The role of pasteurella spp and of Mycoplasma bovis in respiratory diseases in young cattle

Lors des essais terrains d’un traitement antibiotique chez des veaux d’éle vage atteints de maladies respiratoires, la flore trachéobronchique a été inven toriée à différentes périodes : à l’arrivée, avant traitement et après guérison. Le rôle de l’association synergique Mycoplasma bovis - Pasteurella haemoly- tica Al apparaît clairement. Les conditions d’élevage et la participation de certains virus (RSV) sont encore des éléments importants de la pathogénèse et du pronostic des bronchopneumonies infectieuses enzootiques.When we tried an antibiotic treatment on clinical trials on weaner calves with respiratory diseases, tracheobronchial flora was examined at different moments : on the day of the arrival, before treatment and after recovery. The role of the synergistic association of Mycoplasma bovis / Pasteurella haemo- lytica A1 in the development of troubles appears to be confirmed. Bad breeding conditions and the participation of a virus (RSV) are important components of pathogenesis and prognosis of bovine Endemic Infectious Broncho pneumonia

Diode-pumped, planar lossless splitter at 1.5 microns for optical networks

We demonstrate the first planar lossless splitter at 1.5µm. The ion-exchanged waveguide circuit in Er/Yb codoped silicate glass achieved 1x2 lossless splitting at 1537nm with a 980 nm laser diode pump

Lossless integrated active splitters for optical networks

We discuss the latest results in the European Union RACE II project LIASON to specify and develop "lossless" splitters in integrated optics, combining an erbium-doped planar amplifier and a passive 1xN cascaded y-junction splitter

Ion-exchanged planar lossless splitter for analog CATV distribution systems at 1.5µm

We demonstrate for the first time an ion-exchanged, planar lossless splitter pumped at 980 nm in an analog CATV distribution system at 1.5 µm

Ion-exchanged planar lossless splitter at 1.5µm

The authors demonstrate the first ion-exchanged, planar lossless splitter at 1.5 /spl mu/m. The 1/spl times/2 device was fabricated by thallium ion exchange in an Er/Yb codoped borosilicate glass and achieved lossless splitting over the wavelength range 1534-1548 nm when pumped with a 980 nm laser diode

High-dimensional Exploratory Item Factor Analysis by A Metropolis–Hastings Robbins–Monro Algorithm

stochastic approximation, SA, item response theory, IRT, Markov chain Monte Carlo, MCMC, numerical integration, categorical factor analysis, latent variable modeling, structural equation modeling,