Detecting Cryptojacking Web Threats: An Approach with Autoencoders and Deep Dense Neural Networks

With the growing popularity of cryptocurrencies, which are an important part of day-to-day transactions over the Internet, the interest in being part of the so-called cryptomining service has attracted the attention of investors who wish to quickly earn profits by computing powerful transactional records towards the blockchain network. Since most users cannot afford the cost of specialized or standardized hardware for mining purposes, new techniques have been developed to make the latter easier, minimizing the computational cost required. Developers of large cryptocurrency houses have made available executable binaries and mainly browser-side scripts in order to authoritatively tap into users’ collective resources and effectively complete the calculation of puzzles to complete a proof of work. However, malicious actors have taken advantage of this capability to insert malicious scripts and illegally mine data without the user’s knowledge. This cyber-attack, also known as cryptojacking, is stealthy and difficult to analyze, whereby, solutions based on anti-malware extensions, blocklists, JavaScript disabling, among others, are not sufficient for accurate detection, creating a gap in multi-layer security mechanisms. Although in the state-of-the-art there are alternative solutions, mainly using machine learning techniques, one of the important issues to be solved is still the correct characterization of network and host samples, in the face of the increasing escalation of new tampering or obfuscation techniques. This paper develops a method that performs a fingerprinting technique to detect possible malicious sites, which are then characterized by an autoencoding algorithm that preserves the best information of the infection traces, thus, maximizing the classification power by means of a deep dense neural network

Childhood acute leukemias are frequent in Mexico City: descriptive epidemiology

<p>Abstract</p> <p>Background</p> <p>Worldwide, acute leukemia is the most common type of childhood cancer. It is particularly common in the Hispanic populations residing in the United States, Costa Rica, and Mexico City. The objective of this study was to determine the incidence of acute leukemia in children who were diagnosed and treated in public hospitals in Mexico City.</p> <p>Methods</p> <p>Included in this study were those children, under 15 years of age and residents of Mexico City, who were diagnosed in 2006 and 2007 with leukemia, as determined by using the International Classification of Childhood Cancer. The average annual incidence rates (AAIR), and the standardized average annual incidence rates (SAAIR) per million children were calculated. We calculated crude, age- and sex-specific incidence rates and adjusted for age by the direct method with the world population as standard. We determined if there were a correlation between the incidence of acute leukemias in the various boroughs of Mexico City and either the number of agricultural hectares, the average number of persons per household, or the municipal human development index for Mexico (used as a reference of socio-economic level).</p> <p>Results</p> <p>Although a total of 610 new cases of leukemia were registered during 2006-2007, only 228 fit the criteria for inclusion in this study. The overall SAAIR was 57.6 per million children (95% CI, 46.9-68.3); acute lymphoblastic leukemia (ALL) was the most frequent type of leukemia, constituting 85.1% of the cases (SAAIR: 49.5 per million), followed by acute myeloblastic leukemia at 12.3% (SAAIR: 6.9 per million), and chronic myeloid leukemia at 1.7% (SAAIR: 0.9 per million). The 1-4 years age group had the highest SAAIR for ALL (77.7 per million). For cases of ALL, 73.2% had precursor B-cell immunophenotype (SAAIR: 35.8 per million) and 12.4% had T-cell immunophenotype (SAAIR 6.3 per million). The peak ages for ALL were 2-6 years and 8-10 years. More than half the children (58.8%) were classified as high risk. There was a positive correlation between the average number of persons per household and the incidence of the pre-B immunophenotype (Pearson's r, 0.789; P = 0.02).</p> <p>Conclusions</p> <p>The frequency of ALL in Mexico City is among the highest in the world, similar to those found for Hispanics in the United States and in Costa Rica.</p

Gestión del conocimiento. Perspectiva multidisciplinaria. Volumen 17

El libro “Gestión del Conocimiento. Perspectiva Multidisciplinaria”, Volumen 17 de la Colección Unión Global, es resultado de investigaciones. Los capítulos del libro, son resultados de investigaciones desarrolladas por sus autores. El libro es una publicación internacional, seriada, continua, arbitrada, de acceso abierto a todas las áreas del conocimiento, orientada a contribuir con procesos de gestión del conocimiento científico, tecnológico y humanístico. Con esta colección, se aspira contribuir con el cultivo, la comprensión, la recopilación y la apropiación social del conocimiento en cuanto a patrimonio intangible de la humanidad, con el propósito de hacer aportes con la transformación de las relaciones socioculturales que sustentan la construcción social de los saberes y su reconocimiento como bien público

Economía familiar e índice de biodiversidad de especies en los traspatios comunitario de Santa María Nepopualco, Puebla

The main function of the backyards in the community of Santa Maria Nepopualco, Puebla; is to provide food for their own consumption, strengthening the family economy by minimizing the expenditure to purchase food; management of these spaces also provides options for conservation of plant biodiversity in agro-ecosystems. The objective of this research was to analyse the financial support in the use of various species in the backyard and identify plant diversity. For this, an instrument to a total of 123 key informants from peasant households (UDC) was applied to the community. The results indicate that 100% of respondents have an average room size of 2 936 m2 near the house for cultivation of plant species. The CHAID analysis indicates that, the benefits generated in the backyard as the dependent variable is significantly associated with the given destination as saving and is mainly directed for the maintenance of the family. In the backyards, we observed a Shannon diversity index (H') of 3.4 bits, considered high; and a total of 130 plant species to which different uses are given. Several factors have influenced the backyard production and therefore in plant diversity. It is necessary to reassess the backyard system and consider the additional benefits that can be obtained.La función principal de los traspatios en la comunidad de Santa María Nepopualco, Puebla; es abastecer de alimentos para autoconsumo, fortaleciendo a la economía familiar al reducir al mínimo la erogación para adquirir en el mercado dichos alimentos; el manejo de estos espacios también proporciona opciones para la conservación de la biodiversidad vegetal en dichos agroecosistemas. El objetivo de la presente investigación fue analizar el apoyo económico en el aprovechamiento de diversas especies que se tienen en el traspatio e identificar la diversidad vegetal. Para ello, se aplicó un instrumento a un total de 123 informantes claves de unidades domésticas campesinas (UDC) de la comunidad. Los resultados indican que 100% de los encuestados cuentan con un espacio tamaño promedio de 29.36 m2 cercano a la casa destinado al cultivo de especies vegetales. El análisis CHAID indica que los beneficios generados en el traspatio como variable dependiente, está relacionado significativamente, con el destino que se da del mismo como un ahorro y que se dirige principalmente para la manutención de la familia. En los traspatios se observó un índice de diversidad Shannon (H´) de 3.4 bits, considerado como alto; así como un total de 130 especies vegetales a las que se les dan distintos usos. Diversos factores han influido en la producción de traspatio y por tanto en la diversidad de especies vegetales en el mismo. Es necesario revalorar el sistema de traspatio y considerar los beneficios adicionales que se pueden obtenerse de éste

Analysis of the Behavior of SMA Mixtures with Different Fillers Through the Semicircular Bend (SCB) Fracture Test

In most cases, stone mastic asphalt (SMA) mixtures placed in thin layers and subjected to stress develop early cracks (potentially resulting from being improperly affixed to the underlying layer, placed over previously cracked asphalt pavement, or placed over Portland cement concrete slabs). However, the filler used in SMA production is very influential on the performance of the mix. Fillers used in this type of mixture have a low plastic index or are inert (calcium carbonate or lime), so it is important to understand the effect of each material on the possible fissuring and cracking process of the SMA mixture. The objective of this study is to present an evaluation of the behavior of SMA asphalt mixtures with different types of filler and at different temperatures using the semicircular bend (SCB) fracture energy test. This research compares results between fracture energy and different types of filler in SMA asphalt mixtures at temperatures ranging from &minus;10 to 25 &deg;C

Association between metabolic and immunological changes during the transition period of dual-purpose cows in the Veracruz tropic, Mexico

The objective of this study was to identify changes and associations in body condition score (BCS), serum glucose and β-hydroxybutyrate (BHB) concentrations, and white blood cell populations in dual-purpose cows during the transition period in the Veracruz tropic. BCS was evaluated and blood samples were taken weekly to determine white blood cell populations, serum glucose and BHB concentrations of 30 multiparous dual-cows (Bos taurus × Bos indicus) from 3 weeks before the expected date of calving to 3 weeks postpartum. During the prepartum period, BCS (3.56 vs 3.11 points), leukocytes (8.964 vs 7.032 × 103 cells µL-1), neutrophils (3.353 vs 2.201 × 103 cells µL-1), lymphocytes (4.750 vs 4.051 × 103 cells µL-1), and monocytes populations (222 vs 126 × 103 cells µL -1) were higher compared to the postpartum period. Contrarily, BHB concentration was higher in the postpartum period (1.34 vs 0.84 mmol L-1) than in the prepartum period. No differences in basophils and eosinophils populations and glucose concentration were identified. Associations between BCS, BHB, glucose, and populations of neutrophils, monocytes, and basophils were detected. The higher BCS, the higher the monocyte population (r = 0.22). The lower the glucose concentration, the higher the BHB concentration (r = −0.51). The higher the concentration of BHB, the lower the number of neutrophils (r = −0.22), monocytes (r = −0.32) and basophils (r = −0.23). In conclusion, low-producing dual-purpose cows experienced fluctuations in BCS, BHB, and immune cell populations during the transition period, suggesting similar metabolic and immune changes as in high-producing dairy cows

Análisis y aplicación de nuevas metodologías docentes basadas en clase invertida y gamificación a través de Moodle

En este trabajo se detallan las experiencias derivadas de un cambio en la metodología utilizada para la docencia de la asignatura Acústica en el Grado de Ingeniería en Sonido e Imagen en Telecomunicación para el curso académico 2018-2019. En concreto, se han introducido una serie de metodologías docentes encaminadas a motivar y mejorar en términos generales la docencia y comprensión de la asignatura. La asignatura de Acústica es una disciplina particular de la Física y que por lo tanto implica comprender y utilizar recursos tanto matemáticos como conceptuales. Para aumentar la motivación y mejorar el proceso de enseñanza-aprendizaje se ha utilizado la plataforma Moodle como base para facilitar una serie de contenidos destinados a la docencia de clase invertida. Los contenidos elaborados son: vídeos, cuestionarios aleatorios, apuntes de los temas basados en el módulo Libro de Moodle, insignias, uso de los módulos Tarea (para la entrega de memorias) y Taller (para el trabajo en equipo y la coevaluación). Finalmente, se ha elaborado una encuesta de satisfacción para evaluar la percepción del alumnado ante esta nueva metodología