On the origin of the jet-like radio/X-ray morphology of G290.1-0.8

The origin and evolution of supernova remnants of the mixed-morphology class is not well understood. Several remnants present distorted radio or X-ray shells with jet-like structures. G290.1-0.8 (MSH 11-61A) belongs to this class. We aim to investigate the nature of this supernova remnant in order to unveil the origin of its particular morphology. We based our work on the study of the X-ray emitting plasma properties and the conditions imposed by the cold interstellar medium where the remnant expanded. We use archival radio, HI line data and X-ray observations from XMM-Newton and Chandra observatories, to study G290.1-0.8 and its surrounding medium. Spatially resolved spectral analysis and mean photon energy maps are used to obtain physical and geometrical parameters of the source. Radio continuum and HI line maps give crucial information to understand the radio/X-ray morphology. The X-ray images show that the remnant presents two opposite symmetric bright spots on a symmetry axis running towards the NW-SE direction. Spectral analysis and mean photon energy maps confirm that the physical conditions of the emitting plasma are not homogeneous throughout the remnant. In fact, both bright spots have higher temperatures than the rest of the plasma and its constituents have not reached ionization equilibrium yet. HI line data reveal low density tube-like structures aligned along the same direction. This evidence supports the idea that the particular X-ray morphology observed is a direct consequence of the structure of the interstellar medium where the remnant evolved. However, the possibility that an undetected point-like object, as a neutron star, exists within the remnant and contributes to the X-ray emission cannot be discarded. Finally, we suggest that a supernova explosion due to the collapse of a high-mass star with a strong bipolar wind can explain the supernova remnant morphology.Comment: 8 pages, 6 figures. Accepted for publication in A&

Honeynet para el análisis del tráfico y muestras de malware

En este proyecto nos hemos propuesto desplegar varios honeypots en dos dispositivos del tipo Raspberry Pi a fin de analizar ataques dirigidos a la red de la UGR. Presentamos a continuación un breve resumen del experimento. Por un lado hemos obtenido resultados de un honeypot de tipo Kippo, relacionados con ataques del tipo fuerza bruta, procedentes de varias direcciones IP, la mayoría de ellas de la zona de Asia. Además mostraremos los resultados del análisis de las muestras de malware obtenidas mediante Kippo. Por otro lado tenemos analizaremos los resultados obtenidos sobre ataques de tipo web recibidos por otro honeypot de baja interacción, Glastopf. No obstante, el principal objetivo del proyecto es identificar y clasificar diferentes muestras de malware así como proporcionar al lector una receta para este fin.In this project we are about to deploy several honeypots in two Raspberry PI devices in order to analyze attacks directed to the UGR network. We present here a brief resume of the results of the experiment. On the one hand, we have results from a Kippo honeypot related to brute force attacks from several IP directions, most of them coming from Asia. In addition we show the results of a malware analysis of samples obtained from Kippo. On the other hand, we will analyse results related to web attacks with another low/medium interaction honeypot, Glastopf. In this particular project, the main purpose is to identify and classify several samples of malware as well as to show to the reader a recipe to achieve this goal.Universidad de Granada: Departamento de Arquitectura y Tecnología de Computadores; Vicerrectorado para la Garantía de la Calidad

Neutron stars in Scalar-Tensor-Vector Gravity

Scalar-Tensor-Vector Gravity (STVG), also referred as Modified Gravity (MOG), is an alternative theory of the gravitational interaction. Its weak field approximation has been successfully used to describe Solar System observations, galaxy rotation curves, dynamics of clusters of galaxies, and cosmological data, without the imposition of dark components. The theory was formulated by John Moffat in 2006. In this work, we derive matter-sourced solutions of STVG and construct neutron star models. We aim at exploring STVG predictions about stellar structure in the strong gravity regime. Specifically, we represent spacetime with a static, spherically symmetric manifold, and model the stellar matter content with a perfect fluid energy-momentum tensor. We then derive the modified Tolman–Oppenheimer–Volkoff equation in STVG and integrate it for different equations of state. We find that STVG allows heavier neutron stars than General Relativity (GR). Maximum masses depend on a normalized parameter that quantifies the deviation from GR. The theory exhibits unusual predictions for extreme values of this parameter. We conclude that STVG admits suitable spherically symmetric solutions with matter sources, relevant for stellar structure. Since recent determinations of neutron stars masses violate some GR predictions, STVG appears as a viable candidate for a new gravity theory.Instituto Argentino de RadioastronomíaFacultad de Ciencias Astronómicas y Geofísica

Miasis gástrica e intestinal por Ornidia obesa (Diptera: Syrphidae) en humanos. Primer reporte en Colombia

Myasis are parasitic infestations of animals and humans tissues and is caused by fly larvae. This kind of infestation has Public Health importance. In the Colombian biomedical literature the reports about myiasis in humans are scarce. In this paper, we report two cases of patients with gastrointestinal myiasis where the etiologic agents involved were Ornidia obesa and Ornidia sp (Diptera: Syrphidae). The taxonomic identification of the larvae was done at the Colombian Institute of Tropical Medicine and taxonomic confirmation was done at the laboratory of medicine veterinary and Zoology of Sao Pablo University. These two cases of myiasis are of first report in ColombiaLas miasis son infestaciones de tejidos de animales y humanos, causadas por larvas de moscas, las cuales tienen importancia manifiesta en Salud Publica. En la literatura biomédica Colombiana, son escasos los reportes referentes a los diferentes tipos de miasis que se presentan en los humanos. En este trabajo se reportan dos casos de pacientes con miasis gastrointestinal, donde los agentes etiológicos implicados fueron Ornidia obesa y Ornidia sp (Diptera: Syrphidae). La identificación taxonómica de las larvas halladas en ambos pacientes se realizó en el Instituto Colombiano de Medicina Tropical CES y fue confirmada en el Laboratorio del Departamento de Medicina Veterinaria Preventiva en Salud Animal de la Facultdad de Medicina Veterinaria y Zootecnia de la Universidad de Sao Paulo. Estos dos casos de miasis se constituyen en el primer reporte en Colombia

Análisis estructural y operativo de las coordinaciones deportivas del nivel superior

La presente investigación tuvo como objetivo el analizar las estructuras organizacionales de los departamentos deportivos de las Facultades del Nivel Superior de la UANL que participan en los torneos internos organizados por la Dirección General de Deportes. Partiendo de la necesidad de trasformación de las entidades deportivas en pro de garantizar las mejores condiciones en la oferta y accesibilidad hacia los servicios. En el estudio participaron un total de 16 facultades de nivel superior pertenecientes a la UANL, a las cuales se les aplicó un cuestionario denominado estructuras organizacionales universitarias, encontrándose en relación al número de empleados que cuentan con un promedio de 29 empleados por dependencia los cuales atienden aproximadamente a 606 usuarios en 30 disciplinas deportivas, encontrándose en cuanto a su estructura organizacional que por su contenido son integrales y por su forma o presentación son verticales, por otra parte el 81.25% establece 3 niveles jerárquicos, un 62% opera con cinco departamentos internos, el 56% cuenta con 3 tramos de control mientras que el 44% restante opera con 2. El estudio concluye expresando que si bien existen cadenas de mando definidas, existen áreas de oportunidad en la estructura organizacional de las empresas, que van desde la ampliación de los niveles jerárquicos, así como la definición de puestos

Feline testicular ultrasonogram differentiates pre vs. postpubertal and normal vs. disrupted spermatogenesis

The aims of this study were: to ultrasonograhically describe and compare testicular parenchyma echogenicity and heterogeneity using digital image analysis in: I) prepubertal (PREP), peripubertal (PERI) and mature (MAT) cats; II) Normal and abnormal mature felids. Secondary, the relationships between histomorphological and ultrasonographic attributes of the testes were also determined. I) Fourteen, PREP, PERI and MAT male cats were ultrasonographically examined and then castrated. II) Seven adult cats were ultrasonographically examined before and after a GnRH antagonist administration and then castrated. All the testes were grossly and histomorphometrically assessed. In the frozen digital images of the longitudinal ultrasound sections, 3 regions of interest (ROI, 1 mm2) were selected. Within each ROI the echogenicity and the heterogeneity of the testicular parenchyma were digitally analyzed. In experiment I, testicular volume (0.15 ± 0.0 vs. 0.49 ± 0.1 vs. 1.65 ± 0.1; P 0.05) decreased in the post GnRH antagonist abnormal testes. For both experiments, testicular volume, seminiferous tubular diameter, percentage of spermatids as the most mature cell type, and luminal/intertubular ratio were highly correlated (P < 0.01) with their echotextural attributes. Computer-assisted image analysis of B mode ultrasonogram appears as a good indicator of pubertal development and mild alterations of spermatogenesis in felids.Fil: D Francisco, Florencia Alina. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Departamento de Ciencias Básicas. Cátedra de Fisiología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Lapuente Romero, Camila. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Departamento de Ciencias Básicas. Laboratorio de Nutrición Mineral y Fisiología Reproductiva; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: López Merlo, Mariana Lucía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Centro de Fisiología Reproductiva y Métodos Complementarios de Diagnóstico; ArgentinaFil: Barbeito, Claudio Gustavo. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Gobello, María Cristina. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Departamento de Ciencias Básicas. Laboratorio de Nutrición Mineral y Fisiología Reproductiva; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentin

On the origin of the jet-like radio/X-ray morphology of G290.1-0.8

Context. The origin and evolution of supernova remnants of the mixed-morphology class is not well understood. Several remnants present distorted radio or X-ray shells with jet-like structures. G290.1-0.8 (MSH 11-61A) belongs to this particular class. Aims. We aim to investigate the nature of this supernova remnant in order to unveil the origin of its particular morphology. We based our work on the study of the X-ray emitting plasma properties and the conditions imposed by the cold interstellar medium where the remnant expanded. Methods. We use archival radio, H I line data and X-ray observations from XMM-Newton and Chandra observatories, to study G290.1-0.8 and its surrounding medium in detail. Spatially resolved spectral analysis and mean photon energy maps are used to obtain physical and geometrical parameters of the source. Radio continuum and H I line maps give crucial information to understand the radio/X-ray morphology. Results. The X-ray images show that the supernova remnant presents two opposite symmetric bright spots on a symmetry axis running towards the north west-south east direction. Spectral analysis and mean photon energy maps confirm that the physical conditions of the emitting plasma are not homogeneous throughout the remnant. In fact, both bright spots have higher temperatures than the rest of the plasma and its constituents have not reached ionization equilibrium yet. H I line data reveal low density tube-like structures aligned along the same direction. This evidence supports the idea that the particular X-ray morphology observed is a direct consequence of the structure of the interstellar medium where the remnant evolved. However, the possibility that an undetected point-like object, as a neutron star, exists within the remnant and contributes to the X-ray emission cannot be discarded. Finally, we suggest that a supernova explosion due to the collapse of a high-mass star with a strong bipolar wind can explain the supernova remnant morphology.Facultad de Ciencias Astronómicas y Geofísica

Becoming a Care-Tizen: Contributing to Democracy Through Forest Commoning

This paper aims to expand current understandings on the relationship between forest commoning, citizenship and democracy. For doing so, it presents a case study of a community forest in the periphery of Vigo city (Galicia, Spain). Using interviews and historical records of the city and the neighborhood, the paper tells the story of the emergence of a forest commons in relation to citizenship claims and struggles. Through time, communal practices of care for forest forge care-tizens, a self-organized form of citizenship performed through mutual care and care for the commons. This care-tizenship was enabled by commoners’ affective relations to forests and more-than-human subjectivities. The conclusion underlines the mutually reinforcing relationship between commoning forests and citizenship, suggesting the importance of community forests as arenas to nurture alternative, expanded more direct, and ecological forms of democracy