Now showing items 38328-38347 of 77862

  • Highly transparent steganography model of speech signals using efficient wavelet masking 

    Ballesteros, D.M.L.; Moreno Aróstegui, Juan Manuel (2012-08)
    Article
    Restricted access - publisher's policy
    Steganography is the process of hiding information on a host signal. Transparency is referred to the ability to avoid suspicion about the existence of a secret message. The most popular mechanisms for hiding data in audio ...
  • Hight prevalence of depression among working people with occupational disease: a population-based study 

    Otero Sierra, Carmen; Rodríguez Mondelo, Pedro Manuel; Macho Fernández, Juan Miguel; Chau, Nearkasen (ETSEIB, 2012)
    Conference lecture
    Restricted access - publisher's policy
    Objective Occupational diseases (OD) are common and may generate physical/mental disorders. This study assessed depression risk among workers with OD. Methods We compared 560 subjects with recognized OD (for a two-year ...
  • Highway construction in Wireless Sensor Networks 

    Segura Puimedon, Antoni (Universitat Politècnica de Catalunya, 2011-07-01)
    Master thesis (pre-Bologna period)
    Open Access
    English: Wireless sensor networks are a rapidly growing field of study with many open research topics. The aim of this project is to build a hierarchy of clusters in wireless sensor networks and to communicate them through ...
  • Highway Travel Time Data Fusion 

    Soriguera Martí, Francesc; Abeijón Monjas, David; Thorson Bofarull, Leif; Robusté Antón, Francesc (Transportation Research Board, 2008)
    Conference lecture
    Open Access
    The development of new traffic monitoring systems and the increasing interest of road operators and researchers in obtaining reliable travel time measurements has leaded to the development of multiple travel time data ...
  • Highway travel time estimation with data fusion 

    Soriguera Martí, Francesc (Springer, 2016)
    Book
    Restricted access - publisher's policy
    Travel time information is the key indicator of highway management performance and one of the most appreciated inputs for highway users. Despite this relevance, the interest of highway operators in providing approximate ...
  • Highway travel time estimation with data fusion 

    Soriguera Martí, Francesc (Universitat Politècnica de Catalunya, 2010-12-15)
    Doctoral thesis
    Open Access
  • Higuchi's fractal complexity of RR and QT interval series during transient myocardial ischemia 

    Magrans Nicieza, Rudys; Gomis Román, Pedro; Caminal Magrans, Pere; Voss, Andreas (2013)
    Conference report
    Restricted access - publisher's policy
    Myocardial ischemia may lead to significant changes in autonomic control of heart rate (HR) affecting its variability and alter beat-to-beat ventricular repolarization periods. We hypothesized that transient myocardial ...
  • Hilados de lana con fibras texturadas de poliéster. 

    López-Amo Marín, Federico; Naik Kardile, Arun (Instituto de Investigación Textil y Cooperación Industrial, 1986-01)
    Article
    Open Access
    A partir de un proceso de hilatura de simil-peinado, se trata de obtener algunos hilados de mezcla de lana con fibras de poliéster texturado, en distintas proporciones. Considerando las propiedades de estas fibras texturadas, ...
  • Hilados de Poliéster. Diferencias entre fondo y vértice en husada de anillos. 

    Gacén Guillén, Joaquín; Maillo Garrido, Josefina; Naik Kardile, Arun; Olmos, Ginés; Bernal Sánchez, Fernando (Instituto de Investigación Textil y Cooperación Industrial, 1987-01)
    Article
    Open Access
    Se ha estudiado un defecto de fabricación atípico que se ha observado en un determinado tipo de fibra de poliéster PET al transformarla en hilado en una continua de anillos. El defecto consiste en que el hilado del fondo ...
  • Hilados obtenidos a partir de fibras texturadas. 

    Naik Kardile, Arun; López-Amo Marín, Federico (Instituto de Investigación Textil y Cooperación Industrial, 1983-01)
    Article
    Open Access
    Las fibras sintéticas se rizan por procedimientos mecánicos para facilitar su procesamiento durante las distintas etapas de hilatura. El rizado introducido no es duradero y se va perdiendo gradualmente en las sucesivas ...
  • Hilados obtenidos a partir de fibras texturadas. Parte II. Propiedades de los Hilados obtenidos. 

    Naik Kardile, Arun; López-Amo Marín, Federico (Instituto de Investigación Textil y Cooperación Industrial, 1983-07)
    Article
    Open Access
    Las fibras sintéticas se rizan por procedimientos mecánicos para facilitar su procesamiento durante las distintas etapas de hilatura. El rizado introducido no es duradero y se va perdiendo gradualmente en las sucesivas ...
  • Hilatura O-E a rotor de alta velocidad. Tribocargas soportadas por el hilo durante su paso por la boquilla. 

    Coll Tortosa, Liberto; Galván Díaz, Fernando (Instituto de Investigación Textil y Cooperación Industrial, 1988-07)
    Article
    Open Access
    A lo largo de este trabajo se hace un estudio analítico experimental de las tribocargas soportadas por el hilo durante su paso por la boquilla, todo ello aplicado a la hilatura-OE por rotor de alta velocidad. De los ...
  • Hilatura-OE de rotor para lana cardada. 

    Coll Tortosa, Liberto; Grabulosa, Miguel; Masip, José (Instituto de Investigación Textil y Cooperación Industrial, 1985-01)
    Article
    Open Access
    Debido a las características peculiares de la fibra de lana, la hilatura-OE de rotor no se ha podido introducir en el sistema lanero como en el algodonero. Los problemas afectan mayormente al grupo de disgregación de la ...
  • Hilbert fractal curves for HTS miniaturized filters 

    Barra Bizinotto, Marilda; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; O'Callaghan Castellà, Juan Manuel (Institute of Electrical and Electronics Engineers, 2004)
    Conference report
    Open Access
    This work presents novel compact High Temperature Superconductor (HTS) microstrip resonators based on Hilbert fractal curves. Their miniaturization performance has been investigated, emphasizing the parameters which allow ...
  • Hilbert Revisited 

    Buchsbaum, David (2009-03-18)
    Audiovisual
    Open Access
    Starting with a look at Hilbert's famous 1890 paper, which was considered at one time to have dealt the deathblow to Invariant Theory, and which inluded the famous Basis Theorem and Syzygy Theorem, we will trace some ...
  • Hilos, tejiendo el territorio: bases paisajísticas para un futuro desarrollo urbano 

    Coves Medina, Mercedes; Kunkel, Liza; Mondéjar Sanmartín, Juan Manuel (Universitat Politècnica de Catalunya, 2012)
    Master thesis
    Open Access
  • HiME: Hierarchical i* Modeling Editor 

    López Cuesta, Lidia; Franch Gutiérrez, Javier; Marco Gómez, Jordi (2009)
    Article
    Open Access
    In this paper, we present HiME, a tool for editing i* models. The distinguishing characteristic of HiME is its ability to deal with inheritance. It includes specific operations for declaring an actor as heir of another and ...
  • Hinchamiento en túneles por crecimiento de cristales y su modelación 

    Ramon Tarragona, Anna; Alonso Pérez de Agreda, Eduardo (Universitat Politécnica de Catalunya. Escola Tècnica Superior d'Enginyers de Camins Canals i Ports de Barcelona, 2011-11-15)
    Conference lecture
    Open Access
    La intensidad del comportamiento expansivo observado en excavaciones de túneles en arcillas sulfatadas es mayor que en otras rocas y suelos expansivos libres de sulfatos. En la mayoría de casos la funcionalidad y la ...
  • Hindered water motions in hardened cement pastes investigated over broad time and length scales 

    Bordallo, H.N.; Aldridge, L.P.; Fouquet, P.; Pardo Soto, Luis Carlos; Unruh, T.; Wuttke, J.; Yokaichiya, F. (2009-09-25)
    Article
    Restricted access - publisher's policy
    We investigated the dynamics of confined water in different hydrated cement pastes with minimized contributions of capillary water. It was found that the water motions are extremely reduced compared to those of bulk water. ...
  • Hinf simultaneous admittance and tracking current controller of three-phase active grid front-ends 

    Pérez, Jorge; Cóbreces Álvarez, Santiago; Rodriguez Sanchez, Francisco Javier; Griñó Cubero, Robert (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Conference report
    Restricted access - publisher's policy
    This paper proposes an H8 current controller that allows power converter input admittance shaping, both in modulus and in phase, in a three phase voltage source converter to grid connection through an L filter. In addition to ...