127,524 research outputs found
Embodying gender, age, ethnicity and power in ‘the field’: Reflections on dress and the presentation of the self in research with older Pakistani Muslims
This article is available open access through the publisher’s website at the link below. Copyright @ 2012 Sociological Research Online.In recent years, there has been an increasing interest in researching people growing older in the South Asian ethnic minority communities in the UK. However, these populations have received comparatively little attention in wide-ranging discussions on culturally and socially appropriate research methodologies. In this paper, we draw on the experiences of a young female Pakistani Muslim researcher researching older Pakistani Muslim women and men, to explore the significance of gender, age and ethnicity to fieldwork processes and 'field' relationships. In particular, we highlight the significance of dress and specific presentations of the embodied self within the research process. We do so by focusing upon three key issues: (1) Insider/Outsider boundaries and how these boundaries are continuously and actively negotiated in the field through the use of dress and specific presentations of the embodied 'self'; (2) The links between gender, age and space - more specifically, how the researcher's use of traditional Pakistani dress, and her differing research relationships, are influenced by the older Pakistani Muslim participants' gendered use of public and private space; and (3) The opportunities and vulnerabilities experienced by the researcher in the field, reinforced by her use (or otherwise) of the traditional and feminine Pakistani Muslim dress. Our research therefore highlights the role of different presentations of the embodied 'self' to fieldwork processes and relationships, and illustrates how age, gender and status intersect to produce fluctuating insider/outsider boundaries as well as different opportunities and experiences of power and vulnerability within research relationships.ESR
The Life of a Vortex Knot
The idea that the knottedness (hydrodynamic Helicity) of a fluid flow is
conserved has a long history in fluid mechanics. The quintessential example of
a knotted flow is a knotted vortex filament, however, owing to experimental
difficulties, it has not been possible until recently to directly generate
knotted vortices in real fluids. Using 3D printed hydrofoils and high-speed
laser scanning tomography, we generate vortex knots and links and measure their
subsequent evolution. In both cases, we find that the vortices deform and
stretch until a series of vortex reconnections occurs, eventually resulting
several disjoint vortex rings.
This article accompanies a fluid dynamics video entered into the Gallery of
Fluid Motion at the 66th Annual Meeting of the APS Division of Fluid Dynamics.Comment: Videos are included; this submission is part of the DFD Gallery of
Fluid Motio
Density-operator theory of orbital magnetic susceptibility in periodic insulators
The theoretical treatment of homogeneous static magnetic fields in periodic
systems is challenging, as the corresponding vector potential breaks the
translational invariance of the Hamiltonian. Based on density operators and
perturbation theory, we propose, for insulators, a periodic framework for the
treatment of magnetic fields up to arbitrary order of perturbation, similar to
widely used schemes for electric fields. The second-order term delivers a new,
remarkably simple, formulation of the macroscopic orbital magnetic
susceptibility for periodic insulators. We validate the latter expression using
a tight-binding model, analytically from the present theory and numerically
from the large-size limit of a finite cluster, with excellent numerical
agreement.Comment: 5 pages including 2 figures; accepted for publication in Phys. Rev.
A note on area variables in Regge calculus
We consider the possibility of setting up a new version of Regge calculus in
four dimensions with areas of triangles as the basic variables rather than the
edge-lengths. The difficulties and restrictions of this approach are discussed.Comment: 4 pages, amstex. Revision has minor changes and more precise
conclusion
Phase-locked loop with sideband rejecting properties Patent
Phase locked loop with sideband rejecting properties in continuous wave tracking rada
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