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21 linea
f linelinea dell'autobus bus routemantenere la linea keep one's figuretelecommunications restare in linea stay on the line, not hang up* * *linea s.f.1 (segno, tratto) line: tracciare una linea, to draw a line; linea retta, curva, convergente, divergente, straight, curved, convergent, diverging line; linea punteggiata, tratteggiata, dotted line; le linee della mano, the lines of the hand; linea di confine, (tra due proprietà) boundary line, (tra due paesi) border, (fig.) borderline; linea di partenza, starting line; linea spartitraffico, traffic line; linea di giunzione, (di stoffa, lamiere ecc.) seam // avanzare in linea retta, to move forward in a straight line // procedere in linee parallele, to follow parallel lines // ( sport): linea laterale, touchline; linea mediana, half-back line; linea di fondo (campo), baseline // (geogr.): linea del cambiamento di data, International Date Line; linea di costa, coastline (o shoreline); linea delle nevi perenni, snowline; linea di displuvio, divide (o watershed); linea di spiaggia, shoreline (o beachline) // (geofisica): linea agonica, agonic line; linea isogonica, isogonic line; linea isosismica, isoseismal (o isoseismic) line // (cartografia): linea isometrica, isometric line (o isogram o isoline); linea ortodromica, orthodrome // (topografia) linea di base, baseline // distanza in linea d'aria, (distance) as the crow flies: in linea d'aria ci sono 10 km da qui allo stadio, it's 10 km from here to the stadium as the crow flies // (fis.): linea di forza, line of force; linea di flusso, streamline // linea di fede, (di strumenti) fiducial (o halving) line // (mar.): linea di galleggiamento, waterline; linea di rispetto, limit of territorial waters; linea di scandaglio, lead line; linea di rotta, heading line2 (di termometro) degree: avere qualche linea di febbre, to have a slight temperature; la febbre del paziente è scesa di qualche linea, the patient's temperature has dropped slightly3 (contorno, sagoma) line; (di abito) line, cut: non mi piace la linea di quell'automobile, I don't like the line of that car; le linee architettoniche di un edificio, the architectural lines of a building; armonia di linee, harmony of lines; una giacca di ottima linea, a well-cut jacket; un tailleur di linea classica, moderna, a classic, modern suit // descrivere a grandi linee, (fig.) to outline; ti posso esporre il programma solo a grandi linee per il momento, I can only give you a rough outline of the programme at the moment4 (personale) figure: avere una bella linea, to have a good figure; che linea!, what a figure!; perdere la linea, to lose one's figure; riacquistare la linea, to get one's figure back (o to regain one's figure); si rovina la linea mangiando troppi dolci, she is ruining her figure (o she is putting on too much weight) by eating too many sweet things5 (comportamento, strategia) line: linea di condotta, di azione, line of conduct, of action; mi atterrò alla linea del partito, I'll follow the party line; seguire una linea, to follow (o to take) a line; non so che linea tenere con lui, I don't know what line to take with him // le sue idee sono in linea con le mie, his ideas are in line with mine // in linea di principio, in principle // in linea di massima, as a rule (o generally speaking)6 (fila) line: mettersi in linea, to get in line (o in the queue) // (mil.): linea del fuoco, line of fire; linea di mira, line of sight; fuoco di linea, line-firing; linea di difesa, defence line // prima linea, firing line (o front line); fanteria di prima linea, front-line infantry troops // essere in prima linea, to be at the front line, (fig.) to be at the fore front // passare in seconda linea, to take second place; il problema è passato in seconda linea, the problem took second place // vittoria su tutta la linea, (anche fig.) victory all along the line // ( sport): linea di attacco, forward line; linea di difesa, the backs // motore a sei cilindri in linea, six cylinder in-line (o straight-six o in-line six) engine7 (serie di prodotti) line: linea di prodotti, product line; linea di prodotti di alta qualità, line of high-quality products; linea di accessori, line of accessories; una linea completa di cosmetici, a complete line of cosmetics8 (econ.) line: linea di produzione, di lavorazione, production line; linea di montaggio, assembly line; linea delle vendite, sales line; linee di spesa, expenditure lines; linea di credito credit line; linea di credito allo scoperto, open line; linea di credito stand-by, stand-by arrangement (o credit); linea reciproca di credito, (tra banche centrali) swap; linee di credito accordate, bank-lending commitments; linee di credito con emissione di titoli, backup facilities; ( Borsa) linea dei rialzi e dei ribassi, advance-decline line9 (di parentela) line: linea maschile, male line; discendente in linea diretta, direct descendant; discendere in linea diretta da, to descend in direct line from10 (di comunicazione) line: linea ferroviaria, railway line; linea della metropolitana, underground line; linea aerea, airline; linea di navigazione, (compagnia) shipping company; linea principale, secondaria, main, secondary line; la linea del tram, the tramline; la linea Roma-Milano è rimasta interrotta dalla frana, the Rome-Milan line has been blocked by the landslide; i treni ritardarono per lavori lungo la linea, the trains were delayed because of works along the track // nave di linea, liner; aeroplano di linea, airliner; volo di linea, scheduled flight // servizio di linea, regular (o scheduled) service11 (tecn.) (collegamento di impianto) line: linea elettrica, electric line; (elettr.) linea di raccordo, connecting line // (tel.): trovare la linea occupata, libera, to find the line engaged, free; prendere la linea, to get through; è caduta la linea!, the line has gone dead; prego attenda in linea, hold the line, please; la linea per Milano è guasta, the line to Milan is out of order; assistenza in linea, online assistance12 (tip.) line; (inform.) bar // (inform.): linea comune, condivisa, multipunto, party line; linea con numeri, digit row; linea superiore, top line; linea commutata, switched line.* * *['linea]sostantivo femminile1) (tratto) line (anche mat. sport)tirare o tracciare una linea to draw o rule a line; linea curva, spezzata curved, broken line; linea dell'orizzonte skyline; in linea retta in a straight line; in linea d'aria — as the crow flies
2) (di trasporti) line; (d'autobus) (bus) routelinea marittima, aerea — (compagnia) shipping line, airline; (rotta) sea, air route
3) el. (power) line, cable4) tel. line, connectionè caduta la linea — the line went dead, I was cut off, I've been disconnected
"resti in linea" — "hold the line o hold on, please"
prendere o ottenere la linea to get a connection, to get through; essere in linea con qcn. — to be on the line to sb
5) rad. telev. linepassare la linea a — to hand over to [inviato, studio]
6) (anche linea di montaggio) production line7) (silhouette) figure8) (contorno) line; (stile) line, style, look9) (gamma di prodotti) line10) (idea, punto)a grandi -e — broadly, in (broad) outline
in linea di massima — broadly (speaking), as a general rule
11) (orientamento) line, stancelinea politica — political line, policy
essere in linea — to be in line ( con with)
adottare la linea dura, morbida con qcn. — to take a tough, soft line with sb
12) mil. (fronte) lineessere in prima linea — to be in BE o on AE the front line, to be (first) in the firing line (anche fig.)
13) sport line14) (in genealogia) line15) (nei termometri)•linea d'arrivo — sport finishing line
linea d'attacco — sport mil. line of attack
linea di comunicazione — communication line, line of communication
linea di confine — borderline, boundary line
linea di fondo — sport (nel calcio) goal line; (nel tennis) baseline
linea di galleggiamento — mar. water line
linea laterale — sport sideline, by-line
linea di metà campo — sport halfway line
linea di partenza — sport starting line
linea di porta — sport goal line
linea telefonica — (tele)phone line o link
linea di tiro — mil. line of fire, firing line
••su tutta la linea — all along o right down the line
battere qcn. su tutta la linea — to beat sb. hollow
* * *linea/'linea/sostantivo f.1 (tratto) line (anche mat. sport); tirare o tracciare una linea to draw o rule a line; linea curva, spezzata curved, broken line; linea dell'orizzonte skyline; in linea retta in a straight line; in linea d'aria as the crow flies2 (di trasporti) line; (d'autobus) (bus) route; linea marittima, aerea (compagnia) shipping line, airline; (rotta) sea, air route; di linea [volo, pullman] scheduled; [ pilota] airline; aereo di linea airliner3 el. (power) line, cable4 tel. line, connection; è caduta la linea the line went dead, I was cut off, I've been disconnected; "resti in linea" "hold the line o hold on, please"; prendere o ottenere la linea to get a connection, to get through; essere in linea con qcn. to be on the line to sb.5 rad. telev. line; passare la linea a to hand over to [inviato, studio]6 (anche linea di montaggio) production line7 (silhouette) figure; riacquistare la linea to get back one's figure8 (contorno) line; (stile) line, style, look; una giacca di linea sportiva a jacket with a sport cut9 (gamma di prodotti) line10 (idea, punto) le -e essenziali del progetto the broad outline of the plan; a grandi -e broadly, in (broad) outline; in linea di massima broadly (speaking), as a general rule; in linea di principio in principle11 (orientamento) line, stance; linea d'azione course of action; linea politica political line, policy; essere in linea to be in line ( con with); adottare la linea dura, morbida con qcn. to take a tough, soft line with sb.12 mil. (fronte) line; essere in prima linea to be in BE o on AE the front line, to be (first) in the firing line (anche fig.)13 sport line; giudice di linea linesman14 (in genealogia) line; linea (di discendenza) maschile male line; in linea materna on one's mother's side15 (nei termometri) avere qualche linea di febbre to have a slight temperaturesu tutta la linea all along o right down the line; battere qcn. su tutta la linea to beat sb. hollow\linea d'arrivo sport finishing line; linea d'attacco sport mil. line of attack; linea di comunicazione communication line, line of communication; linea di condotta course of action; linea di confine borderline, boundary line; linea ferroviaria railway line; linea di fondo sport (nel calcio) goal line; (nel tennis) baseline; linea di galleggiamento mar. water line; linea laterale sport sideline, by-line; linea di metà campo sport halfway line; linea di partenza sport starting line; linea di porta sport goal line; linea telefonica (tele)phone line o link; linea di tiro mil. line of fire, firing line. -
22 Wöhler, August
SUBJECT AREA: Metallurgy[br]b. 22 June 1819 Soltau, Germanyd. 21 June 1914 Hannover, Germany[br]German railway engineer who first established the fatigue fracture of metals.[br]Wöhler, the son of a schoolteacher, was born at Soltau on the Luneburg Heath and received his early education at his father's school, where his mathematical abilities soon became apparent. He completed his studies at the Technical High School, Hannover.In 1840 he obtained a position at the Borsig Engineering Works in Berlin and acquired there much valuable experience in railway technology. He trained as an engine driver in Belgium and in 1843 was appointed as an engineer to the first Hannoverian Railway, then being constructed between Hannover and Lehrte. In 1847 he became Chief Superintendent of rolling stock on the Lower Silesian-Brandenhurg Railway, where his technical abilities influenced the Prussian Minister of Commerce to appoint him to a commission set up to investigate the reasons for the unusually high incidence of axle failures then being encountered on the railways. This was in 1852, and by 1854, when the Brandenburg line had been nationalized, Wöhler had already embarked on the long, systematic programme of mechanical testing which eventually provided him with a clear insight into the process of what is now referred to as "fatigue failure". He concentrated initially on the behaviour of machined iron and steel specimens subjected to fluctuating direct, bending and torsional stresses that were imposed by testing machines of his own design.Although Wöhler was not the first investigator in this area, he was the first to recognize the state of "fatigue" induced in metals by the repeated application of cycles of stress at levels well below those that would cause immediate failure. His method of plotting the fatigue stress amplitude "S" against the number of stress cycles necessary to cause failure "N" yielded the well-known S-N curve which described very precisely the susceptibility to fatigue failure of the material concerned. Engineers were thus provided with an invaluable testing technique that is still widely used in the 1990s.Between 1851 and 1898 Wöhler published forty-two papers in German technical journals, although the importance of his work was not initially fully appreciated in other countries. A display of some of his fracture fatigue specimens at the Paris Exposition in 1867, however, stimulated a short review of his work in Engineering in London. Four years later, in 1871, Engineering published a series of nine articles which described Wöhler's findings in considerable detail and brought them to the attention of engineers. Wöhler became a member of the newly created management board of the Imperial German Railways in 1874, an appointment that he retained until 1889. He is also remembered for his derivation in 1855 of a formula for calculating the deflections under load of lattice girders, plate girders, and other continuous beams resting on more than two supports. This "Three Moments" theorem appeared two years before Clapeyron independently advanced the same expression. Wöhler's other major contribution to bridge design was to use rollers at one end to allow for thermal expansion and contraction.[br]Bibliography1855, "Theorie rechteckiger eiserner Brückenbalken", Zeitschrift für Bauwesen 5:122–66. 1870, "Über die Festigkeitversuche mit Eisen und Stahl", Zeitschrift für Bauwesen 20:73– 106.Wöhler's experiments on the fatigue of metals were reported in Engineering (1867) 2:160; (1871) 11:199–200, 222, 243–4, 261, 299–300, 326–7, 349–50, 397, 439–41.Further ReadingR.Blaum, 1918, "August Wöhler", Beiträge zur Geschichte der Technik und Industrie 8:35–55.——1925, "August Wöhler", Deutsches biographisches Jahrbuch, Vol. I, Stuttgart, pp. 103–7.K.Pearson, 1890, "On Wöhler's experiments on alternating stress", Messeng. Math.20:21–37.J.Gilchrist, 1900, "On Wöhler's Laws", Engineer 90:203–4.ASD
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