1,721 research outputs found
On Hopf's Lemma and the Strong Maximum Principle
In this paper we consider Hopf's Lemma and the Strong Maximum Principle for
supersolutions to a class of non elliptic equations. In particular we prove a
sufficient condition for the validity of Hopf's Lemma and of the Strong Maximum
Principle and we give a condition which is at once necessary for the validity
of Hopf's Lemma and sufficient for the validity of the Strong Maximum
Principle.Comment: 27 pages,4 figure
A critical appraisal of ATLAS9 and NextGen 5 model atmospheres
The fitting atmosphere parameters (Teff, g, and [Fe/H]) for over 300 stars in
the Gunn & Striker and Jacoby et al. catalogs have been obtained relying on the
Kurucz (1992) ATLAS9 and Hauschildt et al (1999) NextGen5 synthesis models. The
output results are compared, and a critical appraisal of both theoretical codes
is performed.Comment: 2 pages, 2 figures; proceedings of "New Quests in Stellar
Astrophysics: The link between Stars and Cosmology", 26-30 March, 2001,
Puerto Vallarta, Mexico, eds. M. Chavez, A. Bressan, A. Buzzoni & D. Mayya,
to be published by the Kluwer Academic Publisher
Distinguishing Supersymmetry From Universal Extra Dimensions or Little Higgs Models With Dark Matter Experiments
There are compelling reasons to think that new physics will appear at or
below the TeV-scale. It is not known what form this new physics will take,
however. Although The Large Hadron collider is very likely to discover new
particles associated with the TeV-scale, it may be difficult for it to
determine the nature of those particles, whether superpartners, Kaluza-Klein
modes or other states. In this article, we consider how direct and indirect
dark matter detection experiments may provide information complementary to
hadron colliders, which can be used to discriminate between supersymmetry,
models with universal extra dimensions, and Little Higgs theories. We find
that, in many scenarios, dark matter experiments can be effectively used to
distinguish between these possibilities.Comment: 23 pages, 7 figures, references added in version
Human performance prediction in man-machine systems. Volume 1 - A technical review
Tests and test techniques for human performance prediction in man-machine systems task
Human performance prediction in man-machine systems. Part 2 - The test catalog
Human performance prediction in man machine systems - test catalog table
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