1,720,996 research outputs found
Oltre l'età antica: gli assetti del Vimercatese nel Medioevo
No full textL'articolo traccia un quadro di sintesi delle vicende che hanno interessato il territorio vimercatese nel Medioevo e ne definisce, in termini diacronici, gli assetti via via assunti sotto il profilo della rete viaria, del paesaggio agrario, dell'organizzazione ecclesiastica e delle strutture per il controllo e la difesa, utilizzando come fonti, oltre che i monumenti superstiti e i reperti archeologici ritrovati in zona, anche una preziosa gamma di testimonianze archivistiche e toponomastiche
La pieve di Vimercate e l'organizzazione ecclesiastica del territorio
No full textSotto il profilo dell'organizzazione ecclesiastica, nel Medioevo il territorio vimercatese face capo a due diversi distretti plebani: quello di Vimercate, che comprendeva circa 30 località, e quello di Pontirolo, con più di 20 località, di cui 12 pertinenti al territorio vimercatese. Il saggio prende in esame la struttura, le vicende, gli edifici pertinenti alla pieve di Vimercate nel periodo compreso tra il V-VI secolo e il XVI secolo, definendone, in un quadro di sintesi, tutti gli aspetti salienti e caratterizzanti
Compound-Specific Isotope Analysis (CSIA) Application for Source Apportionment and Natural Attenuation Assessment of Chlorinated Benzenes
Full text linkIn light of the complex management of chlorobenzene (CB) contaminated sites, at which
a hydraulic barrier (HB) for plumes containment is emplaced, compound-specific stable isotope
analysis (CSIA) has been applied for source apportionment, for investigating the relation between
the upgradient and downgradient of the HB, and to target potential CB biodegradation processes.
The isotope signature of all the components potentially involved in the degradation processes has been
expressed using the concentration-weighted average 13C of CBs + benzene (13Csum). Upgradient of
the HB, the average 13Csum of 25.6‰and 29.4‰were measured for plumes within the eastern
and western sectors, respectively. Similar values were observed for the potential sources, with
13Csum values of 26.5‰for contaminated soils and 29.8‰for the processing water pipeline in
the eastern and western sectors, respectively, allowing for apportioning of these potential sources to
the respective contaminant plumes. For the downgradient of the HB, similar CB concentrations but
enriched 13Csum values between 24.5‰and 25.9‰were measured. Moreover, contaminated
soils showed a similar 13Csum signature of 24.5‰, thus suggesting that the plumes likely originate
from past activities located in the downgradient of the HB. Within the industrial property, significant
13C enrichments were measured for 1,2,4-trichlorobenzene (TCB), 1,2-dichlorobenzene (DCB),
1,3-DCB, and 1,4-DCBs, thus suggesting an important role for anaerobic biodegradation. Further
degradation of monochlorobenzene (MCB) and benzene was also demonstrated. CSIA was confirmed
to be an effective approach for site characterization, revealing the proper functioning of the HB and
demonstrating the important role of natural attenuation processes in reducing the contamination
upgradient of the HB
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Multi-Technique groundwater flow system analysis and dating of deep aquifers in Alessandria Basin (Piedmont - IT)
No full textThe aim of the study was to set up a protection system from pollution of the deep aquifer of the Alessandria basin, by redefining the recharge areas, focused on this portion of Piedmont territory, and therefore by creating some reserve areas of deep groundwater, to be preserved for future human drinking purposes. In addition to the classical hydrodynamic and geochemical monitoring techniques, the groundwaters were analyzed with reference to a monitoring network of 25 selected wells with deep screens (80-300 m below ground surface) combining radiochemical dating (C-14 and delta C-13 of dissolved inorganic carbon - DIC) with anthropogenic tracers (CFCs, SF6) as indicators of recent recharge/mixing. Stable isotope composition (delta H-2 and delta O-18 - H2O) was assessed during a 1-year sampling of snow-rain precipitations gauges distributed in altitude in order to define Local Meteoric Water Lines; the isotopic composition was also seasonally measured for the main rivers and in selected deep-wells. The 3D numerical model was implemented in FEflow platform and calibrated on the basis of the available monitoring data; it was used as a support tool in the delimitation of the recharge areas, starting from the analysis of the distribution of flows. This model was crucial for delimiting the "reserve areas", since it was able to simulate groundwater flows using both purely advective transport conditions (particle tracking technique), and more realistic conditions of advective and dispersive transport, by introducing dispersive parameters and using the Life Time Expectancy (LTE) reservoir distribution. The integrated use of "traditional" techniques of regional groundwater flow system monitoring (hydrochemistry, stable isotopic composition) and of dating techniques based on radioactive isotopes and anthropogenic tracers, provided a reliable support to the validation of flow and transport simulation model, oriented to identify recharge areas and "reserve areas" of future extraction of deep groundwater for drinking purpose
- …
