1,721,051 research outputs found
Autoconstructeurs moeten dringend op dieet. Stijgend gewicht auto's nefast voor gebruik en emissies
No full textAutoconstructeurs moeten dringend op dieet. Stijgend gewicht auto's nefast voor gebruik en emissies
No full textThe European PROSPER-project: Final results of the trial on Intelligent Speed Adaptation (ISA) in Belgium
No full textIn October 2002 a first ISA-trial in Belgium was held in Ghent. Until January 2004, 34 cars and 3 buses were equipped with the “active accelerator pedal (AAP)”. This means when the driver attempted to exceed the speed limit, a resistance in the accelerator was activated. If necessary, the driver could overrule the system. To study the effect of the ISA-system both surveys and analyses of driving data were held.
Data logging shows a clear effect of the ISA-system on speeding behaviour. Speeding reduces significantly. There is however still a large remaining percentage of distance speeding, especially in low speed zones. Differences between drivers are large. For some drivers speeding increases despite activation of the system. For less frequent speeders average driving
speed almost always increases and for more frequent speeders average tends to decrease. Less frequent speeders tend to accelerate faster towards the speed limit and drive exactly at the speed limit in stead of safely below, which causes average speeds to go up
The European PROSPER-project: Final results of the trial on Intelligent Speed Adaptation (ISA) in Belgium
No full textIn October 2002 a first ISA-trial in Belgium was held in Ghent. Until January 2004, 34 cars and 3 buses were equipped with the “active accelerator pedal (AAP)”. This means when the driver attempted to exceed the speed limit, a resistance in the accelerator was activated. If necessary, the driver could overrule the system. To study the effect of the ISA-system both surveys and analyses of driving data were held.
Data logging shows a clear effect of the ISA-system on speeding behaviour. Speeding reduces significantly. There is however still a large remaining percentage of distance speeding, especially in low speed zones. Differences between drivers are large. For some drivers speeding increases despite activation of the system. For less frequent speeders average driving
speed almost always increases and for more frequent speeders average tends to decrease. Less frequent speeders tend to accelerate faster towards the speed limit and drive exactly at the speed limit in stead of safely below, which causes average speeds to go up
The pros and cons of Intelligent Speed Adaptation as a restrictive measure for serious speed offenders
No full textIn 2011 in the Netherlands a field operational test was performed to investigate the possibility of using restrictive Intelligent Speed Adaptation (ISA) as a penalty system for serious speed offenders. This paper presents the overall results of the research focusing on the pros and cons of the use of ISA as a restrictive measure for serious speed offenders, and on the preconditions for deployment. The results showed that the ISA systems tested have a huge effect on driver behavior and have the potential to improve road safety by reducing the level of speeding, mean speed, as well as the standard deviation of speed. However, there are also cons: the behavioral change in driving behavior was only temporary. In addition the tested technology proved too easy to override, raised issues of equity, and a substantial back office is required when implementing the system for serious speed offenders. (C) 2014 Elsevier Ltd. All rights reserved.Dutch Ministry of Environment and Infrastructur
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
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