428 research outputs found
Three-dimensional finite element modelling of stack pollutant emissions
In this paper we propose a finite element method approach formodelling the air quality in a local scale over complex terrain. The area of interest is up to tens of kilometres and it includes pollutant sources. The proposed methodology involves the generation of an adaptive tetrahedral mesh, the computation of an ambient wind field, the inclusion of the plume rise effect in the wind field, and the simulation of transport and reaction of pollutants. The methodology is used to simulate a fictitious pollution episode in La Palma island (Canary Island, Spain).Peer ReviewedPostprint (published version
Educación para el desarrollo en centros de capacitación en åreas rurales: el caso del CEDECAP en Latinoamérica
Soluciones PrĂĄcticas - ITDG, IngenierĂa Sin Fronteras y la Universitat PolitĂšcnica de Catalunya, estĂĄn llevando a cabo conjuntamente en PerĂș una propuesta de formaciĂłn en distintos ĂĄmbitos tecnolĂłgicos desde una perspectiva de aumento de capacidades para la promociĂłn del desarrollo humano y sostenible dirigida a campesinos, lĂderes comunitarios, responsables polĂticos y estudiantes de titulaciones de grado (Norte y Sur). Las posibilidades de una regiĂłn para desarrollar un futuro sostenible dependen de la capacidad de su gente e instituciones. Con el impulso de un Centro de DemostraciĂłn y CapacitaciĂłn (CEDECAP), se intenta, no sĂłlo desarrollar capacidades, sino favorecer el trabajo en red, la conectividad social, el intercambio y la interacciĂłn entre los diferentes actores involucrados en el desarrollo sostenible de la regiĂłn. Gracias a la interacciĂłn entre las entidades promotoras con diferentes grupos de desarrollo y defensa de derechos locales e internacionales, la propuesta del CEDECAP ha incorporado a la mĂĄs tradicional formaciĂłn en prĂĄcticas y conocimientos adaptados a situaciones de promociĂłn del desarrollo en contextos de escasos recursos, una dimensiĂłn Ă©tica que parte de la experiencia de promociĂłn de la participaciĂłn como eje clave del desarrollo a escala local. La experiencia se ha planteado desde una perspectiva de EcuaciĂłn para el Desarrollo en el ĂĄmbito tecnolĂłgico, enriqueciendo el trabajo desarrollado en los programas de actuaciĂłn impulsados en España.Postprint (published version
Mosquito alert: leveraging citizen science to create a GBIF mosquito occurrence dataset
The Mosquito Alert dataset includes occurrence records of adult mosquitoes collected worldwide in 2014-2020 through Mosquito Alert, a citizen science system for investigating and managing disease-carrying mosquitoes. Records are linked to citizen science-submitted photographs and validated by entomologists to determine the presence of five targeted European mosquito vectors: Aedes albopictus, Ae. aegypti, Ae. japonicus, Ae. koreicus, and Culex pipiens. Most records are from Spain, reflecting Spanish national and regional funding, but since autumn 2020 substantial records from other European countries are included, thanks to volunteer entomologists coordinated by the AIM-COST Action, and to technological developments to increase scalability. Among other applications, the Mosquito Alert dataset will help develop citizen science-based early warning systems for mosquito-borne disease risk. It can also be reused for modelling vector exposure risk, or to train machine-learning detection and classification routines on the linked images, to assist with data validation and establishing automated alert systems
Chromatin-associated regulation of sorbitol synthesis in flower buds of peach
[EN] Key message PpeS6PDH gene is postulated to mediate sorbitol synthesis in flower buds of peach concomitantly with specific chromatin modifications.
Abstract Perennial plants have evolved an adaptive mechanism involving protection of meristems within specialized structures named buds in order to survive low temperatures and water deprivation during winter. A seasonal period of dormancy further improves tolerance of buds to environmental stresses through specific mechanisms poorly known at the molecular level. We have shown that peach PpeS6PDH gene is down-regulated in flower buds after dormancy release, concomitantly with changes in the methylation level at specific lysine residues of histone H3 (H3K27 and H3K4) in the chromatin around the translation start site of the gene. PpeS6PDH encodes a NADPH-dependent sorbitol-6-phosphate dehydrogenase, the key enzyme for biosynthesis of sorbitol. Consistently, sorbitol accumulates in dormant buds showing higher PpeS6PDH expression. Moreover, PpeS6PDH gene expression is affected by cold and water deficit stress. Particularly, its expression is up-regulated by low temperature in buds and leaves, whereas desiccation treatment induces PpeS6PDH in buds and represses the gene in leaves. These data reveal the concurrent participation of chromatin modification mechanisms, transcriptional regulation of PpeS6PDH and sorbitol accumulation in flower buds of peach. In addition to its role as a major translocatable photosynthate in Rosaceae species, sorbitol is a widespread compatible solute and cryoprotectant, which suggests its participation in tolerance to environmental stresses in flower buds of peach.This work was funded by the Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA)-FEDER (RF2013-00043-C02-02) and the Ministry of Science and Innovation of Spain (AGL2010-20595). 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Outcomes from elective colorectal cancer surgery during the SARS-CoV-2 pandemic
This study aimed to describe the change in surgical practice and the impact of SARS-CoV-2 on mortality after surgical resection of colorectal cancer during the initial phases of the SARS-CoV-2 pandemic
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