23,174 research outputs found
Crossed conductance in FSF double junctions: role of out-of-equilibrium populations
We discuss a model of Ferromagnet / Superconductor / Ferromagnet (FSF) double
junction in which the quasiparticles are not in equilibrium with the condensate
in a region of the superconductor containing the two FS contacts. The role of
geometry is discussed, as well as the role of a small residual density of
states within the superconducting gap, that allows a sequential tunneling
crossed current. With elastic quasiparticle transport and the geometry with
lateral contacts, the crossed conductances in the sequential tunneling channel
are almost equal in the normal and superconducting phases, if the distance
between the FS interfaces is sufficiently small. The sequential tunneling and
spatially separated processes (the so-called crossed Andreev reflection and
elastic cotunneling processes) lead to different signs of the crossed current
in the antiparallel alignment for tunnel interfaces.Comment: 8 pages, 4 figure
Picosecond excitation of jet-cooled hydrogen-bonded systems: Dispersed fluorescence and time-resolved studies of methyl salicylatea
Long progressions involving frequency intervals of 180 cm^(â1) are observed in the fluoresence of MS for 3327.5 Ă
excitation. (AIP
Effect of habituation on the susceptibility of the rat to restraint ulcers
The frequency and gravity of restraint ulcers were found to significantly diminish in rats previously exposed to brief periods of immobilization. The rats' becoming habituated to restraint conditions probably explains this phenomenon
Observation of intracavity absorption of molecules in supersonic beams
Intracavity absorption studies of DMT and I2 are reported at rotational and vibrational temperatures of <0.1 K and 16 K, respectively
Why some fields might be rectangular: an exploration of agricultural landscapes between pre-capitalist and capitalist modes of production
This article is a preliminary investigation of possible spatial form which starts by rejecting the idea that spatial theory can be built from assumptions of isomorphism. It examines spatial form in high potential ridge valley areas which are densely populated, and identifies the transition in land configuration for pre-capitalist to capitalist modes of production. In building the argument simple geometric patterns that differentiate from the model are postulated. The basic drivers of the differing spatial systems are essentially the superstructural legal conditions which are postulated as a moving from communal, customary law to individual statutory property rights
Exploring Farm Business and Household Expenditure Patterns and Community Linkages
Farm operators are an integral part of some rural economies. The businesses they operate often hire seasonal and full-time employees and purchase goods and services from local farm implement dealers, input suppliers, and financial institutions. Farm household spending on food, furniture and appliances, trucks and automobiles, and a range of consumer goods also support local jobs and retail businesses in some communities. Based on the 2002 agricultural census and the 2004 Agricultural Resource Management Survey, this paper explores the linkages between farm household/ business expenditures and local communities.Farm business expenditures, farm household spending, employment, community linkage, Consumer/Household Economics, Farm Management, Community/Rural/Urban Development,
5D Yang-Mills instantons from ABJM Monopoles
In the presence of a background supergravity flux, N M2-branes will expand
via the Myers effect into M5-branes wrapped on a fuzzy three-sphere. In
previous work the fluctuations of the M2-branes were shown to be described by
the five-dimensional Yang-Mills gauge theory associated to D4-branes. We show
that the ABJM prescription for eleven-dimensional momentum in terms of magnetic
flux lifts to an instanton flux of the effective five-dimensional Yang-Mills
theory on the sphere, giving an M-theory interpretation for these instantons.Comment: 29 pages, Latex; v2: added references and a comment on the
graviphoton coupling in section 5; v3: typos corrected and references adde
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