About the linguistic feature wiktionary prefix A prefix is an affix which is placed before the root of a word. Particularly in the study of languages,a prefix is also called a preformative , because it alters the form of the words to which it is affixed. For an example Examples of prefixes unhappy un is a negative or Opposite semantics antonymic prefix. prefix, preview pre is a prefix, with the sense of before redo , review. re is a prefix meaning again . The word prefix is itself made up of the stem fix meaning attach , in this case , and the prefix pre meaning before , both of which are derived from Latin root linguistics root s. See also English prefixes List of Greek and Latin roots in English Suffix Category Linguistic morphology Category Lexical units Category Prefixes Category English morphemes ling stub ar bg br Rakger ca Prefix cv ceb Unanggikit cs P edpona da Pr fiks de Pr fix et Prefiks es Prefijo eo Prefikso gd Ro leasachan gl Prefixo ko hy hr Prefiks io Prefixo id Prefiks os is Forskeyti it Prefisso kk sw Kiambishi awali ku P gir zimannas la Praefixum lt Prie d lis ml nl Prefix taalkunde nds nl Vuurplaksel ja no Prefiks oc Prefixe pnb pl Przedrostek pt Prefixo gramatical ru simple Prefix ss Sicalo sk Predpona fi Prefiksi sv Prefix tl Unlapi th tr n ek uk vec Prefiso gramatica e vo Foy mot wa Betchete linwince yi zh ... more details
A prefix is a part of a word attached to a beginning of a word which modifies the meaning of that stem. Prefix may also refer to Prefix computer science , a prefix of a string Numerical prefix , a prefix derived from the words for numbers in various languages, most commonly Greek and Latin SI prefix or metric prefix, a name or associated symbol that precedes a unit of measure or its symbol to form a decimal multiple or submultiple Binary prefix , a name or associated symbol that can precede a unit of measure in computing to indicate multiplication by a power of two Prefix code , a type of code in coding theory Namespaces Namespace identifier of a Unique identifier Trunk prefix , the initial number to be dialled in a domestic telephone call Telephone prefix , the first set of digits in a telephone number not a country code or area code Network address prefix , the initial part of a network address, used in address delegation and routing ITU prefix , a call sign for radio and television stations. Ship prefix , a combination of letters used in front of the name of a civilian or naval ship Prefix notation or Polish notation , a method of mathematical expression Prefix Magazine , an alternative media publication about music Prefix acoustics , the initial part of the sound, one of J. F. Schouten s five major acoustic parameters disambig de Pr fix Begriffskl rung fr Pr fixe nl Prefix pt Prefixo ru sq Prefiksi sl Predpona th ... more details
Orphan date February 2009 Expert subject Computer networking date November 2008 In IPv6 networking, prefix delegation is used to assign a network address prefix to a user site, configuring the user s router computing router with the prefix to be used for each LAN. This is one of the methods for delegating IPv6 address prefixes to an IPv6 subscriber s network or site . It is described by RFC 3769. With the advent of IPv6 protocol, there is a need for a delegation mechanism which will automate the process of configuring networking equipment with appropriate prefixes at the customer s site. Though IPv6 enables simple and automatic host configuration it does not provide specification to automatically delegate a prefix to routers. DHCPv6 is used for the automatic configuration of IPv6 nodes. In the DHCPv6 protocol DHCPv6 servers send the network configuration parameters to IPv6 node networking node s. Category Computer networks Category IPv6 compu network stub ... more details
orphan date October 2009 Image pwhois query.png thumb This example Prefix WhoIs query shows various information about an IP address including its network origin and registrar details Prefix WhoIs is an open source project that develops and operates a free whois compatible framework for stockpiling and querying various routing and registry information. Prefix WhoIs uses global BGP routing data learned from many ISP backbone routers. Other information sources are also supported, such as imported data from every Regional Internet Registry AFRINIC , APNIC , ARIN , LACNIC and RIPE and geocoding information. The project has been mentioned in a number of popular network security and network engineering books ref Extreme Exploits Advanced Defenses Against Hardcore Hacks 2005 by McGraw Hill ISBN 0 07 225955 8 ref and articles ref http www.securityfocus.com excerpts 17 3 SecurityFocus article ref . Public Prefix WhoIs Service Many public servers around the world operate mirrors of Prefix WhoIs, making the information generally available worldwide. The service may be used with any client using the standard whois protocol. The DNS address whois.pwhois.org resolves to the Prefix WhoIs server nearest to the client based on anycast DNS. Client Software Several client software packages are available from both Prefix WhoIs itself and from commercial vendors. These include free, open source utilities such as WhoB and Layer Four Trace route. Server Software The http pwhois.org server.who pWhoIsd ... Prefix WhoIs native, Cymru, and RPSL . The pWhoIs updatedb agent parses routing information base ... a relational database Software Development Libraries The Prefix WhoIs project distributes C and PHP libraries for direct access to Prefix WhoIs servers. A HTTP simpleQuery interface is also available ... ref Sources references External links http pwhois.org The Prefix WhoIs Project Official Web ... information DEFAULTSORT Prefix Whois Category Network analyzers Category Free network management software ... more details
A prefix code is a type of code system typically a variable length code distinguished by its possession of the prefix property which states that there is no valid code word in the system that is a prefix computer science prefix start of any other valid code word in the set. For example, a code with code words 9, 59, 55 has the prefix property a code consisting of 9, 5, 59, 55 does not, because 5 is a prefix of both 59 and 55 . With a prefix code, a receiver can identify each word without requiring a special marker between words. Prefix codes are also known as prefix free codes , prefix condition codes and instantaneous codes . Although Huffman coding is just one of many algorithms for deriving prefix codes, prefix codes are also widely referred to as Huffman codes , even ... applied as a synonym for prefix free codes ref US Federal Standard 1037C ref ref citation title ...?id oRgtS14oa sC&pg PA202 ref it is used to mean self synchronizing code s, a subclass of prefix codes. Using prefix codes, a message can be transmitted as a sequence of concatenated code words, without ... and removing prefixes that form valid code words. This is not possible with codes that lack the prefix ... word would not know whether that was the complete code word 1 , or merely the prefix of the code ... are prefix codes. Prefix codes are not error correcting codes . In practice, a message might first be compressed with a prefix code, and then encoded again with channel coding including error ... that are possible in a prefix code. Techniques If every word in the code has the same length, the code ... prefix codes. The Huffman coding algorithm takes as input the frequencies that the code words should have, and constructs a prefix code that minimizes the weighted average of the code word lengths ... not appear elsewhere in a code word, the code is prefix free. However, modern communication systems ... uses a 11 to mark the end of every code word. Self synchronizing code s are prefix codes that allow ... more details
In computer science , a prefix grammar is a type of string rewriting system , consisting of a set of string computer science string rewriting rules, and similar to a formal grammar or a semi Thue system . What is specific about prefix grammars is not the shape of their rules, but the way in which they are applied only prefix computer science prefixes are rewritten. The prefix grammars describe exactly all regular language s. ref http portal.acm.org citation.cfm?id 185820 M. Frazier and C. D. Page. Prefix grammars An alternative characterization of the regular languages. Information Processing Letters, 51 2 67 71, 1994. ref Formal definition A prefix grammar G is a n tuple 3 tuple , , S , P , where is a finite alphabet S is a finite set of base strings over P is a set of production rules of the form u v where u and v are strings over For strings x , y , we write x sub G sub y and say G can derive y from x in one step if there are strings u, v, w such that x vu, y wu , and v w is in P . Note that sub G sub is a binary relation on the strings of . The language of G , denoted L G , is the set of strings derivable from S in zero or more steps formally, the set of strings w such that for some s in S , s R w , where R is the transitive closure of sub G sub . Example The prefix grammar 0, 1 S 01, 10 P 0 010, 10 100 describes the language defined by the regular expression math 01 01 cup 100 math See also Regular grammar References reflist Category Formal languages hr Prefiksna gramatika ru zh ... more details
In computer programming , a prefix header is a feature found in some C programming language C or C compilers used to simplify code and or to reduce compilation time. Overview In the C programming language C and C programming languages, a header file is a computer file file whose text is included in another source file by the compiler , usually by the use of compiler directive s at the beginning of the source file. A prefix header differs from a normal header file in that it is automatically included at the beginning of every source file by the compiler, without the use of any compiler directives. Prefix headers are usually precompiled header pre compiled in order to reduce compilation times. Example On Mac OS X , the Xcode build system generates prefix headers automatically for new projects. A new Cocoa API Cocoa project, for instance, gets a prefix header that looks like this source lang objc ifdef OBJC import Cocoa Cocoa.h endif source As a result, it is unnecessary to explicitly include any of the above files in any Objective C code in the program, although doing so is harmless, in the case of Objective C because of the semantics of the code import code directive, but more generally with code include code because of the use of include guard s. Similar prefix headers are generated for other types of project. See also Header file Precompiled header External links http developer.apple.com mac library documentation DeveloperTools Conceptual XcodeBuildSystem 800 Reducing Build Times bs speed up build.html apple ref doc uid TP40002695 SW1 Xcode User Guide Using a Precompiled Prefix Header Category Source code Category C headers Category C ... more details
Expert subject Technology date March 2010 In telecommunications , the term cyclic prefix refers to the prefixing of a symbol data symbol with a repetition of the end. Although the receiver is typically configured to discard the cyclic prefix samples, the cyclic prefix serves two purposes. As a guard interval , it eliminates the intersymbol interference from the previous symbol. As a repetition of the end of the symbol, it allows the linear convolution of a frequency selective multipath channel to be modelled as circular convolution, which in turn may be transformed to the frequency domain using a discrete Fourier transform . This approach allows for simple frequency domain processing, such as channel estimation and equalization. In order for the cyclic prefix to be effective i.e. to serve its aforementioned objectives , the length of the cyclic prefix must be at least equal to the length of the multipath channel. Although the concept of cyclic prefix has been traditionally associated with OFDM systems, the cyclic prefix is now also used in single carrier systems to improve the robustness to multipath. Principle Cyclic prefix is often used in conjunction with modulation in order to retain sinusoid sinusoids properties in multipath propagation multipath channels. It is well known that sinusoidal signals are eigenfunctions of linear , and time invariant systems. Therefore, if the channel is assumed to be linear and time invariant , then a sinusoid of infinite duration would be an eigenfunction . However, in practice, this cannot be achieved, as real signals are always time limited. So, to mimic the infinite behavior, prefixing the end of the symbol to the beginning makes the linear ... this property in the part of the symbol after the cyclic prefix. Use in OFDM Cyclic Prefixes are used ... mathbf x 0 x 0 , x 1 , ldots x N 1 T math . Prefixing it with a cyclic prefix of length math L ... Tutorial Nisar.pdf the significance of cyclic prefix in OFDM systems . Category Quantized radio modulation ... more details
A trunk prefix is the number to be dialed in a domestic telephone call , preceding any necessary area code s and subscriber numbers. When the number is called from overseas, the trunk prefix is omitted by the caller. In most countries, such as Australia , Germany and the United Kingdom , the trunk prefix is 0. In the North American Numbering Plan it is 1. Example Further2 Local conventions for writing telephone numbers Assume a call is to be made to someone in the Australia n state of Queensland . A caller from outside Australia would dial the international access number international call prefix of the originating country 00 for many countries, 011 from NANP areas , then dial the country code in this case 61 , omit the trunk prefix, then dial the area code in this case 7 , and then the local number. So a caller in the UK would dial 00 61 7 3333 3333, while a caller in the USA would dial 011 61 7 3333 3333. Calling interstate e.g. from Western Australia , a caller would not dial an international access number or country code, but dial the trunk prefix in this case 0 then the area code, followed by the telephone number 0 7 3333 3333 Calling from within Queensland, one simply dials the telephone number 3333 3333. When conducting business e.g., on business card s or stationery, etc. , that number should be written as 61 7 3333 3333 and should include only the digits that must be dialed from abroad. The sign is used in place of the international access code. It has become common practice to write the number with the trunk prefix in parentheses, for example 61 0 7 3333 3333. However, someone calling this number from the USA would probably dial all the digits, resulting in a failed call. Citation needed date May 2012 ITU T Recommendation E.123 states that parentheses should not be used in the international notation. Countries still using trunk prefixes Open dialing plan Americas ... wtng glo.html Glossary World Telephone Numbering Guide. DEFAULTSORT Trunk Prefix Category Telephone ... more details
Multiple issues no footnotes August 2009 refimprove March 2009 context March 2009 The set of prefix es of right sentential form s that can appear on the stack of a shift reduce parser are called viable prefixes. An equivalent definition of a viable prefix is that it is a prefix of right sentential form that does not continue past the right end of the rightmost handle of that sentential form. By this definition, it is always possible to add terminal symbol s to the end of a viable prefix to obtain a right sentential form. Therefore, there is apparently no error as long as the portion of the input seen to a given point can be reduced to a viable prefix. Bibliography Database Systems The Complete Book with H. Garcia Molina and J. Widom , Prentice Hall Prentice Hall , Englewood Cliffs, New Jersey Englewood Cliffs, NJ , 2002. Introduction to Automata Theory, Languages, and Computation , with J. E. Hopcroft and R. Motwani , Addison Wesley, Reading MA, 1969, 1979, 2000. Elements of ML Programming , Prentice Hall, Englewood Cliffs, NJ, 1993, 1998. A First Course in Database Systems with J. Widom , Prentice Hall, Englewood Cliffs, NJ, 1997, 2002. Foundations of Computer Science with A. V. Aho , Computer science Computer Science Press, New York, 1992.C edition, 1994. Principles of Database and Knowledge Base Systems two volumes , Computer Science Press, New York, 1988, 1989. Compilers Principles, Techniques, and Tools with A. V. Aho and R. Sethi , Pearson PLC Addison Wesley , Reading MA, 1977, 1986. Computational Aspects of VLSI , Computer Science Press, 1984 Data Structures and Algorithms with A. V. Aho and J. E. Hopcroft , Addison Wesley, Reading MA, 1983. Principles of Compiler Design with A. V. Aho, Harkirat Singh , Addison Wesley, Reading, MA, 1977. Fundamental Concepts of Programming Systems , Addison Wesley, Reading MA, 1976. The Design and Analysis of Computer Algorithms with A. V. Aho and J. E. Hopcroft , Addison Wesley, Reading MA, 1974. Category Computing terminology ... more details
In computer science , the prefix sum , of a sequence of numbers math x sub 0 sub , x sub 1 sub , x sub ... s of prefix es running total s of the input sequence math 1 y sub 0 sub x sub 0 sub math 1 y sub 1 sub x sub 0 sub x sub 1 sub math 1 y sub 2 sub x sub 0 sub x sub 1 sub x sub 2 sub ... Prefix ... sub y sub i &minus 1 sub x sub i sub to compute each number in the prefix sum in sequence. However, despite their ease of computation, prefix sums are a useful primitive in certain algorithms such as counting ... programming languages. Prefix sums have also been much studied in parallel algorithm s, both ... algorithms. ref name lf80 ref name tv85 Mathematically, the operation of taking prefix sums can be generalized from finite to infinite sequences in that context, a prefix sum is known as a partial sum of a series mathematics series . Prefix summation or partial summation form linear operator s on the vector .... Functional programming In functional programming terms, the prefix sum may be generalized to any ... code scanl code and code scanl1 code , differing slightly in their argument signature, and the prefix ... result. Parallel algorithm File Prefix sum 16.svg thumb 300px Circuit representation of a 16 input parallel prefix sum A prefix sum can be calculated in parallel by the following steps. ref name ... 1 sub x sub 2 sub x sub 3 sub , etc. Recursively compute the prefix sum math w sub 0 sub , w sub 1 sub ... prefix sum math 1 y sub 0 sub x sub 0 sub , math 1 y sub 1 sub w sub 0 sub , math 1 y sub 2 sub ... there are more elements than processors. ref name lf80 Parallel algorithms for prefix sums can often ... sorting algorithm that uses the prefix sum of a histogram of key frequencies to calculate the position ..., can be viewed as computing a prefix sum on the sequence 1, 1, 1, ... and then mapping each item to the array position given by its prefix sum value by combining list ranking, prefix sums, and Euler ... application of parallel prefix sum algorithms was in the design of Adder electronics binary ... more details
Unreferenced date December 2009 A telephone prefix is the first set of digits of a telephone number in the North American Numbering Plan countries country code 1 , it is the first three digits out of a seven digit phone number. It shows which telephone exchange exchange the remaining numbers refer to. Some places restrict certain prefixes to only fax numbers or for mobile phone cell phone s while in other places the prefixes are random. Most but not all area codes reserve the prefix 555 telephone number 555 for special uses 555 1212 is telephone information in most area codes. For this reason, it is often used for phone numbers in television and movies. Failure to do so can cause a number of problems, as occurred with the release of the song 867 5309 Jenny causing hundreds of calls to the various people and organizations all over the U.S. that had that phone number. The film Bruce Almighty resulted in someone s real phone number being used, eventually leading to a lawsuit. See also Telephone numbering plan List of international call prefixes List of country calling codes DEFAULTSORT Telephone Prefix Category Telephone numbers eo Telefonprefikso hu K rzeth v sz m ... more details
The VEX prefix and VEX coding scheme is a proposed future extension to the x86 instruction set architecture ... description The proposed VEX coding scheme uses a code prefix consisting of 2 or 3 byte s which ... Intel Corporation date January 2009 ref The VEX prefix replaces the most commonly used instruction prefix bytes and Escape sequence escape codes . In many cases, the number of prefix bytes and escape bytes that are replaced is the same as the number of bytes in the VEX prefix, so that the total length ... cases, the VEX encoded version is longer or shorter than the legacy code. The VEX prefix contains the following components The bit, R, contained in the REX prefix used in the x86 64 instruction set extension ..., F2, F3 . The three byte VEX prefix additionally contains The three bits, X B and W, also contained in the REX prefix used in the x86 64 instruction set extension. Five bits named m. Two of the m bits ... to ensure that the second byte of a VEX prefix is always of this form in 32 bit mode. R& 773 , X& 773 and B& 773 bits are inversion of the REX prefix s R, X and B bits these provide a fourth ..., respectively allowing access to 16 instead of 8 registers. The W bit is equivalent to the REX prefix ... prefix bytes. The values 1, 2 and 3 are equivalent to opcode prefixes 0F, 0F 38 and 0F 3A all other values are currently reserved. The 2 byte VEX prefix always corresponds to the 0F prefix .... p encodes additional prefix bytes. The values 0, 1, 2, and 3 correspond to implied prefixes of none ... prefix can have up to five operands. At most one of the operands can be a memory operand and at most ... the VEX prefix to be applied only to instructions using the Streaming SIMD Extensions SIMD XMM registers. However, the VEX coding scheme has space for applying the VEX prefix to other instructions as well in future instruction sets. Legacy SIMD instructions with a VEX prefix added are equivalent to the same instructions without VEX prefix with the following differences The VEX encoded instruction ... more details
Use dmy dates date February 2012 common metric prefixes A metric prefix or SI prefix is a unit prefix that precedes a basic unit of measure to indicate a decimal decadic multiple mathematics multiple or fraction mathematics fraction of the unit. Each prefix has a unique symbol that is prepended to the unit symbol. The prefix kilo , for example, may be added to gram to indicate multiplication by one thousand one kilogram is equal to one thousand grams 1 km gaps 1 000 m . The prefix ... There are twenty prefixes officially specified by SI. SI prefixes Each prefix name has an associated ..., not the gram already contains a prefix. So milligram mg is used instead of microkilogram kg ... forms, any size prefix is considered part of the unit, and thus included in the exponentiation ... confusion, prefix symbols and prefixes are not used with the time related unit symbols names ... Celsius C . NIST http physics.nist.gov Pubs SP811 sec06.html states Prefix symbols may be used with the unit ... accepted pronunciations for the prefix giga IPAc en and IPAc en d . According ... Electrotechnical Commission proposed giga as a prefix for 10 sup 9 sup , drawing on a verse by the humorous ... an SI prefix is affixed to a root word, the prefix carries the stress linguistics stress , while the root ... system have fallen into disuse and were not adopted into the SI. The prefix myria , ten thousand, ref ... field a series of binary prefix es is used with the information units the bit and byte . Being based ... Order of magnitude Scientific notation Number prefix References FOLDOC Reflist External links http ... units SI units navbox orders of magnitude wide DEFAULTSORT Si Prefix Category SI prefixes Category ... SI ka lt SI sistemos prie d liai hu SI prefixum mk SI nl SI prefix ja SI ... Prefix SI ru sq Parashtesat e Sistemit Nd rkomb tar sl Predpone SI sr fi Kansainv linen yksikk j rjestelm Kerrannaisyksik t sv SI prefix th uk ... more details
In acoustics , the prefix of a sound is an initial phase, the onset of a sound quite dissimilar to the ensuing lasting vibration . The term was coined by J. F. Schouten 1968, 42 , who called it one of at least five major acoustic parameters that determine the elusive attributes of timbre . See also Onset audio Timbre Attributes Synthesizer ADSR envelope Transient acoustics References Schouten, J. F. 1968 . The Perception of Timbre . In Reports of the 6th International Congress on Acoustics, Tokyo, GP 6 2 , 6 vols., edited by Y. Kohasi, 6 35 44, 90. Tokyo Maruzen Amsterdam Elsevier. Category Acoustics Category Auditory perception Category Hearing Sci stub music stub ... more details
A unit prefix is a specifier or mnemonic that is prepended to units of measurement . Units of various order of magnitude sizes are commonly formed by the use of such prefix es. The metric prefixes prefixes of the metric system , such as kilo and milli , are well known examples. These represent multiplication by exponentiation powers of ten. In the information technology field it is common to use binary ... which official support have been dropped. Metric prefixes common metric prefixes main Metric prefix ... mathematics multiple or fraction mathematics fraction of the unit. Each prefix has a unique ... by the 11th Conf rence g n rale des poids et mesures CGPM conference in 1960. The prefix myria has ... Bit and byte prefixes main Binary prefix A binary prefix indicates multiplication by a power of two ... formerly subclauses 3.8 and 3.9 of IEC 60027 IEC 60027 2 2005 Each binary prefix is formed from the first syllable of the decimal prefix with the similar value, and the syllable bi . The symbols are the decimal ... sup . ref cite web url http www.numericana.com answer units.htm prefix title Current and Deprecated ... prefix is bronto , which has been used in the term brontobyte to represent anything from 10 sup ... is 10 sup 15 sup bytes ref SI has already produced standard prefixes for 10 sup 15 sup Peta prefix ... Hella word hella as the SI prefix for 10 sup 27 sup , a movement that began on the campus of UC Davis ... for figures with 27 zeros after the first digit. ref The prefix, which has since appeared in the San ... 6 id quote ...a proposed metric prefix...useful for describing mega measurements like Earth s mass ... http www.facebook.com pages The Official Petition to Establish Hella as the SI Prefix for 1027 277479937276?v info title The Official Petition to Establish Hella as the SI Prefix for 10 27 accessdate ... of the non SI prefix vendeka to represent 10 to the power of 33, as in vendekabyte. Category Prefixes fr Pr fixe d unit non SI nl Prefix niet behorend tot het SI ja SI pl Myria vi C c ti n ... more details
, U n , V9, X n , YZ , Z4&ndash Z9, 4N . Indicates a prefix that has recently been returned to the ITU ... operators operating in a disputed territory or in a nation state that has no official prefix e.g. ... 9W Malaysia 9X Rwanda 9Y&ndash 9Z Trinidad and Tobago See also ITU prefix amateur and experimental ... date March 2011 DEFAULTSORT Itu Prefix Category Call signs Category Amateur radio call signs ast Llista de prefixos radiof nicos ca Prefix radiof nic de ITU Pr fix es Anexo Prefijos radiof nicos gl Prefixo radiof nico id Awalan ITU it Prefissi ITU ms Awalan ITU nl Prefix radio ja ... more details
Bit and byte prefixes In computing, a binary prefix is a specifier or mnemonic that is prepended to the Units ... unit or binary prefix. In most other contexts, the industry uses kilo , mega , giga , etc., in a manner ... to powers of 1024. According to these, the SI prefix es would only be used in the decimal sense ..., although K is the SI unit for temperature kelvin and should not be mixed up with k, the SI prefix ... prefix was born. ref group defn. name d.binpref Another style was to truncate the last 3 digits and append K, essentially using K as a decimal prefix ref group defn. name d.decpref similar to SI ... hard drive sizes using the customary binary prefix GB as it is used for RAM would display this as 279.4 .... In the 1980s, as capacities of both types of devices increased, the SI prefix G, with SI meaning, was commonly .... In the 1990s, the prefix G, in its binary meaning, became commonly used for computer memory capacity. The first terabyte SI prefix, gaps 1 000 000 000 000 bytes hard disk drive was introduced in 2007 ...?tp &arnumber 26589&isnumber 1030 quote kilo K . 1 A prefix indicating 1000. 2 In statements involving size of computer storage, a prefix indicating 2 sup 10 sup , or 1024. mega M . 1 A prefix indicating one million. 2 In statements involving size of computer storage, a prefix indicating 2 sup 20 ... k or K 1 A prefix indicating 1000. 2 In statements involving size of computer storage, a prefix indicating 2 sup 10 sup , or 1024. mega M . 1 A prefix indicating one million. 2 In statements involving size of computer storage, a prefix indicating 2 sup 20 sup , or 1048576. The binary units Kbyte ... prefix. Image Binaryvdecimal.svg thumb right 200px Linear log graph of percentage of the difference ... margin auto class wikitable style background ccf Prefix Bin Dec Dec Bin Percentage difference kilo ... systems generally presented hard disk drive capacity in decimal digits with no prefix of any ... SI prefix es. Image Windows XP Disk management for 160 GB disk.png Windows XP disk management application ... more details
Number prefixes are prefix es derived from number s or Numeral linguistics numeral s. In English and other European languages, they are used to coin numerous series of words, such as unicycle bicycle tricycle, dyad triad decade, biped quadruped, September October November December, decimal hexadecimal, sexagenarian octogenarian, centipede millipede , etc. There are two principal systems, taken from Latin and Greek language Greek , each with several subsystems in addition, Sanskrit occupies a marginal position. ref name Sanskrit See Mendeleev s predicted elements for the most common use of Sanskrit numerical prefixes. ref There is also an international set of SI prefix es, which are used in the metric system , and which for the most part are either distorted from the forms below or not based on actual number words. Table of number prefixes in English In the following prefixes, a final vowel is normally dropped before a root that begins with a vowel, with the exceptions of bi , which is bis before a vowel, and of the other monosyllables, du , di , dvi , tri , which are invariable. The cardinal series are derived from cardinal number s, such as English one, two, three. The multiple series are based on adverbial numbers like English once, twice, thrice. The distributives originally meant one each, two each or one by one, two by two, etc., though that meaning is now frequently lost. The ordinal ... sin is found in the words simplex, simple. ref singul prim hen ref name mono The Greek prefix for one ... nona nona . They occur as prefixes to units of measure in the SI system. See SI prefix . They occur ..., though. Systematic name s and words comprising SI prefix es and binary prefixes are not hyphenated ... penta , for example. See its etymology for details. The root language of a numerical prefix need ..., uses the numerical prefixes derived from Greek, except for the prefix for 9 as mentioned ... In organic chemistry, the prefix for 9 is Latin rather than Greek ref decane , ... eicosane monopod ... more details
Refimprove date January 2009 A ship prefix is a combination of letters, usually abbreviations, used in front of the name of a civilian or naval ship . Prefixes for civilian vessels may either identify the type of propulsion, such as SS for steamship , or purpose, such as RV for research vessel . Civilian prefixes are often used inconsistently, and frequently not at all. Sometimes a slash is used to separate the letters, as in M S . Naval prefixes came into use as abbreviations for longer titles, such as His Her Majesty s Ship in the Royal Navy , abbreviated H.M.S. and then HMS . Earlier uses often ... States Navy . Today the common practice is to use a single prefix for all warship s of a nation ... writers follow the practice of the navy and omit any prefix. From the 20th century onwards, most navies ... 120 Prefix align left Meaning AHT Anchor handling tug Anchor Handling Tug AHTS Anchor handling ... National or military prefixes class wikitable style font size 95 Country Service Prefix Meaning rowspan ... Military of Belgium Belgian Navy BNS Belgium Naval Ship NATO prefix BRU Royal Brunei Navy KDB Kapal ... s Ship flag Nazi Germany Kriegsmarine &mdash no prefix some authors use DKM for Deutsche Kriegsmarine ... Japanese Navy &mdash no prefix some authors use HIJMS for His Imperial Japanese Majesty s Ship and IJN ... Denholm ships SD Vessels previously operated under RMAS prefix that are now operated under contract ... navies for the Dominions. In the Royal Netherlands Navy , HNLMS is the prefix in English, a translation ... ship officially enters active service in the fleet, the ship s name is used without the prefix. Citation needed date August 2010 In Australia, the prefix NUSHIP is used to denote ships that have yet ... list, a ship typically has the prefix ex added to its name, to distinguish it from any active ... ship types, would be given the prefix Empire ship Empire to their name. This applied to ships acquired ... 2010 DEFAULTSORT Ship Prefix Category Ship prefixes da Skibstypeforkortelse de Pr fixe von Schiffsnamen ... more details
A prefix hash tree PHT is a distributed data structure that enables more sophisticated queries over a distributed hash table DHT . The prefix hash tree uses the lookup interface of a DHT to construct a trie based data structure that is both efficient updates are doubly logarithmic in the size of the domain being indexed , and resilient the failure of any given node in a prefix hash tree does not affect the availability of data stored at other nodes . External links http berkeley.intel research.net sylvia pht.pdf Prefix Hash Tree An Indexing Data Structure over Distributed Hash Tables http pier.cs.berkeley.edu PHT was developed as part of work on the PIER project. See also Prefix tree P Grid Category Distributed data storage compu sci stub ja Prefix hash tree ... more details
Refimprove date October 2007 Longest prefix match also called Maximum prefix length match refers to an algorithm used by Router computing router s in Internet Protocol IP networking to select an entry from a routing table . ref cite book first Douglas title Computer Networks and Internets year 2008 pages 368 isbn 978 0136066989 edition 5th ref Because each entry in a routing table may specify a network, one destination address may match more than one routing table entry. The most specific table entry &mdash the one with the highest subnet mask &mdash is called the longest prefix match. It is called this because it is also the entry where the largest number of leading address bits in the table entry match those of the destination address. For example, consider this IPv4 routing table CIDR notation is used 192.168.20.16 28 192.168.0.0 16 When the address tt 192.168.20.19 tt needs to be looked up, both entries in the routing table match . That is, both entries contain the looked up address. In this case, the longest prefix of the candidate routes is tt 192.168.20.16 28 tt , since its subnet mask 28 is higher than the other entry s mask 16 , making the route more specific. Routing tables often contain a default route , which has the shortest possible prefix match, to fall back on in case matches with all other entries fail. See also Network Search Engine hardware accelerator used in routers for LPM lookups. Trie prefix tree References references Category Routing protocols Category Internet architecture de Longest Prefix Match it Longest prefix match zh ... more details
The International Telecommunication Union ITU allocates call sign ITU prefixprefix es for radio station ... sign An amateur operator s call sign is composed of a prefix, a separating numeral and a suffix. The prefix ... aligned, table centered Call Sign Prefix within ITU assigned range Separating numeral Suffix format ... character prefix chosen from a range assigned by the ITU to the amateur s country of operation ... of citizenship. An individual operator is assigned a unique call sign beginning with this prefix ... of 9WA 9WZ Malaysia 9XA 9XZ Rwandese Republic 9YA 9ZZ Trinidad and Tobago A unique international prefix ... within its assigned range When a 1 letter prefix is enough This is only possible when the whole ... K prefix as the US is assigned the whole K block. As numbers warrant the US can also assign prefixes KA , KB , KC and so forth as needed. A single letter prefix is also possible for block ranges beginning ... jurisdictions, so a callsign prefix with a single A does not uniquely distinguish any of them. Korea ... s longest seawall ref The D9 is the ITU prefix for South Korea, so they have issued a call with no separating ... C6Z block, and the 6 is part of the 2 character prefix. Examples are as found on QRZ.COM C6AFO, C6AGB ... letter suffix. When a 3 character prefix is needed This is an unsusal situation and occurs with callsigs ... do not. Fiji has issued many call signs with a 3D prefix and a 2 numeral separator. In theory ... and suffix The jurisdiction then assigns a single digit a numeral to separate prefix from suffix as well ... to their assigned prefix es . The resulting call sign must uniquely identify a ham radio operator within that jurisdiction. Sometimes the prefix plus separating numeral is together referred to as the prefix .... General formats In general an amateur radio callsign is of one of these forms where P prefix character ... cases of them being issued by national bodies. N a single numeral which separates prefix from ... always have one of the following forms PNS , 1x1 call sign usually for a special event, the prefix ... more details
IPv6 prefix translation is an experimental specification for IPv6 trying to achieve the address independence given by Network Address Translation NAT in IPv4. It has less downsides than traditional IPv4 NAT, it is for example Stateless protocol stateless and preserves the end to end principle . But still breaks any protocol embedding IPv6 addresses, for example IPsec , and requires a more complex DNS setup split horizon DNS . ref name wasserman Cite web last Wasserman first Margaret coauthors Fred Baser title RFC 6296 IPv6 to IPv6 Network Prefix Translation work ietf.org accessdate 2012 04 30 date 2011 06 url https tools.ietf.org html rfc6296 ref One use case for IPv6 prefix translation is easy multihoming for small entities, this can however also be solved with DHCPv6 . ref name troan Cite web last Troan first O. coauthors D. Miles, S. Matsushima, T. Okimoto, D. Wing title IPv6 Multihoming without Network Address Translation work ietf.org accessdate 2012 04 30 url https tools.ietf.org html draft ietf v6ops ipv6 multihoming without ipv6nat ref Not sure what to do with these, no idea what they say. ref name zhangyi Cite conference pages 608 613 last Zhangyi first Y. coauthors M. Yan, F. Baker, H. Xiaohong, Z. Xiaodong title The implementation of NAT66 and the olutions sic of multi homing in NAT66 environment booktitle Industrial Engineering and Engineering Management, 2009. IE&EM 09. 16th International Conference on year 2009 ref ref Cite conference pages 614 618 last Qi first L. coauthors T. Xiongyan, M. Yan, F. Baker title Implementing HIP in IPV6 IPV6 network on solving multi homing booktitle Broadband Network & Multimedia Technology, 2009. IC BNMT 09. 2nd IEEE International Conference on year 2009 ref References references Category IPv6 Category Network address translation network stub ... more details
The Program Segment Prefix PSP is a data structure used in DOS systems to store the state of a computer program program . It resembles the Zero page CP M Zero Page in the CP M operating system. The PSP has the following structure border 1 width 100 class wikitable Offset Size Contents 00h 01h 2 bytes code CP M exit always contain INT 20h 02h 03h Word data type word 2 bytes Memory size in paragraphs 04h byte Reserved 05h 09h 5 bytes code Far call to CP M compatibility code within DOS 0Ah 0Dh dword 4 bytes Terminate address of previous program old INT 22h 0Eh 11h dword Break address of previous program old INT 23h 12h 15h dword Critical error address of previous program old INT 24h 16h 17h word Caller s PSP segment usually command.com internal 18h 2Bh 20 bytes Job File Table internal 2Ch 2Dh word Environment variable Environment segment 2Eh 31h dword SS SP on entry to last INT 21h call Internal 32h 33h word Max open files Internal see below 34h 37h dword Handle entries address Internal see below 38h 4Fh 24 bytes Reserved 50h 52h 3 bytes code Far call to DOS always contain INT 21h RETF 53h 5Bh 9 bytes Reserved 5Ch 6Bh 16 bytes Unopened Standard File control block FCB 1 6Ch 7Fh 20 bytes Unopened Standard FCB 2 overwritten if FCB 1 is opened 80h 1 byte Number of bytes on command line 81h FFh 127 bytes Command line terminated by a Carriage return 0Dh The PSP is most often used to get the command line arguments of a DOS program, for example the command foo.exe a f executes foo.exe with the arguments a and f . The segment address of the PSP is passed in the DS register when the program is executed. It can also be determined later by using interrupt 21h subfunction 62h. This interrupt will return the PSP address in register BX. ref cite web url http www.htl steyr.ac.at morg pcinfo ... technology de Program Segment Prefix es Prefijo del Segmento de Programa fr Pr fixe de Segment de Programme he Program Segment Prefix ru Program Segment Prefix ... more details
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