Leonardo torres quevedo (29 risultati)

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Paperback or Softback. Condizione: New. Machines � Calculer. Book.

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Paperback. Condizione: New.

Paperback. Condizione: Brand New. 60 pages. Spanish language. 9.00x6.00x0.15 inches. In Stock.

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Encuadernación de tapa dura. Condizione: Bien. Alpuerto / Instituto Técnico de Materiales y Construcciones (INTEMAC), 1979. Texto en español e inglés. 164 pp. Ingeniería. 25 x 17. Edición numerada de 1100 ejemplares (num. 25). Tela editorial tapa dura con dorados en tapa y lomo de editorial ilustrada. Sin subrayados ni anotaciones. Buen estado de conservación. ISBN: 8438100236.…

Condizione: Good / Bien. Madrid: Revista de Archivos, Bibliotecas y Museos, 1920.- 31 p.; 4º. Libro en español LENGUA ESPAÑOLA.

Encuadernación de tapa dura. Condizione: Como Nuevo. Instituto Técnico de Materiales y Construcciones (INTEMAC), 2002. Texto en español y francés. 199 pp. Ingeniería. 25 x 17. Edición numerada de 1300 ejemplares (num. 1296). Tela editorial tapa dura con dorados en tapa y lomo de editorial ilustrada. COMO NUEVO. …

PAP. Condizione: New. New Book. Shipped from UK. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000.

Condizione: New.

.- Madrid. 1908. Gaceta de Madrid. 4º menor. 1 tomo. 80 pgs. Rústica editorial . Pequeña falta esquina cubierta anterior. Muy buen estado genera. . . Ciencias Técnica / Matemáticas.

Encuadernación de tapa dura. Condizione: Como Nuevo. Instituto Técnico de Materiales y Construcciones (INTEMAC), 1999. Texto en español, inglés y francés. 163 pp. Ingeniería. 25 x 17. Edición numerada de 1300 ejemplares (num. 318). Tela editorial tapa dura con dorados en tapa y lomo de editorial ilustrada. COMO NUEVO.…

PAP. Condizione: New. New Book. Delivered from our UK warehouse in 4 to 14 business days. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000.

Paperback. Condizione: New.

Encuadernación de tapa dura. Condizione: Bien. Establecimiento Tipográfico de Fortanet, Madrid, 1898 / Talleres Voluntad, Madrid, 1925. Libros de estudio y textos para la universidad y escuelas superiores. Ingeniería. APUNTES HECHOS POR EL PROFESOR DON ANTONIO PORTUONDO: 283 páginas + 4 láminas desplegables / AZAR Y DETERMINISMO: Discurso leído por Pedro M. González Quijano en Real Academia de Ciencias Exactas, Físicas y Naturales el 2 de diciembre de 1925 con contestación Leonardo Torres Quevedo: 63 páginas. 24 x 17. Pasta española tapa dura con piel y dorados en lomo. Sin subrayados ni anotaciones. Buen estado de conservación.…

1932, Madrid, Academia de Ciencias Exactas, Fisico-Quimicas y Naturales, 73 paginas, 25x18, cubiertas en tapa blanda, buen estado.

1932, Madrid, Academia de Ciencias Exactas, Fisico-Quimicas y Naturales, 73 paginas, 25x18, cubiertas en tapa blanda, buen estado.

1960, ? Vitoria Huecograbado Fournier, Vitoria, 48 paginas, fotografias a toda pagina, 28x23, cubierta en rustica impresa a una tinta, 350 gramos, buen estado.

Tapa dura. Condizione: Como nuevo. Libro.

tapa dura. Condizione: Bien. null (681.5) Ensayos sobre automática: el aritmómetro electromecánico INTEMAC. Madrid. 1996. 25 cm. 163 p. il. Encuadernación en tapa dura artesanal. Idiomas español, ingles y frances. Torres Quevedo, Leonardo 1852-1936. L. Torres y Quevedo. Texto en español, inglés y francés. Control automático. Instituto Técnico de Materiales y Construcciones . ISBN: 8487892205, 9788487892202 (=3641101=) PK159.…

31 pp. 4º. Rústica editorial. Buen estado. Contestación de José Rodríguez Carracido.

Soft cover. Condizione: Good. L(eonardo). Torres (Quevedo) (Leonardo Torres Quevedo), "Sur la stabilité longitudinale des ballons dirigeables" (On the longitudinal stability of airships) in Comptes Rendus de l'Academie des Sciences, Paris, 1905, vol 140, pp. 1019-1021. Brockett 1910 #11999 Extracted from a larger bound volume. GOOD condition (4 or 5/10), with an old vertical fold that runs through and through. Also a small rubber stamp on the front page. What made it significant was that Torres Quevedo was trying to solve one of the central engineering problems of dirigibles before airplanes became dominant: how to make a long, cigar-shaped airship remain stable in pitch—that is, not dive, rear up, oscillate dangerously, or lose control in changing air currents. By the way Torres Quevedo built sophisticated electromechanical and analog calculating devices around from 1890 to about 1920 in the best tradition of the great Vannevar Bush. These machines could solve algebraic equations and perform functional computations automatically.…

Leatherbound. Condizione: NEW. BOOKS ARE EXEMPT FROM IMPORT DUTIES AND TARIFFS; NO EXTRA CHARGES APPLY. Leatherbound edition. Condition: New. Leather Binding on Spine and Corners with Golden leaf printing on spine. Bound in genuine leather with Satin ribbon page markers and Spine with raised gilt bands. Pages: 164. A perfect gift for your loved ones. Reprinted from 1917 edition. NO changes have been made to the original text. This is NOT a retyped or an ocr'd reprint. Illustrations, Index, if any, are included in black and white. Each page is checked manually before printing. As this print on demand book is reprinted from a very old book, there could be some missing or flawed pages, but we always try to make the book as complete as possible. Fold-outs, if any, are not part of the book. If the original book was published in multiple volumes then this reprint is of only one volume, not the whole set. IF YOU WISH TO ORDER PARTICULAR VOLUME OR ALL THE VOLUMES YOU CAN CONTACT US. Resized as per current standards. Sewing binding for longer life, where the book block is actually sewn (smythe sewn/section sewn) with thread before binding which results in a more durable type of binding. Language: Spanish Pages: 164.…

Paris, 1901. Small folio. Original printed wrappers. The fragile wrappers have been expertly restored along the edges. A stain to back wrapper, a closed horizontal tear, and spine re-enforced. A bit of soiling and discolouration. With a library-label to top of front wrapper, from the Bibliothèque des professeurs St-Stanislas, Mons, of which there is a book-plate to half-title and a stamp to title-page. Wrappers loose. Internally some brownspotting and finely restored marginal chipping, far from affecting text. 32 pp. Richly illustrated. Exceedingly scarce original offprint of Torres y Quevedo's publication of his seminal algebraic machines, constituting a milestone in computing history. In this thoroughly illustrated publication, Torres y Quevedo explains the construction and operation of the first accurate calculating machines, following his explanation of them before the French Academy of Sciences earlier the same year. "At the end of the nineteenth century, several analog machines had been proposed for solving algebraic equations. These machines -based not only on kinematics principles but also on dynamic or hydrostatic balances, electric or electromagnetic devices, etc.- had one important drawback: lack of accuracy. Leonardo Torres was the first to beat the challenge of designing and implementing a machine able to compute the roots of algebraic equations that, in the case of polynomials of degree eight, attained a precision down to 1/1000. The key element of Torres' machine was the endless spindle, an analog mechanical device designed to compute log(a +b) from log(a) and log(b). This short account gives a detailed description of this mechanism." (Federico Thomas: A Short Account on Leonardo Torres' Endless Spindle). Leonardo Torres y Quevedo (1852 -1936), civil engineer and mathematician, was a one of the most important Spanish inventors of all time. Although little known outside of Spain and France in his life-time, he was an inventor of the utmost importance and would later be recognized as one of the most significant inventors of the beginning of the twentieth century. Apart from pioneering accurate automated calculation machines, he was also a pioneer in the development of the radio control, the inventor of a chess automaton (the first decision-making automaton), an innovative designer of the three-lobed non-rigid Astra-Torres airship as well as the Whirlpool Aero Car located in Niagara Falls, and with his Telekine, he created wireless remote-control operation principles."Leonardo Torres was probably the most eminent Spanish engineer in the first half of the 20th century. He had a great influence, truncated by the Spanish Civil War, in the development of automatic control in Spain. As Randell points out in, we can only speculate on what might happened if Torres' writings had become better known to the English-speaking world. For instance, he qualifies Torres' paper Essays on Automatics as "a fascinating work which well repays reading even today." The paper contains what Randell believes to be the first proposal of the idea of floating-point arithmetic. It seems clear that Torres' contributions deserve much wider appreciation outside Spain". (Federico Thomas: A Short Account on Leonardo Torres' Endless Spindle). "Because of Torres Quevedo's work on analog machines, the Paris Academy of Sciences welcomed his "Calculating Machines" report in 1900. As a result, he was elected to the Academy of Sciences in Madrid in 1901, where he delivered a lecture on algebraic machines.The endless spindle was a critical component of the 8-term equation-solving computing machine. It created sums to answer the algorithm's central equation. The mechanism was the first of its sort, and it was the most intriguing and unique of Torres Quevedo's inventions.Torres Quevedo's calculating machine was both theoretically and practically groundbreaking. The endless spindle is a mechanical device that evaluates an expression's logarithm as the sum of numerous logarithms, overcoming the difficulty of reaching enough precision with an automatic set of parts." (The History of the Computer) The algebraic machine of Torres was an analog computing device, featuring a mechanism based on cone-shaped pulley with a helical groove around it. The machine was used for the resolution of equations like: + Ax = B or + Ax = B. His publications marked the beginning of a new era in mathematical theory, and his contributions resulted in the creation of cutting-edge new machinery. "Torres Quevedo's writings ushered in a new era in mathematical theory based on new concepts. His contributions led to the development of innovative new machines.He built a series of analog calculating machines to complement his theoretical work, all of which were mechanical." (Torres Quevedo Museum - where another copy of the present offprint is displayed) "Leonardo Torres (1852-1936), usually known as Leonardo Torres y Quevedo in Spanish-speaking countries, was a Spanish engineer and mathematician. He was president of the Academy of Sciences of Madrid, a member of the French Academy of Sciences, and famous-mainly in Spain and France- as a prolific and successful inventor. Some of the earliest Torres' inventions took the form of mechanical analog devices, considered of great originality, aiming at implementing what he called the Algebraic Machine. This machine had the ability of computing the values of arbitrary polynomial functions in one variable. Since it was an analogue machine, the variable could attain any value, not only a preestablished set of discrete values, contrarily to what happened, for example, with the celebrated Babbage's Difference Engine, an engine that used the method of finite differences to generate successive values of polynomial functions. In Torres' Algebraic Machine, all quantities were represented by means of angular displacements in logarithmic scale. Then, adding a counter to keep track of the number of turns, it was possible t.…

Introducción de Manuel Garrido. 12x17. 96 pp. KRK Ediciones. Oviedo, 2008. En 1914 Leonardo Torres Quevedo publicó Ensayos sobre Automática sin saber que estaba sentando los principios de lo que cuarenta años más tarde sería conocido como inteligencia artificial.978-84-8367-132-0. Su idea era sencilla pero genial. Ante el fracaso de Babbage de crear una máquina pensante utilizando medios exclusivamente mecánicos, Torres Quevedo vislumbra la posibilidad de resolver el problema utilizando medios electrotécnicos.En este escrito, auténtica obra de un visionario, se exponen los principios de la Automática, la disciplina que sería capaz de crear máquinas capaces de resolver problemas y estar conectadas con el medio, capaces de simular el pensamiento y la acción humana o, como él mismo dice: la disciplina que tiene la tarea de examinar 'los procedimientos que pueden aplicarse a la construcción de autómatas dotados de una vida de relación más o menos complicada'.Su biógrafo, el profesor Santesmases, califica Ensayos sobre Automática como 'la más ambiciosa y audaz de sus obras', parangonable sin desdoro con el ensayo fundacional sobre la metáfora del ordenador publicado por Alan Turing en 1950, y el texto 'donde mejor se puede medir el vuelo de su mente'.…

Paperback. Condizione: new. Paperback. Machines a calculer / par M. L. Torres, .Date de l'edition originale: 1901Sujet de l'ouvrage: CalculatricesLe present ouvrage s'inscrit dans une politique de conservation patrimoniale des ouvrages de la litterature Francaise mise en place avec la BNF. HACHETTE LIVRE et la BNF proposent ainsi un catalogue de titres indisponibles, la BNF ayant numerise ces oeuvres et HACHETTE LIVRE les imprimant a la demande. Certains de ces ouvrages refletent des courants de pensee caracteristiques de leur epoque, mais qui seraient aujourd'hui juges condamnables. Ils n'en appartiennent pas moins a l'histoire des idees en France et sont susceptibles de presenter un interet scientifique ou historique. Le sens de notre demarche editoriale consiste ainsi a permettre l'acces a ces oeuvres sans pour autant que nous en cautionnions en aucune facon le contenu. Pour plus d'informations, rendez-vous sur This item is printed on demand. Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability.…