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21 синхротрон
bevatron, synchrotron* * *синхротро́н м.
synchrotronдвухпу́тный синхротро́н — two-way synchrotronпрото́нный синхротро́н — proton synchrotron, synchrophasotronсинхротро́н с жё́сткой фокусиро́вкой — strong-focusing synchrotronсинхротро́н со сла́бой фокусиро́вкой — weak-focusing synchrotronэлектро́нный синхротро́н — electron synchrotron* * * -
22 ускоритель
accelerant, accelerator, acceleration installation* * *ускори́тель м.
acceleratorускори́тель взлё́та ав. — assisted take-off unitускори́тель взлё́та, раке́тный — rocket assisted take-off [RATO] unitускори́тель взлё́та, реакти́вный — jet assisted take-off [JATO] unitускори́тель вулканиза́ции — vulcanization acceleratorвысокоакти́вный ускори́тель пласт. — rapid acceleratorускори́тель заме́дленного де́йствия — delayed action acceleratorускори́тель заря́женных части́ц — charged-particle acceleratorускори́тель заря́женных части́ц, высоково́льтный — high-voltage acceleratorускори́тель заря́женных части́ц, и́мпульсный — pulsed acceleratorускори́тель заря́женных части́ц, индукцио́нный — induction accelerator, betatronускори́тель заря́женных части́ц, лине́йный — linear acceleratorускори́тель заря́женных части́ц на высо́кие эне́ргии — high-energy acceleratorускори́тель заря́женных части́ц, резона́нсный — resonant acceleratorускори́тель заря́женных части́ц с жё́сткой [си́льной] фокусиро́вкой — strong-focusing acceleratorускори́тель заря́женных части́ц со встре́чными пучка́ми — double clashing-beam acceleratorускори́тель заря́женных части́ц со сла́бой фокусиро́вкой — weak-focusing acceleratorускори́тель заря́женных части́ц с переме́нно-градие́нтной фокусиро́вкой — alternating-gradient acceleratorускори́тель заря́женных части́ц, цикли́ческий — cyclic (orbit) acceleratorускори́тель заря́женных части́ц, электро́нный — electron acceleratorускори́тель заря́женных части́ц, электростати́ческий — constant-potential [electrostatic] acceleratorускори́тель ката́лиза — promoter, catalysis acceleratorмалоакти́вный ускори́тель пласт. — slow-acting acceleratorоргани́ческий ускори́тель — organic acceleratorпла́зменный ускори́тель — plasma acceleratorускори́тель прото́нов — proton acceleratorраке́тный ускори́тель — rocket booster, accelerating rocket (engine); boost motorускори́тель схва́тывания ( бетона) — setting accelerator -
23 ускоритель
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24 синхротрон со слабой фокусировкой
Engineering: weak-focusing synchrotron, weak-focussing synchrotronУниверсальный русско-английский словарь > синхротрон со слабой фокусировкой
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25 мягкая фокусировка
Physics: weak focusingУниверсальный русско-английский словарь > мягкая фокусировка
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26 слабофокусирующий
Aviation: weak-focusing -
27 ускоритель заряженных частиц со слабой фокусировкой
Makarov: weak-focusing acceleratorУниверсальный русско-английский словарь > ускоритель заряженных частиц со слабой фокусировкой
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28 синхрофазотрон
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29 слабая самофокусировка
Русско-английский физический словарь > слабая самофокусировка
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30 point
point [pwɛ̃]━━━━━━━━━2. compounds━━━━━━━━━1. <a. pointb. ( = endroit) place ; (Astronomy, mathematics) pointc. ( = position) (Aviation, nautical) position• et maintenant, le point sur la grève des transports and now, the latest on the transport striked. ( = marque) (Mus, morse, sur i) dot ; ( = ponctuation) full stop (Brit), period (US) ; ( = petite tache) spot• tu n'iras pas, un point c'est tout you're not going and that's all there is to ite. (sur devoir) markf. [de couture, tricot] stitch• faire le point de la situation ( = examiner) to take stock of the situation ; ( = faire un compte rendu) to sum up the situation► à point [fruit] just ripe ; [fromage] just right for eating ; [viande] medium• le rôti est cuit à point the roast is done to a turn► à point (nommé) [arriver, venir] just at the right moment• est-il possible d'être bête à ce point ! how stupid can you get? (inf)• elles se ressemblent à tel point or à ce point qu'on pourrait les confondre they look so alike that you could easily mistake one for the other► au point [photo] in focus ; [affaire] completely settled ; [technique, machine] perfected• ce n'est pas encore au point it isn't quite up to scratch yet► au point de + infinitif so much that• il aimait le Québec au point d'y passer toutes ses vacances he loved Quebec so much that he spent all his holidays there• il se détestent au point qu'ils ne se parlent plus they hate each other so much that they've stopped speaking► au point où• en être arrivé au point où... to have reached the point where...• on continue ? -- au point où on en est ! shall we go on? -- we've got this far so we might as well!► au plus haut point [détester, admirer] intensely• se méfier au plus haut point de qch to be highly sceptical about sth► mettre au point [+ photo, caméra] to focus ; [+ stratégie, technique] to perfect ; [+ médicament, invention, système] to develop ; [+ projet] to finalize• mettre une affaire au point avec qn to finalize all the details of a matter with sb► mise au point [d'appareil photo, caméra] focusing ; [de stratégie, technique] perfecting ; [de médicament, invention, système] development ; [de moteur] tuning ; [d'affaire, projet] finalizing ; ( = explication, correction) clarification• publier une mise au point to issue a statement (setting the record straight)► en tout point, en tous points in every respect2. <• vous avez un point de chute à Rome ? do you have somewhere to stay in Rome? ► point commun• nous voilà revenus au point de départ so we're back to square one (inf) ► point de distribution [d'eau] supply point ; (Business) distribution outlet• mettre un point d'honneur à faire qch to make it a point of honour to do sth ► point d'interrogation question mark• au point mort [voiture] in neutral ; [de négociations, affaires] at a standstill ► point mousse garter stitch► points de retraite points based on social security contributions that count towards one's pension• quel est votre point de vue sur ce sujet ? what's your point of view on this matter?* * *pwɛ̃
1.
nom masculin1) ( endroit) point2) ( situation) point; Nautisme positionêtre sur le point de faire — to be just about to do, to be on the point of doing
j'en suis toujours au même point (qu'hier/qu'il y a un an) — I'm still exactly where I was (yesterday/last year)
au point où j'en suis, ça n'a pas d'importance! — I've reached the point where it doesn't matter any more!
faire le point — Nautisme to take bearings; fig to take stock of the situation
3) ( degré)‘j'en aurais pleuré’ - ‘ah bon, à ce point?’ — ‘I could have cried’ - ‘really? it was that bad?’
il est têtu à un point! — (colloq) he's so incredibly stubborn!
jusqu'à un certain point — up to a (certain) point, to a certain extent
4) ( question particulière) point; ( dans un ordre du jour) item, pointen tout point, en tous points — in every respect ou way
5) ( marque visible) dot6) Jeux, Sport pointmarquer/perdre des points — lit, fig to score/to lose points
7) ( pour évaluer) mark GB, point USavoir sept points d'avance/de retard — to be seven marks ahead/behind
obtenir or avoir 27 points sur 40 — to get 27 out of 40
être un mauvais point pour quelqu'un/quelque chose — to be a black mark against somebody/something
8) ( dans un système de calcul) pointle permis à points — system whereby driving offender gets penalty points
9) Mathématique point10) Linguistique ( en ponctuation) full stop GB, period USpoint à la ligne — ( dans une dictée) full stop, new paragraph
point final — ( dans une dictée) full stop
mettre un point final à quelque chose — fig to put a stop ou an end to something
je n'irai pas, point final! — (colloq) I'm not going, full stop GB ou period US!
tu vas te coucher un point c'est tout! — (colloq) you're going to bed and that's final!
11) Musique dot12) ( en typographie) point14) (en couture, tricot) stitch
2.
(dated) adverbe not
3.
à point locution adverbiale1) ( en temps voulu) just in time2) Culinaire
4.
au point locutionêtre au point — [système, machine] to be well designed; [spectacle] to be well put together
mettre au point — ( élaborer) to perfect [système]; to work out, to devise [accord, plan]; to develop [vaccin, appareil]; ( régler) to adjust
mise au point — ( de système) perfecting; ( de vaccin) development; ( réglage) adjusting; Photographie focus; fig ( déclaration) clarifying statement
faire la mise au point — Photographie to focus
faire une mise au point — fig to set the record straight ( sur about)
Phrasal Verbs:••* * *pwɛ̃1. nm1) (= marque, signe) dot2) [ponctuation] full stop Grande-Bretagne period USA3) (= moment) pointNous en sommes au même point. — We have reached the same point.
J'étais sur le point de te téléphoner. — I was just about to phone you.
4) (= degré)à ce point abîmé que... — so damaged that...
au point que; à tel point que — so much so that
5) (au score) point6) (= aspect) pointJe ne suis pas d'accord sur ce point. — I don't agree on this point.
7) (= endroit) spot, point, (en géométrie) point8) COUTURE, TRICOT stitchpoint mousse — garter stitch, plain
9) CUISINE"Comment voulez-vous votre steak?" — "À point." — "How would you like your steak?" — "Medium."
faire le point NAVIGATION — to take a bearing, figto take stock
faire le point sur — to review, to take stock of
mettre au point [mécanisme, procédé] — to develop, [appareil-photo] to focus
2. advlit (= pas) notpoint n'est besoin de... — there is no need to...
point de... — no...
3. vbSee:* * *A nm1 ( endroit) point; un point précis du globe/sur une carte a particular point on the earth/on a map; un point de ravitaillement/ralliement a staging/rallying point; un point de rencontre a meeting point; point de vente (sales) outlet; serrure 3 points 3 point lock;2 ( situation) point; Naut position; être sur le point de faire to be just about to do, to be on the point of doing; j'étais sur le point de leur dire/d'abandonner/de partir I was just about to tell them/to give up/to leave, I was on the point of telling them/giving up/leaving; j'en suis toujours au même point (qu'hier/qu'il y a un an) I'm still exactly where I was (yesterday/last year); au point où j'en suis, ça n'a pas d'importance! I've reached the point where it doesn't matter any more!; il en est au point où il allume une cigarette en se levant he's got GB ou gotten US to the stage ou point where he lights a cigarette as soon as he gets up; faire le point Naut to take bearings; fig to take stock of the situation; faire le point sur la situation économique/sur la recherche scientifique fig to take stock of the economic situation/of scientific research; faire le point sur la circulation (routière)/l'actualité to give an up-to-the-minute report on the traffic news/current situation;3 ( degré) il m'agace/m'inquiète au plus haut point he annoys me/worries me intensely; la circulation était à ce point bloquée que j'ai dû laisser ma voiture au bord de la route the traffic was so bad that I had to leave my car on the side of the road; je ne le pensais pas bête/coléreux à ce point I didn't think he was that stupid/quick-tempered; ‘j'en aurais pleuré’-‘ah bon, à ce point?’ ‘I could have cried’-‘really? it was that bad?’; je sais à quel point elle est triste/sensible I know how sad/sensitive she is; si tu savais à quel point il m'agace! if you only knew how much he annoys me!; au point que to the extent that; à tel point que to such an extent that…; douloureux/endommagé à (un) tel or au point que so painful/badly damaged that; la situation s'est aggravée au point qu'ils ont dû appeler la police the situation became so bad that the police had to be called in; le temps s'est rafraîchi au point qu'il a fallu remettre le chauffage the weather got so cold that the heating had to be put back on; il est têtu à un point! he's so incredibly stubborn!; jusqu'à un certain point up to a (certain) point, to a certain extent;4 ( question particulière) point; ( dans un ordre du jour) item, point; un programme en trois points a three-point plan; un point fondamental/de détail (d'un texte) a basic/minor point (in a text); sur ce point on this point; j'aimerais revenir sur ce dernier point I would like to come back to that last point; un point de désaccord/litige a point of disagreement/contention; reprendre un texte point par point to go over a text point by point; en tout point, en tous points in every respect ou way; une politique en tous points désastreuse a policy that is disastrous in every respect; les deux modèles sont semblables en tous points the two models are alike in every respect;5 ( marque visible) gén dot; les villes sont marquées par un point towns are marked by a dot; il y a un point sur le i et le j there's a dot on the i and the j; un point lumineux/rouge dans le lointain a light/a red dot in the distance; bientôt, le navire ne fut qu'un point à l'horizon soon, the ship was a mere dot ou speck on the horizon; un point de colle a spot of glue; un point de rouille a speck of rust; points de graissage lubricating points; ⇒ i;6 Jeux, Sport point; marquer/perdre des points lit, fig to score/lose points; compter les points to keep (the) score; un point partout! one all!; battre son adversaire aux points to beat one's opponent on points; remporter une victoire aux points to win on points;7 ( pour évaluer) mark GB, point US; avoir sept points d'avance to be seven marks ahead; avoir dix points de retard to be ten marks behind; il m'a manqué trois points pour réussir I failed by three marks; enlever un point par faute to take a mark off for each mistake; obtenir or avoir 27 points sur 40 to get 27 out of 40; être un bon point pour to be a plus point for; être un mauvais point pour qn/qch to be a black mark against sb/sth;8 ( dans un système de calcul) point; la livre a perdu trois points the pound lost three points; le taux de chômage a augmenté de 0,8 points the unemployment rate rose by 0.8 points; le permis à points system whereby driving offender gets penalty points; il a perdu sept points dans les sondages he's gone down seven points in the polls;9 Math point; point d'intersection/d'inflexion point of intersection/of inflection;10 Ling ( en ponctuation) full stop GB, period US; mettre un point to put a full stop; point à la ligne ( dans une dictée) full stop, new paragraph; point final ( dans une dictée) full stop; mettre un point final à qch fig to put a stop ou an end to sth; je n'irai pas, point final○! I'm not going, full stop GB ou period US!; tu vas te coucher un point c'est tout○! you're going to bed and that's final!;11 Mus dot;12 Imprim point;13 Méd ( douleur) pain; avoir un point à la poitrine/à l'aine to have a pain in the chest/in the groin;14 (en couture, tricot) stitch; faire un point à qch to put a few stitches in sth; dentelle au point de Venise Venetian lace.B †adv not; tu ne tueras point Bible thou shalt not kill; je n'en ai point I don't have any; ‘tu es fâché?’-‘non point!’ ‘are you angry?’-‘not at all’.C à point loc adv venir/arriver à point to come/arrive just in time; venir/arriver or tomber à point nommé to come/arrive just at the right moment; faire cuire à point to cook [sth] medium rare [viande]; bifteck (cuit) à point medium rare steak; le camembert est à point the camembert is ready to eat.D au point loc adv, loc adj être au point [système, méthode, machine] to be well designed; [spectacle, émission] to be well put together; leur système/machine/spectacle n'est pas encore très au point their system/machine/show still needs some working on; le nouveau modèle est très au point the new model is very well designed; le spectacle n'était pas du tout au point the show wasn't up to scratch; le prototype n'est pas encore au point the prototype isn't quite ready yet; ça fait des semaines qu'ils répètent mais leur numéro n'est pas encore au point they've been rehearsing for weeks but they still haven't got GB ou gotten US it quite right; je ne suis pas au point pour les examens I'm not ready for the exams; mettre [qch] au point ( inventer) to perfect [théorie, système, méthode, technique]; to work out, to devise [accord, plan de paix, stratégie]; to develop [vaccin, médicament, appareil]; ( régler) to adjust [machine, mécanisme]; il leur reste deux semaines pour finir de mettre leur spectacle au point they've got two more weeks to put the finishing touches to their show; mettre au point sur qch Phot to focus on sth; mise au point Phot focus; fig ( déclaration) clarifying statement; la mise au point est automatique sur mon appareil my camera has automatic focus; faire la mise au point Phot to focus (sur on); faire une mise au point fig to set the record straight (sur about); mise au point ( invention) (de théorie, système, méthode, technique) perfecting; (de médicament, vaccin) development; ( réglage) (de machine, mécanisme) adjusting; Phot focus.point d'acupuncture Méd acupuncture point; point d'ancrage Aut anchor; fig base; point d'appui Mil base of operations; Phys fulcrum; gén support; les piliers servent de point d'appui à la charpente the roof structure is supported by the pillars; trouver un point d'appui à une échelle to find a support for a ladder; point arrière Cout back stitch; point d'attache base; point de bâti Cout tacking stitch; point blanc whitehead; point de blé ( en tricot) double moss stitch; point de boutonnière Cout buttonhole stitch; point cardinal Phys, Géog compass ou cardinal point; point de chaînette ( en broderie) chain stitch; point de chausson ( en broderie) herringbone stitch; point chaud trouble ou hot spot; les points chauds du globe the world's trouble spots; point de chute fig port of call; point commun mutual interest; nous avons beaucoup de points communs we have a lot in common; ils n'ont aucun point commun they have nothing in common; point de congestion† Méd slight congestion of the lung; point de côtes ( en tricot) rib; point de côté ( douleur) stitch; ( en couture) slip stitch; avoir un point de côté to have a stitch in one's side; point de croix ( en broderie) cross stitch; point de départ lit, fig starting point; nous revoilà à notre point de départ fig we're back to square one; point de devant Cout running stitch; point d'eau ( naturel) watering place; ( robinet) water tap GB ou faucet US; point d'ébullition boiling point; point d'épine ( en broderie) featherstitch; point d'exclamation Ling exclamation mark; point faible weak point; point de feston ( en broderie) blanket stitch; point fort strong point; point de fuite Art, Archit vanishing point; point de fusion melting point; point G G-spot; point d'interrogation Ling question mark; point de jersey ( en tricot) stocking stitch; point du jour daybreak; au point du jour at daybreak; point de liquéfaction liquefaction point; point de mire Mil target; fig focal point; point mousse ( en tricot) garter stitch; point mort Aut neutral; se mettre or passer/être au point mort Aut to put the car into/to be in neutral; être au point mort fig [affaires, consommation] to be at a standstill; [négociations] to be in a state of deadlock; point noir ( comédon) blackhead; ( problème) problem; ( sur la route) blackspot; l'inflation reste le seul point noir inflation is the only problem; point de non-retour point of no return; point d'orgue Mus pause sign; fig culmination; point d'ourlet Cout hemstitch; point de penalty penalty spot; point de piqûre Cout back stitch; point de presse Journ press briefing; point de repère ( spatial) landmark; (temporel, personnel) point of reference; point de reprise Cout darning stitch; point de retraite Prot Soc point which counts towards a retirement pension scheme; point de riz ( en tricot) moss stitch; point de surfil Cout whipstitch; point de suture Méd stitch; point de tige ( en broderie) stem stitch; point de torsade ( en tricot) cable stitch; point de vue ( paysage) viewpoint; ( opinion) point of view; du point de vue de la direction from the management's point of view; du point de vue de l'efficacité/du sens as far as efficiency/meaning is concerned; d'un point de vue économique c'est rentable/intéressant from a financial point of view it's profitable/attractive; points de suspension suspension points.être mal en point to be in a bad way.I[pwɛ̃] adverbe1. [en corrélation avec 'ne']2. [employé seul]du vin il y en avait, mais de champagne point there was wine, but no champagne ou not a drop of champagneil eut beau chercher, point de John he searched in vain, John was nowhere to be foundpoint de démocratie sans liberté de critiquer (there can be) no democracy without the freedom to criticize3. [en réponse négative]point du tout! not at all!, not in the least!II[pwɛ̃] nom masculinpoint lumineux spot ou point of lightpoint de rouille speck ou spot of rustun point de soudure a spot ou blob of solder3. [symbole graphique - en fin de phrase] full stop (UK), period (US) ; [ - sur un i ou un j] dot ; [ - en morse, en musique] dotj'ai dit non, point final ou un point c'est tout! (figuré) I said no and that's that ou that's final ou there's an end to it!mettre un point final à une discussion to terminate a discussion, to bring a discussion to an endpoint estimé/observé estimated/observed positiona. NAUTIQUE to take a bearing, to plot one's positionà 40 ans, on s'arrête et on fait le point when you reach 40, you stand back and take stock of your lifeet maintenant, le point sur la circulation and now, the latest traffic newspoint d'intersection/de tangence intersection/tangential pointen plusieurs points de la planète in different places ou spots on the planet9. [degré] point10. [élément - d'un texte, d'une théorie] point ; [ - d'un raisonnement] point, item ; [ - d'une description] feature, traitvoici un point d'histoire que je souhaiterais éclaircir I'd like to make clear what happened at that particular point in historypoint d'entente/de désaccord point of agreement/of disagreement11. [unité de valeur - dans un sondage, à la Bourse] point ; [ - de retraite] unit ; [ - du salaire de base] (grading) pointsa cote de popularité a gagné/perdu trois points his popularity rating has gone up/down by three pointsbattu aux points [en boxe] beaten on pointsfaire le point [le gagner] to win the pointb. [appréciation] mark (for good behaviour)12. COUTUREfaire un point à to put a stitch ou a few stitches inpoint de couture/crochet/tricot sewing/crochet/knitting stitch13. INFORMATIQUE [unité graphique] dot[emplacement]point d'accès/de retour entry/reentry point————————à ce point, à un tel point locution adverbialeton travail est dur à ce point? is your job so (very) ou that hard?j'en ai tellement assez que je vais démissionner — à ce point? I'm so fed up that I'm going to resign — that bad, is it?————————à ce point que, à (un) tel point que locution conjonctiveso much so that, to such a point thatles choses en étaient arrivées à un tel point que... things had reached such a pitch that...elle est déprimée, à ce point qu'elle ne veut plus voir personne she's so depressed that she won't see anyone anymore————————à point locution adjectivale[steak] medium[rôti] done to a turn[poire] just ou nicely ripeton bonhomme est à point, tu n'as plus qu'à enregistrer ses aveux (familier & figuré) your man's nice and ready now, all you've got to do is get the confession down on tape————————à point locution adverbiale1. CUISINE2. [au bon moment]a. [personne] to come (just) at the right timeb. [arrivée, décision] to be very timely————————à point nommé locution adverbialearriver à point nommé to arrive (just) at the right moment ou when needed, to arrive in the nick of timeau plus haut point locution adverbialeje le déteste au plus haut point I can't tell you how much I hate him, I absolutely loathe him————————au point locution adjectivale[moteur] tuned[machine] in perfect running order[technique] perfected[discours, plaidoyer] finalized[spectacle, artiste] readyton revers n'est pas encore au point your backhand isn't good enough ou up to scratch yetle son/l'image n'est pas au point the sound/the image isn't right————————au point locution adverbialea. [texte à imprimer] to editb. [discours, projet, rapport] to finalize, to put the finishing touches toc. [spectacle] to perfectd. [moteur] to tunee. [appareil photo] to (bring into) focusmettre les choses au point to put ou set the record straightmettons les choses au point: je refuse de travailler le dimanche let's get this ou things straight: I refuse to work Sundaysaprès cette discussion, j'ai tenu à mettre les choses au point following that discussion, I insisted on putting ou setting the record straight————————au point de locution prépositionnelle————————au point du jour locution adverbiale(littéraire) at dawn ou daybreakau point où locution conjonctivenous sommes arrivés au point où... we've reached the point ou stage where...au point où j'en suis, autant que je continue having got this far, I might as well carry onau point où en sont les choses as things stand, the way things are (now)————————au point que locution conjonctiveso much that, so... thatil était très effrayé, au point qu'il a essayé de se sauver he was so frightened that he tried to run awaypoint par point locution adverbialesur le point de locution prépositionnelleêtre sur le point de faire quelque chose to be about to do ou on the point of doing ou on the verge of doing somethingj'étais sur le point de partir I was about to ou going to leavesur le point de pleurer on the verge of tears ou of crying————————point d'ancrage nom masculin————————point d'appui nom masculin1. [d'un levier] fulcrumpoint de chute nom masculin2. (figuré)————————point culminant nom masculinquel est le point culminant des Alpes? what is the highest point ou peak in the Alps?point de départ nom masculin————————point faible nom masculinson point faible, c'est sa susceptibilité his touchiness is his weak spot ou point————————point fort nom masculin[d'une personne, d'une entreprise] strong point[d'un joueur de tennis] best shotles maths n'ont jamais été mon point fort I was never any good at maths, maths was never my strong point————————point mort nom masculin————————point noir nom masculina. [encombré] a heavily congested areab. [dangereux] an accident blackspot————————point sensible nom masculin1. [endroit douloureux] tender ou sore spot2. MILITAIRE key ou strategic target3. (figuré)a. [chez quelqu'un] to touch on a sore spotb. [dans un problème] to touch on a sensitive area -
31 Artificial Intelligence
In my opinion, none of [these programs] does even remote justice to the complexity of human mental processes. Unlike men, "artificially intelligent" programs tend to be single minded, undistractable, and unemotional. (Neisser, 1967, p. 9)Future progress in [artificial intelligence] will depend on the development of both practical and theoretical knowledge.... As regards theoretical knowledge, some have sought a unified theory of artificial intelligence. My view is that artificial intelligence is (or soon will be) an engineering discipline since its primary goal is to build things. (Nilsson, 1971, pp. vii-viii)Most workers in AI [artificial intelligence] research and in related fields confess to a pronounced feeling of disappointment in what has been achieved in the last 25 years. Workers entered the field around 1950, and even around 1960, with high hopes that are very far from being realized in 1972. In no part of the field have the discoveries made so far produced the major impact that was then promised.... In the meantime, claims and predictions regarding the potential results of AI research had been publicized which went even farther than the expectations of the majority of workers in the field, whose embarrassments have been added to by the lamentable failure of such inflated predictions....When able and respected scientists write in letters to the present author that AI, the major goal of computing science, represents "another step in the general process of evolution"; that possibilities in the 1980s include an all-purpose intelligence on a human-scale knowledge base; that awe-inspiring possibilities suggest themselves based on machine intelligence exceeding human intelligence by the year 2000 [one has the right to be skeptical]. (Lighthill, 1972, p. 17)4) Just as Astronomy Succeeded Astrology, the Discovery of Intellectual Processes in Machines Should Lead to a Science, EventuallyJust as astronomy succeeded astrology, following Kepler's discovery of planetary regularities, the discoveries of these many principles in empirical explorations on intellectual processes in machines should lead to a science, eventually. (Minsky & Papert, 1973, p. 11)5) Problems in Machine Intelligence Arise Because Things Obvious to Any Person Are Not Represented in the ProgramMany problems arise in experiments on machine intelligence because things obvious to any person are not represented in any program. One can pull with a string, but one cannot push with one.... Simple facts like these caused serious problems when Charniak attempted to extend Bobrow's "Student" program to more realistic applications, and they have not been faced up to until now. (Minsky & Papert, 1973, p. 77)What do we mean by [a symbolic] "description"? We do not mean to suggest that our descriptions must be made of strings of ordinary language words (although they might be). The simplest kind of description is a structure in which some features of a situation are represented by single ("primitive") symbols, and relations between those features are represented by other symbols-or by other features of the way the description is put together. (Minsky & Papert, 1973, p. 11)[AI is] the use of computer programs and programming techniques to cast light on the principles of intelligence in general and human thought in particular. (Boden, 1977, p. 5)The word you look for and hardly ever see in the early AI literature is the word knowledge. They didn't believe you have to know anything, you could always rework it all.... In fact 1967 is the turning point in my mind when there was enough feeling that the old ideas of general principles had to go.... I came up with an argument for what I called the primacy of expertise, and at the time I called the other guys the generalists. (Moses, quoted in McCorduck, 1979, pp. 228-229)9) Artificial Intelligence Is Psychology in a Particularly Pure and Abstract FormThe basic idea of cognitive science is that intelligent beings are semantic engines-in other words, automatic formal systems with interpretations under which they consistently make sense. We can now see why this includes psychology and artificial intelligence on a more or less equal footing: people and intelligent computers (if and when there are any) turn out to be merely different manifestations of the same underlying phenomenon. Moreover, with universal hardware, any semantic engine can in principle be formally imitated by a computer if only the right program can be found. And that will guarantee semantic imitation as well, since (given the appropriate formal behavior) the semantics is "taking care of itself" anyway. Thus we also see why, from this perspective, artificial intelligence can be regarded as psychology in a particularly pure and abstract form. The same fundamental structures are under investigation, but in AI, all the relevant parameters are under direct experimental control (in the programming), without any messy physiology or ethics to get in the way. (Haugeland, 1981b, p. 31)There are many different kinds of reasoning one might imagine:Formal reasoning involves the syntactic manipulation of data structures to deduce new ones following prespecified rules of inference. Mathematical logic is the archetypical formal representation. Procedural reasoning uses simulation to answer questions and solve problems. When we use a program to answer What is the sum of 3 and 4? it uses, or "runs," a procedural model of arithmetic. Reasoning by analogy seems to be a very natural mode of thought for humans but, so far, difficult to accomplish in AI programs. The idea is that when you ask the question Can robins fly? the system might reason that "robins are like sparrows, and I know that sparrows can fly, so robins probably can fly."Generalization and abstraction are also natural reasoning process for humans that are difficult to pin down well enough to implement in a program. If one knows that Robins have wings, that Sparrows have wings, and that Blue jays have wings, eventually one will believe that All birds have wings. This capability may be at the core of most human learning, but it has not yet become a useful technique in AI.... Meta- level reasoning is demonstrated by the way one answers the question What is Paul Newman's telephone number? You might reason that "if I knew Paul Newman's number, I would know that I knew it, because it is a notable fact." This involves using "knowledge about what you know," in particular, about the extent of your knowledge and about the importance of certain facts. Recent research in psychology and AI indicates that meta-level reasoning may play a central role in human cognitive processing. (Barr & Feigenbaum, 1981, pp. 146-147)Suffice it to say that programs already exist that can do things-or, at the very least, appear to be beginning to do things-which ill-informed critics have asserted a priori to be impossible. Examples include: perceiving in a holistic as opposed to an atomistic way; using language creatively; translating sensibly from one language to another by way of a language-neutral semantic representation; planning acts in a broad and sketchy fashion, the details being decided only in execution; distinguishing between different species of emotional reaction according to the psychological context of the subject. (Boden, 1981, p. 33)Can the synthesis of Man and Machine ever be stable, or will the purely organic component become such a hindrance that it has to be discarded? If this eventually happens-and I have... good reasons for thinking that it must-we have nothing to regret and certainly nothing to fear. (Clarke, 1984, p. 243)The thesis of GOFAI... is not that the processes underlying intelligence can be described symbolically... but that they are symbolic. (Haugeland, 1985, p. 113)14) Artificial Intelligence Provides a Useful Approach to Psychological and Psychiatric Theory FormationIt is all very well formulating psychological and psychiatric theories verbally but, when using natural language (even technical jargon), it is difficult to recognise when a theory is complete; oversights are all too easily made, gaps too readily left. This is a point which is generally recognised to be true and it is for precisely this reason that the behavioural sciences attempt to follow the natural sciences in using "classical" mathematics as a more rigorous descriptive language. However, it is an unfortunate fact that, with a few notable exceptions, there has been a marked lack of success in this application. It is my belief that a different approach-a different mathematics-is needed, and that AI provides just this approach. (Hand, quoted in Hand, 1985, pp. 6-7)We might distinguish among four kinds of AI.Research of this kind involves building and programming computers to perform tasks which, to paraphrase Marvin Minsky, would require intelligence if they were done by us. Researchers in nonpsychological AI make no claims whatsoever about the psychological realism of their programs or the devices they build, that is, about whether or not computers perform tasks as humans do.Research here is guided by the view that the computer is a useful tool in the study of mind. In particular, we can write computer programs or build devices that simulate alleged psychological processes in humans and then test our predictions about how the alleged processes work. We can weave these programs and devices together with other programs and devices that simulate different alleged mental processes and thereby test the degree to which the AI system as a whole simulates human mentality. According to weak psychological AI, working with computer models is a way of refining and testing hypotheses about processes that are allegedly realized in human minds.... According to this view, our minds are computers and therefore can be duplicated by other computers. Sherry Turkle writes that the "real ambition is of mythic proportions, making a general purpose intelligence, a mind." (Turkle, 1984, p. 240) The authors of a major text announce that "the ultimate goal of AI research is to build a person or, more humbly, an animal." (Charniak & McDermott, 1985, p. 7)Research in this field, like strong psychological AI, takes seriously the functionalist view that mentality can be realized in many different types of physical devices. Suprapsychological AI, however, accuses strong psychological AI of being chauvinisticof being only interested in human intelligence! Suprapsychological AI claims to be interested in all the conceivable ways intelligence can be realized. (Flanagan, 1991, pp. 241-242)16) Determination of Relevance of Rules in Particular ContextsEven if the [rules] were stored in a context-free form the computer still couldn't use them. To do that the computer requires rules enabling it to draw on just those [ rules] which are relevant in each particular context. Determination of relevance will have to be based on further facts and rules, but the question will again arise as to which facts and rules are relevant for making each particular determination. One could always invoke further facts and rules to answer this question, but of course these must be only the relevant ones. And so it goes. It seems that AI workers will never be able to get started here unless they can settle the problem of relevance beforehand by cataloguing types of context and listing just those facts which are relevant in each. (Dreyfus & Dreyfus, 1986, p. 80)Perhaps the single most important idea to artificial intelligence is that there is no fundamental difference between form and content, that meaning can be captured in a set of symbols such as a semantic net. (G. Johnson, 1986, p. 250)Artificial intelligence is based on the assumption that the mind can be described as some kind of formal system manipulating symbols that stand for things in the world. Thus it doesn't matter what the brain is made of, or what it uses for tokens in the great game of thinking. Using an equivalent set of tokens and rules, we can do thinking with a digital computer, just as we can play chess using cups, salt and pepper shakers, knives, forks, and spoons. Using the right software, one system (the mind) can be mapped into the other (the computer). (G. Johnson, 1986, p. 250)19) A Statement of the Primary and Secondary Purposes of Artificial IntelligenceThe primary goal of Artificial Intelligence is to make machines smarter.The secondary goals of Artificial Intelligence are to understand what intelligence is (the Nobel laureate purpose) and to make machines more useful (the entrepreneurial purpose). (Winston, 1987, p. 1)The theoretical ideas of older branches of engineering are captured in the language of mathematics. We contend that mathematical logic provides the basis for theory in AI. Although many computer scientists already count logic as fundamental to computer science in general, we put forward an even stronger form of the logic-is-important argument....AI deals mainly with the problem of representing and using declarative (as opposed to procedural) knowledge. Declarative knowledge is the kind that is expressed as sentences, and AI needs a language in which to state these sentences. Because the languages in which this knowledge usually is originally captured (natural languages such as English) are not suitable for computer representations, some other language with the appropriate properties must be used. It turns out, we think, that the appropriate properties include at least those that have been uppermost in the minds of logicians in their development of logical languages such as the predicate calculus. Thus, we think that any language for expressing knowledge in AI systems must be at least as expressive as the first-order predicate calculus. (Genesereth & Nilsson, 1987, p. viii)21) Perceptual Structures Can Be Represented as Lists of Elementary PropositionsIn artificial intelligence studies, perceptual structures are represented as assemblages of description lists, the elementary components of which are propositions asserting that certain relations hold among elements. (Chase & Simon, 1988, p. 490)Artificial intelligence (AI) is sometimes defined as the study of how to build and/or program computers to enable them to do the sorts of things that minds can do. Some of these things are commonly regarded as requiring intelligence: offering a medical diagnosis and/or prescription, giving legal or scientific advice, proving theorems in logic or mathematics. Others are not, because they can be done by all normal adults irrespective of educational background (and sometimes by non-human animals too), and typically involve no conscious control: seeing things in sunlight and shadows, finding a path through cluttered terrain, fitting pegs into holes, speaking one's own native tongue, and using one's common sense. Because it covers AI research dealing with both these classes of mental capacity, this definition is preferable to one describing AI as making computers do "things that would require intelligence if done by people." However, it presupposes that computers could do what minds can do, that they might really diagnose, advise, infer, and understand. One could avoid this problematic assumption (and also side-step questions about whether computers do things in the same way as we do) by defining AI instead as "the development of computers whose observable performance has features which in humans we would attribute to mental processes." This bland characterization would be acceptable to some AI workers, especially amongst those focusing on the production of technological tools for commercial purposes. But many others would favour a more controversial definition, seeing AI as the science of intelligence in general-or, more accurately, as the intellectual core of cognitive science. As such, its goal is to provide a systematic theory that can explain (and perhaps enable us to replicate) both the general categories of intentionality and the diverse psychological capacities grounded in them. (Boden, 1990b, pp. 1-2)Because the ability to store data somewhat corresponds to what we call memory in human beings, and because the ability to follow logical procedures somewhat corresponds to what we call reasoning in human beings, many members of the cult have concluded that what computers do somewhat corresponds to what we call thinking. It is no great difficulty to persuade the general public of that conclusion since computers process data very fast in small spaces well below the level of visibility; they do not look like other machines when they are at work. They seem to be running along as smoothly and silently as the brain does when it remembers and reasons and thinks. On the other hand, those who design and build computers know exactly how the machines are working down in the hidden depths of their semiconductors. Computers can be taken apart, scrutinized, and put back together. Their activities can be tracked, analyzed, measured, and thus clearly understood-which is far from possible with the brain. This gives rise to the tempting assumption on the part of the builders and designers that computers can tell us something about brains, indeed, that the computer can serve as a model of the mind, which then comes to be seen as some manner of information processing machine, and possibly not as good at the job as the machine. (Roszak, 1994, pp. xiv-xv)The inner workings of the human mind are far more intricate than the most complicated systems of modern technology. Researchers in the field of artificial intelligence have been attempting to develop programs that will enable computers to display intelligent behavior. Although this field has been an active one for more than thirty-five years and has had many notable successes, AI researchers still do not know how to create a program that matches human intelligence. No existing program can recall facts, solve problems, reason, learn, and process language with human facility. This lack of success has occurred not because computers are inferior to human brains but rather because we do not yet know in sufficient detail how intelligence is organized in the brain. (Anderson, 1995, p. 2)Historical dictionary of quotations in cognitive science > Artificial Intelligence
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