Search results for " computing"
showing 10 items of 2075 documents
Financial Evaluation of SLA-based VM Scheduling Strategies for Cloud Federations
2017
In recent years, cloud federations have gained popularity. Small as well as big cloud service providers (CSPs) join federations to reduce their costs, and also cloud management software like OpenStack offers support for federations. In a federation, individual CSPs cooperate such that they can move load to partner clouds at high peaks and possibly offer a wider range of services to their customers. Research in this area addresses the organization of such federations and strategies that CSPs can apply to increase their profit.In this paper we present the latest extensions to the FederatedCloudSim framework that considerably improve the simulation and evaluation of cloud federations. These si…
MAVIE-Lab Sports: a mHealth for Injury Prevention and Risk Management in Sport
2018
International audience; Smart-phones technology and the development of mHealth (Mobile Health) applications offer an opportunity to design intervention tools to influence health behavior changes. The MAVIE-Lab is a mHealth application including a DSS (Desicion Support System) to assist in the personalized evaluation of HLIs (Home, Leisure and Sport Injuries) risk and to promote the adoption of prevention measures. MAVIE-Lab Sports will be the first module of the mobile application. The purpose of this PhD project is to improve a particular module of MAVIE-Lab, devoted to sports (MAVIE-Lab Sports), in different aspects: statistical modeling, design and ergonomics. It also aims to evaluate sy…
Collaborative Business Model Innovation Process for Networked Services
2013
This paper presents a process framework for innovating joint business models (co-BM) for multiple companies. Our framework describes the change management that should be carried out in parallel to the rigorous analysis and development of the business model details. With two illustrative cases we show that fruitful co-BM creation process in networks requires both development of the model itself, but also organizational innovation processes including mutual learning and harmonisation of operations. We claim that by understanding this dual process and its key facets might help (1) to coordinate the practical BM creation projects better and (2) to analyse which BM related decisions contribute o…
Impact of Cloud Computing Technologies on Pricing Models of Software Firms – Insights from Finland
2014
In this paper we study the changes in the pricing models of software firms that use cloud computing technologies as part of their products and services. This paper presents findings from 324 responses to a questionnaire survey on how pricing model elements of software firms have changed as a result of adopting hardware virtualization, multi-tenancy, online delivery and configurability. The findings suggest that Software-as-a-Service firms – making use of the cloud computing technologies – are generally simplifying their pricing model, increasing the use of usage-based pricing, reducing the customers’ influence and unifying their pricing across customers. These changes occur together with st…
Creating Business Value from Cloud-Based ERP Systems in Small and Medium-Sized Enterprises
2019
Part 11: Modelling and Managing the Digital Enterprise; International audience; This qualitative study focuses on how small- and medium-sized enterprises (SMEs) can realize benefits and create information technology (IT) value by investing in cloud enterprise resource planning (ERP) systems. We interviewed 19 respondents from cloud providers and cloud clients and found that their SMEs experienced both benefits and challenges when implementing cloud ERP systems. The digital value was obtained through work process automatization, fast updates of system functionalities, enhanced security of data storage, and increased access to critical business data from multiple digital units. Challenges in …
Creating a sustainable digital infrastructure: The role of service-oriented architecture
2021
Abstract The United Nations’ goal of generating sustainable industry, innovation, and infrastructure is the point of departure for our reflective paper. The paper elaborates on the concepts of digital infrastructure, service-oriented architecture, and microservices. It emphasizes the benefits and challenges of creating a sustainable infrastructure based on a service-oriented environment, in which cloud services constitute an important part. We outline the prerequisites for obtaining a sustainable digital infrastructure based on services. Service-oriented architecture (SOA) and recently, microservice architecture, and cloud services, can provide organizations with the improved agility and fl…
Possibilistic Programming and Gas for Aggregate Production Planning under Vague Information
1999
In production planning activities, aggregate planning is surely the phase where the lack of information is more relevant. The reasons for that can be summarised in: a) the planning product is an aggregate one, very often not corresponding to actual products; b) the delay from the actual production is relevant so that information regarding actual production resources availability and performances are vague; c) the planning activity is often based on forecasts. On the other hand, all the subsequent production planning activities are based on the result of aggregate planning. In the paper a research going on at the Workgroup for Soft Computing Application in Manufacturing is presented. A Decis…
The RedTube copyright infringement affair in Germany: shame on who?
2015
Recently, tens of thousands of German Internet users were confronted with copyright infringement claims for allegedly watching porn clips on the streaming platform RedTube.com. The alleged copyright infringers received ‘Abmahnung’ cease and desist letters that gave them an opportunity to settle copyright infringements out of court by paying rights-holders €250 in compensation. While in cases relating to peer-to-peer file-sharing, the IP address of a peer can easily be identified,1 the RedTube case raises the question how consumers of a stream could be identified. In addition, it raises the question of whether the consumption of a stream is illegal under German law. Assuming that this is not…
Quantized Dissensus in switching networks with nodes death and duplication* *Research supported by MURST-PRIN “Robust Techniques for uncertain system…
2009
Abstract In this paper we discuss agents exchanging quantized flows to diverge one from the others according to a dissensus protocol. A Quantized Gossip algorithm is considered. Evolutions of the states during switching intervals and at switching instants and their property are described and analyzed. The modeling of switching systems describing networks where death and duplication processes occur is described. Some properties of the topology reached by the network when different rules of duplication and inheritance are implemented.
Performance Analysis of Synchronous Duty-Cycled MAC Protocols
2015
In this letter, we propose an analytical model to evaluate the performance of the S-MAC protocol. The proposed model improves the accuracy of previous models in two aspects. First, it incorporates the dependence among the nodes within a cluster by defining a DTMC that models the number of active nodes, whereas the previous models considered that nodes were mutually independent. Second, it proposes new methods for calculating packet delay and energy consumption. The analytical model is validated through discrete-event based simulations. Numerical results demonstrate that the proposed analytical model and methods yield accurate results under realistic assumptions