1,721,858 research outputs found
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
Appraisal of waste collection routeing and scheduling
No full textThis paper appraises the capabilities and limitations of automated vehicle routeing and scheduling methods for designing efficient waste collection rounds. Ways in which waste collection authorities may be able to improve their operational performance through the use of vehicle routeing and scheduling applications are suggested and four case studies from England are included to give an indication of what benefits might be achievable, in terms of reduced vehicle distance, cost, environmental impact or improved service. The paper describes the practical problems associated with designing real-life collection rounds and highlights the areas in which available models may be lacking
Drepanosaurid (Reptilia: Diapsida) remains from a Late Triassic fissure infilling at Cromhall Quarry (Avon, Great Britain)
No full textAdditional Drepanosaur elements from the Triassic Fissure Infills of Cromhall Quarry, England
No full textThe Study of Time IV, eds J. T. Fraser, N. Lawrence, D. Park
No full textThe Study of Time IV, eds J. T. Fraser, N. Lawrence, D. Park. In: Revue d'histoire des sciences, tome 36, n°2, 1983. pp. 183-184
Quantifying the environmental benefits of collection/delivery points
No full textUsing a node-based routing and scheduling package, this paper estimates the environmental impacts of using a local railway station as a collection/delivery point (CDP) for small parcel transactions. This delivery option was compared with a typical existing situation where some customers who suffer a failed home delivery attempt decide to travel to the carrier's depot to collect their goods. The modelled results suggested that, at a 20 per cent take-up level, the CDP method would reduce the carbon monoxide emissions associated with the deliveries by around 20 per cent and other emissions (nitrogen oxide, particulate matter, carbon dioxide and hydrocarbons) by between 13 per cent and 15 per cent, with higher savings at higher take-up levels. The customer mileage attributable to the collection was modelled to reduce by up to 33 per cent. Modest travel savings were also found for the carrie
The study of Time III, éd. J. T. Fraser, N. Lawrence, D. Park
No full textThe study of Time III, éd. J. T. Fraser, N. Lawrence, D. Park. In: Revue d'histoire des sciences, tome 33, n°3, 1980. p. 261
The study of Time III, éd. J. T. Fraser, N. Lawrence, D. Park
No full textThe study of Time III, éd. J. T. Fraser, N. Lawrence, D. Park. In: Revue d'histoire des sciences, tome 33, n°3, 1980. p. 261
The Study of Time IV, eds J. T. Fraser, N. Lawrence, D. Park
No full textThe Study of Time IV, eds J. T. Fraser, N. Lawrence, D. Park. In: Revue d'histoire des sciences, tome 36, n°2, 1983. pp. 183-184
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