Scintillation produced in liquid xenon by alpha particles and gamma rays has been studied as a function of applied electric field. For back scattered gamma rays with energy of about 200 keV, the number of scintillation photons was found to decrease by 64±2% with increasing field strength. Consequently, the pulse shape discrimination power between alpha particles and gamma rays is found to reduc...

Alpha planes are used to compose objects in order to build synthetic images. They contain the shape and the transparency of the diierent objects. The scene is composed by superimposing objects in a given order. The alpha planes specify the transparencies of the objects. In order to independently compress these objects, the alpha planes must also be coded. In this paper, we present a way of codi...

The uncertainty in measurements of gross alpha and beta activities in water samples by liquid scintillation counting with alpha/beta discrimination has been evaluated considering the problems typical of low-level measurements of environmental samples. The use of a pulse shape analysis device to discriminate alpha and beta events introduces a correlation between some of the input quantities, and...

The oldest known game tree search algorithm Alpha-Beta is still the most popular one. All other algorithms in this area fall short of Alpha-Beta in one or more of the following three desired characteristics high pruning power, low storage requirement and low execution time. This paper discusses how revisit of nodes can be used effectively in game tree search. A few strategies of introducing rev...

Biaxial nematic and biaxial smectic phases were found in a colloidal model system of goethite (alpha-FeOOH) particles with a simple boardlike shape and short-range repulsive interaction. The macroscopic domains were oriented by a magnetic field and their structure was revealed by small angle x-ray scattering. In accordance with theoretical predictions, biaxiality appears in a system with partic...