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Le foreste dei cacciatori paleolitici. Ambiente e popolamento umano in Cansiglio tra Tardoglaciale e Postglaciale.
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Ricostruzione della Storia della vegetazione padana fra l'Età del Bronzo e l'Alto medioevo in relazione all'intervento antropico. La successione pollinica del fossato della terramara di Poviglio
No full textGeomorphological evidence for land cleared from forest in the central Po plain (Northern Italy) during the Roman period
No full textIL TARDOGLACIALE NELLE ALPI ITALIANE E IN PIANURA PADANA. EVOLUZIONE STRATIGRAFICA, STORIA DELLA VEGETAZIONE E DEL POPOLAMENTO ANTROPICO
No full textViene presentato un quadro di sintesi dell’evoluzione stratigrafica e paleoambientale nel Tardoglaciale (19 – 11,5 mila anni cal BP) e
dei suoi rapporti con il popolamento antropico sul versante meridionale delle Alpi e in Pianura Padana, basato su successioni stratigrafiche
ad alta risoluzione e dotate di datazioni radiometriche. Dopo il ritiro dei ghiacciai dagli anfiteatri pedemontani e dai grandi
laghi prealpini, nella prima parte del Tardoglaciale si verifica il collasso dei ghiacciai entro le vallate alpine, accompagnate da una
intensa evoluzione dei fondovalle e dei versanti in ambiente paraglaciale. In questo intervallo, che registra le prime installazioni antropiche
al piede delle Prealpi, la vegetazione forestale era limitata alle aree stabili del settore pedemontano, agli anfiteatri deglaciati in
corso di colonizzazione e alle aree prossimali della pianura, mentre i settori distali dei megaconoidi erano in attiva aggradazione. Con
l’inizio (14,5±0,2 mila anni cal BP) dell’interstadio di Bølling –Allerød, le foreste avanzarono rapidamente fino a 1700-1800 metri. Gli
effetti del riscaldamento sono rilevabili da un aumento di produttività dei sistemi lacustri e palustri nelle Alpi. Gli insediamenti epigravettiani
si portano nella fascia montana delle Alpi orientali. In conseguenza dei mutamenti ecologici durante gli interstadiali, ha inizio la
colonizzazione epigravettiana delle Prealpi e delle Dolomiti e si verifica la diffusione di insediamenti differenziati per posizione altimetrica
e orientamento funzionale. Nella seconda parte dell’interstadio si diffusero latifoglie termofile. La culminazione di quest’ultima fase
coincise con la deposizione del Laacher See Tephra (13 – 12,9 mila anni cal BP) e precedette di due secoli l’inizio del Dryas recente,
che pertanto appare sincrono con il centro-Europa. Gli effetti del Dryas Recente nel bacino padano sono riconducibili a condizioni climatiche
continentali quasi semiaride, con stagioni molto contrastate. Nella seconda metà del Dryas Recente inizia una fase complessa
di avanzata dei ghiacciai (stadi di Egesen, Kartell, Kromer), che interessa anche i primi due millenni dell’Olocene. Allo stato attuale, i
dati archeologici non sono in grado di rilevare l’impatto del Dryas Recente sulle dinamiche insediative
Plant‐human interactions: from pristine forest to Bronze Age farming—vegetation history and depositional processes of‐shore the lake dwelling of Lavagnone, N‐Italy
No full textHere, we present a comparative analysis of micro- and macrobotanical remains deposition in the small, shallow lake Lavagnone, which hosted a long-lasting Bronze Age pile dwelling in the southern Alpine foothills. We obtained a narrative of the vegetation history and a framework for plant depositional processes by compositional changes of micro/macro assemblages, co-registered off-shore, near to a lake dwelling site, naturally accumulated in a stable water column reached by domestic dumps. Data analysis has been supported by ecological grouping and multivariate ordination. The record spans the time of pristine forest surrounding the lake prior to the pile dwelling foundation (5530–2080 cal bc), a dramatic biodiversity reversal at the settlement foundation, and the subsequent development of farming and animal husbandry, recorded by an expansion of dry arable fields and pasture vegetation (2080–1470 cal bc). This long-term trend is likely the product of decreased soil water balance due to erosion of alfisol argillic horizons by overgrazing and hillslope ploughing. The near-site dynamic of plant deposition during the settlement phase consists of several episodes of dumping plant debris and faeces from dwelling in alternating layers with still natural, aquatic assemblages. Dump microfossils are predominantly represented by pollen and domestic charcoal, while macrofossils (seeds/fruits and macrocharcoal) mainly consist of food refuse, crop processing by-products, kitchen waste, cleaning remains of fireplaces, decayed faeces, etc. thrown directly into the water from the stilt houses and dispersed on the bottom of the lake
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
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