Artalejo Rodríguez, Jesús Manuel

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Person:
Artalejo Rodríguez, Jesús Manuel

First Name

Jesús Manuel

Last Name

Artalejo Rodríguez

URI

https://hdl.handle.net/20.500.14352/82709

Affiliation

Universidad Complutense de Madrid

Faculty / Institute

Ciencias Matemáticas

Area

Estadística e Investigación Operativa

Identifiers

Search Results

Now showing 1 - 4 of 4

On the distribution of the successful and blocked events in the M/M/c retrial queue: A computational approach
(Applied Mathematics and Computation, 2007) Artalejo Rodríguez, Jesús Manuel; Amador Pacheco, Julia
This paper deals with the main retrial queue of M/M/c-type with exponential repeated attempts. We refer to a busy period and present a detailed computational analysis of four new performance measures: (i) the successful retrials, (ii) the blocked retrials, (iii) the successful primary arrivals, and (iv) the blocked primary arrivals.
Modeling computer virus with the BSDE approach
(Computer Networks, 2013) Amador Pacheco, Julia; Artalejo Rodríguez, Jesús Manuel
The aim of this paper is to contribute to the connection between computer viruses spreading and epidemiological models. To this end, the block-structured state-dependent event (BSDE) approach is used to study the number of cases of infection in a computer network. The goal of the BSDE approach is the possibility of dealing with non-exponential models with correlated flows, but keeping tractable the dimensionality of the underlying Markov chain. The obtained results are illustrated by numerical experiments which show how the BSDE approach is helpful to strengthen the computer security when it is used in connection with a warning mechanism. An application to the propagation of the CodeRed-II virus is also included.
Transient analysis of the successful and blocked events in retrial queues
(Telecommunication Systems, 2009) Amador Pacheco, Julia; Artalejo Rodríguez, Jesús Manuel
The phenomenon of repeated attempts arises naturally in telecommunication and computer networks. One aspect of the retrial feature is considered in this paper, where we investigate the transient behavior of the successful and blocked events made by the primary customers and the retrial customers.
The M/G/1 retrial queue: New descriptors of the customer's behavior
(Journal of Computational and Applied Mathematics, 2009) Artalejo Rodríguez, Jesús Manuel; Amador Pacheco, Julia
We consider queuing systems where customers are not allowed to queue; instead of that they make repeated attempts, or retrials, in order to enter service after some time. The performance of telephone systems and communication networks modelled as retrial queues differs from standard waiting lines because typically the retrial group is an invisible queue which cannot be observed. As a result, the original flow of primary arrivals and the flow of repeated attempts become undistinguished. Our aim in this paper is to consider some aspects of this problem. Thus, we focus on the main retrial model of //1 type and investigate the distribution of the successful and blocked events made by the primary customers and the retrialcustomers.