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Macias A.,Espana University | Matilla-Garcia M.,Central American Business University
Energy Policy | Year: 2015

This article presents a dynamic growth model with energy as an input in the production function. The available stock of energy resources is ordered by a quality parameter based on energy accounting: the "Energy Return on Energy Invested" (EROI). In our knowledge this is the first paper where EROI fits in a neoclassical growth model (with individual utility maximization and market equilibrium), establishing the economic use of "net energy analysis" on a firmer theoretical ground. All necessary concepts to link neoclassical economics and EROI are discussed before their use in the model, and a comparative static analysis of the steady states of a simplified version of the model is presented. © 2015 Elsevier Ltd.

Romero L.,Technical University of Madrid | Romero M.S.,Central American Business University | Cuadrado M.L.,Technical University of Madrid | Fernandez J.,Technical University of Madrid
Mathematical Problems in Engineering | Year: 2015

This paper presents a work whose objective is, first, to quantify the potential of the triticale biomass existing in each of the agricultural regions in the Madrid Community through a crop simulation model based on regression techniques and multiple correlation. Second, a methodology for defining which area has the best conditions for the installation of electricity plants from biomass has been described and applied. The study used a methodology based on compromise programming in a discrete multicriteria decision method (MDM) context. To make a ranking, the following criteria were taken into account: biomass potential, electric power infrastructure, road networks, protected spaces, and urban nuclei surfaces. The results indicate that, in the case of the Madrid Community, the Campiña region is the most suitable for setting up plants powered by biomass. A minimum of 17,339.9 tons of triticale will be needed to satisfy the requirements of a 2.2 MW power plant. The minimum range of action for obtaining the biomass necessary in Campiña region would be 6.6 km around the municipality of Algete, based on Geographic Information Systems. The total biomass which could be made available in considering this range in this region would be 18,430.68 t. © 2015 L. Romero et al.

Martinez M.E.A.,Central American Business University | Borja M.-A.G.,University of Castilla - La Mancha | Jimenez J.-A.M.,University of Castilla - La Mancha
Journal of Transport Economics and Policy | Year: 2014

The Internet as a virtual sales channel has affected price behaviour. One of the most widespread beliefs is that prices are lower on the Internet. This paper analyses the effect of the dynamic pricing strategies most commonly used on the Internet on price behaviour. More specifically, we consider the prices level and price dispersion between different intermediaries, namely those that only operate on the Internet, those that operate simultaneously both online and in travel agencies, and the airlines themselves, using the prices posted on their web pages. Results show that 'pure' Internet intermediaries offer lower prices, although variability is similar.

Ramirez P.E.,Central American Business University | Mariano A.M.,Centro Universitario Of Brasilia
Informacion Tecnologica | Year: 2014

This study analyzes the scientific production in the field of business studies in Chile and Brazil. The methodology is based on scientometric tools, using as sources 7955 papers published in Scopus indexed journals between 2004 and 2013. In summary, the results indicate that although in both countries the scientific production has significantly increased, a reduction of the impact of these articles is detected. In addition, there are differences between Chile and Brazil associated to cooperation with other countries, the variety of journals where studies are published, and the structure of the ranking of the institutions that publish. The main conclusions indicate that research in this area is carried out in universities, cooperation between countries is significant in this scientific production, and dissemination is carried out mainly through regional journals. © 2014, Centro de Informacion Tecnologica. All rights reserved.

Romero L.,Technical University of Madrid | Romero M.,Central American Business University | Cuadrado M.L.,Technical University of Madrid | Fernandez J.,Technical University of Madrid
Applied Engineering in Agriculture | Year: 2015

This article has been extracted from the results of a thesis entitled "Potential bioelectricity production of the Madrid Community Agricultural Regions based on rye and triticale biomass." The aim was, first, to quantify the potential of rye (Secale Cereale L.) and triticale (Triticosecale Aestivum L.) biomass in each of the Madrid Community agricultural regions, and second, to locate the most suitable areas for the installation of power plants using biomass. At least 17,339.9 t d.m. of rye and triticale would be required to satisfy the biomass needs of a 2.2 MW power plant, (considering an efficiency of 21.5%, 8,000 expected operating hours/year and a biomass LCP of 4,060 kcal/kg for both crops), and 2,577 ha would be used (which represent 2.79% of the Madrid Community fallow dry land surface). Biomass yields that could be achieved in Madrid Community using 50% of the fallow dry land surface (46,150 ha representing 5.75% of the Community area), based on rye and triticale crops, are estimated at 84,855, 74,906, 70,109, 50,791, 13,481, and 943 t annually for the Campiña, Vegas, Sur Occidental, Área Metropolitana, Lozoya-Somosierra, and Guadarrama regions. The latter represents a bioelectricity potential of 10.77, 9.5, 8.9, 6.44, 1.71, and 0.12 MW, respectively. © 2015 American Society of Agricultural and Biological Engineers.

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