This paper presents a new structure of an Acoustic Echo Canceller (AEC) designed to operate in the Mobile Switching Center (MSC) of a GSM network. The purpose of such system is to cancel the echo for all the subscribers. Contrarily to the conventional AEC, the proposed combined AEC/CELP Predictor is able to take into account the non linearities introduced by the GSM speech coders/decoders. A sh...

This paper considers the eigenvalues of symmetric Toeplitz matrices with independent random entries and band structure. We assume that the entries of the matrices have zero mean and a uniformly bounded 4th moment, and we study the limit of the eigenvalue distribution when both the size of the matrix and the width of the band with non-zero entries grow to infinity. It is shown that if the bandwi...

Dedicated to Professor Heinrich Nöth on the occasion of his 85th birthday Recrystallization of silver pentacyanocyclopentadienide Ag[C5(CN)5] from N,N-dimethylformamide (DMF) gives the polymeric 1 : 1 complex [Ag{C5(CN)5}(DMF)] (1). The Ag+ cation is coordinated by three N atoms of three different [C5(CN)5] anions and two O atoms of two DMF molecules. Each [C5(CN)5] is coordinated via three nei...

A simple condu ctometric t it ration method is disc Ll ssed for the determination of sulfhydryl groups in nonionic polym er n etwork s, s Llch as disulfide a nd alkylene sulfide crosslinked polycaprolactam fibers. The diffusion of the t itrant into t he crosslinked polymer is acco mplished ' by swelling t he ne twork struc t ure, thereby eliminating the necessity of d estroying t he crosslinks ...

In this paper the notion of logbook is introduced as a common basis for various models to be produced during system analysis. A logbook has a unifying format which contains a complete description of the history of some Universe of Discourse. It is intended as a struc-turing mechanism for initial speciications based on natural language. A typing mechanism is provided as an abstraction mechanism ...

on quality of care as well as the strong connection between targets and the management system. The findings show that the presence of targets influenced the advice and information workers provided, pushing them towards long-term methods such as sterilisation and the IUD rather than helping clients select methods most suited to their needs. The paper then shows the connection between the target ...

We introduce metaprogramming facilities into the Oberon V system Metaprogramming means that a module can access the struc ture of other modules i e procedures types run time data at run time We discuss how type safety can be enforced in an environment with strong typing Finally we show how metaprogramming can be used to implement an easy to use database interface and conclude with a com parison...

We describe the design of a parallel global atmospheric circulation model, PCCM2. This parallel model is functionally equivalent to the National Center for Atmospheric Research's Community Climate Model, CCM2, but is struc-tured to exploit distributed memory multicomputers. PCCM2 incorporates parallel spectral transform, semi-Lagrangian transport, and load balancing algorithms. We present detai...

The Multimodal User Supervised Interface and Intelligent Control (MUSIIC) project is working towards the development of an assistive robotic system which integrates human-computer interaction with reactive planning techniques borrowed from artificial intelligence. The MUSIIC system is intended to operate in an unstructured environment, rather than in a struc-tured workcell, allowing users with ...

This paper deals with the solution of large linear systems which arise when certain optimization methods are applied in image de-blurring. An unconstrained penalized least squares minimization problem with total variation penalty is considered. Also addressed are several penalized least squares problems with nonnegativity constraints imposed on the solution. In each case, quasi-Newton technique...