Photoacoustic imaging taking into account thermodynamic attenuation

Photoacoustic imaging taking into account thermodynamic attenuation

In this paper we consider a mathematical model for photoacoustic imaging which takes into account attenuation due to thermodynamic dissipation. The propagation of acoustic (compressional) waves is governed by a scalar wave equation coupled to the heat equation for the excess temperature. We seek to recover the initial acoustic profile from knowledge of acoustic measurements at the boundary. We ...

Compensation of Ultrasound Attenuation in Photoacoustic Imaging

Photoacoustic imaging is a non-destructive method to obtain information about the distribution of optically absorbing structures inside a semitransparent medium. It is based on thermoelastic generation of ultrasonic waves by the absorption of a short laser pulse inside the sample. From the ultrasonic waves measured outside the object, the interior distribution of absorbed energy is reconstructe...

Thermodynamic Calculation of a Dual Screw Compressor Based on Experimentally Measured Values Taking Supercharge into Account

Taking Handicap into Account: Systemic Features

Because of many features of handicap, such as the number of actors and interactions, the complexity of the field, handicap must be considered from a system point of view, and dealt with as any system. That makes it possible to build a comprehensive response to the question of the inclusion and full citizenship of people with disabilities, better than some fragmentary solutions often proposed. T...

Analysing forensic processes: Taking time into account

A great deal of forensic psychology concerns sequences of behaviours or events. In this paper, we review some recent efforts to examine forensic issues as sequences, discuss some of the contemporary methodologies involved, and highlight some of the lessons that emerge from this research. Specifically, we show: (i) how research on public violence has benefited from studying incidents as patterns...