BlueLock una herramienta para prevenir ataques en Bluetooth

Digital devices are presented several vulnerabilities because when making a connection your information can be compromised. Bluetooth is a means of wireless communication that allows you to transfer files with distances of up to 100 meters, but its security has been seen as malicious users, attacking special cell phones. The Bluetooth manufacturers have improved their security but it has not been enough to control the vulnerabilities. The security of the Bluetooth connection has been directed by the manufacturers, but the user has not been able to carry out a control of this security.Los dispositivos digitales presentan vulnerabilidades ya que al realizar una conexión su información puede verse comprometida. Bluetooth es un medio de comunicación inalámbrico muy reconocido ya que permite transferencia de archivos con distancias de hasta 100 metros, pero su seguridad se ha visto afectada por usuarios maliciosos, atentando en especial dispositivos celulares. Los fabricantes de bluetooth han mejorado su seguridad, pero no ha sido suficiente para controlar las vulnerabilidades. La seguridad de conexión de bluetooth ha sido gestionada por los fabricantes, pero el usuario final no puede llevar un control de esta seguridad

REFLEXIONES SOBRE DERECHO, ACCESO Y DISPONIBILIDAD DE ALIMENTOS

La nutrición es el factor más fuertemente relacionado para determinar el estado de salud de la población, interviene en las esferas, biológica, psicológica y social; en la esfera social se relaciona con el aspecto de economía, puesto que la población bien alimentada tiene capacidad de incrementar las actividades productivas y desarrollo de las naciones. Todos los seres humanos tienen derecho a la alimentación, por lo tanto el Gobierno  tiene la obligación de otorgarla a través de un buen acceso. La seguridad alimentaria es una estrategia que puede ayudar a contribuir en el mejoramiento del estado nutricional de la población.Palabras clave: seguridad alimentaria, acceso,disponibilidadnourishing security, access, availabilit

Patógenos fúngicos en lesiones dermatológicas de grandes y pequeñas especies animales en clínicas veterinarias y refugios animales en Bogotá D.C.

The aim of this study was to determine the presence of fungal pathogens from dermatological lesions of large and small animal species in veterinary clinics and animal shelters in Bogotá, Colombia. From a total of 30 canines, 15 felines and 2 equines, skin scraping samples (31) and otic (26) and skin (44) swabs were obtained, which were analysed by direct examination, culture and identification at the species level. Microsporum canis and Malassezia spp were mainly identified. According to the animal species, M. canis (21.4%) predominated in felines and Malassezia pachydermatis (32.1%) in canines. According to the type of sample, a higher frequency of M. canis was detected in skin scraping (21.4%) and Malassezia spp in ear swabbing (21.4%).El objetivo del presente estudio fue determinar la presencia de patógenos fúngicos a partir de lesiones dermatológicas en grandes y pequeñas especies animales en clínicas veterinarias y refugios animales de Bogotá, Colombia. De un total de 30 caninos, 15 felinos y 2 equinos se obtuvieron muestras de raspado de piel (31) e hisopados óticos (26) y de piel (44), que fueron analizadas mediante examen directo, cultivo e identificación a nivel de especie. Se determinó la presencia de Microsporum canis y Malassezia spp. Según la especie animal predominaron M. canis (21.4%) en felinos y Malassezia pachydermatis (32.1%) en caninos. Según el tipo de muestra se detectó mayor frecuencia de M. canis en raspado de piel (21.4%) y Malassezia spp en hisopado ótico (21.4%)

Study on multi-ELVES in the Pierre Auger Observatory

Since 2013, the four sites of the Fluorescence Detector (FD) of the Pierre Auger Observatory record ELVES with a dedicated trigger. These UV light emissions are correlated to distant lightning strikes. The length of recorded traces has been increased from 100 μs (2013), to 300 μs (2014-16), to 900 μs (2017-present), to progressively extend the observation of the light emission towards the vertical of the causative lightning and beyond. A large fraction of the observed events shows double ELVES within the time window, and, in some cases, even more complex structures are observed. The nature of the multi-ELVES is not completely understood but may be related to the different types of lightning in which they are originated. For example, it is known that Narrow Bipolar Events can produce double ELVES, and Energetic In-cloud Pulses, occurring between the main negative and upper positive charge layer of clouds, can induce double and even quadruple ELVES in the ionosphere. This report shows the seasonal and daily dependence of the time gap, amplitude ratio, and correlation between the pulse widths of the peaks in a sample of 1000+ multi-ELVES events recorded during the period 2014-20. The events have been compared with data from other satellite and ground-based sensing devices to study the correlation of their properties with lightning observables such as altitude and polarity

A search for ultra-high-energy photons at the Pierre Auger Observatory exploiting air-shower universality

The Pierre Auger Observatory is the most sensitive detector to primary photons with energies above ∼0.2 EeV. It measures extensive air showers using a hybrid technique that combines a fluorescence detector (FD) with a ground array of particle detectors (SD). The signatures of a photon-induced air shower are a larger atmospheric depth at the shower maximum (X$_{max}$) and a steeper lateral distribution function, along with a lower number of muons with respect to the bulk of hadron-induced background. Using observables measured by the FD and SD, three photon searches in different energy bands are performed. In particular, between threshold energies of 1-10 EeV, a new analysis technique has been developed by combining the FD-based measurement of X$_{max}$ with the SD signal through a parameter related to its muon content, derived from the universality of the air showers. This technique has led to a better photon/hadron separation and, consequently, to a higher search sensitivity, resulting in a tighter upper limit than before. The outcome of this new analysis is presented here, along with previous results in the energy ranges below 1 EeV and above 10 EeV. From the data collected by the Pierre Auger Observatory in about 15 years of operation, the most stringent constraints on the fraction of photons in the cosmic flux are set over almost three decades in energy

Extraction of the Muon Signals Recorded with the Surface Detector of the Pierre Auger Observatory Using Recurrent Neural Networks

We present a method based on the use of Recurrent Neural Networks to extract the muon component from the time traces registered with water-Cherenkov detector (WCD) stations of the Surface Detector of the Pierre Auger Observatory. The design of the WCDs does not allow to separate the contribution of muons to the time traces obtained from the WCDs from those of photons, electrons and positrons for all events. Separating the muon and electromagnetic components is crucial for the determination of the nature of the primary cosmic rays and properties of the hadronic interactions at ultra-high energies. We trained a neural network to extract the muon and the electromagnetic components from the WCD traces using a large set of simulated air showers, with around 450 000 simulated events. For training and evaluating the performance of the neural network, simulated events with energies between 1018.5, eV and 1020 eV and zenith angles below 60 degrees were used. We also study the performance of this method on experimental data of the Pierre Auger Observatory and show that our predicted muon lateral distributions agree with the parameterizations obtained by the AGASA collaboration