1,721,377 research outputs found
Tarjeta Postal de Silvio Longhi a Pedro Dorado Montero
No full textTarjeta Postal de D. Silvio Longhi a D. Pedro Dorado Montero, enviándole un trabajo suyo y solicitando una copia de unas notas bibliográficas aparecidas en La España Moderna
The glacial history since the Last Glacial Maximum in the Forni Valley (Italian Central Alps). Reconstruction based on Schmidt's Hammer R-values and crystallinity ratio indices of soils
No full textKnowledge about deglaciation after the Last Glacial Maximum (LGM) in the mountain areas of the European Alps is still limited. In this study, we used Schmidt Hammer R-values (SH) and Crystallinity Ratio (CRF) indices of soils, together with historical data, to outline the glacial evolution of the Forni Glacier the biggest Italian glacier until some years ago, from the LGM to the present. The study area is in the Italian Central Alps, which has a well-known history after the LIA but many gaps before. By comparing results from the Forni Glacier and nearby Gavia Pass, we found that weathering rates may differ for the same lithology; therefore, SH requires a local calibration curve. A total of 6 different glacial phases were found in the study area before the LIA: 15 ka (phase I), 12.2 ka (phase II), 9.5 ka (phase III), 4.1 ka (phase IV), 3.2 ka (phase V), and 1.5 ka (phase VI). Phase I and phase II are common glacial phases in the Alps. Phase III was the biggest Holocene advance and the following were smaller than the LIA, accordingly to what happened in Triftjegletscher, a glacier on the northern side of the Alps with a similar catchment morphology. In the close Gavia Pass area, phase both phase III and phase V were larger than the LIA, suggesting that catchment morphology was more important than proximity for controlling Holocene glacial evolution. Interestingly, phase IV is rare in the Alps, but is contemporary to the 4 ka cold event. It was finally possible to identify the maximum of the LIA expansion in 1810 CE and this agree with recent studies that collocate one of the peaks of the LIA in the Alps in the first half of the 1800
Reconstruction of the glacial history after the Last Glacial Maximum in the Italian Central Alps using Schmidt's hammer R-values and crystallinity ratio indices of soils
No full textDespite the ongoing development of cosmogenic techniques to reconstruct deglaciation and glacial advances, these techniques are not always feasible for logistical and economic reasons. In this study, we used Schmidt Hammer R-values (SH) and Crystallinity Ratio (CRF) indices of soils, together with a limited number of absolute 14C dates, to outline the glacial evolution of the Gavia Valley. The study area is a sector of the Italian Central Alps with a glacial history that is poorly understood. Methodologically, we found that SH can be successfully applied to Late Pleistocene surfaces younger than 15ka in this Alpine region. The SH method generally underestimates the ages with respect to the CRF indices and the 14C dates. A total of 7 different glacial phases were found in the study area: 14.7ka (I phase), 13.7ka (II phase), 12.2–11.8ka (III phase), 10.2–9.7ka (IV phase), 7.5ka (V phase), 5.5ka (VI phase), 1.9ka (VII phase). These phases are generally consistent with the literature; however, the Little Ice Age was surely less extended respect the other Holocene advances (V and VI phase). This suggests that relatively short climatic variations during the Holocene were locally important
Religioni e spazi ibridi nella città contemporanea: profili di metodo e di storiografia
No full textReligious places are a privileged observation lens in analyzing the super-diversity of the urban fabric. Besides being worship places, they are multiform spaces of cultural, social, and economic practices. In Italy, due to the absence of an adequate legislative framework, such religious places are often at the crossroad between visibility and invisibility, formality and informality, as well as functional specialization and hybridization; which make up the theme of reflections of this paper.
The paper proposes two dynamics of hybridization in order to foster and facilitate interdisciplinary research. The first one, the so-called “multi-religious places” or “shared places”, refers to places that were previously secular but have become temporarily religious places as well as to those places which pass from one religion to another in terms of shared place, temporal partitioning or overlapping. The second one refers to religious places, predominantly of historical and artistic interest, in which the worship activities were ceased and are used by communities for various activities, including hybrid functions
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
The use of iron chemical analysis of podzols to date the Late Pleistocene–Holocene deglaciation history of the Central Italian Alps
No full textPodzols that have developed on glacial and periglacial features provide the opportunity to reconstruct glacial evolution after the Last Glacial Maximum (LGM) using different soil indices. Analysing 17 soils classified as podzol, we used the crystallinity ratio of free iron oxides (CRF) on both the A and Bs horizons, and absolute ages for the same landforms containing the soil profile, to create dating curves. Two equations were generated: age = 4566.9 × ln (CRF) + 1760 (1), and age = 3907 × ln (CRF) + 3508.2 (2). The reliability of the curves was evaluated with the Feo/Fed ratio, and with the difference of ages calculated using both equations. Equation (2) is considered more reliable because the A horizon may be influenced by new pedogenesis on the pre-existing podzol, leading to the development of a new type of soil. By dating the soils, we reconstructed the glacial history of the three main upper branches of the LGM Adda Glacier in the Central Italian Alps, specifically the Stelvio Pass area (ST), Gavia Pass area (GV), and the Val Viola valley (VV). Seven glacial advances were identified at 16.7–14.7 ka (phase I), 12.3 ka (phase II), 11 ka (phase III), 10–9.7 ka (phase IV), 9 ka (phase V), 7.5 ka (phase VI) and 5.3 ka (phase VII). The first five phases are chronologically similar to the main Late Pleistocene–Early Holocene phases recorded in the Central European Alps. The last two Holocene phases, which are both longer in duration than the Little Ice Age, are recorded in ST and GV. Interestingly, these phases generally are not recorded in the rest of the Central European Alps, where the late Holocene glaciers were smaller than their present size
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