Download Besieged: An Encyclopedia of Great Sieges From Ancient Times by Paul K. Davis PDF

By Paul K. Davis

From precedent days to the current, nice sieges have had an important influence at the shaping of global background. Now, during this fabulous, fully-illustrated quantity, 100 of the world's such a lot huge and mind-boggling sieges are specified by detail.Besieged covers crucial sieges from around the globe all through heritage - from Joshua's attack on Jericho within the 15th century B.C. to the Russian assault at the Chechen capital of Grozny on the finish of the 20 th. every one access offers the identify and date of the siege, its exactlocation by way of present day international, the variety of forces engaged, while recognized, the names of the commanders on either side, and the final significance of the siege in its old context. completely reading the activities of either the attackers and the defenders, the ebook explores the motivations ofboth, and strategically surveys the technical and tactical ideas and stipulations either inside of besieged positions and within the besiegers' ranks. The entries aspect the historic atmosphere, the actual situations of the development itself, and the long term result of the siege. those rivetingaccounts are more desirable by means of illustrations, over seventy maps, and references for extra examining. A word list and a finished index whole the book.Global in scope, and with stirring bills of normal sieges in addition to many lesser recognized conflicts, Besieged is key examining for army buffs and everybody drawn to how the fashionable international got here to be.

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The most commonly used fibrous fillers are glass fibers and, recently, a variety of natural fibers. Carbon black has long been considered a nanofiller. More recent additions, rapidly moving to commercial markets, are nanoclays such as montmorillonite and hydrotalcite, a variety of oxides, and nanofibers such as single- or multiple-wall carbon nanotubes. 3 Particle morphology of fillers. Shape Aspect ratio Example Cube Sphere Block Plate Flake Fiber 1 1 1–4 4–30 50–200 þ þ 20–200 þ þ Feldspar and calcite Glass spheres Quartz, calcite, silica, and barite Kaolin, talc, and hydrous alumina Mica, graphite, and montmorillonite nanoclays Wollastonite, glass fibers, carbon nanotubes, wood fibers, asbestos fibers, and carbon fibers j13 j 1 Polymers and Polymer Composites 14 advanced nanocomposites; the first are single layers of carbon atoms tightly packed in a honeycomb structure [12], whereas the second are naturally occurring nanotubes produced by surface weathering of aluminosilicate minerals [13].

Depending on the type of filler, other polymer properties could be affected; for example, melt viscosity could be significantly increased through the incorporation of fibrous materials. On the other hand, mold shrinkage and thermal expansion would be reduced, a common effect of most inorganic fillers. The term reinforcing filler has been coined to describe discontinuous additives, the form, shape, and/or surface chemistry of which have been suitably modified with the objective of improving the mechanical properties of the polymer, particularly strength.

Additives for polymer composites have been variously classified as reinforcements, fillers, or reinforcing fillers. Reinforcements, being much stiffer and stronger than the polymer, usually increase its modulus and strength. Thus, mechanical property modification may be considered as their primary function, although their presence may significantly affect thermal expansion, transparency, thermal stability, and so on. Continuous composites contain long fiber or ribbon reinforcements mostly in thermosetting matrices; when prearranged in certain geometric patterns, they may become the major component of the composite (they can constitute as much as 70% by volume in oriented composites).

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