Characterization Of Friction Stir Welded Joints Of Aa 2024-T351 - Native Vs. Treated By Laser Shock Processing

The paper presents a consistent set of results showing the ability of Laser Shock Processing (LSP) in modifying the overall properties of the Friction Stir Welded (FSW) joints made of AA 2024-T351. Based on laser beam intensities above 109 W/cm2 with pulse energies of several Joules and pulses durations of nanoseconds, LSP is able of inducing a compression residual stress field, improving the wear and fatigue resistance by slowing crack propagation and stress corrosion cracking, but also improving the overall behaviour of the structure. After the FSW and LSP procedures are briefly presented, the results of micro-hardness measurements and of transverse tensile tests, together with the corrosion resistance of the native joints vs. LSP treated are discussed. The ability of LSP to generate compressive residual stresses and to improve the behaviour of the FSW joints is underscored.

Fiestas de Valencia en obsequio de SS. MM. y AA

Segun Palau V, 91265, la fecha de impresión es 1802

Arenga pera tirar desde el carro, que fa Sento el Novelero, de la Chunta que tingueren el Rat-Penat, el Pardal del Rellonche de Sen Chuan, el Dragó del Colechi ... : ahon éste feu descripció de la Danza, y Carro Triunfant que en obsequi de SS. MM. y AA. fan els empleats de Pes Real, del Oli, Arros ...

Autor tomado del final del texto

Continuacion de la relación sucinta de los adornos de la carrera que previno esta ciudad a la venida de SS. MM. y AA. ...

De otros textos de la época se deduce la fecha, 1802

Opusculo historico de la ciudad de Orihuela : escrito y dedicado a su ilustre Ayuntamiento por D.J.A. de A. : con motivo de la venida de SS. MM. y AA. a la espresada [sic.] ciudad

otras obras (arm. 65)

Valencia, regocijada por una parte con la venida de SS. MM. y AA. de vuelta de Barcelona y agitda por ... haber desembarcado en aquella ciudad ... Don Francisco Genaro, y Doña Maria Antonia, principes de Napoles : [Texto impreso] y ... confusa, por ... que no podra obsequiarles como corresponde ... quedar ayrosos como siempre

Hay un ejemplar encuadernado con: Individual noticia de todos los altares, arcos pinturas, adornos y lo mas exquisito y notable que havia en la carrera de la procession, y de las iluminaciones en general ... : (XVIII/1705).

Resposta as reflexoens que o R.P.M. Fr. Arsenio da Piedade Capucho fez as livro intitulado "Verdadeiro metodo de estudar" [Texto impreso]

Sign. : []1, *4, B-S4, T1

A curved RNA helix incorporating an internal loop with G·A and A·A non-Watson–Crick base pairing

The crystal structure of the RNA dodecamer 5′-GGCC(GAAA)GGCC-3′ has been determined from x-ray diffraction data to 2.3-Å resolution. In the crystal, these oligomers form double helices around twofold symmetry axes. Four consecutive non-Watson–Crick base pairs make up an internal loop in the middle of the duplex, including sheared G·A pairs and novel asymmetric A·A pairs. This internal loop sequence produces a significant curvature and narrowing of the double helix. The helix is curved by 34° from end to end and the diameter is narrowed by 24% in the internal loop. A Mn2+ ion is bound directly to the N7 of the first guanine in the Watson–Crick region following the internal loop and the phosphate of the preceding residue. This Mn2+ location corresponds to a metal binding site observed in the hammerhead catalytic RNA.