Statistical strategies for pruning all the uninteresting association rules

We propose a general framework to describe formally the problem of capturing the intensity of implication for association rules through statistical metrics. In this framework we present properties that influence the interestingness of a rule, analyze the conditions that lead a measure to perform a perfect prune at a time, and define a final proper order to sort the surviving rules. We will discuss why none of the currently employed measures can capture objective interestingness, and just the combination of some of them, in a multi-step fashion, can be reliable. In contrast, we propose a new simple modification of the Pearson coefficient that will meet all the necessary requirements. We statistically infer the convenient cut-off threshold for this new metric by empirically describing its distribution function through simulation. Final experiments serve to show the ability of our proposal.Postprint (published version

Discovering unbounded episodes in sequential data

One basic goal in the analysis of time-series data is to find frequent interesting episodes, i.e, collections of events occurring frequently together in the input sequence. Most widely-known work decide the interestingness of an episode from a fixed user-specified window width or interval, that bounds the subsequent sequential association rules. We present in this paper, a more intuitive definition that allows, in turn, interesting episodes to grow during the mining without any user-specified help. A convenient algorithm to efficiently discover the proposed unbounded episodes is also implemented. Experimental results confirm that our approach results useful and advantageous.Postprint (published version

Programa de prevención de la depresión postparto en mujeres embarazadas

La Depresión Postparto (DPP) es uno de los problemas de salud mental que, aunque sigue siendo un tema tabú en la actualidad, afecta en torno al 15 % de las mujeres. Por ello, en el presente trabajo se propone el desarrollo de un programa de prevención de la depresión postparto en mujeres embarazadas. Para su diseño, se tuvo en cuenta la revisión de la literatura científica y se realizó una detección de necesidades. Esta se llevó a cabo a través de una serie de preguntas abiertas a profesionales de enfermería que trabajan en el área perinatal. El objetivo principal es la elaboración de un programa de prevención de la depresión postparto, que incluirá el abordaje de variables como la mejora de autoestima-confianza, apoyo social, mitos sobre la maternidad, regulación emocional y manejo del estado de ánimo mediante la relajación que permita a estas mujeres lidiar con esa situación de forma más eficaz. El programa propuesto está destinado a mujeres embarazadas de 18 a 40 años, con una sesión semanal de una hora y media de duración

Estudi de viabilitat de reforma i canvi d’us de la masia de Can Güell

Aquest projecte té com a finalitat la reforma de la masia de Can Güell, situada al municipi de Torrelles de Llobregat. L’objectiu és donar un nou ús a la masia i transformar-la en un petit hotel rural. Es pretén que la reforma afecti el menys possible al medi ambient, per tant s’ha fet un estudi de viabilitat que permet analitzar que en l’execució es consumeixi el mínim CO2. La Masia de Can Güell és una construcció totalment aïllada que data del segle XVIII. L’ edifici està constituït per diversos cossos: El cos central consta de Planta Baixa, Planta Pis i Planta Primera. Adherit al cos central hi ha la masoveria que consta de Planta Baixa i Planta Primera. El total de superfície construïda és de 1700m2 aproximadament. El projecte de reforma pretén fer una reforma integral on només es conservarà l’ estructura de murs de càrrega, les façanes i alguns forjatsThe first objective of this project is to create a new interior layout that suits the new use of the house as a rural hotel. All this work, preserving the current structure and facades and taking into account elements such as the location of the building, its historical context and the elements of nature heritage. The second objective is to propose reforms to ensure that in the performance of materials and in the habitual use of the building, it will be issued the minimum CO2. The last objective is to provide to the building the necessary facilities for its operation, and the design of these is fulfilling the following environmental criteria: avoid CO2 emissions and greater efficiency in both production and consumption. The reform will comply with current regulations

The El Masnou Infralittoral sedimentary environment (Barcelona province, NW Mediterranean Sea): morphology and Holocene seismic stratigraphy

A detailed analysis of the morphology and the Holocene seismic and sequence stratigraphy and architecture of the infralittoral sedimentary environment of the El Masnou coast (Catalonia, NW Mediterranean Sea) was carried out using multibeam bathymetry and GeoPulse seismic data. This environment extends down to 26-30 m water depth, and is defined morphologically by two depositional wedges whose seafloor is affected by erosive furrows, slides, fields of large- and small-scale wavy bedforms, and dredging trenches and pits. Erosive terraces are also identified in the transition domain toward the inner continental shelf. The Holocene stratigraphy of the infralittoral environment is defined by two major seismic sequences (lower and upper), each one formed by internal seismic units. The sequences and units are characterised by downlapping surfaces made up of deposits formed by progradation of coastal lithosomes. The stratigraphy and stratal architecture, displaying a retrogradational arrangement with progradational patterns of minor order, were controlled by different sea-level positions. The stratigraphic division represents the coastal response to the last fourth-order transgressive and highstand conditions, modulated by small-scale sea-level oscillations (≈1-2 m) of fith to sixth order. This study also highlights the advantage of an integrated analysis using acoustic/seismic methods for practical assessment of the anthropogenic effects on infralittoral domains based on the association of marine geological observations

Simple low-power demodulator for the measurement of basal and physiological changes of electrical bioimpedance

Wearable sensors constitute a growing trend both as a research tool as well as an end-consumer products. In the physiological signal monitoring fields, the changing signals have a low bandwidth hence most sensing techniques are not powerhungry. Electrical bioimpedance is a non-obtrusive sensing technique and is an interesting choice as it can recover both breathing and pulse rate signals. However, it works at comparatively higher frequencies and usually need demodulation circuitry, meaning higher power consumption. In this work, we show an alternative technique to demodulate the impedance response that need very few components and whose power consumption can be tailored as needed. We show that, by using a 24-bit ADC, the respiration and pulse rate signals as well as the basal impedance are recovered from the demodulated signal and further digital band-pass filters that are easily implemented with currently available low-power microcontroller technology. Further, it constitutes a compact solution, as the sensor needs not to change location to measure these signals.Peer ReviewedObjectius de Desenvolupament Sostenible::3 - Salut i BenestarPostprint (published version