1,720,989 research outputs found
Indenture between Orson Phelps and Calista M. Phelps and Owen Clifford
No full textIndenture of bargain and sale between Orson Phelps formerly of St. Catharines, but at the time of the transaction, was living in Buffalo, New York and Calista M. Phelps (his wife) and Owen Clifford of Grantham for lots numbered 12 and 13 in the 8th Concession in Grantham Township. The instrument no. is 3411, July 11, 1851
Rock slope stability analysis on the complex Livorno coastal cliff (Tuscany, Italy)
No full textThe landscape of the south coast of Livorno city (Tuscany, Italy) is characterized by sandstone headlands and sandy pocket beaches affected by serious stability problems. Lithological features and physical-chemical processes involve many slope failures concerning the sandstone cliff and extending all over the cliff height; these failures often threaten people and facilities. The most prominent positive relief landform is structurally controlled by three main closely spaced joint sets. The presence of lean- ing and collapsed rock blocks suggests that erosion and mass wasting maintain the cliff steepness and elevate risk conditions. The sandstone mechanical properties and discontinuity pattern have been investigated in order to determine the response of the rock mass to subaerial and ma- rine stresses. The sandstone outcrops were characterized according to the Rock Mass Rating (Bieniawski, 1989) and the Slope Mass Rating (Ro- mana, 1985; 1993). Such data has been reported in a GIS system in order to determine the landslide susceptibility of the cliff. Some numerical modelling, with a code at Distinct Element Method model, were carried out to evaluate stresses and displacement distribution near the free sur- face of a steep slope face, as a function of steepness, dip direction and rock mass quality. Then some fall simulations were carried out, to make a back analysis of previous events and to obtain a more general outline of possible movements. The results showed that rock mechanics and com- puter modelling can be effective tools in predicting the rock-mass stabili- ty, determining the mechanism by which blocks fall from steep slopes and their possible trajectories
Morphostructural, meteorological and seismic factors controlling landslides in weak rocks: The case studies of Castelnuovo and Ponzano (north east Abruzzo, central Italy)
Full text linkWe investigated the role of the morphostructural setting and seismic and meteorological factors in the development of landslides in the piedmont of the Abruzzo Apennines. In February 2017, following a heavy snow precipitation event and a moderate seismic sequence (at the end of the Central Italy 2016–2017 seismic crisis), several landslides affected the NE-Abruzzo chain and piedmont area. This work is focused on the Ponzano landslide (Civitella del Tronto, Teramo) and the Castelnuovo landslide (Campli, Teramo) in the NE Abruzzo hilly piedmont. These landslides consist of: (1) a large translational slide-complex landslide, affecting the Miocene–Pliocene sandstone clay bedrock sequence of the piedmont hilly sector; and (2) a complex (topple/fall-slide) landslide, which occurred along a high and steep scarp on conglomerate rocks pertaining to terraced alluvial fan deposits of the Pleistocene superficial deposits. Both of the landslides are typical of the Abruzzo hilly piedmont and both of them largely affected houses and villages located on top of the scarp or within the slope. The landslides were studied by means of field geological and geomorphological mapping, borehole investigations, geostructural analysis and photogeological analysis. For the Ponzano landslide, a detail pre-post-landslide air photo interpretation allowed for defining the deformation pattern occurred on the slope. For the Castelnuovo landslide, the triggering factors and the stability of the slope were evaluated with FLAC3D numerical modelling, in pre- and post-landslide conditions. Through this integrated analysis, the triggering factors, the landslide mechanism and the stability conditions of the landslides and the characterization of two main types of landslides affecting the piedmont hilly area of the Abruzzo region were investigated
Geomorphological features and 3D modelling of Montelparo mass movement (Central Italy).
No full textThe ancient village of Montelparo (Marche region, Central Italy) is affected by a large translational mass movement. The relief is modeled on
arenaceous and arenaceous-pelitic units overlying pelitic-arenaceous terrains; the bedding strata form a gently dipping monocline. The
translational slide is about 1100 m long and 500–700 m wide. The upper boundary between the stable area and the sliding mass is marked by a
large active trench near the hilltop. The main sliding surface is located at a depth ranging between 65 and 100 m, in the politic-arenaceous unit. We
studied the mechanism of the slope instability along the stratigraphic contact between a rigid arenaceous unit and an underlying ductile pelitic unit.
The uncovering of the contact caused by the intense downcutting processes of the river at the hill foot during the Holocene, favoured the onset of
the movement. This was enhanced by the fractured bedrock and especially by the jointing. We created a numerical model based on the finite
differences code FLAC_3D by using a specific approach for mesh generation. The model suggests a further enlargement and deepening of the
trench, and a sliding direction not aligned with the slope dip direction. Failure in the model concentrates at and around the main trench, all the
other elements staying in an elastic state and inducing a rigid sliding. The model shows that both the failure onset and the current evolutionary
state can be explained by the geological and static conditions of the slope
On the suitability of phillipsite-chabazite zeolitite rock for ammonia uptake in water: a case study from the Pescara River (Italy)
Full text linkIonic exchange tests have been performed on superficial wastewaters to remove ammonia using a volcanic zeolitized rock from Lazio Region (Central Italy). The zeolitite (natural zeolite) is characterized by chabazite, phillipsite and minor amounts of sanidine, leucite and analcime. After preliminary column experiments in laboratory focused to determine the saturation time of the zeolitite, a pilot plant was built up on a little water course near the area of San Giustino channel (Abruzzo Region, Central Italy). Wastewaters, characterized by starting ammonia value ranging between 5 and 120 mg/l, were filtered with a zeolitic bed. The first experimental results indicate a positive ammonia reduction of about 80–90% and, in all cases, NH4+ concentration values under the EU law limits. A main purpose of this paper is to evidence that most of studies published on uptake of ammonia by means of zeolitite lead with clinoptilolite-dominant zeolitite despite the large and best performance of phillipsite-chabazite zeolites (up to 61–79% improvement of ammonia uptake). Last but not least, a large number of published studies are of difficult comparison because of poor characterization of the zeolitite used
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
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