ballast screening

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• Ballast tamper — A ballast tamper or tamping machine is a machine used to pack (or tamp) the track ballast under railway tracks to make the tracks more durable. Prior to the introduction of mechanical tampers, this task was done by manual labour with the help of… …   Wikipedia

• Capsize screening formula — The capsize screening formula (CSF) is a somewhat controversial figure. It is defined for sailboats as:CSF = Beam / (Displacement/64.2)1/3It came into being after the 1979 Fastnet race in England where a storm shredded the race fleet. The… …   Wikipedia

• Regulation of ship pollution in the United States — International laws and regulationsMARPOL 73/78 is one of the most important treaties regulating pollution from ships. Six Annexes of the Convention cover the various sources of pollution from ships and provide an overarching framework for… …   Wikipedia

• environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …   Universalium

• Cruise ship pollution in the United States — The cruise ship industry is a significant and growing contributor to the United States economy, providing more than $32 billion in benefits annually and generating more than 330,000 U.S. jobs, but also making the environmental impacts of its… …   Wikipedia

• Martha's Vineyard Film Festival — The Martha’s Vineyard Film Festival (MVFF) is an annual film festival founded in 2001 and held in Chilmark, Massachusetts, on the island of Martha’s Vineyard. The festival takes place in March, but the MVFF also produces a summer film series in… …   Wikipedia

• 2008 Sundance Film Festival — Infobox Film Festival name = 2008 Sundance Film Festival caption = opening = In Bruges closing = CSNY Déjà Vu awardsreceived = awardsgiven = films = directors = producers = writers = starring = host = Sundance Institute date = January 17 27, 2008 …   Wikipedia

• Pentagrid converter — For other types of frequency converters please, see Frequency converter. The pentagrid converter is a radio receiving valve (vacuum tube) with five grids used as the frequency mixer stage of a superheterodyne radio receiver. Grids of a 12SA7GT… …   Wikipedia

• Operation Dumbo Drop — Theatrical release poster Directed by Simon Wincer Produced by …   Wikipedia

• Erwin Rommel — Infobox Military Person name= Erwin Johannes Eugen Rommel born=birth date|1891|11|15|df=y died=dda|1944|10|14|1891|11|15|df=y placeofbirth=Heidenheim, Kingdom of Württemberg German Empire placeofdeath=Herrlingen, Germany caption=Field Marshal… …   Wikipedia

• Medieval warfare — Battle of Crécy (1346) between the English and French in the Hundred Years War. Warfare …   Wikipedia