Radar

Radar is an object-detection system that uses radio waves to determine the range, angle, or velocity of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. A radar transmits radio waves or microwaves that reflect from any object in their path. A receive radar, which is typically the same system as the transmit radar, receives and processes these reflected waves to determine properties of the object(s).

Radar was secretly developed by several nations in the period before and during World War II. The term RADAR was coined in 1940 by the United States Navy as an acronym for RAdio Detection And Ranging. The term radar has since entered English and other languages as a common noun, losing all capitalization.

The modern uses of radar are highly diverse, including air and terrestrial traffic control, radar astronomy, air-defense systems, antimissile systems; marine radars to locate landmarks and other ships; aircraft anticollision systems; ocean surveillance systems, outer space surveillance and rendezvous systems; meteorological precipitation monitoring; altimetry and flight control systems; guided missile target locating systems; ground-penetrating radar for geological observations; and range-controlled radar for public health surveillance. High tech radar systems are associated with digital signal processing, machine learning and are capable of extracting useful information from very high noise levels.

Arabs

Arabs (/ˈærəbz/; Arabic: عرب‎, ‘arab) are a major panethnic group whose native language is Arabic, comprising the majority of the Arab world. They primarily inhabit Western Asia, North Africa, and parts of the Horn of Africa. Before the spread of Islam, Arab referred to any of the largely nomadic Semitic tribes inhabiting the northern and central Arabian Peninsula. In modern usage Arab refers to a heterogeneous collection of Arabic-speaking peoples in the Middle East and North Africa. The ties that bind Arabs are linguistic, cultural, and political, and to a lesser extent genetic, with Arabized Arabs displaying genetic admixture from the Arabian peninsula as well as indigenous elements. As such, Arab identity is based on one or more of genealogical, linguistic or cultural grounds, although with competing identities often taking a more prominent role, based on considerations including regional, national, clan, kin, sect, and tribe affiliations and relationships. Not all people who could be considered Arab identify as such. If the Arab panethnicity is regarded as a single population, then it constitutes the world's second largest group of people after the Han Chinese.

Saudi Arabia

Saudi Arabia (ⁱ/ˌsɔːdiː əˈreɪbiə/, ⁱ/ˌsaʊ-/), officially known as the Kingdom of Saudi Arabia (KSA), is an Arab state in Western Asia constituting the bulk of the Arabian Peninsula. With a land area of approximately 2,150,000 km² (830,000 sq mi), Saudi Arabia is geographically the second-largest state in the Arab world after Algeria. Saudi Arabia is bordered by Jordan and Iraq to the north, Kuwait to the northeast, Qatar, Bahrain, and the United Arab Emirates to the east, Oman to the southeast, and Yemen to the south. It is the only nation with both a Red Sea coast and a Persian Gulf coast, and most of its terrain consists of arid inhospitable desert or barren landforms.

The area of modern-day Saudi Arabia formerly consisted of four distinct regions: Hejaz, Najd, and parts of Eastern Arabia (Al-Ahsa) and Southern Arabia ('Asir). The Kingdom of Saudi Arabia was founded in 1932 by Ibn Saud. He united the four regions into a single state through a series of conquests beginning in 1902 with the capture of Riyadh, the ancestral home of his family, the House of Saud. The country has since been an absolute monarchy, effectively a hereditary dictatorship governed along Islamic lines. The ultra-conservative Wahhabism religious movement within Sunni Islam has been called "the predominant feature of Saudi culture", with its global spreading largely financed by the oil and gas trade. Saudi Arabia is sometimes called "the Land of the Two Holy Mosques" in reference to Al-Masjid al-Haram (in Mecca), and Al-Masjid an-Nabawi (in Medina), the two holiest places in Islam. The Kingdom has a total population of 28.7 million, of which 20 million are Saudi nationals and 8 million are foreigners.

Blue Pearl

Blue Pearl is a techno and house music duo, consisting of American female singer Durga McBroom and British musician Youth (Martin Glover). They charted two songs on the US Billboard Hot Dance Club Play chart.

"Naked In The Rain" was a #4 hit in the UK Singles Chart and a #5 dance hit in the US in 1990, which was originally issued on blue vinyl. It was followed by "(Can You) Feel the Passion" (whose melody samples Bizarre Inc's "Playing With Knives"), which hit #1 on both Billboard's Dance Club Play and the UK Dance Chart in 1992, reaching #14 on the UK Singles Chart. They also had a minor hit in the UK Singles Chart in November 1990 with the #31 hit, "Little Brother".

Their records featured guest appearances from David Gilmour and Richard Wright of Pink Floyd, for whom McBroom had been a backing vocalist.

Discography

Albums

Singles

See also

References

Cruise missile

A cruise missile is a guided missile used against terrestrial targets, so called because the major portion of its flight path is conducted at cruise speed (i.e., approximately constant velocity). Cruise missiles are designed to deliver a large warhead over long distances with high accuracy (i.e. small circular error probability). The dynamics of cruise are a result of aerodynamic lift (force), and the equality of the thrust or propulsion forces against aerodynamic drag and as a result there is no acceleration. Modern cruise missiles are capable of travelling at supersonic or high subsonic speeds, are self-navigating, and are able to fly on a non-ballistic, extremely low-altitude trajectory. They are distinct from unmanned aerial vehicles (UAV) in several ways: the cruise missile is a single use weapon which is always sacrificed in the mission; it is not intended to provide aerial reconnaissance; and the warhead is integrated directly into the hull of the vehicle and cannot be separated.