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Now showing items 71-80 of 253
Critical behavior and magnetocaloric effect in rare-earth based intermetallic materials.
(2021-11-19)
Esta tesis engloba un detallado estudio de las propiedades térmicas y magnéticas de hasta cinco familias de compuestos intermetálicos basados en tierras raras. En particular, este trabajo se centra en el estudio del ...
Vertical Cracks Excited in Lock-in Vibrothermography Experiments: Identification of Open and Inhomogeneous Heat Fluxes
(MDPI, 2022-03-17)
Lock-in vibrothermography has proven to be very useful to characterizing kissing cracks producing ideal, homogeneous, and compact heat sources. Here, we approach real situations by addressing the characterization of ...
Sizing the Depth and Width of Narrow Cracks in Real Parts by Laser-Spot Lock-In Thermography
(MDPI, 2021-09-28)
We present a complete characterization of the width and depth of a very narrow fatigue crack developed in an Al-alloy dog bone plate using laser-spot lock-in thermography. Unlike visible micrographs, which show many surface ...
Contribution to material thermal characterization techniques and subsurface defect detection using infrared thermography and other imaging methods.
(2017-05-25)
Esta tesis doctoral utiliza métodos de generación de imágenes para estudiar la difusión de calor en una muestra. Dos variantes principales fueron empleadas. La primera utiliza variaciones en el índice de refracción, inducidas ...
Aplicaciones con termografía infrarroja: caracterización de grietas verticales y medida de la difusividad térmica.
(2020-12-02)
En este trabajo se presenta el uso de la termografía infrarroja para desarrollo de ensayos no destructivos enfocados a la detección y caracterización de grietas y la medida de la difusividad térmica de materiales en ...
Optimization of solution-processed oligothiophene:fullerene based organic solar cells by using solvent additives
(Beilstein Institut, 2013-10)
The optimization of solution-processed organic bulk-heterojunction solar cells with the acceptor-substituted quinquethiophene DCV5T-Bu-4 as donor in conjunction with PC61BM as acceptor is described. Power conversion ...
Shortcuts to adiabatic rotation of a two-ion chain
(IOP, 2021-10)
We inverse engineer fast rotations of a transversally tight, linear trap with two ions for a predetermined rotation angle and time, avoiding final excitation. Different approaches are analyzed and compared when the ions ...
STM study on the self-assembly of oligothiophene-based organic semiconductors
(Beilstein Institut, 2011-11)
The self-assembly properties of a series of functionalized regioregular oligo(3-alkylthiophenes) were investigated by using scanning tunneling microscopy (STM) at the liquid-solid interface under ambient conditions. The ...
On-surface synthesis and electronic structure characterization of grafphene nanoribbons.
(2019-11-12)
Esta tesis expone un estudio detallado sobre la síntesis en superficie de nanotiras de grafeno (en inglés 'Graphene Nanoribbons', GNRs) y la posterior caracterización de su estructura electrónica, principalmente empleando ...
Surface state tunable energy and mass renormalization from homothetic quantum dot arrays
(Royal Society of Chemistry, 2019-12-28)
Quantum dot arrays in the form of molecular nanoporous networks are renowned for modifying the electronic surface properties through quantum confinement. Here we show that, compared to the pristine surface state, the band ...