José Manuel Cordero

Learn More
The theory for measuring efficiency of producers has developed alternative approaches to include the effect of non-discretionary variables in the analysis. A review of different options in the specific literature of Data Envelopment Analysis (DEA) allows us to identify three main approaches: one-stage, two-stage and multi-stage models. Recently, some of(More)
Air Traffic Management (ATM) in general, and Air Traffic Control (ATC) systems, in particular, are commonly limited by their capacity, as they are intended to balance demand in order to provide the best possible performance to the overall network. In the case of ATM, Air Traffic Controllers (ATCO) workload is identified as one of the main limiting factors(More)
The potential of superparamagnetic iron oxide nanoparticles (SPIONs) in various biomedical applications, including magnetic resonance imaging (MRI), sensing, and drug delivery, requires that their surface be derivatized to be hydrophilic and biocompatible. We report here the design and synthesis of a compact and water-soluble zwitterionic dopamine sulfonate(More)
Chemical oxidation of under-charged Pb atoms reduces the density of trap states by a factor of 40 in films of colloidal PbS quantum dots for devices. These emissive sub-bandgap states are a byproduct of several standard ligand-exchange procedures. X-ray photoelectron spectro-scopy measurements and density function theory simulations demonstrate that they(More)
Magneto-fluorescent particles have been recognized as an emerging class of materials that exhibit great potential in advanced applications. However, synthesizing such magneto-fluorescent nanomaterials that simultaneously exhibit uniform and tunable sizes, high magnetic content loading, maximized fluorophore coverage at the surface and a versatile surface(More)
Keywords: OR in health services Efficiency Data envelopment analysis Environmental factors Nonparametric analysis a b s t r a c t This paper uses a fully nonparametric approach to estimate efficiency measures for primary care units incorporating the effect of (exogenous) environmental factors. This methodology allows us to account for different types of(More)
Traffic Demand Forecast is a key aspect of Air Traffic Management (ATM), even more relevant recently as becomes increasingly more important to effectively scale capacity and associated resources (Air Traffic Controllers amongst them) to match the actual demand. In the case of ATM, many different demand forecasts can be considered, from the simplest to the(More)