of high ionization penetrating a region of low or vanishing ionization under over the full streamer head. Branching then would occur due to randomly distributed ionization ava of the streamer is concentrated in a thin layer around the head rather than being smeared out over the full head

  3. Levy processes and continuous-state branching processes: part I

    E-Print Network [OSTI]

    L´evy processes and continuous-state branching processes: part I Andreas E. Kyprianou, Department motion has continuous paths whereas a Poisson process does not. Secondly, a Poisson process is a non another, we see that they also have a lot in common. Both processes have right continuous paths with left

  4. The Polymerase Chain Reaction and Branching Processes Fengzhu Sun

    E-Print Network [OSTI]

    Sun, Fengzhu - Sun, Fengzhu

    The Polymerase Chain Reaction and Branching Processes Fengzhu Sun Department of Mathematics, DRB is studied. We also study the distribution of the Hamming distance between two randomly chosen sequences long. The double-stranded DNA molecules are heated to near boiling temperature so that the double

  5. PICO: An Object-Oriented Framework for Branch and Bound

    SciTech Connect (OSTI)

    ECKSTEIN,JONATHAN; HART,WILLIAM E.; PHILLIPS,CYNTHIA A.

    2000-12-01

    This report describes the design of PICO, a C++ framework for implementing general parallel branch-and-bound algorithms. The PICO framework provides a mechanism for the efficient implementation of a wide range of branch-and-bound methods on an equally wide range of parallel computing platforms. We first discuss the basic architecture of PICO, including the application class hierarchy and the package's serial and parallel layers. We next describe the design of the serial layer, and its central notion of manipulating subproblem states. Then, we discuss the design of the parallel layer, which includes flexible processor clustering and communication rates, various load balancing mechanisms, and a non-preemptive task scheduler running on each processor. We describe the application of the package to a branch-and-bound method for mixed integer programming, along with computational results on the ASCI Red massively parallel computer. Finally we describe the application of the branch-and-bound mixed-integer programming code to a resource constrained project scheduling problem for Pantex.

  6. RUSSIAN ACADEMY OF SCIENCE Lenin Order of Siberian Branch

    E-Print Network [OSTI]

    Smaluk, Victor

    is important to know the energy spread contribution into the total systematic error. Information aboutRUSSIAN ACADEMY OF SCIENCE Lenin Order of Siberian Branch G.I. Budker INSTITUTE OF NUCLEAR PHYSICS V.A. Kiselev, N.Yu. Muchnoi, O.I. Meshkov, V.V. Smaluk, V.N. Zhilich, A.N. Zhuravlev BEAM ENERGY

  7. The branching process with logistic growth By Amaury Lambert

    E-Print Network [OSTI]

    Lambert, Amaury

    in ecology, and translates mathematically into a quadratic death rate. The logistic branching process, or LB) combined with constant coagulation rate (the death rate is proportional to the number of possible, the first birth will arrive at rate n and the first death at rate dn+cn(n-1). This size-dependence complies

  8. Convergence in gradient systems with branching of equilibria

    SciTech Connect (OSTI)

    Galaktionov, V A [University of Bath (United Kingdom); Pohozaev, Stanislav I [Steklov Mathematical Institute, Russian Academy of Sciences (Russian Federation); Shishkov, A E [Institute of Applied Mathematics and Mechanics of the National Academy of Sciences of Ukraine, Donetsk (Ukraine)

    2007-06-30

    The basic model is a semilinear elliptic equation with coercive C{sup 1} non-linearity: {delta}{psi}+f({psi})=0 in {omega}, {psi}=0 on {partial_derivative}{omega}, where {omega} subset of R{sup N} is a bounded smooth domain. The main hypothesis (H{sub R}) about resonance branching is as follows: if a branching of equilibria occurs at a point {psi} with k-dimensional kernel of the linearized operator {delta}+f'({psi})I, then the branching subset S{sub k} at {psi} is a locally smooth k-dimensional manifold. For N=1 the first result on the stabilization to a single equilibrium is due to Zelenyak (1968). It is shown that Zelenyak's approach, which is based on the analysis of Lyapunov functions, can be extended to general gradient systems in Hilbert spaces with smooth resonance branching. The case of asymptotically small non-autonomous perturbations of such systems is also considered. The approach developed here represents an alternative to Hale's stabilization method (1992) and other similar techniques in the theory of gradient systems. Bibliography: 32 titles.

  9. Power Grid Verification Using Node and Branch Nahi Abdul Ghani

    E-Print Network [OSTI]

    Najm, Farid N.

    conservative and tight LP. Results show a dramatic reduction in the number of LPs thus making vectorless grid-case voltage drops which, in turn, entails the solution of as many linear programs (LPs) as there are nodes among node voltage drops and among branch currents. This allows us to replace a group of LPs by one

  10. Continuum Cascade Model: Branching Random Walk for Traveling Wave

    E-Print Network [OSTI]

    Yoshiaki Itoh

    2015-07-15

    The food web is a directed graph in which nodes label species and directed links represent the predation between species. Cascade models generate random food webs. The recursion to obtain the probability distribution of the longest chain length has the solution with traveling wave. We consider a branching random walk to study the asymptotic probability on the wave front.

  11. Eccentric crank variable compression ratio mechanism

    DOE Patents [OSTI]

    Lawrence, Keith Edward (Kobe, JP); Moser, William Elliott (Peoria, IL); Roozenboom, Stephan Donald (Washington, IL); Knox, Kevin Jay (Peoria, IL)

    2008-05-13

    A variable compression ratio mechanism for an internal combustion engine that has an engine block and a crankshaft is disclosed. The variable compression ratio mechanism has a plurality of eccentric disks configured to support the crankshaft. Each of the plurality of eccentric disks has at least one cylindrical portion annularly surrounded by the engine block. The variable compression ratio mechanism also has at least one actuator configured to rotate the plurality of eccentric disks.

  12. Abundance Ratios in Early-Type Galaxies

    E-Print Network [OSTI]

    Reynier Peletier

    1999-04-21

    Although evidence is accumulating that abundance ratios in galaxies are often non-solar, they are far from understood. I resume the current evidence for non-solar abundance ratios, supplementing the recent review by Worthey (1998) with some new results. It appears that the Mg/Fe abundance ratio only depends on the mass of the galaxy, not on the formation time-scale. For massive galaxies [Mg/Fe] > 0, while small galaxies show solar abundance ratios. Information about abundances of other element is scarce, but new evidence is given that [Ca/Fe] is solar, or slightly lower than solar, contrary to what is expected for an alpha-element.

  13. Ratio model serves suprathreshold color luminance discrimination

    E-Print Network [OSTI]

    Mullen, Kathy T.

    Ratio model serves suprathreshold color­ luminance discrimination Marcel J. Sankeralli and Kathy T the responses of the three postreceptoral mechanisms are combined to subserve discrimination of suprathreshold model of suprathreshold color­luminance dis- crimination, in which discrimination depends on a ratio

  14. Thermal photons to dileptons ratio at LHC

    E-Print Network [OSTI]

    Jajati K. Nayak; Jan-e Alam; Sourav Sarkar; Bikash Sinha

    2007-05-24

    It is shown that the ratio of transverse momentum (p_T) distribution of thermal photons to dileptons produced in heavy ion collisions reaches a plateau above p_T=1 GeV. We argue that the value of the ratio in the plateau region can be used to estimate the initial temperature.

  15. Controlled synthesis of hyper-branched inorganic nanocrystals with rich three-dimensional structures

    E-Print Network [OSTI]

    Kanaras, Antonios G.; Sonnichsen, Carsten; Liu, Haitao; Alivisatos, A. Paul

    2005-01-01

    Figure 1. Three-dimensional structure of the hyper-branchedhyper-branched inorganic nanocrystals with rich three-dimensionalhyper- branched particles not only extend the available three-dimensional

  16. Revised Final Independent External Peer Review Report for the East Branch Dam, Clarion River,

    E-Print Network [OSTI]

    US Army Corps of Engineers

    Revised Final Independent External Peer Review Report for the East Branch Dam, Clarion River, Elk County, Pennsylvania: Dam Safety Modification Report Prepared by Battelle Memorial Institute Prepared Report East Branch Dam, Clarion River, Elk County, Pennsylvania: Dam Safety Modification Report

  17. Towards a consistent description of in-medium parton branching

    E-Print Network [OSTI]

    Apolinário, Liliana; Milhano, Guilherme; Salgado, Carlos A

    2015-01-01

    Ultra-relativistic heavy-ion collisions are a window of opportunity to study QCD matter under extreme conditions of temperature and density, such as the quark-gluon plasma. Among the several possibilities, the study of jet quenching - generic name given to in-medium energy loss modifications of the parton branching - is a powerful tool to assess the properties of this new state of matter. The description of the parton shower is very well understood in vacuum (controlled reference) and medium-induced modifications of this process can be experimentally accessed through jet measurements. Current experimental data, however, cannot be entirely described only with energy loss phenomena. Transverse momentum broadening and decoherence effects, both theoretically established by now, and their interplay are essential to build a consistent picture of the medium-modifications of the parton branching and to achieve a correct description of the current experimental data. In this write-up, we will present the latest develop...

  18. Branch dependence in the "consistent histories" approach to quantum mechanics

    E-Print Network [OSTI]

    Thomas Müller

    2006-11-12

    In the consistent histories formalism one specifies a family of histories as an exhaustive set of pairwise exclusive descriptions of the dynamics of a quantum system. We define branching families of histories, which strike a middle ground between the two available mathematically precise definitions of families of histories, viz., product families and Isham's history projector operator formalism. The former are too narrow for applications, and the latter's generality comes at a certain cost, barring an intuitive reading of the ``histories''. Branching families retain the intuitiveness of product families, they allow for the interpretation of a history's weight as a probability, and they allow one to distinguish two kinds of coarse-graining, leading to reconsidering the motivation for the consistency condition.

  19. The genealogy of branching Brownian motion with absorption

    E-Print Network [OSTI]

    Berestycki, Julien; Schweinsberg, Jason

    2010-01-01

    We consider a system of particles which perform branching Brownian motion with negative drift and are killed upon reaching zero, in the near-critical regime where the total population stays roughly constant with approximately N particles. We show that the characteristic time scale for the evolution of this population is of order (log N)^3, in the sense that when time is measured in these units, the scaled number of particles converges to a variant of Neveu's continuous-state branching process. Furthermore, the genealogy of the particles is then governed by a coalescent process known as the Bolthausen-Sznitman coalescent. This validates the non-rigorous predictions by Brunet, Derrida, Muller, and Munier for a closely related model.

  20. The genealogy of extremal particles of Branching Brownian Motion

    E-Print Network [OSTI]

    Arguin, Louis-Pierre; Kistler, Nicola

    2010-01-01

    Branching Brownian Motion describes a system of particles which diffuse in space and split into offsprings according to a certain random mechanism. In virtue of the groundbreaking work by M. Bramson on the convergence of solutions of the Fisher-KPP equation to traveling waves, the law of the rightmost particle in the limit of large times is rather well understood. In this work, we address the full statistics of the extremal particles (first-, second-, third- etc. largest). In particular, we prove that in the large $t-$limit, such particles descend with overwhelming probability from ancestors having split either within a distance of order one from time $0$, or within a distance of order one from time $t$. The approach relies on characterizing, up to a certain level of precision, the paths of the extremal particles. As a byproduct, a heuristic picture of Branching Brownian Motion ``at the edge'' emerges, which sheds light on the still unknown limiting extremal process.

  1. The genealogy of branching Brownian motion with absorption

    E-Print Network [OSTI]

    Julien Berestycki; Nathanaël Berestycki; Jason Schweinsberg

    2013-03-14

    We consider a system of particles which perform branching Brownian motion with negative drift and are killed upon reaching zero, in the near-critical regime where the total population stays roughly constant with approximately N particles. We show that the characteristic time scale for the evolution of this population is of order $(\\log N)^3$, in the sense that when time is measured in these units, the scaled number of particles converges to a variant of Neveu's continuous-state branching process. Furthermore, the genealogy of the particles is then governed by a coalescent process known as the Bolthausen-Sznitman coalescent. This validates the nonrigorous predictions by Brunet, Derrida, Muller and Munier for a closely related model.

  2. Relevance of complex branch points for partial wave analysis

    SciTech Connect (OSTI)

    Ceci, S.; Svarc, A.; Doering, M.; Hanhart, C.; Krewald, S.; Meissner, U.-G.

    2011-07-15

    A central issue in hadron spectroscopy is to deduce--and interpret--resonance parameters, namely, pole positions and residues, from experimental data, for those are the quantities to be compared to lattice QCD or model calculations. However, not every structure in the observables derives from a resonance pole: the origin might as well be branch points, either located on the real axis (when a new channel composed of stable particles opens) or in the complex plane (when at least one of the intermediate particles is unstable). In this paper we demonstrate first the existence of such branch points in the complex plane and then show on the example of the {pi}N P{sub 11} partial wave that it is not possible to distinguish the structures induced by the latter from a true pole signal based on elastic data alone.

  3. High Transformer ratios in collinear wakefield accelerators.

    SciTech Connect (OSTI)

    Power, J. G.; Conde, M.; Yusof, Z.; Gai, W.; Jing, C.; Kanreykin, A.; Schoessow, P.; High Energy Physics; Euclid Techlabs, LLC

    2008-01-01

    Based on our previous experiment that successfully demonstrated wakefield transformer ratio enhancement in a 13.625 GHz dielectric-loaded collinear wakefield accelerator using the ramped bunch train technique, we present here a redesigned experimental scheme for even higher enhancement of the efficiency of this accelerator. Design of a collinear wakefield device with a transformer ratio R2, is presented. Using a ramped bunch train (RBT) rather than a single drive bunch, the enhanced transformer ratio (ETR) technique is able to increase the transformer ratio R above the ordinary limit of 2. To match the wavelength of the fundamental mode of the wakefield with the bunch length (sigmaz=2 mm) of the new Argonne wakefield accelerator (AWA) drive gun (where the experiment will be performed), a 26.625 GHz dielectric based accelerating structure is required. This transformer ratio enhancement technique based on our dielectric-loaded waveguide design will result in a compact, high efficiency accelerating structures for future wakefield accelerators.

  4. 12/16/2000 TheEASE BranchPredictor 1 Decem ber16th,2000

    E-Print Network [OSTI]

    Evans, Brian L.

    12/16/2000 TheEASE BranchPredictor 1 Decem ber16th,2000 TheEASE Branch PredictorTheEASE Branch Predictor SereneBanerjee,Lizy K .John,Brian L.Evans #12;12/16/2000 TheEASE BranchPredictor 2 M otivation ance ­ Predictbranch occurrence ­ Predictbranch address · M issed speculations decreasethroughput #12;12/16/2000

  5. Branching actin network remodeling governs the force-velocity relationship

    E-Print Network [OSTI]

    Daniel B. Smith; Jian Liu

    2011-11-28

    Actin networks, acting as an engine pushing against an external load, are fundamentally important to cell motility. A measure of the effectiveness of an engine is the velocity the engine is able to produce at a given force, the force-velocity curve. One type of force-velocity curve, consisting of a concave region where velocity is insensitive to increasing force followed by a decrease in velocity, is indicative of an adaptive response. In contrast, an engine whose velocity rapidly decays as a convex curve in response to increasing force would indicate a lack of adaptive response. Even taken outside of a cellular context, branching actin networks have been observed to exhibit both concave and convex force-velocity curves. The exact mechanism that can explain both force-velocity curves is not yet known. We carried out an agent-based stochastic simulation to explore such a mechanism. Our results suggest that upon loading, branching actin networks are capable of remodeling by increasing the number filaments growing against the load. Our model provides a mechanism that can account for both convex and concave force-velocity relationships observed in branching actin networks. Finally, our model gives a potential explanation to the experimentally observed force history dependence for actin network velocity.

  6. Applied Probability Trust (21 October 2008) CONTINUOUS-STATE BRANCHING PROCESSES AND SELF-SIMILARITY

    E-Print Network [OSTI]

    Applied Probability Trust (21 October 2008) CONTINUOUS-STATE BRANCHING PROCESSES AND SELF study the -stable continuous-state branching processes (for (1, 2]) and the latter process conditioned of the Lamperti transformation for continuous state branching processes and the Lamperti transformation

  7. A BreakEven Formulation for Evaluating Branch Predictor Energy Efficiency #

    E-Print Network [OSTI]

    Huang, Wei

    A Break­Even Formulation for Evaluating Branch Predictor Energy Efficiency # Michele Co, Dee A demonstrated that a better branch pre­ dictor can increase the energy­efficiency of the system, even if the new a simple, effective metric for eval­ uating the tradeoff between processor energy­efficiency and branch

  8. Branching morphogenesis of the lung: new molecular insights into an old

    E-Print Network [OSTI]

    Chuang, Pao-Tien

    Branching morphogenesis of the lung: new molecular insights into an old problem Pao-Tien Chuang1 It has been known for decades that branching morpho- genesis of the lung is mediated through reciprocal between major signaling path- ways during branching morphogenesis of the lung in mice. It has been known

  9. The genealogy of branching Brownian motion with absorption by Julien Berestycki

    E-Print Network [OSTI]

    Berestycki, Julien

    The genealogy of branching Brownian motion with absorption by Julien Berestycki , Nathana-state branching process. Furthermore, the genealogy of the particles is then governed by a coalescent process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 7.2 Flows describing the genealogy of branching Brownian motion . . . . . . . . . . . . 65 7

  10. Dimensional Reduction and Crossover to Mean-Field Behavior for Branched Polymers

    E-Print Network [OSTI]

    Dimensional Reduction and Crossover to Mean-Field Behavior for Branched Polymers John Z. Imbrie will review recent results on dimensional reduction for branched polymers, and discuss implications for critical phenomena. Parisi and Sourlas argued in [PS81] that branched polymers fall into the universal- ity

  11. Dimensions and aspect ratios of natural ice crystals

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Um, J.; McFarquhar, G. M.; Hong, Y. P.; Lee, S. -S.; Jung, C. H.; Lawson, R. P.; Mo, Q.

    2015-04-15

    During the 2006 Tropical Warm Pool International Cloud Experiment (TWP-ICE) in the tropics, the 2008 Indirect and Semi-Direct Aerosol Campaign (ISDAC) in the Arctic, and the 2010 Small PARTicles In CirrUS (SPARTICUS) campaign at mid-latitudes, high-resolution images of ice crystals were recorded by a Cloud Particle Imager at temperatures (T) between -87 and 0 °C. The projected maximum dimension (D'), length (L'), and width (W') of pristine columns, plates, and component bullets of bullet rosettes were measured using newly developed software, the Ice Crystal Ruler. The number of bullets in each bullet rosette was also measured. Column crystals were furthermore »distinguished as either horizontally oriented columns or columns with other orientations to eliminate any orientation effect on the measured dimensions. The dimensions and aspect ratios (AR, the dimension of the major axis divided by the dimension of the minor axis) of crystals were determined as functions of temperature, geophysical location, and type of cirrus. Dimensions of crystals generally increased with temperature. Columns and bullets had larger dimensions (i.e., W') of the minor axis (i.e., a axis) for a given dimension (i.e., D' orL') of the major axis (i.e., c axis), and thus smaller AR, as T increased, whereas this trend did not occur for plate crystals. The average number of branches in bullet rosettes was 5.50 ± 1.35 during three campaigns and 6.32 ± 1.34 (5.46 ± 1.34; 4.95 ± 1.01) during TWP-ICE (SPARTICUS; ISDAC). The AR of bullets increased with the number of branches in bullet rosettes. Most dimensions of crystals and ARs of columnar crystals measured during SPARTICUS were larger than those measured during TWP-ICE and ISDAC at ?67 L–W relationships of columns derived using current data exhibited a strong dependence on temperature; similar relationships determined in previous studies were within the range of the current data.« less

  12. Hawaii Clean Water Branch Forms Webpage | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New PagesSustainableGlynnMassachusetts:Ohio: EnergyMinnesota:Havre deBioEnergyWater Branch

  13. EA-263 UBS AG, London Branch | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-inPPL EnergyPlus, LLC to export electric energySvcs to3 UBS AG, London Branch

  14. ing delivery of shipment. For

    E-Print Network [OSTI]

    Galef Jr., Bennett G.

    satisfactory food is available and in which no monophage could sur- UfO: ~NETT G. GALEF, JR. AND MATTHEW BECK

  15. Duty-ratio of cooperative molecular motors

    E-Print Network [OSTI]

    Nadiv Dharan; Oded Farago

    2012-01-22

    Molecular motors are found throughout the cells of the human body, and have many different and important roles. These micro-machines move along filament tracks, and have the ability to convert chemical energy into mechanical work that powers cellular motility. Different types of motors are characterized by different duty-ratios, which is the fraction of time that a motor is attached to its filament. In the case of myosin II - a non-processive molecular machine with a low duty ratio - cooperativity between several motors is essential to induce motion along its actin filament track. In this work we use statistical mechanical tools to calculate the duty ratio of cooperative molecular motors. The model suggests that the effective duty ratio of non-processive motors that work in cooperation is lower than the duty ratio of the individual motors. The origin of this effect is the elastic tension that develops in the filament which is relieved when motors detach from the track.

  16. Advanced Branching Control and Characterization of Inorganic Semiconducting Nanocrystals

    SciTech Connect (OSTI)

    Hughes, Steven Michael

    2007-12-31

    The ability to finely tune the size and shape of inorganic semiconducting nanocrystals is an area of great interest, as the more control one has, the more applications will be possible for their use. The first two basic shapes develped in nanocrystals were the sphere and the anistropic nanorod. the II_VI materials being used such as Cadmium Selenide (CdSe) and Cadmium Telluride (CdTe), exhibit polytypism, which allows them to form in either the hexagonally packed wurtzite or cubically packed zinc blende crystalline phase. The nanorods are wurtzite with the length of the rod growing along the c-axis. As this grows, stacking faults may form, which are layers of zinc blende in the otherwise wurtzite crystal. Using this polytypism, though, the first generation of branched crystals were developed in the form of the CdTe tetrapod. This is a nanocrystal that nucleates in the zincblend form, creating a tetrahedral core, on which four wurtzite arms are grown. This structure opened up the possibility of even more complex shapes and applications. This disseration investigates the advancement of branching control and further understanding the materials polytypism in the form of the stacking faults in nanorods.

  17. Towards a consistent description of in-medium parton branching

    E-Print Network [OSTI]

    Liliana Apolinário; Néstor Armesto; Guilherme Milhano; Carlos A. Salgado

    2015-05-25

    Ultra-relativistic heavy-ion collisions are a window of opportunity to study QCD matter under extreme conditions of temperature and density, such as the quark-gluon plasma. Among the several possibilities, the study of jet quenching - generic name given to in-medium energy loss modifications of the parton branching - is a powerful tool to assess the properties of this new state of matter. The description of the parton shower is very well understood in vacuum (controlled reference) and medium-induced modifications of this process can be experimentally accessed through jet measurements. Current experimental data, however, cannot be entirely described only with energy loss phenomena. Transverse momentum broadening and decoherence effects, both theoretically established by now, and their interplay are essential to build a consistent picture of the medium-modifications of the parton branching and to achieve a correct description of the current experimental data. In this write-up, we will present the latest developments that address such unified description.

  18. The Effect of Sedimentation on Plutonium Transport in Fourmile Branch

    SciTech Connect (OSTI)

    Chen, K.F.

    2002-02-21

    The major mechanisms of radioactive material transport and fate in surface water are sources, dilution, advection and dispersion of radionuclides by flow and surface waves, radionuclide decay, and interaction between sediment and radionuclides. STREAM II, an aqueous transport module of the Savannah River Site emergency response WIND system, accounts for the source term, and the effects of dilution, advection and dispersion. Although the model has the capability to account for nuclear decay, due to the short time interval of interest for emergency response, the effect of nuclear decay is very small and so it is not employed. The interactions between the sediment and radionuclides are controlled by the flow conditions and physical and chemical characteristics of the radionuclides and the sediment constituents. The STREAM II version used in emergency response must provide results relatively quickly; it therefore does not model the effects of sediment deposition/resuspension. This study estimates the effects of sediment deposition/resuspension on aqueous plutonium transport in Fourmile Branch. There are no measured data on plutonium transport through surface water available for direct model calibration. Therefore, a literature search was conducted to find the range of plutonium partition coefficients based on laboratory experiments and field measurements. A sensitivity study of the calculated plutonium peak concentrations as a function of the input parameter of partition coefficient was then performed. Finally, an estimation of the plutonium partition coefficient was made for the Fourmile Branch.

  19. Golden Ratio Prediction for Solar Neutrino Mixing

    E-Print Network [OSTI]

    Adisorn Adulpravitchai; Alexander Blum; Werner Rodejohann

    2009-06-17

    It has recently been speculated that the solar neutrino mixing angle is connected to the golden ratio phi. Two such proposals have been made, cot theta_{12} = phi and cos theta_{12} = phi/2. We compare these Ansatze and discuss a model leading to cos theta_{12} = phi/2 based on the dihedral group D_{10}. This symmetry is a natural candidate because the angle in the expression cos theta_{12} = phi/2 is simply pi/5, or 36 degrees. This is the exterior angle of a decagon and D_{10} is its rotational symmetry group. We also estimate radiative corrections to the golden ratio predictions.

  20. Radioactive anomaly discrimination from spectral ratios

    DOE Patents [OSTI]

    Maniscalco, James; Sjoden, Glenn; Chapman, Mac Clements

    2013-08-20

    A method for discriminating a radioactive anomaly from naturally occurring radioactive materials includes detecting a first number of gamma photons having energies in a first range of energy values within a predetermined period of time and detecting a second number of gamma photons having energies in a second range of energy values within the predetermined period of time. The method further includes determining, in a controller, a ratio of the first number of gamma photons having energies in the first range and the second number of gamma photons having energies in the second range, and determining that a radioactive anomaly is present when the ratio exceeds a threshold value.

  1. WIDE BINARY EFFECTS ON ASYMMETRIES IN ASYMPTOTIC GIANT BRANCH CIRCUMSTELLAR ENVELOPES

    SciTech Connect (OSTI)

    Kim, Hyosun; Taam, Ronald E., E-mail: hkim@asiaa.sinica.edu.tw, E-mail: r-taam@northwestern.edu [Academia Sinica Institute of Astronomy and Astrophysics, P.O. Box 23-141, Taipei 10617, Taiwan (China)

    2012-11-01

    Observations of increasingly higher spatial resolution reveal the existence of asymmetries in the circumstellar envelopes of a small fraction of asymptotic giant branch (AGB) stars. Although there is no general consensus for their origin, a binary companion star may be responsible. Within this framework, we investigate the gravitational effects associated with a sufficiently wide binary system, where Roche lobe overflow is unimportant, on the outflowing envelopes of AGB stars using three-dimensional hydrodynamic simulations. The effects due to individual binary components are separately studied, enabling the investigation of the stellar and circumstellar characteristics in detail. The reflex motion of the AGB star alters the wind velocity distribution, thereby determining the overall shape of the outflowing envelope. On the other hand, the interaction of the companion with the envelope produces a gravitational wake, which exhibits a vertically thinner shape. The two patterns overlap and form clumpy structures. To illustrate the diversity of shapes, we present the numerical results as a function of inclination angle. Not only is spiral structure produced by the binary interaction, but arc patterns are also found that represent the former structure when viewed at different inclinations. The arcs reveal a systematic shift of their centers of curvature for cases when the orbital speed of the AGB star is comparable to its wind speed. They take on the shape of a peanut for inclinations nearly edge-on. In the limit of slow orbital motion of the AGB star relative to the wind speed, the arc pattern becomes nearly spherically symmetric. We find that the aspect ratio of the overall oblate shape of the pattern is an important diagnostic probe of the binary as it can be used to constrain the orbital velocity of the AGB star, and moreover, the binary mass ratio.

  2. Measurement of branching fraction and CP asymmetries in B->D0(cp)K decays

    E-Print Network [OSTI]

    The BABAR Collaboration; B. Aubert

    2007-08-11

    We present a preliminary study of $B^- \\to D^0_{CP} \\pi^-$ and $B^- \\to D^0_{CP} K^-$ decays, with the $D^0_{CP}$ reconstructed in the CP-odd eigenstates $K_s \\pi^0$, $K_s \\omega$, in the CP-even eigenstates $K^+ K^-$, $\\pi^+ \\pi^-$, and in the (non-CP) flavor eigenstate $K^\\mp \\pi^\\pm$. Using a sample of about 382 million Y(4S) decays into BBbar pairs, collected with the BABAR detector operating at the PEP-II asymmetric-energy B Factory at SLAC, we measure the ratios of the branching fractions R_CP+- and the direct CP asymmetries A_CP+-. The results are: R_CP- = 0.81 \\pm 0.10 (stat) \\pm 0.05 (syst) R_CP+ = 1.07 \\pm 0.10 (stat) \\pm 0.04 (syst) A_CP- = -0.19 \\pm 0.12 (stat) \\pm 0.02 (syst) A_CP+ = 0.35 \\pm 0.09 (stat) \\pm 0.05 (syst)

  3. Pubblicato in Polo M. (a cura di), Industria bancaria e concorrenza, Il Mulino, 2000. Branching and competitiveness across regions

    E-Print Network [OSTI]

    Cerasi, Vittoria

    entry to a new branch on the ground of discretionary economic reasons. As a result, 8000 new branches behaviour. We find evidence that the cost of opening branches has reduced. Although the implementation in terms of competitiveness, branching opportunity costs and profitability in line with stylised facts

  4. Catch to Bycatch Ratios: Comparing Hawaii's Longline

    E-Print Network [OSTI]

    Hawai'i at Manoa, University of

    Catch to Bycatch Ratios: Comparing Hawaii's Longline Fisheries with Others Paul K. Bartram and J. John Kaneko PacMar, Inc. 3615 Harding Avenue, Suite 409 Honolulu, Hawaii SOEST 04-05 JIMAR Contribution finfish bycatch per unit effort estimates (BPUE) for Hawaii pelagic longline fisheries without assistance

  5. Measurement of Branching Fractions of B0 Decays to K1(1270)+ pi- and K1(1400)+ pi-

    SciTech Connect (OSTI)

    Aubert, Bernard; Bona, M.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Lopez, L.; Palano, Antimo; Pappagallo, M.; Eigen, G.; Stugu, Bjarne; Sun, L.; Abrams, G.S.; Battaglia, M.; Brown, D.N.; Cahn, Robert N.; Jacobsen, R.G.; /LBL, Berkeley /Birmingham U. /Ruhr U., Bochum /Bristol U. /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UCLA /UC, Riverside /UC, San Diego /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 /Harvard U. /Heidelberg U. /Humboldt U., Berlin /Imperial Coll., London /Iowa 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. /Maryland U. /Massachusetts U., Amherst /MIT /McGill U. /Consorzio Milano Ricerche /INFN, Milan /Mississippi U. /Montreal U. /Mt. Holyoke Coll. /Napoli Seconda U. /INFN, Naples /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /Padua U. /INFN, Padua /Paris U., VI-VII /Pennsylvania U. /Perugia U. /INFN, Perugia /INFN, Pisa /Princeton U. /Banca di Roma /Frascati /Rostock U. /Rutherford /DAPNIA, Saclay /South Carolina U. /SLAC /Stanford U., Phys. Dept. /SUNY, Albany /Tennessee U. /Texas U. /Texas U., Dallas /Turin U. /INFN, Turin /Trieste U. /INFN, Trieste /Valencia U., IFIC /Victoria U. /Warwick U. /Wisconsin U., Madison

    2008-08-04

    We present a measurement of the branching fraction of neutral B meson decaying to final states containing a K1 meson, i.e. K{sub 1}(1270) and K{sub 1}(1400), and a charged pion. The data, collected with the BABAR detector at the Stanford Linear Accelerator Center, represent 454 million B{bar B} pairs produced in e{sup +}e{sup -} annihilation. We measure the branching fraction {Beta}(B{sup 0} {yields} K{sub 1}{sup +}{pi}{sup -}) = (31.0 {+-} 2.7 {+-} 6.9) x 10{sup -6}, where the first error quoted is statistical and the second is systematic. In the framework of the K-matrix formalism used to describe these decays, we also set limits on the ratio of the production constants for the K{sub 1}(1270){sup +} and K{sub 1}(1400){sup +} mesons in B{sup 0} decays.

  6. Q-branch Raman scattering and modern kinetic thoery

    SciTech Connect (OSTI)

    Monchick, L. [The Johns Hopkins Univ., Laurel, MD (United States)

    1993-12-01

    The program is an extension of previous APL work whose general aim was to calculate line shapes of nearly resonant isolated line transitions with solutions of a popular quantum kinetic equation-the Waldmann-Snider equation-using well known advanced solution techniques developed for the classical Boltzmann equation. The advanced techniques explored have been a BGK type approximation, which is termed the Generalized Hess Method (GHM), and conversion of the collision operator to a block diagonal matrix of symmetric collision kernels which then can be approximated by discrete ordinate methods. The latter method, which is termed the Collision Kernel method (CC), is capable of the highest accuracy and has been used quite successfully for Q-branch Raman scattering. The GHM method, not quite as accurate, is applicable over a wider range of pressures and has proven quite useful.

  7. Oscillating side-branch enhancements of thermoacoustic heat exchangers

    SciTech Connect (OSTI)

    Swift, Gregory W.

    2003-05-13

    A regenerator-based engine or refrigerator has a regenerator with two ends at two different temperatures, through which a gas oscillates at a first oscillating volumetric flow rate in the direction between the two ends and in which the pressure of the gas oscillates, and first and second heat exchangers, each of which is at one of the two different temperatures. A dead-end side branch into which the gas oscillates has compliance and is connected adjacent to one of the ends of the regenerator to form a second oscillating gas flow rate additive with the first oscillating volumetric flow rate, the compliance having a volume effective to provide a selected total oscillating gas volumetric flow rate through the first heat exchanger. This configuration enables the first heat exchanger to be configured and located to better enhance the performance of the heat exchanger rather than being confined to the location and configuration of the regenerator.

  8. MACRO-ENVIRONMENTAL MAPPING OF INTERNATIONAL BRANCH CAMPUS ACTIVITIES OF UNIVERSITIES WORLDWIDE

    E-Print Network [OSTI]

    Kosmützky, Ann; Krücken , Georg

    2014-01-01

    issues and trends in offshore higher education. London:Huisman, J. (2012). Managing offshore branch campuses. Ansand? Academic work in an offshore campus of an Australian

  9. A quantum framework for likelihood ratios

    E-Print Network [OSTI]

    Rachael L. Bond; Yang-Hui He; Thomas C. Ormerod

    2015-08-04

    The ability to calculate precise likelihood ratios is fundamental to many STEM areas, such as decision-making theory, biomedical science, and engineering. However, there is no assumption-free statistical methodology to achieve this. For instance, in the absence of data relating to covariate overlap, the widely used Bayes' theorem either defaults to the marginal probability driven "naive Bayes' classifier", or requires the use of compensatory expectation-maximization techniques. Equally, the use of alternative statistical approaches, such as multivariate logistic regression, may be confounded by other axiomatic conditions, e.g., low levels of co-linearity. This article takes an information-theoretic approach in developing a new statistical formula for the calculation of likelihood ratios based on the principles of quantum entanglement. In doing so, it is argued that this quantum approach demonstrates: that the likelihood ratio is a real quality of statistical systems; that the naive Bayes' classifier is a special case of a more general quantum mechanical expression; and that only a quantum mechanical approach can overcome the axiomatic limitations of classical statistics.

  10. Secondary sex ratios and male lifespan: Damaged or culled cohorts

    E-Print Network [OSTI]

    Catalano, Ralph; Bruckner, Tim

    2006-01-01

    9. Lazarus, J. (2002) in Sex Ratios: Concepts and ResearchSecondary sex ratios and male lifespan: Damaged or culledreduce the human secondary sex ratio (i.e. , the odds of a

  11. Div ision of T echnology, Industry & Economics Energy Branch Deploying renewable energy

    E-Print Network [OSTI]

    Canet, Léonie

    Div ision of T echnology, Industry & Economics Energy Branch Deploying renewable energy, Industry & Economics Energy Branch 1. Policy landscape 2. Helping transition to Renewable Energy 3 governments are promoting renewable energy. Renewable energy ­ Policy Landscape #12;Div ision of T echnology

  12. A new branch of mountain pass solutions for the choreographical 3body problem

    E-Print Network [OSTI]

    A new branch of mountain pass solutions for the choreographical 3­body problem G. Arioli.terracini@unimib.it Abstract. We prove the existence of a new branch of solutions of Mountain Pass type for the periodic 3 on a bisection algorithm, we provide a numerical non­rigorous solution of Mountain Pass type for this problem

  13. Fluid transport in branched structures with temporary closures: A model for quasistatic lung inflation

    E-Print Network [OSTI]

    Buldyrev, Sergey

    Fluid transport in branched structures with temporary closures: A model for quasistatic lung a model system relevant to the inflation of a mammalian lung, an asymmetric bifurcating structure description of the underlying branching structure of the lung, by analyzing experimental pressure-volume data

  14. Branched CNT@SnO2 nanorods@carbon hierarchical heterostructures for lithium ion

    E-Print Network [OSTI]

    Qi, Limin

    Branched CNT@SnO2 nanorods@carbon hierarchical heterostructures for lithium ion batteries with high used as an anode material in lithium ion batteries, the branched CNT@SnO2@C heterostructures exhibited of the 1D mesocrystalline SnO2 nanorods. Introduction Lithium ion batteries (LIBs) have become

  15. Understanding trait interactions and their impacts on growth in Scots pine branches across Europe

    E-Print Network [OSTI]

    Mencuccini, Maurizio

    ­effect relationships between anatomical traits, hydraulic traits and branch growth, we measured for each branch Studies, Wageningen University, PO 47, NL­6700 AA Wageningen, The Netherlands; 2 CREAF / Ecology Unit: the tracheid hydraulic diame- ter, double cell wall thickness, cell lumen span area, wood density, cavitation

  16. Eciency of the Incomplete Enumeration algorithm for Monte-Carlo simulation of linear and branched polymers.

    E-Print Network [OSTI]

    Dhar, Deepak

    polymers. Sumedha #3; and Deepak Dhar y Department Of Theoretical Physics Tata Institute Of Fundamental algorithm for linear and branched polymers. There is a qualitative di#11;erence in the eÆciency in these two for linear polymers, but as exp(cn #11; ) for branched (undirected and directed) polymers, where 0

  17. Sox9 plays multiple roles in the lung epithelium during branching morphogenesis

    E-Print Network [OSTI]

    Sander, Maike

    Sox9 plays multiple roles in the lung epithelium during branching morphogenesis Briana E. Rockicha, Durham, NC, and approved October 2, 2013 (received for review June 21, 2013) Lung branching morphogenesis lung. Intricate regulation of signaling pathways, tran- scription factors, and epithelial

  18. Recovery of Free Energy Branches in Single Molecule Experiments Ivan Junier,1

    E-Print Network [OSTI]

    Ritort, Felix

    Recovery of Free Energy Branches in Single Molecule Experiments Ivan Junier,1 Alessandro Mossa,2 19 February 2009) We present a method for determining the free energy of coexisting states from use optical tweezers to determine the free energy branches of the native and unfolded states of a two

  19. A Branch and Bound Algorithm for the Protein Folding Problem in the HP Lattice Model

    E-Print Network [OSTI]

    Istrail, Sorin

    Article A Branch and Bound Algorithm for the Protein Folding Problem in the HP Lattice Model Mao tool for the protein folding problem. Key words: protein folding, HP model, branch and bound, lattice Introduction The protein folding problem, or the protein struc- ture prediction problem, is one of the most

  20. High aspect ratio, remote controlled pumping assembly

    DOE Patents [OSTI]

    Brown, S.B.; Milanovich, F.P.

    1995-11-14

    A miniature dual syringe-type pump assembly is described which has a high aspect ratio and which is remotely controlled, for use such as in a small diameter penetrometer cone or well packer used in water contamination applications. The pump assembly may be used to supply and remove a reagent to a water contamination sensor, for example, and includes a motor, gearhead and motor encoder assembly for turning a drive screw for an actuator which provides pushing on one syringe and pulling on the other syringe for injecting new reagent and withdrawing used reagent from an associated sensor. 4 figs.

  1. High aspect ratio, remote controlled pumping assembly

    DOE Patents [OSTI]

    Brown, Steve B. (Livermore, CA); Milanovich, Fred P. (Lafayette, CA)

    1995-01-01

    A miniature dual syringe-type pump assembly which has a high aspect ratio and which is remotely controlled, for use such as in a small diameter penetrometer cone or well packer used in water contamination applications. The pump assembly may be used to supply and remove a reagent to a water contamination sensor, for example, and includes a motor, gearhead and motor encoder assembly for turning a drive screw for an actuator which provides pushing on one syringe and pulling on the other syringe for injecting new reagent and withdrawing used reagent from an associated sensor.

  2. Blowing Ratio Effects on Film Cooling Effectiveness 

    E-Print Network [OSTI]

    Liu, Kuo-Chun

    2010-01-14

    is generated by using grids upstream of the test section, the grid functions as a blockage to the flow. Jet grids are also used to generate free stream turbulence. Air is forced through an array of pipes into mainstream. At the exit of combustor, the turbulence... blowing ratios are used in this study, which are 0.5, 1.6, 2.0 and 3.0. Experiment is operated under three mainstream flow conditions, one is with subsonic exit velocity as Mach number = 0.7 and the others are with supersonic exit velocities as Mach number...

  3. Energy Balance Bowen Ratio Station (EBBR) Handbook

    SciTech Connect (OSTI)

    Cook, DR

    2011-02-23

    The energy balance Bowen ratio (EBBR) system produces 30-minute estimates of the vertical fluxes of sensible and latent heat at the local surface. Flux estimates are calculated from observations of net radiation, soil surface heat flux, and the vertical gradients of temperature and relative humidity (RH). Meteorological data collected by the EBBR are used to calculate bulk aerodynamic fluxes, which are used in the Bulk Aerodynamic Technique (BA) EBBR value-added product (VAP) to replace sunrise and sunset spikes in the flux data. A unique aspect of the system is the automatic exchange mechanism (AEM), which helps to reduce errors from instrument offset drift.

  4. CO (Carbon Monoxide Mixing Ratio System) Handbook

    SciTech Connect (OSTI)

    Biraud, S

    2011-02-23

    The main function of the CO instrument is to provide continuous accurate measurements of carbon monoxide mixing ratio at the ARM SGP Central Facility (CF) 60-meter tower (36.607 °N, 97.489 °W, 314 meters above sea level). The essential feature of the control and data acquisition system is to record signals from a Thermo Electron 48C and periodically calibrate out zero and span drifts in the instrument using the combination of a CO scrubber and two concentrations of span gas (100 and 300 ppb CO in air). The system was deployed on May 25, 2005.

  5. Backflow in Post-Asymptotic Giant Branch Stars

    E-Print Network [OSTI]

    Noam Soker

    2001-03-07

    We derive the conditions for a backflow toward the central star(s) of circumstellar material to occur during the post-asymptotic giant branch (AGB) phase. The backflowing material may be accreted by the post-AGB star and/or its companion, if such exists. Such a backflow may play a significant role in shaping the descendant planetary nebula, by, among other things, slowing down the post-AGB evolution, and by forming an accretion disk which may blow two jets. We consider three forces acting on a slowly moving mass element: the gravity of the central system, radiation pressure, and fast wind ram pressure. We find that for a significant backflow to occur, a slow dense flow should exsist, such that the relation between the total mass in the slow flow, M, and the solid angle it covers, Omega, is given by (4*pi*M/Omega)>0.1Mo. The requirement for both high mass loss rate per unit solid angle and a very slow wind, such that it can be decelerated and flow back, probably requires close binary interaction.

  6. Flexible Conversion Ratio Fast Reactor Systems Evaluation

    SciTech Connect (OSTI)

    Neil Todreas; Pavel Hejzlar

    2008-06-30

    Conceptual designs of lead-cooled and liquid salt-cooled fast flexible conversion ratio reactors were developed. Both concepts have cores reated at 2400 MWt placed in a large-pool-type vessel with dual-free level, which also contains four intermediate heat exchanges coupling a primary coolant to a compact and efficient supercritical CO2 Brayton cycle power conversion system. Decay heat is removed passively using an enhanced Reactor Vessel Auxiliary Cooling System and a Passive Secondary Auxiliary Cooling System. The most important findings were that (1) it is feasible to design the lead-cooled and salt-cooled reactor with the flexible conversion ratio (CR) in the range of CR=0 and CR=1 n a manner that achieves inherent reactor shutdown in unprotected accidents, (2) the salt-cooled reactor requires Lithium thermal Expansion Modules to overcme the inherent salt coolant's large positive coolant temperature reactivity coefficient, (3) the preferable salt for fast spectrum high power density cores is NaCl-Kcl-MgCl2 as opposed to fluoride salts due to its better themal-hydraulic and neutronic characteristics, and (4) both reactor, but attain power density 3 times smaller than that of the sodium-cooled reactor.

  7. Hydraulic system for a ratio change transmission

    DOE Patents [OSTI]

    Kalns, Ilmars (Northville, MI)

    1981-01-01

    Disclosed is a drive assembly (10) for an electrically powered vehicle (12). The assembly includes a transaxle (16) having a two-speed transmission (40) and a drive axle differential (46) disposed in a unitary housing assembly (38), an oil-cooled prime mover or electric motor (14) for driving the transmission input shaft (42), an adapter assembly (24) for supporting the prime mover on the transaxle housing assembly, and a hydraulic system (172) providing pressurized oil flow for cooling and lubricating the electric motor and transaxle and for operating a clutch (84) and a brake (86) in the transmission to shift between the two-speed ratios of the transmission. The adapter assembly allows the prime mover to be supported in several positions on the transaxle housing. The brake is spring-applied and locks the transmission in its low-speed ratio should the hydraulic system fail. The hydraulic system pump is driven by an electric motor (212) independent of the prime mover and transaxle.

  8. Heavy elements in globular clusters: The role of asymptotic giant branch stars

    SciTech Connect (OSTI)

    Straniero, O.; Cristallo, S.; Piersanti, L., E-mail: straniero@oa-teramo.inaf.it [INAF-Osservatorio Astronomico di Collurania, I-64100 Teramo (Italy)

    2014-04-10

    Recent observations of heavy elements in globular clusters reveal intriguing deviations from the standard paradigm of the early galactic nucleosynthesis. If the r-process contamination is a common feature of halo stars, s-process enhancements are found in a few globular clusters only. We show that the combined pollution of asymptotic giant branch (AGB) stars with a mass ranging between 3 to 6 M {sub ?} may account for most of the features of the s-process overabundance in M4 and M22. In these stars, the s process is a mixture of two very different neutron-capture nucleosynthesis episodes. The first is due to the {sup 13}C(?, n){sup 16}O reaction and takes place during the interpulse periods. The second is due to the {sup 22}Ne(?, n){sup 25}Mg reaction and takes place in the convective zones generated by thermal pulses. The production of the heaviest s elements (from Ba to Pb) requires the first neutron burst, while the second produces large overabundances of light s (Rb, Sr, Y, Zr). The first mainly operates in the less massive AGB stars, while the second dominates in the more massive. From the heavy-s/light-s ratio, we derive that the pollution phase should last for 150 ± 50 Myr, a period short enough compared to the formation timescale of the globular cluster system, but long enough to explain why the s-process pollution is observed in a few cases only. With few exceptions, our theoretical prediction provides a reasonable reproduction of the observed s-process abundances, from Sr to Hf. However, Ce is probably underproduced by our models, while Rb and Pb are overproduced. Possible solutions are discussed.

  9. THE EFFECTS OF ROTATION ON s-PROCESS NUCLEOSYNTHESIS IN ASYMPTOTIC GIANT BRANCH STARS

    SciTech Connect (OSTI)

    Piersanti, L.; Cristallo, S.; Straniero, O., E-mail: piersanti@oa-teramo.inaf.it [INAF-Osservatorio Astronomico di Collurania, via Maggini snc, I-64100 Teramo (Italy)

    2013-09-10

    In this paper, we analyze the effects induced by rotation on low-mass asymptotic giant branch stars. We compute two sets of models, M = 2.0 M{sub Sun} at [Fe/H] = 0 and M = 1.5 M{sub Sun} at [Fe/H] = -1.7, by adopting main-sequence rotation velocities in the range 0-120 km s{sup -1}. At high metallicity, we find that the Goldreich-Schubert-Fricke instability, active at the interface between the convective envelope and the rapid rotating core, contaminates the {sup 13}C-pocket (the major neutron source) with {sup 14}N (the major neutron poison), thus reducing the neutron flux available for the synthesis of heavy elements. As a consequence, the yields of heavy-s elements (Ba, La, Nd, Sm) and, to a lesser extent, those of light-s elements (Sr, Y, Zr) decrease with increasing rotation velocities up to 60 km s{sup -1}. However, for larger initial rotation velocities, the production of light-s and, to a lesser extent, that of heavy-s, begins again to increase, due to mixing induced by meridional circulations. At low metallicity, the effects of meridional circulations are important even at rather low rotation velocity. The combined effect of the Goldreich-Schubert-Fricke instability and meridional circulations determines an increase of light-s and, to a lesser extent, heavy-s elements, while lead is strongly reduced. For both metallicities, the rotation-induced instabilities active during the interpulse phase reduce the neutron-to-seed ratio, so that the spectroscopic indexes [hs/ls] and [Pb/hs] decrease by increasing the initial rotation velocity. Our analysis suggests that rotation could explain the spread in the s-process indexes, as observed in s-process enriched stars at different metallicities.

  10. Accretion of dust grains as a possible origin of metal-poor stars with low alpha/Fe ratios

    E-Print Network [OSTI]

    Toshikazu Shigeyama; Takuji Tsujimoto

    2003-10-10

    The origin of low alpha/Fe ratios in some metal-poor stars, so called low-alpha stars, is discussed. It is found that most of low-alpha stars in the Galaxy are on the main-sequence. This strongly suggests that these stars suffered from external pollution. It is also found that the abundance ratios Zn/Fe of low-alpha stars both in the Galaxy and in dwarf spheroidal galaxies are lower than the average value of Galactic halo stars whereas damped Ly alpha absorbers have higher ratios. This implies that some low-alpha stars accreted matter depleted from gas onto dust grains. To explain the features in these low-alpha stars, we have proposed that metal-poor stars harboring planetary systems are the origin of these low-alpha stars. Stars engulfing a small fraction of planetesimals enhance the surface content of Fe to exhibit low alpha/Fe ratios on their surfaces while they are on the main-sequence, because dwarfs have shallow surface convection zones where the engulfed matter is mixed. After the stars leave the main-sequence, the surface convection zones become deeper to reduce the enhancement of Fe. Eventually, when the stars ascend to the tip of the red giant branch, they engulf giant planets to become low-alpha stars again as observed in dwarf spheroidal galaxies. We predict that low-alpha stars with low Mn/Fe ratios harbor planetary systems.

  11. Abundance ratios in hierarchical galaxy formation

    E-Print Network [OSTI]

    D. Thomas

    1999-01-18

    The chemical enrichment and stellar abundance ratios of galaxies which form in a hierarchical clustering scheme are calculated. For this purpose I adopt the star formation histories (SFH) as they are delivered by semi-analytic models in Kauffmann (1996}. It turns out that the average SFH of cluster ellipticals does not yield globally alpha-enhanced stellar populations. The star burst that occurs when the elliptical forms in the major merger plays therefore a crucial role in producing alpha-enhancement. Only under the assumption that the IMF is significantly flattened with respect to the Salpeter value during the burst, a Mg/Fe overabundant population can be obtained. In particular for the interpretation of radial gradients in metallicity and alpha-enhancement, the mixing of global and burst populations are of great importance. The model predicts bright field galaxies to be less alpha-enhanced than their counterparts in clusters.

  12. Beat Cepheid Period Ratios from OPAL Opacities

    E-Print Network [OSTI]

    S. M. Morgan; D. L. Welch

    1997-06-26

    The discovery of a large number of beat Cepheids in the Large Magellanic Cloud in the MACHO survey, provides an opportunity to compare the characteristics of such Cepheids over a range of metallicities. We produced a large grid of linear nonadiabatic pulsation models using the OPAL opacity tables and with compositions corresponding to those of the Milky Way, and the Large and Small Magellanic Clouds. Using the relationship between the period ratio and the main pulsation period, we are able to define a range of models which correspond to the observed beat Cepheids, and thereby constrain the physical characteristics of the LMC beat Cepheids. We are also able to make some predictions about the nature of the yet-to-be-discovered SMC beat Cepheids.

  13. Ecological effects of contaminants in McCoy Branch, 1989-1990

    SciTech Connect (OSTI)

    Ryon, M.G. [ed.

    1992-01-01

    The 1984 Hazardous and Solid Waste Amendments to the Resource Conservation and Recovery Act (RCRA) required assessment of all current and former solid waste management units. Such a RCRA Facility Investigation (RFI) was required of the Y-12 Plant for their Filled Coal Ash Pond on McCoy Branch. Because the disposal of coal ash in the ash pond, McCoy Branch, and Rogers Quarry was not consistent with the Tennessee Water Quality Act, several remediation steps were implemented or planned for McCoy Branch to address disposal problems. The McCoy Branch RFI plan included provisions for biological monitoring of the McCoy Branch watershed. The objectives of the biological monitoring were to: (1) document changes in biological quality of McCoy Branch after completion of a pipeline and after termination of all discharges to Rogers Quarry, (2) provide guidance on the need for additional remediation, and (3) evaluate the effectiveness of implemented remedial actions. The data from the biological monitoring program will also determine if the classified uses, as identified by the State of Tennessee, of McCoy Branch are being protected and maintained. This report discusses results from toxicity monitoring of snails fish community assessment, and a Benthic macroinvertebrate community assessment.

  14. Molecular Design of Branched and Binary Molecules at Ordered Interfaces

    SciTech Connect (OSTI)

    Kirsten Larson Genson

    2005-12-27

    This study examined five different branched molecular architectures to discern the effect of design on the ability of molecules to form ordered structures at interfaces. Photochromic monodendrons formed kinked packing structures at the air-water interface due to the cross-sectional area mismatch created by varying number of alkyl tails and the hydrophilic polar head group. The lower generations formed orthorhombic unit cell with long range ordering despite the alkyl tails tilted to a large degree. Favorable interactions between liquid crystalline terminal groups and the underlying substrate were observed to compel a flexible carbosilane dendrimer core to form a compressed elliptical conformation which packed stagger within lamellae domains with limited short range ordering. A twelve arm binary star polymer was observed to form two dimensional micelles at the air-water interface attributed to the higher polystyrene block composition. Linear rod-coil molecules formed a multitude of packing structures at the air-water interface due to the varying composition. Tree-like rod-coil molecules demonstrated the ability to form one-dimensional structures at the air-water interface and at the air-solvent interface caused by the preferential ordering of the rigid rod cores. The role of molecular architecture and composition was examined and the influence chemically competing fragments was shown to exert on the packing structure. The amphiphilic balance of the different molecular series exhibited control on the ordering behavior at the air-water interface and within bulk structures. The shell nature and tail type was determined to dictate the preferential ordering structure and molecular reorganization at interfaces with the core nature effect secondary.

  15. Production of branched-chain alcohols by recombinant Ralstonia eutropha in fed-batch cultivation

    SciTech Connect (OSTI)

    Fei, Q; Brigham, CJ; Lu, JN; Fu, RZ; Sinskey, AJ

    2013-09-01

    Branched-chain alcohols are considered promising green energy sources due to their compatibility with existing infrastructure and their high energy density. We utilized a strain of Ralstonia eutropha capable of producing branched-chain alcohols and examined its production in flask cultures. In order to increase isobutanol and 3-methyl-1-butanol (isoamyl alcohol) productivity in the engineered strain, batch, fed-batch, and two-stage fed-batch cultures were carried out in this work. The effects of nitrogen source concentration on branched-chain alcohol production were investigated under four different initial concentrations in fermenters. A maximum 380 g m(-3) of branched-chain alcohol production was observed with 2 kg m(-3) initial NH4Cl concentration in batch cultures. A pH-stat control strategy was utilized to investigate the optimum carbon source amount fed during fed-batch cultures for higher cell density. In cultures of R. eutropha strains that did not produce polyhydroxyalkanoate or branched-chain alcohols, a maximum cell dry weight of 36 kg m(-3) was observed using a fed-batch strategy, when 10 kg m(-3) carbon source was fed into culture medium. Finally, a total branched-chain alcohol titer of 790 g m(-3), the highest branched-chain alcohol yield of 0.03 g g(-1), and the maximum branched-chain alcohol productivity of 8.23 g m(-3) h(-1) were obtained from the engineered strain Re2410/pJL26 in a two-stage fed-batch culture system with pH-stat control. Isobutanol made up over 95% (mass fraction) of the total branched-chain alcohols titer produced in this study. (C) 2013 Published by Elsevier Ltd.

  16. p/pi Ratio in Di-Hadron Correlations

    E-Print Network [OSTI]

    Misha Veldhoen; for the ALICE Collaboration

    2012-10-08

    Particle ratios are important observables used to constrain models of particle production in heavy-ion collisions. In this work we report on a measurement of the p/pi ratio in the transverse momentum range 2.0 p_{T,assoc} p_{T,trig} p/pi ratio in the bulk region is compatible with the p/pi ratio of an inclusive measurement, and is much larger than the p/pi ratio in the jet peak. The p/pi ratio in the jet peak is compatible with a PYTHIA reference, in which fragmentation in the vacuum is the dominant mechanism of particle production.

  17. Analysis of the HVAC System at the Willow Branch Intermediate School 

    E-Print Network [OSTI]

    Wei, G.

    1997-01-01

    This report presents an analysis of the HVAC system at the Willow Branch Intermediate School for the MEEN 685 class project. The school is located at College Station, Texas. A portion of the school belonged to Oakwood Intermediate School which...

  18. Siberian Branch of Russian Academy of Sciences BUDKER INSTITUTE OF NUCLEAR PHYSICS

    E-Print Network [OSTI]

    Siberian Branch of Russian Academy of Sciences BUDKER INSTITUTE OF NUCLEAR PHYSICS ANNUAL REPORT 2010 NOVOSIBIRSK 2011 #12;Contents Introduction 7 1. Physics of Elementary Particles...............................................................................32 1.9.2 Physical results

  19. Branched peptide amphiphiles, related epitope compounds and self assembled structures thereof

    DOE Patents [OSTI]

    Stupp, Samuel I. (Chicago, IL); Guler, Mustafa O. (Evanston, IL)

    2008-11-18

    Branched peptide amphiphilic compounds incorporating one or residues providing a pendant amino group for coupling one or more epitope sequences thereto, such compounds and related compositions for enhanced epitope presentation.

  20. Pervasive Synaptic Branch Removal in the Mammalian Neuromuscular System at Birth

    E-Print Network [OSTI]

    Tapia, Juan C.

    Using light and serial electron microscopy, we show profound refinements in motor axonal branching and synaptic connectivity before and after birth. Embryonic axons become maximally connected just before birth when they ...

  1. The thermodynamic properties of mixtures of normal octane and branched paraffin hydrocarbons 

    E-Print Network [OSTI]

    Liu, Edward Kou-Shan

    1975-01-01

    THE THEi%ODYNANIC PROPERTIES Ol' NIXTURES OF NORMAL OCTANE AND BRANCHED PARAFFIN HYDROCARBONS A Thesis by Edward Kou-Shan Liu Submitted to the Graduate College of Texas AkN University in partial fulfillment of the requirement for the degree... of NASTER OF SCIENCE December 1975 Major Subject: Chemical Engineering THF THERMODYNAMIC PROPERTIES OF MIXTURES OF NORMAL OCTANE AND BRANCHED PARAFFIN HYDROCARBONS A Thesis by EDWARD KOU-SHA N LID Approved as to style and content by: Chairman...

  2. Measurement of the B¯?Xs? branching fraction with a sum of exclusive decays

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Saito, T.; Ishikawa, A.; Yamamoto, H.; Abdesselam, A.; Adachi, I.; Aihara, H.; Al Said, S.; Arinstein, K.; Asner, D.?M.; Aushev, T.; et al

    2015-03-04

    We use 772 × 106 BB meson pairs collected at the ?(4S) resonance with the Belle detector to measure the branching fraction for B¯ ? Xs?. Our measurement uses a sum-of-exclusives approach in which 38 of the hadronic final states with strangeness equal to +1, denoted by Xs, are reconstructed. The inclusive branching fraction for MXs s?)=(3.51±0.17±0.33) × 10–4, where the first uncertainty is statistical and the second is systematic.

  3. The core mass growth and stellar lifetime of thermally pulsing asymptotic giant branch stars

    SciTech Connect (OSTI)

    Kalirai, Jason S.; Tremblay, Pier-Emmanuel; Marigo, Paola E-mail: paola.marigo@unipd.it

    2014-02-10

    We establish new constraints on the intermediate-mass range of the initial-final mass relation, and apply the results to study the evolution of stars on the thermally pulsing asymptotic giant branch (TP-AGB). These constraints derive from newly discovered (bright) white dwarfs in the nearby Hyades and Praesepe star clusters, including a total of 18 high signal-to-noise ratio measurements with progenitor masses of M {sub initial} = 2.8-3.8 M {sub ?}. We also include a new analysis of existing white dwarfs in the older NGC 6819 and NGC 7789 star clusters, M {sub initial} = 1.6 and 2.0 M {sub ?}. Over this range of initial masses, stellar evolutionary models for metallicity Z {sub initial} = 0.02 predict the maximum growth of the core of TP-AGB stars. By comparing the newly measured remnant masses to the robust prediction of the core mass at the first thermal pulse on the AGB (i.e., from stellar interior models), we establish several findings. First, we show that the stellar core mass on the AGB grows rapidly from 10% to 30% for stars with M {sub initial} = 1.6 to 2.0 M {sub ?}. At larger masses, the core-mass growth decreases steadily to ?10% at M {sub initial} = 3.4 M {sub ?}, after which there is a small hint of a upturn out to M {sub initial} = 3.8 M {sub ?}. These observations are in excellent agreement with predictions from the latest TP-AGB evolutionary models in Marigo et al. We also compare to models with varying efficiencies of the third dredge-up and mass loss, and demonstrate that the process governing the growth of the core is largely the stellar wind, while the third dredge-up plays a secondary, but non-negligible role. Based on the new white dwarf measurements, we perform an exploratory calibration of the most popular mass-loss prescriptions in the literature, as well as of the third dredge-up efficiency as a function of the stellar mass. Finally, we estimate the lifetime and the integrated luminosity of stars on the TP-AGB to peak at t ? 3 Myr and E = 1.2 × 10{sup 10} L {sub ?} yr for M {sub initial} ? 2 M {sub ?} (t ? 2 Myr for luminosities brighter than the red giant branch tip at log (L/L {sub ?}) > 3.4), decreasing to t = 0.4 Myr and E = 6.1 × 10{sup 9} L {sub ?} yr for stars with M {sub initial} ? 3.5 M {sub ?}. The implications of these results are discussed, especially with respect to general studies aimed at characterizing the integrated light output of TP-AGB stars in population synthesis models.

  4. Controlled synthesis of hyper-branched inorganic nanocrystals withrich three-dimensional structures

    SciTech Connect (OSTI)

    Kanaras, Antonios G.; Sonnichsen, Carsten; Liu, Haitao; Alivisatos, A. Paul

    2005-07-27

    Studies of crystal growth kinetics are tightly integrated with advances in the creation of new nanoscale inorganic building blocks and their functional assemblies 1-11. Recent examples include the development of semiconductor nanorods which have potential uses in solar cells 12-17, and the discovery of a light driven process to create noble metal particles with sharp corners that can be used in plasmonics 18,19. In the course of studying basic crystal growth kinetics we developed a process for preparing branched semiconductor nanocrystals such as tetrapods and inorganic dendrimers of precisely controlled generation 20,21. Here we report the discovery of a crystal growth kinetics regime in which a new class of hyper-branched nanocrystals are formed. The shapes range from 'thorny balls', to tree-like ramified structures, to delicate 'spider net'-like particles. These intricate shapes depend crucially on a delicate balance of branching and extension. The multitudes of resulting shapes recall the diverse shapes of snowflakes 22.The three dimensional nature of the branch points here, however, lead to even more complex arrangements than the two dimensionally branched structures observed in ice. These hyper-branched particles not only extend the available three-dimensional shapes in nanoparticle synthesis ,but also provide a tool to study growth kinetics by carefully observing and modeling particle morphology.

  5. Sex ratios in the rodent malaria parasite, Plasmodium chabaudi 

    E-Print Network [OSTI]

    Reece, S E; Duncan, Alison B; West, Stuart A; Read, Andrew F

    2003-01-01

    The sex ratios of malaria and related Apicomplexan parasites play a major role in transmission success. Here, we address 2 fundamental issues in the sex ratios of the rodent malaria parasite, Plasmodium chabaudi. First we ...

  6. Ultra-short nacelles for low fan pressure ratio propulsors

    E-Print Network [OSTI]

    Peters, Andreas, Ph. D. Massachusetts Institute of Technology

    2014-01-01

    This thesis addresses the uncharted inlet and nacelle design space for low pressure ratio fans for advanced aeroengines. A key feature in low fan pressure ratio (FPR) propulsors with short inlets and nacelles is the increased ...

  7. Measurement of the ratio of specific heats Brian D. Storey

    E-Print Network [OSTI]

    Storey, Brian D.

    Measurement of the ratio of specific heats Brian D. Storey Franklin W. Olin College of Engineering Needham, MA 02492 (Dated: September 25, 2005) I. INTRODUCTION The ratio of specific heats determines how to the differing pressures, "springs" designed with gases of different specific heat ratios have different natural

  8. GLOBAL STABILITY STUDY OF THE ULTRALOW ASPECT RATIO TOKAMAK,

    E-Print Network [OSTI]

    LETTERS GLOBAL STABILITY STUDY OF THE ULTRALOW ASPECT RATIO TOKAMAK, ULART M. YAMADA, N. POMPHREY of the TS-3device at Tokyo Univesity, ultralow aspect ratio tokamak (ULART) configurations have been of the tiltishift modes agree well with the TS-3 data. 1. INTRODUCTION In recent years, low aspect ratio tokamak

  9. Isolation and characterization of portal branch ligation-stimulated Hmga2-positive bipotent hepatic progenitor cells

    SciTech Connect (OSTI)

    Sakai, Hiroshi; Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 B51, Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503 ; Tagawa, Yoh-ichi; Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 B51, Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503; PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 ; Tamai, Miho; Motoyama, Hiroaki; Ogawa, Shinichiro; McEwen Center for Regenerative Medicine, University Health Network, 190 Elizabeth Street, Toronto, Ont., Canada M5G 2C4 ; Soeda, Junpei; Nakata, Takenari; Miyagawa, Shinichi

    2010-12-17

    Research highlights: {yields} Hepatic progenitor cells were isolated from the portal branch-ligated liver of mice. {yields} Portal branch ligation-stimulated hepatic progenitor cells (PBLHCs) express Hmga2. {yields} PBLHCs have bidirectional differentiation capability in vitro. -- Abstract: Hepatic stem/progenitor cells are one of several cell sources that show promise for restoration of liver mass and function. Although hepatic progenitor cells (HPCs), including oval cells, are induced by administration of certain hepatotoxins in experimental animals, such a strategy would be inappropriate in a clinical setting. Here, we investigated the possibility of isolating HPCs in a portal branch-ligated liver model without administration of any chemical agents. A non-parenchymal cell fraction was prepared from the portal branch-ligated or non-ligated lobe, and seeded onto plates coated with laminin. Most of the cells died, but a small number were able to proliferate. These proliferating cells were cloned as portal branch ligation-stimulated hepatic cells (PBLHCs) by the limiting dilution method. The PBLHCs expressed cytokeratin19, albumin, and Hmga2. The PBLHCs exhibited metabolic functions such as detoxification of ammonium ions and synthesis of urea on Matrigel-coated plates in the presence of oncostatin M. In Matrigel mixed with type I collagen, the PBLHCs became rearranged into cystic and tubular structures. Immunohistochemical staining demonstrated the presence of Hmga2-positive cells around the interlobular bile ducts in the portal branch-ligated liver lobes. In conclusion, successful isolation of bipotent hepatic progenitor cell clones, PBLHCs, from the portal branch-ligated liver lobes of mice provides the possibility of future clinical application of portal vein ligation to induce hepatic progenitor cells.

  10. CLOSE TO THE DREDGE: PRECISE X-RAY C AND N ABUNDANCES IN {lambda} ANDROMEDA AND ITS PRECOCIOUS RED GIANT BRANCH MIXING PROBLEM

    SciTech Connect (OSTI)

    Drake, Jeremy J.; Ball, B. [Smithsonian Astrophysical Observatory, MS-3, 60 Garden Street, Cambridge, MA 02138 (United States); Eldridge, John J. [Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA (United Kingdom); Ness, J.-U. [European Space Agency, XMM-Newton Observatory SOC, SRE-OAX, Apartado 78, 28691 Villanueva de la Canada, Madrid (Spain); Stancliffe, Richard J., E-mail: jdrake@cfa.harvard.edu, E-mail: jje@ast.cam.ac.uk, E-mail: Jan-Uwe.Ness@sciops.esa.int, E-mail: richard.stancliffe@monash.edu [Centre for Stellar and Planetary Astrophysics, School of Mathematical Sciences, Monash University, Melbourne, VIC 3800 (Australia)

    2011-11-15

    Chandra LETG+HRC-S and XMM-Newton RGS spectra of H-like C and N lines formed in the corona of the primary star of the RS CVn-type binary {lambda} And, a mildly metal-poor G8 III-IV first ascent giant that completed dredge-up {approx}50 Myr ago, have been used to make a precise measurement of its surface C/N ratio. We obtain the formal result [C/N] = 0.03 {+-} 0.07, which is typical of old disk giants and in agreement with standard dredge-up theory for stars {approx}< 1 M{sub sun}. In contrast, these stars as a group, including {lambda} And, have {sup 12}C/{sup 13}C {approx}< 20, which is much lower than standard model predictions. We show that the abundances of the old disk giants are consistent with models including thermohaline mixing that begins at the red giant branch luminosity function 'bump'. Instead, {lambda} And indicates that the {sup 12}C/{sup 13}C anomaly can be present immediately following dredge-up, contrary to current models of extra mixing on the red giant branch. In the context of other recent C and N abundance results for RS CVn-type binaries it seems likely that the anomaly is associated with either strong magnetic activity, fast rotation, or both, rather than close binarity itself.

  11. Observation of Enhanced Transformer Ratio in Collinear Wakefield Acceleration

    SciTech Connect (OSTI)

    Jing, C.; Kanareykin, A.; Schoessow, P. [Euclid Techlabs LLC, Solon, Ohio 44139 (United States); Power, J. G.; Conde, M.; Yusof, Z.; Gai, W. [High Energy Physics Division, Argonne National Laboratory, Argonne, Illinois-60439 (United States)

    2007-04-06

    One approach to future high energy particle accelerators is based on the wakefield principle: a leading high-charge drive bunch is used to excite fields in an accelerating structure or plasma that in turn accelerates a trailing low-charge witness bunch. The transformer ratio R is defined as the ratio of the maximum energy gain of the witness bunch to the maximum energy loss of the drive bunch. In general, R<2 for this configuration. A number of techniques have been proposed to overcome the transformer ratio limitation. We report here the first experimental study of the ramped bunch train (RBT) technique in a dielectric based accelerating structure. A single drive bunch was replaced by two bunches with charge ratio of 1 ratio 2.5 and a separation of 10.5 wavelengths of the fundamental mode. An average measured transformer ratio enhancement by a factor of 1.31 over the single drive bunch case was obtained.

  12. Search for the decay Bs0 ? ?? and a measurement of the branching fraction for Bs0 ? ??

    SciTech Connect (OSTI)

    Dutta, Deepanwita; Bhuyan, Bipul; Abdesselam, A.; Adachi, I.; Aihara, H.; Al Said, S.; Arinstein, K.; Asner, David M.; Aulchenko, V.; Aushev, T.; Ayad, R.; Aziz, T.; Bahinipati, S.; Bakich, A. M.; Bansal, Vikas; Bhardwaj, V.; Bobrov, A.; Bonvicini, Giovanni; Bracko, Marko; Browder, Thomas E.; Cervenkov, D.; Chen, A.; Cheon, B. G.; Chilikin, K.; Chistov, R.; Cho, K.; Chobanova, V.; Choi, Y.; Cinabro, David A.; Dalseno, J.; Dolezal, Z.; Drasal, Z.; Drutskoy, A.; Dutta, K.; Eidelman, S.; Farhat, H.; Fast, James E.; Frost, O.; Gaur, Vipin; Ganguly, Sudeshna; Garmash, Alexey; Getzkow, D.; Goh, Y. M.; Golob, B.; Hayashii, H.; He, X. H.; Hou, W. S.; Iijima, T.; Ishikawa, A.; Iwasaki, Y.; Jaegle, Igal; Joffe, D.; Kang, K. H.; Kato, E.; Kiesling, C.; Kim, D. Y.; Kim, J. B.; Kim, J. H.; Kim, K. T.; Kim, M. J.; Kim, S. H.; Kim, Y. J.; Kinoshita, Kay; Ko, Byeong Rok; Kodys, P.; Korpar, S.; Krizan, P.; Krokovny, Pavel; Kuhr, Thomas; Kuzmin, A.; Kwon, Y. J.; Lange, J. S.; Lee, I. S.; Lewis, P.; Li, Y.; Li Gioi, L.; Libby, J.; Liventsev, Dmitri; Matvienko, D.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Moll, A.; Mori, T.; Mussa, R.; Nakano, E.; Nakao, M.; Nanut, T.; Nayak, Minakshi; Nisar, N. K.; Nishida, S.; Ogawa, S.; Okuno, S.; Pakhlov, P.; Pakhlova, Galina; Pedlar, Todd K.; Pestotnik, Rok; Petric, Marko; Piilonen, Leo E.; Ribezl, Eva; Ritter, M.; Rostomyan, A.; Sakai, Y.; Sandilya, Saurabh; Santelj, Luka; Sanuki, T.; Sato, Y.; Savinov, Vladimir; Schneider, O.; Schnell, G.; Schwanda, C.; Schwartz, A. J.; Semmler, D.; Shebalin, V.; Shibata, T. A.; Shiu, Jing-Ge; Shwartz, B.; Sibidanov, A.; Simon, F.; Sohn, Y. S.; Sokolov, A.; Solovieva, E.; Staric, M.; Sumihama, M.; Sumiyoshi, T.; Teramoto, Y.; Trabelsi, K.; Uchida, M.; Unno, Yuji; Uno, S.; Usov, Y.; Van Hulse, C.; Vanhoefer, P.; Varner, G.; Vinokurova, A.; Vossen, Anslem G.; Wagner, M. N.; Wang, C. H.; Wang, P.; Watanabe, Y.; Wehle, S.; Williams, K. M.; Won, E.; Yamamoto, H.; Yamaoka, J.; Yashchenko, S.; Yusa, Y.; Zhang, Z. P.; Zhilich, V.; Zupanc, A.

    2015-01-01

    We search for the decay B0s??? and measure the branching fraction for B0s??? using 121.4~fb-1 of data collected at the ?(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The B0s??? branching fraction is measured to be (3.6±0.5(stat.)±0.3(syst.)±0.6(fs))×10-5, where fs is the fraction of Bs(*)B¯s(*) in bb¯ events. Our result is in good agreement with the theoretical predictions as well as with a recent measurement from LHCb. We observe no statistically significant signal for the decay B0s??? and set a 90% confidence-level upper limit on its branching fraction at 3.1×10-6. This constitutes a significant improvement over the previous result.

  13. High resolution, shallow seismic reflection survey of the Pen Branch fault

    SciTech Connect (OSTI)

    Stieve, A.

    1991-05-15

    The purpose of this project, at the Savannah River River Site (SRS) was to acquire, process, and interpret 28 km (17.4 miles) of high resolution seismic reflection data taken across the trace of the Pen Branch fault and other suspected, intersecting north-south trending faults. The survey was optimized for the upper 300 ft of geologic strata in order to demonstrate the existence of very shallow, flat lying horizons, and to determine the depth of the fault or to sediments deformed by the fault. Field acquisition and processing parameters were selected to define small scale spatial variability and structural features in the vicinity of the Pen Branch fault leading to the definition and the location of the Pen Branch fault, the shallowest extent of the fault, and the quantification of the sense and magnitude of motion. Associated geophysical, borehole, and geologic data were incorporated into the investigation to assist in the determination of optimal parameters and aid in the interpretation.

  14. Specific heat amplitude ratios for anisotropic Lifshitz critical behaviors

    E-Print Network [OSTI]

    Marcelo M. Leite

    2003-04-03

    We determine the specific heat amplitude ratio near a $m$-axial Lifshitz point and show its universal character. Using a recent renormalization group picture along with new field-theoretical $\\epsilon_{L}$-expansion techniques, we established this amplitude ratio at one-loop order. We estimate the numerical value of this amplitude ratio for $m=1$ and $d=3$. The result is in very good agreement with its experimental measurement on the magnetic material $MnP$. It is shown that in the limit $m \\to 0$ it trivially reduces to the Ising-like amplitude ratio.

  15. Dual equilibrium in a finite aspect ratio tokamak

    E-Print Network [OSTI]

    Gourdain, P A

    2008-01-01

    achievable in conventional tokamaks. Previous research hasin a ?nite aspect ratio tokamak P. -A. Gourdain a , b ,? ,fusion reactor is the tokamak concept, a closed magnetic

  16. Benefits and Drawbacks of Compression Ratio Reduction in PCCI...

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

    Application in an Advanced LD Diesel Engine Benefits and Drawbacks of Compression Ratio Reduction in PCCI Combustion Application in an Advanced LD Diesel Engine Study of the...

  17. Neutrino Flavor Ratios Modified by Cosmic Ray Re-acceleration

    E-Print Network [OSTI]

    Kawanaka, Norita

    2015-01-01

    Re-acceleration of $\\pi$'s and $\\mu$'s modifies the flavor ratio at Earth (at astrophysical sources) of neutrinos produced by $\\pi$ decay, $\

  18. The Effects of Fuel Composition and Compression Ratio on Thermal...

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

    Ratio on Energy Efficiency Non-Petroleum Based Fuel Effects on Advanced Combustion Load Expansion of Stoichiometric HCCI Using Spark Assist and Hydraulic Valve Actuation...

  19. Uplifting the baryonic branch: a test for backreacting anti-D3-branes

    E-Print Network [OSTI]

    Anatoly Dymarsky; Stefano Massai

    2013-09-30

    Placing D3 or anti-D3-branes at the tip of the Klebanov-Strassler background results in uplifting the baryonic branch of the moduli space of the dual field theory. In this paper we derive a mass formula for the scalar particle associated with the motion along the baryonic branch, from both open and closed string points of view. We show that both methods give the same mass at linear order in number of (anti)D3-branes, thus providing a comprehensive check for the recently found linearized supergravity solution describing backreacting anti-D3-branes at the tip.

  20. Measurement of branching fractions and rate asymmetries in the rare decays B?K(*)l?l?

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Lees, J. P.; Poireau, V.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D. N.; Kerth, L. T.; et al

    2012-08-24

    In a sample of 471×10? BB¯¯¯ events collected with the BABAR detector at the PEP-II e?e? collider we study the rare decays B?K(*)l?l?, where l?l? is either e?e? or ????. We report results on partial branching fractions and isospin asymmetries in seven bins of dilepton mass-squared. We further present CP and lepton-flavor asymmetries for dilepton masses below and above the J/? resonance. We find no evidence for CP or lepton-flavor violation. The partial branching fractions and isospin asymmetries are consistent with the Standard Model predictions and with results from other experiments.

  1. Sex ratios in fetuses and liveborn infants with autosomal aneuploidy

    SciTech Connect (OSTI)

    Heuther, C.A.; Martin, R.L.M.; Stoppelman, S.M. [Univ. of Cincinnati, OH (United States)] [and others

    1996-06-14

    Ten data sources were used substantially to increase the available data for estimating fetal and livebirth sex ratios for Patau (trisomy 13), Edwards (trisomy 18), and Down (trisomy 21) syndromes and controls. The fetal sex ratio estimate was 0.88 (N = 584) for trisomy 13, 0.90 (N = 1702) for trisomy 18, and 1.16 (N = 3154) for trisomy 21. All were significantly different from prenatal controls (1.07). The estimated ratios in prenatal controls were 1.28 (N = 1409) for CVSs and 1.06 (N = 49427) for amniocenteses, indicating a clear differential selection against males, mostly during the first half of fetal development. By contrast, there were no sex ratio differences for any of the trisomies when comparing gestational ages <16 and >16 weeks. The livebirth sex ratio estimate was 0.90 (N = 293) for trisomy 13, 0.63 (N = 497) for trisomy 18, and 1.15 (N = 6424) for trisomy 21, the latter two being statistically different than controls (1.05) (N = 3660707). These ratios for trisomies 13 and 18 were also statistically different than the ratio for trisomy 21. Only in trisomy 18 did the sex ratios in fetuses and livebirths differ, indicating a prenatal selection against males >16 weeks. No effects of maternal age or race were found on these estimates for any of the fetal or livebirth trisomies. Sex ratios for translocations and mosaics were also estimated for these aneuploids. Compared to previous estimates, these results are less extreme, most likely because of larger sample sizes and less sample bias. They support the hypothesis that these trisomy sex ratios are skewed at conception, or become so during embryonic development through differential intrauterine selection. The estimate for Down syndrome livebirths is also consistent with the hypothesis that its higher sex ratio is associated with paternal nondisjunction. 36 refs., 5 tabs.

  2. A two transition state model for radical-molecule reactions : applications to isomeric branching in the OH-isoprene reaction.

    SciTech Connect (OSTI)

    Greenwald, E. E.; North, S. W.; Georgievskii, Y.; Klippenstein, S. J.; Chemistry; Texas A&M Univ.; SNL

    2007-06-28

    A two transition state model is applied to the prediction of the isomeric branching in the addition of hydroxyl radical to isoprene. The outer transition state is treated with phase space theory fitted to long-range transition state theory calculations on an electrostatic potential energy surface. High-level quantum chemical estimates are applied to the treatment of the inner transition state. A one-dimensional master equation based on an analytic reduction from two-dimensions for a particular statistical assumption about the rotational part of the energy transfer kernel is employed in the calculation of the pressure dependence of the addition process. We find that an accurate treatment of the two separate transition state regions, at the energy and angular momentum resolved level, is essential to the prediction of the temperature dependence of the addition rate. The transition from a dominant outer transition state to a dominant inner transition state is shown to occur at about 275 K, with significant effects from both transition states over the 30-500 K temperature range. Modest adjustments in the ab initio predicted inner saddle point energies yield predictions that are in quantitative agreement with the available high-pressure limit experimental observations and qualitative agreement with those in the falloff regime. The theoretically predicted capture rate is reproduced to within 10% by the expression [1.71 x 10-10(T/298)-2.58 exp(-608.6/RT) + 5.47 x 10-11(T/298)-1.78 exp(-97.3/RT); with R = 1.987 and T in K] cm3 molecule-1 s-1 over the 30-500 K range. A 300 K branching ratio of 0.67:0.02:0.02:0.29 was determined for formation of the four possible OH-isoprene adduct isomers 1, 2, 3, and 4, respectively, and was found to be relatively insensitive to temperature. An Arrhenius activation energy of -0.77 kcal/mol was determined for the high-pressure addition rate constants around 300 K.

  3. Revision of the Branch Technical Position on Concentration Averaging and Encapsulation - 12510

    SciTech Connect (OSTI)

    Heath, Maurice; Kennedy, James E.; Ridge, Christianne; Lowman, Donald [U.S. NRC, Washington, DC, 20555-0001 (United States); Cochran, John [Sandia National Laboratory (United States)

    2012-07-01

    The U.S. Nuclear Regulatory Commission (NRC) regulation governing low-level waste (LLW) disposal, 'Licensing Requirements for Land Disposal of Radioactive Waste', 10 CFR Part 61, establishes a waste classification system based on the concentration of specific radionuclides contained in the waste. The regulation also states, at 10 CFR 61.55(a)(8), that, 'the concentration of a radionuclide (in waste) may be averaged over the volume of the waste, or weight of the waste if the units are expressed as nanocuries per gram'. The NRC's Branch Technical Position on Concentration Averaging and Encapsulation provides guidance on averaging radionuclide concentrations in waste under 10 CFR 61.55(a)(8) when classifying waste for disposal. In 2007, the NRC staff proposed to revise the Branch Technical Position on Concentration Averaging and Encapsulation. The Branch Technical Position on Concentration Averaging and Encapsulation is an NRC guidance document for averaging and classifying wastes under 10 CFR 61. The Branch Technical Position on Concentration Averaging and Encapsulation is used by nuclear power plants (NPPs) licensees and sealed source users, among others. In addition, three of the four U.S. LLW disposal facility operators are required to honor the Branch Technical Position on Concentration Averaging and Encapsulation as a licensing condition. In 2010, the Commission directed the staff to develop guidance regarding large scale blending of similar homogenous waste types, as described in SECY-10-0043 as part of its Branch Technical Position on Concentration Averaging and Encapsulation revision. The Commission is improving the regulatory approach used in the Branch Technical Position on Concentration Averaging and Encapsulation by moving towards a making it more risk-informed and performance-based approach, which is more consistent with the agency's regulatory policies. Among the improvements to the Branch Technical Position on Concentration Averaging and Encapsulation are more risk-informed limits for the sizes of sealed sources for safe disposal. Using more realistic intruder exposure scenarios, the suggested limits for Class B and C waste disposal of sealed sources, particularly Cs-137 and Co-60, have been increased. These suggested changes, and others in the Branch Technical Position on Concentration Averaging and Encapsulation, if adopted by Agreement States, have the potential to eliminate numerous orphan sources (i.e., sources that currently have no disposal pathway) that are now being stored. Permanent disposal of these sources, rather than temporary storage, will help reduce safety and security risks. The revised Branch Technical Position on Concentration Averaging and Encapsulation has an alternative approach section which provides flexibility to generators and processors, while also ensuring that intruder protection will be maintained. Alternative approaches provide flexibility by allowing for consideration of likelihood of intrusion, the possibility of averaging over larger volumes and allowing for disposal of large activity sources. The revision has improved the organization of the Branch Technical Position on Concentration Averaging and Encapsulation, improved its clarity, better documented the bases for positions, and made the positions more risk informed while also maintaining protection for intruder as required by 10 CFR Part 61. (authors)

  4. NISTIR 6045 Method for Estimating the Energy Efficiency Ratio of

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    NISTIR 6045 Method for Estimating the Energy Efficiency Ratio of Mixed System Air Conditioners and Technology #12;NISTIR 6045 Method for Estimating the Energy Efficiency Ratio of Mixed System Air Conditioners combination, an empirically based calculation procedure may be used for estimating a unit's Energy Efficiency

  5. Sex ratio adjustment and kin discrimination in malaria parasites

    E-Print Network [OSTI]

    Gardner, Andy

    ARTICLES Sex ratio adjustment and kin discrimination in malaria parasites Sarah E. Reece1. These parasites must undergo sexual reproduction to transmit from vertebrate hosts to vectors, and their sex ratios are consistently female-biased. Sex allocation theory, a cornerstone of evolutionary biology

  6. Branching fractions and CP-violating asymmetries in radiative B decays to eta K gamma

    E-Print Network [OSTI]

    Zhao, M.

    We present measurements of the CP-violation parameters S and C for the radiative decay B0-->etaKS0gamma; for B-->etaKgamma we also measure the branching fractions and for B+-->etaK+gamma the time-integrated charge asymmetry ...

  7. PARETO GENEALOGIES ARISING FROM A POISSON BRANCHING EVOLUTION MODEL WITH SELECTION

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    PARETO GENEALOGIES ARISING FROM A POISSON BRANCHING EVOLUTION MODEL WITH SELECTION THIERRY E processes (and their scaling limits) may be viewed as the genealogical processes of some forward in time the reproduction step. Running title: Pareto genealogies in a Poisson evolution model with se- lection. Keywords

  8. A CP Based Branching Tool for Breaking Symmetries in Crude-Oil Operations Scheduling

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    A CP Based Branching Tool for Breaking Symmetries in Crude-Oil Operations Scheduling Sylvain Mouret Goals Optimize the schedule of operations for the crude-oil unloading and blending problem using in the MINLP model Use CP inference techniques to improve performance 1 / 14 #12;Crude-oil operations

  9. A stepped leader model for lightning including charge distribution in branched channels

    SciTech Connect (OSTI)

    Shi, Wei; Zhang, Li [School of Electrical Engineering, Shandong University, Jinan 250061 (China); Li, Qingmin, E-mail: lqmeee@ncepu.edu.cn [Beijing Key Lab of HV and EMC, North China Electric Power University, Beijing 102206 (China); State Key Lab of Alternate Electrical Power System with Renewable Energy Sources, Beijing 102206 (China)

    2014-09-14

    The stepped leader process in negative cloud-to-ground lightning plays a vital role in lightning protection analysis. As lightning discharge usually presents significant branched or tortuous channels, the charge distribution along the branched channels and the stochastic feature of stepped leader propagation were investigated in this paper. The charge density along the leader channel and the charge in the leader tip for each lightning branch were approximated by introducing branch correlation coefficients. In combination with geometric characteristics of natural lightning discharge, a stochastic stepped leader propagation model was presented based on the fractal theory. By comparing simulation results with the statistics of natural lightning discharges, it was found that the fractal dimension of lightning trajectory in simulation was in the range of that observed in nature and the calculation results of electric field at ground level were in good agreement with the measurements of a negative flash, which shows the validity of this proposed model. Furthermore, a new equation to estimate the lightning striking distance to flat ground was suggested based on the present model. The striking distance obtained by this new equation is smaller than the value estimated by previous equations, which indicates that the traditional equations may somewhat overestimate the attractive effect of the ground.

  10. Implications of LDPE Branching and Mw on Thermal and Mechanical Properties of PP/LDPE Blends

    E-Print Network [OSTI]

    Hussein, Ibnelwaleed A.

    polyethylene; molecular weight; polypropylene; short chain branching Introduction Polymer blending polymers with different molecular characteristics.[1­3] Even though blends of polypropylene (PP) and polyethylene (PE) are common espe- cially in waste recycling due to large volume consumption of polyolefins,[4

  11. BINARY BLUE METAL-POOR STARS: EVIDENCE FOR ASYMPTOTIC GIANT BRANCH MASS TRANSFER

    E-Print Network [OSTI]

    Cowan, John

    BINARY BLUE METAL-POOR STARS: EVIDENCE FOR ASYMPTOTIC GIANT BRANCH MASS TRANSFER Christopher Sneden We present new abundance analyses of six blue metal-poor (BMP) stars with very low iron abundances possess a small number of so-called blue stragglers--main-sequence stars that are clearly bluer

  12. VEGETATED ROOFS FOR URBAN ECOSYSTEM REMEDIATION: PERFORMANCE AND POLICY IN THE TANYARD BRANCH WATERSHED

    E-Print Network [OSTI]

    Rosemond, Amy Daum

    VEGETATED ROOFS FOR URBAN ECOSYSTEM REMEDIATION: PERFORMANCE AND POLICY IN THE TANYARD BRANCH the urbanization process. This study evaluated the performance and feasibility of using vegetated or green roof systems for urban ecosystem remediation. The stormwater retention performance of a thin-layer green roof

  13. Relating Airway Diameter Distributions to Regular Branching Asymmetry in the Lung Arnab Majumdar,1,2

    E-Print Network [OSTI]

    Buldyrev, Sergey

    Relating Airway Diameter Distributions to Regular Branching Asymmetry in the Lung Arnab Majumdar,1 as a function of generation N in asymmetric airway trees of mammalian lungs. We find that the airway]. Most models of the lung airway tree either do not address the observed diameter heterogeneity or simply

  14. Harbor Branch researcher on top of bottom life ahead of oil spill

    E-Print Network [OSTI]

    Fernandez, Eduardo

    Harbor Branch researcher on top of bottom life ahead of oil spill By Ed Killer Saturday, June 12 like if touched by an underwater plume of oil. No doubt, much of it would be gone forever. Reed inhabiting the reefs, Reed hoped the oil would not be swept around the tip of Florida and onto the fragile

  15. CLNS 05/1914 Measurement of Absolute Hadronic Branching Fractions of D

    E-Print Network [OSTI]

    a double tag technique. Among measurements for three D 0 and six D + modes, we obtain reference branching fractions B(D 0 ! K \\Gamma Ã? + ) = (3:91 \\Sigma 0:08 \\Sigma 0:09)% and B(D + ! K \\Gamma Ã? + Ã? + ) = (9:5 \\Sigma 0:2 \\Sigma 0:3)%, where the uncertainties are stati

  16. Inhomogeneous cyclotron emission source for the five branch mode conversion problem

    E-Print Network [OSTI]

    Ng, Chung-Sang

    Inhomogeneous cyclotron emission source for the five branch mode conversion problem C. S. Ng, V. F; accepted 20 January 1995) Recent results on determining the spatial profile of the emission source. Recent developments in mode conversion theory as ap- plied to spontaneous emission from inhomogeneously

  17. Two Branch & Bound Methods for a Generalized Class of Location-Allocation

    E-Print Network [OSTI]

    Gugat, Martin

    Two Branch & Bound Methods for a Generalized Class of Location-Allocation Problems Martin Bischoff a generalized class of location-allocation problems, in which N new facilities are to be located in the plane with respect to M objects. We assume each object to be associated with a non-negative convex cost function

  18. Lifeasweknowit To understand the human genome, researchers must spread their wings to all branches of life.

    E-Print Network [OSTI]

    Pratt, Vaughan

    and a worm to its ENCODE project, which aims to catalogue all the functional parts of the human genome is moving more forcefully into purely human genomics. The biggest new projects recently announcedLifeasweknowit To understand the human genome, researchers must spread their wings to all branches

  19. Dynamic Rupture through a Branched Fault Configuration at Yucca Mountain, and Resulting Ground Motions

    E-Print Network [OSTI]

    Dynamic Rupture through a Branched Fault Configuration at Yucca Mountain, and Resulting Ground of Yucca Mountain, Nevada, a potential site for a high-level radioactive waste repository. The Solitario km away from the SCF beneath the crest of Yucca Mountain, causing the repository site to experience

  20. Extreme-value statistics of dimensions determining an observer's branch of the world?

    E-Print Network [OSTI]

    Lutz Polley

    2010-11-16

    In a many-worlds framework, combining decoherent histories and extreme-value statistics, it is conjectured that the (matrix) dimension of the Hamiltonian processing records and memories near the end of an observer's history is almost entirely located in a single branch of his/her wavefunction.

  1. Measurement of the absolute branching fraction for D(0) -> K- pi+

    E-Print Network [OSTI]

    Ammar, Raymond G.; Ball, S.; Baringer, Philip S.; Coppage, Don; Copty, N.; Davis, Robin E. P.; Hancock, N.; Kelly, M.; Kwak, Nowhan; Lam, H.

    1993-11-01

    Using 1.79 fb-1 of data recorded by the CLEO II detector we have measured the absolute branching fraction for D0 --> K-pi+. The angular correlation between the pi+ emitted in the decay D*+ --> D0pi+, and the jet direction in e+e- --> ccBAR events...

  2. An Additive Branch-and-Bound Algorithm for the Pickup and Delivery Traveling Salesman Problem

    E-Print Network [OSTI]

    Carrabs, Francesco

    in the management of automatic guided vehicles that load items on one end and unload them at the other end [Erdogan with LIFO or FIFO Loading Francesco Carrabs and Raffaele Cerulli Dipartimento di Matematica ed Informatica This paper introduces an additive branch-and-bound algorithm for two variants of the pickup and delivery

  3. Jeff Doerzbacher 1J 505 Oak Branch Drive. Austin. Texas 78737

    E-Print Network [OSTI]

    Jeff Doerzbacher 1J 505 Oak Branch Drive. Austin. Texas 78737 Albert W. Green Environment Assessment. Texas Parks and Wildlife Department 4200 Smith School Road. Austin. Texas 78744 Robert S. Jones Marine Science Institute. University of Texas at Austin P.O. Box 1267. Port Aransas. Texas 78373 Gary C

  4. STATISTICAL ESTIMATION OF CASCADING BLACKOUT SIZE AND PROPAGATION WITH BRANCHING PROCESSES

    E-Print Network [OSTI]

    STATISTICAL ESTIMATION OF CASCADING BLACKOUT SIZE AND PROPAGATION WITH BRANCHING PROCESSES by Kevin Processes with Power Systems . . . . . . . . . . . . . . . . 3 1.1.2 Additional Cascading Blackout Research and . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.2.2 Estimating blackout size pdf . . . . . . . . . . . . . . . . . . . . . . . 18 3.2.3 Note

  5. PPPL-3137 -Preprint Date: November1995, UC-420, 426 Observation of new branch of

    E-Print Network [OSTI]

    . M. McGuire, R. Majeski, C. K. Phillips, G. Schilling, G Taylor, and J. R. Wilson Princeton Plasma Eigenmodes in TFTR E Fredrickson, R Budny, Z Chang, C Z Cheng, G Y Fu, E Mazzucato, R Nazikian, A. Janos, K eigenmodes as reported by Taylor et al. Phys. Fluids B 5 2437 (1993). The new branch has so far only been

  6. PPPL3137 Preprint Date: November1995, UC420, 426 Observation of new branch of

    E-Print Network [OSTI]

    . M. McGuire, R. Majeski, C. K. Phillips, G. Schilling, G Taylor, and J. R. Wilson Princeton Plasma Eigenmodes in TFTR E Fredrickson, R Budny, Z Chang, C Z Cheng, G Y Fu, E Mazzucato, R Nazikian, A. Janos, K eigenmodes as reported by Taylor et al. Phys. Fluids B 5 2437 (1993). The new branch has so far only been

  7. Side branch absorber for exhaust manifold of two-stroke internal combustion engine

    DOE Patents [OSTI]

    Harris, Ralph E. (San Antonio, TX); Broerman, III, Eugene L. (San Antonio, TX); Bourn, Gary D. (Laramie, WY)

    2011-01-11

    A method of improving scavenging operation of a two-stroke internal combustion engine. The exhaust pressure of the engine is analyzed to determine if there is a pulsation frequency. Acoustic modeling is used to design an absorber. An appropriately designed side branch absorber may be attached to the exhaust manifold.

  8. Branch-cut singularities in the thermodynamics of Fermi liquid systems

    E-Print Network [OSTI]

    Fominov, Yakov

    #12;Search for non analyticity: If f is smooth and regular in the vicinity of f=0, the standard-analyticities associated with branch-cuts enter via ring diagrams, i.e., ladders which are closed onto themselves p+q p -p, the dominant terms are generated in the thermodynamic potential. In ladders the non- analyticities associated

  9. Bayesian Reconstruction of Two-Sex Populations by Age: Estimating Sex Ratios at Birth and Sex Ratios of

    E-Print Network [OSTI]

    Raftery, Adrian

    Bayesian Reconstruction of Two-Sex Populations by Age: Estimating Sex Ratios at Birth and Sex past with uncertainty, produced estimates for female-only populations. Here we show how two-sex populations can be similarly reconstructed and probabilistic estimates of various sex ratio quantities

  10. AN ALTERNATIVE TO BRANCH PREDICTION: PRE-COMPUTED Lucian N. VINTAN*, Marius SBERA**, Ioan Z. MIHU*, Adrian FLOREA*

    E-Print Network [OSTI]

    Vintan, Lucian N.

    predictors are composed of a single level, such as a classical Branch Target Cache (BTC), or even two levels, such as the Two-Level Adaptive Branch Predictors [8,9,10]. A BTC predicts (Taken/Not Taken and the corresponding

  11. Facile Conversion Synthesis of Densely-Formed Branched ZnO-Nanowire Arrays for Quantum-Dot-Sensitized Solar Cells

    E-Print Network [OSTI]

    Park, Byungwoo

    by the densely-formed branched nanowires. The correlations between the branched nanostructures and photovoltaic nanowire building blocks with well-defined structures and compositions are the central tasks for the fabrication of nanoelectronic and photovoltaic devices [1­8]. Compared to the simple one-dimen- sional (1-D

  12. Potential for Branch Predictor Adaptation at the Program and Phase Level for Performance and Energy-Efficiency

    E-Print Network [OSTI]

    Huang, Wei

    Potential for Branch Predictor Adaptation at the Program and Phase Level for Performance and Energy-Efficiency savings were performed. The performance and energy- efficiency of an 8-wide issue, out-of-order processor of the branch predictor configuration to improve overall processor energy- efficiency. The results

  13. A COST-EFFECTIVE TWO-LEVEL ADAPTIVE BRANCH PREDICTOR STEVEN, G. B., EGAN, C., SHIM, W. VINTAN, L.

    E-Print Network [OSTI]

    Vintan, Lucian N.

    - 1 - A COST-EFFECTIVE TWO-LEVEL ADAPTIVE BRANCH PREDICTOR STEVEN, G. B., EGAN, C., SHIM, W. VINTAN.B.Steven@herts.ac.uk wonshim@duck.snut.ac.kr vintan@cs.sibiu.ro ABSTRACT During the 1990s Two-level Adaptive Branch Predictors processors. However, while two-level adaptive predictors achieve very high prediction rates, they tend

  14. Measurement of the production cross section ratio ?(?b2(1P)) / ?(?b1(1P)) in pp collisions at ?s = 8 TeV

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Khachatryan, Vardan [Yerevan Physics Inst. (Armenia)

    2015-04-01

    A measurement of the production cross section ratio ?(?b2(1P)) / ?(?b1(1P)) is presented. The ?b1 (1P) and ?b2(1P) bottomonium states, promptly produced in pp collisions at ?s=8 TeV , are detected by the CMS experiment at the CERN LHC through their radiative decays ?b1,2(1P) ? ?(1S) + ? . The emitted photons are measured through their conversion to e?e? pairs, whose reconstruction allows the two states to be resolved. The ?(1S) is measured through its decay to two muons. An event sample corresponding to an integrated luminosity of 20.7 fb?¹ is used to measure the cross section ratio in a phase-space region defined by the photon pseudorapidity, |??| ?| T? ?b branching fractions.

  15. Measurement of the production cross section ratio ?(?b2(1P)) / ?(?b1(1P)) in pp collisions at ?s = 8 TeV

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Khachatryan, Vardan

    2015-04-09

    A measurement of the production cross section ratio ?(?b2(1P)) / ?(?b1(1P)) is presented. The ?b1 (1P) and ?b2(1P) bottomonium states, promptly produced in pp collisions at ?s=8 TeV , are detected by the CMS experiment at the CERN LHC through their radiative decays ?b1,2(1P) ? ?(1S) + ? . The emitted photons are measured through their conversion to e?e? pairs, whose reconstruction allows the two states to be resolved. The ?(1S) is measured through its decay to two muons. An event sample corresponding to an integrated luminosity of 20.7 fb?¹ is used to measure the cross section ratio in amore »phase-space region defined by the photon pseudorapidity, |??| ?| T? ?b branching fractions.« less

  16. The Slow:Fast substitution ratio reveals changing patterns of natural selection in gamma-proteobacterial genomes

    SciTech Connect (OSTI)

    Alm, Eric; Shapiro, B. Jesse

    2009-04-15

    Different microbial species are thought to occupy distinct ecological niches, subjecting each species to unique selective constraints, which may leave a recognizable signal in their genomes. Thus, it may be possible to extract insight into the genetic basis of ecological differences among lineages by identifying unusual patterns of substitutions in orthologous gene or protein sequences. We use the ratio of substitutions in slow versus fast-evolving sites (nucleotides in DNA, or amino acids in protein sequence) to quantify deviations from the typical pattern of selective constraint observed across bacterial lineages. We propose that elevated S:F in one branch (an excess of slow-site substitutions) can indicate a functionally-relevant change, due to either positive selection or relaxed evolutionary constraint. In a genome-wide comparative study of gamma-proteobacterial proteins, we find that cell-surface proteins involved with motility and secretion functions often have high S:F ratios, while information-processing genes do not. Change in evolutionary constraints in some species is evidenced by increased S:F ratios within functionally-related sets of genes (e.g., energy production in Pseudomonas fluorescens), while other species apparently evolve mostly by drift (e.g., uniformly elevated S:F across most genes in Buchnera spp.). Overall, S:F reveals several species-specific, protein-level changes with potential functional/ecological importance. As microbial genome projects yield more species-rich gene-trees, the S:F ratio will become an increasingly powerful tool for uncovering functional genetic differences among species.

  17. Chloride-Magnesium Ratio of Shallow Groundwaters as a Regional...

    Open Energy Info (EERE)

    Chloride-Magnesium Ratio of Shallow Groundwaters as a Regional Geothermal Indicator in Hawaii Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article:...

  18. The Ne/O abundance ratio in the quiet Sun

    E-Print Network [OSTI]

    P. R. Young

    2005-10-10

    Aims: To determine the neon-to-oxygen abundance in the quiet Sun, a proxy for the photospheric abundance ratio. Method: An emission measure method applied to extreme ultraviolet emission lines of Ne IV-VI and O III-V ions observed by the Coronal Diagnostic Spectrometer on the SOHO satellite. Results: The average Ne/O abundance ratio in supergranule cell centre regions is 0.18 +/- 0.05, while in supergranule network regions is 0.16 +/- 0.04. A photospheric Ne/O ratio of 0.17 +/- 0.05 is suggested, in good agreement with the most recent compilation of solar photospheric abundances, but discrepant with a recent Ne/O ratio derived from stellar X-ray spectra and revised neon abundances suggested from solar interior models.

  19. Unsafe but calculable: ratios of angularities in perturbative QCD

    E-Print Network [OSTI]

    Thaler, Jesse

    Infrared- and collinear-safe (IRC-safe) observables have finite cross sections to each fixed-order in perturbative QCD. Generically, ratios of IRC-safe observables are themselves not IRC safe and do not have a valid ...

  20. Design studies of low aspect ratio quasi-omnigenous stellarators

    E-Print Network [OSTI]

    Martín-Solís, José Ramón

    optimization principles for the design of a more attractive reactor. These are 3 and 4 field period low aspect] produced low aspect ratio stellarator configurations that had promising features for a reactor (stable

  1. An Asymptotic Model for the English Hapax/Vocabulary Ratio

    E-Print Network [OSTI]

    Squibs An Asymptotic Model for the English Hapax/Vocabulary Ratio Fan Fengxiang Dalian Maritime Languages, Dalian Maritime University, Dalian, China. E-mail: fanfengxiang@yahoo.com. Submission received: 5

  2. Aspect ratio dependence of electromechanical coupling coefficient of piezoelectric resonators

    E-Print Network [OSTI]

    Cao, Wenwu

    Aspect ratio dependence of electromechanical coupling coefficient of piezoelectric resonators important parameter characterizing a piezoelectric material is the electromechanical coupling coefficient of Physics. DOI: 10.1063/1.2053366 The electromechanical coupling coefficient of piezoelec- tric materials

  3. Rapid Replication of High Aspect Ratio Molds for UV Embossing

    E-Print Network [OSTI]

    Yan, Yehai

    This paper describes a promising fabrication technique for rapid replication of high aspect ratio microstructured molds for UV embossing. The process involves casting silicone rubber on a microstructured master, replicating ...

  4. Minimum Chaperone to Student Ratio and Costs Reserved Tours

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    SH 7/08 Minimum Chaperone to Student Ratio and Costs Reserved Tours Use the table below Costs Preschool 1 adult/4 students Ages 3 and under: free, Students ages 4 and up: $4 each, Adults: $6

  5. EVOLUTION, NUCLEOSYNTHESIS, AND YIELDS OF LOW-MASS ASYMPTOTIC GIANT BRANCH STARS AT DIFFERENT METALLICITIES. II. THE FRUITY DATABASE

    SciTech Connect (OSTI)

    Cristallo, S.; Dominguez, I.; Abia, C. [Departamento de Fisica Teorica y del Cosmos, Universidad de Granada, 18071 Granada (Spain); Piersanti, L.; Straniero, O.; Gallino, R.; Di Rico, G.; Quintini, M. [INAF-Osservatorio Astronomico di Collurania, 64100 Teramo (Italy); Bisterzo, S. [Dipartimento di Fisica Generale, Universita di Torino, 10125 Torino (Italy)

    2011-12-01

    By using updated stellar low-mass stars models, we systematically investigate the nucleosynthesis processes occurring in asymptotic giant branch (AGB) stars. In this paper, we present a database dedicated to the nucleosynthesis of AGB stars: FRANEC Repository of Updated Isotopic Tables and Yields (FRUITY). An interactive Web-based interface allows users to freely download the full (from H to Bi) isotopic composition, as it changes after each third dredge-up (TDU) episode and the stellar yields the models produce. A first set of AGB models, having masses in the range 1.5 {<=}M/M{sub Sun} {<=} 3.0 and metallicities 1 Multiplication-Sign 10{sup -3} {<=} Z {<=} 2 Multiplication-Sign 10{sup -2}, is discussed. For each model, a detailed description of the physical and the chemical evolution is provided. In particular, we illustrate the details of the s-process and we evaluate the theoretical uncertainties due to the parameterization adopted to model convection and mass loss. The resulting nucleosynthesis scenario is checked by comparing the theoretical [hs/ls] and [Pb/hs] ratios to those obtained from the available abundance analysis of s-enhanced stars. On the average, the variation with the metallicity of these spectroscopic indexes is well reproduced by theoretical models, although the predicted spread at a given metallicity is substantially smaller than the observed one. Possible explanations for such a difference are briefly discussed. An independent check of the TDU efficiency is provided by the C-stars luminosity function. Consequently, theoretical C-stars luminosity functions for the Galactic disk and the Magellanic Clouds have been derived. We generally find good agreement with observations.

  6. TOKAMAK REACTOR DESIGNS AS A FUNCTION OF ASPECT RATIO

    E-Print Network [OSTI]

    California at Los Angeles, University of

    GA­A23168 TOKAMAK REACTOR DESIGNS AS A FUNCTION OF ASPECT RATIO by C.P.C. WONG and R.D. STAMBAUGH or reflect those of the United States Government or any agency thereof. #12;GA­A23168 TOKAMAK REACTOR DESIGNS JULY 1999 #12;C.P.C. WONG AND R.D. STAMBAUGH TOKAMAK REACTOR DESIGNS AS A FUNCTION OF ASPECT RATIO

  7. System and method for high precision isotope ratio destructive analysis

    SciTech Connect (OSTI)

    Bushaw, Bruce A; Anheier, Norman C; Phillips, Jon R

    2013-07-02

    A system and process are disclosed that provide high accuracy and high precision destructive analysis measurements for isotope ratio determination of relative isotope abundance distributions in liquids, solids, and particulate samples. The invention utilizes a collinear probe beam to interrogate a laser ablated plume. This invention provides enhanced single-shot detection sensitivity approaching the femtogram range, and isotope ratios that can be determined at approximately 1% or better precision and accuracy (relative standard deviation).

  8. Increasing the transformer ratio at the Argonne wakefield accelerator.

    SciTech Connect (OSTI)

    Power, J.G.; Conde, M.; Liu, W.; Yusof, Z.; Gai, W.; Jing, C.; Kanareykin, A. (High Energy Physics); (Euclid Techlabs, LLC)

    2011-01-01

    The transformer ratio is defined as the ratio of the maximum energy gain of the witness bunch to the maximum energy loss experienced by the drive bunch (or a bunch within a multidrive bunch train). This plays an important role in the collinear wakefield acceleration scheme. A high transformer ratio is desirable since it leads to a higher overall efficiency under similar conditions (e.g. the same beam loading, the same structure, etc.). One technique to enhance the transformer ratio beyond the ordinary limit of 2 is to use a ramped bunch train. The first experimental demonstration observed a transformer ratio only marginally above 2 due to the mismatch between the drive microbunch length and the frequency of the accelerating structure [C. Jing, A. Kanareykin, J. Power, M. Conde, Z. Yusof, P. Schoessow, and W. Gai, Phys. Rev. Lett. 98, 144801 (2007)]. Recently, we revisited this experiment with an optimized microbunch length using a UV laser stacking technique at the Argonne Wakefield Accelerator facility and measured a transformer ratio of 3.4. Measurements and data analysis from these experiments are presented in detail.

  9. The Operational Sex Ratio, theThe Operational Sex Ratio, the Potential Reproductive Rate, andPotential Reproductive Rate, and

    E-Print Network [OSTI]

    Shuster, Stephen M.

    of each sex willing (or able) to mate at any given time (Kemp & Macedonia 2006) The "Operational Sex Ratio 1999; Kemp & Macedonia 2007) Mate selection and choosiness: (Rosenqvist 1993; Berglund 1994; Kokko

  10. Canonical formulation of Pais-Ulhenbech action and resolving the issue of branched Hamiltonian

    E-Print Network [OSTI]

    Sarkar, Kaushik; Mandal, Ranajit; Sanyal, Abhik Kumar

    2015-01-01

    Issue of branched Hamiltonian appearing in the presence of velocities with degree higher than two in the Lagrangian, has not been resolved uniquely as yet. However, often such terms appear with higher order theory, gravity in particular. Here we show that an appropriate canonical formulation of higher order theory takes care of the issue elegantly. However, the shortcomings of Dirac's constrained analysis in the context of fourth order Pais-Ulhenbech oscillator action and the appearance of badly affected phase-space Hamiltonian for a generalized fourth order oscillator action, following Ostrogradski, Dirac and Horowitz's formalisms, require a viable canonical formulation. Hence, we propose that, the formalism which takes care of the counter surface terms obtained from variational principle, administers boundary condition, produces a quantum theory in terms of basic variables with unitary time evolution, resolving the issue of branched Hamiltonian is the viable one.

  11. Branched Microstructures in the Ginzburg-Landau Model of Type-I Superconductors

    E-Print Network [OSTI]

    Sergio Conti; Felix Otto; Sylvia Serfaty

    2015-07-03

    We consider the Ginzburg-Landau energy for a type-I superconductor in the shape of an infinite three-dimensional slab, with two-dimensional periodicity, with an applied magnetic field which is uniform and perpendicular to the slab. We determine the optimal scaling law of the minimal energy in terms of the parameters of the problem, when the applied magnetic field is sufficiently small and the sample sufficiently thick. This optimal scaling law is proven via ansatz-free lower bounds and an explicit branching construction which refines further and further as one approaches the surface of the sample. Two different regimes appear, with different scaling exponents. In the first regime, the branching leads to an almost uniform magnetic field pattern on the boundary; in the second one the inhomogeneity survives up to the boundary.

  12. Towards a mathematical definition of Coulomb branches of $3$-dimensional $\\mathcal N=4$ gauge theories, I

    E-Print Network [OSTI]

    Nakajima, Hiraku

    2015-01-01

    Consider the $3$-dimensional $\\mathcal N=4$ supersymmetric gauge theory associated with a compact Lie group $G$ and its quaternionic representation $\\mathbf M$. Physicists study its Coulomb branch, which is a noncompact hyper-K\\"ahler manifold, such as instanton moduli spaces on $\\mathbb R^4$, $SU(2)$-monopole moduli spaces on $\\mathbb R^3$, etc. In this paper and its sequel, we propose a mathematical definition of the coordinate ring of the Coulomb branch, using the vanishing cycle cohomology group of a certain moduli space for a gauged $\\sigma$-model on the $2$-sphere associated with $(G,\\mathbf M)$. In this first part, we check that the cohomology group has the correct graded dimensions expected from the monopole formula proposed by Cremonesi, Hanany and Zaffaroni arXiv:1309.2657. A ring structure (on the cohomology of a modified moduli space) will be introduced in the sequel of this paper.

  13. Single-enzyme kinetics with branched pathways: exact theory and series expansion

    E-Print Network [OSTI]

    Ashok Garai; Debashish Chowdhury

    2014-12-10

    The progress of the successive rounds of catalytic conversion of substrates into product(s) by a single enzyme is characterized by the distribution of turnover times. Establishing the most general form of dependence of this distribution on the substrate concentration [S] is one of the fundamental challenges in single molecule enzymology. The distribution of the times of dwell of a molecular motor at the successive positions on its track is an analogous quantity. We derive approximate series expansions for the [ATP]-dependence of the first two moments of the dwell time distributions of motors that catalyze hydrolysis of ATP to draw input energy. Comparison between our results for motors with branched pathways and the corresponding expressions reported earlier for linear enzymatic pathways provides deep insight into the effects of the branches. Such insight is likely to help in discovering the most general form of [S]-dependence of these fundamental distributions.

  14. Perspectives on the viscoelasticity and flow behavior of entangled linear and branched polymers

    E-Print Network [OSTI]

    Snijkers, F; Olmsted, P D; Vlassopoulos, D

    2015-01-01

    We briefly review the recent advances in the rheology of entangled polymers and identify emerging research trends and outstanding challenges, especially with respect to branched polymers. Emphasis is placed on the role of well-characterized model systems, as well as the synergy of synthesis-characterization, rheometry and modeling/simulations. The theoretical framework for understanding the observed linear and nonlinear rheological phenomena is the tube model which is critically assessed in view of its successes and shortcomings, whereas alternative approaches are briefly discussed. Finally, intriguing experimental findings and controversial issues that merit consistent explanation, such as shear banding instabilities, multiple stress overshoots in transient simple shear and enhanced steady-state elongational viscosity in polymer solutions, are discussed, whereas future directions such as branch point dynamics and anisotropic monomeric friction are outlined.

  15. E(Race)ing gender: Stratified identities 

    E-Print Network [OSTI]

    Nguyen, Le Thuy Thi

    2000-01-01

    In the discussion that follows, I will examine, on the broadest level, Hurston's complex negotiation of identity, as manifested in Their Eyes Were Watching God. Central to this investigation is an understanding of the ...

  16. Plain Speaking: The Voices of William Inge

    E-Print Network [OSTI]

    Williams, Philip M.

    2011-04-15

    from Latin America, Asia, and Europe as well as from different parts of the country, including the East Coast. Even so, I had no trouble casting the play. A handsome and muscular senior of Columbian ancestry was perfect as Hal, the handsome... perfectly; she never wore a dress to school, and despite being seventeen, she still looked as if she as on the verge of adolescence. Even casting the adult roles was easy; the girl auditioning for Mrs. Potts wrote on her casting card that she “loved...

  17. CLNS 07/2005 Measurement of Absolute Hadronic Branching Fractions of D

    E-Print Network [OSTI]

    . Among measurements for three D 0 and six D + modes, we obtain reference branching fractions B(D 0 ! K \\Gamma Ã? + ) = (3:891 \\Sigma 0:035 \\Sigma 0:059 \\Sigma 0:035)% and B(D + ! K \\Gamma Ã? + Ã? + ) = (9:14 \\Sigma 0:10 \\Sigma 0:16 \\Sigma 0:07)%, where the first uncertainty is statistical, the second is all

  18. Measurement of the D+ -> pi+pi0 and D+ -> K+pi0Branching Fractions

    SciTech Connect (OSTI)

    Aubert, B.

    2006-07-21

    We present measurements of the branching fractions for the Cabbibo suppressed decays D{sup +} {yields} {pi}{sup +}{pi}{sup 0} and D{sup +} {yields} K{sup +}{pi}{sup 0} based on a data sample corresponding to an integrated luminosity of 124.3 fb{sup -1}. The data were taken with the BABAR detector at the PEP-II B Factory operating on and near the {Upsilon}(4S) resonance. We find {Beta}(D{sup +} {yields} {pi}{sup +}{pi}{sup 0}) = (1.25 {+-} 0.10 {+-} 0.09 {+-} 0.04) x 10{sup -3} and {Beta}(D{sup +} {yields} K{sup +}{pi}{sup 0}) = (2.52 {+-} 0.47 {+-} 0.25 {+-} 0.08) x 10{sup -4}, where the first uncertainty is statistical, the second systematic and the last error is due to the uncertainties in the absolute branching fraction scale for D{sup +} mesons. This represents the first observation of the doubly Cabibbo-suppressed D{sup +} {yields} K{sup +}{pi}{sup 0} decay mode and a new measurement of the D{sup +} {yields} {pi}{sup +}{pi}{sup 0} branching fraction.

  19. Measurement of branching fraction and first evidence of CP violation in B??a?±(1260)?? decays

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Dalseno, J.; Adachi, I.; Aihara, H.; Asner, D. M.; Aulchenko, V.; Aushev, T.; Bakich, A. M.; Bay, A.; Belous, K.; Bhuyan, B.; Bozek, A.; Bra?ko, M.; Brovchenko, O.; Browder, T. E.; Chekelian, V.; Chen, A.; Chen, P.; Cheon, B. G.; Chilikin, K.; Chistov, R.; Cho, I.-S.; Cho, K.; Choi, Y.; Doležal, Z.; Drásal, Z.; Eidelman, S.; Fast, J. E.; Gaur, V.; Gabyshev, N.; Garmash, A.; Goh, Y. M.; Hayashii, H.; Horii, Y.; Hoshi, Y.; Hou, W.-S.; Hsiung, Y. B.; Hyun, H. J.; Iijima, T.; Inami, K.; Ishikawa, A.; Itoh, R.; Iwabuchi, M.; Iwasaki, Y.; Iwashita, T.; Julius, T.; Kang, J. H.; Kiesling, C.; Kim, H. O.; Kim, J. B.; Kim, Y. J.; Kinoshita, K.; Ko, B. R.; Koblitz, S.; Kodyš, P.; Korpar, S.; Križan, P.; Krokovny, P.; Kronenbitter, B.; Kuhr, T.; Kumita, T.; Kwon, Y.-J.; Lee, S.-H.; Li, J.; Libby, J.; Liu, C.; Liu, Z. Q.; Louvot, R.; MacNaughton, J.; Matvienko, D.; McOnie, S.; Miyabayashi, K.; Miyata, H.; Miyazaki, Y.; Mohanty, G. B.; Mohapatra, D.; Moll, A.; Muramatsu, N.; Nakao, M.; Natkaniec, Z.; Nedelkovska, E.; Ng, C.; Nishida, S.; Nishimura, K.; Nitoh, O.; Ogawa, S.; Ohshima, T.; Okuno, S.; Pakhlov, P.; Pakhlova, G.; Park, C. W.; Park, H. K.; Pedlar, T. K.; Pestotnik, R.; Petri?, M.; Piilonen, L. E.; Prim, M.; Prothmann, K.; Ritter, M.; Röhrken, M.; Sahoo, H.; Sakai, Y.; Sanuki, T.; Schneider, O.; Schwanda, C.; Schwartz, A. J.; Senyo, K.; Seon, O.; Sevior, M. E.; Shapkin, M.; Shebalin, V.; Shen, C. P.; Shibata, T.-A.; Shiu, J.-G.; Sibidanov, A.; Simon, F.; Smerkol, P.; Sohn, Y.-S.; Solovieva, E.; Stari?, M.; Sumihama, M.; Sumiyoshi, T.; Tatishvili, G.; Teramoto, Y.; Trabelsi, K.; Uchida, M.; Uehara, S.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Vanhoefer, P.; Varner, G.; Wang, C. H.; Wang, P.; Watanabe, M.; Watanabe, Y.; Williams, K. M.; Won, E.; Yabsley, B. D.; Yamashita, Y.; Zhang, Z. P.; Zhilich, V.; Zhulanov, V.; Zupanc, A.

    2012-11-01

    We present a measurement of the branching fraction and time-dependent CP violation parameters in B??a±?(1260)?? decays. The results are obtained from the final data sample containing 772×10? BB¯¯¯ pairs collected at the ?(4S) resonance with the Belle detector at the KEKB asymmetric-energy e?e? collider. We obtain the product branching fraction B(B??a±?(1260)??)×B(a±?(1260)??±???±)=(11.1±1.0(stat)±1.4(syst))×10?? and an upper limit on the product branching fraction for a possible decay with the same final state B(B??a±?(1320)??)×B(a±?(1320)??±???±)±? does not contain the spectator quark and those where it does. We find first evidence of mixing-induced CP violation in B??a±?(1260)?? decays with 3.1? significance. The rate where the a±? does not contain the spectator quark from the B meson is found to dominate the rate where it does at the 4.1? level. However, there is no evidence for either time- and flavor-integrated direct CP violation or flavor-dependent direct CP violation.

  20. Functional significance of octameric RuvA for a branch migration complex from Thermus thermophilus

    SciTech Connect (OSTI)

    Fujiwara, Yoshie [Graduate School of Engineering Science, Osaka University, 1-3, Machikaneyama, Toyonaka, Osaka 560-8531 (Japan); Mayanagi, Kouta [Nagahama Institute of Bio-Science and Technology, 1266 Tamura-cho, Nagahama, Shiga 526-0829 (Japan); The Takara-Bio Endowed Division, Institute for Protein Research, Osaka University, 6-2-3, Furuedai, Suita, Osaka 565-0874 (Japan); JST-BIRD, Nagahama 526-0829 (Japan); Morikawa, Kosuke [The Takara-Bio Endowed Division, Institute for Protein Research, Osaka University, 6-2-3, Furuedai, Suita, Osaka 565-0874 (Japan); CREST, JST, Sanban-cho, Chiyoda-ku, Tokyo 102-0075 (Japan)], E-mail: morikako@protein.osaka-u.ac.jp

    2008-02-08

    The RuvAB complex promotes migration of Holliday junction at the late stage of homologous recombination. The RuvA tetramer specifically recognizes Holliday junction to form two types of complexes. A single tetramer is bound to the open configuration of the junction DNA in complex I, while the octameric RuvA core structure sandwiches the same junction in complex II. The hexameric RuvB rings, symmetrically bound to both sides of RuvA on Holliday junction, pump out DNA duplexes, depending upon ATP hydrolysis. We investigated functional differences between the wild-type RuvA from Thermus thermophilus and mutants impaired the ability of complex II formation. These mutant RuvA, exclusively forming complex I, reduced activities of branch migration and ATP hydrolysis, suggesting that the octameric RuvA is essential for efficient branch migration. Together with our recent electron microscopic analysis, this finding provides important insights into functional roles of complex II in the coordinated branch migration mechanism.

  1. Measurement of branching fraction and first evidence of CP violation in B??a?±(1260)?? decays

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Dalseno, J.; Adachi, I.; Aihara, H.; Asner, D. M.; Aulchenko, V.; Aushev, T.; Bakich, A. M.; Bay, A.; Belous, K.; Bhuyan, B.; et al

    2012-11-26

    We present a measurement of the branching fraction and time-dependent CP violation parameters in B??a±?(1260)?? decays. The results are obtained from the final data sample containing 772×10? BB¯¯¯ pairs collected at the ?(4S) resonance with the Belle detector at the KEKB asymmetric-energy e?e? collider. We obtain the product branching fraction B(B??a±?(1260)??)×B(a±?(1260)??±???±)=(11.1±1.0(stat)±1.4(syst))×10?? and an upper limit on the product branching fraction for a possible decay with the same final state B(B??a±?(1320)??)×B(a±?(1320)??±???±)more »respectively. Simultaneously, we also extract the CP-conserving parameters ?C=+0.54±0.11(stat)±0.07(syst), ?S=–0.09±0.14(stat)±0.06(syst), which, respectively, describe a rate difference and strong phase difference between the decay channels where the a±? does not contain the spectator quark and those where it does. We find first evidence of mixing-induced CP violation in B??a±?(1260)?? decays with 3.1? significance. The rate where the a±? does not contain the spectator quark from the B meson is found to dominate the rate where it does at the 4.1? level. However, there is no evidence for either time- and flavor-integrated direct CP violation or flavor-dependent direct CP violation.« less

  2. Pen Branch fault program: Consolidated report on the seismic reflection surveys and the shallow drilling

    SciTech Connect (OSTI)

    Stieve, A.L.; Stephenson, D.E.; Aadland, R.K.

    1991-03-23

    The Pen Branch fault was identified in the subsurface at the Savannah River Site (SRS) in 1989 based upon interpretation of earlier seismic reflection surveys and other geologic investigations (Seismorgraph Services Incorp., 1973; Chapman and DiStefano, 1989; Snipes, Fallaw and Price, 1989). A program was initiated at that time to determine the capability of the fault to release seismic energy (Price and others, 1989) as defined in the Nuclear Regulatory Commission regulatory guidelines, 10 CFR 100 Appendix A. This report presents the results of the Pen Branch fault investigation based on data acquired from seismic reflection surveys and shallow drilling across the fault completed at this time. The Earth Science Advisory Committee (ESAC) has reviewed the results of these investigations and unanimously agrees with the conclusion of Westinghouse Savannah River Company (WSRC) that the Pen Branch fault is a non-capable fault. ESAC is a committee of 12 earth science professionals from academia and industry with the charter of providing outside peer review of SRS geotechnical, seismic, and ground water modeling programs.

  3. From statistics of regular tree-like graphs to distribution function and gyration radius of branched polymers

    E-Print Network [OSTI]

    Grosberg, Alexander Y

    2015-01-01

    We consider flexible branched polymer, with quenched branch structure, and show that its conformational entropy as a function of its gyration radius $R$, at large $R$, obeys, in the scaling sense, $\\Delta S \\sim R^2/(a^2L)$, with $a$ bond length (or Kuhn segment) and $L$ defined as an average spanning distance. We show that this estimate is valid up to at most the logarithmic correction for any tree. We do so by explicitly computing the largest eigenvalues of Kramers matrices for both regular and "sparse" 3-branched trees, uncovering on the way their peculiar mathematical properties.

  4. Genealogy of flows of continuous-state branching processes via flows of partitions and the Eve property

    E-Print Network [OSTI]

    Labbé, Cyril

    2012-01-01

    We encode the genealogy of a continuous-state branching process associated with a branching mechanism $\\Psi$ - or $\\Psi$-CSBP in short - using a stochastic flow of partitions. This encoding holds for all branching mechanisms and appears as a very tractable object to deal with asymptotic behaviours and convergences. In particular we study the so-called Eve property - the existence of an ancestor from which the entire population descends asymptotically - and give a necessary and sufficient condition on the $\\Psi$-CSBP for this property to hold. Finally, we show that the flow of partitions unifies the lookdown representation and the flow of subordinators when the Eve property holds.

  5. Observation of Enhanced Transformer Ratio in Collinear Wakefield Acceleration

    SciTech Connect (OSTI)

    Jing, C.; Kanareykin, A. [Euclid Techlabs, LLC, Solon, OH-44139 (United States); Power, J.; Conde, M.; Yusof, Z.; Gai, W. [High Energy Physics Division, Argonne National Laboratory, Argonne, IL-60439 (United States)

    2006-11-27

    The transformer ratio R is a parameter that characterizes the efficiency of the energy transferred from the drive beam to the trailing witness beam passing through a wakefield accelerating structure (all metal or dielectric based) or a plasma chamber. Using a ramped bunch train (RBT) rather than a single drive bunch, the enhanced transformer ratio (ETR) technique is able to increase the transformer ratio R above the ordinary limit of 2 for a single bunch in a collinear wakefield accelerator. The RBT is a train of electron bunches separated by half integer multiples wavelength of the wakefield. The charge of the leading bunch is lowest and subsequent bunch charges are increased in such a way as to maximize R. In this article, an experimental study of this scheme is presented in which an RBT of 2 bunches with charge ratio of 1:2.5 and bunch length {sigma}z = 2 mm were used to enhance the transformer ratio. Measurement results and data analysis show good agreement with theoretical predictions. The ETR technique demonstrated here can be used in any collinear wakefield accelerator configuration, either structure- or plasma-based.

  6. Observation of enhanced transformer ratio in collinear Wakefield acceleration.

    SciTech Connect (OSTI)

    Power, J.; Conde, M.; Yusof, Z.; Gai, W.; Jing, C.; Kanareykin, A.; High Energy Physics; Euclid Techlabs, LLC

    2006-01-01

    The transformer ratio R is a parameter that characterizes the efficiency of the energy transferred from the drive beam to the trailing witness beam passing through a wakefield accelerating structure (all metal or dielectric based) or a plasma chamber. Using a ramped bunch train (RBT) rather than a single drive bunch, the enhanced transformer ratio (ETR) technique is able to increase the transformer ratio R above the ordinary limit of 2 for a single bunch in a collinear wakefield accelerator. The RBT is a train of electron bunches separated by half integer multiples wavelength of the wakefield. The charge of the leading bunch is lowest and subsequent bunch charges are increased in such a way as to maximize R. In this article, an experimental study of this scheme is presented in which an RBT of 2 bunches with charge ratio of 1:2.5 and bunch length {sigma}{sub z} = 2 mm were used to enhance the transformer ratio. Measurement results and data analysis show good agreement with theoretical predictions. The ETR technique demonstrated here can be used in any collinear wakefield accelerator configuration, either structure- or plasma-based.

  7. Preconception maternal polychlorinated biphenyl concentrations and the secondary sex ratio

    SciTech Connect (OSTI)

    Taylor, Kira C. [Division of Epidemiology, Statistics and Prevention Research, National Institutes of Child Health and Development (NICHD), NIH, DHHS, 6100 Executive Blvd, Room 7B03, Rockville, MD 20852 (United States); Department of Epidemiology, 1518 Clifton Road, NE Atlanta, GA 30322 (United States); Jackson, Leila W. [Department of Epidemiology and Biostatistics, WG37, Case Western Reserve University School of Medicine, 10900 Euclid Avenue Cleveland, OH 44106-4945 (United States); Lynch, Courtney D. [Division of Epidemiology, Statistics and Prevention Research, National Institutes of Child Health and Development (NICHD), NIH, DHHS, 6100 Executive Blvd, Room 7B03, Rockville, MD 20852 (United States); Kostyniak, Paul J. [Toxicology Research Center, 134 Cary Hall, University at Buffalo, State of New York, 3434 Main St., Buffalo, NY 14214-3000 (United States); Buck Louis, Germaine M. [Division of Epidemiology, Statistics and Prevention Research, National Institutes of Child Health and Development (NICHD), NIH, DHHS, 6100 Executive Blvd, Room 7B03, Rockville, MD 20852 (United States)]. E-mail: louisg@mail.nih.gov

    2007-01-15

    The secondary sex ratio is the ratio of male to female live births and historically has ranged from 102 to 106 males to 100 females. Temporal declines have been reported in many countries prompting authors to hypothesize an environmental etiology. Blood specimens were obtained from 99 women aged 24-34 prior to attempting pregnancy and quantified for 76 polychlorinated biphenyl (PCB) congeners using dual column gas chromatography with electron capture detection. Women were prospectively followed until pregnancy or 12 cycles of trying. The odds of a male birth for three PCB groupings (total, estrogenic, anti-estrogenic) controlling for maternal characteristics were estimated using logistic regression. Among the 50 women with live births and PCB data, 26 female and 24 male infants were born (ratio 0.92). After adjusting for age and body mass index, odds of a male birth were elevated among women in the second (OR=1.29) and third (OR=1.48) tertiles of estrogenic PCBs; odds (OR=0.70) were reduced among women in the highest tertile of anti-estrogenic PCBs. All confidence intervals included one. The direction of the odds ratios in this preliminary study varied by PCB groupings, supporting the need to study specific PCB patterns when assessing environmental influences on the secondary sex ratio.

  8. The influence of product and service ratio on the stakeholder interaction in software system development

    E-Print Network [OSTI]

    Yip, Man Hang; Phaal, Rob; Probert, David

    2014-01-01

    4 Independent Linked Incorporated Ind ep en de nt Lin ke d Inc orp ora ted Pr oc es s C on ne cti vit y Dir ec tio n o f in cre as ing co mp lex ity Data Connectivity Direction of increasing complexity Case Number Legend: 12 The PSS...

  9. Recent Experiment on Wakefield Transformer Ratio Enhancement at AWA

    SciTech Connect (OSTI)

    Jing, C.; Kanareykin, A. [Euclid Techlabs, LLC, 5900 Harper Rd, Solon, OH 44139 (United States); High Energy Physics Division, Argonne National Laboratory, Argonne, IL 60439 (United States); Power, J. G.; Conde, M.; Liu, W.; Yusof, Z.; Gai, W. [High Energy Physics Division, Argonne National Laboratory, Argonne, IL 60439 (United States)

    2010-11-04

    One technique to enhance the transformer ratio beyond the ordinary limit of 2 in a collinear wakefield acceleration scheme is to use a ramped bunched train (RBT). The first experimental demonstration has been reported in [1]. However, due to the mismatch between the beam bunch length and frequency of the accelerating structure, the observed transformer ratio was only marginally above 2 in the earlier experiment. We recently revisited this experiment with an optimized bunch length using the laser stacking technique at Argonne Wakefield Accelerator (AWA) facility. A transformer ratio of 3.4 has been measured using two drive bunches. Attempting to use four drive bunches met with major challenges. In this article, measurement results and data analysis from these experiments are presented in detail.

  10. Transformer ratio improvement for beam based plasma accelerators

    SciTech Connect (OSTI)

    O'Shea, Brendan; Rosenzweig, James; Barber, Samuel; Fukasawa, Atsushi; Williams, Oliver; Muggli, Patric; Yakimenko, Vitaly; Kusche, Karl [University of California, Los Angeles, Department of Physics and Astronomy, Los Angeles, CA 90095 (United States); University of Southern California, Department of Electrical Engineering, Los Angeles, CA 90089 U.S.A. and Max-Planck-Institut fuer Physik, Foehringer Ring 6, 80805 Muenchen (Germany); Accelerator Test Facility, Brookhaven National Lab, Upton, NY, 11973 (United States)

    2012-12-21

    Increasing the transformer ratio of wakefield accelerating systems improves the viability of present novel accelerating schemes. The use of asymmetric bunches to improve the transformer ratio of beam based plasma systems has been proposed for some time[1, 2] but suffered from lack appropriate beam creation systems. Recently these impediments have been overcome [3, 4] and the ability now exists to create bunches with current profiles shaped to overcome the symmetric beam limit of R {<=} 2. We present here work towards experiments designed to measure the transformer ratio of such beams, including theoretical models and simulations using VORPAL (a 3D capable PIC code) [5]. Specifically we discuss projects to be carried out in the quasi-nonlinear regime [6] at the UCLA Neptune Laboratory and the Accelerator Test Facility at Brookhaven National Lab.

  11. Starting low compression ratio rotary Wankel diesel engine

    SciTech Connect (OSTI)

    Kamo, R.; Yamada, T.Y.; Hamada, Y.

    1987-01-01

    The single stage rotary Wankel engine is difficult to convert into a diesel version having an adequate compression ratio and a compatible combustion chamber configuration. Past efforts in designing a rotary-type Wankel diesel engine resorted to a two-stage design. Complexity, size, weight, cost and performance penalties were some of the drawbacks of the two-stage Wankel-type diesel designs. This paper presents an approach to a single stage low compression ratio Wankel-type rotary engine. Cold starting of a low compression ratio single stage diesel Wankel becomes the key problem. It was demonstrated that the low compression single stage diesel Wankel type rotary engine can satisfactorily be cold started with a properly designed combustion chamber in the rotor and a variable heat input combustion aid.

  12. Material development in the SI{sub 3}N{sub 4} system using glass encapsulated Hip`ing. Final report, Phase 2: DOE/ORNL Ceramic Technology Project

    SciTech Connect (OSTI)

    Corbin, N.D.; Sundberg, G.J.; Siebein, K.N.; Willkens, C.A.; Pujari, V.K.; Rossi, G.A.; Hansen, J.S.; Chang, C.L.; Hammarstrom, J.L.

    1992-04-01

    This report covers a two-year program to develop fully dense Si{sub 3}N{sub 4} matrix SiC whisker composites with enhanced properties over monolithic Si{sub 3}N{sub 4} materials. The primary goal was to develop a composite with a fracture toughness > 10 MPa{radical}m, capable of using high pressure glass encapsulated HIP`ing. Coating methods were developed to apply thin (<150nm) stoichiometric BN layers to SiC whiskers and also to apply a dual coating of SiC over carbon to the whiskers. Fracture toughness of the composites was determined to increase as the quantity of whiskers (or elongated grains) with their axis perpendicular to the crack plane increased. Of the interface compositions evaluated in this effort, carbon was determined to be the most effective for increasing toughness. The highest toughnesses (6.8--7.0 MPa{radical}m) were obtained with uniaxially aligned carbon coated whiskers. There was no evidence of the carbon coating compromising the oxidation resistance of the composites at 1370{degree}C.

  13. High transformer ratio drive beams for wakefield accelerator studies

    SciTech Connect (OSTI)

    England, R. J.; Ng, C.-K.; Frederico, J.; Hogan, M. J.; Litos, M.; Muggli, P.; Joshi, C.; An, W.; Andonian, G.; Mori, W.; Lu, W. [SLAC National Accelerator Laboratory, Menlo Park, CA 94025 (United States); Max Planck Institute for Physics, 80805 Munich (Germany); University of California Los Angeles, Los Angeles, CA 90095 (United States); Tsinghua University, Beijing (China)

    2012-12-21

    For wakefield based acceleration schemes, use of an asymmetric (or linearly ramped) drive bunch current profile has been predicted to enhance the transformer ratio and generate large accelerating wakes. We discuss plans and initial results for producing such bunches using the 20 to 23 GeV electron beam at the FACET facility at SLAC National Accelerator Laboratory and sending them through plasmas and dielectric tubes to generate transformer ratios greater than 2 (the limit for symmetric bunches). The scheme proposed utilizes the final FACET chicane compressor and transverse collimation to shape the longitudinal phase space of the beam.

  14. A new deep branch of eurasian mtDNA macrohaplogroup M reveals additional complexity regarding the settlement of Madagascar

    E-Print Network [OSTI]

    Ricaut, Francois-X.; Razafindrazaka, Harilanto; Cox, Murray P.; Dugoujon, Jean-M.; Guitard, Evelyne; Sambo, Clement; Mormina, Maru; Mirazon-Lahr, Marta; Ludes, Bertrand; Crubezy, Eric

    2009-12-14

    highlanders (n = 266). Complete mitochondrial DNA genome sequences reveal several unresolved lineages, and a new, deep branch of the out-of-Africa founder clade M has been identified. This new haplogroup, M23, has a limited global distribution...

  15. USDA Forest Service Gen. Tech. Rep. PSW-GTR-181. 2002. 593 Dead Branches and Other Wildlife

    E-Print Network [OSTI]

    Resources on California Black Oak (Quercus kelloggii)1 Barrett A. Garrison,2 Robin L. Wachs,3 Terry A. Giles: mtriggs@fs.fed.us) #12;Dead Branches in Living California Black Oak--Garrison, Wachs, Giles, and Triggs

  16. IEA Workshop 59 Shape and Aspect Ratio Optimization for

    E-Print Network [OSTI]

    IEA Workshop 59 Shape and Aspect Ratio Optimization for High Beta, Steady-State Tokamak SCOPE of your talk for posting on the IEA Large Tokamak Web Site Lunch today from 12:00 ­ 13:30 --- on your own ­ on the table Start time tomorrow -- 08:15 Please sign in #12;DRAFT AGENDA IEA Workshop 59 Shape and Aspect

  17. Processing of loglikelihood ratios Correcting systematic mismatches in computed

    E-Print Network [OSTI]

    ­likelihood ratios 1 AUGUSTUS J.E.M. JANSSEN, MARTEN VAN DIJK Philips Research Laboratories, Prof. Holstlaan 4, 5656 AA Eindhoven {A.J.E.M.Janssen,Marten.van.Dijk}@philips.com ARIE KOPPELAAR Philips Semiconductors. Submission 1 #12; A.J.E.M. Janssen, M. van Dijk, A.G.C. Koppelaar - 6 6 LLR computations - - I

  18. ATMOSPHERIC TURBIDITY DETERMINATION FROM IRRADIANCE RATIOS Chris Gueymard Frank Vignola

    E-Print Network [OSTI]

    Oregon, University of

    ATMOSPHERIC TURBIDITY DETERMINATION FROM IRRADIANCE RATIOS Chris Gueymard Frank Vignola Florida irradiance measurements and other atmo- spheric parameters. An error analysis and various tests against cloudless and the diffuse irradiance data are very accurate. Yet, this method is insensitive to errors

  19. Geographical Distribution of 3 He Ratios in the Chugoku District,

    E-Print Network [OSTI]

    Seno, Tetsuzo

    melting of the subducting Philippine Sea plate. The other source with pristine mantle material may component of melting of the Philippine Sea slab. Key words: Helium isotopes, magma source, subduction, Philippine Sea plate. 1. Introduction It is well documented that helium isotopic ratios can be useful

  20. NOTE / NOTE Sex ratio variation in gynodioecious species of

    E-Print Network [OSTI]

    Dorken, Marcel

    NOTE / NOTE Sex ratio variation in gynodioecious species of Echium endemic to the Canary Islands Marcel E. Dorken Abstract: Species of Echium from the Canary Islands represent an adaptive radiation fertility of females and hermaphrodites were de- tected. Key words: Canary Islands, Echium, island radiation

  1. Offspring sex ratios correlate with pairmale condition in a cooperatively

    E-Print Network [OSTI]

    Montgomerie, Bob

    Offspring sex ratios correlate with pair­male condition in a cooperatively breeding fairy We examined sex allocation patterns in island and mainland populations of cooperatively breeding, provided a unique situation in which we could investigate different predictions from sex allocation theory

  2. Averaged equilibrium and stability in low-aspect-ratio stellarators

    SciTech Connect (OSTI)

    Garcia, L.; Carreras, B.A.; Dominguez, N.

    1989-01-01

    The MHD equilibrium and stability calculations or stellarators are complex because of the intrinsic three-dimensional (3-D) character of these configurations. The stellarators expansion simplifies the equilibrium calculation by reducing it to a two-dimensional (2-D) problem. The classical stellarator expansion includes terms up to order epsilon/sup 2/, and the vacuum magnetic field is also included up to this order. For large-aspect-ratio configurations, the results of the stellarator expansion agree well with 3-D numerical equilibrium results. But for low-aspect-ratio configurations, these are significant discrepancies with 3-D equilibrium calculations. The main reason for these discrepancies is the approximation in the vacuum field contributions. This problem can be avoided by applying the average method in a vacuum flux coordinate system. In this way, the exact vacuum magnetic field contribution is included and the results agree well with 3-D equilibrium calculations even for low-aspect-ratio configurations. Using the average method in a vacuum flux coordinate system also permit the accurate calculation of local stability properties with the Mercier criterion. The main improvement is in the accurate calculation of the geodesic curvature term. In this paper, we discuss the application of the average method in flux coordinates to the calculation of the Mercier criterion for low-aspect-ratio stellarator configurations. 12 refs., 3 figs.

  3. Abundance Ratio Trends and Nucleosynthesis in Elliptical Galaxies and Spheroids

    E-Print Network [OSTI]

    Worthey, Guy

    Abundance Ratio Trends and Nucleosynthesis in Elliptical Galaxies and Spheroids Guy Worthey 1, nucleosynthesis, abundances --- galaxies: abundances --- galaxies: elliptical and lenticular, cD --- galaxies of the discussion to other elements in section 3. The fourth section discusses nucleosynthesis and possible hints

  4. Allowable pillar to diameter ratio for strategic petroleum reserve caverns.

    SciTech Connect (OSTI)

    Ehgartner, Brian L.; Park, Byoung Yoon

    2011-05-01

    This report compiles 3-D finite element analyses performed to evaluate the stability of Strategic Petroleum Reserve (SPR) caverns over multiple leach cycles. When oil is withdrawn from a cavern in salt using freshwater, the cavern enlarges. As a result, the pillar separating caverns in the SPR fields is reduced over time due to usage of the reserve. The enlarged cavern diameters and smaller pillars reduce underground stability. Advances in geomechanics modeling enable the allowable pillar to diameter ratio (P/D) to be defined. Prior to such modeling capabilities, the allowable P/D was established as 1.78 based on some very limited experience in other cavern fields. While appropriate for 1980, the ratio conservatively limits the allowable number of oil drawdowns and hence limits the overall utility and life of the SPR cavern field. Analyses from all four cavern fields are evaluated along with operating experience gained over the past 30 years to define a new P/D for the reserve. A new ratio of 1.0 is recommended. This ratio is applicable only to existing SPR caverns.

  5. Efficient Posterior Probability Mapping Using Savage-Dickey Ratios

    E-Print Network [OSTI]

    Penny, Will

    Efficient Posterior Probability Mapping Using Savage- Dickey Ratios William D. Penny*, Gerard R interactive manner. Citation: Penny WD, Ridgway GR (2013) Efficient Posterior Probability Mapping Using Savage, 2013 Copyright: Ã? 2013 Penny, Ridgway. This is an open-access article distributed under the terms

  6. The Proton Form Factor Ratio Measurements at Jefferson Lab

    SciTech Connect (OSTI)

    Punjabi, Vina A. [Norfolk State University, Norfolk, VA (United States); Perdrisat, Charles F. [William and Mary College, Williamsburg, VA (United States)

    2014-03-01

    The ratio of the proton form factors, G{sub Ep}/G{sub Mp}, has been measured from Q{sup 2} of 0.5 GeV{sup 2} to 8.5 GeV{sup 2}, at the Jefferson Laboratory, using the polarization transfer method. This ratio is extracted directly from the measured ratio of the transverse and longitudinal polarization components of the recoiling proton in elastic electron-proton scattering. The discovery that the proton form factor ratio measured in these experiments decreases approximately linearly with four-momentum transfer, Q{sup 2}, for values above #25;~1 GeV{sup 2}, is one of the most significant results to come out of JLab. These results have had a large impact on progress in hadronic physics; and have required a significant rethinking of nucleon structure. The increasingly common use of the double-polarization technique to measure the nucleon form factors, in the last 15 years, has resulted in a dramatic improvement of the quality of all four nucleon electromagnetic form factors, G{sub Ep}, G{sub Mp}, G{sub En} and G{sub Mn}. There is an approved experiment at JLab, GEP(V), to continue the ratio measurements to 12 GeV{sup 2}. A dedicated experimental setup, the Super Bigbite Spectrometer (SBS), will be built for this purpose. It will be equipped with a focal plane polarimeter to measure the polarization of the recoil protons. The scattered electrons will be detected in an electromagnetic calorimeter. In this presentation, I will review the status of the proton elastic electromagnetic form factors and discuss a number of theoretical approaches to describe nucleon form factors.

  7. OXYGEN ISOTOPIC RATIOS IN COOL R CORONAE BOREALIS STARS

    SciTech Connect (OSTI)

    Garcia-Hernandez, D. A. [Instituto de Astrofisica de Canarias (IAC), C/Via Lactea s/n, 38200 La Laguna, Tenerife (Spain); Lambert, David L. [W. J. McDonald Observatory, University of Texas at Austin. 1 University Station, C1400. Austin, TX 78712-0259 (United States); Rao, N. Kameswara [Indian Institute of Astrophysics, Bangalore 560 034 (India); Hinkle, Ken H. [National Optical Astronomy Observatory (NOAO), Tucson, AZ 85726 (United States); Eriksson, Kjell, E-mail: agarcia@iac.e, E-mail: dll@astro.as.utexas.ed, E-mail: nkrao@iiap.res.i, E-mail: hinkle@noao.ed, E-mail: Kjell.Eriksson@astro.uu.s [Department of Physics and Astronomy, Uppsala University, Box 515, 75120 Uppsala (Sweden)

    2010-05-01

    We investigate the relationship between R Coronae Borealis (RCB) stars and hydrogen-deficient carbon (HdC) stars by measuring precise {sup 16}O/{sup 18}O ratios for five cool RCB stars. The {sup 16}O/{sup 18}O ratios are derived by spectrum synthesis from high-resolution (R {approx} 50, 000) K-band spectra. Lower limits to the {sup 16}O/{sup 17}O and {sup 14}N/{sup 15}N ratios as well as Na and S abundances (when possible) are also given. RCB stars in our sample generally display less {sup 18}O than HdC stars-the derived {sup 16}O/{sup 18}O ratios range from 3 to 20. The only exception is the RCB star WX CrA, which seems to be an HdC-like star with {sup 16}O/{sup 18}O = 0.3. Our result of a higher {sup 16}O/{sup 18}O ratio for the RCB stars must be accounted for by a theory of the formation and evolution of HdC and RCB stars. We speculate that a late dredge-up of products of He burning, principally {sup 12}C and {sup 16}O, may convert an {sup 18}O-rich HdC star into an {sup 18}O-poor RCB star as the H-deficient star begins its final evolution from a cool supergiant to the top of the white dwarf cooling track.

  8. Evaluation of measurement accuracies of the Higgs boson branching fractions in the International Linear Collider

    E-Print Network [OSTI]

    H. Ono; A. Miyamoto

    2013-03-19

    Precise measurement of Higgs boson couplings is an important task for International Linear Collider (ILC) experiments and will facilitate the understanding of the particle mass generation mechanism. In this study, the measurement accuracies of the Higgs boson branching fractions to the $b$ and $c$ quarks and gluons, $\\Delta Br(H\\to b\\bar{b},\\sim c\\bar{c},\\sim gg)/Br$, were evaluated with the full International Large Detector model (\\texttt{ILD\\_00}) for the Higgs mass of 120 GeV at the center-of-mass (CM) energies of 250 and 350 GeV using neutrino, hadronic and leptonic channels and assuming an integrated luminosity of $250 {\\rm fb^{-1}}$, and an electron (positron) beam polarization of -80% (+30%). We obtained the following measurement accuracies of the Higgs cross section times branching fraction ($\\Delta (\\sigma \\cdot Br)/\\sigma \\cdot Br$) for decay of the Higgs into $b\\bar{b}$, $c\\bar{c}$, and $gg$; as 1.0%, 6.9%, and 8.5% at a CM energy of 250 GeV and 1.0%, 6.2%, and 7.3% at 350 GeV, respectively. After the measurement accuracy of the cross section ($\\Delta\\sigma/\\sigma$) was corrected using the results of studies at 250 GeV and their extrapolation to 350 GeV, the derived measurement accuracies of the branching fractions ($\\Delta Br/Br$) to $b\\bar{b}$, $c\\bar{c}$, and gg were 2.7%, 7.3%, and 8.9% at a CM energy of 250 GeV and 3.6%, 7.2%, and 8.1% at 350 GeV, respectively.

  9. Process for the conversion of lower alcohols to higher branched oxygenates

    DOE Patents [OSTI]

    Barger, Paul T. (Arlington Heights, IL)

    1996-01-01

    A process is provided for the production of branched C.sub.4+ oxygenates from lower alcohols such as methanol, ethanol, propanol and mixtures thereof. The process comprises contacting the lower alcohols with a solid catalyst comprising a mixed metal oxide support having components selected from the group consisting of oxides of zinc, magnesium, zirconia, titanium, manganese, chromium, and lanthanides, and an activation metal selected from the group consisting of Group VIII metal, Group IB metals, and mixtures thereof. The advantage of the process is improved yields and selectivity to isobutanol which can subsequently be employed in the production of high octane motor gasoline.

  10. Process for the conversion of lower alcohols to higher branched oxygenates

    DOE Patents [OSTI]

    Barger, P.T.

    1996-09-24

    A process is provided for the production of branched C{sub x} oxygenates from lower alcohols such as methanol, ethanol, propanol and mixtures thereof. The process comprises contacting the lower alcohols with a solid catalyst comprising a mixed metal oxide support having components selected from the group consisting of oxides of zinc, magnesium, zirconia, titanium, manganese, chromium, and lanthanides, and an activation metal selected from the group consisting of Group VIII metal, Group IB metals, and mixtures thereof. The advantage of the process is improved yields and selectivity to isobutanol which can subsequently be employed in the production of high octane motor gasoline.

  11. Simulation of the ultrasonic array response from real branched cracks using an efficient finite element method

    SciTech Connect (OSTI)

    Felice, Maria V. [Department of Mechanical Engineering, University of Bristol, Bristol BS8 1TR, United Kingdom and Rolls-Royce plc., Bristol BS34 7QE (United Kingdom); Velichko, Alexander; Wilcox, Paul D. [Department of Mechanical Engineering, University of Bristol, Bristol BS8 1TR (United Kingdom); Barden, Tim J.; Dunhill, Tony K. [Rolls-Royce plc., Bristol BS34 7QE (United Kingdom)

    2014-02-18

    A hybrid model to simulate the ultrasonic array response from stress corrosion cracks is presented. These cracks are branched and difficult to detect so the model is required to enable optimization of an array design. An efficient frequency-domain finite element method is described and selected to simulate the ultrasonic scattering. Experimental validation results are presented, followed by an example of the simulated ultrasonic array response from a real stress corrosion crack whose geometry is obtained from an X-ray Computed Tomography image. A simulation-assisted array design methodology, which includes the model and use of real crack geometries, is proposed.

  12. The Atmospheric Muon Charge Ratio at the MINOS Near Detector

    SciTech Connect (OSTI)

    de Jong, J.K.; /IIT, Chicago /Oxford U.

    2011-11-01

    The magnetized MINOS near detector can accurately determine the charge sign of atmospheric muons, this facilitates a measurement of the atmospheric muon charge ratio. To reduce the systematic error associated with geometric bias and acceptance we have combined equal periods of data obtained with opposite magnetic field polarities. We report a charge ratio of 1.2666 {+-} 0.0015(stat.){sub -0.0088}{sup +0.0096}(syst.) at a mean E{sub {mu},0{sup cos}}({theta}) = 63 GeV. This measurement is consistent with the world average but significantly lower than the earlier observation at the MINOS far detector. This increase is shown to be consistent with the hypothesis that a greater fraction of the observed muons arise from kaon decay within the cosmic ray shower.

  13. Shear viscosity to entropy density ratio in nuclear multifragmentation

    E-Print Network [OSTI]

    Subrata Pal

    2010-05-03

    Nuclear multifragmentation in intermediate energy heavy ion collisions has long been associated with liquid-gas phase transition. We calculate the shear viscosity to entropy density ratio eta/s for an equilibrated system of nucleons and fragments produced in multifragmentation within an extended statistical multifragmentation model. The temperature dependence of eta/s exhibits surprisingly similar behavior as that for water. In the coexistence phase of fragments and light particles, the ratio eta/s reaches a minimum of comparable depth as that for water in the vicinity of the critical temperature for liquid-gas phase transition. The effects of freeze-out volume and surface symmetry energy on eta/s in multifragmentation are studied.

  14. Method for fabricating high aspect ratio structures in perovskite material

    DOE Patents [OSTI]

    Karapetrov, Goran T.; Kwok, Wai-Kwong; Crabtree, George W.; Iavarone, Maria

    2003-10-28

    A method of fabricating high aspect ratio ceramic structures in which a selected portion of perovskite or perovskite-like crystalline material is exposed to a high energy ion beam for a time sufficient to cause the crystalline material contacted by the ion beam to have substantially parallel columnar defects. Then selected portions of the material having substantially parallel columnar defects are etched leaving material with and without substantially parallel columnar defects in a predetermined shape having high aspect ratios of not less than 2 to 1. Etching is accomplished by optical or PMMA lithography. There is also disclosed a structure of a ceramic which is superconducting at a temperature in the range of from about 10.degree. K. to about 90.degree. K. with substantially parallel columnar defects in which the smallest lateral dimension of the structure is less than about 5 microns, and the thickness of the structure is greater than 2 times the smallest lateral dimension of the structure.

  15. Radar antenna pointing for optimized signal to noise ratio.

    SciTech Connect (OSTI)

    Doerry, Armin Walter; Marquette, Brandeis

    2013-01-01

    The Signal-to-Noise Ratio (SNR) of a radar echo signal will vary across a range swath, due to spherical wavefront spreading, atmospheric attenuation, and antenna beam illumination. The antenna beam illumination will depend on antenna pointing. Calculations of geometry are complicated by the curved earth, and atmospheric refraction. This report investigates optimizing antenna pointing to maximize the minimum SNR across the range swath.

  16. Effect of Poisson ratio on cellular structure formation

    E-Print Network [OSTI]

    Ilka B. Bischofs; Ulrich S. Schwarz

    2005-04-05

    Mechanically active cells in soft media act as force dipoles. The resulting elastic interactions are long-ranged and favor the formation of strings. We show analytically that due to screening, the effective interaction between strings decays exponentially, with a decay length determined only by geometry. Both for disordered and ordered arrangements of cells, we predict novel phase transitions from paraelastic to ferroelastic and anti-ferroelastic phases as a function of Poisson ratio.

  17. The use of carbon stable isotope ratios in drugs characterization

    SciTech Connect (OSTI)

    Magdas, D. A., E-mail: gabriela.cristea@itim-cj.ro; Cristea, G., E-mail: gabriela.cristea@itim-cj.ro; Bot, A., E-mail: gabriela.cristea@itim-cj.ro; Mirel, V., E-mail: gabriela.cristea@itim-cj.ro [National Institute for Research and Development of Isotopic and Molecular Technologies, 65-103 Donath Str., 400293 Cluj-Napoca (Romania)

    2013-11-13

    Isotopic Ratio Mass Spectrometry (IRMS) is an effective toll to be used for drug product authentication. The isotopic composition could be used to assist in the differentiation between batches of drugs and assist in the identification of counterfeit materials on the market. Only two factors affect the isotopic ratios in pharmaceutical components: the isotopic composition of the raw materials and the synthetic processes performed upon them. Counterfeiting of pharmaceutical drugs threatens consumer confidence in drug products companies' economical well-being. In this preliminary study, the analyzed samples consist in two types of commercially available analgesics, which were purchases from Romanian pharmacies. Differences in ?{sup 13}C between batches from ?29.7 to ?31.6% were observed, demonstrating that this method can be used to differentiate among individual drug batches and subsequently identify counterfeits on the market. On the other hand, carbon isotopic ratios differences among producers were recorded, the variations being between ?31.3 to ?34.9% for the same type of analgesic, but from different manufactures.

  18. Assessment of approximate computational methods for conical intersections and branching plane vectors in organic molecules

    SciTech Connect (OSTI)

    Nikiforov, Alexander; Gamez, Jose A.; Thiel, Walter; Huix-Rotllant, Miquel; Filatov, Michael

    2014-09-28

    Quantum-chemical computational methods are benchmarked for their ability to describe conical intersections in a series of organic molecules and models of biological chromophores. Reference results for the geometries, relative energies, and branching planes of conical intersections are obtained using ab initio multireference configuration interaction with single and double excitations (MRCISD). They are compared with the results from more approximate methods, namely, the state-interaction state-averaged restricted ensemble-referenced Kohn-Sham method, spin-flip time-dependent density functional theory, and a semiempirical MRCISD approach using an orthogonalization-corrected model. It is demonstrated that these approximate methods reproduce the ab initio reference data very well, with root-mean-square deviations in the optimized geometries of the order of 0.1 Å or less and with reasonable agreement in the computed relative energies. A detailed analysis of the branching plane vectors shows that all currently applied methods yield similar nuclear displacements for escaping the strong non-adiabatic coupling region near the conical intersections. Our comparisons support the use of the tested quantum-chemical methods for modeling the photochemistry of large organic and biological systems.

  19. Branching laws for polynomial endomorphisms in CAR algebra for fermions, uniformly hyperfinite algebras and Cuntz algebras

    E-Print Network [OSTI]

    Mitsuo Abe; Katsunori Kawamura

    2006-06-20

    Previously, we have shown that the CAR algebra for fermions is embedded in the Cuntz algebra ${\\cal O}_{2}$ in such a way that the generators are expressed in terms of polynomials in the canonical generators of the latter, and it coincides with the U(1)-fixed point subalgebra ${\\cal A}\\equiv {\\cal O}_{2}^{U(1)}$ of ${\\cal O}_{2}$ for the canonical gauge action. Based on this embedding formula, some properties of ${\\cal A}$ are studied in detail by restricting those of ${\\cal O}_{2}$. Various endomorphisms of ${\\cal O}_{2}$, which are defined by polynomials in the canonical generators, are explicitly constructed, and transcribed into those of ${\\cal A}$. Especially, we investigate branching laws for a certain family of such endomorphisms with respect to four important representations, i.e., the Fock representation, the infinite wedge representation and their duals. These endomorphisms are completely classified by their branching laws. As an application, we show that the reinterpretation of the Fock vacuum as the Dirac vacuum is described in representation theory through a mixture of fermions.

  20. Connecting the evolution of thermally pulsing asymptotic giant branch stars to the chemistry in their circumstellar envelopes -- I. The case of hydrogen cyanide

    E-Print Network [OSTI]

    Marigo, Paola; Nanni, Ambra; Bressan, Alessandro; Girardi, Leo

    2015-01-01

    We investigate the formation of hydrogen cyanide (HCN) in the inner circumstellar envelopes of thermally pulsing asymptotic giant branch (TP-AGB) stars. A dynamic model for periodically shocked atmospheres, which includes an extended chemo-kinetic network, is for the first time coupled to detailed evolutionary tracks for the TP-AGB phase computed with the COLIBRI code. We carried out a calibration of the main shock parameters (the shock formation radius and the effective adiabatic index) using the circumstellar HCN abundances recently measured for a populous sample of pulsating TP-AGB stars. Our models recover the range of the observed HCN concentrations as a function of the mass-loss rates, and successfully reproduce the systematic increase of HCN moving along the M-S-C chemical sequence of TP-AGB stars, that traces the increase of the surface C/O ratio. The chemical calibration brings along two important implications: i) the first shock should emerge very close to the photosphere, and ii) shocks are expecte...

  1. Measurement of the ratio Gamma(K_L -> gamma gamma)/Gamma(K_L -> pi^0 pi^0 pi^0) with the KLOE detector

    E-Print Network [OSTI]

    Adinolfi, M; Ambrosino, F; Antonelli, A; Antonelli, M; Bacci, C; Bencivenni, G; Bertolucci, Sergio; Bini, C; Bloise, C; Bocci, V; Bossi, F; Branchini, P; Bulychjov, S A; Cabibbo, G; Caloi, R; Campana, P; Capon, G; Capussela, T; Carboni, G; Casarsa, M; Casavola, V; Cataldi, G; Ceradini, F; Cervelli, F; Cevenini, F; Chiefari, G; Ciambrone, P; Conetti, S; De Lucia, E; De Simone, P; De Zorzi, G; Dell'Agnello, S; Denig, A; Di Domenico, A; Di Donato, C; Di Falco, S; Di Micco, B; Doria, A; Dreucci, M; Erriquez, O; Farilla, A; Felici, G; Ferrari, A; Ferrer, M L; Finocchiaro, G; Forti, C; Franceschi, A; Franzini, P; Gatti, C; Gauzzi, P; Giannasi, A; Giovannella, S; Gorini, E; Graziani, E; Incagli, M; Kluge, W; Kulikov, V; Lacava, F; Lanfranchi, G; Lee-Franzini, Juliet; Leone, D; Lu, F; Martemyanov, M; Matsyuk, M; Mei, W; Merola, L; Messi, R; Miscetti, S; Moulson, M; Müller, S; Murtas, F; Napolitano, M; Nedosekin, A; Nguyen, F; Palomba, M; Pacciani, L; Palutan, M; Pasqualucci, E; Passalacqua, L; Passeri, A; Patera, V; Perfetto, F; Petrolo, E; Pirozzi, G; Pontecorvo, L; Primavera, M; Ruggieri, F; Santangelo, P; Santovetti, E; Saracino, G; Schamberger, R D; Sciascia, B; Sciubba, A; Scuri, F; Sfiligoi, I; Sibidanov, A L; Spadaro, T; Spiriti, E; Tabidze, M D; Tong, G L; Tortora, L; Valente, P; Valeriani, B; Venanzoni, G; Veneziano, Stefano; Ventura, A; Ventura, Sandro; Versaci, R

    2003-01-01

    We have measured the ratio R=Gamma(K_L -> gamma gamma)/ \\Gamma(K_L -> 3 pi^0) using the KLOE detector. From a sample of ~ 10^9 phi-mesons produced at DAFNE, the Frascati phi-factory, we select ~ 1.6 10^8 K_L-mesons tagged by observing K_S -> pi^+ pi^- following the reaction e^+ e^- -> phi -> K_L K_S. From this sample we select 27,375 K_L -> gamma gamma events and obtain R = (2.79 \\pm 0.02_{stat} \\pm 0.02_{syst}) \\times 10^{-3}. Using the world average value for BR(K_{L} -> 3 pi^0), we obtain BR(K_{L} -> gamma gamma) = (5.89 \\pm 0.07 \\pm 0.08) \\times 10^{-4} where the second error is due to the uncertainty on the 3 pi^0 branching fraction.

  2. Simulation of Orientation in Injection Molding of High Aspect Ratio Particle Thermoplastic Composites

    E-Print Network [OSTI]

    Wapperom, Peter

    Simulation of Orientation in Injection Molding of High Aspect Ratio Particle Thermoplastic ratio particle reinforced thermoplastics made by injection molding are an attractive technology

  3. Study of the production of $\\Lambda_b^0$ and $\\overline{B}^0$ hadrons in $pp$ collisions and first measurement of the $\\Lambda_b^0\\rightarrow J/\\psi pK^-$ branching fraction

    E-Print Network [OSTI]

    Aaij, R; Adinolfi, M; Affolder, A; Ajaltouni, Z; Akar, S; Albrecht, J; Alessio, F; Alexander, M; Ali, S; Alkhazov, G; Cartelle, P Alvarez; Alves, A A; Amato, S; Amerio, S; Amhis, Y; An, L; Anderlini, L; Anderson, J; Andreassi, G; Andreotti, M; Andrews, J E; Appleby, R B; Gutierrez, O Aquines; Archilli, F; d'Argent, P; Artamonov, A; Artuso, M; Aslanides, E; Auriemma, G; Baalouch, M; Bachmann, S; Back, J J; Badalov, A; Baesso, C; Baldini, W; Barlow, R J; Barschel, C; Barsuk, S; Barter, W; Batozskaya, V; Battista, V; Bay, A; Beaucourt, L; Beddow, J; Bedeschi, F; Bediaga, I; Bel, L J; Bellee, V; Belloli, N; Belyaev, I; Ben-Haim, E; Bencivenni, G; Benson, S; Benton, J; Berezhnoy, A; Bernet, R; Bertolin, A; Bettler, M -O; van Beuzekom, M; Bien, A; Bifani, S; Billoir, P; Bird, T; Birnkraut, A; Bizzeti, A; Blake, T; Blanc, F; Blouw, J; Blusk, S; Bocci, V; Bondar, A; Bondar, N; Bonivento, W; Borghi, S; Borsato, M; Bowcock, T J V; Bowen, E; Bozzi, C; Braun, S; Britsch, M; Britton, T; Brodzicka, J; Brook, N H; Buchanan, E; Bursche, A; Buytaert, J; Cadeddu, S; Calabrese, R; Calvi, M; Gomez, M Calvo; Campana, P; Perez, D Campora; Capriotti, L; Carbone, A; Carboni, G; Cardinale, R; Cardini, A; Carniti, P; Carson, L; Akiba, K Carvalho; Casse, G; Cassina, L; Garcia, L Castillo; Cattaneo, M; Cauet, Ch; Cavallero, G; Cenci, R; Charles, M; Charpentier, Ph; Chefdeville, M; Chen, S; Cheung, S -F; Chiapolini, N; Chrzaszcz, M; Vidal, X Cid; Ciezarek, G; Clarke, P E L; Clemencic, M; Cliff, H V; Closier, J; Coco, V; Cogan, J; Cogneras, E; Cogoni, V; Cojocariu, L; Collazuol, G; Collins, P; Comerma-Montells, A; Contu, A; Cook, A; Coombes, M; Coquereau, S; Corti, G; Corvo, M; Couturier, B; Cowan, G A; Craik, D C; Crocombe, A; Torres, M Cruz; Cunliffe, S; Currie, R; D'Ambrosio, C; Dall'Occo, E; Dalseno, J; David, P N Y; Davis, A; De Bruyn, K; De Capua, S; De Cian, M; De Miranda, J M; De Paula, L; De Simone, P; Dean, C -T; Decamp, D; Deckenhoff, M; Del Buono, L; Déléage, N; Demmer, M; Derkach, D; Deschamps, O; Dettori, F; Dey, B; Di Canto, A; Di Ruscio, F; Dijkstra, H; Donleavy, S; Dordei, F; Dorigo, M; Suárez, A Dosil; Dossett, D; Dovbnya, A; Dreimanis, K; Dufour, L; Dujany, G; Dupertuis, F; Durante, P; Dzhelyadin, R; Dziurda, A; Dzyuba, A; Easo, S; Egede, U; Egorychev, V; Eidelman, S; Eisenhardt, S; Eitschberger, U; Ekelhof, R; Eklund, L; Rifai, I El; Elsasser, Ch; Ely, S; Esen, S; Evans, H M; Evans, T; Falabella, A; Färber, C; Farley, N; Farry, S; Fay, R; Ferguson, D; Albor, V Fernandez; Ferrari, F; Rodrigues, F Ferreira; Ferro-Luzzi, M; Filippov, S; Fiore, M; Fiorini, M; Firlej, M; Fitzpatrick, C; Fiutowski, T; Fohl, K; Fol, P; Fontana, M; Fontanelli, F; Forty, R; Francisco, O; Frank, M; Frei, C; Frosini, M; Fu, J; Furfaro, E; Torreira, A Gallas; Galli, D; Gallorini, S; Gambetta, S; Gandelman, M; Gandini, P; Gao, Y; Pardiñas, J García; Tico, J Garra; Garrido, L; Gascon, D; Gaspar, C; Gauld, R; Gavardi, L; Gazzoni, G; Gerick, D; Gersabeck, E; Gersabeck, M; Gershon, T; Ghez, Ph; Gianì, S; Gibson, V; Girard, O G; Giubega, L; Gligorov, V V; Göbel, C; Golubkov, D; Golutvin, A; Gomes, A; Gotti, C; Gándara, M Grabalosa; Diaz, R Graciani; Cardoso, L A Granado; Graugés, E; Graverini, E; Graziani, G; Grecu, A; Greening, E; Gregson, S; Griffith, P; Grillo, L; Grünberg, O; Gui, B; Gushchin, E; Guz, Yu; Gys, T; Hadavizadeh, T; Hadjivasiliou, C; Haefeli, G; Haen, C; Haines, S C; Hall, S; Hamilton, B; Han, X; Hansmann-Menzemer, S; Harnew, N; Harnew, S T; Harrison, J; He, J; Head, T; Heijne, V; Hennessy, K; Henrard, P; Henry, L; van Herwijnen, E; Heß, M; Hicheur, A; Hill, D; Hoballah, M; Hombach, C; Hulsbergen, W; Humair, T; Hussain, N; Hutchcroft, D; Hynds, D; Idzik, M; Ilten, P; Jacobsson, R; Jaeger, A; Jalocha, J; Jans, E; Jawahery, A; Jing, F; John, M; Johnson, D; Jones, C R; Joram, C; Jost, B; Jurik, N; Kandybei, S; Kanso, W; Karacson, M; Karbach, T M; Karodia, S; Kecke, M; Kelsey, M; Kenyon, I R; Kenzie, M; Ketel, T; Khanji, B; Khurewathanakul, C; Klaver, S; Klimaszewski, K; Kochebina, O; Kolpin, M; Komarov, I; Koopman, R F; Koppenburg, P; Kozeiha, M; Kravchuk, L; Kreplin, K; Kreps, M; Krocker, G; Krokovny, P; Kruse, F; Krzemien, W; Kucewicz, W; Kucharczyk, M; Kudryavtsev, V; Kuonen, A K; Kurek, K; Kvaratskheliya, T; Lacarrere, D; Lafferty, G; Lai, A; Lambert, D; Lanfranchi, G; Langenbruch, C; Langhans, B; Latham, T; Lazzeroni, C; Gac, R Le; van Leerdam, J; Lees, J -P; Lefèvre, R; Leflat, A; Lefrançois, J; Cid, E Lemos; Leroy, O; Lesiak, T; Leverington, B; Li, Y; Likhomanenko, T; Liles, M; Lindner, R; Linn, C; Lionetto, F; Liu, B; Liu, X; Loh, D; Longstaff, I; Lopes, J H; Lucchesi, D; Martinez, M Lucio; Luo, H; Lupato, A; Luppi, E; Lupton, O; Lusiani, A; Machefert, F; Maciuc, F; Maev, O; Maguire, K; Malde, S; Malinin, A; Manca, G; Mancinelli, G; Manning, P; Mapelli, A; Maratas, J; Marchand, J F; Marconi, U

    2015-01-01

    The product of the $\\Lambda_b^0$ ($\\overline{B}^0$) differential production cross-section and the branching fraction of the decay $\\Lambda_b^0\\rightarrow J/\\psi pK^-$ ($\\overline{B}^0\\rightarrow J/\\psi\\overline{K}^*(892)^0$) is measured as a function of the beauty hadron transverse momentum, $p_{\\rm T}$, and rapidity, $y$. The kinematic region of the measurements is $p_{\\rm T}measurements use a data sample corresponding to an integrated luminosity of $3~{\\rm fb}^{-1}$ collected by the LHCb detector in $pp$ collisions at centre-of-mass energies $\\sqrt{s}=7~{\\rm TeV}$ in 2011 and $\\sqrt{s}=8~{\\rm TeV}$ in 2012. Based on previous LHCb results of the fragmentation fraction ratio, $f_{\\Lambda_B^0}/f_d$, the branching fraction of the decay $\\Lambda_b^0\\rightarrow J/\\psi pK^-$ is measured to be \\begin{equation*} \\mathcal{B}(\\Lambda_b^0\\rightarrow J/\\psi pK^-)= (3.04\\pm0.04\\pm0.06\\pm0.33^{+0.43}_{-0.27})\\times10^{-4}, \\end{equation*} where the first uncertainty is statis...

  4. Study of the production of $\\Lambda_b^0$ and $\\overline{B}^0$ hadrons in $pp$ collisions and first measurement of the $\\Lambda_b^0\\rightarrow J/\\psi pK^-$ branching fraction

    E-Print Network [OSTI]

    LHCb Collaboration

    2015-01-01

    The product of the $\\Lambda_b^0$ ($\\overline{B}^0$) differential production cross-section and the branching fraction of the decay $\\Lambda_b^0\\rightarrow J/\\psi pK^-$ ($\\overline{B}^0\\rightarrow J/\\psi\\overline{K}^*(892)^0$) is measured as a function of the beauty hadron transverse momentum, $p_{\\rm T}$, and rapidity, $y$. The kinematic region of the measurements is $p_{\\rm T}measurements use a data sample corresponding to an integrated luminosity of $3~{\\rm fb}^{-1}$ collected by the LHCb detector in $pp$ collisions at centre-of-mass energies $\\sqrt{s}=7~{\\rm TeV}$ in 2011 and $\\sqrt{s}=8~{\\rm TeV}$ in 2012. Based on previous LHCb results of the fragmentation fraction ratio, $f_{\\Lambda_B^0}/f_d$, the branching fraction of the decay $\\Lambda_b^0\\rightarrow J/\\psi pK^-$ is measured to be \\begin{equation*} \\mathcal{B}(\\Lambda_b^0\\rightarrow J/\\psi pK^-)= (3.04\\pm0.04\\pm0.06\\pm0.33^{+0.43}_{-0.27})\\times10^{-4}, \\end{equation*} where the first uncertainty is st...

  5. Big Bang Nucleosynthesis and the Helium Isotope Ratio

    E-Print Network [OSTI]

    Ryan Cooke

    2015-10-09

    The conventional approach to search for departures from the standard model of physics during Big Bang Nucleosynthesis involves a careful, and subtle measurement of the mass fraction of baryons consisting of helium. Recent measurements of this quantity tentatively support new physics beyond the standard model but, historically, this method has suffered from hidden systematic uncertainties. In this letter, I show that a combined measurement of the primordial deuterium abundance and the primordial helium isotope ratio has the potential to provide a complementary and reliable probe of new physics beyond the standard model. Using the recent determination of the primordial deuterium abundance and assuming that the measured pre-solar 3He/4He meteoritic abundance reflects the primordial value, a bound can be placed on the effective number of neutrino species, Neff(BBN) = 3.01 (+0.95 -0.76, with 95 per cent confidence). Although this value of Neff supports the standard model, it is presently unclear if the pre-solar 3He/4He ratio reflects the primordial value. New astrophysical measurements of the helium isotope ratio in near-pristine environments, together with updated calculations and experimental values of several important nuclear reactions (some of which are already being attempted), will lead to much improved limits on possible departures from the standard model. To this end, I describe an analysis strategy to measure the 3He I flux emitted from nearby low metallicity H II regions. The proposed technique can be attempted with the next generation of large telescopes, and will be easier to realize in metal-poor H II regions with quiescent kinematics.

  6. CISC controls and the union/non-union wage ratio

    E-Print Network [OSTI]

    Shulenburger, David E.; McLean, Robert; Rasch, Sara B.

    1984-06-01

    . The estimating equation specified, then, is of the following form: (1) lnWij= c o ClUij + c2U2ij + c 3 (%AU)ij + c4V j + c5R j + c6Mij + c7Bij + c8C +. . . + cnC + eij; where lnW - - natural og of union + non-union craft wages U - - percent unionized V... in 1972 and 1973 (after substituting the 1972 and 1973 values of the independent variables). Thus, we can simulate the effect of controls on the wage ratio. Table 2 reports the results of that simulation. As shown by the first row of the table...

  7. Method for producing thin graphite flakes with large aspect ratios

    DOE Patents [OSTI]

    Bunnell, L. Roy (Kennewick, WA)

    1993-01-01

    A method for making graphite flakes of high aspect ratio by the steps of providing a strong concentrated acid and heating the graphite in the presence of the acid for a time and at a temperature effective to intercalate the acid in the graphite; heating the intercalated graphite at a rate and to a temperature effective to exfoliate the graphite in discrete layers; subjecting the graphite layers to ultrasonic energy, mechanical shear forces, or freezing in an amount effective to separate the layes into discrete flakes.

  8. Anomalous dynamic behaviour of optically trapped high aspect ratio nanowires

    E-Print Network [OSTI]

    Toe, Wen Jun; Angstmann, Christopher; Gao, Qiang; Tan, Hark Hoe; Jagadish, Chennupati; Henry, Bruce; Reece, Peter J

    2015-01-01

    We investigate the dynamics of high aspect ratio nanowires trapped axially in a single gradient force optical tweezers. A power spectrum analysis of the Brownian dynamics reveals a broad spectral resonance of the order of a kHz with peak properties that are strongly dependent on the input trapping power. Modelling of the dynamical equations of motion of the trapped nanowire that incorporate non-conservative effects through asymmetric coupling between translational and rotational degrees of freedom provides excellent agreement with the experimental observations. An associated observation of persistent cyclical motion around the equilibrium trapping position using winding analysis provides further evidence for the influence of non-conservative forces.

  9. Table 6.2 Consumption Ratios of Fuel, 2002

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: AlternativeMonthly","10/2015"Monthly","10/2015" ,"Release7CubicthroughtheSeptember 24,4,630.22 Consumption Ratios of Fuel,

  10. lIfesuppOrtIng resOurces are runnIng

    E-Print Network [OSTI]

    Svenningsson, Josef

    , masters in Sustainable Energy Systems Application for public transport: How can gamification be used they learn to explore, define, and act upon global challenges that face us in the 21st century ­ to transform and trans-disciplinary arena where students can contribute in solving their chosen sustainability challenge

  11. IS DUST FORMING ON THE RED GIANT BRANCH IN 47 Tuc?

    SciTech Connect (OSTI)

    Boyer, Martha L.; Gordon, Karl D.; Meixner, Margaret; Sewilo, Marta; Shiao, Bernie [STScI, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Van Loon, Jacco Th. [Astrophysics Group, Lennard-Jones Laboratories, Keele University, Staffordshire ST5 5BG (United Kingdom); McDonald, Iain [Jodrell Bank Centre for Astrophysics, Alan Turing Building, University of Manchester, M13 9PL (United Kingdom); Babler, Brian; Bracker, Steve; Meade, Marilyn [Department of Astronomy, University of Wisconsin, Madison, 475 North Charter Street, Madison, WI 53706-1582 (United States); Block, Miwa; Engelbracht, Charles; Misselt, Karl [Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States); Hora, Joe [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS 65, Cambridge, MA 02138-1516 (United States); Indebetouw, Remy [Department of Astronomy, University of Virginia, P.O. Box 3818, Charlottesville, VA 22903-0818 (United States); Whitney, Barbara [Space Science Institute, 4750 Walnut Street, Suite 205, Boulder, CO 80301 (United States)], E-mail: mboyer@stsci.edu

    2010-03-10

    Using Spitzer Infrared Array Camera (IRAC) observations from the SAGE-SMC Legacy program and archived Spitzer IRAC data, we investigate dust production in 47 Tuc, a nearby massive Galactic globular cluster. A previous study detected infrared excess, indicative of circumstellar dust, in a large population of stars in 47 Tuc, spanning the entire red giant branch (RGB). We show that those results suffered from effects caused by stellar blending and imaging artifacts and that it is likely that no stars below {approx}1 mag from the tip of the RGB are producing dust. The only stars that appear to harbor dust are variable stars, which are also the coolest and most luminous stars in the cluster.

  12. Ultrafast energy transfer from rigid, branched side-chains into a conjugated, alternating copolymer

    SciTech Connect (OSTI)

    Griffin, Graham B.; Rolczynski, Brian S.; Linkin, Alexander; McGillicuddy, Ryan D.; Engel, Gregory S., E-mail: gsengel@uchicago.edu [Department of Chemistry, The James Franck Institute, Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637 (United States); Lundin, Pamela M. [Department of Chemical Engineering, Stanford University, Stauffer III, 381 North-South Mall, Stanford, California 94305 (United States) [Department of Chemical Engineering, Stanford University, Stauffer III, 381 North-South Mall, Stanford, California 94305 (United States); A. R. Smith Department of Chemistry, Appalachian State University, 417 CAP Building, 525 Rivers Street, Boone, North Carolina 28608 (United States); Bao, Zhenan [Department of Chemical Engineering, Stanford University, Stauffer III, 381 North-South Mall, Stanford, California 94305 (United States)] [Department of Chemical Engineering, Stanford University, Stauffer III, 381 North-South Mall, Stanford, California 94305 (United States)

    2014-01-21

    We present the synthesis and characterization of a benzodithiophene/thiophene alternating copolymer decorated with rigid, singly branched pendant side chains. We characterize exciton migration and recombination dynamics in these molecules in tetrahydrofuran solution, using a combination of static and time-resolved spectroscopies. As control experiments, we also measure electronic relaxation dynamics in isolated molecular analogues of both the side chain and polymer moieties. We employ semi-empirical and time-dependent density functional theory calculations to show that photoexcitation of the decorated copolymer using 395 nm laser pulses results in excited states primarily localized on the pendant side chains. We use ultrafast transient absorption spectroscopy to show that excitations are transferred to the polymer backbone faster than the instrumental response function, ?250 fs.

  13. Wide Binary Effects on Asymmetries in Asymptotic Giant Branch Circumstellar Envelopes

    E-Print Network [OSTI]

    Kim, Hyosun

    2012-01-01

    Observations of increasingly higher spatial resolution reveal the existence of asymmetries in the circumstellar envelopes of a small fraction of asymptotic giant branch (AGB) stars. Although there is no general consensus for their origin, a binary companion star may be responsible. Within this framework, we investigate the gravitational effects associated with a sufficiently wide binary system, where Roche lobe overflow is unimportant, on the outflowing envelopes of AGB stars using three dimensional hydrodynamic simulations. The effects due to individual binary components are separately studied, enabling investigation of the stellar and circumstellar characteristics in detail. The reflex motion of the AGB star alters the wind velocity distribution, thereby, determining the overall shape of the outflowing envelope. On the other hand, the interaction of the companion with the envelope produces a gravitational wake, which exhibits a vertically thinner shape. The two patterns overlap and form clumpy structures. T...

  14. Measurement of the Absolute Branching Fraction of D0 to K- pi+

    SciTech Connect (OSTI)

    Aubert, B.; Bona, M.; Boutigny, D.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Prudent, X.; Tisserand, V.; Zghiche, A.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Lopez, L.; Palano, A.; /Bari U.; Eigen, G.; Ofte, I.; Stugu, B.; Sun, L.; /Bergen U.; Abrams, G.S.; Battaglia, M.; Brown, D.N.; Button-Shafer, J.; /LBL, Berkeley

    2007-04-25

    The authors measure the absolute branching fraction for D{sup 0} {yields} K{sup -} {pi}{sup +} using partial reconstruction of {bar B}{sup 0} {yields} D*{sup +}X{ell}{sup -}{bar {nu}}{sub {ell}} decays, in which only the charged lepton and the pion from the decay D*{sup +} {yields} D{sup 0}{pi}{sup +} are used. Based on a data sample of 230 million B{bar B} pairs collected at the {Upsilon}(4S) resonance with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, they obtain {Beta}(D{sup 0} {yields} K{sup -}{pi}{sup +}) = (4.007 {+-} 0.037 {+-} 0.070)%, where the first error is statistical and the second error is systematic.

  15. Multivariate Analysis of Globular Cluster's Horizontal Branch Morphology: searching for the second parameter

    E-Print Network [OSTI]

    A. Recio-Blanco; A. Aparicio; G. Piotto; F. De Angeli; S. G. Djorgovski

    2005-11-24

    The interpretation of globular cluster horizontal branch (HB) morphology is a classical problem that can significantly blur our understanding of stellar populations. In this paper, we present a new multivariate analysis connecting the effective temperature extent of the HB with other cluster parameters. The work is based on Hubble Space Telescope photometry of 54 Galactic globular clusters. The present study reveals an important role of the total mass of the globular cluster on its HB morphology. More massive clusters tend to have HBs more extended to higher temperatures. For a set of three input variables including the temperature extension of the HB, [Fe/H] and M_V, the first two eigenvectors account for the 90% of the total sample variance. Possible effects of cluster self-pollution on HB morphology, eventually stronger in more massive clusters, could explain the results here derived.

  16. Walker Branch Throughfall Displacement Experiment Data Report: Site Characterization, System Performance, Weather, Species Composition, and Growth

    SciTech Connect (OSTI)

    Hanson, P.J.

    2001-09-04

    This numeric data package provides data sets, and accompanying documentation, on site characterization, system performance, weather, species composition, and growth for the Throughfall Displacement Experiment, which was established in the Walker Branch Watershed of East Tennessee to provide data on the responses of forests to altered precipitation regimes. The specific data sets include soil water content and potential, coarse fraction of the soil profile, litter layer temperature, soil temperature, monthly weather, daily weather, hourly weather, species composition of trees and saplings, mature tree and sapling annual growth, and relative leaf area index. Fortran and SAS{trademark} access codes are provided to read the ASCII data files. The data files and this documentation are available without charge on a variety of media and via the Internet from the Carbon Dioxide Information Analysis Center (CDIAC).

  17. Influence of Transport Variables on Isospin Transport Ratios

    E-Print Network [OSTI]

    D. D. S. Coupland; W. G. Lynch; M. B. Tsang; P. Danielewicz; Yingxun Zhang

    2011-07-19

    The symmetry energy in the nuclear equation of state affects many aspects of nuclear astrophysics, nuclear structure, and nuclear reactions. Recent constraints from heavy ion collisions, including isospin diffusion observables, have started to put constraints on the symmetry energy below nuclear saturation density, but these constraints depend on the employed transport model and input physics other than the symmetry energy. To understand these dependencies, we study the influence of the symmetry energy, isoscaler mean field compressibility and momentum dependence, in-medium nucleon-nucleon cross sections, and light cluster production on isospin diffusion within the pBUU transport code. In addition to the symmetry energy, several uncertain issues strongly affect isospin diffusion, most notably the cross sections and cluster production. In addition, there is a difference in the calculated isospin transport ratios, depending upon whether they are computed using the isospin asymmetry of either the residue or of all forward moving fragments. Measurements that compare the isospin transport ratios of these two quantities would help place constraints on the input physics, such as the density dependence of the symmetry energy.

  18. The four-loop six-gluon NMHV ratio function

    E-Print Network [OSTI]

    Dixon, Lance J; McLeod, Andrew J

    2015-01-01

    We use the hexagon function bootstrap to compute the ratio function which characterizes the next-to-maximally-helicity-violating (NMHV) six-point amplitude in planar $\\mathcal{N} = 4$ super-Yang-Mills theory at four loops. A powerful constraint comes from dual superconformal invariance, in the form of a $\\bar{Q}$ differential equation, which heavily constrains the first derivatives of the transcendental functions entering the ratio function. At four loops, it leaves only a 34-parameter space of functions. Constraints from the collinear limits, and from the multi-Regge limit at the leading-logarithmic (LL) and next-to-leading-logarithmic (NLL) order, suffice to fix these parameters and obtain a unique result. We test the result against multi-Regge predictions at NNLL and N$^3$LL, and against predictions from the operator product expansion involving one and two flux-tube excitations; all cross-checks are satisfied. We study the analytical and numerical behavior of the parity-even and parity-odd parts on various...

  19. Measurement of branching fractions and rate asymmetries in the rare decays B?K(*)l?l?

    SciTech Connect (OSTI)

    Lees, J. P.; Poireau, V.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G.; Koch, H.; Schroeder, T.; Asgeirsson, D. J.; Hearty, C.; Mattison, T. S.; McKenna, J. A.; Khan, A.; Blinov, V. E.; Buzykaev, A. R.; Druzhinin, V. P.; Golubev, V. B.; Kravchenko, E. A.; Onuchin, A. P.; Serednyakov, S. I.; Skovpen, Yu. I.; Solodov, E. P.; Todyshev, K. Yu.; Yushkov, A. N.; Bondioli, M.; Kirkby, D.; Lankford, A. J.; Mandelkern, M.; Atmacan, H.; Gary, J. W.; Liu, F.; Long, O.; Vitug, G. M.; Campagnari, C.; Hong, T. M.; Kovalskyi, D.; Richman, J. D.; West, C. A.; Eisner, A. M.; Kroseberg, J.; Lockman, W. S.; Martinez, A. J.; Schumm, B. A.; Seiden, A.; Chao, D. S.; Cheng, C. H.; Echenard, B.; Flood, K. T.; Hitlin, D. G.; Ongmongkolkul, P.; Porter, F. C.; Rakitin, A. Y.; Andreassen, R.; Huard, Z.; Meadows, B. T.; Sokoloff, M. D.; Sun, L.; Bloom, P. C.; Ford, W. T.; Gaz, A.; Nauenberg, U.; Smith, J. G.; Wagner, S. R.; Ayad, R.; Toki, W. H.; Spaan, B.; Schubert, K. R.; Schwierz, R.; Bernard, D.; Verderi, M.; Clark, P. J.; Playfer, S.; Bettoni, D.; Bozzi, C.; Calabrese, R.; Cibinetto, G.; Fioravanti, E.; Garzia, I.; Luppi, E.; Munerato, M.; Negrini, M.; Piemontese, L.; Santoro, V.; Baldini-Ferroli, R.; Calcaterra, A.; de Sangro, R.; Finocchiaro, G.; Patteri, P.; Peruzzi, I. M.; Piccolo, M.; Rama, M.; Zallo, A.; Contri, R.; Guido, E.; Lo Vetere, M.; Monge, M. R.; Passaggio, S.; Patrignani, C.; Robutti, E.; Bhuyan, B.; Prasad, V.; Lee, C. L.; Morii, M.; Edwards, A. J.; Adametz, A.; Uwer, U.; Lacker, H. M.; Lueck, T.; Dauncey, P. D.; Behera, P. K.; Mallik, U.; Chen, C.; Cochran, J.; Meyer, W. T.; Prell, S.; Rubin, A. E.; Gritsan, A. V.; Guo, Z. J.; Arnaud, N.; Davier, M.; Derkach, D.; Grosdidier, G.; Le Diberder, F.; Lutz, A. M.; Malaescu, B.; Roudeau, P.; Schune, M. H.; Stocchi, A.; Wormser, G.; Lange, D. J.; Wright, D. M.; Chavez, C. A.; Coleman, J. P.; Fry, J. R.; Gabathuler, E.; Hutchcroft, D. E.; Payne, D. J.; Touramanis, C.; Bevan, A. J.; Di Lodovico, F.; Sacco, R.; Sigamani, M.; Cowan, G.; Brown, D. N.; Davis, C. L.; Denig, A. G.; Fritsch, M.; Gradl, W.; Griessinger, K.; Hafner, A.; Prencipe, E.; Barlow, R. J.; Jackson, G.; Lafferty, G. D.; Behn, E.; Cenci, R.; Hamilton, B.; Jawahery, A.; Roberts, D. A.; Dallapiccola, C.; Cowan, R.; Dujmic, D.; Sciolla, G.; Cheaib, R.; Lindemann, D.; Patel, P. M.; Robertson, S. H.; Biassoni, P.; Neri, N.; Palombo, F.; Stracka, S.; Cremaldi, L.; Godang, R.; Kroeger, R.; Sonnek, P.; Summers, D. J.; Nguyen, X.; Simard, M.; Taras, P.; De Nardo, G.; Monorchio, D.; Onorato, G.; Sciacca, C.; Martinelli, M.; Raven, G.; Jessop, C. P.; LoSecco, J. M.; Wang, W. F.; Honscheid, K.; Kass, R.; Brau, J.; Frey, R.; Sinev, N. B.; Strom, D.; Torrence, E.; Feltresi, E.; Gagliardi, N.; Margoni, M.; Morandin, M.; Posocco, M.; Rotondo, M.; Simi, G.; Simonetto, F.; Stroili, R.; Akar, S.; Ben-Haim, E.; Bomben, M.; Bonneaud, G. R.; Briand, H.; Calderini, G.; Chauveau, J.; Hamon, O.; Leruste, Ph.; Marchiori, G.; Ocariz, J.; Sitt, S.; Biasini, M.; Manoni, E.; Pacetti, S.; Rossi, A.; Angelini, C.; Batignani, G.; Bettarini, S.; Carpinelli, M.; Casarosa, G.; Cervelli, A.; Forti, F.; Giorgi, M. A.; Lusiani, A.; Oberhof, B.; Paoloni, E.; Perez, A.; Rizzo, G.; Walsh, J. J.; Lopes Pegna, D.; Olsen, J.; Smith, A. J. S.; Telnov, A. V.; Anulli, F.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Gaspero, M.; Li Gioi, L.; Mazzoni, M. A.; Piredda, G.; Bünger, C.; Grünberg, O.; Hartmann, T.; Leddig, T.; Schröder, H.; Voss, C.; Waldi, R.; Adye, T.; Olaiya, E. O.; Wilson, F. F.; Emery, S.; Hamel de Monchenault, G.; Vasseur, G.; Yèche, Ch.; Aston, D.; Bard, D. J.; Bartoldus, R.; Benitez, J. F.; Cartaro, C.; Convery, M. R.; Dorfan, J.; Dubois-Felsmann, G. P.; Dunwoodie, W.; Ebert, M.; Field, R. C.; Franco Sevilla, M.; Fulsom, B. G.; Gabareen, A. M.; Graham, M. T.; Grenier, P.; Hast, C.; Innes, W. R.; Kelsey, M. H.; Kim, P.; Kocian, M. L.; Leith, D. W. G. S.; Lewis, P.; Lindquist, B.; Luitz, S.; Luth, V.; Lynch, H. L.; MacFarlane, D. B.; Muller, D. R.; Neal, H.; Nelson, S.; Perl, M.; Pulliam, T.; Ratcliff, B. N.; Roodman, A.; Salnikov, A. A.; Schindler, R. H.; Snyder, A.; Su, D.; Sullivan, M. K.; Va’vra, J.; Wagner, A. P.; Wisniewski, W. J.; Wittgen, M.; Wright, D. H.; Wulsin, H. W.; Young, C. C.; Ziegler, V.; Park, W.; Purohit, M. V.; White, R. M.; Wilson, J. R.; Randle-Conde, A.; Sekula, S. J.; Bellis, M.; Burchat, P. R.; Miyashita, T. S.; Alam, M. S.; Ernst, J. A.; Gorodeisky, R.; Guttman, N.; Peimer, D. R.; Soffer, A.; Lund, P.; Spanier, S. M.; Ritchie, J. L.; Ruland, A. M.; Schwitters, R. F.; Wray, B. C.; Izen, J. M.; Lou, X. C.; Bianchi, F.; Gamba, D.; Lanceri, L.; Vitale, L.; Martinez-Vidal, F.; Oyanguren, A.; Ahmed, H.; Albert, J.

    2012-08-24

    In a sample of 471×10? BB¯¯¯ events collected with the BABAR detector at the PEP-II e?e? collider we study the rare decays B?K(*)l?l?, where l?l? is either e?e? or ????. We report results on partial branching fractions and isospin asymmetries in seven bins of dilepton mass-squared. We further present CP and lepton-flavor asymmetries for dilepton masses below and above the J/? resonance. We find no evidence for CP or lepton-flavor violation. The partial branching fractions and isospin asymmetries are consistent with the Standard Model predictions and with results from other experiments.

  20. ARM: 10-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Newsom, Rob; Goldsmith, John

    1998-03-01

    10-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

  1. ARM: 1-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Chitra Sivaraman; Connor Flynn

    2004-10-01

    1-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

  2. ARM: 2-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Sivaraman, Chitra; Flynn, Connor

    2004-10-01

    2-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

  3. ARM: 10-second Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Chitra Sivaraman; Connor Flynn

    2004-10-01

    10-second Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

  4. Module 8: Calculating & Using Mixture Ratios ISHI 2010 Mixture Workshop October 11, 2010

    E-Print Network [OSTI]

    ratios · PROTOCOLS ­ Approaches and benefits to calculating mixture ratios ­ Variation across loci Proportion(s) (what is determined from the data by relative peak heights) Other terms sometimes used Mixture proportion (Mx), proportion (p) or mass ratio Mixture ratios can help deduce contributor profiles SWGDAM

  5. ARM: 10-second Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Chitra Sivaraman; Connor Flynn

    10-second Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

  6. ARM: 10-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Chitra Sivaraman; Connor Flynn

    10-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

  7. ARM: 2-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Sivaraman, Chitra; Flynn, Connor

    2-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

  8. ARM: 1-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Chitra Sivaraman; Connor Flynn

    1-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

  9. Effect of Velocity Ratio on Noise Source Distribution of Coaxial Jets Dimitri Papamoschou

    E-Print Network [OSTI]

    Papamoschou, Dimitri

    Effect of Velocity Ratio on Noise Source Distribution of Coaxial Jets Dimitri Papamoschou and Sara source distribution of coaxial jets with a diameter ratio of 1.6 and variable velocity ratio and secondary cores of the jet. For zero velocity ratio (single-stream jet), the region near the nozzle emits

  10. FORMATION OF SiC GRAINS IN PULSATION-ENHANCED DUST-DRIVEN WIND AROUND CARBON-RICH ASYMPTOTIC GIANT BRANCH STARS

    SciTech Connect (OSTI)

    Yasuda, Yuki; Kozasa, Takashi, E-mail: yuki@antares-a.sci.hokudai.ac.jp [Department of Natural History Sciences, Faculty of Science, Hokkaido University, Sapporo 060-0810 (Japan)

    2012-02-01

    We investigate the formation of silicon carbide (SiC) grains in the framework of dust-driven wind around pulsating carbon-rich asymptotic giant branch (C-rich AGB) stars to reveal not only the amount but also the size distribution. Two cases are considered for the nucleation process: one is the local thermal equilibrium (LTE) case where the vibration temperature of SiC clusters T{sub v} is equal to the gas temperature as usual, and another is the non-LTE case in which T{sub v} is assumed to be the same as the temperature of small SiC grains. The results of the hydrodynamical calculations for a model with stellar parameters of mass M{sub *} = 1.0 M{sub Sun }, luminosity L{sub *} = 10{sup 4} L{sub Sun }, effective temperature T{sub eff} = 2600 K, C/O ratio = 1.4, and pulsation period P = 650 days show the following: in the LTE case, SiC grains condense in accelerated outflowing gas after the formation of carbon grains, and the resulting averaged mass ratio of SiC to carbon grains of {approx}10{sup -8} is too small to reproduce the value of 0.01-0.3, which is inferred from the radiative transfer models. On the other hand, in the non-LTE case, the formation region of the SiC grains is more internal and/or almost identical to that of the carbon grains due to the so-called inverse greenhouse effect. The mass ratio of SiC to carbon grains averaged at the outer boundary ranges from 0.098 to 0.23 for the sticking probability {alpha}{sub s} = 0.1-1.0. The size distributions with the peak at {approx}0.2-0.3 {mu}m in radius cover the range of size derived from the analysis of the presolar SiC grains. Thus, the difference between the temperatures of the small cluster and gas plays a crucial role in the formation process of SiC grains around C-rich AGB stars, and this aspect should be explored for the formation process of dust grains in astrophysical environments.

  11. The golden ratio prediction for the solar neutrino mixing

    E-Print Network [OSTI]

    Yuji Kajiyama; Martti Raidal; Alessandro Strumia

    2007-11-28

    We present a simple texture that predicts the cotangent of the solar neutrino mixing angle to be equal to the golden ratio. This prediction is 1.4 standard deviations below the present best-fit value and final SNO and KamLAND data could discriminate it from tri-bi-maximal mixing. The neutrino mass matrix is invariant under a Z_2 x Z'_2 symmetry: that geometrically is a reflection along the diagonal of the golden rectangle. Assuming an analogous structure in the quark sector suggests a golden prediction for the Cabibbo angle, theta_C = pi/4- theta_12 = 13.3 degree, up to uncertainties comparable to V_{ub}.

  12. All Metal Iron Core For A Low Aspect Ratio Tokamak

    SciTech Connect (OSTI)

    D.A. Gates, C. Jun, I. Zatz, A. Zolfaghari

    2010-06-02

    A novel concept for incorporating a iron core transformer within a axisymmetric toroidal plasma containment device with a high neutron flux is described. This design enables conceptual design of low aspect ratio devices which employ standard transformer-driven plasma startup by using all-metal high resistance separators between the toroidal field windings. This design avoids the inherent problems of a multiturn air core transformer which will inevitably suffer from strong neutron bombardment and hence lose the integrity of its insulation, both through long term material degradation and short term neutron- induced conductivity.. A full 3-dimensional model of the concept has been developed within the MAXWELL program and the resultant loop voltage calculated. The utility of the result is found to be dependent on the resistivity of the high resistance separators. Useful loop voltage time histories have been obtained using achievable resistivities.

  13. Modular low-aspect-ratio high-beta torsatron

    DOE Patents [OSTI]

    Sheffield, G.V.

    1982-04-01

    A fusion-reactor device is described which the toroidal magnetic field and at least a portion of the poloidal magnetic field are provided by a single set of modular coils. The coils are arranged on the surface of a low-aspect-ratio toroid in planed having the cylindrical coordinate relationship phi = phi/sub i/ + kz, where k is a constant equal to each coil's pitch and phi/sub i/ is the toroidal angle at which the i'th coil intersects the z = o plane. The toroid defined by the modular coils preferably has a race track minor cross section. When vertical field coils and, preferably, a toroidal plasma current are provided for magnetic-field-surface closure within the toroid, a vacuum magnetic field of racetrack-shaped minor cross section with improved stability and beta valves is obtained.

  14. Internal Energy Dependence of the H + Allene/H + Propyne Product Branching from the Unimolecular Dissociation of 2-Propenyl Radicals

    E-Print Network [OSTI]

    Butler, Laurie J.

    Internal Energy Dependence of the H + Allene/H + Propyne Product Branching from the Unimolecular product channels as a function of internal energy in the dissociating radical isomer. The data resolve with internal energy to the two isomeric product channels: Based on energetic considerations alone, one expects

  15. Effects of K-Reactor pre-operational cold flow testing on total suspended solids in Pen Branch

    SciTech Connect (OSTI)

    Wilde, E.W.

    1991-12-01

    Total suspended solids (TSS) levels were monitored by SRL Environmental Sciences personnel at two locations in the Pen Branch Creek system in conjunction with K Reactor cold flow (pump) testing required as part of the reactor restart effort. The TSS data were compared with flow and rainfall data collected simultaneously in an effort to obtain insight on the suspension and movement for particulate material in the Pen Branch system in response to natural and operational causes. Pump testing clearly caused higher TSS levels at the two sampling locations. The artificially elevated TSS levels were more pronounced at a sampling location near the reactor than at a sampling location farther downstream. Although the environmental data provided by this study were obtained and used exclusively for process control and research purposes, rather than for formal regulatory compliance (i.e. NPDES monitoring), the TSS levels determined by the comprehensive testing were compared with NPDES limits required at various SRS outfalls. TSS values in Pen Branch were seldom in excess of these limits. Because of the relatively few times that TSS values at the two sampling locations exceeded typical'' NPDES limits, and the fact that occasional relatively high TSS values could clearly be solely attributed to rainfall, it was concluded that no major adverse environmental impacts were caused to the Pen Branch system as a result of the K-Reactor pre-operational pump testing.

  16. Effects of K-Reactor pre-operational cold flow testing on total suspended solids in Pen Branch

    SciTech Connect (OSTI)

    Wilde, E.W.

    1991-12-01

    Total suspended solids (TSS) levels were monitored by SRL Environmental Sciences personnel at two locations in the Pen Branch Creek system in conjunction with K Reactor cold flow (pump) testing required as part of the reactor restart effort. The TSS data were compared with flow and rainfall data collected simultaneously in an effort to obtain insight on the suspension and movement for particulate material in the Pen Branch system in response to natural and operational causes. Pump testing clearly caused higher TSS levels at the two sampling locations. The artificially elevated TSS levels were more pronounced at a sampling location near the reactor than at a sampling location farther downstream. Although the environmental data provided by this study were obtained and used exclusively for process control and research purposes, rather than for formal regulatory compliance (i.e. NPDES monitoring), the TSS levels determined by the comprehensive testing were compared with NPDES limits required at various SRS outfalls. TSS values in Pen Branch were seldom in excess of these limits. Because of the relatively few times that TSS values at the two sampling locations exceeded ``typical`` NPDES limits, and the fact that occasional relatively high TSS values could clearly be solely attributed to rainfall, it was concluded that no major adverse environmental impacts were caused to the Pen Branch system as a result of the K-Reactor pre-operational pump testing.

  17. Data Summary Report for the 1997 Semiannual Tritium Survey for Fourmile Branch and the F- and H-Area Seeplines

    SciTech Connect (OSTI)

    Koch, J.W. II

    1998-01-05

    This report presents a summary of the definitive data validation and verification for the 1997 RFI/RI semiannual tritium survey for Fourmile Branch and the F- and H-Area Seeplines. The RFI/RI was performed under the direction of WSRC ESS/Ecology. This report was prepared under the direction EPD/EMS.

  18. Data Summary Report for the 1998 Semiannual Tritium Surveys for Fourmile Branch and the F- and H-Area Seeplines

    SciTech Connect (OSTI)

    Koch, J.

    1999-01-26

    This report presents a summary of the definitive data validation and verification for the 1998 semiannual tritium surveys for Fourmile Branch and the F- and H-Area Seeplines. The project was performed under the direction of WSRC EAS/Ecology. This report was prepared under the direction of EPD/EMS.

  19. Measurement of the Branching Fractions of the Radiative Leptonic ? Decays ? ? e??[bar over ?] and ? ? ???[bar over ?] at BABAR

    E-Print Network [OSTI]

    Lees, J.?P.

    We perform a measurement of the ? ? l??[bar over ?] (l = e,?) branching fractions for a minimum photon energy of 10 MeV in the ? rest frame, using 431??fb[superscript -1] of e[superscript +]e[superscript -] collisions ...

  20. Perimeter growth of a branched structure: Application to crackle sounds in the lung Adriano M. Alencar,1,2,

    E-Print Network [OSTI]

    Stanley, H. Eugene

    Perimeter growth of a branched structure: Application to crackle sounds in the lung Adriano M tree structure. We apply this process to model the inflation of the lung in the airway tree, where the closed and opened regions of the lung. In this context we find that the distribution of time intervals

  1. Development of a branch and price approach involving vertex cloning to solve the maximum weighted independent set problem 

    E-Print Network [OSTI]

    Sachdeva, Sandeep

    2006-04-12

    We propose a novel branch-and-price (B&P) approach to solve the maximum weighted independent set problem (MWISP). Our approach uses clones of vertices to create edge-disjoint partitions from vertex-disjoint partitions. We solve the MWISP on sub...

  2. Software Engineering Software engineering is the branch of systems engineering concerned with the development of large and

    E-Print Network [OSTI]

    Finkelstein, Anthony

    1 of 5 Software Engineering Software engineering is the branch of systems engineering concerned. The professional practice of software engineering is carried out by software engineers, who are qualified by virtue professional body. There are no satisfactory taxonomies of software engineering concerns. Rather there have

  3. COLLEGE/BRANCH CAMPUS-BASED IMPLEMENTATION H QEP Administrative Team led by Vice Provost for Academic Affairs

    E-Print Network [OSTI]

    -curricular unit-level monitoring and support of student commitments and progress (Courses, Communities, e guidelines for planning, annual review, and funding allocation. H Colleges and branch campuses develop implementation plans for advancing student learning and institutional goals of Aggies Commit to Learning

  4. A Theoretical Study of the Reaction Mechanism and Product Branching Ratios of C2H + C2H4 and Related Reactions on the C4H5 Potential Energy Surface

    E-Print Network [OSTI]

    Kaiser, Ralf I.

    (T)/cc-pVQZ//B3LYP/6-311G** calculations of various stationary points on the C4H5 global potential energy surface and Related Reactions on the C4H5 Potential Energy Surface Sergey P. Krishtal and Alexander M. Mebel and absorb solar irradiation preventing Titan's atmosphere from heating up and, thus, being one

  5. Measurement of the branching ratio Γ(Λb0→ψ(2S)Λ0)/Γ(Λb0→J/ψΛ0)

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfate Reducing(JournalspectroscopyReport) | SciTechelement method in the muon+jets final

  6. ISOTOPIC RATIOS IN TITAN's METHANE: MEASUREMENTS AND MODELING

    SciTech Connect (OSTI)

    Nixon, C. A.; Achterberg, R. K.; Temelso, B.; Vinatier, S.; Bezard, B.; Coustenis, A.; Teanby, N. A.; Mandt, K. E.; Sherrill, C. D.; Irwin, P. G. J.; Jennings, D. E.; Romani, P. N.; Flasar, F. M.

    2012-04-20

    The existence of methane in Titan's atmosphere ({approx}6% level at the surface) presents a unique enigma, as photochemical models predict that the current inventory will be entirely depleted by photochemistry in a timescale of {approx}20 Myr. In this paper, we examine the clues available from isotopic ratios ({sup 12}C/{sup 13}C and D/H) in Titan's methane as to the past atmosphere history of this species. We first analyze recent infrared spectra of CH{sub 4} collected by the Cassini Composite Infrared Spectrometer, measuring simultaneously for the first time the abundances of all three detected minor isotopologues: {sup 13}CH{sub 4}, {sup 12}CH{sub 3}D, and {sup 13}CH{sub 3}D. From these we compute estimates of {sup 12}C/{sup 13}C = 86.5 {+-} 8.2 and D/H = (1.59 {+-} 0.33) Multiplication-Sign 10{sup -4}, in agreement with recent results from the Huygens GCMS and Cassini INMS instruments. We also use the transition state theory to estimate the fractionation that occurs in carbon and hydrogen during a critical reaction that plays a key role in the chemical depletion of Titan's methane: CH{sub 4} + C{sub 2}H {yields} CH{sub 3} + C{sub 2}H{sub 2}. Using these new measurements and predictions we proceed to model the time evolution of {sup 12}C/{sup 13}C and D/H in Titan's methane under several prototypical replenishment scenarios. In our Model 1 (no resupply of CH{sub 4}), we find that the present-day {sup 12}C/{sup 13}C implies that the CH{sub 4} entered the atmosphere 60-1600 Myr ago if methane is depleted by chemistry and photolysis alone, but much more recently-most likely less than 10 Myr ago-if hydrodynamic escape is also occurring. On the other hand, if methane has been continuously supplied at the replenishment rate then the isotopic ratios provide no constraints, and likewise for the case where atmospheric methane is increasing. We conclude by discussing how these findings may be combined with other evidence to constrain the overall history of the atmospheric methane.

  7. Utilizing the sequential probability ratio test for building joint monitoring

    SciTech Connect (OSTI)

    Allen, D. W. (David W.); Sohn, H. (Hoon); Worden, K.; Farrar, C. R. (Charles R.)

    2002-01-01

    In this application of the statistical pattern recognition paradigm, a prediction model of a chosen feature is developed from the time domain response of a baseline structure. After the model is developed, subsequent feature sets are tested against the model to determine if a change in the feature has occurred. In the proposed statistical inference for damage identification there are two basic hypotheses; (1) the model can predict the feature, in which case the structure is undamaged or (2) the model can not accurately predict the feature, suggesting that the structure is damaged. The Sequential Probability Ratio Test (SPRT) develops a statistical method that quickly arrives at a decision between these two hypotheses and is applicable to continuous monitoring. In the original formulation of the SPRT algorithm, the feature is assumed to be Gaussian and thresholds are set accordingly. It is likely, however, that the feature used for damage identification is sensitive to the tails of the distribution and that the tails may not necessarily be governed by Gaussian characteristics. By modeling the tails using the technique of Extreme Value Statistics, the hypothesis decision thresholds for the SPRT algorithm may be set avoiding the normality assumption. The SPRT algorithm is utilized to decide if the test structure is undamaged or damaged and which joint is exhibiting the change.

  8. Signal to noise ratio in parametrically-driven oscillators

    E-Print Network [OSTI]

    Adriano A. Batista; Raoni S. N. Moreira

    2011-08-24

    Here we report a theoretical model based on Green's functions and averaging techniques that gives ana- lytical estimates to the signal to noise ratio (SNR) near the first parametric instability zone in parametrically- driven oscillators in the presence of added ac drive and added thermal noise. The signal term is given by the response of the parametrically-driven oscillator to the added ac drive, while the noise term has two dif- ferent measures: one is dc and the other is ac. The dc measure of noise is given by a time-average of the statistically-averaged fluctuations of the position of the parametric oscillator due to thermal noise. The ac measure of noise is given by the amplitude of the statistically-averaged fluctuations at the frequency of the parametric pump. We observe a strong dependence of the SNR on the phase between the external drive and the parametric pump, for some range of the phase there is a high SNR, while for other values of phase the SNR remains flat or decreases with increasing pump amplitude. Very good agreement between analytical estimates and numerical results is achieved.

  9. Big Bang Nucleosynthesis and the Helium Isotope Ratio

    E-Print Network [OSTI]

    Cooke, Ryan

    2015-01-01

    The conventional approach to search for departures from the standard model of physics during Big Bang Nucleosynthesis involves a careful, and subtle measurement of the mass fraction of baryons consisting of helium. Recent measurements of this quantity tentatively support new physics beyond the standard model but, historically, this method has suffered from hidden systematic uncertainties. In this letter, I show that a combined measurement of the primordial deuterium abundance and the primordial helium isotope ratio has the potential to provide a complementary and reliable probe of new physics beyond the standard model. Using the recent determination of the primordial deuterium abundance and assuming that the measured pre-solar 3He/4He meteoritic abundance reflects the primordial value, a bound can be placed on the effective number of neutrino species, Neff(BBN) = 3.01 (+0.95 -0.76, with 95 per cent confidence). Although this value of Neff supports the standard model, it is presently unclear if the pre-solar 3...

  10. A test for asymptotic giant branch evolution theories: Planetary Nebulae in the Large Magellanic Cloud

    E-Print Network [OSTI]

    Ventura, P; Dell'Agli, F; García-Hernández, D A; Di Criscienzo, M

    2015-01-01

    We used a new generation of asymptotic giant branch (AGB) stellar models that include dust formation in the stellar winds to find the links between evolutionary models and the observed properties of a homogeneous sample of Large Magellanic Cloud (LMC) planetary nebulae (PNe). Comparison between the evolutionary yields of elements such as CNO and the corresponding observed chemical abundances is a powerful tool to shed light on evolutionary processes such as hot bottom burning (HBB) and third dredge-up (TDU). We found that the occurrence of HBB is needed to interpret the nitrogen-enriched (log(N/H)+12>8) PNe. In particular, N-rich PNe with the lowest carbon content are nicely reproduced by AGB models of mass M >=6 Mo, whose surface chemistry reflects the pure effects of HBB. PNe with log(N/H)+12<7.5 correspond to ejecta of stars that have not experienced HBB, with initial mass below about 3 Mo. Some of these stars show very large carbon abundances, owing to the many TDU episodes experienced. We found from o...

  11. Stellar structure and mass loss during the early post asymptotic giant branch

    E-Print Network [OSTI]

    Noam Soker; Amos Harpaz

    2002-10-27

    Late asymptotic giant branch (AGB) and early post-AGB stars which are progenitors of planetary nebulae lose mass at extremely high rate, in what is termed a superwind. We show that the existence of this superwind during the post-AGB phase cannot be explained with models where the stellar effective temperature is the sole main physical parameter which determine the mass loss rate. Instead, we argue that the envelope structure, in particular the entropy and density gradients, should be among the main parameters which determine the mass loss rate on the tip of the AGB and the early post-AGB evolutionary phases. The entropy profile becomes steeper and the density profile becomes shallower as the star becomes hotter on the early post-AGB phase, until the star heats-up to about 8000 K. We do not propose a new mass loss mechanism, but rather mention several mechanisms by which these profiles may influence the mass loss rate within the popular mechanism for mass loss on the AGB, where pulsations coupled with radiation pressure on dust cause the high mass loss rate.

  12. New antineutrino energy spectra predictions from the summation of beta decay branches of the fission products

    E-Print Network [OSTI]

    M. Fallot; S. Cormon; M. Estienne; A. Algora; V. M. Bui; A. Cucoanes; M. Elnimr; L. Giot; D. Jordan; J. Martino; A. Onillon; A. Porta; G. Pronost; A. Remoto; J. L. Taín; F. Yermia; A. -A. Zakari-Issoufou

    2012-09-13

    In this paper, we study the impact of the inclusion of the recently measured beta decay properties of the $^{102;104;105;106;107}$Tc, $^{105}$Mo, and $^{101}$Nb nuclei in an updated calculation of the antineutrino energy spectra of the four fissible isotopes $^{235, 238}$U, and $^{239,241}$Pu. These actinides are the main contributors to the fission processes in Pressurized Water Reactors. The beta feeding probabilities of the above-mentioned Tc, Mo and Nb isotopes have been found to play a major role in the $\\gamma$ component of the decay heat of $^{239}$Pu, solving a large part of the $\\gamma$ discrepancy in the 4 to 3000\\,s range. They have been measured using the Total Absorption Technique (TAS), avoiding the Pandemonium effect. The calculations are performed using the information available nowadays in the nuclear databases, summing all the contributions of the beta decay branches of the fission products. Our results provide a new prediction of the antineutrino energy spectra of $^{235}$U, $^{239,241}$Pu and in particular of $^{238}$U for which no measurement has been published yet. We conclude that new TAS measurements are mandatory to improve the reliability of the predicted spectra.

  13. DOUBLE HORIZONTAL BRANCHES IN NGC 6440 AND NGC 6569 UNVEILED BY THE VVV SURVEY

    SciTech Connect (OSTI)

    Mauro, Francesco; Bidin, Christian Moni; Cohen, Roger; Geisler, Doug; Chene, Andre-Nicolas; Villanova, Sandro; Minniti, Dante; Catelan, Marcio

    2012-12-20

    We report the discovery of a peculiar horizontal branch (HB) in NGC 6440 and NGC 6569, two massive and metal-rich Galactic globular clusters (GGCs) located in the Galactic bulge, within 4 kpc from the Galactic center. In both clusters, two distinct clumps are detected at the level of the cluster HB, separated by only {approx}0.1 mag in the K{sub s} band. They were detected with IR photometric data collected with the 'VISTA Variables in the Via Lactea' Survey, and confirmed in independent IR catalogs available in the literature and Hubble Space Telescope optical photometry. Our analysis demonstrates that these clumps are real cluster features, not a product of field contamination or interstellar reddening. The observed split HBs could be a signature of two stellar sub-populations with different chemical composition and/or age, as recently found in Terzan 5, but it cannot be excluded that they are caused by evolutionary effects, in particular for NGC 6440. This interpretation, however, requires an anomalously high helium content (Y > 0.30). Our discovery suggests that such a peculiar HB morphology could be a common feature of massive, metal-rich bulge GGCs.

  14. Helium enhancements in globular cluster stars from Asymptotic Giant Branch star pollution

    E-Print Network [OSTI]

    Amanda Karakas; Yeshe Fenner; Alison Sills; Simon Campbell; John Lattanzio

    2006-05-21

    Using a chemical evolution model we investigate the intriguing suggestion that there are populations of stars in some globular clusters (e.g. NGC 2808, omega Centauri) with enhanced levels of helium (Y from about 0.28 to 0.40) compared to the majority of the population that presumably have a primordial helium abundance. We assume that a previous generation of massive low-metallicity Asymptotic Giant Branch (AGB) stars has polluted the cluster gas via a slow stellar wind. We use two independent sets of AGB yields computed from detailed models to follow the evolution of helium, carbon, nitrogen and oxygen in the cluster gas using a Salpeter initial mass function (IMF) and a number of top-heavy IMFs. In no case were we able to fit the observational constraints, Y > 0.30 and C+N+O approximately constant. Depending on the shape of the IMF and the yields, we either obtained Y approximately greater than 0.30 and large increases in C+N+O or Y < 0.30 and C+N+O approximately constant. These results suggest that either AGB stars alone are not responsible for the large helium enrichment or that any dredge-up from this generation of stars was less than predicted by standard models.

  15. FLUORINE IN THE SOLAR NEIGHBORHOOD: IS IT ALL PRODUCED IN ASYMPTOTIC GIANT BRANCH STARS?

    SciTech Connect (OSTI)

    Jönsson, H.; Ryde, N. [Lund Observatory, Department of Astronomy and Theoretical Physics, Lund University, Box 43, SE-221 00 Lund (Sweden); Harper, G. M. [School of Physics, Trinity College, Dublin 2 (Ireland); Richter, M. J. [Physics Department, University of California, Davis, CA 95616 (United States); Hinkle, K. H., E-mail: henrikj@astro.lu.se [National Optical Astronomy Observatory, P.O. Box 26732, Tucson, AZ 85726 (United States)

    2014-07-10

    The origin of ''cosmic'' fluorine is uncertain, but there are three proposed production sites/mechanisms for the origin: asymptotic giant branch (AGB) stars, ? nucleosynthesis in Type II supernovae, and/or the winds of Wolf-Rayet stars. The relative importance of these production sites has not been established even for the solar neighborhood, leading to uncertainties in stellar evolution models of these stars as well as uncertainties in the chemical evolution models of stellar populations. We determine the fluorine and oxygen abundances in seven bright, nearby giants with well determined stellar parameters. We use the 2.3 ?m vibrational-rotational HF line and explore a pure rotational HF line at 12.2 ?m. The latter has never been used before for an abundance analysis. To be able to do this, we have calculated a line list for pure rotational HF lines. We find that the abundances derived from the two diagnostics agree. Our derived abundances are well reproduced by chemical evolution models including only fluorine production in AGB stars and, therefore, we draw the conclusion that this might be the main production site of fluorine in the solar neighborhood. Furthermore, we highlight the advantages of using the 12 ?m HF lines to determine the possible contribution of the ? process to the fluorine budget at low metallicities where the difference between models including and excluding this process is dramatic.

  16. The orbital evolution of asteroids, pebbles and planets from giant branch stellar radiation and winds

    E-Print Network [OSTI]

    Veras, Dimitri; Gaensicke, Boris T

    2015-01-01

    The discovery of over 50 planets around evolved stars and more than 35 debris discs orbiting white dwarfs highlight the increasing need to understand small body evolution around both early and asymptotic giant branch (GB) stars. Pebbles and asteroids are susceptible to strong accelerations from the intense luminosity and winds of GB stars. Here, we establish equations that can model time-varying GB stellar radiation, wind drag and mass loss. We derive the complete three-dimensional equations of motion in orbital elements due to (1) the Epstein and Stokes regimes of stellar wind drag, (2) Poynting-Robertson drag, and (3) the Yarkovsky drift with seasonal and diurnal components. We prove through averaging that the potential secular eccentricity and inclination excitation due to Yarkovsky drift can exceed that from Poynting-Robertson drag and radiation pressure by at least three orders of magnitude, possibly flinging asteroids which survive YORP spin-up into a widely dispersed cloud around the resulting white dw...

  17. Constraints on helium enhancement in the globular cluster M4 (NGC 6121): The horizontal branch test

    SciTech Connect (OSTI)

    Valcarce, A. A. R.; De Medeiros, J. R.; Catelan, M.; Alonso-García, J.; Cortés, C.

    2014-02-20

    Recent pieces of evidence have revealed that most, and possibly all, globular star clusters are composed of groups of stars that formed in multiple episodes with different chemical compositions. In this sense, it has also been argued that variations in the initial helium abundance (Y) from one population to the next are also the rule, rather than the exception. In the case of the metal-intermediate globular cluster M4 (NGC 6121), recent high-resolution spectroscopic observations of blue horizontal branch (HB) stars (i.e., HB stars hotter than the RR Lyrae instability strip) suggest that a large fraction of blue HB stars are second-generation stars formed with high helium abundances. In this paper, we test this scenario by using recent photometric and spectroscopic data together with theoretical evolutionary computations for different Y values. Comparing the photometric data with the theoretically derived color-magnitude diagrams, we find that the bulk of the blue HB stars in M4 have ?Y ? 0.01 with respect to the cluster's red HB stars (i.e., HB stars cooler than the RR Lyrae strip)—a result which is corroborated by comparison with spectroscopically derived gravities and temperatures, which also favor little He enhancement. However, the possible existence of a minority population on the blue HB of the cluster with a significant He enhancement level is also discussed.

  18. Rubidium, zirconium, and lithium production in intermediate-mass asymptotic giant branch stars

    E-Print Network [OSTI]

    van Raai, Mark A; Karakas, Amanda I; Garcia-Hernandez, Domingo A; Yong, David

    2012-01-01

    A recent survey of a large sample of Galactic intermediate-mass (>3 Msun) asymptotic giant branch (AGB) stars shows that they exhibit large overabundances of rubidium (Rb) up to 100--1000 times solar. These observations set constraints on our theoretical notion of the slow neutron capture process (s process) that occurs inside intermediate-mass AGB stars. Lithium (Li) abundances are also reported for these stars. In intermediate-mass AGB stars, Li can be produced by proton captures occuring at the base of the convective envelope. For this reason the observations of Rb, Zr, and Li set complementary constraints on different processes occurring in the same stars. We present predictions for the abundances of Rb, Zr, and Li as computed for the first time simultaneously in intermediate-mass AGB star models and compare them to the current observational constraints. We find that the Rb abundance increases with increasing stellar mass, as is inferred from observations but we are unable to match the highest observed [R...

  19. Evolution and nucleosynthesis of helium-rich asymptotic giant branch models

    E-Print Network [OSTI]

    Shingles, Luke J; Karakas, Amanda I; Stancliffe, Richard J; Lattanzio, John C; Lugaro, Maria

    2015-01-01

    There is now strong evidence that some stars have been born with He mass fractions as high as $Y \\approx 0.40$ (e.g., in $\\omega$ Centauri). However, the advanced evolution, chemical yields, and final fates of He-rich stars are largely unexplored. We investigate the consequences of He-enhancement on the evolution and nucleosynthesis of intermediate-mass asymptotic giant branch (AGB) models of 3, 4, 5, and 6 M$_\\odot$ with a metallicity of $Z = 0.0006$ ([Fe/H] $\\approx -1.4$). We compare models with He-enhanced compositions ($Y=0.30, 0.35, 0.40$) to those with primordial He ($Y=0.24$). We find that the minimum initial mass for C burning and super-AGB stars with CO(Ne) or ONe cores decreases from above our highest mass of 6 M$_\\odot$ to $\\sim$ 4-5 M$_\\odot$ with $Y=0.40$. We also model the production of trans-Fe elements via the slow neutron-capture process (s-process). He-enhancement substantially reduces the third dredge-up efficiency and the stellar yields of s-process elements (e.g., 90% less Ba for 6 M$_\\o...

  20. STATISTICAL DAMAGE CLASSIFICATION USING SEQUENTIAL PROBABILITY RATIO TESTS.

    SciTech Connect (OSTI)

    SOHN, HOON; ALLEN, DAVID W; WORDEN, KEITH; FARRAR, CHARLES R

    2002-02-16

    The primary objective of damage detection is to ascertain with confidence if damage is present or not within a structure of interest. In this study, a damage classification problem is cast in the context of the statistical pattern recognition paradigm. First, a time prediction model, called an autoregressive and autoregressive with exogenous inputs (AR-ARX) model, is fit to a vibration signal measured during a normal operating condition of the structure. When a new time signal is recorded from an unknown state of the system, the prediction errors are computed for the new data set using the time prediction model. When the structure undergoes structural degradation, it is expected that the prediction errors will increase for the damage case. Based on this premise, a damage classifier is constructed using a sequential hypothesis testing technique called the sequential probability ratio test (SPRT). The SPRT is one form of parametric statistical inference tests, and the adoption of the SPRT to damage detection problems can improve the early identification of conditions that could lead to performance degradation and safety concerns. The sequential test assumes a probability distribution of the sample data sets, and a Gaussian distribution of the sample data sets is often used. This assumption, however, might impose potentially misleading behavior on the extreme values of the data, i.e. those points in the tails of the distribution. As the problem of damage detection specifically focuses attention on the tails, the assumption of normality is likely to lead the analysis astray. To overcome this difficulty, the performance of the SPRT is improved by integrating extreme values statistics, which specifically models behavior in the tails of the distribution of interest into the SPRT.

  1. ESTRATEGIAS DE REPODUCTIVAS: SEX RATIO Y SELECCIN SEXUAL Seleccin sexual: tambin en especies mongamas

    E-Print Network [OSTI]

    Seoane, Javier

    ESTRATEGIAS DE REPODUCTIVAS: SEX RATIO Y SELECCIÓN SEXUAL Selección sexual: también en especies respuesta inmunitaria. #12;ESTRATEGIAS DE REPODUCTIVAS: SEX RATIO Y SELECCIÓN SEXUAL Pesomediodelospollos el número de huevos pálidos. #12;ESTRATEGIAS DE REPRODUCTIVAS: SELECCIÓN SEXUAL (1) ¿Es la intensidad

  2. Effects of operating conditions, compression ratio, and gasoline reformate on SI engine knock limits

    E-Print Network [OSTI]

    Gerty, Michael D

    2005-01-01

    A set of experiments was performed to investigate the effects of air-fuel ratio, inlet boost pressure, hydrogen rich fuel reformate, and compression ratio on engine knock behavior. For each condition the effect of spark ...

  3. REAL-TIME NONLINEAR INDIVIDUAL CYLINDER AIR FUEL RATIO OBSERVER ON

    E-Print Network [OSTI]

    an estimator of the individual cylinder air fuel ratios in a turbocharged Diesel Engine using as only sensor

  4. Caste ratios affect the reproductive output of social trematode T. KAMIYA & R. POULIN

    E-Print Network [OSTI]

    Poulin, Robert

    Caste ratios affect the reproductive output of social trematode colonies T. KAMIYA & R. POULIN Department of Zoology, University of Otago, Dunedin, New Zealand Keywords: caste ratio; optimal ratio theory phenotypic diversification in social organisms often leads to formation of physical castes which

  5. Ecological context and metapopulation dynamics affect sex-ratio variation among dioecious plant populations

    E-Print Network [OSTI]

    Barrett, Spencer C.H.

    Ecological context and metapopulation dynamics affect sex-ratio variation among dioecious plant the literature were analysed to investigate ecological correlates of among- population sex-ratio variation-ratio bias was associated with the proportion of non-repro- ductive individuals, with greater male bias

  6. Gametocyte sex ratio of a malaria parasite: response to experimental manipulation of parasite clonal diversity

    E-Print Network [OSTI]

    Schall, Joseph J.

    ratio theory posits that the adaptive proportion of male to female gametocytes of a malaria parasite are suggested for the observed variation of gametocyte sex ratio among P. mexicanum infections. Key words- Chwatt, 1985). The gametocyte sex ratio, or proportion of male to female gametocytes in the vertebrate

  7. Influence of Sibling Competition on Nestling Sex Ratios of Sexually Dimorphic Gary R. Bortolotti

    E-Print Network [OSTI]

    Bortolotti, Gary R.

    Influence of Sibling Competition on Nestling Sex Ratios of Sexually Dimorphic Birds Gary R Natural~st April 1986 INFLUENCE OF SIBLING COMPETITION ON NESTLING SEX RATIOS OF SEXUALLY DIMORPHIC BIRDS) and the rate of offspring mortality (Fisher 1930; Leigh 1970). The nestling sex ratio of altricial birds

  8. Adaptive sex ratio variation in pre-industrial human (Homo sapiens) populations?

    E-Print Network [OSTI]

    Lummaa, Virpi

    Adaptive sex ratio variation in pre-industrial human (Homo sapiens) populations? Virpi Lummaa-20014 Turku, Finland Sex allocation theory predicts that in a population with a biased operational sex ratio (OSR), parents will increase their ¢tness by adjusting the sex ratio of their progeny towards

  9. Numerical Study of Large Aspect-Ratio Synthetic Jets B. R. Ravi*

    E-Print Network [OSTI]

    Mittal, Rajat

    Numerical Study of Large Aspect-Ratio Synthetic Jets B. R. Ravi* and R. Mittal Department jets. A rectangular synthetic jet of aspect-ratio (AR) 8.0 issuing into quiescent air at jet Reynolds number of 300 and Stokes numbers of 6.84 and a jet of infinite aspect ratio with jet Reynolds number 200

  10. Operational restoration of the Pen Branch bottomland hardwood and swamp wetlands - the research setting

    SciTech Connect (OSTI)

    Nelson, E.A.

    2000-01-05

    The Savannah River Swamp is a 3020 Ha forested wetland on the floodplain of the Savannah River and is located on the Department of Energy's Savannah River Site (SRS) near Aiken, SC. Historically the swamp consisted of approximately 50 percent bald cypress-water tupelo stands, 40 percent mixed bottomland hardwood stands, and 10 percent shrub, marsh, and open water. Creek corridors were typical of Southeastern bottomland hardwood forests. The hydrology was controlled by flooding of the Savannah River and by flow from four creeks that drain into the swamp prior to flow into the Savannah River. Upstream dams have caused some alteration of the water levels and timing of flooding within the floodplain. Major impacts to the swamp hydrology occurred with the completion of the production reactors and one coal-fired powerhouse at the SRS in the early 1950's. Water was pumped from the Savannah River, through secondary heat exchangers of the reactors, and discharged into three of the tributary streams that flow into the swamp. Flow in one of the tributaries, Pen Branch, was typically 0.3 m3 s-1 (10-20) cfs prior to reactor pumping and 11.0 m3 s-1 (400 cfs) during pumping. This continued from 1954 to 1988 at various levels. The sustained increases in water volume resulted in overflow of the original stream banks and the creation of additional floodplains. Accompanying this was considerable erosion of the original stream corridor and deposition of a deep silt layer on the newly formed delta. Heated water was discharged directly into Pen Branch and water temperature in the stream often exceeded 65 degrees C. The nearly continuous flooding of the swamp, the thermal load of the water, and the heavy silting resulted in complete mortality of the original vegetation in large areas of the floodplain. In the years since pumping was reduced, early succession has begun in some affected areas. Most of this has been herbs, grasses, and shrubs. Areas that have seedlings are generally willow thickets that support a lower diversity of wildlife. No volunteer seedlings of heavy-seeded hardwoods or cypress have been found in the corridor areas. Research was conducted to determine methods to reintroduce tree species characteristic of more mature forested wetlands. Three restoration strategies were formulated to deal with the differing conditions of the Upper Corridor, the Lower Corridor, and the Delta regions of the impacted area. Site preparation and planting of each area with mixtures of tree species were carried out to speed the restoration of the ecosystem. Species composition and selection were altered based on the current and expected hydrological regimes that the reforestation areas will be experiencing. Because of the operational design of the restoration project, a research program naturally followed to document the success. Many of those efforts are detailed here.

  11. Do Coupled Climate Models Correctly SImulate the Upward Branch of the Deept Ocean Global Conveyor?

    SciTech Connect (OSTI)

    Sarmiento, Jorge L; Downes, Stephanie; Bianchi, Daniele

    2013-01-17

    The large-scale meridional overturning circulation (MOC) connects the deep ocean, a major reservoir of carbon, to the other components of the climate system and must therefore be accurately represented in Earth System Models. Our project aims to address the specific question of the pathways and mechanisms controlling the upwelling branch of the MOC, a subject of significant disagreement between models and observational syntheses, and among general circulation models. Observations of these pathways are limited, particularly in regions of complex hydrography such as the Southern Ocean. As such, we rely on models to examine theories of the overturning circulation, both physically and biogeochemically. This grant focused on a particular aspect of the meridional overturning circulation (MOC) where there is currently significant disagreement between models and observationally based analyses of the MOC, and amongst general circulation models. In particular, the research focused on addressing the following questions: 1. Where does the deep water that sinks in the polar regions rise to the surface? 2. What processes are responsible for this rise? 3. Do state-of-the-art coupled GCMs capture these processes? Our research had three key components: observational synthesis, model development and model analysis. In this final report we outline the key results from these areas of research for the 2007 to 2012 grant period. The research described here was carried out primarily by graduate student, Daniele Bianchi (now a Postdoc at McGill University, Canada), and Postdoc Stephanie Downes (now a Research Fellow at The Australian national University, Australia). Additional support was provided for programmers Jennifer Simeon as well as Rick Slater.

  12. Modeling the Effect of Sedimentation on Cesium Transport in Fourmile Branch

    SciTech Connect (OSTI)

    Chen, K.F.

    2001-02-22

    The major mechanisms of radioactive material transport and fate in surface water are (1) sources, (2) dilution, advection and dispersion of radionuclides by flow and surface waves, (3) radionuclide decay, and (4) interaction between sediment and radionuclides. STREAM II, an aqueous transport module of the Savannah River Site emergency response WIND system, accounts for the source term, and the effects of dilution, advection and dispersion. Although the model has the capability to account for nuclear decay, due to the short time interval of interest for emergency response, the effect of nuclear decay is very small and so it is not employed. The interactions between the sediment and radionuclides are controlled by the flow conditions and physical and chemical characteristics of the radionuclides and the sediment constituents. The STREAM II version used in emergency response does not model the effects of sediment deposition/resuspension to minimize computing time. This study estimates the effects of sediment deposition/resuspension on radionuclide aqueous transport. For radionuclides that adsorb onto suspended sediment, the omission of deposition/resuspension effects overestimates the downstream radionuclide peak concentration and is therefore conservative. For the case of cesium transport in the Fourmile Branch, the calculated reduction in peak concentration as the cesium is transported downstream is greater with sediment deposition modeled than without. For example, including the effects of sediment deposition/resuspension in the STREAM II calculation results in a 72 percent reduction in the downstream (5075 meters downstream from H-Area) peak cesium concentration. It is important to note that the high partition coefficient appropriate for cesium enhances the importance of sediment deposition/resuspension; the reduction in the calculated peak concentration would be less for radioisotopes with lower partition coefficients.

  13. Electron-capture supernovae of super-asymptotic giant branch stars and the Crab supernova 1054

    SciTech Connect (OSTI)

    Nomoto, Ken'ichi [Kavli Institute for Physics and Mathematics of the Universe (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583 (Japan); Tominaga, Nozomu [Department of Physics, Faculty of Science and Engineering, Konan University, 8-9-1 Okamoto, Kobe, Hyogo 658-8501, Japan and Kavli Institute for Physics and Mathematics of the Universe (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583 (Japan); Blinnikov, Sergei I. [Institute for Theoretical and Experimental Physics (ITEP), Moscow 117218, Russia and Kavli Institute for Physics and Mathematics of the Universe (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583 (Japan)

    2014-05-02

    An electron-capture supernova (ECSN) is a core-collapse supernova explosion of a super-asymptotic giant branch (SAGB) star with a main-sequence mass M{sub Ms} ? 7 - 9.5M{sub ?}. The explosion takes place in accordance with core bounce and subsequent neutrino heating and is a unique example successfully produced by first-principle simulations. This allows us to derive a first self-consistent multicolor light curves of a core-collapse supernova. Adopting the explosion properties derived by the first-principle simulation, i.e., the low explosion energy of 1.5 × 10{sup 50} erg and the small {sup 56}Ni mass of 2.5 × 10{sup ?3} M{sub ?}, we perform a multigroup radiation hydrodynamics calculation of ECSNe and present multicolor light curves of ECSNe of SAGB stars with various envelope mass and hydrogen abundance. We demonstrate that a shock breakout has peak luminosity of L ? 2 × 10{sup 44} erg s{sup ?1} and can evaporate circumstellar dust up to R ? 10{sup 17} cm for a case of carbon dust, that plateau luminosity and plateau duration of ECSNe are L ? 10{sup 42} erg s{sup ?1} and {sup t} ? 60 - 100 days, respectively, and that a plateau is followed by a tail with a luminosity drop by ? 4 mag. The ECSN shows a bright and short plateau that is as bright as typical Type II plateau supernovae, and a faint tail that might be influenced by spin-down luminosity of a newborn pulsar. Furthermore, the theoretical models are compared with ECSN candidates: SN 1054 and SN 2008S. We find that SN 1054 shares the characteristics of the ECSNe. For SN 2008S, we find that its faint plateau requires a ECSN model with a significantly low explosion energy of E ? 10{sup 48} erg.

  14. Nucleosynthesis in helium-enriched asymptotic giant branch models: Implications for heavy element enrichment in ? Centauri

    SciTech Connect (OSTI)

    Karakas, Amanda I.; Marino, Anna F.; Nataf, David M., E-mail: Amanda.Karakas@anu.edu.au [Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2611 (Australia)

    2014-03-20

    We investigate the effect of helium enrichment on the evolution and nucleosynthesis of low-mass asymptotic giant branch (AGB) stars of 1.7 M {sub ?} and 2.36 M {sub ?} with a metallicity of Z = 0.0006 ([Fe/H] ?–1.4). We calculate evolutionary sequences with the primordial helium abundance (Y = 0.24) and with helium-enriched compositions (Y = 0.30, 0.35, 0.40). For comparison, we calculate models of the same mass but at a lower metallicity Z = 0.0003 ([Fe/H] ?–1.8) with Y = 0.24. Post-processing nucleosynthesis calculations are performed on each of the evolutionary sequences to determine the production of elements from hydrogen to bismuth. Elemental surface abundance predictions and stellar yields are presented for each model. The models with enriched helium have shorter main sequence and AGB lifetimes, and they enter the AGB with a more massive hydrogen-exhausted core than the primordial helium model. The main consequences are as follows: (1) low-mass AGB models with enhanced helium will evolve more than twice as fast, giving them the chance to contribute sooner to the chemical evolution of the forming globular clusters, and (2) the stellar yields will be strongly reduced relative to their primordial helium counterparts. An increase of ?Y = 0.10 at a given mass decreases the yields of carbon by up to ?60% and of fluorine by up to 80%; it also decreases the yields of the s-process elements barium and lanthanum by ?45%. While the yields of first s-process peak elements strontium, yttrium, and zirconium decrease by up to 50%, the yields of rubidium either do not change or increase.

  15. Measurement of the branching fraction Bs->Ds(*)Ds(*) using the D0 detector at Fermilab

    SciTech Connect (OSTI)

    Walder, James William; /Lancaster U.

    2009-02-01

    This thesis describes a measurement of the branching fraction Br(B{sup 0}{sub s} {yields} D{sup (*)}{sub s} D{sup (*)}{sub s}) made using a data sample collected from proton-antiproton collisions at a centre-of-mass energy of 1.96 TeV, corresponding to approximately 1.3 fb{sup -1} of integrated luminosity collected in 2002--2006 by the D0 detector at the Fermilab Tevatron Collider. One D{sup (*)}{sub s} meson was partially reconstructed in the decay D{sub s} {yields} {phi}{mu}{nu}, and the other D{sup (*)}{sub s} meson was identified using the decay D{sub s} {yields} {phi}{pi} where no attempt was made to distinguish D{sub s} and D{sup *}{sub s} states. The resulting measurement is Br(B{sup 0}{sub s} {yields} D{sup (*)}{sub s} D{sup (*)}{sub s}) = 0.039{sup +0.019}{sub -0.017}(stat){sup +0.016}{sub -0.015}(syst). This was subsequently used to estimate the width difference {Delta}{Gamma}{sup CP}{sub s} in the B{sup 0}{sub s}-{anti B}{sup 0}{sub s} system: {Delta}{Gamma}{sup CP}{sub s}/{Gamma}{sub s} = 0.079{sup +0.038}{sub -0.035}(stat){sup +0.031}{sub 0.030}(syst), and is currently one of the most precise estimates of this quantity and consistent with the Standard Model.

  16. Evolution and nucleosynthesis of asymptotic giant branch stellar models of low metallicity

    SciTech Connect (OSTI)

    Fishlock, Cherie K.; Karakas, Amanda I.; Yong, David [Research School of Astronomy and Astrophysics, Australian National University, Canberra ACT 2611 (Australia); Lugaro, Maria, E-mail: cherie.fishlock@anu.edu.au, E-mail: amanda.karakas@anu.edu.au, E-mail: david.yong@anu.edu.au, E-mail: maria.lugaro@monash.edu [Monash Centre for Astrophysics, Monash University, Clayton VIC 3800 (Australia)

    2014-12-10

    We present stellar evolutionary tracks and nucleosynthetic predictions for a grid of stellar models of low- and intermediate-mass asymptotic giant branch (AGB) stars at Z = 0.001 ([Fe/H] =–1.2). The models cover an initial mass range from 1 M {sub ?} to 7 M {sub ?}. Final surface abundances and stellar yields are calculated for all elements from hydrogen to bismuth as well as isotopes up to the iron group. We present the first study of neutron-capture nucleosynthesis in intermediate-mass AGB models, including a super-AGB model, of [Fe/H] = –1.2. We examine in detail a low-mass AGB model of 2 M {sub ?} where the {sup 13}C(?,n){sup 16}O reaction is the main source of neutrons. We also examine an intermediate-mass AGB model of 5 M {sub ?} where intershell temperatures are high enough to activate the {sup 22}Ne neutron source, which produces high neutron densities up to ?10{sup 14} n cm{sup –3}. Hot bottom burning is activated in models with M ? 3 M {sub ?}. With the 3 M {sub ?} model, we investigate the effect of varying the extent in mass of the region where protons are mixed from the envelope into the intershell at the deepest extent of each third dredge-up. We compare the results of the low-mass models to three post-AGB stars with a metallicity of [Fe/H] ? – 1.2. The composition is a good match to the predicted neutron-capture abundances except for Pb and we confirm that the observed Pb abundances are lower than what is calculated by AGB models.

  17. An approach to determine a defensible spent fuel ratio.

    SciTech Connect (OSTI)

    Durbin, Samuel G.; Lindgren, Eric Richard

    2014-03-01

    Sabotage of spent nuclear fuel casks remains a concern nearly forty years after attacks against shipment casks were first analyzed and has a renewed relevance in the post-9/11 environment. A limited number of full-scale tests and supporting efforts using surrogate materials, typically depleted uranium dioxide (DUO2), have been conducted in the interim to more definitively determine the source term from these postulated events. In all the previous studies, the postulated attack of greatest interest was by a conical shape charge (CSC) that focuses the explosive energy much more efficiently than bulk explosives. However, the validity of these large-scale results remain in question due to the lack of a defensible Spent Fuel Ratio (SFR), defined as the amount of respirable aerosol generated by an attack on a mass of spent fuel compared to that of an otherwise identical DUO2 surrogate. Previous attempts to define the SFR have resulted in estimates ranging from 0.42 to 12 and include suboptimal experimental techniques and data comparisons. Different researchers have suggested using SFR values of 3 to 5.6. Sound technical arguments exist that the SFR does not exceed a value of unity. A defensible determination of the SFR in this lower range would greatly reduce the calculated risk associated with the transport and dry storage of spent nuclear fuel. Currently, Oak Ridge National Laboratory (ORNL) is in possession of several samples of spent nuclear fuel (SNF) that were used in the original SFR studies in the 1980's and were intended for use in a modern effort at Sandia National Laboratories (SNL) in the 2000's. A portion of these samples are being used for a variety of research efforts. However, the entirety of SNF samples at ORNL is scheduled for disposition at the Waste Isolation Pilot Plant (WIPP) by approximately the end of 2015. If a defensible SFR is to be determined for use in storage and transportation security analyses, the need to begin this effort is urgent in order to secure the only known available SNF samples with a clearly defined path to disposal.

  18. 1HERSA1 S001 we come to you 1300 301 275 visit a branch stgeorge.com.au/save

    E-Print Network [OSTI]

    Peters, Richard

    1HERSA1 S001 we come to you 1300 301 275 visit a branch stgeorge.com.au/save Conditions apply.George Bank Limited ABN 92 055 513 070 AFS Licence No. 240997. SGBSHL0058/F1/R Want to save more on your home-HERALD We saved Meg $4806* on her home loan over 12 months. Challenge the Home Lender of the Year today

  19. Towards engineered branch placement: Unreal™ match between vapour-liquid-solid glancing angle deposition nanowire growth and simulation

    SciTech Connect (OSTI)

    Taschuk, M. T.; Tucker, R. T.; LaForge, J. M.; Beaudry, A. L. [Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta T6H 2V4 (Canada); Kupsta, M. R. [NRC National Institute for Nanotechnology, Edmonton, Alberta T6G 2M9 (Canada); Brett, M. J. [Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta T6H 2V4 (Canada); NRC National Institute for Nanotechnology, Edmonton, Alberta T6G 2M9 (Canada)

    2013-12-28

    The vapour-liquid-solid glancing angle deposition (VLS-GLAD) process is capable of producing complex nanotree structures with control over azimuthal branch orientation and height. We have developed a thin film growth simulation including ballistic deposition, simplified surface diffusion, and droplet-mediated cubic crystal growth for the VLS-GLAD process using the Unreal{sup TM} Development Kit. The use of a commercial game engine has provided an interactive environment while allowing a custom physics implementation. Our simulation's output is verified against experimental data, including a volumetric film reconstruction produced using focused ion beam and scanning-electron microscopy (SEM), crystallographic texture, and morphological characteristics such as branch orientation. We achieve excellent morphological and texture agreement with experimental data, as well as qualitative agreement with SEM imagery. The simplified physics in our model reproduces the experimental films, indicating that the dominant role flux geometry plays in the VLS-GLAD competitive growth process responsible for azimuthally oriented branches and biaxial crystal texture evolution. The simulation's successful reproduction of experimental data indicates that it should have predictive power in designing novel VLS-GLAD structures.

  20. The impact of equivalence ratio oscillations on combustion dynamics in a backward-facing step combustor

    SciTech Connect (OSTI)

    Murat Altay, H.; Speth, Raymond L.; Hudgins, Duane E.; Ghoniem, Ahmed F.

    2009-11-15

    The combustion dynamics of propane-air flames are investigated in an atmospheric pressure, atmospheric inlet temperature, lean, premixed backward-facing step combustor. We modify the location of the fuel injector to examine the impact of equivalence ratio oscillations arriving at the flame on the combustion dynamics. Simultaneous pressure, velocity, heat-release rate and equivalence ratio measurements and high-speed video from the experiments are used to identify and characterize several distinct operating modes. When the fuel is injected far upstream from the step, the equivalence ratio arriving at the flame is steady and the combustion dynamics are controlled only by flame-vortex interactions. In this case, different dynamic regimes are observed depending on the operating parameters. When the fuel is injected close to the step, the equivalence ratio arriving at the flame exhibits oscillations. In the presence of equivalence ratio oscillations, the measured sound pressure level is significant across the entire range of lean mean equivalence ratios even if the equivalence ratio oscillations arriving at the flame are out-of-phase with the pressure oscillations. The combustion dynamics are governed primarily by the flame-vortex interactions, while the equivalence ratio oscillations have secondary effects. The equivalence ratio oscillations could generate variations in the combustion dynamics in each cycle under some operating conditions, destabilize the flame at the entire range of the lean equivalence ratios, and increase the value of the mean equivalence ratio at the lean blowout limit. (author)

  1. Finite range and upper branch effects on itinerant ferromagnetism in repulsive Fermi gases: Bethe–Goldstone ladder resummation approach

    SciTech Connect (OSTI)

    He, Lianyi

    2014-12-15

    We investigate the ferromagnetic transition in repulsive Fermi gases at zero temperature with upper branch and effective range effects. Based on a general effective Lagrangian that reproduces precisely the two-body s-wave scattering phase shift, we obtain a nonperturbative expression of the energy density as a function of the polarization by using the Bethe–Goldstone ladder resummation. For hard sphere potential, the predicted critical gas parameter k{sub F}a=0.816 and the spin susceptibility agree well with the results from fixed-node diffusion Monte Carlo calculations. In general, positive and negative effective ranges have opposite effects on the critical gas parameter k{sub F}a: While a positive effective range reduces the critical gas parameter, a negative effective range increases it. For attractive potential or Feshbach resonance model, the many-body upper branch exhibits an energy maximum at k{sub F}a=? with ?=1.34 from the Bethe–Goldstone ladder resummation, which is qualitatively consistent with experimental results. The many-body T-matrix has a positive-energy pole for k{sub F}a>? and it becomes impossible to distinguish the bound state and the scattering state. These positive-energy bound states become occupied and therefore the upper branch reaches an energy maximum at k{sub F}a=?. In the zero range limit, there exists a narrow window (0.86branch Fermi gas. - Highlights: • Nonperturbative interaction energy is obtained within the Bethe–Goldstone ladder resummation approach. • Positive and negative effective ranges have opposite effects on the critical gas parameter. • The upper branch Fermi gas exhibits an energy maximum and reentrant ferromagnetic transition. • The ferromagnetic phase disappears for large and negative effective ranges.

  2. Thirty-eighth Hawaii International Conference on System Sciences, January 2005, Big Island, Hawaii. c 2005 IEEE. Branching process models for the exponentially increasing portions of cascading

    E-Print Network [OSTI]

    -Watson and Markov branching processes are related to the timing of failures and this extends previous work of blackouts and offers a number of possibilities for understanding and monitoring the risk of large blackouts

  3. Dartmouth Stellar Evolution Database and the ACS Survey of Galactic Globular Clusters II. Stellar Evolution Tracks, Isochrones, Luminosity Functions, and Synthetic Horizontal-Branch Models

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Dotter, A; Chaboyer, B; Jevremovic, D; Kostov, V; Baron, E; Ferguson, J; Sarajedini, A; Anderson, J

    Web tools are also available at the home page (http://stellar.dartmouth.edu/~models/index.html). These tools allow users to create isochrones and convert them to luminosity functions or create synthetic horizontal branch models.

  4. H I observations of the asymptotic giant branch star X Herculis: Discovery of an extended circumstellar wake superposed on a compact high-velocity cloud

    E-Print Network [OSTI]

    Libert, Y.

    We report H I 21 cm line observations of the asymptotic giant branch (AGB) star X Her obtained with the Robert C. Byrd Green Bank Telescope (GBT) and the Very Large Array. We have unambiguously detected H I emission ...

  5. Measurement of zinc stable isotope ratios in biogeochemical matrices by double-spike MC-ICPMS and determination of the isotope ratio pool available for plants from soil

    E-Print Network [OSTI]

    2010-01-01

    of the isotope ratio pool available for plants from soil Timto characterize the Zn isotope pool available to plants in athe composition of the Zn pool available to the plants [21,

  6. PPPL3161 Preprint Date: February 1996, UC420, 426, 427 Global Stability Study of the Ultra Low Aspect Ratio Tokamak,

    E-Print Network [OSTI]

    Low Aspect Ratio Tokamak, Global Stability Study of the Ultra Low Aspect Ratio Tokamak, Global Stability Study of the Ultra Low Aspect Ratio Tokamak, Global Stability Study of the Ultra Low Aspect Ratio Tokamak, Global Stability Study of the Ultra Low Aspect Ratio Tokamak, ULART ULART ULART ULART ULART M

  7. PPPL-3161 -Preprint Date: February 1996, UC-420, 426, 427 Global Stability Study of the Ultra Low Aspect Ratio Tokamak,Global Stability Study of the Ultra Low Aspect Ratio Tokamak,Global Stability Study of the Ultra Low Aspect Ratio Tokamak,Global Stabili

    E-Print Network [OSTI]

    Low Aspect Ratio Tokamak,Global Stability Study of the Ultra Low Aspect Ratio Tokamak,Global Stability Study of the Ultra Low Aspect Ratio Tokamak,Global Stability Study of the Ultra Low Aspect Ratio Tokamak,Global Stability Study of the Ultra Low Aspect Ratio Tokamak, ULARTULARTULARTULARTULART M. Yamada1, A. Morita2, N

  8. Impact of picolitre droplets on superhydrophobic surfaces with ultra-low spreading ratios

    E-Print Network [OSTI]

    Brown, P.S.; Berson, A.; Talbot, E.L.; Wood, T.J.; Schofield, W.C.E.; Bain, C.D.; Badyal, J.P.S.

    2011-01-01

    :24 1 IMPACT OF PICOLITRE DROPLETS ON SUPERHYDROPHOBIC SURFACES WITH ULTRA-LOW SPREADING RATIOS P. S. Brown, A. Berson, E. L. Talbot, T. J. Wood, W. C. E. Schofield, C. D. Bain†, and J. P. S. Badyal†* Department of Chemistry Science... the dynamics of wetting to be precisely controlled. Final spreading ratios as low as 0.63 can be achieved. Comparison of the maximum spreading ratio and droplet oscillation frequencies with models described in the literature shows that both are found...

  9. The role of cellular structure on increasing the detonability limits of three-step chain-branching detonations

    SciTech Connect (OSTI)

    Short, Mark; Kiyanda, Charles B; Quirk, James J; Sharpe, Gary J

    2011-01-27

    In [1], the dynamics of a pulsating three-step chain-branching detonation were studied. The reaction model consists of, sequentially, chain-initiation, chain-branching and chain-termination steps. The chain-initiation and chain-branching steps are taken to be thermally neutral, with chemical energy release occuring in the chain-termination stage. The purpose of the present study is to examine whether cellular detonation structure can increase the value of the chain-branching cross-over temperature T{sub b} at which fully coupled detonation solutions are observed over those in 1 D. The basic concept is straightforward and has been discussed in [1] and [3]; if T{sub s} drops below T{sub b} at the lead shock, the passage of a transverse shock can increase both the lead shock temperature and the temperature behind the transverse wave back above T{sub b}, thus sustaining an unstable cellular detonation for values of T{sub b} for which a one-dimensional pulsating detonation will fail. Experiments potentially supporting this hypothesis with irregular detonations have been shown in [3] in a shock tube with acoustically absorbing walls. Removal of the transverse waves results in detonation failure, giving way to a decoupled shock-flame complex. A number of questions remain to be addressed regarding the possibility of such a mechanism, and, if so, about the precise mechanisms driving the cellular structure for large T{sub b}. For instance, one might ask what sets the cell size in a chain-branching detonation, particularly could the characteristic cell size be set by the chain-branching cross-over temperature T{sub b}: after a transverse wave shock collision, the strength of the transverse wave weakens as it propagates along the front. If the spacing between shock collisions is too large (cell size), then the transverse shocks may weaken to the extent that the lead shock temperature or that behind the transverse waves is not raised above T{sub b}, losing chemical energy to drive the front in those regions. Failure may result if less than sufficient of the lead shock be driven above n to sustain reaction. Our starting point for generating cellular solutions is as in [I], consisting of an initial ZND wave in the channel, but perturbed here by a density non-uniformity to generate a cellular structure. Exactly how far the detonability limits (value of T{sub b}) can be extended is not addressed here, as such issues relate in part to the way the cellular structure is generated [6]. Our concern here is to investigate the mechanisms of self-sustained cellular detonation for values of T{sub b} above those that lead to 1D pulsating wave failure that can be generated from the initial ZND wave. Finally, we do not consider cellular propagation driven by a process of apparent thermal ignition of hot-spots downstream that tends to appear close to the 20 detonability limit. Such events are subject to the lack of correct thermal diffusive physics in the model and thus to the form of numerical dissipation in the underlying flow algorithm.

  10. Discriminating between SUSY and Non-SUSY Higgs Sectors through the Ratio $H \\to b \\bar b / H \\to \\tau \\bar \\tau$ with a Higgs boson of 125 GeV

    E-Print Network [OSTI]

    Arganda, E; Hollik, W; Penaranda, S

    2015-01-01

    It is still an open question whether the new scalar particle discovered at the LHC with a mass of 125 GeV is the SM Higgs boson or it belongs to models of new physics with an extended Higgs sector, as the MSSM or 2HDM. The ratio of branching fractions $R$ = BR($H \\to b \\bar b$)/BR($H \\to \\tau \\bar \\tau$) of Higgs boson decays is a powerful tool in order to distinguish the MSSM Higgs sector from the SM or non-supersymmetric 2HDM. This ratio receives large renormalization-scheme independent radiative corrections in supersymmetric models at large $\\tan\\beta$, which are insensitive to the SUSY mass scale ($M_\\text{SUSY}$) and absent in the SM or 2HDM. Making use of the current LHC data and the upcoming new results on Higgs couplings to be reported by ATLAS and CMS collaborations and in a future linear collider, we develop a detailed and updated study of this ratio $R$ which improves previous analyses and sets the level of accuracy needed to discriminate between models.

  11. Mass dependence of balance energy for different N/Z ratio

    E-Print Network [OSTI]

    Aman D. Sood

    2011-09-28

    We present the study for the mass dependence of E$_{bal}$ for various N/Z ratios covering pure symmetric systems to highly neutron-rich ones.

  12. Effect of Compression Ratio and Piston Geometry on RCCI load limit

    Broader source: Energy.gov [DOE]

    Explores the effect of compression ratio and piston design on the practical load range of bio-fueled Reactivity Controlled Compression Ignition (RCCI) combustion.

  13. Modeling and Analysis of Natural Gas and Gasoline In A High Compression Ratio High Efficiency ICRE

    Broader source: Energy.gov [DOE]

    performance of a high compression ratio (32:1 to 74:1) high efficiency (50 to 60% BTE) ICRE operating on natural gas and gasoline

  14. The ACP (Advanced Computer Program) Branch bus and real-time applications of the ACP multiprocessor system

    SciTech Connect (OSTI)

    Hance, R.; Areti, H.; Atac, R.; Biel, J.; Cook, A.; Fischler, M.; Gaines, I.; Husby, D.; Nash, T.; Zmuda, T.

    1987-05-08

    The ACP Branchbus, a high speed differential bus for data movement in multiprocessing and data acquisition environments, is described. This bus was designed as the central bus in the ACP multiprocessing system. In its full implementation with 16 branches and a bus switch, it will handle data rates of 160 MByte/sec and allow reliable data transmission over inter rack distances. We also summarize applications of the ACP system in experimental data acquisition, triggering and monitoring, with special attention paid to FASTBUS environments.

  15. A Measurement of the B ---> Eta/C K Branching Fraction Using the BaBar Detector

    SciTech Connect (OSTI)

    Jackson, Frank; /Manchester U.

    2006-04-26

    The branching fraction is measured for the decay channels B{sup 0} {yields} {eta}{sub c}K{sub S}{sup 0} and B{sup +} {yields} {eta}{sub c}K{sup +} where {eta}{sub c} {yields} K{bar K}{pi}, using the BABAR detector. The {eta}{sub c} {yields} K{sub S}{sup 0}K{sup +}{pi}{sup -} and {eta}{sub c} {yields} K{sup +}K{sup -}{pi}{sup 0} decay channels are used, including non-resonant decays and possibly those through intermediate resonances.

  16. Experimental and computational results on exciton/free-carrier ratio, hot/thermalized carrier diffusion, and linear/nonlinear rate constants affecting scintillator proportionality

    SciTech Connect (OSTI)

    Williams, Richard; Grim, Joel; Li, Qi; Ucer, K. B.; Bizarri, G. A.; Kerisit, Sebastien N.; Gao, Fei; Bhattacharya, Pijush; Tupitsyn, Eugene; Rowe, Emmanuel; Buliga, Vladimir M.; Burger, Arnold

    2013-10-01

    Models of nonproportional response in scintillators have highlighted the importance of parameters such as branching ratios, carrier thermalization times, diffusion, kinetic order of quenching, associated rate constants, and radius of the electron track. For example, the fraction ?eh of excitations that are free carriers versus excitons was shown by Payne and coworkers to have strong correlation with the shape of electron energy response curves from Compton-coincidence studies. Rate constants for nonlinear quenching are implicit in almost all models of nonproportionality, and some assumption about track radius must invariably be made if one is to relate linear energy deposition dE/dx to volume-based excitation density n (eh/cm3) in terms of which the rates are defined. Diffusion, affecting time-dependent track radius and thus density of excitations, has been implicated as an important factor in nonlinear light yield. Several groups have recently highlighted diffusion of hot electrons in addition to thermalized carriers and excitons in scintillators. However, experimental determination of many of these parameters in the insulating crystals used as scintillators has seemed difficult. Subpicosecond laser techniques including interband z scan light yield, fluence-dependent decay time, and transient optical absorption are now yielding experimental values for some of the missing rates and ratios needed for modeling scintillator response. First principles calculations and Monte Carlo simulations can fill in additional parameters still unavailable from experiment. As a result, quantitative modeling of scintillator electron energy response from independently determined material parameters is becoming possible on an increasingly firmer data base. This paper describes recent laser experiments, calculations, and numerical modeling of scintillator response.

  17. Measurement of the ratio B(t to Wb)/B(t to Wq) in pp collisions at sqrt(s) = 8 TeV

    SciTech Connect (OSTI)

    Khachatryan, Vardan; et al.,

    2014-09-01

    The ratio of the top-quark branching fractions R=B(t to Wb)/B(t to Wq), where the denominator includes the sum over all down-type quarks (q = b, s, d), is measured in the t t-bar dilepton final state with proton-proton collision data at sqrt(s)=8 TeV from an integrated luminosity of 19.7 inverse femtobarns, collected with the CMS detector. In order to quantify the purity of the signal sample, the cross section is measured by fitting the observed jet multiplicity, thereby constraining the signal and background contributions. By counting the number of b jets per event, an unconstrained value of R=1.014 +/- 0.003 (stat.) +/- 0.032 (syst.) is measured, in good agreement with the standard model prediction. A lower limit R > 0.955 at the 95% confidence level is obtained after requiring R <;=1, and a lower limit on the Cabibbo-Kobayashi-Maskawa matrix element abs(V[tb]) > 0.975 is set at 95% confidence level. The result is combined with a previous CMS measurement of the t-channel single-top-quark cross section to determine the top-quark total decay width, Gamma[t]=1.36 +/- 0.02 (stat.) +0.14/-0.11 (syst.) GeV.

  18. Nucleosynthesis and mixing on the Asymptotic Giant Branch. III. Predicted and observed s-process abundances

    E-Print Network [OSTI]

    M. Busso; R. Gallino; D. L. Lambert; C. Travaglio; V. V. Smith

    2001-04-26

    We present the results of s-process nucleosynthesis calculations for AGB stars of different metallicities and initial masses. The computations were based on previously published stellar evolutionary models that account for the III dredge up phenomenon occurring late on the AGB. Neutron production is driven by the 13C(alpha,n)16O reaction during the interpulse periods in a tiny layer in radiative equilibrium at the top of the He- and C-rich shell. The s-enriched material is subsequently mixed with the envelope by the III dredge up, and the envelope composition is computed after each thermal pulse. We follow the changes in the photospheric abundance of the Ba-peak elements (heavy s, or `hs') and that of the Zr-peak ones (light s, or `ls'), whose logarithmic ratio [hs/ls] has often been adopted as an indicator of the s-process efficiency. The theoretical predictions are compared with published abundances of s elements for Galactic AGB giants of classes MS, S, SC, post-AGB supergiants, and for various classes of binary stars. The observations in general confirm the complex dependence of n captures on metallicity. They suggest that a moderate spread exists in the abundance of 13C that is burnt in different stars. Although additional observations are needed, a good understanding has been achieved of s-process operation in AGB. The detailed abundance distribution including the light elements (CNO) of a few s-enriched stars at different metallicity are examined.

  19. Condensation of refractory metals in asymptotic giant branch and other stellar environments

    SciTech Connect (OSTI)

    Schwander, D.; Berg, T.; Schönhense, G.; Ott, U.

    2014-09-20

    The condensation of material from a gas of solar composition has been extensively studied, but less so condensation in the environment of evolved stars, which has been mainly restricted to major compounds and some specific element groups such as the Rare Earth elements. Also of interest, however, are refractory metals like Mo, Ru, Os, W, Ir, and Pt, which may condense to form refractory metal nuggets (RMNs) like the ones that have been found in association with presolar graphite. We have performed calculations describing the condensation of these elements in the outflows of s-process enriched AGB stars as well as from gas enriched in r-process products. While in carbon-rich environments (C > O), the formation of carbides is expected to consume W, Mo, and V (Lodders and Fegley), the condensation sequence for the other refractory metals under these conditions does not significantly differ from the case of a cooling gas of solar composition. The composition in detail, however, is significantly different due to the completely different source composition. Condensation from an r-process enriched source differs less from the solar case. Elemental abundance ratios of the refractory metals can serve as a guide for finding candidate presolar grains among the RMNs in primitive meteorites—most of which have a solar system origin—for confirmation by isotopic analysis. We apply our calculations to the case of the four RMNs found by Croat et al., which may very well be presolar.

  20. Rapidity dependence of the photon to pion production ratio in high energy collisions

    E-Print Network [OSTI]

    Jamal Jalilian-Marian

    2007-03-22

    We investigate rapidity dependence of the ratio of photon and pion production cross sections in high energy proton (deuteron) - nucleus collisions at RHIC and LHC. This ratio, and its rapidity dependence can be a sensitive probe of high density QCD (Color Glass Condensate) dynamics and shed further light on the role of saturation physics at RHIC and LHC.

  1. Free Boundary, High Beta Equilibrium in a Large Aspect Ratio Tokamak with Nearly

    E-Print Network [OSTI]

    Free Boundary, High Beta Equilibrium in a Large Aspect Ratio Tokamak with Nearly Circular Plasma­boundary, high­beta equi­ libria in large aspect ratio tokamaks with a nearly circular plasma boundary in tokamaks for the purpose of developing an economic fusion reactor. It has long been recognized

  2. Environmental control on eastern broadleaf forest species' leaf wax distributions and D/H ratios

    E-Print Network [OSTI]

    Environmental control on eastern broadleaf forest species' leaf wax distributions and D/H ratios the degree to which an individual plant's leaf waxes D/H ratios are affected by these parameters remains- sitions of leaf wax n-alkanes, stem and surface waters were analyzed and compared against high

  3. Environmental control on eastern broadleaf forest species' leaf wax distributions and D/H ratios

    E-Print Network [OSTI]

    Tipple, Brett

    Environmental control on eastern broadleaf forest species' leaf wax distributions and D/H ratios plant's leaf waxes D/H ratios are affected by these parameters remains in question. Understanding Coast of the US, from Florida to Maine. Hydrogen isotopic compo- sitions of leaf wax n-alkanes, stem

  4. Power and Effective Study Size Based on Approximations to the Expected Likelihood Ratio

    E-Print Network [OSTI]

    Washington at Seattle, University of

    Power and Effective Study Size Based on Approximations to the Expected Likelihood Ratio Test statistical power and precision of heritability estimates can be difficult particularly in complex pedigrees. Previous work focused on the power to detect heritability by using the expectation of the likelihood ratio

  5. On the Low Energy Decrease in Galactic Cosmic Ray Secondary/Primary Ratios

    E-Print Network [OSTI]

    Davis, Andrew J.

    On the Low Energy Decrease in Galactic Cosmic Ray Secondary/Primary Ratios A.J. Davis1 , R for the low energy decrease in esc and attempt to fit the combined, high-resolution measurements of secondary/primary/nucleon). The energy dependence of esc´Eµ is a free parameter in the model, and GCR secondary/primary ratios and spec

  6. Raman scattering method and apparatus for measuring isotope ratios and isotopic abundances

    DOE Patents [OSTI]

    Harney, Robert C. (5665 Charlotte Way, No. 80, Livermore, CA 94550); Bloom, Stewart D. (141 Via Serena, Alamo, CA 94507)

    1978-01-01

    Raman scattering is used to measure isotope ratios and/or isotopic abundances. A beam of quasi-monochromatic photons is directed onto the sample to be analyzed, and the resulting Raman-scattered photons are detected and counted for each isotopic species of interest. These photon counts are treated mathematically to yield the desired isotope ratios or isotopic abundances.

  7. Non-Coherent Amplify-and-Forward Generalized Likelihood Ratio Test Receiver

    E-Print Network [OSTI]

    Non-Coherent Amplify-and-Forward Generalized Likelihood Ratio Test Receiver Michael R. Souryal for the relay channel and evaluates its diversity performance for Rayleigh fading channels. We use the generalized likelihood ratio test to obtain the decision rule in closed form, independent of the fading

  8. UDC 622.276 A NEW APPROACH CALCULATE OIL-GAS RATIO

    E-Print Network [OSTI]

    Fernandez, Thomas

    UDC 622.276 A NEW APPROACH CALCULATE OIL-GAS RATIO FOR GAS CONDENSATE AND VOLATILE OIL RESERVOIRS. In this work, we develop a new approach to calculate oil-gas ratio (Rv) by matching PVT experimental data laboratory analysis of eight gas condensate and five volatile oil fluid samples; selected under a wide range

  9. SUPPLEMENTAL TEXT Supplement 1: Derivation of the relation between D-A stoichiometry and ratio S

    E-Print Network [OSTI]

    Michalet, Xavier

    1 SUPPLEMENTAL TEXT Supplement 1: Derivation of the relation between D-A stoichiometry and ratio molecule. Supplement 2: Relation of raw PRE to accurate-E: derivation Crosstalk-uncorrected proximity ratio 1 1 1 raw PR raw PR l d E E l E - + + - = - + - - (S9) #12;3 SUPPLEMENTAL FIGURE LEGENDS Fig. S1

  10. DATABASE LIKELIHOOD RATIOS AND FAMILIAL DNA KLAAS SLOOTEN AND RONALD MEESTER

    E-Print Network [OSTI]

    Meester, Ronald

    DATABASE LIKELIHOOD RATIOS AND FAMILIAL DNA SEARCHING KLAAS SLOOTEN AND RONALD MEESTER Abstract. Familial Searching is the process of searching in a DNA database for relatives of a given individual ratio, which is in this context called a Kinship Index. Suppose that the database contains, for a given

  11. A generalized likelihood ratio technique for automated analysis of bobbin coil eddy current dataq

    E-Print Network [OSTI]

    Polikar, Robi

    is positioned in a defect-free region of the tube, the differential im- pedance of the two coils is zeroA generalized likelihood ratio technique for automated analysis of bobbin coil eddy current dataq M presents a generalized likelihood ratio technique for detection of defect locations from bobbin coil eddy

  12. High-precision optical measurements of 13 isotope ratios in organic compounds at

    E-Print Network [OSTI]

    Zare, Richard N.

    range with an average precision of 0.95 and 0.67 for ethane and propane, respec- tively. The calibrated accuracy for methane, ethane, and propane is within 3 of the values determined using isotope ratio mass-down spectroscopy combustion isotopic ratio It is often taught in beginning chemistry classes that the atoms

  13. Aspect Ratio Dependence of Electromechanical Coupling Coefficient k31 of Lateral-Excitation Piezoelectric Vibrator

    E-Print Network [OSTI]

    Cao, Wenwu

    Aspect Ratio Dependence of Electromechanical Coupling Coefficient k31 of Lateral analyszed. As a result, a formula for the electromechanical coupling coefficient k31 was derived-mode piezoelectric vibrator with an arbitrary aspect ratio. [DOI: 10.1143/JJAP.46.4459] KEYWORDS: electromechanical

  14. Group Ratio Round-Robin: O(1) Proportional Share Scheduling for Uniprocessor and Multiprocessor Systems

    E-Print Network [OSTI]

    Group Ratio Round-Robin: O(1) Proportional Share Scheduling for Uniprocessor and Multiprocessor of Computer Science Columbia University Technical Report CUCS-028-04 July 2004Abstract Proportional share. We present Group Ratio Round-Robin (GR3 ), the first proportional share scheduler that combines accu

  15. Author's personal copy Imaging of Vp, Vs, and Poisson's ratio anomalies beneath

    E-Print Network [OSTI]

    Seno, Tetsuzo

    and Kirishima. The subducting Philippine Sea slab is imaged generally as a high-velocity anomaly down to a depth's ratio could be caused by fluid-filled cracks induced by dehydration from the Philippine Sea slab; Shikoku; Philippine Sea; Seismic tomography; Poisson's ratio; Serpentinized forearc mantle; Low

  16. Subduction Factory 5: Unusually low Poisson's ratios in subduction zones from elastic anisotropy of peridotite

    E-Print Network [OSTI]

    Hacker, Bradley R.

    of peridotite Bradley R. Hacker1 and Geoffrey A. Abers2 Received 26 January 2012; revised 30 April 2012: Hacker, B. R., and G. A. Abers (2012), Subduction Factory 5: Unusually low Poisson's ratios in subduction.76­1.78 [Hacker and Abers, 2004] at 600­1400 C and 2­3 GPa. These observed ratios are also significantly lower

  17. Do humans adjust offspring sex according to the local operational sex ratio?

    E-Print Network [OSTI]

    Helle, Samuli

    Do humans adjust offspring sex according to the local operational sex ratio? Samuli Helle, 1 Pekka-Zürich), Zürich, Switzerland ABSTRACT Question: Do humans overproduce the rarer sex in response to skews in the local operational sex ratio (OSR)? And how should one define the OSR in humans? Hypothesis: We predicted

  18. ORIGINAL PAPER Sex ratio varies with egg investment in the red-necked

    E-Print Network [OSTI]

    ORIGINAL PAPER Sex ratio varies with egg investment in the red-necked phalarope (Phalaropus lobatus Abstract Fisher's sex ratio theory predicts that on average parents should allocate resources equally of the sex with greater variation in fitness. We tested theoretical predictions in the red-necked phalarope

  19. Cues to the sex ratio of the local population influence women's preferences for facial symmetry

    E-Print Network [OSTI]

    Little, Tony

    Cues to the sex ratio of the local population influence women's preferences for facial symmetry-00762 Keywords: attraction dominance fluctuating asymmetry mate preference sex ratio within-sex competition intensifies within-sex competition. In two experiments, we tested for analogous effects in humans

  20. Effective heritability of targets of sex-ratio selection under environmental sex determination

    E-Print Network [OSTI]

    Janzen, Fredric

    Effective heritability of targets of sex-ratio selection under environmental sex determination S. E, 2008; Robinson et al., 2009). In many organisms, sex of the offspring is determined by environmental-by-environment interaction; nest-site choice; phenotypic plasticity; sex ratio; temperature-dependent sex determination