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In addition , up to 800 U.S. military and contract personnel operating at any time in Colombia are housed at nominally Colombian bases . The response of older columns with nominally identical properties depended largely on the magnitude and history of axial and lateral loads . The a-legal opposition is composed of nominally respectable elements who were in one way or another associated with the Nationalists in the Civil War but are more liberal in orientation than the regime . " There is no doubt that this is probably the greatest and most horrible crime ever committed in the whole history of the world , and it has been done by scientific machinery by nominally civilized men in the name of a great State and one of the leading races of Europe . Focusing on the effects of porosity and microcracking on the physical properties of ceramics , particularly those of nominally single-phase ceramics , this reference and textbook discusses the porosity dependence of mechanical properties , thermal and electrical conductivity , surface area , and permeability of pore systems ; new applications and processing technologies , as well as the engineering trade-offs involved in producing improved porosities ; the applicability and limits and actual experimental data , using pore and microcrack occurrence , characterization , and idealization as bases ; and pore orientation , shape and size heterogeneity , and spatial distribution .