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Service-based access models coupled with recent advances in application deployment technologies can support emerging dynamic and data-driven applications. However, due to evolving application requirements and the dynamicity of the underlying resources, it is necessary to support flexible and opportunistic composition of services in order to satisfy application needs. The goal of this work is to provide...
In Software Defined Networks (SDN), intensive traffic monitoring is used to optimize the Quality-of-Service (QoS) of the network paths which are selected. Thus, we introduce the use of the Cognitive Packet Network (CPN) algorithm to SDN in order to optimize the search for new high-QoS paths. We install the CPN algorithm in the Cognitive Routing Engine (CRE), a new application software for SDN, and...
In this paper we propose a flexible and scalable distributed storage framework called flex Store that can adapt to variations in available or consumable power and demonstrate its performance in the context of reduplicated virtual machine disks. We propose and investigate smart control techniques in order to cope with the power constraints either introduced as a result of increasing node density in...
Quantifying and measuring Quality of Experience (QoE) are important and difficult concerns in Human Computer Interaction (HCI). Quality of Service (QoS) and the actual User Interface (UI) of the application are both important contributors to the QoE of a user. This paper describes a framework that measures accurately the way a user uses the UI in order to model users' behaviors and profiles. It monitors...
In the research of composite service execution, runtime QoS ensuring of composite service is an important problem in composite service adaptation. This paper gives an introduction to the design and implementation of composite service adaptive execution supported environment monitoring system, analyzes the crucial problem of the system, builds up an experiment environment to test the monitoring system...
Service composition is a well-established field of research in the service community. Services are commonly regarded as black boxes with well-defined interfaces that can be recursively aggregated into new services. The black-box nature of services does not only include the service implementation but also the middleware and hardware to run the services. Thus, service composition techniques are typically...
Ubiquitous computing environments are becoming more heterogeneous and highly dynamic. Systems need to dynamically self-adapt in order to accommodate dynamically changing resources, needs of different users and failure events. This paper focuses on the runtime adaptation mechanisms that need to be dealt with the distributed nature of systems and the heterogeneity of the environment. We tackle the problem...
This paper presents a middleware that aims to respond to the increasing management needs of networked sensing devices, such as remote software deployment, dynamic configuration and real-time performance monitoring and tuning. These are essential functions for building adaptable systems providing high quality of service. Furthermore, autonomic management bears particular importance for large scale...
The context-aware computing is a research field that defines systems capable of adapting their behavior according to any relevant information about entities (e.g.,people, places and objects) of interest. The ubiquitous computing is closely related to the use of contexts, since it aims to provide personalized, transparent and on-demand services. Ubiquitous systems are frequently shared among multiple...
For fulfilling the STCW95 Convention and extending training facilities, QOSMC (Qingdao Ocean Shipping Mariners College, R. P. China) has recently developed a new type of engine control system at its marine training center. This paper will introduce the use of IT, such as VB, database network and Internet technologies, for developing an engine control system. An innovative design of integrating marine...
Service-oriented system quality is not just a function of the quality of a provided service, but the interdependencies between services, the resource constraints of the runtime environment and network outages. This makes it difficult to anticipate how the consequences of these factors might influence system behaviour, which in turn makes it difficult to specify the right system environment in advance...
This paper provides following three contributions to the study of developing and applying model driven engineering (MDE) techniques to quality of service (QoS) configuration of distributed real-time and embedded (DRE) systems. First, we describe the challenges associated with mapping domain-level QoS policies of DRE systems to middleware configuration space. Second, we discuss a domain specific modeling...
This is an introduction to the proceedings of the MWS 2007 workshop held at EDOC 2007. It first explains the motivation for and background of the workshop. Then, it contains a short description of the keynote, each long and short peer-reviewed paper, and the discussion session "impact of various execution environments on middleware for web services". After the closing statements, MWS 2007...
Current fashion systems to interconnect large software architectures are moving toward SOA based solutions. This new paradigm for designing system can be improved, in our opinion, by using semantics. Semantics can a play a main role in boosting interoperability thanks to current technologies to express knowledge and to describe semantic Web services (SWS). This paper tackles the provision of a Software...
Self-adaptive systems are capable of changing their behaviour at runtime to meet target constraints. An important research question is how quality of service models can inform runtime adaptation. We sketch one solution to this question by application of control theory to improve performance of queued systems by means of architectural adaptation. Previous research by our group has shown how Auto Regressive...
The Manufacturing Grid (MG) workflow can be defined as a composition of manufacturing activities which execute on heterogeneous and distributed manufacturing resources in a virtual organization to accomplish a specific goal. This paper will describe an MG workflow management system with intelligent, multi-agent support in a dynamic Web environment. Intelligent agents work together individually and...
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