1,720,988 research outputs found
Atlante illustrato dei funghi del Parco
No full textLa monografia raccoglie la descrizione di 845 specie di macromiceti, di cui 47 di Ascomiceti e 798 di Basidiomiceti elencate in ordine sistematico, le località e l'ambiente di raccolta. 638 specie sono illustrate con foto a colori
Synthesis of the alkoxo(hydrido)-clusters [Ru3(μ-H)(CO)10(μ-OR)][R = Me, Et, Prn, or Bun] catalysed by dinuclear carbonyl iron complexes
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ORGANOMETAL CLUSTERS AS MODELS FOR CORROSION-INHIBITORS. THE REACTION OF OS3(CO)10(NCCH3)2 WITH BENZOTRIAZOLE
No full textAnalysis and Design of Coupled PLL-Based CMOS VCOs
No full textA novel architecture to implement quadrature voltage-controlled oscillators (QVCOs), based on the coupled phase-locked loop (CPLL) technique, is presented. The proposed solution allows to overcome the trade-off between low phase noise and small quadrature error, typical of conventional QVCOs. Both figure-of-merit (FoM) can then be optimized simultaneously. Within the CPLL bandwidth, the QVCO phase noise is even improved by 3 dB with respect to the phase noise of the stan-dalone free-running oscillators in the loop. Prototypes realized in a 28 nm bulk CMOS technology operate from 24 to 29.2 GHz (a 20% tuning range) and show a -134 dBc/Hz phase noise at 10 MHz offset from the 24 GHz carrier. The measured average quadrature error across the tuning range is 0.9?. The QVCO dissipates 60 mW; its FoM is -184 dBc/Hz. The QVCO core area amounts to 0.2 mm(2)
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
A 10.7-14.1 GHz Reconfigurable Octacore DCO with -126 dBc/Hz Phase Noise at 1 MHz offset in 28 nm CMOS
No full textThis paper presents an octacore DCO, implemented in a 28 nm CMOS technology, able to achieve an outstanding phase noise performance: -126 dBc/Hz at 1 MHz offset from the 10.7 GHz carrier with 173 mW power consumption. The design is scalable, as the network coupling the oscillator cores can be reconfigured allowing to switch off some cores to save power without incurring in any additional phase noise penalty other than the one expected from the reduction of the number of the active cores. The DCO achieves a 27% tuning range with 6 MHz frequency resolution
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
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
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