Multiculturalitat i interculturalitat en la Història de Catalunya

La finalitat de la recerca, concebuda com a recerca aplicada ha consistit en confegir un manual d’història de Catalunya (Catalunya+suma) especialment destinat a la immigració. El treball havia de contextualizar aspectes generals d’història política, social i cultural (endògenes), amb les aportacions, ètniques i culturals (exògenes) rebudes a Catalunya al llarg del temps i que han configurat al capdavall la societat catalana, entesa com a formació cultural i socio-política, les variables de la qual han estat en contínua coevolució. Per tant tractar la dialèctica de com, en un període de temps, les aportacions exògenes és converteixen en endògenes, i sempre en una perspectiva temporal i històrica, ha estat l’objectiu del treball. La recerca bibliogràfica i la transposició didàctica han estat les principals components metodològiques. S’han tingut especialment en compte les aportacions de la historiografia contemporània, tot i que s’ha fet un esforç per integrar coneixement generat dels del punt de vista de l’arqueologia i l’antropologia, història de l’art, sociologia, etc. Pel que fa a la recerca didàctica el tret més important ha estat, precisament, el procés de transposició didàctica destinat a convertir el saber disciplinar en saber comprensible. El projecte “Multiculturalitat i interculturalitat en la Història de Catalunya” ha generat un estudi històric i didàctic de síntesi sobre història del país que es concreta en el manual “Catalunya+Suma”. Es tracta d’un manual d‘història de Catalunya dirigit a un horitzó d’ampli espectre i de manera molt especial als immigrants. Cal destacar també que el treball te un caràcter inicial i iniciàtic i que te possibilitats de desenvolupament posterior a partir de l’elaboració de materials didàctics i guies patrimonials expressament adreçada a la immigració i entorns afins. El manual “Catalunya+suma" vol incidir, prioritàriament en la formació inicial i permanent de la immigració, i en els espais formals, i no formals, d’ensenyament i aprenentatge.

Marco institucional formal de la creación de empresas en Catalunya: oferta y demanda de servicios de apoyo

El apoyo y el fomento a la creación de nuevas empresas se ha convertido en las últimas décadas en objetivo principal de las administraciones públicas, justificado principalmente por la incidencia positiva que tienen las mismas tanto en la generación de puestos de trabajo como en el crecimiento económico y en el potencial innovador. En esta investigación se analiza el marco institucional formal de la creación de empresas en Catalunya, tanto desde el punto de vista de la oferta (instituciones y programas de apoyo) como desde el punto de vista de la demanda (nuevos empresarios), tomando la teoría institucional como marco teórico. Para el estudio de la oferta se entrevistaron 20 responsables del área de creación de empresas de las instituciones catalanas más relevantes, completando dicha información con fuentes de datos secundarios (folletos de las instituciones, memorias, estadísticas, etc.). Para el análisis de la demanda se realizaron 307 encuestas telefónicas a empresarios potenciales y 60 entrevistas personales a empresarios actuales. Los resultados del presente trabajo ponen de manifiesto que en Catalunya existen muchas instituciones y programas de apoyo a la creación de empresas. Esta diversificación, junto a la falta de coordinación entre las instituciones implicadas, conduce a duplicaciones y solapamientos en la oferta de programas destinados a las nuevas empresas. En cuanto a la demanda, los resultados reflejan que la muestra de empresarios potenciales conoce y ha utilizado en mayor medida los programas de apoyo que la muestra de empresarios actuales. Por otra parte, ambas muestras valoran mejor los programas no económicos que los económicos, habiendo tenido también éstos mayor importancia en el proceso de creación de la empresa.

Venture capital meets contract theory: risky claims or formal control?

This paper develops a theory of the joint allocation of formal control and cash-flow rights in venture capital deals. We argue that when the need for investor support calls for very high-powered outside claims, entrepreneurs should optimally retain formal control in order to avoid excessive interference. Hence, we predict that risky claims should be be negatively correlated to control rights, both along the life of a start-up and across deals. This challenges the idea that risky claims should a ways be associated to more formal control, and is in line with contractual terms increasingly used in venture capital, in corporate venturing and in partnership deals between biotech start-ups and large drug companies. The paper provides a theoretical explanation to some puzzling evidence documented in Gompers (1997) and Kaplan and Stromberg (2000), namely the inclusion in venture capital contracts of contingencies that trigger both a reduction in VC control and the conversion! of her preferred stocks into common stocks.

Tropical varieties for non-archimedean analytic spaces

"Vegeu el resum a l'inici del document del fitxer adjunt."

Weighted Hardy spaces for the unit disc: approximation properties

In this paper we study basic properties of the weighted Hardy space for the unit disc with the weight function satisfying Muckenhoupt's (Aq) condition, and study related approximation problems (expansion, moment and interpolation) with respect to two incomplete systems of holomorphic functions in this space.

Norm inequalities in multidimensional Lorentz spaces

In this paper we obtain necessary and sufficient conditions for double trigonometric series to belong to generalized Lorentz spaces, not symmetric in general. Estimates for the norms are given in terms of coefficients.

Variational inequalities in Hilbert spaces with measures and optimal stopping problems

We study the existence theory for parabolic variational inequalities in weighted L2 spaces with respect to excessive measures associated with a transition semigroup. We characterize the value function of optimal stopping problems for finite and infinite dimensional diffusions as a generalized solution of such a variational inequality. The weighted L2 setting allows us to cover some singular cases, such as optimal stopping for stochastic equations with degenerate diffusion coeficient. As an application of the theory, we consider the pricing of American-style contingent claims. Among others, we treat the cases of assets with stochastic volatility and with path-dependent payoffs.

Encryption methods using formal power series rings

Recently there has been a great deal of work on noncommutative algebraic cryptography. This involves the use of noncommutative algebraic objects as the platforms for encryption systems. Most of this work, such as the Anshel-Anshel-Goldfeld scheme, the Ko-Lee scheme and the Baumslag-Fine-Xu Modular group scheme use nonabelian groups as the basic algebraic object. Some of these encryption methods have been successful and some have been broken. It has been suggested that at this point further pure group theoretic research, with an eye towards cryptographic applications, is necessary.In the present study we attempt to extend the class of noncommutative algebraic objects to be used in cryptography. In particular we explore several different methods to use a formal power series ring R && x1; :::; xn && in noncommuting variables x1; :::; xn as a base to develop cryptosystems. Although R can be any ring we have in mind formal power series rings over the rationals Q. We use in particular a result of Magnus that a finitely generated free group F has a faithful representation in a quotient of the formal power series ring in noncommuting variables.

On the boundedness on inhomogeneous Lipschitz spaces of fractional integrals, singular integrals and hypersingular integrals associated to non-doubling measures on metric spaces

In this paper we prove T1 type necessary and sufficient conditions for the boundedness on inhomogeneous Lipschitz spaces of fractional integrals and singular integrals defined on a measure metric space whose measure satisfies a n-dimensional growth. We also show that hypersingular integrals are bounded on these spaces.

Homotopy exponents for large H-Spaces

We show that H-spaces with finitely generated cohomology, as an algebra or as an algebra over the Steenrod algebra, have homotopy exponents at all primes. This provides a positive answer to a question of Stanley.

Net spaces and boundedness of integral operators

In this paper we introduce new functional spaces which we call the net spaces. Using their properties, the necessary and sufficient conditions for the integral operators to be of strong or weak-type are obtained. The estimates of the norm of the convolution operator in weighted Lebesgue spaces are presented.

Convolution inequalities in Lorentz spaces

In this paper we study boundedness of the convolution operator in different Lorentz spaces. In particular, we obtain the limit case of the Young-O'Neil inequality in the classical Lorentz spaces. We also investigate the convolution operator in the weighted Lorentz spaces. Finally, norm inequalities for the potential operator are presented.