A vision system is applied to full-field displacements and deformation measurements in solid mechanics. A speckle like pattern is preliminary formed on the surface under investigation. To determine displacements field of one speckle image with respect to a reference speckle image, sub-images, referred to Zones Of Interest (ZOI) are considered. The field is… (More)
The fractional Fourier transform (FrFT) is used for the solution of the diffraction integral in optics. A scanning approach is proposed for finding the optimal FrFT order. In this way, the process of diffraction computing is speeded up. The basic algorithm and the intermediate results at each stage are demonstrated.
The extraoral appliance which is used for the treatment of patients after teeth extraction causes problems when there is lack of cooperation on the part of the patient. The appliance we present here consists of fabricated rings with brackets for the molars, lingual semicannulas, an outer arch, a lingual arch with a palatine button. The appliance distalizes… (More)