2,051 research outputs found

    Applying Artificial Intelligence for Operating System Fingerprinting

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    Presented at the 4th XoveTIC Conference, A Coruña, Spain, 7–8 October 2021.[Abstract] In the field of computer security, the possibility of knowing which specific version of an operating system is running behind a machine can be useful, to assist in a penetration test or monitor the devices connected to a specific network. One of the most widespread tools that better provides this functionality is Nmap, which follows a rule-based approach for this process. In this context, applying machine learning techniques seems to be a good option for addressing this task. The present work explores the strengths of different machine learning algorithms to perform operating system fingerprinting, using for that, the Nmap reference database. Moreover, some optimizations were applied to the method which brought the best results, random forest, obtaining an accuracy higher than 96%.CITIC, as a research center accredited by the Galician University System, is funded by “Consellería de Cultura, Educación e Universidade from Xunta de Galicia”, supported—80% through ERDF, ERDF Operational Programme Galicia 2014–2020, and the remaining 20% by “Secretaría Xeral de Universidades (Grant ED431G 2019/01). This project was also supported by the “Consellería de Cultura, Educación e Ordenación Universitaria” via the Consolidation and Structuring of Competitive Research Units–Competitive Reference Groups (ED431C 2018/49) and the COST Action 17124 DigForAsp, supported by COST (European Cooperation in Science and Technology, www.cost.eu, (accessed on 25 October 2021)).Xunta de Galicia; ED431G 2019/01Xunta de Galicia; ED431C 2018/4

    Controlling distant contacts to reduce disease spreading on disordered complex networks

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    In real social networks, person-to-person interactions are known to be heterogeneous, which can affect the way a disease spreads through a population, reaches a tipping point in the fraction of infected individuals, and becomes an epidemic. This property, called disorder, is usually associated with contact times between individuals and can be modeled by a weighted network, where the weights are related to normalized contact times ω. In this paper, we study the SIR model for disease spreading when both close and distant types of interactions are present. We develop a mitigation strategy that reduces only the time duration of distant contacts, which are easier to alter in practice. Using branching theory, supported by simulations, we found that the effectiveness of the strategy increases when the density f1 of close contacts decreases. Moreover, we found a threshold f̃1=Tc∕β below which the strategy can bring the system from an epidemic to a non-epidemic phase, even when close contacts have the longest time durations.Fil: Pérez, Ignacio Augusto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Físicas de Mar del Plata. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Físicas de Mar del Plata; ArgentinaFil: Trunfio, Paul A.. Boston University; Estados UnidosFil: la Rocca, Cristian Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Físicas de Mar del Plata. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Físicas de Mar del Plata; Argentina. Boston University; Estados UnidosFil: Braunstein, Lidia Adriana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Físicas de Mar del Plata. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Físicas de Mar del Plata; Argentina. Boston University; Estados Unido

    Correlaciones referidas al recurso eólico en Río Cuarto

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    Se presenta en primer lugar la validación de fórmulas conocidas que permiten relacionar la velocidad del viento a distintas alturas, cercanas a la superficie. La validación se realiza mediante la estimación de un coeficiente de un modelo lineal por cuadrados mínimos. El objetivo es aprovechar mediciones de la velocidad del viento a 2m, obtenidas en algunas localidades del sur de la provincia de Córdoba para una primera estimación del recurso eólico aprovechable por aerogeneradores de baja potencia instalados en dicha localidades. En segundo lugar se establece, con igual objetivo, una correlación entre las velocidades obtenidas en la ubicación del aerogenerador del GEA y las de la estación sinóptica más cercana del SMN.First, the validation of known formulae that relate wind speed between 2 and 20 m above the surface is presented. This validation is accomplished by comparison with the results of least squares fitting of a linear model. The purpose is to evaluate the use of available data series of wind speed at 2m, for a rough estimation of wind resource in several sites in the South of the province of Córdoba, to be used by stand alone wind generators. Secondly, it is analyzed the correlation between wind speed data obtained in our station and the closest synoptic station of the National Meteorological Survey and it is concluded that a linear correlation cannot be found.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES

    Correlaciones referidas al recurso eólico en Río Cuarto

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    Se presenta en primer lugar la validación de fórmulas conocidas que permiten relacionar la velocidad del viento a distintas alturas, cercanas a la superficie. La validación se realiza mediante la estimación de un coeficiente de un modelo lineal por cuadrados mínimos. El objetivo es aprovechar mediciones de la velocidad del viento a 2m, obtenidas en algunas localidades del sur de la provincia de Córdoba para una primera estimación del recurso eólico aprovechable por aerogeneradores de baja potencia instalados en dicha localidades. En segundo lugar se establece, con igual objetivo, una correlación entre las velocidades obtenidas en la ubicación del aerogenerador del GEA y las de la estación sinóptica más cercana del SMN.First, the validation of known formulae that relate wind speed between 2 and 20 m above the surface is presented. This validation is accomplished by comparison with the results of least squares fitting of a linear model. The purpose is to evaluate the use of available data series of wind speed at 2m, for a rough estimation of wind resource in several sites in the South of the province of Córdoba, to be used by stand alone wind generators. Secondly, it is analyzed the correlation between wind speed data obtained in our station and the closest synoptic station of the National Meteorological Survey and it is concluded that a linear correlation cannot be found.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES

    Correlaciones referidas al recurso eólico en Río Cuarto

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    Se presenta en primer lugar la validación de fórmulas conocidas que permiten relacionar la velocidad del viento a distintas alturas, cercanas a la superficie. La validación se realiza mediante la estimación de un coeficiente de un modelo lineal por cuadrados mínimos. El objetivo es aprovechar mediciones de la velocidad del viento a 2m, obtenidas en algunas localidades del sur de la provincia de Córdoba para una primera estimación del recurso eólico aprovechable por aerogeneradores de baja potencia instalados en dicha localidades. En segundo lugar se establece, con igual objetivo, una correlación entre las velocidades obtenidas en la ubicación del aerogenerador del GEA y las de la estación sinóptica más cercana del SMN.First, the validation of known formulae that relate wind speed between 2 and 20 m above the surface is presented. This validation is accomplished by comparison with the results of least squares fitting of a linear model. The purpose is to evaluate the use of available data series of wind speed at 2m, for a rough estimation of wind resource in several sites in the South of the province of Córdoba, to be used by stand alone wind generators. Secondly, it is analyzed the correlation between wind speed data obtained in our station and the closest synoptic station of the National Meteorological Survey and it is concluded that a linear correlation cannot be found.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES

    Contribution of migrant coffee labourers infected with Onchocerca volvulus to the maintenance of the microfilarial reservoir in an ivermectin-treated area of Mexico

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    BACKGROUND: Since 1991, in Mexico, ivermectin has been administered twice a year to all residents in the onchocerciasis endemic foci which are mainly located in the coffee growing areas. However, the presence of a potentially infected itinerant seasonal labour force which is not treated regularly could jeopardise the attainment of the 85% coverage which is the present target for elimination of the disease. METHODS: The prevalence and intensity of Onchocerca volvulus microfilariae (mf), as well as their transmission from humans to vectors, were assessed during the coffee planting-clearing and harvesting seasons of 1997-1998, and 1998-1999 in two localities (I and II) of Southern Chiapas, Mexico, which regularly receive an influx of untreated migrant coffee labourers. RESULTS: Localities I and II had, respectively, an average of 391 (+/- 32) and 358 (+/- 14) resident inhabitants, and 70 (+/- 52) and 498 (+/- 289) temporary labourers. The ratio of migrants to residents ranged from 0.1:1 in locality I to 2.4:1 in locality II. The proportion of infected Simulium ochraceum s.l. parous flies was significantly lower in locality I than in locality II, and significantly higher during the stay of the migrants than before their arrival or after their departure. Parity and infection were higher in May-July than in November-February (in contrast with the latter being typically considered as the peak onchocerciasis transmission season by S. ochraceum s.l.). CONCLUSION: The presence of significant numbers of untreated and potentially infected migrants may contribute to ongoing transmission, and their incorporation into ivermectin programmes should be beneficial for the attainment of the elimination goals of the regional initiative. However, the possibility that the results also reflect transmission patterns for the area cannot be excluded and these should be analyzed further

    Metodologías para el desarrollo de software en PYMES

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    Uno de los principales objetivos de este proyecto de investigación en el cual está inmerso el presente trabajo, es especificar modelos y guías de certificación para productos de Software Libre y procesos de ciclo de vida que involucren plataformas open source. Para alcanzar los objetivos propuestos se abordaron los diferentes modelos de proceso de software, desarrollando sus características, bondades y deficiencias, con el fin de detectar qué metodología se encuadra o adapta mejor al escenario de las Pequeñas y Medianas Empresas productoras de software o empresas que en su estructura albergan un equipo de desarrollo no demasiado numeroso. Se realizará un relevamiento en PYMES en la Región de Salto Grande, que tengan grupos de trabajos dedicados al proceso de ciclo de vida de software.Eje: Ingeniería de SoftwareRed de Universidades con Carreras en Informática (RedUNCI

    Metodologías para el desarrollo de software en PYMES

    Get PDF
    Uno de los principales objetivos de este proyecto de investigación en el cual está inmerso el presente trabajo, es especificar modelos y guías de certificación para productos de Software Libre y procesos de ciclo de vida que involucren plataformas open source. Para alcanzar los objetivos propuestos se abordaron los diferentes modelos de proceso de software, desarrollando sus características, bondades y deficiencias, con el fin de detectar qué metodología se encuadra o adapta mejor al escenario de las Pequeñas y Medianas Empresas productoras de software o empresas que en su estructura albergan un equipo de desarrollo no demasiado numeroso. Se realizará un relevamiento en PYMES en la Región de Salto Grande, que tengan grupos de trabajos dedicados al proceso de ciclo de vida de software.Eje: Ingeniería de SoftwareRed de Universidades con Carreras en Informática (RedUNCI
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