62 research outputs found
Tunable dual-band filters based on capacitive-loaded stepped-impedance resonators
This paper proposes the design of tunable dual-band
filters for multi-band multi-standard systems. The main
objective is to provide frequency tunability in the second band
while maintaining the first band fixed. To this end, the
capacitive-loaded stepped-impedance resonator is used. The
work is divided into two main parts. In the first part, a deep
analysis of the capacitive-loaded stepped-impedance resonator
structure is done, which provides analytical closed-form design
equations which eases their design in front of the several
approaches available in the literature up to now. The analysis is
also particularized for the case of the capacitive-loaded uniform
resonator. In the second part, resonators are integrated in two
dual-band tunable filters.Postprint (published version
Masculine, feminine and neutral sports: Extracurricular sport modalities in practice
The present work constitutes a novel approach to extracurricular sport modalities. The aim was to analyze the participation model and to determine the relevance of sex in this context. Data from 616 students, aged 15 to 17, were collected. The questionnaire on sport lifestyle from a gender perspective (Alvariñas-Villaverde et al., 2009) was used for assessment. The results showed that sport choice corresponds to sports traditionally associated with men or women. Nevertheless, these coexist with other neutral sports. Girls’ practice was more diverse, while boys’ profile was more resistant to changing classic patterns. Specific strategies are needed to make boys become more interested in typically female activities
The Emissivity Of Foam-Covered Water Surface At L-Band: Theoretical Modeling And Experimental Results From The FROG 2003 Field Experiment
Sea surface salinity can be measured by microwave radiometry at L-band (1400-1427 MHz). This frequency is a compromise between sensitivity to the salinity, small atmospheric perturbation, and reasonable pixel resolution. The description of the ocean emission depends on two main factors: (1) the sea water permittivity, which is a function of salinity, temperature, and frequency, and (2) the sea surface state, which depends on the wind-induced wave spectrum, swell, and rain-induced roughness spectrum, and by the foam coverage and its emissivity. This study presents a simplified two-layer emission model for foam-covered water and the results of a controlled experiment to measure the foam emissivity as a function of salinity, foam thickness, incidence angle, and polarization. Experimental results are presented, and then compared to the two-layer foam emission model with the measured foam parameters used as input model parameters. At 37 psu salt water the foam-induced emissivity increase is /spl sim/0.007 per millimeter of foam thickness (extrapolated to nadir), increasing with increasing incidence angles at vertical polarization, and decreasing with increasing incidence angles at horizontal polarization.Peer Reviewe
The emissivity of foam-covered water surface at L-band: theoretical modeling and experimental results from the FROG 2003 field experiment
Sea surface salinity can be measured by microwave
radiometry at L-band (1400–1427 MHz). This frequency is a
compromise between sensitivity to the salinity, small atmospheric
perturbation, and reasonable pixel resolution. The description
of the ocean emission depends on two main factors: 1) the sea
water permittivity, which is a function of salinity, temperature,
and frequency, and 2) the sea surface state, which depends on the
wind-induced wave spectrum, swell, and rain-induced roughness
spectrum, and by the foam coverage and its emissivity. This study
presents a simplified two-layer emission model for foam-covered
water and the results of a controlled experiment to measure the
foam emissivity as a function of salinity, foam thickness, incidence
angle, and polarization. Experimental results are presented, and
then compared to the two-layer foam emission model with the
measured foam parameters used as input model parameters. At
37 psu salt water the foam-induced emissivity increase is 0.007
per millimeter of foam thickness (extrapolated to nadir), increasing
with increasing incidence angles at vertical polarization,
and decreasing withPostprint (published version
Genome sequencing and oenologically relevant traits of the Uruguayan native yeast Issatchenkia terricola
Issatchenkia terricola 0621 is a non-Saccharomyces yeast strain isolated from Tannat grapes from Uruguayan vineyards; it stands out for its ability to produce high levels of β-glucosidase activity, which contributes to the aromatic complexity of wines. To delve into the potential oenological applications of this strain, its high-quality genome was obtained and explored, allowing the main central carbon and nitrogen metabolic pathways to be reconstructed. I. terricola is able to utilise glycerol as the sole carbon source in a way that has not previously been described for yeasts. The genes of the fermentome and those involved in stress resistance during winemaking were also identified, and differences were found when compared to S. cerevisiae, which may explain why I. terricola is unable to complete fermentation. The pathways responsible for natural aroma synthesis were also reconstructed, and the production of aromatic acids, alcohols, esters, acetates and lactones was verified experimentally. Finally, sequences encoding for β-glucosidases, in addition to the previously characterised one, were identified in the genome. The work presented here lays the groundwork for experimental research focused on the dissection of the metabolism of a native non-Saccharomyces strain and its application for oenological and biotechnological purposes.ANII: FMV_1_2017_1_13657
Professional rural women: their evaluation of rural areas in Catalonia and Galicia
Dentro del contexto de las nuevas ruralidades algunas mujeres profesionales han decidido quedarse
en el mundo rural para desarrollar su propio proyecto profesional y vital. Es un fenĂłmeno nuevo dado el
proceso constante de emigración rural hacia las ciudades que España ha sufrido en el pasado. La investigación
la hemos llevado a cabo en zonas rurales de Cataluña y Galicia a través de entrevistas en profundidad.
Nuestro objetivo es captar cómo estas mujeres profesionales perciben no solo el mundo rural sino también a
las mujeres rurales actuales. Su percepciĂłn, fruto de un proceso de formaciĂłn y experiencia de vida en otros
lugares, urbanos, se puede convertir en un espejo para las generaciones más jóvenes de mujeresWithin the context of the new ruralities reshaped by globalization processes some educated
women decide to stay at the countryside where they develop their own life project. It is a relatively new
phenomenon taking into account the steady process of female migration from rural areas that has taken
place in Spain for decades. Through in-depth interviews we attempt to set out how rural women perceive
themselves and assess rurality nowadays in rural areas of two Spanish regions, Catalonia and Galicia.
Women’s critical perceptions of the new ruralities, created by a process of education and urban life experiences,
may become a mirror for younger (female) generationsEsta investigaciĂłn forma parte de un proyecto más amplio sobre Mujeres, trabajo y ruralidad: estrategias innovadoras para el desarrollo de un proyecto profesional y personal (Ref. 2011 a 0004-INV-00024), financiado por el Instituto de la Mujer, Ministerio de Sanidad, PolĂtica Social e Igualdad del Gobierno de EspañaS
Sea surface emissivity observations at L-band: first results of the Wind and Salinity Experiment WISE 2000
Sea surface salinity can be measured by passive microwave remote sensing at L-band. In May 1999, the European Space Agency (ESA) selected the Soil Moisture and Ocean Salinity (SMOS) Earth Explorer Opportunity Mission to provide global coverage of soil moisture and ocean salinity. To determine the effect of wind on the sea surface emissivity, ESA sponsored the Wind and Salinity Experiment (WISE 2000). This paper describes the field campaign, the measurements acquired with emphasis in the radiometric measurements at L-band, their comparison with numerical models, and the implications for the remote sensing of sea salinity.Peer ReviewedPostprint (published version
Genre et innovation dans les nouveaux processus de re-ruralisation en Espagne
En la Ăşltima dĂ©cada se ha observado en algunas zonas con buenas infraestructuras de comunicaciĂłn y prĂłximas a nĂşcleos urbanos de España, un retorno de mujeres y hombres adultos jĂłvenes que se instalan en este medio para desarrollar proyectos profesionales propios. Este proceso de cambio en las comunidades rurales no es exclusivo de España sino que tambiĂ©n se observa en Europa. Este artĂculo examina quiĂ©n hay detrás de los nuevos procesos de re-ruralizaciĂłn en España a partir del análisis de proyectos profesionales llevados a cabo por hombres y mujeres adultos jĂłvenes, formados y con experiencia urbana. Estos agentes no son neutros en cuanto al gĂ©nero, con lo cual se toma esta categorĂa analĂtica para examinar las relaciones de poder que subyacen en estos procesos atendiendo a los objetivos, oportunidades y dificultades que tienen unos y otras en el origen de sus proyectos. La investigaciĂłn se ha realizado a travĂ©s de entrevistas en profundidad para poder conocer cĂłmo las personas dan sentido a sus propias experiencias. Los resultados confirman la existencia de procesos de re-ruralizaciĂłn marcados por iniciativas innovadoras y muy profesionalizadas desarrolladas por mujeres y hombres cuyos discursos revelan nuevas formas de desigualdad y distintos mecanismos de poder.Na Ăşltima dĂ©cada tem-se observado em algumas áreas rurais com boas infraestruturas de comunicação e prĂłximas dos nĂşcleos urbanos de Espanha, um retorno de mulheres e homens adultos jovens e que se estabelecem neste espaço para desenvolver projetos profissionais prĂłprios. Este processo de mudança nas comunidades rurais nĂŁo Ă© exclusivo de Espanha, mas tambĂ©m Ă© observado em outras partes da Europa. Este artigo analisa quem está por trás dos novos processos de re-ruralização em Espanha a partir da análise de projetos profissionais realizados por homens e mulheres adultos/as jovens. Estes agentes nĂŁo sĂŁo neutros em termos de g Ă©nero, pelo que esta categoria analĂtica Ă© usada para examinar as relações de poder subjacentes a estes processos atendendo Ă s metas, oportunidades e dificuldades encontradas por uns e outras, e a origem dos seus projetos. A pesquisa foi realizada atravĂ©s de entrevistas realizadas em profundidade para conhecer como as pessoas dĂŁo sentido Ă s suas prĂłprias experiĂŞncias. Os resultados confirmam a existĂŞncia de processos de re-ruralização marcadas por iniciativas inovadoras e altamente profissionalizadas desenvolvidas por mulheres e homens cujos discursos revelam novas formas de desigualdade e mecanismos de poder distintos.In the last decade it has been observed in some areas with good communication infrastructures and close to urban centers in Spain, a return of young adult men and women who settle in to develop their own professional projects. This process of change in rural communities is not exclusive to Spain but is also observed in other rural areas of Europe. This article examines who is behind the new processes of re-ruralization in Spain from the analysis of professional projects carried out by young adult educated men and women, with urban experience. These agents are not gender neutral, so this analytical category is taken to examine the power relations that underlie these processes, taking into account the objectives, opportunities and difficulties that each one has at the origin of their projects. The research has been conducted through in-depth interviews, in order to ascertain how people give expression to their own experiences. The results confirm the existence of re-ruralization processes distinguished by innovative and highly professionalized initiatives developed by women and men whose discourse reveals new forms of inequality and different power mechanisms.Au cours de la dernière dĂ©cennie, on a observĂ©, dans certaines zones dotĂ©es de bonnes infrastructures de communication et Ă proximitĂ© des centres urbains d'Espagne des jeunes hommes et femmes adultes sont de retour et s’installent dans ce milieu pour dĂ©velopper leurs propres projets professionnels. Ce processus de changement dans les communautĂ©s rurales n'est pas exclusif de l'Espagne, Ă©tant Ă©galement observĂ© en Europe. Cet article examine ce qui est Ă l’origine des nouveaux processus de re-ruralisation en Espagne Ă partir de l’analyse des projets professionnels menĂ©s par de jeunes adultes, hommes et femmes, formĂ©s et ayant une expĂ© rience de vie urbaine. On utilise la catĂ©gorie analytique du genre pour examiner les relations du pouvoir qui soutiennent les processus de re-ruralisation a partir des objectifs, les opportunitĂ©s et les difficultĂ©s que chacun ait Ă l ’origine de leurs projects. La recherche a Ă©tĂ© menĂ©e Ă travers des entretiens approfondis pour apprendre comment les gens donnent un sens Ă leurs propres expĂ©riences. Les rĂ©sultats confirment l’ existence de processus de re-ruralisation marquĂ©s par des initiatives novatrices et hautement professionnalisĂ©es dĂ©veloppĂ©es par des femmes et des hommes dont les discours rĂ©vèlent de nouvelles formes d’inĂ© galitĂ© et des mĂ©canismes de pouvoir diffĂ©rents.Esta investigaciĂłn forma parte de un proyecto más amplio de las investigadoras sobre
GeografĂas del gĂ©nero, trabajo y ruralidad: Nuevas feminidades y masculinidades para un desarrollo rural sostenible (CSO2015-63913-R), financiado por el Ministerio de EconomĂa y Competitividad, Gobierno de EspañaS
- …