Patterns of behavior in lodgings exposed to traffic noise

Threshold values for public services interferent on the attenuation to noise nuisance were defined. Daily life at home was described and collected on the use of residences, the effects of noise on health and sleep, and the incidence of running away from home. A correlation was made with the equipment and noise insulation of homes. It is shown that there are behavior patterns in the modification of considerable manner in the way of life for people who live in apartments and in individual houses, above 66 dB during daytime

Regimes of low-frequency variability in a three-layer quasi-geostrophic ocean model

The temporal variability of the midlatitude double-gyre wind-driven ocean circulation is studied in a three-layer quasi-geostrophic model over a broad range in parameter space. Four different types of flow regimes are found, each characterized by a specific time-mean state and spatio-temporal variability. As the lateral friction is decreased, these regimes are encountered in the following order: the viscous antisymmetric regime, the asymmetric regime, the quasi-homoclinic regime and the inertial antisymmetric regime. The variability in the viscous and the inertial antisymmetric regimes (at high and low lateral friction, respectively) is mainly caused by Rossby basin modes. Low-frequency variability, i.e.on interannual to decadal time-scales, is present in the asymmetric and quasi-homoclinic regime and can be related to relaxation oscillations originating from low-frequency gyre modes. The focus of this paper is on the mechanisms of the transitions between the different regimes. The transition from the viscous antisymmetric regime to the asymmetric regime occurs through a symmetry-breaking pitchfork bifurcation. There are strong indications that the quasi-homoclinic regime is introduced through the existence of a homoclinic orbit. The transition to the inertial antisymmetric regime is due to the symmetrization of the time-mean state zonal velocity field through rectification effects

Collaborative Research: Robust Climate Projections and Stochastic Stability of Dynamical Systems

The project was completed along the lines of the original proposal, with additional elements arising as new results were obtained. The originally proposed three thrusts were expanded to include an additional, fourth one. (i) The e#11;ffects of stochastic perturbations on climate models have been examined at the fundamental level by using the theory of deterministic and random dynamical systems, in both #12;nite and in#12;nite dimensions. (ii) The theoretical results have been implemented #12;first on a delay-diff#11;erential equation (DDE) model of the El-Nino/Southern-Oscillation (ENSO) phenomenon. (iii) More detailed, physical aspects of model robustness have been considered, as proposed, within the stripped-down ICTP-AGCM (formerly SPEEDY) climate model. This aspect of the research has been complemented by both observational and intermediate-model aspects of mid-latitude and tropical climate. (iv) An additional thrust of the research relied on new and unexpected results of (i) and involved reduced-modeling strategies and associated prediction aspects have been tested within the team's empirical model reduction (EMR) framework. Finally, more detailed, physical aspects have been considered within the stripped-down SPEEDY climate model. The results of each of these four complementary e#11;fforts are presented in the next four sections, organized by topic and by the team members concentrating on the topic under discussion

Recherches sur la motricité du rumen chez les petits Ruminants V. — Oscillations de l'amplitude des contractions dans les conditions normales

Le Bars Henri, Lebrument J., Simonnet Henri. Recherches sur la motricité dit rumen chez les petits Ruminants. Y. Oscillations de l'amplitude des contractions dans les conditions normales. In: Bulletin de l'Académie Vétérinaire de France tome 107 n°2, 1954. pp. 69-73

Dynamical origin of low-frequency variability in a highly nonlinear midlatitude coupled model

Author Posting. © American Meteorological Society 2006. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Climate 19 (2006): 6391–6408, doi:10.1175/JCLI3976.1.A novel mechanism of decadal midlatitude coupled variability, which crucially depends on the nonlinear dynamics of both the atmosphere and the ocean, is presented. The coupled model studied involves quasigeostrophic atmospheric and oceanic components, which communicate with each other via a constant-depth oceanic mixed layer. A series of coupled and uncoupled experiments show that the decadal coupled mode is active across parameter ranges that allow the bimodality of the atmospheric zonal flow to coexist with oceanic turbulence. The latter is most intense in the regions of inertial recirculation (IR). Bimodality is associated with the existence of two distinct anomalously persistent zonal-flow modes, which are characterized by different latitudes of the atmospheric jet stream. The IR reorganizations caused by transitions of the atmosphere from its high- to low-latitude state and vice versa create sea surface temperature anomalies that tend to induce transition to the opposite atmospheric state. The decadal–interdecadal time scale of the resulting oscillation is set by the IR adjustment; the latter depends most sensitively on the oceanic bottom drag. The period T of the nonlinear oscillation is 7–25 yr for the range of parameters explored, with the most realistic parameter values yielding T ≈ 20 yr. Aside from this nonlinear oscillation, an interannual Rossby wave mode is present in all coupled experiments. This coupled mode depends neither on atmospheric bimodality, nor on ocean eddy dynamics; it is analogous to the mode found previously in a channel configuration. Its time scale in the model with a closed ocean basin is set by cross-basin wave propagation and equals 3–5 yr for a basin width comparable with the North Atlantic.This research was supported by NSF Grant OCE-02-221066 (all coauthors) and DOE Grant DE-FG-03-01ER63260 (MG and SK)

Étude d'une unité de grands-parentaux dans un élevage de lapins hybrides, premiers résultats

International audienc

La perfusion des organes digestifs. Méthode d'étude de l'absorption

Le Bars Henri, Mollé J., Rérat Alain, Simonnet Henri. La perfusion des organes digestifs. Méthode d'étude de l'absorption. In: Bulletin de l'Académie Vétérinaire de France tome 111 n°6, 1958. pp. 305-310

Étude de la motricité du rumen chez les petits ruminants VI. — Influence de l’ingestion d’urée

Annicolas D., Le Bars Henri, Nugues J., Simonnet Henri. Étude de la motricité du rumen chez les petits ruminants VI. — Influence de l’ingestion d’urée. In: Bulletin de l'Académie Vétérinaire de France tome 109 n°5, 1956. pp. 257-261

Toxicité de l’urée chez les petits ruminants

Annicolas D., Le Bars Henri, Nugues J., Simonnet Henri. Toxicité de l’urée chez les petits ruminants. In: Bulletin de l'Académie Vétérinaire de France tome 109 n°5, 1956. pp. 225-232

Absorption des acides aminés au niveau du rumen de l’intestin grêle et du caecum chez le mouton

Demaux G., Le Bars Henri, Mollé J., Rérat Alain, Simonnet Henri. Absorption des acides aminés, au niveau du rumen, de l’intestin grêle et du cæcum chez le Mouton. In: Bulletin de l'Académie Vétérinaire de France tome 114 n°2, 1961. pp. 85-88