Coevolution between pairs of different kind of entities, such as providers and users of information, involves reciprocal selection pressures between them as a consequence of their ecological interaction.
The accumulator inlet pressure p a is determined by the gas absolute pressure p g and the pressure difference between them.
Due to the capillary pressure difference between them, hydrocarbon migrates inwards.
b Albite porphyroblasts formed at close to peak metamorphic conditions were pulled apart during return flow, and quartz was precipitated by pressure solution between them.
Evaluation of intraspecific genetic variation in Phytophthora concomitant with equivalent studies of host genetic variation could allow the relationships between host genotype variability, Phytophthora genotype and the selection pressures acting between them to be established.
Three crystalline structures (phases II, IV, and I) are observed at atmospheric pressure with transitions between them occurring at 19 and 30 °C.
Layers of basalt formed columns, and the pressure between these columns sculpted them into polygonal shapes that vary from 15 to 20 inches (38 to 51 cm) in diameter and measure up to 82 feet (25 metres) in height.
Specific conclusions are developed about different degrees of regime inertia, the ebb and flow of external pressures, the relative importance of economic and socio-political pressures, and interactions between them.
The wheel cylinders are located between the movable ends of the brake shoes, and each is fitted with two pistons that are forced outward toward the ends of the cylinder by the pressure of the fluid between them.
