Academic literature on the topic 'Rayson'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Rayson.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Rayson"
1
Narod, Steven A., and Kelly A. Metcalfe. "Reply to D. Rayson et al." Journal of Clinical Oncology 28, no. 18 (June 20, 2010): e309-e309. http://dx.doi.org/10.1200/jco.2010.29.1146.
Full text
2
Heaton, J. Brian. "A Lifetime in Academia: An Autobiography by Rayson Huang. By Rayson Huang. [Hong Kong: Hong Kong University Press, 2000. 168 pp. ISBN 962-209-518-6.]." China Quarterly 168 (December 2001): 1001–43. http://dx.doi.org/10.1017/s0009443901450595.
Full text
3
Jaafar, Eman Adil. "Poetic Language and the Computer: A Corpus Stylistic Study of The Waste Land." International Journal of Language and Literary Studies 3, no. 1 (March 30, 2021): 230–39. http://dx.doi.org/10.36892/ijlls.v3i1.525.
Full textAbstract:
This study aims at proposing a methodology in analyzing one of the significant poems of the twentieth century, The Waste Land by T.S. Eliot. By means of applying the tools of the computer, namely; Wmatrix (Rayson 2003, 2008) and WebCorp Live (Birmingham City University). This paper seeks to examine whether corpus stylistics can be helpful in analyzing a single poem 2. Verifying the importance of corpus tools in interpreting poetic language. Moreover, this study attempts to examine key semantic domains, keywords, and concordances in the poem. This study proves that corpus tools are crucial in matters of saving time, reaching to accurate results and achieving much more objectivity than applying only the qualitative method in analyzing the data. Thus, it is recommended to integrate both methodologies (qualitative and quantitative) in the study of poetic language.
4
Bridle, Marcus. "Male blues lyrics 1920 to 1965: A corpus based analysis." Language and Literature: International Journal of Stylistics 27, no. 1 (February 2018): 21–37. http://dx.doi.org/10.1177/0963947017751757.
Full textAbstract:
This study examines corpora comprised of 795 lyrics from 35 male blues singers, recorded between 1920 and 1965. The study uses the concept of literary foregrounding (Leech, 2008) and the computer program Wmatrix (Rayson, 2009) to identify key semantic domains and key words in the lyrics before engaging in a qualitative analysis of concordances to analyse patterns of language use. Lyrics recorded in the pre-World War Two period (1920 to 1941) are contrasted with those recorded in the post-war period (1945 to 1965). The results suggest that the male blues lyrics of the period under investigation, and in particular the way in which they differ between the pre- and post-World War Two eras, might reflect the demographic changes of the African-American community of the time and their relationship with aspects of the dominant ideology.
5
Lu, Xiaofei. "Review of Xiao, Rayson & McEnery (2009): A Frequency Dictionary of Mandarin Chinese: Core Vocabulary for Learners." Chinese Language and Discourse 1, no. 1 (June 21, 2010): 125–29. http://dx.doi.org/10.1075/cld.1.1.05lu.
Full text
6
Skorczynska Sznajder, Hanna Teresa. "A COMPARATIVE STUDY OF KEYWORDS IN ENGLISH-LANGUAGE CORPORATE PRESS RELEASES FROM EUROPEAN COMPANIES: INSIGHTS INTO DISCURSIVE PRACTICES." Discourse and Interaction 9, no. 1 (June 30, 2016): 49. http://dx.doi.org/10.5817/di2016-1-49.
Full textAbstract:
This study provides insights into discursive practices through a comparative study of keywords in English-language press releases from British, Spanish and Polish energy companies. Even though corporate press releases have been extensively researched, there is a lack of cross-cultural and corpus-based studies in this fi eld. In the present research three corpora of approximately 120,000 words each, containing English-language press releases from British, Spanish and Polish energy companies, were used. The keywords were identifi ed with the Wmatrix tool (Rayson 2009) and the reference corpus consisted of business periodical articles. The analysis of corpus keywords usually provides insights that would be diffi cult to gain by means of manual analyses of texts or qualitative approaches. The results obtained in this study show notable diff erences between the corpora with regard to the keywords identifi ed. The use of more general meaning keywords by British companies or more technical keywords by Polish companies suggest that lexical choices might be indicative of diff erent discursive practices used to reach stakeholders and the general public.
7
HSU, KYLIE. "A Frequency Dictionary of Mandarin Chinese: Core Vocabulary for Learners by XIAO, RICHARD, PAUL RAYSON, & TONY MCENERY." Modern Language Journal 95, no. 3 (September 2011): 466–68. http://dx.doi.org/10.1111/j.1540-4781.2011.01212_11.x.
Full text
8
Yildiz, Yasemin. "Explaining the orthography–phonology interface in written corpora: an Optimality–Theoretic approach." Corpora 12, no. 2 (August 2017): 181–205. http://dx.doi.org/10.3366/cor.2017.0116.
Full textAbstract:
This paper has two goals. The first goal is to contribute to the literature of Second Language Writing Systems (L2WS) by focussing on the British University in Dubai (BUiD) and the Arab Learner Corpus (BALC). The second is to demonstrate the close orthography–phonology interface in L2WS and critically address the issue of reform in a script. Unlike previous studies, which provide a holistic and descriptive analysis of all possible spelling errors of Arab learners of English (e.g., Haggan, 1991 ; and Randall and Groom, 2009 ), this study is different in two ways. First, BALC will be interpreted within a markedness framework and a constraint-based theory known as Optimality Theory. Second, particular emphasis will be given to the erroneous spelling forms which appear in lexical items exclusively with complex onset and coda clusters at the phonological level. The motive for this study is to look beyond spelling errors and bridge linguistic theory with learner corpora. The sub-corpora will be identified and categorised by using the Wmatrix3 program ( Rayson, 2003 , 2005 ). The fulfilment of the above goals will provide new insights for researchers and teachers who are working closely in the areas of L2WS and learner corpora.
9
Demjén, Zsófia. "Motion and conflicted self metaphors in Sylvia Plath’s ‘Smith Journal’." Metaphor and the Social World 1, no. 1 (July 22, 2011): 7–25. http://dx.doi.org/10.1075/msw.1.1.02dem.
Full textAbstract:
This paper considers how mental states can be conveyed by metaphorical expressions in texts of a personal nature. Figurative language is understood to play an important role in the expression of such complex nuanced phenomena (Lakoff & Johnson, 1999; Kövecses, 2000; Gibbs, Leggit & Turner, 2002). This study focuses on two main groups of metaphors, linked to mental states, in the Smith Journal of “The Unabridged Journals of Sylvia Plath”. ‘Mental state’ here refers to various aspects of cognitive functioning, but with a focus on mental states of affect — mental states that are intrinsically valenced (Ortony & Turner, 1990). Specifically, this paper focuses on metaphors of MOTION and SPLIT SELF. Both manual intensive analyses and automated corpus methodologies are employed in the investigation: Wmatrix (Rayson, 2009) is used to explore relevant expressions, in order to obtain a comprehensive understanding of metaphor groups. Relevant expressions are identified by an in-depth manual analysis of sample journal entries. The MIP procedure (Pragglejaz, 2007) is used for metaphor identification, and interpretations draw on research in psychology. Metaphors of mental states are analyzed in terms of their implications for conveying various aspects of mental states, such as valence and intensity.
10
Salama, Amir H. Y., and Waheed M. A. Altohami. "Exploring Edward Said’s Journalistic Collocations in Al-Ahram Weekly Newspaper: A Corpus-Based Approach." International Journal of English Linguistics 9, no. 6 (November 12, 2019): 431. http://dx.doi.org/10.5539/ijel.v9n6p431.
Full textAbstract:
This paper explores Edward Said’s journalistic collocations as a discursive practice of the social actors that Said frequently referred to in Al-Ahram Weekly newspaper. Towards this end, a corpus-based approach has been utilized in a methodological synergy that combines the corpus techniques of extracting keywords and calculating collocations as well as the qualitative method of analysing social-actor representations (Van Leeuwen, 1996, 2008). The data used for analysis comprise a corpus of virtually all the articles written by Said in Al-Ahram Weekly from 1998 till 2003. The corpus is 105,031words and has been electronically manipulated by the corpus software tools of Wmatrix (Rayson, 2003) and WordSmith (Scott, 2012). The paper has reached three findings. First, Said’s journalistic discourse in Al-Ahram Weekly revolves around 38 social-actor keywords that reflect his thematic foci all through the time span he was writing articles for the newspaper. Second, of all these keywords, only twelve node words have been identified to associate with peculiar collocates; the node words were divided into (1) nominations of political personas and (2) genericizations with various discourse functions. Third, Said’s peculiar collocations reflected his ideological orientations towards certain political personas and specific topics in his journalistic discourse.
Dissertations / Theses on the topic "Rayson"
1
Bonjour, Philippe. "Criteres de choix des scanners a rayons x." Aix-Marseille 2, 1990. http://www.theses.fr/1990AIX20852.
Full text
2
Carrot, Laurent. "Rayon [rhô]-numérique." Lyon 1, 2003. http://www.theses.fr/2003LYO10190.
Full textAbstract:
Dans un premier temps, on s'intéressera aux propriétés du rayon [rhô] -numérique dans les espaces de Hilbert, notion initialement introduite par Sz. -Nagy et Foias à l'aide de la [rhô]-dilatation unitaire. Puis, l'étude du shift tronqué sur l(2n) permettra d'évaluer la constante dans une inégalité de Von Neumann avec contraintes, donnée par Badea et Cassier. Ensuite, à l'aide d'une condition sur la croissance de la résolvante, nous étendrons cette notion aux espaces de Banach. L'usage de la résolvante pour les définir assurera des classes C(p)"solides", qui conserveront de nombreuses propriétés. De plus, elles permettront de passer continuement de la classe des contractions à celle des opérateurs de rayon spectral inférieur à 1. Ces classes seront donc très riches, et elles pourraient fournir une alternative à la notion de [rhô]-dilatation unitaire pour les espaces de Banach. Enfin, nous étudierons des classes particulières d'opérateurs, dont notamment les shifts à poids sur l(1) et les nilpotents.
3
Herzog, Charlotte. "imagerie plénoptique : de la lumière visible aux rayons X." Thesis, Bordeaux, 2020. http://www.theses.fr/2020BORD0116.
Full textAbstract:
L’imagerie plénoptique est une technique basée sur l’acquisition des informations spatiales et angulaires des rayons lumineux provenant d’une scène. A partir d’une seule acquisition, un traitement numérique des données permet diverses applications comme la synthèse d’ouverture, le changement de point de vue, la refocalisation à différentes profondeurs, voire une reconstruction en 3D de la scène. L’imagerie plénoptique est beaucoup étudiée dans le visible. La transposition du visible dans le domaine des rayons X est un réel défi. L’imagerie plénoptique permettrait une imagerie 3D en rayons X à partir d’une seule acquisition. Cela aiderait à réduire fortement la dose absorbée par l’échantillon, par rapport à la tomographie qui nécessite une centaine de vues.Dans cette thèse, nous considérons une caméra plénoptique constituée d’une lentille principale, d’une matrice de microlentilles et d’un détecteur. Deux configurations optiques distinctes, constituées de ces trois éléments, sont présentées dans la littérature : la caméra plénoptique « traditionnelle » et celle « focalisée ». La principale différence se trouve dans les distances entre les éléments optiques. L’observation d’une continuité entre ces deux configurations nous a amené à établir un système unique d’équations permettant leur conception optique, ainsi que l’expression théorique des résolutions associées. Ces résolutions ont été validées expérimentalement dans le visible. De plus, l’étude de l’évolution du contraste en fonction de la profondeur a montré que le contraste diminue quand on s’éloigne d’une position privilégiée intrinsèque à la configuration. C’est un résultat important car il pourrait affecter la qualité de l’image reconstruite et l’extraction de la profondeur.Nous avons aussi travaillé sur les algorithmes de refocalisation préexistants, développés indépendamment pour chaque configuration. Nous avons élaboré un nouvel algorithme valide pour les deux configurations. Ce dernier est basé sur les distances physiques entre les éléments optiques, et permet une refocalisation à une distance arbitraire de la caméra. Tout d’abord, nous avons défini une nouvelle paramétrisation entre les espaces objet et image, en établissant la relation matricielle qui régit le trajet d’un rayon lumineux à l’intérieur de la caméra. Cette relation permet de projeter les données acquises par le capteur dans l’espace objet, et ainsi de reconstruire une image pixel par pixel à la profondeur choisie. En inversant les équations, nous avons montré qu’il était possible de créer des images plénoptiques synthétiques. La reconstruction de ces données synthétiques nous a permis de valider la cohérence des résultats après reconstruction, et de quantifier la précision de ce nouvel algorithme.Cet algorithme permet de reconstruire séparément chaque plan de profondeur. Dans chacun d’entre eux, les éléments physiques qui appartiennent réellement à ce plan sont nets, alors que les objets des plans adjacents sont flous. Nous utilisons cette propriété de contraste pour extraire l’information de profondeur dans les images refocalisées. Nous avons sélectionné plusieurs méthodes provenant du domaine de « depth from focus » et avons étudié leurs efficacités sur nos images.Dans le cadre d’une collaboration européenne, nous avons construit la première caméra plénoptique dans les rayons X au synchrotron PETRA III. Grâce au travail réalisé pendant cette thèse, nous avons choisi les configurations optiques les plus adaptées aux optiques disponibles et aux caractéristiques du faisceau. Nous avons réalisé le montage de la caméra, acquis des images plénoptiques en rayons X, refocalisé ces images avec notre algorithme, et vérifié les résolutions optiques. Les méthodes de « depth from focus » appliquées sur les images refocalisées ont permis de retrouver la profondeur attendue. Ce travail correspond aux premières images acquises avec une caméra plénoptique en rayons XPlenoptic imaging is a technique that acquires spatial and angular information of the light rays incoming from a scene. After a single acquisition, numerical data treatment allows image manipulation such as synthetic aperture, changing viewpoint, refocusing at different depths, and consequently 3D reconstruction of the scene. Visible plenoptic has been widely studied. However, transposition from visible to X-rays has never been done and remains challenging. X-ray plenoptic would be beneficial to the X-ray imaging panorama. A single acquisition should be sufficient to reconstruct a volume, against 1000’s for X-ray tomography that is the today reference in 3D X-ray imaging.In this thesis, we consider plenoptic camera composed of a main lens, a microlens array and a detector. So far, two different configurations have been developed: the traditional and the focused plenoptic setups. Although these configurations are usually studied separately, they only differ by the distances between the optical elements. These two configurations were studied in detail to choose the most suitable for X-ray imaging, considering the constraints of X-ray optics. We observed a full continuity between the two systems. Therefore, we extended the previous work to more general formulas about optical configuration and theoretical resolutions. Theory about resolution along the depth axis was refined, as depth reconstruction and extraction are the main interest of X-ray plenoptic. Specific study was done on the evolution of contrast along depth as being a key parameter for depth reconstruction. We realized that contrast decreases when moving away from a privileged depth. This is important to consider as it can affect image reconstruction and quality of depth extraction.We also worked on refocusing algorithms. The refocusing algorithms are usually developed for each configuration separately. We worked to go beyond this separation. We developed a new algorithm valid for any configurations. Moreover, our algorithm is based on real distances between the optical elements, allowing generating images at any distances from the plenoptic camera. We defined a new parameterization between object and image spaces. Using geometrical optics, we calculated the matrix transformation between the two spaces. This allows back-projecting data from the acquired raw image to the object space, and reconstructing the pixels one by one, until the whole object. With this algorithm, we were able to simulate the process of image acquisition, and create synthetic plenoptic data. Reconstruction of these data was used to quantify the accuracy of the novel algorithm and prove its consistency.The refocusing algorithm allows reconstructing the depth planes one by one. Each refocused plane contains information about the whole 3D scene that has to be disentangled. The elements physically present at the refocused depth are intrinsically sharp, whereas the ones located at other depths are blurred. We used this contrast property to extract depth from the refocused images. We tested several existing methods derived from the field of depth from focus and studied their efficiency when applied to our images.In collaboration with European teams, we realized the first X-ray plenoptic camera that was tested at P05 beamline of PETRA III synchrotron. Based on the theoretical work developed in this thesis, we defined the best optical configuration, mounted the plenoptic camera, acquired X-ray plenoptic images, numerically refocused them using the new algorithm and verified the experimental resolutions and contrasts. Depth from focus techniques applied on the refocused stack allow to retrieve the expected depth plane. These are the first images acquired with an X-ray plenoptic camera
4
Arguin, Hans. "Étude d'une antenne circulaire de rayon arbitraire /." Montréal : Trois-Rivières : Université du Québec à Montréal ; Université du Québec à Trois-Rivières, 2003. http://www.uqtr.ca/biblio/notice/resume/18046060R.pdf.
Full textAbstract:
Thèse (M. en physique)--Université du Québec à Montréal, 2003.En tête du titre: Université du Québec à Montréal. "Mémoire présenté comme exigence partielle de la maîtrise en physique offerte par extension à l'Université du Québec à Montréal en vertu d'un protocole d'entente avec l'Université du Québec à Trois-Rivières." Bibliogr.: f. 70-71.
5
Freychet, Guillaume. "Analyses morphologiques et dimensionnelles de nanostructures organisées par diffusion centrale des rayons X." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAY076/document.
Full textAbstract:
L'industrie des semi-conducteurs fait aujourd'hui face à des challenges importants en termes de caractérisation. En effet, la diminution des tailles et des distances inter-objets a poussé les techniques, jusqu’alors utilisées sur les lignes de production, la microscopie (SEM) et l’ellipsométrie (OCD) ont montré plusieurs limites.. Ainsi, afin de répondre aux demandes de l’industrie, soit un contrôle précis de l’uniformité et des défauts en cours de production, des besoins en termes de métrologie sont apparus.Dans ce contexte, des techniques utilisant les rayons X ont commencé à être évaluée. Ainsi, le SAXS (Small Angle X-Ray Scattering) est une technique de diffusion des rayons X aux petits angles (angles d’incidences compris entre 0.1 et 10°) permettant l’étude d’objets de taille comprise entre 1 et 100 nm. Cette technique consiste à bombarder un échantillon avec des rayons X et à collecter grâce à un détecteur les photons traversant l’échantillon (étude en transmission). Elle est sensible au contraste de densité électronique à l’intérieur de l’échantillon. C’est une technique complémentaire aux techniques de caractérisation locale telles que les microscopies, car elle permet d’obtenir une information moyennée sur une grande surface (plusieurs mm2). Une seconde technique, le GISAXS (Grazing-Incidence SAXS) est également en plein développement. C’est une technique analogue au SAXS cependant, le faisceau de rayons X ne traverse plus l’échantillon mais est réfléchi par celui-ci. Ce qui permet l’étude de films minces ou de nanoobjets déposés sur des surfaces. Ces deux techniques sont non destructives. L’objectif de cette thèse a été d’implanter ces deux techniques au sein de la plateforme de nanocaractérisation du CEA-LETI et de montrer le leurs pertinences et leurs capacités à répondre aux demandes de l’industrie de la micro-électronique. Pour se faire la thèse se divise en deux thématiques.Dans un premier temps, des études de Contrôle-Dimensionnel SAXS (CD-SAXS) ont été réalisées sur des réseaux d’objets tridimensionnels, tels que des réseaux de lignes ou d’empilement multicouches avec des applications autour de la lithographie. Nous avons ainsi pu mettre en évidence la capacité du CD-SAXS à extraire la période et la largeur de lignes ainsi que leurs profils (hauteur de lignes et angles de parois notamment) avec une précision sub-nanométrique. De plus, la caractérisation de rugosité le long des lignes a également été étudiée. Les résultats autour du CD-SAXS sont prometteurs et permettent aujourd’hui d’envisager des approches multi-techniques afin de combiner par exemples les informations locales obtenues par microscopie et les informations statistiques obtenues par SAXS.Dans un second temps, des études GISAXS sur des films de copolymères à blocs ont été réalisées, avec pour objectifs l’utilisation de ces films comme masques pour la lithographie. Tour d’abord le système classique PS-b-PMMA a été étudié à haute énergie, et plus précisément le retrait d’un des deux blocs de polymères uniquement. Puis des mesures au seuil du carbone ont également été réalisées afin de montrer la capacité des rayons X à différencier deux espèces très proches chimiquement. De nouveaux systèmes de copolymères dit "high chi" (avec une plus grande répulsion entre bloc) ayant pour objectifs la génération d’objets plus petits ont également été étudiés. Pour finir l’approche développée au CEA nommée contact hole shrink a également été suivie par GISAXS et comparé avec les résultats obtenus par CD-SAXSThe semiconductor industry now faces significant challenges in terms of characterization. Indeed, the size and inter-object distances reduction pushed the techniques previously used, such as microscopy (SEM) and ellipsometry (OCD) to their limitations. So in order to cope with demand of the industry (a precise control of the uniformity and defects) some needs in terms of metrology appeared.In this context, X-ray techniques were evaluated. Therefore, X-ray scattering at small angle (SAXS), using incident angles comprise between 0.1 and 10° to detect 1-100 nm objects, was studied. This technique consists on sending X-ray on a sample and to collect thanks to a 2D detector the photon going through the sample (study in transmission). This technique will detect the electronic density contrast in the sample and is nondestructive. Moreover, the statistical information over a large area (several mm2) obtained from SAXS is complementary with the local and direct information obtained from microscopies. A second technique called GISAXS (Grazing-incidence SAXS) was also tested. The X-ray beam is no more transmitted through the sample but reflected on the substrate. GISAXS is more adapted for the study of thin films and nano-objects deposited on substrate. The aim of this thesis was the implementation of SAXS and GISAXS techniques on the nanocharacterization platform of the CEA-LETI and the demonstration of the ability of such techniques to control the dimension and morphologies of samples coming from the micro-electronics industry. This thesis was divided in two parts.The first one deals with critical-dimension SAXS. The control of profiles and size of 3D arrays, such as line gratings or multilayer samples, were performed on samples related to lithographic applications. We showed the capability of CD-SAXS to extract the period, the line width and the line profile (height and sidewall angle) with a sub-nanometer resolution of line gratings. Therefore, line roughness was also studied, showing promising results on periodic roughness with sub-nanometer amplitudes. Results around CD-SAXS led to new possibilities such as the multi-scale approaches, with several techniques to control in the same time the local structure, with microscopes, and the statistical structures with CD-SAXS.Secondly, GISAXS studies were performed on block copolymer films used as masks for lithography. First, the conventional system PS-b-PMMA was studied at high energy and more precisely, the removal of the PMMA bloc only. Then measurements at the carbon were also carried out to demonstrate the ability of X-rays to differentiate between two materials with quasi-similar chemical compositions. Therefore, new copolymer systems, called "high chi" (with higher repulsion between block) were also studied. Such polymers lead to the reduction of the obtained patterns. Finally the contact hole shrink approach developed at CEA was also studied by GISAXS and compared with results obtained by CD-SAXS
6
Birrento, Ana Clara. "About Raymond Williams." Bachelor's thesis, Routledge, 2010. http://hdl.handle.net/10174/28797.
Full textAbstract:
Williams brought together what modern thought has separated in the relation between culture and society. His use of literary texts to exemplify the concept of knowable community as well as the concept of structure of feeling is one of his achievements. To read novels as knowable communities comprises a project of cultural construction based on the refusal to consider the separation between culture and society; it is not to hesitate between tenses and to give a future to the imagination of the authors and of the readers.
7
Maquinghen, Anne-Pascale. "Modélisation géométrique et cinématique 3D du rachis scoliotique pour la réalisation d'un outil d'aide au medecin." Valenciennes, 1991. https://ged.uphf.fr/nuxeo/site/esupversions/ef98d2a0-b271-4070-b83c-e130440c9fe6.
Full textAbstract:
L'objet de cette thèse est la réalisation d'un logiciel d'aide au chirurgien pour l'orthopédie rachidienne. Dans une première étape, ce logiciel permet de visualiser un modèle géométrique tridimensionnel du rachis sur écran graphique. Les paramètres de ce modèle sont identifiés, sur les radiographies frontale et latérale du rachis, par digitalisation de points particuliers situés sur les vertèbres et le socle pelvien. Un calcul de stéréocorrespondance, adapté à ce cas, fournit les coordonnées 3D de ces points ; l'incertitude sur la position vertébrale est estimée inferieure au centimètre. Un traitement numérique sur les paramètres du modèle permet de calculer les variables et indices caractéristiques de la scoliose. Dans une seconde étape, le modèle du rachis est formulé comme une chaine cinématique générale 3D dont les paramètres sont identifiés à partir de mesures de position et d'inclinaison sur des radiographies du patient en flexion corrective extrême. Cette formulation permet une recherche automatique de la forme rachidienne optimale que peut atteindre un patient. L'algorithme de recherche de l'optimalité consiste à imposer la correction maximale admissible de la courbure principale et une correction uniforme et partielle des contre-courbures. Le travail effectue fait partie de l'étude d'un système général d'aide au chirurgien entreprise en collaboration avec quatre équipes régionales dans le cadre du pole G. B. M.
8
THIRION, JEAN-PHILIPPE. "Utilisation de la coherence des rayons lumineux pour le lancer de rayons." Paris 11, 1990. http://www.theses.fr/1990PA112210.
Full textAbstract:
Le lancer de rayons est une technique pratique et souple pour le calcul d'images de syntheses. Cette technique permet plus generalement de decrire le comportement d'une surface d'onde vis-a-vis d'un ensemble complexe d'objets, en discretisant cette onde sous la forme de rayons elementaires, que l'on suit a chaque reflexion et refraction sur les surfaces rencontrees, le probleme, de nature algorithmique, consiste a determiner, le plus rapidement possible, les intersections entre des millions de rayons et des millions d'objets. De nombreuses etudes ont ete menees, afin de determiner la structure de donnee la mieux adaptee au lancer de rayons. Les recherches se portent maintenant sur les algorithmes de calcul d'intersection entre objets plus complexes, particulierement vers l'introduction de faisceaux utilisant la coherence des rayons lumineux. Cette these s'articule autour de trois idees principales, dont deux ont donne matiere a publication. La premiere est l'utilisation d'une structure de donnees nouvelle pour le lancer de rayons, appelee arbre binaire contracte ou trie, basee sur la representation binaire. Les idees suivantes sont deux utilisations de la coherence des rayons et cette these demontre pour la premiere fois que ce type de coherence peut conduire a une acceleration effective du lancer de rayons. L'une de ces methodes utilise l'arithmetique des intervalles, approche tres generale qui ne necessite pas d'autres hypotheses que celle de coherence entre les rayons. L'autre est un calcul exacte de visibilite, utilisant les arbres binaires de partition de l'espace, celle-ci presuppose la definition d'un point d'observation et de sources lumineuses ponctuelles. Cette derniere methode peut egalement etre utilisee pour le calcul des facteurs de forme des methodes de radiosite
9
Bassi, Tiziana. "Accrétion et éjection dans les systèmes binaires X transitoires à trous noirs : le cas de GRS 1716-249." Thesis, Toulouse 3, 2020. http://www.theses.fr/2020TOU30019.
Full textAbstract:
Les transitoires à trou noir (BHT) sont parmi les sources X les plus brillantes de la galaxie. Grace à leur flux X intense et leur variabilité rapide, elles offrent une opportunité unique d'étudier la physique de l'accrétion dans des conditions physiques extrêmes. Ces sources présentent des éruptions épisodiques caractérisées par différents niveaux de luminosité en rayons X et gamma, différentes formes spectrales et propriété de variabilité temporelle. Le but de cette thèse est de mieux comprendre la géométrie, les mécanismes et les processus physiques jouant un rôle dans la transitoire X à trou noir brillante GRS 1716-249. Je présente l'analyse spectrale et temporelle des observations de GRS 1716-249 en rayons X effectuées avec l'Observatoire Neil Gehrels Swift durant son éruption de 2016-2017. Ces données m'ont permis d'étudier l'évolution des paramètres physique pendant toute la durée de l'éruption ainsi que les changements de géométrie de la matière accrétante durant les transitions spectrales. Je montre que le disque d'accrétion pourrait avoir atteint la dernière orbite circulaire stable pendant l'état dur intermédiaire. Ceci est en accord avec le modèle de disque tronqué dans lequel bord interne du disque se rapproche de l'objet compact. De plus, le suivi de la source en ondes radio, effectué pendant l'éruption, me permet de placer la source sur la branche radio faible de la correlation des luminosités radio et X. Par la suite, je me concentre sur l'émission en rayons gamma mous de la source. Un excès à haute énergie est détecté au dessus de 200 keV par rapport au spectre de Comptonization thermique. L'origine de cette composante pourrait être l'émission Compton inverse par des électrons non-thermiques dans la couronne, ou l'émission synchrotron d'electron relativistes dans le jet. Je commence par fitter le spectre large bande X/gamma de GRS 1716-249 avec des modèles de Comptonization hybride thermique/non-thermique : eqpair et belm. Les ajustements spectraux avec belm me donnent une limite supérieure sur l'intensité du champs magnétique dans la couronne. Je considère ensuite la possibilité que l'excès à haute énergie soit d au jet. Dans ce but, j'ai produit une distribution spectrale d'énergie s'étendant de la radio jusqu'au rayons gamma. J'ajuste ces données avec un modèle de disque d'accrétion irradié plus Comptonization pour simuler l'émission du flot d'accrétion, et un modèle de shock internes pour l'émission du jet (ishem).[...]Black hole transients (BHTs) are among the brightest X-ray sources in the Galaxy. Thanks to their high X-ray flux and short variability time scales they offer a unique opportunity to study the physics of the accretion under extraordinary physical conditions. These sources show episodic outbursts characterised by different X/gamma-ray luminosities, spectral shapes and timing properties. The aim of this thesis is the understanding of the geometry, mechanisms and physical processes playing a role in the bright black hole X-ray transient GRS 1716-249. I present the spectral and timing analysis of X-ray observations performed with the Neil Gehrels Swift Observatory on GRS 1716-249 during the 2016-2017 outburst. These data gave me the opportunity to study the evolution of physical parameters and geometry variation of the accreting matter through the spectral transitions during the whole outburst. I found that the accretion disc could have reached the inner stable circular orbit during the hard intermediate state, coherently with the truncated accretion disc scenario in which the disc moves closer to the compact object. Then, the radio monitoring performed during the outburst let me locate the source on the ever more populated radio-quiet branch on the radio/X-ray luminosity plane. Thereafter, focusing on the soft gamma-ray emission of the source, I observed a high energy excess, above 200 keV, in addition to the thermal Comptonisation spectrum. This component could be originate either through inverse Compton of the soft photons by non-thermal electrons in the corona, or from synchrotron emission of energetic electrons in the jet. First, I fitted the broad band X/gamma-ray spectrum of GRS 1716-249 with hybrid Comptonisation thermal/non-thermal models: eqpair and belm. Using belm I obtained an upper limit on the magnetic field intensity in the corona. Finally, I investigated the possible origin of this high energy excess as due to jet emission. To this aim, I computed the Spectral Energy Distribution of GRS 1716-249 with the multi-wavelength observations (from the radio band to gamma-rays) performed. I modelled the accretion flow with an irradiated disc plus Comptonisation model and the jet emission with the internal shock emission model (ishem). This model assumes that the jet velocity fluctuations are directly driven by the variability of X-ray timing proprieties of the accretion flow. Even though ishem reproduces the radio and soft gamma-ray data of GRS 1716-249, the results seems to disfavour the jet scenario for the excess above 200 keV, in favour of non-thermal Comptonisation process
10
Balducci, Lodovico. "Dynamics of hemeproteins by femtosecond X-ray techniques." Thesis, Rennes 1, 2019. http://www.theses.fr/2019REN1S115.
Full textAbstract:
Récemment, la mise au point de techniques de radiographie à résolution temporelle a ajouté la dimension temporelle à la recherche dans le domaine de la biologie structurale et celles-ci se sont avérées être d'excellents outils pour suivre l'évolution structurale des protéines lors d'une réaction. En particulier, les sources de rayons X de 4ème génération (appelées lasers à électrons libres et à rayons X), avec des impulsions de l'ordre de la femtoseconde et des fluences extrêmement élevées, sont capables de sonder des ensembles de molécules essentiellement gelées dans le temps dans des conditions physiologiques. Après un aperçu des études publiées dans la littérature scientifiques, une introduction de base des techniques utilisées est présentée, accompagnée d'une description du dispositif expérimental et du flux de réduction des données. Les deux derniers chapitres sont consacrés à la présentation des résultats obtenus au cours de deux séries d'expériences réalisées au LCLS (SLAC, Menlo Park, CA, USA), pour étudier les changements structuraux des protéines dans la réaction de photodissociation prototypique du monoxyde de carbone chez des hemoprotéines. Au cours de la première expérience, la modification structurelle globale de trois hemoprotéines a été sondée par une technique de diffusion à résolution temporelle, afin d'observer d'éventuelles différences dans ce que l'on appelle le ''protein quake'' lié à la structure de la protéine. Dans la deuxième expérience, le site actif de la myoglobine a été sondé au cours de la même réaction par absorption de rayons X. Les spectres XANES à résolution temporelle ont été comparés à des calculs théoriques, dans le cadre de la théorie de la diffusion multiple, afin d'obtenir une image détaillée de la dynamique ultrarapide. Un bref projet secondaire portait à mesurer précisément des modèles de diffusion statique de la carboxyhémoglobine, afin de définir ses structures d'équilibre multiple par comparaison avec des combinaisons linéaires de structures cristallographiques connues. En conclusion, dans cette thèse de doctorat, nous avons essayé d'apporter quelques petits éléments dans la compréhension de la dynamique ultrarapide des protéines, en appliquant à la fois des méthodes d'analyse standard (Guinier), mais aussi des méthodes presque inexplorées (calculs de diffusion multiple sur des données à résolution temporelle). Selon le système et le niveau de détail requis, ces méthodes, appliquées ici aux à des systèmes modèles, peuvent être considérées d'excellents outils dans la recherche ultérieure sur des protéines plus complexesRecently, the development of time resolved X-ray techniques has added the time dimension to structural biology studies, and have proven to be great tools to track proteins during the course of a reaction, or a specific conformational change. In particular the 4th generation X-ray sources (so called X-ray Free-Electron Lasers), with femtosecond pulses and extremely high fluences, are capable of probing ensembles of molecules essentially frozen in time under physiological conditions. After an overview of the past studies in the field, a basic introduction of the used techniques, the description of the experimental set-up and the flow of data reduction are presented. The last two chapters are devoted to present the results obtained during two separate sets of experiments, conducted at the XPP beamline of the Linac Coherent Light Source (SLAC, Menlo Park, CA, USA), to study the protein's structural changes, upon prototypical photo-dissociation reaction of carbon monoxide from heme proteins. During the first experiment, the global structural modification of three heme proteins has been probed by means of time resolved scattering technique, in order to observe eventual differences in the so called “protein-quake” depending on the protein's structure. In the second experiment, the active site of myoglobin was probed, during the same reaction, by X-ray absorption. The time resolved XANES spectra have been compared with theoretical calculations, in the framework of the multiple scattering theory, in order to retrieve a detailed picture of the ultra-fast dynamics. A further small side-project dealt with the precise measurement of static scattering patterns of carboxy hemoglobin with the goal of defining its multiple equilibrium structures by comparison with linear combinations of known crystallographic structures. In conclusion, in this Ph.D. thesis we tried to add some small pieces in the understanding of ultra-fast proteins dynamics by applying both standard (Guinier) and almost unexplored (multiple scattering calculations on time resolved data) analysis methods: depending on the system and the level of details required, these methodologies, here applied on model systems, can be considered excellent tools for further research on more complicated proteins
Books on the topic "Rayson"
1
Rayson, Leland H. Leland Rayson. Springfield, Ill: Office, 1987.
Find full text
2
Miranda, Sawyer, and Kettle's Yard Gallery, eds. David Rayson: Somewhere else is here. Cambridge: Kettle's Yard, 2003.
Find full text
3
Huang, Rayson. A lifetime in academia: An autobiography by Rayson Huang. 2nd ed. Hong Kong: Hong Kong University Press, 2011.
Find full text
4
Allen, Mary B. The immigrants, George Read/Reed and Sarah Rayson: The pioneers, Thomas Law Reed and Amantha Ann Smith : with ancestors and descendants. Sonora, Calif: M.B. Allen, 1995.
Find full text
5
Rayon d'espoir. Chicoutimi [Québec]: JCL, 1986.
Find full text
6
Randall, Rona. TheD rayton legacy. London: Hamilton, 1985.
Find full text
7
Forner, Claude Garcia. Rayon bleu: Poèmes. Montpellier: Sauramps, 2004.
Find full text
8
Le rayon gommant. Montréal, Québec: Boréal, 2006.
Find full text
9
Rohmer, Éric. Le Rayon vert. Paris: L'Avant-Scène, 1986.
Find full text
10
Le rayon jaune. Auxerre: Viamédias, 2010.
Find full textBook chapters on the topic "Rayson"
1
Gooch, Jan W. "Rayon." In Encyclopedic Dictionary of Polymers, 610. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_9785.
Full text
2
Baker, Ian. "Rayon." In Fifty Materials That Make the World, 195–97. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78766-4_37.
Full text
3
Bährle-Rapp, Marina. "Rayon." In Springer Lexikon Kosmetik und Körperpflege, 470. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_8777.
Full text
4
Gooch, Jan W. "Cuprammonium Rayon." In Encyclopedic Dictionary of Polymers, 186. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_3181.
Full text
5
Gooch, Jan W. "Rayon Acetate." In Encyclopedic Dictionary of Polymers, 610. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_9786.
Full text
6
Gooch, Jan W. "Rayon Fiber." In Encyclopedic Dictionary of Polymers, 610–11. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_9787.
Full text
7
Gooch, Jan W. "Viscose Rayon." In Encyclopedic Dictionary of Polymers, 797. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_12593.
Full text
8
Sengupta, A. K. "Rayon fibres." In Manufactured Fibre Technology, 480–513. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5854-1_17.
Full text
9
Busse, Beatrix. "Toward Developing a Procedure for Automatically Identifying Speech, Writing, and Thought Presentation." In Speech, Writing, and Thought Presentation in 19th-Century Narrative Fiction, 155–64. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190212360.003.0006.
Full textAbstract:
The sixth chapter illustrates how the automatic annotation of the different modes of speech, writing, and thought presentation in 19th-century narrative fiction may be performed on the basis of repetitive lexico-grammatical features and by setting up rules based on the manual annotation of the corpus and facilitating it in larger data sets. The chapter proposes a number of formal diagnostic features for the identification of discourse presentation as well as procedures to help their automatic detection. The procedures described serve as basis for a tool for the automatic identification of discourse presentation which can be adopted to programs like Wmatrix (Rayson 2018) and WordSmith Tools (Scott 2017). The chapter furthermore critically reflects on the limits of automated procedures and the necessity to manually check the annotations and include contextual information for unambiguous identification of different types of discourse presentation.
10
Fronczak, Katarzyna. "Blogi w dyskursie korporacyjnym: język, rola i funkcje." In Języki specjalistyczne w komunikacji interkulturowej. Wydawnictwo Uniwersytetu Łódzkiego, 2020. http://dx.doi.org/10.18778/8220-071-3.06.
Full textAbstract:
The subject of this paper is the presentation of corporate blogs as a new form of corporate communication, their linguistic and discursive characteristics and the role they perform in corporate communication. The analyses of corporate blogs combine corpus linguistics methodologies (McEnery, Wilson 1996) and discourse analysis (Partington, Duguid, Taylor 2013) with the use of corpus tools, such as computational programs „Wmatrix4” (Rayson 2008) and „Word Smith 4.0” (Scott 1996), necessary to conduct quantitative analyses. The research material constitutes a corpus of English-language corporate blogs, compiled by the author, which consists of 500 randomly selected corporate blog posts taken from the corporate blogs run by ten top corporations from the field of Business Process Outsourcing and Information Technology. The study is the first attempt at a systematic and detailed linguistic description of corporate blogs. The results show that corporate blogs are unique texts due to their hybrid nature. In addition, it has been demonstrated that they fulfil promotional, persuasive as well as advisory and informative functions. Also, corporate blogs are used to reinforce corporate culture, corporate identity and corporate image. As a result, the authors of corporate blogs provide their readers with the impression of a more personal type of communication, which departs from a typical business model, as well as attract and persuade them to maintain and strengthen the business relationship. The results of the study provided an up-to-date, systematic and detailed description of the language used in corporate blogs, their role and functions in corporate discourse as well as their generic status.
Conference papers on the topic "Rayson"
1
Rafter, Roxanne. "Raymond." In ACM SIGGRAPH 2007 computer animation festival. New York, New York, USA: ACM Press, 2007. http://dx.doi.org/10.1145/1281740.1281842.
Full text
2
Hone, Daniel W. "35 Years of Condensed Matter and Related Physics." In Raymond L Orbach Symposium. WORLD SCIENTIFIC, 1996. http://dx.doi.org/10.1142/9789814530644.
Full text
3
Beyermann, W. P., N. L. Huang-Liu, and D. E. MacLaughlin. "Random Magnetism High-Temperature Superconductivity." In Raymond L Orbach Inauguration Symposium. WORLD SCIENTIFIC, 1994. http://dx.doi.org/10.1142/9789814534246.
Full text
4
Petavy, Francois. "Rayman --- no parking." In ACM SIGGRAPH 99 Electronic art and animation catalog. New York, New York, USA: ACM Press, 1999. http://dx.doi.org/10.1145/312379.313060.
Full text
5
Peake, Steven, Russell Ellis, and Bernard Broquere. "2007 Update: Sustainable Carbonized Rayon for SRM Nozzles." In 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2007. http://dx.doi.org/10.2514/6.2007-5774.
Full text
6
Jaeglé, P. "Lasers à rayons X." In Les lasers et leurs applications scientifiques et médicales. Les Ulis, France: EDP Sciences, 1996. http://dx.doi.org/10.1051/sfo/1996001.
Full text
7
Boury, Didier, F. Bouvier, and A. Chevrollier. "C2b Rayon Source Requalification for Carbon Phenolic Nozzle Insulators." In 47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2011. http://dx.doi.org/10.2514/6.2011-6133.
Full text
8
Peake, Steven, Russell Ellis, and Bernard Broquere. "Update: Sustainable Carbonized Rayon for Solid Rocket Motor Nozzles." In 42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2006. http://dx.doi.org/10.2514/6.2006-4598.
Full text
9
Rodrigues, Luiz A., Elias P. Duarte Jr., and Luciana Arantes. "Exclusão Mútua Distribuída e Robusta para k Recursos Compartilhados." In Workshop de Testes e Tolerância a Falhas. Sociedade Brasileira de Computação - SBC, 2012. http://dx.doi.org/10.5753/wtf.2012.23079.
Full textAbstract:
Este trabalho apresenta uma solução robusta de k-exclusão mútua em sistemas distribuídos sujeitos a falhas de crash. O algoritmo proposto é baseado no algoritmo de Raymond. Para propagar as mensagens de requisição de forma escalável, foi desenvolvido um algoritmo de árvore geradora mínima. A árvore é criada de forma distribuída, com base nas informações fornecidas por um mecanismo auxiliar de monitoramento de estados dos processos. A solução proposta melhora a eficiência do algoritmo de Raymond na obtenção de recursos e garante o seu funcionamento para até n-1 processos falhos.
10
Alfonso-Solar, David, Paula Bastida-Molina, Lina Montuori, and Carlos Vargas-Salgado. "Monitoring and evaluation of thermal comfort in urban areas: application to Valencia city." In CARPE Conference 2019: Horizon Europe and beyond. Valencia: Universitat Politècnica València, 2019. http://dx.doi.org/10.4995/carpe2019.2019.10198.
Full textAbstract:
In this paper, it is presented preliminary results of a methodology for thermal comfort monitoring and evaluation in urban areas based on local metering of ambient conditions and Rayman model application. In the framework of GROWGREEN European project it was installed six monitoring stations for data acquisition of air temperature, relative humidity, wind speed, solar radiation and black globe temperature. Data of first 5 months of monitoring and modelling of one location with Rayman model to calculate PET (physiological equivalent temperature) is presented. Based on PET it was calculated the percentage of hours with thermal comfort per month, and it was made a comparison between PET and black globe temperature (GT) in order to evaluate the suitability of GT as a single, low cost and robust indicator of thermal comfort in urban areas.
Reports on the topic "Rayson"
1
Lane, L. S. Bedrock geology, Mount Raymond, Yukon, NTS 116-I/8. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329963.
Full textAbstract:
The Mount Raymond map area incorporates the western limb of the Richardson anticlinorium, southern Richardson Mountains, northern Yukon. It is underlain by four Paleozoic sedimentary successions: middle Cambrian Slats Creek Formation, Cambrian to Early Devonian Road River Group, Devonian Canol Formation, and Late Devonian to Carboniferous Imperial and Tuttle formations. The Richardson trough depositional setting of the first three successions is succeeded by a deep-marine, turbiditic, Ellesmerian, orogenic foredeep setting for the Imperial-Tuttle succession. Several major thrust faults and related folds transect the map area from north to south. The carbonate-dominated Road River Group defines a west-dipping homocline, modified by the Mount Raymond thrust fault together with minor folds in its footwall. In the overlying Imperial-Tuttle succession, map-scale folds are defined where shales are interbedded with persistent sandstones. Steep reverse faults in the east may have reactivated Cambrian rift faults. The structural geometry reflects Late Cretaceous-Cenozoic regional Cordilleran tectonism.
2
Venegas, Nataly, and Pedro Díaz. Vitamina D y obesidad en los niño/as. Universidad Autónoma de Chile, August 2022. http://dx.doi.org/10.32457/12728/1016420221.
Full textAbstract:
La vitamina D o 25OH(D) es un micronutriente esencial para la absorción de calcio. Los humanos tenemos en nuestra piel un precursor, el cual por acción de los rayos UV ☀️ se transforma en vitamina D3. Luego, producto de diversas reacciones en el hígado se produce la forma biológicamente activa llamada 25OH(D).
3
BLAIR MUNHOFEN, N. RAYMOND DAVIS AND THE SOLAR NEUTRINOS. Office of Scientific and Technical Information (OSTI), February 2003. http://dx.doi.org/10.2172/810864.
Full text
4
Chapagain, Saroj, Geetha Mohan, and Kensuke Fukushi. Water for Sustainable Development Casebook: Recognising the Value of Water for Sustainable Development. United Nations University Institute for the Advanced Study of Sustainability, 2022. http://dx.doi.org/10.53326/pznf3984.
Full textAbstract:
This casebook presents the outcomes of the Water for Sustainable Development (WSD) research project implemented by the United Nations University Institute for the Advanced Study of Sustainability (UNU-IAS) to improve regional environmental and economic policies in the case study countries. The project investigated the role of water in the sustainable development of four locations in Asia: Bali Province, Indonesia; Kaski District, Nepal; Visakhapatnam City, India; and Rayong Province, Thailand. Based on an Input-Output (IO) analysis, the research findings provide a comprehensive matrix of intersectoral dependence, in terms of economy, water consumption, and pollution loads, and offer policy directives for controlling water pollution. The publication is aimed at policymakers, water practitioners, researchers, and students interested in learning and utilising the analytical framework developed by WSD.
5
Bravo, Jerónimo. Cristalografía de rayos X de macromoléculas. Sociedad Española de Bioquímica y Biología Molecular (SEBBM), February 2012. http://dx.doi.org/10.18567/sebbmdiv_rpc.2012.02.1.
Full text
6
Lane, L. S. Bedrock geology, Mount Raymond, Yukon, NTS 116-I/8. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2020. http://dx.doi.org/10.4095/290066.
Full text
7
Tao, Yang, Victor Alchanatis, and Yud-Ren Chen. X-ray and stereo imaging method for sensitive detection of bone fragments and hazardous materials in de-boned poultry fillets. United States Department of Agriculture, January 2006. http://dx.doi.org/10.32747/2006.7695872.bard.
Full textAbstract:
As Americans become increasingly health conscious, they have increased their consumptionof boneless white and skinless poultry meat. To the poultry industry, accurate detection of bonefragments and other hazards in de-boned poultry meat is important to ensure food quality andsafety for consumers. X-ray imaging is widely used for internal material inspection. However,traditional x-ray technology has limited success with high false-detection errors mainly becauseof its inability to consistently recognize bone fragments in meat of uneven thickness. Today’srapid grow-out practices yield chicken bones that are less calcified. Bone fragments under x-rayshave low contrast from meat. In addition, the x-ray energy reaching the image detector varieswith the uneven meat thickness. Differences in x-ray absorption due to the unevenness inevitablyproduce false patterns in x-ray images and make it hard to distinguish between hazardousinclusions and normal meat patterns even by human visual inspection from the images.Consequently, the false patterns become camouflage under x-ray absorptions of variant meatthickness in physics, which remains a major limitation to detecting hazardous materials byprocessing x-ray images alone.Under the support of BARD, USDA, and US Poultry industries, we have aimed todeveloping a new technology that uses combined x-ray and laser imaging to detect bonefragments in de-boned poultry. The technique employs the synergism of sensors of differentprinciples and has overcome the deficiency of x-rays in physics of letting x-rays work alone inbone fragment detection. X-rays in conjunction of laser-based imaging was used to eliminatefalse patterns and provide higher sensitivity and accuracy to detect hazardous objects in the meatfor poultry processing lines.Through intensive research, we have met all the objectives we proposed during the researchperiod. Comprehensive experiments have proved the concept and demonstrated that the methodhas been capable of detecting frequent hard-to-detect bone fragments including fan bones andfractured rib and pulley bone pieces (but not cartilage yet) regardless of their locations anduneven meat thickness without being affected by skin, fat, and blood clots or blood vines.
8
Cohen, Andrew J. B. Hydrogeologic characterization of a fractured granitic rock aquifer, Raymond, California. Office of Scientific and Technical Information (OSTI), October 1993. http://dx.doi.org/10.2172/10115406.
Full text
9
Blume, M. Scattering of X-Rays. Office of Scientific and Technical Information (OSTI), May 2016. http://dx.doi.org/10.2172/1253960.
Full text
10
Lipkin, H. J. Gamma rays for pedestrians. Office of Scientific and Technical Information (OSTI), May 1987. http://dx.doi.org/10.2172/6474138.
Full text