1,720,960 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
Distribució i ecologia dels macròfits submergits del delta de l'Ebre
Full text linkData on distribution and phenology of 16 species of submerged macrophytes in the Ebro Delta are given, together with a summarized table of some physical and chemical parameters
of the waters where they were found. The distribution of the spermatophytes in relation to the salinity of the water is: freshwater (Nasturtium officinale and Myriophyllum
verticillatum), β-oligohaline waters, up to 1 g
Cl- l-1 (Ceratophyllum demersum, M.
spicatum, Utricularia vulgaris, Potamogeton nodosus, P. pusillus, P. crispus, Zannichellia palustris and Najas minor). Oligo-β-mesohaline waters, up to 4 g Cl- l-1, (Najas marina).
Mixohaline waters, 0,5-17 g Cl- l-1 (Potamogeton pectinatus, Ruppia maritima and Ruppia
Cirrhosa). α-meso-polyhaline waters, 5-17 g - l-1 (Zostera noltii and Z. Marina). The submerged spermatophytes that are dominant in the coastal lagoons in the freshwater period (April-December) are: P. pectinatus, R. Cirrhosa and N. Marina. It seems that in α-oligohaline waters these enter into competition with each other. Field observations suggest that
Najas dominate in clay and organic mud areas, P. pectinatus in silty-clay sediments and Ruppia in those of sandy composition
Roser Nos: la zoologia al servei de la ciutadania
No full textRoser Nos Ronchera (1924-2018) és un bon exponent de científica capaç de superar, amb gran tenacitat, un reguitzell d’adversitats
per desenvolupar una llarga i notable carrera. Nascuda en un poble petit i allunyat, es va veure obligada a estudiar magisteri, però amb el
temps va acabar obtenint a la Universitat de Barcelona la titulació desitjada en el camp de les ciències naturals, amb premi extraordinari,
en un context de postguerra i en una societat marcadament masclista; va poder simultaniejar l’exercici de la seva veritable vocació amb les
obligacions familiars. Inicialment becaria al Museu de Zoologia va entrar al Parc Zoològic de Barcelona on du a terme una important tasca
de modernització de la que destaca l’Aviari, avançat al seu temps. Va contribuir en la introducció a casa nostra de l’etologia, disciplina no
acceptada a principis dels anys 70. Passà de nou al Museu però ja com a directora. La seva tasca allí va representar un pas decisiu en la consolidació
i modernització d’aquell, obrint-lo a la ciutadania. Va ser capaç d’atreure l’atenció de polítics i uns recursos econòmics extraordinaris
per l’època. Roser Nos no va destacar per una carrera pròpia en la recerca, però va jugar un paper clau en la valorització tant del Museu
com del Zoo de Barcelona. Va saber incentivar i impulsar molta gent jove que posteriorment han desenvolupat carreres notables gràcies a
la seva visió i generositat. Vist amb perspectiva va ser una pionera important per entendre aspectes de la història recent i l’evolució de les
principals institucions zoològiques catalanes durant els profunds canvis de les dècades dels anys 60, 70 i 80 del segle passat.
Paraules clau: Museu de Zoologia de Barcelona, Parc Zoològic de Barcelona, etologia, observació d’aus, història de la zoologia catalana.Roser Nos Ronchera (1924-2018) was a good example of a scientist capable of overcoming, with great tenacity, a series of adversities
to develop a long and remarkable career. Born in a small and remote town, she was forced to study teaching, but over time she ended up obtaining
the desired degree in the field of natural sciences at the University of Barcelona, with an extraordinary prize, in a post-war context.
and in a markedly sexist society; he was able to simultaneously exercise his true vocation with family obligations. Initially a fellow at the
Museum of Zoology, she entered the Barcelona Zoo where she carried out important modernization work, of which the Aviary stands out,
ahead of its time. He contributed to the introduction of ethology in our country, a discipline not accepted in the early 1970s. He returned to
the Museum but as the director. His work there was a decisive step in consolidating and modernizing it, opening it up to the public. He was
able to attract the attention of politicians and extraordinary economic resources for the time. Roser Nos did not stand out for his own career
in research, but he played a key role in valuing both the Museum and the Zoo of Barcelona. He knew how to encourage many young people
who have subsequently developed remarkable careers thanks to his vision and generosity. Seen in perspective, he was an important pioneer
in understanding aspects of the recent history and evolution of the main catalan zoological institutions during the profound changes of the
1960s, 1970s and 1980s
Inventaris d'aus aquàtiques de Catalunya dels mesos de gener de 1977, 1979 i 1980
Full text linkMid-winter waterfowl counts from 1977, 1979 and 1980 are detailed here. The localities where the censuses took place were choosen mainly on acount of the wildfowl requirements.
One locality is ouststanding, the Ebro Delta, and in second place the marshes of the Roses Bay.
The minimum total of winter waterfowl in Catalonia if the coastal gulls are also included is between 150.000-170.000 birds. From the point of view of interesting species
the following are noteworthy: Burhinus oedionemus, Egretta alba and Oxyura leucocephala. Of the last species this is the second record for Catalonia
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
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