Browsing by Subject "Espectroscopis"
Now showing items 1-20 of 20
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Advanced optical technologies for phytoplankton discrimination : application in adaptive ocean sampling networks
(Universitat Politècnica de Catalunya, 2016-01-25)
Doctoral thesis
Open AccessThere is a lack on ocean dynamics understanding, and that lead oceanographers to the need of acquiring more reliable data to study ocean characteristics. Oceanographic measurements are difficult and expensive but essential ... -
Attosecond x - ray transient dynamics
(Universitat Politècnica de Catalunya, 2017-09-08)
Master thesis
Open Access -
Development of devices and techniques for electroporation and electrical impedance spectroscopy analysis of adherent cells
(Universitat Politècnica de Catalunya, 2015-04-24)
Doctoral thesis
Open AccessThe present PhD dissertation is focused on the design and implementation of a microelectrode system capable of performing electroporation and electrical impedance measurements to adherent cell monolayers cultured in standard ... -
Diffuse optical monitoring of cerebral hemodynamics in experimental and clinical neurology
(Universitat Politècnica de Catalunya, 2015-01-31)
Doctoral thesis
Open AccessThe study of the brain using diffuse optical methods has progressed rapidly in the recent years. The possibility of studying the cerebral microvasculature in addition to the portability and low cost of these devices, opens ... -
Diffuse reflectance spectroscopy characterization of molecular absorption via graphene based photodetectors
(Universitat Politècnica de Catalunya, 2018-09)
Master thesis
Open AccessThis 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
(IOP PUBLISHING LTD, 2013-10)
Article
Restricted access - publisher's policyThe 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
(2014-06-12)
Article
Restricted access - publisher's policyImpedance 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 ... -
Implementación y evaluación de un espectroscopio óptico con guía de ondas
(Universitat Politècnica de Catalunya, 2022-02-08)
Master thesis
Restricted access - author's decisionEn este proyecto se expondrá el diseño, implementación y desarrollo de un espectroscopio óptico con guía de ondas, conocido como OWLS,”Optical Waveguide Lightmode Spectroscopy” y su posterior evaluación, realizando medidas ... -
In vivo electrical bioimpedance characterization of human lung tissue during the bronchoscopy procedure. A feasibility study
(2013-07)
Article
Restricted access - publisher's policyLung 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 ... -
Investigation of continuous-wave range-resolved lidar systems for gas detection and concentration measurement
(Universitat Politècnica de Catalunya, 2011-07-27)
Doctoral thesis
Open AccessThe techniques for detection of the atmosphere constituents and their distribution in the space have evolved in the last years driven by needs in the environmental, meteorological and climate science fields and backed by ... -
Live monitoring of heart rate and blood oxygenation trend using non-contact IPPG
(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
(IOPScience, 2013)
Conference report
Open AccessThe 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
(Universitat Politècnica de Catalunya, 2017-10-27)
Master thesis
Open AccessIn 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 ... -
Quantum metrology with high-density atomic vapors and squeezed states of light
(Universitat Politècnica de Catalunya, 2016-10-14)
Doctoral thesis
Open AccessNowadays there is a considerable progress in optical magnetometry and spin noise spectroscopy, which use magnetically-sensitive atomic ensembles and optical read-out, approaching the limits set by quantum mechanics. In ... -
Quantum-based spectroscopy and efficient energy transport with biomolecules
(Universitat Politècnica de Catalunya, 2014-09-30)
Doctoral thesis
Open AccessFor many years, the fields of quantum optics and biology have rarely shared a common path. In quantum optics, most of the concepts and techniques developed over the years stand for systems where only a few degrees of freedom ... -
Spectroscopic characterization of Er3+, Yb3+ co-doped UC single crystals : the influence of host and sensitizer concentrations
(Universitat Politècnica de Catalunya, 2018-10-24)
Master thesis
Open Access
Covenantee: Bundesanstalt für Materialforschung und -prüfungThe 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
(Universitat Politècnica de Catalunya, 2010-10-27)
Master thesis
Open AccessEnglish: 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
(IOPScience, 2013)
Conference report
Open AccessThis 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
(Universitat Politècnica de Catalunya, 2018-09-06)
Master thesis
Open AccessThe 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
(2015-01-08)
Article
Open AccessImpedance 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 ...