We present an optimized channel coding scheme for OFDM transmitter. Traditional coding methods use regular codes, in the sense that each bit participates in the same way to the channel encoding. Our approach consists in using a priory assumption on the channel available at the transmitter in order to optimize the coding scheme. We have considered the irregular Gallager block codes in our study....

Cryptographic algorithms are composed of many complex mathematical functions. When analyzing the complexity these algorithms, one fixes priory overall algorithm as most dominating operations for a group operations. Generally, it is count this operation which determines in case compounding We have instead used weight factor to determine an with operating functions working simultaneously and take...

On March 6 and 7, 1989, 28 researchers with expertise in cerebrovascular disease, clinical trial methodology, and biostatistics met at the Priory of Corsendonk, Belgium, to exchange views on the problems in design of clinical trials in stroke. The symposium was organized and chaired by Drs. W. Amery (Beerse, Belgium), M-G. Bousser (Paris, France), F. Clifford Rose (London, UK), J.I.S. Robertson...

This paper presents a filtering technique for regularizing tensor fields. We use a nonlinear filtering technique termed normalized convolution [Knutsson and Westin 1993], a general method for filtering missing and uncertain data. In the present work we extend the signal certainty function to depend on locally derived certainty information in addition to the a priory voxel certainty. This result...

Outlined images can be used for communication between users. Using the combination of semantic knowledge, scenes having user initiated motion, discretised gauges, and placement of these images present an opportunity to machine translate a storyboard into a paragraph. This paragraph can be synthesised into speech. The story results in a target language free representation, without prior knowledg...

In this paper we introduce a novel approach of foreground-background-shadow separation. Our method tries to extract the accurate silhouettes of foreground objects even if they have partly background like colors and shadows are observable on the image. It does not need any a priory information about the shapes of the objects, it assumes only they are not point-wise. The method exploits temporal ...

In many of the studies concerning Accelerated life testing (ALT), the log linear function between life and stress which is just a simple re-parameterization of the original parameter of the life distribution is used to obtain the estimates of original parameters but from the statistical point of view, it is preferable to work with the original parameters instead of developing inferences for the...

Copyright 2006 Psychonomic Society, Inc. The second author was supported by a VENI grant from the Dutch Organization for Scientific Research (NWO). The third author was supported by NIMH Grant R37-MH44640. We thank Michael Lee, David Gilden, Thomas Thornton, and an anonymous reviewer for their insightful reviews of a previous version of the manuscript. We are also grateful for Tom Thornton’s as...

When constructing a test, an initial decision is choosing an appropriate item response format which can be classified as selected or constructed. In large-scale tests where time and finance are of concern, the use of response chosen known as multiple-choice items is quite widespread. This study aimed at investigating the impact of response format on the performance of structure tests. Concurren...