8 resultados para computer forensics, digital evidence, computer profiling, time-lining, temporal inconsistency, computer forensic object model

em Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco


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[es] El aprendizaje -servicio (A-S) es una propuesta educativa que combina aprendizaje y servicio en un mismo proyecto bien articulado para responder a necesidades socioeducativas reales de un contexto. El proyecto de intervención que a continuación se presenta, se dirige a la utilización del banco del tiempo de la Fundación Aldauri con el objetivo de cubrir necesidades relativas a la formación en TIC, derivadas del impacto de la brecha digital. En él se pretende que personas mayores avancen en la utilización de estas tecnologías a través de la prestación de un servicio dirigido a las personas inmigrantes participantes en el banco del tiempo.

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A disadvantage of multiple-choice tests is that students have incentives to guess. To discourage guessing, it is common to use scoring rules that either penalize wrong answers or reward omissions. These scoring rules are considered equivalent in psychometrics, although experimental evidence has not always been consistent with this claim. We model students' decisions and show, first, that equivalence holds only under risk neutrality and, second, that the two rules can be modified so that they become equivalent even under risk aversion. This paper presents the results of a field experiment in which we analyze the decisions of subjects taking multiple-choice exams. The evidence suggests that differences between scoring rules are due to risk aversion as theory predicts. We also find that the number of omitted items depends on the scoring rule, knowledge, gender and other covariates.

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This paper proposes a GARCH-type model allowing for time-varying volatility, skewness and kurtosis. The model is estimated assuming a Gram-Charlier series expansion of the normal density function for the error term, which is easier to estimate than the non-central t distribution proposed by Harvey and Siddique (1999). Moreover, this approach accounts for time-varying skewness and kurtosis while the approach by Harvey and Siddique (1999) only accounts for nonnormal skewness. We apply this method to daily returns of a variety of stock indices and exchange rates. Our results indicate a significant presence of conditional skewness and kurtosis. It is also found that specifications allowing for time-varying skewness and kurtosis outperform specifications with constant third and fourth moments.

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[ES] La documentación contenida en este registro ha servido de base para el siguiente proyecto fin de carrera:

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380 p. : il., gráf.

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This paper deals with the resource allocation problem aimed at maximizing users' perception of quality in wireless channels with time-varying capacity. First of all, we model the subjective quality-aware scheduling problem in the framework of Markovian decision processes. Then, given that the obtaining of the optimal solution of this model is unachievable, we propose a simple scheduling index rule with closed-form expression by using a methodology based on Whittle approach. Finally, we analyze the performance of the achieved scheduling proposal in several relevant scenarios, concluding that it outperforms the most popular existing resource allocation strategies.

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[ES]este proyecto trata sobre el desarrollo de un core en una FPGA para conseguir, gracias a un módulo GPS, una referencia temporal precisa, necesaria para un equipo PTP master (IEEE-1588), a bajo coste y con calidad Grand Master.