Beneficios percibidos de las lesiones deportivas : estudio cualitativo en futbolistas profesionales y semiprofesionales

El objetivo del estudio fue identificar y analizar los beneficios percibidos asociados a la lesión deportiva, en 16 futbolistas profesionales y semiprofesionales que se habían lesionado durante su práctica deportiva. Para la recogida de datos se realizaron entrevistas semiestructuradas, siendo el análisis de contenido efectuado través del software QSR Nvivo 2.0. Los participantes reportaron 31 beneficios percibidos en todo su proceso de lesión, siendo el apoyo social y la educación deportiva los más referidos. Las conclusiones apuntan para la importancia de incluir aspectos positivos para una comprensión más clara y completa del impacto global de las lesiones deportivas.The aim of the study was to identify and analyze the perceived benefits associated with sports injury in 16 professional and semi-professional players who were injured during sports practice. For data collection semi-structured interviews were conducted, content analyses being performed through the QSR Nvivo 2.0 software. 31 participants reported perceived benefits throughout the injury process, with social support and sports education referrals. The findings point to the importance of including positive aspects for a clearer and more complete understanding of the overall impact of sports injuries.O objectivo do estudo foi identificar e analisar os benefícios percebidos associados à lesão desportiva em 16 jogadores profissionais e semiprofissionais que se lesionaram durante a prática desportiva. Para a recolha de dados foram realizadas entrevistas semi-estruturadas, sendo a análise de conteúdo efectuada através do software QSR Nvivo 2.0. Os participantes reportaram 31 benefícios percebidos durante todo o processo de lesão, sendo o suporte social e a educação desportiva os mais referidos. As conclusões apontam para a importância de incluir aspectos positivos para uma compreensão mais clara e mais completa do impacto global das lesões desportivas

Avaliação do transporte sedimentar no estuário do rio Douro em diferentes cenários hidrodinâmicos

A bacia hidrográfica do rio Douro é a mais importante fonte sedimentar fluvial na costa NW Portuguesa. Durante as últimas décadas, verificou-se uma diminuição significativa de sedimentos principalmente devido à alteração das descargas fluviais, provocadas pela construção de barragens. O estuário superior é estreito e tem uma profundidade normalmente superior a 10 m. No estuário inferior a largura aumenta e a profundidade diminui, só ultrapassando os 10 m excecionalmente no canal principal, o qual permanece confinado à margem norte. Na embocadura, está localizado o banco de areia do Cabedelo disposto perpendicularmente ao eixo do estuário, confinando o escoamento ao canal estreito junto à margem norte. O Cabedelo é um banco arenoso sendo a sua forma modulada pelo regime de agitação e pelo escoamento fluvial e pela maré. Em situações de cheia, para caudais da ordem dos 10000 m3/s o banco era galgado e destruído pelo escoamento, sendo reconstruído progressivamente pelo escoamento depois de terminada a cheia. Te m - se constatado que ao longo do tempo o banco de areia tem migrado para montante no estuário. Foi construído um modelo tridimensional morfodinâmico do estuário com o programa Delft3D, constituído por 12267 células de cálculo por camada, tendo - se utilizado dez camadas na discretização vertical. Apresentam-se os resultados para a dinâmica sedimentar em função das condicionantes hidrodinâmicas como o caudal fluvial e a amplitude da maré. A descarga fluvial apresenta-se como fator chave para a exportação de sedimentos para a plataforma costeira, sendo que nos cenários de cheia a morfologia do estuário é completamente modificada. Os resultados obtidos são naturalmente condicionados pelas características dimensionais dos sedimentos transportad

Spectrophotometric characterization of simple glazings for a modular façade

A large variety of transparent materials is available for uses in buildings façades and all glazing properties must be considered in their choice. Such a selection should be a careful process of evaluation and weighing of tradeoffs. The correct glazing specifications for façades can reduce energy consumption in buildings, because the heat exchange and passage of radiation into the building as light and heat occur through transparent surfaces. Therefore, glazing significantly contributes to the heat transfer between outdoor and indoor spaces, which act directly on daylighting and thermal comfort. This manuscript addresses a spectrophotometric characterization of glazings for the study of components for the design of a modular façade system based on the climate of Portugal. The study focused on results of spectrophotometric measurements of an optical behavior in different solar spectrum intervals (ultraviolet, visible and near infrared), specifically the transmittance of some types of simple glazings. The results show the percentage of transmission to spectrum intervals, which enabled the analysis (OK?) of the efficiency of the glazing regarding daylighting and correlation to the thermal performance. Indications for specifications and adequate uses based on transmission of transparent surfaces have been obtained and complemented the datasheets available from the manufactures.The authors gratefully acknowledge the financial support provided by Erasmus Mundus ISAC – Improving Skills Across Continents for this research.info:eu-repo/semantics/publishedVersio

Application of flow cytometry for the identification of Staphylococcus epidermidis by peptide nucleic acid fluorescence in situ hybridization (PNA FISH) in blood samples

Staphylococcus epidermidis is considered to be one of the most common causes of nosocomial bloodstream infections, particularly in immune-compromised individuals. Here, we report the development and application of a novel peptide nucleic acid probe for the specific detection of S. epidermidis by fluorescence in situ hybridization. The theoretical estimates of probe matching specificity and sensitivity were 89 and 87%, respectively. More importantly, the probe was shown not to hybridize with closely related species such as Staphylococcus aureus. The method was subsequently successfully adapted for the detection of S. epidermidis in mixed-species blood cultures both by microscopy and flow cytometry.This work was supported by the Portuguese Institute Fundacao para a Ciencia e Tecnologia (PhD Fellowship SFRH/BD/29297/2006 and Post-Doc Fellowship SFRH/BPD/42208/2007)

Free profinite R-trivial, locally idempotent and locally commutative semigroups

This paper is concerned with the structure of implicit operations on R intersection with LJ1, the pseudovariety of all R-trivial, locally idempotent and locally commutative semigroups. We give a unique factorization statement, in terms of component projections and idempotent elements, for the implicit operations on R intersection with LJ1. As an application we give a combinatorial description of the languages that are both R-trivial and locally testable. A similar study is conducted for the pseudovariety DA intersection with LJ1 of locally idempotent and locally commutative semigroups in which each regular D-class is a rectangular band.INVOTAN, grant 4/ A/94/PO.PRC-GdR AM

Multi-syringe flow injection system for the determination of available phosphorus in soil samples

Considering the importance of monitoring the levels of nutrients present in soils and their availability to plants, an automatic methodology is proposed based on multi-syringe flow injection analysis (MSFIA) for the spectrophotometric determination of available phosphorus in soil extracts. This fully computerized flow technique allowed the development of a flow network where sample and reagents were intercalated and sent further towards the detection system. The colorimetric determination was based on the molybdenum blue method with ascorbic acid as reducing reagent and the Egner–Riehm method was applied to extract phosphorus from soil samples. A linear calibration curve was obtained between 0.75 and 15.0mgL-1. A determination frequency of 15 h-1 was achieved, with good repeatability for 12 consecutive injections of soil extracts (RSD<1.7%). The results obtained from 12 soil samples were statistically comparable to those attained by the usual batch method

Multi-syringe flow injection system with in-line microwave digestion for the determination of phosphorus

A multi-syringe system for spectrophotometric determination of total phosphorus involving in-line digestion is proposed. Sample and digestion solution were dispensed and directed towards a digestion vessel located inside a domestic microwave oven (MWO) where sample digestion took place. Afterwards, the digested sample was merged with the necessary reagents for the colorimetric determination based on the molybdenum blue method. Several digestion conditions were studied regarding composition of digestion solution, digestion time and power set on theMWO. The system was applied to waste water samples and results shown a good agreement with the reference method. Repeatable results (R.S.D. < 2.41%) and determination frequency of 12 h−1 were obtained.info:eu-repo/semantics/acceptedVersio

Engineering arbitrary motional ionic state through realistic intensity-fluctuating laser pulses

We present a reliable scheme for engineering arbitrary motional ionic states through an adaptation of the projection synthesis technique for trapped-ion phenomena. Starting from a prepared coherent motional state, the Wigner function of the desired state is thus sculpted from a Gaussian distribution. The engineering process has also been developed to take into account the errors arising from intensity fluctuations in the exciting-laser pulses required for manipulating the electronic and vibrational states of the trapped ion. To this end, a recently developed phenomenological-operator approach that allows for the influence of noise will be applied. This approach furnishes a straightforward technique to estimate the fidelity of the prepared state in the presence of errors, precluding the usual extensive ab initio calculations. The results obtained here by the phenomenological approach, to account for the effects of noise in our engineering scheme, can be directly applied to any other process involving trapped-ion phenomena.Comment: more information at http://www.df.ufscar.br/~quantum

Sample introduction in multi-syringe flow injection systems: comparison between time-based and volume-based strategies

In multi-syringe flowinjection analysis (MSFIA), devices as selection, injection or commutation valves must be incorporated to the manifold to provide access to sample and standard solutions. Therefore, the definition of sample amount can be either volume or time-based. In the present work, four configurations for sample introduction (two for each approach) were tested in order to establish if the different strategies affect the analytical signal in MSFIA systems. The mean absorbance value from ten consecutive injections of a bromothymol blue solution obtained for the time-based strategy was lower than that provided by the volume-based approach as the exact volume delivered by each configuration was different from the “theoretical” volume. For time-based configurations, the exact volume delivered is 2–5% lower than the theoretical value while for volume-based configurations, the volume delivered was between 6 and 46% larger than the theoretical volume. Moreover, for time-based sampling, the order of steps in the analytical cycle was of utmost importance since any alteration in the flow direction affected the volume delivered in the subsequent step in the analytical cycle. The influence of the two sampling approaches was also evaluated in the MSFIA systems for the spectrophotometric determination of phenolic compounds and the potentiometric determination of chloride. There was no evidence that the use of either volume or time-based sampling would improve the analytical features of these determinations when real samples were tested.info:eu-repo/semantics/acceptedVersio