Перевод: со всех языков на английский

с английского на все языки

sensitive subject

  • 1 hum. сокр. Sensitive To Antimicrobial Peptides

    General subject: SAP

    Универсальный русско-английский словарь > hum. сокр. Sensitive To Antimicrobial Peptides

  • 2 sensible

    sensible [sɑ̃sibl]
    adjective
       a. [personne] sensitive (à to)
       b. ( = significatif) noticeable
       c. [blessure, organe, peau] sensitive
    • sensible au chaud/froid sensitive to heat/cold
       d. ( = difficile) [dossier, projet, secteur] sensitive ; [établissement scolaire, quartier] problem
    • zone sensible ( = quartier) problem area ; (Military) sensitive area
       e. [balance, baromètre, marché] sensitive (à to)
    ━━━━━━━━━━━━━━━━━
    +1! sensible ne se traduit pas par le mot anglais sensible.
    * * *
    sɑ̃sibl
    1.
    1) gén sensitive

    les natures sensibles — pej the fainthearted

    2) [peau] sensitive; [peau cicatrisée] tender; [membre blessé] sore

    je suis sensible de la gorge, j'ai la gorge sensible — I often get a sore throat

    3) ( notable) [hausse, différence] appreciable; [effort] real

    le monde sensible — the physical ou tangible world


    2.
    nom masculin et féminin sensitive person
    * * *
    sɑ̃sibl adj
    1) (= émotif) sensitive

    Elle est très sensible. — She's very sensitive.

    Ce film est déconseillé aux personnes sensibles. — This film contains scenes which some viewers may find disturbing.

    2) (appareil, ouïe) sensitive
    3) (= délicat) sensitive
    4) (aux sens) perceptible
    5) (= appréciable) (différence, progrès) visible, noticeable
    * * *
    A adj
    1 ( non indifférent) [personne, nature] sensitive; être sensible aux compliments to like compliments; être sensible aux charmes de qn to be susceptible to sb's charms; j'ai été très sensible à votre gentille attention I was most touched by your kindness; je suis sensible au fait que I am aware that; avoir le cœur sensible to be sensitive; ce film est déconseillé aux personnes sensibles this film is not for the squeamish; être sensible à un argument to be swayed by an argument; les natures sensibles pej the fainthearted;
    2 ( qui perçoit) [organe, membrane, appareil, instrument] sensitive; avoir l'oreille sensible to have keen hearing; un être sensible a sentient being; être sensible au froid/à la lumière [membrane, appareil] to be sensitive to cold/to light; je suis très sensible au froid I really feel the cold; balance sensible au milligramme scale which is accurate to a milligram; marché sensible aux fluctuations économiques ( délicat) market sensitive to fluctuations in the economy;
    3 ( fragile) [peau] sensitive; ( un peu douloureux) [peau cicatrisée] tender; [membre blessé] sore; je suis sensible de la gorge, j'ai la gorge sensible I often get a sore throat; j'ai les pieds sensibles I have tender feet;
    4 ( notable) [recul, hausse, différence] appreciable; [effort] real; de manière sensible appreciably; la différence est à peine sensible the difference is hardly noticeable;
    5 Phot sensitive; sensible à la lumière photosensitive;
    6 ( délicat) [dossier, question, thème] sensitive;
    7 ( perceptible) le monde sensible the physical ou tangible world.
    B nmf sensitive person; c'est un grand sensible he's very sensitive.
    C nf Mus leading note.
    [sɑ̃sibl] adjectif
    1. [physiquement, émotivement] sensitive
    2. [peau, gencive] delicate, sensitive
    [balance, microphone] sensitive, responsive
    [direction de voiture] responsive
    3. [phénomène - perceptible] perceptible ; [ - notable] noticeable, marked, sensible (soutenu)
    hausse/baisse sensible marked rise/fall
    5. MUSIQUE [note] leading
    ————————
    [sɑ̃sibl] nom féminin

    Dictionnaire Français-Anglais > sensible

  • 3 деликатный вопрос

    2) Military: sensitive issue
    3) Politics: ticklish question
    4) Mass media: sensitive question

    Универсальный русско-английский словарь > деликатный вопрос

  • 4 ømtålelig

    * * *
    adj sensitive;
    [ et ømtåleligt emne] a tender subject;
    ( som rummer sikkerhedsrisiko) a sensitive subject;
    [ et ømtåleligt spørgsmål] a delicate question.

    Danish-English dictionary > ømtålelig

  • 5 soga

    f.
    rope.
    * * *
    1 rope, cord
    \
    dar soga a alguien (burlarse) to make fun of somebody 2 (llevarle la corriente) to humour (US humor) somebody
    estar con la soga al cuello figurado to be in dire straits
    * * *
    SF (=cuerda) [gen] rope, cord; [de animal] halter; [del verdugo] hangman's rope
    * * *
    femenino ( cuerda) rope
    * * *
    = rope.
    Ex. The second title may be indexed under: wire, rope, lubrication, corrosion, protection.
    ----
    * con la soga al cuello = in dire straits.
    * * *
    femenino ( cuerda) rope
    * * *
    = rope.

    Ex: The second title may be indexed under: wire, rope, lubrication, corrosion, protection.

    * con la soga al cuello = in dire straits.

    * * *
    1 (cuerda) rope
    estar con la soga al cuello to have one's back to the wall, be in a real fix ( colloq)
    2 ( Const) face
    colocados a soga laid in a stretcher bond
    * * *

    soga sustantivo femenino ( cuerda) rope
    soga sustantivo femenino rope
    ♦ Locuciones: estamos con la soga al cuello, we are in dire straits
    ' soga' also found in these entries:
    Spanish:
    cuerda
    - remolque
    - alargar
    - andarivel
    - estirar
    English:
    rope
    - noose
    - tether
    * * *
    soga nf
    [cuerda] rope; [para ahorcar] noose;
    estar con la soga al cuello to be in dire straits;
    mentar la soga en casa del ahorcado to really put one's foot in it [by mentioning a sensitive subject]
    * * *
    f rope;
    estar con la soga al cuello fam be in big trouble fam
    * * *
    soga nf
    : rope
    * * *
    soga n rope

    Spanish-English dictionary > soga

  • 6 dotykać

    (-am, -asz)

    perf; dotknąć; vt dotykać kogoś/czegoś — ( stykać się) to touch sb/sth; ( badać dotykiem) to feel sb/sth

    dotykać czegoś — (podłogi, pedałów) to reach sth; (tematu, sprawy) to touch on lub upon sth

    dotykać kogoś — (o chorobie, nieszczęściu) to afflict sb

    * * *
    ipf.
    1. (= zetknąć z ręką/palcem itp.) touch ( czegoś czymś sth with sth); (ręką t.) feel ( czegoś sth); dotknąć drażliwego tematu touch (up)on a sensitive subject; ludzka noga nie dotknęła tego miejsca no human has set foot in this place before; nawet nie dotknąłem tych pieniędzy I didn't even touch the money; nie dotykać! do not touch!
    2. (= urazić) hurt, upset; dotknąć kogoś do żywego cut sb to the quick.
    3. (= ciężko doświadczyć) (o chorobie, dolegliwości) afflict; (o podwyżce, recesji, redukcjach) hit.
    ipf.
    be touching, touch; czego się dotknął, robił to doskonale he excelled at whatever he did; niczego się nie dotknę I won't lift l. raise a finger.

    The New English-Polish, Polish-English Kościuszko foundation dictionary > dotykać

  • 7 to|r1

    m (G toru) 1. (trajektoria) path
    - tor pocisku trajectory
    - tor planetoidy asteroid a. planetoid circuit
    2. Kolej., Transp. track, railway
    - tor kolejowy/tramwajowy railway track/tram line
    - pociąg wjedzie na tor drugi przy peronie czwartym the train comes in on track number two, on platform four
    - ślepy tor lay-by; przen. (sytuacja bez wyjścia) dead end, deadlock
    - utknąć na ślepym torze to come to a dead end
    3. Sport (kajakowy, slalomowy) course; (bobslejowy, saneczkowy,) run; (kręglarski) alley, rink; (kolarski, motocyklowy) (race)track; (łyżwiarski) rink
    - sprinter biegł po zewnętrznym torze the sprinter ran in the outside track
    4. przen. trudno śledzić tor jego myśli it’s difficult to follow his train of thought
    - przestawić się na inny tor myślenia to switch to another line of thought
    - □ tor bezstykowy Kolej. continuous welded rail
    - tor elektroakustyczny Fiz. electroacoustic channel
    - tor przeszkód Sport obstacle course
    - tor wodny Żegl. fairway
    - tor wyścigowy Sport racecourse GB, racetrack US; (samochodowy) racetrack GB, raceway US; (motocyklowy) speedway (track)
    - tor żużlowy Sport cinder track
    ■ toczyć się swoim a. utartym torem książk. to take a. run its (normal) course
    - przestawić a. naprowadzić coś na inne tory książk. to approach sth in a different way
    - wkraczać na śliskie tory książk. to bring up a. touch upon a sensitive subject

    The New English-Polish, Polish-English Kościuszko foundation dictionary > to|r1

  • 8 тема тем·а

    subject, theme; (разговора) topic; (разговора, исследования, спора) ground

    детально / тщательно разрабатывать тему — to elaborate a theme

    отклоняться от темы — to deviate from the theme, to go off the track, to stray from the subject

    деликатная / щекотливая тема — delicate / sensitive ground / subject

    злободневная тема — topic of the day, topical subject

    наиболее актуальная / важная тема — topic А

    тема статьи — theme / topic of an article

    Russian-english dctionary of diplomacy > тема тем·а

  • 9 Baekeland, Leo Hendrik

    [br]
    b. 14 November 1863 Saint-Martens-Latern, Belgium
    d. 23 February 1944 Beacon, New York, USA
    [br]
    Belgian/American inventor of the Velox photographic process and the synthetic plastic Bakélite.
    [br]
    The son of an illiterate shoemaker, Baekeland was first apprenticed in that trade, but was encouraged by his mother to study, with spectacular results. He won a scholarship to Gand University and graduated in chemistry. Before he was 21 he had achieved his doctorate, and soon afterwards he obtained professorships at Bruges and then at Gand. Baekeland seemed set for a distinguished academic career, but he turned towards the industrial applications of chemistry, especially in photography.
    Baekeland travelled to New York to further this interest, but his first inventions met with little success so he decided to concentrate on one that seemed to have distinct commercial possibilities. This was a photographic paper that could be developed in artificial light; he called this "gas light" paper Velox, using the less sensitive silver chloride as a light-sensitive agent. It proved to have good properties and was easy to use, at a time of photography's rising popularity. By 1896 the process began to be profitable, and three years later Baekeland disposed of his plant to Eastman Kodak for a handsome sum, said to be $3–4 million. That enabled him to retire from business and set up a laboratory at Yonkers to pursue his own research, including on synthetic resins. Several chemists had earlier obtained resinous products from the reaction between phenol and formaldehyde but had ignored them. By 1907 Baekeland had achieved sufficient control over the reaction to obtain a good thermosetting resin which he called "Bakélite". It showed good electrical insulation and resistance to chemicals, and was unchanged by heat. It could be moulded while plastic and would then set hard on heating, with its only drawback being its brittleness. Bakelite was an immediate success in the electrical industry and Baekeland set up the General Bakelite Company in 1910 to manufacture and market the product. The firm grew steadily, becoming the Bakélite Corporation in 1924, with Baekeland still as active President.
    [br]
    Principal Honours and Distinctions
    President, Electrochemical Society 1909. President, American Chemical Society 1924. Elected to the National Academy of Sciences 1936.
    Further Reading
    J.Gillis, 1965, Leo Baekeland, Brussels.
    A.R.Matthis, 1948, Leo H.Baekeland, Professeur, Docteur ès Sciences, chimiste, inventeur et grand industriel, Brussels.
    J.K.Mumford, 1924, The Story of Bakélite.
    C.F.Kettering, 1947, memoir on Baekeland, Biographical Memoirs of the National Academy of Sciences 24 (includes a list of his honours and publications).
    LRD

    Biographical history of technology > Baekeland, Leo Hendrik

  • 10 Carlson, Chester Floyd

    [br]
    b. 8 July 1906 Seattle, Washington, USA
    d. 19 September 1968 New York, USA
    [br]
    [br]
    Carlson studied physics at the California Institute of Technology and in 1930 he took a research position at Bell Telephone Laboratories, but soon transferred to their patent department. To equip himself in this field, Carlson studied law, and in 1934 he became a patent attorney at P.R.Mallory \& Co., makers of electrical apparatus. He was struck by the difficulty in obtaining copies of documents and drawings; indeed, while still at school, he had encountered printing problems in trying to produce a newsletter for amateur chemists. He began experimenting with various light-sensitive substances, and by 1937 he had conceived the basic principles of xerography ("dry writing"), using the property of certain substances of losing an electrostatic charge when light impinges on them. His work for Mallory brought him into contact with the Battelle Memorial Institute, the world's largest non-profit research organization; their subsidiary, set up to develop promising ideas, took up Carlson's invention. Carlson received his first US patent for the process in 1940, with two more in 1942, and he assigned to Battelle exclusive patent rights in return for a share of any future proceeds. It was at Battelle that selenium was substituted as the light-sensitive material.
    In 1946 the Haloid Company of Rochester, manufacturers of photographic materials and photocopying equipment, heard of the Xerox copier and, seeing it as a possible addition to their products, took out a licence to develop it commercially. The first Xerox Copier was tested during 1949 and put on the market the following year. The process soon began to displace older methods, such as Photostat, but its full impact on the public came in 1959 with the advent of the Xerox 914 Copier. It is fair to apply the overworked word "revolution" to the change in copying methods initiated by Carlson. He became a multimillionaire from his royalties and stock holding, and in his last years he was able to indulge in philanthropic activities.
    [br]
    Further Reading
    Obituary, 1968, New York Times, 20 September.
    R.M.Schaffert, 1954, "Developments in xerography", Penrose Annual.
    J.Jewkes, 1969, The Sources of Invention, 2nd edn, London: Macmillan, pp. 405–8.
    LRD

    Biographical history of technology > Carlson, Chester Floyd

  • 11 Sutton, Thomas

    [br]
    b. 1819 England
    d. 1875 Jersey, Channel Islands
    [br]
    English photographer and writer on photography.
    [br]
    In 1841, while studying at Cambridge, Sutton became interested in photography and tried out the current processes, daguerreotype, calotype and cyanotype among them. He subsequently settled in Jersey, where he continued his photographic studies. In 1855 he opened a photographic printing works in Jersey, in partnership with L.-D. Blanquart- Evrard, exploiting the latter's process for producing developed positive prints. He started and edited one of the first photographic periodicals, Photographic Notes, in 1856; until its cessation in 1867, his journal presented a fresher view of the world of photography than that given by its London-based rivals. He also drew up the first dictionary of photography in 1858.
    In 1859 Sutton designed and patented a wideangle lens in which the space between two meniscus lenses, forming parts of a sphere and sealed in a metal rim, was filled with water; the lens so formed could cover an angle of up to 120 degrees at an aperture of f12. Sutton's design was inspired by observing the images produced by the water-filled sphere of a "snowstorm" souvenir brought home from Paris! Sutton commissioned the London camera-maker Frederick Cox to make the Panoramic camera, demonstrating the first model in January 1860; it took panoramic pictures on curved glass plates 152×381 mm in size. Cox later advertised other models in a total of four sizes. In January 1861 Sutton handed over manufacture to Andrew Ross's son Thomas Ross, who produced much-improved lenses and also cameras in three sizes. Sutton then developed the first single-lens reflex camera design, patenting it on 20 August 1961: a pivoted mirror, placed at 45 degrees inside the camera, reflected the image from the lens onto a ground glass-screen set in the top of the camera for framing and focusing. When ready, the mirror was swung up out of the way to allow light to reach the plate at the back of the camera. The design was manufactured for a few years by Thomas Ross and J.H. Dallmeyer.
    In 1861 James Clerk Maxwell asked Sutton to prepare a series of photographs for use in his lecture "On the theory of three primary colours", to be presented at the Royal Institution in London on 17 May 1861. Maxwell required three photographs to be taken through red, green and blue filters, which were to be printed as lantern slides and projected in superimposition through three projectors. If his theory was correct, a colour reproduction of the original subject would be produced. Sutton used liquid filters: ammoniacal copper sulphate for blue, copper chloride for the green and iron sulphocyanide for the red. A fourth exposure was made through lemon-yellow glass, but was not used in the final demonstration. A tartan ribbon in a bow was used as the subject; the wet-collodion process in current use required six seconds for the blue exposure, about twice what would have been needed without the filter. After twelve minutes no trace of image was produced through the green filter, which had to be diluted to a pale green: a twelve-minute exposure then produced a serviceable negative. Eight minutes was enough to record an image through the red filter, although since the process was sensitive only to blue light, nothing at all should have been recorded. In 1961, R.M.Evans of the Kodak Research Laboratory showed that the red liquid transmitted ultraviolet radiation, and by an extraordinary coincidence many natural red dye-stuffs reflect ultraviolet. Thus the red separation was made on the basis of non-visible radiation rather than red, but the net result was correct and the projected images did give an identifiable reproduction of the original. Sutton's photographs enabled Maxwell to establish the validity of his theory and to provide the basis upon which all subsequent methods of colour photography have been founded.
    JW / BC

    Biographical history of technology > Sutton, Thomas

  • 12 Waterhouse, Major-General James

    [br]
    b. 1841
    d. 28 September 1922
    [br]
    English military man and photographer.
    [br]
    Waterhouse spent most of his career in the Indian Army. In 1861–2 he was commissioned to photograph the tribes of central India, and over the next few years visited many parts of the subcontinent. In November 1866, after working for five months in the Great Trigonometrical Survey learning the process of photozincography (an early photomechanical process used chiefly for map making), he took charge of photographic operations at the Surveyor-General's office in Calcutta, a post he held until retiring in 1897. During this time he developed many improvements in the photomechanical methods used for reproduction in his office. He also experimented with methods of colour-sensitizing photographic materials, experimenting with eosine dye and publishing in 1875 the fact that this made silver halide salts sensitive to yellow light. He also discovered that gelatine dry plates could be made sensitive to red and infra-red illumination by treatment with alizarine blue solution.
    He continued his researches upon his retirement and return to England in 1897, and made a special study of the early history of the photographic process. His work on dye sensitizing brought him the Progress Medal of the Royal Photographic Society, and the Vienna Photographic Society awarded him the Voigtländer Medal for researches in scientific photography. One invention often erroneously attributed to him is the Waterhouse stop, the use of a series of perforated plates as a means of adjusting the aperture of a photographic lens. This was described in 1858 by a John Waterhouse, being his only contribution to photography.
    BC

    Biographical history of technology > Waterhouse, Major-General James

  • 13 Swan, Sir Joseph Wilson

    [br]
    b. 31 October 1828 Sunderland, England
    d. 27 May 1914 Warlingham, Surrey, England
    [br]
    English chemist, inventor in Britain of the incandescent electric lamp and of photographic processes.
    [br]
    At the age of 14 Swan was apprenticed to a Sunderland firm of druggists, later joining John Mawson who had opened a pharmacy in Newcastle. While in Sunderland Swan attended lectures at the Athenaeum, at one of which W.E. Staite exhibited electric-arc and incandescent lighting. The impression made on Swan prompted him to conduct experiments that led to his demonstration of a practical working lamp in 1879. As early as 1848 he was experimenting with carbon as a lamp filament, and by 1869 he had mounted a strip of carbon in a vessel exhausted of air as completely as was then possible; however, because of residual air, the filament quickly failed.
    Discouraged by the cost of current from primary batteries and the difficulty of achieving a good vacuum, Swan began to devote much of his attention to photography. With Mawson's support the pharmacy was expanded to include a photographic business. Swan's interest in making permanent photographic records led him to patent the carbon process in 1864 and he discovered how to make a sensitive dry plate in place of the inconvenient wet collodian process hitherto in use. He followed this success with the invention of bromide paper, the subject of a British patent in 1879.
    Swan resumed his interest in electric lighting. Sprengel's invention of the mercury pump in 1865 provided Swan with the means of obtaining the high vacuum he needed to produce a satisfactory lamp. Swan adopted a technique which was to become an essential feature in vacuum physics: continuing to heat the filament during the exhaustion process allowed the removal of absorbed gases. The inventions of Gramme, Siemens and Brush provided the source of electrical power at reasonable cost needed to make the incandescent lamp of practical service. Swan exhibited his lamp at a meeting in December 1878 of the Newcastle Chemical Society and again the following year before an audience of 700 at the Newcastle Literary and Philosophical Society. Swan's failure to patent his invention immediately was a tactical error as in November 1879 Edison was granted a British patent for his original lamp, which, however, did not go into production. Parchmentized thread was used in Swan's first commercial lamps, a material soon superseded by the regenerated cellulose filament that he developed. The cellulose filament was made by extruding a solution of nitro-cellulose in acetic acid through a die under pressure into a coagulating fluid, and was used until the ultimate obsolescence of the carbon-filament lamp. Regenerated cellulose became the first synthetic fibre, the further development and exploitation of which he left to others, the patent rights for the process being sold to Courtaulds.
    Swan also devised a modification of Planté's secondary battery in which the active material was compressed into a cellular lead plate. This has remained the central principle of all improvements in secondary cells, greatly increasing the storage capacity for a given weight.
    [br]
    Principal Honours and Distinctions
    Knighted 1904. FRS 1894. President, Institution of Electrical Engineers 1898. First President, Faraday Society 1904. Royal Society Hughes Medal 1904. Chevalier de la Légion d'Honneur 1881.
    Bibliography
    2 January 1880, British patent no. 18 (incandescent electric lamp).
    24 May 1881, British patent no. 2,272 (improved plates for the Planté cell).
    1898, "The rise and progress of the electrochemical industries", Journal of the Institution of Electrical Engineers 27:8–33 (Swan's Presidential Address to the Institution of Electrical Engineers).
    Further Reading
    M.E.Swan and K.R.Swan, 1968, Sir Joseph Wilson Swan F.R.S., Newcastle upon Tyne (a detailed account).
    R.C.Chirnside, 1979, "Sir Joseph Swan and the invention of the electric lamp", IEE
    Electronics and Power 25:96–100 (a short, authoritative biography).
    GW

    Biographical history of technology > Swan, Sir Joseph Wilson

  • 14 Alexanderson, Ernst Frederik Werner

    [br]
    b. 25 January 1878 Uppsala, Sweden
    d. ? May 1975 Schenectady, New York, USA
    [br]
    Swedish-American electrical engineer and prolific radio and television inventor responsible for developing a high-frequency alternator for generating radio waves.
    [br]
    After education in Sweden at the High School and University of Lund and the Royal Institution of Technology in Stockholm, Alexanderson took a postgraduate course at the Berlin-Charlottenburg Engineering College. In 1901 he began work for the Swedish C \& C Electric Company, joining the General Electric Company, Schenectady, New York, the following year. There, in 1906, together with Fessenden, he developed a series of high-power, high-frequency alternators, which had a dramatic effect on radio communications and resulted in the first real radio broadcast. His early interest in television led to working demonstrations in his own home in 1925 and at the General Electric laboratories in 1927, and to the first public demonstration of large-screen (7 ft (2.13 m) diagonal) projection TV in 1930. Another invention of significance was the "amplidyne", a sensitive manufacturing-control system subsequently used during the Second World War for controlling anti-aircraft guns. He also contributed to developments in electric propulsion and radio aerials.
    He retired from General Electric in 1948, but continued television research as a consultant for the Radio Corporation of America (RCA), filing his 321st patent in 1955.
    [br]
    Principal Honours and Distinctions
    Institution of Radio Engineers Medal of Honour 1919. President, IERE 1921. Edison Medal 1944.
    Bibliography
    Publications relating to his work in the early days of radio include: "Magnetic properties of iron at frequencies up to 200,000 cycles", Transactions of the American Institute of Electrical Engineers (1911) 30: 2,443.
    "Transatlantic radio communication", Transactions of the American Institute of Electrical
    Engineers (1919) 38:1,269.
    The amplidyne is described in E.Alexanderson, M.Edwards and K.Boura, 1940, "Dynamo-electric amplifier for power control", Transactions of the American
    Institution of Electrical Engineers 59:937.
    Further Reading
    E.Hawkes, 1927, Pioneers of Wireless, Methuen (provides an account of Alexanderson's work on radio).
    J.H.Udelson, 1982, The Great Television Race: A History of the American Television Industry 1925–1941, University of Alabama Press (provides further details of his contribution to the development of television).
    KF

    Biographical history of technology > Alexanderson, Ernst Frederik Werner

  • 15 Archer, Frederick Scott

    [br]
    b. 1813 Bishops Stortford, Hertfordshire, England
    d. May 1857 London, England
    [br]
    English photographer, inventor of the wet-collodion process, the dominant photographic process between 1851 and c.1880.
    [br]
    Apprenticed to a silversmith in London, Archer's interest in coin design and sculpture led to his taking up photography in 1847. Archer began experiments to improve Talbot's calotype process and by 1848 he was investigating the properties of a newly discovered material, collodion, a solution of gun-cotton in ether. In 1851 Archer published details of a process using collodion on glass plates as a carrier for silver salts. The process combined the virtues of both the calotype and the daguerreotype processes, then widely practised, and soon displaced them from favour. Collodion plates were only sensitive when moist and it was therefore essential to use them immediately after they had been prepared. Popularly known as "wet plate" photography, it became the dominant photographic process for thirty years.
    Archer introduced other minor photographic innovations and in 1855 patented a collodion stripping film. He had not patented the wet-plate process, however, and made no financial gain from his photographic work. He died in poverty in 1857, a matter of some embarrassment to his contemporaries. A subscription fund was raised, to which the Government was subsequently persuaded to add an annual pension.
    [br]
    Bibliography
    1851, Chemist (March) (announced Archer's process).
    Further Reading
    J.Werge, 1890, The Evolution of Photography.
    H.Gernsheim and A.Gernsheim, 1969, The History of "Photography", rev. edn, London.
    JW

    Biographical history of technology > Archer, Frederick Scott

  • 16 Bewick, Thomas

    SUBJECT AREA: Paper and printing
    [br]
    b. August 1753 Cherryburn House, Ovingham, Northumberland, England
    d. 8 November 1828 Gateshead, England
    [br]
    English perfecter of wood-engraving.
    [br]
    The son of a farmer, Bewick was educated locally, but his progress was unremarkable save for demonstrating an intense love of nature and of drawing. In 1767 he was apprenticed to Ralph Beilby, an engraver in Newcastle. Wood-engraving at that time was at a low ebb, restricted largely to crude decorative devices, and Hogarth, commenting on a recent book on the art, doubted whether it would ever recover. Beilby's business was of a miscellaneous character, but Bewick's interest in wood-engraving was noticed and encouraged: Beilby submitted several of his engravings to the Royal Society of Arts, which awarded a premium of £80 for them. His apprenticeship ended in 1774 and he went to London, where he readily found employment with several printers. The call of the north was too strong, however, and two years later he returned to Newcastle, entering into partnership with Beilby. With the publication of Select Fables in 1784, Bewick really showed both his expertise in the art of wood-engraving as a medium for book illustration and his talents as an artist. His engravings for the History of British Birds mark the high point of his achievement. The second volume of this work appeared in 1804, the year in which his partnership with Beilby was dissolved.
    The essential feature of Bewick's wood-engravings involved cutting across the grain of the wood instead of along it, as in the old woodcut technique. The wood surface thus obtained offered a much more sensitive medium for engraving than before. It paved the way for the flowering of engraving on wood, and then on steel, for the production of illustrated material for an ever wider public through the Victorian age.
    [br]
    Bibliography
    1864, Memoir of Thomas Bewick (autobiography, completed by his daughter). 1784, Select Fables.
    Further Reading
    M.Weekley, 1963, Thomas Bewick, Oxford: Oxford University Press.
    LRD

    Biographical history of technology > Bewick, Thomas

  • 17 Charpy, Augustin Georges Albert

    SUBJECT AREA: Metallurgy
    [br]
    b. 1 September 1865 Ouillins, Rhône, France
    d. 25 November 1945 Paris, France
    [br]
    French metallurgist, originator of the Charpy pendulum impact method of testing metals.
    [br]
    After graduating in chemistry from the Ecole Polytechnique in 1887, Charpy continued to work there on the physical chemistry of solutions for his doctorate. He joined the Laboratoire d'Artillerie de la Marine in 1892 and began to study the structure and mechanical properties of various steels in relation to their previous heat treatment. His first memoir, on the mechanical properties of steels quenched from various temperatures, was published in 1892 on the advice of Henri Le Chatelier. He joined the Compagnie de Chatillon Commentry Fourchamboult et Decazeville at their steelworks in Imphy in 1898, shortly after the discovery of Invar by G.E. Guillaume. Most of the alloys required for this investigation had been prepared at Imphy, and their laboratories were therefore well equipped with sensitive and refined dilatometric facilities. Charpy and his colleague L.Grenet utilized this technique in many of their earlier investigations, which were largely concerned with the transformation points of steel. He began to study the magnetic characteristics of silicon steels in 1902, shortly after their use as transformer laminations had first been proposed by Hadfield and his colleagues in 1900. Charpy was the first to show that the magnetic hysteresis of these alloys decreased rapidly as their grain size increased.
    The first details of Charpy's pendulum impact testing machine were published in 1901, about two years before Izod read his paper to the British Association. As with Izod's machine, the energy of fracture was measured by the retardation of the pendulum. Charpy's test pieces, however, unlike those of Izod, were in the form of centrally notched beams, freely supported at each end against rigid anvils. This arrangement, it was believed, transmitted less energy to the frame of the machine and allowed the energy of fracture to be more accurately measured. In practice, however, the blow of the pendulum in the Charpy test caused visible distortion in the specimen as a whole. Both tests were still widely used in the 1990s.
    In 1920 Charpy left Imphy to become Director-General of the Compagnie des Aciéries de la Marine et Homecourt. After his election to the Académie des Sciences in 1918, he came to be associated with Floris Osmond and Henri Le Chatelier as one of the founders of the "French School of Physical Metallurgy". Around the turn of the century he had contributed much to the development of the metallurgical microscope and had helped to introduce the Chatelier thermocouple into the laboratory and to industry. He also popularized the use of platinum-wound resistance furnaces for laboratory purposes. After 1920 his industrial responsibilities increased greatly, although he continued to devote much of his time to teaching at the Ecole Supérieure des Mines in Paris, and at the Ecole Polytechnique. His first book, Leçons de Chimie (1892, Paris), was written at the beginning of his career, in association with H.Gautier. His last, Notions élémentaires de sidérurgie (1946, Paris), with P.Pingault as co-author, was published posthumously.
    [br]
    Bibliography
    Charpy published important metallurgical papers in Comptes rendus… Académie des Sciences, Paris.
    Further Reading
    R.Barthélémy, 1947, "Notice sur la vie et l'oeuvre de Georges Charpy", Notices et discours, Académie des Sciences, Paris (June).
    M.Caullery, 1945, "Annonce du décès de M.G. Charpy" Comptes rendus Académie des Sciences, Paris 221:677.
    P.G.Bastien, 1963, "Microscopic metallurgy in France prior to 1920", Sorby Centennial Symposium on the History of Metallurgy, AIME Metallurgical Society Conference Vol.27, pp. 171–88.
    ASD

    Biographical history of technology > Charpy, Augustin Georges Albert

  • 18 Ducos du Hauron, Arthur-Louis

    [br]
    b. 1837 Langon, Bordeaux, France
    d. 19 August 1920 Agen, France
    [br]
    French scientist and pioneer of colour photography.
    [br]
    The son of a tax collector, Ducos du Hauron began researches into colour photography soon after the publication of Clerk Maxwell's experiment in 1861. In a communication sent in 1862 for presentation at the Académie des Sciences, but which was never read, he outlined a number of methods for photography of colours. Subsequently, in his book Les Couleurs en photographie, published in 1869, he outlined most of the principles of additive and subtractive colour photography that were later actually used. He covered additive processes, developed from Clerk Maxwell's demonstrations, and subtractive processes which could yield prints. At the time, the photographic materials available prevented the processes from being employed effectively. The design of his Chromoscope, in which transparent reflectors could be used to superimpose three additive images, was sound, however, and formed the basis of a number of later devices. He also proposed an additive system based on the use of a screen of fine red, yellow and blue lines, through which the photograph was taken and viewed. The lines blended additively when seen from a certain distance. Many years later, in 1907, Ducos du Hauron was to use this principle in an early commercial screen-plate process, Omnicolore. With his brother Alcide, he published a further work in 1878, Photographie des Couleurs, which described some more-practical subtractive processes. A few prints made at this time still survive and they are remarkably good for the period. In a French patent of 1895 he described yet another method for colour photography. His "polyfolium chromodialytique" involved a multiple-layer package of separate red-, green-and blue-sensitive materials and filters, which with a single exposure would analyse the scene in terms of the three primary colours. The individual layers would be separated for subsequent processing and printing. In a refined form, this is the principle behind modern colour films. In 1891 he patented and demonstrated the anaglyph method of stereoscopy, using superimposed red and green left and right eye images viewed through green and red filters. Ducos du Hauron's remarkable achievement was to propose theories of virtually all the basic methods of colour photography at a time when photographic materials were not adequate for the purpose of proving them correct. For his work on colour photography he was awarded the Progress Medal of the Royal Photographic Society in 1900, but despite his major contributions to colour photography he remained in poverty for much of his later life.
    [br]
    Further Reading
    B.Coe, 1978, Colour Photography: The First Hundred Years, London. J.S.Friedman, 1944, History of Colour Photography, Boston. E.J.Wall, 1925, The History of Three-Colour Photography, Boston. See also Cros, Charles.
    BC

    Biographical history of technology > Ducos du Hauron, Arthur-Louis

  • 19 Edison, Thomas Alva

    [br]
    b. 11 February 1847 Milan, Ohio, USA
    d. 18 October 1931 Glenmont
    [br]
    American inventor and pioneer electrical developer.
    [br]
    He was the son of Samuel Edison, who was in the timber business. His schooling was delayed due to scarlet fever until 1855, when he was 8½ years old, but he was an avid reader. By the age of 14 he had a job as a newsboy on the railway from Port Huron to Detroit, a distance of sixty-three miles (101 km). He worked a fourteen-hour day with a stopover of five hours, which he spent in the Detroit Free Library. He also sold sweets on the train and, later, fruit and vegetables, and was soon making a profit of $20 a week. He then started two stores in Port Huron and used a spare freight car as a laboratory. He added a hand-printing press to produce 400 copies weekly of The Grand Trunk Herald, most of which he compiled and edited himself. He set himself to learn telegraphy from the station agent at Mount Clements, whose son he had saved from being run over by a freight car.
    At the age of 16 he became a telegraphist at Port Huron. In 1863 he became railway telegraphist at the busy Stratford Junction of the Grand Trunk Railroad, arranging a clock with a notched wheel to give the hourly signal which was to prove that he was awake and at his post! He left hurriedly after failing to hold a train which was nearly involved in a head-on collision. He usually worked the night shift, allowing himself time for experiments during the day. His first invention was an arrangement of two Morse registers so that a high-speed input could be decoded at a slower speed. Moving from place to place he held many positions as a telegraphist. In Boston he invented an automatic vote recorder for Congress and patented it, but the idea was rejected. This was the first of a total of 1180 patents that he was to take out during his lifetime. After six years he resigned from the Western Union Company to devote all his time to invention, his next idea being an improved ticker-tape machine for stockbrokers. He developed a duplex telegraphy system, but this was turned down by the Western Union Company. He then moved to New York.
    Edison found accommodation in the battery room of Law's Gold Reporting Company, sleeping in the cellar, and there his repair of a broken transmitter marked him as someone of special talents. His superior soon resigned, and he was promoted with a salary of $300 a month. Western Union paid him $40,000 for the sole rights on future improvements on the duplex telegraph, and he moved to Ward Street, Newark, New Jersey, where he employed a gathering of specialist engineers. Within a year, he married one of his employees, Mary Stilwell, when she was only 16: a daughter, Marion, was born in 1872, and two sons, Thomas and William, in 1876 and 1879, respectively.
    He continued to work on the automatic telegraph, a device to send out messages faster than they could be tapped out by hand: that is, over fifty words per minute or so. An earlier machine by Alexander Bain worked at up to 400 words per minute, but was not good over long distances. Edison agreed to work on improving this feature of Bain's machine for the Automatic Telegraph Company (ATC) for $40,000. He improved it to a working speed of 500 words per minute and ran a test between Washington and New York. Hoping to sell their equipment to the Post Office in Britain, ATC sent Edison to England in 1873 to negotiate. A 500-word message was to be sent from Liverpool to London every half-hour for six hours, followed by tests on 2,200 miles (3,540 km) of cable at Greenwich. Only confused results were obtained due to induction in the cable, which lay coiled in a water tank. Edison returned to New York, where he worked on his quadruplex telegraph system, tests of which proved a success between New York and Albany in December 1874. Unfortunately, simultaneous negotiation with Western Union and ATC resulted in a lawsuit.
    Alexander Graham Bell was granted a patent for a telephone in March 1876 while Edison was still working on the same idea. His improvements allowed the device to operate over a distance of hundreds of miles instead of only a few miles. Tests were carried out over the 106 miles (170 km) between New York and Philadelphia. Edison applied for a patent on the carbon-button transmitter in April 1877, Western Union agreeing to pay him $6,000 a year for the seventeen-year duration of the patent. In these years he was also working on the development of the electric lamp and on a duplicating machine which would make up to 3,000 copies from a stencil. In 1876–7 he moved from Newark to Menlo Park, twenty-four miles (39 km) from New York on the Pennsylvania Railway, near Elizabeth. He had bought a house there around which he built the premises that would become his "inventions factory". It was there that he began the use of his 200- page pocket notebooks, each of which lasted him about two weeks, so prolific were his ideas. When he died he left 3,400 of them filled with notes and sketches.
    Late in 1877 he applied for a patent for a phonograph which was granted on 19 February 1878, and by the end of the year he had formed a company to manufacture this totally new product. At the time, Edison saw the device primarily as a business aid rather than for entertainment, rather as a dictating machine. In August 1878 he was granted a British patent. In July 1878 he tried to measure the heat from the solar corona at a solar eclipse viewed from Rawlins, Wyoming, but his "tasimeter" was too sensitive.
    Probably his greatest achievement was "The Subdivision of the Electric Light" or the "glow bulb". He tried many materials for the filament before settling on carbon. He gave a demonstration of electric light by lighting up Menlo Park and inviting the public. Edison was, of course, faced with the problem of inventing and producing all the ancillaries which go to make up the electrical system of generation and distribution-meters, fuses, insulation, switches, cabling—even generators had to be designed and built; everything was new. He started a number of manufacturing companies to produce the various components needed.
    In 1881 he built the world's largest generator, which weighed 27 tons, to light 1,200 lamps at the Paris Exhibition. It was later moved to England to be used in the world's first central power station with steam engine drive at Holborn Viaduct, London. In September 1882 he started up his Pearl Street Generating Station in New York, which led to a worldwide increase in the application of electric power, particularly for lighting. At the same time as these developments, he built a 1,300yd (1,190m) electric railway at Menlo Park.
    On 9 August 1884 his wife died of typhoid. Using his telegraphic skills, he proposed to 19-year-old Mina Miller in Morse code while in the company of others on a train. He married her in February 1885 before buying a new house and estate at West Orange, New Jersey, building a new laboratory not far away in the Orange Valley.
    Edison used direct current which was limited to around 250 volts. Alternating current was largely developed by George Westinghouse and Nicola Tesla, using transformers to step up the current to a higher voltage for long-distance transmission. The use of AC gradually overtook the Edison DC system.
    In autumn 1888 he patented a form of cinephotography, the kinetoscope, obtaining film-stock from George Eastman. In 1893 he set up the first film studio, which was pivoted so as to catch the sun, with a hinged roof which could be raised. In 1894 kinetoscope parlours with "peep shows" were starting up in cities all over America. Competition came from the Latham Brothers with a screen-projection machine, which Edison answered with his "Vitascope", shown in New York in 1896. This showed pictures with accompanying sound, but there was some difficulty with synchronization. Edison also experimented with captions at this early date.
    In 1880 he filed a patent for a magnetic ore separator, the first of nearly sixty. He bought up deposits of low-grade iron ore which had been developed in the north of New Jersey. The process was a commercial success until the discovery of iron-rich ore in Minnesota rendered it uneconomic and uncompetitive. In 1898 cement rock was discovered in New Village, west of West Orange. Edison bought the land and started cement manufacture, using kilns twice the normal length and using half as much fuel to heat them as the normal type of kiln. In 1893 he met Henry Ford, who was building his second car, at an Edison convention. This started him on the development of a battery for an electric car on which he made over 9,000 experiments. In 1903 he sold his patent for wireless telegraphy "for a song" to Guglielmo Marconi.
    In 1910 Edison designed a prefabricated concrete house. In December 1914 fire destroyed three-quarters of the West Orange plant, but it was at once rebuilt, and with the threat of war Edison started to set up his own plants for making all the chemicals that he had previously been buying from Europe, such as carbolic acid, phenol, benzol, aniline dyes, etc. He was appointed President of the Navy Consulting Board, for whom, he said, he made some forty-five inventions, "but they were pigeonholed, every one of them". Thus did Edison find that the Navy did not take kindly to civilian interference.
    In 1927 he started the Edison Botanic Research Company, founded with similar investment from Ford and Firestone with the object of finding a substitute for overseas-produced rubber. In the first year he tested no fewer than 3,327 possible plants, in the second year, over 1,400, eventually developing a variety of Golden Rod which grew to 14 ft (4.3 m) in height. However, all this effort and money was wasted, due to the discovery of synthetic rubber.
    In October 1929 he was present at Henry Ford's opening of his Dearborn Museum to celebrate the fiftieth anniversary of the incandescent lamp, including a replica of the Menlo Park laboratory. He was awarded the Congressional Gold Medal and was elected to the American Academy of Sciences. He died in 1931 at his home, Glenmont; throughout the USA, lights were dimmed temporarily on the day of his funeral.
    [br]
    Principal Honours and Distinctions
    Member of the American Academy of Sciences. Congressional Gold Medal.
    Further Reading
    M.Josephson, 1951, Edison, Eyre \& Spottiswode.
    R.W.Clark, 1977, Edison, the Man who Made the Future, Macdonald \& Jane.
    IMcN

    Biographical history of technology > Edison, Thomas Alva

  • 20 Einthoven, Willem

    SUBJECT AREA: Medical technology
    [br]
    b. 21 May 1860 Semarang, Java
    d. 28 September 1927 Leiden, the Netherlands
    [br]
    Dutch physiologist, inventor of the string galvanometer and discoverer of the electrocardiogram (ECG).
    [br]
    As a medical student in Utrecht from 1879 Einthoven published an account of pronation and supination of the arm (following his own injury) as well as a paper on stereoscopy through colour differentiation. Soon after graduating in July 1885, he was appointed Professor of Physiology at Leiden.
    In 1895, while involved in the study of the electric action potentials of the heart, he developed the sensitive string galvanometer, and in 1896 he was able to register the electrocardiograms of animals and humans, relating them to the heart sounds. Developing this work, he not only established the detailed geometry of the leads for these recordings, but was able to build up an insight into their variations in different forms of heart disease. In 1924 he further investigated the action currents of the sympathetic nervous system.
    [br]
    Principal Honours and Distinctions
    Nobel Prize for Medicine or Physiology 1924.
    Bibliography
    1895, "Uber die form des menschlichen Elektrocardiogramms", Pflügers Archiv.
    Further Reading
    de Waart, 1957, Einthoven, Haarlem (complete list of works).
    MG

    Biographical history of technology > Einthoven, Willem

Страницы

См. также в других словарях:

  • sensitive — [[t]se̱nsɪtɪv[/t]] ♦♦♦ 1) ADJ GRADED: oft ADJ to n (approval) If you are sensitive to other people s needs, problems, or feelings, you show understanding and awareness of them. The classroom teacher must be sensitive to a child s needs... He was… …   English dictionary

  • sensitive — sen‧si‧tive [ˈsenstɪv] adjective 1. very easily and quickly affected by changes: • Many economically sensitive companies have closed factories and cut their staff. • We face fierce competition from imports and price sensitive consumers (=… …   Financial and business terms

  • Sensitive but unclassified — (SBU) is a designation of information in the United States Federal Government that, though unclassified, often requires strict controls over its distribution. SBU is a broad category of information including For Official Use Only (FOUO), Law… …   Wikipedia

  • sensitive personal data — Personal data consisting of information on the data subject s racial or ethnic origin, political opinions, religious or similar beliefs, trade union membership, physical or mental health or condition, sexual life, or commission or proceedings for …   Law dictionary

  • subject — n 1 *citizen, national Antonyms: sovereign 2 Subject, matter, subject matter, argument, topic, text, theme, motive, motif, leitmotiv can mean the basic idea or the principal object of thought or attention in a discourse or artistic composition.… …   New Dictionary of Synonyms

  • subject — [adj] at the mercy of; answerable accountable, apt, at one’s feet*, bound by, captive, collateral, conditional, contingent, controlled, dependent, directed, disposed, enslaved, exposed, governed, in danger of, inferior, liable, likely, obedient,… …   New thesaurus

  • sensitive — 1 susceptible, subject, exposed, open, *liable, prone Analogous words: impressed, influenced, affected (see AFFECT): predisposed, disposed, inclined (see INCLINE vb) Antonyms: insensitive 2 *sentient, impressible, impressionable, responsive,… …   New Dictionary of Synonyms

  • sensitive — sen|si|tive W3S3 [ˈsensıtıv] adj ▬▬▬▬▬▬▬ 1¦(understanding people)¦ 2¦(easily offended)¦ 3¦(easily affected)¦ 4¦(situation/subject)¦ 5¦(reacting to changes)¦ 6¦(art/music etc)¦ ▬▬▬▬▬▬▬ [Date: 1300 1400; : Old French; Origin: sensitif, from… …   Dictionary of contemporary English

  • subject — sub|ject1 W2S2 [ˈsʌbdʒıkt] n ▬▬▬▬▬▬▬ 1¦(thing talked about)¦ 2¦(at school)¦ 3¦(in art)¦ 4¦(in a test)¦ 5¦(grammar)¦ 6¦(citizen)¦ ▬▬▬▬▬▬▬ [Date: 1300 1400; : Old French; Origin: Latin subjectus, from subicere …   Dictionary of contemporary English

  • sensitive — adj. 1 aware of other people s feelings VERBS ▪ be ▪ become ▪ make sb ▪ Her experiences had made her sensitive to other people s troubles. ▪ remain …   Collocations dictionary

  • sensitive — / sensifitIv/ adjective 1 UNDERSTANDING PEOPLE able to understand other people s feelings and problems: Underneath all that macho stuff, he s really a sensitive guy. (+ to): We must be sensitive to the community s needs. opposite insensitive 2… …   Longman dictionary of contemporary English

Поделиться ссылкой на выделенное

Прямая ссылка:
… Нажмите правой клавишей мыши и выберите «Копировать ссылку»