1,721,146 research outputs found
Feasibility of Robotic Autonomous System for Train Fluid Servicing
Get PDFPassenger train maintenance includes fluid servicing tasks of refilling water, wheel sand, coolant and windscreen wash; emptying effluent; and monitoring oil levels. These fluids servicing tasks generally present a structured environment where locations and required actions are known and therefore have a good prospect for successful automation. The feasibility of robotic autonomous system (RAS) to perform these key fluids servicing tasks was investigated. This project took a human-centred approach throughout, including Hierarchical Task Analysis, aiming to improve the quality of manual work by reducing the need for operators to carry out tasks that are ‘dirty, dull or dangerous’, and addressed how the operators could be best utilised when operating a RAS. Two RAS concepts emerged, a Cartesian RAS and an Articulator RAS, which were compared technically and economically. The need for fluid ‘ports’ of existing rolling stock to be modified for access by the RAS were also explored. It was found that the capacity of a Cartesian RAS would be approximately 16 vehicles/ hr and an Articulator RAS would be 20 vehicles/ hr. These results show at least a doubling in throughput compared to the approximate 8 vehicles/ hr for current manual fluid servicing processes to accommodate projected increases in passenger traffic. Either RAS requires only 1 operator compared to the 2-4 required for current fluid servicing processes but the Articulator RAS is approximately double the capital cost of the Cartesian RAS for a nominal 10-car service point. A physical proof-of-concept for modified fluid port interfaces and RAS end-effectors is the next step on the road map to developing and implementing a commercial solution to meet the increased demand. Progress with a follow-on project funded by InnovateUK starting in October 2017 will also be presented
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
Development of new ecological footprint techniques applicable to consumer electronics
No full textThis thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.In order to extend ecological footprint analysis (EFA) to electronic products, new methods had to be developed which associate the world average bioproductive space per capita and year - the fair Earth share - with an individual product. The problem analysed in this thesis is the need for an environmental assessment tool for electronic products, which uses natural capital accounting. This need arose because so far, electronic products were mainly assessed using life cycle analysis with a focus on toxicity.
Since the ecological footprint (EF) is a sustainability indicator, the sustainability discussion and in particular its relevance and implications with regard to the EF is reviewed. The electronic products assessed in this thesis are a personal computer (PC) in an exploratory study, and three mobile phones (two main case studies and one updated case study). To establish the land areas used by the mined materials used in electronic products, a database was developed based on site specific data found in the literature, and on approximations from the density of materials and their overburden. A life cycle energy approach was used to determine the burdens from producing and using a mobile phone. In order to estimate energy requirements for materials for which no data was available, the relationship between abundance and rucksack / overburden values was used in a regression analysis. Direct land use data and results from the energy analysis were used as an inventory for the subsequent EFA.
An EF time series was applied to represent a more accurate picture of PC and phone use. This was also necessary since the EF reflects the instantaneous rate (a snapshot) of resource consumption. Key results are that the EF of electronic products are much larger than their actual size and that different electronic products have different EF. Our methodology proved sensitive enough to reveal differences even in small electronic products, given the high benchmark of a fair Earth share, and useful in monitoring space-efficient technology
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