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Kbar G.,Riyadh Techno Valley Research Center | Mansoor W.,American University in Dubai | Naim A.,IT House
Proceedings - 6th International Conference on Wireless and Mobile Communications, ICWMC 2010 | Year: 2010

Voice telephony over mobile is currently supported at a cost using service provider such as GSM, or using IP service provider at cheaper cost. The purpose of this research is to design and implement a telephony program that uses WIFI in p2p (Peer-to-Peer) or WLAN (Wireless Local Area Network) as a means of communication between mobile phones at no cost. The system will allow users to search for other individuals within WIFI range and to establish free p2p voice connections, or to establish virtual connection through Access Points (AP), as well as giving the option to user to use GSM in the case of no WIFI connectivity is available. The system will use a novel algorithm to convert mobile number into IP address and use it as a mean for contacting other mobile over p2p or AP using WIFI technology. The software will use a correlation between current address books available in mobile phones to convert phone numbers into IP addresses. The system will allow user to make voice conversation, sending SMS (Short Message Service) as well as MMS. Inbox and outbox services, message delivery reports, and message drafts will be used for SMS and MMS management. The current system will only allow for one call per connection, and no call waiting, or conference calls. The first step of this research and development is to resolve the technical issue regarding mapping of the mobile user's phone number to a unique IP address in order to avoid IP collision, centralized control, and user configuration. In addition, voice call will be supported using WIFI to allow mobile phones to communicate free of cost to each other through p2p or through AP. © 2010 IEEE. Source


Saidi E.,IT House
Journal of Internet Banking and Commerce | Year: 2010

E-commerce is enjoying wide recognition in many countries but its adoption in developing countries is still a challenge. In such countries, m-commerce is being preferred especially due to the relative low costs associated with the deployment of the technology behind such applications. In Malawi, drivers of m-commerce such as banks and mobile network providers are gearing to implement m-commerce applications including m-banking, m-shopping, mobile information services, m-marketing and m-health. However, the range of applications is being limited by a number of technical, business and policy challenges. In this paper, solutions to the identified challenges are proposed by drawing from literature and experiences from other countries. It is envisaged that the proposed solutions will provide an organized technical and managerial approach to understanding and addressing the implementation challenges within the emerging domain of m-commerce. © Edwin Saidi, 2009. Source


Hall-May M.,IT House | Surridge M.,IT House | Nossal-Tuyeni R.,Austro Control
International Journal of Applied Mathematics and Computer Science | Year: 2011

The SERSCIS approach aims to support the use of interconnected systems of services in Critical Infrastructure (CI) applications. The problem of system interconnectedness is aptly demonstrated by 'Airport Collaborative Decision Making' (A-CDM). Failure or underperformance of any of the interlinked ICT systems may compromise the ability of airports to plan their use of resources to sustain high levels of air traffic, or to provide accurate aircraft movement forecasts to the wider European air traffic management systems. The proposed solution is to introduce further SERSCIS ICT components to manage dependability and interdependency. These use semantic models of the critical infrastructure, including its ICT services, to identify faults and potential risks and to increase human awareness of them. Semantics allow information and services to be described in a way that makes them understandable to computers. Thus when a failure (or a threat of it) is detected, SERSCIS components can take action to manage the consequences, including changing the interdependency relationships between services. In some cases, the components will be able to take action autonomously, e.g., to manage 'local' issues such as the allocation of CPU time to maintain service performance, or the selection of services where there are redundant sources available. In other cases the components will alert human operators so they can take action instead. The goal of this paper is to describe a Service Oriented Architecture (SOA) that can be used to address the management of ICT components and interdependencies in critical infrastructure systems. Source


Giles J.,University of Southampton | Myers L.,University of Southampton | Bahaj A.,University of Southampton | O'Nians J.,IT House | Shelmerdine B.,IT House
IET Renewable Power Generation | Year: 2011

This study presents a preliminary experimental study investigating the potential benefits of foundation-based flow acceleration structures for marine current energy converters (MCECs). Such structures would provide multiple benefits, including; increased device power output, increased foundation footprint and scour protection. Two phases of experimental testing have been conducted. The first series of tests investigated the flow acceleration caused by a ramp foundation without the presence of a MCEC. They were scaled from a shallow tidal flow site and provide evidence that these structures could give power benefits of 12-25 depending on ramp size and flow depth. An optimum ramp size was established based on the suitability of the vertical velocity profiles for energy extraction. The second phase of testing modelled a commercial marine current energy convertor with a gravity-based ramp foundation. The device was modelled using actuator plates to represent the interaction between the device and the surrounding flow field. A proposed single-operation installation method using a concrete ramp foundation is proposed and preliminary stability calculations are presented. © 2011 The Institution of Engineering and Technology. Source

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