100333 research outputs found
Sort by
New upper limits for β-delayed fission probabilities of 230,232Fr and 230,232,234Ac
No full textArtículo firmado por 51 autores.
FWO: Contract 1167324N
SRDA: Contract APVV-22-0282
BMBF: Contract 05P21PKCI1
Marie Skłodowska-Curie: 101025651
Marie Skłodowska-Curie: Innovative Training Network 861198 (LISA)
Polish Ministry of Science and Higher Education: Contract 2021/WK/07The process of /3-delayed fission (/3DF) of 230,232Fr and 230,232,234Ac was studied in an experiment performed at the ISOLDE facility at CERN. As no fission fragments were observed for any of the nuclei investigated, upper limits for their /3DF probability (P/3DF) were determined. The experimental results were compared with theoretical calculations that were first benchmarked on 178,180Tl P/3DF experimental values. The P/3DF values were calculated using the code TALYS to which /3-strength functions obtained from the D1M Gogny parametrization and from the Skyrme functional SKO' were given as input together with fission paths obtained with BSkG3 and BSk14 models. Sensitivity studies of different /3-strength functions, and fission paths scaling on the P/3DF values were conducted, suggesting a stronger dependence of the P/3DF on the fission paths rather than on the /3-strength function used.Research Foundation Flanders FWO (Belgium)Fonds de la Recherche Scientifique (Belgique)KU Leuven Internal Funds: Special Research Fund (BOF) (Belgique)Science and Technology Facilities Council (United Kingdom )Research and Development Agency (Slovakia)Federal Ministry of Research, Technology and Space (Germany)Institute of Atomic Physics (Romania)European CommissionMinistry of Science and Higher Education (Poland)National Science Center (Poland)Depto. de Estructura de la Materia, Física Térmica y ElectrónicaFac. de Ciencias FísicasInstituto de Física de Partículas y del Cosmos (IPARCOS)TRUEpu
Embedded Systems on Alhambra-II board
No full textTrabajo de Fin de Grado en Arquitectura de Computadores, Facultad de Informática UCM, Departamento de Arquitectura de Computadores y Automática, Curso 2024/2025El presente proyecto de investigación tiene como objetivo diseñar e implementar varios de los periféricos estudiados en la asignatura Sistemas Empotrados, perteneciente al itinerario de Ingeniería de Computadores, utilizando una tecnología diferente a la usada en esta. El desarrollo se llevará a cabo en una Matriz de Puertas Programables en Campo o FPGA (Field Programmable Gate Array) modelo Lattice iCE40HX, integrada en la placa de desarrollo Alhambra II. Esta placa, de origen español, forma parte de la familia IceZum Alhambra y se caracteriza por ser sencilla, económica y libre. Se usará una herramienta de desarrollo hardware, también libre: el programa IceStudio, basado en el proyecto Icestorm.
Ambos recursos difieren de los usados en la asignatura: la placa de prototipado Basys3, de la familia Artix™ 7, y el programa de diseño hardware Vivado de Xilinx. Estas herramientas son más pequeñas y simples, y permiten llevar a cabo desarrollos más ágiles y rápidos.
La descripción del hardware se realizará usando el lenguaje Verilog, compatible con IceStudio. Se implementará un softcore del procesador RISC-V, el PicoRV32, el cual soporta el conjunto de instrucciones o ISA (Instruction Set Architecture) RISC-V RV32IMC.This research project aims to redesign and implement several of the peripherals studied in the Embedded Systems course, part of the Computer Engineering program, using a different technology than the one used in the course.
The development will be carried out on a Lattice iCE40HX Field Programmable Gate Array (FPGA), integrated into the Alhambra II development board. This board, of Spanish origin, belongs to the IceZum Alhambra family and is characterized by being simple, economical, and free. A visual and user-friendly hardware development tool will be used: IceStudio, based on the Icestorm project.
A hardware development tool, also free, will be used. The IceStudio program, based on the Icestorm project. Both resources differ from those used in the course. The Basys3 FPGA from the Artix™ 7 family and the Vivado hardware design program from Xilinx. These tools are smaller and simpler, allowing for more agile and faster development.
The hardware will be described using the Verilog language, which is compatible with IceStudio. A RISC-V processor softcore, the PicoRV32, will be implemented, which implements the RISC-V RV32IMC instruction set architecture (ISA).Depto. de Arquitectura de Computadores y AutomáticaFac. de InformáticaTRUEunpu
Late Pleistocene temperature patterns in the Western Palearctic: insights from rodent associations compared with general circulation models
No full textSince rodent fossils are preserved in many low- and high-latitude archaeological and paleontological sites from a wide variety of environments, their associations are a commonly useful proxy for inferring past local climate and environmental conditions. Such a frequent and widespread geographic distribution can help us to better understand past climate evolution by providing access to high spatiotemporal resolution at large geographical scales. The aim of this paper is to develop an approach to generate continental-scale temperature maps based on rodent associations and to assess their reliability compared to state-of-the-art general circulation models (GCMs). We used the Bioclimatic Analysis, based on fossil and modern rodent associations, to infer climate zone distribution and local temperatures (mean annual temperature, mean temperature of the warmest month and mean temperature of the coldest month), at the Western Palearctic (Europe, Middle East and North Africa) for six different periods: the Last Glacial Maximum (LGM), Heinrich Stadial, Bølling, Allerød, Younger Dryas and present-day conditions. The Bioclimatic Analysis is combined with a spatial generalized linear mixed model to interpolate these surface temperatures across the Western Palearctic. We show that the spatial patterns in mean annual temperature and mean temperature of the warmest and coldest months are very similar between our interpolations and GCMs for both present-day and LGM conditions, but the rodent-based approach provides slightly cooler LGM estimations in western Europe and warmer ones in eastern Europe. Throughout the Late Glacial oscillations, the rodent-based model infers globally small variations in mean annual temperature and mean temperature of the warmest months and slightly larger changes in mean temperature of the coldest months. Nonetheless, some events show weak but significant regional variations depending of the events and the climate variable. For instance, the most important shifts in mean annual temperature between the Allerød and Younger Dryas are observed in northwestern regions. Northeastern regions, on the other hand, experienced relatively stable mean annual temperature, although they did experience considerable warming of the warmest month and cooling of the coldest month. Minor discrepancies appear between GCMs and the rodent-based model, the latter showing colder temperature in northwestern Europe and hence a differential west–east gradient in ice-sheet influence. Our results demonstrate that rodent associations are robust proxies for reconstructing and regionalizing past temperatures at broad scales, offering a readily reproducible approach to be reimplemented in future studies incorporating new rodent data.Ministerio de Ciencia e InnovaciónMinisterio de UniversidadesAlexander von Humboldt FoundationUniversidad Complutense de MadridDepto. de Geodinámica, Estratigrafía y PaleontologíaFac. de Ciencias GeológicasTRUEpu
Creating communities of urban care: the no to the felling environmental movement in the city of Madrid
No full textThe emergence of urban care communities has recently become a topic of study, with a focus on the social bonds shaped through mutual assistance and support in vulnerable and non‐vulnerable neighbourhoods following natural disasters, pandemic situations, and collective urban emotional suffering. We argue that not only is a more comprehensive conceptualisation of urban care necessary, incorporating urban green infrastructures as a component of collective wellbeing, but that care needs to be considered as a political element to develop urban resilience in the face of climate change and extreme events. With this in mind, the present research proposes the enlargement of the concept of the urban care community by means of a specific case study and using a qualitative methodology, underlining how the environmental urban care discourse strengthens new political subjects claiming for urban care‐full justice. Our case study is the No to the Felling movement, which emerged at the end of 2023 from the response of a group of residents to Madrid City Council’s plan to cut down trees located mainly in the Madrid Río park to extend a metro line.
The case is not only indicative of a growing concern about the preservation of green spaces in urban areas, but it is also related to the discourse of caring for the urban space. However, these demands did not arise from a vacuum. Their most direct antecedent was the emergence of networks of mutual support in the city that started during the pandemic, and already existing neighbourhood protest movements against urban planning processes. This article analyses how previous experiences of care generate conditions of possibility for current struggles and the constitution of a political subject that promotes environmental urban care through the shared perception of urban wellbeing deprivation and the absence of a caring approach to such issues.Agencia Estatal de Investigación, Ministerio de Ciencia Innovación y UniversidadesDepto. de Historia, Teorías y Geografías PolíticasFac. de Ciencias Políticas y SociologíaTRUEpu
La construcción autobiográfica de un profesional: Ambrosio de Salazar
No full textUniversidad de CórdobaEdiciones ComplutenseEdiciones ComplutenseTRUEpu