We examine the eeect of removing synchronisation points from a parallel implementation of a simple iterative algorithm|Jacobi's method for linear systems. We nd that in some cases the asynchronous version requires fewer iterations to converge than its synchronous counterpart. We show that this behaviour can be explained in terms of the presence or absence of oscillations in the sequence of erro...

A new asynchronous cellular automata model is described. The model provides an experimental and theoretical framework to investigate quantitatively realistic simulations. The parallel execution of such simulations introduces the need of synchronisation of the asynchronous parallel processes. Time Warp is proposed as a synchronisation method for the parallel asynchronous cellular automata. We in...

Qualifying types represent a new approach to modifying the behaviour of instances of other types in a general way, in the form of components which can be designed and implemented without a prior knowledge of the types to be modified or their implementations. This paper illustrates the idea by showing how they can be used to program various standard synchronisation problems, including mutual exc...

In this article, we identify some of the key problems that may be encountered when designing Non-Coherent (NC) Multiple-Input Multiple-Output (MIMO) DownLink (DL) synchronisation schemes for communicating over multi-path fading channels. Our main objectives are to illustrate the information theoretic features and to provide design guidelines for the initial synchronisation of NC MIMO systems. W...

Downlink synchronisation emr estimarors suited for OFDM-TDMA wireless LAN are presented. The focus is on the timing error estimator, which is of the Early-Late type and has a low complexity, making it attractive for high speed systems. It also allows a large sharing of the computational burden with the fnquency ermr estimator. The estimator is presented and analysed. Simulations art performed t...

In a process-driven and service-oriented architecture, parallel and independently running business processes might need to be synchronised according to dependencies of complex business scenarios. In this paper we describe three software patterns that address such rather advanced synchronisation issues between business processes running in parallel. The patterns focus on coordinating the paralle...

The aim of this work was to study the role of subthalamo-pallidal synchronisation in the pathophysiology of dyskinesias. We recorded local field potentials (LFPs) in a patient with Parkinson's disease and left surgery induced dyskinesias with double, bilateral deep brain stimulation electrode implants in the subthalamic nucleus (STN) and the globus pallidus internus (GPi). Synchronisation was s...

The synchronisation of Tree Parity Machines (TPMs), has proven to provide a valuable alternative concept for secure key exchange. Yet, from a cryptographer’s point of view, authentication is at least as important as a secure exchange of keys. Adding an authentication via hashing e.g. is straightforward but with no relation to Neural Cryptography. We consequently formulate an authenticated key e...

Time synchronisation has been extensively used in wireless sensor networks in many contexts, such as data fusion, TDMA schedules and synchronised sleep periods. Precision is the basic requirement for time synchronisation in wireless sensor networks. Existing time synchronisation methods were not designed to deal with dynamic environment changes. In this paper, we propose an error compensation a...