389 research outputs found
OpenKnowledge at work: exploring centralized and decentralized information gathering in emergency contexts
Real-world experience teaches us that to manage emergencies, efficient crisis response coordination is crucial; ICT infrastructures are effective in supporting the people involved in such contexts, by supporting effective ways of interaction. They also should provide innovative means of communication and information management. At present, centralized architectures are mostly used for this purpose; however, alternative infrastructures based on the use of distributed information sources, are currently being explored, studied and analyzed. This paper aims at investigating the capability of a novel approach (developed within the European project OpenKnowledge1) to support centralized as well as decentralized architectures for information gathering. For this purpose we developed an agent-based e-Response simulation environment fully integrated with the OpenKnowledge infrastructure and through which existing emergency plans are modelled and simulated. Preliminary results show the OpenKnowledge capability of supporting the two afore-mentioned architectures and, under ideal assumptions, a comparable performance in both cases
Elastic Business Process Management: State of the Art and Open Challenges for BPM in the Cloud
With the advent of cloud computing, organizations are nowadays able to react
rapidly to changing demands for computational resources. Not only individual
applications can be hosted on virtual cloud infrastructures, but also complete
business processes. This allows the realization of so-called elastic processes,
i.e., processes which are carried out using elastic cloud resources. Despite
the manifold benefits of elastic processes, there is still a lack of solutions
supporting them.
In this paper, we identify the state of the art of elastic Business Process
Management with a focus on infrastructural challenges. We conceptualize an
architecture for an elastic Business Process Management System and discuss
existing work on scheduling, resource allocation, monitoring, decentralized
coordination, and state management for elastic processes. Furthermore, we
present two representative elastic Business Process Management Systems which
are intended to counter these challenges. Based on our findings, we identify
open issues and outline possible research directions for the realization of
elastic processes and elastic Business Process Management.Comment: Please cite as: S. Schulte, C. Janiesch, S. Venugopal, I. Weber, and
P. Hoenisch (2015). Elastic Business Process Management: State of the Art and
Open Challenges for BPM in the Cloud. Future Generation Computer Systems,
Volume NN, Number N, NN-NN., http://dx.doi.org/10.1016/j.future.2014.09.00
Analysis and Classification of Service Interactions for the Scalability of the Internet of Things
Scalability is an important concern for Internet of Things (IoT) applications since the amount of service interactions may become overwhelming, due to the huge number of interconnected nodes. In this paper, we present an IoT scenario for real-time Electrocardiogram (ECG) monitoring, in order to analyze how well different kinds of service interactions can fulfill the scalability requirements of IoT applications
P2P and SOA architecture for digital libraries
Doutoramento em Engenharia InformáticaIn an information-driven society where the volume and value of produced and
consumed data assumes a growing importance, the role of digital libraries
gains particular importance. This work analyzes the limitations in current digital
library management systems and the opportunities brought by recent
distributed computing models.
The result of this work is the implementation of the University of Aveiro
integrated system for digital libraries and archives. It concludes by analyzing
the system in production and proposing a new service oriented digital library
architecture supported in a peer-to-peer infrastructureNuma sociedade em que o volume e o valor da informação produzida e
disseminada tem um peso cada vez maior, o papel das bibliotecas digitais
assume especial relevo. O presente trabalho analisa as limitações dos actuais
sistemas de gestão de bibliotecas digitais e as oportunidades criadas pelos
mais recentes modelos de computação distribuída.
Deste trabalho resultou a implementação do sistema integrado para bibliotecas
e arquivos digitais da Universidade de Aveiro. Este trabalho finaliza
debruçando-se sobre o sistema em produção e propondo uma nova
arquitectura de biblioteca digital sustentada numa infrastrutura peer-to-peer e
orientada a serviços
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