Epoch

Ask a question about 'Epoch' Start a new discussion about 'Epoch' Answer questions from other users Full Discussion Forum

Periodization

• Epoch (reference date)
  Epoch (reference date)
  
  In the fields of chronology and periodization, an epoch means an instant in time chosen as the origin of a particular era. The "epoch" then serves as a reference point from which time is measured....
   - A defining moment in the beginning of, or characteristic of, a distinctive historical period or era
  Era
  
  An era is a commonly used word for long period of time. When used in science, for example geology, eras denote clearly defined periods of time of arbitrary but well defined length, such as for example the Mesozoic era from 252 Ma?66 Ma, delimited by a start event and an end event....
  .
• On the geologic time scale
  Geologic time scale
  
  File:Geologic clock.jpgThe geologic time scale is a chronology schema relating stratigraphy to time that is used by geologys and other earth sciences scientists to describe the timing and relationships between events that have occurred during the history of the Earth....
  , a span of time smaller than a "period" and larger than an "age".
• A phase in the development of the universe
  Timeline of the Big Bang
  
  This timeline of the Big Bang describes the events according to the widely accepted scientific theory of the Big Bang, using the cosmological time parameter of comoving coordinates....
   with distinctive properties during the the Big Bang.
• Epoch (astronomy)
  Epoch (astronomy)
  
  In astronomy, an epoch is a moment in time used as a reference for the orbital elements of a celestial body. Typically, the epoch is either the moment an observation was made or the moment for which a prediction was calculated....
   - a precise moment in time for which celestial coordinates or orbital elements are specified by international agreement, usually periodically reset to centennial and half-century dates. All other orbits
  Celestial mechanics
  
  Celestial mechanics is the branch of astronomy that deals with the motion s of celestial objects. The field applies principles of physics, historically classical mechanics, to astronomical objects such as stars and planets to produce ephemeris data....
   calculations near or after the astronomical epoch are based on the epoch date.
• Many computer operating systems maintain system time based on some starting time called the epoch. For example, Unix
  Unix
  
  Unix is a computer operating system originally developed in 1969 by a group of American Telephone & Telegraph employees at Bell Labs, including Ken Thompson , Dennis Ritchie, Douglas McIlroy, and Joe Ossanna....
   and POSIX
  POSIX
  
  POSIX or "Portable Operating System Interface" is the collective name of a family of related standardizations specified by the Institute of Electrical and Electronics Engineers to define the application programming interface , along with shell and utilities interfaces for software compatible with variants of the Unix operating system, altho...
   systems count time as seconds since January 1 1970. See Unix time
  Unix time
  
  Unix time, or POSIX time, is a system for describing points in time, defined as the number of seconds elapsed since midnight Coordinated Universal Time of January 1 1970, not counting leap seconds....
  .

Proper noun

• Epoch (magazine)
  Epoch (magazine)
  
  Epoch is a three-times-a-year American literary magazine founded in 1947 in literature and published by Cornell University. The widely respected magazine has published well-known authors and award-winning work including stories reprinted in The Best American Short Stories series and poems later included in The Best American Poetry se...
  , the literary magazine of Cornell University.
• Cross Epoch (manga), cross between two mangas by Oda Eiichiro and Toriyama Akira.
• Ha-Tsefirah
  Ha-Tsefirah
  
  Ha-Tsefirah was a Hebrew language newspaper published in 1862 and 1874-1931. The first issue of Ha-Tsefirah appeared in Warsaw, Congress Poland, Russian Empire in 1862, edited by Chaim Selig Slonimski ....
   (lit. Epoch), a Hebrew language newspaper published in 1862 and 1874-1931.
• Epoch (film)
  Epoch (film)
  
  Epoch is a 2001 in film science fiction film directed by Matt Codd, starring David Keith, Stephanie Niznik, and Brian Thompson . In it, a strange monolith is discovered, and the team sent to study it encounters repeated disasters....
  , a science fiction film directed by Matt Codd
• Epoch Game Pocket Computer
  Epoch Game Pocket Computer
  
  The Epoch Game Pocket Computer is a handheld game console released by Epoch in Japan in 1984. It was one of the very few truly handheld systems to be released in the early 1980s, preceding the Game Boy by 5 years....
  , an early hand-held game console
• Epoch Co.
  Epoch Co.
  
  Epoch Co., Ltd. is a Japanese toy and computer games company founded in 1958 which is best known for manufacturing Barcode Battler and Doraemon video games....
  , the maker of the above and other computer games
• Epoch (Chrono Trigger), a flying time machine in role-playing game Chrono Trigger
• Epoch (DC Comics)
  Epoch (DC Comics)
  
  Epoch, also known as The Lord of Time, is a comic book fictional character published by DC Comics. He first appeared in Justice League of America #10 and was created by writer Gardner Fox and artist Mike Sekowsky....
  , a supervillain also known as the Lord of Time
• Epoch (Marvel Comics)
  Epoch (Marvel Comics)
  
  Epoch is a fictional Cosmic entities in the Marvel Comics Marvel Universe. It is the "daughter" of Eon and "granddaughter" of Eternity ....
  , a cosmic entity in the Marvel Comics universe.
• Epoch Hunter, a boss in World of Warcraft
  World of Warcraft
  
  World of Warcraft, often referred to as WoW, is a massively multiplayer online role-playing game . It is Blizzard Entertainment's fourth released game set in the fantasy Warcraft universe, which was first introduced by Warcraft: Orcs & Humans in 1994 in video gaming....
  's Caverns of Time; Old Hillsbrad Foothills.
• The Epoch Times
  The Epoch Times
  
  The Epoch Times is a privately owned, general-interest newspaper, originally published in Chinese language. According to their own statement, the Epoch Times exists to provide what they see as uncensored coverage of events in China....
  , a privately owned Falun Gong-linked newspaper
• Epoch Javascript Calendar
  Epoch Javascript Calendar
  
  Epoch Javascript Calendar is an open source , GNU Lesser General Public License calendar component for use in web pages. It is written in JavaScript and compatible with almost all modern browsers....
   is an open source, GPL calendar component for use in web pages written in JavaScript.
• Epoch operating system was a European research project in the 1990s to build an operating system based on the ChorusOS
  ChorusOS
  
  ChorusOS is a microkernel real-time operating system designed for embedded systems. Sun Microsystems acquired Chorus Syst?mes, the company which created ChorusOS, in 1997....
   operating system kernel.
• EPOCH - A chemotherapy
  Chemotherapy
  
  Chemotherapy, in its most general sense, refers to treatment of disease by chemicals that kill cells, specifically those of micro-organisms or cancer....
   regimen for non-Hodgkin lymphoma
  Non-Hodgkin lymphoma
  
  The non-Hodgkin lymphomas are a diverse group of hematological malignancy which encompass any lymphoma other than Hodgkin lymphoma.Lymphoma is a type of cancer derived from lymphocytes, a type of white blood cell....
   comprising Etoposide
  Etoposide
  
  Etoposide phosphate is an inhibitor of the enzyme topoisomerase II. It is used as a form of chemotherapy for malignancies such as Ewing's sarcoma, lung cancer, testicular cancer, lymphoma, non-lymphocytic leukemia, and glioblastoma multiforme....
  , Prednisone
  Prednisone
  
  Prednisone is a synthetic corticosteroid drug that is usually taken orally but can be delivered by intramuscular injection and can be used for a number of different conditions....
  , Oncovin (vincristine
  Vincristine
  
  Vincristine , also known as leurocristine, is a vinca alkaloid from the Catharanthus roseus , formerly Vinca rosea and hence its name....
  ), Cyclophosphamide
  Cyclophosphamide
  
  Cyclophosphamide , also known as cytophosphane, is a nitrogen mustard alkylating antineoplastic agent, from the oxazophorines group. It is used to treat various types of cancer and some autoimmune disorders....
  , Hydroxydaunorubicin (Adriamycin)
• Epoch (larp), a game played in Ontario, Canada. Started in 1990's in a fictional medieval land.

Other

• A step in the training process of an artificial neural network
  Artificial neural network
  
  An artificial neural network , often just called a "neural network" , is a mathematical model or computational model based on biological neural networks....