introduction echo-planar imaging (epi) is a group of fast data acquisition methods commonly used in fmri studies. it acquires multiple image lines in k-space after a single excitation, which leads to a very short scan time. a well-known problem with epi is that it is more sensitive to distortions due to the used encoding scheme. source of distortion is inhomogeneity in the static b0 field that ...

We study the correlation between total number of critical points random spherical harmonics and with value in any interval I ⊂ <mml:mi math...

Introduction: In compressed sensing, a problem with random phase encoding patterns is that the eddy current performance is much worse and can lead to significant artefacts because the resulting k-space distortions may be very different on adjacent k-space samples. This undermines performance in random sampling strategies. We have explored combining regular gradient sampling with randomly select...

Due to the fast evolution of digital data exchange, security of information becomes important. For industrial process images are used widely, therefore it is necessary to protect the confidential information. In the proposed work for encryption of image by the use of Fractional Fourier Transform(FRFT).This method enhances the security of data in comparison to DFT. In the proposed work we will b...

due to business and environmental issues, the efficient design of an integrated forward/reverse logistics network has recently attracted more attention from researchers. the significance of transportation cost and customer satisfaction spurs an interest in developing a flexible network design model with different delivery paths. this paper proposes a flexible mixed-integer programming model to ...