residual density
81Selection cutting — is the silvicultural practice of harvesting a proportion of the trees in a stand. Selection cutting is the practice of removing mature timber or thinning to improve the timber stand. This system may be used to manage even or uneven aged stands.… …
82Superconducting Radio Frequency — (SRF) science and technology involves the application of electrical superconductors to radio frequency devices. The ultra low electrical loss of the superconductor yields RF resonators with extremely high quality factors, or Q . For example, it… …
83Sewage treatment — The objective of sewage treatment is to produce a disposable effluent without causing harm to the surrounding environment, and also prevent pollution.[1] Sewage treatment, or domestic wastewater treatment, is the process of removing contaminants… …
84Big Bang — This article is about the cosmological model. For the sitcom, see The Big Bang Theory. For other uses, see Big Bang (disambiguation) …
85Igneous rock — Geologic provinces of the world (USGS)   Shield …
86X-ray crystallography — can locate every atom in a zeolite, an aluminosilicate with many important applications, such as water purification. X ray crystallography is a method of determining the arrangement of atoms within a crystal, in which a beam of X rays strikes a… …
87Kalman filter — Roles of the variables in the Kalman filter. (Larger image here) In statistics, the Kalman filter is a mathematical method named after Rudolf E. Kálmán. Its purpose is to use measurements observed over time, containing noise (random variations)… …
88Polythiophene — The monomer repeat unit of unsubstituted polythiophene …
89South African wine — Some South African wines and cheeses Contents 1 …
90Calculated Carbon Aromaticity Index — The calculated carbon aromaticity index (CCAI) is an index of the ignition quality of residual fuel oil.The running of all internal combustion engines is dependent on the ignition quality of the fuel. For spark ignition engines the fuel has an… …
