74 research outputs found
Adaptive load balancing routing algorithms for the next generation wireless telecommunications networks
No full textThis thesis was submitted for the degree of Doctor of Philosophy and was awarded by Brunel UniversityWith the rapid development of wireless networks, mesh networks are evolving as a new important technology, presenting a high research and commercial interest. Additionally, wireless mesh networks have a wide variety of applications, offering the ability to provide network access in both rural and urban areas with low cost of maintenance. One of the main functionalities of a wireless mesh network is load balancing routing, which is the procedure of finding the best, according to some criteria, routes that data need to follow to transfer from one node to another. Routing is one of the state-of-the-art areas of research because the current algorithms and protocols are not efficient and effective due to the diversity of the characteristics of these networks. In this thesis, two new routing algorithms have been developed for No Intra-Cell Interference (NICI) and Limited Intra-Cell Interference (LICI) networks based on WiMAX, the most advanced wireless technology ready for deployment. The algorithms created are based on the classical Dijkstra and Ford-Fulkerson algorithms and can be implemented in the cases of unicast and multicast transmission respectively.State scholarships foundation of Greece
Security and resilience challenges for the critical infrastructures of the communications sector
No full textΑI-Based Foreign Language Learning Tools Effectiveness
No full textIn this survey several studies are presented on foreign language learning assisted by AI-based tools/chatbots in a classroom setting, mostly using 5G-enabled smartphones. The focus of these studies is the qualitative and quantitative assessment of the effectiveness of the tools. Pre-tests and post-tests are frequently used to quantitatively assess student improvement with and without the use of AI-tools in several areas of language learning (vocabulary, grammar, syntax, listening, speaking, writing, etc.). A control student group is used in many cases as a baseline for assessing improvement. Furthermore, a qualitative questionnaire is filled in by the students in most of the studies to assess the strengths and weaknesses of the tools from the perspective of the users. It is found that the use of AI-based tools leads to significant improvement in learning progress.</p
A new security approach in telecom infrastructures: The RESISTO Concept
No full textCommunications play a fundamental role in the economic and social well-being of the citizens and on operations of most of the critical infrastructures (CIs). Extreme weather events, natural disasters and criminal attacks represent a challenge due to their increase in frequency and intensity requiring smarter resilience of the Communication CIs, which are extremely vulnerable due to the ever-increasing complexity of the architecture also in light of the evolution towards 5G, the extensive use of programmable platforms and exponential growth of connected devices. In this paper, we present the aim of RESISTO H2020 EU-funded project, which constitutes an innovative solution for Communication CIs holistic situation awareness and enhanced resilience
European Regulatory Challenges for Developing Digital Content Services in Modern Electronic Communications Platforms
No full textThe European Union (EU) has recently applied a more proactive and consistent regulatory approach in the wider electronic (mainly Internet-based) communications areas, also including a variety of modern broadcasting activities, aiming to promote their strategic and commercial importance. New requirements imposed by the converged information society technologies are currently demanding high-performance access and high-quality facilities (or services) for the benefits of all market actors involved (both for operators-providers and consumers). More specifically, the continuous expansion of the Internet creates considerable potential for growth, in terms of market and business activities. The latter, however, indicate that different and adequate forms of “content” should be legally available for use, treatment, storage and distribution in various technological platforms, operated from the private and the public sectors. The proposed chapter deals with the major European regulatory challenges for the development and the effective provision either of audio-visual or of other forms of digital content services, in parallel with other important issues (intellectual property rights and copyright, digital rights management, privacy issues, consumers’ interests, e-commerce, etc.). Content is a crucial factor in the digital economy, and plays a key role both economically and socially.</jats:p
Dynamics of Nonlinear Coherent Structures in a Hydrogen-Bonded Chain Model: The Role of the Dipole-Dipole Interactions
No full textTransport Properties in a Two-Coupled Zig-Zag Atomic Chain Model Including Dipole-Dipole Interactions
No full textNonlinear dynamics of localized structures and proton transfer in a hydrogen-bonded chain model including dipole interactions
No full textProton Transport in Hydrogen-Bonded Chains: A Two-Component Soliton Model Including Dipole Interactions
No full textMobile Public Key Infrastructures
No full textFrom today’s perspective, network and information security (European Commission, 2001) is about ensuring the availability of services and data; preventing the disruption and unauthorized interception of communications; confirming that data sent, received, or stored is complete and unchanged; securing data confidentiality; protecting information systems against unauthorized access; and protecting against attacks (involving malicious software and securing dependable authentication—that is, the confirming of an asserted identity of entities or users). Specific security measures therefore should be taken in order to establish an appropriate environment.</jats:p
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