142,271 research outputs found
Spatial variations in road collision propensities in London
Propensity to be involved in a road traffic collision in Greater London is likely to depend on
many factors, including personal mobility, lifestyle, behaviour, neighbourhood characteristics
and environment. This paper seeks to identify in terms of geodemographic type the propensity
of individuals to be involved in collisions and to examine geographic variations in such
propensities with distance from Central London. Results for Central London suggest only a
small number of Mosaic types portray a higher than average index score (over 100),
translating into a higher risk for a smaller proportion of London’s geodemographic types.
This contrasts with results which show a larger number of Mosaic classifications having
higher than average index scores further from Central London. The results highlight a need,
through enhanced spatial analysis, for better understanding of the spatially incidence of
collisions which are putting at risk the lives of London residents
Digital synchronizer Patent
Digital synchronizer for extracting binary data in receiver of PSK/PCM communication syste
Block encoders for Reed-Muller codes
Encoding algorithms generate a 32 x 64-bit matrix Reed-Muller code from a 6-bit orthogonal code-word. This increases error-free reception by a high rate telemetry channel under adverse signal noise with minimal use of additional hardware
Boundary regularity, uniqueness and non-uniqueness for AH Einstein metrics on 4-manifolds
This paper studies several aspects of asymptotically hyperbolic Einstein
metrics, mostly on 4-manifolds. We prove boundary regularity (at infinity) for
such metrics and establish uniqueness under natural conditions on the boundary
data. By examination of explicit black hole metrics, it is shown that neither
uniqueness nor finiteness holds in general for AH Einstein metrics with a
prescribed conformal infinity. We then describe natural conditions which are
sufficient to ensure finiteness.Comment: 33pp, gap in one proof fixed, exposition improved. To appear in
Advances in Mat
- …