Now showing items 4-23 of 390

  • Alignment of the CMS tracker with LHC and cosmic ray data 

    CMS Collaboration; Adair, A.; Akgun, B.; Ecklund, K.M.; Geurts, F.J.M.; Li, W.; Michlin, B.; Padley, B.P.; Redjimi, R.; Roberts, J.; Zabel, J. (2014)
    The central component of the CMS detector is the largest silicon tracker ever built. The precise alignment of this complex device is a formidable challenge, and only achievable with a significant extension of the technologies ...
  • All-optical production of a lithium quantum gas using narrow-line laser cooling 

    Duarte, P.M.; Hart, R.A.; Hitchcock, J.M.; Corcovilos, T.A.; Yang, T.-L.; Reed, A.; Hulet, R.G. (2011)
    We have used the narrow 2S1/2→3P3/2 transition in the ultraviolet (uv) to laser cool and magneto-optically trap (MOT) 6Li atoms. Laser cooling of lithium is usually performed on the 2S1/2→2P3/2 (D2) transition, and ...
  • Altered Backbone and Side-Chain Interactions Result in Route Heterogeneity during the Folding of Interleukin-1b (IL-1b) 

    Capraro, Dominique T.; Lammert, Heiko; Heidary, David K.; Roy, Melinda; Gross, Larry A.; Onuchic, José N.; Jennings, Patricia A. (2013-08)
    Deletion of the b-bulge trigger-loop results in both a switch in the preferred folding route, from the functional loop packing folding route to barrel closure, as well as conversion of the agonist activity of IL-1b into ...
  • Analysis of in situ images of Bose-Einstein condensates of lithium 

    Bradley, C.C.; Sackett, C.A.; Hulet, R.G. (1997)
    The initial evidence for Bose-Einstein condensation (BEC) of Li7 consisted of image distortions that suddenly appeared as the gas was evaporatively cooled to near the transition temperature. We present results of a model ...
  • Andreev Reflection of Helical Edge Modes in InAs=GaSb Quantum Spin Hall Insulator 

    Knez, Ivan; Du, Rui-Rui; Sullivan, Gerard (2012-10-31)
    We present an experimental study of S−N−S junctions, with N being a quantum spin Hall insulator made of InAs/GaSb. A front gate is used to vary the Fermi level into the minigap, where helical edge modes exist [Phys. Rev. ...
  • Angle- and energy-resolved, spin-polarized electron emission spectroscopy to study surface magnetic and electronic properties 

    Rau, C.; Waters, K.; Chen, N. (1990)
    We report on a new technique, spin-polarized electron emission spectroscopy. Using grazing-angle, surface scattering of H+ and He+ ions at Ni(110), we find that the angle-resolved energy distribution of emitted spin-polarized ...
  • Are chromospheric nanoflares a primary source of coronal plasma? 

    Klimchuk, J.A.; Bradshaw, S.J. (2014)
    It has been suggested that the hot plasma of the solar corona comes primarily from impulsive heating events, or nanoflares, that occur in the lower atmosphere, either in the upper part of the ordinary chromosphere or at ...
  • Assembly of a Three-Dimensional Multitype Bronchiole Coculture Model Using Magnetic Levitation 

    Tseng, Hubert; Gage, Jacob A.; Raphael, Robert M.; Moore, Robert H.; Killian, Thomas C.; Grande-Allen, K. Jane; Souza, Glauco R. (2013)
    A longstanding goal in biomedical research has been to create organotypic cocultures that faithfully represent native tissue environments. There is presently great interest in representative culture models of the lung, ...
  • The Atlastin C-terminal Tail is an Amphipathic Helix that Perturbs Bilayer Structure during Endoplasmic Reticulum Homotypic Fusion 

    Faust, Joseph E.; Desai, Tanvi; Verma, Avani; Ulengin, Idil; Sun, Tzu-Lin; Moss, Tyler J.; Betancourt, Miguel A.; Huang, Huey W.; Lee, Tina; McNew, James A. (2015)
    Fusion of tubular membranes is required to form three-way junctions found in reticular subdomains of the endoplasmic reticulum (ER). The large GTPase Atlastin has recently been shown to drive ER membrane fusion and three-way ...
  • Benchmark measurements and simulations of dose perturbations due to metallic spheres in proton beams 

    Newhauser, Wayne D.; Rechner, Laura; Mirkovic, Dragan; Yepes, Pablo; Koch, Nicholas C.; Titt, Uwe; Fontenot, Jonas D.; Zhang, Rui (2013)
    Monte Carlo simulations are increasingly used for dose calculations in proton therapy due to its inherent accuracy. However, dosimetric deviations have been found using Monte Carlo code when high density materials are ...
  • Biomedical applications of plasmon resonant metal nanoparticles 

    Liao, Hongwei; Nehl, Colleen L.; Hafner, Jason H. (2006)
  • Biomolecular dynamics: order–disorder transitions and energy landscapes 

    Whitford, Paul C.; Sanbonmatsu, Karissa Y.; Onuchic, José N. (2012)
    While the energy landscape theory of protein folding is now a widely accepted view for understanding how relatively-weak molecular interactions lead to rapid and cooperative protein folding, such a framework must be extended ...
  • Bose-Einstein Condensation of 84Sr 

    Martinez de Escobar, Y.N.; Mickelson, P.G.; Yan, M.; DeSalvo, B.J.; Nagel, S.B.; Killian, T.C. (2009-11-09)
    We report Bose-Einstein condensation of Sr84 in an optical dipole trap. Efficient laser cooling on the narrow intercombination line and an ideal s-wave scattering length allow the creation of large condensates (N0∼3×105) ...
  • Bose-Einstein condensation of 88Sr through sympathetic cooling with 87Sr 

    Mickelson, P.G.; Martinez de Escobar, Y.N.; Yan, M.; DeSalvo, B.J.; Killian, T.C. (2010-05-05)
    We report Bose-Einstein condensation of Sr88, which has a small, negative s-wave scattering length (a88=−2a0). We overcome the poor evaporative cooling characteristics of this isotope by sympathetic cooling with Sr87 atoms. ...
  • Bose-Einstein condensation of lithium 

    Hulet, Randy G.; Bradley, Curtis C.; Sackett, C. A. (1997)
    Bose-Einstein condensation of 7Li has been studied in a magnetically trapped gas. Because of the effectively attractive interactions between 7Li atoms, many-body quantum theory predicts that the occupation number of the ...
  • Bose-Einstein Condensation of Lithium: Observation of Limited Condensate Number 

    Bradley, C.C.; Sackett, C.A.; Hulet, R.G. (1997)
    Bose-Einstein condensation of 7Li has been studied in a magnetically trapped gas. Because of the effectively attractive interactions between 7Li atoms, many-body quantum theory predicts that the occupation number of the ...
  • Bridging quantum and classical plasmonics with a quantum-corrected model 

    Esteban, Ruben; Borisov, Andrei G.; Nordlander, Peter; Aizpurua, Javier (2012)
    Electromagnetic coupling between plasmonic resonances in metallic nanoparticles allows for engineering of the optical response and generation of strong localized near-fields. Classical electrodynamics fails to describe ...
  • Bright matter wave solitons in Bose–Einstein condensates 

    Strecker, K.E.; Partridge, G.B.; Truscott, A.G.; Hulet, R.G. (2003)
    We review recent experimental and theoretical work on the creation of bright matter wave solitons in Bose–Einstein condensates. In two recent experiments, solitons are formed from Bose–Einstein condensates of  7Li by ...
  • Bright Soliton Trains of Trapped Bose-Einstein Condensates 

    Khawaja, U. Al; Stoof, H.T.C.; Hulet, R.G.; Strecker, K.E.; Partridge, G.B. (2002)
    We variationally determine the dynamics of bright soliton trains composed of harmonically trapped Bose-Einstein condensates with attractive interatomic interactions. In particular, we obtain the interaction potential between ...
  • BROADBAND SPECTRAL INVESTIGATIONS OF SGR J1550−5418 BURSTS 

    Lin, Lin; Baring, Matthew G.; Granot, Jonathan; Kouveliotou, Chryssa; Kaneko, Yuki; Van Der Horst, Alexander; Gruber, David; Von Kienlin, Andreas; Younes, George; Watts, Anna L.; Gehrels, Neil (2012)
    We present the results of our broadband spectral analysis of 42 SGR J1550−5418 bursts simultaneously detected with the Swift/X-ray Telescope (XRT) and the Fermi/Gamma-ray Burst Monitor (GBM), during the 2009 January active ...