High-temperature excess current and quantum suppression of electronic backscattering in a 1-D system

We consider the electronic current through a one-dimensional conductor in the ballistic transport regime and show that the quantum oscillations of a weakly pinned single scattering target results in a temperature- and bias-voltage independent excess current at large bias voltages. This is a genuine effect on transport that derives from an exponential reduction of electronic backscattering in the elastic channel due to quantum delocalization of the scatterer and from suppression of low-energy electron backscattering in the inelastic channels caused by the Pauli exclusion principle. We show that both the mass of the target and the frequency of its quantum vibrations can be measured by studying the differential conductance and the excess current. We apply our analysis to the particular case of a weakly pinned C60 molecule encapsulated by a single-wall carbon nanotube and find that the discussed phenomena are experimentally observable.Comment: 4 pages, 4 figure

An Hybrid Approach for Identification of Breast Cancer using Mammogram Images

Breast Cancer (BC) is the first among the cancer deaths in women all over the world. Mammography is broadly perceived as the best imaging methodology for the early location of BC. Mammography examination reduced the BC death in spite of increasing number of noticed malignancies during the last decade. Although it is the best reliable method for early location, it has several limitations. One essential viewpoint is that the exactness rate tends to diminishing when doctors' examined high volume of mammograms. This work mainly concentrates on identifying regions containing small clusters of micro calcifications to categorize the tissue as being regular or irregular. Potentially cancerous tissue is distinguished from normal tissue by analyzing features of a given region within a mammogram. Therefore, feature extraction and saliency play an important role in cancer detection