Saturday, February 28, 2015
Friday, February 27, 2015
Thursday, February 26, 2015
Wednesday, February 25, 2015
Tuesday, February 24, 2015
Monday, February 23, 2015
Anno Mundi (Latin: "in the year of the world"), abbreviated as AM or A.M., refers to a Calendar era based on the Biblical creation of the world. Numerous efforts have been made to determine the Biblical date of Creation, yielding varying results. Besides differences in interpretation, which version of the Bible is being referenced also impacts on the result. (see Dating creation)
The Hebrew calendar era is used within the Jewish communities for religious and other purposes; and the Byzantine calendar has been in general use at one time in the Orthodox Churches and several Eastern European countries.
Sunday, February 22, 2015
A crannog is typically a partially or entirely artificial island, usually built in lakes, rivers and estuarine waters of Scotland and Ireland. Crannogs were used as dwellings over five millennia from the European Neolithic Period, to as late as the 17th/early 18th century although in Scotland, convincing evidence for Early and Middle Bronze Age or Norse Period use is not currently present in the archaeological record.
The earliest radiocarbon determinations obtained from key sites such as Oakbank in Loch Tay or Redcastle, Beauly Firth approach the Late Bronze Age - Early Iron Age transition at their widest interpretation at 2 sigma or 95.4% probability, falling after c.800BC and therefore could only be considered Late Bronze Age by the narrowest of margins. Crannogs have been variously interpreted as free-standing wooden structures, as at Loch Tay, although more commonly they exist as brush, stone or timber mounds which can be revetted with timber piles. However, in areas such as the Western Isles of Scotland, timber was unavailable from the Neolithic onwards. As a result, completely stone crannogs supporting drystone architecture are common here. Today, crannogs typically appear as small, circular islets, often 10 to 30 metres (30 to 100 ft) in diameter, covered in dense vegetation due to their inaccessibility to grazing livestock.
Saturday, February 21, 2015
In political jargon, useful idiot is a pejorative term used to describe people perceived as propagandists for a cause whose goals they do not understand, who are used cynically by the leaders of the cause.
The term was originally used to describe Soviet sympathizers in Western countries. The implication was that although the people in question naïvely thought of themselves as an ally of the Soviet Union, they were actually held in contempt and were being cynically used. The use of the term in political discourse has since been extended to other propagandists, especially those who are seen to unwittingly support a malignant cause which they naively believe to be a force for good.
Despite often being attributed to Lenin, in 1987, Grant Harris, senior reference librarian at the Library of Congress, declared that "We have not been able to identify this phrase among [Lenin's] published works."BBC radio documentary titled Useful Idiots listed among "useful idiots" of Joseph Stalin several prominent British writers including H. G. Wells and Doris Lessing, the Irish writer George Bernard Shaw, the American journalist Walter Duranty and the singer Paul Robeson.
Friday, February 20, 2015
Symptoms are initially mild, and then develop into severe coughing fits, which produce the namesake high-pitched "whoop" sound in infected babies and children when they inhale air after coughing. The coughing stage lasts approximately six weeks before subsiding.Prevention via vaccination is of primary importance because treatment is of little benefit to the person infected. However, antibiotics shorten the duration of infectiousness and are thus recommended. It is estimated that the disease currently affects 48.5 million people yearly, resulting in nearly 295,000 deaths.
Thursday, February 19, 2015
Metrology is the science of measurement. Metrology includes all theoretical and practical aspects of measurement. The word comes from Greek μέτρον (metron), "measure" + "λόγος" (logos), amongst others meaning "speech, oration, discourse, quote, study, calculation, reason". In Ancient Greek the term μετρολογία (metrologia) meant "theory of ratios".
Wednesday, February 18, 2015
Tuesday, February 17, 2015
A dud is an ammunition round or explosive that fails to fire or detonate, respectively, on time or on command. Poorly designed devices (for example, improvised explosive devices (IEDs)), and small devices, have higher chances of being duds.
Duds are still dangerous, and can explode if handled. They have to be deactivated and disposed of carefully. In wartorn areas, many curious children have been injured or killed from tampering with such devices. Dud fireworks should never be destroyed by soaking in water as most fireworks becomes most unstable after water ingress. When the fireworks dryes it can "sweat" chemicals that are wery unstable.
Monday, February 16, 2015
Sunday, February 15, 2015
Saturday, February 14, 2015
Friday, February 13, 2015
A pow-wow (also powwow or pow wow ) is a gathering of North America's Native people. The word derives from the Narragansett word powwaw, meaning "spiritual leader". A modern pow-wow is a specific type of event where both Native American and non-Native American people meet to dance, sing, socialize, and honor American Indian culture. There is generally a dancing competition, often with significant prize money awarded. Pow-wows vary in length from one day session of 5 to 6 hours to three days. Major pow-wows or pow-wows called for a special occasion can be up to one week long.
The term also has been used to describe any gathering of Native Americans of any tribe, and as such is occasionally heard in older Western movies. The word has also been used to refer to a meeting, especially a meeting of powerful people such as officers in the military. However, such use can also be viewed as disrespectful to Native culture.
Thursday, February 12, 2015
Hydrofoils can be artificial, such as the rudder or keel on a boat, the diving planes on a submarine, a surfboard fin, or occur naturally, as with fish fins, the flippers of aquatic mammals, the wings of swimming seabirds, or other creatures like the sand dollar.
The term "hydrofoil" is commonly used for the wing-like structure mounted on struts below the hull of a variety of boats (see illustration), which lifts the boat out of the water during forward motion, in order to reduce hull drag. As a synecdoche, the term "hydrofoil" is often used to refer to boats using hydrofoil technology. Most of this article is about this type of hydrofoil.