1,520 research outputs found
Evaluation and Design Exploration of Solar Harvested-Energy Prediction Algorithm
No full textTo respond to variations in solar energy, harvested-energy prediction is essential to harvested-energy management approaches. The effectiveness of such approaches is dependent on both the achievable accuracy and computation overhead of prediction algorithm implementation. This paper presents detailed evaluation of a recently reported solar energy prediction algorithm to determine empirical bounds on achievable accuracy and implementation overhead using an effective error evaluation technique. We evaluate the algorithm performance over varying prediction horizons and propose guidelines for algorithm parameter selection across different real solar energy profiles to simplify implementation. The prediction algorithm computation overhead is measured on actual hardware to demonstrate prediction accuracy-cost trade-off. Finally, we motivate the basis for dynamic prediction algorithm and show that more than 10% increase in prediction accuracy can be achieved compared to static algorithm
Optimización de memoria dinámica en sistemas emportados multimedia mediante computación evolutiva
No full textTrabajo de la asignatura Sistemas Informáticos (Facultad de Informática, Curso 2005-2006)El propósito de nuestro proyecto ha sido la implementación de un algoritmo genético
multiobjetivo (del tipo VEGA), en el que dada una aplicación para un sistema empotrado a
optimizar, devuelva las mejores estructuras de datos dinámicas para las correspondientes
variables dinámicas de dicha aplicación. Para ello, nos hemos basado en los resultados
obtenidos en los perfiles de ejecución de aplicaciones reales y de resultados teóricos sobre las
implementaciones de dichas estructuras de datos. Los datos teóricos se han obtenido aplicando
la metodología desarrollada por el profesor David Atienza en su tesis doctoral “Metodología
multinivel de refinamiento del subsistema de memoria dinámica para los sistemas empotrados
multimedia de altas prestaciones”. Como podremos comprobar a lo largo del desarrollo de
esta memoria, los resultados obtenidos demuestran la validez de nuestra aproximación.
[ABSTRACT]
The objective of our project has been the implementation of a multi-objective genetic
algorithm (i.e., VEGA type), where given an application to be optimized for a certain embedded
system, it returns the best DDT for each of included dynamic variable in the target application.
The developed framework makes use of application profiling and performs the exploration
using as basis to prune the design space the theoretical modelling on the implementations of
the DDTs presented in the methodology developed by Prof. David Atienza in his thesis, entitled
“Multi-Level Refinement Methodology of the Dynamic Memory Subsystem for High-
Performance Multimedia Embedded Systems”.Depto. de Arquitectura de Computadores y AutomáticaFac. de InformáticaTRUEunpu
Analysis and evaluation of the judicial argumentation. A model and its application to decision no. 24414/2021 of the Corte di Cassazione, Sezioni Unite Civili, on the crucifix exhibition in the classrooms
No full textIn questo saggio Manuel Atienza intende proporre un modello generale per analizzare e valutare criticamente le argomentazioni giudiziali. Prendendo le mosse dalla cornice teorica elaborata in uno dei suoi lavori più celebri, Diritto come argomentazione, Atienza distingue il momento dell’analisi – volto a identificare, per “capire” e “comprendere”, gli argomenti utilizzati in un ragionamento giudiziale – e quello della valutazione – destinato, invece, a vagliare criticamente tali argomenti. Per rendere più fruibile lo strumento dell’analisi, l’autore ne propone l’applicazione schematica ad un caso fittizio. In merito alla valutazione, invece, egli chiarisce i concetti di oggettivismo morale, universalità, coerenza, consequenzialismo, morale sociale, morale giustificata e ragionevolezza, proponendoli come criteri basilari per valutare le argomentazioni giudiziali. Nella parte finale del saggio, Giovanni Blando propone un’analisi e valutazione critica della sentenza Sez. un. civ., 09/09/2021, n. 24414, sulla scorta del modello elaborato da Manuel Atienza. Dopo aver distinto gli argomenti utilizzati dalla Corte, l’Autore sviluppa alcune riflessioni critiche sulle scelte dei giudici in materia di esposizione del crocifisso nelle aule scolastiche.In this essay, Manuel Atienza intends to propose a general model to analyze and critically evaluate judicial reasoning. Moving from the theoretical framework elaborated in one of his most famous works, Diritto come argomentazione, Atienza distinguishes the moment of the analysis – aimed to identify, and then to “understand” and “comprehend” the arguments used in a legal reasoning – and that of evaluation – meant to critically evaluate those arguments. To make the instrument of analysis more accessible, the Author proposes to apply it to a fictional case. Instead, regarding evaluation, he clarifies the concepts of moral objectivism, universalism, coherence, consequentialism, social morality, justified morality and reasonableness, upholding them as basic criteria for evaluating judicial arguments. In the final part of the essay, Giovanni Blando proposes an analysis and a critical evaluation of the judgment Sez. Un. civ., 09/09/2021, n. 24414, based on the model developed by Manuel Atienza. After having distinguished the arguments used by the Court, the Author develops some critical remarks on the choice of judges regarding the crucifix exhibition in classrooms
Bioethics as Argumentation: the Bioethical Conception of Manuel Atienza
No full textEn este artículo se abordan los rasgos principales de la bioética de Manuel Atienza. Para ello, se resume, en primer lugar, su artículo «Juridificar la bioética». En segundo lugar, se ilustra la concepción de Atienza de la bioética como argumentación con tres tipos de argumentos frecuentemente usados por el autor: el argumento de la (i) razonabilidad y la apelación al consenso razonable, el argumento de la (in)coherencia y el argumento por las consecuencias normativas o fácticas. En tercer lugar, se da cuenta del fundamento último de la argumentación bioética de Atienza, su objetivismo moral mínimo, prestando especial atención a la idea de dignidad.This paper addresses the main features of Manuel Atienza’s bioethics. First, his paper «Juridificar la bioética» is summarized. Second, Atienza’s conception of bioethics as argumentation is illustrated with three types of arguments frequently used by the author: the argument of (un)reasonableness and the appeal to reasonable consensus, the argument of (in)coherence and the argument by normative or factual consequences. Third, an account of moral objectivism as the ultimate foundation of Atienza’s bioethical argumentation is provided, by paying special attention to the idea of dignity.Este trabajo ha sido realizado en el marco del proyecto de investigación «Argumentación, constitucionalismo jurídico y derechos», financiado por el Ministerio de Ciencia e Innovación, Gobierno de España, Cód. 2022/00705/001
La bioética como argumentación: la concepción bioética de Manuel Atienza
No full textThis paper addresses the main features of Manuel Atienza’s bioethics. First, his paper «Juridificar la bioética» is summarized. Second, Atienza’s conception of bioethics as argumentation is illustrated with three types of arguments frequently used by the author: the argument of (un)reasonableness and the appeal to reasonable consensus, the argument of (in)coherence and the argument by normative or factual consequences. Third, an account of moral objectivism as the ultimate foundation of Atienza’s bioethical argumentation is provided, by paying special attention to the idea of dignity.En este artículo se abordan los rasgos principales de la bioética de Manuel Atienza. Para ello, se resume, en primer lugar, su artículo «Juridificar la bioética». En segundo lugar, se ilustra la concepción de Atienza de la bioética como argumentación con tres tipos de argumentos frecuentemente usados por el autor: el argumento de la (i) razonabilidad y la apelación al consenso razonable, el argumento de la (in)coherencia y el argumento por las consecuencias normativas o fácticas. En tercer lugar, se da cuenta del fundamento último de la argumentación bioética de Atienza, su objetivismo moral mínimo, prestando especial atención a la idea de dignidad
Accelerator-Driven Data Arrangement to Minimize Transformers Run-Time on Multi-Core Architectures
No full textThe increasing complexity of transformer models in artificial intelligence expands their computational costs, memory usage, and energy consumption. Hardware acceleration tackles the ensuing challenges by designing processors and accelerators tailored for transformer models, supporting their computation hotspots with high efficiency. However, memory bandwidth can hinder improvements in hardware accelerators. Against this backdrop, in this paper we propose a novel memory arrangement strategy, governed by the hardware accelerator’s kernel size, which effectively minimizes off-chip data access. This arrangement is particularly beneficial for end-to-end transformer model inference, where most of the computation is based on general matrix multiplication (GEMM) operations. Additionally, we address the overhead of non-GEMM operations in transformer models within the scope of this memory data arrangement. Our study explores the implementation and effectiveness of the proposed accelerator-driven data arrangement approach in both single- and multi-core systems. Our evaluation demonstrates that our approach can achieve up to a 2.7x speed increase when executing inferences employing state-of-the-art transformers
Sobre la proyección de la ética a la actividad profesional de los juristas. En torno a las tesis de Manuel Atienza
No full textEn este trabajo se integran dos partes diferenciadas. La primera, constituye un comentario crítico del Autor sobre las tesis avanzadas por el profesor Manuel Atienza en su ensayo: Ética de las profesiones jurídicas, incluido en su libro sobre: Filosofía del Derecho y transformación social. El Autor muestra su conformidad con la propuesta de Atienza de considerar la Ética jurídica profesional, como una ética aplicada. Se exponen también los planteamientos de Atienza en relación con la peculiaridad de la ética jurídica cuando se proyectan a la actividad profesional de los jueces, fiscales y abogados. En la segunda parte el Autor prolonga el estímulo intelectual de la concepción de Atienza, proponiendo cinco modelos básicos, en los que se explicitan otros tantos modos de concebir la Deontología jurídica profesional del abogado y, asimismo, esboza un decálogo de los deberes éticos para el ejercicio de la abogacía.In this work, two differentiated parts are integrated. The first is a critical comment by the Author on the theses advanced by Professor Manuel Atienza in his essay: Ethics of the legal professions, included in his work Philosophy of Law and social transformation. The Author shows his agreement with the proposal of Atienza to consider professional legal Ethics as applied ethics. The argumenta of Atienza are also exposed in relation to the peculiarity of the legal ethics when they are projected to the professional activity of the judges, prosecutors and lawyers. In the second part the Author prolongs the intellectual stimulus of Atienza's conception, proposing five basic models, in which there are many other ways of conceiving the professional legal deontology of the lawyer and, also, he outlines a decalogue of the ethical du-ties for the lawyer in the exercise of the legal profession
Adaptive Task Migration Policies for Thermal Control in MPSoCs
No full textIn deep submicron circuits, high temperatures have created critical issues in reliability, timing, performance, coolings costs and leakage power. Task migration techniques have been proposed to manage efficiently the thermal distribution in multi-processor systems but at the cost of important performance penalties. While traditional techniques have focused on reducing the average temperature of the chip, they have not considered the effect that temperature gradients have in system reliability. In this work, we explore the benefits of thermal-aware task migration techniques for embedded multi-processor systems. We show the implementation issues of task migration policies on next generation architectural template of distributed memory multicore systems and we discuss the programmer's implications. Built on top of this programming model, we propose several policies that are able to reduce the average temperature of the chip and the thermal gradients with a negligible performance overhead. With our techniques, hot spots and temperature gradients are decreased up to 30% with respect to state-of-the-art thermal management approache
Modelling and Simulation Challenges and Solutions in Cooling Systems for Nanoscale Integrated Circuits
No full textThe power density in modern Integrated Circuits (ICs) is tremendous. For example, Multi-Processor Systems-on-Chip (MPSoCs) nowadays undergo temperature swings of 40 degrees in 100 milliseconds or less, with rapidly emerging and vanishing sub-millimeter hot spots. As such, not only a simulation-based cooling assessment is vital, but one has to simulate the on-chip thermal phenomena jointly with the heat dissipation system — historically, a challenge. In recent years, however, the idea of coupling traditional 3D chip simulators with heat dissipation models written in Equation-Based Modelling (EBM) languages has proven to be a game changer. EBM languages allow one to compose a model by assembling components described in terms of Differential and Algebraic Equations (DAE) and have the simulation code generated automatically. In this paper, we take a tutorial viewpoint on the matter just sketched, to put the reader in the position of exploiting the above technology. We also present the first nucleus of a model library for cooling systems, that we release as free software for the scientific and engineering community
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