Cost Effectiveness Analysis for Renewable Energy Sources Integration in the Island of Lemnos, Greece

The development of more efficient and least cost energy management interventions is of great importance for isolated energy systems. Islands are typical examples of isolated regions, often highly dependent on imported fossil fuels but with a significant and often unexploited Renewable Energy (RE) potential. This paper presents a least cost planning approach towards the integration of Renewable Energy Sources (RES) in such systems, which is applied to the island of Lemnos, Greece. The approach involves the application of Cost-Effectiveness Analysis (CEA) and Incremental Cost Analysis (ICA) for screening possible alternatives and determining the most economically efficient and effective plan for their implementation. The objective of the application of the proposed approach in the specific case study is to meet through the use of RE technologies all the additional electricity and thermal energy demand, compared to 2007. Various supply side options are evaluated, and an implementation plan is derived. The results indicate that the excess of both electricity and thermal energy demand can be met in the near future without any significant changes in existing infrastructure, while other options should be considered for a more extended time horizon

The Implementation of External Reference Pricing within and across Country Borders

An assessment of the way that 29 countries implement external reference pricing (ERP), which aims to contain medicine costs, using a systematic literature review-based process

Mining Service Abstractions (NIER Track)

International audienceSeveral lines of research rely on the concept of service abstractions to enable the organization, the composition and the adaptation of services. However, what is still missing, is a systematic approach for extracting service abstractions out of the vast amount of services that are available all over theWeb. To deal with this issue, we propose an approach for mining service abstractions, based on an agglomerative clustering algorithm. Our experimental ndings suggest that the approach is promising and can serve as a basis for future research

CoWSAMI: Interface-aware context gathering in ambient intelligence environments

International audienceNo abstrac

Cohesion-Driven Decomposition of Service Interfaces Without Access to Source Code

Software cohesion concerns the degree to which the elements of a module belong together. Cohesive software is easier to understand, test and maintain. Improving cohesion is the target of several refactoring methods that have been proposed until now. These methods are tailored to operate by taking the source code into consideration. In the context of service-oriented development, cohesion refers to the degree to which the operations of a service interface belong together. In this context, we propose an approach for the cohesion-driven decomposition of service interfaces. The very philosophy of services dictates that all that is exported by a service is the service specification. Hence, our approach for the cohesion-driven decomposition of service interfaces is not based on how the services are implemented. Instead, it relies only on information provided in the specification of the service interfaces. We validate the approach in 22 real-world services provided by Amazon and Yahoo. We show the effectiveness of the proposed approach, concerning the cohesion improvement and the size of the produced decompositions. Moreover, we show that the proposed approach is useful, by conducting a user study, where developers assessed the quality of the produced decompositions

Cohesion-Driven Decomposition of Service Interfaces without Access to Source Code

International audience—Software cohesion concerns the degree to which the elements of a module belong together. Cohesive software is easier to understand, test and maintain. In the context of service-oriented development, cohesion refers to the degree to which the operations of a service interface belong together. In the state of the art, software cohesion is improved based on refactoring methods that rely on information, extracted from the software implementation. This is a main limitation towards using these methods in the case of Web services: Web services do not expose their implementation; instead all that they export is the Web service interface specification. To deal with this problem, we propose an approach that enables the cohesion-driven decomposition of service interfaces, without information on how the services are implemented. Our approach progressive decomposes a given service interface into more cohesive interfaces; the backbone of the approach is a suite of cohesion metrics that rely on information, extracted solely from the specification of the service interface. We validate the approach in 22 real-world services, provided by Amazon and Yahoo. We assess the effectiveness of the proposed approach, concerning the cohesion improvement, and the number of interfaces that result from the decomposition of the examined interfaces. Moreover, we show the usefulness of the approach in a user study, where developers assessed the quality of the produced interfaces

Το διαδίκτυο στην Κύπρο 2010, Τελική Έκθεση

Για την αναπαραγωγή αυτής της έκθεσης σε κάθε άλλη μορφή πέραν της χρήσης συνοπτικών αποσπασμάτων απαιτείται ρητή γραπτή άδεια από το World Internet Project Cyprus.Χρηματοδοτούμενη από το ΤΕΠΑΚ, το δεύτερο κύμα της έρευνας «The Cyprus World Internet Project» διεξάχθηκε κατά το διάστημα Μάιος- Ιούνιος 2010 μέσω προσωπικών συνεντεύξεων ενός δείγματος 1000 ατόμων από την Ελληνοκυπριακή και 600 ατόμων από την Τουρκοκυπριακή κοινότητα. Το πρώτο κύμα της έρευνας πραγματοποιήθηκε το 2008 και αφορούσε μόνο τους Ελληνοκύπριους.Τεχνολογικό Πανεπιστήμιο Κύπρο

Integrated CHOReOS middleware - Enabling large-scale, QoS-aware adaptive choreographies

This document describes the final implementation and the evaluation of the CHOReOS middleware. Evaluation is achieved both via the use of the middleware on CHOReOS use-cases and via synthetic experiments and simulation. The conclusion was that the implementation of the CHOReOS middleware has achieved a good level of maturity for an open source project and it is ready to be used in real-world, complex choreographies

Final CHOReOS Architectural Style and its Relation with the CHOReOS Development Process and IDRE

This is Part b of Deliverable D1.4, which specifies the final CHOReOS architectural style, that is, the types of components, connectors, and configurations that are composed within the Future Internet of services, as enabled by the CHOReOS technologies developed in WP2 to WP4 and integrated in the WP5 IDRE. The definition of the CHOReOS architectural style is especially guided by the objective of meeting the challenges posed by the Future Internet, i.e.: (i) the ultra large base of services and of consumers, (ii) the high heterogeneity of the services that get composed, from the ones offered by tiny things to the ones hosted on powerful cloud computing infrastructures, (iii) the increasing predominance of mobile consumers and services, which take over the original fixed Inter- net, and (iv) the required awareness of, and related adaptation to, the continuous environmental changes. Another critical challenge posed by the Future Internet is that of security, trust and privacy. However, the study of technologies dedicated to enforcing security, privacy and trust is beyond the scope of the CHOReOS project; instead, state of the art technologies and possibly latest results from projects focused on security solutions are built upon for the development of CHOReOS use cases -if and when needed-. The CHOReOS architectural style that is presented in this deliverable refines the definition of the early style introduced in Deliverable D1.3. Key features of the CHOReOS architectural elements are as follows: (1) The CHOReOS service-based components are technology agnostic and allow for the abstraction of the large diversity of Future Internet services, and particularly traditional Business services as well as Thing-based services; a key contribution of the component formalization lies in the inference of service abstractions that allows grouping services that are functionally similar in a systematic way, and thereby contributes to facing the ULS of the Future Internet together with dealing with system adaptation through service substitution. (2) The CHOReOS middleware-layer connectors span the variety of interaction paradigms, both discrete and continuous, which are used in today's increasingly complex distributed systems, as opposed to enforcing a single interaction paradigm that is commonly undertaken in traditional SOA; a central contribution of the connector formalization is the introduction of a multi-paradigm connector type, which not solely allows having highly heterogeneous services composed in the Future Internet but also having those heterogeneous services interoperating even if based on distinct interaction paradigms. (3) The CHOReOS coordination protocols introduce the third and last type of architectural elements char- acterizing the CHOReOS style. They specifically define the structure and behavior of service-oriented systems within the Future Internet as the fully distributed composition of services, i.e., choreographies; the key contribution of the work lies in a systematic model-based solution to choreography realizability, which synthesizes dedicated coordination delegates that govern the coordination of services

Initial Architectural Style for CHOReOS Choreographies (D1.3)

While the development of CHOReOS systems build on well-known paradigms associated with service-oriented architectures (e.g., services, service bus and service choreography), the supporting architectural style re- quires accounting for the challenges posed by the future Internet, i.e., ultra large scale, high heterogeneity, increased mobility, and awareness & adaptability. This deliverable then revisits the traditional definitions of service-oriented component (i.e., service), connector (interaction protocol and related service bus for interop- erability) and configuration (system-wide architecture composing services according to orchestration or more general choreography patterns) to meet the FI challenges. Specifically, CHOReOS components enable lever- aging the diversity of Web-based services that integrate in the FI (i.e., WS∗ and RESTful web-based services, and from business to thing-based services) as well as the ultra large service base envisioned for the FI. As for CHOReOS connectors, they bring together the highly heterogeneous interaction paradigms that are now used in today's increasingly complex distributed systems and further support interoperability across heterogeneous paradigms. Finally, CHOReOS coordination protocols foster choreography-based coordination for the sake of scalability, while preventing undesired behavior (i.e., undesired service interactions that would violate the specified choreography). A key aspect of the proposed CHOReOS architectural style is to introduce novel ab- stractions for all its elements, which enable leveraging the wide diversity of the FI, in all the dimensions of scale, heterogeneity and mobility. The CHOReOS style further sets the base ground for the development (from design to implementation) of the CHOReOS Integrated Development and Runtime Environment, and especially for the specification and design of choreography-based systems (studied in WP2 complemented with WP4 work on Governance and V&V) and the development of the CHOReOS service-oriented middleware (studied in WP3)