1,721,034 research outputs found
Workshop:"Seismic risk in Eastern Lombardy". "Rischio sismico nella Lombardia orientale" - December 5, 2006
No full textcuratela di una sessione speciale del Bollettino della Societa' Geologica Italiana, ISSN 0037-8763, Vol. 128, No.
The seismic potential of the Insubria region (Southern Alps): Insights from topographic and rheological modeling
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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
EEE Catalogue: A Global Database of Earthquake Environmental Effects
No full textThe recent destructive earthquakes that occurred in Japan (2011; e.g., Lay et al. 2013) and New Zealand (2010–2011 earthquake sequence; e.g., Quigley et al. 2012) have clearly pointed out that traditional seismic hazard assessment based only on vibratory ground motion data needs to be integrated with information about the local vulnerability of the territory to earthquake occurrence. Nowadays, a huge amount of information about the characteristics of Earthquake Environmental Effects (EEEs; i.e., any phenomena generated by a seismic event in the natural environment; Michetti et al. 2004, 2007; Guerrieri et al. 2007) is available for a very large number of earthquakes that occurred not only in the instrumental period and in historical time but also in the prehistorical period (paleoearthquakes, e.g., Mc Calpin 2009; Reicherter et al. 2009)
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
Stability Analysis of a Landslide Scarp by Means of Virtual Outcrops: The Mt. Peron Niche Area (Masiere di Vedana Rock Avalanche, Eastern Southern Alps)
Full text linkWe investigated the Mt. Peron niche area of the Masiere di Vedana rock avalanche (BL), one of the major mass movements that affected the Eastern Southern Alps in historical times. So far, a geomechanical characterization and a stability analysis of the niche area, where potential rockfall sources are present, are lacking. The Mt. Peron niche area is a rocky cliff almost inaccessible to field-based measurements. In order to overcome this issue, we performed a geo-structural characterization of a sector of the cliff by means of a UAV-based photogrammetric survey. From the virtual outcrop, we extracted the orientation of 159 fractures that were divided into sets based on a K-means clustering algorithm and field-checked with some measurements collected along a rappelling descent route down to the cliff. Finally, with the aim of evaluating the stability of the volume under investigation, we performed a stability analysis of three rock pillars included in our survey by means of a distinct element numerical simulation. Our results indicate that two out of the three pillars are characterized by a stable state, under the simulation assumptions, whereas the third is close to failure, and for this reason, its condition needs further investigation
A design of experiments approach to arsenic retention: Interactions between sediment properties and water chemistry
Full text linkThe mobility of arsenic (As) in groundwater is governed by dynamic interactions at the sediment-water interface, where both mineral reactivity and aqueous chemistry play key roles. In the Como aquifer (Northern Italy), As distribution is vertically heterogeneous: shallow horizons remain below the WHO limit of 10 mu g/L, whereas deeper zones reach concentrations up to 250 mu g/L. Although this variability is well documented, the underlying mechanisms remain only partially understood. To address this gap, we performed batch experiments on shallow and deep aquifer sediments with contrasting composition, systematically varying pH, electrical conductivity, and dissolved organic carbon in a full-factorial design of experiment. Results revealed nonlinear adsorption responses and sediment-specific behaviours. Shallow sediments exhibited stronger and more stable As retention, associated with higher contents of Fe-, Al-, and Mn-(hydr)oxides and greater cation exchange capacity. In contrast, deepaquifer sediments showed weaker and more variable adsorption, especially under acidic, DOC-enriched, and high-conductivity conditions. Response surface models confirmed that sediment composition governs As retention capacity, while water chemistry modulates its efficiency. This integrative approach links laboratory adsorption patterns with field-scale As distribution, providing a mechanistic explanation for the observed vertical heterogeneity in the Como aquifer and supporting predictive assessment of groundwater vulnerability
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