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81 Babbage, Charles
SUBJECT AREA: Electronics and information technology[br]b. 26 December 1791 Walworth, Surrey, Englandd. 18 October 1871 London, England[br]English mathematician who invented the forerunner of the modern computer.[br]Charles Babbage was the son of a banker, Benjamin Babbage, and was a sickly child who had a rather haphazard education at private schools near Exeter and later at Enfield. Even as a child, he was inordinately fond of algebra, which he taught himself. He was conversant with several advanced mathematical texts, so by the time he entered Trinity College, Cambridge, in 1811, he was ahead of his tutors. In his third year he moved to Peterhouse, whence he graduated in 1814, taking his MA in 1817. He first contributed to the Philosophical Transactions of the Royal Society in 1815, and was elected a fellow of that body in 1816. He was one of the founders of the Astronomical Society in 1820 and served in high office in it.While he was still at Cambridge, in 1812, he had the first idea of calculating numerical tables by machinery. This was his first difference engine, which worked on the principle of repeatedly adding a common difference. He built a small model of an engine working on this principle between 1820 and 1822, and in July of the latter year he read an enthusiastically received note about it to the Astronomical Society. The following year he was awarded the Society's first gold medal. He submitted details of his invention to Sir Humphry Davy, President of the Royal Society; the Society reported favourably and the Government became interested, and following a meeting with the Chancellor of the Exchequer Babbage was awarded a grant of £1,500. Work proceeded and was carried on for four years under the direction of Joseph Clement.In 1827 Babbage went abroad for a year on medical advice. There he studied foreign workshops and factories, and in 1832 he published his observations in On the Economy of Machinery and Manufactures. While abroad, he received the news that he had been appointed Lucasian Professor of Mathematics at Cambridge University. He held the Chair until 1839, although he neither resided in College nor gave any lectures. For this he was paid between £80 and £90 a year! Differences arose between Babbage and Clement. Manufacture was moved from Clement's works in Lambeth, London, to new, fireproof buildings specially erected by the Government near Babbage's house in Dorset Square, London. Clement made a large claim for compensation and, when it was refused, withdrew his workers as well as all the special tools he had made up for the job. No work was possible for the next fifteen months, during which Babbage conceived the idea of his "analytical engine". He approached the Government with this, but it was not until eight years later, in 1842, that he received the reply that the expense was considered too great for further backing and that the Government was abandoning the project. This was in spite of the demonstration and perfectly satisfactory operation of a small section of the analytical engine at the International Exhibition of 1862. It is said that the demands made on manufacture in the production of his engines had an appreciable influence in improving the standard of machine tools, whilst similar benefits accrued from his development of a system of notation for the movements of machine elements. His opposition to street organ-grinders was a notable eccentricity; he estimated that a quarter of his mental effort was wasted by the effect of noise on his concentration.[br]Principal Honours and DistinctionsFRS 1816. Astronomical Society Gold Medal 1823.BibliographyBabbage wrote eighty works, including: 1864, Passages from the Life of a Philosopher.July 1822, Letter to Sir Humphry Davy, PRS, on the Application of Machinery to the purpose of calculating and printing Mathematical Tables.Further Reading1961, Charles Babbage and His Calculating Engines: Selected Writings by Charles Babbage and Others, eds Philip and Emily Morrison, New York: Dover Publications.IMcN -
82 Smeaton, John
SUBJECT AREA: Civil engineering, Mechanical, pneumatic and hydraulic engineering, Steam and internal combustion engines[br]b. 8 June 1724 Austhorpe, near Leeds, Yorkshire, Englandd. 28 October 1792 Austhorpe, near Leeds, Yorkshire, England[br]English mechanical and civil engineer.[br]As a boy, Smeaton showed mechanical ability, making for himself a number of tools and models. This practical skill was backed by a sound education, probably at Leeds Grammar School. At the age of 16 he entered his father's office; he seemed set to follow his father's profession in the law. In 1742 he went to London to continue his legal studies, but he preferred instead, with his father's reluctant permission, to set up as a scientific instrument maker and dealer and opened a shop of his own in 1748. About this time he began attending meetings of the Royal Society and presented several papers on instruments and mechanical subjects, being elected a Fellow in 1753. His interests were turning towards engineering but were informed by scientific principles grounded in careful and accurate observation.In 1755 the second Eddystone lighthouse, on a reef some 14 miles (23 km) off the English coast at Plymouth, was destroyed by fire. The President of the Royal Society was consulted as to a suitable engineer to undertake the task of constructing a new one, and he unhesitatingly suggested Smeaton. Work began in 1756 and was completed in three years to produce the first great wave-swept stone lighthouse. It was constructed of Portland stone blocks, shaped and pegged both together and to the base rock, and bonded by hydraulic cement, scientifically developed by Smeaton. It withstood the storms of the English Channel for over a century, but by 1876 erosion of the rock had weakened the structure and a replacement had to be built. The upper portion of Smeaton's lighthouse was re-erected on a suitable base on Plymouth Hoe, leaving the original base portion on the reef as a memorial to the engineer.The Eddystone lighthouse made Smeaton's reputation and from then on he was constantly in demand as a consultant in all kinds of engineering projects. He carried out a number himself, notably the 38 mile (61 km) long Forth and Clyde canal with thirty-nine locks, begun in 1768 but for financial reasons not completed until 1790. In 1774 he took charge of the Ramsgate Harbour works.On the mechanical side, Smeaton undertook a systematic study of water-and windmills, to determine the design and construction to achieve the greatest power output. This work issued forth as the paper "An experimental enquiry concerning the natural powers of water and wind to turn mills" and exerted a considerable influence on mill design during the early part of the Industrial Revolution. Between 1753 and 1790 Smeaton constructed no fewer than forty-four mills.Meanwhile, in 1756 he had returned to Austhorpe, which continued to be his home base for the rest of his life. In 1767, as a result of the disappointing performance of an engine he had been involved with at New River Head, Islington, London, Smeaton began his important study of the steam-engine. Smeaton was the first to apply scientific principles to the steam-engine and achieved the most notable improvements in its efficiency since its invention by Newcomen, until its radical overhaul by James Watt. To compare the performance of engines quantitatively, he introduced the concept of "duty", i.e. the weight of water that could be raised 1 ft (30 cm) while burning one bushel (84 lb or 38 kg) of coal. The first engine to embody his improvements was erected at Long Benton colliery in Northumberland in 1772, with a duty of 9.45 million pounds, compared to the best figure obtained previously of 7.44 million pounds. One source of heat loss he attributed to inaccurate boring of the cylinder, which he was able to improve through his close association with Carron Ironworks near Falkirk, Scotland.[br]Principal Honours and DistinctionsFRS 1753.Bibliography1759, "An experimental enquiry concerning the natural powers of water and wind to turn mills", Philosophical Transactions of the Royal Society.Towards the end of his life, Smeaton intended to write accounts of his many works but only completed A Narrative of the Eddystone Lighthouse, 1791, London.Further ReadingS.Smiles, 1874, Lives of the Engineers: Smeaton and Rennie, London. A.W.Skempton, (ed.), 1981, John Smeaton FRS, London: Thomas Telford. L.T.C.Rolt and J.S.Allen, 1977, The Steam Engine of Thomas Newcomen, 2nd edn, Hartington: Moorland Publishing, esp. pp. 108–18 (gives a good description of his work on the steam-engine).LRD -
83 term
[təːm]n1) срок, период, время, продолжительность- long-term agreementHis term of imprisonment runs out in two month. — Его срок заключения истекает через два месяца.
- life prison term
- term of office
- term of a loan
- extend the terms of payment
- be elected for a term of five years
- serve a short prison term2) семестр, учебная четверть, судебная сессия- three months termWe'll have no lectures next (this, for another) term. — У нас не будет лекций в следующем (в этом, еще в одном) семестре.
- six months term
- spring term
- first week of the term3) (только pl) условияWe cannot buy on terms mentioned. — Мы не можем купить на указанных условиях.
- exceptional termsIf I agree to sell it will be on my own terms. — Если я соглашусь продать это, то только на моих условиях.
- easy terms
- suitable terms
- acceptable terms
- unacceptable terms
- unfavorable terms
- usual terms
- reasonable terms
- moderate terms
- peace terms
- surrender terms
- credit terms
- payment terms
- discount terms
- terms of contract
- terms of repayment of credit
- on favourable terms
- on smb's terms
- according to the terms of the agreement
- on acceptable terms
- on easy terms
- sell smth at reasonable terms
- accept the terms of an agreement
- dictate one's own terms
- agree to President's terms
- study the terms offered closely
- clarify the terms
- come to terms with smb
- make terms with smb
- bring smb to terms
- offer better terms
- make better terms4) (только pl) отношенияWe're on calling (visiting) terms. — Мы в приятельских отношениях. /Мы бываем друг у друга дома.
We're on nodding terms. — У нас шапочное знакомство.
5) термин, выражение, названиеIt is not a fortunate term for smth — Это неудачное обозначение/название для чего-либо.
He knows all medical terms. — Он знает все медицинские термины.
- scientific term- bookish term
- every day term
- vulgar terms
- in terms of science
- in terms of our experience
- speak in general terms
- speak in vague terms
- speak of smb, smth in very flattering terms
- speak of smb in terms of respect
- express smth in terms of lines•USAGE: -
84 срок
м1) промежуток времени time, period (of), обусловленный termдвухле́тний срок — two-year period
кра́йний срок — the deadline
срок полномо́чий/пребыва́ния в до́лжности — term of office
на коро́ткий срок — for a short (period of) time
в тече́ние устано́вленного срока — within/in the agreed time
успе́ть сде́лать что-л к устано́вленному сроку — to meet the deadline
когда́ наста́л срок — when the time came
когда́ истечёт срок — when the time is up/has elapsed
президе́нт избира́ется на четырёхле́тний срок — the president is elected for a four-year term
2) прост тюремное заключение termсрок тюре́много заключе́ния — term of imprisonment
отбыва́ть срок — to do/to serve time/a term
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