1,720,954 research outputs found
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
Systematics of pygmy rowerhoppers (Insecta: Orthoptera: Scelimeninae) based on morphological characters
No full textTrnovratke (Tetrigidae) jedna su od najvećih skupina skakavaca, ali su za razliku od ostalih
skupina vezani za vodu. Jedna skupina među njima posebno je usko specijalizirana za život u vodi
i oko nje, a to su skakavci veslači (potporodica Scelimeninae). Njezin jedini tribus Scelimenini
obuhvaća oko 100 vrsta unutar 15 rodova, a radi se o najduljim trnovratkama na svijetu. Do sada
ova potporodica nikad nije bila sistematski organizirana. Cilj ovog diplomskog rada je odrediti
položaj potporodice Scelimeninae, kao i odnose između i unutar rodova skakavaca veslača.
Molekularna filogenija pokazala je da ovoj potporodici pripadaju rodovi Scelimena i
Paragavialidium, ali ne i rod Falconius. Analizom glavnih komponenti (PCA) definirane su tri
skupine – ona roda Scelimena, ona roda Paragavialidium i ona roda Falconius, a rodovi Tefrinda
i tri vrste roda Tegotettix, kao i u ostalim analizama, ostali su nesvrstani. Kladistička je analiza
polučila iste rezultate te pokazala da unutar potporodice Scelimeninae postoje dvije srodne skupine
rodova. Jednoj pripada rod veslača Scelimena i srodni rodovi, a drugoj skupini pripadaju rodovi
neveslača, tj. Gavialidium i srodni rodovi. Rod Falconius se, kao ni u molekularnoj filogeniji, nije
priklonio nijednoj skupini. Beskrilni rod Austrohancockia po prvi je put morfološki
okarakterizirana kao pripadnik potporidice Scelimeninae. Ustanovljeno je da su neke vrste
svrstane u pogrešne rodove te im je potrebna taksonomska revizija.Pygmy grasshoppers (Tetrigidae) are one of the largest grasshoppers' families, but are, unlike other
groups, closely related to water habitats. One group of pygmy grasshoppers is especially connected
to rivers and ponds – the rowerhoppers, subfamily Scelimeninae. This subfamily with its only
tribe, Scelimeni, gathers around 100 species within 15 genera. Those are the longest pygmy
grasshoppers in the world. This subfamily has never been classified by the means of evolutionary
systematics. The aim of this study was to determine the position of the subfamily Scelimeninae
within Tetrigidae, as well as to investigate the relationships of the genera and species within the
subfamily. Molecular phylogeny shows that Scelimena and Paragavialidium belong to this
subfamily, but Falconius does not. Principal Component Analysis (PCA) shows three clusters, i.e.,
Scelimena genus group, Paragavialidium genus group, and Falconius genus group. Three species
of Tegotettix and Tefrinda do not have clear affinity to any of the groups. Cladistic analysis agrees
with previous analyses and shows that within Scelimeninae there are two genus groups, the one
including Scelimena and related genera, as well as Paragavialidium and related genera. Genus
Falconius belongs to its own group, and as in molecular phylogeny, its placement remains unclear.
Apterous Austrohancockia has been characterized as Scelimeninae member for the first time. It
was determined that some genera require taxonomic revision because some species have been
incorrectly placed
Courtship in spiders
Get PDFPaukovi (Araneae) su globalno rasprostranjeni red beskralježnjaka, uspijevajući naseliti sve
kontinente osim Antarktike, i zauzimajući gotovo sve ekološke niše. Ne nastanjuju jedino
vodu i zrak, iako se u dijelovima svog života itekako mogu njima okoristiti. Izrazito su
varijabilnih prilagodbi, morfologije i strategija udvaranja.
Ovaj rad pruža uvid u raznolikost snubljenja po značajnijim i najviše istraženim porodicama.
Općenito, dalekovidni lovci koristit će osjetila vida i vizualne signale, kratkovidni lovci osjet
dodira, a paukovi koji pletu mreže vibracije koje se prenose mrežom.Spiders (Araneae) are globally distributed order of invertebrates that managed to take over
every continent except for Antarctica, and taking almost every ecological niche. They don't
habituate only air and water, although in some parts of their lives, they can certainly use them
to their benefit. They're very variable in adaptations, morphology and courtship strategies.
This study offers insight in the diversity of courtship by more relevant and best-studied
families. Generally, long-sighted hunters will use the sense of sight and visual displays, shortsighted hunters by touch, and orb-weavers vibrations transmitted through the web
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
- …
