Besides accurate capacitance determination, an equivalent-circuit analysis reveals the ion configurations of microsupercapacitors that lead to non-linear electronic behaviors of these miniature energy-storage devices.

This research explores using interdigitated electrode arrays (IDE) screen-printed on paper substrate for electrochemical measurements in steady state. Because the steady state is strongly related to IDE dimensions, the accuracy and fabrication reproducibility were assessed for 120- and 200-mesh stencils. Simulations were used to predict the limiting current and time response and as a benchmark for comparison with the experimental results. For accurate comparison, evaporation was prevented using a homemade humidity box, which enabled measurements for periods as long as 30 min. Although cyclic voltammetry measurements in steady state were possible, this required ~15 min per cycle when using the smallest electrodes (band width of 0.205 mm). Chronoamperometric measurements reaching steady state were also possible, requiring ~5 min for the largest electrodes (band width of 0.376 mm). Regarding the measurement reproducibility, the relative standard deviations (RSD) of current and response time were ~12% and ~26%, respectively. We attribute this to the fabrication reproducibility (8% RSD). Experimental currents were ~30% to ~34% of their simulated counterparts. Conversely, the simulated response times were ~30% to ~50% of their experimental counterparts. We ascribe these discrepancies to the porosity of wet paper (Whatman 2 CHR), estimated to be ~31%.

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Este trabajo describe el área de la telemedicina como herramienta de gestión para el sistema público de salud en Chile. Se incluye las tres áreas relevantes como lo son la descripción de los procesos involucrados, las tecnologías de la información utilizadas y los diversos recursos humanos y materiales necesarios para aumentar la calidad de los servicios ofrecidos a los pacientes a través de los hospitales públicos en la Octava región en Chile.  Se describe un proyecto de teleasistencia financiado por organismos del Estado y se muestran sus resultados preliminares.  Además se identifican áreas futuras de desarrollo con el fin de incentivar a profesionales de la ingeniería para que se involucren en la investigación y desarrollo del sistema público de salud.