Business analytics in industry 4.0: a systematic review

Recently, the term “Industry 4.0” has emerged to characterize several Information Technology and Communication (ICT) adoptions in production processes (e.g., Internet-of-Things, implementation of digital production support information technologies). Business Analytics is often used within the Industry 4.0, thus incorporating its data intelligence (e.g., statistical analysis, predictive modelling, optimization) expert system component. In this paper, we perform a Systematic Literature Review (SLR) on the usage of Business Analytics within the Industry 4.0 concept, covering a selection of 169 papers obtained from six major scientific publication sources from 2010 to March 2020. The selected papers were first classified in three major types, namely, Practical Application, Reviews and Framework Proposal. Then, we analysed with more detail the practical application studies which were further divided into three main categories of the Gartner analytical maturity model, Descriptive Analytics, Predictive Analytics and Prescriptive Analytics. In particular, we characterized the distinct analytics studies in terms of the industry application and data context used, impact (in terms of their Technology Readiness Level) and selected data modelling method. Our SLR analysis provides a mapping of how data-based Industry 4.0 expert systems are currently used, disclosing also research gaps and future research opportunities.The work of P. Cortez was supported by FCT - Fundação para a Ciência e Tecnologia within the R&D Units Project Scope: UIDB/00319/2020. We would like to thank to the three anonymous reviewers for their helpful suggestions

Application de SMC pour l'analyse du comportement des capteurs

International audienc

Stable marriage matching for homogenizing load distribution in cloud data center

Running a sheer virtualized data center with the help of Virtual Machines (VM) is the de facto-standard in modern data centers. Live migration offers immense flexibility opportunities as it endows the system administrators with tools to seamlessly move VMs across physical machines. Several studies have shown that the resource utilization within a data center is not homogeneous across the physical servers. Load imbalance situations are observed where a significant portion of servers are either in overloaded or underloaded states. Apart from leading to inefficient usage of energy by underloaded servers, this might lead to serious QoS degradation issues in the overloaded servers. In this paper, we propose a lightweight decentralized solution for homogenizing the load across different machines in a data center by mapping the problem to a Stable Marriage matching problem. The algorithm judiciously chooses pairs of overloaded and underloaded servers for matching and subsequently VM migrations are performed to reduce load imbalance. For the purpose of comparisons, three different greedy matching algorithms are also introduced. In order to verify the feasibility of our approach in real-life scenarios, we implement our solution on a small test-bed. For the larger scale scenarios, we provide simulation results that demonstrate the efficiency of the algorithm and its ability to yield a near-optimal solution compared to other algorithms. The results are promising, given the low computational footprint of the algorithm

The political economy of greek policing:Between neo-liberalism and the sovereign state

This article interrogates historical developments, modern structures and future trends in Greek policing from the viewpoint of contemporary neo-liberal policing and social theory. We argue throughout this article that although neo-liberal thinking has indeed recently crept into the rhetoric and logics of Greek governance, the particular social, geographical and political history of the Hellenic Republic has muted these tendencies significantly for policing. Rather than reflecting changes toward post-Keynesian or postmodern policing, Greece (and Greek policing) is confronted by the basic modernist dilemma of ensuring state integrity both physically in the material military security of its borders and vast coastline, and ideologically in the battle for establishing public trust in the efficiency and effectiveness of government. This article analyzes relevant statutes and offers data on the growth of the Greek police and the relatively small private security sector. We conclude that while it is tempting to point to Greece as an exception to the general theoretical maxim that the provision of policing is fragmenting and de-centring as the state is shrinking, there are more and more examples of the recrudescence, re-emergence and continuing central relevance of the state for security provision in other national contexts