58,950 research outputs found
Key issues in application of composites to transport aircraft
The application of composite materials to transport aircraft was identified and reviewed including the major contributing disciplines of design, manufacturing, and processing. Factors considered include: crashworthiness considerations (structural integrity, postcrash fires, and structural fusing), electrical/avionics subsystems integration, lightning, and P-static protection design; manufacturing development, evaluation, selection, and refining of tooling and curing procedures; and major joint design considerations. Development of the DC-10 rudder, DC-10 vertical stabilizer, and the DC-9 wing study project was reviewed. The Federal Aviation Administration interface and the effect on component design of compliance with Federal Aviation Regulation 25 Composite Guidelines are discussed
The Identity Project: in-depth case studies of Identity Management - UCL institutional audit. Final report
This report presents the results of an audit of identity management practices at UCL, as part of Work Package 2 of The Identity Project (http://www.identity-project.info), a study funded under the JISC e-infrastructure programme, to address the current practice and future needs of UK academic institutions in Identity Management.
After an introduction to the organisational context and a description of the audit methodology, the results of fifteen interviews are presented thematicall
Parasites, pawns and partners: disability research and the role of non-disabled researchers
Important methodological questions are raised by the act of researching disablement. Disability research has attracted much methodological criticism from disabled people who argue that it has taken place within an oppressive theoretical paradigm and within an oppressive set of social relations. These issues are of heightened significance for non-disabled researchers and bear many similarities to those faced by researchers investigating barriers to the social inclusion of women, Black and ‘Third World’ peoples. Such challenges have led to the development of an ‘emancipatory’ research paradigm. Six principles of emancipatory research are identified and the authors’ own research projects are critically examined within this framework. A number of contradictions are identified and an attempt made to balance the twin requirements of political action and academic rigour
FLECS: Planning with a Flexible Commitment Strategy
There has been evidence that least-commitment planners can efficiently handle
planning problems that involve difficult goal interactions. This evidence has
led to the common belief that delayed-commitment is the "best" possible
planning strategy. However, we recently found evidence that eager-commitment
planners can handle a variety of planning problems more efficiently, in
particular those with difficult operator choices. Resigned to the futility of
trying to find a universally successful planning strategy, we devised a planner
that can be used to study which domains and problems are best for which
planning strategies. In this article we introduce this new planning algorithm,
FLECS, which uses a FLExible Commitment Strategy with respect to plan-step
orderings. It is able to use any strategy from delayed-commitment to
eager-commitment. The combination of delayed and eager operator-ordering
commitments allows FLECS to take advantage of the benefits of explicitly using
a simulated execution state and reasoning about planning constraints. FLECS can
vary its commitment strategy across different problems and domains, and also
during the course of a single planning problem. FLECS represents a novel
contribution to planning in that it explicitly provides the choice of which
commitment strategy to use while planning. FLECS provides a framework to
investigate the mapping from planning domains and problems to efficient
planning strategies.Comment: See http://www.jair.org/ for an online appendix and other files
accompanying this articl
Luttinger States at the Edge
An effective wavefunction for the edge excitations in the Fractional quantum
Hall effect can be found by dimensionally reducing the bulk wavefunction.
Treated this way the Laughlin wavefunction yields a Luttinger
model ground state. We identify the edge-electron field with a Luttinger
hyper-fermion operator, and the edge electron itself with a non-backscattering
Bogoliubov quasi-particle. The edge-electron propagator may be calculated
directly from the effective wavefunction using the properties of a
one-dimensional one-component plasma, provided a prescription is adopted which
is sensitive to the extra flux attached to the electrons
Police powers and human rights in the context of terrorism
Purpose – The object of the paper is to analyse the justifications for the modification of police
powers in response to terrorist threats, placing this issue in a European context.
Design/methodology/approach – The paper consists of a critical examination of provisions
relating to terrorism emanating from the European Union and the Council of Europe (European
Convention on Human Rights (ECHR)), and the relevant English law on police powers of stop and
search, arrest, and detention.
Findings – Nothing in European law requires the amendments to police powers contained in English
law; European law requires respect for human rights, even in dealing with terrorism; a shoot-to-kill
policy is prohibited by the ECHR; and balance is an unsatisfactory method of resolving conflicts in
this area.
Research limitations/implications – The research was limited in its scope to certain areas of
police powers, and to certain fundamental European documents. Future research should consider the
issue in relation to wider areas.
Originality/value – It challenges the idea of balance between liberty and security, proposing a test
based on necessity instead
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