The Invariant Two-Parameter Function of Algebras ψ

At present, the research on invariant functions for algebras is very extended since Hrivnák and Novotný defined in 2007 the invariant functions y and j as a tool to study the Inönü–Wigner contractions (IW-contractions), previously introduced by those authors in 1953. In this paper, we introduce a new invariant two-parameter function of algebras, which we call ¯y, as a tool which makes easier the computations and allows researchers to deal with contractions of algebras. Our study of this new function is mainly focused in Malcev algebras of the type Lie, although it can also be used with any other types of algebras. The main goal of the paper is to prove, by means of this function, that the five-dimensional classical-mechanical model built upon certain types of five-dimensional Lie algebras cannot be obtained as a limit process of a quantum-mechanical model based on a fifth Heisenberg algebra. As an example of other applications of the new function obtained, its computation in the case of the Lie algebra induced by the Lorentz group SO(3, 1) is shown and some open physical problems related to contractions are also formulated.Ministerio de Ciencia e Innovación MTM2013-40455-PMinisterio de Ciencia e Innovación FQM-326 (J.N.-V.)Junta de Andalucía FQM-160 (P.P.-F.

L'esplendor corporatiu en les ciutats catalanes del segle XVI. L'exemple de Lleida

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Hisenda municipal i arrendaments públics al Balaguer del segle XVIII

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Reducing incompatibility in a local AHP-group decision making context

In the context of local analytic hierarchy process-group decision making (AHP-GDM), this paper presents a theoretical framework and a semi-automatic procedure for reducing incompatibility between the actors involved in the decision making process and the collective position. The row geometric mean is employed as the prioritisation procedure and the geometric compatibility index (GCOMPI ) as the incompatibility measure; individual pairwise comparison matrices are considered as the input of the reduction process, whilst the collective vector is the output. The reduction is attained by slightly modifying, in relative terms, the judgements of the collective pairwise comparison matrix, irrespective of the method used to obtain it, that further improve the GCOMPI . The resulting judgements of the collective matrix and the associated collective priorities are close to the initial collective values. The procedure does not modify the judgements of the initial individual matrices and this simplifies the process of reaching consensus. A simulation analysis is utilised to study the performance of the algorithm along with an illustrative numerical example. The analysis proves that the proposed algorithm is easy to implement and efficient, it provides mathematically closed results and significantly reduces the GCOMPI associated with the precise consistency consensus matrix which is one of the AHP-GDM tools. The framework allows the procedure to be adapted to specific interests

Business Process Reengineering: analysis and discussion of critical factors trhough a case study

Gran parte de los proyectos de Reingeniería de Procesos de Negocio (BPR) emprendidos por las organizaciones no alcanzan sus objetivos, habiéndose identificado su implantación como un factor esencial para el éxito. A partir de una revisión de la literatura especializada, hemos identificado un conjunto de factores relevantes en la implantación del BPR y los aspectos más debatidos en el ámbito académico y profesional sobre cada una de sus etapas. Para comprender mejor estos factores y etapas del BPR, hemos desarrollado un estudio de caso longitudinal con un enfoque de procesos. Este método nos ha permitido considerar con mayor profundidad el proceso de implantación de la reingeniería.Many projects of Business Process Reengineering (BPR) undertaken by organizations don't achieve their objectives, there being identified their implementation as an essential factor for the success. Starting from a revision of the specialized literature we have identified a group of excellent factors in the BPR implementation and the most debated aspects in the academic and professional environment of each one of general stages of it. For improving our comprehension on these factors and stages of BPR, we have developed a longitudinal case study with a analysis processual. This research method has allowed us to consider with more depth the implementation of the reengineering

Reingeniería de procesos y calidad total en la práctica empresarial: estudio de un caso

Las prácticas empresariales dirigidas a la mejora de los procesos de negocio y a la reducción de costes han suscitado un gran interés en la investigación en Contabilidad de Gestión en los años 80 y 90, destacando entre ellas por su amplia difusión entre las organizaciones, la Gestión de la Calidad Total y la Reingeniería de Procesos de Negocio. Este trabajo analiza las semejanzas y diferencias entre estas dos prácticas y su relación en la realidad empresarial, cuestiones ampliamente debatidas en el ámbito académico y profesional. Para ello, hemos desarrollado un estudio de caso longitudinal en el que se han puesto de manifiesto importantes diferencias en cuanto a sus objetivos, factores básicos, implantación y repercusiones organizativas, mostrándose además que son compatibles cuando se desarrollan secuencialmente

Marketing channels in the wine sector: wine distributors in catalonia as a case study

Postprint (published version