Analysis of shock capturing methods for chemical species transport in unsteady compressible flow

This paper presents a chemical species transport model to account for variable composition and gas properties along the flow path in internal combustion engines. The numerical solution to adapt the gas dynamic model to chemical species transport in boundary conditions by means of the Method of Characteristics and in volumes by means of a filling and emptying model is described. The performance for chemical species transport in 1D elementsof shock-capturing methods, such as the two-step Lax Wendroff method and the Sweby s TVD scheme considering several flux limiter definitions, is carried out by means of shocktube tests. The influence of the fluid modelling as perfect or non-perfect gas on the numerical methods features and the flow characteristics on shock-tube results are analysed.This work has been partially supported by the Spanish Ministerio de Ciencia e Innovacion through grant number DPI2010-20891-C02-02.Serrano Cruz, JR.; Climent, H.; Piqueras, P.; García Afonso, Ó. (2013). Analysis of shock capturing methods for chemical species transport in unsteady compressible flow. Mathematical and Computer Modelling. 57(7-8):1751-1759. https://doi.org/10.1016/j.mcm.2011.11.026S17511759577-

Sobre culturas e identidades en la mundialización capitalista

The thematic axis this article follows consists in the present phase of capitalist system: the globalization. This subject is analyzed from two paradoxical processes that are taken like premises. On the one hand arguing are the interstate and intrastate scales with the exponential increase of unevenness, social breaking up and decrease macro-political scope. Other it is the development of the productive and social forces, in addition to the opening of possibilities of the enrichment of the reflective action. Thus, it unveils the cultures and identities importance based on the study of Capitalism and its relations with History, particular histories, space and time

Comparative study of honey bee production with one and three queens by beehive in nueva imperial, IX region, Chile

In the Region of La Araucanía tests have been made where the production of honey of double queen beehives was compared to single queen beehives, with encouraging results. This motivated the accomplishment of this study in the zone of Nueva Imperial, which compared the conventional production of honey of triple queen systems and systems with one queen by beehive. For the accomplishment of this study 12 beehives were used, nine were grouped to form the triple queen systems and the remaining three with one queen were used as control. The research began on November 4th 2004, with weekly visits to control the factors that could affect the honey productions. The crop was made on January 11th 2005, reaching a honey production of 85 kg average for triple queens systems, which was significantly greater to the production obtained by the systems with a single queen which reached 19,17 kg of honey average.En la Región de La Araucanía se han realizado ensayos donde se comparó la producción de miel de colmenas doble reina y colmenas de una sola reina, con resultados alentadores. Esto motivó la realización de este estudio en la zona de Nueva Imperial, el cual comparó la producción de miel de sistemas de triple reina y sistemas convencionales con una reina por colmena. Para la realización de este estudio se utilizaron 12 colmenas, de las cuales nueve se agruparon para formar los sistemas triple reina, y las tres restantes con una reina fueron utilizadas como testigo. La investigación comenzó el 4 de noviembre del 2004, con visitas semanales, para controlar los factores que pudieran incidir en la producción de miel. La cosecha se realizó el 11 de enero de 2005, alcanzándose producciones promedio de 85 kg de miel para los sistemas triple reina, lo cual fue significativamente mayor a la producción lograda por los sistemas con una sola reina que alcanzaron 19,17 kg de miel promedio

The ‘Dys-Appearing’ Body in Doris Lessing’s The Diary of a Good Neighbour and Margaret Forster’s Have the Men Had Enough?

If the old body is usually read as a synonym of fragility and upcoming illness, even though not the case for most elderly citizens, the reality is that the longer we live, the increased probability of being affected by different illnesses cannot be eluded or denied. In Doris Lessing’s The Diary of a Good Neighbour and Margaret Forster’s Have the Men Had Enough? the reader is invited to participate in the day-to-day routines of two aged female protagonists, as well as to empathize with their inner feelings as they go through their last life stage. In fact, their ‘dys-appearing’ bodies, marked by their respective terminal illnesses, force these characters to grow closer to those around them and to accept the help of their families and friends, despite their desire to keep their free will and independence until the very end. The analysis of the two novels within the framework of ageing studies aims to show the contradictions existing between a growing ageing society and the negative cultural connotations of old age in Western society and the need to revise them

Intercomparison of North American radon progeny measurement methods and equipment

"Twelve laboratories from the western United States and Canada participated in radon progeny intercomparison measurements at the U.S. Bureau of Mines radon calibration facility in March 1987. The participants intercompared grab-sampling and automated equipment methods at high and low concentrations of radon progeny and condensation nuclei. The objective of this intercomparison was to determine if the measurement procedures and equipment of the North American facilities are equivalent. The sampling results showed good agreement among all participants. The standard deviation for the working level measurements was less than 3.5 pct for 1.70 Working level (wl) and less than 8.8 pct for 0.21 Wl. This relatively good agreement was achieved by using alpha standards calibrated by the National Bureau of Standards and by closely checking and monitoring airflows." - NIOSHTIC-2NIOSHTIC no. 10006819198

Characterisation of construction materials: a chemical comparison of historical mortars

[EN] This text outlines the results obtained in a case study about construction materials analysis, concerning a set of watchtowers scattered throughout the territory of Cuenca Province, Spain. The complete understanding of these buildings has been possible thanks to different approaches. Territorial analysis, historic study, surveys and construction definition have been the key-factors of architectural research. But a good result could not be possible without a rigorous chemical study. Samples carried out on mortars from different watchtowers have been compared and analyzed. In this frame, a wide range of microanalysis methods has been applied to the samples (i.e. light microscopy, FTIR spectroscopy, scanning electron microscopy-X-ray, X-ray diffraction, granulometric analysis, insoluble residue) with the purpose of confirming the constructive homogeneity and technology of the buildings, as interesting examples of Spanish Christian Reconquest.This research has been made possible thanks to the Project “Trazabilidad Histórica Y Perspectivas Para Los Materiales Sostenibles Vinculados A La Tradición Constructiva De La Comunidad Valenciana” Ayudas GV 2014/014, Conselleriad’Educació, Cultura i Esport, GVA, main researcher V. Cristini.Ruiz Checa, JR.; Cristini ., V.; Valcuende Payá, MO.; Osete Cortina, L. (2015). Characterisation of construction materials: a chemical comparison of historical mortars. WIT Transactions on Engineering Sciences (Online). 90:83-94. https://doi.org/10.2495/MC150081S83949

The military presidio in Cuba: Penitentiary reform and labor market in the first half of the nineteenth century

Este texto se centra en analizar cómo la reforma penitenciaria sirvió para que el presidio militar en Cuba cumpliera fines civiles. Desde finales del siglo XVIII los presidiarios allí recluidos, militares y civiles, fueron empleados en las más variadas actividades, tanto en las ciudades como en el campo, pero fue durante la primera mitad del siglo XIX, a tenor de los avances que en la península iban produciéndose en materia penitenciaria, que estos centros de reclusión alcanzaron un protagonismo mayor. Al compás de la reforma, el presidio militar cubano acabó jugando un papel primordial para sostener las cada vez más crecientes necesidades de mano de obra en la colonia española.This article focuses on analyzing how penitentiary reform served the Cuban military presidio to fulfill civilian purposes. Since Eighteenth century the convicts confined there, military men and civilians, were employed in very different activities both in the cities and the countryside, but during the Nineteenth century, linked to the improvements of the penitentiary reform approved in the Peninsula, these centers of imprisonment became central points. Following the reform, the Cuban military presidio played an important role in order to support the increasingly growing labor needs in the Spanish colony.Texto realizado en el marco de los proyectos de investigación, “El segundo imperio colonial español (1776-1898). La transformación del Ultramar español”, Programa PROMETEO 2013/023-Generalitat Valenciana/ Grupos de Excelencia, y “Red de excelencia de estudios sobre esclavitud y raza en Iberoamérica y el Caribe”, MINECO (HAR2015-69172-REDT

En Legítima Representación: los firmantes del fallido proyecto de Junta de La Habana en 1808

During the summer of 1808 in Havana was considered the possibility to restore a governing Junta like it had happened in the Spanish dominions in the Iberian Peninsula. Different authorities, especially the governor and general captain Marques of Someruelos and the Havanan town hall, and some outstanding peoples of the city, they debated the installation of the first Junta of America. The project finally failed, although the list was conserved with the adhesions. This document, it’s without enough critics until now, is the fundamental interest of this work, although not the unique one. We have certainty other people was related to the plan, although they do not appear in the document. With this study we analyzed the social political and economic composition of which they decided for the juntista option in Havana.Durante el verano de 1808 se planteó en La Habana la posibilidad de instaurar una Junta de Gobierno, al igual que había ocurrido en los dominios españoles en la Península Ibérica. Diferentes autoridades, especialmente el gobernador y capitán general marqués de Someruelos y el Cabildo habanero, junto a algunos elementos destacados de la ciudad, debatieron la instalación de la que hubiese sido primera junta de América. El proyecto finalmente fracasó, aunque se conservó la lista de aquellos que mostraron su adhesión. Este documento, apenas sometido a crítica hasta la fecha, es el objeto fundamental de este trabajo, aunque no el único, ya que se tenía constancia de otras personas relacionadas con el plan que no figuran en el mismo. Con este estudio analizamos la composición social, política y económica de aquellos que optaron por la opción juntista en La Habana