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A system of magnetic field goniometry wasdeveloped for measuring the frequency of stomachcontractions. This technique uses a handheld, electroniccompass to measure the angular change in direction of a magnetic field generated by a small, ingestedmagnet. Measurements of gastric mechanical activity madeby goniometry were validated with(More)
In this paper, we summarize our present understanding of Mars' atmosphere, magnetic field, and surface and address past evolution of these features. Key scientific questions concerning Mars' surface, atmosphere, and magnetic field, along with the planet's interaction with solar wind, are discussed. We also define what key parameters and measurements should(More)
It has been suggested that the large scale use of biofuel, that is, fuel derived from biological materials, especially in combination with reforestation of large areas, can lead to a low-cost reduction of atmospheric carbon dioxide levels. In this paper, a model of three markets: fuel, wood products, and land are considered with the aim of evaluating the(More)
  • F Forget, M Angelats I Coll, +6 authors M And Lopez-Puertas
  • 2011
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