1,721,257 research outputs found
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
Effects of canopy opening on height and diameter growth in naturally regenerated beech seedlings
No full textIn order to analyze the growth dynamics of beech seedlings growing under contrasting canopy conditions, a beech stand in which two types of canopy opening (canopy release or gap creation) had been applied in 1995 was selected. Three and four years after the canopy had been opened, 113 naturally regenerated seedlings were sampled in gaps or under the canopy. The effects of canopy opening and seedling age on annual height and diameter growth were analyzed using mixed models. Under closed canopy, average annual seedling height and diameter increments were 1.2 cm and 0.18 mm, respectively. Diameter growth increased in the first year after the canopy had been opened, and exhibited considerable inter-annual variation related to climatic conditions. Conversely, height growth did not increase immediately after canopy opening, but increased regularly in the following years. Four years after the gap had been created, annual seedling height and diameter growth were 9.5 cm and 0.49 mm respectively in the gaps, and 3.8 cm and 0.21 mm respectively under released canopy. Age did not affect the dynamics of seedling growth.La dynamique de croissance de jeunes semis de hêtre poussant dans les conditions de couvert contrastées a été étudiée dans un peuplement à base de hêtre dans lequel deux types d'ouverture du peuplement ont été réalisés. En 1995, un simple relevé de couvert a été effectué dans l'ensemble du peuplement et des trouées ont été ouvertes dans certaines parties. En 1998 et 1999, 113 semis naturels de hêtre ont été récoltés sous couvert ou dans les trouées. Les effets combinés de l'ouverture du couvert et de l'âge des semis sur la croissance en hauteur et en diamètre des semis ont été analysés à l'aide de modèles linéaires mixtes. Les semis sous couvert présentaient un accroissement annuel en hauteur de 1,2 cm et un accroissement annuel en diamètre de 0,18 mm. La croissance en diamètre a augmenté dès la première année après l'ouverture du couvert et a ensuite montré de fortes variations inter-annuelles liées à des variations climatiques. En revanche, l'augmentation de la croissance en hauteur à la suite de l'ouverture du peuplement n'a pas été immédiate, et a continué de manière progressive dans les quatre années suivantes. Quatre ans après l'ouverture du peuplement, les accroissements annuels en hauteur en en diamètre étaient de 9,5 cm et 0,49 mm respectivement pour les semis dans les trouées et de 3,8 cm et 0,21 mm respectivement pour les semis sous relevé de couvert. La croissance des semis n'est pas apparue liée à l'âge
Effects of canopy opening on the morphology and anatomy of naturally regenerated beech seedlings
No full textBeech (Fagus sylvatica L.) seedlings growing under contrasting canopy closure conditions (gaps vs closed canopy) were collected in a naturally regenerating stand of northeastern France. Seedling morphology [total height, basal diameter, number of growth units (GUs), length of GUs] and anatomy (width of the pith and width of the annual rings at seedling base and at various levels along the stem) were described. Seedling ages, as estimated by counting the number of rings at seedling base and by counting the number of GUs along the stem, were compared. Seedling age ranged between 1 and 19 years. The best method for determining the age of seedlings with reduced growth appeared to be GU counting, whereas the best method for determining the age of actively growing seedlings was ring counting. No effect of seedling age on any parameter of seedling growth was found. The degree of canopy closure strongly affected seedling growth. Seedlings sampled in gaps were larger and allocated more biomass to secondary than to primary growth, compared to seedlings sampled under closed canopy. However, the increase in secondary growth relative to primary growth was only significant when analysing annual growth increment (GU length and ring width) and was not statistically significant when comparing seedling final size (total height and basal diameter)
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
- …
