116 research outputs found
Women, violence and the Internet
This article explores a hypothesis that the Internet and the World Wide Web form an alternative resource to that provided by conventional adult education providers. The example used is the dissemination and transfer of information on and analysis of issues concerning women and violence. Four important issues for adult (that is, post-compulsory) education are choice, appropriateness and quality of provision, access and participation, and the wider benefits of learning, including the social. This article raises these issues through giving an overview of the use made by women of the Internet, with specific reference to women and violence, based on an analysis of web pages in the English language and registered on the Google search engine
Could thermal fluctuations seed cosmic structure?
We examine the possibility that thermal, rather than quantum, fluctuations
are responsible for seeding the structure of our universe. We find that while
the thermalization condition leads to nearly Gaussian statistics, a
Harrisson-Zeldovich spectrum for the primordial fluctuations can only be
achieved in very special circumstances. These depend on whether the universe
gets hotter or colder in time, while the modes are leaving the horizon. In the
latter case we find a no-go theorem which can only be avoided if the
fundamental degrees of freedom are not particle-like, such as in string gases
near the Hagedorn phase transition. The former case is less forbidding, and we
suggest two potentially successful ``warming universe'' scenarios. One makes
use of the Phoenix universe, the other of ``phantom'' matter.Comment: minor corrections made, references added, matches the version
accepted to PR
Bianchi Type I Cosmology in Generalized Saez-Ballester Theory via Noether Gauge Symmetry
In this paper, we investigate the generalized Saez-Ballester scalar-tensor
theory of gravity via Noether gauge symmetry (NGS) in the background of Bianchi
type I cosmological spacetime. We start with the Lagrangian of our model and
calculate its gauge symmetries and corresponding invariant quantities. We
obtain the potential function for the scalar field in the exponential form. For
all the symmetries obtained, we determine the gauge functions corresponding to
each gauge symmmetry which include constant and dynamic gauge. We discuss
cosmological implications of our model and show that it is compatible with the
observational data.Comment: 13 pages, 2 figures, accepted for publication in 'European Physical
Journal C
Quintessence and variation of the fine structure constant in the CMBR
We study dependence of the CMB temperature anisotropy spectrum on the value
of the fine structure constant and the equation of state of the dark
energy component of the total density of the universe. We find that bounds
imposed on the variation of from the analysis of currently available
CMB data sets can be significantly relaxed if one also allows for a change in
the equation of state.Comment: 5 pages, 3 figures. Several references added and a few minor typos
corrected in the revised versio
Analytically Solvable Asymptotic Model of Atrial Excitability
We report a three-variable simplified model of excitation fronts in human
atrial tissue. The model is derived by novel asymptotic techniques \new{from
the biophysically realistic model of Courtemanche et al (1998) in extension of
our previous similar models. An iterative analytical solution of the model is
presented which is in excellent quantitative agreement with the realistic
model. It opens new possibilities for analytical studies as well as for
efficient numerical simulation of this and other cardiac models of similar
structure
Global perspectives on observing ocean boundary current systems
Ocean boundary current systems are key components of the climate system, are home to highly productive ecosystems, and have numerous societal impacts. Establishment of a global network of boundary current observing systems is a critical part of ongoing development of the Global Ocean Observing System. The characteristics of boundary current systems are reviewed, focusing on scientific and societal motivations for sustained observing. Techniques currently used to observe boundary current systems are reviewed, followed by a census of the current state of boundary current observing systems globally. Next steps in the development of boundary current observing systems are considered, leading to several specific recommendations
Assessing biomass based on canopy height profiles using airborne laser scanning data in eucalypt plantations
This study aimed to map the stem biomass of an even-aged eucalyptus plantation in southeastern Brazil based on canopy height profile (CHPs) statistics using wall-to-wall discrete return airborne laser scanning (ALS), and compare the results with alternative maps generated by ordinary kriging interpolation from field-derived measurements. The assessment of stem biomass with ALS data was carried out using regression analysis methods. Initially, CHPs were determined to express the distribution of laser point heights in the ALS cloud for each sample plot. The probability density function (pdf) used was the Weibull distribution, with two parameters that in a secondary task, were used as explanatory variables to model stem biomass. ALS metrics such as height percentiles, dispersion of heights, and proportion of points were also investigated. A simple linear regression model of stem biomass as a function of the Weibull scale parameter showed high correlation (adj.R2 = 0.89). The alternative model considering the 30th percentile and the Weibull shape parameter slightly improved the quality of the estimation (adj.R2 = 0.93). Stem biomass maps based on the Weibull scale parameter doubled the accuracy of the ordinary kriging approach (relative root mean square error = 6 % and 13 %, respectively)
Mouse Chromosome 3
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/46995/1/335_2004_Article_BF00648421.pd
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