9,415 research outputs found
Holomorphic extension of smooth CR-mappings between real-analytic and real-algebraic CR-manifolds
We establish results on holomorphic extension of CR-mappings of class
between a real-analytic CR-submanifold of \C^N and a
real-algebraic CR-submanifold of \C^{N'}
Detectability of f-mode Unstable Neutron Stars by the Schenberg Spherical Antenna
The Brazilian spherical antenna (Schenberg) is planned to detect high
frequency gravitational waves (GWs) ranging from 3.0 kHz to 3.4 kHz. There is a
host of astrophysical sources capable of being detected by the Brazilian
antenna, namely: core collapse in supernova events; (proto)neutron stars
undergoing hydrodynamical instability; f-mode unstable neutron stars, caused by
quakes and oscillations; excitation of the first quadrupole normal mode of 4-9
solar mass black holes; coalescence of neutron stars and/or black holes; exotic
sources such as bosonic or strange matter stars rotating at 1.6 kHz; and
inspiralling of mini black hole binaries. We here address our study in
particular to the neutron stars, which could well become f-mode unstable
producing therefore GWs. We estimate, for this particular source of GWs, the
event rates that in principle can be detected by Schenberg and by the Dutch
Mini-Grail antenna.Comment: 7 pages, 3 figures; Classical and Quantum Gravity (in press
Holographic Complexity and Fidelity Susceptibility as Holographic Information Dual to Different Volumes in AdS
The holographic complexity and fidelity susceptibility have been defined as
new quantities dual to different volumes in AdS. In this paper, we will use
these new proposals to calculate both of these quantities for a variety of
interesting deformations of AdS. We obtain the holographic complexity and
fidelity susceptibility for an AdS black hole, Janus solution and a solution
with cylindrically symmetry, an inhomogeneous background and a hyperscaling
violating background. It is observed that the holographic complexity depends on
the size of the subsystem for all these solutions and the fidelity
susceptibility does not have any such dependence.Comment: Slighly updated version. Accepted for publication in Phys. Letters
On the existence of chaotic circumferential waves in spinning disks
We use a third-order perturbation theory and Melnikov's method to prove the
existence of chaos in spinning circular disks subject to a lateral point load.
We show that the emergence of transverse homoclinic and heteroclinic points
respectively lead to a random reversal in the traveling direction of
circumferential waves and a random phase shift of magnitude for both
forward and backward wave components. These long-term phenomena occur in
imperfect low-speed disks sufficiently far from fundamental resonances.Comment: 8 pages, 5 figures, to appear in CHAOS (Volume 17, Issue 2, June
2007
Correction of neglected post-burn severe calcaneo-valgus deformity of foot with Joshi’s external stabilization system: a one stage surgical procedure
Post burn calcaneovalgus is a complex foot deformity and management becomes increasingly difficult especially if deformity is neglected in growing young child resulting in secondary bony deformity. A simple technique of single stage surgical correction with Joshi’s external stabilization system (JESS) is described using principle of distraction osteogenesis or histogenesis without need of extensive plastic surgical procedure. A functional plantigrade foot is achieved after completion of the procedure without need of any bony procedure and least chances of any neurovascular compromise. JESS is a versatile external fixation device for correction of neglected postburn complex calcaneovalgus deformity
Comparison of Composition and Degradation Characteristics of Early Bloom Alfalfa with Fenugreek (Trigonella Foenum-Graecum) Forages Harvested at Different Stages of Maturity
The objective of this study was to compare the composition and degradation characteristics of early bloom alfalfa and fenugreek harvested after 9, 15 and 17 wk of growth. Crude protein (CP) content of fenugreek cut at 9, 15 and 17 wk was lower (P\u3c0.05) than that of alfalfa. Neutral detergent fibre (NDF) and lignin content of fenugreek harvested after 15 and 17 wk were higher (P\u3c0.05) than that of alfalfa. Ash content was lower (P\u3c0.05) in fenugreek than for alfalfa. In vitro dry matter disappearance (IVDMD) of fenugreek cut at 15 and 17 wk was similar to that of alfalfa. Total in vitro gas production of fenugreek cut at the three stages of growth was not significantly different from those observed for alfalfa. Results indicate that chemical composition and IVDMD of fenugreek at all stages of maturity were comparable to that of early bloom alfalfa
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