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Sample records for goodland ks westar

  1. Category:Goodland, KS | Open Energy Information

    Open Energy Info (EERE)

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  2. Westar Energy, Inc. Smart Grid Project | 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:QA J-E-1 SECTION J APPENDIX ECoop IncIowa (Utility Company)Idaho)VosslohWest Plains Electric Coop IncWestar Energy,

  3. Workplace Charging Challenge Partner: Westar Energy | 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 DeliciousMathematics And Statistics » USAJobs SearchAMERICA'SEnergyofThe HartfordUnum GroupDepartmentWestar Energy

  4. Goodland I Wind Farm | 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:QA J-E-1 SECTION J APPENDIXsource History View New Pages RecentPlantMagma Energy GroupDOESwitzerland)

  5. 1 KS.Inglett_CV KANIKA SHARMA INGLETT

    E-Print Network [OSTI]

    Balser, Teri C.

    ; bioremediation and biodegradation of environmental pollutants EDUCATION Ph.D., Soil and Water Science with minor technology. TEACHING Soil and Water Science Department, University of Florida Instructor, Bioremediation1 KS.Inglett_CV KANIKA SHARMA INGLETT Soil and Water Science Department, Ph: (352) 392-1804 ext 223

  6. Million Atom KS-DFT with CP2K 

    E-Print Network [OSTI]

    Bethune, Iain; Carter, Adam; Guo, Xu; Korosoglou, Paschalis

    2011-01-01

    CP2K is a powerful materials science and computational chemistry code and is widely used by research groups across Europe and beyond. The recent addition of a linear scaling KS-DFT method within the code has made it possible to simulate systems...

  7. Westar Energy Inc | 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| Open Energy Information Serbia-EnhancingEtGeorgia: Energy ResourcesTurin, New York:

  8. City of Goodland, Kansas (Utility Company) | 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:QA J-E-1 SECTION J APPENDIX E LISTStar Energy LLCLtdEllsworth, Iowa (UtilityCollinsKansasGirard,Goldthwaite,

  9. Effects of finite volume on the KL – KS mass difference

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

    Christ, N.? H.; Feng, X.; Martinelli, G.; Sachrajda, C.? T.

    2015-06-01

    Phenomena that involve two or more on-shell particles are particularly sensitive to the effects of finite volume and require special treatment when computed using lattice QCD. In this paper we generalize the results of Lüscher and Lellouch and Lüscher, which determine the leading-order effects of finite volume on the two-particle spectrum and two-particle decay amplitudes to determine the finite-volume effects in the second-order mixing of the K? and K?? states. We extend the methods of Kim, Sachrajda, and Sharpe to provide a direct, uniform treatment of these three, related, finite-volume corrections. In particular, the leading, finite-volume corrections to the KLmore »– KS mass difference ?MK and the CP-violating parameter ?K are determined, including the potentially large effects which can arise from the near degeneracy of the kaon mass and the energy of a finite-volume, two-pion state.« less

  10. Study of Penguin Pollution in the B^0 -> J/psi K_S Decay

    E-Print Network [OSTI]

    Satoshi Mishima

    2007-03-18

    We study the penguin pollution in the B^0 -> J/psi K_S decay up to leading power in 1/m_b and to next-to-leading order in \\alpha_s, m_b being the b quark mass and \\alpha_s the strong coupling constant. The deviation \\Delta S_{J/psi K_S} of the mixing-induced CP asymmetry from sin(2\\phi_1) and the direct CP asymmetry A_{J/psi K_S} are both found to be of O(10^{-3}) in a formalism that combines the QCD-improved factorization and perturbative QCD approaches.

  11. Search for Lepton Flavor Violating Decays tau--->l-Ks0 with the BABAR Experiment

    E-Print Network [OSTI]

    Fisher, Peter H.

    A search for the lepton flavor violating decays tau--->l-KS0 (l=e or mu) has been performed using a data sample corresponding to an integrated luminosity of 469??fb[superscript -1], collected with the BABAR detector at the ...

  12. Penguin pollution in the B^0 -> J/psi K_S decay

    E-Print Network [OSTI]

    Hsiang-nan Li; Satoshi Mishima

    2007-03-02

    We present the most complete analysis of the penguin correction to the extraction of the standard-model parameter sin(2\\phi_1) from the B^0 -> J/psi K_S decay up to leading power in 1/m_b and to next-to-leading order in \\alpha_s, \\phi_1 being the weak phase, m_b the b quark mass, and \\alpha_s the strong coupling constant. The deviation \\Delta S_{J/psi K_S} of the mixing-induced CP asymmetry from sin(2\\phi_1) and the direct CP asymmetry A_{J/psi K_S} are both found to be of O(10^{-3}) in a formalism that combines the QCD-improved factorization and perturbative QCD approaches. The above results, different from those of O(10^{-4}) and of O(10^{-2}) obtained in the previous calculations, provide an important standard-model reference for verifying new physics from the B^0 -> J/psi K_S data.

  13. Optimal Supplier Choice with Discounting B. Goldengorin, J. Keane, V. Kuzmenko & M. K-S. Tso

    E-Print Network [OSTI]

    Sidorov, Nikita

    Optimal Supplier Choice with Discounting B. Goldengorin, J. Keane, V. Kuzmenko & M. K-S. Tso First of Mathematics, The University of Manchester #12;Optimal supplier choice with discounting B Goldengorin, J. Keane suppliers operate discount schedules based on total business value. We formulate the buyers's decision

  14. Observation of B -> K-S(0)pi(+)pi(-) and evidence for B -> K-*+/-pi(-/+)

    E-Print Network [OSTI]

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

    2002-12-01

    We report on a search for charmless hadronic B decays to the three-body final states K(S)(0)h(+)pi(-), K(+)h(-)pi(0), K(S)(0)h(+)pi(0) (h(+/-) denotes a charged pion or kaon), and their charge conjugates, using 13.5 fb(-1) ...

  15. J- and Ks-band Galaxy Counts and Color Distributions in the AKARI North Ecliptic Pole Field

    E-Print Network [OSTI]

    Koji Imai; Hideo Matsuhara; Shinki Oyabu; Takehiko Wada; Toshinobu Takagi; Naofumi Fujishiro; Hitoshi Hanami; Chris P. Pearson

    2007-02-09

    We present the J- and Ks-band galaxy counts and galaxy colors covering 750 square arcminutes in the deep AKARI North Ecliptic Pole (NEP) field, using the FLoridA Multi-object Imaging Near-ir Grism Observational Spectrometer (FLAMINGOS) on the Kitt Peak National Observatory (KPNO) 2.1m telescope. The limiting magnitudes with a signal-to-noise ratio of three in the deepest regions are 21.85 and 20.15 in the J- and Ks-bands respectively in the Vega magnitude system. The J- and Ks-band galaxy counts in the AKARI NEP field are broadly in good agreement with those of other results in the literature, however we find some indication of a change in the galaxy number count slope at J~19.5 and over the magnitude range 18.0 < Ks < 19.5. We interpret this feature as a change in the dominant population at these magnitudes because we also find an associated change in the B - Ks color distribution at these magnitudes where the number of blue samples in the magnitude range 18.5 < Ks < 19.5 is significantly larger than that of Ks < 17.5.

  16. INTEGRAL observation of the X-ray burster KS 1741-293

    E-Print Network [OSTI]

    G. De Cesare; A. Bazzano; G. Stratta; M. Del Santo; A. Tarana; P. Ubertini

    2005-11-30

    KS 1741-293 was firstly detected in 1989 with the X-ray wide field camera TTM (3-10 keV) on board of the Rontgen-Kvant-Mir observatory. During these observations this source exhibited two X-ray bursts allowing to identify it as a neutron star in a Low mass X-ray Binary. During the BeppoSAX/WFC monitoring of the Galactic Centre Region, KS 1741-293 was also reported at a flux level of 6 mCrab in the 2-9 keV and 25 mCrab in the 9-25 keV energy range. Thanks to the deep and regular INTEGRAL observation of the Galactic Centre region, KS 1741-293 has been observed by the X-ray monitor JEM-X and the imager IBIS in a wide energy range, giving for the first time relevant information on its high energy behaviour. Furthermore, two X-ray bursts have been detected by JEM-X. We report on IBIS and JEM-X data analysis in terms of flux monitoring, spectral proprieties and bursts detection. The data reduction has been done with the most recent release of the standard analysis software (OSA 5.0).

  17. Observation of a narrow structure in 1 H( ? , KS0 ) X via interference with ? -meson production

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

    Amaryan, M. J.; Gavalian, G.; Nepali, C.; Polyakov, M. V.; Azimov, Ya.; Briscoe, W. J.; Dodge, G. E.; Hyde, C. E.; Klein, F.; Kuznetsov, V.; et al

    2012-03-01

    We report observation of a narrow peak structure at ?1.54 GeV with a Gaussian width ? = 6 MeV in the missing mass of KS in the reaction ? + p ? pKSKL. The observed structure may be due to the interference between a strange (or antistrange) baryon resonance in the pKL system and the ?(KSKL) photoproduction leading to the same final state. The statistical significance of the observed excess of events estimated as the log-likelihood ratio of the resonant signal + background hypothesis and the ?-production-based background-only hypothesis corresponds to 5.3?.

  18. Study of KS semileptonic decays and CPT test with the KLOE detector

    E-Print Network [OSTI]

    Daria Kami?ska; for the KLOE-2 Collaboration

    2015-09-03

    Study of semileptonic decays of neutral kaons allows to perform a test of discrete symmetries, as well as basic principles of the Standard Model. In this paper a general review on dependency between charge asymmetry constructed for semileptonic decays of short- and long-lived kaons and CPT symmetry is given. The current status of determination of charge asymmetry for short-lived kaon, obtained by reconstruction of about 10^5 KS -> pen decays collected at DAFNE with the KLOE detector is also reviewed.

  19. DOE - Office of Legacy Management -- Spencer Chemical Co - KS 0-01

    Office of Legacy Management (LM)

    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 NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbins and Myers Co - OH 51SavannahMillKS 0-01 FUSRAP

  20. Control of Well KS-8 in the Kilauea Lower East Rift Zone | Open Energy

    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:QA J-E-1 SECTIONRobertsdale, Alabama (Utility Company)| Open(Evans, EtInformation Control of Well KS-8 in the

  1. Detection of Ks-excess stars in the 14Myr open cluster NGC4755

    E-Print Network [OSTI]

    Bonatto, C; Ortolani, S; Barbuy, B

    2006-01-01

    We derive the structure, distribution of MS and PMS stars and dynamical state of the young open cluster NGC 4755. We explore the possibility that, at the cluster age, some MS and PMS stars still present infrared excesses related to dust envelopes and proto-planetary discs. The radial density profile follows King's law with a core radius $\\rm\\rc=0.7\\pm0.1 pc$ and a limiting radius $\\rm\\rl=6.9\\pm0.1 pc$; the cluster age is $\\rm14\\pm2 Myr$. Field-star decontamination reveals a low-MS limit at $\\rm\\approx1.4 \\ms$. The core MF ($\\chi=0.94\\pm0.16$) is flatter than the halo's ($\\chi=1.58\\pm0.11$). NGC 4755 contains $\\rm\\sim285$ candidate PMS stars of age $\\rm\\sim1 - 15 Myr$, and a few evolved stars. The mass locked up in PMS, MS and evolved stars amounts to $\\rm\\sim1150 \\ms$. Proper motions show that \\ks-excess MS and PMS stars are cluster members. \\ks-excess fractions in PMS and MS stars are $\\rm5.4\\pm2.1%$ and $\\rm3.9\\pm1.5%$ respectively, consistent with the cluster age. The core is deficient in PMS stars, as com...

  2. Optical observations of Be/X-ray transient system KS 1947+300

    E-Print Network [OSTI]

    U. Kiziloglu; A. Baykal; N. Kiziloglu

    2006-08-05

    ROTSE-IIId observations of the Be/X-ray transient system KS 1947+300 obtained between September 2004 and December 2005 make it possible to study the correlation between optical and X-ray activity. The optical outburst of 0.1 mag was accompanied by an increase in X-ray flux in 2004 observations. Strong correlation between the optical and X-ray light curves suggests that neutron star directly accretes from the outflowing material of Be star. The nearly zero time lag between X-ray and optical light curves suggests a heating of the disk of Be star by X-rays. No optical brightening and X-ray enhancement was seen in 2005 observations. There is no indication of the orbital modulation in the optical light curve.

  3. Recent aeolian dune change on Mars M.C. Bourke a,b,, K.S. Edgett c

    E-Print Network [OSTI]

    Bourke, Mary C.

    Recent aeolian dune change on Mars M.C. Bourke a,b,, K.S. Edgett c , B.A. Cantor c a Planetary 2007 Abstract Previous comparisons of Martian aeolian dunes in satellite images have not detected any change in dune form or position. Here, we show dome dunes in the north polar region that shrank

  4. Detection of Ks-band Thermal Emission from WASP-3b

    E-Print Network [OSTI]

    Zhao, Ming; Barman, Travis; Hinkley, Sasha; Swain, Mark R; Wright, Jason; Monnier, John D

    2012-01-01

    We report the detection of thermal emission from the hot Jupiter WASP-3b in the KS band, using a newly developed guiding scheme for the WIRC instrument at the Palomar Hale 200in telescope. Our new guiding scheme has improved the telescope guiding precision by a factor of ~5-7, significantly reducing the correlated systematics in the measured light curves. This results in the detection of a secondary eclipse with depth of 0.181%\\pm0.020% (9-{\\sigma}) - a significant improvement in WIRC's photometric precision and a demonstration of the capability of Palomar/WIRC to produce high quality measurements of exoplanetary atmospheres. Our measured eclipse depth cannot be explained by model atmospheres with heat redistribution but favor a pure radiative equilibrium case with no redistribution across the surface of the planet. Our measurement also gives an eclipse phase center of 0.5045\\pm0.0020, corresponding to an ecos{\\omega} of 0.0070\\pm0.0032. This result is consistent with a circular orbit, although it also sugges...

  5. Isospin analysis of Theta+ production forbids gamma p ---> Theta+ K(s) and allows gamma n ---> Theta+ K-.

    E-Print Network [OSTI]

    Karliner, Marek; Lipkin, Harry J

    ar X iv :h ep -p h/ 05 06 08 4v 3 1 6 Ju n 20 05 Cavendish-HEP-05/09 TAUP 2807/05 ANL-HEP-PR-05-47 Isospin Analysis of ?+ production forbids ?p ? ?+ Ks and allows ?n ? ?+ K? Marek Karliner a,b? and Harry J. Lipkin b,c† a Cavendish Laboratory... +Ks n|T † |K+K?p? ?K+K?p|T |?p? Im ?K+K?n| T |?n? = ? ?K+K?n| T † |K+K?n? ?K+K?n| T |?n? (5) We now see that the transition matrix ?K+Ksn| T |?p? is proportional to the transition matrix ?K+Ksn|T † |K+K?p?, where the ?(1520) can appear as a resonance...

  6. Observation of a narrow structure in 1H(?,KS0)X via interference with phi-meson production

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

    Amaryan, M J; Nepali, C; Polyakov, M V; Azimov, Ya; Briscoe, W J; Dodge, G E; Hyde, C E; Klein, F; Kuznetsov, V; Strakovsky, I

    2012-03-21

    We report observation of a narrow peak structure at ?1.54 GeV with a Gaussian width ? = 6 MeV in the missing mass of KS in the reaction ? + p ? pKSKL. The observed structure may be due to the interference between a strange (or antistrange) baryon resonance in the pKL system and the ?(KSKL) photoproduction leading to the same final state. The statistical significance of the observed excess of events estimated as the log-likelihood ratio of the resonant signal + background hypothesis and the ?-production-based background-only hypothesis corresponds to 5.3?.

  7. Inclusive production of $\\Lambda$, $K^0_s$ and exotic narrow resonances for systems $K_s^0 p$, $K_s^0 \\Lambda$, $\\Lambda p$ from p+propane interactions at 10 GeV/c

    E-Print Network [OSTI]

    Aslanyan, P Z

    2005-01-01

    Experimental data from the 2m propane bubble chamber for production of $\\Lambda$, $K^0_s$ have been used to search of exotic baryon states, in the $K_s^0 p$, $K_s^0 \\Lambda$ and $\\Lambda p$ decay mode for the reaction p+propane at 10 GeV/c. The estimation of experimental inclusive cross sections for $\\Lambda$ and $K^0_s$ production in the p$^{12}C$ collision is equal to $\\sigma_{\\Lambda}$= 13.3$\\pm$1.7 mb and $\\sigma_{K^0_s}$= 3.8$\\pm$0.6 mb, respectively. The measured $\\Lambda /\\pi^+$ ratio from pC reaction is equal to (5.3$\\pm0.8)*10^{-2}$. The experimental $\\Lambda /\\pi^+$ ratio from the pC reaction is approximately two times larger than the $\\Lambda /\\pi^+$ ratio simulated by FRITIOF model from the pC reaction. The invariant mass spectrum $\\Lambda K^0_s$ registered narrow peaks in regions of 1750 and 1795 MeV/$c^2$. The statistical significance of these peaks has been estimated as 5.6 and 3.3 S.D., respectively. These would be candidates for the $N^0$ or the $\\Xi^0$ pentaquark states. The $pK^0_s$ invaria...

  8. Inclusive production of $?$, $K^0_s$ and exotic narrow resonances for systems $K_s^0 p$, $K_s^0 ?$, $?p$ from p+propane interactions at 10 GeV/c

    E-Print Network [OSTI]

    P. Zh. Aslanyan

    2005-11-09

    Experimental data from the 2m propane bubble chamber for production of $\\Lambda$, $K^0_s$ have been used to search of exotic baryon states, in the $K_s^0 p$, $K_s^0 \\Lambda$ and $\\Lambda p$ decay mode for the reaction p+propane at 10 GeV/c. The estimation of experimental inclusive cross sections for $\\Lambda$ and $K^0_s$ production in the p$^{12}C$ collision is equal to $\\sigma_{\\Lambda}$= 13.3$\\pm$1.7 mb and $\\sigma_{K^0_s}$= 3.8$\\pm$0.6 mb, respectively. The measured $\\Lambda /\\pi^+$ ratio from pC reaction is equal to (5.3$\\pm0.8)*10^{-2}$. The experimental $\\Lambda /\\pi^+$ ratio from the pC reaction is approximately two times larger than the $\\Lambda /\\pi^+$ ratio simulated by FRITIOF model from the pC reaction. The invariant mass spectrum $\\Lambda K^0_s$ registered narrow peaks in regions of 1750 and 1795 MeV/$c^2$. The statistical significance of these peaks has been estimated as 5.6 and 3.3 S.D., respectively. These would be candidates for the $N^0$ or the $\\Xi^0$ pentaquark states. The $pK^0_s$ invariant mass spectrum shows resonant structures with $M_{K_s^0 p}$=1540, 1613, 1821 MeV/$c^2$. The statistical significance of these peaks have been estimated as 5.5,4.8 and 5.0 s.d., respectively. The invariant mass spectrum S=-1 $\\Lambda p$ observed a narrow peaks at 2100, 2175,2285 and 2353 MeV/$c^2$. Their excess above background by the second method is 6.9, 4.9, 3.8 and 2.9 S.D., respectively.

  9. First measurement of ?? with a model-independent Dalitz plot analysis of B±?DK±, D?KS????? decay

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

    Aihara, H.; Arinstein, K.; Asner, D. M.; Aulchenko, V.; Aushev, T.; Bakich, A. M.; Belous, K.; Bhuyan, B.; Bischofberger, M.; Bondar, A.; et al

    2012-06-26

    We present the first measurement of the angle ?? of the unitarity triangle using a model-independent Dalitz plot analysis of B±?DK±, D?KS????? decays. The method uses, as input, measurements of the strong phase of the D?K?S???? amplitude from the CLEO Collaboration. The result is based on the full data set of 772×106 BB¯¯¯ pairs collected by the Belle experiment at the ?(4S) resonance. We obtain ??=(77.3+15.1–14.9±4.1±4.3)° and the suppressed amplitude ratio rB=0.145±0.030±0.010±0.011. Here the first error is statistical, the second is the experimental systematic uncertainty, and the third is the error due to the precision of the strong-phase parameters obtainedmore »by CLEO.« less

  10. First measurement of ?? with a model-independent Dalitz plot analysis of B±?DK±, D?KS????? decay

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

    Aihara, H.; Arinstein, K.; Asner, D. M.; Aulchenko, V.; Aushev, T.; Bakich, A. M.; Belous, K.; Bhuyan, B.; Bischofberger, M.; Bondar, A.; Bonvicini, G.; Bozek, A.; Bra?ko, M.; Browder, T. E.; Chang, M.-C.; Chang, P.; Cheon, B. G.; Chilikin, K.; Chistov, R.; Cho, K.; Choi, Y.; Dalseno, J.; Doležal, Z.; Drutskoy, A.; Eidelman, S.; Epifanov, D.; Fast, J. E.; Feindt, M.; Gaur, V.; Gabyshev, N.; Garmash, A.; Goh, Y. M.; Golob, B.; Haba, J.; Hayashii, H.; Horii, Y.; Hoshi, Y.; Hou, W.-S.; Hsiung, Y. B.; Hyun, H. J.; Iijima, T.; Ishikawa, A.; Itoh, R.; Iwabuchi, M.; Julius, T.; Kang, J. H.; Kawasaki, T.; Kiesling, C.; Kim, H. J.; Kim, H. O.; Kim, J. B.; Kim, J. H.; Kim, K. T.; Kim, M. J.; Kim, Y. J.; Kinoshita, K.; Ko, B. R.; Koblitz, S.; Kodyš, P.; Korpar, S.; Križan, P.; Krokovny, P.; Kronenbitter, B.; Kuhr, T.; Kumita, T.; Kuzmin, A.; Kwon, Y.-J.; Lee, S.-H.; Li, J.; Li, Y.; Libby, J.; Liu, C.; Liu, Y.; Liu, Z. Q.; Liventsev, D.; Louvot, R.; Matvienko, D.; Miyabayashi, K.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Moll, A.; Mori, T.; Muramatsu, N.; Nagasaka, Y.; Nakano, E.; Nakao, M.; Natkaniec, Z.; Nishida, S.; Nitoh, O.; Ogawa, S.; Ohshima, T.; Okuno, S.; Olsen, S. L.; Pakhlova, G.; Park, C. W.; Park, H.; Park, H. K.; Park, K. S.; Pedlar, T. K.; Pestotnik, R.; Petri?, M.; Piilonen, L. E.; Poluektov, A.; Prothmann, K.; Ritter, M.; Röhrken, M.; Rozanska, M.; Ryu, S.; Sahoo, H.; Sakai, Y.; Sanuki, T.; Sato, Y.; Schneider, O.; Schwanda, C.; Schwartz, A. J.; Senyo, K.; Seon, O.; Sevior, M. E.; Shapkin, M.; Shibata, T.-A.; Shiu, J.-G.; Shwartz, B.; Sibidanov, A.; Simon, F.; Singh, J. B.; Smerkol, P.; Sohn, Y.-S.; Sokolov, A.; Solovieva, E.; Stani?, S.; Stari?, M.; Sumisawa, K.; Sumiyoshi, T.; Tatishvili, G.; Trabelsi, K.; Uchida, M.; Uehara, S.; Unno, Y.; Uno, S.; Urquijo, P.; Vanhoefer, P.; Varner, G.; Varvell, K. E.; Vinokurova, A.; Vorobyev, V.; Wang, C. H.; Wang, M.-Z.; Wang, P.; Watanabe, Y.; Williams, K. M.; Won, E.; Yabsley, B. D.; Yamamoto, H.; Yamaoka, J.; Yamashita, Y.; Yuan, C. Z.; Zhang, Z. P.; Zhilich, V.; Zhulanov, V.; Zupanc, A.

    2012-06-01

    We present the first measurement of the angle ?? of the unitarity triangle using a model-independent Dalitz plot analysis of B±?DK±, D?KS????? decays. The method uses, as input, measurements of the strong phase of the D?K?S???? amplitude from the CLEO Collaboration. The result is based on the full data set of 772×106 BB¯¯¯ pairs collected by the Belle experiment at the ?(4S) resonance. We obtain ??=(77.3+15.1–14.9±4.1±4.3)° and the suppressed amplitude ratio rB=0.145±0.030±0.010±0.011. Here the first error is statistical, the second is the experimental systematic uncertainty, and the third is the error due to the precision of the strong-phase parameters obtained by CLEO.

  11. CMR at 3 Tesla using a large flexible surface coil: initial experience KS Nayak, P Varadarajan, C-Y Liu, S Valencerina, GM Pohost

    E-Print Network [OSTI]

    Southern California, University of

    CMR at 3 Tesla using a large flexible surface coil: initial experience KS Nayak, P Varadarajan, C obtained with a flexible receiver coil that generates LV function studies at 3T of diagnostic quality that wraps around the left chest for CMR imaging of the heart at 3 Tesla. Methods: Experiments were performed

  12. CONTINUED COOLING OF THE CRUST IN THE NEUTRON STAR LOW-MASS X-RAY BINARY KS 1731-260

    SciTech Connect (OSTI)

    Cackett, Edward M.; Miller, Jon M.; Brown, Edward F.; Cumming, Andrew; Degenaar, Nathalie; Wijnands, Rudy

    2010-10-20

    Some neutron star low-mass X-ray binaries have very long outbursts (lasting several years) which can generate a significant amount of heat in the neutron star crust. After the system has returned to quiescence, the crust then thermally relaxes. This provides a rare opportunity to study the thermal properties of neutron star crusts, putting constraints on the thermal conductivity and hence the structure and composition of the crust. KS 1731-260 is one of only four systems where this crustal cooling has been observed. Here, we present a new Chandra observation of this source approximately eight years after the end of the last outburst and four years since the last observation. We find that the source has continued to cool, with the cooling curve displaying a simple power-law decay. This suggests that the crust has not fully thermally relaxed yet and may continue to cool further. A simple power-law decay is in contrast to theoretical cooling models of the crust, which predict that the crust should now have cooled to the same temperature as the neutron star core.

  13. Print http://us.mg4.mail.yahoo.comfneo/launch?.rand=deOsgk04ks40i Subject: Re: [s-w-h] Solar verses wind efficiency

    E-Print Network [OSTI]

    . A single nominal 100 watt solar panel for 4 sun hours/day would yield -4 kWh/day or 12 kWh/month. At $2Print http://us.mg4.mail.yahoo.comfneo/launch?.rand=deOsgk04ks40i Subject: Re: [s-w-h] Solar verses wind efficiency From: David Raine (dave@dyocore.com) To: wind4energy@yahoo.com; Date: Thursday

  14. Print http://us.mg4.mail.yahoo.com/neo/launch?.rand=deOsgk04ks40i Subject: RE: [s-w-h] b Solar verses wind efficiency

    E-Print Network [OSTI]

    .yahoo.com/neo/launch?.rand=deOsgk04ks40i Subject: RE: [s-w-h] b Solar verses wind efficiency From: Michael Klemen (wind4energy;Print http://us.rng4.mail.yahoo.comlneo/launch?.rand=deOsgko4ks4 energy in the wind is proportional://www.ndsu.edu/ndsu/klemen/Perfect_Turbine.htm You can see that for an ideal real life wind turbine ("good turbine") the increase in energy

  15. The Mass and Radius of the Neutron Star in the Bulge Low-Mass X-ray Binary KS 1731-260

    E-Print Network [OSTI]

    Feryal Ozel; Andrew Gould; Tolga Guver

    2011-04-26

    Measurements of neutron star masses and radii are instrumental for determining the equation of state of their interiors, understanding the dividing line between neutron stars and black holes, and for obtaining accurate statistics of source populations in the Galaxy. We report here on the measurement of the mass and radius of the neutron star in the low-mass X-ray binary KS 1731-260. The analysis of the spectroscopic data on multiple thermonuclear bursts yields well-constrained values for the apparent angular area and the Eddington flux of the source, both of which depend in a distinct way on the mass and radius of the neutron star. The binary KS 1731-260 is in the direction of the Galactic bulge, allowing a distance estimate based on the density of stars in that direction. Making use of the Han & Gould model, we determine the probability distribution over the distance to the source, which is peaked at 8 kpc. Combining these measurements, we place a strong upper bound on the radius of the neutron star, R <= 12 km, while confining its mass to M <= 1.8 M_sun.

  16. First model-independent Dalitz analysis of $B^0 \\to DK^{*0}$, $D\\to K_S^0\\pi^+\\pi^-$ decay

    E-Print Network [OSTI]

    Negishi, K; Yamamoto, H

    2015-01-01

    We report a measurement of the amplitude ratio $r_S$ of $B^0 \\to D^0K^{*0}$ and $B^0 \\to \\bar{D^0}K^{*0}$ decays with a Dalitz analysis of $D\\to K_S^0\\pi^+\\pi^-$ decays, for the first time using a model-independent method. We set an upper limit $r_S cos(\\delta_S \\pm \\phi_3)$, $y_\\pm = r_S \\sin(\\delta_S \\pm \\phi_3)$ and $\\phi_3~(\\delta_S)$ is the weak (strong) phase difference between $B^0 \\to D^0K^{*0}$ and $B^0 \\to \\bar{D^0}K^{*0}$.

  17. Measurement of the CKM parameter cos(2phi_1) using time-dependent Dalitz analysis of B0bar -> D[Ks pi+ pi-] h0

    E-Print Network [OSTI]

    P. Krokovny; for the Belle Collaboration

    2006-07-28

    We present a measurement of the angle phi1 of the CKM Unitarity Triangle using time-dependent Dalitz analysis of D -> Ks pi+ pi- decays produced in neutral B meson decay to a neutral D meson and a light meson (B0bar -> D(*) h0). The method allows a direct extraction of 2phi1 and, therefore, helps to resolve the ambiguity between 2phi1 and pi-2phi1 in the measurement of sin 2phi1. We obtain sin 2phi1=0.78+-0.44+-0.22 and cos 2phi1=1.87+0.40+0.22 -0.53-0.32 The sign of cos 2phi1 is determined to be positive at 98.3% C.L.

  18. Real-Time Cardiac Imaging at 3 Tesla K.S. NAYAK, C.H. CUNNINGHAM, J.M. SANTOS, J.M. PAULY, AND D.G. NISHIMURA

    E-Print Network [OSTI]

    Nayak, Krishna

    Real-Time Cardiac Imaging at 3 Tesla K.S. NAYAK, C.H. CUNNINGHAM, J.M. SANTOS, J.M. PAULY, AND D are shown in Figure 2. Conclusions We have demonstrated real-time cardiac imaging at 3 Tesla with high SNR

  19. National Weather Service Wichita, KS

    E-Print Network [OSTI]

    ) Flashlight and extra batteries, or ones that generate their own energy by shaking them Battery operated and extra batteries Maps Small First Aid Kit White Distress Flag Tire Repair kit Winter supplies

  20. Secure Mediated Databases K.S. Candan

    E-Print Network [OSTI]

    Candan, Selçuk

    @cs.umd.edu Abstract With the evolution of the information superhighway, there is now an immense amount of information of paranoia. The Principle of Paranoia. The DBMS must take all steps necessary in order to insure the user. However, with the evolution of the information superhighway, there is now an immense amount

  1. K/S Relay Issue 4 

    E-Print Network [OSTI]

    Fish, L.; Rathbone, W.

    1982-01-01

    floodgate. The water backs up, the pressure increases, and sooner or later the river fincba way out: over the top: or spilling out at the sides, or seeping tHough the surrounding land, or by breaking the dam. In any case; the uncontrolled leaks..., "cutting a steer out of the herd. Is that one ear-marked for the days dinner?" "Eventually," said the scientist. "They do something odd with it first, also the killer whales are technically farmers more than herders. In that wide patch of seaweed behind...

  2. Microsoft Word - Gage-KS.doc

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

    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 WebQuantityBonneville Power Administration wouldMass map shines light on77 PAGE OF PAGESpersonal CERTIFIED MAIL Fuel3S FINAL

  3. Category:Wichita, KS | 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:QA J-E-1 SECTION J APPENDIX ECoopButte County,Camilla,Thermal Gradient Holes Jump to: navigation,Category

  4. T h e A l t e r n a t i v e E n e r g y T r u s t Business Plan

    E-Print Network [OSTI]

    ....................................................................................................................................................6 Geothermal Energy OF GEOTHERMAL HEATING ON UBC RESIDENTIAL DEVELOPMENTS With special thanks to Helen Goodland of GVRD, who helped .........................................................................................................................................3 Role of the Energy Trust

  5. Search for the decay B^+ \\to K_S^0 K_S^0 \\pi ^+

    SciTech Connect (OSTI)

    Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Lopez, L.; Palano, A.; Pappagallo, M.; /INFN, Bari /Bari U.; Eigen, G.; Stugu, B.; Sun, L.; /Bergen U.; Abrams, G.S.; Battaglia, M.; Brown, D.N.; Cahn, R.N.; Jacobsen, R.G.; /LBL, Berkeley /UC, 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. /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /Frascati /INFN, Genoa /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /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. /Karlsruhe U., EKP /Manchester U. /Maryland U. /Massachusetts U., Amherst /MIT, LNS /McGill U. /INFN, Milan /Milan U. /INFN, Milan /INFN, Milan /Milan U. /Mississippi U. /Montreal U. /Mt. Holyoke Coll. /INFN, Naples /Naples U. /INFN, Naples /INFN, Naples /Naples U. /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /INFN, Padua /Padua U. /INFN, Padua /INFN, Padua /Padua U. /Paris U., VI-VII /Pennsylvania U. /INFN, Perugia /Perugia U. /INFN, Pisa /Pisa U. /INFN, Pisa /Pisa, Scuola Normale Superiore /INFN, Pisa /Pisa U. /INFN, Pisa /Princeton U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /Rostock U. /Rutherford /DSM, DAPNIA, Saclay /South Carolina U. /SLAC /Stanford U., Phys. Dept. /SUNY, Albany /Tennessee U. /Texas U. /Texas U., Dallas /INFN, Turin /Turin U. /INFN, Trieste /Trieste U. /Valencia U., IFIC /Victoria U. /Warwick U. /Wisconsin U., Madison

    2009-02-23

    The authors search for charmless decays of charged B mesons to the three-body final state K{sub S}{sup 0}K{sub S}{sup 0}{pi}{sup +}. Using a data sample of 423.7 fb{sup -1} collected at the {Upsilon}(4S) resonance with the BABAR detector, corresponding to (465.1 {+-} 5.1) x 10{sup 6} B{bar B} pairs, they find no significant signal and determine a 90% confidence level upper limit on the branching fraction of 5.1 x 10{sup -7}.

  6. Measurement of the amplitude ratio of $B^0 \\to D^0K^{*0}$ and $B^0 \\to \\bar{D^0}K^{*0}$ decays with a model-independent Dalitz plot analysis using $D\\to K_S^0?^+?^-$ decays

    E-Print Network [OSTI]

    A. Abdesselam; I. Adachi; K. Adamczyk; H. Aihara; S. Al Said; K. Arinstein; Y. Arita; D. M. Asner; T. Aso; V. Aulchenko; T. Aushev; R. Ayad; T. Aziz; V. Babu; I. Badhrees; S. Bahinipati; A. M. Bakich; A. Bala; Y. Ban; V. Bansal; E. Barberio; M. Barrett; W. Bartel; A. Bay; I. Bedny; P. Behera; M. Belhorn; K. Belous; V. Bhardwaj; B. Bhuyan; M. Bischofberger; S. Blyth; A. Bobrov; A. Bondar; G. Bonvicini; C. Bookwalter; A. Bozek; M. Bra\\v{c; ko; J. Brodzicka; T. E. Browder; D. \\v{Cervenkov; M. -C. Chang; P. Chang; Y. Chao; V. Chekelian; A. Chen; K. -F. Chen; P. Chen; B. G. Cheon; K. Chilikin; R. Chistov; K. Cho; V. Chobanova; S. -K. Choi; Y. Choi; D. Cinabro; J. Crnkovic; J. Dalseno; M. Danilov; S. Di Carlo; J. Dingfelder; Z. Dole\\v{z; al; Z. Drásal; A. Drutskoy; S. Dubey; D. Dutta; K. Dutta; S. Eidelman; D. Epifanov; S. Esen; H. Farhat; J. E. Fast; M. Feindt; T. Ferber; A. Frey; O. Frost; M. Fujikawa; B. G. Fulsom; V. Gaur; N. Gabyshev; S. Ganguly; A. Garmash; D. Getzkow; R. Gillard; F. Giordano; R. Glattauer; Y. M. Goh; B. Golob; M. Grosse Perdekamp; J. Grygier; O. Grzymkowska; H. Guo; J. Haba; P. Hamer; Y. L. Han; K. Hara; T. Hara; Y. Hasegawa; J. Hasenbusch; K. Hayasaka; H. Hayashii; X. H. He; M. Heck; M. Hedges; D. Heffernan; M. Heider; A. Heller; T. Higuchi; S. Himori; T. Horiguchi; Y. Horii; Y. Hoshi; K. Hoshina; W. -S. Hou; Y. B. Hsiung; M. Huschle; H. J. Hyun; Y. Igarashi; T. Iijima; M. Imamura; K. Inami; A. Ishikawa; K. Itagaki; R. Itoh; M. Iwabuchi; M. Iwasaki; Y. Iwasaki; T. Iwashita; S. Iwata; I. Jaegle; M. Jones; K. K. Joo; T. Julius; D. H. Kah; H. Kakuno; J. H. Kang; K. H. Kang; P. Kapusta; S. U. Kataoka; N. Katayama; E. Kato; Y. Kato; P. Katrenko; H. Kawai; T. Kawasaki; H. Kichimi; C. Kiesling; B. H. Kim; D. Y. Kim; H. J. Kim; J. B. Kim; J. H. Kim; K. T. Kim; M. J. Kim; S. H. Kim; S. K. Kim; Y. J. Kim; K. Kinoshita; C. Kleinwort; J. Klucar; B. R. Ko; N. Kobayashi; S. Koblitz; P. Kody\\v{s; Y. Koga; S. Korpar; R. T. Kouzes; P. Kri\\v{z; an; P. Krokovny; B. Kronenbitter; T. Kuhr; R. Kumar; T. Kumita; E. Kurihara; Y. Kuroki; A. Kuzmin; P. Kvasni\\v{ck}a; Y. -J. Kwon; Y. -T. Lai; J. S. Lange; D. H. Lee; I. S. Lee; S. -H. Lee; M. Leitgab; R. Leitner; P. Lewis; J. Li; X. Li; Y. Li; L. Li Gioi; J. Libby; A. Limosani; C. Liu; Y. Liu; Z. Q. Liu; D. Liventsev; R. Louvot; P. Lukin; J. MacNaughton; D. Matvienko; A. Matyja; S. McOnie; Y. Mikami; K. Miyabayashi; Y. Miyachi; H. Miyake; H. Miyata; Y. Miyazaki; R. Mizuk; G. B. Mohanty; S. Mohanty; D. Mohapatra; A. Moll; H. K. Moon; T. Mori; H. -G. Moser; T. Müller; N. Muramatsu; R. Mussa; T. Nagamine; Y. Nagasaka; Y. Nakahama; I. Nakamura; K. Nakamura; E. Nakano; H. Nakano; T. Nakano; M. Nakao; H. Nakayama; H. Nakazawa; T. Nanut; Z. Natkaniec; M. Nayak; E. Nedelkovska; K. Negishi; K. Neichi; C. Ng; C. Niebuhr; M. Niiyama; N. K. Nisar; S. Nishida; K. Nishimura; O. Nitoh; T. Nozaki; A. Ogawa; S. Ogawa; T. Ohshima; S. Okuno; S. L. Olsen; Y. Ono; Y. Onuki; W. Ostrowicz; C. Oswald; H. Ozaki; P. Pakhlov; G. Pakhlova; H. Palka; E. Panzenböck; C. -S. Park; C. W. Park; H. Park; H. K. Park; K. S. Park; L. S. Peak; T. K. Pedlar; T. Peng; L. Pesantez; R. Pestotnik; M. Peters; M. Petri?; L. E. Piilonen; A. Poluektov; K. Prasanth; M. Prim; K. Prothmann; C. Pulvermacher; B. Reisert; E. Ribe\\v{z; l; M. Ritter; M. Röhrken; J. Rorie; A. Rostomyan; M. Rozanska; S. Ryu; H. Sahoo; T. Saito; K. Sakai; Y. Sakai; S. Sandilya; D. Santel; L. Santelj; T. Sanuki; N. Sasao; Y. Sato; V. Savinov; O. Schneider; G. Schnell; P. Schönmeier; M. Schram; C. Schwanda; A. J. Schwartz; B. Schwenker; R. Seidl; A. Sekiya; D. Semmler; K. Senyo; O. Seon; I. Seong; M. E. Sevior; L. Shang; M. Shapkin; V. Shebalin; C. P. Shen; T. -A. Shibata; H. Shibuya; S. Shinomiya; J. -G. Shiu; B. Shwartz; A. Sibidanov; F. Simon; J. B. Singh; R. Sinha; P. Smerkol; Y. -S. Sohn; A. Sokolov; Y. Soloviev; E. Solovieva; S. Stani?; M. Stari?; M. Steder; J. Stypula; S. Sugihara; A. Sugiyama; M. Sumihama; K. Sumisawa; T. Sumiyoshi; K. Suzuki; S. Suzuki; S. Y. Suzuki; Z. Suzuki; H. Takeichi; U. Tamponi; M. Tanaka; S. Tanaka; K. Tanida; N. Taniguchi; G. Tatishvili; G. N. Taylor; Y. Teramoto; F. Thorne; I. Tikhomirov; K. Trabelsi; V. Trusov; Y. F. Tse; T. Tsuboyama; M. Uchida; T. Uchida; Y. Uchida; S. Uehara; K. Ueno; T. Uglov; Y. Unno; S. Uno; P. Urquijo; Y. Ushiroda; Y. Usov; S. E. Vahsen; C. Van Hulse; P. Vanhoefer; G. Varner; K. E. Varvell; K. Vervink; A. Vinokurova; V. Vorobyev; A. Vossen; M. N. Wagner; C. H. Wang; J. Wang; M. -Z. Wang; P. Wang; X. L. Wang; M. Watanabe; Y. Watanabe; R. Wedd; S. Wehle; E. White; J. Wiechczynski; K. M. Williams; E. Won; B. D. Yabsley; S. Yamada; H. Yamamoto; J. Yamaoka; Y. Yamashita; M. Yamauchi; S. Yashchenko; J. Yelton; Y. Yook; C. Z. Yuan; Y. Yusa; C. C. Zhang; L. M. Zhang; Z. P. Zhang; L. Zhao; V. Zhilich; V. Zhulanov; M. Ziegler; T. Zivko; A. Zupanc; N. Zwahlen; O. Zyukova; The Belle Collaboration

    2015-03-04

    We report a measurement of the amplitude ratio $r_S$ of $B^0 \\to D^0K^{*0}$ and $B^0 \\to \\bar{D^0}K^{*0}$ decays with a model-independent Dalitz plot analysis using $D\\to K_S^0\\pi^+\\pi^-$ decays. Using the full data sample of $772\\times10^6$ $B\\bar{B}$ pairs collected at the $\\Upsilon(4S)$ resonance with the Belle detector at KEKB accelerator the upper limit is $r_S < 0.87$ at the 68 % confidence level. This result is the first measurement of $r_S$ with a model-independent Dalitz analysis, and is consistent with results from other analyses. The value of $r_S$ indicates the sensitivity of the decay to $\\phi_3$ because the statistical uncertainty is proportional to $1/r_S$. The $r_S$ result is obtained from observables ($x_\\pm$, $y_\\pm$) \\begin{eqnarray} x_- &=& +0.4 ^{+1.0 +0.0}_{-0.6 -0.1} \\pm0.0 \\\\ y_- &=& -0.6 ^{+0.8 +0.1}_{-1.0 -0.0} \\pm0.1 \\\\ x_+ &=& +0.1 ^{+0.7 +0.0}_{-0.4 -0.1} \\pm0.1 \\\\ y_+ &=& +0.3 ^{+0.5 +0.0}_{-0.8 -0.1} \\pm0.1 \\\\ , \\end{eqnarray} where $x_\\pm = r_S \\cos(\\delta_S \\pm \\phi_3)$, $y_\\pm = r_S \\sin(\\delta_S \\pm \\phi_3)$ and $\\phi_3 (\\delta_S)$ are the weak (strong) phase difference between $B^0 \\to D^0K^{*0}$ and $B^0 \\to \\bar{D^0}K^{*0}$. The first uncertainty is statistical, the second is the experimental systematic and the third is the systematic due to the uncertainties on $c_i$ and $s_i$ parameters measured by CLEO.

  7. Angel Unaware and Other K/S Stories 

    E-Print Network [OSTI]

    M.R.L.

    1986-01-01

    Highly accurate density data is required for engineering calculations to make property estimations in natural gas custody transfer through pipelines. It is also essential to have accurate pressure-volume-temperature (PVT) ...

  8. SURESH K.S. VANNAN Oak Ridge National Laboratory (ORNL)

    E-Print Network [OSTI]

    Post, Wilfred M.

    - Present Oak Ridge, TN, USA Job Functions · Manage tasks, staffing, finance, and reporting for NASA funded scientific activities (e.g. deforestation studies in Africa, environmental impact of oil exploration in Gabon

  9. INTERNAL CURING RESEARCH ON US-54 IN ALLEN CO, KS

    E-Print Network [OSTI]

    Cast 9:30 AM 10:30 AM Initial Set 6:10 PM (8:40 hours) 4:30 PM (6:00 hours) Final Set 10:20 PM (12 28 Day Shrinkage 0.030% 0.035% 28 Day Elastic Modulus 3500 ksi 3630 ksi 28 Day Poisson's Ratio 0.21 0

  10. Secure Mediated Databases K.S. Candan Sushil Jajodia \\Lambda V.S. Subrahmanian y

    E-Print Network [OSTI]

    Subrahmanian, V. S.

    @cs.umd.edu Abstract With the evolution of the information superhigh­ way, there is now an immense amount of informa IRI­93­57756. The Principle of Paranoia. The DBMS must take all steps necessary in order to insure the user. However, with the evolution of the information super­ highway, there is now an immense amount

  11. Vol. 2007, No. 2, June 1, 2006 Periodical postage paid at Lawrence, KS 66045

    E-Print Network [OSTI]

    ............................................. 8 Wheat Law Library ................................................................ 8 Library ............................................................ 10 Residency Classification ................................................ 10 Academic Information

  12. Multivariate Analysis from a Statistical Point of View K.S. Cranmer

    E-Print Network [OSTI]

    Fernandez, Thomas

    -Madison, Madison, WI 53706, USA Multivariate Analysis is an increasingly common tool in experimental high energy Multivariate Analysis is an increasingly common tool in experimental high energy physics; however, most algorithms do internally is optimal for the the tasks which they perform within high energy physics

  13. $K_S$ semileptonic decays and test of $\\mathcal{CPT}$ symmetry with the KLOE detector

    E-Print Network [OSTI]

    D. Kami?ska

    2015-01-19

    Study of semileptonic decays of neutral kaons allows to perform a test of discrete symmetries, as well as basic principles of the Standard Model. In this paper a general review on dependency between charge asymmetry constructed for semileptonic decays of short- and long-lived kaons and $\\mathcal{CPT}$ symmetry is given.

  14. K+'s Collective Flow in Heavy-ion Collisions predicted by Covariant Kaon Dynamics

    E-Print Network [OSTI]

    Yong-Zhong Xing; Yue-Qian Dai; Yu-Ming Zheng

    2014-11-03

    The directed and elliptic flows of positively charged Kaon produced in $^{58}_{28}$Ni + $^{58}_{28}$Ni reaction at incident kinetic energy 1.91 AGeV, experimental data are released newly by V. Zinyuk,et.al. in Ref.[arXiv: 1403.1504v2 [nucl-ex] 8 Apr 2014], are reproduced by using the covariant kaon dynamics. Our numerical results indicate qualitatively the Lorentz force is necessary to explained reasonably the data as soon as the space-like part of kaon's vector potential is involved. The sensitivity of $K^+$ directed as well as differential directed flow on the Lorentz force are also observed near target rapidity.

  15. Search for Lepton Flavour Violating Decays Tau -> l Ks with the BABAR Detector

    SciTech Connect (OSTI)

    Cenci, Riccardo; /SLAC

    2009-03-20

    We present the search for the lepton flavour violating decay {tau} {yields} lK{sup 0}{sub s} with the BaBar experiment data. This process and many other lepton flavour violating {tau} decays, like {tau} {yields} {mu}{gamma} and {tau} {yields} lll, are one of the most promising channel to search for evidence of new physics. According to the Standard Model and the neutrino mixing parameters, branching fractions are estimated well below 10{sup -14}, but many models of new physics allow for branching fractions values close to the present experimental sensitivity. This analysis is based on a data sample of 469fb{sup -1} collected by BABAR detector at the PEP-II storage ring from 1999 to 2007, equivalent to 431 millions of {tau} pairs. the BABAR experiment, initially designed for studying CP violation in B mesons, has demonstrated to be one of the most suitable environments for studying {tau} decays. The tracking system, the calorimeter and the particle identification of BABAR, together with the knowledge of the {tau} initial energy, allow an extremely powerful rejection of background events that, for this analysis, is better than 10{sup -9}. Being {tau} {yields} lK{sup 0}{sub s} a decay mode without neutrinos, the signal {tau} decay can be fully reconstructed. Kinematical constraints are used in a fit that provides a decay tree reconstruction with a high resolution. For this analysis MC simulated events play a decisive role for estimating the signal efficiency and study the residual background. High statistics MC sample are produced simulating detector conditions for different periods of data collection, in order to reduce any discrepancies with the data. When discrepancies can not be removed, we perform studies to compute a correction factor or an estimation of systematic errors that need to be included in the final measurement. A significant improvement of the current result can be reached only with a higher statistics and, therefore, with a new collider providing a luminosity from 10 to 100 times more than PEP-II. A new detector, with improved performance and able to collect data in a high background environment, is also requested to fully exploit the capability of such amount of data. In fact, only keeping the efficiency and the background as similar as possible to present ones, we will be able to scale almost linearly the estimated upper limit according to the luminosity. The strong potential of improvement for the search of lepton flavour violation {tau} decays makes the building of such a machine highly desirable.

  16. Quantifying Surface Subsidence along US Highway 50, Reno County, KS using Terrestrial LiDAR

    E-Print Network [OSTI]

    Herrs, Andrew J.

    2010-04-23

    by Brett Bennett of the Kansas Geological Survey. Initial scouting of the study area was done with the help of Bob Henthorne from KDOT. LiDAR acquisition at each project site was accomplished with the help of Nick Laskares, Willy Rittase, Ken Stalder..., Mike Taylor, Lynn Watney, the Hutchinson KDOT maintenance crew, and KDOT’s Salina Regional Geology Department. Kwan Yee Cheng and Richard Styron also helped with plotting data in MATLAB. ArcMap techniques were demonstrated by Prabin Shilpakar from...

  17. File:USDA-CE-Production-GIFmaps-KS.pdf | 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 Pages RecentTempCampApplicationWorksheet 2011.pdf JumpTransmission

  18. Climate Action Champions: Mid-America Regional Council, KS and MO |

    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-in electric vehicle (PEV) chargingWASHINGTON, DCThe City of Dubuque,DC,

  19. Table 2. Ten largest plants by generation capacity, 2013

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

    Inc",646 6,"Lawrence Energy Center","Coal","Westar Energy Inc",534 7,"Flat Ridge 2 Wind Energy LLC","Wind","AE Power Services LLC",470.4 8,"Hutchinson Energy Center","Natural...

  20. Using Internet Mapping to Assist Natural Resource Planning & Management

    E-Print Network [OSTI]

    Houts, Michael

    2013-03-13

    GIS/Remote Sensing Specialist, KS Department of Wildlife & Parks, KS Applied Remote Sensing & KS Biological Survey

  1. EV Community Readiness projects: Delaware Valley Regional Planning Commission (PA); Metropolitan Energy Information Center, Inc. (KS, MO)

    Broader source: Energy.gov [DOE]

    2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

  2. Mycologia, 96(2), 2004, pp. 295309. 2004 by The Mycological Society of America, Lawrence, KS 66044-8897

    E-Print Network [OSTI]

    Matheny, P. Brandon

    , Horak 1977, 1979, 1980, Kobayasi 1952, Kobayashi 2002, Kuyper 1986, Losa Quintana 1960, Perez-Silva 1967, and I. ortegae Es- teve-Ravento´s, reported with Quercus from Spain. In- ocybe rennyi (Berk. & Broome

  3. Mycologia, 97(4), 2005, pp. 762769. 2005 by The Mycological Society of America, Lawrence, KS 66044-8897

    E-Print Network [OSTI]

    66044-8897 Spore dispersal of a resupinate ectomycorrhizal fungus, Tomentella sublilacina, via soil food fungus that sporulates in the soil organic horizon, can establish from the spore bank shortly after dis could be dispersed via spore-based food webs. We ex- amined external surfaces, gut contents and feces

  4. Integrated Visualization of PhysiologicData in Cardiovascular Applications A Carrillo', GA Wright', JH Brittain', KS Nayak', BS Hu3

    E-Print Network [OSTI]

    Nayak, Krishna

    of both spatial and temporal correlation between physiologic and anatomic data are lost to the operator to set thresholds for both the magnitude and velocity values that should be color mapped. This allows will load a complete series and play it in a cine loop at a configurable frame rate. Once the imageshave

  5. Mycologia, 94(5), 2002, pp. 772780. 2002 by The Mycological Society of America, Lawrence, KS 66044-8897

    E-Print Network [OSTI]

    ). Each time the clonal lineage with the fewest mutations is lost through drift, the genetic load in had theta values that were not signifi- cantly different from what one would expect for the null value for the Fisher combined probability (combining all 9 loci) was significant and indicated

  6. Mycologia, 96(6), 2004, pp. 13301338. 2004 by The Mycological Society of America, Lawrence, KS 66044-8897

    E-Print Network [OSTI]

    Blanchette, Robert A.

    that occur on willow (Salix spp.) in North America in one species complex, Melampsora epitea Thu obtained from urediniospores from rust- infected Salix leaves collected in the Canadian arctic that arctic and tem- perate Melampsora species on Salix hosts in North America have evolved distinct molecular

  7. Mycologia, 95(2), 2003, pp. 294307. 2003 by The Mycological Society of America, Lawrence, KS 66044-8897

    E-Print Network [OSTI]

    Zealand, Portugal (on the mainland and Azores and Madeira islands), Spain (on the mainland and Canary Is; Hawaii; Por- tugal, including the Madeira Islands; and South Af- rica. Botryosphaeria ribis- cific islands (Rebelo 1995). Proteaceae as cut flowers are valued in international markets. Consequently

  8. State","County","NOAA Climate Division (Number)","NOAA Climate...

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

    CENTRAL",3 "KS","SHERIDAN",1,"NORTHWEST",2 "KS","SHERMAN",1,"NORTHWEST",2 "KS","SMITH",2,"NORTH CENTRAL",2 "KS","STAFFORD",8,"SOUTH CENTRAL",3 "KS","STANTON",7,"SOUTHWEST",...

  9. Measurement of cos(2beta) in B0 -> D(*)0 h0 decays with a time-dependent Dalitz plot analysis of D0 -> Ks pi+ pi-

    E-Print Network [OSTI]

    The BABAR Collaboration; B. Aubert

    2006-07-29

    We report a preliminary measurement of $\\cos2\\beta$ in $B^0\\to D^{(*)0}h^0$ decays with a time-dependent Dalitz plot analysis of $D^0\\to K_S\\pi^+\\pi^-$, where $h^0$ is a light neutral meson such as $\\pi^0$, $\\eta$, $\\eta'$ or $\\omega$. The strong phase variation on the Dalitz plot allows the access to the angle $\\beta$ with only a two-fold ambiguity ($\\beta+\\pi$). Using $311\\times 10^{6}$ $B\\bar{B}$ pairs collected at the Babar detector, we obtain $\\cos2\\beta = 0.54 \\pm 0.54 \\pm 0.08 \\pm 0.18$, $\\sin2\\beta = 0.45 \\pm 0.36 \\pm 0.05 \\pm 0.07$, and $|\\lambda| = 0.975^{+0.093}_{-0.085} \\pm 0.012 \\pm 0.002 $, where the first errors are statistical, the second are experimental systematic uncertainties, and the third are the signal Dalitz model uncertainties. This measurement favors the solution of $\\beta= 22^\\circ$ over $68^\\circ$ at an 87% confidence level.

  10. CSU Power Systems (all Values in K$s unless noted otherwise) Cost Center: 9417 Revision for FDR 060911R1

    E-Print Network [OSTI]

    Princeton Plasma Physics Laboratory

    .2 542 - Kirk Key Interlocks $75.8 Kirk Keys kirk key changes 4/1/2013 6/1/2013 1 1 1 lot 15.000 15.

  11. Business Career Services Center | 1300 Sunnyside Ave. Rm. 125 | Lawrence, KS 66045 | (785) 864-5591 | www.business.ku.edu

    E-Print Network [OSTI]

    Production Managers Industry Relations Specialist Insurance Agent/Broker Inventory Control Specialist management, administrative theory, and international management emphasizes the processes of planning, organizing, leading and controlling organizations. The program is intended to help you develop

  12. (rev. 8.14) 1465 Jayhawk Blvd. | Lawrence, KS 66045-7614 | 785-864-3390 | Fax 785-864-5393 | www.sadp.ku.edu

    E-Print Network [OSTI]

    and Order, New York, NY: Van Nostrand Reinhold Co., 1979. Edwards, Betty. Drawing on the Right Side Home in the World, New York, NY: Viking, 1989. Ryker, Lori. Mockbee coker: Thought and Process, New: Alexander, Christopher. The Timeless Way of Building, New York: Oxford University Press, 1979. Benedikt

  13. 2008 Wind Energy Projects, Wind Powering America (Poster)

    SciTech Connect (OSTI)

    Not Available

    2009-01-01

    The Wind Powering America program produces a poster at the end of every calendar year that depicts new U.S. wind energy projects. The 2008 poster includes the following projects: Stetson Wind Farm in Maine; Dutch Hill Wind Farm in New York; Grand Ridge Wind Energy Center in Illinois; Hooper Bay, Alaska; Forestburg, South Dakota; Elbow Creek Wind Project in Texas; Glacier Wind Farm in Montana; Wray, Colorado; Smoky Hills Wind Farm in Kansas; Forbes Park Wind Project in Massachusetts; Spanish Fork, Utah; Goodland Wind Farm in Indiana; and the Tatanka Wind Energy Project on the border of North Dakota and South Dakota.

  14. Elucidation of the Role of Leucine Aminopeptidase A in the Wound Response Pathway in Tomato

    E-Print Network [OSTI]

    Scranton, Melissa Ann

    2013-01-01

    and thioredoxins. Science Tasaki T, Sriram SM, Park KS, Kwon183: 1489-1490 Tasaki T, Sriram SM, Park KS, Kwon YT (2012)

  15. KU Parking &Transit | 1501 Irving Hill Road | Lawrence, KS 66045 | (785) 864-PARK | Fax: (785) 864-5220 | parking.ku.edu | kupark@ku.edu 2014-2015 Parking Regulations

    E-Print Network [OSTI]

    ; and maximize parking area consistent with land needs for the academic function, topography, financial through the sale of permits, fines, and other user fees. It receives no income from state or tuition funds

  16. KU Parking &Transit | 1501 Irving Hill Road | Lawrence, KS 66045 | (785) 864-PARK | Fax: (785) 864-5220 | parking.ku.edu | kupark@ku.edu 2015-2016 Parking Regulations

    E-Print Network [OSTI]

    ; and maximize parking area consistent with land needs for the academic function, topography, financial through the sale of permits, fines, and other user fees. It receives no income from state or tuition funds

  17. Table 2 -Lime use and practices on Corn, major producing states, 2001 CO GA IL IN IA KS KY MI MN MO NE NY NC ND OH PA SD TX WI Area

    E-Print Network [OSTI]

    Kammen, Daniel M.

    MO NE NY NC ND OH PA SD TX WI Area Lime applied NR 85 81 85 67 16 72 55 27 65 10 57 53 NR 70 95 3 1 50 51 Lime (tons treated acre) NR 1.0 2.1 1.9 2.5 2.1 2.4 2.0 2.6 2.8 1.5 1.9 1.1 NR 1.9 1.7 NR 0.5 2 NC ND OH PA SD TX WI Area Lime applied NR 95 90 69 18 69 71 14 77 16 76 99 NR 82 80 NR 5 58 54 Lime

  18. IEEE TRANSACTIONS ON COMPUTER-AIDED DESIGN OF INTEGRATED CIRCUITS AND SYSTEMS, VOL. 22, NO. 5, MAY 2003 627 [3] , MicroC/OS-II. Lawrence, KS: R & D Books, 1998.

    E-Print Network [OSTI]

    Mazumder, Pinaki

    and G. De Micheli, Dynamic Power Management: Design Techniques and CAD Tools. Norwell, MA: Kluwer, 1997. [9] A. R. Chandrakasan and R. W. Brodersen, Low Power Digital CMOS Design. Norwell, MA: Kluwer, 1995. [10] G. Yeap, Practical Low Power Digital VLSI Design. Norwell, MA: Kluwer, 1998. [11] J. Monteiro

  19. Westborough, Massachusetts: Energy Resources | 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:QA J-E-1 SECTION J APPENDIX ECoop IncIowa (Utility Company)Idaho)VosslohWest Plains Electric Coop IncWestar

  20. Western BioEnergy Ltd | 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:QA J-E-1 SECTION J APPENDIX ECoop IncIowa (Utility Company)Idaho)VosslohWest Plains Electric Coop IncWestarBioEnergy

  1. Workplace Charging Challenge Partner: World Learning Inc. | Department of

    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 DeliciousMathematics And Statistics » USAJobs SearchAMERICA'SEnergyofThe HartfordUnum GroupDepartmentWestar

  2. Electrostatic Modeling of CMOS sensor array 1 Computing Security

    E-Print Network [OSTI]

    Cukic, Bojan

    pw KS-TGS 1 2 2 9 KERBEROS 1. U KS U's identity 2. KS TGS E ( (SG ,U), KS-TGS) KS U E (SG+TG, pw Server TGS- F + SF Ticket to File Server to Access File F + SF SG Request ticket to Access File F SG 1 2 12 KERBEROS 4. U TGS E ( Request+TG, SG ) 5. TGS U E ( E ( (Ticket, SF), TGS-F), SF , SG) 6. U D

  3. Systematic Variability of Soil Hydraulic Conductivity Across Three Vertisol Catenas 

    E-Print Network [OSTI]

    Rivera, Leonardo Daniel

    2011-10-21

    Soil hydraulic properties, such as saturated hydraulic conductivity (Ks), have high spatial variation, but little is known about how to vary a few measurements of Ks over an area to model hydrology in a watershed with ...

  4. Biodegradability of select polycyclic aromatic hydrocarbon (pah) mixtures 

    E-Print Network [OSTI]

    Desai, Anuradha M.

    2007-04-25

    of common enzyme systems. Competitive inhibition became pronounced under conditions of: Ks1 > Ks1 and S1 >> S. Experiments with equitable concentrations of substrates demonstrated the effect of concentration on competitive inhibition. Ternary...

  5. Electronic Structure and Adaptive 5f Character in Plutonium Materials J.J. Joyce, T. Durakiewicz, K.S. Graham, E.D. Bauer, J.X. Zhu, R.L. Martin, J.M. Wills, L.E. Roy, J.N. Mitchell, D.P.

    E-Print Network [OSTI]

    Electronic Structure and Adaptive 5f Character in Plutonium Materials J.J. Joyce, T. Durakiewicz, K 77005 INTRODUCTION Plutonium materials from Mott insulators to strongly correlated metals exhibit and ligand states leading to substantial covalent bonding while the light actinide oxide series is otherwise

  6. Double-blind randomized 12-month soy intervention had no effects on breast MRI fibroglandular tissue density or mammographic density

    E-Print Network [OSTI]

    2015-01-01

    of 2- month controlled green tea intervention on lipoproteinR, Yuan JM, Khoo KS, et al. Green tea, soy, and mammographic

  7. The Relation Between Reasoning and the Structure of Knowledge When Solving Mechanical Problems

    E-Print Network [OSTI]

    Reisz, Z

    2015-01-01

    performance on tests of mechanical comprehension (Master’s10.1002/tea.366031100 Mechanical Self-Efficacy Proceduralcomposition of Note. MSE = mechanical self-efficacy, KS =

  8. ESPA Authoring Template

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

    Operator Location Length (mi) Diameter (in) Estimated Flow Capacity (MMcfd) Small Scale Distribution Systems Coffeyville- Burbank Chaparral Energy KS, OK 68 8 80 Enid-Purdy...

  9. Understanding the role of the microenvironment in cardiovascular differentiation

    E-Print Network [OSTI]

    Gluck, Jessica Marie

    2013-01-01

    KS. Photo crosslinking of gelatin macromers to synthesizepolymerizable hyaluronan-gelatin hydrogel. Biomaterials,science and technology of gelatin. 1977, London: Academic

  10. How Big a Problem is U.S. Corporate Governance?

    E-Print Network [OSTI]

    Kaplan, Steve

    2007-01-01

    securities and asset management divisions. This implies that10-Ks for Calamos Asset Management, Eaton Vance, and JanusInstitutional Securities Asset Management J.P. Morgan Chase

  11. USAJobs Search | Department of Energy

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

    management and operational support to BPA. The KS organization includes: Customer Data Management, Customer Contract Management, Customer Portal, Agency Meter Services,...

  12. THE PALEY-WIENER THEOREM FOR THE HUA SYSTEM Section 1 ...

    E-Print Network [OSTI]

    1998-10-14

    generalizing earlier work of Hua Hu , Kory ani -Stein KS , and Kory ani-Malliavin ... system with the same properties as the Jhonson-Kory ani system.

  13. Better Buildings Residential Network Workforce/Business Partners...

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

    conversion rates and strategies? Future Call Topics Poll 2 Call Participants Baltimore, MD Boulder, CO Charlottesville, VA Cincinnati, OH Kansas City, KS...

  14. Business Analyst

    Broader source: Energy.gov [DOE]

    The incumbent in this position will serve as the senior Business Analyst in the Customer Support Services (KS) organization. This organization provides overall customer contract management and...

  15. Update on HHV-8-Associated Malignancies

    E-Print Network [OSTI]

    Sunil, Meena; Reid, Erin; Lechowicz, Mary Jo

    2010-01-01

    herpesvirus-associated oncogenesis. Semin Cancer Biol 2008,molecular biology and oncogenesis. Cancer Lett 2009 (Epubof KS. induced oncogenesis, the reader is referred to Liang

  16. Security and United States Immigration Policy

    E-Print Network [OSTI]

    Totten, Robbie James

    2012-01-01

    2009 [1981]. American National Security, 6th ed. Baltimore,1977. Economic Issues and National Security. Lawrence, KS:Immigration and National Security. Westport, CT: Praeger

  17. Probing Hard ColorSinglet Exchange in pp Collisions s = 630 GeV and 1800 GeV

    E-Print Network [OSTI]

    . Gutierrez, 23 P. Gutierrez, 44 N.J. Hadley, 33 H. Haggerty, 23 S. Hagopian, 21 V. Hagopian, 21 K.S. Hahn, 41

  18. Measurement of W and Z boson production cross sections B. Abbott, 40 M. Abolins, 37 V. Abramov, 15 B.S. Acharya, 8 I. Adam, 39 D.L. Adams, 49

    E-Print Network [OSTI]

    . Gutierrez, 23 P. Gutierrez, 45 N.J. Hadley, 33 H. Haggerty, 23 S. Hagopian, 21 V. Hagopian, 21 K.S. Hahn, 41

  19. Other Participants 2000 | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Paul M. Dorman High School , Spartanburgh , SC Punahou Academic High School , Honolulu , HI Reno High School , Reno , NV Shawnee Mission South High School , Shawnee Mission , KS...

  20. bib-sunflower | netl.doe.gov

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

    Integration of Low-NOx Burners with an Optimization Plan for Boiler Combustion - Project Brief PDF-72KB (Withdrawn) Sunflower Electric Power Corp., Garden City, Finney County, KS...

  1. On environmental lifecycle assessment for policy selection

    E-Print Network [OSTI]

    Rajagopal, Deepak

    2010-01-01

    KS Tyson. An overview of biodiesel and petroleum diesel lifebiofuels: Bioethanol and biodiesel. Biomass and Bioenergy,switchgrass, and wood; biodiesel production using soybean

  2. Economics of Lifecycle analysis and greenhouse gas regulations

    E-Print Network [OSTI]

    Rajagopal, Deepak

    2009-01-01

    switchgrass, and wood; biodiesel production using soybeanKS Tyson. An overview of biodiesel and petroleum diesel lifefrom grains and cane) and biodiesel (from oil seeds) which

  3. COMPILATION OF CURRENT HIGH ENERGY PHYSICS EXPERIMENTS July 1976

    E-Print Network [OSTI]

    Kelly, R.L.

    2012-01-01

    KL ANYTHING P NUCLEUS --) KS ANYTHING LA,. ,80A P --)ANYTHING ALA"'80A P --) ANYTHING LAMBDA P --) LA,. ,BDA P

  4. COMPILATION OF CURRENT HIGH ENERGY PHYSICS EXPERIMENTS

    E-Print Network [OSTI]

    Kelly, R.L.; Particle Data Group

    2008-01-01

    KL ANYTHING P NUCLEUS --) KS ANYTHING LA,. ,80A P --)ANYTHING ALA"'80A P --) ANYTHING LAMBDA P --) LA,. ,BDA P

  5. COMPILATION OF CURRENT HIGH ENERGY PHYSICS EXPERIMENTS - July 1976

    E-Print Network [OSTI]

    Kelly, R.L.

    2010-01-01

    KL ANYTHING P NUCLEUS --) KS ANYTHING LA,. ,80A P --)ANYTHING ALA"'80A P --) ANYTHING LAMBDA P --) LA,. ,BDA P

  6. "DOE IDIQ ESPC Awarded Projects Summary

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

    6371,5830331,30983,9,278847 114,"Honeywell International, Inc.","Eisenhower Museum and Library","Abilene","KS","Central","Nat'l Archives and Records Administration","Building...

  7. EIS-0407: EPA Notice of Availability of the Draft Environmental...

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

    Federal Funding, Located near the City Hugoton, Stevens County, KS Notice of Availability of the Draft Environmental Impact Statement for the Proposed Abengoa Biorefinery...

  8. A Formaldehyde Exposure Assessment Tool for Occupants of FEMA Temporary Housing Units

    E-Print Network [OSTI]

    Parthasarathy, Srinandini

    2011-01-01

    GS = Gulfstream Cavalier; KS = Keystone; PI = Pilgrim Temp =River Fleetwood Gulfstream Keystone Reference Upper Lower RForest River Gulfstream Keystone Pilgrim Cavalier Coachman

  9. INFLUENCE DES DFAUTS TENDUS SUR LES PROPRITS SUPRACONDUCTRICES DU NIOBIUM (1)

    E-Print Network [OSTI]

    Boyer, Edmond

    de Ks, et à leur nature, observée au microscope électronique. Abstract. 2014 Superconducting magnetic properties, normal and superconducting thermal conductivity (Kn and Ks respectively), and residual superconductors shows in particular how the temperature variation law of the Ginzburg-Landau-Maki para- meter, 03

  10. 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{\

  11. REVIEW ON '/ TAKU YAMANAKA

    E-Print Network [OSTI]

    Fermilab

    ( / ) by -3Im( / ) (1.36) KL TARGET · · BENT CRYSTAL KS TARGET KL FINAL COLLIMATOR KS TAGGING STATION PROTON CRYSTAL, CORRECT FOR LIGHT UNIFORMITY NON-LINEARITY MC GENERATES SHOWERS WITH FINITE INCIDENT ANGLES MC SIMULATES WRAPPINGS AND SHIMS BETWEEN CRYSTALS AND MORE... It is possible that the cluster we reconstruct

  12. A&A 508, 14171421 (2009) DOI: 10.1051/0004-6361/200912945

    E-Print Network [OSTI]

    Robrade, Jan

    2009-01-01

    Pegasi ­ a planet-bearing Maunder minimum candidate K. Poppenhäger1, J. Robrade1, J. H. M. M. Schmitt1 planet-bearing star, in a 55 ks XMM-Newton pointing and in 5 ks pointings each with Chandra HRC. 1995), which monitors the Ca ii H and K line fluxes of main sequence stars, the star shows a very low

  13. 1SG 2SG 3SG 1PL 2PL 3PL IND.PRS -n -d -b -me -te -vad

    E-Print Network [OSTI]

    Pentus, Mati

    - PERS IMPS POS NEG POS NEG PRS IND (3)-- (3)- (4)-Takse/-akse (4)-Ta COND (3)-ksi- (3)-ks (4)-Taks IMP) , (4) -- . COND.PRS.PERS.POS.3SG -ksi- -ks. IND.PST.PERS.POS.3SG -si- -s ( ) -is ( ). PST

  14. Small Unmanned Aircraft Systems Technology and Applications in Agriculture

    E-Print Network [OSTI]

    Burchfield, David

    2014-11-19

    • Emphases: Geographic Information Systems (GIS) and Remote Sensing EDUCATIONAL BACKGROUND Kansas State University, Manhattan, KS • Master of Arts (2014) • Department of Geography • Emphases: GIS, Remote Sensing, Unmanned Aircraft Systems • Graduate Advisor... • Emphases: Geographic Information Systems (GIS) and Remote Sensing EDUCATIONAL BACKGROUND Kansas State University, Manhattan, KS • Master of Arts (2014) • Department of Geography • Emphases: GIS, Remote Sensing, Unmanned Aircraft Systems • Graduate Advisor...

  15. APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Nov. 1987, p. 2617-2623 0099-2240/87/112617-07$02.00/0

    E-Print Network [OSTI]

    Colorado at Boulder, University of

    . The Ks value for PNP mineralization by Pseudomonas sp. was 1.1 ,ug/ml, whereas the Ks values for phenol not enable Pseudomonas sp. to mineralize 10 ng of PNP per ml but did enhance the degradation of higher concentrations of PNP. This enhanced degradation resulted from the simultaneous use of glucose and PNP

  16. Statistical Properties of the Cluster Dynamics of the Systems of ...

    E-Print Network [OSTI]

    1910-70-12

    domain of applications in such fields as plasma physics, geophysics and oth- ers (see [KS1, KS2, ..... Approximately linear form of the plots suggests that we have a power law dependence. M. 1 .... Applications, 2nd ed. New York: Wiley, 1987.

  17. Molecular Variation within and among Species of Harpellales

    E-Print Network [OSTI]

    Gottlieb, Alexandra M.; Lichtwardt, Robert W.

    2001-01-01

    sp DGK-2-3 S commune KS-12-13L S commune KS-2-21 S commune KS-5-2 S commune KS-6-6 S commune OK-8-4 S commune TN-3-16 Smittium sp OK-3-22 Smittium sp SWI-4-13 Smittium sp JAP-51-5 S simulii AUS-59-5L Smittium sp CR-133-2 S phytotelmatum 7... 400 AF277005; AF277006 Smittium annulatum Lichtwardt CR-143-8 Simuliidae Costa Rica 700 900 AF277024 Smittium caudatum Lichtw. 8c G rigg KS-1-2 Chironomidae Kansas, USA 500 1100 AF277031; AF277032; AF277033 Smittium coloradense Lichtw. 8c W illiams...

  18. Prolonged experimental drought reduces plant hydraulic conductance and transpiration and increases mortality in a piñon–juniper woodland

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

    Pangle, Robert E.; Limousin, Jean -Marc; Plaut, Jennifer A.; Yepez, Enrico A.; Hudson, Patrick J.; Boutz, Amanda L.; Gehres, Nathan; Pockman, William T.; McDowell, Nate G.

    2015-03-23

    Plant hydraulic conductance (ks) is a critical control on whole-plant water use and carbon uptake and, during drought, influences whether plants survive or die. To assess long-term physiological and hydraulic responses of mature trees to water availability, we manipulated ecosystem-scale water availability from 2007 to 2013 in a piñon pine (Pinus edulis) and juniper (Juniperus monosperma) woodland. We examined the relationship between ks and subsequent mortality using more than 5 years of physiological observations, and the subsequent impact of reduced hydraulic function and mortality on total woody canopy transpiration (EC) and conductance (GC). For both species, we observed significant reductionsmore »in plant transpiration (E) and ks under experimentally imposed drought. Conversely, supplemental water additions increased E and ks in both species. Interestingly, both species exhibited similar declines in ks under the imposed drought conditions, despite their differing stomatal responses and mortality patterns during drought. Reduced whole-plant ks also reduced carbon assimilation in both species, as leaf-level stomatal conductance (gs) and net photosynthesis (An) declined strongly with decreasing ks. Finally, we observed that chronically low whole-plant ks was associated with greater canopy dieback and mortality for both piñon and juniper and that subsequent reductions in woody canopy biomass due to mortality had a significant impact on both daily and annual canopy EC and GC. Our data indicate that significant reductions in ks precede drought-related tree mortality events in this system, and the consequence is a significant reduction in canopy gas exchange and carbon fixation. Our results suggest that reductions in productivity and woody plant cover in piñon–juniper woodlands can be expected due to reduced plant hydraulic conductance and increased mortality of both piñon pine and juniper under anticipated future conditions of more frequent and persistent regional drought in the southwestern United States.« less

  19. What can BeppoSAX do about the 2-10 keV cosmic background ? A progress report

    E-Print Network [OSTI]

    L. Chiappetti; G. Cusumano; S. Del Sordo; M. C. Maccarone; T. Mineo; S. Molendi

    1997-12-18

    We report the current status of the analysis of the MECS background using the entire dataset of the BeppoSAX Science performance Verification Phase. We have collected 360 ks of dark Earth instrumental background, 470 ks of bright Earth background and 1100 ks of blank field data. We are attempting to model the instrumental background in terms of its various components (in particular the spatial modulation of the residual contamination by the built-in Fe calibration sources), and then use this model, and the information on the vignetting and the PSF to derive the cosmic background in the 2-10 keV range

  20. Update on the treatment of genital warts

    E-Print Network [OSTI]

    Scheinfeld, Noah

    2013-01-01

    IP. Protective effects of green tea extracts(polyphenon EPMID: 19709100 18. Rosen T. Green tea catechins: biologicSM, Monk BJ, Tewari KS. Green tea catechins for treatment of

  1. BRUCE T. ANDERSON Professor, Department of Earth and Environment, Boston University

    E-Print Network [OSTI]

    Hutyra, Lucy R.

    TJ, Kassam KS, Templer PH, Anderson BT, Battles JJ, Campbell JL, Driscoll CT, Green MB, Rodenhouse NL.M., 2015: Monsoon dynamics, and their effects on tea yield in China based on a yield response model

  2. Environmental Toxicology and Chemistry, Vol. 24, No. 1, pp. 129135, 2005 Printed in the USA

    E-Print Network [OSTI]

    Yu, Peter K.N.

    129 Environmental Toxicology and Chemistry, Vol. 24, No. 1, pp. 129­135, 2005 2005 SETAC Printed,§ RUDOLF S.S. WU, and PAUL K.S. LAM* Department of Biology and Chemistry, Department of Physics

  3. 2000 ( . -2000. -

    E-Print Network [OSTI]

    2000 . 2000 ( ) . - 2000. - 534 2000 . - 2000. - 535 .., .., .., .., .., .., .., .., .., .., .., .., .., .., .., .. () .-.. (...) - 2000. - 536 .. -. 01.04.08 - . ...-... - 2000. - 537 .. Ks -> 30. 01.04.16 - . ...-.. - 2000. - 538 .. -> + - -> + -. 01.04.16 - . ...-.. - 2000. - 539 .. - -2. 01

  4. A VERY DEEP CHANDRA OBSERVATION OF A1795: THE COLD FRONT AND COOLING WAKE

    E-Print Network [OSTI]

    Ehlert, Steven

    We present a new analysis of very deep Chandra observations of the galaxy cluster A1795. Utilizing nearly 750 ks of net ACIS imaging, we are able to resolve the thermodynamic structure of the intracluster medium (ICM) on ...

  5. Generic Argillite/Shale Disposal Reference Case

    E-Print Network [OSTI]

    Zheng, Liange

    2014-01-01

    S. and K.S. Johnson, (1984). Shale and other argillaceousand R. T. Cygan, (2010). Shale Disposal of U.S. High-LevelDC. Generic Argillite/Shale Disposal Reference Case August

  6. MFR PAPER 1216 The Workshop on Molluscan

    E-Print Network [OSTI]

    of Kansas Medical Center, 39th and Rainbow Boulevard, Kansas City, KS 66103. October 1976 DANTE G. SCARPELLI such as a hydrocarbon present in fuel oil, for example, and the ultimate development of a "tumor". The autonomous nature

  7. NEAR-INFRARED THERMAL EMISSION DETECTIONS OF A NUMBER OF HOT JUPITERS AND THE SYSTEMATICS OF GROUND-BASED NEAR-INFRARED PHOTOMETRY

    E-Print Network [OSTI]

    Albert, Loic

    We present detections of the near-infrared thermal emission of three hot Jupiters and one brown dwarf using the Wide-field Infrared Camera (WIRCam) on the Canada-France-Hawaii Telescope (CFHT). These include Ks-band secondary ...

  8. THE GAS DYNAMICS OF NGC 4472 REVEALED BY XMM-NEWTON

    E-Print Network [OSTI]

    Kraft, R. P.

    We present results from a 100 ks XMM-Newton observation of the hot gas in the Virgo cluster elliptical galaxy NGC 4472. We find a surface brightness discontinuity ~21 kpc north of the nucleus, consistent with being a contact ...

  9. Nicotinic cholinergic signaling determines the fate of adultborn neurons in the dentate gyrus of the hippocampus

    E-Print Network [OSTI]

    Campbell, Nolan Robert

    2010-01-01

    fewer spines in aggregate than do WTs and therefore may havecomplexity compared to WTs. KS statistical analysis of the?7KO neurons compared to WTs (Fig. 6B). This suggests that

  10. A New Foundation For Control-Dependence and Slicing for Modern Program Structures

    E-Print Network [OSTI]

    Banerjee, Anindya

    ) by Lockheed Martin, and by Intel Corporation. Manhattan KS, 66506, USA. {rvprasad] such as global scheduling, loop fusion, code motion etc. Intuitively, a program statement n1 is control

  11. A New Foundation For Control-Dependence and Slicing for Modern Program Structures

    E-Print Network [OSTI]

    Banerjee, Anindya

    ,CCR-0209205,ITR-0326577,CCR-0444167), by Lockheed Martin, and by Intel Corporation. Manhattan KS optimiza- tions [5] such as global scheduling, loop fusion, code motion etc. Intuitively, a program

  12. This list does not imply DOE endorsement of the individuals or...

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

    WI Amundson, Todd tmamundson@bpa.gov 503-230-5491 OR Anderson, Kevin kanderson@us.grundfos.com 913-227-3400 KS Andrus, Mindy mindyg.andrus@us.schneider-electric.com...

  13. Reflective Terahertz Imaging for early diagnosis of skin burn severity

    E-Print Network [OSTI]

    TEWARI, PRIYAMVADA

    2013-01-01

    Bennett, N. Bajwa, K.S. Barnett, R.S. Singh, M.O. Culjat, A.JL Bourgeois, Dr Kelly S Barnett, Dr JS Sayre and Dr Ioanna

  14. M1 GEOMETRIE -COURBES GAUCHES octobre 2011 Exercice 1 Considerons la courbe de R3

    E-Print Network [OSTI]

    Frabetti, Alessandra

    , param´etr´ee par l'abscisse curviligne s. On note t(s), n(s), b(s) le tri`edre de Fr´enet, k(s) la

  15. Courbes et surfaces. Devoir I. Exercice 0 : Montrer que le plan passant par trois points non co-lineaires pi, i = 1, 2, 3 a pour

    E-Print Network [OSTI]

    Menichi, Luc

    `ere de Fr´enet de C(s) avec celui de (s). Montrer que kC(s) = -k(s)3/k (s) et que RC(s) = R(s)R (s). En d

  16. A new quasi-exactly solvable problem and its connection with an anharmonic oscillator

    E-Print Network [OSTI]

    Da-Bao Yang; Fu-Lin Zhang; Jing-Ling Chen

    2010-11-30

    The two-dimensional hydrogen with a linear potential in a magnetic field is solved by two different methods. Furthermore the connection between the model and an anharmonic oscillator had been investigated by methods of KS transformation.

  17. J. K. Shultis (jks@ksu.edu)

    E-Print Network [OSTI]

    Shultis, J. Kenneth

    .4.1 The Surface Current Tally (type F1) . . . . . . . . . . . . . . . . . . . . . . 16 3.4.2 The Average Surface. of Mechanical and Nuclear Engineering Kansas State University Manhattan, KS 66506 (c) Copyright 2004­2011 All

  18. Menace and Management: Power in the Human-Monkey Social Worlds of Delhi and Shimla

    E-Print Network [OSTI]

    Solomon, Daniel Allen

    2013-01-01

    145–146. Narayanan, K.S. “Kerala Monkey Doubles up as ahttp://www.ibnlive.com/news/kerala-monkey-doubles-up-as-a-who guards a herd of goats in Kerala state is also worth

  19. Voters’ Initiatives to Repeal or Prevent Laws Prohibiting Employment Discrimination Against LGBT People, 1974-Present

    E-Print Network [OSTI]

    Sears, Brad; Mallory, Christy; Hunter, Nan D.

    2009-01-01

    Miami-Dade County, FL 2002 Tacoma, WA 2005 Topeka, KS 2009Failed Irvine, CA Athens, OH Tacoma, WA Wooster, OH Seattle,MI I Miami-Dade County, FL Tacoma, WA R I Westbrook, ME R

  20. X-RAY EJECTA KINEMATICS OF THE GALACTIC CORE-COLLAPSE SUPERNOVA REMNANT G292.0+1.8

    E-Print Network [OSTI]

    Bhalerao, Jayant

    We report on the results from the analysis of our 114 ks Chandra High Energy Transmision Grating Spectrometer observation of the Galactic core-collapse supernova remnant G292.0+1.8. To probe the three-dimensional structure ...

  1. PNNL-SA-84872

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

    Research Society, Pittsburgh, PA. Matlack, K.S., H. Gan, M. Chaudhuri, W.K. Kot, W. Gong, T. Bardakci, I.L. Pegg, and I. Joseph. 2008. Melt Rate Enhancement for High Aluminum...

  2. Microsoft Word - JMatyas_Empirical model of spinel settling.doc

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

    Waste Glass, Ceramic Transactions 119, 301-308 (2001). 6 K.S. Matlack, W.K. Kot, W. Gong, W. Lutze, I.L. Pegg, and I. Joseph, Effects of High Spinel and Chromium Oxide Crystal...

  3. bectcom-milli | netl.doe.gov

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

    Modifications at NYSEGs Milliken Station Units 1 and 2 (Oct 1993) B.L. Marker and E.G. Beckman, Joint ASMEIEEE Power Generation Conference, Kansas City, KS Estimates of Soil...

  4. Lancaster-Mineral Point folio, Wisconsin-Iowa-Illinois 

    E-Print Network [OSTI]

    Grant, U. S. (Ulysses Sherman), 1867-1932.

    1907-01-01

    Multiquip) Location CA IA NJ SC WI CAN CO GA ID IL KS TX Total Maquoketa 1 1 Atlanta 1 1 Boise 1 1 Carson 1 1 Cerritos 1 1...

  5. Embryonic and Larval Development of Sacramento Splittail Pogonichthys macrolepidotus

    E-Print Network [OSTI]

    Deng, Xin; Teh, Swee J.; Doroshov, Serge I.; Hung, Silas S. O.

    2012-01-01

    p. Moyle PB, Baxter RD, Sommer T, Foin TC, Mater SA. 2004.66:797–816. Feyrer F, Sommer TR, Baxter R. 2005. Spatial-KS): Allen Press. p 11–22. Sommer T, Baxter R, Herbold B.

  6. Sean Colbert-Kelly and Daniel Phillips

    E-Print Network [OSTI]

    2012-12-27

    where ks and kb represent the two dimensional splay and bend moduli for the film ... number of structural properties that lead to the first main result of the paper.

  7. Technical Note Engineering Soils Maps

    E-Print Network [OSTI]

    Technical Note Engineering Soils Maps PAUL M. SANTI Department of Geology and Geological, Suite 100, Overland Park, KS 66211 Key Terms: Engineering Properties, Soils, Hazards, Mapping INTRODUCTION For many applications, `engineering soils maps' may be preferable to comprehensive engineering

  8. Intelligence Sixth-generation Computer Technology Series. John Wiley, New York, pp. 211229.

    E-Print Network [OSTI]

    Yu, K.N.

    , Paul K.S. Lam b a Department of Physics and Materials Science, City University of Hong Kong, Tat Chee in some incidents) (Chen and Chou, 1998; also see review by Bricelj and Shumway, 1998). Paralytic

  9. Covalent Bonding in Actinide Sandwich Molecules

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

    by: S.G. Minasian (Los Alamos National Laboratory and Berkeley Lab); J.M. Keith, E.R. Batista, K.S. Boland, D.L. Clark, S.A. Kozimor, and R.L. Martin (Los Alamos National...

  10. ECONOMIC IMPACTS OF A WIDE AREA RELEASE OF ANTHRAX

    E-Print Network [OSTI]

    ECONOMIC IMPACTS OF A WIDE AREA RELEASE OF ANTHRAX May 2009 Prepared Regional Technology Center for Homeland Security Economic Impacts of a Wide Area Release of Anthrax KS .................................................................................................................................................. 1 Categories of Economic Impacts

  11. JETS IN e+e- ANNIHILATION

    E-Print Network [OSTI]

    Cooper, Susan Catherine.

    2010-01-01

    io U s, Data Monte Carlo, ~zz Jet Model Monte Carlo, - Phaseener-jy for data (points), jet model (solid curve) and pnaotAXIS The quarKs and hence the jet axis should have the same

  12. CHANDRA AND HST IMAGING OF THE QUASARS PKS B0106+013 AND 3C 345: INVERSE COMPTON X-RAYS AND MAGNETIZED JETS

    E-Print Network [OSTI]

    Kharb, P.

    We present results from deep (~70 ks) Chandra/ACIS observations and Hubble Space Telescope (HST) Advanced Camera for Surveys F475W observations of two highly optically polarized quasars belonging to the MOJAVE blazar sample, ...

  13. Symmetry-adapted perturbation theory with Kohn-Sham orbitals using non-empirically tuned, long-range-corrected density functionals

    SciTech Connect (OSTI)

    Lao, Ka Un; Herbert, John M.

    2014-01-28

    The performance of second-order symmetry-adapted perturbation theory (SAPT) calculations using Kohn-Sham (KS) orbitals is evaluated against benchmark results for intermolecular interactions. Unlike previous studies of this “SAPT(KS)” methodology, the present study uses non-empirically tuned long-range corrected (LRC) functionals for the monomers. The proper v{sub xc} (r)?0 asymptotic limit is achieved by tuning the range separation parameter in order to satisfy the condition that the highest occupied KS energy level equals minus the molecule's ionization energy, for each monomer unit. Tests for He{sub 2}, Ne{sub 2}, and the S22 and S66 data sets reveal that this condition is important for accurate prediction of the non-dispersion components of the energy, although errors in SAPT(KS) dispersion energies remain unacceptably large. In conjunction with an empirical dispersion potential, however, the SAPT(KS) method affords good results for S22 and S66, and also accurately predicts the whole potential energy curve for the sandwich isomer of the benzene dimer. Tuned LRC functionals represent an attractive alternative to other asymptotic corrections that have been employed in density-functional-based SAPT calculations, and we recommend the use of tuned LRC functionals in both coupled-perturbed SAPT(DFT) calculations and dispersion-corrected SAPT(KS) calculations.

  14. Statistical optimization for passive scalar transport: maximum entropy production vs maximum Kolmogorov-Sinay entropy

    E-Print Network [OSTI]

    Martin Mihelich; Berengere Dubrulle; Didier Paillard; Davide Faranda

    2015-05-26

    We derive rigorous results on the link between the principle of maximum entropy production and the principle of maximum Kolmogorov-Sinai entropy using a Markov model of the passive scalar diffusion called the Zero Range Process. We show analytically that both the entropy production and the Kolmogorov-Sinai entropy seen as functions of f admit a unique maximum denoted fmaxEP and fmaxKS. The behavior of these two maxima is explored as a function of the system disequilibrium and the system resolution N. The main result of this article is that fmaxEP and fmaxKS have the same Taylor expansion at _rst order in the deviation of equilibrium. We find that fmaxEP hardly depends on N whereas fmaxKS depends strongly on N. In particular, for a fixed difference of potential between the reservoirs, fmaxEP (N) tends towards a non-zero value, while fmaxKS (N) tends to 0 when N goes to infinity. For values of N typical of that adopted by Paltridge and climatologists we show that fmaxEP and fmaxKS coincide even far from equilibrium. Finally, we show that one can find an optimal resolution N_ such that fmaxEP and fmaxKS coincide, at least up to a second order parameter proportional to the non-equilibrium uxes imposed to the boundaries.

  15. CP-violation in $b \\to s$ Penguin Decays at BaBar

    E-Print Network [OSTI]

    BaBar Collaboration; Nitesh Soni

    2007-10-16

    We present the new and updated $BABAR$ measurements of CP-violation studies for many $b\\to s $ penguin decay modes. We report the first observation of mixing-induced CP-violation in $B^0 \\to \\eta ^{'} K^0$ with a significance (including systematic uncertainties) of 5.5$\\sigma$. We also present the first observation of the decay $B^0 \\to \\rho ^0 K^0$. Using the time-dependent Dalitz plot analysis of $B^0\\to K^+K^- K^0$ decay, the CP-parameters $\\mathcal A_{CP}$ and $\\beta_{eff}$ are measured with $4.8\\sigma$ significance, and we reject the solution near $\\pi /2 - \\beta_{eff}$ at $4.5\\sigma$. We also present the updated measurements of CP-violating parameters for $B^0 \\to K_S^0 \\pi ^0$, $K_S^0K_S^0K_S^0$ and $\\pi ^0 \\pi ^0 K_S^0$ decays. An updated measurements of the CP-violating charge asymmetries for $B^{\\pm}\\to \\eta ^{'} K^{\\pm}$, $\\eta K^{\\pm}$, $\\omega K^{\\pm}$ decays are also presented. The measurements are based on the data sample recorded at the $\\Upsilon (4S)$ resonance with $BABAR$ detector at the PEP-II $B$-meson Factory at SLAC.

  16. The Einstein-Hilbert action of the space of holomorphic maps from S^2 to CP^k

    E-Print Network [OSTI]

    L. S. Alqahtani

    2013-08-07

    Let $\\mathcal{H}_{n,k}(\\Sigma)$ be the space of degree $n\\geq 1$ holomorphic maps from a compact Riemann surface $\\Sigma $ to $\\mathbb{C}P^k$. In the case $\\Sigma=S^2$ and $n=1$, the $L^2$ metric on $\\mathcal{H}_{1,k}(S^2)$ was computed exactly by Speight. In this paper, the Ricci curvature tensor and the scalar curvature on $\\mathcal{H}_{1,k}(S^2)$ are determined explicitly for $k\\geq 2$. An exact direct computation of the Einstein-Hilbert action with respect to the $L^2$ metric on $\\mathcal{H}_{1,k}(S^2)$ is made and shown to coincide with a formula conjectured by Baptista.

  17. Perfect fluid tori orbiting Kehagias-Sfetsos naked singularities

    E-Print Network [OSTI]

    Stuchlík, Zden?k; Schee, Jan; Ku?áková, Hana

    2014-01-01

    We construct perfect fluid tori in the field of the Kehagias-Sfetsos (K-S) naked singularity representing spherically symmetric vacuum solution of the modified Ho\\v{r}ava quantum gravity that is characterized by a dimensionless parameter $\\omega M^2$, combining the gravitational mass parameter $M$ of the spacetime with the Ho\\v{r}ava parameter $\\omega$ reflecting the role of the quantum corrections. In dependence on the value of $\\omega M^2$, the K-S naked singularities demonstrate a variety of qualitatively different behavior of their circular geodesics that is fully reflected in the properties of the toroidal structures. In all of the K-S naked singularity spacetimes the tori are located above an "antigravity" sphere where matter can stay in stable equilibrium position, that is relevant for the stability of the orbiting fluid toroidal accretion structures.

  18. Decays of ? leptons to final states containing K(0)S mesons

    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

    1996-06-01

    present branching fractions for decays to five final states: t 2!K0h2n t , t 2!K0h2p0n t , t 2!K0K2n t , t 2!K0K2p0n t , and t2!KS0KS0h2nt , where K0h2 de- notes the sum of the processes involving K¯0p2 and K0K2 particle combinations. Substructure and mass... systematic errors. For other modes, selection criteria are less stringent for higher acceptance. A sample of t2!KS0h2nt events is selected by requiring four charged tracks, each with momentum transverse to the beam axis pT.0.05Ebeam and ucosuu,0.8, where u...

  19. On quadratic derivative Schrödinger equations in one space dimension

    E-Print Network [OSTI]

    Stefanov, Atanas G.

    2007-02-23

    ??xv?L?). License or copyright restrictions may apply to redistribution; see http://www.ams.org/journal-terms-of-use 3594 A. STEFANOV More generally, for every j ? Z, we have ? ? ? k?j 22ks ? ?Ek(u, v) ? ? 2 L2 ? ? 1/2 #1; ?P>j?3ux?L??v?H?s + ?ux?L??P>j?3v?H?s + ?P... 22ks?vk?1?·?k+1?2L2 ? ? 1/2 ? ?ux?L??v>j?3?H?s . The next two terms in (2.1) are similar, so we just discuss one of them. To obtain the desired estimate for the term ? ? ? ? k?j 22ks ? ? ? ? ? ? Pk( ? l?k?2 ul?xvl?2?·?l+2) ? ? ? ? ? ? 2 L2 ? ? ? 1...

  20. Progress at the interface of wave-function and density-functional theories

    SciTech Connect (OSTI)

    Gidopoulos, Nikitas I.

    2011-04-15

    The Kohn-Sham (KS) potential of density-functional theory (DFT) emerges as the minimizing effective potential in a variational scheme that does not involve fixing the unknown single-electron density. Using Rayleigh Schroedinger (RS) perturbation theory (PT), we construct ab initio approximations for the energy difference, the minimization of which determines the KS potential directly - thereby bypassing DFT's traditional algorithm to search for the density that minimizes the total energy. From second-order RS PT, we obtain variationally stable energy differences to be minimized, solving the severe problem of variational collapse of orbital-dependent exchange-correlation functionals based on second-order RS PT.

  1. Diversity Outlook

    E-Print Network [OSTI]

    2012-02-01

    continues; a special issue of Diversity Outlook will provide details. The Emily Taylor Women’s Resource Center and the Office of Multicultural Affairs, who now report to the Office of Diversity & Equity, are busy working on updating mission statements...:15, Sabatini MRC Feb. 13, 1:00, Centennial Rm, KS Union Feb. 16, 1:00, English Room, KS Union Read the KU ADA review here. DIVERSITY OUTLOOK • THE NEWSLETTER OF CAMPUS DIVERSITY FEBRUARY 2012VOL. 3 • ISSUE 6 THE SCHOLARSHIP OF DIVERSITY: A SYNOPSIS Students...

  2. Quantum chaos on discrete graphs

    E-Print Network [OSTI]

    Uzy Smilansky

    2007-04-26

    Adapting a method developed for the study of quantum chaos on {\\it quantum (metric)} graphs \\cite {KS}, spectral $\\zeta$ functions and trace formulae for {\\it discrete} Laplacians on graphs are derived. This is achieved by expressing the spectral secular equation in terms of the periodic orbits of the graph, and obtaining functions which belongs to the class of $\\zeta$ functions proposed originally by Ihara \\cite {Ihara}, and expanded by subsequent authors \\cite {Stark,Sunada}. Finally, a model of "classical dynamics" on the discrete graph is proposed. It is analogous to the corresponding classical dynamics derived for quantum graphs \\cite {KS}.

  3. High-energy monitoring of Seyfert galaxies: the case of NGC 4593

    E-Print Network [OSTI]

    Ursini, F; Matt, G; Bianchi, S; Cappi, M; De Marco, B; De Rosa, A; Malzac, J; Ponti, G

    2015-01-01

    We discuss preliminary results from a joint XMM-Newton and NuSTAR monitoring program on the active galactic nucleus NGC 4593, consisting of 5x20 ks observations, spaced by two days, performed in January 2015. The source is found to be variable, both in flux and spectral shape, on time scales as short as a few ks. The spectrum clearly softens when the source brightens. A simple timing analysis suggests the presence of a variable soft excess that correlates with the primary continuum.

  4. Rock Chalk Report, January 2, 2013

    E-Print Network [OSTI]

    2013-01-02

    to Start @ 3:30 PM (Central) on Jan. 6 Jayhawks and Owls to play on CBS. UPCOMING EVENTS 1.02 W. Basketball vs Kansas State 7 PM @ Lawrence, KS 01.05 Track Bill Easton Classic 1 PM @ Lawrence, KS 01.06 M. Basketball vs Temple 3... as $50! Earn two Williams Education Fund Priority Points per sport when you buy Baseball and Softball season tickets! Women's Basketball Women's Basketball Tickets On Sale Purchase the Big 12 Pack which includes all nine home...

  5. Lyapunov exponents and Kolmogorov-Sinai entropy for a high-dimensional convex billiard

    SciTech Connect (OSTI)

    Papenbrock, Thomas [Institute for Nuclear Theory, Department of Physics, University of Washington, Seattle, Washington 98195 (United States)] [Institute for Nuclear Theory, Department of Physics, University of Washington, Seattle, Washington 98195 (United States)

    2000-02-01

    We compute the Lyapunov exponents and the Kolmogorov-Sinai (KS) entropy for a self-bound N-body system that is realized as a convex billiard. This system exhibits truly high-dimensional chaos, and 2N-4 Lyapunov exponents are found to be positive. The KS entropy increases linearly with the numbers of particles. We examine the chaos generating defocusing mechanism and investigate how high-dimensional chaos develops in this system with no dispersing elements. (c) 2000 The American Physical Society.

  6. Academic Motherhood: Managing Complex Roles in Research Universities

    E-Print Network [OSTI]

    Ward, Kelly; Wolf-Wendel, Lisa E.

    2004-01-01

    38 1 19 months KSB Research 34 1 2 KS Research 35 1 18 months AP Research 36 2 4 LB Research 37 1 17 months Social Sciences CR Research 35 1 4 TH Research 32 1 21 months SS AAU member 33 1 10 months JC Research 35 1 3 Science, English, Math, Medicine... 38 1 19 months KSB Research 34 1 2 KS Research 35 1 18 months AP Research 36 2 4 LB Research 37 1 17 months Social Sciences CR Research 35 1 4 TH Research 32 1 21 months SS AAU member 33 1 10 months JC Research 35 1 3 Science, English, Math, Medicine...

  7. Light hadron spectrum---MILC results with the Kogut-Susskind and Wilson actions

    E-Print Network [OSTI]

    MILC Collaboration; Claude Bernard; Tom Blum; Carleton DeTar; Steven Gottlieb; Urs M. Heller; Jim Hetrick; Craig McNeile; Kari Rummukainen; Bob Sugar; Doug Toussaint; Matthew Wingate

    1997-07-15

    We present the current status of our ongoing calculations of the light hadron spectrum with both Kogut-Susskind (KS) and Wilson quarks in the valence or quenched approximation. We discuss KS quarks first and find that the chiral extrapolation is potentially the biggest source of systematic error. For the Wilson case, we focus on finite volume and source size effects at 6/g^2=5.7. We find no evidence to support the claim that there is a finite volume effect between N_s=16 and 24 of approximately 5%.

  8. 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 ...

  9. Noise Induced State Transitions, Intermittency, and Universality in the Noisy Kuramoto-Sivashinksy Equation

    E-Print Network [OSTI]

    Pavliotis, Grigorios

    Noise Induced State Transitions, Intermittency, and Universality in the Noisy Kuramoto the effect of pure additive noise on the long-time dynamics of the noisy Kuramoto- Sivashinsky (KS) equation close to the instability onset. When the noise acts only on the first stable mode (highly degenerate

  10. Name of Module: Next Generation Network Project 1

    E-Print Network [OSTI]

    Wichmann, Felix

    Name of Module: Next Generation Network ­ Project 1 CP (ECTS): 9 Short Name: MINF-KS-AV/PJ1.W12 circuit-switched telecommunication networks, IP based Next Generation Networks (NGNs). Furthermore already known topics from the modules ,,Offene Kommunikationssystem" or "Next Generation Networks - Basis

  11. Name of Module: Next Generation Network Project 2

    E-Print Network [OSTI]

    Wichmann, Felix

    Name of Module: Next Generation Network ­ Project 2 CP (ECTS): 9 Short Name: MINF-KS-AV/PJ2.W12 circuit-switched telecommunication networks, IP based Next Generation Networks (NGNs). Furthermore already known topics from the modules ,,Offene Kommunikationssystem" or "Next Generation Networks - Basis

  12. SCHOOL OF MEDICINE YEAR III CURRICULUM GUIDE

    E-Print Network [OSTI]

    Finley Jr., Russell L.

    1 SCHOOL OF MEDICINE YEAR III CURRICULUM GUIDE WAYNE STATE UNIVERSITY SCHOOL OF MEDICINE 2015-2016 Clinical Curriculum Guide 2015 -2016 Revised 06/23/15 KS/SET #12;2 Table of Contents A MESSAGE FROM ....................................................................................... 11 Overview of the Clinical Curriculum ...................................................... 11

  13. Feasibility, Challenges, and Performance of Wireless Multi-Hop Routing for Feeder Level Communication in a

    E-Print Network [OSTI]

    Namboodiri, Vinod

    will also aid in better energy management and tariff-related information. The motivation for this paper Communication in a Smart Grid Babak Karimi Electrical Engineering and Computer Science Wichita State University Science, Wichita State University, KS, USA ward.jewell @wichita.edu ABSTRACT In a Smart Grid communication

  14. Temperature dependence of the elastic constants of solid and liquid Cd0.96Zn0.04Te obtained by laser ultrasound

    E-Print Network [OSTI]

    Wadley, Haydn

    infrared focal plane array IRFPA sensors.1­3 As the size of imaging detectors continues to increase, a need a complete evaluation of the temperature dependent single crystal elastic stiffness constants C11 , C12 , C44 for the solid and the adiabatic bulk modulus (KS) for the liquid. In addition, evaluation of the thermoelastic

  15. Thermal stability of the nanocrystalline FeCoHfBCu alloy Hirofumi Iwanabe

    E-Print Network [OSTI]

    Laughlin, David E.

    rate of 0.167 K/s. The heat flow was moni- tored and heating was suspended just after magnetic materials for high temperature applications. Four samples were obtained in annealed or as-spun ribbons with x 0,0.10,0.30,0.44. Magnetic properties and thermal stability were studied focusing on the x

  16. Anion ordering and lattice expansion in (TMTSF)2ClO4 C. Gaonach, G. Creuzet and C. Noguera

    E-Print Network [OSTI]

    Boyer, Edmond

    in which superconductivity at ambient pressure was ob- served at 1.3 K by resistivity measurements [1/min, relaxed state) leads to superconductivity while a fast cooling (typically 2 K/s, quenched state) leads by the superstructure peak intensity [8]. It has been shown that in such intermediate states the superconducting and SDW

  17. HARDY-TYPE INEQUALITIES FOR A NEW CLASS OF INTEGRAL OPERATORS

    E-Print Network [OSTI]

    Sinnamon, Gordon J.

    investigated with success. One of the general results in this direction, begun by Martin-Reyes and Sawyer [4- eralized Hardy Operators: The operator f s 0 k(s, t)f(t) dt is a GHO provided 1991 Mathematics Subject operator. Support from the Natural Sciences and Engineering Research Council of Canada is gratefully

  18. Elliott Cheu University of Arizona

    E-Print Network [OSTI]

    Fay, Noah

    of Direct CP Violation in KS,L Decays", A. Alavi-Harati et al., Physical Review Letters 83, 22-32 (1999-921 (1999). 7. A. Alavi-Harati et al. "Measurements of Direct CP Violation, CPT Symmetry, and Other, 2008-present. P-20 Education Council of Southern Arizona, 2008-present. TRIF Workforce Development

  19. Modeling Bystander Effects Using a Microdosimetric ApproachModeling Bystander Effects Using a Microdosimetric Approach R.D. Stewart, E.J. Ackerman, J.K. Shultis*, and X.C. Lei

    E-Print Network [OSTI]

    Shultis, J. Kenneth

    Dose Radiation Research Program grant to the Pacific Northwest National Laboratory (PNNL) from the U there is increasing evidence that bystander effects play a role in low dose radiation responses, few models have been Laboratory, Richland, WA 99352 * Kansas State University, Manhattan, KS 66506 Research supported by a Low

  20. SUMMER, 2006 65 PEER REVIEWED

    E-Print Network [OSTI]

    Watson, Craig A.

    in treatments for a pen of cattle, death loss increased by 0.143%. A 10% treatment rate would equate to a 1- mance des bovins en engraissement. Introduction The cattle feeding industry in the United States, FL 32610 2 Department of Agricultural Economics, Kansas State University, Manhattan, KS 66506 3

  1. Guideline and Recommended Standard for

    E-Print Network [OSTI]

    , Hampton, VA Vice Chair: Joseph H. Boardman, Commissioner, New York State DOT Executive Director: Robert E SARAH C. CAMPBELL, President, TransManagement, Inc., Washington, DC E. DEAN CARLSON, Director, Carlson Associates, Topeka, KS JOHN L. CRAIG, Director, Nebraska Department of Roads DOUGLAS G. DUNCAN, President

  2. Tips for Travelers When State Funds Are Used University of Kansas Procurement Services Tips for Travelers When State Funds Are Used

    E-Print Network [OSTI]

    Card (BTC). The State of Kansas has contracted with UMB Bank to provide personal credit cards://admin.ks.gov/offices/procurement-and- contracts/personal-credit-cards/. The BTC and its use is the personal responsibility of the employee to whom the card is issued. The State and University accept no responsibility for its misuse. Employees with a BTC

  3. FAILURE OF ZIRCALOY-4 SHEET CONTAINING HYDRIDE BLISTERS O.N. Pierron1

    E-Print Network [OSTI]

    Motta, Arthur T.

    FAILURE OF ZIRCALOY-4 SHEET CONTAINING HYDRIDE BLISTERS O.N. Pierron1 , D.A. Koss1 , A.T. Motta2 , R.S. Daum3 , and K.S. Chan4 1 Dept. Materials Science and Engineering, Penn State Univ., University Park, PA 16802 2 Dept. Mechanical and Nuclear Engineering, Penn State University, University Park, PA

  4. The influence of hydride blisters on the fracture of Zircaloy-4 O.N. Pierron a

    E-Print Network [OSTI]

    Motta, Arthur T.

    The influence of hydride blisters on the fracture of Zircaloy-4 O.N. Pierron a , D.A. Koss a,*, A.T. Motta b , K.S. Chan c a Department of Materials Science and Engineering, Pennsylvania State University Engineering, Pennsylvania State University, University Park, PA 16802, USA c Southwest Research Institute, San

  5. Research Article Habitat Use and Survival of Preflight Wild Turkey Broods

    E-Print Network [OSTI]

    Wallace, Mark C.

    Research Article Habitat Use and Survival of Preflight Wild Turkey Broods BRIAN L. SPEARS,1 Leasure Hall, Kansas State University, Manhattan, KS 66506, USA ABSTRACT Wild turkey (Meleagris gallopavo. This is a critical period of wild turkey life history, with poult survival ranging from 12% to 52%. We measured

  6. Applicability of 2-D Time-Lapse High-Resolution Seismic Reflection Approach to Image Natural Salt-Dissolution and Subsidence in Central Kansas and Improved Post-Processed Vibroseis Data Characteristics

    E-Print Network [OSTI]

    Rice, Daniel

    2009-01-12

    acquired in 2001 across an active subsidence feature. Seismic reflection data were acquired in both 2001 and 2008 across an active sinkhole at the intersection of U.S. Highway 50 and Victory Road in Hutchinson, KS as part of a comprehensive study...

  7. Class IA Phosphoinositide 3-Kinase Modulates Basal Lymphocyte Motility in the Lymph Node1

    E-Print Network [OSTI]

    Parker, Ian

    Class IA Phosphoinositide 3-Kinase Modulates Basal Lymphocyte Motility in the Lymph Node1 Melanie P of the class IA PI3K regulatory subunits p85 and p85 also exhibited reduced velocities, with the magnitude show, for the first time, that class IA PI3Ks play an important role in regulating basal lymphocyte

  8. CHANDRA X-RAY SPECTROSCOPY OF THE FOCUSED WIND IN THE CYGNUS X-1 SYSTEM. I. THE NONDIP SPECTRUM IN THE LOW/HARD STATE

    E-Print Network [OSTI]

    Hanke, Manfred

    We present analyses of a 50 ks observation of the supergiant X-ray binary system Cygnus X-1 (Cyg X-1)/HDE226868 taken with the Chandra High Energy Transmission Grating Spectrometer (HETGS). Cyg X-1 was in its spectrally ...

  9. Concept : Cell Yield Glucose, mM

    E-Print Network [OSTI]

    Málaga, Universidad de

    on Limiting Substrate. Specific growth rate reaches a maximum value of 0.5 h-1. Value of KS here is 0.5 g L-1 body, degeneration) Limitation in the length of cDNA Lacks post-translational modification específico (Baculovirus) Cultivo fastidioso Tiempo de crecimiento my lento (tiempo de doblaje es 20h) #12

  10. PASJ: Publ. Astron. Soc. Japan 60, 849856, 2008 August 25 c 2008. Astronomical Society of Japan.

    E-Print Network [OSTI]

    Pak, Soojong

    =pixel. We adopt an Offner relay optical system, which provides a cold stop to eliminate thermal results from test observations, the limiting magnitudes are J = 17.6, H = 17.5, Ks = 16.1, and L in the second year. In the final year, system construction and inte- gration tests were performed

  11. Characterization of Microvascular-Based Self-healing Coatings

    E-Print Network [OSTI]

    Sottos, Nancy R.

    Characterization of Microvascular-Based Self-healing Coatings K.S. Toohey & N.R. Sottos & S Abstract A protocol is described to assess self-healing of crack damage in a polymer coating deposited on a substrate containing a microvascular network. The bio-inspired coating/substrate design delivers healing

  12. untitled

    Gasoline and Diesel Fuel Update (EIA)

    MN, WI, ND, SD OK, KS, MO Total Liquefied Refinery Gases 382 8 390 2,072 157 116 2,345 EthaneEthylene 10 0 10 0 0 0 0 Ethane 0 0 0 0 0 0 0 Ethylene 10 0 10 0 0 0 0 Propane...

  13. untitled

    Annual Energy Outlook [U.S. Energy Information Administration (EIA)]

    WI, ND, SD OK, KS, MO Total Liquefied Refinery Gases 331 -18 313 2,398 -147 -220 2,031 EthaneEthylene 12 0 12 0 0 0 0 Ethane 0 0 0 0 0 0 0 Ethylene 12 0 12 0 0 0 0 Propane...

  14. PSA Vol 1 Tables Revised Ver 2 Print.xls

    Annual Energy Outlook [U.S. Energy Information Administration (EIA)]

    OK, KS, MO Total Liquefied Refinery Gases 14,825 298 15,123 33,928 1,840 2,446 38,214 EthaneEthylene 107 0 107 0 0 0 0 Ethane 0 0 0 0 0 0 0 Ethylene 107 0 107 0 0 0 0 Propane...

  15. Longitudinal assessment of global and regional atrophy rates in Alzheimer's disease and dementia with Lewy bodies

    E-Print Network [OSTI]

    Mak, Elijah; Su, Li; Williams, Guy B.; Watson, Rosie

    2015-02-07

    dementia using serial magnetic resonance imaging. Mov. Disord. 20 (12), 1571–1576. http://dx.doi.org/10.1002/mds.2065216116613. Cover, K.S., van Schijndel, R.A., van Dijk, B.W., Redolfi, A., Knol, D.L., Frisoni, G.B., Barkhof, F., Vrenken, H., neu...

  16. untitled

    Annual Energy Outlook [U.S. Energy Information Administration (EIA)]

    September 2005 East Coast Appalachian No. 1 Total IN, IL, KY MN, WI, ND, SD OK, KS, MO Total Liquefied Refinery Gases 0.7 0.3 0.7 2.9 1.3 0.5 2.2 Finished Motor Gasoline a 47.9...

  17. On Quality-of-Service and Energy Consumption Tradeoffs in FEC-Encoded Audio Streaming

    E-Print Network [OSTI]

    McKinley, Philip K.

    On Quality-of-Service and Energy Consumption Tradeoffs in FEC-Encoded Audio Streaming Z. Zhou, P. KS 2004), Mon- treal, Canada, June 2004. Abstract This paper addresses the energy consumption of for- ward streams are multicast to mobile computers across a WLAN. Results of these experiments quantify the trade

  18. CX-100179 Categorical Exclusion Determination

    Office of Energy Efficiency and Renewable Energy (EERE)

    Wind Energy Technology Project and Renewable Energy Center of Excellence Award Number: DE-FG36-08GO88013 CX(s) Applied: B5.18 Wind Program Date: 01/26/2015 Location(s): KS Office(s): Golden Field Office

  19. Level MSc 2013/14 Nanoscience to Nanotechnology

    E-Print Network [OSTI]

    Martin, Ralph R.

    Level MSc 2013/14 Nanoscience to Nanotechnology MSc Nanoscience to Nanotechnology Coordinator: Dr Nanoscale Structures and Devices 10 Credits Mr. TGG Maffeis/Dr. L Li/Dr. KS Teng EGNM02 Soft Nanotechnology Nano(geno)toxicology 10 Credits Dr. SH Doak EGNM05 Bio-nanotechnology 10 Credits Dr. CJ Wright PM-M23

  20. The Potential of Compression to Improve Memory System Performance, Power Consumption, and Cost

    E-Print Network [OSTI]

    Mahapatra, Nihar R.

    The Potential of Compression to Improve Memory System Performance, Power Consumption, and Cost {mahapatr, jliu3, ks48}@cse.buffalo.edu {srinivas.dangeti, balakrishna.venkatrao}@eng.sun.com Abstract of information), at low power, and cost-effectively. This paper comprehensively an- alyzes the redundancy

  1. TTDTTC^/TTN MS#-R-68I Danish Calculations of

    E-Print Network [OSTI]

    »Reactor« Calculations on Assembly Basis 10 3.4 Fin Power Reconstruction 11 4Res*ks 13 4.1 Cl;1 Introduction Thebenchmark is described in NEACRP-L-33*. Så efferent .reactor, coo- figwations are considered,which togetherwith a numberofcodes based on different principles (nodal expansion, nKshcenocs or mesh coroen bawd

  2. Fog and Soil Weathering as Sources of Nutrients in a California Redwood Forest

    E-Print Network [OSTI]

    265 Fog and Soil Weathering as Sources of Nutrients in a California Redwood Forest Holly A. Ewing,1. Firestone,4 and Vanessa K.S. Boukili5 Abstract Fog water deposition is thought to influence the ecological from fog and rain, as well as the fate of these inputs, within a Sonoma County, California, coast

  3. Discussion by Matthew J. Kotchen (Yale University and NBER) of "Carbon Prices and Automobile Greenhouse Gas Emissions: The Extensive and Intensive Margins," by

    E-Print Network [OSTI]

    Kotchen, Matthew J.

    ) helps us understand how a carbon price that affects the price of gasoline is likely to impact decisions about automobile use. In particular, KS consider how the price of gasoline affects decisions about when Check. They find that when gasoline prices are higher, vehicles with relatively low fuel efficiency

  4. Letter to the Editor Comment on: "Electricity generation by Enterobacter cloacae

    E-Print Network [OSTI]

    less microbial fuel cell" by Samrot et al. The authors have conducted two-chamber microbial fuel cell, Rajalakshmi N, Dhathathreyan KS. Electricity generationby enterobacter cloacae su-1 in mediator less microbial fuel cell. Int J Hydrogen Energy 2010;35:7723e9. [2] Rezaei F, Xing D, Wagner R, Regan JM, Richard TL

  5. COE March 4, 2009 Fractal Point Events in Physics, Biology,

    E-Print Network [OSTI]

    Teich, Malvin C.

    -CONVERSION: ENTANGLED PHOTONS Laser c(2) Crystal Signal Idler Pump kr wr r ks ws s ki wi i wr = ws + wi RANDOM POINT EVENTS IN NEUROPHYSIOLOGY WHAT ARE THE COUNTING STATISTICS OF THESE POINT EVENTS? #12;COE ­ March 4, 2009 COUNTING STATISTICS FOR POINT EVENTS IN THE MAMMALIAN AUDITORY SYSTEM Eighth

  6. ICALP 2004 Page 1 July 2004 Model CheckingModel Checking

    E-Print Network [OSTI]

    Rajamani, Sriram K.

    ICALP 2004 Page 1 July 2004 Model CheckingModel Checking with Multiwith Multi--Valued LogicsBell Laboratories, Lucent Technologies #12;ICALP 2004 Page 2 July 2004 MultiMulti--Valued Model Checking: Definition") returns a value in L. ­ Example: [(K,s0) p EX p] = (c (d b)) = b s0 p = c p = d p = b #12;ICALP 2004

  7. Stability of the numerical method of solving the 3D inverse scattering problem with fixed-energy data

    E-Print Network [OSTI]

    with fixed-energy data A G Ramm Mathematics Department, Kansas State University, Manhattan, KS 66506, USAStability of the numerical method of solving the 3D inverse scattering problem with fixed- energy data This article has been downloaded from IOPscience. Please scroll down to see the full text article

  8. **FULL TITLE** ASP Conference Series, Vol. **VOLUME**, **YEAR OF PUBLICATION**

    E-Print Network [OSTI]

    Linsky, Jeffrey L.

    of Colorado and National Institute of Standards and Technology, Boulder, CO 80309­0440, USA Marc Gagn Abstract. We report on Chandra ACIS­I observations of the Eagle Nebula containing the young Galactic). On 2001 July 30--31, we obtained a 78 ks exposure of the Eagle Nebula with the ACIS­I instrument

  9. SHORT REVIEW Ecological genomics: understanding gene and

    E-Print Network [OSTI]

    Herman, Mike

    SHORT REVIEW Ecological genomics: understanding gene and genome function in the natural environment MC Ungerer, LC Johnson and MA Herman Division of Biology, Ecological Genomics Institute, Kansas State University, Manhattan, KS, USA The field of ecological genomics seeks to understand the genetic mechanisms

  10. From Frster resonance energy transfer to coherent resonance energy transfer and back

    E-Print Network [OSTI]

    Govindjee

    -mail:gov@illinois.edu ABSTRACT Photosynthesis converts solar energy into chemical energy. It provides food and oxygen; andFrom Förster resonance energy transfer to coherent resonance energy transfer and back A wheen o@ks.uiuc.edu * (invited and corresponding author) Department of Biochemistry, Department of Plant Biology, and Center

  11. Temperature-to-Power Mapping Zhenyu Qi, Brett H. Meyer, Wei Huang, Robert J. Ribando, Kevin Skadron, Mircea R. Stan

    E-Print Network [OSTI]

    Huang, Wei

    -SILICON POWER MAPS The "power wall" has become a critical performance lim- iter for integrated circuit designTemperature-to-Power Mapping Zhenyu Qi, Brett H. Meyer, Wei Huang§, Robert J. Ribando, Kevin, bhm, rjr, ks7h, mircea}@virginia.edu , §huangwe@us.ibm.com Abstract-- Accurate power maps are useful

  12. De Muyt, A., Jessop, L., Kolar, E., Sourirajan, A., Chen, J., Dayani, Y., and Lichten, M. (2012). Mol.

    E-Print Network [OSTI]

    Gibson, Matt

    2012-01-01

    California Institute of Technology, Pasadena, CA 91125, USA 2Stowers Institute for Medical Research, Kansas City, KS 66160, USA *Correspondence: mg2@stowers.org DOI 10.1016/j.cell.2012.03.019 In both plants-rate heterogeneity. Genetic methods have been extraordi- narily powerful for the functional dis- section

  13. Hierarchy of model Kohn–Sham potentials for orbital-dependent functionals: A practical alternative to the optimized effective potential method

    SciTech Connect (OSTI)

    Kohut, Sviataslau V.; Staroverov, Viktor N.; Ryabinkin, Ilya G.

    2014-05-14

    We describe a method for constructing a hierarchy of model potentials approximating the functional derivative of a given orbital-dependent exchange-correlation functional with respect to electron density. Each model is derived by assuming a particular relationship between the self-consistent solutions of Kohn–Sham (KS) and generalized Kohn–Sham (GKS) equations for the same functional. In the KS scheme, the functional is differentiated with respect to density, in the GKS scheme—with respect to orbitals. The lowest-level approximation is the orbital-averaged effective potential (OAEP) built with the GKS orbitals. The second-level approximation, termed the orbital-consistent effective potential (OCEP), is based on the assumption that the KS and GKS orbitals are the same. It has the form of the OAEP plus a correction term. The highest-level approximation is the density-consistent effective potential (DCEP), derived under the assumption that the KS and GKS electron densities are equal. The analytic expression for a DCEP is the OCEP formula augmented with kinetic-energy-density-dependent terms. In the case of exact-exchange functional, the OAEP is the Slater potential, the OCEP is roughly equivalent to the localized Hartree–Fock approximation and related models, and the DCEP is practically indistinguishable from the true optimized effective potential for exact exchange. All three levels of the proposed hierarchy require solutions of the GKS equations as input and have the same affordable computational cost.

  14. 2nd Reading November 9, 2010 12:19 WSPC/140-IJMPB 05607

    E-Print Network [OSTI]

    propose in this paper a new method for creating materials with a desired refraction coefficient. We use Vol. 24, No. 00 (2010) 1­8 c World Scientific Publishing Company A METHOD FOR CREATING MATERIALS, KS 66506-2602, USA ramm@math.ksu.edu Received 6 January 2010 It is proposed to create materials

  15. United States Department of

    E-Print Network [OSTI]

    Estimated UseofWaterintheUnitedStatesin2005 Trends in estimated water use in the United States.L., Hutson, S.S., Linsey, K.S., Lovelace, J.K., and Maupin, M.A., 2009, Estimated use of water in the United

  16. Eliot Quataert (UC Berkeley) Spitzer's view of Carina

    E-Print Network [OSTI]

    Wurtele, Jonathan

    ... · Feedback 101: Energy vs Momentum · Feedback during 1. Star Formation (KS, Galactic Winds, Clumps, ..) 2. BH Growth (MBH-,Winds, ..) #12;What is it Good For? Kennicutt 1998 Slowing Down Star Formation in Galaxies & then unbound eg: solar wind SN-heated galactic wind Momentum (dense gas; energy radiated) force induces V

  17. Kheshbn No. 150 - Fall 2007 - Journal

    E-Print Network [OSTI]

    2007-01-01

    p"2nir po-25 pn is - jnaru o"n nx^pv .D :Ö"rWT JÖ055 DIS Tb-T ..TV nyr ? nx^pt? .o cm^mjn) ..^"inyi *vvf? »v ÜKH nonte-o^yi3 nyo"nx iyi -IKS onxn osyboasy-iKs ,

  18. Entertainment Technology Center, CMU Internship Survey Results, Dec 2014 and May 2015

    E-Print Network [OSTI]

    Interviews Arranged by Career Services 12 Intern Search/Company Websites 9 Alumni Contacts 6 West Coast Trip, MS, NC, PR, SC, TN 2 / 4% Midwest: IA, IL, IN, KS, MI, MN, MO, ND, NE, OH, SD, WI 2 / 4% Northwest

  19. Hydraulic adjustment of Scots pine across Europe J. Martnez-Vilalta1,2

    E-Print Network [OSTI]

    Mencuccini, Maurizio

    Research Hydraulic adjustment of Scots pine across Europe J. Martínez-Vilalta1,2 , H. Cochard3), 8903 Birmensdorf, Switzerland Summary · The variability of branch-level hydraulic properties, xylem anatomy, sapwood- and leaf-specific hydraulic conductivity (KS and KL), vulnerability to embolism

  20. Moderately to Poorly Welded Tuff, Bishop, California: Geophysical and Geological Characterization to Determine the Source of Radar

    E-Print Network [OSTI]

    Stillman, David E.

    Research Council Decadal Study on Terrestrial Analogs to Mars recommended the Bishop Tuff exposed and should provide fluid pathways to pond percolating water or promote conduit flow. Discrete, subhorizontal. et al. (2001) NRC Decadal Study of Terrestrial Analogs to Mars. [2] Edgett, K.S. et al. (1997) JGR

  1. Long-wave instabilities and saturation in thin film equations

    E-Print Network [OSTI]

    Pugh, Mary

    to shorter wavelengths which then dissipate the energy. The nonlinearity in the KS equation is advective.2) The equation arises as an interface model in bio-fluids [15], solar convec- tion [19], and binary alloys [48Long-wave instabilities and saturation in thin film equations A. L. Bertozzi Department

  2. Longwave instabilities and saturation in thin film equations

    E-Print Network [OSTI]

    Pugh, Mary

    then dissipate the energy. The nonlinearity in the KS equation is advective, and a#ects the dy­ namics di.2) The equation arises as an interface model in bio­fluids [15], solar convec­ tion [19], and binary alloys [48Long­wave instabilities and saturation in thin film equations A. L. Bertozzi Department

  3. Communication: Embedded fragment stochastic density functional theory Daniel Neuhauser, Roi Baer, and Eran Rabani

    E-Print Network [OSTI]

    Rabani, Eran

    Communication: Embedded fragment stochastic density functional theory Daniel Neuhauser, Roi Baer (2014) Communication: Embedded fragment stochastic density functional theory Daniel Neuhauser,1,a) Roi­18 Recently, we formulated KS-DFT as a statistical theory in which the electron density is determined from

  4. Int. J. Environ. Res. Public Health 2014, 11, 11627-11644; doi:10.3390/ijerph111111627 International Journal of

    E-Print Network [OSTI]

    Sheridan, Scott

    exceeded deaths by car accidents in the United States [5,6]. In addition to emotional impacts, suicide.mdpi.com/journal/ijerph Article Association of Weekly Suicide Rates with Temperature Anomalies in Two Different Climate Types P. Ellis 4 and Scott C. Sheridan 5 1 Department of Geosciences, Fort Hays State University, Hays, KS 67601

  5. Coupling of Fluid Flow and Deformation in Underground Formations

    E-Print Network [OSTI]

    This paper demonstrates the necessity of using the coupled Biot's equations for deformation-flow problems in ..... For most soils Ks is much larger than the bulk modulus K of .... Due to the stiffness and bending of the overburden, the reservoir.

  6. HIGH-RESOLUTION X-RAY SPECTROSCOPY REVEALS THE SPECIAL NATURE OF WOLF-RAYET STAR WINDS

    E-Print Network [OSTI]

    Oskinova, L. M.

    We present the first high-resolution X-ray spectrum of a putatively single Wolf-Rayet (WR) star. 400 ks observations of WR 6 by the XMM-Newton telescope resulted in a superb quality high-resolution X-ray spectrum. Spectral ...

  7. Regional Report Issue Paper

    E-Print Network [OSTI]

    Garfunkel, Eric

    South Atlantic Delaware, Florida, Georgia, Maryland, North Carolina, South Carolina, Virginia, West Virginia [The District of Columbia is part of this division but is not included in the analysis Nebraska SD South Dakota KS Kansas MN Minnesota IA Iowa MO Missouri WI Wisconsin IL Illinois IN Indiana OH

  8. TRANSPORTATION SECURITY SENSOR NETWORK: SENSOR SELECTION AND SIGNAL STRENGTH ANALYSIS

    E-Print Network [OSTI]

    Kansas, University of

    , Lawrence, KS 66045-7559 All rights reserved. Project Sponsor: Oak Ridge National Laboratory TechnicalReport The University of Kansas #12;i Abstract Cargo theft is a major problem in the US; the FBI estimated losses of $15 Introduction 1 II System Architecture 1 II-A Mobile Rail Network

  9. hepex/9912017 FermilabPub99/354E

    E-Print Network [OSTI]

    . Grinstein, 1 P. Grudberg, 22 S. Gr¨unendahl, 29 G. Guglielmo, 52 A. Gupta, 13 S.N. Gurzhiev, 19 G. Gutierrez, 29 P. Gutierrez, 52 N.J. Hadley, 40 H. Haggerty, 29 S. Hagopian, 27 V. Hagopian, 27 K.S. Hahn, 48 R

  10. l"IZ`OESJ"-,,,,R"se"V[EI"gW[,S,,-OEvZxAv[` Total Resolution for Human Resource Development Based on Competency Ontology

    E-Print Network [OSTI]

    Mizoguchi, Riichiro

    Resources Development (2) HRD #12;2 HRD HRM Human Resource Management HRD (2 3 ) 4. 5 2 3 2 4 HRD HRD HRD ID·Ó"CZÒ ·ÝOEvZå`Ì OE·lLSA·ÝOEv ZÀ·Û,ÌSw·KS^"® HR·Ó"CZÒ OE¤·CSéæZÒ HRM #12;3 HR HRM HRM HRP HRU HRD HRD HR HRD

  11. Business Feasibility Plan for an Onsite Mobile Oil Changing Business

    E-Print Network [OSTI]

    Hecker, Jon W.

    2012-05-11

    recycling center in Olathe, KS that will accept up to 5 gallons of used motor oil per person, per day (Earth911.com 2012). Further information on how the process will work when applied to a company can be seen in Oil2U’s proposal to Company X, which can...

  12. Impacts of Global Change on Diseases of Agricultural Crops and Forest Trees

    E-Print Network [OSTI]

    Department of Plant Pathology, Kansas State University, Manhattan, KS 66506-5502, USA. 5 Natural Resources on Climate Change projects rising levels of greenhouse gas and global temperature. The well-known dependence on pathogens have recently been shown in literature linking pathogen abundance to atmospheric composition. Past

  13. Laplace Transforms An integral transform is an operator

    E-Print Network [OSTI]

    Ikenaga, Bruce

    9­28­1998 Laplace Transforms An integral transform is an operator F (s) = Z b a K(s; t)f(t) dt: The input to the transform is the function f(t); the output is the function F (s). (By convention, small letters denote the inputs to a transform, and the corresponding capital letters denote the corresponding

  14. Aalborg Universitet Hybrid Control of a Two-Wheeled Automatic-Balancing Robot with Backlash Feature

    E-Print Network [OSTI]

    Yang, Zhenyu

    .000057 Jp = Moment of inertia of the pendulum [Kg·m2 ] = 0.211527 Jm = Moment of inertia of the motor shaft backlash angle [rad] = 0.366 ks = Shaft elasticity [Nm/rad] cs = Inner damping coefficient of the shaft [Nm/(rad/s)] Ts = Shaft torque [Nm] Tm = Motor torque [Nm] Td = Load torque [Nm] l = Load angle [rad] m = Motor

  15. Making Pleated Draw Draperies. 

    E-Print Network [OSTI]

    Tompkins, Charlotte

    1961-01-01

    tacks (Figure 20) every 9 to 12 inches. The III~ t~ks can be clippetl antl joining hooks rllo~etl \\vhen it is necessary to take the tlraperies I\\\\ n. Figure 30. A \\tltlition;~l atlvantages ol this pl;~n are that rlt I\\ ni'l) be shifted so...

  16. Environmental impacts of ethylene production from diverse feedstocks and energy sources

    E-Print Network [OSTI]

    Ghanta, Madhav; Fahey, Darryl; Subramaniam, Bala

    2013-06-01

    , the GaBi® software reliably predicts the qualitative trends. The predicted emissions agree well with the actual emissions data reported by a coal-based power plant (Lawrence Energy Center, Lawrence, KS) and a natural gas-based power plant (Astoria...

  17. int. j. remote sensing, 1999, vol. 20, no. 17, 3281 3291 A remote sensing and GIS-based model of habitats and biodiversity in

    E-Print Network [OSTI]

    Debinski, Diane M.

    int. j. remote sensing, 1999, vol. 20, no. 17, 3281± 3291 A remote sensing and GIS-based model, University of Kansas, Lawrence, KS 66047, USA and §Kansas Applied Remote Sensing (KARS) Program, 2291 Irving 31 May 1998) Abstract. We used remotely sensed data and geographical information systems (GIS

  18. Design of linear multivariable systems with reduced sensitivity to parameter variations 

    E-Print Network [OSTI]

    Martin, Philippe Jean-Maurice

    1977-01-01

    of the adjoint matrix. Me then have the fol locating resul ts. dx, = (tr R (x, )) (R (&, , )*(dA + , 'dB}F)) ? (tr R (x, )) ((R?(~. )aF(~, I ? A + LI:) 1):. (dA + (d~)F) -(?Rp(v. ) ) (R~()(- j*((d~)I ) ) 3 2 J II-7 Remar ks (a) In this full...

  19. Variation in ecogeographical traits of pecan cultivars and provenances 

    E-Print Network [OSTI]

    Sagaram, Madhulika

    2009-05-15

    and provenances (i.e., the area of origin of seed). An assessment of leaf anatomical traits of pecan cultivars (Pawnee, Mohawk and Starking Hardy Giant) collected from three locations (Tifton, GA., Chetopa, KS., and Stillwater, OK.) was conducted to provide...

  20. Design of Bulk Railway Terminals for the Shale Oil and Gas Industry C. Tyler Dick1

    E-Print Network [OSTI]

    Barkan, Christopher P.L.

    -Champaign 1241 Newmark Civil Engineering Lab, MC-250, 205 N. Mathews Avenue, Urbana, IL 61801, U.S.A., E Engineering, Inc., 8005 Hallet Street, Lenexa, KS 66215, U.S.A., E-mail: lynn.brown@hdrinc.com. ABSTRACT of crude oil and natural gas are trapped beneath the ground surface in non-permeable shale rock

  1. Detrital zircon provenance of Neoproterozoic to Cenozoic deposits in Iran: Implications for chronostratigraphy and collisional tectonics

    E-Print Network [OSTI]

    Horton, Brian K.

    Detrital zircon provenance of Neoproterozoic to Cenozoic deposits in Iran: Implications 14155-6455, Tehran, Iran d Department of Geology, University of Kansas, Lawrence, KS 66045, USA e provenance history of Iran. The results place improved chronological constraints on the age of earliest

  2. Plants & Animals Biotechnology

    E-Print Network [OSTI]

    Rogers, John A.

    adhesion method for printing electronics on a variety of tricky surfaces such as clothes, plastic on a variety of tricky surfaces such as clothes, plastic and leather. (Credit: iStockphoto/Stephan Hoerold) Ads.Wattre.com Discount Rubber Mulch ILLinois-Ohio-Wi-IN MO-KS shreddedmulch.com national polymer labs Polymer and nano

  3. Seven Traffic Signals in Two Minutes

    SciTech Connect (OSTI)

    None

    2011-01-01

    Topeka, KS has activated the first of three key traffic corridors to receive a "green light tunnel," a real-time adaptive traffic signal system that synchronizes signals to create a series of green lights for motorists. The result is fewer stops, less travel time and -- most importantly -- a lot of saved gasoline.

  4. Searches for CP violation in two-body charm decays

    E-Print Network [OSTI]

    Alexander, Michael

    2015-01-01

    The LHCb experiment recorded data corresponding to an integrated luminosity of 3.0 $fb^{-1}$ during its first run of data taking. These data yield the largest samples of charmed hadrons in the world and are used to search for CP violation in the $D^0$ system. Among the many measurements performed at LHCb, a measurement of the direct CP asymmetry in $D^0 \\rightarrow K_S^0 K_S^0$ decays is presented and is found to be $A_{CP}(D^0 \\rightarrow K_S^0 K_S^0) = (-2.9 \\pm 5.2 \\pm 2.2)\\, \\%, $ where the first uncertainty is statistical and the second systematic. This represents a significant improvement in precision over the previous measurement of this parameter. Measurements of the parameter $A^\\Gamma$, defined as the CP asymmetry of the $D^0$ effective lifetime when decaying to a CP eigenstate, are also presented. Using semi-leptonic b-hadron decays to tag the flavour of the $D^0$ meson at production with the $K^+K^-$ and $\\pi^+\\pi^-$ final states yields $A^\\Gamma(K^+K^-) = (-0.134 \\pm 0.077^{+0.026}_{-0.034})\\, \\%...

  5. Centrality dependence of charged hadron and strange hadron elliptic flow from root s(NN)=200 GeVAu+Au collisions 

    E-Print Network [OSTI]

    Abelev, B. I.; Aggarwal, M. M.; Ahammed, Z.; Anderson, B. D.; Arkhipkin, D.; Averichev, G. S.; Bai, Y.; Balewski, J.; Barannikova, O.; Barnby, L. S.; Baudot, J.; Baumgart, S.; Beavis, D. R.; Bellwied, R.; Benedosso, F.; Betts, R. R.; Bhardwaj, S.; Bhasin, A.; Bhati, A. K.; Bichsel, H.; Bielcik, J.; Bielcikova, J.; Bland, L. C.; Bombara, M.; Bonner, B. E.; Botje, M.; Braidot, E.; Brandin, A. V.; Bueltmann, S.; Burton, T. P.; Bystersky, M.; Cai, X. Z.; Caines, H.; Sanchez, M. Calderon de la Barca; Callner, J.; Catu, O.; Cebra, D.; Cervantes, M. C.; Chajecki, Z.; Chaloupka, P.; Chattopadhyay, S.; Chen, H. F.; Chen, J. H.; Chen, J. Y.; Cheng, J.; Cherney, M.; Chikanian, A.; Choi, K. E.; Christie, W.; Chung, S. U.; Clarke, R. F.; Codrington, M. J. M.; Coffin, J. P.; Cormier, T. M.; Cosentino, M. R.; Cramer, J. G.; Crawford, H. J.; Das, D.; Dash, S.; Daugherity, M.; De Moura, M. M.; Dedovich, T. G.; DePhillips, M.; Derevschikov, A. A.; de Souza, R. Derradi; Didenko, L.; Dietel, T.; Djawotho, P.; Dogra, S. M.; Dong, X.; Drachenberg, J. L.; Draper, J. E.; Du, F.; Dunlop, J. C.; Mazumdar, M. -R Dutta; Edwards, W. R.; Efimov, L. G.; Elhalhuli, E.; Emelianov, V.; Engelage, J.; Eppley, G.; Erazmus, B.; Estienne, M.; Eun, L.; Fachini, P.; Fatemi, R.; Fedorisin, J.; Feng, A.; Filip, P.; Finch, E.; Fine, V.; Fisyak, Y.; Gagliardi, Carl A.; Gaillard, L.; Ganti, M. S.; Garcia-Solis, E.; Ghazikhanian, V.; Ghosh, R.; Gorbunov, Y. N.; Gordon, A.; Grebenyuk, O.; Grosnick, D.; Grube, B.; Guertin, S. M.; Gupta, A.; Gupta, N.; Guryn, W.; Haag, B.; Hallman, T. J.; Hamed, A.; Harris, J. W.; He, W.; Heinz, M.; Heppelmann, S.; Hippolyte, B.; Hirsch, A.; Hoffman, A. M.; Hoffmann, G. W.; Hofman, D. J.; Hollis, R. S.; Huang, H. Z.; Hughes, E. W.; Humanic, T. J.; Lgo, G.; Iordanova, A.; Jacobs, P.; Jacobs, W. W.; Jakl, P.; Jin, F.; Jones, P. G.; Judd, E. G.; Kabana, S.; Kajimoto, K.; Kang, K.; Kapitan, J.; Kaplan, M.; Keane, D.; Kechechyan, A.; Kettler, D.; Khodyrev, V. Yu; Kiryluk, J.; Kisiel, A.; Klein, S. R.; Knospe, A. G.; Kocoloski, A.; Koetke, D. D.; Kollegger, T.; Kopytine, M.; Kotchenda, L.; Kouchpil, V.; Kravtsov, P.; Kravtsov, V. I.; Krueger, K.; Kuhn, C.; Kumar, A.; Kumar, L.; Kurnadi, P.; Lamont, M. A. C.; Landgraf, J. M.; Lange, S.; LaPointe, S.; Laue, F.; Lauret, J.; Lebedev, A.; Lednicky, R.; Lee, C. -H; LeVine, M. J.; Li, C.; Li, Y.; Lin, G.; Lin, X.; Lindenbaum, S. J.; Lisa, M. A.; Liu, F.; Liu, H.; Liu, J.; Liu, L.; Ljubicic, T.; Llope, W. J.; Longacre, R. S.; Love, W. A.; Lu, Y.; Ludlam, T.; Lynn, D.; Ma, G. L.; Ma, J. G.; Ma, Y. G.; Mahapatra, D. P.; Majka, R.; Mangotra, L. K.; Manweiler, R.; Margetis, S.; Markert, C.; Matis, H. S.; Matulenko, Yu A.; McShane, T. S.; Meschanin, A.; Millane, J.; Miller, M. L.; Minaev, N. G.; Mioduszewski, Saskia; Mischke, A.; Mitchell, J.; Mohanty, B.; Morozov, D. A.; Munhoz, M. G.; Nandi, B. K.; Nattrass, C.; Nayak, T. K.; Nelson, J. M.; Nepali, C.; Netrakanti, P. K.; Ng, M. J.; Nogach, L. V.; Nurushev, S. B.; Odyniec, G.; Ogawa, A.; Okada, H.; Okorokov, V.; Oldenburg, M.; Olson, D.; Pachr, M.; Pal, S. K.; Panebratsev, Y.; Pawlak, T.; Peitzmann, T.; Perevoztchikov, V.; Perkins, C.; Peryt, W.; Phatak, S. C.; Planinic, M.; Pluta, J.; Poljak, N.; Porile, N.; Poskanzer, A. M.; Potekhin, M.; Potukuchi, B. V. K. S.; Prindle, D.; Pruneau, C.; Pruthi, N. K.; Putschke, J.; Qattan, I. A.; Raniwala, R.; Raniwala, S.; Ray, R. L.; Relyea, D.; Ridiger, A.; Ritter, H. G.; Roberts, J. B.; Rogachevskiy, O. V.; Romero, J. L.; Rose, A.; Roy, C.; Ruan, L.; Russcher, M. J.; Rykov, V.; Sahoo, R.; Sakrejda, I.; Sakuma, T.; Salur, S.; Sandweiss, J.; Sarsour, M.; Schambach, J.; Scharenberg, R. P.; Schmitz, N.; Schweda, K.; Seger, J.; Selyuzhenkov, I.; Seyboth, P.; Shabetai, A.; Shahaliev, E.; Shao, M.; Sharma, M.; Shi, S. S.; Shi, X. -H; Sichtermann, E. P.; Simon, F.; Singaraju, R. N.; Skoby, M. J.; Smirnov, N.; Snellings, R.; Sorensen, P.; Sowinski, J.; Spinka, H. M.; Srivastava, B.; Stadnik, A.; Stanislaus, T. D. S.; Staszak, D.; Stock, R.; Strikhanov, M.; Stringfellow, B.; Suaide, A. A. P.; Suarez, M. C.; Subba, N. L.; Sumbera, M.; Sun, X. M.; Sun, Z.; Surrow, B.; Symons, T. J. M.; de Toledo, A. Szanto; Takahashi, J.; Tang, A. H.; Tang, Z.; Tarnowsky, T.; Thein, D.; Thomas, J. H.; Tian, J.; Timmins, A. R.; Timoshenko, S.; Tokarev, M.; Tram, V. N.; Tratmer, A. L.; Trentalange, S.; Tribble, Robert E.; Tsai, O. D.; Ulery, J.; Ullrich, T.; Underwood, D. G.; Van Buren, G.; van der Kolk, N.; van Leeuwen, M.; Molen, A. M. Vander; Varma, R.; Vasconcelos, G. M. S.; Vasilevski, I. M.; Vasiliev, A. N.; Videbaek, F.; Vigdor, S. E.; Viyogi, Y. P.; Vokal, S.; Voloshin, S. A.; Wada, M.; Waggoner, W. T.; Wang, F.; Wang, G.; Wang, J. S.; Wang, Q.; Wang, X.; Wang, X. L.; Wang, Y.; Webb, J. C.

    2008-01-01

    ) with the Lee-Yang zero method for K(S)(0) and A. In the relatively low PT region, P(T) <= 2 GeV/c, a scaling with m(T) - m is observed for identified hadrons in each centrality bin studied. However, we do not observe nu 2(p(T))) scaled by the participant...

  6. Ecological Genomics of Nematode Community Interactions: Model and Non-model Approaches

    E-Print Network [OSTI]

    Herman, Mike

    Science Board in the United States issued a report that stated: Human activities are transforming. Abbreviations GO Gene ontology TD50 Time to death for 50% of a population M.A. Herman Ecological Genomics Institute, Kansas State University, 266 Chalmers Hall, Manhattan, KS, USA; Division of Biology, Kansas State

  7. Exploration Engineering Students Explore the World Through

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    of number: CO, MD, PA, CA, HI, KS, KY, MN, MO, NC, NE, OK, OR, TN, TX, WI) Home countries represented: 8 (In electricity; cumulus convection and cloud dynamics; atmospheric chemistry and air quality; satellite meteorol. Developing New Computer Models to Preserve "the View from the Top" The 1997 Kyoto Protocol altered Takanobu

  8. THE XMM-NEWTON /EPIC X-RAY LIGHT CURVE ANALYSIS OF WR 6

    E-Print Network [OSTI]

    Ignace, R.

    We obtained four pointings of over 100 ks each of the well-studied Wolf-Rayet star WR 6 with the XMM-Newton satellite. With a first paper emphasizing the results of spectral analysis, this follow-up highlights the X-ray ...

  9. ON THE RADIAL ONSET OF CLUMPING IN THE WIND OF THE B0I MASSIVE STAR QV NOR

    E-Print Network [OSTI]

    Oskinova, L.

    We present an analysis of a 78 ks Chandra high-energy transmission gratings observation of the B0I star QV Nor, the massive donor of the wind-accreting pulsar 4U1538?52. The neutron star (NS) orbits its companion in a very ...

  10. Evaluation of the relationship between cathode microstructure and electrochemical behavior for SOFCs

    E-Print Network [OSTI]

    Florida, University of

    for SOFCs J.R. Smith, A. Chen, D. Gostovic, D. Hickey, D. Kundinger, K.L. Duncan, R.T. DeHoff, K.S. Jones, E spectroscopy SOFC The need for high ef ciency and low emissions power sources has created signi cant interest in fuel cells. Solid oxide fuel cells (SOFCs) are desirable for their fuel versatility. Because high

  11. Multi-Conjugate Adaptive Optics images of the Trapezium Cluster

    E-Print Network [OSTI]

    H. Bouy; J. Kolb; E. Marchetti; E. L. Martin; N. Huelamo; D. Barrado y Navascues

    2007-09-25

    Multi-Conjugate Adaptive Optics (MCAO) combines the advantages of standard adaptive optics, which provides high contrast and high spatial resolution, and of wide field ~1' imaging. Up to recently, MCAO for astronomy was limited to laboratory experiments. In this paper, we present the first scientific results obtained with the first MCAO instrument put on the sky. We present a new study of the Trapezium cluster using deep MCAO images with a field of view of 1'x1' obtained at the VLT. We have used deep J, H and Ks images recently obtained with the prototype MCAO facility MAD at the VLT in order to search for new members and new multiple systems in the Trapezium cluster. On bright targets (Ks~9mag), these images allow us to reach DeltaKs~6mag as close as 0.4" We report the detection of 128 sources, including 10 new faint objects in the magnitude range between 16.1report the detection in J, H and Ks of a very red extended embedded protostellar object, HC419, previously detected in the thermal infrared only. The analysis of the first MCAO images obtained on the sky demonstrates not only the technical feasibility of MCAO but also its great potential and versatility in terms of scientific outputs.

  12. Measurement and Partitioning of in situ Carbon Fluxes in Turfgrasses D.J. Bremer*, J.M. Ham, and K. Su*

    E-Print Network [OSTI]

    procedure was developed that accounted for this small soil flux. Licor6400 Custom Chamber FlowMeter Voltage) that illustrate the design of a pressurized chamber system. A variable flow air pump and manometer were used. 1). · Measurements collected at Rocky Ford Turfgrass Research Center, Manhattan, KS. · Soil type

  13. Robust Branch-Cut-and-Price Algorithms for Vehicle Routing ...

    E-Print Network [OSTI]

    2007-09-07

    terms of variables from a suitable original formulation could be dynamically separated .... that at least k(S) arcs must enter each set S. Even for other VRP variants, inequalities of the ...... In short, we perform a sort of binary search to determine a ...

  14. L.M. Moskal ---p. 1 Office Phone: 206.221.6391, E-mail: lmmoskal@uw.edu Website: http://faculty.washington.edu/lmmoskal/

    E-Print Network [OSTI]

    Brown, Sally

    D Doctorate in Philosophy, Geography Honors (GPA 4.0), Department of Geography, The University of Kansas, Lawrence, KS 2000 MS Master of Science, Geography Honors (Specialization: Remote Sensing and GIS), Department of Geography, University of Calgary, Calgary, AB, Canada 1996 BS Bachelor of Environmental Studies

  15. Design and Performance of Elastic Fastening System Assemblies and Concrete Sleepers for Heavy-Haul Service

    E-Print Network [OSTI]

    Barkan, Christopher P.L.

    , Inc. Overland Park, KS, USA Abstract As heavy-haul freight axle loads and cumulative tonnages increase costs of concrete sleeper fastening systems is of paramount importance to the railway industry to ensure addressing current problems the industry is facing regarding the use of concrete sleepers and fastening

  16. The disappearance of the progenitor of SN 2012aw in late-time imaging

    E-Print Network [OSTI]

    Fraser, M

    2015-01-01

    We present new late-time near-infrared imaging of the site of the nearby core-collapse supernova SN 2012aw, confirming the disappearance of the point source identified by Fraser et al. (2012) and Van Dyk et al. (2012) as a candidate progenitor in both J and Ks filters. We re-measure the progenitor photometry, and find that both the J and Ks magnitudes of the source are consistent with those quoted in the literature. We also recover a marginal detection of the progenitor in H-band, for which we measure H=19.67+/-0.40 mag. SN 2012aw appears to have resulted from the explosion of a 12.5+/-1.5 Msun red supergiant.

  17. phi-meson photoproduction on Hydrogen in the neutral decay mode

    SciTech Connect (OSTI)

    Seraydaryan, Helena; Amaryan, Moscov J.; Gavalian, Gagik; Baghdasaryan, Hovhannes A.; Weinstein, Larry

    2014-05-01

    We report the first measurement of the photoproduction cross section of the $\\phi$ meson in its neutral decay mode in the reaction $\\gamma p \\to p\\phi(K_SK_L)$. The experiment was performed with a tagged photon beam of energy $1.6 \\le E_\\gamma \\le 3.6$ GeV incident on a liquid hydrogen target of the CLAS spectrometer at the Thomas Jefferson National Accelerator Facility. The $p \\phi$ final state is identified via reconstruction of $K_S$ in the invariant mass of two oppositely charged pions and by requiring the missing particle in the reaction $\\gamma p \\to p K_S X$ to be $K_L$. The presented results significantly enlarge the existing data on $\\phi$-photoproduction. These data, combined with the data from the charged decay mode, will help to constrain different mechanisms of $\\phi$ photoproduction.

  18. The fourth family: a simple explanation for the observed pattern of anomalies in B-CP asymmetries

    E-Print Network [OSTI]

    Amarjit Soni; Ashutosh Kumar Alok; Anjan Giri; Rukmani Mohanta; Soumitra Nandi

    2009-12-20

    We show that a fourth family of quarks with $m_{t'}$ in the range of (400 - 600) GeV provides a rather simple explanation for the several indications of new physics that have been observed involving CP asymmetries of the b-quark. The built-in hierarchy of the 4$\\times$4 mixing matrix is such that the $t'$ readily provides a needed {\\it perturbation} ($\\approx 15%$) to $\\sin 2 \\beta$ as measured in $B \\to \\psi K_s$ and simultaneously is the dominant source of CP asymmetry in $B_s \\to \\psi \\phi$. The correlation between CP asymmetries in $B_s \\to\\psi \\phi$ and $B_d\\to\\phi K_s$ suggests $m_{t'} \\approx$ (400 - 600) GeV. Such heavy masses point to the tantalizing possibility that the 4th family plays an important role in the electroweak symmetry breaking.

  19. A small unperturbing probe for the measurement and mapping of electric fields at extremely low frequencies 

    E-Print Network [OSTI]

    Shrekenhamer, Abraham

    1975-01-01

    ) Substituting from (1. 4) into (1. 5) [4: p. 45] yields p V VU= ?? C (1. 6a) or (1. 6b) This is known as Poisson's equation. For the special case of charge- free space p = 0 and VV=0 (1 7) Eq. (1. 7) is known as Laplace's equation, a second order...) dt = q (t) = ks E (t) dS (1. 19) D For the cubical geometry: 11 f i (t)dt = ks E dS z z Z face (1. 20) Let E denote the average electric field over the z face. Then z f 2 i (t)dt = kE sJ dS ~skE a z z z Z face (1. 21) where a is the cube...

  20. Distributions of the Hardness Ratio of short and Long Gamma-Ray Bursts in Different Time Intervals within the First 2 Seconds

    E-Print Network [OSTI]

    Yun-Ming Dong; Yi-Ping Qin

    2005-03-16

    In the present paper, we investigated the distribution of hardness ratio (HR) for short and long gamma-ray bursts (GRBs) in different time scales for the first two seconds. After including and subtracting the background count, we performed a Kolmogorov--Smirnov (K-S) test to the HR distributions of the two classes of GRBs in each time interval. Our analysis shows that the probabilities of the KS test to the distributions are very small, suggesting that the two classes of bursts are unlikely to arise from the same HR distributions, and indicating that they probably originate from the different physical processes and central engine. In addition, we found that the hardness ratio of short bursts within the time interval of 0$-$0.96 seconds changes hard-to-soft, on the other hand long bursts do not. The two kinds of bursts have different characteristics in the first 2 seconds which might be associated with different physical mechanisms.

  1. Development of interatomic potentials appropriate for simulation of devitrification of Al90Sm10 alloy

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

    Mendelev, M. I.; Zhang, F.; Ye, Z.; Sun, Y.; Nguyen, M. C.; Wilson, S. R.; Wang, C. Z.; Ho, K. M.

    2015-04-23

    In this study, a semi-empirical potential for the Al90Sm10 alloy is presented. The potential provides satisfactory reproduction of pure Al properties, the formation energies of a set of Al–Sm crystal phases with Sm content about 10%, and the structure of the liquid Al90Sm10 alloy. During molecular dynamics simulation in which the liquid alloy is cooled at a rate of 1010 K/s, the developed potential produces a glass structure with lower ab initio energy than that produced by ab initio molecular dynamics (AIMD) itself using a typical AIMD cooling rate of 8 ?1013 K/s. Based on these facts the developed potentialmore »should be suitable for simulations of phase transformations in the Al90Sm10 alloy.« less

  2. Study of strange particle production in pp collisions with the ALICE detector

    E-Print Network [OSTI]

    H. Ricaud; A. Kalweit; A. Maire

    2010-03-24

    ALICE is well suited for strange particles production studies since it has very good reconstruction capabilities in the low transverse momentum ($p_{t}$) region and it also allows to extend the identification up to quite high $p_{t}$. Charged strange mesons ($\\kp$, $\\km$,) are reconstructed via energy loss measurements whereas neutral strange mesons ($\\ks$) and strange hyperons ($\\lam$, $\\Xi$, $\\Omega$) are identified via vertex reconstruction. All these particles carry important information: first, the measurement of production yields and the particle ratio within the statistical models can help to understand the medium created and secondly the dynamics at intermediate $p_{t}$ investigated via the baryon over meson ratio ($\\lam / \\ks$) allows a better understanding of the hadronization mechanisms and of the underlying event processes. We present these two aspects of the strange particles analysis in pp collisions using simulated data.

  3. ISCO, Lyapunov exponent and Kolmogorov-Sinai entropy for Kerr-Newman Black hole

    E-Print Network [OSTI]

    Partha Pratim Pradhan

    2012-12-23

    We compute the principal Lyapunov exponent and Kolmogorov-Sinai(KS) entropy for Kerr-Newman black hole space-times and investigate the stability and instability of the equatorial circular geodesics via these exponents. We also show that the principal Lyapunov exponent and KS entropy can be expressed in terms of the radial equation of ISCO(innermost stable circular orbit) for timelike circular geodesics. The other aspect we have studied that among the all possible circular geodesics, which encircle the central black-hole, the timelike circular geodesics has the longest orbital period i.e. T_{timelike} > T_{photon}, than the null circular geodesics (photon sphere) as measured by asymptotic observers. Thus, the timelike circular geodesics provide the slowest way to circle the Kerr-Newman black-hole. In fact, any stable timelike circular geodesics other than the ISCO traverses more slowly than the null circular geodesics.

  4. 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.

  5. The Phoenix Deep Survey: Extremely Red Galaxies and Cluster Candidates

    E-Print Network [OSTI]

    Anthony G. Smith; Andrew M. Hopkins; Richard W. Hunstead; Samuel J. Schmidt; José Afonso; Antonis E. Georgakakis; Lawrence E. Cram; Bahram Mobasher; Mark Sullivan

    2008-04-24

    We present the results of a study of a sample of 375 Extremely Red Galaxies (ERGs) in the Phoenix Deep Survey, 273 of which constitute a subsample which is 80% complete to K_s = 18.5 over an area of 1160 arcmin^2. The angular correlation function for ERGs is estimated, and the association of ERGs with faint radio sources explored. We find tentative evidence that ERGs and faint radio sources are associated at z > 0.5. A new overdensity-mapping algorithm has been used to characterize the ERG distribution, and identify a number of cluster candidates, including a likely cluster containing ERGs at 0.5 4 criterion is more efficient than R - K_s > 5 at selecting dusty star-forming galaxies, rather than passively evolving ERGs.

  6. Coarse-grained interaction potentials for polyaromatic hydrocarbons

    E-Print Network [OSTI]

    O. Anatole von Lilienfeld; Denis Andrienko

    2005-12-09

    Using Kohn-Sham density functional theory (KS-DFT), we have studied the interaction between various polyaromatic hydrocarbon molecules. The systems range from mono-cyclic benzene up to hexabenzocoronene (hbc). For several conventional exchange-correlation functionals potential energy curves of interaction of the $\\pi$-$\\pi$ stacking hbc dimer are reported. It is found that all pure local density or generalized gradient approximated functionals yield qualitatively incorrect predictions regarding structure and interaction. Inclusion of a non-local, atom-centered correction to the KS-Hamiltonian enables quantitative predictions. The computed potential energy surfaces of interaction yield parameters for a coarse-grained potential, which can be employed to study discotic liquid-crystalline mesophases of derived polyaromatic macromolecules.

  7. Three-Year Global Survey of Coronal Null Points from Potential-Field-Source-Surface (PFSS) Modeling and Solar Dynamics Observatory (SDO) Observations

    E-Print Network [OSTI]

    Freed, Michael; McKenize, David

    2014-01-01

    This article compiles and examines a comprehensive coronal magnetic-null-point survey created by potential-field-source-surface (PFSS) modeling and Solar Dynamics Observatory/Atmospheric Imaging Assembly (SDO/AIA) observations. The locations of 582 potential magnetic null points in the corona were predicted from the PFSS model between Carrington Rotations (CR) 2098 (June 2010) and 2139 (July 2013). These locations were manually inspected, using contrast-enhanced SDO/AIA images in 171 angstroms at the east and west solar limb, for structures associated with nulls. A Kolmogorov--Smirnov (K--S) test showed a statistically significant difference between observed and predicted latitudinal distributions of null points. This finding is explored further to show that the observability of null points could be affected by the Sun's asymmetric hemisphere activity. Additional K--S tests show no effect on observability related to eigenvalues associated with the fan and spine structure surrounding null points or to the orie...

  8. Effect of oxygen on weld shape and crystallographic orientation of duplex stainless steel weld using advanced A-TIG (AA-TIG) welding method

    SciTech Connect (OSTI)

    Zou, Ying, E-mail: yingzou@jwri.osaka-u.ac.jp; Ueji, Rintaro; Fujii, Hidetoshi

    2014-05-01

    The double-shielded advanced A-TIG (AA-TIG) welding method was adopted in this study for the welding of the SUS329J4L duplex stainless steel with the shielding gases of different oxygen content levels. The oxygen content in the shielding gas was controlled by altering the oxygen content in the outer layer gas, while the inner layer remained pure argon to suppress oxidation on the tungsten electrode. As a result, a deep weld penetration was obtained due to the dissolution of oxygen into the weld metals. Additionally, the microstructure of the weld metal was changed by the dissolution of oxygen. The austenite phase at the ferrite grain boundary followed a Kurdjumov–Sachs (K–S) orientation relationship with the ferrite matrix phase at any oxide content. On the other hand, the orientation relationship between the intragranular austenite phase and the ferrite matrix phase exhibited different patterns under different oxygen content levels. When there was little oxide in the fusion zone, only a limited part of the intragranular austenite phase and the ferrite matrix phase followed the K–S orientation relationship. With the increase of the oxide, the correspondence of the K–S relationship increased and fit very well in the 2.5% O{sub 2} shielded sample. The investigation of this phenomenon was carried out along with the nucleation mechanisms of the intragranular austenite phases. - Highlights: • Weld penetration increased with the increase of the oxygen content. • Average diameter and number density of oxide were changed by the oxygen content. • K-S relationship of Widmanstätten austenite/ferrite wasn’t varied by oxide. • Orientation relationship of intragranular austenite/ferrite was varied by oxide.

  9. Atmos. Chem. Phys., 5, 14591466, 2005 www.atmos-chem-phys.org/acp/5/1459/

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    -sea interface is de- scribed by: Ft = (ks(pCO2sea - pCO2air))t . (1) where Ft is the flux integrated over a time air-sea CO2 flux caused by temporal averaging of sea-level pressure H. Kettle and C. J. Merchant, such as wind speed and air pressure, can cause large er- rors in air-sea carbon flux estimates. Other

  10. Optimizing Power Factor Correction 

    E-Print Network [OSTI]

    Phillips, R. K.; Burmeister, L. C.

    1986-01-01

    FACTOR CORRECTION Robert K. Phillips and Louis C. Burmeister, Mechanical Engineering, University of Kansas, Lawrence, KS The optimal investment for power factor correcting capacitors for Kansas Power and Light Company large power contract customers... consumer of electricity were made for demands of 200, 400, 800, 1,600, 3,200, and 6,400 k\\~ and monthly energy consumption periods of 100, 150, 200, 300, 400, and 500 hours for several capacitor purchase and installation costs. The results...

  11. Large-Scale Reconfigurable Computing in a Microsoft Datacenter Capabilities, Costs

    E-Print Network [OSTI]

    Hauck, Scott

    attachments to server 68 C #12;· Altera Stratix V GS D5 · 172k ALMs, 2,014 M20Ks, 1,590 DSPs · 8GB DDR3 slot Stratix V 8GB DDR3 PCIe Gen3 x8 4x 20 Gbps Torus Network Config Flash #12;FPGA Mezz Conn. 1U #12 SLIII South SLIII North SLIII x8 PCIe Core DMA Engine Config Flash (RSU) DDR3 Core 1DDR3 Core 0 JTAG

  12. Density Functional Study of the Phase Diagram and Pressure-Induced Superconductivity in P: Implication for Spintronics

    E-Print Network [OSTI]

    Savrasov, Sergej Y.

    : Implication for Spintronics S. Ostanin,1 V. Trubitsin,2 J. B. Staunton,1 and S.Y. Savrasov3 1 Department to spintronics applications. DOI: 10.1103/PhysRevLett.91.087002 PACS numbers: 74.25.Jb, 61.50.Ks, 74.78.Fk, 85 lead to a signifi- cant breakthrough in technological spintronics applica- tions in which combined spin

  13. Student Awards Banquet Flyer

    E-Print Network [OSTI]

    2012-01-01

    You are cordially invited to attend the Nineteenth Annual Black Faculty & Staff Council Student Awards Banquet Friday, April 13, 2012 6:00 p.m. Jayhawk Room, Kansas Union University of Kansas, Lawrence, KS Featured Speaker Dr. Beryl New... School of Education Alumni Please RSVP to Precious Porras at pporras@ku.edu no later than April 11. You are cordially invited to attend the Nineteenth Annual Black Faculty & Staff Council Student Awards Banquet Friday, April 13, 2012 6:00 p...

  14. Drill press "*il:J",,",,",tdont cone wrth bit stdAe? t(I

    E-Print Network [OSTI]

    Oh, Paul

    Drill press "*il:J",,",,",tdont cone wrth bit stdAe? t(I N'trkeyour own Ptrotng racK fron scrapwoodandPutdrill bits, sandingdrums' hole sawsand countersmKs right at your nnger- dps.Hete'show: drilling8 the desiSn of this laluable drill Press N'* II "MeetmY new butler '\\-clffFs rHE F^M|LY(^NDYMAN MAY

  15. An integral monitoring of GRS1915+105: simultaneous observations with INTEGRAL, RXTE, the Ryle and Nancay radio telescopes

    E-Print Network [OSTI]

    J. Rodriguez; G. Pooley; D. C. Hannikainen; H. J. Lehto

    2006-11-07

    Since the launch of INTEGRAL in late 2002 we have monitored the Galactic microquasar GRS 1915+105 with long exposures (~100 ks) pointings. All the observations have been conducted simultaneously with other instruments, in particular RXTE and the Ryle Telescope, and in some cases with others (Spitzer, Nancay, GMRT, Suzaku,...). We report here the results of 3 observations performed simultaneously with INTEGRAL, RXTE, the Ryle and Nancay radio telescopes. These observations show the so-called $\

  16. Modern and Traditional Methods for Measuring Money Supply: The Case of Saudi Arabia

    E-Print Network [OSTI]

    Barnett, William A.; Alkhareif, Ryadh M.

    2015-02-25

    William A. Barnett 1,2,* and Ryadh M. Alkhareif 3 1 Department of Economics, University of Kansas, Lawrence, KS 66045-7585, USA 2 Center for Financial Stability, New York, NY 10036, USA 3 Saudi Arabian Monetary Agency, Riyadh 11169, Saudi Arabia; E.... Financial Stud. 2015, 3 50 one-for-one substitutes in producing liquidity services. Broad aggregates, which group currency with time deposits, will certainly fail to satisfy this assumption. Barnett [1,2] proposed monetary indexes that are consistent...

  17. A German-American Icon: O, du schöne Schnitzelbank!

    E-Print Network [OSTI]

    Keel, William

    2003-09-01

    is open to membership from individuals, societies, libraries, and organizations. © 2004 by The Society for German-American Studies ISSN 0741-2827 Printed at the University of Kansas Printing Service, Lawrence, KS 66045 ( YEARBOOK OF GERMAN... Rapids, Michigan, and Jasper, Indiana. The classical German-American Schnitzelbank chart and song would seem to be something truly "made in America." Judging by the frequency with which the Schnitzelbank or some variation of it appears in American...

  18. Benchmarking and tuning the MILC code on clusters and supercomputers

    SciTech Connect (OSTI)

    Steven A. Gottlieb

    2001-12-28

    Recently, we have benchmarked and tuned the MILC code on a number of architectures including Intel Itanium and Pentium IV (PIV), dual-CPU Athlon, and the latest Compaq Alpha nodes. Results will be presented for many of these, and we shall discuss some simple code changes that can result in a very dramatic speedup of the KS conjugate gradient on processors with more advanced memory systems such as PIV, IBM SP and Alpha.

  19. Calculation of Steady-State Evaporation for an Arbitrary Matric Potential at Ground Surface 

    E-Print Network [OSTI]

    Liu, Xin

    2014-12-15

    . .................... 6 Figure 2: The different contours of Ep/Ks value for N and –a/L in Eq. (9). ..................... 15 Figure 3: Influence of water table depth and matric potential on estimated evaporation rate for the Chino Clay... potential head (-cm) for the Chino Clay. ......................................................................... 29 Figure 7: Influence of water table depth and matric potential on estimated evaporation rate for the clay loam...

  20. Building Abbreviations Alumni Hall

    E-Print Network [OSTI]

    Johnson Jr.,, Ray

    20A/B 44 20A/B 44 20A/B 44 58 17 17 88 34 25 Building Abbreviations Alumni Hall Campbell Dome Colden FitzGerald Gym Frese Hall G Building Gertz Center Goldstein Theatre Honors Hall GC GB GT HH MU KY KG KS KP PH I Building Jefferson Hall Kiely Hall King Hall Kissena Hall Klapper Hall Music Building

  1. Coprolites in a Middle Triassic cycad pollen cone: evidence for insect pollination in early cycads?

    E-Print Network [OSTI]

    Klavins, Sharon D.; Kellogg, Derek W.; Krings, Michael; Taylor, Edith L.; Taylor, Thomas N.

    2005-01-01

    and Biodiversity Research Center, University of Kansas, Lawrence, KS 66045-7534, USA and 2Bayerische Staatssammlung für Paläontologie & Geologie und GeoBio-CenterLMU, Richard-Wagner-Straße 10, 80333 München, Germany ABSTRACT Question: What evidence... document the presence of pollen-laden coprolites in pollen sacs of a Middle Triassic cycad. Conclusions: These coprolites are comparable with fecal pellets of modern arthropods and we suggest that they were produced by beetles. This provides the oldest...

  2. Cuban Cinema. Michael Chanan. Minneapolis: University of Minnesota Press, 2004. ix+ 538 pp. (Review)

    E-Print Network [OSTI]

    Falicov, Tamara L.

    2008-01-01

    and heterosexist bias of the European literary tra- dition. Tempest in the Caribbean feels like Goldberg desperately in search of a subject suitable for his talents. Cuban Cinema. MICHAEL CHANAN. Minneapolis: University of Minnesota Press, 2004. ix + 538 pp.... (Paper US$ 25.95) TAMARA L. FALICOV Theatre and Film/Latin American Studies University of Kansas Lawrence KS 66045, U.S.A. There is no other English-language book as comprehensive in chronicling the history of Cuban cinema as Michael...

  3. Evidence for thermalization of surface-desorbed molecules at heating rates of 108

    E-Print Network [OSTI]

    Evidence for thermalization of surface-desorbed molecules at heating rates of 108 K/s C. R of aniline-d7 from a single-crystal surface 0001 of sapphire Al2O3 at a heating rate on the order of 108 K.e., pulsed heating of the sapphire surface on the nanosecond time scale leads to thermal desorption and rapid

  4. A Real-World Attack Breaking A5/1 within Hours Timo Gendrullis, Martin Novotny, Andy Rupp

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    /1 is a synchronous stream cipher accepting a 64-bit session key KS = (k0, . . . , k63) GF(2)64 and a 22-bit initial, and R3, respectively. The A5/1 keystream generator works as follows. First, an initialization phase/1 Based on this initial state Si the warm-up phase is performed where the generator is clocked for 100

  5. THE EFFECTS OF HIV INFECTION ON THE EXPRESSION OF THE DRUG EFFLUX PROTEINS P-GLYCOPROTEIN AND BREAST CANCER RESISTANCE PROTEIN IN A HUMAN INTESTINE MODEL

    E-Print Network [OSTI]

    Ellis, Kelstan Lynch

    2012-08-31

    and Public Health and the Graduate Faculty of the University of Kansas in partial fulfillment of the requirements for the degree of Master of Science in Clinical Research. ________________________________ Chairperson Edward F. Ellerbeck, MD, MPH...), infected with HIV and used to propogate the CXCR4-tropic LAI strain of HIV. MDCK-MDR1 cells were a generous gift from Dr. Jeff Krise (University of Kansas School of Pharmacy, Lawrence, KS). This cell line originates from Madin Darby canine kidney cells...

  6. The Chandra Local Volume Survey I: The X-ray Point Source Populations of NGC 55, NGC 2403, and NGC 4214

    E-Print Network [OSTI]

    Binder, B; Eracleous, M; Plucinsky, P P; Gaetz, T J; Anderson, S F; Skillman, E D; Dalcanton, J J; Kong, A K H; Weisz, D R

    2015-01-01

    We present comprehensive X-ray point source catalogs of NGC~55, NGC~2403, and NGC~4214 as part of the Chandra Local Volume Survey. The combined archival observations have effective exposure times of 56.5 ks, 190 ks, and 79 ks for NGC~55, NGC~2403, and NGC~4214, respectively. When combined with our published catalogs for NGC 300 and NGC 404, our survey contains 629 X-ray sources total down to a limiting unabsorbed luminosity of $\\sim5\\times10^{35}$ erg s$^{-1}$ in the 0.35-8 keV band in each of the five galaxies. We present X-ray hardness ratios, spectral analysis, radial source distributions, and an analysis of the temporal variability for the X-ray sources detected at high significance. To constrain the nature of each X-ray source, we carried out cross-correlations with multi-wavelength data sets. We searched overlapping Hubble Space Telescope observations for optical counterparts to our X-ray detections to provide preliminary classifications for each X-ray source as a likely X-ray binary, background AGN, su...

  7. Measurement of neutral strange particle production in the underlying event in proton-proton collisions at sqrt(s) = 7 TeV

    SciTech Connect (OSTI)

    Chatrchyan, Serguei; et al.

    2013-09-01

    Measurements are presented of the production of primary K(S)0 and Lambda particles in proton-proton collisions at sqrt(s) = 7 TeV in the region transverse to the leading charged-particle jet in each event. The average multiplicity and average scalar transverse momentum sum of K(S)0 and Lambda particles measured at pseudorapidities abs(eta) < 2 rise with increasing charged-particle jet pt in the range 1-10 GeV and saturate in the region 10-50 GeV. The rise and saturation of the strange particle yields and transverse momentum sums in the underlying event are similar to those observed for inclusive charged particles, which confirms the impact-parameter picture of multiple parton interactions. The results are compared to recent tunes of the PYTHIA Monte Carlo event generator. The PYTHIA simulations underestimate the data by 15-30% for K(S)0 mesons and by about 50% for Lambda baryons, a deficit similar to that observed for the inclusive strange particle production in non-single-diffractive proton-proton collisions. The constant strange- to charged-particle activity ratios and the similar trends for mesons and baryons indicate that the multiparton-interaction dynamics is decoupled from parton hadronization, which occurs at a later stage.

  8. Adaptive optics images. III. 87 Kepler objects of interest

    SciTech Connect (OSTI)

    Dressing, Courtney D.; Dupree, Andrea K. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Adams, Elisabeth R. [Planetary Science Institute, 1700 East Fort Lowell, Suite 106, Tucson, AZ 85719 (United States); Kulesa, Craig; McCarthy, Don, E-mail: cdressing@cfa.harvard.edu [Steward Observatory, The University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States)

    2014-11-01

    The Kepler mission has revolutionized our understanding of exoplanets, but some of the planet candidates identified by Kepler may actually be astrophysical false positives or planets whose transit depths are diluted by the presence of another star. Adaptive optics images made with ARIES at the MMT of 87 Kepler Objects of Interest place limits on the presence of fainter stars in or near the Kepler aperture. We detected visual companions within 1'' for 5 stars, between 1'' and 2'' for 7 stars, and between 2'' and 4'' for 15 stars. For those systems, we estimate the brightness of companion stars in the Kepler bandpass and provide approximate corrections to the radii of associated planet candidates due to the extra light in the aperture. For all stars observed, we report detection limits on the presence of nearby stars. ARIES is typically sensitive to stars approximately 5.3 Ks magnitudes fainter than the target star within 1'' and approximately 5.7 Ks magnitudes fainter within 2'', but can detect stars as faint as ?Ks = 7.5 under ideal conditions.

  9. Assessment of Density Functional Methods for Exciton Binding Energies and Related Optoelectronic Properties

    E-Print Network [OSTI]

    Lee, Jui-Che; Lin, Shiang-Tai

    2015-01-01

    The exciton binding energy, the energy required to dissociate an excited electron-hole pair into free charge carriers, is one of the key factors to the optoelectronic performance of organic materials. However, it remains unclear whether modern quantum-mechanical calculations, mostly based on Kohn-Sham density functional theory (KS-DFT) and time-dependent density functional theory (TDDFT), are reliably accurate for exciton binding energies. In this study, the exciton binding energies and related optoelectronic properties (e.g., the ionization potentials, electron affinities, fundamental gaps, and optical gaps) of 121 small- to medium-sized molecules are calculated using KS-DFT and TDDFT with various density functionals. Our KS-DFT and TDDFT results are compared with those calculated using highly accurate CCSD and EOM-CCSD methods, respectively. The omegaB97, omegaB97X, and omegaB97X-D functionals are shown to generally outperform (with a mean absolute error of 0.36 eV) other functionals for the properties inve...

  10. Assessment of Density Functional Methods for Exciton Binding Energies and Related Optoelectronic Properties

    E-Print Network [OSTI]

    Jui-Che Lee; Jeng-Da Chai; Shiang-Tai Lin

    2015-08-29

    The exciton binding energy, the energy required to dissociate an excited electron-hole pair into free charge carriers, is one of the key factors to the optoelectronic performance of organic materials. However, it remains unclear whether modern quantum-mechanical calculations, mostly based on Kohn-Sham density functional theory (KS-DFT) and time-dependent density functional theory (TDDFT), are reliably accurate for exciton binding energies. In this study, the exciton binding energies and related optoelectronic properties (e.g., the ionization potentials, electron affinities, fundamental gaps, and optical gaps) of 121 small- to medium-sized molecules are calculated using KS-DFT and TDDFT with various density functionals. Our KS-DFT and TDDFT results are compared with those calculated using highly accurate CCSD and EOM-CCSD methods, respectively. The omegaB97, omegaB97X, and omegaB97X-D functionals are shown to generally outperform (with a mean absolute error of 0.36 eV) other functionals for the properties investigated.

  11. X-ray/UV variability and the origin of soft X-ray excess emission from II Zw 177

    E-Print Network [OSTI]

    Pal, Main; Misra, Ranjeev; Pawar, Pramod K

    2016-01-01

    We study X-ray and UV emission from the narrow-line Seyfert 1 galaxy II~Zw~177 using a $137\\ks$ long and another $13\\ks$ short \\xmm{} observation performed in 2012 and 2001, respectively. Both observations show soft X-ray excess emission contributing $76.9\\pm4.9\\%$ in 2012 and $58.8\\pm10.2\\%$ in 2001 in the $0.3-2\\kev$ band. We find that both blurred reflection from an ionized disc and Comptonized disc emission describe the observed soft excess well. Time-resolved spectroscopy on scales of $\\sim20\\ks$ reveals strong correlation between the soft excess and the powerlaw components. The fractional variability amplitude $F_{var}$ derived from EPIC-pn lightcurves at different energy bands is nearly constant ($F_{var} \\sim20\\%$). This is in contrast to other AGNs where the lack of short term variation in soft X-ray excess emission has been attributed to intense light bending in the framework of the "lamppost" model. Thus, the variations in powerlaw emission are most likely intrinsic to corona rather than just due t...

  12. Repeated X-ray Flaring Activity in Sagittarius A*

    E-Print Network [OSTI]

    Guillaume Belanger; Andrea Goldwurm; Fulvio Melia; Farah Yusef-Zadeh; Philippe Ferrando; Delphine Porquet; Nicolas Grosso; Robert Warwick

    2005-08-19

    Investigating the spectral and temporal characteristics of the X-rays coming from Sagittarius A* (Sgr A*) is essential to our development of a more complete understanding of the emission mechanisms in this supermassive black hole located at the center of our Galaxy. Several X-ray flares with varying durations and spectral features have already been observed from this object. Here we present the results of two long XMM-Newton observations of the Galactic nucleus carried out in 2004, for a total exposure time of nearly 500 ks. During these observations we detected two flares from Sgr A* with peak 2-10 keV luminosities about 40 times (L ~ 9x10^34 erg s?1) above the quiescent luminosity: one on 2004 March 31 and another on 2004 August 31. The first flare lasted about 2.5 ks and the second about 5 ks. The combined fit on the Epic spectra yield photon indeces of about 1.5 and 1.9 for the first and second flare respectively. This hard photon index strongly suggests the presence of an important population of non-thermal electrons during the event and supports the view that the majority of flaring events tend to be hard and not very luminous.

  13. The Density and Spectral Energy Distributions of Red Galaxies at z~3.7

    E-Print Network [OSTI]

    Brammer, G B; Brammer, Gabriel B.; Dokkum, Pieter G. van

    2006-01-01

    We use the deep NIR imaging of the FIRES survey to investigate trends with redshift of the properties of galaxies selected to have strong Balmer/4000A breaks at 21.3 (AB) color criterion designed to select red galaxies at z>2, we propose two color criteria, J-H>0.9 and H-K>0.9, to select red galaxies in two redshift bins at 2=2.4 that satisfy Js-H>0.9; H=3.7 that satisfy H-Ks>0.9; Ks<24.6, where the flux limits are chosen to match the limiting rest-frame luminosities at the different median redshifts of the two samples. The space densities of the Js-H and H-Ks samples are 1.5+-0.5x10^-4 and 1.2+-0.4x10^-4 Mpc^-3, respectively. The rest-frame U-B colors of galaxies in both samples are similarly red (as expected from the definition of the color criteria), but the rest-frame UV properties are different: galaxies in the higher-redshift H-K selected sample have blue NUV-optical colors and UV slopes similar to those of Lyman Break Galaxies, while the J-H galaxies are generally red over the entire wavelength rang...

  14. Passivating ligand and solvent contribution to the electronics properties of semiconductor nanocrystals

    SciTech Connect (OSTI)

    Tretiak, Sergei; Crotty, Angela; Fischer, Sean; Kilina, Svetlana

    2010-10-04

    Expanding on previous work, we examine in detail the impact passivating ligands have on the electronic properties of CdSe quantum dots (QDs). We also explore the importance of the inclusion of solvent in simulating passivated QDs. Most ligand states are found well removed from the band edges, with pyridine being the exception and contributing states that sit right on the conduction band edge. Localized trap states are found for trimethylphosphine and pyridine capped QDs, with solvent helping to eliminate these. The effect of losing a ligand on the electronic properties of the system is observed to vary in proportion with the binding energy and steric bulk of the ligand. More disruption of the electronic properties is seen for tight-binding, sterically large ligands. We also look at the validity of using the single-particle Kohn-Sham (KS) representation to approximate optical absorption spectra. Besides a systematic blue-shift relative to the time-dependent density functional theory spectra, the KS spectra are in very good agreement with the more accurate method for these systems. Such agreement here justifies the use of the KS approach for calculating absorption spectra of QD systems.

  15. Asymptotic Giant Branch Stars in the Phoenix Dwarf Galaxy

    E-Print Network [OSTI]

    John Menzies; Michael Feast; Patricia Whitelock; Enrico Olivier; Noriyuki Matsunaga; Gary Da Costa

    2007-12-29

    JHKs near-infrared photometry of stars in the Phoenix dwarf galaxy is presented and discussed. Combining these data with the optical photometry of Massey et al. allows a rather clean separation of field stars from Phoenix members. The discovery of a Mira variable (P = 425 days), which is almost certainly a carbon star, leads to an estimate of the distance modulus of 23.10+/-0.18 that is consistent with other estimates and indicates the existence of a significant population of age ~2 Gyr. The two carbon stars of Da Costa have M{bol} = -3.8 and are consistent with belonging to a population of similar age; some other possible members of such a population are identified. A Da Costa non-carbon star is Delta Ks~0.3 mag brighter than these two carbon stars. It may be an AGB star of the dominant old population. The nature of other stars lying close to it in the Ks,(J-Ks) diagram needs studying.

  16. Full-Scale Testing of a Mercury Oxidation Catalyst Upstream of a Wet FGD System

    SciTech Connect (OSTI)

    Gary Blythe; Jennifer Paradis

    2010-06-30

    This document presents and discusses results from Cooperative Agreement DE-FC26-06NT42778, 'Full-scale Testing of a Mercury Oxidation Catalyst Upstream of a Wet FGD System,' which was conducted over the time-period July 24, 2006 through June 30, 2010. The objective of the project was to demonstrate at full scale the use of solid honeycomb catalysts to promote the oxidation of elemental mercury in pulverized-coal-fired flue gas. Oxidized mercury is removed downstream in wet flue gas desulfurization (FGD) absorbers and collected with the byproducts from the FGD system. The project was co-funded by EPRI, the Lower Colorado River Authority (LCRA), who also provided the host site, Great River Energy, Johnson Matthey, Southern Company, Salt River Project (SRP), the Tennessee Valley Authority (TVA), NRG Energy, Ontario Power and Westar. URS Group was the prime contractor and also provided cofunding. The scope of this project included installing and testing a gold-based catalyst upstream of one full-scale wet FGD absorber module (about 200-MW scale) at LCRA's Fayette Power Project (FPP) Unit 3, which fires Powder River Basin coal. Installation of the catalyst involved modifying the ductwork upstream of one of three wet FGD absorbers on Unit 3, Absorber C. The FGD system uses limestone reagent, operates with forced sulfite oxidation, and normally runs with two FGD modules in service and one spare. The full-scale catalyst test was planned for 24 months to provide catalyst life data. Over the test period, data were collected on catalyst pressure drop, elemental mercury oxidation across the catalyst module, and mercury capture by the downstream wet FGD absorber. The demonstration period began on May 6, 2008 with plans for the catalyst to remain in service until May 5, 2010. However, because of continual increases in pressure drop across the catalyst and concerns that further increases would adversely affect Unit 3 operations, LCRA decided to end the demonstration early, during a planned unit outage. On October 2, 2009, Unit 3 was taken out of service for a fall outage and the catalyst upstream of Absorber C was removed. This ended the demonstration after approximately 17 months of the planned 24 months of operation. This report discusses reasons for the pressure drop increase and potential measures to mitigate such problems in any future application of this technology. Mercury oxidation and capture measurements were made on Unit 3 four times during the 17-month demonstration. Measurements were performed across the catalyst and Absorber C and 'baseline' measurements were performed across Absorber A or B, which did not have a catalyst upstream. Results are presented in the report from all four sets of measurements during the demonstration period. These results include elemental mercury oxidation across the catalyst, mercury capture across Absorber C downstream of the catalyst, baseline mercury capture across Absorber A or B, and mercury re-emissions across both absorbers in service. Also presented in the report are estimates of the average mercury control performance of the oxidation catalyst technology over the 17-month demonstration period and the resulting mercury control costs.

  17. The Phoenix Deep Survey: the clustering and the environment of Extremely Red Objects

    E-Print Network [OSTI]

    A. Georgakakis; J. Afonso; A. M. Hopkins; M. Sullivan; B. Mobasher; L. E. Cram

    2004-11-22

    In this paper we explore the clustering properties and the environment of the Extremely Red Objects (EROs; I-K>4mag) detected in a ~180arcmin^2 deep (Ks~20mag) Ks-band survey of a region within the Phoenix Deep Survey, an on-going multiwavelength program aiming to investigate the nature and the evolution of faint radio sources. Using our complete sample of 289 EROs brighter than Ks=20mag we estimate a statistically significant (~3.7sigma) angular correlation function signal with amplitude Aw=8.7^{+2.1}_{-1.7}x10^{-3} consistent with earlier work based on smaller samples. This amplitude suggests a clustering length in the range ro=12-17h^{-1}Mpc, implying that EROs trace regions of enhanced density. Using a novel method we further explore the association of EROs with galaxy overdensities by smoothing the K-band galaxy distribution using the matched filter algorithm of Postman et al. (1996) and then cross-correlating the resulting density maps with the ERO positions. Our analysis provides direct evidence that EROs are associated with overdensities at redshifts z>1. We also exploit the deep radio 1.4GHz data (limiting flux 60microJy) available to explore the association of EROs and faint radio sources and whether the two populations trace similar large scale structures. Cross-correlation of the two samples (after excluding 17EROs with radio counterparts) gives a 2sigma signal only for the sub-sample of high-z radio sources (z>0.6). Although the statistics are poor this suggests that it is the high-z radio sub-sample that traces similar structures with EROs.

  18. Gene expression patterns in the hippocampus during the development and aging of Glud1 (Glutamate Dehydrogenase 1) transgenic and wild type mice

    E-Print Network [OSTI]

    Wang, Xinkun; Patel, Nilam D.; Hui, Dongwei; Pal, Ranu; Hafez, Mohamed M.; Sayed-Ahmed, Mohamed M.; Al-Ujaya, Abdulaziz A.; Michaelis, Elias K.

    2014-03-04

    , 2099 Constant Ave., Lawrence, KS 66047, USA 2Alzheimer’s Disease Center, University of Kansas Medical Center, Kansas City,important in understanding the effects of glutamate dysrXinkun Wang1,2,3*, Nilam D Patel1, Dongwei Hui1,3, Ranu Pal1,3, Mohamed M... of axonal transport in the brain and hippocampus (P. Lee, R. Pal, X. Wang, I-Y. Choi, and E. K. Michaelis, unpublished observations). The other two key func- tions were Protein ubiquitination and degradation, and Mitochondrial structure and function, which...

  19. Physical activity across the curriculum: year one process evaluation results

    E-Print Network [OSTI]

    Gibson, Cheryl A.; Smith, Bryan K.; DuBose, Katrina D.; Greene, Leon; Bailey, Bruce W.; Williams, Shannon L.; Ryan, Joseph J.; Schmelzle, Kristin H.; Washburn, Richard A.; Sullivan, Debra K.; Mayo, Matthew S.; Donnelly, Joseph E.

    2008-01-01

    ral International Journal of Behavioral ssBioMed CentNutrition and Physical Activity Open AcceResearch Physical activity across the curriculum: year one process evaluation results Cheryl A Gibson*1, Bryan K Smith2, Katrina D DuBose3, J Leon Greene... of Biostatistics, University of Kansas School of Medicine, 3901 Rainbow Blvd, Mail Stop 1026, Kansas City, KS, 66160, USA Email: Cheryl A Gibson* - cgibson@kumc.edu; Bryan K Smith - smithbr@ku.edu; Katrina D DuBose - dubose@ecu.edu; J Leon Greene - jlg...

  20. In situ transmission electron microscopy investigation of the interfacial reaction between Ni and Al during rapid heating in a nanocalorimeter

    SciTech Connect (OSTI)

    Grapes, Michael D., E-mail: mgrapes1@jhu.edu, E-mail: david.lavan@nist.gov, E-mail: weihs@jhu.edu [Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland 21218 (United States); Material Measurement Laboratory, Materials Measurement Science Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States); LaGrange, Thomas; Reed, Bryan W.; Campbell, Geoffrey H. [Lawrence Livermore National Laboratory, Materials Science and Technology Division, Livermore, California 94550 (United States); Woll, Karsten [Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland 21218 (United States); Institute of Applied Materials, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen (Germany); LaVan, David A., E-mail: mgrapes1@jhu.edu, E-mail: david.lavan@nist.gov, E-mail: weihs@jhu.edu [Material Measurement Laboratory, Materials Measurement Science Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States); Weihs, Timothy P., E-mail: mgrapes1@jhu.edu, E-mail: david.lavan@nist.gov, E-mail: weihs@jhu.edu [Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland 21218 (United States)

    2014-11-01

    The Al/Ni formation reaction is highly exothermic and of both scientific and technological significance. In this report, we study the evolution of intermetallic phases in this reaction at a heating rate of 830 K/s. 100-nm-thick Al/Ni bilayers were deposited onto nanocalorimeter sensors that enable the measurement of temperature and heat flow during rapid heating. Time-resolved transmission electron diffraction patterns captured simultaneously with thermal measurements allow us to identify the intermetallic phases present and reconstruct the phase transformation sequence as a function of time and temperature. The results show a mostly unaltered phase transformation sequence compared to lower heating rates.

  1. A Near-Infrared Photometric Study of the Low Latitude Globular Clusters Liller 1, Djorgovski 1, HP 1, and NGC 6528

    E-Print Network [OSTI]

    T. J. Davidge

    1999-09-23

    Images recorded through J, H, Ks, 2.2 micron continuum, and 2.3 micron CO filters are used to investigate the stellar contents of the low Galactic latitude globular clusters NGC 6528, Liller 1, Djorgovski 1, and HP 1, as well as surrounding bulge fields. Metallicities are estimated for the latter three clusters by comparing the colors and CO indices of giant branch stars with those in other clusters and the bulge, while reddenings are estimated from the colors of bright bulge stars in the surrounding fields. In some cases the metallicities and reddenings are significantly different from previous estimates.

  2. Confronting Dilaton-exchange gravity with experiments

    E-Print Network [OSTI]

    H. V. Klapdor-Kleingrothaus; H. Päs; U. Sarkar

    2000-08-16

    We study the experimental constraints on theories, where the equivalence principle is violated by dilaton-exchange contributions to the usual graviton-exchange gravity. We point out that in this case it is not possible to have any CPT violation and hence there is no constraint from the CPT violating measurements in the $K-$system. The most stringent bound is obtained from the $K_L - K_S$ mass difference. In contrast, neither neutrino oscillation experiments nor neutrinoless double beta decay imply significant constraints.

  3. Comparison of heavy ion-induced K? x-ray satellite spectra from gases and solids 

    E-Print Network [OSTI]

    Demarest, John Allen

    1977-01-01

    COMPARISON OF HEAVY ION-INDUCED IQX X-RAY SATELLITE SPECTRA FROM GASES AND SOLIDS A Thesis by JOHN ALLEN DEMAREST Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE December 1977 Ma)or Subject: Chemistry COMPARISON OF HEAVY ION-INDUCED Ks X-RAY SATELLITE SPECTRA FROM GASES AND SOLIDS A Thesis by JOHN ALLEN DEMAREST Approved as to style and content by (Chairman of Committee) 7&F~. ~MA (Head...

  4. Early Permian Carbonitidae (Ostracoda): ontogeny, affinity, environment and systematics

    E-Print Network [OSTI]

    Retrum, Julie Beth; Kaesler, R. L.

    2005-10-01

    (Ostracoda): ontogeny, a?nity, environment and systematics JULIE B. RETRUM 1 & ROGER L. KAESLER 1, 2 1 Department of Geology, University of Kansas, 1475 Jawhawk Blvd., Room 120, Lawrence KS 66045-7613, USA 2 Paleontological Institute and Natural History...,136,671 to 1,137,077. Specimens with the prefix NHM are in the Natural History Museum, London. J. B. Retrum & R. L. Kaesler 186 Phylum Arthropoda Siebold & Stannius, 1845 Class Crustacea Pennant, 1777 Subclass Ostracoda Latreille, 1806 Order Podocopida M...

  5. An unusual xylan in Arabidopsis primary cell walls is synthesised by GUX3, IRX9L, IRX10L and IRX14

    E-Print Network [OSTI]

    Mortimer, Jenny; Blanc, Nuno; Yu, Xiaolan; Tryfona, Theodora; Sorieul, Mathias; Ng, Yao Zong; Zhang, Zhinong; Stott, Katherine; Anders, Nadine; Dupree, Paul

    2015-06-04

    complex phenolic network, is deposited (Scheller and Ulvskov 2010). Xylan is an essential component of these secondary cell walls, since Arabidopsis xylan biosynthesis mutants have collapsed xylem vessels and if there is a complete loss of xylan... .ac.uk Nadine Anders: na336@cam.ac.uk Mathias Sorieul: mrs66@cam.ac.uk Andy Ng: yn2231@columbia.edu Xiaolan Yu: xly20@cam.ac.uk Katherine Stott: ks123@cam.ac.uk Paul Dupree: p.dupree@bioc.cam.ac.uk Running title: Primary cell wall xylan biosynthesis...

  6. Solvation studies on anion radicals of alkyl nitrobenzene derivatives in acetonitrile-alkyl alcohol solvent mixtures at 25 p0 sC 

    E-Print Network [OSTI]

    Chu, William Wen-Chen

    1970-01-01

    the coef- ficients al through a& 1 and Kl through K& for the formula (1) 1 2K1 1 + a3K1K2D2 ''' + t+1 I a (1) 1 + K1Dl K1K2 2 + ~ + K1K2' 'KS where a is the experimentally measured nitrogen hyperfine constant. Dl through D are functions of activities... of solvation complexes Rl through R&+i. Kl through K are equilibrium constants of solvation steps for i = '1 through s, e. q. step 1 through step s. is the number of solvation steps. Usually we apply a least squares approximation to determine...

  7. No Leafcaster? No Problem! Using the suction table to fill large lacunae in an entire volume

    E-Print Network [OSTI]

    Baker, Whitney

    2005-07-22

    stream_size 4814 stream_content_type text/plain stream_name iowa poster 2005 small.pdf.txt stream_source_info iowa poster 2005 small.pdf.txt Content-Encoding ISO-8859-1 Content-Type text/plain; charset=ISO-8859...-1 No Leafcaster? No Problem! Using the Suction Table to Fill Large Lacunae in an Entire Volume Whitney Baker, Conservator, University of Kansas Libraries, Lawrence, KS 66045, wbaker@ku.edu C a s e S t u d y W o r k f l o w R e s u l t s CONDITION OF ITEM The 17...

  8. Measurements and Comparisons of Sunlighted and North-Lighted Atriums on Two Office Buildings in Dallas, Texas 

    E-Print Network [OSTI]

    Molinelli, J. F.; Kim, K.

    1986-01-01

    edition, John Wiley & Sona, N.Y., 1986, PP. 936-945. 4. Navvab. Yoltaba and S. Selkowitz. "Daylighting ~ata for Atrium Design," & 9th Natl. Passive Solar Conf., Columbus, OH, Amer. Solar. Energy Soc., Sept., 1984, PP. 5. Boyer, L.L., and L....O. Degelman, "Development of Streamlined Performance Algorithms for Lightshelves and Atriums in Buildings," Proc. 2nd Intl. Daylighting Conf., Long Beach, CA, Nov. 1986. 6. Kim, K.S., and L.L. Boyer, "Development of Daylighting Predict ion Yethods...

  9. Periodic Photometric Variability in the Becklin-Neugebauer Object

    E-Print Network [OSTI]

    Lynne A. Hillenbrand; John M. Carpenter; M. F. Skrutskie

    2000-10-24

    The Becklin-Neugebauer (BN) object in the Orion Nebula Cluster (ONC) is a well-studied optically invisible, infrared-bright young stellar object, thought to be an intermediate-mass protostar. We report here that BN exhibited nearly-sinusoidal periodic variability at the near-infrared H- and Ks-bands during a one month observing campaign in 2000 March/April. The period was 8.28 days and the peak-to-peak amplitude ~0.2 mag. Plausible mechanisms for producing the observed variability characteristics are explored.

  10. The Small-scale Structure of N103B - Nature of Nuture?

    E-Print Network [OSTI]

    Karen T. Lewis; David N. Burrows; John P. Hughes; Patrick Slane; Gordon P. Garmire; John A. Nousek

    2001-08-24

    We present new results from a 40.8 ks Chandra ACIS observation of the young supernova remnant (SNR) N103B located in the Large Magellanic Cloud. The high resolution Chandra image reveals structure at the sub-arcsecond level, including several bright knots and filaments. Narrow-band imaging and spatially resolved spectroscopy reveal dramatic spectral variations in this remnant as well. In this paper we discuss whether these variations are due to inhomogeneities in the surrounding environment or were generated in the explosion which created the SNR.

  11. Teaching China GATT

    E-Print Network [OSTI]

    Bhala, Raj

    2009-01-01

    , Heenan Blaikie, LLP, Canada. Address: Green Hall, 1535 West 15 th Street, Lawrence, KS 66045-7577 USA. Telephone: +785-864-9224. Fax: +785-864-5054. E-mail: bhala[at]ku.edu. The author is grateful to his Research Assistant, Mr. Ben Sharp (J... 2009, at 3. 3 See John Reed & Bernard Simon, The Thrill is Gone, FINANCIAL TIMES, 3 February 2009, at 9; Jonathan Lynn, UPDATE 2 – China Loses WTO Appeal in Car Parts Dispute, REUTERS, 15 December 2008, available at www.reuters.com. See also...

  12. Biogeochemistry of manganese in Lake Matano, Indonesia

    E-Print Network [OSTI]

    Jones, C.; Crowe, S. A.; Sturm, A.; Leslie, Karla Louise; MacLean, L. C. W.; Katsev, S.; Henny, C.; Fowle, David A.; Canfield, D. E.

    2011-10-26

    . L. Leslie2, L. C. W. MacLean3, S. Katsev4, C. Henny5, D. A. Fowle2, and D. E. Canfield1 1Nordic Center for Earth Evolution, Institute of Biology, Univ. of Southern Denmark, Campusvej 55, 5230 Odense, Denmark 2Dept. of Geology, Univ. of Kansas..., Lawrence, KS 66047, USA 3Canadian Light Source Inc., Univ. of Saskatchewan, Saskatoon, SK S7N 0X4, Canada 4Large Lakes Observatory and Dept. of Physics, Univ. of Minnesota, Duluth MN 55812, USA 5Research Center for Limnology, Indonesian Institute...

  13. Calorimetric and Resistive Measurements of Amorphous Splat Cooled La1-Xgax Foils 

    E-Print Network [OSTI]

    SHULL, WH; Naugle, Donald G.; POON, SJ; JOHNSON, WL.

    1978-01-01

    VOLUME 18, NUMBER 7 1 OCTOBER 1978 Calorimetric and resistive measurements of amorphous "splat cooled" Lat Ga? foils %. H. Shull' and D. G. Naugle Texax Ad'cM University, College Station, Texas 77843 and S. J. Poon~ and W. L. Johnson 8'. M. Keck...- stants as large as 2.4 values of 2he/ks T, around 4.5; (ii) the electronic properties are well described by the simple free-electron model with the exception of the alloy systems of Bi and Pb which appear to be more complicated; and (iii) n'(re) F...

  14. Re-Building Greensburg

    ScienceCinema (OSTI)

    Hewitt, Steven; Wallach, Daniel; Peterson, Stephanie;

    2013-05-29

    Greensburg, KS - A town that was devastated by a tornado in 2007, yet came back to be one of the Nation's most energy-efficient, sustainable communities. Civic leaders and entrepreneurs helped rally residents behind the idea of "greening" Greensburg, inspiring the construction of numerous energy-efficient buildings, some of which generate their own renewable power with solar panels and wind turbines. Many of the town's government buildings use cutting edge energy-saving technologies, saving the local taxpayers' money. Greensburg has demonstrated to the world that any city can reach its energy efficiency and renewable energy goals today using widely available technologies.

  15. ON THE KENNICUTT-SCHMIDT RELATION OF LOW-METALLICITY HIGH-REDSHIFT GALAXIES

    SciTech Connect (OSTI)

    Gnedin, Nickolay Y. [Particle Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, IL 60510 (United States); Kravtsov, Andrey V., E-mail: gnedin@fnal.go, E-mail: andrey@oddjob.uchicago.ed [Department of Astronomy and Astrophysics, University of Chicago, Chicago, IL 60637 (United States)

    2010-05-01

    We present results of self-consistent, high-resolution cosmological simulations of galaxy formation at z {approx} 3. The simulations employ a recently developed recipe for star formation based on the local abundance of molecular hydrogen, which is tracked self-consistently during the course of simulation. The phenomenological H{sub 2} formation model accounts for the effects of dissociating UV radiation of stars in each galaxy, as well as self-shielding and shielding of H{sub 2} by dust, and therefore allows us to explore effects of lower metallicities and higher UV fluxes prevalent in high-redshift galaxies on their star formation. We compare stellar masses, metallicities, and star formation rates of the simulated galaxies to available observations of the Lyman break galaxies (LBGs) and find a reasonable agreement. We find that the Kennicutt-Schmidt (KS) relation exhibited by our simulated galaxies at z {approx} 3 is substantially steeper and has a lower amplitude than the z = 0 relation at {Sigma}{sub H} {approx_lt} 100 M{sub o-dot} pc{sup -2}. The predicted relation, however, is consistent with existing observational constraints for the z {approx} 3 damped Ly{alpha} and LBGs. Our tests show that the main reason for the difference from the local KS relation is lower metallicity of the interstellar medium in high-redshift galaxies. We discuss several implications of the metallicity-dependence of the KS relation for galaxy evolution and interpretation of observations. In particular, we show that the observed size of high-redshift exponential disks depends sensitively on their KS relation. Our results also suggest that significantly reduced star formation efficiency at low gas surface densities can lead to strong suppression of star formation in low-mass high-redshift galaxies and long gas consumption time scales over most of the disks in large galaxies. The longer gas consumption time scales could make disks more resilient to major and minor mergers and could help explain the prevalence of the thin stellar disks in the local universe.

  16. Performing statistical analyses on quantitative data in Taverna workflows: an example using R and maxdBrowse to identify differentially-expressed genes from microarray data

    E-Print Network [OSTI]

    Li, Peter; Castrillo, Juan I.; Velarde, Giles; Wassink, Ingo; Soiland-Reyes, Stian; Owen, Stuart; Withers, David; Oinn, Tom; Pocock, Matthew R.; Goble, Carole A.; Oliver, Stephen G.; Kell, Douglas B.

    2008-08-07

    analysis protocols, which are then employed by colleagues who are laboratory scientists. This labora- tory group of scientists understand the conceptual basis of the analysis performed by the R script but may not have the inclination (or the need) to learn... WB, Broadhurst D, O' Donoghue K, Hester SS, Dunkley TPJ, Hart SR, Swainston N, Li P, Gaskell SJ, Paton NW, Lilley KS, Kell DB, Oliver SG: Growth control of the eukaryote cell: A systems biology study in yeast. Journal of Biology 2007, 6:4. 2. Ishii N...

  17. Charles McVey Oral History

    E-Print Network [OSTI]

    McVey, Charles; Albin, Tami

    2009-12-17

    of GLBTIQ People in Kansas Anschutz Library 1301 Hoch Auditoria Dr., University of Kansas Lawrence, KS 66045 Requestors must identify: 1. Type of publication 2. Proposed title 3. Specific passages to be quoted 4. Anticipated uses of the passages... set me up with these gigs at like church and—m aybe that was a little bit later that that got more involved—b ut that and like the Smoky Hill River Festival, and I had performance commitments at an early age. ( laughter) AL BIN : Wow, so are you...

  18. Track Finding Efficiency in BaBar

    E-Print Network [OSTI]

    T. Allmendinger; B. Bhuyan; D. N. Brown; H. Choi; S. Christ; R. Covarelli; M. Davier; A. G. Denig; M. Fritsch; A. Hafner; R. Kowalewski; O. Long; A. M. Lutz; M. Martinelli; D. R. Muller; I. M. Nugent; D. Lopes Pegna; M. V. Purohit; E. Prencipe; J. M. Roney; G. Simi; E. P. Solodov; A. V. Telnov; E. Varnes; R. Waldi; W. F. Wang; R. M. White

    2012-07-12

    We describe several studies to measure the charged track reconstruction efficiency and asymmetry of the BaBar detector. The first two studies measure the tracking efficiency of a charged particle using $\\tau$ and initial state radiation decays. The third uses the $\\tau$ decays to study the asymmetry in tracking, the fourth measures the tracking efficiency for low momentum tracks, and the last measures the reconstruction efficiency of $K_S^0$ particles. The first section also examines the stability of the measurements vs BaBar running periods.

  19. State 2007 2008 2009 2010 2011 2012 Alabama 16 13 6 9 7 7 -56%

    E-Print Network [OSTI]

    Fernandez, Eduardo

    3 CA 50 OR 5 WA 13 WY 0 ND 5 SD 0 NE 9 KS 5 OK 7 MN 14 WI 12 MI 43 IA 7 MO 19 IL 55 AR 4 AL 7 AK 2 5 6 200% Vermont 5 6 6 5 6 9 80% Virginia 38 40 41 45 49 52 37% Washington 8 8 6 12 13 13 63% West Virginia 6 7 4 2 6 7 17% Wisconsin 10 13 17 18 19 12 20% Wyoming 0 0 0 1 0 0 0% Total States 26,166 26

  20. Lattice Boltzmann Model for Electronic Structure Simulations

    E-Print Network [OSTI]

    Mendoza, M; Succi, S

    2015-01-01

    Recently, a new connection between density functional theory and kinetic theory has been proposed. In particular, it was shown that the Kohn-Sham (KS) equations can be reformulated as a macroscopic limit of the steady-state solution of a suitable single-particle kinetic equation. By using a discrete version of this new formalism, the exchange and correlation energies of simple atoms and the geometrical configuration of the methane molecule were calculated accurately. Here, we discuss the main ideas behind the lattice kinetic approach to electronic structure computations, offer some considerations for prospective extensions, and also show additional numerical results, namely the geometrical configuration of the water molecule.

  1. Lattice Boltzmann Model for Electronic Structure Simulations

    E-Print Network [OSTI]

    M. Mendoza; H. J. Herrmann; S. Succi

    2015-07-28

    Recently, a new connection between density functional theory and kinetic theory has been proposed. In particular, it was shown that the Kohn-Sham (KS) equations can be reformulated as a macroscopic limit of the steady-state solution of a suitable single-particle kinetic equation. By using a discrete version of this new formalism, the exchange and correlation energies of simple atoms and the geometrical configuration of the methane molecule were calculated accurately. Here, we discuss the main ideas behind the lattice kinetic approach to electronic structure computations, offer some considerations for prospective extensions, and also show additional numerical results, namely the geometrical configuration of the water molecule.

  2. Modulated wave trains in generalized Kuramoto-Sivashinksi equations

    E-Print Network [OSTI]

    Noble, Pascal

    2010-01-01

    This paper is concerned with the stability of periodic wave trains in a generalized Kuramoto-Sivashinski (gKS) equation. This equation is useful to describe the weak instability of low frequency perturbations for thin film flows down an inclined ramp. We provide a set of equations, namely Whitham's modulation equations, that determines the behaviour of low frequency perturbations of periodic wave trains. As a byproduct, we relate the spectral stability in the small wavenumber regime to properties of the modulation equations. This stability is always critical since 0 is a 0-Floquet number eigenvalue associated to translational invariance.

  3. Chandra Orion Ultradeep Project: Observations and Source Lists

    E-Print Network [OSTI]

    Getman, K V; Broos, P S; Grosso, N; Tsujimoto, M; Townsley, L K; Garmire, G P; Kästner, J H; Li, J; Harnden, F R; Wolk, S; Murray, S S; Lada, C J; Münch, A; McCaughrean, M J; Meeus, G; Damiani, F; Micela, G; Sciortino, S; Bally, J; Hillenbrand, L A; Herbst, W; Preibisch, T; Feigelson, E D

    2004-01-01

    We present a description of the data reduction methods and the derived catalog of more than 1600 X-ray point sources from the exceptionally deep January 2003 Chandra X-ray Observatory observation of the Orion Nebula Cluster and embedded populations around OMC-1. The observation was obtained with Chandra's Advanced CCD Imaging Spectrometer (ACIS) and has been nicknamed the Chandra Orion Ultradeep Project (COUP). With an 838 ks exposure made over a continuous period of 13.2 days, the COUP observation provides the most uniform and comprehensive dataset on the X-ray emission of normal stars ever obtained in the history of X-ray astronomy.

  4. Review of low-mass X-ray binaries near the Galactic center

    E-Print Network [OSTI]

    Lutovinov, A; Molkov, S; Sunyaev, R A

    2003-01-01

    Results of observations of several LMXBs in the Galactic center region carried out with the ART-P telescope on board \\Granat observatory are briefly reviewed. More than dozen sources were revealed in this region during five series of observations which were performed with the ART-P telescope in 1990-1992. The investigation of the spectral evolution of persistent emission of two X-ray bursters GX3+1 and KS1731-260, discussion of QPO and spectral variations detected from the very bright Z-source GX5-1 and studying the pulse profile changes of the pulsar GX1+4 were carried out.

  5. STAG UK Newsletter Issue 39 

    E-Print Network [OSTI]

    1980-01-01

    cards, ;Ie Here sorry we couldn't send you all one. 2 11e would like to take this opportunity to welcome all our new members. He hope you will enjoy being in STAG. fe,:ll Ji.:~y li:0;:; know 11hb James T. is - he's a very important member of STAG..., tapes, bOl)ks, cards etc. I have seen some of her blooper photographs, and they really are worth getting. For details of full range of items, send an addressed envelope and 2 IRCs to Liz Bowling, 998 E San Antonio, San Jose, Cll 9.5116, U...

  6. Surface Mean-Square Amplitudes of Vibration for Nacl 

    E-Print Network [OSTI]

    CHEN, TS; Alldredg, GP; Allen, Roland E.; WETTE, FWD.

    1972-01-01

    " in low-energy electron diffraction (LEED). In the present paper we report calculations of the mean-square ampli- tudes and mean-square velocities for the (100) surface of NaC1. We will distinguish the Na' and Cl ions by a la- bel w and use a label... expressions coth[If&o, (j)/2ks T] ~,(q) x coth h'tc (q) 'l B M? is the mass of an ion labeled by w, N is the number of values of the two-dimensional wave vec- tor q in the summation, P is a label which distin- guishes the different vibrational modes...

  7. Chandra Orion Ultradeep Project: Observations and Source Lists

    E-Print Network [OSTI]

    K. V. Getman; E. Flaccomio; P. S. Broos; N. Grosso; M. Tsujimoto; L. Townsley; G. P. Garmire; J. Kastner; J. Li; F. R. Harnden, Jr.; S. Wolk; S. S. Murray; C. J. Lada; A. A. Muench; M. J. McCaughrean; G. Meeus; F. Damiani; G. Micela; S. Sciortino; J. Bally; L. A. Hillenbrand; W. Herbst; T. Preibisch; E. D. Feigelson

    2004-10-06

    We present a description of the data reduction methods and the derived catalog of more than 1600 X-ray point sources from the exceptionally deep January 2003 Chandra X-ray Observatory observation of the Orion Nebula Cluster and embedded populations around OMC-1. The observation was obtained with Chandra's Advanced CCD Imaging Spectrometer (ACIS) and has been nicknamed the Chandra Orion Ultradeep Project (COUP). With an 838 ks exposure made over a continuous period of 13.2 days, the COUP observation provides the most uniform and comprehensive dataset on the X-ray emission of normal stars ever obtained in the history of X-ray astronomy.

  8. Discovery of 16.6 and 25.5 s Pulsations from the Small Magellanic Cloud

    E-Print Network [OSTI]

    R. C. Lamb; D. J. Macomb; T. A. Prince; W. A. Majid

    2001-12-14

    We report the serendipitous detection of two previously unreported pulsars from the direction of the Small Magellanic Cloud, with periods of 16.6 and 25.5 seconds. The detections are based on archival PCA data from the Rossi X-ray Timing Explorer (RXTE). The observation leading to these detections occurred in September 2000 extending over 2.1 days with an exposure of 121 ks. A possible identification of the 16.6 s pulsar with an X-ray source RX J0051.8-7310 seen by both ROSAT and ASCA imaging X-ray satellites is presented.

  9. Novel Strategies in Cancer Prevention and Fertility Preservation with Tamoxifen

    E-Print Network [OSTI]

    Ting, Alison

    2009-04-23

    Age 21-48 Grape Seed Extract Natural compound I Age 40-75 Green Tea Extract (EGCG) Natural compound I Age 21-65 White Button Mushroom Extract Natural compound I Age 21 and over Currently, the SERMs tamoxifen and raloxifene have been shown... were subsequently treated with mammary carcinogens: DMBA (10 mg/kg, p.o.), MNU (50 mg/kg, i.p.), or 17?- estradiol (E 2 , 3.0 mg, pellet implant; Hormone Pellet Press, Leawood, KS). Rats (n=12) receiving vehicle-coated sutures were further treated...

  10. DOE - Office of Legacy Management -- Spencer Chemical Co - MO 0-01

    Office of Legacy Management (LM)

    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 NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbins and Myers Co - OH 51SavannahMillKS 0-01 FUSRAPMO

  11. DOE - Office of Legacy Management -- Sperry Products Inc - CT 07

    Office of Legacy Management (LM)

    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 NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbins and Myers Co - OH 51SavannahMillKS 0-01

  12. DOE - Office of Legacy Management -- Spook

    Office of Legacy Management (LM)

    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 NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbins and Myers Co - OH 51SavannahMillKS 0-01Wyoming

  13. DOE - Office of Legacy Management -- Spook Site - WY 0-01

    Office of Legacy Management (LM)

    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 NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbins and Myers Co - OH 51SavannahMillKS 0-01WyomingSpook

  14. DOE - Office of Legacy Management -- Springdale_FUSRAP

    Office of Legacy Management (LM)

    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 NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbins and Myers Co - OH 51SavannahMillKS

  15. Controlled Source Audio MT At Mccoy Geothermal Area (DOE GTP) | Open Energy

    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:QA J-E-1 SECTIONRobertsdale, Alabama (Utility Company)| Open(Evans, EtInformation Control of Well KS-8 in

  16. Controlled Source Audio MT | 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:QA J-E-1 SECTIONRobertsdale, Alabama (Utility Company)| Open(Evans, EtInformation Control of Well KS-8 inSource

  17. Controlled Source Frequency-Domain Magnetics | Open Energy Information

    Open Energy Info (EERE)

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  18. Category:Grant Programs | 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:QA J-E-1 SECTION J APPENDIX ECoopButte County,Camilla, Georgia:Geothermal Regulatory Roadmap Sections JumpKS

  19. EIS-0407: Abengoa Biomass Bioenergy Project near Hugoton, Stevens County,

    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:FinancingPetroleum Based|Department of5Department oftoStatement |Scoping EIS-0403:-SA-01:KS |

  20. EIS-0407: Amended Notice of Intent to Modify the Scope of the Environmental

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

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  1. EIS-0407: DOE Notice of Availability of the Draft Environmental Impact

    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:FinancingPetroleum Based|Department of5Department oftoStatement |Scoping EIS-0403:-SA-01:KS

  2. Quiescent thermal emission from neutron stars in LMXBs

    E-Print Network [OSTI]

    Anabela Turlione; Deborah N. Aguilera; José A. Pons

    2015-02-19

    We monitored the quiescent thermal emission from neutron stars in low-mass X-ray binaries after active periods of intense activity in x-rays (outbursts). The theoretical modeling of the thermal relaxation of the neutron star crust may be used to establish constraints on the crust composition and transport properties, depending on the astrophysical scenarios assumed. We numerically simulated the thermal evolution of the neutron star crust and compared them with inferred surface temperatures for five sources: MXB 1659-29, KS 1731-260, EXO 0748-676, XTE J1701-462 and IGR J17480-2446. We find that the evolution of MXB 1659-29, KS 1731-260 and EXO 0748-676 can be well described within a deep crustal cooling scenario. Conversely, we find that the other two sources can only be explained with models beyond crustal cooling. For the peculiar emission of XTE J1701-462 we propose alternative scenarios such as residual accretion during quiescence, additional heat sources in the outer crust, and/or thermal isolation of the inner crust due to a buried magnetic field. We also explain the very recent reported temperature of IGR J17480-2446 with an additional heat deposition in the outer crust from shallow sources.

  3. THE Q/U IMAGING EXPERIMENT INSTRUMENT

    SciTech Connect (OSTI)

    Bischoff, C.; Brizius, A.; Buder, I.; Kusaka, A.; Smith, K. M.; Bogdan, M. [Kavli Institute for Cosmological Physics, Department of Physics, Enrico Fermi Institute, The University of Chicago, Chicago, IL 60637 (United States); Chinone, Y. [High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan); Cleary, K.; Reeves, R. [Cahill Center for Astronomy and Astrophysics, California Institute of Technology, 1200 E. California Blvd M/C 249-17, Pasadena, CA 91125 (United States); Dumoulin, R. N.; Newburgh, L. B. [Department of Physics and Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027 (United States); Monsalve, R.; Bustos, R. [Department of Physics, University of Miami, 1320 Campo Sano Drive, Coral Gables, FL 33146 (United States); Naess, S. K. [Institute of Theoretical Astrophysics, University of Oslo, P.O. Box 1029 Blindern, N-0315 Oslo (Norway); Nixon, G. [Joseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544 (United States); Vanderlinde, K. [Department of Physics, McGill University, 3600 Rue University, Montreal, Quebec H3A 2T8 (Canada); Wehus, I. K. [Department of Physics, University of Oslo, P.O. Box 1048 Blindern, N-0316 Oslo (Norway); Church, S. E. [Kavli Institute for Particle Astrophysics and Cosmology and Department of Physics, Stanford University, Varian Physics Building, 382 Via Pueblo Mall, Stanford, CA 94305 (United States); Davis, R.; Dickinson, C., E-mail: newburgh@princeton.edu [Jodrell Bank Centre for Astrophysics, Alan Turing Building, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL (United Kingdom); and others

    2013-05-01

    The Q/U Imaging ExperimenT (QUIET) is designed to measure polarization in the cosmic microwave background, targeting the imprint of inflationary gravitational waves at large angular scales({approx}1 Degree-Sign ). Between 2008 October and 2010 December, two independent receiver arrays were deployed sequentially on a 1.4 m side-fed Dragonian telescope. The polarimeters that form the focal planes use a compact design based on high electron mobility transistors (HEMTs) that provides simultaneous measurements of the Stokes parameters Q, U, and I in a single module. The 17-element Q-band polarimeter array, with a central frequency of 43.1 GHz, has the best sensitivity (69 {mu}Ks{sup 1/2}) and the lowest instrumental systematic errors ever achieved in this band, contributing to the tensor-to-scalar ratio at r < 0.1. The 84-element W-band polarimeter array has a sensitivity of 87 {mu}Ks{sup 1/2} at a central frequency of 94.5 GHz. It has the lowest systematic errors to date, contributing at r < 0.01. The two arrays together cover multipoles in the range l {approx} 25-975. These are the largest HEMT-based arrays deployed to date. This article describes the design, calibration, performance, and sources of systematic error of the instrument.

  4. n-Alkanes on MgO(100). I: Coverage-Dependent Desorption Kinetics of n-Butane

    SciTech Connect (OSTI)

    Tait, Steven L.; Dohnalek, Zdenek; Campbell, C T.; Kay, Bruce D.

    2005-04-22

    High quality temperature programmed desorption (TPD) measurements of n-butane from MgO(100) have been made for a large number of initial butane coverages (0-3.70 ML) and a wide range of heating ramp rates (0.3-10 K/s). We present a TPD analysis technique which allows the coverage-dependent desorption energy to be accurately determined by mathematical inversion of a TPD spectrum, assuming only that the prefactor is coverage-independent. A variational method is used to determine the prefactor that minimizes the difference between a set of simulated TPD spectra and corresponding experimental data. The best fit for butane desorption from MgO is obtained with a prefactor of 1015.7?1.6 s-1. The desorption energy is 34.9?3.4 kJ/mol at 0.5 ML coverage, and varies with coverage. Simulations based on these results can accurately reproduce TPD experiments for submonolayer initial coverages over a wide range of heating ramp rates (0.3-10 K/s). Advantages and limitations of this method are discussed.

  5. Combining nanocalorimetry and dynamic transmission electron microscopy for in situ characterization of materials processes under rapid heating and cooling

    SciTech Connect (OSTI)

    Grapes, Michael D.; LaGrange, Thomas; Reed, Bryan W.; Campbell, Geoffrey H.; Friedman, Lawrence H.; LaVan, David A.; Weihs, Timothy P.

    2014-08-15

    Nanocalorimetry is a chip-based thermal analysis technique capable of analyzing endothermic and exothermic reactions at very high heating and cooling rates. Here, we couple a nanocalorimeter with an extremely fast in situ microstructural characterization tool to identify the physical origin of rapid enthalpic signals. More specifically, we describe the development of a system to enable in situ nanocalorimetry experiments in the dynamic transmission electron microscope (DTEM), a time-resolved TEM capable of generating images and electron diffraction patterns with exposure times of 30 ns–500 ns. The full experimental system consists of a modified nanocalorimeter sensor, a custom-built in situ nanocalorimetry holder, a data acquisition system, and the DTEM itself, and is capable of thermodynamic and microstructural characterization of reactions over a range of heating rates (10{sup 2} K/s–10{sup 5} K/s) accessible by conventional (DC) nanocalorimetry. To establish its ability to capture synchronized calorimetric and microstructural data during rapid transformations, this work describes measurements on the melting of an aluminum thin film. We were able to identify the phase transformation in both the nanocalorimetry traces and in electron diffraction patterns taken by the DTEM. Potential applications for the newly developed system are described and future system improvements are discussed.

  6. A HOT COCOON IN THE ULTRALONG GRB 130925A: HINTS OF A POPIII-LIKE PROGENITOR IN A LOW-DENSITY WIND ENVIRONMENT

    SciTech Connect (OSTI)

    Piro, Luigi; Troja, Eleonora; Kidd, Lauren A.; Ghisellini, Gabriele; Ricci, Roberto; Bannister, Keith; Fiore, Fabrizio; Piranomonte, Silvia; Wieringa, Mark H.

    2014-08-01

    GRB 130925A is a peculiar event characterized by an extremely long gamma-ray duration (?7 ks), as well as dramatic flaring in the X-rays for ?20 ks. After this period, its X-ray afterglow shows an atypical soft spectrum with photon index ? ? 4, as observed by Swift and Chandra, until ?10{sup 7} s, when XMM-Newton observations uncover a harder spectral shape with ? ? 2.5, commonly observed in gamma-ray burst (GRB) afterglows. We find that two distinct emission components are needed to explain the X-ray observations: a thermal component, which dominates the X-ray emission for several weeks, and a non-thermal component, consistent with a typical afterglow. A forward shock model well describes the broadband (from radio to X-rays) afterglow spectrum at various epochs. It requires an ambient medium with a very low-density wind profile, consistent with that expected from a low-metallicity blue supergiant (BSG). The thermal component has a remarkably constant size and a total energy consistent with those expected by a hot cocoon surrounding the relativistic jet. We argue that the features observed in this GRB (its ultralong duration, the thermal cocoon, and the low-density wind environment) are associated with a low metallicity BSG progenitor and, thus, should characterize the class of ultralong GRBs.

  7. ARM - Midlatitude Continental Convective Clouds (jensen-sonde)

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

    Jensen, Mike; Comstock, Jennifer; Genio, Anthony Del; Giangrande, Scott; Kollias, Pavlos

    A major component of the Mid-latitude Continental Convective Clouds Experiment (MC3E) field campaign was the deployment of an enhanced radiosonde array designed to capture the vertical profile of atmospheric state variables (pressure, temperature, humidity wind speed and wind direction) for the purpose of deriving the large-scale forcing for use in modeling studies. The radiosonde array included six sites (enhanced Central Facility [CF-1] plus five new sites) launching radiosondes at 3-6 hour sampling intervals. The network will cover an area of approximately (300)2 km2 with five outer sounding launch sites and one central launch location. The five outer sounding launch sites are: S01 Pratt, KS [ 37.7oN, 98.75oW]; S02 Chanute, KS [37.674, 95.488]; S03 Vici, Oklahoma [36.071, -99.204]; S04 Morris, Oklahoma [35.687, -95.856]; and S05 Purcell, Oklahoma [34.985, -97.522]. Soundings from the SGP Central Facility during MC3E can be retrieved from the regular ARM archive. During routine MC3E operations 4 radiosondes were launched from each of these sites (approx. 0130, 0730, 1330 and 1930 UTC). On days that were forecast to be convective up to four additional launches were launched at each site (approx. 0430, 1030, 1630, 2230 UTC). There were a total of approximately 14 of these high frequency launch days over the course of the experiment.

  8. Characterization of self-propagating formation reactions in Ni/Zr multilayered foils using reaction heats, velocities, and temperature-time profiles

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

    Barron, S. C.; Knepper, R.; Walker, N.; Weihs, T. P.

    2011-01-11

    We report on intermetallic formation reactions in vapor-deposited multilayered foils of Ni/Zr with 70 nm bilayers and overall atomic ratios of Ni:Zr, 2 Ni:Zr, and 7 Ni:2 Zr. The sequence of alloy phase formation and the stored energy is evaluated at slow heating rates (~1 K/s) using differential scanning calorimetry (DSC) traces to 725ºC. All three chemistries initially form a Ni-Zr amorphous phase which crystallizes first to the intermetallic NiZr. The heat of reaction to the final phase is 34-36 kJ/mol atom for all chemistries. Intermetallic formation reactions are also studied at rapid heating rates (greater than 105 K/s) inmore »high temperature, self-propagating reactions which can be ignited in these foils by an electric spark. We find that reaction velocities and maximum reaction temperatures (Tmax) are largely independent of foil chemistry at 0.6 ± 0.1 m/s and 1220 ± 50 K, respectively, and that the measured Tmax is more than 200 K lower than predicted adiabatic temperatures (Tad). The difference between Tmax and Tad is explained by the prediction that transformation to the final intermetallic phases occurs after Tmax and results in the release of 20-30 % of the total heat of reaction and a delay in rapid cooling.« less

  9. ARM - Midlatitude Continental Convective Clouds (jensen-sonde)

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

    Jensen, Mike; Comstock, Jennifer; Genio, Anthony Del; Giangrande, Scott; Kollias, Pavlos

    2012-01-19

    A major component of the Mid-latitude Continental Convective Clouds Experiment (MC3E) field campaign was the deployment of an enhanced radiosonde array designed to capture the vertical profile of atmospheric state variables (pressure, temperature, humidity wind speed and wind direction) for the purpose of deriving the large-scale forcing for use in modeling studies. The radiosonde array included six sites (enhanced Central Facility [CF-1] plus five new sites) launching radiosondes at 3-6 hour sampling intervals. The network will cover an area of approximately (300)2 km2 with five outer sounding launch sites and one central launch location. The five outer sounding launch sites are: S01 Pratt, KS [ 37.7oN, 98.75oW]; S02 Chanute, KS [37.674, 95.488]; S03 Vici, Oklahoma [36.071, -99.204]; S04 Morris, Oklahoma [35.687, -95.856]; and S05 Purcell, Oklahoma [34.985, -97.522]. Soundings from the SGP Central Facility during MC3E can be retrieved from the regular ARM archive. During routine MC3E operations 4 radiosondes were launched from each of these sites (approx. 0130, 0730, 1330 and 1930 UTC). On days that were forecast to be convective up to four additional launches were launched at each site (approx. 0430, 1030, 1630, 2230 UTC). There were a total of approximately 14 of these high frequency launch days over the course of the experiment.

  10. Preparation and structural characterization of FeCo epitaxial thin films on insulating single-crystal substrates

    SciTech Connect (OSTI)

    Nishiyama, Tsutomu; Ohtake, Mitsuru; Futamoto, Masaaki; Kirino, Fumiyoshi

    2010-05-15

    FeCo epitaxial films were prepared on MgO(111), SrTiO{sub 3}(111), and Al{sub 2}O{sub 3}(0001) single-crystal substrates by ultrahigh vacuum molecular beam epitaxy. The effects of insulating substrate material on the film growth process and the structures were investigated. FeCo(110){sub bcc} films grow on MgO substrates with two type domains, Nishiyama-Wassermann (NW) and Kurdjumov-Sachs (KS) relationships. On the contrary, FeCo films grown on SrTiO{sub 3} and Al{sub 2}O{sub 3} substrates include FeCo(111){sub bcc} crystal in addition to the FeCo(110){sub bcc} crystals with NW and KS relationships. The FeCo(111){sub bcc} crystal consists of two type domains whose orientations are rotated around the film normal by 180 deg. each other. The out-of-plane and the in-plane lattice spacings of FeCo(110){sub bcc} and FeCo(111){sub bcc} crystals formed on the insulating substrates are in agreement with those of the bulk Fe{sub 50}Co{sub 50} (at. %) crystal with small errors ranging between +0.2% and +0.4%, showing that the strains in the epitaxial films are very small.

  11. Phenomenology of reverse-shock emission in the optical afterglows of gamma-ray bursts

    SciTech Connect (OSTI)

    Japelj, J.; Kopa?, D.; Gomboc, A. [Faculty of Mathematics and Physics, University of Ljubljana, Jadranska ulica 19, SI-1000 Ljubljana (Slovenia); Kobayashi, S.; Harrison, R.; Virgili, F. J.; Mundell, C. G. [Astrophysics Research Institute, Liverpool John Moores University, Liverpool, L3 5RF (United Kingdom); Guidorzi, C. [Physics Departments, University of Ferrara, via Saragat 1, I-44122, Ferrara (Italy); Melandri, A., E-mail: jure.japelj@fmf.uni-lj.si, E-mail: andreja.gomboc@fmf.uni-lj.si [INAF Osservatorio Astronomico di Brera, via E. Bianchi 46, I-23807 Merate (Italy)

    2014-04-20

    We use a parent sample of 118 gamma-ray burst (GRB) afterglows, with known redshift and host galaxy extinction, to separate afterglows with and without signatures of dominant reverse-shock (RS) emission and to determine which physical conditions lead to a prominent reverse-shock emission. We identify 10 GRBs with reverse-shock signatures: 990123, 021004, 021211, 060908, 061126, 080319B, 081007, 090102, 090424, and 130427A. By modeling their optical afterglows with reverse- and forward-shock analytic light curves and using Monte Carlo simulations, we estimate the parameter space of the physical quantities describing the ejecta and circumburst medium. We find that physical properties cover a wide parameter space and do not seem to cluster around any preferential values. Comparing the rest-frame optical, X-ray, and high-energy properties of the larger sample of non-RS-dominated GRBs, we show that the early-time (<1 ks) optical spectral luminosity, X-ray afterglow luminosity, and ?-ray energy output of our reverse-shock dominated sample do not differ significantly from the general population at early times. However, the GRBs with dominant reverse-shock emission have fainter than average optical forward-shock emission at late times (>10 ks). We find that GRBs with an identifiable reverse-shock component show a high magnetization parameter R {sub B} = ?{sub B,r}/?{sub B,f} ? 2-10{sup 4}. Our results are in agreement with the mildly magnetized baryonic jet model of GRBs.

  12. Quasi-free Cross Section Measurements at CLAS: ? D ? p ? ? ( p ) , ? D ? K ? ( 892 ) 0 ? ( p ) , ? D ? K + ? ? ( 1385 ) ? ( p )

    SciTech Connect (OSTI)

    Mattione, Paul

    2014-09-01

    Preliminary measurements of the quasi-free differential cross sections of the gD -->pp-(p), gD --> K*(892)0L(p), and gD --> K+S*(1385)?(p) reactions are shown using data from the Jefferson Lab Hall B CLAS g13 experiment. No experimental cross section data have yet been published on gD --> K*(892)0L(p), and the only published cross section data on gD --> K+S*(1385)?(p) are at forward angles, where t-channel K+ and K*+ exchanges are predicted to dominate. These data can be used to contribute to the search for the "missing" N* resonances, some of which are predicted to have non-negligible couplings to the excited strangeness channels. These cross sections are shown to be sizable compared to the ground-state channels, indicating that it is important to include excited channels in coupled-channels analyses used to extract the N* resonances. In addition, the gD --> pp?(p) data provide a significant increase to the world statistics, and will be used to study rescattering effects within the deuteron.

  13. The QUIET Instrument

    SciTech Connect (OSTI)

    Bischoff, C.; et al.

    2012-07-01

    The Q/U Imaging ExperimenT (QUIET) is designed to measure polarization in the Cosmic Microwave Background, targeting the imprint of inflationary gravitational waves at large angular scales ({approx}1{sup o}). Between 2008 October and 2010 December, two independent receiver arrays were deployed sequentially on a 1.4m side-fed Dragonian telescope. The polarimeters which form the focal planes use a highly compact design based on High Electron Mobility Transistors (HEMTs) that provides simultaneous measurements of the Stokes parameters Q, U, and I in a single module. The 17-element Q-band polarimeter array, with a central frequency of 43.1 GHz, has the best sensitivity (69 {mu}Ks{sup 1/2}) and the lowest instrumental systematic errors ever achieved in this band, contributing to the tensor-to-scalar ratio at r < 0:1. The 84-element W-band polarimeter array has a sensitivity of 87 {mu}Ks{sup 1/2} at a central frequency of 94.5 GHz. It has the lowest systematic errors to date, contributing at r < 0:01. The two arrays together cover multipoles in the range {ell} {approx} 25 -- 975. These are the largest HEMT-based arrays deployed to date. This article describes the design, calibration, performance of, and sources of systematic error for the instrument.

  14. The absolute age of the globular cluster M15 using near-infrared adaptive optics images from PISCES/LBT

    E-Print Network [OSTI]

    Monelli, M; Bono, G; Ferraro, I; Iannicola, G; Fiorentino, G; Arcidiacono, C; Massari, D; Boutsia, K; Briguglio, R; Busoni, L; Carini, R; Close, L; Cresci, G; Esposito, S; Fini, L; Fumana, M; Guerra, J C; Hill, J; Kulesa, C; Mannucci, F; McCarthy, D; Pinna, E; Puglisi, A; Quiros-Pacheco, F; Ragazzoni, R; Riccardi, A; Skemer, A; Xompero, M

    2015-01-01

    We present deep near-infrared (NIR) J, Ks photometry of the old, metal-poor Galactic globular cluster M\\,15 obtained with images collected with the LUCI1 and PISCES cameras available at the Large Binocular Telescope (LBT). We show how the use of First Light Adaptive Optics system coupled with the (FLAO) PISCES camera allows us to improve the limiting magnitude by ~2 mag in Ks. By analyzing archival HST data, we demonstrate that the quality of the LBT/PISCES color magnitude diagram is fully comparable with analogous space-based data. The smaller field of view is balanced by the shorter exposure time required to reach a similar photometric limit. We investigated the absolute age of M\\,15 by means of two methods: i) by determining the age from the position of the main sequence turn-off; and ii) by the magnitude difference between the MSTO and the well-defined knee detected along the faint portion of the MS. We derive consistent values of the absolute age of M15, that is 12.9+-2.6 Gyr and 13.3+-1.1 Gyr, respectiv...

  15. Lyapunov instability of rough hard-disk fluids

    E-Print Network [OSTI]

    Jacobus A. van Meel; Harald A. Posch

    2009-04-02

    The dynamical instability of rough hard-disk fluids in two dimensions is characterized through the Lyapunov spectrum and the Kolmogorov-Sinai entropy, $h_{KS}$, for a wide range of densities and moments of inertia $I$. For small $I$ the spectrum separates into translation-dominated and rotation-dominated parts. With increasing $I$ the rotation-dominated part is gradually filled in at the expense of translation, until such a separation becomes meaningless. At any density, the rate of phase-space mixing, given by $h_{KS}$, becomes less and less effective the more the rotation affects the dynamics. However, the degree of dynamical chaos, measured by the maximum Lyapunov exponent, is only enhanced by the rotational degrees of freedom for high-density gases, but is diminished for lower densities. Surprisingly, no traces of Lyapunov modes were found in the spectrum for larger moments of inertia. The spatial localization of the perturbation vector associated with the maximum exponent however persists for any $I$.

  16. Characterization of self-propagating formation reactions in Ni/Zr multilayered foils using reaction heats, velocities, and temperature-time profiles

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

    Barron, S. C.; Knepper, R.; Walker, N.; Weihs, T. P.

    2011-01-11

    We report on intermetallic formation reactions in vapor-deposited multilayered foils of Ni/Zr with 70 nm bilayers and overall atomic ratios of Ni:Zr, 2 Ni:Zr, and 7 Ni:2 Zr. The sequence of alloy phase formation and the stored energy is evaluated at slow heating rates (~1 K/s) using differential scanning calorimetry (DSC) traces to 725ºC. All three chemistries initially form a Ni-Zr amorphous phase which crystallizes first to the intermetallic NiZr. The heat of reaction to the final phase is 34-36 kJ/mol atom for all chemistries. Intermetallic formation reactions are also studied at rapid heating rates (greater than 105 K/s) in high temperature, self-propagating reactions which can be ignited in these foils by an electric spark. We find that reaction velocities and maximum reaction temperatures (Tmax) are largely independent of foil chemistry at 0.6 ± 0.1 m/s and 1220 ± 50 K, respectively, and that the measured Tmax is more than 200 K lower than predicted adiabatic temperatures (Tad). The difference between Tmax and Tad is explained by the prediction that transformation to the final intermetallic phases occurs after Tmax and results in the release of 20-30 % of the total heat of reaction and a delay in rapid cooling.

  17. Sensitivity of the Properties of Ruthenium “Blue Dimer” to Method, Basis Set, and Continuum Model

    SciTech Connect (OSTI)

    Ozkanlar, Abdullah; Clark, Aurora E.

    2012-05-23

    The ruthenium “blue dimer” [(bpy)2RuIIIOH2]2O4+ is best known as the first well-defined molecular catalyst for water oxidation. It has been subject to numerous computational studies primarily employing density functional theory. However, those studies have been limited in the functionals, basis sets, and continuum models employed. The controversy in the calculated electronic structure and the reaction energetics of this catalyst highlights the necessity of benchmark calculations that explore the role of density functionals, basis sets, and continuum models upon the essential features of blue-dimer reactivity. In this paper, we report Kohn-Sham complete basis set (KS-CBS) limit extrapolations of the electronic structure of “blue dimer” using GGA (BPW91 and BP86), hybrid-GGA (B3LYP), and meta-GGA (M06-L) density functionals. The dependence of solvation free energy corrections on the different cavity types (UFF, UA0, UAHF, UAKS, Bondi, and Pauling) within polarizable and conductor-like polarizable continuum model has also been investigated. The most common basis sets of double-zeta quality are shown to yield results close to the KS-CBS limit; however, large variations are observed in the reaction energetics as a function of density functional and continuum cavity model employed.

  18. Infrared Fixed Point in the Strong Running Coupling: Unraveling the ?I=1/2 puzzle in K-Decays

    E-Print Network [OSTI]

    R. J. Crewther; Lewis C. Tunstall

    2013-06-19

    In this talk, we present an explanation for the Delta I = 1/2 rule in K-decays based on the premise of an infrared fixed point alpha_IR in the running coupling alpha_s of quantum chromodynamics (QCD) for three light quarks u,d,s. At the fixed point, the quark condensate spontaneously breaks scale and chiral SU(3)_L x SU(3)_R symmetry. Consequently, the low-lying spectrum contains nine Nambu-Goldstone bosons: pi,K,eta and a QCD dilaton sigma. We identify sigma as the f_0(500) resonance and construct a chiral-scale perturbation theory CHPT_sigma for low-energy amplitudes expanded in alpha_s about alpha_IR. The Delta I = 1/2 rule emerges in the leading order of CHPT_sigma through a sigma-pole term K_S --> sigma --> 2 pi, with a K_S-sigma coupling fixed by data on 2 gamma --> 2 pi^0 and K_S --> 2 gamma. We also determine R_IR ~ 5 for the nonperturbative Drell-Yan ratio at alpha_IR.

  19. Suzaku X-Ray Observation of the Dwarf Nova Z Camelopardalis at the Onset of an Optical Outburst

    E-Print Network [OSTI]

    Saitou, Kei; Ebisawa, Ken; Ishida, Manabu

    2012-01-01

    We present the result of a Suzaku X-ray spectroscopic observation of the dwarf nova Z Camelopardalis, which was conducted by chance at the onset of an optical outburst. We used the X-ray Imaging Spectrometer (a 38 ks exposure) and the Hard X-ray Detector (34 ks) to obtain a 0.35-40 keV spectrum simultaneously. Spectral characteristics suggest that the source was in the X-ray quiescent state despite being in the rising phase of an outburst in the optical band. The spectrum shows a clear signature of circumstellar absorption in excess of interstellar absorption and the reprocessed emission features of Fe fluorescence and Compton scattering. The extra absorption is explained due to partial coverage by either neutral or ionized matter. We found a spectral change during the observation, which is attributable only to the change in the circumstellar absorption. Such an X-ray spectral variation is reported for the first time in dwarf novae. We speculate that the variation in the circumstellar absorption is interprete...

  20. X-ray and Near-infrared Studies of a Star-forming Cloud; L1448

    E-Print Network [OSTI]

    Tsujimoto, M; Tsuboi, Y

    2005-01-01

    We present the results of X-ray and near-infrared (NIR) observations of L1448, a star-forming region in the Perseus cloud complex using the Chandra X-ray Observatory and the 4 m telescope at the Kitt Peak National Observatory. We detect 72 X-ray sources in a ~17 arcmin x 17 arcmin region with a ~68 ks ACIS exposure, for which we conduct follow-up NIR imaging observations in a concentric ~11 arcmin x 11 arcmin region with FLAMINGOS down to m_Ks ~ 17 mag. Twelve X-ray sources have NIR or optical counterparts. By plotting X-ray mean energy versus NIR to X-ray flux ratio, the X-ray sources are clearly separated into two groups. The X-ray spectral and temporal features as well as NIR magnitudes and colors indicate that one group mainly consists of young stellar objects (YSOs) in the cloud and the other of background extragalactic sources. Ten X-ray-emitting YSO candidates are thus newly identified, which are low-mass or brown dwarf mass sources from their NIR magnitudes. In addition, a possible X-ray signal is fou...

  1. Wetting and Mechanical Performance of Zirconia Brazed with Silver/Copper Oxide and Silver/Vanadium Oxide Alloys

    SciTech Connect (OSTI)

    Sinnamon, Kathleen E.; Meier, Alan; Joshi, Vineet V.

    2014-12-01

    The wetting behavior and mechanical strength of silver/copper oxide and silver/vanadium oxide braze alloys were investigated for both magnesia-stabilized and yttria-stabilized (Mg-PSZ and Y-TZP) transformation toughened zirconia substrates. The temperatures investigated were 1000 to 1100°C, with oxide additions of 1 to 10 weight percent V2O5 or CuO, and hold times of 0.9 to 3.6 ks. Increasing either the isothermal hold temperature or time had a distinctly negative effect on the joint strength. The maximum strengths for both braze alloys were obtained for 5 wt. % oxide additions at 1050°C with a hold time of 0.9 ks. The Mg-PSZ/Ag-CuO system exhibited a average fracture strength of 255 MPa (45% of the reported monolithic strength), and the Y-TZP/Ag-CuO system had an average fracture strength of 540 MPa (30% of the reported monolithic strength). The fracture strengths were lower for the Ag-V2O5 braze alloys, with fracture strengths of approximately 180 MPa (30% of the monolithic strength) for Mg-PSZ versus approximately 160 MPa (10% of the monolithic strength) for Y-TZP. No interfacial products were observed in low magnification SEM analysis for the brazing alloys containing V2O5 additions, while there were interfacial products present for brazes prepared with CuO additions in the braze alloy.

  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. X-ray and Near-infrared Studies of a Star-forming Cloud; L1448

    E-Print Network [OSTI]

    M. Tsujimoto; N. Kobayashi; Y. Tsuboi

    2005-06-27

    We present the results of X-ray and near-infrared (NIR) observations of L1448, a star-forming region in the Perseus cloud complex using the Chandra X-ray Observatory and the 4 m telescope at the Kitt Peak National Observatory. We detect 72 X-ray sources in a ~17 arcmin x 17 arcmin region with a ~68 ks ACIS exposure, for which we conduct follow-up NIR imaging observations in a concentric ~11 arcmin x 11 arcmin region with FLAMINGOS down to m_Ks ~ 17 mag. Twelve X-ray sources have NIR or optical counterparts. By plotting X-ray mean energy versus NIR to X-ray flux ratio, the X-ray sources are clearly separated into two groups. The X-ray spectral and temporal features as well as NIR magnitudes and colors indicate that one group mainly consists of young stellar objects (YSOs) in the cloud and the other of background extragalactic sources. Ten X-ray-emitting YSO candidates are thus newly identified, which are low-mass or brown dwarf mass sources from their NIR magnitudes. In addition, a possible X-ray signal is found from a mid-infrared protostar L1448 IRS 3(A). The lack of detection of this source in our deep NIR images indicates that this source has a very steep spectral slope of > 3.2 in 2--10 micron.

  4. Identification and environmental distribution of dcpA encoding the 1,2-dichloropropane-to-propene reductive dehalogenase in organohalide-respiring Chloroflexi

    SciTech Connect (OSTI)

    Padilla-Crespo, Elizabeth; Yan, Jun; Swift, Cynthia M; Chourey, Karuna; Hettich, Robert {Bob} L; Ritalahti, Kirsti M; Loeffler, Frank E

    2014-01-01

    Dehalococcoides mccartyi (Dhc) strains KS and RC grow with 1,2-dichloropropane (1,2-D) as an electron acceptor in enrichment cultures derived from hydrocarbon-contaminated and pristine river sediments, respectively. Transcription, expression, enzymatic and PCR analyses implicated the reductive dehalogenase gene dcpA in 1,2-D dichloroelimination to propene and inorganic chloride. Quantitative real-time PCR (qPCR) analyses demonstrated Dhc cell increase during growth with 1,2-D and suggested that both Dhc strains carried a single dcpA gene copy per genome. Dhc strain RC and strain KS produced 1.8 0.1 x 107 and 1.4 0.5 x 107 cells per mole of propene formed, respectively. The dcpA gene was identified in 1,2-D-to-propene-dechlorinating microcosms established with sediment samples collected from different geographical locations in Europe and North and South America. Clone library analysis revealed two distinct dcpA phylogenetic clusters, both of which the dcpA gene-targeted qPCR assay captured, suggesting the qPCR assay is useful for site assessment and bioremediation monitoring at 1,2-D-contaminated sites.

  5. MOLECULAR GAS, CO, AND STAR FORMATION IN GALAXIES: EMERGENT EMPIRICAL RELATIONS, FEEDBACK, AND THE EVOLUTION OF VERY GAS-RICH SYSTEMS

    SciTech Connect (OSTI)

    Pelupessy, Federico I. [Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden (Netherlands); Papadopoulos, Padelis P. [Argelander Institut fuer Astronomie, Auf dem Huegel 71, D-53121 Bonn (Germany)

    2009-12-20

    We use time-varying models of the coupled evolution of the H I, H{sub 2} gas phases and stars in galaxy-sized numerical simulations to (1) test for the emergence of the Kennicutt-Schmidt (K-S) and the H{sub 2}-pressure relation, (2) explore a realistic H{sub 2}-regulated star formation recipe which brings forth a neglected and potentially significant SF-regulating factor, and (3) go beyond typical galactic environments (for which these galactic empirical relations are deduced) to explore the early evolution of very gas-rich galaxies. In this work, we model low-mass galaxies (M{sub baryon} <= 10{sup 9} M{sub sun}), while incorporating an independent treatment of CO formation and destruction, the most important tracer molecule of H{sub 2} in galaxies, along with that for the H{sub 2} gas itself. We find that both the K-S and the H{sub 2}-pressure empirical relations can robustly emerge in galaxies after a dynamic equilibrium sets in between the various interstellar medium (ISM) states, the stellar component and its feedback (T approx> 1 Gyr). The only significant dependence of these relations seems to be for the CO-derived (and thus directly observable) ones, which show a strong dependence on the ISM metallicity. The H{sub 2}-regulated star formation recipe successfully reproduces the morphological and quantitative aspects of previous numerical models while doing away with the star formation efficiency parameter. Most of the H I -> H{sub 2} mass exchange is found taking place under highly non-equilibrium conditions necessitating a time-dependent treatment even in typical ISM environments. Our dynamic models indicate that the CO molecule can be a poor, nonlinear, H{sub 2} gas tracer. Finally, for early evolutionary stages (T approx< 0.4 Gyr), we find significant and systematic deviations of the true star formation from that expected from the K-S relation, which are especially pronounced and prolonged for metal-poor systems. The largest such deviations occur for the very gas-rich galaxies, where deviations of a factor approx3-4 in global star formation rate (SFR) can take place with respect to those expected from the CO-derived K-S relation. This is particularly important since gas-rich systems at high redshifts could appear as having unusually high SFRs with respect to their CO-bright H{sub 2} gas reservoirs. This points to a possibly serious deficiency of K-S relations as elements of the sub-grid physics of star formation in simulations of structure formation in the early universe.

  6. Chemical aging of single and multicomponent biomass burning aerosol surrogate-particles by OH: Implications for cloud condensation nucleus activity

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

    Thalman, R.; Thalman, R.; Wang, J.; Knopf, D. A.

    2015-01-01

    Multiphase OH and O? oxidation reactions with atmospheric organic aerosol (OA) can influence particle physicochemical properties including composition, morphology, and lifetime. Chemical aging of initially insoluble or low soluble single-component OA by OH and O? can increase their water-solubility and hygroscopicity, making them more active as cloud condensation nuclei (CCN) and susceptible to wet deposition. However, an outstanding problem is whether the effects of chemical aging on their CCN activity are preserved when mixed with other organic or inorganic compounds exhibiting greater water-solubility. In this work, the CCN activity of laboratory-generated biomass burning aerosol (BBA) surrogate-particles exposed to OH andmore »O? is evaluated by determining the hygroscopicity parameter, ?, as a function of particle type, mixing state, and OH/O? exposure applying a CCN counter (CCNc) coupled to an aerosol flow reactor (AFR). Levoglucosan (LEV), 4-methyl-5-nitrocatechol (MNC), and potassium sulfate (KS) serve as representative BBA compounds that exhibit different hygroscopicity, water solubility, chemical functionalities, and reactivity with OH radicals, and thus exemplify the complexity of mixed inorganic/organic aerosol in the atmosphere. The CCN activities of all of the particles were unaffected by O? exposure. Following exposure to OH, ? of MNC was enhanced by an order of magnitude, from 0.009 to ~0.1, indicating that chemically-aged MNC particles are better CCN and more prone to wet deposition than pure MNC particles. No significant enhancement in ? was observed for pure LEV particles following OH exposure. ? of the internally-mixed particles was not affected by OH oxidation. Furthermore, the CCN activity of OH exposed MNC-coated KS particles is similar to the OH unexposed atomized 1:1 by mass MNC: KS binary-component particles. Our results strongly suggest that when OA is dominated by water-soluble organic carbon (WSOC) or inorganic ions, chemical aging has no significant impact on OA hygroscopicity. The organic compounds exhibiting low solubility behave as if they are infinitely soluble when mixed with a sufficient amount of water-soluble compounds. At and beyond this point, the particles' CCN activity is governed entirely by the water-soluble fraction and not influenced by the oxidized organic fraction. Our results have important implications for heterogeneous oxidation and its impact on cloud formation given that atmospheric aerosol is a complex mixture of organic and inorganic compounds exhibiting a wide-range of solubilities.« less

  7. Chemical aging of single and multicomponent biomass burning aerosol surrogate particles by OH: implications for cloud condensation nucleus activity

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

    Slade, J. H.; Thalman, R.; Wang, J.; Knopf, D. A.

    2015-09-14

    Multiphase OH and O3 oxidation reactions with atmospheric organic aerosol (OA) can influence particle physicochemical properties including composition, morphology, and lifetime. Chemical aging of initially insoluble or low-soluble single-component OA by OH and O3 can increase their water solubility and hygroscopicity, making them more active as cloud condensation nuclei (CCN) and susceptible to wet deposition. However, an outstanding problem is whether the effects of chemical aging on their CCN activity are preserved when mixed with other organic or inorganic compounds exhibiting greater water solubility. In this work, the CCN activity of laboratory-generated biomass burning aerosol (BBA) surrogate particles exposed tomore »OH and O3 is evaluated by determining the hygroscopicity parameter, ?, as a function of particle type, mixing state, and OH and O3 exposure applying a CCN counter (CCNc) coupled to an aerosol flow reactor (AFR). Levoglucosan (LEV), 4-methyl-5-nitrocatechol (MNC), and potassium sulfate (KS) serve as representative BBA compounds that exhibit different hygroscopicity, water solubility, chemical functionalities, and reactivity with OH radicals, and thus exemplify the complexity of mixed inorganic/organic aerosol in the atmosphere. The CCN activities of all of the particles were unaffected by O3 exposure. Following exposure to OH, ? of MNC was enhanced by an order of magnitude, from 0.009 to ~ 0.1, indicating that chemically aged MNC particles are better CCN and more prone to wet deposition than pure MNC particles. No significant enhancement in ? was observed for pure LEV particles following OH exposure. ? of the internally mixed particles was not affected by OH oxidation. Furthermore, the CCN activity of OH-exposed MNC-coated KS particles is similar to the OH unexposed atomized 1 : 1 by mass MNC : KS binary-component particles. Our results strongly suggest that when OA is dominated by water-soluble organic carbon (WSOC) or inorganic ions, chemical aging has no significant impact on OA hygroscopicity. The organic compounds exhibiting low solubility behave as if they are infinitely soluble when mixed with a sufficient number of water-soluble compounds. At and beyond this point, the particles' CCN activity is governed entirely by the water-soluble fraction and is not influenced by the oxidized organic fraction. Our results have important implications for heterogeneous oxidation and its impact on cloud formation given that atmospheric aerosol is a complex mixture of organic and inorganic compounds exhibiting a wide range of solubilities.« less

  8. Chemical aging of single and multicomponent biomass burning aerosol surrogate-particles by OH: implications for cloud condensation nucleus activity

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

    Slade, J. H.; Thalman, R.; Wang, J.; Knopf, D. A.

    2015-03-06

    Multiphase OH and O3 oxidation reactions with atmospheric organic aerosol (OA) can influence particle physicochemical properties including composition, morphology, and lifetime. Chemical aging of initially insoluble or low soluble single-component OA by OH and O3 can increase their water-solubility and hygroscopicity, making them more active as cloud condensation nuclei (CCN) and susceptible to wet deposition. However, an outstanding problem is whether the effects of chemical aging on their CCN activity are preserved when mixed with other organic or inorganic compounds exhibiting greater water-solubility. In this work, the CCN activity of laboratory-generated biomass burning aerosol (BBA) surrogate-particles exposed to OH andmore »O3 is evaluated by determining the hygroscopicity parameter, ?, as a function of particle type, mixing state, and OH/O3 exposure applying a CCN counter (CCNc) coupled to an aerosol flow reactor (AFR). Levoglucosan (LEV), 4-methyl-5-nitrocatechol (MNC), and potassium sulfate (KS) serve as representative BBA compounds that exhibit different hygroscopicity, water solubility, chemical functionalities, and reactivity with OH radicals, and thus exemplify the complexity of mixed inorganic/organic aerosol in the atmosphere. The CCN activities of all of the particles were unaffected by O3 exposure. Following exposure to OH, ? of MNC was enhanced by an order of magnitude, from 0.009 to ~0.1, indicating that chemically-aged MNC particles are better CCN and more prone to wet deposition than pure MNC particles. No significant enhancement in ? was observed for pure LEV particles following OH exposure. ? of the internally-mixed particles was not affected by OH oxidation. Furthermore, the CCN activity of OH exposed MNC-coated KS particles is similar to the OH unexposed atomized 1 : 1 by mass MNC : KS binary-component particles. Our results strongly suggest that when OA is dominated by water-soluble organic carbon (WSOC) or inorganic ions, chemical aging has no significant impact on OA hygroscopicity. The organic compounds exhibiting low solubility behave as if they are infinitely soluble when mixed with a sufficient amount of water-soluble compounds. At and beyond this point, the particles' CCN activity is governed entirely by the water-soluble fraction and not influenced by the oxidized organic fraction. Our results have important implications for heterogeneous oxidation and its impact on cloud formation given that atmospheric aerosol is a complex mixture of organic and inorganic compounds exhibiting a wide-range of solubilities.« less

  9. The double-padlock problem: is secure classical information transmission possible without key exchange?

    E-Print Network [OSTI]

    Chappell, James M

    2012-01-01

    The idealized Kish-Sethuraman (KS) cipher is known to offer perfect information theoretical security with classical physical means. However, realization of the protocol is hitherto an open problem, as the required mathematical operators have not been identified in the previous literature. A mechanical analogy of this protocol can be seen as sending a message in a box using two padlocks; one locked by the Sender and the other locked by the Receiver, so that theoretically the message remains secure at all times. We seek a mathematical representation of this process, considering that it would be very unusual if there was a physical process with no mathematical description and indeed we find a solution within a three and four dimensional Clifford algebra. The significance of finding a mathematical description that describes the protocol, is that it is a possible step toward a classical physical realization having benefits in increased security with reduced complexity.

  10. The double-padlock problem: is secure classical information transmission possible without key exchange?

    E-Print Network [OSTI]

    James M. Chappell; Derek Abbott

    2012-12-31

    The idealized Kish-Sethuraman (KS) cipher is theoretically known to offer perfect security through a classical information channel. However, realization of the protocol is hitherto an open problem, as the required mathematical operators have not been identified in the previous literature. A mechanical analogy of this protocol can be seen as sending a message in a box using two padlocks; one locked by the Sender and the other locked by the Receiver, so that theoretically the message remains secure at all times. We seek a mathematical representation of this process, considering that it would be very unusual if there was a physical process with no mathematical description and indeed we find a solution within a four dimensional Clifford algebra. The significance of finding a mathematical description that describes the protocol, is that it is a possible step toward a physical realization having benefits in increased security with reduced complexity.

  11. 2-D studies of Relativistic electron beam plasma instabilities in an inhomogeneous plasma

    E-Print Network [OSTI]

    Shukla, Chandrashekhar; Patel, Kartik

    2015-01-01

    Relativistic electron beam propagation in plasma is fraught with several micro instabilities like two stream, filamentation etc., in plasma. This results in severe limitation of the electron transport through a plasma medium. Recently, however, there has been an experimental demonstration of improved transport of Mega Ampere of electron currents (generated by the interaction of intense laser with solid target) in a carbon nanotube structured solid target [Phys. Rev Letts. 108, 235005 (2012)]. This then suggests that the inhomogeneous plasma (created by the ionization of carbon nano tube structured target) helps in containing the growth of the beam plasma instabilities. This manuscript addresses this issue with the help of a detailed analytical study and simulations with the help of 2-D Particle - In - Cell code. The study conclusively demonstrates that the growth rate of the dominant instability in the 2-D geometry decreases when the plasma density is chosen to be inhomogeneous, provided the scale length 1/ks...

  12. 86 GHz SiO maser survey of late-type stars in the Inner Galaxy II. Infrared photometry of the SiO Target Stars

    E-Print Network [OSTI]

    M. Messineo; H. J. Habing; K. M. Menten; A. Omont; L. O. Sjouwerman

    2004-01-14

    We present a compilation and study of DENIS, 2MASS, ISOGAL, MSX and IRAS 1--25 micron photometry for a sample of 441 late-type stars in the inner Galaxy, which we previously searched for 86 GHz SiO maser emission (Messineo et al.2002). The comparison of the DENIS and 2MASS J and Ks magnitudes shows that most of the SiO targets are indeed variable stars. The MSX colours and the IRAS [12]-[25] colour of our SiO targets are consistent with those of Mira type stars with dust silicate feature at 9.7 micron feature in emission, indicating only a moderate mass-loss rate.

  13. A comparative salary study of professional engineers employed by Texas State and municipal governments and private industry 

    E-Print Network [OSTI]

    Mauer, William A

    1957-01-01

    glgRARY a & M COLLEGE OF lExas k 005fkmkTXVI SPLIT STOFf Of NRfNSSIQ?kl 1SaQXRQNI SKPXOISQ 1T HXLS SSkSL kSS l@SISXPAL ' SOVIS?SI?TS k15 fIXVkTS Xlg@SgRI Villkea k& 5eeer . k Cheese kgrkemleerel eeS Neeiaeekeel College ef %agee kS yerelel... 1$5$+ o ~ e s ~ 3$ XI ~ PAID HOLIDAYS RSCSIVED YEARLY SY ZSQIW~RS IS PRIVATE I?2UGQLK SY YEARS I? PKXZN IKPXOYllEHT y iQ55 o ~ ~ e ~ 22 IXI ~ PAID VACATIGKS RECEIVED YEARLY SY Z?GIHEEHB I? PRXVATS ISDURTHY SY Yl''M XS PR"DSST i7RPLOYlihSTq kQ)5...

  14. Evolution of massive fields around a black hole in Horava gravity

    E-Print Network [OSTI]

    Nijo Varghese; V C Kuriakose

    2011-05-23

    We study the evolution of massive scalar field in the spacetime geometry of Kehagias-Sfetsos(KS) black hole in deformed Horava-Lifshitz(HL) gravity by numerical analysis. We find that the signature of HL theory is encoded in the quasinormal mode(QNM) phase of the evolution of field. The QNM phase in the evolution process lasts for a longer time in HL theory. QNMs involved in the evolution of massive field are calculated and find that they have a higher oscillation frequency and a lower damping rate than the Schwarzschild spacetime case. We also study the relaxation of field in the intermediate and asymptotic range and verified that behaviors of field in these phases are independent of the HL parameter and is identical to the Schwarzschild case.

  15. Procedures in statistical design and analysis of variance 

    E-Print Network [OSTI]

    McGarrah, James Eugene

    1957-01-01

    tececcsee the mcasstcd~ ke Cbe ~tccs et tceatesset e18scNe, If tbece je csep dcsssht ee te the cceL(tscss4+ ef Chse sseehwaec a ccektahwe teecsaAcsaeeQcsss M the ?ssrhAhse scLII hc xeqsChw4i The fe&garJg ~cecW4one haec heee fee@ ccyyltealde Ss the eae4... stecclyeLat ef ths ecetislcLcclae) ks me of eeyhAo cecclceclsatioc4, The cc~xiosgisas ef ths teeehewct(s) ace ssetts?eL eeoc a Icccge esca. ke8 hghkarc tbie io tbo seat CCCLL?faotsef CCCCh?CL gf Cheee ie CeC ysrtieAg ceases foe Nme Cote of grcscggcg...

  16. Probing new physics with flavor physics (and probing flavor physics with new physics)

    E-Print Network [OSTI]

    Yosef Nir

    2007-08-14

    This is a written version of a series of lectures aimed at graduate students and postdoctoral fellows in particle theory/string theory/particle experiment familiar with the basics of the Standard Model. We begin with an overview of flavor physics and its implications for new physics. We emphasize the "new physics flavor puzzle". Then, we give four specific examples of flavor measurements and the lessons that have been (or can be) drawn from them: (i) Charm physics: lessons for supersymmetry from the upper bound on $\\Delta m_D$. (ii) Bottom physics: model independent lessons on the KM mechanism and on new physics in neutral B mixing from $S_{\\psi K_S}$. (iii) Top physics and beyond: testing minimal flavor violation at the LHC. (iv) Neutrino physics: interpreting the data on neutrino masses and mixing within flavor models.

  17. Energy Dependence of $?$ and $\\bar?$ Production at CERN-SPS Energies

    E-Print Network [OSTI]

    A. Mischke

    2002-09-04

    Rapidity distributions for $\\Lambda$ and $\\bar{\\Lambda}$ hyperons in central Pb-Pb collisions at 40, 80 and 158 A$\\cdot$GeV and for ${\\rm K}_{s}^{0}$ mesons at 158 A$\\cdot$GeV are presented. The lambda multiplicities are studied as a function of collision energy together with AGS and RHIC measurements and compared to model predictions. A different energy dependence of the $\\Lambda/\\pi$ and $\\bar{\\Lambda}/\\pi$ is observed. The $\\bar{\\Lambda}/\\Lambda$ ratio shows a steep increase with collision energy. Evidence for a $\\bar{\\Lambda}/\\bar{\\rm p}$ ratio greater than 1 is found at 40 A$\\cdot$GeV.

  18. Caenorhabditis elegans Flamingo Cadherin fmi-1 Regulates GABAergic Neuronal Development

    E-Print Network [OSTI]

    Najarro, Elvis Huarcaya; Wong, Lianna; Zhen, Mei; Carpio, Edgar Pinedo; Goncharov, Alexandr; Garriga, Gian; Lundquist, Erik A.; Jin, Yishi; Ackley, Brian D.

    2012-03-21

    , 5004 Haworth Hall, Department of Molecular Biosci- ences, 1200 Sunnyside Avenue, The University of Kansas, Lawrence, KS 66045. E-mail: bdackley@ku.edu. DOI:10.1523/JNEUROSCI.3094-11.2012 Copyright © 2012 the authors 0270-6474/12/324196-16$15.00/0 4196...Is94 [Pacr-2::SNB-1::GFP], juIs76 [Punc-25::GFP], juIs14 [Pacr-2::GFP], juIs145 [Pflp-13::GFP], lhIs9 and lhIs10 [Pfmi-1:: FMI-1::venusGFP], lhIs27-lhIs30 [Pfmi-1::FMI-1#1;int::GFP#2;Punc-25:: SNB-1RFP], lhIs35 [Punc-55::GFP], and hdIs46 [Pcdh-4::GFP...

  19. TREKisM Issue 55 

    E-Print Network [OSTI]

    1987-01-01

    It reminds him of the Excelsior from ST III. I dIdn't realize Just how much I disl ike TNG. And I know it's a largely emotIonal response! I simply cannot watch thIs show and not compare It with Star Trek -- and this new show Is not Trek, for me. I...'m not planning to watch It any more. Sorry I griped so long. But I did feel it would be better to give specIfIc reasons for my dislIke of the show, and not just say "It sucks." LAVENA KAY KIDD: 414 S. Main, McPherson KS 67460 I have two complaints about THE NEXT...

  20. Design and implementation of a 16-bit Reconfigurable Arithmetic Processor 

    E-Print Network [OSTI]

    Janakiraman, Balaji

    1993-01-01

    that the main. processor appropria(. ely shifts th& tsvo sc9?cnn s bcforc passing the op& ran&la Io I. his pro& cssor. This 1&roccsso& co?ld bc?s? 1 as a s& paraI& ??pro& cssor o& as a rcl&lacemcnt for a? AriI h??:I i? J. ogi&' JJ?il (A 1 J I) f?nctional bio...&'. s th&. modilicd Boo&1&') algorithm and thc ad&lcr block use) th& Ka11acc's &nethod. The &1&lail? I dc)criptio? of the design ol' thcsc bio&'ks is discussed in Chapt& r I&&. Thc ac uuu&lalor stage. . as said above, contains th&' cuu&mon, 'll-1&i& c...

  1. Reconstruction of a Radiation Point Source's Radial Location Using Goodness-of-Fit Test on Spectra Obtained from an HPGe Detector

    E-Print Network [OSTI]

    L. T. Evans; K. Andre; R. De; R. Henning; E. D. Morgan

    2009-08-16

    High purity germanium (HPGe) detectors are ubiquitous in nuclear physics experiments and are also used in numerous low radioactive background detectors. The effect of the position of $^{60}$Co and $^{137}$Cs point sources on the shape of spectra were studied with Monte Carlo and HPGe detector measurements. We briefly confirm previous work on the position dependence of relative heights of peaks. Spectra taken with the radiation sources placed at locations around the detector were then compared using the Kolmogorov-Smirnov (K-S) goodness-of-fit test. We demonstrate that with this method the Compton continuum spectral shape has good sensitivity to the radial location of a point-source, but poor angular resolution. We conclude with a study of the position reconstruction accuracy as a function of the number of counts from the source.

  2. Retorting of oil shale followed by solvent extraction of spent shale: Experiment and kinetic analysis

    SciTech Connect (OSTI)

    Khraisha, Y.H.

    2000-05-01

    Samples of El-Lajjun oil shale were thermally decomposed in a laboratory retort system under a slow heating rate (0.07 K/s) up to a maximum temperature of 698--773 K. After decomposition, 0.02 kg of spent shale was extracted by chloroform in a Soxhlet extraction unit for 2 h to investigate the ultimate amount of shale oil that could be produced. The retorting results indicate an increase in the oil yields from 3.24% to 9.77% of oil shale feed with retorting temperature, while the extraction results show a decrease in oil yields from 8.10% to 3.32% of spent shale. The analysis of the data according to the global first-order model for isothermal and nonisothermal conditions shows kinetic parameters close to those reported in literature.

  3. Dvoretzky--Kiefer--Wolfowitz Inequalities for the Two-sample Case

    E-Print Network [OSTI]

    Wei, Fan

    2011-01-01

    The Dvoretzky--Kiefer--Wolfowitz (DKW) inequality says that if $F_n$ is an empirical distribution function for variables i.i.d.\\ with a distribution function $F$, and $K_n$ is the Kolmogorov statistic $\\sqrt{n}\\sup_x|(F_n-F)(x)|$, then there is a finite constant $C$ such that for any $M>0$, $\\Pr(K_n>M) \\leq C\\exp(-2M^2).$ Massart proved that one can take C=2 (DKWM inequality) which is sharp for $F$ continuous. We consider the analogous Kolmogorov--Smirnov statistic $KS_{m,n}$ for the two-sample case and show that for $m=n$, the DKW inequality holds with C=2 if and only if $n\\geq 458$. For $n_0\\leq n2$ depending on $n_0$. For $m\

  4. Cataclysmic Variables from SDSS III. The Third Year

    E-Print Network [OSTI]

    Paula Szkody; Arne Henden; Oliver Fraser; Nicole Silvestri; John Bochanski; Michael A. Wolfe; Marcel Agüeros; Brian Warner; Patrick Woudt; Jonica Tramposch; Lee Homer; Gary Schmidt; Gillian R. Knapp; Scott F. Anderson; Kevin Covey; Hugh Harris; Suzanne Hawley; Donald P. Schneider; Wolfgang Voges; J. Brinkmann

    2004-07-08

    This paper continues the series that identifies new cataclysmic variables found in the Sloan Digital Sky Survey. We present 36 cataclysmic variables and one possible symbiotic star from Sloan spectra obtained during 2002, of which 34 are new discoveries, 2 are known dwarf novae (BC UMa, KS UMa) and one is a known CV identified from the 2dF survey. The positions, colors and spectra of all 37 systems are presented, along with follow-up spectroscopic/photometric observations of 10 systems. As in the past 2 years of data, the new SDSS systems show a large variety of characteristics based on their inclination and magnetic fields, including 3 eclipsing systems, 4 with prominent He II emission, and 15 systems showing features of the underlying stars.

  5. An intern experience at Texas A&M University and Texas A&M Research Foundation: an internship report 

    E-Print Network [OSTI]

    Le Blanc, Joseph Urlan, 1937-

    2013-03-13

    fe r in the College o f Geosciences. A t abou t the same time I app lied and was g ra n te d adm ission to bo th the G raduate College and Docto r o f E n g in ee r in g P rog ram in the E ng in ee r in g Co l? lege. I sub sequen... th a n ks to my two able a ss is ta n ts , M rs . J. Pate and M rs . S. H e r r ig , f o r wo rd p ro ce ss in g se rv ices and o th e r a dm in is t ra t iv e fu n c t io n s . Many th a n k s o f app re c ia t io n are also in o...

  6. Computer solution of SU(3) crossing matrices for the Kronecker Product 8 x 10 

    E-Print Network [OSTI]

    Wells, Alan Harvey

    1975-01-01

    are 1, 2, 5 involved ( +, j, , 7f- ), the algorithm evaluates contribu- tions from all combinations of Ig. c INES?us~ AS~llM ) TO 2(FC i", :-9 DO Topo I2 =IEl, l8 8 C-G'VHEC "E~ 2F~z 7 h'0 05 jriiN C-GTiL&LE P075iTEKS IC ID Do goo I1=XC... the inverses of these crossing matrices, and were able and u are their own inverse. to show that both While cannot 19 be its own inverse. From the identity , ?X?X, , X =~ (A26) we f ind kS se 4$ X=X X=X X , ?X?X, X =, X ?X. , Y = t we f ind . , X...

  7. Quantum Tunneling of Massive Spin-1 Particles From Non-stationary Metrics

    E-Print Network [OSTI]

    I. Sakalli; A. Övgün

    2015-07-07

    Hawking radiation (HR) is invariant under the coordinate transformation, and it must be independent of the particle type emitting from the considered black hole (BH). From this fact, we focus on the HR of massive vector (spin-1) particles tunneling from Schwarzschild BH expressed in the Kruskal-Szekeres (KS) and dynamic Lemaitre (DL) coordinates. Using the Proca equation (PE) together with Hamilton-Jacobi (HJ) and WKB methods, we show that the tunneling rate, and its consequence Hawking temperature are well recovered by the quantum tunneling of the massive vector particles. This is the first example for the HR of the massive vector particles tunneling from a four dimensional BH expressed in non-stationary regular coordinates.

  8. Quantum Tunneling of Massive Spin-1 Particles From Non-stationary Metrics

    E-Print Network [OSTI]

    Sakalli, I

    2015-01-01

    Hawking radiation (HR) is invariant under the coordinate transformation, and it must be independent of the particle type emitting from the considered black hole (BH). From this fact, we focus on the HR of massive vector (spin-1) particles tunneling from Schwarzschild BH expressed in the Kruskal-Szekeres (KS) and dynamic Lemaitre (DL) coordinates. Using the Proca equation (PE) together with Hamilton-Jacobi (HJ) and WKB methods, we show that the tunneling rate, and its consequence Hawking temperature are well recovered by the quantum tunneling of the massive vector particles. This is the first example for the HR of the massive vector particles tunneling from a four dimensional BH expressed in non-stationary regular coordinates.

  9. A Chandra view of non-thermal emission in the northwestern region of supernova remnant RCW 86: Particle acceleration and magnetic fields

    SciTech Connect (OSTI)

    Castro, Daniel; Lopez, Laura A.; Figueroa-Feliciano, Enectali [MIT-Kavli Center for Astrophysics and Space Research, 77 Massachusetts Avenue, Cambridge, MA 02139 (United States); Slane, Patrick O.; Yamaguchi, Hiroya [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Ramirez-Ruiz, Enrico [Department of Astronomy and Astrophysics, University of California Santa Cruz, 1156 High Street, Santa Cruz, CA 95060 (United States)

    2013-12-10

    The shocks of supernova remnants are believed to accelerate particles to cosmic ray (CR) energies. The amplification of the magnetic field due to CRs propagating in the shock region is expected to have an impact on both the emission from the accelerated particle population as well as the acceleration process itself. Using a 95 ks observation with the Advanced CCD Imaging Spectrometer on board the Chandra X-Ray Observatory, we map and characterize the synchrotron emitting material in the northwest region of RCW 86. We model spectra from several different regions, both filamentary and diffuse, where emission appears to be dominated by synchrotron radiation. The fine spatial resolution of Chandra allows us to obtain accurate emission profiles across three different non-thermal rims in this region. The narrow width (l ? 10''-30'') of these filaments constrains the minimum magnetic field strength at the post-shock region to approximately 80 ?G.

  10. Towards an Optimal Gradient-dependent Energy Functional of the PZ-SIC Form

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

    Jónsson, Elvar Örn; Lehtola, Susi; Jónsson, Hannes

    2015-06-01

    Results of Perdew–Zunger self-interaction corrected (PZ-SIC) density functional theory calculations of the atomization energy of 35 molecules are compared to those of high-level quantum chemistry calculations. While the PBE functional, which is commonly used in calculations of condensed matter, is known to predict on average too high atomization energy (overbinding of the molecules), the application of PZ-SIC gives a large overcorrection and leads to significant underestimation of the atomization energy. The exchange enhancement factor that is optimal for the generalized gradient approximation within the Kohn-Sham (KS) approach may not be optimal for the self-interaction corrected functional. The PBEsol functional, wheremore »the exchange enhancement factor was optimized for solids, gives poor results for molecules in KS but turns out to work better than PBE in PZ-SIC calculations. The exchange enhancement is weaker in PBEsol and the functional is closer to the local density approximation. Furthermore, the drop in the exchange enhancement factor for increasing reduced gradient in the PW91 functional gives more accurate results than the plateaued enhancement in the PBE functional. A step towards an optimal exchange enhancement factor for a gradient dependent functional of the PZ-SIC form is taken by constructing an exchange enhancement factor that mimics PBEsol for small values of the reduced gradient, and PW91 for large values. The average atomization energy is then in closer agreement with the high-level quantum chemistry calculations, but the variance is still large, the F2 molecule being a notable outlier.« less

  11. A comparative theoretical study on core-hole excitation spectra of azafullerene and its derivatives

    SciTech Connect (OSTI)

    Deng, Yunfeng [Guizhou Provincial Key Laboratory of Computational Nano-material Science, Guizhou Normal College, Guiyang 550018 (China) [Guizhou Provincial Key Laboratory of Computational Nano-material Science, Guizhou Normal College, Guiyang 550018 (China); Department of Physics, Guizhou University, Guiyang 550025 (China); Gao, Bin, E-mail: bin.gao@uit.no [Guizhou Provincial Key Laboratory of Computational Nano-material Science, Guizhou Normal College, Guiyang 550018 (China) [Guizhou Provincial Key Laboratory of Computational Nano-material Science, Guizhou Normal College, Guiyang 550018 (China); Centre for Theoretical and Computational Chemistry (CTCC), Department of Chemistry, University of Tromsø—The Arctic University of Norway, N-9037 Tromsø (Norway); Deng, Mingsen, E-mail: deng@gznc.edu.cn [Guizhou Provincial Key Laboratory of Computational Nano-material Science, Guizhou Normal College, Guiyang 550018 (China)] [Guizhou Provincial Key Laboratory of Computational Nano-material Science, Guizhou Normal College, Guiyang 550018 (China); Luo, Yi [Guizhou Provincial Key Laboratory of Computational Nano-material Science, Guizhou Normal College, Guiyang 550018 (China) [Guizhou Provincial Key Laboratory of Computational Nano-material Science, Guizhou Normal College, Guiyang 550018 (China); Department of Theoretical Chemistry, School of Biotechnology, Royal Institute of Technology, SE-10691 Stockholm (Sweden)

    2014-03-28

    The core-hole excitation spectra—near-edge x-ray absorption spectroscopy (NEXAFS), x-ray emission spectroscopy (XES), and x-ray photoelectron spectroscopy (XPS) shake-up satellites have been simulated at the level of density functional theory for the azafullerene C{sub 59}N and its derivatives (C{sub 59}N){sup +}, C{sub 59}HN, (C{sub 59}N){sub 2}, and C{sub 59}N–C{sub 60}, in which the XPS shake-up satellites were simulated using our developed equivalent core hole Kohn-Sham (ECH-KS) density functional theory approach [B. Gao, Z. Wu, and Y. Luo, J. Chem. Phys. 128, 234704 (2008)] which aims for the study of XPS shake-up satellites of large-scale molecules. Our calculated spectra are generally in good agreement with available experimental results that validates the use of the ECH-KS method in the present work. The nitrogen K-edge NEXAFS, XES, and XPS shake-up satellites spectra in general can be used as fingerprints to distinguish the azafullerene C{sub 59}N and its different derivatives. Meanwhile, different carbon K-edge spectra could also provide detailed information of (local) electronic structures of different molecules. In particular, a peak (at around 284.5 eV) in the carbon K-edge NEXAFS spectrum of the heterodimer C{sub 59}N–C{sub 60} is confirmed to be related to the electron transfer from the C{sub 59}N part to the C{sub 60} part in this charge-transfer complex.

  12. On Effective Spacetime Dimension in the Ho?ava-Lifshitz Gravity

    E-Print Network [OSTI]

    G. Alencar; V. B. Bezerra; M. S. Cunha; C. R. Muniz

    2015-05-22

    In this manuscript we explicitly compute the effective dimension of spacetime in some backgrounds of Ho\\v{r}ava-Lifshitz (H-L) gravity. For all the cases considered, the results are compatible with a dimensional reduction of the spacetime to $d+1=2$, at high energies (ultraviolet limit), which is confirmed by other quantum gravity approaches, as well as to $d+1=4$, at low energies (infrared limit). This is obtained by computing the free energy of massless scalar and gauge fields. We find that the only effect of the background is to change the proportionality constant between the internal energy and temperature. Firstly, we consider both the non-perturbative and perturbative models involving the matter action, without gravitational sources but with manifest time and space symmetry breaking, in order to calculate modifications in the Stephan-Boltzmann law. When gravity is taken into account, we assume a scenario in which there is a spherical source with mass $M$ and radius $R$ in thermal equilibrium with radiation, and consider the static and spherically symmetric solution of the H-L theory found by Kehagias-Sfetsos (K-S), in the weak and strong field approximations. As byproducts, for the weak field regime, we used the current uncertainty of the solar radiance measurements to establish a constraint on the $\\omega$ free parameter of the K-S solution. We also calculate the corrections, due to gravity, to the recently predicted attractive force that black bodies exert on nearby neutral atoms and molecules.

  13. A Chandra-HETG view of MCG +8-11-11

    SciTech Connect (OSTI)

    Murphy, K. D.; Nowak, M. A.

    2014-12-10

    We present a spectral analysis of the 118 ks Chandra High Energy Transmission Gratings (HETG) observation of the X-ray bright Seyfert 1.5 galaxy MCG +8-11-11, in conjunction with 100 ks of archival Suzaku data, aimed at investigating the signatures of warm absorption and Compton reflection reported from previous Suzaku and XMM-Newton studies of the source. Contrary to previous results, we find that warm absorption is not required by the data. Instead, we report upper limits on absorption lines that are below previous (marginal) detections. Fe K? line emission is clearly detected and is likely resolved with ? ? 0.02 keV with the HETG data. We applied self-consistent, broadband spectral-fitting models to the Chandra and Suzaku data to investigate this and other signatures of distant absorption and reflection. Utilizing in particular the MYTorus model, we find that the data are consistent with reprocessing by a distant, neutral torus that is marginally Compton-thick ( N {sub H} ?10{sup 24}cm{sup –2}) and out of the line of sight. However, we do not find compelling evidence of a relativistically broadened Fe K emission line, which is often expected from type 1 active galactic nuclei. This is consistent with some, although not all, previous studies of MCG +8-11-11. A well-measured edge is identified by the HETG near 0.5 keV, indicating neutral absorption in the line of sight that is consistent with galactic absorption; however, the absorption may be partially intrinsic to the source. The HETG data are consistent with the presence of a soft excess, a feature that may be missed by considering the Suzaku data alone.

  14. ESO Imaging Survey. Deep Public Survey: Infrared Data for the Chandra Deep Field South

    E-Print Network [OSTI]

    B. Vandame; L. F. Olsen; H. E. Jorgensen; M. A. T. Groenewegen; M. Schirmer; S. Arnouts; C. Benoist; L. da Costa; R. P. Mignani; C. Rite'; R. Slijkhuis; E. Hatziminaoglou; R. Hook; R. Madejsky; A. Wicenec

    2001-02-19

    This paper presents new J and Ks near-infrared data obtained from observations of the Chandra Deep Field South (CDF-S) conducted at the ESO 3.5m New Technology Telescope (NTT). These data were taken as part of the ongoing Deep Public Survey (DPS) being carried out by the ESO Imaging Survey (EIS) program, extending the EIS-DEEP survey. Combined these surveys now provide a contiguous coverage over an area of 400 square arcmin in the near-infrared, nearly matching that covered by the deep X-ray observations of Chandra, four times the area of the original EIS-DEEP survey. The paper briefly describes the observations and the new techniques being employed for pipeline processing jittered infrared observations, which include unbiased de-fringing and sky-background subtraction, pixel-based astrometry and stacking and pixel registration based on a multi-resolution decomposition of the images. The astrometric solution is based on a pre-release of the GSC-II catalog and has an accuracy of < 0.15 arcsec. The final images for 12 pointings presented here reach median 5 sigma limiting magnitudes of J_AB~23.4 and K_AB~22.6 as measured within an aperture 2xFWHM. The frame to frame variation of the photometric zero-point is estimated to be <0.09 mag. The data are publicly available in the form of fully calibrated J and Ks pixel maps and source lists extracted for each pointing. These data can be requested through the URL ``http://www.eso.org/eis''.

  15. Electronic and optical properties of pure and modified diamondoids studied by many-body perturbation theory and time-dependent density functional theory

    SciTech Connect (OSTI)

    Demján, Tamás; Vörös, Márton; Palummo, Maurizia; Gali, Adam

    2014-08-14

    Diamondoids are small diamond nanoparticles (NPs) that are built up from diamond cages. Unlike usual semiconductor NPs, their atomic structure is exactly known, thus they are ideal test-beds for benchmarking quantum chemical calculations. Their usage in spintronics and bioimaging applications requires a detailed knowledge of their electronic structure and optical properties. In this paper, we apply density functional theory (DFT) based methods to understand the electronic and optical properties of a few selected pure and modified diamondoids for which accurate experimental data exist. In particular, we use many-body perturbation theory methods, in the G{sub 0}W{sub 0} and G{sub 0}W{sub 0}+BSE approximations, and time-dependent DFT in the adiabatic local density approximation. We find large quasiparticle gap corrections that can exceed thrice the DFT gap. The electron-hole binding energy can be as large as 4 eV but it is considerably smaller than the GW corrections and thus G{sub 0}W{sub 0}+BSE optical gaps are about 50% larger than the Kohn-Sham (KS) DFT gaps. We find significant differences between KS time-dependent DFT and GW+BSE optical spectra on the selected diamondoids. The calculated G{sub 0}W{sub 0} quasiparticle levels agree well with the corresponding experimental vertical ionization energies. We show that nuclei dynamics in the ionization process can be significant and its contribution may reach about 0.5 eV in the adiabatic ionization energies.

  16. Density functional theory based generalized effective fragment potential method

    SciTech Connect (OSTI)

    Nguyen, Kiet A. E-mail: ruth.pachter@wpafb.af.mil; Pachter, Ruth E-mail: ruth.pachter@wpafb.af.mil; Day, Paul N.

    2014-06-28

    We present a generalized Kohn-Sham (KS) density functional theory (DFT) based effective fragment potential (EFP2-DFT) method for the treatment of solvent effects. Similar to the original Hartree-Fock (HF) based potential with fitted parameters for water (EFP1) and the generalized HF based potential (EFP2-HF), EFP2-DFT includes electrostatic, exchange-repulsion, polarization, and dispersion potentials, which are generated for a chosen DFT functional for a given isolated molecule. The method does not have fitted parameters, except for implicit parameters within a chosen functional and the dispersion correction to the potential. The electrostatic potential is modeled with a multipolar expansion at each atomic center and bond midpoint using Stone's distributed multipolar analysis. The exchange-repulsion potential between two fragments is composed of the overlap and kinetic energy integrals and the nondiagonal KS matrices in the localized molecular orbital basis. The polarization potential is derived from the static molecular polarizability. The dispersion potential includes the intermolecular D3 dispersion correction of Grimme et al. [J. Chem. Phys. 132, 154104 (2010)]. The potential generated from the CAMB3LYP functional has mean unsigned errors (MUEs) with respect to results from coupled cluster singles, doubles, and perturbative triples with a complete basis set limit (CCSD(T)/CBS) extrapolation, of 1.7, 2.2, 2.0, and 0.5 kcal/mol, for the S22, water-benzene clusters, water clusters, and n-alkane dimers benchmark sets, respectively. The corresponding EFP2-HF errors for the respective benchmarks are 2.41, 3.1, 1.8, and 2.5 kcal/mol. Thus, the new EFP2-DFT-D3 method with the CAMB3LYP functional provides comparable or improved results at lower computational cost and, therefore, extends the range of applicability of EFP2 to larger system sizes.

  17. A SUZAKU DISCOVERY OF A SLOWLY VARYING HARD X-RAY CONTINUUM FROM THE TYPE I SEYFERT GALAXY NGC 3516

    SciTech Connect (OSTI)

    Noda, Hirofumi [Department of Astronomy, School of Science, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan); Makishima, Kazuo; Nakazawa, Kazuhiro [Department of Physics, School of Science, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan); Yamada, Shin'ya [Cosmic Radiation Laboratory, Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198 (Japan)

    2013-07-10

    The bright type I Seyfert galaxy NGC 3516 was observed by Suzaku twice, in 2005 October 12-15 and 2009 October 28-November 2, for a gross time coverage of 242 and 544 ks and a net exposure of 134 and 255 ks, respectively. The 2-10 keV luminosity was 2.8 Multiplication-Sign 10{sup 41} erg s{sup -1} in 2005 and 1.6 Multiplication-Sign 10{sup 41} erg s{sup -1} in 2009. The 1.4-1.7 keV and 1.7-10 keV count rates both exhibited peak-to-peak variations of a factor of {approx}2 in 2005 and {approx}4 in 2009. In both observations, the 15-45 keV count rate was less variable. The 2-10 keV spectrum in 2005 was significantly more convex than that in 2009. Through a count-count plot technique, the 2-45 keV signals in both sets of data were successfully decomposed in a model-independent way into two distinct broadband components. One is a variable emission with a featureless spectral shape, and the other is a non-varying hard component accompanied by a prominent Fe-K emission line at 6.33 keV (6.40 keV in the rest frame). The former was successfully fitted by an absorbed power-law model, while the latter requires a new hard continuum in addition to a reflection component from distant materials. The spectral and variability differences between the two observations are mainly attributed to long-term changes of this new hard continuum, which was stable on timescales of several hundreds of kiloseconds.

  18. The Search for High Energy Extended Emission by Fermi-LAT from Swift-Localized Gamma-Ray Bursts

    SciTech Connect (OSTI)

    Chiang, J.; /Stanford U., HEPL /SLAC; Racusin, J.L.; /NASA, Goddard

    2012-05-01

    The brighter Fermi-LAT bursts have exhibited emission at energies >0.1 GeV that persists as late as {approx}2 ks after the prompt phase has nominally ended. This so-called 'extended emission' could arise from continued activity of the prompt burst mechanism or it could be the start of a high energy afterglow component. The high energy extended emission seen by the LAT has typically followed a t{sup -}{gamma} power-law temporal decay where {gamma} {approx} 1.2-1.7 and has shown no strong indication of spectral evolution. In contrast, the prompt burst emission generally displays strong spectral variability and more complex temporal changes in the LAT band. This differing behavior suggests that the extended emission likely corresponds to an early afterglow phase produced by an external shock. In this study, we look for evidence of high energy extended emission from 145 Swift-localized GRBs that have occurred since the launch of Fermi. A majority of these bursts were either outside of the LAT field-of-view or were otherwise not detected by the LAT during the prompt phase. However, because of the scanning operation of the Fermi satellite, the long-lived extended emission of these bursts may be detectable in the LAT data on the {approx}few ks time scale. We will look for emission from individual bursts and will perform a stacking analysis in order to set bounds on this emission for the sample as a whole. The detection of such emission would have implications for afterglow models and for the overall energy budget of GRBs.

  19. Passivating ligand and solvent contributions to the electronic properties of semiconductor nanocrystals

    SciTech Connect (OSTI)

    Fischer, S.; Crotty, A.; Kilina, S.; Ivanov, I.; Tretiak, S

    2012-01-01

    We examine in detail the impact of passivating ligands (i.e., amines, phosphines, phosphine oxides and pyridines) on the electronic and optical spectra of Cd{sub 33}Se{sub 33} quantum dots (QDs) using density functional theory (DFT) and time-dependent DFT (TDDFT) quantum-chemical methodologies. Most ligand orbitals are found deep inside in the valence and conduction bands of the QD, with pyridine being an exception by introducing new states close to the conduction band edge. Importantly, all ligands contribute states which are highly delocalized over both the QD surface and ligands, forming hybridized orbitals rather than ligand-localized trap states. In contrast, the states close to the band gap are delocalized over the QD atoms only and define the lower energy absorption spectra. The random detachment of one of ligands from the QD surface results in the appearance of a highly localized unoccupied state inside the energy gap of the QD. Such changes in the electronic structure are correlated with the respective QD-ligand binding energy and steric ligand-ligand interactions. Polar solvent significantly reduces both effects leading to delocalization and stabilization of the surface states. Thus, trap and surface states are substantially eliminated by the solvent. Polar solvent also blue-shifts (e.g., 0.3-0.4 eV in acetonitrile) the calculated absorption spectra. This shift increases with an increase of the dielectric constant of the solvent. We also found that the approximate single-particle Kohn-Sham (KS) approach is adequate for calculating the absorption spectra of the ligated QDs. Besides a systematic blue-shift, the KS spectra are in very good agreement with their respective counterparts calculated with the more accurate TDDFT method.

  20. The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds: VI. Perseus Observed with MIPS

    E-Print Network [OSTI]

    L. M. Rebull; K. R. Stapelfeldt; N. J. Evans II; J. K. Joergensen; P. M. Harvey; T. Y. Brooke; T. L. Bourke; D. L. Padgett; N. L. Chapman; S. -P. Lai; W. J. Spiesmann; A. Noreiga-Crespo; B. Merin; T. Huard; L. E. Allen; G. A. Blake; T. Jarrett; D. W. Koerner; L. G. Mundy; P. C. Myers; A. I. Sargent; E. F. van Dishoeck; Z. Wahhaj; K. E. Young

    2007-01-24

    We present observations of 10.6 square degrees of the Perseus molecular cloud at 24, 70, and 160 microns with the Spitzer Space Telescope Multiband Imaging Photometer for Spitzer (MIPS). The image mosaics show prominent, complex extended emission dominated by illuminating B stars on the East side of the cloud, and by cold filaments of 160 micron emission on the West side. Of 3950 point sources identified at 24 microns, 1141 have 2MASS counterparts. A quarter of these populate regions of the Ks vs. Ks-[24] diagram that are distinct from stellar photospheres and background galaxies, and thus are likely to be cloud members with infrared excess. Nearly half (46%) of these 24 micron excess sources are distributed outside the IC 348 and NGC 1333 clusters. NGC 1333 shows the highest fraction of stars with flat or rising spectral energy distributions (28%), while Class II SEDs are most common in IC 348. These results are consistent with previous relative age determinations for the two clusters. The intercluster region contains several tightly clumped (r~0.1 pc) young stellar aggregates whose members exhibit a wide variety of infrared spectral energy distributions characteristic of different circumstellar environments. One possible explanation is a significant age spread among the aggregate members, such that some have had time to evolve more than others. Alternatively, if the aggregate members all formed at roughly the same time, then remarkably rapid circumstellar evolution would be required to account for the association of Class I and Class III sources at ages <~1 Myr. We highlight important results for several other objects as well (full abstract in the paper).

  1. The Phoenix Deep Survey: The star-formation rates and the stellar masses of EROs

    E-Print Network [OSTI]

    A. Georgakakis; A. M. Hopkins; J. Afonso; M. Sullivan; B. Mobasher; L. E. Cram

    2005-12-06

    We estimate the star-formation rates and the stellar masses of the Extremely Red objects (EROs) detected in a 180arcmin2 Ks-band survey (Ks~20mag). This sample is complemented by sensitive 1.4GHz radio observations (12micro-Jy; 1sigma rms) and multiwaveband photometric data (UBVRIJ) as part of the Phoenix Deep Survey. For bright K4mag; total of 177) we use photometric methods to discriminate dust-enshrouded active systems from early-type galaxies and to constrain their redshifts. Radio stacking is then employed to estimate mean radio flux densities of 8.6 (3sigma) and 6.4micro-Jy (2.4sigma) for the dusty and early-type subsamples respectively. Assuming that dust enshrouded active EROs are powered by star-formation the above radio flux density at the median redshift of z=1 translates to a radio luminosity of 4.5e22W/Hz and a star-formation rate of SFR=25Mo/yr. Combining this result with photometric redshift estimates we find a lower limit to the star-formation rate density of ~0.02Mo/yr/Mpc^3 for the K5e10Mo. We also find that EROs represent a sizable fraction (~50%) of the number density of galaxies more massive than M=5e10Mo at z~1, with almost equal contributions from dusty and early types. Similarly, we find that EROs contribute about half of the mass density of the Universe at z~1 after taking into account incompleteness because of the limit K=19.5mag.

  2. Structural characteristics and elevated temperature mechanical properties of AJ62 Mg alloy

    SciTech Connect (OSTI)

    Kubásek, J., E-mail: Jiri.Kubasek@vscht.cz; Vojt?ch, D.; Martínek, M.

    2013-12-15

    Structure and mechanical properties of the novel casting AJ62 (Mg–6Al–2Sr) alloy developed for elevated temperature applications were studied. The AJ62 alloy was compared to commercial casting AZ91 (Mg–9Al–1Zn) and WE43 (Mg–4Y–3RE) alloys. The structure was examined by scanning electron microscopy, x-ray diffraction and energy dispersive spectrometry. Mechanical properties were characterized by Viskers hardness measurements in the as-cast state and after a long-term heat treatment at 250 °C/150 hours. Compressive mechanical tests were also carried out both at room and elevated temperatures. Compressive creep tests were conducted at a temperature of 250 °C and compressive stresses of 60, 100 and 140 MPa. The structure of the AJ62 alloy consisted of primary ?-Mg dendrites and interdendritic nework of the Al{sub 4}Sr and massive Al{sub 3}Mg{sub 13}Sr phases. By increasing the cooling rate during solidification from 10 and 120 K/s the average dendrite arm thickness decreased from 18 to 5 ?m and the total volume fraction of the interdendritic phases from 20% to 30%. Both factors slightly increased hardness and compressive strength. The room temperature compressive strength and hardness of the alloy solidified at 30 K/s were 298 MPa and 50 HV 5, i.e. similar to those of the as-cast WE43 alloy and lower than those of the AZ91 alloy. At 250 °C the compressive strength of the AJ62 alloy decreased by 50 MPa, whereas those of the AZ91 and WE43 alloys by 100 and 20 MPa, respectively. The creep rate of the AJ62 alloy was higher than that of the WE43 alloy, but significantly lower in comparison with the AZ91 alloy. Different thermal stabilities of the alloys were discussed and related to structural changes during elevated temperature expositions. - Highlights: • Small effect of cooling rate on the compressive strength and hardness of AJ 62 • A bit lower compressive strength of AJ 62 compared to AZ91 at room temperature • Higher resistance of the AJ 62 alloy to the creep process in compression compared to AZ91 • Excellent thermal stability and creep resistance of the alloy WE 43 • Improved thermal stability and creep resistance in order WE43 > AJ62 >> AZ91.

  3. ARM - Midlatitude Continental Convective Clouds Microwave Radiometer Profiler (jensen-mwr)

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

    Jensen, Mike

    A major component of the Mid-latitude Continental Convective Clouds Experiment (MC3E) field campaign was the deployment of an enhanced radiosonde array designed to capture the vertical profile of atmospheric state variables (pressure, temperature, humidity wind speed and wind direction) for the purpose of deriving the large-scale forcing for use in modeling studies. The radiosonde array included six sites (enhanced Central Facility [CF-1] plus five new sites) launching radiosondes at 3-6 hour sampling intervals. The network will cover an area of approximately (300)2 km2 with five outer sounding launch sites and one central launch location. The five outer sounding launch sites are: S01 Pratt, KS [ 37.7oN, 98.75oW]; S02 Chanute, KS [37.674, 95.488]; S03 Vici, Oklahoma [36.071, -99.204]; S04 Morris, Oklahoma [35.687, -95.856]; and S05 Purcell, Oklahoma [34.985, -97.522]. Soundings from the SGP Central Facility during MC3E can be retrieved from the regular ARM archive. During routine MC3E operations 4 radiosondes were launched from each of these sites (approx. 0130, 0730, 1330 and 1930 UTC). On days that were forecast to be convective up to four additional launches were launched at each site (approx. 0430, 1030, 1630, 2230 UTC). There were a total of approximately 14 of these high frequency launch days over the course of the experiment. These files contain brightness temperatures observed at Purcell during MC3E. The measurements were made with a 5 channel (22.235, 23.035, 23.835, 26.235, 30.000GHz) microwave radiometer at one minute intervals. The results have been separated into daily files and the day of observations is indicated in the file name. All observations were zenith pointing. Included in the files are the time variables base_time and time_offset. These follow the ARM time conventions. Base_time is the number seconds since January 1, 1970 at 00:00:00 for the first data point of the file and time_offset is the offset in seconds from base_time.

  4. ARM - Midlatitude Continental Convective Clouds - Ultra High Sensitivity Aerosol Spectrometer(tomlinson-uhsas)

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

    Tomlinson, Jason; Jensen, Mike

    Ultra High Sensitivity Aerosol Spectrometer (UHSASA) A major component of the Mid-latitude Continental Convective Clouds Experiment (MC3E) field campaign was the deployment of an enhanced radiosonde array designed to capture the vertical profile of atmospheric state variables (pressure, temperature, humidity wind speed and wind direction) for the purpose of deriving the large-scale forcing for use in modeling studies. The radiosonde array included six sites (enhanced Central Facility [CF-1] plus five new sites) launching radiosondes at 3-6 hour sampling intervals. The network will cover an area of approximately (300)2 km2 with five outer sounding launch sites and one central launch location. The five outer sounding launch sites are: S01 Pratt, KS [ 37.7oN, 98.75oW]; S02 Chanute, KS [37.674, 95.488]; S03 Vici, Oklahoma [36.071, -99.204]; S04 Morris, Oklahoma [35.687, -95.856]; and S05 Purcell, Oklahoma [34.985, -97.522]. Soundings from the SGP Central Facility during MC3E can be retrieved from the regular ARM archive. During routine MC3E operations 4 radiosondes were launched from each of these sites (approx. 0130, 0730, 1330 and 1930 UTC). On days that were forecast to be convective up to four additional launches were launched at each site (approx. 0430, 1030, 1630, 2230 UTC). There were a total of approximately 14 of these high frequency launch days over the course of the experiment. These files contain brightness temperatures observed at Purcell during MC3E. The measurements were made with a 5 channel (22.235, 23.035, 23.835, 26.235, 30.000GHz) microwave radiometer at one minute intervals. The results have been separated into daily files and the day of observations is indicated in the file name. All observations were zenith pointing. Included in the files are the time variables base_time and time_offset. These follow the ARM time conventions. Base_time is the number seconds since January 1, 1970 at 00:00:00 for the first data point of the file and time_offset is the offset in seconds from base_time.

  5. ARM - Midlatitude Continental Convective Clouds Microwave Radiometer Profiler (jensen-mwr)

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

    Jensen, Mike

    2012-02-01

    A major component of the Mid-latitude Continental Convective Clouds Experiment (MC3E) field campaign was the deployment of an enhanced radiosonde array designed to capture the vertical profile of atmospheric state variables (pressure, temperature, humidity wind speed and wind direction) for the purpose of deriving the large-scale forcing for use in modeling studies. The radiosonde array included six sites (enhanced Central Facility [CF-1] plus five new sites) launching radiosondes at 3-6 hour sampling intervals. The network will cover an area of approximately (300)2 km2 with five outer sounding launch sites and one central launch location. The five outer sounding launch sites are: S01 Pratt, KS [ 37.7oN, 98.75oW]; S02 Chanute, KS [37.674, 95.488]; S03 Vici, Oklahoma [36.071, -99.204]; S04 Morris, Oklahoma [35.687, -95.856]; and S05 Purcell, Oklahoma [34.985, -97.522]. Soundings from the SGP Central Facility during MC3E can be retrieved from the regular ARM archive. During routine MC3E operations 4 radiosondes were launched from each of these sites (approx. 0130, 0730, 1330 and 1930 UTC). On days that were forecast to be convective up to four additional launches were launched at each site (approx. 0430, 1030, 1630, 2230 UTC). There were a total of approximately 14 of these high frequency launch days over the course of the experiment. These files contain brightness temperatures observed at Purcell during MC3E. The measurements were made with a 5 channel (22.235, 23.035, 23.835, 26.235, 30.000GHz) microwave radiometer at one minute intervals. The results have been separated into daily files and the day of observations is indicated in the file name. All observations were zenith pointing. Included in the files are the time variables base_time and time_offset. These follow the ARM time conventions. Base_time is the number seconds since January 1, 1970 at 00:00:00 for the first data point of the file and time_offset is the offset in seconds from base_time.

  6. ARM - Midlatitude Continental Convective Clouds - Ultra High Sensitivity Aerosol Spectrometer(tomlinson-uhsas)

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

    Tomlinson, Jason; Jensen, Mike

    2012-02-28

    Ultra High Sensitivity Aerosol Spectrometer (UHSASA) A major component of the Mid-latitude Continental Convective Clouds Experiment (MC3E) field campaign was the deployment of an enhanced radiosonde array designed to capture the vertical profile of atmospheric state variables (pressure, temperature, humidity wind speed and wind direction) for the purpose of deriving the large-scale forcing for use in modeling studies. The radiosonde array included six sites (enhanced Central Facility [CF-1] plus five new sites) launching radiosondes at 3-6 hour sampling intervals. The network will cover an area of approximately (300)2 km2 with five outer sounding launch sites and one central launch location. The five outer sounding launch sites are: S01 Pratt, KS [ 37.7oN, 98.75oW]; S02 Chanute, KS [37.674, 95.488]; S03 Vici, Oklahoma [36.071, -99.204]; S04 Morris, Oklahoma [35.687, -95.856]; and S05 Purcell, Oklahoma [34.985, -97.522]. Soundings from the SGP Central Facility during MC3E can be retrieved from the regular ARM archive. During routine MC3E operations 4 radiosondes were launched from each of these sites (approx. 0130, 0730, 1330 and 1930 UTC). On days that were forecast to be convective up to four additional launches were launched at each site (approx. 0430, 1030, 1630, 2230 UTC). There were a total of approximately 14 of these high frequency launch days over the course of the experiment. These files contain brightness temperatures observed at Purcell during MC3E. The measurements were made with a 5 channel (22.235, 23.035, 23.835, 26.235, 30.000GHz) microwave radiometer at one minute intervals. The results have been separated into daily files and the day of observations is indicated in the file name. All observations were zenith pointing. Included in the files are the time variables base_time and time_offset. These follow the ARM time conventions. Base_time is the number seconds since January 1, 1970 at 00:00:00 for the first data point of the file and time_offset is the offset in seconds from base_time.

  7. Near-infrared Study of the Carina Nebula

    E-Print Network [OSTI]

    Kaushar Sanchawala; Wen-Ping Chen; Devendra Ojha; Swarna Kanti Ghosh; Yasushi Nakajima; Motohide Tamura; Daisuke Baba; Shuji Sato; Masahiro Tsujimoto

    2007-06-13

    We have carried out near-infrared (NIR) imaging observations of the Carina Nebula for an area of ~400 sq. arcmin. including the star clusters Trumpler 14 (Tr 14) and Trumpler 16 (Tr 16). With 10 sigma limiting magnitudes of J ~ 18.5, H ~ 17.5 and K_s ~ 16.5, we identified 544 Class II and 11 Class I young star candidates. We find some 40 previously unknown very red sources with H-K_s > 2, most of which remain undetected at the J band. The red NIR sources are found to be concentrated to the south-east of Tr 16, along the `V' shaped dust lane, where the next generation of stars seems to be forming. In addition, we find indications of ongoing star formation near the three MSX point sources, G287.51-0.49, G287.47-0.54, and G287.63-0.72. A handful of red NIR sources are seen to populate around each of these MSX sources. Apart from this, we identified two hard Chandra X-ray sources near G287.47-0.54, one of which does not have an NIR counterpart and may be associated with a Class I/Class 0 object. The majority of the Class II candidates, on the other hand, are seen to be distributed in the directions of the clusters, demarcating different evolutionary stages in this massive star-forming region. A comparison of the color-magnitude diagrams of the clusters with pre-main sequence model tracks shows that the stellar population of these clusters is very young (< 3 Myr). The K_s band luminosity function (KLF) of Tr 14 shows structure at the faint end, including a sharp peak due to the onset of deuterium burning, implying an age of 1-2 Myr for the cluster. The KLF of Tr 16, in contrast, is found to rise smoothly until it turns over. The slopes of the mass functions derived for the clusters are found to be in agreement with the canonical value of the field star initial mass function derived by Salpeter.

  8. X-RAY OBSERVATIONS OF THE SUPERNOVA REMNANT CTB 87 (G74.9+1.2): AN EVOLVED PULSAR WIND NEBULA

    SciTech Connect (OSTI)

    Matheson, H.; Safi-Harb, S.; Kothes, R. E-mail: samar@physics.umanitoba.ca

    2013-09-01

    Pulsar wind nebulae (PWNe) studies with the Chandra X-Ray Observatory have opened a new window to address the physics of pulsar winds, zoom on their interaction with their hosting supernova remnant (SNR) and interstellar medium, and identify their powering engines. We here present a new 70 ks, plus an archived 18 ks, Chandra ACIS observation of the SNR CTB 87 (G74.9+1.2), classified as a PWN with unusual radio properties and poorly studied in X-rays. We find that the peak of the X-ray emission is clearly offset from the peak of the radio emission by {approx}100'' and located at the southeastern edge of the radio nebula. We detect a point source-the putative pulsar-at the peak of the X-ray emission and study its spectrum separately from the PWN. This new point source, CXOU J201609.2+371110, is surrounded by a compact nebula displaying a torus-like structure and possibly a jet. A more extended diffuse nebula is offset from the radio nebula, extending from the point source to the northwest for {approx}250''. The spectra of the point source, compact nebula, and extended diffuse nebula are all well described by a power-law model with a photon index of 1.1 (0.7-1.6), 1.2 (0.9-1.4), and 1.7 (1.5-1.8), respectively, for a column density N{sub H} = 1.38 (1.21-1.57) Multiplication-Sign 10{sup 22} cm{sup -2} (90% confidence). The total X-ray luminosity of the source is {approx}1.6 Multiplication-Sign 10{sup 34} erg s{sup -1} at an assumed distance of 6.1 kpc, with {approx}2% and 6% contribution from the point source and compact nebula, respectively. The observed properties suggest that CTB 87 is an evolved ({approx}5-28 kyr) PWN, with the extended radio emission likely a ''relic'' PWN, as in Vela-X and G327.1-1.1. To date, however, there is no evidence for thermal X-ray emission from this SNR, and the SNR shell is still missing, suggesting expansion into a low-density medium (n{sub 0} < 0.2 D{sup -1/2}{sub 6.1} cm{sup -3}), likely caused by a stellar wind bubble blown by the progenitor star.

  9. Ambiguity-Free Measurement of cos2beta: Time-Integrated and Time-Dependent Angular Analyses of B->J/Psi K pi

    E-Print Network [OSTI]

    The BABAR Collaboration; B. Aubert

    2004-11-02

    We present results on $B\\to J/\\psi\\xspace K\\pi$ decays using $e^+e^-$ annihilation data collected with the BABAR detector at the $\\Upsilon(4S)$ resonance. The detector is located at the PEP-II asymmetric-energy storage ring facility at the Stanford Linear Accelerator Center. Using approximately 88 million $B\\bar{B}$ pairs, we measure the decay amplitudes for the flavor eigenmodes and observe strong-phase differences indicative of final-state interactions with a significance of 7.6 standard deviations. We use the interference between the $K\\pi$ $S$-wave and $P$-wave amplitudes in the region of the $K^*(892)$ to resolve the ambiguity in the determination of these strong phases. We then perform an ambiguity-free measurement of $\\cos2\\beta$ using the angular and time-dependent asymmetry in $B\\to J/\\psi\\xspace K^{*0}(K_S^0\\pi^0$) dec With $\\sin 2 \\beta$ fixed at its measured value and $\\cos 2 \\beta$ treated as an in we find $\\cos 2\\beta=2.72_{-0.79}^{+0.50}\\mathrm{(stat)} \\pm 0.27\\mathrm{(syst)}$, de sign of $\\cos 2\\beta$ to be positive at 86% CL.

  10. CANDELS/GOODS-S, CDFS, and ECDFS: photometric redshifts for normal and X-ray-detected galaxies

    SciTech Connect (OSTI)

    Hsu, Li-Ting; Salvato, Mara; Nandra, Kirpal; Brusa, Marcella; Bender, Ralf; Buchner, Johannes; Brightman, Murray; Georgakakis, Antonis; Donley, Jennifer L.; Kocevski, Dale D.; Guo, Yicheng; Barro, Guillermo; Faber, Sandra M.; Rangel, Cyprian; Willner, S. P.; Ashby, Matthew L. N.; Budavári, Tamás; Szalay, Alexander S.; Dahlen, Tomas; and others

    2014-11-20

    We present photometric redshifts and associated probability distributions for all detected sources in the Extended Chandra Deep Field South (ECDFS). This work makes use of the most up-to-date data from the Cosmic Assembly Near-IR Deep Legacy Survey (CANDELS) and the Taiwan ECDFS Near-Infrared Survey (TENIS) in addition to other data. We also revisit multi-wavelength counterparts for published X-ray sources from the 4 Ms CDFS and 250 ks ECDFS surveys, finding reliable counterparts for 1207 out of 1259 sources (?96%). Data used for photometric redshifts include intermediate-band photometry deblended using the TFIT method, which is used for the first time in this work. Photometric redshifts for X-ray source counterparts are based on a new library of active galactic nuclei/galaxy hybrid templates appropriate for the faint X-ray population in the CDFS. Photometric redshift accuracy for normal galaxies is 0.010 and for X-ray sources is 0.014 and outlier fractions are 4% and 5.2%, respectively. The results within the CANDELS coverage area are even better, as demonstrated both by spectroscopic comparison and by galaxy-pair statistics. Intermediate-band photometry, even if shallow, is valuable when combined with deep broadband photometry. For best accuracy, templates must include emission lines.

  11. Cooling of the crust in the neutron star low-mass X-ray binary MXB 1659-29

    E-Print Network [OSTI]

    Edward M. Cackett; Rudy Wijnands; Jon M. Miller; Edward F. Brown; Nathalie Degenaar

    2008-09-24

    In quasi-persistent neutron star transients, long outbursts cause the neutron star crust to be heated out of thermal equilibrium with the rest of the star. During quiescence, the crust then cools back down. Such crustal cooling has been observed in two quasi-persistent sources: KS 1731-260 and MXB 1659-29. Here we present an additional Chandra observation of MXB 1659-29 in quiescence, which extends the baseline of monitoring to 6.6 yr after the end of the outburst. This new observation strongly suggests that the crust has thermally relaxed, with the temperature remaining consistent over 1000 days. Fitting the temperature cooling curve with an exponential plus constant model we determine an e-folding timescale of 465 +/- 25 days, with the crust cooling to a constant surface temperature of kT = 54 +/- 2 eV (assuming D=10 kpc). From this, we infer a core temperature in the range 3.5E7-8.3E7 K (assuming D=10 kpc), with the uncertainty due to the surface composition. Importantly, we tested two neutron star atmosphere models as well as a blackbody model, and found that the thermal relaxation time of the crust is independent of the chosen model and the assumed distance.

  12. Quinary metallic glass alloys

    DOE Patents [OSTI]

    Lin, X.; Johnson, W.L.

    1998-04-07

    At least quinary alloys form metallic glass upon cooling below the glass transition temperature at a rate less than 10{sup 3}K/s. Such alloys comprise zirconium and/or hafnium in the range of 45 to 65 atomic percent, titanium and/or niobium in the range of 4 to 7.5 atomic percent, and aluminum and/or zinc in the range of 5 to 15 atomic percent. The balance of the alloy compositions comprise copper, iron, and cobalt and/or nickel. The composition is constrained such that the atomic percentage of iron is less than 10 percent. Further, the ratio of copper to nickel and/or cobalt is in the range of from 1:2 to 2:1. The alloy composition formula is: (Zr,Hf){sub a}(Al,Zn){sub b}(Ti,Nb){sub c}(Cu{sub x}Fe{sub y}(Ni,Co){sub z}){sub d} wherein the constraints upon the formula are: a ranges from 45 to 65 atomic percent, b ranges from 5 to 15 atomic percent, c ranges from 4 to 7.5 atomic percent, d comprises the balance, d{hor_ellipsis}y is less than 10 atomic percent, and x/z ranges from 0.5 to 2.

  13. UNRAVELING THE ORIGIN OF OVERIONIZED PLASMA IN THE GALACTIC SUPERNOVA REMNANT W49B

    SciTech Connect (OSTI)

    Lopez, Laura A.; Castro, Daniel [MIT-Kavli Institute for Astrophysics and Space Research, 77 Massachusetts Avenue, 37-664H, Cambridge, MA 02139 (United States); Pearson, Sarah [Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen (Denmark); Ramirez-Ruiz, Enrico [Department of Astronomy and Astrophysics, University of California Santa Cruz, 1156 High Street, Santa Cruz, CA 95060 (United States); Yamaguchi, Hiroya; Slane, Patrick O.; Smith, Randall K., E-mail: lopez@space.mit.edu [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)

    2013-11-10

    Recent observations have shown several supernova remnants (SNRs) have overionized plasmas, where ions are stripped of more electrons than they would be if in equilibrium with the electron temperature. Rapid electron cooling is necessary to produce this situation, yet the physical origin of that cooling remains uncertain. To assess the cooling scenario responsible for overionization, in this paper we identify and map the overionized plasma in the Galactic SNR W49B based on a 220 ks Chandra Advanced CCD Imaging Spectrometer observation. We performed a spatially resolved spectroscopic analysis, measuring the electron temperature by modeling the continuum and comparing it to the temperature given by the flux ratio of the He-like and H-like lines of sulfur and argon. Using these results, we find that W49B is overionized in the west, with a gradient of overionization increasing from east to west. As the ejecta expansion is impeded by molecular material in the east but not in the west, our overionization maps suggest the dominant cooling mechanism is adiabatic expansion of the hot plasma.

  14. The relationship between X-ray variability amplitude and black hole mass in active galactic nuclei

    E-Print Network [OSTI]

    O'Neill, P M; Papadakis, I E; Turner, T J; Neill, Paul M. O'; Nandra, Kirpal; Papadakis, Iossif E.

    2005-01-01

    We have investigated the relationship between the 2-10 keV X-ray variability amplitude and black hole mass for a sample of 46 radio-quiet active galactic nuclei observed by ASCA. Thirty-three of the objects in our sample exhibited variability over a time-scale of ~40 ks, and we found a significant anti-correlation between excess variance and mass. Unlike most previous studies, we have quantified the variability using nearly the same time-scale for all objects. Moreover, we provide a prescription for estimating the uncertainties in excess variance which accounts both for measurement uncertainties and for the stochastic nature of the variability. We also present an analytical method to predict the excess variance from a model power spectrum accounting for binning, sampling and windowing effects. Using this, we modelled the variance-mass relation assuming all objects have a universal twice-broken power spectrum, with the position of the breaks being dependent on mass. This accounts for the general form of the re...

  15. AGN feedback in action: a new powerful wind in 1SXPSJ050819.8+172149

    E-Print Network [OSTI]

    Ballo, L; Braito, V; Campana, S; Della Ceca, R; Moretti, A; Vignali, C

    2015-01-01

    Galaxy merging is widely accepted to be a key driving factor in galaxy formation and evolution, while the feedback from AGN is thought to regulate the BH-bulge coevolution and the star formation process. In this context, we focused on 1SXPSJ050819.8+172149, a local (z=0.0175) Seyfert 1.9 galaxy (L_bol~4x10^43 ergs/s). The source belongs to an IR-luminous interacting pair of galaxies, characterized by a luminosity for the whole system (due to the combination of star formation and accretion) of log(L_IR/L_sun)=11.2. We present the first detailed description of the 0.3-10keV spectrum of 1SXPSJ050819.8+172149, monitored by Swift with 9 pointings performed in less than 1 month. The X-ray emission of 1SXPSJ050819.8+172149 is analysed by combining all the Swift pointings, for a total of ~72ks XRT net exposure. The averaged Swift-BAT spectrum from the 70-month survey is also analysed. The slope of the continuum is ~1.8, with an intrinsic column density NH~2.4x10^22 cm-2, and a deabsorbed luminosity L(2-10keV)~4x10^42...

  16. Multi-wavelength analysis of the Galactic supernova remnant MSH 11-61A

    E-Print Network [OSTI]

    Auchettl, Katie; Castro, Daniel; Foster, Adam R; Smith, Randall K

    2015-01-01

    Due to its centrally bright X-ray morphology and limb brightened radio profile, MSH 11-61A (G290.1-0.8) is classified as a mixed morphology supernova remnant (SNR). H$\\textsc{i}$ and CO observations determined that the SNR is interacting with molecular clouds found toward the north and southwest regions of the remnant. In this paper we report on the detection of $\\gamma$-ray emission coincident with MSH 11-61A, using 70 months of data from the Large Area Telescope on board the \\textit{Fermi Gamma-ray Space Telescope}. To investigate the origin of this emission, we perform broadband modelling of its non-thermal emission considering both leptonic and hadronic cases and concluding that the $\\gamma$-ray emission is most likely hadronic in nature. Additionally we present our analysis of a 111 ks archival \\textit{Suzaku} observation of this remnant. Our investigation shows that the X-ray emission from MSH 11-61A arises from shock-heated ejecta with the bulk of the X-ray emission arising from a recombining plasma, w...

  17. A Deep Chandra Catalog of X-ray Point Sources toward the Galactic Center

    E-Print Network [OSTI]

    Muno, M P; Bautz, M W; Brandt, W N; Broos, P S; Feigelson, E D; Garmire, G P; Morris, M R; Ricker, G R; Townsley, L K

    2003-01-01

    (abridged) We present a catalog of 2357 point sources detected during 590 ks of Chandra observations of the 17-by-17 arcminute field around Sgr A*. This field encompasses a physical area of 40 by 40 pc at a distance of 8 kpc. The completeness limit of the sample at the Galactic center is 10^{31} erg s^{-1} (2.0--8.0 keV), while the detection limit is an order of magnitude lower. The 281 sources detected below 1.5 keV are mainly in the foreground of the Galactic center, while comparisons to the Chandra deep fields at high Galactic latitudes suggest that only about 100 of the observed sources are background AGN. The surface density of absorbed sources (not detected below 1.5 keV) falls off as 1/theta away from Sgr A*, in agreement with the distribution of stars in infrared surveys. Point sources brighter than our completeness limit produce 10% of the flux previously attributed to diffuse emission. The log(N)-log(S) distribution of the Galactic center sources is extremely steep (power-law slope alpha = 1.7). If ...

  18. Kinetics of silicide formation over a wide range of heating rates spanning six orders of magnitude

    SciTech Connect (OSTI)

    Molina-Ruiz, Manel; Lopeandía, Aitor F.; Gonzalez-Silveira, Marta; Garcia, Gemma; Clavaguera-Mora, Maria T. [Grup de Nanomaterials i Microsistemes, Departament de Física, Universitat Autònoma de Barcelona, 08193 Bellaterra (Spain); Peral, Inma [ALBA Synchrotron Light Facility, 08290 Cerdanyola del Vallès (Spain); Rodríguez-Viejo, Javier, E-mail: javier.rodriguez@uab.cat [Grup de Nanomaterials i Microsistemes, Departament de Física, Universitat Autònoma de Barcelona, 08193 Bellaterra (Spain); MATGAS Research Centre, UAB Campus, 08193 Bellaterra (Spain)

    2014-07-07

    Kinetic processes involving intermediate phase formation are often assumed to follow an Arrhenius temperature dependence. This behavior is usually inferred from limited data over narrow temperature intervals, where the exponential dependence is generally fully satisfied. However, direct evidence over wide temperature intervals is experimentally challenging and data are scarce. Here, we report a study of silicide formation between a 12?nm film of palladium and 15?nm of amorphous silicon in a wide range of heating rates, spanning six orders of magnitude, from 0.1 to 10{sup 5?}K/s, or equivalently more than 300?K of variation in reaction temperature. The calorimetric traces exhibit several distinct exothermic events related to interdiffusion, nucleation of Pd{sub 2}Si, crystallization of amorphous silicon, and vertical growth of Pd{sub 2}Si. Interestingly, the thickness of the initial nucleation layer depends on the heating rate revealing enhanced mass diffusion at the fastest heating rates during the initial stages of the reaction. In spite of this, the formation of the silicide strictly follows an Arrhenius temperature dependence over the whole temperature interval explored. A kinetic model is used to fit the calorimetric data over the complete heating rate range. Calorimetry is complemented by structural analysis through transmission electron microscopy and both standard and in-situ synchrotron X-ray diffraction.

  19. Comparison of diesel spray combustion in different high-temperature, high-pressure facilities.

    SciTech Connect (OSTI)

    Christiansen, Caspar; Hermant, Laurent; Malbec, Louis-Marie; Bruneaux, Gilles; Genzale, Caroline L.; Pickett, Lyle M.; Schramm, Jesper

    2010-05-01

    Diesel spray experiments at controlled high-temperature and high-pressure conditions offer the potential for an improved understanding of diesel combustion, and for the development of more accurate CFD models that will ultimately be used to improve engine design. Several spray chamber facilities capable of high-temperature, high-pressure conditions typical of engine combustion have been developed, but uncertainties about their operation exist because of the uniqueness of each facility. For the IMEM meeting, we describe results from comparative studies using constant-volume vessels at Sandia National Laboratories and IFP. Targeting the same ambient gas conditions (900 K, 60 bar, 22.8 kg/m{sup 3}, 15% oxygen) and sharing the same injector (common rail, 1500 bar, KS1.5/86 nozzle, 0.090 mm orifice diameter, n-dodecane, 363 K), we describe detailed measurements of the temperature and pressure boundary conditions at each facility, followed by observations of spray penetration, ignition, and combustion using high-speed imaging. Performing experiments at the same high-temperature, high-pressure operating conditions is an objective of the Engine Combustion Network (http://www.ca.sandia.gov/ECN/), which seeks to leverage the research capabilities and advanced diagnostics of all participants in the ECN. We expect that this effort will generate a high-quality dataset to be used for advanced computational model development at engine conditions.

  20. Fe-rich ejecta in the supernova remnant G352.7–0.1 with Suzaku

    SciTech Connect (OSTI)

    Sezer, A.; Gök, F.

    2014-07-20

    In this work, we present results from a ?201.6 ks observation of G352.7–0.1 using the X-ray Imaging Spectrometer on board Suzaku X-ray Observatory. The X-ray emission from the remnant is well described by two-temperature thermal models of non-equilibrium ionization with variable abundances with a column density of N{sub H} ? 3.3 × 10{sup 22} cm{sup –2}. The soft component is characterized by an electron temperature of kT{sub e} ? 0.6 keV, an ionization timescale of ? ? 3.4 × 10{sup 11} cm{sup –3} s, and enhanced Si, S, Ar, and Ca abundances. The hard component has kT{sub e} ? 4.3 keV, ? ? 8.8 × 10{sup 9} cm{sup –3} s, and enhanced Fe abundance. The elemental abundances of Si, S, Ar, Ca, and Fe are found to be significantly higher than the solar values that confirm the presence of ejecta. We detected strong Fe K-shell emission and determined its origin to be the ejecta for the first time. The detection of Fe ejecta with a lower ionization timescale favors a Type Ia origin for this remnant.

  1. XMM-NEWTON OBSERVATIONS OF LUMINOUS SOURCES IN NEARBY GALAXIES NGC 4395, NGC 4736, AND NGC 4258

    SciTech Connect (OSTI)

    Akyuz, A.; Avdan, H.; Kayaci, S.; Ozel, M. E.; Sonbas, E.; Balman, S.

    2013-03-15

    We present the results of a study of non-nuclear discrete sources in a sample of three nearby spiral galaxies (NGC 4395, NGC 4736, and NGC 4258) based on XMM-Newton archival data supplemented with Chandra data for spectral and timing analyses. A total of 75 X-ray sources have been detected within the D{sub 25} regions of the target galaxies. The large collecting area of XMM-Newton makes the statistics sufficient to obtain spectral fitting for 16 (about 20%) of these sources. Compiling the extensive archival exposures available, we were able to obtain the detailed spectral shapes of diverse classes of point sources. We have also studied temporal properties of these luminous sources. Eleven of them are found to show short-term (less than 80 ks) variation while eight of them show long-term variation within factors of {approx}2-5 during a time interval of {approx}2-12 years. Timing analysis provides strong evidence that most of these sources are accreting X-ray binary systems. One source that has properties different from others was suspected to be a supernova remnant, and our follow-up optical observation confirmed this. Our results indicate that sources within the three nearby galaxies are showing a variety of source populations, including several ultraluminous X-ray sources, X-ray binaries, transients together with a super soft source, and a background active galactic nucleus candidate.

  2. MOA-2007-BLG-197: Exploring the brown dwarf desert

    E-Print Network [OSTI]

    Ranc, C; Albrow, M D; Kubas, D; Bond, I A; Batista, V; Beaulieu, J -P; Bennett, D P; Dominik, M; Dong, Subo; Fouqué, P; Gould, A; Greenhill, J; Jørgensen, U G; Kains, N; Menzies, J; Sumi, T; Bachelet, E; Coutures, C; Dieters, S; Prester, D Dominis; Donatowicz, J; Gaudi, B S; Han, C; Hundertmark, M; Horne, K; Kane, S R; Lee, C -U; Marquette, J -B; Park, B -G; Pollard, K R; Sahu, K C; Street, R; Tsapras, Y; Wambsganss, J; Williams, A; Zub, M; Abe, F; Fukui, A; Itow, Y; Masuda, K; Matsubara, Y; Muraki, Y; Ohnishi, K; Rattenbury, N; Saito, To; Sullivan, D J; Sweatman, W L; Tristram, P J; Yock, P C M; Yonehara, A

    2015-01-01

    We present the analysis of MOA-2007-BLG-197Lb, the first brown dwarf companion to a Sun-like star detected through gravitational microlensing. The event was alerted and followed-up photometrically by a network of telescopes from the PLANET, MOA, and uFUN collaborations, and observed at high angular resolution using the NaCo instrument at the VLT. From the modelling of the microlensing light curve, we derived the binary lens separation in Einstein radius units (s~1.13) and a mass ratio of (4.732+/-0.020)x10^{-2}. Annual parallax, lens orbital motion and finite source effects were included in the models. To recover the lens system's physical parameters, we combined the resulting light curve best-fit parameters with (J,H,Ks) magnitudes obtained with VLT NaCo and calibrated using IRSF and 2MASS data. We derived a lens total mass of 0.86+/-0.04 Msun and a lens distance of 4.2+/-0.3 kpc. We find that the companion of MOA-2007-BLG-197L is a brown dwarf of 41+/-2 Mjup observed at a projected separation of 4.3+/-0.1 A...

  3. Features of temperature control of fuel element cladding for pressurized water nuclear reactor “WWER-1000” while simulating reactor accidents

    SciTech Connect (OSTI)

    Zaytsev, P. A.; Priymak, S. V.; Usachev, V. B.; Oleynikov, P. P.; Soldatkin, D. M. [Scientific Research Institute, Scientific Industrial Association LUCH, Podolsk (Russian Federation)] [Scientific Research Institute, Scientific Industrial Association LUCH, Podolsk (Russian Federation)

    2013-09-11

    During the experiments simulating NPR (nuclear power reactor) accidents with a coolant loss fuel elements behavior in a steam-hydrogen medium was studied at the temperature changed with the rate from 1 to 100K/s within the range of 300÷1500 °C. Indications of the thermocouples fixed on the cladding notably differ from real values of the cladding temperatures in the area of measuring junction due to thermal resistance influence of the transition zones “cladding-junction” and “junction-coolant”. The estimating method of a measurement error was considered which can provide adequate accounting of the influence factors. The method is based on thermal probing of a thermocouple by electric current flashing through thermoelements under the coolant presence or absence, a response time registration and processing, calculation of thermal inertia value for a thermocouple junction. A formula was derived for calculation of methodical error under stationary mode and within the stage of linear increase in temperature, which will determine the conditions for the cladding depressurization. Some variants of the formula application were considered, and the values of methodical errors were established which reached ?5% of maximum value by the final moment of the stage of linear increase in the temperature.

  4. Stochastic Modeling of Overtime Occupancy and Its Application in Building Energy Simulation and Calibration

    SciTech Connect (OSTI)

    Sun, Kaiyu; Yan , Da; Hong , Tianzhen; Guo, Siyue

    2014-02-28

    Overtime is a common phenomenon around the world. Overtime drives both internal heat gains from occupants, lighting and plug-loads, and HVAC operation during overtime periods. Overtime leads to longer occupancy hours and extended operation of building services systems beyond normal working hours, thus overtime impacts total building energy use. Current literature lacks methods to model overtime occupancy because overtime is stochastic in nature and varies by individual occupants and by time. To address this gap in the literature, this study aims to develop a new stochastic model based on the statistical analysis of measured overtime occupancy data from an office building. A binomial distribution is used to represent the total number of occupants working overtime, while an exponential distribution is used to represent the duration of overtime periods. The overtime model is used to generate overtime occupancy schedules as an input to the energy model of a second office building. The measured and simulated cooling energy use during the overtime period is compared in order to validate the overtime model. A hybrid approach to energy model calibration is proposed and tested, which combines ASHRAE Guideline 14 for the calibration of the energy model during normal working hours, and a proposed KS test for the calibration of the energy model during overtime. The developed stochastic overtime model and the hybrid calibration approach can be used in building energy simulations to improve the accuracy of results, and better understand the characteristics of overtime in office buildings.

  5. Pre-ignition laser ablation of nanocomposite energetic materials

    SciTech Connect (OSTI)

    Stacy, S. C.; Massad, R. A.; Pantoya, M. L. [Department of Mechanical Engineering, Texas Tech University, Lubbock, Texas 79409 (United States)] [Department of Mechanical Engineering, Texas Tech University, Lubbock, Texas 79409 (United States)

    2013-06-07

    Laser ignition of energetic material composites was studied for initiation with heating rates from 9.5 Multiplication-Sign 10{sup 4} to 1.7 Multiplication-Sign 10{sup 7} K/s. This is a unique heating rate regime for laser ignition studies because most studies employ either continuous wave CO{sub 2} lasers to provide thermal ignition or pulsed Nd:YAG lasers to provide shock ignition. In this study, aluminum (Al) and molybdenum trioxide (MoO{sub 3}) nanoparticle powders were pressed into consolidated pellets and ignited using a Nd:YAG laser (1064 nm wavelength) with varied pulse energy. Results show reduced ignition delay times corresponding to laser powers at the ablation threshold for the sample. Heating rate and absorption coefficient were determined from an axisymmetric heat transfer model. The model estimates absorption coefficients from 0.1 to 0.15 for consolidated pellets of Al + MoO{sub 3} at 1064 nm wavelength. Ablation resulted from fracturing caused by a rapid increase in thermal stress and slowed ignition of the pellet.

  6. Horizons cannot save the Landscape

    E-Print Network [OSTI]

    Iosif Bena; Alex Buchel; Oscar J. C. Dias

    2012-12-20

    Solutions with anti-D3 branes in a Klebanov-Strassler geometry with positive charge dissolved in fluxes have a certain singularity corresponding to a diverging energy density of the RR and NS-NS three-form fluxes. There are many hopes and arguments for and against this singularity, and we attempt to settle the issue by examining whether this singularity can be cloaked by a regular event horizon. This is equivalent to the existence of asymptotically Klebanov-Tseytlin or Klebanov-Strassler black holes whose charge measured at the horizon has the opposite sign to the asymptotic charge. We find that no such KT solution exists. Furthermore, for a large class of KS black holes we considered, the charge at the horizon must also have the same sign as the asymptotic charge, and is completely determined by the temperature, the number of fractional branes and the gaugino masses of the dual gauge theory. Our result suggests that antibrane singularities in backgrounds with charge in the fluxes are unphysical, which in turn raises the question as to whether antibranes can be used to uplift AdS vacua to deSitter ones. Our results also point out to a possible instability mechanism for the antibranes.

  7. RossiXTE monitoring of 4U 1636-53: I. Long-term evolution and kHz Quasi-Periodic Oscillations

    E-Print Network [OSTI]

    Tomaso Belloni; Jeroen Homan; Sara Motta; Eva Ratti; Mariano Mendez

    2007-05-06

    We have monitored the atoll-type neutron star low-mass X-ray binary 4U 1636-53 with the Rossi X-Ray Timing Explorer (RXTE) for more than 1.5 years. Our campaign consisted of short (~2 ks) pointings separated by two days, regularly monitoring the spectral and timing properties of the source. During the campaign we observed a clear long-term oscillation with a period of ~30-40 days, already seen in the light curves from the RXTE All-Sky Monitor, which corresponded to regular transitions between the hard (island) and soft (banana) states. We detected kHz QPOs in about a third of the observations, most of which were in the soft (banana) state. The distribution of the frequencies of the peak identified as the lower kHz QPO is found to be different from that previously observed in an independent data set. This suggests that the kHz QPOs in the system shows no intrinsically preferred frequency.

  8. A look with BeppoSAX at the low-luminosity Galactic X-ray source 4U 2206+54

    E-Print Network [OSTI]

    N. Masetti; D. Dal Fiume; L. Amati; S. Del Sordo; F. Frontera; M. Orlandini; E. Palazzi

    2004-05-21

    A pointed observation of the low-luminosity galactic source 4U 2206+54 was carried out in November 1998 with BeppoSAX. The light curve of 4U 2206+54 shows erratic variability on a timescale of about 1 hour; neither hardness variations nor time periodicities are detected throughout this 67 ks long observation. Thanks to the wide spectral coverage capabilities of BeppoSAX we could observe the source X-ray continuum over three energy decades, from 0.6 to 60 keV. The spectrum could be equally well fitted either with a blackbody plus Comptonization or with a high energy cutoff power law. No iron emission around 6.5 keV was detected, while a tentative detection of a cyclotron resonant feature in absorption is presented. Comparison of the present BeppoSAX data with the information available in the literature for this source suggests that 4U 2206+54 is a close binary system in which a (possibly magnetized) NS is accreting from the companion star wind.

  9. NuSTAR Reveals Relativistic Reflection But No Ultra-Fast Outflow In The Quasar PG 1211+143

    E-Print Network [OSTI]

    Zoghbi, A; Walton, D J; Harrison, F A; Fabian, A C; Reynolds, C S; Boggs, S E; Christensen, F E; Craig, W; Hailey, C J; Stern, D; Zhang, W W

    2015-01-01

    We report on four epochs of observations of the quasar PG 1211+143 using NuSTAR. The net exposure time is 300 ks. Prior work on this source found suggestive evidence of an 'ultra-fast outflow' (or, UFO) in the Fe K band, with a velocity of approximately 0.1c. The putative flow would carry away a high mass flux and kinetic power, with broad implications for feedback and black hole-galaxy co-evolution. NuSTAR detects PG 1211+143 out to 30 keV, meaning that the continuum is well-defined both through and above the Fe K band. A characteristic relativistic disk reflection spectrum is clearly revealed, via a broad Fe K emission line and Compton back-scattering curvature. The data offer only weak constraints on the spin of the black hole. A careful search for UFO's show no significant absorption feature above 90% confidence. The limits are particularly tight when relativistic reflection is included. We discuss the statistics and the implications of these results in terms of connections between accretion onto quasars,...

  10. Swift observations of GRB 070110: an extraordinary X-ray afterglow powered by the central engine

    E-Print Network [OSTI]

    Troja, E; O'Brien, P; Zhang, B; Sbarufatti, B; Mangano, V; Willingale, R; Chincarini, G; Osborne, J P; Marshall, F E; Burrows, D N; Campana, S; Gehrels, N; Guidorzi, C; Krimm, H A; La Parola, V; Liang, E W; Mineo, T; Moretti, A; Page, K L; Romano, P; Tagliaferri, G; Zhang, B B

    2007-01-01

    We present a detailed analysis of Swift multi-wavelength observations of GRB 070110 and its remarkable afterglow. The early X-ray light curve, interpreted as the tail of the prompt emission, displays a spectral evolution already seen in other gamma-ray bursts. The optical afterglow shows a shallow decay up to ~2 d after the burst, which is not consistent with standard afterglow models. The most intriguing feature is a very steep decay in the X-ray flux at ~20 ks after the burst, ending an apparent plateau. The abrupt drop of the X-ray light curve rules out an external shock as the origin of the plateau in this burst and implies long-lasting activity of the central engine. The temporal and spectral properties of the plateau phase point towards a continuous central engine emission rather than the episodic emission of X-ray flares. We suggest that the observed X-ray plateau is powered by a spinning down central engine, possibly a millisecond pulsar, which dissipates energy at an internal radius before depositing...

  11. Swift observations of GRB 070110: an extraordinary X-ray afterglow powered by the central engine

    E-Print Network [OSTI]

    E. Troja; G. Cusumano; P. O'Brien; B. Zhang; B. Sbarufatti; V. Mangano; R. Willingale; G. Chincarini; J. P. Osborne; F. E. Marshall; D. N. Burrows; S. Campana; N. Gehrels; C. Guidorzi; H. A. Krimm; V. La Parola; E. W. Liang; T. Mineo; A. Moretti; K. L. Page; P. Romano; G. Tagliaferri; B. B. Zhang; M. J. Page; P. Schady

    2007-05-01

    We present a detailed analysis of Swift multi-wavelength observations of GRB 070110 and its remarkable afterglow. The early X-ray light curve, interpreted as the tail of the prompt emission, displays a spectral evolution already seen in other gamma-ray bursts. The optical afterglow shows a shallow decay up to ~2 d after the burst, which is not consistent with standard afterglow models. The most intriguing feature is a very steep decay in the X-ray flux at ~20 ks after the burst, ending an apparent plateau. The abrupt drop of the X-ray light curve rules out an external shock as the origin of the plateau in this burst and implies long-lasting activity of the central engine. The temporal and spectral properties of the plateau phase point towards a continuous central engine emission rather than the episodic emission of X-ray flares. We suggest that the observed X-ray plateau is powered by a spinning down central engine, possibly a millisecond pulsar, which dissipates energy at an internal radius before depositing energy into the external shock.

  12. Role of spall in microstructure evolution during laser-shock-driven rapid undercooling and resolidification

    SciTech Connect (OSTI)

    Colvin, Jeffrey D.; Jankowski, Alan F.; Kumar, Mukul; MoberlyChan, Warren J.; Reed, Bryan W.; Paisley, Dennis L.; Tierney, Thomas E.

    2009-01-01

    We previously reported [Colvin et al., J. Appl. Phys. 101, 084906 (2007)] on the microstructure morphology of pure Bi metal subjected to rapid laser-shock-driven melting and subsequent resolidification upon release of pressure, where the estimated effective undercooling rates were of the order of 10{sup 9}-10{sup 10} K/s. More recently, we repeated these experiments, but with a Bi/Zn alloy (Zn atomic fraction of 2%-4%) instead of elemental Bi and with a change in target design to suppress spall in the Bi/Zn samples. We observed a similar microstructure morphology in the two sets of experiments, with initially columnar grains recrystallizing to larger equiaxed grains. The Bi samples, however, exhibited micron-scale dendrites on the spall surfaces, whereas there were no dendritic structures anywhere in the nonspalled Bi/Zn, even down to the nanometer scale as observed by transmission electron microscopy. We present the simulations and the interferometry data that show that the samples in the two sets of experiments followed nearly identical hydrodynamic and thermodynamic paths apart from the presence of (probably partially liquid) spall in pure Bi. Simulations also show that the spall occurs right at the moving phase front and, hence, the spall itself cuts off the principal direction for latent heat dissipation across the phase boundary. We suggest that it is the liquid spall itself that creates the conditions for dendrite formation.

  13. Formation mechanisms of precursors of radiation-induced color centers during fabrication of silica optical fiber preform

    SciTech Connect (OSTI)

    Tomashuk, A. L.; Zabezhailov, M. O.

    2011-04-15

    Samples in the form of transverse slices of rods and optical fiber preforms made from the high-hydroxyl KU-1 and low-hydroxyl KS-4V silica by the plasma outside deposition (POD) method are {gamma}-irradiated to a dose of {approx}1 MGy (SiO{sub 2}). Next, the radial dependences of the radiation-induced nonbridging oxygen hole center (NBOHC) and E'-center (three-coordinated silicon) in the samples are constructed by measuring the amplitudes of their 4.8 and 5.8 eV absorption bands, respectively. Based on the analysis of these radial dependences and considering the temperature and duration of the preirradiation heat treatment of the rods and preforms at the POD-installation, we determine the ratio of the oscillator strengths of the above bands and the microscopic thermoinduced processes occurring during preform fabrication and producing precursors of the radiation-induced NBOHC and E'-center. These processes are found to be associated with the escape of either H{sub 2} or H{sub 2}O from neighboring hydroxyl groups, and, therefore, can occur in high-hydroxyl silica only. It is concluded that enhancement of the radiation resistance of high-hydroxyl silica optical fibers requires decreasing the temperature and duration of the preform fabrication process, in particular, changing from the POD-technology to the low-temperature plasmachemical vapor deposition (PCVD) or surface PCVD (SPCVD)-technology.

  14. Periodic Accretion Instabilities in the Protostar L1634 IRS 7

    E-Print Network [OSTI]

    Hodapp, Klaus W

    2015-01-01

    The small molecular cloud Lynds 1634 contains at least three outflow sources. We found one of these, IRS 7, to be variable with a period of 37.14 +/- 0.04 days and an amplitude of approximately 2 mag in the Ks band. The light curve consists of a quiescent phase with little or no variation, and a rapid outburst phase. During the outburst phase, the rapid brightness variation generates light echoes that propagate into the surrounding molecular cloud, allowing a measurement of the distance to IRS 7 of 404 pc +/- 35 pc. We observed only a marginally significant change in the H - K color during the outburst phase. The K-band spectrum of IRS 7 shows CO bandhead emission but its equivalent width does not change significantly with the phase of the light curve. The H_2 1-0 S(1) line emission does not follow the variability of the continuum flux. We also used the imaging data for a proper motion study of the outflows originating from the IRS 7 and the FIR source IRAS 05173-0555, and confirm that these are indeed distin...

  15. Multiwavelength Observations of NaSt1 (WR 122): Equatorial Mass Loss and X-rays from an Interacting Wolf-Rayet Binary

    E-Print Network [OSTI]

    Mauerhan, Jon C; Van Dyk, Schuyler D; Morzinski, Katie M; Close, Laird M; Hinz, Philip M; Males, Jared R; Rodigas, Timothy J

    2015-01-01

    NaSt1 (aka Wolf-Rayet 122) is a peculiar emission-line star embedded in an extended nebula of [N II] emission with a compact dusty core. This object was characterized by Crowther & Smith (1999) as a Wolf-Rayet (WR) star cloaked in an opaque nebula of CNO-processed material, perhaps analogous to Eta Car and its Homunculus nebula, albeit with a hotter central source. To discern the morphology of the [N II] nebula we performed narrowband imaging using the Hubble Space Telescope and Wide-field Camera 3. The images reveal that the nebula has a disk-like geometry tilted 12 degrees from edge-on, composed of a bright central ellipsoid surrounded by a larger clumpy ring. Ground-based spectroscopy reveals radial velocity structure (~10 km/s) near the outer portions of the nebula's major axis, which is likely to be the imprint of outflowing gas. Near-infrared adaptive-optics imaging with Magellan AO has resolved a compact ellipsoid of Ks-band emission aligned with the larger [N II] nebula, which we suspect is the re...

  16. Penguin-dominated B -> PV decays in NLO perturbative QCD

    E-Print Network [OSTI]

    Hsiang-nan Li; Satoshi Mishima

    2006-11-15

    We study the penguin-dominated B -> PV decays, with P (V) representing a pseudo-scalar (vector) meson, in the next-to-leading-order (NLO) perturbative QCD (PQCD) formalism, concentrating on the B -> K phi, pi K^*, rho K, and omega K modes. It is found that the NLO corrections dramatically enhance the B -> rho K, omega K branching ratios, which were estimated to be small under the naive factorization assumption. The patterns of the direct CP asymmetries A_{CP}(B^0 -> rho^\\mp K^\\pm) \\approx A_{CP}(B^\\pm -> rho^0 K^\\pm) and |A_{CP}(B^0 -> pi^\\mp K^{*\\pm})| > |A_{CP}(B^\\pm -> pi^0 K^{*\\pm})| are predicted, differing from |A_{CP}(B^0 -> pi^\\mp K^\\pm)| >> |A_{CP}(B^\\pm -> pi^0 K^\\pm)|. The above patterns, if confirmed by data, will support the source of strong phases from the scalar penguin annihilation in PQCD. The results for the mixing-induced CP asymmetries S_f are consistent with those obtained in the literature, except that our S_{rho^0 K_S} is as low as 0.5.

  17. Analysis of data from sensitive U.S. monitoring stations for the Fukushima Dai-ichi nuclear reactor accident

    SciTech Connect (OSTI)

    Biegalski, Steven R.; Bowyer, Ted W.; Eslinger, Paul W.; Friese, Judah I.; Greenwood, Lawrence R.; Haas, Derek A.; Hayes, James C.; Hoffman, Ian; Keillor, Martin E.; Miley, Harry S.; Morin, Marc P.

    2012-12-01

    The March 11, 2011 9.0 magnitude undersea megathrust earthquake off the coast of Japan and subsequent tsunami waves triggered a major nuclear event at the Fukushima Dai-ichi nuclear power station. At the time of the event, units 1, 2, and 3 were operating and units 4, 5, and 6 were in a shutdown condition for maintenance. Loss of cooling capacity to the plants along with structural damage caused by the earthquake and tsunami resulted in a breach of the nuclear fuel integrity and release of radioactive fission products to the environment. Fission products started to arrive in the United States via atmospheric transport on March 15, 2011 and peaked by March 23, 2011. Atmospheric activity concentrations of 131I reached levels of 3.0 * 10*2 Bqm*3 in Melbourne, FL. The noble gas 133Xe reached atmospheric activity concentrations in Ashland, KS of 17 Bqm*3. While these levels are not health concerns, they were well above the detection capability of the radionuclide monitoring systems within the International Monitoring System of the Comprehensive Nuclear-Test-Ban Treaty.

  18. Variations in Zircaloy-4 cladding deformation in replicate LOCA simulation tests. [PWR

    SciTech Connect (OSTI)

    Longest, A.W.; Crowley, J.L.; Chapman, R.H.

    1982-09-01

    Five single-rod, heated-shroud replicate burst tests were conducted to study statistical variations in Zircaloy cladding deformation under simulated loss-of-coolant accident conditions. The test conditions used (low steam coolant flow and a heating rate of approx. 10 K/s to tube failure at approx. 775/sup 0/C) were conductive to large deformation and matched those used in two of the Multirod Burst Test Program bundle tests so that the results could be used to aid in interpretation of differences observed for individual rods in bundle tests. The largest variation observed was in burst strain, which ranged from 50 to 96%. Burst temperature ranged from 767 to 779/sup 0/C, burst pressure from 9405 to 9870 kPa, average strain over the heated length from 18 to 23%, and tube volume increase from 39 to 51%. As expected, cladding deformation was influenced by small temperature gradients: the more uniform the temperature, the greater (and more uniform) the deformation.

  19. Boundary effects on Zircaloy-4 cladding deformation in LOCA simulation tests. [PWR; BWR

    SciTech Connect (OSTI)

    Longest, A.W.; Chapman, R.H.; Crowley, J.L.

    1982-01-01

    Deformation behavior of Zircaloy-4 cladding under simulated loss-of-coolant accident (LOCA) conditions is being investigated in the Multirod Burst Test (MRBT) program in single rod and multirod tests. In these tests, internally-pressurized unirradiated Zircaloy-4 tubes containing internal electrical heaters are heated to failure in a low-pressure, superheated-steam environment (200 < Re < 800). The results provide a data base for evaluating deformation and blockage models employed with design-basis accident sequences to assess LWR core coolability for licensing purposes. Results of a recent 8 X 8 test indicate that models derived from smaller test arrays may not be representative of the behavior in large arrays, particularly for those temperature ranges in which large deformation can be expected. Two MRBT LOCA simulation tests conducted under the same nominal conditions (approx. 10 K/s heating rate from approx. 340/sup 0/C to failure at approx. 770/sup 0/C) were examined to determine the effects of array size and boundary conditions on deformation.

  20. The geological distribution of mixed-layered kaolinite/expandables (K/E) and its importance within the kaolin group

    SciTech Connect (OSTI)

    Hughes, R.E.; Moore, D.M. (Illinois State Geological Survey, Champaign, IL (United States))

    1993-03-01

    Kaolin-group minerals form in soils by at least three alteration pathways: (1) halloysite forms under pH and ionic extremes, and continues to increase in crystallinity and crystallite sizes along its alteration pathway; (2) mixed-layered kaolinite/smectite or kaolinite/expandables (K/S or K/E) forms from 2:1 layer silicates and contains true expandable layers and inherited Fe[sup VI] and Al[sup IV] within its 7[angstrom] layers. Minor increases in crystallinity and crystallite size accompany further alteration along the K/E pathway; and (3) well-crystallized kaolinites, dickites, and nacrites precipitate from solution, mostly in reducing environments where Fe[sup 2+] is removed from solution by crystallization of sulfides or carbonates. Kaolinite formed along pathways 1 and 2 retains attributes of parent material, whereas kaolinite from pathway 3 retains little. K/E occurs in Recent loessal soils of the Midwest and in related glacigenic paleosols, Quaternary-Pliocene paleosols, Eocene ball clays and their source paleosols on the Porters Creek Clay, Jurassic paleosols in Ireland, and Pennsylvanian underclays. The characteristic properties of K/E imprint kaolinite formed along this pathway. The frequency with which this imprint is being found suggests that K/E is spatially and chronologically more widespread than previously reported and that wider recognition of this imprint will increase the understanding of many kaolin occurrences.

  1. The LEECH Exoplanet Imaging Survey: Orbit and Component Masses of the Intermediate Age, Late-Type Binary NO UMa

    E-Print Network [OSTI]

    Schlieder, Joshua E; Maire, Anne-Lise; Desidera, Silvano; Hinz, Philip; Skrutskie, Michael F; Leisenring, Jarron; Bailey, Vanessa; Defrere, Denis; Esposito, Simone; Strassmeier, Klaus G; Weber, Michael; Biller, Beth A; Bonnefoy, Mickael; Buenzli, Esther; Close, Laird M; Crepp, Justin R; Eisner, Josh A; Hofmann, Karl-Heinz; Henning, Thomas; Morzinski, Katie M; Schertl, Dieter; Weigelt, Gerd; Woodward, Charles E

    2015-01-01

    We present high-resolution Large Binocular Telescope LBTI/LMIRcam images of the spectroscopic and astrometric binary NO UMa obtained as part of the LBTI Exozodi Exoplanet Common Hunt (LEECH) exoplanet imaging survey. Our H, K$_s$, and L'-band observations resolve the system at angular separations velocity data to solve the full orbital solution and estimate component masses. The masses of the K2.0$\\pm$0.5 primary and K6.5$\\pm$0.5 secondary are 0.83$\\pm$0.02 M$_{\\odot}$ and 0.64$\\pm$0.02 M$_{\\odot}$, respectively. We also derive a system distance of d = 25.87$\\pm$0.02 pc and revise the Galactic kinematics of NO UMa. Our revised Galactic kinematics confirm NO UMa as a nuclear member of the ~500 Myr old Ursa Major moving group and it is thus a mass and age benchmark. We compare the masses of the NO UMa bi...

  2. SIMULTANEOUS X-RAY AND RADIO OBSERVATIONS OF ROTATING RADIO TRANSIENT J1819-1458

    SciTech Connect (OSTI)

    Miller, J. J.; McLaughlin, M. A. [Department of Physics, West Virginia University, Morgantown, WV 26506 (United States); Rea, N. [Institut de Ciències de l'Espai (IEEC-CSIC) Campus UAB, Fac. de Ciències, Torre C5, parell, 2a planta, E-08193 Barcelona (Spain); Lazaridis, K.; Keane, E. F.; Kramer, M. [Max Planck Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn (Germany); Lyne, A. [Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Manchester M13 9PL (United Kingdom)

    2013-10-20

    We present the results of simultaneous radio and X-ray observations of PSR J1819–1458. Our 94 ks XMM-Newton observation of the high magnetic field (?5 × 10{sup 13} G) pulsar reveals a blackbody spectrum (kT ? 130 eV) with a broad absorption feature, possibly composed of two lines at ?1.0 and ?1.3 keV. We performed a correlation analysis of the X-ray photons with radio pulses detected in 16.2 hr of simultaneous observations at 1-2 GHz with the Green Bank, Effelsberg, and Parkes telescopes, respectively. Both the detected X-ray photons and radio pulses appear to be randomly distributed in time. We find tentative evidence for a correlation between the detected radio pulses and X-ray photons on timescales of less than 10 pulsar spin periods, with the probability of this occurring by chance being 0.46%. This suggests that the physical process producing the radio pulses may also heat the polar-cap.

  3. A Compact X-ray Source in the Radio Pulsar-Wind Nebula G141.2+5.0

    E-Print Network [OSTI]

    Reynolds, Stephen P

    2016-01-01

    We report the results of a 50 ks Chandra observation of the recently discovered radio object G141.2+5.0, presumed to be a pulsar-wind nebula. We find a moderately bright unresolved X-ray source which we designate CXOU J033712.8 615302 coincident with the central peak radio emission. An absorbed power-law fit to the 241 counts describes the data well, with absorbing column $N_H = 6.7 (4.0, 9.7) \\times 10^{21}$ cm$^{-2}$ and photon index $\\Gamma = 1.8 (1.4, 2.2)$. For a distance of 4 kpc, the unabsorbed luminosity between 0.5 and 8 keV is $ 1.7^{+0.4}_{-0.3} \\times 10^{32}$ erg s$^{-1}$ (90\\% confidence intervals). Both $L_X$ and $\\Gamma$ are quite typical of pulsars in PWNe. No extended emission is seen; we estimate a conservative $3 \\sigma$ upper limit to the surface brightness of any X-ray PWN near the point source to be $3 \\times 10^{-17}$ erg cm$^{-2}$ s$^{-1}$ arcsec$^{-2}$ between 0.5 and 8 keV, assuming the same spectrum as the point source; for a nebula of diameter $13"$, the flux limit is 6\\% of the f...

  4. Neutral Hydrogen Tully Fisher Relation: The case for Newtonian Gravity

    E-Print Network [OSTI]

    Sayan Chakraborti; Satej Khedekar

    2011-09-02

    Intrinsic luminosities are related to rotation velocities of disk galaxies by Tully Fisher (TF) relations. The Baryonic TF (BTF) relation has recently been explained with Dark Matter and Newtonian Gravity as well as Modified Newtonian Dynamics (MOND). However, recent work has pointed out that the currently used BTF relation ignores the contribution from hot gas and oversimplifies complex galaxy-scale physics. In this Letter, we advocate the use of the Neutral Hydrogen TF (HITF) relationship, which is free from dust obscuration and stellar evolution effects, as a clean probe of gravity and dynamics in the weak field regime. We incorporate the physics of hot gas from supernova feedback which drives the porosity of the Interstellar Medium (ISM). A simple model that includes supernovae feedback, is generalized to include a parametrized effective gravitational force law. We test our model against a catalogue of galaxies, spanning the full range of disks from dwarf galaxies to giant spirals, to demonstrate that a Kennicutt-Schmidt (KS) law for star formation and simple Newtonian gravity is adequate for explaining the observed HI scaling relations. The data rules out MOND-like theories, within the scope of this model.

  5. Simultaneous NuSTAR/Chandra observations of the Bursting Pulsar GRO J1744-28 during its third reactivation

    E-Print Network [OSTI]

    Younes, G; Grefenstette, B W; Tomsick, J A; Tennant, A; Finger, M H; Furst, F; Pottschmidt, K; Bhalerao, V; Boggs, S E; Boirin, L; Chakrabarty, D; Christensen, F E; Craig, W W; Degenaar, N; Fabian, A C; Gandhi, P; Gogus, E; Hailey, C J; Harrison, F A; Kennea, J A; Miller, J M; Stern, D; Zhang, W W

    2015-01-01

    We report on a 10 ks simultaneous Chandra/HETG-NuSTAR observation of the Bursting Pulsar, GRO J1744-28, during its third detected outburst since discovery and after nearly 18 years of quiescence. The source is detected up to 60 keV with an Eddington persistent flux level. Seven bursts, followed by dips, are seen with Chandra, three of which are also detected with NuSTAR. Timing analysis reveals a slight increase in the persistent emission pulsed fraction with energy (from 10% to 15%) up to 10 keV, above which it remains constant. The 0.5-70 keV spectra of the persistent and dip emission are the same within errors, and well described by a blackbody (BB), a power-law with an exponential rolloff, a 10 keV feature, and a 6.7 keV emission feature, all modified by neutral absorption. Assuming that the BB emission originates in an accretion disc, we estimate its inner (magnetospheric) radius to be about 4x10^7 cm, which translates to a surface dipole field B~9x10^10 G. The Chandra/HETG spectrum resolves the 6.7 keV ...

  6. A closer view of the IGR J11014-6103 outflows

    E-Print Network [OSTI]

    Pavan, L; Bordas, P; Audard, M; Balbo, M; Bozzo, E; Eckert, D; Ferrigno, C; Filipovi?, M D; Verdugo, M; Walter, R

    2015-01-01

    The complex X-ray system IGR J11014-6103 (a.k.a. the Lighthouse nebula) is composed of a bow-shock pulsar wind nebula (PWN) as well as large-scale jet-like features, all launched by IGR J11014-6103 which is moving supersonically in the interstellar medium. Previous observations suggested that the jet features stem from a ballistic jet of relativistic particles. In order to confirm the nature of the jet and the marginally detected counter-jet, we obtained a new deep 250 ks Chandra observation of the Lighthouse nebula. We performed detailed spatial and spectral analysis of all X-ray components of the system. The X-ray PWN is now better resolved and shows a clear bi-modal morphology. The overall helical pattern of the main jet is confirmed. However, there are large deviations from a simple helical model at small and large scales. Significant extended emission is now detected, encompassing the main jet all along its length. The brightness dip of the main jet at ~50" distance from the pulsar is confirmed, the exte...

  7. A nearby M star with three transiting super-Earths discovered by K2

    E-Print Network [OSTI]

    Crossfield, Ian J M; Schlieder, Joshua; Howard, Andrew W; Fulton, B J; Aller, Kimberly M; Ciardi, David R; Lepine, Sebastien; Barclay, Thomas; de Pater, Imke; de Kleer, Katherine; Quintana, Elisa V; Christiansen, Jessie L; Schlafly, Eddie; Kaltenegger, Lisa; Crepp, Justin R; Henning, Thomas; Obermeier, Christian; Deacon, Niall; Hansen, Brad M S; Liu, Michael C; Greene, Tom; Howell, Steve B; Barman, Travis; Mordasini, Christoph

    2015-01-01

    Small, cool planets represent the typical end-products of planetary formation. Studying the archi- tectures of these systems, measuring planet masses and radii, and observing these planets' atmospheres during transit directly informs theories of planet assembly, migration, and evolution. Here we report the discovery of three small planets orbiting a bright (Ks = 8.6 mag) M0 dwarf using data collected as part of K2, the new transit survey using the re-purposed Kepler spacecraft. Stellar spectroscopy and K2 photometry indicate that the system hosts three transiting planets with radii 1.5-2.1 R_Earth, straddling the transition region between rocky and increasingly volatile-dominated compositions. With orbital periods of 10-45 days the planets receive just 1.5-10x the flux incident on Earth, making these some of the coolest small planets known orbiting a nearby star; planet d is located near the inner edge of the system's habitable zone. The bright, low-mass star makes this system an excellent laboratory to deter...

  8. Microphysics and dynamics of the Gamma-Ray Burst GRB 121024A

    E-Print Network [OSTI]

    Varela, K; Greiner, J; Schady, P; Elliott, J; Sudilovsky, V; Krühler, T; Bolmer, J; Knust, F; Agurto, C; Azagra, F; Belloche, A; Bertoldi, F; De Breuck, C; Delvaux, C; Filgas, R; Graham, J; Guelbenzu, A Nicuesa; Kann, D A; Klose, S; Menten, K M; Rau, A; Rossi, A; Schmidl, S; Schuller, F; Schweyer, T; Tanga, M; Weiss, A; Wiseman, P; Wyrowski, F

    2015-01-01

    Using multi-epoch broad-band observations of the GRB 121024A afterglow, we measure the three characteristic break frequencies of the synchrotron spectrum. We use 6 epochs of combined XRT and GROND data to constrain the temporal slope, the dust extinction and the spectral slope with high accuracy. Two further epochs of combined data from XRT, GROND, APEX, CARMA and EVLA are used to set constraints on the break frequencies and therefore on the micro-physical and dynamical parameters. The XRT and GROND light curves show a simultaneous break at around 42 ks. No spectral evolution is observed between the afterglow SEDs before and after the break. As a result, the crossing of the synchrotron cooling break is not suitable as an explanation for the break in the light curve. The multi-wavelength data give us a unique opportunity to discern between two plausible scenarios explaining the break: the end of energy injection and a jet break. The observations are explained by two possible scenarios, a jet break and an energ...

  9. A Panchromatic View OF NGC 602: Time-Resolved Star Formation with the Hubble and Spitzer Space Telescopes

    E-Print Network [OSTI]

    Carlson, Lynn Redding; Meixner, Margaret; Romita, Krista A; Whitney, Barbara; Hora, Joseph L; Cignoni, M; Sabbi, E; Nota, A; Sirianni, M; Smith, L J; Gordon, K; Babler, B; Bracker, S; Gallagher, J S; Meade, M; Misselt, K; Pasquali, A; Shiao, B

    2010-01-01

    We present the photometric catalogs for the star-forming cluster NGC 602 in the wing of the Small Magellanic Cloud covering a range of wavelengths from optical HST/ACS (F555W, F814W) and SMARTS/ANDICAM (V, I) to infrared (Spitzer/IRAC 3.6, 4.5, 5.8, and 8 micron and MIPS 24 micron). Combining this with IRSF (InfraRed Survey Facility) near-infrared photometry (J, H, Ks), we compare the young main sequence (MS) and pre-main sequence (PMS) populations prominent in the optical with the current young stellar object (YSO) populations revealed by the infrared (IR). We analyze the MS and PMS population with isochrones in color-magnitude diagrams to derive ages and masses. The optical data reveal ~565 PMS candidates, low mass Stage III YSOs. We characterize ~40 YSOs by fitting their spectral energy distributions (SEDs) to a grid of models (Robitaille et al. 2007) to derive luminosities, masses and evolutionary phase (Stage I-III). The higher resolution HST images reveal that ~70% of the YSO candidates are either multi...

  10. The Properties of H{\\alpha} Emission-Line Galaxies at $z$ = 2.24

    E-Print Network [OSTI]

    An, F X; Wang, W -H; Huang, J -S; Kong, X; Wang, J -X; Fang, G W; Zhu, F; Gu, Q -S; Wu, H; Hao, L; Xia, X -Y

    2014-01-01

    Using deep narrow-band $H_2S1$ and $K_{s}$-band imaging data obtained with CFHT/WIRCam, we identify a sample of 56 H$\\alpha$ emission-line galaxies (ELGs) at $z=2.24$ with the 5$\\sigma$ depths of $H_2S1=22.8$ and $K_{s}=24.8$ (AB) over 383 arcmin$^{2}$ area in the ECDFS. A detailed analysis is carried out with existing multi-wavelength data in this field. Three of the 56 H$\\alpha$ ELGs are detected in Chandra 4 Ms X-ray observation and two of them are classified as AGNs. The rest-frame UV and optical morphologies revealed by HST/ACS and WFC3 deep images show that nearly half of the H$\\alpha$ ELGs are either merging systems or with a close companion, indicating that the merging/interacting processes play a key role in regulating star formation at cosmic epoch z=2-3; About 14% are too faint to be resolved in the rest-frame UV morphology due to high dust extinction. We estimate dust extinction form SEDs. We find that dust extinction is generally correlated with H$\\alpha$ luminosity and stellar mass (SM). Our res...

  11. Quinary metallic glass alloys

    DOE Patents [OSTI]

    Lin, Xianghong (Pasadena, CA); Johnson, William L. (Pasadena, CA)

    1998-01-01

    At least quinary alloys form metallic glass upon cooling below the glass transition temperature at a rate less than 10.sup.3 K/s. Such alloys comprise zirconium and/or hafnium in the range of 45 to 65 atomic percent, titanium and/or niobium in the range of 4 to 7.5 atomic percent, and aluminum and/or zinc in the range of 5 to 15 atomic percent. The balance of the alloy compositions comprise copper, iron, and cobalt and/or nickel. The composition is constrained such that the atomic percentage of iron is less than 10 percent. Further, the ratio of copper to nickel and/or cobalt is in the range of from 1:2 to 2:1. The alloy composition formula is: (Zr,Hf).sub.a (Al,Zn).sub.b (Ti,Nb).sub.c (Cu.sub.x Fe.sub.y (Ni,Co).sub.z).sub.d wherein the constraints upon the formula are: a ranges from 45 to 65 atomic percent, b ranges from 5 to 15 atomic percent, c ranges from 4 to 7.5 atomic percent, d comprises the balance, d.multidot.y is less than 10 atomic percent, and x/z ranges from 0.5 to 2.

  12. Deep Chandra Monitoring Observations of NGC 4278: Catalog of Source Properties

    E-Print Network [OSTI]

    Brassington, N J; Kim, D W; Zezas, A; Zepf, S; Kundu, A; Angelini, L; Davies, R L; Gallagher, J; Kalogera, V; Fragos, T; King, A R; Pellegrini, S; Trinchieri, G

    2009-01-01

    We present the properties of the discrete X-ray sources detected in our monitoring program of the globular cluster (GC) rich elliptical galaxy, NGC 4278, observed with Chandra ACIS-S in six separate pointings, resulting in a co-added exposure of 458-ks. From this deep observation, 236 sources have been detected within the region overlapped by all observations, 180 of which lie within the D25 ellipse of the galaxy. These 236 sources range in Lx from 3.5E36 erg/s (with 3sigma upper limit 1E38 erg/s. From X-ray source photometry, it has been determined that the majority of the 236 point sources that have well constrained colors, have values that are consistent with typical LMXB spectra, with 29 of these sources expected to be background objects from the logN-logS relation. There are 103 sources in this population that exhibit long-term variability, indicating that they are accreting compact objects. 3 of these sources have been identified as transient candidates, with a further 3 possible transients. Spectral va...

  13. Glucose oxidase-graphene-chitosan modified electrode for direct electrochemistry and glucose sensing

    SciTech Connect (OSTI)

    Kang, Xinhuang; Wang, Jun; Wu, Hong; Aksay, Ilhan A.; Liu, Jun; Lin, Yuehe

    2009-11-01

    Direct electrochemistry of a glucose oxidase (GOD)/graphene/chitosan nanocomposite was studied. The immobilized enzyme retains its bioactivity, exhibits a surface confined, reversible two-proton and two-electron transfer reaction, and has good stability, activity and a fast heterogeneous electron transfer rate with the rate constant (ks) of 2.83 s-1. A much higher enzyme loading (1.12 × 10-9 mol/cm2) is obtained as compared to the bare glass carbon surface. This GOD/graphene/chitosan nanocomposite film can be used for sensitive detection of glucose. The biosensor exhibits a wider linearity range from 0.08 mM to 12 mM glucose with a detection limit of 0.02 mM and much higher sensitivity (37.93 ?A mM-1 cm-2) as compared with other nanostructured supports. The excellent performance of the biosensor is attributed to large surface-to-volume ratio and high conductivity of graphene, and good biocompatibility of chitosan, which enhances the enzyme absorption and promotes direct electron transfer between redox enzymes and the surface of electrodes.

  14. Variability in a Young, L/T Transition Planetary-Mass Object

    E-Print Network [OSTI]

    Biller, Beth A; Bonavita, Mariangela; Buenzli, Esther; Baxter, Claire; Crossfield, Ian J M; Allers, Katelyn; Liu, Michael C; Bonnefoy, Mickaël; Deacon, Niall; Brandner, Wolfgang; Schlieder, Joshua E; Dupuy, Trent; Kopytova, Taisiya; Manjavacas, Elena; Allard, France; Homeier, Derek; Henning, Thomas

    2015-01-01

    As part of our ongoing NTT SoFI survey for variability in young free-floating planets and low mass brown dwarfs, we detect significant variability in the young, free-floating planetary mass object PSO J318.5-22, likely due to rotational modulation of inhomogeneous cloud cover. A member of the 23$\\pm$3 Myr $\\beta$ Pic moving group, PSO J318.5-22 has T$_\\mathrm{eff}$ = 1160$^{+30}_{-40}$ K and a mass estimate of 8.3$\\pm$0.5 M$_{Jup}$ for a 23$\\pm$3 Myr age. PSO J318.5-22 is intermediate in mass between 51 Eri b and $\\beta$ Pic b, the two known exoplanet companions in the $\\beta$ Pic moving group. With variability amplitudes from 7-10$\\%$ in J$_{S}$ at two separate epochs over 3-5 hour observations, we constrain the rotational period of this object to $>$5 hours. In K$_{S}$, we marginally detect a variability trend of up to 3$\\%$ over a 3 hour observation. This is the first detection of weather on an extrasolar planetary mass object. Among L dwarfs surveyed at high-photometric precision ($<$3$\\%$) this is the...

  15. Metallic glass alloys of Zr, Ti, Cu and Ni

    DOE Patents [OSTI]

    Lin, Xianghong (Pasadena, CA); Peker, Atakan (Pasadena, CA); Johnson, William L. (Pasadena, CA)

    1997-01-01

    At least quaternary alloys form metallic glass upon cooling below the glass transition temperature at a rate less than 10.sup.3 K/s. Such alloys comprise titanium from 19 to 41 atomic percent, an early transition metal (ETM) from 4 to 21 atomic percent and copper plus a late transition metal (LTM) from 49 to 64 atomic percent. The ETM comprises zirconium and/or hafnium. The LTM comprises cobalt and/or nickel. The composition is further constrained such that the product of the copper plus LTM times the atomic proportion of LTM relative to the copper is from 2 to 14. The atomic percentage of ETM is less than 10 when the atomic percentage of titanium is as high as 41, and may be as large as 21 when the atomic percentage of titanium is as low as 24. Furthermore, when the total of copper and LTM are low, the amount of LTM present must be further limited. Another group of glass forming alloys has the formula (ETM.sub.1-x Ti.sub.x).sub.a Cu.sub.b (Ni.sub.1-y Co.sub.y).sub.c wherein x is from 0.1 to 0.3, y.cndot.c is from 0 to 18, a is from 47 to 67, b is from 8 to 42, and c is from 4 to 37. This definition of the alloys has additional constraints on the range of copper content, b.

  16. Determination of the specific growth of molds on semi-solid cultures

    SciTech Connect (OSTI)

    Carrizalez, V.; Rodriguez, H.; Sardina, I.

    1981-02-01

    The determination of growth constants of Aspergillus niger were obtained for semisolid cultures on cassava flour, Manihot esculenta, as a sole carbon source. As a consequence, a technique was developed that consisted of the use of a packed-bed microfermentor with a working volume of 16 cubic centimetres. The bed consisted of gelatinized and granulated cassava flour containing material nutrients and mold spores. The carbon dioxide produced during the respiration was drawn off with a current of air and then absorbed in a solution of sodium hydroxide. The absorption of CO/sub 2/, P, was correlated with the specific growth rate mu by means of the equation P equals Kemut, where t is time and K is a constant. Ammonium nitrogen was used as a limiting substrate and its concentration was varied from 0.039 to 2.5% in dry base. The maximum growth rate, mu maximum, and the saturation constant, Ks, were 0.31/hour and 0.065 mmol (N/sub 4/)/sub 2/SO/sub 4//g total dry solids. The proposed method is highly recommended for the evaluation of the semisolid fermentation of molds and for strictly aerobic bacteria and yeasts. It can be used especially in the evaluation of the growth of microorganisms on peanut shells, coffee residues, sugar cane bagasse, and other agricultural wastes.

  17. An Ultradeep High Resolution X-ray Image of M101 The X-ray Source Population in a Late-type Spiral

    E-Print Network [OSTI]

    Wang, Q D; Pietsch, W; Immler, Stefan; Pietsch, Wolfgang

    1999-01-01

    We have studied the X-ray source population of the face-on spiral galaxy M101 (NGC 5457). Within a field of radius 17' (36 kpc at the distance of 7.2 Mpc), covered by an ultradeep (229 ks) ROSAT HRI image, 51 X-ray sources are detected with signal-to-noise ratios greater than 3.5. About half of these sources are associated with the galaxy. We determine the average luminosity distribution of the sources. We have examined spatial, spectral, and timing properties of the X-ray sources. In particular, we have explored the nature of various superluminous X-ray sources with luminosities significantly greater than the Eddington limit for a $\\sim 1.6 M_\\odot$ object (neutron star). These X-ray sources, detected in various ROSAT HRI and PSPC observations, are not transients and appear to result from recent massive star formation in outer spiral arms. 3 superluminous PSPC sources are associated with giant HII complexes and are clearly resolved. 2 other superluminous RHRI sources are likely associated with shell-like sup...

  18. Detection of X-ray-Emitting Hypernova Remnants in M101

    E-Print Network [OSTI]

    Wang, Q D

    1999-01-01

    Based on an ultra deep (230 ks) ROSAT HRI imaging of M101, we have detected 5 X-ray sources that coincide spatially with optical emission line features previously classified as supernova remnants in this nearby galaxy. Two of these coincidences (SNR MF83 and NGC5471B) most likely represent the true physical association of X-ray emission with shock-heated interstellar gas. MF83, with a radius of ~ 134 pc, is one of the largest remnants known. NGC5471B, with a radius of 30 pc and a velocity of at least 350 km/s (FWZI), is extremely bright in both radio and optical. The X-ray luminosities of these two shell-like remnants are $\\sim 1$ and $3 \\times 10^{38} ergs/s$ (0.5-2 keV), about an order of magnitude brighter than the brightest supernova remnants known in our Galaxy and in the Magellanic Clouds. The inferred blastwave energy is $\\sim 3 \\times 10^{52} ergs$ for NGC5471B and $\\sim 3 \\times 10^{53}$ ergs for MF83. Therefore, the remnants likely originate in hypernovae, which are a factor of being responsible for...

  19. On Estimating the High-Energy Cutoff in the X-ray Spectra of Black Holes via Reflection Spectroscopy

    E-Print Network [OSTI]

    Garcia, Javier A; Steiner, James F; McClintock, Jeffrey E; Keck, Mason L; Wilms, Joern

    2015-01-01

    The fundamental parameters describing the coronal spectrum of an accreting black hole are the slope $\\Gamma$ of the power-law continuum and the energy $E_{cut}$ at which it rolls over. Remarkably, this parameter can be accurately measured for values as high as 1 MeV by modeling the spectrum of X-rays reflected from a black hole accretion disk at energies below 100 keV. This is possible because the details in the reflection spectrum, rich in fluorescent lines and other atomic features, are very sensitive to the spectral shape of the hardest coronal radiation illuminating the disk. We show that fitting simultaneous NuSTAR (3-79 keV) and low-energy (e.g., Suzaku) data with the most recent version of our reflection model RELXILL, one can obtain reasonable constraints on $E_{cut}$ at energies from tens of keV up to 1 MeV, for a source as faint as 1 mCrab in a 100 ks observation.

  20. Exploring intermediate (5-40AU) scales around AB Aurigae with the Palomar Fiber Nuller

    E-Print Network [OSTI]

    Kuhn, Jonas; Liewer, Kurt; Martin, Stefan; Loya, Frank; Millan-Gabet, Rafael; Serabyn, Eugene

    2015-01-01

    We report on recent Ks-band interferometric observations of the young pre-main-sequence star AB Aurigae obtained with the Palomar Fiber Nuller (PFN). Reaching a contrast of a few 10-4 inside a field of view extending from 35 to 275 mas (5-40AU at AB Aur's distance), the PFN is able to explore angular scales that are intermediate between those accessed by coronagraphic imaging and long baseline interferometry. This intermediate region is of special interest given that many young stellar objects are believed to harbor extended halos at such angular scales. Using destructive interference (nulling) between two sub-apertures of the Palomar 200 inch telescope and rotating the telescope pupil, we measured a resolved circumstellar excess at all probed azimuth angles. The astrophysical null measured over the full rotation is fairly constant, with a mean value of 1.52%, and a slight additional azimuthal modulation of +/-0.2%. The isotropic astrophysical null is indicative of circumstellar emission dominated by an azimu...

  1. Ground-based near-IR observations of the secondary eclipse of CoRoT-2b

    E-Print Network [OSTI]

    Alonso, R; Kabath, P; Rabus, M

    2010-01-01

    We present the results of a ground-based search for the secondary eclipse of the 3.3 Mjup transiting planet CoRoT-2b. We performed near infrared photometry using the LIRIS instrument on the 4.2 m William Herschel Telescope, in the H and K_s filters. We monitored the star around two expected secondary eclipses in two nights under very good observing conditions. For the depth of the secondary eclipse we find in H-band a 3 sigma upper limit of 0.17%, whereas we detected a tentative eclipse with a depth of 0.16+-0.09% in the K_s-band. These depths can be translated into brightness temperatures of T_H<2250 K and T_{K_s} = 1890(+260-350) K, which indicate an inefficient re-distribution of the incident stellar flux from the planet's dayside to its nightside. Our results are in agreement with the CoRoT optical measurement (Alonso et al. 09) and with Spitzer 4.5 and 8 micron results (Gillon et al. 09c).

  2. Near-infrared Study of the Carina Nebula

    E-Print Network [OSTI]

    Sanchawala, Kaushar; Ojha, Devendra; Ghosh, Swarna Kanti; Nakajima, Yasushi; Tamura, Motohide; Baba, Daisuke; Sato, Shuji; Tsujimoto, Masahiro

    2007-01-01

    We have carried out near-infrared (NIR) imaging observations of the Carina Nebula for an area of ~400 sq. arcmin. including the star clusters Trumpler 14 (Tr 14) and Trumpler 16 (Tr 16). With 10 sigma limiting magnitudes of J ~ 18.5, H ~ 17.5 and K_s ~ 16.5, we identified 544 Class II and 11 Class I young star candidates. We find some 40 previously unknown very red sources with H-K_s > 2, most of which remain undetected at the J band. The red NIR sources are found to be concentrated to the south-east of Tr 16, along the `V' shaped dust lane, where the next generation of stars seems to be forming. In addition, we find indications of ongoing star formation near the three MSX point sources, G287.51-0.49, G287.47-0.54, and G287.63-0.72. A handful of red NIR sources are seen to populate around each of these MSX sources. Apart from this, we identified two hard Chandra X-ray sources near G287.47-0.54, one of which does not have an NIR counterpart and may be associated with a Class I/Class 0 object. The majority of t...

  3. X-Ray Spectroscopy of the Classical Nova V458 Vulpeculae with Suzaku

    E-Print Network [OSTI]

    Tsujimoto, Masahiro; Drake, Jeremy J; Ness, Jan-Uwe; Kitamoto, Shunji

    2008-01-01

    We conducted a target of opportunity X-ray observation of the classical nova V458 Vulpeculae 88 days after the explosion using the Suzaku satellite. With a 20 ks exposure, the X-ray Imaging Spectrometer detected X-ray emission significantly harder than typical super-soft source emission. The X-ray spectrum shows K lines from N, Ne, Mg, Si, and S, and L-series emission from Fe in highly ionized states. The spectrum can be described by a single temperature (0.64 keV) thin thermal plasma model in collisional equilibrium with a hydrogen-equivalent extinction column density of ~3e21/cm2, a flux of ~1e-12 erg/s/cm2, and a luminosity of ~6e34 erg/s in the 0.3-3.0 keV band at an assumed distance of 13 kpc. We found a hint of an enhancement of N and deficiencies of O and Fe relative to other metals. The observed X-ray properties can be interpreted as the emission arising from shocks of ejecta from an ONe-type nova.

  4. An X-ray Imaging Study of the Stellar Population in RCW49

    E-Print Network [OSTI]

    Tsujimoto, M; Broos, P S; Churchwell, E B; Feigelson, E D; Garmire, G P; Getman, K V; Nagayama, T; Tamura, M; Townsley, L K; Wang, J

    2007-01-01

    We present the results of a high-resolution X-ray imaging study of the stellar population in the Galactic massive star-forming region RCW49 and its central OB association Westerlund 2. We obtained a 40 ks X-ray image of a 17'x17' field using the Chandra X-ray Observatory and deep NIR images using the Infrared Survey Facility in a concentric 8'3x8'3 region. We detected 468 X-ray sources and identified optical, NIR, and Spitzer Space Telescope MIR counterparts for 379 of them. The unprecedented spatial resolution and sensitivity of the X-ray image, enhanced by optical and infrared imaging data, yielded the following results: (1) The central OB association Westerlund 2 is resolved for the first time in the X-ray band. X-ray emission is detected from all spectroscopically-identified early-type stars in this region. (2) Most (86%) X-ray sources with optical or infrared identifications are cluster members in comparison with a control field in the Galactic Plane. (3) A loose constraint (2--5 kpc) for the distance to...

  5. ASTRO-H White Paper - Low-mass X-ray Binaries

    E-Print Network [OSTI]

    Done, C; Cackett, E; Herder, J W den; Dotani, T; Enoto, T; Ferrigno, C; Kallman, T; Kohmura, T; Laurent, P; Miller, J; Mineshige, S; Mori, H; Nakazawa, K; Paerels, F; Sakurai, S; Soong, Y; Sugita, S; Takahashi, H; Tamagawa, T; Tanaka, Y; Terada, Y; Uno, S

    2014-01-01

    There is still 10-20% uncertainty on the neutron star (NS) mass-radius relation. These uncertainties could be reduced by an order of magnitude through an unambiguous measure of M/R from the surface redshift of a narrow line, greatly constraining the Equation of State for ultra-dense material. It is possible that the SXS on ASTRO-H can detect this from an accreting neutron star with low surface velocity in the line of sight i.e. either low inclination or low spin. Currently there is only one known low inclination LMXB, Ser X-1, and one known slow spin LMXB, J17480-2446 in Terzan 5. Ser X-1 is a persistent source which is always in the soft state (banana branch), where the accreting material should form a equatorial belt around the neutron star. A pole-on view should then allow the NS surface to be seen directly. A 100 ks observation should allow us to measure M/R if there are any heavy elements in the photosphere at the poles. Conversely, J17480-2446 in Terzan 5 is a transient accretion powered millisecond pul...

  6. An X-ray Census of Young Stars in the Massive Southern Star-Forming Complex NGC 6357

    E-Print Network [OSTI]

    Wang, J; Feigelson, E D; Getman, K V; Broos, P S; Garmire, G P; Tsujimoto, M; Wang, Junfeng; Townsley, Leisa K.; Feigelson, Eric D.; Getman, Konstantin V.; Broos, Patrick S.; Garmire, Gordon P.; Tsujimoto, Masahiro

    2006-01-01

    We present the first high spatial resolution X-ray study of the massive star forming region NGC 6357, obtained in a 38 ks Chandra/ACIS observation. Inside the brightest constituent of this large HII region complex is the massive open cluster Pismis 24. It contains two of the brightest and bluest stars known, yet remains poorly studied; only a handful of optically bright stellar members have been identified. We investigate the cluster extent and Initial Mass Function and detect ~800 X-ray sources with a limiting sensitivity of 10^{30} ergs s^{-1}; this provides the first reliable probe of the rich intermediate-mass and low-mass population of this massive cluster, increasing the number of known members from optical study by a factor of ~50. The high luminosity end (log L_h[2-8 keV]\\ge 30.3 ergs s^{-1}) of the observed X-ray luminosity function in NGC 6357 is clearly consistent with a power law relation as seen in the Orion Nebula Cluster and Cepheus B, yielding the first estimate of NGC 6357's total cluster pop...

  7. Hard X-rays from Ultra-Compact HII Regions in W49A

    E-Print Network [OSTI]

    Tsujimoto, M; Feigelson, E D; Getman, K V; Broos, P S

    2006-01-01

    We report the Chandra detection of hard X-ray emission from the Welch ring in W49A, an organized structure of ultra-compact (UC) HII regions containing a dozen nascent early-type stars. Two UC HII regions are associated with hard X-ray emission in a deep Advanced CCD Imaging Spectrometer image exposed for 96.7 ks. One of the two X-ray sources has no near-infrared counterpart and is extended by ~5 arcsec, or ~0.3 pc, at a distance of ~11.4 kpc, which is spatially aligned with the cometary radio continuum emission associated with the UC HII region. The X-ray spectrum of the emission, when fit with a thermal model, indicates a heavily absorbed plasma with extinction of \\~5x10^{23}/cm^{2}, temperature of ~7 keV, and X-ray luminosity in the 3.0-8.0 keV band of ~3x10^{33} ergs/s. Both the luminosity and the size of the emission resemble the extended hard emission found in UC HII regions in Sagittarius B2, yet they are smaller by an order of magnitude than the emission found in massive star clusters such as NGC 3603...

  8. X-ray Development of the Classical Nova V2672 Ophiuchi with Suzaku

    E-Print Network [OSTI]

    Takei, D; Drake, J J; Kitamoto, S

    2013-01-01

    We report the Suzaku detection of a rapid flare-like X-ray flux amplification early in the development of the classical nova V2672 Ophiuchi. Two target-of-opportunity ~25 ks X-ray observations were made 12 and 22 days after the outburst. The flux amplification was found in the latter half of day 12. Time-sliced spectra are characterized by a growing supersoft excess with edge-like structures and a relatively stable optically-thin thermal component with Ka emission lines from highly ionized Si. The observed spectral evolution is consistent with a model that has a time development of circumstellar absorption, for which we obtain the decline rate of ~10-40 % in a time scale of 0.2 d on day 12. Such a rapid drop of absorption and short-term flux variability on day 12 suggest inhomogeneous ejecta with dense blobs/holes in the line of sight. Then on day 22 the fluxes of both supersoft and thin-thermal plasma components become significantly fainter. Based on the serendipitous results we discuss the nature of this so...

  9. Evidence for Environmental Changes in the Submillimeter Dust Opacity

    E-Print Network [OSTI]

    Martin, Peter G; Bontemps, Sylvain; Miville-Deschênes, Marc-Antoine; Ade, Peter A R; Bock, James J; Chapin, Edward L; Devlin, Mark J; Dicker, Simon R; Griffin, Matthew; Gundersen, Joshua O; Halpern, Mark; Hargrave, Peter C; Hughes, David H; Klein, Jeff; Marsden, Gaelen; Mauskopf, Philip; Netterfield, Calvin B; Olmi, Luca; Patanchon, Guillaume; Rex, Marie; Scott, Douglas; Semisch, Christopher; Truch, Matthew D P; Tucker, Carole; Tucker, Gregory S; Viero, Marco P; Wiebe, Donald V

    2011-01-01

    The submillimeter opacity of dust in the diffuse Galactic interstellar medium (ISM) has been quantified using a pixel-by-pixel correlation of images of continuum emission with a proxy for column density. We used three BLAST bands at 250, 350, and 500 \\mu m and one IRAS at 100 \\mu m. The proxy is the near-infrared color excess, E(J-Ks), obtained from 2MASS. Based on observations of stars, we show how well this color excess is correlated with the total hydrogen column density for regions of moderate extinction. The ratio of emission to column density, the emissivity, is then known from the correlations, as a function of frequency. The spectral distribution of this emissivity can be fit by a modified blackbody, whence the characteristic dust temperature T and the desired opacity \\sigma_e(1200) at 1200 GHz can be obtained. We have analyzed 14 regions near the Galactic plane toward the Vela molecular cloud, mostly selected to avoid regions of high column density (N_H > 10^{22} cm^-2) and small enough to ensure a u...

  10. Testing the nonlinearity of the BVIcJHKs period-luminosity relations for the Large Magellanic Cloud Cepheids

    E-Print Network [OSTI]

    C. Ngeow; S. Kanbur; A. Nanthakumar

    2007-10-26

    A number of recent works have suggested that the period-luminosity (PL) relation for the Large Magellanic Cloud (LMC) Cepheids exhibits a controversial nonlinear feature with a break period at 10 days. Therefore, the aim of this Research Note is to test the linearity/nonlinearity of the PL relations for the LMC Cepheids in BVIcJHKs band, as well as in the Wesenheit functions. We show that simply comparing the long and short period slopes, together with their associate d standard deviations, leads to a strictly larger error rate than applying rigorous statistical tests such as the F-test. We applied various statistical tests to the current published LMC Cepheid data. These statistical tests include the F-test, the testimator test, and the Schwarz information criterion (SIC) method. The results from these statistical tests strongly suggest that the LMC PL relation is nonlinear in BVIcJH band but linear in the Ks band and in the Wesenheit functions. Using the properties of period-color relations at maximum light and multi-phase relations, we believe that the nonlinear PL relation is not caused by extinction errors.

  11. NuSTAR and Swift observations of the black hole candidate XTE J1908+094 during its 2013 outburst

    E-Print Network [OSTI]

    Tao, Lian; Walton, Dominic J; Furst, Felix; Kennea, Jamie; Miller, Jon M; Boggs, Steven E; Christensen, Finn E; Craig, William W; Gandhi, Poshak; Grefenstette, Brian W; Hailey, Charles J; Harrison, Fiona A; Krimm, Hans A; Pottschmidt, Katja; Stern, Daniel; Tendulkar, Shriharsh P; Zhang, William W

    2015-01-01

    The black hole candidate XTE J1908+094 went into outburst for the first time since 2003 in October 2013. We report on an observation with the Nuclear Spectroscopic Telescope Array (NuSTAR) and monitoring observations with Swift during the outburst. NuSTAR caught the source in the soft state: the spectra show a broad relativistic iron line, and the light curves reveal a ~40 ks flare with the count rate peaking about 40% above the non-flare level and with significant spectral variation. A model combining a multi-temperature thermal component, a power-law, and a reflection component with an iron line provides a good description of the NuSTAR spectrum. Although relativistic broadening of the iron line is observed, it is not possible to constrain the black hole spin with these data. The variability of the power-law component, which can also be modeled as a Comptonization component, is responsible for the flux and spectral change during the flare, suggesting that changes in the corona (or possibly continued jet act...

  12. Chandra Observations of SNR RCW 103

    E-Print Network [OSTI]

    Frank, Kari A; Park, Sangwook

    2015-01-01

    We analyze three Chandra observations, with a combined exposure time of 99 ks, of the Galactic supernova remnant RCW 103, a young supernova remnant, previously with no clear detection of metal-rich ejecta. Based on our imaging and spectral analyses of these deep Chandra data, we find evidence for metal-rich ejecta emission scattered throughout the remnant. X-ray emission from the shocked ejecta is generally weak, and the shocked circumstellar medium (CSM) is a largely dominant component across the entire remnant. The CSM component shows abundances of ~0.5 solar, while Ne, Mg, Si, S, and Fe abundances of the ejecta are up to a few times solar. Comparison of these ejecta abundances with yields from supernova nucleosynthesis models suggests, together with the existence of a central neutron star, a progenitor mass of ~18-20 M$_\\odot$, though the Fe/Si ratios are larger than predicted. The shocked CSM emission suggests a progenitor with high mass-loss rate and subsolar metallicity.

  13. The XMM-Newton view of the central degrees of the Milky Way

    E-Print Network [OSTI]

    Ponti, G; Terrier, R; Haberl, F; Sturm, R; Clavel, M; Soldi, S; Goldwurm, A; Predehl, P; Nandra, K; Belanger, G; Warwick, R S; Tatischeff, V

    2015-01-01

    The deepest XMM-Newton mosaic map of the central 1.5 deg of the Galaxy is presented, including a total of about 1.5 Ms of EPIC-pn cleaned exposures in the central 15" and about 200 ks outside. This compendium presents broad-band X-ray continuum maps, soft X-ray intensity maps, a decomposition into spectral components and a comparison of the X-ray maps with emission at other wavelengths. Newly-discovered extended features, such as supernova remnants (SNRs), superbubbles and X-ray filaments are reported. We provide an atlas of extended features within +-1 degree of Sgr A*. We discover the presence of a coherent X-ray emitting region peaking around G0.1-0.1 and surrounded by the ring of cold, mid-IR-emitting material known from previous work as the "Radio Arc Bubble" and with the addition of the X-ray data now appears to be a candidate superbubble. Sgr A's bipolar lobes show sharp edges, suggesting that they could be the remnant, collimated by the circumnuclear disc, of a SN explosion that created the recently d...

  14. Deep Chandra observation and numerical studies of the nearest cluster cold front in the sky

    E-Print Network [OSTI]

    Werner, N; Zhuravleva, I; Ichinohe, Y; Simionescu, A; Allen, S W; Markevitch, M; Fabian, A C; Keshet, U; Roediger, E; Ruszkowski, M; Sanders, J S

    2015-01-01

    We present the results of a very deep (500 ks) Chandra observation, along with tailored numerical simulations, of the nearest, best resolved cluster cold front in the sky, which lies 90 kpc (19 arcmin) to the northwest of M 87. The northern part of the front appears the sharpest, with a width smaller than 2.5 kpc (1.5 Coulomb mean free paths; at 99 per cent confidence). Everywhere along the front, the temperature discontinuity is narrower than 4-8 kpc and the metallicity gradient is narrower than 6 kpc, indicating that diffusion, conduction and mixing are suppressed across the interface. Such transport processes can be naturally suppressed by magnetic fields aligned with the cold front. However, the northwestern part of the cold front is observed to have a nonzero width. The broadening is consistent with the presence of Kelvin-Helmholtz instabilities (KHI) on length scales of a few kpc. Based on comparison with simulations, the presence of KHI would imply that the effective viscosity of the intra-cluster medi...

  15. Late-time Evolution of Composite Supernova Remnants: Deep Chandra Observations and Hydrodynamical Modeling of a Crushed Pulsar Wind Nebula in SNR G327.1-1.1

    E-Print Network [OSTI]

    Temim, Tea; Kolb, Christopher; Blondin, John; Hughes, John P; Bucciantini, Niccolo

    2015-01-01

    In an effort to better understand the evolution of composite supernova remnants (SNRs) and the eventual fate of relativistic particles injected by their pulsars, we present a multifaceted investigation of the interaction between a pulsar wind nebula (PWN) and its host SNR G327.1-1.1. Our 350 ks Chandra X-ray observations of SNR G327.1-1.1 reveal a highly complex morphology; a cometary structure resembling a bow shock, prong-like features extending into large arcs in the SNR interior, and thermal emission from the SNR shell. Spectral analysis of the non-thermal emission offers clues about the origin of the PWN structures, while enhanced abundances in the PWN region provide evidence for mixing of supernova ejecta with PWN material. The overall morphology and spectral properties of the SNR suggest that the PWN has undergone an asymmetric interaction with the SNR reverse shock (RS) that can occur as a result of a density gradient in the ambient medium and/or a moving pulsar that displaces the PWN from the center ...

  16. X-ray analysis of the proper motion and pulsar wind nebula for PSR J1741-2054

    E-Print Network [OSTI]

    Auchettl, Katie; Romani, Roger W; Posselt, Bettina; Pavlov, George G; Kargaltsev, Oleg; Ng, C-Y; Temim, Tea; Weisskopf, Martin C; Bykov, Andrei; Swartz, Douglas A

    2015-01-01

    We obtained six observations of PSR J1741-2054 using the $Chandra$ ACIS-S detector totaling $\\sim$300 ks. By registering this new epoch of observations to an archival observation taken 3.2 years earlier using X-ray point sources in the field of view, we have measured the pulsar proper motion at $\\mu =109 \\pm 10$ mas/yr. The spectrum of the pulsar can be described by an absorbed power law with photon index $\\Gamma$=2.68$\\pm$0.04, plus a blackbody with an emission radius of (4.5$^{+3.2}_{-2.5})d_{0.38}$ km, for a DM-estimated distance of $0.38d_{0.38}$ kpc and a temperature of $61.7\\pm3.0$ eV. Emission from the compact nebula is well described by an absorbed power law model with a photon index of $\\Gamma$ = 1.67$\\pm$0.06, while the diffuse emission seen as a trail extending northeast of the pulsar shows no evidence of synchrotron cooling. We also looked for extended features that might represent a jet or torus-like structure using image deconvolution and PSF-subtraction but we find no conclusive evidence of suc...

  17. Energy Dependence of Synchrotron X-Ray Rims in Tycho's Supernova Remnant

    E-Print Network [OSTI]

    Tran, Aaron; Petre, Robert; Ressler, Sean M; Reynolds, Stephen P

    2015-01-01

    Several young supernova remnants exhibit thin X-ray bright rims of synchrotron radiation at their forward shocks. Thin rims require strong magnetic field amplification beyond simple shock compression if rim widths are only limited by electron energy losses. But, magnetic field damping behind the shock could produce similarly thin rims with less extreme field amplification. Variation of rim width with energy may thus discriminate between competing influences on rim widths. We measured rim widths around Tycho's supernova remnant in 5 energy bands using an archival 750 ks Chandra observation. Rims narrow with increasing energy and are well described by either loss-limited or damped scenarios, so X-ray rim width-energy dependence does not uniquely specify a model. But, radio counterparts to thin rims are not loss-limited and better reflect magnetic field structure. Joint radio and X-ray modeling favors magnetic damping in Tycho's SNR with damping lengths ~1--5% of remnant radius and magnetic field strengths ~50--...

  18. Suzaku X-Ray Spectroscopy of a Peculiar Hot Star in the Galactic Center Region

    E-Print Network [OSTI]

    Yoshiaki Hyodo; Masahiro Tsujimoto; Katsuji Koyama; Shogo Nishiyama; Tetsuya Nagata; Itsuki Sakon; Hiroshi Murakami; Hironori Matsumoto

    2007-12-03

    We present the results of a Suzaku study of a bright point-like source in the 6.7 keV intensity map of the Galactic center region. We detected an intense FeXXV 6.7 keV line with an equivalent width of ~1 keV as well as emission lines of highly ionized Ar and Ca from a spectrum obtained by the X-ray Imaging Spectrometer. The overall spectrum is described very well by a heavily absorbed (~2x10^{23}cm^{-2}) thin thermal plasma model with a temperature of 3.8+/-0.6 keV and a luminosity of ~3x10^{34} erg s^{-1} (2.0--8.0 keV) at 8 kpc. The absorption, temperature, luminosity, and the 6.7 keV line intensity were confirmed with the archived XMM-Newton data. The source has a very red (J-Ks=8.2 mag) infrared spectral energy distribution (SED), which was fitted by a blackbody emission of ~1000 K attenuated by a visual extinction of ~31 mag. The high plasma temperature and the large X-ray luminosity are consistent with a wind-wind colliding Wolf-Rayet binary. The similarity of the SED to those of the eponymous Quintuplet cluster members suggests that the source is a WC-type source.

  19. X-Ray Spectroscopy of the Classical Nova V458 Vulpeculae with Suzaku

    E-Print Network [OSTI]

    Masahiro Tsujimoto; Dai Takei; Jeremy J. Drake; Jan-Uwe Ness; Shunji Kitamoto

    2008-10-17

    We conducted a target of opportunity X-ray observation of the classical nova V458 Vulpeculae 88 days after the explosion using the Suzaku satellite. With a 20 ks exposure, the X-ray Imaging Spectrometer detected X-ray emission significantly harder than typical super-soft source emission. The X-ray spectrum shows K lines from N, Ne, Mg, Si, and S, and L-series emission from Fe in highly ionized states. The spectrum can be described by a single temperature (0.64 keV) thin thermal plasma model in collisional equilibrium with a hydrogen-equivalent extinction column density of ~3e21/cm2, a flux of ~1e-12 erg/s/cm2, and a luminosity of ~6e34 erg/s in the 0.3-3.0 keV band at an assumed distance of 13 kpc. We found a hint of an enhancement of N and deficiencies of O and Fe relative to other metals. The observed X-ray properties can be interpreted as the emission arising from shocks of ejecta from an ONe-type nova.

  20. The Phoenix Deep Survey: the radio properties of the hard X-ray selected sample

    E-Print Network [OSTI]

    A. Georgakakis; A. M. Hopkins; J. Afonso; M. Sullivan; B. Mobasher; L. E. Cram

    2004-07-05

    The radio properties of hard (2-8keV) X-ray selected sources are explored by combining a single 50ks XMM-Newton pointing with the ultra-deep and homogeneous Phoenix radio (1.4GHz) survey (Hopkins et al. 2003). A total of 43 sources are detected above the X-ray flux limit f_X(2-8keV)=7.7e-15cgs with 14 of them exhibiting radio emission above ~40muJy (3sigma). The X-ray/radio matched population lies in the borderline between radio loud and quiet AGNs and comprises sources with both soft and hard X-ray spectral properties suggesting both obscured and unobscured systems. The spectroscopically identified sub-sample (total of 6 X-ray/radio matches) comprises narrow emission line AGNs (4) with hard X-ray spectral properties and broad line sources (2) with soft X-ray spectra. We find evidence that the fraction of X-ray/radio matches increases from ~20% for sources with rest-frame column density N_H1e22cm^-2 their combined spectrum exhibits a soft X-ray component that may be associated with star-formation activity, although other possibilities cannot be excluded. We also find that radio emitting AGNs make up about 13-20% of the hard-band X-ray background depending on the adopted normalisation.

  1. The Phoenix Deep Survey: Optical and near infrared imaging catalogs

    E-Print Network [OSTI]

    Mark Sullivan; Andrew Hopkins; Jose Afonso; Antonis Georgakakis; Ben Chan; Lawrence Cram; Bahram Mobasher; Cesario Almeida

    2004-11-19

    The Phoenix Deep Survey is a multi-wavelength galaxy survey based on deep 1.4 GHz radio imaging (Hopkins et al., 2003). The primary goal of this survey is to investigate the properties of star formation in galaxies and to trace the evolution in those properties to a redshift z=1, covering a significant fraction of the age of the Universe. By compiling a sample of star-forming galaxies based on selection at radio wavelengths we eliminate possible biases due to dust obscuration, a significant issue when selecting objects at optical and ultraviolet wavelengths. In this paper, we present the catalogs and results of deep optical (UBVRI) and near-infrared (Ks) imaging of the deepest region of the existing decimetric radio imaging. The observations and data-processing are summarised and the construction of the optical source catalogs described, together with the details of the identification of candidate optical counterparts to the radio catalogs. Based on our UBVRIKs imaging, photometric redshift estimates for the optical counterparts to the radio detections are explored.

  2. New XMM-Newton observation of the Phoenix cluster: properties of the cool core

    E-Print Network [OSTI]

    Tozzi, P; Molendi, S; Ettori, S; Santos, J S; De Grandi, S; Balestra, I; Rosati, P; Altieri, B; Cresci, G; Menanteau, F; Valtchanov, I

    2015-01-01

    (Abridged) We present a spectral analysis of a deep (220 ks) XMM-Newton observation of the Phoenix cluster (SPT-CL J2344-4243), which we also combine with Chandra archival ACIS-I data. We extract CCD and RGS X-ray spectra from the core region to search for the signature of cold gas, and constrain the mass deposition rate in the cooling flow which is thought to be responsible of the massive star formation episode observed in the BCG. We find an average mass deposition rate of $\\dot M = 620 (-190 +200)_{stat} (-50 +150)_{syst} M_\\odot$/yr in the temperature range 0.3-3.0 keV from MOS data. A temperature-resolved analysis shows that a significant amount of gas is deposited only above 1.8 keV, while upper limits of the order of hundreds of $M_\\odot$/yr can be put in the 0.3-1.8 keV temperature range. From pn data we obtain $\\dot M = 210 (-80 +85)_{stat} ( -35 +60)_{syst} M_\\odot$/yr, and the upper limits from the temperature-resolved analysis are typically a factor of 3 lower than MOS data. In the RGS spectrum, n...

  3. High-temperature phase transformation in Cr added TiAl base alloy

    SciTech Connect (OSTI)

    Abe, E.; Niinobe, K.; Nobuki, M.; Nakamura, M.; Tsujimoto, T.

    1999-07-01

    The authors have investigated a microstructure evolution of a Ti-48Al-3.5Cr (in at.%) alloy at high-temperatures ({gt} 1,473K). In the alloy annealed at 1673K for 1.8ks, followed by air-cooling, a characteristic microstructure with a feathery fashion was uniformly formed. From a cooling-rate-controlling study, it was found that formation of the feathery structure is accomplished during continuous cooling from 1673K to 1573K, within the {alpha} + {gamma} two-phase region. Transmission electron microscopy revealed that the feathery structure is composed of lamellar colonies (5--10{micro}m) which are crystallographically tilted slightly (a few degree) with their neighbors. A surprising fact is that lamellae in each colony are mostly the {gamma} phase with few {alpha}{sub 2} phase less than 5% in volume. This suggests that the feathery structure is a metastable product and has not resulted from the {alpha} {r{underscore}arrow} {alpha} + {gamma} transformation above 1,573 K. Instead, the feathery structure formation should be attributed to the non-equilibrium {alpha} {r{underscore}arrow} {gamma} transformation which occurs at high-temperatures with a small degree of supercooling. The authors discuss this interesting phase transformation in terms of the {alpha} {r{underscore}arrow} {gamma} massive transformation, based on the continuous-cooling-transformation (CCT) diagram constructed for the present alloy.

  4. A long look at the BALQSO LBQS 2212-1759 with XMM-Newton

    E-Print Network [OSTI]

    Jean Clavel; Norbert Schartel; Laura Tomas

    2005-09-15

    Very long (172 ks effective exposure time) observations of the BALQSO LBQS 2212-1759 with XMM-Newton yield a stringent upper-limit on its 0.2-10 keV (rest- frame 0.64-32.2 keV) flux, F 3.4 E25 cm-2. Such a large column has a Thomson optical depth to electron scattering tau > 23, sufficient to extinguish the optical and UV emission. The problem only gets worse if the gas is neutral since the opacity in the Lyman continuum becomes extremely large, > 2 E8, conflicting with the source detection below 912 A. This apparent contradiction probably means that our lines-of-sight to the X-ray and to the UV emitting regions are different, such that the gas covers completely the compact X-ray source but only partially the more extended source of ultraviolet photons. An extended (~ 1') X-ray source is detected 2' to the south-east of the QSO. Given its thermal spectrum and temperature (1.5 < T < 3.0 keV}, it is probably a foreground (0.29 < z < 0.46) cluster of galaxies.

  5. A CENSUS OF ROTATION AND VARIABILITY IN L1495: A UNIFORM ANALYSIS OF TRANS-ATLANTIC EXOPLANET SURVEY LIGHT CURVES FOR PRE-MAIN-SEQUENCE STARS IN TAURUS

    SciTech Connect (OSTI)

    Xiao Hongyu; Covey, Kevin R.; Lloyd, James P. [Department of Astronomy, Cornell University, 226 Space Sciences Building, Ithaca, NY 14853 (United States); Rebull, Luisa [Spitzer Science Center/Caltech, M/S 220-6, 1200 East California Boulevard, Pasadena, CA 91125 (United States); Charbonneau, David [Department of Astronomy, Harvard University, 60 Garden Street, Cambridge, MA 02138 (United States); Mandushev, Georgi [Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, AZ 86001 (United States); O'Donovan, Francis; Slesnick, Catherine [Astronomy Department, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125 (United States)

    2012-09-15

    We analyze light curves obtained by the Trans-atlantic Exoplanet Survey (TrES) for a field centered on the L1495 dark cloud in Taurus. The Spitzer Taurus Legacy Survey catalog identifies 179 bona fide Taurus members within the TrES field; 48 of the known Taurus members are detected by TrES, as well as 26 candidate members identified by the Spitzer Legacy team. We quantify the variability of each star in our sample using the ratio of the standard deviation of the original light curve ({sigma}{sub orig.}) to the standard deviation of a light curve that has been smoothed by 9 or 1001 epochs ({sigma}{sub 9} and {sigma}{sub 1001}, respectively). Known Taurus members typically demonstrate ({sigma}{sub orig.}/{sigma}{sub 9}) < 2.0, and ({sigma}{sub orig.}/{sigma}{sub 1001}) < 5, while field stars reveal ({sigma}{sub orig.}/{sigma}{sub 9}) {approx} 3.0 and ({sigma}{sub orig.}/{sigma}{sub 1001}) {approx} 10, as expected for light curves dominated by unstructured white noise. Of the 74 Taurus members/candidates with TrES light curves, we detect significant variability in 49 sources. Adapting a quantitative metric originally developed to assess the reliability of transit detections, we measure the amount of red and white noise in each light curve and identify 18 known or candidate Taurus members with highly significant period measurements. These appear to be the first periods measured for four of these sources (HD 282276, CX Tau, FP Tau, TrES J042423+265008), and in two other cases, the first non-aliased periods (LkCa 21 and DK Tau AB). For the remainder, the TrES measurements typically agree very well ({delta}P < 1%) with previously reported values. Including periods measured at lower confidence for 15 additional sources, we report periods for 11 objects where no previous periods were found, including 8 confirmed Taurus members. We also identify 10 of the 26 candidate Taurus members that demonstrate variability levels consistent with being bona fide T Tauri stars. A Kolomgorov-Smirnov (K-S) test confirms that these new periods confirm the distinction between the rotation period distributions of stars with and without circumstellar disks, with only a 10% probability of the two populations sharing the same parent period distribution. K-S tests do suggest, however, that the updated Taurus period distribution now more closely resembles those measured in other young star-forming clusters (i.e., NGC 2264, NGC 6530, and the ONC). This improved agreement may reflect the exclusion of long rotation periods which are detected in Taurus at lower significance, and which may be beyond the limits of detectability in more distant star-forming regions.

  6. Analysis of Halogen-Mercury Reactions in Flue Gas

    SciTech Connect (OSTI)

    Paula Buitrago; Geoffrey Silcox; Constance Senior; Brydger Van Otten

    2010-01-01

    Oxidized mercury species may be formed in combustion systems through gas-phase reactions between elemental mercury and halogens, such as chorine or bromine. This study examines how bromine species affect mercury oxidation in the gas phase and examines the effects of mixtures of bromine and chlorine on extents of oxidation. Experiments were conducted in a bench-scale, laminar flow, methane-fired (300 W), quartz-lined reactor in which gas composition (HCl, HBr, NO{sub x}, SO{sub 2}) and temperature profile were varied. In the experiments, the post-combustion gases were quenched from flame temperatures to about 350 C, and then speciated mercury was measured using a wet conditioning system and continuous emissions monitor (CEM). Supporting kinetic calculations were performed and compared with measured levels of oxidation. A significant portion of this report is devoted to sample conditioning as part of the mercury analysis system. In combustion systems with significant amounts of Br{sub 2} in the flue gas, the impinger solutions used to speciate mercury may be biased and care must be taken in interpreting mercury oxidation results. The stannous chloride solution used in the CEM conditioning system to convert all mercury to total mercury did not provide complete conversion of oxidized mercury to elemental, when bromine was added to the combustion system, resulting in a low bias for the total mercury measurement. The use of a hydroxylamine hydrochloride and sodium hydroxide solution instead of stannous chloride showed a significant improvement in the measurement of total mercury. Bromine was shown to be much more effective in the post-flame, homogeneous oxidation of mercury than chlorine, on an equivalent molar basis. Addition of NO to the flame (up to 400 ppmv) had no impact on mercury oxidation by chlorine or bromine. Addition of SO{sub 2} had no effect on mercury oxidation by chlorine at SO{sub 2} concentrations below about 400 ppmv; some increase in mercury oxidation was observed at SO{sub 2} concentrations of 400 ppmv and higher. In contrast, SO{sub 2} concentrations as low as 50 ppmv significantly reduced mercury oxidation by bromine, this reduction could be due to both gas and liquid phase interactions between SO{sub 2} and oxidized mercury species. The simultaneous presence of chlorine and bromine in the flue gas resulted in a slight increase in mercury oxidation above that obtained with bromine alone, the extent of the observed increase is proportional to the chlorine concentration. The results of this study can be used to understand the relative importance of gas-phase mercury oxidation by bromine and chlorine in combustion systems. Two temperature profiles were tested: a low quench (210 K/s) and a high quench (440 K/s). For chlorine the effects of quench rate were slight and hard to characterize with confidence. Oxidation with bromine proved sensitive to quench rate with significantly more oxidation at the lower rate. The data generated in this program are the first homogeneous laboratory-scale data on bromine-induced oxidation of mercury in a combustion system. Five Hg-Cl and three Hg-Br mechanisms, some published and others under development, were evaluated and compared to the new data. The Hg-halogen mechanisms were combined with submechanisms from Reaction Engineering International for NO{sub x}, SO{sub x}, and hydrocarbons. The homogeneous kinetics under-predicted the levels of mercury oxidation observed in full-scale systems. This shortcoming can be corrected by including heterogeneous kinetics in the model calculations.

  7. To study of different level of nitrogen manure and density on yield and yield component of variety of K.S.C 704 in dry region of sistan

    SciTech Connect (OSTI)

    Dahmardeh, M.; Forghani, F.; Khammari, E. [Department of Agronomy, Plant breeding and genetic, Faculty of Agricutlure, Zabol University (Iran, Islamic Republic of)

    2008-01-30

    Out of three grain of the world, Corn is one of the best, About 7 to 10 thousand years ago in south of Mexico corn become domesticated. In the year 1995 culfivation of corn in the world was 130 mil/ha, and to Total production of the world of corn is 507 M/Tons. Average yield of corn in the year 1995 Among Producer countries was 7.78 To 7.60 t/ha in fance and united state was state was 2.36 To 2.20 t/ha, but in Brazil and Mexico Production of corn was different. With this regards, special manner has been arranged for the suitable cultivation or suitable density plants in one heactar on cultivation variety of K.S.C 704 corn. Also suitable level of Nitrogen manure, this Protect in climatic condition of Sistan region done, sith complete block design with 3 replication. Experiment has been selected as split plot, the main plot with 4 different concentration level such as (200-250-3500 and 350 Kg/ha) and sub plot density with 3 different level such as 111000,83000 and 66000 plan/ha respectively. From stage growth up to harvesting of corn in this reache having Data for each treat. ment, After harvesting Analysis of variance and companion of Average of each treatment has been done by DunKan method. Results has been shown, Measurment of characteristics (yield component) seed yield effected different density level of manure, with increasing of manure weight of one thousand seed yield and also in high density showed high significant differente amoung each other. These are with suitable climatic condition of sistan region if enough water will be available ed using Amount of 350 ks/ha Nitrogen manure and with density 111000 plants/ha we can product suitable seed yield Biological yield.

  8. Metallic glass alloys of Zr, Ti, Cu and Ni

    DOE Patents [OSTI]

    Lin, X.; Peker, A.; Johnson, W.L.

    1997-04-08

    At least quaternary alloys form metallic glass upon cooling below the glass transition temperature at a rate less than 10{sup 3} K/s. Such alloys comprise titanium from 19 to 41 atomic percent, an early transition metal (ETM) from 4 to 21 atomic percent and copper plus a late transition metal (LTM) from 49 to 64 atomic percent. The ETM comprises zirconium and/or hafnium. The LTM comprises cobalt and/or nickel. The composition is further constrained such that the product of the copper plus LTM times the atomic proportion of LTM relative to the copper is from 2 to 14. The atomic percentage of ETM is less than 10 when the atomic percentage of titanium is as high as 41, and may be as large as 21 when the atomic percentage of titanium is as low as 24. Furthermore, when the total of copper and LTM are low, the amount of LTM present must be further limited. Another group of glass forming alloys has the formula (ETM{sub 1{minus}x}Ti{sub x}){sub a} Cu{sub b} (Ni{sub 1{minus}y}Co{sub y}){sub c} wherein x is from 0.1 to 0.3, y{center_dot}c is from 0 to 18, a is from 47 to 67, b is from 8 to 42, and c is from 4 to 37. This definition of the alloys has additional constraints on the range of copper content, b. 2 figs.

  9. The Effects of Oxy-firing Conditions on Gas-phase Mercury Oxidation by Chlorine and Bromine

    SciTech Connect (OSTI)

    Buitrago, Paula; Silcox, Geoffrey

    2010-06-30

    Bench-scale experiments were conducted in a quartz-lined, natural gas-fired reactor with the combustion air replaced with a blend of 27 mole percent oxygen, with the balance carbon dioxide. Quench rates of 210 and 440 K/s were tested. In the absence of sulfur dioxide, the oxy-firing environment caused a remarkable increase in oxidation of mercury by chlorine. At 400 ppm chlorine (as HCl equivalent), air-firing results in roughly 5 percent oxidation. At the same conditions with oxy-firing, oxidation levels are roughly 80 percent. Oxidation levels with bromine at 25 and 50 ppm (as HBr equivalent) ranged from 80 to 95 percent and were roughly the same for oxy- and air-firing conditions. Kinetic calculations of levels of oxidation at air- and oxy-conditions captured the essential features of the experimental results but have not revealed a mechanistic basis for the oxidative benefits of oxy-firing conditions. Mixtures of 25 ppm bromine and 100 and 400 ppm chlorine gave more than 90 percent oxidation. At all conditions, the effects of quench rate were not significant. The presence of 500 ppm SO2 caused a dramatic decline in the levels of oxidation at all oxy-fired conditions examined. This effect suggests that SO2 may be preventing oxidation in the gas phase or preventing oxidation in the wetconditioning system that was used in quantifying oxidized and elemental mercury concentrations. Similar effects of SO2 have been noted with air-firing. The addition of sodium thiosulfate to the hydroxide impingers that are part of wet conditioning systems may prevent liquid-phase oxidation from occurring.

  10. High-resolution X-ray spectroscopy of Theta Car

    E-Print Network [OSTI]

    Yael Naze; Gregor Rauw

    2008-08-25

    Context : The peculiar hot star Theta Car in the open cluster IC2602 is a blue straggler as well as a single-line binary of short period (2.2d). Aims : Its high-energy properties are not well known, though X-rays can provide useful constraints on the energetic processes at work in binaries as well as in peculiar, single objects. Methods : We present the analysis of a 50ks exposure taken with the XMM-Newton observatory. It provides medium as well as high-resolution spectroscopy. Results : Our high-resolution spectroscopy analysis reveals a very soft spectrum with multiple temperature components (1--6MK) and an X-ray flux slightly below the `canonical' value (log[L_X(0.1-10.)/L_{BOL}] ~ -7). The X-ray lines appear surprisingly narrow and unshifted, reminiscent of those of beta Cru and tau Sco. Their relative intensities confirm the anomalous abundances detected in the optical domain (C strongly depleted, N strongly enriched, O slightly depleted). In addition, the X-ray data favor a slight depletion in neon and iron, but they are less conclusive for the magnesium abundance (solar-like?). While no significant changes occur during the XMM-Newton observation, variability in the X-ray domain is detected on the long-term range. The formation radius of the X-ray emission is loosely constrained to <5 R_sol, which allows for a range of models (wind-shock, corona, magnetic confinement,...) though not all of them can be reconciled with the softness of the spectrum and the narrowness of the lines.

  11. Diffuse X-ray Emission in a Deep Chandra Image of the Galactic Center

    E-Print Network [OSTI]

    M. P. Muno; F. K. Baganoff; M. W. Bautz; E. D. Feigelson; G. P. Garmire; M. R. Morris; S. Park; G. R. Ricker; L. K. Townsley

    2004-06-01

    We examine the spectrum of diffuse emission detected in the 17' by 17' field around Sgr A* during 625 ks of Chandra observations. The spectrum exhibits He-like and H-like lines from Si, S, Ar, Ca, and Fe, that are consistent with originating in a two-temperature plasma, as well as a prominent low-ionization Fe line. The cooler, kT=0.8 keV plasma differs in surface brightness across the image by a factor of 9. This soft plasma is probably heated by supernovae. The radiative cooling rate of the plasma within the inner 20 pc of the Galaxy could be balanced by 1% of the kinetic energy of one supernova every 300,000 y. The hotter, kT=8 keV component is more spatially uniform, ranging over a factor of 2 in surface brightness. The intensity of the hard plasma is correlated with that of the soft, but they are probably only indirectly related, because supernova remnants are not observed to produce thermal plasma hotter than kT=3 keV. Moreover, a kT=8 keV plasma is too hot to be bound to the Galactic center, and therefore would form a slow wind or fountain of plasma. The energy required to sustain such a freely-expanding plasma within the inner 20 pc of the Galaxy is ~10^40 erg/s, which corresponds to the entire kinetic energy of one supernova every 3000 y. This rate is unreasonably high. However, alternative explanations for the kT=8 keV diffuse emission are equally unsatisfying. We are left to conclude that either the diffuse emission is heated by an unanticipated source of energy, or that a population of faint (< 10^31 erg/s), hard X-ray sources that are a factor of 10 more numerous than CVs remains to be discovered. (Abridged)

  12. A Deep Chandra Catalog of X-ray Point Sources toward the Galactic Center

    E-Print Network [OSTI]

    M. P. Muno; F. K. Baganoff; M. W. Bautz; W. N. Brandt; P. S. Broos; E. D. Feigelson; G. P. Garmire; M. R. Morris; G. R. Ricker; L. K. Townsley

    2003-07-09

    (abridged) We present a catalog of 2357 point sources detected during 590 ks of Chandra observations of the 17-by-17 arcminute field around Sgr A*. This field encompasses a physical area of 40 by 40 pc at a distance of 8 kpc. The completeness limit of the sample at the Galactic center is 10^{31} erg s^{-1} (2.0--8.0 keV), while the detection limit is an order of magnitude lower. The 281 sources detected below 1.5 keV are mainly in the foreground of the Galactic center, while comparisons to the Chandra deep fields at high Galactic latitudes suggest that only about 100 of the observed sources are background AGN. The surface density of absorbed sources (not detected below 1.5 keV) falls off as 1/theta away from Sgr A*, in agreement with the distribution of stars in infrared surveys. Point sources brighter than our completeness limit produce 10% of the flux previously attributed to diffuse emission. The log(N)-log(S) distribution of the Galactic center sources is extremely steep (power-law slope alpha = 1.7). If this distribution extends down to a flux of 10^{-17} erg cm^{-1} s^{-1} (10^{29} erg s^{-1} at 8 kpc, 2.0--8.0 keV) with the same slope, then point sources would account for all of the previously reported diffuse emission. Therefore, the 2.0--8.0 keV luminosity distribution must flatten between 10^{29} - 10^{31} erg s^{-1}. Finally, the spectra of more than half of the Galactic center sources are very hard, and can be described by a power law ($E^{-Gamma}) with photon index Gamma < 1. Such hard spectra have been seen previously only from magnetically accreting white dwarfs and wind-accreting neutron stars, suggesting that there are large numbers of these systems in our field.

  13. An XMM-Newton Observation of Abell 2597

    E-Print Network [OSTI]

    R. Glenn Morris; A. C. Fabian

    2005-01-17

    We report on a 120 ks XMM-Newton observation of the galaxy cluster Abell 2597. Results from both the European Photon Imaging Camera (EPIC) and the Reflection Grating Spectrometer (RGS) are presented. From EPIC we obtain radial profiles of temperature, density and abundance, and use these to derive cooling time and entropy. We illustrate corrections to these profiles for projection and point spread function (PSF) effects. At the spatial resolution available to XMM-Newton, the temperature declines by around a factor of two in the central 150 kpc or so in radius, and the abundance increases from about one-fifth to over one-half solar. The cooling time is less than 10 Gyr inside a radius of 130 kpc. EPIC fits to the central region are consistent with a cooling flow of around 100 solar masses per year. Broad-band fits to the RGS spectra extracted from the central 2 arcmin are also consistent with a cooling flow of the same magnitude; with a preferred low-temperature cut-off of essentially zero. The data appear to suggest (albeit at low significance levels below formal detection limits) the presence of the important thermometer lines from Fe XVII at 15, 17 Angstrom rest wavelength, characteristic of gas at temperatures ~ 0.3 keV. The measured flux in each line is converted to a mass deposition estimate by comparison with a classical cooling flow model, and once again values at the level of 100 solar masses per year are obtained. These mass deposition rates, whilst lower than those of previous generations of X-ray observatories, are consistent with those obtained from UV data for this object. This raises the possibility of a classical cooling flow, at the level of around 100 solar masses per year, cooling from 4 keV by more than two orders of magnitude in temperature.

  14. Q2122-444: A NAKED ACTIVE GALACTIC NUCLEUS FULLY DRESSED

    SciTech Connect (OSTI)

    Gliozzi, M.; Satyapal, S.; Panessa, F.; Franca, F. La; Saviane, I.; Monaco, L.; Foschini, L.; Kedziora-Chudczer, L.; Sambruna, R. M.

    2010-12-20

    Based on previous spectral and temporal optical studies, Q2122-444 has been classified as a naked active galactic nucleus (AGN) or true type 2 AGN, that is, an AGN that genuinely lacks a broad-line region (BLR). Its optical spectrum seemed to possess only narrow forbidden emission lines that are typical of type 2 (obscured) AGNs, but the long-term optical light curve, obtained from a monitoring campaign over more than two decades, showed strong variability, apparently ruling out the presence of heavy obscuration. Here we present the results from a {approx}40 ks XMM-Newton observation of Q2122-444 carried out to shed light on the energetics of this enigmatic AGN. The X-ray analysis was complemented with Australia Telescope Compact Array radio data to assess the possible presence of a jet, and with new NTT/EFOSC2 optical spectroscopic data to verify the actual absence of a BLR. The higher-quality optical data revealed the presence of strong and broad Balmer lines that are at odds with the previous spectral classification of this AGN. The lack of detection of radio emission rules out the presence of a jet. The X-ray data combined with simultaneous UV observations carried out by the Optical Monitor (OM) aboard XMM-Newton confirm that Q2122-444 is a typical type 1 AGN without any significant intrinsic absorption. New estimates of the black hole mass independently obtained from the broad Balmer lines and from a new scaling technique based on X-ray spectral data suggest that Q2122-444 is accreting at a relatively high rate in Eddington units.

  15. GRB 050911: a black hole - neutron star merger or a naked GRB

    E-Print Network [OSTI]

    K. L. Page; A. R. King; A. J. Levan; P. T. O'Brien; J. P Osborne; S. D. Barthelmy; A. P. Beardmore; D. N. Burrows; S. Campana; N. Gehrels; J. Graham; M. R. Goad; O. Godet; Y. Kaneko; J. A. Kennea; C. B. Markwardt; D. E. Reichart; T. Sakamoto; N. R. Tanvir

    2005-12-14

    GRB 050911, discovered by the Swift Burst Alert Telescope, was not seen 4.6 hr later by the Swift X-ray Telescope, making it one of the very few X-ray non-detections of a Gamma-Ray Burst (GRB) afterglow at early times. The gamma-ray light-curve shows at least three peaks, the first two of which (~T_0 - 0.8 and T_0 + 0.2 s, where T_0 is the trigger time) were short, each lasting 0.5 s. This was followed by later emission 10-20 s post-burst. The upper limit on the unabsorbed X-ray flux was 1.7 x 10^-14 erg cm^-2 s^-1 (integrating 46 ks of data taken between 11 and 18 September), indicating that the decay must have been rapid. All but one of the long bursts detected by Swift were above this limit at ~4.6 hr, whereas the afterglows of short bursts became undetectable more rapidly. Deep observations with Gemini also revealed no optical afterglow 12 hr after the burst, down to r=24.0 (5-sigma limit). We speculate that GRB 050911 may have been formed through a compact object (black hole-neutron star) merger, with the later outbursts due to a longer disc lifetime linked to a large mass ratio between the merging objects. Alternatively, the burst may have occured in a low density environment, leading to a weak, or non-existent, forward shock - the so-called 'naked GRB' model.

  16. DEEP X-RAY OBSERVATIONS OF THE YOUNG HIGH-MAGNETIC-FIELD RADIO PULSAR J1119-6127 AND SUPERNOVA REMNANT G292.2-0.5

    SciTech Connect (OSTI)

    Ng, C.-Y.; Kaspi, V. M. [Department of Physics, McGill University, Montreal, QC H3A 2T8 (Canada); Ho, W. C. G. [School of Mathematics, University of Southampton, Southampton SO17 1BJ (United Kingdom); Weltevrede, P. [Jodrell Bank Centre for Astrophysics, University of Manchester, Alan Turing Building, Manchester M13 9PL (United Kingdom); Bogdanov, S. [Columbia Astrophysics Laboratory, Columbia University, 550 West 120th Street, New York, NY 10027 (United States); Shannon, R. [CSIRO Astronomy and Space Sciences, Australia Telescope National Facility, Marsfield, NSW 2210 (Australia); Gonzalez, M. E., E-mail: ncy@physics.mcgill.ca [Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1 (Canada)

    2012-12-10

    High-magnetic-field radio pulsars are important transition objects for understanding the connection between magnetars and conventional radio pulsars. We present a detailed study of the young radio pulsar J1119-6127, which has a characteristic age of 1900 yr and a spin-down-inferred magnetic field of 4.1 Multiplication-Sign 10{sup 13} G, and its associated supernova remnant G292.2-0.5, using deep XMM-Newton and Chandra X-ray Observatory exposures of over 120 ks from each telescope. The pulsar emission shows strong modulation below 2.5 keV with a single-peaked profile and a large pulsed fraction of 0.48 {+-} 0.12. Employing a magnetic, partially ionized hydrogen atmosphere model, we find that the observed pulse profile can be produced by a single hot spot of temperature 0.13 keV covering about one-third of the stellar surface, and we place an upper limit of 0.08 keV for an antipodal hot spot with the same area. The non-uniform surface temperature distribution could be the result of anisotropic heat conduction under a strong magnetic field, and a single-peaked profile seems common among high-B radio pulsars. For the associated remnant G292.2-0.5, its large diameter could be attributed to fast expansion in a low-density wind cavity, likely formed by a Wolf-Rayet progenitor, similar to two other high-B radio pulsars.

  17. Establishment of a Graduate Certificate Program in Biobased Industrial Products – Final Technical Report

    SciTech Connect (OSTI)

    John R. Schlup

    2005-11-04

    A certificate of graduate studies in Biobased Industrial Products is to be established at Kansas State University (KSU) along with the development of a similar program at Pittsburg State University, Pittsburg, KS. At KSU, the program of study will be coordinated through the steering committee of the Agricultural Products Utilization Forum (APUF); the certificate of graduate studies will be awarded through the Graduate School of Kansas State University. This certificate will establish an interdisciplinary program of study that will: (1) ensure participating students receive a broad education in several disciplines related to Biobased Industrial Products, (2) provide a documented course of study for students preferring a freestanding certificate program, and (3) provide a paradigm shift in student awareness away from petroleum-based feedstocks to the utilization of renewable resources for fuels and chemical feedstocks. The academic program described herein will accomplish this goal by: (1) providing exposure to several academic disciplines key to Biobased Industrial Products; (2) improving university/industry collaboration through an external advisory board, distance learning opportunities, and student internships; (3) expanding the disciplines represented on the students' supervisory committee; (4) establishing a seminar series on Biobased Industrial Products that draws upon expert speakers representing several disciplines; and (5) increasing collaboration between disciplines. Numerous research programs emphasizing Biobased Industrial Products currently exist at KSU and PSU. The certificate of graduate studies, the emphasis on interdisciplinary collaboration within the students? thesis research, the proposed seminar series, and formation of an industrial advisory board will: (1) provide an interdisciplinary academic experience that spans several departments, four colleges, four research centers, and two universities; (2) tangibly promote collaboration between KSU and PSU; (3) catalyze involvement of plant geneticists with researchers active in the development and utilization of biobased industrial products; and, (4) promote university/industry collaboration.

  18. Suzaku X-ray Observations of the Fermi Bubbles: Northernmost Cap and Southeast Claw Discovered with MAXI-SSC

    E-Print Network [OSTI]

    M. Tahara; J. Kataoka; Y. Takeuchi; T. Totani; Y. Sofue; J. S. Hiraga; H. Tsunemi; Y. Inoue; M. Kimura; C. C. Cheung; S. Nakashima

    2015-02-04

    We report on Suzaku observations of large-scale X-ray structures possibly related with the Fermi Bubbles obtained in 2013 with a total duration of ~ 80 ks. The observed regions were the: (i) northern cap (N-cap; l ~ 0 deg, 45 deg map recently provided by MAXI-SSC and (ii) southeast claw (SE-claw; l ~ 10 deg, -20 deg map and MAXI-SSC Low-band (0.7-1.7 keV) map. In each region, we detected diffuse X-ray emissions which are represented by a three component plasma model consisting of an unabsorbed thermal component (kT ~ 0.1 keV) from the Local Bubble, absorbed kT = 0.30+/-0.05 keV emission representing the Galactic Halo, and a power-law component due to the isotropic cosmic X-ray background radiation. The emission measure of the GH component in the SE-claw shows an excess by a factor of ~ 2.5 over the surrounding emission at 2 deg away. We also found a broad excess in the 1.7-4.0 keV count rates across the N-cap after compiling other archival data from Suzaku and Swift. The spectral stacking analysis of the N-cap data indicates the presence of another thermal component with kT = 0.70 (+0.22,-0.11) keV. The temperature of kT ~ 0.3 keV of the Galactic Halo is higher than the ubiquitous value of kT ~ 0.2 keV near the Fermi Bubbles, and can be even higher (~ 0.7 keV). We discuss our findings in the context of bubble-halo interaction.

  19. The Youngest Galactic Supernova Remnant: G1.9+0.3

    E-Print Network [OSTI]

    S. P. Reynolds; K. J. Borkowski; D. A. Green; U. Hwang; I. Harrus; R. Petre

    2008-04-23

    Our 50 ks Chandra observation of the small radio supernova remnant (SNR) G1.9+0.3 shows a complete shell structure with strong bilateral symmetry, about $100''$ in diameter. The radio morphology is also shell-like, but only about $84''$ in diameter, based on observations made in 1985. We attribute the size difference to expansion between 1985 and our Chandra observations of 2007. Expansion is confirmed in comparing radio images from 1985 and 2008. We deduce that G1.9+0.3 is of order 100 years old -- the youngest supernova remnant in the Galaxy. Based on a very high absorbing column density of $5.5 \\times 10^{22}$ cm$^{-2}$, we place G1.9+0.3 near the Galactic Center, at a distance of about 8.5 kpc, where the mean remnant radius would be about 2 pc, and the required expansion speed about $14,000$ km s$^{-1}$. The X-ray spectrum is featureless and well-described by the exponentially cut off synchrotron model {\\tt srcut}. With the radio flux at 1 GHz fixed at 0.9 Jy, we find a spectral index of 0.65 and a rolloff frequency of $1.4 \\times 10^{18}$ Hz. The implied characteristic rolloff electron energy of about $94 (B/10 \\mu{\\rm G})^{-1/2}$ TeV is the highest ever reported for a shell supernova remnant. It can easily be reached by standard diffusive shock acceleration, given the very high shock velocities; it can be well described by either age-limited or synchrotron-loss-limited acceleration. Not only is G1.9+0.3 the youngest known Galactic remnant, it is also only the fourth Galactic X-ray synchrotron-dominated shell supernova remnant.

  20. NGC 1365: A low column density state unveiling a low ionization disk wind

    SciTech Connect (OSTI)

    Braito, V.; Reeves, J. N.; Gofford, J.; Nardini, E.; Porquet, D.; Risaliti, G.

    2014-11-01

    We present the time-resolved spectral analysis of the XMM-Newton data of NGC 1365 collected during one XMM-Newton observation, which caught this 'changing-look' active galactic nucleus in a high flux state characterized also by a low column density (N {sub H} ? 10{sup 22} cm{sup –2}) of the X-ray absorber. During this observation, the low-energy photoelectric cut-off is at about ?1 keV and the primary continuum can be investigated with the XMM-Newton-RGS data, which show strong spectral variability that can be explained as a variable low N {sub H} that decreased from N {sub H} ? 10{sup 23} cm{sup –2} to 10{sup 22} cm{sup –2} in a 100 ks timescale. The spectral analysis of the last segment of the observation revealed the presence of several absorption features that can be associated with an ionized (log ? ? 2 erg cm s{sup –1}) outflowing wind (v {sub out} ? 2000 km s{sup –1}). We detected for the first time a possible P-Cygni profile of the Mg XII Ly? line associated with this mildly ionized absorber indicative of a wide angle outflowing wind. We suggest that this wind is a low ionization zone of the highly ionized wind present in NGC 1365, which is responsible for the iron K absorption lines and is located within the variable X-ray absorber. At the end of the observation, we detected a strong absorption line at E ? 0.76 keV most likely associated with a lower ionization zone of the absorber (log ? ? 0.2 erg cm s{sup –1}, N {sub H} ? 10{sup 22} cm{sup –2}), which suggests that the variable absorber in NGC 1365 could be a low ionization zone of the disk wind.