51 citations · 263 across the 62 of their papers we have counts for
6 papers · 2 filters
Insensitivity of Proportional Fairness in Critically Loaded Bandwidth Sharing Networks
Maria Vlasiou, Jiheng Zhang, Bert Zwart
Proportional fairness is a popular service allocation mechanism to describe and analyze the performance of data networks at flow level. Recently, several authors have shown that th…
Corrected phase-type approximations for the workload of the MAP/G/1 queue with heavy-tailed service times
Eleni Vatamidou, Ivo J. B. F. Adan, Maria Vlasiou +1
In many applications, significant correlations between arrivals of load-generating events make the numerical evaluation of the load of a system a challenging problem. Here, we cons…
Separation of timescales in a two-layered network
Maria Vlasiou, Jiheng Zhang, Bert Zwart
We investigate a computer network consisting of two layers occurring in, for example, application servers. The first layer incorporates the arrival of jobs at a network of multi-se…
Corrected phase-type approximations of heavy-tailed risk models using perturbation analysis
Eleni Vatamidou, Ivo J. B. F. Adan, Maria Vlasiou +1
Numerical evaluation of performance measures in heavy-tailed risk models is an important and challenging problem. In this paper, we construct very accurate approximations of such p…
On the accuracy of phase-type approximations of heavy-tailed risk models
Eleni Vatamidou, Ivo J. B. F. Adan, Maria Vlasiou +1
Numerical evaluation of ruin probabilities in the classical risk model is an important problem. If claim sizes are heavy-tailed, then such evaluations are challenging. To overcome…
Time-dependent behaviour of an alternating service queue
Maria Vlasiou, Bert Zwart
We consider a model describing the waiting time of a server alternating between two service points. This model is described by a Lindley-type equation. We are interested in the tim…