Proposed is a theoretically exact formula for inversion of data obtained by a spiral CT scan with a 2-D detector array. The detector array is supposed to be of limited extent in the axial direction. The main property of the formula is that it can be implemented in a truly filtered backprojection fashion. First, one performs shift-invariant filtering of a derivative of the cone beam projections,...

a major reason why many developing nations have not made significant advancement in sustainable development (sd) agenda is the neglect of existing building stock which forms the bulk of built assets. although sustainable development is a universal challenge, it cannot be approached in the same way for all nations, but rather practical response can be defined nationally or locally. this paper re...

The responsivity to long wavelength ~513 and 1253 mm! far-infrared ~FIR! radiation and the root mean square noise voltage has been measured for one bulk GaAs and two GaAs/AlGaAs multiquantum-well ~MQW! hot-electron photodetectors as a function of temperature from 4.49 to 77 K. From these data the noise-equivalent power ~NEP! was determined for each device over the same temperature range. The MQ...

The multi-detector, multi-ray source switching function ray DR / ICT integration testing system has been developed, which covers international strongly development of ray digital imaging detection technology. Development of the test system forms the ray digital imaging product development capability of independent property serialization, and provides the conditions for the ray imaging detection...

Recently an important and interesting nonlinear generalized likelihood ratio (GLR) detector emerged in functional magnetic resonance imaging (fMRI) data processing. However, the study of that detector is incomplete: the probability density function (pdf) of the test statistic was draw from numerical simulations without much theoretical support and is therefore, not firmly grounded. This corresp...

The cyclostationary properties of Direct Sequence Spread Spectrum signals are well known. These cyclostationary properties imply a redundancy between frequency components separated by multiples of the symbol rate. In this paper we present a Multiple Access Interference Canceller that explores this property and applies to UMTS-TDD. This frequency domain Canceller acts in the spreaded signal in s...

This paper is on the Consensus problem, in the context of asynchronous distributed systems made of n processes, at most f of them may crash. A family of failure detector classes satisfying a Perpetual Accuracy property is first defined. This family includes the failure detector class S (the class of Strong failure detectors defined by Chandra and Toueg) central to the definition of a class (Sx)...

In this paper, we regard as a coded transmission over a frequency-selective channel. We plan to study analytically the convergence of the turbo-detector using a maximum a posteriori (MAP) equalizer and a MAP decoder. We demonstrate that the densities of the maximum likelihood (ML) exchanged during the iterations are e-symmetric and output-symmetric. Under the Gaussian approximation, this proper...

The previously analyzed holographic encoding of bulk matter is generalized from wedges to double cones. As a result of the conformal invariance of the holographically projected wedge-bulk matter, one may apply a conformal transformation in the ambient space which maps the holographic projection of the wedge into that of the double cone. In the massive case this conformal map cannot be used for ...

Despite the availability of various alkaline phosphatase (ALP) isoenzymes, the calf enzyme is being used in current enzyme assays as the detector enzyme. The glycosylation pattern of this enzyme makes it a suitable ligand for binding to wheat germ agglutinin lectin (WGA). As a result of this property, the enzyme can not be used as a conjugate with this lectin, and the calf enzyme conjugates can...