KRESS, Gunther R. (2010). Multimodality: A Social Semiotic Approach to Contemporary Communication

KRESS, Gunther R. (2010). Multimodality: A Social Semiotic Approach to Contemporary Communication. London & New York: Routledge. 213 pp. ISBN 978-0-415-32061-0

Servidor de datos y página web para el aprendizaje de SIG en la ingeniería forestal

Los Sistemas de Información geográfica (SIG) son una herramienta de trabajo habitual en el ámbito de la ingeniería forestal, tanto en la faceta de redacción de proyectos, como en la investigación sobre el medio ambiente y el territorio. Cada vez hay más información cartográfica disponible desde servidores de diferentes instituciones, por lo que consideramos que es muy útil contar con una herramienta de organización de la información. En el trabajo que se presenta, se pretende proporcionar a los estudiantes e investigadores en materia forestal un portal que contenga información actualizada y ordenada sobre los recursos existentes compatibles con los SIG. Por tanto constituiráuna herramienta de apoyo que facilitarála fase de documentación, búsqueda de datos compatibles y aprendizaje de las herramientas que sirven de base para el desarrollo de cualquier trabajo técnico o de investigación relacionado con el medio ambiente y el territorio que se apoye en los SIG

Molecular dynamics of ferroelectric polymeric systems as studied by incoherent quasielastic neutron scattering

11 págs.; 15 figs.We have studied by incoherent quasielastic neutron scattering the molecular dynamics of the ferroelectric copolymers of vinylidene fluoride and trifluoroethylene with two different molar ratios. Thermal hysteresis effects accompanying the structural changes observed in these materials are found. In the temperature range investigated three motions were identified: (i) a vibrational motion of Debye-Waller type which shows increasing amplitude until the vicinity of the Curie temperature and then it follows a Q4 law, (ii) a slow jump diffusive motion of each chain in the restricted volume defined by other chains, thermally activated with an activation barrier of 8 kcal/mol, and (iii) a fast local diffusive motion with only some fraction of the chains concerned. © 1994 The American Physical Society.Grateful acknowledgments is due to DGICYT (Grant No. PB91-0355), to CICYT (Grant No. MAT92-148), to CICYT (Grant No. MAT94-0740E), to the Consejeria de Educacion de la Comunidad de Madrid (Grant No. 284/92) and to Fundacion Domingo Martinez (Grant No. 1992/93) for the generous support of this investigation.Peer Reviewe

Determinación del equilibrio líquido-vapor de sistemas conteniendo un disolvente procedente de la biomasa y un alcohol de cadena corta

En este Trabajo Fin de Master se ha realizado el estudio del equilibrio líquido-vapor en distintas condiciones experimentales (presión constante o temperatura constante) de diversos sistemas formados a partir de un compuesto procedente de la biomasa (lactato de metilo o lactato de etilo) y un alcohol de cadena corta (metanol o etanol). También se han realizado predicciones del equilibrio líquido-vapor para los sistemas investigados usando un método de contribución de grupos (método UNIFAC) para su posterior comparación con los datos experimentales

Self-assembly of thermo and light responsive amphiphilic linear dendritic block copolymers

The synthesis and structural characterization of a new dual responsive linear-dendritic block copolymer (LDBC) is presented. The LDBC is constituted by a thermoresponsive linear block from polymethacrylate of oligo- and diethylene glycol, and a light responsive den- dron block of bis-MPA decorated at the periphery with 4-isobutyloxyazobenzene and alkyl chains in a 50:50 M ratio. Blocks are coupled together by copper(I) catalyzed alkyne–azide cycloaddition (CuAAC). The ability of the LDBC to form vesicle self-assemblies in water is described, as well as the effect of light and temperature on the vesicles morphology, on the basis of transmission electron microscopy (TEM), dynamic light scattering (DLS) and UV–vis spectroscopy studies. The effect of UV light and temperature on the vesicles struc- ture by SAXS and WAXS conducted on real time is also presented. Finally, the potential use of the vesicles to load and stimuli controlled release of small fluorescent molecules is probed

El análisis de visibilidad en la evaluación de impacto ambiental de nuevas construcciones

Nowadays there is a need to take account of the ecological balance in urban development, and to adopt a type of urban planning which is spread over a broad territorial base in order to control the localisation and regulation of uses and activities. In view of this requirement, the objective of the work described in the present article is to propose locations for nine low-density urban areas in the surroundings of the Corredor del Henares in Guadalajara (Spain). One of the most significant components of the capacity and impact models designed for this purpose is the visual quality of the landscape, which is based on an exhaustive study of the visibility of the territory. The object of analysing the visibility is to determine which areas can be seen from each point or set of points, either simultaneously or in sequence, in order to assess the degree to which each area contributes to the perception of the landscape, and to obtain certain global parameters which allow a territory to be characterised in visual terms. By extension of this objective, the aim of the work is to contribute to the field of visibility studies by designing a visibility model which is subsequently programmed and implemented in GIS (Geographical Information System). We describe the process used to perform this task, with particular emphasis on the difficulties which arose and how they were resolved. The visibility analysis we developed was an important element both in the model for the capacity of acceptance of the activity, and in the model for assessing the possible impact of the activity on the environment. The construction of a visibility model allows an objective assessment of the visibility of the territory from all the points of interest.Hoy en día es necesario reconciliar el desarrollo urbano con el equilibrio ecológico y adoptar un urbanismo con base territorial amplia, para controlar la localización y regulación de los usos y actividades. Dentro de este contexto, el trabajo que se expone en el presente artículo, se planteó como objetivo último la localización de nuevas áreas urbanas de baja densidad en el entorno del Corredor del Henares de Guadalajara (España). Los modelos de capacidad e impacto diseñados al efecto consideran como uno de sus componentes más importantes la calidad visual del paisaje, que se basa, a su vez, en un estudio exhaustivo de la visibilidad del territorio. El objeto de los análisis de visibilidad es determinar las áreas visibles desde cada punto o conjunto de puntos, bien simultáneamente o en secuencia, con vistas a la posterior evaluación de la medida en que cada área contribuye a la percepción del paisaje y a la obtención de ciertos parámetros globales que permitan caracterizar un territorio en términos visuales. Siguiendo la línea enunciada, el trabajo trata de realizar una aportación en el campo de los estudios de visibilidad, mediante el diseño de un modelo de visibilidad, posteriormente programado e implementado en SIG (Sistemas de Información Geográfica); se describe el proceso seguido para realizar esta tarea, centrándose en las dificultadas que se presentaron y su resolución. El análisis de visibilidad desarrollado constituyó un punto importante tanto en el modelo de capacidad de acogida de la actividad como en el modelo del impacto que ésta puede producir en el medio. La construcción de un modelo de visibilidad permite valorar de forma objetiva la visibilidad del territorio desde todos los puntos de interés

Quantitative Nanomechanical Properties of Multilayer Films Made of Polysaccharides through Spray Assisted Layer-by-Layer Assembly.

Nanomechanical properties of alginate/chitosan (Alg/Chi) multilayer films, obtained through spray assisted layer-by-layer assembly, were studied by means of PeakForce quantitative nanomechanical mapping atomic force microscopy (PF-QNM AFM). Prepared at two different alginate concentrations (1.0 and 2.5 mg/mL) and a fixed chitosan concentration (1.0 mg/mL), Alg/Chi films have an exponential growth in thickness with a transition to a linear growth toward a plateau by increasing the number of deposited bilayers. Height, elastic modulus, deformation, and adhesion maps were simultaneously recorded depending on the number of deposited bilayers. The elastic modulus of Alg/Chi films was found to be related to the mechanism of growth in contrast to the adhesion and deformation. A comparison of the nanomechanical properties obtained for non-cross-linked and thermally cross-linked Alg/Chi films revealed an increase of the elastic modulus after cross-linking regardless alginate concentration. The incorporation of iron oxide nanoparticles (NPs), during the spray preparation of the films, gave rise to nanocomposite Alg/Chi films with increased elastic moduli with the number of incorporated NPs layers. Deformation maps of the films strongly suggested the presence of empty spaces associated with the method of preparation. Finally, adhesion measurements point out to a significant role of NPs on the increase of the adhesion values found for nanocomposite films.journal article2017 01 092016 12 15importe