Search results for "Operations Research"
showing 10 items of 1297 documents
Cognitive Translation and Interpreting Studies (CTIS)
2021
Factores asociados a los accidentes de motocicleta en Barcelona, España
2019
espanolResumen: Este estudio analizo los accidentes de motocicleta y ciclomotor en Barcelona (Espana). 53.190 informes de conductores de motocicleta y ciclomotor involucrados en accidentes entre los anos 2006 y 2011 fueron extraidos de la base de datos de accidentes con victimas de la Direccion General de Trafico. Estos datos fueron analizados en terminos de sexo, grupos de edad, motivo del desplazamiento, dia de la semana, infracciones de velocidad, uso del casco y lesividad, con el objetivo de estudiar las caracteristicas de los accidentes de motocicleta y ciclomotor en Barcelona y evaluar las diferencias entre conductores varones y mujeres en estos accidentes. La gravedad de los accident…
Evaluating the (Your Country Here) Olympic Medal Count
2013
An Olympic Games is a measurable test of a nation´s sporting power. Medal counts are the object of intense scrutiny after every Olympiad. Most countries celebrate any medal with national glee, since 60% of competing countries will win none. In 2012, 10% of the competing countries won 75% of all medals. Despite this concentration among a few countries, more countries are winning more medals now than 20 years ago, thanks in part to athlete-support and -development programs arising around the globe. Small strong sporting countries like Norway are typified by fairly large variation in medal results from Olympiad to Olympiad and a high concentration of results in a few sports. These are importan…
Towards farm-level health management of offshore wind farms for maintenance improvements
2015
This paper studies a conceptual architecture for health management of offshore wind farms. To this aim, various necessary enablers of a health management sys- tem are presented to improve reliability and availability while optimizing maintenance costs. The main focus lies on improving existing condition monitoring systems based on concepts of condition-based maintenance and relia- bility centered maintenance. A brief review of the rel- evant state-of-the-art is presented and gaps to be filled towards realization of such health management system are discussed.
Stochastic model for electrical loads in Mediterranean residential building: validation and applications
2014
A major issue in modelling the electrical load of residential building is reproducing the variability between dwellings due to the stochastic use of different electrical equipment. In that sense and with the objective to reproduce this variability, a stochastic model to obtain load profiles of household electricity is developed. The model is based on a probabilistic approach and is developed using data from the Mediterranean region of Spain. A detailed validation of the model has been done, analysing and comparing the results with Spanish and European data. The results of the validation show that the model is able to reproduce the most important features of the residential electrical consum…
Interrelations between competitiveness and responsibility at macro and micro level
2008
PurposeThe purpose of this paper is to emphasize that the growing of competitiveness at any level may be possible through more responsibility (business ethics) on the one hand and less corruption (as lack of business ethics) on the other.Design/methodology/approachThe objective of the paper is to identify the double‐way relationships between competitiveness and the responsible (beyond ethics) behaviour. In order to do this, the authors used correlation indexes CORREL and R2 and the graphic representation able to illustrate the above‐mentioned interrelations.FindingsThe authors observed that there is a strong and direct correlation between GCI, RCI and CPI – at national level, and six possib…
Choosing among alternative technological strategies: an empirical analysis of formal sources of innovation
2003
Abstract This work aims to offer a detailed conceptual and empirical analysis of the inter-firm differences in deciding the composition of their technological efforts. Using data for Spanish firms in the period 1990–1996, the study begins with the standard analysis of the determinants of innovative investment, then moves on to the less analysed question of the determinants of the generate versus import alternative and ends with a novel analysis of the characteristics which lead firms to organise research internally as compared to the possibility of contracting R&D services externally. In contrast to standard practice, the econometric approach takes into account the existence of non-linearit…
Prices and Pareto optima
2006
We provide necessary conditions for Pareto optimum in economies where tastes or technologies may be nonconvex, nonsmooth, and affected by externalities. Firms can pursue own objectives, much like the consumers. Infinite-dimensional commodity spaces are accommodated. Public goods and material balances are accounted for as special instances of linear restrictions.
The migrant crisis in the Mediterranean Sea: Empirical evidence on policy interventions
2021
Abstract This paper presents a novel set of empirical evidence to explore several hypotheses regarding the migrant crisis in the Mediterranean Sea. The political instability in transit countries, such as Libya, that made pre-existent repatriation policies ineffective, called for several search-and-rescue operations in the Mediterranean, which in turn have been wrongly accused of fostering illegal immigration and increasing deaths at sea. The empirical results show that the main determinants of the departures are several root causes at the departing African countries, underlining the importance of fighting human smuggling networks. The paper suggests a change in migration studies’ perspectiv…
Approximations and Metric Regularity in Mathematical Programming in Banach Space
1993
This paper establishes verifiable conditions ensuring the important notion of metric regularity for general nondifferentiable programming problems in Banach spaces. These conditions are used to obtain Lagrange-Kuhn-Tucker multipliers for minimization problems with infinitely many inequality and equality constraints.