5,292 research outputs found
The Intellectual Womanâs Cage: Complicating Ideals of Fanonâs âNative Intellectualâ in Nervous Conditions
This paper examinesâthrough a post-colonial lensâ Tsitsi Dangarembgaâs novel Nervous Conditions. In particular, this paper analyzes the characters of Tambu, Nyasha, and Maiguru and how their Western education allows them to fit into their roles as ânative intellectuals.â Imposing Franz Fanonâs phases of becoming a ânative intellectualâ onto these strong, educated female characters greatly complicates his term and process. The idea of the native intellectual is most often applied to men. However, in terms of Dangarembgaâs work, it is the female characters that rise to this title. In this acquisition of education the female characters are truly âbetween two worldsâ as they battle both the colonizing culture and the intense patriarchy of their own
Commuting charges and symmetric spaces
Every classical sigma-model with target space a compact symmetric space
(with classical) is shown to possess infinitely many local, commuting,
conserved charges which can be written in closed form. The spins of these
charges run over a characteristic set of values, playing the role of exponents
of , and repeating modulo an integer which plays the role of a Coxeter
number.Comment: LaTeX, 16 pages; v2: footnote adde
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What I did on my vacation: spatio-temporal log analysis with interactive graphics and morphometric surface derivative
Two monopoles of one type and one of another
The metric on the moduli space of charge (2,1) SU(3)
Bogomolny-Prasad-Sommerfield monopoles is calculated and investigated. The
hyperKahler quotient construction is used to provide an alternative derivation
of the metric. Various properties of the metric are derived using the
hyperKahler quotient construction and the correspondence between BPS monopoles
and rational maps. Several interesting limits of the metric are also
considered.Comment: 48 pages, LaTeX, 2 figures. Typos corrected. Version in JHE
Conserved Charges and Supersymmetry in Principal Chiral Models
We report on investigations of local (and non-local) charges in bosonic and
supersymmetric principal chiral models in 1+1 dimensions. In the bosonic PCM
there is a classically conserved local charge for each symmetric invariant
tensor of the underlying group. These all commute with the non-local Yangian
charges. The algebra of the local charges amongst themselves is rather more
subtle. We give a universal formula for infinite sets of mutually commuting
local charges with spins equal to the exponents of the underlying classical
algebra modulo its Coxeter number. Many of these results extend to the
supersymmetric PCM, but with local conserved charges associated with
antisymmetric invariants in the Lie algebra. We comment briefly on the quantum
conservation of local charges in both the bosonic and super PCMs.Comment: 18 pages, LaTeX. Revised and up-dated version based on conference
talks by JME and NJ
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Visualization of uncertainty and analysis of geographical data
A team of five worked on this challenge to identify a possible criminal strucutre within the Flitter social network. Initially we worked on the problem individually, deliberately not sharing any data, results or conclusions. This maximised the chances of spotting any blunders, unjustified assumptions or inferences and allowed us to triangulate any common conclusions. After an agreed period we shared our results demonstrating the visualization applications we had built and the reasoning behind our conclusions. This sharing of assumptions encouraged us to incorporate uncertainty in our visualization approaches as it became clear that there was a number of possible interpretations of the rules and assumptions governing the challenge. This summary of the work emphasises one of those applications detailing the geographic analysis and uncertainty handling of the network data. ©2009 IEEE
Updating predictive accident models of modern rural single carriageway A-roads
Reliable predictive accident models (PAMs) are essential to design and maintain safe road networks and yet the models most commonly used in the UK were derived using data collected 20 to 30 years ago. Given that the national personal injury accident total fell by some 30% in the last 25 years, while road traffic increased by over 60%, significant errors in scheme appraisal and evaluation based on the models currently in use seem inevitable. In this paper the temporal transferability of PAMs for modern rural single carriageway A-roads is investigated and their predictive performance is evaluated against a recent data set. Despite the age of these models, the PAMs for predicting the total accidents provide a remarkably good fit to recent data and these are more accurate than models where accidents are disaggregated by type. The performance of the models can be improved by calibrating them against recent data
Enhanced star formation: The importance of bars in spiral galaxies
It was found that among an IR luminous subset of nearby spiral galaxies, nearly all of the systems with IRAS colors and luminosities indicative of enhanced star formation are barred. Radio continuum and IR spectroscopic results support the hypothesis that this emission originates within the central 2 kpc; possibly in a circumnuclear ring. It was also found that outer rings are over represented among these barred systems and suggest possible reasons for this phenomena
Invariant tensors and Casimir operators for simple compact Lie groups
The Casimir operators of a Lie algebra are in one-to-one correspondence with
the symmetric invariant tensors of the algebra. There is an infinite family of
Casimir operators whose members are expressible in terms of a number of
primitive Casimirs equal to the rank of the underlying group. A systematic
derivation is presented of a complete set of identities expressing
non-primitive symmetric tensors in terms of primitive tensors. Several examples
are given including an application to an exceptional Lie algebra.Comment: 11 pages, LaTeX, minor changes, version in J. Math. Phy
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Future of an ageing population evidence review; Developing medical fitness and wellbeing environments to maintain health and wellbeing over the lifecourse.
Background and methods
This report is derived from a review of the research evidence on physical activity interventions
and initiatives, interventions to support self-management/ self-care of long-term conditions and
digitally enabled care services and technologies. The aim was to use existing evidence to
envision future services and associated infrastructure.
The Evidence Review involved scoping the literature for topics researched and to determine the
nature of that research. Rapid-scoping review methods were applied to trusted sources, and
searches for specific key texts were conducted. A separate search was conducted to identify
literature relevant to each domain. A narrative was then produced from the review findings.
Review findings
The evidence base for physical activity interventions is growing. There has been significant
recent investment in the development and evaluation of interventions to promote activity and
reduce sedentary behaviour at the individual, community and population levels. The evidence to
link higher levels of physical activity to positive health outcomes and disease prevention is
convincing, both in âwellâ populations and in those with long-term health conditions.
Self-management interventions are heterogeneous in nature but common elements exist across
the majority of them. The consensus in the literature is that self-management will become
increasingly important due to unsustainable demands upon services. Evaluation of selfmanagement
interventions reveals a small but varying effect across a wide range of outcomes.
However, little is known about the mechanisms by which these interventions work and how
these might vary across differing conditions and populations.
Technology is being increasingly used to support service delivery in a wide range of contexts,
and for the delivery of a variety of interventions including fitness and self-management. There is
strong evidence supporting the use of technology for remote monitoring of people with longterm
conditions, but further research is required.
Implications
Digital applications are already altering established patterns of service delivery. The findings
presented here reveal varying results of efficacy which do not accord with the optimistic future
described in various envisaging reports. Research has yet to consider unwanted and
unforeseen effects of moving towards technology-enabled services. It is also important to
consider how to effectively harness new health data emerging from the use of eHealth systems,
technology-enabled services and health-tracking devices.
There is an ongoing requirement to evaluate new technologies and technology-enabled
services in ways that provide both timely and robust answers, particularly as technology
development is a continually moving target. These considerations are discussed in this report
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