Browsing by Issue Date, starting with "2017-07-31"
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- Screening and assessment of risk of falling: basis for exercise prescriptionPublication . Vaz, Sílvia Leontina Rosa; Martins, Anabela Correia; Murawa, MikeIntroduction: Falls are currently considered one of the most common and serious public health problems (Gschwind et al 2013). Faced with this problem, it becomes necessary to explore which factors can better predict the risk of falls in individuals living in the community, so that, preventive measures can be considered. Objectives: To identify fall risk indicators and to relate them to exercise prescription levels; to relate the history of fall, the functional capacity (measured through the Timed Up & Go, 10-meter walking speed test, Step test) and the fall risk factors and propose a guide based on those relations to address exercise prescription. Material and Methods: Descriptive and exploratory study. Two hundred community dwelling adults aged 55 or older were assessed, integrating two sub-samples, a Portuguese and a Polish. Study participants were assessed for socio-demographic data, history of falls, fear of falling, exercise, sedentary lifestyle, hearing problems and/or dizziness, visual problems, alcohol consumption, exercise self-efficacy and confidence in activities of the daily life (FES-Portuguese version). They were also subjected to three functional tests, golden measures in the assessment of fall risk, Timed Up and Go (TUG), 10-meter walking speed test and Step Test (15s).The statistical design included descriptive analyses, inferential analyses (bivariate: t-test for independent samples, One-Way ANOVA and Pearson’s correlation coefficient. Results: The percentage of fall in the population was 39.5% and 45.3% in total and Portuguese samples, respectively. TUG, 10-meter walking speed test and step test could distinguish those with history of fall and those without, with statistically significant differences (p≤0.05). Taking more than 4 different medications per day, fear of falling, hearing problems and/or dizziness and the need for help getting up from a chair were related to the history of falls, TUG, walking speed and step test (p≤0.05).The sedentary lifestyle and the use of assistive devices were associated to worst results of the functional tests(p <0.05) in the Portuguese population. TUG, 10-meter walking speed test, step test were correlated with self-efficacy for the exercise. Conclusions: The incidence of falls are higher than literature have reported and it is inversely associated with the functional capacity of the community dwelling adults aged over 55 years old. Data from this study is a valuable basis for exercise prescription, taking into account the levels of risk and the levels of exercise prescription.
- Pseudorapidity dependence of long-range two-particle correlations in $p$Pb collisions at $\sqrt {s_{NN}}=$ 5.02 TeVPublication . CMS collaboration (2273 authors); Calpas, Betty; Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Di Francesco, Agostino; Faccioli, Pietro; Ferreira Parracho, Pedro Guilherme; Gallinaro, Michele; Hollar, Jonathan; Leonardo, Nuno; Lloret Iglesias, Lara; Nguyen, Federico; Rodrigues Antunes, Joao; Seixas, Joao; Toldaiev, Oleksii; Vadruccio, Daniele; Varela, Joao; Vischia, Pietro; David Tinoco Mendes, Andre; Silva, Pedro; Musella, Pasquale; Pela, JoaoTwo-particle correlations in pPb collisions at a nucleon-nucleon center-of-mass energy of 5.02TeV are studied as a function of the pseudorapidity separation (Δη) of the particle pair at small relative azimuthal angle (|Δϕ|<π/3). The correlations are decomposed into a jet component that dominates the short-range correlations (|Δη|<1), and a component that persists at large Δη and may originate from collective behavior of the produced system. The events are classified in terms of the multiplicity of the produced particles. Finite azimuthal anisotropies are observed in high-multiplicity events. The second and third Fourier components of the particle-pair azimuthal correlations, V2 and V3, are extracted after subtraction of the jet component. The single-particle anisotropy parameters v2 and v3 are normalized by their laboratory frame midrapidity value and are studied as a function of ηc.m.. The normalized v2 distribution is found to be asymmetric about ηc.m.=0, with smaller values observed at forward pseudorapidity, corresponding to the direction of the proton beam, while no significant pseudorapidity dependence is observed for the normalized v3 distribution within the statistical uncertainties.
- Autonomous RPCs for a Cosmic Ray ground arrayPublication . Conceição, Ruben; Assis, Pedro; Blanco, Alberto; Carolino, Nuno; Cunha, Orlando; Dobrigkeit, Carola; Ferreira, Miguel; Fonte, Paulo; Lopes, Luis; Luz, Ricardo; Martins, Victor Barbosa; Mendes, Luis; Pereira, Américo; Pimenta, Mário; Sarmento, Raul; Shellard, Ronald; de Souza, Vitor; Tomé, BernardoWe report on the behaviour of Resistive Plate Chambers (RPC) developed for muon detection in ultra-high energy cosmic ray (UHECR) experiments. The RPCs were developed for the MARTA project and were tested on field conditions. These RPCs cover an area of $1.5 \times 1.2\,{m^2}$ and are instrumented with 64 pickup electrodes providing a segmentation better than $20\,$cm. By shielding the detector units with enough slant mass to absorb the electromagnetic component in the air showers, a clean measurement of the muon content is allowed, a concept to be implemented in a next generation of UHECR experiments. The operation of a ground array detector poses challenging demands, as the RPC must operate remotely under extreme environmental conditions, with limited budgets for power and minimal maintenance. The RPC, DAQ, High Voltage and monitoring systems are enclosed in an aluminium-sealed case, providing a compact and robust unit suited for outdoor environments, which can be easily deployed and connected. The RPCs developed at LIP-Coimbra are able to operate using a very low gas flux, which allows running them for few years with a small gas reservoir. Several prototypes have already been built and tested both in the laboratory and outdoors. We report on the most recent tests done in the field that show that the developed RPCs have operated in a stable way for more than 2 years in field conditions.
- Estudo do efeito do Country of Origin nos Produtos Açorianos: Mercados dos LacticíniosPublication . Rego, Filipa Maria Silva; Farinha, NunoA presente dissertação visa estudar o impacto que o country of origin dos produtos lácteos açorianos detém junto dos consumidores, ou seja, se o fato do leite ser açoriano influencia o ato de compra dos mesmos. Este estudo tem inicio num enquadramento teórico do tema, no qual se traduz a revisão da literatura, onde serão abordados e, consequentemente, aprofundados alguns conceitos fundamentais como o efeito do country of origin e o mercado dos lacticínios dos Açores. Após concluída a parte teórica, foi feito um estudo, de modo a enquadrar o tema e, posteriormente, desvendar qual o estudo mais apropriado de maneira a responder à pergunta de partida desta investigação. Portanto, através de um estudo de mercado descritivo deu-se início à metodologia, com recurso a duas fases, fase qualitativa onde engloba uma estratégia explorativa que tem como finalidade elaborar a fase seguinte, a fase descritiva. Com recurso aos inquéritos realizados, e a toda a investigação, foi possível concluir que o efeito do country of origin está presente nos produtos açorianos, mais precisamente no leite açoriano. Este é decisivo na escolha do consumidor, sendo assim, é dada grande importância à origem de produção dos produtos lácteos.