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This paper describes the analysis and results of the magneto static adhesion force which required for the climbing robot to climb the high walls when additional loads are need to be carried such as scanning devices for the non-destructive testing inspection of nuclear plants or high rise wind towers. Magneto-static simulations and experiments have been carried out for the investigation of the parameters of magnetic adhesion system and the static analysis of a climbing robot is performed with regard to anti-slipping forces and antioverturning moments. The results from both simulations and experiments show that the adhesion mechanism with just two N52 magnets has enough adhesion capacity to carry a payload exceeding 300N. The prototype wheeled locomotion robot is built and magnetic adhesion mechanism has been mounted on the belly of a robot. The simulation and experimental results are compared. The experiment has been carried out in the robotic laboratory on the vertical surface and the result from the prototype show that the adhesion mechanism provides enough adhesion force for the prototype designed robot.

This project produced a sensor based robot capable of testing a section of railway track, using both magnetic flux and visual inspection. Surface quality inspection is performed by a probe consisting of a number of Hall effect sensors. Visual inspection is performed by a camera connected to the robot. A replica rail section was also created for the purposes of calibrating and demonstrating the robot. The hardware and software developed successfully collected video data and magnetic flux readings. The output of the hall effect sensor array was processed in MATLAB producing a heat-map. The shape and depth of artificially induced defects were successfully displayed.

Se evaluó la actividad antibacteriana in vitro de los extractos de etanol de los neumatóforos de Xylocarpus moluccensis (Familia: Meliaceae) y Heritiera fomes (Familia: Sterculiaceae) frente a diversas cepas bacterianas utilizando el ensayo de difusión en disco. Ambos extractos presentaron perfi les antibacterianos similares, y las zonas de inhibición fueron >10 mm en la mayoría de los casos. Estos extractos presentaron la máxima actividad frente a aerógenos Enterobacter, siendo las zonas de inhibición de 19 y 21 mm, respectivamente. La concentración inhibitoria mínima (CIM) se determinó mediante el método de dilución en caldo de cultivo. El extracto de X. moluccensis fue el más potente frente a Shigella boydii y Shigella sonnie (CIM = 200 y 300 μg/mL, respectivamente). Se puede asumir que X. moluccensis y H. fomes podrían ser fuentes potenciales de nuevos descubrimientos para el desarrollo de fármacos., The ethanol extracts of the pneumatophores of Xylocarpus moluccensis (Family: Meliaceae) and Heritiera fomes (Family: Sterculiaceae) were assessed for in vitro antibacterial activities against a number of bacterial strains using the disc diffusion assay. Both extracts showed similar antibacterial profi les, and the zones of inhibitions were >10 mm in the most cases. These extracts exhibited the most prominent activity against Enterobacter aerogenes, with the zones of inhibition of 19 and 21 mm, respectively. The minimum inhibitory concentration (MIC) was determined by the broth dilution method. The extract of X. moluccensis was the most potent against Shigella boydii and Shigella sonnie (MIC = 200 and 300 μg/mL, respectively). It can be assumed that that X. moluccensis and H. fomes could be potential sources for novel ‘lead’ discovery for antibacterial drug development.