Discovery of arenig graptolites in the Rioseco Thrust-Sheet (Cantabrian 2one, N. of Spain)

[Resumen] En este trabajo se da a conocer el hallazgo de Azygograptus undulatus CHEN y XIA en un tramo pelítico-arenoso situado por encima de la Cuar,ita de Barrios s.str. dentro de la escama de Rioseco, que se equipara convencionalmente a la «serie de transición» de otras localidades asturianas. La especie mencionada permite atribuir al Arenig estos niveles, siendo la primera vez que se registra su presencia fuera de China.[Abstract] Graptolites have been collected for the first time from the «transitional beds» overlying the Barrios Formation (=.Armorican Quartzite) in a single locality of eastern Asturias (N. Spain), within the Cantabrian zone of the Hesperian Massif (fig. 1). The studied material pertains to a dichograptid species with singlestiped rhabdosome and distinctive prothecal folds (fig. 2). It has been identified and described as Azygograptus undulatus CHEN & XIA, constituting thus the first report of this species outside China

Improving NDT with Automatic Test Case Generation

The model-driven development defi nes the software development process as a set of iterations to create models and a set of transformations to obtain new models. From this point of view, this paper presents the enhancement of a model- driven approach, called navigational development techniques (NDT), by means of new models and transformations in order to generate test cases. It also states some conclusions from the research work and practical cases in which this approach was used.Ministerio de Ciencia e Innovación TIN2010-20057-C03-02Ministerio de Ciencia e Innovación TIN 2010-12312-

Fósiles

24 páginas, 43 fotos.-- En: Muñoz Barco, P. & Martínez Flores, E. (coord.).Peer reviewe

The Triple Higgs Boson Self-Coupling at Future Linear e+e- Colliders Energies: ILC and CLIC

We analyzed the triple Higgs boson self-coupling at future $e^{+}e^{-}$ colliders energies, with the reactions $e^{+}e^{-}\to b \bar b HH, t \bar t HH$. We evaluate the total cross-sections for both $b\bar bHH$ and $t\bar tHH$, and calculate the total number of events considering the complete set of Feynman diagrams at tree-level. We vary the triple coupling $\kappa\lambda_{3H}$ within the range $\kappa=-1$ and +2. The numerical computation is done for the energies expected to be available at a possible Future Linear $e^{+}e^{-}$ Collider with a center-of-mass energy $800, 1000, 1500$ $GeV$ and a luminosity 1000 $fb^{-1}$. Our analysis is also extended to a center-of-mass energy 3 $TeV$ and luminosities of 1000 $fb^{-1}$ and 5000 $fb^{-1}$. We found that for the process $e^{+}e^{-}\to b \bar b HH$, the complete calculation differs only by 3% from the approximate calculation $e^{+}e^{-}\to ZHH(Z\to b\bar b)$, while for the process $e^{+}e^{-}\to t \bar tHH$, the expected number of events, considering the decay products of both $t$ and $H$, is not enough to obtain an accurate determination of the triple Higgs boson self-coupling.Comment: 19 pages, 12 figure