Browsing by Subject "Espectroscopis"

Now showing items 1-13 of 13

    • Attosecond x - ray transient dynamics 

      Delgado Guerrero, Jorge (Universitat Politècnica de Catalunya, 2017-09-08)
      Master thesis
      Open Access

    • Diffuse reflectance spectroscopy characterization of molecular absorption via graphene based photodetectors 

      Evans, Michael (Universitat Politècnica de Catalunya, 2018-09)
      Master thesis
      60 months embargo
      This Master dissertation explores diffuse reflection spectroscopy as a viable tool for analytical chemistry, both quantitatively and qualitatively. In-vitro optical phantoms are created to mimic the turbid diffuse environments ...

    • Harmonic impedance spectra identification from time-varying bioimpedance : Theory and validation 

      Sánchez Terrones, Benjamín; Louarroudi, Ebrahim; Bragós Bardia, Ramon; Pintelon, Rik (IOP PUBLISHING LTD, 2013-10)
      Article
      Restricted access - publisher's policy
      The harmonic impedance spectra (HIS) of a time-varying bioimpedance Z(ω, t ) is a new tool to better understand and describe complex time-varying biological systems with a distinctive periodic character as, for ...

    • Hopping conductivity and polarization effects in a fullerene derivative salt 

      Macovez, Roberto; Zachariah, Manesh; Romanini, Michela; Zygouri, Panagiota; Gournis, Dimitrios; Tamarit Mur, José Luis (2014-06-12)
      Article
      Restricted access - publisher's policy
      Impedance spectroscopy is employed to probe the frequency-dependent conductivity and dielectric response of the C60O24Na 24 fulleride. The conduction properties of this organic material match the so-called universal behavior ...

    • In vivo electrical bioimpedance characterization of human lung tissue during the bronchoscopy procedure. A feasibility study 

      Sánchez Terrones, Benjamín; Vandersteen, Gerd; Martín Robles, Irene; Castillo Villegas, Diego; Torrego Fernández, Alfons; Riu Costa, Pere Joan; Schoukens, Johan; Bragós Bardia, Ramon (2013-07)
      Article
      Restricted access - publisher's policy
      Lung biopsies form the basis for the diagnosis of lung cancer. However, in a significant number of cases bronchoscopic lung biopsies fail to provide useful information, especially in diffuse lung disease, so more aggressive ...

    • Live monitoring of heart rate and blood oxygenation trend using non-contact IPPG 

      Luna Labrador, Javier (Universitat Politècnica de Catalunya, 2018-07-20)
      Master thesis
      Restricted access - confidentiality agreement

    • Minimal implementation of an AFE4300-based spectrometer for electrical impedance spectroscopy measurements 

      Sánchez Terrones, Benjamín; Praveen, A.; Bartolome, E.; Soundarapandian, K.; Bragós Bardia, Ramon (IOPScience, 2013)
      Conference report
      Open Access
      The AFE4300 is a new low-cost on-chip impedance spectrometer developed by Texas Instruments able to handle multiple four electrode interface measurements. In this work, we present a brief description and characterization ...

    • Narrowband filtering for atom-resonant photon pair generation 

      Torrent Cuairan, Marc (Universitat Politècnica de Catalunya, 2017-10-27)
      Master thesis
      Open Access
      In this master's thesis we study two filtering techniques, first the Faraday anomalous dispersion optical filter (FADOF) and second a monolithic Fabry-Pérot interferometer with the aim of filtering down-converted photon ...

    • Spectroscopic characterization of Er3+, Yb3+ co-doped UC single crystals : the influence of host and sensitizer concentrations 

      Saleta Reig, David (Universitat Politècnica de Catalunya, 2018-10-24)
      Master thesis
      Open Access
      Covenantee:   Bundesanstalt für Materialforschung und -prüfung
      The energy transfer upconversion (ETU) mechanism is known to be the most efficient route for the conversion of near infrared (NIR) light to visible emission in Ln3+-co-doped systems. In this work, we examined these energy ...

    • Terahertz spectroscopy in medical and nutritional applications 

      Salvatella Orgilles, Gerard (Universitat Politècnica de Catalunya, 2010-10-27)
      Master thesis
      Open Access
      English: THz spectroscopy has recently emerged as a novel technology with several advantages with respect to other spectroscopic techniques, such as real–time data acquisition and non–destructive, non–invasive detection ...

    • Towards an accurate bioimpedance identification 

      Sánchez Terrones, Benjamín; Louarroudi, E.; Bragós Bardia, Ramon; Pintelon, Rik (IOPScience, 2013)
      Conference report
      Open Access
      This paper describes the local polynomial method (LPM) for estimating the time- invariant bioimpedance frequency response function (FRF) considering both the output-error (OE) and the errors-in-variables (EIV) identi ...

    • Towards cavity enhanced detection of single ions in the solid-state 

      Van Valkenhoef, Céline Hélène Ida (Universitat Politècnica de Catalunya, 2018-09-06)
      Master thesis
      24 months embargo
      The goal of this master thesis was to take initial steps towards cavity-enhanced detection of single rare-earth ions in the solid state. A fibre microcavity set-up for use with Praseodymium-doped nanocrystals was designed, ...

    • Water-Triggered Conduction Mediated by Proton Exchange in a Hygroscopic Fulleride and Its Hydrate 

      Zachariah, Manesh; Mitsari, Efstratia; Romanini, Michela; Zygouri, Panagiota; Gournis, Dimitrios; Barrio Casado, María del; Tamarit Mur, José Luis; Macovez, Roberto (2015-01-08)
      Article
      Open Access
      Impedance spectroscopy is employed to probe the impact of water on the dc conductivity and ac dielectric response of the polycrystalline C-60(ONa)(24) fulleride, both in its bulk-hydrate form, stable only below 370 K, and ...