Continuum crystal plasticity finite element simulations are performed for archetypal pure and alloyed fcc crystals to investigate the role of the crystalline orientation, hardening response and ...dislocation interactions on the plastic flow patterns developing underneath spherical and pyramidal indenter tips. Following our prior analyses, the orientation of plastic features such as subsurface lobes and surface rosettes goes along that of specific in-plane and out-of-plane slip systems. Interestingly, however, we currently show that the activity of the closely oriented slip systems in such lobes and rosettes is, in general, unaccountable to their development. In highly symmetric (001), (011) and (111) indentations, it is found that the slip systems with a net out-of-plane slip direction may contribute to rosette formation at the surface, whereas in-plane slip directions lead to lobe formation in the subsurface. The present results also show that while the isocontours of maximum shear stress τ
max
from anisotropic elasticity analyses indeed provide an indication of the indentation-induced elastic field, it is the projection of the stress tensor in all slip systems that drives lobe formation. The isocontours of τ
max
may not therefore dictate the plastic zone shape, even though they are useful in explaining some of its features. Finally, a conical shear band shape is found to develop immediately underneath the imprint, dictating accumulation of shear strains and their spreading towards the thickness of the crystal. This feature varies depending on crystal orientation, hardening response and on whether or not the cross-section under analysis contains normal slip directions.
Technology of Islamic lustre Pradell, Trinitat; Molera, Judit; Smith, Andrew D. ...
Journal of cultural heritage,
12/2008, Letnik:
9
Journal Article, Publication
Recenzirano
Odprti dostop
Replications of the lustre layers have been produced using laboratory-controlled conditions, based on a 13th century AD lustre recipe. The characteristics of the lustre layers obtained by using ...different paint and glaze compositions, thermal paths and atmospheres are summarised. The key parameters needed to reproduce the colours, composition and metallic optical response shown by medieval lustres are given. Analysis of the microstructural, chemical and optical characteristics of the reproductions gives a deep insight into the conditions needed for the production of lustre layers with different colours and shines. The necessary changes and improvements in the lustre process from the beginning of the lustre production (Iraq 9th and 10th centuries AD), through the Fatimid (Egypt 11th and 12th centuries AD) and later Syrian and Persian (late 12th and 13th centuries AD) productions are reviewed.
Glass-ceramic materials- principles, development, and applications Glass-ceramic materials occupy a unique position in the development of a range of new and versatile technologies. Offering readers a ...comprehensive overview of the many types of glass-ceramic materials, the methods of their development, and their countless uses across a range of industries, Glass-Ceramic Technology, Second Edition is a must-have resource on a rapidly emerging field of materials science. With applications across many industries, from missile nose cones to cookware to electronic packaging, glass-ceramics are found in virtually all fields where thermo-mechanical properties are most critical. Edited by two leading authorities in the field, Wolfram Höland and George H. Beall, responsible themselves for the development of several of the new materials described in the book, Glass-Ceramic Technology examines the key principles involved in glass-ceramic formation, composition systems, microstructure control, and more. Fully revised and updated to provide cutting-edge coverage of the most recent developments, this Second Edition looks at new high-strength glass-ceramics, new composite materials containing glass-ceramics and high-strength polycrystalline ceramics, new glass-ceramics with special optical properties and new dental materials. The book provides in-depth discussion of development trends, with an emphasis on controlled nucleation and crystallization in specific materials systems, placing a particular emphasis on applications within the medical and dental fields. Designed as a resource for anyone looking to learn more about glass-ceramic materials, their scientific and technological background, and their applications, Glass-Ceramic Technology, Second Edition is essential reading for scientists, engineers, technicians, and students working in the natural and
medical sciences and technology, and related fields.
Provider: - Institution: - Data provided by Europeana Collections- Imatges del castells de Paralada i entrevista a la amília Mateu sobre la història del castell. 00:00:00 Vistes del castell de ...Peralada.
00:01:07 Claustre i campanar de l'església.
00:02:27 Biblioteca del castell de Peralada.
00:04:48 Col·lecció de peces de ceràmica i de vidre. Col·lecció de monedes.
00:08:54 Interior de la nau gòtica de l'església.
00:00:00 La família Mateu, propietaris del castell, expliquen la història del castell i del Festival de Peralada.- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
El objetivo de este trabajo, es la construcción de una embarcación de recreo, más concretamente de un kayak . Las motivaciones que me han llevado a hacer un proyecto como este son mi interés por el ...diseño y construcción de embarcaciones de recreo, y más concretamente la construcción de embarcaciones con composites.Para construir un kayak primeramente se debe hacer un estudio de los tipos de kayaks previamente diseñados, así como su uso y utilidad, además de estudiar los materiales con los que se construyen y que métodos de construcción son los que se utilizan.Para el diseño del kayak, se utiliza un programa de diseño de kayaks llamado Kfoundry , este programa usa maxsurf para hacer los cálculos. Para diseñar el kayak, se le darán varias vueltas a la espiral de diseño
Provider: - Institution: - Data provided by Europeana Collections- Reportatge de la ciutat de Venècia (Itàlia). UI: 18
00:06:25 Pont de Rialto. Gòndoles i “vaporettos” pels canals.
00:07:16 Gòndoles ...amarrades.
00:07:30 Plaça de San Marco. Coloms. Basílica.
00:07:50 Vista aèria.
00:08:50 Retaule.
00:09:18 Treball artesà de peces de vidre.
00:09:41 Canals. Gòndoles.
00:10:02 Vaixells mercants. Llanxes.
00:11:02 Palaus. Ponts. Temples. Gòndoles. “Vaporettos”. Vistes de la ciutat des dels canals.
00:13:01 Plaça de San Marco.
00:13:40 Canals. Gòndoles. palaus.
00:13:57 Basílica de San Marco.
00:14:29 Imatges repetides en una altra tonalitat de color.
UI:20
00:36:35 Estàtues de cavalls i dues escultures autòmats tocant una campana al cim d’un palau.
00:37:10 Vista panoràmica de la plaça San Marco.
00:37:36 Mosaics.
00:37:50 Façana de la basílica de San Marco.
00:38:09 Plaça San Marco. Nena jugant amb els coloms.
00:38:29 Gòndoles amarrades als canals i gòndoles navegant pels canals.- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
Provider: - Institution: - Data provided by Europeana Collections- Imatges de la ciutat de Venècia.- 00:00:02 Pont de Rialto. Gòndoles i “vaporettos” pels canals.
00:00:39 Gòndoles amarrades als ...canals.
00:01:00 Plaça de San Marco. Coloms. Basílica.
00:01:22 Vista elevada sobre la plaça.
00:02:11 Vistes panoràmiques de Venècia.
00:02:22 Retaule de plata.
00:02:53 Treball artesà de peces de vidre.
00:03:13 Vistes dels canals. Gòndoles.
00:03:34 Vaixells mercants. Llanxes.
00:03:34 Palaus. Ponts. Temples. Gòndoles. “Vaporettos”. Vistes de la ciutat des dels canals.
00:06:34 Vistes de la plaça de San Marco. Turistes passejant i donant de menjar als coloms.
00:06:57 Façana de la basílica.
00:07:12 Canals. Gòndoles. Palaus.
00:07:30 Basílica de San Marco.
00:14:29 Imatges repetides.
00:15:57 Estàtues de cavalls i dues escultures autòmats tocant una campana al cim d’un palau.
00:16:30 Vista panoràmica de la plaça San Marco.
00:16:58 Mosaics.
00:17:11 Façana de la basílica de San Marco.
00:17:23 Escultura.
00:17:37 Plaça San Marco. Nena jugant amb els coloms.
00:17:49 Gòndoles amarrades als canals i gòndoles navegant pels canals.- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
This book is one of a series reporting on international research and development activities conducted by the Schott Group companies. With the series Schott aims to provide an overview of its ...activities for scientists, engineers, and managers from all branches of industry worldwide where glass and glass ceramics are of interest. Each volume begins with a chapter providing a general idea of the current problems, results, and trends relating to the subject treated. This volume lays the foundations for - supervision of production processes, including raw materials, evaporation from the melt, exhaust gases, and environmental concerns; - troubleshooting in case of glass defects in combination with research for the design of faultless (in the ppm range) or at least high-yield processes; - understanding the origin of customer complaints because of unfulfilled expectations concerning material properties or product behaviour. The book is conceived as a monograph. The individual chapters, however, are written by leading Schott experts on the corresponding subjects. Many figures, tables, and examples are chosen to introduce the reader to thin-film science and technology.
Provider: - Institution: - Data provided by Europeana Collections- Informatius diaris. 00:00:11 L'Associació de Pares d'Alumnes del CEIP Joan Bruguera s'han manifestat aquest matí a la Gran Via Jaume ...I per protestar per les obres de remodelació del centre.
00:02:09 La UdG ha presentat la Unitat de Suport a la Docència Virtual que té com a objectiu desenvolupar l'aplicació de la informàtica i d'internet. Ramon Fabregat (dir. USDV).
00:04:29 Les peces de ceràmica i vidres de l'antiga Farinera Ensesa passaran a formar part de la col·lecció del Museu d'Història de la Ciutat. Joaquim Nadal (alcalde de Girona).
00:06:03 L'Ajuntament de Girona ha editat un nou plànol il·lustrat en sis idiomes del Barri Vell de la ciutat. Joaquim Nadal.
00:08:08 L'empresa CORVE ha creat la pàgina d'internet Totvehicle.com per donar informació del mercat de cotxes d'ocasió. Ernest Plana (pres. de CORVE).
00:10:33 La Fundació Viure i Conviure de la Caixa de Catalunya va celebrar al Club de Jubilats Sant Jordi de Girona la festa de cloenda del programa Intergeneracional, en el que persones grans i estudiants universitaris comparteixen habitatge.
00:12:56 Festa major de Cassà de la Selva: 26a edició de la Nit dels Músics Cassanencs. Cercavila i focs artificials.
00:15:15 Concert de la pianista Elena Bayo i el baix Mariano Viñuales dins el cicle de concerts dedicat al centenari de Verdi.
00:17:30 1a Setmana de Tapes i Aperitius de Girona.
00:18:33 Gran Prix Internacional de l'Home més Fort del Món, celebrat a Platja d'Aro.
00:20:57 21a edició de l'acte d'entrega de les Medalles de l'Esport de les Comarques Gironines. Glòria Pallé (secr. gral. de l'Esport). Marta Ferrusola (esposa del pres. de la Generalitat).
00:23:22 La 6a edició del Torneig Cadegés de Futbol 7 es va haver de suspendre a causa de la pluja.
00:25:50 La Borsa.
00:27:51 Concert del grup de música pop La Oreja de Van Gogh al pavelló de Fontajau.- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
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