Classicist. A casualty of the minimalist creed, Contreras quit making art in 1972 when he’d reduced his image to a dot. He began again in 1997. USC Fisher Gallery, Harris Hall. Hours: Tuesday through Saturday, noon to 5 p.m. Free. 213-740-4561

Recent developments in photo-detectors and photo-detector systems are reviewed. The main emphasis is made on Silicon Photo-Multipliers (SiPM) novel and very attractive photo-detectors. Their main features are described. Properties of detectors manufactured by different producers are compared. Different applications are discussed including calorimeters, muon detection, tracking, Cherenkov light ...

The first Micro Gallery opened at the National Gallery in London on July 21st 1991. The first facility of its kind, it provided visitors with a comprehensive multimedia reference to the Gallery's collection. Since then the author and his colleagues have had the privilege of working on two further projects of a similar nature. The Image Gallery at the San Diego Museum of Art opened on October 26...

We present a measurement of the rate of gluon splitting into bottom quarks, g → bb̄, in hadronic Z decays collected by SLD from 1996 to 1998. The analysis was performed by looking for secondary bottom production in 4-jet events of any primary flavor. A topological vertex mass technique was used to tag the two jets with the smallest angle between them as b/b̄. We obtained a rate of g → bb̄ per hadr...

We consider combinatorial problems motivated by sensor networks for beacon-based point-to-point routing and covering. A beacon b is a point that can be activated to effect a ‘magnetic pull’ toward itself everywhere in a polygonal domain P . The routing problem asks how many beacons are required to route between any pair of points in a polygonal domain P . In simple polygons with n vertices we s...

nano-cus powders were synthesized with chemical solution method. xrd and sem and spectrophotometry were used for characterization of the cus powders. xrd analysis indicated that tetragonal cus was the main phase with particle size of 16.2nm and little cu2s phase was present. scanning electron microscopy (sem) analysis revealed that powder was plate like and had very little aspect ratio in morph...