Digital images and video are prolific in the world today owing to the ease of acquiring, processing, storing and transmitting them. Several common image processing operations such as compression, dithering and printing affect the quality of the image. Advances in sensor and networking technologies, from the internet to wireless networks, has led to a surge of interest in image communication sys...

introduction: in single photon emission computed tomography (spect), the projection data used for image reconstruction are distorted by several factors, including attenuation and scattering of gamma rays, collimator structure, data acquisition method, organ motion, and washout of radiopharmaceuticals. all these make reconstruction of a quantitative spect image very difficult. simulation of a sp...

In a recent work Cantrell, Cosner and Ruan show that intraspecific interference is responsible for coexistence of many consumers for one resource with a logistic like growth rate. Recently, we have established a similar result for the case of a chemostat using a rather different technique. In the present note, we complement these two works to the case of an unknown nonlinear growth rate for the...