130,994 research outputs found
UOrtos [Software]
No full textThe algorithm for co-registration and georeferentation of satellite images assumes that images can be realigned through an isometric transformation. The image alignment is achieved by minimising the distances between common image features. Clustering techniques are used to obtain a high quality set of aligned images without outliers. As a result of the process, the metadata information related to the geotransformation of the satellite images (GeoTIFF) is corrected and co-registered PNG images are derived. The development of this software is aimed for obtaining images to accurately determine shoreline displacements. In general, it can be used for the precise detection of features at different times. Details about the algorithm and methodology are described in Simarro, G.; Calvete, D.; Ribas, F.; Castillo Y.; Puig-Polo, C. UOrtos: Methodology for co-registration and subpixel georeferencing of satellite imagery for coastal monitoring. Remote Sens. 2025, https://doi.org/10.3390/rs3511428UOrtos is an open source software to obtain a set of outlier-free co-registered and georeferenced satellite images with high alignment quality.Peer reviewe
Encomio de Mateo Vázquez y heráldica de los Lecca en la "Corsica" de Calvete de Estrella
No full textLa heráldica como parte del discurso panegírico en la poesía del humanista Juan Cristóbal Calvete
de Estrella. Análisis comparativo de las dos versiones de la écfrasis del escudo de armas de Mateo Vázquez de
Leca, secretario privado de Felipe II, para el encomio Corsica de Calvete. Se abordan los motivos que se aducen
para la segunda redacción sustitutoria del pasaje heráldico en relación con el problema del oscuro origen familiar
de Mateo Vázquez.Proyecto de Investigación del Plan Nacional de I+D FFI2012-3109
Self-organized morphological patterns in coastal dynamics
No full textJornades I+D+I
Ponents: Falqués, D. Calvete, N. Van den Berg, F. Ribas, A. Fernández, M. Caballeria
Self-organized morphological patterns in coastal dynamics
No full textJornades I+D+I
Ponents: Falqués, D. Calvete, N. Van den Berg, F. Ribas, A. Fernández, M. Caballeria
Demonstration of the optical limiting effect for an hemiporphyrazine
No full textThe hemiporphyrazine complex 9,22-bis(dibutoxy)hemiporphyrazinato
chloroindium(III) (1) is one of the few examples
for this class of compounds, which displays the nonlinear
optical effect of reverse saturable absorption for nanosecond
laser pulses in the visible spectrum. The high linear transmission
combined with the fast switching into a strongly absorbing
excited state in the same spectral range (400–650 nm), renders
the studied hemiporphyrazine an ideal material for the passive
shuttering of pulsed radiations
Large two-photon absorption cross sections of hemiporphyrazines in the excited state: The multiphoton absorption process of hemiporphyrazines with different central metals
No full textA series of five hemiporphyrazines (Hps) with different coordinating central atoms (H2, GeCl2, InCl, Pt, Pb), and the acyclic derivative 1,3-bis-(6′-amino-4′-butoxy-2′-pyridylimino)-1,3-dihydroisoindoline have been synthesized and their multiphoton absorption properties examined at the second harmonic frequency of the Nd:YAG laser in the nanosecond time regime. Metal-free and platinum Hps display saturation of optical transmittance within incident fluence values of 6 J cm−2. Comparison with other similar molecular structures like phthalocyanines and related molecules shows that Hps are strong nonlinear absorbers. The experimental curves of nonlinear transmission at 532 nm have been fitted by means of a three-level model with the occurrence of simultaneous two-photon absorption from an excited state. In the sole case of the InCl complex we found that a five-level model is needed because of the participation of triplet states. Contrary to phthalocyanines, naphthalocyanines, and porphyrins, a heavy central atom does not improve the nonlinear absorption properties since a different excited states dynamic is involved. The large nonlinear absorption of Hps combined with the very small absorption in the visible spectral range makes these molecules a very interesting class of molecules for nonlinear optical applications
Indium phthalocyanines with different axial ligands: A study of the influence of the structure on the photophysics and optical limiting properties.
No full textThe photophysical properties of four axially substituted indium phthalocyanines, namely, 2,(3)-tetra-tertbutyl-
phthalocyaninato indium chloride (1), 2,(3)-tetra-[(3,5-di-tert-butyl)-phenyloxy]-phthalocyaninato indium
bromide (2), 2,(3)-tetra-[(3,5-di-tert-butyl)-phenyloxy]-phthalocyaninato indium iodide (3), and 2,3-octa-[(2-
hexyl)-ethyloxy]-phthalocyaninato indium trifluoroacetate (4), have been investigated, and their optical limiting
properties with nanosecond light pulses were evaluated. All complexes behave as reverse saturable absorbers
in the range of 400-625 nm due to a triplet-triplet excited-state transition. Excited-state absorption cross
sections and triplet state lifetimes are not significantly affected by the nature of the axial ligand. On the other
hand, remarkable differences in the variation of nonlinear transmittance are observed for 1-4 due to significantly
different intersystem crossing rates. Heavier axial ligands in phthalocyanines 2 and 3 produce the largest
variations of nonlinear transmission (heavy-atom effect). Complex 1 in polystyrene matrix shows reversible
nonlinear absorption when incident fluence does not exceed 0.025 J cm-2
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
Synthesis of axially substituted gallium, indium and thallium phthalocyanines with nonlinear optical properties
No full textArkivoc2006377-9
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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