Extension of the grid method to large displacements

International audienc

Etude du phénomène d'instabilité dans les structures cristallines en emboutissage et laminage.

International audienc

Telecom Software, Network Virtualization, and Software Defined Networks

The five articles in this special section focus on telecommunications software, network virtualization, and software defined networks. The increasingly relevant and transformational role that software and virtualization are gaining in the telecommunications field today enables unprecedented levels of abstraction, disaggregation, distribution, extensibility, slicing, and programmability in network infrastructures and services. Software-based networking is radically changing the way communication infrastructures are designed, programmed, integrated, and operated, enabling rapid and innovative network functions and network services creation and deployment, and opening the door to a faster pace of innovation in the networking and ICT industry. Such transformation, referred to as "network softwarization," is propelled by the emergence of several network technologies and paradigms, like network programmability (NP), intent-based networking (IBN), multi-access edge computing (MEC), network slicing (NS), software defined networking (SDN), and network function virtualization (NFV), which are gaining traction in production environments, and are bound to be core technologies of the maturing 5G and beyond networks. However, there are still several daunting challenges that need to be addressed before "telecom software" solutions fully leverage these technologies and become mature enough to be widespread and adopted by the industry

Autonomous solar powered membrane distillation systems: State of the art

Being a basic element for the every existence of any form of life on earth, water is one of the most abundant resources on earth, covering three-fourth of the planet’s surface. However, there is a shortage of freshwater in many areas worldwide. Desalination seems to be the most suitable solution. Major conventional desalination processes, such as distillation and reverse osmosis, consume a large amount of energy derived from oil and natural gas as heat and electricity, which is responsible for harmful CO2 emission. Solar desalination has emerged as a promising renewable energy-powered technology for producing freshwater. Solar membrane distillation (MD) is the best option in decentralized regions with scattered population and lack of infrastructures jointly with hard climate conditions make it difficult or at least not cost-effective to scale down bigger desalination technologies, such as RO or MSF, designed for very big water productions. Moreover, MD compared to conventional thermal desalination is less demanding regarding vapor space and building material’s quality leading to potential lower construction costs. The aim of this paper is to present the state-of-the-art review of developments in solar MD technology. In this review, membrane configurations, module design, and recent applications of this technology were discussed in detail

Experimental parametric study of membrane distillation unit using solar energy

Solar distillation is a promising method for the supply of freshwater to rural communities because water is a vital factor for the survival of humans. Therefore potable water demand is increasing continuously because of the industrial, population and, fast agricultural applications. Nowadays, different techniques for water purification have been created to provide freshwater from salty and polluted water such as solar distillation method to distill brackish/saline water. This work presents an experimental study of the solar membrane distillation unit which is coupled with direct contact membrane (DCMD) which located at Kairouan University. The system is installed as part of a cooperation project research and development between Tunisian Electromechanical Systems Laboratory and German Institute for Solar Energy Systems entitled: Solar driven membrane distillation for resource efficient desalination in remote areas. For the heating of the hot feed water stream, a heat exchanger is included which can be operated with any external heat supply between 60 and 80 °C. For the cooling of the cold feed water stream, no heat exchanger is included. The cooling can be provided over the intake of cold feed water. The effect of solar irradiation and all temperature on the journal productivity of the unit has been presented

Cloud futurology

The cloud has become integral to most Internet-based applications and user gadgets. This article provides a brief history of the cloud and presents a researcher's view of the prospects for innovating at the infrastructure, middleware, and applications and delivery levels of the already crowded cloud computing stack