53,940 research outputs found
The digital divide in a world city
No full textFoley lead author.
Commisioned by Greater London Authority, LondonConnects and the London Development agency.http://static.london.gov.uk/gla/publications/e-london/digital_divide.pd
A 2 h periodic variation in the low-mass X-ray binary Ser X-1
No full textSpectroscopy of the low-mass X-ray binary Ser X-1 using the Gran Telescopio Canarias have revealed a ?2 h periodic variability that is present in the three strongest emission lines. We tentatively interpret this variability as due to orbital motion, making it the first indication of the orbital period of Ser X-1. Together with the fact that the emission lines are remarkably narrow, but still resolved, we show that a main-sequence K dwarf together with a canonical 1.4 M? neutron star gives a good description of the system. In this scenario, the most likely place for the emission lines to arise is the accretion disc, instead of a localized region in the binary (such as the irradiated surface or the stream-impact point), and their narrowness is due instead to the low inclination (?10°) of Ser X-1
Professionalism, golf coaching and a master of science degree
No full textA distinction can be made between 'professionalisation', which is concerned with occupational status and standing, and 'professionalism,' which refers to matters of quality and standards of practice (especially specialized knowledge, ethics and altruism). The purpose of this stimulus article is to present key features of contemporary medical professionalism as a basis for critically reflecting on discourse associated with Tiger Woods' current coach, Sean Foley. It is suggested that that provision of a Master of Science degree in golf teaching/coaching would facilitate the development of 'professionalism' in golf coaches
Placement of an extra amniotic foley catheter is a simple and inexpensive alternative to pharmacologic induction of cervival ripening with prostaglandin E2.
No full textPlacement of an extra amniotic foley catheter is a simple and inexpensive alternative to pharmacologic induction of cervival ripening with prostaglandin E2
Extracting Boer-Mulders functions from p+D Drell-Yan processes
No full textWe extract the Boer- Mulders functions of valence and sea quarks in the proton from unpolarized p + D Drell- Yan data measured by the FNAL E866 Collaboration. Using these Boer- Mulders functions, we calculate the cos2 phi asymmetries in unpolarized pp Drell- Yan processes, both for the FNAL E866/ NuSea and the BNL Relativistic Heavy Ion Collider experiments. We also estimate the cos2 phi asymmetries in the unpolarized p (P) over bar Drell- Yan processes at GSI.Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)37ARTICLE5null7
Connecting people: Tackling exclusion? An examination of the impact on and use of the internet by socially excluded groups in London
No full textFoley lead author.
Foreword by Ken Livingstone, Mayor of London and response by Clive Ansell, Director BT, London.
Commisioned by: Greater London Authority, London Development Agency, LondonConnects and BThttp://static.london.gov.uk/gla/publications/e-london/connecting-commties.pd
A statistical analysis of circumstellar material in Type Ia supernovae
No full textA key tracer of the elusive progenitor systems of Type Ia supernovae (SNe Ia) is the detection of narrow blueshifted time-varying Na I D absorption lines, interpreted as evidence of circumstellar material surrounding the progenitor system. The origin of this material is controversial, but the simplest explanation is that it results from previous mass-loss in a system containing a white dwarf and a non-degenerate companion star. We present new single-epoch intermediate-resolution spectra of 17 low-redshift SNe Ia taken with XShooter on the European Southern Observatory Very Large Telescope. Combining this sample with events from the literature, we confirm an excess (∼20 per cent) of SNe Ia displaying blueshifted narrow Na I D absorption features compared to redshifted Na I D features. The host galaxies of SNe Ia displaying blueshifted absorption profiles are skewed towards later-type galaxies, compared to SNe Ia that show no Na I D absorption and SNe Ia displaying blueshifted narrow Na I D absorption features have broader light curves. The strength of the Na I D absorption is stronger in SNe Ia displaying blueshifted Na I D absorption features than those without blueshifted features, and the strength of the blueshifted Na I D is correlated with the B − V colour of the SN at maximum light. This strongly suggests the absorbing material is local to the SN. In the context of the progenitor systems of SNe Ia, we discuss the significance of these findings and other recent observational evidence on the nature of SN Ia progenitors. We present a summary that suggests that there are at least two distinct populations of normal, cosmologically useful SNe Ia
Computer graphics : principles and practice /
No full textFirst ed., by James D. Foley and Andries van Dam, published under title: Fundamentals of interactive computer graphics.Illustrated lining papers.Includes bibliographical references (p. 1113-1151) and index
Rejoinder to Duncan Foley and David Laibman
No full textArticle that appeared as Zarembka, P (ed) Economic Theory of Capitalism and its Crises, Research in Political Economy 18, pp285-93. Stanford, CT: JAI Press. (http://www.elsevier.com/wps/find/bookdescription.cws_home/621298/description#description) Responds to debate initiated in Research in Political Economy 17 (http://www.elsevier.com/wps/find/bookdescription.cws_home/621907/description#description) This article formed the final part of a four-way exchange on the rate of profit which appeared in Research in Political Economy 17 and 18 in 1999 and 2000, between David Laibman, Duncan Foley, Andrew Kliman and Alan Freeman. This piece constituted Kliman and Freeman’s final response to the debate around Laibman’s initial critique of the Temporal Single System Interpretation (TSSI) of Marx’s value theory.TSSI; MELT; value; Marx; price; profit rate; Okishio; non-equilibrium; equilibrium; money; sraffaTSSI, MELT, value, Marx, price, profit rate, Okishio, non-equilibrium, equilibrium, money
Nb and Ta incorporation and fractionation in titanian pargasite and kaersutite: crystal-chemical constraints and implications for natural systems
No full textNew partition coefficients between liquid and pargasitic/kaersutitic amphiboles ((Amph/L)D(Nb,Ta)) experimentally determined for Nb and Ta at upper-mantle conditions, combined with single-crystal structure refinement of the synthesised amphiboles, show that (Amph/L)D(Nb,Ta) are strongly dependent on the structure and composition of both amphibole and melt. The correlation of the (Amph/L)D(Nb,Ta) with the amphibole oxy-component is explained by the ordering of Nb and Ta at the M1 site, contributing with the fraction of Ti at M1 to loclaly balance the (O3)O2- ⇆ (O3)(OH)- substitution. In our set of dehydrogenated amphiboles, variations in the SiO2 content of the melt from 41.5 to 54.6 correspond to a six-fold increase of the (Amph/L)D(Nb,Ta), in which (Amph/L)D(Nb) varies from 0.14 to 0.71 and (Amph/L)D(Ta) from 0.11 to 0.54. Partition coefficients for Nb and Ta abruptly increase in Ti-depleted compositions ((Amph/L)D(Nb) up to 1.63 and (Amph/L)D(Ta) to 1.00). The ratio of D(Nb) to D(Ta) ((Amph/L)D(Nb/Ta)) varies from 0.71 to 1.63, and is a function of the M1 site dimension, which in turn depends on its Fe, Mg and Ti contents. The observed variations can be explained by assuming that the ionic radius of Nb is (~0.01-0.02 Å) larger than that of Ta, contrary to the common assumption that they are both equal to 0.64 Å. We calibrated a simplified model for the prediction of (Amph/L)D(Nb/Ta) values shown to be negatively related mainly to mg [Mg/(Mg+Fe)] and to Ti content. High-mg amphiboles have (Amph/L)D(Nb/Ta) close to unity, so the low Nb/Ta found in convergent margin volcanics and in the continental crust cannot be explained by the involvement of amphibole in the mantle wedge. Amphibole in the subducting slab may have lower mg and consequently high Nb/Ta values, and thus may give rise to subchondritic Nb/Ta values in coexisting melts. Nb/La is also negatively correlated with mg, and strongly increases in Ti-depleted compositions
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