Download La catedral de Turing (Los orígenes del universo digital) by George B. Dyson PDF

By George B. Dyson

«Es posible inventar una sola máquina que pueda utilizarse para computar cualquier secuencia computable», anunció en 1936 un joven Alan Turing de veinticuatro años. En los años forty y 50 un reducido grupo de hombres y mujeres, liderado por John von Neumann, se reunió en Princeton, New Jersey, para comenzar los angeles construcción de una de los primeros ordenadores que materializaría l. a. visión de Alan Turing de una máquina common. Los códigos generados en ese embrión de universo de five kilobytes (menos memoria de lo que requiere un solo icono en los angeles pantalla de un ordenador real) rompieron los angeles distinción entre números que significan cosas y números que hacen cosas, y nuestro universo cambió para siempre. los angeles catedral de Turing es los angeles historia de l. a. invención más constructiva del siglo XX, el ordenador electronic, de quiénes y cómo l. a. crearon. Un relato histórico y profético que nos cuenta cómo el código logró conquistar el mundo y se aventura a plantear el futurodel universo digital.
"No es solo un libro extraordinario sobre ciencia. Es un libro extraordinario, punto."

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Mandatory Appendix A values must be converted to kPa when the design pressure is in kPa. 7 Weld Strength Reduction Factors to Be Applied When Calculating the Minimum Wall Thickness or Allowable Design Pressure of Components Fabricated With a Longitudinal Seam Fusion Weld Weld Strength Reduction Factor for Temperature, °F (°C) [Notes (1)–(7)] Steel Group 700 (371) 750 (399) 800 (427) 850 (454) 900 (482) 950 (510) 1,000 (538) 1,050 (566) 1,100 (593) 1,150 (621) 1,200 (649) CrMo [Notes (8), (9), (10)] CSEF (N+T) [Notes (8), (11), (12)] ...

3) extruded pipe: pipe produced from hollow or solid round forgings, usually in a hydraulic extrusion press. In this process the forging is contained in a cylindrical die. Initially a punch at the end of the extrusion plunger pierces the forging. The extrusion plunger then forces the contained billet between the cylindrical die and the punch to form the pipe, the latter acting as a mandrel. 4) centrifugally cast pipe: pipe formed from the solidification of molten metal in a rotating mold. Both metal and sand molds are used.

Integrally reinforced branch outlet fitting: a branch outlet fitting that is welded directly to a run pipe, where the branch fitting and the deposited weld metal used to attach the fitting to the run pipe are designed by the fitting manufacturer to provide all the reinforcement required by this Code without the addition of separate saddles or pads. The attachment of the branch pipe to the fitting is by butt welding, socket welding, threading, or by a flanged connection. Integrally reinforced branch outlet fittings include those fittings conforming to MSS SP-97.

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