Asymptotic Behavior of the Einstein-Yang-Mills-Dilaton System for a Closed Friedmann-Lemaitre Universe

We study the coupled Einstein-Yang-Mills-Dilaton (EYMD) equations for a Fried\-mann-Le\-mai\-tre universe with constant curvature $k=1$. Our detailed analysis is restricted to the case where the dilaton potential and the cosmological constant vanish. Also assuming a static gauge field, we present analytical and numerical results on the behavior of solutions of the EYMD equations. For different values of the dilaton coupling constant we analyze the phase portrait for the time evolution of the dilaton field and give the behavior of the scale factor. It turns out that there are no inflationary stages in this model.Comment: 18 pages, Uuencoded gzip compressed tar file containing a latex file and 12 figures. The epsfig.sty is neede

ASYMPTOTIC BEHAVIOR OF COMPLEX SCALAR FIELDS IN A FRIEDMAN-LEMAITRE UNIVERSE

We study the coupled Einstein-Klein-Gordon equations for a complex scalar field with and without a quartic self-interaction in a curvatureless Friedman-Lema\^{\i}\-tre Universe. The equations can be written as a set of four coupled first order non-linear differential equations, for which we establish the phase portrait for the time evolution of the scalar field. To that purpose we find the singular points of the differential equations lying in the finite region and at infinity of the phase space and study the corresponding asymptotic behavior of the solutions. This knowledge is of relevance, since it provides the initial conditions which are needed to solve numerically the differential equations. For some singular points lying at infinity we recover the expected emergence of an inflationary stage.Comment: uuencoded, compressed tarfile containing a 15 pages Latex file and 2 postscipt figures. Accepted for publication on Phys. Rev.

Evolution of the Bianchi I, the Bianchi III and the Kantowski-Sachs Universe: Isotropization and Inflation

We study the Einstein-Klein-Gordon equations for a convex positive potential in a Bianchi I, a Bianchi III and a Kantowski-Sachs universe. After analysing the inherent properties of the system of differential equations, the study of the asymptotic behaviors of the solutions and their stability is done for an exponential potential. The results are compared with those of Burd and Barrow. In contrast with their results, we show that for the BI case isotropy can be reached without inflation and we find new critical points which lead to new exact solutions. On the other hand we recover the result of Burd and Barrow that if inflation occurs then isotropy is always reached. The numerical integration is also done and all the asymptotical behaviors are confirmed.Comment: 22 pages, 12 figures, Self-consistent Latex2e File. To be published in Phys. Rev.

BLOOM: A 176B-Parameter Open-Access Multilingual Language Model

Large language models (LLMs) have been shown to be able to perform new tasks based on a few demonstrations or natural language instructions. While these capabilities have led to widespread adoption, most LLMs are developed by resource-rich organizations and are frequently kept from the public. As a step towards democratizing this powerful technology, we present BLOOM, a 176B-parameter open-access language model designed and built thanks to a collaboration of hundreds of researchers. BLOOM is a decoder-only Transformer language model that was trained on the ROOTS corpus, a dataset comprising hundreds of sources in 46 natural and 13 programming languages (59 in total). We find that BLOOM achieves competitive performance on a wide variety of benchmarks, with stronger results after undergoing multitask prompted finetuning. To facilitate future research and applications using LLMs, we publicly release our models and code under the Responsible AI License

Microbiología - Modelo teórico para una vacuna efectiva contra la infección por Helicobacter pylori

The Gram-negative rod Helicobacter pylori is a human gastric pathogen that causes many several diseases such as gastritis, Peptic and duodenal ulcer, and gastric. Worldwide distribution and a highest incidence, in adition to a premature adquisition leads to the research and development of prophylactic measures to avoid the infection. We proposed two theorical pathways for a vaccine model against H. pylori, in order to prevent colonization and conducting the immune response to the development of immunological memory and an effective IgG response.Helicobacter pylori es una bacteria gramnegativa que habita la mucosa gástrica humana, es causante de diversas patologías tales como gastritis, úlcera gástrica y duodenal, adenocarcinoma gástrico y linfoma MALT, por lo que se clasifica como carcinógeno de tipo I según la O.M.S. Presenta una amplia distribución e incidencia a nivel mundial y se adquiere desde edades tempranas de la vida. Por lo cual es importante plantear medidas profilácticas, tanto en recién nacidos como en individuos de cualquier edad que estén exentos de la bacteria, para evitar infección, patologías e inconvenientes del tratamiento frente a H. pylori. Partimos de esto para formular dos modelos teóricos de vacunas efectivas contra este microorganismo, basados en evitar la adhesión de la bacteria para impedir el desarrollo de respuesta inmune y en dirigir la respuesta inmune del hospedador para inducir memoria inmunológica y una efectiva respuesta de Inmunoglobulina G

Dictionnaire des conventions

Comment penser l'économie autrement ? Depuis trente ans, des chercheurs de différentes disciplines participent au développement d’une économie des conventions qui construit une nouvelle représentation de l’économie. Les 75 auteurs réunis dans cet ouvrage fournissent un éclairage exceptionnel sur cette approche à partir des travaux de l’un de ses principaux artisans, Olivier Favereau. Plus que tout autre économiste, il a œuvré tout au long de sa carrière aux échanges interdisciplinaires pour renouveler notre compréhension des phénomènes économiques. Les différentes entrées de ce dictionnaire non standard discutent, utilisent ou prolongent ces travaux. Le lecteur dispose ainsi d’une introduction sans équivalent aux débats contemporains sur l’évolution des savoirs économiques : les nouvelles représentations de l’entreprise, du travail, de la finance et plus généralement des comportements économiques et de leur dimension politique.How to think the economy otherwise? For thirty years, researchers from different disciplines involved in the advent of the French convention school

BLOOM: A 176B-Parameter Open-Access Multilingual Language Model

Large language models (LLMs) have been shown to be able to perform new tasks based on a few demonstrations or natural language instructions. While these capabilities have led to widespread adoption, most LLMs are developed by resource-rich organizations and are frequently kept from the public. As a step towards democratizing this powerful technology, we present BLOOM, a 176B-parameter open-access language model designed and built thanks to a collaboration of hundreds of researchers. BLOOM is a decoder-only Transformer language model that was trained on the ROOTS corpus, a dataset comprising hundreds of sources in 46 natural and 13 programming languages (59 in total). We find that BLOOM achieves competitive performance on a wide variety of benchmarks, with stronger results after undergoing multitask prompted finetuning. To facilitate future research and applications using LLMs, we publicly release our models and code under the Responsible AI License