23-letter words containing o, r, b, i, c
- abstract interpretation — (theory) A partial execution of a program which gains information about its semantics (e.g. control structure, flow of information) without performing all the calculations. Abstract interpretation is typically used by compilers to analyse programs in order to decide whether certain optimisations or transformations are applicable. The objects manipulated by the program (typically values and functions) are represented by points in some domain. Each abstract domain point represents some set of real ("concrete") values. For example, we may take the abstract points "+", "0" and "-" to represent positive, zero and negative numbers and then define an abstract version of the multiplication operator, *#, which operates on abstract values: *# | + 0 - ---|------ + | + 0 - 0 | 0 0 0 - | - 0 + An interpretation is "safe" if the result of the abstract operation is a safe approximation to the abstraction of the concrete result. The meaning of "a safe approximation" depends on how we are using the results of the analysis. If, in our example, we assume that smaller values are safer then the "safety condition" for our interpretation (#) is a# *# b# <= (a * b)# where a# is the abstract version of a etc. In general an interpretation is characterised by the domains used to represent the basic types and the abstract values it assigns to constants (where the constants of a language include primitive functions such as *). The interpretation of constructed types (such as user defined functions, sum types and product types) and expressions can be derived systematically from these basic domains and values. A common use of abstract interpretation is strictness analysis. See also standard interpretation.
- abstract window toolkit — (graphics) (AWT) Java's platform-independent windowing, graphics, and user-interface toolkit. The AWT is part of the Java Foundation Classes (JFC) - the standard API for providing a graphical user interface (GUI) for a Java program. Compare: SWING.
- atrioventricular bundle — a bundle of specialized muscle fibers regulating the heartbeat by conducting impulses from the right atrium to the ventricles.
- australopithecus boisei — an extinct species of very rugged, large-toothed bipedal hominid, formerly known as Zinjanthropus boisei, that lived in eastern Africa one to two million years ago.
- backwards compatibility — backward compatibility
- bank-and-turn indicator — a flight instrument that combines a bank indicator and turn indicator in a single unit.
- barrister and solicitor — an attorney who is licensed to prepare cases and argue them in court in the common-law provinces of Canada and in New Zealand and Australia.
- battered child syndrome — the array of physical injuries exhibited by young children who have been beaten repeatedly or otherwise abused by their parents or guardians.
- be on the receiving end — to be the recipient of a gift, or favor
- bereavement counselling — the provision of advice for bereaved people to help them cope with their grief, sometimes given by charities and support groups
- black-throated whipbird — an Australian whipbird, Psophodes nigrogularis
- branch coverage testing — (programming) A test method which aims to ensure that each possible branch from each decision point (e.g. "if" statement) is executed at least once, thus ensuring that all reachable code is executed.
- branch on chip box full — (humour) (BCBF) A mythical IBM 1130 instruction whose action depended on the contents of the chip box. This was one of a long list of fake assembly language instructions that went around Indiana University in the 1970s.
- broadcast quality video — (communications, multimedia) Roughly, video with more than 30 frames per second at a resolution of 800 x 640 pixels. The quality of moving pictures and sound is determined by the complete chain from camera to receiver. Relevant factors are the colour temperature of the lighting, the balance of the red, green and blue vision pick-up tubes to produce the correct display colour temperature (which will be different) and the gamma pre-correction to cancel the non-linear characteristic of cathode-ray tubes in television receivers. The resolution of the camera tube and video coding system will determine the maximum number of pixels in the picture. Different colour coding systems have different defects. The NTSC system (National Television Systems Committee) can produce hue errors. The PAL system (Phase Alternation by Line) can produce saturation errors. Television modulation systems are specified by ITU CCIR Report 624. Low-resolution systems have bandwidths of 4.2 MHz with 525 to 625 lines per frame as used in the Americas and Japan. Medium resolution of 5 to 6.5 MHz with 625 lines is used in Europe, Asia, Africa and Australasia. High-Definition Television (HDTV) will require 8 MHz or more of bandwidth. A medium resolution (5.5 MHz in UK) picture can be represented by 572 lines of 402 pixels. Note the ratio of pixels to lines is not the same as the aspect ratio. A VGA display (480n lines of 640 pixels) could thus display 84% of the height of one picture frame. Most compression techniques reduce quality as they assume a restricted range of detail and motion and discard details to which the human eye is not sensitive. Broadcast quality implies something better than amateur or domestic video and therefore can't be retained on a domestic video recorder. Broadcasts use quadriplex or U-matic recorders. The lowest frame rate used for commercial entertainment is the 24Hz of the 35mm cinema camera. When broadcast on a 50Hz television system, the pictures are screened at 25Hz reducing the running times by 4%. On a 60Hz system every five movie frames are screened as six TV frames, still at the 4% increased rate. The six frames are made by mixing adjacent frames, with some degradation of the picture. A computer system to meet international standard reproduction would at least VGA resolution, an interlaced frame rate of 24Hz and 8 bits to represent the luminance (Y) component. For a component display system using red, green and blue (RGB) electron guns and phosphor dots each will require 7 bits. Transmission and recording is different as various coding schemes need less bits if other representations are used instead of RGB. Broadcasts use YUV and compression can reduce this to about 3.5 bits per pixel without perceptible degradation. High-quality video and sound can be carried on a 34 Mbaud channel after being compressed with ADPCM and variable length coding, potentially in real time.
- calcium channel blocker — any drug that prevents the influx of calcium ions into cardiac and smooth muscle: used to treat high blood pressure and angina
- camillo benso di cavour — Camillo Benso di [kah-meel-law ben-saw dee] /kɑˈmil lɔ ˈbɛn sɔ di/ (Show IPA), 1810–61, Italian statesman: leader in the unification of Italy.
- cheyne-stokes breathing — alternating shallow and deep breathing, as in comatose patients
- chi-square distribution — a continuous single-parameter distribution derived as a special case of the gamma distribution and used esp to measure goodness of fit and to test hypotheses and obtain confidence intervals for the variance of a normally distributed variable
- church of the subgenius — (body, humour) A mutant offshoot of Discordianism launched in 1981 as a spoof of fundamentalist Christianity by the "Reverend" Ivan Stang, a brilliant satirist with a gift for promotion. Popular among hackers as a rich source of bizarre imagery and references such as "Bob" the divine drilling-equipment salesman, the Benevolent Space Xists, and the Stark Fist of Removal. Much SubGenius theory is concerned with the acquisition of the mystical substance or quality of slack.
- civil aeronautics board — the former federal agency (1938–85) that regulated airline fares and assigned routes. Abbreviation: CAB, C.A.B.
- columbus air force base — U.S. Air Force installation in NE Mississippi, NW of Columbus.
- combinatorial chemistry — the use of chemical methods to generate all possible combinations of chemicals
- communication breakdown — a lack of communication; a failure to exchange information
- compact disc recordable — (storage) (CD-R) A write-once version of CD-ROM. CD-Rs can hold about 650 megabytes of data. They are very durable and can be read by normal CD-ROM drives, but once data has been written it cannot be altered. Standard prerecorded CDs have their information permanently stamped into an aluminium reflecting layer. CD-R discs have a dye-based recording layer and an additional golden reflecting layer. Digital information is written to the disc by burning (forming) pits in the recording layer in a pattern corresponding to that of a conventional CD. The laser beam heats the substrate and recording layer to approximately 250 C. The recording layer melts and the substrate expands into the space that becomes available. See also CD-RW and DVD-RAM.
- compact disc rewritable — (storage) (CD-RW) A rewritable version of CD-ROM. A CD-RW drive can write about 650 megabytes of data to CD-RW media an unlimited number of times. Most CD-RW drives can also write once to CD-R media. CD-RW media cannot be read by CD-ROM drives built prior to 1997 due to the reduced reflectivity (15% compared to 70%) of CD-RW media. CD-RW drives and media are currently (1999) more expensive than CD-R drives and media. CD-R is sometimes considered a better technology for archival purposes as the data cannot be accidentally modified or tampered with, and encourages better archival practices. Standard prerecorded CDs have their information permanently stamped into an aluminium reflecting layer. CD-WR discs have a phase-change recording layer and an additional silver (aluminium) reflecting layer. A laser beam can melt crystals in the recording layer into a non-crystalline amorphous phase or anneal them slowly at a lower temperature back to the crystalline state. The different reflectance of the areas make them appear as the 'pits' and 'lands' of a standard CD. See also CD-R and DVD-RAM.
- computer-based training — Computer-Aided Instruction
- conditional probability — the probability of one event, A, occurring given that another, B, is already known to have occurred: written P(A|B) and equal to P(A and B)|P(B)
- contributory negligence — failure by an injured person to have taken proper precautions to prevent an accident
- criminal records bureau — (in England and Wales) a service offering employers and voluntary organizations access to police, health, and education records
- cut sb's umbilical cord — If you say that one person, organization, or country has cut its umbilical cord with another, you mean that they have done something that makes them more independent.
- diamondback rattlesnake — either of two large, highly venomous rattlesnakes of the genus Crotalus, having diamond-shaped markings on the back.
- digital subscriber loop — Digital Subscriber Line
- dishonourable discharge — dismissal from the US armed forces by a court martial as a result of serious misconduct
- electronic file cabinet — a device, controlled by software, for the storage and retrieval of information
- embarrassment of riches — If you say that someone has an embarrassment of riches, you mean that they have so many good things that these things are a problem.
- every trick in the book — If someone tries every trick in the book, they try every possible thing that they can think of in order to achieve something.
- gamma-aminobutyric acid — GABA.
- hollerithabetical order — (algorithm) Sorted into the order a standard Hollerith card sorting machine produces, with special characters interleaved within the alphabet.
- identification bracelet — a bracelet, usually of metal links, having an identification plate for the name of the wearer.
- in someone's bad graces — elegance or beauty of form, manner, motion, or action: We watched her skate with effortless grace across the ice. Synonyms: attractiveness, charm, gracefulness, comeliness, ease, lissomeness, fluidity. Antonyms: stiffness, ugliness, awkwardness, clumsiness; klutziness.
- initial public offering — An initial public offering is the first offering of stock when a company goes public.
- invertible counterpoint — counterpoint in which the voices, while retaining their original form, may be interchanged above or below one another in any order.
- irish christian brother — Brother of the Christian Schools (def 2).
- ivory-billed woodpecker — a large, nearly extinct, black and white woodpecker, Campephilus principalis, of the southern U.S. and Cuba, having an ivory-colored bill.
- juan rodriguez cabrillo — Juan Rodríguez [rod-ree-ges] /rɒdˈri gɛs/ (Show IPA), (Joao Rodrigues Cabrilho) 1499?–1543, Spanish explorer, born in Portugal: discovered California.
- lackland air force base — U.S. Air Force installation in SW central Texas, SW of San Antonio.
- laughlin air force base — U.S. Air Force installation in SW Texas, SE of Del Rio.
- lawrence livermore labs — Lawrence Livermore National Laboratory
- micro assembly language — (language) (MAL) A microprogramming language with high-level syntax, used in the reference below. See also Mic-1, Mac-1.
- nonverbal communication — gesture and facial expression
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