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Null
Null may refer to: Science, technology, and mathematics Computing *Null (SQL) (or NULL), a special marker and keyword in SQL indicating that something has no value *Null character, the zero-valued ASCII character, also designated by , often used as a terminator, separator or filler. This symbol has no visual representation *Null pointer or reference (sometimes written NULL, nil, or None), an object pointer (or reference) not currently set to point (or refer) to a valid object Mathematics * Null (mathematics), a zero value in several branches of mathematics Physics * Null (physics), a point in a field where the field quantity is zero * Null (radio), a concept in electromagnetism Arts and media *The Null Corporation, an imprint of the band Nine Inch Nails * ''Null'' (Intronaut EP), 2006 * ''Null'' (Foetus EP), 1995 *Null, an identity of the character Gray Fox in the ''Metal Gear Solid: Portable Ops'' video game *Null, a villain from '' Teenage Mutant Ninja Turtles Adventures'' Pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Null Pointer
In computing, a null pointer or null reference is a value saved for indicating that the pointer or reference does not refer to a valid object. Programs routinely use null pointers to represent conditions such as the end of a list of unknown length or the failure to perform some action; this use of null pointers can be compared to nullable types and to the ''Nothing'' value in an option type. A null pointer should not be confused with an uninitialized pointer: a null pointer is guaranteed to compare unequal to any pointer that points to a valid object. However, depending on the language and implementation, an uninitialized pointer may not have any such guarantee. It might compare equal to other, valid pointers; or it might compare equal to null pointers. It might do both at different times; or the comparison might be undefined behaviour. C In C, two null pointers of any type are guaranteed to compare equal. The preprocessor macro NULL is defined as an implementation-define ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Null (SQL)
In SQL, null or NULL is a special marker used to indicate that a data value does not exist in the database. Introduced by the creator of the relational database model, E. F. Codd, SQL null serves to fulfil the requirement that all ''true relational database management systems (RDBMS)'' support a representation of "missing information and inapplicable information". Codd also introduced the use of the lowercase Greek omega (ω) symbol to represent null in database theory. In SQL, NULL is a reserved word used to identify this marker. A null should not be confused with a value of 0. A null value indicates a lack of a value, which is not the same thing as a value of zero. For example, consider the question "How many books does Adam own?" The answer may be "zero" (we ''know'' that he owns ''none'') or "null" (we ''do not know'' how many he owns). In a database table, the column reporting this answer would start out with no value (marked by Null), and it would not be updated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Null Character
The null character (also null terminator) is a control character with the value zero. It is present in many character sets, including those defined by the Baudot and ITA2 codes, ISO/IEC 646 (or ASCII), the C0 control code, the Universal Coded Character Set (or Unicode), and EBCDIC. It is available in nearly all mainstream programming languages. It is often abbreviated as NUL (or NULL, though in some contexts that term is used for the null pointer). In 8-bit codes, it is known as a null byte. The original meaning of this character was like NOP—when sent to a printer or a terminal, it has no effect (some terminals, however, incorrectly display it as space). When electromechanical teleprinters were used as computer output devices, one or more null characters were sent at the end of each printed line to allow time for the mechanism to return to the first printing position on the next line. On punched tape, the character is represented with no holes at all, so a new u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Null (mathematics)
In mathematics, the word null (from german: null meaning "zero", which is from la, nullus meaning "none") is often associated with the concept of zero or the concept of nothing. It is used in varying context from "having zero members in a set" (e.g., null set) to "having a value of zero" (e.g., null vector). In a vector space, the null vector is the neutral element of vector addition; depending on the context, a null vector may also be a vector mapped to some ''null'' by a function under consideration (such as a quadratic form coming with the vector space, see null vector, a linear mapping given as matrix product or dot product, a seminorm in a Minkowski space, etc.). In set theory, the empty set, that is, the set with zero elements, denoted "" or "∅", may also be called null set. In measure theory, a null set is a (possibly nonempty) set with zero measure. A null space of a mapping is the part of the domain that is mapped into the null element of the image (the inverse ima ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Null (physics)
In physics a null is a point in a field where the field quantity is zero as the result of two or more opposing quantities completely cancelling each other. The field may be scalar, vector or tensor in nature. Common situations where nulls arise are in the polar patterns of microphones and antennae, and nulls caused by reflections of waves. Microphones A common polar pattern for microphones is the cardioid. This has a single direction in which the microphone does not respond to impinging sound waves. Highly directional (shotgun) microphones have more complex polar patterns. These microphones have a large, narrow lobe in the main direction of sound reception but also a smaller lobe in the opposite direction and usually also several other smaller lobes. This pattern is achieved by wave cancellation inside the body of the microphone. Between each of these lobes is a null direction where no sound at all is detected. Antennae {{main, null (radio) A common, and basic, radio ant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gary Null
Gary Michael Null (born January 6, 1945) is an American talk radio host and author who advocates pseudoscientific alternative medicine and produces a line of questionable dietary supplements. Null is hostile to evidence-based medicine and has accused the medical community of being in a cabal with the pharmaceutical industry to suppress novel treatments for economic gains. He has promoted a range of pseudo-scientific and ineffective alternative treatments, including ones for cancer. He is a HIV/AIDS denialist who believes nutritional deficiencies are the causative agents of ''all'' illnesses, and has accordingly promoted fringe, diet-based treatment regimes for curing AIDS and other illnesses. Null holds strong anti-vaccination views and rejects the scientific consensus on topics such as water fluoridation, genetically modified organisms, and electromagnetic fields. Reactions in the scholarly community to Null's claims have been generally negative, and Null along with his ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Null (radio)
In radio electronics, a null is a direction in an antenna's radiation pattern where the antenna radiates almost no radio waves, so the far field signal strength is a local minimum. Nulls occur because different parts of an antenna radiate radio waves of different phase. In directions at which the antenna radiates equal amplitude radio waves of opposite phase, the radio waves cancel, resulting in little or no radio power being radiated in that direction. In other directions the radio waves from different parts of the antenna are in phase and reinforce, resulting in a maximum signal strength in the radiation pattern, called a lobe. In transmitting antennas designed to provide broad coverage nulls can be a problem, preventing reception in a given area. Null fill in the vertical plane is used to prevent this. Nulling antenna Nulls can also be used to advantage. In a radio receiver the receiver's antenna can be adjusted so the direction of the interference source is located in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luke Null
Lucas Elliot Null (born July 7, 1990) is an American actor, comedian, singer, and musician. Null is best known for his brief tenure as a cast member on the NBC sketch comedy series ''Saturday Night Live ''Saturday Night Live'' (often abbreviated to ''SNL'') is an American late-night live television sketch comedy and variety show created by Lorne Michaels and developed by Dick Ebersol that airs on NBC and Peacock. Michaels currently serve ...'' during its 43rd season between 2017 and 2018. After leaving ''SNL'', he began work on an album to be distributed through the comedy label 800 Pound Gorilla. The album is titled ''Guitar Comic'' and was released on June 26, 2019. References External links * American male comedians American male television actors American sketch comedians 21st-century American male actors Comedians from Ohio Living people Male actors from Cincinnati 1990 births 21st-century American comedians {{US-comedian-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christopher Null
Christopher Null is an American writer, film critic, and columnist. A former blogger for Yahoo! Tech, he was the editor of Drinkhacker.com, and the founder and editor-in-chief of Filmcritic.com, which operated from 1995 to 2012. In 2003, CNN called Null an "expert in media, business and technology". In 2013, Null founded Film Racket. He is a founding member of the Online Film Critics Society. Early life Null obtained an MBA at the University of Texas at Austin. Career Null has written for numerous publications, including ''Wired'', '' Business 2.0'', ''PC World'', ''Men's Journal'', ''San Francisco Magazine'', '' Yahoo! Internet Life'', ''Working Woman'', ''PC/Computing'', ''San Jose Magazine'', ''The Austin Chronicle'', and ''The Austin American-Statesman The ''Austin American-Statesman'' is the major daily newspaper for Austin, the capital city of Texas. It is owned by Gannett. The paper prints Associated Press, ''New York Times'', ''The Washington Post'', and ''Los A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Null Symbol (other)
Null symbol may refer to: * Null character, U+0000, U+2400 "symbol for null" (␀), a single-character glyph "NUL" * Null sign (∅), the empty set * Null (SQL) (ω), a special marker and keyword NULL in SQL * Empty string (λ, Λ, or ε), in formal language theory See also * Null (other) Null may refer to: Science, technology, and mathematics Computing *Null (SQL) (or NULL), a special marker and keyword in SQL indicating that something has no value *Null character, the zero-valued ASCII character, also designated by , often used ... * Ø (other) {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keith Null
Keith Aaron Null (born September 24, 1985) is a former American football quarterback. He was drafted by the St. Louis Rams in the 2009 NFL Draft. He played college football at West Texas A&M. Null was also a member of the Jacksonville Jaguars and Carolina Panthers. College career Null started in two seasons for West Texas A&M, throwing for over 9,000 yards in his two seasons as a starter. He was awarded All-Conference honors as a junior and senior. As a junior, Null threw for 4,134 yards with 41 touchdowns and 14 interceptions, including a 498-yard, six-touchdown outburst against Washburn. After settling in as a junior, Null exploded for one of the most prolific passing seasons at any collegiate level as a senior. He finished the season with 5,097 yards and 48 touchdowns with 15 interceptions. Professional career St. Louis Rams Null was drafted by the St. Louis Rams in the 6th round of the 2009 NFL Draft. In week 14, he made his first professional start, filling in for the inj ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Null (Intronaut EP)
''Null'' is the first EP by American post-metal band Intronaut. It was released in 2006 by Goodfellow Records. Track listing # "Intro" − 0:28 # "Sores Will Weep" − 6:06 # "Fragments of Character" − 7:06 # "They (As in Them)" − 6:57 # "Burning These Days" − 7:45 Credits * Leon Del Muerte – guitar, vocals * Sacha Dunable – guitar, vocals * Joe Lester – bass guitar * Danny Walker – drums, sampling * John Haddad – audio engineer, mix engineer A mixing engineer (or simply mix engineer) is responsible for combining ("mixing") different sonic elements of an auditory piece into a complete rendition (also known as "final mix" or "mixdown"), whether in music, film, or any other content of a ... Trench Studios References {{Authority control 2006 debut EPs Intronaut albums ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
