background and aims. the aim of this study was to compare flexural strength of specimens processed by conventional and injection-molding techniques. materials and methods. conventional pressure-packed pmma was used for conventional pressure-packed and injection-molded pmma was used for injection-molding techniques. after processing, 15 specimens were stored in distilled water at room temperatur...

acrylic resin denture bases undergo dimensional changes during polymerization. injection molding techniques are reported to reduce these changes and thereby improve physical properties of denture bases. the aim of this study was to compare dimensional changes of specimens processed by conventional and injection-molding techniques.sr-ivocap triplex hot resin was used for conventional pressure-pa...

Seawater ultrafi ltration (UF) as a pretreatment of reverse osmosis (RO) process in a thermal power plant was investigated using a 100 kDa hollow fi ber membrane. The choice of the UF physical backwash conditions remains arbitrary or ensuing from a sensibility study. As the optimum must take into account the factors interactions, we led a response surface study to analy...

A fundamental question is whether Turing machines can model all reasoning processes. We introduce an existence principle stating that the perception of the physical existence of any Turing program can serve as a physical causation for the application of any Turing-computable function to this Turing program. The existence principle overcomes the limitation of the outputs of Turing machines to li...

Living marine organisms have spent most of their evolutionary time history as single cells, at scales dominated by viscous force. As life evolved toward a larger and more mobile multicelled organism, inertial forces also became important. Hence, microscale organisms in the ocean have experienced small-scale fluid motions throughout their entire existence on Earth. In this chapter we consider ho...

modification of the radiative fluxes in the atmosphere and at the Earth’s surface; release and consumption of latent heat related to phase changes of water either directly inside the clouds or in precipitation generated in them; transport of heat, moisture, momentum and atmospheric trace constituents over large distances in the vertical in convectively generated clouds; modification of the surf...