113,593 research outputs found
Recommended from our members
Off the record?: Arrestee concerns about the manipulation, modification, and misrepresentation of police body-worn camera footage
Police body-worn cameras (BWC) have become the latest technological device introduced to policing on a wave of panacean promises. Recent research has reported the perspectives of police officers, police management, and the general public, but there have been no studies examining the views of police arrestees. Remedying this significant omission, this article presents findings generated from interviews with 907 individuals shortly after their arrest. Overall, we report a strong in principle support for police body-worn cameras amongst this cohort, particularly if the cameras can be operated impartially. The findings are organised into a trilogy of prominent and interrelated concerns voiced by the police detainees, namely the potential for the manipulation, modification, and misrepresentation of events captured by police body-worn cameras. The findings are discussed in a broader context of the “new visibility” of police encounters and contribute much needed findings to understand the culturally specific ways in which different publics experience and respond to visual surveillance
Community-based development of multiple-use marine protected areas: promoting dtewardship and sharing responsibility for conservation in the San Andres Archipelago, Colombia
Queen Conch ranching and educational outreach as part of the Seaflower Biosphere Reserve, Colombia
Messages of Individualism in French, Spanish, and American Television Advertising
Individualism is a central value in French, Spanish, and American cultures. However, what it means to be an individual and how this is expressed varies among cultures. This study explores the ways that television advertising reflects individualism in French, Spanish, and American cultures and uses a qualitative approach that allows coding categories to emerge from the three countries\u27 samples rather than imposing previously defined categories from a single culture. The study identifies six main advertising message strategies across the three cultures: the Efficient Individual, the Sensual Individual, the Attractive/Healthy Individual, the Esteemed Individual, the Performant(e) Individual, and the Intellectual Individual. The six strategies vary in frequency with some claims used more than others. Differences within cultures are also identified and implications for the issues of standardization and specialization are discussed
The Clumpiness of Cold Dark Matter: Implications for the Annihilation Signal
We examine the expected signal from annihilation events in realistic cold
dark matter halos. If the WIMP is a neutralino, with an annihilation
cross-section predicted in minimal SUSY models for the lightest stable relic
particle, the central cusps and dense substructure seen in simulated halos may
produce a substantial flux of energetic gamma rays. We derive expressions for
the relative flux from such events in simple halos with various density
profiles, and use these to calculate the relative flux produced within a large
volume as a function of redshift. This flux peaks when the first halos
collapse, but then declines as small halos merge into larger systems of lower
density. Simulations show that halos contain a substantial amount of dense
substructure, left over from the incomplete disruption of smaller halos as they
merge together. We calculate the contribution to the flux due to this
substructure, and show that it can increase the annihilation signal
substantially. Overall, the present-day flux from annihilation events may be an
order of magnitude larger than predicted by previous calculations. We discuss
the implications of these results for current and future gamma-ray experiments.Comment: 8 pages, 6 figures; submitted to MNRA
Forcing nonperiodicity with a single tile
An aperiodic prototile is a shape for which infinitely many copies can be
arranged to fill Euclidean space completely with no overlaps, but not in a
periodic pattern. Tiling theorists refer to such a prototile as an "einstein"
(a German pun on "one stone"). The possible existence of an einstein has been
pondered ever since Berger's discovery of large set of prototiles that in
combination can tile the plane only in a nonperiodic way. In this article we
review and clarify some features of a prototile we recently introduced that is
an einstein according to a reasonable definition. [This abstract does not
appear in the published article.]Comment: 18 pages, 10 figures. This article has been substantially revised and
accepted for publication in the Mathematical Intelligencer and is scheduled
to appear in Vol 33. Citations to and quotations from this work should
reference that publication. If you cite this work, please check that the
published form contains precisely the material to which you intend to refe
A fast and robust approach to long-distance quantum communication with atomic ensembles
Quantum repeaters create long-distance entanglement between quantum systems
while overcoming difficulties such as the attenuation of single photons in a
fiber. Recently, an implementation of a repeater protocol based on single
qubits in atomic ensembles and linear optics has been proposed [Nature 414, 413
(2001)]. Motivated by rapid experimental progress towards implementing that
protocol, here we develop a more efficient scheme compatible with active
purification of arbitrary errors. Using similar resources as the earlier
protocol, our approach intrinsically purifies leakage out of the logical
subspace and all errors within the logical subspace, leading to greatly
improved performance in the presence of experimental inefficiencies. Our
analysis indicates that our scheme could generate approximately one pair per 3
minutes over 1280 km distance with fidelity (F>78%) sufficient to violate
Bell's inequality.Comment: 10 pages, 4 figures, 5 tables (Two appendixes are added to justify
two claims used in the maintext.
Phase space polarization and the topological string: a case study
We review and elaborate on our discussion in hep-th/0606112 on the interplay
between the target space and the worldsheet description of the open topological
string partition function, for the example of the conifold. We discuss the
appropriate phase space and canonical form for the system. We find a map
between choices of polarization and the worldsheet description, based on which
we study the behavior of the partition function under canonical
transformations.Comment: 18 pages, invited review for MPL
- …