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Geomorphological features of the Kongsfjorden area: Ny-Ålesund, Blomstrandøya (NW Svalbard, Norway)
No full textIce retreat and advancement have affected the Svalbard Islands since the Last Glacial Maximum. The area shows a continuous transition, both in space and time, from glacial environments to proglacial, periglacial, and paraglacial ones. Periglacial processes (as well as landslides and slope, fluvial, and coastal processes) are overprinting pre-existing glacial landforms. Our study focuses on the geomorphological features of the paraglacial environment in some selected areas along Kongsfjorden (Svalbard, Norway): Ny-Ålesund and Blomstrandøya. The study is based on the geomorphological mapping, carried out over two field seasons (2013 and 2014), integrated by the interpretation of orthophotos from years 1998, 2008, and 2010. The results presented in this work connect the overall morphology of the area and the landform distribution to the main stages of the recent evolution of the Kongsfjorden area. This may contribute to a better understanding of the geomorphological and environmental changes induced by glacier retreat in a very sensitive high Arctic area. © 2016, Accademia Nazionale dei Lincei
A 106-dB A-Weighted DR Low-Power Continuous-Time ΣΔ Modulator for MEMS Microphones
Full text linkThis paper presents a low-power, high-performance continuous-time SD modulator for MEMS microphones front-end. The ΣΔ modulator 3rd-order loop filter has been implemented with a low-noise, power-optimized active-RC architecture that uses only two operational amplifiers. This solution, along with the use of a 15-level quantizer and of a feedback DAC with three-level current-steering elements, which minimizes the noise contribution for small input signals, allows achieving a DR larger than 100 dB, while consuming less than 0.5 mW, as required in always-running audio modules for portable devices. The proposed ΣΔ modulator, realized in 0.16-μm CMOS technology with an area of 0.21 mm^2, achieves 106-dB A-weighted DR and 91.3-dB peak SNDR, consuming 390 μW from a 1.6-V power supply
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
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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