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Contribution of plantar pressure to the prevention and quantification of the muscle-skeletal injury risk in hiking trails - a pilot study

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Gabriel R. , Monteiro M. , Moreira H. , Maia M.

tom Vol. 10, nr 3

51-54

Hiking trails have been growing in popularity in the health and well-being promotion. Consequently, the foot became an object of study in order to understand the discomfort and pain in the lower limb. The aims of the work were: 1) to detect tendencies for behaviour of maximum values of plantar pressure (MaxP) during the walk on different slopes, 2) to contribute to the methodology of the difficulty level of hiking trails. Equations show strong tendencies (R2 > 0.8) of behaviour of MaxP in the lateral zones of the heel, 4th and 5th metatarsus as well as in the plantar zone of the hallux. The analysis of the difficulty level of the hiking trails branches deserves a separate presentation, including the technical difficulty analysis (with a compulsory emphasis on the biomechanics) and information on the caloric consumption and on the slopes of each branch.

Migration measurements from plastic packaging: a simulation study on influence of initial concentration profile

100%

Manzoli J. E. , Rosa F. M. L. , Silva Felix J. , Monteiro M.

2007

tom Vol. 14, nr 1

117-124

Migration of components from plastic packaging into foodstuffs or into medicines is a very important issue, concerning public health. Using experimental techniques, like gas chromatography-mass spectrometry, these essays measure total migration and specific migration of components from plastic packaging. This work presents an explanation and applications of a numerical technique tool for this measurement, allowing the comprehension of the diffusion process and the estimate of component migration in difficult or impractical measurements. As an application example, the non-uniform influence of initial concentration profile on the migration is presented, demonstrating the necessity of this profile determination for high quality considerations on involved metrology.