17 research outputs found
Local Constraints on the Oscillating G Model
We analyze the observational constraints on the effective Brans-Dicke
parameter and on the temporal variation of the effective gravitational constant
within the context of the oscillating G model, a cosmological model based on a
massive scalar field non-minimally coupled to gravity. We show that these local
constraints cannot be satisfied simultaneously once the values of the free
parameters entering the model become fixed by the global attributes of our
Universe. In particular, we show that the lower observational bound for the
effective Brans-Dicke parameter and the upper bound of the variation of the
effective gravitational constant lead to a specific value of the oscillation
amplitude which lies well below the value required to explain the periodicity
of 128 Mpc h^{-1} in the galaxy distribution observed in the pencil beam
surveys.Comment: PRD, subm., 12 pages, 1 figur
Hadronic contributions to of the leptons and to the effective fine structure constant
The hadronic contributions to the anomalous magnetic moments of the leptons
and to the effective fine structure constant at the Z-mass are reevaluated
using all presently available data.Comment: 36 pages, 11 Postscript figures, available at
ftp://129.129.40.58/pub/preprints/vapogm2.ps.g
Statistical strategies for avoiding false discoveries in metabolomics and related experiments
A functional genomics strategy that uses metabolome data to reveal the phenotype of silent mutations.
Effects of inbreeding on population mean performance and observational variances in Eucalyptus globulus
Mean performance and variances were studied in self (SELF), open pollinated (OP) and unrelated polymix (POL) crosses of common parentage in Eucalyptus globulus. • Inbreeding depression for survival (SURV) and basal area per hectare (BAH) was the highest reported for a SELF eucalypt population, increasing with age to reach 74 and 77%, respectively, over 10 years. • Inbreeding depression in the OP was 36% for SURV and 32% for BAH at age 10 years, and estimates of outcrossing rate from BAH were stable across ages, averaging 0.56. In contrast, OP inbreeding depression for stem diameter (DBH) of survivors decreased with age and few selfs appeared to survive to 10 years. • There was more variation in DBH between and within SELF than POL families, with variance ratios consistent with rare and partially recessive deleterious alleles causing inbreeding depression. • The OP variances were initially more similar to the SELF population but converged to the POL population after 10 years. • It is argued that when outcrossing rates are low, as in the present case, inbreeding depression will be a significant force countering local adaptation in forest trees