DENDROID: A text mining approach to analyzing and classifying code structures in Android malware families

The rapid proliferation of smartphones over the last few years has come hand in hand with and impressive growth in the number and sophistication of malicious apps targetting smartphone users. The availability of reuse-oriented development methodologies and automated malware production tools makes exceedingly easy to produce new specimens. As a result, market operators and malware analysts are increasingly overwhelmed by the amount of newly discovered samples that must be analyzed. This situation has stimulated research in intelligent instruments to automate parts of the malware analysis process. In this paper, we introduce DENDROID, a system based on text mining and information retrieval techniques for this task. Our approach is motivated by a statistical analysis of the code structures found in a dataset of ANDROID OS malware families, which reveals some parallelisms with classical problems in those domains. We then adapt the standard Vector Space Model and reformulate the modelling process followed in text mining applications. This enables us to measure similarity between malware samples, which is then used to automatically classify them into families. We also investigate the application of hierarchical clustering over the feature vectors obtained for each malware family. The resulting dendo-grams resemble the so-called phylogenetic trees for biological species, allowing us to conjecture about evolutionary relationships among families. Our experimental results suggest that the approach is remarkably accurate and deals efficiently with large databases of malware instances.Publicad

Secure publish-subscribe protocols for heterogeneous medical wireless body area networks

Security and privacy issues in medical wireless body area networks (WBANs) constitute a major unsolved concern because of the challenges posed by the scarcity of resources in WBAN devices and the usability restrictions imposed by the healthcare domain. In this paper, we describe a WBAN architecture based on the well-known publish-subscribe paradigm. We present two protocols for publishing data and sending commands to a sensor that guarantee confidentiality and fine-grained access control. Both protocols are based on a recently proposed ciphertext policy attribute-based encryption (CP-ABE) scheme that is lightweight enough to be embedded into wearable sensors. We show how sensors can implement lattice-based access control (LBAC) policies using this scheme, which are highly appropriate for the eHealth domain. We report experimental results with a prototype implementation demonstrating the suitability of our proposed solution.This work was supported by the MINECO grant TIN2013-46469-R (SPINY: Security and Privacy in the Internet of You)

The effects of an appropriate behavior program on elementary school children social skills development in physical education

The purpose of this study was to see the effects of an appropriate behavior development program in relation to the improvement of fair play and social skills behaviors of elementary school children during the physical education class. The participants of this study were 204 students from 5th and 6th grade from seven different public schools in Castilla-La Mancha, Spain. Data was collected through a questionnaire to measure students' pre and post appropriate behaviors when winning, appropriate behaviors when loosing, appropriate behaviors during the game, fair play skills and social skills, during the physical education class. Results from this study revealed that participants improved their behaviors with the implementation of the intervention (appropriate behavior program), generating positive changes in students? attitudes and social skills during physical education class. In relation to children gender, girls had better scores than boys in relation to appropriate behaviors when losing. Further, when comparing students' age, those from 10 to 11 years old scored higher in fair play behaviors and social skills. In conclusion, the intervention program was effective to improve the behaviors of the school children, generating positive changes in their attitudes and social skills during physical education.Fil: Gil Madrona, Pedro. Universidad de Castilla-La Mancha; EspañaFil: Gutiérrez Marín, Eva Cristina. Universidad de Castilla-La Mancha; EspañaFil: Cupani, Marcos. Universidad Nacional de Córdoba. Instituto de Investigaciones Psicológicas. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Psicológicas; ArgentinaFil: Samalot Rivera, Amaury. State University of New York; Estados UnidosFil: Díaz Suárez, Arturo. Universidad de Murcia; EspañaFil: López Sánchez, Guillermo F.. Universidad de Murcia; Españ

Cognitive-behavioral therapy for psychological harm in domestically abused women: systematic review and meta-analysis

Introduction. Domestic violence violates the physical and mental health of the victim and her family environment; usually women are the most affected, for cultural and social reasons violence has been normalized within the family context. The damage, especially the psychological damage, is one of the consequences that lasts over time unless the victim receives comprehensive care focused on her main needs. Objective. The objective was to assess the current empirical evidence of Cognitive-Behavioral Therapy (CBT) for the treatment of psychological harm in women who have been domestically abused by their partners. Methodology. The review was conducted in the Scopus, PubMed, and Web of Science databases, using the guidelines of the Prisma and Consort statements to obtain the final sample of articles selected based on the proposed inclusion and exclusion criteria. Results. Most cognitive-behavioral interventions have focused on addressing the symptomatology of PTSD, depression, or anxiety, achieving favorable results for this type of population. Conclusion. In conclusion, CBT is effective for the treatment of psychological harm in women who have been domestically abused by their partners. However, the lack of specificity of the interventions constitutes an important limitation at the time of replication in clinical practice.La violencia doméstica vulnera la salud física y mental de la víctima y de su entorno familiar; habitualmente las mujeres son las más afectadas, por razones culturales y sociales la violencia ha sido normalizada dentro del contexto familiar. Los perjuicios, sobre todo el daño psicológico, es una de las consecuencias que perduran en el tiempo a menos que la víctima reciba una atención integral enfocada en sus principales necesidades. Objetivo.  El objetivo fue valorar la evidencia empírica actual de la Terapia Cognitivo-Conductual (TCC) para el tratamiento del daño psicológico en mujeres violentadas domésticamente por su pareja. Metodología. La revisión se realizó en la base de datos Scopus, PubMed y Web of Science, se utilizaron los lineamientos de la declaración Prisma y Consort para obtener la muestra final de los artículos seleccionados en base a los criterios de inclusión y exclusión propuestos. Resultados. La mayor parte de intervenciones cognitivo-conductuales se han centrado en el abordaje de la sintomatología del TEPT, depresión o ansiedad, logrando resultados favorables para este tipo de población. Conclusión. La TCC es eficaz para el tratamiento del daño psicológico en mujeres violentadas domésticamente por su pareja. Sin embargo, la ausencia de especificidad de las intervenciones constituye una limitante importante al momento de replicar en la práctica clínica.&nbsp

Tareas para casa, rendimiento académico e implicación de padres y profesores

Homework (HW) is one of the most common school activities among parents, students and teachers. However, the need to assign HW to students has been extensively debated. Although there exist arguments use of HW in academic settings, such as when Time magazine, in 1999, warned that HW could disturb students and their families routines, opinions towards HW are primarily favorable; the use of HW is supported by numerous authors and is acknowledged as an indicator of successful schools and students. Doing HW is aimed at improving students’ study skills and their attitudes towards future work, as well as teaching students that learning takes place both inside and outside of the school setting. Moreover, those who favor assigning of HW argue that doing HW improves students’ academic achievement and fosters their autonomy once they are stimulated to self-regulate their study behavior responsibly.Las Tareas para Casa (TPC), en el ámbito anglosajón “homework” y en el español denominadas “deberes escolares”, constituyen una de las actividades más rutinarias del ámbito escolar y es por ello que forman parte de la realidad cotidiana de alumnos y profesores. Pese a su actual presencia en el contexto académico, la necesidad de prescribir TPC a los estudiantes ha sido ampliamente cuestionada a lo largo de los años. Aunque han existido opiniones contrarias a las TPC, como ocurrió cuando la popular revista Time, en 1999, con las TPC como portada, advirtió de que éstas podían suponer una sobrecarga para los alumnos y sus familias (Corno, 1996), parece que ha terminado por imponerse la opinión favorable a ellas, la cual han defendido numerosos autores y en la que se reconocen estas tareas como un indicador de escuelas y alumnos exitosos (Epstein y Van Voorhis, 2001). En concreto, se entiende que la realización de TPC mejora las habilidades de estudio de los alumnos, sus actitudes hacia el trabajo y les enseña que el aprendizaje no sólo se produce dentro de las paredes del colegio (Trautwein, Lüdtke, Schnyder, y Niggli, 2006)

Tren de aterrizaje acoplable a una estructura de un dron

Tren de aterrizaje, acoplable a una superficie inferior de un dron (3), para posicionar sensores sobre una tubería para inspección, que comprende al menos dos mecanismos de pinza (1), acoplables a la superficie inferior del dron (3), cada uno con una estructura de acoplamiento (4) conectada con un cuerpo central (5); dos brazos (6) laterales, que pueden pivotar alrededor de un extremo interior unido al cuerpo central (5), y que comprenden ruedas omnidireccionales (7), acopladas a su cara interna; un primer actuador (9), que mueve los brazos (6); y un mecanismo de rueda tractora (2) orientable, acoplado a la zona central de la superficie inferior del dron (3), mediante una plataforma fija (10), alrededor de la que gira una plataforma móvil (11), mediante un segundo actuador (12); con una rueda tractora (13), unida a la plataforma móvil (11) mediante una primera suspensión (14) articulada, accionada por un tercer actuador (15).Españ

Conocimientos y habilidades mínimas, que un estudiante egresado de la carrera de Eduación Física, debiera poseer

Tesis (Profesor de Educación Física para la Enseñanza Básica, Licenciado en Educación)La siguiente investigación es llevada a cabo durante el segundo semestre del año 2017, para el seminario de grado de la carrera de Educación Física de la Universidad Andrés Bello. Se realiza un estudio respecto a los conocimientos o saber y a las habilidades o saber hacer mínimos que debe tener un egresado de la Carrera de Educación Física, esto considerando la opinión de una muestra de estudiantes de último año de dicha carrera. Para que la información sea lo más representativa posible se consultó a estudiantes de la Universidad Católica Silva Henríquez, Universidad Metropolitana de la Ciencias de la Educación (UMCE), Universidad SEK y la Universidad Andrés Bello (UNAB). Se asume que la aludida representatividad es parcial, sin embargo y tal como se explica en la viabilidad del estudio, los permisos y accesos a Instituciones de educación Superior es compleja. El instrumento utilizado fue una encuesta tipo cuestionario que permitió recabar los datos necesarios en breve tiempo. La confección de dicho instrumento estuvo a cargo de los propios tesistas y fue validado a través de tres expertos. El estudio se enmarca dentro las exigencias que se están instalando en la Formación Inicial Docente (FID), así como también, en los procesos de evaluación de los docentes y su formación continua. Todo ello en un marco regulatorio que propicia la Ley de Carrera Docente, (2016)

Temas Socio-Jurídicos. Volumen 4 No. 15 Marzo 1986

Dedicamos esta edición de la revista, a al memoria de los inmolados y desaparecidos en los hechos acaecidos en el Palacio de Justicia, el 6 y 7 de noviembre de 1985.We dedicate this edition of the magazine to the memory of those immolated and disappeared in the events that occurred in the Palace of Justice on November 6 and 7, 1985

The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the extended Baryon Oscillation Spectroscopic Survey and from the second phase of the Apache Point Observatory Galactic Evolution Experiment

The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) has been in operation since July 2014. This paper describes the second data release from this phase, and the fourteenth from SDSS overall (making this, Data Release Fourteen or DR14). This release makes public data taken by SDSS-IV in its first two years of operation (July 2014-2016). Like all previous SDSS releases, DR14 is cumulative, including the most recent reductions and calibrations of all data taken by SDSS since the first phase began operations in 2000. New in DR14 is the first public release of data from the extended Baryon Oscillation Spectroscopic Survey (eBOSS); the first data from the second phase of the Apache Point Observatory (APO) Galactic Evolution Experiment (APOGEE-2), including stellar parameter estimates from an innovative data driven machine learning algorithm known as "The Cannon"; and almost twice as many data cubes from the Mapping Nearby Galaxies at APO (MaNGA) survey as were in the previous release (N = 2812 in total). This paper describes the location and format of the publicly available data from SDSS-IV surveys. We provide references to the important technical papers describing how these data have been taken (both targeting and observation details) and processed for scientific use. The SDSS website (www.sdss.org) has been updated for this release, and provides links to data downloads, as well as tutorials and examples of data use. SDSS-IV is planning to continue to collect astronomical data until 2020, and will be followed by SDSS-V.Comment: SDSS-IV collaboration alphabetical author data release paper. DR14 happened on 31st July 2017. 19 pages, 5 figures. Accepted by ApJS on 28th Nov 2017 (this is the "post-print" and "post-proofs" version; minor corrections only from v1, and most of errors found in proofs corrected

Identification of a biomarker panel for colorectal cancer diagnosis

<p>Abstract</p> <p>Background</p> <p>Malignancies arising in the large bowel cause the second largest number of deaths from cancer in the Western World. Despite progresses made during the last decades, colorectal cancer remains one of the most frequent and deadly neoplasias in the western countries.</p> <p>Methods</p> <p>A genomic study of human colorectal cancer has been carried out on a total of 31 tumoral samples, corresponding to different stages of the disease, and 33 non-tumoral samples. The study was carried out by hybridisation of the tumour samples against a reference pool of non-tumoral samples using Agilent Human 1A 60-mer oligo microarrays. The results obtained were validated by qRT-PCR. In the subsequent bioinformatics analysis, gene networks by means of Bayesian classifiers, variable selection and bootstrap resampling were built. The consensus among all the induced models produced a hierarchy of dependences and, thus, of variables.</p> <p>Results</p> <p>After an exhaustive process of pre-processing to ensure data quality--lost values imputation, probes quality, data smoothing and intraclass variability filtering--the final dataset comprised a total of 8, 104 probes. Next, a supervised classification approach and data analysis was carried out to obtain the most relevant genes. Two of them are directly involved in cancer progression and in particular in colorectal cancer. Finally, a supervised classifier was induced to classify new unseen samples.</p> <p>Conclusions</p> <p>We have developed a tentative model for the diagnosis of colorectal cancer based on a biomarker panel. Our results indicate that the gene profile described herein can discriminate between non-cancerous and cancerous samples with 94.45% accuracy using different supervised classifiers (AUC values in the range of 0.997 and 0.955).</p