35,543 research outputs found
Motor drivers for dc brushless motors
Nondestructive tests of motor drivers for delta wound dc brushless motor
Correlation length and negative phase velocity in isotropic dielectric-magnetic materials
A composite material comprising randomly distributed spherical particles of
two different isotropic dielectric-magnetic materials is homogenized using the
second-order strong-property-fluctuation theory in the long-wavelength
approximation. Whereas neither of the two constituent materials by itself
supports planewave propagation with negative phase velocity (NPV), the
homogenized composite material (HCM) can. The propensity of the HCM to support
NPV propagation is sensitive to the distributional statistics of the
constituent material particles, as characterized by a two--point covariance
function and its associated correlation length. The scope for NPV propagation
diminishes as the correlation length increases
Rearing orphan kangaroos
LICENCES are required in Western Australia if certain kangaroos and all species of wallabies are kept in captivity, but orphaned young joeys often need care and hand feeding before they can be released to fend for themselves
Buying veterinary products : read the label first
Chenicals for animal health, and processed feeds must be registered and labelled.
Registration is intended to insure that products are effective for the purpose they are sold, and safe when used according to instructions.
It is important to read the lable to understand the correct use of the product
Two causes of reduced profit from pigs
LOSS of condition in a pig affects profits more severely than slow rate of growth.
Two common symptoms, scouring and itching, cause weight loss and are followed by a period of reduced weight gain
Planck Scale Cosmology in Resummed Quantum Gravity
We show that, by using resummation techniques based on the extension of the
methods of Yennie, Frautschi and Suura to Feynman's formulation of Einstein's
theory, we get quantum field theoretic predictions for the UV fixed-point
values of the dimensionless gravitational and cosmological constants.
Connections to the phenomenological asymptotic safety analysis of Planck scale
cosmology by Bonanno and Reuter are discussed.Comment: 7 pages, 1 figur
Radiative corrections in processes at the SSC
We discuss radiative corrections for interactions in the SSC environment.
Based on the theory of Yennie, Frautschi and Suura, we develop appropriate
Monte Carlo event generators to compute the background electromagnetic
radiation. Our results indicate that multiple-photon effects must be taken into
account in the study of SSC physics such as Higgs decay.Comment: UTHEP-92-0901, 15 pages (incl. 3 figures), LaTeX (Talk presented at
the XXXII Cracow School of Theoretical Physics, Zakopane, June 1992
Massive Elementary Particles and Black Holes
An outstanding problem posed by Einstein's general theory of relativity to
the quantum theory of point particle fields is the fate of a massive point
particle; for, in the classical solutions of Einstein's theory, such a system
should be a black hole. We use exact results in a new approach to quantum
gravity to show that this conclusion is obviated by quantum loop effects.
Phenomenological implications are discussedComment: 11 pages; 1 figure; improved text relating to asymptotic safet
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