Measurement of the Cosmic Ray e+ plus e- Spectrum from 20GeV to 1TeV with the Fermi Large Area Telescope
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Designed as a high-sensitivity gamma-ray observatory, the Fermi Large Area Telescope is also an electron detector with a large acceptance exceeding 2m^2 sr at 300 GeV. Building on the gamma-ray analysis, we have developed an efficient electron detection strategy which provides sufficient background rejection for measurement of the steeply-falling electron spectrum up to 1 TeV. Our high precision data show that the electron spectrum falls with energy as E^(-3.0) and does not exhibit prominent spectral features. Interpretations in terms of a conventional diffusive model as well as a potential local extra component are briefly discussed.
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Rationale, design and methods for a randomised and controlled trial to investigate whether home access to electronic games decreases children's physical activityStraker, Leon; Abbott, R.; Piek, Jan; Pollock, Clare; Davies, P.; Smith, Anne (2009)Background: Many children are reported to have insufficient physical activity (PA) placing them at greater risk of poor health outcomes. Participating in sedentary activities such as playing electronic games is widely ...
To remove or to replace traditional electronic games? A crossover randomised controlled trial on the impact of removing or replacing home access to electronic games on physical activity and sedentary behaviour in children aged 10-12 years.Straker, Leon; Abbott, R.; Smith, Anne (2013)Objective: To evaluate the impact of (1) the removal of home access to traditional electronic games or (2) their replacement with active input electronic games, on daily physical activity and sedentary behaviour in children ...
Effects of home access to active videogames on child self-esteem, enjoyment of physical activity, and anxiety related to electronic games: results from a randomized controlled trialAbbott, R.; Smith, Anne; Howie, Erin; Pollock, Clare; Straker, Leon (2014)Objective: Active-input videogames could provide a useful conduit for increasing physical activity by improving a child’s self-confidence, physical activity enjoyment, and reducing anxiety. Therefore this study evaluated ...