flatness
71Die (manufacturing) — For the thread cutting tool, see Tap and die. A die is a specialized tool used in manufacturing industries to cut or shape material using a press. Like molds, dies are generally customized to the item they are used to create. Products made with… …
72False vacuum — In quantum field theory, a false vacuum is a metastable sector of space that appears to be a perturbative vacuum, but is unstable due to instanton effects that may tunnel to a lower energy state. This tunneling can be caused by quantum… …
73Dither — For other uses, see Dither (disambiguation). Provincial definition of to dither from The Rural Economy of Yorkshire: Comprizing the Management of Landed Estates, and the Present Practice of Husbandry in the Agricultural Districts of that County,… …
74Michael A. Martone — For other people named Michael Martone, see Michael Martone (disambiguation). Michael A. Martone (b. 1955, Fort Wayne, Indiana) is a professor at the creative writing program at the University of Alabama, and is the author of several books. His… …
75No Depression (album) — No Depression Studio album by Uncle Tupelo Released June 21, 1990 …
76Hand scraper — A hand scraper is a single edged tool used to scrape metal from a surface. This may be required where a surface needs to be trued, corrected for fit to a mating part, needs to retain oil (usually on a freshly ground surface), or even to give a… …
77Gauge blocks — (also known as gage blocks, Johansson gauges, slip gauges, or Jo blocks) are precision ground and lapped measuring standards. They are used as references for the setting of measuring equipment such as micrometers, sine bars, dial indicators (when …
78Structure formation — refers to a fundamental problem in physical cosmology. The universe, as is now known from observations of the cosmic microwave background radiation, began in a hot, dense, nearly uniform state approximately 13.7 Gyr ago. [cite journal |author=D.… …
79Africoid peoples — are human populations of varying phenotypes who are considered black regardless of recent African ancestry..Rashidi, Runoko. The Global African Community. The African Perspective in India. 1998. September 2, 2007. [http://saxakali.com/Saxakali… …
80Extreme ultraviolet lithography — (also known as EUV or EUVL ) is a next generation lithography technology using the 13.5 nm EUV wavelength. EUVL opticsEUVL is a significant departure from the deep ultraviolet lithography used today. All matter absorbs EUV radiation. Hence, EUV… …
