10,493 research outputs found
Achieving dietary recommendations and reducing greenhouse gas emissions : modelling diets to minimise the change from current intakes
Acknowledgements We are grateful to Mr Hubert Ehlert for extending the work on the coding for the linear programming and to Mrs Jennifer Loe for preparing the dataset matching the food consumption data with the GHGE data. Funding This work was supported as part of the research programme funded by the Scottish Government Rural and Environment Science and Analytical Services Division [RESAS].Peer reviewedPublisher PD
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A study of the impact on academic grades, attendance, and suspension behaviors of students referred to an alternative school in a suburban community.
Optical Spectroscopy of Galactic Cirrus Clouds: Extended Red Emission in the Diffuse Interstellar Medium
We present initial results from the first optical spectroscopic survey of
high latitude Galactic cirrus clouds. The observed shape of the cirrus spectrum
does not agree with that of scattered ambient Galactic starlight. This mismatch
can be explained by the presence of Extended Red Emission (ERE) in the diffuse
interstellar medium, as found in many other astronomical objects, probably
caused by photoluminescence of hydrocarbons. The integrated ERE intensity,
I_ERE \approx 1.2 x 10^{-5} erg s^{-1} cm^{-2} sr^{-1}, is roughly a third of
the scattered light intensity, consistent with recent color measurements of
diffuse Galactic light. The peak of the cirrus ERE (lambda_{0} \sim 6000 AA) is
shifted towards short (bluer) wavelengths compared to the ERE in sources
excited by intense ultraviolet radiation, such as HII regions (lambda_{0} sim
8000 AA); such a trend is seen in laboratory experiments on hydrogenated
amorphous carbon films.Comment: 7 pages, 2 figures. Accepted for publication in ApJ Letter
Dirac neutrino mass from the beta decay end-point modified by the dynamics of a Lorentz-violating equation of motion
Using a generalized procedure for obtaining the equation of motion of a
propagating fermionic particle, we examine previous claims for a lightlike
preferred axis embedded in the framework of Lorentz-invariance violation with
preserved algebra. In a high energy scale, the corresponding equation of motion
is reduced to a conserving lepton number chiral (VSR) equation, and in a low
energy scale, the Dirac equation for a free is recovered. The new dynamics
introduces some novel ingredients (modified cross section) to the phenomenology
of the tritium beta decay end-point.Comment: 11 pages, 4 figure
High resolution observations of friction-induced oxide and its interaction with the worn surface
A detailed transmission electron microscopy study of oxide and oxygen-containing phase formation during the sliding wear of metals, composites and coatings is provided. A wide range of different materials types are reported in order to compare and contrast their oxidational wear behaviour: a low carbon stainless steel, a H21 tool steel containing 7%TiC particles, a 17%Cr white iron,an AlâSi/30%SiC composite, an Alâalloy (6092)â15%Ni3Al composite and finally a 3rd generation TiAlN/CrN âsuperhardâ multilayer coating. For the ferrous alloys, nanoscale oxides and oxygen-containing phases were formed that exhibited excellent adhesion to the substrate. In all cases, an increase in oxide coverage of the surface was associated with a decrease in Lancaster wear coefficient. The oxide at the surface of the 316L and H21+7%TiC was found to deform with the substrate, forming a mechanically mixed layer that enhanced surface wear resistance. Evidence of oxidational wear is presented for the wear of the AlâSiâ30%SiC composite, but this did not give a beneficial effect in wear, a result of the brittle nature of the oxide that resulted in detachment of fine (150nm) thick fragments. The worn surface of the Alâalloy (6092)â15%Ni3Al and TiAlN/CrN coating was characterized by reaction with the counterface and subsequent oxidation, the product of which enhanced wear resistance. The observations are related to the classical theory of oxidational wear
The iron cage of the profession: a critique on closure in the Australian accounting profession
This paper seeks to contribute to the literature on the process of closure that occurs within the constructs of professions. The discussion in this paper focuses on the professional accounting bodies in Australia and how they have devolved a form of bureaucratic control over the education process through the credentialing of membership and accreditation of accounting degrees. Weber\u27s theory of bureaucracy in conjunction with Closure theory provide the framework upon which this critique is drawn. Implicit in the regulatory role of the accounting bodies is the justification of the practice of accounting and the status of the members of the professional bodies. Once those within the professional associations accept the right of the professional bodies to determine the educational requirements for membership along with the practice of accreditation of curriculum forms the iron cage. The practice of accreditation and credentialing exists in other disciplines such as medicine, engineering and law so that there exists parallels for claiming a legitimate basis for the intervention of the professional accounting bodies
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