1,720,986 research outputs found
Flexible calculation approaches to support the European CO2 emissions regulatory scheme for road vehicles
Full text linkL'abstract è presente nell'allegato / the abstract is in the attachmen
Analysis of VECTO data for Heavy-Duty Vehicles (HDV) CO2 emission targets
Full text linkThis report summarises the analysis done on the data provided to the European Commissions’ Joint Research Centre by the Heavy Duty Vehicle manufacturers about the 2016 Heavy Duty Vehicles’ fleet composition and CO2 emissions performance. The results comprise of key metrics and a representative fleet-wide CO2 emissions baseline distribution for the year 2016 which were key inputs to the impact assessment study that supported the European Commission's proposal for new Heavy-Duty Vehicle CO2 standards in Europe. All datasets were checked for quality and errors and were validated against similar data calculated by external parties. CO2 emissions values were normalised to a common reference basis and CO2 distributions were produced for the four vehicle categories of interest. The normalisation process led to lower fleet-wide CO2 emissions, an important observation for defining realistic CO2 limits for the post-2020 period.JRC.C.4 - Sustainable Transpor
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
Calculating Heavy-Duty Truck Energy and Fuel Consumption Using Correlation Formulas Derived From VECTO Simulations
No full textThe Vehicle Energy Consumption calculation Tool
(VECTO) is used in Europe for calculating standardised
energy consumption and CO2 emissions from
Heavy-Duty Trucks (HDTs) for certification purposes. The
tool requires detailed vehicle technical specifications and a
series of component efficiency maps, which are difficult to
retrieve for those that are outside of the manufacturing
industry. In the context of quantifying HDT CO2 emissions,
the Joint Research Centre (JRC) of the European Commission
received VECTO simulation data of the 2016 vehicle fleet from
the vehicle manufacturers. In previous work, this simulation
data has been normalised to compensate for differences and
issues in the quality of the input data used to run the simulations.
This work, which is a continuation of the previous
exercise, focuses on the deeper meaning of the data received
to understand the factors contributing to energy and fuel
consumption. Fuel efficiency distributions and energy breakdown
figures were derived from the data and are presented in
this work. Correlation formulas were produced to calculate
the energy loss contributions of individual components and
resistances (air drag, rolling resistance, axle losses, gearbox
losses, etc.) over the Regional Delivery and Long Haul cycles,
given a limited number of input parameters such as vehicle
characteristics and average component efficiencies. Default
values and meaningful ranges of variation of these parameters
obtained from the data of the fleet are also reported in this
work. The importance of air drag and rolling resistance losses
are highlighted since these losses account for about 70% of
the energy consumed downstream the engine. Finally, based
on the correlation formulas to calculate the individual energy
losses, a method is presented that calculates the final energy
consumption and CO2 emissions for all the regulated HDTs
classes and that does not rely on the use of VECTO
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
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