Software architecture is becoming essential for the development and maintenance of distributed systems. It provides the concept of style, which refers to systems with similar features. CORBA systems share a common framework, so they can be described as conforming such a style. This paper gives a first step towards its formalization, by giving a comparison of the concepts of component and descri...

Distributed Internet-Based Performance Support Environment for Individualized Learning (DIPSEIL, http://env.dipseil.net/v3 )software model and software architecture. This paper describes the model, software architecture and integration with remote labs for building distributed information learning environment from several servers spread all over Europe with educational content, based on perform...

A complete speciication of a distributed software architecture describes two diierent aspects. First, it decomposes the software into its components and their in-terconnection. Second, it speciies the policies that are required to manage an architecture. Such policies are dependent on the nature of the execution environment. They are complicated by requirements such as heteroge-niety, availabil...

Runtime models play a critical role in modern self-adaptive systems. Hence, runtime architectural models are needed when making adaptation decisions in architecture-based self-adaptive systems. However, when these systems are distributed and highly dynamic, there is an added need to discover the systems software architecture model at runtime. Current methods of runtime architecture discovery ta...

In today's eld of distributed software architectures there is a need for environments allowing the easy development of applications consisting of heterogeneous software modules and having various Quality of Service requirements (e.g., timeliness, availability or security). System customization using middleware-services is a promising solution to deal with the coexistence of multiple application...

In today's eld of distributed software architectures there is a need for environments allowing the easy development of applications consisting of heterogeneous software modules and having various Quality of Service requirements (e.g., timeliness, availability or security). System customization using middleware-services is a promising solution to deal with the coexistence of multiple application...

The requirements that force decisions towards building distributed system architectures are usually of non-functional nature. Scalability, openness, heterogeneity, and fault-tolerance are examples of such non-functional requirements. The current trend is to build distributed systems with middleware, which provide the application developer with primitives for managing the complexity of distribut...

This paper describes the implementation of RTI-Kit, a modular software package to realize runtime infrastructure (RTI) software for distributed simulations such as those for the High Level Architecture. RTI-Kit software spans a wide variety of computing platforms, ranging from tightly coupled machines such as shared memory multiprocessors and cluster computers to distributed workstations connec...

In distributed and mobile environments, the connections among the hosts on which a software system is running are often unstable. As a result of connectivity losses, the overall availability of the system decreases. The distribution of software components onto hardware nodes (i.e., deployment architecture) may be ill-suited for the given target hardware environment and may need to be altered to...

A distributed multistage software router (MSSR) is composed by several interconnected software routers running on personal computers (PCs). The MSSR architecture overcomes scalability and performance issues of single software router by providing parallel forwarding paths. Like many networking devices, a MSSR must be sized for peak traffic load, which implies energy inefficiency at low loads. Th...