La Argentina a finales de la época del caballo : Imaginaciones literarias de los medios modernos de transporte y de sus efectos culturales

Para el historiador Koselleck, «el fin de la época del caballo» cuenta entre los cambios más profundos de la historia moderna. En Argentina y Uruguay, donde el gaucho montado es un símbolo de la identidad nacional, este cambio tiene una importancia particular. Por eso, no sorprende que la literatura rioplatense de los siglos XIX y XX se preocupe con frecuencia de la modernización de los medios de transporte y de sus efectos culturales. Por un lado, presenta una retrospectiva de la época del caballo que destaca sus valores estratégicos y simbólicos; por otro lado, observa e imagina las transformaciones de la percepción subjetiva y de la interacción social bajo el impacto de las comunicaciones modernas. Este trabajo intenta aclarar algunos casos ejemplares (Sarmiento, Martínez Estrada, Quiroga) a la luz del concepto de la "mediación técnica" propuesto por Latour

ANALISANDO A RELAÇÃO DOS VOLUMES DE EXPORTAÇÃO E DE IMPORTAÇÃO, PIB, TAXAS DE CÂMBIO E INFLAÇÃO NO PERÍODO DE 2004 A 2014.

Esta dissertação visa deslumbrar uma análise macroeconômica do Brasil, especialmente no que se refere à relação dos índices mensais dos volumes das exportações e das importações com os volumes mensais do PIB, da Taxa SELIC e as Taxas de Câmbio, conforme dados coletados no período de janeiro de 2004 a dezembro de 2014, através de pesquisa literária referente aos históricos sobre cada conceito envolvido no âmbito da macroeconomia das varáveis estudadas. Foi realizado um estudo de caso embasado em dados de sites governamentais, no período delimitado, empregando-se o método de regressão linear, com base na Teoria da correlação de Pearson, demonstrando os resultados obtidos no período do estudo para as varáveis estudadas. Desta maneira, conseguiu-se estudar e analisar como as variáveis dependentes (resposta): volume das exportações e volume das importações estão relacionadas com as varáveis independentes (explicativas): PIB, Taxa Selic e taxa de Câmbio. Os resultados apurados no presente estudo permitem identificar que existe correlação moderada e negativa, quando analisadas a Taxa Selic e a Taxa de Câmbio com os volumes das exportações e das importações, enquanto o PIB apresenta correlação forte e positiva na análise com os volumes das exportações e das importações

A neuronal β subunit (KCNMB4) makes the large conductance, voltage- and Ca2+-activated K+ channel resistant to charybdotoxin and iberiotoxin

Large conductance voltage and Ca2+-activated K+ (MaxiK) channels couple intracellular Ca2+ with cellular excitability. They are composed of a pore-forming α subunit and modulatory β subunits. The pore blockers charybdotoxin (CTx) and iberiotoxin (IbTx), at nanomolar concentrations, have been invaluable in unraveling MaxiK channel physiological role in vertebrates. However in mammalian brain, CTx-insensitive MaxiK channels have been described [Reinhart, P. H., Chung, S. & Levitan, I. B. (1989) Neuron 2, 1031–1041], but their molecular basis is unknown. Here we report a human MaxiK channel β-subunit (β4), highly expressed in brain, which renders the MaxiK channel α-subunit resistant to nanomolar concentrations of CTx and IbTx. The resistance of MaxiK channel to toxin block, a phenotype conferred by the β4 extracellular loop, results from a dramatic (≈1,000 fold) slowdown of the toxin association. However once bound, the toxin block is apparently irreversible. Thus, unusually high toxin concentrations and long exposure times are necessary to determine the role of “CTx/IbTx-insensitive” MaxiK channels formed by α + β4 subunits.

Sex differences in selection of pacemakers: retrospective observational study

Objective: To evaluate the effect of patients’ sex on selection of pacemakers.

Cloning, expression, and distribution of a Ca(2+)-activated K+ channel beta-subunit from human brain.

We have cloned and expressed a Ca(2+)-activated K+ channel beta-subunit from human brain. The open reading frame encodes a 191-amino acid protein possessing significant homology to a previously described subunit cloned from bovine muscle. The gene for this subunit is located on chromosome 5 at band q34 (hslo-beta). There is no evidence for alternative RNA splicing of this gene product. hslo-beta mRNA is abundantly expressed in smooth muscle, but expression levels are low in most other tissues, including brain. Brain subregions in which beta-subunit mRNA expression is relatively high are the hippocampus and corpus callosum. The coexpression of hslo-beta mRNA together with hslo-alpha subunits in either Xenopus oocytes or stably transfected HEK 293 cells give rise to Ca(2+)-activated potassium currents with a much increased calcium and/or voltage sensitivity. These data indicate that the beta-subunit shows a tissue distribution different to that of the alpha-subunit, and in many tissues there may be no association of alpha-subunits with beta-subunits. These beta-subunits can play a functional role in the regulation of neuronal excitability by tuning the Ca2+ and/or the voltage dependence of alpha-subunits.

Preliminary human factors guidelines for automated highway system designers. Volume I: guidelines for AHS designers.

Federal Highway Administration, Washington, D.C.

Scriptorum Arabum loci de Abbadidis nunc primum

Arabic texts followed by Latin translations.

Scriptorum arabum loci de Abbadidis /

Contiene : Vol. 2.

Recherches sur l'histoire et la littérature de l'Espagne pendant le Moyen Age /

Contiene: T. I -- T. II.

Catalogus codicum orientalium Bibliothecae Academiae Lugduno Batavae auctore R. P. A. Dozy ...

Vol. 6, "Pars prior." No more published?

Tom Grogan,

Mode of access: Internet.

Catalogus codicum orientalium Bibliothecae Academiae Lugduno-Batavae /

Menc. de resp. varía: T. I y II, R. P. A. Dozy, T. III y IV, P. de Jong y M. J. de Goeje, T. V, M. J. de Goeje.

The town officer's guide, containing a compilation of the general laws of Massachusetts, relating to the whole power and duty of towns, districts, and parishes, with their several officers; with a digest of the decisions in the Supreme Judicial Court of Massachusetts, relating to the several subjects.

Mode of access: Internet.