A quaternion deterministic monogenic CNN layer for contrast invariance

Deep learning (DL) is attracting considerable interest as it currently achieves remarkable performance in many branches of science and technology. However, current DL cannot guarantee capabilities of the mammalian visual systems such as lighting changes. This paper proposes a deterministic entry layer capable of classifying images even with low-contrast conditions. We achieve this through an improved version of the quaternion monogenic wavelets. We have simulated the atmospheric degradation of the CIFAR-10 and the Dogs and Cats datasets to generate realistic contrast degradations of the images. The most important result is that the accuracy gained by using our layer is substantially more robust to illumination changes than nets without such a layer.The authors would like to thank to CONACYT and Barcelona supercomputing Center. Sebastián Salazar-Colores (CVU 477758) would like to thank CONACYT (Consejo Nacional de Ciencia y Tecnología) for the financial support of his PhD studies under Scholarship 285651. Ulises Moya and Ulises Cortés are member of the Sistema Nacional de Investigadores CONACyT.Peer ReviewedPostprint (author's final draft

Fast single image defogging with robust sky detection

Haze is a source of unreliability for computer vision applications in outdoor scenarios, and it is usually caused by atmospheric conditions. The Dark Channel Prior (DCP) has shown remarkable results in image defogging with three main limitations: 1) high time-consumption, 2) artifact generation, and 3) sky-region over-saturation. Therefore, current work has focused on improving processing time without losing restoration quality and avoiding image artifacts during image defogging. Hence in this research, a novel methodology based on depth approximations through DCP, local Shannon entropy, and Fast Guided Filter is proposed for reducing artifacts and improving image recovery on sky regions with low computation time. The proposed-method performance is assessed using more than 500 images from three datasets: Hybrid Subjective Testing Set from Realistic Single Image Dehazing (HSTS-RESIDE), the Synthetic Objective Testing Set from RESIDE (SOTS-RESIDE) and the HazeRD. Experimental results demonstrate that the proposed approach has an outstanding performance over state-of-the-art methods in reviewed literature, which is validated qualitatively and quantitatively through Peak Signal-to-Noise Ratio (PSNR), Naturalness Image Quality Evaluator (NIQE) and Structural SIMilarity (SSIM) index on retrieved images, considering different visual ranges, under distinct illumination and contrast conditions. Analyzing images with various resolutions, the method proposed in this work shows the lowest processing time under similar software and hardware conditions.This work was supported in part by the Centro en Investigaciones en Óptica (CIO) and the Consejo Nacional de Ciencia y Tecnología (CONACYT), and in part by the Barcelona Supercomputing Center.Peer ReviewedPostprint (published version

Primer avance metodológico del estudio de la Cultura Material del poblado de Peñalosa, Jaén

En este trabajo se muestran los resultados del estudio morfométrico d e los materiales cerámicos de Peñalosa y del estudio microespacial de la distribución de los objetos en diferentes espacios de la zona norte del poblado de la Edad dle Bronce.Consejería de Cultura de la Junta de Andalucía Universidad de Granad

Detection, counting, and classification of visual ganglia columns of drosophila pupae

Many neurobiologists use the fruit fly (Drosophila) as a model to study neuron interaction and neuron organization and then extrapolate this knowledge to the nature of human neurological disorders. Recently, the fluorescence microscopy images of fruit-fly neurons are commonly used, because of the high contrast. However, the detection of the neurons or cells is compromised by background signals, generating fuzzy boundaries. As a result, it is still common that in many laboratories, the detection, counting, and analysis of this microscope imagery is still a manual task. An automated detection, counting, and morphological analysis of these images can provide faster data processing and easier access to new information. The main objective of this work is to present a semi-automatic detection-counting system and give the main characteristics of images of the visual ganglia columns in Drosophila. We present the semi-automatic detection, count, segmentation and we concluded that it is possible to obtain an accuracy of 75% (with a Kappa statistic of 0.50) in the shape classification. Additionally, we develop python GUI CC Analyzer which can be used by neurobiology laboratories whose research interests are focused on this topic.Peer ReviewedPostprint (published version

Recensiones [Revista de Historia Económica Año XI Invierno 1993 n. 1 pp. 209-243]

Editada en la Universidad Carlos IIILutgardo García Fuentes. Sevilla, los vascos y América. (Las exportaciones de hierro, manufacturas metálicas en los siglos XVI, XVII y XVIII) (Por Rafael Uñarte Ayo).-- Enrique Tandeter. Coacción y mercado. La minería de la plata en el Potosí Colonial 1692-1826 (Por Zacarías Moutoukias).-- Manuel Miño Grijalva. Obrajes y tejedores en Hueva España (1700-1810) (Por Pedro Pérez Herrero).-- Luis Perdices Blas.Pablo de Olavide (1725-1803), el Ilustrado (Por Victoriano Martin Martín).-- Daniel Peribáñez Caveda. Comunicaciones y comercio marítimo en la Asturias preindustrial (1750-1850) (Por José Ramón García López).-- Vicent Llombart.Campomanes, economista y político de Carlos III (Por Luis Perdices Blas).-- M. Teresa Pérez Picazo.El mayorazgo en la historia económica de la región murciana, expansión, crisis y abolición (siglos XVIII-XIX) (Por Juan Antonio Carmona Pidal).-- Nelson Lourenço. Familia rural e industria. Mudanga social na regido de Leiria (Por Carmen Sarasúa García).-- Blanca Sánchez Alonso.La inmigración española en Argentina, siglos XIX y XX (Por José Moya).-- Gianni Toniolo.An Economic History qf Liberal Italy, 1859-1918 (Por Francesco L. Galassi).-- Albert Carreras. Estadísticas históricas de España. Siglos XIX-XX (Por Sebastian Coll Martín)Publicad

Reef environments of Murciélago Islands and Santa Elena peninsula, Guanacaste conservation area, Costa Rican pacific

The ecology of the marine environments of the Murciélago Islands and the Santa Elena Peninsula have been studied little despite their high biodiversity. This area is influenced by a coastal upwelling. In 2014, 2016 and 2018, the region was visited to assess the composi-tion and diversity of its reef environments. Bottom coverage, macroinvertebrate diversity and abundance, and reef fish biomass were quantified. The substrate was dominated by turf and crustose calcareous algae. Live coral coverage has decreased compared to previous reports for the area. Sea urchins were the macroinvertebrates with the highest densities, while species of commercial interest presented low densities, this may suggest some degree of fishing pressure. 84 reef fish species were identified, making the islands area with the greatest diversity of reef fish in the North Pacific of Costa Rica. Coral biotopes in this region are key to the conservation of connectivity between reef areas due to their high diversity.Las Islas Murciélago y la península de Santa Elena han sido ambientes marinos poco estudiados a pesar de la alta biodiversidad de sus ecosistemas. Esta zona está influenciada por un afloramiento costero. En el 2014, 2016 y 2018 se visitó la región para evaluar la composición y diversidad de sus ambientes arrecifales. Se cuantificó la cobertura del fon-do, la diversidad y abundancia de macroinvertebrados y la biomasa de peces arrecifales. El sustrato estuvo dominado por tapetes algales (turf) y algas calcáreas costrosas. La cobertura de coral vivo se ha reducido con lo previamente reportado para la zona. Los erizos de mar tuvieron las densidades más altas entre los macroinvertebrados, mientras que especies de interés comercial presentaron bajas densidades, lo que sugiere cierta presión pesquera. Se observaron 84 especies de peces arrecifales, lo que hace de esta área una de las mayores diversidades del Pacífico norte de Costa Rica, esto puede atribuirse a la presencia de áreas marinas protegidas. Los biotopos coralinos de esta región son claves para la conservación de la conectividad entre zonas arrecifales, debido a su alta diversidad

La organización del territorio en el Alto Guadalquivir entre el IV y el III milenios (3300-2800 a.c.)

En este artículo se pretenden analizar los cambios en el patrón de asentamiento que tienen lugar en la transición entre le IV y el III milenios A.C. en el Alto Guadalquivir y especialmente en la Depresión Linares-Bailén.Consejería de Cultura de la Junta de Andalucí

Estudio comparativo in vitro del grado de penetración y microfiltración de dos selladores de fosas y fisuras (ionomérico y resinas): influencia en la técnica de aplicación

Objetives: to compare the penetration capacity and the degree of microfiltration between a resinous sealant and an ionomer with and without ameloplasty, and with or without the placement of an adhesive prior to the placement of the resinous sealant. Methodology: 90 donated premolars, free of caries obtained previous indication orthodontic, later prophylaxis, were divided into six groups, in G1: ameloplasty was performed, acid etching, resinous sealant application, G2: ameloplasty, acid etching, adhesive application and sealant resinous, G3: acid etching, application of adhesive and resinous sealant, G4: application of ionomeric sealant, G5: acid etching, application of resinous sealant, G6: ameloplasty, application of ionomeric sealant. After thermocycling, the teeth were sectioned and the fragments observed under stereomicroscope and observation to the Scanning Electron Microscope. Results: he lowest degree of microfiltration was detected in the group undergoing ameloplasty, acid etching, application of adhesive and resinous sealant (0.198 mm). There was greater penetration of the sealant with the ameloplasty technique. Conclusions: The placement of adhesive prior to the resinous sealant influenced the degree of microfiltration, and the performance of ameloplasty helps with greater penetration of the sealant material.Objetivos: comparar la capacidad de penetración y el grado de microfiltración entre un sellador resinoso y un ionomérico, con y sin ameloplastía; y, con o sin la colocación de un adhesivo previo a la colocación del sellante resinoso. Metodología: La muestra estuvo compuesta por 90 premolares libres de caries, con posterior profilaxis. Fueron divididos en seis grupos, G1: se realizó ameloplastía, grabado ácido y aplicación de sellante resinoso, G2: ameloplastía, grabado ácido, aplicación de adhesivo y sellante resinoso, G3: grabado ácido, aplicación de adhesivo y sellante resinoso, G4: aplicación de sellante ionomérico, G5: grabado ácido y aplicación de sellante resinoso, G6: ameloplastía y aplicación de sellante ionomérico. Tras el termociclado, los dientes fueron seccionados y observados los fragmentos bajo estereomicroscopio y observación al Microscopio Electrónico de Barrido. Resultados: el menor grado de microfiltración fue detectado en el grupo sometido a ameloplastía, grabado ácido, aplicación de adhesivo y sellante resinoso (0,198 mm). Existió mayor penetración del sellante con la técnica de ameloplastía. Conclusiones: La colocación de adhesivo previo al sellante resinoso influyó en el grado de microfiltración y la realización de ameloplastía ayuda con una mayor penetración del material sellador

ATLAS search for a heavy gauge boson decaying to a charged lepton and a neutrino in pp collisions at root s=7 TeV

The ATLAS detector at the LHC is used to search for high-mass states, such as heavy charged gauge bosons (W'), decaying to a charged lepton (electron or muon) and a neutrino. Results are presented based on the analysis of pp collisions at a center-of-mass energy of 7 TeV corresponding to an integrated luminosity of 4.7 fb(-1). No excess beyond Standard Model expectations is observed. A W' with Sequential Standard Model couplings is excluded at the 95 % credibility level for masses up to 2.55 TeV. Excited chiral bosons (W*) with equivalent coupling strength are excluded for masses up to 2.42 TeV

Dynamics of isolated-photon plus jet production in pp collisions at root s=7 TeV with the ATLAS detector

The dynamics of isolated-photon plus jet production in pp collisions at a centre-of-mass energy of 7 TeV has been studied with the ATLAS detector at the LHC using an integrated luminosity of 37 pb(-1). Measurements of isolated-photon plus jet bin-averaged cross sections are presented as functions of photon transverse energy, jet transverse momentum and jet rapidity. In addition, the bin-averaged cross sections as functions of the difference between the azimuthal angles of the photon and the jet, the photon jet invariant mass and the scattering angle in the photon jet centre-of-mass frame have been measured. Next-to-leading-order QCD calculations are compared to the measurements and provide a good description of the data, except for the case of the azimuthal opening angle