The Space of Reception: Framing Autonomy and Collaboration

In this paper we analyse the ideas implicit in the style of exhibition favoured by contemporary galleries and museums, and argue that unless the audience is empowered to ascribe meaning and significance to artwork through critical dialogue, the power not only of the audience is undermined but also of art. We argue that galleries and museums preside over an experience economy devoid of art, unless (i) indeterminacy is understood, (ii) the critical rather than coercive nature of art is facilitated, and (iii) the conditions for inter-subjectivity are met

Conditional phase shifts using trapped atoms

We describe a scheme for producing conditional nonlinear phase shifts on two-photon optical fields using an interaction with one or more ancilla two-level atomic systems. The conditional field state transformations are induced by using high efficiency fluorescence shelving measurements on the atomic ancilla. The scheme can be nearly deterministic and is of obvious benefit for quantum information applications

A participatory action research study of key account management changes

Pure Participatory Action Research projects in the IMP research tradition are rather rare. This paper describes both the process and the outcomes of such a project carried out for a major business to retail firm in the UK. The issue at hand was, and is, Key Account Management, defined in a very broad way. The process is one of changing the ways in which the actors in the firm at different levels work together to try to coordinate the long term strategy and short term operations in relation to powerful retail customers. The outcomes for the firm have, so far, been very positive. The outcomes for the researchers are too early to fully evaluate but look very promising

Research on computational and display requirements for human control of space vehicle boosters. Part I - Theory and results Final report, 1 Mar. - 31 Aug. 1967

Optimization study of computation and display requirements for human control of reusable orbital transport ascen

Critical decay index at the onset of solar eruptions

Magnetic flux ropes are topological structures consisting of twisted magnetic field lines that globally wrap around an axis. The torus instability model predicts that a magnetic flux rope of major radius $R$ undergoes an eruption when its axis reaches a location where the decay index $-d(\ln B_{ex})/d(\ln R)$ of the ambient magnetic field $B_{ex}$ is larger than a critical value. In the current-wire model, the critical value depends on the thickness and time-evolution of the current channel. We use magneto-hydrodynamic (MHD) simulations to investigate if the critical value of the decay index at the onset of the eruption is affected by the magnetic flux rope's internal current profile and/or by the particular pre-eruptive photospheric dynamics. The evolution of an asymmetric, bipolar active region is driven by applying different classes of photospheric motions. We find that the critical value of the decay index at the onset of the eruption is not significantly affected by either the pre-eruptive photospheric evolution of the active region or by the resulting different magnetic flux ropes. As in the case of the current-wire model, we find that there is a `critical range' $[1.3-1.5]$, rather than a `critical value' for the onset of the torus instability. This range is in good agreement with the predictions of the current-wire model, despite the inclusion of line-tying effects and the occurrence of tether-cutting magnetic reconnection.Comment: 15 pages, 9 figures. To appear in The Astrophysical Journa

Signatures of the Pair-Coherent State

We explore in detail the possibility of generating a pair-coherent state in the non-degenerate parametric oscillator when decoherence is included. Such states are predicted in the transient regime in parametric oscillation where the pump mode is adiabatically eliminated. Two specific signatures are examined to indicate whether the state of interest has been generated, the Schrodinger cat state - like signatures, and the fidelity. Solutions in a transient regime reveal interference fringes which are indicative of the formation of a Schrodinger cat state. The fidelity indicates the purity of our prepared state compared to the ideal pair-coherent state.Comment: Figures hacked down to size for serve