Applications of impedance spectroscopy in thermoelectricity

t is widely used in a lot of different fields (solar cells, fuel cells, corrosion, supercapacitors, batteries, etc.). • Powerful and very reliable equipment are available in the market. • It allows the separation of the physical processes occurring in a device

Tidal estimation in the Pacific with application to SEASAT altimetry

The techniques for computing the eigenfunctions of the velocity potential (Proudman functions) set out in Sanchez, et al. (1986) in relation to the Atlantic-Indian Oceans are here applied to the Pacific Ocean, using a 6x6 degree grid of 510 points (455 points for the associated stream functions). Normal modes are computed from the first Proudman functions and have natural periods from 43.9h downward. Tidal syntheses are derived from these modes by direct application of the (frictionless) dynamic equations and by least-squares fitting of Proudman functions to the dynamically interpolated tide-gauge data of Schwiderski (1983). The modes contributing the most energy to the principal harmonic tidal constituents are different in the two computations: their natural periods are typically in the range of 9 to 16h for semidiurnal, and 14 to 43h for diurnal tides. The rms of fit for the Proudman functions is, in all cases, better than the corresponding value for the same number of spherical harmonics

Analysis of timber as sustainable material for construction

Comunicació presentada a IN-TECH 2014 International Conference on Innovative Technologies (Leiria, Portugal 10-13, september 2014).Facing the climate change scenario, professionals and technicians of civil engineering and architecture are searching for ecological solutions and construction methods that would allow for higher energy-efficiency and then reduce environmental impacts. Timber represents one of the best choices for energy-efficient construction, since it also functions as a material with good thermal transmittance properties if compared to other construction materials. This work analyses the possibilities and benefits that wood offers for the construction industry, in terms of sustainability. On the one hand, the sustainable forest management system contributes to ensure the quality and well-management in the exploitation of the forest in order to produce timber and other sub-products such as cork, paper and tree resins. In relation to this, the construction industry has an important role to increase the level of sustainable products by demanding certified timber. On the other hand, due to its Life Cycle Assessment (LCA), timber has the lower energy consumption compared to other building materials, as well as the CO2 stored and saved contributes to mitigate climate change. The LCA stages for the production of timber, the potential of saving carbon emissions and its comparison with other building products are presented. Concerning energy efficiency, once timber is implemented in a building taking part of the structure or as cladding material, it provides a high insulation decreasing the thermal transmittance of the walls, roofs, floors and windows. Its versatility as construction material also enables obtaining innovative solutions which can be implemented in buildings, as it is presented in this study. The optimum energy performance and low carbon emissions of timber make from this product a suitable and sustainable material to be highly considered for the construction industry

A Storyteller: Mario Vargas Llosa Between Civilization And Barbarism

In A Story-Teller, Braulio Munoz offers a critical appraisal of Mario Vargas Llosa\u27s literary and political production from a sociotheoretical perspective. He engages the debate concerning the role of the writer in Latin America, the merits and shortcomings of modernist and postmodernist thought, and the differences between neoliberalism and alternative democractic positions

Audio-based classroom activity detection for primary school lessons

Classroom Activity Detection (CAD) is a challenging task, especially for primary school lessons, where student participation is fragmented, short, and often concurrent with teacher speech and background noise. This thesis proposes and evaluates three CAD models: two based on supervised audio classification (trained on a proprietary dataset that was annotated for this work), and one based on unsupervised diarization. These models are assessed through the visualization of the estimated label density, rather than typical CAD segment visualizations. This approach proves to be more effective in dealing with the highly fragmented segments observed in this specific use case. The main metric to compare these models is the correlation coefficient between estimated and ground-truth label densities. The density and correlation are used to evaluate the accuracy of the models in capturing the temporal distribution of the different classroom activities. Complimentary to that, another metric that is also used is the error in the total time estimated for each label (e.g., estimated Teacher Talking Time or TTT). The supervised models, based on an LSTM neural network and a decision tree classifier, achieve similar classification performance, outperforming the unsupervised diarization pipeline. Even a small amount of training data is enough for the supervised models to achieve the performance of the diarization system, and they generalize well to previously unseen voices. The unsupervised diarization model does not require training data for this particular task, but its performance is not as good as the supervised models to detect the teacher’s voice. Additionally, it cannot distinguish properly between the labels “single student” and “group work”. Overall, the supervised CAD models proposed in this thesis demonstrate promising results for primary school lessons, even with limited training data. These models could be used to develop valuable tools to support classroom observation and evaluation.Beca de Maestría ANI

La motivación de las sentencias: una doble equivalencia de garantía jurídica

Históricamente la motivación de sentencias tiene como origen la incorporación de un elemento propio de Derecho procesal, y en el siglo XIX con la práctica del recurso de casación pasó a desarrollar un papel esencial como parte originaria de la jurisprudencia y del trabajo del Tribunal Supremo.Historically, the incorporation of a characteristic element of the procedural law has given rise to the justification of sentences. In nineteenth century it played a main role as a original part of the Spanish Supreme Court’s case-law.En alemán: Historisch betrachtet bilden die Urteilsbegründungen ein eigenständiges Element innerhalb des Prozessrechts. Im 19. Jahrhundert, durch die Praxis der Revision, gelangten sie zu besonderer Bedeutung als Teil der Rechtsprechung des Obersten Gerichtshofs