1,720,960 research outputs found
Analisi strutturale ed evolutiva in acero-frassineti di neoformazione delle Valli di Lanzo (TO)
No full textIn the Lanzo Valley (N.W Piedmont, Italy), 8 ash maple secundary stands with trees 5-35 years old have been studied. Seedlings start immediately after the abandonment and stop after 5-10 years. The stand densities are very high in every phases of the forest's growth. The stands are always dominated by one species: ash on former meadows and maple on former fields. Among the other species present as mother trees, beech neither takes part to the invasion of fallow land, nor regenerate even 30 years after the abandonment. Grassland vegetation persists for a very long time: more than 10 years after abandonment grass species are still dominant in the undergrowth. In the same time the development of nitrophilous species has been observed. A tipical forest vegetation is present after 30-35 years from the abandonment. Generally secundary ash-maple stands have a good ecological and structural stability
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
The Application of a Ship Synthesis Model (SSM) for the Trade-off Study of Offshore Patrol Vessel
No full textIn the naval ship design and acquisition process, especially at an early stage, is increasingly crucial the application of computational tools, able to tackle the main ship characteristics and their interactions for the assessment of different design solutions in a reasonable time. The most comprehensive use of such computational tools is, undeniably, the possible interface with a cost estimating module and a performance evaluator with the aim to better lead the concept exploration process.
The Ship Synthesis Model (SSM) can be an useful computational tools/approach in this exploration process: it allows to select a subset of feasible ship configurations which satisfy the settled requirement, evidencing the balancing of different functions, often affected by conflicting constraints.
In fact, beside design requirements (speed, endurance, crew members, payload...), it permits to identify several design parameters (L,B, form coefficients, propulsion and diesel enerator plants,...), together with their functional relations and functional constraints. Then different balances in terms of propulsion and electric power, weights, volumes and areas are worked out.
In the proposed paper an SSM code is presented together with an application case, in terms of trade off analysis for an offshore patrol vessel design. The sensitivity analysis of the SSM tool has been performed in relation with different ship requirements
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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