This workanalyses the crystallographic martensite variants (MVs) which are activated in a Cu-Al-Be monocrystal subject to a tensile test. Four variants were observed in-situ and analyzed by means of the Schmid Factor (SF) criterion. A finite element simulation was performed to obtain the stress in the regions where the martensite variants are observed. The results of the simulation are in good agreement with the variants predicted by the SF, with only small deviations from the ideal orientation of the martensite phase. This result provides interesting information to be used in future refinements of the criteria presented in earlier research.

A principal challenge in big disasters is the well-timed attention and the help to the victims. Some countries have developed help plans for the civilian population, such as the Plan DN-III-E implemented by the Mexican Secretariat of National Defense. There are different engineering systems designed to carry out help in the place of the disaster. An example is a movable unit that is transported to the place of the disaster to transform it into a small fixed unit to offer first aid. The paper presents an evaluation of the original mobile unit and shows a new proposal of mechanisms that allow the actions necessary to automatic its deployment. The new proposal was developed using dimensional synthesis methods with restricted optimization techniques, obtaining a design that allows reducing the operation time considerably compared to the original design.