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Typical cup and ring marks at Weetwood Moor, in the English county of Northumberland (Google Maps). Cup and ring marks or cup marks are a form of prehistoric art found in the Atlantic seaboard of Europe (Ireland, Wales, Northern England, Scotland, France (), Portugal, and Spain – and in Mediterranean Europe – Italy (in Alpine valleys and Sardinia), Azerbaijan and Greece (Thessaly [citation ...
Various paraphernalia used to smoke crack cocaine, including a homemade crack pipe made out of an empty plastic water bottle.. In a study done by Roland Fryer, Steven Levitt, and Kevin Murphy, a crack index was calculated using information on cocaine-related arrests, deaths, and drug raids, along with low birth rates and media coverage in the United States.
Joseph Chilton Pearce (January 14, 1926 – August 23, 2016) was an American author of a number of books on human development and child development and is best known for his books, The Crack in the Cosmic Egg (1971), Magical Child (1977) and The Bond of Power: Meditation and Wholeness (1981). [1] He preferred the name "Joe". [2]
The manipulation may involve "cracking" (diluting the voting power of the opposing party's supporters across many districts) or "packing" (concentrating the opposing party's voting power in one district to reduce their voting power in other districts). [3] Gerrymandering can also be used to protect incumbents.
Corrosion fatigue is fatigue in a corrosive environment. It is the mechanical degradation of a material under the joint action of corrosion and cyclic loading. Nearly all engineering structures experience some form of alternating stress, and are exposed to harmful environments during their service life.
John Craig Venter (born October 14, 1946) is an American biotechnologist and businessman. He is known for leading one of the first draft sequences of the human genome [1] [2] and assembled the first team to transfect a cell with a synthetic chromosome.
The fracture toughness for plane stress conditions is typically twice as large as that for plane strain. However, because of the rapid rate of growth of a crack near the end of its life, variations in fracture toughness do not significantly alter the life of a component. Crack growth programs typically provide a choice of:
In materials science, fatigue is the initiation and propagation of cracks in a material due to cyclic loading. Once a fatigue crack has initiated, it grows a small amount with each loading cycle, typically producing striations on some parts of the fracture surface.