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Creator | Title | Description | Subject | Date |
| 251 |
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Clayton, Dale H. | New genus and three new species of chewing lice (Phthiraptera: Philopteridae) from Peruvian ovenbirds (Passeriformes: Furnariidae) | The new genus Furnariphilus is described to include three new species from Peruvian hosts within the passerine family Furnariidae, subfamily Furnariinae: F. pagei, the type species of the genus, from Furnarius leucopus Swainson; F. griffithsi from Sclerurus mexicanus Sclater; and F. parkeri from Scl... | Chewing lice; Peruvian ovenbirds; Phthiraptera; Furnariphilus; Ectoparasites; Peru; Furnarius leucopus; Sclerurus mexicanus; Sclerurus caudacutus | 1995 |
| 252 |
 |
Vardeny, Zeev Valentine | Transient spectroscopy of excitons and polarons in C60 films from femtosecond to milliseconds | We have studied photoexcitations in C60 films using transient photomodulation and photoluminescence from 100 fs to 50 ms and absorption-detected magnetic resonance (ADMR). We show that singlet Frenkel excitons are the primary photoexcitations; their recombination kinetics in the picosecond time dom... | Transient spectroscopy; C60 films; Femtoseconds; Milliseconds | 1994-11 |
| 253 |
 |
Miller, Joel Steven | Dinuclear iron(II) complex, [(TPyA)FeII(THBQ 2-)FeII(TPyA)](BF4)2 [TPyA = tris(2-pyridylmethyl)amine; THBQ2- = 2,3,5,6-tetrahydroxy-1,4- benzoquinonate] exhibiting both spin crossover with hysteresis and ferromagnetic exchange | Dinuclear [(TPyA)FeII(THBQ22)FeII(TPyA)](BF4)2 (1) possesses hydrogen bonding interactions that form a 1-D chain, and p-p interactions between the 1-D chains that give rise to a 2-D supramolecular-layered structure, inducing hysteresis in the spin crossover behavior; 1 has shown spin crossover behav... | Dinuclear complexes | 2008 |
| 254 |
 |
Adler, Frederick R. | How virulent should a parasite be to its vector? | Vector-borne parasites are commonly predicted to be less virulent to the vector than to the definitive host as the parasite gains little by harming its main route of transmission. Here we assess the empirical evidence from systems in which insects are vectors for vertebrate, plant, and invertebrate ... | Parasite virulence; Hosts; Vector-borne parasite | 2003 |
| 255 |
 |
DeTar, Carleton | Heavy-light decay constants - MILC results with the Wilson action | We present the current status of our ongoing calculations of pseudoscalar meson decay constants for mesons that contain one light and one heavy quark (fB, fBs , fD, fDs ). We are currently generating new gauge configurations that include dynamical quarks and calculating the decay constants. In add... | Decay constants; Wilson action; Kogut-Susskind quarks; Staggered quarks; Chiral extrapolation | 1998-01 |
| 256 |
 |
Wu, Yong-Shi | Quantized spin Hall effect in 3He-A and other p-wave paired Fermi systems | In this paper, we propose the quantized spin Hall effect (SHE) in the vortex state of a rotating p-wave paired Fermi system in an inhomogeneous magnetic field and in a weak periodic potential. It is the three-dimensional extension of the spin Hall effect for a 3He-A superfluid film previously stud... | Fermi systems; Spin Hall conductance | 2008-04 |
| 257 |
 |
Mattis, Daniel C.; Sutherland, Bill | Strange solutions to field theories in one spatial dimension | Many models of interacting particles rely heavily for their solution on restriction to one-dimensional motion and a linearized kinetic energy. We examine this in detail, and find that the linearization can lead to patently strange and possible spurious solutions in first quantization. The usual, co... | Eigenstates; Field theories | 1981 |
| 258 |
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Goller, Franz | Low-dimensional dynamical model for the diversity of pressure patterns used in canary song | During song production, oscine birds produce large air sac pressure pulses. During those pulses, energy is transferred to labia located at the juncture between the bronchii and the trachea, inducing the high frequency labial oscillations which are responsible for airflow modulations, i.e., the utt... | Serinus canarias; Air sac pressure | 2009-04 |
| 259 |
 |
Morse, Michael David | ???X??+ band systems of jet-cooled ScCo and YCo | Rotationally resolved resonant two-photon ionization (R2PI) spectra of ScCo and YCo are reported. The measured spectra reveal that these molecules possess ground electronic states of 1?+ symmetry, as previously found in the isoelectronic Cr2 and CrMo molecules. The ground state rotational constant... | | 2010 |
| 260 |
 |
Miller, Joel Steven; Epstein, Arthur J. | Forthcoming attractions | Magnets made from molecules and ions having spins in p orbitals have only been discovered in the past decade. Their solubility in organic solvents and room temperature manufacture means that they should find a variety of applications. | Electron; Temperature; Magnets | 1994 |
| 261 |
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Keller, Robert M. | Denotational models for parallel programs with indeterminate operators | Several approaches to networks of concurrently-operating modules involving indeterminacy are discussed. Techniques for representing the denotational semantics of such networks, and for verifying properties of them, are presented, including an oracle approach, an axiomatic approach, a data-type reduc... | Denotational models; Indeterminate operators | 1977 |
| 262 |
 |
Goller, Franz | Synthesizing bird song | In this work we present an electronic syrinx: an analogical integrator of the equations describing a model for sound production by oscine birds. The model depends on time varying parameters with clear biological interpretation: the air sac pressure and the tension of ventral syringeal muscles. We te... | Syrinx; Tension; Transducer | 2005 |
| 263 |
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Miller, Joel Steven | Two-dimensional molecular-based ferrimamagnets incorporating decamethylmetallocenium cations | Four new molecular-based magnets have been synthesized, and their magnetic properties have been investigated in detail. Their formulae are [M'(C5Me5)2]2M2[Cu(opba)]3.(DMSO)x(H20)y with M' = Fe, M = Mn, x = 5, y = 4 (1), M' = Fe, M = Co, x = 6, y = 4 (2), M' = Co, M = Mn, x = 5.5, y = 4 (3) and M' = ... | Magnetic; Compounds | 1996 |
| 264 |
 |
Adler, Frederick R. | Genetic and phylogenetic consequences of island biogeography | Island biogeography theory predicts that the number of species on an island should increase with island size and decrease with island distance to the mainland. These predictions are generally well supported in comparative and experimental studies. These ecological, equilibrium predictions arise as a... | Extinction; Genetic divergence; Island isolation; Migration; Speciation | 2000 |
| 265 |
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Morse, Michael David | Spectroscopic studies of jet-cooled CuAg | Resonant two-photon ionization spectroscopy has been applied to jet-cooled diatomic CuAg. Four band systems have been observed, three of which have been rotationally resolved and analyzed. The ground state is X ??+ in symmetry, deriving from the 3d??cu4d??Ag?? molecular configuration. Its bond lengt... | | 1991 |
| 266 |
 |
Mattis, Daniel C. | Multicomponent polaron | By a slight modification of the Fröhlich Hamiltonian (the introduction of an internal quantum number) we reduce the polaron problem to the solution of a continued fraction, even at finite temperature. We analyze both the stationary states and the resonances (in one- and three-dimensional versions o... | Ground-state energy; Coupling constant; Fröhlich model; Finite temperature | 1991-10 |
| 267 |
 |
DeTar, Carleton | Continuum limit in the quenched approximation | Previous work at G/g2 = 5.7 with quenched staggered quarks is extended with new calculations at 5.85 and 6.15 on lattices up to 323 x 64. These calculations allow a more detailed study of extrapolation in quark mass, finite volume and lattice spacing than has heretofore been possible. We discuss h... | Decay constants; Staggered quarks; Wilson quarks | 1996-03 |
| 268 |
 |
Vardeny, Zeev Valentine; Ehrenfreund, Eitan A. | Phonon spectroscopy in π-conjugated polymers; the role of the excited electronic states | The Raman active vibrational modes in 7r-conjugated polymers are known to have different frequencies in different types of experiments. The best known examples are the resonant Raman scattering (RRS) and doping or photoinduced absorption infrared active vibrations (IRAV) measurements, in which the s... | pi-conjugated polymers; Phonon spectroscopy; Resonant Raman scattering; ir-active phonons | 1997 |
| 269 |
 |
Wu, Yong-Shi | Quantum dynamics and statistics of vortices in two-dimensional superfluids | The phase change of the wave function of a superfluid film as a vortex moves around a closed path counts the number of superfluid particles enclosed by that path. This result is used to investigate whether such vortices obey "fractional statistics." We conclude that this is not the case in compress... | Superfluid films; Vortices; Fractional statistics | 1985-12 |
| 270 |
 |
Vardeny, Zeev Valentine; Raikh, Mikhail E. | Universal properties of random lasers | The design and fabrication of laser resonators is often difficult. However, random lasers occur in gain media with numerous scatterers and produce coherent laser emission without any predesigned cavity. The generation of coherent emission from multiple scattering is quite general and its basic prin... | Random lasers; Laser resonators; pi-conjugated polymers; Rhodamine-TiO2 suspensions; Random media; Random lasing | 2003-01 |
| 271 |
 |
Wu, Yong-Shi | Scale and conformal invariance in Chern-Simons-matter field theory | We study perturbative renormalization of Dsss3 Chern-Simons gauge theory coupled to scalar and fermionic matter. We show that in the non-Abelian case the coefficient of the Chern-Simons term has infinite renormalization and that both the matter and the non-Abelian gauge fields acquire nonvanishing ... | Chern-Simons gauge theory; Renormalization | 1991-09 |
| 272 |
 |
DeTar, Carleton | QCD thermodynamics with an improved lattice action | We have investigated QCD with two flavors of degenerate fermions using the Symanzik-improvement program for both the gauge and fermion actions. Our study focuses on the deconfinement transition on an Nt=4 lattice. Having located the thermal transition, we performed zero temperature simulations nea... | Wilson fermions; Polyakov loop; Chiral symmetry; Phase transitions | 1997-11 |
| 273 |
 |
Thomas, Kirk R.; Capecchi, Mario R. | Location of crossovers during gene targeting with insertion and replacement vectors. | Gene targeting was used to introduce nonselectable genetic changes into chromosomal loci in mouse embryo-derived stem cells. The nonselectable markers were linked to a selectable marker in both insertion- and replacement-type vectors, and the transfer of the two elements to the Hprt locus was assaye... | Genetic Vectors; Molecular Sequence Data; Restriction Mapping | 1993-04 |
| 274 |
 |
Vardeny, Zeev Valentine | Below-gap excitation of ∏-conjugated polymer-fullerene blends: implications for bulk organic heterojunction solar cells | We used a variety of optoelectronic techniques such as broadband fs transient and cw photomodulation spectroscopies, electroabsorption, and short-circuit photocurrent in bulk heterojunctions organic solar cells for studying the photophysics in ∏-conjugated polymer-fullerene blends with below-gap... | pi-conjugated polymers; Fullerene blends; Below-gap excitations; Bulk heterojunctions; Bulk organic heterojunction solar cells; Photophysics | 2008-07 |
| 275 |
 |
Lupton, John Mark | Monitoring surface charge movement in single elongated semiconductor nanocrystals | We demonstrate a universal correlation between the spectral linewidth and position of the excitonic transition in the spectral jitter observed from single elongated colloidal quantum dots. Breaking the symmetry of electron and hole confinement as well as of the spatial directions for surface charge ... | Surface charge movement; Spectral linewidth; Excitonic transition; Spectral jitter; Colloidal nanocrystals | 2004-10 |
