Ultrasonic imaging systems usually require an array of ultrasonic transducers for data acquisition on a wide area on top of an object under investigation. The goal of an imaging algorithm is the use of reflected ultrasound data to form a recognizable image. Conventional algorithms like SAFT are based on an inverse Huygens' principle and need therefore a dense measurement grid. This requires a b...

We report on (to our knowledge) the first remote contactless photoacoustic measurements on semitransparent polymer samples. Samples consisting of a semitransparent polymer surface, black silicon glue and cast resin were produced. Measurements were done by illuminating the samples with short electromagnetic pulses of infrared radiation and detecting the generated ultrasound waves with a Fabry-Pé...

We develop a classical density functional for water which combines the White Bear fundamental-measure theory (FMT) functional for the hard sphere fluid with attractive interactions based on the statistical associating fluid theory variable range (SAFT-VR). This functional reproduces the properties of water at both long and short length scales over a wide range of temperatures and is computation...

Measurement of tris(hydroxymethyl)aminomethane buffers and blood samples was used to compare the following commercial pH instruments: Corning Models 160 and 165, Instrumentation Laboratory, Inc. Model 313, and Radiometer Models E5021 and BMS 3MK2. These comparisons uncovered a systematic bias of 0.02 pH units in Instrumentation Laboratory, Inc. electrodes manufactured before April 1973. Other f...

We have performed a combined experimental and theoretical study of the thermodynamic properties of semifluorinated alkanes. In particular, the liquid density of perfluorohexylhexane (F6H6) and perfluorohexyloctane (F6H8) has been measured as a function of temperature from 273.15 to 353.15 K and at four temperatures as a function of pressure up to 600 bar. The results were interpreted using the ...

Various approaches are reviewed that use scaled particle theories to describe dumbbell fluids made of tangent or overlapped hard spheres. Expressions encountered in the literature written a form similar presented thermodynamic perturbation theory introduced by Wertheim for chains and developed statistical associating fluid (SAFT). Analogies differences observed these two types theoretical descr...