482,676 research outputs found
Reply on the ``Comment on `Loss-error compensation in quantum- state measurements' ''
The authors of the Comment [G. M. D'Ariano and C. Macchiavello to be
published in Phys. Rev. A, quant-ph/9701009] tried to reestablish a 0.5
efficiency bound for loss compensation in optical homodyne tomography. In our
reply we demonstrate that neither does such a rigorous bound exist nor is the
bound required for ruling out the state reconstruction of an individual system
[G. M. D'Ariano and H. P. Yuen, Phys. Rev. Lett. 76, 2832 (1996)].Comment: LaTex, 2 pages, 1 Figure; to be published in Physical Review
Electronic transport properties of (fluorinated) metal phthalocyanine
The magnetic and transport properties of the metal phthalocyanine (MPc) and
FMPc (M = Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn and Ag) families of
molecules in contact with S-Au wires are investigated by density functional
theory within the local density approximation, including local electronic
correlations on the central metal atom. The magnetic moments are found to be
considerably modified under fluorination. In addition, they do not depend
exclusively on the configuration of the outer electronic shell of the central
metal atom (as in isolated MPc and FMPc) but also on the interaction
with the leads. Good agreement between the calculated conductance and
experimental results is obtained. For M = Ag, a high spin filter efficiency and
conductance is observed, giving rise to a potentially high sensitivity for
chemical sensor applications.Comment: 8 pages (two-column), 8 figure
Modular Invariance on the Torus and Abelian Chern-Simons Theory
The implementation of modular invariance on the torus as a phase space at the
quantum level is discussed in a group-theoretical framework. Unlike the
classical case, at the quantum level some restrictions on the parameters of the
theory should be imposed to ensure modular invariance. Two cases must be
considered, depending on the cohomology class of the symplectic form on the
torus. If it is of integer cohomology class , then full modular invariance
is achieved at the quantum level only for those wave functions on the torus
which are periodic if is even, or antiperiodic if is odd. If the
symplectic form is of rational cohomology class , a similar result
holds --the wave functions must be either periodic or antiperiodic on a torus
times larger in both direccions, depending on the parity of .
Application of these results to the Abelian Chern-Simons is discussed.Comment: 24 pages, latex, no figures; title changed; last version published in
JM
Vector Mesons and Baryon Resonances in Nuclear Matter
We calculate the effect of many-body interactions in nuclear matter on the
spectral function of and meson. In particular, we focus on the
role played by baryon resonances in this context.Comment: 4 pages, 4 figures, to be published in proceedings of the Third
International Conference on Perspectives on Hadronic Physics, 7 - 11 May
2001, Miramare-Trieste, Ital
Smooth representations and sheaves
The paper is concerned with `geometrization' of smooth (i.e. with open
stabilizers) representations of the automorphism group of universal domains,
and with the properties of `geometric' representations of such groups. As an
application, we calculate the cohomology groups of several classes of smooth
representations of the automorphism group of an algebraically closed extension
of infinite transcendence degree of an algebraically closed field.Comment: 20 pages, final versio
Nurses' and community support workers' experience of telehealth: A longitudinal case study
Copyright © 2014 Sharma and Clarke; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.This article has been made available through the Brunel Open Access Publishing Fund.Background - Introduction of telehealth into the healthcare setting has been recognised as a service that might be experienced as disruptive. This paper explores how this disruption is experienced. Methods - In a longitudinal qualitative study, we conducted focus group discussions prior to and semi structured interviews post introduction of a telehealth service in Nottingham, U.K. with the community matrons, congestive heart failure nurses, chronic obstructive pulmonary disease nurses and community support workers that would be involved in order to elicit their preconceptions and reactions to the implementation. Results - Users experienced disruption due to the implementation of telehealth as threatening. Three main factors add to the experience of threat and affect the decision to use the technology: change in clinical routines and increased workload; change in interactions with patients and fundamentals of face-to-face nursing work; and change in skills required with marginalisation of clinical expertise. Conclusion - Since the introduction of telehealth can be experienced as threatening, managers and service providers should aim at minimising the disruption caused by taking the above factors on board. This can be achieved by employing simple yet effective measures such as: providing timely, appropriate and context specific training; provision of adequate technical support; and procedures that allow a balance between the use of telehealth and personal visit by nurses delivering care to their patients
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