701 research outputs found
Exact Solution of a Linear Wave Equation in Cosmological General Relativity
A linear second order wave equation is presented based on cosmological
general relativity, which is a space-velocity theory of the expanding Universe.
The wave equation is shown to be exactly solvable, based on the Gaussian
hypergeometric function.Comment: 6 page
On the anomalous acceleration of Pioneer spacecraft
The anomalous acceleration of Pioneer 10 and 11 spacecraft of (8.74 \pm 1.33)
\times 10^{-8} cm. s^{-2} fits with a theoretical prediction of a minimal
acceleration in nature of about 7.61 \times 10^{-8} cm. s^{-2}Comment: 3 pages, accepted in Int. J. Theor. Phy
The Cosmic Time in Terms of the Redshift
In cosmology one labels the time t since the Big Bang in terms of the
redshift of light emitted at t, as we see it now. In this Note we derive a
formula that relates t to z which is valid for all redshifts. One can go back
in time as far as one wishes, but not to the Big Bang at which the redshift
tends to infinity.Comment: 3 pages, 3 figure
Einstein's Rocket Ship, the Deflection of Light and the Precession of the Orbital Perihelion
The nature of the principle of equivalence is explored. The light ray travel path in an accelerated reference frame, a rocket ship, is described and the rocket ship model is used to derive the deflection of light by a massive body. By accounting for the effect of the velocity of the accelerated observer relative to an inertial frame, the additional deflection angle is obtained due to the aberration of the light beam. This model is applied to the deflection of light by a central gravitational field, giving the total deflection angle in agreement with the standard result. Also, a novel approach is given by considering the deflection of light by a massive body to obtain the precession of the perihelion of a planet
Tackling child sexual exploitation: a study of current practice in London
This report was commissioned by London Councils and the London Safeguarding Children Board
and written by Beckett, H; Firmin, C; Hynes, P and Pearce JIn autumn 2013, London Councils commissioned a team of researchers from the University of
Bedfordshire to map current responses to child sexual exploitation (CSE) across London. This
summary report presents an overview of the key findings of the study; please refer to the full report
for further details on, and context to, the study.1
The study was conducted in October / November 2013. The findings are drawn from an in-depth
quantitative survey (completed by 30 London boroughs and local safeguarding children boards)
and eight semi-structured interviews with statutory and voluntary sector providers.
The report provides a snapshot of current responses to CSE across London, in relation to:
Local scoping of the issue;
Local policies and procedures;
Training and awareness raising;
Identification and early intervention (re. victims and perpetrators);
Responding to cases of CSE (re. victims and perpetrators); and
Overarching reflections on progress and challenges.
Although there is still much progress to be made, the report encouragingly demonstrates that
significant work is underway within this field, with pertinent learning emerging from a number of
different boroughs
Review of Pain Control Methods After an Episiotomy
In 2007, 443,000 episiotomies were performed. Because this procedure is used often, pain management after episiotomy is a priority for many women. Mothers may be reluctant to use pharmacological treatment due to the potential negative side effects to both mother and baby. Because of this concern, a number of researchers have investigated alternative methods of managing pain, particularly after episiotomies are performed. The purpose of this review is to determine the best evidence-based practice for controlling pain related to an episiotomy
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