Discrete Fourier transform (DFT) is widely used in almost all fields of science and engineering. Fast Fourier transform (FFT) is an efficient tool for computing DFT. In this paper, we present a fast Fourier transform (FFT) algorithm for computing length-q × 2 DFTs. The algorithm transforms all q-points sub-DFTs into three parts. In the second part the operations of sub-transformation contain on...

abstract aim and background: studying the role of background causes and biomarkers on early onset cardiovascular diseases' incidence as one important issue is need for prevention of these diseases. the purpose of this study was to identify the role of background factors and biomarkers for early onset cardiovascular diseases' incidence. methods and materials: in a descriptive study with cross-se...

1 Department of Pediatric Surgery, Children’s Hospital of Michigan, Detroit, MI 48201, USA 2 Department of Electrical & Computer Engineering, Wayne State University, Detroit, MI 48202, USA 3 Department of Physics, Wayne State University, Detroit, MI, 48202, USA 4 Department of Natural Sciences, University of Michigan-Dearborn, Dearborn, MI 48128, USA 5 Department of Pathology, Children’s Hospit...

Three areas of activity in the field of low-level radiation epidemiology have been reviewed. They concern the questions of cancer risk related to antenatal X-ray exposure, occupational radiation exposure, and residence in areas of real or supposed increased levels of radiation. Despite the a priori unlikelihood of useful information developing from studies in any of these areas, such investigat...

A real time visualisation method, to be used in mobile gamma-spectrometric search operations using standard detector systems is presented. The new method, called deviation display, uses a modified waterfall display to present relative changes in spectral data over energy and time. Using unshielded (137)Cs and (241)Am point sources and different natural background environments, the behaviour of ...

Previous articles have described a process for the elimination of background from fingerprint and other images by subtracting the background. Two options, f iltration and erasure, have been discussed. Channel subtraction, either in RGB (Red, Green, Blue) or HSI (Hue, Saturation, Intensity) mode, can also be effected with variable results. There exists a fourth option: substituting another item ...

I review the nature of the diffuse cosmic ultraviolet background radiation. The ultraviolet background is the last frontier: all the other diffuse backgrounds have been examined, at least at some level. The ultraviolet background has only begun to be explored; it offers rich promise of new astrophysical knowledge.

Pseudocapsular exfoliation occurs in most races and countries but appears to be particularly common in Norway and in the Eastern European and Mediterranean countries. It is rare in American Negroes, only two cases having been reported (Gradle and Sugar, 1947), and in Negroes in the West Indies (Connell, I970), and has not been reported in Negroes elsewhere outside South Africa (Bartholomew, I97...

The distinct color ow of the qq ! qqH; H ! W + W ? process leads to suppressed radiation of soft gluons in the central region, a feature which is not shared by major background processes like t t production or q q ! W + W ?. For the leptonic decay of a heavy , it is shown that these backgrounds are typically accompanied by minijet emission in the 20{40 GeV range. A central minijet veto thus con...

Vehicle detection is an essential task in the intelligent transportation system, which will affects the performance of surveillance directly. This paper presents an approach to detect vehicle from a sequence of traffic images obtained from expressway scenes. Firstly, inter-frame difference method was used to choose some frames with small traffic flow, and then pixels detected as background are ...