Upgrading the prediction of jet grouting column diameter using deep learning with an emphasis on high energies

This article proposed a new method to estimate the diameter of jet grouting columns. The method uses the largest data collection of column diameters measured to date and includes a large amount of new data that fills the existing gap of data for high injection energies. The dataset was analysed using a deep neural network that took into account the problem’s key parameters (i.e. type of soil, soil resistance, type of jet and specific energy in the nozzle). As a result, three different neural networks were selected, one for each type of jet, according to the errors and consistency associated with each. Finally, using the trained networks, a number of design charts were developed to determine the diameter of a jet grouting column as a function of the soil properties and the jet system. These charts allow generating an optimal jet grouting design, improving the prediction of the diameter of jet columns especially in the high energy triple fluid.This work was supported by the Spanish Ministry of Economy and Competitiveness, the State Agency of Research and the European Funds for Regional Development under project TEC2017-85244-C2-1-P

A weakly non-hydrostatic shallow model for dry granular flows

A non-hydrostatic depth-averaged model for dry granular flows is proposed, taking into account vertical acceleration. A variable friction coefficient based on the $\mu(I)$ rheology is considered. The model is obtained from an asymptotic analysis in a local reference system, where the non-hydrostatic contribution is supposed to be small compared to the hydrostatic one. The non-hydrostatic counterpart of the pressure may be written as the sum of two terms: one corresponding to the stress tensor and the other to the vertical acceleration. The model introduced here is weakly non-hydrostatic, in the sense that the non-hydrostatic contribution related to the stress tensor is not taken into account due to its complex implementation. A simple and efficient numerical scheme is proposed. It consists of a three-step splitting procedure, and it is based on a hydrostatic reconstruction. Two key points are: (i) the friction force has to be taken into account before solving the non-hydrostatic pressure. Otherwise, the incompressibility condition is not ensured; (ii) both the hydrostatic and the non-hydrostatic pressure are taken into account when dealing with the friction force. The model and numerical scheme are then validated based on several numerical tests, including laboratory experiments of granular collapse. The influence of non-hydrostatic terms and of the choice of the coordinate system (Cartesian or local) is analyzed. We show that non-hydrostatic models are less sensitive to the choice of the coordinate system. In general, the non-hydrostatic model introduced here much better reproduces granular collapse experiments compared to hydrostatic models. An important result is that the simulated mass profiles up to the deposit and the front velocity are greatly improved. As expected, the influence of the non-hydrostatic pressure is shown to be larger for small values of the slope

The environs of Seville in the 16th century: three views from Civitates Orbis Terrarum

A finales del siglo XVI se publicó una importante obra conocida como Civitates Orbis Terrarum, con tres vistas de Sevilla de gran valor documental –dos de Hoefnagel y una copiada de Brambilla– que detallaron con verosimilitud su periferia urbana, junto a textos explicativos. Tras revisar su contexto, por primera vez se analiza el territorio extramuros representado: puerto, arrabales, murallas e hitos arquitectónicos en un entorno de carácter agrario. Además se consideran otras vistas y plagios, localizando sus miradores sobre aquel paisaje poco conocido y transformado por la ciudad actual.The end of the 16th century saw the publication of a crucial work known as Civitates Orbis Terrarum including three views of Seville of high documentary value –two by Hoefnagel and one copied from Brambilla– accurately portraying the city outskirts with explanatory texts. After examining their context, and for the first time, the detailed area is analyzed: port, suburbs, city walls and architectural landmarks in agrarian surroundings. Besides, other original views and copies are evaluated, locating their point of views on the original landscape, opposed to the transformed, current city

Изменение; организации, которые учатся способам достижения организационного изменения

Why it is really difficult for any organization to achieve a change, the efforts of a manager could work but will not last over time. This article tries to explain how organizations learn and the importance of it in their environment, as well as how an organizational change could be reached.Почему так трудно для любой организации изменяться успешно, почему усилия менеджеров оказываются столь непродолжительными. Эта статья – попытка объяснить, как организации учатся и почему это важно для их окружения, и как вообще достижимо организационное изменение

La lectura y su relación con el conocimiento y el aprendizaje

1 archivo PDF (14 páginas). fhquadragintaquattuorLa manifestación más propiamente humana relacionada con el lenguaje, la oralidad, esta intrínsecamente unida al fenómeno lecto-escritor, ya desde los orígenes de la humanidad. A partir de finales del siglo XIX y a lo largo del siglo XX se llevo a cabo una serie de investigaciones para relacionar el desarrollo del lenguaje humano y más concretamente de la vertiente lecto-escritora de éste, con la evolución del pensamiento humano, y dentro de éste d el conocimiento y del aprendizaje y de las sociedades modernas, lo que ha dado como resultado el nacimiento de nuevos en foques para la enseñanza de la lengua. Palabras clave: Lecto-escritura. Havelock. Olson. Sociología de la lectura. Conductismo. Ausubel. Chomsky. Piaget. Kenneth Goodman. Lenguaje integra

Convergent Strategy for the Regioselective Synthesis of Nonaggregated α-Triaryl-β-carboxy Zinc Phthalocyanines

This document is the unedited author's version of a Submitted Work that was subsequently accepted for publication in Organic Letters, copyright © American Chemical Society after peer review. To access the final edited and published work, see http://pubs.acs.org/doi/abs/10.1021/ol503557cA new design of non-aggregated zinc(II) carboxyphthalocyanines with potential application in dye-sensitized solar cells has been developed. It is based on the introduction of bulky and rigid aryl groups at three α positions of the macrocycle. The synthesis has been carried out following a convergent route in which the bulky aryl groups are introduced by Suzuki-Miyaura cross-coupling reaction on a preformed triiodophthalocyanine derivative. Two regioisomers of this α-triaryl-β-car-boxyphthalocyanine could be isolated by column chromatographyFinancial support is acknowledged from European Union within the FP7-ENERGY-2012-1 framework, GLOBALSOL project, Proposal No 309194-2 and from the Spanish MEC (CTQ2011- 24187/BQU) and MICINN (PRI-PIBUS-2011-1128

Datos sobre la alianza Corynephoro-Plantaginion Radicatae Rivas Goday & Rivas-Martínez 1963 Nom. Invers. Rivas Martínez 1975 en el sector Orensano-Sanabriense

Se estudian los pastizales duros, abiertos y pobres constituidos por especies vegetales pulvinulares del piso supramediterráneo de ombroclimas subhúmedo y húmedo del Sector Orensano Sanabriense, incluibles en la alianza Corynephoro Plantaginion radicatae Rivas Goday & Rivas Martínez 1963 nom. invers. Rivas Martínez 1975, describiéndose la asociación Diantho merinoi Plantaginetum radicatae nova.The poor, open, hard meadows are studied. They are formed by pulvinular species in supramediterranean level, with subhumid and humid ombroclimous. They are included in the alliance Corynephoro Plantaginion radicatae Rivas Goday & Rivas Martínez 1963 nom. invers. Rivas Martínez 1975. The association Diantho merinoi Plantaginetum radicatae nova is described