1,720,967 research outputs found
Statistical vibration-based damage localization for the S101 bridge, Flyover Reibersdorf, Austria
No full textThis paper is focused on the description and application of an extended version of the Interpolation Method for the damage localization where a statistical characterization of the indicator is proposed. The damage indicator is defined in terms of the probability of exceedance of a detection threshold corresponding to the accepted probability of false alarm. The verification of the accuracy of the novel indicator is carried out with reference to a real case study of a typical example of a European highway pre-stressed concrete road bridge, the S101 Flyover Reibersdorf Bridge built in Austria in the early 1960. Responses to ambient vibration have been recorded on the bridge both in the undamaged and in several different damage scenarios artificially inflicted. In the paper data recorded on the S101 have been used to check the accuracy of damage indicator for the several damage scenarios and its sensitivity to the statistic model assumed to describe the variability of the damage feature
The Interpolation Method for vibration based damage localization: influence of feature uncertainties
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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
Enhancing Seed Germination Under Abiotic Stress: Exploring the Potential of Nano-Fertilization
No full textNowadays, climate change has a significant and negative impact on global agro-ecosystems. Consequently, the occurrence of abiotic stress is a major challenge to crop production, including the first phases of seed germination and plant establishment, that needs to be addressed. Farmers, especially in developing and underdeveloped countries, tend to use excessive amounts of fertilizer to increase the cultivated crop yields. Therefore, the adoption of sustainable agricultural practices is essential to satisfy the increased need for food safety and security in modern society while minimizing dependence on excessive use of agricultural inputs. There is growing interest in the use of Nano-fertilizers (NFs) to enhance seed germination and seedling establishment, crucial stages in the crop production process. Considering the limited number of studies in this field that have investigated the effects of NFs on enhancing seed germination under abiotic stress conditions, this review aims to address this research gap. The detrimental effects of various abiotic stress factors on seed germination parameters were discussed. In addition, NFs and traditional fertilizers were compared. Ultimately, different compositions, applications, current challenges, and future aspects of the application of NFs were explored. This study provided an insightful understanding of the benefits and challenges associated with the application of NFs in the early phase of plant development. By integrating these findings into policy strategies, stakeholders can effectively use nanofertilizers to promote sustainable agricultural practices
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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