513 research outputs found
Multiple scattering of light in optical diagnostics of dense sprays and other complex turbid media
No full textSprays and other industrially relevant turbid media can be quantitatively and qualitatively characterized using modern optical diagnostics. However, current laser
based techniques generate errors in the dense region of sprays due to the multiple scattering of laser radiation e ected by the surrounding cloud of droplets. In most industrial
sprays, the scattering of light occurs within the so-called intermediate scattering regime
where the average number of scattering events is too great for single scattering to be
assumed, but too few for the di usion approximation to be applied. An understanding
and adequate prediction of the radiative transfer in this scattering regime is a challenging
and non-trivial task that can significantly improve the accuracy and e ciency of optical
measurements. A novel technique has been developed for the modelling of optical radiation propagation in inhomogeneous polydisperse scattering media such as sprays. The
computational model is aimed to provide both predictive and reliable information, and
to improve the interpretation of experimental results in spray diagnostics. Results from
simulations are verified against the analytical approach and validated against the experiment by the means of homogeneous solutions of suspended polystyrene spheres. The
ability of the technique to simulate various detection conditions, to di erentiate scattering orders and to generate real images of light intensity distributions with high spatial
resolution is demonstrated. The model is used for the real case of planar Mie imaging
through a typical hollow cone water spray. Versatile usage of this model is exemplified
with its applications to image transfer through turbid media, correction of experimental
Beer-Lambert measurements, the study of light scattering by single particles in the farfield region, and to simulate the propagation of ultra-short laser pulses within complex
scattering media. The last application is fundamental for the development and testing
of future optical spray diagnostics; particularly for those based on time-gating detection
such as ballistic imaging
Edouard Roditi Collection 1931-1980
No full textThe collection documents professional activities of Edouard Roditi as an art historian and critic and consists of manuscripts, notes, research files, and a wealth of art catalogues, press release, photographs, and exhibit invitations. There are manuscripts by Roditi as well as by other authors on such topics as Jewish artists in France, Sephardic Jews, and other. Correspondence collected here includes Roditi’s professional correspondence with individuals as well as organizations.However, the bulk of the collection consists of art catalogues, press release, photographs, and exhibit invitations dealing with Jewish artists in France. These materials have not been microfilmed and are available in the original form. There are no personal materials that shed light on Eduard Roditi’s life, nor any materials pertaining to his work as an interpreter for the Nuremberg trial, or San Francisco Conference, during which the United Nations Organization was established.Edouard Roditi was born in France into an American family. He was educated in England, France, Germany, and in the United States. During WWII and shortly after he worked for a number of United States agencies. He was an author as well as a well established art critic and a translator. - Edouard Roditi died on May 10, 1992, at the age of 81.Photographs removed to Photograph Collectiondigitize
Crossed source-detector geometry for a novel spray diagnostic: Monte Carlo simulation and analytical results
No full textSprays and other industrially relevant turbid media can be quantitatively
characterized by light scattering. However, current optical diagnostic
techniques generate errors in the intermediate scattering regime where the
average number of light scattering is too great for the single scattering to be
assumed, but too few for the diffusion approximation to be applied. Within this
transitional single-to-multiple scattering regime, we consider a novel crossed
source-detector geometry that allows the intensity of single scattering to be
measured separately from the higher scattering orders. We verify Monte Carlo
calculations that include the imperfections of the experiment against analytical
results. We show quantitatively the influence of the detector numerical aperture
and the angle between the source and the detector on the relative intensity of
the scattering orders in the intermediate single-to-multiple scattering regime.
Monte Carlo and analytical calculations of double light-scattering intensity are
made with small particles that exhibit isotropic scattering. The agreement
between Monte Carlo and analytical techniques validates use of the Monte Carlo
approach in the intermediate scattering regime. Monte Carlo calculations are
then performed for typical parameters of sprays and aerosols with anisotropic
(Mie) scattering in the intermediate single-to-multiple scattering regime
Un pharmacien limousin à l'esprit inventif : Antoine-Edouard Peyrusson
No full textEin erfinderischen Apotheker aus dem Limousin : Antoine-Édouard Peyrusson.
Édouard Peyrusson (1841-1909), Professor an der « École de Médecine et de Pharmacie » von Limoges, Offizinapotheker, geboren und verstorben in dieser Stadt, ist Autor von verschiedene Arbeiten über Keramik, sowie Inhaber von zahlreichen Erfindungs- oder Verbesserungs-patenten von elektrischen Akkumulatoren und Elektrolyseapparaten .A pharmacist from Limoges with an inventive mind : Antoine-Edouard Peyrusson.
Born and died in Limoges, professor at the School of Medicine and Pharmacy in that city, Edouard Peyrusson (1841-1909), retail pharmacist, was the author of works on ceramics and of numerous invention patents on the perfecting of electrolytic cells and of electrolyzers.Saumande Pierre. Un pharmacien limousin à l'esprit inventif : Antoine-Edouard Peyrusson. In: Revue d'histoire de la pharmacie, 77ᵉ année, n°283, 1989. pp. 327-332
Edouard Vuillermoz and Dix Pièces Mélodiques
No full textabstract: ABSTRACT
Edouard Vuillermoz (1869-1939) was a horn player and teacher who studied and later taught at the Paris Conservatory during the early twentieth century. As did many of the professors from the Conservatory, Vuillermoz published works for the horn. Unfortunately, his name has largely faded into obscurity and most of his works are no longer in print, yet one has remained in the repertoire and is still available for purchase today—Dix Pièces Mélodiques. Published in 1927 by Alphonse-Leduc, Vuillermoz desired for his students a set of etudes that would teach mastery of transposition, but he was not a composer. The ten transposition exercises he created were selected and transcribed from a compilation of vocalises commissioned by a vocal professor at the Conservatory, Amédée-Louis Hettich (1856-1937).
Hettich desired vocalise-etudes that would able aid and inspire his students, so he commissioned over one-hundred-fifty vocalises by modern composers during the first half of the twentieth century. Composers including Bozza, Copland, Dukas, Fauré, Messiaen, Nielsen, Ravel, and Tomasi answered his call for works between 1906 and 1938. These modern vocalise-etudes have since disappeared from the vocal repertoire. Now, a century later, many of these studies have entered the public domain and are resurfacing as instrumental transcriptions and concert etudes. This study promotes awareness of Edouard Vuillermoz’s Dix Pièces Mélodiques and advocates for their inclusion in a modern revival.Dissertation/ThesisDoctoral Dissertation Music 201
S-Nitrosylation in Organs of Mice Exposed to Low or High Doses of γ-Rays: The Modulating Effect of Iodine Contrast Agent at a Low Radiation Dose
No full textThe covalent addition of nitric oxide (NO•) onto cysteine thiols, or S-nitrosylation, modulates the activity of key signaling proteins. The dysregulation of normal S-nitrosylation contributes to degenerative conditions and to cancer. To gain insight into the biochemical changes induced by low-dose ionizing radiation, we determined global S-nitrosylation by the “biotin switch” assay coupled with mass spectrometry analyses in organs of C57BL/6J mice exposed to acute 0.1 Gy of cesium-137 γ-rays. The dose of radiation was delivered to the whole body in the presence or absence of iopamidol, an iodinated contrast agent used during radiological examinations. To investigate whether similar or distinct nitrosylation patterns are induced following high-dose irradiation, mice were exposed in parallel to acute 4 Gy of cesium-137 γ rays. Analysis of modulated S-nitrosothiols (SNO-proteins) in freshly-harvested organs of animals sacrificed 13 days after irradiation revealed radiation dose- and contrast agent-dependent changes. The major results were as follows: (i) iopamidol alone had significant effects on S-nitrosylation in brain, lung and liver; (ii) relative to the control, exposure to 0.1 Gy without iopamidol resulted in statistically-significant SNO changes in proteins that differ in molecular weight in liver, lung, brain and blood plasma; (iii) iopamidol enhanced the decrease in S-nitrosylation induced by 0.1 Gy in brain; (iv) whereas a decrease in S-nitrosylation occurred at 0.1 Gy for proteins of ~50 kDa in brain and for proteins of ~37 kDa in liver, an increase was detected at 4 Gy in both organs; (v) mass spectrometry analyses of nitrosylated proteins in brain revealed differential modulation of SNO proteins (e.g., sodium/potassium-transporting ATPase subunit beta-1; beta tubulins; ADP-ribosylation factor 5) by low- and high-dose irradiation; and (vi) ingenuity pathway analysis identified major signaling networks to be modulated, in particular the neuronal nitric oxide synthase signaling pathway was differentially modulated by low- and high-dose γ-irradiation.Peer reviewe
Les petits mystères de l'Opéra /
No full textMachine stamped binding of brown fine diaper embossed cloth. Front board decorated with gilt stamped title, author and vignette of a ballerina.Two of the illustrations are by Edouard de Beaumont.Illustrated t.p.Mode of access: Internet
Structured Laser Illumination Planar Imaging: New horizons for the study of spray dynamics, thermometry and droplet sizing
No full textThefirst reported applications of laser sheet imaging for the study of atomizing sprays date from the mid 1980th.Since those early tries, blurring effects from the light being scattered multiple times by the surrounding dropletswere already observed and reported. While s trategies in suppressing part of this multiple light scatteringcontribution, were known for transmission imaging (e. spatial Fourier filtering, polarization filtering, time gating)no robust solution was found for laser sheet imaging until the developme nt of Structured Laser Illumination PlanarImaging ( in 2008.Theoriginality of SLIPI resides in using a laser sheet with a spatially modulated light intensity. This light structureencodes the incident illumination beam which can be then decoded a fter image recording. As multiply scatteredphotons have “short memory” they do lose the modulation information while singly scattered photons fullypreserve it. Therefore the two components, single and multiple scattering, can be separated using a demodul ationpost processing algorithm on the recorded images.Thisarticle is a review of the SLIPI technique from its earliest to latest developments. It describes the traditional wayof applying structured illumination using three modulated sub images and its use for averaged imaging of dropletsizes, extinction coefficients and spray thermometry. Recently the technique has been adapted for single shotapplications in order to study spray dynamics and liquid breakups. This is performed using two modulated subimage s instead of three, known as 2p SLIPI, opening new horizons for the study of spray dynamics, single shotdropl et sizing and thermometry, even through optically dense situations
Implications of the U.S. Farm Act on Canadian Agriculture
No full textThis paper addresses the implications of the U.S. Farm Security and Rural Investment Act of 2002 or "Farm Act" for Canadian agriculture. The Farm Act, which is expected to add at least US $45 billion in new price supports over its six-year timeframe, is expected to harm the position of less-subsidized and non-subsidized producers in Canada and other countries. Canadian farm products will be less competitive not only domestically, but also in the U.S. and in third-country markets. Canada will be most affected by subsidies for corn, soybeans, wheat, and pulse crops. New country-of-origin labeling rules under the Farm Act are also expected to be disruptive to Canadian livestock exports. In addressing these issues the paper also explores potential Canadian responses - including filing WTO or NAFTA complaints - as well as the broader implications for U.S.-Canada trade and international cooperation.U.S. Farm Bill, U.S.-Canada trade, Agricultural and Food Policy, International Relations/Trade,
Edouard Pichon et les patois
No full textInternational audienceAbstract. Edouard Pichon and the " patois ". Mobilized as a doctor during the First World War, Edouard Pichon kept in touch by mail with his uncle Jacques Damourette, the co-author for their Essai de grammaire de la langue française. In his letters of the year 1915, he tells him about his studies of dialects and regional languages. Using lists of words and conjugation paradigms, he seeks to find in the forms of Picard, Franco-Provençal, Catalan and Languedocian the proof of a permanence of the French mentality through these different speeches. Drawing on what he hears from the inhabitants of the Santerrois and soliciting various soldiers as informants, he preferred a philological method to study Provençal in Mistral's Mirèio. Using an idiosyncratic notation of sounds, Pichon has a differentialistic approach. He sees dialects as the prosodic interpretation of the same language, French, as an " affective " melody whose " representative " function would remain constant by the effect of racial atavism. Thus, grammar becomes an illustration of a theory that makes languages, and links between them, the proof of a transcendence of the race on social formations. If there are affinities between French, Occitan, Breton and Alsatian, it is not the result of contact but the persistence of a common biological substrate. In this respect, Pichon opposes Gaston Paris's historicalist vision of Romance languages and Antoine Meillet's sociological principles.Mobilisé comme médecin pendant la Première guerre mondiale, Edouard Pichon est resté en relation épistolaire avec son oncle et collaborateur pour l'Essai de grammaire de la langue française, Jacques Damourette. Dans une série de missives de l'année 1915, il lui fait part des études qu'il mène sur les dialectes et les langues régionales. A partir de listes de mots et de paradigmes de conjugaison, il cherche à retrouver dans les formes du picard, du franco-provençal, du catalan et du languedocien la preuve d'une permanence de la mentalité française à travers ses différents parlers. Mettant à contribution ce qu'il entend chez les habitants du santerrois et sollicitant comme informateurs les militaires des unités dans lesquelles il est affecté, il revient à une approche philologique en étudiant le provençal dans Mirèio de Mistral. Utilisant une notation phonétique idiosyncrasique, Pichon a une approche différentialiste. Il conçoit les dialectes comme l'interprétation prosodique, « affective », d'une même langue, le français, dont la fonction « représentative » resterait constante par l'effet d'un atavisme racial. Ainsi la grammaire devient l'illustration d'une théorie qui fait des langues, et des rapprochements entre elles, la preuve d'une transcendance des propriétés de race sur les formations sociales. S'il y a des affinités entre le français, l'occitan, le breton et l'alsacien, ce n'est pas un effet de contact mais la rémanence d'un substrat biologique commun. A ce titre, Pichon s'oppose à la vision historiciste de Gaston Paris en romanistique comme aux principes sociologiques d'Antoine Meillet
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