3,455 research outputs found
Making space for fish:The regional, network and fluid spaces of fisheries certification
In this paper, we examine the multiple spatialities of Marine Stewardship Council (MSC) certifications. The MSC uses its ecolabelling scheme to promote sustainable fisheries management; its logo may be used on the products of certified fisheries. The certification process involves the definition of a ‘fishery’. This involves the designation of boundaries around a particular location. While these boundaries suggest exclusivity for each fishery, these regional spaces are also entwined in the MSC's network, whereby they are viewed relationally. The utility of areal boundaries is also rendered problematic by the materiality of the seas: coastlines change, fish swim, water moves and ships travel. To operate its scheme successfully, the MSC has to recognise this spatial fluidity, acknowledging the rupture of boundaries and the movement of actors. We argue that attention to a multiplicity of spatialities helps direct attention to the role of non-humans in the acting out of hybrid geographies
A Look-Ahead Feature - Sow Stalls for Indiviudal Feeding
Overfeeding sows and gilts during gestation is a common mismanagement practice. Here\u27s how concrete stalls were built for individual feeding to assure a minimum, but adequate, amount of feed for each animal
Statistics of precursors to fingering processes
We present an analysis of the statistical properties of hydrodynamic field
fluctuations which reveal the existence of precursors to fingering processes.
These precursors are found to exhibit power law distributions, and these power
laws are shown to follow from spatial -Gaussian structures which are
solutions to the generalized non-linear diffusion equation.Comment: 7 pages incl. 5 figs; tp appear in Europhysics Letter
Lifting the Mood on Treating Fragile X
Only a decade ago, it was believed that a genetic diagnosis of intellectual disability and autism offered little in the way of hope for a medical treatment to lessen the burden on the affected individuals and their families. However, recent research aimed at understanding the cellular and molecular mechanisms that underlie the pathogenesis of ASD has ushered in a new era of targeted treatment strategies. Studies in fragile X syndrome (FXS) have been at the forefront of this revolution, and they are forging a path that could define future approaches to the treatment of ASD
Dynamics and stability of vortex-antivortex fronts in type II superconductors
The dynamics of vortices in type II superconductors exhibit a variety of
patterns whose origin is poorly understood. This is partly due to the
nonlinearity of the vortex mobility which gives rise to singular behavior in
the vortex densities. Such singular behavior complicates the application of
standard linear stability analysis. In this paper, as a first step towards
dealing with these dynamical phenomena, we analyze the dynamical stability of a
front between vortices and antivortices. In particular we focus on the question
of whether an instability of the vortex front can occur in the absence of a
coupling to the temperature. Borrowing ideas developed for singular bacterial
growth fronts, we perform an explicit linear stability analysis which shows
that, for sufficiently large front velocities and in the absence of coupling to
the temperature, such vortex fronts are stable even in the presence of in-plane
anisotropy. This result differs from previous conclusions drawn on the basis of
approximate calculations for stationary fronts. As our method extends to more
complicated models, which could include coupling to the temperature or to other
fields, it provides the basis for a more systematic stability analysis of
nonlinear vortex front dynamics.Comment: 13 pages, 8 figure
New Clock Comparison Searches for Lorentz and CPT Violation
We present two new measurements constraining Lorentz and CPT violation using
the Xe-129 / He-3 Zeeman maser and atomic hydrogen masers. Experimental
investigations of Lorentz and CPT symmetry provide important tests of the
framework of the standard model of particle physics and theories of gravity.
The two-species Xe-129 / He-3 Zeeman maser bounds violations of CPT and Lorentz
symmetry of the neutron at the 10^-31 GeV level. Measurements with atomic
hydrogen masers provide a clean limit of CPT and Lorentz symmetry violation of
the proton at the 10^-27 GeV level.Comment: 11 pages, 5 figures. To appear in the Proceedings of the 3rd
International Symposium on Symmetries in Subatomic Physic
Comparative analysis of the Mexican and Turkish currency crises
Author's OriginalThe study aims to explore characteristics of currency crises in emerging markets. Two recent experiences in Mexico and Turkey respectively analyzed carefully to identify common elements in the development and eruption of the crises. Results of the study suggest that there are several background factors and triggers that were consistent in both cases. Finally a discussion of the policy implications of the findings concludes the study.Aybar, C., Ajami, R., & Bear, M. (2000). Currency crises in emerging markets: A comparative analysis of the Mexican and Turkish cases. International Journal of Public Administration, 23(5-8), 963-1006
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