There is considerable interest in using guided waves for wide-area structural health monitoring of plate-like structures, because of their sensitivity to early damages and their relatively slow geometrical decay. Lamb waves are suitable... more
There is considerable interest in using guided waves for wide-area structural health monitoring of plate-like structures, because of their sensitivity to early damages and their relatively slow geometrical decay. Lamb waves are suitable for quantitative imaging of laminar damage, particularly if the damage can be characterised by a single parameter, e.g. by the local value of bending stiffness. However current imaging methods rely on the availability of baseline response. The present work investigates to extend quantitative diffraction tomography imaging to use modeconverted scatter data, thereby providing a baseline-free approach to in-situ imaging. Using simulated data generated analytically for a circular blind hole in an isotropic plate, it is shown that it is possible to use a diffraction tomography formulation that takes into account mode-converted scattered waves to image laminar damage. The results show that the damage was accurately reconstructed for non-converted scatter wave modes. But only the size of the damage could be reconstructed when converted wave modes were used because of some band-pass imaging effects that are inherent in the diffraction tomography framework.
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S'en aller est un roman divise en deux parties, lesquelles se declinent respectivement en quatre chapitres, puis en huit chapitres. Il a ete pense comme une exploration du deuil que vivent deux personnages, pere et fils (le... more
S'en aller est un roman divise en deux parties, lesquelles se declinent respectivement en quatre chapitres, puis en huit chapitres. Il a ete pense comme une exploration du deuil que vivent deux personnages, pere et fils (le narrateur), alors qu'ils doivent se rendre a Baie-Comeau pour recuperer la depouille de la mere qui s'est enleve la vie. La trame narrative du roman se construit sur plusieurs temporalites (passe et present des personnages) et mele fiction – la vie qu'invente le narrateur a sa mere dans la deuxieme partie – et presente realite des personnages (le voyage qu'ils entreprennent vers le nord du Quebec). L'exploration du deuil qui est a l'origine de S'en aller sert aussi a interroger la memoire du narrateur et ainsi observer les liens souvent indiscernables qui s'etablissent entre le reel et la fiction. L'appareil reflexif accompagnant le roman est lui aussi divise en deux parties, lesquelles se declinent toutes les deux en trois chapitres. La premiere partie de l'essai se concentre sur la question du silence en litterature; comment se definit-il dans l'ecriture et lors de la lecture, et quelle place occupe-t-il dans le texte? Il faut ici prendre le silence non pas comme une absence, mais plutot comme une presence, comme un espace discursif ou le sens d'une œuvre peut se construire et se deployer. La deuxieme partie – reposant essentiellement sur les recits de deuil d'Eric Fottorino, Annie Ernaux, Delphine de Vigan et Roland Barthes – definit d'abord les caracteristiques de l'ecriture du deuil en etablissant des liens entre les differents textes a l'etude. Ensuite, et finalement, elle aborde les questions suivantes : qu'est-ce que peut l'ecriture dans un contexte de deuil? En quoi sert-elle l'endeuille? ______________________________________________________________________________ MOTS-CLES DE L’AUTEUR : deuil, silence, filiation, memoire, roman
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Page 1. THE SOUTHWESTERN NATURALIST 28(4):387-398 DECEMBER 9, 1983 POPULATION STRUCTURE, DENSITY AND MOVEMENTS OF THE TEXAS TORTOISE GOPHER US BERLANDIERI FRANK W. JUDD AND FRANCIS L. ROSE ...
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... Measured and Predicted Egg Volume of Pseudemys texana with Comments on Turtle Egg Shape FRANCIS L. ROSE, THOMAS R. SIMPSON, AND RICHARD W. MANNING, Department of Biology, Southwest Texas State University, San Marcos, Texas 78666-4616,... more
... Measured and Predicted Egg Volume of Pseudemys texana with Comments on Turtle Egg Shape FRANCIS L. ROSE, THOMAS R. SIMPSON, AND RICHARD W. MANNING, Department of Biology, Southwest Texas State University, San Marcos, Texas 78666-4616, USA. ...
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This wild flower identification guide was first published in 1981 and is still widely accepted as the best of its kind for its combination of meticulous illustrations and the use of keys to aid recognition. For this new edition, the Latin... more
This wild flower identification guide was first published in 1981 and is still widely accepted as the best of its kind for its combination of meticulous illustrations and the use of keys to aid recognition. For this new edition, the Latin names have been revised in accordance with the current classification system. It is now published as the ideal book for the serious student of British and north-west European wild plants, providing a bridge between picture identification guides and the non-illustrated academic floras.
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Research Interests: Biology, Medicine, Internal Medicine, Anoxia, Blood Glucose, and 9 moreAnimals, Heart rate, Muscles, Skin, Bufonidae, Time Factors, Toad, Glycogen, and Bradycardia
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Existing vibration-based approaches for damage detection are qualitative. The present work explores the concept of an inverse method to obtain a quantitative characterisation of impact damaged structures, based on matching experimentally... more
Existing vibration-based approaches for damage detection are qualitative. The present work explores the concept of an inverse method to obtain a quantitative characterisation of impact damaged structures, based on matching experimentally observed deflection or curvature profiles to parametric, model based, predictions of those profiles. Experimental and computational studies have been undertaken on laminated beam specimens containing delamination damage. It is shown that the curvature profiles cannot be correctly predicted by an inhomogeneity model in which the delaminated region is modelled as a region of reduced bending stiffness. Instead, it is essential to retain the geometrical feature of having at least one delamination. An inverse approach is implemented for estimating key model parameters based on matching finite element model predictions to full-field deflection or curvature profiles measured experimentally under forced vibration. It is indicated that it may be possible to optimise the detection and characterisation of specific types of damage by a judicious choice of the frequency and configuration of the applied loads.
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It has recently been shown that it is possible to formulate an analogue of diffraction tomography within the framework of Mindlin plate theory, and that this can be used for imaging certain forms of laminar damage, most notably... more
It has recently been shown that it is possible to formulate an analogue of diffraction tomography within the framework of Mindlin plate theory, and that this can be used for imaging certain forms of laminar damage, most notably delamination damage in fibre composites. This paper presents a comparison of imaging algorithms using as input the multistatic data matrix, which is not restricted to far-field measurements, unlike diffraction tomography. This new approach, based on linear inverse theory, offers advantages of (i) being able to perform near-field imaging; (ii) using arbitrary source-receiver arrays, which can therefore be tailored to fit in with geometrical constraints within the structure; and (iii) being able to cater for known background complexities, such as the presence of stiffeners, through the use of a Green's function that incorporates the influence of those complexities on wave propagation through the structure. These advantages will greatly facilitate the practical implementation of this new algorithm for in-situ imaging of structural damage. A new algorithm based on the singular value decomposition of the multi-static data matrix is presented that leads more naturally to a formalism for dealing with noisy data through truncation of the retained singular values in accordance with the signal-to-noise ratio.
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SIDALC - Servicio de Informacion y Documentacion Agropecuaria de las Americas.
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1. Prog Exp Tumor Res. 1976;20:251-62. Tumorous growths of the tiger salamander, Ambystoma tigrinum, associated with treated sewage effluent. Rose FL. PMID: 981691 [PubMed - indexed for MEDLINE]. Publication Types: Research Support, US... more
1. Prog Exp Tumor Res. 1976;20:251-62. Tumorous growths of the tiger salamander, Ambystoma tigrinum, associated with treated sewage effluent. Rose FL. PMID: 981691 [PubMed - indexed for MEDLINE]. Publication Types: Research Support, US Gov't, Non-PHS. ...
Research Interests: Biology, Medicine, Animals, Salamander, Clinical Sciences, and 5 moreCaudata, Sewage, Neoplasms, Tiger Salamander, and Ambystoma
... Euonymus europaeus o.-a. Viburnum lantana a. Ligustrum vulgare f.-a. ... C. oxyacanthoides vr Viburnum lantana a.-ld The herb layer in this copse appears in two separate facies which seem constant, due to small local variations in... more
... Euonymus europaeus o.-a. Viburnum lantana a. Ligustrum vulgare f.-a. ... C. oxyacanthoides vr Viburnum lantana a.-ld The herb layer in this copse appears in two separate facies which seem constant, due to small local variations in soil moisture. ...
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A guide to the wild flowers of the British Isles and North West Europe, describing 1400 species.