Les supports médiatiques du discours religieux

in Nouveaux Actes Sémiotiques (2008, December 17)

Cet article interroge la relation intermédiale entre peinture et photographie, et notamment la transformation des pratiques de réception liées à la transduction de certaines iconographies religieuses d’un ... [more ▼]

Cet article interroge la relation intermédiale entre peinture et photographie, et notamment la transformation des pratiques de réception liées à la transduction de certaines iconographies religieuses d’un médium à l’autre. Il décrit les effets de sens que les textes picturaux et photographiques engendrent lorsqu’ils sont censés représenter non seulement l’invisible, mais aussi la transcendance. Si la peinture religieuse a toujours été légitimée à représenter Jésus-Christ, les saints et les visions de l’au-delà, la photographie artistique a au contraire subi des « contraintes interprétatives » attribuées par la doxa à sa genèse à empreinte. Si la doxa a donc relégué les textes photographiques artistiques à la seule fonction de représenter l’« ici-et-maintenant », le cas de la photo dévotionnelle est différent. En effet, la photographie dévotionnelle, engendrant des pratiques productives, interprétatives et communicationnelles tout à fait différentes de celles de la photo artistique, a mis en scène une autre conception du médium photographique, qui le met en communication étroite avec la syntaxe figurative de l’icône, ou même avec le saint suaire de Turin – image qui n’est pas faite de main d’homme (acheiropoïètes) et qui devient support d’une révélation sans médiation. [less ▲]

Supports visuels réalisés dans le cadre des travaux pratiques de Chimie Analytique (Partie II)

Learning material (2008)

Plusieurs vidéos (étalonnage des pipettes, argentimétrie: méthode de Fajans et argentimétrie: méthode de Mohr) illustrent les manipulations des travaux pratiques de 2ème Baccalauréat en Sciences ... [more ▼]

Plusieurs vidéos (étalonnage des pipettes, argentimétrie: méthode de Fajans et argentimétrie: méthode de Mohr) illustrent les manipulations des travaux pratiques de 2ème Baccalauréat en Sciences pharmaceutiques. [less ▲]

Suppressing aeroelastic instability by means of broadband targeted energy transfers, part 2: Experiments

in AIAA Journal (2007), 45(10), 2391-2400

This paper presents experimental results corroborating the analysis developed in the companion paper, Part I (Lee, Y., Vakakis, A., Bergman, L., McFarland, M., and Kerschen G., "Suppression Aeroelastic ... [more ▼]

This paper presents experimental results corroborating the analysis developed in the companion paper, Part I (Lee, Y., Vakakis, A., Bergman, L., McFarland, M., and Kerschen G., "Suppression Aeroelastic Instability Using Broadband Passive Targeted Energy Transfers, Part 1: Theory," AIAA Journal, Vol. 45, No. 3, 2007, pp. 693-711), and demonstrates that a nonlinear energy sink can improve the stability of an aeroelastic system. The nonlinear energy sink was, in this case, attached to the heave (plunge) degree of freedom of a rigid airfoil which was supported in a low-speed wind tunnel by nonlinear springs separately adjustable in heave and pitch. This airfoil was found to exhibit a at flow speeds above the critical ('flutter") speed of 9.5 m/s, easily triggered by an initial heave displacement. After attachment of a single degree of freedom, essentially nonlinear energy sink to the wing, the combined system exhibited improved dynamic response as measured by the reduction or elimination of limit cycle oscillation at flow speeds significantly greater than the wing's critical speed. The design, application, and performance of the nonlinear energy sink are described herein, and the results obtained are compared to analytical predictions. The physics of the interaction of the sink with the wing is examined in detail. [less ▲]

La suppression du nœud de Keith-Flack

in Bulletin de l'Académie Royale de Médecine de Belgique (1926), VI

Suppression of a +1 T Mutation by a Nearby Substitution in the Mitochondrial Cox1 Gene of Chlamydomonas Reinhardtii: A New Type of Frameshift Suppression in an Organelle Genome

in Molecular & General Genetics [=MGG] (1998), 259(3), 294-8

In Chlamydomonas reinhardtii, mutants defective in the cytochrome pathway of respiration lack the capacity to grow under heterotrophic conditions (in darkness on acetate). In the dark- strain duM18, a + 1 ... [more ▼]

In Chlamydomonas reinhardtii, mutants defective in the cytochrome pathway of respiration lack the capacity to grow under heterotrophic conditions (in darkness on acetate). In the dark- strain duM18, a + 1 T addition in a run of four Ts, located at codon 145 of the mitochondrial cox1 gene encoding subunit I of cytochrome c oxidase, is responsible for the mutant phenotype. A leaky revertant (su11) that grows heterotrophically at a lower rate than wild-type cells was isolated from dum18. Its respiration sensitivity to cyanide was low and its cytochrome c oxidase activity was only 4% of that of the wild-type enzyme. Meiotic progeny obtained from crosses between revertant and wild-type cells inherited the phenotype of the mt- parent, showing that the suppressor mutation, like dum18 itself, is located in the mitochondrial genome. In order to map the su11 mutation relative to dum18, a recombinational analysis was performed on the diploid progeny. It demonstrated that su11 was very closely linked to the dum18 mutation less than 20-30 bp away. The cox1 gene of the su11 revertant was then sequenced. In addition to the + 1 T frameshift mutation still present at codon 145, an A-->C substitution was found at codon 146, leading to the replacement of a glutamic acid by an alanine in the polypeptide chain. No other mutations were detected in the cox1 coding sequence. As the new GCG codon (Ala) created at position 146 is very seldom used in the mitochondrial genome of C. reinhardtii, we suggest that the partial frameshift suppression by the nearby substitution is due to an occasional abnormal translocation of the ribosome (+ 1 base shift) facilitated both by the run of Ts and the low level of weak interaction of alanyl-tRNA. [less ▲]

Suppression of limit cycle oscillations with a nonlinear energy sink: experimental results

in 47th AIAA Structural Dynamics and Materials Conference, Newport, 2006 (2006)

The presence of limit cycle oscillations within the flight envelopes of existing aircraft is well documented. Future air vehicle designs are also likely to encounter limit cycle oscillations under certain ... [more ▼]

The presence of limit cycle oscillations within the flight envelopes of existing aircraft is well documented. Future air vehicle designs are also likely to encounter limit cycle oscillations under certain loading conditions. These steady-state constant amplitude oscillations are detrimental to mission effectiveness and lead to increased fatigue of aircraft structures. Previous efforts to suppress limit cycle oscillations have focused primarily on active control methods. These efforts have been effective but require significant measurement and control resources. In this study the investigators test a passive method for suppressing limit cycle behavior. A nonlinear energy sink, based on the principle of nonlinear energy pumping, is shown to be effective for increasing the stability threshold of a nonlinear two degree of freedom aeroelastic system. [less ▲]

Suppression of matching field effects by splay and pinning energy dispersion in YBa2Cu3O7 with columnar defects

in Physical Review. B : Condensed Matter (2001), 63(14),

We report measurements of the irreversible magnetization M-i of a large number of YBa2Cu3O7 single crystals with columnar defects (CD). Some of them exhibit a maximum in M-i when the density of vortices ... [more ▼]

We report measurements of the irreversible magnetization M-i of a large number of YBa2Cu3O7 single crystals with columnar defects (CD). Some of them exhibit a maximum in M-i when the density of vortices equals the density of tracks, at temperatures above 40 K. We show that the observation of these matching field effects is constrained to those crystals where the orientational and pinning energy dispersion of the CD system lies below a certain threshold. The amount of such dispersion is determined by the mass and energy of the irradiation ions, and by the crystal thickness. Time relaxation measurements show that the matching effects are associated with a reduction of the creep rate, and occur deep into the collective pinning regime. [less ▲]

Suppression Of Tumor Growth And Cell Proliferation By P13(Ii), A Mitochondrial Protein Of Human T Cell Leukemia Virus Type 1

in Proceedings of the National Academy of Sciences of the United States of America (2004), 101(17),

Suppressions of temporalis muscle activity and their modulations by transcranial magnetic stimulations may reflect direct excitation of the trigeminal nerve or ganglion, and not cortical activation

in Olesen, J.; Schoenen, Jean (Eds.) Tension-Type Headache: classification, mechanisms and treatment (Frontiers in Headache Research) (1993)

Supraconductivité : un modèle pour les sciences du vivant ?

Article for general public (1995)