Phase transformation of BeS and equation-of-state studies to 96 GPa

We report the existence of a reversible first-order phase transition of BeS from the zinc-blende structure, B3, to the nickel-arsenide structure, B8, at 51 GPa with a volume change of 11%. The NiAs phase remains stable up to at least 96 GPa. A second-order Birch equation describes the equation of state of the B3 phase with B o ϭ105 GPa and B o Јϭ3.5. Preliminary studies of BeO to 66 GPa are described. ͓S0163-1829͑97͒07346-3

Phase transformation of BeS and equation-of-state studies to 96 GPa

We report the existence of a reversible first-order phase transition of BeS from the zinc-blende structure, B3, to the nickel-arsenide structure, B8, at 51 GPa with a volume change of 11%. The NiAs phase remains stable up to at least 96 GPa. A second-order Birch equation describes the equation of state of the B3 phase with B_o = 105GPa and B′_o = 3.5. Preliminary studies of BeO to 66 GPa are described

Investigative queries in sensor networks

Sensor networks have widespread range of applications these days. New computing locations, new needs and fresh applications have instigated new problems and exciting challenges. The view of sensor network as a distributed database and the sensor node as a table is being widely accepted by the database community. There now exists wide variety of data models and query processing methods to acquire data from sensor networks. This paper identifies a new class of query, named the investigative query, owing to needs of few special applications. Classifying sensor network query processing from communication perspective, defining the new class of query and architecture requirements for processing the same, this paper gives an application of those queries in urban water distribution management and concludes with future directions