350,789 research outputs found
The subzero microbiome: Microbial activity in frozen and thawing soils
No full textMost of the Earth's biosphere is characterized by low temperatures (<5 °C) and cold-adapted microorganisms are widespread. These psychrophiles have evolved a complex range of adaptations of all cellular constituents to counteract the potentially deleterious effects of low kinetic energy environments and the freezing of water. Microbial life continues into the subzero temperature range, and this activity contributes to carbon and nitrogen flux in and out of ecosystems, ultimately affecting global processes. Microbial responses to climate warming and in particular, thawing of frozen soils are not yet well understood although the threat of microbial contribution to positive feedback of carbon flux is substantial. To date, several studies have examined microbial community dynamics in frozen soils and permafrost due to changing environmental conditions, and some have undertaken the complicated task of characterizing microbial functional groups and how their activity changes with changing conditions, either in situ or by isolating and characterizing macromolecules. With increasing temperature and wetter conditions microbial activity of key microbes and subsequent efflux of greenhouse gases also increase. In this review, we aim to provide an overview of microbial activity in seasonally frozen soils and permafrost. With a more detailed understanding of the microbiological activities in these vulnerable soil ecosystems, we can begin to predict and model future expectations for carbon release and climate change.Peer reviewe
Sulle orme di Lawrence d'Arabia. Corrispondenze dal deserto di Max David
No full textPrima edizione di opera inedita del giornalista Max David nata da un'inchiesta del 1965 su Lawrence d'Arabia e la sue epopea in Giordania
Max M. Warburg Collection 1915-1938
No full textThis collection contains items related to the Max M. Warburg and his role in building the Jüdischen Gemeinschafthaus in Hamburg: correspondence, primarily between Max M.
Warburg and Dr. Martin Goldschmidt regarding the founding of the Jüdischen Gemeinschafthaus, a congratulatory letter from Dr. Goldschmidt on its founding; statutes of the Jüdischen
Gemeinschafthaus; flyer with pictures of the facilities of the Jüdischen Gemeinschafthaus; typewritten seven page opening speech on the founding of the Jüdisches Gemeinschafthaus
(1937-1938); letter from Max Warburg to the director of the Hamburger Kunsthalle, Professor Pauli (1936); letter to Dr. Weltsch from Max Warburg commenting on the status of Jews and
the law in Germany (1933); essay by Warburg entitled "Finanzielle Kriegslehren (1915); newspaper article about Warburg (circa 1937); sheet from census showing Warburg family
(1936); calling cards from Mrs. Max Warburg commenting on unspecified written piece (circa 1935).Banker, 1867-1946Processed for digitizationSent for digitizationReturned from digitizationLinked to online manifestationdigitize
Mission de M. Max Fazy à Rome
No full textFazy Max. Mission de M. Max Fazy à Rome. In: École pratique des hautes études, Section des sciences historiques et philologiques. Annuaire 1908-1909. 1908. p. 113
A methodology for deploying the max-sum algorithm and a case study on unmanned aerial vehicles
No full textWe present a methodology for the deployment of the max-sum algorithm, a well known decentralised algorithm for coordinating autonomous agents, for problems related to situational awareness. In these settings, unmanned autonomous vehicles are deployed to collect information about an unknown environment. Our methodology then helps identify the choices that need to be made to apply the algorithm to these problems. Next, we present a case study where the methodology is used to develop a system for disaster management in which a team of unmanned aerial vehicles coordinate to provide the first responders of the area of a disaster with live aerial imagery. To evaluate this system, we deploy it on two unmanned hexacopters in a variety of scenarios. Our tests show that the system performs well when confronted with the dynamism and the heterogeneity of the real world
Mission de M. Max Fazy en Belgique
No full textFazy Max. Mission de M. Max Fazy en Belgique. In: École pratique des hautes études, Section des sciences historiques et philologiques. Annuaire 1906. 1905. pp. 105-110
A Transfer Report on the Development of a Framework to Evaluate Search Interfaces for their Support of Different User Types and Search Tactics
No full textAs the understanding of search systems, user needs and seeking strategies is developing, the design of search user interfaces is evolving to support more complicated and exploratory forms of search. With the design of new search features that enable these richer modes of exploration, comes the need to better understand the support they provide. In this report a new evaluation framework is presented that analyses search features for how they a) contribute to an overall interface, b) allow users to carry out different search tactics, and c) support different types of users and their needs. The novel contributions of the framework improve on some of the limitations of typical user studies, and allow search systems to be systematically analysed in much more detail and in much less time. The presented evaluation framework is then validated in three ways. First the validity of the models used as the building blocks of the framework are investigated through related work. Second the method of integrating these building-block models is validated and strengthened by consensus of expert opinion. Third, the overall approach is validated by comparing its analyses to the results of previously carried out user studies. The validation process has shown both the value of the framework and identified areas of future work that should be addressed for the framework to be completed. This report concludes with the set of contributions that the framework makes, and why the remaining work will be challenging, but critical to the final design
Transcriptomic and proteomic response of the organohalide respiring bacterium Desulfoluna spongiiphila to growth with 2,6-dibromophenol as electron acceptor
No full textPeer reviewe
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