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Search Results: 1 - 10 of 44857 matches for " Michael Sprenger "
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The Tiara in the Tiber. An Essay on the damnatio in memoria of Clement III (1084-1100) and Rome’s River as a Place of Oblivion and Memory The Tiara in the Tiber. An Essay on the damnatio in memoria of Clement III (1084-1100) and Rome’s River as a Place of Oblivion and Memory
Kai-Michael Sprenger
Reti Medievali Rivista , 2012, DOI: 10.6092/1593-2214/342
Abstract: From classical antiquity forward, a tradition developed in Rome of throwing the corpses of one’s political enemies into the Tiber as an act of damnatio memoriae or deletio memoriae. Clement III (Wibert of Ravenna) met this unenviable fate. Pope Paschal II ordered that his remains be exhumed and thrown into the Tiber so that no trace of him would remain, either for future liturgical remembrance or for veneration by his followers, who regarded him as a saint, rather than as a dead antipope. This essay asks whether Clement’s burial in the Tiber was carried out clandestinely or as an act of high political symbolism: a purification ritual witnessed by the public. It also sketches the lines of this tradition from the Roman period to the present, underlining the specific political contexts in which such acts of intended damnatio and deletio memoriae occurred. The word intended is crucial, as the Tiber, paradoxically, often turned out to be not so much an instrument of oblivion, which erased all memory of the condemned, as the stage upon which a particular tradition of recollection took shape. By means of public political acts and rituals purportedly undertaken to delete memory, memories of dead political enemies were instead rendered inelible by forming – always before the public eye – a negative or deliberately defaming memory, a damnatio in memoria. A partire dalla antichità classica, a Roma si sviluppò la tradizione di gettare nel Tevere i cadaveri dei nemici politici quale atto di damnatio memoriae o di deletio memoriae. Clemente III (Guiberto di Ravenna) incorse in questo destino poco invidiabile. Papa Pasquale II ordinò di esumare i suoi resti e di gettarli nel Tevere così che non rimanesse traccia di lui, né per una futura memoria liturgica, né per una venerazione da parte dei suoi seguaci, che lo consideravano un santo piuttosto che un antipapa morto. Questo saggio si interroga se questa “sepoltura” nel Tevere sia avvenuta clandestinamente o come un atto di alto simbolismo politico: una purificazione rituale con un pubblico a far da testimone. Il saggio tratteggia anche lo sviluppo di questa tradizione dall’età romana fino ai giorni nostri, sottolineando gli specifici contesti politici in cui avvennero tali atti di intenzionale damnatio e deletio memoriae. L’aggettivo “intenzionale” è cruciale, dal momento che il Tevere, paradossalmente, rivelava spesso di costituire non tanto uno strumento di oblio, che cancellava radicalmente la memoria del condannato, quanto lo scenario su cui una particolare tradizione di ricordo prendeva forma. Tramite atti po
Dynamical Tropopause Variability and Potential Vorticity Streamers in the Northern Hemisphere ---A Climatological Analysis
Dynamical Tropopause Variability and Potential Vorticity Streamers in the Northern Hemisphere —— A Climatological Analysis

Olivia MARTIUS,Cornelia SCHWIERZ,Michael SPRENGER,
Olivia MARTIUS
,Cornelia SCHWIERZ,Michael SPRENGER

大气科学进展 , 2008,
Abstract: This study presents a 44-year climatology of potential vorticity (PV) streamers in the Northern Hemi sphere based upon analyses of the ERA-40 reanalysis data set. A comparison to an existing 15-year clima tology yields very good agreement in the locations of PV streamer frequency maxima, but some differences are found in the amplitude of frequencies. The climatology is assessed with the focus on links between PV streamer frequencies and the synoptic- and planetary-scale variability of the dynamical tropopause. A comprehensive overview is provided on where (zonally) and when (seasonally) short-term variability throughout the extra-tropical and sub-tropical tropopause is enhanced or reduced. Several key processes that influence this variability are discussed. Baroclinic processes, for example, determine the variability in the storm-track areas in winter, whereas the Asian summer monsoon significantly influences the variability over Asia. The paper also describes links between the frequency of PV streamers in the extra-tropical and sub tropical tropopause and three major northern hemisphere teleconnection patterns. The observed changes in the PV streamer frequencies are closely related to concomitant variations of PV and its gradient within the tropopause region. During opposite phases of the North Atlantic Oscillation the location of the streamer frequency maxima shifts significantly in the Atlantic and European region in both the extra-tropics and subtropics. The influence of ENSO on the streamer frequencies is most pronounced in the subtropical Pacific.
The Renegade Subjectivist: Jose Bernardo's Objective Bayesianism
Jan Sprenger
Rationality, Markets and Morals , 2012,
Abstract: This article motivates and discusses JosE Bernardo's attempt to reconcile the subjective Bayesian framework with a need for objective scientific inference, leading to a special kind of objective Bayesianism, namely reference Bayesianism. We elucidate principal ideas and foundational implications of Bernardo's approach, with particular attention to the classical problem of testing a precise null hypothesis against an unspecified alternative.
Mérimée’s Literary Anthropology: Residual Sacrality and Marital Violence in "Lokis"
Scott Sprenger
Anthropoetics : the Journal of Generative Anthropology , 2009,
Abstract:
Balzacas Anthropologist
Scott Sprenger
Anthropoetics : the Journal of Generative Anthropology , 2000,
Abstract:
In the End was the Word: Balzac's Modernist Absolute
Scott Sprenger
Anthropoetics : the Journal of Generative Anthropology , 2001,
Abstract:
Search for new physics in events with opposite-sign dileptons and missing transverse energy with the CMS experiment
Sprenger Daniel
EPJ Web of Conferences , 2012, DOI: 10.1051/epjconf/20122812011
Abstract: The results of a search for new physics in events with two opposite-sign isolated electrons or muons, hadronic activity, and missing transverse energy in the final state are presented. The results are based on analysis of a data sample with a corresponding integrated luminosity of 0.98 fb 1 produced in pp collisions at a center-of-mass energy of 7 TeV collected by the CMS experiment at the LHC. No evidence for an event yield beyond Standard-Model expectations is found, and constraints on supersymmetric models are deduced from these observations.
Erratum
Sprenger Daniel
EPJ Web of Conferences , 2012, DOI: 10.1051/epjconf/20122812072
Abstract:
A new circulation type classification based upon Lagrangian air trajectories
Alexandre M. Ramos,Michael Sprenger,Heini Wernli,Ana M. Durán-Quesada,Luis Gimeno
Frontiers in Earth Science , 2014, DOI: 10.3389/feart.2014.00029
Abstract: A new classification method of the large-scale circulation characteristic for a specific target area (NW Iberian Peninsula) is presented, based on the analysis of 90-h backward trajectories arriving in this area calculated with the 3-D Lagrangian particle dispersion model FLEXPART. A cluster analysis is applied to separate the backward trajectories in up to five representative air streams for each day. Specific measures are then used to characterize the distinct air streams (e.g., curvature of the trajectories, cyclonic or anticyclonic flow, moisture evolution, origin and length of the trajectories). The robustness of the presented method is demonstrated in comparison with the Eulerian Lamb weather type classification. A case study of the 2003 heatwave is discussed in terms of the new Lagrangian circulation and the Lamb weather type classifications. It is shown that the new classification method adds valuable information about the pertinent meteorological conditions, which are missing in an Eulerian approach. The new method is climatologically evaluated for the 5-year time period from December 1999 to November 2004. The ability of the method to capture the inter-seasonal circulation variability in the target region is shown. Furthermore, the multi-dimensional character of the classification is shortly discussed, in particular with respect to inter-seasonal differences. Finally, the relationship between the new Lagrangian classification and the precipitation in the target area is studied.
Model-based analysis of an adaptive evolution experiment with Escherichia coli in a pyruvate limited continuous culture with glycerol
Ronny Feuer, Katrin Gottlieb, Gero Viertel, Johannes Klotz, Steffen Schober, Martin Bossert, Oliver Sawodny, Georg Sprenger, Michael Ederer
EURASIP Journal on Bioinformatics and Systems Biology , 2012, DOI: 10.1186/1687-4153-2012-14
Abstract: Since the long term evolution experiment of Lenski et al. [1], laboratory evolution has attracted much attention [2]. They demonstrated the adaptive behavior of mircoorganisms through shaking flask experiments with regular transfer in fresh culture media [1]. Already, Hoefle et al. [3] reported the presence of selective pressure in chemostat experiments. In the fermentation process, the adaptive evolution of the organisms occurs through random genetic mutation and controlled selection [4]. This process exhibits considerable potential for the design of industrial production strains [5]. Small product yields, slow growth, evolutive instability of mutated strains or toxicity of byproducts are limiting factors that are expected to be tackled with adaptive evolution [6]. Additionally, understanding of how environmental conditions shape the metabolism can be enhanced through adaptive evolution. A fine-tuning of enzyme expression levels balancing the cost and burden of protein production was demonstrated by Dekel et al. [7]. The genetic basis for such short-term evolutions has been intensely studied by using genome resequencing technology [8]. However, the genetic basis of adaptations is not always obvious. For example, a rewiring of the regulatory network is reported to be a source of adaptation [9] in the tolerance of E. coli to ethanol. Models for evolving regulatory networks were developed by Crombach et al. [10] and Xie et al. [11]. Constraint-based models of the metabolism are already in use for predicting maximal yields of organisms and optimal outcomes of adaptive evolution [12].Here, we present the concept of an adaptive evolution experiment in a bioreactor. In such a process, the evolutive pressure on the microorganisms for either fast growth or optimal biomass yield on a limiting substrate can be used to attain or improve the production of a desired compound. Motivated to know possible endpoints of the evolution experiment, we developed an algorithm for computin
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