23-letter words containing a, d, o, u, t
- adaptive cruise control — Adaptive cruise control is an electronic control system in a vehicle that makes sure that the vehicle keeps a safe distance from vehicles in front.
- adjusting journal entry — An adjusting journal entry is a journal entry that is made to correct an error or update an account.
- alpes-de-haute provence — a department in SE France. 2698 sq. mi. (6990 sq. km). Capital: Digne.
- alpes-de-haute-provence — a department of SE France in Provence-Alpes-Côte-d'Azur region. Capital: Digne. Pop: 144 508 (2003 est). Area: 6988 sq km (2725 sq miles)
- alpha-ketoglutaric acid — a dibasic keto acid, C 5 H 6 O 5 , that occurs as an intermediate in the Krebs' cycle and in protein metabolism.
- astro-inertial guidance — celestial guidance.
- asymmetrical modulation — (communications) A scheme to maximise use of a communications line by giving a larger share of the bandwidth to the modem at the end which is transmitting the most information. Only one end of the connection has full bandwidth, the other has only a fraction of the bandwidth. Normally, which end gets the full bandwidth is chosen dynamically. Asymmetrical modulation was made famous by the HST mode of the early high-speed modems from US Robotics.
- atrioventricular bundle — a bundle of specialized muscle fibers regulating the heartbeat by conducting impulses from the right atrium to the ventricles.
- bank-and-turn indicator — a flight instrument that combines a bank indicator and turn indicator in a single unit.
- beyond reasonable doubt — if something is proved beyond reasonable doubt, it is legally accepted as being true
- black and tan coonhound — one of an American breed of large, powerful hound dogs having a short, dense, black coat with tan markings above the eyes and on the muzzle, chest, legs, feet, and breech, and low-set, drooping ears, used for hunting raccoons, opossums, and other larger game.
- 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.
- business administration — a program of studies at a college or university covering finance, management of personnel, etc., designed to prepare a person for a career in business
- catch someone off guard — If someone catches you off guard, they surprise you by doing something you do not expect. If something catches you off guard, it surprises you by happening when you are not expecting it.
- 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
- chief education officer — an official who is the chief administrative officer of a Local Education Authority
- civil aeronautics board — the former federal agency (1938–85) that regulated airline fares and assigned routes. Abbreviation: CAB, C.A.B.
- classification schedule — the printed scheme of a system of classification
- communication breakdown — a lack of communication; a failure to exchange information
- complain about the food — If you complain about the food, you say that you are not satisfied with it.
- computer-aided learning — Computer-Aided Instruction
- computer-based training — Computer-Aided Instruction
- computerized tomography — a radiological technique that produces images of cross sections through a patient's body using low levels of radiation
- concrete data structure — (theory) (CDS) A model of programming language terms developed in the context of constructing fully abstract semantics for sequential languages. A CDS is a 4-tuple (C,V,E,|-) where C is a cell, V is a value, E is an event and |- is an "enabling relation". An event is a cell and a value. A cell C is "enabled" by a set of events S if S |- C. A state is a set of events which are consistent in that the values they give for any cell are all equal. Every cell in a state is enabled.
- corridor of uncertainty — an area of a wicket just outside a batsman's off stump, so located that the batsman will have difficulty in deciding whether or not to play a ball bowled into it
- 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.
- dark-field illumination — illumination of the field of a microscope from the side so that the specimen is viewed against a dark background
- data acquisition system — A data acquisition system is a system that acquires data, generally by digitizing analog channels and storing the data in digital form.
- department of education — the department of the U.S. federal government that administers federal programs dealing with education: created in 1979, largely by transfer from part of the former Department of Health, Education, and Welfare. Abbreviation: ED.
- deterministic automaton — (theory) A finite-state automaton in which the overall course of the computation is completely determined by the program, the starting state, and the initial inputs. The class of problems solvable by such automata is the class P (see polynomial-time algorithm).
- dichlorodifluoromethane — a colourless nonflammable gas easily liquefied by pressure: used as a propellant in aerosols and fire extinguishers and as a refrigerant. Formula: CCl2F2
- dictionary of computing — Free On-line Dictionary of Computing
- digital subscriber loop — Digital Subscriber Line
- discontinuous variation — variation in phenotypic traits in which types are grouped into discrete categories with few or no intermediate phenotypes. Compare continuous variation.
- disjunctive normal form — (DNF) A logical formula consisting of a disjunction of conjunctions where no conjunction contains a disjunction. E.g. the DNF of (A or B) and C is (A and C) or (B and C).
- drummond of hawthornden — William. 1585–1649, Scottish poet, historian, and royalist pamphleteer
- dual sensory impairment — the condition of being affected by sight and hearing loss
- duplication of the cube — the insoluble problem of constructing a cube having twice the volume of a given cube, using only a ruler and compass.
- earthquake-proof design — Earthquake-proof design is design which will not be badly damaged by earthquakes or tsunamis.
- eastern orthodox church — Orthodox Church (def 1).
- eating your own dogfood — eating one's own dogfood
- education correspondent — a journalist who reports news in the field of education or teaching
- encapsulated postscript — (EPS) An extension of the PostScript graphics file format developed by Adobe Systems. EPS is used for PostScript graphics files that are to be incorporated into other documents. An EPS file includes pragmas (special PostScript comments) giving information such as the bounding box, page number and fonts used. On some computers, EPS files include a low resolution version of the PostScript image. On the Macintosh this is in PICT format, while on the IBM PC it is in TIFF or Microsoft Windows metafile format.
- fifth marquis lansdowne — Henry Charles Keith, 5th Marquis of Lansdowne, Lansdowne, 5th Marquis of.
- fish in troubled waters — any of various cold-blooded, aquatic vertebrates, having gills, commonly fins, and typically an elongated body covered with scales.
- friction reducing agent — A friction reducing agent is an additive used to reduce friction exerted downhole on tools and pipes.
- fundamental interaction — any of the four basic interactions that occur in nature: the gravitational, electromagnetic, strong, and weak interactions
- gamma-aminobutyric acid — GABA.
- grand duchess charlotte — Grand Duchess (Charlotte Aldegonde Elise Marie Wilhelmine) 1896–1985, sovereign of Luxembourg 1919–64.
- heaviside unit function — the function that is zero for any number less than zero and that is 1 for any number greater than or equal to zero.
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