Hier codes-barres, aujourd’hui puces RFID, traces GPS, e-commerce et automatisation des entrepôts, les innovations numériques bouleversent le secteur logistique et ses manifestations spatiales ...(Hocquelet, 2021). En Occitanie, les pratiques des acteurs de la logistique ne correspondent pas au discours institutionnel (communiqués de presse, documents de planification, réunions et comités notamment) porté par les élus et fonctionnaires territoriaux. D’une part, les chefs d’entreprises et employés du secteur logistique mettent en avant la satisfaction d’un besoin en innovations numériques « incrémentales » et la nécessité de trouver d’autres formes de coordination. D’autre part, le discours institutionnel met en avant des innovations techniques de rupture telles que l’automatisation des entrepôts ou les changements de motorisation. Pour We4LOG, les thématiques du numérique et de l’inclusion d’acteurs associés semblent être peu mobilisées. Pour l’instant, le dispositif cherche sa place dans un réseau complexe d’acteurs et construit ses actions en fonction des ressources disponibles. L’analyse se base sur une investigation poussée des modes de portage du cluster, le rôle des collectivités territoriales dans ces initiatives, leurs objectifs et outils d’actions. Pour mesurer et quantifier le décalage entre le discours sur la logistique et les pratiques, la méthodologie se base sur l’analyse textométrique de 33 entretiens semi-directifs retranscrits, d’articles de presse et de discours politiques ainsi que sur de l’observation participante.
Hier codes-barres, aujourd’hui puces RFID, traces GPS, e-commerce et automatisation des entrepôts, les innovations numériques bouleversent le secteur logistique et ses manifestations spatiales ...(Hocquelet, 2021). En Occitanie, les pratiques des acteurs de la logistique ne correspondent pas au discours institutionnel (communiqués de presse, documents de planification, réunions et comités notamment) porté par les élus et fonctionnaires territoriaux. D’une part, les chefs d’entreprises et employés du secteur logistique mettent en avant la satisfaction d’un besoin en innovations numériques « incrémentales » et la nécessité de trouver d’autres formes de coordination. D’autre part, le discours institutionnel met en avant des innovations techniques de rupture telles que l’automatisation des entrepôts ou les changements de motorisation. Pour We4LOG, les thématiques du numérique et de l’inclusion d’acteurs associés semblent être peu mobilisées. Pour l’instant, le dispositif cherche sa place dans un réseau complexe d’acteurs et construit ses actions en fonction des ressources disponibles. L’analyse se base sur une investigation poussée des modes de portage du cluster, le rôle des collectivités territoriales dans ces initiatives, leurs objectifs et outils d’actions. Pour mesurer et quantifier le décalage entre le discours sur la logistique et les pratiques, la méthodologie se base sur l’analyse textométrique de 33 entretiens semi-directifs retranscrits, d’articles de presse et de discours politiques ainsi que sur de l’observation participante.
The Hubble diagram of type-Ia supernovae (SNe-Ia) provides cosmological constraints on the nature of dark energy with an accuracy limited by the flux calibration of currently available ...spectrophotometric standards. The StarDICE experiment aims at establishing a 5-stage metrology chain from NIST photodiodes to stars, with a targeted accuracy of \SI{1}{mmag} in \(griz\) colors. We present the first two stages, resulting in the calibration transfer from NIST photodiodes to a demonstration \SI{150}{Mpixel} CMOS sensor (Sony IMX411ALR as implemented in the QHY411M camera by QHYCCD). As a side-product, we provide full characterization of this camera. A fully automated spectrophotometric bench is built to perform the calibration transfer. The sensor readout electronics is studied using thousands of flat-field images from which we derive stability, high resolution photon transfer curves and estimates of the individual pixel gain. The sensor quantum efficiency is then measured relative to a NIST-calibrated photodiode. Flat-field scans at 16 different wavelengths are used to build maps of the sensor response. We demonstrate statistical uncertainty on quantum efficiency below \SI{0.001}{e^-/\gamma} between \SI{387}{nm} and \SI{950}{nm}. Systematic uncertainties in the bench optics are controlled at the level of \SI{1e-3}{e^-/\gamma}. Uncertainty in the overall normalization of the QE curve is 1\%. Regarding the camera we demonstrate stability in steady state conditions at the level of \SI{32.5}{ppm}. Homogeneity in the response is below \SI{1}{\percent} RMS across the entire sensor area. Quantum efficiency stays above \SI{50}{\percent} in most of the visible range, peaking well above \SI{80}{\percent} between \SI{440}{nm} and \SI{570}{nm}. Differential non-linearities at the level of \SI{1}{\percent} are detected. A simple 2-parameter model is proposed to mitigate the effect.
Nonlinear effects of acoustic wave propagation and dispersion are observed in a one-dimensional lattice made of Helmholtz resonators connected to a tube. These regularly spaced scatterers exhibit ...individually a wave frequency dependence, which induces a strong velocity dispersion. In addition, they exhibit a wave amplitude dependence (acoustic nonlinearity), which induces nonlinear effects on the dispersion relation of waves in the lattice. The usually observed forbidden frequency band gaps for the transmission coefficient through the lattice are shown to be amplitude dependent. Experimental results are compared to a developed model taking into account the nonlinear behavior of the Helmholtz resonator.
The number of type Ia supernova observations will see a significant growth within the next decade, especially thanks to the Legacy Survey of Space and Time undertaken by the Vera Rubin Observatory in ...Chile. With this rise, the statistical uncertainties will decrease and the flux calibration will become the main uncertainty for the characterization of dark energy. The uncertainty over the telescope transmission is a major systematic when measuring SNe Ia colors. Here we introduce the Collimated Beam Projector (CBP), a device that can measure the transmission of a telescope and its filters. Composed of a tunable monochromatic light source and optics to provide a parallel output beam this device is able to measure with high precision the filter transmissions. In the following, we will show how measuring precisely a telescope transmission can also improve the precision of the dark energy parameters. As an example, we will present the first results of the CBP in the context of the StarDice experiment.
From March 2000 to February 2002, a population-based study of Haemophilus influenzae type b (Hib) meningitis was conducted among children less than five years of age in Hanoi, Vietnam. Children with ...suspected bacterial meningitis were referred to hospitals and each patient underwent standardized clinical examination and microbiologic testing. In Hanoi, 580 children were evaluated for bacterial meningitis and 23 (4%) had confirmed or probable Hib meningitis. The incidence of all Hib meningitis was 12/100,000 child-years less than five years of age and 26/100,000 child-years less than two years of age. Nationally, an estimated 1,005 children less than five years of age are hospitalized for Hib meningitis and 5,107 are hospitalized for Hib pneumonia. Among children with Hib meningitis, at least 100 will develop severe neurologic sequelae and 40 will die. These data suggest there is a substantial burden of Hib disease in Vietnam. National leaders will be provided with these data to facilitate development of national vaccination policies for children in Vietnam.
Smart city models are being promoted worldwide. In particular, modernizing the lighting system, saving electricity and operating costs are the issues that need to be solved in a smart city. In this ...study, we have designed an intelligent lighting system that operates automatically based on calculated human traffic, applying IoT technology and using ESP8266 as the main microcontroller. To calculate human traffic, the YOLOR - a computer vision product is used to analyze and process the images recorded by the camera. The human traffic, after being calculated, is a control signal to operate the light model and use reasonable energy automatically. In addition, the proposed model has been tested in different light intensities. After that, processing performance and system accuracy have been analyzed.
