26 citations · 50 across the 12 of their papers we have counts for
9 papers · 1 filter
A Holistic Approach for Bitcoin Confirmation Times & Optimal Fee Selection
Rowel Gündlach, Ivo V. Stoepker, Stella Kapodistria +1
Bitcoin is currently subject to a significant pay-for-speed trade-off. This is caused by lengthy and highly variable transaction confirmation times, especially during times of cong…
Workload analysis of a two-queue fluid polling model
Stella Kapodistria, Mayank Saxena, Onno Boxma +1
In this paper, we analyze a two-queue random time-limited Markov modulated polling model. In the first part of the paper, we investigate the fluid version: Fluid arrives at the two…
Unified approach for solving exit problems for additive-increase and multiplicative-decrease processes
Remco van der Hofstad, Stella Kapodistria, Zbigniew Palmowski +1
We analyse an additive-increase and multiplicative-decrease (aka growth-collapse) process that grows linearly in time and that experiences downward jumps at Poisson epochs that are…
Stability of two-dimensional Markov processes, with an application to QBD processes with an infinite number of phases
Stella Kapodistria, Seva Shneer
In this paper, we derive a simple drift condition for the stability of a class of two-dimensional Markov processes, for which one of the coordinates (also referred to as the {\em p…
Analysis of the shortest relay queue policy in a cooperative random access network with collisions
Mayank Saxena, Ioannis Dimitriou, Stella Kapodistria
The scope of this work is twofold: On the one hand, strongly motivated by emerging engineering issues in multiple access communication systems, we investigate the performance of a…
Two queues with random time-limited polling
Mayank Saxena, Onno Boxma, Stella Kapodistria +1
In this paper, we analyse a single server polling model with two queues. Customers arrive at the two queues according to two independent Poisson processes. There is a single server…
Matrix geometric approach for random walks: stability condition and equilibrium distribution
Stella Kapodistria, Zbigniew Palmowski
In this paper, we analyse a sub-class of two-dimensional homogeneous nearest neighbour (simple) random walk restricted on the lattice using the matrix geometric approach. In partic…
Approximate performance analysis of generalized join the shortest queue routing
Jori Selen, Ivo J. B. F. Adan, Stella Kapodistria
In this paper we propose a highly accurate approximate performance analysis of a heterogeneous server system with a processor sharing service discipline and a general job-size dist…
Steady-state analysis of shortest expected delay routing
Jori Selen, Ivo J. B. F. Adan, Stella Kapodistria +1
We consider a queueing system consisting of two non-identical exponential servers, where each server has its own dedicated queue and serves the customers in that queue FCFS. Custom…