786 research outputs found
Thousand Aviator Study - Nonvestibular Contributions to Postural Equilibrium Functions
Psychomotor performance and postural equilibrium functioning defined by quantitative ataxia test battery, and relation to pilot selection and gerontolog
Factors contributing to the ballistocardiographic wave form in healthy middle aged males
Factors contributing to ballistocardiographic waveform in healthy middle aged male
Trends in systolic blood pressure in the thousand aviator cohort over a 24-year period
Age, weight, and parental longevity effects on trends in systolic blood pressure in thousand aviator cohort over 24 year perio
Constitutional and environmental factors related to serum lipid and lipoprotein levels
Serum lipoproteins and lipids in 657 human males correlated to multiple constitutional and environmental variable
Fluctuations and control in the Vlasov-Poisson equation
In this paper we study the fluctuation spectrum of a linearized
Vlasov-Poisson equation in the presence of a small external electric field.
Conditions for the control of the linear fluctuations by an external electric
field are established.Comment: 8 pages late
The Thousand Aviator Study - Smoking history correlates of selected physiological, biochemical, and anthropometric measures
Smoking history correlates of selected physiological, biochemical, and anthropometric measure
Large-Scale Structure in Brane-Induced Gravity II. Numerical Simulations
We use N-body simulations to study the nonlinear structure formation in
brane-induced gravity, developing a new method that requires alternate use of
Fast Fourier Transforms and relaxation. This enables us to compute the
nonlinear matter power spectrum and bispectrum, the halo mass function, and the
halo bias. From the simulation results, we confirm the expectations based on
analytic arguments that the Vainshtein mechanism does operate as anticipated,
with the density power spectrum approaching that of standard gravity within a
modified background evolution in the nonlinear regime. The transition is very
broad and there is no well defined Vainshtein scale, but roughly this
corresponds to k_*~ 2 at redshift z=1 and k_*~ 1 at z=0. We checked that while
extrinsic curvature fluctuations go nonlinear, and the dynamics of the
brane-bending mode C receives important nonlinear corrections, this mode does
get suppressed compared to density perturbations, effectively decoupling from
the standard gravity sector. At the same time, there is no violation of the
weak field limit for metric perturbations associated with C. We find good
agreement between our measurements and the predictions for the nonlinear power
spectrum presented in paper I, that rely on a renormalization of the linear
spectrum due to nonlinearities in the modified gravity sector. A similar
prediction for the mass function shows the right trends. Our simulations also
confirm the induced change in the bispectrum configuration dependence predicted
in paper I.Comment: 19 pages, 13 figures. v2: corrected typos, added more simulations,
better test of predictions in large mass regime. v3: minor changes, published
versio
An easy proof of Jensen's theorem on the uniqueness of infinity harmonic functions
We present a new, easy, and elementary proof of Jensen's Theorem on the
uniqueness of infinity harmonic functions. The idea is to pass to a finite
difference equation by taking maximums and minimums over small balls.Comment: 4 pages; comments added, proof simplifie
The Thousand Aviator Study - Distributions and intercorrelations of selected variables
Distributions and intercorrelations of 100 variables selected from physiological, personal history, and psychological measures of 1963 evaluation in Pensacola thousand aviator stud
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