In Electrophysiology catheter ablation is an established treatment for cardiac arrhythmias. Nevertheless, complicated ablation procedures such as Pulmonary vein isolation for atrial fibrillation treatment are difficult to learn. This can be improved by a better integration of the image modalities available today and in the future Electrophysiology lab. In this paper, we present a method to regi...

In this paper we study a specific subclass of abstract elementary classes. We construct a notion of independence for these AEC’s and show that under simplicity the notion has all the usual properties of first order non-forking over complete types. Our approach generalizes the context of א0 -stable homogeneous classes and excellent classes. Our set of assumptions follow from disjoint amalgamatio...

Shelah has shown in [4] that א1-categoricity for Abstract Elementary Classes (AEC’s) is not absolute in the following sense: There is an example K of an AEC (which is actually axiomatizable in the logic L(Q)) such that if 2א0 < 2א1 (the weak CH holds) then K has the maximum possible number of models of size א1, whereas if Martin’s Axiom at א1 (denoted by MAא1) holds then K is א1-categorical. In...

Numerous IT adoption studies within the AEC industry identify issues with individuals resisting IT changes. Current change models often only look at organizations and tasks and frequently neglect the individuals involved. The limitations in existing change models and the criticality of people issues in the successful implementation of change necessitates the investigation of individual resistan...

This study presents a tap-leakage adjustment algorithm to control the tap drifting problem in an adaptive echo canceller. A nonrecursive transversal filter structure and stochastic gradient adaptation algorithm are first studied. On the basis of these studies, the effect of tap drift when the input spectrum does not cover the full band is presented. The tap-leakage algorithm, which has been use...

VoIP (voice over internet protocol) is very popular communication technology of this century and has played tremendous role in communication system. It is preferred by all because it deploys many benefits it uses Internet protocol (IP) networks to deliver multimedia information such as speech over a data network. VoIP system can be configured in these connection modes respectively; PC to PC, Te...

July–September 1998 Copyright 1998. Lucent Technologies Inc. All rights reserved. Introduction At present, most teleconferencing systems use a single full-duplex audio channel for voice communication. These systems usually employ an acoustic echo canceler (AEC) to remove undesired echoes that result from the coupling between a loudspeaker and a microphone. As these systems evolve to an ever mor...

WC focus on the problem of stereophonic acoustic echo cancellation for teleconference applications. To limit the wcllknown detrimental effect of the correlation between the loudspeaker input signals, WC propose a new method which consists in adding to these signals random noises controlled by auditory properties. We describe this method in some details and a we show that its complexity can be f...