Abstract This paper focuses on user-centric mobileTV service considering the users’ consumption style, the cost reduction of network resources and the enhancement of End-Users’ Quality of Experience (QoE). We consider a nomadic access scenario where each user is able to access his mobile TV content AnyTime, AnyWhere and from Any Device (ATAWAD), considering the eMBMS (Evolved Multimedia Broadcast Multicast Service) diffusion.... This paper focuses on user-centric mobileTV service considering the users’ consumption style, the cost reduction of network resources and the enhancement of End-Users’ Quality of Experience (QoE). We consider a nomadic access scenario where each user is able to access his mobile TV content AnyTime, AnyWhere and from Any Device (ATAWAD), considering the eMBMS (Evolved Multimedia Broadcast Multicast Service) diffusion. In multicast TV delivery, clients join/ leave the multicast TV source of channels according to their requests. However, during Nomadic Access (NA), the multicast tree has to be reconstructed according to the new demands. This paper introduces a solution that adapts the multicast delivery for mobileTV service through optimizing the tree structure of multicast nodes in a dynamic manner according to the different context of the user and the network. The proposed solution optimizes the investment cost (CAPEX) of multicast sources (streaming points) and opens the way to an enhancement of the Quality of Experience (QoE) of End-User. Read More Read Less

Abstract In this paper, a dual frequency resonance antenna is analysed by introducing U-shaped slot in a rectangular patch, the results in terms of return loss and radiation pattern are given. It is observed that various antenna parameters are obtained as a function of frequency for different value of slot length and width; it is easy to adjust the upper and... In this paper, a dual frequency resonance antenna is analysed by introducing U-shaped slot in a rectangular patch, the results in terms of return loss and radiation pattern are given. It is observed that various antenna parameters are obtained as a function of frequency for different value of slot length and width; it is easy to adjust the upper and the lower band by varying these different antenna parameters. In the present work variation of substrate permittivity is also studied. All the theoretical results using Matlab are compared with the simulated results obtained from Ansoft HFSS which are in close agreement. Read More Read Less

Abstract Industrial control systems (ICS) control almost all the vital processes and industries that have direct effects on our lives. Recent information security breaches found in these systems have led to proliferation of attacks that can endanger not only the company they were deployed in but the people and environment around it. Stuxnet worm was a ‘successful’ story. Recently, it is... Industrial control systems (ICS) control almost all the vital processes and industries that have direct effects on our lives. Recent information security breaches found in these systems have led to proliferation of attacks that can endanger not only the company they were deployed in but the people and environment around it. Stuxnet worm was a ‘successful’ story. Recently, it is shown that even regular attackers without sophisticated tools, like Stuxnet, can take control of ICS and create disasters. Even though vast amount of effort has put into securing ICS, this paper aims to illustrate that based on reported and experimentally obtained vulnerabilities on all aspects of ICS, no short term solution to protect ICS exists. This makes all ICSs vulnerable to at least one or more forms of attacks especially when network access is possible. Having insecure ICS will lead to dare consequences that will affect every one of us irrespective of color, nationality and religion. Since attack scenarios to ICS and code segments of malwares such as Stuxnet can be found on Internet, attacking ICS can be orchestrated with little effort from anywhere. Unfortunately, these forms of cyber attacks cannot be traced easily. The proven governmental investments to exploit these security breaches as untraceable weapons will lead the whole world into a very dark future. Last but not least, ICS with security considerations must be reinvented from the ground up and no patch can fix the problems if they not worsen it. Read More Read Less

Abstract All-optical long-haul network in a rapid development to increase the optical communication systems capacity. As a point in this direction we report the optimum values of the bandwidth of the optical for a system of high mode coupling optical fibers using DPSK modulation format for the input signal with considering the impairments CD, PMD, PDL, and the noise. Furthermore, we... All-optical long-haul network in a rapid development to increase the optical communication systems capacity. As a point in this direction we report the optimum values of the bandwidth of the optical for a system of high mode coupling optical fibers using DPSK modulation format for the input signal with considering the impairments CD, PMD, PDL, and the noise. Furthermore, we did get the optimum electrical filters bandwidth as well. Read More Read Less