Normally torsion-free lexsegment ideals

In this paper we characterize all the lexsegment ideals which are normally torsion-free. Our characterization is given in terms of the ends of the lexsegment. We also prove that the property of being normally torsion-free is equivalent to the property of the depth function of being constant

CONTROVERCY IN THE EVOLUTION OF THE WORLD AND EUROPEAN FINANCIAL REGULATION

The financial regulation structures are linked to traditions and differ from onecountry to another. The financial revolution, and in Europe, the creation of unique market ofthe financial services launched again debates over the suitability of the regulation structures. 5-10 years ago, the debates were quartered over the virtues, especially on thedisadvantages that the self-regulation system shows vs. the regulation practiced by the publicorganisms within the law provisions. The debate is based now on types of problems: the roleof the central bank and the problem of the specialization. Regarding the role of the central bank, there are arguments if the central bank is theproper authority to supervise banking and act in accordance with it, as a councilor, afterall. Regarding the specialization, there are arguments if a super or hiper authority,authorized to regulate all the types of services and financial institutions is more adequatethan the regulation by specialized agencies. At the level of the European Union, there is an extra problem if the nationalauthorities must keep the prerogative of financial services supervision, however inaccordance with the basic principle of the economic and monetary integration, or if, on thecontrary, it is better to form a European supervision authority for the financial services.globalization; financial regulation; financial supervision; financial markets efficiency,financial conglomerates.

Modern marketing,determinant concept in the reappraisal of business and organizational professions and of training professionals in the new economy

The content of marketing is countinously redefined and reflected in new concepts, therefore leading to the development of a new concept the modern marketing. The modern marketing has as orientation and tendency the concept of internal marketing, understood as an extension of the vision, marketing philosophy on persons and networks within companies. The concept, at large, is reflected by the apparition and development of specific instruments: integrated marketing, integrated marketing communication, management of the supply-sales relationship. Integrated marketing is the concept that is based on defining marketing as a philosophy, optic, vision on all activities of the company and especially the difficulty and inefficiency of cooperation as a modality to implement this concept. This assessment raises the problem of using the modern marketing in education, as a necessity to modernize the management system and also the educational system.marketing evolution, marketing capabilities, marketing education

Factorised Representations of Query Results

Query tractability has been traditionally defined as a function of input database and query sizes, or of both input and output sizes, where the query result is represented as a bag of tuples. In this report, we introduce a framework that allows to investigate tractability beyond this setting. The key insight is that, although the cardinality of a query result can be exponential, its structure can be very regular and thus factorisable into a nested representation whose size is only polynomial in the size of both the input database and query. For a given query result, there may be several equivalent representations, and we quantify the regularity of the result by its readability, which is the minimum over all its representations of the maximum number of occurrences of any tuple in that representation. We give a characterisation of select-project-join queries based on the bounds on readability of their results for any input database. We complement it with an algorithm that can find asymptotically optimal upper bounds and corresponding factorised representations.Comment: 44 pages, 13 figure