sieve procedure

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• Sieve analysis — A sieve analysis is a practice or procedure used to assess the particle size distribution of a granular material. The size distribution is often of critical importance to the way the material performs in use. A sieve analysis can be performed on… …   Wikipedia

• sieve of Eratosthenes — Date: 1803 a procedure for finding prime numbers that involves writing down the odd numbers from 2 up in succession and crossing out every third number after 3, every fifth after 5 including those already crossed out, every seventh after 7, and… …   New Collegiate Dictionary

• Eratosthenes, sieve of — ▪ mathematics       systematic procedure for finding prime numbers (prime) that begins by arranging all of the natural numbers (1, 2, 3, …) in numerical order. After striking out the number 1, simply strike out every second number following the… …   Universalium

• ALGOL 68 — Infobox programming language name = ALGOL 68 paradigm = multi paradigm: concurrent bull; imperative year = 1968, last revised 1973 designer = A. van Wijngaarden, B.J. Mailloux, J.E.L. Peck and C.H.A. Koster, et al. developer = latest release… …   Wikipedia

• Gradation test — A gradation test, or sieve analysis, is a commonly used procedure in civil engineering that measures the size distribution, or gradation, of an aggregate, such as sand, crushed rock, or clay. A gradation test is performed on a sample of aggregate …   Wikipedia

• Number theory — A Lehmer sieve an analog computer once used for finding primes and solving simple diophantine equations. Number theory is a branch of pure mathematics devoted primarily to the study of the integers. Number theorists study prime numbers (the… …   Wikipedia

• Activated carbon — Activated carbon, also called activated charcoal, activated coal or carbo activatus, is a form of carbon that has been processed to make it extremely porous and thus to have a very large surface area available for adsorption or chemical reactions …   Wikipedia

• Criba de Eratóstenes — Saltar a navegación, búsqueda La criba de Eratóstenes es un algoritmo que permite hallar todos los números primos menores que un número natural dado N. Se forma una tabla con todos los números naturales comprendidos entre 2 y N y se van tachando… …   Wikipedia Español

• separation and purification — ▪ chemistry Introduction       in chemistry, separation of a substance into its components and the removal of impurities. There are a large number of important applications in fields such as medicine and manufacturing. General principles… …   Universalium

• petroleum refining — Introduction  conversion of crude oil into useful products. History Distillation of kerosene and naphtha       The refining of crude petroleum owes its origin to the successful drilling of the first oil well in Titusville, Pa., in 1859. Prior to… …   Universalium

• Surgery — This article is about the medical specialty. For other uses, see Surgery (disambiguation). A cardiothoracic surgeon performs a mitral valve replacement at the Fitzsimons Army Medical Center. Surgery (from the Greek …   Wikipedia