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2021 Conference article Open Access OPEN

Inter-operability and Orchestration in Heterogeneous Cloud/Edge Resources: The ACCORDION Vision
Korontanis I., Tserpes K., Pateraki M., Blasi L., Violos J., Ferran D., Marin E., Kourtellis N., Coppola M., Carlini E., Ledwo? Z., Tarkowski P., Loven T., González Rozas Y., Kentros M., Dodis M., Dazzi P.
This paper introduces the ACCORDION framework, a novel frame- work for the management of the cloud-edge continuum, targeting the support of NextGen applications with strong QoE requirements. The framework addresses the need for an ever expanding and het- erogeneous pool of edge resources in order to deliver the promise of ubiquitous computing to the NextGen application clients. This endeavor entails two main technical challenges. First, to assure interoperability when incorporating heterogeneous infrastructures in the pool. Second, the management of the largely dynamic pool of edge nodes. The optimization of the delivered QoE stands as the core driver to this work, therefore its monitoring and modelling comprises a core part of the conducted work. The paper discusses the main pillars that support the ACCORDION vision, and provide a description of the three planned use case that are planned to demonstrate ACCORDION capabilities.Source: FRAME'21 - 1st Workshop on Flexible Resource and Application Management on the Edge, Virtual Event, Sweden, 25/06/2021
DOI: 10.1145/3452369.3463816
Project(s): ACCORDION via OpenAIRE, ACCORDION via OpenAIRE

See at: ISTI Repository Open Access | CNR ExploRA Open Access | ZENODO Open Access


2021 Conference article Open Access OPEN

Latency Preserving Self-optimizing Placement at the Edge
Ferrucci L., Mordacchini M., Coppola M., Carlini E., Kavalionak H., Dazzi P.
The Internet is experiencing a fast expansion at its edges. The wide availability of heterogeneous resources at the Edge is pivotal in the definition and extension of traditional Cloud solutions toward supporting the development of new applications. However, the dynamic and distributed nature of these resources poses new challenges for the optimization of the behaviour of the system. New decentralized and self-organizing methods are needed to face the needs of the Edge/Cloud scenario and to optimize the exploitation of Edge resources. In this paper we propose a distributed and adaptive solution that reduces the number of replicas of application services that are executed throughout the system, all the while ensuring that the latency constraints of applications are met, thus allowing to also meet the end users' QoS requirements. Experimental evaluations through simulation show the effectiveness of the proposed approach.Source: FRAME'21 - 1st Workshop on Flexible Resource and Application Management on the Edge, Virtual Event, Sweden, 25/06/2021
DOI: 10.1145/3452369.3463815
Project(s): ACCORDION via OpenAIRE, ACCORDION via OpenAIRE

See at: ISTI Repository Open Access | CNR ExploRA Open Access | ZENODO Open Access


2021 Conference article Restricted

An Osmotic Ecosystem for Data Streaming Applications in Smart Cities
Carlini E., Carnevale L., Coppola M., Dazzi P., Mencagli G., Talia D., Villari M.
Modern multi-tier Cloud-Edge-IoT computational platforms seamlessly map with the distributed and hierarchical nature of smart cities infrastructure. However, classical tools and methodologies to organise data as well as computational and network resources are poorly equipped to tackle the dynamic and heterogeneous environments of smart cities. In this paper we propose a reference architecture that aims to establish a unified approach for the orchestration of modern Cloud-Edge-IoT infrastructures and resources specifically tailored for data streaming applications in smart-cities. Stemming from the proposed reference architecture, we also discuss a series of open challenges, which we believe represent relevant research directions in the nearest future.Source: FRAME'21 - 1st Workshop on Flexible Resource and Application Management on the Edge, online, Sweden, 25/06/2021
DOI: 10.1145/3452369.3463822

See at: CNR ExploRA Restricted


2021 Report Open Access OPEN

ACCORDION D4.1 - Edge/Cloud continuum management framework report (I)
Taleb T., Violos J., Tsanakas S., Pagoulatou T., Theodoropoulos T., Coppola M., Dazzi P., Ferrucci L., Diego F., Marin E., Kourtelis N.
This deliverable provides the first report summarizing the scientific advancements, during the first year of the project, achieved by WP4 Tasks. Work Package (WP) 4, dubbed Edge/Cloud continuum management framework, is organized around 6 Tasks is to develop a framework that efficiently manages the deployment and runtime of ACCORDION applications on the continuum.Source: ISTI Project report, ACCORDION, D4.1, 2021
Project(s): ACCORDION via OpenAIRE

See at: ISTI Repository Open Access | CNR ExploRA Open Access


2021 Report Open Access OPEN

ACCORDION D7.2 - Dissemination & exploitation activities (I)
Tserpes K., Di Girolamo M., Violos J., Lipa B., Paterkai M., Loven T., Tarkowski P., Taleb T., Nadir Z., Kourtelis N., Schmidt S., Ferran D., Dazzi P., Rapisarda B., Coppola M., Vakalellis M.
ACCORDION project aims at unlocking the full potential of a big class of applications that are too latency- sensitive, or data-dependent, to be moved to the public cloud. ACCORDION couples efficient, decentralized and AI-based solutions for cloud and edge resource federation with novel approaches for application definition management and generation at runtime. This deliverable provides a broad overview of the communication, dissemination and exploitation activities implemented within the ACCORDION project within the first 18 months of the project and a detailed market analysis. A detailed exploitation strategy for the project, as well as exploitation plans for individual partners, was presented in the previous deliverable D7.1. Based on those plans, in this deliverable we carry out an evaluation of the ACCORDION project's dissemination and exploitation activities made so far.Source: ISTI Project report, ACCORDION, D7.2, 2021
Project(s): ACCORDION via OpenAIRE

See at: ISTI Repository Open Access | CNR ExploRA Open Access


2021 Conference article Restricted

TEACHING - Trustworthy autonomous cyber-physical applications through human-centred intelligence
Bacco M., Carlini E., Cassarà P., Coppola M., Dazzi P., Gotta A.
This paper discusses the perspective of the H2020 TEACHING project on the next generation of autonomous applications running in a distributed and highly heterogeneous environment comprising both virtual and physical resources spanning the edge-cloud continuum. TEACHING puts forward a human-centred vision leveraging the physiological, emotional, and cognitive state of the users as a driver for the adaptation and optimization of the autonomous applications. It does so by building a distributed, embedded and federated learning system complemented by methods and tools to enforce its dependability, security and privacy preservation. The paper discusses the main concepts of the TEACHING approach and singles out the main AI-related research challenges associated with it. Further, we provide a discussion of the design choices for the TEACHING system to tackle the aforementioned challenges.Source: IEEE COINS 2021: IEEE International Conference on Omni-layer Intelligent systems, Online conference, 23-26/08/2021
Project(s): TEACHING via OpenAIRE

See at: CNR ExploRA Restricted


2021 Conference article Open Access OPEN

Impact of network topology on the convergence of decentralized federated learning systems
Kavalionak H., Carlini E., Dazzi P., Ferrucci L., Mordacchini M., Coppola M.
Federated learning is a popular framework that enables harvesting edge resources' computational power to train a machine learning model distributively. However, it is not always feasible or profitable to have a centralized server that controls and synchronizes the training process. In this paper, we consider the problem of training a machine learning model over a network of nodes in a fully decentralized fashion. In particular, we look for empirical evidence on how sensitive is the training process for various network characteristics and communication parameters. We present the outcome of several simulations conducted with different network topologies, datasets, and machine learning models.Source: ISCC 2021 - 26th IEEE Symposium on Computers and Communications, Athens, Greece, 05-08/09/2021
Project(s): TEACHING via OpenAIRE

See at: ISTI Repository Open Access | CNR ExploRA Open Access


2020 Contribution to journal Restricted

Special Issue on High Performance Services Computing and Internet Technologies
Tserpes K., Dazzi P., Carlini E., Coppola M., Zissis D.
Source: Future generation computer systems 109 (2020): 642–643. doi:10.1016/j.future.2020.04.017
DOI: 10.1016/j.future.2020.04.017

See at: Future Generation Computer Systems Restricted | Future Generation Computer Systems Restricted | Future Generation Computer Systems Restricted | Future Generation Computer Systems Restricted | CNR ExploRA Restricted | www.sciencedirect.com Restricted


2020 Report Closed Access

ACCORDION D1.2 - Quality assurance plan
Coppola M, Carlini E., Dazzi P.
This Project Quality Plan shows how quality aspects are considered in a variety of processes and activities within the ACCORDION project. The interrelated quality processes - planning, assurance and control - have impact on the project work from its start to its end. o Quality planning refers to quality policies like meetings, deliverables or publication policies, the definition of responsibilities as well as to manage the processes, in conjunction with the tasks dealing with the impact maximization activities, for the creation of a project visual identity including a project logo, project-like designed templates, website etc. In order to communicate adequately within the project as well as to project external persons, several collaborative tools, such as project policies including meetings, minutes, deliverables and the publication process of scientific papers, are established and explained in this document. o Quality assurance involves the establishment of Interim Management Reports, clear responsibilities and regular, clearly guided teleconferences. A well-defined internal review process further supports the quality assurance of deliverables. The plan is effective throughout the lifetime of the project but is open to revision if necessary. Responsibilities for quality planning, assurance and control are shared between all partners, which allow various views on quality issues in order to reach the optimal outcome.Source: ISTI Project report, ACCORDION, D2.1, 2020
Project(s): ACCORDION via OpenAIRE

See at: CNR ExploRA Restricted


2020 Report Restricted

ACCORDION D2.1 - User requirements (I)
Carlini E., Coppola M, Dazzi P.
This deliverable provides a set of requirements of the ACCORDION project. This is a first iteration of the requirements collection process. This document is a fundamental pillar for the development of the whole architecture of the ACCORDION framework and provides requirements from both functional and non- functional sides, that are essential for the design and development of the ACCORDION framework. User requirements are listed in the table that will be the basis for further work. This document can be also considered as a checklist of the items that the consortium has to monitor, implement and evaluate during the project lifetime. In order to improve the quality of the presentation and thus ease the readability of the document, this deliverable summarizes the project's use cases (general summary and approach) and the ACCORDION platform requirements. The requirements are organized in three main categories: o General-purpose requirements: provided by the use case owners, are the key features of the NextGen applications shared by all the three use cases. o Use case related requirements: extracted by analysing the needs of the NextGen applications, filtered through technical and business-related criteria. o Technical/Scientific requirements: extracted from the use case related requirements and from the research goals of the project.Source: ISTI Project report, ACCORDION, D2.1, 2020
Project(s): ACCORDION via OpenAIRE

See at: CNR ExploRA Restricted


2020 Report Open Access OPEN

ACCORDION D7.1 - Dissemination & exploitation plan
Tserpes K., Kousiouris G., Di Girolamo M., Violos J., Lipa B., Pateraki M., Loven T., Tarkowski P., Taleb T., Bagaa M., Nadir Z., Kourtelis N., Zadtootaghaj S., Diego F., Dazzi P., Rapisarda B., Coppola M.
ACCORDION project aims at unlocking the full potential of a big class of applications that are too latency- sensitive, or data-dependent, to be moved to the public cloud. In particular, ACCORDION couples efficient, decentralized and AI-based solutions for cloud and edge resource federation with novel approaches for application definition management and generation at runtime. This deliverable provides the ACCORDION Dissemination and Exploitation plan. Exploitation activities seek to generate new revenue streams for consortium members by introducing new products and services to the market, increasing the market share of existing offerings, securing intellectual property rights through standardization, as well as reducing costs by adopting new processes. These gains can be enjoyed by a single beneficiary or shared among several ACCORDION partners. But in order for these benefits to materialize, selected pieces of information need to be disseminated to external parties that can influence the quality of ACCORDION outputs (such as the research community) or communicated with end users, the media and third parties (e.g., policy makers) in an easy-to-digest way. The ACCORDION dissemination, communication and exploitation plan has been broken down into three consecutive phases: a) the Development phase during the first 2 years of the project where all envisioned ACCORDION products will be specified, developed, integrated, validated and finetuned where necessary. Communication and dissemination will gradually evolve from explaining our vision and approach followed to results obtained and progress beyond the state-of-the-art. Exploitation activities will start with an initial market analysis for each ACCORDION asset/product for revealing end-users' pain points and technology gaps and evolve towards the preliminary formation of individual and joint exploitation plans by consortium members. b) the pre-commercialisation/"result wrap-up" phase during the last year of the project where maturity of ACCORDION outputs will increase and dissemination and communication strategy will continue to be results-oriented in order to stimulate further the market for ACCORDION platform. Regarding exploitation activities, consortium members will perform a techno-economic analysis for assessing the sustainability of individual and joint commercialization plans and discuss details about the business plan(s) to be followed. c) The commercialisation/"follow-up" phase that will commence at the end of the project and targets the launch of products and services based on ACCORDION results; most likely a subset of these as not all ACCORDION outputs are expected to be ready for prime time. This will allow European telecommunication operators, cloud and edge infrastructure providers, as well as service providers of any vertical industry and size, to capitalize on their local resource and other advanced technologies, such as 5G, for enhancing the quality of experience, cost effectiveness and security offered to end-users. To this end, the marketing and business development departments of consortium members, either individually or as part of a joint venture, will continue interacting with targeted audience and explore the path for future upgrades to those product offerings. For each of those phases we outline a set of clear activities and tools through which we will be able to interact with targeted stakeholder groups in an effective way. Acknowledging that ACCORDION members' business development departments, infrastructure providers, service providers in several vertical markets, end-users, policy makers, standardization bodies and research communities (including other research projects) have different backgrounds and objectives, separate (yet linked) strategies and roadmaps have been defined for dissemination, communication and exploitation purposes. Furthermore, a set of Key Performance Indicators (KPIs) has been defined for benchmarking these activities, as well as an approach utilizing internal tools for monitoring progress and taking corrective measures when necessary.Source: ISTI Project report, ACCORDION, D7.1, 2020
Project(s): ACCORDION via OpenAIRE

See at: ISTI Repository Open Access | CNR ExploRA Open Access


2019 Contribution to conference Open Access OPEN

Proceedings of the 15th International Conference on the Economics of Grids, Clouds, Systems, and Services (GECON 2018)
Coppola M., Carlini E., D'Agostino D., Altmann J., Banares J. A.
Welcome message for the 15th International Conference on the Economics of Grids, Clouds, Systems, and Services (GECON 2018).DOI: 10.1007/978-3-030-13342-9
DOI: 10.1007/978-3-642-35194-5

See at: ISTI Repository Open Access | link.springer.com Restricted | link.springer.com Restricted | link.springer.com Restricted | link.springer.com Restricted | link.springer.com Restricted | CNR ExploRA Restricted


2019 Dataset Unknown

BASMATI WiFi Localization Dataset
Altmann J., Aryal R. G., Carlini E., Cho C., Coppola M., Dazzi P., Haile N., Jung Y-w., Karaboga B., Kim S-w., Kim M., Koo W-bo., Lechler C., Lopez L., Marshall I. J., Marshall Clt., Marshall K., Pages E., Psomakelis E., Santoso G. Z., Schwichtenberg A., Sok S-w., Tserpes K., Varvarigou T., Violos I., Wacker R., Zylowski T.
This is a dataset that was created in the frame of the research project "BASMATI" an EU-funded research project (grant agreement no. 723131, website: http://www.basmati.cloud). It presents the Received Signal Strength Indicator (RSSI) of the smartphone WiFi transceivers of the attendants of a music festival in a specific day, as it was recorded by a number of WiFi access points. The dataset is comprised of two files: - BASMATI_lastday_RSSI.csv that lists the timestamped RSSI of mobile phones as it was received from the access points. - BASMATI_AccessPoints_locations.csv that lists the fixed locations of the access pointsProject(s): BASMATI via OpenAIRE

See at: CNR ExploRA | zenodo.org


2018 Contribution to book Open Access OPEN

BASMATI: Cloud Brokerage Across Borders for Mobile Users and Applications
Carlini E., Coppola M., Dazzi P., Tserpes K., Violos J., Jung Y. W., Santoso G. Z., Altmann J., Marshall J., Pages E., Kim M.
BASMATI aims at delivering an integrated platform that will support the dynamic needs of mobile applications and users through an end-to-end approach for cloud services. BASMATI will emphasize on enabling runtime adaptation of all assets, including user and application prediction models, federation patterns, resources and data management policies, brokerage and offloading decisions. BASMATI platform will coordinate all assets to react in response to real-world events in real-time.Source: Advances in Service-Oriented and Cloud Computing Workshops of ESOCC 2017, Oslo, Norway, September 27-29, 2017, Revised Selected Papers, edited by Zoltán Ádám Mann, Volker Stolz, pp. 181–186, 2018
DOI: 10.1007/978-3-319-79090-9_16
Project(s): BASMATI via OpenAIRE

See at: ISTI Repository Open Access | academic.microsoft.com Restricted | dblp.uni-trier.de Restricted | link.springer.com Restricted | link.springer.com Restricted | CNR ExploRA Restricted


2018 Report Open Access OPEN

BASMATI - D2.3 Global Architecture Design
Carlini E., Coppola M., Dazzi P., De Lira V. M., Schwichtenberg A., Wacker R., Lechler C., Kim M., Lee D. altmann J., Haile N., Al-athwari B. konstantinos Tserpes, John Violos, Vaggelis Psomakelis jamie Marshall young-woo Jung, Dongjae Kang, Sunwook Kim, Ganis Zulfa Santoso enric Pages, Ana Juan Ferrer
The ultimate goal of the architecture work package of BASMATI is to ensure that all consortium members have a common vision of the global architecture of the system and that all developers are aware of the interfaces exported by any architecture component to others. This deliverable defines the architecture of the BASMATI platform. Overall, the objective of the BASMATI project is to design, implement and evaluate a dynamic and integrated brokerage platform targeting federated clouds that supports the dynamic needs of mobile applications and users. To this end, the BASMATI architecture provides a common ground to address key technological and research challenges in different research fields. These challenges mainly focus on three core aspects: (i) User, application and situation modelling and understanding to drive application placement; (ii) Runtime adaptivity and reconfiguration; (iii) Brokering and Offloading of application and services. The resulting architecture is divided into layers, which stem from several choices taken at design time. The first choice is the separation in the management of those services that natively run on the server side from those that run on a client device. The second choice is to separate the computational plane (how computation is organized, what are the functional dependencies from the services composing the application) from the data plane, in order to foster advanced computation and data orchestration techniques. The last, and probably the most important choice, is the definition of a specific application model (which we refer to as BEAM) that encompasses all the many views of the application within the platform. Finally, the architecture defined in this document has also been designed to support the requirements identified at the beginning of the project, from the use cases, in accordance with both the joint Korean and European use cases' needs. A final version of this document was created at M18.Source: Project report, BASMATI, Deliverable D2.3, 2018
Project(s): BASMATI via OpenAIRE

See at: ISTI Repository Open Access | CNR ExploRA Open Access


2018 Report Open Access OPEN

BASMATI - D6.5 Use cases evaluation and recommendations
Schwichtenberg A., Kim S-w, Sok S-w, Tserpes K, Coppola M., Dazzi P.
In this document the evaluation methodology is described that will be applied in the BASMATI project in order to assess the quality of the BASMATI framework and its components. The evaluation execution is performed by running three use case demonstrators on a BASMATI, cloud federation platform. The results of the evaluation will be presented in this report.Source: Project report, BASMATI, Deliverable D6.5, 2018
Project(s): BASMATI via OpenAIRE

See at: ISTI Repository Open Access | CNR ExploRA Open Access


2017 Journal article Open Access OPEN

QoS-aware genetic Cloud Brokering
Anastasi G. F., Carlini E., Coppola M., Dazzi P.
The broad diffusion of Cloud Computing has fostered the proliferation of a large number of cloud computing providers. The need of Cloud Brokers arises for helping consumers in discovering, considering and comparing services with different capabilities and offered by different providers. Moreover, consuming services exposed by different providers may alleviate the vendor lock-in issue. While it can be straightforward to choose the best provider when deploying small and homogeneous applications, things get more challenging with large and complex applications. In this paper we propose QBROKAGE, a genetic approach for Cloud Brokering, aiming at finding Infrastructure-as-a-Service (IaaS) resources for satisfying Quality of Service (QoS) requirements of cloud applications. Our approach is capable of evaluating such requirements both for the single application service and for the application as whole. We performed a set of experiments with an implementation of such broker, by considering three-tier applications and scientific application workflows. Results show that our broker can find near-optimal solutions even when dealing with hundreds of providers, providing optimized deployment solutions that includes data transferring cost across multiple clouds.Source: Future generation computer systems 75 (2017): 1–13. doi:10.1016/j.future.2017.04.026
DOI: 10.1016/j.future.2017.04.026

See at: ISTI Repository Open Access | Future Generation Computer Systems Restricted | Future Generation Computer Systems Restricted | Future Generation Computer Systems Restricted | Future Generation Computer Systems Restricted | Future Generation Computer Systems Restricted | CNR ExploRA Restricted | Future Generation Computer Systems Restricted | www.sciencedirect.com Restricted


2017 Conference article Restricted

BASMATI: An architecture for managing cloud and edge resources for mobile users
Altmann J., Al-athwari B., Carlini E., Coppola M., Dazzi P., Ferrer A. J., Haile N., Jung Y. W., Marshall J., Pages E., Psomakelis E., Santoso G. Z., Tserpes K., Violos J.
The BASMATI architecture is designed to improve the service quality perceived by end-users. In particular, it focuses on the support of applications that offer services to mobile end-users, ranging from those crossing national borders to those roaming around locally and who both need access to widely dispersed cloud resources. To achieve this, the architecture of BASMATI is built around the concepts of cloud federation and offloading, embodying both heterogeneous resources of different cloud providers and various computational devices located at the edge of the network with different access policies. The BASMATI architecture leverages intelligent decision support for brokering resources, user mobility modeling, a highly reactive management of applications, and a business-oriented cloud federation logic, to drive the efficient and proactive allocation of services onto proper cloud resources. Within this paper, we describe the architectural requirements and the architecture, overview.Source: 14th International Conference on the Economics of Grids, Clouds, Systems, and Services, GECON 2017, pp. 56–66, Biarritz, France;, 19-21/09/2017
DOI: 10.1007/978-3-319-68066-8_5
Project(s): BASMATI via OpenAIRE

See at: academic.microsoft.com Restricted | dblp.uni-trier.de Restricted | doi.org Restricted | link.springer.com Restricted | link.springer.com Restricted | CNR ExploRA Restricted | rd.springer.com Restricted


2016 Conference article Open Access OPEN

Self-optimising Decentralised Service Placement in Heterogeneous Cloud Federation
Carlini E., Coppola M., Dazzi P., Mordacchini M., Passarella A.
Clouds have been relevant business drivers and computationalbackends for a wide range of applications, includingIoT, e-health, data analytics. To match the complex needs ofsuch comprehensive set of different kinds of applications, inrecent times there is an emerging need for new paradigmsand forms of Clouds, organised according to a federated, heterogeneousand distributed structure. To exploit heterogeneityand localisation, in order to enhance the overall performances,ensure energy efficiency, reduce costs for resource providers andin the meantime enhance the user experience, proper serviceplacement solutions are required. However, conducting efficientdeployments in such a scenario is complex due to the dynamicnature of applications, resources, users. As a consequence, therethe a need for scalable, distributed, adaptive, context-awaresolutions characterised by high-efficiency and reduced overhead.We propose a highly distributed, self-adaptive solution aimed atoptimising the overall deployment of cloud services by means ofpoint-to-point interactions occurring among clouds and cloudletsbelonging to the same federation. The contribution of this paperis the definition of a service exchange mechanism, its Markovchainbased modelling and thorough experimental evaluation.Source: SASO 2016 - 10th IEEE International Conference on Self-Adaptive and Self-Organizing Systems, pp. 110–119, Augsburg, Germany, 12-16 September 2016
DOI: 10.1109/saso.2016.17
Project(s): BASMATI via OpenAIRE

See at: ISTI Repository Open Access | puma.isti.cnr.it Open Access | academic.microsoft.com Restricted | dblp.uni-trier.de Restricted | ieeexplore.ieee.org Restricted | CNR ExploRA Restricted | xplorestaging.ieee.org Restricted


2016 Report Open Access OPEN

Challenges to be addressed for realising an ephemeral cloud federation
Carlini E., Coppola M., Dazzi P., Mordacchini M.
This paper sketches the challenges to address to realise a support able to achieve an Ephemeral Cloud Federation, an innovative cloud computing paradigm that enables the exploitation of a dynamic, personalised and context-aware set of resources. The aim of the Ephemeral Federation is to answer to the need of combining private data-centres with both federation of cloud providers and the resource on the edge of the network. The goal of the Ephemeral Federation is to deliver a context-aware and personalised federations of computational, data and network resources, able to manage their heterogeneity in a highly distributed deployment, which can dynamically bring data and computation close to the final user.Source: ISTI Technical reports, 2016

See at: ISTI Repository Open Access | CNR ExploRA Open Access