Environmental monitoring and management systems in most cases deal with models and spatial analytics that involve the integration of in-situ and remote Geosensor observations. In-situ sensor observations and those gathered by remote sensors are usually provided by different databases and services in real-time dynamic services such as the Geo-Web Services. Thus, data have to be pulled from diffe...

Ubiquitous computing is an appealing research area today and most likely the future. It is about unobtrusive computer support of users in their everyday activities. This support is achieved by an omnipresence of computers and their ability to spontaneously form distributed computing systems, and to exchange and process information. Ambient Intelligence, which is an application of ubiquitous com...

Recent advances in Sensor Web geospatial data capture, such as high-resolution in satellite imagery and Web-ready data processing and modeling technologies, have led to the generation of large numbers of datasets from real-time or near real-time observations and measurements. Finding which sensor or data complies with criteria such as specific times, locations, and scales has become a bottlenec...

Dynamic discovery based on semantic description of services is an essential aspect of the Semantic Web services integration process. Since not all data required for service discovery can always be included in service descriptions, some data needs to be obtained during run-time. In this paper we define a model for service interface allowing required data to be fetched from the service provider d...

The advent of service-oriented architectures (SOAs) has strongly facilitated the development and deployment of large-scale distributed (serviceoriented) applications. The middleware for orchestrating process-based applications that consist of several distributed services has to be inherently distributed as well, in order to provide a high degree of scalability and to avoid a single point of fai...

In this paper, we present a middleware for dependable mobile systems and an experimentation platform for its evaluation. Our middleware is based on three original building blocks: a Proximity Map, a Trust and Cooperation Oracle, and a Cooperative Data Backup service. A Distributed Black-box application is used as an illustrative application of our architecture, and is evaluated on top of our mo...

Research into software architectures has traditionally addressed architecture description languages and architectural styles. The industrial focus is on middleware-based approaches to software architecture. Middleware is layered between applications and network operating systems and aims to resolve heterogeneity and distribution in a transparent way. We present an architectural style that integ...

The emergence of machine-to-machine (M2M) technologies as a business opportunity is based on the observation that there are many more machines and objects in the world than people and that an everyday object has more value when it is networked. In this paper, we describe an M2M middleware that we have developed for a facility management application. Facility management is a time and labour-inte...

The Internet of Things (IoT) is one the key components ICT infrastructure smart cities due to its great potential for intelligent management infrastructures and facilities enhanced delivery services in support sustainable cities. Smart typically rely on IoT, where a wide variety devices communicate with each other collaborate across heterogeneous distributed computing environments provide infor...