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A new synthetic method for the formation of uniform α-Fe 2 O 3 nanoparticles was reported and their magnetic properties were investigated. The sonochemical synthesis and the subsequent takeoff technique resulted in spherical shaped α-Fe 2 O 3 nanoparticles with an average diameter of 60 nm. The temperature-and applied magnetic field-dependent magnetization of the α-Fe 2 O 3 nanoparticles was explained by the sum of two contributions, i.e., the Morin transition and superparamagnetism, because the critical size for superparamagnetism was within the size variation of the nanoparticles.

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Two CNNs models are proposed to detect dynamic obstacles in urban setting so as to improve BVI pedestrian's navigation decision. First, we re-implement the inspired model, yolov2, on KITTI datasets. Regarding evaluation, the two models perform better than yolov2 from 6.26% to 10.99% on car detection at different difficulty levels.

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