2,187 research outputs found

    Temptation in the Archives: Essays in Golden Age Dutch Culture

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    Temptation in the Archives is a collection of essays by Lisa Jardine, that takes readers on a journey through the Dutch Golden Age. Through the study of such key figures as Sir Constantjin Huygens, a Dutch polymath and diplomat, we begin to see the Anglo-Dutch cultural connections that formed during this period against the backdrop of unfolding political events in England. Temptation in the Archives paints a picture of a unique relationship between the Netherlands and England in the 17th century forged through a shared experience – and reveals the lessons we can learn from it today

    Graph-Embedding Empowered Entity Retrieval

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    In this research, we improve upon the current state of the art in entity retrieval by re-ranking the result list using graph embeddings. The paper shows that graph embeddings are useful for entity-oriented search tasks. We demonstrate empirically that encoding information from the knowledge graph into (graph) embeddings contributes to a higher increase in effectiveness of entity retrieval results than using plain word embeddings. We analyze the impact of the accuracy of the entity linker on the overall retrieval effectiveness. Our analysis further deploys the cluster hypothesis to explain the observed advantages of graph embeddings over the more widely used word embeddings, for user tasks involving ranking entities

    'O decus Italiae virgo’ or, the myth of the learned lady in the Renaissance

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    Let me start by making it clear that, taken at face value, my title is entirely a piece of mischief: I am not about to disclose the fact that there were actually no learned women in Italy in the fifteenth century. Indeed, this paper is built around the careers and works of five distinguished women intellectuals of that period: Isotta Nogarola (1418–66); Costanza Varano (1426–77); Cassandra Fedele (c. 1465–1558); Laura Cereta (1469–99); and Alessandra Scala (1475–1506). There is, however, a serious point to my choice of words in the title. The point is that the ‘learned lady’ of the Renaissance (the cultivated noblewoman, beautiful, charming, gifted, ‘gentile’) has a mythic place in the secondary historical literature on humanism. From Isabella d'Este to Sir Thomas More's daughters and the English Tudor princesses, the cultivated gentlewoman is the Beatrice or the Laura of some male humanist's circle, his hi adoring pupil, his inspiration, his idol. Scholars adopt a fondly indulgent tone when discussing the women, which carries the implication that their intellectual calibre, their actual standing as scholars and humanists, is not a real issue, is perhaps not in fact of any real substance (a figment, rather, of their male admirers' or suitors' imaginations). The single scholarly piece of any significance on the life and work of Alessandra Scala concludes with typical sentimental indulgence:Her noble and elusive aspect – for no portrait of her survives, unless perhaps she smiles at us, unrecognised, in the guise of a saint or a goddess, from one of Botticelli's canvases, or that of some other Florentine artist – yet that aspect shines forth from the shadows of the past, and casts a beauteous and gracious light upon the discordant chorus of Florentine humanism at the end of the fifteenth century

    Strategies for the discontinuation of humidified high flow nasal cannula (HHFNC) in preterm infants (Review)

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    BACKGROUND: Humidified high flow nasal cannula (HHFNC) delivers humidified gas at increased flow rates via binasal prongs and is becoming widely accepted as a method of non-invasive respiratory support for preterm infants. While indications for the use of (HHFNC) and its associated risks and benefits are being investigated, the best strategy for the discontinuation of HHFNC remains unknown. At what point an infant is considered stable enough to attempt to start withdrawing their HHFNC is not known. The criteria for a failed attempt at HHFNC discontinuation is also unclear

    fMR-Adaptation Reveals Invariant Coding of Biological Motion on the Human STS

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    Neuroimaging studies of biological motion perception have found a network of coordinated brain areas, the hub of which appears to be the human posterior superior temporal sulcus (STSp). Understanding the functional role of the STSp requires characterizing the response tuning of neuronal populations underlying the BOLD response. Thus far our understanding of these response properties comes from single-unit studies of the monkey anterior STS, which has individual neurons tuned to body actions, with a small population invariant to changes in viewpoint, position and size of the action being viewed. To measure for homologous functional properties on the human STS, we used fMR-adaptation to investigate action, position and size invariance. Observers viewed pairs of point-light animations depicting human actions that were either identical, differed in the action depicted, locally scrambled, or differed in the viewing perspective, the position or the size. While extrastriate hMT+ had neural signals indicative of viewpoint specificity, the human STS adapted for all of these changes, as compared to viewing two different actions. Similar findings were observed in more posterior brain areas also implicated in action recognition. Our findings are evidence for viewpoint invariance in the human STS and related brain areas, with the implication that actions are abstracted into object-centered representations during visual analysis

    Coronal structure of the cTTS V2129 Oph

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    The nature of the magnetic coupling between T Tauri stars and their disks determines not only the mass accretion process but possibly the spin evolution of the central star. We have taken a recently-published surface magnetogram of one moderately-accreting T Tauri star (V2129 Oph) and used it to extrapolate the geometry of its large-scale field. We determine the structure of the open (wind-bearing) field lines, the closed (X-ray bright) field lines and those potentially accreting field lines that pass through the equatorial plane inside the Keplerian co-rotation radius. We consider a series of models in which the stellar magnetic field is opened up by the outward pressure of the hot coronal gas at a range of radii. As this radius is increased, accretion takes place along simpler field structures and impacts on fewer sites at the stellar surface. This is consistent with the observed variation in the Ca II IRT and HeI lines which suggests that accretion in the visible hemisphere is confined to a single high-latitude spot. By determining the density and velocity of the accretion flows, we find that in order to have most of the total mass accretion rate impacting on a single high-latitude region we need disk material to accrete from approximately 7R*, close to the Keplerian co-rotation radius at 6.8R*. We also calculate the coronal density and X-ray emission measure. We find that both the magnitude and rotational modulation of the emission measure increase as the source surface is increased. For the field structure of V2129 Oph which is dominantly octupolar, the emission forms a bright, high-latitude ring that is always in view as the star rotates. Since the accretion funnels are not dense enough to cause significant scattering of coronal X-ray photons, they provide only a low rotational modulation of around 10% at most.Comment: 10 pages, 9 figure

    A sensitivity study on the mechanical properties of interface elements adopted in finite element analyses to simulate the interaction between soil and laterally loaded piles

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    An increasing number of offshore energy structures have been built recently on driven piles, ranging from jack- et piles with typical length-to-diameter (L/D) ratios of 10-40 to monopiles with far lower L/D ratios. The load-displacement behaviour of these foundations can be investigated by means of Finite Element (FE) analyses, for instance following the design methodology developed by the PISA Joint Industry Project (JIP). A challenging aspect of the modelling, for piles loaded either axially or laterally, is the simulation of the behaviour at the soil-pile interface with the adoption of suitable formulations for the interface elements and with representative mechanical properties. This paper presents a sensitivity study conducted on both the elastic and plastic properties of interface elements adopted in FE analyses of laterally loaded piles driven in chalk. The study benefited from the extensive field and laboratory test results collected during the ALPACA JIP and the corresponding pile tests. The aim of the paper is to provide guidance for numerical modelling on the selection of the most appropriate mechanical properties of interface elements to be used in the analyses of soil-pile interaction under lateral loading

    Non-linear finite-element analysis of axially loaded piles driven in chalk

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    Driven piles are often employed to support onshore and offshore structures at low-density, porous weak carbonate chalk sites, which are encountered across Northern Europe and under the North and Baltic seas. Their efficient design is limited by uncertainties regarding their ultimate axial capacity and load-displacement behaviour. Intensive axial testing has been under- taken recently for the ALPACA Joint Industry Project on piles driven at a UK chalk site, in conjunction with comprehensive chalk characterisation studies. This paper presents PLAXIS-2D numerical simulations of such piles' axial loading behaviour. The simulation accounts for three distinct zones of chalk identified around the pile shafts after installation. These comprise a thin annular zone of de-structured, puttified, chalk and a second, thicker, annular zone of highly fractured chalk; both have different mechanical properties compared to the surrounding parent intact chalk mass. The FE analyses investigate how shaft resistance, axial capacity and load-displacement behaviour develop differently in compression and tension tests
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