1,785 research outputs found
Studies of exotic quarkonium states at CMS
No full textUsing large data samples of dimuon events in pp collisions at 7~TeV, CMS has performed studies in the field of ``exotic'' quarkonium spectroscopy. The production of the X(3872) is studied measuring the ratio of the X(3872) and (2S) cross sections times their branching fractions into J as a function of transverse momentum (). In addition, the fraction of X(3872) originating from B decays is determined. From these measurements the prompt X(3872) differential cross section times branching fraction as a function of is extracted. The mass spectrum of the J system in the X(3872) decays is also investigated. Preliminary studies on structures in the J mass spectrum of the exclusive decays are reported
The ant fauna of Castelporziano Presidential Reserve (Rome, Italy) as a model for the analysis of ant community structure in relation to environmental variation in Mediterranean ecosystems
No full textAnts are often used as ecological indicators in environmental monitoring programs, but rarely in Europe, probably because of a lack of baseline knowledge on the relationship between ant community structure and environmental variation. We present this baseline knowledge for Italian ecosystems that are typical of the Mediterranean climate, in order to assess the value of ants as ecological indicators in this biogeographic zone. Sampling areas were selected inside the Castelporziano Natural Reserve (Rome, Italy). The elevated variety of habitats and diverse ecological conditions, as well as the different levels of human impact in the Reserve, make this area a suitable location to develop and test biological indicators of environmental quality. The ant community structure was compared among several Mediterranean ecosystems using pitfall trapping, multidimensional scaling, the indicator species analysis and the Functional Groups Approach. Key factors for differences in ant community structure seem to be the presence/absence of water, the level of light and microhabitat diversity. Our results suggest that Castelporziano is an informative area in order to develop a study model for the Italian ant fauna and the Functional Group Approach is a promising procedure to associate differences in ant community structures with differences in habitat stress and disturbance
Fig. 4 in The ant fauna of Castelporziano Presidential Reserve (Rome, Italy) as a model for the analysis of ant community structure in relation to environmental variation in Mediterranean ecosystems
No full textFig. 4 Multidimentional scaling performed on abundance ranks of ant species during May and July 2006. Symbols represent the 28 transects analysed (see text for details) and they are sorted according to trapping periodPublished as part of Cristina Castracani, Donato A. Grasso, Alberto Fanfani & Alessandra Mori, 2010, The ant fauna of Castelporziano Presidential Reserve (Rome, Italy) as a model for the analysis of ant community structure in relation to environmental variation in Mediterranean ecosystems, pp. 585-594 in J Insect Conserv 14 on page 591, DOI: 10.1007/s10841-010-9285-3, http://zenodo.org/record/100030
Distributed Data Management in CMS
No full textWithin 5 years CMS expects to be managing many tens of petabytes of data in tens of sites around the world. This represents more than order of magnitude increase in data volume over existing HEP experiments. This presentation will describe the underlying concepts and architecture of the CMS model for distributed data management, including connections to the new CMS Event Data Model. The technical descriptions of the main data management components for dataset bookkeeping, data location and file access will be presented. In addition we will present our first experience in using the system in preparation for a CMS data challenge in summer 2006
Sostanze Grasse Animali e Vegetali: Aspetti Qualitativi dei Prodotti Biologici
No full textThe aim of this study was to compare the effects of traditional and organic agricultural, feeding and breeding systems on the quality of lipids from animal and vegetable origin. The study was divided into three main sections: 1) evaluation of extra virgin olive oils obtained from olives produced by conventional and organic agricultural systems; 2) evaluation of liposoluble minor components obtained from soybeans and barley seeds produced by conventional and organic agricultural systems; 3) effects of different breeding and feeding systems on cholesterol oxidation and sterol content of freeze-dried egg yolks.
In general, slight, no significant differences were found between lipids from animal and vegetable products obtained by conventional and organic systems. Nevertheless, these results correspond to only one set of experiments, which could have been influenced by the particular weather conditions of the 2003 harvest. Therefore, this set of data should be considered as preliminary, but they represent a good starting basis for further studies in this field. More research is required in this area and it would be advisable to evaluate vegetable products from different harvest years, in order to draw valid conclusions
Lettera di Alessandra
No full textUn ritratto critico dell'opera di Alessandra Carnaroli, autrice fra le più apprezzate delle ultime generazioni della poesia di ricerca. La sezione a lei dedicata, nel numero della rivista, contiene inoltre saggi di Cecilia Bello Minciacchi, Andrea Cortellessa, e Ivan Schiavone; e vari inediti dell'autrice. Il saggio è pubblicato con lo pseudonimo di Tommaso Ottonieri.A critical portrait of the work of Alessandra Carnaroli, author of the most appreciated in the latest generations of italian research poetry. Published under the pseudonym Tommaso Ottonieri
Selected letters of Alessandra Strozzi
No full textThe letters of Alessandra Strozzi provide a vivid and spirited portrayal of life in fifteenth-century Florence. Among the richest autobiographical materials to survive from the Italian Renaissance, the letters reveal a woman who fought stubbornly to preserve her family's property and position in adverse circumstances, and who was an acute observer of Medicean society. Her letters speak of political and social status, of the concept of honor, and of the harshness of life, including the plague and the loss of children. They are also a guide to Alessandra's inner life over a period of twenty-three years, revealing the pain and sorrow, and, more rarely, the joy and triumph, with which she responded to the events unfolding around her.This edition includes translations, in full or in part, of 35 of the 73 extant letters. The selections carry forward the story of Alessandra's life and illustrate the range of attitudes, concerns, and activities which were characteristic of their author
Competition for foraging resources and coexistence of two syntopic species of Messor harvester ants in Mediterranean grassland
No full text1. Diet composition of two syntopic species of Messor seed-harvester ants (M. wasmanni Krausse and M. minor Andre) was evaluated during different periods over the year (May, July, October), by analysing food type (plant parts and species) and food size (weight, length, width). Morphological traits of foragers (head width and femur length) considered important features promoting diet partitioning were measured. 2. We used two robust randomisation algorithms (RA2 and RA3), adopted in niche overlap studies, to check for random vs non random utilisation of resources at intra- and interspecific level for the different periods. 3. Analyses showed high levels of overlap in the diet of the two species and no evidence of interspecific competition during most of the activity season. In particular, there was an aggregated use of resources in summer, whilst niche partitioning and evidence of competition when resources decreased in autumn. Intraspecifically, no evidence of competition was found. 4. Results suggest two different mechanisms for minimising competition: when food resources are abundant (summer), ants collected the same plant species but selected different sizes; when food resource is scarce (autumn), ants foraged on different plants. 5. The importance of different factors (morphological, behavioural, ecological) possibly affecting competition and coexistence are discussed
Challenging the author: Gavin Douglas's Eneados
No full textGavin Douglas’s Eneados, a translation into the “Scottis” tongue of Virgil’s Aeneid, completed in 1513 and first published in London in 1553, presents, as well as the translation of the additional thirteenth book by Maphaeus Vegius, original prologues and marginal notes to the text, rubrics and articulate conclusive material. The present paper analyses this complex paratext as evidence of Douglas’s almost philological attention to the original and his preoccupation with a faithful reproduction; it is also suggested that the models for his organization of the commentary might be both medieval (i.e., manuscripts such as Petrarch’s Virgilius Ambrosianus) and early modern, as in the case of editions of classical works: the most apt example being Jodocus Badius Ascensius’ edition of the Aeneid, printed in 1501. The Eneados thus stands on the threshold between manuscript and print, and might have indicated new possibilities of use of the printing medium in Scotland, and of the value of the translation of a classical text, had history not intervened with the Scottish defeat at Flodden Fields in 1513, which put a temporary stop both to the circulation of the Eneados and to the development of Scottish printing
Enhancing CMS data analyses using a distributed high throughput platform
No full textA flexible and dynamic environment capable of accessing distributed data and resources efficiently, is a key aspect for HEP data analysis, especially for the HL-LHC era. A quasi-interactive declarative solution, like ROOT RDataFrame, with scale-up capabilities via open-source standards like Dask, can profit from the "HPC, Big Data and Quantum Computing" Italian Center DataLake model under development. The starting point is a prototypal CMS high throughput analysis platform, offloaded on local Tier-2.
This contribution evaluates the scalability, identifies bottlenecks and explores the interactivity of such platform, on two use-cases: a CMS physics analysis with high-rate triggered events and a study of the CMS muon detector performance in phase-space regions driven by analysis needs, accessing detector datasets. The metrics used to evaluate the scaling and speed-up performance will be reported and results will be discussed, emphasising the differences with the legacy analysis workflows
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