The Virgo gravitational wave detector is an interferometer with 3 km long arms in construction near Pisa in Italy. The accessible sources at the design sensitivity and main noises are reviewed. Virgo ...has devoted a significant effort to extend sensitivity to low frequency reaching the strain level h̃ = 10
−21 Hz
−1/2 at 10 Hz while at 200 Hz h̃ = 3 · 10
−23 Hz
−1/2. Design choices and status of construction are presented.
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IJS, IMTLJ, KILJ, KISLJ, NUK, SBCE, SBJE, UL, UM, UPCLJ, UPUK
The commissioning of the VIRGO central interferometer occasioned the implementation and tests of various algorithms for the characterization of the non-Gaussianity, non-stationarity and non-linearity ...of the dark fringe data. This library of prototypes will serve as groundwork for the near commissioning of VIRGO (full scale). We make a summary of the activities on that subject including the description of the selected algorithms and some results obtained with the data of the engineering runs.
Mortality in cases of severe asthma attacks in children is evaluated at 1%. During initial medical care, repeated evaluation of clinical and para-clinical severity criteria constitutes the main ...therapeutic guide. Emergency care treatment is based mainly on oxygen therapy, bronchodilatory therapy by discontinuous inhalation, and general corticotherapy. Intravenous theophylline treatment is controversial. The response after a few hours should allow a decision to be made 1 to follow up with outpatient treatment (rapid marked improvement), 2 to continue the hospital treatment (stabilization), or 3 to transfer to intensive care (worsening, exhaustion). In the intensive care unit, the treatment is based on continuous intravenous administration of beta 2 mimetics in addition to the above therapies. The objective is to avoid resorting to assisted ventilation. When this proves necessary, it must not be detrimental; controlled alveolar hypoventilation allows dynamic hyper-inflation linked to ventilation to be reduced. Prevention of relapse is indispensable. This requires hospitalization in a specialized care unit after discharge from intensive care.
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