31 research outputs found

    LIPIcs, Volume 261, ICALP 2023, Complete Volume

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    LIPIcs, Volume 261, ICALP 2023, Complete Volum

    LIPIcs, Volume 274, ESA 2023, Complete Volume

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    LIPIcs, Volume 274, ESA 2023, Complete Volum

    Women in Artificial intelligence (AI)

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    This Special Issue, entitled "Women in Artificial Intelligence" includes 17 papers from leading women scientists. The papers cover a broad scope of research areas within Artificial Intelligence, including machine learning, perception, reasoning or planning, among others. The papers have applications to relevant fields, such as human health, finance, or education. It is worth noting that the Issue includes three papers that deal with different aspects of gender bias in Artificial Intelligence. All the papers have a woman as the first author. We can proudly say that these women are from countries worldwide, such as France, Czech Republic, United Kingdom, Australia, Bangladesh, Yemen, Romania, India, Cuba, Bangladesh and Spain. In conclusion, apart from its intrinsic scientific value as a Special Issue, combining interesting research works, this Special Issue intends to increase the invisibility of women in AI, showing where they are, what they do, and how they contribute to developments in Artificial Intelligence from their different places, positions, research branches and application fields. We planned to issue this book on the on Ada Lovelace Day (11/10/2022), a date internationally dedicated to the first computer programmer, a woman who had to fight the gender difficulties of her times, in the XIX century. We also thank the publisher for making this possible, thus allowing for this book to become a part of the international activities dedicated to celebrating the value of women in ICT all over the world. With this book, we want to pay homage to all the women that contributed over the years to the field of AI

    Scientific Advances in STEM: From Professor to Students

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    This book collects the publications of the special Topic Scientific advances in STEM: from Professor to students. The aim is to contribute to the advancement of the Science and Engineering fields and their impact on the industrial sector, which requires a multidisciplinary approach. University generates and transmits knowledge to serve society. Social demands continuously evolve, mainly because of cultural, scientific, and technological development. Researchers must contextualize the subjects they investigate to their application to the local industry and community organizations, frequently using a multidisciplinary point of view, to enhance the progress in a wide variety of fields (aeronautics, automotive, biomedical, electrical and renewable energy, communications, environmental, electronic components, etc.). Most investigations in the fields of science and engineering require the work of multidisciplinary teams, representing a stockpile of research projects in different stages (final year projects, master’s or doctoral studies). In this context, this Topic offers a framework for integrating interdisciplinary research, drawing together experimental and theoretical contributions in a wide variety of fields

    Online learning on the programmable dataplane

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    This thesis makes the case for managing computer networks with datadriven methods automated statistical inference and control based on measurement data and runtime observations—and argues for their tight integration with programmable dataplane hardware to make management decisions faster and from more precise data. Optimisation, defence, and measurement of networked infrastructure are each challenging tasks in their own right, which are currently dominated by the use of hand-crafted heuristic methods. These become harder to reason about and deploy as networks scale in rates and number of forwarding elements, but their design requires expert knowledge and care around unexpected protocol interactions. This makes tailored, per-deployment or -workload solutions infeasible to develop. Recent advances in machine learning offer capable function approximation and closed-loop control which suit many of these tasks. New, programmable dataplane hardware enables more agility in the network— runtime reprogrammability, precise traffic measurement, and low latency on-path processing. The synthesis of these two developments allows complex decisions to be made on previously unusable state, and made quicker by offloading inference to the network. To justify this argument, I advance the state of the art in data-driven defence of networks, novel dataplane-friendly online reinforcement learning algorithms, and in-network data reduction to allow classification of switchscale data. Each requires co-design aware of the network, and of the failure modes of systems and carried traffic. To make online learning possible in the dataplane, I use fixed-point arithmetic and modify classical (non-neural) approaches to take advantage of the SmartNIC compute model and make use of rich device local state. I show that data-driven solutions still require great care to correctly design, but with the right domain expertise they can improve on pathological cases in DDoS defence, such as protecting legitimate UDP traffic. In-network aggregation to histograms is shown to enable accurate classification from fine temporal effects, and allows hosts to scale such classification to far larger flow counts and traffic volume. Moving reinforcement learning to the dataplane is shown to offer substantial benefits to stateaction latency and online learning throughput versus host machines; allowing policies to react faster to fine-grained network events. The dataplane environment is key in making reactive online learning feasible—to port further algorithms and learnt functions, I collate and analyse the strengths of current and future hardware designs, as well as individual algorithms

    Plataforma colaborativa, distribuida, escalable y de bajo costo basada en microservicios, contenedores, dispositivos móviles y servicios en la Nube para tareas de cómputo intensivo

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    A la hora de resolver tareas de cómputo intensivo de manera distribuida y paralela, habitualmente se utilizan recursos de hardware x86 (CPU/GPU) e infraestructura especializada (Grid, Cluster, Nube) para lograr un alto rendimiento. En sus inicios los procesadores, coprocesadores y chips x86 fueron desarrollados para resolver problemas complejos sin tener en cuenta su consumo energético. Dado su impacto directo en los costos y el medio ambiente, optimizar el uso, refrigeración y gasto energético, así como analizar arquitecturas alternativas, se convirtió en una preocupación principal de las organizaciones. Como resultado, las empresas e instituciones han propuesto diferentes arquitecturas para implementar las características de escalabilidad, flexibilidad y concurrencia. Con el objetivo de plantear una arquitectura alternativa a los esquemas tradicionales, en esta tesis se propone ejecutar las tareas de procesamiento reutilizando las capacidades ociosas de los dispositivos móviles. Estos equipos integran procesadores ARM los cuales, en contraposición a las arquitecturas tradicionales x86, fueron desarrollados con la eficiencia energética como pilar fundacional, ya que son mayormente alimentados por baterías. Estos dispositivos, en los últimos años, han incrementado su capacidad, eficiencia, estabilidad, potencia, así como también masividad y mercado; mientras conservan un precio, tamaño y consumo energético reducido. A su vez, cuentan con lapsos de ociosidad durante los períodos de carga, lo que representa un gran potencial que puede ser reutilizado. Para gestionar y explotar adecuadamente estos recursos, y convertirlos en un centro de datos de procesamiento intensivo; se diseñó, desarrolló y evaluó una plataforma distribuida, colaborativa, elástica y de bajo costo basada en una arquitectura compuesta por microservicios y contenedores orquestados con Kubernetes en ambientes de Nube y local, integrada con herramientas, metodologías y prácticas DevOps. El paradigma de microservicios permitió que las funciones desarrolladas sean fragmentadas en pequeños servicios, con responsabilidades acotadas. Las prácticas DevOps permitieron construir procesos automatizados para la ejecución de pruebas, trazabilidad, monitoreo e integración de modificaciones y desarrollo de nuevas versiones de los servicios. Finalmente, empaquetar las funciones con todas sus dependencias y librerías en contenedores ayudó a mantener servicios pequeños, inmutables, portables, seguros y estandarizados que permiten su ejecución independiente de la arquitectura subyacente. Incluir Kubernetes como Orquestador de contenedores, permitió que los servicios se puedan administrar, desplegar y escalar de manera integral y transparente, tanto a nivel local como en la Nube, garantizando un uso eficiente de la infraestructura, gastos y energía. Para validar el rendimiento, escalabilidad, consumo energético y flexibilidad del sistema, se ejecutaron diversos escenarios concurrentes de transcoding de video. De esta manera se pudo probar, por un lado, el comportamiento y rendimiento de diversos dispositivos móviles y x86 bajo diferentes condiciones de estrés. Por otro lado, se pudo mostrar cómo a través de una carga variable de tareas, la arquitectura se ajusta, flexibiliza y escala para dar respuesta a las necesidades de procesamiento. Los resultados experimentales, sobre la base de los diversos escenarios de rendimiento, carga y saturación planteados, muestran que se obtienen mejoras útiles sobre la línea de base de este estudio y que la arquitectura desarrollada es lo suficientemente robusta para considerarse una alternativa escalable, económica y elástica, respecto a los modelos tradicionales.Facultad de Informátic

    Privacy in trajectory micro-data publishing: a survey

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    International audienceWe survey the literature on the privacy of trajectory micro-data, i.e., spatiotemporal information about the mobility of individuals, whose collection is becoming increasingly simple and frequent thanks to emerging information and communication technologies. The focus of our review is on privacy-preserving data publishing (PPDP), i.e., the publication of databases of trajectory micro-data that preserve the privacy of the monitored individuals. We classify and present the literature of attacks against trajectory micro-data, as well as solutions proposed to date for protecting databases from such attacks. This paper serves as an introductory reading on a critical subject in an era of growing awareness about privacy risks connected to digital services, and provides insights into open problems and future directions for research

    Privacy in trajectory micro-data publishing : a survey

    Get PDF
    We survey the literature on the privacy of trajectory micro-data, i.e., spatiotemporal information about the mobility of individuals, whose collection is becoming increasingly simple and frequent thanks to emerging information and communication technologies. The focus of our review is on privacy-preserving data publishing (PPDP), i.e., the publication of databases of trajectory micro-data that preserve the privacy of the monitored individuals. We classify and present the literature of attacks against trajectory micro-data, as well as solutions proposed to date for protecting databases from such attacks. This paper serves as an introductory reading on a critical subject in an era of growing awareness about privacy risks connected to digital services, and provides insights into open problems and future directions for research.Comment: Accepted for publication at Transactions for Data Privac
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