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Recent studies have shown that the cyclooxygenase (COX) and the inducible nitric oxide synthase (iNOS) pathways are involved in the development of tumor angiogenesis in human cancers.To investigate whether a different pattern of COX-2 and iNOS expression/activity exists within different areas of colorectal tumors and to analyze the relationship between these two enzymes and tumor angiogenesis.Microvessel...
Inverse Synthetic Aperture Radar is a signal processing technique used to obtain high resolution images of targets. In ISAR imaging high cross-range resolution is obtained by exploiting the radar to target relative motion. The radar target kinematic affects the data grid spacing and shape in the Fourier domain (acquisition surface). When the grid is rectangular with equally spaced points, the ISAR...
High range resolution (HRR) profiles can be obtained using stepped frequency waveforms. A burst of linearly frequency modulated pulses on different carrier frequencies are transmitted and a suitable signal processing combines the returned echoes from each pulse to obtain a wide synthetic bandwidth. Target motion during stepped frequency processing causes several degradation effects, which inevitably...
This paper present a STAP algorithm for an airborne high PRF pulse Doppler sensor based on clutter segmentation process that allows the inversion of a LN x LN matrix instead of MN x MN estimated on a single CPI (coherent processing interval). Since the radar works with the spectra of the received signals itpsilas possible to obtain the estimation of the covariance matrix simply eliminating from the...
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