A microsegregation model, based on a boundary layer concept, is proposed for solidification of alloys. The model is derived by considering finite-rate solute diffusion both in the liquid and in the solid. A solutal Fourier number is used to characterize the extent of finite-rate solute diffusion in the liquid phase ahead of the moving solid/liquid interface. This new parameter is the liquid cou...

Sound-quality is a complex and multi-layered phenomenon [1]. When analysing or modelling the formation process of sound-quality judgements, a variety of quality elements and quality features [2] have to be taken into account, whereby the actual relevance and salience of each of them is situation dependent. In this paper, we present some ideas with the aim of structuring the quality-formation pr...

The emergence of WiMAX has attracted significant interests from all the fields of wireless communications including students, researchers, systems engineers and operators. WiMAX has been tipped to bring a revolution in the way we use broadband services today. The WiMAX can also be considered to be the main technology in the implementation of other networks like wireless sensor networks. Develop...

Recent empirical studies using large-scale data sets have validated the Granovetter hypothesis on the structure of the society in that there are strongly wired communities connected by weak ties. However, as interaction between individuals takes place in diverse contexts, these communities turn out to be overlapping. This implies that the society has a multilayered structure, where the layers r...

Within trie boundary-layer model and by taking into account only interface kinetics (isotropic or anisotropic), we find a contmuous set of « kinetic » dendrites. This solution exists at arbitrary supercooling A in the 2Dand 3D-axisymmetric cases and reduces to the usual dendrites with parabolic tails at A ~ l, and « angular » dendrites at A ~ l. In contrast with classical Ivantsov dendrites, th...

Increasing popularity of decentralized Peer-to-Peer (P2P) architecture emphasizes on the need to come across an overlay structure that can provide efficient content discovery mechanism, accommodate high churn rate and adapt to failures in the presence of heterogeneity among the peers. Traditional p2p systems incorporate distributed client-server communication, which finds the peer efficiently t...

The FlexRay standard, developed by a cooperation of leading companies in the automotive industry, is a robust communication protocol for distributed components in modern vehicles. In this paper, we present the first timed automata model of its physical layer protocol, and we use automatic verification to prove fault tolerance under several error models and hardware assumptions. The key challeng...

While the development of Organizational Memory (OM) has become common, the evaluation of these initiatives is yet a challenge. There are several reasons for this. On the one hand, there are various OM realizations possible. On the other hand, there is a lack of evaluation methodologies. We suggest the KnowledgeEco ontology-based methodology as an evaluation tool for OMs in organizations. Drawin...

Physical Layer Model Design for Wireless Networks. (August 2006) Yi Yu, B.S., Southeast University; M.S., Southeast University Chair of Advisory Committee: Dr. Scott L. Miller Wireless network analysis and simulations rely on accurate physical layer models. The increased interest in wireless network design and cross-layer design require an accurate and efficient physical layer model especially ...