2,964 research outputs found
Pilot-booster control valve
Two-stage, pressure-sensing control valve is designed for servocontrol of 10-inch main tank valve regulating pressure of liquid oxygen in tank and serving to vent tank during filling. Valve uses a negative-rate Belleville spring to cancel positive spring rates of bellows and coil springs
Model Bond albedos of extrasolar giant planets
The atmospheres of extrasolar giant planets are modeled with various
effective temperatures and gravities, with and without clouds. Bond albedos are
computed by calculating the ratio of the flux reflected by a planet (integrated
over wavelength) to the total stellar flux incident on the planet. This
quantity is useful for estimating the effective temperature and evolution of a
planet. We find it is sensitive to the stellar type of the primary. For a 5
M_Jup planet the Bond albedo varies from 0.4 to 0.3 to 0.06 as the primary star
varies from A5V to G2V to M2V in spectral type. It is relatively insensitive to
the effective temperature and gravity for cloud--free planets. Water clouds
increase the reflectivity of the planet in the red, which increases the Bond
albedo. The Bond albedo increases by an order of magnitude for a 13 M_Jup
planet with an M2V primary when water clouds are present. Silicate clouds, on
the other hand, can either increase or decrease the Bond albedo, depending on
whether there are many small grains (the former) or few large grains (the
latter).Comment: 6 pages, 9 figures, uses egs.cls and epsfig.sty, submitted to Physics
and Chemistry of the Earth (proceedings of the April 1998 EGS meeting in
Nice, France
Greater Sensitivity to the Stimulating and Anxiety-Like Effects of Methamphetamine in the HIV-1 Transgenic Rat
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