1,720,962 research outputs found
Taxonomic and phytoclimatic investigation on southern Albanian fir (Abies borisii-regis Mattf.)
No full textPrimi dati sugli effetti della temperatura sulla germinazione dei semi di Abies borisii-regis Mattfeld
No full textSystemic forestry in the Crimean Pine, Balkan Fir and Balkan Beech forests of Germenj-Shelegur, South-eastern Albania
No full textThe Germenj-Shelegur area, located near the Greek border of south-eastern Albania, covers a surface area of approximately 30,000 ha, 15,000 of which are made up of for-ests and 15,000 of upland meadow, mainly primary, and agricultural fields. A group of government-nominated experts has rightly regarded it as meriting protection, and has proposed that it be classified as a national park. The motivation for this proposal lies, in general terms, in the high levels of diversity found in the biotic component of the sys-tems present, and, in particular, in the role played by forests in protecting the water re-gime and soil, in the value of the landscape, which is decidedly alpine in nature, and in the production of a variety of woods, some of which are precious.
The forests are all of natural origin, and at lower altitudes are mainly made up of Crimean Pine, while higher altitudes, where the Pine is also present, also contain Balkan Fir and Balkan Beech.
Their specific composition, in terms of the layers present, is quite unique. This fact led us to design the study that would delineate the systemic forestry interventions with the aim, as is known, of increasing the functional efficiency of the ecosystems af-fected.
To make this objective more appropriate to the specificity of the forests in this study, the authors felt it was right to precede the part of this work dedicated to forestry interventions with an outline of the vegetation within these forests and a definition of the key compositional and structural features which characterise them
Improvement of the deciduos woods in the Prespa National Park, South-eastern Albania, and the Gargano National Park, North-eastern Apulia
No full textThe forest vegetation in the Prespa National Park in south-eastern Albania, and on the Gargano peninsula in north-eastern Apulia is mainly made up of deciduous oakwoods, Querco-carpinetum and Ostryo-carpinetum, which has rightly been recognised as being of particular interest in terms of wildlife, landscape and production.
Despite the degeneration which originated in the distant past, the uniqueness of the flora in both areas led us to base our study on an attempt to identify what sort of policies would be needed in order to improve the state of the woods.
The study thus involved outlining the physical components of the vegetational environment, and the groups of species present. This was followed by an analysis of the species and structural composition of the more representative groups, as well as surveys carried out in order to identify the phytosociological classes to which these communities can be attributed.
Attention was focused on the type of cultivation to use in the places studied, in order to enact specific forestry management plans
Preliminary results on the effects of temperature on Abies borisii-regis Mattfeld seeds germination
No full textRenaturalisation of the Mediterranean pinewoods planted along the Adriatic coastline of central Albania and southeran Apulia
No full textThe pine stands planted in the 19th century using Aleppo Pine and Stone Pine along the Adriatic coastline of what is now the Divjaka National Park in central Albania have long been subject to renaturalisation. Communities of winter-dormant deciduous broadleaf species have formed, including some tree species, with others of evergreen sclerophyllous species, generally made up of shrubs.
The study looked first into the geomorphological and climatic features of the area, and then into the compositional and structural aspects of the plant communities present, these also being considered in terms of their dynamics.
This study was the necessary premise for defining forestry policies to promote the further development of the processes outlined in this work.
The results obtained were compared with those from another research project on stands made up of the same species planted in the 1950s along the coasts on the other side of the Adriatic, in southern Apulia.
Despite initial forestry policies which were not always appropriate, these stands, too, have undergone renaturalisation processes, leading to the formation (still in its initial stages) of communities of sclerophyllous evergreen species, including tree species, and winter-dormant deciduous species, mainly shrubs.
The study concludes with reflections on the differences found between the renaturalisation processes in the pinewoods of the two areas
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
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