1,720,970 research outputs found
Time domain deconvolution approach relying on Galois sequences
No full textDesign/methodology/approach - The method is based on the time-domain analysis of the '' defect response '' and joins the PEC approach with the exploitation of the peculiar auto-correlation properties of the Galois sequences. The procedure, relying on the deconvolution of Galois sequences, greatly improves the signal to noise ratio (SNR) and thus the operating depth. De-convolving even short Galois sequences allows one to investigate at depth ranges larger than those allowed by the conventional pulsed excitation techniques.
Findings - The technique has been tested on a benchmark and compared with numerical simulations. The experimental results showed that the SNR and the detection depth range have been significantly improved.
Research limitations/implications - Some limitations of the measuring set up were evidenced requiring a new measuring apparatus if explorations at larger depths are of interest: the 0.1 per cent impedance differences among the four coils in the bridge, although limited by an accurate construction, resulted in a limitation of the measuring system in DSP procedure adopted to null the background signal: different probe configurations must be pursued in order to allow further improvements in the deep defect detection.
Originality/value - For the first time the peculiar Galois sequences excitation was applied in a PEC system. By using these inputs the signal energy was significantly enhanced, allowing one to reconstruct by the deconvolution process the crack signatures
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
Numerical Identification Procedure for a Phenomenological Vector Hysteresis Model
No full textThis paper presents an identification procedure for a phenomenological vector hysteresis model, called the Della Torre, Pinzaglia and Cardelli Model, introduced as a general hysteresis vector model for magnetic materials. The identification of the distribution function
is approached by using the classical deterministic inverse problem theory and a suitable regularization procedure. A discussion on the presented method and an identification process for a sample of commercial Fe–Si magnetic steel are provided
The management of mild neurocognitive disorder in primary care: A Delphi consensus study
No full textBackground: Strategies to identify and treat mild neurocognitive disorder (mild NCD) are still unclear. Objective: The detection and management of mild NCD are crucial to prevent or delay its progression to major NCD, and to help those affected cope with cognitive impairment. The Cartesio Project aimed to reach a consensus on the management of mild NCD in primary care. Methods: The Advisory Board of five experts (three neurologists, one geriatrician and one general practitioner (GP)), identified four domains of mild NCD: case finding; differential diagnosis; non-pharmacological, and pharmacological intervention. A literature review was performed by consulting the PubMed, PsycNET and Scopus databases from 2017 until August 2022, and guidelines, reviews and meta-analyses on mild NCD were reviewed. A care pathway involving 18 statements was then proposed and voted on by 61 participants (39% neurologists, 31% geriatricians, 25% GPs and 5% psychiatrists). Results: Agreement was reached on 14 out of 18 statements. The practice of case finding in primary care and the need for a two-level diagnostic approach was supported, including referral to memory clinics. With regard to non-pharmacological treatments, no consensus was reached on nutritional supplementation. There was support for the use of nootropic drug treatments, but not for drugs to treat Alzheimer's disease. Conclusions: The Cartesio Project developed a consensus to identify the best care for mild NCD. The consensus highlights educational interventions on timely detection and appropriate management of mild NCD in primary care, which may be of relevance for those patients who eventually develop Alzheimer's disease
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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