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<b>Background:</b> Continuously calibrated and validated parametric models are necessary for realistic software estimates. However, in practice, variations in model adoption and usage patterns introduce a great deal of local bias in the resultant historical data. Such local bias should be carefully examined and addressed before the historical data can be(More)
Survivability of telecommunication networks has emerged as a fundamental concern for network design and operation. The network physical infrastructures are vulnerable to correlated failures arising from disastrous events. Particularly, some disasters such as natural disasters and malicious attacks may propagate across geographical areas in a short period of(More)
Steroidogenic acute regulatory protein (StAR) transports cholesterol, the substrate for steroid synthesis, to the inner membranes of mitochondria. It is well known that estrogen is essential for female sex determination/differentiation in fish. However, no reports showed that the conventional StAR, which was supposed to be essential for estrogen production,(More)
IEEE 802.16e networks can be widely applied in broadband wireless access scenarios. Admission control is an essential mechanism in IEEE 802.16e networks to guarantee the QoS of different subscribers. In this paper, we propose a novel bandwidth degradation scheme for the admission control in IEEE 802.16e networks. Simulation results are presented to(More)
This paper focuses on survivability modeling to characterize the transient behavior of an infrastructure-based wireless network in the presence of disastrous failures and repairs. Two modeling approaches, an exact model and an approximate product-form model are presented. Numerical experiments with the two models demonstrates that the approximative(More)
The IEEE 802.16e is a compatible and reasonable technology to solve the last mile access problem. Since the multiple services in the system are connection-oriented, it is crucial to provide effective admission control and resource allocation mechanisms to guarantee the Quality of Service (QoS) of the system. In this paper, we investigate the joint bandwidth(More)
In Cognitive Radio Mesh Networks (CogMesh), Secondary Mesh Routers (SMRs) can opportunistically utilize the licensed spectrums for the traffic of the Secondary Mesh Users (SMUs). How to guarantee Quality of Service (QoS) for real-time services over CogMesh is still an opening issue. In this paper, we present a discrete-time vacation queueing system to(More)
Network survivability is the ability of a network to continuously deliver the required services under undesired events. It has become a fundamental concern for the design and performance evaluation of telecommunication networks. We present survivability models for a telecommunication network subject to disaster propagation. The primary objective is to(More)