7,559 research outputs found
Power, participation and partnership: methodological reflection on researching professional doctorate candidates' experiences of researching in the workplace
This study aimed to explore the candidate experience in order to understand more deeply aspects of the development in work based research. Delphi technique was chosen as an approach in order to capture a range of experience and data, to inform how we may best support candidates on practice based doctorates. Many such programmes include a stakeholder learning agreement between the candidate, the university and the employer organisation with the common aim to bring about transformational and sustainable change. Our research to date indicates a disparity within the agreement in the level of stakeholder participation. Where the organisation stakeholder is not fully engaged and involved in supporting the research, there is a potential threat to the effectiveness of any change outcome. Current practice based doctoral research participants were invited to relate to a range of temporal themes in their research project cycle, for example: setting up the project; implementing the project; changes/ contingency planning within the project; project completion and post completion. Of particular interest in relation to the above was the availability of resources and how they were used within the project life cycle. In this respect, resources are deemed to include, human, material, time, personal and organisational culture influence. The allocation, manipulation and distribution of such resources can be understood in terms of power relationships. The paper presents our experience and reflections from two iterative Delphi cycles and proposes a final stage of greater integration with existing academic resources within the professional doctorate programme. The study has enabled the researchers to gain a new understanding of how power may operate in a work based research project through the experience of undertaking the Delphi approach. Furthermore, by thinking about affordances of the project life cycle, it may help us to better understand needs and strategy for the curriculum in order to more effectively support candidates through their transformational learning experience. The consequences of such change might have implications for participation and power distribution within the management and leadership of doctoral work base research projects
Proton spin polarizabilities from polarized Compton scattering
Polarized Compton scattering off the proton is studied within the framework
of subtracted dispersion relations for photon energies up to 300 MeV. As a
guideline for forthcoming experiments, we focus the attention on the role of
the proton's spin polarizabilities and investigate the most favorable
conditions to extract them with a minimum of model dependence. We conclude that
a complete separation of the four spin polarizabilities is possible, at photon
energies between threshold and the region, provided one can
achieve polarization measurements with an accuracy of a few percent.Comment: 26 pages, 7 figures
Experimental observation of oscillating and interacting matter wave dark solitons
We report on the generation, subsequent oscillation and interaction of a pair
of matter wave dark solitons. These are created by releasing a Bose-Einstein
condensate from a double well potential into a harmonic trap in the crossover
regime between one dimension (1D) and three dimensions (3D). The oscillation of
the solitons is observed and the frequency is in quantitative agreement with
simulations using the Gross-Pitaevskii equation. An effective particle picture
is developed and reveals that the deviation of the observed frequencies from
the asymptotic prediction , where is the
longitudinal trapping frequency, results from the dimensionality of the system
and the interaction between the solitons.Comment: 5 pages, 3 figure
Crystal growth, structural studies and superconducting properties of beta-pyrochlore KOs2O6
Single crystals of KOs2O6 have been grown in a sealed quartz ampoule.
Detailed single crystal X-ray diffraction studies at room temperature show
Bragg peaks that violate Fd-3m symmetry. With a comparative structure
refinement the structure is identified as non-centrosymmetric (F-43m). Compared
to the ideal beta-pyrochlore lattice (Fd-3m), both Os tetrahedral and O
octahedral network exhibit breathing mode like volume changes accompanied by
strong anisotropic character of the K channels. The crystals show metallic
conductivity and a sharp transition to the superconducting state at Tc = 9.65
K. Superconducting properties have been investigated by magnetization
measurements performed in a temperature range from 2 to 12 K and in magnetic
fields from 0 to 60 kOe. The temperature dependence of the upper critical field
Hc2(T) has been determined and the initial slope (dHc2/dT)Tc = -33.3 kOe/K has
been obtained near Tc. The upper critical field at zero temperature was
estimated to be Hc2(0) \cong 230 kOe, which is a value close to the Pauli
paramagnetic limiting field Hp(0)\cong 250 kOe. Then, the Ginzburg-Landau (GL)
coherence length xi GL(0) \approx 3.8 nm was calculated, and the Maki parameter
alpha \approx \sqrt 2 was obtained, suggesting the possibility that KOs2O6
might behave unconventionally at low temperatures and high magnetic fields
Dispersive magnetic excitations in the S=1 antiferromagnet BaMnO
We present powder inelastic neutron scattering measurements of the S=1
dimerized antiferromagnet BaMnO. The K magnetic spectrum
exhibits a spin-gap of meV and a dispersive spectrum with
a bandwidth of approximately 1.5 meV. Comparison to coupled dimer models
describe the dispersion and scattering intensity accurately and determine the
exchange constants in BaMnO. The wave vector dependent scattering
intensity confirms the proposed S=1 dimer bond. Temperature dependent
measurements of the magnetic excitations indicate the presence of both
singlet-triplet and thermally activated triplet-quintet excitations.Comment: 8 pages, 8 figures, Submitted to Physical Review B, Resubmited
versio
Singlet Ground State and Magnetization Plateaus in BaMnO
Magnetic susceptibility and the magnetization process have been measured in
\green polycrystal. In this compound, the magnetic manganese ion exists as
Mn in a tetrahedral environment, and thus the magnetic interaction can
be described by an S=1 Heisenberg model. The ground state was found to be a
spin singlet with an excitation gap K. Magnetization
plateaus were observed at zero and at half of the saturation magnetization.
These results indicate that the present system can be represented by a coupled
antiferromagnetic dimer model.Comment: 4 pages, 4 figures, jpsj styl
Regulating Clothing Outwork: A Sceptic's View
By applying the strategies of international anti-sweatshop campaigns to the Australian context, recent regulations governing home-based clothing production hold retailers
responsible for policing the wages and employment conditions of clothing outworkers who manufacture clothing on their behalf. This paper argues that the new approach
oversimplifies the regulatory challenge by assuming (1) that Australian clothing production is organised in a hierarchical ‘buyer-led’ linear structure in which core
retail firms have the capacity to control their suppliers’ behaviour; (2) that firms act as unitary moral agents; and (3) that interventions imported from other times and places
are applicable to the contemporary Australian context. After considering some alternative regulatory approaches, the paper concludes that the new regulatory strategy effectively privatises responsibility for labour market conditions – a development that cries out for further debate
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