Abstraction layers have been widely used to increase the portability of a software system by hiding the implementation details of underlying resources (e.g., OS, hardware, and reusable libraries). Abstraction layers have also been adopted in Software Product Lines (SPLs), which assist in the creation of a family of products by reusing common core assets and managing variants in a family domain....

The majority of real-time multimedia traffic on the Internet is transported using the Transmission Control Protocol (TCP) or the User Datagram Protocol (UDP). Multimedia applications would benefit from a protocol that better supports their particular requirements, but transport layer ossification has limited the deployment of such protocols. This paper describes unordered time-lined TCP (uTLTCP...

Overlay networks are virtual networks formed by cooperating nodes that share an underlying physical network. They represent a flexible and deployable approach for applications to obtain new network semantics without modification of the underlying network, but they suffer from efficiency concerns. We present two router-based primitives that help end-hosts alleviate these inefficiencies. Packet R...

The ubiquity of IP technology is the starting-point to many current services, such as IPTV. Most of these services are supported in access network by xDSL networks (last mile), which are the service provider’s bottleneck. The main goal of this paper is to present a solution that adapts video contents to the xDSL networks. In order to provide clients with different video qualities according to t...

In this paper, we present a multi-formalism modeling framework (abbreviated by MFMF) for modeling and simulation. The proposed framework is defined based on the concepts of meta-models and uses object-orientation to overcome the complexities and to enhance the extensibility. The framework can be used as a basis for modeling by various formalisms and to support model composition in a unified man...

In this paper, a method for secondary structure with support vector machines is presented. The system used two layers of support vector machines, with a weighted cost function to balance the uneven class memberships. Using this method, prediction accuracy reaches 71.5%, comparable to the best techniques avaliable.

Polycrystalline MFI zeolite membranes were prepared on α-alumina tubular support by hydrothermal treatments at 413 K. The synthesized zeolite membranes were characterized by XRD, SEM and single gas permeation. The influence of hydrothermal treatment steps and the calcination time on the zeolite layer formation were investigated. MFI zeolite membrane prepared by four subsequent hydrothermal ...