125,142 research outputs found
Arbor Scientiae
No full textFilm documentario sulla Riserva naturale Montagna di Torricchio.
Janusz Bogdan Faliński, ideazione e testi.
Franco Pedrotti, ideazione e testi.
Jarosław Faliński, regia, riprese, montaggio.
Roberto Canullo, testi e organizzazione della produzione
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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
Boron accumulation at epi-substrate silicon interface during epitaxial growth
No full textsilicio epitassiale, impurezze, assorbimento otticoBoron accumulation was observed close to the interface between an epitaxially grown silicon layer and a silicon substrate wafer and then analyzed. It was concluded that boron contamination interacting with the surface oxide on wafers led to boron accumulation close to the interface. Such accumulation is shown to occur for epilayers of standard thickness (approximately 10 μm), with boron being electrically unactive
Trattamento delle pseudoartrosi metafisarie distali di femore con fissatore estremo circolare
No full text
Treatment of noninfected nonunions: techniques other than compression- distraction methods.
No full textBiological time series data obtained from Point B
No full textThe following people are Co-PIs: for heterotrophic bacteria, prochlorococcus, synechococcus, pico-eukaryotes: Marie-Luiza Pedrotti (pedrotti@obs-vlfr); for small other zooplankton, copepoda, decapoda, chaetognatha, pteropoda, gelatinous filter feeding, gelatinous carnivorous: Lars Stemmann ([email protected]) and Amanda Elineau ([email protected])
Microtubule assembly is directly affected by MPP+ in vitro
No full textThe microtubular system is emerging as a cell target in neurodegeneration evoked by the Parkinsonism-inducing neurotoxin N-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) and its toxic metabolite N-methyl-4-phenylpyridinium (MPP+). Looking for a direct effect of the neurotoxin on microtubules, we have undertaken an in vitro study by using microtubule protein purified from bovine brain. We show that MPP+, but not MPTP, modifies the initial rate and the critical concentration of assembly without affecting microtubule ultrastructure. These findings strengthen the hypothesis for the role of microtubules in the transduction of MPP+ neurotoxic effect and, probably, in neuronal cell death
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