Claudio Enrique Risso

• Universidad de la República de Uruguay

This article describes an approach applying computational intelligence methods for the problem of forecasting solar photovoltaic power generation at country level. Precise forecast of power generation plays a vital role in designing a dependable photovoltaic power generation system. The computed predictions enable the implementation of efficient pl...

Featured Application The proposed bi-objective model is suitable to provide solutions for the bus synchronization problem to enhance successful transfers in public transportation, considering the cost of the system and the quality of service provided to the users. Abstract Modern cities heavily rely on public transport systems to enhance citizen a...

This article presents the application of exact and metaheuristic approaches to the problem of designing the backbone network of a hierarchically public transportation system for Montevideo, Uruguay. This is a very relevant problem in nowadays smart cities, as it accounts for many social and environmental impacts and also affects the dynamics of the...

Providing an efficient public transportation system is a key issue to increase the livability and sustainability of modern cities. This article addresses the bus timetabling problem for enhancing multi-leg trips or transfers. For this purpose, a mixed-integer programming model is proposed, aimed at maximizing the amount of transfers while consideri...

Providing an efficient public transportation system is a key issue to increase the livability and sustainability of modern cities. This article addresses the bus timetabling problem for enhancing multi-leg trips or transfers. For this purpose, a mixed-integer programming model is proposed, aimed at maximizing the amount of transfers while consideri...

This article presents an exact approach for solving the problem of locating electric vehicle charging stations in a city, whose goal is upon minimizing the distance citizens must span to charge their vehicles. Mixed integer programming formulations are presented for two variants of the problem: relaxed (i.e., without considering electrical constrai...

This article presents a metaheuristic resolution approach for a variant of the Vehicle Routing Problem considering heterogeneous fleet and flexible time windows. This problem variant solved considers extended time windows for delivering products to customers, modeling a realistic situation for logistics in smart cities. The proposed metaheuristic f...

Featured Application The planning methods presented in this article are specifically applicable to help decision makers in the processes of the configuration and operation of public intelligent transportation systems under the novel paradigm of smart cities. Abstract This article addresses timetable synchronization in public transportation, an imp...

The Internet is a collection of interconnected Autonomous Systems (ASes) that use the Border Gateway Protocol (BGP) to exchange reachability information. In this regard, BGP stability and scalability in the inter-domain scope have been matters of major concern for many years, and network engineers have been applying several techniques to cope with...

This document analyses the problem of designing a minimum cost local wind turbine grid (or LWTG) for an onshore wind farm. The LWTG is responsible for adding up the power of the farm’s wind turbines to then deliver it to a high voltage network. To minimize disruption of agricultural activities, the cables should be laid along underground conduits,...

The increasing rate of penetration of non-conventional renewable energies is affecting the traditional assumption of controllability over energy sources. Power dispatch scheduling methods need to integrate the intrinsic randomness of some new sources, among which, wind energy is particularly difficult to treat. This work aims at the optimal constru...

This article presents the application of mathematical programming and evolutionary algorithms to solve a variant of the Bus Timetabling Synchronization Problem. A new problem model is proposed to include extended synchronization points, accounting for every pair of bus stops in a city, the transfer demands for each pair of lines, and the offset for...

Massive public infrastructure is usually structured into hierarchical levels, where different technologies handle different scales of requirements allowing most efficient and scalable implementations. In opposition to the aforementioned architecture, the public transport system in Montevideo (Uruguay) uses a single/flat level, with buses as the onl...

During the day of October 7-8, the congress has invited experts from the sector of Smart Cities to organize a sectoral debate. This debate will be composed of prestigious companies in the sector, Public Administration, as well as specialized consultants. The aim is to give a business point of view around Smart Cities. CYTED is the Ibero-American Pr...

Whether due to economic pressure or environmental concerns, the penetration rate of renewable energies has been increasing over recent years. Uruguay is a leader country in the usage of renewable energies, getting 98% of its electricity from such sources. Its lack of fossil energy resources has historically pushed this country to rely on hydro-ener...

The Internet results from interconnecting several thousands of Autonomous Systems (ASes), which are networks under a single administrative domain such as: corporations, service providers, universities, and content providers, among others. To ensure global communication between end users, it is necessary that routers of every AS get to learn all IP...

Autonomous Systems (ASes) exchange routing information about networks they can reach in the Internet, and the most widely extended way to connect them is by means of Border Gateway Protocol (BGP) sessions. ASes set up external BGP (eBGP) sessions between the AS border routers (ASBR) of neighboring ASes, and the routing information learned by ASBRs...

The increasing rate of penetration of non-conventional renewable energies is affecting the traditional assumption of controllability over energy sources. Power dispatching scheduling methods need to integrate the intrinsic randomness of some new sources, among which, wind energy is particularly difficult to treat. This work aims on the construction...

This work introduces metaheuristic approaches for designing resilient and cost-effective multiprotocol label switching (MPLS) networks, a technology that is gaining prominent importance since most of the global data traffic is Internet traffic, and most internet protocol (IP) traffic within service provider backbones is being supported upon the IP/...

An embedding of a guest graph G over a host graph H is an injective map Φ from the vertices of G to the vertices of H and a routing map ρ, which associates every edge e=xy in G to a Φ(x)-Φ(y) path ρ(e) in H. Given an edge f in H the number of edges e in G such that f belongs to ρ(e) is the (edge) congestion cong(f) of f. The length of ρ(e) is calle...

The main objective of this thesis is to find good quality solutions for rep- resentative instances of the problem of designing a resilient and low cost IP/MPLS network, to be deployed over an existing optical transport network. This research is motivated by two complementary real-world application cases, which comprise the most important commercial...

Different approaches for deploying resilient optical networks of low cost constitute a traditional group of NP-Hard problems that have been widely studied. Most of them are based on the construction of low cost networks that fulfill connectivity constraints. However, recent trends to virtualize optical networks over the legacy fiber infrastructure,...

In this paper, we study a network design problem arising from the deployment of an IP/MPLS network over an existing transport infrastructure. The goal is to find a minimum cost installation of links such that traffic demands can resiliently be accomplished. In this paper, an integer programming formulation and metaheuristic are presented. This work...

The deployments of low-cost resilient optical networks constitute a traditional family of NP-Hard problems. Recent trends to maximize the efficiency of the existing optical infrastructure through the virtualization of optical connections, has as its main drawback that a single point of physical failure can unleash simultaneous failures in multiple...

Setting aside technical details and for the purpose of the model presented in this work, we remark two important differences between SDH and IP/MPLS. The first one is the need of SDH to keep different demands between the same nodes. In IP/MPLS networks, all the traffic from one node to another follows the same path in the network referred to as IP/...

Over the last decades multilayered networks have been a key design component for telecommunications infrastructure. Although some works have addressed the optimization of multi-overlay networks, just a few of them are contextualized for the current technological environment. This article focuses on solving the problem of designing a minimum-cost fa...