1,721,208 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
Surface analytical characterization of Streptavidin/poly(3–hexylthiophene) bilayers for bio-electronic applications
No full textThe analytical performance of bioelectronic devices is highly influenced by their fabrication methods. In particular, the final architecture of field-effect transistor biosensors combining spin-cast poly(3-hexylthiophene) (P3HT) film and a biomolecule interlayer deposited on a SiO2/Si substrate can lead to the development of highly performing sensing systems, such as for the case of streptavidin (SA) used for biotin sensing. To gain a better understanding of the quality of the interfacial area, critical is the assessment of the morphological features characteristic of the adopted biolayer deposition protocol, namely: the layer-by-layer (LbL) approach and the spin coating technique. The present study relies on a combined surface spectroscopic and morphological characterization. Specifically, X-ray photoelectron spectroscopy operated in the parallel angle-resolved mode allowed the non-destructive investigation of the in-depth chemical composition of the SA film, alone or in the presence of the P3HT overlayer. Spectroscopic data were supported and corroborated by the results obtained with a Scanning Electron and a Helium Ion microscope investigation performed on the SA layer that provided relevant information on the protein structural arrangement or on its surface morphology. Clear differences emerged between the SA layers prepared by the two approaches, with the layer-by-layer deposition resulting in a smoother and better defined bio-electronic interface. Such findings support the superior analytical performance shown by bioelectronic devices based on LbL-deposited protein layers over spin coated ones. © 2017 Elsevier B.V
Surface analytical characterization of P3HT-streptavidin bilayers for biosensing applications
No full textUltrasensitive biosensors based on bottom gate organic field-effect transistors can be developed by depositing a functional biological (protein) interlayer directly on the silicon oxide gate dielectric and underneath the organic semiconductor film. However, the deposition methods for assembling the protein biological recognition layer can affect the biosensor analytical performances for the target analyte detection. Here, spin-coating and layer-by-layer techniques were considered as different approaches for streptavidin protein deposition. X-ray photoelectron spectroscopy (XPS) was systematically used in the non-destructive parallel angle resolved mode to characterize the multilayer device at each step of its assembly to gain information on elemental depth profiles. Scanning electron and scanning Helium ion microscopies gave information about stacked layer structure and morphology corroborating XPS results. © 2015 Materials Research Society
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
Il pesce e l\u27ariete. Festeggiando con i CavalIeri Danubiani
No full textThe present study analyzes the cult of the so-called Danubian Riders, with special emphasis on the sacrifices and sacred food involved. As primary sources the study uses the three-row reliefs that were made and circulated in the province of Dacia, and other variants of the lead tablets that were mostly distributed in Pannonia Inferior, around the center of Sirmium. These selected monuments reveal themselves as developed forms of this cult’s iconography, narrating mythical episodes through symbolic scenes and describing ritual acts. These complex iconographies are pseudonarrative because they include, among the diachronically ordered key scenes, essential data on the cult, the exponential moments of both the mythical and ritual rows. The meat of both fish and ram becomes the sacred food of the Gods and of the people adoring them, around a complex myth and ritual.Questo studio analizza l’iconografia del culto dei cosidetti Cavalieri Danubiani concentrandosi sui sacrifici e sui alimenti sacri. Si tratta di rilievi di pietra con tre registri prodotti e circolanti sul territorio della provincia Dacia, e di altre tre varianti di tavolette di piombo che ebbero maggiore diffusione nel Pannonia Inferiore, nella zona del centro di Sirmium. I monumeti scelti si rilevano come forme evolute dell’iconografia del culto che narrano attraverso le scene simboliche e gli episodi mitici e descrivono atti rituali. Queste iconografie complesse sono pseudo-narrative perché contengono tra le scene chiave, ordinate diacronicamente, le date essenziali del culto, i momenti esponenziali del registro mitico e rituale. La carne del pesce e del’ariete diventano gli alimenti sacri degli dei e della gente adorante intorno a un mito ed a un rituale complesso.Questo studio analizza l’iconografia del culto dei cosidetti Cavalieri Danubiani concentrandosi sui sacrifici e sui alimenti sacri. Si tratta di rilievi di pietra con tre registri prodotti e circolanti sul territorio della provincia Dacia, e di altre tre varianti di tavolette di piombo che ebbero maggiore diffusione nel Pannonia Inferiore, nella zona del centro di Sirmium. I monumeti scelti si rilevano come forme evolute dell’iconografia del culto che narrano attraverso le scene simboliche e gli episodi mitici e descrivono atti rituali. Queste iconografie complesse sono pseudo-narrative perché contengono tra le scene chiave, ordinate diacronicamente, le date essenziali del culto, i momenti esponenziali del registro mitico e rituale. La carne del pesce e del’ariete diventano gli alimenti sacri degli dei e della gente adorante intorno a un mito ed a un rituale complesso
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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