Quantum-implemented selective reconstruction of high-resolution images

This paper proposes quantum image reconstruction. Input-triggered selection of an image among many stored ones, and its reconstruction if the input is occluded or noisy, has been simulated by a computer program implementable in a real quantum-physical system. It is based on the Hopfield associative net; the quantum-wave implementation bases on holography. The main limitations of the classical Hopfield net are much reduced with the new, original -- quantum-optical -- implementation. Image resolution can be almost arbitrarily increased.Comment: 4 pages, 15 figures, essential

Falls from height : risk perception of ladder users within the UK construction industry

Accidents involving falls from portable ladders occur at a rate of forty per week in the construction industry. Ladders are so common that they are taken for granted and the perceived risks are often under-estimated. The purpose of this study was to analyse the risk perception of operatives using portable ladders, and to develop and test a ladder-use training aid. The research used a quantitative, within-subjects survey, consisting of three structured questionnaires administered to four hundred respondents attending construction related training programmes. The surveys used images of actual ladder-use situations, and were carried out in two stages; the first stage measured the level of risk perception and sensation seeking before any training had taken place, and the second measured any change in the level of risk perception following the use of the ladder training-aid. Initial pre-training results revealed that operatives over-estimated the risks from high-level ladder use situations, and underestimated the risks from low-level ladder use situations. Post-training results showed an improvement in risk perception, especially for low-level situations. It was concluded that risk perception varies both with the individual and their level of experience, and that the training-aid had a positive impact on the improvement of ladder-use risk perception. Keywords: Falls, ladder, risk perception, training aid

Nuclear transport models can reproduce charged-particle-inclusive measurements but are not strongly constrained by them

Nuclear transport models are important tools for interpretation of many heavy-ion experiments and are essential in efforts to probe the nuclear equation of state. In order to fulfill these roles, the model predictions should at least agree with observed single-particle-inclusive momentum spectra; however, this agreement has recently been questioned. The present work compares the Vlasov-Uehling-Uhlenbeck model to data for mass-symmetric systems ranging from 12C+12C to 139La+139La, and we find good agreement within experimental uncertainties at 0.4A and 0.8A GeV. For currently available data, these uncertainties are too large to permit effective nucleon-nucleon scattering cross sections in the nuclear medium to be extracted at a useful level of precision

Digital Geoscience Spatial Model (DGSM) programme 2000-2005 : report on mid-term review

The DGSM Mid-term Review Report was compiled in December 2002 for the information of the Natural Environment Research Council, the funding agency of the project. As it was not written as a BGS Internal Report, it had no natural home for its preservation. In order to achieve that, the text has been moved verbatim into the appropriate BGS Report template and some adjustments have been the formatting to comply with extant standards. Original versions are available from NERC

Nocturnal nitrogen oxides at a rural mountain-site in south-western Germany

A new, two-channel instrument for simultaneous NO3 and N2O5 monitoring was used to make the first comprehensive set of nocturnal NOx measurements (NO, NO2, NO3 and N2O5) at the Taunus Observatory, a rural mountain site (Kleiner Feldberg) in South-western Germany. In May 2008, NO3 and N2O5 mixing ratios were well above the instrumental detection limit (a few ppt) on all nights of the campaign and were characterised by large variability. The concentrations of NO3, N2O5 and NO2 were consistent with the equilibrium constant, K2, defining the rates of formation and thermal dissociation of N2O5. A steady-state lifetime analysis is consistent with the loss of nocturnal NOx being dominated by the reaction of NO3 with volatile organic compounds in this forested region, with N2O5 uptake to aerosols of secondary importance. Analysis of a limited dataset obtained at high relative humidity indicated that the loss of N2O5 by reaction with water vapour is less efficient (>factor 3) than derived using laboratory kinetic data. The fraction of NOx present as NO3 and N2O5 reached ~20% on some nights, with night-time losses of NOx competing with daytime losses

Liquid chromatography–mass spectrometry analysis of cationic aniline dyes from the Technical University of Dresden Historical Collection of Dyes

Open Access via the Jisc Sage Agreement Acknowledgements We are grateful to Prof. Dr. Horst Hartmann of the Historische Farbstoffsammlung, Technische Universität Dresden and to the Chandler museum, New York, for samples to analyse. Declaration of conflicting interests The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article. Funding The author(s) received no financial support for the research, authorship, and/or publication of this article.Peer reviewedPublisher PD