1,212 research outputs found
Helge S. Kragh, Conceptions of Cosmos [Book Review]
No full textHelge S. Kragh, historian of science and prolific author of books (and a member of the editorial board
of this journal), has given us nothing less than a thorough history of cosmology, from biblical myths to
the present view of accelerated expansion. It’s a noble thing to try, and even if it isn’t always perfectly
accurate, Conceptions of Cosmos makes a real contribution to the literature
I remember life as an Estonian at Seabrook
No full textIn this "I remember" memoir, Helge Kangur recalls her Estonian upbringing at Seabrook. She realizes now how fortunate she was to grow up in such a diverse community. The Seabrook Educational and Cultural Center has been soliciting current and past residents of Seabrook Farms for an "I remember" project. Residents are asked to create narratives regarding their experiences at Seabrook Farms. These memories help preserve the history and multi-cultural heritage of Seabrook Farms
Impact of a phytoplankton bloom on the diversity of the active bacterial community in the southern North Sea as revealed by metatranscriptomic approaches
No full textDespite their importance for ecosystem functioning, little is known about the composition of active marine bacterioplankton communities. Hence, this study was focused on assessing the diversity of these communities in the southern North Sea and examining the impact of a phytoplankton spring bloom on the ambient bacterioplankton community. Community composition in and outside the bloom was assessed in 14 samples by pyrosequencing-based analysis of 16S rRNA gene amplicons generated from environmental RNA. The data set comprised of 211769 16S rRNA gene sequences. Proteobacteria were the predominant phylogenetic group with Alphaproteobacteria and Gammaproteobacteria as the most abundant classes. Actinobacteria and Bacteroidetes were identified in minor abundances. Active bacterial communities were dominated by few lineages such as the Roseobacter RCA cluster and the SAR92 clade. Community structures of three selected samples were also assessed by direct sequencing of cDNA generated from rRNA-depleted environmental RNA. Generated data sets comprised of 988202 sequences. Taxonomic assignment of the reads confirmed the predominance of Proteobacteria. The examined phytoplankton spring bloom affected the bacterioplankton community structures significantly. Bacterial richness was reduced in the bloom area, and the abundance of certain bacterial groups was affected by bloom presence. The SAR92 clade and the Roseobacter RCA cluster were significantly more abundant and active in the bloom. Functions affected by the bloom include photosynthesis, protein metabolism, and DNA metabolism
The ECB's monetary analysis revisited
No full textMonetary aggregates continue to play an important role in the ECB's policy strategy. This paper revisits the case for money, surveying the ongoing theoretical and empirical debate. The key conclusion is that an exclusive focus on non-monetary factors alone may leave the ECB with an incomplete picture of the economy. However, treating monetary factors as a separate matter is a second-best solution. Instead, a general-equilibrium inspired analytical framework that merges the economic and monetary pillars of the ECB's policy strategy appears the most promising way forward. The role played by monetary aggregates in such unified framework may be rather limited. However, an integrated framework would facilitate the presentation of policy decisions by providing a clearer narrative of the relative role of money in the interaction with other economic and financial sector variables, including asset prices, and their impact on consumer prices. --ECB,monetary analysis,monetary pillar,New Keynesian model,DSGE model,P* model,Twopillar Phillips curve,VAR model,generalized dynamic factor model
Regeneration of Nothofagus dombeyi (Mirb.) Ørst. in little to moderately disturbed southern beech forests in the Andes of Patagonia (Argentina)
No full textNatural forests and stands subjected to little to moderate human impact are continuously declining worldwide and with these, their biodiversity and ecosystem services. Many Nothofagus forests in the south of the South American continent are in a pristine state or only moderately impacted by humans. Forest grazing by livestock, in the past and still today often practiced in a non-sustainable way is, however, increasingly under discussion to meet current environmental and socio-economic challenges. Accordingly, we investigate the regeneration of Nothofagus dombeyi, a keystone species of the Patagonian Andes, in secondary forests in Argentinian northern Patagonia, particularly addressing the role of disturbance through grazing by livestock at various intensities. We test the hypothesis that the regeneration of this tree species is favored by grazing impact and, thus, disturbance of the herb layer and soil surface. In support of our hypothesis, Nothofagus dombeyi regeneration was significantly higher in terms of individuals and height classes in moderately grazed forests. Multivariate analysis shows significant positive effects of moderate grazing pressure, herb layer cover, and the occurrence of bare soil on the regeneration of Nothofagus dombeyi. Our results show that an integration of livestock grazing and forest regeneration is possible and that agroforestry systems can be an adequate management option for stakeholders in the region. A grazing management can also be part of a forest fire prevention strategy. However, the regeneration success and grazing pressure should be continuously monitored.Fil: Zerbe, Stefan. Free University of Bozen-Bolzano; ItaliaFil: Storz, Stefanie T.. Universidad de Innsbruck; AustriaFil: Leitinger, Georg. No especifíca;Fil: Joelson, Natalia Zoe. Universidad de Innsbruck; AustriaFil: Bava, José. Centro de Investigación y Extensión Forestal Andino Patagónico; ArgentinaFil: Heinrichs, Steffi. No especifíca;Fil: Leuschner, Christoph. Centro de Investigación y Extensión Forestal Andino Patagónico; ArgentinaFil: Loguercio, Gabriel Angel. Centro de Investigación y Extensión Forestal Andino Patagónico; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Simon, Alois. No especifíca;Fil: Urretavizcaya, María Florencia. Centro de Investigación y Extensión Forestal Andino Patagónico; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Walentowski, Helge. No especifíca
Bacterial community dynamics during polysaccharide degradation at contrasting sites in the Southern and Atlantic Oceans
No full textThe bacterial degradation of polysaccharides is central to marine carbon cycling, but little is known about the bacterial taxa that degrade specific marine polysaccharides. Here, bacterial growth and community dynamics were studied during the degradation of the polysaccharides chitin, alginate and agarose in microcosm experiments at four contrasting locations in the Southern and Atlantic Oceans. At the Southern polar front, chitin-supplemented microcosms were characterized by higher fractions of actively growing cells and a community shift from Alphaproteobacteria to Gammaproteobacteria and Bacteroidetes. At the Antarctic ice shelf, chitin degradation was associated with growth of Bacteroidetes, with 24% higher cell numbers compared with the control. At the Patagonian continental shelf, alginate and agarose degradation covaried with growth of different Alteromonadaceae populations, each with specific temporal growth patterns. At the Mauritanian upwelling, only the alginate hydrolysis product guluronate was consumed, coincident with increasing abundances of Alteromonadaceae and possibly cross-feeding SAR11. 16S rRNA gene amplicon libraries indicated that growth of the Bacteroidetes-affiliated genus Reichenbachiella was stimulated by chitin at all cold and temperate water stations, suggesting comparable ecological roles over wide geographical scales. Overall, the predominance of location-specific patterns showed that bacterial communities from contrasting oceanic biomes have members with different potentials to hydrolyse polysaccharides.German Research Foundation, DFG [WI3888/1-1, NI1366/1-1, TRR51
Renaissancen og middelalderen som periodiseringsbegreber:et essay
No full textThe essay discusses the traditional and the occasionally exaggerated use of periodisations in general historical studies. The terms 'the Middle Ages' and 'the Renaissance' have had very long and complicated histories of their own. Of the two terms "the Middle Ages", which was originally a pejorative expression, has appeared to be the strongest of the two, whereas the term 'the Renaissance' has had a much more chaotic history in historiography. During the last 150 years of historical writing and thinking it has gone from the highest success (due to Burchardt 1861) to the deepest downfall (around 1930). The author argues for the preservation of the term 'the Renaissance' for three reasons: (1) The period of the Renaissance coincides with the emergence of the modern, strong power state (from the 14th and 15th centuries onwards) in contrast to the medieval, decentralized, feudal political system, (2) the break-through of the secularisation of science, the humanities, culture and art (during the 15th and 16th centuries), and not in the least (3) the new consciousness of history (the here and now concept!), which arose in Italy in the 15th century, and which broke the millennial, traditional Christian explanation of the course of history
CCDC 1547724: Experimental Crystal Structure Determination
No full textAn entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.,Related Article: Jon B. Nielsen, Petra Zylka, Marc Kronberg, Xiaoqing Zeng, Kerry D. Robinson, Simon G. Bott, Hongming Zhang, Jerry L. Atwood, Heinz Oberhammer, Helge Willner, Joseph S. Thrasher|2017|J.Mol.Struct.|1132|11|doi:10.1016/j.molstruc.2016.05.08
First experience with a new tool for automatic mapping of fragmented signals in a case report of cardioneuroablation
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