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121 порождать
1. weakly generate2. derive3. bring forthпорождать; породить — bring to birth
4. proliferate5. spring6. bring to birth7. engender8. produce9. establish10. beget11. germinate12. induce13. induced14. spawned15. spawning16. cause; give rise to; entail17. generate18. originateСинонимический ряд:вызывать (глаг.) будить; возбуждать; воспламенять; вызывать; зажигать; зарождать; поднимать; пробуждать; рождать -
122 συμβάλλω
συμβάλλω, [tense] fut. - βᾰλῶ: [tense] aor. - έβᾰλον, inf. - βᾰλεῖν: [tense] pf. - βέβληκα: [tense] aor. 1 [voice] Pass. - εβλήθην:—of these tenses Hom. uses only [tense] pres. [voice] Act., [tense] aor. [voice] Act. and [voice] Med., but most commonly [dialect] Ep. intr. [tense] aor. forms συμβλήτην, -βλήμεναι, [voice] Med. σύμβλητο, -βληντο, -βλήμενος, subj. [ per.] 2sg. - βλήεαι prob. cj. for - βλήσεαι in Il.20.335, [ per.] 3sg. [var] contr.A- βληται Od.7.204
:—throw together, dash together, σύν ῥ' ἔβαλον ῥινούς, of men in close combat, Il.4.447, 8.61; , Ar. Pax 1274 (hex.), X.HG4.3.19, etc.; bring together, unite, e.g. of rivers that fall into one another, ; :— [voice] Med.,πολλοὶ ποταμοὶ σ. τὸ σφέτερον ὕδωρ Hdt.4.50
(cf. δάκρυα δάκρυσι ς. E.Or. 336 (lyr., [voice] Act.)); ὁ Ἀκεσίνης τῷ Ἰνδῷ τὸ ὕδωρ ς. Arr.An.6.1.5; σ. τὰ ὦτα πρὸς τὴν γῆν have their ears reaching to.., Arist.HA 606a15:—[voice] Pass., κατὰ τὰς ῥᾶγας συμβεβλημένων [τῶν δακτύλων] Sor. 2.60.4 intr. in [voice] Act., fit (cf.σύμβολον 1.1
), Arist.EE 1239b14; to be suitable,τὰ χεδροπὰ σ. εἰς τὰς νέας Thphr.CP3.20.7
(unless = sow, set).b to be profitable,σ. τῷ πολιτικῷ.. δικαίῳ εἶναι Phld.Rh.2.285
S.;σ. ἀναμένειν ἡμέραν μίαν Gal.16.496
.5 intr., come together, ἔνθα δίστομοι.. σ. ὁδοί where two roads join, S.OC 901, cf. Str.6.3.7; τὰ συμβάλλοντα the watersmeet, IG9(2) p.xi (Delph., iii/ii B.C.); [φλὲψ] σ. τῇ ἀποσχίσει Arist.HA 514a12
; collide,τοὺς τύπους ἀνάγκη συμβάλλειν ἑαυτοῖς Thphr.Sens.52
: Geom., meet, τὸ σημεῖον, καθ' ὃ συμβάλλουσιν the point in which (the straight lines) meet, Archim.Sph.Cyl.1.23, etc.6 βλέφαρα σ. ὕπνῳ close the eyes in sleep, A.Ag.15; σ. ὄμμα, in death, ib. 1294 (but ποῖον ὄμμα συμβαλῶ; how shall I meet her eyes with mine? E.IA 455).7 generally, join, unite, σ. σχοινία twist ropes (cf. συμβολεύς), Ar. Pax 37; soτοπεῖα IG22.1672.311
(iv B.C.);ὠμόλινον σ. πεντάπλουν Hp.Fist.4
;στέφανον Philostr.Her.Prooem.
; [αἱ φλέβες] σ. [τὸ σῶμα] εἰς ἕν Arist.PA 668b24
; fit together,ἁρμούς IG7.4255.23
(Oropus, iv B.C.); σ. καὶ κολλῆσαι ib. 22.1668.73 (iv B.C.);κεραῖαι συμβεβλημέναι PCair.Zen.566.10
(iii B.C.); δεξιὰς σ. ἀλλήλοισι join hands, E.IA58.8 σ. συμβόλαιά τινι or πρός τινα make a contract with a person, esp. lend him money on bond, D. 34.1, Pl.R. 425c, cf. Th.5.77 ([voice] Med.); συμβόλαιον εἰς τἀνδράποδα συμβεβλημένον money lent on the security of the slaves, D.27.27: abs., in same sense, Isoc.21.13; make a contract, Pl.Alc.1.125d, OGI669.21 (Egypt, i A.D.), Cod.Just.1.3.55.4; of a marriage contract, Mitteis Chr.372 vi 22, cf. 8 (ii A.D.); advance, lend,πέρα μεδίμνου κριθῶν Is.10.10
; ἱμάτια, χρυσία, etc., Ar.Ec. 446; ἐπί τισι on certain terms, D.H.6.29;σ. δανεισμῷ Pl.Lg. 921d
; ὁ συμβαλών the lender, creditor, D.56.2, cf. D.H.5.63 (but οἱ συμβ. the borrowers, debtors, Id.4.9):— [voice] Med., with [tense] pf. [voice] Pass., pay a share, contribute, ὁλκάδα οἱ συμβαλέεσθαι give him a merchant-vessel, Hdt.3.135, cf. Lys.32.24, X.Ages. 2.27; σ. χρήματά τινι εἰς τροφὴν τῶν στρατιωτῶν advance it, Id.An. 1.1.9, cf. IG7.2418 (Thebes, iv B.C.);τριήρεις εἰς κίνδυνον Isoc.4.98
; (iii B.C.).9 generally, contribute:— [voice] Pass.,συμβάλλεταί τις.. μερίς Alex.149.4
:—in this sense mostly in [voice] Med., τέμενος συμβάλλεσθαι add thereto, Pi.I.1.59; , cf. Hp.Aër.2, Sosip.1.37, Damox.2.11; τὸ μὴ ἀγανακτεῖν.. ἄλλα τέ μοι πολλὰ συμβάλλεται, καὶ.. many circumstances contribute to my feeling no vexation, and especially.., Pl.Ap. 36a;σ. βοήθειαν οὐ σμικρὰν πρός τι Id.Lg. 836b
; τιμὴν καὶ δόξαν τῇ πόλει ς. Isoc.Ep.8.6;οὐ δεῖ λογίζεσθαι, πότερος πλείω συμβέβληται X.Oec.7.13
; freq. with μέρος as obj., ἔργων οὐκ ἐλάχιστον μέρος ς. And.1.143;μέρος σ. πρὸς ἀρετήν Pl.Lg. 836d
, cf. R. 331b, D.41.11;οὐκ ἐλάχιστον μέρος πρὸς εὐδαιμονίαν Isoc.7.79
;συμβαλλέσθω τὸ μέρος ἕκαστος εἰς τὸ ἀνάλωμα PHal.1.108
, cf. 113 (iii B.C.);τὴν μεγίστην εἰς αὐτὰ μοῖραν Pl.Ti. 47c
, cf. X.Cyr.6.1.28: also abs., οὔτε ποταμὸς οὔτε κρήνη οὐδεμία ἐσδιδοῦσα ἐς πλῆθός οἱ συμβάλλεται contributes to its volume, Hdt.4.50;σ. πρὸς τὸ λανθάνειν X.Cyr.2.4.21
, cf. Isoc.7.21; συμβαλλόμενα contributory causes, Thphr.Sud.6: abs., to be helpful, , cf. Pl.Lg. 905b, D.21.133; φόνου κηκὶς ξ. contributes to the proof, A.Ch. 1012: rarely c. gen. partit., ξυμβάλλεται πολλὰ τοῦδε δείματος many things contribute [ their share] of this fear, i.e. join in causing it, E.Med. 284.10 συμβάλλεσθαι γνώμας contribute one's opinion to a discussion, Hdt.8.61;περί τινος Pl.Plt. 298c
;συμβαλέσθαι περί τινος λόγους X.Cyr.2.2.21
; λόγον σ. περὶ βίου contribute an opinion about life, Pl.Lg. 905c; also συμβαλέσθαι τι to have something to say, Id. Ion 532c, cf. 533a; ταῦτά σοι περὶ Ἔρωτος ς. Id.Smp. 185c; συμβαλοῦ γνώμην contribute your opinion, help in judging, S.OC 1151; σ. τὴν γνώμην τῆς βουλῆς, with or without εἰς τὸν δῆμον, communicate it, IG22.79.6, 103.17, al.; cast votes, Schwyzer 84.15 (Tylisus, v B.C.).II συμβάλλειν (sc. λόγους) converse, σ. τινί or πρός τινα, Plu.2.222c, Act.Ap.4.15:—[voice] Med., ἀτὰρ τί ἐγὼ περὶ κλοπῆς ς.; X.An.4.6.14.II bring men together in hostile sense, pit them against each other, match them,ἀμφοτέρους θεοὶ σύμβαλον Il.20.55
;ἐμὲ.. καὶ Μενέλαον συμβάλετε.. μάχεσθαι 3.70
; σ. σκύμνον λέοντος σκύλακι κυνός set one to fight with the other, Hdt.3.32; ἄνδρα ἀνδρὶ καὶ ἵππον ἵππῳ ς. Id.5.1;τοὺς ἡβῶντας σ. εἰς ἔριν περὶ ἀρχῆς X.Lac.4.2
; ἀλεκτρυόνας ς. Id.Smp.4.9;ἄνδρας φίλους Id.Cyr.6.1.32
;εἰς χεῖρα δοῦλον δεσπότῃ μὴ συμβάλῃς Philem. 206
: metaph., ἀναισχυντίᾳ σ. τινὰ καὶ προσγυμνάζειν make him contend with.., Pl.Lg. 647c.b [voice] Med., join in fight,σὺν δ' ἐβάλοντο μάχεσθαι ἐναντίον Il.12.377
.c intr., come together,σύμβαλον μάχεσθαι 16.565
; also ς. alone, come to blows, engage, ; freq. in Hdt., either abs., as 1.77,82, or c. dat. pers., ib.80, 104;Ἄρης Ἄρει δυμβαλεῖ, Δίκα Δίκᾳ A.Ch. 461
(lyr.); Ἕλληνες Μήδοις ς. Simon.136; alsoσ. πρός τινα X.Cyr.7.1.20
, Isoc.4.69;εἰς μονομαχίαν πρός τινα Str.14.5.16
; συμβάλλων coming into collision, Pl.Plt. 273a, cf. Wilcken Chr.16.6 (ii A.D.).2 σ. πόλεμον καὶ δηϊοτῆτα engage in war, Il.12.181 (prob. interpol.); so in Trag.,σ. βάκχαις μάχην E.Ba. 837
;ἔχθραν τινί Id.Med.44
; ἔριν φίλοις ib. 521: metaph., συμβαλεῖν ἔπη κακά bandy reproaches, S. Aj. 1323; .3 [voice] Med., fall in with one, meet him, c. dat., freq. in Hom., who uses [dialect] Ep. [tense] aor. forms beginning ξυμβλη- or συμβλη- solely in this sense,Νέστορι δὲ ξύμβληντο Il.14.27
, cf. 39;εἰ δ' ἄρα τις.. ξύμβληται ὁδίτης Od.7.204
;ξυμβλήμενος ἄλλος ὁδίτης 11.127
; ὅτε κεν συμβλήσεαι (leg. - βλήεαι)αὐτῷ Il.20.335
;ξυμβλήτην ἀλλήλοιιν Od.21.15
.4 so in [voice] Act., συμβαλών having met, A.Ch. 677; οἱ συμβάλλοντες those who come in contact with one, Plu.Marc.20; φιλοσόφῳ ς. Arr.Epict.3.9.13, cf. 12, POxy. 1063 (ii/iii A.D.), PFay.129.2 (iii A.D.).III compare,σμικρὰ μεγάλοισι Hdt.2.10
;ἑωυτόν τινι Id.3.160
;ἓν πρὸς ἕν Id.4.50
;τι πρός τι Lycurg.68
;πρὸς ἄλληλα Pl.Tht. 186b
;οὐδὲν ἦν τούτων.. πρὸς ἀτταγῆνα συμβαλεῖν Phoenicid.2.5
:—[voice] Pass., Hdt.2.10, 3.125; τὸ ἀργύριον τὸ Βαβυλώνιον πρὸς τὸ Εὐβοικὸν συμβαλλόμενον τάλαντον the Babyl. talent being compared with, reduced to, the Euboic, ib.95.b compare for the purpose of checking, μέτρῳ συμβεβλημένῳ πρὸς τὸ χαλκοῦν Wilcken Chr.410.11 (iii B.C.), etc.2 [voice] Med., reckon, compute, Hdt.2.31, 4.15, 6.63,65:—[voice] Pass.,ἡ ὁδὸς ἡ ἡμερησίη ἀνὰ διηκόσια στάδια συμβέβληταί μοι Id.4.101
.3 conclude, infer, conjecture, interpret,συμβαλεῖν τι Pi.N.11.33
; σ. ὅτι .. Pl.Cra. 412c; τοῦτο ς. S.OC 1474; τοῦτο σ., ὅτι.. Ar.V.50; τὰ πρὶν οὐκ εὔγνωστα ς. E.Or.[1394];εὖ ξυνέβαλεν αὐτά Ar.Eq. 427
;ἣν [νόσον] οὐδ' ἂν εἷς γνοίη ποτ' οὐδ' ἂν ξυμβάλοι Id.V.72
;σ. ἔπη E.Med. 675
;τοὖναρ Id.IT55
;τὴν μαντείαν Pl.Cra. 384a
;τὸν χρησμόν Arist.Fr. 532
, cf. 76;σήματα σ., εἰ.. ἤ.. Arat.1146
: abs., καθὼς συμβάλλομεν ἐκ τοὖ .. Sor.2.63:—[voice] Med., abs., Heraclit.47, freq. in Hdt., as 2.33, 4.87: c. acc., make out, understand, τὸ πρῆγμα ib. 111;σ. τι ἔκ τινος 6.107
; τῇδε, ὅτι .. from the fact that.., 3.68: c. acc. et inf., 1.68, 2.33, 112, al.; folld. by indirect question, 4.45.IV agree, arrange,καθάπερ ξυνέβαλον ἢ διέθεντο IG12.46.14
;πρὸς ἐμὲ πάντες συμβάλλετε X.Cyr. 6.2.41
:—[voice] Med., make a treaty, Foed. ap. Th.5.77; agree upon, fix, settle,λόφον εἰς ὃν δέοι ἁλίζεσθαι X.An.6.3.3
;ἔδει σε, καθότι συνεβάλου ἡμῖν, Ἡρακλείδην.. ἀπεσταλκέναι PCair.Zen.314.1
(iii B.C.).Greek-English dictionary (Αγγλικά Ελληνικά-λεξικό) > συμβάλλω
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123 συντελέω
A (Halic.. iv/iii B.C.), [dialect] Att. (Rhamnus, iii B.C.):—bring to an end, complete, σ. τὴν δαπάνην make up the whole expense, D.14.20; σ. εἰς τὰ ἑκατὸν ἅρματα make up the number of the chariots to one hundred, X.Cyr.6.1.50; of a workman, σ. γεῖσον finish it off, Lys.Fr. 185 S. ([voice] Pass.), cf. IG12.372E14; στέφανον Test. ap. D.21.22;ναῦς Plb.1.21.3
([voice] Pass.); σ. ταχύ finish it in a hurry, Alex.149.12; σ. τὴν ἐπίνοιαν accomplish it, Plb.4.81.3; , Gal.15.59:—[voice] Med.. Plb.1.9.6, PFay.12.8 (ii B.C.), D.S.1.59;ἵνα περὶ ὧν καταπέπλευκας συντετελεσμένος.. ἀναπλεύσῃς PSI6.614.9
(iii B.C.), cf. Plb.5.100.9:— [voice] Pass., Inscr.Délos 502 A 15 (iii B.C.), PCair.Zen.124.7 (iii B.C.), D.S.12.26, Ev.Marc.13.4, etc.;λιθάρια συντετελεσμένα PHolm.5.4
.b [voice] Act., c. inf., σ. καταφαγεῖν finish eating, LXX Ge.43.2, cf. Si.24.28: c. part., ib.Nu.4.15, 3 Ki.8.54.c perpetrate, (i B.C.):—[voice] Med.,περὶ ὧν συντετέλεσται, τυχεῖν αὐτὸν.. τιμωρίας PEnteux.50.7
(iii B.C.), cf. Klio 16.150 (Delph., ii B.C.):— [voice] Pass., SIG684.5 (Dyme, ii B.C.), BGU1762.7, al. (i B.C.).2 [voice] Pass., to be caused, brought about, freq. in Epicur., πλεοναχῶς ς., of a plurality of causes, Ep.2p.37U., cf. p.50 U.; simply, occur, happen,τὰς συντελουμένας.. φάσεις Ptol.Phas.p.10
H.3 celebrate or hold sacred rites, ; , al., Supp.Epigr.1.366.29 (Samos, iii B.C.);τὴν ἡμέραν Epicur.Fr. 217
; τὸν ἀγῶνα, τὴν πανήγυριν, D.S.11.29, 17.16;τὰ Ἴσθμια Plu.Ages.21
; (Cyzicus, i B.C.):—[voice] Pass., θυσία τῷ Διὶ ς. Arist.Mir. 844a35, cf. PEnteux.6.6 (iii B.C.).II pay towards common expenses, contribute,σ. ἑξήκοντα τάλαντα Aeschin.3.95
; but mostly without the sum expressed, ἐν ταῖς εἰσφοραῖς σ. εἰς τὸν πόλεμον contribute by payment of the εἰσφοραί towards the war, D.20.28.2 generally, contribute, πρὸς or εἰς τὴν γένεσιν, Arist.GA 715a12, HA 509a29;πρὸς μίαν ἀρχήν Id.PA 669b19
; πρὸς ἓν ἅπαντα ς. Id.EN 1096b28;εἰς ἀνάδοσιν τροφῆς Gal.15.196
: also c. dat., to be of service, be profitable, help,τῷ βίῳ Alex.271
;τῇ λεπτυνούσῃ διαίτῃ Gal.Vict.Att. 6
;τινὶ πρός τι Luc.Alex.36
:—[voice] Pass., to be contributed, , al.3 ὧν οὐδὲν εἰς τὴν ἐξαλλαγὴν σ. τῆς ἐπιμελείας none of which make for (require) a change of treatment, Sor.2.17.III since at Athens all citizens were classed acc. to their rateable property, and the contributions to which they were liable, σ. εἰς.. meant to belong to a class, be counted in it (cf.τελέω 11.3
),σ. εἰς ἄνδρας Isoc.12.212
;εἰς τοὺς νόθους D.23.213
; ἐς τὸ μετοικικόν, ἐς τὸ συνέδριον, Luc.Bis Acc.9, Deor.Conc.15: c. dat.,σ. τῷ χορῷ Alciphr.3.71
.2 σ. ἐς Ἀθήνας, ἐς Ὀρχομενόν, εἰς τὸ Ἀρκαδικόν, used of communities united in or to a state, Th.2.15, 4.76, X.HG7.4.12: c. dat.,σ. Θηβαίοις Isoc.14.8
, cf. Plu.Arat.34: abs., Μακεδονίας καὶ τῶν συντελούντων the tributaries, ib.54: cf. sq. 111.Greek-English dictionary (Αγγλικά Ελληνικά-λεξικό) > συντελέω
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124 storm
storm [stɔ:m]1 noun∎ British it was a storm in a teacup ce fut une tempête dans un verre d'eau∎ the arms deal caused a political storm la vente d'armes a déclenché un véritable scandale politique;∎ a storm of protest une tempête de protestations;∎ a storm of criticism une marée de condamnations;∎ a storm of applause une tempête d'applaudissements;∎ a storm of abuse une tornade d'injures∎ to take by storm prendre d'assaut;∎ figurative the show took Broadway by storm le spectacle a connu un succès foudroyant à Broadway∎ to storm in/out entrer/sortir comme un ouragan;∎ she stormed off without saying a word elle est partie furieuse, sans dire un mot;∎ she was storming about the place like a madwoman elle se démenait dans la pièce comme une folle(b) (be angry) tempêter, fulminer∎ it stormed all night il y a eu de l'orage toute la nuit∎ the enemy stormed through our defences l'ennemi donna l'assaut et franchit nos lignes de défenseprendre d'assaut;∎ the troops stormed the ramparts les troupes ont pris d'assaut les remparts►► American storm cellar abri m contre les cyclones;storm centre Meteorology œil m de la tempête ou du cyclone; figurative centre m de l'agitation, point m névralgique;storm cloud Meteorology nuage m d'orage; figurative nuage m menaçant;∎ the storm clouds of war were gathering le danger ou la menace d'une guerre grandissait;storm cock draine f, grive f de gui;storm cone cône m de tempête;storm damage dommages mpl ou dégâts mpl causés par l'orage ou la tempête;American storm door porte f extérieure (qui double la porte de la maison pour éviter les courants d'air);storm drain égout m pluvial;storm lantern lampe f tempête;Ornithology storm petrel pétrel-tempête m;storm sewer égout m pluvial;storm trooper membre m des troupes d'assaut;storm troops troupes fpl d'assaut;storm warning avis m de tempête;storm window contre-fenêtre f -
125 suffering
suffering ['sʌfərɪŋ]1 nounsouffrance f, souffrances fpl;∎ war causes great suffering la guerre est cause de nombreuses souffrances;∎ all their sufferings have been unnecessary toutes leurs souffrances ont été inutilessouffrant, qui souffre -
126 Toyota production system
Opsa manufacturing system, developed by Toyota in Japan after World War II, which aims to increase production efficiency by the elimination of waste in all its forms. The Toyota production system was invented, and made to work, by Taiichi Ohno. Japan’s fledgling car-making industry was suffering from poor productivity, and Ohno was brought into Toyota with an initial assignment of catching up with the productivity levels of Ford’s car plants. In analyzing the problem, he decided that although Japanese workers must be working at the same rate as their American counterparts, waste and inefficiency were the main causes of their different productivity levels. Ohno identified waste in a number of forms, including overproduction, waiting time, transportation problems, inefficient processing, inventory, and defective products. The philosophy of TPS is to remove or minimize the influence of all these elements. In order to achieve this, TPS evolved to operate under lean production conditions. It is made up of soft, or cultural aspects, such as automation with the human touch— autonomation—and hard, or technical, aspects, which include just-in-time, kanban, and production smoothing. Each aspect is equally important and complementary. TPS has proven itself to be one of the most efficient manufacturing systems in the world but although leading companies have adopted it in one form or another, few have been able to replicate the success of Toyota.Abbr. TPS -
127 Barnaby, Kenneth C.
SUBJECT AREA: Ports and shipping[br]b. c.1887 Englandd. 22 March 1968 England[br]English naval architect and technical author.[br]Kenneth Barnaby was an eminent naval architect, as were his father and grandfather before him: his grandfather was Sir Nathaniel Barnaby KGB, Director of Naval Construction, and his father was Sydney W.Barnaby, naval architect of John I. Thornycroft \& Co., Shipbuilders, Southampton. At one time all three were members of the Institution of Naval Architects, the first time that this had ever occurred with three members from one family.Kenneth Barnaby served his apprenticeship at the Thornycroft shipyard in Southampton and later graduated in engineering from the Central Technical College, South Kensington, London. He worked for some years at Le Havre and at John Brown's shipyard at Clydebank before rejoining his old firm in 1916 as Assistant to the Shipyard Manager. In 1919 he went to Rio de Janeiro as a chief ship draughtsman, and finally he returned to Thornycroft, in 1924 he succeeded his father as Naval Architect, and remained in that post until his retirement in 1955, having been appointed a director in 1950.Barnaby had a wide knowledge and understanding of ships and ship design and during the Second World War he was responsible for much of the development work for landing craft, as well as for many other specialist ships built at the Southampton yard. His experience as a deep-sea yachtsman assisted him. He wrote several important books; however, none can compare with the Centenary Volume of the Royal Institution of Naval Architects. In this work, which is used and read widely to this day by naval architects worldwide, he reviewed every paper presented and almost every verbal contribution made to the Transactions during its one hundred years.[br]Principal Honours and DistinctionsOBE 1945. Associate of the City and Guilds Institute. Royal Institution of Naval Architects Froude Gold Medal 1962. Honorary Vice-President, Royal Institution of Naval Architects 1960–8.Bibliographyc.1900, Marine Propellers, London. 1949, Basic Naval Architecture, London.1960, The Institution of Naval Architects 1860–1960, London.1964, 100 Years of Specialised Shipbuilding and Engineering, London. 1968, Some Ship Disasters and their Causes, London.FMW -
128 Merica, Paul Dyer
SUBJECT AREA: Metallurgy[br]b. 17 March 1889 Warsaw, Indiana, USAd. 20 October 1957 Tarrytown, New York, USA[br]American physical metallurgist who elucidated the mechanism of the age-hardening of alloys.[br]Merica graduated from the University of Wisconsin in 1908. Before proceeding to the University of Berlin, he spent some time teaching in Wisconsin and in China. He obtained his doctorate in Berlin in 1914, and in that year he joined the US National Bureau of Standards (NBS) in Washington. During his five years there, he investigated the causes of the phenomenon of age-hardening of the important new alloy of aluminium, Duralumin.This phenomenon had been discovered not long before by Dr Alfred Wilm, a German research metallurgist. During the early years of the twentieth century, Wilm had been seeking a suitable light alloy for making cartridge cases for the Prussian government. In the autumn of 1909 he heated and quenched an aluminium alloy containing 3.5 per cent copper and 0.5 per cent magnesium and found its properties unremarkable. He happened to test it again some days later and was impressed to find its hardness and strength were much improved: Wilm had accidentally discovered age-hardening. He patented the alloy, but he made his rights over to Durener Metallwerke, who marketed it as Duralumin. This light and strong alloy was taken up by aircraft makers during the First World War, first for Zeppelins and then for other aircraft.Although age-hardened alloys found important uses, the explanation of the phenomenon eluded metallurgists until in 1919 Merica and his colleagues at the NBS gave the first rational explanation of age-hardening in light alloys. When these alloys were heated to temperatures near their melting points, the alloying constituents were taken into solution by the matrix. Quenching retained the alloying metals in supersaturated solid solution. At room temperature very small crystals of various intermetallic compounds were precipitated and, by inserting themselves in the aluminium lattice, had the effect of increasing the hardness and strength of the alloy. Merica's theory stimulated an intensive study of hardening and the mechanism that brought it about, with important consequences for the development of new alloys with special properties.In 1919 Merica joined the International Nickel Company as Director of Research, a post he held for thirty years and followed by a three-year period as President. He remained in association with the company until his death.[br]Bibliography1919, "Heat treatment and constitution of Duralumin", Sci. Papers, US Bureau of Standards, no. 37; 1932, "The age-hardening of metals", Transactions of the American Institution of Min. Metal 99:13–54 (his two most important papers).Further ReadingZ.Jeffries, 1959, "Paul Dyer Merica", Biographical Memoirs of the National Academy of Science 33:226–39 (contains a list of Merica's publications and biographical details).LRD
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