El derecho al aprovechamiento urbanístico de los bienes de dominio público obtenidos onerosamente, con especial referencia a Canal de Isabel II

El objeto del presente trabajo es analizar y justificar desde un punto de vista jurídico el derecho al aprovechamiento urbanístico de los bienes de dominio público, con especial referencia a Canal de Isabel II como propietario de bienes de dominio público, obtenidos onerosamenteMáster en Política Territorial y Urbanística. 21ª ed. Curso 2010/201

Células solares de puntos cuánticos coloidales

Treball Final de Màster Universitari en Física Aplicada. Codi: SIN019. Curs acadèmic 2012-2013Scarcity of oil reserves together with the increasing environmental awareness are motivating the scientific community to dedicate much effort toward the development of new technologies for producing energy from renewable sources, including photovoltaics. So far, the main handicap of this technology is the high economical cost, therefore the researchers are focusing on the development of cheaper materials and innovative technologies. Among all the available materials, colloidal quantum dots are expected to be excellent candidates for photovoltaics,due to the combination of low-cost processing, high extinction coefficients, band-gap tunability and relatively high stability. The present work focuses on the study of the working principles of quantum dot based solar cells in the solid state (without liquid electrolytes), by following a standard procedure to prepare the corresponding devices in a reproducible and systematic way. Different samples have been prepared under different conditions and treatments to elucidate their effect on the performance of the devices, which were characterized using different optoelectronic techniques. Devices are prepared on basis to the typical depleted heterojunction configuration (Figura 1), which consists of a mesoporous electron transport layer (TiO2) deposited on a conductive glass (FTO), a PbS quandum dot layer and finally a metalic contact (Au) evaporated on the top. In order to reduce the number of short-circuited devices, a compact layer of TiO2 was included between the mesoporous TiO2 layer and the FTO. The nanostructured TiO2 electrode was functionalized with organic ligands, which promoted an improvement on the FF values and consequently, a significant increase of the device efficiency. Moreover, several parameters such as the amount of photoactive material, the significance of using a mesoporous layer of TiO2 or the effect of the nature of the inter-dot ligands, among others, were studied and optimized. After the realization of this work, we were able to prepare devices in a reliable and systematic manner with maximum efficiencies of 2,1%

Psychological aspects in unidentified anomalous phenomena (UAP) witnesses

In this study, we surveyed a total of 245 people about unidentified anomalous phenomena (UAP), 93 who directly witnessed UAP. Paying special attention to the psychological impact of UAP, our study survey covered different aspects, including opinions on official UAP releases, the scientific approach to the phenomena and the search for extra-terrestrial intelligence. This study found that UAP had a clear psychological impact on witnesses, with a transformative effect, and a benign form of a non-pathological obsessive-like interest in the topic we defined as the UAP deep psychological engagement triad. This deep psychological engagement triad is characterized by UAP topic being present in a witness's mind daily, with a self-recognized interest and appreciation for the topic and a need to talk about UAP topic, not necessarily the event they experienced. UAP appear to have a very specific impact focused on extra-terrestrial aspects and the phenomena itself, which is experienced as a life-changing event by direct witnesses. These psychological aspects are quantitatively and qualitatively objectifiable, and further research is needed in this direction since all research efforts appear currently focused on the physical aspects of these phenomena. Copyright7 página

Solitary Waves in Massive Nonlinear S^N-Sigma Models

The solitary waves of massive (1+1)-dimensional nonlinear S^N-sigma models are unveiled. It is shown that the solitary waves in these systems are in one-to-one correspondence with the separatrix trajectories in the repulsive N-dimensional Neumann mechanical problem. There are topological (heteroclinic trajectories) and non-topological (homoclinic trajectories) kinks. The stability of some embedded sine-Gordon kinks is discussed by means of the direct estimation of the spectra of the second-order fluctuation operators around them, whereas the instability of other topological and non-topological kinks is established applying the Morse index theorem

A generalized Holling type II model for the interaction between dextral-sinistral snails and Pareas snakes

Producción CientíficaPareatic snakes possess outstanding asymmetry in the mandibular tooth number, which has probably been caused by its evolution to improve the feeding on the predominant dextral snails. Gene mutation can generate chiral inversion on the snail body. A sinistral snail population can thrive in this ecological context. The interactions between dextral/sinistral snails and Pareas snakes are modeled in this paper by using a new generalized functional response of Holling type II. Distinct Pareas species show different bilateral asymmetry degrees. This parameter plays an essential role in our model and determines the evolution of the populations. Stability of the solutions is also analyzed for different regimes in the space of parameters.Ministerio de Economía, Industria y Competitividad (grant MTM2014-57129-C2-1-P)Junta de Castilla y Leon (grant VA057U16

La articulación, requisito básico de un producto de investigación educativa

The scientific production, in the field of education, constantly refers to linkage as a special condition to develop research. However, its meaning and the way to achieve that condition are not always clear, particularly for those who are in a training stage of research in education. Meanwhile, the academic production reviewers consider linkage as a very important aspect and essential characteristic of any research project. This paper suggests that linkage involves an epistemological discussion on the research factors in each one of the research stages, such as the construction of the object of study, the definition of methodology, and the data analysis and interpretation, among the most important stages. Linkage takes shape in a written product showing the results from an orderly construction and communication of thought, according to the rules established in a particular field of knowledge.Recibido 27 de agosto de 2011 • Aceptado 23 de febrero 2012 • Corregido 02 de abril de 2012     Dentro de la producción científica en el campo de la educación se hace constante referencia a la articulación como una condición esencial en el desarrollo de una investigación. No obstante, el significado de esta condición y la forma de conseguirla es un asunto que no siempre queda claro, sobre todo para quienes se encuentran en una etapa de formación en la investigación educativa. Mientras, quienes fungen como lectores y lectoras que realizan crítica de la producción académica señalan la articulación como aspecto relevante y la solicitan como rasgo fundamental en cualquier trabajo de investigación. Para aportar a la discusión sobre este aspecto, la reflexión de este trabajo propone que la articulación comprende, por una parte, una reflexión epistemológica sobre los componentes de la investigación en cada una de sus etapas, como la construcción del objeto de estudio, la definición de la metodología, el análisis de los datos y su interpretación, entre las más importantes. Por otra parte, la articulación se cristaliza en un producto escrito que refleja los resultados de una construcción y comunicación ordenada de pensamiento, acorde con las reglas establecidas en un campo de conocimiento.   &nbsp

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Mutual Coupling Reduction Techniques in Electronic Steering Antennas in X Band

This work provides the development of an antenna for satellite communications onboard systems based on the recommendations ITU-R S.580-6 [1] and ITU-R S.465-5 [2]. The antenna consists of printed elements grouped in an array, working in a frequency band from 7.25 up to 8.4 GHz (15% of bandwidth). In this working band, transmission and reception are included simultaneously. The antenna reaches a gain about 31 dBi, has a radiation pattern with a beam width smaller than 10oand dual circular polarization. It has the capability to steer in elevation through a Butler matrix to 4

On the MIMO Capacity for Distributed System under Composite Rayleigh/Rician Fading and Shadowing

Wireless channels are commonly affected by short-term fading and long-term fading (shadowing). The shadowing effects must be taken into account also when mobility is present in the wireless scenario. Using a composite fading model, the total channel capacity can be studied for a scenario with short-term Rayleigh fading along with shadowing. This work provides quantitative results for these kinds of scenarios with Rayleigh fading and shadowing, considering also multiple-input and multiple-output systems, which have not been previously reported. In addition, the channel capacity has been studied in depth in its relation with the shadowing level, signal to noise ratio, and the number of elements in the multiple-input and multiple-output system. Moreover, the channel performance with shadowing has been compared to the one without it. Furthermore, Rician model with shadowing is studied and its results are reported. In addition, correlated and experimental results are provided. It is identified that the distributed MIMO systems can benefit from shadowing in Rician channels. This advantage has not been reported previously. This type of fading is proposed for massive MIMO by others and our results open the door to emulate massive MIMO on a reverberation chamber.This work has been supported by “Gobierno de Extremadura” with project number IB13113, PYR-2014 GENIL project (PYR-2014-CEB09-0010/MICINN), and CEIbioTIC project (mP_TIC_11)