Grothendieck ring class of Banana and Flower graphs

We define a special type of hypersurface varieties inside $\mathbb{P}_k^{n-1}$ arising from connected planar graphs and then find their equivalence classes inside the Gr\"othendieck ring of projective varieties. Then we find a characterization for graphs in order to define irreducible hypersurfaces in general.Comment: To appear in the proceedings of the 6th summer school of topological and algebraic methods in quantum field theory at Villa de Leyva, Colombi

Dark Matter and Vector-like Leptons From Gauged Lepton Number

We investigate a simple model where Lepton number is promoted to a local $U(1)_L$ gauge symmetry which is then spontaneously broken, leading to a viable thermal DM candidate and vector-like leptons as a byproduct. The dark matter arises as part of the exotic lepton sector required by the need to satisfy anomaly cancellation and is a Dirac electroweak (mostly) singlet neutrino. It is stabilized by an accidental global symmetry of the renormalizable Lagrangian which is preserved even after the gauged lepton number is spontaneously broken and can annihilate efficiently to give the correct thermal relic abundance. We examine the ability of this model to give a viable DM candidate and discuss both direct and indirect detection implications. We also examine some of the LHC phenomenology of the associated exotic lepton sector and in particular its effects on Higgs decays.Comment: References and a few comments adde

Deep Neural Networks for the Recognition and Classification of Heart Murmurs Using Neuromorphic Auditory Sensors

Auscultation is one of the most used techniques for detecting cardiovascular diseases, which is one of the main causes of death in the world. Heart murmurs are the most common abnormal finding when a patient visits the physician for auscultation. These heart sounds can either be innocent, which are harmless, or abnormal, which may be a sign of a more serious heart condition. However, the accuracy rate of primary care physicians and expert cardiologists when auscultating is not good enough to avoid most of both type-I (healthy patients are sent for echocardiogram) and type-II (pathological patients are sent home without medication or treatment) errors made. In this paper, the authors present a novel convolutional neural network based tool for classifying between healthy people and pathological patients using a neuromorphic auditory sensor for FPGA that is able to decompose the audio into frequency bands in real time. For this purpose, different networks have been trained with the heart murmur information contained in heart sound recordings obtained from nine different heart sound databases sourced from multiple research groups. These samples are segmented and preprocessed using the neuromorphic auditory sensor to decompose their audio information into frequency bands and, after that, sonogram images with the same size are generated. These images have been used to train and test different convolutional neural network architectures. The best results have been obtained with a modified version of the AlexNet model, achieving 97% accuracy (specificity: 95.12%, sensitivity: 93.20%, PhysioNet/CinC Challenge 2016 score: 0.9416). This tool could aid cardiologists and primary care physicians in the auscultation process, improving the decision making task and reducing type-I and type-II errors.Ministerio de Economía y Competitividad TEC2016-77785-

NAVIS: Neuromorphic Auditory VISualizer Tool

This software presents diverse utilities to perform the first post-processing layer taking the neuromorphic auditory sensors (NAS) information. The used NAS implements in FPGA a cascade filters architecture, imitating the behavior of the basilar membrane and inner hair cells and working with the sound information decomposed into its frequency components as spike streams. The well-known neuromorphic hardware interface Address-Event-Representation (AER) is used to propagate auditory information out of the NAS, emulating the auditory vestibular nerve. Using the information packetized into aedat files, which are generated through the jAER software plus an AER to USB computer interface, NAVIS implements a set of graphs that allows to represent the auditory information as cochleograms, histograms, sonograms, etc. It can also split the auditory information into different sets depending on the activity level of the spike streams. The main contribution of this software tool is that it allows complex audio post-processing treatments and representations, which is a novelty for spike-based systems in the neuromorphic community and it will help neuromorphic engineers to build sets for training spiking neural networks (SNN).Ministerio de Economía y Competitividad TEC2012-37868-C04-0

Plataforma d'orientació pel seguiment en temps real de UAVs

Aquest document conté les definicions i especificacions del que s'anomena una plataforma mòbil d'angle i inclinació. En aquest cas s'ha utilitzat una plataforma de la marca "Directed Perception", empresa dedicada a la fabricació d'aquest tipus d'objectes. A partir de l'ús d'aquesta plataforma s'ha desenvolupat un software en llenguatge C# per tal de poder controlar-la i utilitzar-la per a realitzar el seguiment d'una aeronau, ja sigui tripulada o no, de la qual sabem les seves dades GPS de posició i d'altitud. Per a aquest objectiu s'ha utilitzat un mòdul que comercialitza també el mateix fabricant de la plataforma i que permet, a més de que la plataforma pugui ser accessible dins d'una xarxa Ethernet, orientar la plataforma automàticament a partir de les posicions GPS de l'aeronau. Així, l'objectiu del treball ha estat el desenvolupar una interfície que controlés la plataforma i que estigués integrada dins el middleware MAREA (Middleware Architecture for Remote Embedded Applications) , un software de connectivitat desenvolupat per l'equip d'investigació i desenvolupament ICARUS de la Universitat Politècnica de Catalunya capaç de funcionar com una capa d'abstracció de software, entre la capa d'aplicacions i la capa de xarxa. Amb aquest software es podran dur a termes dues aplicacions principals: el seguiment en temps real d'aeronaus i la comprovació de les mesures del GPS a bord de l'aeronau

http://www.rinace.net/reice/numeros/arts/vol8num2/art3.pdf

Retomando las reflexiones de Muñoz Repiso, el autor elabora sobre las relaciones entre investigación y práctica docente y los ‘supuestos avances’ en la investigación sobre didáctica y sobre pedagogía más en general. Muñoz Repiso se pregunta por qué la disociación entre investigación y práctica profesional ocurre precisamente en la enseñanza; disociación que me lleva a tratar de lo que se puede denominar todo un movimiento que tiende a integrar investigación y práctica docente convirtiendo en investigadores a los mismos docente