Biomedical subjects

Enrico Marchetti

Publications and source records attributed to Enrico Marchetti.

3 recordsLinked to original sources

PubMed2004

Layer-oriented simulation tool.

The Layer-Oriented Simulation Tool (LOST) is a numerical simulation code developed for analysis of the performance of multiconjugate adaptive optics modules following a layer-oriented approach. The LOST code computes the atmospheric layers in terms of phase screens and then propagates the phase delays introduced in the natural guide stars' wave fronts by using geometrical optics approximations. These wave fronts are combined in an optical or numerical way, including the effects of wave-front sensors on measurements in terms of phase noise. The LOST code is described, and two applications to layer-oriented modules are briefly presented. We have focus on the Multiconjugate adaptive optics demonstrator to be mounted upon the Very Large Telescope and on the Near-IR-Visible Adaptive Interferometer for Astronomy (NIRVANA) interferometric system to be installed on the combined focus of the Large Binocular Telescope.

Journal Article↗

PubMed2002

Optical design of the wide angle camera for the Rosetta mission.

The final optical design of the Wide Angle Camera for the Rosetta mission to the P/Wirtanen comet is described. This camera is an F/5.6 telescope with a rather large 12 degrees x 12 degrees field of view. To satisfy the scientific requirements for spatial resolution, contrast capability, and spectral coverage, a two-mirror, off-axis, and unobstructed optical design, believed to be novel, has been adopted. This configuration has been simulated with a ray-tracing code, showing that theoretically more than 80% of the collimated beam energy falls within a single pixel (20" x 20") over the whole camera field of view and that the possible contrast ratio is smaller than 1/1000. Moreover, this novel optical design is rather simple from a mechanical point of view and is compact and relatively easy to align. All these characteristics make this type of camera rather flexible and also suitable for other space missions with similar performance requirements.

Journal Article↗

PubMedDate not supplied

[The concept of health in Italian occupational health legislation].

This study describes the evolution of the concept of health in Italian occupational health legislation (1900-2001). Mental health dimensions at work (such as reduction in monotony and repetitiveness, mental risks in pregnancy and so on) were introduced only recently. This can be explained with: 1) poor working conditions; 2) the delay of the occupational health community in including mental health in the concept of health; 3) the gap between scientific knowledge of risk factors for mental health and legislation aimed at prevention.

Health↗