2,024 research outputs found
THE HILGER INFRARED DOUBLE BEAM SPECTROPHOTOMETER
No full textAuthor Institution: Hilger and Watts, Ltd
Ondaatje\u27s The English Patient and Rewriting History
No full textStephanie M. Hilger, in her paper Ondaatje\u27s The English Patient and Rewriting History, situates the novel within the long-standing Western tradition of writing about the cultural Other, from Herodotus to Michel de Montaigne to Rudyard Kipling. Michel de Certeau\u27s notion of history serves as a reference point for the analysis of Ondaatje\u27s presentation of the English patient\u27s story as well as of twentieth-century history. Hilger argues that the protagonist\u27s physical mutilation is a metonymic representation of post-World War II and postcolonial consciousness. In the same way that the characters in the novel attempt to understand the mystery that is the English patient, Ondaatje\u27s readers are led on a search for the understanding of a brutal and fragmented reality. While the novel questions and undermines the opposition between the civilized and the barbarian, Ondaatje also suggests that certain historical realities, such as the dropping of the atomic bomb, force characters into a binary that they have been trying to deconstruct throughout the narrative
FILOGENESI delle BRIOFITE: Sistematica e Caratteristiche delle Piante terrestri non vascolari (Muschi, Epatiche, Antocerote) Versione italiana di: COLE T.C.H., HILGER H.H., GOFFINET B. (2019) Bryophyte Phylogeny Poster.
No full textAlbero ipotetico basato su dati di filogenesi molecolare; lunghezza dei rami arbitraria, non corrispondente alla reale scala temporale; la posizione di diversi caratteri sull’albero è incerta; alcuni ordini e famiglie sono stati omessi; i caratteri elencati non sono necessariamente applicati a tutti i componenti del rispettivo clade
Pontechium maculatum U. - R. Böhle & H. H. Hilger 1818
No full text<p> <b>Echium maculatum</b> Linnaeus, <i>Amoenitates Academicae</i> 4: 478. 1759.</p> <p> Lectotype (Hilger & Böhle in <i>Taxon</i> 49: 744. 2000): [icon] " <i>Echium rubro flore</i> " in Clusius, Rar. Pl. Hist. 2: 164. 1601.</p> <p> Current name: <i>Pontechium maculatum</i> (L.) Böhle & Hilger (Boraginaceae).</p>Published as part of <i>Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part E), pp. 490-515 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum</i> on page 491, DOI: <a href="http://zenodo.org/record/291971">10.5281/zenodo.291971</a>
G. E. Bacon (éd.), Fifty years of neutron diffraction: The advent of neutron Scattering. Publ. with the assistance of the International Union of Crystallography (Bristol: Adam Hilger, 1987)
No full textG. E. Bacon (éd.), Fifty years of neutron diffraction: The advent of neutron Scattering. Publ. with the assistance of the International Union of Crystallography (Bristol: Adam Hilger, 1987). In: Revue d'histoire des sciences, tome 44, n°1, 1991. p. 129
Assessment of tibial fracture healing using dual energy X-ray absorptiometry
No full textThe assessment of fracture healing is largely a matter of clinical judgement, often based on observing x-rays showing the formation of bridging callus or obscuration of the fracture line and an impression of fracture stiffness obtained by manual loading. In circumstances where these assessment methods are compromised, for example in fractures stabilised using either external fixation or intramedullary nailing, the determination of healing can be problematic. Dual Energy X-ray Absorptiometry (DXA) provides a quick, non-invasive and quantitative method of measuring bone density, which could enable the change in mineral content at a healing site to be monitored. This study evaluated the viability of using DXA to assess the healing of tibial fractures stabilised using intramedullary nails and external fixators. Trials have been undertaken on a Lunar DPX-L scanner situated at South Cleveland Hospital, Middlesbrough. Aluminium and hydroxyapatite phantoms have been used to determine the accuracy, sensitivity and reproducibility of the DXA measurements. Small fracture gaps of less than 0.05 mm were detectable on both simulated transverse and oblique fractures. BMD values which one might expect at a fracture site could be accurately measured down to 0.16 g cm(^-2)14 Patients with tibial fractures (6 with intramedullary nails and 8 with external fixators) have been measured at 4 week intervals following trauma. The bone mineral density (BMD) at regions of interest along the fractured tibial shaft were compared to the non-fractured contra-lateral. Anatomical landmarks were used to relocate the regions of interest between scans and good reproducibility of results (coefficient of variation = 3.36 %) was obtained. After an initial fall in the first month, the BMD at the fracture site gradually increased to the original unfractured value by approximately the fifth month post-fracture. Proximal and distal to the trauma site there was a gradual decrease in BMD in all of the patients, which persisted for about 5 months post-fracture
A Troubled International Merger. Pirelli Dunlop Union (1970–1981)
No full textIl saggio ricostruisce la controversa esperienza della fusione tra Pirelli e Dunlop negli anni settanta del Novecento
Gauge theory constraints on the fermion-boson vertex
No full textIn this thesis we investigate the role played by fundamental properties of QED in determining the non-perturbative fermion-boson vertex. These key features are gauge invariance and multiplicative renormalisability. We use the Schwinger-Dyson equations as the non- perturbative tool to study the general structure of the fermion-boson vertex in QED. These equations, being an infinite set, have to be truncated if they are to be solved. Such a truncation is made possible by choosing a suitable non-perturbative ansatz for the fermion-boson vertex. This choice must satisfy these key properties of gauge invariance and multiplicative renormalisability. In this thesis we develop the constraints, in the case of massless unquenched QED, that have to be fulfilled to ensure that both the fermion and photon propagators are multiplicatively renormalisable-at least as far as leading and subleading logarithms are concerned. To this end, the Schwinger-Dyson equations are solved perturbatively for the fermion and photon wave-function renormalisations. We then deduce the conditions imposed by multiplicative renormalisability for these renormalisation functions. As a last step we compare the two results coming from the solution of the Schwinger-Dyson equations and multiplicative renormalisability in order to derive the necessary constraints on the vertex function. These constitute the main results of this part of the thesis. In the weak coupling limit the solution of the Schwinger-Dyson equations must agree with perturbation theory. Consequently, we can find additional constraints on the 3- point vertex by perturbative calculation. Hence, the one loop vertex in QED is then calculated in arbitrary covariant gauges as an analytic function of its momenta. The vertex is decomposed into a longitudinal part, that is fully responsible for ensuring the Ward and Ward-Takahashi identities are satisfied, and a transverse part. The transverse part is decomposed into 8 independent components each being separately free of kinematic singularities in any covariant gauge in a basis that modifies that proposed by Ball and Chiu. Analytic expressions for all 11 components of the O(a) vertex are given explicitly in terms of elementary functions and one Spence function. These results greatly simplify in particular kinematic regimes. These are the new results of the second part of this thesis
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