A Web-based Database System for Providing Technical Information on ATM Networking Platforms

This paper presents a Web-based database hosting technical information about pioneering ATM networking platforms, associated research activities engaging these platforms, and related important trials conducted in the framework of these research activities. The paper outlines the organisation and structure of the information content in the database and discusses methods of access through the WWW interface. Besides the “static” information offered by the database, other Java-based tools provide for the on-line monitoring of the status of the ATM platforms and for manipulating data arising from technological trials on these platforms. The integration of these tools with the database, under a common WWW interface is discussed

GREENET - An Early Stage Training Network in Enabling Technologies for Green Radio

International audienceIn this paper, we describe GREENET (an early stage training network in enabling technologies for green radio), which is a new project recently funded by the European Commission under the auspices of the 2010 Marie Curie People Programme. Through the recruitment and personalized training of 17 Early Stage Researchers (ESRs), in GREENET we are committed to the development of new disruptive technologies to address all aspects of energy efficiency in wireless networks, from the user devices to the core network infrastructure, along with the ways the devices and equipment interact with one another. Novel techniques at the physical, link, and network layers to reduce the energy consumption and carbon footprint of 4G devices will be investigated, such as Spatial Modulation (SM) for Multiple-Input-Multiple-Output (MIMO) systems, Cooperative Automatic Repeat reQuest (C-ARQ) protocols, and Network Coding (NC) for lossy networks. Furthermore, cooperation and cognition paradigms will be exploited as additional assets to improve the energy efficiency of wireless networks with the challenging but indispensable constraint of optimizing the system capacity without degrading the user's Quality-of-Service (QoS)

Process Integration of CO2 Methanation for Synthetic Natural Gas Production

In line with the vision of sustainable energy solutions and driven by a commitment to decarbonizing Shell’s energy products, the company is actively exploring the production of Synthetic Natural Gas (SNG) using eco-friendly methodologies. This initiative aligns with global ambitions to mitigate carbon footprints and resonate with the evolving EU regulatory environment.The study stresses two pivotal research areas:Renewable SNG Production: Focused on innovating low-carbon technologies, this segment delves into producing SNG through the integration of renewable CO₂ and green H₂ sources. The exploratory phase spans the complete production chain, right from harnessing renewable CO₂ from biomass-driven sources to the methanation process.SNG Liquefaction Challenges: A deeper probe into integrating the methanation process with SNG liquefaction, this segment emphasizes understanding the intricacies of introducing non-traditional components, notably H₂ and CO, into the liquefaction process. By employing sophisticated simulation tools, we've studied the potential implications on equipment and process efficiencies when integrating these new components.This study, enriched with a broad economic review, identifies optimal methodologies keeping in view economic feasibility, efficiency, and operational considerations. Through these research endeavors, Shell supports its commitment to pioneering sustainable energy solutions and provides a roadmap for future initiatives in the realm of SNG production

Analysis of the hidden and exposed terminal effects in wireless networks with cooperative ARQ

Cooperative Automatic Retransmission Request (C-ARQ) schemes allow those users which overhear a transmission to act as spontaneous relays when a packet has been received with errors at destination. When these users assist a source-destination pair in the retransmission process, the area exposed to the original transmission increases in comparison with non-cooperative ARQ schemes. In addition, the extension of the transmission time, due to the retransmissions, increases the vulnerability of a transmission to the hidden terminal problem. The paper provides a performance analysis of the hidden and exposed terminal effects in an 802.11-based wireless network where a C-ARQ scheme is executed at the Medium Access Control (MAC) layer. The presented analysis is supported by computer-based simulations.Peer Reviewe

Emerging Web-Based Services for Ship Travellers

In light of the fact that information communication technologies (ICTs) in general and the Internet/ WWW technology in particular are likely to soon accelerate penetration into the maritime market, bringing together innovative services, this article aims to identify a set of appealing Web-based services for ship travelers. To that end, the article uses a research methodology that includes three core research elements (i.e., Internet survey, questionnaires, and interviews). Our research highlights five state-of-the-art Web-based services (i.e., booking, schedule information, ship location, trip/port weather, and tourist information) that can be implemented by maritime transport operators (MTOs) and travel agencies (TAs). The added value nature of the proposed services could guarantee to their prospective implementers significant commercial advantages against their competitors. Demonstrating this business opportunity for MTOs and TAs, the article contributes towards the formation of new business models, which take into account the emerging maritime e-market