0J (other)
0J (zero J) or 0-J may refer to: *0J, an abbreviation for January 0 *0J, an abbreviation for 0 junction power bonds in a Bond graph *0J, an abbreviation for zero jump, a type of Turing jump See also * OJ (other) *J0 (other) J0 may refer to: * j_0, Zeroth order Bessel function of the first kind * Yo (greeting), Yo, often written as j0 in Leet * J00 (other) See also * JO (other) * 0J (other) {{Letter-NumberCombDisambig ...

January 0
Several non-standard dates are used in calendars for various purposes: some are expressly fictional, some are intended to produce a rhetorical effect (such as sarcasm), and others attempt to address a particular mathematical, scientific or accounting requirement or discrepancy within the calendar system. Historical January 0 January 0 is an alternative name for December 31. January 0 is the day before January 1 in an annual ephemeris. It keeps the date in the year for which the ephemeris was published, thus avoiding any reference to the previous year, even though it is the same day as December 31 of the previous year. January 0 also occurs in the epoch for the ephemeris second, "1900 January 0 at 12 hours ephemeris time". 1900 January 0 (at Greenwich Mean Noon) was also the epoch used by Newcomb's ''Tables of the Sun'', which became the epoch for the Dublin Julian day. February 30 February 30 is a day that does not occur on the Gregorian calendar, where the month of Februa ...
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Bond Graph
A bond graph is a graphical representation of a physical dynamic system. It allows the conversion of the system into a state-space representation. It is similar to a block diagram or signal-flow graph, with the major difference that the arcs in bond graphs represent bi-directional exchange of physical energy, while those in block diagrams and signal-flow graphs represent uni-directional flow of information. Bond graphs are multi-energy domain (e.g. mechanical, electrical, hydraulic, etc.) and domain neutral. This means a bond graph can incorporate multiple domains seamlessly. The bond graph is composed of the "bonds" which link together "single-port", "double-port" and "multi-port" elements (see below for details). Each bond represents the instantaneous flow of energy () or power. The flow in each bond is denoted by a pair of variables called power variables, akin to conjugate variables, whose product is the instantaneous power of the bond. The power variables are broken in ...
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Turing Jump
In computability theory, the Turing jump or Turing jump operator, named for Alan Turing, is an operation that assigns to each decision problem a successively harder decision problem with the property that is not decidable by an oracle machine with an oracle for . The operator is called a ''jump operator'' because it increases the Turing degree of the problem . That is, the problem is not Turing-reducible to . Post's theorem establishes a relationship between the Turing jump operator and the arithmetical hierarchy of sets of natural numbers.. Informally, given a problem, the Turing jump returns the set of Turing machines that halt when given access to an oracle that solves that problem. Definition The Turing jump of can be thought of as an oracle to the halting problem for oracle machines with an oracle for . Formally, given a set and a Gödel numbering of the -computable functions, the Turing jump of is defined as X'= \. The th Turing jump is defined inductive ...
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OJ (other)
OJ may refer to: * Orange juice People In American football * O. J. Simpson (1947–2024), American football player, broadcaster, actor, and convicted felon * Ottis Jerome "O.J." Anderson (born 1957), American football player * O. J. Childress (born 1976), American football player * OJ Frederique Jr., American football player * O. J. Howard (born 1994), American football player * O. J. McDuffie (born 1969), American football player In other sports * O. J. Mayo (born 1987), American professional basketball player * Olivier Jacque (born 1973), French motorcycle road racer * Olli Jokinen (born 1978), Finnish ice hockey player * Orlando Jordan (born 1974), American professional wrestler * Omar 'OJ' Koroma (born 1989), Gambian footballer * OJ Porteria (born 1994), Filipino footballer * In music * OJ da Juiceman (born 1981), American rapper * Oran "Juice" Jones (born 1959), American soul and R&B singer and actor * Orlando Julius (born 1943), Nigerian musician sometime ...
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