maintenance channels
81nuclear reactor — Physics. reactor (def. 4). Also called nuclear pile. [1940 45] * * * Device that can initiate and control a self sustaining series of nuclear fission reactions. Neutrons released in one fission reaction may strike other heavy nuclei, causing them …
82Social Protection — ▪ 2006 Introduction With medical costs skyrocketing and government programs scaled back, citizens bore more responsibility for their health care costs; irregular migration, human trafficking, and migrant smuggling posed challenges for… …
83cardiovascular disease — Introduction any of the diseases, whether congenital or acquired, of the heart and blood vessels (blood vessel). Among the most important are atherosclerosis, rheumatic heart disease, and vascular inflammation. Cardiovascular diseases are a …
84environmental works — ▪ civil engineering Introduction infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations …
85water supplies — In the Stone Age, when people first began settling on the alluvial plains of Mesopotamia, perhaps their single most immediate concern was finding reliable sources of freshwater for drinking and watering their crops and animals. At first, the… …
86Irrigation — For its use in viticulture, see Irrigation in viticulture. For its use in medicine, see Therapeutic irrigation. LEPA redirects here. For the airport serving Palma de Mallorca, Spain, assigned the ICAO code LEPA, see Palma de Mallorca Airport.… …
87Transport in Zambia — Railways in Zambia= Total: 2,164 km (1995)Zambia Rail Network Map [http://www.railtracker.org/RailAFFILIATES/Railways/ZR/zrrailnt.htm Railtracker (ACIS/UNCTAD) Zambia Railway Network Diagram] Principal lines* Zambia Railways Limited (ZRL) 1.067 m …
88MediaWiki — namespace redirects here. For help regarding the MediaWiki namespace on Wikipedia, see Help:MediaWiki namespace. For general information about Wikipedia namespaces, see Wikipedia:Namespace. Talk page and MediaWiki talk page redirect here. For… …
89Dendritic spine — Spiny dendrite of a striatal medium spiny neuron. Common types of dendri …
90Family Radio Service — The Family Radio Service (FRS) is an improved walkie talkie radio system authorized in the United States since 1996. This personal radio service uses channelized frequencies in the ultra high frequency (UHF) band. It does not suffer the… …
