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The quest for information retrieval on the semantic web
Semantic search has been one of the motivations of the Semantic Web since it was envisioned. We propose a model for the exploitation of ontology-based KBs to improve search over large document repositories. The retrieval model is based on an adaptation of the classic vector-space model, including an annotation weighting algorithm, and a ranking algorithm. Semantic search is combined with keyword-based search to achieve tolerance to KB incompleteness. Our proposal has been tested on corpora of significant size, showing promising results with respect to keyword-based search, and providing ground for further analysis and research
Un método sencillo para la estimación de la porosidad de un agregado de suelo
4 Pags.- 2 Figs. Trabajo originalmente presentado en las XII Jornadas de Investigación en la Zona No Saturada del Suelo (Alcalá de Henares, 18-20 de nov. de 2015). © de los textos: sus autores[ES] Este trabajo presenta un nuevo método (AM)
para estimar la porosidad de agregados de suelo, ,
expresada como el cociente entre el volumen interno de
poros (Vi) y el volumen externo del agregado (VT). VT se
calcula a partir de la densidad de partícula, el peso del
agregado y el Vi, estimado este último a partir del peso del
agregado saturado en alcohol. El método se validó
comparando VT por AM con el VT medido por fotogrametría
(PHM), sobre 36 agregados de 8-16 mm procedentes de un
suelo bajo laboreo tradicional (CT), reducido (RT) y no
laboreo (NT). Los resultados muestran una buena relación
entre el VT medido con PHM y AM (y = 0,94 x + 0,01; R2 =
0,99). El método fue suficientemente sensible para detectar
diferencias entre los sistemas de laboreo. Los agregados de
suelo bajo NT y RT presentaron una significativamente
mayor que bajo CT.[EN] This work presents a new method (AM) to
estimate the soil aggregate porosity, , expressed as the
quotient between the internal pore volume (Vi) and the
aggregate volume (VT). VT is calculated from the particle
soil density, and the aggregate weight and Vi, the last one
estimated form the weight of the ethanol-saturated agregate.
The method was validated by comparing the VT estimated
with AM with the corresponding value estimated by the
photogrammetry technique (PHM), on 36 aggregates of 8-
16 mm size collected from conventional tillage (CT),
reduced tillage (RT) and no tillage (NT). Results show a
good relationship between VT measured with PHM and with
AM (y = 0.94 x + 0.01, R2 = 0.99). The values were
significantly higher in soil aggregates under NT and RT
than those under CT.Este trabajo ha sido financiado por el Ministerio de Economía y Competitividad de España (AGL2010-22050-C03-02).Peer reviewe
Environmental niche and global potential distribution of the giant resin bee Megachile sculpturalis, a rapidly spreading invasive pollinator
Abstract Since alien species may threaten native ecosystems when becoming invasive, one of the main challenges is try to predict their potential spread. Despite bees are essential pollinators and provide important ecosystem services in their native areas, outside these areas they could represent a risk for the local bee fauna, e.g. by competing for resources or by transmitting pathogens, as it was observed for species of Megachile, the bee genus with the highest number of recorded alien species. Here, using two complementary methods (Multidimensional Envelope procedure (MDE) and the Maximum Entropy algorithm (MaxEnt)), we aim to explore environmental niche as well as to identify potential worldwide distribution of the giant resin bee Megachile sculpturalis, native to Asia and recently introduced in North America and Europe. The two methodological approaches predict an important expansion for the species and reveal a preference for areas of Palearctic and Nearctic regions with reduced temperature fluctuations and moderate precipitation regimes. The Southern hemisphere seems not having good conditions for this species. Estimations for the future (2070) predict a further, though limited expansion to northern areas in the North hemisphere. However, during roughly 25 years of spreading outside its native range, M. sculpturalis clearly expanded the range of inhabitable environmental conditions, which may increase its potential invasiveness in a pattern difficult to predict using only correlative methods. Physiological and ecological data are necessary to better assess the potential niche of this bee species and in consequence to better predict its future spreading dynamics
Didactic transposition of wetlands research
Se plantea una propuesta de transposición didáctica al aula con las investigaciones realizadas sobre humedales y el papel de los medios de comunicación como elementos clave. La metodología empleada se basa en la creación de una comunidad de aprendizaje donde se fomente la comunicación y se produzca un aprendizaje significativo en entornos naturales. Para ello se utilizan los medios de comunicación frecuentados por los alumnos como fuente de información motivadora, especialmente las redes sociales. La importancia de utilizar los conocimientos científicos en la docencia resulta especialmente interesante en la redefinición de la figura del maestro docente investigador de las Facultades de Educación. El objetivo final de la propuesta es hacer más eficiente el trinomio investigación-enseñanza-aprendizaje, educando a personas competentes que contribuyan a la mejora del entorno en que se desenvuelven.This article is a proposal of didactic transposition into the classroom of the investigations conducted on wetlands and the role of the media as key elements. The methodology used is based on the creation of a learning community, where encouraging communication and meaningful learning occurs in natural environments. Frequented by students as a motivating information source, media like social networks are especially used. The importance of using scientific knowledge in teaching is especially interesting in the redefinition of the figure of new researcher teacher in faculties of education. The final objective of the proposal is to make more efficient the trinomial researching-teaching-learning, educating competent people that contribute to the improvement of the environment in which they develop
Relationships between Sprint Ability and Endurance Capacity in Soccer Referees
[EN] The aim of this study was to analyze the association between sprint ability and endurance
capacity in soccer referees. Twenty-three Spanish officials participated in this study. Each referee
undertook, in this order, a 40 m linear straight sprinting test (40 m Sprint) and the Yo–Yo intermittent
recovery level 1 test (YYIR1) interspersed with a 8 min of self-administered rest. The results in the 40m
Sprint test showed that the time spent by referees was 5.56 0.27 s and achieved a maximum velocity
of 31.46 2.85 km h1. Furthermore, during the YYIR1 the referees covered 1213.91 432.26 m.
The distance covered at YYIR1 was moderately correlated to the velocity achieved in the 40 m Sprint
test (r = 0.404, p < 0.05). These results suggest that the ability to reach high speeds is a limiting
factor in YYIR1 performance.S
Exposición de una cabeza humana a radiofrecuencia
En esta contribución, un plano coronal de cabeza humana es expuesto a 125 mW de potencia radiada por un dipolo de media onda a 1800 MHz. Se proporcionan tanto la TAE (Tasa de Absorción Específica) como los incrementos de temperatura asociados a la exposición electromagnética, para distintos escenarios. Se evalúa el efecto en el confort térmico de los procesos termorregulatorios humanos. Se presenta un importante efecto de adaptación entre el dipolo y la cabeza humana, así como al cráneo como protector del encéfalo ante tensiones térmicas debidas a exposición a campo EM. Como resultado del estudio, se podrían derivar restricciones básicas más precisas combinando los límites de TAE con la respuesta térmica asociada.Esta investigación ha sido financiada parcialmente por la Fundación Séneca, Agencia de Ciencia y Tecnología de la Región de Murcia, a través de una ayuda del Programa Séneca
Probing Tyrosine Nitration with a Small TbIII-Metallopeptide
Financiado para publicación en acceso aberto: Universidade da Coruña/CISUG[Abstract] Tyrosine nitration, a post-translational modification (PTM) that takes place under nitrosative stress conditions, occurs through a non-enzymatic peroxynitrite-mediated reaction. Although protein nitration has long been considered an irreversible PTM involved in nitrosative stress-associated diseases, it has also been suggested to be a regulatory mechanism of signal transduction. Therefore, the development of tools that help to understand this protein modification is of great interest. Herein, we explore a TbIII-chelating metallopeptide to monitor tyrosine nitration. The luminescence of this probe decreases significantly between its non-nitrated and nitrated states, and this reduction in the luminescence intensity is directly related to the degree of tyrosine nitration after treatment with peroxynitrite. Remarkably, the luminescence intensity changes after nitration are not affected in the presence of complex biological media, which makes it a promising tool for understanding this protein modification.We are thankful for the funding received from the MCIN/AEI/10.13039/501100011033 and ERDF A way of making Europe (CTQ2017-89166-R and PID2019-104626GBI00), the Consellería de Cultura, Educación e Universidade, Xunta de Galicia (ED431C 2018/39, ED431B 2020/52, ED431 C 2022/39, and 508/2020), and the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement no. 851179). R.S.F. thanks the Consellería de Cultura, Educación e Universidade, Xunta de Galicia for her PhD fellowship (ED481A-2020/008). E.P. thanks the MCIN/AEI/10.13039/501100011033 and ESF Investing in your future for her Ramón y Cajal contract (RYC2019-027199-I). Funding for open access charge: Universidade da Coruña/CISUGXunta de Galicia; ED431C 2018/39Xunta de Galicia; ED431B 2020/52Xunta de Galicia; ED431C 2022/39Xunta de Galicia; ED481A-2020/00
A Highly Available Cluster of Web Servers with Increased Storage Capacity
Ponencias de las Decimoséptimas Jornadas de Paralelismo de la Universidad de Castilla-La Mancha celebradas el 18,19 y 20 de septiembre de 2006 en AlbaceteWeb servers scalability has been traditionally solved by improving software elements or increasing hardware resources of the server machine.
Another approach has been the usage of distributed
architectures. In such architectures, usually, file al-
location strategy has been either full replication or full distribution. In previous works we have showed that partial replication offers a good balance between storage capacity and reliability. It offers much higher
storage capacity while reliability may be kept at an equivalent level of that from fully replicated solutions.
In this paper we present the architectural details of Web cluster solutions adapted to partial replication.
We also show that partial replication does not imply a penalty in performance over classical fully replicated architectures. For evaluation purposes we have used a simulation model under the OMNeT++ framework and we use mean service time as a performance comparison metric.Publicad
La moda sostenible, un nicho emergente dentro del sector textil
El sector de la moda está sufriendo un cambio, consecuencia del mayor nivel de concienciación que hay respecto a los daños que produce al planeta la industria textil, que se sitúa como la segunda industria más contaminante del mundo. El modelo fast fashion que estaba empezando a predominar en el sector está dejando paso a un nuevo modelo basado en la disminución del impacto ecológico y social de su proceso de producción, conocido como slow fashion o moda sostenible. En el siguiente trabajo analizaremos la situación actual de dicho sector y el papel que cumple la comunicación dentro del slow fashion en general y de las marcas de moda sostenible en particular. Con el fin de conocer hasta qué punto están influyendo las campañas de comunicación en el crecimiento de este nuevo modelo, y hacia qué orientan las campañas las diferentes marcas de moda sostenible
Palabras clave: sostenibilidad, slow fashion, comunicación sostenible, sector, moda, impacto, industria textil, campañas de moda sostenible.Departamento de Historia Moderna, Contemporánea y de América, Periodismo y Comunicación Audiovisual y PublicidadGrado en Publicidad y Relaciones Pública
Evolution of the Black Death in the Crown of Castilla: new data for historical reconstruction
Sobre estas páginas, el lector se hará eco de las complejas similitudes que existieron entre las epidemias del pasado, particularmente del medievo, y la vigente pandemia mundial; así como de las actuaciones preventivas que las urbes castellanas llevaron a cabo para contenerlas. Este artículo se aproxima a ofrecer una visión completa del fenómeno histórico de la Peste Negra, analizando la cronología epidémica de la enfermedad en la Corona de Castilla, en sus diferentes ámbitos de desarrollo, durante los siglos bajomedievales. El alcance actual de la investigación, limitado a la segunda mitad del siglo XIV, se complementa con la evidencia de nuevos brotes pestilentes testimoniados en la última centuria medieval, un estudio novedoso favorecido por los procesos de digitalización documental.On these pages, the reader will become aware of the complex similarities that existed between the epidemics of the past, particularly in the Middle Ages, and the current global Pandemic; as well as the preventive actions that the Castilian cities carried out to stem them. This article offers a complete picture of the Crown of Castilla, in its different areas of development, during the late medieval centuries. The current scope of the research, which is limited to the second half of the 14th century, is supplemented by the evidence of new pestilential outbreaks in the last medieval century, an innovative study facilitated by the processes of documentary digitization
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