Simulated emergence of cyclic sexual-asexual reproduction

Motivated by the cyclic pattern of reproductive regimes observed in some species of green flies (``{\it aphids}''), we simulate the evolution of a population enduring harsh seasonal conditions for survival. The reproductive regime of each female is also seasonal in principle and genetically acquired, and can mutate for each newborn with some small probability. The results show a sharp transition at a critical value of the survival probability in the winter, between a reproductive regime in the fall that is predominantly sexual, for low values of this probability, or asexual, for high values.Comment: 9 pages, 4 figures, requires RevTe

Evidence on Financial Globalization and Crisis: Geographic/Bilateral External Balance Sheets

This article reviews the main sources of data on the geographic composition of countries' external balance sheets, covering both international and country-specific sources. It examines the determinants of bilateral financial assets and liabilities and discusses how gravity models, traditionally used in the trade literature, have been applied to explain bilateral financial links. A new dataset is used to derive some stylized facts on how bilateral financial links look like, how they have evolved over time and how they compare with trade links. The role that cross-border financial links play in the international transmission of shocks is discussed, with reference to the 2007-2009 financial crisis

Unitarized pion-nucleon scattering amplitude from inverse amplitude method

In a recent work on low energy pion-nucleon scattering, instead of using chiral perturbation theory (ChPT) amplitude, we started from a pion-nucleon {\it soft-pion} result and used elastic unitarity directly as a dynamical constraint to construct first-order unitarity corrected amplitudes. The resulting amplitudes are crossing symmetric but, as the ChPT ones, satisfy only approximate unitarity relation. In the present work, we reconsider our approach and we apply the inverse amplitude method (IAM) in order to access the energy resonance region. We present the resulting S- and P-wave phase shifts that are shown to be in qualitative agreement with experimental data.Comment: 6 pages, 3 figure

Justification of Sexual Reproduction by Modified Penna Model of Ageing

We generalize the standard Penna bit-string model of biological ageing by assuming that each deleterious mutation diminishes the survival probability in every time interval by a small percentage. This effect is added to the usual lethal but age-dependent effect of the same mutation. We then find strong advantages or disadvantages of sexual reproduction (with males and females) compared to asexual cloning, depending on parameters.Comment: 4 pages, 2 figures, submitted to Physica

Polytropic stars in three-dimensional spacetime

We investigate three-dimensional perfect fluid stars with polytropic equation of state, matched to the exterior three-dimensional black hole geometry of Banados, Teitelboim and Zanelli. A new class of exact solutions for a generic polytropic index is found and analysed.Comment: 3 pages, revte

O Auto da Compadecida - A Dog's Will: an analysis of the translation of idioms in the English subtitle

TCC (Graduação) - Universidade Federal de Santa Catarina. Centro de Comunicação e Expressão. Letras Inglês.The objective of this study is to analyse the English subtitles of the Brazilian film O Auto da Compadecida – A Dog’s Will (Arraes, 2000) – in order to verify which strategies were used in the translation of idioms and fixed expressions. The choices of translation strategies were described based on concepts discussed within Translation Studies (TS). The results reveal that despite the technical constraints of subtitling, especially with regard to time and space, the translator managed to use strategies, albeit varied, that reproduced the idioms in the subtitles, which shows an understanding of the important role of these elements in the mood of the film. / / / Este trabalho tem como objetivo analisar as legendas em língua inglesa do filme brasileiro O Auto da Compadecida (Arraes, 2000) a fim de verificar quais estratégias foram utilizadas na tradução de expressões idiomáticas. As escolhas de estratégias de tradução foram descritas com base em conceitos discutidos no campo dos Estudos da Tradução. Os resultados revelam que apesar das limitações técnicas da legendagem, especialmente com relação ao tempo e espaço, o tradutor conseguiu usar estratégias, embora variadas, que reproduziram as expressões idiomáticas nas legendas, o que mostra uma compreensão do importante papel destes elementos no espírito do filme

Hyla multifasciata

Number of Pages: 4Integrative BiologyGeological Science