A self-mixing laser sensor design with an extended kalman filter for optimal online structure analysis and damping evaluation

We have developed a new algorithm based on the extended Kalman filter, in order to improve the resolution of an optical displacement sensor. This new non contact sensor which provides vibration measurement with a very good accuracy might be used for online quality control by measuring the damping of excited mechanical structure. This self-mixing sensor subject to weak feedback has been tested in comparison with a commercial vibrometer, to measure the frequency response function of a plate with a passive damping to be characterized, in order to show the efficiency of a damping treatment

Comparaison d'estimateurs de fréquence à complexité algorithmique réduite

De nombreux algorithmes, basés sur une modélisation Auto Régressive du signal, ont été proposés pour des problèmes d'estimation de fréquence de signaux périodiques. Nous nous intéressons ici aux performances statistiques de tels estimateurs, et proposons des formules approchées du biais et de la variance des estimées. Les résultats obtenus permettent de mettre en évidence l'influence de la fréquence recherchée, du rapport signal sur bruit et du nombre de points sur les performances de l'estimateur

Time-budget and location of activities in the paddock can be estimated from GPS-data

Time-budget and location of activities in the paddock can be estimated from GPS-data. 10. International Symposium on the Nutrition of Herbivores (ISNH

Mesure de vitesse acoustique particulaire en champ libre par anémométrie laser Doppler

- Cette étude présente une méthode d'estimation de la vitesse particulaire acoustique et de la vitesse de convection par Anémométrie Laser à effet Doppler (ALD). Ces paramètres sont estimés grâce à l'utilisation conjointe d'une technique de démodulation synchrone en quadrature et d'un estimateur basé sur la dérivée de la phase du signal Doppler. Enfin, cette méthode est appliquée à la mesure des paramètres de la vitesse acoustique en champ libre pour une excitation sinusoïdale

Hepatocyte and keratinocyte growth factors and their receptors in human lung emphysema

BACKGROUND: Hepatocyte and keratinocyte growth factors are key growth factors in the process of alveolar repair. We hypothesized that excessive alveolar destruction observed in lung emphysema involves impaired expression of hepatocyte and keratinocyte growth factors or their respective receptors, c-met and keratinocyte growth factor receptor. The aim of our study was to compare the expression of hepatocyte and keratinocyte growth factors and their receptors in lung samples from 3 groups of patients: emphysema; smokers without emphysema and non-smokers without emphysema. METHODS: Hepatocyte and keratinocyte growth factor proteins were analysed by immunoassay and western blot; mRNA expression was measured by real time quantitative polymerase chain reaction. RESULTS: Hepatocyte and keratinocyte growth factors, c-met and keratinocyte growth factor receptor mRNA levels were similar in emphysema and non-emphysema patients. Hepatocyte growth factor mRNA correlated negatively with FEV1 and the FEV1/FVC ratio both in emphysema patients and in smokers with or without emphysema. Hepatocyte and keratinocyte growth factor protein concentrations were similar in all patients' groups. CONCLUSION: The expression of hepatocyte and keratinocyte growth factors and their receptors is preserved in patients with lung emphysema as compared to patients without emphysema. Hepatocyte growth factor mRNA correlates with the severity of airflow obstruction in smokers

Analyse de la fonction de transfert de cavites gyrometriques acoustiques et de leurs transducteurs

SIGLEAvailable from INIST (FR), Document Supply Service, under shelf-number : T 84603 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Heat Conduction Effects on the Acoustic Response of a Membrane Separated by a Very Thin Air Film from a Backing Electode

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The impact of parental benefits on disadvantaged households

International audienceOver the past 25 years, the Government of Quebec (Canada) has introduced a number of relatively novel policies aimed at fighting poverty such as the Universal Child Care Program (UCCP) in 1997 and the Quebec Parental Insurance Program (QPIP) in 2006. Since its inception, the QPIP has provided a means‐tested supplementary benefits scheme for disadvantaged households. The scheme yields a well‐defined kink in the benefits schedule with respect to two entirely exogenous criteria. Using the QPIP administrative data files from 2006 to 2017, we estimate the causal impact of the supplemental benefits on leave duration and participation of poor households within a sharp Regression Kink Design (RKD) approach. Our results indicate that single mothers are relatively responsive to additional benefits. Conversely, partnered mothers are not found to respond to the supplemental benefits, irrespective of fathers’ own participation in the parental leave. The Canadian government is currently considering introducing a similar parental leave program. Our results may prove useful for the design of the program

Long-range optical instruments for high resolution monitoring of natural and geoindustrial sites in harsh environments

International audienc

Long-range optical instruments for high resolution monitoring of natural and geoindustrial sites in harsh environments

International audienc