11,054 research outputs found
Cross Elasticity of Supply: As Big a Secret in Canada as It Is in the U.S.
In a prior study, the author determined that cross elasticity of supply is rarely discussed in intermediate microeconomics, and industrial organization textbooks used in U. S. universities. He did, however, find that the American judicial system has increasingly relied upon the concept in defining product markets. In the present paper, the author examines cross elasticity of supply in economics textbooks in Canadian universities. Similar to his prior study, the author found virtually no mention of the concept in the Canadian textbooks. However, unlike the prior study, he found no appreciable reliance upon cross elasticity of supply in defining product markets by Canadian courts. Though perplexed over its lack of academic discussion, the author is encouraged by the deference paid to cross elasticity of supply by American courts.
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Erratum to: Experimental syntax and the variation of island effects in English and Italian, Nat Lang Linguist Theory, (2015), 10.1007/s11049-015-9286-8
Coalescence Models For Hadron Formation From Quark Gluon Plasma
We review hadron formation from a deconfined quark gluon plasma (QGP) via
coalescence or recombination of quarks and gluons. We discuss the abundant
experimental evidence for coalescence from the Relativistic Heavy Ion Collider
(RHIC) and compare the various coalescence models advocated in the literature.
We comment on the underlying assumptions and remaining challenges as well as
the merits of the models. We conclude with a discussion of some recent
developments in the field.Comment: Review to appear in Annu. Rev. Nucl. Part. Sci. 58; 58 pages, 13
figures, 1 tabl
Resistojet systems studies directed to the space station/space base. Volume 2 - Biowaste resistojet system development program Final report
Space station/base biowaste resistojet system for orbit keeping and control moment gyro desaturation - systems developmen
Transport properties of isospin effective mass splitting
We investigate in detail the momentum dependence () of the effective in
medium Nucleon-Nucleon () interaction in the isovector channel. We focus
the discussion on transport properties of the expected neutron-proton ()
effective mass splitting at high isospin density. We look at observable effects
from collective flows in Heavy Ion Collisions () of charge asymmetric
nuclei at intermediate energies. Using microscopic kinetic equation simulations
nucleon transverse and elliptic collective flows in collisions are
evaluated. In spite of the reduced charge asymmetry of the interacting system
interesting effects are revealed. Good observables, particularly
sensitive to the -mass splitting, appear to be the differences between
neutron and proton flows. The importance of more exclusive measurements, with a
selection of different bins of the transverse momenta () of the emitted
particles, is stressed. In more inclusive data a compensation can be expected
from different -contributions, due to the microscopic
structure of the nuclear mean field in asymmetric matter.Comment: 18 pages, 11 figure
Dynamical properties of a strongly correlated model for quarter-filled layered organic molecular crystals
The dynamical properties of an extended Hubbard model, which is relevant to
quarter-filled layered organic molecular crystals, are analyzed. We have
computed the dynamical charge correlation function, spectral density, and
optical conductivity using Lanczos diagonalization and large-N techniques. As
the ratio of the nearest-neighbour Coulomb repulsion, V, to the hopping
integral, t, increases there is a transition from a metallic phase to a charge
ordered phase. Dynamical properties close to the ordering transition are found
to differ from the ones expected in a conventional metal. Large-N calculations
display an enhancement of spectral weight at low frequencies as the system is
driven closer to the charge ordering transition in agreement with Lanczos
calculations. As V is increased the charge correlation function displays a
plasmon-like mode which, for wavevectors close to (pi,pi), increases in
amplitude and softens as the charge ordering transition is approached. We
propose that inelastic X-ray scattering be used to detect this mode. Large-N
calculations predict superconductivity with dxy symmetry close to the ordering
transition. We find that this is consistent with Lanczos diagonalization
calculations, on lattices of 20 sites, which find that the binding energy of
two holes becomes negative close to the charge ordering transition.Comment: 22 pages, 16 eps figures; caption of Fig. 5 correcte
Non-Fermi liquid behavior in nearly charge ordered layered metals
Non-Fermi liquid behavior is shown to occur in two-dimensional metals which
are close to a charge ordering transition driven by the Coulomb repulsion. A
linear temperature dependence of the scattering rate together with an increase
of the electron effective mass occur above T*, a temperature scale much smaller
than the Fermi temperature. It is shown that the anomalous temperature
dependence of the optical conductivity of the quasi-two-dimensional organic
metal alpha-(BEDT-TTF)2MHg(SCN)4, with M=NH4 and Rb, above T*=50-100 K, agrees
qualitatively with our predictions for the electronic properties of nearly
charge ordered two-dimensional metals.Comment: accepted in Phys. Rev. Let
Comparison of dynamical multifragmentation models
Multifragmentation scenarios, as predicted by antisymmetrized molecular
dynamics (AMD) or momentum-dependent stochastic mean-field (BGBD) calculations
are compared. While in the BGBD case fragment emission is clearly linked to the
spinodal decomposition mechanism, i.e. to mean-field instabilities, in AMD
many-body correlations have a stronger impact on the fragmentation dynamics and
clusters start to appear at earlier times. As a consequence, fragments are
formed on shorter time scales in AMD, on about equal footing of light particle
pre-equilibrium emission. Conversely, in BGBD pre-equilibrium and fragment
emissions happen on different time scales and are related to different
mechanisms
Cooperative effect of phonons and electronic correlations for superconductivity in cobaltates
We propose that unconventional superconductivity in hydrated sodium cobaltate
results from an interplay of electronic correlations and
electron-phonon interactions. On the basis of the model plus phonons we
found evidences for a) unconventional superconductivity, b) realistic values of
and c) the dome shape existing near . This picture is
obtained for close to the critical Coulomb repulsion which separates
the uniform Fermi liquid from CDW ordered phase.Comment: 4 pages, 3 figure
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