Browsing Ohio State University Research and Scholarship by Title
Now showing results 389-408 of 833
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Lacandon Maya ecosystem management: sustainable design for subsistence and environmental restoration
Diemont, Stewart A. W.; Martin, Jay F. ( 2009-01 )Indigenous groups have designed and managed their ecosystems for generations, resulting in biodiversity protection while producing for their family's needs. Here we describe the agroecosystem of the Lacandon Maya, an ... -
Large Magellanic Cloud Microlenses: Dark or Luminous?
Gould, Andrew ( 1998-06-01 )Zhao has proposed that the microlensing events observed toward the Large Magellanic Cloud (LMC) could be due to faint stars in a dwarf galaxy or tidal debris lying along the line of sight to the LMC. Zaritsky & Lin claim ... -
Large-scale Breit-Pauli R-matrix Calculations for Transition Probabilities of Fe V
Nahar, Sultana Nurun; Pradhan, Anil K. ( 2000 )Ab initio theoretical calculations are reported for the electric (El) dipole allowed and intercombination fine structure transitions in Fe V using the Breit-Pauli R-matrix (BPRM) method. We obtain 3865 bound fine structure ... -
Latitudinal variations of TEC over Europe obtained from GPS observations
Wielgosz, P.; Baran, L. W.; Shagimuratov, I. I.; Aleshnikova, M. V. ( 2004 )GPS technique has opened broad possibilities to study the TEC distribution on a regular basis. In this paper, the latitudinal dependence of TEC over Europe for geographic latitudes ranging from 40°N to 75°N is presented. ... -
Learning with Missing Data
Koyluoglu, O. Ozan; Ramakrishnan, Naveen ( 2010-02-09 )This work considers the problem of learning with missing data. Two main classes of approaches are considered. The first class consists of sequential algorithms in which the missing values are first imputed by using an ... -
Levoamphetamine and Dextroamphetamine: Differential Effect on Aggression and Hyperkinesis in Children and Dogs
Arnold, L. Eugene; Kirilcuk, Vladimir; Corson, Samuel A.; Corson, Elizabeth O'L. ( 1973 )In laboratory experiments with hyperkinetic, untrainable dogs and in a comparison of levoamphetamine, dextroamphetamine, and placebo in children, levoamphetamine and dextroamphetamine were found to be approximately equal ... -
The Lifetime of FR II Sources in Groups and Clusters: Implications for Radio-Mode Feedback
Bird, Jonathan; Martini, Paul; Kaiser, Christian ( 2008-03-20 )We determine the maximum lifetime t_max of 52 Fanaroff-Riley type II (FR II) radio sources found in 26 central group galaxies from cross-correlation of the Berlind SDSS group catalog with the VLA FIRST survey. Mock catalogs ... -
Light-induced morphological alteration in anthocyanin-accumulating vacuoles of maize cells
Irani, Niloufer G.; Grotewold, Erich ( 2005-05-20 )Background: Plant pigmentation is affected by a variety of factors. Light, an important plant developmental signal, influences the accumulation of anthocyanins primarily through the activation of the transcription factors ... -
Limbic Regression with Derepression of Oedipal Feelings
Arnold, L. Eugene; Selinger, Stanley S.; Koizumi, Hisako ( 1981 )Most knowledge of the normal preschool oedipal feelings for a parent of the opposite sex come from reconstructive analysis of neurologically normal adults or from observation of phallic stage children. We have discovered ... -
Limitation on Prepulse Level for Cone-Guided Fast-Ignition Inertial Confinement Fusion
MacPhee, A. G.; Divol, L.; Kemp, A. J.; Akli, K. U.; Beg, F. N.; Chen, C. D.; Chen, H.; Hey, D. S.; Fedosejevs, R. J.; Freeman, R. R.; Henesian, M.; Key, M. H.; Le Pape, S.; Link, A.; Ma, T.; Mackinnon, A. J.; Ovchinnikov, V. M.; Patel, P. K.; Phillips, T. W.; Stephens, R. B.; Tabak, M.; Town, R.; Tsui, Y. Y.; Van Woerkom, L. D.; Wei, M. S.; Wilks, S. C. ( 2010-02-04 )The viability of fast-ignition (FI) inertial confinement fusion hinges on the efficient transfer of laser energy to the compressed fuel via multi-MeV electrons. Preformed plasma due to the laser prepulse strongly influences ... -
Location and energy of interstitial hydrogen in the 1/1 approximant W-TiZrNi of the icosahedral TiZrNi quasicrystal: Rietveld refinement of x-ray and neutron diffraction data and density-functional calculations
Hennig, R. G.; Majzoub, E. H.; Kelton, K. F. ( 2006-05-25 )We present a determination of hydrogen sites in the 1/1 approximant structure of the icosahedral TiZrNi quasicrystal. A Rietveld refinement of neutron and x-ray diffraction data determines the locations of interstitial ... -
The Locus of Highly Accreting Active Galactic Nuclei on the M_BH-σ Plane: Selections, Limitations, and Implications
Mathur, Smita; Grupe, Dirk ( 2005-11-10 )We reexamine the locus of narrow-line Seyfert 1 galaxies (NLS1s) on the M_BH-σ (black hole mass-bulge velocity dispersion) plane in the light of the results from large new optically selected samples. We find that (1) soft ... -
Long Josephson junction in a resonant cavity
Tornes, I.; Stroud, D. ( 2005-04-11 )We present a model to describe an underdamped long Josephson junction coupled to a single-mode electromagnetic cavity, and carry out numerical calculations using this model in various regimes. The coupling may occur through ... -
Low Energy Supersymmetry from the Heterotic String Landscape
Lebedev, Oleg; Nilles, Hans-Peter; Raby, Stuart; Ramos-Sanchez, Saul; Ratz, Michael; Vaudrevange, Patrick K. S.; Wingerter, Akin ( 2007-05-04 )We study possible correlations between properties of the observable and hidden sectors in heterotic string theory. Specifically, we analyze the case of the ℤ_6-II orbifold compactification which produces a significant ... -
Low-energy fine-structure resonances in photoionization of O II
Nahar, Sultana Nurun; Montenegro, Maximiliano; Eissner, Werner; Pradhan, Anil K. ( 2010-12-20 )Resonant features in low-energy photoionization cross sections are reported in coupled-channel calculations for O II including relativistic fine structure. The calculations reveal extensive near-threshold resonant structures ... -
A Lower Bound on the Cosmic Baryon Density
Weinberg, David H.; Miralda-Escudé, Jordi; Hernquist, Lars; Katz, Neal ( 1997-12-01 )We derive lower bounds on the cosmic baryon density from the requirement that the high-redshift intergalactic medium (IGM) contain enough neutral hydrogen to produce the observed Lyα absorption in quasar spectra. These ... -
The Lowest Mass White Dwarf
Kilic, Mukremin; Prieto, Carlos Allende; Brown, Warren R.; Koester, D. ( 2007-05-10 )Extremely low mass white dwarfs are very rare objects likely formed in compact binary systems. We present MMT optical spectroscopy of 42 low-mass white dwarf candidates serendipitously discovered in a survey for hypervelocity ... -
M Dwarfs from Hubble Space Telescope Star Counts. III. The Groth Strip
Gould, Andrew; Bahcall, John N.; Flynn, Chris ( 1997-06-20 )We analyze the disk M dwarfs found in 31 new fields observed with the Wide Field Camera 2 (WFC2) on the Hubble Space Telescope, together with the sample previously analyzed from 22 WFC2 fields and 162 prerepair Planetary ... -
M Dwarfs from Hubble Space Telescope Star Counts. IV.
Zheng, Zheng; Flynn, Chris; Gould, Andrew; Bahcall, John N.; Salim, Samir ( 2001-07-01 )We study a sample of about 1400 disk M dwarfs that are found in 148 fields observed with the Wide Field Camera 2 (WFC2) on the Hubble Space Telescope and 162 fields observed with pre-repair Planetary Camera 1 (PC1), of ... -
M Dwarfs from Hubble Space Telescope Star Counts. V. The I-Band Luminosity Function
Zheng, Zheng; Flynn, Chris; Gould, Andrew; Bahcall, John N.; Salim, Samir ( 2004-01-20 )We derive the disk I-band luminosity function from the Zheng et al. sample of ~1400 disk M dwarfs observed with the Hubble Space Telescope. We adopt a Galactic-height-dependent color-magnitude relation to account for the ...