Search results for "Virtual"
showing 10 items of 1485 documents
Integration of distributed energy systems in micro-grid architecture for making a virtual power plant
2015
This paper presents a novel concept for increasing the penetration level of distributed renewable energy systems into the main electricity grid. When increasing the renewable energy penetration, it is important to implement the frequency based power delivery in distributed generators and work as traditional synchronous generators. This can be achieved by improving the power processing unit of each renewable generation units to work as active generators. But in existing grid architecture, the grid frequency is controlled as one common variable over the electricity grid. With such a method, it is difficult to use frequency based power sharing in small distributed generators and participate in…
Mobile Edge Computing: Architetture ed Analisi della Live Migration
2020
Con l'ormai prossima rete mobile 5G entreranno a far parte della nostra quotidianità nuovi servizi applicativi, mai prima possibili, grazie all'avvicinamento di risorse di calcolo e di memoria nei pressi dell'utente in mobilità. Un’architettura abilitante i futuri servizi è quella di Mobile Edge Computing (MEC) in cui cloud di capacità inferiori rispetto a quelli presenti nella core della rete sono dislocati nei pressi della stazioni radio e metteranno a disposizione risorse di calcolo tali da permettere, tramite la tecnica di offloading, la fruizione di servizi quali realtà aumentata, gaming online, contenuti streaming ad alta risoluzione ed operazioni di data analytics. Ogni nuovo paradig…
System aspects of sharing a virtual reality
1998
We have recently held the second annual "System Aspects of Sharing a Virtual Reality" workshop, in conjunction with CVE '98 (see report in this issue). The single-day format allowed for twelve presentations plus discussion, which are summarized below. The topics addressed were: designing systems to cope with network limitations; managing communication and information; the construction of systems and toolkits; issues of presentation and user interaction; and application development and evaluation.
Digital Technologies for Cultural Heritage Preservation. A case study.
2014
Within the study and knowledge of Cultural Heritage, the Virtual Restoration represents an innovative technical-scientific sector that involves the use of Information and Communications Technologies (ICT) within traditional and well-established methodologies. The study illustrates a practical experience carried out on a cycle of sculptural works made in stucco that currently shows a number of fragmentary and disjointed parts. In this research a methodological approach is described, whose aim was to build a 3D model and formulate an hypothesis of virtual recomposition of the fragments. In addition, it provided useful geometrical-formal support tools both for the physical-material restoration…
Nonlocal Elastic-Damage Models
2014
A theory of nonlocal isotropic damage for elastic quasi-brittle materials is presented under the assumption of isothermal conditions and small deformations. Key ingredients of this theory are a self-adjoint (regularization) operator which transforms a local field into a related nonlocal one while preserves uniform fields and a free energy which depends on the strain and (linearly) on the nonlocal damage variable, as well as on an (scalar) internal variable accounting for the damage hardening. The relevant thermodynamic restrictions on the constitutive equations are obtained by means of two alternative procedures, one based on the principle of virtual power and the other on the concept of “n…
Intelligent learning environment for better student’s academic performance
2021
In this paper, the authors aim to develop an intelligent learning environment model designed to improve students’ academic performance. Methodology: Referring to the litarature, the authors identified and analyzed a number of relevant issues that influence the specific components of an intelligent learning environment. These aspects were quantified using performance indicators defined on the basis of the specific objectives of each aspect chosen. Results: Following the analysis, the authors developed a model of intelligent learning space, and for its representation, we used conceptual modeling. Conclusions: Finally, the authors propose the prevalidation of the model using the dynamic modeli…
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…
Co-design of a Virtual Training Tool with Emergency Management Stakeholders for Extreme Weather Response
2018
Emergency services usually prepare for the most frequent or predictable types of disasters, such as fires. However, preparation for complex, unpredictable disaster scenarios is infrequent, probably because of high resource demand and difficulty of covering dynamic training needs of multiple stakeholders. The use of serious game techniques as the core of simulated or virtual training tools opens for new ways of training and learning in emergency and crisis scenarios. However, the number of virtual training tools customized to specific disaster or crisis scenario that address needs of diverse user groups is limited. Existing tools are often tailored with a particular geographical setting and …
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…
Value co-creation process and measurement in 4.0 SMEs: An exploratory research in a B2B marketing innovation context
2021
The purpose of this exploratory research is to contribute to the lack of empirical research exploring techniques and protocols that can be used to measure the level of value obtained from using these technologies in the various marketing processes and in a business-to-business (B2B) context. By doing so, firms operating in fast changing dynamic environments can develop the right means to continuously adapt, integrate, reconfigure, and redeploy resources and capabilities to become more competitive and disruptive in their offerings. The phenomenon of interest is described by applying a case study qualitative approach to three 4.0 companies which use virtual reality (VR)/augmented reality (AR)…