1,720,972 research outputs found
A new interpretation of the large-scale Alpepiana landslide (upper Aveto Valley, Northern Apennines) based on a field survey, gis applications, and integrated monitoring activities
No full textThis work aims to present the results of geomorphological studies and monitoring activities concerning the landslide
of Alpepiana (Aveto Valley) at the boundary of Liguria and Emilia-Romagna.
Alpepiana hamlet was built between 800 m and 1000 m a.s.l. on the foot of a relict slow-flow-type landslide which
represents the evolution of a large mass movement that originated from the southern slope of Mt. Oramara.
The landslide presents a lengthened shape extended over 2 km2 with direction NE-SW in the upper portion and NW-SE
in the lower.
Instability phenomena are well known since the Roman period, and the parish church was continually rebuilt due to
the movements of the landslide.
The geological setting of the area is characterized by the Ottone Unit (marly limestones etherophic to ophiolitic
sandstones and breccias), the Orocco Unit (marly limestones), and the Canetolo Unit (marls and limestones).
Fifteen boreholes have been drilled, and equipped with monitoring instrumentation, consisting of four inclinometers,
nine piezometers and two pumping wells. In addition, more than 600 m of seismic refraction have been acquired.
Hydrogeological and geotechnical field tests were carried out, and some laboratory tests were conducted in order to
improve our knowledge of the landslide material.
The phenomenon can be classified as a complex-flow type landslide, with a maximum depth of the landslide mass
exceeding 40 m in the central portion.
According to geological and geomorphological features, the Alpepiana landslide seems to be a deep-seated
gravitational slope deformation.
The observations during the field survey show evident signs of movement, as creep forms in soil at the surface level,
and structural damage can be seen in historical and recent buildings. Inclinometric monitoring activity, carried on from
1999 to 2000 and from 2001 to 2002, showed an average velocity of 10 cm/y, highlighting the slip surface’s depth,
ranging between 15 and 20 m.
The piezometric measurements identified an unconfined aquifer inside the landslide body, whose level doesn’t seem
to be directly related to rainfall events.
Back analysis carried out on the landslide cross section indicated a residual strength angle of 14°, apparently related
to the finer clayey component of the soil; therefore mineralogical XRD analysis was executed, showing a good relation
between clay minerals and geotechnical properties.
The government has intervened with drainage and forest management measures: nevertheless the results are not
exhaustive, because of the size of the landslide.
This study represents a contribution with the aim of developing the most effective interventions to increase the
stability of the slopes involved through a slow kinematic landslide
Fatigue crack growth of multiple interacting cracks: Analytical models and experimental validation
No full textThis article deals with the fatigue propagation of multiple cracks in finite width holed panels, which are typical of aircraft structural components. Theoretical studies in the literature have been considered and critically analyzed. Some of them have been translated into analytical models and implemented in a computer code. To check the effectiveness of the used models, a fatigue testing campaign has been conducted on six different configurations of notches and cracks. The comparison between experimental results and those obtained from the implemented models has shown a good agreement
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
Hippocampal electrical-activity and emotional behavior in rabbits living in a seminatural environment
No full textHazard assessment and risk management of San Rocco and Mortola landslides (Portofino Natural Park, Italy)
No full textDispelling 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
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