Literatura y otras artes - Hip Hop, Eminem and his multiple identities

Además del lado perverso que muestra Eminem en muchas de sus canciones, también existe un lado personal en él que queda prácticamente desconocido. Por ello, nosotros en este trabajo proponemos un análisis de estos distintos “yo”, precedido por la descripción de los cuatro elementos que componen esta tribu urbana, los que consideramos los eventos clave en la historia del hip-hop y un panorama de los principales países y sus MCs para detallar su importancia.Besides the evil self Eminem shows in many of his songs, there is a personal side in him which may remain practically unknown. Therefore, in this work we propose an analysis of these different selves, preceded by a description of the 4 elements which conform this urban culture, what we consider the key events in hip-hop history and a tour over the main countries and its MCs to detail their relevance

Cosmic Lensing -- A new paradigm for Universe expansion interpretation

The Einstein's General Relativity theory and the Friedmann-Lemaitre-Robertson-Walker (FLRW) metrics define the main equations that rule the history and future of the Universe. The Standard Model for cosmology collects this knowledge along with some other elements as cosmological distances. Thus, the link between the theory and observations is performed through some basic cosmological distances as luminosity distance $D_L$ and angular diameter distance $D_A$. In this paper, Cosmic Lensing (CL) is presented. CL is a novel paradigm that demonstrates the inverse square law invariance within the FLRW geometry. In this way, CL reveals a new relationship between $D_L$ and $D_A$ in an expanding universe given by $D_L=D_A(1+z)$, opposed to the relation $D_L=D_A(1+z)^2$ established about a century ago and assumed by the Standard Model. In the same sense, a compatible surface brightness vs luminosity relation -- different from the one proposed by Tolman -- is derived from Cosmic Microwave Background (CMB) equations. As a consequence, previous cosmology methods and results entrusting on luminosity as observational data must be reviewed. The expansion rate and the relative densities of the dark components of the Universe, as dark matter and dark energy, should be revised within the new paradigm

The role of oblivion, memory size and spatial separation in dynamic language games

In this paper we present some multiagent simulations in which the individuals try to reach a uniform vocabulary to name spatial movements. Each agent has initially a random vocabulary that can be modified by means of interactions with the other agents. As the objective is to name movements, the topic of conversation is chosen by moving. Each agent can remember a finite number of words per movement, with certain strength. We show the importance of the forgetting process and memory size in these simulations, discuss the effect of the number of agents on the time to agree and present a few experiments where the evolution of vocabularies takes place in a divided range.This paper has been sponsored by the Spanish Interdepartmental Commission of Science and Technology (CICYT), project numbers TEL1999-0181, and TIC 2001-0685-C02-01

Event-driven grammars: Relating abstract and concrete levels of visual languages

The final publication is available at Springer via http://dx.doi.org/10.1007/s10270-007-0051-2In this work we introduce event-driven grammars, a kind of graph grammars that are especially suited for visual modelling environments generated by meta-modelling. Rules in these grammars may be triggered by user actions (such as creating, editing or connecting elements) and in their turn may trigger other user-interface events. Their combination with triple graph transformation systems allows constructing and checking the consistency of the abstract syntax graph while the user is building the concrete syntax model, as well as managing the layout of the concrete syntax representation. As an example of these concepts, we show the definition of a modelling environment for UML sequence diagrams. A discussion is also presented of methodological aspects for the generation of environments for visual languages with multiple views, its connection with triple graph grammars, the formalization of the latter in the double pushout approach and its extension with an inheritance concept.This work has been partially sponsored by the Spanish Ministry of Education and Science with projects MOSAIC (TSI2005-08225-C07-06) and MODUWEB (TIN 2006-09678)