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A mathematical model to study railway track dynamics for the prediction of vibration levels generated by rail vehicles
(201201)
Article
Open AccessThis article presents a mathematical model aimed at predicting wheel–rail contact vibration force arising from wheel profile irregularities. Prediction of vibrations caused by a passing train is a basic factor in environmental ... 
A mathematical programming approach for different scenarios of bilateral bartering
(Institut d'Estadística de Catalunya, 201506)
Article
Open AccessThe analysis of markets with indivisible goods and fixed exogenous prices has played an important role in economic models, especially in relation to wage rigidity and unemployment. This paper provides a novel mathematical ... 
A mathematical programming approach for different scenarios of bilateral bartering
(Institut d'Estadística de Catalunya, 20150101)
Article
Open AccessThe analysis of markets with indivisible goods and fixed exogenous prices has played an important role in economic models, especially in relation to wage rigidity and unemployment. This paper provides a novel mathematical ... 
A matrix derivation of a representation theorem for (trAp)1/p
(Universitat Politècnica de Catalunya. Centre de Càlcul, 1989)
Article
Open AccessA matrix derivation of a wellknown representation theorem for (tr Ap)1/p is given, which is the solution of a restricted maximization problem. The paper further gives a solution of the corresponding restricted minimization ... 
A matrix function useful in the estimation of linear continuoustime models.
(Institut d'Estadística de Catalunya, 2006)
Article
Open AccessIn a recent publication Chen & Zadrozny (2001) derive some equations for efficiently computing eA and ∇ eA, its derivative. They employ an expression due to Bellman (1960), Snider (1964) and Wilcox (1967) for the differential ... 
A Max coverage formulation for information dissemination in vehicular networks
(IEEE Press. Institute of Electrical and Electronics Engineers, 2009)
Conference lecture
Open AccessWe consider that a given number of Dissemination Points (DPs) have to be deployed for disseminating information to vehicles travelling in an urban area. We formulate our problem as a Maximum Coverage Problem (MCP) so as ... 
A maximum approach for robust MIMO design: combining OSTBC and beamforming with minimum transmission power requirements
(2004)
Conference report
Open AccessIn this paper we address the problem of the design of a transmitter in a MultiInputMultiOutput (MIMO) space diversity system. We consider a design which is robust to errors in the channel estimate available at the ... 
A maximum likelihood analysis of the RVoG model for forestry studies in polarimetric SAR interferometry
(European Space Agency (ESA), 2013)
Conference report
Restricted access  publisher's policyThis work analyses the validity of the RVoG model as sumption in case of PolInSAR data in forestry analy sis. In order to assure that the interferometric coherence describes a line, as imposed by the RVoG model, ... 
A mean field equation on a torus: onedimensional symmetry of solutions
(2003)
Article
Open AccessWe study the equation $$\Delta u=\lambda\left(\frac{e^u}{\int_\oep e^u} \frac{1}{\oep}\right)\quad \text{in }\oep$$ for $u\in E$, where $E = \{ u \in H^1(\oep): u \hbox{ is doubly periodic}, \int_{\oep} u = 0 \}$ and ... 
A measurement method to discriminate aircraft flyover noise
(2010)
Conference report
Restricted access  publisher's policyCurrently aircraft noise monitoring systems use a mesh of single microphones distributed around an airport to continuously sample the noise level. This fact requires a manual process of aircraft noise event detection and ... 
A measurement system for radiated transient electromagnetic interference based on general purpose instruments
(Institute of Electrical and Electronics Engineers (IEEE), 2015)
Conference report
Open AccessThis paper presents a measurement system intended to be used to assets the radiated electromagnetic interference (EMI) in both time and frequency domains. In order to keep the measurement setup as accessible and practical ... 
A mechanism for sandbar straightening by oblique wave incidence
(20130606)
Article
Open AccessBreaker bars in the surf zone of sandy beaches generally evolve between straight bars parallel to the shore and meandering crescentic bars associated with intense (dangerous) currents flowing seaward through rip channels. ... 
A mechanism for streamwise localisation of nonlinear waves in shear flows
(20150901)
Article
Open AccessWe present the complete unfolding of streamwise localisation in a paradigm of extended shear flows, namely twodimensional plane Poiseuille flow. Exact solutions of the NavierStokes equations are computed numerically and ... 
A mechanism for the generation of wavedriven rhythmic patterns in the surf zone
(200010)
Article
Open AccessThe coupling between topographic irregularities and wavedriven mean water motion in the surf zone is examined. This coupling occurs because the topographic perturbations produce excess gradients in the wave radiation ... 
A mechanism inhibiting rip channel formation for oblique waves
(World Scientific Publishing Company, 2009)
Conference lecture
Restricted access  publisher's policyPrevious numerical modelling studies based on 2DH morphodynamical model show that oblique waves tend to inhibit the formation of rip channel systems, but the mechanisms were not investigated. Field observations do not ... 
A mechanism to electrically enlarge the ground plane of handset antennas: A bandwidth enhancement technique
(201107)
Article
Restricted access  publisher's policyThere is a need of developing new techniques for enhancing the bandwidth of handset antennas without increasing the antenna volume in order to incorporate more frequency bands into the cell phones. The technique to enhance ... 
A medialaxisbased model for propagating cracks in a regularised bulk
(John Wiley & Sons, 20150217)
Article
Open AccessA new continuousdiscontinuous strategy for the simulation of failure is presented. The continuous bulk is regularised by means of a gradientenhanced damage model, where nonlocality is introduced at the level of ... 
A Mediterranean identity? The activity of the Mediterranean Cities Program
(2012)
Conference report
Open Access 
A mediterranean nocturnal heavy rainfall and tornadic event. Part I: overview, damage survey and radar analysis
(20110103)
Article
Restricted access  publisher's policyThis study presents an analysis of a severe weather case that took place during the early morning of the 2nd of November 2008, when intense convective activity associated with a rapidly evolving low pressure system affected ... 
A mediterranean nocturnal heavy rainfall and tornadic event. Part II: total lightning analysis
(20101109)
Article
Restricted access  publisher's policyOn the night from 1st to 2nd of November 2008, a multicell storm coming from the Mediterranean produced severe weather in the coastal area of Catalonia (NE Spain): groundlevel strong damaging wind gusts, a tornado – ...