http://hdl.handle.net/2117/163 2013-05-22T03:52:46Z http://hdl.handle.net/2117/15144 Title: Informe socio-residencial del barrio centro de Fuenlabrada Authors: Garcia-Almirall, M. Pilar Abstract: INFORME SOCIO-RESIDENCIAL DEL BARRIO CENTRO DE FUENLABRADA http://hdl.handle.net/2117/15493 Title: Poster CONSTRUMAT Start-up Panel Authors: Burns, Malcolm Abstract: Poster CONSTRUMAT Start-up Panel http://hdl.handle.net/2117/15329 Title: Literature revision_Agent-based models Authors: Chica Mejía, Juan Eduardo Abstract: Literature revision_Agent-based models http://hdl.handle.net/2117/15483 Title: Delimitación de los sistemas urbanos de la costa ibérica: España y Algarve (Portugal) Authors: Moix Bergadà, Montserrat Abstract: DELIMITACIÓN DE LOS SISTEMAS URBANOS DE LA COSTA IBÉRICA: ESPAÑA Y ALGARVE (PORTUGAL) http://hdl.handle.net/2117/15381 Title: Dictamen técnico estructural Authors: Muñoz Salinas, Francisco Abstract: Dictamen estructural para determinar el estado de la estructura de un edificio y si ella pudo ser la causa de unas supuestas patologías en el edificio de viviendas plurifamiliar ubicado en la calle GERMANS THOS Y CODINA nº 6 de Mataró en la provincia de Barcelona, España. http://hdl.handle.net/2117/19236 Title: Working in the city: The knowledge city, experience from Barcelona's Metropolitan Centre Authors: Marmolejo Duarte, Carlos Ramiro 2013-05-15T10:19:43Z http://hdl.handle.net/2117/19205 Title: L'Emigració de Barcelona: Causes i característiques. El mercat de l'habitatge com a factor incentivador de l'emigració Authors: Garcia-Almirall, M. Pilar 2013-05-14T12:02:09Z http://hdl.handle.net/2117/19197 Title: Reactions of fly ash with calcium aluminate cement and calcium sulphate Authors: Fernández Carrasco, Lucía; Vázquez Ramonich, Enric Abstract: The hydration processes in the ternary system fly ash/calcium aluminate cement/calcium sulphate (FA/CAC/C$) at 20 °C were investigated; six compositions from the ternary system FA/CAC/C$ were selected for this study. The nature of the reaction products in these pastes were analysed by X-ray diffraction (XRD) and infrared spectroscopy (FTIR). At four days reaction time, the main hydration reaction product in these pastes was ettringite and the samples with major initial CAC presented minor ettringite but calcium aluminates hydrates. The amount of ettringite developed in the systems has no direct relation with the initial components. 2013-05-14T10:28:31Z http://hdl.handle.net/2117/19196 Title: Carbonation of ternary building cementing materials Authors: Fernández Carrasco, Lucía; Torrens Martín, David; Martínez Ramírez, Sagrario Abstract: The carbonation processes of ettringite and calcium aluminate hydrates phases developed by hydration of calcium aluminate cement, fly ash and calcium sulphate ternary mixtures have been studied. The hydrated samples were submitted to 4% of CO2 in a carbonation chamber, and were analysed, previous carbonation and after 14 and 90 days of carbonation time, by infrared spectroscopy and X-ray diffraction; the developed morphology was performed with the 14 days carbonated samples. The results evidenced that ettringite reacts with CO2 after 14 days of exposition time and evolves totally at 90 days; the developed hydrated phases C3AH6 in samples with major CAC content, also reacts with CO2. Due to carbonation, calcium carbonate – mainly vaterite but also aragonite-, depending on the initial formulation, aluminium hydroxide and gypsum were detected. 2013-05-14T10:07:32Z http://hdl.handle.net/2117/19189 Title: Supercritical Carbonation of Calcium Aluminate Cement Authors: Fernández Carrasco, Lucía; Miravitlles, C; Rius, J. Abstract: The microstructural changes occurring during supercritical carbonation (scCO2) of calcium aluminate cement (CAC) and changes to its strength have been investigated. Cylindrical specimens of CAC cured at different temperatures were prepared and then subjected to scCO2. It is shown that CAC carbonation in supercritical conditions is accelerated with a positive effect on the compressive strength. Due to the scCO2 treatment, both conversion and alkaline hydrolysis are avoided. The best behaviour of the studied specimens was attained for samples cured at 25 °C. The residual compounds after the scCO2 process, i.e. monocalcium aluminate, calcium carbonate and aluminium hydroxide are durable in normal ambient conditions. Complete carbonation of CAC is particularly important for the reinforcement of CAC with polymer fibres to improve its mechanical strength. 2013-05-14T07:52:00Z http://hdl.handle.net/2117/19188 Title: A Discussion of the Paper "Hydration Reactions of Nonstoichiometric Barium Orthoaluminates" by T.R.N. Kutty and M. Nayak Authors: Fernández Carrasco, Lucía 2013-05-14T07:43:11Z http://hdl.handle.net/2117/19187 Title: Synthesis and Crystal Structure Solution of Potassium Dawsonite: an intermediate compound in the alkaline hydrolysis of Calcium Aluminate Cements Authors: Fernández Carrasco, Lucía; Puertas, F; Blanco-Varela, M T; Vázquez, T; Rius, J. Abstract: Potassium dawsonite is formed as an intermediate compound during the alkaline hydrolysis (AH) in calcium aluminate cements (CACs). A synthesis method of potassium dawsonite has been developed. The crystal structure of potassium dawsonite KAl(CO3)(OH)2 has been solved by direct methods from X-ray powder diffraction data and refined with the Rietveld method. It crystallises in the orthorhombic Cmcm space group with unit cells parameters a=6.3021(3) Å, b=11.9626(5) Å, c=5.6456(3) Å and Z=4. The structure consists of carboaluminate chains, formed by the basic unit [Al2(OH)4(CO3)2]2− arranged along the c axis. The carbonate groups are placed in an alternate manner at both sides of the carboaluminate chains. The carboaluminate chains are also held together by the K+ cations that are located in the middle of three such chains. Finally, the chemical reactions explaining the AH process in CACs are postulated. 2013-05-14T07:31:53Z http://hdl.handle.net/2117/19147 Title: Scaling laws and the modern city Authors: Isalgue Buxeda, Antonio; Coch Roura, Helena; Serra Florensa, Rafael Abstract: A detrended fluctuation analysis (DFA) is applied to the statistics of Korean treasury bond (KTB) futures from which the logarithmic increments, volatilities, and traded volumes are estimated over a specific time lag. In this study, the logarithmic increment of futures prices has no long-memory property, while the volatility and the traded volume exhibit the existence of the long-memory property. To analyze and calculate whether the volatility clustering is due to a inherent higher-order correlation not detected by with the direct application of the DFA to logarithmic increments of KTB futures, it is of importance to shuffle the original tick data of future prices and to generate a geometric Brownian random walk with the same mean and standard deviation. It was found from a comparison of the three tick data that the higher-order correlation inherent in logarithmic increments leads to volatility clustering. Particularly, the result of the DFA on volatilities and traded volumes can be supported by the hypothesis of price changes. 2013-05-09T10:56:38Z http://hdl.handle.net/2117/19134 Title: El detall estratègic Authors: Tudó Galí, Roger; Ricart Ulldemolins, Josep; Aguiló Aran, Claudi; Claret Martí, Jordi 2013-05-08T11:43:44Z http://hdl.handle.net/2117/19105 Title: La localización intrametropolitana de las actividades de la información: un análisis para la Región Metropolitana de Barcelona 1991-2001 Authors: Marmolejo Duarte, Carlos Ramiro; Pérez Prieto, Claudia Beatriz Abstract: En este artículo se analiza la localización intrametropolitana de las actividades de la información y su dinámica de descentralización. Con este objetivo se propone una aproximación novedosa por cuanto pone el énfasis en la forma en cómo se producen las cosas o se prestan los servicios más que en el sector económico al cual pertenece la actividad. El ámbito de estudio es la Región Metropolitana de Barcelona, en el periodo comprendido entre los años 1991 y 2001. Los resultados sugieren que las actividades inmateriales, además de incrementar su protagonismo en la estructura económica metropolitana, poseen patrones de localización compactos, incluso están más concentradas que las actividades comerciales. Asimismo existe una clara concomitancia entre la estructura empresarial de cada sector económico y su tendencia locativa, cuanto más actividades relacionadas con la gestión de la información y el conocimiento tiene un sector, más acentúa su concentración espacial. Por otra parte, el análisis dinámico ha detectado que, del conjunto de actividades metropolitanas, las funciones relacionadas con la gestión de la información presentan el menor nivel de descentralización, con lo cual, el centro gana especialización, al recentralizar relativamente a las actividades con más alto valor añadido. De manera que la metrópoli adopta una estructura multipolar compleja, en donde el centro emerge como el epicentro de la ciudad del conocimiento, apoyado por los principales subcentros metropolitanos, que en conjunto estructuran y dan soporte a un territorio intersticial progresivamente especializado en actividades industriales de alta tecnología. 2013-05-06T13:27:02Z