2,695 research outputs found
Separator development for a heat sterilizable battery
Coating procedure for tape separator of heat sterilizable batter
Separator development for a heat sterilizable battery Quarterly report, 1 Jan. - 31 Mar. 1968
Dip coating method for manufacturing sterilizable battery tape separator
Separator development for a heat sterilizable battery Quarterly report, 1 Apr. - 30 Jun. 1968
Flame absorption spectroscopic analysis of support tape
Separator development for a heat sterilizable battery Quarterly report, Oct. 1 - Dec. 31, 1967
Zirconium oxide loadings and coating methods varied to improve separators for heat sterilizable batter
The bisymplectomorphism group of a bounded symmetric domain
An Hermitian bounded symmetric domain in a complex vector space, given in its
circled realization, is endowed with two natural symplectic forms: the flat
form and the hyperbolic form. In a similar way, the ambient vector space is
also endowed with two natural symplectic forms: the Fubini-Study form and the
flat form. It has been shown in arXiv:math.DG/0603141 that there exists a
diffeomorphism from the domain to the ambient vector space which puts in
correspondence the above pair of forms. This phenomenon is called symplectic
duality for Hermitian non compact symmetric spaces.
In this article, we first give a different and simpler proof of this fact.
Then, in order to measure the non uniqueness of this symplectic duality map, we
determine the group of bisymplectomorphisms of a bounded symmetric domain, that
is, the group of diffeomorphisms which preserve simultaneously the hyperbolic
and the flat symplectic form. This group is the direct product of the compact
Lie group of linear automorphisms with an infinite-dimensional Abelian group.
This result appears as a kind of Schwarz lemma.Comment: 19 pages. Version 2: minor correction
Riemannian geometry of Hartogs domains
Let D_F = \{(z_0, z) \in {\C}^{n} | |z_0|^2 < b, \|z\|^2 < F(|z_0|^2) \} be
a strongly pseudoconvex Hartogs domain endowed with the \K metric
associated to the \K form .
This paper contains several results on the Riemannian geometry of these
domains. In the first one we prove that if admits a non special geodesic
(see definition below) through the origin whose trace is a straight line then
is holomorphically isometric to an open subset of the complex hyperbolic
space. In the second theorem we prove that all the geodesics through the origin
of do not self-intersect, we find necessary and sufficient conditions on
for to be geodesically complete and we prove that is locally
irreducible as a Riemannian manifold. Finally, we compare the Bergman metric
and the metric in a bounded Hartogs domain and we prove that if
is a multiple of , namely , for some , then is holomorphically isometric to an open subset of the complex
hyperbolic space.Comment: to appear in International Journal of Mathematic
Quasi-saddles as relevant points of the potential energy surface in the dynamics of supercooled liquids
The supercooled dynamics of a Lennard-Jones model liquid is numerically
investigated studying relevant points of the potential energy surface, i.e. the
minima of the square gradient of total potential energy . The main findings
are: ({\it i}) the number of negative curvatures of these sampled points
appears to extrapolate to zero at the mode coupling critical temperature ;
({\it ii}) the temperature behavior of has a close relationship with the
temperature behavior of the diffusivity; ({\it iii}) the potential energy
landscape shows an high regularity in the distances among the relevant points
and in their energy location. Finally we discuss a model of the landscape,
previously introduced by Madan and Keyes [J. Chem. Phys. {\bf 98}, 3342
(1993)], able to reproduce the previous findings.Comment: To be published in J. Chem. Phy
Femtosecond β-cleavage dynamics: Observation of the diradical intermediate in the nonconcerted reactions of cyclic ethers
Femtosecond (fs) dynamics of reactions of cyclic ethers, symmetric and asymmetric structures, are reported. The diradical intermediates and their beta-cleavages, which involve simultaneous C-C, C-H sigma-bond breakage and C-O, C-C pi-bond formation, are observed and studied by fs-resolved mass spectrometry. To compare with experiments, we present density functional theory calculations of the potential energy surface and microcanonical rates and product distributions
GABA and Muscimol as Reversible Inactivation Tools in Learning and Memory
Reversible inactivation of brain areas is a useful method for inferring brain-behavior relationships. Infusion of GABA or of the GABA receptor agonist muscimol is considered one interesting reversible inactivation method because it may not affect fibers of passage and may therefore be compared to axon-sparing types of lesions. This article reviews the data obtained with this method in learning and memory experiments. A critical analysis of data, collected in collaboration with Simon Brailowsky, with chronic GABA infusion is presented, together with an illustration of data obtained with muscimol-induced inactivation
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