Browsing Ohio State University Research and Scholarship by Title
Now showing results 481-500 of 833
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N=1 super Yang-Mills theory on a (3 + 1) dimensional transverse lattice with one exact supersymmetry
Harada, Motomichi; Pinsky, Stephen ( 2005-03-24 )We formulate N=1 super Yang-Mills theory in 3 + 1 dimensions on a two dimensional transverse lattice using supersymmetric discrete light-cone quantization in the large-N_c limit. This formulation is free of fermion species ... -
Nano-Structured Ceramics by Gas-Phase Reaction
Carney, Carmen; Akbar, Sheikh ( 2006 )Single-crystalline nanofibers of tin dioxide (SnO_2) were synthesized by a gas-phase reaction of solid SnO2 sintered disks in a reducing atmosphere between 700 and 800 °C. The resulting nanostructures grew on regions of ... -
Nanomechanical-resonator-induced synchronization in Josephson junction arrays
Trees, B. R.; Natu, S.; Stroud, D. ( 2005-12-30 )We show that a serial array of N nonuniform, underdamped Josephson junctions coupled piezoelectrically to a nanoelectromechanical (NEM) oscillator results in phase locking of the junctions. Our approach is based on a ... -
Nanometer-resolution measurement and modeling of lateral variations of the effective work function at the bilayer Pt/Al/SiO_2 interface
Cai, W.; Park, K.-B.; Pelz, J. P. ( 2009-10-19 )A ballistic electron emission microscopy (BEEM) comparison of the dependence on gate voltage of the average energy barrier of a metal bilayer Pt/Al/SiO_2/Si sample and a Pt/SiO_2/Si sample suggests that the metal/oxide ... -
The Narrow-Line Regions of LINERs as Resolved with the Hubble Space Telescope
Pogge, Richard W.; Maoz, Dan; Ho, Luis C.; Eracleous, Michael ( 2000-03-20 )Low-ionization nuclear emission-line regions (LINERs) exist in the nuclei of a large fraction of luminous galaxies, but their connection with the active galactic nucleus (AGN) phenomenon has remained elusive. We present ... -
A Natural Formalism for Microlensing
Gould, Andrew ( 2000-10-20 )If the standard microlensing geometry is inverted so that the Einstein ring is projected onto the observer plane rather than the source plane, then the relations between the observables (θ_E,r_E) and the underlying physical ... -
Natural units for nuclear energy density functional theory
Kortelainen, M.; Furnstahl, R. J.; Nazarewicz, W.; Stoitsov, M. V. ( 2010-07-30 )Naive dimensional analysis based on chiral effective theory, when adapted to nuclear energy density functionals, prescribes natural units and a hierarchy of contributions that could be used to constrain fits of generalized ... -
The nature and economy of the space-place distinction
Wainwright, Joel; Trevor, Barnes J. ( 2009-07-17 )This paper reconsiders the distinction between the concepts of space and place. We argue that, rather than favoring one side of the place - space division, or dissolving the partition between them, the distinction needs ... -
NCX-4040, a nitric oxide-releasing aspirin, sensitizes drug-resistant human ovarian xenograft tumors to cisplatin by depletion of cellular thiols
Bratasz, Anna; Selvendiran, Karuppaiyah; Wasowicz, Tomasz; Bobko, Andrey; Khramtsov, Valery V.; Ignarro, Louis J.; Kuppusamy, Periannan ( 2008-02-26 )Background: Ovarian carcinoma is the leading cause of mortality among gynecological cancers in the world. The high mortality rate is associated with lack of early diagnosis and development of drug resistance. The ... -
Near-Infrared Constraints on the Presence of Warm Dust at Metal-Rich, Helium Atmosphere White Dwarfs
Kilic, Mukremin; Farihi, J.; Nitta, Atsuko; Leggett, S. K. ( 2008-06-03 )We present near-infrared spectroscopic observations of 15 helium atmosphere, metal-rich white dwarfs obtained at the NASA Infrared Telescope Facility. While a connection has been demonstrated between the most highly polluted, ... -
Near-Infrared Spectroscopy of Molecular Filaments in the Reflection Nebula NGC 7023
Martini, Paul; Sellgren, K.; Hora, Joseph L. ( 1997-07-20 )We present near-infrared spectroscopy of fluorescent molecular hydrogen (H_2) emission from molecular filaments in the reflection nebula NGC 7023. We derive the relative column densities of H_2 rotational-vibrational states ... -
Near-Infrared Spectroscopy of Molecular Hydrogen Emission in Four Reflection Nebulae: NGC 1333, NGC 2023, NGC 2068, and NGC 7023
Martini, Paul; Sellgren, K.; DePoy, D. L. ( 1999-12-01 )This paper presents near-infrared spectroscopy of fluorescent molecular hydrogen (H2) emission from NGC 1333, NGC 2023, NGC 2068, and NGC 7023 and derives the physical properties of the molecular material in these reflection ... -
Nest predation in an urbanizing landscape: the role of exotic shrubs
Borgmann, Kathi L.; Rodewald, Amanda D. ( 2004-12 )Nest predation is considered a primary force shaping avian communities, and landscape-scale features (e.g., amount of fragmentation) are generally recognized as factors mediating nest predation. These same landscape-scale ... -
Neurochemical correlates of autistic disorder: A review of the literature
Lam, Kristen S.L.; Aman, Michael G.; Arnold, L. Eugene ( 2006 )Review of neurochemical investigations in autistic disorder revealed that a wide array of transmitter systems have been studied, including serotonin, dopamine, norepinephrine, acetylcholine, oxytocin, endogenous opioids, ... -
Neutrino background flux from sources of ultrahigh-energy cosmic-ray nuclei
Murase, Kohta; Beacom, John F. ( 2010-06-01 )Motivated by Pierre Auger Observatory results favoring a heavy nuclear composition for ultrahigh-energy (UHE) cosmic rays, we investigate implications for the cumulative neutrino background. The requirement that nuclei not ... -
A New Approach for the Study of Chemical Mechanical Polishing
Devecchio, D.; Schmutz, P.; Frankel, G. S. ( 1999-12-16 )The process of chemical mechanical polishing (CMP) can be studied using in situ atomic force microscopy (AFM) by intentionally using a high tip/sample interaction force. The nominal removal rate ofAl during AFM scratching ... -
A New Approach to Astrophysical Spectra: The Complete Experimental Spectrum of Ethyl Cyanide (CH_3CH_2CN) between 570 and 645 GHz
Fortman, Sarah M.; Medvedev, Ivan R.; Neese, Christopher F.; De Lucia, Frank C. ( 2010-05-01 )There is a general consensus that many of the unidentified features in astrophysical spectra are due to low lying excited vibrational and torsional states of a few molecules—commonly referred to as the astrophysical weeds. ... -
A New Argument against an Intervening Stellar Population toward the Large Magellanic Cloud
Gould, Andrew ( 1999-11-10 )Zaritsky & Lin have claimed detection of an intervening population of stars toward the Large Magellanic Cloud (LMC), which, they believe, could account for a substantial fraction of the observed microlensing events. I show ... -
A New Class of Luminous Transients and a First Census of Their Massive Stellar Progenitors
Thompson, Todd A.; Prieto, José L.; Stanek, K. Z.; Kistler, Matthew D.; Beacom, John F.; Kochanek, Christopher S. ( 2009-11-10 )The progenitors of SN 2008S and the 2008 luminous transient in NGC 300 were deeply dust-enshrouded massive stars, with extremely red mid-infrared (MIR) colors and relatively low bolometric luminosities (≈5 × 10^4 Lsun). ... -
New Dissociative Recombination Product Branching Fractions and Their Effect on Calculated Interstellar Molecular Abundances
Herbst, Eric; Lee, H.-H. ( 1997-08-20 )Recent storage ring measurements of the complete product distributions for the dissociative recombination of assorted polyatomic ions (H_3^+, H_2O^+, H_3O^+, CH_3^+) show that there is significantly more fragmentation than ...