Results 41 to 50 of about 80,485 (247)

The Hoop Conjecture in Spherically Symmetric Spacetimes [PDF]

open access: yes, 2009
We give general sufficient conditions for the existence of trapped surfaces due to concentration of matter in spherically symmetric initial data sets satisfying the dominant energy condition.
K. Thorne   +3 more
core   +1 more source

Antagonistic Regulation of Neurite Morphology through Gq/G11 and G12/G13 [PDF]

open access: yesJournal of Biological Chemistry, 2008
The induction of neurite retraction and growth cone collapse via G-protein-coupled receptors is involved in developmental as well as regenerative processes. The role of individual G-protein-mediated signaling processes in the regulation of neurite morphology is still incompletely understood. Using primary neurons from brains lacking Galpha(q)/Galpha(11)
Anja U. Bräuer   +4 more
openaire   +3 more sources

Tophaceous Gout of the Patella: A Report of Two Cases

open access: yesCase Reports in Rheumatology, 2012
Introduction. Tophaceous gout of the patella is rare and may masquerade as a tumour or tumour-like condition. Cases. We report two patients with gout involving the patella, one complicated by a pathological fracture and the other occurring in a bipartite
Graeme Hopper   +5 more
doaj   +1 more source

The White Dwarfs within 25 Parsecs of the Sun: Kinematics and Spectroscopic Subtypes [PDF]

open access: yes, 2014
We present the fractional distribution of spectroscopic subtypes, range and distribution of surface temperatures, and kinematical properties of the white dwarfs within 25pc of the sun.
Holberg, J. B.   +5 more
core   +4 more sources

Peptide Vocabulary Analysis Reveals Ultra-Conservation and Homonymity in Protein Sequences

open access: yesBioinformatics and Biology Insights, 2007
A new algorithm is presented for vocabulary analysis (word detection) in texts of human origin. It performs at 60%–70% overall accuracy and greater than 80% accuracy for longer words, and approximately 85% sensitivity on Alice in Wonderland , a ...
Derek Gatherer
doaj   +1 more source

Hydrodynamic transport functions from quantum kinetic theory [PDF]

open access: yes, 2000
Starting from the quantum kinetic field theory [E. Calzetta and B. L. Hu, Phys. Rev. D37, 2878 (1988)] constructed from the closed-time-path (CTP), two-particle-irreducible (2PI) effective action we show how to compute from first principles the shear and
A. Campos   +56 more
core   +2 more sources

Design of an Optimized Terahertz Time-Domain Spectroscopy System Pumped by a 30 W Yb:KGW Source at a 100 kHz Repetition Rate with 245 fs Pulse Duration

open access: yesApplied Sciences
Ytterbium laser sources are state-of-the-art systems that are increasingly replacing Ti:Sapphire lasers in most applications requiring high repetition rate pulse trains.
Lennart Hirsch   +4 more
doaj   +1 more source

Requirement of Gαq/Gα11 Signaling in the Preservation of Mouse Intestinal Epithelial HomeostasisSummary

open access: yesCellular and Molecular Gastroenterology and Hepatology, 2016
Background & Aims: Proliferation, differentiation, and morphogenesis of the intestinal epithelium are tightly regulated by a number of molecular pathways. Coordinated action of intestine is achieved by gastrointestinal hormones, most of which exert these
Noboru Watanabe   +6 more
doaj   +1 more source

A generalization of Szebehely's inverse problem of dynamics in dimension three [PDF]

open access: yes, 2016
Extending a previous paper, we present a generalization in dimension 3 of the traditional Szebehely-type inverse problem. In that traditional setting, the data are curves determined as the intersection of two families of surfaces, and the problem is to ...
Mestdag, T., Prince, G., Sarlet, W.
core   +3 more sources

Commuting involutions of Lie algebras, commuting varieties, and simple Jordan algebras [PDF]

open access: yes, 2013
We study certain "\sigma-commuting varieties" associated with a pair of commuting involutions of a semisimple Lie algebra $\g$. The usual commuting variety of $\g$ and commuting varieties related to one involution are particular cases of our construction.
Panyushev, D.
core   +2 more sources

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