The permeability of the preform composite materials used in liquid molding processes such as resin transfer molding and structural reaction injection molding is a complex function of weave pattern and packing characteristics. The development of tools for predicting permeability as a function of these parameters is of great industrial importance. Such capability would speed process design and op...

language and culture are now deemed to be co-constitutive; hence english language teaching (elt) textbooks should incorporate cultural aspects and promote intercultural competence. however, careful decisions should be made as regards to the cultural content of materials and the ways in which culture is represented. this study was an attempt to deconstruct the patterns of cultural representation...

permeability is a property of porous medium that quantifies rock capacity to transmit fluids. frequently, core based permeability data are not available either because of the borehole conditions or due to the high cost of coring. for these reasons, over the years attempts have been made to estimate permeability by alternative ways. permeability is an elusive parameter in hydrocarbon reservoirs ...

Carl Sandburg, in his "The People, Yes," writes of the meeting of an Indian and a white man. The latter, impressed with his own importance, draws a small circle in the sand and says, "This is what the white man knows." The Indian, the much wiser of the two, draws an enormous circle and then correctly points out, "This is where the white man and the red man know nothing." Sandburg's story is an ...

The fact that flat principal circle bundles are characterized by having zero real Euler classes has proved important in recent years in understanding whether total spaces of vector bundles over nonnegatively curved manifolds must support metrics with nonnegative curvature as well (see Theorem 6.3 and the discussion afterwards). Unfortunately, the proofs of this fact of which we are aware use ei...

Nucleic acid amplification is a hugely important technology for biology and medicine. While the polymerase chain reaction (PCR) has been highly useful and effective, its reliance on heating and cooling cycles places some constraints on its utility. For example, the heating step of PCR can destroy biological molecules under investigation and heat/cool cycles are not applicable in living systems....