16,424 research outputs found
AGAINST MECHANISM: METHODOLOGY FOR AN EVOLUTIONARY ECONOMICS
When the first economics departments were proposed at Cambridge and Oxford, the proponents thought acceptance would be improved if economics could be seen as incorporating the methods of physics. The enterprise was premised on the existence of economic laws that describe invariant relationships between events. These event regularities, like gravity, were not affected by human action. Humans could adapt and use them, but not change them. Thus the metaphor of "mechanism" seemed appropriate and became embedded in economists' language. It is common to use the term market mechanism to link prices and commodities. This suggests the economy is like turning a crank attached to a set of gears where there is a fixed relationship between the crank's motion and the last gear's motion. The gears have no ideas of their own, they don't get mad; there is no cognitive element between events and action.Institutional and Behavioral Economics,
Heun equation, Teukolsky equation, and type-D metrics
Starting with the whole class of type-D vacuum backgrounds with cosmological
constant we show that the separated Teukolsky equation for zero rest-mass
fields with spin (gravitational waves), (electromagnetic
waves) and (neutrinos) is an Heun equation in disguise.Comment: 27 pages, corrected typo in eq. (1
Observation of asymmetric spectrum broadening induced by silver nanoparticles in a heavy-metal oxide glass
We demonstrate experimentally and support by a theoretical analysis an effect
of asymmetric spectrum broadening, which results from doping of silver
nanoparticles into a heavy-glass matrix, 90(0.5WO3-0.3SbPO4-0.2PbO)-10AgCl. The
strong dispersion of the effective nonlinear coefficient of the composite
significantly influences the spectral broadening via the self-phase modulation,
and leads to a blue upshift of the spectrum. Further extension of the spectrum
towards shorter wavelengths is suppressed by a growing loss caused by the
plasmon resonance in the silver particles. The red-edge spectral broadening is
dominated by the stimulated Raman Scattering.Comment: Accepted for publishing epl13477; EPL Journal 201
Quantum Cournot equilibrium for the Hotelling-Smithies model of product choice
This paper demonstrates the quantization of a spatial Cournot duopoly model
with product choice, a two stage game focusing on non-cooperation in locations
and quantities. With quantization, the players can access a continuous set of
strategies, using continuous variable quantum mechanical approach. The presence
of quantum entanglement in the initial state identifies a quantity equilibrium
for every location pair choice with any transport cost. Also higher profit is
obtained by the firms at Nash equilibrium. Adoption of quantum strategies
rewards us by the existence of a larger quantum strategic space at equilibrium.Comment: 13 pages, 6 tables, 8 figure
Nematode communities, plant nutrient economy and life-cycle characteristics jointly determine plant monoculture performance over 12 years
Home range and habitat use by Kemp's Ridley turtles in West-Central Florida
The Kemp's ridley turtle (Lepidochelys kempii) is an endangered species whose recovery depends in part on
the identification and protection of required habitats. We used radio and sonic telemetry on subadult Kemp's ridley
turtles to investigate home-range size and habitat use in the coastal waters of west-central Florida from 1994 to
1996. We tracked 9 turtles during May-August up to 70 days after release and fou.ld they occupied 5-30 km2 foraging
ranges. Compositional analyses indicated that turtles used rock outcroppings in their foraging ranges at a
significantly higher proportion than expected. based on availability within the study area. Additionally. turtles used
live bottom (e.g .• sessile invertebrates) and green macroalgae habitats significantly more than seagrass habitat. Similar
studies are needed through'mt the Kemp's ridley turtles' range to investigate regional and stage-specific differences
in habitat use. which can then be used to conserve important foraging areas
Influence of correlations on molecular recognition
The influence of the patchiness and correlations in the distribution of
hydrophobic and polar residues at the interface between two rigid biomolecules
on their recognition ability is investigated in idealised coarse-grained
lattice models. A general two-stage approach is utilised where an ensemble of
probe molecules is designed first and the recognition ability of the probe
ensemble is related to the free energy of association with both the target
molecule and a different rival molecule in a second step. The influence of
correlation effects are investigated using numerical Monte Carlo techniques and
mean field methods. Correlations lead to different optimum characteristic
lengths of the hydrophobic and polar patches for the mutual design of the two
biomolecules on the one hand and their recognition ability in the presence of
other molecules on the other hand.Comment: 15 pages, 5 figure
Phase Behaviour of Amphiphilic Monolayers: Theory and Simulation
Coarse grained models of monolayers of amphiphiles (Langmuir monolayers) have
been studied theoretically and by computer simulations. We discuss some of the
insights obtained with this approach, and present new simulation results which
show that idealised models can successfully reproduce essential aspects of the
generic phase behaviour of Langmuir monolayers.Comment: To appear in J. Phys.: Cond. Matte
- …