منابع مشابه
The Student Dust Counter on the New Horizons Mission
The Student Dust Counter (SDC) experiment of the New Horizons Mission is an impact dust detector to map the spatial and size distribution of dust along the trajectory of the spacecraft across the solar system. The sensors are thin, permanently polarized polyvinylidene fluoride (PVDF) plastic films that generate an electrical signal when dust particles penetrate their surface. SDC is capable of ...
متن کاملA Note on the Cylindrical Collapse of Counter-rotating Dust
One of the outstanding issues of general relativity is that of the final state of gravitational collapse. Understandably, much has been written about spherical collapse , but comparatively less is known about non-spherical geometries. Thorne’s seminal analysis of cylindrical collapse 2 led him to formulate the hoop conjecture, which essentially states that horizons form when and only when the g...
متن کاملElectrovacuum Static Counter - Rotating Relativistic Dust Disks
A detailed study of the Counter-Rotating Model (CRM) for generic electrostatic (magnetostatic) axially symmetric thin disks without radial pressure is presented. We find a general constraint over the counter-rotating tangential velocities needed to cast the surface energy-momentum tensor of the disk as the superposition of two counter-rotating charged dust fluids. We then show that this constra...
متن کاملExact relativistic treatment of stationary counter-rotating dust disks I Boundary value problems and solutions
This is the first in a series of papers on the construction of explicit solutions to the stationary axisymmetric Einstein equations which describe counter-rotating disks of dust. These disks can serve as models for certain galaxies and accretion disks in astrophysics. We review the Newtonian theory for disks using Riemann-Hilbert methods which can be extended to some extent to the relativistic ...
متن کاملDust Particles and Aerosols: Impact on Biota “A Review” (Part I)
The impacts of Dust and Sand Storms (DSS) on people, crops, livestock, infrastructure and health are well documented. Data have accumulated on the deleterious effects of dust aerosols when they settle on plants. Sand blasting of low growing plants is a common cause of failure in reforestation efforts. Burial of plants by moving sands are also a cause of much damage. The physics of moving sand a...
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ژورنال
عنوان ژورنال: Journal of the Meteorological Society of Japan. Ser. II
سال: 1938
ISSN: 0026-1165,2186-9057
DOI: 10.2151/jmsj1923.16.6_250