14 research outputs found
Enxeñaría de requisitos
Titulación: Grao en Enxeñaría Informática -- Materia: Enxeñaría do SoftwareNos temas anteriores estableceuse o software como un elemento de Enxeñaría e propuxéronse unha serie de normas e paradigmas que definen os procesos necesarios para a súa construción, o primeiro dos cales é a
análise do sistema e dos requisitos do software.
Nesta fase o obxectivo fundamental é definir de xeito inequívoco que problema estamos tratando de resolver.
A problemática que se xera é tal que, en realidade, o que acabamos de mencionar como un proceso, se divide en varios que mesmo se agrupan de forma separada debido á diferente natureza das actividades implicadas: Identificación de necesidades, comprensión e modelado, especificación, verificación e validación dos requisitos e xestión dos mesmos.
A importancia deste proceso pode apreciarse no controvertido Chaos Report que sinala, entre as 10 causas máis significativas de fracaso dos proxectos, 6 que están directamente relacionadas co traballo realizado nas actividades de análise.
A dificultade na realización deste proceso compréndese pola necesidade de obter a descrición dun elemento lóxico, o software xerado en contornas moi diversas, a partires da descrición en linguaxe natural, inherentemente ambigua, e procedente de distintos implicados cuxa cultura e formación lle fai que expresen ideas semellantes de forma moi distinta.
Para abordar esta problemática propóñense técnicas para a extracción da información e para representar o sistema a construír mediante modelos que permitan demostrar que se comprendeu correctamente a información
transmitida e que o sistema que representan é o que realmente se necesita construír.Universidade de Santiago de Compostela. Servizo de Normalización Lingüístic
Smart Environmental Data Infrastructures: Bridging the Gap between Earth Sciences and Citizens
The monitoring and forecasting of environmental conditions is a task to which much effort and resources are devoted by the scientific community and relevant authorities. Representative examples arise in meteorology, oceanography, and environmental engineering. As a consequence, high volumes of data are generated, which include data generated by earth observation systems and different kinds of models. Specific data models, formats, vocabularies and data access infrastructures have been developed and are currently being used by the scientific community. Due to this, discovering, accessing and analyzing environmental datasets requires very specific skills, which is an important barrier for their reuse in many other application domains. This paper reviews earth science data representation and access standards and technologies, and identifies the main challenges to overcome in order to enable their integration in semantic open data infrastructures. This would allow non-scientific information technology practitioners to devise new end-user solutions for citizen problems in new application domainsThis research was co-funded by (i) the TRAFAIR project (2017-EU-IA-0167), co-financed by the Connecting Europe Facility of the European Union, (ii) the RADAR-ON-RAIA project (0461_RADAR_ON_RAIA_1_E) co-financed by the European Regional Development Fund (ERDF) through the Iterreg V-A Spain-Portugal program (POCTEP) 2014-2020, and (iii) the Consellería de Educación, Universidade e Formación Profesional of the regional government of Galicia (Spain), through the support for research groups with growth potential (ED431B 2018/28)S
A tool for toponym recognition in medieval documents
Este artigo apresenta o método de construção duma ferramenta para a anotação de entidades geográficas mencionadas em textos medievais. A nova ferramenta foi desenvolvida a partir dos módulos de língua
contemporânea do LinguaKit, pacote multilingue de ferramentas de PLN. Uma coleção de corpora anotados manualmente serviu de recurso para elaborar uma lista de topónimos medievais (gazetteers) e
observar padrões para a melhora e implementação de novas regras de reconhecimento dos nomes de lugar. Depois da lista de entidades geográficas, os ativadores contextuais (triggers) foram o recurso determinante na melhora da abrangência. Para o produto final, fizeram-se também ajustes menores na procura de recolher os elementos mais comuns do léxico e os contextos gramaticais das entidades geográficas mencionadas. Ainda que muito trabalho fica por fazer na elaboração de listas para entidades não geográficas, na construção dum modelo de língua medieval e um lexicon específico, o novo módulo pode ser utilizado para anotar textos e mostra uma melhora significativa a respeito dos módulos previamente existentesThis paper describes a method to build a tool aimed at recognizing geographical named entities in medieval texts. The new tool has been developed using the corresponding modules for contemporary languages contained in LinguaKit, a suite of NLP tools. A collection of manually annotated corpora served as a resource to build a gazetteer of medieval toponyms and find patterns to improve and implement new rules for the recognition of place names. In addition to the gazetteer, a list of triggers was the most determinant factor to improve recall. Final adjustments considered the most frequent terms of the lexicon and grammatical contexts for geographical named entities. In the process of building a model of medieval language and a specific lexicon, the available tool can already be used to annotate texts and shows a significant improvement when compared with previous modules. However, most work remains to be done in terms of adding specific gazetteers for entities other than geographicalEste trabalho foi desenvolvido no marco da rede galega de investigacao TECANDALI, ED341DR2016/011, financiada pela Consellaría de Educación e Ordenación Universitaria da Xunta de Galicia, e do European Regional Development Fund (ERDF)S
La integración del conocimiento sobre la Cordillera Cantábrica: hacia un observatorio inter-autonómico del cambio global
Producción CientíficaLa Cordillera Cantábrica presenta una serie de singularidades que le convierten en un excelente enclave para el seguimiento de los efectos del cambio global. Este estudio analiza la necesidad de generar un observatorio inter-autonómico del cambio global, que permitiría integrar el conocimiento actual sobre estas montañas y determinar las prioridades en la generación de nuevo conocimiento. Para cumplir este objetivo, se presentan dos aproximaciones complementarias. La primera consiste en la revisión de la literatura científica publicada sobre la Cordillera Cantábrica y su comparación con otros enclaves geográficos de la Península Ibérica. La segunda consiste en la síntesis de información de un seminario titulado “La Cordillera Cantábrica como Centinela de los Efectos del Cambio Global”, celebrado en Santander en agosto de 2015. El análisis bibliográfico muestra que el número de publicaciones científicas sobre la Cordillera Cantábrica es similar al de otros enclaves geográficos de la Península Ibérica, pero con menor riqueza de disciplinas. La producción científica está dominada por los centros de investigación más próximos y tiene una alta participación internacional. Las conclusiones del seminario evidencian que este sistema es un candidato ideal para el seguimiento de los efectos del cambio global sobre multitud de elementos biofísicos. Se considera que la generación de un seminario permanente, junto con la consolidación de las redes de seguimiento actuales, la coordinación de nuevos trabajos, y la mejora de la comunicación entre administraciones y comunidad científico-técnica son elementos esenciales en la futura generación de un observatorio del cambio global en la Cordillera Cantábrica
Immunogenetic characterization of clonal plasma cells in systemic light-chain amyloidosis
This study was supported by the Centro de Investigación Biomédica en Red—Área de Oncología—del Instituto de Salud Carlos III (CIBERONC; CB16/12/00369; and CB16/12/00489), Instituto de Salud Carlos III/Subdirección General de Investigación Sanitaria (FIS No. PI13/02196), Asociación Española Contra el Cáncer (GCB120981SAN and the Accelerator Award), CRIS against Cancer foundation grant 2014/0120, and the Black Swan Research Initiative of the International Myeloma Foundation.Peer reviewe
Relationship of Weather Types on the Seasonal and Spatial Variability of Rainfall, Runoff, and Sediment Yield in the Western Mediterranean Basin
Rainfall is the key factor to understand soil erosion processes, mechanisms, and rates. Most research was conducted to determine rainfall characteristics and their relationship with soil erosion (erosivity) but there is little information about how atmospheric patterns control soil losses, and this is important to enable sustainable environmental planning and risk prevention. We investigated the temporal and spatial variability of the relationships of rainfall, runoff, and sediment yield with atmospheric patterns (weather types, WTs) in the western Mediterranean basin. For this purpose, we analyzed a large database of rainfall events collected between 1985 and 2015 in 46 experimental plots and catchments with the aim to: (i) evaluate seasonal differences in the contribution of rainfall, runoff, and sediment yield produced by the WTs; and (ii) to analyze the seasonal efficiency of the different WTs (relation frequency and magnitude) related to rainfall, runoff, and sediment yield. The results indicate two different temporal patterns: the first weather type exhibits (during the cold period: autumn and winter) westerly flows that produce the highest rainfall, runoff, and sediment yield values throughout the territory; the second weather type exhibits easterly flows that predominate during the warm period (spring and summer) and it is located on the Mediterranean coast of the Iberian Peninsula. However, the cyclonic situations present high frequency throughout the whole year with a large influence extended around the western Mediterranean basin. Contrary, the anticyclonic situations, despite of its high frequency, do not contribute significantly to the total rainfall, runoff, and sediment (showing the lowest efficiency) because of atmospheric stability that currently characterize this atmospheric pattern. Our approach helps to better understand the relationship of WTs on the seasonal and spatial variability of rainfall, runoff and sediment yield with a regional scale based on the large dataset and number of soil erosion experimental stations
Clonal chromosomal mosaicism and loss of chromosome Y in elderly men increase vulnerability for SARS-CoV-2
The pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2, COVID-19) had an estimated overall case fatality ratio of 1.38% (pre-vaccination), being 53% higher in males and increasing exponentially with age. Among 9578 individuals diagnosed with COVID-19 in the SCOURGE study, we found 133 cases (1.42%) with detectable clonal mosaicism for chromosome alterations (mCA) and 226 males (5.08%) with acquired loss of chromosome Y (LOY). Individuals with clonal mosaic events (mCA and/or LOY) showed a 54% increase in the risk of COVID-19 lethality. LOY is associated with transcriptomic biomarkers of immune dysfunction, pro-coagulation activity and cardiovascular risk. Interferon-induced genes involved in the initial immune response to SARS-CoV-2 are also down-regulated in LOY. Thus, mCA and LOY underlie at least part of the sex-biased severity and mortality of COVID-19 in aging patients. Given its potential therapeutic and prognostic relevance, evaluation of clonal mosaicism should be implemented as biomarker of COVID-19 severity in elderly people. Among 9578 individuals diagnosed with COVID-19 in the SCOURGE study, individuals with clonal mosaic events (clonal mosaicism for chromosome alterations and/or loss of chromosome Y) showed an increased risk of COVID-19 lethality
Comparación de los efectos hemodinámicos del levosimendán con la dobutamina en pacientes con bajo gasto después de cirugía cardiaca
Hemodynamic Effects of Levosimendan Compared With Dobutamine in Patients With Low Cardiac Output After Cardiac Surgery
Down syndrome as risk factor for respiratory syncytial virus hospitalization : A prospective multicenter epidemiological study
Respiratory syncytial virus (RSV) infection in childhood, particularly in premature infants, is associated with significant morbidity and mortality. To compare the hospitalization rates due to RSV infection and severity of disease between infants with and without Down syndrome (DS) born at term and without other associated risk factors for severe RSV infection. In a prospective multicentre epidemiological study, 93 infants were included in the DS cohort and 68 matched by sex and data of birth (±1 week) and were followed up to 1 year of age and during a complete RSV season. The hospitalization rate for all acute respiratory infection was significantly higher in the DS cohort than in the non-DS cohort (44.1% vs 7.7%, P<.0001). Hospitalizations due to RSV were significantly more frequent in the DH cohort than in the non-DS cohort (9.7% vs 1.5%, P=.03). RSV prophylaxis was recorded in 33 (35.5%) infants with DS. The rate of hospitalization according to presence or absence of RSV immunoprophylaxis was 3.0% vs 15%, respectively. Infants with DS showed a higher rate of hospitalization due to acute lower respiratory tract infection and RSV infection compared to non-DS infants. Including DS infants in recommendations for immunoprophylaxis of RSV disease should be considered