Stochastic and Deterministic Bundles

We consider a bundle determined by a classifying map with skeleton smooth in the Chen — Souriau sense. We show that the stochastic classifying map is homotopic to a deterministic classifying map on the Holder loop space.Розглядаються розшарування, що визначаються класифікуючим відображенням із скелетом, гладким у сенсі Chen - Souriau. Показано, що стохастичне класифікуюче відображення гомотопне детерміністичному класифікуючому відображенню на просторах гьольдерових петель

The psychometric properties of the CFSS-DS for schoolchildren in Saudi Arabia:a confirmatory factor analytic approach

Aim to test the psychometric properties of an Arabic version of the Child Fear Survey Schedule‐Dental Subscale (CFSS‐DS) a using confirmatory factor analysis. Methods 2 convenience samples were obtained: Sample [1]: 600 boys (33%) and girls attending 4 public schools in Onizah and Sample [2] 800 girls attending 8 public schools in Buridah. The questionnaire asked the participant's age, gender and completion of the CFSS‐DS. The data were subjected to exploratory factor analysis (EFA), parallel factor analysis, Cronbach alpha, confirmatory factor analysis (CFA) and goodness of fit statistics. Results 513 children in Sample [1] and 503 children in Sample [2] participated giving a valid response rate of 86% and 67% respectively. From the EFA 3 factors were identified and confirmed statistically using parallel factor analysis. The internal consistency of the 3‐factors, dental fear subscale (0.86); hospital fear subscale (0.77) and stranger fear subscale (0.71) was good. The CFA showed that the current EFA model was an equivalent fit to the El Housseiny et al1 model, however, the solution using El Housseiny et al's structure was distorted. Conclusions A 3‐factor structure with acceptable reliability exists for this Arabic version of the CFSS‐DS, confirmed by a CFA using an additional data set.PostprintPeer reviewe

Falling vocal intonation signals speaker confidence and conditionally boosts persuasion

People are often advised to project confidence with their bodies and voices to convince others. Prior research has focused on the high and low thinking processes through which vocal confidence signals (e.g., fast speed, falling intonation, low pitch) can influence attitude change. In contrast, this research examines how the vocal confidence of speakers operates under more moderate elaboration levels, revealing that falling intonation only benefits persuasion under certain circumstances. In three experiments, we show that falling (vs. rising) vocal intonation at the ends of sentences can signal speaker confidence. Under moderate elaboration conditions, falling (vs. rising) vocal intonation increased message processing, bolstering the benefit of strong over weak messages, increasing the proportion of message-relevant thoughts, and increasing thought-attitude correspondence. In sum, the present work examined an unstudied role of vocal confidence in guiding persuasion, revealing new processes by which vocal signals increase or fail to increase persuasion

Time separation as a hidden variable to the Copenhagen school of quantum mechanics

The Bohr radius is a space-like separation between the proton and electron in the hydrogen atom. According to the Copenhagen school of quantum mechanics, the proton is sitting in the absolute Lorentz frame. If this hydrogen atom is observed from a different Lorentz frame, there is a time-like separation linearly mixed with the Bohr radius. Indeed, the time-separation is one of the essential variables in high-energy hadronic physics where the hadron is a bound state of the quarks, while thoroughly hidden in the present form of quantum mechanics. It will be concluded that this variable is hidden in Feynman's rest of the universe. It is noted first that Feynman's Lorentz-invariant differential equation for the bound-state quarks has a set of solutions which describe all essential features of hadronic physics. These solutions explicitly depend on the time separation between the quarks. This set also forms the mathematical basis for two-mode squeezed states in quantum optics, where both photons are observable, but one of them can be treated a variable hidden in the rest of the universe. The physics of this two-mode state can then be translated into the time-separation variable in the quark model. As in the case of the un-observed photon, the hidden time-separation variable manifests itself as an increase in entropy and uncertainty.Comment: LaTex 10 pages with 5 figure. Invited paper presented at the Conference on Advances in Quantum Theory (Vaxjo, Sweden, June 2010), to be published in one of the AIP Conference Proceedings serie

SIMUUTION D'ENVIRONNEMENT EN ACOUSTlQUE SOUS-MARINE

In onder to realize a complete geoacustical mode1 of the sea and the seafloor, a simulation of the seabed and of the bathycelerimetric profile is needed. Two kinds of synthetic resin have been selected to simulate the seabed. Tbe first kind is a polyurethane resin DF 1013. It behaves as a fluid and therefore realizes an accurate reproduction of the sedimentary layers The second is a filled polyester resin and behaves as the rocky botbom To repoduce the bathycelerimetric profile we have showed (cf Barkhatov) that a diffuson technique makes it possible to obtain, in a iiquid layer,a vertical variation of celerity. Acustical mamements have validated this results.Pour réaliser une maquette de la mer et du fond nous avons procédé en deux étapes. Tout d'abord, à l'aide de résines synthétiques nous avons fabriqué des dalles simulant les différents types de fonds raicontrés en mer (sable et roches). Par une techhnique dite de "diffusion" nous avons réussi, en superposant des liquides de masse volumique décroissante, à simuler un profil bathycélérimétrique avec un creux de vitesse comme en mer. Dans ces deux parties des comparaisons théorie-expérience ont validé tous les résultats

Modélisation expérimentale et numérique de milieux marins réels

In order to realize a complete geoacoustical model of the sea we have created a vertical variation in the sound velocity in a liquid layer presenting a minimum like in real sea by a diffusion technique in a tank. This technique involves the superimposing of several layers of miscible liquids with different densities without mixing. To simulate the sea bottom (with or without a 5 % slope) we have used two types of material - Polyurethane resin to represent a sedimentary ground and marble to represent an elastic rock. To account for the scale, the measures were made at a frequency of 1 MHz corresponding to 50 Hz in a real situation. The measured values are compared with the results of a numerical integration of the Helmholtz equation. We use a variant of the parabolic approximation