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slovo definícia archimedes (encz) Archimedes,řecký matematik Zdeněk Brož Archimedes (gcide) Archimedes \Ar`chi*me"des\, n. (Paleon.) An extinct genus of Bryzoa characteristic of the subcarboniferous rocks. Its form is that of a screw. [1913 Webster] archimedes (wn) Archimedes n 1: Greek mathematician and physicist noted for his work in hydrostatics and mechanics and geometry (287-212 BC) archimedes (foldoc) Archimedes Acorn Archimedes A family of microcomputers produced by {Acorn Computers}, Cambridge, UK. The Archimedes, launched in June 1987, was the first RISC based personal computer (predating Apple Computer's Power Mac by some seven years). It uses the Advanced RISC Machine (ARM) processor and includes Acorn's multitasking operating system and graphical user interface, RISC OS on ROM, along with an interpreter for Acorn's enhanced BASIC, BASIC V. The Archimedes was designed as the successor to Acorn's sucessful BBC Microcomputer series and includes some backward compatibility and a 6502 emulator. Several utilities are included free on disk (later in ROM) such as a text editor, paint and draw programs. Software emulators are also available for the IBM PC as well as add-on Intel processor cards. There have been several series of Archimedes: A300, A400, A3000, A5000, A4000 and RISC PC. {Usenet FAQ (ftp://rtfm.mit.edu/pub/usenet/news.answers/acorn/)}. {Archive site list (http://cs.vu.nl/~gerben/acorn/acorn-archives.txt)}. HENSA archive (ftp://micros.hensa.ac.uk/). {Stuttgart archive (ftp://ftp.uni-stuttgart.de/pub/systems/acorn)}. See also Crisis Software, Warm Silence Software. (1998-04-03) archimedes (jargon) Archimedes The world's first RISC microcomputer, available only in the British Commonwealth and europe. Built in 1987 in Great Britain by Acorn Computers, it was legendary for its use of the ARM-2 microprocessor as a CPU. Many a novice hacker in the Commonwealth first learnt his or her skills on the Archimedes, since it was specifically designed for use in schools and educational institutions. Owners of Archimedes machines are often still treated with awe and reverence. Familiarly, “archi”.

podobné slovo definícia archimedes (encz) Archimedes,řecký matematik Zdeněk Brož law of archimedes (encz) law of Archimedes, n: Archimedes screw (gcide) Screw \Screw\ (skr[udd]), n. [OE. scrue, OF. escroue, escroe, female screw, F. ['e]crou, L. scrobis a ditch, trench, in LL., the hole made by swine in rooting; cf. D. schroef a screw, G. schraube, Icel. skr[=u]fa.] 1. A cylinder, or a cylindrical perforation, having a continuous rib, called the thread, winding round it spirally at a constant inclination, so as to leave a continuous spiral groove between one turn and the next, -- used chiefly for producing, when revolved, motion or pressure in the direction of its axis, by the sliding of the threads of the cylinder in the grooves between the threads of the perforation adapted to it, the former being distinguished as the external, or male screw, or, more usually the screw; the latter as the internal, or female screw, or, more usually, the nut. [1913 Webster] Note: The screw, as a mechanical power, is a modification of the inclined plane, and may be regarded as a right-angled triangle wrapped round a cylinder, the hypotenuse of the marking the spiral thread of the screw, its base equaling the circumference of the cylinder, and its height the pitch of the thread. [1913 Webster] 2. Specifically, a kind of nail with a spiral thread and a head with a nick to receive the end of the screw-driver. Screws are much used to hold together pieces of wood or to fasten something; -- called also wood screws, and {screw nails}. See also Screw bolt, below. [1913 Webster] 3. Anything shaped or acting like a screw; esp., a form of wheel for propelling steam vessels. It is placed at the stern, and furnished with blades having helicoidal surfaces to act against the water in the manner of a screw. See Screw propeller, below. [1913 Webster] 4. A steam vesel propelled by a screw instead of wheels; a screw steamer; a propeller. [1913 Webster] 5. An extortioner; a sharp bargainer; a skinflint; a niggard. --Thackeray. [1913 Webster] 6. An instructor who examines with great or unnecessary severity; also, a searching or strict examination of a student by an instructor. [Cant, American Colleges] [1913 Webster] 7. A small packet of tobacco. [Slang] --Mayhew. [1913 Webster] 8. An unsound or worn-out horse, useful as a hack, and commonly of good appearance. --Ld. Lytton. [1913 Webster] 9. (Math.) A straight line in space with which a definite linear magnitude termed the pitch is associated (cf. 5th Pitch, 10 (b) ). It is used to express the displacement of a rigid body, which may always be made to consist of a rotation about an axis combined with a translation parallel to that axis. [1913 Webster] 10. (Zool.) An amphipod crustacean; as, the skeleton screw (Caprella). See Sand screw, under Sand. [1913 Webster] Archimedes screw, Compound screw, Foot screw, etc. See under Archimedes, Compound, Foot, etc. A screw loose, something out of order, so that work is not done smoothly; as, there is a screw loose somewhere. --H. Martineau. Endless screw, or perpetual screw, a screw used to give motion to a toothed wheel by the action of its threads between the teeth of the wheel; -- called also a worm. Lag screw. See under Lag. Micrometer screw, a screw with fine threads, used for the measurement of very small spaces. Right and left screw, a screw having threads upon the opposite ends which wind in opposite directions. Screw alley. See Shaft alley, under Shaft. Screw bean. (Bot.) (a) The curious spirally coiled pod of a leguminous tree (Prosopis pubescens) growing from Texas to California. It is used for fodder, and ground into meal by the Indians. (b) The tree itself. Its heavy hard wood is used for fuel, for fencing, and for railroad ties. Screw bolt, a bolt having a screw thread on its shank, in distinction from a key bolt. See 1st Bolt, 3. Screw box, a device, resembling a die, for cutting the thread on a wooden screw. Screw dock. See under Dock. Screw engine, a marine engine for driving a screw propeller. Screw gear. See Spiral gear, under Spiral. Screw jack. Same as Jackscrew. Screw key, a wrench for turning a screw or nut; a spanner wrench. Screw machine. (a) One of a series of machines employed in the manufacture of wood screws. (b) A machine tool resembling a lathe, having a number of cutting tools that can be caused to act on the work successively, for making screws and other turned pieces from metal rods. Screw pine (Bot.), any plant of the endogenous genus Pandanus, of which there are about fifty species, natives of tropical lands from Africa to Polynesia; -- named from the spiral arrangement of the pineapple-like leaves. Screw plate, a device for cutting threads on small screws, consisting of a thin steel plate having a series of perforations with internal screws forming dies. Screw press, a press in which pressure is exerted by means of a screw. Screw propeller, a screw or spiral bladed wheel, used in the propulsion of steam vessels; also, a steam vessel propelled by a screw. Screw shell (Zool.), a long, slender, spiral gastropod shell, especially of the genus Turritella and allied genera. See Turritella. Screw steamer, a steamship propelled by a screw. Screw thread, the spiral rib which forms a screw. Screw stone (Paleon.), the fossil stem of an encrinite. Screw tree (Bot.), any plant of the genus Helicteres, consisting of about thirty species of tropical shrubs, with simple leaves and spirally twisted, five-celled capsules; -- also called twisted-horn, and twisty. Screw valve, a stop valve which is opened or closed by a screw. Screw worm (Zool.), the larva of an American fly (Compsomyia macellaria), allied to the blowflies, which sometimes deposits its eggs in the nostrils, or about wounds, in man and other animals, with fatal results. Screw wrench. (a) A wrench for turning a screw. (b) A wrench with an adjustable jaw that is moved by a screw. To put the screws on or To put the screw on, to use pressure upon, as for the purpose of extortion; to coerce. To put under the screw or To put under the screws, to subject to pressure; to force. Wood screw, a metal screw with a sharp thread of coarse pitch, adapted to holding fast in wood. See Illust. of Wood screw, under Wood. [1913 Webster]Archimedean \Ar`chi*me*de"an\, a. [L. Archimedeus.] Of or pertaining to Archimedes, a celebrated Greek philosopher; constructed on the principle of Archimedes' screw; as, Archimedean drill, propeller, etc. [1913 Webster] Archimedean screw, or Archimedes' screw, an instrument, said to have been invented by Archimedes, for raising water, formed by winding a flexible tube round a cylinder in the form of a screw. When the screw is placed in an inclined position, and the lower end immersed in water, by causing the screw to revolve, the water is raised to the upper end. --Francis. [1913 Webster]