Training of Medical Students for Mass Casualty Incidents Using Table-Top Gamification.

INTRODUCTION: "Table-top" exercises can improve knowledge and skills related to mass casualty incidents (MCIs) with little logistical efforts. We aim to evaluate the learning process of 5th year medical school students related to MCI response using table-top simulation and measure their methodology perception. METHODS: A theoretical part plus an MCI simulation board exercise was organized. Knowledge pretest and 1 mo after posttest was scored, and an assessment questionnaire with 27 questions with a Likert-type scale with 3 dimensions: methodology, knowledge acquisition, and skills acquisition was administered. Students did not receive any written or training material between pretest and posttest. RESULTS: A total of 108 (80%) completed the evaluation questionnaire, pretest, and posttest. For the pretest, average grade was 4.25 (SD = 1.71) and 42% passed, and for the posttest, average grade was 8.33 (SD = 1.28) and 97 % pass (P < 0.0001). All variables measuring methodology perception scored more than 8, except for the duration of the exercise (7.3). Most knowledge acquisition scored above 9. Self-perception skill acquisition scores were slightly lower, although all above 7. CONCLUSIONS: "Table-top" methodology is useful for acquiring knowledge and skills related to MCI response. Retention of knowledge is very high. Students consider that this methodology can be very useful for medical studies. Active or nonactive role is a factor that only influences final results in specific items.

Dielectric behavior of ceramic-graphene composites around the percolation threshold.

Al2O3/graphene and BaTiO3/graphene composites with different concentrations of the conductive second phase, both below and above the percolation threshold, were prepared by the traditional ceramic processing route followed by spark plasma sintering. It is shown that the addition of graphene pins the grain growth of the ceramic matrix grains, leading to a change of the microstructure at low filler concentrations. As a consequence, the composites exhibit two percolation thresholds and their dielectric properties are not only determined by the dielectric properties of the constituents and their relative fractions but also the microstructure of the composite must be considered. Additionally, a giant increase of the dielectric constant has been found around the percolation thresholds in barium titanate-graphene composites. In particular, values of the dielectric constant up to 45,000 and 15,000 were found at 1 kHz in composites containing 0.4 and 0.6 wt. % graphene, respectively.