99,894 research outputs found
The Influence of Religion and Ethnonationalism on Public Attitudes towards Amnesty : Northern Ireland as a Case Study
The 2011 Northern Ireland Social and Political Attitudes Survey was collected by John D. Brewer and Bernadette C. Hayes and was funded by the Leverhulme Trust under the Compromise After Conflict Programme (Grant no. F/00/152/AK).Peer reviewedPostprin
Quantum tomography for collider physics: Illustrations with lepton pair production
Quantum tomography is a method to experimentally extract all that is
observable about a quantum mechanical system. We introduce quantum tomography
to collider physics with the illustration of the angular distribution of lepton
pairs. The tomographic method bypasses much of the field-theoretic formalism to
concentrate on what can be observed with experimental data, and how to
characterize the data. We provide a practical, experimentally-driven guide to
model-independent analysis using density matrices at every step. Comparison
with traditional methods of analyzing angular correlations of inclusive
reactions finds many advantages in the tomographic method, which include
manifest Lorentz covariance, direct incorporation of positivity constraints,
exhaustively complete polarization information, and new invariants free from
frame conventions. For example, experimental data can determine the
of the production process, which is a
model-independent invariant that measures the degree of coherence of the
subprocess. We give reproducible numerical examples and provide a supplemental
standalone computer code that implements the procedure. We also highlight a
property of that guarantees in a least-squares type fit
that a local minimum of a statistic will be a global minimum: There
are no isolated local minima. This property with an automated implementation of
positivity promises to mitigate issues relating to multiple minima and
convention-dependence that have been problematic in previous work on angular
distributions.Comment: 25 pages, 3 figure
Heavy sterile neutrino in dark matter searches
Sterile neutrinos are possible dark matter candidates. We examine here
possible detection mechanisms, assuming that the neutrino has a mass of about
50 keV and couples to the ordinary neutrino. Even though this neutrino is quite
heavy, it is non relativistic with a maximum kinetic energy of 0.1 eV. Thus new
experimental techniques are required for its detection. We estimate the
expected event rate in the following cases: i) Measure electron recoils in the
case of materials with very low electron binding. ii) Low temperature crystal
bolometers. iii) Spin induced atomic excitations at very low temperatures,
leading to a characteristic photon spectrum. iv) Observation of resonances in
antineutrino absorption by a nucleus undergoing electron capture. v) Neutrino
induced electron events beyond the end point energy of beta decaying systems,
e.g. in the tritium decay studied by KATRIN.Comment: 17 pages, 8 figures ; revised figures, corrected typos, additional
comments ; results unchange
Renovation of Nitrogenous Wastewater Via Land Application
Removal of inorganic and organic nitrogen from wastewater prior to recharge of ground and surface waters can be accomplished by judicious land application. This study focused attention upon the feasibility of using sprinkler irrigation as the wastewater delivery system with coastal bermudagrass (Cynodon dactylon L.,var. coastal) pasture as the wastewater sink. One site was located on a Sawyer soil near El Dorado, while the other was located on a Savannah soil near Malvern. This report is limited to the renovation of surface waters. Results revealed that nitrogen concentration in runoff water from rainfall was substantially less than nitrogen concentration of the wastewater applied to the soil and similar to background levels. Such results support the consideration of land application as a viable wastewater disposal method
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