103 research outputs found
Apprenticeship for 'Liquid Life': Learning in Contingent Work Conditions for Contingent Employment
Taking the distinction between the Institution of Apprenticeship, that is, the social partnership arrangements which underpin its organisation, and Apprenticeship as a Social Model of Learning, in other words, he configuration of pedagogic and occupational etc. dimensions which constitute the model, as its starting point the paper: (i) argues the emergence of de-centred, distributed and discontinuous conditions associated with project-work present challenges for extant ideas about apprenticeship as a social model of learning; (ii) explores this claim in relation to Fuller and Unwin’s four inter-connected dimensions of apprenticeship as a social model of learning by considering a case study of apprenticeship designed to prepare apprentices to work in the above conditions; (iii) relates issues arising from the case study to research on project work from the fields of Organisational and Cultural Studies; and (iv) based on this evidence base introduces a typology of ‘Apprenticeship for Liquid Life’
'It's not like a normal 9 to 5!': the learning journeys of media production apprentices in distributed working conditions
An apprenticeship in media production in England is at the centre of this case study exploration. The context is exemplified by the organisation of the process of production around project teams and the development of project-based working cultures. Given these developments, the working conditions and learning opportunities presented to apprentices can be characterised as de-centred and distributed. This contrasts with the characterisation of apprentices’ learning as novices who develop expertise in stable, well-bounded vocational communities. Through an analysis of young apprentices’ journeys, we argue that despite the challenges presented, the case study exemplifies the extent to which the apprenticeship is capable of innovation in project working as opposed to full employment conditions. Through its focus on media apprentices’ journeys, this paper makes visible the specific experience of learning in project working, distributed and de-centred working conditions. We conclude by referring to an ideal typical conception of the model of learning underpinning the apprenticeship which may be useful as an heuristic tool for others involved in designing and/or researching apprenticeships in project working conditions
Unitarity and the Bethe-Salpeter Equation
We investigate the relation between different three-dimensional reductions of
the Bethe-Salpeter equation and the analytic structure of the resultant
amplitudes in the energy plane. This correlation is studied for both the
interaction Lagrangian and the system with -, -,
and -channel pole diagrams as driving terms. We observe that the equal-time
equation, which includes some of the three-body unitarity cuts, gives the best
agreement with the Bethe-Salpeter result. This is followed by other 3-D
approximations that have less of the analytic structure.Comment: 17 pages, 8 figures; RevTeX. Version accepted for publication in
Phys. Rev.
Restoration of rotational invariance of bound states on the light front
We study bound states in a model with scalar nucleons interacting via an
exchanged scalar meson using the Hamiltonian formalism on the light front. In
this approach manifest rotational invariance is broken when the Fock space is
truncated. By considering an effective Hamiltonian that takes into account two
meson exchanges, we find that this breaking of rotational invariance is
decreased from that which occurs when only one meson exchange is included. The
best improvement occurs when the states are weakly bound.Comment: 20 pages, 6 figures, uses feynMF; changed typos, clarified use of
angular momentu
Role of retardation in 3-D relativistic equations
Equal-time Green's function is used to derive a three-dimensional integral
equation from the Bethe-Salpeter equation. The resultant equation, in the
absence of anti-particles, is identical to the use of time-ordered diagrams,
and has been used within the framework of coupling to study the
role of energy dependence and non-locality when the two-body potential is the
sum of -exchange and crossed exchange. The results show that
non-locality and energy dependence make a substantial contribution to both the
on-shell and off-shell amplitudes.Comment: 17 pages, RevTeX; 8 figures. Accepted for publication in Phys. Rev.
C56 (Nov. 97
Compton scattering on the nucleon at intermediate energies and polarizabilities in a microscopic model
A microscopic calculation of Compton scattering on the nucleon is presented
which encompasses the lowest energies -- yielding nucleon polarizabilities --
and extends to energies of the order of 600 MeV. We have used the covariant
"Dressed K-Matrix Model" obeying the symmetry properties which are appropriate
in the different energy regimes. In particular, crossing symmetry, gauge
invariance and unitarity are satisfied. The extent of violation of analyticity
(causality) is used as an expansion parameter.Comment: 35 pages, 15 figures, using REVTeX. Modified version to be published
in Phys. Rev. C, more extensive comparison with data for Compton scattering,
all results unchange
Land beneficiaries as game farmers: conservation, land reform and the invention of the 'community game farm' in KwaZulu-Natal
Scholarship on post-apartheid land reform includes research on land claims made to formal protected areas, such as national parks and state game reserves. Little attention has however, been paid to the question of land restitution claims on private lands, on which a range of nominally ‘conservation-friendly’ land-uses (including commercial hunting) have taken place. This article traces the emergence of the ‘community game farm’ as a product of land reform processes affecting freehold land in the midlands of KwaZulu-Natal province, South Africa. Two groups of land beneficiaries who were granted title to former privately owned game farms used for leisure hunting are studied in detail. The article shows that a range of state and private actors, as well as traditional authorities, have worked to ensure the continuation of the land under conservation or game farming after transfer. The central argument is that in this process, a generic narrative is imposed which works to conflate or deny the distinct historical identities of the beneficiary groups. The article raises questions about the real efficacy of land restitution in this context, as well as the appropriateness of a community-based conservation narrative when applied in the context of small farms such as those considered here.International Bibliography of Social Science
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