1,721,081 research outputs found
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
STEP-NC enabled edge–cloud collaborative manufacturing system for compliant CNC machining
Full text linkIn recent years, edge–cloud collaborative manufacturing systems have been applied to achieve accurate data tracking and intelligent machining analysis in the field of CNC machining. However, due to the lack of other dimensional tags, such as workstep and speed, which are related to process data, the current systems are still at a level of processing time-tag machining data. It is of great significance to address the problem of linking actual machining data with other dimensional tags, which can achieve more accurate and intelligent data interaction between design and manufacturing. This paper proposes an edge–cloud collaborative manufacturing system based on STEP-NC, which enables the exchange of machining data tagged by workstep, improves the accuracy of data traceability, and lays the foundation for more intelligent processing analysis. Especially, a method of dynamic task delivery and data subscription according to the environment is proposed to improve the manufacturing system's two-way data flow interaction ability. On the basis of that, a manufacturing information segmentation method based on workstep is proposed, which makes it easier to sort information from the coupled data. In addition, the system is compatible with heterogeneous CNC machine tools to achieve large-scale industrial applications. Finally, a prototype system has been installed in a workshop located in COMAC, and corresponding experiments are carried out on the CNC machine tool for COMAC parts manufacturing, which verifies the feasibility of the proposed method
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Polymetallic nodule mining: innovative concepts for commercialisation
No full textSeabed resources of value to the modern economy include oil and gas reserves, placerdeposits including diamonds and gold, and minerals found in the form of Seafloor MassiveSulfides, Sediments, Crusts and Polymetallic (Manganese) Nodules.A review of the published literature from previous research studies and field trials indicates that polymetallic nodules (PMN) are one of the most attractive marine mineral resources for commercial exploitation. Despite this the review clearly demonstrates a significant gap between the profitability of a PMN mining venture and that necessary to attract commercial investment. The level of investment risk for current polymetallic nodule mining warrants areturn on investment (IRR) of 30-35%. The most optimistic projections for returns at current prices and using current technology are in the range 15-20%. Under these circumstances polymetallic nodule mining will not be commercially viable until risks are reduced or metal prices rise substantially.In light of this finding a review of the technical, environmental, financial and legal-social aspects of marine mining was carried out with a view to identifying opportunities to reduce the level of investment risk.Based on this analysis recommendations are made for technical and strategic decisions that may reduce the investment risk and remove the barrier to commercial seabed mining. Among these recommendations is a new concept for a PMN collector designed for greater efficiency and reduced downtime and a processing system that combines marine nodulefeedstock with land-based laterites.In addition to these two primary concepts a number of other technology-related areas are identified for reducing risk. Principles designed to increase the reliability of a marinemining system are illustrated in the form of ancillary concepts.Finally the underlying principles behind these concepts are summarised and discussed in detail to provide recommendations for potential technology proponents on the various methods to reduce the investment risk confronting marine mining
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