8,419 research outputs found

    A review of user interface adaption in current semantic web browsers

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    The semantic web is an example of an innumerable corpus because it contains innumerable subjects expressed using innumerable ontologies. This paper reviews current semantic web browsers to see if they can adaptively show meaningful data presentations to users. The paper also seeks to discover if current semantic web browsers provide a rich enough set of capabilities for future user interface work to be built upon

    Creating welcoming spaces in the city : exploring the theory and practice of ‘hospitality’ in two regional theatres

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    This paper explores the relationship between notions of ‘access’ and ‘hospitality’ by focusing on two practice-led research interventions conducted in two regional arts venues in the culturally and ethnically diverse city of Coventry, UK. By conceptualising Warwick Arts Centre and The Belgrade Theatre as potential sites of hospitality, I consider the ways they might offer young people spaces of access, conviviality, and belonging in this multicultural city. Drawing on Jacques Derrida’s notion of ‘conditional’ and ‘unconditional’ hospitality, both cases offer examples of devised youth theatre practice that aimed to renegotiate the ‘host/guest’ binary towards more meaningful and convivial relationships

    Customer satisfaction, training and TQM: a comparative study of Western and Thai hotels

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    Managers within the hospitality industry make frequent reference to TQM principles. The extent to which these principles are applied effectively within the human resource management area of hospitality however remains under-researched. By applying TQM principles, this paper focusses on the relationship between customer service and training drawing upon comparative data from Western and Thai hotels. The paper also examines the perceptions of staff towards of hotels' guest-orientation and the provision of quality guest services. The researchers found that guest assessments of the performance of hotel frontline staff depend on their services function (e.g., front-office, housekeeping). The service quality skills needed by frontline staff were also found to differ in the case of Western and Thai hotels. Such differences merit proper consideration on the part of managers within the major hotel chains. The various findings may assist hospitality managers to determine appropriate strategies for the enhancement of guest services particularly in cross-cultural settings

    Digestibility of Rations and Nitrogen Balance by Lambs as Influenced by Animal Fat, Urea, Soybean Meal and Linseed Meal

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    Feed processing and handling of livestock feeds have benefited from the use of fats in many ways. Nutritionally speaking, several reasons in favor of the use of stabilized animal fats in feeds have been reported. However, the optimum level and value of added fats in the rations for ruminants are not well established and further work is needed. It is known that fat is absorbed more slowly from the intestine than either carbohydrates or protein, and this may be an important factor in the utilization of added fat in the diet. Research with urea as a protein sparer has been widespread, and its potential is more closely defined than is that of added fat in the ration. Both urea and fat are being used in some commercial feeds. It has been shown that urea is more efficiently utilized in protein synthesis with starch than with sugar. The effects of high levels of fat on urea utilization need to be determined if they are to be used together in ruminant feeds. The work reported herein is a part of a project designed to determine the effect of lard, urea, soybean meal, and linseed meal upon the digestibility of rations and nitrogen balance by lambs. Rations testing these factors singularly and in combination were employed in an attempt to gain a more concise picture of the action of these factors upon the digestibility of the other nutrients in these rations

    The West Island Site (41MXI65)

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    This paper describes a set of artifacts collected from the West Island site, a poorly known Titus phase cemetery in Ellison Creek Reservoir. The site is on a small knoll adjacent to a small spring branch that flows into the now-inundated Ellison Creek, a tributary of Big Cypress Creek. The site knoll is now no more than one foot (30 em) above the normal pool elevation of Ellison Creek Reservoir, and it is usually totally submerged. Up to five feet (1.52 meters) of white sand caps the knoll, and overlies the clay subsoil. Due to continued submergence, the knoll is being eroded by the reservoir, anq. consequently many stone tools and pieces of lithic debris are present along the water\u27s edge. Dart points and arrowpoints have been found at the site, along with some pottery sherds, but no grounds tone implements. Small amounts of charcoal were found around the top of the knoll in pockets of modern mussel shell and gravels, but its association with the site deposits is unknown. No middens are known to be present on the knoll. The West Island site has been previously dug by private collectors sometime before 1965. Turner had examined some of the site collections, and reported that, ceramic vessels of the types Avery Engraved, Bailey Engraved, Bullard Brushed, Cowhide Stamped, Harleton Appliqued, Hodges Engraved, Karnack Brushed-Incised, Maydelle Incised, Ripley Engraved, Simms Engraved, Taylor Engraved, and Wilder Engraved were present in an unknown number of burials. These types of decorated ceramics are characteristic of the Titus phase, which dates from about 1400 to the 1600s

    Increasing African-American Participation in Nutrition Education Programs for Low-Income Consumers

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    This article documents the dramatic decline in African American participation in the EFNEP and FSNEP programs offered by Los Angeles County Cooperative Extension, although nutrition-related health concerns among this population have increased. The authors conducted a series of key informant interviews and focus groups in African American communities throughout L.A. County to gain insight on how to increase the participation of African-Americans in nutrition education classes. Study findings suggest that specific marketing strategies for African-Americans, including cultural relevance, support teams, food demonstrations, and de-emphasizing the low income focus, would help facilitate this goal

    The absorption-dominated model for the X-ray spectra of type I active galaxies: MCG-6-30-15

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    MCG-6-30-15 is the archetypal example of a type I active galaxy showing broad "red-wing" emission in its X-ray spectrum at energies below the 6.4 keV Fe K-alpha emission line and a continuum excess above 20 keV. Miller et al. (2008) showed that these spectral features could be caused by clumpy absorbing material, but Reynolds et al. (2009) have argued that the observed Fe K-alpha line luminosity is inconsistent with this explanation unless the global covering factor of the absorber(s) is very low. However, the Reynolds et al. calculation effectively considers the only source of opacity to be the Fe K bound-free transition and neglects the opacity at the line energy: correction to realistic opacity decreases the predicted line flux by a large factor. We also discuss the interpretation of the covering factor and the possible effect of occultation by the accretion disk. Finally, we consider a model for MCG-6-30-15 dominated by clumpy absorption, which is consistent with global covering factor 0.45, although models that include the effects of Compton scattering are required to reach a full understanding. Variations in covering fraction may dominate the observed X-ray spectral variability.Comment: Accepted for publication in MNRAS letter

    Broadband short term variability of the quasar PDS 456

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    We present a detailed analysis of a recent 500500 ks net exposure \textit{Suzaku} observation, carried out in 2013, of the nearby (z=0.184z=0.184) luminous (Lbol1047_{\rm bol}\sim10^{47} erg s1^{-1}) quasar PDS 456 in which the X-ray flux was unusually low. The short term X-ray spectral variability has been interpreted in terms of variable absorption and/or intrinsic continuum changes. In the former scenario, the spectral variability is due to variable covering factors of two regions of partially covering absorbers. We find that these absorbers are characterised by an outflow velocity comparable to that of the highly ionised wind, i.e. 0.25\sim0.25 c, at the 99.9%99.9\% (3.26σ)(3.26\sigma) confidence level. This suggests that the partially absorbing clouds may be the denser clumpy part of the inhomogeneous wind. Following an obscuration event we obtained a direct estimate of the size of the X-ray emitting region, to be not larger than 20 Rg20~R_{\rm g} in PDS 456.Comment: 6 pages, 5 figures, Proceedings of the 2015 XMM-Newton workshop: "The Extremes of Black Hole Accretion". Published in Astronomische Nachrichten/Astronomical Note

    An ultraluminous supersoft source with a 4 hour modulation in NGC 4631

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    Context. Supersoft X-ray sources (SSSs) are characterised by very low temperatures (< 100 eV). Classical SSSs have bolometric luminosities in the range of 10^36-10^38 erg/s and are modelled with steady nuclear burning of hydrogen on the surfaces of white dwarfs. However, several SSSs have been discovered with much higher luminosities. Their nature is still unclear. Aims. We report the discovery of a 4h modulation for an ultraluminous SSS in the nearby edge-on spiral galaxy NGC 4631, observed with XMM-Newton in 2002 June. Temporal and spectral analysis of the source is performed. Methods. We use a Lomb-Scargle periodogram analysis for the period search and evaluate the confidence level using Monte-Carlo simulations. We measure the source temperature, flux and luminosity through spectral fitting. Results. A modulation of 4.2+-0.4 h (3 sigma error) was found for the SSS with a confidence level >99%. Besides dips observed in the light curve, the flux decreased by a factor of 3 within ~10h. The spectrum can be described with an absorbed blackbody model with kT~67eV. The absorbed luminosity in the 0.2-2 kev energy band was 2.7x10^38 erg/sec while the bolometric luminosity was a hundred time higher (3.2x10^40 erg/s), making the source one of the most luminous of its class, assuming the best fit model is correct. Conclusions. This source is another very luminous SSS for which the standard white dwarf interpretation cannot be applied, unless a strong beaming factor is considered. A stellar-mass black hole accreting at a super Eddington rate is a more likely interpretation, where the excess of accreted matter is ejected through a strong optically-thick outflow. The 4 h modulation could either be an eclipse from the companion star or the consequence of a warped accretion disk.Comment: 4 pages, 4 figures, accepted as a Letter in Astronomy & Astrophysic
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