Past

The past is a term used to indicate the totality of events which occurred before a given point in time. The past is contrasted with and defined by the present and the future. The concept of the past is derived from the linear fashion in which human observers experience time, and is accessed through memory and recollection. In addition, human beings have recorded the past since the advent of written language.

The past is the object of such fields as history, memory, flashback, archaeology, archaeoastronomy, chronology, geology, historical geology, historical linguistics, law, ontology, paleontology, paleobotany, paleoethnobotany, palaeogeography, paleoclimatology, and cosmology.

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The Past

The past denotes period of time that has already happened, in contrast to the present and the future.

The Past may also refer to:

See also:

Jed Madela

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John Edward Tajanlangit (born July 14, 1977), better known by his stage name, Jed Madela, is a Filipino recording artist and TV host. He became the first Filipino to win the WCOPA world grand champion title, and is known with a uniquely wide vocal range.

He is a co-host and performer of ASAP. He is a member of ABS-CBN's Star Magic.

He is currently managed by GM Proponents of Artists Inc.

Life and career

Early life and career beginnings

Madela was born in Iloilo, Philippines, the son of JC Roy Tajanlangit, a church choirmaster, and Agnes Tajanlangit, an Administrative Assistant at Pepsi. He is the elder brother of Eric Tajanlangit and Joanne Christine Tajanlangit.

He was only five years old when he started singing and acknowledges his father as his first voice coach. He is the eldest among three siblings, and his younger brother and sister are also singers in their church choir.

Jed earned a Business Administration degree from the University of San Agustin in Iloilo City at the age of 18. During his campus years, he was also a regular fixture in various singing competitions, which he usually ended up winning.

Past (Aitken)

Past is a 1935 outdoor sculpture by Robert Ingersoll Aitken, located in front of the National Archives Building in Washington, D.C., in the United States. John Russell Pope served as the sculpture's architect and Edward H. Ratti served as its carver. The sculpture is made of Indiana limestone and measures approximately 20 x 8 x 12 feet, with a base approximately 12 x 12 x 15 feet.Past is a companion piece to Present, also located in front of the National Archives Building.

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References

External links

Media related to Past (sculpture) at Wikimedia Commons

Coordinates: 38°53′36″N 77°01′24″W / 38.89323°N 77.02320°W / 38.89323; -77.02320

PAST

PAST or Past may refer to:

See also

Primeval Structure Telescope

The Primeval Structure Telescope (PaST), also called 21 Centimetre Array (21CMA), is a Chinese radio telescope array designed to detect the earliest luminous objects in the universe, including the first stars, supernova explosions, and black holes. All of these objects were strong sources of ultraviolet radiation, so they ionised the material surrounding them. The structure of this reionisation reflects the overall density structure at the redshift of luminous-object formation.

PaST will consist an array of some ten-thousand log-periodic antennas spread over several square kilometers. It will capture a detailed radio image of the sky in the range of 1420 megahertz. The telescope is built on the high plateau of Ulastai in the west of Xinjiang province, a remote area away from most television and radios signals that may interfere the weak 21 cm background signals.

The hydrogen line, 21 centimeter line or HI line refers to the electromagnetic radiation spectral line that is created by a change in the energy state of neutral hydrogen atoms. This electromagnetic radiation is at the precise frequency of 1420.40575177 MHz, which is equivalent to the vacuum wavelength of 21.10611405413 cm in free space. This wavelength or frequency falls within the microwave radio region of the electromagnetic spectrum, and it is observed frequently in radio astronomy, since those radio waves can penetrate the large clouds of interstellar cosmic dust that are opaque to visible light.

Clockwork

Clockwork refers to the inner workings of either a mechanical clock (where it is also called a movement) or another device that operates in a similar fashion (such as a dial indicator). Specifically, the term refers to mechanisms utilizing a complex series of gears.

A clockwork motor is a clockwork device mechanically powered by a mainspring, a spiral torsion spring of metal ribbon. Energy is stored in the mainspring manually by winding it up, turning a key attached to a ratchet which twists the mainspring tighter. Then the force of the mainspring turns the clockwork's gears, until the stored energy is used up. The adjective wind-up refers to mainspring-powered clockwork devices, which include clocks and watches, kitchen timers, music boxes, and wind-up toys.

History

One of the earliest known examples of a clockwork mechanism is the Antikythera mechanism, a first-century BC geared analogue computer, somewhat astrolabe-like, for calculating astronomical positions and eclipses, recovered from a Greek shipwreck. There are many other accounts of clockwork devices in ancient Greece, even in its mythology, and the mechanism itself is sophisticated enough to indicate a significant history of lesser devices leading up to its creation.