In-medium effects on K-0 mesons in relativistic heavy-ion collisions

We present the transverse momentum spectra and rapidity distributions of pi(-) and K-S(0) in Ar + KCl reactions at a beam kinetic energy of 1.756 A GeV measured with the High Acceptance Di-Electron Spectrometer (HADES). The reconstructed K-S(0) sample is characterized by good event statistics for a wide range in momentum and rapidity. We compare the experimental pi(-) and K-S(0) distributions to predictions by the Isospin Quantum Molecular Dynamics (IQMD) model. The model calculations show that K-S(0) at low transverse momenta constitute a particularly well-suited tool to investigate the kaon in-medium potential. Our K-S(0) data suggest a strong repulsive in-medium K-0 potential of about 40 MeV strength.We gratefully acknowledge the useful discussions with J. Aichelin and H. Oeschler. The HADES collaboration gratefully acknowledges the support by BMBF grants 06TM970I, 06GI146I, 06FY171, and 06DR135 (Germany), by GSI (TMFR1, GI/ME3, OF/STR), by Excellence Cluster of Universe (Germany), by grants GA AS CR IAA100480803 and MSMT LC 07050 (Czech Republic), by grant KBN 5P03B 140 20 (Poland), by INFN (Italy), by CNRS/IN2P3 (France), by grants MCYT FPA2000-2041-C02-02 and XUGA PGID T02PXIC20605PN (Spain), by grant UCY-10.3.11.12 (Cyprus), by INTAS grant 06-1000012-8861 and EU contract RII3-CT-2004-506078.Peer reviewe

Anatomy of corpus callosum in prenatally malnourished rats

Indexación: Web of Science; ScieloThe effect of prenatal malnutrition on the anatomy of the corpus callosum was assessed in adult rats (45-52 days old). In the prenatally malnourished animals we observed a significant reduction of the corpus callosum total area, partial areas, and perimeter, as compared with normal animals. In addition, the splenium of corpus callosum (posterior fifth) showed a significant decrease of fiber diameters in the myelinated fibers without changing density. There was also a significant decrease in diameter and a significant increase in density of unmyelinated fibers. Measurements of perimeter's fractal dimensions from sagittal sections of the brain and corpus callosum did not show significant differences between malnourished and control animals. These findings indicate that cortico-cortical connections are vulnerable to the prenatal malnutrition, and suggest this may affect interhemispheric conduction velocity, particulary in visual connections (splenium).http://ref.scielo.org/nph4s

Proyecto Concrecas SAS elaboración de un aditivo para el fortalecimiento del Cemento y Concreto

Trabajo de Síntesis AplicadaEl presente trabajo tiene como propósito realizar la formulación y evaluación técnica y financiera del proyecto para la creación de una procesadora de ceniza de cascarilla de arroz en el municipio de Espinal en el departamento de Tolima, el cual busca hacer un mejor uso de los desperdicios de las cosechas, para realizar un proceso de transformación basado en la producción de ceniza, material apropiado para ser utilizado como aditivo en el diseño de concretos de alta resistencia. En Colombia se pretende promover la utilización de la ceniza de cascarilla de arroz para diseñar concretos. Los hormigones siempre se han elaborado con humo de sílice obtenido de las fundiciones de silicio. Este elemento al no encontrarse en el país debe ser importado del exterior lo que ocasiona un incremento en los costos de la obra. El alcance de este trabajo será presentar el estudio técnico, financiero y administrativo necesarios para la evaluación de viabilidad del proyecto en el mercado, donde sus resultados permitirán plantear estrategias para la puesta en marcha de la empresa, igualmente influye de manera significativa en las posibles soluciones a los problemas de comercialización de cascarilla que se viven en la región, tanto de manera social como proyecto de mejora de las condiciones de trabajo de los cultivadores de arroz y en el aspecto económico como futura fuente generadora de empleo.Resumen Palabras Clave (KeyWords) 1. Planteamiento del Problema 2. Justificación 3. Objetivos 4. Marco Referencial 5. Marco Teórico 6. Marco de Antecedentes Conclusiones BibliografíaEspecializaciónEspecialista en Formulación y Evaluación Social y Económica de Proyecto

Consultoría Integral en una empresa constructora de obra electromecánica, obra civil y servicios en el municipio de Zapopan

ITESO, A.C

DEM shading method for the correction of pseudoscopic effect on multi-platform satellite imagery

This is an Accepted Manuscript of an article published by Taylor & Francis in GIScience & Remote Sensing on 2014, available online: http://www.tandfonline.com/10.1080/15481603.2014.988433The pseudoscopic effect in satellite imagery causes perception problems for rugged terrain. The topographic relief is perceived in reverse in images with southeast illumination because of the position of land shadows and the mechanisms of human vision and depth perception. This article presents a correction method for false topographic perception phenomena. Superposition of the orthoimage and the correctly shaded digital elevation model (DEM) provides the correct three-dimensional visualization of the relief. This study demonstrates the applicability of this processing technique for the correction of such effects to provide cartography with a more useful interpretation. The resolution of the DEM employed should be in accordance with the spatial resolution of each image. The opacity level proposed for the overlapping DEM is 50%, 30% and 45% for each image type. The selection of the most appropriate local incidence angle is determined by the level of terrain roughness in the work areaWe want to thank the Galician Territorial Information System (SITGA) for the images and the cartographic material provided for the realization of this workS

Combining fMRI and DISC1 gene haplotypes to understand working memory‑related brain activity in schizophrenia

Schizophrenia; Magnetic Resonance Imaging; HaplotypesEsquizofrenia; Resonancia Magnética; HaplotiposEsquizofrènia; Ressonància magnètica; HaplotipsThe DISC1 gene is one of the most relevant susceptibility genes for psychosis. However, the complex genetic landscape of this locus, which includes protective and risk variants in interaction, may have hindered consistent conclusions on how DISC1 contributes to schizophrenia (SZ) liability. Analysis from haplotype approaches and brain-based phenotypes can contribute to understanding DISC1 role in the neurobiology of this disorder. We assessed the brain correlates of DISC1 haplotypes associated with SZ through a functional neuroimaging genetics approach. First, we tested the association of two DISC1 haplotypes, the HEP1 (rs6675281-1000731-rs999710) and the HEP3 (rs151229-rs3738401), with the risk for SZ in a sample of 138 healthy subjects (HS) and 238 patients. This approach allowed the identification of three haplotypes associated with SZ (HEP1-CTG, HEP3-GA and HEP3-AA). Second, we explored whether these haplotypes exerted differential effects on n-back associated brain activity in a subsample of 70 HS compared to 70 patients (diagnosis × haplotype interaction effect). These analyses evidenced that HEP3-GA and HEP3-AA modulated working memory functional response conditional to the health/disease status in the cuneus, precuneus, middle cingulate cortex and the ventrolateral and dorsolateral prefrontal cortices. Our results are the first to show a diagnosis-based effect of DISC1 haplotypes on working memory-related brain activity, emphasising its role in SZ

Late-onset Candida keratitis after Descemet stripping automated endothelial keratoplasty : clinical and confocal microscopic report

Purpose. To report clinical and confocal microscopy features of late-onset Candida albicans keratitis after Descemet stripping automated keratoplasty (DSAEK). Methods. We performed clinical and confocal scan on a patient who underwent DSAEK and phacoemulsification for Fuchs endothelial dystrophy and cataract. Results. A 76-year-old woman who underwent uneventful DSAEK and phacoemulsification presented with white to cream deposits 3 months after DSAEK. Confocal microscopy showed a hyperintense deposit at the lenticule and interface. Confocal scan also disclosed intense haze and inflammation at the interface and clusters of hyperreflective round structures resembling epithelial cells within the interface area. No signs of hyphae-like structures were seen. Late-onset symptoms misled us into a bacterial chronic endophthalmitis diagnosis, and the patient was started on topical and systemic antibiotics. Despite intense antibiotic therapy, the patient developed severe endophthalmitis, so we performed anterior vitrectomy and the donor lenticule was removed. Microbiology results from the removed lenticule showed infection by C albicans. Antifungal therapy with systemic and topical voriconazole controlled the infection. Conclusions. Candida interface keratitis is possible after DSAEK. The posterior location of infected tissue poses diagnostic and therapeutic challenges. In our case, the late onset of the symptoms and not performing corneoscleral rim cultures delayed correct diagnosis. This is the first reported case of post-DSAEK Candida keratitis with confocal microscopy images. A hyperintense granular deposit was seen at the lenticule and interface with confocal microscopy. We also observed intense haze, granular round structures resembling epithelial cells, and hyperreflective needle-shaped material at the interface. No hyphae-like structures were seen with confocal imaging

Prevalence and risk factors of posttraumatic stress disorder in COVID-19

Posttraumatic stress disorder (PTSD) has a prevalence of 2%–5% in the general population. COVID-19 is regarded as a traumatic agent that can increase the prevalence of this disorder to up to 30%. A documentary review was thus conducted, which included 13 studies on the presence of PTSD in patients who have survived COVID-19 infection and the possible associated factors. Female and young age, as well as other aspects associated with economic losses or living alone, could influence the appearance of this psychological sequela. A preventive mental healthcare program could be implemented during infection in such patients with COVID-19 who show the characteristics described in most studies

Analysis of a superbolide from a Damocloid observed over Spain on July 13, 2012

A superbolide with an estimated absolute magnitude of-20±1was seen on 2012 July 13 over the centre and south of Spain. This extraordinary event, which was witnessed by numerous casual observers, was recorded in the framework of the continuous fireball monitoring and meteor spectroscopy campaign performed by the SPanish Meteor Network (SPMN). Thus, because of optimal weather conditions, the bolide was imaged from 10 meteor observing stations. Here we present the analysis of this magnificent event, which is the brightest fireball ever recorded by our team. The atmospheric trajectory of the bolide and the orbit in the Solar system of the parent meteoroid were obtained. The emission spectrum produced during the ablation of this particle is also discussed.We found that the meteoroid, which was following a Halley Type Comet orbit, was depleted in Na and had a tensile strength one order of magnitude higher than that corresponding to typical cometary materials. By means of orbital analysis tools we have investigated the likely parent body of this particle and the results suggest that the progenitor is a damocloid. The impact area of the hypothetical remnants of the meteoroid is also given and a search for meteorites was performed, but none was found.Ministerio de Ciencia e Innovación AYA2009-13227 AYA2009-06330-E AYA2011-26522Junta de Andalucía P09-FQM-455

Análisis petrográficos de rocas silíceas en el centro-este de la provincia de San Luis

En este trabajo se presentan los primeros resultados obtenidos en la caracterización de la Base Regional de Recursos Líticos en las cuencas alta y media del río Quinto (centro-este de la Provincia de San Luis). Los trabajos de campo fueron planificados desde la arqueológica distribucional y la geoarqueología, con el objetivo de localizar fuentes de materia prima lítica potenciales y aquellas utilizadas por los grupos locales. A nivel macroregional, el cuarzo es la principal materia prima lítica registrada en sitios arqueológicos. Sin embargo, los antecedentes arqueológicos mencionan la utilización de rocas silíceas de calidad superior para la talla. En este sentido, solo tres fuentes de este tipo fueron sistemáticamente estudiadas en la provincia. El análisis petrográfico permitió determinar la presencia de tres nuevas fuentes potenciales de rocas silíceas, identificadas microscópicamente como calcedonias.Neste artigo, apresentamos os primeiros resultados obtidos na caracterização da Base Regional de Recursos Lógicos nas bacias superior e média do rio Quinto (leste central da Província de San Luis). Os trabalhos de campo foram planejados a partir da arqueologia e geoarqueologia distributiva, com o objetivo de localizar fontes de matérias-primas líticas potenciais e as utilizadas pelos grupos locais. No nível macrorregional, o quartzo é a principal matéria-prima lítica registrada em sítios arqueológicos. No entanto, o registro arqueológico mencionou o uso de rochas siliciosas de qualidade superior para o tamanho. Nesse sentido, apenas três fontes deste tipo foram estudadas sistematicamente na província. A análise petrográfica permitiu determinar a presença de três novas fontes potenciais de rochas silíceas, identificadas microscopicamente como calcedônia.In this paper we present the first results obtained in the characterization of the Regional Base of Lithic Resources in the upper and middle basins of the Quinto River (east-central of the Province of San Luis). The field works were planned from the distributional archeology and geoarchaeology, with the aim of locating sources of potential lithic raw material and those used by local groups. At the macroregional level, quartz is the main lithic raw material registered in archaeological sites. However, the archaeological record mentioned the use of siliceous rocks of superior quality for the size. In this sense, only three sources of this type were systematically studied in the province. The petrographic analysis allowed to determine the presence of three new potential sources of siliceous rocks, identified microscopically as chalcedonies.Fil: Borgo, Mariangeles. Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Departamento de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis; ArgentinaFil: Ramos, Gabriel Alejandro. Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Departamento de Geología; ArgentinaFil: Heider, Guillermo. Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Departamento de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis; ArgentinaFil: Chiesa, Jorge Orlando. Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Departamento de Geología; ArgentinaFil: Ortiz Suarez, Ariel Emilio. Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Departamento de Geología; ArgentinaFil: Curtoni, Rafael Pedro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano. Universidad Nacional del Centro de la Provincia de Buenos Aires. Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano; ArgentinaFil: Gil, Raul Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Química de San Luis. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Instituto de Química de San Luis; Argentin