According to the B-theory, the passage of time is an illusion. Although times are objectively ordered, with every time earlier or later than every other, no time is objectively past, present or future. The A-theory, by contrast, says that time passes. Here I shall use the term ‘A-theory’ to include any ‘dynamic’ view of time; the term thus encompasses presentism, growing block theories and shri...

The death occurred on the 2nd November, at 4-59 a.m. at his residence, in the little village of Ayot St. Lawrence, of this great man of arts, letters, philosophy, satire and controversy, at the ripe old age of 94. In living to this age, G. B. S. divorced age from senility successfully. Our interest no. 1 lies in recording this fact. Longevity without senility is the objective of to-day's medici...

In this study, constraint groove pressing (CGP) process and ultrasonic assisted CGP (UCGP) process were investigated on the process forces, mechanical properties of the sheet, including hardness and tensile tests and grain size. Pure copper sheets were used as samples in this research. Samples were tested both with and without ultrasonic vibrations for mechanical properties and grain size up to...

The application of magnesium alloys is greatly limited because of their relatively low strength and ductility. An effective way to improve the mechanical properties of magnesium alloy is to refine the grains. As the race for better materials performance is never ending, attempts to develop viable techniques for microstructure refinement continue. Further refining of grain size requires, however...

The evolution of texture was discussed during the formation of ultra-fine and nano grains in a magnesium alloy severely deformed through accumulative back extrusion (ABE). The microstructure and texture obtained after applying multiple deformation passes at temperatures of 100 and 250°C were characterized. The results showed that after single ABE pass at 100°C an ultrafine/nano grained microstr...