We utilized the TanDEM-X digital elevation model (DEM) for investigating complete record of confirmed terrestrial impact structures with respect to its suitability support geological analysis. The consistently high resolution and accuracy this is a prerequisite detailed morphological studies. This DEM represents an interesting repository aid in preparing executing fieldwork exploration new crat...

Abstract Alternative to the traditional analog methods, several digital data preprocessing, shaping and postprocessing techniques have been investigated for improvement in energy resolution of dispersive x-rays detectors. Initial experimental results show that by preprocessing data, better can be obtained at shorter times; thus, it will allow good time high count rates.

We examine the security of several digital signature schemes based on algebraic block codes. It is shown that Xinmei’s digital signature scheme cau be totally broken by a known plaintext attack with complexity O(k3), where t is the dimension of the code used in the scheme. Harn and Wang have proposed a modified version of Xinmei’s scheme that prevents selective forgeries. Their scheme is also s...

Current X-ray observatories, archival X-ray data, and the Sloan Digital Sky Survey (SDSS) represent a powerful combination for addressing key questions about active galactic nuclei (AGN). We describe a few selected issues at the forefront of X-ray AGN research and the relevance of the SDSS to them. Bulk X-ray/SDSS AGN investigations, X-ray weak AGN, red AGN, hard X-ray selected AGN, high-redshi...

This contribution discusses a selection of today's techniques and futurc concepts for digital x-ray imaging in medicine. Advantages of digital imaging over conventional analog methods include the possibility to archive and transmit images in digital intormation systems as well as to digitally process pictures before display, for example, to enhance low contrast details. After reviewing two digi...

Digital Terrain Model (Digital Terrain Model acronym DTM) is arbitrary use of a large number of coordinates in three-dimensional x, y, z coordinates of the point on the ground for a form of Statistics said that the terrain surface morphology is the number of attribute information is a space location characteristics and attributes of the terrain described the figures, initially for the automatic...

Digital capture with consumer digital still camera of the radiographic film significantly decreases the dynamic range and, hence, the details visibility. We propose a method that boosts the dynamic range of the processed X-ray image based on the fusion of a set of digital images acquired under different exposure values. The fusion is controlled by a fuzzy-like confidence information and the lum...