The mechanical properties of myocardium vary across the transmural aspect of the left ventricular wall. Some of these functional heterogeneities may be related to differences in excitation-contraction coupling characteristics that have been observed in cells isolated from the epicardial, mid-myocardial and endocardial regions of the left ventricle of many species, including canine. Integrative ...

The aim of this report is to review a theoretical approach that has been proposed recently to describe dynamic fluctuations in glassy systems (work in collaboration with H. E. Castillo, C. Chamon, P. Charbonneau, J. L. Iguain, M. P. Kennett, D. R. Reichman and M. Sellitto). Firstly, I summarize some of the main features of the averaged and global non-equilibrium relaxation of glassy systems, we...

The Composite Information System/Tool Kit (CIS/TK) is a prototype implementation strategy for accessing and integrating data from multiple disparate database systems. This prototype focuses on data access and schema integration, and in particular on the integration of disparate data semantics. In this paper we describe the CIS/TK prototype as well as research important for the further developme...

This survey reviews a dynamic multi-asset framework in which heterogeneous agents with multi-period planning horizons interact. This framework distinguishes between temporary equilibrium maps describing the basic market mechanism of an asset market, forecasting rules which model the way in which expectations are formed, and a model for exogenous random perturbations. Perfect forecasting rules w...

The ability to numerically simulate single phase and multiphase ow of uids in porous media is extremely important in developing an understanding of the complex phenomena governing the ow. The ow is complicated by the presence of heterogeneities in the reservoir at many diierent length scales and by phenomena such as diiusion and dispersion. These eeects must be eeectively modeled by terms in co...

We study synchronization in heterogeneous FitzHugh-Nagumo networks. It is well known that heterogeneities in the nodes hinder synchronization when becoming too large. Here we develop a controller to counteract the impact of these heterogeneities. We first analyze the stability of the equilibrium point in a ring network of heterogeneous nodes. We then derive a sufficient condition for synchroniz...

We study synchronization in delay-coupled neural networks of heterogeneous nodes. It is well known that heterogeneities in the nodes hinder synchronization when becoming too large. We show that an adaptive tuning of the coupling matrix can be used to counteract the effect of the heterogeneity. Our adaptive controller is demonstrated on ring networks of FitzHugh-Nagumo systems which are paradigm...

Data quality issues have taken on increasing importance in recent years. In our research, we have discovered that many “data quality” problems are actually “data misinterpretation” problems – that is, problems caused by heterogeneous data semantics. In this paper, we first identify semantic heterogeneities that, when not resolved, often cause data quality problems. We discuss the especially cha...

In this paper we present a semantic B2B gateway based on the WSMX semantic Service Oriented Architecture to tackle heterogeneities in RosettaNet messages. We develop a rich RosettaNet ontology and use the axiomatised knowledge and rules to resolve data heterogeneities and to unify unit conversions. We define adaptive executable choreographies, which allow a more flexible integration of supplier...

Coarse spaces are instrumental in obtaining scalability for domain decomposition methods. However, it is known that most popular choices of coarse spaces perform rather weakly in presence of heterogeneities in the coefficients in the partial differential equations, especially for systems. Here, we introduce in a variational setting a new coarse space that is robust even when there are such hete...