24,821 research outputs found
Relativistic precession of quantum elliptical states in the Coulomb potential
A special relativistic perturbation to non-relativistic quantum mechanics is
shown to lead to the special relativistic prediction for the rate of precession
for quantum states in the Coulomb potential. This behavior is shown using SO(4)
coherent states as examples. These states are localized on Kepler ellipses and
precess in the presence of a relativistic perturbation.Comment: 10 pages, 3 figures, submitted to Am.J.Phys, revised for style,
improved figure
Basic research in semiconductor detector- dosimeter characteristics, as applied to the problems of whole body dosimetry informal progress report
Lithium drifted silicon semiconductor radiation detectors, proton absorption in metal, plastics, and tissue, and detector behavio
A Framework for Assessing the Rationality of Judgments in Carcinogenicity Hazard Identification
Arguing that guidelines for identifying carcinogens now lack a philosophically rigorous framework, the authors present an alternative that draws clear attention to the process of reasoning towards judgments of carcinogenicity
Britain's fiscal squeeze: the choices ahead
The economic and financial crisis that has unfolded over the last two years has caused a dramatic deterioration in the UK's public finances, with public sector borrowing set to peak this year at a level not seen since the Second World War and public sector indebtedness set to climb to levels not seen since the late 1960s.
With the next general election less than a year away, the Government and the main opposition parties alike will be under pressure to offer more detailed proposals to repair the public finances. This note discusses some of the key questions all the parties will have to grapple with
The lone parent pilots after 12 to 24 months: an impact assessment of in-work credit, work search premium, extended schools childcare, quarterly work focused interviews and new deal plus for lone parents
From April 2004, a set of Government policies designed to help lone parents into work have been piloted in various combinations in a number of Jobcentre Plus districts in Great Britain. The five policies are: In Work Credit (IWC), Work Search Premium (WSP), Extended Schools Childcare (ESC) and Childcare Tasters, Quarterly Work Focused Interviews (QWFIs) for lone parents whose youngest child is aged 12 or over in Local Education Authorities (LEAs) in which an ESC pilot is operating (ESQWFI), and New Deal Plus for Lone Parents (ND+fLP), hereafter collectively referred to as 'the lone parent pilots' (LPPs or 'the pilots'). The pilots were rolled out in four Phases, the first three of which are analysed in this report.
This report estimates the impact of the LPPs on lone parents who have received Income Support (IS) or Jobseeker's Allowance (JSA) for at least 12 months. It uses a difference-in-differences (DiD) estimator, and makes use of lone parents in districts not operating a pilot as a comparison group. The data covers the first 12 months (Phase 3 districts) to the first 24 months (Phase 1 districts) of the pilots' operation, and so should be seen as giving the early impacts. Impacts were estimated separately for the stock of lone parents who had been on benefit for at least 12 months when the pilots began, and the flow sample of lone parents whose claim of IS/JSA reached 12 months after the pilots began
Charged particle sources for implantation and surface reactions Final report
High temperature ion source developed for implantation and surface reactions of Ar, Pb, and Ga ion
Thermotropic Nematic and Smectic Order in Silica Glass Nanochannels
Optical birefringence measurements on a rod-like liquid crystal (8OCB),
imbibed in silica channels (7 nm diameter), are presented and compared to the
thermotropic bulk behavior. The orientational and positional order of the
confined liquid evolves continuously at the paranematic-to-nematic and sizeably
broadened at the nematic-to-smectic order transition, resp., in contrast to the
discontinuous and well-defined second-order character of the bulk transitions.
A Landau-de-Gennes analysis reveals identical strengths of the nematic and
smectic ordering fields (imposed by the walls) and indicates that the smectic
order is more affected by quenched disorder (originating in channel tortuosity
and roughness) than the nematic transition.Comment: 3 pages, 4 figure
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