When dissipative terms are dropped, all of the important models of plasma physics are described by partial differential equations that possess Hamiltonian form in terms of noncanonical Poisson brackets. For example, this is the case for ideal magnetohydrodynamics, the Vlasov–Maxwell equations, and other systems see Refs. 7–9 for review . Among these, there exist several reduced fluid models who...

We report the discovery of a significant old population in the dwarf spheroidal (dSph) galaxy Leo I as a result of a wide-area search with the ESO New Technology Telescope. Studies of the stellar content of Local Group dwarf galaxies have shown the presence of an old stellar population in almost all of the dwarf spheroidal galaxies. The only exception was Leo I, which alone appeared to have del...

Communication via satellite begins when the satellite is positioned in the desired orbital position. Ground stations can communicate with LEO (Low Earth Orbiting) satellites only when the satellite is in their visibility region. The ground station’s ideal horizon plane is in fact the visibility region under 0 ̊ of elevation angle. Because of natural barriers or too high buildings in urban areas,...

We derive new eeective radii and total magnitudes for 5 E and S0 galaxies in the Leo-I group from wide-eld CCD images. These are used in conjunction with recent literature velocity data to construct the fundamental plane (FP) of the Leo-I group. The rms scatter that we nd is only 6 % in distance. The zero point of this relation provides a calibration of the FP as a distance indicator and direct...

Replicative senescence is thought to relate to aging in vivo and tumor suppression. In this report, we isolated a gene and designated it as RDL (replicative senescence down-regulated Leo1-like gene). RDL's expression decreased upon replicative senescence of human diploid 2BS fibroblasts. Overexpression of RDL slightly delayed 2BS fibroblast senescence, whereas suppression of RDL expression impo...

The present distribution of intact objects is a good proxy to quantify the catastrophic collision risk and consequences in the coming decades. The results of a large number of long term simulations of the LEO environment perturbed by the collisional fragmentation of massive objects are used to identify the main driving parameters of the long term collisional evolution of the debris population a...

Several studies have investigated the antinociceptive, immunomodulatory and anti-inflammatory properties of compounds found in the lavender essential oil (LEO), however to date, there is still lack of substantial data. The objective of this study was to assess the antioxidant, anti-inflammatory and antinociceptive effects of lavender essential oil. The 1,1-diphenyl-2-picrylhydrazyl radical deco...

GPS radio occultation technique has been developed resulting from remote sensing applications in planetary atmospheric limb sounding pioneered by JPL and Stanford University in 1960s. Since the launch of the experimental satellite MicroLab1 on April 3 1995, the primary results from this Low Earth orbiter (LEO) satellite demonstrated potential scienti:c values and practical signi:cance of this i...

Analysis of meiotic tetrads is routinely used to determine genetic linkage in various fungi. Here we apply tetrad analysis to the study of genetic linkage in a vertebrate. The half-tetrad genotypes of gynogenetic diploid zebrafish produced by early-pressure (EP) treatment were used to investigate the linkage relationships of two recessive pigment pattern mutations, leopard (leo) and rose (ros)....

1Leon H. Charney Division of Cardiology and Marc and Ruti Bell Program in Vascular Biology, Department of Medicine, New York University School of Medicine, New York, NY 10016, USA; 2Department of Microbiology, New York University School of Medicine, New York, New York, NY 10016, USA; 3Regulus Therapeutics, San Diego, California, USA; 4Division of Molecular Medicine, Department of Medicine, Colu...