Now showing items 1-20 of 29

    • A robust comparison of dynamical scenarios in a glass-forming liquid 

      Vispa, Alessandro; Busch, Sebastian; Tamarit Mur, José Luis; Unruh, Tobias; Fernandez-Alonso, Felix; Pardo Soto, Luis Carlos (2016-02-07)
      Article
      Open Access
      We use Bayesian inference methods to provide fresh insights into the sub-nanosecond dynamics of glycerol, a prototypical glass-forming liquid. To this end, quasielastic neutron scattering data as a function of temperature ...
    • Bio-nanohybrid catalysts based on L-leucine immobilized in hydrotalcite and their activity in aldol reaction 

      Crivoi, Dana-Georgiana; Miranda, Ronald Alexander; Finocchio, Elisabetta; Llorca Piqué, Jordi; Ramis, Gianguido; Sueiras, Jesus Eduardo; Segarra González, Anna Maria; Medina Mena, Francisco (2016-06-05)
      Article
      Open Access
      Nanohybrid materials based on L-leucine (L-Leu) and hydrotalcites (HT) were prepared by the ion exchange and reconstruction method, under mild synthesis conditions. The location, amount and the form of the immobilized L-Leu ...
    • Caractérisation des signaux radio avec des outils de traitement d’images 

      Morral Adell, Gemma (Universitat Politècnica de Catalunya, 2011-05-09)
      Master thesis (pre-Bologna period)
      Open Access
      Covenantee:   École nationale supérieure des télécommunications
      Català: Ens basem en una representació 2D en temps-freqüència dels senyals rebuts després d'una detecció no-coherent ("square law detector" és a dir, es prèn el módul al quadrat de les NFFT dels senyals rebuts dins una ...
    • Compact, multi-exposure speckle contrast optical spectroscopy (SCOS) device for measuring deep tissue blood flow 

      Dragojević, Tanja; Hollmann, Joseph L.; Tamborini, Davide; Portaluppi, Davide; Buttafava, Mauro; Culver, Joseph P.; Villa, Federica; Durduran, Turgut (OSA, 2017-12-20)
      Article
      Open Access
      Speckle contrast optical spectroscopy (SCOS) measures absolute blood flow in deep tissue, by taking advantage of multi-distance (previously reported in the literature) or multi-exposure (reported here) approach. This method ...
    • Effects of photon reabsorption phenomena in confocal micro-photoluminescence measurements in crystalline silicon 

      Roige, Abel; Alvarez, J.; Jaffre, A.; Desrues, T.; Martín García, Isidro; Alcubilla González, Ramón; Kleider, J.P. (American Institute of Physics (AIP), 2017-02-14)
      Article
      Open Access
      Confocal micro-photoluminescence (PL) spectroscopy has become a powerful characterization technique for studying novel photovoltaic (PV) materials and structures at the micrometer level. In this work, we present a comprehensive ...
    • Enhanced gamma-ray emission from neutron unbound states populated in beta decay 

      Tain, J. L.; Valencia, E.; Algora, A.; Rubio, B.; Maurice, S.; Gelletly, W.; Fallot, M.; Rissanen, J.; Eronen, T.; Äystö, J.; Batist, L.; Bowry, M.; Caballero Folch, Roger; Gómez Hornillos, María Belén; Gorlychev, V.; Mendoza, E.; Moore, I.; Penttila, H.; Reponen, M.; Sonnenschein, V. (2015-08-06)
      Article
      Open Access
    • Enhanced sensitivity and contrast with bimodal atomic force microscopy with small and ultra-small amplitudes in ambient conditions 

      Santos Hernández, Sergio (2013-12-02)
      Article
      Open Access
      Here, we introduce bimodal atomic force microscopy operated with sub-nm and ultra-small, i.e., sub-angstrom, first and second mode amplitudes in ambient conditions. We show how the tip can be made to oscillate in the ...
    • Hardware simulator for optical correlation spectroscopy with Gaussian statistics and arbitrary correlation functions 

      Molteni, Matteo; Weigel, Udo M.; Remiro, Francisco; Durduran, Turgut; Ferri, Fabio (OSA, 2014-11-04)
      Article
      Open Access
      We present a new hardware simulator (HS) for characterization, testing and benchmarking of digital correlators used in various optical correlation spectroscopy experiments where the photon statistics is Gaussian and the ...
    • Human blue cone opsin regeneration involves secondary retinal binding with analog specificity 

      Srinivasan, Sundaramoorthy; Fernández Sampedro, Miguel Ángel; Morillo Cazorla, Margarita; Ramon Portés, Eva; Jiménez Rosés, Mireia; Cordomi, Arnau; Garriga Solé, Pere (2018-03-27)
      Article
      Open Access
      Human color vision is mediated by the red, green, and blue cone visual pigments. Cone opsins are G-protein-coupled receptors consisting of an opsin apoprotein covalently linked to the 11-cis-retinal chromophore. All visual ...
    • In situ chemical modification of C–S–H induced by CO2 laser irradiation 

      Martínez Ramírez, Sagrario; Díaz Sol, Luis M.; Martín Garrido, Moisés; Fernández Carrasco, Lucía; Torrens Martín, David (2018-02)
      Article
      Open Access
      Fire-induced compositional changes lead to strength loss and even failure in cement and concrete. Calcium silicate hydrate (C–S–H) gel, the main product of cement hydration, dehydrates at 25–200 °C, while temperatures of ...
    • Linear identification and model adjustment of a PEM fuel cell stack 

      Husar, Attila Peter; Kunusch, Cristian; Puleston, Paul; Mayosky, Miguel Á.; Moré, J.J. (Elsevier, 2008)
      Article
      Open Access
      In the context of fuel cell stack control a mayor challenge is modeling the interdependence of various complex subsystem dynamics. In many cases, the states interaction is usually modeled through several look-up tables, ...
    • Liquid phantoms for near-infrared and diffuse correlation spectroscopies with tunable optical and dynamic properties 

      Cortese, Lorenzo; Presti, Giuseppe Lo; Pagliazzi, Marco; Contini, Davide; Mora, Alberto Dalla; Pifferi, Antonio; Venkata Sekar, Sanathana Konugolu; Spinelli, Lorenzo; Taroni, Paola; Zanoletti, Marta; Weigel, Udo M.; Fraguier, Sixte de; Nguyen-Dihn, An; Rosinski, Bogdan; Durduran, Durduran (OSA, 2018-04-04)
      Article
      Open Access
      We present the recipe and characterization for preparing liquid phantoms that are suitable for both near-infrared spectroscopy and diffuse correlation spectroscopy. The phantoms have well-defined and tunable optical and ...
    • Macroporous silicon for spectroscopic CO2 detection 

      Vega, Didac; Marti Alcaire, Ferran; Rodríguez Martínez, Ángel; Todorov Trifonov, Trifon (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      A carbon dioxide sensor based on a photonic crystal of macroporous silicon and measurements of its response are presented in this paper. Photonic crystals have opened new ways for the miniaturization of optical detector ...
    • Multicolour single molecule emission and excitation spectroscopy reveals extensive spectral shifts 

      Piatkowski, Lukasz; Gellings, Esther; Hulst, Niek F. van (The Royal Society of Chemistry, 2015-07-16)
      Article
      Open Access
      We explore the distribution and shape of single molecule spectra at room temperature, when embedded in a polymer host. Multicolour excitation and emission spectroscopy is implemented to capture the full inhomogeneous ...
    • Multidistance diffuse correlation spectroscopy for simultaneous estimation of blood flow index and optical properties 

      Farzam, Parisa; Durduran, Turgut (SPIE, 2015-05-04)
      Article
      Open Access
      Traditionally, diffuse correlation spectroscopy (DCS) measures microvascular blood flow by fitting a physical model to the measurement of the intensity autocorrelation function from a single source-detector pair. This ...
    • Neutron resonance spectroscopy at n TOF at CERN 

      Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (EDP Sciences, 2007)
      Conference report
      Open Access
      Neutron resonance spectroscopy plays an important role in the investigation of neutron induced reaction cross sections and nuclear structure in the MeV excitation range. Neutron time-of-flight facilities are the most used ...
    • New anhydride/epoxy thermosets based on diglycidyl ether of bisphenol A and 10-undecenoyl modified poly(ethyleneimine) with improved impact resistance 

      Acebo Gorostiza, Cristina; Fernández Francos, Xavier; Flor López, Sílvia de la; Ramis Juan, Xavier; Serra Albet, Àngels (2015-08-01)
      Article
      Open Access
      New dendritic modifiers have been synthesized by amidation of hyperbranched poly(ethylenimine)(PEIs) with 10-undecenoic acid to obtain hyperbranched polymers (HBPs) with different degree of modification. These HBPs have ...
    • Noninvasive characterization of the healthy human manubrium using di use optical spectroscopies 

      Farzam, Parisa; Lindner, Claus; Weigel, Udo M.; Suarez, Maria; Urbano-Ispizua, Alvaro; Durduran, Turgut (IOP, 2014-06-05)
      Article
      Open Access
      The abnormal, uncontrolled production of blood cells in the bone marrow causes hematological malignancies which are common and tend to have a poor prognosis. These types of cancers may alter the hemodynamics of bone marrow. ...
    • Observation of the topological Anderson insulator in disordered atomic wires 

      Meier, Eric J.; An, Fangzhao Alex; dauphin, Alexandre; Maffei, Maria; Massignan, Pietro Alberto; Hughes, Taylor L.; Gadway, Bryce (2018-11-23)
      Article
      Open Access
      Topology and disorder have a rich combined influence on quantum transport. In order to probe their interplay, we synthesized one-dimensional chiral symmetric wires with controllable disorder via spectroscopic Hamiltonian ...
    • Pre-clinical longitudinal monitoring of hemodynamic response to anti-vascular chemotherapy by hybrid diffuse optics 

      Farzam, Parisa; Johansson, Johannes; Mireles, Miguel; Jiménez-Valerio, Gabriela; Martínez-Lozano, Mar; Choe, Regine; Casanovas, Oriol; Durduran, Turgut (OSA, 2017-04-19)
      Article
      Open Access
      The longitudinal effect of an anti-vascular endothelial growth factor receptor 2 (VEGFR-2) antibody (DC 101) therapy on a xenografted renal cell carcinoma (RCC) mouse model was monitored using hybrid diffuse optics. Two ...