Now showing items 4498-4517 of 72678

  • An alternative analysis of variance 

    Longford, Nicholas T. (Institut d'Estadística de Catalunya, 2008)
    Article
    Open Access
    The one-way analysis of variance is a staple of elementary statistics courses. The hypothesis test of homogeneity of the means encourages the use of the selected-model based estimators which are usually assessed without ...
  • An alternative approach to assess the habitat selection of folsomia candida in contaminated soils 

    Bori Dols, Jaume; Riva Juan, Mª del Carmen (2015-11-01)
    Article
    Restricted access - publisher's policy
    Avoidance tests with collembolans provide a quick assessment of soil quality. However, some parameters of the procedure can be modified in order to increase its performance. In this study we assessed the tendency of Folsomia ...
  • An alternative approach to model the internal activity of integrated circuits. 

    Berbel Artal, Néstor; Fernández García, Raúl; Gil Galí, Ignacio; Li, Binhong; BenDhia, S.; Boyer, A. (2012)
    Conference report
    Open Access
    This paper deals with the EMC modeling of integrated circuits and the standardized model IEC 62433-2 (Integrated Circuit Emission Model – Conducted Emission [1]). This standardized model has been applied into a basic digital ...
  • An alternative characterization method of PFET sub-threshold slope under NBTI stress 

    Fernández García, Raúl; Gil Galí, Ignacio (2010)
    Conference lecture
    Open Access
    The effects of negative bias temperature instability (NBTI) on the sub-threshold performance of a pFET have been investigated by means of experimental methods. Specifically, the sub-threshold slope under static and dynamic ...
  • An alternative collection of structural invariants for matrix pencils under strict equivalence 

    Díaz, Adolfo; García Planas, María Isabel (WSEAS Press. World Scientific and Engineering Academy and Society, 2009)
    Article
    Restricted access - publisher's policy
    We consider pairs of matrices (E;A), representing singular linear time invariant sys- tems in the form Ex_ (t) = Ax with E;A 2 Mp£n(C) under restricted equivalence. In this paper we obtain an alternative collection of ...
  • An alternative complete system of invariants for matrix pencils under strict equivalence 

    García Planas, María Isabel; Díaz, Adolfo (WSEAS Press. World Scientific and Engineering Academy and Society, 2009-12)
    Conference lecture
    Open Access
  • An alternative complete system of invariants for matrix pencils under strict equivalence 

    García Planas, María Isabel; Díaz, Adolfo (WSEAS Press. World Scientific and Engineering Academy and Society, 2009-12)
    Part of book or chapter of book
    Restricted access - publisher's policy
    We consider triples of matrices (E; A;B), representing singular linear time invariant systems in the form Ex_ (t) = Ax(t) + Bu(t), with E;A 2 Mp£n(C) and B 2 Mn£m(C), un- der proportional and derivative feedback. Using ...
  • An alternative discrete-time model for networked control systems with time delay less than the sampling period 

    Torres Guerrero, Gina; Velasco García, Manel; Martí Colom, Pau; Martín Rull, Enric Xavier; Fuertes Armengol, José Mª (2013)
    Conference lecture
    Restricted access - publisher's policy
    The majority of existing Networked Control Systems (NCS) models are discrete-time formulations based on the exact discretization of the continuous-time linear plant over a sample interval. In the state-space formalism, ...
  • An alternative method to quantify the electromagnetic immunity based on the Weibull distribution 

    Fernández García, Raúl; Gil Galí, Ignacio (2013)
    Article
    Open Access
    It is accepted that the electromagnetic interference should be addressed with statistical analysis. Usually the impact of electromagnetic interference on different electronic samples is evaluated and the average immunity ...
  • An Analysis of engineering students's perceptions after developing a collaborative technical writing project 

    Aguilar Pérez, Marta; Barahona Fuentes, Claudia (Peter Lang AG, 2010)
    Part of book or chapter of book
    Restricted access - publisher's policy
  • An analysis of factors used in search engine ranking 

    Bifet Figuerol, Albert Carles; Castillo, Carlos; Chirita, Paul-Alexandru; Weber, Ingmar (2005)
    Conference report
    Open Access
    This paper investigates the influence of different page features on the ranking of search engine results. We use Google (via its API) as our testbed and analyze the result rankings for several queries of different categories ...
  • An Analysis of incentives mechanisms and evaluation on BitTorrent 

    Serra Pàmies, David (Universitat Politècnica de Catalunya, 2013-11-05)
    Master thesis
    Open Access
    Since the first peer-to-peer communities appeared, their number of users has increased considerably owing to the benefits they offer compared to their alternative architectures in the sharing and distribution of multimedia ...
  • An analysis of JOTSE evolution 

    Amante García, Beatriz; Martínez Martínez, María del Rosario (OmniaScience, 2015-03)
    Article
    Open Access
  • An Analysis of Memory Based Collaborative Filtering Recommender Systems with Improvement Proposals 

    Levinas, Claudio Adrian (Universitat Politècnica de Catalunya, 2014-09-15)
    Master thesis
    Open Access
    Memory Based Collaborative Filtering Recommender Systems have been around for the best part of the last twenty years. It is a mature technology, implemented in nu- merous commercial applications. However, a departure ...
  • An analysis of MYCIN-like expert systems 

    Hajek, Petr; Valdés Ramos, Julio José (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1994)
    Article
    Open Access
    The paper is a review of our theoretical analysis of uncertainty processing in a broad class of truth-functional expert systems similar to MYCIN and PROSPECTOR, main attention being paid to parallel combination of rules. ...
  • An analysis of pollution risk on the Spanish Mediterranean coast 

    Esparza, Amable V.; Martínez de Osés, Francesc Xavier (2010-07-30)
    Article
    Restricted access - publisher's policy
    Pollution from shipping traffic poses a real risk to the Spanish coast. Memories of the Fedra bulk carrier disaster in the Strait of Gibraltar, the Prestige sinking in Finisterre or the Castor near accident off Almeria ...
  • An analysis of Regenerator Placement strategies for a Translucent OBS network architecture 

    Pedrola Escribà, Òscar; Careglio, Davide; Klinkowski, Miroslaw; Solé Pareta, Josep (2010-09-28)
    External research report
    Open Access
    Most research works in optical burst switching (OBS) networks do not take into account the impact of physical layer impairments (PLIs) either by considering fully transparent (i.e., using optical 3R regeneration) or opaque ...
  • An analysis of selection sort using recurrence relations 

    Ferri, Francesc J.; Albert, Jesús V. (Institut d'estadística de Catalunya, 1996)
    Article
    Open Access
    This paper presents a method for obtaining the expected number of data movements executed by the well-known Selection sort algorithm along with its corresponding variance. The approach presented here requires hardly any ...
  • An Analysis of Space-Time codes/channel codes combination 

    Carrasco Reyes, Rocío (Universitat Politècnica de Catalunya, 2014-09-12)
    Master thesis (pre-Bologna period)
    Open Access
    [ANGLÈS] In wireless communications are used several techniques to improve the reliability of transmitted data. Space-time coding technique (as Alamouti scheme) is one of them. This technique does not necessarily lead to ...
  • An analysis of the aerodynamic performances of an ancient Spanish windmill 

    Sanchez Gil, Eva (Universitat Politècnica de Catalunya, 2014-07-11)
    Bachelor thesis
    Restricted access - author's decision
    The windmill generates power by extracting part of the kinetic energy of the wind, and it was aimed to satisfy the basic needs on XVIII and XIX century in Southern Spain. Wind power has been used as long as humans have put ...