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1 deficiency
[dɪ'fɪʃənsɪ]1) (shortage) mancanza f., scarsità f. (of, in di)2) (weakness) debolezza f., carenza f.3) med. carenza f. (of di); (defect) difetto m., insufficienza f.* * *plural - deficiencies; noun ((a) shortage or absence of what is needed.) scarsità, mancanza* * *deficiency /dɪˈfɪʃnsɪ/n.2 lacuna; mancanza: to make up a deficiency, colmare una lacuna; deficiencies in safety procedures, mancanze nelle procedure di sicurezza; (fin.) a deficiency in taxes, un deficit nel gettito tributario3 [u] (med.) deficienza; carenza: vitamin [iron] deficiency, carenza vitaminica [di ferro]; deficiency diseases, malattie da carenza; immune deficiency, immunodeficienza● (leg.) deficiency account, rendiconto delle cause dell'insolvenza □ (fin., USA) deficiency appropriation, stanziamento suppletivo □ (comm.) deficiency in weight, ammanco di peso □ (econ.) deficiency payment, compenso integrativo ( all'agricoltura).* * *[dɪ'fɪʃənsɪ]1) (shortage) mancanza f., scarsità f. (of, in di)2) (weakness) debolezza f., carenza f.3) med. carenza f. (of di); (defect) difetto m., insufficienza f. -
2 deficiency
deficiency [dɪˈfɪ∫ənsɪ]b. (in character, system) faille f ; (in construction, machine) imperfection f ; (in service) faiblesse f* * *[dɪ'fɪʃənsɪ]1) ( shortage) insuffisance f (of, in de); Medicine carence f (of en)2) ( weakness)his deficiencies as a poet — ses faiblesses fpl en tant que poète
3) Medicine défaut m -
3 deficiency
1 ( shortage) (of funds, resources etc) manque m, insuffisance f (of, in de) ; Med carence f (of en) ; iron/vitamin deficiency carence en fer/vitamines ; deficiency disease maladie de or par carence ;2 ( weakness) (of argument, answer) faiblesse f ; his deficiencies as a poet ses faiblesses en tant que poète ;3 Med ( defect) défaut m ; a hearing deficiency un défaut de l'ouïe ; liver/heart deficiency insuffisance f hépatique/cardiaque. -
4 πίπτω
A Exc. ex libris Herodiani p.28 (cf. Hdn.Gr.2.377 note); poet. subj.πίπτῃσι Pl.Com. 153.5
: [dialect] Ep. [tense] impf.πῖπτον Il.8.67
, etc. (for the quantity of ι cf. Hdn. Gr.2.10); [dialect] Ion. πίπτεσκον ( συμ-) Emp.59.2: [tense] fut. (lyr.), etc.; [dialect] Ion.[ per.] 3pl.πεσέονται Il.11.824
, [ per.] 3sg.πεσέεται Hdt.7.163
, 168: [tense] aor. ἔπεσον, inf. πεσεῖν, Il.13.178, etc.; [ per.] 2sg. opt.πεσοίης Polem.Call. 10.14
; [dialect] Aeol. and [dialect] Dor.ἔπετον Alc.60
, Pi.O.7.69, P.5.50, ([etym.] κάπετον) O.8.38, (ἐμ-) P.8.81, cf. Isyll.8, IG14.642 ([place name] Thurii); in later writers ἔπεσα, Orph.A. 521, LXX Le.9.24, al., f.l. in E.Tr. 291 ( προς-): [tense] pf. , Ar.Ra. 970, etc.; [dialect] Ep. part. πεπτεώς, εῶτος (the εω forming one syll. by synizesis), Il.21.503, etc.; also πεπτηώς, ηυῖα, Od.14.354, Simon.183.7, Hp.Mul.1.69, A.R.4.1298, AP7.427 (Antip. Sid.), cf. πτήσσω; Trag. part. , Ant. 697. (Redupl. from πετ-, which appears in [dialect] Aeol. and [dialect] Dor. [tense] aor. ἔ-πετ-ον (v. supr.), and the poet. form πίτ-νω; cogn. with πέτομαι, q.v.)A Radical sense, fall down, and (when intentional) cast oneself down, πρηνέα πεσεῖν, ὕπτιος πέσεν, Il.6.307, 15.435, etc.;νιφάδες.. π. θαμειαί 12.278
;ὀπίσω πέσεν Od.12.410
; etc.:—Constr., with Preps., in Hom. almost always ἐν.., ἐν κονίῃσι π. fall in the dust, i.e. to rise no more, Il.11.425, cf. 13.205;ἐν αἵματι καὶ κονίῃσι πεπτεῶτας Od.22.384
; π. ἐν ἀγκοίνῃσί τινος fall into his arms, Hes.Fr.142.5; ἐν χθονὶ πεπτηώς Simon.l.c. (cf. πτήσσω)π. ἐν δεμνίοις E.Or.35
, cf. A.Pers. 125 (lyr.) (v. infr. B. 1): rare in Prose,π. ἐν ποταμῷ X.Ages.1.32
: c. dat. only,πεδίῳ πέσε Il.5.82
; δεμνίοις π. E.Or.88 (s. v.l.);π. ἐπὶ χθονί Od.24.535
;οὐδέ οἱ ὕπνος πῖπτεν ἐπὶ βλεφάροις Hes.Fr.188.4
; (lyr.); ;πρὸς ἀγκάλαις Id. Ion 962
;ἀμφὶ σώμασίν τινων A.Ag. 326
: with a Prep. of motion first in Hes.,Πληϊάδες π. ἐς πόντον Op. 620
; [ποταμὸς] εἰς ἅλα Th. 791
;εἰς ἄντλον E.Hec. 1025
(lyr.);ἐπὶ γᾶν π. αἷμα A.Ag. 1019
(lyr.);ἐπὶ στόμα X.Cyn.10.13
;πρὸς οὖδας E.Hec. 405
.2 in Hom. with Advs. of motion as well as of rest, χαμάδις π. Il.7.16, 15.714, etc.; χαμαὶ π. 4.482, cf. 14.418, etc.;π. ἔραζε 12.156
, cf. Od.22.280.3 with Preps. denoting the point from which one falls,ἀπ' ὤμων χαμαὶ πέσε Il.16.803
;ἀπ' οὐρανοῦ A.Fr.44.3
;ἀπό τινος ὄνου Pl. Lg. 701d
;ἐκ χειρῶν π. ἡνία Il.5.583
;π. ἐκ νηός Od.12.417
; .4 Geom., of perpendiculars or parts of applied figures, π. ἐπί τι fall upon, Euc.3.11, Archim.Fluit. 2.8, al., Apollon.Perg.Con.1.2; but π. ἐπί τι, ποτί τι, intersect, meet, Archim.Con.Sph.16, Spir.15; π. διά τινος pass through, Id.Con.Sph. 17;π. κατά τινος Id.Sph.Cyl.1
Def.2;ἐπί τι κατά τινα Apollon.Perg. Con.1.2
.B Special usages:I πίπτειν ἔν τισι fall violently upon, attack,ἐνὶ νήεσσι πέσωμεν Il.13.742
(but ἐν νήεσσι πεσόντες tumbling into the ships, 2.175); ἐν βουσὶ π. S.Aj. 375 (lyr.); Ἔρως, ὃς ἐν κτήμασι π. Id.Ant. 782(lyr.); ἐπ' ἀλλήλοισι, of combatants, Hes.Sc. 379, cf. 375;πρὸς μῆλα καὶ ποίμνας S.Aj. 1061
;πρὸς πύλαις A.Th. 462
.2 throw oneself down, fall down, πρὸς βρέτη θεῶν ib. 185 ;ἀμφὶ σὸν γόνυ E.Hec. 787
; ἐς γόνατα on one's knees, of a wrestler, Simon.156 ;ἐς τὸν ὦμον Ar.Eq. 571
.II fall in battle,πῖπτε δὲ λαός Il.8.67
, etc.; οἱ πεπτωκότες the fallen, X.Cyr.1.4.24 ;νέκυες πίπτοντες Il.10.200
; ;πεσήματα.. πέπτωκε δοριπετῆ νεκρῶν Id.Andr. 653
;π. ὑπὸ Ἀθηναίων Hdt.9.67
;ὡς.. θάμνοι πρόρριζοι πίπτουσι.., ὣς ἄρ' ὑπ' Ἀτρεΐδῃ πῖπτε κάρηνα Τρώων Il.11.157
, cf. 500, etc. ;τὸ Περσῶν ἄνθος οἴχεται πεσόν A.Pers. 252
.2 fall, be ruined, , cf. Pl.Phlb.22 e;πεσεῖν.. πτώματ' οὐκ ἀνασχετά A.Pr. 919
, cf. Pl.La. 181b ; ; ἀβουλίᾳ, ἐξ ἀβουλίας π., Id.El. 429, 398 ;ἀπὸ σμικροῦ κακοῦ Id.Aj. 1078
; of an army,μεγάλα πεσόντα πρήγματα ὑπὸ ἡσσόνων Hdt.7.18
, cf. Th.2.89 ; ; of a city,π. δορί E.Hec. 5
.3 fall, sink, ἄνεμος πέσε the wind fell, Od.19.202 (but in Hes. Op. 547, Βορέαο πεσόντος is used for ἐμπεσόντος, falling on, blowing on one): metaph,πέπτωκεν κομπάσματα A.Th. 794
, cf. S.Ant. 474 : c. dat., ταῖς ἐλπίσι πεσεῖν fail in one's hopes, Plb.1.87.1.III πίπτειν ἔκ τινος fall out of, lose a thing, unintentionally, σοι ἐκ θυμοῦ πεσέειν fall out of, lose thy favour, Il.23.595 ; ἐξ ἐλπίδων π. E.Fr.420.5 ;τοὔμπαλιν π. φρενῶν Id.Hipp. 390
; also of set purpose, ἐξ ἀρκύων π. escape from.., A.Eu. 147 ;ἔξω τῶν κακῶν Ar.Ra. 970
.2 reversely, πολλὴν ἐς κακότητα π. Thgn.42 ;εἰς ἄτην Sol.13.68
;εἰς δουλοσύνην Id.9.4
;ἐς δάκρυα Hdt.6.21
; ; εἰς ἔρον, ἔριν, ὀργήν, φόβον, ἀνάγκας, E.IT 1172, Fr.578.8, Or. 696, Ph.69, Th.3.82 ; also ἐν γυιοπέδαις π. Pi.P.2.41 ;ἐν μέσοις ἀρκυστάτοις S.El. 1476
; (lyr.) ;ἐν σολοικισμῷ Luc.Sol.3
;πρὸς τόλμαν S.Ichn. 11
: c. dat. only,π. δυσπραξίαις Id.Aj. 759
; , etc.; οὐκ ἔχω ποῖ γνώμης πέσω I know not which way to turn, ib. 705.3 εἰς ὕπνον π. fall asleep, Id.Ph. 826 ; butἐν ὕπνῳ Pi.I.4(3).23
; simply ὕπνῳ, A.Eu.68.4 π. εἰς (ἰατρικὴν) χρῆσιν to be applied to (medicinal) use, Dsc.5.19,151,al.5 π. ὑπ' αἴσθησιν to be accessible to perception, Iamb.Comm.Math.8, in Nic.p.7 P.IV πίπτειν μετὰ ποσσὶ γυναικός to fall between her feet, i.e. to be born, Il.19.110.V of the dice, τὰ δεσποτῶν εὖ πεσόντα θήσομαι I shall count my master's lucky throws my own, A.Ag.32; ;ὥσπερ οἱ κύβοι· οὐ ταὔτ' ἀεὶ πίπτουσιν Alex.34
; ὥσπερ ἐν πτώσει κύβων πρὸς τὰ πεπτωκότα τίθεσθαι τὰ πράγματα according to the throws, Pl.R. 604c ; ὄνασθαι πρὸς τὰ νῦν π. E.Hipp. 718; πρὸς τὸ πῖπτον as matters fall out, Id.El. 639 ; of tossing up with oystershells,κἂν μὲν πίπτῃσι τὰ λεύκ' ἐπάνω Pl.Com.153.5
; of lots, ὁ κλῆρος π. τινί or παρά τινα, Pl.R. 619e, 617e;ἐπί τινα Act.Ap.1.26
: Astrol., π. καλῶς ὁ οἰκοδεσπότης Vett. Val.7.15.2 generally, fall, turn out, εὖ πίπτειν to be lucky, E.Or. 603; παρὰ γνώμαν π. Pi.O.12.10; of a battle, καραδοκήσοντα τὴν μάχην τῇ πεσέεται to wait and see how it would fall, Hdt.7.163, cf. 8.130; λόγων κορυφαὶ ἐν ἀλαθείᾳ π. turn out true, Pi.O.7.69; .3 fall to one, i.e. to his lot, esp. of revenues, accrue,τῷ δήμῳ πρόσοδος ἔπιπτε Plb.30.31.7
;φησιν.. ἑξακισχίλια τάλαντα τοῖς Λακεδαιμονίοις πεσεῖν Id.2.62.1
; τὴν πεπτωκότα (sic)μοι οἰκίαν BGU251.12
(ii A. D.);τὰ πίπτοντα διάφορα ἐκ τῶν μυστηρίων IG5(1).1390.45
(Andania, i B. C.);τὸ πεσὸν ἀπὸ τῆς τιμῆς ἀργύριον D.H.20.17
; to be paid,τῶν εἰς Καίσαρα πίπτειν ὀφειλόντων ἐξεταστής Str.17.1.12
;τὰ πεπτωκότα εἰς τὸ.. ἱερόν PEleph.10.2
(iii B. C.);π. ἐπὶ τράπεζαν PCair.Zen.236.7
(iii B. C.), PLond.3.1200.1 (ii B. C.) ;μὴ πιπτόντων τῶν τόκων BMus.Inscr.1032.40
([place name] Teos) ; πέπτωκεν ἁλικῆς διά τινος .. Ostr.Bodl.i3 (iii B. C.) (but τὰ ἀπὸ τῶν προσόδων πίπτοντα deficiencies, IPE12.32B 75 ([place name] Olbia)).VII fall under, belong to a class,εἰς γένη ταῦτα Arist.Metaph. 1005a2
, al.; ἐπὶ τὴν αὐτὴν ἐπιστήμην ib. 982b8 ;ὑπὸ τὴν αὐτὴν μέθοδον Id.Top. 102a37
, cf. 151a15 ;ὑπὸ τέχνην οὐδεμίαν Id.EN 1104a8
; ;τὸ μακάριον ἐνταῦθα πεπτωκέναι Epicur.Ep.1p.28U.
;ὅσα πέπτωκεν ὑπὸ τὴν.. ἱστορίαν Plb.2.14.7
. -
5 Huygens, Christiaan
SUBJECT AREA: Horology[br]b. 14 April 1629 The Hague, the Netherlandsd. 8 June 1695 The Hague, the Netherlands[br]Dutch scientist who was responsible for two of the greatest advances in horology: the successful application of both the pendulum to the clock and the balance spring to the watch.[br]Huygens was born into a cultured and privileged class. His father, Constantijn, was a poet and statesman who had wide interests. Constantijn exerted a strong influence on his son, who was educated at home until he reached the age of 16. Christiaan studied law and mathematics at Ley den University from 1645 to 1647, and continued his studies at the Collegium Arausiacum in Breda until 1649. He then lived at The Hague, where he had the means to devote his time entirely to study. In 1666 he became a Member of the Académie des Sciences in Paris and settled there until his return to The Hague in 1681. He also had a close relationship with the Royal Society and visited London on three occasions, meeting Newton on his last visit in 1689. Huygens had a wide range of interests and made significant contributions in mathematics, astronomy, optics and mechanics. He also made technical advances in optical instruments and horology.Despite the efforts of Burgi there had been no significant improvement in the performance of ordinary clocks and watches from their inception to Huygens's time, as they were controlled by foliots or balances which had no natural period of oscillation. The pendulum appeared to offer a means of improvement as it had a natural period of oscillation that was almost independent of amplitude. Galileo Galilei had already pioneered the use of a freely suspended pendulum for timing events, but it was by no means obvious how it could be kept swinging and used to control a clock. Towards the end of his life Galileo described such a. mechanism to his son Vincenzio, who constructed a model after his father's death, although it was not completed when he himself died in 1642. This model appears to have been copied in Italy, but it had little influence on horology, partly because of the circumstances in which it was produced and possibly also because it differed radically from clocks of that period. The crucial event occurred on Christmas Day 1656 when Huygens, quite independently, succeeded in adapting an existing spring-driven table clock so that it was not only controlled by a pendulum but also kept it swinging. In the following year he was granted a privilege or patent for this clock, and several were made by the clockmaker Salomon Coster of The Hague. The use of the pendulum produced a dramatic improvement in timekeeping, reducing the daily error from minutes to seconds, but Huygens was aware that the pendulum was not truly isochronous. This error was magnified by the use of the existing verge escapement, which made the pendulum swing through a large arc. He overcame this defect very elegantly by fitting cheeks at the pendulum suspension point, progressively reducing the effective length of the pendulum as the amplitude increased. Initially the cheeks were shaped empirically, but he was later able to show that they should have a cycloidal shape. The cheeks were not adopted universally because they introduced other defects, and the problem was eventually solved more prosaically by way of new escapements which reduced the swing of the pendulum. Huygens's clocks had another innovatory feature: maintaining power, which kept the clock going while it was being wound.Pendulums could not be used for portable timepieces, which continued to use balances despite their deficiencies. Robert Hooke was probably the first to apply a spring to the balance, but his efforts were not successful. From his work on the pendulum Huygens was well aware of the conditions necessary for isochronism in a vibrating system, and in January 1675, with a flash of inspiration, he realized that this could be achieved by controlling the oscillations of the balance with a spiral spring, an arrangement that is still used in mechanical watches. The first model was made for Huygens in Paris by the clockmaker Isaac Thuret, who attempted to appropriate the invention and patent it himself. Huygens had for many years been trying unsuccessfully to adapt the pendulum clock for use at sea (in order to determine longitude), and he hoped that a balance-spring timekeeper might be better suited for this purpose. However, he was disillusioned as its timekeeping proved to be much more susceptible to changes in temperature than that of the pendulum clock.[br]Principal Honours and DistinctionsFRS 1663. Member of the Académie Royale des Sciences 1666.BibliographyFor his complete works, see Oeuvres complètes de Christian Huygens, 1888–1950, 22 vols, The Hague.1658, Horologium, The Hague; repub., 1970, trans. E.L.Edwardes, AntiquarianHorology 7:35–55 (describes the pendulum clock).1673, Horologium Oscillatorium, Paris; repub., 1986, The Pendulum Clock or Demonstrations Concerning the Motion ofPendula as Applied to Clocks, trans.R.J.Blackwell, Ames.The balance spring watch was first described in Journal des Sçavans 25 February 1675, and translated in Philosophical Transactions of the Royal Society (1675) 4:272–3.Further ReadingH.J.M.Bos, 1972, Dictionary of Scientific Biography, ed. C.C.Gillispie, Vol. 6, New York, pp. 597–613 (for a fuller account of his life and scientific work, but note the incorrect date of his death).R.Plomp, 1979, Spring-Driven Dutch Pendulum Clocks, 1657–1710, Schiedam (describes Huygens's application of the pendulum to the clock).S.A.Bedini, 1991, The Pulse of Time, Florence (describes Galileo's contribution of the pendulum to the clock).J.H.Leopold, 1982, "L"Invention par Christiaan Huygens du ressort spiral réglant pour les montres', Huygens et la France, Paris, pp. 154–7 (describes the application of the balance spring to the watch).A.R.Hall, 1978, "Horology and criticism", Studia Copernica 16:261–81 (discusses Hooke's contribution).DV
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