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Scalar models for the generalized Chaplygin gas and the structure formation constraints
Scalar models the generalized Chaplygin gas
2010/12/24
The generalized Chaplygin gas model represents a tentative to unify dark matter and dark energy. It is characterized by a fluid with an equation of state $p = - A/\rho^\alpha$. It can be obtained fro...
Five-Brane Superpotentials, Blow-Up Geometries and SU(3) Structure Manifolds
Five-Brane Superpotentials Blow-Up Geometries SU(3) Structure Manifolds
2010/12/24
We investigate the dynamics of space-time filling five-branes wrapped on curves in heterotic and orientifold Calabi-Yau compactifications. We first study the leading N=1 scalar potential on the infini...
The built-up land represents an important type of overall landscape. In this paper the built-up land structure in the largest cities in the Czech Republic and selected cities in the U.S.A. is analyse...
Helium fine structure theory for determination of \alpha
Helium fine structure theory determination
2010/11/16
We present recent progress in the calculation of the helium fine-structure splitting of the 2^3P_J states, based on the quantum electrodynamic theory. Apart from the complete evaluation of m\alpha^7 ...
Interplay between the small and the large scale structure of spacetime
the small the large scale structure of spacetime
2010/11/16
Existence of frame invariant, maximum, time interval $T$, length $L$, and mass $M$ is postulated. In the de Sitter universe - (1) the life span of universe, (2) the circumference of universe at the p...
The Spin-dependent Structure Function of the Proton g_1^p and a Test of the Bjorken Sum Rule
COMPASS Deep inelastic scattering Spin Structure function QCD analysis Bjorken sum rule
2010/3/15
The inclusive double-spin asymmetry, A_1^p, has been measured at COMPASS in deepinelastic polarised muon scattering off a large polarised NH3 target. The data, collected in the year 2007, cover the ra...
Study of the Structure and Some Physical Properties of Sodium-Boro-Phosphate Glasses Containing Antimony and Iron Oxides
Glass structure Physical properties of glass Glass containing antimony and iron oxides
2010/4/13
Boro-phosphate glasses containing transition metal oxides are of special interest. Hence, some sodium-Boro-phosphate glasses containing iron and antimony oxides were prepared and investigated. The str...