1,980 research outputs found
A home for the imagination: national identity in the poetry of Allen Curnow, A.R.D. Fairburn, and R.A.K. Mason
Call number: LD2668 .R4 1967 V2
Scaling the propulsive performance of heaving and pitching foils
Scaling laws for the propulsive performance of rigid foils undergoing
oscillatory heaving and pitching motions are presented. Water tunnel
experiments on a nominally two-dimensional flow validate the scaling laws, with
the scaled data for thrust, power, and efficiency all showing excellent
collapse. The analysis indicates that the behaviour of the foils depends on
both Strouhal number and reduced frequency, but for motions where the viscous
drag is small the thrust closely follows a linear dependence on reduced
frequency. The scaling laws are also shown to be consistent with biological
data on swimming aquatic animals.Comment: 11 page
Negatively Charged Strangelet Search using the E864 Spectrometer at the AGS
We provide a status report on the progress of searching for negatively
charged strangelets using the E864 spectrometer at the AGS. About 200 million
recorded events representing approximately 14 billion 10% central interactions
of Au + Pt at 11.5 GeV/c taken during the 1996-1997 run of the experiment are
used in the analysis. No strangelet candidates are seen for charges Z=-1 and
Z=-2, corresponding to a 90% confidence level for upper limits of strangelet
production of ~1 x 10^{-8} and ~4 x 10^{-9} per central collision respectively.
The limits are nearly uniform over a wide range of masses and are valid only
for strangelets which are stable or have lifetimes greater than ~50 ns.Comment: 6 pages, 4 figures; Talk at SQM'98, Padova, Italy (July 20-24, 1998
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