Sphere

A sphere (from Greek σφαῖρα — sphaira, "globe, ball") is a perfectly round geometrical object in three-dimensional space that is the surface of a completely round ball, (viz., analogous to a circular object in two dimensions). Like a circle, which geometrically is a two-dimensional object, a sphere is defined mathematically as the set of points that are all at the same distance r from a given point, but in three-dimensional space. This distance r is the radius of the ball, and the given point is the center of the mathematical ball. The longest straight line through the ball, connecting two points of the sphere, passes through the center and its length is thus twice the radius; it is a diameter of the ball.

While outside mathematics the terms "sphere" and "ball" are sometimes used interchangeably, in mathematics a distinction is made between the sphere (a two-dimensional closed surface embedded in three-dimensional Euclidean space) and the ball (a three-dimensional shape that includes the sphere as well as everything inside the sphere). The ball and the sphere share the same radius, diameter, and center.

Sphere (Japanese band)

Sphere is a J-pop idol unit made up of voice actresses who are all managed by Sony Music Entertainment's Music Ray'n subdivision, under the Lantis music label GloryHeaven. The group debuted in April 2009 releasing their first single "Future Stream", which was followed up with the June 2009 release of "Dangerous Girls" theme used in the opening animation of the PlayStation Portable game "Ken to Mahou Gakuen Mono 2" (known in the US as "Class of Heroes 2"). As all four are voice actresses, their music is frequently featured as theme songs to a variety of anime series, including First Love Limited, Sora no Manimani, Demon King Daimao, Asobi ni iku yo! and Ryūgajō Nanana no Maizōkin. The group features in the anime Natsuiro Kiseki, in which every member has a role as the four main characters.

Members

Discography

Source:

Albums

Sphere (band)

Sphere is the name of the following musical groups:

Landing

Landing is the last part of a flight, where a flying animal, aircraft, or spacecraft returns to the ground. When the flying object returns to water, the process is called alighting, although it is commonly called "landing," "touchdown" or "splashdown" as well. A normal aircraft flight would include several parts of flight including taxi, takeoff, climb, cruise, descent and landing.

Aircraft

Aircraft usually land at an airport on a firm runway or helicopter landing pad, generally constructed of asphalt concrete, concrete, gravel or grass. Aircraft equipped with pontoons (floatplane) or with a boat hull-shaped fuselage (a flying boat) are able to land on water. Aircraft also sometimes use skis to land on snow or ice.

To land, the airspeed and the rate of descent are reduced such that the object descends at a low enough rate to allow for a gentle touch down. Landing is accomplished by slowing down and descending to the runway. This speed reduction is accomplished by reducing thrust and/or inducing a greater amount of drag using flaps, landing gear or speed brakes. When a fixed-wing aircraft approaches the ground, the pilot will move the control column back to execute a flare or round-out. This increases the angle of attack. Progressive movement of the control column back will allow the aircraft to settle onto the runway at minimum speed, landing on its main wheels first in the case of a tricycle gear aircraft or on all three wheels simultaneously in the case of a conventional landing gear-equipped aircraft, commonly referred to as a "taildragger". This is known as flaring.

Landing (band)

Landing is an American indie rock outfit from Connecticut, United States. Terms used to describe the music created by Aaron Snow and Adrienne Snow include ambient, shoegaze, slowcore, and space rock. Past members have included Dick Baldwin (guitar, bass) and Peter Baumann (not the same musician who was once a member of Tangerine Dream). The most current line up features Daron Gardner (bass) and John Miller (drums, guitar).

Originally named May Landing as a duo, the group changed the name to Landing in 1998 with the additions of Dick Baldwin (guitar, bass), Daron Gardner (bass, drums).

Landing returned June 2012 with the release of their eighth LP and first LP on Geographic North, entitled Landing. The nine songs were written and recorded over the six-year hiatus following Gravitational IV. "Heart Finds the Beat" was the first single released off the album.

Discography

Studio albums

Landing operation

A landing operation is a military action aimed at a bringing the landing force usually via landing craft to a shore or to land with the purpose of power projection ashore by forces coming usually from ships and also aircraft and able to fight.

Landing may refer to bringing of either the seafaring (naval landing forces; see amphibious warfare) or airborne forces (air landing troops).

Landing of ships

In a military invasion conducted by sea, the landing and establishment of a beachhead is a critical phase. In the Iliad, the landing operation of the Achaean navy is described in book three. Since the Trojans had been warned of the invasion, the beach was defended. In Greek polytheism, the ἱερά ἐπιβατήρια were sacrifices offered to the gods after a successful landing. A λόγος ἐπιβατήριον was a dignified speech delivered upon disembarkation, contrasting with an ἀποβατήριον, the speech delivered upon departure.

Air landing troops