1,720,977 research outputs found
New records for the Laga Mountains (Marche, Abruzzo, Lazio) and the central Apennines
No full textThis study includes 47 species collected between 1980 and 2012, most of them not previously reported for the Laga
Mountains. These include a number of species that are rare or are of particular phytogeographical interest, with their
presence hereby confirmed. In particular, the survey includes one new species for the central Apennines (Aconitum variegatum
subsp. variegatum), seven for Marche (Alchemilla exigua, Alchemilla marsica, Alchemilla sinuata, Alchemilla
undulata, Alchemilla versipila, Equisetum variegatum, Juncus articus), two for Abruzzo (Aconitum variegatum subsp.
variegatum, Alchemilla incisa), and one for Lazio (Veronica alpina). The presence in the central Apennines of Oxytropis
pilosa subsp. pilosa is also confirmed; although it has already been reported in several studies, it has been neglected in
recent floras. In agreement with previous scientific contributions, the present study confirms the considerable biogeographical
interest of the area due to the presence of species with an Arctic-Alpine distribution and/or of European orophytes,
as well as species that are endemic to the mountain range of the Laga Mountains, which represents the southern
limit of their distribution along the whole Apennine range
First record of Rhizomatophora aegopodioides (Apiaceae) in Italy
Get PDFThe occurrence of Rhizomatophora aegopodioides, a species distributed in the Balkan Peninsula, Greece, southern Caucasus, Turkey and southern Russia, is reported here for the first time in Italy. It was discovered in Calabria (southern Italy) in the Argentino River Valley and along the Abatemarco River (municipality of Cosenza), localities partly included within the Pollino National Park. Information about taxonomy, nomenclature, habitat, phytosociology and distribution of this species in Italy are provided
Floristic–Vegetational Features of Geranium argenteum, an Alpine–Apennine Species at Its Limit of Distribution in the Apennines
Get PDFWe present a floristic–vegetational study on a plant community dominated by Geranium argenteum in the Sibillini Mountains (Central Apennines), at the southern limit of its distribution in the Apennines. It is a rare pioneer community located at an elevation of about 2100 m a.s.l. with northern exposure on the fractured rocky ridges and at the edges of the rocky detrital valleys on lithosol, with a prolonged presence of snowpack and gelifraction processes. The results of the phytosociological analysis allow us to propose the new Festuco italicae-Geranietum argentei association referred to as the Leontopodio nivalis-Elynion myosuroidis alliance (Carici rupestris-Kobresietea bellardii class). The comparison with the Alpine and the Northern Apennines phytocoenoses characterized by Geranium argenteum allows us to provide a new interpretation of the syntaxonomical framework concerning the Geranium argenteum communities within its Alpine–Apennine range in light of the new data presented in this paper. The new Festuco italicae-Geranietum argentei association represents a further contribution to the knowledge of the relict alpine vegetation of the Leontopodio nivalis-Elynion myosuroidis alliance in the Sibillini Mountains and thus in the Central Apennines. Finally, habitat monitoring will be essential for assessing the impacts of climate change on this fragile and narrowly restricted plant community
Le collezioni botaniche
No full textLe prime notizie sulla presenza di erbari a Camerino risalgono al 1600 circa. Il riferimento più antico è quello relativo ad un erbario datato fine XVI - inizio XVII secolo, già descritto da Alberico Benedicenti, farmacologo italiano di grande fama e docente nelle Università di Cagliari, Camerino, Messina e Genova.
Un’altra testimonianza è rappresentata da un libro-erbario anonimo attribuibile alla seconda metà del ‘700 e contenente 155 piante. Si tratta di un libro rilegato a mano, in discreto stato di conservazione, rivestito da una copertina rigida di carta pecora, con scritto, sulla costola, “Erbario naturale”. Le piante sono fissate con listarelle di carta e colla di farina. Sui fogli di carta lavorata a mano del tipo “velino vergato”, prodotta dalle cartiere di Fabriano, con impresso, nel mezzo, uno stemma filigranato non è indicata la località di raccolta perché, probabilmente, fungeva da “guida” per la determinazione; tra le piante presenti Polium montanum (Teucrium polium), Gallium luteum (Galium verum), Digitalis minor (Digitalis micrantha)
Cartografia geobotanica del Dipartimento di Botanica ed Ecologia di Camerino
No full textPresentazione delle tipologie di cartografia tematica geobotanica della "scuola" camerinese
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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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