Using discrete simulations, we investigate the behavior of a model granular material within an annular shear cell. Specifically, two-dimensional assemblies of disks are placed between two circular walls, the inner one rotating with prescribed angular velocity, while the outer one may expand or shrink and maintains a constant radial pressure. Focusing on steady state flows, we delineate in param...

Due to the unlicensed nature of 2.4 GHz ISM band, the number of technologies using this band is growing. FCC regulations mandate that these technologies need to implement some form of frequency sharing. Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS) are two popular techniques to share the frequencies within this band. However, devices implementing different ...

We present a new method to detect duplicates used to merge different bibliographic record corpora with the help of lexical and social information. As we show, a trivial key is not available to delete useless documents. Merging heteregeneous document databases to get a maximum of information can be of interest. In our case we try to build a document corpus about the TOR molecule so as to extract...

Using coarse-grained membrane simulations we show here that peripheral membrane proteins can form a multitude of higher-order structures due to membrane-mediated interactions. Peripheral membrane proteins characteristically perturb the lipid bilayer in their vicinity which supports the formation of protein assemblies not only within the same but surprisingly also across opposing leaflets of a b...

PICSEL is a project 1 aiming at building information servers over existing information sources that are distributed and possibly heteregeneous. The approach which has been chosen in PICSEL is to deene an information server as a knowledge-based mediator in which carin is used as the core logical formalism to represent both the domain of application and the contents of information sources that ar...

Biomedical experiments generate a vast amount of data that needs to be organized, integrated and analyzed. Important research challenges in the retrieval of these data include flexible, integrated analysis of data held in existing heterogeneous data sources. Indeed, the problems of supporting ad hoc queries across multiple data sources and correlating the data retrieved pose a host of challengi...

In this paper, we describe the heterogeneous peer-to-peer infrastructure for sharing learning object. The POOL project builds on the three types of nodes: SPLASH is a freely downloadable application which allows individuals to create metadata and maintain their collection of learning objects, PONDs are bigger repositories of learning objects connected to the peerto-peer network and POOL Central...

Semantic heterogeneity has always been one of the most important problems to overcome. A number of systems have been proposed to address this problem, ranging from mediatorbased systems to description logic-based systems to content-descriptive metadata systems. In this paper, we propose an ontology-based metadata dictionary as a basis for solving semantic heterogeneity. First, the ontology-base...