Smart load cells: an industrial application

This paper presents a data acquisition solution using a RISC type microcontroller with a very few components around, taking advantage of the ratiometric functioning of the load cells. The need of thermally stable circuits is minimized through the use of the same amplification chain for both signal and reference. The amplification and filtering are done trough switched-capacitor techniques controlled by the microcontroller. This option allows the choice of the proper scale according to the platform and permits the auto-calibration of the system. The weighing tests show errors below 100 gr in 400 kg for an industrial platform of 8 smart load cells. The paper also describes an example of software calibration of a multi-load cell weigh-bridge using one processor per smart load cell

Biologsiche grondontsmetting : bestrijding van bodemziekten voor een gezonde bodem

Deze brochure geeft bruikbare informatie voor de teler bij de keuze voor biologische grondontsmetting. De gangbare methoden worden op een rij gezet en dit biedt ruimte voor nieuwe wegen in de richting van een voor milieu en teler duurzame oplossin

On the evaluation of sunset-type Feynman diagrams

We introduce an efficient configuration space technique which allows one to compute a class of Feynman diagrams which generalize the scalar sunset topology to any number of massive internal lines. General tensor vertex structures and modifications of the propagators due to particle emission with vanishing momenta can be included with only a little change of the basic technique described for the scalar case. We discuss applications to the computation of $n$-body phase space in $D$-dimensional space-time. Substantial simplifications occur for odd space-time dimensions where the final results can be expressed in closed form through rational functions. We present explicit analytical formulas for three-dimensional space-time.Comment: 45 pages in LaTeX, 3 PostScript figures included in the tex