Zeewierteelt voor energie en industrie

Bedrijven gaan in de nabije toekomst mogelijk zeewieren kweken in onze Noordzee, op plantages voor de Nederlandse kust. De geteelde inheemse soorten leveren dan duurzame brandstoffen en grondstoffen voor de chemische industrie. Vanuit die visie werkt Ana López Contreras aan het project Zeewier Bioraffinage

New design parameters for biparabolic beach profiles (SW Cadiz, Spain)

165 profiles of seventy-one beaches along the Gulf of Cadiz (SW, Spain) were studied to improve the formulation of the beach profile in tidal seas. Maritime climate, degree of energy exposure and size of the sand grains were taken into account to study the two sections of the biparabolic profile. The objective of the study was the determination of more accurate formulations of the design parameters for the equilibrium profile that involves tidal seas. These formulations were modelled and validated based on existing profiles to quantify the error existing between the real profile and the modelling. This comparative analysis was extended by considering the formulations proposed by other authors. The best results were obtained with the proposal presented herein

The complex dust formation zone of the AGB star IRC+10216 probed with CARMA 0.25 arcsec angular resolution molecular observations

We present low spectral resolution molecular interferometric observations at 1.2 mm obtained with the Combined Array for Research in Millimetre-wave Astronomy (CARMA) towards the C-rich AGB star IRC+10216. We have mapped the emission of several lines of SiS, H13CN, SiO, and SiC2 in the ground and first excited vibrational states with a high angular resolution of 0.25 arcsec. These observations have allowed us to partially resolve the emission of the envelope at distances from the star <50 stellar radii (R*), where the stellar wind is mainly accelerated. The structure of the molecular emission has been modelled with a 3D radiation transfer code. The emission of line SiS(v=0,J=14-13) is best reproduced with a set of maser emitting arcs arranged between 5 and 20 R*. The abundance of H13CN with respect to H2 decreases from 8e-7 at 1-5 R* to 3e-7 at 20 R*. The SiO observations are explained with an abundance <2e-8 in the shell-like region between 1 and 5 R*. At this point, the SiO abundance sharply increases up to (2-3)e-7. The vibrational temperature of SiO increases by a factor of 2 due North-East between 20 and 50 R*. SiC2 is formed at the stellar surface with an abundance of 8e-7 decreasing down to 8e-8 at 20 R* probably due to depletion on to dust grains. Several asymmetries are found in the abundance distributions of H13CN, SiO, and SiC2 which define three remarkable directions (North-East, South-Southwest, and South-East) in the explored region of the envelope. There are some differences between the red- and blue-shifted emissions of these molecules suggesting the existence of additional asymmetries in their abundance distributions along the line-of-sight.Comment: 22 pages, 16 figures, 9 tables, accepted for publication in MNRA

Consolidation of an EV Project Based Learning program integrated within a complete Bachelor Engineering Degree

Proyecto docente para el aprendizaje de competencias fundamentales de la ingeniería a través del aprendizaje basado en un proyecto multianual y multidisciplinar coordinado sobre las asignaturas troncales de este tipo de grados. Los resultados obtenidos son del tipo docente, funcionales y científicos que han permitido fabricar varios modelos de vehículos eléctricos ligeros con los que se ha acudido a competiciones internacionales.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Thickness effect on electric resistivity on polystyrene and carbon black- based composites

Changes on electrical resistivity were experimentally studied for polystyrene and carbon black-based composites respect to the temperature. 22% w/w carbon black composite films at 30 μm, 2mm y 1cm thick were submitted to thermal heating-cooling cycles from room temperature to 100°C, slightly up to Tg of the composite. For each cycle changes on electrical resistivity constituent a hysteresis loop that depends on the sample thickness. The changes during the heating stage could be explained as a consequence of the thermal expansion and mobility of the polymer chains at Tg, producing a disconnecting of the electrical contacts among carbon black particles and an important increasing (200%) of the electrical resistivity. For each cycle, the hysteresis loop was observed in thicker samples, whereas for 30 ? m thickness sample the hysteresis loop was lost after four cycles.CONACY

Influence of Di erent Sieving Methods on Estimation of Sand Size Parameters

Sieving is one of the most used operational methods to determine sand size parameters which are essential to analyze coastal dynamics. However, the influence of hand versus mechanical shaking methods has not yet been studied. Herein, samples were taken from inside the hopper of a trailing suction dredger and sieved by hand with sieves of 10 and 20 cm diameters on board the dredger. Afterwards, these same samples were sieved with a mechanical shaker in the laboratory on land. The results showed di erences for the main size parameters D50, standard deviation, skewness, and kurtosis. Amongst the main results, it should be noted that the highest values for D50 and kurtosis were given by the small sieves method. On the other hand, the lowest values were given by the mechanical shaker method in the laboratory. Furthermore, standard deviation and skewness did not seem to be a ected by the sieving method which means that all the grainsize distribution was shifted but the shape remained unchanged. The few samples that do not follow these patterns have a higher percentage of shells. Finally and definitely, the small sieves should be rejected as a sieving method aboard

Ordenamiento territorial, turismo y ambiente en Valle de Bravo, México

Detrás de ese paisaje idílico de agua, bosques y arquitectura, que la mercadotecnia ofrece y que la tradición evoca, se desarrollaron fuertes conflictos de intereses, necesidades sociales insatisfechas, así como la depredación ambiental constante. En Valle de Bravo pueden observarse paisajes con diferentes visiones y lógicas socioeconómicas, como resultado de un conjunto de políticas de carácter territorial formuladas por el Estado y por la iniciativa privada, con el objetivo de fomentar la actividad turística como eje del desarrollo capitalista. El paisaje creado en algunas zonas ofrece una imagen de prosperidad y confort, mientras que en otras es posible observar la segregación socioterritorial que esta actividad ha generado y que excluye a la mayoría de sus habitantes de los beneficios que el turismo puede traer

Virtual resources for the improvement of teaching in the course of Port and Coastal Engineering (dregree in Civil Engineering)

Port and Coastal Engineering is a subject included in the third year of the degree in Civil Engineering (Civil Constructions and Hydrology specialty) taught at the Polytechnic School of Algeciras. As this is a subject with a very specific syllabus, there is no textbook (or even appropriate references) that contemplates all the related topics of the whole course. Moreover, there are many students who, for different reasons (repeaters, Erasmus, labour obligations, ...), cannot attend the regular classes. This lack of attendance has been leading to another problem: this kind of students have been leaving the subject for several years. In addition, understanding of the basic concepts becomes even more complicated for Erasmus students enrolled in the subject because of the language barrier. In order to solve this problem, a project of teaching innovation has been launched which consists of the creation of a set of evaluable tasks for the different topics addressed to be performed by the students. In this way, the students are motivated to keep up-to-date the course contents. A comparison of the last year results with those of the preceding five years is provided. Finally, an analysis of the significance of the improvement is also presented

El recurso de proteccion como garante de los derechos de contribuyentes en Chile, analisis de jurisprudencia reciente en Talca y Santiago.

54 p.En nuestro país es frecuente que la autoridad incurra en actos arbítrales e ilegales en perjuicio de las personas, cuando estas acciones producen una vulneración de los derechos garantizados por la Constitución, se puede recurrir por la vía del Recurso de Protección para que los derechos sean restablecidos, en la presente memoria se verá esto enfocado desde el ámbito tributario, donde la Autoridad la representa el Servicio de Impuestos Internos y quien se ve vulnerado en sus derechos es el Contribuyente. Este trabajo trata de una forma sencilla, clara y precisa lo que sucede en la práctica, analizando los Recursos presentados y sus respectivos fallos lo que tiene como objetivo principal, descubrir cual es la verdadera aplicación que tiene la Acción de protección en el área del derecho Tributario

Plan de negocio para prestar un servicio de consultaria especializada en Customer Relationship Management, Region del Maule

148 p.Actualmente el conservar a los clientes se ha tornado de vital importancia para la subsistencia de las empresas en este mundo cada vez mas globalizado y competitivo, lo cual hace necesario la fidelización de estos, a través de una atención preferencial y dirigida, dando paso a lo que en el mundo del Marketing se conoce como Administración de las Relaciones con los Clientes, CRM, por siglas en ingles. Muchas empresas han adoptado esta filosofía como estrategia comercial, pero varias de ellas han fracasado, debido principalmente, a una carente gestión en la implementación de este tipo de proyectos, carencia que pasa por una suposición que la adquisición de un Software lo es todo, resistencia al cambio o falta de compromiso por parte de la plana ejecutiva, entre otros. Cabe mencionar que a nivel de la Región del Maule, la situación es diferente, ya que por parte de las PYMES el solo conocimiento de CRM, es muy bajo, no así el interés que tienen por aprender técnicas de fidelización del cliente, es aquí donde se concentra la idea de negocios de una Consultora especializada en CRM, enfocada a las PYMES, de la VII Región. El objetivo principal de esta memoria de grado es elaborar un plan de negocio para la prestación de un servicio de Consultaría especializada en CRM, en la Región del Maule, el cual se desarrollara con el apoyo de información primaria, (investigaciones exploratorias, entrevistas en profundidad) e información secundaria (memorias de grados, directorio de empresas, estudio, otros). La información recopilada y la correspondiente elaboración del plan de negocios, lleva a la conclusión que es un negocio rentable, ya que existe una potencial demanda por este servicio, y en este momento no hay competencia directa en la Región, solo se encuentran alrededor de 9 organizaciones que prestan un servicio relacionado con tecnologías de información (TI), lo cual se muestra como un panorama favorable para la implementación de este proyecto, dado la necesidad detectada