Assessing the Accuracy of Performance Modelling in Software Defined Networks

<p>Analytical modelling and experimental measurement can are used to evaluate the performance of a network. Models provide insight and measurement provides realism. For software defined networks (SDN) it is unknown how well the existing queueing models represent the performance of a real SDN network. This leads to uncertainty between what can be predicted and the actual behaviour of a software defined network. This work investigates the accuracy of software defined network queueing models. This is done through comparing the performance results of analytical models to experimental performance results. The outcome of this is an understanding of how reliable the existing queueing models are and areas where the queueing models can be improved.</p>

Assessing the Accuracy of Performance Modelling in Software Defined Networks

<p>Analytical modelling and experimental measurement can are used to evaluate the performance of a network. Models provide insight and measurement provides realism. For software defined networks (SDN) it is unknown how well the existing queueing models represent the performance of a real SDN network. This leads to uncertainty between what can be predicted and the actual behaviour of a software defined network. This work investigates the accuracy of software defined network queueing models. This is done through comparing the performance results of analytical models to experimental performance results. The outcome of this is an understanding of how reliable the existing queueing models are and areas where the queueing models can be improved.</p>

Behaviour of Reinforced Concrete Beams with and Without Web Openings using Direct Displacement Based Design

This paper describes analysis at the reinforced concrete building that contain web openings at the beam element in certain location. In the analytical modelling, the beams as treated as structural members comprising several segments which has a different dimension, and the equivalent stiffness of the opened beams has been derived. The whole structure including the beams are then analysed by the direct displacement based designed method. As the result from three analytical modelling within the variety of web openings and literature studies are compared with the evaluation of deflections and support reactions under service load. A numerical modelling is also supported the study to corroborate findings. In general, a good agreement has been obtained.