Satellite-derived sea surface temperature (SST) is used to monitor coral bleaching through the National Oceanic and Atmospheric Administration’s Coral Reef Watch (CRW) Decision Support System (DSS). Since 2000, a broad-scale 50 km SST was used to monitor thermal stress for coral reefs globally. However, some discrepancies were noted when applied to small-scale fringing coral reefs. To address t...

Finding a suitable multi-dimensional index structure for a data-intensive system is not a trivial task. The QuEval framework supports users in finding the best index structure from a list of candidates. Nevertheless, if an index structure shows itself superior to other index structures most oft the times, but fails for one data set, we want to know the reason for this phenomenon. To support an ...

The Intelligent Network (IN) architecture promises easy development and fast deployment of sophisticated communication services. In this paper, we present the results of our research in the area of Intelligent Multimedia Services. One of the main results has been the evaluation of novel multimedia services operating over different network platforms. One of the new services being designed is a M...

The recent proliferation of streaming media systems in both wired and wireless networks challenges the network operators to provide cost-effective streaming solutions that maximize the usage of their infrastructure while maintaining adequate service quality. Some of these goals conflict and motivate the development of precise and accurate models that predict the system states under extremely di...

The use of unlicensed spectrum for future LTE systems raises concerns about its impact on co-located Wi-Fi networks. As specifications are being developed, simulation has been widely employed for assessing the performance of coexistence mechanisms for LTE on unlicensed bands. We report herein on extensions to a popular network simulator, known as ns-3, to model such coexistence. To our knowledg...

Commercial, off-the-shelf (COTS) software has gained considerable popularity as an approach that quickly and economically creates software systems that address business requirements. The saved development time and money will be wasted if the performance evaluation of the system is deferred, potentially leading to performance issues in the system. To save on the costs of performance problem dete...

As Internet services rapidly become an essential part of the global infrastructure, it is necessary for the protocols underlying these services to be robust and failsafe. To achieve this goal, protocol developers should be able to design, implement, simulate, visualize, and validate their work in a protocol development environment before deployment in the field. In this paper we describe the EN...

Wireless networking has become an important area of research in academic and industry. The main objectives of this paper is to gain in-depth knowledge about the Wi-FiWiMAX technology and how it works and understand the problems about the WiFiWiMAX technology in maintaining and deployment. The challenges in wireless networks include issues like security, seamless handover, location and emergency...

The recent proliferation of streaming media systems in both wired and wireless networks challenges the network operators to provide cost-effective streaming solutions that maximize the usage of their infrastructure while maintaining adequate service quality. Some of these goals conflict and motivate the development of precise and accurate models that predict the system states under extremely di...

Handling systems for power wheelchairs are very useful for users who have di culty moving by themselves; however, most of the current models are designed exclusively for diplegic people and quadriplegics users with a speci c disability. But it doesn't exist yet a wheelchair that assist it properly and e ciently the di erent disabilities that may present a quadriplegic due to the level of the in...