Beatriz Araya

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In this paper, we are concerned by the improvement of the maintenance procedures in heavy mining equipment. Criticality is an important concept in the maintenance task because it points out which piece of equipment has a higher probability to fail, and how this failure may impact the general productive process. The paper proposes a definition of criticality(More)
In this work a neural network NARX model has been developed in order to predict availability of a heavy duty equipment of an important copper mining site in Chile. Four exogenous inputs have been considered (Number of Detentions, Mean Time to Repair, Mean Time between Failures and Use of Physical Availability) while Availability is the autoregressive(More)
OBJECTIVES Chile is a post-transitional country evolving towards a stationary population pyramid, which may be associated with increasing preterm birth (PTB) rates. This study aimed to compare maternal sociodemographic characteristics between the start of the post-transition phase (1994) and an established stage (2013) and to evaluate associations between(More)
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