1,720,955 research outputs found
Thermal stability and current transfer in twisted-pair helium gas-cooled MgB<sub>2</sub> DC cables
No full textCERN’s helium gas-cooled, twisted-pair superconducting cable design, typically consisting of intercalated superconducting and copper (stabilising) tapes, is a novel design which offers low cable inductance for high-current DC power transmission. The electrical and thermal contacts between the copper and superconducting tapes, which are given by wrapping the complete ‘sandwich stack’ of tapes together in Kapton, are important parameters for current sharing, cryogenic stability and quench propagation. Observation of both IC and superconductor-stabiliser contact inhomogeneities due to the mechanical twisting process and the gas-cooling regime has shed light on overcoming the unique challenges these create in cable operation.Both an MgB2 twisted-pair cable assembly manufactured at CERN and a short-length single-sandwich strand made at the University of Southampton have been studied and a novel method for measuring contact resistance in situ has be designed and validated. Tests included measuring thermal runaway propagation velocity (vp) and minimum quench energy (MQE) plus long-period stability tests for the cable, along with characterisation of current transfer as well as contact resistance measurements between the superconductor and stabiliser layers in the single-sandwich. The results suggest that an optimised cable operation strategy may exist, being a trade-off between: high stabilisation with lower superconductor-stabiliser contact resistance; and fast propagation resulting in easier quench detection with higher superconductor-stabiliser contact resistance. The results of the investigations are relevant to both the CERN LHC High Luminosity upgrade and future superconducting power transmission projects
Discovering networks for culture change: lessons from one university's approach to tackling the STEM 'Diversity Deficit''
No full textA collaborative approach to schools engagement training for university staff
No full textThis paper describes the process of developing and delivering a new training programme to better equip university researchers to engage with and create interactive activities for schools. It has brought together people from within and beyond the university in many, often quite unexpected, ways. We discuss the points of learning for all involved, the strategic and logistical challenges faced, and offer some practical solutions to the challenges faced
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
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
- …
